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)
162 #undef DEF_BUILTIN_CHKP
163 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
164 ENUM##_CHKP = ENUM + BEGIN_CHKP_BUILTINS + 1,
165 #include "builtins.def"
166 #undef DEF_BUILTIN_CHKP
168 END_CHKP_BUILTINS
= BEGIN_CHKP_BUILTINS
* 2 + 1,
170 /* Complex division routines in libgcc. These are done via builtins
171 because emit_library_call_value can't handle complex values. */
172 BUILT_IN_COMPLEX_MUL_MIN
,
173 BUILT_IN_COMPLEX_MUL_MAX
174 = BUILT_IN_COMPLEX_MUL_MIN
175 + MAX_MODE_COMPLEX_FLOAT
176 - MIN_MODE_COMPLEX_FLOAT
,
178 BUILT_IN_COMPLEX_DIV_MIN
,
179 BUILT_IN_COMPLEX_DIV_MAX
180 = BUILT_IN_COMPLEX_DIV_MIN
181 + MAX_MODE_COMPLEX_FLOAT
182 - MIN_MODE_COMPLEX_FLOAT
,
184 /* Upper bound on non-language-specific builtins. */
189 /* Tree code classes. Each tree_code has an associated code class
190 represented by a TREE_CODE_CLASS. */
191 enum tree_code_class
{
192 tcc_exceptional
, /* An exceptional code (fits no category). */
193 tcc_constant
, /* A constant. */
194 /* Order of tcc_type and tcc_declaration is important. */
195 tcc_type
, /* A type object code. */
196 tcc_declaration
, /* A declaration (also serving as variable refs). */
197 tcc_reference
, /* A reference to storage. */
198 tcc_comparison
, /* A comparison expression. */
199 tcc_unary
, /* A unary arithmetic expression. */
200 tcc_binary
, /* A binary arithmetic expression. */
201 tcc_statement
, /* A statement expression, which have side effects
202 but usually no interesting value. */
203 tcc_vl_exp
, /* A function call or other expression with a
204 variable-length operand vector. */
205 tcc_expression
/* Any other expression. */
208 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
209 the tables omp_clause_num_ops and omp_clause_code_name. */
210 enum omp_clause_code
{
211 /* Clause zero is special-cased inside the parser
212 (c_parser_omp_variable_list). */
213 OMP_CLAUSE_ERROR
= 0,
215 /* OpenACC/OpenMP clause: private (variable_list). */
218 /* OpenMP clause: shared (variable_list). */
221 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
222 OMP_CLAUSE_FIRSTPRIVATE
,
224 /* OpenMP clause: lastprivate (variable_list). */
225 OMP_CLAUSE_LASTPRIVATE
,
227 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
228 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
229 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
230 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
232 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
233 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}. */
234 OMP_CLAUSE_REDUCTION
,
236 /* OpenMP clause: copyin (variable_list). */
239 /* OpenMP clause: copyprivate (variable_list). */
240 OMP_CLAUSE_COPYPRIVATE
,
242 /* OpenMP clause: linear (variable-list[:linear-step]). */
245 /* OpenMP clause: aligned (variable-list[:alignment]). */
248 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
251 /* OpenMP clause: uniform (argument-list). */
254 /* OpenMP clause: from (variable-list). */
257 /* OpenMP clause: to (variable-list). */
260 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
261 device, host (self), present, present_or_copy (pcopy), present_or_copyin
262 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
265 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
268 /* Internal structure to hold OpenACC cache directive's variable-list.
269 #pragma acc cache (variable-list). */
272 /* OpenACC clause: device_resident (variable_list). */
273 OMP_CLAUSE_DEVICE_RESIDENT
,
275 /* OpenACC clause: use_device (variable_list). */
276 OMP_CLAUSE_USE_DEVICE
,
278 /* OpenACC clause: gang [(gang-argument-list)].
280 gang-argument-list: [gang-argument-list, ] gang-argument
281 gang-argument: [num:] integer-expression
282 | static: size-expression
283 size-expression: * | integer-expression. */
286 /* OpenACC clause: async [(integer-expression)]. */
289 /* OpenACC clause: wait [(integer-expression-list)]. */
292 /* OpenACC clause: auto. */
295 /* OpenACC clause: seq. */
298 /* Internal clause: temporary for combined loops expansion. */
299 OMP_CLAUSE__LOOPTEMP_
,
301 /* OpenACC/OpenMP clause: if (scalar-expression). */
304 /* OpenMP clause: num_threads (integer-expression). */
305 OMP_CLAUSE_NUM_THREADS
,
307 /* OpenMP clause: schedule. */
310 /* OpenMP clause: nowait. */
313 /* OpenMP clause: ordered. */
316 /* OpenMP clause: default. */
319 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
322 /* OpenMP clause: untied. */
325 /* OpenMP clause: final (scalar-expression). */
328 /* OpenMP clause: mergeable. */
329 OMP_CLAUSE_MERGEABLE
,
331 /* OpenMP clause: device (integer-expression). */
334 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
335 OMP_CLAUSE_DIST_SCHEDULE
,
337 /* OpenMP clause: inbranch. */
340 /* OpenMP clause: notinbranch. */
341 OMP_CLAUSE_NOTINBRANCH
,
343 /* OpenMP clause: num_teams(integer-expression). */
344 OMP_CLAUSE_NUM_TEAMS
,
346 /* OpenMP clause: thread_limit(integer-expression). */
347 OMP_CLAUSE_THREAD_LIMIT
,
349 /* OpenMP clause: proc_bind ({master,close,spread}). */
350 OMP_CLAUSE_PROC_BIND
,
352 /* OpenMP clause: safelen (constant-integer-expression). */
355 /* OpenMP clause: simdlen (constant-integer-expression). */
358 /* OpenMP clause: for. */
361 /* OpenMP clause: parallel. */
364 /* OpenMP clause: sections. */
367 /* OpenMP clause: taskgroup. */
368 OMP_CLAUSE_TASKGROUP
,
370 /* Internally used only clause, holding SIMD uid. */
371 OMP_CLAUSE__SIMDUID_
,
373 /* Internally used only clause, holding _Cilk_for # of iterations
375 OMP_CLAUSE__CILK_FOR_COUNT_
,
377 /* OpenACC clause: independent. */
378 OMP_CLAUSE_INDEPENDENT
,
380 /* OpenACC clause: worker [( [num:] integer-expression)]. */
383 /* OpenACC clause: vector [( [length:] integer-expression)]. */
386 /* OpenACC clause: num_gangs (integer-expression). */
387 OMP_CLAUSE_NUM_GANGS
,
389 /* OpenACC clause: num_workers (integer-expression). */
390 OMP_CLAUSE_NUM_WORKERS
,
392 /* OpenACC clause: vector_length (integer-expression). */
393 OMP_CLAUSE_VECTOR_LENGTH
397 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
398 enum tree_node_structure_enum
{
399 #include "treestruct.def"
404 enum omp_clause_schedule_kind
{
405 OMP_CLAUSE_SCHEDULE_STATIC
,
406 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
407 OMP_CLAUSE_SCHEDULE_GUIDED
,
408 OMP_CLAUSE_SCHEDULE_AUTO
,
409 OMP_CLAUSE_SCHEDULE_RUNTIME
,
410 OMP_CLAUSE_SCHEDULE_CILKFOR
,
411 OMP_CLAUSE_SCHEDULE_LAST
414 enum omp_clause_default_kind
{
415 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
416 OMP_CLAUSE_DEFAULT_SHARED
,
417 OMP_CLAUSE_DEFAULT_NONE
,
418 OMP_CLAUSE_DEFAULT_PRIVATE
,
419 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
420 OMP_CLAUSE_DEFAULT_LAST
423 /* There is a TYPE_QUAL value for each type qualifier. They can be
424 combined by bitwise-or to form the complete set of qualifiers for a
427 TYPE_UNQUALIFIED
= 0x0,
428 TYPE_QUAL_CONST
= 0x1,
429 TYPE_QUAL_VOLATILE
= 0x2,
430 TYPE_QUAL_RESTRICT
= 0x4,
431 TYPE_QUAL_ATOMIC
= 0x8
434 /* Enumerate visibility settings. */
435 #ifndef SYMBOL_VISIBILITY_DEFINED
436 #define SYMBOL_VISIBILITY_DEFINED
437 enum symbol_visibility
{
439 VISIBILITY_PROTECTED
,
443 #endif // SYMBOL_VISIBILITY_DEFINED
445 /* Standard named or nameless data types of the C compiler. */
475 TI_INTEGER_MINUS_ONE
,
492 TI_COMPLEX_INTEGER_TYPE
,
493 TI_COMPLEX_FLOAT_TYPE
,
494 TI_COMPLEX_DOUBLE_TYPE
,
495 TI_COMPLEX_LONG_DOUBLE_TYPE
,
503 TI_LONG_DOUBLE_PTR_TYPE
,
513 TI_VA_LIST_GPR_COUNTER_FIELD
,
514 TI_VA_LIST_FPR_COUNTER_FIELD
,
517 TI_POINTER_SIZED_TYPE
,
519 TI_POINTER_BOUNDS_TYPE
,
524 TI_DFLOAT32_PTR_TYPE
,
525 TI_DFLOAT64_PTR_TYPE
,
526 TI_DFLOAT128_PTR_TYPE
,
539 TI_SAT_ULLFRACT_TYPE
,
555 TI_SAT_ULLACCUM_TYPE
,
601 TI_OPTIMIZATION_DEFAULT
,
602 TI_OPTIMIZATION_CURRENT
,
603 TI_TARGET_OPTION_DEFAULT
,
604 TI_TARGET_OPTION_CURRENT
,
605 TI_CURRENT_TARGET_PRAGMA
,
606 TI_CURRENT_OPTIMIZE_PRAGMA
,
611 /* An enumeration of the standard C integer types. These must be
612 ordered so that shorter types appear before longer ones, and so
613 that signed types appear before unsigned ones, for the correct
614 functioning of interpret_integer() in c-lex.c. */
615 enum integer_type_kind
{
626 itk_unsigned_long_long
,
640 /* A pointer-to-function member type looks like:
647 If __pfn is NULL, it is a NULL pointer-to-member-function.
649 (Because the vtable is always the first thing in the object, we
650 don't need its offset.) If the function is virtual, then PFN is
651 one plus twice the index into the vtable; otherwise, it is just a
652 pointer to the function.
654 Unfortunately, using the lowest bit of PFN doesn't work in
655 architectures that don't impose alignment requirements on function
656 addresses, or that use the lowest bit to tell one ISA from another,
657 for example. For such architectures, we use the lowest bit of
658 DELTA instead of the lowest bit of the PFN, and DELTA will be
660 enum ptrmemfunc_vbit_where_t
{
661 ptrmemfunc_vbit_in_pfn
,
662 ptrmemfunc_vbit_in_delta
665 /* Flags that may be passed in the third argument of decl_attributes, and
666 to handler functions for attributes. */
667 enum attribute_flags
{
668 /* The type passed in is the type of a DECL, and any attributes that
669 should be passed in again to be applied to the DECL rather than the
670 type should be returned. */
671 ATTR_FLAG_DECL_NEXT
= 1,
672 /* The type passed in is a function return type, and any attributes that
673 should be passed in again to be applied to the function type rather
674 than the return type should be returned. */
675 ATTR_FLAG_FUNCTION_NEXT
= 2,
676 /* The type passed in is an array element type, and any attributes that
677 should be passed in again to be applied to the array type rather
678 than the element type should be returned. */
679 ATTR_FLAG_ARRAY_NEXT
= 4,
680 /* The type passed in is a structure, union or enumeration type being
681 created, and should be modified in place. */
682 ATTR_FLAG_TYPE_IN_PLACE
= 8,
683 /* The attributes are being applied by default to a library function whose
684 name indicates known behavior, and should be silently ignored if they
685 are not in fact compatible with the function type. */
686 ATTR_FLAG_BUILT_IN
= 16,
687 /* A given attribute has been parsed as a C++-11 attribute. */
691 /* Types used to represent sizes. */
692 enum size_type_kind
{
693 stk_sizetype
, /* Normal representation of sizes in bytes. */
694 stk_ssizetype
, /* Signed representation of sizes in bytes. */
695 stk_bitsizetype
, /* Normal representation of sizes in bits. */
696 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
700 enum operand_equal_flag
{
703 OEP_CONSTANT_ADDRESS_OF
= 4
706 /* Enum and arrays used for tree allocation stats.
707 Keep in sync with tree.c:tree_node_kind_names. */
708 enum tree_node_kind
{
728 enum annot_expr_kind
{
729 annot_expr_ivdep_kind
,
730 annot_expr_no_vector_kind
,
731 annot_expr_vector_kind
,
735 /* Internal functions. */
737 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
738 #include "internal-fn.def"
739 #undef DEF_INTERNAL_FN
743 /*---------------------------------------------------------------------------
745 ---------------------------------------------------------------------------*/
746 /* When processing aliases at the symbol table level, we need the
747 declaration of target. For this reason we need to queue aliases and
748 process them after all declarations has been produced. */
749 struct GTY(()) alias_pair
{
754 /* An initialization priority. */
755 typedef unsigned short priority_type
;
757 /* The type of a callback function for walking over tree structure. */
758 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
760 /* The type of a callback function that represents a custom walk_tree. */
761 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
762 void *, hash_set
<tree
> *);
765 /*---------------------------------------------------------------------------
767 ---------------------------------------------------------------------------*/
768 /* A tree node can represent a data type, a variable, an expression
769 or a statement. Each node has a TREE_CODE which says what kind of
770 thing it represents. Some common codes are:
771 INTEGER_TYPE -- represents a type of integers.
772 ARRAY_TYPE -- represents a type of pointer.
773 VAR_DECL -- represents a declared variable.
774 INTEGER_CST -- represents a constant integer value.
775 PLUS_EXPR -- represents a sum (an expression).
777 As for the contents of a tree node: there are some fields
778 that all nodes share. Each TREE_CODE has various special-purpose
779 fields as well. The fields of a node are never accessed directly,
780 always through accessor macros. */
782 /* Every kind of tree node starts with this structure,
783 so all nodes have these fields.
785 See the accessor macros, defined below, for documentation of the
786 fields, and the table below which connects the fields and the
789 struct GTY(()) tree_base
{
790 ENUM_BITFIELD(tree_code
) code
: 16;
792 unsigned side_effects_flag
: 1;
793 unsigned constant_flag
: 1;
794 unsigned addressable_flag
: 1;
795 unsigned volatile_flag
: 1;
796 unsigned readonly_flag
: 1;
797 unsigned asm_written_flag
: 1;
798 unsigned nowarning_flag
: 1;
799 unsigned visited
: 1;
801 unsigned used_flag
: 1;
802 unsigned nothrow_flag
: 1;
803 unsigned static_flag
: 1;
804 unsigned public_flag
: 1;
805 unsigned private_flag
: 1;
806 unsigned protected_flag
: 1;
807 unsigned deprecated_flag
: 1;
808 unsigned default_def_flag
: 1;
811 /* The bits in the following structure should only be used with
812 accessor macros that constrain inputs with tree checking. */
814 unsigned lang_flag_0
: 1;
815 unsigned lang_flag_1
: 1;
816 unsigned lang_flag_2
: 1;
817 unsigned lang_flag_3
: 1;
818 unsigned lang_flag_4
: 1;
819 unsigned lang_flag_5
: 1;
820 unsigned lang_flag_6
: 1;
821 unsigned saturating_flag
: 1;
823 unsigned unsigned_flag
: 1;
824 unsigned packed_flag
: 1;
825 unsigned user_align
: 1;
826 unsigned nameless_flag
: 1;
827 unsigned atomic_flag
: 1;
832 /* This field is only used with TREE_TYPE nodes; the only reason it is
833 present in tree_base instead of tree_type is to save space. The size
834 of the field must be large enough to hold addr_space_t values. */
835 unsigned address_space
: 8;
838 /* The following fields are present in tree_base to save space. The
839 nodes using them do not require any of the flags above and so can
840 make better use of the 4-byte sized word. */
842 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
844 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
845 its native precision. */
846 unsigned char unextended
;
848 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
849 wider precisions based on its TYPE_SIGN. */
850 unsigned char extended
;
852 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
853 offset_int precision, with smaller integers being extended
854 according to their TYPE_SIGN. This is equal to one of the two
855 fields above but is cached for speed. */
856 unsigned char offset
;
859 /* VEC length. This field is only used with TREE_VEC. */
862 /* SSA version number. This field is only used with SSA_NAME. */
863 unsigned int version
;
865 /* Internal function code. */
866 enum internal_fn ifn
;
868 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
869 expression trees and specify known data non-dependences. For
870 two memory references in a function they are known to not
871 alias if dependence_info.clique are equal and dependence_info.base
874 unsigned short clique
;
880 /* The following table lists the uses of each of the above flags and
881 for which types of nodes they are defined.
886 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
889 CONSTRUCTOR, IDENTIFIER_NODE
892 CALL_EXPR_TAILCALL in
898 PREDICT_EXPR_OUTCOME in
904 VAR_DECL, FUNCTION_DECL
907 TREE_NO_TRAMPOLINE in
913 TREE_SYMBOL_REFERENCED in
917 TARGET_EXPR, WITH_CLEANUP_EXPR
919 TRY_CATCH_IS_CLEANUP in
925 TYPE_REF_CAN_ALIAS_ALL in
926 POINTER_TYPE, REFERENCE_TYPE
934 TRANSACTION_EXPR_OUTER in
937 SSA_NAME_ANTI_RANGE_P in
943 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
946 VAR_DECL, FUNCTION_DECL
949 CONSTRUCTOR_NO_CLEARING in
955 CALL_EXPR_VA_ARG_PACK in
958 TYPE_CACHED_VALUES_P in
961 SAVE_EXPR_RESOLVED_P in
964 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
965 OMP_CLAUSE_LASTPRIVATE
967 OMP_CLAUSE_PRIVATE_DEBUG in
970 OMP_CLAUSE_LINEAR_NO_COPYIN in
973 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
976 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
979 TRANSACTION_EXPR_RELAXED in
987 CALL_EXPR_RETURN_SLOT_OPT in
993 OMP_PARALLEL_COMBINED in
996 OMP_ATOMIC_SEQ_CST in
999 OMP_CLAUSE_PRIVATE_OUTER_REF in
1002 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1005 TYPE_REF_IS_RVALUE in
1017 CALL_FROM_THUNK_P and
1018 CALL_ALLOCA_FOR_VAR_P in
1021 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1026 TREE_SIDE_EFFECTS in
1036 TREE_THIS_VOLATILE in
1059 TYPE_SIZES_GIMPLIFIED in
1073 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1074 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1077 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1097 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1099 SSA_NAME_IN_FREELIST in
1111 IDENTIFIER_TRANSPARENT_ALIAS in
1117 all trees (used liberally by many passes)
1124 VAR_DECL_IS_VIRTUAL_OPERAND in
1138 TYPE_VECTOR_OPAQUE in
1141 SSA_NAME_IS_DEFAULT_DEF in
1144 DECL_NONLOCAL_FRAME in
1148 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1151 struct GTY(()) tree_typed
{
1152 struct tree_base base
;
1156 struct GTY(()) tree_common
{
1157 struct tree_typed typed
;
1161 struct GTY(()) tree_int_cst
{
1162 struct tree_typed typed
;
1163 HOST_WIDE_INT val
[1];
1167 struct GTY(()) tree_real_cst
{
1168 struct tree_typed typed
;
1169 struct real_value
* real_cst_ptr
;
1172 struct GTY(()) tree_fixed_cst
{
1173 struct tree_typed typed
;
1174 struct fixed_value
* fixed_cst_ptr
;
1177 struct GTY(()) tree_string
{
1178 struct tree_typed typed
;
1183 struct GTY(()) tree_complex
{
1184 struct tree_typed typed
;
1189 struct GTY(()) tree_vector
{
1190 struct tree_typed typed
;
1191 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
1194 struct GTY(()) tree_identifier
{
1195 struct tree_common common
;
1196 struct ht_identifier id
;
1199 struct GTY(()) tree_list
{
1200 struct tree_common common
;
1205 struct GTY(()) tree_vec
{
1206 struct tree_common common
;
1207 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1210 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1211 element. INDEX can optionally design the position of VALUE: in arrays,
1212 it is the index where VALUE has to be placed; in structures, it is the
1213 FIELD_DECL of the member. */
1214 struct GTY(()) constructor_elt
{
1219 struct GTY(()) tree_constructor
{
1220 struct tree_typed typed
;
1221 vec
<constructor_elt
, va_gc
> *elts
;
1224 enum omp_clause_depend_kind
1226 OMP_CLAUSE_DEPEND_IN
,
1227 OMP_CLAUSE_DEPEND_OUT
,
1228 OMP_CLAUSE_DEPEND_INOUT
,
1229 OMP_CLAUSE_DEPEND_LAST
1232 enum omp_clause_proc_bind_kind
1234 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1235 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1236 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1237 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1238 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1239 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1240 OMP_CLAUSE_PROC_BIND_LAST
1243 struct GTY(()) tree_exp
{
1244 struct tree_typed typed
;
1246 tree
GTY ((special ("tree_exp"),
1247 desc ("TREE_CODE ((tree) &%0)")))
1251 /* Immediate use linking structure. This structure is used for maintaining
1252 a doubly linked list of uses of an SSA_NAME. */
1253 struct GTY(()) ssa_use_operand_t
{
1254 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1255 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1256 /* Immediate uses for a given SSA name are maintained as a cyclic
1257 list. To recognize the root of this list, the location field
1258 needs to point to the original SSA name. Since statements and
1259 SSA names are of different data types, we need this union. See
1260 the explanation in struct imm_use_iterator. */
1261 union { gimple stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1262 tree
*GTY((skip(""))) use
;
1265 struct GTY(()) tree_ssa_name
{
1266 struct tree_typed typed
;
1268 /* _DECL wrapped by this SSA name. */
1271 /* Statement that defines this SSA name. */
1274 /* Value range information. */
1275 union ssa_name_info_type
{
1276 /* Pointer attributes used for alias analysis. */
1277 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1278 /* Value range attributes used for zero/sign extension elimination. */
1279 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1280 } GTY ((desc ("%1.typed.type ?" \
1281 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1283 /* Immediate uses list for this SSA_NAME. */
1284 struct ssa_use_operand_t imm_uses
;
1287 struct GTY(()) phi_arg_d
{
1288 /* imm_use MUST be the first element in struct because we do some
1289 pointer arithmetic with it. See phi_arg_index_from_use. */
1290 struct ssa_use_operand_t imm_use
;
1295 struct GTY(()) tree_omp_clause
{
1296 struct tree_common common
;
1298 enum omp_clause_code code
;
1299 union omp_clause_subcode
{
1300 enum omp_clause_default_kind default_kind
;
1301 enum omp_clause_schedule_kind schedule_kind
;
1302 enum omp_clause_depend_kind depend_kind
;
1303 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1304 unsigned char map_kind
;
1305 enum omp_clause_proc_bind_kind proc_bind_kind
;
1306 enum tree_code reduction_code
;
1307 } GTY ((skip
)) subcode
;
1309 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1311 gimple_seq gimple_reduction_init
;
1312 gimple_seq gimple_reduction_merge
;
1314 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1318 struct GTY(()) tree_block
{
1319 struct tree_base base
;
1322 unsigned abstract_flag
: 1;
1323 unsigned block_num
: 31;
1326 location_t end_locus
;
1329 vec
<tree
, va_gc
> *nonlocalized_vars
;
1333 tree abstract_origin
;
1334 tree fragment_origin
;
1335 tree fragment_chain
;
1338 struct GTY(()) tree_type_common
{
1339 struct tree_common common
;
1345 unsigned int precision
: 10;
1346 unsigned no_force_blk_flag
: 1;
1347 unsigned needs_constructing_flag
: 1;
1348 unsigned transparent_aggr_flag
: 1;
1349 unsigned restrict_flag
: 1;
1350 unsigned contains_placeholder_bits
: 2;
1352 ENUM_BITFIELD(machine_mode
) mode
: 8;
1354 unsigned string_flag
: 1;
1355 unsigned lang_flag_0
: 1;
1356 unsigned lang_flag_1
: 1;
1357 unsigned lang_flag_2
: 1;
1358 unsigned lang_flag_3
: 1;
1359 unsigned lang_flag_4
: 1;
1360 unsigned lang_flag_5
: 1;
1361 unsigned lang_flag_6
: 1;
1364 alias_set_type alias_set
;
1367 union tree_type_symtab
{
1368 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1369 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1370 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1371 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1379 struct GTY(()) tree_type_with_lang_specific
{
1380 struct tree_type_common common
;
1381 /* Points to a structure whose details depend on the language in use. */
1382 struct lang_type
*lang_specific
;
1385 struct GTY(()) tree_type_non_common
{
1386 struct tree_type_with_lang_specific with_lang_specific
;
1393 struct GTY (()) tree_binfo
{
1394 struct tree_common common
;
1400 vec
<tree
, va_gc
> *base_accesses
;
1406 vec
<tree
, va_gc
> base_binfos
;
1409 struct GTY(()) tree_decl_minimal
{
1410 struct tree_common common
;
1417 struct GTY(()) tree_decl_common
{
1418 struct tree_decl_minimal common
;
1421 ENUM_BITFIELD(machine_mode
) mode
: 8;
1423 unsigned nonlocal_flag
: 1;
1424 unsigned virtual_flag
: 1;
1425 unsigned ignored_flag
: 1;
1426 unsigned abstract_flag
: 1;
1427 unsigned artificial_flag
: 1;
1428 unsigned preserve_flag
: 1;
1429 unsigned debug_expr_is_from
: 1;
1431 unsigned lang_flag_0
: 1;
1432 unsigned lang_flag_1
: 1;
1433 unsigned lang_flag_2
: 1;
1434 unsigned lang_flag_3
: 1;
1435 unsigned lang_flag_4
: 1;
1436 unsigned lang_flag_5
: 1;
1437 unsigned lang_flag_6
: 1;
1438 unsigned lang_flag_7
: 1;
1439 unsigned lang_flag_8
: 1;
1441 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1442 unsigned decl_flag_0
: 1;
1443 /* In FIELD_DECL, this is DECL_BIT_FIELD
1444 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1445 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1446 unsigned decl_flag_1
: 1;
1447 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1448 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1449 DECL_HAS_VALUE_EXPR_P. */
1450 unsigned decl_flag_2
: 1;
1452 unsigned decl_flag_3
: 1;
1453 /* Logically, these two would go in a theoretical base shared by var and
1455 unsigned gimple_reg_flag
: 1;
1456 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1457 unsigned decl_by_reference_flag
: 1;
1458 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1459 unsigned decl_read_flag
: 1;
1460 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1461 unsigned decl_nonshareable_flag
: 1;
1463 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1464 unsigned int off_align
: 8;
1466 /* 24 bits unused. */
1468 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1471 /* UID for points-to sets, stable over copying from inlining. */
1472 unsigned int pt_uid
;
1477 tree abstract_origin
;
1479 /* Points to a structure whose details depend on the language in use. */
1480 struct lang_decl
*lang_specific
;
1483 struct GTY(()) tree_decl_with_rtl
{
1484 struct tree_decl_common common
;
1488 struct GTY(()) tree_field_decl
{
1489 struct tree_decl_common common
;
1492 tree bit_field_type
;
1498 struct GTY(()) tree_label_decl
{
1499 struct tree_decl_with_rtl common
;
1501 int eh_landing_pad_nr
;
1504 struct GTY(()) tree_result_decl
{
1505 struct tree_decl_with_rtl common
;
1508 struct GTY(()) tree_const_decl
{
1509 struct tree_decl_common common
;
1512 struct GTY(()) tree_parm_decl
{
1513 struct tree_decl_with_rtl common
;
1517 struct GTY(()) tree_decl_with_vis
{
1518 struct tree_decl_with_rtl common
;
1519 tree assembler_name
;
1520 struct symtab_node
*symtab_node
;
1522 /* Belong to VAR_DECL exclusively. */
1523 unsigned defer_output
: 1;
1524 unsigned hard_register
: 1;
1525 unsigned common_flag
: 1;
1526 unsigned in_text_section
: 1;
1527 unsigned in_constant_pool
: 1;
1528 unsigned dllimport_flag
: 1;
1529 /* Don't belong to VAR_DECL exclusively. */
1530 unsigned weak_flag
: 1;
1532 unsigned seen_in_bind_expr
: 1;
1533 unsigned comdat_flag
: 1;
1534 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1535 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1536 unsigned visibility_specified
: 1;
1538 /* Belong to FUNCTION_DECL exclusively. */
1539 unsigned init_priority_p
: 1;
1540 /* Used by C++ only. Might become a generic decl flag. */
1541 unsigned shadowed_for_var_p
: 1;
1542 /* Belong to FUNCTION_DECL exclusively. */
1543 unsigned cxx_constructor
: 1;
1544 /* Belong to FUNCTION_DECL exclusively. */
1545 unsigned cxx_destructor
: 1;
1546 /* Belong to FUNCTION_DECL exclusively. */
1548 /* Belong to FUNCTION_DECL exclusively. */
1549 unsigned regdecl_flag
: 1;
1550 /* 14 unused bits. */
1553 struct GTY(()) tree_var_decl
{
1554 struct tree_decl_with_vis common
;
1557 struct GTY(()) tree_decl_non_common
{
1558 struct tree_decl_with_vis common
;
1559 /* Almost all FE's use this. */
1563 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1564 arguments/result/saved_tree fields by front ends. It was either inherit
1565 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1566 which seemed a bit strange. */
1568 struct GTY(()) tree_function_decl
{
1569 struct tree_decl_non_common common
;
1573 /* Arguments of the function. */
1575 /* The personality function. Used for stack unwinding. */
1578 /* Function specific options that are used by this function. */
1579 tree function_specific_target
; /* target options */
1580 tree function_specific_optimization
; /* optimization options */
1582 /* Generic function body. */
1584 /* Index within a virtual table. */
1587 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1588 DECL_FUNCTION_CODE. Otherwise unused.
1589 ??? The bitfield needs to be able to hold all target function
1591 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1592 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1594 unsigned static_ctor_flag
: 1;
1595 unsigned static_dtor_flag
: 1;
1597 unsigned uninlinable
: 1;
1598 unsigned possibly_inlined
: 1;
1599 unsigned novops_flag
: 1;
1600 unsigned returns_twice_flag
: 1;
1601 unsigned malloc_flag
: 1;
1602 unsigned operator_new_flag
: 1;
1603 unsigned declared_inline_flag
: 1;
1604 unsigned no_inline_warning_flag
: 1;
1606 unsigned no_instrument_function_entry_exit
: 1;
1607 unsigned no_limit_stack
: 1;
1608 unsigned disregard_inline_limits
: 1;
1609 unsigned pure_flag
: 1;
1610 unsigned looping_const_or_pure_flag
: 1;
1611 unsigned has_debug_args_flag
: 1;
1612 unsigned tm_clone_flag
: 1;
1613 unsigned versioned_function
: 1;
1617 struct GTY(()) tree_translation_unit_decl
{
1618 struct tree_decl_common common
;
1619 /* Source language of this translation unit. Used for DWARF output. */
1620 const char * GTY((skip(""))) language
;
1621 /* TODO: Non-optimization used to build this translation unit. */
1622 /* TODO: Root of a partial DWARF tree for global types and decls. */
1625 struct GTY(()) tree_type_decl
{
1626 struct tree_decl_non_common common
;
1630 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1632 struct tree_statement_list_node
*prev
;
1633 struct tree_statement_list_node
*next
;
1637 struct GTY(()) tree_statement_list
1639 struct tree_typed typed
;
1640 struct tree_statement_list_node
*head
;
1641 struct tree_statement_list_node
*tail
;
1645 /* Optimization options used by a function. */
1647 struct GTY(()) tree_optimization_option
{
1648 struct tree_common common
;
1650 /* The optimization options used by the user. */
1651 struct cl_optimization opts
;
1653 /* Target optabs for this set of optimization options. This is of
1654 type `struct target_optabs *'. */
1655 void *GTY ((atomic
)) optabs
;
1657 /* The value of this_target_optabs against which the optabs above were
1659 struct target_optabs
*GTY ((skip
)) base_optabs
;
1662 /* Forward declaration, defined in target-globals.h. */
1664 struct GTY(()) target_globals
;
1666 /* Target options used by a function. */
1668 struct GTY(()) tree_target_option
{
1669 struct tree_common common
;
1671 /* Target globals for the corresponding target option. */
1672 struct target_globals
*globals
;
1674 /* The optimization options used by the user. */
1675 struct cl_target_option opts
;
1678 /* Define the overall contents of a tree node.
1679 It may be any of the structures declared above
1680 for various types of node. */
1681 union GTY ((ptr_alias (union lang_tree_node
),
1682 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1683 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1684 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1685 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1686 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1687 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1688 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1689 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1690 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1691 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1692 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1693 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1694 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1695 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1696 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1698 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1699 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1700 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1701 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1702 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1703 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1704 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1705 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1706 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1707 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1708 translation_unit_decl
;
1709 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1710 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1711 type_with_lang_specific
;
1712 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1714 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1715 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1716 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1717 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1718 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1719 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1720 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1721 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1722 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1723 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1724 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1727 /* Structure describing an attribute and a function to handle it. */
1728 struct attribute_spec
{
1729 /* The name of the attribute (without any leading or trailing __),
1730 or NULL to mark the end of a table of attributes. */
1732 /* The minimum length of the list of arguments of the attribute. */
1734 /* The maximum length of the list of arguments of the attribute
1735 (-1 for no maximum). */
1737 /* Whether this attribute requires a DECL. If it does, it will be passed
1738 from types of DECLs, function return types and array element types to
1739 the DECLs, function types and array types respectively; but when
1740 applied to a type in any other circumstances, it will be ignored with
1741 a warning. (If greater control is desired for a given attribute,
1742 this should be false, and the flags argument to the handler may be
1743 used to gain greater control in that case.) */
1745 /* Whether this attribute requires a type. If it does, it will be passed
1746 from a DECL to the type of that DECL. */
1748 /* Whether this attribute requires a function (or method) type. If it does,
1749 it will be passed from a function pointer type to the target type,
1750 and from a function return type (which is not itself a function
1751 pointer type) to the function type. */
1752 bool function_type_required
;
1753 /* Function to handle this attribute. NODE points to the node to which
1754 the attribute is to be applied. If a DECL, it should be modified in
1755 place; if a TYPE, a copy should be created. NAME is the name of the
1756 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1757 of the arguments (which may be NULL). FLAGS gives further information
1758 about the context of the attribute. Afterwards, the attributes will
1759 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1760 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1761 as well as in any other cases when the attributes should not be added
1762 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1763 applied to another type or DECL later may be returned;
1764 otherwise the return value should be NULL_TREE. This pointer may be
1765 NULL if no special handling is required beyond the checks implied
1766 by the rest of this structure. */
1767 tree (*handler
) (tree
*node
, tree name
, tree args
,
1768 int flags
, bool *no_add_attrs
);
1769 /* Specifies if attribute affects type's identity. */
1770 bool affects_type_identity
;
1773 /* These functions allow a front-end to perform a manual layout of a
1774 RECORD_TYPE. (For instance, if the placement of subsequent fields
1775 depends on the placement of fields so far.) Begin by calling
1776 start_record_layout. Then, call place_field for each of the
1777 fields. Then, call finish_record_layout. See layout_type for the
1778 default way in which these functions are used. */
1779 typedef struct record_layout_info_s
{
1780 /* The RECORD_TYPE that we are laying out. */
1782 /* The offset into the record so far, in bytes, not including bits in
1785 /* The last known alignment of SIZE. */
1786 unsigned int offset_align
;
1787 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1789 /* The alignment of the record so far, in bits. */
1790 unsigned int record_align
;
1791 /* The alignment of the record so far, ignoring #pragma pack and
1792 __attribute__ ((packed)), in bits. */
1793 unsigned int unpacked_align
;
1794 /* The previous field laid out. */
1796 /* The static variables (i.e., class variables, as opposed to
1797 instance variables) encountered in T. */
1798 vec
<tree
, va_gc
> *pending_statics
;
1799 /* Bits remaining in the current alignment group */
1800 int remaining_in_alignment
;
1801 /* True if we've seen a packed field that didn't have normal
1802 alignment anyway. */
1803 int packed_maybe_necessary
;
1804 } *record_layout_info
;
1806 /* Iterator for going through the function arguments. */
1807 struct function_args_iterator
{
1808 tree next
; /* TREE_LIST pointing to the next argument */
1811 /* Structures to map from a tree to another tree. */
1812 struct GTY(()) tree_map_base
{
1816 /* Map from a tree to another tree. */
1818 struct GTY((for_user
)) tree_map
{
1819 struct tree_map_base base
;
1824 /* Map from a decl tree to another tree. */
1825 struct GTY((for_user
)) tree_decl_map
{
1826 struct tree_map_base base
;
1830 /* Map from a tree to an int. */
1831 struct GTY((for_user
)) tree_int_map
{
1832 struct tree_map_base base
;
1836 /* Map from a decl tree to a tree vector. */
1837 struct GTY((for_user
)) tree_vec_map
{
1838 struct tree_map_base base
;
1839 vec
<tree
, va_gc
> *to
;
1842 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1843 have to go towards the end of tree.h so that union tree_node is fully
1844 defined by this point. */
1846 /* Structure containing iterator state. */
1847 struct call_expr_arg_iterator
{
1848 tree t
; /* the call_expr */
1849 int n
; /* argument count */
1850 int i
; /* next argument index */
1853 struct const_call_expr_arg_iterator
{
1854 const_tree t
; /* the call_expr */
1855 int n
; /* argument count */
1856 int i
; /* next argument index */
1859 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1860 function, and flags. */
1861 struct GTY(()) builtin_info_type
{
1863 /* Whether the user can use <xxx> instead of explicitly using calls
1864 to __builtin_<xxx>. */
1865 unsigned implicit_p
: 1;
1866 /* Whether the user has provided a declaration of <xxx>. */
1867 unsigned declared_p
: 1;
1871 /*---------------------------------------------------------------------------
1873 ---------------------------------------------------------------------------*/
1874 /* Matrix describing the structures contained in a given tree code. */
1875 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1877 /* Class of tree given its code. */
1878 extern const enum tree_code_class tree_code_type
[];
1880 /* Each tree code class has an associated string representation.
1881 These must correspond to the tree_code_class entries. */
1882 extern const char *const tree_code_class_strings
[];
1884 /* Number of argument-words in each kind of tree-node. */
1885 extern const unsigned char tree_code_length
[];
1887 /* Vector of all alias pairs for global symbols. */
1888 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1890 /* Names of all the built_in classes. */
1891 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1893 /* Names of all the built_in functions. */
1894 extern const char * built_in_names
[(int) END_BUILTINS
];
1896 /* Number of operands and names for each OMP_CLAUSE node. */
1897 extern unsigned const char omp_clause_num_ops
[];
1898 extern const char * const omp_clause_code_name
[];
1900 /* A vector of all translation-units. */
1901 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1903 /* Vector of standard trees used by the C compiler. */
1904 extern GTY(()) tree global_trees
[TI_MAX
];
1906 /* The standard C integer types. Use integer_type_kind to index into
1908 extern GTY(()) tree integer_types
[itk_none
];
1910 /* Types used to represent sizes. */
1911 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1913 /* Arrays for keeping track of tree node statistics. */
1914 extern int tree_node_counts
[];
1915 extern int tree_node_sizes
[];
1917 /* True if we are in gimple form and the actions of the folders need to
1918 be restricted. False if we are not in gimple form and folding is not
1919 restricted to creating gimple expressions. */
1920 extern bool in_gimple_form
;
1922 /* Functional interface to the builtin functions. */
1923 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
1925 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1926 extern unsigned int maximum_field_alignment
;
1928 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1929 extern GTY(()) tree current_function_decl
;
1931 /* Nonzero means a FUNC_BEGIN label was emitted. */
1932 extern GTY(()) const char * current_function_func_begin_label
;
1934 #endif // GCC_TREE_CORE_H