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"
163 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
164 #undef DEF_BUILTIN_CHKP
165 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
166 ENUM##_CHKP = ENUM + BEGIN_CHKP_BUILTINS + 1,
167 #include "builtins.def"
168 #undef DEF_BUILTIN_CHKP
170 END_CHKP_BUILTINS
= BEGIN_CHKP_BUILTINS
* 2 + 1,
172 /* Complex division routines in libgcc. These are done via builtins
173 because emit_library_call_value can't handle complex values. */
174 BUILT_IN_COMPLEX_MUL_MIN
,
175 BUILT_IN_COMPLEX_MUL_MAX
176 = BUILT_IN_COMPLEX_MUL_MIN
177 + MAX_MODE_COMPLEX_FLOAT
178 - MIN_MODE_COMPLEX_FLOAT
,
180 BUILT_IN_COMPLEX_DIV_MIN
,
181 BUILT_IN_COMPLEX_DIV_MAX
182 = BUILT_IN_COMPLEX_DIV_MIN
183 + MAX_MODE_COMPLEX_FLOAT
184 - MIN_MODE_COMPLEX_FLOAT
,
186 /* Upper bound on non-language-specific builtins. */
191 /* Tree code classes. Each tree_code has an associated code class
192 represented by a TREE_CODE_CLASS. */
193 enum tree_code_class
{
194 tcc_exceptional
, /* An exceptional code (fits no category). */
195 tcc_constant
, /* A constant. */
196 /* Order of tcc_type and tcc_declaration is important. */
197 tcc_type
, /* A type object code. */
198 tcc_declaration
, /* A declaration (also serving as variable refs). */
199 tcc_reference
, /* A reference to storage. */
200 tcc_comparison
, /* A comparison expression. */
201 tcc_unary
, /* A unary arithmetic expression. */
202 tcc_binary
, /* A binary arithmetic expression. */
203 tcc_statement
, /* A statement expression, which have side effects
204 but usually no interesting value. */
205 tcc_vl_exp
, /* A function call or other expression with a
206 variable-length operand vector. */
207 tcc_expression
/* Any other expression. */
210 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
211 the tables omp_clause_num_ops and omp_clause_code_name. */
212 enum omp_clause_code
{
213 /* Clause zero is special-cased inside the parser
214 (c_parser_omp_variable_list). */
215 OMP_CLAUSE_ERROR
= 0,
217 /* OpenACC/OpenMP clause: private (variable_list). */
220 /* OpenMP clause: shared (variable_list). */
223 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
224 OMP_CLAUSE_FIRSTPRIVATE
,
226 /* OpenMP clause: lastprivate (variable_list). */
227 OMP_CLAUSE_LASTPRIVATE
,
229 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
230 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
231 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
232 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
234 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
235 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
236 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
237 VAR_DECL placeholder, used like the above for C/C++ array
239 OMP_CLAUSE_REDUCTION
,
241 /* OpenMP clause: copyin (variable_list). */
244 /* OpenMP clause: copyprivate (variable_list). */
245 OMP_CLAUSE_COPYPRIVATE
,
247 /* OpenMP clause: linear (variable-list[:linear-step]). */
250 /* OpenMP clause: aligned (variable-list[:alignment]). */
253 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
256 /* OpenMP clause: uniform (argument-list). */
259 /* OpenMP clause: to (extended-list).
260 Only when it appears in declare target. */
261 OMP_CLAUSE_TO_DECLARE
,
263 /* OpenMP clause: link (variable-list). */
266 /* OpenMP clause: from (variable-list). */
269 /* OpenMP clause: to (variable-list). */
272 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
273 device, host (self), present, present_or_copy (pcopy), present_or_copyin
274 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
277 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
280 /* OpenMP clause: use_device_ptr (variable-list). */
281 OMP_CLAUSE_USE_DEVICE_PTR
,
283 /* OpenMP clause: is_device_ptr (variable-list). */
284 OMP_CLAUSE_IS_DEVICE_PTR
,
286 /* Internal structure to hold OpenACC cache directive's variable-list.
287 #pragma acc cache (variable-list). */
290 /* OpenACC clause: device_resident (variable_list). */
291 OMP_CLAUSE_DEVICE_RESIDENT
,
293 /* OpenACC clause: use_device (variable_list). */
294 OMP_CLAUSE_USE_DEVICE
,
296 /* OpenACC clause: gang [(gang-argument-list)].
298 gang-argument-list: [gang-argument-list, ] gang-argument
299 gang-argument: [num:] integer-expression
300 | static: size-expression
301 size-expression: * | integer-expression. */
304 /* OpenACC clause: async [(integer-expression)]. */
307 /* OpenACC clause: wait [(integer-expression-list)]. */
310 /* OpenACC clause: auto. */
313 /* OpenACC clause: seq. */
316 /* Internal clause: temporary for combined loops expansion. */
317 OMP_CLAUSE__LOOPTEMP_
,
319 /* OpenACC/OpenMP clause: if (scalar-expression). */
322 /* OpenMP clause: num_threads (integer-expression). */
323 OMP_CLAUSE_NUM_THREADS
,
325 /* OpenMP clause: schedule. */
328 /* OpenMP clause: nowait. */
331 /* OpenMP clause: ordered [(constant-integer-expression)]. */
334 /* OpenMP clause: default. */
337 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
340 /* OpenMP clause: untied. */
343 /* OpenMP clause: final (scalar-expression). */
346 /* OpenMP clause: mergeable. */
347 OMP_CLAUSE_MERGEABLE
,
349 /* OpenMP clause: device (integer-expression). */
352 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
353 OMP_CLAUSE_DIST_SCHEDULE
,
355 /* OpenMP clause: inbranch. */
358 /* OpenMP clause: notinbranch. */
359 OMP_CLAUSE_NOTINBRANCH
,
361 /* OpenMP clause: num_teams(integer-expression). */
362 OMP_CLAUSE_NUM_TEAMS
,
364 /* OpenMP clause: thread_limit(integer-expression). */
365 OMP_CLAUSE_THREAD_LIMIT
,
367 /* OpenMP clause: proc_bind ({master,close,spread}). */
368 OMP_CLAUSE_PROC_BIND
,
370 /* OpenMP clause: safelen (constant-integer-expression). */
373 /* OpenMP clause: simdlen (constant-integer-expression). */
376 /* OpenMP clause: for. */
379 /* OpenMP clause: parallel. */
382 /* OpenMP clause: sections. */
385 /* OpenMP clause: taskgroup. */
386 OMP_CLAUSE_TASKGROUP
,
388 /* OpenMP clause: priority (integer-expression). */
391 /* OpenMP clause: grainsize (integer-expression). */
392 OMP_CLAUSE_GRAINSIZE
,
394 /* OpenMP clause: num_tasks (integer-expression). */
395 OMP_CLAUSE_NUM_TASKS
,
397 /* OpenMP clause: nogroup. */
400 /* OpenMP clause: threads. */
403 /* OpenMP clause: simd. */
406 /* OpenMP clause: hint (integer-expression). */
409 /* OpenMP clause: defaultmap (tofrom: scalar). */
410 OMP_CLAUSE_DEFAULTMAP
,
412 /* Internally used only clause, holding SIMD uid. */
413 OMP_CLAUSE__SIMDUID_
,
415 /* Internally used only clause, holding _Cilk_for # of iterations
417 OMP_CLAUSE__CILK_FOR_COUNT_
,
419 /* OpenACC clause: independent. */
420 OMP_CLAUSE_INDEPENDENT
,
422 /* OpenACC clause: worker [( [num:] integer-expression)]. */
425 /* OpenACC clause: vector [( [length:] integer-expression)]. */
428 /* OpenACC clause: num_gangs (integer-expression). */
429 OMP_CLAUSE_NUM_GANGS
,
431 /* OpenACC clause: num_workers (integer-expression). */
432 OMP_CLAUSE_NUM_WORKERS
,
434 /* OpenACC clause: vector_length (integer-expression). */
435 OMP_CLAUSE_VECTOR_LENGTH
439 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
440 enum tree_node_structure_enum
{
441 #include "treestruct.def"
446 enum omp_clause_schedule_kind
{
447 OMP_CLAUSE_SCHEDULE_STATIC
,
448 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
449 OMP_CLAUSE_SCHEDULE_GUIDED
,
450 OMP_CLAUSE_SCHEDULE_AUTO
,
451 OMP_CLAUSE_SCHEDULE_RUNTIME
,
452 OMP_CLAUSE_SCHEDULE_CILKFOR
,
453 OMP_CLAUSE_SCHEDULE_LAST
456 enum omp_clause_default_kind
{
457 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
458 OMP_CLAUSE_DEFAULT_SHARED
,
459 OMP_CLAUSE_DEFAULT_NONE
,
460 OMP_CLAUSE_DEFAULT_PRIVATE
,
461 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
462 OMP_CLAUSE_DEFAULT_LAST
465 /* There is a TYPE_QUAL value for each type qualifier. They can be
466 combined by bitwise-or to form the complete set of qualifiers for a
469 TYPE_UNQUALIFIED
= 0x0,
470 TYPE_QUAL_CONST
= 0x1,
471 TYPE_QUAL_VOLATILE
= 0x2,
472 TYPE_QUAL_RESTRICT
= 0x4,
473 TYPE_QUAL_ATOMIC
= 0x8
476 /* Standard named or nameless data types of the C compiler. */
506 TI_INTEGER_MINUS_ONE
,
523 TI_COMPLEX_INTEGER_TYPE
,
524 TI_COMPLEX_FLOAT_TYPE
,
525 TI_COMPLEX_DOUBLE_TYPE
,
526 TI_COMPLEX_LONG_DOUBLE_TYPE
,
534 TI_LONG_DOUBLE_PTR_TYPE
,
544 TI_VA_LIST_GPR_COUNTER_FIELD
,
545 TI_VA_LIST_FPR_COUNTER_FIELD
,
548 TI_POINTER_SIZED_TYPE
,
550 TI_POINTER_BOUNDS_TYPE
,
555 TI_DFLOAT32_PTR_TYPE
,
556 TI_DFLOAT64_PTR_TYPE
,
557 TI_DFLOAT128_PTR_TYPE
,
570 TI_SAT_ULLFRACT_TYPE
,
586 TI_SAT_ULLACCUM_TYPE
,
632 TI_OPTIMIZATION_DEFAULT
,
633 TI_OPTIMIZATION_CURRENT
,
634 TI_TARGET_OPTION_DEFAULT
,
635 TI_TARGET_OPTION_CURRENT
,
636 TI_CURRENT_TARGET_PRAGMA
,
637 TI_CURRENT_OPTIMIZE_PRAGMA
,
642 /* An enumeration of the standard C integer types. These must be
643 ordered so that shorter types appear before longer ones, and so
644 that signed types appear before unsigned ones, for the correct
645 functioning of interpret_integer() in c-lex.c. */
646 enum integer_type_kind
{
657 itk_unsigned_long_long
,
671 /* A pointer-to-function member type looks like:
678 If __pfn is NULL, it is a NULL pointer-to-member-function.
680 (Because the vtable is always the first thing in the object, we
681 don't need its offset.) If the function is virtual, then PFN is
682 one plus twice the index into the vtable; otherwise, it is just a
683 pointer to the function.
685 Unfortunately, using the lowest bit of PFN doesn't work in
686 architectures that don't impose alignment requirements on function
687 addresses, or that use the lowest bit to tell one ISA from another,
688 for example. For such architectures, we use the lowest bit of
689 DELTA instead of the lowest bit of the PFN, and DELTA will be
691 enum ptrmemfunc_vbit_where_t
{
692 ptrmemfunc_vbit_in_pfn
,
693 ptrmemfunc_vbit_in_delta
696 /* Flags that may be passed in the third argument of decl_attributes, and
697 to handler functions for attributes. */
698 enum attribute_flags
{
699 /* The type passed in is the type of a DECL, and any attributes that
700 should be passed in again to be applied to the DECL rather than the
701 type should be returned. */
702 ATTR_FLAG_DECL_NEXT
= 1,
703 /* The type passed in is a function return type, and any attributes that
704 should be passed in again to be applied to the function type rather
705 than the return type should be returned. */
706 ATTR_FLAG_FUNCTION_NEXT
= 2,
707 /* The type passed in is an array element type, and any attributes that
708 should be passed in again to be applied to the array type rather
709 than the element type should be returned. */
710 ATTR_FLAG_ARRAY_NEXT
= 4,
711 /* The type passed in is a structure, union or enumeration type being
712 created, and should be modified in place. */
713 ATTR_FLAG_TYPE_IN_PLACE
= 8,
714 /* The attributes are being applied by default to a library function whose
715 name indicates known behavior, and should be silently ignored if they
716 are not in fact compatible with the function type. */
717 ATTR_FLAG_BUILT_IN
= 16,
718 /* A given attribute has been parsed as a C++-11 attribute. */
722 /* Types used to represent sizes. */
723 enum size_type_kind
{
724 stk_sizetype
, /* Normal representation of sizes in bytes. */
725 stk_ssizetype
, /* Signed representation of sizes in bytes. */
726 stk_bitsizetype
, /* Normal representation of sizes in bits. */
727 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
731 enum operand_equal_flag
{
734 OEP_CONSTANT_ADDRESS_OF
= 4,
738 /* Enum and arrays used for tree allocation stats.
739 Keep in sync with tree.c:tree_node_kind_names. */
740 enum tree_node_kind
{
760 enum annot_expr_kind
{
761 annot_expr_ivdep_kind
,
762 annot_expr_no_vector_kind
,
763 annot_expr_vector_kind
,
767 /* Internal functions. */
769 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
770 #include "internal-fn.def"
771 #undef DEF_INTERNAL_FN
775 /*---------------------------------------------------------------------------
777 ---------------------------------------------------------------------------*/
778 /* When processing aliases at the symbol table level, we need the
779 declaration of target. For this reason we need to queue aliases and
780 process them after all declarations has been produced. */
781 struct GTY(()) alias_pair
{
786 /* An initialization priority. */
787 typedef unsigned short priority_type
;
789 /* The type of a callback function for walking over tree structure. */
790 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
792 /* The type of a callback function that represents a custom walk_tree. */
793 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
794 void *, hash_set
<tree
> *);
797 /*---------------------------------------------------------------------------
799 ---------------------------------------------------------------------------*/
800 /* A tree node can represent a data type, a variable, an expression
801 or a statement. Each node has a TREE_CODE which says what kind of
802 thing it represents. Some common codes are:
803 INTEGER_TYPE -- represents a type of integers.
804 ARRAY_TYPE -- represents a type of pointer.
805 VAR_DECL -- represents a declared variable.
806 INTEGER_CST -- represents a constant integer value.
807 PLUS_EXPR -- represents a sum (an expression).
809 As for the contents of a tree node: there are some fields
810 that all nodes share. Each TREE_CODE has various special-purpose
811 fields as well. The fields of a node are never accessed directly,
812 always through accessor macros. */
814 /* Every kind of tree node starts with this structure,
815 so all nodes have these fields.
817 See the accessor macros, defined below, for documentation of the
818 fields, and the table below which connects the fields and the
821 struct GTY(()) tree_base
{
822 ENUM_BITFIELD(tree_code
) code
: 16;
824 unsigned side_effects_flag
: 1;
825 unsigned constant_flag
: 1;
826 unsigned addressable_flag
: 1;
827 unsigned volatile_flag
: 1;
828 unsigned readonly_flag
: 1;
829 unsigned asm_written_flag
: 1;
830 unsigned nowarning_flag
: 1;
831 unsigned visited
: 1;
833 unsigned used_flag
: 1;
834 unsigned nothrow_flag
: 1;
835 unsigned static_flag
: 1;
836 unsigned public_flag
: 1;
837 unsigned private_flag
: 1;
838 unsigned protected_flag
: 1;
839 unsigned deprecated_flag
: 1;
840 unsigned default_def_flag
: 1;
843 /* The bits in the following structure should only be used with
844 accessor macros that constrain inputs with tree checking. */
846 unsigned lang_flag_0
: 1;
847 unsigned lang_flag_1
: 1;
848 unsigned lang_flag_2
: 1;
849 unsigned lang_flag_3
: 1;
850 unsigned lang_flag_4
: 1;
851 unsigned lang_flag_5
: 1;
852 unsigned lang_flag_6
: 1;
853 unsigned saturating_flag
: 1;
855 unsigned unsigned_flag
: 1;
856 unsigned packed_flag
: 1;
857 unsigned user_align
: 1;
858 unsigned nameless_flag
: 1;
859 unsigned atomic_flag
: 1;
864 /* This field is only used with TREE_TYPE nodes; the only reason it is
865 present in tree_base instead of tree_type is to save space. The size
866 of the field must be large enough to hold addr_space_t values. */
867 unsigned address_space
: 8;
870 /* The following fields are present in tree_base to save space. The
871 nodes using them do not require any of the flags above and so can
872 make better use of the 4-byte sized word. */
874 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
876 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
877 its native precision. */
878 unsigned char unextended
;
880 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
881 wider precisions based on its TYPE_SIGN. */
882 unsigned char extended
;
884 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
885 offset_int precision, with smaller integers being extended
886 according to their TYPE_SIGN. This is equal to one of the two
887 fields above but is cached for speed. */
888 unsigned char offset
;
891 /* VEC length. This field is only used with TREE_VEC. */
894 /* SSA version number. This field is only used with SSA_NAME. */
895 unsigned int version
;
897 /* Internal function code. */
898 enum internal_fn ifn
;
900 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
901 expression trees and specify known data non-dependences. For
902 two memory references in a function they are known to not
903 alias if dependence_info.clique are equal and dependence_info.base
906 unsigned short clique
;
912 /* The following table lists the uses of each of the above flags and
913 for which types of nodes they are defined.
918 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
921 CONSTRUCTOR, IDENTIFIER_NODE
924 CALL_EXPR_TAILCALL in
930 PREDICT_EXPR_OUTCOME in
936 VAR_DECL, FUNCTION_DECL
939 TREE_NO_TRAMPOLINE in
945 TREE_SYMBOL_REFERENCED in
949 TARGET_EXPR, WITH_CLEANUP_EXPR
951 TRY_CATCH_IS_CLEANUP in
957 TYPE_REF_CAN_ALIAS_ALL in
958 POINTER_TYPE, REFERENCE_TYPE
966 TRANSACTION_EXPR_OUTER in
969 SSA_NAME_ANTI_RANGE_P in
975 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
978 VAR_DECL, FUNCTION_DECL
981 CONSTRUCTOR_NO_CLEARING in
987 CALL_EXPR_VA_ARG_PACK in
990 TYPE_CACHED_VALUES_P in
993 SAVE_EXPR_RESOLVED_P in
996 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
997 OMP_CLAUSE_LASTPRIVATE
999 OMP_CLAUSE_PRIVATE_DEBUG in
1002 OMP_CLAUSE_LINEAR_NO_COPYIN in
1005 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1008 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1009 OMP_CLAUSE_REDUCTION
1011 TRANSACTION_EXPR_RELAXED in
1019 CALL_EXPR_RETURN_SLOT_OPT in
1025 OMP_PARALLEL_COMBINED in
1028 OMP_ATOMIC_SEQ_CST in
1031 OMP_CLAUSE_PRIVATE_OUTER_REF in
1034 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1037 TYPE_REF_IS_RVALUE in
1049 CALL_FROM_THUNK_P and
1050 CALL_ALLOCA_FOR_VAR_P in
1053 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1058 TREE_SIDE_EFFECTS in
1068 TREE_THIS_VOLATILE in
1091 TYPE_SIZES_GIMPLIFIED in
1105 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1106 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1109 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1129 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1131 SSA_NAME_IN_FREE_LIST in
1143 IDENTIFIER_TRANSPARENT_ALIAS in
1149 all trees (used liberally by many passes)
1156 VAR_DECL_IS_VIRTUAL_OPERAND in
1170 TYPE_VECTOR_OPAQUE in
1173 SSA_NAME_IS_DEFAULT_DEF in
1176 DECL_NONLOCAL_FRAME in
1180 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1183 struct GTY(()) tree_typed
{
1184 struct tree_base base
;
1188 struct GTY(()) tree_common
{
1189 struct tree_typed typed
;
1193 struct GTY(()) tree_int_cst
{
1194 struct tree_typed typed
;
1195 HOST_WIDE_INT val
[1];
1199 struct GTY(()) tree_real_cst
{
1200 struct tree_typed typed
;
1201 struct real_value
* real_cst_ptr
;
1204 struct GTY(()) tree_fixed_cst
{
1205 struct tree_typed typed
;
1206 struct fixed_value
* fixed_cst_ptr
;
1209 struct GTY(()) tree_string
{
1210 struct tree_typed typed
;
1215 struct GTY(()) tree_complex
{
1216 struct tree_typed typed
;
1221 struct GTY(()) tree_vector
{
1222 struct tree_typed typed
;
1223 tree
GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts
[1];
1226 struct GTY(()) tree_identifier
{
1227 struct tree_common common
;
1228 struct ht_identifier id
;
1231 struct GTY(()) tree_list
{
1232 struct tree_common common
;
1237 struct GTY(()) tree_vec
{
1238 struct tree_common common
;
1239 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1242 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1243 element. INDEX can optionally design the position of VALUE: in arrays,
1244 it is the index where VALUE has to be placed; in structures, it is the
1245 FIELD_DECL of the member. */
1246 struct GTY(()) constructor_elt
{
1251 struct GTY(()) tree_constructor
{
1252 struct tree_typed typed
;
1253 vec
<constructor_elt
, va_gc
> *elts
;
1256 enum omp_clause_depend_kind
1258 OMP_CLAUSE_DEPEND_IN
,
1259 OMP_CLAUSE_DEPEND_OUT
,
1260 OMP_CLAUSE_DEPEND_INOUT
,
1261 OMP_CLAUSE_DEPEND_SOURCE
,
1262 OMP_CLAUSE_DEPEND_SINK
,
1263 OMP_CLAUSE_DEPEND_LAST
1266 enum omp_clause_proc_bind_kind
1268 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1269 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1270 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1271 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1272 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1273 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1274 OMP_CLAUSE_PROC_BIND_LAST
1277 enum omp_clause_linear_kind
1279 OMP_CLAUSE_LINEAR_DEFAULT
,
1280 OMP_CLAUSE_LINEAR_REF
,
1281 OMP_CLAUSE_LINEAR_VAL
,
1282 OMP_CLAUSE_LINEAR_UVAL
1285 struct GTY(()) tree_exp
{
1286 struct tree_typed typed
;
1288 tree
GTY ((special ("tree_exp"),
1289 desc ("TREE_CODE ((tree) &%0)")))
1293 /* Immediate use linking structure. This structure is used for maintaining
1294 a doubly linked list of uses of an SSA_NAME. */
1295 struct GTY(()) ssa_use_operand_t
{
1296 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1297 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1298 /* Immediate uses for a given SSA name are maintained as a cyclic
1299 list. To recognize the root of this list, the location field
1300 needs to point to the original SSA name. Since statements and
1301 SSA names are of different data types, we need this union. See
1302 the explanation in struct imm_use_iterator. */
1303 union { gimple
*stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1304 tree
*GTY((skip(""))) use
;
1307 struct GTY(()) tree_ssa_name
{
1308 struct tree_typed typed
;
1310 /* _DECL wrapped by this SSA name. */
1313 /* Statement that defines this SSA name. */
1316 /* Value range information. */
1317 union ssa_name_info_type
{
1318 /* Pointer attributes used for alias analysis. */
1319 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1320 /* Value range attributes used for zero/sign extension elimination. */
1321 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1322 } GTY ((desc ("%1.typed.type ?" \
1323 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1325 /* Immediate uses list for this SSA_NAME. */
1326 struct ssa_use_operand_t imm_uses
;
1329 struct GTY(()) phi_arg_d
{
1330 /* imm_use MUST be the first element in struct because we do some
1331 pointer arithmetic with it. See phi_arg_index_from_use. */
1332 struct ssa_use_operand_t imm_use
;
1337 struct GTY(()) tree_omp_clause
{
1338 struct tree_common common
;
1340 enum omp_clause_code code
;
1341 union omp_clause_subcode
{
1342 enum omp_clause_default_kind default_kind
;
1343 enum omp_clause_schedule_kind schedule_kind
;
1344 enum omp_clause_depend_kind depend_kind
;
1345 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1346 unsigned int map_kind
;
1347 enum omp_clause_proc_bind_kind proc_bind_kind
;
1348 enum tree_code reduction_code
;
1349 enum omp_clause_linear_kind linear_kind
;
1350 enum tree_code if_modifier
;
1351 } GTY ((skip
)) subcode
;
1353 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1355 gimple_seq gimple_reduction_init
;
1356 gimple_seq gimple_reduction_merge
;
1358 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1362 struct GTY(()) tree_block
{
1363 struct tree_base base
;
1366 unsigned abstract_flag
: 1;
1367 unsigned block_num
: 31;
1370 location_t end_locus
;
1373 vec
<tree
, va_gc
> *nonlocalized_vars
;
1377 tree abstract_origin
;
1378 tree fragment_origin
;
1379 tree fragment_chain
;
1381 /* Pointer to the DWARF lexical block. */
1382 struct die_struct
*die
;
1385 struct GTY(()) tree_type_common
{
1386 struct tree_common common
;
1392 unsigned int precision
: 10;
1393 unsigned no_force_blk_flag
: 1;
1394 unsigned needs_constructing_flag
: 1;
1395 unsigned transparent_aggr_flag
: 1;
1396 unsigned restrict_flag
: 1;
1397 unsigned contains_placeholder_bits
: 2;
1399 ENUM_BITFIELD(machine_mode
) mode
: 8;
1401 unsigned string_flag
: 1;
1402 unsigned lang_flag_0
: 1;
1403 unsigned lang_flag_1
: 1;
1404 unsigned lang_flag_2
: 1;
1405 unsigned lang_flag_3
: 1;
1406 unsigned lang_flag_4
: 1;
1407 unsigned lang_flag_5
: 1;
1408 unsigned lang_flag_6
: 1;
1411 alias_set_type alias_set
;
1414 union tree_type_symtab
{
1415 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1416 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer
;
1417 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1418 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1426 struct GTY(()) tree_type_with_lang_specific
{
1427 struct tree_type_common common
;
1428 /* Points to a structure whose details depend on the language in use. */
1429 struct lang_type
*lang_specific
;
1432 struct GTY(()) tree_type_non_common
{
1433 struct tree_type_with_lang_specific with_lang_specific
;
1440 struct GTY (()) tree_binfo
{
1441 struct tree_common common
;
1447 vec
<tree
, va_gc
> *base_accesses
;
1453 vec
<tree
, va_gc
> base_binfos
;
1456 struct GTY(()) tree_decl_minimal
{
1457 struct tree_common common
;
1464 struct GTY(()) tree_decl_common
{
1465 struct tree_decl_minimal common
;
1468 ENUM_BITFIELD(machine_mode
) mode
: 8;
1470 unsigned nonlocal_flag
: 1;
1471 unsigned virtual_flag
: 1;
1472 unsigned ignored_flag
: 1;
1473 unsigned abstract_flag
: 1;
1474 unsigned artificial_flag
: 1;
1475 unsigned preserve_flag
: 1;
1476 unsigned debug_expr_is_from
: 1;
1478 unsigned lang_flag_0
: 1;
1479 unsigned lang_flag_1
: 1;
1480 unsigned lang_flag_2
: 1;
1481 unsigned lang_flag_3
: 1;
1482 unsigned lang_flag_4
: 1;
1483 unsigned lang_flag_5
: 1;
1484 unsigned lang_flag_6
: 1;
1485 unsigned lang_flag_7
: 1;
1486 unsigned lang_flag_8
: 1;
1488 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */
1489 unsigned decl_flag_0
: 1;
1490 /* In FIELD_DECL, this is DECL_BIT_FIELD
1491 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1492 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1493 unsigned decl_flag_1
: 1;
1494 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1495 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1496 DECL_HAS_VALUE_EXPR_P. */
1497 unsigned decl_flag_2
: 1;
1499 unsigned decl_flag_3
: 1;
1500 /* Logically, these two would go in a theoretical base shared by var and
1502 unsigned gimple_reg_flag
: 1;
1503 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1504 unsigned decl_by_reference_flag
: 1;
1505 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1506 unsigned decl_read_flag
: 1;
1507 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1508 unsigned decl_nonshareable_flag
: 1;
1510 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1511 unsigned int off_align
: 8;
1513 /* 24 bits unused. */
1515 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1518 /* UID for points-to sets, stable over copying from inlining. */
1519 unsigned int pt_uid
;
1524 tree abstract_origin
;
1526 /* Points to a structure whose details depend on the language in use. */
1527 struct lang_decl
*lang_specific
;
1530 struct GTY(()) tree_decl_with_rtl
{
1531 struct tree_decl_common common
;
1535 struct GTY(()) tree_field_decl
{
1536 struct tree_decl_common common
;
1539 tree bit_field_type
;
1545 struct GTY(()) tree_label_decl
{
1546 struct tree_decl_with_rtl common
;
1548 int eh_landing_pad_nr
;
1551 struct GTY(()) tree_result_decl
{
1552 struct tree_decl_with_rtl common
;
1555 struct GTY(()) tree_const_decl
{
1556 struct tree_decl_common common
;
1559 struct GTY(()) tree_parm_decl
{
1560 struct tree_decl_with_rtl common
;
1564 struct GTY(()) tree_decl_with_vis
{
1565 struct tree_decl_with_rtl common
;
1566 tree assembler_name
;
1567 struct symtab_node
*symtab_node
;
1569 /* Belong to VAR_DECL exclusively. */
1570 unsigned defer_output
: 1;
1571 unsigned hard_register
: 1;
1572 unsigned common_flag
: 1;
1573 unsigned in_text_section
: 1;
1574 unsigned in_constant_pool
: 1;
1575 unsigned dllimport_flag
: 1;
1576 /* Don't belong to VAR_DECL exclusively. */
1577 unsigned weak_flag
: 1;
1579 unsigned seen_in_bind_expr
: 1;
1580 unsigned comdat_flag
: 1;
1581 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1582 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1583 unsigned visibility_specified
: 1;
1585 /* Belong to FUNCTION_DECL exclusively. */
1586 unsigned init_priority_p
: 1;
1587 /* Used by C++ only. Might become a generic decl flag. */
1588 unsigned shadowed_for_var_p
: 1;
1589 /* Belong to FUNCTION_DECL exclusively. */
1590 unsigned cxx_constructor
: 1;
1591 /* Belong to FUNCTION_DECL exclusively. */
1592 unsigned cxx_destructor
: 1;
1593 /* Belong to FUNCTION_DECL exclusively. */
1595 /* Belong to FUNCTION_DECL exclusively. */
1596 unsigned regdecl_flag
: 1;
1597 /* 14 unused bits. */
1600 struct GTY(()) tree_var_decl
{
1601 struct tree_decl_with_vis common
;
1604 struct GTY(()) tree_decl_non_common
{
1605 struct tree_decl_with_vis common
;
1606 /* Almost all FE's use this. */
1610 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1611 arguments/result/saved_tree fields by front ends. It was either inherit
1612 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1613 which seemed a bit strange. */
1615 struct GTY(()) tree_function_decl
{
1616 struct tree_decl_non_common common
;
1620 /* Arguments of the function. */
1622 /* The personality function. Used for stack unwinding. */
1625 /* Function specific options that are used by this function. */
1626 tree function_specific_target
; /* target options */
1627 tree function_specific_optimization
; /* optimization options */
1629 /* Generic function body. */
1631 /* Index within a virtual table. */
1634 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1635 DECL_FUNCTION_CODE. Otherwise unused.
1636 ??? The bitfield needs to be able to hold all target function
1638 ENUM_BITFIELD(built_in_function
) function_code
: 12;
1639 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1641 unsigned static_ctor_flag
: 1;
1642 unsigned static_dtor_flag
: 1;
1644 unsigned uninlinable
: 1;
1645 unsigned possibly_inlined
: 1;
1646 unsigned novops_flag
: 1;
1647 unsigned returns_twice_flag
: 1;
1648 unsigned malloc_flag
: 1;
1649 unsigned operator_new_flag
: 1;
1650 unsigned declared_inline_flag
: 1;
1651 unsigned no_inline_warning_flag
: 1;
1653 unsigned no_instrument_function_entry_exit
: 1;
1654 unsigned no_limit_stack
: 1;
1655 unsigned disregard_inline_limits
: 1;
1656 unsigned pure_flag
: 1;
1657 unsigned looping_const_or_pure_flag
: 1;
1658 unsigned has_debug_args_flag
: 1;
1659 unsigned tm_clone_flag
: 1;
1660 unsigned versioned_function
: 1;
1664 struct GTY(()) tree_translation_unit_decl
{
1665 struct tree_decl_common common
;
1666 /* Source language of this translation unit. Used for DWARF output. */
1667 const char * GTY((skip(""))) language
;
1668 /* TODO: Non-optimization used to build this translation unit. */
1669 /* TODO: Root of a partial DWARF tree for global types and decls. */
1672 struct GTY(()) tree_type_decl
{
1673 struct tree_decl_non_common common
;
1677 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1679 struct tree_statement_list_node
*prev
;
1680 struct tree_statement_list_node
*next
;
1684 struct GTY(()) tree_statement_list
1686 struct tree_typed typed
;
1687 struct tree_statement_list_node
*head
;
1688 struct tree_statement_list_node
*tail
;
1692 /* Optimization options used by a function. */
1694 struct GTY(()) tree_optimization_option
{
1695 struct tree_common common
;
1697 /* The optimization options used by the user. */
1698 struct cl_optimization
*opts
;
1700 /* Target optabs for this set of optimization options. This is of
1701 type `struct target_optabs *'. */
1702 void *GTY ((atomic
)) optabs
;
1704 /* The value of this_target_optabs against which the optabs above were
1706 struct target_optabs
*GTY ((skip
)) base_optabs
;
1709 /* Forward declaration, defined in target-globals.h. */
1711 struct GTY(()) target_globals
;
1713 /* Target options used by a function. */
1715 struct GTY(()) tree_target_option
{
1716 struct tree_common common
;
1718 /* Target globals for the corresponding target option. */
1719 struct target_globals
*globals
;
1721 /* The optimization options used by the user. */
1722 struct cl_target_option
*opts
;
1725 /* Define the overall contents of a tree node.
1726 It may be any of the structures declared above
1727 for various types of node. */
1728 union GTY ((ptr_alias (union lang_tree_node
),
1729 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1730 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1731 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1732 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1733 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1734 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1735 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1736 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1737 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1738 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1739 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1740 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1741 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1742 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1743 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1745 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1746 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1747 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1748 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1749 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1750 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1751 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1752 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1753 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1754 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1755 translation_unit_decl
;
1756 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1757 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1758 type_with_lang_specific
;
1759 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
1761 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
1762 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
1763 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
1764 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
1765 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
1766 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
1767 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
1768 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
1769 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
1770 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
1771 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
1774 /* Structure describing an attribute and a function to handle it. */
1775 struct attribute_spec
{
1776 /* The name of the attribute (without any leading or trailing __),
1777 or NULL to mark the end of a table of attributes. */
1779 /* The minimum length of the list of arguments of the attribute. */
1781 /* The maximum length of the list of arguments of the attribute
1782 (-1 for no maximum). */
1784 /* Whether this attribute requires a DECL. If it does, it will be passed
1785 from types of DECLs, function return types and array element types to
1786 the DECLs, function types and array types respectively; but when
1787 applied to a type in any other circumstances, it will be ignored with
1788 a warning. (If greater control is desired for a given attribute,
1789 this should be false, and the flags argument to the handler may be
1790 used to gain greater control in that case.) */
1792 /* Whether this attribute requires a type. If it does, it will be passed
1793 from a DECL to the type of that DECL. */
1795 /* Whether this attribute requires a function (or method) type. If it does,
1796 it will be passed from a function pointer type to the target type,
1797 and from a function return type (which is not itself a function
1798 pointer type) to the function type. */
1799 bool function_type_required
;
1800 /* Function to handle this attribute. NODE points to the node to which
1801 the attribute is to be applied. If a DECL, it should be modified in
1802 place; if a TYPE, a copy should be created. NAME is the name of the
1803 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1804 of the arguments (which may be NULL). FLAGS gives further information
1805 about the context of the attribute. Afterwards, the attributes will
1806 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1807 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1808 as well as in any other cases when the attributes should not be added
1809 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1810 applied to another type or DECL later may be returned;
1811 otherwise the return value should be NULL_TREE. This pointer may be
1812 NULL if no special handling is required beyond the checks implied
1813 by the rest of this structure. */
1814 tree (*handler
) (tree
*node
, tree name
, tree args
,
1815 int flags
, bool *no_add_attrs
);
1816 /* Specifies if attribute affects type's identity. */
1817 bool affects_type_identity
;
1820 /* These functions allow a front-end to perform a manual layout of a
1821 RECORD_TYPE. (For instance, if the placement of subsequent fields
1822 depends on the placement of fields so far.) Begin by calling
1823 start_record_layout. Then, call place_field for each of the
1824 fields. Then, call finish_record_layout. See layout_type for the
1825 default way in which these functions are used. */
1826 typedef struct record_layout_info_s
{
1827 /* The RECORD_TYPE that we are laying out. */
1829 /* The offset into the record so far, in bytes, not including bits in
1832 /* The last known alignment of SIZE. */
1833 unsigned int offset_align
;
1834 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1836 /* The alignment of the record so far, in bits. */
1837 unsigned int record_align
;
1838 /* The alignment of the record so far, ignoring #pragma pack and
1839 __attribute__ ((packed)), in bits. */
1840 unsigned int unpacked_align
;
1841 /* The previous field laid out. */
1843 /* The static variables (i.e., class variables, as opposed to
1844 instance variables) encountered in T. */
1845 vec
<tree
, va_gc
> *pending_statics
;
1846 /* Bits remaining in the current alignment group */
1847 int remaining_in_alignment
;
1848 /* True if we've seen a packed field that didn't have normal
1849 alignment anyway. */
1850 int packed_maybe_necessary
;
1851 } *record_layout_info
;
1853 /* Iterator for going through the function arguments. */
1854 struct function_args_iterator
{
1855 tree next
; /* TREE_LIST pointing to the next argument */
1858 /* Structures to map from a tree to another tree. */
1859 struct GTY(()) tree_map_base
{
1863 /* Map from a tree to another tree. */
1865 struct GTY((for_user
)) tree_map
{
1866 struct tree_map_base base
;
1871 /* Map from a decl tree to another tree. */
1872 struct GTY((for_user
)) tree_decl_map
{
1873 struct tree_map_base base
;
1877 /* Map from a tree to an int. */
1878 struct GTY((for_user
)) tree_int_map
{
1879 struct tree_map_base base
;
1883 /* Map from a decl tree to a tree vector. */
1884 struct GTY((for_user
)) tree_vec_map
{
1885 struct tree_map_base base
;
1886 vec
<tree
, va_gc
> *to
;
1889 /* Abstract iterators for CALL_EXPRs. These static inline definitions
1890 have to go towards the end of tree.h so that union tree_node is fully
1891 defined by this point. */
1893 /* Structure containing iterator state. */
1894 struct call_expr_arg_iterator
{
1895 tree t
; /* the call_expr */
1896 int n
; /* argument count */
1897 int i
; /* next argument index */
1900 struct const_call_expr_arg_iterator
{
1901 const_tree t
; /* the call_expr */
1902 int n
; /* argument count */
1903 int i
; /* next argument index */
1906 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1907 function, and flags. */
1908 struct GTY(()) builtin_info_type
{
1910 /* Whether the user can use <xxx> instead of explicitly using calls
1911 to __builtin_<xxx>. */
1912 unsigned implicit_p
: 1;
1913 /* Whether the user has provided a declaration of <xxx>. */
1914 unsigned declared_p
: 1;
1918 /*---------------------------------------------------------------------------
1920 ---------------------------------------------------------------------------*/
1921 /* Matrix describing the structures contained in a given tree code. */
1922 extern unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
1924 /* Class of tree given its code. */
1925 extern const enum tree_code_class tree_code_type
[];
1927 /* Each tree code class has an associated string representation.
1928 These must correspond to the tree_code_class entries. */
1929 extern const char *const tree_code_class_strings
[];
1931 /* Number of argument-words in each kind of tree-node. */
1932 extern const unsigned char tree_code_length
[];
1934 /* Vector of all alias pairs for global symbols. */
1935 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
1937 /* Names of all the built_in classes. */
1938 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
1940 /* Names of all the built_in functions. */
1941 extern const char * built_in_names
[(int) END_BUILTINS
];
1943 /* Number of operands and names for each OMP_CLAUSE node. */
1944 extern unsigned const char omp_clause_num_ops
[];
1945 extern const char * const omp_clause_code_name
[];
1947 /* A vector of all translation-units. */
1948 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
1950 /* Vector of standard trees used by the C compiler. */
1951 extern GTY(()) tree global_trees
[TI_MAX
];
1953 /* The standard C integer types. Use integer_type_kind to index into
1955 extern GTY(()) tree integer_types
[itk_none
];
1957 /* Types used to represent sizes. */
1958 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
1960 /* Arrays for keeping track of tree node statistics. */
1961 extern int tree_node_counts
[];
1962 extern int tree_node_sizes
[];
1964 /* True if we are in gimple form and the actions of the folders need to
1965 be restricted. False if we are not in gimple form and folding is not
1966 restricted to creating gimple expressions. */
1967 extern bool in_gimple_form
;
1969 /* Functional interface to the builtin functions. */
1970 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
1972 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
1973 extern unsigned int maximum_field_alignment
;
1975 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
1976 extern GTY(()) tree current_function_decl
;
1978 /* Nonzero means a FUNC_BEGIN label was emitted. */
1979 extern GTY(()) const char * current_function_func_begin_label
;
1981 #endif // GCC_TREE_CORE_H