1/* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2022 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3. If not see
18<http://www.gnu.org/licenses/>. */
19
20#ifndef GCC_TREE_CORE_H
21#define GCC_TREE_CORE_H
22
23#include "symtab.h"
24
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. */
28
29/*---------------------------------------------------------------------------
30 Forward type declarations. Mostly to avoid including unnecessary headers
31---------------------------------------------------------------------------*/
32struct function;
33struct real_value;
34struct fixed_value;
35struct ptr_info_def;
36struct irange_storage_slot;
37struct die_struct;
38
39
40/*---------------------------------------------------------------------------
41 #defined constants
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
46 decls. */
47#define ECF_CONST (1 << 0)
48
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
51 decls. */
52#define ECF_PURE (1 << 1)
53
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
56 for function decls.*/
57#define ECF_LOOPING_CONST_OR_PURE (1 << 2)
58
59/* Nonzero if this call will never return. */
60#define ECF_NORETURN (1 << 3)
61
62/* Nonzero if this is a call to malloc or a related function. */
63#define ECF_MALLOC (1 << 4)
64
65/* Nonzero if it is plausible that this is a call to alloca. */
66#define ECF_MAY_BE_ALLOCA (1 << 5)
67
68/* Nonzero if this is a call to a function that won't throw an exception. */
69#define ECF_NOTHROW (1 << 6)
70
71/* Nonzero if this is a call to setjmp or a related function. */
72#define ECF_RETURNS_TWICE (1 << 7)
73
74/* Nonzero if this call replaces the current stack frame. */
75#define ECF_SIBCALL (1 << 8)
76
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)
80
81/* The function does not lead to calls within current function unit. */
82#define ECF_LEAF (1 << 10)
83
84/* Nonzero if this call returns its first argument. */
85#define ECF_RET1 (1 << 11)
86
87/* Nonzero if this call does not affect transactions. */
88#define ECF_TM_PURE (1 << 12)
89
90/* Nonzero if this call is into the transaction runtime library. */
91#define ECF_TM_BUILTIN (1 << 13)
92
93/* Nonzero if this is an indirect call by descriptor. */
94#define ECF_BY_DESCRIPTOR (1 << 14)
95
96/* Nonzero if this is a cold function. */
97#define ECF_COLD (1 << 15)
98
99/* Call argument flags. */
100
101/* Nonzero if the argument is not used by the function. */
102#define EAF_UNUSED (1 << 1)
103
104/* Following flags come in pairs. First one is about direct dereferences
105 from the parameter, while the second is about memory reachable by
106 recursive dereferences. */
107
108/* Nonzero if memory reached by the argument is not clobbered. */
109#define EAF_NO_DIRECT_CLOBBER (1 << 2)
110#define EAF_NO_INDIRECT_CLOBBER (1 << 3)
111
112/* Nonzero if the argument does not escape. */
113#define EAF_NO_DIRECT_ESCAPE (1 << 4)
114#define EAF_NO_INDIRECT_ESCAPE (1 << 5)
115
116/* Nonzero if the argument does not escape to return value. */
117#define EAF_NOT_RETURNED_DIRECTLY (1 << 6)
118#define EAF_NOT_RETURNED_INDIRECTLY (1 << 7)
119
120/* Nonzero if the argument is not read. */
121#define EAF_NO_DIRECT_READ (1 << 8)
122#define EAF_NO_INDIRECT_READ (1 << 9)
123
124/* Call return flags. */
125/* Mask for the argument number that is returned. Lower two bits of
126 the return flags, encodes argument slots zero to three. */
127#define ERF_RETURN_ARG_MASK (3)
128
129/* Nonzero if the return value is equal to the argument number
130 flags & ERF_RETURN_ARG_MASK. */
131#define ERF_RETURNS_ARG (1 << 2)
132
133/* Nonzero if the return value does not alias with anything. Functions
134 with the malloc attribute have this set on their return value. */
135#define ERF_NOALIAS (1 << 3)
136
137
138/*---------------------------------------------------------------------------
139 Enumerations
140---------------------------------------------------------------------------*/
141/* Codes of tree nodes. */
142#define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
143#define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
144
145enum tree_code {
146#include "all-tree.def"
147MAX_TREE_CODES
148};
149
150#undef DEFTREECODE
151#undef END_OF_BASE_TREE_CODES
152
153/* Number of language-independent tree codes. */
154#define NUM_TREE_CODES \
155 ((int) LAST_AND_UNUSED_TREE_CODE)
156
157#define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
158 (tree_contains_struct[(CODE)][(STRUCT)])
159
160
161/* Classify which part of the compiler has defined a given builtin function.
162 Note that we assume below that this is no more than two bits. */
163enum built_in_class {
164 NOT_BUILT_IN = 0,
165 BUILT_IN_FRONTEND,
166 BUILT_IN_MD,
167 BUILT_IN_NORMAL
168};
169
170/* Last marker used for LTO stremaing of built_in_class. We cannot add it
171 to the enum since we need the enumb to fit in 2 bits. */
172#define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
173
174/* Codes that identify the various built in functions
175 so that expand_call can identify them quickly. */
176#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
177enum built_in_function {
178#include "builtins.def"
179 /* Complex division routines in libgcc. These are done via builtins
180 because emit_library_call_value can't handle complex values. */
181 BUILT_IN_COMPLEX_MUL_MIN,
182 BUILT_IN_COMPLEX_MUL_MAX
183 = BUILT_IN_COMPLEX_MUL_MIN
184 + MAX_MODE_COMPLEX_FLOAT
185 - MIN_MODE_COMPLEX_FLOAT,
186
187 BUILT_IN_COMPLEX_DIV_MIN,
188 BUILT_IN_COMPLEX_DIV_MAX
189 = BUILT_IN_COMPLEX_DIV_MIN
190 + MAX_MODE_COMPLEX_FLOAT
191 - MIN_MODE_COMPLEX_FLOAT,
192
193 /* Upper bound on non-language-specific builtins. */
194 END_BUILTINS
195};
196
197/* Internal functions. */
198enum internal_fn {
199#define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
200#include "internal-fn.def"
201 IFN_LAST
202};
203
204/* An enum that combines target-independent built-in functions with
205 internal functions, so that they can be treated in a similar way.
206 The numbers for built-in functions are the same as for the
207 built_in_function enum. The numbers for internal functions
208 start at END_BUITLINS. */
209enum combined_fn {
210#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
211 CFN_##ENUM = int (ENUM),
212#include "builtins.def"
213
214
215#define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) \
216 CFN_##CODE = int (END_BUILTINS) + int (IFN_##CODE),
217#include "internal-fn.def"
218
219 CFN_LAST
220};
221
222/* Tree code classes. Each tree_code has an associated code class
223 represented by a TREE_CODE_CLASS. */
224enum tree_code_class {
225 tcc_exceptional, /* An exceptional code (fits no category). */
226 tcc_constant, /* A constant. */
227 /* Order of tcc_type and tcc_declaration is important. */
228 tcc_type, /* A type object code. */
229 tcc_declaration, /* A declaration (also serving as variable refs). */
230 tcc_reference, /* A reference to storage. */
231 tcc_comparison, /* A comparison expression. */
232 tcc_unary, /* A unary arithmetic expression. */
233 tcc_binary, /* A binary arithmetic expression. */
234 tcc_statement, /* A statement expression, which have side effects
235 but usually no interesting value. */
236 tcc_vl_exp, /* A function call or other expression with a
237 variable-length operand vector. */
238 tcc_expression /* Any other expression. */
239};
240
241/* OMP_CLAUSE codes. Do not reorder, as this is used to index into
242 the tables omp_clause_num_ops and omp_clause_code_name. */
243enum omp_clause_code {
244 /* Clause zero is special-cased inside the parser
245 (c_parser_omp_variable_list). */
246 OMP_CLAUSE_ERROR = 0,
247
248 /* OpenACC/OpenMP clause: private (variable_list). */
249 OMP_CLAUSE_PRIVATE,
250
251 /* OpenMP clause: shared (variable_list). */
252 OMP_CLAUSE_SHARED,
253
254 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
255 OMP_CLAUSE_FIRSTPRIVATE,
256
257 /* OpenMP clause: lastprivate (variable_list). */
258 OMP_CLAUSE_LASTPRIVATE,
259
260 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
261 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
262 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
263 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
264 into the shared one.
265 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
266 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
267 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
268 VAR_DECL placeholder, used like the above for C/C++ array
269 reductions. */
270 OMP_CLAUSE_REDUCTION,
271
272 /* OpenMP clause: task_reduction (operator:variable_list). */
273 OMP_CLAUSE_TASK_REDUCTION,
274
275 /* OpenMP clause: in_reduction (operator:variable_list). */
276 OMP_CLAUSE_IN_REDUCTION,
277
278 /* OpenMP clause: copyin (variable_list). */
279 OMP_CLAUSE_COPYIN,
280
281 /* OpenMP clause: copyprivate (variable_list). */
282 OMP_CLAUSE_COPYPRIVATE,
283
284 /* OpenMP clause: linear (variable-list[:linear-step]). */
285 OMP_CLAUSE_LINEAR,
286
287 /* OpenMP clause: affinity([depend-modifier :] variable-list). */
288 OMP_CLAUSE_AFFINITY,
289
290 /* OpenMP clause: aligned (variable-list[:alignment]). */
291 OMP_CLAUSE_ALIGNED,
292
293 /* OpenMP clause: allocate ([allocator:]variable-list). */
294 OMP_CLAUSE_ALLOCATE,
295
296 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
297 OMP_CLAUSE_DEPEND,
298
299 /* OpenMP clause: nontemporal (variable-list). */
300 OMP_CLAUSE_NONTEMPORAL,
301
302 /* OpenMP clause: uniform (argument-list). */
303 OMP_CLAUSE_UNIFORM,
304
305 /* OpenMP clause: enter (extended-list).
306 to is a deprecated alias when it appears in declare target. */
307 OMP_CLAUSE_ENTER,
308
309 /* OpenMP clause: link (variable-list). */
310 OMP_CLAUSE_LINK,
311
312 /* OpenMP clause: detach (event-handle). */
313 OMP_CLAUSE_DETACH,
314
315 /* OpenACC clause: use_device (variable-list).
316 OpenMP clause: use_device_ptr (ptr-list). */
317 OMP_CLAUSE_USE_DEVICE_PTR,
318
319 /* OpenMP clause: use_device_addr (variable-list). */
320 OMP_CLAUSE_USE_DEVICE_ADDR,
321
322 /* OpenMP clause: is_device_ptr (variable-list). */
323 OMP_CLAUSE_IS_DEVICE_PTR,
324
325 /* OpenMP clause: inclusive (variable-list). */
326 OMP_CLAUSE_INCLUSIVE,
327
328 /* OpenMP clause: exclusive (variable-list). */
329 OMP_CLAUSE_EXCLUSIVE,
330
331 /* OpenMP clause: from (variable-list). */
332 OMP_CLAUSE_FROM,
333
334 /* OpenMP clause: to (variable-list). */
335 OMP_CLAUSE_TO,
336
337 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
338 device, host (self), present, present_or_copy (pcopy), present_or_copyin
339 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
340 (variable-list).
341
342 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
343 OMP_CLAUSE_MAP,
344
345 /* OpenMP clause: has_device_addr (variable-list). */
346 OMP_CLAUSE_HAS_DEVICE_ADDR,
347
348 /* Internal structure to hold OpenACC cache directive's variable-list.
349 #pragma acc cache (variable-list). */
350 OMP_CLAUSE__CACHE_,
351
352 /* OpenACC clause: gang [(gang-argument-list)].
353 Where
354 gang-argument-list: [gang-argument-list, ] gang-argument
355 gang-argument: [num:] integer-expression
356 | static: size-expression
357 size-expression: * | integer-expression. */
358 OMP_CLAUSE_GANG,
359
360 /* OpenACC clause: async [(integer-expression)]. */
361 OMP_CLAUSE_ASYNC,
362
363 /* OpenACC clause: wait [(integer-expression-list)]. */
364 OMP_CLAUSE_WAIT,
365
366 /* OpenACC clause: auto. */
367 OMP_CLAUSE_AUTO,
368
369 /* OpenACC clause: seq. */
370 OMP_CLAUSE_SEQ,
371
372 /* Internal clause: temporary for combined loops expansion. */
373 OMP_CLAUSE__LOOPTEMP_,
374
375 /* Internal clause: temporary for task reductions. */
376 OMP_CLAUSE__REDUCTEMP_,
377
378 /* Internal clause: temporary for lastprivate(conditional:). */
379 OMP_CLAUSE__CONDTEMP_,
380
381 /* Internal clause: temporary for inscan reductions. */
382 OMP_CLAUSE__SCANTEMP_,
383
384 /* OpenACC/OpenMP clause: if (scalar-expression). */
385 OMP_CLAUSE_IF,
386
387 /* OpenMP clause: num_threads (integer-expression). */
388 OMP_CLAUSE_NUM_THREADS,
389
390 /* OpenMP clause: schedule. */
391 OMP_CLAUSE_SCHEDULE,
392
393 /* OpenMP clause: nowait. */
394 OMP_CLAUSE_NOWAIT,
395
396 /* OpenMP clause: ordered [(constant-integer-expression)]. */
397 OMP_CLAUSE_ORDERED,
398
399 /* OpenACC/OpenMP clause: default. */
400 OMP_CLAUSE_DEFAULT,
401
402 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
403 OMP_CLAUSE_COLLAPSE,
404
405 /* OpenMP clause: untied. */
406 OMP_CLAUSE_UNTIED,
407
408 /* OpenMP clause: final (scalar-expression). */
409 OMP_CLAUSE_FINAL,
410
411 /* OpenMP clause: mergeable. */
412 OMP_CLAUSE_MERGEABLE,
413
414 /* OpenMP clause: device (integer-expression). */
415 OMP_CLAUSE_DEVICE,
416
417 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
418 OMP_CLAUSE_DIST_SCHEDULE,
419
420 /* OpenMP clause: inbranch. */
421 OMP_CLAUSE_INBRANCH,
422
423 /* OpenMP clause: notinbranch. */
424 OMP_CLAUSE_NOTINBRANCH,
425
426 /* OpenMP clause: num_teams(integer-expression). */
427 OMP_CLAUSE_NUM_TEAMS,
428
429 /* OpenMP clause: thread_limit(integer-expression). */
430 OMP_CLAUSE_THREAD_LIMIT,
431
432 /* OpenMP clause: proc_bind ({master,close,spread}). */
433 OMP_CLAUSE_PROC_BIND,
434
435 /* OpenMP clause: safelen (constant-integer-expression). */
436 OMP_CLAUSE_SAFELEN,
437
438 /* OpenMP clause: simdlen (constant-integer-expression). */
439 OMP_CLAUSE_SIMDLEN,
440
441 /* OpenMP clause: device_type ({host,nohost,any}). */
442 OMP_CLAUSE_DEVICE_TYPE,
443
444 /* OpenMP clause: for. */
445 OMP_CLAUSE_FOR,
446
447 /* OpenMP clause: parallel. */
448 OMP_CLAUSE_PARALLEL,
449
450 /* OpenMP clause: sections. */
451 OMP_CLAUSE_SECTIONS,
452
453 /* OpenMP clause: taskgroup. */
454 OMP_CLAUSE_TASKGROUP,
455
456 /* OpenMP clause: priority (integer-expression). */
457 OMP_CLAUSE_PRIORITY,
458
459 /* OpenMP clause: grainsize (integer-expression). */
460 OMP_CLAUSE_GRAINSIZE,
461
462 /* OpenMP clause: num_tasks (integer-expression). */
463 OMP_CLAUSE_NUM_TASKS,
464
465 /* OpenMP clause: nogroup. */
466 OMP_CLAUSE_NOGROUP,
467
468 /* OpenMP clause: threads. */
469 OMP_CLAUSE_THREADS,
470
471 /* OpenMP clause: simd. */
472 OMP_CLAUSE_SIMD,
473
474 /* OpenMP clause: hint (integer-expression). */
475 OMP_CLAUSE_HINT,
476
477 /* OpenMP clause: defaultmap (tofrom: scalar). */
478 OMP_CLAUSE_DEFAULTMAP,
479
480 /* OpenMP clause: order (concurrent). */
481 OMP_CLAUSE_ORDER,
482
483 /* OpenMP clause: bind (binding). */
484 OMP_CLAUSE_BIND,
485
486 /* OpenMP clause: filter (integer-expression). */
487 OMP_CLAUSE_FILTER,
488
489 /* Internally used only clause, holding SIMD uid. */
490 OMP_CLAUSE__SIMDUID_,
491
492 /* Internally used only clause, flag whether this is SIMT simd
493 loop or not. */
494 OMP_CLAUSE__SIMT_,
495
496 /* OpenACC clause: independent. */
497 OMP_CLAUSE_INDEPENDENT,
498
499 /* OpenACC clause: worker [( [num:] integer-expression)]. */
500 OMP_CLAUSE_WORKER,
501
502 /* OpenACC clause: vector [( [length:] integer-expression)]. */
503 OMP_CLAUSE_VECTOR,
504
505 /* OpenACC clause: num_gangs (integer-expression). */
506 OMP_CLAUSE_NUM_GANGS,
507
508 /* OpenACC clause: num_workers (integer-expression). */
509 OMP_CLAUSE_NUM_WORKERS,
510
511 /* OpenACC clause: vector_length (integer-expression). */
512 OMP_CLAUSE_VECTOR_LENGTH,
513
514 /* OpenACC clause: tile ( size-expr-list ). */
515 OMP_CLAUSE_TILE,
516
517 /* OpenACC clause: if_present. */
518 OMP_CLAUSE_IF_PRESENT,
519
520 /* OpenACC clause: finalize. */
521 OMP_CLAUSE_FINALIZE,
522
523 /* OpenACC clause: nohost. */
524 OMP_CLAUSE_NOHOST,
525};
526
527#undef DEFTREESTRUCT
528#define DEFTREESTRUCT(ENUM, NAME) ENUM,
529enum tree_node_structure_enum {
530#include "treestruct.def"
531 LAST_TS_ENUM
532};
533#undef DEFTREESTRUCT
534
535enum omp_clause_schedule_kind {
536 OMP_CLAUSE_SCHEDULE_STATIC,
537 OMP_CLAUSE_SCHEDULE_DYNAMIC,
538 OMP_CLAUSE_SCHEDULE_GUIDED,
539 OMP_CLAUSE_SCHEDULE_AUTO,
540 OMP_CLAUSE_SCHEDULE_RUNTIME,
541 OMP_CLAUSE_SCHEDULE_MASK = (1 << 3) - 1,
542 OMP_CLAUSE_SCHEDULE_MONOTONIC = (1 << 3),
543 OMP_CLAUSE_SCHEDULE_NONMONOTONIC = (1 << 4),
544 OMP_CLAUSE_SCHEDULE_LAST = 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC - 1
545};
546
547enum omp_clause_default_kind {
548 OMP_CLAUSE_DEFAULT_UNSPECIFIED,
549 OMP_CLAUSE_DEFAULT_SHARED,
550 OMP_CLAUSE_DEFAULT_NONE,
551 OMP_CLAUSE_DEFAULT_PRIVATE,
552 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE,
553 OMP_CLAUSE_DEFAULT_PRESENT,
554 OMP_CLAUSE_DEFAULT_LAST
555};
556
557enum omp_clause_defaultmap_kind {
558 OMP_CLAUSE_DEFAULTMAP_CATEGORY_UNSPECIFIED,
559 OMP_CLAUSE_DEFAULTMAP_CATEGORY_SCALAR,
560 OMP_CLAUSE_DEFAULTMAP_CATEGORY_AGGREGATE,
561 OMP_CLAUSE_DEFAULTMAP_CATEGORY_ALLOCATABLE,
562 OMP_CLAUSE_DEFAULTMAP_CATEGORY_POINTER,
563 OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK = 7,
564 OMP_CLAUSE_DEFAULTMAP_ALLOC = 1 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
565 OMP_CLAUSE_DEFAULTMAP_TO = 2 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
566 OMP_CLAUSE_DEFAULTMAP_FROM = 3 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
567 OMP_CLAUSE_DEFAULTMAP_TOFROM = 4 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
568 OMP_CLAUSE_DEFAULTMAP_FIRSTPRIVATE
569 = 5 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
570 OMP_CLAUSE_DEFAULTMAP_NONE = 6 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
571 OMP_CLAUSE_DEFAULTMAP_DEFAULT
572 = 7 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
573 OMP_CLAUSE_DEFAULTMAP_MASK = 7 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1)
574};
575
576enum omp_clause_bind_kind {
577 OMP_CLAUSE_BIND_TEAMS,
578 OMP_CLAUSE_BIND_PARALLEL,
579 OMP_CLAUSE_BIND_THREAD
580};
581
582/* memory-order-clause on OpenMP atomic/flush constructs or
583 argument of atomic_default_mem_order clause. */
584enum omp_memory_order {
585 OMP_MEMORY_ORDER_UNSPECIFIED,
586 OMP_MEMORY_ORDER_RELAXED,
587 OMP_MEMORY_ORDER_ACQUIRE,
588 OMP_MEMORY_ORDER_RELEASE,
589 OMP_MEMORY_ORDER_ACQ_REL,
590 OMP_MEMORY_ORDER_SEQ_CST,
591 OMP_MEMORY_ORDER_MASK = 7,
592 OMP_FAIL_MEMORY_ORDER_UNSPECIFIED = OMP_MEMORY_ORDER_UNSPECIFIED * 8,
593 OMP_FAIL_MEMORY_ORDER_RELAXED = OMP_MEMORY_ORDER_RELAXED * 8,
594 OMP_FAIL_MEMORY_ORDER_ACQUIRE = OMP_MEMORY_ORDER_ACQUIRE * 8,
595 OMP_FAIL_MEMORY_ORDER_RELEASE = OMP_MEMORY_ORDER_RELEASE * 8,
596 OMP_FAIL_MEMORY_ORDER_ACQ_REL = OMP_MEMORY_ORDER_ACQ_REL * 8,
597 OMP_FAIL_MEMORY_ORDER_SEQ_CST = OMP_MEMORY_ORDER_SEQ_CST * 8,
598 OMP_FAIL_MEMORY_ORDER_MASK = OMP_MEMORY_ORDER_MASK * 8
599};
600#define OMP_FAIL_MEMORY_ORDER_SHIFT 3
601
602/* There is a TYPE_QUAL value for each type qualifier. They can be
603 combined by bitwise-or to form the complete set of qualifiers for a
604 type. */
605enum cv_qualifier {
606 TYPE_UNQUALIFIED = 0x0,
607 TYPE_QUAL_CONST = 0x1,
608 TYPE_QUAL_VOLATILE = 0x2,
609 TYPE_QUAL_RESTRICT = 0x4,
610 TYPE_QUAL_ATOMIC = 0x8
611};
612
613/* Standard named or nameless data types of the C compiler. */
614enum tree_index {
615 TI_ERROR_MARK,
616 TI_INTQI_TYPE,
617 TI_INTHI_TYPE,
618 TI_INTSI_TYPE,
619 TI_INTDI_TYPE,
620 TI_INTTI_TYPE,
621
622 TI_UINTQI_TYPE,
623 TI_UINTHI_TYPE,
624 TI_UINTSI_TYPE,
625 TI_UINTDI_TYPE,
626 TI_UINTTI_TYPE,
627
628 TI_ATOMICQI_TYPE,
629 TI_ATOMICHI_TYPE,
630 TI_ATOMICSI_TYPE,
631 TI_ATOMICDI_TYPE,
632 TI_ATOMICTI_TYPE,
633
634 TI_UINT16_TYPE,
635 TI_UINT32_TYPE,
636 TI_UINT64_TYPE,
637 TI_UINT128_TYPE,
638
639 TI_VOID,
640
641 TI_INTEGER_ZERO,
642 TI_INTEGER_ONE,
643 TI_INTEGER_THREE,
644 TI_INTEGER_MINUS_ONE,
645 TI_NULL_POINTER,
646
647 TI_SIZE_ZERO,
648 TI_SIZE_ONE,
649
650 TI_BITSIZE_ZERO,
651 TI_BITSIZE_ONE,
652 TI_BITSIZE_UNIT,
653
654 TI_PUBLIC,
655 TI_PROTECTED,
656 TI_PRIVATE,
657
658 TI_BOOLEAN_FALSE,
659 TI_BOOLEAN_TRUE,
660
661 TI_FLOAT_TYPE,
662 TI_DOUBLE_TYPE,
663 TI_LONG_DOUBLE_TYPE,
664
665 /* The _FloatN and _FloatNx types must be consecutive, and in the
666 same sequence as the corresponding complex types, which must also
667 be consecutive; _FloatN must come before _FloatNx; the order must
668 also be the same as in the floatn_nx_types array and the RID_*
669 values in c-common.h. This is so that iterations over these
670 types work as intended. */
671 TI_FLOAT16_TYPE,
672 TI_FLOATN_TYPE_FIRST = TI_FLOAT16_TYPE,
673 TI_FLOATN_NX_TYPE_FIRST = TI_FLOAT16_TYPE,
674 TI_FLOAT32_TYPE,
675 TI_FLOAT64_TYPE,
676 TI_FLOAT128_TYPE,
677 TI_FLOATN_TYPE_LAST = TI_FLOAT128_TYPE,
678#define NUM_FLOATN_TYPES (TI_FLOATN_TYPE_LAST - TI_FLOATN_TYPE_FIRST + 1)
679 TI_FLOAT32X_TYPE,
680 TI_FLOATNX_TYPE_FIRST = TI_FLOAT32X_TYPE,
681 TI_FLOAT64X_TYPE,
682 TI_FLOAT128X_TYPE,
683 TI_FLOATNX_TYPE_LAST = TI_FLOAT128X_TYPE,
684 TI_FLOATN_NX_TYPE_LAST = TI_FLOAT128X_TYPE,
685#define NUM_FLOATNX_TYPES (TI_FLOATNX_TYPE_LAST - TI_FLOATNX_TYPE_FIRST + 1)
686#define NUM_FLOATN_NX_TYPES (TI_FLOATN_NX_TYPE_LAST \
687 - TI_FLOATN_NX_TYPE_FIRST \
688 + 1)
689
690 /* Put the complex types after their component types, so that in (sequential)
691 tree streaming we can assert that their component types have already been
692 handled (see tree-streamer.cc:record_common_node). */
693 TI_COMPLEX_INTEGER_TYPE,
694 TI_COMPLEX_FLOAT_TYPE,
695 TI_COMPLEX_DOUBLE_TYPE,
696 TI_COMPLEX_LONG_DOUBLE_TYPE,
697
698 TI_COMPLEX_FLOAT16_TYPE,
699 TI_COMPLEX_FLOATN_NX_TYPE_FIRST = TI_COMPLEX_FLOAT16_TYPE,
700 TI_COMPLEX_FLOAT32_TYPE,
701 TI_COMPLEX_FLOAT64_TYPE,
702 TI_COMPLEX_FLOAT128_TYPE,
703 TI_COMPLEX_FLOAT32X_TYPE,
704 TI_COMPLEX_FLOAT64X_TYPE,
705 TI_COMPLEX_FLOAT128X_TYPE,
706
707 TI_FLOAT_PTR_TYPE,
708 TI_DOUBLE_PTR_TYPE,
709 TI_LONG_DOUBLE_PTR_TYPE,
710 TI_INTEGER_PTR_TYPE,
711
712 TI_VOID_TYPE,
713 TI_PTR_TYPE,
714 TI_CONST_PTR_TYPE,
715 TI_SIZE_TYPE,
716 TI_PID_TYPE,
717 TI_PTRDIFF_TYPE,
718 TI_VA_LIST_TYPE,
719 TI_VA_LIST_GPR_COUNTER_FIELD,
720 TI_VA_LIST_FPR_COUNTER_FIELD,
721 TI_BOOLEAN_TYPE,
722 TI_FILEPTR_TYPE,
723 TI_CONST_TM_PTR_TYPE,
724 TI_FENV_T_PTR_TYPE,
725 TI_CONST_FENV_T_PTR_TYPE,
726 TI_FEXCEPT_T_PTR_TYPE,
727 TI_CONST_FEXCEPT_T_PTR_TYPE,
728 TI_POINTER_SIZED_TYPE,
729
730 TI_DFLOAT32_TYPE,
731 TI_DFLOAT64_TYPE,
732 TI_DFLOAT128_TYPE,
733
734 TI_VOID_LIST_NODE,
735
736 TI_MAIN_IDENTIFIER,
737
738 TI_SAT_SFRACT_TYPE,
739 TI_SAT_FRACT_TYPE,
740 TI_SAT_LFRACT_TYPE,
741 TI_SAT_LLFRACT_TYPE,
742 TI_SAT_USFRACT_TYPE,
743 TI_SAT_UFRACT_TYPE,
744 TI_SAT_ULFRACT_TYPE,
745 TI_SAT_ULLFRACT_TYPE,
746 TI_SFRACT_TYPE,
747 TI_FRACT_TYPE,
748 TI_LFRACT_TYPE,
749 TI_LLFRACT_TYPE,
750 TI_USFRACT_TYPE,
751 TI_UFRACT_TYPE,
752 TI_ULFRACT_TYPE,
753 TI_ULLFRACT_TYPE,
754 TI_SAT_SACCUM_TYPE,
755 TI_SAT_ACCUM_TYPE,
756 TI_SAT_LACCUM_TYPE,
757 TI_SAT_LLACCUM_TYPE,
758 TI_SAT_USACCUM_TYPE,
759 TI_SAT_UACCUM_TYPE,
760 TI_SAT_ULACCUM_TYPE,
761 TI_SAT_ULLACCUM_TYPE,
762 TI_SACCUM_TYPE,
763 TI_ACCUM_TYPE,
764 TI_LACCUM_TYPE,
765 TI_LLACCUM_TYPE,
766 TI_USACCUM_TYPE,
767 TI_UACCUM_TYPE,
768 TI_ULACCUM_TYPE,
769 TI_ULLACCUM_TYPE,
770 TI_QQ_TYPE,
771 TI_HQ_TYPE,
772 TI_SQ_TYPE,
773 TI_DQ_TYPE,
774 TI_TQ_TYPE,
775 TI_UQQ_TYPE,
776 TI_UHQ_TYPE,
777 TI_USQ_TYPE,
778 TI_UDQ_TYPE,
779 TI_UTQ_TYPE,
780 TI_SAT_QQ_TYPE,
781 TI_SAT_HQ_TYPE,
782 TI_SAT_SQ_TYPE,
783 TI_SAT_DQ_TYPE,
784 TI_SAT_TQ_TYPE,
785 TI_SAT_UQQ_TYPE,
786 TI_SAT_UHQ_TYPE,
787 TI_SAT_USQ_TYPE,
788 TI_SAT_UDQ_TYPE,
789 TI_SAT_UTQ_TYPE,
790 TI_HA_TYPE,
791 TI_SA_TYPE,
792 TI_DA_TYPE,
793 TI_TA_TYPE,
794 TI_UHA_TYPE,
795 TI_USA_TYPE,
796 TI_UDA_TYPE,
797 TI_UTA_TYPE,
798 TI_SAT_HA_TYPE,
799 TI_SAT_SA_TYPE,
800 TI_SAT_DA_TYPE,
801 TI_SAT_TA_TYPE,
802 TI_SAT_UHA_TYPE,
803 TI_SAT_USA_TYPE,
804 TI_SAT_UDA_TYPE,
805 TI_SAT_UTA_TYPE,
806
807 TI_MODULE_HWM,
808 /* Nodes below here change during compilation, and should therefore
809 not be in the C++ module's global tree table. */
810
811 TI_OPTIMIZATION_DEFAULT,
812 TI_OPTIMIZATION_CURRENT,
813 TI_TARGET_OPTION_DEFAULT,
814 TI_TARGET_OPTION_CURRENT,
815 TI_CURRENT_TARGET_PRAGMA,
816 TI_CURRENT_OPTIMIZE_PRAGMA,
817
818 TI_CHREC_DONT_KNOW,
819 TI_CHREC_KNOWN,
820
821 TI_MAX
822};
823
824/* An enumeration of the standard C integer types. These must be
825 ordered so that shorter types appear before longer ones, and so
826 that signed types appear before unsigned ones, for the correct
827 functioning of interpret_integer() in c-lex.cc. */
828enum integer_type_kind {
829 itk_char,
830 itk_signed_char,
831 itk_unsigned_char,
832 itk_short,
833 itk_unsigned_short,
834 itk_int,
835 itk_unsigned_int,
836 itk_long,
837 itk_unsigned_long,
838 itk_long_long,
839 itk_unsigned_long_long,
840
841 itk_intN_0,
842 itk_unsigned_intN_0,
843 itk_intN_1,
844 itk_unsigned_intN_1,
845 itk_intN_2,
846 itk_unsigned_intN_2,
847 itk_intN_3,
848 itk_unsigned_intN_3,
849
850 itk_none
851};
852
853/* A pointer-to-function member type looks like:
854
855 struct {
856 __P __pfn;
857 ptrdiff_t __delta;
858 };
859
860 If __pfn is NULL, it is a NULL pointer-to-member-function.
861
862 (Because the vtable is always the first thing in the object, we
863 don't need its offset.) If the function is virtual, then PFN is
864 one plus twice the index into the vtable; otherwise, it is just a
865 pointer to the function.
866
867 Unfortunately, using the lowest bit of PFN doesn't work in
868 architectures that don't impose alignment requirements on function
869 addresses, or that use the lowest bit to tell one ISA from another,
870 for example. For such architectures, we use the lowest bit of
871 DELTA instead of the lowest bit of the PFN, and DELTA will be
872 multiplied by 2. */
873enum ptrmemfunc_vbit_where_t {
874 ptrmemfunc_vbit_in_pfn,
875 ptrmemfunc_vbit_in_delta
876};
877
878/* Flags that may be passed in the third argument of decl_attributes, and
879 to handler functions for attributes. */
880enum attribute_flags {
881 /* The type passed in is the type of a DECL, and any attributes that
882 should be passed in again to be applied to the DECL rather than the
883 type should be returned. */
884 ATTR_FLAG_DECL_NEXT = 1,
885 /* The type passed in is a function return type, and any attributes that
886 should be passed in again to be applied to the function type rather
887 than the return type should be returned. */
888 ATTR_FLAG_FUNCTION_NEXT = 2,
889 /* The type passed in is an array element type, and any attributes that
890 should be passed in again to be applied to the array type rather
891 than the element type should be returned. */
892 ATTR_FLAG_ARRAY_NEXT = 4,
893 /* The type passed in is a structure, union or enumeration type being
894 created, and should be modified in place. */
895 ATTR_FLAG_TYPE_IN_PLACE = 8,
896 /* The attributes are being applied by default to a library function whose
897 name indicates known behavior, and should be silently ignored if they
898 are not in fact compatible with the function type. */
899 ATTR_FLAG_BUILT_IN = 16,
900 /* A given attribute has been parsed as a C++-11 attribute. */
901 ATTR_FLAG_CXX11 = 32,
902 /* The attribute handler is being invoked with an internal argument
903 that may not otherwise be valid when specified in source code. */
904 ATTR_FLAG_INTERNAL = 64
905};
906
907/* Types used to represent sizes. */
908enum size_type_kind {
909 stk_sizetype, /* Normal representation of sizes in bytes. */
910 stk_ssizetype, /* Signed representation of sizes in bytes. */
911 stk_bitsizetype, /* Normal representation of sizes in bits. */
912 stk_sbitsizetype, /* Signed representation of sizes in bits. */
913 stk_type_kind_last
914};
915
916/* Flags controlling operand_equal_p() behavior. */
917enum operand_equal_flag {
918 OEP_ONLY_CONST = 1,
919 OEP_PURE_SAME = 2,
920 OEP_MATCH_SIDE_EFFECTS = 4,
921 OEP_ADDRESS_OF = 8,
922 /* Internal within operand_equal_p: */
923 OEP_NO_HASH_CHECK = 16,
924 /* Internal within inchash::add_expr: */
925 OEP_HASH_CHECK = 32,
926 /* Makes operand_equal_p handle more expressions: */
927 OEP_LEXICOGRAPHIC = 64,
928 OEP_BITWISE = 128,
929 /* For OEP_ADDRESS_OF of COMPONENT_REFs, only consider same fields as
930 equivalent rather than also different fields with the same offset. */
931 OEP_ADDRESS_OF_SAME_FIELD = 256,
932 /* In conjunction with OEP_LEXICOGRAPHIC considers names of declarations
933 of the same kind. Used to compare VLA bounds involving parameters
934 across redeclarations of the same function. */
935 OEP_DECL_NAME = 512
936};
937
938/* Enum and arrays used for tree allocation stats.
939 Keep in sync with tree.cc:tree_node_kind_names. */
940enum tree_node_kind {
941 d_kind,
942 t_kind,
943 b_kind,
944 s_kind,
945 r_kind,
946 e_kind,
947 c_kind,
948 id_kind,
949 vec_kind,
950 binfo_kind,
951 ssa_name_kind,
952 constr_kind,
953 x_kind,
954 lang_decl,
955 lang_type,
956 omp_clause_kind,
957 all_kinds
958};
959
960enum annot_expr_kind {
961 annot_expr_ivdep_kind,
962 annot_expr_unroll_kind,
963 annot_expr_no_vector_kind,
964 annot_expr_vector_kind,
965 annot_expr_parallel_kind,
966 annot_expr_kind_last
967};
968
969/* The kind of a TREE_CLOBBER_P CONSTRUCTOR node. */
970enum clobber_kind {
971 /* Unspecified, this clobber acts as a store of an undefined value. */
972 CLOBBER_UNDEF,
973 /* This clobber ends the lifetime of the storage. */
974 CLOBBER_EOL,
975 CLOBBER_LAST
976};
977
978/*---------------------------------------------------------------------------
979 Type definitions
980---------------------------------------------------------------------------*/
981/* When processing aliases at the symbol table level, we need the
982 declaration of target. For this reason we need to queue aliases and
983 process them after all declarations has been produced. */
984struct GTY(()) alias_pair {
985 tree decl;
986 tree target;
987};
988
989/* An initialization priority. */
990typedef unsigned short priority_type;
991
992/* The type of a callback function for walking over tree structure. */
993typedef tree (*walk_tree_fn) (tree *, int *, void *);
994
995/* The type of a callback function that represents a custom walk_tree. */
996typedef tree (*walk_tree_lh) (tree *, int *, tree (*) (tree *, int *, void *),
997 void *, hash_set<tree> *);
998
999
1000/*---------------------------------------------------------------------------
1001 Main data structures
1002---------------------------------------------------------------------------*/
1003/* A tree node can represent a data type, a variable, an expression
1004 or a statement. Each node has a TREE_CODE which says what kind of
1005 thing it represents. Some common codes are:
1006 INTEGER_TYPE -- represents a type of integers.
1007 ARRAY_TYPE -- represents a type of pointer.
1008 VAR_DECL -- represents a declared variable.
1009 INTEGER_CST -- represents a constant integer value.
1010 PLUS_EXPR -- represents a sum (an expression).
1011
1012 As for the contents of a tree node: there are some fields
1013 that all nodes share. Each TREE_CODE has various special-purpose
1014 fields as well. The fields of a node are never accessed directly,
1015 always through accessor macros. */
1016
1017/* Every kind of tree node starts with this structure,
1018 so all nodes have these fields.
1019
1020 See the accessor macros, defined below, for documentation of the
1021 fields, and the table below which connects the fields and the
1022 accessor macros. */
1023
1024struct GTY(()) tree_base {
1025 ENUM_BITFIELD(tree_code) code : 16;
1026
1027 unsigned side_effects_flag : 1;
1028 unsigned constant_flag : 1;
1029 unsigned addressable_flag : 1;
1030 unsigned volatile_flag : 1;
1031 unsigned readonly_flag : 1;
1032 unsigned asm_written_flag: 1;
1033 unsigned nowarning_flag : 1;
1034 unsigned visited : 1;
1035
1036 unsigned used_flag : 1;
1037 unsigned nothrow_flag : 1;
1038 unsigned static_flag : 1;
1039 unsigned public_flag : 1;
1040 unsigned private_flag : 1;
1041 unsigned protected_flag : 1;
1042 unsigned deprecated_flag : 1;
1043 unsigned default_def_flag : 1;
1044
1045 union {
1046 /* The bits in the following structure should only be used with
1047 accessor macros that constrain inputs with tree checking. */
1048 struct {
1049 unsigned lang_flag_0 : 1;
1050 unsigned lang_flag_1 : 1;
1051 unsigned lang_flag_2 : 1;
1052 unsigned lang_flag_3 : 1;
1053 unsigned lang_flag_4 : 1;
1054 unsigned lang_flag_5 : 1;
1055 unsigned lang_flag_6 : 1;
1056 unsigned saturating_flag : 1;
1057
1058 unsigned unsigned_flag : 1;
1059 unsigned packed_flag : 1;
1060 unsigned user_align : 1;
1061 unsigned nameless_flag : 1;
1062 unsigned atomic_flag : 1;
1063 unsigned unavailable_flag : 1;
1064 unsigned spare0 : 2;
1065
1066 unsigned spare1 : 8;
1067
1068 /* This field is only used with TREE_TYPE nodes; the only reason it is
1069 present in tree_base instead of tree_type is to save space. The size
1070 of the field must be large enough to hold addr_space_t values.
1071 For CONSTRUCTOR nodes this holds the clobber_kind enum. */
1072 unsigned address_space : 8;
1073 } bits;
1074
1075 /* The following fields are present in tree_base to save space. The
1076 nodes using them do not require any of the flags above and so can
1077 make better use of the 4-byte sized word. */
1078
1079 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
1080 struct {
1081 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
1082 its native precision. */
1083 unsigned char unextended;
1084
1085 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
1086 wider precisions based on its TYPE_SIGN. */
1087 unsigned char extended;
1088
1089 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
1090 offset_int precision, with smaller integers being extended
1091 according to their TYPE_SIGN. This is equal to one of the two
1092 fields above but is cached for speed. */
1093 unsigned char offset;
1094 } int_length;
1095
1096 /* VEC length. This field is only used with TREE_VEC. */
1097 int length;
1098
1099 /* This field is only used with VECTOR_CST. */
1100 struct {
1101 /* The value of VECTOR_CST_LOG2_NPATTERNS. */
1102 unsigned int log2_npatterns : 8;
1103
1104 /* The value of VECTOR_CST_NELTS_PER_PATTERN. */
1105 unsigned int nelts_per_pattern : 8;
1106
1107 /* For future expansion. */
1108 unsigned int unused : 16;
1109 } vector_cst;
1110
1111 /* SSA version number. This field is only used with SSA_NAME. */
1112 unsigned int version;
1113
1114 /* CHREC_VARIABLE. This field is only used with POLYNOMIAL_CHREC. */
1115 unsigned int chrec_var;
1116
1117 /* Internal function code. */
1118 enum internal_fn ifn;
1119
1120 /* OMP_ATOMIC* memory order. */
1121 enum omp_memory_order omp_atomic_memory_order;
1122
1123 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
1124 expression trees and specify known data non-dependences. For
1125 two memory references in a function they are known to not
1126 alias if dependence_info.clique are equal and dependence_info.base
1127 are distinct. Clique number zero means there is no information,
1128 clique number one is populated from function global information
1129 and thus needs no remapping on transforms like loop unrolling. */
1130 struct {
1131 unsigned short clique;
1132 unsigned short base;
1133 } dependence_info;
1134 } GTY((skip(""))) u;
1135};
1136
1137/* The following table lists the uses of each of the above flags and
1138 for which types of nodes they are defined.
1139
1140 addressable_flag:
1141
1142 TREE_ADDRESSABLE in
1143 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
1144 SSA_NAME
1145 all types
1146 CONSTRUCTOR, IDENTIFIER_NODE
1147 STMT_EXPR
1148
1149 CALL_EXPR_TAILCALL in
1150 CALL_EXPR
1151
1152 CASE_LOW_SEEN in
1153 CASE_LABEL_EXPR
1154
1155 PREDICT_EXPR_OUTCOME in
1156 PREDICT_EXPR
1157
1158 OMP_CLAUSE_MAP_DECL_MAKE_ADDRESSABLE in
1159 OMP_CLAUSE
1160
1161 static_flag:
1162
1163 TREE_STATIC in
1164 VAR_DECL, FUNCTION_DECL
1165 CONSTRUCTOR
1166
1167 TREE_NO_TRAMPOLINE in
1168 ADDR_EXPR
1169
1170 BINFO_VIRTUAL_P in
1171 TREE_BINFO
1172
1173 TREE_SYMBOL_REFERENCED in
1174 IDENTIFIER_NODE
1175
1176 CLEANUP_EH_ONLY in
1177 TARGET_EXPR, WITH_CLEANUP_EXPR
1178
1179 TRY_CATCH_IS_CLEANUP in
1180 TRY_CATCH_EXPR
1181
1182 ASM_INPUT_P in
1183 ASM_EXPR
1184
1185 TYPE_REF_CAN_ALIAS_ALL in
1186 POINTER_TYPE, REFERENCE_TYPE
1187
1188 CASE_HIGH_SEEN in
1189 CASE_LABEL_EXPR
1190
1191 ENUM_IS_SCOPED in
1192 ENUMERAL_TYPE
1193
1194 TRANSACTION_EXPR_OUTER in
1195 TRANSACTION_EXPR
1196
1197 MUST_TAIL_CALL in
1198 CALL_EXPR
1199
1200 public_flag:
1201
1202 TREE_OVERFLOW in
1203 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
1204
1205 TREE_PUBLIC in
1206 VAR_DECL, FUNCTION_DECL
1207 IDENTIFIER_NODE
1208
1209 CONSTRUCTOR_NO_CLEARING in
1210 CONSTRUCTOR
1211
1212 ASM_VOLATILE_P in
1213 ASM_EXPR
1214
1215 CALL_EXPR_VA_ARG_PACK in
1216 CALL_EXPR
1217
1218 TYPE_CACHED_VALUES_P in
1219 all types
1220
1221 SAVE_EXPR_RESOLVED_P in
1222 SAVE_EXPR
1223
1224 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
1225 OMP_CLAUSE_LASTPRIVATE
1226
1227 OMP_CLAUSE_PRIVATE_DEBUG in
1228 OMP_CLAUSE_PRIVATE
1229
1230 OMP_CLAUSE_LINEAR_NO_COPYIN in
1231 OMP_CLAUSE_LINEAR
1232
1233 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1234 OMP_CLAUSE_MAP
1235
1236 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1237 OMP_CLAUSE_{,TASK_,IN_}REDUCTION
1238
1239 OMP_CLAUSE_USE_DEVICE_PTR_IF_PRESENT in
1240 OMP_CLAUSE_USE_DEVICE_PTR
1241
1242 TRANSACTION_EXPR_RELAXED in
1243 TRANSACTION_EXPR
1244
1245 FALLTHROUGH_LABEL_P in
1246 LABEL_DECL
1247
1248 SSA_NAME_IS_VIRTUAL_OPERAND in
1249 SSA_NAME
1250
1251 EXPR_LOCATION_WRAPPER_P in
1252 NON_LVALUE_EXPR, VIEW_CONVERT_EXPR
1253
1254 private_flag:
1255
1256 TREE_PRIVATE in
1257 all decls
1258
1259 CALL_EXPR_RETURN_SLOT_OPT in
1260 CALL_EXPR
1261
1262 OMP_SECTION_LAST in
1263 OMP_SECTION
1264
1265 OMP_PARALLEL_COMBINED in
1266 OMP_PARALLEL
1267
1268 OMP_CLAUSE_PRIVATE_OUTER_REF in
1269 OMP_CLAUSE_PRIVATE
1270
1271 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1272 OMP_CLAUSE_LINEAR
1273
1274 TYPE_REF_IS_RVALUE in
1275 REFERENCE_TYPE
1276
1277 ENUM_IS_OPAQUE in
1278 ENUMERAL_TYPE
1279
1280 protected_flag:
1281
1282 TREE_PROTECTED in
1283 BLOCK
1284 all decls
1285
1286 CALL_FROM_THUNK_P and
1287 CALL_ALLOCA_FOR_VAR_P and
1288 CALL_FROM_NEW_OR_DELETE_P in
1289 CALL_EXPR
1290
1291 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1292 OMP_CLAUSE_LINEAR
1293
1294 ASM_INLINE_P in
1295 ASM_EXPR
1296
1297 side_effects_flag:
1298
1299 TREE_SIDE_EFFECTS in
1300 all expressions
1301 all decls
1302 all constants
1303
1304 FORCED_LABEL in
1305 LABEL_DECL
1306
1307 volatile_flag:
1308
1309 TREE_THIS_VOLATILE in
1310 all expressions
1311 all decls
1312
1313 TYPE_VOLATILE in
1314 all types
1315
1316 readonly_flag:
1317
1318 TREE_READONLY in
1319 all expressions
1320 all decls
1321
1322 TYPE_READONLY in
1323 all types
1324
1325 constant_flag:
1326
1327 TREE_CONSTANT in
1328 all expressions
1329 all decls
1330 all constants
1331
1332 TYPE_SIZES_GIMPLIFIED in
1333 all types
1334
1335 unsigned_flag:
1336
1337 TYPE_UNSIGNED in
1338 all types
1339
1340 DECL_UNSIGNED in
1341 all decls
1342
1343 asm_written_flag:
1344
1345 TREE_ASM_WRITTEN in
1346 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1347 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1348 BLOCK, STRING_CST
1349
1350 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1351 SSA_NAME
1352
1353 used_flag:
1354
1355 TREE_USED in
1356 all expressions
1357 all decls
1358 IDENTIFIER_NODE
1359
1360 nothrow_flag:
1361
1362 TREE_NOTHROW in
1363 CALL_EXPR
1364 FUNCTION_DECL
1365
1366 TREE_THIS_NOTRAP in
1367 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1368
1369 SSA_NAME_IN_FREE_LIST in
1370 SSA_NAME
1371
1372 DECL_NONALIASED in
1373 VAR_DECL
1374
1375 deprecated_flag:
1376
1377 TREE_DEPRECATED in
1378 all decls
1379 all types
1380
1381 IDENTIFIER_TRANSPARENT_ALIAS in
1382 IDENTIFIER_NODE
1383
1384 SSA_NAME_POINTS_TO_READONLY_MEMORY in
1385 SSA_NAME
1386
1387 unavailable_flag:
1388
1389 TREE_UNAVAILABLE in
1390 all decls
1391 all types
1392
1393 visited:
1394
1395 TREE_VISITED in
1396 all trees (used liberally by many passes)
1397
1398 saturating_flag:
1399
1400 TYPE_REVERSE_STORAGE_ORDER in
1401 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1402
1403 TYPE_SATURATING in
1404 other types
1405
1406 VAR_DECL_IS_VIRTUAL_OPERAND in
1407 VAR_DECL
1408
1409 nowarning_flag:
1410
1411 TREE_NO_WARNING in
1412 all expressions
1413 all decls
1414
1415 TYPE_ARTIFICIAL in
1416 all types
1417
1418 default_def_flag:
1419
1420 TYPE_FINAL_P in
1421 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1422
1423 TYPE_VECTOR_OPAQUE in
1424 VECTOR_TYPE
1425
1426 SSA_NAME_IS_DEFAULT_DEF in
1427 SSA_NAME
1428
1429 DECL_NONLOCAL_FRAME in
1430 VAR_DECL
1431
1432 REF_REVERSE_STORAGE_ORDER in
1433 BIT_FIELD_REF, MEM_REF
1434
1435 FUNC_ADDR_BY_DESCRIPTOR in
1436 ADDR_EXPR
1437
1438 CALL_EXPR_BY_DESCRIPTOR in
1439 CALL_EXPR
1440
1441*/
1442
1443struct GTY(()) tree_typed {
1444 struct tree_base base;
1445 tree type;
1446};
1447
1448struct GTY(()) tree_common {
1449 struct tree_typed typed;
1450 tree chain;
1451};
1452
1453struct GTY(()) tree_int_cst {
1454 struct tree_typed typed;
1455 HOST_WIDE_INT val[1];
1456};
1457
1458
1459struct GTY(()) tree_real_cst {
1460 struct tree_typed typed;
1461 struct real_value value;
1462};
1463
1464struct GTY(()) tree_fixed_cst {
1465 struct tree_typed typed;
1466 struct fixed_value * fixed_cst_ptr;
1467};
1468
1469struct GTY(()) tree_string {
1470 struct tree_typed typed;
1471 int length;
1472 char str[1];
1473};
1474
1475struct GTY(()) tree_complex {
1476 struct tree_typed typed;
1477 tree real;
1478 tree imag;
1479};
1480
1481struct GTY(()) tree_vector {
1482 struct tree_typed typed;
1483 tree GTY ((length ("vector_cst_encoded_nelts ((tree) &%h)"))) elts[1];
1484};
1485
1486struct GTY(()) tree_poly_int_cst {
1487 struct tree_typed typed;
1488 tree coeffs[NUM_POLY_INT_COEFFS];
1489};
1490
1491struct GTY(()) tree_identifier {
1492 struct tree_common common;
1493 struct ht_identifier id;
1494};
1495
1496struct GTY(()) tree_list {
1497 struct tree_common common;
1498 tree purpose;
1499 tree value;
1500};
1501
1502struct GTY(()) tree_vec {
1503 struct tree_common common;
1504 tree GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a[1];
1505};
1506
1507/* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1508 element. INDEX can optionally design the position of VALUE: in arrays,
1509 it is the index where VALUE has to be placed; in structures, it is the
1510 FIELD_DECL of the member. */
1511struct GTY(()) constructor_elt {
1512 tree index;
1513 tree value;
1514};
1515
1516struct GTY(()) tree_constructor {
1517 struct tree_typed typed;
1518 vec<constructor_elt, va_gc> *elts;
1519};
1520
1521enum omp_clause_depend_kind
1522{
1523 OMP_CLAUSE_DEPEND_IN,
1524 OMP_CLAUSE_DEPEND_OUT,
1525 OMP_CLAUSE_DEPEND_INOUT,
1526 OMP_CLAUSE_DEPEND_MUTEXINOUTSET,
1527 OMP_CLAUSE_DEPEND_INOUTSET,
1528 OMP_CLAUSE_DEPEND_SOURCE,
1529 OMP_CLAUSE_DEPEND_SINK,
1530 OMP_CLAUSE_DEPEND_DEPOBJ,
1531 OMP_CLAUSE_DEPEND_LAST
1532};
1533
1534enum omp_clause_proc_bind_kind
1535{
1536 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1537 OMP_CLAUSE_PROC_BIND_FALSE = 0,
1538 OMP_CLAUSE_PROC_BIND_TRUE = 1,
1539 OMP_CLAUSE_PROC_BIND_PRIMARY = 2,
1540 OMP_CLAUSE_PROC_BIND_MASTER = 2,
1541 OMP_CLAUSE_PROC_BIND_CLOSE = 3,
1542 OMP_CLAUSE_PROC_BIND_SPREAD = 4,
1543 OMP_CLAUSE_PROC_BIND_LAST
1544};
1545
1546enum omp_clause_device_type_kind
1547{
1548 OMP_CLAUSE_DEVICE_TYPE_HOST = 1,
1549 OMP_CLAUSE_DEVICE_TYPE_NOHOST = 2,
1550 OMP_CLAUSE_DEVICE_TYPE_ANY = 3
1551};
1552
1553enum omp_clause_linear_kind
1554{
1555 OMP_CLAUSE_LINEAR_DEFAULT,
1556 OMP_CLAUSE_LINEAR_REF,
1557 OMP_CLAUSE_LINEAR_VAL,
1558 OMP_CLAUSE_LINEAR_UVAL
1559};
1560
1561struct GTY(()) tree_exp {
1562 struct tree_typed typed;
1563 location_t locus;
1564 tree GTY ((length ("TREE_OPERAND_LENGTH ((tree)&%h)"))) operands[1];
1565};
1566
1567/* Immediate use linking structure. This structure is used for maintaining
1568 a doubly linked list of uses of an SSA_NAME. */
1569struct GTY(()) ssa_use_operand_t {
1570 struct ssa_use_operand_t* GTY((skip(""))) prev;
1571 struct ssa_use_operand_t* GTY((skip(""))) next;
1572 /* Immediate uses for a given SSA name are maintained as a cyclic
1573 list. To recognize the root of this list, the location field
1574 needs to point to the original SSA name. Since statements and
1575 SSA names are of different data types, we need this union. See
1576 the explanation in struct imm_use_iterator. */
1577 union { gimple *stmt; tree ssa_name; } GTY((skip(""))) loc;
1578 tree *GTY((skip(""))) use;
1579};
1580
1581struct GTY(()) tree_ssa_name {
1582 struct tree_typed typed;
1583
1584 /* _DECL wrapped by this SSA name. */
1585 tree var;
1586
1587 /* Statement that defines this SSA name. */
1588 gimple *def_stmt;
1589
1590 /* Value range information. */
1591 union ssa_name_info_type {
1592 /* Ranges for integers. */
1593 struct GTY ((tag ("0"))) irange_storage_slot *irange_info;
1594 /* Ranges for floating point numbers. */
1595 struct GTY ((tag ("1"))) frange_storage_slot *frange_info;
1596 /* Pointer attributes used for alias analysis. */
1597 struct GTY ((tag ("2"))) ptr_info_def *ptr_info;
1598 /* This holds any range info supported by ranger (except ptr_info
1599 above) and is managed by vrange_storage. */
1600 void * GTY ((skip)) range_info;
1601 } GTY ((desc ("%1.typed.type ?" \
1602 "(POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) ? 2 : SCALAR_FLOAT_TYPE_P (TREE_TYPE ((tree)&%1))) : 3"))) info;
1603 /* Immediate uses list for this SSA_NAME. */
1604 struct ssa_use_operand_t imm_uses;
1605};
1606
1607struct GTY(()) phi_arg_d {
1608 /* imm_use MUST be the first element in struct because we do some
1609 pointer arithmetic with it. See phi_arg_index_from_use. */
1610 struct ssa_use_operand_t imm_use;
1611 tree def;
1612 location_t locus;
1613};
1614
1615struct GTY(()) tree_omp_clause {
1616 struct tree_common common;
1617 location_t locus;
1618 enum omp_clause_code code;
1619 union omp_clause_subcode {
1620 enum omp_clause_default_kind default_kind;
1621 enum omp_clause_schedule_kind schedule_kind;
1622 enum omp_clause_depend_kind depend_kind;
1623 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1624 unsigned int map_kind;
1625 enum omp_clause_proc_bind_kind proc_bind_kind;
1626 enum tree_code reduction_code;
1627 enum omp_clause_linear_kind linear_kind;
1628 enum tree_code if_modifier;
1629 enum omp_clause_defaultmap_kind defaultmap_kind;
1630 enum omp_clause_bind_kind bind_kind;
1631 enum omp_clause_device_type_kind device_type_kind;
1632 } GTY ((skip)) subcode;
1633
1634 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1635 usage. */
1636 gimple_seq gimple_reduction_init;
1637 gimple_seq gimple_reduction_merge;
1638
1639 tree GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1640 ops[1];
1641};
1642
1643struct GTY(()) tree_block {
1644 struct tree_base base;
1645 tree chain;
1646
1647 unsigned block_num;
1648
1649 location_t locus;
1650 location_t end_locus;
1651
1652 tree vars;
1653 vec<tree, va_gc> *nonlocalized_vars;
1654
1655 tree subblocks;
1656 tree supercontext;
1657 tree abstract_origin;
1658 tree fragment_origin;
1659 tree fragment_chain;
1660
1661 /* Pointer to the DWARF lexical block. */
1662 struct die_struct *die;
1663};
1664
1665struct GTY(()) tree_type_common {
1666 struct tree_common common;
1667 tree size;
1668 tree size_unit;
1669 tree attributes;
1670 unsigned int uid;
1671
1672 unsigned int precision : 10;
1673 unsigned no_force_blk_flag : 1;
1674 unsigned needs_constructing_flag : 1;
1675 unsigned transparent_aggr_flag : 1;
1676 unsigned restrict_flag : 1;
1677 unsigned contains_placeholder_bits : 2;
1678
1679 ENUM_BITFIELD(machine_mode) mode : 8;
1680
1681 /* TYPE_STRING_FLAG for INTEGER_TYPE and ARRAY_TYPE.
1682 TYPE_CXX_ODR_P for RECORD_TYPE and UNION_TYPE. */
1683 unsigned string_flag : 1;
1684 unsigned lang_flag_0 : 1;
1685 unsigned lang_flag_1 : 1;
1686 unsigned lang_flag_2 : 1;
1687 unsigned lang_flag_3 : 1;
1688 unsigned lang_flag_4 : 1;
1689 unsigned lang_flag_5 : 1;
1690 unsigned lang_flag_6 : 1;
1691 unsigned lang_flag_7 : 1;
1692
1693 /* TYPE_ALIGN in log2; this has to be large enough to hold values
1694 of the maximum of BIGGEST_ALIGNMENT and MAX_OFILE_ALIGNMENT,
1695 the latter being usually the larger. For ELF it is 8<<28,
1696 so we need to store the value 32 (not 31, as we need the zero
1697 as well), hence six bits. */
1698 unsigned align : 6;
1699 unsigned warn_if_not_align : 6;
1700 unsigned typeless_storage : 1;
1701 unsigned empty_flag : 1;
1702 unsigned indivisible_p : 1;
1703 unsigned spare : 16;
1704
1705 alias_set_type alias_set;
1706 tree pointer_to;
1707 tree reference_to;
1708 union tree_type_symtab {
1709 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address;
1710 struct die_struct * GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die;
1711 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab;
1712 tree canonical;
1713 tree next_variant;
1714 tree main_variant;
1715 tree context;
1716 tree name;
1717};
1718
1719struct GTY(()) tree_type_with_lang_specific {
1720 struct tree_type_common common;
1721 /* Points to a structure whose details depend on the language in use. */
1722 struct lang_type *lang_specific;
1723};
1724
1725struct GTY(()) tree_type_non_common {
1726 struct tree_type_with_lang_specific with_lang_specific;
1727 tree values;
1728 tree minval;
1729 tree maxval;
1730 tree lang_1;
1731};
1732
1733struct GTY (()) tree_binfo {
1734 struct tree_common common;
1735
1736 tree offset;
1737 tree vtable;
1738 tree virtuals;
1739 tree vptr_field;
1740 vec<tree, va_gc> *base_accesses;
1741 tree inheritance;
1742
1743 tree vtt_subvtt;
1744 tree vtt_vptr;
1745
1746 vec<tree, va_gc> base_binfos;
1747};
1748
1749struct GTY(()) tree_decl_minimal {
1750 struct tree_common common;
1751 location_t locus;
1752 unsigned int uid;
1753 tree name;
1754 tree context;
1755};
1756
1757struct GTY(()) tree_decl_common {
1758 struct tree_decl_minimal common;
1759 tree size;
1760
1761 ENUM_BITFIELD(machine_mode) mode : 8;
1762
1763 unsigned nonlocal_flag : 1;
1764 unsigned virtual_flag : 1;
1765 unsigned ignored_flag : 1;
1766 unsigned abstract_flag : 1;
1767 unsigned artificial_flag : 1;
1768 unsigned preserve_flag: 1;
1769 unsigned debug_expr_is_from : 1;
1770
1771 unsigned lang_flag_0 : 1;
1772 unsigned lang_flag_1 : 1;
1773 unsigned lang_flag_2 : 1;
1774 unsigned lang_flag_3 : 1;
1775 unsigned lang_flag_4 : 1;
1776 unsigned lang_flag_5 : 1;
1777 unsigned lang_flag_6 : 1;
1778 unsigned lang_flag_7 : 1;
1779 unsigned lang_flag_8 : 1;
1780
1781 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER
1782 In TRANSLATION_UNIT_DECL, this is TRANSLATION_UNIT_WARN_EMPTY_P.
1783 In FIELD_DECL, this is DECL_FIELD_ABI_IGNORED. */
1784 unsigned decl_flag_0 : 1;
1785 /* In FIELD_DECL, this is DECL_BIT_FIELD
1786 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1787 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1788 unsigned decl_flag_1 : 1;
1789 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1790 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1791 DECL_HAS_VALUE_EXPR_P. */
1792 unsigned decl_flag_2 : 1;
1793 /* In FIELD_DECL, this is DECL_PADDING_P. */
1794 unsigned decl_flag_3 : 1;
1795 /* Logically, these two would go in a theoretical base shared by var and
1796 parm decl. */
1797 unsigned not_gimple_reg_flag : 1;
1798 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1799 unsigned decl_by_reference_flag : 1;
1800 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1801 unsigned decl_read_flag : 1;
1802 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1803 /* In a PARM_DECL, this is DECL_HIDDEN_STRING_LENGTH. */
1804 unsigned decl_nonshareable_flag : 1;
1805
1806 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1807 unsigned int off_align : 6;
1808
1809 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1810 unsigned int align : 6;
1811
1812 /* DECL_WARN_IF_NOT_ALIGN. It should have the same size as
1813 TYPE_WARN_IF_NOT_ALIGN. */
1814 unsigned int warn_if_not_align : 6;
1815
1816 /* 14 bits unused. */
1817
1818 /* UID for points-to sets, stable over copying from inlining. */
1819 unsigned int pt_uid;
1820
1821 tree size_unit;
1822 tree initial;
1823 tree attributes;
1824 tree abstract_origin;
1825
1826 /* Points to a structure whose details depend on the language in use. */
1827 struct lang_decl *lang_specific;
1828};
1829
1830struct GTY(()) tree_decl_with_rtl {
1831 struct tree_decl_common common;
1832 rtx rtl;
1833};
1834
1835struct GTY(()) tree_field_decl {
1836 struct tree_decl_common common;
1837
1838 tree offset;
1839 tree bit_field_type;
1840 tree qualifier;
1841 tree bit_offset;
1842 tree fcontext;
1843};
1844
1845struct GTY(()) tree_label_decl {
1846 struct tree_decl_with_rtl common;
1847 int label_decl_uid;
1848 int eh_landing_pad_nr;
1849};
1850
1851struct GTY(()) tree_result_decl {
1852 struct tree_decl_with_rtl common;
1853};
1854
1855struct GTY(()) tree_const_decl {
1856 struct tree_decl_common common;
1857};
1858
1859struct GTY(()) tree_parm_decl {
1860 struct tree_decl_with_rtl common;
1861 rtx incoming_rtl;
1862};
1863
1864struct GTY(()) tree_decl_with_vis {
1865 struct tree_decl_with_rtl common;
1866 tree assembler_name;
1867 struct symtab_node *symtab_node;
1868
1869 /* Belong to VAR_DECL exclusively. */
1870 unsigned defer_output : 1;
1871 unsigned hard_register : 1;
1872 unsigned common_flag : 1;
1873 unsigned in_text_section : 1;
1874 unsigned in_constant_pool : 1;
1875 unsigned dllimport_flag : 1;
1876 /* Don't belong to VAR_DECL exclusively. */
1877 unsigned weak_flag : 1;
1878
1879 unsigned seen_in_bind_expr : 1;
1880 unsigned comdat_flag : 1;
1881 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1882 ENUM_BITFIELD(symbol_visibility) visibility : 2;
1883 unsigned visibility_specified : 1;
1884
1885 /* Belong to FUNCTION_DECL exclusively. */
1886 unsigned init_priority_p : 1;
1887 /* Used by C++ only. Might become a generic decl flag. */
1888 unsigned shadowed_for_var_p : 1;
1889 /* Belong to FUNCTION_DECL exclusively. */
1890 unsigned cxx_constructor : 1;
1891 /* Belong to FUNCTION_DECL exclusively. */
1892 unsigned cxx_destructor : 1;
1893 /* Belong to FUNCTION_DECL exclusively. */
1894 unsigned final : 1;
1895 /* Belong to FUNCTION_DECL exclusively. */
1896 unsigned regdecl_flag : 1;
1897 /* 14 unused bits. */
1898 /* 32 more unused on 64 bit HW. */
1899};
1900
1901struct GTY(()) tree_var_decl {
1902 struct tree_decl_with_vis common;
1903};
1904
1905struct GTY(()) tree_decl_non_common {
1906 struct tree_decl_with_vis common;
1907 /* Almost all FE's use this. */
1908 tree result;
1909};
1910
1911/* Classify a special function declaration type. */
1912
1913enum function_decl_type
1914{
1915 NONE,
1916 OPERATOR_NEW,
1917 OPERATOR_DELETE,
1918 LAMBDA_FUNCTION
1919
1920 /* 0 values left */
1921};
1922
1923/* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1924 arguments/result/saved_tree fields by front ends. It was either inherit
1925 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1926 which seemed a bit strange. */
1927
1928struct GTY(()) tree_function_decl {
1929 struct tree_decl_non_common common;
1930
1931 struct function *f;
1932
1933 /* Arguments of the function. */
1934 tree arguments;
1935 /* The personality function. Used for stack unwinding. */
1936 tree personality;
1937
1938 /* Function specific options that are used by this function. */
1939 tree function_specific_target; /* target options */
1940 tree function_specific_optimization; /* optimization options */
1941
1942 /* Generic function body. */
1943 tree saved_tree;
1944 /* Index within a virtual table. */
1945 tree vindex;
1946
1947 /* In a FUNCTION_DECL this is DECL_UNCHECKED_FUNCTION_CODE. */
1948 unsigned int function_code;
1949
1950 ENUM_BITFIELD(built_in_class) built_in_class : 2;
1951 unsigned static_ctor_flag : 1;
1952 unsigned static_dtor_flag : 1;
1953 unsigned uninlinable : 1;
1954 unsigned possibly_inlined : 1;
1955 unsigned novops_flag : 1;
1956 unsigned returns_twice_flag : 1;
1957
1958 unsigned malloc_flag : 1;
1959 unsigned declared_inline_flag : 1;
1960 unsigned no_inline_warning_flag : 1;
1961 unsigned no_instrument_function_entry_exit : 1;
1962 unsigned no_limit_stack : 1;
1963 unsigned disregard_inline_limits : 1;
1964 unsigned pure_flag : 1;
1965 unsigned looping_const_or_pure_flag : 1;
1966
1967 /* Align the bitfield to boundary of a byte. */
1968 ENUM_BITFIELD(function_decl_type) decl_type: 2;
1969 unsigned has_debug_args_flag : 1;
1970 unsigned versioned_function : 1;
1971 unsigned replaceable_operator : 1;
1972
1973 /* 11 bits left for future expansion. */
1974 /* 32 bits on 64-bit HW. */
1975};
1976
1977struct GTY(()) tree_translation_unit_decl {
1978 struct tree_decl_common common;
1979 /* Source language of this translation unit. Used for DWARF output. */
1980 const char *language;
1981 /* TODO: Non-optimization used to build this translation unit. */
1982 /* TODO: Root of a partial DWARF tree for global types and decls. */
1983};
1984
1985struct GTY(()) tree_type_decl {
1986 struct tree_decl_non_common common;
1987
1988};
1989
1990struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1991 {
1992 struct tree_statement_list_node *prev;
1993 struct tree_statement_list_node *next;
1994 tree stmt;
1995};
1996
1997struct GTY(()) tree_statement_list
1998 {
1999 struct tree_typed typed;
2000 struct tree_statement_list_node *head;
2001 struct tree_statement_list_node *tail;
2002};
2003
2004
2005/* Optimization options used by a function. */
2006
2007struct GTY(()) tree_optimization_option {
2008 struct tree_base base;
2009
2010 /* The optimization options used by the user. */
2011 struct cl_optimization *opts;
2012
2013 /* Target optabs for this set of optimization options. This is of
2014 type `struct target_optabs *'. */
2015 void *GTY ((atomic)) optabs;
2016
2017 /* The value of this_target_optabs against which the optabs above were
2018 generated. */
2019 struct target_optabs *GTY ((skip)) base_optabs;
2020};
2021
2022/* Forward declaration, defined in target-globals.h. */
2023
2024class GTY(()) target_globals;
2025
2026/* Target options used by a function. */
2027
2028struct GTY(()) tree_target_option {
2029 struct tree_base base;
2030
2031 /* Target globals for the corresponding target option. */
2032 class target_globals *globals;
2033
2034 /* The optimization options used by the user. */
2035 struct cl_target_option *opts;
2036};
2037
2038/* Define the overall contents of a tree node.
2039 It may be any of the structures declared above
2040 for various types of node. */
2041union GTY ((ptr_alias (union lang_tree_node),
2042 desc ("tree_node_structure (&%h)"), variable_size)) tree_node {
2043 struct tree_base GTY ((tag ("TS_BASE"))) base;
2044 struct tree_typed GTY ((tag ("TS_TYPED"))) typed;
2045 struct tree_common GTY ((tag ("TS_COMMON"))) common;
2046 struct tree_int_cst GTY ((tag ("TS_INT_CST"))) int_cst;
2047 struct tree_poly_int_cst GTY ((tag ("TS_POLY_INT_CST"))) poly_int_cst;
2048 struct tree_real_cst GTY ((tag ("TS_REAL_CST"))) real_cst;
2049 struct tree_fixed_cst GTY ((tag ("TS_FIXED_CST"))) fixed_cst;
2050 struct tree_vector GTY ((tag ("TS_VECTOR"))) vector;
2051 struct tree_string GTY ((tag ("TS_STRING"))) string;
2052 struct tree_complex GTY ((tag ("TS_COMPLEX"))) complex;
2053 struct tree_identifier GTY ((tag ("TS_IDENTIFIER"))) identifier;
2054 struct tree_decl_minimal GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal;
2055 struct tree_decl_common GTY ((tag ("TS_DECL_COMMON"))) decl_common;
2056 struct tree_decl_with_rtl GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl;
2057 struct tree_decl_non_common GTY ((tag ("TS_DECL_NON_COMMON")))
2058 decl_non_common;
2059 struct tree_parm_decl GTY ((tag ("TS_PARM_DECL"))) parm_decl;
2060 struct tree_decl_with_vis GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis;
2061 struct tree_var_decl GTY ((tag ("TS_VAR_DECL"))) var_decl;
2062 struct tree_field_decl GTY ((tag ("TS_FIELD_DECL"))) field_decl;
2063 struct tree_label_decl GTY ((tag ("TS_LABEL_DECL"))) label_decl;
2064 struct tree_result_decl GTY ((tag ("TS_RESULT_DECL"))) result_decl;
2065 struct tree_const_decl GTY ((tag ("TS_CONST_DECL"))) const_decl;
2066 struct tree_type_decl GTY ((tag ("TS_TYPE_DECL"))) type_decl;
2067 struct tree_function_decl GTY ((tag ("TS_FUNCTION_DECL"))) function_decl;
2068 struct tree_translation_unit_decl GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
2069 translation_unit_decl;
2070 struct tree_type_common GTY ((tag ("TS_TYPE_COMMON"))) type_common;
2071 struct tree_type_with_lang_specific GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
2072 type_with_lang_specific;
2073 struct tree_type_non_common GTY ((tag ("TS_TYPE_NON_COMMON")))
2074 type_non_common;
2075 struct tree_list GTY ((tag ("TS_LIST"))) list;
2076 struct tree_vec GTY ((tag ("TS_VEC"))) vec;
2077 struct tree_exp GTY ((tag ("TS_EXP"))) exp;
2078 struct tree_ssa_name GTY ((tag ("TS_SSA_NAME"))) ssa_name;
2079 struct tree_block GTY ((tag ("TS_BLOCK"))) block;
2080 struct tree_binfo GTY ((tag ("TS_BINFO"))) binfo;
2081 struct tree_statement_list GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list;
2082 struct tree_constructor GTY ((tag ("TS_CONSTRUCTOR"))) constructor;
2083 struct tree_omp_clause GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause;
2084 struct tree_optimization_option GTY ((tag ("TS_OPTIMIZATION"))) optimization;
2085 struct tree_target_option GTY ((tag ("TS_TARGET_OPTION"))) target_option;
2086};
2087
2088/* Structure describing an attribute and a function to handle it. */
2089struct attribute_spec {
2090 /* The name of the attribute (without any leading or trailing __),
2091 or NULL to mark the end of a table of attributes. */
2092 const char *name;
2093 /* The minimum length of the list of arguments of the attribute. */
2094 int min_length;
2095 /* The maximum length of the list of arguments of the attribute
2096 (-1 for no maximum). It can also be -2 for fake attributes
2097 created for the sake of -Wno-attributes; in that case, we
2098 should skip the balanced token sequence when parsing the attribute. */
2099 int max_length;
2100 /* Whether this attribute requires a DECL. If it does, it will be passed
2101 from types of DECLs, function return types and array element types to
2102 the DECLs, function types and array types respectively; but when
2103 applied to a type in any other circumstances, it will be ignored with
2104 a warning. (If greater control is desired for a given attribute,
2105 this should be false, and the flags argument to the handler may be
2106 used to gain greater control in that case.) */
2107 bool decl_required;
2108 /* Whether this attribute requires a type. If it does, it will be passed
2109 from a DECL to the type of that DECL. */
2110 bool type_required;
2111 /* Whether this attribute requires a function (or method) type. If it does,
2112 it will be passed from a function pointer type to the target type,
2113 and from a function return type (which is not itself a function
2114 pointer type) to the function type. */
2115 bool function_type_required;
2116 /* Specifies if attribute affects type's identity. */
2117 bool affects_type_identity;
2118 /* Function to handle this attribute. NODE points to a tree[3] array,
2119 where node[0] is the node to which the attribute is to be applied;
2120 node[1] is the last pushed/merged declaration if one exists, and node[2]
2121 may be the declaration for node[0]. If a DECL, it should be modified in
2122 place; if a TYPE, a copy should be created. NAME is the canonicalized
2123 name of the attribute i.e. without any leading or trailing underscores.
2124 ARGS is the TREE_LIST of the arguments (which may be NULL). FLAGS gives
2125 further information about the context of the attribute. Afterwards, the
2126 attributes will be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as
2127 appropriate, unless *NO_ADD_ATTRS is set to true (which should be done on
2128 error, as well as in any other cases when the attributes should not be
2129 added to the DECL or TYPE). Depending on FLAGS, any attributes to be
2130 applied to another type or DECL later may be returned;
2131 otherwise the return value should be NULL_TREE. This pointer may be
2132 NULL if no special handling is required beyond the checks implied
2133 by the rest of this structure. */
2134 tree (*handler) (tree *node, tree name, tree args,
2135 int flags, bool *no_add_attrs);
2136
2137 /* Specifies the name of an attribute that's mutually exclusive with
2138 this one, and whether the relationship applies to the function,
2139 variable, or type form of the attribute. */
2140 struct exclusions {
2141 const char *name;
2142 bool function;
2143 bool variable;
2144 bool type;
2145 };
2146
2147 /* An array of attribute exclusions describing names of other attributes
2148 that this attribute is mutually exclusive with. */
2149 const exclusions *exclude;
2150};
2151
2152/* These functions allow a front-end to perform a manual layout of a
2153 RECORD_TYPE. (For instance, if the placement of subsequent fields
2154 depends on the placement of fields so far.) Begin by calling
2155 start_record_layout. Then, call place_field for each of the
2156 fields. Then, call finish_record_layout. See layout_type for the
2157 default way in which these functions are used. */
2158typedef struct record_layout_info_s {
2159 /* The RECORD_TYPE that we are laying out. */
2160 tree t;
2161 /* The offset into the record so far, in bytes, not including bits in
2162 BITPOS. */
2163 tree offset;
2164 /* The last known alignment of SIZE. */
2165 unsigned int offset_align;
2166 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
2167 tree bitpos;
2168 /* The alignment of the record so far, in bits. */
2169 unsigned int record_align;
2170 /* The alignment of the record so far, ignoring #pragma pack and
2171 __attribute__ ((packed)), in bits. */
2172 unsigned int unpacked_align;
2173 /* The previous field laid out. */
2174 tree prev_field;
2175 /* The static variables (i.e., class variables, as opposed to
2176 instance variables) encountered in T. */
2177 vec<tree, va_gc> *pending_statics;
2178 /* Bits remaining in the current alignment group */
2179 int remaining_in_alignment;
2180 /* True if we've seen a packed field that didn't have normal
2181 alignment anyway. */
2182 int packed_maybe_necessary;
2183} *record_layout_info;
2184
2185/* Iterator for going through the function arguments. */
2186struct function_args_iterator {
2187 tree next; /* TREE_LIST pointing to the next argument */
2188};
2189
2190/* Structures to map from a tree to another tree. */
2191struct GTY(()) tree_map_base {
2192 tree from;
2193};
2194
2195/* Map from a tree to another tree. */
2196
2197struct GTY((for_user)) tree_map {
2198 struct tree_map_base base;
2199 unsigned int hash;
2200 tree to;
2201};
2202
2203/* Map from a decl tree to another tree. */
2204struct GTY((for_user)) tree_decl_map {
2205 struct tree_map_base base;
2206 tree to;
2207};
2208
2209/* Map from a tree to an int. */
2210struct GTY((for_user)) tree_int_map {
2211 struct tree_map_base base;
2212 unsigned int to;
2213};
2214
2215/* Map from a decl tree to a tree vector. */
2216struct GTY((for_user)) tree_vec_map {
2217 struct tree_map_base base;
2218 vec<tree, va_gc> *to;
2219};
2220
2221/* Abstract iterators for CALL_EXPRs. These static inline definitions
2222 have to go towards the end of tree.h so that union tree_node is fully
2223 defined by this point. */
2224
2225/* Structure containing iterator state. */
2226struct call_expr_arg_iterator {
2227 tree t; /* the call_expr */
2228 int n; /* argument count */
2229 int i; /* next argument index */
2230};
2231
2232struct const_call_expr_arg_iterator {
2233 const_tree t; /* the call_expr */
2234 int n; /* argument count */
2235 int i; /* next argument index */
2236};
2237
2238/* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
2239 function, and flags. */
2240struct GTY(()) builtin_info_type {
2241 tree decl;
2242 /* Whether the user can use <xxx> instead of explicitly using calls
2243 to __builtin_<xxx>. */
2244 unsigned implicit_p : 1;
2245 /* Whether the user has provided a declaration of <xxx>. */
2246 unsigned declared_p : 1;
2247};
2248
2249/* Information about a _FloatN or _FloatNx type that may be
2250 supported. */
2251struct floatn_type_info {
2252 /* The number N in the type name. */
2253 int n;
2254 /* Whether it is an extended type _FloatNx (true) or an interchange
2255 type (false). */
2256 bool extended;
2257};
2258
2259
2260/*---------------------------------------------------------------------------
2261 Global variables
2262---------------------------------------------------------------------------*/
2263/* Matrix describing the structures contained in a given tree code. */
2264extern bool tree_contains_struct[MAX_TREE_CODES][64];
2265
2266/* Class of tree given its code. */
2267extern const enum tree_code_class tree_code_type[];
2268
2269/* Each tree code class has an associated string representation.
2270 These must correspond to the tree_code_class entries. */
2271extern const char *const tree_code_class_strings[];
2272
2273/* Number of argument-words in each kind of tree-node. */
2274extern const unsigned char tree_code_length[];
2275
2276/* Vector of all alias pairs for global symbols. */
2277extern GTY(()) vec<alias_pair, va_gc> *alias_pairs;
2278
2279/* Names of all the built_in classes. */
2280extern const char *const built_in_class_names[BUILT_IN_LAST];
2281
2282/* Names of all the built_in functions. */
2283extern const char * built_in_names[(int) END_BUILTINS];
2284
2285/* Number of operands and names for each OMP_CLAUSE node. */
2286extern unsigned const char omp_clause_num_ops[];
2287extern const char * const omp_clause_code_name[];
2288extern const char *user_omp_clause_code_name (tree, bool);
2289
2290/* A vector of all translation-units. */
2291extern GTY (()) vec<tree, va_gc> *all_translation_units;
2292
2293/* Vector of standard trees used by the C compiler. */
2294extern GTY(()) tree global_trees[TI_MAX];
2295
2296/* The standard C integer types. Use integer_type_kind to index into
2297 this array. */
2298extern GTY(()) tree integer_types[itk_none];
2299
2300/* Types used to represent sizes. */
2301extern GTY(()) tree sizetype_tab[(int) stk_type_kind_last];
2302
2303/* Arrays for keeping track of tree node statistics. */
2304extern uint64_t tree_node_counts[];
2305extern uint64_t tree_node_sizes[];
2306
2307/* True if we are in gimple form and the actions of the folders need to
2308 be restricted. False if we are not in gimple form and folding is not
2309 restricted to creating gimple expressions. */
2310extern bool in_gimple_form;
2311
2312/* Functional interface to the builtin functions. */
2313extern GTY(()) builtin_info_type builtin_info[(int)END_BUILTINS];
2314
2315/* If nonzero, an upper limit on alignment of structure fields, in bits, */
2316extern unsigned int maximum_field_alignment;
2317
2318/* Points to the FUNCTION_DECL of the function whose body we are reading. */
2319extern GTY(()) tree current_function_decl;
2320
2321/* Nonzero means a FUNC_BEGIN label was emitted. */
2322extern GTY(()) const char * current_function_func_begin_label;
2323
2324/* Information about the _FloatN and _FloatNx types. */
2325extern const floatn_type_info floatn_nx_types[NUM_FLOATN_NX_TYPES];
2326
2327#endif // GCC_TREE_CORE_H
2328

source code of gcc/tree-core.h