1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2015 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
23 /* This file contains all the data structures that define the 'tree' type.
24 There are no accessor macros nor functions in this file. Only the
25 basic data structures, extern declarations and type definitions. */
27 /*---------------------------------------------------------------------------
28 Forward type declarations. Mostly to avoid including unnecessary headers
29 ---------------------------------------------------------------------------*/
34 struct range_info_def
;
38 /*---------------------------------------------------------------------------
40 ---------------------------------------------------------------------------*/
41 /* Nonzero if this is a call to a function whose return value depends
42 solely on its arguments, has no side effects, and does not read
43 global memory. This corresponds to TREE_READONLY for function
45 #define ECF_CONST (1 << 0)
47 /* Nonzero if this is a call to "pure" function (like const function,
48 but may read memory. This corresponds to DECL_PURE_P for function
50 #define ECF_PURE (1 << 1)
52 /* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no
53 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P
55 #define ECF_LOOPING_CONST_OR_PURE (1 << 2)
57 /* Nonzero if this call will never return. */
58 #define ECF_NORETURN (1 << 3)
60 /* Nonzero if this is a call to malloc or a related function. */
61 #define ECF_MALLOC (1 << 4)
63 /* Nonzero if it is plausible that this is a call to alloca. */
64 #define ECF_MAY_BE_ALLOCA (1 << 5)
66 /* Nonzero if this is a call to a function that won't throw an exception. */
67 #define ECF_NOTHROW (1 << 6)
69 /* Nonzero if this is a call to setjmp or a related function. */
70 #define ECF_RETURNS_TWICE (1 << 7)
72 /* Nonzero if this call replaces the current stack frame. */
73 #define ECF_SIBCALL (1 << 8)
75 /* Function does not read or write memory (but may have side effects, so
76 it does not necessarily fit ECF_CONST). */
77 #define ECF_NOVOPS (1 << 9)
79 /* The function does not lead to calls within current function unit. */
80 #define ECF_LEAF (1 << 10)
82 /* Nonzero if this call does not affect transactions. */
83 #define ECF_TM_PURE (1 << 11)
85 /* Nonzero if this call is into the transaction runtime library. */
86 #define ECF_TM_BUILTIN (1 << 12)
88 /* Call argument flags. */
89 /* Nonzero if the argument is not dereferenced recursively, thus only
90 directly reachable memory is read or written. */
91 #define EAF_DIRECT (1 << 0)
93 /* Nonzero if memory reached by the argument is not clobbered. */
94 #define EAF_NOCLOBBER (1 << 1)
96 /* Nonzero if the argument does not escape. */
97 #define EAF_NOESCAPE (1 << 2)
99 /* Nonzero if the argument is not used by the function. */
100 #define EAF_UNUSED (1 << 3)
102 /* Call return flags. */
103 /* Mask for the argument number that is returned. Lower two bits of
104 the return flags, encodes argument slots zero to three. */
105 #define ERF_RETURN_ARG_MASK (3)
107 /* Nonzero if the return value is equal to the argument number
108 flags & ERF_RETURN_ARG_MASK. */
109 #define ERF_RETURNS_ARG (1 << 2)
111 /* Nonzero if the return value does not alias with anything. Functions
112 with the malloc attribute have this set on their return value. */
113 #define ERF_NOALIAS (1 << 3)
116 /*---------------------------------------------------------------------------
118 ---------------------------------------------------------------------------*/
119 /* Codes of tree nodes. */
120 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
121 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
124 #include "all-tree.def"
129 #undef END_OF_BASE_TREE_CODES
131 /* Number of language-independent tree codes. */
132 #define NUM_TREE_CODES \
133 ((int) LAST_AND_UNUSED_TREE_CODE)
135 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
136 (tree_contains_struct[(CODE)][(STRUCT)])
139 /* Classify which part of the compiler has defined a given builtin function.
140 Note that we assume below that this is no more than two bits. */
141 enum built_in_class
{
148 /* Last marker used for LTO stremaing of built_in_class. We can not add it
149 to the enum since we need the enumb to fit in 2 bits. */
150 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
152 /* Codes that identify the various built in functions
153 so that expand_call can identify them quickly. */
154 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
155 enum built_in_function
{
156 #include "builtins.def"
161 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM##_CHKP,
162 #include "builtins.def"
166 /* Complex division routines in libgcc. These are done via builtins
167 because emit_library_call_value can't handle complex values. */
168 BUILT_IN_COMPLEX_MUL_MIN
,
169 BUILT_IN_COMPLEX_MUL_MAX
170 = BUILT_IN_COMPLEX_MUL_MIN
171 + MAX_MODE_COMPLEX_FLOAT
172 - MIN_MODE_COMPLEX_FLOAT
,
174 BUILT_IN_COMPLEX_DIV_MIN
,
175 BUILT_IN_COMPLEX_DIV_MAX
176 = BUILT_IN_COMPLEX_DIV_MIN
177 + MAX_MODE_COMPLEX_FLOAT
178 - MIN_MODE_COMPLEX_FLOAT
,
180 /* Upper bound on non-language-specific builtins. */
185 /* Tree code classes. Each tree_code has an associated code class
186 represented by a TREE_CODE_CLASS. */
187 enum tree_code_class
{
188 tcc_exceptional
, /* An exceptional code (fits no category). */
189 tcc_constant
, /* A constant. */
190 /* Order of tcc_type and tcc_declaration is important. */
191 tcc_type
, /* A type object code. */
192 tcc_declaration
, /* A declaration (also serving as variable refs). */
193 tcc_reference
, /* A reference to storage. */
194 tcc_comparison
, /* A comparison expression. */
195 tcc_unary
, /* A unary arithmetic expression. */
196 tcc_binary
, /* A binary arithmetic expression. */
197 tcc_statement
, /* A statement expression, which have side effects
198 but usually no interesting value. */
199 tcc_vl_exp
, /* A function call or other expression with a
200 variable-length operand vector. */
201 tcc_expression
/* Any other expression. */
204 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
205 the tables omp_clause_num_ops and omp_clause_code_name. */
206 enum omp_clause_code
{
207 /* Clause zero is special-cased inside the parser
208 (c_parser_omp_variable_list). */
209 OMP_CLAUSE_ERROR
= 0,
211 /* OpenACC/OpenMP clause: private (variable_list). */
214 /* OpenMP clause: shared (variable_list). */
217 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
218 OMP_CLAUSE_FIRSTPRIVATE
,
220 /* OpenMP clause: lastprivate (variable_list). */
221 OMP_CLAUSE_LASTPRIVATE
,
223 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
224 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
225 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
226 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
228 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
229 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}. */
230 OMP_CLAUSE_REDUCTION
,
232 /* OpenMP clause: copyin (variable_list). */
235 /* OpenMP clause: copyprivate (variable_list). */
236 OMP_CLAUSE_COPYPRIVATE
,
238 /* OpenMP clause: linear (variable-list[:linear-step]). */
241 /* OpenMP clause: aligned (variable-list[:alignment]). */
244 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
247 /* OpenMP clause: uniform (argument-list). */
250 /* OpenMP clause: from (variable-list). */
253 /* OpenMP clause: to (variable-list). */
256 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
257 device, host (self), present, present_or_copy (pcopy), present_or_copyin
258 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
261 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
264 /* Internal structure to hold OpenACC cache directive's variable-list.
265 #pragma acc cache (variable-list). */
268 /* OpenACC clause: device_resident (variable_list). */
269 OMP_CLAUSE_DEVICE_RESIDENT
,
271 /* OpenACC clause: use_device (variable_list). */
272 OMP_CLAUSE_USE_DEVICE
,
274 /* OpenACC clause: gang [(gang-argument-list)].
276 gang-argument-list: [gang-argument-list, ] gang-argument
277 gang-argument: [num:] integer-expression
278 | static: size-expression
279 size-expression: * | integer-expression. */
282 /* OpenACC clause: async [(integer-expression)]. */
285 /* OpenACC clause: wait [(integer-expression-list)]. */
288 /* OpenACC clause: auto. */
291 /* OpenACC clause: seq. */
294 /* Internal clause: temporary for combined loops expansion. */
295 OMP_CLAUSE__LOOPTEMP_
,
297 /* OpenACC/OpenMP clause: if (scalar-expression). */
300 /* OpenMP clause: num_threads (integer-expression). */
301 OMP_CLAUSE_NUM_THREADS
,
303 /* OpenMP clause: schedule. */
306 /* OpenMP clause: nowait. */
309 /* OpenMP clause: ordered. */
312 /* OpenMP clause: default. */
315 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
318 /* OpenMP clause: untied. */
321 /* OpenMP clause: final (scalar-expression). */
324 /* OpenMP clause: mergeable. */
325 OMP_CLAUSE_MERGEABLE
,
327 /* OpenMP clause: device (integer-expression). */
330 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
331 OMP_CLAUSE_DIST_SCHEDULE
,
333 /* OpenMP clause: inbranch. */
336 /* OpenMP clause: notinbranch. */
337 OMP_CLAUSE_NOTINBRANCH
,
339 /* OpenMP clause: num_teams(integer-expression). */
340 OMP_CLAUSE_NUM_TEAMS
,
342 /* OpenMP clause: thread_limit(integer-expression). */
343 OMP_CLAUSE_THREAD_LIMIT
,
345 /* OpenMP clause: proc_bind ({master,close,spread}). */
346 OMP_CLAUSE_PROC_BIND
,
348 /* OpenMP clause: safelen (constant-integer-expression). */
351 /* OpenMP clause: simdlen (constant-integer-expression). */
354 /* OpenMP clause: for. */
357 /* OpenMP clause: parallel. */
360 /* OpenMP clause: sections. */
363 /* OpenMP clause: taskgroup. */
364 OMP_CLAUSE_TASKGROUP
,
366 /* Internally used only clause, holding SIMD uid. */
367 OMP_CLAUSE__SIMDUID_
,
369 /* Internally used only clause, holding _Cilk_for # of iterations
371 OMP_CLAUSE__CILK_FOR_COUNT_
,
373 /* OpenACC clause: independent. */
374 OMP_CLAUSE_INDEPENDENT
,
376 /* OpenACC clause: worker [( [num:] integer-expression)]. */
379 /* OpenACC clause: vector [( [length:] integer-expression)]. */
382 /* OpenACC clause: num_gangs (integer-expression). */
383 OMP_CLAUSE_NUM_GANGS
,
385 /* OpenACC clause: num_workers (integer-expression). */
386 OMP_CLAUSE_NUM_WORKERS
,
388 /* OpenACC clause: vector_length (integer-expression). */
389 OMP_CLAUSE_VECTOR_LENGTH
393 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
394 enum tree_node_structure_enum
{
395 #include "treestruct.def"
400 enum omp_clause_schedule_kind
{
401 OMP_CLAUSE_SCHEDULE_STATIC
,
402 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
403 OMP_CLAUSE_SCHEDULE_GUIDED
,
404 OMP_CLAUSE_SCHEDULE_AUTO
,
405 OMP_CLAUSE_SCHEDULE_RUNTIME
,
406 OMP_CLAUSE_SCHEDULE_CILKFOR
,
407 OMP_CLAUSE_SCHEDULE_LAST
410 enum omp_clause_default_kind
{
411 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
412 OMP_CLAUSE_DEFAULT_SHARED
,
413 OMP_CLAUSE_DEFAULT_NONE
,
414 OMP_CLAUSE_DEFAULT_PRIVATE
,
415 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
416 OMP_CLAUSE_DEFAULT_LAST
419 /* There is a TYPE_QUAL value for each type qualifier. They can be
420 combined by bitwise-or to form the complete set of qualifiers for a
423 TYPE_UNQUALIFIED
= 0x0,
424 TYPE_QUAL_CONST
= 0x1,
425 TYPE_QUAL_VOLATILE
= 0x2,
426 TYPE_QUAL_RESTRICT
= 0x4,
427 TYPE_QUAL_ATOMIC
= 0x8
430 /* Enumerate visibility settings. */
431 #ifndef SYMBOL_VISIBILITY_DEFINED
432 #define SYMBOL_VISIBILITY_DEFINED
433 enum symbol_visibility
{
435 VISIBILITY_PROTECTED
,
439 #endif // SYMBOL_VISIBILITY_DEFINED
441 /* Standard named or nameless data types of the C compiler. */
471 TI_INTEGER_MINUS_ONE
,
488 TI_COMPLEX_INTEGER_TYPE
,
489 TI_COMPLEX_FLOAT_TYPE
,
490 TI_COMPLEX_DOUBLE_TYPE
,
491 TI_COMPLEX_LONG_DOUBLE_TYPE
,
499 TI_LONG_DOUBLE_PTR_TYPE
,
509 TI_VA_LIST_GPR_COUNTER_FIELD
,
510 TI_VA_LIST_FPR_COUNTER_FIELD
,
513 TI_POINTER_SIZED_TYPE
,
515 TI_POINTER_BOUNDS_TYPE
,
520 TI_DFLOAT32_PTR_TYPE
,
521 TI_DFLOAT64_PTR_TYPE
,
522 TI_DFLOAT128_PTR_TYPE
,
535 TI_SAT_ULLFRACT_TYPE
,
551 TI_SAT_ULLACCUM_TYPE
,
597 TI_OPTIMIZATION_DEFAULT
,
598 TI_OPTIMIZATION_CURRENT
,
599 TI_TARGET_OPTION_DEFAULT
,
600 TI_TARGET_OPTION_CURRENT
,
601 TI_CURRENT_TARGET_PRAGMA
,
602 TI_CURRENT_OPTIMIZE_PRAGMA
,
607 /* An enumeration of the standard C integer types. These must be
608 ordered so that shorter types appear before longer ones, and so
609 that signed types appear before unsigned ones, for the correct
610 functioning of interpret_integer() in c-lex.c. */
611 enum integer_type_kind
{
622 itk_unsigned_long_long
,
636 /* A pointer-to-function member type looks like:
643 If __pfn is NULL, it is a NULL pointer-to-member-function.
645 (Because the vtable is always the first thing in the object, we
646 don't need its offset.) If the function is virtual, then PFN is
647 one plus twice the index into the vtable; otherwise, it is just a
648 pointer to the function.
650 Unfortunately, using the lowest bit of PFN doesn't work in
651 architectures that don't impose alignment requirements on function
652 addresses, or that use the lowest bit to tell one ISA from another,
653 for example. For such architectures, we use the lowest bit of
654 DELTA instead of the lowest bit of the PFN, and DELTA will be
656 enum ptrmemfunc_vbit_where_t
{
657 ptrmemfunc_vbit_in_pfn
,
658 ptrmemfunc_vbit_in_delta
661 /* Flags that may be passed in the third argument of decl_attributes, and
662 to handler functions for attributes. */
663 enum attribute_flags
{
664 /* The type passed in is the type of a DECL, and any attributes that
665 should be passed in again to be applied to the DECL rather than the
666 type should be returned. */
667 ATTR_FLAG_DECL_NEXT
= 1,
668 /* The type passed in is a function return type, and any attributes that
669 should be passed in again to be applied to the function type rather
670 than the return type should be returned. */
671 ATTR_FLAG_FUNCTION_NEXT
= 2,
672 /* The type passed in is an array element type, and any attributes that
673 should be passed in again to be applied to the array type rather
674 than the element type should be returned. */
675 ATTR_FLAG_ARRAY_NEXT
= 4,
676 /* The type passed in is a structure, union or enumeration type being
677 created, and should be modified in place. */
678 ATTR_FLAG_TYPE_IN_PLACE
= 8,
679 /* The attributes are being applied by default to a library function whose
680 name indicates known behavior, and should be silently ignored if they
681 are not in fact compatible with the function type. */
682 ATTR_FLAG_BUILT_IN
= 16,
683 /* A given attribute has been parsed as a C++-11 attribute. */
687 /* Types used to represent sizes. */
688 enum size_type_kind
{
689 stk_sizetype
, /* Normal representation of sizes in bytes. */
690 stk_ssizetype
, /* Signed representation of sizes in bytes. */
691 stk_bitsizetype
, /* Normal representation of sizes in bits. */
692 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
696 enum operand_equal_flag
{
699 OEP_CONSTANT_ADDRESS_OF
= 4
702 /* Enum and arrays used for tree allocation stats.
703 Keep in sync with tree.c:tree_node_kind_names. */
704 enum tree_node_kind
{
724 enum annot_expr_kind
{
725 annot_expr_ivdep_kind
,
726 annot_expr_no_vector_kind
,
727 annot_expr_vector_kind
,
731 /* Internal functions. */
733 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
734 #include "internal-fn.def"
735 #undef DEF_INTERNAL_FN
739 /*---------------------------------------------------------------------------
741 ---------------------------------------------------------------------------*/
742 /* When processing aliases at the symbol table level, we need the
743 declaration of target. For this reason we need to queue aliases and
744 process them after all declarations has been produced. */
745 struct GTY(()) alias_pair
{
750 /* An initialization priority. */
751 typedef unsigned short priority_type
;
753 /* The type of a callback function for walking over tree structure. */
754 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
756 /* The type of a callback function that represents a custom walk_tree. */
757 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
758 void *, hash_set
<tree
> *);
761 /*---------------------------------------------------------------------------
763 ---------------------------------------------------------------------------*/
764 /* A tree node can represent a data type, a variable, an expression
765 or a statement. Each node has a TREE_CODE which says what kind of
766 thing it represents. Some common codes are:
767 INTEGER_TYPE -- represents a type of integers.
768 ARRAY_TYPE -- represents a type of pointer.
769 VAR_DECL -- represents a declared variable.
770 INTEGER_CST -- represents a constant integer value.
771 PLUS_EXPR -- represents a sum (an expression).
773 As for the contents of a tree node: there are some fields
774 that all nodes share. Each TREE_CODE has various special-purpose
775 fields as well. The fields of a node are never accessed directly,
776 always through accessor macros. */
778 /* Every kind of tree node starts with this structure,
779 so all nodes have these fields.
781 See the accessor macros, defined below, for documentation of the
782 fields, and the table below which connects the fields and the
785 struct GTY(()) tree_base
{
786 ENUM_BITFIELD(tree_code
) code
: 16;
788 unsigned side_effects_flag
: 1;
789 unsigned constant_flag
: 1;
790 unsigned addressable_flag
: 1;
791 unsigned volatile_flag
: 1;
792 unsigned readonly_flag
: 1;
793 unsigned asm_written_flag
: 1;
794 unsigned nowarning_flag
: 1;
795 unsigned visited
: 1;
797 unsigned used_flag
: 1;
798 unsigned nothrow_flag
: 1;
799 unsigned static_flag
: 1;
800 unsigned public_flag
: 1;
801 unsigned private_flag
: 1;
802 unsigned protected_flag
: 1;
803 unsigned deprecated_flag
: 1;
804 unsigned default_def_flag
: 1;
807 /* The bits in the following structure should only be used with
808 accessor macros that constrain inputs with tree checking. */
810 unsigned lang_flag_0
: 1;
811 unsigned lang_flag_1
: 1;
812 unsigned lang_flag_2
: 1;
813 unsigned lang_flag_3
: 1;
814 unsigned lang_flag_4
: 1;
815 unsigned lang_flag_5
: 1;
816 unsigned lang_flag_6
: 1;
817 unsigned saturating_flag
: 1;
819 unsigned unsigned_flag
: 1;
820 unsigned packed_flag
: 1;
821 unsigned user_align
: 1;
822 unsigned nameless_flag
: 1;
823 unsigned atomic_flag
: 1;
828 /* This field is only used with TREE_TYPE nodes; the only reason it is
829 present in tree_base instead of tree_type is to save space. The size
830 of the field must be large enough to hold addr_space_t values. */
831 unsigned address_space
: 8;
834 /* The following fields are present in tree_base to save space. The
835 nodes using them do not require any of the flags above and so can
836 make better use of the 4-byte sized word. */
838 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
840 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
841 its native precision. */
842 unsigned char unextended
;
844 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
845 wider precisions based on its TYPE_SIGN. */
846 unsigned char extended
;
848 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
849 offset_int precision, with smaller integers being extended
850 according to their TYPE_SIGN. This is equal to one of the two
851 fields above but is cached for speed. */
852 unsigned char offset
;
855 /* VEC length. This field is only used with TREE_VEC. */
858 /* SSA version number. This field is only used with SSA_NAME. */
859 unsigned int version
;
861 /* Internal function code. */
862 enum internal_fn ifn
;
864 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
865 expression trees and specify known data non-dependences. For
866 two memory references in a function they are known to not
867 alias if dependence_info.clique are equal and dependence_info.base
870 unsigned short clique
;
876 /* The following table lists the uses of each of the above flags and
877 for which types of nodes they are defined.
882 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
885 CONSTRUCTOR, IDENTIFIER_NODE
888 CALL_EXPR_TAILCALL in
894 PREDICT_EXPR_OUTCOME in
900 VAR_DECL, FUNCTION_DECL
903 TREE_NO_TRAMPOLINE in
909 TREE_SYMBOL_REFERENCED in
913 TARGET_EXPR, WITH_CLEANUP_EXPR
915 TRY_CATCH_IS_CLEANUP in
921 TYPE_REF_CAN_ALIAS_ALL in
922 POINTER_TYPE, REFERENCE_TYPE
930 TRANSACTION_EXPR_OUTER in
933 SSA_NAME_ANTI_RANGE_P in
939 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
942 VAR_DECL, FUNCTION_DECL
945 CONSTRUCTOR_NO_CLEARING in
951 CALL_EXPR_VA_ARG_PACK in
954 TYPE_CACHED_VALUES_P in
957 SAVE_EXPR_RESOLVED_P in
960 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
961 OMP_CLAUSE_LASTPRIVATE
963 OMP_CLAUSE_PRIVATE_DEBUG in
966 OMP_CLAUSE_LINEAR_NO_COPYIN in
969 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
972 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
975 TRANSACTION_EXPR_RELAXED in
983 CALL_EXPR_RETURN_SLOT_OPT in
989 OMP_PARALLEL_COMBINED in
992 OMP_ATOMIC_SEQ_CST in
995 OMP_CLAUSE_PRIVATE_OUTER_REF in
998 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1001 TYPE_REF_IS_RVALUE in
1013 CALL_FROM_THUNK_P and
1014 CALL_ALLOCA_FOR_VAR_P in
1017 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1022 TREE_SIDE_EFFECTS in
1032 TREE_THIS_VOLATILE in
1055 TYPE_SIZES_GIMPLIFIED in
1069 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1070 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1073 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1093 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1095 SSA_NAME_IN_FREELIST in
1107 IDENTIFIER_TRANSPARENT_ALIAS in
1113 all trees (used liberally by many passes)
1120 VAR_DECL_IS_VIRTUAL_OPERAND in
1134 TYPE_VECTOR_OPAQUE in
1137 SSA_NAME_IS_DEFAULT_DEF in
1140 DECL_NONLOCAL_FRAME in
1144 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1147 struct GTY(()) tree_typed
{
1148 struct tree_base base
;
1152 struct GTY(()) tree_common
{
1153 struct tree_typed typed
;
1157 struct GTY(()) tree_int_cst
{
1158 struct tree_typed typed
;
1159 HOST_WIDE_INT val
[1];
1163 struct GTY(()) tree_real_cst
{
1164 struct tree_typed typed
;
1165 struct real_value
* real_cst_ptr
;
1168 struct GTY(()) tree_fixed_cst
{
1169 struct tree_typed typed
;
1170 struct fixed_value
* fixed_cst_ptr
;
1173 struct GTY(()) tree_string
{
1174 struct tree_typed typed
;
1179 struct GTY(()) tree_complex
{
1180 struct tree_typed typed
;
1185 struct GTY(()) tree_vector
{
1186 struct tree_typed typed
;
1187 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
1190 struct GTY(()) tree_identifier
{
1191 struct tree_common common
;
1192 struct ht_identifier id
;
1195 struct GTY(()) tree_list
{
1196 struct tree_common common
;
1201 struct GTY(()) tree_vec
{
1202 struct tree_common common
;
1203 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1206 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1207 element. INDEX can optionally design the position of VALUE: in arrays,
1208 it is the index where VALUE has to be placed; in structures, it is the
1209 FIELD_DECL of the member. */
1210 struct GTY(()) constructor_elt
{
1215 struct GTY(()) tree_constructor
{
1216 struct tree_typed typed
;
1217 vec
<constructor_elt
, va_gc
> *elts
;
1220 enum omp_clause_depend_kind
1222 OMP_CLAUSE_DEPEND_IN
,
1223 OMP_CLAUSE_DEPEND_OUT
,
1224 OMP_CLAUSE_DEPEND_INOUT
,
1225 OMP_CLAUSE_DEPEND_LAST
1228 enum omp_clause_proc_bind_kind
1230 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1231 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1232 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1233 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1234 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1235 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1236 OMP_CLAUSE_PROC_BIND_LAST
1239 struct GTY(()) tree_exp
{
1240 struct tree_typed typed
;
1242 tree
GTY ((special ("tree_exp"),
1243 desc ("TREE_CODE ((tree) &%0)")))
1247 /* Immediate use linking structure. This structure is used for maintaining
1248 a doubly linked list of uses of an SSA_NAME. */
1249 struct GTY(()) ssa_use_operand_t
{
1250 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1251 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1252 /* Immediate uses for a given SSA name are maintained as a cyclic
1253 list. To recognize the root of this list, the location field
1254 needs to point to the original SSA name. Since statements and
1255 SSA names are of different data types, we need this union. See
1256 the explanation in struct imm_use_iterator. */
1257 union { gimple stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1258 tree
*GTY((skip(""))) use
;
1261 struct GTY(()) tree_ssa_name
{
1262 struct tree_typed typed
;
1264 /* _DECL wrapped by this SSA name. */
1267 /* Statement that defines this SSA name. */
1270 /* Value range information. */
1271 union ssa_name_info_type
{
1272 /* Pointer attributes used for alias analysis. */
1273 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1274 /* Value range attributes used for zero/sign extension elimination. */
1275 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1276 } GTY ((desc ("%1.typed.type ?" \
1277 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1279 /* Immediate uses list for this SSA_NAME. */
1280 struct ssa_use_operand_t imm_uses
;
1283 struct GTY(()) phi_arg_d
{
1284 /* imm_use MUST be the first element in struct because we do some
1285 pointer arithmetic with it. See phi_arg_index_from_use. */
1286 struct ssa_use_operand_t imm_use
;
1291 struct GTY(()) tree_omp_clause
{
1292 struct tree_common common
;
1294 enum omp_clause_code code
;
1295 union omp_clause_subcode
{
1296 enum omp_clause_default_kind default_kind
;
1297 enum omp_clause_schedule_kind schedule_kind
;
1298 enum omp_clause_depend_kind depend_kind
;
1299 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1300 unsigned char map_kind
;
1301 enum omp_clause_proc_bind_kind proc_bind_kind
;
1302 enum tree_code reduction_code
;
1303 } GTY ((skip
)) subcode
;
1305 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1307 gimple_seq gimple_reduction_init
;
1308 gimple_seq gimple_reduction_merge
;
1310 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1314 struct GTY(()) tree_block
{
1315 struct tree_base base
;
1318 unsigned abstract_flag
: 1;
1319 unsigned block_num
: 31;
1322 location_t end_locus
;
1325 vec
<tree
, va_gc
> *nonlocalized_vars
;
1329 tree abstract_origin
;
1330 tree fragment_origin
;
1331 tree fragment_chain
;
1334 struct GTY(()) tree_type_common
{
1335 struct tree_common common
;
1341 unsigned int precision
: 10;
1342 unsigned no_force_blk_flag
: 1;
1343 unsigned needs_constructing_flag
: 1;
1344 unsigned transparent_aggr_flag
: 1;
1345 unsigned restrict_flag
: 1;
1346 unsigned contains_placeholder_bits
: 2;
1348 ENUM_BITFIELD(machine_mode
) mode
: 8;
1350 unsigned string_flag
: 1;
1351 unsigned lang_flag_0
: 1;
1352 unsigned lang_flag_1
: 1;
1353 unsigned lang_flag_2
: 1;
1354 unsigned lang_flag_3
: 1;
1355 unsigned lang_flag_4
: 1;
1356 unsigned lang_flag_5
: 1;
1357 unsigned lang_flag_6
: 1;
1360 alias_set_type alias_set
;
1363 union tree_type_symtab
{
1364 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1365 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1366 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1367 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1375 struct GTY(()) tree_type_with_lang_specific
{
1376 struct tree_type_common common
;
1377 /* Points to a structure whose details depend on the language in use. */
1378 struct lang_type
*lang_specific
;
1381 struct GTY(()) tree_type_non_common
{
1382 struct tree_type_with_lang_specific with_lang_specific
;
1389 struct GTY (()) tree_binfo
{
1390 struct tree_common common
;
1396 vec
<tree
, va_gc
> *base_accesses
;
1402 vec
<tree
, va_gc
> base_binfos
;
1405 struct GTY(()) tree_decl_minimal
{
1406 struct tree_common common
;
1413 struct GTY(()) tree_decl_common
{
1414 struct tree_decl_minimal common
;
1417 ENUM_BITFIELD(machine_mode
) mode
: 8;
1419 unsigned nonlocal_flag
: 1;
1420 unsigned virtual_flag
: 1;
1421 unsigned ignored_flag
: 1;
1422 unsigned abstract_flag
: 1;
1423 unsigned artificial_flag
: 1;
1424 unsigned preserve_flag
: 1;
1425 unsigned debug_expr_is_from
: 1;
1427 unsigned lang_flag_0
: 1;
1428 unsigned lang_flag_1
: 1;
1429 unsigned lang_flag_2
: 1;
1430 unsigned lang_flag_3
: 1;
1431 unsigned lang_flag_4
: 1;
1432 unsigned lang_flag_5
: 1;
1433 unsigned lang_flag_6
: 1;
1434 unsigned lang_flag_7
: 1;
1435 unsigned lang_flag_8
: 1;
1437 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1438 unsigned decl_flag_0
: 1;
1439 /* In FIELD_DECL, this is DECL_BIT_FIELD
1440 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1441 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1442 unsigned decl_flag_1
: 1;
1443 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1444 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1445 DECL_HAS_VALUE_EXPR_P. */
1446 unsigned decl_flag_2
: 1;
1448 unsigned decl_flag_3
: 1;
1449 /* Logically, these two would go in a theoretical base shared by var and
1451 unsigned gimple_reg_flag
: 1;
1452 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1453 unsigned decl_by_reference_flag
: 1;
1454 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1455 unsigned decl_read_flag
: 1;
1456 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1457 unsigned decl_nonshareable_flag
: 1;
1459 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1460 unsigned int off_align
: 8;
1462 /* 24 bits unused. */
1464 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1467 /* UID for points-to sets, stable over copying from inlining. */
1468 unsigned int pt_uid
;
1473 tree abstract_origin
;
1475 /* Points to a structure whose details depend on the language in use. */
1476 struct lang_decl
*lang_specific
;
1479 struct GTY(()) tree_decl_with_rtl
{
1480 struct tree_decl_common common
;
1484 struct GTY(()) tree_field_decl
{
1485 struct tree_decl_common common
;
1488 tree bit_field_type
;
1494 struct GTY(()) tree_label_decl
{
1495 struct tree_decl_with_rtl common
;
1497 int eh_landing_pad_nr
;
1500 struct GTY(()) tree_result_decl
{
1501 struct tree_decl_with_rtl common
;
1504 struct GTY(()) tree_const_decl
{
1505 struct tree_decl_common common
;
1508 struct GTY(()) tree_parm_decl
{
1509 struct tree_decl_with_rtl common
;
1513 struct GTY(()) tree_decl_with_vis
{
1514 struct tree_decl_with_rtl common
;
1515 tree assembler_name
;
1516 struct symtab_node
*symtab_node
;
1518 /* Belong to VAR_DECL exclusively. */
1519 unsigned defer_output
: 1;
1520 unsigned hard_register
: 1;
1521 unsigned common_flag
: 1;
1522 unsigned in_text_section
: 1;
1523 unsigned in_constant_pool
: 1;
1524 unsigned dllimport_flag
: 1;
1525 /* Don't belong to VAR_DECL exclusively. */
1526 unsigned weak_flag
: 1;
1528 unsigned seen_in_bind_expr
: 1;
1529 unsigned comdat_flag
: 1;
1530 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1531 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1532 unsigned visibility_specified
: 1;
1534 /* Belong to FUNCTION_DECL exclusively. */
1535 unsigned init_priority_p
: 1;
1536 /* Used by C++ only. Might become a generic decl flag. */
1537 unsigned shadowed_for_var_p
: 1;
1538 /* Belong to FUNCTION_DECL exclusively. */
1539 unsigned cxx_constructor
: 1;
1540 /* Belong to FUNCTION_DECL exclusively. */
1541 unsigned cxx_destructor
: 1;
1542 /* Belong to FUNCTION_DECL exclusively. */
1544 /* Belong to FUNCTION_DECL exclusively. */
1545 unsigned regdecl_flag
: 1;
1546 /* 14 unused bits. */
1549 struct GTY(()) tree_var_decl
{
1550 struct tree_decl_with_vis common
;
1553 struct GTY(()) tree_decl_non_common
{
1554 struct tree_decl_with_vis common
;
1555 /* Almost all FE's use this. */
1559 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1560 arguments/result/saved_tree fields by front ends. It was either inherit
1561 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1562 which seemed a bit strange. */
1564 struct GTY(()) tree_function_decl
{
1565 struct tree_decl_non_common common
;
1569 /* Arguments of the function. */
1571 /* The personality function. Used for stack unwinding. */
1574 /* Function specific options that are used by this function. */
1575 tree function_specific_target
; /* target options */
1576 tree function_specific_optimization
; /* optimization options */
1578 /* Generic function body. */
1580 /* Index within a virtual table. */
1583 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1584 DECL_FUNCTION_CODE. Otherwise unused.
1585 ??? The bitfield needs to be able to hold all target function
1587 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1588 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1590 unsigned static_ctor_flag
: 1;
1591 unsigned static_dtor_flag
: 1;
1593 unsigned uninlinable
: 1;
1594 unsigned possibly_inlined
: 1;
1595 unsigned novops_flag
: 1;
1596 unsigned returns_twice_flag
: 1;
1597 unsigned malloc_flag
: 1;
1598 unsigned operator_new_flag
: 1;
1599 unsigned declared_inline_flag
: 1;
1600 unsigned no_inline_warning_flag
: 1;
1602 unsigned no_instrument_function_entry_exit
: 1;
1603 unsigned no_limit_stack
: 1;
1604 unsigned disregard_inline_limits
: 1;
1605 unsigned pure_flag
: 1;
1606 unsigned looping_const_or_pure_flag
: 1;
1607 unsigned has_debug_args_flag
: 1;
1608 unsigned tm_clone_flag
: 1;
1609 unsigned versioned_function
: 1;
1613 struct GTY(()) tree_translation_unit_decl
{
1614 struct tree_decl_common common
;
1615 /* Source language of this translation unit. Used for DWARF output. */
1616 const char * GTY((skip(""))) language
;
1617 /* TODO: Non-optimization used to build this translation unit. */
1618 /* TODO: Root of a partial DWARF tree for global types and decls. */
1621 struct GTY(()) tree_type_decl
{
1622 struct tree_decl_non_common common
;
1626 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1628 struct tree_statement_list_node
*prev
;
1629 struct tree_statement_list_node
*next
;
1633 struct GTY(()) tree_statement_list
1635 struct tree_typed typed
;
1636 struct tree_statement_list_node
*head
;
1637 struct tree_statement_list_node
*tail
;
1641 /* Optimization options used by a function. */
1643 struct GTY(()) tree_optimization_option
{
1644 struct tree_common common
;
1646 /* The optimization options used by the user. */
1647 struct cl_optimization opts
;
1649 /* Target optabs for this set of optimization options. This is of
1650 type `struct target_optabs *'. */
1651 void *GTY ((atomic
)) optabs
;
1653 /* The value of this_target_optabs against which the optabs above were
1655 struct target_optabs
*GTY ((skip
)) base_optabs
;
1658 /* Forward declaration, defined in target-globals.h. */
1660 struct GTY(()) target_globals
;
1662 /* Target options used by a function. */
1664 struct GTY(()) tree_target_option
{
1665 struct tree_common common
;
1667 /* Target globals for the corresponding target option. */
1668 struct target_globals
*globals
;
1670 /* The optimization options used by the user. */
1671 struct cl_target_option opts
;
1674 /* Define the overall contents of a tree node.
1675 It may be any of the structures declared above
1676 for various types of node. */
1677 union GTY ((ptr_alias (union lang_tree_node
),
1678 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1679 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1680 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1681 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1682 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1683 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1684 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1685 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1686 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1687 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1688 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1689 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1690 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1691 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1692 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1694 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1695 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1696 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1697 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1698 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1699 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1700 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1701 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1702 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1703 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1704 translation_unit_decl
;
1705 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1706 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1707 type_with_lang_specific
;
1708 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1710 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1711 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1712 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1713 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1714 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1715 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1716 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1717 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1718 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1719 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1720 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1723 /* Structure describing an attribute and a function to handle it. */
1724 struct attribute_spec
{
1725 /* The name of the attribute (without any leading or trailing __),
1726 or NULL to mark the end of a table of attributes. */
1728 /* The minimum length of the list of arguments of the attribute. */
1730 /* The maximum length of the list of arguments of the attribute
1731 (-1 for no maximum). */
1733 /* Whether this attribute requires a DECL. If it does, it will be passed
1734 from types of DECLs, function return types and array element types to
1735 the DECLs, function types and array types respectively; but when
1736 applied to a type in any other circumstances, it will be ignored with
1737 a warning. (If greater control is desired for a given attribute,
1738 this should be false, and the flags argument to the handler may be
1739 used to gain greater control in that case.) */
1741 /* Whether this attribute requires a type. If it does, it will be passed
1742 from a DECL to the type of that DECL. */
1744 /* Whether this attribute requires a function (or method) type. If it does,
1745 it will be passed from a function pointer type to the target type,
1746 and from a function return type (which is not itself a function
1747 pointer type) to the function type. */
1748 bool function_type_required
;
1749 /* Function to handle this attribute. NODE points to the node to which
1750 the attribute is to be applied. If a DECL, it should be modified in
1751 place; if a TYPE, a copy should be created. NAME is the name of the
1752 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1753 of the arguments (which may be NULL). FLAGS gives further information
1754 about the context of the attribute. Afterwards, the attributes will
1755 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1756 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1757 as well as in any other cases when the attributes should not be added
1758 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1759 applied to another type or DECL later may be returned;
1760 otherwise the return value should be NULL_TREE. This pointer may be
1761 NULL if no special handling is required beyond the checks implied
1762 by the rest of this structure. */
1763 tree (*handler
) (tree
*node
, tree name
, tree args
,
1764 int flags
, bool *no_add_attrs
);
1765 /* Specifies if attribute affects type's identity. */
1766 bool affects_type_identity
;
1769 /* These functions allow a front-end to perform a manual layout of a
1770 RECORD_TYPE. (For instance, if the placement of subsequent fields
1771 depends on the placement of fields so far.) Begin by calling
1772 start_record_layout. Then, call place_field for each of the
1773 fields. Then, call finish_record_layout. See layout_type for the
1774 default way in which these functions are used. */
1775 typedef struct record_layout_info_s
{
1776 /* The RECORD_TYPE that we are laying out. */
1778 /* The offset into the record so far, in bytes, not including bits in
1781 /* The last known alignment of SIZE. */
1782 unsigned int offset_align
;
1783 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1785 /* The alignment of the record so far, in bits. */
1786 unsigned int record_align
;
1787 /* The alignment of the record so far, ignoring #pragma pack and
1788 __attribute__ ((packed)), in bits. */
1789 unsigned int unpacked_align
;
1790 /* The previous field laid out. */
1792 /* The static variables (i.e., class variables, as opposed to
1793 instance variables) encountered in T. */
1794 vec
<tree
, va_gc
> *pending_statics
;
1795 /* Bits remaining in the current alignment group */
1796 int remaining_in_alignment
;
1797 /* True if we've seen a packed field that didn't have normal
1798 alignment anyway. */
1799 int packed_maybe_necessary
;
1800 } *record_layout_info
;
1802 /* Iterator for going through the function arguments. */
1803 struct function_args_iterator
{
1804 tree next
; /* TREE_LIST pointing to the next argument */
1807 /* Structures to map from a tree to another tree. */
1808 struct GTY(()) tree_map_base
{
1812 /* Map from a tree to another tree. */
1814 struct GTY((for_user
)) tree_map
{
1815 struct tree_map_base base
;
1820 /* Map from a decl tree to another tree. */
1821 struct GTY((for_user
)) tree_decl_map
{
1822 struct tree_map_base base
;
1826 /* Map from a tree to an int. */
1827 struct GTY((for_user
)) tree_int_map
{
1828 struct tree_map_base base
;
1832 /* Map from a decl tree to a tree vector. */
1833 struct GTY((for_user
)) tree_vec_map
{
1834 struct tree_map_base base
;
1835 vec
<tree
, va_gc
> *to
;
1838 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1839 have to go towards the end of tree.h so that union tree_node is fully
1840 defined by this point. */
1842 /* Structure containing iterator state. */
1843 struct call_expr_arg_iterator
{
1844 tree t
; /* the call_expr */
1845 int n
; /* argument count */
1846 int i
; /* next argument index */
1849 struct const_call_expr_arg_iterator
{
1850 const_tree t
; /* the call_expr */
1851 int n
; /* argument count */
1852 int i
; /* next argument index */
1855 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1856 function, and flags. */
1857 struct GTY(()) builtin_info_type
{
1859 /* Whether the user can use <xxx> instead of explicitly using calls
1860 to __builtin_<xxx>. */
1861 unsigned implicit_p
: 1;
1862 /* Whether the user has provided a declaration of <xxx>. */
1863 unsigned declared_p
: 1;
1867 /*---------------------------------------------------------------------------
1869 ---------------------------------------------------------------------------*/
1870 /* Matrix describing the structures contained in a given tree code. */
1871 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1873 /* Class of tree given its code. */
1874 extern const enum tree_code_class tree_code_type
[];
1876 /* Each tree code class has an associated string representation.
1877 These must correspond to the tree_code_class entries. */
1878 extern const char *const tree_code_class_strings
[];
1880 /* Number of argument-words in each kind of tree-node. */
1881 extern const unsigned char tree_code_length
[];
1883 /* Vector of all alias pairs for global symbols. */
1884 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1886 /* Names of all the built_in classes. */
1887 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1889 /* Names of all the built_in functions. */
1890 extern const char * built_in_names
[(int) END_BUILTINS
];
1892 /* Number of operands and names for each OMP_CLAUSE node. */
1893 extern unsigned const char omp_clause_num_ops
[];
1894 extern const char * const omp_clause_code_name
[];
1896 /* A vector of all translation-units. */
1897 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1899 /* Vector of standard trees used by the C compiler. */
1900 extern GTY(()) tree global_trees
[TI_MAX
];
1902 /* The standard C integer types. Use integer_type_kind to index into
1904 extern GTY(()) tree integer_types
[itk_none
];
1906 /* Types used to represent sizes. */
1907 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1909 /* Arrays for keeping track of tree node statistics. */
1910 extern int tree_node_counts
[];
1911 extern int tree_node_sizes
[];
1913 /* True if we are in gimple form and the actions of the folders need to
1914 be restricted. False if we are not in gimple form and folding is not
1915 restricted to creating gimple expressions. */
1916 extern bool in_gimple_form
;
1918 /* Functional interface to the builtin functions. */
1919 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
1921 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1922 extern unsigned int maximum_field_alignment
;
1924 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1925 extern GTY(()) tree current_function_decl
;
1927 /* Nonzero means a FUNC_BEGIN label was emitted. */
1928 extern GTY(()) const char * current_function_func_begin_label
;
1930 #endif // GCC_TREE_CORE_H