Skip several gcc.dg/builtin-dynamic-object-size tests on hppa*-*-hpux*

[official-gcc.git] / gcc / ada / ChangeLog-2021

2021-12-28  Martin Liska  <mliska@suse.cz>

        * doc/share/gnu_free_documentation_license.rst: Replace http:// with https.
        * gnat-style.texi: Likewise.
        * gnat_rm.texi: Likewise.
        * gnat_ugn.texi: Likewise.

2021-12-09  Jakub Jelinek  <jakub@redhat.com>

        PR pch/71934
        * gcc-interface/decl.c (gt_pch_nx): Pass NULL as new middle argument
        to op.

2021-12-02  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/Make-lang.in (ADA_GENERATED_FILES): Add warning.

2021-12-02  Marc Poulhiès  <poulhies@adacore.com>

        * gcc-interface/a-assert.ads, gcc-interface/a-assert.adb: Remove.

2021-12-02  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity): Do not back-annotate a
        maximum size for the Esize of limited record and concurrent types.

2021-12-02  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/gigi.h (aggregate_type_contains_array_p): Delete.
        (type_has_variable_size): Declare.
        * gcc-interface/decl.c (adjust_packed): Return 0 only if the field
        type is an array with variable size.
        * gcc-interface/utils.c (aggregate_type_contains_array_p): Make
        static and remove SELF_REFERENTIAL parameter.
        (type_has_variable_size): Make public.
        (create_field_decl): Adjust call to aggregate_type_contains_array_p.

2021-12-02  Justin Squirek  <squirek@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity): Skip normal
        processing for Itypes that are E_Class_Wide_Subtype with
        Equivalent_Type set.

2021-12-02  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (Call_to_gnu): Rename GNAT_NAME variable
        into GNAT_SUBPROG to avoid later shadowing.

2021-12-02  Yannick Moy  <moy@adacore.com>

        * libgnat/s-arit32.adb: Add ghost instances and lemmas.
        (Scaled_Divide32): Add ghost code to prove. Minor code
        modification to return early in error when divisor is zero.
        * libgnat/s-arit32.ads: Add ghost instances and utilities.
        (Scaled_Divide32): Add contract.

2021-12-02  Eric Botcazou  <ebotcazou@adacore.com>

        * sprint.adb (Source_Dump): Set both Print_Generated_Code and
        Debug_Generated_Code to False at the end.

2021-12-02  Marc Poulhiès  <poulhies@adacore.com>

        * sem_aggr.adb (Resolve_Array_Aggregate): Filter out nodes not
        coming from source before emitting the warning.

2021-12-02  Yannick Moy  <moy@adacore.com>

        * libgnat/s-aridou.adb (Log_Single_Size, Big_0): New ghost
        constants.
        (Lemma_Mult_Non_Negative, Lemma_Mult_Non_Positive,
        Lemma_Not_In_Range_Big2xx64): New lemmas on big integers.
        (Double_Divide): Remove justifications. Amend for that local
        lemma Prove_Overflow_Case.
        (Scaled_Divide): Remove justifications. Insert for that local
        lemmas Prove_Negative_Dividend, Prove_Positive_Dividend and
        Prove_Q_Too_Big, and amend local lemma Prove_Overflow.  To prove
        the loop invariant on (Shift mod 2 = 0), introduce local ghost
        variable Iter to count loop iterations, and relate its value to
        the value of Shift through Log_Single_Size, with the help of
        local lemma Prove_Power. Deal with proof regression by adding
        new local lemma Prove_First_Iteration and local ghost variable
        D123.
        * libgnat/s-arit64.ads (Multiply_With_Ovflo_Check64): Remove
        unnecessary Pure_Function on function as package is Pure.

2021-12-02  Yannick Moy  <moy@adacore.com>

        * libgnat/s-widthi.adb: Add pragma Annotate.

2021-12-02  Yannick Moy  <moy@adacore.com>

        * libgnat/s-widint.ads: Mark in SPARK.
        * libgnat/s-widlli.ads: Likewise.
        * libgnat/s-widllli.ads: Likewise.
        * libgnat/s-widlllu.ads: Likewise.
        * libgnat/s-widllu.ads: Disable ghost/contract.
        * libgnat/s-widthi.adb: Replicate and adapt the proof from
        s-widthu.adb.
        * libgnat/s-widthi.ads: Add minimal postcondition.
        * libgnat/s-widthu.adb: Fix comments in the modular case.
        * libgnat/s-widthu.ads: Add minimal postcondition.
        * libgnat/s-widuns.ads: Disable ghost/contract.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * rtsfind.ads (RE_Id, RE_Unit_Table): Add RE_Suspension_Object.
        * sem_util.adb (Is_Descendant_Of_Suspension_Object): Use Is_RTE.
        (Is_Suspension_Object): Remove body.
        * sem_util.ads (Is_Suspension_Object): Remove spec.
        * snames.ads-tmpl (Name_Suspension_Object): Remove, now
        unreferenced.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * exp_util.adb (Append_Freeze_Action): Tune whitespace to make
        the code look similar to Append_Freeze_Actions, which takes a
        List_Id.
        * sem_ch6.adb (Analyze_Return_Type): Cleanup with
        Append_Freeze_Action.
        * exp_ch3.adb (Build_Access_Subprogram_Wrapper_Body): Likewise.
        * sem_ch3.adb (Build_Access_Subprogram_Wrapper): Likewise.
        * contracts.adb (Add_Indirect_Call_Wrapper): Remove extra call
        to Ensure_Freeze_Node.
        (Add_Call_Helper): Likewise.
        * freeze.adb (Check_Inherited_Conditions): Likewise.
        (Attribute_Renaming): Likewise.
        * sem_ch8.adb: Likewise.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * doc/gnat_rm/standard_and_implementation_defined_restrictions.rst
        (No_Dispatching_Calls): Fix whitespace in example code.
        * gnat_rm.texi: Regenerate.
        * exp_ch13.adb (Expand_N_Freeze_Entity): Replace low-level
        membership test with a high-level wrapper.
        * exp_ch3.adb (Expand_Freeze_Record_Type): Remove unnecessary
        initialization of list of wrapper declarations and unnecessary
        guard for list of their bodies (if no bodies are created then
        Append_Freeze_Actions is a no-op).

2021-12-02  Marc Poulhiès  <poulhies@adacore.com>

        * exp_imgv.adb (Append_Table_To): Add new parameter to
        Make_Aggregate call.
        * gen_il-fields.ads (Opt_Field_Enum):
        Add Is_Parenthesis_Aggregate and Is_Enum_Array_Aggregate.
        * gen_il-gen-gen_nodes.adb (Union): Add Is_Enum_Array_Aggregate
        and Is_Parenthesis_Aggregate field to N_Aggregate.
        * libgnarl/s-interr.adb (User_Handler, User_Entry, Blocked)
        (Ignored, Last_Unblocker, Server_ID): Likewise.
        * libgnarl/s-intman.ads (Keep_Unmasked, Reserve): Likewise.
        * libgnarl/s-intman__posix.adb (Exception_Interrupts)
        (Initialize): Likewise.
        * libgnarl/s-mudido__affinity.adb (Create): Likewise.
        * libgnarl/s-osinte__linux.ads (Unmasked, Reserved): Likewise.
        * libgnarl/s-taprop__linux.adb (Create_Task, Set_Task_Affinity)
        * libgnarl/s-tasdeb.adb (Trace_On): Likewise.
        * libgnarl/s-tasdeb.ads (Known_Tasks): Likewise.
        * libgnarl/s-tasinf__linux.ads (Any_CPU, No_CPU): Likewise.
        * libgnarl/s-taskin.adb (Initialize_ATCB): Likewise.
        * libgnarl/s-taskin.ads (Ada_Task_Control_Block): Likewise.
        * libgnarl/s-tasren.adb (Default_Treatment)
        (New_State): Likewise.
        * libgnarl/s-tassta.adb (Trace_Unhandled_Exception_In_Task):
        Likewise.
        * libgnarl/s-tataat.adb (Index_Array): Likewise.
        * libgnarl/s-tpobop.adb (New_State): Likewise.
        * libgnat/a-calend.adb (Cumulative_Days_Before_Month)
        (Leap_Second_Times): Likewise.
        * libgnat/a-calend.ads (Days_In_Month): Likewise.
        * libgnat/a-cfinve.adb (Insert): Likewise.
        * libgnat/a-chahan.adb (Char_Map): Likewise.
        * libgnat/a-chtgbo.adb (Clear): Likewise.
        * libgnat/a-cobove.adb ("&", Insert, To_Vector): Likewise.
        * libgnat/a-cofove.adb (Insert, To_Vector): Likewise.
        * libgnat/a-cohata.ads (Hash_Table_Type): Likewise.
        * libgnat/a-coinve.adb (Merge, Insert, Insert_Space): Likewise.
        * libgnat/a-convec.adb (Insert, To_Vector): Likewise.
        * libgnat/a-coprnu.ads (Primes): Likewise.
        * libgnat/a-direct.adb (Empty_String): Use regular "" instead
        of aggregate.
        (Start_Search_Internal, Name_Case_Equivalence, Search)
        (Start_Search, Start_Search_Internal): Use bracket for
        aggregate.
        * libgnat/a-direct.ads (Start_Search,Search): Likewise.
        * libgnat/a-direio.adb (Zeroes): Likewise.
        * libgnat/a-nbnbre.adb (Leading_Padding, Trailing_Padding)
        (Numerator_Image): Likewise.
        * libgnat/a-ngrear.adb (Jacobi): Likewise.
        * libgnat/a-stbubo.adb (Get_UTF_8): Likewise.
        * libgnat/a-stbufo.adb (Put): Likewise.
        * libgnat/a-stbuun.adb (Get_UTF_8): Likewise.
        * libgnat/a-stbuut.adb (Put_7bit, Put_Character)
        (Put_Wide_Character, Put_Wide_Wide_Character): Likewise.
        * libgnat/a-stmaco.ads (Control_Set,Graphic_Set,Letter_Set)
        (Lower_Set, Upper_Set, Basic_Set, Decimal_Digit_Set)
        (Hexadecimal_Digit_Set, Alphanumeric_Set, Special_Set)
        (ISO_646_Set): Likewise.
        * libgnat/a-strbou.ads (Insert, Tail, "*", Replicate)
        (Null_Bounded_String): Likewise.
        * libgnat/a-strfix.ads (Head, Tail): Likewise.
        * libgnat/a-strmap.adb (To_Domain, Lemma_Is_Sorted): Likewise.
        * libgnat/a-strmap.ads (Null_Set): Likewise.
        * libgnat/a-strsup.adb (Super_Head, Super_Replicate)
        (Super_Tail): Likewise.
        * libgnat/a-strsup.ads (Super_Head, Super_Tail, Times)
        (Super_Replicate): Likewise.
        * libgnat/a-sttebu.adb (Put_UTF8, Wide_Put_UTF_16): Likewise.
        * libgnat/a-stuten.ads (BOM_16): Likewise.
        * libgnat/a-stwibo.ads (Null_Bounded_Wide_String): Likewise.
        * libgnat/a-stwima.ads (Null_Range): Likewise.
        * libgnat/a-stwisu.adb (Super_Head, Super_Replicate)
        (Super_Tail): Likewise.
        * libgnat/a-stzbou.ads
        (Null_Bounded_Wide_Wide_String): Likewise.
        * libgnat/a-stzmap.ads (Null_Range): Likewise.
        * libgnat/a-stzsup.adb (Super_Head, Super_Replicate)
        (Super_Tail, Super_Trim): Likewise.
        * libgnat/a-swmwco.ads (Control_Ranges, Graphic_Ranges)
        (Letter_Ranges, Lower_Ranges, Upeer_Ranges, Basic_Ranges)
        (Decimal_Digit_Ranges, Hexadecimal_Digit_Ranges)
        (Alphanumeric_Ranges, Special_Graphic_Ranges, ISO_646_Ranges)
        (Character_Ranges, Lower_Case_Mapping, Upper_Case_Mapping)
        (Basic_Mapping): Likewise.
        * libgnat/a-szmzco.ads (Control_Ranges, Graphic_Ranges)
        (Letter_Ranges, Lower_Ranges, Upeer_Ranges, Basic_Ranges)
        (Decimal_Digit_Ranges, Hexadecimal_Digit_Ranges)
        (Alphanumeric_Ranges, Special_Graphic_Ranges, ISO_646_Ranges)
        (Character_Ranges, Lower_Case_Mapping, Upper_Case_Mapping)
        (Basic_Mapping): Likewise.
        * libgnat/a-teioed.adb (Format_Number): Likewise.
        * libgnat/a-wtedit.adb (Format_Number): Likewise.
        * libgnat/a-ztedit.adb (Format_Number): Likewise.
        * libgnat/g-arrspl.adb (Separators): Likewise.
        * libgnat/g-catiio.adb (Month_Name_To_Number): Likewise.
        * libgnat/g-cgideb.adb (NL, Title): Likewise.
        * libgnat/g-comlin.adb (Internal_Initialize_Option_Scan)
        (Display_Section_Help): Likewise.
        * libgnat/g-comlin.ads (Opt_Parser_Data): Likewise.
        * libgnat/g-debpoo.adb (Set_Dead_Beef, Dump): Likewise.
        * libgnat/g-expect.adb (Expect, Has_Process, Send): Likewise.
        * libgnat/g-forstr.adb ("+", Get_Formatted): Likewise.
        * libgnat/g-memdum.adb (Dump): Likewise.
        * libgnat/g-rannum.adb (Image): Likewise.
        * libgnat/g-sechas.adb (Final, HMAC_Initial_Context): Likewise.
        * libgnat/g-sehamd.ads (Initial_State): Likewise.
        * libgnat/g-sehash.ads (Initial_State): Likewise.
        * libgnat/g-sercom.ads (Data_Rate_Value): Likewise.
        * libgnat/g-sercom__linux.adb (C_Data_Rate, C_Bits, C_Stop_Bits)
        (C_Parity): Likewise.
        * libgnat/g-shsh32.ads (K, Transform): Likewise.
        * libgnat/g-shsh64.ads (K, Transform): Likewise.
        * libgnat/g-socket.adb (Levels, Modes, Shutmodes, Requests)
        (Options, Flags, Get_Name_Info, Image): Likewise.
        * libgnat/g-socket.ads (Inet_Addr_Bytes_Length, Inet_Addr_Type)
        (IPv4_To_IPv6_Prefix, Any_Inet_Addr, Any_Inet6_Addr)
        (No_Inet_Addr, Broadcast_Inet_Addr, Loopback_Inet_Addr)
        (Loopback_Inet6_Addr, Unspecified_Group_Inet_Addr)
        (All_Hosts_Group_Inet_Addr, All_Routers_Group_Inet_Addr)
        (Unspecified_Group_Inet6_Addr, All_Hosts_Group_Inet6_Addr)
        (All_Routers_Group_Inet6_Addr): Likewise.
        * libgnat/g-socpol.adb (To_C, Status, Get_Events): Likewise.
        * libgnat/g-socpol.ads (Input_Event, Output_Event, Both_Event)
        (Error_Event): Likewise.
        * libgnat/g-sothco.ads (Families, Lengths, Sockaddr): Likewise.
        * libgnat/g-spipat.adb (OK_For_Simple_Arbno): Likewise.
        * libgnat/i-cobol.ads (Ada_To_COBOL, COBOL_To_Ada): Likewise.
        * libgnat/i-pacdec.adb (Packed_Byte): Likewise.
        * libgnat/i-pacdec.ads (Packed_Size): Likewise.
        * libgnat/s-bitops.adb (Masks): Likewise.
        * libgnat/s-crc32.adb (Table): Likewise.
        * libgnat/s-gearop.adb (Unit_Matrix, Unit_Vector): Likewise.
        * libgnat/s-genbig.adb (Out_data, Zero_Data, Big_Exp, Big_Mul)
        (To_Bignum, To_String, Image, Leading_Padding): Likewise.
        * libgnat/s-htable.adb (Reset): Likewise.
        * libgnat/s-imgcha.adb (C0, C1): Likewise.
        * libgnat/s-powflt.ads (Powten): Likewise.
        * libgnat/s-powlfl.ads (Powten): Likewise.
        * libgnat/s-powllf.ads (Powten): Likewise.
        * libgnat/s-rannum.adb (Matrix_A, Random_Float_Template, Image):
        Likewise.
        * libgnat/s-rannum.ads (Generator): Likewise.
        * libgnat/s-regexp.adb (Compile,Create_Primary_Table)
        (Create_Primary_Table_Glob, Create_Secondary_Table, Compile):
        Likewise.
        * libgnat/s-regpat.adb (Bit_Conversion, Set, Dump_Until)
        (Dump_Current, Dump_Error, Try, Reset_Class): Likewise.
        * libgnat/s-regpat.ads (Pattern_Matcher, Never_Match): Likewise.
        * libgnat/s-scaval__128.adb (Initialize): Likewise.
        * libgnat/s-statxd.adb (Fields, W_F, W_LF)
        (W_LLF, W_SF): Likewise.
        * libgnat/s-stausa.adb (Initialize, Initialize_Analyzer)
        (Output_Results): Likewise.
        * libgnat/s-strops.adb (Str_Concat_SC): Likewise.
        * libgnat/s-valrea.adb (Maxexp32, Maxexp64, Maxexp80): Likewise.
        * libgnat/s-wchcon.ads (WC_Encoding_Letters)
        (WC_Longest_Sequences): Likewise.
        * par-ch4.adb (P_Aggregate_Or_Paren_Expr): Set
        Is_Parenthesis_Aggregate when creating a N_Aggregate using
        parenthesis.
        * scng.adb (Scan): Lower version needed for bracket syntax from
        Extensions to Ada2022.
        * sem_aggr.adb (Resolve_Aggregate): Raise error for container
        aggregate using parenthesis instead of bracket.
        (Resolve_Array_Aggregate): Raise warning for aggregate using
        parenthesis in Ada2022 with obsolescent warning enabled and not
        in GNAT mode.
        * sem_util.ads (Check_Ambiguous_Aggregate): Typo fix in comment.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * libgnarl/a-taside.ads (Activation_Is_Complete): Add pragma
        Inline.

2021-12-02  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_ch12.adb (Freeze_Package_Instance): Consistently consider
        the freeze node of the parent and use large inequality for
        Slocs.
        (Freeze_Subprogram_Instance): Likewise.
        (Insert_Freeze_Node_For_Instance): For an instance in a package
        spec with no source body that immediately follows, consider the
        body of the package for the placement of the freeze node and go
        to the outer level if there is no such body.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch13.ads (Expand_N_Freeze_Entity): Add note about a SPARK
        twin.
        * exp_ch3.ads (Freeze_Type): Likewise.
        * exp_spark.adb (Expand_SPARK_N_Freeze_Entity): Mimic what is
        done in Freeze_Entity.
        (SPARK_Freeze_Type): Mimic what is done in Freeze_Type; add call
        to Make_Predefined_Primitive_Eq_Spec.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Make_Predefined_Primitive_Specs): Move code for
        spec of dispatching equality.
        (Predefined_Primitive_Bodies): Move code for body if dispatching
        equality.
        (Make_Predefined_Primitive_Eq_Spec): Separated code for spec of
        dispatching equality.
        (Predefined_Primitive_Eq_Body): Separated code for body of
        dispatching equality.
        * exp_ch3.ads: Update.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/s-valuti.ads (Scan_Natural_Ghost): Split body from
        spec and put it into private part, so that GNATprove can pick it
        both when analysing the unit and its clients.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * exp_aggr.adb, exp_ch6.adb, par-ch4.adb, sem_ch13.adb: Remove
        extra space after ":=" symbol.
        * gen_il-gen.adb: Likewise; add missing headerbox.

2021-12-02  Richard Kenner  <kenner@adacore.com>

        * rtsfind.adb (Maybe_Add_With): Ensure that the added "with" is
        never marked as ignored ghost code.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * freeze.adb (Freeze_Entity): Replace First_Entity/Next_Entity
        with First_Component/Next_Component; remove condition with Ekind
        equal to E_Component.
        * sem_ch13.adb (Check_Record_Representation_Clause): Likewise
        for component-or-discriminant.
        * sem_util.adb (Is_Fully_Initialized_Type): Likewise; rename Ent
        to a more specific Comp.
        * sem_warn.adb (Check_References): Likewise.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Warn_On_Unassigned_Out_Parameter): Move inner
        loop at the beginning of subprogram, so it is executed only
        once; fix order in the "add an ad hoc" phrase.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Check_References): Remove redundant condition.

2021-12-02  Doug Rupp  <rupp@adacore.com>

        * vxworks7-cert-rtp-link__ppcXX.spec: New file.
        * Makefile.rtl: Use it.

2021-12-02  Yannick Moy  <moy@adacore.com>

        * libgnat/i-c.adb: Add ghost code.
        (C_Length_Ghost): New ghost functions to query the C length of a
        string.
        (To_Ada): Insert constant Count_Cst where needed to comply with
        SPARK.  Homogeneize code between variants for char, wchar_t,
        char16_t and char32_t. Use char16_nul and char32_nul
        systematically instead of their value. Fix the type of index To
        to be Integer instead of Positive, to avoid a possible range
        check failure on an empty Target. Insert an exit statement to
        avoid a possible overflow failure when the last index in Target
        is Natural'Last (possibly on a small string as well).
        * libgnat/i-c.ads: Add contracts.
        (C_Length_Ghost): New ghost functions to query the C length of a
        string.
        * libgnat/s-os_lib.adb: Remove pragma Compiler_Unit_Warning
        causing a spurious error during compilation of GNAT, as this
        pragma is not needed anymore now that we bootstrap (stage1) with
        the base compiler runtime.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * libgnarl/a-taside.ads (Activation_Is_Complete): Add
        precondition.

2021-12-02  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch3.adb (Check_Derived_Type): Rename local variables; fix
        style in comment.

2021-12-02  Yannick Moy  <moy@adacore.com>

        * libgnat/s-valboo.adb (First_Non_Space_Ghost): Move to
        utilities.
        (Value_Boolean): Prefix call to First_Non_Space_Ghost.
        * libgnat/s-valboo.ads (First_Non_Space_Ghost): Move to
        utilities.
        (Is_Boolean_Image_Ghost, Value_Boolean): Prefix call to
        First_Non_Space_Ghost.
        * libgnat/s-valuer.adb (Scan_Raw_Real): Adapt to change of
        function Scan_Exponent to procedure.
        * libgnat/s-valueu.adb (Scan_Raw_Unsigned): Adapt to change of
        function Scan_Exponent to procedure.
        * libgnat/s-valuti.adb (First_Non_Space_Ghost): Function moved
        here.
        (Last_Number_Ghost): New ghost query function.
        (Scan_Exponent): Change function with side-effects into
        procedure, to mark in SPARK. Prove procedure wrt contract.
        Change type of local P to avoid possible range check failure (it
        is not known whether this can be activated by callers).
        (Scan_Plus_Sign, Scan_Sign): Change type of local P to avoid
        possible range check failure. Add loop invariants and assertions
        for proof.
        (Scan_Trailing_Blanks): Add loop invariant.
        (Scan_Underscore): Remove SPARK_Mode Off.
        * libgnat/s-valuti.ads (First_Non_Space_Ghost): Function moved
        here.
        (Last_Number_Ghost, Only_Number_Ghost, Is_Natural_Format_Ghost,
        Scan_Natural_Ghost): New ghost query functions.
        (Scan_Plus_Sign, Scan_Sign, Scan_Exponent, Scan_Trailing_Blanks,
        Scan_Underscore): Add functional contracts.

2021-12-02  Yannick Moy  <moy@adacore.com>

        * libgnat/s-imgboo.adb: Mark in SPARK.
        * libgnat/s-imgboo.ads: Mark in SPARK. Change from Pure to
        Preelaborate unit in order to be able to depend on
        System.Val_Bool.
        (Image_Boolean): Functionally specify the result of the
        procedure by calling System.Val_Bool.Value_Boolean on the
        result.
        * libgnat/s-valboo.adb: Mark in SPARK.
        (First_Non_Space_Ghost): New ghost function.
        (Value_Boolean): Change type of L and F to avoid possible range
        check failure on empty Str.
        * libgnat/s-valboo.ads: Mark in SPARK. Duplicate with-clause
        from body in the spec to be able to call
        System.Val_Util.Only_Space_Ghost in the contract.
        (First_Non_Space_Ghost): New ghost function computing the first
        non-space character in a string.
        (Is_Boolean_Image_Ghost): New ghost function computing whether a
        string is the image of a boolean value.
        (Value_Boolean): Add in precondition the conditions to avoid
        raising Constraint_Error. This precondition is never executed,
        and only used in proof, thanks to the use of pragma
        Assertion_Policy. Given that precondition, the postcondition can
        simply check the first non-space character to decide whether
        True or False is read.
        * libgnat/s-valuti.adb: Mark in SPARK, but use SPARK_Mode Off on
        all subprograms not yet proved.
        (Bad_Value): Annotate expected exception.
        (Normalize_String): Rewrite to avoid possible overflow when
        incrementing F in the first loop. Add loop invariants.
        * libgnat/s-valuti.ads: Mark in SPARK.
        (Bad_Value): Add Depends contract to avoid warning on unused S.
        (Only_Space_Ghost): New ghost function to query if string has
        only space in the specified range.
        (Normalize_String): Add functional contract.
        (Scan_Exponent): Mark spec as not in SPARK as this function has
        side-effects.

2021-12-02  Pascal Obry  <obry@adacore.com>

        * libgnat/g-socket.ads (Max_Name_Length): Initialize with
        NI_MAXHOST.

2021-12-02  Pascal Obry  <obry@adacore.com>

        * libgnat/g-socket.ads: Minor style fix.

2021-12-01  Eric Botcazou  <ebotcazou@adacore.com>

        * einfo.ads (E_Decimal_Fixed_Point_Subtype): Fix pasto.
        * freeze.adb (Freeze_Fixed_Point_Type): Retrieve the underlying type
        of the first subtype and do not use a stale value of Small_Value.
        * sem_res.adb (Resolve_Real_Literal): In the case of a fixed-point
        type, make sure that the base type is frozen and use its Small_Value
        to compute the corresponding integer value of the literal.

2021-12-01  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-cbdlli.ads (List): Remove extra space in Aggregate
        aspect.

2021-12-01  Gary Dismukes  <dismukes@adacore.com>

        * doc/gnat_rm/implementation_defined_pragmas.rst: Add
        documentation of the new form of formal subprogram default in
        the section on language extensions (pragma Extensions_Allowed).
        * gnat_rm.texi: Regenerate.
        * gen_il-gen-gen_nodes.adb: Add Expression as a syntactic field
        of N_Formal_(Abstract|Concrete)_Subprogram_Declaration nodes.
        * par-ch12.adb (P_Formal_Subprogram_Declaration): Add parsing
        support for the new default of a parenthesized expression for
        formal functions. Issue an error when extensions are not
        allowed, suggesting use of -gnatX. Update comment with extended
        syntax for SUBPROGRAM_DEFAULT.
        * sem_ch12.adb (Analyze_Formal_Subprogram_Declaration): Issue an
        error when an expression default is given for an abstract formal
        function. When a default expression is present for a formal
        function, install the function's formals and preanalyze the
        expression.
        (Instantiate_Formal_Subprogram): Fix typo in RM paragraph in a
        comment.  When a formal function has a default expression,
        create a body for the function that will evaluate the expression
        and will be called when the default applies in an instantiation.
        The implicit function is marked as inlined and as having
        convention Intrinsic.

2021-12-01  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_elab.adb (Previous_Suitable_Construct): New function declared
        in the Early_Call_Region_Processor package.
        (Find_ECR): Call it to get the previous node at the start.
        (Include): Call it to get the previous node during the traversal.

2021-12-01  Bob Duff  <duff@adacore.com>

        * sem_prag.adb (Process_Compile_Time_Warning_Or_Error): Do not
        follow the Corresponding_Spec pointer if Acts_As_Spec is True,
        because Corresponding_Spec is Empty in that case, so we would
        exit the loop prematurely, and incorrectly think we are not
        inside a generic unit when we are.

2021-12-01  Bob Duff  <duff@adacore.com>

        * par-ch3.adb (P_Access_Type_Definition): If Not_Null_Subtype is
        True, give an error in the access-to-subprogram cases.

2021-12-01  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_ch12.adb (Freeze_Package_Instance): Move up.

2021-12-01  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_ch12.adb (Freeze_Subprogram_Body): Rename into...
        (Freeze_Subprogram_Instance): ...this and change the name of the
        first parameter and local variables for the sake of consistency.
        (Insert_Freeze_Node_For_Instance): Use local variable Par_Inst.
        (Install_Body): Rename into...
        (Freeze_Package_Instance): ...this, remove first parameter and
        change the name of local variables for the sake of consistency.
        Do not deal with the special case of incomplete actual types here
        and do not insert the body.
        (Instantiate_Package_Body): Deal with the special case of incomplete
        actual types here and insert the body.  Call Freeze_Package_Instance
        only if expansion is done.
        (Instantiate_Subprogram_Body): Minor consistency tweak.

2021-12-01  Etienne Servais  <servais@adacore.com>

        * sem_aggr.adb (Resolve_Aggregate): Fix typo in comment.

2021-12-01  Steve Baird  <baird@adacore.com>

        * sem_case.adb (Check_Bindings): Provide a second strategy for
        implementing bindings and choose which strategy to use for a
        given binding. The previous approach was to introduce a new
        object and assign the bound value to the object.  The new
        approach is to introduce a renaming of a dereference of an
        access value that references the appropriate subcomponent, so no
        copies are made.  The original strategy is still used if the
        type of the object is elementary.  When the renaming approach is
        used, the initialization of the access value is not generated
        until expansion. Until this missing initialization is added, the
        tree looks like a known-at-compile-time dereference of a null
        access value: Temp : Some_Access_Type; Obj : Designated_Type
        renames Temp.all; This leads to problems, so a bogus initial
        value is provided here and then later deleted during expansion.
        (Check_Composite_Case_Selector): Disallow a case selector
        expression that requires finalization. Note that it is ok if the
        selector's type requires finalization, as long as the expression
        itself doesn't have any "newly constructed" parts.
        * exp_ch5.adb (Pattern_Match): Detect the case where analysis of
        a general (i.e., composite selector type) case statement chose
        to implement a binding as a renaming rather than by making a
        copy. In that case, generate the assignments to initialize the
        access-valued object whose designated value is later renamed
        (and remove the bogus initial value for that object that was
        added during analysis).
        * sem_util.ads, sem_util.adb: Add new function
        Is_Newly_Constructed corresponding to RM 4.4 term.

2021-12-01  Richard Kenner  <kenner@adacore.com>

        * frontend.adb (Frontend): Do unnesting after ignored ghost code
        has been removed.
        * inline.adb (Analyze_Inlined_Bodies): Don't put ignored ghost
        entities on inlined subprogram list.

2021-12-01  Ghjuvan Lacambre  <lacambre@adacore.com>

        * libgnarl/s-tasren.adb (Timed_Task_Entry_Call): Replace
        Defer_Abort and Undefer_Abort with Defer_Abort_Nestable and
        Undefer_Abort_Nestable.

2021-12-01  Ghjuvan Lacambre  <lacambre@adacore.com>

        * exp_ch7.adb (Cleanup_Record): Don't process parent.

2021-12-01  Justin Squirek  <squirek@adacore.com>

        * sem_attr.adb (Type_Key): Avoid premature use warnings when the
        prefix is a generic actual.

2021-12-01  Richard Kenner  <kenner@adacore.com>

        * gnat1drv.adb (Gnat1drv): Force generation of object file if
        compilation unit is an ignored ghost.

2021-12-01  Patrick Bernardi  <bernardi@adacore.com>

        * tracebak.c: Add AArch64 RTEMS support.

2021-12-01  Patrick Bernardi  <bernardi@adacore.com>

        * init.c: Add __gnat_error_handler and __gnat_install_handler
        for RTEMS.

2021-12-01  Eric Botcazou  <ebotcazou@adacore.com>

        * sprint.ads (Source_Dump): Fix typo in comment.
        * sprint.adb (Source_Dump): Set Dump_Freeze_Null for both -gnatG
        and -gnatD.
        * switch-c.adb (Scan_Front_End_Switches) <'D'>: Remove obsolete
        kludge.

2021-12-01  Yannick Moy  <moy@adacore.com>

        * einfo.ads (Direct_Primitive_Operations): Update the doc to
        indicate that this field is used for all types now.
        * sem_ch4.adb (Try_Object_Operation): Add parameter
        Allow_Extensions set to True to pretend that extensions are
        allowed.
        * sem_ch4.ads: Same.
        * sem_ch6.adb: Do not require Extensions_Allowed.
        * sem_ch8.adb (Find_Selected_Component): Remove duplicate
        "where" in comment.  Improve the error messages regarding use of
        prefixed calls.

2021-12-01  Yannick Moy  <moy@adacore.com>

        * sem_util.adb (Is_Extended_Precision_Floating_Point_Type): New
        function.
        * sem_util.ads (Is_Extended_Precision_Floating_Point_Type): New
        function.

2021-12-01  Piotr Trojanek  <trojanek@adacore.com>

        * exp_aggr.adb, sem_cat.adb, sem_ch10.adb, sem_ch12.adb,
        sem_elim.adb, sem_util.adb: Replace uses of Subprogram_Kind with
        Is_Subprogram.

2021-12-01  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-coinho.ads: Sync whitespace with
        a-coinho__shared.ads.
        * libgnat/a-coinho__shared.ads: Sync whitespace with
        a-coinho.ads.

2021-12-01  Piotr Trojanek  <trojanek@adacore.com>

        * Makefile.rtl (GNATRTL_TASKING_OBJS): Sort.
        (GNATRTL_NONTASKING_OBJS): Sort.

2021-12-01  Piotr Trojanek  <trojanek@adacore.com>

        * Makefile.rtl: Remove extra whitespace in special compilation
        rules.

2021-12-01  Piotr Trojanek  <trojanek@adacore.com>

        * doc/gnat_rm/the_gnat_library.rst (System.Atomic_Counters):
        Sync description with comment in s-atocou.ads.
        * gnat-style.texi, gnat_rm.texi, gnat_ugn.texi: Regenerate.

2021-12-01  Yannick Moy  <moy@adacore.com>

        * sem_ch10.adb (Is_Private_Library_Unit): Move query to
        Sem_Util for sharing.
        * sem_ch7.adb (Analyze_Package_Body_Helper): Add continuation
        message.
        * sem_prag.adb (Analyze_Part_Of): Call new function
        Is_Private_Library_Unit.
        (Check_Valid_Library_Unit_Pragma): Specialize error messages on
        misplaced pragmas.
        (Analyze_Refined_State_In_Decl_Part): Recognize missing Part_Of
        on object in private part.
        * sem_util.adb (Check_State_Refinements): Add continuation
        message.
        (Find_Placement_In_State_Space): Fix detection of placement,
        which relied wrongly on queries In_Package_Body/In_Private_Part
        which do not provide the right information here for all cases.
        (Is_Private_Library_Unit): Move query here for sharing.
        * sem_util.ads (Is_Private_Library_Unit): Move query here for
        sharing.

2021-12-01  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch3.adb (Analyze_Full_Type_Declaration): If the full type
        has a primitives list but its base type doesn't, set the base
        type's list to the full type's list (covers certain constrained
        cases, such as for arrays).
        (Analyze_Incomplete_Type_Decl): Unconditionally initialize an
        incomplete type's primitives list.
        (Analyze_Subtype_Declaration): Unconditionally set a subtype's
        primitives list to the base type's list, so the lists are
        shared.
        (Build_Derived_Private_Type): Unconditionally initialize a
        derived private type's list to a new empty list.
        (Build_Derived_Record_Type): Unconditionally initialize a
        derived record type's list to a new empty list (now a single
        call for tagged and untagged cases).
        (Derived_Type_Declaration): Unconditionally initialize a derived
        type's list to a new empty list in error cases (when Parent_Type
        is undefined or illegal).
        (Process_Full_View): Unconditionally copy the primitive
        operations from the private view to the full view (rather than
        conditioning it on whether extensions are enabled).
        * sem_ch7.adb (New_Private_Type): Unconditionally initialize an
        untagged private type's primitives list to a new empty list.

2021-12-01  Etienne Servais  <servais@adacore.com>

        * libgnat/a-cbhase.adb, libgnat/a-cborse.adb,
        libgnat/a-cihase.adb, libgnat/a-ciorse.adb,
        libgnat/a-cohase.adb, libgnat/a-coorse.adb
        (Constant_Reference,Reference_Preserving_Key): Refactor using
        the equivalence stated in the RM.

2021-12-01  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Make_Eq_Body): Refactor to avoid appending to an
        empty list; also, when exiting early we will not create any
        list; fix style in comment.

2021-12-01  Piotr Trojanek  <trojanek@adacore.com>

        * repinfo.adb (List_Entities): Simplify detection of entries;
        refactor potentially redundant comparison.

2021-11-29  Eric Gallager  <egallager@gcc.gnu.org>

        PR other/103021
        * gcc-interface/Make-lang.in: Use ETAGS variable in
        TAGS target.

2021-11-15  Iain Sandoe  <iain@sandoe.co.uk>

        * gcc-interface/Makefile.in: Use DSYMUTIL_FOR_TARGET in
        libgnat/libgnarl recipies.

2021-11-10  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/ada-tree.h (DECL_STUBBED_P): Delete.
        * gcc-interface/decl.c (gnat_to_gnu_entity): Do not set it.
        * gcc-interface/trans.c (Call_to_gnu): Use GNAT_NAME local variable
        and adjust accordingly.  Replace test on DECL_STUBBED_P with direct
        test on Convention and move it down in the processing.

2021-11-10  Bob Duff  <duff@adacore.com>

        * scng.adb (Check_Bidi): New procedure to give warning. Note
        that this is called only for non-ASCII characters, so should not
        be an efficiency issue.
        (Slit): Call Check_Bidi for wide characters in string_literals.
        (Minus_Case): Call Check_Bidi for wide characters in comments.
        (Char_Literal_Case): Call Check_Bidi for wide characters in
        character_literals.  Move Accumulate_Checksum down, because
        otherwise, if Err is True, the Code is uninitialized.
        * errout.ads: Make the obsolete nature of "Insertion character
        ?" more prominent; one should not have to read several
        paragraphs before finding out that it's obsolete.

2021-11-10  Bob Duff  <duff@adacore.com>

        * repinfo.adb (List_Component_Layout): Initialize Sbit.

2021-11-10  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Expand_Array_Equality): Fix inconsistent casing
        in comment about the template for expansion of array equality;
        now we use lower case for true/false/boolean.
        (Handle_One_Dimension): Fix comment about the template for
        expansion of array equality.

2021-11-10  Bob Duff  <duff@adacore.com>

        * repinfo.adb (List_Common_Type_Info, List_Object_Info): Add
        check for In_Generic_Scope.
        (List_Component_Layout): Check for known static values.
        * sem_ch13.adb (Check_Record_Representation_Clause): Add check
        for In_Generic_Scope.

2021-11-10  Etienne Servais  <servais@adacore.com>

        * aspects.adb, aspects.ads (Is_Aspect_Id): New function.
        * namet-sp.ads, namet-sp.adb (Aspect_Spell_Check,
        Attribute_Spell_Check): New Functions.
        * par-ch13.adb (Possible_Misspelled_Aspect): Removed.
        (With_Present): Use Aspect_Spell_Check, use Is_Aspect_Id.
        (Get_Aspect_Specifications): Use Aspect_Spell_Check,
        Is_Aspect_Id, Bad_Aspect.
        * par-sync.adb (Resync_Past_Malformed_Aspect): Use Is_Aspect_Id.
        * sem_ch13.adb (Check_One_Attr): Use Is_Aspect_Id.
        * sem_prag.adb (Process_Restrictions_Or_Restriction_Warnings):
        Introduce the Process_No_Specification_Of_Aspect, emit a warning
        instead of an error on unknown aspect, hint for typos.
        Introduce Process_No_Use_Of_Attribute to add spell check for
        attributes too.
        (Set_Error_Msg_To_Profile_Name): Use Is_Aspect_Id.
        * sem_util.adb (Bad_Attribute): Use Attribute_Spell_Check.
        (Bad_Aspect): New function.
        * sem_util.ads (Bad_Aspect): New function.

2021-11-10  Patrick Bernardi  <bernardi@adacore.com>

        * libgnarl/s-taskin.adb (Initialize_ATCB): Initialize
        T.Common.Current_Priority to Priority'First.
        * libgnarl/s-taskin.ads (Unspecified_Priority): Redefined as -1.
        * libgnat/system-rtems.ads: Start priority range from 1, as 0 is
        reserved by the operating system.

2021-11-10  Pierre-Alexandre Bazin  <bazin@adacore.com>

        * libgnat/a-nbnbig.ads: Mark the unit as Pure.
        * libgnat/s-aridou.adb: Add contracts and ghost code for proof.
        (Scaled_Divide): Reorder operations and use of temporaries in
        two places to facilitate proof.
        * libgnat/s-aridou.ads: Add full functional contracts.
        * libgnat/s-arit64.adb: Mark in SPARK.
        * libgnat/s-arit64.ads: Add contracts similar to those from
        s-aridou.ads.
        * rtsfind.ads: Document the limitation that runtime units
        loading does not work for private with-clauses.

2021-11-10  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Make_Eq_Body): Adapt call to
        Expand_Record_Equality.
        * exp_ch4.ads, exp_ch4.adb (Expand_Composite_Equality): Remove
        Bodies parameter; adapt comment; fix style in body; adapt calls
        to Expand_Record_Equality.
        (Expand_Array_Equality): Adapt calls to
        Expand_Composite_Equality.
        (Expand_Record_Equality): Remove Bodies parameter; adapt
        comment; adapt call to Expand_Composite_Equality.
        * exp_ch8.adb (Build_Body_For_Renaming): Adapt call to
        Expand_Record_Equality.

2021-11-10  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Expand_Composite_Equality): Handle arrays inside
        records just like scalars; only records inside records need
        dedicated handling.

2021-11-10  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_type.ads (Has_Compatible_Type): Add For_Comparison parameter.
        * sem_type.adb (Has_Compatible_Type): Put back the reversed calls
        to Covers guarded with For_Comparison.
        * sem_ch4.adb (Analyze_Membership_Op) <Try_One_Interp>: Remove new
        reversed call to Covers and set For_Comparison to true instead.
        (Find_Comparison_Types) <Try_One_Interp>: Likewise
        (Find_Equality_Types) <Try_One_Interp>: Likewise.

2021-11-10  Yannick Moy  <moy@adacore.com>

        * Makefile.rtl: Add unit.
        * libgnat/a-nbnbin__ghost.adb: Move...
        * libgnat/a-nbnbig.adb: ... here. Mark ghost as ignored.
        * libgnat/a-nbnbin__ghost.ads: Move...
        * libgnat/a-nbnbig.ads: ... here.  Add comment for purpose of
        this unit. Mark ghost as ignored.
        * libgnat/s-widthu.adb: Use new unit.
        * sem_aux.adb (First_Subtype): Adapt to the case of a ghost type
        whose freeze node is rewritten to a null statement.

2021-11-10  Etienne Servais  <servais@adacore.com>

        * libgnat/s-regexp.adb (Check_Well_Formed_Pattern): Fix
        Constraint_Error on missing close bracket.

2021-11-10  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Expand_Array_Equality): Remove check of the array
        bound being an N_Range node; use Type_High_Bound/Type_Low_Bound,
        which handle all kinds of array bounds.

2021-11-10  Etienne Servais  <servais@adacore.com>

        * sem_ch3.adb (Derived_Type_Declaration): Introduce a subprogram
        for tree transformation. If a tree transformation is performed,
        then warn that it would be better to reorder the interfaces.

2021-11-10  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_ch4.adb (Find_Non_Universal_Interpretations): Add guard.

2021-11-10  Yannick Moy  <moy@adacore.com>

        * par-ch4.adb (P_Primary): Adapt test for getting error message
        on missing parentheses.

2021-11-09  Ghjuvan Lacambre  <lacambre@adacore.com>

        * freeze.adb (Check_Inherited_Conditions): Initialize
        Ifaces_List.

2021-11-09  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_ch4.adb (Analyze_Membership_Op) <Find_Interpretation>: Handle
        both overloaded and non-overloaded cases.
        <Try_One_Interp>: Do a reversed call to Covers if the outcome of the
        call to Has_Compatible_Type is false.
        Simplify implementation after change to Find_Interpretation.
        (Analyze_User_Defined_Binary_Op): Be prepared for previous errors.
        (Find_Comparison_Types) <Try_One_Interp>: Do a reversed call to
        Covers if the outcome of the call to Has_Compatible_Type is false.
        (Find_Equality_Types) <Try_One_Interp>: Likewise.
        * sem_type.adb (Has_Compatible_Type): Remove the reversed calls to
        Covers.  Add explicit return on all paths.

2021-11-09  Justin Squirek  <squirek@adacore.com>

        * gnatls.adb (Initialize_Default_Project_Path): Remove early
        abort on invalid path.

2021-11-09  Eric Botcazou  <ebotcazou@adacore.com>

        * sprint.adb (Sprint_Node_Actual) <N_Allocator>: Also print the
        Procedure_To_Call field if it is present.
        <N_Extended_Return_Statement>: Also print the Storage_Pool and
        Procedure_To_Call fields if they are present.
        <N_Free_Statement>: Likewise.
        <N_Simple_Return_Statement>: Likewise.

2021-11-09  Patrick Bernardi  <bernardi@adacore.com>

        * libgnarl/s-tasini.adb (Check_Abort_Status): Don't return 1 if
        the task is aborting.
        * libgnarl/s-tasini.ads (Check_Abort_Status): Update comment.

2021-11-09  Patrick Bernardi  <bernardi@adacore.com>

        * Makefile.rtl: Add ATOMICS_TARGET_PAIRS and
        ATOMICS_BUILTINS_TARGET_PAIRS to LIBGNAT_TARGET_PAIRS for
        aarch64-rtems.

2021-11-09  Justin Squirek  <squirek@adacore.com>

        * exp_util.adb (Ancestor_Primitive): Prevent return of an
        subprogram alias when the ancestor primitive of the alias is the
        same as Subp.

2021-11-09  Justin Squirek  <squirek@adacore.com>

        * exp_ch4.adb (Tagged_Membership): Use corresponding record type
        when expanding a tagged membership test on protected types.

2021-11-09  Alexandre Oliva  <oliva@adacore.com>

        * strub.adb, strub.ads: New files.
        * exp_attr.adb (Access_Cases): Copy strub mode to subprogram type.
        * exp_disp.adb (Expand_Dispatching_Call): Likewise.
        * freeze.adb (Check_Inherited_Conditions): Check that strub modes
        match overridden subprograms and interfaces.
        (Freeze_All): Renaming declarations too.
        * sem_attr.adb (Resolve_Attribute): Reject 'Access to
        strub-annotated data object.
        * sem_ch3.adb (Derive_Subprogram): Copy strub mode to
        inherited subprogram.
        * sem_prag.adb (Analyze_Pragma): Propagate Strub Machine_Attribute
        from access-to-subprogram to subprogram type when required,
        but not from access-to-data to data type.  Mark the entity that
        got the pragma as having a gigi rep item.
        * sem_res.adb (Resolve): Reject implicit conversions that
        would change strub modes.
        (Resolve_Type_Conversions): Reject checked conversions
        between incompatible strub modes.
        * doc/gnat_rm/security_hardening_features.rst: Update.
        * gnat_rm.texi: Regenerate.
        * libgnat/a-except.ads (Raise_Exception): Revert strub-callable
        annotation in public subprogram.
        * libgnat/s-arit128.ads (Multiply_With_Ovflo_Check128): Likewise.
        * libgnat/s-arit64.ads (Multiply_With_Ovflo_Check64): Likewise.
        * libgnat/s-secsta.ads (SS_Allocate): Likewise.
        (SS_Mark, SS_Release): Likewise.
        * gcc-interface/Make-lang.in (GNAT_ADA_OBJS): Add ada/strub.o.

2021-11-09  Etienne Servais  <servais@adacore.com>

        * sinput.ads: Initialize Current_Source_Unit to No_Unit.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * Makefile.rtl (ARM and Aarch64 VxWorks): Use atomic variants of
        runtime units.
        * libgnat/a-strunb__shared.ads: Mention AARCH64 and ARM as
        supported.
        * libgnat/s-atocou.ads: Likewise.

2021-11-09  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_util.adb (Accessibility_Level): Use init_proc_level_formal
        instead of computing a new accessibility level from Scope_Depth
        (E).

2021-11-09  Johannes Kliemann  <kliemann@adacore.com>

        * vxworks7-cert-rtp-link.spec: Replace the definition of
        __wrs_rtp_base with the base_link spec.
        * vxworks7-cert-rtp-base-link.spec: Add base_link spec with
        __wrs_rtp_base definition for all architectures.
        * vxworks7-cert-rtp-base-link__ppc64.spec: Add base_link spec
        with __wrs_rtp_base definition for ppc64.
        * vxworks7-cert-rtp-base-link__x86.spec: Add base_link spec with
        __wrs_rtp_base definition for x86.
        * vxworks7-cert-rtp-base-link__x86_64.spec: Add base_link spec
        with __wrs_rtp_base definition for x86_64.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Copy_Parameter_List): Refactor to remove
        repeated calls to First_Formal.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch8.adb (Build_Body_For_Renaming): Remove unnecessary
        calls to Sloc; set Handled_Statement_Sequence when building
        subprogram body; whitespace cleanup.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Handle_One_Dimension): Parameter N must be always
        positive, because it is translated into expression of 'First and
        'Last.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * tbuild.adb (New_Occurrence_Of): Simplify by reusing
        Make_Identifier.

2021-11-09  Etienne Servais  <servais@adacore.com>

        * scng.adb (Set_Start_Column): Return Column_Number'Last when
        handling Constraint_Error. Plus reformat a strangely 7 level if
        loop.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Test_Empty_Arrays): Simplify with Evolve_Or_Else;
        remove unnecessary call to Relocate_Node.
        (Test_Lengths_Correspond): Likewise.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-strunb.adb (Deallocate): Rename Reference_Copy to
        Old, to make the code similar to other routines in this package.
        (Realloc_For_Chunk): Use a temporary, deallocate the previous
        string using a null-allowing copy of the string reference.

2021-11-09  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_util.adb (Accessibility_Level): Fix typos.

2021-11-09  Tom Tromey  <tromey@adacore.com>

        * doc/gnat_ugn/platform_specific_information.rst: Document the
        SuSE kernel bug.
        * gnat_ugn.texi: Regenerate.

2021-11-09  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch13.adb (Freeze_Entity_Checks): Analyze the expression of
        a pragma Predicate associated with an aspect at the freeze point
        of the type, to ensure that references to globals get saved when
        the aspect occurs within a generic body. Also, add
        Aspect_Static_Predicate to the choices of the membership test of
        the enclosing guard.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Arr_Attr): Refine type of the parameter from Int
        to Pos; refine name of the parameter from Num to Dim; fix
        reference to "Expr" in comment.

2021-11-09  Steve Baird  <baird@adacore.com>

        * libgnat/s-regexp.adb (Compile.Check_Well_Formed_Patern): When
        a "|" operator is encountered in a pattern, check that it is not
        the last character of the pattern.

2021-11-09  Yannick Moy  <moy@adacore.com>

        * sem_ch3.adb (Analyze_Subtype_Declaration,
        Derived_Type_Declaration): Initialize list of primitive
        operations when Extensions_Allowed.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * checks.adb (Apply_Constraint_Check): Guard against calling
        Choices when the first association in an array aggregate is a
        N_Iterated_Component_Association node.

2021-11-09  Yannick Moy  <moy@adacore.com>

        * sem_ch3.adb (Analyze_Incomplete_Type_Decl): Add the missing
        initialization.

2021-11-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Check_Usage): Guard against calling Usage_Error
        with illegal Item_Id. The intention to do this was already
        described in the comment but not implemented.

2021-11-09  Etienne Servais  <servais@adacore.com>

        * exp_ch6.adb (Expand_Actuals): Add a condition to check for the
        possibility of task.

2021-11-05  Iain Sandoe  <iain@sandoe.co.uk>

        * gcc-interface/Make-lang.in: Use iOS signal trampoline code
        for hosted Ada tools.
        * sigtramp-ios.c: Wrap the declarations in extern "C" when
        the code is built by a C++ compiler.

2021-10-30  Alexandre Oliva  <oliva@adacore.com>

        * doc/gnat_rm/security_hardening_features.rst: Mention
        optimization to operations with implied compares.

2021-10-28  Alexandre Oliva  <oliva@adacore.com>

        * doc/gnat_rm/security_hardening_features.rst
        (Hardened Conditionals): New.

2021-10-25  Arnaud Charlet  <charlet@adacore.com>

        * gcc-interface/Make-lang.in, gcc-interface/Makefile.in: Remove
        gnatfind and gnatxref.

2021-10-25  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch4.adb (Has_Possible_Literal_Aspects): If analysis of an
        operator node fails to find  a possible interpretation, and one
        of its operands is a literal or a named number, assign to the
        node the corresponding class type (Any_Integer, Any_String,
        etc).
        (Operator_Check): Call it before emitting a type error.
        * sem_res.adb (Has_Applicable_User_Defined_Literal): Given a
        literal and a type, determine whether the type has a
        user_defined aspect that can apply to the literal, and rewrite
        the node as call to the corresponding function. Most of the code
        was previously in procedure Resolve.
        (Try_User_Defined_Literal): Check operands of a predefined
        operator that fails to resolve, and apply
        Has_Applicable_User_Defined_Literal to literal operands if any,
        to find if a conversion will allow the operator to resolve
        properly.
        (Resolve): Call the above when a literal or an operator with a
        literal operand fails to resolve.

2021-10-25  Bob Duff  <duff@adacore.com>

        * freeze.adb (Freeze_Fixed_Point_Type): Remove
        previously-inserted test for Uint_0; no longer needed.
        * gen_il-gen.ads: Improve comments.
        * repinfo.adb (Rep_Value): Use Ubool type for B.
        * repinfo.ads (Node_Ref): Use Unegative type.
        (Node_Ref_Or_Val): Document that values of this type can be
        No_Uint.
        * exp_disp.adb (Make_Disp_Requeue_Body): Minor comment fix.
        * sem_ch3.adb: Likewise.
        * sem_ch8.adb: Likewise.
        * sinfo-utils.adb (End_Location): End_Span can never be No_Uint,
        so remove the "if No (L)" test.
        * uintp.adb (Image_String): Use "for ... of" loop.
        * uintp.ads (Unegative): New type for negative integers.  We
        give it a long name (unlike Unat and Upos) because it is rarely
        used.

2021-10-25  Etienne Servais  <servais@adacore.com>

        * errout.adb (Skip_Msg_Insertion_Warning): Adapt and format as
        Erroutc.Prescan_Message.Parse_Message_Class.
        (Warn_Insertion): Adapt to new format.
        * errout.ads: Update documentation.
        * erroutc.adb (Get_Warning_Tag): Adapt to new format.
        (Prescan_Message): Introduce Parse_Message_Class function.
        (Validate_Specific_Warnings): Update ?W? to ?.w?.
        * erroutc.ads: Update type and documentation.
        * checks.adb (Validity_Check_Range): Update ?X? to ?.x?.
        * exp_ch11.adb (Possible_Local_Raise): Update ?X? to ?.x?.
        (Warn_If_No_Local_Raise): Likewise.
        (Warn_If_No_Propagation): Likewise.
        (Warn_No_Exception_Propagation_Active): Likewise.
        * exp_ch4.adb (Expand_N_Allocator): Attach warning message to
        -gnatw_a.
        * exp_prag.adb (Expand_Pragma_Check): Update ?A? to ?.a?.
        * exp_util.adb (Activate_Atomic_Synchronization): Update ?N? to
        ?.n?.
        (Add_Invariant_Check): Update ?L? to ?.l?.
        * freeze.adb (Check_Suspicious_Modulus): Update ?M? to ?.m?.
        (Freeze_Entity): Update ?T? to ?.t?, ?Z? to ?.z?.
        * par-util.adb (Warn_If_Standard_Redefinition): Update ?K? to
        ?.k?.
        * sem_attr.adb (Min_Max): Update ?U? to ?.u?.
        * sem_ch13.adb (Adjust_Record_For_Reverse_Bit_Order): Update ?V?
        to ?.v?.
        (Adjust_Record_For_Reverse_Bit_Order_Ada_95): Update ?V? to ?.v?.
        (Component_Size_Case): Update ?S? to ?.s?.
        (Analyze_Record_Representation_Clause): Update ?S? to ?.s? and
        ?C? to ?.c?.
        (Add_Call): Update ?L? to ?.l?.
        (Component_Order_Check): Attach warning message to -gnatw_r.
        (Check_Component_List): Update ?H? to ?.h?.
        (Set_Biased): Update ?B? to ?.b?.
        * sem_ch3.adb (Modular_Type_Declaration): Update ?M? to ?.m?.
        * sem_ch4.adb (Analyze_Mod): Update ?M? to ?.m?.
        (Analyze_Quantified_Expression): Update ?T? to ?.t?.
        * sem_ch6.adb (Check_Conformance): Attach warning message to
        -gnatw_p.
        (List_Inherited_Pre_Post_Aspects): Update ?L? to ?.l?.
        * sem_ch7.adb (Unit_Requires_Body_Info): Update ?Y? to ?.y?.
        * sem_ch8.adb (Analyze_Object_Renaming): Update ?R? to ?.r?.
        * sem_prag.adb (Validate_Compile_Time_Warning_Or_Error): Attach
        warning message to -gnatw_c.
        * sem_res.adb (Check_Argument_Order): Update ?P? to ?.p?.
        (Resolve_Comparison_Op): Update ?U? to ?.u?.
        (Resolve_Range): Update ?U? to ?.u?.
        (Resolve_Short_Circuit): Update ?A? to ?.a?.
        (Resolve_Unary_Op): Update ?M? to ?.m?.
        * sem_util.adb (Check_Result_And_Post_State): Update ?T? to ?.t?.
        * sem_warn.adb (Output_Unused_Warnings_Off_Warnings): Update ?W?
        to ?.w?.
        * warnsw.ads: Update documentation for -gnatw_c.

2021-10-25  Bob Duff  <duff@adacore.com>

        * inline.adb (Establish_Actual_Mapping_For_Inlined_Call): Fix
        comment.

2021-10-25  Bob Duff  <duff@adacore.com>

        * gen_il-gen.adb (Put_Seinfo): Generate type
        Seinfo.Type_Only_Enum based on type
        Gen_IL.Internals.Type_Only_Enum. Automatically generating a copy
        of the type will help keep them in sync.  (Note that there are
        no Ada compiler packages imported into Gen_IL.)  Add a Type_Only
        field to Field_Descriptor, so this information is available in
        the Ada compiler (as opposed to just in the Gen_IL "compiler").
        (One_Comp): Add initialization of the Type_Only field of
        Field_Descriptor.
        * gen_il-internals.ads (Image): Image function for
        Type_Only_Enum.
        * atree.ads (Node_To_Fetch_From): New function to compute which
        node to fetch from, based on the Type_Only aspect.
        * atree.adb (Get_Field_Value): Call Node_To_Fetch_From.
        * treepr.adb (Print_Entity_Field): Call Node_To_Fetch_From.
        (Print_Node_Field): Assert.
        * sinfo-utils.adb (Walk_Sinfo_Fields,
        Walk_Sinfo_Fields_Pairwise): Asserts.

2021-10-25  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Expand_Composite_Equality): Fix style.
        (Element_To_Compare): Simplify loop.
        (Expand_Record_Equality): Adapt calls to Element_To_Compare.

2021-10-25  Steve Baird  <baird@adacore.com>

        * sem_case.adb (Composite_Case_Ops.Box_Value_Required): A new
        function which takes a component type and returns a Boolean.
        Returns True for the cases which were formerly forbidden as
        components (these checks were formerly performed in the
        now-deleted procedure
        Check_Composite_Case_Selector.Check_Component_Subtype).
        (Composite_Case_Ops.Normalized_Case_Expr_Type): Hoist this
        function out of the Array_Case_Ops package because it has been
        generalized to also do the analogous thing in the case of a
        discriminated type.
        (Composite_Case_Ops.Scalar_Part_Count): Return 0 if
        Box_Value_Required returns True for the given type/subtype.
        (Composite_Case_Ops.Choice_Analysis.Choice_Analysis.Component_Bounds_Info.
        Traverse_Discrete_Parts): Return without doing anything if
        Box_Value_Required returns True for the given type/subtype.
        (Composite_Case_Ops.Choice_Analysis.Parse_Choice.Traverse_Choice):
        If Box_Value_Required yields True for a given component type,
        then check that the value of that component in a choice
        expression is indeed a box (in which case the component is
        ignored).
        * doc/gnat_rm/implementation_defined_pragmas.rst: Update
        documentation.
        * gnat_rm.texi: Regenerate.

2021-10-25  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-nbnbin__gmp.adb (From_String): Fix predicate
        mismatch between subprogram declaration and body.

2021-10-25  Bob Duff  <duff@adacore.com>

        * einfo-utils.adb (Declaration_Node): Avoid returning the
        following node kinds: N_Assignment_Statement, N_Integer_Literal,
        N_Procedure_Call_Statement, N_Subtype_Indication, and
        N_Type_Conversion.  Assert that the result is in N_Is_Decl or
        empty.
        * gen_il-gen-gen_nodes.adb (N_Is_Decl): Modify to match the
        things that Declaration_Node can return.

2021-10-25  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-strsup.ads (Super_Length, Super_Element,
        Super_Slice): Add Global contracts.

2021-10-25  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Predefined_Primitive_Bodies): Simplify detection
        of existing equality operator.

2021-10-25  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Predefined_Primitive_Bodies): Remove redundant
        conditions related to interface types.

2021-10-25  Piotr Trojanek  <trojanek@adacore.com>

        * adaint.c (__gnat_portable_spawn): Do not expect execv to
        return 0.
        (__gnat_portable_no_block_spawn): Likewise.

2021-10-25  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_ch8.adb (Analyze_Subprogram_Renaming): Set New_S to Empty.

2021-10-25  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-strunb.ads (Unbounded_String): Reference is never
        null.
        * libgnat/a-strunb.adb (Finalize): Copy reference while it needs
        to be deallocated.

2021-10-25  Piotr Trojanek  <trojanek@adacore.com>

        * lib-xref.adb (Get_Through_Renamings): Exit loop when an
        enumeration literal is found.

2021-10-25  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/s-widthu.adb: Add pragma Annotate.

2021-10-25  Javier Miranda  <miranda@adacore.com>

        * sem_ch8.adb (Build_Class_Wide_Wrapper): Previous version split
        in two subprograms to factorize its functionality:
        Find_Suitable_Candidate, and Build_Class_Wide_Wrapper. These
        routines are also placed in the new subprogram
        Handle_Instance_With_Class_Wide_Type.
        (Handle_Instance_With_Class_Wide_Type): New subprogram that
        encapsulates all the code that handles instantiations with
        class-wide types.
        (Analyze_Subprogram_Renaming): Adjust code to invoke the new
        nested subprogram Handle_Instance_With_Class_Wide_Type; adjust
        documentation.

2021-10-25  Bob Duff  <duff@adacore.com>

        * einfo-utils.ads, einfo-utils.adb (Alias, Set_Alias,
        Renamed_Entity, Set_Renamed_Entity, Renamed_Object,
        Set_Renamed_Object): Add assertions that reflect how these are
        supposed to be used and what they are supposed to return.
        (Renamed_Entity_Or_Object): New getter.
        (Set_Renamed_Object_Of_Possibly_Void): Setter that allows N to
        be E_Void.
        * checks.adb (Ensure_Valid): Use Renamed_Entity_Or_Object
        because this is called for both cases.
        * exp_dbug.adb (Debug_Renaming_Declaration): Use
        Renamed_Entity_Or_Object because this is called for both cases.
        Add assertions.
        * exp_util.adb (Possible_Bit_Aligned_Component): Likewise.
        * freeze.adb (Freeze_All_Ent): Likewise.
        * sem_ch5.adb (Within_Function): Likewise.
        * exp_attr.adb (Calculate_Header_Size): Call Renamed_Entity
        instead of Renamed_Object.
        * exp_ch11.adb (Expand_N_Raise_Statement): Likewise.
        * repinfo.adb (Find_Declaration): Likewise.
        * sem_ch10.adb (Same_Unit, Process_Spec_Clauses,
        Analyze_With_Clause, Install_Parents): Likewise.
        * sem_ch12.adb (Build_Local_Package, Needs_Body_Instantiated,
        Build_Subprogram_Renaming, Check_Formal_Package_Instance,
        Check_Generic_Actuals, In_Enclosing_Instance,
        Denotes_Formal_Package, Process_Nested_Formal,
        Check_Initialized_Types, Map_Formal_Package_Entities,
        Restore_Nested_Formal): Likewise.
        * sem_ch6.adb (Report_Conflict): Likewise.
        * sem_ch8.adb (Analyze_Exception_Renaming,
        Analyze_Generic_Renaming, Analyze_Package_Renaming,
        Is_Primitive_Operator_In_Use, Declared_In_Actual,
        Note_Redundant_Use): Likewise.
        * sem_warn.adb (Find_Package_Renaming): Likewise.
        * sem_elab.adb (Ultimate_Variable): Call Renamed_Object instead
        of Renamed_Entity.
        * exp_ch6.adb (Get_Function_Id): Call
        Set_Renamed_Object_Of_Possibly_Void, because the defining
        identifer is still E_Void at this point.
        * sem_util.adb (Function_Call_Or_Allocator_Level): Likewise.
        Remove redundant (unreachable) code.
        (Is_Object_Renaming, Is_Valid_Renaming): Call Renamed_Object
        instead of Renamed_Entity.
        (Get_Fullest_View): Call Renamed_Entity instead of
        Renamed_Object.
        (Copy_Node_With_Replacement): Call
        Set_Renamed_Object_Of_Possibly_Void because the defining entity
        is sometimes E_Void.
        * exp_ch5.adb (Expand_N_Assignment_Statement): Protect a call to
        Renamed_Object with Is_Object to avoid assertion failure.
        * einfo.ads: Minor comment fixes.
        * inline.adb: Minor comment fixes.
        * tbuild.ads: Minor comment fixes.

2021-10-25  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch13.adb (Build_Discrete_Static_Predicate): Remove use of
        exception propagation since this code is exercised during the
        bootstrap.

2021-10-25  Yannick Moy  <moy@adacore.com>

        * sem_ch13.adb (Freeze_Entity_Checks): Perform same check on
        predicate expression inside pragma as inside aspect.
        * sem_util.adb (Is_Current_Instance): Recognize possible
        occurrence of subtype as current instance inside the pragma
        Predicate.

2021-10-25  Ghjuvan Lacambre  <lacambre@adacore.com>

        * erroutc.adb (Count_Compile_Time_Pragma_Warnings): Don't count
        deleted warnings.

2021-10-22  Eric Gallager  <egallager@gcc.gnu.org>

        PR other/102663
        * gcc-interface/Make-lang.in: Allow dvi-formatted
        documentation to be installed.

2021-10-20  Bob Duff  <duff@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity): Remove unnecessary
        call to No_Uint_To_0.

2021-10-20  Richard Kenner  <kenner@adacore.com>

        * exp_unst.adb (Visit_Node, when N_Subprogram_Call): Never treat
        instrinsic subprograms as nested.

2021-10-20  Yannick Moy  <moy@adacore.com>

        * libgnat/s-widlllu.ads: Mark in SPARK.
        * libgnat/s-widllu.ads: Likewise.
        * libgnat/s-widuns.ads: Likewise.
        * libgnat/s-widthu.adb: Add ghost code and a
        pseudo-postcondition.

2021-10-20  Yannick Moy  <moy@adacore.com>

        * libgnat/a-nbnbin__ghost.adb (Signed_Conversions,
        Unsigned_Conversions): Mark subprograms as not imported.
        * libgnat/a-nbnbin__ghost.ads: Provide a dummy body.

2021-10-20  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_eval.adb (Eval_Type_Conversion): If the target subtype is
        a static floating-point subtype and the result is a real literal,
        consider its machine-rounded value to raise Constraint_Error.
        (Test_In_Range): Turn local variables into constants.

2021-10-20  Doug Rupp  <rupp@adacore.com>

        * libgnat/g-io-put__vxworks.adb: Remove (unused)
        * libgnat/s-parame__ae653.ads: Likewise.
        * libgnat/s-thread.ads: Likewise.
        * libgnat/s-thread__ae653.adb: Likewise.

2021-10-20  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_eval.ads (Machine_Number): New inline function.
        * sem_eval.adb (Machine_Number): New function body implementing
        the machine rounding operation specified by RM 4.9(38/2).
        (Check_Non_Static_Context): Call Machine_Number and set the
        Is_Machine_Number flag consistently on the resulting node.
        * sem_attr.adb (Eval_Attribute) <Attribute_Machine>: Likewise.
        * checks.adb (Apply_Float_Conversion_Check): Call Machine_Number.
        (Round_Machine): Likewise.

2021-10-20  Johannes Kliemann  <kliemann@adacore.com>

        * vxworks7-cert-rtp-link.spec: Add the definition of
        __wrs_rtp_base.

2021-10-20  Piotr Trojanek  <trojanek@adacore.com>

        * sem_aggr.adb (Resolve_Delta_Record_Aggregate): Reject boxes in
        record delta aggregates.

2021-10-20  Justin Squirek  <squirek@adacore.com>

        * sem_ch6.adb (Check_Return_Construct_Accessibility): Modify
        generation of accessibility checks to be more consolidated and
        get triggered properly in required cases.
        * sem_util.adb (Accessibility_Level): Add extra check within
        condition to handle aliased formals properly in more cases.

2021-10-20  Justin Squirek  <squirek@adacore.com>

        * exp_ch7.adb (Make_Final_Call): Detect expanded protected types
        and use original protected type in order to calculate
        appropriate finalization routine.

2021-10-20  Johannes Kliemann  <kliemann@adacore.com>

        * libgnat/a-nbnbin__ghost.ads: Add ghost package.

2021-10-20  Piotr Trojanek  <trojanek@adacore.com>

        * sem_aggr.adb (Variant_Depth): Refine type from Integer to
        Natural.

2021-10-20  Bob Duff  <duff@adacore.com>

        * atree.ads: Comment improvements. How is a "completely new
        node" different from a "new node"? Document default values
        corresponding to field types.
        * exp_ch7.adb (Process_Tagged_Type_Declaration): Use
        higher-level Scope_Depth instead of Scope_Depth_Value.  Remove
        confusing comment: not clear what a "true" library level package
        is.
        * uintp.adb (Image_Out): Print No_Uint in a more readable way.
        * gen_il-gen.adb, gen_il-gen-gen_entities.adb,
        gen_il-gen-gen_nodes.adb, gen_il-types.ads: Tighten up the
        subtypes of fields whose type is Uint, where possible; use
        more-constrained subtypes such as Unat.
        * einfo-utils.adb, einfo-utils.ads, exp_attr.adb,
        exp_ch3.adb, exp_intr.adb, exp_unst.adb, exp_util.adb,
        freeze.adb, repinfo.adb, sem.adb, sem_ch12.adb, sem_ch13.adb,
        sem_ch3.adb, sem_ch8.adb, sem_util.adb, sprint.adb, treepr.adb:
        No longer use Uint_0 to indicate "unknown" or "not yet known"
        for various fields whose type is Uint. Use No_Uint for that,
        except in a small number of legacy cases that cause test
        failures. Protect many queries of such fields with calls to
        Known_... functions. Improve comments.
        * exp_aggr.adb: Likewise.
        (Is_OK_Aggregate): Check whether Csiz is present.
        (Aggr_Assignment_OK_For_Backend): Ensure we do not access an
        uninitialized size.
        * exp_strm.adb (Build_Elementary_Input_Call,
        Build_Elementary_Write_Call): Check whether P_Size is present.
        * cstand.adb: Leave Component_Size of Any_Composite unknown.
        Similar for RM_Size of Standard_Exception_Type.  These should
        not be used.
        * einfo.ads: Comment improvements.
        * exp_disp.ads: Minor.
        * gen_il-internals.ads, gen_il-internals.adb: Minor.
        * sinfo-utils.adb: Take advantage of full-coverage rules.
        * types.h: Minor.

2021-10-20  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch6.adb: Add with and use of Warnsw.
        (Check_Conformance): Report a warning when subtypes or
        designated subtypes of formal parameters or result subtypes
        denote different declarations between the spec and body of the
        (Subprogram_Subtypes_Have_Same_Declaration): New function nested
        within Check_Conformance that determines whether two subtype
        entities referenced in a subprogram come from the same
        declaration. Returns True immediately if the subprogram is in a
        generic instantiation, or the subprogram is marked Is_Internal
        or is declared in an internal (GNAT library) unit, or GNAT_Mode
        is enabled, otherwise compares the nonlimited views of the
        entities (or their designated subtypes' nonlimited views in the
        anonymous access cases).
        (Nonlimited_View_Of_Subtype): New function nested within
        function Subprogram_Subtypes_Have_Same_Declaration that returns
        Non_Limited_View of a type or subtype that is an incomplete or
        class-wide type that comes from a limited of a
        package (From_Limited_With is True for the entity), or returns
        Full_View when the nonlimited view is an incomplete type.
        Otherwise returns the entity passed in.
        * warnsw.ads (Warn_On_Pedantic_Checks): New warning flag.
        (type Warning_Record): New component Warn_On_Pedantic_Checks.
        * warnsw.adb (All_Warnings): Set Warn_On_Pedantic_Checks from
        parameter Setting.
        (Restore_Warnings): Restore the value of the
        Warn_On_Pedantic_Checks flag.
        (Save_Warnings): Save the value of the Warn_On_Pedantic_Checks
        flag.
        (Set_Underscore_Warning_Switch): Add settings of the
        Warn_On_Pedantic flag according to the switch ("-gnatw_p" vs.
        "-gnatw_P").
        * doc/gnat_ugn/building_executable_programs_with_gnat.rst: Add
        documentation of new switches -gnatw_p and -gnatw_P (warnings
        for pedantic checks).
        * gnat_ugn.texi: Regenerate.
        * usage.adb: Add Warn_On_Pedantic_Checks.

2021-10-20  Piotr Trojanek  <trojanek@adacore.com>

        * exp_spark.adb (Expand_SPARK_N_Attribute_Reference): Guard
        against equality of an uninitialized RM_Size field.

2021-10-20  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_ch12.adb (Analyze_Subprogram_Instantiation): Also propagate an
        interface name on an intrinsic subprogram.  Remove obsolete comment.
        * libgnat/s-atopri.ads (Atomic_Load): New generic intrinsic function
        (Atomic_Load_8): Rewrite into instantiation.
        (Atomic_Load_16): Likewise.
        (Atomic_Load_32): Likewise.
        (Atomic_Load_64): Likewise.
        (Sync_Compare_And_Swap): New generic intrinsic function.
        (Sync_Compare_And_Swap_8): Rewrite into instantiation.
        (Sync_Compare_And_Swap_16): Likewise.
        (Sync_Compare_And_Swap_32): Likewise.
        (Sync_Compare_And_Swap_64): Likewise.
        (Lock_Free_Read): New generic inline function.
        (Lock_Free_Read_8): Rewrite into instantiation.
        (Lock_Free_Read_16): Likewise.
        (Lock_Free_Read_32): Likewise.
        (Lock_Free_Read_64): Likewise.
        (Lock_Free_Try_Write): New generic inline function.
        (Lock_Free_Try_Write_8): Rewrite into instantiation.
        (Lock_Free_Try_Write_16): Likewise.
        (Lock_Free_Try_Write_32): Likewise.
        (Lock_Free_Try_Write_64): Likewise.
        * libgnat/s-atopri.adb (Lock_Free_Read): New function body.
        (Lock_Free_Read_8): Delete.
        (Lock_Free_Read_16): Likewise.
        (Lock_Free_Read_32): Likewise.
        (Lock_Free_Read_64): Likewise.
        (Lock_Free_Try_Write): New function body.
        (Lock_Free_Try_Write_8): Delete.
        (Lock_Free_Try_Write_16): Likewise.
        (Lock_Free_Try_Write_32): Likewise.
        (Lock_Free_Try_Write_64): Likewise.
        * libgnat/s-aoinar.adb (Atomic_Fetch_And_Add): Use type-generic GCC
        atomic builtin and tidy up implementation.
        (Atomic_Fetch_And_Subtract): Likewise.
        * libgnat/s-aomoar.adb (Atomic_Fetch_And_Add): Likewise.
        (Atomic_Fetch_And_Subtract): Likewise.
        * libgnat/s-atopex.adb (Atomic_Exchange): Likewise.
        (Atomic_Compare_And_Exchange): Likewise.

2021-10-20  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <E_Subprogram_Type>:
        Replace test on Convention_Intrinsic with Is_Intrinsic_Subprogram.
        (gnat_to_gnu_param): Likewise.
        (gnat_to_gnu_subprog_type): Likewise.
        * gcc-interface/trans.c (elaborate_all_entities_for_package): Ditto.

2021-10-20  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_eval.ads (Check_Non_Static_Context): Update documentation.
        * sem_eval.adb (In_Any_Integer_Context): Change parameter type,
        adjust accordingly and remove unreachable case.
        (Eval_Integer_Literal): Consider the node kind throughout and
        trim down verbose condition.

2021-10-20  Doug Rupp  <rupp@adacore.com>

        * Makefile.rtl: Remove references to system-vxworks-ppc.ads
        and system-vxworks-x86.ads.
        * libgnat/system-vxworks-ppc.ads: Remove.
        * libgnat/system-vxworks-ppc-ravenscar.ads: Likewise.
        * libgnat/system-vxworks-x86.ads: Likewise.

2021-10-20  Yannick Moy  <moy@adacore.com>

        * sem_ch4.adb (Analyze_QUantified_Expression): Issue warning on
        conjunct/disjunct sub-expression of the full expression inside a
        quantified expression, when it does not reference the quantified
        variable.

2021-10-20  Marc Poulhiès  <poulhies@adacore.com>

        * checks.adb (Insert_Valid_Check): in case of checked type
        conversion, update Typ to match Exp's type and add call to
        Analyze_And_Resolve.

2021-10-20  Arnaud Charlet  <charlet@adacore.com>

        PR ada/100486
        * sem_prag.adb (Check_Valid_Library_Unit_Pragma): Do not raise an
        exception as part of the bootstrap.

2021-10-15  Richard Biener  <rguenther@suse.de>

        * gcc-interface/misc.c (gnat_post_options): Do not warn
        about DBX_DEBUG use here.

2021-10-14  Alexandre Oliva  <oliva@adacore.com>

        * par-ch10.adb (P_Compilation_Unit): Reenable ada83 library
        unit renaming test and error.

2021-10-11  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/gigi.h (resolve_atomic_size): Declare.
        (list_third): New inline function.
        * gcc-interface/decl.c (type_for_atomic_builtin_p): New function.
        (resolve_atomic_builtin): Likewise.
        (gnat_to_gnu_subprog_type): Perform type resolution for most of
        type-generic GCC atomic builtins and give an error for the rest.
        * gcc-interface/utils2.c (resolve_atomic_size): Make public.

2021-10-11  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (gnat_to_gnu) <N_Pop_Constraint_Error_Label>:
        Given the warning only if No_Exception_Propagation is active.
        <N_Pop_Storage_Error_Label>: Likewise.
        <N_Pop_Program_Error_Label>: Likewise.

2021-10-11  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (promote_object_alignment): Add GNU_SIZE
        parameter and use it for the size of the object if not null.
        (gnat_to_gnu_entity) <E_Variable>: Perform the automatic alignment
        promotion for objects whose nominal subtype is of variable size.
        (gnat_to_gnu_field): Adjust call to promote_object_alignment.

2021-10-11  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_param): Strip padding types
        only if the size does not change in the process.  Rename local
        variable and add bypass for initialization procedures.

2021-10-11  Doug Rupp  <rupp@adacore.com>

        * libgnat/s-thread.ads: Fix comments.  Remove unused package
        imports.
        (Thread_Body_Exception_Exit): Remove Exception_Occurrence
        parameter.
        (ATSD): Declare type locally.
        * libgnat/s-thread__ae653.adb: Fix comments.  Remove unused
        package imports.  Remove package references to Stack_Limit
        checking.
        (Install_Handler): Remove.
        (Set_Sec_Stack): Likewise.
        (Thread_Body_Enter): Remove calls to Install_Handler and
        Stack_Limit checking.
        (Thread_Body_Exception_Exit): Remove Exception_Occurrence
        parameter.
        (Init_RTS): Call local Get_Sec_Stack.  Remove call to
        Install_Handler.  Remove references to accessors for
        Get_Sec_Stack and Set_Sec_Stack.  Remove OS check.
        (Set_Sec_Stack): Remove.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Make_Predefined_Primitive_Specs,
        Predefined_Primitive_Bodies): Remove guard with restriction
        No_Dispatching_Calls.

2021-10-11  Steve Baird  <baird@adacore.com>

        * sem_attr.adb (Analyze_Attribute_Old_Result): Permit an
        attribute reference inside a compiler-generated _Postconditions
        procedure. In this case, Subp_Decl is assigned the declaration
        of the enclosing subprogram.
        * exp_util.adb (Insert_Actions): When climbing up the tree
        looking for an insertion point, do not climb past an
        N_Iterated_Component/Element_Association, since this could
        result in inserting a reference to a loop parameter at a
        location outside of the scope of that loop parameter. On the
        other hand, be careful to preserve existing behavior in the case
        of an N_Component_Association node.

2021-10-11  Steve Baird  <baird@adacore.com>

        * exp_ch6.adb (Can_Fold_Predicate_Call): Do not attempt folding
        if there is more than one predicate involved. Recall that
        predicate aspect specification are additive, not overriding, and
        that there are three different predicate
        aspects (Dynamic_Predicate, Static_Predicate, and the
        GNAT-defined Predicate aspect). These various ways of
        introducing multiple predicates are all checked for.  A new
        nested function, Augments_Other_Dynamic_Predicate, is
        introduced.
        * sem_ch4.adb
        (Analyze_Indexed_Component_Form.Process_Function_Call): When
        determining whether a name like "X (Some_Discrete_Type)" might
        be interpreted as a slice, the answer should be "no" if the
        type/subtype name denotes the current instance of type/subtype.

2021-10-11  Patrick Bernardi  <bernardi@adacore.com>

        * libgnarl/s-osinte__rtems.ads: Change sigset_t to an unsigned
        long.

2021-10-11  Patrick Bernardi  <bernardi@adacore.com>

        * libgnat/s-parame__rtems.adb: use
        _POSIX_Threads_Minimum_stack_size instead of
        ada_pthread_minimum_stack_size.

2021-10-11  Eric Botcazou  <ebotcazou@adacore.com>

        * fe.h (No_Exception_Propagation_Active): Declare.
        * restrict.ads (No_Exception_Propagation_Active): Add WARNING line.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch13.adb (Validate_Unchecked_Conversion): Simplify code
        for detecting conversions with Ada.Calendar.Time type and extend
        it to similar types in the Ada.Real_Time package.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch10.adb, sem_prag.adb, sem_util.adb: Use
        N_Generic_Declaration in membership tests.

2021-10-11  Etienne Servais  <servais@adacore.com>

        * ali.adb (Get_Name): Ignore_Spaces is always False.
        * bindo-graphs.adb (Set_Is_Existing_Source_Target_Relation): Val
        is always True.
        * cstand.adb (New_Standard_Entity): New_Node_Kind is always
        N_Defininig_Identifier.
        * exp_ch3.adb (Predef_Stream_Attr_Spec): For_Body is always
        False.
        * exp_dist.adb (Add_Parameter_To_NVList): RACW_Ctrl is always
        False.
        * gnatls.adb (Add_Directories): Prepend is always False.
        * sem_ch10.adb, sem_ch10.ads (Load_Needed_Body): Do_Analyze is
        always True.
        * sem_ch3.adb, sem_ch3.ads (Process_Range_Expr_In_Decl):
        R_Check_Off is always False.
        * sem_elab.adb: (Info_Variable_Reference): Info_Msg is always
        False, In_SPARK is always True.
        (Set_Is_Traversed_Body, Set_Is_Saved_Construct,
        Set_Is_Saved_Relation): Val is always True.
        * treepr.adb (Visit_Descendant): No_Indent is always False.
        (Print_Node): Fmt does not need such a big scope.

2021-10-11  Etienne Servais  <servais@adacore.com>

        * sem_ch4.adb (Analyze_Membership_Op): Finds interpretation for
        the case of a membership test with a singleton value in case of
        overloading.

2021-10-11  Patrick Bernardi  <bernardi@adacore.com>

        * Makefile.rtl (VxWorks): Rename s-inmaop__vxworks.adb to
        s-inmaop__hwint.adb.
        (RTEMS): Use s-inmaop__hwint.adb, s-intman__rtems.adb/s,
        s-taprop__rtems.adb.
        * libgnarl/a-intnam__rtems.ads: Remove signals definitions and
        replace with Hardware_Interrupts.
        * libgnarl/s-inmaop__vxworks.adb: Rename as...
        * libgnarl/s-inmaop__hwint.adb: ... this.
        * libgnarl/s-interr__hwint.adb: Remove unnecessary comments.
        * libgnarl/s-intman__rtems.ads, libgnarl/s-intman__rtems.adb:
        New files.
        * libgnarl/s-osinte__rtems.adb: Add RTEMS API bindings.
        (Binary_Semaphore_Create, Binary_Semaphore_Delete,
        Binary_Semaphore_Obtain, Binary_Semaphore_Release,
        Binary_Semaphore_Flush, Interrupt_Connect,
        Interrupt_Number_To_Vector): New functions.
        * libgnarl/s-osinte__rtems.ads (Num_HW_Interrupts, Signal):
        Removed.
        (NSIG, Interrupt_Range): New.
        (Binary_Semaphore_Create, Binary_Semaphore_Delete,
        Binary_Semaphore_Obtain, Binary_Semaphore_Release,
        Binary_Semaphore_Flush, Interrupt_Connect,
        Interrupt_Number_To_Vector): Remove Import pragma.
        * libgnarl/s-taprop__rtems.adb: New file.

2021-10-11  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_fixd.adb (Get_Size_For_Value): New function returning a size
        suitable for a non-negative integer value.
        (Get_Type_For_Size): New function returning a standard type suitable
        for a size.
        (Build_Divide): Call both functions to compute the result type, but
        make sure to pass a non-negative value to the first.
        (Build_Multiply): Likewise.
        (Do_Multiply_Fixed_Universal): Minor consistency tweak.
        (Integer_Literal): Call both functions to compute the type.

2021-10-11  Etienne Servais  <servais@adacore.com>

        * sem_ch4.adb (Analyze_Membership_Op): Reorder subprogram spec
        and bodies in alphabetical order.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * exp_util.adb (Build_Class_Wide_Expression): Replace entities
        of both simple and extended names.

2021-10-11  Ghjuvan Lacambre  <lacambre@adacore.com>

        * libgnarl/s-intman__android.adb, libgnarl/s-intman__lynxos.adb,
        libgnarl/s-intman__posix.adb, libgnarl/s-intman__qnx.adb,
        libgnarl/s-intman__solaris.adb, libgnarl/s-intman__susv3.adb,
        libgnarl/s-taprob.adb, libgnarl/s-taprop__hpux-dce.adb,
        libgnarl/s-taprop__linux.adb, libgnarl/s-taprop__mingw.adb,
        libgnarl/s-taprop__posix.adb, libgnarl/s-taprop__qnx.adb,
        libgnarl/s-taprop__solaris.adb, libgnarl/s-taprop__vxworks.adb,
        libgnarl/s-taskin.adb, libgnarl/s-tasque.adb,
        libgnarl/s-tpoben.adb, libgnat/a-calend.adb,
        libgnat/a-excach.adb, libgnat/a-except.adb, libgnat/a-tags.adb,
        libgnat/a-textio.adb, libgnat/a-witeio.adb,
        libgnat/a-ztexio.adb, libgnat/g-binenv.adb,
        libgnat/s-parame.adb, libgnat/s-parame__vxworks.adb,
        libgnat/s-stratt.adb, libgnat/s-trasym__dwarf.adb: Mark imported
        binder globals as constant.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * exp_aggr.adb (Initialize_Record_Component): Add assertion
        about one of the parameters, so that illegal attempts to
        initialize record components with Empty node are detected early
        on.
        (Build_Record_Aggr_Code): Handle boxes in aggregate component
        associations just the components with no initialization in
        Build_Record_Init_Proc.
        * sem_aggr.adb (Resolve_Record_Aggregate): For components that
        require simple initialization carry boxes from resolution to
        expansion.
        * sem_util.adb (Needs_Simple_Initialization): Remove redundant
        paren.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Build_Init_Statements): Simplify detection of
        concurrent record types.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * exp_aggr.adb (Is_Delayed_Aggregate): Simplify.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * exp_aggr.adb (Has_Default_Init_Comps): Simplify.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * exp_aggr.adb (Component_OK_For_Backend): Remove redundant
        guard.

2021-10-11  Patrick Bernardi  <bernardi@adacore.com>

        * Makefile.rtl (RTEMS): Add s-stchop.o to
        EXTRA_GNATRTL_NONTASKING_OBJS, remove s-stchop__rtems.adb.
        * libgnat/s-stchop__rtems.adb: Removed.

2021-10-11  Marc Poulhiès  <poulhies@adacore.com>

        * expander.adb (Expand): Skip clearing of Analyzed flag if
        already set for N_Real_Literal.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Compile_Time_Constraint_Error): Simplify getting
        the type of the first formal parameter.

2021-10-11  Piotr Trojanek  <trojanek@adacore.com>

        * exp_util.adb (Inside_Init_Proc): Simplify.
        * sem_aggr.adb (Resolve_Record_Aggregate): Fix style.
        * sem_util.adb (Compile_Time_Constraint_Error): Guard against
        calling Corresponding_Concurrent_Type with an array type entity.

2021-10-11  Doug Rupp  <rupp@adacore.com>

        * libgnat/s-parame__ae653.ads (time_t_bits): Change to
        Long_Long_Integer'Size.  Add some comments to explain.

2021-10-08  Martin Liska  <mliska@suse.cz>

        * gcc-interface/misc.c (gnat_post_options): Use new macro
        OPTION_SET_P.
        (gnat_init_gcc_eh): Likewise.
        (gnat_init_gcc_fp): Likewise.

2021-10-05  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (gnat_to_gnu): Do not wrap boolean values
        referenced in pragmas.

2021-10-05  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (Subprogram_Body_to_gnu): Do not set the
        DECL_DISREGARD_INLINE_LIMITS flag if -gnatd.8 is specified.

2021-10-05  Bob Duff  <duff@adacore.com>

        * gcc-interface/trans.c (set_end_locus_from_node): Check that
        Handled_Statement_Sequence is not Empty before calling
        End_Label, because the Empty node has no End_Label, and
        depending on the exact node layout chosen by gen_il, calling
        End_Label might crash, or might work OK by accident.

2021-10-05  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/cuintp.c: Adjust placement of include directive.
        * gcc-interface/targtyps.c: Likewise.

2021-10-05  Alexandre Oliva  <oliva@adacore.com>

        * doc/gnat_rm.rst: Add...
        * doc/gnat_rm/security_hardening_features.rst: New.
        * doc/gnat_rm/about_this_guide.rst: Link to new chapter.
        * gnat_rm.texi: Regenerate.
        * gcc-interface/utils.c (handle_strub_attribute): New.
        (gnat_internal_attribute_table): Add strub.
        * libgnat/a-except.adb: Make Rcheck_CE_* strub-callable.
        * libgnat/a-except.ads (Raise_Exception): Likewise.
        (Raise_Exception_Always): Likewise.
        * libgnat/s-arit128.ads (Multiply_With_Ovflo_Check128):
        Likewise.
        * libgnat/s-arit64.ads (Multiply_With_Ovflo_Check64):
        Likewise.
        * libgnat/s-secsta.ads (SS_Allocate, SS_Mark, SS_Release):
        Likewise.

2021-10-05  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_ch9.adb (Install_Private_Data_Declarations): Copy the Sloc of
        components for the local renamings as well as the Comes_From_Source
        flag, and also set Warnings_Off on them.  Use Nam local variable.

2021-10-05  Arnaud Charlet  <charlet@adacore.com>

        * libgnarl/a-tasini.ads (Set_Initialization_Handler): Update
        comments.

2021-10-05  Corentin Gay  <gay@adacore.com>

        * init.c (QNX): Add #include errno.h.

2021-10-05  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_attr.adb (Expand_Fpt_Attribute): Likewise.
        * snames.ads-tmpl (Name_Unaligned_Valid): Delete.

2021-10-05  Etienne Servais  <servais@adacore.com>

        * sem_prag.adb (Analyze_Pragma): Forbid use of
        Compile_Time_(Error|Warning) as configuration pragma.
        * doc/gnat_ugn/the_gnat_compilation_model.rst:
        Compile_Time_(Error|Warning) and Compiler_Unit(_Warning) are not
        configuration pragmas and shall not be listed as such.  The
        following pragmas are either obsolete or undocumented:
        No_Run_Time, Propagate_Exceptions, Rational, Ravenscar,
        Restricted_Run_Time, Short_Descriptors, Universal_Data.  Fix
        some typos (notably on Restriction_Warnings).
        * doc/gnat_rm/implementation_defined_pragmas.rst: Move
        Rename_Pragma documentation to alphabetical order.
        * gnat_rm.texi, gnat_ugn.texi: Regenerate.

2021-10-05  Corentin Gay  <gay@adacore.com>

        * adaint.c (QNX): Add #include for sys/time.h.

2021-10-05  Pascal Obry  <obry@adacore.com>

        * libgnat/g-forstr.adb (Next_Format): When there is no more
        format specifier found issue a proper error message instead of
        raising a contraint error.

2021-10-05  Pascal Obry  <obry@adacore.com>

        * libgnat/g-forstr.adb (Get_Formatted): Fix computation of the
        number of zero to use in the formatted string. This was a wrong
        copy/paste.

2021-10-05  Pascal Obry  <obry@adacore.com>

        * libgnat/g-forstr.adb (Get_Formatted): Minor code clean-up.

2021-10-05  Etienne Servais  <servais@adacore.com>

        * libgnat/a-zchhan.ads, libgnat/a-zchhan.adb
        (Character_Set_Version, Is_Basic, To_Basic): New.
        * libgnat/a-zchuni.ads, libgnat/a-zchuni.adb (Is_Basic,
        To_Basic): New.

2021-10-05  Yannick Moy  <moy@adacore.com>

        * sem_aggr.adb (Resolve_Array_Aggregate): Improve error message.

2021-10-05  Gary Dismukes  <dismukes@adacore.com>

        * aspects.ads (type Aspect_Id): Add
        Aspect_Designated_Storage_Model and Aspect_Storage_Model_Type.
        (Aspect_Argument): Add associations for the above new aspects.
        (Is_Representation_Aspect): Likewise.
        (Aspect_Names, Aspect_Delay): Likewise.
        * exp_ch4.adb (Expand_N_Allocator): Call Find_Storage_Op rather
        than Find_Prim_Op.
        * exp_intr.adb (Expand_Unc_Deallocation): Likewise.
        * exp_util.ads (Find_Storage_Op): New function that locates
        either a primitive operation of a storage pool or an operation
        of a storage-model type specified in its Storage_Model_Type
        aspect.
        * exp_util.adb (Find_Storage_Op): New function that calls either
        Find_Prim_Op or Get_Storage_Model_Type_Entity to locate a
        storage-related operation that is associated with a type.
        * sem_ch13.adb (Analyze_Aspects_At_Freeze_Point): Analyzes,
        resolves, and validates the arguments of aspect
        Designated_Storage_Model_Type.
        (Analyze_Aspect_Specifications): Sets delay-related flags on
        storage-model aspects when Delay_Required. Checks that aspect
        Designated_Storage_Model is only specified for an access type
        and that aspect Storage_Model_Type is only specified on an
        immutably limited type. Also records such aspects for their
        associated types.
        (Check_Aspect_At_Freeze_Point): Resolve each of the argument
        associations given for a Storage_Model_Type aspect.
        (Resolve_Storage_Model_Type_Argument): New procedure that
        resolves an argument given in the association for a given entity
        name associated with a type with aspect Storage_Model_Type,
        ensuring that it has the proper kind or profile.
        (Validate_Storage_Model_Type_Aspect): New procedure that checks
        the legality and completeness of the entity associations given
        in a Storage_Model_Type aspect.
        * sem_util.ads (package Storage_Model_Support): New nested
        package that encapsulates a set of convenient utility functions
        for retrieving entities, etc. associated with
        storage-model-related types and objects.
        (Get_Storage_Model_Type_Entity): New function to return a
        specified entity associated with a type that has aspect
        Storage_Model_Type.
        (Has_Designated_Storage_Model_Aspect): New function that returns
        whether a type has aspect Designated_Storage_Model.
        (Has_Storage_Model_Type_Aspect): New function that returns
        whether a type has aspect Storage_Model_Type.
        (Storage_Model_Object): New function that returns the object
        Entity_Id associated with a type's Designated_Storage_Model
        aspect.
        (Storage_Model_Type): New function that returns the type
        associated with a storage-model object (when the object's type
        specifies Storage_Model_Type).
        (Storage_Model_Address_Type): New function that returns the
        Address_Type associated with a type that has aspect
        Storage_Model_Type.
        (Storage_Model_Null_Address): New function that returns the
        Null_Address constant associated with a type that has aspect
        Storage_Model_Type.
        (Storage_Model_Allocate): New function that returns the Allocate
        procedure associated with a type that has aspect
        Storage_Model_Type.
        (Storage_Model_Deallocate): New function that returns the
        Deallocate procedure associated with a type that has aspect
        Storage_Model_Type.
        (Storage_Model_Copy_From): New function that returns the
        Copy_From procedure associated with a type that has aspect
        Storage_Model_Type.
        (Storage_Model_Copy_To): New function that returns the Copy_To
        procedure associated with a type that has aspect
        Storage_Model_Type.
        (Storage_Model_Storage_Size): New function that returns the
        Storage_Size function associated with a type that has aspect
        Storage_Model_Type.
        * sem_util.adb (package Storage_Model_Support): Body of new
        nested package that contains the implementations the utility
        functions declared in the spec of this package.
        * snames.ads-tmpl: Add new names Name_Designated_Storage_Pool,
        Name_Storage_Model, Name_Storage_Model_Type, Name_Address_Type,
        Name_Copy_From, Name_Copy_To, and Name_Null_Address for the new
        aspects and associated aspect arguments.

2021-10-05  Richard Kenner  <kenner@adacore.com>

        * debug.adb: Add documentation for -gnatd_t.

2021-10-05  Corentin Gay  <gay@adacore.com>

        * sysdep.c (__gnat_is_file_not_found_error): Add else if case.

2021-10-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_util.adb (Build_Class_Wide_Expression): Replace entities
        of both identifiers and operator symbols.

2021-10-05  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch3.adb (Derive_Subprogram): Copy ghost status from parent
        to derived subprogram.

2021-10-05  Joffrey Huguet  <huguet@adacore.com>

        * libgnat/a-strunb.ads, libgnat/a-strunb__shared.ads: Add
        Default_Initial_Condition to Unbounded_String.

2021-10-05  Claire Dross  <dross@adacore.com>

        * libgnat/a-cfdlli.ads: Use pragma Assertion_Policy to disable
        contract cases at execution.
        * libgnat/a-cfinve.ads: Idem.
        * libgnat/a-cofove.ads: Idem.
        * libgnat/a-cfhase.ads: Idem.
        * libgnat/a-cfhama.ads: Idem.
        * libgnat/a-cforse.ads: Idem.
        * libgnat/a-cforma.ads: Idem.

2021-10-05  Bob Duff  <duff@adacore.com>

        * par-ch4.adb (P_Iterated_Component_Association): Parse these
        features the same way in all language versions.  Move the call
        to Error_Msg_Ada_2022_Feature into semantic analysis.
        * sem_aggr.adb (Resolve_Iterated_Component_Association,
        Resolve_Iterated_Association): Move the call to
        Error_Msg_Ada_2022_Feature here from par-ch4.adb.

2021-10-05  Yannick Moy  <moy@adacore.com>

        * sem_res.adb (Resolve): Recognize specially that case.

2021-10-05  Yannick Moy  <moy@adacore.com>

        * libgnat/a-strmap.adb: Add ghost code for proof.
        (To_Range): This is the most involved proof, as it requires
        creating the result of the call to To_Domain as a ghost
        variable, and show the unicity of this result in order to prove
        the postcondition.
        * libgnat/a-strmap.ads: (SPARK_Proof_Sorted_Character_Sequence):
        New ghost function.
        (To_Domain): Add postcondition regarding sorting of result.
        (To_Range): Fix postcondition that should compare Length instead
        of Last for the results of To_Domain and To_Range, as the value
        of Last for an empty result is not specified in the Ada RM.

2021-10-05  Yannick Moy  <moy@adacore.com>

        * libgnat/a-chahan.adb: Add loop invariants as needed to prove
        subprograms.  Also use extended return statements where
        appropriate and not done already.  Mark data with
        Relaxed_Initialization where needed for initialization by parts.
        Convert regular functions to expression functions where needed
        for proof.
        * libgnat/a-chahan.ads: Add postconditions.
        * libgnat/a-strmap.ads (Model): New ghost function to create a
        publicly visible model of the private data Character_Mapping,
        needed in order to prove subprograms in Ada.Characters.Handling.

2021-10-04  Justin Squirek  <squirek@adacore.com>

        * doc/gnat_rm/standard_and_implementation_defined_restrictions.rst:
        Add new entry for No_Dynamic_Accessibility_Checks documenting
        behavior.
        * gnat_rm.texi: Regenerate.
        * exp_ch4.adb (Expand_N_In): Perform special expansion for
        membership tests when No_Dynamic_Accessibility_Checks is active.
        * sem_attr.adb (Resolve_Attribute): Skip static accessibility
        check on actuals for anonymous access type formal parameters,
        and add constants for readability.
        * sem_util.adb (Function_Call_Or_Allocator_Level): Use the
        innermost master for determining the level for function calls
        within the alternative accessibility model.
        (Type_Access_Level): Properly get the level for anonymous access
        function result types.

2021-10-04  Piotr Trojanek  <trojanek@adacore.com>

        * doc/gnat_ugn/building_executable_programs_with_gnat.rst
        (gnateA): This switch no longer looks at the formal parameter
        type being composite (as originally mandated by SPARK), but in
        the parameter passing mechanism being not specified (as
        currently mandated by Ada).
        * gnat_ugn.texi: Regenerate.

2021-10-04  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch6.adb (Analyze_Operator_Symbol): Recognize strings as
        operator names when they are the value of one of the Ada2022
        aspects for User_Defined_Literals.
        * sem_ch13.adb (Analyze_One_Aspect): Handle an aspect value
        given by an Operator_Name.
        (Validate_Literal_Aspect): Call Analyze_Operator_Symbol when
        needed.

2021-10-04  Piotr Trojanek  <trojanek@adacore.com>

        * gen_il-gen.adb (Put_Make_Spec): Don't emit the LF character in
        the middle of a string, because the Put routine won't indent it
        properly.

2021-10-04  Ghjuvan Lacambre  <lacambre@adacore.com>

        * gnat_cuda.adb (Remove_CUDA_Device_Entities): New function.
        (Expand_CUDA_Package): Call Remove_CUDA_Device_Entities.
        * gnat_cuda.ads (Expand_CUDA_Package): Expand documentation.
        * sem_prag.adb (Analyze_Pragma): Remove warning about
        CUDA_Device not being implemented.

2021-10-04  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch7.adb (Analyze_Package_Specification): For types marked
        as Must_Have_Preelab_Init, we now check for the presence of a
        Preelaborable_Initialization aspect on the type, and pass the
        aspect's expression (if any) on the call to
        Has_Preelaborable_Initialization (or pass Empty if the type has
        no such aspect or the aspect has no associated expression).
        * sem_util.ads (Has_Preelaborable_Initialization): Change
        Boolean formal parameter Formal_Types_Have_Preelab_Init to
        instead be a formal of type Node_Id (named Preelab_Init_Expr),
        to allow passing an expression that may be a conjunction of
        Preelaborable_Initialization aspects. Revise spec comment
        accordingly (and remove ??? comment).
        * sem_util.adb (Type_Named_In_Preelab_Init_Expression): New
        nested function with a result indicating whether a given type is
        named as the prefix of a Preelaborable_Initialization attribute
        in the expression of a corresponding P_I aspect.
        (Has_Preelaborable_Initialization): For generic formal derived
        and private types, test whether the type is named in the
        expression Preelab_Init_Expr (by calling
        Type_Named_In_Preelab_Init_Expression), and if so, treat the
        formal type as having preelaborable initialization (returning
        True).
        * libgnat/a-cobove.ads (Vector): Replace pragma
        Preelaborable_Initialization with the aspect, specifying its
        value as Element_Type'Preelaborable_Initialization.
        (Cursor): Replace pragma P_I with the aspect (defaulting to
        True).
        * libgnat/a-cbdlli.ads (List): Replace pragma
        Preelaborable_Initialization with the aspect, specifying its
        value as Element_Type'Preelaborable_Initialization.
        (Cursor): Replace pragma P_I with the aspect (defaulting to
        True).
        * libgnat/a-cbhama.ads (Map): Replace pragma
        Preelaborable_Initialization with the aspect, specifying its
        value as (Element_Type'Preelaborable_Initialization and
        Key_Type'Preelaborable_Initialization).
        (Cursor): Replace pragma P_I with the aspect (defaulting to
        True).
        * libgnat/a-cborma.ads (Map): Replace pragma
        Preelaborable_Initialization with the aspect, specifying its
        value as (Element_Type'Preelaborable_Initialization and
        Key_Type'Preelaborable_Initialization).
        (Cursor): Replace pragma P_I with the aspect (defaulting to
        True).
        * libgnat/a-cbhase.ads (Set): Replace pragma
        Preelaborable_Initialization with the aspect, specifying its
        value as Element_Type'Preelaborable_Initialization.
        (Cursor): Replace pragma P_I with the aspect (defaulting to
        True).
        * libgnat/a-cborse.ads (Set): Replace pragma
        Preelaborable_Initialization with the aspect, specifying its
        value as Element_Type'Preelaborable_Initialization.
        (Cursor): Replace pragma P_I with the aspect (defaulting to
        True).
        * libgnat/a-cbmutr.ads (Tree): Replace pragma
        Preelaborable_Initialization with the aspect, specifying its
        value as Element_Type'Preelaborable_Initialization.
        (Cursor): Replace pragma P_I with the aspect (defaulting to
        True).
        * libgnat/a-coboho.ads (Holder): Replace pragma
        Preelaborable_Initialization with the aspect, specifying its
        value as Element_Type'Preelaborable_Initialization.
        (Cursor): Replace pragma P_I with the aspect (defaulting to
        True).

2021-10-04  Yannick Moy  <moy@adacore.com>

        * libgnat/a-textio.adb: Mark body out of SPARK.
        * libgnat/a-textio.ads: Mark spec in SPARK and private part out
        of SPARK.
        * sem.adb (Semantics.Do_Analyze): Similar to ghost code
        attributes, save and restore value of
        Ignore_SPARK_Mode_Pragmas_In_Instance.

2021-10-04  Bob Duff  <duff@adacore.com>

        * libgnat/s-regpat.ads: Change Data_First to Data'First. Change
        "still" to "always".  Similar changes for Data_Last.

2021-10-04  Piotr Trojanek  <trojanek@adacore.com>

        * sprint.adb (Sprint_Node_Actual): Refactor code for generic
        package and subprogram declarations.

2021-10-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Resolve_Indexed_Component, Resolve_Slice): Rename
        the local constant Name to Pref; remove repeated calls to
        Prefix.

2021-10-04  Matthieu Eyraud  <eyraud@adacore.com>

        * scos.ads: Extend the documentation.
        * par_sco.adb (Process_Decisions): Emit specific SCOs for
        quantified expressions.

2021-10-04  Piotr Trojanek  <trojanek@adacore.com>

        * checks.adb (Selected_Range_Checks): Fix style.
        * exp_ch4.adb (Expand_N_Slice): Fix style and comment.
        * sem_res.adb (Resolve_Indexed_Component): Fix style.

2021-10-04  Yannick Moy  <moy@adacore.com>

        * libgnat/a-strbou.ads: Add comments.

2021-10-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_attr.adb (Eval_Attribute): Evaluation of attribute
        Leading_Part with illegal second parameter is now similar to
        evaluation of Remainder with its second parameter being zero.

2021-10-04  Ed Schonberg  <schonberg@adacore.com>

        * sem_res.adb (Resolve_Declare_Expression): Use tree traversals
        to perform name capture of local entities in the expression of
        the construct.
        * exp_util.adb (Possible_Side_Effects_In_SPARK): Do not apply to
        the prefix of an attribute reference Reduce when that prefix is
        an aggregate, because it will be expanded into a loop, and has
        no identifiable type.

2021-10-04  Javier Miranda  <miranda@adacore.com>

        * sem_ch8.adb (Build_Class_Wide_Wrapper): Fix handling of
        class-wide subtypes; required to handle chains of
        instantiations. Adding also code to identify these wrappers and
        properly resolve instantiations where the wrapper and a tagged
        type primitive are visible.
        * einfo.ads (Is_Class_Wide_Wrapper): Adding documentation.
        * gen_il-fields.ads (Opt_Field_Enum): Adding
        Is_Class_Wide_Wrapper.
        * gen_il-gen-gen_entities.adb (Root_Entity_Type): Adding
        semantic flag Is_Class_Wide_Wrapper.

2021-10-04  Bob Duff  <duff@adacore.com>

        * einfo.ads (Declaration_Node): Document that Declaration_Node
        for Itypes.
        * einfo-utils.adb (Declaration_Node): Make it return Empty for
        Itypes, or a proper type or subtype declaration.
        * gen_il-gen.adb: Minor comment improvement.

2021-10-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Resolve_Slice): Fix application of range checks
        to slice range given as a subtype name.

2021-10-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Resolve_Slice): Handle range given as a subtype
        indication.

2021-10-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Resolve_Slice): Add custom handling of attribute
        Image and similar in CodePeer mode. This complements the
        existing custom handling of these attributes in
        Expand_N_Attribute_Reference.

2021-10-04  Justin Squirek  <squirek@adacore.com>

        * sem_util.adb (Is_Variable): Add check for implicitly
        dereferenced access types
        (Is_Dependent_Component_Of_Mutable_Object): Set Prefix_Type when
        not specified.

2021-10-04  Eric Botcazou  <ebotcazou@adacore.com>

        * doc/gnat_ugn/the_gnat_compilation_model.rst (Binding generation):
        Document specific behavior for /include/-ending paths and update.
        * gnat_ugn.texi: Regenerate.

2021-10-04  Arnaud Charlet  <charlet@adacore.com>

        PR ada/102073
        * socket.c (__gnat_gethostbyaddr, __gnat_inet_pton): Add missing
        return statements.

2021-10-04  Justin Squirek  <squirek@adacore.com>

        * sem_util.adb (Function_Or_Allocator_Level): Properly handle
        direct function calls in the default alternative accessibility
        checking mode.

2021-10-04  Javier Miranda  <miranda@adacore.com>

        * sem_util.adb (Is_Library_Level_Entity): Return False for
        entities defined in E_Loop scopes. This change is not required
        by the frontend; it is required by tools that depend on the
        frontend sources.
        * einfo-utils.adb (Is_Dynamic_Scope): Code cleanup.

2021-10-04  Justin Squirek  <squirek@adacore.com>

        * sem_util.adb (Accessibility_Level): Add a case to handle
        renamed subprograms in addition to renamed objects.

2021-10-04  Doug Rupp  <rupp@adacore.com>

        * libgnarl/s-osinte__vxworks.ads (tlsKeyCreate): Return int.
        * libgnarl/s-tpopsp__vxworks-rtp.adb (ERROR): Declare from
        System.VxWorks.Ext.ERROR.
        (Initialize): Declare IERR. Assert it.
        * libgnarl/s-tpopsp__vxworks.adb (ERROR): Declare from
        System.VxWorks.Ext.ERROR.
        (Is_Valid_Task): Declare IERR. Test return.
        * libgnarl/s-vxwext__kernel.adb (semDelete): Return STATUS.

2021-10-04  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_disp.adb (Make_DT): Copy the Needs_Debug_Info flag from the
        type onto the TSD object.

2021-10-04  Steve Baird  <baird@adacore.com>

        * sem_util.adb (Is_Repeatedly_Evaluated): Handle the case of an
        Old attribute reference that occurs within what was originally a
        quantified expression but which expansion has transformed into
        an Expression_With_Actions.

2021-10-04  Steve Baird  <baird@adacore.com>

        * exp_ch4.adb (Expand_N_Indexed_Component): The two improvements
        described above.

2021-10-01  Bob Duff  <duff@adacore.com>

        * exp_ch6.adb (Expand_Call_Helper): Do not call
        Check_Subprogram_Variant if the subprogram is an ignored ghost
        entity. Otherwise the compiler crashes (in debug builds) or
        gives strange error messages (in production builds).

2021-10-01  Ghjuvan Lacambre  <lacambre@adacore.com>

        * gnat_cuda.adb (Empty_CUDA_Global_Subprograms): New procedure.
        (Expand_CUDA_Package): Call Empty_CUDA_Global_Subprograms.

2021-10-01  Steve Baird  <baird@adacore.com>

        * checks.ads: Define a type Dimension_Set. Add an out-mode
        parameter of this new type to Generate_Index_Checks so that
        callers can know for which dimensions a check was generated. Add
        an in-mode parameter of this new type to
        Apply_Subscript_Validity_Checks so that callers can indicate
        that no check is needed for certain dimensions.
        * checks.adb (Generate_Index_Checks): Implement new
        Checks_Generated parameter.
        (Apply_Subscript_Validity_Checks): Implement new No_Check_Needed
        parameter.
        * exp_ch4.adb (Expand_N_Indexed_Component): Call
        Apply_Subscript_Validity_Checks in more cases than before. This
        includes declaring two new local functions,
        (Is_Renamed_Variable_Name,
        Type_Requires_Subscript_Validity_Checks_For_Reads): To help in
        deciding whether to call Apply_Subscript_Validity_Checks.
        Adjust to parameter profile changes in Generate_Index_Checks and
        Apply_Subscript_Validity_Checks.

2021-10-01  Eric Botcazou  <ebotcazou@adacore.com>

        * doc/gnat_rm/implementation_defined_characteristics.rst: Document
        the rounding mode assumed for dynamic computations as per 3.5.7(16).
        * gnat_rm.texi: Regenerate.

2021-10-01  Bob Duff  <duff@adacore.com>

        * table.ads (Table_Type): Remove "aliased"; no longer needed by
        Atree.  Besides it contradicted the comment a few lines above,
        "--  Note: We do not make the table components aliased...".
        * types.ads: Move type Slot to Atree.
        * atree.ads: Move type Slot fromt Types to here.  Move type
        Node_Header from Seinfo to here.
        * atree.adb: Avoid the need for aliased components of the Slots
        table.  Instead of 'Access, use a getter and setter.  Misc
        cleanups.
        (Print_Statistics): Print statistics about node and entity kind
        frequencies. Give 3 digit fractions instead of percentages.
        * (Get_Original_Node_Count, Set_Original_Node_Count): Statistics
        for calls to Original_Node and Set_Original_Node.
        (Original_Node, Set_Original_Node): Gather statistics by calling
        the above.
        (Print_Field_Statistics): Print Original_Node statistics.
        (Update_Kind_Statistics): Remove, and put all statistics
        gathering under "if Atree_Statistics_Enabled", which is a flag
        generated in Seinfo by Gen_IL.
        * gen_il-gen.adb (Compute_Field_Offsets): Choose offsets of
        Nkind, Ekind, and Homonym first. This causes a slight efficiency
        improvement.  Misc cleanups.  Do not generate Node_Header; it is
        now hand-written in Atree.  When choosing the order in which to
        assign offsets, weight by the frequency of the node type, so the
        more common nodes get their field offsets assigned earlier.  Add
        more special cases.
        (Compute_Type_Sizes): Remove this and related things.
        There was a comment: "At some point we can instrument Atree to
        print out accurate size statistics, and remove this code." We
        have Atree statistics, so we now remove this code.
        (Put_Seinfo): Generate Atree_Statistics_Enabled, which is equal
        to Statistics_Enabled. This allows Atree to say "if
        Atree_Statistics_Enabled then <gather statistics>" for
        efficiency. When Atree_Statistics_Enabled is False, the "if ..."
        will be optimized away.
        * gen_il-internals.ads (Type_Frequency): New table of kind
        frequencies.
        * gen_il-internals.adb: Minor comment improvement.
        * gen_il-fields.ads: Remove unused subtypes.  Suppress style
        checks in the Type_Frequency table.  If we regenerate this
        table (see -gnatd.A) we don't want to have to fiddle with
        casing.
        * impunit.adb: Minor.
        * sinfo-utils.adb: Minor.
        * debug.adb: Minor comment improvement.

2021-10-01  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_type.adb (Specific_Type): Check that the type is tagged
        before calling Interface_Present_In_Ancestor on it.

2021-10-01  Eric Botcazou  <ebotcazou@adacore.com>

        * debug.adb (d.8): Document usage.
        * fe.h (Debug_Flag_Dot_8): Declare.

2021-10-01  Gary Dismukes  <dismukes@adacore.com>

        * sem_util.adb (Enter_Name): Suppress hiding warning when in an
        instance.

2021-10-01  Ed Schonberg  <schonberg@adacore.com>

        * sem_attr.adb (Analyze_Attribute, case Type_Key): Attribute can
        be applied to a formal type.
        * sem_ch5.adb (Analyze_Case_Statement): If Extensions_Allowed is
        not enabled, verify that the type of the expression is discrete.

2021-10-01  Justin Squirek  <squirek@adacore.com>

        * exp_dbug.adb (Debug_Renaming_Declaration): Add check for
        Entity present for Ren to prevent looking at unanalyzed nodes

2021-10-01  Ghjuvan Lacambre  <lacambre@adacore.com>

        * atree.adb (Print_Statistics): Help CodePeer see Total as
        greater than zero.
        * gen_il-gen.adb (One_Comp): Annotate Field_Table as Modified.

2021-10-01  Richard Kenner  <kenner@adacore.com>

        * gen_il-gen-gen_entities.adb (Evaluable_Kind,
        Global_Name_Kind): Add.
        * gen_il-types.ads (Evaluable_Kind, Global_Name_Kind): Likewise.

2021-10-01  Ghjuvan Lacambre  <lacambre@adacore.com>

        * aspects.ads: Add CUDA_Device aspect.
        * gnat_cuda.ads (Add_CUDA_Device_Entity): New subprogram.
        * gnat_cuda.adb:
        (Add_CUDA_Device_Entity): New subprogram.
        (CUDA_Device_Entities_Table): New hashmap for CUDA_Device
        entities.
        (Get_CUDA_Device_Entities): New internal subprogram.
        (Set_CUDA_Device_Entities): New internal subprogram.
        * par-prag.adb (Prag): Handle pragma id Pragma_CUDA_Device.
        * sem_prag.ads (Aspect_Specifying_Pragma): Mark CUDA_Device as
        being both aspect and pragma.
        * sem_prag.adb (Analyze_Pragma): Add CUDA_Device entities to
        list of CUDA_Entities belonging to package N.
        (Sig_Flags): Signal CUDA_Device entities as referenced.
        * snames.ads-tmpl: Create CUDA_Device names and pragmas.

2021-10-01  Gary Dismukes  <dismukes@adacore.com>

        * exp_util.adb (Build_DIC_Procedure_Body): Remove inappropriate
        Assert pragma.  Remove unneeded and dead code related to derived
        private types.

2021-10-01  Richard Kenner  <kenner@adacore.com>

        * gen_il-gen-gen_nodes.adb (N_Alternative, N_Is_Case_Choice):
        Add.
        (N_Is_Exception_Choice, N_Is_Range): Likewise.
        * gen_il-types.ads: Add above names.
        * gen_il-gen.adb (Put_Union_Membership): Write both declarations
        and definitions of union functions.

2021-10-01  Ed Schonberg  <schonberg@adacore.com>

        * exp_aggr.adb (Expand_Array_Aggregate,
        Two_Pass_Aggregate_Expansion): Increment index for element
        insertion within the loop, only if upper bound has not been
        reached.

2021-10-01  Javier Miranda  <miranda@adacore.com>

        * contracts.ads (Make_Class_Precondition_Subps): New subprogram.
        (Merge_Class_Conditions): New subprogram.
        (Process_Class_Conditions_At_Freeze_Point): New subprogram.
        * contracts.adb (Check_Class_Condition): New subprogram.
        (Set_Class_Condition): New subprogram.
        (Analyze_Contracts): Remove code analyzing class-wide-clone
        subprogram since it is no longer built.
        (Process_Spec_Postconditions): Avoid processing twice seen
        subprograms.
        (Process_Preconditions): Simplify its functionality to
        non-class-wide preconditions.
        (Process_Preconditions_For): No action needed for wrappers and
        helpers.
        (Make_Class_Precondition_Subps): New subprogram.
        (Process_Class_Conditions_At_Freeze_Point): New subprogram.
        (Merge_Class_Conditions): New subprogram.
        * exp_ch6.ads (Install_Class_Preconditions_Check): New
        subprogram.
        * exp_ch6.adb (Expand_Call_Helper): Install class-wide
        preconditions check on dispatching primitives that have or
        inherit class-wide preconditions.
        (Freeze_Subprogram): Remove code for null procedures with
        preconditions.
        (Install_Class_Preconditions_Check): New subprogram.
        * exp_util.ads (Build_Class_Wide_Expression): Lower the
        complexity of this subprogram; out-mode formal Needs_Wrapper
        since this functionality is now provided by a new subprogram.
        (Get_Mapped_Entity): New subprogram.
        (Map_Formals): New subprogram.
        * exp_util.adb (Build_Class_Wide_Expression): Lower the
        complexity of this subprogram. Its previous functionality is now
        provided by subprograms Needs_Wrapper and Check_Class_Condition.
        (Add_Parent_DICs): Map the overridden primitive to the
        overriding one.
        (Get_Mapped_Entity): New subprogram.
        (Map_Formals): New subprogram.
        (Update_Primitives_Mapping): Adding assertion.
        * freeze.ads (Check_Inherited_Conditions): Subprogram made
        public with added formal to support late overriding.
        * freeze.adb (Check_Inherited_Conditions): New implementation;
        builds the dispatch table wrapper required for class-wide
        pre/postconditions; added support for late overriding.
        (Needs_Wrapper): New subprogram.
        * sem.ads (Inside_Class_Condition_Preanalysis): New global
        variable.
        * sem_disp.ads (Covered_Interface_Primitives): New subprogram.
        * sem_disp.adb (Covered_Interface_Primitives): New subprogram.
        (Check_Dispatching_Context): Skip checking context of
        dispatching calls during preanalysis of class-wide conditions
        since at that stage the expression is not installed yet on its
        definite context.
        (Check_Dispatching_Call): Skip checking 6.1.1(18.2/5) by
        AI12-0412 on helpers and wrappers internally built for
        supporting class-wide conditions; for late-overriding
        subprograms call Check_Inherited_Conditions to build the
        dispatch-table wrapper (if required).
        (Propagate_Tag): Adding call to
        Install_Class_Preconditions_Check.
        * sem_util.ads (Build_Class_Wide_Clone_Body): Removed.
        (Build_Class_Wide_Clone_Call): Removed.
        (Build_Class_Wide_Clone_Decl): Removed.
        (Class_Condition): New subprogram.
        (Nearest_Class_Condition_Subprogram): New subprogram.
        * sem_util.adb (Build_Class_Wide_Clone_Body): Removed.
        (Build_Class_Wide_Clone_Call): Removed.
        (Build_Class_Wide_Clone_Decl): Removed.
        (Class_Condition): New subprogram.
        (Nearest_Class_Condition_Subprogram): New subprogram.
        (Eligible_For_Conditional_Evaluation): No need to evaluate
        class-wide conditions during preanalysis since the expression is
        not installed on its definite context.
        * einfo.ads (Class_Wide_Clone): Removed.
        (Class_Postconditions): New attribute.
        (Class_Preconditions): New attribute.
        (Class_Preconditions_Subprogram): New attribute.
        (Dynamic_Call_Helper): New attribute.
        (Ignored_Class_Postconditions): New attribute.
        (Ignored_Class_Preconditions): New attribute.
        (Indirect_Call_Wrapper): New attribute.
        (Is_Dispatch_Table_Wrapper): New attribute.
        (Static_Call_Helper): New attribute.
        * exp_attr.adb (Expand_N_Attribute_Reference): When the prefix
        is of an access-to-subprogram type that has class-wide
        preconditions and an indirect-call wrapper of such subprogram is
        available, replace the prefix by the wrapper.
        * exp_ch3.adb (Build_Class_Condition_Subprograms): New
        subprogram.
        (Register_Dispatch_Table_Wrappers): New subprogram.
        * exp_disp.adb (Build_Class_Wide_Check): Removed; class-wide
        precondition checks now rely on internally built helpers.
        * sem_ch13.adb (Analyze_Aspect_Specifications): Set initial
        value of attributes Class_Preconditions, Class_Postconditions,
        Ignored_Class_Preconditions and Ignored_Class_Postconditions.
        These values are later updated with the full pre/postcondition
        by Merge_Class_Conditions.
        (Freeze_Entity_Checks): Call
        Process_Class_Conditions_At_Freeze_Point.
        * sem_ch6.adb (Analyze_Subprogram_Body_Helper): Remove code
        building the body of the class-wide clone subprogram since it is
        no longer required.
        (Install_Entity): Adding assertion.
        * sem_prag.adb (Analyze_Pre_Post_Condition_In_Decl_Part): Remove
        code building and analyzing the class-wide clone subprogram; no
        longer required.
        (Build_Pragma_Check_Equivalent): Adjust call to
        Build_Class_Wide_Expression since the formal named Needs_Wrapper
        has been removed.
        * sem_attr.adb (Analyze_Attribute_Old_Result): Skip processing
        these attributes during preanalysis of class-wide conditions
        since at that stage the expression is not installed yet on its
        definite context.
        * sem_res.adb (Resolve_Actuals): Skip applying RM 3.9.2(9/1) and
        SPARK RM 6.1.7(3) on actuals of internal helpers and wrappers
        built to support class-wide preconditions.
        * sem_ch5.adb (Process_Bounds): Do not generate a constant
        declaration for the bounds when we are preanalyzing a class-wide
        condition.
        (Analyze_Loop_Parameter_Specification): Handle preanalysis of
        quantified expression placed in the outermost expression of a
        class-wide condition.
        * ghost.adb (Check_Ghost_Context): No check required during
        preanalysis of class-wide conditions.
        * gen_il-fields.ads (Opt_Field_Enum): Adding
        Class_Postconditions, Class_Preconditions,
        Class_Preconditions_Subprogram, Dynamic_Call_Helper,
        Ignored_Class_Postconditions, Ignored_Class_Preconditions,
        Indirect_Call_Wrapper, Is_Dispatch_Table_Wrapper,
        Static_Call_Helper.
        * gen_il-gen-gen_entities.adb (Is_Dispatch_Table_Wrapper):
        Adding semantic flag Is_Dispatch_Table_Wrapper; removing
        semantic field Class_Wide_Clone; adding semantic fields for
        Class_Postconditions, Class_Preconditions,
        Class_Preconditions_Subprogram, Dynamic_Call_Helper,
        Ignored_Class_Postconditions, Indirect_Call_Wrapper,
        Ignored_Class_Preconditions, and Static_Call_Helper.

2021-10-01  Piotr Trojanek  <trojanek@adacore.com>

        * comperr.adb (Delete_SCIL_Files): Handle generic subprogram
        declarations and renaming just like generic package declarations
        and renamings, respectively; handle
        N_Subprogram_Renaming_Declaration.

2021-10-01  Steve Baird  <baird@adacore.com>

        * bcheck.adb (Check_Versions): Add support for the case where
        the .ali file contains both a primary and a secondary version
        number, as in "GNAT Lib v22.20210809".

2021-10-01  Steve Baird  <baird@adacore.com>

        * sem_res.adb (Resolve): Two separate fixes. In the case where
        Find_Aspect for a literal aspect returns the aspect for a
        different (ancestor) type, call Corresponding_Primitive_Op to
        get the right callee. In the case where a downward tagged type
        conversion appears to be needed, generate a null extension
        aggregate instead, as per Ada RM 3.4(27).
        * sem_util.ads, sem_util.adb: Add new Corresponding_Primitive_Op
        function. It maps a primitive op of a tagged type and a
        descendant type of that tagged type to the corresponding
        primitive op of the descendant type. The body of this function
        was written by Javier Miranda.

2021-10-01  Bob Duff  <duff@adacore.com>

        * atree.adb: Gather and print statistics about frequency of
        getter and setter calls.
        * atree.ads (Print_Statistics): New procedure for printing
        statistics.
        * debug.adb: Document -gnatd.A switch.
        * gen_il-gen.adb: Generate code for statistics gathering.
        Choose the offset of Homonym early.  Misc cleanup.  Put more
        comments in the generated code.
        * gen_il-internals.ads (Unknown_Offset): New value to indicate
        that the offset has not yet been chosen.
        * gnat1drv.adb: Call Print_Statistics.
        * libgnat/s-imglli.ads: Minor comment fix.
        * output.ads (Write_Int_64): New procedure to write a 64-bit
        value.  Needed for new statistics, and could come in handy
        elsewhere.
        * output.adb (Write_Int_64): Likewise.
        * sinfo.ads: Remove obsolete comment. The xtreeprs program no
        longer exists.
        * types.ads: New 64-bit types needed for new statistics.

2021-10-01  Dmitriy Anisimkov  <anisimko@adacore.com>

        * libgnat/memtrack.adb (Putc): New routine wrapped around fputc
        with error check.
        (Write): New routine wrapped around fwrite with error check.
        Remove bound functions fopen, fwrite, fputs, fclose, OS_Exit.
        Use the similar routines from System.CRTL and System.OS_Lib.

2021-10-01  Ed Schonberg  <schonberg@adacore.com>

        * exp_aggr.adb (Must_Slide): If the aggregate only contains an
        others_clause no sliding id involved. Otherwise sliding is
        required if any bound of the aggregate or the context subtype is
        non-static.

2021-10-01  Richard Kenner  <kenner@adacore.com>

        * gen_il-gen-gen_nodes.adb (N_Is_Decl): Add.
        * gen_il-types.ads (N_Is_Decl): Likewise.

2021-10-01  Richard Kenner  <kenner@adacore.com>

        * gen_il-gen-gen_nodes.adb (N_Entity_Name): Add.
        * gen_il-types.ads (N_Entity_Name): Likewise.

2021-10-01  Steve Baird  <baird@adacore.com>

        * bcheck.adb (Check_Versions): In the case of an ali file
        version mismatch, if distinct integer values can be extracted
        from the two version strings then include those values in the
        generated error message.

2021-10-01  Steve Baird  <baird@adacore.com>

        * sem_elab.adb (Is_Safe_Call): Return True in the case of a
        (possibly rewritten) call to an expression function.

2021-10-01  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_aggr.adb (Resolve_Iterated_Component_Association):
        Initialize Id_Typ to Any_Type by default.

2021-10-01  Eric Botcazou  <ebotcazou@adacore.com>

        * doc/gnat_ugn/gnat_and_program_execution.rst (gnatmem): Document
        that it works only with fixed-position executables.

2021-10-01  Doug Rupp  <rupp@adacore.com>

        * libgnat/s-parame__vxworks.ads (time_t_bits): Change to
        Long_Long_Integer'Size.

2021-09-23  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity): Fix comment.

2021-09-23  Richard Kenner  <kenner@adacore.com>

        * gen_il-gen-gen_entities.adb (Subprogram_Body_Or_Type): Add.
        * gen_il-types.ads (Subprogram_Body_Or_Type): Likewise.

2021-09-23  Richard Kenner  <kenner@adacore.com>

        * einfo-utils.adb (Next_Index): Verify input and output are
        N_Is_Index.
        * gen_il-gen-gen_nodes.adb (N_Has_Bounds, N_Is_Index): Add.
        * gen_il-types.ads (N_Has_Bounds, N_Is_Index): Likewise.
        * sem_ch3.adb (Array_Type_Declaration): Use Next, not
        Next_Index.
        * sem_ch12.adb (Formal_Dimensions): Likewise.
        * sem_util.adb (Is_Valid_Renaming): Likewise.

2021-09-23  Eric Botcazou  <ebotcazou@adacore.com>

        * doc/gnat_ugn/gnat_utility_programs.rst (gnatsymbolize):
        Document new --load option and -g1 as minimal compilation
        requirement.

2021-09-23  Piotr Trojanek  <trojanek@adacore.com>

        * sem_aggr.adb (Resolve_Array_Aggregate): Only keep the bounds
        for internally generated attributes; otherwise, compute them
                anew.

2021-09-23  Javier Miranda  <miranda@adacore.com>

        * sem_ch3.adb (Build_Access_Subprogram_Wrapper): Decorate the
        wrapper with attribute Is_Wrapper, and move its declaration to
        the freezing actions of its type declaration; done to facilitate
        identifying it at later stages to avoid handling it as a
        primitive operation of a tagged type; otherwise it may be
        handled as a dispatching operation and erroneously registered in
        a dispatch table.
        (Make_Index): Add missing decoration of field Parent.
        * sem_disp.adb (Check_Dispatching_Operation): Complete
        decoration of late-overriding dispatching primitives.
        (Is_Access_To_Subprogram_Wrapper): New subprogram.
        (Inherited_Subprograms): Prevent cascaded errors; adding missing
        support for private types.
        * sem_type.adb (Add_One_Interp): Add missing support for the
        first interpretation of a primitive of an inmediate ancestor
        interface.
        * sem_util.adb (Check_Result_And_Post_State_In_Pragma): Do not
        report missing reference in postcondition placed in internally
        built wrappers.
        * exp_disp.adb (Expand_Dispatching_Call): Adding assertion.

2021-09-23  Ed Schonberg  <schonberg@adacore.com>

        * sem_aggr.adb (Resolve_Array_Aggregate): Check the validity of
        an array aggregate all of whose components are iterated
        component associations.
        * exp_aggr.adb (Expand_Array_Aggregate,
        Two_Pass_Aggregate_Expansion): implement two-pass algorithm and
        replace original aggregate with resulting temporary, to ensure
        that a proper length check is performed if context is
        constrained. Use attributes Pos and Val to handle index types of
        any discrete type.

2021-09-23  Bob Duff  <duff@adacore.com>

        * gen_il-gen.adb: Set the number of concrete nodes that have the
        Homonym field to a higher number than any other field. This
        isn't true, but it forces Homonym's offset to be chosen first,
        so it will be at offset zero and hence slot zero.

2021-09-23  Richard Kenner  <kenner@adacore.com>

        * atree.adb (Relocate_Node): If relocating a subprgram call and
        we're doing unnesting, make a new Parameter_Associations, if
        any.

2021-09-23  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-strbou.ads (Generic_Bounded_Length): Remove explicit
        Initializes contract.

2021-09-23  Bob Duff  <duff@adacore.com>

        * gen_il-gen.adb: Generate getters and setters with much of the
        code inlined. Generate code for storing a few fields in the node
        header, to avoid the extra level of indirection for those
        fields. We generate the header type, so we don't have to
        duplicate hand-written Ada and C code to depend on the number of
        header fields.  Declare constants for slot size. Use short names
        because these are used all over.  Remove
        Put_Low_Level_Accessor_Instantiations, Put_Low_Level_C_Getter,
        which are no longer needed.  Rename
        Put_High_Level_C_Getter-->Put_C_Getter.
        * atree.ads, atree.adb: Take into account the header slots.
        Take into account the single Node_Or_Entity_Field type.  Remove
        "pragma Assertion_Policy (Ignore);", because the routines in
        this package are no longer efficiency critical.
        * atree.h: Remove low-level getters, which are no longer used by
        sinfo.h and einfo.h.
        * einfo-utils.adb: Avoid crash in Known_Alignment.
        * live.adb, sem_eval.adb: Remove code that prevents Node_Id from
        having a predicate.  We don't actually add a predicate to
        Node_Id, but we want to be able to for temporary debugging.
        * sinfo-utils.adb: Remove code that prevents Node_Id from having
        a predicate.  Take into account the single Node_Or_Entity_Field
        type.
        * sinfo-utils.ads: Minor.
        * table.ads (Table_Type): Make the components aliased, because
        low-level setters in Atree need to take 'Access.
        * treepr.adb: Take into account the single Node_Or_Entity_Field
        type.  Make some code more robust, so we can print out
        half-baked nodes.
        * types.ads: Move types here for visibility purposes.
        * gcc-interface/gigi.h, gcc-interface/trans.c: Take into account
        the Node_Header change in the GNAT front end.
        * gcc-interface/cuintp.c, gcc-interface/targtyps.c: Add because
        gigi.h now refers to type Node_Header, which is in sinfo.h.

2021-09-23  Yannick Moy  <moy@adacore.com>

        * libgnat/a-strfix.adb (Delete, Insert, Overwrite,
        Replace_Slice): Remove SPARK_Mode Off.
        * libgnat/a-strfix.ads (Insert, Overwrite, Replace_Slice):
        Strengthen precondition.

2021-09-23  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-strbou.ads (Generic_Bounded_Length): Remove non-null
        Global contracts.

2021-09-23  Steve Baird  <baird@adacore.com>

        * doc/gnat_rm/implementation_defined_characteristics.rst: Update
        this section to reflect the current version of Ada RM M.2.
        * gnat_rm.texi: Regenerate.

2021-09-22  Yannick Moy  <moy@adacore.com>

        * libgnat/a-strfix.ads (Trim): Simplify contracts.
        * libgnat/a-strfix.adb (Trim): Remove white space.

2021-09-22  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Expand_N_Op_Eq): Reuse Is_Attribute_Result.
        * exp_prag.adb (Expand_Attributes): Reuse Is_Attribute_Old.

2021-09-22  Yannick Moy  <moy@adacore.com>

        * sem_ch3.adb (Analyze_Object_Declaration): Do not insert a
        predicate check after a deferred constant declaration.

2021-09-22  Bob Duff  <duff@adacore.com>

        * contracts.adb, einfo-utils.adb, einfo-utils.ads, exp_ch7.adb,
        exp_ch9.adb, exp_disp.adb, exp_prag.adb, exp_smem.adb,
        exp_util.adb, freeze.adb, sem_aggr.adb, sem_attr.adb,
        sem_ch8.adb, sem_prag.ads, sem_util.adb, sem_util.ads: Fix
        conformance errors.
        * errout.adb, erroutc.adb: Remove pragmas Suppress.
        * err_vars.ads: Initialize variables that were previously being
        read uninitialized.

2021-09-22  Yannick Moy  <moy@adacore.com>

        * libgnat/a-strunb.ads: Mark package in SPARK with private part
        not in SPARK.
        (Free): Mark not in SPARK.

2021-09-22  Arnaud Charlet  <charlet@adacore.com>

        * snames.ads-tmpl: Update status of some attributes.

2021-09-22  Doug Rupp  <rupp@adacore.com>

        * libgnarl/s-interr__vxworks.adb (Interfaces.C): Remove as
        unused.
        (System.VxWorks.Ext): Import.
        (System.VxWorks.Ext.STATUS): use type.
        (STATUS): New subtype.
        (OK): New constant.
        (Interrupt_Connector): Return STATUS type vice int.
        (Interrupt_Connect, Notify_Interrupt, Unbind_Handler,
        Interrupt_Server_Task): Rename Status to Result. Assert Result =
        OK.
        * libgnarl/s-osinte__vxworks.adb (To_Clock_Ticks): Define constant
        IERR, and return it vice ERROR.
        (Binary_Semaphore_Delete): Return STATUS type vice int.
        (Binary_Semaphore_Obtain): Likewise.
        (Binary_Semaphore_Release): Likewise.
        (Binary_Semaphore_Flush): Likewise.
        * libgnarl/s-osinte__vxworks.ads (SVE): Renaming of
        System.VxWorks.Ext.
        (STATUS): Use SVE in declaration of subtype.
        (BOOL): Likewise.
        (vx_freq_t): Likewise.
        (t_id): Likewise.
        (gitpid): Use SVE in renaming of subprogram
        (Task_Stop): Likewise.
        (Task_Cont): Likewise.
        (Int_Lock): Likewise.
        (Int_Unlock): Likewise.
        (Set_Time_Slice): Likewise.
        (semDelete): Likewise.
        (taskCpuAffinitySet): Likewise.
        (taskMaskAffinitySet): Likewise.
        (sigset_t): Use SVE in declaration of type.
        (OK): Remove as unused.
        (ERROR): Likewise.
        (taskOptionsGet): return STATUS vice int.
        (taskSuspend): Likewise.
        (taskResume): Likewise.
        (taskDelay): Likewise.
        (taskVarAdd): Likewise.
        (taskVarDelete): Likewise.
        (taskVarSet): Likewise.
        (tlkKeyCreate): Likewise.
        (taskPrioritySet): Likewise.
        (semGive): Likewise.
        (semTake): Likewise.
        (Binary_Semaphore_Delete): Likewise.
        (Binary_Semaphore_Obtain): Likewise.
        (Binary_Semaphore_Release): Likewise.
        (Binary_Semaphore_Flush): Likewise.
        (Interrupt_Connect): Likewise.
        * libgnarl/s-taprop__vxworks.adb
        (System.VxWorks.Ext.STATUS): use type.
        (int): Syntactically align subtype.
        (STATUS): New subtype.
        (OK): New constant.
        (Finalize_Lock): Check STATUS vice int. Assert OK.
        (Finalize_Lock): Likewise.
        (Write_Lock): Likewise.
        (Write_Lock): Likewise.
        (Write_Lock): Likewise.
        (Unlock): Likewise.
        (Unlock): Likewise.
        (Unlock): Likewise.
        (Unlock): Likewise.
        (Sleep): Likewise.
        (Sleep): Likewise.
        (Sleep): Likewise.
        (Timed_Sleep): Likewise and test Result.
        (Timed_Delay): Likewise and test Result.
        (Wakeup): Likewise.
        (Yield): Likewise.
        (Finalize_TCB): Likewise.
        (Suspend_Until_True): Check OK.
        (Stop_All_Tasks): Declare Dummy STATUS vice in.  Check OK.
        (Is_Task_Context): Use OSI renaming.
        (Initialize): Use STATUS vice int.
        * libgnarl/s-vxwext.adb
        (IERR): Renamed from ERROR.
        (taskCpuAffinitySet): Return IERR (int).
        (taskMaskAffinitySet): Likewise.
        * libgnarl/s-vxwext.ads
        (STATUS): New subtype.
        (OK): New STATUS constant.
        (ERROR): Likewise.
        * libgnarl/s-vxwext__kernel-smp.adb
        (IERR): Renamed from ERROR.
        (Int_Lock): Return IERR.
        (semDelete): Return STATUS.
        (Task_Cont): Likewise.
        (Task_Stop): Likewise.
        * libgnarl/s-vxwext__kernel.adb
        (IERR): Renamed from ERROR.
        (semDelete): Return STATUS.
        (Task_Cont): Likewise.
        (Task_Stop): Likewise.
        (taskCpuAffinitySet): Return IERR (int)
        (taskMaskAffinitySet): Likewise.
        * libgnarl/s-vxwext__kernel.ads
        (STATUS): New subtype.
        (OK): New STATUS constant.
        (ERROR): Likewise.
        (Interrupt_Connect): Return STATUS
        (semDelete): Likewise.
        (Task_Cont): Likewise.
        (Task_Stop): Likewise.
        (Set_Time_Slice): Likewise.
        * libgnarl/s-vxwext__rtp-smp.adb
        (IERR): Renamed from ERROR.
        (Int_Lock): return IERR constant vice ERROR.
        (Interrupt_Connect): Return STATUS.
        (semDelete): Likewise.
        (Set_Time_Slice): Likewise.
        * libgnarl/s-vxwext__rtp.adb
        (IERR): Renamed from ERROR.
        (Int_Lock): return IERR constant vice ERROR.
        (Int_Unlock): Return STATUS.
        (semDelete): Likewise.
        (Set_Time_Slice): Likewise.
        (taskCpuAffinitySet): Return IERR (int)
        (taskMaskAffinitySet): Likewise.
        * libgnarl/s-vxwext__rtp.ads
        (STATUS): New subtype.
        (OK): New STATUS constant.
        (ERROR): Likewise.
        (Interrupt_Connect): Return STATUS
        (semDelete): Likewise.
        (Task_Cont): Likewise.
        (Task_Stop): Likewise.
        (Set_Time_Slice): Likewise.

2021-09-22  Arnaud Charlet  <charlet@adacore.com>

        * prep.adb (Preprocess): Allow for more flexibility when
        Relaxed_RM_Semantics is set.

2021-09-22  Pierre-Alexandre Bazin  <bazin@adacore.com>

        * libgnat/a-strbou.adb: Turn SPARK_Mode on.
        * libgnat/a-strbou.ads: Write contracts.
        * libgnat/a-strfix.ads (Index): Fix grammar error in a comment.
        * libgnat/a-strsea.ads (Index): Likewise.
        * libgnat/a-strsup.adb: Rewrite the body to take into account
        the new definition of Super_String using Relaxed_Initialization
        and a predicate.
        (Super_Replicate, Super_Translate, Times): Added loop
        invariants, and ghost lemmas for Super_Replicate and Times.
        (Super_Trim): Rewrite the body using search functions to
        determine the cutting points.
        (Super_Element, Super_Length, Super_Slice, Super_To_String):
        Remove (now written as expression functions in a-strsup.ads).
        * libgnat/a-strsup.ads: Added contracts.
        (Super_Element, Super_Length, Super_Slice, Super_To_String):
        Rewrite as expression functions.

2021-09-22  Yannick Moy  <moy@adacore.com>

        * sem_ch13.adb (Build_Predicate_Functions): Add guard.

2021-09-22  Doug Rupp  <rupp@adacore.com>

        * libgnarl/s-vxwext.ads (BOOL): New int type.
        (Interrupt_Context): Change return type to BOOL.
        * libgnarl/s-vxwext__kernel.ads: Likewise.
        * libgnarl/s-vxwext__rtp-smp.adb: Likewise.
        * libgnarl/s-vxwext__rtp.adb: Likewise.
        * libgnarl/s-vxwext__rtp.ads: Likewise.
        * libgnarl/s-osinte__vxworks.adb (Interrupt_Context): Change
        return type to BOOL.
        * libgnarl/s-osinte__vxworks.ads (BOOL) New subtype.
        (taskIsSuspended): Change return type to BOOL.
        (Interrupt_Context): Change return type to BOOL. Adjust comments
        accordingly.
        * libgnarl/s-taprop__vxworks.adb (System.VxWorks.Ext.BOOL):
        use type.
        (Is_Task_Context): Test Interrupt_Context against 0.
        * libgnat/i-vxwork.ads (BOOL): New int.
        (intContext): Change return type to BOOL. Adjust comments.
        * libgnat/i-vxwork__x86.ads: Likewise.

2021-09-22  Piotr Trojanek  <trojanek@adacore.com>

        * sem_aux.adb, sem_aux.ads (Package_Body): Moved from GNATprove.
        * sem_elab.adb (Spec_And_Body_From_Entity): Refine type of parameter.

2021-09-22  Arnaud Charlet  <charlet@adacore.com>

        * doc/gnat_ugn/platform_specific_information.rst: Improve doc
        on permission and containers.
        * gnat_ugn.texi: Regenerate.

2021-09-22  Yannick Moy  <moy@adacore.com>

        * atree.adb (Rewrite): Fix parent node of shared aspects.
        * atree.ads (Rewrite): Add ??? comment on incorrect
        documentation.
        * einfo-utils.adb (Known_Esize): Fix logic.
        * sem_ch13.adb (Alignment_Check_For_Size_Change,
        Analyze_Attribute_Definition_Clause): Protect against unset
        Size.

2021-09-22  Yannick Moy  <moy@adacore.com>

        * freeze.adb (Build_Renamed_Body): Special case for GNATprove.
        * sem_ch6.adb (Analyze_Expression_Function): Remove useless test
        for a node to come from source, which becomes harmful otherwise.

2021-09-22  Justin Squirek  <squirek@adacore.com>

        * ali.adb, ali.ads (Scan_ALI): Remove use of deprecated
        parameter Ignore_ED, and all specification for Lower in call to
        Get_File_Name.
        * ali-util.adb (Read_Withed_ALIs): Modify call to Scan_ALI.
        * clean.adb (Clean_Executables): Likewise.
        * gnatbind.adb (Add_Artificial_ALI_File, Executable section):
        Likewise.
        * gnatlink.adb (Executable section): Likewise.
        * gnatls.adb (Executable section): Likewise.
        * make.adb (Check, Wait_For_Available_Slot): Likewise.
        * aspects.ads: Add Aspect_No_Controlled_Parts to
        Nonoverridable_Aspect_Id
        * opt.ads: Remove function pointers used as a workaround for
        ASIS.
        * osint-c.adb (Executable section): Remove setting of function
        pointer workarounds needed for ASIS.
        * osint.adb (Read_Default_Search_Dirs): Correct behavior to
        detect EOL characters.
        * par_sco.adb (Output_Header): Remove comment regarding use of
        First_Sloc.
        (Traverse_Sync_Definition): Renamed to
        Traverse_Protected_Or_Task_Definition.
        * pprint.adb (Interal_List_Name): Add description about purpose,
        and refactor conditional statement.
        (Prepend): Removed.
        * repinfo.adb (List_Rep_Info, Write_Info_Line): Remove use of
        subprogram pointer.
        * scng.adb (Scan): Remove CODEFIX question, and minor comment
        change.
        * sem_attr.adb (Analyze_Image_Attribute): Remove special
        processing for 'Img.
        * sem_ch6.adb (Check_Untagged_Equality): Add RM reference.
        (FCE): Add comment describing behavior.
        (Is_Non_Overriding_Operation): Minor comment formatting change.
        * sem_type.adb (Is_Actual_Subprogram): Add comment about
        Comes_From_Source test.
        (Matching_Types): Describe non-matching cases.
        * sem_util.adb (Is_Confirming): Add stub case for
        No_Controlled_Parts.

2021-09-22  Yannick Moy  <moy@adacore.com>

        * sem_ch13.adb (Build_Predicate_Functions): Access
        Predicated_Parent only on subtypes.

2021-09-22  Arnaud Charlet  <charlet@adacore.com>

        * sem_prag.adb (Process_Import_Or_Interface): Relax error when
        Relaxed_RM_Semantics.

2021-09-22  Steve Baird  <baird@adacore.com>

        * libgnat/s-regpat.adb (Match): Handle the case where Self.First
        is not NUL (so we know the first character we are looking for),
        but case-insensitive matching has
        been specified.
        (Optimize): In the case of an EXACTF Op, set Self.First as is
        done in the EXACT case, except with the addition of a call to
        Lower_Case.

2021-09-22  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-imenne.ads, libgnat/s-imenne.adb: Delete.
        * gcc-interface/Make-lang.in (GNAT_ADA_OBJS): Remove s-imenne.o.
        (GNATBIND_OBJS): Likewise.

2021-09-22  Yannick Moy  <moy@adacore.com>

        * einfo.ads: Fix comments.
        * exp_aggr.adb: Fix variable name.
        * exp_util.adb: Fix comments.
        * sem_ch13.adb: Fix comments.
        * sem_ch3.adb: Fix comments and variable name.

2021-09-22  Doug Rupp  <rupp@adacore.com>

        * libgnarl/s-osinte__vxworks.ads: Make procedure vice function.
        * libgnarl/s-vxwext.ads: Likewise.
        * libgnarl/s-vxwext__kernel-smp.adb: Likewise.
        * libgnarl/s-vxwext__kernel.adb: Likewise.
        * libgnarl/s-vxwext__kernel.ads: Likewise.
        * libgnarl/s-vxwext__rtp-smp.adb: Likewise.
        * libgnarl/s-vxwext__rtp.adb: Likewise.
        * libgnarl/s-vxwext__rtp.ads: Likewise.
        * libgnarl/s-taprop__vxworks.adb (Stop_All_Tasks): Call
        Int_Unlock as a procedure.

2021-09-22  Doug Rupp  <rupp@adacore.com>

        * libgnarl/s-osinte__vxworks.ads (SVE): New package renaming
        (vx_freq_t): New subtype.
        (sysClkRateGet): Return vx_freq_t.
        * libgnarl/s-vxwext.ads (vx_freq_t): New type.
        * libgnarl/s-vxwext__kernel.ads: Likewise.
        * libgnarl/s-vxwext__rtp.ads: Likewise.

2021-09-22  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_case.adb (Composite_Case_Ops): Replace 'Image with
        Error_Msg_Uint.

2021-09-22  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_ch4.adb (Expand_N_If_Expression): Generate an intermediate
        temporary when the expression is a condition in an outer decision
        and control-flow optimizations are suppressed.

2021-09-22  Steve Baird  <baird@adacore.com>

        * exp_ch5.adb (Expand_General_Case_Statement.Pattern_Match): Add
        new function Indexed_Element to handle array element
        comparisons. Handle case choices that are array aggregates,
        string literals, or names denoting constants.
        * sem_case.adb (Composite_Case_Ops.Array_Case_Ops): New package
        providing utilities needed for casing on arrays.
        (Composite_Case_Ops.Choice_Analysis): If necessary, include
        array length as a "component" (like a discriminant) when
        traversing components. We do not (yet) partition choice analysis
        to deal with unequal length choices separately. Instead, we
        embed everything in the minimum-dimensionality Cartesian product
        space needed to handle all choices properly; this is determined
        by the length of the longest choice pattern.
        (Composite_Case_Ops.Choice_Analysis.Traverse_Discrete_Parts):
        Include length as a "component" in the traversal if necessary.
        (Composite_Case_Ops.Choice_Analysis.Parse_Choice.Traverse_Choice):
        Add support for case choices that are string literals or names
        denoting constants.
        (Composite_Case_Ops.Choice_Analysis): Include length as a
        "component" in the analysis if necessary.
        (Check_Choices.Check_Case_Pattern_Choices.Ops.Value_Sets.Value_Index_Count):
        Improve error message when capacity exceeded.
        * doc/gnat_rm/implementation_defined_pragmas.rst: Update
        documentation to reflect current implementation status.
        * gnat_rm.texi: Regenerate.

2021-09-22  Eric Botcazou  <ebotcazou@adacore.com>

        * freeze.adb (Check_Component_Storage_Order): Give a specific error
        message for non-byte-aligned component in the packed case.  Replace
        "composite" with "record" in both cases.

2021-09-22  Arnaud Charlet  <charlet@adacore.com>

        * libgnarl/a-tasini.ads, libgnarl/a-tasini.adb: Make compatible
        with No_Elaboration_Code_All.
        * libgnarl/s-taskin.ads, libgnarl/s-tassta.adb: Adjust
        accordingly.

2021-09-22  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch6.adb (Check_Returns): Change message on missing return.

2021-09-22  Arnaud Charlet  <charlet@adacore.com>

        * gnatfind.adb, gnatxref.adb: Mark these tools as obsolete
        before removing them completely.

2021-09-22  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (range_cannot_be_superflat): Tweak comments.

2021-09-21  Doug Rupp  <rupp@adacore.com>

        * init.c (__gnat_error_handler) [LynxOS]: Add a comment about
        missing optional args.

2021-09-21  Yannick Moy  <moy@adacore.com>

        * gen_il-gen.adb (Put_Opt_Subtype): Add suffix.

2021-09-21  Justin Squirek  <squirek@adacore.com>

        * sem_util.adb (Accessibility_Level): Remove spurious special
        case for protected type components.
        * exp_ch4.adb (Generate_Accessibility_Check): Use general
        Accessibility_Level instead of the low-level function
        Type_Access_Level.

2021-09-21  Eric Botcazou  <ebotcazou@adacore.com>

        * gnat_ugn.texi: Regenerate.

2021-09-21  Matthieu Eyraud  <eyraud@adacore.com>

        * par_sco.adb (Traverse_One): Add support for pragma Invariant /
        Type_Invariant.

2021-09-21  Bob Duff  <duff@adacore.com>

        * gen_il-gen.adb (Put_Opt_Subtype): Print out subtypes of the
        form:
        subtype Opt_N_Declaration is
        Node_Id with Predicate =>
        Opt_N_Declaration = Empty or else
        Opt_N_Declaration in N_Declaration_Id;
        One for each node or entity type, with the predicate allowing
        Empty.
        * atree.adb (Parent, Set_Parent): Remove unnecessary "Atree.".

2021-09-21  Patrick Bernardi  <bernardi@adacore.com>

        * bindgen.adb (Gen_Adainit): For targets that suppress the
        standard library: set the default stack size global variable if
        a value is provided via the -d switch, and generate a call to
        __gnat_initialize_stack_limit if stack checking using stack
        limits is enabled.

2021-09-21  Bob Duff  <duff@adacore.com>

        * sem_ch13.adb (Stream_Size): Print message about allowed stream
        sizes even if other error were already found. This avoids
        falling into the 'else', which prints "Stream_Size cannot be
        given for...", which is misleading -- the Size COULD be given if
        it were correct.

2021-09-21  Daniel Mercier  <mercier@adacore.com>

        * exp_util.adb (Build_Temporary): In case of an external DISCR
        symbol, set the related expression for CodePeer so that a more
        comprehensible message can be emitted to the user.

2021-09-21  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-dwalin.adb (Parse_Header): Tweak comments.
        (Read_Entry_Format_Array): Tweak exception message.
        (Symbolic_Address.Set_Result): Likewise.

2021-09-21  Ed Schonberg  <schonberg@adacore.com>

        * exp_ch7.adb (Make_Init_Call): Add guard to protect against a
        missing initialization procedure for a type.

2021-09-21  Doug Rupp  <rupp@adacore.com>

        * Makefile.rtl: Remove unused VxWorks sections.
        * libgnarl/s-vxwext__noints.adb: Remove.
        * libgnarl/s-vxwext__vthreads.ads: Remove.
        * libgnat/a-elchha__vxworks-ppc-full.adb: Remove.
        * libgnat/s-osprim__vxworks.adb: Remove.
        * libgnat/s-osvers__vxworks-653.ads: Remove.
        * libgnat/system-vxworks-e500-vthread.ads: Remove.
        * libgnat/system-vxworks-ppc-vthread.ads: Remove.
        * libgnat/system-vxworks-x86-vthread.ads: Remove.

2021-09-21  Bob Duff  <duff@adacore.com>

        * uintp.ads, uintp.adb (UI_Is_In_Int_Range): Change the type of
        the formal parameter to Valid_Uint. Remove code that preserved
        the previous behavior, and replace it with an assertion. The
        previous behavior is no longer needed given the recent change to
        gigi.
        (No, Present): Add comment.

2021-09-21  Bob Duff  <duff@adacore.com>

        * sem_eval.adb (Fold_Shift): Replace an if_expression with an
        if_statement.

2021-09-21  Bob Duff  <duff@adacore.com>

        * uintp.ads, uintp.adb: Add assertions.
        (Ubool, Opt_Ubool): New "boolean" subtypes.
        (UI_Is_In_Int_Range): The parameter should probably be
        Valid_Uint, but we don't change that for now, because it causes
        failures in gigi.
        * sem_util.ads, sem_util.adb (Is_True, Is_False,
        Static_Boolean): Use Opt_Ubool subtype.  Document the fact that
        Is_True (No_Uint) = True.  Implement Is_False in terms of
        Is_True.  We considered changing Static_Boolean to return Uint_1
        in case of error, but that doesn't fit in well with
        Static_Integer.
        (Has_Compatible_Alignment_Internal): Deal with cases where Offs
        is No_Uint. Change one "and" to "and then" to ensure we don't
        pass No_Uint to ">", which would violate the new assertions.
        * exp_util.adb, freeze.adb, sem_ch13.adb: Avoid violating new
        assertions in Uintp.

2021-09-21  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-dwalin.adb (To_File_Name): Fetch only the last string
        from the .debug_line_str section.
        (Symbolic_Address.Set_Result): Likewise.

2021-09-21  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-dwalin.adb (Skip_Form): Fix cases of DW_FORM_addrx
        and DW_FORM_implicit_const.  Replace Constraint_Error with
        Dwarf_Error.

2021-09-21  Ghjuvan Lacambre  <lacambre@adacore.com>

        * exp_pakd.adb (Expand_Packed_Not): Replace expression with
        statement.

2021-09-21  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_eval.adb (Is_Static_Subtype): Take predicates created
        through "predicate" pragma into account.

2021-09-21  Frederic Konrad  <konrad@adacore.com>

        * Makefile.rtl (aarch64-rtems*): Add GNATRTL_128BIT_PAIRS to
        the LIBGNAT_TARGET_PAIRS list and also GNATRTL_128BIT_OBJS to
        the EXTRA_GNATRTL_NONTASKING_OBJS list.

2021-09-21  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch4.adb (Remove_Abstract_Operations): Add condition to
        test for an E_Operator as part of criteria for setting
        Abstract_Op on interpretations involving predefined operators.

2021-09-21  Javier Miranda  <miranda@adacore.com>

        * exp_ch6.adb (Expand_Simple_Function_Return): For explicit
        dereference of type conversion, enable code that ensures that
        the tag of the result is that of the result type.

2021-09-21  Bob Duff  <duff@adacore.com>

        * einfo-utils.adb: Add support (currently disabled) for using
        "initial zero" instead of "Uint_0" to represent "unknown".  Call
        Known_ functions, instead of evilly duplicating their code
        inline.
        * fe.h (No_Uint_To_0): New function to convert No_Uint to
        Uint_0, in order to preserve existing behavior.
        (Copy_Esize, Copy_RM_Size): New imports from Einfo.Utils.
        * cstand.adb: Set size fields of Standard_Debug_Renaming_Type
        and Standard_Exception_Type.
        * checks.adb, exp_attr.adb, exp_ch3.adb, exp_ch5.adb,
        exp_ch6.adb, exp_pakd.adb, exp_util.adb, freeze.adb, itypes.adb,
        layout.adb, repinfo.adb, sem_attr.adb, sem_ch12.adb,
        sem_ch13.adb, sem_ch13.ads, sem_ch3.adb, sem_ch7.adb,
        sem_util.adb: Protect calls with Known_..., use Copy_...  Remove
        assumption that Uint_0 represents "unknown".
        * types.ads (Nonzero_Int): New subtype.
        * gcc-interface/decl.c, gcc-interface/trans.c: Protect calls
        with Known_... and use Copy_...  as appropriate, to avoid
        blowing up in unknown cases. Similarly, call No_Uint_To_0 to
        preserve existing behavior.

2021-09-21  Steve Baird  <baird@adacore.com>

        * sem_ch13.adb (Analyze_Aspect_Specifications): Add a new nested
        function, Directly_Specified, and then use it in the
        implementation of the required check.

2021-09-21  Steve Baird  <baird@adacore.com>

        * libgnat/a-costso.ads, libgnat/a-costso.adb: A new library
        unit, Ada.Containers.Stable_Sorting, which exports a pair of
        generics (one within the other) which are instantiated by each
        of the 5 doubly-linked list container generics to implement
        their respective Sort procedures. We use a pair of generics,
        rather than a single generic, in order to further reduce code
        duplication. The outer generic takes a formal private Node_Ref
        type representing a reference to a linked list element. For some
        instances, the corresponding actual parameter will be an access
        type; for others, it will be the index type for an array.
        * Makefile.rtl: Include new Ada.Containers.Stable_Sorting unit.
        * libgnat/a-cbdlli.adb, libgnat/a-cdlili.adb,
        libgnat/a-cfdlli.adb, libgnat/a-cidlli.adb, libgnat/a-crdlli.adb
        (Sort): Replace existing Sort implementation with a call to an
        instance of
        Ada.Containers.Stable_Sorting.Doubly_Linked_List_Sort. Declare
        the (trivial) actual parameters needed to declare that instance.
        * libgnat/a-cfdlli.ads: Fix a bug encountered during testing in
        the postcondition for M_Elements_Sorted. With a partial
        ordering, it is possible for all three of (X < Y), (Y < X),
        and (X = Y) to be simultaneously false, so that case needs to
        handled correctly.

2021-09-21  Piotr Trojanek  <trojanek@adacore.com>

        * errout.adb (Error_Msg_Internal): Fix references to Sptr and
        Optr in comment; fix grammar of "low-level" where it is used as
        an adjective.

2021-09-21  Piotr Trojanek  <trojanek@adacore.com>

        * errout.adb (Write_Source_Code_Lines): Use Cur_Loc before
        incrementing it, so that we don't need to decrement it.

2021-09-21  Yannick Moy  <moy@adacore.com>

        * errout.adb (Get_Line_End): Do not allow the result to go past
        the end of the buffer.

2021-09-21  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch3.adb (Process_Discriminant_Expressions): If the
        constraint is for a Component_Definition that appears in a
        Component_Declaration, the entity to be used to create the
        potentially global symbol is the Defining_Identifier of the
        Component_Declaration.

2021-09-21  Bob Duff  <duff@adacore.com>

        * libgnat/a-stbufi.ads, libgnat/a-stbufi.adb: Change all
        occurrences of GNAT.OS_Lib to System.OS_Lib.

2021-09-20  Piotr Trojanek  <trojanek@adacore.com>

        * inline.adb (Has_Excluded_Declaration): Remove redundant guard;
        the guarded code will call First on a No_List, which is
        well-defined and gives Empty.

2021-09-20  Piotr Trojanek  <trojanek@adacore.com>

        * inline.adb (Has_Excluded_Declaration): Rename and reduce scope
        of a local variable.

2021-09-20  Bob Duff  <duff@adacore.com>

        * uintp.ads, uintp.adb (Present, No): New functions for
        comparing with No_Uint.
        * checks.adb, einfo-utils.adb, exp_aggr.adb, exp_attr.adb,
        exp_ch3.adb, exp_ch4.adb, exp_dbug.adb, exp_disp.adb,
        exp_util.adb, repinfo.adb, repinfo-input.adb, scn.adb,
        sem_attr.adb, sem_ch13.adb, sem_eval.adb, sem_util.adb,
        sinfo-utils.adb, treepr.adb: Use Present (...) instead of "...
        /= No_Uint", and No (...) instead of "... = No_Uint".

2021-09-20  Claire Dross  <dross@adacore.com>

        * libgnat/s-ficobl.ads: The entire package has a SPARK_Mode =>
        Off aspect.

2021-09-20  Doug Rupp  <rupp@adacore.com>

        * libgnat/a-calend.adb: Remove time_t, replace with OS_Time.
        * libgnat/s-os_lib.ads: Fix comments regarding time_t conversion
        functions to reflect the use of To_Ada in in Ada.Calendar
        package body.
        * sysdep.c (__gnat_localtime_tzoff): Use OS_Time instead of
        time_t.

2021-09-20  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Resolve_Actual): Remove

2021-09-20  Bob Duff  <duff@adacore.com>

        * einfo-utils.ads, einfo-utils.adb, fe.h, einfo.ads,
        gen_il-fields.ads: Remove unused and no-longer-used routines.
        Move related routines together.  Rewrite incorrect
        documentation, and documentation that will be incorrect when
        e.g. Esize-related routines are fixed.  Remove unused field
        Normalized_Position_Max.
        * cstand.adb, exp_pakd.adb, freeze.adb,
        gen_il-gen-gen_entities.adb, itypes.adb, layout.adb,
        sem_ch10.adb, sem_ch12.adb, sem_ch13.adb, sem_ch3.adb,
        sem_ch7.adb, sem_ch8.adb, sem_ch9.adb, sem_prag.adb,
        sem_util.adb, ttypes.ads: Update calls to routines removed from
        or renamed in Einfo.Utils.
        * uintp.ads (Upos): Fix this subtype, which was unintentionally
        declared to include Uint_0.

2021-09-20  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch7.adb (Expand_N_Package_Declaration): Fix wording in
        comment.
        * exp_disp.adb (Mark_DT): Remove unnecessary initialization of
        I_Depth.

2021-09-20  Piotr Trojanek  <trojanek@adacore.com>

        * contracts.adb (Add_Contract_Item): Accept volatile-related
        properties on constants.
        (Analyze_Object_Contract): Check external properties on
        constants; accept volatile constants.
        (Check_Type_Or_Object_External_Properties): Replace "variable"
        with "object" in error messages; replace Decl_Kind with a local
        constant.
        * sem_prag.adb (Analyze_Pragma): Accept volatile-related
        properties on constants.

2021-09-20  Pierre-Alexandre Bazin  <bazin@adacore.com>

        * libgnat/a-strfix.adb ("*"): Added loop invariants and lemmas
        for proof.
        (Delete): Added assertions for proof, and conditions to avoid
        overflow.
        (Head): Added loop invariant.
        (Insert): Same as Delete.
        (Move): Declared with SPARK_Mode Off.
        (Overwrite): Added assertions for proof, and conditions to avoid
        overflow.
        (Replace_Slice): Added assertions for proof, and conditions to
        avoid overflow.
        (Tail): Added loop invariant and avoided overflows.
        (Translate): Added loop invariants.
        (Trim): Ensured empty strings returned start at 1.
        * libgnat/a-strfix.ads (Index): Rewrote contract cases for
        easier proof.
        (Index_Non_Blank): Separated the null string case.
        (Count): Specified Mapping shouldn't be null.
        (Find_Token): Specified Source'First should be Positive when no
        From is given.
        (Translate): Specified Mapping shouldn't be null.
        ("*"): Rewrote postcondition for easier proof.
        * libgnat/a-strsea.adb (Belongs): Added postcondition.
        (Count): Rewrote loops and added loop invariants to avoid
        overflows.
        (Find_Token): Added loop invariants.
        (Index): Rewrote loops to avoid overflows and added loop
        invariants for proof.
        (Index_Non_Blank): Added loop invariants.
        (Is_Identity): New function isolated without SPARK_Mode.
        * libgnat/a-strsea.ads: Fix starting comment as package is no
        longer private.
        (Match): Declared ghost expression function Match.
        (Is_Identity): Described identity in the postcondition.
        (Index, Index_Non_Blank, Count, Find_Token): Added contract from
        a-strfix.ads.

2021-09-20  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch13.adb (Resolve_Aspect_Aggregate): Move comments after
        specs; fix typo in header box; cleanup whitespace.

2021-09-20  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-objrea.adb (Get_Load_Address): Return 0 for ELF.

2021-09-20  Eric Botcazou  <ebotcazou@adacore.com>

        * adaint.c (__gnat_get_executable_load_address): Add Win32 support.
        * libgnat/s-objrea.ads (Get_Xcode_Bounds): Fix typo in comment.
        (Object_File): Minor reformatting.
        (ELF_Object_File): Uncomment predicate.
        (PECOFF_Object_File): Likewise.
        (XCOFF32_Object_File): Likewise.
        * libgnat/s-objrea.adb: Minor reformatting throughout.
        (Get_Load_Address): Implement for PE-COFF.
        * libgnat/s-dwalin.ads: Remove clause for System.Storage_Elements
        and use consistent wording in comments.
        (Dwarf_Context): Set type of Low, High and Load_Address to Address.
        * libgnat/s-dwalin.adb (Get_Load_Displacement): New function.
        (Is_Inside): Call Get_Load_Displacement.
        (Low_Address): Likewise.
        (Open): Adjust to type change.
        (Aranges_Lookup): Change type of Addr to Address.
        (Read_Aranges_Entry): Likewise for Start and adjust.
        (Enable_Cach): Adjust to type change.
        (Symbolic_Address): Change type of Addr to Address.
        (Symbolic_Traceback): Call Get_Load_Displacement.

2021-09-20  Piotr Trojanek  <trojanek@adacore.com>

        * exp_disp.adb (Make_DT): Move call to Set_Has_Dispatch_Table,
        so it is executed regardless of the Generate_SCIL mode.

2021-09-20  Ed Schonberg  <schonberg@adacore.com>

        * exp_util.ads (Force_Evaluation): Add formal parameter
        Discr_Number, to indicate discriminant expression for which an
        external name must be created.
        (Remove_Side_Effects): Ditto.
        * exp_util.adb (Force_Evaluation): Call Remove_Side_Effects with
        added parameter.
        (Remove_Side_Effects, Build_Temporary): If Discr_Number is
        positive, create an external name with suffix DISCR and the
        given discriminant number, analogous to what is done for
        temporaries for array type bounds.
        * sem_ch3.adb (Process_Discriminant_Expressions): If the
        constraint is for an object or component declaration and the
        corresponding entity may be visible in another unit, invoke
        Force_Evaluation with the new parameter.

2021-09-20  Arnaud Charlet  <charlet@adacore.com>

        * gen_il-internals.ads (Invalid_Val): Remove, unused and
        generates warnings.

2021-09-20  Piotr Trojanek  <trojanek@adacore.com>

        * exp_aggr.adb, exp_ch4.adb, exp_ch5.adb, sprint.adb: Refine
        types of local constants.

2021-09-20  Gary Dismukes  <dismukes@adacore.com>

        * exp_attr.adb (Expand_N_Attribute_Reference): Fold
        Preelaborable_Initialization attribute in cases where it hasn't
        been folded by the analyzer.
        * exp_disp.adb (Original_View_In_Visible_Part): This function is
        removed and moved to sem_util.adb.
        * sem_attr.adb (Attribute_22): Add
        Attribute_Preelaborable_Initialization as an Ada 2022 attribute.
        (Analyze_Attribute, Attribute_Preelaborable_Initialization):
        Check that the prefix of the attribute is either a formal
        private or derived type, or a composite type declared within the
        visible part of a package or generic package.
        (Eval_Attribute): Perform folding of
        Preelaborable_Initialization attribute based on
        Has_Preelaborable_Initialization applied to the prefix type.
        * sem_ch3.adb (Resolve_Aspects): Add specialized code for
        Preelaborable_Initialization used at the end of a package
        visible part for setting Known_To_Have_Preelab_Init on types
        that are specified with True or that have a conjunction of one
        or more P_I attributes applied to formal types.
        * sem_ch7.adb (Analyze_Package_Specification): On call to
        Has_Preelaborable_Initialization, pass True for new formal
        Formal_Types_Have_Preelab_Init, so that error checking treats
        subcomponents that are declared within types in generics as
        having preelaborable initialization when the subcomponents are
        of formal types.
        * sem_ch13.adb (Analyze_Aspects_At_Freeze_Point): Add test for
        P_I to prevent calling Make_Pragma_From_Boolean_Aspect, since
        this aspect is handled specially and the
        Known_To_Have_Preelab_Init flag will get set on types that have
        the aspect by other means.
        (Analyze_Aspect_Specifications.Analyze_One_Aspect): Add test for
        Aspect_Preelaborable_Initialization for allowing the aspect to
        be specified on formal type declarations.
        (Is_Operational_Item): Treat Attribute_Put_Image as an
        operational attribute.  The need for this was encountered while
        working on these changes.
        * sem_util.ads (Has_Preelaborable_Initialization): Add
        Formal_Types_Have_Preelab_Init as a new formal parameter that
        defaults to False.
        (Is_Conjunction_Of_Formal_Preelab_Init_Attributes): New
        function.
        (Original_View_In_Visible_Part): Moved here from exp_disp.adb,
        so it can be called by Analyze_Attribute.
        * sem_util.adb (Has_Preelaborable_Initialization): Return True
        for formal private and derived types when new formal
        Formal_Types_Have_Preelab_Init is True, and pass along the
        Formal_Types_Have_Preelab_Init flag in the array component case.
        (Check_Components): Pass along Formal_Types_Have_Preelab_Init
        flag on call to Has_Preelaborable_Initialization.
        (Is_Conjunction_Of_Formal_Preelab_Init_Attributes): New function
        that returns True when passed an expression that includes one or
        more attributes for Preelaborable_Initialization applied to
        prefixes that denote formal types.
        (Is_Formal_Preelab_Init_Attribute): New utility function nested
        within Is_Conjunction_Of_Formal_Preelab_Init_Attributes that
        determines whether a node is a P_I attribute applied to a
        generic formal type.
        (Original_View_In_Visible_Part): Moved here from exp_util.adb,
        so it can be called by Analyze_Attribute.
        * snames.ads-tmpl: Add note near the start of spec giving
        details about what needs to be done when adding a name that
        corresponds to both an attribute and a pragma.  Delete existing
        occurrence of Name_Preelaborable_Initialization, and add a note
        comment in the list of Name_* constants at that place,
        indicating that it's included in type Pragma_Id, etc., echoing
        other such comments for names that are both an attribute and a
        pragma.  Insert Name_Preelaborable_Initialization in the
        alphabetized set of Name_* constants corresponding to
        attributes (between First_Attribute_Name and
        Last_Attribute_Name).
        (type Attribute_Id): Add new literal
        Attribute_Preelaborable_Initialization.
        (type Pragma_Id): Move Pragma_Preelaborable_Initialization from
        its current position to the end of the type, in the special set
        of pragma literals that have corresponding atttributes. Add to
        accompanying comment, indicating that functions Get_Pragma_Id
        and Is_Pragma_Name need to be updated when adding a pragma
        literal to the special set.
        * snames.adb-tmpl (Get_Pragma_Id): Add case alternative for
        Pragma_Preelaborable_Initialization.
        (Is_Pragma_Name): Add test for
        Name_Preelaborable_Initialization.

2021-09-20  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_ch4.adb (Finc_Non_Universal_Interpretations): Fix check.

2021-09-20  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch3.adb (Build_Discriminant_Constraints): Exit once a
        first discriminant is found and the Discrim_Present flag is set.

2021-09-20  Bob Duff  <duff@adacore.com>

        * gnat1drv.adb (Gnat1drv): Avoid calling List_Rep_Info in
        Generate_SCIL and GNATprove_Mode.
        * repinfo.adb (List_Common_Type_Info): Fix comment.

2021-09-20  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-dwalin.ads: Remove clause for Ada.Exceptions.Traceback,
        add clause for System.Traceback_Entries and alphabetize.
        (AET): Delete.
        (STE): New package renaming.
        (Symbolic_Traceback): Adjust.
        * libgnat/s-dwalin.adb: Remove clauses for Ada.Exceptions.Traceback
        and System.Traceback_Entries.
        (Symbolic_Traceback): Adjust.

2021-09-20  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_ch4.adb (Find_Non_Universal_Interpretations): Check if
        types are compatible before adding interpretation.

2021-09-20  Justin Squirek  <squirek@adacore.com>

        * exp_ch4.adb (Expand_N_Type_Conversion): Add guard to protect
        against calculating accessibility levels against internal
        compiler-generated types.

2021-09-20  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_dim.adb (Dimensions_Msg_Of): Capitalize comment.

2021-09-20  Ghjuvan Lacambre  <lacambre@adacore.com>

        * adabkend.adb (Scan_Back_End_Switches): Replace switch-scanning
        logic with call to Backend_Utils.Scan_Common_Back_End_Switches.
        * back_end.adb (Scan_Back_End_Switches): Replace switch-scanning
        logic with call to Backend_Utils.Scan_Common_Back_End_Switches.
        * backend_utils.adb: New file.
        * backend_utils.ads: New file.
        * gcc-interface/Make-lang.in: Add ada/backend_utils.o.

2021-09-20  Ghjuvan Lacambre  <lacambre@adacore.com>

        * atree.adb (Get_32_Bit_Field): Declare result before returning.

2021-09-20  Ghjuvan Lacambre  <lacambre@adacore.com>

        * exp_ch7.adb (Expand_N_Package_Body): Replace
        Build_And_Insert_Cuda_Initialization with Expand_CUDA_Package.
        * gnat_cuda.adb (Expand_CUDA_Package): New procedure.
        (Build_And_Insert_Cuda_Initialization): Make internal.
        * gnat_cuda.ads (Expand_CUDA_Package): New procedure.
        (Build_And_Insert_Cuda_Initialization): Remove from spec.

2021-09-20  Ghjuvan Lacambre  <lacambre@adacore.com>

        * usage.adb (Usage): Update -gnatw.c messages.

2021-09-20  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_aux.adb (Is_By_Reference_Type): Do not test Error_Posted.

2021-09-15  Alexandre Oliva  <oliva@adacore.com>

        * gcc-interface/utils.c: Include opts.h.
        (handle_zero_call_used_regs_attribute): New.
        (gnat_internal_attribute_table): Add zero_call_used_regs.

2021-09-14  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/101970
        * exp_attr.adb (Expand_N_Attribute_Reference) <Attribute_Enum_Rep>:
        Use an unchecked conversion instead of a regular conversion in the
        enumeration case and remove Conversion_OK flag in the integer case.
        <Attribute_Pos>: Remove superfluous test.

2021-09-14  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (validate_size): Do not issue an error if the
        old size has overflowed.

2021-09-14  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity): For vector types, make
        the representative array the debug type.

2021-09-14  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_subprog_type): Turn variable
        into constant.  Capitalize GCC in warning message.
        (intrin_arglists_compatible_p): Change parameter to pointer-to-const
        Adjust warning messages.  Turn warning into error for vector types.
        (intrin_return_compatible_p): Likewise.
        (intrin_profiles_compatible_p): Change parameter to pointer-to-const

2021-09-14  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-atopri.ads (bool): Delete.
        (Atomic_Test_And_Set): Replace bool with Boolean.
        (Atomic_Always_Lock_Free): Likewise.
        * libgnat/s-aoinar.adb (Is_Lock_Free): Adjust.
        * libgnat/s-aomoar.adb (Is_Lock_Free): Likewise.
        * libgnat/s-aotase.adb (Atomic_Test_And_Set): Likewise.
        * libgnat/s-atopex.adb (Atomic_Compare_And_Exchange): Likewise.
        * gcc-interface/decl.c: Include gimple-expr.h.
        (intrin_types_incompatible_p): Delete.
        (intrin_arglists_compatible_p): Call types_compatible_p.
        (intrin_return_compatible_p): Likewise.

2021-09-14  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/utils.c (update_pointer_to): Set TYPE_CANONICAL on
        pointer and reference types.

2021-09-14  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/101385
        * doc/gnat_ugn/building_executable_programs_with_gnat.rst
        (-Wall): Minor fixes.
        (-w): Likewise.
        (-Werror): Document that it also sets -gnatwe by default.
        * gcc-interface/lang-specs.h (ada): Expand -gnatwe if -Werror is
        passed and move expansion of -gnatw switches to before -gnatez.

2021-09-14  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/utils.c (can_materialize_object_renaming_p): Do not
        call UI_Is_In_Int_Range on the result of Normalized_First_Bit.

2021-09-14  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <is_type>: Declare new
        constant.  Adjust error message issued by validate_size in the case
        of by-reference types.
        (validate_size): Always use the error strings passed by the caller.

2021-09-08  liuhongt  <hongtao.liu@intel.com>

        * gcc-interface/misc.c (gnat_post_options): Issue an error for
        -fexcess-precision=16.

2021-08-19  Arnaud Charlet  <charlet@adacore.com>

        PR ada/101924
        * gcc-interface/Make-lang.in (STAGE1_LIBS): Define on hpux.

2021-08-18  Eric Botcazou  <ebotcazou@gcc.gnu.org>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <discrete_type>: Fix
        thinko in latest change.

2021-08-11  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR debug/101598
        * gcc-interface/trans.c (Subprogram_Body_to_gnu): Set the
        DECL_SOURCE_LOCATION of DECL_IGNORED_P gnu_subprog_decl to
        UNKNOWN_LOCATION.

2021-07-25  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/s-osprim__x32.adb: Add missing with clause.

2021-07-12  Pierre-Marie de Rodat  <derodat@adacore.com>

        * adaint.c (__gnat_number_of_cpus): Replace "#ifdef" by "#if
        defined".

2021-07-12  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <discrete_type>: Add a
        parallel type only when -fgnat-encodings=all is specified.
        <E_Array_Type>: Use the PAT name and special suffixes only when
        -fgnat-encodings=all is specified.
        <E_Array_Subtype>: Build a special type for debugging purposes only
        when -fgnat-encodings=all is specified.  Add a parallel type or use
        the PAT name only when -fgnat-encodings=all is specified.
        <E_Record_Type>: Generate debug info for the inner record types only
        when -fgnat-encodings=all is specified.
        <E_Record_Subtype>: Use a debug type for an artificial subtype only
        except when -fgnat-encodings=all is specified.
        (elaborate_expression_1): Reset need_for_debug when possible only
        except when -fgnat-encodings=all is specified.
        (components_to_record): Use XV encodings for variable size only
        when -fgnat-encodings=all is specified.
        (associate_original_type_to_packed_array): Add a parallel type only
        when -fgnat-encodings=all is specified.
        * gcc-interface/misc.c (gnat_get_array_descr_info): Do not return
        full information only when -fgnat-encodings=all is specified.
        * gcc-interface/utils.c (make_packable_type): Add a parallel type
        only when -fgnat-encodings=all is specified.
        (maybe_pad_type): Make the inner type a debug type only except when
        -fgnat-encodings=all is specified.  Create an XVS type for variable
        size only when -fgnat-encodings=all is specified.
        (rest_of_record_type_compilation): Add a parallel type only when
        -fgnat-encodings=all is specified.

2021-07-12  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <E_Array_Type>: Use a
        fixed lower bound if the index subtype is marked so, as well as a
        more efficient formula for the upper bound if the array cannot be
        superflat.
        (flb_cannot_be_superflat): New predicate.
        (cannot_be_superflat): Rename into...
        (range_cannot_be_superfla): ...this.  Minor tweak.

2021-07-12  Bob Duff  <duff@adacore.com>

        * uintp.ads, types.h: New subtypes of Uint: Valid_Uint, Unat,
        Upos, Nonzero_Uint with predicates. These correspond to new
        field types in Gen_IL.
        * gen_il-types.ads (Valid_Uint, Unat, Upos, Nonzero_Uint): New
        field types.
        * einfo-utils.ads, einfo-utils.adb, fe.h (Known_Alignment,
        Init_Alignment): Use the initial zero value to represent
        "unknown". This will ensure that if Alignment is called before
        Set_Alignment, the compiler will blow up (if assertions are
        enabled).
        * atree.ads, atree.adb, atree.h, gen_il-gen.adb
        (Get_Valid_32_Bit_Field): New generic low-level getter for
        subtypes of Uint.
        (Copy_Alignment): New procedure to copy Alignment field even
        when Unknown.
        (Init_Object_Size_Align, Init_Size_Align): Do not bypass the
        Init_ procedures.
        * exp_pakd.adb, freeze.adb, layout.adb, repinfo.adb,
        sem_util.adb: Protect calls to Alignment with Known_Alignment.
        Use Copy_Alignment when it might be unknown.
        * gen_il-gen-gen_entities.adb (Alignment,
        String_Literal_Length): Use type Unat instead of Uint, to ensure
        that the field is always Set_ before we get it, and that it is
        set to a nonnegative value.
        (Enumeration_Pos): Unat.
        (Enumeration_Rep): Valid_Uint. Can be negative, but must be
        valid before fetching.
        (Discriminant_Number): Upos.
        (Renaming_Map): Remove.
        * gen_il-gen-gen_nodes.adb (Char_Literal_Value, Reason): Unat.
        (Intval, Corresponding_Integer_Value): Valid_Uint.
        * gen_il-internals.ads: New functions for dealing with special
        defaults and new subtypes of Uint.
        * scans.ads: Correct comments.
        * scn.adb (Post_Scan): Do not set Intval to No_Uint; that is no
        longer allowed.
        * sem_ch13.adb (Analyze_Enumeration_Representation_Clause): Do
        not set Enumeration_Rep to No_Uint; that is no longer allowed.
        (Offset_Value): Protect calls to Alignment with Known_Alignment.
        * sem_prag.adb (Set_Atomic_VFA): Do not use Uint_0 to mean
        "unknown"; call Init_Alignment instead.
        * sinfo.ads: Minor comment fix.
        * treepr.adb: Deal with printing of new field types.
        * einfo.ads, gen_il-fields.ads (Renaming_Map): Remove.
        * gcc-interface/decl.c (gnat_to_gnu_entity): Use Known_Alignment
        before calling Alignment. This preserve some probably buggy
        behavior: if the alignment is not set, it previously defaulted
        to Uint_0; we now make that explicit.  Use Copy_Alignment,
        because "Set_Alignment (Y, Alignment (X));" no longer works when
        the Alignment of X has not yet been set.
        * gcc-interface/trans.c (process_freeze_entity): Use
        Copy_Alignment.

2021-07-12  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-dwalin.ads: Adjust a few comments left and right.
        (Line_Info_Register): Comment out unused components.
        (Line_Info_Header): Add DWARF 5 support.
        (Dwarf_Context): Likewise.  Rename "prologue" into "header".
        * libgnat/s-dwalin.adb: Alphabetize "with" clauses.
        (DWARF constants): Add DWARF 5 support and reorder.
        (For_Each_Row): Adjust.
        (Initialize_Pass): Likewise.
        (Initialize_State_Machine): Likewise and fix typo.
        (Open): Add DWARF 5 support.
        (Parse_Prologue): Rename into...
        (Parse_Header): ...this and add DWARF 5 support.
        (Read_And_Execute_Isn): Rename into...
        (Read_And_Execute_Insn): ...this and adjust.
        (To_File_Name): Change parameter name and add DWARF 5 support.
        (Read_Entry_Format_Array): New procedure.
        (Skip_Form): Add DWARF 5 support and reorder.
        (Seek_Abbrev): Do not count entries and add DWARF 5 support.
        (Debug_Info_Lookup): Add DWARF 5 support.
        (Symbolic_Address.Set_Result): Likewise.
        (Symbolic_Address): Adjust.

2021-07-12  Bob Duff  <duff@adacore.com>

        * sem_ch13.adb (Duplicate_Clause): Add a helper routine
        Check_One_Attr, with a parameter for the attribute_designator we
        are looking for, and one for the attribute_designator of the
        current node (which are usually the same). For Size and
        Value_Size, call it twice, once for each.
        * errout.ads: Fix a typo.

2021-07-12  Piotr Trojanek  <trojanek@adacore.com>

        * exp_imgv.adb (Expand_Image_Attribute): Move rewriting to
        attribute Put_Image to the beginning of expansion of attribute
        Image.

2021-07-09  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/utils.c (finish_subprog_decl): Remove obsolete line.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * exp_put_image.adb (Make_Put_Image_Name): Fix style.
        (Image_Should_Call_Put_Image): Likewise.
        (Build_Image_Call): Likewise.

2021-07-09  Ghjuvan Lacambre  <lacambre@adacore.com>

        * par-ch6.adb (Contains_Import_Aspect): New function.
        (P_Subprogram): Acknowledge `Import` aspects.

2021-07-09  Bob Duff  <duff@adacore.com>

        * exp_put_image.adb (Make_Component_Attributes): Use
        Implementation_Base_Type to get the parent type. Otherwise,
        Parent_Type_Decl is actually an internally generated subtype
        declaration, so we blow up on
        Type_Definition (Parent_Type_Decl).

2021-07-09  Dmitriy Anisimkov  <anisimko@adacore.com>

        * gsocket.h: Include net/if.h to get IF_NAMESIZE constant.
        * s-oscons-tmplt.c: Define IPV6_FLOWINFO for Linux.

2021-07-09  Steve Baird  <baird@adacore.com>

        * libgnat/a-cdlili.adb: Reimplement
        Ada.Containers.Doubly_Linked_Lists.Generic_Sorting.Sort using
        Mergesort instead of the previous Quicksort variant.

2021-07-09  Justin Squirek  <squirek@adacore.com>

        * exp_ch6.adb (Is_Build_In_Place_Function_Call): Add check to
        verify the Selector_Name of Exp_Node has been analyzed before
        obtaining its entity.

2021-07-09  Gary Dismukes  <dismukes@adacore.com>

        * libgnarl/s-osinte__vxworks.ads: Fix typo ("release" =>
        "releases") plus comment reformatting.
        * libgnat/s-os_lib.ads: In a comment, fix typo ("indended" =>
        "intended"), add a hyphen and semicolon, plus reformatting. In
        comment for subtype time_t, fix typo ("effect" => "affect"), add
        hyphens, plus reformatting.
        * libgnat/s-parame.ads, libgnat/s-parame__ae653.ads,
        libgnat/s-parame__hpux.ads: Remove period from one-line comment.

2021-07-09  Steve Baird  <baird@adacore.com>

        * exp_ch5.adb (Expand_General_Case_Statement): Add new function
        Else_Statements to handle the case of invalid data analogously
        to how it is handled when casing on a discrete value.
        * sem_case.adb (Has_Static_Discriminant_Constraint): A new
        Boolean-valued function.
        (Composite_Case_Ops.Scalar_Part_Count): Include discriminants
        when traversing components.
        (Composite_Case_Ops.Choice_Analysis.Traverse_Discrete_Parts):
        Include discriminants when traversing components; the component
        range for a constrained discriminant is a single value.
        (Composite_Case_Ops.Choice_Analysis.Parse_Choice): Eliminate
        Done variable and modify how Next_Part is computed so that it is
        always correct (as opposed to being incorrect when Done is
        True).  This includes changes in Update_Result (a local
        procedure).  Add new local procedure
        Update_Result_For_Box_Component and call it not just for box
        components but also for "missing" components (components
        associated with an inactive variant).
        (Check_Choices.Check_Composite_Case_Selector.Check_Component_Subtype):
        Instead of disallowing all discriminated component types, allow
        those that are unconstrained or statically constrained. Check
        discriminant subtypes along with other component subtypes.
        * doc/gnat_rm/implementation_defined_pragmas.rst: Update
        documentation to reflect current implementation status.
        * gnat_rm.texi: Regenerate.

2021-07-09  Justin Squirek  <squirek@adacore.com>

        * sem_ch6.adb (Check_Pragma_Inline): Correctly use
        Corresponding_Spec_Of_Stub when dealing subprogram body stubs.

2021-07-09  Doug Rupp  <rupp@adacore.com>

        * Makefile.rtl: Add translations for s-parame__posix2008.ads
        * libgnarl/s-linux.ads: Import System.Parameters.
        (time_t): Declare using System.Parameters.time_t_bits.
        * libgnarl/s-linux__alpha.ads: Likewise.
        * libgnarl/s-linux__android.ads: Likewise.
        * libgnarl/s-linux__hppa.ads: Likewise.
        * libgnarl/s-linux__mips.ads: Likewise.
        * libgnarl/s-linux__riscv.ads: Likewise.
        * libgnarl/s-linux__sparc.ads: Likewise.
        * libgnarl/s-linux__x32.ads: Likewise.
        * libgnarl/s-qnx.ads: Likewise.
        * libgnarl/s-osinte__aix.ads: Likewise.
        * libgnarl/s-osinte__android.ads: Likewise.
        * libgnarl/s-osinte__darwin.ads: Likewise.
        * libgnarl/s-osinte__dragonfly.ads: Likewise.
        * libgnarl/s-osinte__freebsd.ads: Likewise.
        * libgnarl/s-osinte__gnu.ads: Likewise.
        * libgnarl/s-osinte__hpux-dce.ads: Likewise.
        * libgnarl/s-osinte__hpux.ads: Likewise.
        * libgnarl/s-osinte__kfreebsd-gnu.ads: Likewise.
        * libgnarl/s-osinte__lynxos178e.ads: Likewise.
        * libgnarl/s-osinte__qnx.ads: Likewise.
        * libgnarl/s-osinte__rtems.ads: Likewise.
        * libgnarl/s-osinte__solaris.ads: Likewise.
        * libgnarl/s-osinte__vxworks.ads: Likewise.
        * libgnat/g-sothco.ads: Likewise.
        * libgnat/s-osprim__darwin.adb: Likewise.
        * libgnat/s-osprim__posix.adb: Likewise.
        * libgnat/s-osprim__posix2008.adb: Likewise.
        * libgnat/s-osprim__rtems.adb: Likewise.
        * libgnat/s-osprim__x32.adb: Likewise.
        * libgnarl/s-osinte__linux.ads: use type System.Linux.time_t.
        * libgnat/s-os_lib.ads (time_t): Declare as subtype of
        Long_Long_Integer.
        * libgnat/s-parame.ads (time_t_bits): New constant.
        * libgnat/s-parame__ae653.ads (time_t_bits): Likewise.
        * libgnat/s-parame__hpux.ads (time_t_bits): Likewise.
        * libgnat/s-parame__vxworks.ads (time_t_bits): Likewise.
        * libgnat/s-parame__posix2008.ads: New file for 64 bit time_t.

2021-07-09  Bob Duff  <duff@adacore.com>

        * comperr.adb (Compiler_Abort): Print source file name.

2021-07-09  Joffrey Huguet  <huguet@adacore.com>

        * libgnat/a-strunb.ads, libgnat/a-strunb__shared.ads: Fix layout
        in contracts.

2021-07-09  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo.ads (JSON output format): Document adjusted key name.
        * repinfo.adb (List_Record_Layout): Use Original_Record_Component
        if the normalized position of the component is not known.
        (List_Structural_Record_Layout): Rename Outer_Ent parameter into
        Ext_End and add Ext_Level parameter. In an extension, if the parent
        subtype has static discriminants, call List_Record_Layout on it.
        Output "parent_" prefixes before "variant" according to Ext_Level.
        Adjust recursive calls throughout the procedure.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * exp_util.ads (Map_Types): Fix typo.

2021-07-09  Fedor Rybin  <frybin@adacore.com>

        * krunch.adb: Add safeguards against index range violations.

2021-07-09  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/a-strfix.adb: Take advantage of extended returns.

2021-07-09  Eric Botcazou  <ebotcazou@adacore.com>

        * doc/gnat_rm/implementation_defined_attributes.rst
        (Scalar_Storage_Order): Add paragraph about representation
        changes.
        * gnat_rm.texi: Regenerate.

2021-07-09  Frederic Konrad  <konrad@adacore.com>

        * Makefile.rtl (LIBGNAT_TARGET_PAIRS) <aarch64*-*-rtems*>: Use
        the wraplf variant of Aux_Long_Long_Float.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch6.adb (Analyze_Expression_Function): Initialize Orig_N
        and Typ variables.

2021-07-09  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch13.adb (Resolve_Aspect_Expressions): Use the same
        processing for Predicate, Static_Predicate and
        Dynamic_Predicate. Do not build the predicate function spec.
        Update comments.
        (Resolve_Name): Only reset Entity when necessary to avoid
        spurious visibility errors.
        (Check_Aspect_At_End_Of_Declarations): Handle consistently all
        Predicate aspects.
        * sem_ch3.adb (Analyze_Subtype_Declaration): Fix handling of
        private types with predicates.

2021-07-09  Justin Squirek  <squirek@adacore.com>

        * sem_util.ads (Type_Access_Level): Add new optional parameter
        Assoc_Ent.
        * sem_util.adb (Accessibility_Level): Treat access discriminants
        the same as components when the restriction
        No_Dynamic_Accessibility_Checks is enabled.
        (Deepest_Type_Access_Level): Remove exception for
        Debug_Flag_Underscore_B when returning the result of
        Type_Access_Level in the case where
        No_Dynamic_Accessibility_Checks is active.
        (Function_Call_Or_Allocator_Level): Correctly calculate the
        level of Expr based on its containing subprogram instead of
        using Current_Subprogram.
        * sem_res.adb (Valid_Conversion): Add actual for new parameter
        Assoc_Ent in call to Type_Access_Level, and add test of
        No_Dynamic_Accessibility_Checks_Enabled to ensure that static
        accessibility checks are performed for all anonymous access type
        conversions.

2021-07-09  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_dbug.ads: Update documentation of various items.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch6.adb (Analyze_Expression_Function): Reorder code.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch6.adb (Analyze_Expression_Function): Reorder code.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch6.adb (Analyze_Expression_Function): Add variable to
        avoid repeated calls to Etype.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch6.adb (Analyze_Expression_Function): Fix comment.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch6.adb (Analyze_Expression_Function): Use Orig_N variable
        instead of repeated calls to Original_Node.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch6.adb (Analyze_Expression_Function): Change types local
        variables from Entity_Id to Node_Id.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch6.adb (Analyze_Expression_Function): A local Expr
        constant was shadowing a global constant with the same name and
        the same value.

2021-07-09  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Preanalyze_And_Resolve): Only call
        Set_Must_Not_Freeze when it is necessary to restore the previous
        value.

2021-07-08  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch5.adb (Analyze_Assignment): Clear Current_Assignment at
        exit.
        (Analyze_Target_Name): Prevent AST climbing from going too far.

2021-07-08  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch5.adb (Analyze_Target_Name): Properly reject a
        Target_Name when it appears outside of an assignment statement,
        or within the left-hand side of one.

2021-07-08  Bob Duff  <duff@adacore.com>

        * einfo-utils.ads, einfo-utils.adb (Unknown_Alignment,
        Unknown_Component_Bit_Offset, Unknown_Component_Size,
        Unknown_Esize, Unknown_Normalized_First_Bit,
        Unknown_Normalized_Position, Unknown_Normalized_Position_Max,
        Unknown_RM_Size): Remove these functions.
        * exp_pakd.adb, exp_util.adb, fe.h, freeze.adb, layout.adb,
        repinfo.adb, sem_ch13.adb, sem_ch3.adb, sem_util.adb: Remove
        calls to these functions; do "not Known_..." instead.
        * gcc-interface/decl.c, gcc-interface/trans.c
        (Unknown_Alignment, Unknown_Component_Size, Unknown_Esize,
        Unknown_RM_Size): Remove calls to these functions; do
        "!Known_..." instead.

2021-07-08  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_dbug.adb (Get_Encoded_Name): Do not encode names of discrete
        types with custom bounds, except with -fgnat-encodings=all.
        * exp_pakd.adb (Create_Packed_Array_Impl_Type): Adjust comment.

2021-07-08  Bob Duff  <duff@adacore.com>

        * comperr.adb (Compiler_Abort): Call Sinput.Unlock, because if
        this is called late, then Source_Dump would crash otherwise.
        * debug.adb: Correct documentation of the -gnatd.9 switch.
        * exp_ch4.adb (Expand_Allocator_Expression): Add a comment.
        * exp_ch6.adb: Minor comment fixes.  Add assertion.
        * exp_ch6.ads (Is_Build_In_Place_Result_Type): Correct comment.
        * exp_ch7.adb, checks.ads: Minor comment fixes.

2021-07-08  Doug Rupp  <rupp@adacore.com>

        * sigtramp-vxworks-target.inc: Rename to...
        * sigtramp-vxworks-target.h: ... this.
        * sigtramp-vxworks.c, Makefile.rtl: Likewise.

2021-07-08  Ghjuvan Lacambre  <lacambre@adacore.com>

        * lib-writ.ads: Mention SCOs dependency as reason for duplicates.
        * lib.ads (Units): Update documentation to mention duplicated
        units.

2021-07-08  Ed Schonberg  <schonberg@adacore.com>

        * style.adb (Missing_Overriding): Do not emit message when
        parent of subprogram is a full type declaration.

2021-07-08  Arnaud Charlet  <charlet@adacore.com>

        * par-ch5.adb (P_Iterator_Specification): Add support for access
        definition in loop parameter.
        * sem_ch5.adb (Check_Subtype_Indication): Renamed...
        (Check_Subtype_Definition): ... into this and check for conformance
        on access definitions, and improve error messages.
        (Analyze_Iterator_Specification): Add support for access definition
        in loop parameter.

2021-07-08  Arnaud Charlet  <charlet@adacore.com>

        * sem_util.ads, sem_util.adb
        (Apply_Compile_Time_Constraint_Error): New parameter
        Emit_Message.
        * sem_ch4.adb (Analyze_Selected_Component): Disable warning
        within an instance.

2021-07-08  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_imgv.adb: Add with and use clause for Restrict and Rident.
        (Build_Enumeration_Image_Tables): Do not generate the hash function
        if the No_Implicit_Loops restriction is active.

2021-07-08  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch12.adb, sem_ch6.adb, sem_ch9.adb, sprint.adb: Simplify
        checks for non-empty lists.

2021-07-08  Piotr Trojanek  <trojanek@adacore.com>

        * par-ch10.adb (Unit_Display): Remove redundant condition; fix
        whitespace.

2021-07-08  Piotr Trojanek  <trojanek@adacore.com>

        * lib-load.adb (Load): Replace early return with goto to properly
        restore context on failure.

2021-07-08  Piotr Trojanek  <trojanek@adacore.com>

        * lib-writ.adb (Ensure_System_Dependency): Simplify condition.

2021-07-08  Piotr Trojanek  <trojanek@adacore.com>

        * lib-load.adb (Load_Unit): Fix style in comment.
        * par-load.adb (Load): Likewise.
        * scng.adb (Initialize_Scanner): Fix whitespace.

2021-07-08  Piotr Trojanek  <trojanek@adacore.com>

        * par-load.adb (Load): Don't remove unit, but flag it as
        erroneous and return.

2021-07-08  Ghjuvan Lacambre  <lacambre@adacore.com>

        * exp_prag.adb (Expand_Pragma_Inspection_Point): Fix error
        message.

2021-07-08  Yannick Moy  <moy@adacore.com>

        * layout.adb (Layout_Type): Do not call Number_Dimensions if the
        type does not have First_Index set.

2021-07-08  Ghjuvan Lacambre  <lacambre@adacore.com>

        * exp_prag.adb (Expand_Pragma_Inspection_Point): After expansion
        of the Inspection_Point pragma, check if referenced entities
        that have a freeze node are already frozen. If they aren't, emit
        a warning and turn the pragma into a no-op.

2021-07-08  Yannick Moy  <moy@adacore.com>

        * layout.adb (Layout_Type): Add guard before calling Expr_Value.

2021-07-08  Yannick Moy  <moy@adacore.com>

        * layout.adb (Layout_Type): Special case when RM_Size and Esize
        can be computed for packed arrays.

2021-07-08  Steve Baird  <baird@adacore.com>

        * rtsfind.ads, rtsfind.adb: Add support for finding the packages
        System.Atomic_Operations and
        System.Atomic_Operations.Test_And_Set and the declarations
        within that latter package of the type Test_And_Set_Flag and the
        function Atomic_Test_And_Set.
        * exp_ch11.adb (Expand_N_Exception_Declaration): If an exception
        is declared other than at library level, then we need to call
        Register_Exception the first time (and only the first time) the
        declaration is elaborated.  In order to decide whether to
        perform this call for a given elaboration of the declaration, we
        used to unconditionally use a (library-level) Boolean variable.
        Now we instead use a variable of type
        System.Atomic_Operations.Test_And_Set.Test_And_Set_Flag unless
        either that type is unavailable or a No_Tasking restriction is
        in effect (in which case we use a Boolean variable as before).

2021-07-08  Arnaud Charlet  <charlet@adacore.com>

        * gcc-interface/system.ads: Add No_Tasking restriction.

2021-07-08  Ed Schonberg  <schonberg@adacore.com>

        * libgnat/a-cohama.ads: Introduce an equality operator over
        cursors.
        * libgnat/a-cohase.ads: Ditto.
        * libgnat/a-cohama.adb: Add body for "=" over cursors.
        (Insert): Do not set the Position component of the cursor that
        denotes the inserted element.
        * libgnat/a-cohase.adb: Ditto.

2021-07-08  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/a-cbdlli.adb, libgnat/a-cbhama.adb,
        libgnat/a-cbhase.adb, libgnat/a-cbmutr.adb,
        libgnat/a-cborma.adb, libgnat/a-cborse.adb,
        libgnat/a-cobove.adb, libgnat/a-textio.adb,
        libgnat/a-witeio.adb, libgnat/a-ztexio.adb: Make code compatible
        with No_Dynamic_Accessibility_Checks restriction.

2021-07-08  Arnaud Charlet  <charlet@adacore.com>

        * debug.adb, sem_util.adb: Revert meaning of -gnatd_b.
        * sem_res.adb: Minor reformatting.

2021-07-08  Arnaud Charlet  <charlet@adacore.com>

        * make.adb, osint.adb: Make code compatible with
        No_Dynamic_Accessibility_Checks restriction.

2021-07-08  Piotr Trojanek  <trojanek@adacore.com>

        * lib-writ.adb (Ensure_System_Dependency): Replace search in
        Lib.Units with a search in Lib.Unit_Names.

2021-07-08  Piotr Trojanek  <trojanek@adacore.com>

        * sinput-l.adb (Load_File): Simplify foreword manipulation with
        concatenation; similar for filename with preprocessed output.

2021-07-07  Dmitriy Anisimkov  <anisimko@adacore.com>

        * s-oscons-tmplt.c (MSG_WAITALL): Remove wrong #ifdef
        __MINWGW32__.

2021-07-07  Gary Dismukes  <dismukes@adacore.com>

        * einfo-utils.adb (Primitive_Operations): Default to returning
        Direct_Primitive_Operations in the case of concurrent types
        (when Corresponding_Record_Type not present).
        * sem_ch9.adb (Analyze_Protected_Type_Declaration): Initialize
        Direct_Primitive_Operations to an empty element list.
        (Analyze_Task_Type_Declaration): Initialize
        Direct_Primitive_Operations to an empty element list.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * sem_eval.adb (Set_Checking_Potentially_Static_Expression):
        Stronger assertion.

2021-07-07  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch12.adb (Analyze_Subprogram_Instantiation): Mark Anon_Id
        intrinsic before calling Analyze_Instance_And_Renamings because
        this flag may be propagated to other nodes.

2021-07-07  Dmitriy Anisimkov  <anisimko@adacore.com>

        * s-oscons-tmplt.c (TCP_KEEPCNT TCP_KEEPIDLE, TCP_KEEPINTVL):
        Hardcode on Windows if undefined.

2021-07-07  Bob Duff  <duff@adacore.com>

        * checks.adb (Install_Primitive_Elaboration_Check): Do not
        generate elaboration checks for primitives if pragma Pure or
        Preelaborate is present.  Misc comment fixes, including
        referring to the correct kind of check (elaboration, not
        accessibility).
        * checks.ads, restrict.adb, sem_cat.ads, sinfo.ads: Minor
        reformatting and comment fixes.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Analyze_Pragma): Simplify processing of pragma
        CPP_Constructor.

2021-07-07  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/g-debpoo.adb (Code_Address_For_Allocate_End): Default
        Initialize.

2021-07-07  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/s-atocou.ads, libgnat/s-atocou__builtin.adb: Code
        cleanups.

2021-07-07  Gary Dismukes  <dismukes@adacore.com>

        * freeze.adb (Check_Inherited_Conditions): Setting of Ekind,
        LSP_Subprogram, and Is_Wrapper needs to happen for null
        procedures as well as other wrapper cases, so the code is moved
        from the else part in front of the if statement.  (Fixes a
        latent bug encountered while working on this set of changes.)
        * sem_attr.adb (Resolve_Attribute): Report an error for the case
        of an Access attribute applied to a primitive of an abstract
        type when the primitive has any nonstatic Pre'Class or
        Post'Class expressions.
        * sem_ch8.adb (Analyze_Subprogram_Renaming): Report an error for
        the case of a actual subprogram associated with a nonabstract
        formal subprogram when the actual is a primitive of an abstract
        type and the primitive has any nonstatic Pre'Class or Post'Class
        expressions.
        * sem_disp.adb (Check_Dispatching_Context): Remove special
        testing for null procedures, and replace it with a relaxed test
        that avoids getting an error about illegal calls to abstract
        subprograms in cases where RM 6.1.1(7/5) applies in
        Pre/Post'Class aspects. Also, remove special test for
        Postcondition, which seems to be unnecessary, update associated
        comments, and fix a typo in one comment.
        (Check_Dispatching_Call): Remove an unneeded return statement,
        and report an error for the case of a nondispatching call to a
        nonabstract subprogram of an abstract type where the subprogram
        has nonstatic Pre/Post'Class aspects.
        * sem_util.ads
        (Is_Prim_Of_Abst_Type_With_Nonstatic_CW_Pre_Post): New function.
        (In_Pre_Post_Condition): Add a flag formal Class_Wide_Only,
        defaulted to False, for indicating whether the function should
        only test for the node being within class-wide pre- and
        postconditions.
        * sem_util.adb
        (Is_Prim_Of_Abst_Type_With_Nonstatic_CW_Pre_Post): New function
        to determine whether a subprogram is a primitive of an abstract
        type where the primitive has class-wide Pre/Post'Class aspects
        specified with nonstatic expressions.
        (In_Pre_Post_Condition): Extend testing to account for the new
        formal Class_Wide_Only.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch12.adb (Check_Shared_Variable_Control_Aspects): Errors
        emitted via Check_Volatility_Compatibility are now emitted at
        Actual, just like other errors emitted by
        Check_Shared_Variable_Control_Aspects.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * uname.adb (Get_Unit_Name): Simplify with a bounded string
        buffer; also, this addresses a ??? comment about the max length
        being exceeded.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * uname.adb (Get_Body_Name, Get_Parent_Body_Name,
        Get_Parent_Spec_Name, Get_Spec_Name, Is_Child_Name,
        Is_Body_Name, Is_Spec_Name, Name_To_Unit_Name): Use a local
        instead of the global buffer.

2021-07-07  Bob Duff  <duff@adacore.com>

        * sem_ch13.adb (Analyze_Attribute_Definition_Clause): Combine
        processing of Size and Value_Size clauses. Ensure that
        Value_Size is treated the same as Size, in the cases where both
        are allowed (i.e. the prefix denotes a first subtype).  Misc
        cleanup.
        * einfo-utils.adb (Init_Size): Add assertions.
        (Size_Clause): Return a Value_Size clause if present, instead of
        just looking for a Size clause.
        * einfo.ads (Has_Size_Clause, Size_Clause): Change documentation
        to include Value_Size.
        * sem_ch13.ads, layout.ads, layout.adb: Comment modifications.

2021-07-07  Steve Baird  <baird@adacore.com>

        * exp_dist.adb (Add_RACW_Primitive_Declarations_And_Bodies): Add
        TSS_Put_Image to list of predefined primitives that need special
        treatment.
        (Build_General_Calling_Stubs, Build_Subprogram_Receiving_Stubs):
        Remove previous hack for dealing with TSS_Put_Image procedures.

2021-07-07  Dmitriy Anisimkov  <anisimko@adacore.com>

        * libgnat/g-socket.adb (Get_Socket_Option): Add 500ms only when
        Minus_500ms_Windows_Timeout is True.
        (Set_Socket_Option): Use "* 1000" instead of "/ 0.001" to
        convert to milliseconds.

2021-07-07  Bob Duff  <duff@adacore.com>

        * tbuild.adb (Unchecked_Convert_To): Set the Parent of the new
        node to the Parent of the old node.
        * tbuild.ads (Unchecked_Convert_To): Document differences
        between Convert_To and Unchecked_Convert_To. The previous
        documentation claimed they are identical except for the
        uncheckedness of the conversion.

2021-07-07  Yannick Moy  <moy@adacore.com>

        * checks.adb (Apply_Scalar_Range_Check): Remove special case for
        GNATprove mode.
        * sem_res.adb (Resolve_Arithmetic_Op): Same.
        * sem_util.adb (Apply_Compile_Time_Constraint_Error): Same.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch6.adb (Check_For_Primitive_Subprogram): Move
        declarations of local variables after nested subprogram bodies.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * exp_disp.adb (CPP_Num_Prims): Reuse List_Length.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb, exp_ch6.adb, sem_ch6.adb: Replace Ekind
        membership test in Private_Kind with a call to Is_Private_Type.

2021-07-07  Bob Duff  <duff@adacore.com>

        * gen_il-gen-gen_entities.adb: Remove Linker_Section_Pragma
        field from Record_Field_Kind.  Minor comment improvement.

2021-07-07  Yannick Moy  <moy@adacore.com>

        * libgnat/a-ngelfu.ads (Cot): Fix precondition.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * par.adb (Par): A local Name variable is now a renaming of a
        constant slice.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * gnat1drv.adb (Gnat1drv): Remove flagging of main unit and its
        corresponding spec as requiring code generation; now the flags
        are set much earlier.
        * lib-load.adb (Load_Main_Source): Set Generate_Code flag on the
        main unit source.
        (Make_Instance_Unit): Copy Generate_Code flag from the main unit
        to instance units.
        * lib-writ.adb (Write_ALI): Remove redundant condition;
        Generate_Code flag is always set for the main unit.
        * par-load.adb (Load): Set Generate_Code flag on the main unit's
        corresponding spec, if any.

2021-07-07  Dmitriy Anisimkov  <anisimko@adacore.com>

        * libgnat/g-socket.ads (Option_Name): Add Keep_Alive_Count,
        Keep_Alive_Idle, and Keep_Alive_Interval items to enumeration.
        (Option_Type): Add Keep_Alive_Count, Keep_Alive_Idle, and
        Keep_Alive_Interval alternatives to the case of discriminated
        record.
        * libgnat/g-socket.adb (Options): Add Keep_Alive_Count,
        Keep_Alive_Idle, and Keep_Alive_Interval to items enumerator to
        OS constant converter.
        (Set_Socket_Option): Process Keep_Alive_Count, Keep_Alive_Idle,
        and Keep_Alive_Interval socket options.
        (Get_Socket_Option): Idem.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * lib-writ.adb (Write_ALI): Exit from loop after seeing first
        unit that violates No_Elaboration_Code restriction.

2021-07-07  Piotr Trojanek  <trojanek@adacore.com>

        * inline.adb (Instantiate_Bodies): Fix white in declaration.
        (Remove_Dead_Instance): Change iteration from WHILE to FOR.

2021-07-07  Bob Duff  <duff@adacore.com>

        * checks.adb, exp_attr.adb, exp_ch4.adb, exp_ch6.adb,
        exp_ch9.adb, exp_disp.adb, exp_util.adb, inline.adb,
        sem_res.adb: Change all calls to Make_Unchecked_Type_Conversion
        to call Unchecked_Convert_To instead. This involves removing
        New_Occurrence_Of on the first parameter, because
        Unchecked_Convert_To expects a type entity, rather than the name
        of one. Also, removed calls to Relocate_Node, because
        Unchecked_Convert_To takes care of that.
        * sinfo.ads: Change comment to be worded more firmly.

2021-07-07  Steve Baird  <baird@adacore.com>

        * libgnarl/s-tassta.adb (Free_Task): Acquire the Task_Lock
        before, rather than after, querying the task's Terminated flag.
        Add a corresponding Task_Unlock call.

2021-07-06  Bob Duff  <duff@adacore.com>

        * atree.ads (Current_Error_Node): Initialize to Empty.

2021-07-06  Steve Baird  <baird@adacore.com>

        * exp_put_image.adb: Eliminate references to
        Debug_Flag_Underscore_Z.  Change the meaning of the function
        Enable_Put_Image. Previously, a result of False for a tagged
        type would mean that the type does not get a Put_Image (PI)
        routine at all. Now, it means that the type gets a PI routine
        with very abbreviated functionality (just a call to
        Unknown_Put_Image). This resolves problems in mixing code
        compiled with and without the -gnat2022 switch.
        * exp_ch3.adb: Enable_Put_Image no longer participates in
        determining whether a tagged type gets a Put_Image procedure.  A
        tagged type does not get a Put_Image procedure if the type
        Root_Buffer_Type is unavailable. This is needed to support cross
        targets where tagged types are supported but the type
        Root_Buffer_Type is not available.
        * exp_dist.adb: Add workarounds for some problems that arise
        when using the (obsolete?) Garlic implementation of the
        distributed systems annex with Ada 2022 constructs.
        * libgnat/a-sttebu.ads: Workaround a bootstrapping problem.
        Older compilers do not support raise expressions, so revise the
        the Pre'Class condition to meet this requirement without
        changing the condition's behavior at run time.

2021-07-06  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo-input.adb (JSON_Entity_Kind, Read_Variant_Part): Fix
        typo in comment.

2021-07-06  Steve Baird  <baird@adacore.com>

        * sem_ch5.adb (Analyze_Assignment): Add new nested function,
        Omit_Range_Check_For_Streaming, and make call to
        Apply_Scalar_Range_Check conditional on the result of this new
        function.
        * exp_attr.adb (Compile_Stream_Body_In_Scope): Eliminate Check
        parameter, update callers.  The new
        Omit_Range_Check_For_Streaming parameter takes the place of the
        old use of calling Insert_Action with Suppress => All_Checks,
        which was insufficiently precise (it did not allow suppressing
        checks for one component but not for another).
        (Expand_N_Attribute_Reference): Eliminate another "Suppress =>
        All_Checks" from an Insert_Action call, this one in generating
        the expansion of a T'Read attribute reference for a composite
        type T.

2021-07-06  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_ch5.adb (Analyze_Loop_Parameter_Specification): Check for
        empty loops caused by constraints.

2021-07-06  Nicolas Roche  <roche@adacore.com>

        * rtinit.c (skip_quoted_string): Handle malformed command line
        with no closing double quote.
        (skip_argument): Handle case in which a null character is
        encountered by skip_quote_string.

2021-07-06  Piotr Trojanek  <trojanek@adacore.com>

        * uname.adb (Add_Node_Name): Replace local constant whose
        initial expression was evaluated even when unnecessary with just
        that expression that is evaluated at most once and only when
        needed.

2021-07-06  Piotr Trojanek  <trojanek@adacore.com>

        * lib.adb (Remove_Unit): Replace defensive code with an
        assertion.
        * par-load.adb (Load): Address a question mark in the comment.

2021-07-06  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Enclosing_Comp_Unit_Node): When the loop exits
        the Current_Node is either an N_Compilation_Unit node or Empty,
        so simply return it without redundant checks.

2021-07-06  Piotr Trojanek  <trojanek@adacore.com>

        * lib-load.adb (Load_Unit): Remove excessive whitespace.
        * lib.adb (Is_Internal_Unit, Is_Predefined_Unit): Likewise.
        * par-ch10.adb (P_Compilation_Unit): Simplify with membership
        test.
        * par-load.adb (Load): Likewise.
        * uname.adb (Get_Unit_Name): Likewise.

2021-07-06  Piotr Trojanek  <trojanek@adacore.com>

        * lib-writ.adb (Ensure_System_Dependency): Simplify by reusing a
        constant name.

2021-07-06  Steve Baird  <baird@adacore.com>

        * exp_ch5.adb
        (Expand_N_Case_Statement.Expand_General_Case_Statement.Pattern_Match):
        When generating an equality test for a statically known discrete
        value, only generate the numeric value if the discrete type is
        not an enumeration type.  If it is an enumeration type, then
        call Get_Enum_Lit_From_Pos instead.

2021-07-06  Justin Squirek  <squirek@adacore.com>

        * par-ch6.adb (Get_Return_Kind): Removed.
        (Is_Extended): Created to identify simple and "when" return
        statements from extended return statements.
        (P_Return_Statement): Merged simple and "when" return statement
        processing.

2021-07-06  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch4.adb (Try_One_Prefix_Interpretation): Augment test of
        "not Extensions_Allowed" with test for absence of Obj_Type's
        primitive operations Elist, as an additional condition for early
        return from this procedure.

2021-07-06  Gary Dismukes  <dismukes@adacore.com>

        * exp_ch4.adb (Process_Transient_In_Expression): In one comment,
        fix two typos and reorder wording of one sentence, plus minor
        reformatting.

2021-07-06  Justin Squirek  <squirek@adacore.com>

        * exp_ch5.adb (Expand_Formal_Container_Element_Loop): Remove
        legacy expansion of element iterators, and use expansion form
        used by unconstrained element types in the general case.

2021-07-06  Ed Schonberg  <schonberg@adacore.com>

        * exp_ch4.adb (Process_Transient_In_Expression): Ensure that
        Fin_Context, used to insert finalization code for the
        expression, is a list member: the value returned by
        Find_Hook_Context may be an expression node when the transient
        is part of a larger expression and it has a non-boolean type.

2021-07-06  Yannick Moy  <moy@adacore.com>

        * sem_case.adb: Fix error message.

2021-07-06  Bob Duff  <duff@adacore.com>

        * tbuild.adb (Convert_To): Add assert, along with a comment.
        (Make_DT_Access): Remove this function, which is not used.  It
        was incorrect anyway (the call to New_Occurrence_Of should not
        be there).
        (Unchecked_Convert_To): Add assert.  The previous version's test
        for unchecked conversion to the same type was redundant and
        could never be true, because the previous 'if' already checked
        for ANY expression of the same type. Remove that, and replace
        with a test for unchecked conversion to a related type.
        Otherwise, we somethings get things like
        "finalize(some_type!(some_type!(x)))" in the generated code,
        where x is already of type some_type, but we're converting it to
        the private type and then to the full type or vice versa (so the
        types aren't equal, so the previous 'if' doesn't catch it).
        Avoid updating the Parent. This is not necessary; the Parent
        will be updated if/when the node is attached to the tree.
        * tbuild.ads: Fix comments. No need to say "this is safe" when
        we just explained that a few lines earlier.  Remove
        Make_DT_Access.
        * sinfo.ads: Add comments.
        * exp_ch7.adb (Make_Finalize_Address_Stmts): Minor comment fix.
        * gen_il-gen.adb, gen_il-gen.ads, gen_il-gen-gen_nodes.adb,
        gen_il-internals.ads: Implement a feature where you can put:
        Nmake_Assert => "expr" where expr is a boolean expression in a
        call to Create_Concrete_Node_Type. It is added in a pragma
        Assert in the Nmake.Make_... function for that type.

2021-07-06  Gary Dismukes  <dismukes@adacore.com>

        * checks.adb: Remove calls of Set_Do_Tag_Check (N, False).
        * einfo.ads: Remove hanging unneeded ??? comment ("this real description
        was clobbered").
        * exp_util.ads (Insert_Actions_After): Remove ??? from spec comment.
        * gen_il-fields.ads (Opt_Field_Enum): Remove literals
        Do_Accessibility_Check and Do_Tag_Check.
        * gen_il-gen-gen_nodes.adb: Remove all calls to Sm for
        Do_Accessibility_Check and Do_Tag_Check.
        * sem_type.ads (Is_Subtype_Of): Remove obsolete ???
        comment (function is not limited to scalar subtypes).
        * sem_util.ads (Is_Local_Variable_Reference): Revise comment to
        mention out-mode parameters as well, and remove ???.
        (Propagate_Concurrent_Flags): Minor reformatting.
        (Propagate_Invariant_Attributes): Typo fix.
        (Propagate_Predicate_Attributes): Indicate what is propagated
        and remove ??? comment.
        * sem_util.adb (Cannot_Raise_Constraint_Error): Remove unneeded
        test of Do_Tag_Check.
        (Is_Local_Variable_Reference): Extend function to testing for
        formals of mode out as well.
        * sinfo.ads: Remove ??? comment about flag
        Convert_To_Return_False indicating that the flag is obsolete (in
        fact it's used). Remove references to Do_Accessibility_Check and
        Do_Tag_Check (and the two associated ??? comments), as these
        flags are unneeded.
        * sinfo-cn.adb (Change_Conversion_To_Unchecked): Remove call of
        Set_Do_Tag_Check (N, False).
        * targparm.ads (Support_Atomic_Primitives_On_Target): Remove ???
        comment, plus minor reformatting.

2021-07-06  Justin Squirek  <squirek@adacore.com>

        * par-ch6.adb (Get_Return_Kind): Properly handle the case of a
        "return when" statement in the procedure case.

2021-07-06  Bob Duff  <duff@adacore.com>

        * sem.ads (Node_To_Be_Wrapped): Minor comment fix.
        * exp_ch7.adb (Establish_Transient_Scope): Misc cleanups and
        comment improvements.
        (Set_Node_To_Be_Wrapped): Remove -- not worth putting this code
        in a separate procedure, called only once.
        * sem_util.adb (Requires_Transient_Scope): Assert that our
        parameter has the right Kind. It probably shouldn't be E_Void,
        but that is passed in in some cases.
        (Ensure_Minimum_Decoration): Move the call later, so we know Typ
        is Present, and remove "if Present (Typ)" from this procedure.
        * exp_aggr.adb (Convert_To_Assignments): Use membership test,
        and avoid the "if False" idiom.
        (Expand_Array_Aggregate): Remove a ??? comment.
        * sem_ch8.adb (Push_Scope): Take advantage of the full coverage
        rules for aggregates.
        * sem_res.adb (Resolve_Declare_Expression): Remove test for
        Is_Type -- that's all it can be.  Use named notation in call to
        Establish_Transient_Scope.
        * libgnat/a-cdlili.adb (Adjust): Remove redundant code.
        (Clear): Remove "pragma Warnings (Off);", which wasn't actually
        suppressing any warnings.

2021-07-06  Bob Duff  <duff@adacore.com>

        * gen_il-gen-gen_nodes.adb: Change the parent of
        N_Exception_Declaration to be N_Declaration.  Minor comment fix.

2021-07-06  Ed Schonberg  <schonberg@adacore.com>

        * exp_ch4.adb (Expand_N_Type_Conversion): If the conversion is
        the name of an assignment operation do not apply predicate check
        to it prior to the assignment.

2021-07-06  Bob Duff  <duff@adacore.com>

        * libgnat/a-conhel.adb: Assert that tampering counts remain
        between 0 and 2**31-1.  This makes debugging of
        finalization-related bugs easier.

2021-07-06  Doug Rupp  <rupp@adacore.com>

        * Makefile.rtl (LIBGNAT_TARGET_PAIRS): Use s-osprim__posix.adb
        vice s-osprim__vxworks.adb for all vxworks7r2 targets.

2021-07-06  Richard Kenner  <kenner@adacore.com>

        * gen_il-types.ads (Void_Or_Type_Kind,
        Exception_Or_Object_Kind): Declare.
        * gen_il-gen-gen_entities.adb: Likewise.

2021-07-06  Gary Dismukes  <dismukes@adacore.com>

        * doc/gnat_rm/implementation_defined_pragmas.rst: Add a
        description of the feature of prefixed-view calls for untagged
        types to the section on pragma Extensions_Allowed.
        * gnat_rm.texi: Regenerate.
        * einfo.ads: Update specification for
        Direct_Primitive_Operations to reflect its use for untagged
        types when Extensions_Allowed is True.
        * gen_il-gen-gen_entities.adb: Allow Direct_Primitive_Operations
        as a field of untagged classes of types by removing the "Pre"
        test of "Is_Tagged_Type (N)", and making that field generally
        available for all types and subtypes by defining it for
        Type_Kind and removing its specification for individual classes
        of types.
        * sem_ch3.adb (Analyze_Full_Type_Declaration): Initialize the
        Direct_Primitive_Operations list when not already set for the
        new (sub)type and its base type (except when Ekind of the type
        is E_Void, which can happen due to errors in cases where
        Derived_Type_Declaration is called and perhaps in other
        situations).
        (Analyze_Subtype_Declaration): Inherit
        Direct_Primitive_Operations list from the base type, for record
        and private cases.
        (Build_Derived_Record_Type): Initialize the
        Direct_Primitive_Operations list for derived record and private
        types.
        (Build_Derived_Type): Initialize the Direct_Primitive_Operations
        list for derived types (and also for their associated base types
        when needed).
        (Process_Full_View): For full types that are untagged record and
        private types, copy the primitive operations of the partial view
        to the primitives list of the full view.
        * sem_ch4.adb (Analyze_Selected_Component): Allow prefixed
        notation for subprogram calls in the case of untagged
        types (when Extensions_Allowed is True). In the case where
        Is_Private_Type (Prefix_Type) is True, call Try_Object_Operation
        when a discriminant selector wasn't found. Also call
        Try_Object_Operation in other type kind cases (when
        Extensions_Allowed is True).
        (Try_Object_Operation.Try_One_Prefixed_Interpretation): Prevent
        early return in the untagged case (when Extensions_Allowed is
        True). Condition main call to Try_Primitive_Operation on the
        type having primitives, and after that, if Prim_Result is False,
        test for case where the prefix type is a named access type with
        primitive operations and in that case call
        Try_Primitive_Operation after temporarily resetting Obj_Type to
        denote the access type (and restore it to the designated type
        after the call)
        (Try_Object_Operation.Valid_First_Argument_Of): Do matching type
        comparison by testing Base_Type (Obj_Type) against
        Base_Type (Typ), rather than against just Typ, to properly
        handle cases where the object prefix has a constrained
        subtype.  (Fixes a bug discovered while working on this
        feature.)
        * sem_ch6.adb
        (New_Overloaded_Entity.Check_For_Primitive_Subprogram): Add a
        primitive of an untagged type to the type's list of primitive
        operations, for both explicit and implicit (derived, so
        Comes_From_Source is False) subprogram declarations. In the case
        where the new primitive overrides an inherited subprogram,
        locate the primitives Elist that references the overridden
        subprogram, and replace that element of the list with the new
        subprogram (done by calling the new procedure
        Add_Or_Replace_Untagged_Primitive on the result type and each
        formal atype).
        (Check_For_Primitive_Subprogram.Add_Or_Replace_Untagged_Primitive):
        New nested procedure to either add or replace an untagged
        primitive subprogram in a given type's list of primitive
        operations (replacement happens in case where the new subprogram
        overrides a primitive of the type).
        * sem_ch7.adb (New_Private_Type): When Extensions_Allowed is
        True, initialize the Direct_Primitive_Operations list of a
        private type to New_Elmt_List in the case of untagged types.
        * sem_ch8.adb (Find_Selected_Component): In the case where the
        prefix is an entity name, relax condition that tests
        Has_Components so that Analyze_Selected_Component will also be
        called when Extensions_Allowed is True and the prefix type is
        any type.

2021-07-06  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch6.adb (Analyze_Subprogram_Body_Helper): Do not perform
        conformance check when the subprogram body has been created for
        an expression function that is not a completion of a previous
        specification, because the profile of the constructed body is
        copied from the expression function itself.

2021-07-06  Steve Baird  <baird@adacore.com>

        * doc/gnat_rm/implementation_of_specific_ada_features.rst: Add a
        warning indicating that the details of the default (i.e.,
        selected by the compiler) implementation of T'Put_Image for a
        nonscalar type T are subject to change.
        * gnat_rm.texi: Regenerate.

2021-07-05  Pierre-Marie de Rodat  <derodat@adacore.com>

        * gnat-style.texi, gnat_rm.texi, gnat_ugn.texi: Regenerate.

2021-07-05  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Analyze_Depends_In_Decl_Part): Reject overlays
        in Depends and Refined_Depends contracts.
        (Analyze_Global_In_Decl_Part): Likewise for Global and
        Refined_Global.
        (Analyze_Initializes_In_Decl_Part): Likewise for Initializes
        (when appearing both as a single item and as a initialization
        clause).
        * sem_util.ads (Ultimate_Overlaid_Entity): New routine.
        * sem_util.adb (Report_Unused_Body_States): Ignore overlays.
        (Ultimate_Overlaid_Entity): New routine.

2021-07-05  Claire Dross  <dross@adacore.com>

        * libgnat/a-cfdlli.ads, libgnat/a-cfdlli.adb
        libgnat/a-cfinve.ads, libgnat/a-cfinve.adb,
        libgnat/a-cofove.ads, libgnat/a-cofove.adb,
        libgnat/a-coboho.ads, libgnat/a-coboho.adb (Constant_Reference):
        Get a read-only access to an element of the container.
        (At_End): Ghost functions used to express pledges in the
        postcondition of Reference.
        (Reference): Get a read-write access to an element of the
        container.
        * libgnat/a-cfhama.ads, libgnat/a-cfhama.adb,
        libgnat/a-cforma.ads, libgnat/a-cforma.adb: The full view of the
        Map type is no longer a tagged type, but a wrapper over this
        tagged type. This is to avoid issues with dispatching result in
        At_End functions.
        (Constant_Reference): Get a read-only access to an element of
        the container.
        (At_End): Ghost functions used to express pledges in the
        postcondition of Reference.
        (Reference): Get a read-write access to an element of the
        container.
        * libgnat/a-cfhase.ads, libgnat/a-cfhase.adb,
        libgnat/a-cforse.ads, libgnat/a-cforse.adb: The full view of the
        Map type is no longer a tagged type, but a wrapper over this
        tagged type.
        (Constant_Reference): Get a read-only access to an element of
        the container.
        * libgnat/a-cofuse.ads, libgnat/a-cofuve.ads (Copy_Element):
        Expression function used to cause SPARK to make sure
        Element_Type is copiable.
        * libgnat/a-cofuma.ads (Copy_Key): Expression function used to
        cause SPARK to make sure Key_Type is copiable.
        (Copy_Element): Expression function used to cause SPARK to make
        sure Element_Type is copiable.

2021-07-05  Yannick Moy  <moy@adacore.com>

        * sem_prag.adb (Analyze_Global_Item): Adapt to update SPARK RM
        rule.

2021-07-05  Arnaud Charlet  <charlet@adacore.com>

        * Make-generated.in: Add -f switch to ensure cp will never fail.

2021-07-05  Steve Baird  <baird@adacore.com>

        * exp_ch3.adb (Build_Record_Init_Proc.Build_Assignment): When
        building the assignment statement corresponding to the default
        expression for a component, we make a copy of the expression.
        When making that copy (and if we have seen a component that
        requires late initialization), pass a Map parameter into the
        call to New_Copy_Tree to redirect references to the type to
        instead refer to the _Init formal parameter of the init proc.
        This includes hoisting the declaration of Has_Late_Init_Comp out
        one level so that it becomes available to Build_Assignment.
        (Find_Current_Instance): Return True for other kinds of current
        instance references, instead of just access-valued attribute
        references such as T'Access.
        * sem_util.adb (Is_Aliased_View): Return True for the _Init
        formal parameter of an init procedure. The changes in
        exp_ch3.adb can have the effect of replacing a "T'Access"
        attribute reference in an init procedure with an "_Init'Access"
        attribute reference. We want such an attribute reference to be
        legal. However, we do not simply mark the formal parameter as
        being aliased because that might impact callers.
        (Is_Object_Image): Return True if Is_Current_Instance returns
        True for the prefix of an Image (or related attribute) attribute
        reference.

2021-07-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Stream_Operation_OK): Reuse
        Is_Concurrent_Interface.
        * sem_ch3.adb (Analyze_Interface_Declaration,
        Build_Derived_Record_Type): Likewise.
        * sem_ch6.adb (Check_Limited_Return): Likewise.
        * sem_util.adb (Is_Concurrent_Interface): Don't call
        Is_Interface because each of the Is_Protected_Interface,
        Is_Synchronized_Interface and Is_Task_Interface calls it anyway.

2021-07-05  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_ch6.adb (Check_Limited_Return): Replace Comes_From_Source
        with Comes_From_Extended_Return_Statement.

2021-07-05  Steve Baird  <baird@adacore.com>

        * libgnat/a-stobbu.adb, libgnat/a-stobbu.ads,
        libgnat/a-stobfi.adb, libgnat/a-stobfi.ads,
        libgnat/a-stoubu.adb, libgnat/a-stoubu.ads,
        libgnat/a-stoufi.adb, libgnat/a-stoufi.ads,
        libgnat/a-stoufo.adb, libgnat/a-stoufo.ads,
        libgnat/a-stouut.adb, libgnat/a-stouut.ads,
        libgnat/a-stteou.ads: Delete files.
        * Makefile.rtl, impunit.adb: Remove references to deleted files.

2021-07-05  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Has_Compatible_Alignment_Internal): If the
        prefix of the Address expression is an entire object with a
        known alignment, then skip checks related to its size.

2021-07-05  Doug Rupp  <rupp@adacore.com>

        * libgnat/s-os_lib.ads: Import OS_Time comparison ops as
        intrinsic.
        * libgnat/s-os_lib.adb: Remove OS_TIme comparison ops
        implementation.

2021-07-05  Doug Rupp  <rupp@adacore.com>

        * libgnat/s-os_lib.ads: Add some comments about time_t.
        * libgnat/s-os_lib.adb (GM_Split/To_GM_Time): Rename formal to
        P_OS_Time.
        (GM_Time_Of/To_OS_Time): Likewise.

2021-07-05  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_res.adb (Resolve): Insert minus sign if needed.

2021-07-05  Steve Baird  <baird@adacore.com>

        * exp_put_image.adb:
        (Enable_Put_Image, Preload_Root_Buffer_Type): Revert to querying
        the -gnatd_z switch, as opposed to testing whether Ada_Version >= Ada_2022.

2021-07-05  Justin Squirek  <squirek@adacore.com>

        * checks.adb (Accessibility_Checks_Suppressed): Add check
        against restriction No_Dynamic_Accessibility_Checks.
        (Apply_Accessibility_Check): Add assertion to check restriction
        No_Dynamic_Accessibility_Checks is not active.
        * debug.adb: Add documentation for new debugging switch to
        control which accessibility model gets employed under
        restriction No_Dynamic_Accessibility_Checks.
        * exp_attr.adb (Expand_N_Attribute_Reference): Disable dynamic
        accessibility check generation when
        No_Dynamic_Accessibility_Checks is active.
        * exp_ch4.adb (Apply_Accessibility_Check): Skip check generation
        when restriction No_Dynamic_Accessibility_Checks is active.
        (Expand_N_Allocator): Disable dynamic accessibility checks when
        No_Dynamic_Accessibility_Checks is active.
        (Expand_N_In): Disable dynamic accessibility checks when
        No_Dynamic_Accessibility_Checks is active.
        (Expand_N_Type_Conversion): Disable dynamic accessibility checks
        when No_Dynamic_Accessibility_Checks is active.
        * exp_ch5.adb (Expand_N_Assignment_Statement): Disable
        alternative accessibility model calculations when computing a
        dynamic level for a SAOAAT.
        * exp_ch6.adb (Add_Call_By_Copy_Code): Disable dynamic
        accessibility check generation when
        No_Dynamic_Accessibility_Checks is active.
        (Expand_Branch): Disable alternative accessibility model
        calculations.
        (Expand_Call_Helper): Disable alternative accessibility model
        calculations.
        * restrict.adb, restrict.ads: Add new restriction
        No_Dynamic_Accessibility_Checks.
        (No_Dynamic_Accessibility_Checks_Enabled): Created to test when
        experimental features (which are generally incompatible with
        standard Ada) can be enabled.
        * sem_attr.adb (Safe_Value_Conversions): Add handling of new
        accessibility model under the restriction
        No_Dynamic_Accessibility_Checks.
        * sem_prag.adb (Process_Restrictions_Or_Restriction_Warnings):
        Disallow new restriction No_Dynamic_Accessibility_Checks from
        being exclusively specified within a body or subunit without
        being present in a specification.
        * sem_res.adb (Check_Fully_Declared_Prefix): Minor comment
        fixup.
        (Valid_Conversion): Omit implicit conversion checks on anonymous
        access types and perform static checking instead when
        No_Dynamic_Accessibility_Checks is active.
        * sem_util.adb, sem_util.ads (Accessibility_Level): Add special
        handling of anonymous access objects, formal parameters,
        anonymous access components, and function return objects.
        (Deepest_Type_Access_Level): When
        No_Dynamic_Accessibility_Checks is active employ an alternative
        model. Add paramter Allow_Alt_Model to override the new behavior
        in certain cases.
        (Type_Access_Level): When No_Dynamic_Accessibility_Checks is
        active employ an alternative model. Add parameter
        Allow_Alt_Model to override the new behavior in certain cases.
        (Typ_Access_Level): Created within Accessibility_Level for
        convenience.
        * libgnat/s-rident.ads, snames.ads-tmpl: Add handing for
        No_Dynamic_Accessibility_Checks.

2021-07-05  Doug Rupp  <rupp@adacore.com>

        * adaint.h (__gnat_set_file_time_name): Use OS_Time.
        * adaint.c (__gnat_set_file_time_name): Likewise.

2021-07-05  Doug Rupp  <rupp@adacore.com>

        * adaint.h (OS_Time): typedef as long long.
        * osint.adb (Underlying_OS_Time): Declare as 64-bit signed type.
        * libgnat/s-os_lib.adb ("<"): Compare OS_Time as
        Long_Long_Integer.
        ("<="): Likewise.
        (">"): Likewise.
        (">="): Likewise.
        * libgnat/s-os_lib.ads (OS_Time): Declare as 64-bit signed type.

2021-07-05  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_ch3.adb (Check_Abstract_Overriding): Post error message on
        renaming node.

2021-07-05  Yannick Moy  <moy@adacore.com>

        * libgnat/a-uncdea.ads: Add Depends/Post to
        Ada.Unchecked_Deallocation.
        * sem_ch4.adb (Analyze_Allocator): Remove checking of allocator
        placement.
        * sem_res.adb (Flag_Object): Same.

2021-07-05  Ghjuvan Lacambre  <lacambre@adacore.com>

        * aspects.ads: Add GNAT_Annotate aspect.
        * gnat1drv.adb (Adjust_Global_Switches): Stop defining
        Name_Gnat_Annotate as an alias of Name_Annotate.
        * snames.ads-tmpl: Define Gnat_Annotate.
        * par-prag.adb, sem_prag.ads: Add Pragma_Gnat_Annotate to list
        of pragmas.
        * lib-writ.adb, sem_ch13.adb, sem_prag.adb: Handle Gnat_Annotate
        like Aspect_Annotate.

2021-07-05  Piotr Trojanek  <trojanek@adacore.com>

        * ttypes.ads (Target_Strict_Alignment): Fix comment.

2021-07-05  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Has_Compatible_Alignment_Internal): Fix
        indentation of ELSIF comments; remove explicit calls to
        UI_To_Int; remove extra parens around the MOD operand.

2021-07-05  Ed Schonberg  <schonberg@adacore.com>

        * sem_aggr.adb (Resolve_Record_Aggregate, Step_5): Do not check
        for the need to use an extension aggregate for a given component
        when within an instance and the type of the component hss a
        private ancestor: the instantiation is legal if the generic
        compiles, and spurious errors may be generated otherwise.

2021-07-05  Ghjuvan Lacambre  <lacambre@adacore.com>

        * errout.adb (Output_JSON_Message): Recursively call
        Output_JSON_Message for continuation messages instead of
        appending their content to the initial message.

2021-07-05  Steve Baird  <baird@adacore.com>

        * debug.adb: Remove comments about -gnatd_z switch.
        * exp_ch3.adb (Make_Predefined_Primitive_Specs): A one-line fix
        for a subtle bug that took some effort to debug. Append a new
        Put_Image procedure for a type extension even if it seems to
        already have one, just as is done for (for example) the
        streaming-related Read procedure.
        * exp_put_image.adb:
        (Build_Record_Put_Image_Procedure.Make_Component_Attributes): Do
        not treat _Parent component like just another component, for two
        reasons.  1. If the _parent component's type has a
        user-specified Put_Image procedure, then we want to generate a
        call to that procedure and then generate extension aggregate
        syntax.  2. Otherwise, we still don't want to see any mention of
        "_parent" in the generated image text.
        (Build_Record_Put_Image_Procedure.Make_Component_Name): Add
        assertion that we are not generating a reference to an "_parent"
        component.
        (Build_Record_Put_Image_Procedure): Add special treatment for
        null records.  Add call to Duplicate_Subexpr for image attribute
        prefix in order to help with expansion needed in the class-wide
        case (where the prefix is also referenced in the call to
        Wide_Wide_Expanded_Name) if evaluation of the prefix has side
        effects. Add new local helper function, Put_String_Exp.  Add
        support for case where prefix type is class-wide.
        (Enable_Put_Image, Preload_Root_Buffer_Type): Query Ada_Version
        > Ada_2022 instead of (indirectly) querying -gnatd_z switch.
        * freeze.adb (In_Expanded_Body): A one-line change to add
        TSS_Put_Image to the list of subprograms that have
        expander-created bodies.
        * rtsfind.ads: Add support for accessing
        Ada.Tags.Wide_Wide_Expanded_Name.
        * sem_ch3.ads, sem_ch3.adb: Delete Is_Null_Extension function,
        as part of moving it to Sem_Util.
        * sem_ch13.adb
        (Analyze_Put_Image_TSS_Definition.Has_Good_Profile): Improve
        diagnostic messages in cases where the result is going to be
        False and the Report parameter is True. Relax overly-restrictive
        checks in order to implement mode conformance.
        (Analyze_Stream_TSS_Definition.Has_Good_Profile): Add similar
        relaxation of parameter subtype checking for the Stream
        parameter of user-defined streaming subprograms.
        * sem_disp.adb (Check_Dispatching_Operation): A one-line
        change (and an accompanying comment change) to add TSS_Put_Image
        to the list of compiler-generated dispatching primitive
        operations.
        * sem_util.ads, sem_util.adb: Add Ignore_Privacy Boolean
        parameter to Is_Null_Record_Type function (typically the
        parameter will be False when the function is being used in the
        implementation of static semantics and True for dynamic
        semantics; the parameter might make a difference in the case of,
        for example, a private type that is implemented as a null record
        type).  Add related new routines Is_Null_Extension (formerly
        declared in Sem_Ch3), Is_Null_Extension_Of, and
        Is_Null_Record_Definition.

2021-07-05  Justin Squirek  <squirek@adacore.com>

        * freeze.adb (Freeze_Profile): Use N's Sloc, F_type's chars.

2021-07-05  Bob Duff  <duff@adacore.com>

        * checks.adb, exp_aggr.adb, exp_ch5.adb, freeze.adb,
        sem_util.adb, sem_util.ads: Change L and H to be First and Last,
        to match the attributes in the RM. Change calls from procedure
        to function where appropriate.

2021-07-05  Bob Duff  <duff@adacore.com>

        * sem_util.ads, sem_util.adb (Compute_Returns_By_Ref): New
        procedure to compute Returns_By_Ref, to avoid some code
        duplication. This will likely change soon, so it's good to have
        the code in one place.
        (CW_Or_Has_Controlled_Part): Move here from Exp_Ch7, because
        it's called by Compute_Returns_By_Ref, and this is a better
        place for it anyway.
        (Needs_Finalization): Fix comment to be vague instead of wrong.
        * exp_ch6.adb (Expand_N_Subprogram_Body, Freeze_Subprogram):
        Call Compute_Returns_By_Ref.
        * sem_ch6.adb (Check_Delayed_Subprogram): Call
        Compute_Returns_By_Ref.
        * exp_ch7.ads, exp_ch7.adb (CW_Or_Has_Controlled_Part): Move to
        Sem_Util.
        (Has_New_Controlled_Component): Remove unused function.

2021-07-05  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_ch3.adb (Check_Abstract_Overriding): Check for renamings.

2021-07-05  Boris Yakobowski  <yakobowski@adacore.com>

        * exp_ch4.adb (Expand_N_Op_Rem): Remove special case for rem -1
        in CodePeer_Mode.

2021-07-01  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/101094
        * exp_attr.adb (Get_Integer_Type): Return an integer type with the
        same signedness as the input type.

2021-06-29  Richard Kenner  <kenner@adacore.com>

        * sem_util.adb (Visit_Node): Add handling for N_Block_Statement
        with declarations.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * einfo-utils.adb
        (Unknown_Alignment): Simply negate the Known_ counterpart.
        (Unknown_Component_Bit_Offset): Likewise.
        (Unknown_Esize): Likewise.
        (Unknown_Normalized_First_Bit): Likewise.
        (Unknown_Normalized_Position): Likewise.
        (Unknown_Normalized_Position_Max): Likewise.
        (Unknown_RM_Size): Likewise.

2021-06-29  Boris Yakobowski  <yakobowski@adacore.com>

        * exp_ch4.adb (Expand_N_Op_Mod): Remove special case for mod -1
        in CodePeer_Mode.

2021-06-29  Aleksandra Pasek  <pasek@adacore.com>

        * libgnat/s-objrea.adb (EM_AARCH64): New Constant.
        (Initialize): Handle EM_AARCH64 case.
        (Read_Address): Handle AARCH64 case.
        * libgnat/s-objrea.ads (Object_Arch): Add AARCH64 record
        component.

2021-06-29  Bob Duff  <duff@adacore.com>

        * sem_ch13.adb (Analyze_Record_Representation_Clause): Call
        Set_Entity_With_Checks instead of Set_Entity, so we perform the
        check for correct casing.
        * style.adb (Check_Identifier): Minor comment improvement.
        Cleanup overly complicated code.

2021-06-29  Ed Schonberg  <schonberg@adacore.com>

        * exp_aggr.adb (Convert_Aggr_In_Object_Decl): After expansion of
        the aggregate, the expression can be removed from the
        declaration, except if the object is class-wide, in which case
        the aggregate provides the actual type. In other cases the
        presence of the expression may lead to spurious freezing issue.
        * exp_ch3.adb (Expand_N_Object_Declaration): If the expression
        in the declaration is an aggregate with delayed expansion (as is
        the case for objects of a limited type, or a subsequent address
        specification) the aggregate must be resolved at this point.
        This resolution must not include expansion, because the
        expansion of the enclosing declaration will construct the
        necessary aggregate expansion.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * errout.ads (Adjust_Name_Case): Remove obsolete and now unused
        variant.
        * errout.adb (Adjust_Name_Case): Likewise; fix variant that uses
        a custom buffer to also use it for names in Standard_Location.

2021-06-29  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_ch12.adb (Freeze_Subprogram_Body): Add missing "freeze".
        (Install_Body): Likewise.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * adaint.c (__gnat_portable_spawn): Revert change that
        introduced setting of __gnat_in_child_after_fork.

2021-06-29  Patrick Bernardi  <bernardi@adacore.com>

        * libgnarl/s-tasdeb.ads (Known_Tasks): Add Atomic_Components
        aspect.

2021-06-29  Doug Rupp  <rupp@adacore.com>

        * Makefile.rtl (x86_64-vx7r2) [EXTRA_GNATRTL_TASKING_OBJS]: Move
        i-vxinco.o out of RTP runtime.

2021-06-29  Claire Dross  <dross@adacore.com>

        * libgnat/a-cfdlli.ads: Use pragma Assertion_Policy to disable
        pre and postconditions.
        * libgnat/a-cfhama.ads: Likewise.
        * libgnat/a-cfhase.ads: Likewise.
        * libgnat/a-cfinve.ads: Likewise.
        * libgnat/a-cforma.ads: Likewise.
        * libgnat/a-cforse.ads: Likewise.
        * libgnat/a-cofove.ads: Likewise.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.ads (Get_Fullest_View): Refill comment; remove extra
        extra after period.
        * sem_util.adb (Get_Fullest_View): Fix style.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch3.adb (Analyze_Declarations): Remove explicit check for
        missing, because a subsequent call to Is_Empty_List will detect
        them anyway.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * freeze.adb (Freeze_All): Simplify by reusing
        Is_Subprogram_Or_Entry.
        * sem_ch11.adb (Analyze_Handled_Statement): Likewise.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Warn_On_Overlapping_Actuals): Prevent cascaded
        errors once for the subprogram call, not for every pair of
        actual parameters.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch3.adb (Is_Local_Type): Simplify by reusing Scope_Within.

2021-06-29  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch6.ads (Can_Override_Operator): Function declaration
        moved from package body to package spec.
        * sem_ch6.adb (Check_Overriding_Indicator): Now use test of
        whether the subprogram's Chars is an operator name, to handle
        cases of function instances whose entity is
        N_Defining_Identifier rather than N_Defining_Operator_Symbol.
        (Can_Override_Operator): Function declaration moved to package
        spec.  Now use test of whether the subprogram's Chars is an
        operator name, to handle cases of function instances whose
        entity is N_Defining_Identifier rather than
        N_Defining_Operator_Symbol.
        * sem_ch8.adb (Analyze_Renamed_Subprogram): Check for
        possibility of an overridden predefined operator, and suppress
        the "not overriding" message in that case.

2021-06-29  Doug Rupp  <rupp@adacore.com>

        * Makefile.rtl: Add a new ifeq for vx7r2 shared gnatlib.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * exp_attr.adb (Build_Array_VS_Func): Restore uses of
        Validated_View.
        (Build_Record_VS_Func): Likewise.
        (Expand_N_Attribute_Reference): Likewise.
        * sem_util.adb (Validated_View): Behave as an identity function
        for arrays and scalars.

2021-06-29  Bob Duff  <duff@adacore.com>

        * atree.adb, atree.ads (Parent, Set_Parent): Assert node is
        Present.
        (Copy_Parent, Parent_Kind): New helper routines.
        * gen_il-gen.adb: Add with clause.
        * nlists.adb (Parent): Assert Parent of list is Present.
        * aspects.adb, checks.adb, exp_aggr.adb, exp_ch6.adb,
        exp_util.adb, lib-xref-spark_specific.adb, osint.ads,
        sem_ch12.adb, sem_ch13.adb, sem_ch3.adb, sem_ch6.adb,
        sem_dim.adb, sem_prag.adb, sem_res.adb, sem_util.adb,
        treepr.adb: Do not call Parent and Set_Parent on the Empty node.
        * libgnat/a-stwiun__shared.adb, libgnat/a-stzunb__shared.adb:
        Minor: Fix typos in comments.
        * einfo.ads: Minor comment update.
        * sinfo-utils.ads, sinfo-utils.adb (Parent_Kind, Copy_Parent):
        New functions.

2021-06-29  Eric Botcazou  <ebotcazou@adacore.com>

        * repinfo-input.adb (Read_JSON_Stream): Fix typo.

2021-06-29  Eric Botcazou  <ebotcazou@adacore.com>

        * rtsfind.ads (RE_Id): Change RE_Valid_Enumeration_Value_NN into
        RE_Valid_Value_Enumeration_NN.
        (RE_Unit_Table): Adjust to above renaming.
        * exp_imgv.adb (Expand_Valid_Value_Attribute): Likewise.
        * libgnat/s-valuen.ads (Invalid): Remove.
        (Value_Enumeration_Pos): Move to...
        * libgnat/s-valuen.adb (Value_Enumeration_Pos): ...here.
        Return -1 instead of Invalid.
        (Value_Enumeration): Compare against 0 instead of Invalid.
        (Valid_Enumeration_Value): Likewise.  Rename to...
        (Valid_Value_Enumeration): ...this.
        * libgnat/s-vaenu8.ads (Valid_Enumeration_Value_8): Rename into...
        (Valid_Value_Enumeration_8): ...this.
        * libgnat/s-vaen16.ads (Valid_Enumeration_Value_16): Rename into...
        (Valid_Value_Enumeration_16): ...this.
        * libgnat/s-vaen32.ads (Valid_Enumeration_Value_32): Rename into...
        (Valid_Value_Enumeration_32): ...this.

2021-06-29  Bob Duff  <duff@adacore.com>

        * einfo.ads (Component_Bit_Offset, Component_Size): Update
        documentation: Repinfo is the package where these negative
        values are documented.
        * einfo-utils.adb (Known_Component_Size,
        Known_Static_Component_Size, Unknown_Component_Size): Remove
        calls to Implementation_Base_Type, because Component_Size is an
        Impl_Base_Type_Only field (see Gen_Entities).
        * sem_ch13.ads, sem_ch13.adb (Check_Size): Do not set Esize and
        RM_Size. This is unnecessary in the case of Size. For
        Component_Size, it is wrong, because we would be setting the
        Esize and RM_Size of the component type.

2021-06-29  Pascal Obry  <obry@adacore.com>

        * s-oscons-tmplt.c: Add some OS constants.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.ads (Validated_View): Fix style in comment.
        * sem_util.adb (Validated_View): Rewrite in recursive style.

2021-06-29  Eric Botcazou  <ebotcazou@adacore.com>

        * Make-generated.in (ada/stamp-gen_il): Ignore errors from
        running gen_il-main.

2021-06-29  Richard Kenner  <kenner@adacore.com>

        * gen_il-gen-gen_entities.adb (Record_Field_Kind,
        Allocatable_Kind): Add new abstract kinds.
        (Constant_Or_Variable_Kind): Likewise.
        (E_Constant, E_Variable, E_Loop_Parameter): Use them.
        (E_Discriminant, E_Component): Likewise.
        * gen_il-types.ads (type Opt_Type_Enum): Add them.

2021-06-29  Bob Duff  <duff@adacore.com>

        * gen_il-gen.adb (Put_C_Type_And_Subtypes): Put the correct
        numbers.
        * gen_il-internals.ads, gen_il-internals.adb: (Pos): Remove this
        function. It was assuming that the order of the enumeration
        literals in Type_Enum is the same as the order of the generated
        types Node_Kind and Entity_Kind, which is not true.

2021-06-29  Piotr Trojanek  <trojanek@adacore.com>

        * exp_attr.adb (Expand_N_Attribute_Reference): Explicitly use
        Validated_View for record objects.

2021-06-28  Martin Sebor  <msebor@redhat.com>

        * gcc-interface/trans.c (Handled_Sequence_Of_Statements_to_gnu):
        Replace TREE_NO_WARNING with suppress_warning.
        (gnat_gimplify_expr): Same.
        * gcc-interface/utils.c (gnat_pushdecl): Same.

2021-06-21  Gary Dismukes  <dismukes@adacore.com>

        * checks.adb (Selected_Range_Checks): In the case of a
        qualified_expression where the qualifying subtype is an
        unconstrained array subtype with fixed lower bounds for some of
        its indexes, generate tests to check that those bounds are equal
        to the corresponding lower bounds of the qualified array object.

2021-06-21  Bob Duff  <duff@adacore.com>

        * libgnat/s-valuen.ads (Value_Enumeration,
        Valid_Enumeration_Value): Inline.
        (Value_Enumeration_Pos): Add Pure_Function.

2021-06-21  Justin Squirek  <squirek@adacore.com>

        * doc/gnat_rm/implementation_defined_pragmas.rst: Document new
        feature under pragma Extensions_Allowed.
        * gnat_rm.texi: Regenerate.
        * errout.adb, errout.ads (Error_Msg_GNAT_Extension): Created to
        issue errors when parsing extension only constructs.
        * exp_ch11.adb, exp_ch11.ads (Expand_N_Raise_When_Statement):
        Created to expand raise ... when constucts.
        * exp_ch5.adb, exp_ch5.ads (Expand_N_Goto_When_Statement):
        Created to expand goto ... when constructs.
        * exp_ch6.adb, exp_ch6.ads (Expand_N_Return_When_Statement):
        Created to expand return ... when constructs.
        * expander.adb (Expand): Add case entries for "when" constructs.
        * gen_il-gen-gen_nodes.adb, gen_il-types.ads: Add entries for
        "when" constructs.
        * par-ch11.adb (P_Raise_Statement): Add processing for raise ...
        when.
        * par-ch5.adb (Missing_Semicolon_On_Exit): Renamed to
        Missing_Semicolon_On_When and moved to par-util.adb.
        * par-ch6.adb (Get_Return_Kind): Renamed from Is_Simple and
        processing added for "return ... when" return kind.
        (Is_Simple): Renamed to Get_Return_Kind.
        (P_Return_Statement): Add case for return ... when variant of
        return statement.
        * par-util.adb, par.adb (Missing_Semicolon_On_When): Added to
        centeralize parsing of "when" keywords in the context of "when"
        constructs.
        * sem.adb (Analyze): Add case for "when" constructs.
        * sem_ch11.adb, sem_ch11.ads (Analyze_Raise_When_Statement):
        Created to analyze raise ... when constructs.
        * sem_ch5.adb, sem_ch5.ads (Analyzed_Goto_When_Statement):
        Created to analyze goto ... when constructs.
        * sem_ch6.adb, sem_ch6.ads (Analyze_Return_When_Statement):
        Created to analyze return ... when constructs.
        * sprint.adb (Sprint_Node_Actual): Add entries for new "when"
        nodes.

2021-06-21  Steve Baird  <baird@adacore.com>

        * Make-generated.in (GEN_IL_FLAGS): Keep only GNAT flags.
        (ada/stamp-gen_il): Remove dependencies on libgnat/ sources.  Do not
        copy libgnat/ sources locally and tidy up.
        * Makefile.rtl: Include object files for new Text_Buffer units
        in the GNATRTL_NONTASKING_OBJS list.
        * exp_put_image.ads, exp_put_image.adb: Update Rtsfind calls to
        match new specs. For example, calls to RE_Sink are replaced with
        calls to RE_Root_Buffer_Type. Update comments and change
        subprogram names accordingly (e.g., Preload_Sink is changed to
        Preload_Root_Buffer_Type).
        * impunit.adb: Add 6 new predefined units (Text_Buffers and 5
        child units thereof).
        * rtsfind.ads, rtsfind.adb: Add interfaces for accessing the
        Ada.Strings.Text_Buffers package and declarations
        therein (including the Unbounded child unit). Do not (yet)
        delete interfaces for accessing the old Text_Output package.
        * sem_attr.adb (Check_Put_Image_Attribute): Replace RE_Sink uses
        with RE_Root_Buffer_Type and update comments accordingly.
        * sem_ch10.adb (Analyze_Compilation_Unit): Update call to
        reflect name change of callee (that is, the former Preload_Sink
        is now Preload_Root_Buffer_Type).
        * sem_ch13.adb (Has_Good_Profile): Replace RE_Sink use with
        RE_Root_Buffer_Type.
        (Build_Spec): Update comment describing a parameter type.
        * gen_il.ads: Remove clauses for the old Text_Output package and
        add them for Ada.Streams.Stream_IO.
        (Sink): Declare.
        (Create_File): Likewise.
        (Increase_Indent): Likewise.
        (Decrease_Indent): Likewise.
        (Put): Likewise.
        (LF): Likewise.
        * gen_il.adb: Add clauses for Ada.Streams.Stream_IO.
        (Create_File): New procedure.
        (Increase_Indent): Likewise.
        (Decrease_Indent): Likewise.
        (Put): New procedures.
        * gen_il-gen.adb: Add clauses for Ada.Text_IO.  Replace
        Sink'Class with Sink throughout.  Use string concatenation and
        LF marker instead of formatted strings and "\n" marker.  Update
        Indent/Outdent calls to use new Increase_Indent/Decrease_Indent
        names.
        (Put_Membership_Query_Decl): Remove.
        * gen_il-internals.ads: Replace Sink'Class with Sink throughout.
        (Ptypes): Remove.
        (Pfields): Likewise.
        * gen_il-internals.adb: Remove clauses for GNAT.OS_Lib and
        Ada.Strings.Text_Buffers.Files.  Replace Sink'Class with Sink
        throughout.  Use string concatenation and LF marker instead of
        formatted strings and "\n" marker.
        (Stdout): Remove.
        (Ptypes): Likewise.
        (Pfields): Likewise.
        * libgnarl/s-putaim.ads: Modify context clause, update
        declaration of subtype Sink to refer to
        Text_Buffers.Root_Buffer_Type instead of the old
        Text_Output.Sink type.
        * libgnarl/s-putaim.adb: Modify context clause and add use
        clause to refer to Text_Buffers package.
        * libgnat/a-cbdlli.ads, libgnat/a-cbdlli.adb,
        libgnat/a-cbhama.ads, libgnat/a-cbhama.adb,
        libgnat/a-cbhase.ads, libgnat/a-cbhase.adb,
        libgnat/a-cbmutr.ads, libgnat/a-cbmutr.adb,
        libgnat/a-cborma.ads, libgnat/a-cborma.adb,
        libgnat/a-cborse.ads, libgnat/a-cborse.adb,
        libgnat/a-cdlili.ads, libgnat/a-cdlili.adb,
        libgnat/a-cidlli.ads, libgnat/a-cidlli.adb,
        libgnat/a-cihama.ads, libgnat/a-cihama.adb,
        libgnat/a-cihase.ads, libgnat/a-cihase.adb,
        libgnat/a-cimutr.ads, libgnat/a-cimutr.adb,
        libgnat/a-ciorma.ads, libgnat/a-ciorma.adb,
        libgnat/a-ciormu.ads, libgnat/a-ciormu.adb,
        libgnat/a-ciorse.ads, libgnat/a-ciorse.adb,
        libgnat/a-coboho.ads, libgnat/a-coboho.adb,
        libgnat/a-cobove.ads, libgnat/a-cobove.adb,
        libgnat/a-cohama.ads, libgnat/a-cohama.adb,
        libgnat/a-cohase.ads, libgnat/a-cohase.adb,
        libgnat/a-coinho.ads, libgnat/a-coinho.adb,
        libgnat/a-coinho__shared.ads, libgnat/a-coinho__shared.adb,
        libgnat/a-coinve.ads, libgnat/a-coinve.adb,
        libgnat/a-comutr.ads, libgnat/a-comutr.adb,
        libgnat/a-convec.ads, libgnat/a-convec.adb,
        libgnat/a-coorma.ads, libgnat/a-coorma.adb,
        libgnat/a-coormu.ads, libgnat/a-coormu.adb,
        libgnat/a-coorse.ads, libgnat/a-coorse.adb,
        libgnat/a-nbnbin.ads, libgnat/a-nbnbin.adb,
        libgnat/a-nbnbin__gmp.adb, libgnat/a-nbnbre.ads,
        libgnat/a-nbnbre.adb, libgnat/a-strunb.ads,
        libgnat/a-strunb.adb, libgnat/a-strunb__shared.ads,
        libgnat/a-strunb__shared.adb, libgnat/s-rannum.ads,
        libgnat/s-rannum.adb: Modify Put_Image procedure used in
        Put_Image aspect specification to conform to Ada profile
        rules (in particular, the first parameter shall be of type
        Ada.Strings.Text_Buffers.Root_Buffer_Type'Class).
        * libgnat/a-sttebu.ads, libgnat/a-sttebu.adb,
        libgnat/a-stbubo.ads, libgnat/a-stbubo.adb,
        libgnat/a-stbufi.ads, libgnat/a-stbufi.adb,
        libgnat/a-stbufo.ads, libgnat/a-stbufo.adb,
        libgnat/a-stbuun.ads, libgnat/a-stbuun.adb,
        libgnat/a-stbuut.ads, libgnat/a-stbuut.adb: A new predefined
        unit, Ada.Strings.Text_Buffers, and five child units.  Two of
        the five are RM-defined: Bounded and Unbounded. The remaining
        three are GNAT-defined: Files, Utils, and Formatting. The buffer
        type corresponding to an output file, type Files.File_Buffer, is
        simpler (and perhaps therefore slower) than its predecessor.
        Caching similar to what was being done before could be added
        later if that seems appropriate.
        * libgnat/s-putima.ads: Modify context clause, update
        declaration of subtype Sink to refer to
        Text_Buffers.Root_Buffer_Type instead of the old
        Text_Output.Sink type.
        * libgnat/s-putima.adb: Modify context clause.  Update
        Indent/Outdent calls to use new Increase_Indent/Decrease_Indent
        names; ditto for "Put_String => Put" name change.
        * libgnat/a-stteou__bootstrap.ads: Delete.

2021-06-21  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_ch5.adb (Expand_Assign_Array_Bitfield_Fast): If big-endian
        ordering is in effect for the operands and they are small,
        adjust the unchecked conversions done around them.

2021-06-21  Richard Kenner  <kenner@adacore.com>

        * einfo.ads (Return_Statement): Add documentation.
        * exp_ch6.adb (Expand_N_Extended_Return_Statement): Set it.
        * gen_il-fields.ads: Add it.
        * gen_il-gen-gen_entities.adb: Add it.

2021-06-21  Bob Duff  <duff@adacore.com>

        * rtsfind.ads, libgnat/s-bitfie.ads, libgnat/s-bituti.adb,
        libgnat/s-bituti.ads (Fast_Copy_Bitfield): New run-time library
        function to copy bit fields faster than Copy_Bitfield. Cannot be
        called with zero-size bit fields.  Remove obsolete ??? comments
        from s-bituti.adb; we already do "avoid calling this if
        Forwards_OK is False".
        * exp_ch5.adb (Expand_Assign_Array_Loop_Or_Bitfield,
        Expand_Assign_Array_Bitfield_Fast): Generate calls to
        Fast_Copy_Bitfield when appropriate.
        * sem_util.adb, sem_util.ads (Get_Index_Bounds): Two new
        functions for getting the index bounds. These are more
        convenient than the procedure of the same name, because they can
        be used to initialize constants.

2021-06-21  Ed Schonberg  <schonberg@adacore.com>

        * gen_il-fields.ads: Add Default_Subtype_Mark to enumeration
        type for fields.
        * gen_il-gen-gen_nodes.adb: Add call to create new field for
        Formal_Type_Declaration node.
        * par-ch12.adb (P_Formal_Type_Declaration): in Ada_2022 mode,
        recognize new syntax for default: "or use subtype_mark".
        (P_Formal_Type_Definition): Ditto for the case of a formal
        incomplete type.
        * sinfo.ads: Add field Default_Subtype_Mark to
        N_Formal_Type_Declaration.
        * sem_ch12.adb (Validate_Formal_Type_Default): New procedure, to
        apply legality rules to default subtypes in formal type
        declarations. Some legality rules apply to all defaults, such as
        the requirement that the default for a formal type that depends
        on previous formal entities must itself be a previously declared
        formal of the same unit. Other checks are kind- specific.
        (Analyze_Associations): Use specified default if there is no
        actual provided for a formal type in an instance.
        (Analyze_Formal_Type_Declaration): Call
        Validate_Formal_Type_Default when default subtype is present.

2021-06-21  Bob Duff  <duff@adacore.com>

        * libgnat/s-valuen.ads, libgnat/s-valuen.adb
        (Value_Enumeration_Pos): New function to compute the 'Pos of the
        enumeration literal for a given String.  Return a special value
        instead of raising an exception on invalid input. Called by both
        Valid_Enumeration_Image and Value_Enumeration.
        (Valid_Enumeration_Image): Return a Boolean indicating whether
        the String is a valid Image for the given enumeration type.
        (Value_Enumeration): Implement in terms of
        Value_Enumeration_Pos.
        * libgnat/s-vaenu8.ads, libgnat/s-vaen16.ads,
        libgnat/s-vaen32.ads: Rename Valid_Enumeration_Image from the
        instances.
        * libgnat/s-valuti.ads: Correct documentation (it was not true
        for the null string).
        * libgnat/s-valuti.adb (Normalize_String): Do not raise
        Constraint_Error for the null string, nor strings containing
        nothing but blanks, so that Valid_Enumeration_Image can return
        False in these cases, rather than raising an exception.
        * rtsfind.ads (RE_Value_Enumeration_8, RE_Value_Enumeration_16,
        RE_Value_Enumeration_32): New functions.
        (RTE_Available): Improve comment (E doesn't have to be a
        subprogram, although that's the usual case).
        * sem_attr.adb (nalid_Value): Semantic analysis for new
        attribute.
        * exp_attr.adb: Call Expand_Valid_Value_Attribute for new
        attribute.
        * exp_imgv.ads, exp_imgv.adb (Expand_Valid_Value_Attribute): New
        procedure to expand Valid_Value into a call to
        Valid_Enumeration_Image_NN.
        (Expand_Value_Attribute): Misc code cleanups.  Remove two ???
        mark comments. RTE_Available won't work here.  For one thing,
        RTE_Available (X) shouldn't be called until the compiler has
        decided to make use of X (see comments on RTE_Available), and in
        this case we're trying to AVOID calling something.
        * snames.ads-tmpl: New attribute name.
        * doc/gnat_rm/implementation_defined_attributes.rst: Document
        new attribute.
        * gnat_rm.texi: Regenerate.

2021-06-21  Eric Botcazou  <ebotcazou@adacore.com>

        * fe.h (Assume_No_Invalid_Values): Declare.
        * opt.ads (Assume_No_Invalid_Values): Add warning comment.

2021-06-21  Bob Duff  <duff@adacore.com>

        * libgnat/s-bituti.ads (Small_Size): Do not include 0 in this
        type.
        * libgnat/s-bituti.adb (Copy_Bitfield): Do nothing for 0-bit
        bitfields.

2021-06-21  Ghjuvan Lacambre  <lacambre@adacore.com>

        * exp_ch9.adb (Build_Simple_Entry_Call): Add comment.
        * libgnat/s-rannum.adb (Random): Update comment.
        * libgnat/s-rannum.ads (Generator): Update comment.

2021-06-21  Piotr Trojanek  <trojanek@adacore.com>

        * doc/gnat_rm/representation_clauses_and_pragmas.rst (Address
        Clauses): Fix unbalanced parens.
        * gnat_rm.texi: Regenerate.

2021-06-21  Ghjuvan Lacambre  <lacambre@adacore.com>

        * errout.adb (Handle_Serious_Error): Capitalize comment.
        * exp_dbug.adb (Set_Entity_Name): Capitalize sentence.
        * exp_dist.adb (Expand_All_Calls_Remote_Subprogram_Call): Fix
        typo.
        * sem_ch3.adb (Modular_Type_Declaration): Add space after comma.

2021-06-21  Ghjuvan Lacambre  <lacambre@adacore.com>

        * debug.adb: Document -gnatd_U as taken.
        * err_vars.ads (Warning_Doc_Switch): Set to True.
        * errout.ads (Errout): Update documentation.
        * gnat1drv.adb (Adjust_Global_Switches): React to -gnatd_U.
        * hostparm.ads (Tag_Errors): Set to True.
        * opt.ads (Unique_Error_Tag): Document -gnatd_U.

2021-06-21  Eric Botcazou  <ebotcazou@adacore.com>

        * urealp.ads (UR_Write_To_JSON): Declare.
        * urealp.adb (Decimal_Exponent_Hi): Treat numbers in base 10
        specially and rewrite handling of numbers in other bases.
        (Decimal_Exponent_Lo): Likewise.
        (Normalize): Minor tweak.
        (UR_Write_To_JSON): New wrapper procedure around UR_Write.
        * repinfo.adb (List_Type_Info): When the output is to JSON, call
        UR_Write_To_JSON instead of UR_Write.

2021-06-21  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Indexed_Component_Bit_Offset): Return an unknown
        offset for components within multidimensional arrays; remove
        redundant parens.

2021-06-21  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Find_Overlaid_Entity): Ignore references to
        components and discriminants.

2021-06-21  Doug Rupp  <rupp@adacore.com>

        * Makefile.rtl (aarch64-linux) [LIBGNAT_TARGET_PAIRS]: Add
        $(TRASYM_DWARF_UNIX_PAIRS).
        [EXTRA_GNAT_RTL_NONTASKING_OBJS]: Add $(TRASYM_DWARF_UNIX_OBJS)

2021-06-21  Gary Dismukes  <dismukes@adacore.com>

        * exp_util.adb (Expand_Sliding_Conversion): Only perform
        expansion when Expander_Active is True. Add a comment about this
        and refine existing comment regarding string literals.

2021-06-21  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Denotes_Same_Object): Simplify handling of
        slices.

2021-06-21  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Is_Object_Renaming): Rename from Is_Renaming;
        simplify; adapt callers.

2021-06-21  Frederic Konrad  <konrad@adacore.com>

        * Makefile.rtl: Compiles both static and dynamic libgnat for
        powerpc64-wrs-vxworks7r2.

2021-06-18  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch3.adb (Constrain_Array): Add error checking for
        fixed-lower-bound and constrained index ranges applied
        inappropriately on subtypes of unconstrained and
        fixed-lower-bound array types.
        (Constrain_Index): Correct and refine comment related to
        fixed-lower-bound index ranges.

2021-06-18  Bob Duff  <duff@adacore.com>

        * gen_il-gen.adb: Improve comments.
        * snames.ads-tmpl (Convention_Id): Remove "--  Plenty of space
        for expansion", because that's irrelevant now that we are no
        longer laying out node fields by hand.

2021-06-18  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Denotes_Same_Object): Handle character literals
        just like integer literals.

2021-06-18  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Denotes_Same_Object): Explicitly test for node
        kinds being the same; deal with renamings one-by-one; adjust
        numbers in references to the Ada RM.

2021-06-18  Bob Duff  <duff@adacore.com>

        * sprint.adb (Write_Source_Line): Check for EOF in
        Line_Terminator loop.  Note that when a source file is read in,
        an EOF character is added to the end.

2021-06-18  Piotr Trojanek  <trojanek@adacore.com>

        * sem_aux.adb (Package_Specification): Add assertions to confirm
        the kind of the of parameter and returned node.
        * sem_ch12.adb (Remove_Parent): Reorder conditions; this change
        appears to be semantically neutral, but is enough to avoid the
        problematic call to Package_Specification.
        * sem_util.adb (Is_Incomplete_Or_Private_Type): Replace loop
        with a call to Package_Specification.

2021-06-18  Bob Duff  <duff@adacore.com>

        * sem_attr.adb (Eval_Attribute): For Enum_Lit'Size, use
        Enum_Type'Object_Size.

2021-06-18  Olivier Hainque  <hainque@adacore.com>

        * sigtramp-vxworks-target.inc (__aarch64__): Sync
        REGNO_PC_OFFSET with the back-end DWARF_ALT_FRAME_RETURN_COLUMN.
        In CFI_COMMON_REGS, leave r18 alone, VxWorks private.

2021-06-18  Javier Miranda  <miranda@adacore.com>

        * contracts.adb (Process_Spec_Postconditions): Add missing
        support for aliased subprograms and handle wrappers of
        class-wide pre/post conditions.
        (Process_Inherited_Preconditions): Add missing support for
        aliased subprograms and handle wrappers of class-wide pre/post
        conditions.
        * einfo.ads (Class_Wide_Clone): Fix typo.
        (Is_Class_Wide_Clone): Removed since it is not referenced.
        (Is_Wrapper): Documenting new flag.
        (LSP_Subprogram): Documenting new attribute.
        * exp_ch3.adb (Make_Controlling_Function_Wrappers): Decorate
        wrapper as Is_Wrapper and adjust call to
        Override_Dispatching_Operation.
        * freeze.adb (Build_Inherited_Condition_Pragmas): Fix typo in
        documentation.
        (Check_Inherited_Conditions): Handle LSP wrappers; ensure
        correct decoration of LSP wrappers.
        * gen_il-fields.ads (Is_Class_Wide_Clone): Removed.
        (Is_Wrapper): Added.
        (LSP_Subprogram): Added.
        * gen_il-gen-gen_entities.adb (Is_Class_Wide_Clone): Removed.
        (Is_Wrapper): Added.
        (LSP_Subprogram): Added.
        * gen_il-internals.adb (Image): Adding uppercase image of
        LSP_Subprogram.
        * sem_ch6.adb (New_Overloaded_Entity): Fix decoration of LSP
        wrappers.
        * sem_disp.ads (Override_Dispatching_Operation): Remove
        parameter Is_Wrapper; no longer needed.
        * sem_disp.adb (Check_Dispatching_Operation): Adjust assertion.
        (Override_Dispatching_Operation): Remove parameter Is_Wrapper;
        no longer needed.
        * treepr.adb (Image): Adding uppercase image of LSP_Subprogram.

2021-06-18  Arnaud Charlet  <charlet@adacore.com>

        * exp_ch4.adb (Expand_N_Quantified_Expression): Ensure the type
        of the name of a "for of" loop is frozen.
        * exp_disp.adb (Check_Premature_Freezing): Complete condition to
        take into account a private type completed by another private
        type now that the freezing rule are better implemented.
        * freeze.adb (Freeze_Entity.Freeze_Profile): Do not perform an
        early freeze on types if not in the proper scope. Special case
        expression functions that requires access to the dispatch table.
        (Should_Freeze_Type): New.
        * sem_ch13.adb (Resolve_Aspect_Expressions): Prevent assert
        failure in case of an invalid tree (previous errors detected).
        * sem_res.adb (Resolve): Remove kludge related to entities
        causing incorrect premature freezing.
        * sem_util.adb (Ensure_Minimum_Decoration): Add protection
        against non base types.

2021-06-18  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch3.adb (Constrain_Index): Set the High_Bound of a
        fixed-lower-bound subtype's range to T (the subtype of the FLB
        index being constrained) rather than Base_Type (T).

2021-06-18  Bob Duff  <duff@adacore.com>

        * ada_get_targ.adb, aspects.ads, checks.adb, cstand.adb,
        einfo.ads, exp_attr.adb, freeze.adb, get_targ.adb,
        libgnat/a-textio.ads, libgnat/g-memdum.ads,
        libgnat/s-scaval__128.adb, libgnat/s-scaval.adb, make.adb,
        osint.ads, par-prag.adb, sem_ch13.adb, sem_prag.adb,
        sem_prag.ads, set_targ.adb, set_targ.ads, snames.ads-tmpl,
        targparm.ads, types.ads: Remove AAMP-specific code.
        * switch.ads: Minor reformatting.
        * gen_il-fields.ads, gen_il-gen.adb,
        gen_il-gen-gen_entities.adb, gen_il-types.ads, einfo-utils.adb,
        einfo-utils.ads: Package Types now contains "type Float_Rep_Kind
        is (IEEE_Binary);", which used to also have an enumeral AAMP.
        Gen_IL can't handle fields of this type, which would be zero
        sized. Therefore, we move the Float_Rep field into Einfo.Utils
        as a synthesized attribute. (We do not delete the field
        altogether, in case we want new floating-point representations
        in the future.)
        * doc/gnat_rm/implementation_defined_pragmas.rst,
        doc/gnat_rm/implementation_defined_aspects.rst,
        doc/gnat_ugn/building_executable_programs_with_gnat.rst,
        doc/gnat_ugn/the_gnat_compilation_model.rst: Remove
        AAMP-specific documentation.
        * gnat_rm.texi, gnat_ugn.texi: Regenerate.

2021-06-18  Gary Dismukes  <dismukes@adacore.com>

        * exp_util.adb (Expand_Sliding_Conversion): Move test of
        Is_Fixed_Lower_Bound_Subtype to an assertion. Exclude string
        literals from sliding expansion.

2021-06-18  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Warn_On_Overlapping_Actuals): Cleanup conditions
        related to Ada_Version.

2021-06-18  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Address_Value): Simplify.

2021-06-18  Bob Duff  <duff@adacore.com>

        * sem_attr.adb (Check_Array_Or_Scalar_Type): Use Expr_Value
        instead of Intval, because the latter only exists in literals.
        Remove Set_Etype on E1; setting the type is done elsewhere.

2021-06-18  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Warn_On_Overlapping_Actuals): Examine types of
        both formal parameters; refactor a complex detection of
        by-reference types.

2021-06-18  Arnaud Charlet  <charlet@adacore.com>

        * gnatcmd.adb: Fix handling of check and test commands.

2021-06-18  Gary Dismukes  <dismukes@adacore.com>

        * doc/gnat_rm/implementation_defined_pragmas.rst: Add
        documentation for the array fixed-lower-bound feature.
        * gnat_rm.texi: Regenerate.

2021-06-18  Bob Duff  <duff@adacore.com>

        * debug.adb: Document switch.
        * exp_aggr.adb: If -gnatd_g was given, then do not bump the
        limit to 500_000.

2021-06-18  Bob Duff  <duff@adacore.com>

        * sem_util.ads, sem_util.adb (Has_Access_Values): Remove
        Include_Internal parameter that was added in previous change.
        * sem_warn.adb (Warnings_Off_E1): Back out E_Out_Parameter ==>
        Formal_Kind change made previously. Check Is_Private_Type to
        avoid warnings on private types. Misc cleanup.
        * sem_attr.adb (Attribute_Has_Access_Values): Remove
        Include_Internal parameter.

2021-06-18  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Warn_On_Overlapping_Actuals): Remove dead branch
        for overlapping actuals in prefix notation.

2021-06-18  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_prag.adb (Process_Import_Or_Interface): Do not
        artificially record a possible modification for a constant.

2021-06-18  Arnaud Charlet  <charlet@adacore.com>

        * exp_ch6.adb (Expand_Call_Helper): Code cleanups.

2021-06-18  Arnaud Charlet  <charlet@adacore.com>

        * exp_aggr.adb, exp_dist.adb, exp_unst.adb, sa_messages.ads,
        sem_ch13.adb, sem_ch3.adb, sem_ch5.adb, sem_eval.adb,
        sem_util.adb, sem_util.ads, sinfo.ads: Update comments.

2021-06-18  Ghjuvan Lacambre  <lacambre@adacore.com>

        * back_end.adb (Scan_Back_End_Switches): Set Opt.JSON_Output to
        True if -fdiagnostics-format=json option is found.
        * back_end.ads (Scan_Compiler_Arguments): Mention
        Opt.JSON_Output.
        * errout.adb (Output_JSON_Message): New procedure.
        (Output_Messages): If Opt.JSON_Output is True, print messages
        with new Output_JSON_Message procedure.
        * opt.ads: Declare JSON_Output variable.
        * doc/gnat_ugn/building_executable_programs_with_gnat.rst:
        Mention new -fdiagnostics-format option.
        * gnat_ugn.texi: Regenerate.

2021-06-18  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch6.adb (Null_Exclusions_Match): Relax null exclusion
        mismatch check when Relaxed_RM_Semantics is set.

2021-06-18  Arnaud Charlet  <charlet@adacore.com>

        * fe.h, opt.adb, opt.ads, par-prag.adb, sem_prag.adb,
        switch-c.adb (Extensions_Allowed): Replace by a function.
        (Ada_Version_Type): Add new value Ada_With_Extensions, to
        replace setting of Extensions_Allowed.  Update setting of
        Extensions_Allowed.

2021-06-18  Arnaud Charlet  <charlet@adacore.com>

        * bindgen.adb (Gen_Output_File_Ada): Generate a new constant
        GNAT_Version_Address.
        * libgnat/g-comver.adb (GNAT_Version_Address): New;
        (GNAT_Version): Use GNAT_Version_Address to disable LTO warning.

2021-06-18  Javier Miranda  <miranda@adacore.com>

        * einfo.ads (Is_Ada_2022_Only): Adding documentation.
        * gen_il-fields.ads (Is_Ada_2022_Only): New flag.
        * gen_il-gen-gen_entities.adb (Is_Ada_2022_Only): New flag.
        * itypes.adb (Create_Null_Excluding_Itype): Inherit
        Is_Ada_2022_Only.
        * sem_ch3.adb (Check_Abstract_Overriding): Skip reporting error
        on Ada 2022 only subprograms that require overriding if we are
        not in Ada 2022 mode.
        (Derive_Subprogram): Inherit Is_Ada_2022_Only.
        * sem_ch6.adb (Check_Overriding_Indicator): Inherit
        Is_Ada_2022_Only.
        (New_Overloaded_Entity): Inherit Is_Ada_2022_Only.
        * sem_ch7.adb (Declare_Inherited_Private_Subprograms): Inherit
        Is_Ada_2022_Only.
        (Preserve_Full_Attributes): Inherit Is_Ada_2022_Only.
        * sem_disp.adb (Find_Hidden_Overridden_Primitive): Inherit
        Is_Ada_2022_Only.
        (Override_Dispatching_Operation): Inherit Is_Ada_2022_Only.
        * sem_prag.adb (Analyze_Pragma): Allow form with argument for
        Ada 2022.
        * sem_type.adb: (Disambiguate): Deal with Is_Ada_2022_Only
        * lib-xref.adb (Generate_Reference): Error on static and
        dispatching calls to Ada 2022 subprograms that require
        overriding if we are not in Ada 2022 mode; warn on other
        references to Ada 2022 entities when not in Ada 2022 mode.
        * sem_ch13.adb (Inherit_Aspects_At_Freeze_Point): Inherit
        Ada_2020_Only.
        * libgnat/a-cdlili.ads (Empty): Adding pragma Ada_2022.
        * libgnat/a-cidlli.ads (Empty): Adding pragma Ada_2022.
        * libgnat/a-ciorma.ads (Empty): Adding pragma Ada_2022.
        * libgnat/a-cobove.ads (Empty): Adding pragma Ada_2022.
        * libgnat/a-coorma.ads (Empty): Adding pragma Ada_2022.
        (New_Vector): Adding pragma Ada_2022.
        (Insert_Vector): Adding pragma Ada_2022.
        (Prepend_Vector): Adding pragma Ada_2022.
        (Append_Vector): Adding pragma Ada_2022.

2021-06-17  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch3.adb (Check_Ops_From_Incomplete_Type): Protect against
        no Primitive_Operations.

2021-06-17  Vadim Godunko  <godunko@adacore.com>

        * libgnat/a-strunb__shared.ads (Allocate): Additional parameter
        to provide additional amount of space to be allocated.
        * libgnat/a-strunb__shared.adb (Aligned_Max_Length): Limit
        length to Natural'Last when requested length is larger than it.
        (Allocate): Merge two slightly different implementations into
        one.

2021-06-17  Gary Dismukes  <dismukes@adacore.com>

        * checks.adb (Discrete_Range_Cond): For an index subtype that
        has a fixed lower bound, require that the range's lower bound
        match that of the subtype.
        (Selected_Range_Checks): Warn about the case where a static
        lower bound does not equal an index subtype's fixed lower bound.
        * einfo.ads (Is_Fixed_Lower_Bound_Array_Subtype,
        Is_Fixed_Lower_Bound_Index_Subtype): Document new entity flag.
        * exp_ch4.adb (Expand_N_Type_Conversion): If the operand is of
        an unconstrained array subtype with fixed lower bound, then
        Expand_Sliding_Conversion is applied to the operand.
        * exp_ch6.adb (Expand_Simple_Function_Return): If the result
        subtype is an unconstrained array subtype with fixed lower
        bound, then Expand_Sliding_Conversion is applied to the return
        object.
        * exp_util.ads (Expand_Sliding_Conversion): New procedure for
        applying a sliding subtype conversion to an array object of a
        fixed-lower-bound subtype when needed.
        * exp_util.adb: Add with_clause for Freeze.
        (Expand_Sliding_Conversion): New procedure for applying a
        sliding subtype conversion to an array object of a
        fixed-lower-bound subtype when needed.  It traverses the indexes
        of the unconstrained array type/subtype to create a target
        constrained subtype and rewrites the array object to be a
        conversion to that subtype, when there's at least one index
        whose lower bound does not statically match the fixed-lower
        bound of the target subtype.
        * gen_il-fields.ads (type Opt_Field_Enum): Add literals
        Is_Fixed_Lower_Bound_Array_Subtype and
        Is_Fixed_Lower_Bound_Index_Subtype for new flags on type
        entities.
        * gen_il-gen-gen_entities.adb: Add calls to
        Create_Semantic_Field for the new fixed-lower-bound flags on
        type entities.
        * par-ch3.adb (P_Array_Type_Definition): Add handling for
        parsing of fixed-lower-bound index ranges in unconstrained array
        types. Report an error if such an index is encountered and GNAT
        language extensions are not enabled.
        (P_Index_Subtype_Def_With_Fixed_Lower_Bound): Support procedure
        for parsing unconstrained index ranges.
        (P_Index_Or_Discriminant_Constraint): Add handling for parsing
        of index constraints that specify ranges with fixed lower
        bounds. Report an error if such an index is encountered and GNAT
        language extensions are not enabled.
        * sem_ch3.adb (Analyze_Object_Declaration): If the object's
        nominal subtype is an array subtype with fixed lower bound, then
        Expand_Sliding_Conversion is applied to the object.
        (Array_Type_Declaration): Mark the array type and the subtypes
        of any indexes that specify a fixed lower bound as being
        fixed-lower-bound subtypes, and set the High_bound of the range
        of such an index to the upper bound of the named subtype.
        (Constrain_Array): For an array subtype with one or more index
        ranges specifying a fixed lower bound, set Is_Constrained to
        False and set the array subtype's
        Is_Fixed_Lower_Bound_Array_Subtype flag to True.
        (Constrain_Index): Mark the subtypes of an index that specifies
        a fixed lower bound as being a fixed-lower-bound index subtype,
        and set the High_bound of the range of such an index to the
        upper bound of the base type of the array type's corresponding
        index.
        * sem_res.adb (Resolve_Actuals): If a formal is of an
        unconstrained array subtype with fixed lower bound, then
        Expand_Sliding_Conversion is applied to the actual.
        * sem_util.adb (Build_Actual_Subtype): If the actual subtype
        corresponds to an unconstrained array subtype having any indexes
        with fixed lower bounds, then set the lower bounds of any such
        indexes of the actual subtype to the appropriate fixed lower
        bound of the formal subtype (rather than taking it from the
        formal itself).
        * sprint.adb (Sprint_Node_Actual, case N_Range): If a range's
        Etype has a fixed lower bound, then print "<>" rather than the
        High_Bound of the range.

2021-06-17  Bob Duff  <duff@adacore.com>

        * sem_util.adb, sem_util.ads (Has_Access_Values): New formal
        Include_Internal to indicate whether internal types should be
        included.
        * sem_warn.adb (Check_References): Change E_Out_Parameter to
        Formal_Kind, to match the comment about Spec_Entity.  Pass
        Include_Internal => False to Has_Access_Values, so that we warn
        on types with access values that happen to be in internal types,
        such as Unbounded_String.
        * sem_attr.adb (Attribute_Has_Access_Values): Pass
        Include_Internal => True to Has_Access_Values, to preserve
        existing behavior.
        * libgnat/g-rewdat.adb (Do_Output): Change B from 'in out' to
        'in', to avoid warning enabled by the change to sem_warn.adb.
        * libgnat/s-objrea.adb (Check_Read_Offset): Change S from 'in
        out' to 'in', to avoid warning enabled by the change to
        sem_warn.adb.

2021-06-17  Steve Baird  <baird@adacore.com>

        * exp_ch5.adb
        (Expand_N_Case_Statement.Expand_General_Case_Statement): New
        subprogram.
        (Expand_N_Case_Statement): If extensions are allowed and the
        case selector is not of a discrete type, then call
        Expand_General_Case_Statement to generate expansion instead of
        flagging the non-discrete selector as an error.
        * sem_case.ads (Is_Case_Choice_Pattern): New Boolean-valued
        function for testing whether a given expression occurs as part
        of a case choice pattern.
        * sem_case.adb (Composite_Case_Ops): New package providing
        support routines for the new form of case statements. This
        includes a nested package, Composite_Case_Ops.Value_Sets, which
        encapsulates the "representative values" implementation of
        composite value sets.
        (Check_Choices.Check_Case_Pattern_Choices): New procedure for
        semantic checking of non-discrete case choices. This includes
        the checks pertaining to coverage and overlapping.
        (Check_Choices.Check_Composite_Case_Selector): New procedure for
        semantic checking of non-discrete case selectors.
        (Check_Choices): If extensions are allowed then a non-discrete
        selector type no longer implies that an error must have been
        flagged earlier.  Instead of simply returning, call
        Check_Composite_Case_Selector and Check_Case_Pattern_Choices.
        (Is_Case_Choice_Pattern): Body of new function declared in
        sem_case.ads .
        * sem_ch5.adb (Analyze_Case_Statement): If extensions are
        allowed, then we can't use RM 5.4's "The selecting_expression is
        expected to be of any discrete type" name resolution rule.
        Handle the case where the type of the selecting expression is
        not discrete, as well as the new ambiguous-name-resolution error
        cases made possible by this change.
        * sem_res.adb (Resolve_Entity_Name): It is ok to treat the name
        of a type or subtype as an expression if it is part of a case
        choice pattern, as in "(Field1 => Positive, Field2 => <>)".
        * exp_aggr.adb (Expand_Record_Aggregate): Do not expand case
        choice aggregates.
        * gen_il-fields.ads: Define two new node attributes,
        Binding_Chars and Multidefined_Bindings.
        * gen_il-gen-gen_nodes.adb: The new Multidefined_Bindings
        attribute is Boolean-valued and may be set on
        N_Case_Statement_Alternative nodes. The new Binding_Chars
        attribute is Name_Id-valued and may be set on
        N_Component_Association nodes.
        * par-ch4.adb (P_Record_Or_Array_Component_Association): When
        parsing a component association, check for both new syntax forms
        used to specify a bound value in a case-choice aggregate.  In
        the case of a box value, an identifier may occur within the box,
        as in "Foo => <Abc>" instead of "Foo => <>". In the more general
        case, an expression (or a box) may be followed by "is
        <identifier>", as in
        "Foo => Bar is Abc" instead of just "Foo => Bar".
        * sem_aggr.adb (Resolve_Record_Aggregate): Do not transform box
        component values in a case-choice aggregate.
        * sinfo.ads: Provide comments for the new attributes added in
        gen_il-fields.ads.
        * doc/gnat_rm/implementation_defined_pragmas.rst: Describe this
        new feature in documentation for pragma Extensions_Allowed.
        * gnat_rm.texi: Regenerate.

2021-06-17  Arnaud Charlet  <charlet@adacore.com>

        * exp_ch4.adb (Expand_N_Expression_With_Actions.Process_Action):
        Do not abandon processing on a nested N_Expression_With_Actions
        or N_Loop_Statement, otherwise we may miss some transient
        declarations.

2021-06-17  Arnaud Charlet  <charlet@adacore.com>

        * exp_util.adb (Find_Hook_Context): Do not stop on an aggregate
        node.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Is_Valid_Renaming): Check not only indexed
        components, but slices too.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch3.adb (Analyze_Private_Extension_Declaration): Check
        No_Wide_Characters restriction after rejecting illegal parent
        types.
        (Derived_Type_Declaration): Likewise.
        (Find_Type_Of_Subtype_Indic): Remove check for
        No_Wide_Characters restriction, which was done too early.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Is_Valid_Renaming): Body moved from its nested
        routine.

2021-06-17  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch12.adb (Instantiate_Type): If the actual type for an
        incomplete formal type is also incomplete, but has a Full_View,
        use the Full_View of the actual type rather than the incomplete
        view.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * doc/gnat_ugn/building_executable_programs_with_gnat.rst
        (-gnatw.I): Remove double period at the end of sentence.
        * gnat_ugn.texi: Regenerate.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Denotes_Same_Object): Call Get_Index_Bounds with
        the range of a slice object, not its type.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Warn_On_Overlapping_Actuals): Fix style;
        refactor repeated calls to Nkind; remove early RETURN.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Warn_On_Overlapping_Actuals): Ignore formal of
        generic types, but keep examining other parameters.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Warn_On_Overlapping_Actuals): Remove dead code.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_warn.adb (Warn_On_Overlapping_Actuals): Remove repeated
        code.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * checks.adb (Overlap_Check): Replace Set_Casing with
        Adjust_Name_Case and adapt surrounding code as needed.

2021-06-17  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/s-putaim.ads, libgnat/s-putaim.adb: Move...
        * libgnarl/s-putaim.ads, libgnarl/s-putaim.adb: ... here.

2021-06-17  Arnaud Charlet  <charlet@adacore.com>

        * uintp.ads, uintp.adb (UI_To_Unsigned_64): New.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Get_Overflow_Mode): Reword error message.
        * switch-c.adb (Get_Overflow_Mode): Likewise.

2021-06-17  Richard Kenner  <kenner@adacore.com>

        * exp_util.adb (Expand_Static_Predicates_In_Choices): Handle
        Others_Discrete_Choices in N_Others_Choice.

2021-06-17  Arnaud Charlet  <charlet@adacore.com>

        * atree.adb: Remove redundant comment with spec.
        * sem_warn.adb: Fix typo in comment.

2021-06-17  Arnaud Charlet  <charlet@adacore.com>

        * atree.adb: Do not suppress checks.

2021-06-17  Justin Squirek  <squirek@adacore.com>

        * exp_ch3.adb (Check_Missing_Others): Add comment.
        (Build_Initialization_Call): Remove inaccurate accessibility
        comment.
        * sem_ch12.adb (Analyze_Generic_Subprogram_Declaration): Remove
        test for Ada2012.
        (Analyze_Package_Instantiation): Remove speculative comment.
        (Inline_Instance_Body): Add comments for loops.
        (Build_Subprogram_Renaming): Remove comment about fix being
        partial and "ugly."
        (Instantiate_Subprogram_Body): Remove comment referencing DEC
        related internal issue.
        (Subtypes_Match): Add comment and simplify anonymous access
        test.
        (Is_Global): Add test for when E is an expanded name, and
        calculate the scope accordingly.
        * sem_ch6.adb (Analyze_Function_Return): Update comment
        regarding accessibility, and add check for
        Warn_On_Ada_2012_Compatibility.
        (Mask_Type_Refs): Add comments.
        (Analyze_Subprogram_Declaration): Remove mysterious suppression
        of elaboration checks.
        * sem_ch7.adb (Preserve_Full_Attributes): Preserve Is_Atomic
        value.
        * sem_ch8.adb (Most_Descendant_Use_Clause): Remove comment.
        (Note_Redundant_Use): Fix calls to Find_First_Use to be
        Find_Most_Prev.
        (Get_Object_Name): Modify error message to be more descriptive.
        (Known_But_Visible): Remove mysterious special case for
        GNAT_Mode.
        (Find_First_Use): Removed.
        (Find_Most_Prev): Renamed from Find_First_Use.
        * sem_prag.adb (Check_Static_Constraint): Add comments to
        routine.

2021-06-17  Bob Duff  <duff@adacore.com>

        * treepr.adb (Print_Node): Display the Entity or Associated_Node
        fields if appropriate.
        * sinfo-utils.ads (F_Associated_Node, F_Entity): Remove. These
        are no longer needed.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * checks.adb (Apply_Parameter_Aliasing_Checks): Replace calls to
        Is_Object_Reference with calls to Is_Name_Reference; remove
        asymmetric condition that only detected an aggregate as the
        first actual (aggregate objects were just a special case of an
        object reference that was not a name).

2021-06-17  Bob Duff  <duff@adacore.com>

        * gen_il-gen.adb, gen_il-internals.ads: Generate field
        enumeration literals with "F_" prefix.  Update all generated
        references accordingly.
        * atree.adb, einfo-utils.adb, sem_ch3.adb, sem_ch5.adb,
        sem_ch6.adb, sem_ch8.adb, sinfo-cn.adb, sinfo-utils.adb,
        sinfo-utils.ads, treepr.adb: Add "F_" prefix to all uses of the
        field enumeration literals.

2021-06-17  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/i-c.ads, libgnat/i-cexten.ads,
        libgnat/i-cexten__128.ads: bool renamed C_bool.

2021-06-17  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch4.adb (Analyze_Allocator): Reject allocators in
        restricted contexts.

2021-06-17  Arnaud Charlet  <charlet@adacore.com>

        * gcc-interface/Make-lang.in: Use libgnat.so if libgnat.a cannot
        be found.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Is_Volatile_Function): Follow the exact wording
        of SPARK (regarding volatile functions) and Ada (regarding
        protected functions).

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.adb (Is_OK_Volatile_Context): All references to
        volatile objects are legal in preanalysis.
        (Within_Volatile_Function): Previously it was wrongly called on
        Empty entities; now it is only called on E_Return_Statement,
        which allow the body to be greatly simplified.

2021-06-16  Yannick Moy  <moy@adacore.com>

        * sem_res.adb (Set_Slice_Subtype): Revert special-case
        introduced previously, which is not needed as Itypes created for
        slices are precisely always used.

2021-06-16  Eric Botcazou  <ebotcazou@adacore.com>

        * urealp.adb (Scale): Change first paramter to Uint and adjust.
        (Equivalent_Decimal_Exponent): Pass U.Den directly to Scale.
        * libgnat/s-exponr.adb (Negative): Rename to...
        (Safe_Negative): ...this and change its lower bound.
        (Exponr): Adjust to above renaming and deal with Integer'First.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Flag_Effectively_Volatile_Objects): Detect also
        allocators within restricted contexts and not just entity names.
        (Resolve_Actuals): Remove duplicated code for detecting
        restricted contexts; it is now exclusively done in
        Is_OK_Volatile_Context.
        (Resolve_Entity_Name): Adapt to new parameter of
        Is_OK_Volatile_Context.
        * sem_util.ads, sem_util.adb (Is_OK_Volatile_Context): Adapt to
        handle contexts both inside and outside of subprogram call
        actual parameters.
        (Within_Subprogram_Call): Remove; now handled by
        Is_OK_Volatile_Context itself and its parameter.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * sinput.adb (Sloc_Range): Refactor several repeated calls to
        Sloc and two comparisons with No_Location.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * checks.adb (Apply_Scalar_Range_Check): Fix handling of check depending
        on the parameter passing mechanism.  Grammar adjustment ("has"
        => "have").
        (Parameter_Passing_Mechanism_Specified): Add a hyphen in a comment.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Build_Slice_Assignment): Remove unused
        initialization.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * restrict.adb, sem_attr.adb, types.ads: Fix typos in
        "occuring"; refill comment as necessary.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.ads (Is_Actual_Parameter): Update comment.
        * sem_util.adb (Is_Actual_Parameter): Also detect entry parameters.

2021-06-16  Arnaud Charlet  <charlet@adacore.com>

        * rtsfind.ads, libgnarl/s-taskin.ads, exp_ch3.adb, exp_ch4.adb,
        exp_ch6.adb, exp_ch9.adb, sem_ch6.adb: Move master related
        entities to the expander directly.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Is_Assignment_Or_Object_Expression): Whitespace
        cleanup.
        (Is_Attribute_Expression): Prevent AST climbing from going to
        the root of the compilation unit.

2021-06-16  Steve Baird  <baird@adacore.com>

        * doc/gnat_rm/implementation_advice.rst: Add a section for RM
        A.18 .
        * gnat_rm.texi: Regenerate.

2021-06-16  Justin Squirek  <squirek@adacore.com>

        * sem_ch13.adb (Analyze_Enumeration_Representation_Clause): Add
        check for the mixing of entries.

2021-06-16  Justin Squirek  <squirek@adacore.com>

        * sem_ch13.adb (Make_Aitem_Pragma): Check for static expressions
        in Priority aspect arguments for restriction Static_Priorities.

2021-06-16  Justin Squirek  <squirek@adacore.com>

        * sem_util.adb (Accessibility_Level): Take into account
        renamings of loop parameters.

2021-06-16  Matthieu Eyraud  <eyraud@adacore.com>

        * par_sco.adb (Set_Statement_Entry): Change sloc for dominance
        marker.
        (Traverse_One): Fix typo.
        (Output_Header): Fix comment.

2021-06-16  Richard Kenner  <kenner@adacore.com>

        * exp_unst.adb (Register_Subprogram): Don't look for aliases for
        subprograms that are generic.  Reorder tests for efficiency.

2021-06-16  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_util.adb (Incomplete_Or_Partial_View): Retrieve the scope of
        the parameter and use it to find its incomplete view, if any.

2021-06-16  Eric Botcazou  <ebotcazou@adacore.com>

        * freeze.adb (Check_No_Parts_Violations): Return earlier if the
        type is elementary or does not come from source.

2021-06-16  Bob Duff  <duff@adacore.com>

        * ghost.adb: Add another special case where full analysis is
        needed. This bug is due to quirks in the way
        Mark_And_Set_Ghost_Assignment works (it happens very early,
        before name resolution is done).

2021-06-16  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_util.adb (Current_Entity_In_Scope): Reimplement.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch8.adb (End_Scope): Remove extra parens.

2021-06-16  Javier Miranda  <miranda@adacore.com>

        * exp_disp.adb (Build_Class_Wide_Check): Ensure that evaluation
        of actuals is side effects free (since the check duplicates
        actuals).

2021-06-16  Ed Schonberg  <schonberg@adacore.com>

        * sem_res.adb (Resolve_Raise_Expression): Apply Ada_2020 rules
        concerning the need for parentheses around Raise_Expressions in
        various contexts.

2021-06-16  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch13.adb (Validate_Unchecked_Conversion): Move detection
        of generic types before switching to their private views; fix
        style in using AND THEN.

2021-06-16  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch3.adb (Analyze_Component_Declaration): Do not special
        case raise expressions.

2021-06-16  Sergey Rybin  <rybin@adacore.com>

        * doc/gnat_ugn/building_executable_programs_with_gnat.rst:
        Instead of referring to the formatting of the Ada examples in
        Ada RM add use the list of checks that are actually performed.
        * gnat_ugn.texi: Regenerate.

2021-06-16  Eric Botcazou  <ebotcazou@adacore.com>

        * initialize.c: Do not include vxWorks.h and fcntl.h from here.
        (__gnat_initialize) [__MINGW32__]: Remove #ifdef and attribute
        (__gnat_initialize) [init_float]: Delete.
        (__gnat_initialize) [VxWorks]: Likewise.
        (__gnat_initialize) [PA-RISC HP-UX 10]: Likewise.
        * runtime.h: Add comment about vxWorks.h include.

2021-06-16  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-except.ads (ZCX_By_Default): Delete.
        (Require_Body): Likewise.
        * libgnat/s-except.adb: Replace body with pragma No_Body.

2021-06-15  Steve Baird  <baird@adacore.com>

        * exp_util.adb (Kill_Dead_Code): Generalize the existing
        handling of if statements to handle case statements similarly.

2021-06-15  Eric Botcazou  <ebotcazou@adacore.com>

        * raise.h (_gnat_builtin_longjmp): Delete.
        (set_gnat_exit_status): Likewise.

2021-06-15  Piotr Trojanek  <trojanek@adacore.com>

        * exp_util.adb (Possible_Side_Effect_In_SPARK): Handle component
        declaration just like full type and subtype declarations.

2021-06-15  Yannick Moy  <moy@adacore.com>

        * errout.adb (First_And_Last_Node): Also apply to arbitrary late
        declarations, not only subprogram specs.

2021-06-15  Bob Duff  <duff@adacore.com>

        * sem_ch3.adb (Make_Class_Wide_Type): Make sure all the calls to
        Reinit_Field_To_Zero are for the correct Ekinds.

2021-06-15  Bob Duff  <duff@adacore.com>

        * aspects.ads (No_Task_Parts): New aspect.
        * snames.ads-tmpl: Add the aspect name.
        * exp_ch6.adb (Might_Have_Tasks): Return False if this is a
        class-wide type whose specific type has No_Task_Parts.
        * freeze.adb (Check_No_Parts_Violations): This is an adaptation
        of the procedure formerly known as
        Check_No_Controlled_Parts_Violations, which now supports both
        No_Controlled_Parts and No_Task_Parts.  It takes a parameter
        indicating which aspect is being checked.
        (Freeze_Entity): Call Check_No_Parts_Violations for both
        aspects.
        * sem_ch13.adb (Analyze_Aspect_Specifications): The code for
        Aspect_No_Controlled_Parts already works as is with
        Aspect_No_Task_Parts.
        * libgnat/a-iteint.ads: Add No_Task_Parts aspect to the two
        iterator iterfaces.
        * doc/gnat_rm/implementation_defined_aspects.rst: Add
        documentation for the No_Task_Parts aspect.
        * gnat_rm.texi: Regenerate.

2021-06-15  Arnaud Charlet  <charlet@adacore.com>

        * exp_unst.adb (Unnest_Subprogram.Build_Table.Visit_Node): Fix
        handling of scopes for subprogram calls.

2021-06-15  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb: Fix typos in comments related to access types.
        * sem_util.adb (Is_Access_Variable): Stronger condition.

2021-06-15  Arnaud Charlet  <charlet@adacore.com>

        * Make-generated.in: Add rule to copy runtime files needed
        during stage1.
        * raise.c: Remove obsolete symbols used during bootstrap.
        * gcc-interface/Make-lang.in: Do not use libgnat sources during
        stage1.
        (GNAT_ADA_OBJS, GNATBIND_OBJS): Split in two parts, the common
        part and the part only used outside of stage1.
        (ADA_GENERATED_FILES): Add runtime files needed during bootstrap
        when recent APIs are needed.
        (ada/b_gnatb.adb): Remove prerequisite.
        * gcc-interface/system.ads: Remove obsolete entries.

2021-06-15  Eric Botcazou  <ebotcazou@adacore.com>

        * raise-gcc.c (__gnat_personality_seh0): Use PERSONALITY_FUNCTION.

2021-06-15  Ed Schonberg  <schonberg@adacore.com>

        * sem_util.adb (Is_Confirming): Separate the handling of
        Implicit_Dereference, for which no pragma is generated but which
        is already checked for legality in Sem_Ch13, including renamed
        discriminants in a derived type.
        (Is_Confirming, Same_Name): For expanded names, only check
        matching of selector, because prefix may correspond to original
        and derived types with different names and/or scopes. Semantic
        checks on aspect expression have already verified its legality.
        Add comments regarding possible gaps in RM description of the
        feature.

2021-06-15  Gary Dismukes  <dismukes@adacore.com>

        * freeze.adb (Freeze_Subprogram): Don't propagate conventions
        Intrinsic or Entry to anonymous access-to-subprogram types
        associated with subprograms having those conventions. Update
        related comment.
        * sem_attr.adb (Resolve_Attribute, Attribute_*Access): Remove
        special-case warning code for cases where a called subprogram
        has convention Intrinsic as well as its formal's type (the
        expected type for the Access attribute), since this case can no
        longer occur.

2021-06-15  Piotr Trojanek  <trojanek@adacore.com>

        * exp_imgv.adb (Expand_User_Defined_Enumeration_Image): Fix
        typos.

2021-06-15  Bob Duff  <duff@adacore.com>

        * einfo-utils.adb (Known_Component_Size,
        Known_Static_Component_Size, Unknown_Component_Size): Use
        Implementation_Base_Type instead of Base_Type.

2021-06-15  Bob Duff  <duff@adacore.com>

        * gen_il-gen-gen_entities.adb (E_Loop_Parameter): Add
        Interface_Name field.

2021-06-15  Bob Duff  <duff@adacore.com>

        * sem_cat.adb (Check_Non_Static_Default_Expr): Allow nonstatic
        expression in predefined unit with pragma Preelaborate.

2021-06-15  Yannick Moy  <moy@adacore.com>

        * doc/gnat_rm/intrinsic_subprograms.rst: More details on shift
        operations for signed types. Also add the missing Import and
        Convention on the example.
        * gnat_rm.texi: Regenerate.

2021-06-15  Eric Botcazou  <ebotcazou@adacore.com>

        * raise-gcc.c: Include <cstdarg> instead of <stdarg.h> in C++.
        Include <stdbool.h> and unconditionally <stdlib.h> in C.

2021-06-15  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.ads (Find_Overlaid_Entity): Simplify comment for
        spec.
        * sem_util.adb (Find_Overlaid_Entity): Remove defensive code
        from body.

2021-06-15  Eric Botcazou  <ebotcazou@adacore.com>

        * argv.c: Add include of <stdlib.h> for the runtime.
        (gnat_argv): Change type to char ** and initialize to NULL.
        (gnat_envp): Likewise.
        * argv-lynxos178-raven-cert.c: Add include of <stdlib.h>.
        (gnat_argv): Change type to char ** and initialize to NULL.
        (gnat_envp): Likewise.

2021-06-15  Bob Duff  <duff@adacore.com>

        * gen_il-gen.adb (Setter_Needs_Parent): Add missing
        Then_Actions.  Fix self-contradictory comment.
        * exp_util.adb (Insert_Actions): Minor comment improvments.

2021-06-15  Arnaud Charlet  <charlet@adacore.com>

        * sem_eval.adb (Eval_Logical_Op, Test_Expression_Is_Foldable):
        Add support for folding more "and"/"or" expressions.
        * exp_util.adb (Side_Effect_Free): Fix handling of membership
        tests.

2021-06-15  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Resolve_Actual): Replace repeated calls to
        "Etype (F)" with references to "F_Typ", which keeps the results
        of exactly that call.

2021-06-15  Bob Duff  <duff@adacore.com>

        * gen_il-gen.adb (To_Bit_Offset): Use 'Base to avoid overflow in
        computations in Last_Bit when Offset = 'Last.
        (Choose_Offset): Give a better error message when we run out of
        fields.  In particular, point out that
        Gen_IL.Internals.Bit_Offset'Last needs to be increased.

2021-06-15  Bob Duff  <duff@adacore.com>

        * atree.ads, einfo-utils.ads, einfo-utils.adb, fe.h, gen_il.adb,
        gen_il.ads, gen_il-gen-gen_entities.adb,
        gen_il-gen-gen_nodes.adb, sem_ch12.adb, sem_ch3.adb,
        sem_util.adb, sinfo-utils.ads, treepr.adb, types.ads: Clean up
        ??? comments and other comments.
        * atree.adb: Clean up ??? comments and other comments.
        (Validate_Node): Fix bug: "Off_0 (N) < Off_L (N)"
        should be "Off_0 (N) <= Off_L (N)".
        * gen_il-gen.adb, gen_il-gen.ads: Clean up ???
        comments and other comments.  Add support for getter-specific
        and setter-specific preconditions.  Detect the error of putting
        a field in the wrong subrange.  Misc cleanup.
        (Node_Field vs. Entity_Field): Clean up Nmake.  Improve
        comments.
        * gen_il-utils.ads: Misc cleanup. Move...
        * gen_il-internals.ads: ... here.
        * gen_il-utils.adb: Misc cleanup. Move...
        * gen_il-internals.adb: ... here.
        * gen_il-fields.ads: Move Was_Default_Init_Box_Association,
        which was in the wrong subrange.  Add comments.  Misc cleanup.
        * gen_il-types.ads: Add Named_Access_Kind.
        * sinfo-cn.adb: Clean up ??? comments and other comments.
        Remove redundant assertions.
        * einfo.ads, sinfo.ads: Clean up ??? comments and other
        comments.  Remove all the comments indicating field offsets.
        These are obsolete now that Gen_IL computes the offsets
        automatically.

2021-06-15  Arnaud Charlet  <charlet@adacore.com>

        * einfo.ads, errout.adb, errout.ads, exp_aggr.adb, exp_ch5.adb,
        exp_ch6.adb, exp_ch8.adb, exp_ch9.adb, exp_imgv.adb,
        exp_put_image.adb, fe.h, impunit.adb, impunit.ads,
        libgnat/a-cobove.ads, libgnat/a-convec.ads, opt.ads,
        par-ch12.adb, par-ch3.adb, par-ch4.adb, par-ch5.adb,
        par-ch6.adb, par-prag.adb, par-util.adb, scans.ads, scng.adb,
        sem_aggr.adb, sem_attr.adb, sem_ch10.adb, sem_ch12.adb,
        sem_ch13.adb, sem_ch3.adb, sem_ch5.adb, sem_ch6.adb,
        sem_ch8.adb, sem_elab.adb, sem_eval.adb, sem_prag.adb,
        sem_res.adb, sem_type.adb, sem_util.adb, sem_util.ads,
        sinfo.ads, snames.ads-tmpl, sprint.adb, switch-c.adb, usage.adb,
        doc/gnat_ugn/building_executable_programs_with_gnat.rst,
        doc/gnat_rm/implementation_defined_aspects.rst,
        gcc-interface/trans.c: Update all references to Ada 2020 to Ada
        2022. Rename pragma Ada_2020 to Ada_2022.  Update documentation
        accordingly.
        * gnat_ugn.texi, gnat_rm.texi: Regenerate.

2021-06-15  Steve Baird  <baird@adacore.com>

        * sem_util.adb (Gather_Components): Factor the test that was
        already being used to govern emitting a pre-Ada_2020 error
        message into an expression function,
        OK_Scope_For_Discrim_Value_Error_Messages. Call that new
        function in two places: the point where the same test was being
        performed previously, and in governing emission of a newer
        Ada_2020 error message. In both cases, the out-mode parameter
        Gather_Components.Report_Errors is set to True even if no error
        messages are generated within Gather_Components.
        * sem_util.ads: Correct a comment.

2021-06-15  Richard Kenner  <kenner@adacore.com>

        * sem_ch3.adb (Array_Type_Declaration, Build_Derived_Type):
        Reinitialize Stored_Constraint when needed.
        (Set_Modular_Size): Likewise.
        * atree.adb: (Check_Vanishing_Fields): Add node id to debugging
        information.

2021-06-15  Bob Duff  <duff@adacore.com>

        * sem_util.adb (Propagate_Invariant_Attributes): Call
        Set_Has_Own_Invariants on the base type, because these are
        Base_Type_Only. The problem is that the base type of a type is
        indeed a base type when Set_Base_Type is called, but then the
        type is mutated into a subtype in rare cases.
        * atree.ads, atree.adb (Is_Entity): Export. Correct subtype of
        parameter in body.
        * gen_il-gen.adb: Improve getters so that "Pre => ..." can refer
        to the value of the field. Put Warnings (Off) on some with
        clauses that are not currently used, but might be used by such
        Pre's.

2021-06-15  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch3.adb (Access_Type_Declaration): Add comments to explain
        the ordering of Mutate_Kind and Set_Directly_Designated_Type;
        remove temporary setting of Ekind to E_Access_Type for building
        _master objects, since now the Ekind is already set to its final
        value. Move repeated code into Setup_Access_Type routine and use
        it so that Process_Subtype is executed before mutating the kind
        of the type entity.
        * gen_il-gen-gen_entities.adb (Gen_Entities): Remove
        Directly_Designated_Type from E_Void, E_Private_Record,
        E_Limited_Private_Type and Incomplete_Kind; now it only belongs
        to Access_Kind entities.
        * sem_util.adb: Minor reformatting.

2021-06-03  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <E_Array_Type>: Add PAT
        local constant and use it throughout.  If it is set, use a ref-all
        pointer type for the pointer-to-array field of the fat pointer type.
        <E_Array_Subtype>: Add PAT local constant and use it throughout.

2021-05-26  Jakub Jelinek  <jakub@redhat.com>

        * init.c (__gnat_error_handler): Remove register keyword.

2021-05-25  Martin Liska  <mliska@suse.cz>

        * doc/share/conf.py: Fix Sphinx 4.0.x error.

2021-05-21  Piotr Trojanek  <trojanek@adacore.com>

        * gcc-interface/trans.c (Raise_Error_to_gnu): Add an assertion.

2021-05-21  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/utils.c (gnat_pushdecl): Fix typo in comment.
        * gcc-interface/utils2.c (build_simple_component_ref): Build NULL_EXPR
        if the offset of the field has overflowed.
        (build_component_ref): Add gigi checking assertion that the reference
        has been built and replace the discriminant check by a Program_Error.

2021-05-21  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <E_Named_Integer>: Do
        not pass default value in call to create_var_decl.
        <E_Variable>: Likewise.
        <E_Record_Subtype>: Both pass true for const_flag and false for
        const_decl_allowed_p in call to create_var_decl.
        Small tweaks in the generic record type case.
        (elaborate_expression): Rename need_debug into need_for_debug and
        adjust throughout.
        (elaborate_expression_1): Likewise.  Pass Needs_Debug_Info instead
        of need_for_debug in call to create_var_decl.
        (elaborate_expression_2): Likewise.
        * gcc-interface/utils.c (maybe_pad_type): Pass false for
        const_decl_allowed_p in call to create_var_decl.

2021-05-21  Ghjuvan Lacambre  <lacambre@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity): Replace ? with ??.
        (gnat_to_gnu_param): Likewise.
        (gnat_to_gnu_subprog_type): Likewise.
        (warn_on_field_placement): Likewise.
        (intrin_arglists_compatible_p): Likewise.
        * gcc-interface/trans.c (Pragma_to_gnu): Likewise.
        (gnat_to_gnu): Likewise.
        (validate_unchecked_conversion): Likewise.
        * gcc-interface/utils.c (maybe_pad_type): Likewise.

2021-05-21  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <E_Array_Type>: Process
        the implementation type of a packed type implemented specially.

2021-05-21  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_subprog_type): Always translate
        the Is_Pure flag into the "pure" attribute of GNU C.

2021-05-21  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (Call_to_gnu): Restrict previous change
        to bitfields whose size is not equal to the type size.
        (gnat_to_gnu): Likewise.

2021-05-21  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (Call_to_gnu): Minor tweaks.
        (gnat_to_gnu_external): Likewise.
        (Raise_Error_to_gnu): Return an empty statement list if there is a
        condition and it is always false.
        (gnat_to_gnu): Do not check for elaboration code a priori during the
        translation but a posteriori instead.

2021-05-21  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (gnat_to_gnu) <N_Simple_Return_Statement>:
        Put a SLOC on the assignment from the return value to the return
        object in the copy-in/copy-out case.

2021-05-21  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <E_Variable>: Replace
        CEIL_DIV_EXPR with EXACT_DIV_EXPR.
        * gcc-interface/misc.c (gnat_type_max_size): Likewise.
        * gcc-interface/utils.c (maybe_pad_type): Likewise.
        (finish_record_type): Likewise.  And always compute the unit size.

2021-05-14  Martin Liska  <mliska@suse.cz>

        * doc/Makefile: Add gnat-style target.
        * doc/share/conf.py: Likewise.
        * doc/gnat-style.rst: New file.

2021-05-12  Bob Duff  <duff@adacore.com>

        PR ada/100564
        * atree.adb (Change_Node): Do not call Zero_Slots on a Node_Id
        when the Nkind has not yet been set; call the other Zero_Slots
        that takes a range of slot offsets.  Call the new Mutate_Kind
        that takes an Old_Size, for the same reason -- the size cannot
        be computed without the Nkind.
        (Mutate_Nkind): New function that allows specifying the Old_Size.
        (Size_In_Slots): Assert that the Nkind has proper (nonzero) value.
        * atree.ads: Minor reformatting.

2021-05-12  Martin Liska  <mliska@suse.cz>

        * doc/share/conf.py: Do not use binary mode.
        Do not use u' literals as Python3 uses unicode by default.

2021-05-11  Martin Liska  <mliska@suse.cz>

        * gcc-interface/ada-tree.h (BUILT_IN_LIKELY): Use builtins
        from COROUTINES.
        (BUILT_IN_UNLIKELY): Likewise.

2021-05-11  Eric Botcazou  <ebotcazou@adacore.com>

        * gnatvsn.adb (Version_String): Rename to...
        (C_Version_String): ...this.
        (Gnat_Version_String): Adjust to above renaming.
        * version.c : Fix formatting glitches.

2021-05-10  Martin Liska  <mliska@suse.cz>

        PR bootstrap/100506
        * Make-generated.in: Replace version.c with ada/version.c.
        * gcc-interface/Make-lang.in: Add version.o to GNAT1_C_OBJS and
        GNATBIND_OBJS.
        * gcc-interface/Makefile.in: Replace version.c with ada/version.c.
        Add version.o to TOOLS_LIBS.
        * gnatvsn.adb: Replace version_string with gnat_version_string.
        * version.c: New file.

2021-05-10  Eric Botcazou  <ebotcazou@adacore.com>

        * einfo-utils.ads (Classification Attributes): Add pragma Inline.
        (Synthesized Attribute Functions): Move pragma Inline around.
        (Type Representation Attribute Predicates): Likewise.
        (Field Initialization Routines): Likewise.
        (Miscellaneous Subprogram): Likewise.

2021-05-10  Eric Botcazou  <ebotcazou@adacore.com>

        * atree.ads (Slot): Remove pragma Provide_Shift_Operators.
        (Shift_Left): New intrinsic function.
        (Shift_Right): Likewise.
        * atree.adb (Get_1_Bit_Val): Use Natural instead of Integer.
        (Get_2_Bit_Val): Likewise.
        (Get_4_Bit_Val): Likewise.
        (Get_8_Bit_Val): Likewise.
        (Set_1_Bit_Val): Likewise.
        (Set_2_Bit_Val): Likewise.
        (Set_4_Bit_Val): Likewise.
        (Set_8_Bit_Val): Likewise.

2021-05-10  Eric Botcazou  <ebotcazou@adacore.com>

        * atree.adb (Zero_Slots): Remove obsolete comment and add header.

2021-05-10  Eric Botcazou  <ebotcazou@adacore.com>

        * atree.h (Get_32_Bit_Field): Tidy up.
        (Get_32_Bit_Field_With_Default): Likewise.

2021-05-10  Eric Botcazou  <ebotcazou@adacore.com>

        * Make-generated.in (do_gen_il): Replace with...
        (ada/stamp-gen_il): ...this.  Do not copy files into generated/.

2021-05-10  Martin Liska  <mliska@suse.cz>

        * gcc-interface/utils.c (def_builtin_1): Use startswith
        function instead of strncmp.

2021-05-07  Piotr Trojanek  <trojanek@adacore.com>

        * einfo-utils.adb (Is_Access_Object_Type): Use
        Directly_Designated_Type.
        (Is_Access_Subprogram_Type): Use Directly_Designated_Type.
        (Set_Convention): Use plain Ekind.
        * gen_il-gen-gen_entities.adb (Type_Kind): Use plain Ekind.
        * sem_ch3.adb (Access_Type_Declaration): When seeing an illegal
        completion with an access type don't attempt to decorate the
        completion entity; previously the entity had its Ekind set to
        E_General_Access_Type or E_Access_Type, but its Designated_Type
        was empty, which caused a crash in freezing. (Actually, the
        error recovery in the surrounding context is still incomplete,
        e.g. we will crash when the illegal completion is an access to
        an unknown identifier).

2021-05-07  Bob Duff  <duff@adacore.com>

        * par_sco.adb: Align with/use clauses.
        (Traverse_Declarations_Or_Statements): Minor comment fix.
        * aspects.adb, atree.adb, atree.ads, checks.adb, comperr.adb,
        contracts.adb, cstand.adb, debug_a.adb, einfo-utils.adb,
        errout.adb, eval_fat.adb, exp_aggr.adb, expander.adb,
        exp_atag.adb, exp_attr.adb, exp_cg.adb, exp_ch11.adb,
        exp_ch12.adb, exp_ch13.adb, exp_ch2.adb, exp_ch3.adb,
        exp_ch4.adb, exp_ch5.adb, exp_ch6.adb, exp_ch7.adb, exp_ch8.adb,
        exp_ch9.adb, exp_code.adb, exp_dbug.adb, exp_disp.adb,
        exp_dist.adb, exp_fixd.adb, exp_imgv.adb, exp_intr.adb,
        exp_pakd.adb, exp_prag.adb, exp_put_image.adb, exp_sel.adb,
        exp_smem.adb, exp_spark.adb, exp_strm.adb, exp_tss.adb,
        exp_unst.adb, exp_util.adb, exp_util.ads, freeze.adb,
        frontend.adb, ghost.adb, gnat1drv.adb, gnat_cuda.adb,
        impunit.adb, inline.adb, itypes.adb, itypes.ads, layout.adb,
        lib.adb, lib-load.adb, lib-writ.adb, lib-xref.adb,
        lib-xref-spark_specific.adb, live.adb, nlists.adb, par.adb,
        par-ch11.adb, par-ch3.adb, par-ch5.adb, par-ch6.adb, pprint.adb,
        repinfo.adb, restrict.adb, rtsfind.adb, scil_ll.adb, scn.adb,
        sem.adb, sem_aggr.adb, sem_attr.adb, sem_aux.adb, sem_case.adb,
        sem_cat.adb, sem_ch10.adb, sem_ch11.adb, sem_ch12.adb,
        sem_ch13.adb, sem_ch2.adb, sem_ch3.adb, sem_ch4.adb,
        sem_ch5.adb, sem_ch6.adb, sem_ch7.adb, sem_ch8.adb, sem_ch9.adb,
        sem_dim.adb, sem_disp.adb, sem_dist.adb, sem_elab.adb,
        sem_elim.adb, sem_eval.adb, sem_intr.adb, sem_mech.adb,
        sem_prag.adb, sem_res.adb, sem_scil.adb, sem_smem.adb,
        sem_type.adb, sem_util.adb, sem_util.ads, sem_warn.adb,
        sinfo-cn.adb, sinfo-utils.ads, sinput.adb, sinput-l.adb,
        sprint.adb, style.adb, styleg.adb, tbuild.adb, tbuild.ads,
        treepr.adb, uname.adb: Align with/use clauses.

2021-05-07  Bob Duff  <duff@adacore.com>

        * atree.ads, atree.adb, gen_il-gen.ads: Fix comments and clean
        up ???  marks.  Rename Set_Ekind to be Mutate_Ekind.
        * einfo.ads, sinfo.ads: Likewise.  Change "definitive
        definition" to "official definition", because the former sounds
        redundant.  Rename Set_Ekind to be Mutate_Ekind.
        * checks.adb, contracts.adb, cstand.adb, exp_aggr.adb,
        exp_attr.adb, exp_ch11.adb, exp_ch3.adb, exp_ch5.adb,
        exp_ch6.adb, exp_ch7.adb, exp_ch9.adb, exp_disp.adb,
        exp_dist.adb, exp_imgv.adb, exp_intr.adb, exp_prag.adb,
        exp_unst.adb, exp_util.adb, gen_il-gen.adb, inline.adb,
        lib-writ.adb, lib-xref-spark_specific.adb, sem_aggr.adb,
        sem_ch10.adb, sem_ch11.adb, sem_ch12.adb, sem_ch13.adb,
        sem_ch3.adb, sem_ch5.adb, sem_ch6.adb, sem_ch7.adb, sem_ch8.adb,
        sem_ch9.adb, sem_dist.adb, sem_elab.adb, sem_prag.adb,
        sem_util.adb: Rename Set_Ekind to be Mutate_Ekind.

2021-05-07  Bob Duff  <duff@adacore.com>

        * atree.adb: Move nnd-related code from here, and leave a
        comment pointing to sinfo-utils.adb.
        * sinfo-utils.ads, sinfo-utils.adb: Move nnd-related code to
        here.

2021-05-07  Piotr Trojanek  <trojanek@adacore.com>

        * einfo.ads: Move Corresponding_Protected_Entry...
        * sinfo.ads: ... here.
        * exp_ch9.adb (Build_Entry_Body): Link procedure and entry
        bodies.
        * gen_il-fields.ads (Opt_Field_Enum): Add
        Corresponding_Entry_Body field to nodes; remove
        Corresponding_Protected_Entry field from entities.
        * gen_il-gen-gen_entities.adb (Gen_Entities): Remove
        Corresponding_Protected_Entry field from E_Void and
        E_Subprogram_Body.
        * gen_il-gen-gen_nodes.adb (Gen_Nodes): Add
        Corresponding_Entry_Body field to N_Subprogram_Body.
        * sem_ch6.adb (Analyze_Subprogram_Specification): Remove
        manipulation of Ekind and Corresponding_Protected_Entry added as
        part of the support for varsize-nodes.

2021-05-07  Bob Duff  <duff@adacore.com>

        * sem_ch3.adb (Process_Incomplete_Dependents): Reset
        Private_Dependents field to zero before calling Set_Ekind.  Also
        move Set_Etype to after Set_Ekind, because it's always best to
        set the Ekind as early as possible.
        * atree.adb: Improve debugging facilities for vanishing fields.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * atree.ads (Slot): Change to modular type.
        (Slot_1_Bit): Delete.
        (Slot_2_Bit): Likewise.
        (Slot_4_Bit): Likewise.
        (Slot_8_Bit): Likewise.
        (Slot_32_Bit): Likewise.
        * atree.adb (Get_1_Bit_Val): Adjust to above change.
        (Get_2_Bit_Val): Likewise.
        (Get_4_Bit_Val): Likewise.
        (Get_8_Bit_Val): Likewise.
        (Get_32_Bit_Val): Likewise.
        (Set_1_Bit_Val): Likewise.
        (Set_2_Bit_Val): Likewise.
        (Set_4_Bit_Val): Likewise.
        (Set_8_Bit_Val): Likewise.
        (Set_32_Bit_Val): Likewise.
        (Print_Atree_Info): Likewise.
        (Zero): Likewise.
        * atree.h (Get_1_Bit_Field): Likewise.
        (Get_2_Bit_Field): Likewise.
        (Get_4_Bit_Field): Likewise.
        (Get_8_Bit_Field): Likewise.
        (Get_32_Bit_Field): Likewise.
        (Get_32_Bit_Field_With_Default): Likewise.
        * types.h (slot_1_bit): Delete.
        (slot_2_bit): Likewise.
        (slot_4_bit): Likewise.
        (slot_8_bit): Likewise.
        (slot_32_bit): Likewise.
        (any_slot): Change to unsigned int.
        (Slot_Size): New macro.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/gigi.h (enum standard_datatype): Remove
        ADT_exception_data_name_id and add ADT_not_handled_by_others_name_id.
        (exception_data_name_id): Delete.
        (not_handled_by_others_name_id): New macro.
        * gcc-interface/decl.c (gnat_to_gnu_entity) <E_Exception>: Remove old
        kludge for exceptions.
        <E_Record_Type>: Likewise.
        (gnat_to_gnu_field): Force character type on Not_Handled_By_Others.
        * gcc-interface/misc.c (gnat_argv): Change type to char **.
        (gnat_init_options): Adjust accordingly.
        * gcc-interface/trans.c (gigi): Set not_handled_by_others_name_id
        and use it to set not_handled_by_others_decl.
        (Exception_Handler_to_gnu_fe_sjlj): Fix indentation.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * raise-gcc.c (__gnat_others_value): Remove const qualifier.
        (__gnat_all_others_value): Likewise.
        (__gnat_unhandled_others_value): Likewise.
        (GNAT_OTHERS): Cast to Exception_Id instead of _Unwind_Ptr.
        (GNAT_ALL_OTHERS): Likewise.
        (GNAT_UNHANDLED_OTHERS): Likewise.
        (Is_Handled_By_Others): Change parameter type to Exception_Id.
        (Language_For): Likewise.
        (Foreign_Data_For): Likewise.
        (is_handled_by): Likewise.  Adjust throughout, remove redundant
        line and fix indentation.
        * libgnat/a-exexpr.adb (Is_Handled_By_Others): Remove pragma and
        useless qualification from parameter type.
        (Foreign_Data_For): Likewise.
        (Language_For): Likewise.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-stalib.ads (Exception_Data): Mark components as aliased.
        * stand.ads (Standard_Entity_Type): Enhance comments.
        * cstand.adb (Make_Component): Rename into...
        (Make_Aliased_Component): ...this; set Is_Aliased and Is_Independent
        flags on the component.
        (Create_Standard): Adjust the types of the component of the record
        Standard_Exception_Type and mark them as aliased.
        * exp_ch11.adb (Expand_N_Exception_Declaration): Use OK
        conversion to Standard_Address for Full_Name component, except
        in CodePeer_Mode (set it to 0).
        * exp_prag.adb (Expand_Pragma_Import_Or_Interface): Likewise.
        * raise.h (struct Exception_Data): Change the type of Full_Name,
        HTable_Ptr and Foreign_Data.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * atree.h (Slots_Ptr): Change pointed-to type to any_slot.
        * fe.h (Get_RT_Exception_Name): Change type of parameter.
        * namet.ads (Name_Entry): Mark non-boolean components as aliased,
        reorder the boolean components and add an explicit Spare component.
        * namet.adb (Name_Enter): Adjust aggregate accordingly.
        (Name_Find): Likewise.
        (Reinitialize): Likewise.
        * namet.h (struct Name_Entry): Adjust accordingly.
        (Names_Ptr): Use correct type.
        (Name_Chars_Ptr): Likewise.
        (Get_Name_String): Fix declaration and adjust to above changes.
        * types.ads (RT_Exception_Code): Add pragma Convention C.
        * types.h (Column_Number_Type): Fix original type.
        (slot): Rename union type to...
        (any_slot): ...this and adjust assertion accordingly.
        (RT_Exception_Code): New enumeration type.
        * uintp.ads (Uint_Entry): Mark components as aliased.
        * uintp.h (Uints_Ptr):  Use correct type.
        (Udigits_Ptr): Likewise.
        * gcc-interface/gigi.h (gigi): Adjust name and type of parameter.
        * gcc-interface/cuintp.c (UI_To_gnu): Adjust references to Uints_Ptr
        and Udigits_Ptr.
        * gcc-interface/trans.c (Slots_Ptr): Adjust pointed-to type.
        (gigi): Adjust type of parameter.
        (build_raise_check): Add cast in call to Get_RT_Exception_Name.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * init.c (__gnat_raise_program_error): Fix parameter type.
        (Raise_From_Signal_Handler): Likewise and mark as no-return.
        * raise-gcc.c (__gnat_others_value): Fix type.
        (__gnat_all_others_value): Likewise.
        (__gnat_unhandled_others_value): Likewise.
        * seh_init.c (Raise_From_Signal_Handler): Fix parameter type.
        * libgnat/a-except.ads (Raise_From_Signal_Handler): Use convention C
        and new symbol name, move declaration to...
        (Raise_From_Controlled_Operation): Minor tweak.
        * libgnat/a-except.adb (Raise_From_Signal_Handler): ...here.
        * libgnat/a-exexpr.adb (bool): New C compatible boolean type.
        (Is_Handled_By_Others): Use it as return type for the function.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * errout.ads (Set_Identifier_Casing): Add pragma Convention C.
        * eval_fat.ads (Rounding_Mode): Likewise.
        (Machine): Add WARNING comment line.
        * exp_code.ads (Clobber_Get_Next): Add pragma Convention C.
        * fe.h (Compiler_Abort): Fix return type.
        (Set_Identifier_Casing): Change type of parameters.
        (Clobber_Get_Next): Change return type.
        * gcc-interface/trans.c (gnat_to_gnu) <N_Code_Statement>: Add cast.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * atree.h (Parent): Remove duplicate declaration.
        (Get_1_Bit_Field): Also use INLINE specifier in the declaration,
        fix formatting and use gcc_unreachable for the default case.
        (Get_2_Bit_Field): Likewise.
        (Get_4_Bit_Field): Likewise.
        (Get_8_Bit_Field): Likewise.
        (Get_32_Bit_Field): Likewise.
        (Get_32_Bit_Field_With_Default): Likewise.

2021-05-07  Bob Duff  <duff@adacore.com>

        * atree.ads, atree.adb: Major rewrite to support variable-sized
        node types. Add pragmas Suppress and Assertion_Policy.  We now
        have an extra level of indirection: Node_Offsets is a table
        mapping Node_Ids to the offset of the start of each node in
        Slots. Slots is a table containing one or more contiguous slots
        for each node. Each slot is a 32-bit unchecked union that can
        contain any mixture of 1, 2, 4, 8, and 32-bit fields that fits.
        The old low-level getters and setters (e.g.  Flag123) are
        removed.
        * gen_il-fields.ads, gen_il-gen-gen_entities.adb,
        gen_il-gen-gen_nodes.adb, gen_il-gen.adb, gen_il-gen.ads,
        gen_il-main.adb, gen_il-types.ads, gen_il-utils.adb,
        gen_il-utils.ads, gen_il.adb, gen_il.ads: New gen_il program
        that generates various Ada and C++ files. In particular, the
        following files are generated by gen_il: einfo-entities.adb
        einfo-entities.ads, gnatvsn.ads, nmake.adb, nmake.ads,
        seinfo.ads, seinfo_tables.adb, seinfo_tables.ads,
        sinfo-nodes.adb, sinfo-nodes.ads, einfo.h, and sinfo.h.
        * sinfo-utils.adb, sinfo-utils.ads, einfo-utils.adb,
        einfo-utils.ads: New files containing code that needs to refer
        to Sinfo.Nodes and Einfo.Entities. This code is mostly moved
        here from Sinfo and Einfo to break cycles.
        * back_end.adb: Pass node_offsets_ptr and slots_ptr to gigi,
        instead of nodes_ptr and flags_ptr. The Nodes and Flags tables
        no longer exist. (Note that gigi never used the Flags table.)
        * sinfo-cn.ads (Change_Identifier_To_Defining_Identifier,
        Change_Character_Literal_To_Defining_Character_Literal,
        Change_Operator_Symbol_To_Defining_Operator_Symbol): Turn N into
        an IN formal.
        * sinfo-cn.adb: Update.  Add assertions, which can be removed at
        some point.  Rewrite to use higher-level facilities.  Make sure
        vanishing fields are zeroed out.  Add with/use for new packages.
        * sem_util.adb: Remove "Assert(False)" immediately followed by
        "raise Program_Error".  Use higher-level facilities such as
        Walk_Sinfo_Fields instead of depending on low-level Set_FieldN
        routines that no longer exist. Use Get_Comes_From_Source_Default
        instead of Default_Node.Comes_From_Source (Default_Node no
        longer exists).  Use Set_Basic_Convention instead of
        Basic_Set_Convention.  Add with/use for new packages.
        * sem_util.ads: The Convention field had getter Convention and
        setter Basic_Set_Convention. Make that more uniform: there is
        now a field called Basic_Convention, with Basic_Convention and
        Set_Basic_Convention as getter/setter, and write Convention and
        Set_Convention here.
        * nlists.adb: Rewrite to use abstractions, rather then depending
        on low-level implementation details of Atree. Necessary because
        those details have changed. Add with/use for new packages.
        * sem_ch12.adb: Use higher-level facilities such as
        Walk_Sinfo_Fields instead of depending on low-level Set_FieldN
        routines that no longer exist. Add with/use for new packages.
        * exp_cg.adb, sem_ch10.adb, sem_ch4.adb, sem_eval.adb,
        sem_prag.adb, sem_warn.adb: Change expanded names to refer to
        the new packages for things that moved. Add with/use for new
        packages.
        * sem_ch3.adb: Likewise. Reinitialize vanishing fields.
        * exp_disp.adb: Likewise. Remove failing assertion.
        * sinfo.ads, einfo.ads: Remove code that is now generated into
        Sinfo.Nodes and Einfo.Entities.
        * sinfo.adb, einfo.adb: Replace bodies with "pragma No_Body;".
        We should delete these at some point, but No_Body makes make
        files easier. Some code is moved to Sinfo.Nodes, Einfo.Entities,
        Sinfo.Utils, and Einfo.Utils. Some is no longer necessary.
        * treepr.adb: Rewrite to use new tables. We no longer need
        treeprs.ads.
        * treepr.ads: Add comment.
        * types.ads: Move types Component_Alignment_Kind and
        Float_Rep_Kind here.
        * atree.h: Major update to match atree.ads changes.  Add slot
        types, for use by getters/setters.
        * types.h: Move types Component_Alignment_Kind and
        Float_Rep_Kind here.
        * fe.h: Rewrite to deal with code that has changed or moved from
        Atree, Sinfo, Einfo.
        * nlists.h: Move some code to fe.h.
        * alloc.ads: Split Nodes_* constants into Node_Offsets and
        Slots, because Atree has two separate tables.  Increase values.
        Remove Nodes_Release_Threshold. Improve comment.
        * debug.adb, gnat1drv.adb: Remove obsolete gnatd.A and gnatd.N
        switches.  Add with/use for new packages.
        * opt.ads: Minor comment fix.
        * aspects.adb, checks.adb, comperr.adb, contracts.adb,
        cstand.adb, debug_a.adb, errout.adb, eval_fat.adb, exp_aggr.adb,
        exp_atag.adb, exp_attr.adb, exp_ch11.adb, exp_ch12.adb,
        exp_ch13.adb, exp_ch2.adb, exp_ch3.adb, exp_ch4.adb,
        exp_ch5.adb, exp_ch6.adb, exp_ch7.adb, exp_ch8.adb, exp_ch9.adb,
        exp_code.adb, exp_dbug.adb, exp_dist.adb, exp_fixd.adb,
        exp_imgv.adb, exp_intr.adb, exp_pakd.adb, exp_prag.adb,
        exp_put_image.adb, exp_sel.adb, exp_smem.adb, exp_spark.adb,
        exp_strm.adb, exp_tss.adb, exp_unst.adb, exp_util.adb,
        exp_util.ads, expander.adb, freeze.adb, frontend.adb,
        get_targ.ads, ghost.adb, gnat_cuda.adb, impunit.adb, inline.adb,
        itypes.adb, itypes.ads, layout.adb, lib.adb, lib-load.adb,
        lib-writ.adb, lib-xref.adb, lib-xref.ads,
        lib-xref-spark_specific.adb, live.adb, par.adb, par_sco.adb,
        pprint.adb, repinfo.adb, restrict.adb, rtsfind.adb, scil_ll.adb,
        scn.adb, sem.adb, sem.ads, sem_aggr.adb, sem_attr.adb,
        sem_aux.adb, sem_case.adb, sem_cat.adb, sem_ch11.adb,
        sem_ch13.adb, sem_ch2.adb, sem_ch5.adb, sem_ch6.adb,
        sem_ch7.adb, sem_ch8.adb, sem_ch9.adb, sem_dim.adb,
        sem_disp.adb, sem_dist.adb, sem_elab.adb, sem_elim.adb,
        sem_intr.adb, sem_mech.adb, sem_res.adb, sem_scil.adb,
        sem_smem.adb, sem_type.adb, set_targ.ads, sinput.adb,
        sinput-l.adb, sprint.adb, style.adb, styleg.adb, tbuild.adb,
        tbuild.ads, uname.adb: Add with/use for new packages.
        * libgnat/a-stoubu.adb, libgnat/a-stouut.adb: Simplify to ease
        bootstrap.
        * libgnat/a-stobfi.adb, libgnat/a-stoufi.adb (Create_File,
        Create_New_File): Create file in binary format, to avoid
        introducing unwanted text conversions on Windows. Simplify to
        ease bootstrap.
        * libgnat/a-stteou__bootstrap.ads: New.
        * ceinfo.adb, csinfo.adb, nmake.adt, treeprs.adt, xeinfo.adb,
        xnmake.adb, xsinfo.adb, xtreeprs.adb: Delete.
        * Make-generated.in: Build and run the gen_il program to
        generate files. The files are generated in the ada/gen_il
        subdirectory, and then moved up to ada.  We rely on gnatmake (as
        opposed to make) to build the gen_il program efficiently (i.e.
        don't do anything if the sources didn't change).
        * gcc-interface/Makefile.in (ADAFLAGS): Add -gnatU.
        (GNATMAKE_OBJS): Add new object files.
        (GENERATED_FILES_FOR_TOOLS): New variable.
        (../stamp-tools): Create a link for all
        GENERATED_FILES_FOR_TOOLS.
        * gcc-interface/Make-lang.in (GNAT_ADA_OBJS): Add new object
        files.  Remove ada/treeprs.o.
        (GNATBIND_OBJS): Add new object files.
        (ada.mostlyclean): Remove ada/sdefault.adb and add
        ada/stamp-gen_il.
        (ada.maintainer-clean): Remove ada/treeprs.ads.
        (update-sources): Remove obsolete target.
        (ada_generated_files): Rename to...
        (ADA_GENERATED_FILES): ... this.  Add new source files.  Add
        comment.
        * gcc-interface/trans.c: Remove obsolete Nodes_Ptr and
        Flags_ptr.  Add Node_Offsets_Ptr and Slots_Ptr, which point to
        the corresponding tables in Atree.
        * gcc-interface/gigi.h (gigi): New parameters for initializing
        Node_Offsets_Ptr and Slots_Ptr.
        * gcc-interface/decl.c: Numeric_Kind,
        Discrete_Or_Fixed_Point_Kind, and Record_Kind were
        nonhierarchical, and were therefore removed for simplicity.
        Replace uses with calls to Is_In_... functions.

2021-05-07  Ed Schonberg  <schonberg@adacore.com>

        * exp_ch4.adb (Unconstrained_UU_In_Component_Declaration): A
        component declaration whose subtype indication is an entity name
        without an explicit constraint is an Unchecked_Union type only
        if the entity has an unconstrained nominal subtype (record type
        or private type) whose parent type is an Unchecked_Union.

2021-05-07  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Flag_Object): Ignore prefixes of attribute
        Address.

2021-05-07  Yannick Moy  <moy@adacore.com>

        * opt.ads: Update comment for Warn_On_Suspicious_Modulus_Value.
        * sem_res.adb (Resolve_Unary_Op): Generate warning.
        * usage.adb: Refine doc for -gnatw.m/M switch.
        * doc/gnat_ugn/building_executable_programs_with_gnat.rst:
        Update doc on -gnatw.m switch.
        * gnat_ugn.texi: Regenerate.

2021-05-07  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (Flag_Object): Replace chained IF with a CASE;
        remove repeated calls to Entity; do not traverse into
        N_Identifier and N_Expanded_Name, because only need to examine
        their Entity field anyway.

2021-05-07  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch4.adb (Analyze_Call): Remove call to End_Interp_List.
        (Process_Overloaded_Indexed_Component): Remove call to
        End_Interp_List.
        * sem_util.adb (Insert_Explicit_Dereference): Remove call to
        End_Interp_List.
        * sem_type.ads (End_Interp_List): Remove.
        * sem_type.adb (Add_Entry): The guard against duplicate entries
        is now checked before other conditions, so that EXIT statements
        do not bypass this guard.
        (End_Interp_List): Remove.

2021-05-07  Ed Schonberg  <schonberg@adacore.com>

        * exp_util.adb (Remove_Init_Call): If a simple initialization
        call is present, and the next statement is an initialization
        block (that contains a call to a Deep_ Initialize routine),
        remove the block as well, and insert the first initialization
        call in it, in case it is needed for later relocation.

2021-05-07  Gary Dismukes  <dismukes@adacore.com>

        * errout.ads (Size_Too_Small_Message): Remove low-value ???
        comment.
        * exp_util.ads: Remove ??? in part of overall package comments
        and restructure comment to clarify.
        (Duplicate_Subexpr): Remove ??? comment that seems unnecessary.
        * sem_ch3.ads (Analyze_Declarations): Remove two parenthesized
        ??? comments and add more description of the procedure's
        actions.
        (Get_Discriminant_Value): Remove ??? comment requesting more
        documentation, expanding description of the function's actions.
        * sem_disp.ads (Check_Operation_From_Incomplete_Type): Add more
        semantic description of the procedure and remove ??? comment
        requesting such.
        (Propagate_Tag): Refine comment to indicate meaning of formal
        parameters and generally improve the spec comment (and remove
        ??? comment asking about the parameters).

2021-05-07  Arnaud Charlet  <charlet@adacore.com>

        * sem_eval.adb (Fold_Shift): Fix computation of Shift_Left
        resulting in negative signed values.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_util.ads (Defining_Entity): Remove Empty_On_Errors parameter.
        (Defining_Entity_Or_Empty): New function.
        * sem_util.adb (Defining_Entity): Move bulk of implementation to...
        (Defining_Entity_Or_Empty): ...here.  Do not raise Program_Error.
        (Innermost_Master_Scope_Depth): Call Defining_Entity_Or_Empty.

2021-05-07  Justin Squirek  <squirek@adacore.com>

        * aspects.ads: Add entries to register
        Aspect_No_Controlled_Parts.
        * freeze.adb (Check_No_Controlled_Parts_Violations): Added to
        check requirements of aspect No_Controlled_Parts after a type
        has been frozen.
        (Freeze_Entity): Add call to
        Check_No_Controlled_Parts_Violations.
        (Find_Aspect_No_Controlled_Parts): Created to obtain the aspect
        specification for No_Controlled_Parts on a given type when
        present.
        (Find_Aspect_No_Controlled_Parts_Value): Protect against invalid
        value.
        (Has_Aspect_No_Controlled_Parts): Created as a prediate function
        to check if No_Controlled_Parts has been specified on a type for
        Get_Anacestor_Types_With_Specification.
        (Get_Aspect_No_Controlled_Parts_Value): Created to obtain the
        value of the aspect No_Controlled_Parts when specified on a
        given type.
        (Get_Generic_Formal_Types_In_Hierarchy): Created to collect
        formal types in a given type's hierarchy.
        (Get_Types_With_Aspect_In_Hierarchy): Created to collect types
        in a given type's hierarchy with No_Controlled_Parts specified.
        * sem_ch13.adb (Analyze_One_Aspect): Add processing for
        No_Controlled_Parts, and fix error in check for allowed pragmas
        for formal types.
        (Check_Expr_Is_OK_Static_Expression): Created to enforce
        checking of static expressions in the same vein as
        Analyze_Pragma.Check_Expr_OK_Static_Expression.
        * sem_util.adb (Collect_Types_In_Hierarchy): Created to collect
        types in a given type's hierarchy that match a given predicate
        function.
        * sem_util.ads: Fix typo.
        * snames.ads-tmpl: Add entry for No_Controlled_Parts.

2021-05-07  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-fatgen.adb (Scaling): Raise Constraint_Error in the
        overflow case when T'Machine_Overflows is True.

2021-05-07  Bob Duff  <duff@adacore.com>

        * libgnat/a-conhel.adb (TC_Check): Move the Assert into the
        'if'.

2021-05-07  Frederic Konrad  <konrad@adacore.com>

        * sigtramp-vxworks-target.inc: Use a local label for the TOC.

2021-05-07  Claire Dross  <dross@adacore.com>

        * exp_ch4.adb (Has_Inferable_Discriminants): Moved to Sem_Util.
        * sem_util.ads, sem_util.adb (Has_Inferable_Discriminants):
        Moved from Exp_Ch4.

2021-05-07  Ed Schonberg  <schonberg@adacore.com>

        * exp_util.adb (Build_Class_Wide_Expression, Replace_Entity):
        Add guard to verify that the enclosing pragma is a precondition.

2021-05-06  Javier Miranda  <miranda@adacore.com>

        * exp_disp.adb (Build_Class_Wide_Check): Extending the
        functionality of this routine to climb to the ancestors
        searching for the enclosing overridden dispatching primitive
        that has a class-wide precondition to generate the check.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch3.adb (Constraint_Index): Remove redundant problematic
        analysis.

2021-05-06  Arnaud Charlet  <charlet@adacore.com>

        * exp_unst.adb (Note_Uplevel_Bound): Exclude
        E_Enumeration_Literal.

2021-05-06  Arnaud Charlet  <charlet@adacore.com>

        * exp_ch4.adb (Expand_N_If_Expression):
        Apply_Arithmetic_Overflow_Check will not deal with
        Then/Else_Actions so skip minimizing overflow checks if any
        actions are present.

2021-05-06  Boris Yakobowski  <yakobowski@adacore.com>

        * gnat1drv.adb (Adjust_Global_Switches): Simplify logic.

2021-05-06  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/i-c.ads (bool): New type.
        * libgnat/i-cexten.ads, libgnat/i-cexten__128.ads (bool): Now
        a subtype of Interfaces.C.bool.
        * libgnarl/s-interr__vxworks.adb (Interrupt_Manager): Qualify
        False.
        * libgnarl/s-interr.adb, libgnarl/s-interr__hwint.adb,
        libgnarl/s-tasini.adb, libgnarl/s-tasren.adb,
        libgnarl/s-tassta.adb, libgnarl/s-tpobmu.adb,
        libgnarl/s-tpobop.adb, libgnarl/s-tpopmo.adb: Replace
        Assert (False) by Assert (Standard.False).

2021-05-06  Ghjuvan Lacambre  <lacambre@adacore.com>

        * make.adb (Compute_Executable): Document parameter.

2021-05-06  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-fatgen.adb (Scaling): Use single handling of
        underflow.  Add pragma Annotate.

2021-05-06  Ghjuvan Lacambre  <lacambre@adacore.com>

        * sem_eval.adb (Is_OK_Static_Subtype): Call Is_Static_Subtype,
        remove redundant checks.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.adb (First_Last_Ref): Simplify "if [condition] then
        return True" in "return [condition]".
        (Resolve_Range): Remove calls appearing in IF condition from the
        THEN statements.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * sem_case.adb (Missing_Choice): Fix typo in comment.
        (Lit_Of): Simplify with Make_Character_Literal.
        (Check_Choices): Remove extra spaces in parameter
        specifications.
        * sem_case.ads: Same reformatting.

2021-05-06  Ed Schonberg  <schonberg@adacore.com>

        * exp_aggr.adb (Expand_Array_Aggregate): If the expression in an
        Others_Clause has not been analyzed because previous analysis of
        the enclosing aggregate showed the clause to be ineffective i.e.
        cover a null range, analyze it now to detect a possible type
        illegality.

2021-05-06  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-fatgen.adb (Scaling): Fix off-by-one bug for underflow.

2021-05-06  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch6.adb (Is_Inline_Pragma): Protect against N not being a
        list member in both branches.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/a-cofove.adb (Insert_Space): Remove hardcoded pragma
        Warnings.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch4.adb (Analyze_Selected_Component): Remove explicit call
        to Set_Raises_Constraint_Error on statically missing component.
        * sem_eval.adb (Eval_Arithmetic_Op): Likewise for static
        divisions by integer and real zeros.
        * sem_util.adb (Apply_Compile_Time_Constraint_Error): Call
        Set_Raises_Constraint_Error before exiting early in GNATprove
        mode.

2021-05-06  Justin Squirek  <squirek@adacore.com>

        * checks.adb (Make_Discriminant_Constraint_Check): Add check for
        null when the type being converted is an access type.

2021-05-06  Arnaud Charlet  <charlet@adacore.com>

        * exp_pakd.adb (Expand_Packed_Eq): Fix handling of PATs.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * osint.adb (Read_Library_Info_From_Full): Cleanup unused
        initial value.

2021-05-06  Eric Botcazou  <ebotcazou@adacore.com>

        * doc/gnat_rm/implementation_defined_characteristics.rst (3.5.7):
        Mention the IEEE standard explicitly.  Use current format names.
        Document assumed rounding mode and new features of I/O support.
        * gnat_rm.texi: Regenerate.

2021-05-06  Eric Botcazou  <ebotcazou@adacore.com>

        * init.c (__gnat_init_float): Use full version on Linux too.

2021-05-06  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-fatgen.adb (Valid): Do a bit comparison with 0.0
        when denormalized numbers are not supported.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * sem_attr.adb (Check_Enum_Image): Reword comment; add
        Check_Enumeration_Maps parameter.  Now this routine combines
        both referencing enumeration literals and checking restriction
        No_Enumeration_Maps, if required.
        (Analyze_Attribute): Remove duplicated code and instead call
        Check_Enum_Image.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * sem_attr.adb (Analyze_Image_Attribute): Remove redundant
        condition; add a missing header box.

2021-05-06  Gary Dismukes  <dismukes@adacore.com>

        * doc/gnat_ugn/building_executable_programs_with_gnat.rst: Add
        mention of underscore and fix grammar error in doc for -gnatd.
        * gnat_ugn.texi: Regenerate.

2021-05-06  Eric Botcazou  <ebotcazou@adacore.com>

        * Makefile.rtl (GNATRTL_NONTASKING_OBJS): Add s-exponr, s-exnflt
        and s-exnlfl.
        * exp_ch4.adb (Expand_N_Op_Expon): Use RE_Exn_Float for Short_Float.
        * rtsfind.ads (RTU_Id): Add System_Exn_Flt and System_Exn_LFlt.
        (RE_Id): Adjust entries for RE_Exn_Float and RE_Exn_Long_Float.
        (RE_Unit_Table): Likewise.
        * libgnat/s-exnflt.ads: New file.
        * libgnat/s-exnlfl.ads: Likewise.
        * libgnat/s-exnllf.ads: Change to mere instantiation.
        * libgnat/s-exnllf.adb: Move implementation to...
        * libgnat/s-exponr.ads: New generic unit.
        * libgnat/s-exponr.adb: ...here and also make it generic.
        (Expon): Do the computation in double precision internally.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * lib-writ.adb, osint.adb, osint.ads: Cleanup.

2021-05-06  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch3.adb (Expand_Freeze_Array_Type): Remove excessive
        condition.
        (Expand_N_Object_Declaration): Likewise.
        (Build_Equivalent_Aggregate): Likewise.
        (Initialization_Warning): Likewise; change another excessive
        condition into assertion.
        * freeze.adb (Freeze_Entity): Remove excessive condition.

2021-05-06  Ed Schonberg  <schonberg@adacore.com>

        * sem_res.adb (Resolve_If_Expression): If the context of the
        expression is an indexed_component, resolve the expression and
        its dependent_expressions with the base type of the index, to
        ensure that an index check is generated when resolving the
        enclosing indexxed_component, and avoid an improper use of
        discriminants out of scope, when the index type is
        discriminant-dependent.

2021-05-06  Arnaud Charlet  <charlet@adacore.com>

        * einfo.ads, exp_prag.adb, exp_util.adb: Fix typos.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_attr.adb (Expand_N_Attribute_Reference): Fix expansion of
        attributes Input and Output for unchecked unions.
        * sem_case.ads: Fix typo "disriminant" and refill comment.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_attr.adb, exp_ch9.adb, sem_ch3.adb: Reuse
        Has_Defaulted_Discriminants.
        * sem_ch4.adb (Analyze_Allocator): Reuse
        Has_Defaulted_Discriminants (after reordering conjuncts); remove
        redundant IF statement, whose condition is implied by
        Has_Defaulted_Discriminants.
        * sem_util.adb (Has_Defaulted_Discriminants): Has_Discriminants
        implies that the First_Discriminant is present.
        (Is_Fully_Initialized_Type): Reuse Has_Defaulted_Discriminants.

2021-05-05  Justin Squirek  <squirek@adacore.com>

        * exp_ch6.adb (Expand_Call_Helper): Add condition to check for
        expanded actuals and remove dead code.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Has_Unconstrained_UU_Component): Rewrite to
        follow the Ada RM grammar.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (User_Defined_Primitive_Equality_Op): Refine type
        of a local variable.
        * exp_dbug.adb (Scope_Contains): Refine all types from Node_Id
        to Entity_Id; rename parameters to match those of the
        Scope_Within routine (which is similar but not the same); also,
        simplify an OR ELSE into a membership test.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Component_Is_Unconstrained_UU): Detect both
        qualified and unqualified names of unchecked union components.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Variant_Is_Unconstrained_UU): Remove redundant
        check for empty list.
        * exp_disp.adb (Find_Entry_Index): Simplify by removing
        redundant check and counting from zero; fix type of a local
        variable.
        * sem_ch12.adb (Save_Global_Descendant): Remove an unnecessary
        special-case for empty lists.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Apply_Accessibility_Check): Skip a statically
        true condition in expanded raise statement.

2021-05-05  Bob Duff  <duff@adacore.com>

        * libgnat/s-os_lib.adb (Missed_Drive_Letter): Simplify the code.

2021-05-05  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch5.adb (Analyze_Assignment): Do not emit the warning that
        a previous value of the target object is useless if the
        right-hand side of the assignment includes target names.

2021-05-05  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_imgv.adb: Add with/use clauses for Targparm.
        (Build_Enumeration_Image_Tables): Set type of Threshold to Nat and
        initialize it to Nat'Last if the type is local and the target does
        not support descriptors.  Adjust Threshold_For_Size similarly.
        (Expand_Value_Attribute): Minor tweaks.

2021-05-05  Ghjuvan Lacambre  <lacambre@adacore.com>

        * exp_ch7.adb (Expand_N_Package_Body): Add CUDA init call.
        * sem_ch7.adb (Analyze_Package_Body_Helper): Remove CUDA init
        call.

2021-05-05  Ghjuvan Lacambre  <lacambre@adacore.com>

        * par-ch5.adb (P_Condition): Check if expression is declare
        expression.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * make.adb (Make): Use GNAT.Ctrl_C.Install_Handler instead of a
        custom imported procedure.

2021-05-05  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_imgv.adb (Is_User_Defined_Enumeration_Type): Delete.
        (Expand_Image_Attribute): Move inline expansion into normal flow of
        control, move down declarations and remove superfluous processing.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * libgnat/g-alleve.adb (Bit_Operation): Now a not-null type.
        * libgnat/g-sechas.adb (Fill_Buffer_Access): Likewise.
        * libgnat/s-dwalin.adb (Callback): Likewise.

2021-05-05  Ghjuvan Lacambre  <lacambre@adacore.com>

        * exp_util.adb (Is_Possibly_Unaligned_Object): Remove commented
        code.

2021-05-05  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch3.adb (Find_Type_Of_Object):  When In_Spec_Expression is
        set and the object declaration generates a subtype indication,
        build the corresponding subtype declaration and place it in tree
        without the use of Insert_Actions, which is disabled in this
        context.

2021-05-05  Eric Botcazou  <ebotcazou@adacore.com>

        * debug.adb (d_x): Document extended usage.
        * exp_imgv.adb (Expand_Standard_Boolean_Image): New procedure.
        (Expand_Image_Attribute): Call it to expand in line the attribute
        for standard boolean by default.

2021-05-05  Eric Botcazou  <ebotcazou@adacore.com>

        * debug.adb (d_x): Document new usage.
        * exp_imgv.adb (Expand_User_Defined_Enumeration_Image): Add Typ
        parameter and use it throughout the processing.
        (Expand_Image_Attribute): Retrieve the underlying type of the
        prefix and use the inline expansion for user-defined enumeration
        types with a literal string by default.

2021-05-05  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-dorepr.adb (Split): Declare a per-size temporary.
        Add pragma Annotate.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb, sem_ch13.adb, sem_eval.adb, sem_res.adb: Remove
        redundant calls to UI_From_Int.

2021-05-05  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_imgv.ads (Build_Enumeration_Image_Tables): Adjust comment.
        * exp_imgv.adb (Build_Enumeration_Image_Tables): Add the
        declaration nodes of the 4 tables to the declaration list of the
        function body.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * Makefile.rtl (GNATRTL_NONTASKING_OBJS): Add s-imagen, s-imen16,
        s-imen32, s-imenu8, s-pehage, s-valuen, s-vaen16, s-vaen32 and
        s-vaenu8.  Remove s-imenne, s-imgenu and s-valenu.
        * debug.adb (d_h): Document new usage.
        * einfo.ads (Lit_Hash): New attribute for enumeration types.
        (Set_Lit_Hash): Declare.
        * einfo.adb (Lit_Hash): New function.
        (Set_Lit_Hash): New procedure.
        (Write_Field21_Name): Print Lit_Hash for Enumeration_Kind.
        * exp_imgv.ads (Build_Enumeration_Image_Tables): Fix description
        and document the hash function and its tables.
        * exp_imgv.adb: Add with/use clauses for Debug.  Add with clause
        for System.Perfect_Hash_Generators.
        (Append_Table_To): New helper routine.
        (Build_Enumeration_Image_Tables): Call it to build the tables.
        In the main unit, register the literals with the hash generator.
        If they are sufficiently many and -gnatd_h is not passed, generate
        a perfect hash function and its tables; otherwise, generate a dummy
        hash function.  For the other units, generate only the declaration.
        In all cases, set Lit_Hash to the entity of the function, if any.
        (Expand_Value_Attribute): Pass the 'Unrestricted_Access of Lit_Hash,
        if any, as third argument to the Value_Enumeration_NN function.
        * gnat1drv.adb (Adjust_Global_Switches): force simpler implementation
        of 'Value in CodePeer_Mode.
        * lib.ads (Synchronize_Serial_Number): Add SN parameter.
        * lib.adb (Synchronize_Serial_Number): Assert that it is larger than
        the serial number of the current unit and set the latter to it only
        in this case.
        * rtsfind.ads (RTU_Id): Add System_Img_Enum_8, System_Img_Enum_16,
        System_Img_Enum_32, System_Val_Enum_8, System_Val_Enum_16 and
        System_Val_Enum_32.  Remove System_Img_Enum, System_Img_Enum_New
        and System_Val_Enum.
        * sem_attr.adb (Analyze_Access_Attribute): Do not flag a compiler
        generated Unrestricted_Access attribute as illegal in a declare
        expression.
        (RE_Unit_Table): Adjust to above changes.
        * libgnat/g-heasor.ads: Add pragma Compiler_Unit_Warning.
        * libgnat/g-table.ads: Likewise.
        * libgnat/g-pehage.ads: Add with clause and local renaming for
        System.Perfect_Hash_Generators.
        (Optimization): Turn into derived type.
        (Verbose): Turn into renaming.
        (Too_Many_Tries): Likewise.
        (Table_Name): Move to System.Perfect_Hash_Generators.
        (Define): Likewise.
        (Value): Likewise.
        * libgnat/g-pehage.adb: Remove with clause for Ada.Directories,
        GNAT.Heap_Sort_G and GNAT.Table.  Move bulk of implementation
        to System.Perfect_Hash_Generators, only keep the output part.
        * libgnat/s-imagen.ads: New generic unit.
        * libgnat/s-imagen.adb: New body.
        * libgnat/s-imen16.ads: New unit.
        * libgnat/s-imen32.ads: Likewise.
        * libgnat/s-imenu8.ads: Likewise.
        * libgnat/s-imenne.ads: Adjust description.
        * libgnat/s-imgenu.ads: Delete.
        * libgnat/s-imgenu.adb: Likewise.
        * libgnat/s-pehage.ads: New unit from GNAT.Perfect_Hash_Generators.
        * libgnat/s-pehage.adb: New body from GNAT.Perfect_Hash_Generators.
        * libgnat/s-valuen.ads: New generic unit.
        * libgnat/s-valuen.adb: New body.
        * libgnat/s-vaen16.ads: New unit.
        * libgnat/s-vaen32.ads: Likewise.
        * libgnat/s-vaenu8.ads: Likewise.
        * libgnat/s-valenu.ads: Delete.
        * libgnat/s-valenu.adb: Likewise.
        * gcc-interface/Make-lang.in (GNAT_ADA_OBJS): Add s-pehage.o.
        (GNATBIND_OBJS): Remove s-imgenu.o.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * sem_util.ads (Apply_Compile_Time_Constraint_Error): Remove
        parameter Rep from the function spec and "and if the flag Rep is
        set" from the comment.
        * sem_util.adb (Apply_Compile_Time_Constraint_Error): Remove
        parameter Rep.

2021-05-05  Ed Schonberg  <schonberg@adacore.com>

        * sem_aggr.adb (Resolve_Indexed_Aggregate): For indexed
        aggregates with component associations verify that if there is
        more than one component association then all the choices are
        static, that the set of choices define a continuous sequence of
        values, and that if loop specfications appear, they do not
        include iterator filters or key expressions.

2021-05-05  Eric Botcazou  <ebotcazou@adacore.com>

        * Makefile.rtl (GNATRTL_NONTASKING_OBJS): Add s-dourea, s-imager,
        s-imgflt, s-imglfl and s-imgllf.
        (LIBGNAT_TARGET_PAIRS) [PowerPC/VxWorks]: Use s-dorepr__fma.adb.
        (LIBGNAT_TARGET_PAIRS) [PowerPC/VxWorksAE]: Likewise.
        (LIBGNAT_TARGET_PAIRS) [Aarch64/VxWorks]: Likewise.
        (LIBGNAT_TARGET_PAIRS) [Aarch64/QNX]: Likewise.
        (LIBGNAT_TARGET_PAIRS) [Aarch64/FreeBSD]: Likewise.
        (LIBGNAT_TARGET_PAIRS) [PowerPC/Linux]: Likewise.
        (LIBGNAT_TARGET_PAIRS) [Aarch64/Linux]: Likewise.
        (LIBGNAT_TARGET_PAIRS) [IA-64/Linux]: Likewise.
        (LIBGNAT_TARGET_PAIRS) [IA-64/HP-UX]: Likewise.
        (LIBGNAT_TARGET_PAIRS) [RISC-V/Linux]: Likewise.
        (LIBGNAT_TARGET_PAIRS) [PowerPC/Darwin]: Likewise.
        * exp_attr.adb (Expand_N_Attribute_Reference) [Attribute_Fore]: Use
        Fixed suffix and Long_Float type.
        * exp_imgv.adb (Expand_Image_Attribute): For floating-point types,
        use the routine of the corresponding root type.  For ordinary fixed
        point types, use Fixed suffix and Long_Float type.
        (Expand_Value_Attribute): Revert latest change for Long_Long_Float.
        * gcc-interface/Make-lang.in (GNAT_ADA_OBJS): Remove libgnat units
        g-hesora.o and s-imgenu.o, add g-heasor.o, g-table.o and s-pehage.o.
        (GNATBIND_OBJS): Remove libgnat unit s-imgenu.o.
        * rtsfind.ads (RTU_Id): Add System_Img_Flt, System_Img_LFlt and
        System_Img_LLF.  Remove System_Img_Real.
        (RE_Id): Rename RE_Fore_Real to RE_Fore_Fixed.  Add RE_Image_Float,
        RE_Image_Long_Float and RE_Image_Long_Long_Float.  Rename
        RE_Image_Ordinary_Fixed_Point to RE_Image_Fixed.
        (RE_Unit_Table): Adjust to above changes.
        * libgnat/a-nbnbre.adb (Fixed_Conversions): Use Long_Float instead
        of Long_Long_Float.
        * libgnat/a-textio.ads (Field): Remove obsolete comment.
        * libgnat/a-ticoau.ads (Aux): Adjust ancestor package.
        * libgnat/a-ticoau.adb: Remove with/use clause for System.Img_Real.
        (Puts): Call Aux.Set_Image instead of Set_Image_Real.
        * libgnat/a-ticoio.adb: Add with/use clauses for System.Img_Flt,
        System.Img_LFlt and System.Img_LLF.
        (Scalar_Float): Add third actual parameter.
        (Scalar_Long_Float): Likewise.
        (Scalar_Long_Long_Float): Likewise.
        * libgnat/a-tifiio.adb: Add with/use clauses for System.Img_LFlt
        and System.Val_LFlt.  Remove the one for System.Val_LLF.  Replace
        Long_Long_Float with Long_Float throughout.
        * libgnat/a-tifiio__128.adb: Likewise.
        * libgnat/a-tiflau.ads: Add Set_Image formal parameter.
        * libgnat/a-tiflau.adb: Add with/use clause for System.Img_Util,
        remove the one for System.Img_Real.
        (Put): Call Set_Image instead of Set_Image_Real.
        (Puts): Likewise.
        * libgnat/a-tiflio.adb: Add with/use clause for System.Img_Flt,
        System.Img_LFlt and System.Img_LLF.
        (Aux_Float): Add third actual parameter.
        (Aux_Long_Float): Likewise.
        (Aux_Long_Long_Float): Likewise.
        * libgnat/a-witeio.ads (Field): Remove obsolete comment.
        * libgnat/a-wtcoau.ads (Aux): Adjust ancestor package.
        * libgnat/a-wtcoau.adb: Remove with/use clause for System.Img_Real.
        (Puts): Call Aux.Set_Image instead of Set_Image_Real.
        * libgnat/a-wtcoio.adb: Add with/use clauses for System.Img_Flt,
        System.Img_LFlt and System.Img_LLF.
        (Scalar_Float): Add third actual parameter.
        (Scalar_Long_Float): Likewise.
        (Scalar_Long_Long_Float): Likewise.
        * libgnat/a-wtfiio.adb: Add with/use clauses for System.Img_LFlt
        and System.Val_LFlt.  Remove the one for System.Val_LLF.  Replace
        Long_Long_Float with Long_Float throughout.
        * libgnat/a-wtfiio__128.adb: Likewise.
        * libgnat/a-wtflau.ads: Add Set_Image formal parameter.
        * libgnat/a-wtflau.adb: Add with/use clause for System.Img_Util,
        remove the one for System.Img_Real.
        (Put): Call Set_Image instead of Set_Image_Real.
        (Puts): Likewise.
        * libgnat/a-wtflio.adb: Add with/use clause for System.Img_Flt,
        System.Img_LFlt and System.Img_LLF.
        (Aux_Float): Add third actual parameter.
        (Aux_Long_Float): Likewise.
        (Aux_Long_Long_Float): Likewise.
        * libgnat/a-ztexio.ads (Field): Remove obsolete comment.
        * libgnat/a-ztcoau.ads (Aux): Adjust ancestor package.
        * libgnat/a-ztcoau.adb: Remove with/use clause for System.Img_Real.
        (Puts): Call Aux.Set_Image instead of Set_Image_Real.
        * libgnat/a-ztcoio.adb: Add with/use clauses for System.Img_Flt,
        System.Img_LFlt and System.Img_LLF.
        (Scalar_Float): Add third actual parameter.
        (Scalar_Long_Float): Likewise.
        (Scalar_Long_Long_Float): Likewise.
        * libgnat/a-ztfiio.adb: Add with/use clauses for System.Img_LFlt
        and System.Val_LFlt.  Remove the one for System.Val_LLF.  Replace
        Long_Long_Float with Long_Float throughout.
        * libgnat/a-ztfiio__128.adb: Likewise.
        * libgnat/a-ztflau.ads: Add Set_Image formal parameter.
        * libgnat/a-ztflau.adb: Add with/use clause for System.Img_Util,
        remove the one for System.Img_Real.
        (Put): Call Set_Image instead of Set_Image_Real.
        (Puts): Likewise.
        * libgnat/a-ztflio.adb: Add with/use clause for System.Img_Flt,
        System.Img_LFlt and System.Img_LLF.
        (Aux_Float): Add third actual parameter.
        (Aux_Long_Float): Likewise.
        (Aux_Long_Long_Float): Likewise.
        * libgnat/s-dorepr.adb: New file.
        * libgnat/s-dorepr__fma.adb: Likewise.
        * libgnat/s-dourea.ads: Likewise.
        * libgnat/s-dourea.adb: Likewise.
        * libgnat/s-forrea.ads (Fore_Real): Rename into...
        (Fore_Fixed): ...this and take Long_Float parameters.
        * libgnat/s-forrea.adb (Fore_Real): Likewise.
        (Fore_Fixed): Likewise.
        * libgnat/s-imgrea.ads: Move to...
        (Set_Image_Real): Turn into mere renaming.
        * libgnat/s-imager.ads: ...here.
        (Image_Ordinary_Fixed_Point): Turn into...
        (Image_Fixed_Point): ...this.
        * libgnat/s-imgrea.adb: Add pragma No_Body.  Move to...
        * libgnat/s-imager.adb: ...here.
        (Image_Ordinary_Fixed_Point): Turn into...
        (Image_Fixed_Point): ...this.
        (Is_Negative): Replace Long_Long_Float with Num.
        (Set_Image_Real): Likewise.  Use Double_T instead of single Num
        throughout the algorithm.
        * libgnat/s-imgflt.ads: New file.
        * libgnat/s-imglfl.ads: Likewise.
        * libgnat/s-imgllf.ads: Likewise.
        * libgnat/s-imagef.ads: Adjust comment.
        * libgnat/s-imguti.ads (Max_Real_Image_Length): New named number.
        * libgnat/s-powflt.ads (Maxpow): Adjust.
        (Powten): Turn into an exact table of double Float.
        * libgnat/s-powlfl.ads (Maxpow): Adjust.
        (Powten): Turn into an exact table of double Long_Float.
        * libgnat/s-powllf.ads (Maxpow): Adjust.
        (Powten): Turn into an exact table of double Long_Long_Float.
        * libgnat/s-valrea.ads: Change order of formal parameters.
        * libgnat/s-valrea.adb: Add with clause for System.Double_Real.
        (Double_Real): New instantiation.
        (Fast2Sum): Delete.
        (Large_Powten): New function.
        (Integer_to_Real): Use Quick_Two_Sum instead of Fast2Sum.  Convert
        the value to Double_T.  Do the scaling in Double_T for base 10.
        * libgnat/s-valflt.ads: Remove with/use clasue for Interfaces,
        add it for System.Unsigned_Types.  Use Unsigned.
        * libgnat/s-vallfl.ads: Remove with/use clasue for Interfaces,
        add it for System.Unsigned_Types.  Use Long_Unsigned.
        * libgnat/s-valllf.ads: Remove with/use clasue for Interfaces,
        add it for System.Unsigned_Types.  Use Long_Long_Unsigned.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * sem_eval.adb (Eval_Arithmetic_Op): Call
        Set_Raises_Constraint_Error on real division by zero just like
        it is called for integer division by zero earlier in this
        routine.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * freeze.adb (Build_Renamed_Body): Simplify IF and WHILE
        statements with the same condition.

2021-05-05  Piotr Trojanek  <trojanek@adacore.com>

        * pprint.adb (Expr_Name): Introduce local constants to make the
        code more readable and avoid repeated calls to Next to reach the
        ELSE part of an if-expression.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * pprint.adb: Remove qualification of arbitrary calls to
        Sinfo.Expressions and Sinfo.Parameter_Associations.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * pprint.adb (Expr_Name): Simplify with functional variant of
        UI_Image.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * pprint.adb (To_Mixed): Removed.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * pprint.adb (List_Name_Count): Change type from Integer to
        Natural.

2021-05-04  Yannick Moy  <moy@adacore.com>

        * pprint.adb (Expression_Image): Special case for
        expression-with-actions.

2021-05-04  Bob Duff  <duff@adacore.com>

        * exp_ch4.adb (Expand_Concatenate): Remove the non-optimization.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * lib-xref.adb (Generate_Reference_To_Formals): Remove dedicated
        branch for generic subprograms (they are now handled together
        with non-generic subprograms in the ELSE branch); replace a
        low-level Ekind membership test with a high-level call to
        Is_Access_Subprogram_Type.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch12.adb (Check_Abstract_Primitives): Match First_Formal
        with Next_Formal.
        * sem_ch6.adb (Is_Non_Overriding_Operation): Likewise.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Collect_Global_Item): Iterate directly over
        formals.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.ads (Collect_Subprogram_Inputs_Outputs): Update
        comment; this routine is no longer used by GNATprove.
        * sem_prag.adb (Find_Role): The IN parameter is on output only
        when it belongs to non-function; also, the otherwise constant
        object can only be written by a non-function.
        (Collect_Global_Item): The IN parameter can only be written when
        it belongs to non-function; also, unnest this check to make it
        easier to read.

2021-05-04  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/s-assert.ads (Assert_Failure): Now a renaming of
        Assertion_Error.
        * libgnat/a-assert.ads (Assertion_Error): Now a first class
        citizen.  Remove dependency on System.Assertions.
        * gcc-interface/a-assert.ads, gcc-interface/a-assert.adb: New.
        * gcc-interface/Make-lang.in (GNAT_ADA_OBJS, GNATBIND_OBJS): Add
        a-assert.o from gcc-interface.

2021-05-04  Yannick Moy  <moy@adacore.com>

        * erroutc.adb (Matches): Move spec...
        * erroutc.ads (Matches): ...here.

2021-05-04  Yannick Moy  <moy@adacore.com>

        * gnat1drv.adb (Adjust_Global_Switches): Force error marker in
        GNATprove mode.

2021-05-04  Bob Duff  <duff@adacore.com>

        * binde.adb: No need for ??? marks in Binde, because it is
        superseded by Bindo.
        * bindo-writers.adb (Write_Unit_Closure): Verified that -Ra
        works.
        * exp_ch4.adb, sinfo.ads (Expand_N_Type_Conversion): Rules for
        conversions passed to gigi are documented in sinfo.ads.
        (Expand_N_Unchecked_Type_Conversion): Comment is a duplicate of
        one in sinfo.ads.
        (Expand_N_In): Robert already added sufficient comments years
        after the ??? comment was inserted.
        (Expand_Membership_Minimize_Eliminate_Overflow): I don't see any
        reason why Stand should export Long_Long_Integer'Base -- it
        doesn't export any other base types.
        (Size_In_Storage_Elements): We are doing an allocator, so we
        don't care about sizes in bits.
        (Expand_N_Allocator): PolyORB isn't going to be significantly
        improved, so we're not going to mess with remote access to
        class-wide types.
        (Optimize_Return_Stmt): It's not important to optimize return
        statements in predicate functions -- there are many
        more-important optimizations we could do. Keep part of the
        comment without "???", to clarify why the "and then ...".
        (User_Defined_Primitive_Equality_Op): The optimization doesn't
        seem important enough.
        (Expand_N_Unchecked_Type_Conversion): Refactor to use
        Expand_N_Unchecked_Expression.
        (Make_Array_Comparison_Op): This seems like a case of "it it's
        not broken, don't fix it". Too much risk of causing bugs.
        * debug_a.adb: Remove ??? comments asking why Current_Error_Node
        is maintained unconditionally, and add a comment explaining why.
        * errout.adb: These kinds of minor bugs do indeed exist, but
        we're never going to get around to fixing them "properly", so we
        need this code for robustness.
        * gnatchop.adb (Read_File): Document when read can fail.
        * gnatdll.adb (Parse_Command_Line): Nobody is complaining about
        these arbitrary limits, so no need to use Table. Increase the
        limits just in case.  It is clear from the names what they are
        limits on.
        * gnatlink.adb: Add needed comments.
        (Delete): An existing comment makes clear it's intentional, and
        it's been like that since 1996.
        (Process_Args): Improve comments.
        (Search_Library_Path): Refactoring to avoid deep nesting.
        * inline.adb (Build_Body_To_Inline): Probably won't get around
        to doing that optimization.
        (Is_Unit_Subprogram): No, this should not be moved to Sem_Aux,
        because it is too specialized to this context.
        (Do_Reset): No comment is needed here; it's clear from the
        comment on Reset_Dispatching_Calls. Do_Reset is an artificial
        subprogram; if we had proper iterators, it would just be an if
        statement in the loop.
        (Rewrite_Function_Call): Probably won't get around to doing that
        optimization.
        * layout.adb (Layout_Type): The gigi comment doesn't need to be
        a ??? comment, and it's been that way since 2000.  The
        limitation to scalars will likely never be investigated, and
        it's been that way since 2009.
        * lib.adb (Check_Same_Extended_Unit): This doesn't look like
        something that needs fixing; it looks like a permanent
        workaround.
        * lib-load.adb (Change_Main_Unit_To_Spec): It is good enough in
        practice.
        (Load_Unit): Nobody will ever get around to investigating the
        obscure PMES oddity, and the optimization is not worth the
        trouble.
        * live.adb: It's not worth documenting this. It is used only
        with a debug switch. Nobody who has done significant work on it
        is still around, so it would require substantial investigation.
        * mdll.ads: I see no reason for USE.
        * namet.ads: Routines are obsolete, but they're not going
        anywhere anytime soon (too much work, and surprisingly delicate
        because of dependences on global variables).
        * osint.ads: Minor.
        * osint.adb: Improve comments.
        (Full_Lib_File_Name): Use Smart_Find_File.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * exp_prag.adb, sem_prag.adb: Replace low-level Ekind membership
        tests with a high-level call to Is_Formal_Object.

2021-05-04  Arnaud Charlet  <charlet@adacore.com>

        * cstand.adb, sprint.adb, switch-c.adb, xr_tabls.ads,
        xr_tabls.adb, xref_lib.adb: Address ??? comments.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Analyze_Global_Item): Take subprogram kind into
        account when accepting or rejecting a constant of an
        access-to-variable type as a global Output/In_Out; do this check
        inside an ELSIF branch to avoid unnecessary evaluation of the
        subsequent condition.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Role_Error, Usage_Error): Replace calls to
        Name_Find and Get_Name_String with a call to To_String.

2021-05-04  Ed Schonberg  <schonberg@adacore.com>

        * exp_aggr.adb (Build_Siz_Exp): new function, subsidiary of
        Expand_Container_Aggregate, to create an expression to be used
        in the dynamic allocation of a container with a single container
        element association.
        (Add_Range): Handle static bounds of ranges over enumerations.
        (Expand_Container_Aggregate): Add declaration for size
        expression when needed, and use it in container object
        declaration for container.

2021-05-04  Arnaud Charlet  <charlet@adacore.com>

        * exp_ch7.adb (Build_Finalizer_Helper.New_Finalizer_Name):
        Unnest so that it can be reused.
        (Build_Finalizer_Helper.Process_Declarations): Call the
        xxx__finalize_body procedure of a package instantiation in case
        it contains finalization statements.  Code clean ups.
        (Build_Finalizer_Helper.Create_Finalizer): Export and set an
        Interface_Name for library level finalizers since these may be
        imported now.
        (Build_Finalizer_Helper): Need to process library level package
        body instantiations which may contain objects requiring
        finalization.
        * libgnat/s-finmas.ads: Fix typo.

2021-05-04  Arnaud Charlet  <charlet@adacore.com>

        * checks.adb (Append_Range_Checks, Apply_Selected_Length_Checks,
        Determine_Range, Insert_Range_Checks,
        Install_Null_Excluding_Check, Selected_Length_Checks,
        Selected_Range_Checks): Address ??? comments and code cleanups.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Check_Mode_Restriction_In_Enclosing_Context):
        Apply the rule even with no explicit Global contract (and remove
        a dead condition for Refined_Global).

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Check_Mode_Restriction_In_Enclosing_Context):
        Extend check to protected entries.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * sem_prag.adb (Check_Mode_Restriction_In_Enclosing_Context):
        Fix reference to SPARK RM rule number.

2021-05-04  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_intr.adb: Remove with/use clauses for Urealp.
        (Expand_Is_Negative): Delete.
        (Expand_Intrinsic_Call): Do not call it.
        * rtsfind.ads (RE_Id): Remove RE_Float_Unsigned.
        (RE_Unit_Table): Remove entry for RE_Float_Unsigned.
        * snames.ads-tmpl (Name_Is_Negative): Delete.
        * libgnat/s-imgrea.ads (Set_Image_Real): Fix mode of S parameter.
        * libgnat/s-imgrea.adb: Add with/use clauses for System.Img_Util.
        (LLU): New subtype.
        (Maxdigs): Use it.
        (Is_Negative): Reimplement.
        (Image_Floating_Point): Simplify.
        (Set_Image_Real): Fix mode of S parameter.  Remove the low-level
        processing on characters.  Flip the sign of the Scale variable.
        Compute the maximum number of digits for the straight notation.
        Call Set_Decimal_Digits at the end to do the final formatting.
        * libgnat/s-imguti.ads (Floating_Invalid_Value): New type.
        (Set_Floating_Invalid_Value): New procedure.
        * libgnat/s-imguti.adb (Set_Floating_Invalid_Value): Implement it
        based on existing code from Set_Image_Real.
        * libgnat/s-unstyp.ads (Float_Unsigned): Delete.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * csets.adb (Initialize): Refactor into CASE statement; raise
        exception on unsupported code of character set (it will be
        gently rejected earlier when scanning command line switches).
        * switch-b.adb (Scan_Binder_Switches): Refactor into a
        membership expression; add missing '9' choice; reorder as
        described by GNAT UG, section 4.3.11.
        * switch-c.adb (Scan_Front_End_Switches): Refactor into a
        membership expression and reorder as above.
        * doc/gnat_ugn/building_executable_programs_with_gnat.rst
        (gnatic): Mention '5' as an allowed value for "c".
        * gnat_ugn.texi: Regenerate.

2021-05-04  Piotr Trojanek  <trojanek@adacore.com>

        * errout.adb (Error_Msg_Internal): Add assertion to prevent
        style mistakes reappearing in the future.

2021-05-04  Javier Miranda  <miranda@adacore.com>

        * exp_ch4.adb (Tagged_Membership): Remove wrong condition that
        is not consistent with the documentation of this subprogram.

2021-05-04  Yannick Moy  <moy@adacore.com>

        * sem_res.adb (Valid_Conversion): Make message a continuation.

2021-05-04  Arnaud Charlet  <charlet@adacore.com>

        * styleg.adb: Address ??? comments.

2021-05-03  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/a-stunau.ads, libgnat/a-stunau.adb,
        libgnat/a-stunau__shared.adb (Set_String): Remove old version,
        replace by a new version taking a callback to set the string.

2021-05-03  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/a-coorma.ads (Map): Add missing
        Preelaborate_Initialization.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch4.adb (Analyze_Number_Declaration, Expand_N_Op_Expon):
        Simplify with Is_Universal_Numeric_Type.
        * sem_attr.adb (Resolve_Attribute): Likewise.
        * sem_ch3.adb: Likewise.
        * sem_ch4.adb (Check_Common_Type, Check_Arithmetic_Pair):
        Likewise.
        * sem_eval.adb (Eval_Unary_Op, Test_In_Range): Likewise.
        * sem_res.adb (Resolve_Arithmetic_Op, Resolve_Membership_Op,
        Resolve_Op_Expon, Resolve_Unary_Op, Set_Mixed_Mode_Operand,
        Set_Operand_Type): Likewise.
        * sem_type.adb (Disambiguate, Find_Unique_Type): Likewise.
        * sem_util.adb (Universal_Interpretation): Likewise.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * exp_aggr.adb (Max_Aggregate_Size): Add header boxes for nested
        routines; move a local constant after nested subprogram bodies;
        refill comment.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * sem_attr.adb (Analyze_Attribute): Reuse Resolve with implicit
        type when analysing attribute Priority.
        * sem_ch5.adb (Analyze_Case_Statement): Likewise for a rare case
        in analysis of case statements.
        (Analyze_Iterator_Specification): Likewise for non-overloaded
        domain of iteration.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * einfo.adb (Write_Entity_Info): Simplify an Ekind membership
        test.
        * exp_aggr.adb (Is_CCG_Supported_Aggregate): Likewise.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch7.adb (Build_Finalize_Statements): Refine type of a
        local counter variable.
        * exp_dist.adb (Append_Record_Traversal): Refine type of Counter
        parameter.
        (Add_Process_Element): Likewise.
        (Build_From_Any_Call): Refine type of a local counter variable.
        (Build_From_Any_Function): Likewise.
        (Build_To_Any_Function): Likewise.
        (FA_Rec_Add_Process_Element): Likewise.
        (TA_Append_Record_Traversal): Likewise.
        (TA_Rec_Add_Process_Element): Likewise.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * rtsfind.adb (SPARK_Implicit_Load): Simplify with Discard_Node.

2021-05-03  Arnaud Charlet  <charlet@adacore.com>

        * Makefile.rtl: Update copyright notice.
        * ada_get_targ.adb: Likewise.
        * adabkend.adb: Likewise.
        * adabkend.ads: Likewise.
        * adadecode.c: Likewise.
        * adadecode.h: Likewise.
        * adaint.c: Likewise.
        * adaint.h: Likewise.
        * affinity.c: Likewise.
        * ali-util.adb: Likewise.
        * ali-util.ads: Likewise.
        * ali.adb: Likewise.
        * ali.ads: Likewise.
        * alloc.ads: Likewise.
        * argv-lynxos178-raven-cert.c: Likewise.
        * argv.c: Likewise.
        * aspects.adb: Likewise.
        * aspects.ads: Likewise.
        * atree.adb: Likewise.
        * atree.ads: Likewise.
        * atree.h: Likewise.
        * aux-io.c: Likewise.
        * back_end.adb: Likewise.
        * back_end.ads: Likewise.
        * bcheck.adb: Likewise.
        * bcheck.ads: Likewise.
        * binde.adb: Likewise.
        * binde.ads: Likewise.
        * binderr.adb: Likewise.
        * binderr.ads: Likewise.
        * bindgen.adb: Likewise.
        * bindgen.ads: Likewise.
        * bindo-augmentors.adb: Likewise.
        * bindo-augmentors.ads: Likewise.
        * bindo-builders.adb: Likewise.
        * bindo-builders.ads: Likewise.
        * bindo-diagnostics.adb: Likewise.
        * bindo-diagnostics.ads: Likewise.
        * bindo-elaborators.adb: Likewise.
        * bindo-elaborators.ads: Likewise.
        * bindo-graphs.adb: Likewise.
        * bindo-graphs.ads: Likewise.
        * bindo-units.adb: Likewise.
        * bindo-units.ads: Likewise.
        * bindo-validators.adb: Likewise.
        * bindo-validators.ads: Likewise.
        * bindo-writers.adb: Likewise.
        * bindo-writers.ads: Likewise.
        * bindo.adb: Likewise.
        * bindo.ads: Likewise.
        * bindusg.adb: Likewise.
        * bindusg.ads: Likewise.
        * butil.adb: Likewise.
        * butil.ads: Likewise.
        * cal.c: Likewise.
        * casing.adb: Likewise.
        * casing.ads: Likewise.
        * ceinfo.adb: Likewise.
        * checks.adb: Likewise.
        * checks.ads: Likewise.
        * cio.c: Likewise.
        * clean.adb: Likewise.
        * clean.ads: Likewise.
        * comperr.adb: Likewise.
        * comperr.ads: Likewise.
        * contracts.adb: Likewise.
        * contracts.ads: Likewise.
        * csets.adb: Likewise.
        * csets.ads: Likewise.
        * csinfo.adb: Likewise.
        * cstand.adb: Likewise.
        * cstand.ads: Likewise.
        * cstreams.c: Likewise.
        * ctrl_c.c: Likewise.
        * debug.adb: Likewise.
        * debug.ads: Likewise.
        * debug_a.adb: Likewise.
        * debug_a.ads: Likewise.
        * einfo.adb: Likewise.
        * einfo.ads: Likewise.
        * elists.adb: Likewise.
        * elists.ads: Likewise.
        * elists.h: Likewise.
        * env.c: Likewise.
        * env.h: Likewise.
        * err_vars.ads: Likewise.
        * errno.c: Likewise.
        * errout.adb: Likewise.
        * errout.ads: Likewise.
        * erroutc.adb: Likewise.
        * erroutc.ads: Likewise.
        * errutil.adb: Likewise.
        * errutil.ads: Likewise.
        * eval_fat.adb: Likewise.
        * eval_fat.ads: Likewise.
        * exit.c: Likewise.
        * exp_aggr.adb: Likewise.
        * exp_aggr.ads: Likewise.
        * exp_atag.adb: Likewise.
        * exp_atag.ads: Likewise.
        * exp_attr.adb: Likewise.
        * exp_attr.ads: Likewise.
        * exp_cg.adb: Likewise.
        * exp_cg.ads: Likewise.
        * exp_ch10.ads: Likewise.
        * exp_ch11.adb: Likewise.
        * exp_ch11.ads: Likewise.
        * exp_ch12.adb: Likewise.
        * exp_ch12.ads: Likewise.
        * exp_ch13.adb: Likewise.
        * exp_ch13.ads: Likewise.
        * exp_ch2.adb: Likewise.
        * exp_ch2.ads: Likewise.
        * exp_ch3.adb: Likewise.
        * exp_ch3.ads: Likewise.
        * exp_ch4.adb: Likewise.
        * exp_ch4.ads: Likewise.
        * exp_ch5.adb: Likewise.
        * exp_ch5.ads: Likewise.
        * exp_ch6.adb: Likewise.
        * exp_ch6.ads: Likewise.
        * exp_ch7.adb: Likewise.
        * exp_ch7.ads: Likewise.
        * exp_ch8.adb: Likewise.
        * exp_ch8.ads: Likewise.
        * exp_ch9.adb: Likewise.
        * exp_ch9.ads: Likewise.
        * exp_code.adb: Likewise.
        * exp_code.ads: Likewise.
        * exp_dbug.adb: Likewise.
        * exp_dbug.ads: Likewise.
        * exp_disp.adb: Likewise.
        * exp_disp.ads: Likewise.
        * exp_dist.adb: Likewise.
        * exp_dist.ads: Likewise.
        * exp_fixd.adb: Likewise.
        * exp_fixd.ads: Likewise.
        * exp_imgv.adb: Likewise.
        * exp_imgv.ads: Likewise.
        * exp_intr.adb: Likewise.
        * exp_intr.ads: Likewise.
        * exp_pakd.adb: Likewise.
        * exp_pakd.ads: Likewise.
        * exp_prag.adb: Likewise.
        * exp_prag.ads: Likewise.
        * exp_put_image.adb: Likewise.
        * exp_put_image.ads: Likewise.
        * exp_sel.adb: Likewise.
        * exp_sel.ads: Likewise.
        * exp_smem.adb: Likewise.
        * exp_smem.ads: Likewise.
        * exp_spark.adb: Likewise.
        * exp_spark.ads: Likewise.
        * exp_strm.adb: Likewise.
        * exp_strm.ads: Likewise.
        * exp_tss.adb: Likewise.
        * exp_tss.ads: Likewise.
        * exp_unst.adb: Likewise.
        * exp_unst.ads: Likewise.
        * exp_util.adb: Likewise.
        * exp_util.ads: Likewise.
        * expander.adb: Likewise.
        * expander.ads: Likewise.
        * expect.c: Likewise.
        * fe.h: Likewise.
        * final.c: Likewise.
        * fmap.adb: Likewise.
        * fmap.ads: Likewise.
        * fname-sf.adb: Likewise.
        * fname-sf.ads: Likewise.
        * fname-uf.adb: Likewise.
        * fname-uf.ads: Likewise.
        * fname.adb: Likewise.
        * fname.ads: Likewise.
        * freeze.adb: Likewise.
        * freeze.ads: Likewise.
        * frontend.adb: Likewise.
        * frontend.ads: Likewise.
        * gcc-interface/ada-tree.h: Likewise.
        * gcc-interface/ada.h: Likewise.
        * gcc-interface/cuintp.c: Likewise.
        * gcc-interface/decl.c: Likewise.
        * gcc-interface/gadaint.h: Likewise.
        * gcc-interface/gigi.h: Likewise.
        * gcc-interface/lang-specs.h: Likewise.
        * gcc-interface/misc.c: Likewise.
        * gcc-interface/system.ads: Likewise.
        * gcc-interface/targtyps.c: Likewise.
        * gcc-interface/trans.c: Likewise.
        * gcc-interface/utils.c: Likewise.
        * gcc-interface/utils2.c: Likewise.
        * get_scos.adb: Likewise.
        * get_scos.ads: Likewise.
        * get_targ.adb: Likewise.
        * get_targ.ads: Likewise.
        * ghost.adb: Likewise.
        * ghost.ads: Likewise.
        * gnat1drv.adb: Likewise.
        * gnat1drv.ads: Likewise.
        * gnat_cuda.adb: Likewise.
        * gnat_cuda.ads: Likewise.
        * gnatbind.adb: Likewise.
        * gnatbind.ads: Likewise.
        * gnatchop.adb: Likewise.
        * gnatclean.adb: Likewise.
        * gnatcmd.adb: Likewise.
        * gnatcmd.ads: Likewise.
        * gnatdll.adb: Likewise.
        * gnatfind.adb: Likewise.
        * gnatkr.adb: Likewise.
        * gnatkr.ads: Likewise.
        * gnatlink.adb: Likewise.
        * gnatlink.ads: Likewise.
        * gnatls.adb: Likewise.
        * gnatls.ads: Likewise.
        * gnatmake.adb: Likewise.
        * gnatmake.ads: Likewise.
        * gnatname.adb: Likewise.
        * gnatname.ads: Likewise.
        * gnatprep.adb: Likewise.
        * gnatprep.ads: Likewise.
        * gnatvsn.adb: Likewise.
        * gnatvsn.ads: Likewise.
        * gnatxref.adb: Likewise.
        * gprep.adb: Likewise.
        * gprep.ads: Likewise.
        * gsocket.h: Likewise.
        * hostparm.ads: Likewise.
        * impunit.adb: Likewise.
        * impunit.ads: Likewise.
        * indepsw-aix.adb: Likewise.
        * indepsw-darwin.adb: Likewise.
        * indepsw-gnu.adb: Likewise.
        * indepsw.adb: Likewise.
        * indepsw.ads: Likewise.
        * init.c: Likewise.
        * initialize.c: Likewise.
        * inline.adb: Likewise.
        * inline.ads: Likewise.
        * itypes.adb: Likewise.
        * itypes.ads: Likewise.
        * krunch.adb: Likewise.
        * krunch.ads: Likewise.
        * layout.adb: Likewise.
        * layout.ads: Likewise.
        * lib-list.adb: Likewise.
        * lib-load.adb: Likewise.
        * lib-load.ads: Likewise.
        * lib-sort.adb: Likewise.
        * lib-util.adb: Likewise.
        * lib-util.ads: Likewise.
        * lib-writ.adb: Likewise.
        * lib-writ.ads: Likewise.
        * lib-xref-spark_specific.adb: Likewise.
        * lib-xref.adb: Likewise.
        * lib-xref.ads: Likewise.
        * lib.adb: Likewise.
        * lib.ads: Likewise.
        * libgnarl/a-astaco.adb: Likewise.
        * libgnarl/a-dispat.adb: Likewise.
        * libgnarl/a-dynpri.adb: Likewise.
        * libgnarl/a-etgrbu.ads: Likewise.
        * libgnarl/a-exetim__darwin.adb: Likewise.
        * libgnarl/a-exetim__default.ads: Likewise.
        * libgnarl/a-exetim__mingw.adb: Likewise.
        * libgnarl/a-exetim__mingw.ads: Likewise.
        * libgnarl/a-exetim__posix.adb: Likewise.
        * libgnarl/a-interr.adb: Likewise.
        * libgnarl/a-interr.ads: Likewise.
        * libgnarl/a-intnam.ads: Likewise.
        * libgnarl/a-intnam__aix.ads: Likewise.
        * libgnarl/a-intnam__darwin.ads: Likewise.
        * libgnarl/a-intnam__dragonfly.ads: Likewise.
        * libgnarl/a-intnam__dummy.ads: Likewise.
        * libgnarl/a-intnam__freebsd.ads: Likewise.
        * libgnarl/a-intnam__hpux.ads: Likewise.
        * libgnarl/a-intnam__linux.ads: Likewise.
        * libgnarl/a-intnam__lynxos.ads: Likewise.
        * libgnarl/a-intnam__mingw.ads: Likewise.
        * libgnarl/a-intnam__qnx.ads: Likewise.
        * libgnarl/a-intnam__rtems.ads: Likewise.
        * libgnarl/a-intnam__solaris.ads: Likewise.
        * libgnarl/a-intnam__vxworks.ads: Likewise.
        * libgnarl/a-reatim.adb: Likewise.
        * libgnarl/a-reatim.ads: Likewise.
        * libgnarl/a-retide.adb: Likewise.
        * libgnarl/a-retide.ads: Likewise.
        * libgnarl/a-rttiev.adb: Likewise.
        * libgnarl/a-rttiev.ads: Likewise.
        * libgnarl/a-synbar.adb: Likewise.
        * libgnarl/a-synbar.ads: Likewise.
        * libgnarl/a-synbar__posix.adb: Likewise.
        * libgnarl/a-synbar__posix.ads: Likewise.
        * libgnarl/a-sytaco.adb: Likewise.
        * libgnarl/a-sytaco.ads: Likewise.
        * libgnarl/a-tasatt.adb: Likewise.
        * libgnarl/a-tasatt.ads: Likewise.
        * libgnarl/a-taside.adb: Likewise.
        * libgnarl/a-taside.ads: Likewise.
        * libgnarl/a-tasini.adb: Likewise.
        * libgnarl/a-tasini.ads: Likewise.
        * libgnarl/a-taster.adb: Likewise.
        * libgnarl/g-boubuf.adb: Likewise.
        * libgnarl/g-boubuf.ads: Likewise.
        * libgnarl/g-boumai.ads: Likewise.
        * libgnarl/g-semaph.adb: Likewise.
        * libgnarl/g-semaph.ads: Likewise.
        * libgnarl/g-signal.adb: Likewise.
        * libgnarl/g-signal.ads: Likewise.
        * libgnarl/g-tastus.ads: Likewise.
        * libgnarl/g-thread.adb: Likewise.
        * libgnarl/g-thread.ads: Likewise.
        * libgnarl/i-vxinco.adb: Likewise.
        * libgnarl/i-vxinco.ads: Likewise.
        * libgnarl/s-inmaop.ads: Likewise.
        * libgnarl/s-inmaop__dummy.adb: Likewise.
        * libgnarl/s-inmaop__posix.adb: Likewise.
        * libgnarl/s-inmaop__vxworks.adb: Likewise.
        * libgnarl/s-interr.adb: Likewise.
        * libgnarl/s-interr.ads: Likewise.
        * libgnarl/s-interr__dummy.adb: Likewise.
        * libgnarl/s-interr__hwint.adb: Likewise.
        * libgnarl/s-interr__sigaction.adb: Likewise.
        * libgnarl/s-interr__vxworks.adb: Likewise.
        * libgnarl/s-intman.ads: Likewise.
        * libgnarl/s-intman__android.adb: Likewise.
        * libgnarl/s-intman__dummy.adb: Likewise.
        * libgnarl/s-intman__lynxos.adb: Likewise.
        * libgnarl/s-intman__mingw.adb: Likewise.
        * libgnarl/s-intman__posix.adb: Likewise.
        * libgnarl/s-intman__qnx.adb: Likewise.
        * libgnarl/s-intman__solaris.adb: Likewise.
        * libgnarl/s-intman__susv3.adb: Likewise.
        * libgnarl/s-intman__vxworks.adb: Likewise.
        * libgnarl/s-intman__vxworks.ads: Likewise.
        * libgnarl/s-linux.ads: Likewise.
        * libgnarl/s-linux__alpha.ads: Likewise.
        * libgnarl/s-linux__android.ads: Likewise.
        * libgnarl/s-linux__hppa.ads: Likewise.
        * libgnarl/s-linux__mips.ads: Likewise.
        * libgnarl/s-linux__riscv.ads: Likewise.
        * libgnarl/s-linux__sparc.ads: Likewise.
        * libgnarl/s-linux__x32.ads: Likewise.
        * libgnarl/s-mudido.adb: Likewise.
        * libgnarl/s-mudido__affinity.adb: Likewise.
        * libgnarl/s-osinte__aix.adb: Likewise.
        * libgnarl/s-osinte__aix.ads: Likewise.
        * libgnarl/s-osinte__android.adb: Likewise.
        * libgnarl/s-osinte__android.ads: Likewise.
        * libgnarl/s-osinte__darwin.adb: Likewise.
        * libgnarl/s-osinte__darwin.ads: Likewise.
        * libgnarl/s-osinte__dragonfly.adb: Likewise.
        * libgnarl/s-osinte__dragonfly.ads: Likewise.
        * libgnarl/s-osinte__dummy.ads: Likewise.
        * libgnarl/s-osinte__freebsd.adb: Likewise.
        * libgnarl/s-osinte__freebsd.ads: Likewise.
        * libgnarl/s-osinte__gnu.adb: Likewise.
        * libgnarl/s-osinte__gnu.ads: Likewise.
        * libgnarl/s-osinte__hpux-dce.adb: Likewise.
        * libgnarl/s-osinte__hpux-dce.ads: Likewise.
        * libgnarl/s-osinte__hpux.ads: Likewise.
        * libgnarl/s-osinte__kfreebsd-gnu.ads: Likewise.
        * libgnarl/s-osinte__linux.ads: Likewise.
        * libgnarl/s-osinte__lynxos178.adb: Likewise.
        * libgnarl/s-osinte__lynxos178e.ads: Likewise.
        * libgnarl/s-osinte__mingw.ads: Likewise.
        * libgnarl/s-osinte__posix.adb: Likewise.
        * libgnarl/s-osinte__qnx.adb: Likewise.
        * libgnarl/s-osinte__qnx.ads: Likewise.
        * libgnarl/s-osinte__rtems.adb: Likewise.
        * libgnarl/s-osinte__rtems.ads: Likewise.
        * libgnarl/s-osinte__solaris.adb: Likewise.
        * libgnarl/s-osinte__solaris.ads: Likewise.
        * libgnarl/s-osinte__vxworks.adb: Likewise.
        * libgnarl/s-osinte__vxworks.ads: Likewise.
        * libgnarl/s-osinte__x32.adb: Likewise.
        * libgnarl/s-proinf.adb: Likewise.
        * libgnarl/s-proinf.ads: Likewise.
        * libgnarl/s-qnx.ads: Likewise.
        * libgnarl/s-solita.adb: Likewise.
        * libgnarl/s-solita.ads: Likewise.
        * libgnarl/s-stusta.adb: Likewise.
        * libgnarl/s-stusta.ads: Likewise.
        * libgnarl/s-taasde.adb: Likewise.
        * libgnarl/s-taasde.ads: Likewise.
        * libgnarl/s-tadeca.adb: Likewise.
        * libgnarl/s-tadeca.ads: Likewise.
        * libgnarl/s-tadert.adb: Likewise.
        * libgnarl/s-tadert.ads: Likewise.
        * libgnarl/s-taenca.adb: Likewise.
        * libgnarl/s-taenca.ads: Likewise.
        * libgnarl/s-taprob.adb: Likewise.
        * libgnarl/s-taprob.ads: Likewise.
        * libgnarl/s-taprop.ads: Likewise.
        * libgnarl/s-taprop__dummy.adb: Likewise.
        * libgnarl/s-taprop__hpux-dce.adb: Likewise.
        * libgnarl/s-taprop__linux.adb: Likewise.
        * libgnarl/s-taprop__mingw.adb: Likewise.
        * libgnarl/s-taprop__posix.adb: Likewise.
        * libgnarl/s-taprop__qnx.adb: Likewise.
        * libgnarl/s-taprop__solaris.adb: Likewise.
        * libgnarl/s-taprop__vxworks.adb: Likewise.
        * libgnarl/s-tarest.adb: Likewise.
        * libgnarl/s-tarest.ads: Likewise.
        * libgnarl/s-tasdeb.adb: Likewise.
        * libgnarl/s-tasdeb.ads: Likewise.
        * libgnarl/s-tasinf.adb: Likewise.
        * libgnarl/s-tasinf.ads: Likewise.
        * libgnarl/s-tasinf__linux.adb: Likewise.
        * libgnarl/s-tasinf__linux.ads: Likewise.
        * libgnarl/s-tasinf__mingw.adb: Likewise.
        * libgnarl/s-tasinf__mingw.ads: Likewise.
        * libgnarl/s-tasinf__solaris.adb: Likewise.
        * libgnarl/s-tasinf__solaris.ads: Likewise.
        * libgnarl/s-tasinf__vxworks.ads: Likewise.
        * libgnarl/s-tasini.adb: Likewise.
        * libgnarl/s-tasini.ads: Likewise.
        * libgnarl/s-taskin.adb: Likewise.
        * libgnarl/s-taskin.ads: Likewise.
        * libgnarl/s-taspri__dummy.ads: Likewise.
        * libgnarl/s-taspri__hpux-dce.ads: Likewise.
        * libgnarl/s-taspri__lynxos.ads: Likewise.
        * libgnarl/s-taspri__mingw.ads: Likewise.
        * libgnarl/s-taspri__posix-noaltstack.ads: Likewise.
        * libgnarl/s-taspri__posix.ads: Likewise.
        * libgnarl/s-taspri__solaris.ads: Likewise.
        * libgnarl/s-taspri__vxworks.ads: Likewise.
        * libgnarl/s-tasque.adb: Likewise.
        * libgnarl/s-tasque.ads: Likewise.
        * libgnarl/s-tasren.adb: Likewise.
        * libgnarl/s-tasren.ads: Likewise.
        * libgnarl/s-tasres.ads: Likewise.
        * libgnarl/s-tassta.adb: Likewise.
        * libgnarl/s-tassta.ads: Likewise.
        * libgnarl/s-tasuti.adb: Likewise.
        * libgnarl/s-tasuti.ads: Likewise.
        * libgnarl/s-tataat.adb: Likewise.
        * libgnarl/s-tataat.ads: Likewise.
        * libgnarl/s-tpinop.adb: Likewise.
        * libgnarl/s-tpinop.ads: Likewise.
        * libgnarl/s-tpoaal.adb: Likewise.
        * libgnarl/s-tpoben.adb: Likewise.
        * libgnarl/s-tpoben.ads: Likewise.
        * libgnarl/s-tpobmu.adb: Likewise.
        * libgnarl/s-tpobmu.ads: Likewise.
        * libgnarl/s-tpobop.adb: Likewise.
        * libgnarl/s-tpobop.ads: Likewise.
        * libgnarl/s-tpopmo.adb: Likewise.
        * libgnarl/s-tpopsp__posix-foreign.adb: Likewise.
        * libgnarl/s-tpopsp__posix.adb: Likewise.
        * libgnarl/s-tpopsp__solaris.adb: Likewise.
        * libgnarl/s-tpopsp__tls.adb: Likewise.
        * libgnarl/s-tpopsp__vxworks-rtp.adb: Likewise.
        * libgnarl/s-tpopsp__vxworks-tls.adb: Likewise.
        * libgnarl/s-tpopsp__vxworks.adb: Likewise.
        * libgnarl/s-tporft.adb: Likewise.
        * libgnarl/s-tposen.adb: Likewise.
        * libgnarl/s-tposen.ads: Likewise.
        * libgnarl/s-vxwext.adb: Likewise.
        * libgnarl/s-vxwext.ads: Likewise.
        * libgnarl/s-vxwext__kernel-smp.adb: Likewise.
        * libgnarl/s-vxwext__kernel.adb: Likewise.
        * libgnarl/s-vxwext__kernel.ads: Likewise.
        * libgnarl/s-vxwext__noints.adb: Likewise.
        * libgnarl/s-vxwext__rtp-smp.adb: Likewise.
        * libgnarl/s-vxwext__rtp.adb: Likewise.
        * libgnarl/s-vxwext__rtp.ads: Likewise.
        * libgnarl/s-vxwext__vthreads.ads: Likewise.
        * libgnarl/s-vxwork__aarch64.ads: Likewise.
        * libgnarl/s-vxwork__arm.ads: Likewise.
        * libgnarl/s-vxwork__ppc.ads: Likewise.
        * libgnarl/s-vxwork__x86.ads: Likewise.
        * libgnarl/thread.c: Likewise.
        * libgnat/a-assert.adb: Likewise.
        * libgnat/a-assert.ads: Likewise.
        * libgnat/a-btgbso.adb: Likewise.
        * libgnat/a-btgbso.ads: Likewise.
        * libgnat/a-calari.adb: Likewise.
        * libgnat/a-calari.ads: Likewise.
        * libgnat/a-calcon.adb: Likewise.
        * libgnat/a-calcon.ads: Likewise.
        * libgnat/a-caldel.adb: Likewise.
        * libgnat/a-caldel.ads: Likewise.
        * libgnat/a-calend.adb: Likewise.
        * libgnat/a-calend.ads: Likewise.
        * libgnat/a-calfor.adb: Likewise.
        * libgnat/a-calfor.ads: Likewise.
        * libgnat/a-catizo.adb: Likewise.
        * libgnat/a-cbdlli.adb: Likewise.
        * libgnat/a-cbdlli.ads: Likewise.
        * libgnat/a-cbhama.adb: Likewise.
        * libgnat/a-cbhama.ads: Likewise.
        * libgnat/a-cbhase.adb: Likewise.
        * libgnat/a-cbhase.ads: Likewise.
        * libgnat/a-cbmutr.adb: Likewise.
        * libgnat/a-cbmutr.ads: Likewise.
        * libgnat/a-cborma.adb: Likewise.
        * libgnat/a-cborma.ads: Likewise.
        * libgnat/a-cborse.adb: Likewise.
        * libgnat/a-cborse.ads: Likewise.
        * libgnat/a-cbprqu.adb: Likewise.
        * libgnat/a-cbprqu.ads: Likewise.
        * libgnat/a-cbsyqu.adb: Likewise.
        * libgnat/a-cbsyqu.ads: Likewise.
        * libgnat/a-cdlili.adb: Likewise.
        * libgnat/a-cdlili.ads: Likewise.
        * libgnat/a-cfdlli.adb: Likewise.
        * libgnat/a-cfdlli.ads: Likewise.
        * libgnat/a-cfhama.adb: Likewise.
        * libgnat/a-cfhama.ads: Likewise.
        * libgnat/a-cfhase.adb: Likewise.
        * libgnat/a-cfhase.ads: Likewise.
        * libgnat/a-cfinve.adb: Likewise.
        * libgnat/a-cfinve.ads: Likewise.
        * libgnat/a-cforma.adb: Likewise.
        * libgnat/a-cforma.ads: Likewise.
        * libgnat/a-cforse.adb: Likewise.
        * libgnat/a-cforse.ads: Likewise.
        * libgnat/a-cgaaso.adb: Likewise.
        * libgnat/a-cgaaso.ads: Likewise.
        * libgnat/a-cgarso.adb: Likewise.
        * libgnat/a-cgcaso.adb: Likewise.
        * libgnat/a-chacon.adb: Likewise.
        * libgnat/a-chacon.ads: Likewise.
        * libgnat/a-chahan.adb: Likewise.
        * libgnat/a-chahan.ads: Likewise.
        * libgnat/a-chlat9.ads: Likewise.
        * libgnat/a-chtgbk.adb: Likewise.
        * libgnat/a-chtgbk.ads: Likewise.
        * libgnat/a-chtgbo.adb: Likewise.
        * libgnat/a-chtgbo.ads: Likewise.
        * libgnat/a-chtgke.adb: Likewise.
        * libgnat/a-chtgke.ads: Likewise.
        * libgnat/a-chtgop.adb: Likewise.
        * libgnat/a-chtgop.ads: Likewise.
        * libgnat/a-chzla1.ads: Likewise.
        * libgnat/a-chzla9.ads: Likewise.
        * libgnat/a-cidlli.adb: Likewise.
        * libgnat/a-cidlli.ads: Likewise.
        * libgnat/a-cihama.adb: Likewise.
        * libgnat/a-cihama.ads: Likewise.
        * libgnat/a-cihase.adb: Likewise.
        * libgnat/a-cihase.ads: Likewise.
        * libgnat/a-cimutr.adb: Likewise.
        * libgnat/a-cimutr.ads: Likewise.
        * libgnat/a-ciorma.adb: Likewise.
        * libgnat/a-ciorma.ads: Likewise.
        * libgnat/a-ciormu.adb: Likewise.
        * libgnat/a-ciormu.ads: Likewise.
        * libgnat/a-ciorse.adb: Likewise.
        * libgnat/a-ciorse.ads: Likewise.
        * libgnat/a-clrefi.adb: Likewise.
        * libgnat/a-clrefi.ads: Likewise.
        * libgnat/a-coboho.adb: Likewise.
        * libgnat/a-coboho.ads: Likewise.
        * libgnat/a-cobove.adb: Likewise.
        * libgnat/a-cobove.ads: Likewise.
        * libgnat/a-cofove.adb: Likewise.
        * libgnat/a-cofove.ads: Likewise.
        * libgnat/a-cofuba.adb: Likewise.
        * libgnat/a-cofuba.ads: Likewise.
        * libgnat/a-cofuma.adb: Likewise.
        * libgnat/a-cofuma.ads: Likewise.
        * libgnat/a-cofuse.adb: Likewise.
        * libgnat/a-cofuse.ads: Likewise.
        * libgnat/a-cofuve.adb: Likewise.
        * libgnat/a-cofuve.ads: Likewise.
        * libgnat/a-cogeso.adb: Likewise.
        * libgnat/a-cogeso.ads: Likewise.
        * libgnat/a-cohama.adb: Likewise.
        * libgnat/a-cohama.ads: Likewise.
        * libgnat/a-cohase.adb: Likewise.
        * libgnat/a-cohase.ads: Likewise.
        * libgnat/a-cohata.ads: Likewise.
        * libgnat/a-coinho.adb: Likewise.
        * libgnat/a-coinho.ads: Likewise.
        * libgnat/a-coinho__shared.adb: Likewise.
        * libgnat/a-coinho__shared.ads: Likewise.
        * libgnat/a-coinve.adb: Likewise.
        * libgnat/a-coinve.ads: Likewise.
        * libgnat/a-colien.adb: Likewise.
        * libgnat/a-colien.ads: Likewise.
        * libgnat/a-colire.adb: Likewise.
        * libgnat/a-colire.ads: Likewise.
        * libgnat/a-comlin.adb: Likewise.
        * libgnat/a-comlin.ads: Likewise.
        * libgnat/a-comutr.adb: Likewise.
        * libgnat/a-comutr.ads: Likewise.
        * libgnat/a-conhel.adb: Likewise.
        * libgnat/a-conhel.ads: Likewise.
        * libgnat/a-convec.adb: Likewise.
        * libgnat/a-convec.ads: Likewise.
        * libgnat/a-coorma.adb: Likewise.
        * libgnat/a-coorma.ads: Likewise.
        * libgnat/a-coormu.adb: Likewise.
        * libgnat/a-coormu.ads: Likewise.
        * libgnat/a-coorse.adb: Likewise.
        * libgnat/a-coorse.ads: Likewise.
        * libgnat/a-coprnu.adb: Likewise.
        * libgnat/a-coprnu.ads: Likewise.
        * libgnat/a-crbltr.ads: Likewise.
        * libgnat/a-crbtgk.adb: Likewise.
        * libgnat/a-crbtgk.ads: Likewise.
        * libgnat/a-crbtgo.adb: Likewise.
        * libgnat/a-crbtgo.ads: Likewise.
        * libgnat/a-crdlli.adb: Likewise.
        * libgnat/a-crdlli.ads: Likewise.
        * libgnat/a-csquin.ads: Likewise.
        * libgnat/a-cuprqu.adb: Likewise.
        * libgnat/a-cuprqu.ads: Likewise.
        * libgnat/a-cusyqu.adb: Likewise.
        * libgnat/a-cusyqu.ads: Likewise.
        * libgnat/a-cwila1.ads: Likewise.
        * libgnat/a-cwila9.ads: Likewise.
        * libgnat/a-decima.adb: Likewise.
        * libgnat/a-decima.ads: Likewise.
        * libgnat/a-decima__128.ads: Likewise.
        * libgnat/a-dhfina.adb: Likewise.
        * libgnat/a-dhfina.ads: Likewise.
        * libgnat/a-diocst.adb: Likewise.
        * libgnat/a-diocst.ads: Likewise.
        * libgnat/a-direct.adb: Likewise.
        * libgnat/a-direct.ads: Likewise.
        * libgnat/a-direio.adb: Likewise.
        * libgnat/a-direio.ads: Likewise.
        * libgnat/a-dirval.adb: Likewise.
        * libgnat/a-dirval.ads: Likewise.
        * libgnat/a-dirval__mingw.adb: Likewise.
        * libgnat/a-einuoc.adb: Likewise.
        * libgnat/a-einuoc.ads: Likewise.
        * libgnat/a-elchha.adb: Likewise.
        * libgnat/a-elchha.ads: Likewise.
        * libgnat/a-elchha__vxworks-ppc-full.adb: Likewise.
        * libgnat/a-envvar.adb: Likewise.
        * libgnat/a-excach.adb: Likewise.
        * libgnat/a-except.adb: Likewise.
        * libgnat/a-except.ads: Likewise.
        * libgnat/a-exctra.adb: Likewise.
        * libgnat/a-exctra.ads: Likewise.
        * libgnat/a-exexda.adb: Likewise.
        * libgnat/a-exexpr.adb: Likewise.
        * libgnat/a-exextr.adb: Likewise.
        * libgnat/a-exstat.adb: Likewise.
        * libgnat/a-finali.adb: Likewise.
        * libgnat/a-finali.ads: Likewise.
        * libgnat/a-locale.adb: Likewise.
        * libgnat/a-locale.ads: Likewise.
        * libgnat/a-nagefl.ads: Likewise.
        * libgnat/a-naliop.ads: Likewise.
        * libgnat/a-naliop__nolibm.ads: Likewise.
        * libgnat/a-nallfl.ads: Likewise.
        * libgnat/a-nallfl__wraplf.ads: Likewise.
        * libgnat/a-nalofl.ads: Likewise.
        * libgnat/a-nashfl.ads: Likewise.
        * libgnat/a-nashfl__wraplf.ads: Likewise.
        * libgnat/a-nbnbin.adb: Likewise.
        * libgnat/a-nbnbin__gmp.adb: Likewise.
        * libgnat/a-nbnbre.adb: Likewise.
        * libgnat/a-ngcefu.adb: Likewise.
        * libgnat/a-ngcoar.adb: Likewise.
        * libgnat/a-ngcoty.adb: Likewise.
        * libgnat/a-ngcoty.ads: Likewise.
        * libgnat/a-ngelfu.adb: Likewise.
        * libgnat/a-ngelfu.ads: Likewise.
        * libgnat/a-ngrear.adb: Likewise.
        * libgnat/a-ngrear.ads: Likewise.
        * libgnat/a-nuauco.ads: Likewise.
        * libgnat/a-nuauco__x86.ads: Likewise.
        * libgnat/a-nuaufl.ads: Likewise.
        * libgnat/a-nuaufl__wraplf.ads: Likewise.
        * libgnat/a-nudira.adb: Likewise.
        * libgnat/a-nudira.ads: Likewise.
        * libgnat/a-nuflra.adb: Likewise.
        * libgnat/a-nuflra.ads: Likewise.
        * libgnat/a-numaux.ads: Likewise.
        * libgnat/a-rbtgbk.adb: Likewise.
        * libgnat/a-rbtgbk.ads: Likewise.
        * libgnat/a-rbtgbo.adb: Likewise.
        * libgnat/a-rbtgbo.ads: Likewise.
        * libgnat/a-rbtgso.adb: Likewise.
        * libgnat/a-rbtgso.ads: Likewise.
        * libgnat/a-sbecin.adb: Likewise.
        * libgnat/a-sbecin.ads: Likewise.
        * libgnat/a-sbhcin.adb: Likewise.
        * libgnat/a-sbhcin.ads: Likewise.
        * libgnat/a-sblcin.adb: Likewise.
        * libgnat/a-sblcin.ads: Likewise.
        * libgnat/a-secain.adb: Likewise.
        * libgnat/a-secain.ads: Likewise.
        * libgnat/a-sequio.adb: Likewise.
        * libgnat/a-sequio.ads: Likewise.
        * libgnat/a-sfecin.ads: Likewise.
        * libgnat/a-sfhcin.ads: Likewise.
        * libgnat/a-sflcin.ads: Likewise.
        * libgnat/a-shcain.adb: Likewise.
        * libgnat/a-shcain.ads: Likewise.
        * libgnat/a-siocst.adb: Likewise.
        * libgnat/a-siocst.ads: Likewise.
        * libgnat/a-slcain.adb: Likewise.
        * libgnat/a-slcain.ads: Likewise.
        * libgnat/a-ssicst.adb: Likewise.
        * libgnat/a-ssicst.ads: Likewise.
        * libgnat/a-stboha.adb: Likewise.
        * libgnat/a-stmaco.ads: Likewise.
        * libgnat/a-stobbu.adb: Likewise.
        * libgnat/a-stobbu.ads: Likewise.
        * libgnat/a-stobfi.adb: Likewise.
        * libgnat/a-stobfi.ads: Likewise.
        * libgnat/a-storio.adb: Likewise.
        * libgnat/a-stoubu.adb: Likewise.
        * libgnat/a-stoubu.ads: Likewise.
        * libgnat/a-stoufi.adb: Likewise.
        * libgnat/a-stoufi.ads: Likewise.
        * libgnat/a-stoufo.adb: Likewise.
        * libgnat/a-stoufo.ads: Likewise.
        * libgnat/a-stouut.adb: Likewise.
        * libgnat/a-stouut.ads: Likewise.
        * libgnat/a-strbou.adb: Likewise.
        * libgnat/a-strbou.ads: Likewise.
        * libgnat/a-stream.adb: Likewise.
        * libgnat/a-stream.ads: Likewise.
        * libgnat/a-strfix.adb: Likewise.
        * libgnat/a-strhas.adb: Likewise.
        * libgnat/a-strmap.adb: Likewise.
        * libgnat/a-strmap.ads: Likewise.
        * libgnat/a-strsea.adb: Likewise.
        * libgnat/a-strsea.ads: Likewise.
        * libgnat/a-strsto.ads: Likewise.
        * libgnat/a-strsup.adb: Likewise.
        * libgnat/a-strsup.ads: Likewise.
        * libgnat/a-strunb.adb: Likewise.
        * libgnat/a-strunb.ads: Likewise.
        * libgnat/a-strunb__shared.adb: Likewise.
        * libgnat/a-strunb__shared.ads: Likewise.
        * libgnat/a-ststbo.adb: Likewise.
        * libgnat/a-ststbo.ads: Likewise.
        * libgnat/a-ststio.adb: Likewise.
        * libgnat/a-ststio.ads: Likewise.
        * libgnat/a-ststun.adb: Likewise.
        * libgnat/a-ststun.ads: Likewise.
        * libgnat/a-stteou.ads: Likewise.
        * libgnat/a-stunau.adb: Likewise.
        * libgnat/a-stunau.ads: Likewise.
        * libgnat/a-stunau__shared.adb: Likewise.
        * libgnat/a-stunha.adb: Likewise.
        * libgnat/a-stuten.adb: Likewise.
        * libgnat/a-stwibo.adb: Likewise.
        * libgnat/a-stwibo.ads: Likewise.
        * libgnat/a-stwifi.adb: Likewise.
        * libgnat/a-stwiha.adb: Likewise.
        * libgnat/a-stwima.adb: Likewise.
        * libgnat/a-stwima.ads: Likewise.
        * libgnat/a-stwise.adb: Likewise.
        * libgnat/a-stwise.ads: Likewise.
        * libgnat/a-stwisu.adb: Likewise.
        * libgnat/a-stwisu.ads: Likewise.
        * libgnat/a-stwiun.adb: Likewise.
        * libgnat/a-stwiun.ads: Likewise.
        * libgnat/a-stwiun__shared.adb: Likewise.
        * libgnat/a-stwiun__shared.ads: Likewise.
        * libgnat/a-stzbou.adb: Likewise.
        * libgnat/a-stzbou.ads: Likewise.
        * libgnat/a-stzfix.adb: Likewise.
        * libgnat/a-stzhas.adb: Likewise.
        * libgnat/a-stzmap.adb: Likewise.
        * libgnat/a-stzmap.ads: Likewise.
        * libgnat/a-stzsea.adb: Likewise.
        * libgnat/a-stzsea.ads: Likewise.
        * libgnat/a-stzsup.adb: Likewise.
        * libgnat/a-stzsup.ads: Likewise.
        * libgnat/a-stzunb.adb: Likewise.
        * libgnat/a-stzunb.ads: Likewise.
        * libgnat/a-stzunb__shared.adb: Likewise.
        * libgnat/a-stzunb__shared.ads: Likewise.
        * libgnat/a-suecin.adb: Likewise.
        * libgnat/a-suecin.ads: Likewise.
        * libgnat/a-suenco.adb: Likewise.
        * libgnat/a-suenst.adb: Likewise.
        * libgnat/a-suewst.adb: Likewise.
        * libgnat/a-suezst.adb: Likewise.
        * libgnat/a-suhcin.adb: Likewise.
        * libgnat/a-suhcin.ads: Likewise.
        * libgnat/a-sulcin.adb: Likewise.
        * libgnat/a-sulcin.ads: Likewise.
        * libgnat/a-suteio.adb: Likewise.
        * libgnat/a-suteio.ads: Likewise.
        * libgnat/a-suteio__shared.adb: Likewise.
        * libgnat/a-swbwha.adb: Likewise.
        * libgnat/a-swmwco.ads: Likewise.
        * libgnat/a-swunau.adb: Likewise.
        * libgnat/a-swunau.ads: Likewise.
        * libgnat/a-swunau__shared.adb: Likewise.
        * libgnat/a-swuwha.adb: Likewise.
        * libgnat/a-swuwti.adb: Likewise.
        * libgnat/a-swuwti.ads: Likewise.
        * libgnat/a-swuwti__shared.adb: Likewise.
        * libgnat/a-szbzha.adb: Likewise.
        * libgnat/a-szmzco.ads: Likewise.
        * libgnat/a-szunau.adb: Likewise.
        * libgnat/a-szunau.ads: Likewise.
        * libgnat/a-szunau__shared.adb: Likewise.
        * libgnat/a-szuzha.adb: Likewise.
        * libgnat/a-szuzti.adb: Likewise.
        * libgnat/a-szuzti.ads: Likewise.
        * libgnat/a-szuzti__shared.adb: Likewise.
        * libgnat/a-tags.adb: Likewise.
        * libgnat/a-tags.ads: Likewise.
        * libgnat/a-teioed.adb: Likewise.
        * libgnat/a-teioed.ads: Likewise.
        * libgnat/a-textio.adb: Likewise.
        * libgnat/a-textio.ads: Likewise.
        * libgnat/a-tiboio.adb: Likewise.
        * libgnat/a-ticoau.adb: Likewise.
        * libgnat/a-ticoau.ads: Likewise.
        * libgnat/a-ticoio.adb: Likewise.
        * libgnat/a-ticoio.ads: Likewise.
        * libgnat/a-tideau.adb: Likewise.
        * libgnat/a-tideau.ads: Likewise.
        * libgnat/a-tideio.adb: Likewise.
        * libgnat/a-tideio.ads: Likewise.
        * libgnat/a-tideio__128.adb: Likewise.
        * libgnat/a-tienau.adb: Likewise.
        * libgnat/a-tienau.ads: Likewise.
        * libgnat/a-tienio.adb: Likewise.
        * libgnat/a-tifiau.adb: Likewise.
        * libgnat/a-tifiau.ads: Likewise.
        * libgnat/a-tifiio.adb: Likewise.
        * libgnat/a-tifiio__128.adb: Likewise.
        * libgnat/a-tiflau.adb: Likewise.
        * libgnat/a-tiflau.ads: Likewise.
        * libgnat/a-tiflio.adb: Likewise.
        * libgnat/a-tiflio.ads: Likewise.
        * libgnat/a-tigeau.adb: Likewise.
        * libgnat/a-tigeau.ads: Likewise.
        * libgnat/a-tigeli.adb: Likewise.
        * libgnat/a-tiinau.adb: Likewise.
        * libgnat/a-tiinau.ads: Likewise.
        * libgnat/a-tiinio.adb: Likewise.
        * libgnat/a-tiinio.ads: Likewise.
        * libgnat/a-tiinio__128.adb: Likewise.
        * libgnat/a-timoio.adb: Likewise.
        * libgnat/a-timoio.ads: Likewise.
        * libgnat/a-timoio__128.adb: Likewise.
        * libgnat/a-tiocst.adb: Likewise.
        * libgnat/a-tiocst.ads: Likewise.
        * libgnat/a-tirsfi.adb: Likewise.
        * libgnat/a-tirsfi.ads: Likewise.
        * libgnat/a-titest.adb: Likewise.
        * libgnat/a-undesu.adb: Likewise.
        * libgnat/a-wichha.adb: Likewise.
        * libgnat/a-wichun.adb: Likewise.
        * libgnat/a-wichun.ads: Likewise.
        * libgnat/a-witeio.adb: Likewise.
        * libgnat/a-witeio.ads: Likewise.
        * libgnat/a-wrstfi.adb: Likewise.
        * libgnat/a-wrstfi.ads: Likewise.
        * libgnat/a-wtcoau.adb: Likewise.
        * libgnat/a-wtcoau.ads: Likewise.
        * libgnat/a-wtcoio.adb: Likewise.
        * libgnat/a-wtcstr.adb: Likewise.
        * libgnat/a-wtcstr.ads: Likewise.
        * libgnat/a-wtdeau.adb: Likewise.
        * libgnat/a-wtdeau.ads: Likewise.
        * libgnat/a-wtdeio.adb: Likewise.
        * libgnat/a-wtdeio__128.adb: Likewise.
        * libgnat/a-wtedit.adb: Likewise.
        * libgnat/a-wtedit.ads: Likewise.
        * libgnat/a-wtenau.adb: Likewise.
        * libgnat/a-wtenau.ads: Likewise.
        * libgnat/a-wtenio.adb: Likewise.
        * libgnat/a-wtfiau.adb: Likewise.
        * libgnat/a-wtfiau.ads: Likewise.
        * libgnat/a-wtfiio.adb: Likewise.
        * libgnat/a-wtfiio__128.adb: Likewise.
        * libgnat/a-wtflau.adb: Likewise.
        * libgnat/a-wtflau.ads: Likewise.
        * libgnat/a-wtflio.adb: Likewise.
        * libgnat/a-wtgeau.adb: Likewise.
        * libgnat/a-wtgeau.ads: Likewise.
        * libgnat/a-wtinau.adb: Likewise.
        * libgnat/a-wtinau.ads: Likewise.
        * libgnat/a-wtinio.adb: Likewise.
        * libgnat/a-wtinio__128.adb: Likewise.
        * libgnat/a-wtmoio.adb: Likewise.
        * libgnat/a-wtmoio.ads: Likewise.
        * libgnat/a-wtmoio__128.adb: Likewise.
        * libgnat/a-wttest.adb: Likewise.
        * libgnat/a-wwboio.adb: Likewise.
        * libgnat/a-zchhan.adb: Likewise.
        * libgnat/a-zchuni.adb: Likewise.
        * libgnat/a-zchuni.ads: Likewise.
        * libgnat/a-zrstfi.adb: Likewise.
        * libgnat/a-zrstfi.ads: Likewise.
        * libgnat/a-ztcoau.adb: Likewise.
        * libgnat/a-ztcoio.adb: Likewise.
        * libgnat/a-ztcstr.adb: Likewise.
        * libgnat/a-ztcstr.ads: Likewise.
        * libgnat/a-ztdeau.adb: Likewise.
        * libgnat/a-ztdeau.ads: Likewise.
        * libgnat/a-ztdeio.adb: Likewise.
        * libgnat/a-ztdeio__128.adb: Likewise.
        * libgnat/a-ztedit.adb: Likewise.
        * libgnat/a-ztedit.ads: Likewise.
        * libgnat/a-ztenau.adb: Likewise.
        * libgnat/a-ztenau.ads: Likewise.
        * libgnat/a-ztenio.adb: Likewise.
        * libgnat/a-ztexio.adb: Likewise.
        * libgnat/a-ztexio.ads: Likewise.
        * libgnat/a-ztfiau.adb: Likewise.
        * libgnat/a-ztfiau.ads: Likewise.
        * libgnat/a-ztfiio.adb: Likewise.
        * libgnat/a-ztfiio__128.adb: Likewise.
        * libgnat/a-ztflau.adb: Likewise.
        * libgnat/a-ztflau.ads: Likewise.
        * libgnat/a-ztflio.adb: Likewise.
        * libgnat/a-ztgeau.adb: Likewise.
        * libgnat/a-ztgeau.ads: Likewise.
        * libgnat/a-ztinau.adb: Likewise.
        * libgnat/a-ztinau.ads: Likewise.
        * libgnat/a-ztinio.adb: Likewise.
        * libgnat/a-ztinio__128.adb: Likewise.
        * libgnat/a-ztmoio.adb: Likewise.
        * libgnat/a-ztmoio__128.adb: Likewise.
        * libgnat/a-zttest.adb: Likewise.
        * libgnat/a-zzboio.adb: Likewise.
        * libgnat/g-allein.ads: Likewise.
        * libgnat/g-alleve.adb: Likewise.
        * libgnat/g-alleve.ads: Likewise.
        * libgnat/g-alleve__hard.adb: Likewise.
        * libgnat/g-alleve__hard.ads: Likewise.
        * libgnat/g-altcon.adb: Likewise.
        * libgnat/g-altcon.ads: Likewise.
        * libgnat/g-altive.ads: Likewise.
        * libgnat/g-alveop.adb: Likewise.
        * libgnat/g-alveop.ads: Likewise.
        * libgnat/g-alvety.ads: Likewise.
        * libgnat/g-alvevi.ads: Likewise.
        * libgnat/g-arrspl.adb: Likewise.
        * libgnat/g-arrspl.ads: Likewise.
        * libgnat/g-awk.adb: Likewise.
        * libgnat/g-awk.ads: Likewise.
        * libgnat/g-binenv.adb: Likewise.
        * libgnat/g-binenv.ads: Likewise.
        * libgnat/g-brapre.ads: Likewise.
        * libgnat/g-bubsor.adb: Likewise.
        * libgnat/g-bubsor.ads: Likewise.
        * libgnat/g-busora.adb: Likewise.
        * libgnat/g-busora.ads: Likewise.
        * libgnat/g-busorg.adb: Likewise.
        * libgnat/g-busorg.ads: Likewise.
        * libgnat/g-byorma.adb: Likewise.
        * libgnat/g-byorma.ads: Likewise.
        * libgnat/g-bytswa.adb: Likewise.
        * libgnat/g-bytswa.ads: Likewise.
        * libgnat/g-calend.adb: Likewise.
        * libgnat/g-calend.ads: Likewise.
        * libgnat/g-casuti.adb: Likewise.
        * libgnat/g-casuti.ads: Likewise.
        * libgnat/g-catiio.adb: Likewise.
        * libgnat/g-catiio.ads: Likewise.
        * libgnat/g-cgi.adb: Likewise.
        * libgnat/g-cgi.ads: Likewise.
        * libgnat/g-cgicoo.adb: Likewise.
        * libgnat/g-cgicoo.ads: Likewise.
        * libgnat/g-cgideb.adb: Likewise.
        * libgnat/g-cgideb.ads: Likewise.
        * libgnat/g-comlin.adb: Likewise.
        * libgnat/g-comlin.ads: Likewise.
        * libgnat/g-comver.adb: Likewise.
        * libgnat/g-comver.ads: Likewise.
        * libgnat/g-cppexc.adb: Likewise.
        * libgnat/g-cppexc.ads: Likewise.
        * libgnat/g-crc32.adb: Likewise.
        * libgnat/g-crc32.ads: Likewise.
        * libgnat/g-ctrl_c.adb: Likewise.
        * libgnat/g-ctrl_c.ads: Likewise.
        * libgnat/g-curexc.ads: Likewise.
        * libgnat/g-debpoo.adb: Likewise.
        * libgnat/g-debpoo.ads: Likewise.
        * libgnat/g-debuti.adb: Likewise.
        * libgnat/g-debuti.ads: Likewise.
        * libgnat/g-decstr.adb: Likewise.
        * libgnat/g-decstr.ads: Likewise.
        * libgnat/g-deutst.ads: Likewise.
        * libgnat/g-diopit.adb: Likewise.
        * libgnat/g-diopit.ads: Likewise.
        * libgnat/g-dirope.adb: Likewise.
        * libgnat/g-dirope.ads: Likewise.
        * libgnat/g-dynhta.adb: Likewise.
        * libgnat/g-dynhta.ads: Likewise.
        * libgnat/g-dyntab.adb: Likewise.
        * libgnat/g-dyntab.ads: Likewise.
        * libgnat/g-eacodu.adb: Likewise.
        * libgnat/g-encstr.adb: Likewise.
        * libgnat/g-encstr.ads: Likewise.
        * libgnat/g-enutst.ads: Likewise.
        * libgnat/g-excact.adb: Likewise.
        * libgnat/g-excact.ads: Likewise.
        * libgnat/g-except.ads: Likewise.
        * libgnat/g-exctra.adb: Likewise.
        * libgnat/g-exctra.ads: Likewise.
        * libgnat/g-expect.adb: Likewise.
        * libgnat/g-expect.ads: Likewise.
        * libgnat/g-exptty.adb: Likewise.
        * libgnat/g-exptty.ads: Likewise.
        * libgnat/g-flocon.ads: Likewise.
        * libgnat/g-forstr.adb: Likewise.
        * libgnat/g-forstr.ads: Likewise.
        * libgnat/g-graphs.adb: Likewise.
        * libgnat/g-graphs.ads: Likewise.
        * libgnat/g-heasor.adb: Likewise.
        * libgnat/g-heasor.ads: Likewise.
        * libgnat/g-hesora.adb: Likewise.
        * libgnat/g-hesora.ads: Likewise.
        * libgnat/g-hesorg.adb: Likewise.
        * libgnat/g-hesorg.ads: Likewise.
        * libgnat/g-htable.adb: Likewise.
        * libgnat/g-htable.ads: Likewise.
        * libgnat/g-io-put__vxworks.adb: Likewise.
        * libgnat/g-io.adb: Likewise.
        * libgnat/g-io.ads: Likewise.
        * libgnat/g-io_aux.adb: Likewise.
        * libgnat/g-io_aux.ads: Likewise.
        * libgnat/g-lists.adb: Likewise.
        * libgnat/g-lists.ads: Likewise.
        * libgnat/g-locfil.adb: Likewise.
        * libgnat/g-locfil.ads: Likewise.
        * libgnat/g-mbdira.adb: Likewise.
        * libgnat/g-mbdira.ads: Likewise.
        * libgnat/g-mbflra.adb: Likewise.
        * libgnat/g-mbflra.ads: Likewise.
        * libgnat/g-md5.adb: Likewise.
        * libgnat/g-md5.ads: Likewise.
        * libgnat/g-memdum.adb: Likewise.
        * libgnat/g-memdum.ads: Likewise.
        * libgnat/g-moreex.adb: Likewise.
        * libgnat/g-moreex.ads: Likewise.
        * libgnat/g-os_lib.adb: Likewise.
        * libgnat/g-os_lib.ads: Likewise.
        * libgnat/g-pehage.adb: Likewise.
        * libgnat/g-pehage.ads: Likewise.
        * libgnat/g-rannum.adb: Likewise.
        * libgnat/g-rannum.ads: Likewise.
        * libgnat/g-regexp.adb: Likewise.
        * libgnat/g-regexp.ads: Likewise.
        * libgnat/g-regist.adb: Likewise.
        * libgnat/g-regist.ads: Likewise.
        * libgnat/g-regpat.adb: Likewise.
        * libgnat/g-regpat.ads: Likewise.
        * libgnat/g-rewdat.adb: Likewise.
        * libgnat/g-rewdat.ads: Likewise.
        * libgnat/g-sechas.adb: Likewise.
        * libgnat/g-sechas.ads: Likewise.
        * libgnat/g-sehamd.adb: Likewise.
        * libgnat/g-sehamd.ads: Likewise.
        * libgnat/g-sehash.adb: Likewise.
        * libgnat/g-sehash.ads: Likewise.
        * libgnat/g-sercom.adb: Likewise.
        * libgnat/g-sercom.ads: Likewise.
        * libgnat/g-sercom__linux.adb: Likewise.
        * libgnat/g-sercom__mingw.adb: Likewise.
        * libgnat/g-sestin.ads: Likewise.
        * libgnat/g-sets.adb: Likewise.
        * libgnat/g-sets.ads: Likewise.
        * libgnat/g-sha1.adb: Likewise.
        * libgnat/g-sha1.ads: Likewise.
        * libgnat/g-sha224.ads: Likewise.
        * libgnat/g-sha256.ads: Likewise.
        * libgnat/g-sha384.ads: Likewise.
        * libgnat/g-sha512.ads: Likewise.
        * libgnat/g-shsh32.adb: Likewise.
        * libgnat/g-shsh32.ads: Likewise.
        * libgnat/g-shsh64.adb: Likewise.
        * libgnat/g-shsh64.ads: Likewise.
        * libgnat/g-shshco.adb: Likewise.
        * libgnat/g-shshco.ads: Likewise.
        * libgnat/g-soccon.ads: Likewise.
        * libgnat/g-socket.adb: Likewise.
        * libgnat/g-socket.ads: Likewise.
        * libgnat/g-socket__dummy.adb: Likewise.
        * libgnat/g-socket__dummy.ads: Likewise.
        * libgnat/g-socpol.adb: Likewise.
        * libgnat/g-socpol.ads: Likewise.
        * libgnat/g-socpol__dummy.adb: Likewise.
        * libgnat/g-socpol__dummy.ads: Likewise.
        * libgnat/g-socthi.adb: Likewise.
        * libgnat/g-socthi.ads: Likewise.
        * libgnat/g-socthi__dummy.adb: Likewise.
        * libgnat/g-socthi__dummy.ads: Likewise.
        * libgnat/g-socthi__mingw.adb: Likewise.
        * libgnat/g-socthi__mingw.ads: Likewise.
        * libgnat/g-socthi__vxworks.adb: Likewise.
        * libgnat/g-socthi__vxworks.ads: Likewise.
        * libgnat/g-soliop.ads: Likewise.
        * libgnat/g-soliop__lynxos.ads: Likewise.
        * libgnat/g-soliop__mingw.ads: Likewise.
        * libgnat/g-soliop__qnx.ads: Likewise.
        * libgnat/g-soliop__solaris.ads: Likewise.
        * libgnat/g-sopowa.adb: Likewise.
        * libgnat/g-sopowa__mingw.adb: Likewise.
        * libgnat/g-sopowa__posix.adb: Likewise.
        * libgnat/g-sothco.adb: Likewise.
        * libgnat/g-sothco.ads: Likewise.
        * libgnat/g-sothco__dummy.adb: Likewise.
        * libgnat/g-sothco__dummy.ads: Likewise.
        * libgnat/g-souinf.ads: Likewise.
        * libgnat/g-spchge.adb: Likewise.
        * libgnat/g-spchge.ads: Likewise.
        * libgnat/g-speche.adb: Likewise.
        * libgnat/g-speche.ads: Likewise.
        * libgnat/g-spipat.adb: Likewise.
        * libgnat/g-spipat.ads: Likewise.
        * libgnat/g-spitbo.adb: Likewise.
        * libgnat/g-spitbo.ads: Likewise.
        * libgnat/g-spogwa.adb: Likewise.
        * libgnat/g-spogwa.ads: Likewise.
        * libgnat/g-sptabo.ads: Likewise.
        * libgnat/g-sptain.ads: Likewise.
        * libgnat/g-sptavs.ads: Likewise.
        * libgnat/g-sse.ads: Likewise.
        * libgnat/g-ssvety.ads: Likewise.
        * libgnat/g-sthcso.adb: Likewise.
        * libgnat/g-stheme.adb: Likewise.
        * libgnat/g-strhas.ads: Likewise.
        * libgnat/g-string.adb: Likewise.
        * libgnat/g-string.ads: Likewise.
        * libgnat/g-strspl.ads: Likewise.
        * libgnat/g-stseme.adb: Likewise.
        * libgnat/g-stsifd__sockets.adb: Likewise.
        * libgnat/g-table.adb: Likewise.
        * libgnat/g-table.ads: Likewise.
        * libgnat/g-tasloc.adb: Likewise.
        * libgnat/g-tasloc.ads: Likewise.
        * libgnat/g-timsta.adb: Likewise.
        * libgnat/g-timsta.ads: Likewise.
        * libgnat/g-traceb.adb: Likewise.
        * libgnat/g-traceb.ads: Likewise.
        * libgnat/g-trasym.adb: Likewise.
        * libgnat/g-trasym.ads: Likewise.
        * libgnat/g-tty.adb: Likewise.
        * libgnat/g-tty.ads: Likewise.
        * libgnat/g-u3spch.adb: Likewise.
        * libgnat/g-u3spch.ads: Likewise.
        * libgnat/g-utf_32.adb: Likewise.
        * libgnat/g-utf_32.ads: Likewise.
        * libgnat/g-wispch.adb: Likewise.
        * libgnat/g-wispch.ads: Likewise.
        * libgnat/g-wistsp.ads: Likewise.
        * libgnat/g-zspche.adb: Likewise.
        * libgnat/g-zspche.ads: Likewise.
        * libgnat/g-zstspl.ads: Likewise.
        * libgnat/gnat.ads: Likewise.
        * libgnat/i-c.adb: Likewise.
        * libgnat/i-cexten.ads: Likewise.
        * libgnat/i-cexten__128.ads: Likewise.
        * libgnat/i-cobol.adb: Likewise.
        * libgnat/i-cobol.ads: Likewise.
        * libgnat/i-cpoint.adb: Likewise.
        * libgnat/i-cpoint.ads: Likewise.
        * libgnat/i-cstrea.adb: Likewise.
        * libgnat/i-cstrea.ads: Likewise.
        * libgnat/i-cstrin.adb: Likewise.
        * libgnat/i-cstrin.ads: Likewise.
        * libgnat/i-fortra.adb: Likewise.
        * libgnat/i-pacdec.adb: Likewise.
        * libgnat/i-pacdec.ads: Likewise.
        * libgnat/i-vxwoio.adb: Likewise.
        * libgnat/i-vxwoio.ads: Likewise.
        * libgnat/i-vxwork.ads: Likewise.
        * libgnat/i-vxwork__x86.ads: Likewise.
        * libgnat/interfac.ads: Likewise.
        * libgnat/interfac__2020.ads: Likewise.
        * libgnat/memtrack.adb: Likewise.
        * libgnat/s-addima.adb: Likewise.
        * libgnat/s-addima.ads: Likewise.
        * libgnat/s-addope.adb: Likewise.
        * libgnat/s-addope.ads: Likewise.
        * libgnat/s-aoinar.adb: Likewise.
        * libgnat/s-aoinar.ads: Likewise.
        * libgnat/s-aomoar.adb: Likewise.
        * libgnat/s-aomoar.ads: Likewise.
        * libgnat/s-aotase.adb: Likewise.
        * libgnat/s-aotase.ads: Likewise.
        * libgnat/s-aridou.adb: Likewise.
        * libgnat/s-aridou.ads: Likewise.
        * libgnat/s-arit128.adb: Likewise.
        * libgnat/s-arit128.ads: Likewise.
        * libgnat/s-arit32.adb: Likewise.
        * libgnat/s-arit32.ads: Likewise.
        * libgnat/s-arit64.adb: Likewise.
        * libgnat/s-arit64.ads: Likewise.
        * libgnat/s-assert.adb: Likewise.
        * libgnat/s-assert.ads: Likewise.
        * libgnat/s-atacco.adb: Likewise.
        * libgnat/s-atacco.ads: Likewise.
        * libgnat/s-atocou.adb: Likewise.
        * libgnat/s-atocou.ads: Likewise.
        * libgnat/s-atocou__builtin.adb: Likewise.
        * libgnat/s-atocou__x86.adb: Likewise.
        * libgnat/s-atoope.ads: Likewise.
        * libgnat/s-atopex.adb: Likewise.
        * libgnat/s-atopex.ads: Likewise.
        * libgnat/s-atopri.adb: Likewise.
        * libgnat/s-atopri.ads: Likewise.
        * libgnat/s-auxdec.adb: Likewise.
        * libgnat/s-auxdec.ads: Likewise.
        * libgnat/s-bignum.adb: Likewise.
        * libgnat/s-bignum.ads: Likewise.
        * libgnat/s-bitfie.ads: Likewise.
        * libgnat/s-bitops.adb: Likewise.
        * libgnat/s-bitops.ads: Likewise.
        * libgnat/s-bituti.adb: Likewise.
        * libgnat/s-bituti.ads: Likewise.
        * libgnat/s-boarop.ads: Likewise.
        * libgnat/s-boustr.adb: Likewise.
        * libgnat/s-boustr.ads: Likewise.
        * libgnat/s-bytswa.ads: Likewise.
        * libgnat/s-carsi8.adb: Likewise.
        * libgnat/s-carsi8.ads: Likewise.
        * libgnat/s-carun8.adb: Likewise.
        * libgnat/s-carun8.ads: Likewise.
        * libgnat/s-casi128.adb: Likewise.
        * libgnat/s-casi128.ads: Likewise.
        * libgnat/s-casi16.adb: Likewise.
        * libgnat/s-casi16.ads: Likewise.
        * libgnat/s-casi32.adb: Likewise.
        * libgnat/s-casi32.ads: Likewise.
        * libgnat/s-casi64.adb: Likewise.
        * libgnat/s-casi64.ads: Likewise.
        * libgnat/s-casuti.adb: Likewise.
        * libgnat/s-casuti.ads: Likewise.
        * libgnat/s-caun128.adb: Likewise.
        * libgnat/s-caun128.ads: Likewise.
        * libgnat/s-caun16.adb: Likewise.
        * libgnat/s-caun16.ads: Likewise.
        * libgnat/s-caun32.adb: Likewise.
        * libgnat/s-caun32.ads: Likewise.
        * libgnat/s-caun64.adb: Likewise.
        * libgnat/s-caun64.ads: Likewise.
        * libgnat/s-chepoo.ads: Likewise.
        * libgnat/s-commun.adb: Likewise.
        * libgnat/s-commun.ads: Likewise.
        * libgnat/s-conca2.adb: Likewise.
        * libgnat/s-conca2.ads: Likewise.
        * libgnat/s-conca3.adb: Likewise.
        * libgnat/s-conca3.ads: Likewise.
        * libgnat/s-conca4.adb: Likewise.
        * libgnat/s-conca4.ads: Likewise.
        * libgnat/s-conca5.adb: Likewise.
        * libgnat/s-conca5.ads: Likewise.
        * libgnat/s-conca6.adb: Likewise.
        * libgnat/s-conca6.ads: Likewise.
        * libgnat/s-conca7.adb: Likewise.
        * libgnat/s-conca7.ads: Likewise.
        * libgnat/s-conca8.adb: Likewise.
        * libgnat/s-conca8.ads: Likewise.
        * libgnat/s-conca9.adb: Likewise.
        * libgnat/s-conca9.ads: Likewise.
        * libgnat/s-crc32.adb: Likewise.
        * libgnat/s-crc32.ads: Likewise.
        * libgnat/s-crtl.ads: Likewise.
        * libgnat/s-dfmkio.ads: Likewise.
        * libgnat/s-dfmopr.ads: Likewise.
        * libgnat/s-dgmgop.ads: Likewise.
        * libgnat/s-diflio.adb: Likewise.
        * libgnat/s-diflio.ads: Likewise.
        * libgnat/s-diflmk.ads: Likewise.
        * libgnat/s-digemk.ads: Likewise.
        * libgnat/s-diinio.adb: Likewise.
        * libgnat/s-diinio.ads: Likewise.
        * libgnat/s-dilomk.ads: Likewise.
        * libgnat/s-dim.ads: Likewise.
        * libgnat/s-dimkio.ads: Likewise.
        * libgnat/s-dimmks.ads: Likewise.
        * libgnat/s-direio.adb: Likewise.
        * libgnat/s-direio.ads: Likewise.
        * libgnat/s-dlmkio.ads: Likewise.
        * libgnat/s-dlmopr.ads: Likewise.
        * libgnat/s-dmotpr.ads: Likewise.
        * libgnat/s-dsaser.ads: Likewise.
        * libgnat/s-dwalin.adb: Likewise.
        * libgnat/s-dwalin.ads: Likewise.
        * libgnat/s-elaall.adb: Likewise.
        * libgnat/s-elaall.ads: Likewise.
        * libgnat/s-excdeb.adb: Likewise.
        * libgnat/s-excdeb.ads: Likewise.
        * libgnat/s-except.adb: Likewise.
        * libgnat/s-except.ads: Likewise.
        * libgnat/s-excmac__arm.adb: Likewise.
        * libgnat/s-excmac__arm.ads: Likewise.
        * libgnat/s-excmac__gcc.adb: Likewise.
        * libgnat/s-excmac__gcc.ads: Likewise.
        * libgnat/s-exctab.adb: Likewise.
        * libgnat/s-exctab.ads: Likewise.
        * libgnat/s-exctra.adb: Likewise.
        * libgnat/s-exctra.ads: Likewise.
        * libgnat/s-exnint.adb: Likewise.
        * libgnat/s-exnint.ads: Likewise.
        * libgnat/s-exnllf.adb: Likewise.
        * libgnat/s-exnllf.ads: Likewise.
        * libgnat/s-exnlli.adb: Likewise.
        * libgnat/s-exnlli.ads: Likewise.
        * libgnat/s-exnllli.ads: Likewise.
        * libgnat/s-expint.adb: Likewise.
        * libgnat/s-expint.ads: Likewise.
        * libgnat/s-explli.adb: Likewise.
        * libgnat/s-explli.ads: Likewise.
        * libgnat/s-expllli.ads: Likewise.
        * libgnat/s-explllu.ads: Likewise.
        * libgnat/s-expllu.adb: Likewise.
        * libgnat/s-expllu.ads: Likewise.
        * libgnat/s-expmod.adb: Likewise.
        * libgnat/s-expmod.ads: Likewise.
        * libgnat/s-exponn.adb: Likewise.
        * libgnat/s-exponn.ads: Likewise.
        * libgnat/s-expont.adb: Likewise.
        * libgnat/s-expont.ads: Likewise.
        * libgnat/s-exponu.adb: Likewise.
        * libgnat/s-exponu.ads: Likewise.
        * libgnat/s-expuns.adb: Likewise.
        * libgnat/s-expuns.ads: Likewise.
        * libgnat/s-fatflt.ads: Likewise.
        * libgnat/s-fatgen.adb: Likewise.
        * libgnat/s-fatgen.ads: Likewise.
        * libgnat/s-fatlfl.ads: Likewise.
        * libgnat/s-fatllf.ads: Likewise.
        * libgnat/s-ficobl.ads: Likewise.
        * libgnat/s-filatt.ads: Likewise.
        * libgnat/s-fileio.adb: Likewise.
        * libgnat/s-fileio.ads: Likewise.
        * libgnat/s-finmas.adb: Likewise.
        * libgnat/s-finmas.ads: Likewise.
        * libgnat/s-finroo.adb: Likewise.
        * libgnat/s-finroo.ads: Likewise.
        * libgnat/s-flocon.adb: Likewise.
        * libgnat/s-flocon.ads: Likewise.
        * libgnat/s-flocon__none.adb: Likewise.
        * libgnat/s-fode128.ads: Likewise.
        * libgnat/s-fode32.ads: Likewise.
        * libgnat/s-fode64.ads: Likewise.
        * libgnat/s-fofi128.ads: Likewise.
        * libgnat/s-fofi32.ads: Likewise.
        * libgnat/s-fofi64.ads: Likewise.
        * libgnat/s-fore_d.adb: Likewise.
        * libgnat/s-fore_d.ads: Likewise.
        * libgnat/s-fore_f.adb: Likewise.
        * libgnat/s-fore_f.ads: Likewise.
        * libgnat/s-forrea.adb: Likewise.
        * libgnat/s-forrea.ads: Likewise.
        * libgnat/s-gearop.adb: Likewise.
        * libgnat/s-gearop.ads: Likewise.
        * libgnat/s-genbig.adb: Likewise.
        * libgnat/s-genbig.ads: Likewise.
        * libgnat/s-geveop.adb: Likewise.
        * libgnat/s-geveop.ads: Likewise.
        * libgnat/s-gloloc.adb: Likewise.
        * libgnat/s-gloloc.ads: Likewise.
        * libgnat/s-gloloc__mingw.adb: Likewise.
        * libgnat/s-htable.adb: Likewise.
        * libgnat/s-htable.ads: Likewise.
        * libgnat/s-imageb.adb: Likewise.
        * libgnat/s-imageb.ads: Likewise.
        * libgnat/s-imaged.adb: Likewise.
        * libgnat/s-imaged.ads: Likewise.
        * libgnat/s-imagef.adb: Likewise.
        * libgnat/s-imagef.ads: Likewise.
        * libgnat/s-imagei.adb: Likewise.
        * libgnat/s-imagei.ads: Likewise.
        * libgnat/s-imageu.adb: Likewise.
        * libgnat/s-imageu.ads: Likewise.
        * libgnat/s-imagew.adb: Likewise.
        * libgnat/s-imagew.ads: Likewise.
        * libgnat/s-imde128.ads: Likewise.
        * libgnat/s-imde32.ads: Likewise.
        * libgnat/s-imde64.ads: Likewise.
        * libgnat/s-imenne.adb: Likewise.
        * libgnat/s-imenne.ads: Likewise.
        * libgnat/s-imfi128.ads: Likewise.
        * libgnat/s-imfi32.ads: Likewise.
        * libgnat/s-imfi64.ads: Likewise.
        * libgnat/s-imgbiu.adb: Likewise.
        * libgnat/s-imgbiu.ads: Likewise.
        * libgnat/s-imgboo.adb: Likewise.
        * libgnat/s-imgboo.ads: Likewise.
        * libgnat/s-imgcha.adb: Likewise.
        * libgnat/s-imgcha.ads: Likewise.
        * libgnat/s-imgenu.adb: Likewise.
        * libgnat/s-imgenu.ads: Likewise.
        * libgnat/s-imgint.adb: Likewise.
        * libgnat/s-imgint.ads: Likewise.
        * libgnat/s-imgllb.adb: Likewise.
        * libgnat/s-imgllb.ads: Likewise.
        * libgnat/s-imglli.adb: Likewise.
        * libgnat/s-imglli.ads: Likewise.
        * libgnat/s-imglllb.ads: Likewise.
        * libgnat/s-imgllli.ads: Likewise.
        * libgnat/s-imglllu.ads: Likewise.
        * libgnat/s-imglllw.ads: Likewise.
        * libgnat/s-imgllu.adb: Likewise.
        * libgnat/s-imgllu.ads: Likewise.
        * libgnat/s-imgllw.adb: Likewise.
        * libgnat/s-imgllw.ads: Likewise.
        * libgnat/s-imgrea.adb: Likewise.
        * libgnat/s-imgrea.ads: Likewise.
        * libgnat/s-imguns.adb: Likewise.
        * libgnat/s-imguns.ads: Likewise.
        * libgnat/s-imguti.adb: Likewise.
        * libgnat/s-imguti.ads: Likewise.
        * libgnat/s-imgwch.adb: Likewise.
        * libgnat/s-imgwch.ads: Likewise.
        * libgnat/s-imgwiu.adb: Likewise.
        * libgnat/s-imgwiu.ads: Likewise.
        * libgnat/s-io.adb: Likewise.
        * libgnat/s-io.ads: Likewise.
        * libgnat/s-llflex.ads: Likewise.
        * libgnat/s-maccod.ads: Likewise.
        * libgnat/s-mantis.adb: Likewise.
        * libgnat/s-mantis.ads: Likewise.
        * libgnat/s-mastop.adb: Likewise.
        * libgnat/s-mastop.ads: Likewise.
        * libgnat/s-memcop.ads: Likewise.
        * libgnat/s-memory.adb: Likewise.
        * libgnat/s-memory.ads: Likewise.
        * libgnat/s-mmap.adb: Likewise.
        * libgnat/s-mmap.ads: Likewise.
        * libgnat/s-mmauni__long.ads: Likewise.
        * libgnat/s-mmosin__mingw.adb: Likewise.
        * libgnat/s-mmosin__mingw.ads: Likewise.
        * libgnat/s-mmosin__unix.adb: Likewise.
        * libgnat/s-mmosin__unix.ads: Likewise.
        * libgnat/s-multip.adb: Likewise.
        * libgnat/s-objrea.adb: Likewise.
        * libgnat/s-objrea.ads: Likewise.
        * libgnat/s-optide.adb: Likewise.
        * libgnat/s-os_lib.adb: Likewise.
        * libgnat/s-os_lib.ads: Likewise.
        * libgnat/s-osprim.ads: Likewise.
        * libgnat/s-osprim__darwin.adb: Likewise.
        * libgnat/s-osprim__lynxos.ads: Likewise.
        * libgnat/s-osprim__mingw.adb: Likewise.
        * libgnat/s-osprim__posix.adb: Likewise.
        * libgnat/s-osprim__posix2008.adb: Likewise.
        * libgnat/s-osprim__rtems.adb: Likewise.
        * libgnat/s-osprim__solaris.adb: Likewise.
        * libgnat/s-osprim__unix.adb: Likewise.
        * libgnat/s-osprim__vxworks.adb: Likewise.
        * libgnat/s-osprim__x32.adb: Likewise.
        * libgnat/s-osvers__vxworks-653.ads: Likewise.
        * libgnat/s-pack03.adb: Likewise.
        * libgnat/s-pack03.ads: Likewise.
        * libgnat/s-pack05.adb: Likewise.
        * libgnat/s-pack05.ads: Likewise.
        * libgnat/s-pack06.adb: Likewise.
        * libgnat/s-pack06.ads: Likewise.
        * libgnat/s-pack07.adb: Likewise.
        * libgnat/s-pack07.ads: Likewise.
        * libgnat/s-pack09.adb: Likewise.
        * libgnat/s-pack09.ads: Likewise.
        * libgnat/s-pack10.adb: Likewise.
        * libgnat/s-pack10.ads: Likewise.
        * libgnat/s-pack100.adb: Likewise.
        * libgnat/s-pack100.ads: Likewise.
        * libgnat/s-pack101.adb: Likewise.
        * libgnat/s-pack101.ads: Likewise.
        * libgnat/s-pack102.adb: Likewise.
        * libgnat/s-pack102.ads: Likewise.
        * libgnat/s-pack103.adb: Likewise.
        * libgnat/s-pack103.ads: Likewise.
        * libgnat/s-pack104.adb: Likewise.
        * libgnat/s-pack104.ads: Likewise.
        * libgnat/s-pack105.adb: Likewise.
        * libgnat/s-pack105.ads: Likewise.
        * libgnat/s-pack106.adb: Likewise.
        * libgnat/s-pack106.ads: Likewise.
        * libgnat/s-pack107.adb: Likewise.
        * libgnat/s-pack107.ads: Likewise.
        * libgnat/s-pack108.adb: Likewise.
        * libgnat/s-pack108.ads: Likewise.
        * libgnat/s-pack109.adb: Likewise.
        * libgnat/s-pack109.ads: Likewise.
        * libgnat/s-pack11.adb: Likewise.
        * libgnat/s-pack11.ads: Likewise.
        * libgnat/s-pack110.adb: Likewise.
        * libgnat/s-pack110.ads: Likewise.
        * libgnat/s-pack111.adb: Likewise.
        * libgnat/s-pack111.ads: Likewise.
        * libgnat/s-pack112.adb: Likewise.
        * libgnat/s-pack112.ads: Likewise.
        * libgnat/s-pack113.adb: Likewise.
        * libgnat/s-pack113.ads: Likewise.
        * libgnat/s-pack114.adb: Likewise.
        * libgnat/s-pack114.ads: Likewise.
        * libgnat/s-pack115.adb: Likewise.
        * libgnat/s-pack115.ads: Likewise.
        * libgnat/s-pack116.adb: Likewise.
        * libgnat/s-pack116.ads: Likewise.
        * libgnat/s-pack117.adb: Likewise.
        * libgnat/s-pack117.ads: Likewise.
        * libgnat/s-pack118.adb: Likewise.
        * libgnat/s-pack118.ads: Likewise.
        * libgnat/s-pack119.adb: Likewise.
        * libgnat/s-pack119.ads: Likewise.
        * libgnat/s-pack12.adb: Likewise.
        * libgnat/s-pack12.ads: Likewise.
        * libgnat/s-pack120.adb: Likewise.
        * libgnat/s-pack120.ads: Likewise.
        * libgnat/s-pack121.adb: Likewise.
        * libgnat/s-pack121.ads: Likewise.
        * libgnat/s-pack122.adb: Likewise.
        * libgnat/s-pack122.ads: Likewise.
        * libgnat/s-pack123.adb: Likewise.
        * libgnat/s-pack123.ads: Likewise.
        * libgnat/s-pack124.adb: Likewise.
        * libgnat/s-pack124.ads: Likewise.
        * libgnat/s-pack125.adb: Likewise.
        * libgnat/s-pack125.ads: Likewise.
        * libgnat/s-pack126.adb: Likewise.
        * libgnat/s-pack126.ads: Likewise.
        * libgnat/s-pack127.adb: Likewise.
        * libgnat/s-pack127.ads: Likewise.
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        * libgnat/s-pack13.ads: Likewise.
        * libgnat/s-pack14.adb: Likewise.
        * libgnat/s-pack14.ads: Likewise.
        * libgnat/s-pack15.adb: Likewise.
        * libgnat/s-pack15.ads: Likewise.
        * libgnat/s-pack17.adb: Likewise.
        * libgnat/s-pack17.ads: Likewise.
        * libgnat/s-pack18.adb: Likewise.
        * libgnat/s-pack18.ads: Likewise.
        * libgnat/s-pack19.adb: Likewise.
        * libgnat/s-pack19.ads: Likewise.
        * libgnat/s-pack20.adb: Likewise.
        * libgnat/s-pack20.ads: Likewise.
        * libgnat/s-pack21.adb: Likewise.
        * libgnat/s-pack21.ads: Likewise.
        * libgnat/s-pack22.adb: Likewise.
        * libgnat/s-pack22.ads: Likewise.
        * libgnat/s-pack23.adb: Likewise.
        * libgnat/s-pack23.ads: Likewise.
        * libgnat/s-pack24.adb: Likewise.
        * libgnat/s-pack24.ads: Likewise.
        * libgnat/s-pack25.adb: Likewise.
        * libgnat/s-pack25.ads: Likewise.
        * libgnat/s-pack26.adb: Likewise.
        * libgnat/s-pack26.ads: Likewise.
        * libgnat/s-pack27.adb: Likewise.
        * libgnat/s-pack27.ads: Likewise.
        * libgnat/s-pack28.adb: Likewise.
        * libgnat/s-pack28.ads: Likewise.
        * libgnat/s-pack29.adb: Likewise.
        * libgnat/s-pack29.ads: Likewise.
        * libgnat/s-pack30.adb: Likewise.
        * libgnat/s-pack30.ads: Likewise.
        * libgnat/s-pack31.adb: Likewise.
        * libgnat/s-pack31.ads: Likewise.
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        * libgnat/s-pack33.ads: Likewise.
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        * libgnat/s-pack34.ads: Likewise.
        * libgnat/s-pack35.adb: Likewise.
        * libgnat/s-pack35.ads: Likewise.
        * libgnat/s-pack36.adb: Likewise.
        * libgnat/s-pack36.ads: Likewise.
        * libgnat/s-pack37.adb: Likewise.
        * libgnat/s-pack37.ads: Likewise.
        * libgnat/s-pack38.adb: Likewise.
        * libgnat/s-pack38.ads: Likewise.
        * libgnat/s-pack39.adb: Likewise.
        * libgnat/s-pack39.ads: Likewise.
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        * libgnat/s-pack40.ads: Likewise.
        * libgnat/s-pack41.adb: Likewise.
        * libgnat/s-pack41.ads: Likewise.
        * libgnat/s-pack42.adb: Likewise.
        * libgnat/s-pack42.ads: Likewise.
        * libgnat/s-pack43.adb: Likewise.
        * libgnat/s-pack43.ads: Likewise.
        * libgnat/s-pack44.adb: Likewise.
        * libgnat/s-pack44.ads: Likewise.
        * libgnat/s-pack45.adb: Likewise.
        * libgnat/s-pack45.ads: Likewise.
        * libgnat/s-pack46.adb: Likewise.
        * libgnat/s-pack46.ads: Likewise.
        * libgnat/s-pack47.adb: Likewise.
        * libgnat/s-pack47.ads: Likewise.
        * libgnat/s-pack48.adb: Likewise.
        * libgnat/s-pack48.ads: Likewise.
        * libgnat/s-pack49.adb: Likewise.
        * libgnat/s-pack49.ads: Likewise.
        * libgnat/s-pack50.adb: Likewise.
        * libgnat/s-pack50.ads: Likewise.
        * libgnat/s-pack51.adb: Likewise.
        * libgnat/s-pack51.ads: Likewise.
        * libgnat/s-pack52.adb: Likewise.
        * libgnat/s-pack52.ads: Likewise.
        * libgnat/s-pack53.adb: Likewise.
        * libgnat/s-pack53.ads: Likewise.
        * libgnat/s-pack54.adb: Likewise.
        * libgnat/s-pack54.ads: Likewise.
        * libgnat/s-pack55.adb: Likewise.
        * libgnat/s-pack55.ads: Likewise.
        * libgnat/s-pack56.adb: Likewise.
        * libgnat/s-pack56.ads: Likewise.
        * libgnat/s-pack57.adb: Likewise.
        * libgnat/s-pack57.ads: Likewise.
        * libgnat/s-pack58.adb: Likewise.
        * libgnat/s-pack58.ads: Likewise.
        * libgnat/s-pack59.adb: Likewise.
        * libgnat/s-pack59.ads: Likewise.
        * libgnat/s-pack60.adb: Likewise.
        * libgnat/s-pack60.ads: Likewise.
        * libgnat/s-pack61.adb: Likewise.
        * libgnat/s-pack61.ads: Likewise.
        * libgnat/s-pack62.adb: Likewise.
        * libgnat/s-pack62.ads: Likewise.
        * libgnat/s-pack63.adb: Likewise.
        * libgnat/s-pack63.ads: Likewise.
        * libgnat/s-pack65.adb: Likewise.
        * libgnat/s-pack65.ads: Likewise.
        * libgnat/s-pack66.adb: Likewise.
        * libgnat/s-pack66.ads: Likewise.
        * libgnat/s-pack67.adb: Likewise.
        * libgnat/s-pack67.ads: Likewise.
        * libgnat/s-pack68.adb: Likewise.
        * libgnat/s-pack68.ads: Likewise.
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        * libgnat/s-pack69.ads: Likewise.
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        * libgnat/s-pack70.ads: Likewise.
        * libgnat/s-pack71.adb: Likewise.
        * libgnat/s-pack71.ads: Likewise.
        * libgnat/s-pack72.adb: Likewise.
        * libgnat/s-pack72.ads: Likewise.
        * libgnat/s-pack73.adb: Likewise.
        * libgnat/s-pack73.ads: Likewise.
        * libgnat/s-pack74.adb: Likewise.
        * libgnat/s-pack74.ads: Likewise.
        * libgnat/s-pack75.adb: Likewise.
        * libgnat/s-pack75.ads: Likewise.
        * libgnat/s-pack76.adb: Likewise.
        * libgnat/s-pack76.ads: Likewise.
        * libgnat/s-pack77.adb: Likewise.
        * libgnat/s-pack77.ads: Likewise.
        * libgnat/s-pack78.adb: Likewise.
        * libgnat/s-pack78.ads: Likewise.
        * libgnat/s-pack79.adb: Likewise.
        * libgnat/s-pack79.ads: Likewise.
        * libgnat/s-pack80.adb: Likewise.
        * libgnat/s-pack80.ads: Likewise.
        * libgnat/s-pack81.adb: Likewise.
        * libgnat/s-pack81.ads: Likewise.
        * libgnat/s-pack82.adb: Likewise.
        * libgnat/s-pack82.ads: Likewise.
        * libgnat/s-pack83.adb: Likewise.
        * libgnat/s-pack83.ads: Likewise.
        * libgnat/s-pack84.adb: Likewise.
        * libgnat/s-pack84.ads: Likewise.
        * libgnat/s-pack85.adb: Likewise.
        * libgnat/s-pack85.ads: Likewise.
        * libgnat/s-pack86.adb: Likewise.
        * libgnat/s-pack86.ads: Likewise.
        * libgnat/s-pack87.adb: Likewise.
        * libgnat/s-pack87.ads: Likewise.
        * libgnat/s-pack88.adb: Likewise.
        * libgnat/s-pack88.ads: Likewise.
        * libgnat/s-pack89.adb: Likewise.
        * libgnat/s-pack89.ads: Likewise.
        * libgnat/s-pack90.adb: Likewise.
        * libgnat/s-pack90.ads: Likewise.
        * libgnat/s-pack91.adb: Likewise.
        * libgnat/s-pack91.ads: Likewise.
        * libgnat/s-pack92.adb: Likewise.
        * libgnat/s-pack92.ads: Likewise.
        * libgnat/s-pack93.adb: Likewise.
        * libgnat/s-pack93.ads: Likewise.
        * libgnat/s-pack94.adb: Likewise.
        * libgnat/s-pack94.ads: Likewise.
        * libgnat/s-pack95.adb: Likewise.
        * libgnat/s-pack95.ads: Likewise.
        * libgnat/s-pack96.adb: Likewise.
        * libgnat/s-pack96.ads: Likewise.
        * libgnat/s-pack97.adb: Likewise.
        * libgnat/s-pack97.ads: Likewise.
        * libgnat/s-pack98.adb: Likewise.
        * libgnat/s-pack98.ads: Likewise.
        * libgnat/s-pack99.adb: Likewise.
        * libgnat/s-pack99.ads: Likewise.
        * libgnat/s-parame.adb: Likewise.
        * libgnat/s-parame.ads: Likewise.
        * libgnat/s-parame__ae653.ads: Likewise.
        * libgnat/s-parame__hpux.ads: Likewise.
        * libgnat/s-parame__rtems.adb: Likewise.
        * libgnat/s-parame__vxworks.adb: Likewise.
        * libgnat/s-parame__vxworks.ads: Likewise.
        * libgnat/s-parint.adb: Likewise.
        * libgnat/s-parint.ads: Likewise.
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        * libgnat/s-pooglo.ads: Likewise.
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        * libgnat/s-pooloc.ads: Likewise.
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        * libgnat/s-poosiz.ads: Likewise.
        * libgnat/s-powflt.ads: Likewise.
        * libgnat/s-powlfl.ads: Likewise.
        * libgnat/s-powllf.ads: Likewise.
        * libgnat/s-purexc.ads: Likewise.
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        * libgnat/s-putaim.ads: Likewise.
        * libgnat/s-putima.adb: Likewise.
        * libgnat/s-putima.ads: Likewise.
        * libgnat/s-rannum.adb: Likewise.
        * libgnat/s-rannum.ads: Likewise.
        * libgnat/s-ransee.adb: Likewise.
        * libgnat/s-ransee.ads: Likewise.
        * libgnat/s-regexp.adb: Likewise.
        * libgnat/s-regexp.ads: Likewise.
        * libgnat/s-regpat.adb: Likewise.
        * libgnat/s-regpat.ads: Likewise.
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        * libgnat/s-resfil.ads: Likewise.
        * libgnat/s-restri.adb: Likewise.
        * libgnat/s-restri.ads: Likewise.
        * libgnat/s-rident.ads: Likewise.
        * libgnat/s-rpc.adb: Likewise.
        * libgnat/s-rpc.ads: Likewise.
        * libgnat/s-scaval.adb: Likewise.
        * libgnat/s-scaval.ads: Likewise.
        * libgnat/s-scaval__128.adb: Likewise.
        * libgnat/s-scaval__128.ads: Likewise.
        * libgnat/s-secsta.adb: Likewise.
        * libgnat/s-secsta.ads: Likewise.
        * libgnat/s-sequio.adb: Likewise.
        * libgnat/s-sequio.ads: Likewise.
        * libgnat/s-shabig.ads: Likewise.
        * libgnat/s-shasto.adb: Likewise.
        * libgnat/s-shasto.ads: Likewise.
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        * libgnat/s-soflin.ads: Likewise.
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        * libgnat/s-soliin.ads: Likewise.
        * libgnat/s-sopco3.adb: Likewise.
        * libgnat/s-sopco3.ads: Likewise.
        * libgnat/s-sopco4.adb: Likewise.
        * libgnat/s-sopco4.ads: Likewise.
        * libgnat/s-sopco5.adb: Likewise.
        * libgnat/s-sopco5.ads: Likewise.
        * libgnat/s-spsufi.adb: Likewise.
        * libgnat/s-spsufi.ads: Likewise.
        * libgnat/s-stache.adb: Likewise.
        * libgnat/s-stache.ads: Likewise.
        * libgnat/s-stalib.adb: Likewise.
        * libgnat/s-stalib.ads: Likewise.
        * libgnat/s-statxd.adb: Likewise.
        * libgnat/s-statxd.ads: Likewise.
        * libgnat/s-stausa.adb: Likewise.
        * libgnat/s-stausa.ads: Likewise.
        * libgnat/s-stchop.adb: Likewise.
        * libgnat/s-stchop.ads: Likewise.
        * libgnat/s-stchop__limit.ads: Likewise.
        * libgnat/s-stchop__rtems.adb: Likewise.
        * libgnat/s-stchop__vxworks.adb: Likewise.
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        * libgnat/s-stoele.ads: Likewise.
        * libgnat/s-stopoo.adb: Likewise.
        * libgnat/s-stopoo.ads: Likewise.
        * libgnat/s-stposu.adb: Likewise.
        * libgnat/s-stposu.ads: Likewise.
        * libgnat/s-stratt.adb: Likewise.
        * libgnat/s-stratt.ads: Likewise.
        * libgnat/s-strcom.adb: Likewise.
        * libgnat/s-strcom.ads: Likewise.
        * libgnat/s-strhas.adb: Likewise.
        * libgnat/s-strhas.ads: Likewise.
        * libgnat/s-string.adb: Likewise.
        * libgnat/s-string.ads: Likewise.
        * libgnat/s-strops.adb: Likewise.
        * libgnat/s-strops.ads: Likewise.
        * libgnat/s-ststop.adb: Likewise.
        * libgnat/s-ststop.ads: Likewise.
        * libgnat/s-tasloc.adb: Likewise.
        * libgnat/s-tasloc.ads: Likewise.
        * libgnat/s-thread.ads: Likewise.
        * libgnat/s-thread__ae653.adb: Likewise.
        * libgnat/s-traceb.adb: Likewise.
        * libgnat/s-traceb.ads: Likewise.
        * libgnat/s-traceb__hpux.adb: Likewise.
        * libgnat/s-traceb__mastop.adb: Likewise.
        * libgnat/s-traent.adb: Likewise.
        * libgnat/s-traent.ads: Likewise.
        * libgnat/s-trasym.adb: Likewise.
        * libgnat/s-trasym.ads: Likewise.
        * libgnat/s-trasym__dwarf.adb: Likewise.
        * libgnat/s-tsmona.adb: Likewise.
        * libgnat/s-tsmona__linux.adb: Likewise.
        * libgnat/s-tsmona__mingw.adb: Likewise.
        * libgnat/s-unstyp.ads: Likewise.
        * libgnat/s-utf_32.adb: Likewise.
        * libgnat/s-utf_32.ads: Likewise.
        * libgnat/s-vade128.ads: Likewise.
        * libgnat/s-vade32.ads: Likewise.
        * libgnat/s-vade64.ads: Likewise.
        * libgnat/s-vafi128.ads: Likewise.
        * libgnat/s-vafi32.ads: Likewise.
        * libgnat/s-vafi64.ads: Likewise.
        * libgnat/s-valboo.adb: Likewise.
        * libgnat/s-valboo.ads: Likewise.
        * libgnat/s-valcha.adb: Likewise.
        * libgnat/s-valcha.ads: Likewise.
        * libgnat/s-valenu.adb: Likewise.
        * libgnat/s-valenu.ads: Likewise.
        * libgnat/s-valflt.ads: Likewise.
        * libgnat/s-valint.adb: Likewise.
        * libgnat/s-valint.ads: Likewise.
        * libgnat/s-vallfl.ads: Likewise.
        * libgnat/s-valllf.ads: Likewise.
        * libgnat/s-vallli.adb: Likewise.
        * libgnat/s-vallli.ads: Likewise.
        * libgnat/s-valllli.ads: Likewise.
        * libgnat/s-vallllu.ads: Likewise.
        * libgnat/s-valllu.adb: Likewise.
        * libgnat/s-valllu.ads: Likewise.
        * libgnat/s-valrea.adb: Likewise.
        * libgnat/s-valrea.ads: Likewise.
        * libgnat/s-valued.adb: Likewise.
        * libgnat/s-valued.ads: Likewise.
        * libgnat/s-valuef.adb: Likewise.
        * libgnat/s-valuef.ads: Likewise.
        * libgnat/s-valuei.adb: Likewise.
        * libgnat/s-valuei.ads: Likewise.
        * libgnat/s-valuer.adb: Likewise.
        * libgnat/s-valuer.ads: Likewise.
        * libgnat/s-valueu.adb: Likewise.
        * libgnat/s-valueu.ads: Likewise.
        * libgnat/s-valuns.adb: Likewise.
        * libgnat/s-valuns.ads: Likewise.
        * libgnat/s-valuti.adb: Likewise.
        * libgnat/s-valuti.ads: Likewise.
        * libgnat/s-valwch.adb: Likewise.
        * libgnat/s-valwch.ads: Likewise.
        * libgnat/s-veboop.adb: Likewise.
        * libgnat/s-veboop.ads: Likewise.
        * libgnat/s-vector.ads: Likewise.
        * libgnat/s-vercon.adb: Likewise.
        * libgnat/s-vercon.ads: Likewise.
        * libgnat/s-wchcnv.adb: Likewise.
        * libgnat/s-wchcnv.ads: Likewise.
        * libgnat/s-wchcon.adb: Likewise.
        * libgnat/s-wchcon.ads: Likewise.
        * libgnat/s-wchjis.adb: Likewise.
        * libgnat/s-wchjis.ads: Likewise.
        * libgnat/s-wchstw.adb: Likewise.
        * libgnat/s-wchstw.ads: Likewise.
        * libgnat/s-wchwts.adb: Likewise.
        * libgnat/s-wchwts.ads: Likewise.
        * libgnat/s-widboo.adb: Likewise.
        * libgnat/s-widboo.ads: Likewise.
        * libgnat/s-widcha.adb: Likewise.
        * libgnat/s-widcha.ads: Likewise.
        * libgnat/s-widenu.adb: Likewise.
        * libgnat/s-widenu.ads: Likewise.
        * libgnat/s-widint.ads: Likewise.
        * libgnat/s-widlli.adb: Likewise.
        * libgnat/s-widlli.ads: Likewise.
        * libgnat/s-widllli.ads: Likewise.
        * libgnat/s-widlllu.ads: Likewise.
        * libgnat/s-widllu.adb: Likewise.
        * libgnat/s-widllu.ads: Likewise.
        * libgnat/s-widthi.adb: Likewise.
        * libgnat/s-widthi.ads: Likewise.
        * libgnat/s-widthu.adb: Likewise.
        * libgnat/s-widthu.ads: Likewise.
        * libgnat/s-widuns.ads: Likewise.
        * libgnat/s-widwch.adb: Likewise.
        * libgnat/s-widwch.ads: Likewise.
        * libgnat/s-win32.ads: Likewise.
        * libgnat/s-winext.ads: Likewise.
        * libgnat/s-wwdcha.adb: Likewise.
        * libgnat/s-wwdcha.ads: Likewise.
        * libgnat/s-wwdenu.adb: Likewise.
        * libgnat/s-wwdenu.ads: Likewise.
        * libgnat/s-wwdwch.adb: Likewise.
        * libgnat/s-wwdwch.ads: Likewise.
        * libgnat/system-aix.ads: Likewise.
        * libgnat/system-darwin-arm.ads: Likewise.
        * libgnat/system-darwin-ppc.ads: Likewise.
        * libgnat/system-darwin-x86.ads: Likewise.
        * libgnat/system-djgpp.ads: Likewise.
        * libgnat/system-dragonfly-x86_64.ads: Likewise.
        * libgnat/system-freebsd.ads: Likewise.
        * libgnat/system-hpux-ia64.ads: Likewise.
        * libgnat/system-hpux.ads: Likewise.
        * libgnat/system-linux-alpha.ads: Likewise.
        * libgnat/system-linux-arm.ads: Likewise.
        * libgnat/system-linux-hppa.ads: Likewise.
        * libgnat/system-linux-ia64.ads: Likewise.
        * libgnat/system-linux-m68k.ads: Likewise.
        * libgnat/system-linux-mips.ads: Likewise.
        * libgnat/system-linux-ppc.ads: Likewise.
        * libgnat/system-linux-riscv.ads: Likewise.
        * libgnat/system-linux-s390.ads: Likewise.
        * libgnat/system-linux-sh4.ads: Likewise.
        * libgnat/system-linux-sparc.ads: Likewise.
        * libgnat/system-linux-x86.ads: Likewise.
        * libgnat/system-lynxos178-ppc.ads: Likewise.
        * libgnat/system-lynxos178-x86.ads: Likewise.
        * libgnat/system-mingw.ads: Likewise.
        * libgnat/system-qnx-aarch64.ads: Likewise.
        * libgnat/system-rtems.ads: Likewise.
        * libgnat/system-solaris-sparc.ads: Likewise.
        * libgnat/system-solaris-x86.ads: Likewise.
        * libgnat/system-vxworks-arm-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks-arm-rtp.ads: Likewise.
        * libgnat/system-vxworks-arm.ads: Likewise.
        * libgnat/system-vxworks-e500-kernel.ads: Likewise.
        * libgnat/system-vxworks-e500-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks-e500-rtp.ads: Likewise.
        * libgnat/system-vxworks-e500-vthread.ads: Likewise.
        * libgnat/system-vxworks-ppc-kernel.ads: Likewise.
        * libgnat/system-vxworks-ppc-ravenscar.ads: Likewise.
        * libgnat/system-vxworks-ppc-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks-ppc-rtp.ads: Likewise.
        * libgnat/system-vxworks-ppc-vthread.ads: Likewise.
        * libgnat/system-vxworks-ppc.ads: Likewise.
        * libgnat/system-vxworks-x86-kernel.ads: Likewise.
        * libgnat/system-vxworks-x86-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks-x86-rtp.ads: Likewise.
        * libgnat/system-vxworks-x86-vthread.ads: Likewise.
        * libgnat/system-vxworks-x86.ads: Likewise.
        * libgnat/system-vxworks7-aarch64-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks7-aarch64.ads: Likewise.
        * libgnat/system-vxworks7-arm-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks7-arm.ads: Likewise.
        * libgnat/system-vxworks7-e500-kernel.ads: Likewise.
        * libgnat/system-vxworks7-e500-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks7-e500-rtp.ads: Likewise.
        * libgnat/system-vxworks7-ppc-kernel.ads: Likewise.
        * libgnat/system-vxworks7-ppc-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks7-ppc-rtp.ads: Likewise.
        * libgnat/system-vxworks7-ppc64-kernel.ads: Likewise.
        * libgnat/system-vxworks7-ppc64-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks7-x86-kernel.ads: Likewise.
        * libgnat/system-vxworks7-x86-rtp-smp.ads: Likewise.
        * libgnat/system-vxworks7-x86-rtp.ads: Likewise.
        * libgnat/system-vxworks7-x86_64-kernel.ads: Likewise.
        * libgnat/system-vxworks7-x86_64-rtp-smp.ads: Likewise.
        * link.c: Likewise.
        * live.adb: Likewise.
        * live.ads: Likewise.
        * locales.c: Likewise.
        * make.adb: Likewise.
        * make.ads: Likewise.
        * make_util.adb: Likewise.
        * make_util.ads: Likewise.
        * makeusg.adb: Likewise.
        * makeusg.ads: Likewise.
        * mdll-fil.adb: Likewise.
        * mdll-fil.ads: Likewise.
        * mdll-utl.adb: Likewise.
        * mdll-utl.ads: Likewise.
        * mdll.adb: Likewise.
        * mdll.ads: Likewise.
        * mingw32.h: Likewise.
        * mkdir.c: Likewise.
        * namet-sp.adb: Likewise.
        * namet-sp.ads: Likewise.
        * namet.adb: Likewise.
        * namet.ads: Likewise.
        * namet.h: Likewise.
        * nlists.adb: Likewise.
        * nlists.ads: Likewise.
        * nlists.h: Likewise.
        * opt.adb: Likewise.
        * opt.ads: Likewise.
        * osint-b.adb: Likewise.
        * osint-b.ads: Likewise.
        * osint-c.adb: Likewise.
        * osint-c.ads: Likewise.
        * osint-l.adb: Likewise.
        * osint-l.ads: Likewise.
        * osint-m.adb: Likewise.
        * osint-m.ads: Likewise.
        * osint.adb: Likewise.
        * osint.ads: Likewise.
        * output.adb: Likewise.
        * output.ads: Likewise.
        * par-ch10.adb: Likewise.
        * par-ch11.adb: Likewise.
        * par-ch12.adb: Likewise.
        * par-ch13.adb: Likewise.
        * par-ch2.adb: Likewise.
        * par-ch3.adb: Likewise.
        * par-ch4.adb: Likewise.
        * par-ch5.adb: Likewise.
        * par-ch6.adb: Likewise.
        * par-ch7.adb: Likewise.
        * par-ch8.adb: Likewise.
        * par-ch9.adb: Likewise.
        * par-endh.adb: Likewise.
        * par-labl.adb: Likewise.
        * par-load.adb: Likewise.
        * par-prag.adb: Likewise.
        * par-sync.adb: Likewise.
        * par-tchk.adb: Likewise.
        * par-util.adb: Likewise.
        * par.adb: Likewise.
        * par.ads: Likewise.
        * par_sco.adb: Likewise.
        * par_sco.ads: Likewise.
        * pprint.adb: Likewise.
        * pprint.ads: Likewise.
        * prep.adb: Likewise.
        * prep.ads: Likewise.
        * prepcomp.adb: Likewise.
        * prepcomp.ads: Likewise.
        * put_scos.adb: Likewise.
        * put_scos.ads: Likewise.
        * raise-gcc.c: Likewise.
        * raise.c: Likewise.
        * raise.h: Likewise.
        * repinfo-input.adb: Likewise.
        * repinfo-input.ads: Likewise.
        * repinfo.adb: Likewise.
        * repinfo.ads: Likewise.
        * repinfo.h: Likewise.
        * restrict.adb: Likewise.
        * restrict.ads: Likewise.
        * rident.ads: Likewise.
        * rtfinal.c: Likewise.
        * rtinit.c: Likewise.
        * rtsfind.adb: Likewise.
        * rtsfind.ads: Likewise.
        * runtime.h: Likewise.
        * s-oscons-tmplt.c: Likewise.
        * sa_messages.adb: Likewise.
        * sa_messages.ads: Likewise.
        * scans.adb: Likewise.
        * scans.ads: Likewise.
        * scil_ll.adb: Likewise.
        * scil_ll.ads: Likewise.
        * scn.adb: Likewise.
        * scn.ads: Likewise.
        * scng.adb: Likewise.
        * scng.ads: Likewise.
        * scos.adb: Likewise.
        * scos.ads: Likewise.
        * scos.h: Likewise.
        * sdefault.ads: Likewise.
        * seh_init.c: Likewise.
        * sem.adb: Likewise.
        * sem.ads: Likewise.
        * sem_aggr.adb: Likewise.
        * sem_aggr.ads: Likewise.
        * sem_attr.adb: Likewise.
        * sem_attr.ads: Likewise.
        * sem_aux.adb: Likewise.
        * sem_aux.ads: Likewise.
        * sem_case.adb: Likewise.
        * sem_case.ads: Likewise.
        * sem_cat.adb: Likewise.
        * sem_cat.ads: Likewise.
        * sem_ch10.adb: Likewise.
        * sem_ch10.ads: Likewise.
        * sem_ch11.adb: Likewise.
        * sem_ch11.ads: Likewise.
        * sem_ch12.adb: Likewise.
        * sem_ch12.ads: Likewise.
        * sem_ch13.adb: Likewise.
        * sem_ch13.ads: Likewise.
        * sem_ch2.adb: Likewise.
        * sem_ch2.ads: Likewise.
        * sem_ch3.adb: Likewise.
        * sem_ch3.ads: Likewise.
        * sem_ch4.adb: Likewise.
        * sem_ch4.ads: Likewise.
        * sem_ch5.adb: Likewise.
        * sem_ch5.ads: Likewise.
        * sem_ch6.adb: Likewise.
        * sem_ch6.ads: Likewise.
        * sem_ch7.adb: Likewise.
        * sem_ch7.ads: Likewise.
        * sem_ch8.adb: Likewise.
        * sem_ch8.ads: Likewise.
        * sem_ch9.adb: Likewise.
        * sem_ch9.ads: Likewise.
        * sem_dim.adb: Likewise.
        * sem_dim.ads: Likewise.
        * sem_disp.adb: Likewise.
        * sem_disp.ads: Likewise.
        * sem_dist.adb: Likewise.
        * sem_dist.ads: Likewise.
        * sem_elab.adb: Likewise.
        * sem_elab.ads: Likewise.
        * sem_elim.adb: Likewise.
        * sem_elim.ads: Likewise.
        * sem_eval.adb: Likewise.
        * sem_eval.ads: Likewise.
        * sem_intr.adb: Likewise.
        * sem_intr.ads: Likewise.
        * sem_mech.adb: Likewise.
        * sem_mech.ads: Likewise.
        * sem_prag.adb: Likewise.
        * sem_prag.ads: Likewise.
        * sem_res.adb: Likewise.
        * sem_res.ads: Likewise.
        * sem_scil.adb: Likewise.
        * sem_scil.ads: Likewise.
        * sem_smem.adb: Likewise.
        * sem_smem.ads: Likewise.
        * sem_type.adb: Likewise.
        * sem_type.ads: Likewise.
        * sem_util.adb: Likewise.
        * sem_util.ads: Likewise.
        * sem_warn.adb: Likewise.
        * sem_warn.ads: Likewise.
        * set_targ.adb: Likewise.
        * set_targ.ads: Likewise.
        * sfn_scan.adb: Likewise.
        * sfn_scan.ads: Likewise.
        * sigtramp-armdroid.c: Likewise.
        * sigtramp-ios.c: Likewise.
        * sigtramp-qnx.c: Likewise.
        * sigtramp-vxworks.c: Likewise.
        * sigtramp.h: Likewise.
        * sinfo-cn.adb: Likewise.
        * sinfo-cn.ads: Likewise.
        * sinfo.adb: Likewise.
        * sinfo.ads: Likewise.
        * sinput-c.adb: Likewise.
        * sinput-c.ads: Likewise.
        * sinput-d.adb: Likewise.
        * sinput-d.ads: Likewise.
        * sinput-l.adb: Likewise.
        * sinput-l.ads: Likewise.
        * sinput.adb: Likewise.
        * sinput.ads: Likewise.
        * snames.adb-tmpl: Likewise.
        * snames.ads-tmpl: Likewise.
        * socket.c: Likewise.
        * spark_xrefs.adb: Likewise.
        * spark_xrefs.ads: Likewise.
        * sprint.adb: Likewise.
        * sprint.ads: Likewise.
        * stand.ads: Likewise.
        * stringt.adb: Likewise.
        * stringt.ads: Likewise.
        * stringt.h: Likewise.
        * style.adb: Likewise.
        * style.ads: Likewise.
        * styleg.adb: Likewise.
        * styleg.ads: Likewise.
        * stylesw.adb: Likewise.
        * stylesw.ads: Likewise.
        * switch-b.adb: Likewise.
        * switch-b.ads: Likewise.
        * switch-c.adb: Likewise.
        * switch-c.ads: Likewise.
        * switch-m.adb: Likewise.
        * switch-m.ads: Likewise.
        * switch.adb: Likewise.
        * switch.ads: Likewise.
        * sysdep.c: Likewise.
        * table.adb: Likewise.
        * table.ads: Likewise.
        * targext.c: Likewise.
        * targparm.adb: Likewise.
        * targparm.ads: Likewise.
        * tbuild.adb: Likewise.
        * tbuild.ads: Likewise.
        * tempdir.adb: Likewise.
        * tempdir.ads: Likewise.
        * terminals.c: Likewise.
        * tracebak.c: Likewise.
        * treepr.adb: Likewise.
        * treepr.ads: Likewise.
        * ttypes.ads: Likewise.
        * types.adb: Likewise.
        * types.ads: Likewise.
        * types.h: Likewise.
        * uintp.adb: Likewise.
        * uintp.ads: Likewise.
        * uintp.h: Likewise.
        * uname.adb: Likewise.
        * uname.ads: Likewise.
        * urealp.adb: Likewise.
        * urealp.ads: Likewise.
        * urealp.h: Likewise.
        * usage.adb: Likewise.
        * usage.ads: Likewise.
        * validsw.adb: Likewise.
        * validsw.ads: Likewise.
        * vast.adb: Likewise.
        * vast.ads: Likewise.
        * warnsw.adb: Likewise.
        * warnsw.ads: Likewise.
        * widechar.adb: Likewise.
        * widechar.ads: Likewise.
        * xeinfo.adb: Likewise.
        * xnmake.adb: Likewise.
        * xoscons.adb: Likewise.
        * xr_tabls.adb: Likewise.
        * xr_tabls.ads: Likewise.
        * xref_lib.adb: Likewise.
        * xref_lib.ads: Likewise.
        * xsinfo.adb: Likewise.
        * xsnamest.adb: Likewise.
        * xtreeprs.adb: Likewise.
        * xutil.adb: Likewise.
        * xutil.ads: Likewise.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * exp_dist.adb (Build_From_Any_Call): Remove initial value for
        Fnam; fix style.
        (Build_To_Any_Call): Remove initial value for Fnam.
        (Build_TypeCode_Call): Likewise.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * checks.adb, exp_aggr.adb, exp_attr.adb, exp_ch6.adb,
        exp_disp.adb, exp_imgv.adb, exp_util.adb, sem_attr.adb,
        sem_ch13.adb, sem_ch8.adb, sem_eval.adb, sem_scil.adb,
        sem_util.adb: Replace calls to RTE with Is_RTE.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch4.adb (Try_Object_Operation): Reuse local constant.

2021-05-03  Ed Schonberg  <schonberg@adacore.com>

        * sem_ch4.adb (Try_Object_Operation): When a prefixed call is
        overloaded and illegal, and the All_Errors flag is off, generate
        an error message if the re-analysis of some candidate
        interpretation fails to produce one.

2021-05-03  Dmitriy Anisimkov  <anisimko@adacore.com>

        * libgnat/g-casuti.adb: Replace with "pragma No_Body".
        * libgnat/g-casuti.ads: Replace with a package renaming.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * sem_attr.adb (Check_Program_Unit): Fix references to
        Concurrent_Kind and Is_Concurrent_Type; avoid repeated calls to
        Entity.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * sem_attr.adb (Check_Program_Unit): Replace tests for Task_Kind
        and Protected_Kind with a collective test for Concurrent_Kind;
        likewise, replace calls to Is_Task_Type and Is_Protected_Type
        with a collective call to Is_Concurrent_Type; simplify into a
        single membership test; add missing Entry_Kind alternative.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * sem_aggr.adb (Resolve_Record_Aggregate): Fix casing in error
        message.
        * sem_ch3.adb (Add_Internal_Interface_Entities): Fix unbalanced
        parens.
        * sem_elim.adb (Eliminate_Error_Msg): Add insertion character.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * freeze.adb (Freeze_Profile): Replace Error_Msg_NE with
        Error_Msg_N; change to continuation message.
        * sem_cat.adb, sem_ch10.adb, sem_ch12.adb, sem_ch5.adb: Replace
        calls to Error_Msg_NE with calls to Error_Msg_N.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * exp_disp.adb, sem_aggr.adb, sem_cat.adb, sem_ch10.adb,
        sem_ch12.adb, sem_ch3.adb, sem_ch4.adb, sem_ch5.adb,
        sem_ch6.adb, sem_ch8.adb, sem_ch9.adb, sem_prag.adb,
        sem_res.adb: Remove extra leading and trailing space in error
        messages.

2021-05-03  Arnaud Charlet  <charlet@adacore.com>

        * sem_prag.adb (Set_Exported): Do not warn on exporting a type.

2021-05-03  Ed Schonberg  <schonberg@adacore.com>

        * sem_warn.adb (Check_References): Do not emit warning on a
        selected component when enclosing type has no discriminant and
        type of component has partial initialization.

2021-05-03  Justin Squirek  <squirek@adacore.com>

        * contracts.adb (Build_Postconditions_Procedure): Remove
        internally generated if statement used to control finalization
        actions.
        * exp_ch6.adb (Add_Return, Expand_Non_Function_Return,
        Expand_Simple_Function_Return): Add if statement around
        _postconditions to control finalization.
        * exp_ch7.adb (Build_Finalizer): Likewise.
        * sem_prag.adb (Find_Related_Declaration_Or_Body): Add case to
        handle Context itself being a handled sequence of statements.

2021-05-03  Justin Squirek  <squirek@adacore.com>

        * sem_util.adb (In_Return_Value): Modified to detect when
        implicit dereference is specified on the return type of a
        function call within the expression being checked.

2021-05-03  Ed Schonberg  <schonberg@adacore.com>

        * exp_aggr.adb (Expand_Array_Aggregate): If the parent node of
        the aggregate is a subprogram call there is no target in which
        to build the aggregate, and it has to be expanded into component
        assignments.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * exp_prag.adb (Expand_Pragma_CUDA_Execute): Refill comments;
        remove periods after single-line comments; use procedural
        variant of Next_Entity.
        * gnat_cuda.adb: Refill comments; remove periods after
        single-line comments; replace calls to UI_From_Int with
        constants; change iteration bounds so they match the comments.
        * sem_prag.adb (Analyze_Pragma): Add checks for malformed pragma
        CUDA_Kernel aggregate; simplify processing of pragma CUDA_Global
        with Check_Arg_Count; sync comment with code for CUDA_Global.

2021-05-03  Arnaud Charlet  <charlet@adacore.com>

        * tbuild.adb (Make_Implicit_Loop_Statement): Disable restriction
        checking on dead paths.

2021-05-03  Arnaud Charlet  <charlet@adacore.com>

        * sem_util.adb (Check_Result_And_Post_State): Replace custom
        Has_In_Out_Parameter with existing Has_Out_Or_In_Out_Parameter
        flag which corresponds exactly to what we need.

2021-05-03  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/a-ztcoio.adb: Remove unused with clause.

2021-05-03  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch13.adb (Build_Predicate_Functions): Fix typo in comment.
        (Resolve_Aspect_Expressions): Fix typo in comment; remove
        redundant check for no aspects; simplify with Discard_Node.

2021-05-03  Ed Schonberg  <schonberg@adacore.com>

        * sem_util.adb (Build_Constrained_Itype): Remove prior patch,
        issue is better handled in Sem_Ch13.Build_Predicate_Functions.
        * sem_ch13.adb (Build_Predicate_Functions): Do not build
        predicate function for an Itype with a defined
        Predicated_Parent, even if that designated parent does not yet
        have a Predicate_Function. This can happen in instance bodies
        nested within a generic unit.

2021-04-29  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_attr.adb (Expand_N_Attribute_Reference)
        <Attribute_Max_Size_In_Storage_Elements>: Apply the checks for
        universal integer contexts only in the default case.
        * exp_ch4.adb (Get_Size_For_Range): Move to library level.
        (Expand_N_Type_Conversion): If the operand has Universal_Integer
        type and the conversion requires an overflow check, try to do an
        intermediate conversion to a narrower type.

2021-04-29  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch3.adb (Check_Anonymous_Access_Component): Factor out
        core processing of Check_Anonymous_Access_Components.
        (Check_Anonymous_Access_Components): Call
        Check_Anonymous_Access_Component.
        (Process_Discriminants): Call Check_Anonymous_Access_Component.
        * freeze.adb (Freeze_Record_Type): Code cleanups and add more tree
        checking to handle changes in sem_ch3.adb.
        * sem_ch8.adb (Find_Type): Remove special case for access
        discriminant in task types, these are now supported.

2021-04-29  Eric Botcazou  <ebotcazou@adacore.com>

        * exp_ch4.adb (Expand_Compare_Minimize_Eliminate_Overflow): Remove
        entry condition.
        (Expand_N_In): Call Minimized_Eliminated_Overflow_Check on the left
        operand before doing the special overflow expansion.
        (Expand_N_Op_Eq): Likewise.
        (Expand_N_Op_Ge): Likewise.
        (Expand_N_Op_Gt): Likewise.
        (Expand_N_Op_Le): Likewise.
        (Expand_N_Op_Lt): Likewise.
        (Expand_N_Op_Ne): Likewise.
        (Minimized_Eliminated_Overflow_Check): Return False for Minimized
        if the size of the type is greater than that of Long_Long_Integer.

2021-04-29  Arnaud Charlet  <charlet@adacore.com>

        * exp_ch5.adb (Expand_N_If_Statement): Only perform the
        simplification on return True/False for internal nodes when
        -fpreserve-control-flow is not set.

2021-04-29  Eric Botcazou  <ebotcazou@adacore.com>

        * sem_attr.adb (Eval_Attribute) <Attribute_Machine>: Use
        Round_Even instead of Round in the call to the Machine routine.

2021-04-29  Bob Duff  <duff@adacore.com>

        * sem_attr.adb (Analyze_Attribute): Change "$" to "&".
        Otherwise, Errout will trip over an uninitialized (invalid)
        variable (Error_Msg_Unit_1).

2021-04-29  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-valuer.adb (Scan_Decimal_Digits): Set Extra to zero
        when the precision limit is reached by means of trailing zeros
        and prevent it from being overwritten later.

2021-04-29  Yannick Moy  <moy@adacore.com>

        * errout.adb (Output_Messages): Insert SGR strings where needed.
        * erroutc.adb (Output_Message_Txt): Insert SGR strings where
        needed in the text of the message itself.
        (Output_Msg_Text): Allow for style message not to start
        with (style).
        * erroutc.ads: Add new constants and functions to control colors
        in messages output to the terminal. Add variable Use_SGR_Control
        that should be set to True for using SGR color control strings.

2021-04-29  Yannick Moy  <moy@adacore.com>

        * sem_eval.adb (Check_Non_Static_Context_For_Overflow): Apply
        compile-time checking for overflows in non-static contexts
        including inlined code.
        (Eval_Arithmetic_Op): Use the new procedure.
        (Eval_Unary_Op, Eval_Op_Expon): Add call to the new procedure.

2021-04-29  Justin Squirek  <squirek@adacore.com>

        * checks.adb (Apply_Type_Conversion_Checks): Move out constraint
        check generation, and add case for general access types with
        constraints.
        (Make_Discriminant_Constraint_Check): Created to centralize
        generation of constraint checks for stored discriminants.

2021-04-29  Eric Botcazou  <ebotcazou@adacore.com>

        * gnat1drv.adb (Adjust_Global_Switches): Force a 32-bit Duration
        type if the maximum integer size is lower than 64 bits.

2021-04-29  Arnaud Charlet  <charlet@adacore.com>

        * Makefile.rtl (ADA_EXCLUDE_SRCS): Remove unused files.
        (ADA_INCLUDE_SRCS): Remove libgnat/system.ads

2021-04-29  Arnaud Charlet  <charlet@adacore.com>

        * exp_aggr.adb (Collect_Initialization_Statements): Removed.
        (Convert_Aggr_In_Object_Decl, Expand_Array_Aggregate): Fix
        creation and insertion of Initialization_Statements.  Do not set
        Initialization_Statements when a transient scope is involved.
        Move processing of Array_Slice here.  Ensure that an object with
        an Array_Slice call gets its array component initialized.  Add
        comments.
        * exp_ch7.adb: Update comments.
        (Store_Actions_In_Scope): Deal properly with an empty list which
        might now be generated by Convert_Aggr_In_Object_Decl.
        * exp_ch3.adb: Update comments.
        (Expand_N_Object_Declaration): Remove processing of Array_Slice.

2021-04-29  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch8.adb (Analyze_Object_Renaming): Update check for
        AI12-0401.

2021-04-29  Patrick Bernardi  <bernardi@adacore.com>

        * libgnat/s-stoele.ads (Storage_Offset): Cleanup comment.

2021-04-29  Gary Dismukes  <dismukes@adacore.com>

        * exp_util.adb (Add_Own_DIC): Relax the suppression of adding a
        DIC Check pragma that's done for abstract types by still doing
        it in the case where GNATprove_Mode is set.

2021-04-29  Joel Brobecker  <brobecker@adacore.com>

        * Makefile.rtl (ADA_EXCLUDE_SRCS): Remove s-gcc.adb, s-gcc.ads,
        s-gccdiv.adb, s-gccdiv.ads, s-gccshi.adb and s-gccshi.ads.

2021-04-29  Piotr Trojanek  <trojanek@adacore.com>

        * layout.adb (Layout_Type): Refine type of a local variable with
        the required size of object from Int to Pos (it is initialized
        with 8 and only multiplied by 2); fix unbalanced parens in
        comment.

2021-04-29  Eric Botcazou  <ebotcazou@adacore.com>

        * eval_fat.adb (Succ): Use Ureal_Half in a couple of places.

2021-04-29  Ed Schonberg  <schonberg@adacore.com>

        * sem_util.adb (Build_Constrained_Itype): Inhibit the generation
        of predicate functions for this Itype, which is created for an
        aggregate of a discriminated type. The object to which the
        aggregate is assigned, e.g a writable actual parameter, will
        apply the predicates if any are inherited from the base type.

2021-04-29  Piotr Trojanek  <trojanek@adacore.com>

        * sem_cat.adb (Set_Categorization_From_Pragmas): Remove special
        case for generic child units; remove optimization for empty list
        of pragmas; properly restore visibility.

2021-04-29  Piotr Trojanek  <trojanek@adacore.com>

        * sem_elab.adb (Process_SPARK_Instantiation): Fix typo in
        comment.
        * sem_prag.adb (Find_Related_Context): Add missing reference to
        No_Caching in the comment; handle pragmas on compilation units.

2021-04-29  Piotr Trojanek  <trojanek@adacore.com>

        * doc/gnat_rm/implementation_defined_attributes.rst: Change all
        occurrences of "permissible prefix" to "allowed prefix", for
        consistency.
        * gnat_rm.texi: Regenerate.

2021-04-29  Eric Botcazou  <ebotcazou@adacore.com>

        * eval_fat.adb (Succ): Add a special case for zero if the type does
        not support denormalized numbers.  Always use the canonical formula
        in other cases and add commentary throughout the function.

2021-04-29  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-fatgen.adb: Remove with clause for Interfaces and
        use type clauses for Interfaces.Unsigned_{16,32,64}.
        (Small16): Remove.
        (Small32): Likewise
        (Small64): Likewise.
        (Small80): Likewise.
        (Tiny16): Likewise.
        (Tiny32): Likewise.
        (Tiny64): Likewise.
        (Tiny80): Likewise.
        (Siz): Always use 16.
        (NR): New constant.
        (Rep_Last): Use it in the computation.
        (Exp_Factor): Remove special case for 80-bit.
        (Sign_Mask): Likewise.
        (Finite_Succ): New function implementing the Succ attribute for
        finite numbers.
        (Pred): Rewrite in terms of Finite_Succ.
        (Succ): Likewise.

2021-04-29  Arnaud Charlet  <charlet@adacore.com>

        * debug_a.adb (Debug_Output_Astring): Remove obsolete comment.

2021-04-29  Arnaud Charlet  <charlet@adacore.com>

        * sem_attr.adb (Check_Image_Type): Protect against empty
        Image_Type.

2021-04-29  Arnaud Charlet  <charlet@adacore.com>

        * libgnat/a-nbnbin.ads (From_Universal_Image): New.
        (Big_Integer): Update definition.
        * libgnat/a-nbnbre.ads, libgnat/a-nbnbre.adb
        (From_Universal_Image): New.
        (From_String): Remove alternate body, replaced by
        From_Universal_Image.
        (Big_Real): Update definition.

2021-04-29  Gary Dismukes  <dismukes@adacore.com>

        * sem_ch8.adb (Find_Type): Check the No_Obsolescent_Features
        restriction for 'Class applied to an untagged incomplete
        type (when Ada_Version >= Ada_2005).  Remove disabling of the
        warning message for such usage, along with the ??? comment,
        which no longer applies (because the -gnatg switch no longer
        sets Warn_On_Obsolescent_Feature).

2021-04-29  Yannick Moy  <moy@adacore.com>

        * errout.adb (Error_Msg_NEL): Extract span from node.
        (First_And_Last_Nodes): Use spans for subtype indications and
        attribute definition clauses.
        (Write_Source_Code_Lines): Fix for tabulation characters. Change
        output for large spans to skip intermediate lines.
        * sem_case.adb (Check_Choice_Set): Report duplicate choice on
        the Original_Node for the case.
        (Generic_Check_Choices): Set the Original_Node for the rewritten
        case, so that the subtree used in spans has the correct
        locations.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch13.adb, sem_util.adb: Fix style.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * nlists.ads (List_Length): Adapt comment to match the
        behaviour.

2021-04-28  Arnaud Charlet  <charlet@adacore.com>

        * sem_eval.adb (Eval_Selected_Component): Only consider compile
        time known aggregates.

2021-04-28  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-fatgen.adb: Add use clause for Interfaces.Unsigned_16
        and Interfaces.Unsigned_32.
        (Small16): New constant.
        (Small32): Likewise.
        (Small64): Likewise.
        (Small80): Likewise.
        (Pred): Declare a local overlay for Small and return it negated
        for zero if the type does not support denormalized numbers.
        (Succ): Likewise, but return it directly.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * inline.adb (Formal_Is_Used_Once): Refine type of the counter
        variable; remove redundant assignment.

2021-04-28  Patrick Bernardi  <bernardi@adacore.com>

        * libgnarl/s-interr.adb (Install_Restricted_Handlers): Change
        Prio parameter to type Interrupt_Priority.
        * libgnarl/s-interr.ads (Install_Restricted_Handlers): Likewise.
        * libgnarl/s-interr__dummy.adb (Install_Restricted_Handlers):
        Likewise.
        * libgnarl/s-interr__hwint.adb (Install_Restricted_Handlers):
        Likewise.
        * libgnarl/s-interr__sigaction.adb (Install_Restricted_Handlers):
        Likewise.
        * libgnarl/s-interr__vxworks.adb (Install_Restricted_Handlers):
        Likewise.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * sem_type.ads (Write_Interp_Ref): Removed; no longer needed.
        * sem_type.adb (Headers): Removed; now the hash table is
        directly in the Interp_Map alone.
        (Interp_Map): Now an instance of the GNAT.HTable.Simple_HTable.
        (Last_Overloaded): New variable to emulate Interp_Map.Last.
        (Add_One_Interp): Adapt to new data structure.
        (Get_First_Interp): Likewise.
        (Hash): Likewise.
        (Init_Interp_Tables): Likewise.
        (New_Interps): Likewise.
        (Save_Interps): Likewise; handle O_N variable like in
        Get_First_Interp.
        (Write_Interp_Ref): Removed; no longer needed.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * inline.adb (Do_Reset_Calls): Now an instance of Traverse_Proc.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch13.adb (Analyze_Aspect_Static): Reuse
        Error_Msg_Ada_2020_Feature for aspect Static.
        (Analyze_One_Aspect): Likewise for aspect Full_Access.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch13.adb (Analyze_Aspect_Static): Refactor to have a
        single check for the expression being present; adapt comments.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch13.adb (Analyze_Aspect_Static): Use aspect name in the
        error message.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * sem_eval.adb (Eval_Selected_Component): Simplify with
        Unqualify.

2021-04-28  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-valrea.adb (Fast2Sum): New function.
        (Integer_to_Real): Use it in an iterated addition with exact
        error handling for the case where an extra digit is needed.
        Move local variable now only used in the exponentiation case.

2021-04-28  Yannick Moy  <moy@adacore.com>

        * errout.adb: (Error_Msg_Internal): Use span instead of
        location.
        (Error_Msg, Error_Msg_NEL): Add versions with span parameter.
        (Error_Msg_F, Error_Msg_FE, Error_Msg_N, Error_Msg_NE,
        Error_Msg_NW): Retrieve span from node.
        (First_Node): Use the new First_And_Last_Nodes.
        (First_And_Last_Nodes): Expand on previous First_Node. Apply to
        other nodes than expressions.
        (First_Sloc): Protect against inconsistent locations.
        (Last_Node): New function based on First_And_Last_Nodes.
        (Last_Sloc): New function similar to First_Sloc.
        (Output_Messages): Update output when -gnatdF is used. Use
        character ~ for making the span visible, similar to what is done
        in GCC and Clang.
        * errout.ads (Error_Msg, Error_Msg_NEL): Add versions with span
        parameter.
        (First_And_Last_Nodes, Last_Node, Last_Sloc): New subprograms.
        * erroutc.adb: Adapt to Sptr field being a span.
        * erroutc.ads (Error_Msg_Object): Change field Sptr from
        location to span.
        * errutil.adb: Adapt to Sptr field being a span.
        * freeze.adb: Use Errout reporting procedures for nodes to get
        spans.
        * par-ch3.adb: Likewise.
        * par-prag.adb: Likewise.
        * par-util.adb: Likewise.
        * sem_case.adb: Likewise.
        * sem_ch13.adb: Likewise.
        * sem_ch3.adb: Likewise.
        * sem_prag.adb: Likewise.
        * types.ads: (Source_Span): New type for spans.
        (To_Span): Basic constructors for spans.

2021-04-28  Arnaud Charlet  <charlet@adacore.com>

        * einfo.adb (Discriminant_Constraint): Refine assertion.

2021-04-28  Gary Dismukes  <dismukes@adacore.com>

        * exp_util.adb (Add_Own_DIC): Suppress expansion of a DIC pragma
        when the pragma occurs for an abstract type, since that could
        lead to a call to an abstract function, and such DIC checks can
        never be performed for abstract types in any case.
        * sem_disp.adb (Check_Dispatching_Context): Suppress the check
        for illegal calls to abstract subprograms when the call occurs
        within a Default_Initial_Condition aspect and the call is passed
        the current instance as an actual.
        (Has_Controlling_Current_Instance_Actual): New function to test
        a call to see if it has any actuals given by direct references
        to a current instance of a type
        * sem_res.adb (Resolve_Actuals): Issue an error for a call
        within a DIC aspect to a nonprimitive subprogram with an actual
        given by the name of the DIC type's current instance (which will
        show up as a reference to the formal parameter of a DIC
        procedure).

2021-04-28  Ed Schonberg  <schonberg@adacore.com>

        * exp_ch3.adb (Expand_Record_Extension): Set Parent_Subtype on
        the type extension when within a generic unit, even though
        expansion is disabled, to allow for proper resolution of
        selected components inherited from an ancestor.

2021-04-28  Arnaud Charlet  <charlet@adacore.com>

        * sem_aux.adb (Is_Limited_Type): Fix logic to check Is_Type
        before assuming Ent is a typo.
        * sem_ch4.adb (Analyze_Expression_With_Actions): Update
        comments, minor reformatting.
        * sem_res.adb (Resolve_Declare_Expression): Add protection
        against no type.

2021-04-28  Arnaud Charlet  <charlet@adacore.com>

        * exp_ch6.adb: Fix typo in comment.
        * sem_ch3.adb (Access_Subprogram_Declaration): Add missing call
        to Create_Extra_Formals. Remove obsolete bootstrap check.
        * sem_eval.adb (Eval_Selected_Component): Simplify a
        selected_component on an aggregate.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * fmap.ads (Reset_Tables): Remove outdated references to
        GNSA/ASIS.
        * sem_eval.ads (Initialize): Likewise.
        * sem_type.adb (Headers): Remove initialization at elaboration.
        * sem_type.ads (Init_Interp_Tables): Remove outdated reference
        to gnatf.
        * stringt.ads (Initialize): Fix style in comment.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * sem_res.ads: Update reference in comment.
        * sem_type.ads: Fix casing in a name of a unit.

2021-04-28  Yannick Moy  <moy@adacore.com>

        * ghost.adb (Check_Ghost_Context): Add continuation message when
        in predicate.

2021-04-28  Eric Botcazou  <ebotcazou@adacore.com>

        * libgnat/s-valrea.adb (Integer_to_Real): Use a subtype of Num
        for the component type of the table of powers of ten.
        * libgnat/s-valuer.adb (Round_Extra): Add assertion on Base.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * sem_ch5.adb (Analyze_Case_Statement): Extend optimization to
        all objects; fix typo in comment.

2021-04-28  Piotr Trojanek  <trojanek@adacore.com>

        * exp_ch9.adb (Build_Barrier_Function): Refine type of a
        protected type entity.
        (Is_Pure_Barrier): Fix style.

2021-04-28  Bob Duff  <duff@adacore.com>

        * exp_ch3.adb (Simple_Init_Defaulted_Type): Simplify the code,
        and always use OK_Convert_To, rather than Unchecked_Convert_To
        and Convert_To.

2021-04-28  Arnaud Charlet  <charlet@adacore.com>

        * sem_ch3.adb (Analyze_Object_Declaration): Remove dead code.
        * ali.ads, ali.adb (Scan_ALI): Remove unused parameters.
        Remove unused code related to Xref lines.
        (Get_Typeref): Removed, no longer used.

2021-04-28  Arnaud Charlet  <charlet@adacore.com>

        * exp_attr.adb (Build_Array_VS_Func, Build_Record_VS_Func,
        Expand_N_Attribute_Reference): Use Get_Fullest_View instead of
        Validated_View.
        (Build_Record_VS_Func): Adjust to keep using Validated_View.
        (Expand_N_Attribute_Reference) [Valid]: Use
        Small_Integer_Type_For to allow for more compile time
        evaluations.
        * sem_util.adb (Cannot_Raise_Constraint_Error): Add more precise
        support for N_Indexed_Component and fix support for
        N_Selected_Component which wasn't completely safe.
        (List_Cannot_Raise_CE): New.
        * libgnat/i-cobol.adb (Valid_Packed): Simplify test to address
        new GNAT warning.

2021-04-28  Arnaud Charlet  <charlet@adacore.com>

        * .gitignore: New.
        * doc/share/conf.py: Add Python 3 compatibility.
        * doc/share/gnat.sty: Add missing file.

2021-04-28  Richard Wai  <richard@annexi-strayline.com>

        * libgnat/a-cohase.ads (Cursor): Synchronize comments for the Cursor
        type definition to be consistent with identical definitions in other
        container packages. Add additional comments regarding the importance of
        maintaining the "Position" component for predefined equality.
        * libgnat/a-cohama.ads (Cursor): Likewise.
        * libgnat/a-cihama.ads (Cursor): Likewise.
        * libgnat/a-cohase.adb (Find, Insert): Ensure that Cursor objects
        always have their "Position" component set to ensure predefined
        equality works as required.
        * libgnat/a-cohama.adb (Find, Insert): Likewise.
        * libgnat/a-cihama.adb (Find, Insert): Likewise.

2021-04-28  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_subprog_type): Do not demote a
        const or pure function because of a parameter whose type is pointer
        to function.
        * gcc-interface/trans.c (Call_to_gnu): Do not put back a conversion
        between an actual and a formal that are unconstrained array types.
        (gnat_gimplify_expr) <CALL_EXPR>: New case.
        * gcc-interface/utils2.c (build_binary_op): Do not use |= operator.
        (gnat_stabilize_reference_1): Likewise.
        (gnat_rewrite_reference): Likewise.
        (build_unary_op): Do not clear existing TREE_CONSTANT on the result.
        (gnat_build_constructor): Also accept the address of a constant
        CONSTRUCTOR as constant element.

2021-04-28  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (is_array_of_scalar_type): New predicate.
        (find_decls_r): New function.
        (return_slot_opt_for_pure_call_p): New predicate.
        (Call_to_gnu): Do not create a temporary for the return value if the
        parent node is an aggregate.  If there is a target, try to apply the
        return slot optimization to regular calls to pure functions returning
        an array of scalar type.

2021-04-28  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (language_function): Add comment.
        (loop_info_d): Add fndecl and invariants fields.
        (find_loop_for): Test fndecl instead of the context of var.
        (find_loop): New function.
        (Regular_Loop_to_gnu): Fold back into...
        (Loop_Statement_to_gnu): ...this.  Emit invariants on entry, if any.
        (gnat_to_gnu) <N_Selected_Component>: Record nonconstant invariant
        offset computations in loops when optimization is enabled.
        * gcc-interface/utils2.c (gnat_invariant_expr): Handle BIT_AND_EXPR.

2021-04-20  Martin Liska  <mliska@suse.cz>

        * gnatvsn.ads: Bump Library_Version to 12.

2021-04-13  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/misc.c (gnat_init): Set default range bits to 0.
        * gcc-interface/trans.c (extract_encoding): Delete.
        (decode_name): Likewise.
        (File_Name_to_gnu): New function.
        (gigi): Call it to translate file names.  Replace assertion on
        1-1 mapping between files and line maps with conditional error.

2021-04-11  Gerald Pfeifer  <gerald@pfeifer.com>

        * gnat_ugn.texi (Top): Avoid invalid "up" link.

2021-03-29  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/99802
        * freeze.adb (Is_Full_Access_Aggregate): Call Is_Full_Access_Object
        on the name of an N_Assignment_Statement to spot full access.

2021-03-10  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity): Build a TYPE_STUB_DECL
        for the main variant of an enumeration type declared as volatile.

2021-03-09  Mikael Pettersson  <mikpelinux@gmail.com>

        * raise-gcc.c: On Cygwin include mingw32.h to prevent
        windows.h from including x86intrin.h or emmintrin.h.

2021-03-05  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/99264
        * init.c (__gnat_alternate_sta) [Linux]: Remove preprocessor test on
        MINSIGSTKSZ and bump size to 32KB.
        * libgnarl/s-osinte__linux.ads (Alternate_Stack_Size): Bump to 32KB.

2021-03-02  Mikael Pettersson  <mikpelinux@gmail.com>

        PR bootstrap/98590
        * cstreams.c: Ensure fileno_unlocked() is visible on Cygwin.

2021-03-02  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/99095
        * sem_ch8.adb (Check_Constrained_Object): Restrict again the special
        optimization for limited types to non-array types except in the case
        of an extended return statement.

2021-03-02  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/99020
        * sem_ch3.adb (Build_Discriminated_Subtype): Set the Cloned_Subtype
        only if the type is not private.

2021-02-26  YunQiang Su  <yunqiang.su@cipunited.com>

        PR ada/98996
        * Makefile.rtl: <mips*-*-linux*>
        add 128Bit operation file for MIPS N64 and N32 to
        LIBGNAT_TARGET_PAIRS and EXTRA_GNATRTL_NONTASKING_OBJS

2021-02-12  Arnaud Charlet  <charlet@adacore.com>

        * repinfo.ads, repinfo.adb (*SO_Ref*): Restore.

2021-02-03  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (components_to_record): If the first component
        with rep clause is the _Parent field with variable size, temporarily
        set it aside when computing the internal layout of the REP part again.
        * gcc-interface/utils.c (finish_record_type): Revert to taking the
        maximum when merging sizes for all record types with rep clause.
        (merge_sizes): Put SPECIAL parameter last and adjust recursive calls.

2021-02-03  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_entity) <E_Array_Type>: Make the
        two fields of the fat pointer type addressable, and do not make the
        template type read-only.
        <E_Record_Type>: If the type has discriminants mark it as may_alias.
        * gcc-interface/utils.c (make_dummy_type): Likewise.
        (build_dummy_unc_pointer_types): Likewise.

2021-01-26  Marius Hillenbrand  <mhillen@linux.ibm.com>

        PR ada/98228
        * gcc-interface/utils.c (maybe_pad_type): Test the size of the new
        packable type instead of its alignment for addressability's sake.

2021-01-25  Eric Botcazou  <ebotcazou@adacore.com>

        * gcc-interface/trans.c (make_covariant_thunk): Set the DECL_CONTEXT
        of the parameters and do not set TREE_PUBLIC on the thunk.
        (maybe_make_gnu_thunk): Pass the alias to the covariant thunk.
        * gcc-interface/utils.c (finish_subprog_decl): Set the DECL_CONTEXT
        of the parameters here...
        (begin_subprog_body): ...instead of here.

2021-01-19  Eric Botcazou  <ebotcazou@adacore.com>

        PR ada/98740
        * gcc-interface/trans.c (add_decl_expr): Always mark TYPE_ADA_SIZE.

2021-01-14  Sebastian Huber  <sebastian.huber@embedded-brains.de>

        PR ada/98595
        * Makefile.rtl (LIBGNAT_TARGET_PAIRS) <riscv*-*-rtems*>: Use
        wraplf version of Aux_Long_Long_Float.

2021-01-03  Eric Botcazou  <ebotcazou@adacore.com>

        * gnatvsn.ads: Bump copyright year.

2021-01-01  Jakub Jelinek  <jakub@redhat.com>

        * gnat_ugn.texi: Bump @copying's copyright year.
        * gnat_rm.texi: Likewise.

2021-01-01  Jakub Jelinek  <jakub@redhat.com>

        * ChangeLog-2020: Rotate ChangeLog.  New file.
\f
Copyright (C) 2021 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
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