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
25 /* This file contains all the data structures that define the 'tree' type.
26 There are no accessor macros nor functions in this file. Only the
27 basic data structures, extern declarations and type definitions. */
29 /*---------------------------------------------------------------------------
30 Forward type declarations. Mostly to avoid including unnecessary headers
31 ---------------------------------------------------------------------------*/
36 struct range_info_def
;
40 /*---------------------------------------------------------------------------
42 ---------------------------------------------------------------------------*/
43 /* Nonzero if this is a call to a function whose return value depends
44 solely on its arguments, has no side effects, and does not read
45 global memory. This corresponds to TREE_READONLY for function
47 #define ECF_CONST (1 << 0)
49 /* Nonzero if this is a call to "pure" function (like const function,
50 but may read memory. This corresponds to DECL_PURE_P for function
52 #define ECF_PURE (1 << 1)
54 /* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no
55 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P
57 #define ECF_LOOPING_CONST_OR_PURE (1 << 2)
59 /* Nonzero if this call will never return. */
60 #define ECF_NORETURN (1 << 3)
62 /* Nonzero if this is a call to malloc or a related function. */
63 #define ECF_MALLOC (1 << 4)
65 /* Nonzero if it is plausible that this is a call to alloca. */
66 #define ECF_MAY_BE_ALLOCA (1 << 5)
68 /* Nonzero if this is a call to a function that won't throw an exception. */
69 #define ECF_NOTHROW (1 << 6)
71 /* Nonzero if this is a call to setjmp or a related function. */
72 #define ECF_RETURNS_TWICE (1 << 7)
74 /* Nonzero if this call replaces the current stack frame. */
75 #define ECF_SIBCALL (1 << 8)
77 /* Function does not read or write memory (but may have side effects, so
78 it does not necessarily fit ECF_CONST). */
79 #define ECF_NOVOPS (1 << 9)
81 /* The function does not lead to calls within current function unit. */
82 #define ECF_LEAF (1 << 10)
84 /* Nonzero if this call does not affect transactions. */
85 #define ECF_TM_PURE (1 << 11)
87 /* Nonzero if this call is into the transaction runtime library. */
88 #define ECF_TM_BUILTIN (1 << 12)
90 /* Call argument flags. */
91 /* Nonzero if the argument is not dereferenced recursively, thus only
92 directly reachable memory is read or written. */
93 #define EAF_DIRECT (1 << 0)
95 /* Nonzero if memory reached by the argument is not clobbered. */
96 #define EAF_NOCLOBBER (1 << 1)
98 /* Nonzero if the argument does not escape. */
99 #define EAF_NOESCAPE (1 << 2)
101 /* Nonzero if the argument is not used by the function. */
102 #define EAF_UNUSED (1 << 3)
104 /* Call return flags. */
105 /* Mask for the argument number that is returned. Lower two bits of
106 the return flags, encodes argument slots zero to three. */
107 #define ERF_RETURN_ARG_MASK (3)
109 /* Nonzero if the return value is equal to the argument number
110 flags & ERF_RETURN_ARG_MASK. */
111 #define ERF_RETURNS_ARG (1 << 2)
113 /* Nonzero if the return value does not alias with anything. Functions
114 with the malloc attribute have this set on their return value. */
115 #define ERF_NOALIAS (1 << 3)
118 /*---------------------------------------------------------------------------
120 ---------------------------------------------------------------------------*/
121 /* Codes of tree nodes. */
122 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
123 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
126 #include "all-tree.def"
131 #undef END_OF_BASE_TREE_CODES
133 /* Number of language-independent tree codes. */
134 #define NUM_TREE_CODES \
135 ((int) LAST_AND_UNUSED_TREE_CODE)
137 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
138 (tree_contains_struct[(CODE)][(STRUCT)])
141 /* Classify which part of the compiler has defined a given builtin function.
142 Note that we assume below that this is no more than two bits. */
143 enum built_in_class
{
150 /* Last marker used for LTO stremaing of built_in_class. We can not add it
151 to the enum since we need the enumb to fit in 2 bits. */
152 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
154 /* Codes that identify the various built in functions
155 so that expand_call can identify them quickly. */
156 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
157 enum built_in_function
{
158 #include "builtins.def"
162 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
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"
167 END_CHKP_BUILTINS
= BEGIN_CHKP_BUILTINS
* 2 + 1,
169 /* Complex division routines in libgcc. These are done via builtins
170 because emit_library_call_value can't handle complex values. */
171 BUILT_IN_COMPLEX_MUL_MIN
,
172 BUILT_IN_COMPLEX_MUL_MAX
173 = BUILT_IN_COMPLEX_MUL_MIN
174 + MAX_MODE_COMPLEX_FLOAT
175 - MIN_MODE_COMPLEX_FLOAT
,
177 BUILT_IN_COMPLEX_DIV_MIN
,
178 BUILT_IN_COMPLEX_DIV_MAX
179 = BUILT_IN_COMPLEX_DIV_MIN
180 + MAX_MODE_COMPLEX_FLOAT
181 - MIN_MODE_COMPLEX_FLOAT
,
183 /* Upper bound on non-language-specific builtins. */
187 /* Tree code classes. Each tree_code has an associated code class
188 represented by a TREE_CODE_CLASS. */
189 enum tree_code_class
{
190 tcc_exceptional
, /* An exceptional code (fits no category). */
191 tcc_constant
, /* A constant. */
192 /* Order of tcc_type and tcc_declaration is important. */
193 tcc_type
, /* A type object code. */
194 tcc_declaration
, /* A declaration (also serving as variable refs). */
195 tcc_reference
, /* A reference to storage. */
196 tcc_comparison
, /* A comparison expression. */
197 tcc_unary
, /* A unary arithmetic expression. */
198 tcc_binary
, /* A binary arithmetic expression. */
199 tcc_statement
, /* A statement expression, which have side effects
200 but usually no interesting value. */
201 tcc_vl_exp
, /* A function call or other expression with a
202 variable-length operand vector. */
203 tcc_expression
/* Any other expression. */
206 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
207 the tables omp_clause_num_ops and omp_clause_code_name. */
208 enum omp_clause_code
{
209 /* Clause zero is special-cased inside the parser
210 (c_parser_omp_variable_list). */
211 OMP_CLAUSE_ERROR
= 0,
213 /* OpenACC/OpenMP clause: private (variable_list). */
216 /* OpenMP clause: shared (variable_list). */
219 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
220 OMP_CLAUSE_FIRSTPRIVATE
,
222 /* OpenMP clause: lastprivate (variable_list). */
223 OMP_CLAUSE_LASTPRIVATE
,
225 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
226 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
227 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
228 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
230 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
231 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
232 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
233 VAR_DECL placeholder, used like the above for C/C++ array
235 OMP_CLAUSE_REDUCTION
,
237 /* OpenMP clause: copyin (variable_list). */
240 /* OpenMP clause: copyprivate (variable_list). */
241 OMP_CLAUSE_COPYPRIVATE
,
243 /* OpenMP clause: linear (variable-list[:linear-step]). */
246 /* OpenMP clause: aligned (variable-list[:alignment]). */
249 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
252 /* OpenMP clause: uniform (argument-list). */
255 /* OpenMP clause: to (extended-list).
256 Only when it appears in declare target. */
257 OMP_CLAUSE_TO_DECLARE
,
259 /* OpenMP clause: link (variable-list). */
262 /* OpenMP clause: from (variable-list). */
265 /* OpenMP clause: to (variable-list). */
268 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
269 device, host (self), present, present_or_copy (pcopy), present_or_copyin
270 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
273 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
276 /* OpenMP clause: use_device_ptr (variable-list). */
277 OMP_CLAUSE_USE_DEVICE_PTR
,
279 /* OpenMP clause: is_device_ptr (variable-list). */
280 OMP_CLAUSE_IS_DEVICE_PTR
,
282 /* Internal structure to hold OpenACC cache directive's variable-list.
283 #pragma acc cache (variable-list). */
286 /* OpenACC clause: device_resident (variable_list). */
287 OMP_CLAUSE_DEVICE_RESIDENT
,
289 /* OpenACC clause: use_device (variable_list). */
290 OMP_CLAUSE_USE_DEVICE
,
292 /* OpenACC clause: gang [(gang-argument-list)].
294 gang-argument-list: [gang-argument-list, ] gang-argument
295 gang-argument: [num:] integer-expression
296 | static: size-expression
297 size-expression: * | integer-expression. */
300 /* OpenACC clause: async [(integer-expression)]. */
303 /* OpenACC clause: wait [(integer-expression-list)]. */
306 /* OpenACC clause: auto. */
309 /* OpenACC clause: seq. */
312 /* Internal clause: temporary for combined loops expansion. */
313 OMP_CLAUSE__LOOPTEMP_
,
315 /* OpenACC/OpenMP clause: if (scalar-expression). */
318 /* OpenMP clause: num_threads (integer-expression). */
319 OMP_CLAUSE_NUM_THREADS
,
321 /* OpenMP clause: schedule. */
324 /* OpenMP clause: nowait. */
327 /* OpenMP clause: ordered [(constant-integer-expression)]. */
330 /* OpenMP clause: default. */
333 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
336 /* OpenMP clause: untied. */
339 /* OpenMP clause: final (scalar-expression). */
342 /* OpenMP clause: mergeable. */
343 OMP_CLAUSE_MERGEABLE
,
345 /* OpenMP clause: device (integer-expression). */
348 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
349 OMP_CLAUSE_DIST_SCHEDULE
,
351 /* OpenMP clause: inbranch. */
354 /* OpenMP clause: notinbranch. */
355 OMP_CLAUSE_NOTINBRANCH
,
357 /* OpenMP clause: num_teams(integer-expression). */
358 OMP_CLAUSE_NUM_TEAMS
,
360 /* OpenMP clause: thread_limit(integer-expression). */
361 OMP_CLAUSE_THREAD_LIMIT
,
363 /* OpenMP clause: proc_bind ({master,close,spread}). */
364 OMP_CLAUSE_PROC_BIND
,
366 /* OpenMP clause: safelen (constant-integer-expression). */
369 /* OpenMP clause: simdlen (constant-integer-expression). */
372 /* OpenMP clause: for. */
375 /* OpenMP clause: parallel. */
378 /* OpenMP clause: sections. */
381 /* OpenMP clause: taskgroup. */
382 OMP_CLAUSE_TASKGROUP
,
384 /* OpenMP clause: priority (integer-expression). */
387 /* OpenMP clause: grainsize (integer-expression). */
388 OMP_CLAUSE_GRAINSIZE
,
390 /* OpenMP clause: num_tasks (integer-expression). */
391 OMP_CLAUSE_NUM_TASKS
,
393 /* OpenMP clause: nogroup. */
396 /* OpenMP clause: threads. */
399 /* OpenMP clause: simd. */
402 /* OpenMP clause: hint (integer-expression). */
405 /* OpenMP clause: defaultmap (tofrom: scalar). */
406 OMP_CLAUSE_DEFAULTMAP
,
408 /* Internally used only clause, holding SIMD uid. */
409 OMP_CLAUSE__SIMDUID_
,
411 /* Internally used only clause, holding _Cilk_for # of iterations
413 OMP_CLAUSE__CILK_FOR_COUNT_
,
415 /* OpenACC clause: independent. */
416 OMP_CLAUSE_INDEPENDENT
,
418 /* OpenACC clause: worker [( [num:] integer-expression)]. */
421 /* OpenACC clause: vector [( [length:] integer-expression)]. */
424 /* OpenACC clause: num_gangs (integer-expression). */
425 OMP_CLAUSE_NUM_GANGS
,
427 /* OpenACC clause: num_workers (integer-expression). */
428 OMP_CLAUSE_NUM_WORKERS
,
430 /* OpenACC clause: vector_length (integer-expression). */
431 OMP_CLAUSE_VECTOR_LENGTH
,
433 /* OpenACC clause: tile ( size-expr-list ). */
438 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
439 enum tree_node_structure_enum
{
440 #include "treestruct.def"
445 enum omp_clause_schedule_kind
{
446 OMP_CLAUSE_SCHEDULE_STATIC
,
447 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
448 OMP_CLAUSE_SCHEDULE_GUIDED
,
449 OMP_CLAUSE_SCHEDULE_AUTO
,
450 OMP_CLAUSE_SCHEDULE_RUNTIME
,
451 OMP_CLAUSE_SCHEDULE_CILKFOR
,
452 OMP_CLAUSE_SCHEDULE_MASK
= (1 << 3) - 1,
453 OMP_CLAUSE_SCHEDULE_MONOTONIC
= (1 << 3),
454 OMP_CLAUSE_SCHEDULE_NONMONOTONIC
= (1 << 4),
455 OMP_CLAUSE_SCHEDULE_LAST
= 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC
- 1
458 enum omp_clause_default_kind
{
459 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
460 OMP_CLAUSE_DEFAULT_SHARED
,
461 OMP_CLAUSE_DEFAULT_NONE
,
462 OMP_CLAUSE_DEFAULT_PRIVATE
,
463 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
464 OMP_CLAUSE_DEFAULT_LAST
467 /* There is a TYPE_QUAL value for each type qualifier. They can be
468 combined by bitwise-or to form the complete set of qualifiers for a
471 TYPE_UNQUALIFIED
= 0x0,
472 TYPE_QUAL_CONST
= 0x1,
473 TYPE_QUAL_VOLATILE
= 0x2,
474 TYPE_QUAL_RESTRICT
= 0x4,
475 TYPE_QUAL_ATOMIC
= 0x8
478 /* Standard named or nameless data types of the C compiler. */
508 TI_INTEGER_MINUS_ONE
,
525 TI_COMPLEX_INTEGER_TYPE
,
526 TI_COMPLEX_FLOAT_TYPE
,
527 TI_COMPLEX_DOUBLE_TYPE
,
528 TI_COMPLEX_LONG_DOUBLE_TYPE
,
536 TI_LONG_DOUBLE_PTR_TYPE
,
546 TI_VA_LIST_GPR_COUNTER_FIELD
,
547 TI_VA_LIST_FPR_COUNTER_FIELD
,
550 TI_POINTER_SIZED_TYPE
,
552 TI_POINTER_BOUNDS_TYPE
,
557 TI_DFLOAT32_PTR_TYPE
,
558 TI_DFLOAT64_PTR_TYPE
,
559 TI_DFLOAT128_PTR_TYPE
,
572 TI_SAT_ULLFRACT_TYPE
,
588 TI_SAT_ULLACCUM_TYPE
,
634 TI_OPTIMIZATION_DEFAULT
,
635 TI_OPTIMIZATION_CURRENT
,
636 TI_TARGET_OPTION_DEFAULT
,
637 TI_TARGET_OPTION_CURRENT
,
638 TI_CURRENT_TARGET_PRAGMA
,
639 TI_CURRENT_OPTIMIZE_PRAGMA
,
644 /* An enumeration of the standard C integer types. These must be
645 ordered so that shorter types appear before longer ones, and so
646 that signed types appear before unsigned ones, for the correct
647 functioning of interpret_integer() in c-lex.c. */
648 enum integer_type_kind
{
659 itk_unsigned_long_long
,
673 /* A pointer-to-function member type looks like:
680 If __pfn is NULL, it is a NULL pointer-to-member-function.
682 (Because the vtable is always the first thing in the object, we
683 don't need its offset.) If the function is virtual, then PFN is
684 one plus twice the index into the vtable; otherwise, it is just a
685 pointer to the function.
687 Unfortunately, using the lowest bit of PFN doesn't work in
688 architectures that don't impose alignment requirements on function
689 addresses, or that use the lowest bit to tell one ISA from another,
690 for example. For such architectures, we use the lowest bit of
691 DELTA instead of the lowest bit of the PFN, and DELTA will be
693 enum ptrmemfunc_vbit_where_t
{
694 ptrmemfunc_vbit_in_pfn
,
695 ptrmemfunc_vbit_in_delta
698 /* Flags that may be passed in the third argument of decl_attributes, and
699 to handler functions for attributes. */
700 enum attribute_flags
{
701 /* The type passed in is the type of a DECL, and any attributes that
702 should be passed in again to be applied to the DECL rather than the
703 type should be returned. */
704 ATTR_FLAG_DECL_NEXT
= 1,
705 /* The type passed in is a function return type, and any attributes that
706 should be passed in again to be applied to the function type rather
707 than the return type should be returned. */
708 ATTR_FLAG_FUNCTION_NEXT
= 2,
709 /* The type passed in is an array element type, and any attributes that
710 should be passed in again to be applied to the array type rather
711 than the element type should be returned. */
712 ATTR_FLAG_ARRAY_NEXT
= 4,
713 /* The type passed in is a structure, union or enumeration type being
714 created, and should be modified in place. */
715 ATTR_FLAG_TYPE_IN_PLACE
= 8,
716 /* The attributes are being applied by default to a library function whose
717 name indicates known behavior, and should be silently ignored if they
718 are not in fact compatible with the function type. */
719 ATTR_FLAG_BUILT_IN
= 16,
720 /* A given attribute has been parsed as a C++-11 attribute. */
724 /* Types used to represent sizes. */
725 enum size_type_kind
{
726 stk_sizetype
, /* Normal representation of sizes in bytes. */
727 stk_ssizetype
, /* Signed representation of sizes in bytes. */
728 stk_bitsizetype
, /* Normal representation of sizes in bits. */
729 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
733 enum operand_equal_flag
{
736 OEP_MATCH_SIDE_EFFECTS
= 4,
740 /* Enum and arrays used for tree allocation stats.
741 Keep in sync with tree.c:tree_node_kind_names. */
742 enum tree_node_kind
{
762 enum annot_expr_kind
{
763 annot_expr_ivdep_kind
,
764 annot_expr_no_vector_kind
,
765 annot_expr_vector_kind
,
769 /* Internal functions. */
771 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
772 #include "internal-fn.def"
776 /*---------------------------------------------------------------------------
778 ---------------------------------------------------------------------------*/
779 /* When processing aliases at the symbol table level, we need the
780 declaration of target. For this reason we need to queue aliases and
781 process them after all declarations has been produced. */
782 struct GTY(()) alias_pair
{
787 /* An initialization priority. */
788 typedef unsigned short priority_type
;
790 /* The type of a callback function for walking over tree structure. */
791 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
793 /* The type of a callback function that represents a custom walk_tree. */
794 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
795 void *, hash_set
<tree
> *);
798 /*---------------------------------------------------------------------------
800 ---------------------------------------------------------------------------*/
801 /* A tree node can represent a data type, a variable, an expression
802 or a statement. Each node has a TREE_CODE which says what kind of
803 thing it represents. Some common codes are:
804 INTEGER_TYPE -- represents a type of integers.
805 ARRAY_TYPE -- represents a type of pointer.
806 VAR_DECL -- represents a declared variable.
807 INTEGER_CST -- represents a constant integer value.
808 PLUS_EXPR -- represents a sum (an expression).
810 As for the contents of a tree node: there are some fields
811 that all nodes share. Each TREE_CODE has various special-purpose
812 fields as well. The fields of a node are never accessed directly,
813 always through accessor macros. */
815 /* Every kind of tree node starts with this structure,
816 so all nodes have these fields.
818 See the accessor macros, defined below, for documentation of the
819 fields, and the table below which connects the fields and the
822 struct GTY(()) tree_base
{
823 ENUM_BITFIELD(tree_code
) code
: 16;
825 unsigned side_effects_flag
: 1;
826 unsigned constant_flag
: 1;
827 unsigned addressable_flag
: 1;
828 unsigned volatile_flag
: 1;
829 unsigned readonly_flag
: 1;
830 unsigned asm_written_flag
: 1;
831 unsigned nowarning_flag
: 1;
832 unsigned visited
: 1;
834 unsigned used_flag
: 1;
835 unsigned nothrow_flag
: 1;
836 unsigned static_flag
: 1;
837 unsigned public_flag
: 1;
838 unsigned private_flag
: 1;
839 unsigned protected_flag
: 1;
840 unsigned deprecated_flag
: 1;
841 unsigned default_def_flag
: 1;
844 /* The bits in the following structure should only be used with
845 accessor macros that constrain inputs with tree checking. */
847 unsigned lang_flag_0
: 1;
848 unsigned lang_flag_1
: 1;
849 unsigned lang_flag_2
: 1;
850 unsigned lang_flag_3
: 1;
851 unsigned lang_flag_4
: 1;
852 unsigned lang_flag_5
: 1;
853 unsigned lang_flag_6
: 1;
854 unsigned saturating_flag
: 1;
856 unsigned unsigned_flag
: 1;
857 unsigned packed_flag
: 1;
858 unsigned user_align
: 1;
859 unsigned nameless_flag
: 1;
860 unsigned atomic_flag
: 1;
865 /* This field is only used with TREE_TYPE nodes; the only reason it is
866 present in tree_base instead of tree_type is to save space. The size
867 of the field must be large enough to hold addr_space_t values. */
868 unsigned address_space
: 8;
871 /* The following fields are present in tree_base to save space. The
872 nodes using them do not require any of the flags above and so can
873 make better use of the 4-byte sized word. */
875 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
877 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
878 its native precision. */
879 unsigned char unextended
;
881 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
882 wider precisions based on its TYPE_SIGN. */
883 unsigned char extended
;
885 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
886 offset_int precision, with smaller integers being extended
887 according to their TYPE_SIGN. This is equal to one of the two
888 fields above but is cached for speed. */
889 unsigned char offset
;
892 /* VEC length. This field is only used with TREE_VEC. */
895 /* SSA version number. This field is only used with SSA_NAME. */
896 unsigned int version
;
898 /* Internal function code. */
899 enum internal_fn ifn
;
901 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
902 expression trees and specify known data non-dependences. For
903 two memory references in a function they are known to not
904 alias if dependence_info.clique are equal and dependence_info.base
907 unsigned short clique
;
913 /* The following table lists the uses of each of the above flags and
914 for which types of nodes they are defined.
919 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
922 CONSTRUCTOR, IDENTIFIER_NODE
925 CALL_EXPR_TAILCALL in
931 PREDICT_EXPR_OUTCOME in
937 VAR_DECL, FUNCTION_DECL
940 TREE_NO_TRAMPOLINE in
946 TREE_SYMBOL_REFERENCED in
950 TARGET_EXPR, WITH_CLEANUP_EXPR
952 TRY_CATCH_IS_CLEANUP in
958 TYPE_REF_CAN_ALIAS_ALL in
959 POINTER_TYPE, REFERENCE_TYPE
967 TRANSACTION_EXPR_OUTER in
970 SSA_NAME_ANTI_RANGE_P in
976 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
979 VAR_DECL, FUNCTION_DECL
982 CONSTRUCTOR_NO_CLEARING in
988 CALL_EXPR_VA_ARG_PACK in
991 TYPE_CACHED_VALUES_P in
994 SAVE_EXPR_RESOLVED_P in
997 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
998 OMP_CLAUSE_LASTPRIVATE
1000 OMP_CLAUSE_PRIVATE_DEBUG in
1003 OMP_CLAUSE_LINEAR_NO_COPYIN in
1006 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1009 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1010 OMP_CLAUSE_REDUCTION
1012 TRANSACTION_EXPR_RELAXED in
1020 CALL_EXPR_RETURN_SLOT_OPT in
1026 OMP_PARALLEL_COMBINED in
1029 OMP_ATOMIC_SEQ_CST in
1032 OMP_CLAUSE_PRIVATE_OUTER_REF in
1035 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1038 TYPE_REF_IS_RVALUE in
1050 CALL_FROM_THUNK_P and
1051 CALL_ALLOCA_FOR_VAR_P in
1054 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1059 TREE_SIDE_EFFECTS in
1069 TREE_THIS_VOLATILE in
1092 TYPE_SIZES_GIMPLIFIED in
1106 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1107 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1110 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1130 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1132 SSA_NAME_IN_FREE_LIST in
1144 IDENTIFIER_TRANSPARENT_ALIAS in
1150 all trees (used liberally by many passes)
1154 TYPE_REVERSE_STORAGE_ORDER in
1155 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1160 VAR_DECL_IS_VIRTUAL_OPERAND in
1175 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1177 TYPE_VECTOR_OPAQUE in
1180 SSA_NAME_IS_DEFAULT_DEF in
1183 DECL_NONLOCAL_FRAME in
1186 REF_REVERSE_STORAGE_ORDER in
1187 BIT_FIELD_REF, MEM_REF
1190 struct GTY(()) tree_typed
{
1191 struct tree_base base
;
1195 struct GTY(()) tree_common
{
1196 struct tree_typed typed
;
1200 struct GTY(()) tree_int_cst
{
1201 struct tree_typed typed
;
1202 HOST_WIDE_INT val
[1];
1206 struct GTY(()) tree_real_cst
{
1207 struct tree_typed typed
;
1208 struct real_value
* real_cst_ptr
;
1211 struct GTY(()) tree_fixed_cst
{
1212 struct tree_typed typed
;
1213 struct fixed_value
* fixed_cst_ptr
;
1216 struct GTY(()) tree_string
{
1217 struct tree_typed typed
;
1222 struct GTY(()) tree_complex
{
1223 struct tree_typed typed
;
1228 struct GTY(()) tree_vector
{
1229 struct tree_typed typed
;
1230 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
1233 struct GTY(()) tree_identifier
{
1234 struct tree_common common
;
1235 struct ht_identifier id
;
1238 struct GTY(()) tree_list
{
1239 struct tree_common common
;
1244 struct GTY(()) tree_vec
{
1245 struct tree_common common
;
1246 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1249 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1250 element. INDEX can optionally design the position of VALUE: in arrays,
1251 it is the index where VALUE has to be placed; in structures, it is the
1252 FIELD_DECL of the member. */
1253 struct GTY(()) constructor_elt
{
1258 struct GTY(()) tree_constructor
{
1259 struct tree_typed typed
;
1260 vec
<constructor_elt
, va_gc
> *elts
;
1263 enum omp_clause_depend_kind
1265 OMP_CLAUSE_DEPEND_IN
,
1266 OMP_CLAUSE_DEPEND_OUT
,
1267 OMP_CLAUSE_DEPEND_INOUT
,
1268 OMP_CLAUSE_DEPEND_SOURCE
,
1269 OMP_CLAUSE_DEPEND_SINK
,
1270 OMP_CLAUSE_DEPEND_LAST
1273 enum omp_clause_proc_bind_kind
1275 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1276 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1277 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1278 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1279 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1280 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1281 OMP_CLAUSE_PROC_BIND_LAST
1284 enum omp_clause_linear_kind
1286 OMP_CLAUSE_LINEAR_DEFAULT
,
1287 OMP_CLAUSE_LINEAR_REF
,
1288 OMP_CLAUSE_LINEAR_VAL
,
1289 OMP_CLAUSE_LINEAR_UVAL
1292 struct GTY(()) tree_exp
{
1293 struct tree_typed typed
;
1295 tree
GTY ((special ("tree_exp"),
1296 desc ("TREE_CODE ((tree) &%0)")))
1300 /* Immediate use linking structure. This structure is used for maintaining
1301 a doubly linked list of uses of an SSA_NAME. */
1302 struct GTY(()) ssa_use_operand_t
{
1303 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1304 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1305 /* Immediate uses for a given SSA name are maintained as a cyclic
1306 list. To recognize the root of this list, the location field
1307 needs to point to the original SSA name. Since statements and
1308 SSA names are of different data types, we need this union. See
1309 the explanation in struct imm_use_iterator. */
1310 union { gimple
*stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1311 tree
*GTY((skip(""))) use
;
1314 struct GTY(()) tree_ssa_name
{
1315 struct tree_typed typed
;
1317 /* _DECL wrapped by this SSA name. */
1320 /* Statement that defines this SSA name. */
1323 /* Value range information. */
1324 union ssa_name_info_type
{
1325 /* Pointer attributes used for alias analysis. */
1326 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1327 /* Value range attributes used for zero/sign extension elimination. */
1328 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1329 } GTY ((desc ("%1.typed.type ?" \
1330 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1332 /* Immediate uses list for this SSA_NAME. */
1333 struct ssa_use_operand_t imm_uses
;
1336 struct GTY(()) phi_arg_d
{
1337 /* imm_use MUST be the first element in struct because we do some
1338 pointer arithmetic with it. See phi_arg_index_from_use. */
1339 struct ssa_use_operand_t imm_use
;
1344 struct GTY(()) tree_omp_clause
{
1345 struct tree_common common
;
1347 enum omp_clause_code code
;
1348 union omp_clause_subcode
{
1349 enum omp_clause_default_kind default_kind
;
1350 enum omp_clause_schedule_kind schedule_kind
;
1351 enum omp_clause_depend_kind depend_kind
;
1352 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1353 unsigned int map_kind
;
1354 enum omp_clause_proc_bind_kind proc_bind_kind
;
1355 enum tree_code reduction_code
;
1356 enum omp_clause_linear_kind linear_kind
;
1357 enum tree_code if_modifier
;
1358 } GTY ((skip
)) subcode
;
1360 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1362 gimple_seq gimple_reduction_init
;
1363 gimple_seq gimple_reduction_merge
;
1365 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1369 struct GTY(()) tree_block
{
1370 struct tree_base base
;
1373 unsigned abstract_flag
: 1;
1374 unsigned block_num
: 31;
1377 location_t end_locus
;
1380 vec
<tree
, va_gc
> *nonlocalized_vars
;
1384 tree abstract_origin
;
1385 tree fragment_origin
;
1386 tree fragment_chain
;
1388 /* Pointer to the DWARF lexical block. */
1389 struct die_struct
*die
;
1392 struct GTY(()) tree_type_common
{
1393 struct tree_common common
;
1399 unsigned int precision
: 10;
1400 unsigned no_force_blk_flag
: 1;
1401 unsigned needs_constructing_flag
: 1;
1402 unsigned transparent_aggr_flag
: 1;
1403 unsigned restrict_flag
: 1;
1404 unsigned contains_placeholder_bits
: 2;
1406 ENUM_BITFIELD(machine_mode
) mode
: 8;
1408 unsigned string_flag
: 1;
1409 unsigned lang_flag_0
: 1;
1410 unsigned lang_flag_1
: 1;
1411 unsigned lang_flag_2
: 1;
1412 unsigned lang_flag_3
: 1;
1413 unsigned lang_flag_4
: 1;
1414 unsigned lang_flag_5
: 1;
1415 unsigned lang_flag_6
: 1;
1418 alias_set_type alias_set
;
1421 union tree_type_symtab
{
1422 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1423 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1424 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1425 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1433 struct GTY(()) tree_type_with_lang_specific
{
1434 struct tree_type_common common
;
1435 /* Points to a structure whose details depend on the language in use. */
1436 struct lang_type
*lang_specific
;
1439 struct GTY(()) tree_type_non_common
{
1440 struct tree_type_with_lang_specific with_lang_specific
;
1447 struct GTY (()) tree_binfo
{
1448 struct tree_common common
;
1454 vec
<tree
, va_gc
> *base_accesses
;
1460 vec
<tree
, va_gc
> base_binfos
;
1463 struct GTY(()) tree_decl_minimal
{
1464 struct tree_common common
;
1471 struct GTY(()) tree_decl_common
{
1472 struct tree_decl_minimal common
;
1475 ENUM_BITFIELD(machine_mode
) mode
: 8;
1477 unsigned nonlocal_flag
: 1;
1478 unsigned virtual_flag
: 1;
1479 unsigned ignored_flag
: 1;
1480 unsigned abstract_flag
: 1;
1481 unsigned artificial_flag
: 1;
1482 unsigned preserve_flag
: 1;
1483 unsigned debug_expr_is_from
: 1;
1485 unsigned lang_flag_0
: 1;
1486 unsigned lang_flag_1
: 1;
1487 unsigned lang_flag_2
: 1;
1488 unsigned lang_flag_3
: 1;
1489 unsigned lang_flag_4
: 1;
1490 unsigned lang_flag_5
: 1;
1491 unsigned lang_flag_6
: 1;
1492 unsigned lang_flag_7
: 1;
1493 unsigned lang_flag_8
: 1;
1495 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1496 unsigned decl_flag_0
: 1;
1497 /* In FIELD_DECL, this is DECL_BIT_FIELD
1498 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1499 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1500 unsigned decl_flag_1
: 1;
1501 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1502 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1503 DECL_HAS_VALUE_EXPR_P. */
1504 unsigned decl_flag_2
: 1;
1506 unsigned decl_flag_3
: 1;
1507 /* Logically, these two would go in a theoretical base shared by var and
1509 unsigned gimple_reg_flag
: 1;
1510 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1511 unsigned decl_by_reference_flag
: 1;
1512 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1513 unsigned decl_read_flag
: 1;
1514 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1515 unsigned decl_nonshareable_flag
: 1;
1517 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1518 unsigned int off_align
: 8;
1520 /* 24 bits unused. */
1522 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1525 /* UID for points-to sets, stable over copying from inlining. */
1526 unsigned int pt_uid
;
1531 tree abstract_origin
;
1533 /* Points to a structure whose details depend on the language in use. */
1534 struct lang_decl
*lang_specific
;
1537 struct GTY(()) tree_decl_with_rtl
{
1538 struct tree_decl_common common
;
1542 struct GTY(()) tree_field_decl
{
1543 struct tree_decl_common common
;
1546 tree bit_field_type
;
1552 struct GTY(()) tree_label_decl
{
1553 struct tree_decl_with_rtl common
;
1555 int eh_landing_pad_nr
;
1558 struct GTY(()) tree_result_decl
{
1559 struct tree_decl_with_rtl common
;
1562 struct GTY(()) tree_const_decl
{
1563 struct tree_decl_common common
;
1566 struct GTY(()) tree_parm_decl
{
1567 struct tree_decl_with_rtl common
;
1571 struct GTY(()) tree_decl_with_vis
{
1572 struct tree_decl_with_rtl common
;
1573 tree assembler_name
;
1574 struct symtab_node
*symtab_node
;
1576 /* Belong to VAR_DECL exclusively. */
1577 unsigned defer_output
: 1;
1578 unsigned hard_register
: 1;
1579 unsigned common_flag
: 1;
1580 unsigned in_text_section
: 1;
1581 unsigned in_constant_pool
: 1;
1582 unsigned dllimport_flag
: 1;
1583 /* Don't belong to VAR_DECL exclusively. */
1584 unsigned weak_flag
: 1;
1586 unsigned seen_in_bind_expr
: 1;
1587 unsigned comdat_flag
: 1;
1588 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1589 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1590 unsigned visibility_specified
: 1;
1592 /* Belong to FUNCTION_DECL exclusively. */
1593 unsigned init_priority_p
: 1;
1594 /* Used by C++ only. Might become a generic decl flag. */
1595 unsigned shadowed_for_var_p
: 1;
1596 /* Belong to FUNCTION_DECL exclusively. */
1597 unsigned cxx_constructor
: 1;
1598 /* Belong to FUNCTION_DECL exclusively. */
1599 unsigned cxx_destructor
: 1;
1600 /* Belong to FUNCTION_DECL exclusively. */
1602 /* Belong to FUNCTION_DECL exclusively. */
1603 unsigned regdecl_flag
: 1;
1604 /* 14 unused bits. */
1607 struct GTY(()) tree_var_decl
{
1608 struct tree_decl_with_vis common
;
1611 struct GTY(()) tree_decl_non_common
{
1612 struct tree_decl_with_vis common
;
1613 /* Almost all FE's use this. */
1617 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1618 arguments/result/saved_tree fields by front ends. It was either inherit
1619 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1620 which seemed a bit strange. */
1622 struct GTY(()) tree_function_decl
{
1623 struct tree_decl_non_common common
;
1627 /* Arguments of the function. */
1629 /* The personality function. Used for stack unwinding. */
1632 /* Function specific options that are used by this function. */
1633 tree function_specific_target
; /* target options */
1634 tree function_specific_optimization
; /* optimization options */
1636 /* Generic function body. */
1638 /* Index within a virtual table. */
1641 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1642 DECL_FUNCTION_CODE. Otherwise unused.
1643 ??? The bitfield needs to be able to hold all target function
1645 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1646 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1648 unsigned static_ctor_flag
: 1;
1649 unsigned static_dtor_flag
: 1;
1651 unsigned uninlinable
: 1;
1652 unsigned possibly_inlined
: 1;
1653 unsigned novops_flag
: 1;
1654 unsigned returns_twice_flag
: 1;
1655 unsigned malloc_flag
: 1;
1656 unsigned operator_new_flag
: 1;
1657 unsigned declared_inline_flag
: 1;
1658 unsigned no_inline_warning_flag
: 1;
1660 unsigned no_instrument_function_entry_exit
: 1;
1661 unsigned no_limit_stack
: 1;
1662 unsigned disregard_inline_limits
: 1;
1663 unsigned pure_flag
: 1;
1664 unsigned looping_const_or_pure_flag
: 1;
1665 unsigned has_debug_args_flag
: 1;
1666 unsigned tm_clone_flag
: 1;
1667 unsigned versioned_function
: 1;
1671 struct GTY(()) tree_translation_unit_decl
{
1672 struct tree_decl_common common
;
1673 /* Source language of this translation unit. Used for DWARF output. */
1674 const char * GTY((skip(""))) language
;
1675 /* TODO: Non-optimization used to build this translation unit. */
1676 /* TODO: Root of a partial DWARF tree for global types and decls. */
1679 struct GTY(()) tree_type_decl
{
1680 struct tree_decl_non_common common
;
1684 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1686 struct tree_statement_list_node
*prev
;
1687 struct tree_statement_list_node
*next
;
1691 struct GTY(()) tree_statement_list
1693 struct tree_typed typed
;
1694 struct tree_statement_list_node
*head
;
1695 struct tree_statement_list_node
*tail
;
1699 /* Optimization options used by a function. */
1701 struct GTY(()) tree_optimization_option
{
1702 struct tree_common common
;
1704 /* The optimization options used by the user. */
1705 struct cl_optimization
*opts
;
1707 /* Target optabs for this set of optimization options. This is of
1708 type `struct target_optabs *'. */
1709 void *GTY ((atomic
)) optabs
;
1711 /* The value of this_target_optabs against which the optabs above were
1713 struct target_optabs
*GTY ((skip
)) base_optabs
;
1716 /* Forward declaration, defined in target-globals.h. */
1718 struct GTY(()) target_globals
;
1720 /* Target options used by a function. */
1722 struct GTY(()) tree_target_option
{
1723 struct tree_common common
;
1725 /* Target globals for the corresponding target option. */
1726 struct target_globals
*globals
;
1728 /* The optimization options used by the user. */
1729 struct cl_target_option
*opts
;
1732 /* Define the overall contents of a tree node.
1733 It may be any of the structures declared above
1734 for various types of node. */
1735 union GTY ((ptr_alias (union lang_tree_node
),
1736 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1737 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1738 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1739 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1740 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1741 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1742 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1743 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1744 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1745 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1746 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1747 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1748 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1749 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1750 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1752 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1753 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1754 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1755 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1756 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1757 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1758 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1759 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1760 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1761 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1762 translation_unit_decl
;
1763 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1764 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1765 type_with_lang_specific
;
1766 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1768 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1769 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1770 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1771 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1772 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1773 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1774 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1775 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1776 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1777 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1778 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1781 /* Structure describing an attribute and a function to handle it. */
1782 struct attribute_spec
{
1783 /* The name of the attribute (without any leading or trailing __),
1784 or NULL to mark the end of a table of attributes. */
1786 /* The minimum length of the list of arguments of the attribute. */
1788 /* The maximum length of the list of arguments of the attribute
1789 (-1 for no maximum). */
1791 /* Whether this attribute requires a DECL. If it does, it will be passed
1792 from types of DECLs, function return types and array element types to
1793 the DECLs, function types and array types respectively; but when
1794 applied to a type in any other circumstances, it will be ignored with
1795 a warning. (If greater control is desired for a given attribute,
1796 this should be false, and the flags argument to the handler may be
1797 used to gain greater control in that case.) */
1799 /* Whether this attribute requires a type. If it does, it will be passed
1800 from a DECL to the type of that DECL. */
1802 /* Whether this attribute requires a function (or method) type. If it does,
1803 it will be passed from a function pointer type to the target type,
1804 and from a function return type (which is not itself a function
1805 pointer type) to the function type. */
1806 bool function_type_required
;
1807 /* Function to handle this attribute. NODE points to the node to which
1808 the attribute is to be applied. If a DECL, it should be modified in
1809 place; if a TYPE, a copy should be created. NAME is the name of the
1810 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1811 of the arguments (which may be NULL). FLAGS gives further information
1812 about the context of the attribute. Afterwards, the attributes will
1813 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1814 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1815 as well as in any other cases when the attributes should not be added
1816 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1817 applied to another type or DECL later may be returned;
1818 otherwise the return value should be NULL_TREE. This pointer may be
1819 NULL if no special handling is required beyond the checks implied
1820 by the rest of this structure. */
1821 tree (*handler
) (tree
*node
, tree name
, tree args
,
1822 int flags
, bool *no_add_attrs
);
1823 /* Specifies if attribute affects type's identity. */
1824 bool affects_type_identity
;
1827 /* These functions allow a front-end to perform a manual layout of a
1828 RECORD_TYPE. (For instance, if the placement of subsequent fields
1829 depends on the placement of fields so far.) Begin by calling
1830 start_record_layout. Then, call place_field for each of the
1831 fields. Then, call finish_record_layout. See layout_type for the
1832 default way in which these functions are used. */
1833 typedef struct record_layout_info_s
{
1834 /* The RECORD_TYPE that we are laying out. */
1836 /* The offset into the record so far, in bytes, not including bits in
1839 /* The last known alignment of SIZE. */
1840 unsigned int offset_align
;
1841 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1843 /* The alignment of the record so far, in bits. */
1844 unsigned int record_align
;
1845 /* The alignment of the record so far, ignoring #pragma pack and
1846 __attribute__ ((packed)), in bits. */
1847 unsigned int unpacked_align
;
1848 /* The previous field laid out. */
1850 /* The static variables (i.e., class variables, as opposed to
1851 instance variables) encountered in T. */
1852 vec
<tree
, va_gc
> *pending_statics
;
1853 /* Bits remaining in the current alignment group */
1854 int remaining_in_alignment
;
1855 /* True if we've seen a packed field that didn't have normal
1856 alignment anyway. */
1857 int packed_maybe_necessary
;
1858 } *record_layout_info
;
1860 /* Iterator for going through the function arguments. */
1861 struct function_args_iterator
{
1862 tree next
; /* TREE_LIST pointing to the next argument */
1865 /* Structures to map from a tree to another tree. */
1866 struct GTY(()) tree_map_base
{
1870 /* Map from a tree to another tree. */
1872 struct GTY((for_user
)) tree_map
{
1873 struct tree_map_base base
;
1878 /* Map from a decl tree to another tree. */
1879 struct GTY((for_user
)) tree_decl_map
{
1880 struct tree_map_base base
;
1884 /* Map from a tree to an int. */
1885 struct GTY((for_user
)) tree_int_map
{
1886 struct tree_map_base base
;
1890 /* Map from a decl tree to a tree vector. */
1891 struct GTY((for_user
)) tree_vec_map
{
1892 struct tree_map_base base
;
1893 vec
<tree
, va_gc
> *to
;
1896 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1897 have to go towards the end of tree.h so that union tree_node is fully
1898 defined by this point. */
1900 /* Structure containing iterator state. */
1901 struct call_expr_arg_iterator
{
1902 tree t
; /* the call_expr */
1903 int n
; /* argument count */
1904 int i
; /* next argument index */
1907 struct const_call_expr_arg_iterator
{
1908 const_tree t
; /* the call_expr */
1909 int n
; /* argument count */
1910 int i
; /* next argument index */
1913 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1914 function, and flags. */
1915 struct GTY(()) builtin_info_type
{
1917 /* Whether the user can use <xxx> instead of explicitly using calls
1918 to __builtin_<xxx>. */
1919 unsigned implicit_p
: 1;
1920 /* Whether the user has provided a declaration of <xxx>. */
1921 unsigned declared_p
: 1;
1925 /*---------------------------------------------------------------------------
1927 ---------------------------------------------------------------------------*/
1928 /* Matrix describing the structures contained in a given tree code. */
1929 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1931 /* Class of tree given its code. */
1932 extern const enum tree_code_class tree_code_type
[];
1934 /* Each tree code class has an associated string representation.
1935 These must correspond to the tree_code_class entries. */
1936 extern const char *const tree_code_class_strings
[];
1938 /* Number of argument-words in each kind of tree-node. */
1939 extern const unsigned char tree_code_length
[];
1941 /* Vector of all alias pairs for global symbols. */
1942 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1944 /* Names of all the built_in classes. */
1945 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1947 /* Names of all the built_in functions. */
1948 extern const char * built_in_names
[(int) END_BUILTINS
];
1950 /* Number of operands and names for each OMP_CLAUSE node. */
1951 extern unsigned const char omp_clause_num_ops
[];
1952 extern const char * const omp_clause_code_name
[];
1954 /* A vector of all translation-units. */
1955 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1957 /* Vector of standard trees used by the C compiler. */
1958 extern GTY(()) tree global_trees
[TI_MAX
];
1960 /* The standard C integer types. Use integer_type_kind to index into
1962 extern GTY(()) tree integer_types
[itk_none
];
1964 /* Types used to represent sizes. */
1965 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1967 /* Arrays for keeping track of tree node statistics. */
1968 extern int tree_node_counts
[];
1969 extern int tree_node_sizes
[];
1971 /* True if we are in gimple form and the actions of the folders need to
1972 be restricted. False if we are not in gimple form and folding is not
1973 restricted to creating gimple expressions. */
1974 extern bool in_gimple_form
;
1976 /* Functional interface to the builtin functions. */
1977 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
1979 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1980 extern unsigned int maximum_field_alignment
;
1982 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1983 extern GTY(()) tree current_function_decl
;
1985 /* Nonzero means a FUNC_BEGIN label was emitted. */
1986 extern GTY(()) const char * current_function_func_begin_label
;
1988 #endif // GCC_TREE_CORE_H