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,
429 TYPE_QUAL_UPC_SHARED
= 0x10,
430 TYPE_QUAL_UPC_RELAXED
= 0x20,
431 TYPE_QUAL_UPC_STRICT
= 0x40
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
,
521 TI_UPC_CHAR_PTS_TYPE
,
533 TI_POINTER_BOUNDS_TYPE
,
538 TI_DFLOAT32_PTR_TYPE
,
539 TI_DFLOAT64_PTR_TYPE
,
540 TI_DFLOAT128_PTR_TYPE
,
553 TI_SAT_ULLFRACT_TYPE
,
569 TI_SAT_ULLACCUM_TYPE
,
615 TI_OPTIMIZATION_DEFAULT
,
616 TI_OPTIMIZATION_CURRENT
,
617 TI_TARGET_OPTION_DEFAULT
,
618 TI_TARGET_OPTION_CURRENT
,
619 TI_CURRENT_TARGET_PRAGMA
,
620 TI_CURRENT_OPTIMIZE_PRAGMA
,
625 /* An enumeration of the standard C integer types. These must be
626 ordered so that shorter types appear before longer ones, and so
627 that signed types appear before unsigned ones, for the correct
628 functioning of interpret_integer() in c-lex.c. */
629 enum integer_type_kind
{
640 itk_unsigned_long_long
,
654 /* A pointer-to-function member type looks like:
661 If __pfn is NULL, it is a NULL pointer-to-member-function.
663 (Because the vtable is always the first thing in the object, we
664 don't need its offset.) If the function is virtual, then PFN is
665 one plus twice the index into the vtable; otherwise, it is just a
666 pointer to the function.
668 Unfortunately, using the lowest bit of PFN doesn't work in
669 architectures that don't impose alignment requirements on function
670 addresses, or that use the lowest bit to tell one ISA from another,
671 for example. For such architectures, we use the lowest bit of
672 DELTA instead of the lowest bit of the PFN, and DELTA will be
674 enum ptrmemfunc_vbit_where_t
{
675 ptrmemfunc_vbit_in_pfn
,
676 ptrmemfunc_vbit_in_delta
679 /* Flags that may be passed in the third argument of decl_attributes, and
680 to handler functions for attributes. */
681 enum attribute_flags
{
682 /* The type passed in is the type of a DECL, and any attributes that
683 should be passed in again to be applied to the DECL rather than the
684 type should be returned. */
685 ATTR_FLAG_DECL_NEXT
= 1,
686 /* The type passed in is a function return type, and any attributes that
687 should be passed in again to be applied to the function type rather
688 than the return type should be returned. */
689 ATTR_FLAG_FUNCTION_NEXT
= 2,
690 /* The type passed in is an array element type, and any attributes that
691 should be passed in again to be applied to the array type rather
692 than the element type should be returned. */
693 ATTR_FLAG_ARRAY_NEXT
= 4,
694 /* The type passed in is a structure, union or enumeration type being
695 created, and should be modified in place. */
696 ATTR_FLAG_TYPE_IN_PLACE
= 8,
697 /* The attributes are being applied by default to a library function whose
698 name indicates known behavior, and should be silently ignored if they
699 are not in fact compatible with the function type. */
700 ATTR_FLAG_BUILT_IN
= 16,
701 /* A given attribute has been parsed as a C++-11 attribute. */
705 /* Types used to represent sizes. */
706 enum size_type_kind
{
707 stk_sizetype
, /* Normal representation of sizes in bytes. */
708 stk_ssizetype
, /* Signed representation of sizes in bytes. */
709 stk_bitsizetype
, /* Normal representation of sizes in bits. */
710 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
714 enum operand_equal_flag
{
717 OEP_CONSTANT_ADDRESS_OF
= 4
720 /* Enum and arrays used for tree allocation stats.
721 Keep in sync with tree.c:tree_node_kind_names. */
722 enum tree_node_kind
{
742 enum annot_expr_kind
{
743 annot_expr_ivdep_kind
,
744 annot_expr_no_vector_kind
,
745 annot_expr_vector_kind
,
749 /* Internal functions. */
751 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
752 #include "internal-fn.def"
753 #undef DEF_INTERNAL_FN
757 /*---------------------------------------------------------------------------
759 ---------------------------------------------------------------------------*/
760 /* When processing aliases at the symbol table level, we need the
761 declaration of target. For this reason we need to queue aliases and
762 process them after all declarations has been produced. */
763 struct GTY(()) alias_pair
{
768 /* An initialization priority. */
769 typedef unsigned short priority_type
;
771 /* The type of a callback function for walking over tree structure. */
772 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
774 /* The type of a callback function that represents a custom walk_tree. */
775 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
776 void *, hash_set
<tree
> *);
779 /*---------------------------------------------------------------------------
781 ---------------------------------------------------------------------------*/
782 /* A tree node can represent a data type, a variable, an expression
783 or a statement. Each node has a TREE_CODE which says what kind of
784 thing it represents. Some common codes are:
785 INTEGER_TYPE -- represents a type of integers.
786 ARRAY_TYPE -- represents a type of pointer.
787 VAR_DECL -- represents a declared variable.
788 INTEGER_CST -- represents a constant integer value.
789 PLUS_EXPR -- represents a sum (an expression).
791 As for the contents of a tree node: there are some fields
792 that all nodes share. Each TREE_CODE has various special-purpose
793 fields as well. The fields of a node are never accessed directly,
794 always through accessor macros. */
796 /* Every kind of tree node starts with this structure,
797 so all nodes have these fields.
799 See the accessor macros, defined below, for documentation of the
800 fields, and the table below which connects the fields and the
803 struct GTY(()) tree_base
{
804 ENUM_BITFIELD(tree_code
) code
: 16;
806 unsigned side_effects_flag
: 1;
807 unsigned constant_flag
: 1;
808 unsigned addressable_flag
: 1;
809 unsigned volatile_flag
: 1;
810 unsigned readonly_flag
: 1;
811 unsigned asm_written_flag
: 1;
812 unsigned nowarning_flag
: 1;
813 unsigned visited
: 1;
815 unsigned used_flag
: 1;
816 unsigned nothrow_flag
: 1;
817 unsigned static_flag
: 1;
818 unsigned public_flag
: 1;
819 unsigned private_flag
: 1;
820 unsigned protected_flag
: 1;
821 unsigned deprecated_flag
: 1;
822 unsigned default_def_flag
: 1;
825 /* The bits in the following structure should only be used with
826 accessor macros that constrain inputs with tree checking. */
828 unsigned lang_flag_0
: 1;
829 unsigned lang_flag_1
: 1;
830 unsigned lang_flag_2
: 1;
831 unsigned lang_flag_3
: 1;
832 unsigned lang_flag_4
: 1;
833 unsigned lang_flag_5
: 1;
834 unsigned lang_flag_6
: 1;
835 unsigned saturating_flag
: 1;
837 unsigned unsigned_flag
: 1;
838 unsigned packed_flag
: 1;
839 unsigned user_align
: 1;
840 unsigned nameless_flag
: 1;
841 unsigned atomic_flag
: 1;
842 unsigned upc_shared_flag
: 1;
843 unsigned upc_strict_flag
: 1;
844 unsigned upc_relaxed_flag
: 1;
846 unsigned threads_factor_flag
: 1;
847 unsigned upc_block_factor_0
: 1;
848 unsigned upc_block_factor_x
: 1;
851 /* This field is only used with TREE_TYPE nodes; the only reason it is
852 present in tree_base instead of tree_type is to save space. The size
853 of the field must be large enough to hold addr_space_t values. */
854 unsigned address_space
: 8;
857 /* The following fields are present in tree_base to save space. The
858 nodes using them do not require any of the flags above and so can
859 make better use of the 4-byte sized word. */
861 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
863 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
864 its native precision. */
865 unsigned char unextended
;
867 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
868 wider precisions based on its TYPE_SIGN. */
869 unsigned char extended
;
871 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
872 offset_int precision, with smaller integers being extended
873 according to their TYPE_SIGN. This is equal to one of the two
874 fields above but is cached for speed. */
875 unsigned char offset
;
878 /* VEC length. This field is only used with TREE_VEC. */
881 /* SSA version number. This field is only used with SSA_NAME. */
882 unsigned int version
;
884 /* Internal function code. */
885 enum internal_fn ifn
;
887 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
888 expression trees and specify known data non-dependences. For
889 two memory references in a function they are known to not
890 alias if dependence_info.clique are equal and dependence_info.base
893 unsigned short clique
;
899 /* The following table lists the uses of each of the above flags and
900 for which types of nodes they are defined.
905 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
908 CONSTRUCTOR, IDENTIFIER_NODE
911 CALL_EXPR_TAILCALL in
917 PREDICT_EXPR_OUTCOME in
923 VAR_DECL, FUNCTION_DECL
926 TREE_NO_TRAMPOLINE in
932 TREE_SYMBOL_REFERENCED in
936 TARGET_EXPR, WITH_CLEANUP_EXPR
938 TRY_CATCH_IS_CLEANUP in
944 TYPE_REF_CAN_ALIAS_ALL in
945 POINTER_TYPE, REFERENCE_TYPE
953 TRANSACTION_EXPR_OUTER in
956 SSA_NAME_ANTI_RANGE_P in
962 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
965 VAR_DECL, FUNCTION_DECL
968 CONSTRUCTOR_NO_CLEARING in
974 CALL_EXPR_VA_ARG_PACK in
977 TYPE_CACHED_VALUES_P in
980 SAVE_EXPR_RESOLVED_P in
983 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
984 OMP_CLAUSE_LASTPRIVATE
986 OMP_CLAUSE_PRIVATE_DEBUG in
989 OMP_CLAUSE_LINEAR_NO_COPYIN in
992 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
995 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
998 TRANSACTION_EXPR_RELAXED in
1006 CALL_EXPR_RETURN_SLOT_OPT in
1012 OMP_PARALLEL_COMBINED in
1015 OMP_ATOMIC_SEQ_CST in
1018 OMP_CLAUSE_PRIVATE_OUTER_REF in
1021 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1024 TYPE_REF_IS_RVALUE in
1036 CALL_FROM_THUNK_P and
1037 CALL_ALLOCA_FOR_VAR_P in
1040 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1045 TREE_SIDE_EFFECTS in
1055 TREE_THIS_VOLATILE in
1078 TYPE_SIZES_GIMPLIFIED in
1092 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1093 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1096 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1116 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1118 SSA_NAME_IN_FREELIST in
1130 IDENTIFIER_TRANSPARENT_ALIAS in
1136 all trees (used liberally by many passes)
1143 VAR_DECL_IS_VIRTUAL_OPERAND in
1157 TYPE_VECTOR_OPAQUE in
1160 SSA_NAME_IS_DEFAULT_DEF in
1163 DECL_NONLOCAL_FRAME in
1167 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1170 struct GTY(()) tree_typed
{
1171 struct tree_base base
;
1175 struct GTY(()) tree_common
{
1176 struct tree_typed typed
;
1180 struct GTY(()) tree_int_cst
{
1181 struct tree_typed typed
;
1182 HOST_WIDE_INT val
[1];
1186 struct GTY(()) tree_real_cst
{
1187 struct tree_typed typed
;
1188 struct real_value
* real_cst_ptr
;
1191 struct GTY(()) tree_fixed_cst
{
1192 struct tree_typed typed
;
1193 struct fixed_value
* fixed_cst_ptr
;
1196 struct GTY(()) tree_string
{
1197 struct tree_typed typed
;
1202 struct GTY(()) tree_complex
{
1203 struct tree_typed typed
;
1208 struct GTY(()) tree_vector
{
1209 struct tree_typed typed
;
1210 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
1213 struct GTY(()) tree_identifier
{
1214 struct tree_common common
;
1215 struct ht_identifier id
;
1218 struct GTY(()) tree_list
{
1219 struct tree_common common
;
1224 struct GTY(()) tree_vec
{
1225 struct tree_common common
;
1226 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1229 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1230 element. INDEX can optionally design the position of VALUE: in arrays,
1231 it is the index where VALUE has to be placed; in structures, it is the
1232 FIELD_DECL of the member. */
1233 struct GTY(()) constructor_elt
{
1238 struct GTY(()) tree_constructor
{
1239 struct tree_typed typed
;
1240 vec
<constructor_elt
, va_gc
> *elts
;
1243 enum omp_clause_depend_kind
1245 OMP_CLAUSE_DEPEND_IN
,
1246 OMP_CLAUSE_DEPEND_OUT
,
1247 OMP_CLAUSE_DEPEND_INOUT
,
1248 OMP_CLAUSE_DEPEND_LAST
1251 enum omp_clause_proc_bind_kind
1253 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1254 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1255 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1256 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1257 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1258 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1259 OMP_CLAUSE_PROC_BIND_LAST
1262 struct GTY(()) tree_exp
{
1263 struct tree_typed typed
;
1265 tree
GTY ((special ("tree_exp"),
1266 desc ("TREE_CODE ((tree) &%0)")))
1270 /* Immediate use linking structure. This structure is used for maintaining
1271 a doubly linked list of uses of an SSA_NAME. */
1272 struct GTY(()) ssa_use_operand_t
{
1273 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1274 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1275 /* Immediate uses for a given SSA name are maintained as a cyclic
1276 list. To recognize the root of this list, the location field
1277 needs to point to the original SSA name. Since statements and
1278 SSA names are of different data types, we need this union. See
1279 the explanation in struct imm_use_iterator. */
1280 union { gimple stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1281 tree
*GTY((skip(""))) use
;
1284 struct GTY(()) tree_ssa_name
{
1285 struct tree_typed typed
;
1287 /* _DECL wrapped by this SSA name. */
1290 /* Statement that defines this SSA name. */
1293 /* Value range information. */
1294 union ssa_name_info_type
{
1295 /* Pointer attributes used for alias analysis. */
1296 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1297 /* Value range attributes used for zero/sign extension elimination. */
1298 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1299 } GTY ((desc ("%1.typed.type ?" \
1300 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1302 /* Immediate uses list for this SSA_NAME. */
1303 struct ssa_use_operand_t imm_uses
;
1306 struct GTY(()) phi_arg_d
{
1307 /* imm_use MUST be the first element in struct because we do some
1308 pointer arithmetic with it. See phi_arg_index_from_use. */
1309 struct ssa_use_operand_t imm_use
;
1314 struct GTY(()) tree_omp_clause
{
1315 struct tree_common common
;
1317 enum omp_clause_code code
;
1318 union omp_clause_subcode
{
1319 enum omp_clause_default_kind default_kind
;
1320 enum omp_clause_schedule_kind schedule_kind
;
1321 enum omp_clause_depend_kind depend_kind
;
1322 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1323 unsigned char map_kind
;
1324 enum omp_clause_proc_bind_kind proc_bind_kind
;
1325 enum tree_code reduction_code
;
1326 } GTY ((skip
)) subcode
;
1328 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1330 gimple_seq gimple_reduction_init
;
1331 gimple_seq gimple_reduction_merge
;
1333 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1337 struct GTY(()) tree_block
{
1338 struct tree_base base
;
1341 unsigned abstract_flag
: 1;
1342 unsigned block_num
: 31;
1345 location_t end_locus
;
1348 vec
<tree
, va_gc
> *nonlocalized_vars
;
1352 tree abstract_origin
;
1353 tree fragment_origin
;
1354 tree fragment_chain
;
1357 struct GTY((user
)) tree_type_common
{
1358 struct tree_common common
;
1364 unsigned int precision
: 10;
1365 unsigned no_force_blk_flag
: 1;
1366 unsigned needs_constructing_flag
: 1;
1367 unsigned transparent_aggr_flag
: 1;
1368 unsigned reupc_strict_flag
: 1;
1369 unsigned contains_placeholder_bits
: 2;
1371 ENUM_BITFIELD(machine_mode
) mode
: 8;
1373 unsigned string_flag
: 1;
1374 unsigned lang_flag_0
: 1;
1375 unsigned lang_flag_1
: 1;
1376 unsigned lang_flag_2
: 1;
1377 unsigned lang_flag_3
: 1;
1378 unsigned lang_flag_4
: 1;
1379 unsigned lang_flag_5
: 1;
1380 unsigned lang_flag_6
: 1;
1383 alias_set_type alias_set
;
1386 union tree_type_symtab
{
1388 const char *pointer
;
1389 struct die_struct
*die
;
1398 /* Garbage collection and PCH support for tree_type_common. */
1399 extern void gt_ggc_mx (tree_type_common
*t
);
1400 extern void gt_pch_nx (tree_type_common
*t
);
1401 extern void gt_pch_nx (tree_type_common
*t
, gt_pointer_operator
, void *);
1403 struct GTY(()) tree_type_with_lang_specific
{
1404 struct tree_type_common common
;
1405 /* Points to a structure whose details depend on the language in use. */
1406 struct lang_type
*lang_specific
;
1409 struct GTY(()) tree_type_non_common
{
1410 struct tree_type_with_lang_specific with_lang_specific
;
1417 struct GTY (()) tree_binfo
{
1418 struct tree_common common
;
1424 vec
<tree
, va_gc
> *base_accesses
;
1430 vec
<tree
, va_gc
> base_binfos
;
1433 struct GTY(()) tree_decl_minimal
{
1434 struct tree_common common
;
1441 struct GTY(()) tree_decl_common
{
1442 struct tree_decl_minimal common
;
1445 ENUM_BITFIELD(machine_mode
) mode
: 8;
1447 unsigned nonlocal_flag
: 1;
1448 unsigned virtual_flag
: 1;
1449 unsigned ignored_flag
: 1;
1450 unsigned abstract_flag
: 1;
1451 unsigned artificial_flag
: 1;
1452 unsigned preserve_flag
: 1;
1453 unsigned debug_expr_is_from
: 1;
1455 unsigned lang_flag_0
: 1;
1456 unsigned lang_flag_1
: 1;
1457 unsigned lang_flag_2
: 1;
1458 unsigned lang_flag_3
: 1;
1459 unsigned lang_flag_4
: 1;
1460 unsigned lang_flag_5
: 1;
1461 unsigned lang_flag_6
: 1;
1462 unsigned lang_flag_7
: 1;
1463 unsigned lang_flag_8
: 1;
1465 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1466 unsigned decl_flag_0
: 1;
1467 /* In FIELD_DECL, this is DECL_BIT_FIELD
1468 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1469 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1470 unsigned decl_flag_1
: 1;
1471 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1472 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1473 DECL_HAS_VALUE_EXPR_P. */
1474 unsigned decl_flag_2
: 1;
1476 unsigned decl_flag_3
: 1;
1477 /* Logically, these two would go in a theoretical base shared by var and
1479 unsigned gimple_reg_flag
: 1;
1480 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1481 unsigned decl_by_reference_flag
: 1;
1482 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1483 unsigned decl_read_flag
: 1;
1484 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1485 unsigned decl_nonshareable_flag
: 1;
1487 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1488 unsigned int off_align
: 8;
1490 /* 24 bits unused. */
1492 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1495 /* UID for points-to sets, stable over copying from inlining. */
1496 unsigned int pt_uid
;
1501 tree abstract_origin
;
1503 /* Points to a structure whose details depend on the language in use. */
1504 struct lang_decl
*lang_specific
;
1507 struct GTY(()) tree_decl_with_rtl
{
1508 struct tree_decl_common common
;
1512 struct GTY(()) tree_field_decl
{
1513 struct tree_decl_common common
;
1516 tree bit_field_type
;
1522 struct GTY(()) tree_label_decl
{
1523 struct tree_decl_with_rtl common
;
1525 int eh_landing_pad_nr
;
1528 struct GTY(()) tree_result_decl
{
1529 struct tree_decl_with_rtl common
;
1532 struct GTY(()) tree_const_decl
{
1533 struct tree_decl_common common
;
1536 struct GTY(()) tree_parm_decl
{
1537 struct tree_decl_with_rtl common
;
1541 struct GTY(()) tree_decl_with_vis
{
1542 struct tree_decl_with_rtl common
;
1543 tree assembler_name
;
1544 struct symtab_node
*symtab_node
;
1546 /* Belong to VAR_DECL exclusively. */
1547 unsigned defer_output
: 1;
1548 unsigned hard_register
: 1;
1549 unsigned common_flag
: 1;
1550 unsigned in_text_section
: 1;
1551 unsigned in_constant_pool
: 1;
1552 unsigned dllimport_flag
: 1;
1553 /* Don't belong to VAR_DECL exclusively. */
1554 unsigned weak_flag
: 1;
1556 unsigned seen_in_bind_expr
: 1;
1557 unsigned comdat_flag
: 1;
1558 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1559 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1560 unsigned visibility_specified
: 1;
1562 /* Belong to FUNCTION_DECL exclusively. */
1563 unsigned init_priority_p
: 1;
1564 /* Used by C++ only. Might become a generic decl flag. */
1565 unsigned shadowed_for_var_p
: 1;
1566 /* Belong to FUNCTION_DECL exclusively. */
1567 unsigned cxx_constructor
: 1;
1568 /* Belong to FUNCTION_DECL exclusively. */
1569 unsigned cxx_destructor
: 1;
1570 /* Belong to FUNCTION_DECL exclusively. */
1572 /* Belong to FUNCTION_DECL exclusively. */
1573 unsigned regdecl_flag
: 1;
1574 /* 14 unused bits. */
1577 struct GTY(()) tree_var_decl
{
1578 struct tree_decl_with_vis common
;
1581 struct GTY(()) tree_decl_non_common
{
1582 struct tree_decl_with_vis common
;
1583 /* Almost all FE's use this. */
1587 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1588 arguments/result/saved_tree fields by front ends. It was either inherit
1589 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1590 which seemed a bit strange. */
1592 struct GTY(()) tree_function_decl
{
1593 struct tree_decl_non_common common
;
1597 /* Arguments of the function. */
1599 /* The personality function. Used for stack unwinding. */
1602 /* Function specific options that are used by this function. */
1603 tree function_specific_target
; /* target options */
1604 tree function_specific_optimization
; /* optimization options */
1606 /* Generic function body. */
1608 /* Index within a virtual table. */
1611 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1612 DECL_FUNCTION_CODE. Otherwise unused.
1613 ??? The bitfield needs to be able to hold all target function
1615 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1616 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1618 unsigned static_ctor_flag
: 1;
1619 unsigned static_dtor_flag
: 1;
1621 unsigned uninlinable
: 1;
1622 unsigned possibly_inlined
: 1;
1623 unsigned novops_flag
: 1;
1624 unsigned returns_twice_flag
: 1;
1625 unsigned malloc_flag
: 1;
1626 unsigned operator_new_flag
: 1;
1627 unsigned declared_inline_flag
: 1;
1628 unsigned no_inline_warning_flag
: 1;
1630 unsigned no_instrument_function_entry_exit
: 1;
1631 unsigned no_limit_stack
: 1;
1632 unsigned disregard_inline_limits
: 1;
1633 unsigned pure_flag
: 1;
1634 unsigned looping_const_or_pure_flag
: 1;
1635 unsigned has_debug_args_flag
: 1;
1636 unsigned tm_clone_flag
: 1;
1637 unsigned versioned_function
: 1;
1641 struct GTY(()) tree_translation_unit_decl
{
1642 struct tree_decl_common common
;
1643 /* Source language of this translation unit. Used for DWARF output. */
1644 const char * GTY((skip(""))) language
;
1645 /* TODO: Non-optimization used to build this translation unit. */
1646 /* TODO: Root of a partial DWARF tree for global types and decls. */
1649 struct GTY(()) tree_type_decl
{
1650 struct tree_decl_non_common common
;
1654 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1656 struct tree_statement_list_node
*prev
;
1657 struct tree_statement_list_node
*next
;
1661 struct GTY(()) tree_statement_list
1663 struct tree_typed typed
;
1664 struct tree_statement_list_node
*head
;
1665 struct tree_statement_list_node
*tail
;
1669 /* Optimization options used by a function. */
1671 struct GTY(()) tree_optimization_option
{
1672 struct tree_common common
;
1674 /* The optimization options used by the user. */
1675 struct cl_optimization opts
;
1677 /* Target optabs for this set of optimization options. This is of
1678 type `struct target_optabs *'. */
1679 void *GTY ((atomic
)) optabs
;
1681 /* The value of this_target_optabs against which the optabs above were
1683 struct target_optabs
*GTY ((skip
)) base_optabs
;
1686 /* Forward declaration, defined in target-globals.h. */
1688 struct GTY(()) target_globals
;
1690 /* Target options used by a function. */
1692 struct GTY(()) tree_target_option
{
1693 struct tree_common common
;
1695 /* Target globals for the corresponding target option. */
1696 struct target_globals
*globals
;
1698 /* The optimization options used by the user. */
1699 struct cl_target_option opts
;
1702 /* Define the overall contents of a tree node.
1703 It may be any of the structures declared above
1704 for various types of node. */
1705 union GTY ((ptr_alias (union lang_tree_node
),
1706 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1707 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1708 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1709 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1710 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1711 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1712 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1713 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1714 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1715 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1716 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1717 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1718 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1719 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1720 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1722 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1723 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1724 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1725 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1726 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1727 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1728 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1729 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1730 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1731 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1732 translation_unit_decl
;
1733 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1734 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1735 type_with_lang_specific
;
1736 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1738 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1739 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1740 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1741 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1742 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1743 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1744 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1745 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1746 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1747 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1748 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1751 /* Structure describing an attribute and a function to handle it. */
1752 struct attribute_spec
{
1753 /* The name of the attribute (without any leading or trailing __),
1754 or NULL to mark the end of a table of attributes. */
1756 /* The minimum length of the list of arguments of the attribute. */
1758 /* The maximum length of the list of arguments of the attribute
1759 (-1 for no maximum). */
1761 /* Whether this attribute requires a DECL. If it does, it will be passed
1762 from types of DECLs, function return types and array element types to
1763 the DECLs, function types and array types respectively; but when
1764 applied to a type in any other circumstances, it will be ignored with
1765 a warning. (If greater control is desired for a given attribute,
1766 this should be false, and the flags argument to the handler may be
1767 used to gain greater control in that case.) */
1769 /* Whether this attribute requires a type. If it does, it will be passed
1770 from a DECL to the type of that DECL. */
1772 /* Whether this attribute requires a function (or method) type. If it does,
1773 it will be passed from a function pointer type to the target type,
1774 and from a function return type (which is not itself a function
1775 pointer type) to the function type. */
1776 bool function_type_required
;
1777 /* Function to handle this attribute. NODE points to the node to which
1778 the attribute is to be applied. If a DECL, it should be modified in
1779 place; if a TYPE, a copy should be created. NAME is the name of the
1780 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1781 of the arguments (which may be NULL). FLAGS gives further information
1782 about the context of the attribute. Afterwards, the attributes will
1783 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1784 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1785 as well as in any other cases when the attributes should not be added
1786 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1787 applied to another type or DECL later may be returned;
1788 otherwise the return value should be NULL_TREE. This pointer may be
1789 NULL if no special handling is required beyond the checks implied
1790 by the rest of this structure. */
1791 tree (*handler
) (tree
*node
, tree name
, tree args
,
1792 int flags
, bool *no_add_attrs
);
1793 /* Specifies if attribute affects type's identity. */
1794 bool affects_type_identity
;
1797 /* These functions allow a front-end to perform a manual layout of a
1798 RECORD_TYPE. (For instance, if the placement of subsequent fields
1799 depends on the placement of fields so far.) Begin by calling
1800 start_record_layout. Then, call place_field for each of the
1801 fields. Then, call finish_record_layout. See layout_type for the
1802 default way in which these functions are used. */
1803 typedef struct record_layout_info_s
{
1804 /* The RECORD_TYPE that we are laying out. */
1806 /* The offset into the record so far, in bytes, not including bits in
1809 /* The last known alignment of SIZE. */
1810 unsigned int offset_align
;
1811 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1813 /* The alignment of the record so far, in bits. */
1814 unsigned int record_align
;
1815 /* The alignment of the record so far, ignoring #pragma pack and
1816 __attribute__ ((packed)), in bits. */
1817 unsigned int unpacked_align
;
1818 /* The previous field laid out. */
1820 /* The static variables (i.e., class variables, as opposed to
1821 instance variables) encountered in T. */
1822 vec
<tree
, va_gc
> *pending_statics
;
1823 /* Bits remaining in the current alignment group */
1824 int remaining_in_alignment
;
1825 /* True if we've seen a packed field that didn't have normal
1826 alignment anyway. */
1827 int packed_maybe_necessary
;
1828 } *record_layout_info
;
1830 /* Iterator for going through the function arguments. */
1831 struct function_args_iterator
{
1832 tree next
; /* TREE_LIST pointing to the next argument */
1835 /* Structures to map from a tree to another tree. */
1836 struct GTY(()) tree_map_base
{
1840 /* Map from a tree to another tree. */
1842 struct GTY((for_user
)) tree_map
{
1843 struct tree_map_base base
;
1848 /* Map from a decl tree to another tree. */
1849 struct GTY((for_user
)) tree_decl_map
{
1850 struct tree_map_base base
;
1854 /* Map from a tree to an int. */
1855 struct GTY((for_user
)) tree_int_map
{
1856 struct tree_map_base base
;
1860 /* Map from a decl tree to a tree vector. */
1861 struct GTY((for_user
)) tree_vec_map
{
1862 struct tree_map_base base
;
1863 vec
<tree
, va_gc
> *to
;
1866 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1867 have to go towards the end of tree.h so that union tree_node is fully
1868 defined by this point. */
1870 /* Structure containing iterator state. */
1871 struct call_expr_arg_iterator
{
1872 tree t
; /* the call_expr */
1873 int n
; /* argument count */
1874 int i
; /* next argument index */
1877 struct const_call_expr_arg_iterator
{
1878 const_tree t
; /* the call_expr */
1879 int n
; /* argument count */
1880 int i
; /* next argument index */
1883 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1884 function, and flags. */
1885 struct GTY(()) builtin_info_type
{
1887 /* Whether the user can use <xxx> instead of explicitly using calls
1888 to __builtin_<xxx>. */
1889 unsigned implicit_p
: 1;
1890 /* Whether the user has provided a declaration of <xxx>. */
1891 unsigned declared_p
: 1;
1895 /*---------------------------------------------------------------------------
1897 ---------------------------------------------------------------------------*/
1898 /* Matrix describing the structures contained in a given tree code. */
1899 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1901 /* Class of tree given its code. */
1902 extern const enum tree_code_class tree_code_type
[];
1904 /* Each tree code class has an associated string representation.
1905 These must correspond to the tree_code_class entries. */
1906 extern const char *const tree_code_class_strings
[];
1908 /* Number of argument-words in each kind of tree-node. */
1909 extern const unsigned char tree_code_length
[];
1911 /* Vector of all alias pairs for global symbols. */
1912 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1914 /* Names of all the built_in classes. */
1915 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1917 /* Names of all the built_in functions. */
1918 extern const char * built_in_names
[(int) END_BUILTINS
];
1920 /* Number of operands and names for each OMP_CLAUSE node. */
1921 extern unsigned const char omp_clause_num_ops
[];
1922 extern const char * const omp_clause_code_name
[];
1924 /* A vector of all translation-units. */
1925 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1927 /* Vector of standard trees used by the C compiler. */
1928 extern GTY(()) tree global_trees
[TI_MAX
];
1930 /* The standard C integer types. Use integer_type_kind to index into
1932 extern GTY(()) tree integer_types
[itk_none
];
1934 /* Types used to represent sizes. */
1935 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1937 /* Arrays for keeping track of tree node statistics. */
1938 extern int tree_node_counts
[];
1939 extern int tree_node_sizes
[];
1941 /* True if we are in gimple form and the actions of the folders need to
1942 be restricted. False if we are not in gimple form and folding is not
1943 restricted to creating gimple expressions. */
1944 extern bool in_gimple_form
;
1946 /* Functional interface to the builtin functions. */
1947 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
1949 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1950 extern unsigned int maximum_field_alignment
;
1952 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1953 extern GTY(()) tree current_function_decl
;
1955 /* Nonzero means a FUNC_BEGIN label was emitted. */
1956 extern GTY(()) const char * current_function_func_begin_label
;
1958 #endif // GCC_TREE_CORE_H