1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2013 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef GCC_TREE_CORE_H
21 #define GCC_TREE_CORE_H
26 #include "statistics.h"
28 #include "double-int.h"
30 #include "fixed-value.h"
35 /* This file contains all the data structures that define the 'tree' type.
36 There are no accessor macros nor functions in this file. Only the
37 basic data structures, extern declarations and type definitions. */
39 /*---------------------------------------------------------------------------
40 Forward type declarations. Mostly to avoid including unnecessary headers
41 ---------------------------------------------------------------------------*/
46 struct range_info_def
;
51 /*---------------------------------------------------------------------------
53 ---------------------------------------------------------------------------*/
54 /* Nonzero if this is a call to a function whose return value depends
55 solely on its arguments, has no side effects, and does not read
56 global memory. This corresponds to TREE_READONLY for function
58 #define ECF_CONST (1 << 0)
60 /* Nonzero if this is a call to "pure" function (like const function,
61 but may read memory. This corresponds to DECL_PURE_P for function
63 #define ECF_PURE (1 << 1)
65 /* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no
66 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P
68 #define ECF_LOOPING_CONST_OR_PURE (1 << 2)
70 /* Nonzero if this call will never return. */
71 #define ECF_NORETURN (1 << 3)
73 /* Nonzero if this is a call to malloc or a related function. */
74 #define ECF_MALLOC (1 << 4)
76 /* Nonzero if it is plausible that this is a call to alloca. */
77 #define ECF_MAY_BE_ALLOCA (1 << 5)
79 /* Nonzero if this is a call to a function that won't throw an exception. */
80 #define ECF_NOTHROW (1 << 6)
82 /* Nonzero if this is a call to setjmp or a related function. */
83 #define ECF_RETURNS_TWICE (1 << 7)
85 /* Nonzero if this call replaces the current stack frame. */
86 #define ECF_SIBCALL (1 << 8)
88 /* Function does not read or write memory (but may have side effects, so
89 it does not necessarily fit ECF_CONST). */
90 #define ECF_NOVOPS (1 << 9)
92 /* The function does not lead to calls within current function unit. */
93 #define ECF_LEAF (1 << 10)
95 /* Nonzero if this call does not affect transactions. */
96 #define ECF_TM_PURE (1 << 11)
98 /* Nonzero if this call is into the transaction runtime library. */
99 #define ECF_TM_BUILTIN (1 << 12)
101 /* Call argument flags. */
102 /* Nonzero if the argument is not dereferenced recursively, thus only
103 directly reachable memory is read or written. */
104 #define EAF_DIRECT (1 << 0)
106 /* Nonzero if memory reached by the argument is not clobbered. */
107 #define EAF_NOCLOBBER (1 << 1)
109 /* Nonzero if the argument does not escape. */
110 #define EAF_NOESCAPE (1 << 2)
112 /* Nonzero if the argument is not used by the function. */
113 #define EAF_UNUSED (1 << 3)
115 /* Call return flags. */
116 /* Mask for the argument number that is returned. Lower two bits of
117 the return flags, encodes argument slots zero to three. */
118 #define ERF_RETURN_ARG_MASK (3)
120 /* Nonzero if the return value is equal to the argument number
121 flags & ERF_RETURN_ARG_MASK. */
122 #define ERF_RETURNS_ARG (1 << 2)
124 /* Nonzero if the return value does not alias with anything. Functions
125 with the malloc attribute have this set on their return value. */
126 #define ERF_NOALIAS (1 << 3)
129 /*---------------------------------------------------------------------------
131 ---------------------------------------------------------------------------*/
132 /* Codes of tree nodes. */
133 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
134 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
137 #include "all-tree.def"
142 #undef END_OF_BASE_TREE_CODES
144 /* Number of language-independent tree codes. */
145 #define NUM_TREE_CODES \
146 ((int) LAST_AND_UNUSED_TREE_CODE)
148 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
149 (tree_contains_struct[(CODE)][(STRUCT)])
152 /* Classify which part of the compiler has defined a given builtin function.
153 Note that we assume below that this is no more than two bits. */
154 enum built_in_class
{
161 /* Last marker used for LTO stremaing of built_in_class. We can not add it
162 to the enum since we need the enumb to fit in 2 bits. */
163 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
165 /* Codes that identify the various built in functions
166 so that expand_call can identify them quickly. */
167 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
168 enum built_in_function
{
169 #include "builtins.def"
171 /* Complex division routines in libgcc. These are done via builtins
172 because emit_library_call_value can't handle complex values. */
173 BUILT_IN_COMPLEX_MUL_MIN
,
174 BUILT_IN_COMPLEX_MUL_MAX
175 = BUILT_IN_COMPLEX_MUL_MIN
176 + MAX_MODE_COMPLEX_FLOAT
177 - MIN_MODE_COMPLEX_FLOAT
,
179 BUILT_IN_COMPLEX_DIV_MIN
,
180 BUILT_IN_COMPLEX_DIV_MAX
181 = BUILT_IN_COMPLEX_DIV_MIN
182 + MAX_MODE_COMPLEX_FLOAT
183 - MIN_MODE_COMPLEX_FLOAT
,
185 /* Upper bound on non-language-specific builtins. */
190 /* Tree code classes. Each tree_code has an associated code class
191 represented by a TREE_CODE_CLASS. */
192 enum tree_code_class
{
193 tcc_exceptional
, /* An exceptional code (fits no category). */
194 tcc_constant
, /* A constant. */
195 /* Order of tcc_type and tcc_declaration is important. */
196 tcc_type
, /* A type object code. */
197 tcc_declaration
, /* A declaration (also serving as variable refs). */
198 tcc_reference
, /* A reference to storage. */
199 tcc_comparison
, /* A comparison expression. */
200 tcc_unary
, /* A unary arithmetic expression. */
201 tcc_binary
, /* A binary arithmetic expression. */
202 tcc_statement
, /* A statement expression, which have side effects
203 but usually no interesting value. */
204 tcc_vl_exp
, /* A function call or other expression with a
205 variable-length operand vector. */
206 tcc_expression
/* Any other expression. */
209 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
210 the tables omp_clause_num_ops and omp_clause_code_name. */
211 enum omp_clause_code
{
212 /* Clause zero is special-cased inside the parser
213 (c_parser_omp_variable_list). */
214 OMP_CLAUSE_ERROR
= 0,
216 /* OpenMP clause: private (variable_list). */
219 /* OpenMP clause: shared (variable_list). */
222 /* OpenMP clause: firstprivate (variable_list). */
223 OMP_CLAUSE_FIRSTPRIVATE
,
225 /* OpenMP clause: lastprivate (variable_list). */
226 OMP_CLAUSE_LASTPRIVATE
,
228 /* OpenMP clause: reduction (operator:variable_list).
229 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
230 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
231 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
233 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
234 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}. */
235 OMP_CLAUSE_REDUCTION
,
237 /* OpenMP clause: copyin (variable_list). */
240 /* OpenMP clause: copyprivate (variable_list). */
241 OMP_CLAUSE_COPYPRIVATE
,
243 /* OpenMP clause: linear (variable-list[:linear-step]). */
246 /* OpenMP clause: uniform (argument-list). */
249 /* OpenMP clause: if (scalar-expression). */
252 /* OpenMP clause: num_threads (integer-expression). */
253 OMP_CLAUSE_NUM_THREADS
,
255 /* OpenMP clause: schedule. */
258 /* OpenMP clause: nowait. */
261 /* OpenMP clause: ordered. */
264 /* OpenMP clause: default. */
267 /* OpenMP clause: collapse (constant-integer-expression). */
270 /* OpenMP clause: untied. */
273 /* OpenMP clause: final (scalar-expression). */
276 /* OpenMP clause: mergeable. */
277 OMP_CLAUSE_MERGEABLE
,
279 /* OpenMP clause: safelen (constant-integer-expression). */
282 /* Internally used only clause, holding SIMD uid. */
287 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
288 enum tree_node_structure_enum
{
289 #include "treestruct.def"
294 enum omp_clause_schedule_kind
{
295 OMP_CLAUSE_SCHEDULE_STATIC
,
296 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
297 OMP_CLAUSE_SCHEDULE_GUIDED
,
298 OMP_CLAUSE_SCHEDULE_AUTO
,
299 OMP_CLAUSE_SCHEDULE_RUNTIME
302 enum omp_clause_default_kind
{
303 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
304 OMP_CLAUSE_DEFAULT_SHARED
,
305 OMP_CLAUSE_DEFAULT_NONE
,
306 OMP_CLAUSE_DEFAULT_PRIVATE
,
307 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
310 /* There is a TYPE_QUAL value for each type qualifier. They can be
311 combined by bitwise-or to form the complete set of qualifiers for a
314 TYPE_UNQUALIFIED
= 0x0,
315 TYPE_QUAL_CONST
= 0x1,
316 TYPE_QUAL_VOLATILE
= 0x2,
317 TYPE_QUAL_RESTRICT
= 0x4
320 /* Enumerate visibility settings. */
321 #ifndef SYMBOL_VISIBILITY_DEFINED
322 #define SYMBOL_VISIBILITY_DEFINED
323 enum symbol_visibility
{
325 VISIBILITY_PROTECTED
,
329 #endif // SYMBOL_VISIBILITY_DEFINED
331 /* Standard named or nameless data types of the C compiler. */
353 TI_INTEGER_MINUS_ONE
,
370 TI_COMPLEX_INTEGER_TYPE
,
371 TI_COMPLEX_FLOAT_TYPE
,
372 TI_COMPLEX_DOUBLE_TYPE
,
373 TI_COMPLEX_LONG_DOUBLE_TYPE
,
381 TI_LONG_DOUBLE_PTR_TYPE
,
391 TI_VA_LIST_GPR_COUNTER_FIELD
,
392 TI_VA_LIST_FPR_COUNTER_FIELD
,
395 TI_POINTER_SIZED_TYPE
,
400 TI_DFLOAT32_PTR_TYPE
,
401 TI_DFLOAT64_PTR_TYPE
,
402 TI_DFLOAT128_PTR_TYPE
,
415 TI_SAT_ULLFRACT_TYPE
,
431 TI_SAT_ULLACCUM_TYPE
,
477 TI_OPTIMIZATION_DEFAULT
,
478 TI_OPTIMIZATION_CURRENT
,
479 TI_TARGET_OPTION_DEFAULT
,
480 TI_TARGET_OPTION_CURRENT
,
481 TI_CURRENT_TARGET_PRAGMA
,
482 TI_CURRENT_OPTIMIZE_PRAGMA
,
487 /* An enumeration of the standard C integer types. These must be
488 ordered so that shorter types appear before longer ones, and so
489 that signed types appear before unsigned ones, for the correct
490 functioning of interpret_integer() in c-lex.c. */
491 enum integer_type_kind
{
502 itk_unsigned_long_long
,
508 /* A pointer-to-function member type looks like:
515 If __pfn is NULL, it is a NULL pointer-to-member-function.
517 (Because the vtable is always the first thing in the object, we
518 don't need its offset.) If the function is virtual, then PFN is
519 one plus twice the index into the vtable; otherwise, it is just a
520 pointer to the function.
522 Unfortunately, using the lowest bit of PFN doesn't work in
523 architectures that don't impose alignment requirements on function
524 addresses, or that use the lowest bit to tell one ISA from another,
525 for example. For such architectures, we use the lowest bit of
526 DELTA instead of the lowest bit of the PFN, and DELTA will be
528 enum ptrmemfunc_vbit_where_t
{
529 ptrmemfunc_vbit_in_pfn
,
530 ptrmemfunc_vbit_in_delta
533 /* Flags that may be passed in the third argument of decl_attributes, and
534 to handler functions for attributes. */
535 enum attribute_flags
{
536 /* The type passed in is the type of a DECL, and any attributes that
537 should be passed in again to be applied to the DECL rather than the
538 type should be returned. */
539 ATTR_FLAG_DECL_NEXT
= 1,
540 /* The type passed in is a function return type, and any attributes that
541 should be passed in again to be applied to the function type rather
542 than the return type should be returned. */
543 ATTR_FLAG_FUNCTION_NEXT
= 2,
544 /* The type passed in is an array element type, and any attributes that
545 should be passed in again to be applied to the array type rather
546 than the element type should be returned. */
547 ATTR_FLAG_ARRAY_NEXT
= 4,
548 /* The type passed in is a structure, union or enumeration type being
549 created, and should be modified in place. */
550 ATTR_FLAG_TYPE_IN_PLACE
= 8,
551 /* The attributes are being applied by default to a library function whose
552 name indicates known behavior, and should be silently ignored if they
553 are not in fact compatible with the function type. */
554 ATTR_FLAG_BUILT_IN
= 16,
555 /* A given attribute has been parsed as a C++-11 attribute. */
559 /* Types used to represent sizes. */
560 enum size_type_kind
{
561 stk_sizetype
, /* Normal representation of sizes in bytes. */
562 stk_ssizetype
, /* Signed representation of sizes in bytes. */
563 stk_bitsizetype
, /* Normal representation of sizes in bits. */
564 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
568 enum operand_equal_flag
{
571 OEP_CONSTANT_ADDRESS_OF
= 4
574 /* Enum and arrays used for tree allocation stats.
575 Keep in sync with tree.c:tree_node_kind_names. */
576 enum tree_node_kind
{
597 /*---------------------------------------------------------------------------
599 ---------------------------------------------------------------------------*/
600 /* When processing aliases at the symbol table level, we need the
601 declaration of target. For this reason we need to queue aliases and
602 process them after all declarations has been produced. */
603 typedef struct GTY(()) alias_pair
{
608 /* An initialization priority. */
609 typedef unsigned short priority_type
;
611 /* The type of a callback function for walking over tree structure. */
612 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
614 /* The type of a callback function that represents a custom walk_tree. */
615 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
616 void *, struct pointer_set_t
*);
619 /*---------------------------------------------------------------------------
621 ---------------------------------------------------------------------------*/
622 /* A tree node can represent a data type, a variable, an expression
623 or a statement. Each node has a TREE_CODE which says what kind of
624 thing it represents. Some common codes are:
625 INTEGER_TYPE -- represents a type of integers.
626 ARRAY_TYPE -- represents a type of pointer.
627 VAR_DECL -- represents a declared variable.
628 INTEGER_CST -- represents a constant integer value.
629 PLUS_EXPR -- represents a sum (an expression).
631 As for the contents of a tree node: there are some fields
632 that all nodes share. Each TREE_CODE has various special-purpose
633 fields as well. The fields of a node are never accessed directly,
634 always through accessor macros. */
636 /* Every kind of tree node starts with this structure,
637 so all nodes have these fields.
639 See the accessor macros, defined below, for documentation of the
640 fields, and the table below which connects the fields and the
643 struct GTY(()) tree_base
{
644 ENUM_BITFIELD(tree_code
) code
: 16;
646 unsigned side_effects_flag
: 1;
647 unsigned constant_flag
: 1;
648 unsigned addressable_flag
: 1;
649 unsigned volatile_flag
: 1;
650 unsigned readonly_flag
: 1;
651 unsigned asm_written_flag
: 1;
652 unsigned nowarning_flag
: 1;
653 unsigned visited
: 1;
655 unsigned used_flag
: 1;
656 unsigned nothrow_flag
: 1;
657 unsigned static_flag
: 1;
658 unsigned public_flag
: 1;
659 unsigned private_flag
: 1;
660 unsigned protected_flag
: 1;
661 unsigned deprecated_flag
: 1;
662 unsigned default_def_flag
: 1;
665 /* The bits in the following structure should only be used with
666 accessor macros that constrain inputs with tree checking. */
668 unsigned lang_flag_0
: 1;
669 unsigned lang_flag_1
: 1;
670 unsigned lang_flag_2
: 1;
671 unsigned lang_flag_3
: 1;
672 unsigned lang_flag_4
: 1;
673 unsigned lang_flag_5
: 1;
674 unsigned lang_flag_6
: 1;
675 unsigned saturating_flag
: 1;
677 unsigned unsigned_flag
: 1;
678 unsigned packed_flag
: 1;
679 unsigned user_align
: 1;
680 unsigned nameless_flag
: 1;
685 /* This field is only used with TREE_TYPE nodes; the only reason it is
686 present in tree_base instead of tree_type is to save space. The size
687 of the field must be large enough to hold addr_space_t values. */
688 unsigned address_space
: 8;
690 /* The following fields are present in tree_base to save space. The
691 nodes using them do not require any of the flags above and so can
692 make better use of the 4-byte sized word. */
693 /* VEC length. This field is only used with TREE_VEC. */
695 /* SSA version number. This field is only used with SSA_NAME. */
696 unsigned int version
;
700 /* The following table lists the uses of each of the above flags and
701 for which types of nodes they are defined.
706 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
709 CONSTRUCTOR, IDENTIFIER_NODE
712 CALL_EXPR_TAILCALL in
718 PREDICT_EXPR_OUTCOME in
724 VAR_DECL, FUNCTION_DECL
727 TREE_NO_TRAMPOLINE in
733 TREE_SYMBOL_REFERENCED in
737 TARGET_EXPR, WITH_CLEANUP_EXPR
739 TRY_CATCH_IS_CLEANUP in
745 TYPE_REF_CAN_ALIAS_ALL in
746 POINTER_TYPE, REFERENCE_TYPE
754 TRANSACTION_EXPR_OUTER in
760 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
763 VAR_DECL, FUNCTION_DECL
769 CALL_EXPR_VA_ARG_PACK in
772 TYPE_CACHED_VALUES_P in
775 SAVE_EXPR_RESOLVED_P in
778 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
779 OMP_CLAUSE_LASTPRIVATE
781 OMP_CLAUSE_PRIVATE_DEBUG in
784 OMP_CLAUSE_LINEAR_NO_COPYIN in
787 TRANSACTION_EXPR_RELAXED in
795 CALL_EXPR_RETURN_SLOT_OPT in
801 OMP_PARALLEL_COMBINED in
804 OMP_CLAUSE_PRIVATE_OUTER_REF in
807 OMP_CLAUSE_LINEAR_NO_COPYOUT in
810 TYPE_REF_IS_RVALUE in
822 CALL_FROM_THUNK_P and
823 CALL_ALLOCA_FOR_VAR_P in
838 TREE_THIS_VOLATILE in
861 TYPE_SIZES_GIMPLIFIED in
875 VAR_DECL, FUNCTION_DECL, TYPE_DECL
876 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
879 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
899 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
901 SSA_NAME_IN_FREELIST in
910 IDENTIFIER_TRANSPARENT_ALIAS in
916 all trees (used liberally by many passes)
923 VAR_DECL_IS_VIRTUAL_OPERAND in
937 TYPE_VECTOR_OPAQUE in
940 SSA_NAME_IS_DEFAULT_DEF in
943 DECL_NONLOCAL_FRAME in
947 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
950 struct GTY(()) tree_typed
{
951 struct tree_base base
;
955 struct GTY(()) tree_common
{
956 struct tree_typed typed
;
960 struct GTY(()) tree_int_cst
{
961 struct tree_typed typed
;
966 struct GTY(()) tree_real_cst
{
967 struct tree_typed typed
;
968 struct real_value
* real_cst_ptr
;
971 struct GTY(()) tree_fixed_cst
{
972 struct tree_typed typed
;
973 struct fixed_value
* fixed_cst_ptr
;
976 struct GTY(()) tree_string
{
977 struct tree_typed typed
;
982 struct GTY(()) tree_complex
{
983 struct tree_typed typed
;
988 struct GTY(()) tree_vector
{
989 struct tree_typed typed
;
990 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
993 struct GTY(()) tree_identifier
{
994 struct tree_common common
;
995 struct ht_identifier id
;
998 struct GTY(()) tree_list
{
999 struct tree_common common
;
1004 struct GTY(()) tree_vec
{
1005 struct tree_common common
;
1006 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1009 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1010 element. INDEX can optionally design the position of VALUE: in arrays,
1011 it is the index where VALUE has to be placed; in structures, it is the
1012 FIELD_DECL of the member. */
1013 typedef struct GTY(()) constructor_elt_d
{
1018 struct GTY(()) tree_constructor
{
1019 struct tree_typed typed
;
1020 vec
<constructor_elt
, va_gc
> *elts
;
1023 struct GTY(()) tree_exp
{
1024 struct tree_typed typed
;
1026 tree
GTY ((special ("tree_exp"),
1027 desc ("TREE_CODE ((tree) &%0)")))
1031 /* Immediate use linking structure. This structure is used for maintaining
1032 a doubly linked list of uses of an SSA_NAME. */
1033 typedef struct GTY(()) ssa_use_operand_d
{
1034 struct ssa_use_operand_d
* GTY((skip(""))) prev
;
1035 struct ssa_use_operand_d
* GTY((skip(""))) next
;
1036 /* Immediate uses for a given SSA name are maintained as a cyclic
1037 list. To recognize the root of this list, the location field
1038 needs to point to the original SSA name. Since statements and
1039 SSA names are of different data types, we need this union. See
1040 the explanation in struct immediate_use_iterator_d. */
1041 union { gimple stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1042 tree
*GTY((skip(""))) use
;
1043 } ssa_use_operand_t
;
1045 struct GTY(()) tree_ssa_name
{
1046 struct tree_typed typed
;
1048 /* _DECL wrapped by this SSA name. */
1051 /* Statement that defines this SSA name. */
1054 /* Value range information. */
1055 union ssa_name_info_type
{
1056 /* Pointer attributes used for alias analysis. */
1057 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1058 /* Value range attributes used for zero/sign extension elimination. */
1059 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1060 } GTY ((desc ("%1.typed.type ?" \
1061 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1063 /* Immediate uses list for this SSA_NAME. */
1064 struct ssa_use_operand_d imm_uses
;
1067 struct GTY(()) phi_arg_d
{
1068 /* imm_use MUST be the first element in struct because we do some
1069 pointer arithmetic with it. See phi_arg_index_from_use. */
1070 struct ssa_use_operand_d imm_use
;
1075 struct GTY(()) tree_omp_clause
{
1076 struct tree_common common
;
1078 enum omp_clause_code code
;
1079 union omp_clause_subcode
{
1080 enum omp_clause_default_kind default_kind
;
1081 enum omp_clause_schedule_kind schedule_kind
;
1082 enum tree_code reduction_code
;
1083 } GTY ((skip
)) subcode
;
1085 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1087 gimple_seq gimple_reduction_init
;
1088 gimple_seq gimple_reduction_merge
;
1090 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1094 struct GTY(()) tree_block
{
1095 struct tree_base base
;
1098 unsigned abstract_flag
: 1;
1099 unsigned block_num
: 31;
1104 vec
<tree
, va_gc
> *nonlocalized_vars
;
1108 tree abstract_origin
;
1109 tree fragment_origin
;
1110 tree fragment_chain
;
1113 struct GTY(()) tree_type_common
{
1114 struct tree_common common
;
1120 unsigned int precision
: 10;
1121 unsigned no_force_blk_flag
: 1;
1122 unsigned needs_constructing_flag
: 1;
1123 unsigned transparent_aggr_flag
: 1;
1124 unsigned restrict_flag
: 1;
1125 unsigned contains_placeholder_bits
: 2;
1127 ENUM_BITFIELD(machine_mode
) mode
: 8;
1129 unsigned string_flag
: 1;
1130 unsigned lang_flag_0
: 1;
1131 unsigned lang_flag_1
: 1;
1132 unsigned lang_flag_2
: 1;
1133 unsigned lang_flag_3
: 1;
1134 unsigned lang_flag_4
: 1;
1135 unsigned lang_flag_5
: 1;
1136 unsigned lang_flag_6
: 1;
1139 alias_set_type alias_set
;
1142 union tree_type_symtab
{
1143 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1144 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1145 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1146 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1154 struct GTY(()) tree_type_with_lang_specific
{
1155 struct tree_type_common common
;
1156 /* Points to a structure whose details depend on the language in use. */
1157 struct lang_type
*lang_specific
;
1160 struct GTY(()) tree_type_non_common
{
1161 struct tree_type_with_lang_specific with_lang_specific
;
1168 struct GTY (()) tree_binfo
{
1169 struct tree_common common
;
1175 vec
<tree
, va_gc
> *base_accesses
;
1181 vec
<tree
, va_gc
> base_binfos
;
1184 struct GTY(()) tree_decl_minimal
{
1185 struct tree_common common
;
1192 struct GTY(()) tree_decl_common
{
1193 struct tree_decl_minimal common
;
1196 ENUM_BITFIELD(machine_mode
) mode
: 8;
1198 unsigned nonlocal_flag
: 1;
1199 unsigned virtual_flag
: 1;
1200 unsigned ignored_flag
: 1;
1201 unsigned abstract_flag
: 1;
1202 unsigned artificial_flag
: 1;
1203 unsigned preserve_flag
: 1;
1204 unsigned debug_expr_is_from
: 1;
1206 unsigned lang_flag_0
: 1;
1207 unsigned lang_flag_1
: 1;
1208 unsigned lang_flag_2
: 1;
1209 unsigned lang_flag_3
: 1;
1210 unsigned lang_flag_4
: 1;
1211 unsigned lang_flag_5
: 1;
1212 unsigned lang_flag_6
: 1;
1213 unsigned lang_flag_7
: 1;
1214 unsigned lang_flag_8
: 1;
1216 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1217 unsigned decl_flag_0
: 1;
1218 /* In FIELD_DECL, this is DECL_BIT_FIELD
1219 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1220 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1221 unsigned decl_flag_1
: 1;
1222 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1223 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1224 DECL_HAS_VALUE_EXPR_P. */
1225 unsigned decl_flag_2
: 1;
1227 unsigned decl_flag_3
: 1;
1228 /* Logically, these two would go in a theoretical base shared by var and
1230 unsigned gimple_reg_flag
: 1;
1231 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1232 unsigned decl_by_reference_flag
: 1;
1233 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1234 unsigned decl_read_flag
: 1;
1235 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1236 unsigned decl_nonshareable_flag
: 1;
1238 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1239 unsigned int off_align
: 8;
1241 /* 24 bits unused. */
1243 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1246 /* UID for points-to sets, stable over copying from inlining. */
1247 unsigned int pt_uid
;
1252 tree abstract_origin
;
1254 /* Points to a structure whose details depend on the language in use. */
1255 struct lang_decl
*lang_specific
;
1258 struct GTY(()) tree_decl_with_rtl
{
1259 struct tree_decl_common common
;
1263 struct GTY(()) tree_field_decl
{
1264 struct tree_decl_common common
;
1267 tree bit_field_type
;
1273 struct GTY(()) tree_label_decl
{
1274 struct tree_decl_with_rtl common
;
1276 int eh_landing_pad_nr
;
1279 struct GTY(()) tree_result_decl
{
1280 struct tree_decl_with_rtl common
;
1283 struct GTY(()) tree_const_decl
{
1284 struct tree_decl_common common
;
1287 struct GTY(()) tree_parm_decl
{
1288 struct tree_decl_with_rtl common
;
1292 struct GTY(()) tree_decl_with_vis
{
1293 struct tree_decl_with_rtl common
;
1294 tree assembler_name
;
1298 /* Belong to VAR_DECL exclusively. */
1299 unsigned defer_output
: 1;
1300 unsigned hard_register
: 1;
1301 unsigned common_flag
: 1;
1302 unsigned in_text_section
: 1;
1303 unsigned in_constant_pool
: 1;
1304 unsigned dllimport_flag
: 1;
1305 /* Don't belong to VAR_DECL exclusively. */
1306 unsigned weak_flag
: 1;
1307 /* When SECTION_NAME is implied by -ffunction-section. */
1308 unsigned implicit_section_name_p
: 1;
1310 unsigned seen_in_bind_expr
: 1;
1311 unsigned comdat_flag
: 1;
1312 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1313 unsigned visibility_specified
: 1;
1314 /* Belongs to VAR_DECL exclusively. */
1315 ENUM_BITFIELD(tls_model
) tls_model
: 3;
1317 /* Belong to FUNCTION_DECL exclusively. */
1318 unsigned init_priority_p
: 1;
1319 /* Used by C++ only. Might become a generic decl flag. */
1320 unsigned shadowed_for_var_p
: 1;
1321 /* Belong to FUNCTION_DECL exclusively. */
1322 unsigned cxx_constructor
: 1;
1323 /* Belong to FUNCTION_DECL exclusively. */
1324 unsigned cxx_destructor
: 1;
1325 /* Belong to FUNCTION_DECL exclusively. */
1327 /* 11 unused bits. */
1330 struct GTY(()) tree_var_decl
{
1331 struct tree_decl_with_vis common
;
1334 struct GTY(()) tree_decl_non_common
{
1335 struct tree_decl_with_vis common
;
1336 /* C++ uses this in namespaces. */
1338 /* C++ uses this in templates. */
1340 /* Almost all FE's use this. */
1342 /* C++ uses this in namespaces and function_decls. */
1346 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1347 arguments/result/saved_tree fields by front ends. It was either inherit
1348 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1349 which seemed a bit strange. */
1351 struct GTY(()) tree_function_decl
{
1352 struct tree_decl_non_common common
;
1356 /* The personality function. Used for stack unwinding. */
1359 /* Function specific options that are used by this function. */
1360 tree function_specific_target
; /* target options */
1361 tree function_specific_optimization
; /* optimization options */
1363 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1364 DECL_FUNCTION_CODE. Otherwise unused.
1365 ??? The bitfield needs to be able to hold all target function
1367 ENUM_BITFIELD(built_in_function
) function_code
: 11;
1368 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1370 unsigned static_ctor_flag
: 1;
1371 unsigned static_dtor_flag
: 1;
1372 unsigned uninlinable
: 1;
1374 unsigned possibly_inlined
: 1;
1375 unsigned novops_flag
: 1;
1376 unsigned returns_twice_flag
: 1;
1377 unsigned malloc_flag
: 1;
1378 unsigned operator_new_flag
: 1;
1379 unsigned declared_inline_flag
: 1;
1380 unsigned regdecl_flag
: 1;
1381 unsigned no_inline_warning_flag
: 1;
1383 unsigned no_instrument_function_entry_exit
: 1;
1384 unsigned no_limit_stack
: 1;
1385 unsigned disregard_inline_limits
: 1;
1386 unsigned pure_flag
: 1;
1387 unsigned looping_const_or_pure_flag
: 1;
1388 unsigned has_debug_args_flag
: 1;
1389 unsigned tm_clone_flag
: 1;
1390 unsigned versioned_function
: 1;
1394 struct GTY(()) tree_translation_unit_decl
{
1395 struct tree_decl_common common
;
1396 /* Source language of this translation unit. Used for DWARF output. */
1397 const char * GTY((skip(""))) language
;
1398 /* TODO: Non-optimization used to build this translation unit. */
1399 /* TODO: Root of a partial DWARF tree for global types and decls. */
1402 struct GTY(()) tree_type_decl
{
1403 struct tree_decl_non_common common
;
1407 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1409 struct tree_statement_list_node
*prev
;
1410 struct tree_statement_list_node
*next
;
1414 struct GTY(()) tree_statement_list
1416 struct tree_typed typed
;
1417 struct tree_statement_list_node
*head
;
1418 struct tree_statement_list_node
*tail
;
1422 /* Optimization options used by a function. */
1424 struct GTY(()) tree_optimization_option
{
1425 struct tree_common common
;
1427 /* The optimization options used by the user. */
1428 struct cl_optimization opts
;
1430 /* Target optabs for this set of optimization options. This is of
1431 type `struct target_optabs *'. */
1432 unsigned char *GTY ((atomic
)) optabs
;
1434 /* The value of this_target_optabs against which the optabs above were
1436 struct target_optabs
*GTY ((skip
)) base_optabs
;
1439 /* Target options used by a function. */
1441 struct GTY(()) tree_target_option
{
1442 struct tree_common common
;
1444 /* The optimization options used by the user. */
1445 struct cl_target_option opts
;
1448 /* Define the overall contents of a tree node.
1449 It may be any of the structures declared above
1450 for various types of node. */
1451 union GTY ((ptr_alias (union lang_tree_node
),
1452 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1453 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1454 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1455 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1456 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1457 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1458 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1459 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1460 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1461 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1462 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1463 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1464 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1465 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1466 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1468 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1469 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1470 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1471 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1472 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1473 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1474 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1475 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1476 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1477 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1478 translation_unit_decl
;
1479 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1480 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1481 type_with_lang_specific
;
1482 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1484 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1485 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1486 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1487 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1488 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1489 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1490 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1491 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1492 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1493 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1494 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1497 /* Structure describing an attribute and a function to handle it. */
1498 struct attribute_spec
{
1499 /* The name of the attribute (without any leading or trailing __),
1500 or NULL to mark the end of a table of attributes. */
1502 /* The minimum length of the list of arguments of the attribute. */
1504 /* The maximum length of the list of arguments of the attribute
1505 (-1 for no maximum). */
1507 /* Whether this attribute requires a DECL. If it does, it will be passed
1508 from types of DECLs, function return types and array element types to
1509 the DECLs, function types and array types respectively; but when
1510 applied to a type in any other circumstances, it will be ignored with
1511 a warning. (If greater control is desired for a given attribute,
1512 this should be false, and the flags argument to the handler may be
1513 used to gain greater control in that case.) */
1515 /* Whether this attribute requires a type. If it does, it will be passed
1516 from a DECL to the type of that DECL. */
1518 /* Whether this attribute requires a function (or method) type. If it does,
1519 it will be passed from a function pointer type to the target type,
1520 and from a function return type (which is not itself a function
1521 pointer type) to the function type. */
1522 bool function_type_required
;
1523 /* Function to handle this attribute. NODE points to the node to which
1524 the attribute is to be applied. If a DECL, it should be modified in
1525 place; if a TYPE, a copy should be created. NAME is the name of the
1526 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1527 of the arguments (which may be NULL). FLAGS gives further information
1528 about the context of the attribute. Afterwards, the attributes will
1529 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1530 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1531 as well as in any other cases when the attributes should not be added
1532 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1533 applied to another type or DECL later may be returned;
1534 otherwise the return value should be NULL_TREE. This pointer may be
1535 NULL if no special handling is required beyond the checks implied
1536 by the rest of this structure. */
1537 tree (*handler
) (tree
*node
, tree name
, tree args
,
1538 int flags
, bool *no_add_attrs
);
1539 /* Specifies if attribute affects type's identity. */
1540 bool affects_type_identity
;
1543 /* These functions allow a front-end to perform a manual layout of a
1544 RECORD_TYPE. (For instance, if the placement of subsequent fields
1545 depends on the placement of fields so far.) Begin by calling
1546 start_record_layout. Then, call place_field for each of the
1547 fields. Then, call finish_record_layout. See layout_type for the
1548 default way in which these functions are used. */
1549 typedef struct record_layout_info_s
{
1550 /* The RECORD_TYPE that we are laying out. */
1552 /* The offset into the record so far, in bytes, not including bits in
1555 /* The last known alignment of SIZE. */
1556 unsigned int offset_align
;
1557 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1559 /* The alignment of the record so far, in bits. */
1560 unsigned int record_align
;
1561 /* The alignment of the record so far, ignoring #pragma pack and
1562 __attribute__ ((packed)), in bits. */
1563 unsigned int unpacked_align
;
1564 /* The previous field laid out. */
1566 /* The static variables (i.e., class variables, as opposed to
1567 instance variables) encountered in T. */
1568 vec
<tree
, va_gc
> *pending_statics
;
1569 /* Bits remaining in the current alignment group */
1570 int remaining_in_alignment
;
1571 /* True if we've seen a packed field that didn't have normal
1572 alignment anyway. */
1573 int packed_maybe_necessary
;
1574 } *record_layout_info
;
1576 /* Iterator for going through the function arguments. */
1577 struct function_args_iterator
{
1578 tree next
; /* TREE_LIST pointing to the next argument */
1581 /* Structures to map from a tree to another tree. */
1582 struct GTY(()) tree_map_base
{
1586 /* Map from a tree to another tree. */
1588 struct GTY(()) tree_map
{
1589 struct tree_map_base base
;
1594 /* Map from a decl tree to another tree. */
1595 struct GTY(()) tree_decl_map
{
1596 struct tree_map_base base
;
1600 /* Map from a tree to an int. */
1601 struct GTY(()) tree_int_map
{
1602 struct tree_map_base base
;
1606 /* Map from a tree to initialization/finalization priorities. */
1607 struct GTY(()) tree_priority_map
{
1608 struct tree_map_base base
;
1613 /* Map from a decl tree to a tree vector. */
1614 struct GTY(()) tree_vec_map
{
1615 struct tree_map_base base
;
1616 vec
<tree
, va_gc
> *to
;
1619 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1620 have to go towards the end of tree.h so that union tree_node is fully
1621 defined by this point. */
1623 /* Structure containing iterator state. */
1624 struct call_expr_arg_iterator
{
1625 tree t
; /* the call_expr */
1626 int n
; /* argument count */
1627 int i
; /* next argument index */
1630 struct const_call_expr_arg_iterator
{
1631 const_tree t
; /* the call_expr */
1632 int n
; /* argument count */
1633 int i
; /* next argument index */
1636 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1637 function, and a flag that says if the function is available implicitly, or
1638 whether the user has to code explicit calls to __builtin_<xxx>. */
1639 struct GTY(()) builtin_info_type
{
1640 tree decl
[(int)END_BUILTINS
];
1641 bool implicit_p
[(int)END_BUILTINS
];
1645 /*---------------------------------------------------------------------------
1647 ---------------------------------------------------------------------------*/
1648 /* Matrix describing the structures contained in a given tree code. */
1649 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1651 /* Class of tree given its code. */
1652 extern const enum tree_code_class tree_code_type
[];
1654 /* Each tree code class has an associated string representation.
1655 These must correspond to the tree_code_class entries. */
1656 extern const char *const tree_code_class_strings
[];
1658 /* Number of argument-words in each kind of tree-node. */
1659 extern const unsigned char tree_code_length
[];
1661 /* Names of tree components. */
1662 extern const char *const tree_code_name
[];
1664 /* Vector of all alias pairs for global symbols. */
1665 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1667 /* Names of all the built_in classes. */
1668 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1670 /* Names of all the built_in functions. */
1671 extern const char * built_in_names
[(int) END_BUILTINS
];
1673 /* Number of operands and names for each OMP_CLAUSE node. */
1674 extern unsigned const char omp_clause_num_ops
[];
1675 extern const char * const omp_clause_code_name
[];
1677 /* A vector of all translation-units. */
1678 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1680 /* Vector of standard trees used by the C compiler. */
1681 extern GTY(()) tree global_trees
[TI_MAX
];
1683 /* The standard C integer types. Use integer_type_kind to index into
1685 extern GTY(()) tree integer_types
[itk_none
];
1687 /* Types used to represent sizes. */
1688 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1690 /* Arrays for keeping track of tree node statistics. */
1691 extern int tree_node_counts
[];
1692 extern int tree_node_sizes
[];
1694 /* True if we are in gimple form and the actions of the folders need to
1695 be restricted. False if we are not in gimple form and folding is not
1696 restricted to creating gimple expressions. */
1697 extern bool in_gimple_form
;
1699 /* Functional interface to the builtin functions. */
1700 extern GTY(()) builtin_info_type builtin_info
;
1702 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1703 extern unsigned int maximum_field_alignment
;
1705 /* Nonzero means lvalues are limited to those valid in pedantic ANSI C.
1706 Zero means allow extended lvalues. */
1707 extern int pedantic_lvalues
;
1709 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1710 extern GTY(()) tree current_function_decl
;
1712 /* Nonzero means a FUNC_BEGIN label was emitted. */
1713 extern GTY(()) const char * current_function_func_begin_label
;
1715 #endif // GCC_TREE_CORE_H