1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2014 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: aligned (variable-list[:alignment]). */
249 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
252 /* OpenMP clause: uniform (argument-list). */
255 /* OpenMP clause: from (variable-list). */
258 /* OpenMP clause: to (variable-list). */
261 /* OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
264 /* Internal clause: temporary for combined loops expansion. */
265 OMP_CLAUSE__LOOPTEMP_,
267 /* OpenMP clause: if (scalar-expression). */
270 /* OpenMP clause: num_threads (integer-expression). */
271 OMP_CLAUSE_NUM_THREADS,
273 /* OpenMP clause: schedule. */
276 /* OpenMP clause: nowait. */
279 /* OpenMP clause: ordered. */
282 /* OpenMP clause: default. */
285 /* OpenMP clause: collapse (constant-integer-expression). */
288 /* OpenMP clause: untied. */
291 /* OpenMP clause: final (scalar-expression). */
294 /* OpenMP clause: mergeable. */
295 OMP_CLAUSE_MERGEABLE,
297 /* OpenMP clause: device (integer-expression). */
300 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
301 OMP_CLAUSE_DIST_SCHEDULE,
303 /* OpenMP clause: inbranch. */
306 /* OpenMP clause: notinbranch. */
307 OMP_CLAUSE_NOTINBRANCH,
309 /* OpenMP clause: num_teams(integer-expression). */
310 OMP_CLAUSE_NUM_TEAMS,
312 /* OpenMP clause: thread_limit(integer-expression). */
313 OMP_CLAUSE_THREAD_LIMIT,
315 /* OpenMP clause: proc_bind ({master,close,spread}). */
316 OMP_CLAUSE_PROC_BIND,
318 /* OpenMP clause: safelen (constant-integer-expression). */
321 /* OpenMP clause: simdlen (constant-integer-expression). */
324 /* OpenMP clause: for. */
327 /* OpenMP clause: parallel. */
330 /* OpenMP clause: sections. */
333 /* OpenMP clause: taskgroup. */
334 OMP_CLAUSE_TASKGROUP,
336 /* Internally used only clause, holding SIMD uid. */
341 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
342 enum tree_node_structure_enum {
343 #include "treestruct.def"
348 enum omp_clause_schedule_kind {
349 OMP_CLAUSE_SCHEDULE_STATIC,
350 OMP_CLAUSE_SCHEDULE_DYNAMIC,
351 OMP_CLAUSE_SCHEDULE_GUIDED,
352 OMP_CLAUSE_SCHEDULE_AUTO,
353 OMP_CLAUSE_SCHEDULE_RUNTIME,
354 OMP_CLAUSE_SCHEDULE_LAST
357 enum omp_clause_default_kind {
358 OMP_CLAUSE_DEFAULT_UNSPECIFIED,
359 OMP_CLAUSE_DEFAULT_SHARED,
360 OMP_CLAUSE_DEFAULT_NONE,
361 OMP_CLAUSE_DEFAULT_PRIVATE,
362 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE,
363 OMP_CLAUSE_DEFAULT_LAST
366 /* There is a TYPE_QUAL value for each type qualifier. They can be
367 combined by bitwise-or to form the complete set of qualifiers for a
370 TYPE_UNQUALIFIED = 0x0,
371 TYPE_QUAL_CONST = 0x1,
372 TYPE_QUAL_VOLATILE = 0x2,
373 TYPE_QUAL_RESTRICT = 0x4,
374 TYPE_QUAL_ATOMIC = 0x8
377 /* Enumerate visibility settings. */
378 #ifndef SYMBOL_VISIBILITY_DEFINED
379 #define SYMBOL_VISIBILITY_DEFINED
380 enum symbol_visibility {
382 VISIBILITY_PROTECTED,
386 #endif // SYMBOL_VISIBILITY_DEFINED
388 /* Standard named or nameless data types of the C compiler. */
416 TI_INTEGER_MINUS_ONE,
433 TI_COMPLEX_INTEGER_TYPE,
434 TI_COMPLEX_FLOAT_TYPE,
435 TI_COMPLEX_DOUBLE_TYPE,
436 TI_COMPLEX_LONG_DOUBLE_TYPE,
444 TI_LONG_DOUBLE_PTR_TYPE,
454 TI_VA_LIST_GPR_COUNTER_FIELD,
455 TI_VA_LIST_FPR_COUNTER_FIELD,
458 TI_POINTER_SIZED_TYPE,
463 TI_DFLOAT32_PTR_TYPE,
464 TI_DFLOAT64_PTR_TYPE,
465 TI_DFLOAT128_PTR_TYPE,
478 TI_SAT_ULLFRACT_TYPE,
494 TI_SAT_ULLACCUM_TYPE,
540 TI_OPTIMIZATION_DEFAULT,
541 TI_OPTIMIZATION_CURRENT,
542 TI_TARGET_OPTION_DEFAULT,
543 TI_TARGET_OPTION_CURRENT,
544 TI_CURRENT_TARGET_PRAGMA,
545 TI_CURRENT_OPTIMIZE_PRAGMA,
550 /* An enumeration of the standard C integer types. These must be
551 ordered so that shorter types appear before longer ones, and so
552 that signed types appear before unsigned ones, for the correct
553 functioning of interpret_integer() in c-lex.c. */
554 enum integer_type_kind {
565 itk_unsigned_long_long,
571 /* A pointer-to-function member type looks like:
578 If __pfn is NULL, it is a NULL pointer-to-member-function.
580 (Because the vtable is always the first thing in the object, we
581 don't need its offset.) If the function is virtual, then PFN is
582 one plus twice the index into the vtable; otherwise, it is just a
583 pointer to the function.
585 Unfortunately, using the lowest bit of PFN doesn't work in
586 architectures that don't impose alignment requirements on function
587 addresses, or that use the lowest bit to tell one ISA from another,
588 for example. For such architectures, we use the lowest bit of
589 DELTA instead of the lowest bit of the PFN, and DELTA will be
591 enum ptrmemfunc_vbit_where_t {
592 ptrmemfunc_vbit_in_pfn,
593 ptrmemfunc_vbit_in_delta
596 /* Flags that may be passed in the third argument of decl_attributes, and
597 to handler functions for attributes. */
598 enum attribute_flags {
599 /* The type passed in is the type of a DECL, and any attributes that
600 should be passed in again to be applied to the DECL rather than the
601 type should be returned. */
602 ATTR_FLAG_DECL_NEXT = 1,
603 /* The type passed in is a function return type, and any attributes that
604 should be passed in again to be applied to the function type rather
605 than the return type should be returned. */
606 ATTR_FLAG_FUNCTION_NEXT = 2,
607 /* The type passed in is an array element type, and any attributes that
608 should be passed in again to be applied to the array type rather
609 than the element type should be returned. */
610 ATTR_FLAG_ARRAY_NEXT = 4,
611 /* The type passed in is a structure, union or enumeration type being
612 created, and should be modified in place. */
613 ATTR_FLAG_TYPE_IN_PLACE = 8,
614 /* The attributes are being applied by default to a library function whose
615 name indicates known behavior, and should be silently ignored if they
616 are not in fact compatible with the function type. */
617 ATTR_FLAG_BUILT_IN = 16,
618 /* A given attribute has been parsed as a C++-11 attribute. */
622 /* Types used to represent sizes. */
623 enum size_type_kind {
624 stk_sizetype, /* Normal representation of sizes in bytes. */
625 stk_ssizetype, /* Signed representation of sizes in bytes. */
626 stk_bitsizetype, /* Normal representation of sizes in bits. */
627 stk_sbitsizetype, /* Signed representation of sizes in bits. */
631 enum operand_equal_flag {
634 OEP_CONSTANT_ADDRESS_OF = 4
637 /* Enum and arrays used for tree allocation stats.
638 Keep in sync with tree.c:tree_node_kind_names. */
639 enum tree_node_kind {
659 enum annot_expr_kind {
660 annot_expr_ivdep_kind,
661 annot_expr_no_vector_kind,
662 annot_expr_vector_kind,
667 /*---------------------------------------------------------------------------
669 ---------------------------------------------------------------------------*/
670 /* When processing aliases at the symbol table level, we need the
671 declaration of target. For this reason we need to queue aliases and
672 process them after all declarations has been produced. */
673 struct GTY(()) alias_pair {
678 /* An initialization priority. */
679 typedef unsigned short priority_type;
681 /* The type of a callback function for walking over tree structure. */
682 typedef tree (*walk_tree_fn) (tree *, int *, void *);
684 /* The type of a callback function that represents a custom walk_tree. */
685 typedef tree (*walk_tree_lh) (tree *, int *, tree (*) (tree *, int *, void *),
686 void *, struct pointer_set_t*);
689 /*---------------------------------------------------------------------------
691 ---------------------------------------------------------------------------*/
692 /* A tree node can represent a data type, a variable, an expression
693 or a statement. Each node has a TREE_CODE which says what kind of
694 thing it represents. Some common codes are:
695 INTEGER_TYPE -- represents a type of integers.
696 ARRAY_TYPE -- represents a type of pointer.
697 VAR_DECL -- represents a declared variable.
698 INTEGER_CST -- represents a constant integer value.
699 PLUS_EXPR -- represents a sum (an expression).
701 As for the contents of a tree node: there are some fields
702 that all nodes share. Each TREE_CODE has various special-purpose
703 fields as well. The fields of a node are never accessed directly,
704 always through accessor macros. */
706 /* Every kind of tree node starts with this structure,
707 so all nodes have these fields.
709 See the accessor macros, defined below, for documentation of the
710 fields, and the table below which connects the fields and the
713 struct GTY(()) tree_base {
714 ENUM_BITFIELD(tree_code) code : 16;
716 unsigned side_effects_flag : 1;
717 unsigned constant_flag : 1;
718 unsigned addressable_flag : 1;
719 unsigned volatile_flag : 1;
720 unsigned readonly_flag : 1;
721 unsigned asm_written_flag: 1;
722 unsigned nowarning_flag : 1;
723 unsigned visited : 1;
725 unsigned used_flag : 1;
726 unsigned nothrow_flag : 1;
727 unsigned static_flag : 1;
728 unsigned public_flag : 1;
729 unsigned private_flag : 1;
730 unsigned protected_flag : 1;
731 unsigned deprecated_flag : 1;
732 unsigned default_def_flag : 1;
735 /* The bits in the following structure should only be used with
736 accessor macros that constrain inputs with tree checking. */
738 unsigned lang_flag_0 : 1;
739 unsigned lang_flag_1 : 1;
740 unsigned lang_flag_2 : 1;
741 unsigned lang_flag_3 : 1;
742 unsigned lang_flag_4 : 1;
743 unsigned lang_flag_5 : 1;
744 unsigned lang_flag_6 : 1;
745 unsigned saturating_flag : 1;
747 unsigned unsigned_flag : 1;
748 unsigned packed_flag : 1;
749 unsigned user_align : 1;
750 unsigned nameless_flag : 1;
751 unsigned atomic_flag : 1;
756 /* This field is only used with TREE_TYPE nodes; the only reason it is
757 present in tree_base instead of tree_type is to save space. The size
758 of the field must be large enough to hold addr_space_t values. */
759 unsigned address_space : 8;
761 /* The following fields are present in tree_base to save space. The
762 nodes using them do not require any of the flags above and so can
763 make better use of the 4-byte sized word. */
764 /* VEC length. This field is only used with TREE_VEC. */
766 /* SSA version number. This field is only used with SSA_NAME. */
767 unsigned int version;
771 /* The following table lists the uses of each of the above flags and
772 for which types of nodes they are defined.
777 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
780 CONSTRUCTOR, IDENTIFIER_NODE
783 CALL_EXPR_TAILCALL in
789 PREDICT_EXPR_OUTCOME in
795 VAR_DECL, FUNCTION_DECL
798 TREE_NO_TRAMPOLINE in
804 TREE_SYMBOL_REFERENCED in
808 TARGET_EXPR, WITH_CLEANUP_EXPR
810 TRY_CATCH_IS_CLEANUP in
816 TYPE_REF_CAN_ALIAS_ALL in
817 POINTER_TYPE, REFERENCE_TYPE
825 TRANSACTION_EXPR_OUTER in
828 SSA_NAME_ANTI_RANGE_P in
834 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
837 VAR_DECL, FUNCTION_DECL
840 CONSTRUCTOR_NO_CLEARING in
846 CALL_EXPR_VA_ARG_PACK in
849 TYPE_CACHED_VALUES_P in
852 SAVE_EXPR_RESOLVED_P in
855 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
856 OMP_CLAUSE_LASTPRIVATE
858 OMP_CLAUSE_PRIVATE_DEBUG in
861 OMP_CLAUSE_LINEAR_NO_COPYIN in
864 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
867 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
870 TRANSACTION_EXPR_RELAXED in
878 CALL_EXPR_RETURN_SLOT_OPT in
884 OMP_PARALLEL_COMBINED in
887 OMP_ATOMIC_SEQ_CST in
890 OMP_CLAUSE_PRIVATE_OUTER_REF in
893 OMP_CLAUSE_LINEAR_NO_COPYOUT in
896 TYPE_REF_IS_RVALUE in
908 CALL_FROM_THUNK_P and
909 CALL_ALLOCA_FOR_VAR_P in
912 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
927 TREE_THIS_VOLATILE in
950 TYPE_SIZES_GIMPLIFIED in
964 VAR_DECL, FUNCTION_DECL, TYPE_DECL
965 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
968 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
988 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
990 SSA_NAME_IN_FREELIST in
993 VAR_DECL_NONALIASED in
1002 IDENTIFIER_TRANSPARENT_ALIAS in
1008 all trees (used liberally by many passes)
1015 VAR_DECL_IS_VIRTUAL_OPERAND in
1029 TYPE_VECTOR_OPAQUE in
1032 SSA_NAME_IS_DEFAULT_DEF in
1035 DECL_NONLOCAL_FRAME in
1039 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1042 struct GTY(()) tree_typed {
1043 struct tree_base base;
1047 struct GTY(()) tree_common {
1048 struct tree_typed typed;
1052 struct GTY(()) tree_int_cst {
1053 struct tree_typed typed;
1058 struct GTY(()) tree_real_cst {
1059 struct tree_typed typed;
1060 struct real_value * real_cst_ptr;
1063 struct GTY(()) tree_fixed_cst {
1064 struct tree_typed typed;
1065 struct fixed_value * fixed_cst_ptr;
1068 struct GTY(()) tree_string {
1069 struct tree_typed typed;
1074 struct GTY(()) tree_complex {
1075 struct tree_typed typed;
1080 struct GTY(()) tree_vector {
1081 struct tree_typed typed;
1082 tree GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts[1];
1085 struct GTY(()) tree_identifier {
1086 struct tree_common common;
1087 struct ht_identifier id;
1090 struct GTY(()) tree_list {
1091 struct tree_common common;
1096 struct GTY(()) tree_vec {
1097 struct tree_common common;
1098 tree GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a[1];
1101 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1102 element. INDEX can optionally design the position of VALUE: in arrays,
1103 it is the index where VALUE has to be placed; in structures, it is the
1104 FIELD_DECL of the member. */
1105 struct GTY(()) constructor_elt {
1110 struct GTY(()) tree_constructor {
1111 struct tree_typed typed;
1112 vec<constructor_elt, va_gc> *elts;
1115 enum omp_clause_depend_kind
1117 OMP_CLAUSE_DEPEND_IN,
1118 OMP_CLAUSE_DEPEND_OUT,
1119 OMP_CLAUSE_DEPEND_INOUT,
1120 OMP_CLAUSE_DEPEND_LAST
1123 enum omp_clause_map_kind
1125 OMP_CLAUSE_MAP_ALLOC,
1127 OMP_CLAUSE_MAP_FROM,
1128 OMP_CLAUSE_MAP_TOFROM,
1129 /* The following kind is an internal only map kind, used for pointer based
1130 array sections. OMP_CLAUSE_SIZE for these is not the pointer size,
1131 which is implicitly POINTER_SIZE / BITS_PER_UNIT, but the bias. */
1132 OMP_CLAUSE_MAP_POINTER,
1136 enum omp_clause_proc_bind_kind
1138 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1139 OMP_CLAUSE_PROC_BIND_FALSE = 0,
1140 OMP_CLAUSE_PROC_BIND_TRUE = 1,
1141 OMP_CLAUSE_PROC_BIND_MASTER = 2,
1142 OMP_CLAUSE_PROC_BIND_CLOSE = 3,
1143 OMP_CLAUSE_PROC_BIND_SPREAD = 4,
1144 OMP_CLAUSE_PROC_BIND_LAST
1147 struct GTY(()) tree_exp {
1148 struct tree_typed typed;
1150 tree GTY ((special ("tree_exp"),
1151 desc ("TREE_CODE ((tree) &%0)")))
1155 /* Immediate use linking structure. This structure is used for maintaining
1156 a doubly linked list of uses of an SSA_NAME. */
1157 struct GTY(()) ssa_use_operand_t {
1158 struct ssa_use_operand_t* GTY((skip(""))) prev;
1159 struct ssa_use_operand_t* GTY((skip(""))) next;
1160 /* Immediate uses for a given SSA name are maintained as a cyclic
1161 list. To recognize the root of this list, the location field
1162 needs to point to the original SSA name. Since statements and
1163 SSA names are of different data types, we need this union. See
1164 the explanation in struct imm_use_iterator. */
1165 union { gimple stmt; tree ssa_name; } GTY((skip(""))) loc;
1166 tree *GTY((skip(""))) use;
1169 struct GTY(()) tree_ssa_name {
1170 struct tree_typed typed;
1172 /* _DECL wrapped by this SSA name. */
1175 /* Statement that defines this SSA name. */
1178 /* Value range information. */
1179 union ssa_name_info_type {
1180 /* Pointer attributes used for alias analysis. */
1181 struct GTY ((tag ("0"))) ptr_info_def *ptr_info;
1182 /* Value range attributes used for zero/sign extension elimination. */
1183 struct GTY ((tag ("1"))) range_info_def *range_info;
1184 } GTY ((desc ("%1.typed.type ?" \
1185 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info;
1187 /* Immediate uses list for this SSA_NAME. */
1188 struct ssa_use_operand_t imm_uses;
1191 struct GTY(()) phi_arg_d {
1192 /* imm_use MUST be the first element in struct because we do some
1193 pointer arithmetic with it. See phi_arg_index_from_use. */
1194 struct ssa_use_operand_t imm_use;
1199 struct GTY(()) tree_omp_clause {
1200 struct tree_common common;
1202 enum omp_clause_code code;
1203 union omp_clause_subcode {
1204 enum omp_clause_default_kind default_kind;
1205 enum omp_clause_schedule_kind schedule_kind;
1206 enum omp_clause_depend_kind depend_kind;
1207 enum omp_clause_map_kind map_kind;
1208 enum omp_clause_proc_bind_kind proc_bind_kind;
1209 enum tree_code reduction_code;
1210 } GTY ((skip)) subcode;
1212 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1214 gimple_seq gimple_reduction_init;
1215 gimple_seq gimple_reduction_merge;
1217 tree GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1221 struct GTY(()) tree_block {
1222 struct tree_base base;
1225 unsigned abstract_flag : 1;
1226 unsigned block_num : 31;
1231 vec<tree, va_gc> *nonlocalized_vars;
1235 tree abstract_origin;
1236 tree fragment_origin;
1237 tree fragment_chain;
1240 struct GTY(()) tree_type_common {
1241 struct tree_common common;
1247 unsigned int precision : 10;
1248 unsigned no_force_blk_flag : 1;
1249 unsigned needs_constructing_flag : 1;
1250 unsigned transparent_aggr_flag : 1;
1251 unsigned restrict_flag : 1;
1252 unsigned contains_placeholder_bits : 2;
1254 ENUM_BITFIELD(machine_mode) mode : 8;
1256 unsigned string_flag : 1;
1257 unsigned lang_flag_0 : 1;
1258 unsigned lang_flag_1 : 1;
1259 unsigned lang_flag_2 : 1;
1260 unsigned lang_flag_3 : 1;
1261 unsigned lang_flag_4 : 1;
1262 unsigned lang_flag_5 : 1;
1263 unsigned lang_flag_6 : 1;
1266 alias_set_type alias_set;
1269 union tree_type_symtab {
1270 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address;
1271 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer;
1272 struct die_struct * GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die;
1273 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab;
1281 struct GTY(()) tree_type_with_lang_specific {
1282 struct tree_type_common common;
1283 /* Points to a structure whose details depend on the language in use. */
1284 struct lang_type *lang_specific;
1287 struct GTY(()) tree_type_non_common {
1288 struct tree_type_with_lang_specific with_lang_specific;
1295 struct GTY (()) tree_binfo {
1296 struct tree_common common;
1302 vec<tree, va_gc> *base_accesses;
1308 vec<tree, va_gc> base_binfos;
1311 struct GTY(()) tree_decl_minimal {
1312 struct tree_common common;
1319 struct GTY(()) tree_decl_common {
1320 struct tree_decl_minimal common;
1323 ENUM_BITFIELD(machine_mode) mode : 8;
1325 unsigned nonlocal_flag : 1;
1326 unsigned virtual_flag : 1;
1327 unsigned ignored_flag : 1;
1328 unsigned abstract_flag : 1;
1329 unsigned artificial_flag : 1;
1330 unsigned preserve_flag: 1;
1331 unsigned debug_expr_is_from : 1;
1333 unsigned lang_flag_0 : 1;
1334 unsigned lang_flag_1 : 1;
1335 unsigned lang_flag_2 : 1;
1336 unsigned lang_flag_3 : 1;
1337 unsigned lang_flag_4 : 1;
1338 unsigned lang_flag_5 : 1;
1339 unsigned lang_flag_6 : 1;
1340 unsigned lang_flag_7 : 1;
1341 unsigned lang_flag_8 : 1;
1343 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1344 unsigned decl_flag_0 : 1;
1345 /* In FIELD_DECL, this is DECL_BIT_FIELD
1346 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1347 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1348 unsigned decl_flag_1 : 1;
1349 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1350 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1351 DECL_HAS_VALUE_EXPR_P. */
1352 unsigned decl_flag_2 : 1;
1354 unsigned decl_flag_3 : 1;
1355 /* Logically, these two would go in a theoretical base shared by var and
1357 unsigned gimple_reg_flag : 1;
1358 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1359 unsigned decl_by_reference_flag : 1;
1360 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1361 unsigned decl_read_flag : 1;
1362 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1363 unsigned decl_nonshareable_flag : 1;
1365 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1366 unsigned int off_align : 8;
1368 /* 24 bits unused. */
1370 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1373 /* UID for points-to sets, stable over copying from inlining. */
1374 unsigned int pt_uid;
1379 tree abstract_origin;
1381 /* Points to a structure whose details depend on the language in use. */
1382 struct lang_decl *lang_specific;
1385 struct GTY(()) tree_decl_with_rtl {
1386 struct tree_decl_common common;
1390 struct GTY(()) tree_field_decl {
1391 struct tree_decl_common common;
1394 tree bit_field_type;
1400 struct GTY(()) tree_label_decl {
1401 struct tree_decl_with_rtl common;
1403 int eh_landing_pad_nr;
1406 struct GTY(()) tree_result_decl {
1407 struct tree_decl_with_rtl common;
1410 struct GTY(()) tree_const_decl {
1411 struct tree_decl_common common;
1414 struct GTY(()) tree_parm_decl {
1415 struct tree_decl_with_rtl common;
1419 struct GTY(()) tree_decl_with_vis {
1420 struct tree_decl_with_rtl common;
1421 tree assembler_name;
1425 /* Belong to VAR_DECL exclusively. */
1426 unsigned defer_output : 1;
1427 unsigned hard_register : 1;
1428 unsigned common_flag : 1;
1429 unsigned in_text_section : 1;
1430 unsigned in_constant_pool : 1;
1431 unsigned dllimport_flag : 1;
1432 /* Don't belong to VAR_DECL exclusively. */
1433 unsigned weak_flag : 1;
1434 /* When SECTION_NAME is implied by -ffunction-section. */
1435 unsigned implicit_section_name_p : 1;
1437 unsigned seen_in_bind_expr : 1;
1438 unsigned comdat_flag : 1;
1439 ENUM_BITFIELD(symbol_visibility) visibility : 2;
1440 unsigned visibility_specified : 1;
1441 /* Belongs to VAR_DECL exclusively. */
1442 ENUM_BITFIELD(tls_model) tls_model : 3;
1444 /* Belong to FUNCTION_DECL exclusively. */
1445 unsigned init_priority_p : 1;
1446 /* Used by C++ only. Might become a generic decl flag. */
1447 unsigned shadowed_for_var_p : 1;
1448 /* Belong to FUNCTION_DECL exclusively. */
1449 unsigned cxx_constructor : 1;
1450 /* Belong to FUNCTION_DECL exclusively. */
1451 unsigned cxx_destructor : 1;
1452 /* Belong to FUNCTION_DECL exclusively. */
1454 /* 11 unused bits. */
1457 struct GTY(()) tree_var_decl {
1458 struct tree_decl_with_vis common;
1461 struct GTY(()) tree_decl_non_common {
1462 struct tree_decl_with_vis common;
1463 /* C++ uses this in namespaces. */
1465 /* C++ uses this in templates. */
1467 /* Almost all FE's use this. */
1469 /* C++ uses this in namespaces and function_decls. */
1473 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1474 arguments/result/saved_tree fields by front ends. It was either inherit
1475 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1476 which seemed a bit strange. */
1478 struct GTY(()) tree_function_decl {
1479 struct tree_decl_non_common common;
1483 /* The personality function. Used for stack unwinding. */
1486 /* Function specific options that are used by this function. */
1487 tree function_specific_target; /* target options */
1488 tree function_specific_optimization; /* optimization options */
1490 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1491 DECL_FUNCTION_CODE. Otherwise unused.
1492 ??? The bitfield needs to be able to hold all target function
1494 ENUM_BITFIELD(built_in_function) function_code : 11;
1495 ENUM_BITFIELD(built_in_class) built_in_class : 2;
1497 unsigned static_ctor_flag : 1;
1498 unsigned static_dtor_flag : 1;
1499 unsigned uninlinable : 1;
1501 unsigned possibly_inlined : 1;
1502 unsigned novops_flag : 1;
1503 unsigned returns_twice_flag : 1;
1504 unsigned malloc_flag : 1;
1505 unsigned operator_new_flag : 1;
1506 unsigned declared_inline_flag : 1;
1507 unsigned regdecl_flag : 1;
1508 unsigned no_inline_warning_flag : 1;
1510 unsigned no_instrument_function_entry_exit : 1;
1511 unsigned no_limit_stack : 1;
1512 unsigned disregard_inline_limits : 1;
1513 unsigned pure_flag : 1;
1514 unsigned looping_const_or_pure_flag : 1;
1515 unsigned has_debug_args_flag : 1;
1516 unsigned tm_clone_flag : 1;
1517 unsigned versioned_function : 1;
1521 struct GTY(()) tree_translation_unit_decl {
1522 struct tree_decl_common common;
1523 /* Source language of this translation unit. Used for DWARF output. */
1524 const char * GTY((skip(""))) language;
1525 /* TODO: Non-optimization used to build this translation unit. */
1526 /* TODO: Root of a partial DWARF tree for global types and decls. */
1529 struct GTY(()) tree_type_decl {
1530 struct tree_decl_non_common common;
1534 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1536 struct tree_statement_list_node *prev;
1537 struct tree_statement_list_node *next;
1541 struct GTY(()) tree_statement_list
1543 struct tree_typed typed;
1544 struct tree_statement_list_node *head;
1545 struct tree_statement_list_node *tail;
1549 /* Optimization options used by a function. */
1551 struct GTY(()) tree_optimization_option {
1552 struct tree_common common;
1554 /* The optimization options used by the user. */
1555 struct cl_optimization opts;
1557 /* Target optabs for this set of optimization options. This is of
1558 type `struct target_optabs *'. */
1559 void *GTY ((atomic)) optabs;
1561 /* The value of this_target_optabs against which the optabs above were
1563 struct target_optabs *GTY ((skip)) base_optabs;
1566 /* Forward declaration, defined in target-globals.h. */
1568 struct GTY(()) target_globals;
1570 /* Target options used by a function. */
1572 struct GTY(()) tree_target_option {
1573 struct tree_common common;
1575 /* Target globals for the corresponding target option. */
1576 struct target_globals *globals;
1578 /* The optimization options used by the user. */
1579 struct cl_target_option opts;
1582 /* Define the overall contents of a tree node.
1583 It may be any of the structures declared above
1584 for various types of node. */
1585 union GTY ((ptr_alias (union lang_tree_node),
1586 desc ("tree_node_structure (&%h)"), variable_size)) tree_node {
1587 struct tree_base GTY ((tag ("TS_BASE"))) base;
1588 struct tree_typed GTY ((tag ("TS_TYPED"))) typed;
1589 struct tree_common GTY ((tag ("TS_COMMON"))) common;
1590 struct tree_int_cst GTY ((tag ("TS_INT_CST"))) int_cst;
1591 struct tree_real_cst GTY ((tag ("TS_REAL_CST"))) real_cst;
1592 struct tree_fixed_cst GTY ((tag ("TS_FIXED_CST"))) fixed_cst;
1593 struct tree_vector GTY ((tag ("TS_VECTOR"))) vector;
1594 struct tree_string GTY ((tag ("TS_STRING"))) string;
1595 struct tree_complex GTY ((tag ("TS_COMPLEX"))) complex;
1596 struct tree_identifier GTY ((tag ("TS_IDENTIFIER"))) identifier;
1597 struct tree_decl_minimal GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal;
1598 struct tree_decl_common GTY ((tag ("TS_DECL_COMMON"))) decl_common;
1599 struct tree_decl_with_rtl GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl;
1600 struct tree_decl_non_common GTY ((tag ("TS_DECL_NON_COMMON")))
1602 struct tree_parm_decl GTY ((tag ("TS_PARM_DECL"))) parm_decl;
1603 struct tree_decl_with_vis GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis;
1604 struct tree_var_decl GTY ((tag ("TS_VAR_DECL"))) var_decl;
1605 struct tree_field_decl GTY ((tag ("TS_FIELD_DECL"))) field_decl;
1606 struct tree_label_decl GTY ((tag ("TS_LABEL_DECL"))) label_decl;
1607 struct tree_result_decl GTY ((tag ("TS_RESULT_DECL"))) result_decl;
1608 struct tree_const_decl GTY ((tag ("TS_CONST_DECL"))) const_decl;
1609 struct tree_type_decl GTY ((tag ("TS_TYPE_DECL"))) type_decl;
1610 struct tree_function_decl GTY ((tag ("TS_FUNCTION_DECL"))) function_decl;
1611 struct tree_translation_unit_decl GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1612 translation_unit_decl;
1613 struct tree_type_common GTY ((tag ("TS_TYPE_COMMON"))) type_common;
1614 struct tree_type_with_lang_specific GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1615 type_with_lang_specific;
1616 struct tree_type_non_common GTY ((tag ("TS_TYPE_NON_COMMON")))
1618 struct tree_list GTY ((tag ("TS_LIST"))) list;
1619 struct tree_vec GTY ((tag ("TS_VEC"))) vec;
1620 struct tree_exp GTY ((tag ("TS_EXP"))) exp;
1621 struct tree_ssa_name GTY ((tag ("TS_SSA_NAME"))) ssa_name;
1622 struct tree_block GTY ((tag ("TS_BLOCK"))) block;
1623 struct tree_binfo GTY ((tag ("TS_BINFO"))) binfo;
1624 struct tree_statement_list GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list;
1625 struct tree_constructor GTY ((tag ("TS_CONSTRUCTOR"))) constructor;
1626 struct tree_omp_clause GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause;
1627 struct tree_optimization_option GTY ((tag ("TS_OPTIMIZATION"))) optimization;
1628 struct tree_target_option GTY ((tag ("TS_TARGET_OPTION"))) target_option;
1631 /* Structure describing an attribute and a function to handle it. */
1632 struct attribute_spec {
1633 /* The name of the attribute (without any leading or trailing __),
1634 or NULL to mark the end of a table of attributes. */
1636 /* The minimum length of the list of arguments of the attribute. */
1638 /* The maximum length of the list of arguments of the attribute
1639 (-1 for no maximum). */
1641 /* Whether this attribute requires a DECL. If it does, it will be passed
1642 from types of DECLs, function return types and array element types to
1643 the DECLs, function types and array types respectively; but when
1644 applied to a type in any other circumstances, it will be ignored with
1645 a warning. (If greater control is desired for a given attribute,
1646 this should be false, and the flags argument to the handler may be
1647 used to gain greater control in that case.) */
1649 /* Whether this attribute requires a type. If it does, it will be passed
1650 from a DECL to the type of that DECL. */
1652 /* Whether this attribute requires a function (or method) type. If it does,
1653 it will be passed from a function pointer type to the target type,
1654 and from a function return type (which is not itself a function
1655 pointer type) to the function type. */
1656 bool function_type_required;
1657 /* Function to handle this attribute. NODE points to the node to which
1658 the attribute is to be applied. If a DECL, it should be modified in
1659 place; if a TYPE, a copy should be created. NAME is the name of the
1660 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1661 of the arguments (which may be NULL). FLAGS gives further information
1662 about the context of the attribute. Afterwards, the attributes will
1663 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1664 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1665 as well as in any other cases when the attributes should not be added
1666 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1667 applied to another type or DECL later may be returned;
1668 otherwise the return value should be NULL_TREE. This pointer may be
1669 NULL if no special handling is required beyond the checks implied
1670 by the rest of this structure. */
1671 tree (*handler) (tree *node, tree name, tree args,
1672 int flags, bool *no_add_attrs);
1673 /* Specifies if attribute affects type's identity. */
1674 bool affects_type_identity;
1677 /* These functions allow a front-end to perform a manual layout of a
1678 RECORD_TYPE. (For instance, if the placement of subsequent fields
1679 depends on the placement of fields so far.) Begin by calling
1680 start_record_layout. Then, call place_field for each of the
1681 fields. Then, call finish_record_layout. See layout_type for the
1682 default way in which these functions are used. */
1683 typedef struct record_layout_info_s {
1684 /* The RECORD_TYPE that we are laying out. */
1686 /* The offset into the record so far, in bytes, not including bits in
1689 /* The last known alignment of SIZE. */
1690 unsigned int offset_align;
1691 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1693 /* The alignment of the record so far, in bits. */
1694 unsigned int record_align;
1695 /* The alignment of the record so far, ignoring #pragma pack and
1696 __attribute__ ((packed)), in bits. */
1697 unsigned int unpacked_align;
1698 /* The previous field laid out. */
1700 /* The static variables (i.e., class variables, as opposed to
1701 instance variables) encountered in T. */
1702 vec<tree, va_gc> *pending_statics;
1703 /* Bits remaining in the current alignment group */
1704 int remaining_in_alignment;
1705 /* True if we've seen a packed field that didn't have normal
1706 alignment anyway. */
1707 int packed_maybe_necessary;
1708 } *record_layout_info;
1710 /* Iterator for going through the function arguments. */
1711 struct function_args_iterator {
1712 tree next; /* TREE_LIST pointing to the next argument */
1715 /* Structures to map from a tree to another tree. */
1716 struct GTY(()) tree_map_base {
1720 /* Map from a tree to another tree. */
1722 struct GTY(()) tree_map {
1723 struct tree_map_base base;
1728 /* Map from a decl tree to another tree. */
1729 struct GTY(()) tree_decl_map {
1730 struct tree_map_base base;
1734 /* Map from a tree to an int. */
1735 struct GTY(()) tree_int_map {
1736 struct tree_map_base base;
1740 /* Map from a tree to initialization/finalization priorities. */
1741 struct GTY(()) tree_priority_map {
1742 struct tree_map_base base;
1747 /* Map from a decl tree to a tree vector. */
1748 struct GTY(()) tree_vec_map {
1749 struct tree_map_base base;
1750 vec<tree, va_gc> *to;
1753 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1754 have to go towards the end of tree.h so that union tree_node is fully
1755 defined by this point. */
1757 /* Structure containing iterator state. */
1758 struct call_expr_arg_iterator {
1759 tree t; /* the call_expr */
1760 int n; /* argument count */
1761 int i; /* next argument index */
1764 struct const_call_expr_arg_iterator {
1765 const_tree t; /* the call_expr */
1766 int n; /* argument count */
1767 int i; /* next argument index */
1770 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1771 function, and a flag that says if the function is available implicitly, or
1772 whether the user has to code explicit calls to __builtin_<xxx>. */
1773 struct GTY(()) builtin_info_type {
1774 tree decl[(int)END_BUILTINS];
1775 bool implicit_p[(int)END_BUILTINS];
1779 /*---------------------------------------------------------------------------
1781 ---------------------------------------------------------------------------*/
1782 /* Matrix describing the structures contained in a given tree code. */
1783 extern unsigned char tree_contains_struct[MAX_TREE_CODES][64];
1785 /* Class of tree given its code. */
1786 extern const enum tree_code_class tree_code_type[];
1788 /* Each tree code class has an associated string representation.
1789 These must correspond to the tree_code_class entries. */
1790 extern const char *const tree_code_class_strings[];
1792 /* Number of argument-words in each kind of tree-node. */
1793 extern const unsigned char tree_code_length[];
1795 /* Vector of all alias pairs for global symbols. */
1796 extern GTY(()) vec<alias_pair, va_gc> *alias_pairs;
1798 /* Names of all the built_in classes. */
1799 extern const char *const built_in_class_names[BUILT_IN_LAST];
1801 /* Names of all the built_in functions. */
1802 extern const char * built_in_names[(int) END_BUILTINS];
1804 /* Number of operands and names for each OMP_CLAUSE node. */
1805 extern unsigned const char omp_clause_num_ops[];
1806 extern const char * const omp_clause_code_name[];
1808 /* A vector of all translation-units. */
1809 extern GTY (()) vec<tree, va_gc> *all_translation_units;
1811 /* Vector of standard trees used by the C compiler. */
1812 extern GTY(()) tree global_trees[TI_MAX];
1814 /* The standard C integer types. Use integer_type_kind to index into
1816 extern GTY(()) tree integer_types[itk_none];
1818 /* Types used to represent sizes. */
1819 extern GTY(()) tree sizetype_tab[(int) stk_type_kind_last];
1821 /* Arrays for keeping track of tree node statistics. */
1822 extern int tree_node_counts[];
1823 extern int tree_node_sizes[];
1825 /* True if we are in gimple form and the actions of the folders need to
1826 be restricted. False if we are not in gimple form and folding is not
1827 restricted to creating gimple expressions. */
1828 extern bool in_gimple_form;
1830 /* Functional interface to the builtin functions. */
1831 extern GTY(()) builtin_info_type builtin_info;
1833 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1834 extern unsigned int maximum_field_alignment;
1836 /* Nonzero means lvalues are limited to those valid in pedantic ANSI C.
1837 Zero means allow extended lvalues. */
1838 extern int pedantic_lvalues;
1840 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1841 extern GTY(()) tree current_function_decl;
1843 /* Nonzero means a FUNC_BEGIN label was emitted. */
1844 extern GTY(()) const char * current_function_func_begin_label;
1846 #endif // GCC_TREE_CORE_H