1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 with Atree
; use Atree
;
27 with Back_End
; use Back_End
;
31 with Debug
; use Debug
;
33 with Errout
; use Errout
;
36 with Fname
; use Fname
;
37 with Fname
.UF
; use Fname
.UF
;
39 with Ghost
; use Ghost
;
40 with Gnatvsn
; use Gnatvsn
;
43 with Lib
.Writ
; use Lib
.Writ
;
45 with Namet
; use Namet
;
48 with Osint
; use Osint
;
49 with Osint
.C
; use Osint
.C
;
50 with Output
; use Output
;
55 with Rident
; use Rident
;
64 with Sem_SPARK
; use Sem_SPARK
;
67 with Sinfo
; use Sinfo
;
68 with Sinput
.L
; use Sinput
.L
;
69 with Snames
; use Snames
;
70 with Sprint
; use Sprint
;
72 with Stylesw
; use Stylesw
;
73 with Targparm
; use Targparm
;
76 with Treepr
; use Treepr
;
78 with Types
; use Types
;
80 with Uname
; use Uname
;
83 with Validsw
; use Validsw
;
85 with System
.Assertions
;
93 procedure Adjust_Global_Switches
;
94 -- There are various interactions between front-end switch settings,
95 -- including debug switch settings and target dependent parameters.
96 -- This procedure takes care of properly handling these interactions.
97 -- We do it after scanning out all the switches, so that we are not
98 -- depending on the order in which switches appear.
100 procedure Check_Bad_Body
(Unit_Node
: Node_Id
; Unit_Kind
: Node_Kind
);
101 -- Called to check whether a unit described by its compilation unit node
102 -- and kind has a bad body.
104 procedure Check_Rep_Info
;
105 -- Called when we are not generating code, to check if -gnatR was requested
106 -- and if so, explain that we will not be honoring the request.
108 procedure Post_Compilation_Validation_Checks
;
109 -- This procedure performs various validation checks that have to be left
110 -- to the end of the compilation process, after generating code but before
111 -- issuing error messages. In particular, these checks generally require
112 -- the information provided by the back end in back annotation of declared
113 -- entities (e.g. actual size and alignment values chosen by the back end).
115 ----------------------------
116 -- Adjust_Global_Switches --
117 ----------------------------
119 procedure Adjust_Global_Switches
is
120 procedure SPARK_Library_Warning
(Kind
: String);
121 -- Issue a warning in GNATprove mode if the run-time library does not
122 -- fully support IEEE-754 floating-point semantics.
124 ---------------------------
125 -- SPARK_Library_Warning --
126 ---------------------------
128 procedure SPARK_Library_Warning
(Kind
: String) is
131 ("warning: run-time library may be configured incorrectly");
133 ("warning: (SPARK analysis requires support for " & Kind
& ')');
134 end SPARK_Library_Warning
;
136 -- Start of processing for Adjust_Global_Switches
139 -- Define pragma GNAT_Annotate as an alias of pragma Annotate, to be
140 -- able to work around bootstrap limitations with the old syntax of
141 -- pragma Annotate, and use pragma GNAT_Annotate in compiler sources
144 Map_Pragma_Name
(From
=> Name_Gnat_Annotate
, To
=> Name_Annotate
);
146 -- -gnatd.M enables Relaxed_RM_Semantics
148 if Debug_Flag_Dot_MM
then
149 Relaxed_RM_Semantics
:= True;
152 -- -gnatd.1 enables unnesting of subprograms
154 if Debug_Flag_Dot_1
then
155 Unnest_Subprogram_Mode
:= True;
158 -- -gnatd.u enables special C expansion mode
160 if Debug_Flag_Dot_U
then
161 Modify_Tree_For_C
:= True;
164 -- Set all flags required when generating C code
166 if Generate_C_Code
then
167 Modify_Tree_For_C
:= True;
168 Unnest_Subprogram_Mode
:= True;
169 Building_Static_Dispatch_Tables
:= False;
170 Minimize_Expression_With_Actions
:= True;
171 Expand_Nonbinary_Modular_Ops
:= True;
173 -- Set operating mode to Generate_Code to benefit from full front-end
174 -- expansion (e.g. generics).
176 Operating_Mode
:= Generate_Code
;
178 -- Suppress alignment checks since we do not have access to alignment
179 -- info on the target.
181 Suppress_Options
.Suppress
(Alignment_Check
) := False;
184 -- -gnatd.E sets Error_To_Warning mode, causing selected error messages
185 -- to be treated as warnings instead of errors.
187 if Debug_Flag_Dot_EE
then
188 Error_To_Warning
:= True;
191 -- -gnatdJ sets Include_Subprogram_In_Messages, adding the related
192 -- subprogram as part of the error and warning messages.
194 if Debug_Flag_JJ
then
195 Include_Subprogram_In_Messages
:= True;
198 -- Disable CodePeer_Mode in Check_Syntax, since we need front-end
201 if Operating_Mode
= Check_Syntax
then
202 CodePeer_Mode
:= False;
205 -- Set ASIS mode if -gnatt and -gnatc are set
207 if Operating_Mode
= Check_Semantics
and then Tree_Output
then
210 -- Set ASIS GNSA mode if -gnatd.H is set
212 if Debug_Flag_Dot_HH
then
213 ASIS_GNSA_Mode
:= True;
216 -- Turn off inlining in ASIS mode, since ASIS cannot handle the extra
217 -- information in the trees caused by inlining being active.
219 -- More specifically, the tree seems to be malformed from the ASIS
220 -- point of view if -gnatc and -gnatn appear together???
222 Inline_Active
:= False;
224 -- Turn off SCIL generation and CodePeer mode in semantics mode,
225 -- since SCIL requires front-end expansion.
227 Generate_SCIL
:= False;
228 CodePeer_Mode
:= False;
231 -- SCIL mode needs to disable front-end inlining since the generated
232 -- trees (in particular order and consistency between specs compiled
233 -- as part of a main unit or as part of a with-clause) are causing
236 if Generate_SCIL
then
237 Front_End_Inlining
:= False;
240 -- Tune settings for optimal SCIL generation in CodePeer mode
242 if CodePeer_Mode
then
244 -- Turn off gnatprove mode (which can be set via e.g. -gnatd.F), not
245 -- compatible with CodePeer mode.
247 GNATprove_Mode
:= False;
248 Debug_Flag_Dot_FF
:= False;
250 -- Turn off length expansion. CodePeer has its own mechanism to
251 -- handle length attribute.
253 Debug_Flag_Dot_PP
:= True;
255 -- Turn off C tree generation, not compatible with CodePeer mode. We
256 -- do not expect this to happen in normal use, since both modes are
257 -- enabled by special tools, but it is useful to turn off these flags
258 -- this way when we are doing CodePeer tests on existing test suites
259 -- that may have -gnateg set, to avoid the need for special casing.
261 Modify_Tree_For_C
:= False;
262 Generate_C_Code
:= False;
263 Unnest_Subprogram_Mode
:= False;
265 -- Turn off inlining, confuses CodePeer output and gains nothing
267 Front_End_Inlining
:= False;
268 Inline_Active
:= False;
270 -- Disable front-end optimizations, to keep the tree as close to the
271 -- source code as possible, and also to avoid inconsistencies between
272 -- trees when using different optimization switches.
274 Optimization_Level
:= 0;
276 -- Enable some restrictions systematically to simplify the generated
277 -- code (and ease analysis). Note that restriction checks are also
278 -- disabled in CodePeer mode, see Restrict.Check_Restriction, and
279 -- user specified Restrictions pragmas are ignored, see
280 -- Sem_Prag.Process_Restrictions_Or_Restriction_Warnings.
282 Restrict
.Restrictions
.Set
(No_Exception_Registration
) := True;
283 Restrict
.Restrictions
.Set
(No_Initialize_Scalars
) := True;
284 Restrict
.Restrictions
.Set
(No_Task_Hierarchy
) := True;
285 Restrict
.Restrictions
.Set
(No_Abort_Statements
) := True;
286 Restrict
.Restrictions
.Set
(Max_Asynchronous_Select_Nesting
) := True;
287 Restrict
.Restrictions
.Value
(Max_Asynchronous_Select_Nesting
) := 0;
289 -- Enable pragma Ignore_Pragma (Global) to support legacy code. As a
290 -- consequence, Refined_Global pragma should be ignored as well, as
291 -- it is only allowed on a body when pragma Global is given for the
294 Set_Name_Table_Boolean3
(Name_Global
, True);
295 Set_Name_Table_Boolean3
(Name_Refined_Global
, True);
297 -- Suppress division by zero checks since they are handled
298 -- implicitly by CodePeer.
300 -- Turn off dynamic elaboration checks: generates inconsistencies in
301 -- trees between specs compiled as part of a main unit or as part of
304 -- Turn off alignment checks: these cannot be proved statically by
305 -- CodePeer and generate false positives.
307 -- Enable all other language checks
309 Suppress_Options
.Suppress
:=
310 (Alignment_Check
=> True,
311 Division_Check
=> True,
312 Elaboration_Check
=> True,
315 Dynamic_Elaboration_Checks
:= False;
317 -- Set STRICT mode for overflow checks if not set explicitly. This
318 -- prevents suppressing of overflow checks by default, in code down
321 if Suppress_Options
.Overflow_Mode_General
= Not_Set
then
322 Suppress_Options
.Overflow_Mode_General
:= Strict
;
323 Suppress_Options
.Overflow_Mode_Assertions
:= Strict
;
326 -- CodePeer handles division and overflow checks directly, based on
327 -- the marks set by the frontend, hence no special expansion should
328 -- be performed in the frontend for division and overflow checks.
330 Backend_Divide_Checks_On_Target
:= True;
331 Backend_Overflow_Checks_On_Target
:= True;
333 -- Kill debug of generated code, since it messes up sloc values
335 Debug_Generated_Code
:= False;
337 -- Ditto for -gnateG which interacts badly with handling of pragma
338 -- Annotate in gnat2scil.
340 Generate_Processed_File
:= False;
342 -- Disable Exception_Extra_Info (-gnateE) which generates more
343 -- complex trees with no added value, and may confuse CodePeer.
345 Exception_Extra_Info
:= False;
347 -- Turn cross-referencing on in case it was disabled (e.g. by -gnatD)
348 -- to support source navigation.
352 -- Polling mode forced off, since it generates confusing junk
354 Polling_Required
:= False;
356 -- Set operating mode to Generate_Code to benefit from full front-end
357 -- expansion (e.g. generics).
359 Operating_Mode
:= Generate_Code
;
361 -- We need SCIL generation of course
363 Generate_SCIL
:= True;
365 -- Enable assertions, since they give CodePeer valuable extra info
367 Assertions_Enabled
:= True;
369 -- Set normal RM validity checking and checking of copies (to catch
370 -- e.g. wrong values used in unchecked conversions).
371 -- All other validity checking is turned off, since this can generate
372 -- very complex trees that only confuse CodePeer and do not bring
373 -- enough useful info.
375 Reset_Validity_Check_Options
;
376 Validity_Check_Default
:= True;
377 Validity_Check_Copies
:= True;
378 Check_Validity_Of_Parameters
:= False;
380 -- Turn off style check options and ignore any style check pragmas
381 -- since we are not interested in any front-end warnings when we are
382 -- getting CodePeer output.
384 Reset_Style_Check_Options
;
385 Ignore_Style_Checks_Pragmas
:= True;
387 -- Always perform semantics and generate ali files in CodePeer mode,
388 -- so that a gnatmake -c -k will proceed further when possible.
390 Force_ALI_Tree_File
:= True;
391 Try_Semantics
:= True;
393 -- Make the Ada front end more liberal so that the compiler will
394 -- allow illegal code that is allowed by other compilers. CodePeer
395 -- is in the business of finding problems, not enforcing rules.
396 -- This is useful when using CodePeer mode with other compilers.
398 Relaxed_RM_Semantics
:= True;
400 if not Generate_CodePeer_Messages
then
402 -- Suppress compiler warnings by default when generating SCIL for
403 -- CodePeer, except when combined with -gnateC where we do want to
404 -- emit GNAT warnings.
406 Warning_Mode
:= Suppress
;
409 -- Disable all simple value propagation. This is an optimization
410 -- which is valuable for code optimization, and also for generation
411 -- of compiler warnings, but these are being turned off by default,
412 -- and CodePeer generates better messages (referencing original
413 -- variables) this way.
414 -- Do this only if -gnatws is set (the default with -gnatcC), so that
415 -- if warnings are enabled, we'll get better messages from GNAT.
417 if Warning_Mode
= Suppress
then
418 Debug_Flag_MM
:= True;
422 -- Enable some individual switches that are implied by relaxed RM
425 if Relaxed_RM_Semantics
then
426 Opt
.Allow_Integer_Address
:= True;
427 Overriding_Renamings
:= True;
428 Treat_Categorization_Errors_As_Warnings
:= True;
431 -- Enable GNATprove_Mode when using -gnatd.F switch
433 if Debug_Flag_Dot_FF
then
434 GNATprove_Mode
:= True;
437 -- GNATprove_Mode is also activated by default in the gnat2why
440 if GNATprove_Mode
then
442 -- Turn off CodePeer mode (which can be set via e.g. -gnatC or
443 -- -gnateC), not compatible with GNATprove mode.
445 CodePeer_Mode
:= False;
446 Generate_SCIL
:= False;
448 -- Turn off C tree generation, not compatible with GNATprove mode. We
449 -- do not expect this to happen in normal use, since both modes are
450 -- enabled by special tools, but it is useful to turn off these flags
451 -- this way when we are doing GNATprove tests on existing test suites
452 -- that may have -gnateg set, to avoid the need for special casing.
454 Modify_Tree_For_C
:= False;
455 Generate_C_Code
:= False;
456 Unnest_Subprogram_Mode
:= False;
458 -- Turn off inlining, which would confuse formal verification output
461 Front_End_Inlining
:= False;
462 Inline_Active
:= False;
464 -- Issue warnings for failure to inline subprograms, as otherwise
465 -- expected in GNATprove mode for the local subprograms without
468 Ineffective_Inline_Warnings
:= True;
470 -- Do not issue warnings for possible propagation of exception.
471 -- GNATprove already issues messages about possible exceptions.
473 No_Warn_On_Non_Local_Exception
:= True;
474 Warn_On_Non_Local_Exception
:= False;
476 -- Disable front-end optimizations, to keep the tree as close to the
477 -- source code as possible, and also to avoid inconsistencies between
478 -- trees when using different optimization switches.
480 Optimization_Level
:= 0;
482 -- Enable some restrictions systematically to simplify the generated
483 -- code (and ease analysis).
485 Restrict
.Restrictions
.Set
(No_Initialize_Scalars
) := True;
487 -- Note: at this point we used to suppress various checks, but that
488 -- is not what we want. We need the semantic processing for these
489 -- checks (which will set flags like Do_Overflow_Check, showing the
490 -- points at which potential checks are required semantically). We
491 -- don't want the expansion associated with these checks, but that
492 -- happens anyway because this expansion is simply not done in the
493 -- SPARK version of the expander.
495 -- On the contrary, we need to enable explicitly all language checks,
496 -- as they may have been suppressed by the use of switch -gnatp.
498 Suppress_Options
.Suppress
:= (others => False);
500 -- Detect overflow on unconstrained floating-point types, such as
501 -- the predefined types Float, Long_Float and Long_Long_Float from
502 -- package Standard. Not necessary if float overflows are checked
503 -- (Machine_Overflow true), since appropriate Do_Overflow_Check flags
504 -- will be set in any case.
506 Check_Float_Overflow
:= not Machine_Overflows_On_Target
;
508 -- Set STRICT mode for overflow checks if not set explicitly. This
509 -- prevents suppressing of overflow checks by default, in code down
512 if Suppress_Options
.Overflow_Mode_General
= Not_Set
then
513 Suppress_Options
.Overflow_Mode_General
:= Strict
;
514 Suppress_Options
.Overflow_Mode_Assertions
:= Strict
;
517 -- Kill debug of generated code, since it messes up sloc values
519 Debug_Generated_Code
:= False;
521 -- Turn cross-referencing on in case it was disabled (e.g. by -gnatD)
522 -- as it is needed for computing effects of subprograms in the formal
523 -- verification backend.
527 -- Polling mode forced off, since it generates confusing junk
529 Polling_Required
:= False;
531 -- Set operating mode to Check_Semantics, but a light front-end
532 -- expansion is still performed.
534 Operating_Mode
:= Check_Semantics
;
536 -- Enable assertions, since they give valuable extra information for
537 -- formal verification.
539 Assertions_Enabled
:= True;
541 -- Disable validity checks, since it generates code raising
542 -- exceptions for invalid data, which confuses GNATprove. Invalid
543 -- data is directly detected by GNATprove's flow analysis.
545 Validity_Checks_On
:= False;
546 Check_Validity_Of_Parameters
:= False;
548 -- Turn off style check options since we are not interested in any
549 -- front-end warnings when we are getting SPARK output.
551 Reset_Style_Check_Options
;
553 -- Suppress the generation of name tables for enumerations, which are
554 -- not needed for formal verification, and fall outside the SPARK
555 -- subset (use of pointers).
557 Global_Discard_Names
:= True;
559 -- Suppress the expansion of tagged types and dispatching calls,
560 -- which lead to the generation of non-SPARK code (use of pointers),
561 -- which is more complex to formally verify than the original source.
563 Tagged_Type_Expansion
:= False;
565 -- Detect that the runtime library support for floating-point numbers
566 -- may not be compatible with SPARK analysis of IEEE-754 floats.
568 if Denorm_On_Target
= False then
569 SPARK_Library_Warning
("float subnormals");
571 elsif Machine_Rounds_On_Target
= False then
572 SPARK_Library_Warning
("float rounding");
574 elsif Signed_Zeros_On_Target
= False then
575 SPARK_Library_Warning
("signed zeros");
579 -- Set Configurable_Run_Time mode if system.ads flag set or if the
580 -- special debug flag -gnatdY is set.
582 if Targparm
.Configurable_Run_Time_On_Target
or Debug_Flag_YY
then
583 Configurable_Run_Time_Mode
:= True;
586 -- Set -gnatRm mode if debug flag A set
588 if Debug_Flag_AA
then
589 Back_Annotate_Rep_Info
:= True;
590 List_Representation_Info
:= 1;
591 List_Representation_Info_Mechanisms
:= True;
594 -- Force Target_Strict_Alignment true if debug flag -gnatd.a is set
596 if Debug_Flag_Dot_A
then
597 Ttypes
.Target_Strict_Alignment
:= True;
600 -- Increase size of allocated entities if debug flag -gnatd.N is set
602 if Debug_Flag_Dot_NN
then
603 Atree
.Num_Extension_Nodes
:= Atree
.Num_Extension_Nodes
+ 1;
606 -- Disable static allocation of dispatch tables if -gnatd.t is enabled.
607 -- The front end's layout phase currently treats types that have
608 -- discriminant-dependent arrays as not being static even when a
609 -- discriminant constraint on the type is static, and this leads to
610 -- problems with subtypes of type Ada.Tags.Dispatch_Table_Wrapper. ???
612 if Debug_Flag_Dot_T
then
613 Building_Static_Dispatch_Tables
:= False;
616 -- Flip endian mode if -gnatd8 set
619 Ttypes
.Bytes_Big_Endian
:= not Ttypes
.Bytes_Big_Endian
;
622 -- Set and check exception mechanism. This is only meaningful when
623 -- compiling, and in particular not meaningful for special modes used
624 -- for program analysis rather than compilation: ASIS mode, CodePeer
625 -- mode and GNATprove mode.
627 if Operating_Mode
= Generate_Code
628 and then not (ASIS_Mode
or CodePeer_Mode
or GNATprove_Mode
)
630 case Targparm
.Frontend_Exceptions_On_Target
is
632 case Targparm
.ZCX_By_Default_On_Target
is
635 ("Run-time library configured incorrectly");
637 ("(requesting support for Frontend ZCX exceptions)");
638 raise Unrecoverable_Error
;
641 Exception_Mechanism
:= Front_End_SJLJ
;
645 case Targparm
.ZCX_By_Default_On_Target
is
647 Exception_Mechanism
:= Back_End_ZCX
;
649 Exception_Mechanism
:= Back_End_SJLJ
;
654 -- Set proper status for overflow check mechanism
656 -- If already set (by -gnato or above in SPARK or CodePeer mode) then we
657 -- have nothing to do.
659 if Opt
.Suppress_Options
.Overflow_Mode_General
/= Not_Set
then
662 -- Otherwise set overflow mode defaults
665 -- Overflow checks are on by default (Suppress set False) except in
666 -- GNAT_Mode, where we want them off by default (we are not ready to
667 -- enable overflow checks in the compiler yet, for one thing the case
668 -- of 64-bit checks needs System.Arith_64 which is not a compiler
669 -- unit and it is a pain to try to include it in the compiler.
671 Suppress_Options
.Suppress
(Overflow_Check
) := GNAT_Mode
;
673 -- Set appropriate default overflow handling mode. Note: at present
674 -- we set STRICT in all three of the following cases. They are
675 -- separated because in the future we may make different choices.
677 -- By default set STRICT mode if -gnatg in effect
680 Suppress_Options
.Overflow_Mode_General
:= Strict
;
681 Suppress_Options
.Overflow_Mode_Assertions
:= Strict
;
683 -- If we have backend divide and overflow checks, then by default
684 -- overflow checks are STRICT. Historically this code used to also
685 -- activate overflow checks, although no target currently has these
686 -- flags set, so this was dead code anyway.
688 elsif Targparm
.Backend_Divide_Checks_On_Target
690 Targparm
.Backend_Overflow_Checks_On_Target
692 Suppress_Options
.Overflow_Mode_General
:= Strict
;
693 Suppress_Options
.Overflow_Mode_Assertions
:= Strict
;
695 -- Otherwise for now, default is STRICT mode. This may change in the
696 -- future, but for now this is the compatible behavior with previous
700 Suppress_Options
.Overflow_Mode_General
:= Strict
;
701 Suppress_Options
.Overflow_Mode_Assertions
:= Strict
;
705 -- Set default for atomic synchronization. As this synchronization
706 -- between atomic accesses can be expensive, and not typically needed
707 -- on some targets, an optional target parameter can turn the option
708 -- off. Note Atomic Synchronization is implemented as check.
710 Suppress_Options
.Suppress
(Atomic_Synchronization
) :=
711 not Atomic_Sync_Default_On_Target
;
713 -- Set default for Alignment_Check, if we are on a machine with non-
714 -- strict alignment, then we suppress this check, since it is over-
715 -- zealous for such machines.
717 if not Ttypes
.Target_Strict_Alignment
then
718 Suppress_Options
.Suppress
(Alignment_Check
) := True;
721 -- Set switch indicating if back end can handle limited types, and
722 -- guarantee that no incorrect copies are made (e.g. in the context
723 -- of an if or case expression).
725 -- Debug flag -gnatd.L decisively sets usage on
727 if Debug_Flag_Dot_LL
then
728 Back_End_Handles_Limited_Types
:= True;
730 -- If no debug flag, usage off for SCIL cases
732 elsif Generate_SCIL
then
733 Back_End_Handles_Limited_Types
:= False;
735 -- Otherwise normal gcc back end, for now still turn flag off by
736 -- default, since there are unresolved problems in the front end.
739 Back_End_Handles_Limited_Types
:= False;
742 -- If the inlining level has not been set by the user, compute it from
743 -- the optimization level: 1 at -O1/-O2 (and -Os), 2 at -O3 and above.
745 if Inline_Level
= 0 then
746 if Optimization_Level
< 3 then
753 -- Treat -gnatn as equivalent to -gnatN for non-GCC targets
755 if Inline_Active
and not Front_End_Inlining
then
757 -- We really should have a tag for this, what if we added a new
758 -- back end some day, it would not be true for this test, but it
759 -- would be non-GCC, so this is a bit troublesome ???
761 Front_End_Inlining
:= Generate_C_Code
;
764 -- Set back-end inlining indication
768 -- No back-end inlining available on C generation
772 -- No back-end inlining in GNATprove mode, since it just confuses
773 -- the formal verification process.
775 and then not GNATprove_Mode
777 -- No back-end inlining if front-end inlining explicitly enabled.
778 -- Done to minimize the output differences to customers still using
779 -- this deprecated switch; in addition, this behavior reduces the
780 -- output differences in old tests.
782 and then not Front_End_Inlining
784 -- Back-end inlining is disabled if debug flag .z is set
786 and then not Debug_Flag_Dot_Z
;
788 -- Output warning if -gnateE specified and cannot be supported
790 if Exception_Extra_Info
791 and then Restrict
.No_Exception_Handlers_Set
795 ("warning: extra exception information (-gnateE) was specified");
798 ("warning: this capability is not available in this configuration");
803 -- Finally capture adjusted value of Suppress_Options as the initial
804 -- value for Scope_Suppress, which will be modified as we move from
805 -- scope to scope (by Suppress/Unsuppress/Overflow_Checks pragmas).
807 Sem
.Scope_Suppress
:= Opt
.Suppress_Options
;
808 end Adjust_Global_Switches
;
814 procedure Check_Bad_Body
(Unit_Node
: Node_Id
; Unit_Kind
: Node_Kind
) is
815 Fname
: File_Name_Type
;
817 procedure Bad_Body_Error
(Msg
: String);
818 -- Issue message for bad body found
824 procedure Bad_Body_Error
(Msg
: String) is
826 Error_Msg_N
(Msg
, Unit_Node
);
827 Error_Msg_File_1
:= Fname
;
828 Error_Msg_N
("remove incorrect body in file{!", Unit_Node
);
833 Sname
: Unit_Name_Type
;
834 Src_Ind
: Source_File_Index
;
836 -- Start of processing for Check_Bad_Body
839 -- Nothing to do if we are only checking syntax, because we don't know
840 -- enough to know if we require or forbid a body in this case.
842 if Operating_Mode
= Check_Syntax
then
846 -- Check for body not allowed
848 if (Unit_Kind
= N_Package_Declaration
849 and then not Body_Required
(Unit_Node
))
850 or else (Unit_Kind
= N_Generic_Package_Declaration
851 and then not Body_Required
(Unit_Node
))
852 or else Unit_Kind
= N_Package_Renaming_Declaration
853 or else Unit_Kind
= N_Subprogram_Renaming_Declaration
854 or else Nkind
(Original_Node
(Unit
(Unit_Node
)))
855 in N_Generic_Instantiation
857 Sname
:= Unit_Name
(Main_Unit
);
859 -- If we do not already have a body name, then get the body name
861 if not Is_Body_Name
(Sname
) then
862 Sname
:= Get_Body_Name
(Sname
);
865 Fname
:= Get_File_Name
(Sname
, Subunit
=> False);
866 Src_Ind
:= Load_Source_File
(Fname
);
868 -- Case where body is present and it is not a subunit. Exclude the
869 -- subunit case, because it has nothing to do with the package we are
870 -- compiling. It is illegal for a child unit and a subunit with the
871 -- same expanded name (RM 10.2(9)) to appear together in a partition,
872 -- but there is nothing to stop a compilation environment from having
873 -- both, and the test here simply allows that. If there is an attempt
874 -- to include both in a partition, this is diagnosed at bind time. In
875 -- Ada 83 mode this is not a warning case.
877 -- Note that in general we do not give the message if the file in
878 -- question does not look like a body. This includes weird cases,
879 -- but in particular means that if the file is just a No_Body pragma,
880 -- then we won't give the message (that's the whole point of this
881 -- pragma, to be used this way and to cause the body file to be
882 -- ignored in this context).
884 if Src_Ind
> No_Source_File
885 and then Source_File_Is_Body
(Src_Ind
)
887 Errout
.Finalize
(Last_Call
=> False);
889 Error_Msg_Unit_1
:= Sname
;
891 -- Ada 83 case of a package body being ignored. This is not an
892 -- error as far as the Ada 83 RM is concerned, but it is almost
893 -- certainly not what is wanted so output a warning. Give this
894 -- message only if there were no errors, since otherwise it may
895 -- be incorrect (we may have misinterpreted a junk spec as not
896 -- needing a body when it really does).
898 if Unit_Kind
= N_Package_Declaration
899 and then Ada_Version
= Ada_83
900 and then Operating_Mode
= Generate_Code
901 and then Distribution_Stub_Mode
/= Generate_Caller_Stub_Body
902 and then not Compilation_Errors
905 ("package $$ does not require a body??", Unit_Node
);
906 Error_Msg_File_1
:= Fname
;
907 Error_Msg_N
("body in file{ will be ignored??", Unit_Node
);
909 -- Ada 95 cases of a body file present when no body is
910 -- permitted. This we consider to be an error.
913 -- For generic instantiations, we never allow a body
915 if Nkind
(Original_Node
(Unit
(Unit_Node
))) in
916 N_Generic_Instantiation
919 ("generic instantiation for $$ does not allow a body");
921 -- A library unit that is a renaming never allows a body
923 elsif Unit_Kind
in N_Renaming_Declaration
then
925 ("renaming declaration for $$ does not allow a body!");
927 -- Remaining cases are packages and generic packages. Here
928 -- we only do the test if there are no previous errors,
929 -- because if there are errors, they may lead us to
930 -- incorrectly believe that a package does not allow a
931 -- body when in fact it does.
933 elsif not Compilation_Errors
then
934 if Unit_Kind
= N_Package_Declaration
then
936 ("package $$ does not allow a body!");
938 elsif Unit_Kind
= N_Generic_Package_Declaration
then
940 ("generic package $$ does not allow a body!");
953 procedure Check_Rep_Info
is
955 if List_Representation_Info
/= 0
956 or else List_Representation_Info_Mechanisms
961 ("cannot generate representation information, no code generated");
968 ----------------------------------------
969 -- Post_Compilation_Validation_Checks --
970 ----------------------------------------
972 procedure Post_Compilation_Validation_Checks
is
974 -- Validate alignment check warnings. In some cases we generate warnings
975 -- about possible alignment errors because we don't know the alignment
976 -- that will be chosen by the back end. This routine is in charge of
977 -- getting rid of those warnings if we can tell they are not needed.
979 Checks
.Validate_Alignment_Check_Warnings
;
981 -- Validate compile time warnings and errors (using the values for size
982 -- and alignment annotated by the backend where possible). We need to
983 -- unlock temporarily these tables to reanalyze their expression.
988 Sem_Ch13
.Validate_Compile_Time_Warning_Errors
;
993 -- Validate unchecked conversions (using the values for size and
994 -- alignment annotated by the backend where possible).
996 Sem_Ch13
.Validate_Unchecked_Conversions
;
998 -- Validate address clauses (again using alignment values annotated
999 -- by the backend where possible).
1001 Sem_Ch13
.Validate_Address_Clauses
;
1003 -- Validate independence pragmas (again using values annotated by the
1004 -- back end for component layout where possible) but only for non-GCC
1005 -- back ends, as this is done a priori for GCC back ends.
1006 -- ??? We use to test for AAMP_On_Target which is now gone, consider
1008 -- if AAMP_On_Target then
1009 -- Sem_Ch13.Validate_Independence;
1011 end Post_Compilation_Validation_Checks
;
1015 Back_End_Mode
: Back_End
.Back_End_Mode_Type
;
1016 Ecode
: Exit_Code_Type
;
1018 Main_Unit_Kind
: Node_Kind
;
1019 -- Kind of main compilation unit node
1021 Main_Unit_Node
: Node_Id
;
1022 -- Compilation unit node for main unit
1024 -- Start of processing for Gnat1drv
1027 -- This inner block is set up to catch assertion errors and constraint
1028 -- errors. Since the code for handling these errors can cause another
1029 -- exception to be raised (namely Unrecoverable_Error), we need two
1030 -- nested blocks, so that the outer one handles unrecoverable error.
1033 -- Initialize all packages. For the most part, these initialization
1034 -- calls can be made in any order. Exceptions are as follows:
1036 -- Lib.Initialize need to be called before Scan_Compiler_Arguments,
1037 -- because it initializes a table filled by Scan_Compiler_Arguments.
1042 Lib
.Xref
.Initialize
;
1043 Scan_Compiler_Arguments
;
1044 Osint
.Add_Default_Search_Dirs
;
1061 Sem_Ch12
.Initialize
;
1062 Sem_Ch13
.Initialize
;
1063 Sem_Elim
.Initialize
;
1064 Sem_Eval
.Initialize
;
1065 Sem_Type
.Init_Interp_Tables
;
1067 -- Capture compilation date and time
1069 Opt
.Compilation_Time
:= System
.OS_Lib
.Current_Time_String
;
1071 -- Get the target parameters only when -gnats is not used, to avoid
1072 -- failing when there is no default runtime.
1074 if Operating_Mode
/= Check_Syntax
then
1076 -- Acquire target parameters from system.ads (package System source)
1078 Targparm_Acquire
: declare
1081 S
: Source_File_Index
;
1085 Name_Buffer
(1 .. 10) := "system.ads";
1088 S
:= Load_Source_File
(N
);
1090 -- Failed to read system.ads, fatal error
1092 if S
= No_Source_File
then
1094 ("fatal error, run-time library not installed correctly");
1095 Write_Line
("cannot locate file system.ads");
1096 raise Unrecoverable_Error
;
1098 elsif S
= No_Access_To_Source_File
then
1100 ("fatal error, run-time library not installed correctly");
1101 Write_Line
("no read access for file system.ads");
1102 raise Unrecoverable_Error
;
1104 -- Read system.ads successfully, remember its source index
1107 System_Source_File_Index
:= S
;
1110 -- Call to get target parameters. Note that the actual interface
1111 -- routines are in Tbuild. They can't be in this procedure because
1112 -- of accessibility issues.
1114 Targparm
.Get_Target_Parameters
1115 (System_Text
=> Source_Text
(S
),
1116 Source_First
=> Source_First
(S
),
1117 Source_Last
=> Source_Last
(S
),
1118 Make_Id
=> Tbuild
.Make_Id
'Access,
1119 Make_SC
=> Tbuild
.Make_SC
'Access,
1120 Set_NOD
=> Tbuild
.Set_NOD
'Access,
1121 Set_NSA
=> Tbuild
.Set_NSA
'Access,
1122 Set_NUA
=> Tbuild
.Set_NUA
'Access,
1123 Set_NUP
=> Tbuild
.Set_NUP
'Access);
1125 -- Acquire configuration pragma information from Targparm
1127 Restrict
.Restrictions
:= Targparm
.Restrictions_On_Target
;
1128 end Targparm_Acquire
;
1131 -- Perform various adjustments and settings of global switches
1133 Adjust_Global_Switches
;
1135 -- Output copyright notice if full list mode unless we have a list
1136 -- file, in which case we defer this so that it is output in the file.
1138 if (Verbose_Mode
or else (Full_List
and then Full_List_File_Name
= null))
1140 -- Debug flag gnatd7 suppresses this copyright notice
1142 and then not Debug_Flag_7
1145 Write_Str
("GNAT ");
1146 Write_Str
(Gnat_Version_String
);
1148 Write_Str
("Copyright 1992-" & Current_Year
1149 & ", Free Software Foundation, Inc.");
1153 -- Check we do not have more than one source file, this happens only in
1154 -- the case where the driver is called directly, it cannot happen when
1155 -- gnat1 is invoked from gcc in the normal case.
1157 if Osint
.Number_Of_Files
/= 1 then
1160 Osint
.Fail
("you must provide one source file");
1162 elsif Usage_Requested
then
1166 -- Generate target dependent output file if requested
1168 if Target_Dependent_Info_Write_Name
/= null then
1169 Set_Targ
.Write_Target_Dependent_Values
;
1172 -- Call the front end
1174 Original_Operating_Mode
:= Operating_Mode
;
1177 -- Exit with errors if the main source could not be parsed
1179 if Sinput
.Main_Source_File
<= No_Source_File
then
1180 Errout
.Finalize
(Last_Call
=> True);
1181 Errout
.Output_Messages
;
1182 Exit_Program
(E_Errors
);
1185 Main_Unit_Node
:= Cunit
(Main_Unit
);
1186 Main_Unit_Kind
:= Nkind
(Unit
(Main_Unit_Node
));
1188 Check_Bad_Body
(Main_Unit_Node
, Main_Unit_Kind
);
1190 -- In CodePeer mode we always delete old SCIL files before regenerating
1191 -- new ones, in case of e.g. errors, and also to remove obsolete scilx
1192 -- files generated by CodePeer itself.
1194 if CodePeer_Mode
then
1195 Comperr
.Delete_SCIL_Files
;
1198 -- Ditto for old C files before regenerating new ones
1200 if Generate_C_Code
then
1205 -- Exit if compilation errors detected
1207 Errout
.Finalize
(Last_Call
=> False);
1209 if Compilation_Errors
then
1211 Post_Compilation_Validation_Checks
;
1212 Errout
.Finalize
(Last_Call
=> True);
1213 Errout
.Output_Messages
;
1216 -- Generate ALI file if specially requested
1218 if Opt
.Force_ALI_Tree_File
then
1219 Write_ALI
(Object
=> False);
1223 Exit_Program
(E_Errors
);
1226 -- Set Generate_Code on main unit and its spec. We do this even if are
1227 -- not generating code, since Lib-Writ uses this to determine which
1228 -- units get written in the ali file.
1230 Set_Generate_Code
(Main_Unit
);
1232 -- If we have a corresponding spec, and it comes from source or it is
1233 -- not a generated spec for a child subprogram body, then we need object
1234 -- code for the spec unit as well.
1236 if Nkind
(Unit
(Main_Unit_Node
)) in N_Unit_Body
1237 and then not Acts_As_Spec
(Main_Unit_Node
)
1239 if Nkind
(Unit
(Main_Unit_Node
)) = N_Subprogram_Body
1240 and then not Comes_From_Source
(Library_Unit
(Main_Unit_Node
))
1245 (Get_Cunit_Unit_Number
(Library_Unit
(Main_Unit_Node
)));
1249 -- Case of no code required to be generated, exit indicating no error
1251 if Original_Operating_Mode
= Check_Syntax
then
1253 Errout
.Finalize
(Last_Call
=> True);
1254 Errout
.Output_Messages
;
1259 -- Use a goto instead of calling Exit_Program so that finalization
1262 goto End_Of_Program
;
1264 elsif Original_Operating_Mode
= Check_Semantics
then
1265 Back_End_Mode
:= Declarations_Only
;
1267 -- All remaining cases are cases in which the user requested that code
1268 -- be generated (i.e. no -gnatc or -gnats switch was used). Check if we
1269 -- can in fact satisfy this request.
1271 -- Cannot generate code if someone has turned off code generation for
1272 -- any reason at all. We will try to figure out a reason below.
1274 elsif Operating_Mode
/= Generate_Code
then
1275 Back_End_Mode
:= Skip
;
1277 -- We can generate code for a subprogram body unless there were missing
1278 -- subunits. Note that we always generate code for all generic units (a
1279 -- change from some previous versions of GNAT).
1281 elsif Main_Unit_Kind
= N_Subprogram_Body
1282 and then not Subunits_Missing
1284 Back_End_Mode
:= Generate_Object
;
1286 -- We can generate code for a package body unless there are subunits
1287 -- missing (note that we always generate code for generic units, which
1288 -- is a change from some earlier versions of GNAT).
1290 elsif Main_Unit_Kind
= N_Package_Body
and then not Subunits_Missing
then
1291 Back_End_Mode
:= Generate_Object
;
1293 -- We can generate code for a package declaration or a subprogram
1294 -- declaration only if it does not required a body.
1296 elsif Nkind_In
(Main_Unit_Kind
, N_Package_Declaration
,
1297 N_Subprogram_Declaration
)
1299 (not Body_Required
(Main_Unit_Node
)
1300 or else Distribution_Stub_Mode
= Generate_Caller_Stub_Body
)
1302 Back_End_Mode
:= Generate_Object
;
1304 -- We can generate code for a generic package declaration of a generic
1305 -- subprogram declaration only if does not require a body.
1307 elsif Nkind_In
(Main_Unit_Kind
, N_Generic_Package_Declaration
,
1308 N_Generic_Subprogram_Declaration
)
1309 and then not Body_Required
(Main_Unit_Node
)
1311 Back_End_Mode
:= Generate_Object
;
1313 -- Compilation units that are renamings do not require bodies, so we can
1314 -- generate code for them.
1316 elsif Nkind_In
(Main_Unit_Kind
, N_Package_Renaming_Declaration
,
1317 N_Subprogram_Renaming_Declaration
)
1319 Back_End_Mode
:= Generate_Object
;
1321 -- Compilation units that are generic renamings do not require bodies
1322 -- so we can generate code for them.
1324 elsif Main_Unit_Kind
in N_Generic_Renaming_Declaration
then
1325 Back_End_Mode
:= Generate_Object
;
1327 -- It is not an error to analyze in CodePeer mode a spec which requires
1328 -- a body, in order to generate SCIL for this spec.
1329 -- Ditto for Generate_C_Code mode and generate a C header for a spec.
1331 elsif CodePeer_Mode
or Generate_C_Code
then
1332 Back_End_Mode
:= Generate_Object
;
1334 -- It is not an error to analyze in GNATprove mode a spec which requires
1335 -- a body, when the body is not available. During frame condition
1336 -- generation, the corresponding ALI file is generated. During
1337 -- analysis, the spec is analyzed.
1339 elsif GNATprove_Mode
then
1340 Back_End_Mode
:= Declarations_Only
;
1342 -- In all other cases (specs which have bodies, generics, and bodies
1343 -- where subunits are missing), we cannot generate code and we generate
1344 -- a warning message. Note that generic instantiations are gone at this
1345 -- stage since they have been replaced by their instances.
1348 Back_End_Mode
:= Skip
;
1351 -- At this stage Back_End_Mode is set to indicate if the backend should
1352 -- be called to generate code. If it is Skip, then code generation has
1353 -- been turned off, even though code was requested by the original
1354 -- command. This is not an error from the user point of view, but it is
1355 -- an error from the point of view of the gcc driver, so we must exit
1356 -- with an error status.
1358 -- We generate an informative message (from the gcc point of view, it
1359 -- is an error message, but from the users point of view this is not an
1360 -- error, just a consequence of compiling something that cannot
1363 if Back_End_Mode
= Skip
then
1365 -- An ignored Ghost unit is rewritten into a null statement because
1366 -- it must not produce an ALI or object file. Do not emit any errors
1367 -- related to code generation because the unit does not exist.
1369 if Is_Ignored_Ghost_Unit
(Main_Unit_Node
) then
1371 -- Exit the gnat driver with success, otherwise external builders
1372 -- such as gnatmake and gprbuild will treat the compilation of an
1373 -- ignored Ghost unit as a failure. Note that this will produce
1374 -- an empty object file for the unit.
1378 -- Otherwise the unit is missing a crucial piece that prevents code
1385 Write_Str
("cannot generate code for file ");
1386 Write_Name
(Unit_File_Name
(Main_Unit
));
1388 if Subunits_Missing
then
1389 Write_Str
(" (missing subunits)");
1392 -- Force generation of ALI file, for backward compatibility
1394 Opt
.Force_ALI_Tree_File
:= True;
1396 elsif Main_Unit_Kind
= N_Subunit
then
1397 Write_Str
(" (subunit)");
1400 -- Do not generate an ALI file in this case, because it would
1401 -- become obsolete when the parent is compiled, and thus
1402 -- confuse tools such as gnatfind.
1404 elsif Main_Unit_Kind
= N_Subprogram_Declaration
then
1405 Write_Str
(" (subprogram spec)");
1408 -- Generic package body in GNAT implementation mode
1410 elsif Main_Unit_Kind
= N_Package_Body
and then GNAT_Mode
then
1411 Write_Str
(" (predefined generic)");
1414 -- Force generation of ALI file, for backward compatibility
1416 Opt
.Force_ALI_Tree_File
:= True;
1418 -- Only other case is a package spec
1421 Write_Str
(" (package spec)");
1426 Set_Standard_Output
;
1428 Post_Compilation_Validation_Checks
;
1429 Errout
.Finalize
(Last_Call
=> True);
1430 Errout
.Output_Messages
;
1434 -- Generate ALI file if specially requested, or for missing subunits,
1435 -- subunits or predefined generic.
1437 if Opt
.Force_ALI_Tree_File
then
1438 Write_ALI
(Object
=> False);
1444 -- Exit the driver with an appropriate status indicator. This will
1445 -- generate an empty object file for ignored Ghost units, otherwise
1446 -- no object file will be generated.
1448 Exit_Program
(Ecode
);
1451 -- In -gnatc mode we only do annotation if -gnatt or -gnatR is also set,
1452 -- or if -gnatwz is enabled (default setting) and there is an unchecked
1453 -- conversion that involves a type whose size is not statically known,
1454 -- as indicated by Back_Annotate_Rep_Info being set to True.
1456 -- We don't call for annotations on a subunit, because to process those
1457 -- the back end requires that the parent(s) be properly compiled.
1459 -- Annotation is suppressed for targets where front-end layout is
1460 -- enabled, because the front end determines representations.
1462 -- The back end is not invoked in ASIS mode with GNSA because all type
1463 -- representation information will be provided by the GNSA back end, not
1466 -- A special back end is always called in CodePeer and GNATprove modes,
1467 -- unless this is a subunit.
1469 if Back_End_Mode
= Declarations_Only
1471 (not (Back_Annotate_Rep_Info
or Generate_SCIL
or GNATprove_Mode
)
1472 or else Main_Unit_Kind
= N_Subunit
1473 or else ASIS_GNSA_Mode
)
1475 Post_Compilation_Validation_Checks
;
1476 Errout
.Finalize
(Last_Call
=> True);
1477 Errout
.Output_Messages
;
1478 Write_ALI
(Object
=> False);
1483 if not (Generate_SCIL
or GNATprove_Mode
) then
1490 -- Ensure that we properly register a dependency on system.ads, since
1491 -- even if we do not semantically depend on this, Targparm has read
1492 -- system parameters from the system.ads file.
1494 Lib
.Writ
.Ensure_System_Dependency
;
1496 -- Add dependencies, if any, on preprocessing data file and on
1497 -- preprocessing definition file(s).
1499 Prepcomp
.Add_Dependencies
;
1501 if GNATprove_Mode
then
1503 -- Perform the new SPARK checking rules for pointer aliasing. This is
1504 -- only activated in GNATprove mode and on SPARK code.
1506 if Debug_Flag_FF
then
1507 Check_Safe_Pointers
(Main_Unit_Node
);
1510 -- In GNATprove mode we're writing the ALI much earlier than usual
1511 -- as flow analysis needs the file present in order to append its
1512 -- own globals to it.
1514 -- Note: In GNATprove mode, an "object" file is always generated as
1515 -- the result of calling gnat1 or gnat2why, although this is not the
1516 -- same as the object file produced for compilation.
1518 Write_ALI
(Object
=> True);
1521 -- Some back ends (for instance Gigi) are known to rely on SCOs for code
1522 -- generation. Make sure they are available.
1524 if Generate_SCO
then
1525 Par_SCO
.SCO_Record_Filtered
;
1528 -- Back end needs to explicitly unlock tables it needs to touch
1542 -- Here we call the back end to generate the output code
1544 Generating_Code
:= True;
1545 Back_End
.Call_Back_End
(Back_End_Mode
);
1547 -- Once the backend is complete, we unlock the names table. This call
1548 -- allows a few extra entries, needed for example for the file name
1549 -- for the library file output.
1553 -- Generate the call-graph output of dispatching calls
1555 Exp_CG
.Generate_CG_Output
;
1557 -- Perform post compilation validation checks
1559 Post_Compilation_Validation_Checks
;
1561 -- Now we complete output of errors, rep info and the tree info. These
1562 -- are delayed till now, since it is perfectly possible for gigi to
1563 -- generate errors, modify the tree (in particular by setting flags
1564 -- indicating that elaboration is required, and also to back annotate
1565 -- representation information for List_Rep_Info).
1567 Errout
.Finalize
(Last_Call
=> True);
1568 Errout
.Output_Messages
;
1569 Repinfo
.List_Rep_Info
(Ttypes
.Bytes_Big_Endian
);
1570 Inline
.List_Inlining_Info
;
1572 -- Only write the library if the backend did not generate any error
1573 -- messages. Otherwise signal errors to the driver program so that
1574 -- there will be no attempt to generate an object file.
1576 if Compilation_Errors
then
1578 Exit_Program
(E_Errors
);
1581 if not GNATprove_Mode
then
1582 Write_ALI
(Object
=> (Back_End_Mode
= Generate_Object
));
1585 if not Compilation_Errors
then
1587 -- In case of ada backends, we need to make sure that the generated
1588 -- object file has a timestamp greater than the ALI file. We do this
1589 -- to make gnatmake happy when checking the ALI and obj timestamps,
1590 -- where it expects the object file being written after the ali file.
1592 -- Gnatmake's assumption is true for gcc platforms where the gcc
1593 -- wrapper needs to call the assembler after calling gnat1, but is
1594 -- not true for ada backends, where the object files are created
1595 -- directly by gnat1 (so are created before the ali file).
1597 Back_End
.Gen_Or_Update_Object_File
;
1600 -- Generate ASIS tree after writing the ALI file, since in ASIS mode,
1601 -- Write_ALI may in fact result in further tree decoration from the
1602 -- original tree file. Note that we dump the tree just before generating
1603 -- it, so that the dump will exactly reflect what is written out.
1608 -- Finalize name table and we are all done
1613 -- Handle fatal internal compiler errors
1615 when Rtsfind
.RE_Not_Available
=>
1616 Comperr
.Compiler_Abort
("RE_Not_Available");
1618 when System
.Assertions
.Assert_Failure
=>
1619 Comperr
.Compiler_Abort
("Assert_Failure");
1621 when Constraint_Error
=>
1622 Comperr
.Compiler_Abort
("Constraint_Error");
1624 when Program_Error
=>
1625 Comperr
.Compiler_Abort
("Program_Error");
1627 -- Assume this is a bug. If it is real, the message will in any case
1628 -- say Storage_Error, giving a strong hint.
1630 when Storage_Error
=>
1631 Comperr
.Compiler_Abort
("Storage_Error");
1633 when Unrecoverable_Error
=>
1637 Comperr
.Compiler_Abort
("exception");
1643 -- The outer exception handler handles an unrecoverable error
1646 when Unrecoverable_Error
=>
1647 Errout
.Finalize
(Last_Call
=> True);
1648 Errout
.Output_Messages
;
1651 Write_Str
("compilation abandoned");
1654 Set_Standard_Output
;
1657 Exit_Program
(E_Errors
);