1 /* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2020 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 returns its first argument. */
85 #define ECF_RET1 (1 << 11)
87 /* Nonzero if this call does not affect transactions. */
88 #define ECF_TM_PURE (1 << 12)
90 /* Nonzero if this call is into the transaction runtime library. */
91 #define ECF_TM_BUILTIN (1 << 13)
93 /* Nonzero if this is an indirect call by descriptor. */
94 #define ECF_BY_DESCRIPTOR (1 << 14)
96 /* Nonzero if this is a cold function. */
97 #define ECF_COLD (1 << 15)
99 /* Call argument flags. */
100 /* Nonzero if the argument is not dereferenced recursively, thus only
101 directly reachable memory is read or written. */
102 #define EAF_DIRECT (1 << 0)
104 /* Nonzero if memory reached by the argument is not clobbered. */
105 #define EAF_NOCLOBBER (1 << 1)
107 /* Nonzero if the argument does not escape. */
108 #define EAF_NOESCAPE (1 << 2)
110 /* Nonzero if the argument is not used by the function. */
111 #define EAF_UNUSED (1 << 3)
113 /* Call return flags. */
114 /* Mask for the argument number that is returned. Lower two bits of
115 the return flags, encodes argument slots zero to three. */
116 #define ERF_RETURN_ARG_MASK (3)
118 /* Nonzero if the return value is equal to the argument number
119 flags & ERF_RETURN_ARG_MASK. */
120 #define ERF_RETURNS_ARG (1 << 2)
122 /* Nonzero if the return value does not alias with anything. Functions
123 with the malloc attribute have this set on their return value. */
124 #define ERF_NOALIAS (1 << 3)
127 /*---------------------------------------------------------------------------
129 ---------------------------------------------------------------------------*/
130 /* Codes of tree nodes. */
131 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
132 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
135 #include "all-tree.def"
140 #undef END_OF_BASE_TREE_CODES
142 /* Number of language-independent tree codes. */
143 #define NUM_TREE_CODES \
144 ((int) LAST_AND_UNUSED_TREE_CODE)
146 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
147 (tree_contains_struct[(CODE)][(STRUCT)])
150 /* Classify which part of the compiler has defined a given builtin function.
151 Note that we assume below that this is no more than two bits. */
152 enum built_in_class
{
159 /* Last marker used for LTO stremaing of built_in_class. We cannot add it
160 to the enum since we need the enumb to fit in 2 bits. */
161 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
163 /* Codes that identify the various built in functions
164 so that expand_call can identify them quickly. */
165 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
166 enum built_in_function
{
167 #include "builtins.def"
168 /* Complex division routines in libgcc. These are done via builtins
169 because emit_library_call_value can't handle complex values. */
170 BUILT_IN_COMPLEX_MUL_MIN
,
171 BUILT_IN_COMPLEX_MUL_MAX
172 = BUILT_IN_COMPLEX_MUL_MIN
173 + MAX_MODE_COMPLEX_FLOAT
174 - MIN_MODE_COMPLEX_FLOAT
,
176 BUILT_IN_COMPLEX_DIV_MIN
,
177 BUILT_IN_COMPLEX_DIV_MAX
178 = BUILT_IN_COMPLEX_DIV_MIN
179 + MAX_MODE_COMPLEX_FLOAT
180 - MIN_MODE_COMPLEX_FLOAT
,
182 /* Upper bound on non-language-specific builtins. */
186 /* Internal functions. */
188 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
189 #include "internal-fn.def"
193 /* An enum that combines target-independent built-in functions with
194 internal functions, so that they can be treated in a similar way.
195 The numbers for built-in functions are the same as for the
196 built_in_function enum. The numbers for internal functions
197 start at END_BUITLINS. */
199 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
200 CFN_##ENUM = int (ENUM),
201 #include "builtins.def"
204 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) \
205 CFN_##CODE = int (END_BUILTINS) + int (IFN_##CODE),
206 #include "internal-fn.def"
211 /* Tree code classes. Each tree_code has an associated code class
212 represented by a TREE_CODE_CLASS. */
213 enum tree_code_class
{
214 tcc_exceptional
, /* An exceptional code (fits no category). */
215 tcc_constant
, /* A constant. */
216 /* Order of tcc_type and tcc_declaration is important. */
217 tcc_type
, /* A type object code. */
218 tcc_declaration
, /* A declaration (also serving as variable refs). */
219 tcc_reference
, /* A reference to storage. */
220 tcc_comparison
, /* A comparison expression. */
221 tcc_unary
, /* A unary arithmetic expression. */
222 tcc_binary
, /* A binary arithmetic expression. */
223 tcc_statement
, /* A statement expression, which have side effects
224 but usually no interesting value. */
225 tcc_vl_exp
, /* A function call or other expression with a
226 variable-length operand vector. */
227 tcc_expression
/* Any other expression. */
230 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into
231 the tables omp_clause_num_ops and omp_clause_code_name. */
232 enum omp_clause_code
{
233 /* Clause zero is special-cased inside the parser
234 (c_parser_omp_variable_list). */
235 OMP_CLAUSE_ERROR
= 0,
237 /* OpenACC/OpenMP clause: private (variable_list). */
240 /* OpenMP clause: shared (variable_list). */
243 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
244 OMP_CLAUSE_FIRSTPRIVATE
,
246 /* OpenMP clause: lastprivate (variable_list). */
247 OMP_CLAUSE_LASTPRIVATE
,
249 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
250 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
251 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
252 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
254 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
255 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
256 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
257 VAR_DECL placeholder, used like the above for C/C++ array
259 OMP_CLAUSE_REDUCTION
,
261 /* OpenMP clause: task_reduction (operator:variable_list). */
262 OMP_CLAUSE_TASK_REDUCTION
,
264 /* OpenMP clause: in_reduction (operator:variable_list). */
265 OMP_CLAUSE_IN_REDUCTION
,
267 /* OpenMP clause: copyin (variable_list). */
270 /* OpenMP clause: copyprivate (variable_list). */
271 OMP_CLAUSE_COPYPRIVATE
,
273 /* OpenMP clause: linear (variable-list[:linear-step]). */
276 /* OpenMP clause: aligned (variable-list[:alignment]). */
279 /* OpenMP clause: allocate ([allocator:]variable-list). */
282 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
285 /* OpenMP clause: nontemporal (variable-list). */
286 OMP_CLAUSE_NONTEMPORAL
,
288 /* OpenMP clause: uniform (argument-list). */
291 /* OpenMP clause: to (extended-list).
292 Only when it appears in declare target. */
293 OMP_CLAUSE_TO_DECLARE
,
295 /* OpenMP clause: link (variable-list). */
298 /* OpenMP clause: from (variable-list). */
301 /* OpenMP clause: to (variable-list). */
304 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
305 device, host (self), present, present_or_copy (pcopy), present_or_copyin
306 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
309 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
312 /* OpenACC clause: use_device (variable-list).
313 OpenMP clause: use_device_ptr (ptr-list). */
314 OMP_CLAUSE_USE_DEVICE_PTR
,
316 /* OpenMP clause: use_device_addr (variable-list). */
317 OMP_CLAUSE_USE_DEVICE_ADDR
,
319 /* OpenMP clause: is_device_ptr (variable-list). */
320 OMP_CLAUSE_IS_DEVICE_PTR
,
322 /* OpenMP clause: inclusive (variable-list). */
323 OMP_CLAUSE_INCLUSIVE
,
325 /* OpenMP clause: exclusive (variable-list). */
326 OMP_CLAUSE_EXCLUSIVE
,
328 /* Internal structure to hold OpenACC cache directive's variable-list.
329 #pragma acc cache (variable-list). */
332 /* OpenACC clause: gang [(gang-argument-list)].
334 gang-argument-list: [gang-argument-list, ] gang-argument
335 gang-argument: [num:] integer-expression
336 | static: size-expression
337 size-expression: * | integer-expression. */
340 /* OpenACC clause: async [(integer-expression)]. */
343 /* OpenACC clause: wait [(integer-expression-list)]. */
346 /* OpenACC clause: auto. */
349 /* OpenACC clause: seq. */
352 /* Internal clause: temporary for combined loops expansion. */
353 OMP_CLAUSE__LOOPTEMP_
,
355 /* Internal clause: temporary for task reductions. */
356 OMP_CLAUSE__REDUCTEMP_
,
358 /* Internal clause: temporary for lastprivate(conditional:). */
359 OMP_CLAUSE__CONDTEMP_
,
361 /* Internal clause: temporary for inscan reductions. */
362 OMP_CLAUSE__SCANTEMP_
,
364 /* OpenACC/OpenMP clause: if (scalar-expression). */
367 /* OpenMP clause: num_threads (integer-expression). */
368 OMP_CLAUSE_NUM_THREADS
,
370 /* OpenMP clause: schedule. */
373 /* OpenMP clause: nowait. */
376 /* OpenMP clause: ordered [(constant-integer-expression)]. */
379 /* OpenACC/OpenMP clause: default. */
382 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
385 /* OpenMP clause: untied. */
388 /* OpenMP clause: final (scalar-expression). */
391 /* OpenMP clause: mergeable. */
392 OMP_CLAUSE_MERGEABLE
,
394 /* OpenMP clause: device (integer-expression). */
397 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
398 OMP_CLAUSE_DIST_SCHEDULE
,
400 /* OpenMP clause: inbranch. */
403 /* OpenMP clause: notinbranch. */
404 OMP_CLAUSE_NOTINBRANCH
,
406 /* OpenMP clause: num_teams(integer-expression). */
407 OMP_CLAUSE_NUM_TEAMS
,
409 /* OpenMP clause: thread_limit(integer-expression). */
410 OMP_CLAUSE_THREAD_LIMIT
,
412 /* OpenMP clause: proc_bind ({master,close,spread}). */
413 OMP_CLAUSE_PROC_BIND
,
415 /* OpenMP clause: safelen (constant-integer-expression). */
418 /* OpenMP clause: simdlen (constant-integer-expression). */
421 /* OpenMP clause: device_type ({host,nohost,any}). */
422 OMP_CLAUSE_DEVICE_TYPE
,
424 /* OpenMP clause: for. */
427 /* OpenMP clause: parallel. */
430 /* OpenMP clause: sections. */
433 /* OpenMP clause: taskgroup. */
434 OMP_CLAUSE_TASKGROUP
,
436 /* OpenMP clause: priority (integer-expression). */
439 /* OpenMP clause: grainsize (integer-expression). */
440 OMP_CLAUSE_GRAINSIZE
,
442 /* OpenMP clause: num_tasks (integer-expression). */
443 OMP_CLAUSE_NUM_TASKS
,
445 /* OpenMP clause: nogroup. */
448 /* OpenMP clause: threads. */
451 /* OpenMP clause: simd. */
454 /* OpenMP clause: hint (integer-expression). */
457 /* OpenMP clause: defaultmap (tofrom: scalar). */
458 OMP_CLAUSE_DEFAULTMAP
,
460 /* OpenMP clause: order (concurrent). */
463 /* OpenMP clause: bind (binding). */
466 /* Internally used only clause, holding SIMD uid. */
467 OMP_CLAUSE__SIMDUID_
,
469 /* Internally used only clause, flag whether this is SIMT simd
473 /* OpenACC clause: independent. */
474 OMP_CLAUSE_INDEPENDENT
,
476 /* OpenACC clause: worker [( [num:] integer-expression)]. */
479 /* OpenACC clause: vector [( [length:] integer-expression)]. */
482 /* OpenACC clause: num_gangs (integer-expression). */
483 OMP_CLAUSE_NUM_GANGS
,
485 /* OpenACC clause: num_workers (integer-expression). */
486 OMP_CLAUSE_NUM_WORKERS
,
488 /* OpenACC clause: vector_length (integer-expression). */
489 OMP_CLAUSE_VECTOR_LENGTH
,
491 /* OpenACC clause: tile ( size-expr-list ). */
494 /* OpenACC clause: if_present. */
495 OMP_CLAUSE_IF_PRESENT
,
497 /* OpenACC clause: finalize. */
502 #define DEFTREESTRUCT(ENUM, NAME) ENUM,
503 enum tree_node_structure_enum
{
504 #include "treestruct.def"
509 enum omp_clause_schedule_kind
{
510 OMP_CLAUSE_SCHEDULE_STATIC
,
511 OMP_CLAUSE_SCHEDULE_DYNAMIC
,
512 OMP_CLAUSE_SCHEDULE_GUIDED
,
513 OMP_CLAUSE_SCHEDULE_AUTO
,
514 OMP_CLAUSE_SCHEDULE_RUNTIME
,
515 OMP_CLAUSE_SCHEDULE_MASK
= (1 << 3) - 1,
516 OMP_CLAUSE_SCHEDULE_MONOTONIC
= (1 << 3),
517 OMP_CLAUSE_SCHEDULE_NONMONOTONIC
= (1 << 4),
518 OMP_CLAUSE_SCHEDULE_LAST
= 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC
- 1
521 enum omp_clause_default_kind
{
522 OMP_CLAUSE_DEFAULT_UNSPECIFIED
,
523 OMP_CLAUSE_DEFAULT_SHARED
,
524 OMP_CLAUSE_DEFAULT_NONE
,
525 OMP_CLAUSE_DEFAULT_PRIVATE
,
526 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE
,
527 OMP_CLAUSE_DEFAULT_PRESENT
,
528 OMP_CLAUSE_DEFAULT_LAST
531 enum omp_clause_defaultmap_kind
{
532 OMP_CLAUSE_DEFAULTMAP_CATEGORY_UNSPECIFIED
,
533 OMP_CLAUSE_DEFAULTMAP_CATEGORY_SCALAR
,
534 OMP_CLAUSE_DEFAULTMAP_CATEGORY_AGGREGATE
,
535 OMP_CLAUSE_DEFAULTMAP_CATEGORY_ALLOCATABLE
,
536 OMP_CLAUSE_DEFAULTMAP_CATEGORY_POINTER
,
537 OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
= 7,
538 OMP_CLAUSE_DEFAULTMAP_ALLOC
= 1 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
539 OMP_CLAUSE_DEFAULTMAP_TO
= 2 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
540 OMP_CLAUSE_DEFAULTMAP_FROM
= 3 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
541 OMP_CLAUSE_DEFAULTMAP_TOFROM
= 4 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
542 OMP_CLAUSE_DEFAULTMAP_FIRSTPRIVATE
543 = 5 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
544 OMP_CLAUSE_DEFAULTMAP_NONE
= 6 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
545 OMP_CLAUSE_DEFAULTMAP_DEFAULT
546 = 7 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1),
547 OMP_CLAUSE_DEFAULTMAP_MASK
= 7 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK
+ 1)
550 enum omp_clause_bind_kind
{
551 OMP_CLAUSE_BIND_TEAMS
,
552 OMP_CLAUSE_BIND_PARALLEL
,
553 OMP_CLAUSE_BIND_THREAD
556 /* memory-order-clause on OpenMP atomic/flush constructs or
557 argument of atomic_default_mem_order clause. */
558 enum omp_memory_order
{
559 OMP_MEMORY_ORDER_UNSPECIFIED
,
560 OMP_MEMORY_ORDER_RELAXED
,
561 OMP_MEMORY_ORDER_ACQUIRE
,
562 OMP_MEMORY_ORDER_RELEASE
,
563 OMP_MEMORY_ORDER_ACQ_REL
,
564 OMP_MEMORY_ORDER_SEQ_CST
567 /* There is a TYPE_QUAL value for each type qualifier. They can be
568 combined by bitwise-or to form the complete set of qualifiers for a
571 TYPE_UNQUALIFIED
= 0x0,
572 TYPE_QUAL_CONST
= 0x1,
573 TYPE_QUAL_VOLATILE
= 0x2,
574 TYPE_QUAL_RESTRICT
= 0x4,
575 TYPE_QUAL_ATOMIC
= 0x8
578 /* Standard named or nameless data types of the C compiler. */
609 TI_INTEGER_MINUS_ONE
,
630 /* The _FloatN and _FloatNx types must be consecutive, and in the
631 same sequence as the corresponding complex types, which must also
632 be consecutive; _FloatN must come before _FloatNx; the order must
633 also be the same as in the floatn_nx_types array and the RID_*
634 values in c-common.h. This is so that iterations over these
635 types work as intended. */
637 TI_FLOATN_TYPE_FIRST
= TI_FLOAT16_TYPE
,
638 TI_FLOATN_NX_TYPE_FIRST
= TI_FLOAT16_TYPE
,
642 TI_FLOATN_TYPE_LAST
= TI_FLOAT128_TYPE
,
643 #define NUM_FLOATN_TYPES (TI_FLOATN_TYPE_LAST - TI_FLOATN_TYPE_FIRST + 1)
645 TI_FLOATNX_TYPE_FIRST
= TI_FLOAT32X_TYPE
,
648 TI_FLOATNX_TYPE_LAST
= TI_FLOAT128X_TYPE
,
649 TI_FLOATN_NX_TYPE_LAST
= TI_FLOAT128X_TYPE
,
650 #define NUM_FLOATNX_TYPES (TI_FLOATNX_TYPE_LAST - TI_FLOATNX_TYPE_FIRST + 1)
651 #define NUM_FLOATN_NX_TYPES (TI_FLOATN_NX_TYPE_LAST \
652 - TI_FLOATN_NX_TYPE_FIRST \
655 /* Put the complex types after their component types, so that in (sequential)
656 tree streaming we can assert that their component types have already been
657 handled (see tree-streamer.c:record_common_node). */
658 TI_COMPLEX_INTEGER_TYPE
,
659 TI_COMPLEX_FLOAT_TYPE
,
660 TI_COMPLEX_DOUBLE_TYPE
,
661 TI_COMPLEX_LONG_DOUBLE_TYPE
,
663 TI_COMPLEX_FLOAT16_TYPE
,
664 TI_COMPLEX_FLOATN_NX_TYPE_FIRST
= TI_COMPLEX_FLOAT16_TYPE
,
665 TI_COMPLEX_FLOAT32_TYPE
,
666 TI_COMPLEX_FLOAT64_TYPE
,
667 TI_COMPLEX_FLOAT128_TYPE
,
668 TI_COMPLEX_FLOAT32X_TYPE
,
669 TI_COMPLEX_FLOAT64X_TYPE
,
670 TI_COMPLEX_FLOAT128X_TYPE
,
674 TI_LONG_DOUBLE_PTR_TYPE
,
684 TI_VA_LIST_GPR_COUNTER_FIELD
,
685 TI_VA_LIST_FPR_COUNTER_FIELD
,
688 TI_CONST_TM_PTR_TYPE
,
690 TI_CONST_FENV_T_PTR_TYPE
,
691 TI_FEXCEPT_T_PTR_TYPE
,
692 TI_CONST_FEXCEPT_T_PTR_TYPE
,
693 TI_POINTER_SIZED_TYPE
,
710 TI_SAT_ULLFRACT_TYPE
,
726 TI_SAT_ULLACCUM_TYPE
,
772 TI_OPTIMIZATION_DEFAULT
,
773 TI_OPTIMIZATION_CURRENT
,
774 TI_TARGET_OPTION_DEFAULT
,
775 TI_TARGET_OPTION_CURRENT
,
776 TI_CURRENT_TARGET_PRAGMA
,
777 TI_CURRENT_OPTIMIZE_PRAGMA
,
785 /* An enumeration of the standard C integer types. These must be
786 ordered so that shorter types appear before longer ones, and so
787 that signed types appear before unsigned ones, for the correct
788 functioning of interpret_integer() in c-lex.c. */
789 enum integer_type_kind
{
800 itk_unsigned_long_long
,
814 /* A pointer-to-function member type looks like:
821 If __pfn is NULL, it is a NULL pointer-to-member-function.
823 (Because the vtable is always the first thing in the object, we
824 don't need its offset.) If the function is virtual, then PFN is
825 one plus twice the index into the vtable; otherwise, it is just a
826 pointer to the function.
828 Unfortunately, using the lowest bit of PFN doesn't work in
829 architectures that don't impose alignment requirements on function
830 addresses, or that use the lowest bit to tell one ISA from another,
831 for example. For such architectures, we use the lowest bit of
832 DELTA instead of the lowest bit of the PFN, and DELTA will be
834 enum ptrmemfunc_vbit_where_t
{
835 ptrmemfunc_vbit_in_pfn
,
836 ptrmemfunc_vbit_in_delta
839 /* Flags that may be passed in the third argument of decl_attributes, and
840 to handler functions for attributes. */
841 enum attribute_flags
{
842 /* The type passed in is the type of a DECL, and any attributes that
843 should be passed in again to be applied to the DECL rather than the
844 type should be returned. */
845 ATTR_FLAG_DECL_NEXT
= 1,
846 /* The type passed in is a function return type, and any attributes that
847 should be passed in again to be applied to the function type rather
848 than the return type should be returned. */
849 ATTR_FLAG_FUNCTION_NEXT
= 2,
850 /* The type passed in is an array element type, and any attributes that
851 should be passed in again to be applied to the array type rather
852 than the element type should be returned. */
853 ATTR_FLAG_ARRAY_NEXT
= 4,
854 /* The type passed in is a structure, union or enumeration type being
855 created, and should be modified in place. */
856 ATTR_FLAG_TYPE_IN_PLACE
= 8,
857 /* The attributes are being applied by default to a library function whose
858 name indicates known behavior, and should be silently ignored if they
859 are not in fact compatible with the function type. */
860 ATTR_FLAG_BUILT_IN
= 16,
861 /* A given attribute has been parsed as a C++-11 attribute. */
865 /* Types used to represent sizes. */
866 enum size_type_kind
{
867 stk_sizetype
, /* Normal representation of sizes in bytes. */
868 stk_ssizetype
, /* Signed representation of sizes in bytes. */
869 stk_bitsizetype
, /* Normal representation of sizes in bits. */
870 stk_sbitsizetype
, /* Signed representation of sizes in bits. */
874 enum operand_equal_flag
{
877 OEP_MATCH_SIDE_EFFECTS
= 4,
879 /* Internal within operand_equal_p: */
880 OEP_NO_HASH_CHECK
= 16,
881 /* Internal within inchash::add_expr: */
883 /* Makes operand_equal_p handle more expressions: */
884 OEP_LEXICOGRAPHIC
= 64,
888 /* Enum and arrays used for tree allocation stats.
889 Keep in sync with tree.c:tree_node_kind_names. */
890 enum tree_node_kind
{
910 enum annot_expr_kind
{
911 annot_expr_ivdep_kind
,
912 annot_expr_unroll_kind
,
913 annot_expr_no_vector_kind
,
914 annot_expr_vector_kind
,
915 annot_expr_parallel_kind
,
919 /*---------------------------------------------------------------------------
921 ---------------------------------------------------------------------------*/
922 /* When processing aliases at the symbol table level, we need the
923 declaration of target. For this reason we need to queue aliases and
924 process them after all declarations has been produced. */
925 struct GTY(()) alias_pair
{
930 /* An initialization priority. */
931 typedef unsigned short priority_type
;
933 /* The type of a callback function for walking over tree structure. */
934 typedef tree (*walk_tree_fn
) (tree
*, int *, void *);
936 /* The type of a callback function that represents a custom walk_tree. */
937 typedef tree (*walk_tree_lh
) (tree
*, int *, tree (*) (tree
*, int *, void *),
938 void *, hash_set
<tree
> *);
941 /*---------------------------------------------------------------------------
943 ---------------------------------------------------------------------------*/
944 /* A tree node can represent a data type, a variable, an expression
945 or a statement. Each node has a TREE_CODE which says what kind of
946 thing it represents. Some common codes are:
947 INTEGER_TYPE -- represents a type of integers.
948 ARRAY_TYPE -- represents a type of pointer.
949 VAR_DECL -- represents a declared variable.
950 INTEGER_CST -- represents a constant integer value.
951 PLUS_EXPR -- represents a sum (an expression).
953 As for the contents of a tree node: there are some fields
954 that all nodes share. Each TREE_CODE has various special-purpose
955 fields as well. The fields of a node are never accessed directly,
956 always through accessor macros. */
958 /* Every kind of tree node starts with this structure,
959 so all nodes have these fields.
961 See the accessor macros, defined below, for documentation of the
962 fields, and the table below which connects the fields and the
965 struct GTY(()) tree_base
{
966 ENUM_BITFIELD(tree_code
) code
: 16;
968 unsigned side_effects_flag
: 1;
969 unsigned constant_flag
: 1;
970 unsigned addressable_flag
: 1;
971 unsigned volatile_flag
: 1;
972 unsigned readonly_flag
: 1;
973 unsigned asm_written_flag
: 1;
974 unsigned nowarning_flag
: 1;
975 unsigned visited
: 1;
977 unsigned used_flag
: 1;
978 unsigned nothrow_flag
: 1;
979 unsigned static_flag
: 1;
980 unsigned public_flag
: 1;
981 unsigned private_flag
: 1;
982 unsigned protected_flag
: 1;
983 unsigned deprecated_flag
: 1;
984 unsigned default_def_flag
: 1;
987 /* The bits in the following structure should only be used with
988 accessor macros that constrain inputs with tree checking. */
990 unsigned lang_flag_0
: 1;
991 unsigned lang_flag_1
: 1;
992 unsigned lang_flag_2
: 1;
993 unsigned lang_flag_3
: 1;
994 unsigned lang_flag_4
: 1;
995 unsigned lang_flag_5
: 1;
996 unsigned lang_flag_6
: 1;
997 unsigned saturating_flag
: 1;
999 unsigned unsigned_flag
: 1;
1000 unsigned packed_flag
: 1;
1001 unsigned user_align
: 1;
1002 unsigned nameless_flag
: 1;
1003 unsigned atomic_flag
: 1;
1004 unsigned spare0
: 3;
1006 unsigned spare1
: 8;
1008 /* This field is only used with TREE_TYPE nodes; the only reason it is
1009 present in tree_base instead of tree_type is to save space. The size
1010 of the field must be large enough to hold addr_space_t values. */
1011 unsigned address_space
: 8;
1014 /* The following fields are present in tree_base to save space. The
1015 nodes using them do not require any of the flags above and so can
1016 make better use of the 4-byte sized word. */
1018 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
1020 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
1021 its native precision. */
1022 unsigned char unextended
;
1024 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
1025 wider precisions based on its TYPE_SIGN. */
1026 unsigned char extended
;
1028 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
1029 offset_int precision, with smaller integers being extended
1030 according to their TYPE_SIGN. This is equal to one of the two
1031 fields above but is cached for speed. */
1032 unsigned char offset
;
1035 /* VEC length. This field is only used with TREE_VEC. */
1038 /* This field is only used with VECTOR_CST. */
1040 /* The value of VECTOR_CST_LOG2_NPATTERNS. */
1041 unsigned int log2_npatterns
: 8;
1043 /* The value of VECTOR_CST_NELTS_PER_PATTERN. */
1044 unsigned int nelts_per_pattern
: 8;
1046 /* For future expansion. */
1047 unsigned int unused
: 16;
1050 /* SSA version number. This field is only used with SSA_NAME. */
1051 unsigned int version
;
1053 /* CHREC_VARIABLE. This field is only used with POLYNOMIAL_CHREC. */
1054 unsigned int chrec_var
;
1056 /* Internal function code. */
1057 enum internal_fn ifn
;
1059 /* OMP_ATOMIC* memory order. */
1060 enum omp_memory_order omp_atomic_memory_order
;
1062 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
1063 expression trees and specify known data non-dependences. For
1064 two memory references in a function they are known to not
1065 alias if dependence_info.clique are equal and dependence_info.base
1066 are distinct. Clique number zero means there is no information,
1067 clique number one is populated from function global information
1068 and thus needs no remapping on transforms like loop unrolling. */
1070 unsigned short clique
;
1071 unsigned short base
;
1073 } GTY((skip(""))) u
;
1076 /* The following table lists the uses of each of the above flags and
1077 for which types of nodes they are defined.
1082 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
1085 CONSTRUCTOR, IDENTIFIER_NODE
1088 CALL_EXPR_TAILCALL in
1094 PREDICT_EXPR_OUTCOME in
1100 VAR_DECL, FUNCTION_DECL
1103 TREE_NO_TRAMPOLINE in
1109 TREE_SYMBOL_REFERENCED in
1113 TARGET_EXPR, WITH_CLEANUP_EXPR
1115 TRY_CATCH_IS_CLEANUP in
1121 TYPE_REF_CAN_ALIAS_ALL in
1122 POINTER_TYPE, REFERENCE_TYPE
1130 TRANSACTION_EXPR_OUTER in
1133 SSA_NAME_ANTI_RANGE_P in
1142 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
1145 VAR_DECL, FUNCTION_DECL
1148 CONSTRUCTOR_NO_CLEARING in
1154 CALL_EXPR_VA_ARG_PACK in
1157 TYPE_CACHED_VALUES_P in
1160 SAVE_EXPR_RESOLVED_P in
1163 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
1164 OMP_CLAUSE_LASTPRIVATE
1166 OMP_CLAUSE_PRIVATE_DEBUG in
1169 OMP_CLAUSE_LINEAR_NO_COPYIN in
1172 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1175 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1176 OMP_CLAUSE_{,TASK_,IN_}REDUCTION
1178 OMP_CLAUSE_USE_DEVICE_PTR_IF_PRESENT in
1179 OMP_CLAUSE_USE_DEVICE_PTR
1181 TRANSACTION_EXPR_RELAXED in
1184 FALLTHROUGH_LABEL_P in
1187 SSA_NAME_IS_VIRTUAL_OPERAND in
1190 EXPR_LOCATION_WRAPPER_P in
1191 NON_LVALUE_EXPR, VIEW_CONVERT_EXPR
1198 CALL_EXPR_RETURN_SLOT_OPT in
1204 OMP_PARALLEL_COMBINED in
1207 OMP_CLAUSE_PRIVATE_OUTER_REF in
1210 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1213 TYPE_REF_IS_RVALUE in
1225 CALL_FROM_THUNK_P and
1226 CALL_ALLOCA_FOR_VAR_P and
1227 CALL_FROM_NEW_OR_DELETE_P in
1230 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1238 TREE_SIDE_EFFECTS in
1248 TREE_THIS_VOLATILE in
1271 TYPE_SIZES_GIMPLIFIED in
1285 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1286 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1289 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1306 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1308 SSA_NAME_IN_FREE_LIST in
1320 IDENTIFIER_TRANSPARENT_ALIAS in
1323 SSA_NAME_POINTS_TO_READONLY_MEMORY in
1329 all trees (used liberally by many passes)
1333 TYPE_REVERSE_STORAGE_ORDER in
1334 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1339 VAR_DECL_IS_VIRTUAL_OPERAND in
1354 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1356 TYPE_VECTOR_OPAQUE in
1359 SSA_NAME_IS_DEFAULT_DEF in
1362 DECL_NONLOCAL_FRAME in
1365 REF_REVERSE_STORAGE_ORDER in
1366 BIT_FIELD_REF, MEM_REF
1368 FUNC_ADDR_BY_DESCRIPTOR in
1371 CALL_EXPR_BY_DESCRIPTOR in
1375 struct GTY(()) tree_typed
{
1376 struct tree_base base
;
1380 struct GTY(()) tree_common
{
1381 struct tree_typed typed
;
1385 struct GTY(()) tree_int_cst
{
1386 struct tree_typed typed
;
1387 HOST_WIDE_INT val
[1];
1391 struct GTY(()) tree_real_cst
{
1392 struct tree_typed typed
;
1393 struct real_value
* real_cst_ptr
;
1396 struct GTY(()) tree_fixed_cst
{
1397 struct tree_typed typed
;
1398 struct fixed_value
* fixed_cst_ptr
;
1401 struct GTY(()) tree_string
{
1402 struct tree_typed typed
;
1407 struct GTY(()) tree_complex
{
1408 struct tree_typed typed
;
1413 struct GTY(()) tree_vector
{
1414 struct tree_typed typed
;
1415 tree
GTY ((length ("vector_cst_encoded_nelts ((tree) &%h)"))) elts
[1];
1418 struct GTY(()) tree_poly_int_cst
{
1419 struct tree_typed typed
;
1420 tree coeffs
[NUM_POLY_INT_COEFFS
];
1423 struct GTY(()) tree_identifier
{
1424 struct tree_common common
;
1425 struct ht_identifier id
;
1428 struct GTY(()) tree_list
{
1429 struct tree_common common
;
1434 struct GTY(()) tree_vec
{
1435 struct tree_common common
;
1436 tree
GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a
[1];
1439 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1440 element. INDEX can optionally design the position of VALUE: in arrays,
1441 it is the index where VALUE has to be placed; in structures, it is the
1442 FIELD_DECL of the member. */
1443 struct GTY(()) constructor_elt
{
1448 struct GTY(()) tree_constructor
{
1449 struct tree_typed typed
;
1450 vec
<constructor_elt
, va_gc
> *elts
;
1453 enum omp_clause_depend_kind
1455 OMP_CLAUSE_DEPEND_IN
,
1456 OMP_CLAUSE_DEPEND_OUT
,
1457 OMP_CLAUSE_DEPEND_INOUT
,
1458 OMP_CLAUSE_DEPEND_MUTEXINOUTSET
,
1459 OMP_CLAUSE_DEPEND_SOURCE
,
1460 OMP_CLAUSE_DEPEND_SINK
,
1461 OMP_CLAUSE_DEPEND_DEPOBJ
,
1462 OMP_CLAUSE_DEPEND_LAST
1465 enum omp_clause_proc_bind_kind
1467 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1468 OMP_CLAUSE_PROC_BIND_FALSE
= 0,
1469 OMP_CLAUSE_PROC_BIND_TRUE
= 1,
1470 OMP_CLAUSE_PROC_BIND_MASTER
= 2,
1471 OMP_CLAUSE_PROC_BIND_CLOSE
= 3,
1472 OMP_CLAUSE_PROC_BIND_SPREAD
= 4,
1473 OMP_CLAUSE_PROC_BIND_LAST
1476 enum omp_clause_device_type_kind
1478 OMP_CLAUSE_DEVICE_TYPE_HOST
= 1,
1479 OMP_CLAUSE_DEVICE_TYPE_NOHOST
= 2,
1480 OMP_CLAUSE_DEVICE_TYPE_ANY
= 3
1483 enum omp_clause_linear_kind
1485 OMP_CLAUSE_LINEAR_DEFAULT
,
1486 OMP_CLAUSE_LINEAR_REF
,
1487 OMP_CLAUSE_LINEAR_VAL
,
1488 OMP_CLAUSE_LINEAR_UVAL
1491 struct GTY(()) tree_exp
{
1492 struct tree_typed typed
;
1494 tree
GTY ((special ("tree_exp"),
1495 desc ("TREE_CODE ((tree) &%0)")))
1499 /* Immediate use linking structure. This structure is used for maintaining
1500 a doubly linked list of uses of an SSA_NAME. */
1501 struct GTY(()) ssa_use_operand_t
{
1502 struct ssa_use_operand_t
* GTY((skip(""))) prev
;
1503 struct ssa_use_operand_t
* GTY((skip(""))) next
;
1504 /* Immediate uses for a given SSA name are maintained as a cyclic
1505 list. To recognize the root of this list, the location field
1506 needs to point to the original SSA name. Since statements and
1507 SSA names are of different data types, we need this union. See
1508 the explanation in struct imm_use_iterator. */
1509 union { gimple
*stmt
; tree ssa_name
; } GTY((skip(""))) loc
;
1510 tree
*GTY((skip(""))) use
;
1513 struct GTY(()) tree_ssa_name
{
1514 struct tree_typed typed
;
1516 /* _DECL wrapped by this SSA name. */
1519 /* Statement that defines this SSA name. */
1522 /* Value range information. */
1523 union ssa_name_info_type
{
1524 /* Pointer attributes used for alias analysis. */
1525 struct GTY ((tag ("0"))) ptr_info_def
*ptr_info
;
1526 /* Value range attributes used for zero/sign extension elimination. */
1527 struct GTY ((tag ("1"))) range_info_def
*range_info
;
1528 } GTY ((desc ("%1.typed.type ?" \
1529 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info
;
1531 /* Immediate uses list for this SSA_NAME. */
1532 struct ssa_use_operand_t imm_uses
;
1535 struct GTY(()) phi_arg_d
{
1536 /* imm_use MUST be the first element in struct because we do some
1537 pointer arithmetic with it. See phi_arg_index_from_use. */
1538 struct ssa_use_operand_t imm_use
;
1543 struct GTY(()) tree_omp_clause
{
1544 struct tree_common common
;
1546 enum omp_clause_code code
;
1547 union omp_clause_subcode
{
1548 enum omp_clause_default_kind default_kind
;
1549 enum omp_clause_schedule_kind schedule_kind
;
1550 enum omp_clause_depend_kind depend_kind
;
1551 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1552 unsigned int map_kind
;
1553 enum omp_clause_proc_bind_kind proc_bind_kind
;
1554 enum tree_code reduction_code
;
1555 enum omp_clause_linear_kind linear_kind
;
1556 enum tree_code if_modifier
;
1557 enum omp_clause_defaultmap_kind defaultmap_kind
;
1558 enum omp_clause_bind_kind bind_kind
;
1559 enum omp_clause_device_type_kind device_type_kind
;
1560 } GTY ((skip
)) subcode
;
1562 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1564 gimple_seq gimple_reduction_init
;
1565 gimple_seq gimple_reduction_merge
;
1567 tree
GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1571 struct GTY(()) tree_block
{
1572 struct tree_base base
;
1578 location_t end_locus
;
1581 vec
<tree
, va_gc
> *nonlocalized_vars
;
1585 tree abstract_origin
;
1586 tree fragment_origin
;
1587 tree fragment_chain
;
1589 /* Pointer to the DWARF lexical block. */
1590 struct die_struct
*die
;
1593 struct GTY(()) tree_type_common
{
1594 struct tree_common common
;
1600 unsigned int precision
: 10;
1601 unsigned no_force_blk_flag
: 1;
1602 unsigned needs_constructing_flag
: 1;
1603 unsigned transparent_aggr_flag
: 1;
1604 unsigned restrict_flag
: 1;
1605 unsigned contains_placeholder_bits
: 2;
1607 ENUM_BITFIELD(machine_mode
) mode
: 8;
1609 /* TYPE_STRING_FLAG for INTEGER_TYPE and ARRAY_TYPE.
1610 TYPE_CXX_ODR_P for RECORD_TYPE and UNION_TYPE. */
1611 unsigned string_flag
: 1;
1612 unsigned lang_flag_0
: 1;
1613 unsigned lang_flag_1
: 1;
1614 unsigned lang_flag_2
: 1;
1615 unsigned lang_flag_3
: 1;
1616 unsigned lang_flag_4
: 1;
1617 unsigned lang_flag_5
: 1;
1618 unsigned lang_flag_6
: 1;
1619 unsigned lang_flag_7
: 1;
1621 /* TYPE_ALIGN in log2; this has to be large enough to hold values
1622 of the maximum of BIGGEST_ALIGNMENT and MAX_OFILE_ALIGNMENT,
1623 the latter being usually the larger. For ELF it is 8<<28,
1624 so we need to store the value 32 (not 31, as we need the zero
1625 as well), hence six bits. */
1627 unsigned warn_if_not_align
: 6;
1628 unsigned typeless_storage
: 1;
1629 unsigned empty_flag
: 1;
1630 unsigned indivisible_p
: 1;
1631 unsigned spare
: 16;
1633 alias_set_type alias_set
;
1636 union tree_type_symtab
{
1637 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address
;
1638 struct die_struct
* GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die
;
1639 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab
;
1647 struct GTY(()) tree_type_with_lang_specific
{
1648 struct tree_type_common common
;
1649 /* Points to a structure whose details depend on the language in use. */
1650 struct lang_type
*lang_specific
;
1653 struct GTY(()) tree_type_non_common
{
1654 struct tree_type_with_lang_specific with_lang_specific
;
1661 struct GTY (()) tree_binfo
{
1662 struct tree_common common
;
1668 vec
<tree
, va_gc
> *base_accesses
;
1674 vec
<tree
, va_gc
> base_binfos
;
1677 struct GTY(()) tree_decl_minimal
{
1678 struct tree_common common
;
1685 struct GTY(()) tree_decl_common
{
1686 struct tree_decl_minimal common
;
1689 ENUM_BITFIELD(machine_mode
) mode
: 8;
1691 unsigned nonlocal_flag
: 1;
1692 unsigned virtual_flag
: 1;
1693 unsigned ignored_flag
: 1;
1694 unsigned abstract_flag
: 1;
1695 unsigned artificial_flag
: 1;
1696 unsigned preserve_flag
: 1;
1697 unsigned debug_expr_is_from
: 1;
1699 unsigned lang_flag_0
: 1;
1700 unsigned lang_flag_1
: 1;
1701 unsigned lang_flag_2
: 1;
1702 unsigned lang_flag_3
: 1;
1703 unsigned lang_flag_4
: 1;
1704 unsigned lang_flag_5
: 1;
1705 unsigned lang_flag_6
: 1;
1706 unsigned lang_flag_7
: 1;
1707 unsigned lang_flag_8
: 1;
1709 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER
1710 In TRANSLATION_UNIT_DECL, this is TRANSLATION_UNIT_WARN_EMPTY_P.
1711 In FIELD_DECL, this is DECL_FIELD_ABI_IGNORED. */
1712 unsigned decl_flag_0
: 1;
1713 /* In FIELD_DECL, this is DECL_BIT_FIELD
1714 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1715 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1716 unsigned decl_flag_1
: 1;
1717 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1718 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1719 DECL_HAS_VALUE_EXPR_P. */
1720 unsigned decl_flag_2
: 1;
1721 /* In FIELD_DECL, this is DECL_PADDING_P. */
1722 unsigned decl_flag_3
: 1;
1723 /* Logically, these two would go in a theoretical base shared by var and
1725 unsigned not_gimple_reg_flag
: 1;
1726 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1727 unsigned decl_by_reference_flag
: 1;
1728 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1729 unsigned decl_read_flag
: 1;
1730 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1731 /* In a PARM_DECL, this is DECL_HIDDEN_STRING_LENGTH. */
1732 unsigned decl_nonshareable_flag
: 1;
1734 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1735 unsigned int off_align
: 6;
1737 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1738 unsigned int align
: 6;
1740 /* DECL_WARN_IF_NOT_ALIGN. It should have the same size as
1741 TYPE_WARN_IF_NOT_ALIGN. */
1742 unsigned int warn_if_not_align
: 6;
1744 /* 14 bits unused. */
1746 /* UID for points-to sets, stable over copying from inlining. */
1747 unsigned int pt_uid
;
1752 tree abstract_origin
;
1754 /* Points to a structure whose details depend on the language in use. */
1755 struct lang_decl
*lang_specific
;
1758 struct GTY(()) tree_decl_with_rtl
{
1759 struct tree_decl_common common
;
1763 struct GTY(()) tree_field_decl
{
1764 struct tree_decl_common common
;
1767 tree bit_field_type
;
1773 struct GTY(()) tree_label_decl
{
1774 struct tree_decl_with_rtl common
;
1776 int eh_landing_pad_nr
;
1779 struct GTY(()) tree_result_decl
{
1780 struct tree_decl_with_rtl common
;
1783 struct GTY(()) tree_const_decl
{
1784 struct tree_decl_common common
;
1787 struct GTY(()) tree_parm_decl
{
1788 struct tree_decl_with_rtl common
;
1792 struct GTY(()) tree_decl_with_vis
{
1793 struct tree_decl_with_rtl common
;
1794 tree assembler_name
;
1795 struct symtab_node
*symtab_node
;
1797 /* Belong to VAR_DECL exclusively. */
1798 unsigned defer_output
: 1;
1799 unsigned hard_register
: 1;
1800 unsigned common_flag
: 1;
1801 unsigned in_text_section
: 1;
1802 unsigned in_constant_pool
: 1;
1803 unsigned dllimport_flag
: 1;
1804 /* Don't belong to VAR_DECL exclusively. */
1805 unsigned weak_flag
: 1;
1807 unsigned seen_in_bind_expr
: 1;
1808 unsigned comdat_flag
: 1;
1809 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1810 ENUM_BITFIELD(symbol_visibility
) visibility
: 2;
1811 unsigned visibility_specified
: 1;
1813 /* Belong to FUNCTION_DECL exclusively. */
1814 unsigned init_priority_p
: 1;
1815 /* Used by C++ only. Might become a generic decl flag. */
1816 unsigned shadowed_for_var_p
: 1;
1817 /* Belong to FUNCTION_DECL exclusively. */
1818 unsigned cxx_constructor
: 1;
1819 /* Belong to FUNCTION_DECL exclusively. */
1820 unsigned cxx_destructor
: 1;
1821 /* Belong to FUNCTION_DECL exclusively. */
1823 /* Belong to FUNCTION_DECL exclusively. */
1824 unsigned regdecl_flag
: 1;
1825 /* 14 unused bits. */
1826 /* 32 more unused on 64 bit HW. */
1829 struct GTY(()) tree_var_decl
{
1830 struct tree_decl_with_vis common
;
1833 struct GTY(()) tree_decl_non_common
{
1834 struct tree_decl_with_vis common
;
1835 /* Almost all FE's use this. */
1839 /* Classify a special function declaration type. */
1841 enum function_decl_type
1851 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1852 arguments/result/saved_tree fields by front ends. It was either inherit
1853 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1854 which seemed a bit strange. */
1856 struct GTY(()) tree_function_decl
{
1857 struct tree_decl_non_common common
;
1861 /* Arguments of the function. */
1863 /* The personality function. Used for stack unwinding. */
1866 /* Function specific options that are used by this function. */
1867 tree function_specific_target
; /* target options */
1868 tree function_specific_optimization
; /* optimization options */
1870 /* Generic function body. */
1872 /* Index within a virtual table. */
1875 /* In a FUNCTION_DECL this is DECL_UNCHECKED_FUNCTION_CODE. */
1876 unsigned int function_code
;
1878 ENUM_BITFIELD(built_in_class
) built_in_class
: 2;
1879 unsigned static_ctor_flag
: 1;
1880 unsigned static_dtor_flag
: 1;
1881 unsigned uninlinable
: 1;
1882 unsigned possibly_inlined
: 1;
1883 unsigned novops_flag
: 1;
1884 unsigned returns_twice_flag
: 1;
1886 unsigned malloc_flag
: 1;
1887 unsigned declared_inline_flag
: 1;
1888 unsigned no_inline_warning_flag
: 1;
1889 unsigned no_instrument_function_entry_exit
: 1;
1890 unsigned no_limit_stack
: 1;
1891 unsigned disregard_inline_limits
: 1;
1892 unsigned pure_flag
: 1;
1893 unsigned looping_const_or_pure_flag
: 1;
1895 /* Align the bitfield to boundary of a byte. */
1896 ENUM_BITFIELD(function_decl_type
) decl_type
: 2;
1897 unsigned has_debug_args_flag
: 1;
1898 unsigned versioned_function
: 1;
1899 unsigned replaceable_operator
: 1;
1901 /* 11 bits left for future expansion. */
1902 /* 32 bits on 64-bit HW. */
1905 struct GTY(()) tree_translation_unit_decl
{
1906 struct tree_decl_common common
;
1907 /* Source language of this translation unit. Used for DWARF output. */
1908 const char * GTY((skip(""))) language
;
1909 /* TODO: Non-optimization used to build this translation unit. */
1910 /* TODO: Root of a partial DWARF tree for global types and decls. */
1913 struct GTY(()) tree_type_decl
{
1914 struct tree_decl_non_common common
;
1918 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1920 struct tree_statement_list_node
*prev
;
1921 struct tree_statement_list_node
*next
;
1925 struct GTY(()) tree_statement_list
1927 struct tree_typed typed
;
1928 struct tree_statement_list_node
*head
;
1929 struct tree_statement_list_node
*tail
;
1933 /* Optimization options used by a function. */
1935 struct GTY(()) tree_optimization_option
{
1936 struct tree_base base
;
1938 /* The optimization options used by the user. */
1939 struct cl_optimization
*opts
;
1941 /* Target optabs for this set of optimization options. This is of
1942 type `struct target_optabs *'. */
1943 void *GTY ((atomic
)) optabs
;
1945 /* The value of this_target_optabs against which the optabs above were
1947 struct target_optabs
*GTY ((skip
)) base_optabs
;
1950 /* Forward declaration, defined in target-globals.h. */
1952 class GTY(()) target_globals
;
1954 /* Target options used by a function. */
1956 struct GTY(()) tree_target_option
{
1957 struct tree_base base
;
1959 /* Target globals for the corresponding target option. */
1960 class target_globals
*globals
;
1962 /* The optimization options used by the user. */
1963 struct cl_target_option
*opts
;
1966 /* Define the overall contents of a tree node.
1967 It may be any of the structures declared above
1968 for various types of node. */
1969 union GTY ((ptr_alias (union lang_tree_node
),
1970 desc ("tree_node_structure (&%h)"), variable_size
)) tree_node
{
1971 struct tree_base
GTY ((tag ("TS_BASE"))) base
;
1972 struct tree_typed
GTY ((tag ("TS_TYPED"))) typed
;
1973 struct tree_common
GTY ((tag ("TS_COMMON"))) common
;
1974 struct tree_int_cst
GTY ((tag ("TS_INT_CST"))) int_cst
;
1975 struct tree_poly_int_cst
GTY ((tag ("TS_POLY_INT_CST"))) poly_int_cst
;
1976 struct tree_real_cst
GTY ((tag ("TS_REAL_CST"))) real_cst
;
1977 struct tree_fixed_cst
GTY ((tag ("TS_FIXED_CST"))) fixed_cst
;
1978 struct tree_vector
GTY ((tag ("TS_VECTOR"))) vector
;
1979 struct tree_string
GTY ((tag ("TS_STRING"))) string
;
1980 struct tree_complex
GTY ((tag ("TS_COMPLEX"))) complex;
1981 struct tree_identifier
GTY ((tag ("TS_IDENTIFIER"))) identifier
;
1982 struct tree_decl_minimal
GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal
;
1983 struct tree_decl_common
GTY ((tag ("TS_DECL_COMMON"))) decl_common
;
1984 struct tree_decl_with_rtl
GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl
;
1985 struct tree_decl_non_common
GTY ((tag ("TS_DECL_NON_COMMON")))
1987 struct tree_parm_decl
GTY ((tag ("TS_PARM_DECL"))) parm_decl
;
1988 struct tree_decl_with_vis
GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis
;
1989 struct tree_var_decl
GTY ((tag ("TS_VAR_DECL"))) var_decl
;
1990 struct tree_field_decl
GTY ((tag ("TS_FIELD_DECL"))) field_decl
;
1991 struct tree_label_decl
GTY ((tag ("TS_LABEL_DECL"))) label_decl
;
1992 struct tree_result_decl
GTY ((tag ("TS_RESULT_DECL"))) result_decl
;
1993 struct tree_const_decl
GTY ((tag ("TS_CONST_DECL"))) const_decl
;
1994 struct tree_type_decl
GTY ((tag ("TS_TYPE_DECL"))) type_decl
;
1995 struct tree_function_decl
GTY ((tag ("TS_FUNCTION_DECL"))) function_decl
;
1996 struct tree_translation_unit_decl
GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1997 translation_unit_decl
;
1998 struct tree_type_common
GTY ((tag ("TS_TYPE_COMMON"))) type_common
;
1999 struct tree_type_with_lang_specific
GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
2000 type_with_lang_specific
;
2001 struct tree_type_non_common
GTY ((tag ("TS_TYPE_NON_COMMON")))
2003 struct tree_list
GTY ((tag ("TS_LIST"))) list
;
2004 struct tree_vec
GTY ((tag ("TS_VEC"))) vec
;
2005 struct tree_exp
GTY ((tag ("TS_EXP"))) exp
;
2006 struct tree_ssa_name
GTY ((tag ("TS_SSA_NAME"))) ssa_name
;
2007 struct tree_block
GTY ((tag ("TS_BLOCK"))) block
;
2008 struct tree_binfo
GTY ((tag ("TS_BINFO"))) binfo
;
2009 struct tree_statement_list
GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list
;
2010 struct tree_constructor
GTY ((tag ("TS_CONSTRUCTOR"))) constructor
;
2011 struct tree_omp_clause
GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause
;
2012 struct tree_optimization_option
GTY ((tag ("TS_OPTIMIZATION"))) optimization
;
2013 struct tree_target_option
GTY ((tag ("TS_TARGET_OPTION"))) target_option
;
2016 /* Structure describing an attribute and a function to handle it. */
2017 struct attribute_spec
{
2018 /* The name of the attribute (without any leading or trailing __),
2019 or NULL to mark the end of a table of attributes. */
2021 /* The minimum length of the list of arguments of the attribute. */
2023 /* The maximum length of the list of arguments of the attribute
2024 (-1 for no maximum). */
2026 /* Whether this attribute requires a DECL. If it does, it will be passed
2027 from types of DECLs, function return types and array element types to
2028 the DECLs, function types and array types respectively; but when
2029 applied to a type in any other circumstances, it will be ignored with
2030 a warning. (If greater control is desired for a given attribute,
2031 this should be false, and the flags argument to the handler may be
2032 used to gain greater control in that case.) */
2034 /* Whether this attribute requires a type. If it does, it will be passed
2035 from a DECL to the type of that DECL. */
2037 /* Whether this attribute requires a function (or method) type. If it does,
2038 it will be passed from a function pointer type to the target type,
2039 and from a function return type (which is not itself a function
2040 pointer type) to the function type. */
2041 bool function_type_required
;
2042 /* Specifies if attribute affects type's identity. */
2043 bool affects_type_identity
;
2044 /* Function to handle this attribute. NODE points to the node to which
2045 the attribute is to be applied. If a DECL, it should be modified in
2046 place; if a TYPE, a copy should be created. NAME is the canonicalized
2047 name of the attribute i.e. without any leading or trailing underscores.
2048 ARGS is the TREE_LIST of the arguments (which may be NULL). FLAGS gives
2049 further information about the context of the attribute. Afterwards, the
2050 attributes will be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as
2051 appropriate, unless *NO_ADD_ATTRS is set to true (which should be done on
2052 error, as well as in any other cases when the attributes should not be
2053 added to the DECL or TYPE). Depending on FLAGS, any attributes to be
2054 applied to another type or DECL later may be returned;
2055 otherwise the return value should be NULL_TREE. This pointer may be
2056 NULL if no special handling is required beyond the checks implied
2057 by the rest of this structure. */
2058 tree (*handler
) (tree
*node
, tree name
, tree args
,
2059 int flags
, bool *no_add_attrs
);
2061 /* Specifies the name of an attribute that's mutually exclusive with
2062 this one, and whether the relationship applies to the function,
2063 variable, or type form of the attribute. */
2071 /* An array of attribute exclusions describing names of other attributes
2072 that this attribute is mutually exclusive with. */
2073 const exclusions
*exclude
;
2076 /* These functions allow a front-end to perform a manual layout of a
2077 RECORD_TYPE. (For instance, if the placement of subsequent fields
2078 depends on the placement of fields so far.) Begin by calling
2079 start_record_layout. Then, call place_field for each of the
2080 fields. Then, call finish_record_layout. See layout_type for the
2081 default way in which these functions are used. */
2082 typedef struct record_layout_info_s
{
2083 /* The RECORD_TYPE that we are laying out. */
2085 /* The offset into the record so far, in bytes, not including bits in
2088 /* The last known alignment of SIZE. */
2089 unsigned int offset_align
;
2090 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
2092 /* The alignment of the record so far, in bits. */
2093 unsigned int record_align
;
2094 /* The alignment of the record so far, ignoring #pragma pack and
2095 __attribute__ ((packed)), in bits. */
2096 unsigned int unpacked_align
;
2097 /* The previous field laid out. */
2099 /* The static variables (i.e., class variables, as opposed to
2100 instance variables) encountered in T. */
2101 vec
<tree
, va_gc
> *pending_statics
;
2102 /* Bits remaining in the current alignment group */
2103 int remaining_in_alignment
;
2104 /* True if we've seen a packed field that didn't have normal
2105 alignment anyway. */
2106 int packed_maybe_necessary
;
2107 } *record_layout_info
;
2109 /* Iterator for going through the function arguments. */
2110 struct function_args_iterator
{
2111 tree next
; /* TREE_LIST pointing to the next argument */
2114 /* Structures to map from a tree to another tree. */
2115 struct GTY(()) tree_map_base
{
2119 /* Map from a tree to another tree. */
2121 struct GTY((for_user
)) tree_map
{
2122 struct tree_map_base base
;
2127 /* Map from a decl tree to another tree. */
2128 struct GTY((for_user
)) tree_decl_map
{
2129 struct tree_map_base base
;
2133 /* Map from a tree to an int. */
2134 struct GTY((for_user
)) tree_int_map
{
2135 struct tree_map_base base
;
2139 /* Map from a decl tree to a tree vector. */
2140 struct GTY((for_user
)) tree_vec_map
{
2141 struct tree_map_base base
;
2142 vec
<tree
, va_gc
> *to
;
2145 /* Abstract iterators for CALL_EXPRs. These static inline definitions
2146 have to go towards the end of tree.h so that union tree_node is fully
2147 defined by this point. */
2149 /* Structure containing iterator state. */
2150 struct call_expr_arg_iterator
{
2151 tree t
; /* the call_expr */
2152 int n
; /* argument count */
2153 int i
; /* next argument index */
2156 struct const_call_expr_arg_iterator
{
2157 const_tree t
; /* the call_expr */
2158 int n
; /* argument count */
2159 int i
; /* next argument index */
2162 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
2163 function, and flags. */
2164 struct GTY(()) builtin_info_type
{
2166 /* Whether the user can use <xxx> instead of explicitly using calls
2167 to __builtin_<xxx>. */
2168 unsigned implicit_p
: 1;
2169 /* Whether the user has provided a declaration of <xxx>. */
2170 unsigned declared_p
: 1;
2173 /* Information about a _FloatN or _FloatNx type that may be
2175 struct floatn_type_info
{
2176 /* The number N in the type name. */
2178 /* Whether it is an extended type _FloatNx (true) or an interchange
2184 /*---------------------------------------------------------------------------
2186 ---------------------------------------------------------------------------*/
2187 /* Matrix describing the structures contained in a given tree code. */
2188 extern bool tree_contains_struct
[MAX_TREE_CODES
][64];
2190 /* Class of tree given its code. */
2191 extern const enum tree_code_class tree_code_type
[];
2193 /* Each tree code class has an associated string representation.
2194 These must correspond to the tree_code_class entries. */
2195 extern const char *const tree_code_class_strings
[];
2197 /* Number of argument-words in each kind of tree-node. */
2198 extern const unsigned char tree_code_length
[];
2200 /* Vector of all alias pairs for global symbols. */
2201 extern GTY(()) vec
<alias_pair
, va_gc
> *alias_pairs
;
2203 /* Names of all the built_in classes. */
2204 extern const char *const built_in_class_names
[BUILT_IN_LAST
];
2206 /* Names of all the built_in functions. */
2207 extern const char * built_in_names
[(int) END_BUILTINS
];
2209 /* Number of operands and names for each OMP_CLAUSE node. */
2210 extern unsigned const char omp_clause_num_ops
[];
2211 extern const char * const omp_clause_code_name
[];
2213 /* A vector of all translation-units. */
2214 extern GTY (()) vec
<tree
, va_gc
> *all_translation_units
;
2216 /* Vector of standard trees used by the C compiler. */
2217 extern GTY(()) tree global_trees
[TI_MAX
];
2219 /* The standard C integer types. Use integer_type_kind to index into
2221 extern GTY(()) tree integer_types
[itk_none
];
2223 /* Types used to represent sizes. */
2224 extern GTY(()) tree sizetype_tab
[(int) stk_type_kind_last
];
2226 /* Arrays for keeping track of tree node statistics. */
2227 extern uint64_t tree_node_counts
[];
2228 extern uint64_t tree_node_sizes
[];
2230 /* True if we are in gimple form and the actions of the folders need to
2231 be restricted. False if we are not in gimple form and folding is not
2232 restricted to creating gimple expressions. */
2233 extern bool in_gimple_form
;
2235 /* Functional interface to the builtin functions. */
2236 extern GTY(()) builtin_info_type builtin_info
[(int)END_BUILTINS
];
2238 /* If nonzero, an upper limit on alignment of structure fields, in bits, */
2239 extern unsigned int maximum_field_alignment
;
2241 /* Points to the FUNCTION_DECL of the function whose body we are reading. */
2242 extern GTY(()) tree current_function_decl
;
2244 /* Nonzero means a FUNC_BEGIN label was emitted. */
2245 extern GTY(()) const char * current_function_func_begin_label
;
2247 /* Information about the _FloatN and _FloatNx types. */
2248 extern const floatn_type_info floatn_nx_types
[NUM_FLOATN_NX_TYPES
];
2250 #endif // GCC_TREE_CORE_H