1/* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2023 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 die_struct;
37
38
39/*---------------------------------------------------------------------------
40 #defined constants
41---------------------------------------------------------------------------*/
42/* Nonzero if this is a call to a function whose return value depends
43 solely on its arguments, has no side effects, and does not read
44 global memory. This corresponds to TREE_READONLY for function
45 decls. */
46#define ECF_CONST (1 << 0)
47
48/* Nonzero if this is a call to "pure" function (like const function,
49 but may read memory. This corresponds to DECL_PURE_P for function
50 decls. */
51#define ECF_PURE (1 << 1)
52
53/* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no
54 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P
55 for function decls.*/
56#define ECF_LOOPING_CONST_OR_PURE (1 << 2)
57
58/* Nonzero if this call will never return. */
59#define ECF_NORETURN (1 << 3)
60
61/* Nonzero if this is a call to malloc or a related function. */
62#define ECF_MALLOC (1 << 4)
63
64/* Nonzero if it is plausible that this is a call to alloca. */
65#define ECF_MAY_BE_ALLOCA (1 << 5)
66
67/* Nonzero if this is a call to a function that won't throw an exception. */
68#define ECF_NOTHROW (1 << 6)
69
70/* Nonzero if this is a call to setjmp or a related function. */
71#define ECF_RETURNS_TWICE (1 << 7)
72
73/* Nonzero if this call replaces the current stack frame. */
74#define ECF_SIBCALL (1 << 8)
75
76/* Function does not read or write memory (but may have side effects, so
77 it does not necessarily fit ECF_CONST). */
78#define ECF_NOVOPS (1 << 9)
79
80/* The function does not lead to calls within current function unit. */
81#define ECF_LEAF (1 << 10)
82
83/* Nonzero if this call returns its first argument. */
84#define ECF_RET1 (1 << 11)
85
86/* Nonzero if this call does not affect transactions. */
87#define ECF_TM_PURE (1 << 12)
88
89/* Nonzero if this call is into the transaction runtime library. */
90#define ECF_TM_BUILTIN (1 << 13)
91
92/* Nonzero if this is an indirect call by descriptor. */
93#define ECF_BY_DESCRIPTOR (1 << 14)
94
95/* Nonzero if this is a cold function. */
96#define ECF_COLD (1 << 15)
97
98/* Nonzero if this is a function expected to end with an exception. */
99#define ECF_XTHROW (1 << 16)
100
101/* Call argument flags. */
102
103/* Nonzero if the argument is not used by the function. */
104#define EAF_UNUSED (1 << 1)
105
106/* Following flags come in pairs. First one is about direct dereferences
107 from the parameter, while the second is about memory reachable by
108 recursive dereferences. */
109
110/* Nonzero if memory reached by the argument is not clobbered. */
111#define EAF_NO_DIRECT_CLOBBER (1 << 2)
112#define EAF_NO_INDIRECT_CLOBBER (1 << 3)
113
114/* Nonzero if the argument does not escape. */
115#define EAF_NO_DIRECT_ESCAPE (1 << 4)
116#define EAF_NO_INDIRECT_ESCAPE (1 << 5)
117
118/* Nonzero if the argument does not escape to return value. */
119#define EAF_NOT_RETURNED_DIRECTLY (1 << 6)
120#define EAF_NOT_RETURNED_INDIRECTLY (1 << 7)
121
122/* Nonzero if the argument is not read. */
123#define EAF_NO_DIRECT_READ (1 << 8)
124#define EAF_NO_INDIRECT_READ (1 << 9)
125
126/* Call return flags. */
127/* Mask for the argument number that is returned. Lower two bits of
128 the return flags, encodes argument slots zero to three. */
129#define ERF_RETURN_ARG_MASK (3)
130
131/* Nonzero if the return value is equal to the argument number
132 flags & ERF_RETURN_ARG_MASK. */
133#define ERF_RETURNS_ARG (1 << 2)
134
135/* Nonzero if the return value does not alias with anything. Functions
136 with the malloc attribute have this set on their return value. */
137#define ERF_NOALIAS (1 << 3)
138
139
140/*---------------------------------------------------------------------------
141 Enumerations
142---------------------------------------------------------------------------*/
143/* Codes of tree nodes. */
144#define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
145#define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
146
147enum tree_code {
148#include "all-tree.def"
149MAX_TREE_CODES
150};
151
152#undef DEFTREECODE
153#undef END_OF_BASE_TREE_CODES
154
155/* Number of language-independent tree codes. */
156#define NUM_TREE_CODES \
157 ((int) LAST_AND_UNUSED_TREE_CODE)
158
159#define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
160 (tree_contains_struct[(CODE)][(STRUCT)])
161
162
163/* Classify which part of the compiler has defined a given builtin function.
164 Note that we assume below that this is no more than two bits. */
165enum built_in_class {
166 NOT_BUILT_IN = 0,
167 BUILT_IN_FRONTEND,
168 BUILT_IN_MD,
169 BUILT_IN_NORMAL
170};
171
172/* Last marker used for LTO stremaing of built_in_class. We cannot add it
173 to the enum since we need the enumb to fit in 2 bits. */
174#define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
175
176/* Codes that identify the various built in functions
177 so that expand_call can identify them quickly. */
178#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
179enum built_in_function {
180#include "builtins.def"
181 /* Complex division routines in libgcc. These are done via builtins
182 because emit_library_call_value can't handle complex values. */
183 BUILT_IN_COMPLEX_MUL_MIN,
184 BUILT_IN_COMPLEX_MUL_MAX
185 = BUILT_IN_COMPLEX_MUL_MIN
186 + MAX_MODE_COMPLEX_FLOAT
187 - MIN_MODE_COMPLEX_FLOAT,
188
189 BUILT_IN_COMPLEX_DIV_MIN,
190 BUILT_IN_COMPLEX_DIV_MAX
191 = BUILT_IN_COMPLEX_DIV_MIN
192 + MAX_MODE_COMPLEX_FLOAT
193 - MIN_MODE_COMPLEX_FLOAT,
194
195 /* Upper bound on non-language-specific builtins. */
196 END_BUILTINS
197};
198
199/* Internal functions. */
200enum internal_fn {
201#define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
202#include "internal-fn.def"
203 IFN_LAST
204};
205
206/* An enum that combines target-independent built-in functions with
207 internal functions, so that they can be treated in a similar way.
208 The numbers for built-in functions are the same as for the
209 built_in_function enum. The numbers for internal functions
210 start at END_BUITLINS. */
211enum combined_fn {
212#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
213 CFN_##ENUM = int (ENUM),
214#include "builtins.def"
215
216
217#define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) \
218 CFN_##CODE = int (END_BUILTINS) + int (IFN_##CODE),
219#include "internal-fn.def"
220
221 CFN_LAST
222};
223
224/* Tree code classes. Each tree_code has an associated code class
225 represented by a TREE_CODE_CLASS. */
226enum tree_code_class {
227 tcc_exceptional, /* An exceptional code (fits no category). */
228 tcc_constant, /* A constant. */
229 /* Order of tcc_type and tcc_declaration is important. */
230 tcc_type, /* A type object code. */
231 tcc_declaration, /* A declaration (also serving as variable refs). */
232 tcc_reference, /* A reference to storage. */
233 tcc_comparison, /* A comparison expression. */
234 tcc_unary, /* A unary arithmetic expression. */
235 tcc_binary, /* A binary arithmetic expression. */
236 tcc_statement, /* A statement expression, which have side effects
237 but usually no interesting value. */
238 tcc_vl_exp, /* A function call or other expression with a
239 variable-length operand vector. */
240 tcc_expression /* Any other expression. */
241};
242
243/* OMP_CLAUSE codes. Do not reorder, as this is used to index into
244 the tables omp_clause_num_ops and omp_clause_code_name. */
245enum omp_clause_code {
246 /* Clause zero is special-cased inside the parser
247 (c_parser_omp_variable_list). */
248 OMP_CLAUSE_ERROR = 0,
249
250 /* OpenACC/OpenMP clause: private (variable_list). */
251 OMP_CLAUSE_PRIVATE,
252
253 /* OpenMP clause: shared (variable_list). */
254 OMP_CLAUSE_SHARED,
255
256 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
257 OMP_CLAUSE_FIRSTPRIVATE,
258
259 /* OpenMP clause: lastprivate (variable_list). */
260 OMP_CLAUSE_LASTPRIVATE,
261
262 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
263 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
264 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
265 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
266 into the shared one.
267 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
268 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
269 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
270 VAR_DECL placeholder, used like the above for C/C++ array
271 reductions. */
272 OMP_CLAUSE_REDUCTION,
273
274 /* OpenMP clause: task_reduction (operator:variable_list). */
275 OMP_CLAUSE_TASK_REDUCTION,
276
277 /* OpenMP clause: in_reduction (operator:variable_list). */
278 OMP_CLAUSE_IN_REDUCTION,
279
280 /* OpenMP clause: copyin (variable_list). */
281 OMP_CLAUSE_COPYIN,
282
283 /* OpenMP clause: copyprivate (variable_list). */
284 OMP_CLAUSE_COPYPRIVATE,
285
286 /* OpenMP clause: linear (variable-list[:linear-step]). */
287 OMP_CLAUSE_LINEAR,
288
289 /* OpenMP clause: affinity([depend-modifier :] variable-list). */
290 OMP_CLAUSE_AFFINITY,
291
292 /* OpenMP clause: aligned (variable-list[:alignment]). */
293 OMP_CLAUSE_ALIGNED,
294
295 /* OpenMP clause: allocate ([allocator:]variable-list). */
296 OMP_CLAUSE_ALLOCATE,
297
298 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
299 OMP_CLAUSE_DEPEND,
300
301 /* OpenMP clause: nontemporal (variable-list). */
302 OMP_CLAUSE_NONTEMPORAL,
303
304 /* OpenMP clause: uniform (argument-list). */
305 OMP_CLAUSE_UNIFORM,
306
307 /* OpenMP clause: enter (extended-list).
308 to is a deprecated alias when it appears in declare target. */
309 OMP_CLAUSE_ENTER,
310
311 /* OpenMP clause: link (variable-list). */
312 OMP_CLAUSE_LINK,
313
314 /* OpenMP clause: detach (event-handle). */
315 OMP_CLAUSE_DETACH,
316
317 /* OpenACC clause: use_device (variable-list).
318 OpenMP clause: use_device_ptr (ptr-list). */
319 OMP_CLAUSE_USE_DEVICE_PTR,
320
321 /* OpenMP clause: use_device_addr (variable-list). */
322 OMP_CLAUSE_USE_DEVICE_ADDR,
323
324 /* OpenMP clause: is_device_ptr (variable-list). */
325 OMP_CLAUSE_IS_DEVICE_PTR,
326
327 /* OpenMP clause: inclusive (variable-list). */
328 OMP_CLAUSE_INCLUSIVE,
329
330 /* OpenMP clause: exclusive (variable-list). */
331 OMP_CLAUSE_EXCLUSIVE,
332
333 /* OpenMP clause: from (variable-list). */
334 OMP_CLAUSE_FROM,
335
336 /* OpenMP clause: to (variable-list). */
337 OMP_CLAUSE_TO,
338
339 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
340 device, host (self), present, present_or_copy (pcopy), present_or_copyin
341 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
342 (variable-list).
343
344 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
345 OMP_CLAUSE_MAP,
346
347 /* OpenMP clause: has_device_addr (variable-list). */
348 OMP_CLAUSE_HAS_DEVICE_ADDR,
349
350 /* OpenMP clause: doacross ({source,sink}:vec). */
351 OMP_CLAUSE_DOACROSS,
352
353 /* OpenMP clause: indirect [(constant-integer-expression)]. */
354 OMP_CLAUSE_INDIRECT,
355
356 /* Internal structure to hold OpenACC cache directive's variable-list.
357 #pragma acc cache (variable-list). */
358 OMP_CLAUSE__CACHE_,
359
360 /* OpenACC clause: gang [(gang-argument-list)].
361 Where
362 gang-argument-list: [gang-argument-list, ] gang-argument
363 gang-argument: [num:] integer-expression
364 | static: size-expression
365 size-expression: * | integer-expression. */
366 OMP_CLAUSE_GANG,
367
368 /* OpenACC clause: async [(integer-expression)]. */
369 OMP_CLAUSE_ASYNC,
370
371 /* OpenACC clause: wait [(integer-expression-list)]. */
372 OMP_CLAUSE_WAIT,
373
374 /* OpenACC clause: auto. */
375 OMP_CLAUSE_AUTO,
376
377 /* OpenACC clause: seq. */
378 OMP_CLAUSE_SEQ,
379
380 /* Internal clause: temporary for combined loops expansion. */
381 OMP_CLAUSE__LOOPTEMP_,
382
383 /* Internal clause: temporary for task reductions. */
384 OMP_CLAUSE__REDUCTEMP_,
385
386 /* Internal clause: temporary for lastprivate(conditional:). */
387 OMP_CLAUSE__CONDTEMP_,
388
389 /* Internal clause: temporary for inscan reductions. */
390 OMP_CLAUSE__SCANTEMP_,
391
392 /* OpenACC/OpenMP clause: if (scalar-expression). */
393 OMP_CLAUSE_IF,
394
395 /* OpenACC clause: self. */
396 OMP_CLAUSE_SELF,
397
398 /* OpenMP clause: num_threads (integer-expression). */
399 OMP_CLAUSE_NUM_THREADS,
400
401 /* OpenMP clause: schedule. */
402 OMP_CLAUSE_SCHEDULE,
403
404 /* OpenMP clause: nowait. */
405 OMP_CLAUSE_NOWAIT,
406
407 /* OpenMP clause: ordered [(constant-integer-expression)]. */
408 OMP_CLAUSE_ORDERED,
409
410 /* OpenACC/OpenMP clause: default. */
411 OMP_CLAUSE_DEFAULT,
412
413 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
414 OMP_CLAUSE_COLLAPSE,
415
416 /* OpenMP clause: untied. */
417 OMP_CLAUSE_UNTIED,
418
419 /* OpenMP clause: final (scalar-expression). */
420 OMP_CLAUSE_FINAL,
421
422 /* OpenMP clause: mergeable. */
423 OMP_CLAUSE_MERGEABLE,
424
425 /* OpenMP clause: device (integer-expression). */
426 OMP_CLAUSE_DEVICE,
427
428 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
429 OMP_CLAUSE_DIST_SCHEDULE,
430
431 /* OpenMP clause: inbranch. */
432 OMP_CLAUSE_INBRANCH,
433
434 /* OpenMP clause: notinbranch. */
435 OMP_CLAUSE_NOTINBRANCH,
436
437 /* OpenMP clause: num_teams(integer-expression). */
438 OMP_CLAUSE_NUM_TEAMS,
439
440 /* OpenMP clause: thread_limit(integer-expression). */
441 OMP_CLAUSE_THREAD_LIMIT,
442
443 /* OpenMP clause: proc_bind ({master,close,spread}). */
444 OMP_CLAUSE_PROC_BIND,
445
446 /* OpenMP clause: safelen (constant-integer-expression). */
447 OMP_CLAUSE_SAFELEN,
448
449 /* OpenMP clause: simdlen (constant-integer-expression). */
450 OMP_CLAUSE_SIMDLEN,
451
452 /* OpenMP clause: device_type ({host,nohost,any}). */
453 OMP_CLAUSE_DEVICE_TYPE,
454
455 /* OpenMP clause: for. */
456 OMP_CLAUSE_FOR,
457
458 /* OpenMP clause: parallel. */
459 OMP_CLAUSE_PARALLEL,
460
461 /* OpenMP clause: sections. */
462 OMP_CLAUSE_SECTIONS,
463
464 /* OpenMP clause: taskgroup. */
465 OMP_CLAUSE_TASKGROUP,
466
467 /* OpenMP clause: priority (integer-expression). */
468 OMP_CLAUSE_PRIORITY,
469
470 /* OpenMP clause: grainsize (integer-expression). */
471 OMP_CLAUSE_GRAINSIZE,
472
473 /* OpenMP clause: num_tasks (integer-expression). */
474 OMP_CLAUSE_NUM_TASKS,
475
476 /* OpenMP clause: nogroup. */
477 OMP_CLAUSE_NOGROUP,
478
479 /* OpenMP clause: threads. */
480 OMP_CLAUSE_THREADS,
481
482 /* OpenMP clause: simd. */
483 OMP_CLAUSE_SIMD,
484
485 /* OpenMP clause: hint (integer-expression). */
486 OMP_CLAUSE_HINT,
487
488 /* OpenMP clause: defaultmap (tofrom: scalar). */
489 OMP_CLAUSE_DEFAULTMAP,
490
491 /* OpenMP clause: order (concurrent). */
492 OMP_CLAUSE_ORDER,
493
494 /* OpenMP clause: bind (binding). */
495 OMP_CLAUSE_BIND,
496
497 /* OpenMP clause: filter (integer-expression). */
498 OMP_CLAUSE_FILTER,
499
500 /* Internally used only clause, holding SIMD uid. */
501 OMP_CLAUSE__SIMDUID_,
502
503 /* Internally used only clause, flag whether this is SIMT simd
504 loop or not. */
505 OMP_CLAUSE__SIMT_,
506
507 /* OpenACC clause: independent. */
508 OMP_CLAUSE_INDEPENDENT,
509
510 /* OpenACC clause: worker [( [num:] integer-expression)]. */
511 OMP_CLAUSE_WORKER,
512
513 /* OpenACC clause: vector [( [length:] integer-expression)]. */
514 OMP_CLAUSE_VECTOR,
515
516 /* OpenACC clause: num_gangs (integer-expression). */
517 OMP_CLAUSE_NUM_GANGS,
518
519 /* OpenACC clause: num_workers (integer-expression). */
520 OMP_CLAUSE_NUM_WORKERS,
521
522 /* OpenACC clause: vector_length (integer-expression). */
523 OMP_CLAUSE_VECTOR_LENGTH,
524
525 /* OpenACC clause: tile ( size-expr-list ). */
526 OMP_CLAUSE_TILE,
527
528 /* OpenACC clause: if_present. */
529 OMP_CLAUSE_IF_PRESENT,
530
531 /* OpenACC clause: finalize. */
532 OMP_CLAUSE_FINALIZE,
533
534 /* OpenACC clause: nohost. */
535 OMP_CLAUSE_NOHOST,
536};
537
538#undef DEFTREESTRUCT
539#define DEFTREESTRUCT(ENUM, NAME) ENUM,
540enum tree_node_structure_enum {
541#include "treestruct.def"
542 LAST_TS_ENUM
543};
544#undef DEFTREESTRUCT
545
546enum omp_clause_schedule_kind {
547 OMP_CLAUSE_SCHEDULE_STATIC,
548 OMP_CLAUSE_SCHEDULE_DYNAMIC,
549 OMP_CLAUSE_SCHEDULE_GUIDED,
550 OMP_CLAUSE_SCHEDULE_AUTO,
551 OMP_CLAUSE_SCHEDULE_RUNTIME,
552 OMP_CLAUSE_SCHEDULE_MASK = (1 << 3) - 1,
553 OMP_CLAUSE_SCHEDULE_MONOTONIC = (1 << 3),
554 OMP_CLAUSE_SCHEDULE_NONMONOTONIC = (1 << 4),
555 OMP_CLAUSE_SCHEDULE_LAST = 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC - 1
556};
557
558enum omp_clause_default_kind {
559 OMP_CLAUSE_DEFAULT_UNSPECIFIED,
560 OMP_CLAUSE_DEFAULT_SHARED,
561 OMP_CLAUSE_DEFAULT_NONE,
562 OMP_CLAUSE_DEFAULT_PRIVATE,
563 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE,
564 OMP_CLAUSE_DEFAULT_PRESENT,
565 OMP_CLAUSE_DEFAULT_LAST
566};
567
568enum omp_clause_defaultmap_kind {
569 OMP_CLAUSE_DEFAULTMAP_CATEGORY_UNSPECIFIED,
570 OMP_CLAUSE_DEFAULTMAP_CATEGORY_ALL,
571 OMP_CLAUSE_DEFAULTMAP_CATEGORY_SCALAR,
572 OMP_CLAUSE_DEFAULTMAP_CATEGORY_AGGREGATE,
573 OMP_CLAUSE_DEFAULTMAP_CATEGORY_ALLOCATABLE,
574 OMP_CLAUSE_DEFAULTMAP_CATEGORY_POINTER,
575 OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK = 7,
576 OMP_CLAUSE_DEFAULTMAP_ALLOC = 1 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
577 OMP_CLAUSE_DEFAULTMAP_TO = 2 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
578 OMP_CLAUSE_DEFAULTMAP_FROM = 3 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
579 OMP_CLAUSE_DEFAULTMAP_TOFROM = 4 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
580 OMP_CLAUSE_DEFAULTMAP_FIRSTPRIVATE
581 = 5 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
582 OMP_CLAUSE_DEFAULTMAP_NONE = 6 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
583 OMP_CLAUSE_DEFAULTMAP_DEFAULT
584 = 7 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
585 OMP_CLAUSE_DEFAULTMAP_PRESENT = 8 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1),
586 OMP_CLAUSE_DEFAULTMAP_MASK = 15 * (OMP_CLAUSE_DEFAULTMAP_CATEGORY_MASK + 1)
587};
588
589enum omp_clause_bind_kind {
590 OMP_CLAUSE_BIND_TEAMS,
591 OMP_CLAUSE_BIND_PARALLEL,
592 OMP_CLAUSE_BIND_THREAD
593};
594
595/* memory-order-clause on OpenMP atomic/flush constructs or
596 argument of atomic_default_mem_order clause. */
597enum omp_memory_order {
598 OMP_MEMORY_ORDER_UNSPECIFIED,
599 OMP_MEMORY_ORDER_RELAXED,
600 OMP_MEMORY_ORDER_ACQUIRE,
601 OMP_MEMORY_ORDER_RELEASE,
602 OMP_MEMORY_ORDER_ACQ_REL,
603 OMP_MEMORY_ORDER_SEQ_CST,
604 OMP_MEMORY_ORDER_MASK = 7,
605 OMP_FAIL_MEMORY_ORDER_UNSPECIFIED = OMP_MEMORY_ORDER_UNSPECIFIED * 8,
606 OMP_FAIL_MEMORY_ORDER_RELAXED = OMP_MEMORY_ORDER_RELAXED * 8,
607 OMP_FAIL_MEMORY_ORDER_ACQUIRE = OMP_MEMORY_ORDER_ACQUIRE * 8,
608 OMP_FAIL_MEMORY_ORDER_RELEASE = OMP_MEMORY_ORDER_RELEASE * 8,
609 OMP_FAIL_MEMORY_ORDER_ACQ_REL = OMP_MEMORY_ORDER_ACQ_REL * 8,
610 OMP_FAIL_MEMORY_ORDER_SEQ_CST = OMP_MEMORY_ORDER_SEQ_CST * 8,
611 OMP_FAIL_MEMORY_ORDER_MASK = OMP_MEMORY_ORDER_MASK * 8
612};
613#define OMP_FAIL_MEMORY_ORDER_SHIFT 3
614
615/* There is a TYPE_QUAL value for each type qualifier. They can be
616 combined by bitwise-or to form the complete set of qualifiers for a
617 type. */
618enum cv_qualifier {
619 TYPE_UNQUALIFIED = 0x0,
620 TYPE_QUAL_CONST = 0x1,
621 TYPE_QUAL_VOLATILE = 0x2,
622 TYPE_QUAL_RESTRICT = 0x4,
623 TYPE_QUAL_ATOMIC = 0x8
624};
625
626/* Standard named or nameless data types of the C compiler. */
627enum tree_index {
628 TI_ERROR_MARK,
629 TI_INTQI_TYPE,
630 TI_INTHI_TYPE,
631 TI_INTSI_TYPE,
632 TI_INTDI_TYPE,
633 TI_INTTI_TYPE,
634
635 TI_UINTQI_TYPE,
636 TI_UINTHI_TYPE,
637 TI_UINTSI_TYPE,
638 TI_UINTDI_TYPE,
639 TI_UINTTI_TYPE,
640
641 TI_ATOMICQI_TYPE,
642 TI_ATOMICHI_TYPE,
643 TI_ATOMICSI_TYPE,
644 TI_ATOMICDI_TYPE,
645 TI_ATOMICTI_TYPE,
646
647 TI_UINT16_TYPE,
648 TI_UINT32_TYPE,
649 TI_UINT64_TYPE,
650 TI_UINT128_TYPE,
651
652 TI_VOID,
653
654 TI_INTEGER_ZERO,
655 TI_INTEGER_ONE,
656 TI_INTEGER_THREE,
657 TI_INTEGER_MINUS_ONE,
658 TI_NULL_POINTER,
659
660 TI_SIZE_ZERO,
661 TI_SIZE_ONE,
662
663 TI_BITSIZE_ZERO,
664 TI_BITSIZE_ONE,
665 TI_BITSIZE_UNIT,
666
667 TI_PUBLIC,
668 TI_PROTECTED,
669 TI_PRIVATE,
670
671 TI_BOOLEAN_FALSE,
672 TI_BOOLEAN_TRUE,
673
674 TI_FLOAT_TYPE,
675 TI_DOUBLE_TYPE,
676 TI_LONG_DOUBLE_TYPE,
677
678 /* __bf16 type if supported (used in C++ as std::bfloat16_t). */
679 TI_BFLOAT16_TYPE,
680
681 /* The _FloatN and _FloatNx types must be consecutive, and in the
682 same sequence as the corresponding complex types, which must also
683 be consecutive; _FloatN must come before _FloatNx; the order must
684 also be the same as in the floatn_nx_types array and the RID_*
685 values in c-common.h. This is so that iterations over these
686 types work as intended. */
687 TI_FLOAT16_TYPE,
688 TI_FLOATN_TYPE_FIRST = TI_FLOAT16_TYPE,
689 TI_FLOATN_NX_TYPE_FIRST = TI_FLOAT16_TYPE,
690 TI_FLOAT32_TYPE,
691 TI_FLOAT64_TYPE,
692 TI_FLOAT128_TYPE,
693 TI_FLOATN_TYPE_LAST = TI_FLOAT128_TYPE,
694#define NUM_FLOATN_TYPES (TI_FLOATN_TYPE_LAST - TI_FLOATN_TYPE_FIRST + 1)
695 TI_FLOAT32X_TYPE,
696 TI_FLOATNX_TYPE_FIRST = TI_FLOAT32X_TYPE,
697 TI_FLOAT64X_TYPE,
698 TI_FLOAT128X_TYPE,
699 TI_FLOATNX_TYPE_LAST = TI_FLOAT128X_TYPE,
700 TI_FLOATN_NX_TYPE_LAST = TI_FLOAT128X_TYPE,
701#define NUM_FLOATNX_TYPES (TI_FLOATNX_TYPE_LAST - TI_FLOATNX_TYPE_FIRST + 1)
702#define NUM_FLOATN_NX_TYPES (TI_FLOATN_NX_TYPE_LAST \
703 - TI_FLOATN_NX_TYPE_FIRST \
704 + 1)
705
706 /* Type used by certain backends for __float128, which in C++ should be
707 distinct type from _Float128 for backwards compatibility reasons. */
708 TI_FLOAT128T_TYPE,
709
710 /* Put the complex types after their component types, so that in (sequential)
711 tree streaming we can assert that their component types have already been
712 handled (see tree-streamer.cc:record_common_node). */
713 TI_COMPLEX_INTEGER_TYPE,
714 TI_COMPLEX_FLOAT_TYPE,
715 TI_COMPLEX_DOUBLE_TYPE,
716 TI_COMPLEX_LONG_DOUBLE_TYPE,
717
718 TI_COMPLEX_FLOAT16_TYPE,
719 TI_COMPLEX_FLOATN_NX_TYPE_FIRST = TI_COMPLEX_FLOAT16_TYPE,
720 TI_COMPLEX_FLOAT32_TYPE,
721 TI_COMPLEX_FLOAT64_TYPE,
722 TI_COMPLEX_FLOAT128_TYPE,
723 TI_COMPLEX_FLOAT32X_TYPE,
724 TI_COMPLEX_FLOAT64X_TYPE,
725 TI_COMPLEX_FLOAT128X_TYPE,
726
727 TI_FLOAT_PTR_TYPE,
728 TI_DOUBLE_PTR_TYPE,
729 TI_LONG_DOUBLE_PTR_TYPE,
730 TI_INTEGER_PTR_TYPE,
731
732 TI_VOID_TYPE,
733 TI_PTR_TYPE,
734 TI_CONST_PTR_TYPE,
735 TI_SIZE_TYPE,
736 TI_PID_TYPE,
737 TI_PTRDIFF_TYPE,
738 TI_VA_LIST_TYPE,
739 TI_VA_LIST_GPR_COUNTER_FIELD,
740 TI_VA_LIST_FPR_COUNTER_FIELD,
741 TI_BOOLEAN_TYPE,
742 TI_FILEPTR_TYPE,
743 TI_CONST_TM_PTR_TYPE,
744 TI_FENV_T_PTR_TYPE,
745 TI_CONST_FENV_T_PTR_TYPE,
746 TI_FEXCEPT_T_PTR_TYPE,
747 TI_CONST_FEXCEPT_T_PTR_TYPE,
748 TI_POINTER_SIZED_TYPE,
749
750 TI_DFLOAT32_TYPE,
751 TI_DFLOAT64_TYPE,
752 TI_DFLOAT128_TYPE,
753
754 TI_VOID_LIST_NODE,
755
756 TI_MAIN_IDENTIFIER,
757
758 TI_SAT_SFRACT_TYPE,
759 TI_SAT_FRACT_TYPE,
760 TI_SAT_LFRACT_TYPE,
761 TI_SAT_LLFRACT_TYPE,
762 TI_SAT_USFRACT_TYPE,
763 TI_SAT_UFRACT_TYPE,
764 TI_SAT_ULFRACT_TYPE,
765 TI_SAT_ULLFRACT_TYPE,
766 TI_SFRACT_TYPE,
767 TI_FRACT_TYPE,
768 TI_LFRACT_TYPE,
769 TI_LLFRACT_TYPE,
770 TI_USFRACT_TYPE,
771 TI_UFRACT_TYPE,
772 TI_ULFRACT_TYPE,
773 TI_ULLFRACT_TYPE,
774 TI_SAT_SACCUM_TYPE,
775 TI_SAT_ACCUM_TYPE,
776 TI_SAT_LACCUM_TYPE,
777 TI_SAT_LLACCUM_TYPE,
778 TI_SAT_USACCUM_TYPE,
779 TI_SAT_UACCUM_TYPE,
780 TI_SAT_ULACCUM_TYPE,
781 TI_SAT_ULLACCUM_TYPE,
782 TI_SACCUM_TYPE,
783 TI_ACCUM_TYPE,
784 TI_LACCUM_TYPE,
785 TI_LLACCUM_TYPE,
786 TI_USACCUM_TYPE,
787 TI_UACCUM_TYPE,
788 TI_ULACCUM_TYPE,
789 TI_ULLACCUM_TYPE,
790 TI_QQ_TYPE,
791 TI_HQ_TYPE,
792 TI_SQ_TYPE,
793 TI_DQ_TYPE,
794 TI_TQ_TYPE,
795 TI_UQQ_TYPE,
796 TI_UHQ_TYPE,
797 TI_USQ_TYPE,
798 TI_UDQ_TYPE,
799 TI_UTQ_TYPE,
800 TI_SAT_QQ_TYPE,
801 TI_SAT_HQ_TYPE,
802 TI_SAT_SQ_TYPE,
803 TI_SAT_DQ_TYPE,
804 TI_SAT_TQ_TYPE,
805 TI_SAT_UQQ_TYPE,
806 TI_SAT_UHQ_TYPE,
807 TI_SAT_USQ_TYPE,
808 TI_SAT_UDQ_TYPE,
809 TI_SAT_UTQ_TYPE,
810 TI_HA_TYPE,
811 TI_SA_TYPE,
812 TI_DA_TYPE,
813 TI_TA_TYPE,
814 TI_UHA_TYPE,
815 TI_USA_TYPE,
816 TI_UDA_TYPE,
817 TI_UTA_TYPE,
818 TI_SAT_HA_TYPE,
819 TI_SAT_SA_TYPE,
820 TI_SAT_DA_TYPE,
821 TI_SAT_TA_TYPE,
822 TI_SAT_UHA_TYPE,
823 TI_SAT_USA_TYPE,
824 TI_SAT_UDA_TYPE,
825 TI_SAT_UTA_TYPE,
826
827 TI_MODULE_HWM,
828 /* Nodes below here change during compilation, and should therefore
829 not be in the C++ module's global tree table. */
830
831 TI_OPTIMIZATION_DEFAULT,
832 TI_OPTIMIZATION_CURRENT,
833 TI_TARGET_OPTION_DEFAULT,
834 TI_TARGET_OPTION_CURRENT,
835 TI_CURRENT_TARGET_PRAGMA,
836 TI_CURRENT_OPTIMIZE_PRAGMA,
837
838 TI_CHREC_DONT_KNOW,
839 TI_CHREC_KNOWN,
840
841 TI_MAX
842};
843
844/* An enumeration of the standard C integer types. These must be
845 ordered so that shorter types appear before longer ones, and so
846 that signed types appear before unsigned ones, for the correct
847 functioning of interpret_integer() in c-lex.cc. */
848enum integer_type_kind {
849 itk_char,
850 itk_signed_char,
851 itk_unsigned_char,
852 itk_short,
853 itk_unsigned_short,
854 itk_int,
855 itk_unsigned_int,
856 itk_long,
857 itk_unsigned_long,
858 itk_long_long,
859 itk_unsigned_long_long,
860
861 itk_intN_0,
862 itk_unsigned_intN_0,
863 itk_intN_1,
864 itk_unsigned_intN_1,
865 itk_intN_2,
866 itk_unsigned_intN_2,
867 itk_intN_3,
868 itk_unsigned_intN_3,
869
870 itk_none
871};
872
873/* A pointer-to-function member type looks like:
874
875 struct {
876 __P __pfn;
877 ptrdiff_t __delta;
878 };
879
880 If __pfn is NULL, it is a NULL pointer-to-member-function.
881
882 (Because the vtable is always the first thing in the object, we
883 don't need its offset.) If the function is virtual, then PFN is
884 one plus twice the index into the vtable; otherwise, it is just a
885 pointer to the function.
886
887 Unfortunately, using the lowest bit of PFN doesn't work in
888 architectures that don't impose alignment requirements on function
889 addresses, or that use the lowest bit to tell one ISA from another,
890 for example. For such architectures, we use the lowest bit of
891 DELTA instead of the lowest bit of the PFN, and DELTA will be
892 multiplied by 2. */
893enum ptrmemfunc_vbit_where_t {
894 ptrmemfunc_vbit_in_pfn,
895 ptrmemfunc_vbit_in_delta
896};
897
898/* Flags that may be passed in the third argument of decl_attributes, and
899 to handler functions for attributes. */
900enum attribute_flags {
901 /* The type passed in is the type of a DECL, and any attributes that
902 should be passed in again to be applied to the DECL rather than the
903 type should be returned. */
904 ATTR_FLAG_DECL_NEXT = 1,
905 /* The type passed in is a function return type, and any attributes that
906 should be passed in again to be applied to the function type rather
907 than the return type should be returned. */
908 ATTR_FLAG_FUNCTION_NEXT = 2,
909 /* The type passed in is an array element type, and any attributes that
910 should be passed in again to be applied to the array type rather
911 than the element type should be returned. */
912 ATTR_FLAG_ARRAY_NEXT = 4,
913 /* The type passed in is a structure, union or enumeration type being
914 created, and should be modified in place. */
915 ATTR_FLAG_TYPE_IN_PLACE = 8,
916 /* The attributes are being applied by default to a library function whose
917 name indicates known behavior, and should be silently ignored if they
918 are not in fact compatible with the function type. */
919 ATTR_FLAG_BUILT_IN = 16,
920 /* A given attribute has been parsed as a C++-11 attribute. */
921 ATTR_FLAG_CXX11 = 32,
922 /* The attribute handler is being invoked with an internal argument
923 that may not otherwise be valid when specified in source code. */
924 ATTR_FLAG_INTERNAL = 64
925};
926
927/* Types used to represent sizes. */
928enum size_type_kind {
929 stk_sizetype, /* Normal representation of sizes in bytes. */
930 stk_ssizetype, /* Signed representation of sizes in bytes. */
931 stk_bitsizetype, /* Normal representation of sizes in bits. */
932 stk_sbitsizetype, /* Signed representation of sizes in bits. */
933 stk_type_kind_last
934};
935
936/* Flags controlling operand_equal_p() behavior. */
937enum operand_equal_flag {
938 OEP_ONLY_CONST = 1,
939 OEP_PURE_SAME = 2,
940 OEP_MATCH_SIDE_EFFECTS = 4,
941 OEP_ADDRESS_OF = 8,
942 /* Internal within operand_equal_p: */
943 OEP_NO_HASH_CHECK = 16,
944 /* Internal within inchash::add_expr: */
945 OEP_HASH_CHECK = 32,
946 /* Makes operand_equal_p handle more expressions: */
947 OEP_LEXICOGRAPHIC = 64,
948 OEP_BITWISE = 128,
949 /* For OEP_ADDRESS_OF of COMPONENT_REFs, only consider same fields as
950 equivalent rather than also different fields with the same offset. */
951 OEP_ADDRESS_OF_SAME_FIELD = 256,
952 /* In conjunction with OEP_LEXICOGRAPHIC considers names of declarations
953 of the same kind. Used to compare VLA bounds involving parameters
954 across redeclarations of the same function. */
955 OEP_DECL_NAME = 512
956};
957
958/* Enum and arrays used for tree allocation stats.
959 Keep in sync with tree.cc:tree_node_kind_names. */
960enum tree_node_kind {
961 d_kind,
962 t_kind,
963 b_kind,
964 s_kind,
965 r_kind,
966 e_kind,
967 c_kind,
968 id_kind,
969 vec_kind,
970 binfo_kind,
971 ssa_name_kind,
972 constr_kind,
973 x_kind,
974 lang_decl,
975 lang_type,
976 omp_clause_kind,
977 all_kinds
978};
979
980enum annot_expr_kind {
981 annot_expr_ivdep_kind,
982 annot_expr_unroll_kind,
983 annot_expr_no_vector_kind,
984 annot_expr_vector_kind,
985 annot_expr_parallel_kind,
986 annot_expr_kind_last
987};
988
989/* The kind of a TREE_CLOBBER_P CONSTRUCTOR node. */
990enum clobber_kind {
991 /* Unspecified, this clobber acts as a store of an undefined value. */
992 CLOBBER_UNDEF,
993 /* This clobber ends the lifetime of the storage. */
994 CLOBBER_EOL,
995 CLOBBER_LAST
996};
997
998/*---------------------------------------------------------------------------
999 Type definitions
1000---------------------------------------------------------------------------*/
1001/* When processing aliases at the symbol table level, we need the
1002 declaration of target. For this reason we need to queue aliases and
1003 process them after all declarations has been produced. */
1004struct GTY(()) alias_pair {
1005 tree decl;
1006 tree target;
1007};
1008
1009/* An initialization priority. */
1010typedef unsigned short priority_type;
1011
1012/* The type of a callback function for walking over tree structure. */
1013typedef tree (*walk_tree_fn) (tree *, int *, void *);
1014
1015/* The type of a callback function that represents a custom walk_tree. */
1016typedef tree (*walk_tree_lh) (tree *, int *, tree (*) (tree *, int *, void *),
1017 void *, hash_set<tree> *);
1018
1019
1020/*---------------------------------------------------------------------------
1021 Main data structures
1022---------------------------------------------------------------------------*/
1023/* A tree node can represent a data type, a variable, an expression
1024 or a statement. Each node has a TREE_CODE which says what kind of
1025 thing it represents. Some common codes are:
1026 INTEGER_TYPE -- represents a type of integers.
1027 ARRAY_TYPE -- represents a type of pointer.
1028 VAR_DECL -- represents a declared variable.
1029 INTEGER_CST -- represents a constant integer value.
1030 PLUS_EXPR -- represents a sum (an expression).
1031
1032 As for the contents of a tree node: there are some fields
1033 that all nodes share. Each TREE_CODE has various special-purpose
1034 fields as well. The fields of a node are never accessed directly,
1035 always through accessor macros. */
1036
1037/* Every kind of tree node starts with this structure,
1038 so all nodes have these fields.
1039
1040 See the accessor macros, defined below, for documentation of the
1041 fields, and the table below which connects the fields and the
1042 accessor macros. */
1043
1044struct GTY(()) tree_base {
1045 ENUM_BITFIELD(tree_code) code : 16;
1046
1047 unsigned side_effects_flag : 1;
1048 unsigned constant_flag : 1;
1049 unsigned addressable_flag : 1;
1050 unsigned volatile_flag : 1;
1051 unsigned readonly_flag : 1;
1052 unsigned asm_written_flag: 1;
1053 unsigned nowarning_flag : 1;
1054 unsigned visited : 1;
1055
1056 unsigned used_flag : 1;
1057 unsigned nothrow_flag : 1;
1058 unsigned static_flag : 1;
1059 unsigned public_flag : 1;
1060 unsigned private_flag : 1;
1061 unsigned protected_flag : 1;
1062 unsigned deprecated_flag : 1;
1063 unsigned default_def_flag : 1;
1064
1065 union {
1066 /* The bits in the following structure should only be used with
1067 accessor macros that constrain inputs with tree checking. */
1068 struct {
1069 unsigned lang_flag_0 : 1;
1070 unsigned lang_flag_1 : 1;
1071 unsigned lang_flag_2 : 1;
1072 unsigned lang_flag_3 : 1;
1073 unsigned lang_flag_4 : 1;
1074 unsigned lang_flag_5 : 1;
1075 unsigned lang_flag_6 : 1;
1076 unsigned saturating_flag : 1;
1077
1078 unsigned unsigned_flag : 1;
1079 unsigned packed_flag : 1;
1080 unsigned user_align : 1;
1081 unsigned nameless_flag : 1;
1082 unsigned atomic_flag : 1;
1083 unsigned unavailable_flag : 1;
1084 unsigned spare0 : 2;
1085
1086 unsigned spare1 : 8;
1087
1088 /* For _TYPE nodes, this is TYPE_ADDR_SPACE; the reason it is
1089 present in tree_base instead of tree_type is to save space. The size
1090 of the field must be large enough to hold addr_space_t values.
1091 For CONSTRUCTOR nodes this holds the clobber_kind enum.
1092 The C++ front-end uses this in IDENTIFIER_NODE and NAMESPACE_DECL. */
1093 unsigned address_space : 8;
1094 } bits;
1095
1096 /* The following fields are present in tree_base to save space. The
1097 nodes using them do not require any of the flags above and so can
1098 make better use of the 4-byte sized word. */
1099
1100 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
1101 struct {
1102 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
1103 its native precision. */
1104 unsigned short unextended;
1105
1106 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
1107 wider precisions based on its TYPE_SIGN. */
1108 unsigned short extended;
1109 } int_length;
1110
1111 /* VEC length. This field is only used with TREE_VEC. */
1112 int length;
1113
1114 /* This field is only used with VECTOR_CST. */
1115 struct {
1116 /* The value of VECTOR_CST_LOG2_NPATTERNS. */
1117 unsigned int log2_npatterns : 8;
1118
1119 /* The value of VECTOR_CST_NELTS_PER_PATTERN. */
1120 unsigned int nelts_per_pattern : 8;
1121
1122 /* For future expansion. */
1123 unsigned int unused : 16;
1124 } vector_cst;
1125
1126 /* SSA version number. This field is only used with SSA_NAME. */
1127 unsigned int version;
1128
1129 /* CHREC_VARIABLE. This field is only used with POLYNOMIAL_CHREC. */
1130 unsigned int chrec_var;
1131
1132 /* Internal function code. */
1133 enum internal_fn ifn;
1134
1135 /* OMP_ATOMIC* memory order. */
1136 enum omp_memory_order omp_atomic_memory_order;
1137
1138 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
1139 expression trees and specify known data non-dependences. For
1140 two memory references in a function they are known to not
1141 alias if dependence_info.clique are equal and dependence_info.base
1142 are distinct. Clique number zero means there is no information,
1143 clique number one is populated from function global information
1144 and thus needs no remapping on transforms like loop unrolling. */
1145 struct {
1146 unsigned short clique;
1147 unsigned short base;
1148 } dependence_info;
1149 } GTY((skip(""))) u;
1150};
1151
1152/* The following table lists the uses of each of the above flags and
1153 for which types of nodes they are defined.
1154
1155 addressable_flag:
1156
1157 TREE_ADDRESSABLE in
1158 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
1159 SSA_NAME
1160 all types
1161 CONSTRUCTOR, IDENTIFIER_NODE
1162 STMT_EXPR
1163
1164 CALL_EXPR_TAILCALL in
1165 CALL_EXPR
1166
1167 CASE_LOW_SEEN in
1168 CASE_LABEL_EXPR
1169
1170 PREDICT_EXPR_OUTCOME in
1171 PREDICT_EXPR
1172
1173 OMP_CLAUSE_MAP_DECL_MAKE_ADDRESSABLE in
1174 OMP_CLAUSE
1175
1176 static_flag:
1177
1178 TREE_STATIC in
1179 VAR_DECL, FUNCTION_DECL
1180 CONSTRUCTOR
1181
1182 TREE_NO_TRAMPOLINE in
1183 ADDR_EXPR
1184
1185 BINFO_VIRTUAL_P in
1186 TREE_BINFO
1187
1188 TREE_SYMBOL_REFERENCED in
1189 IDENTIFIER_NODE
1190
1191 CLEANUP_EH_ONLY in
1192 TARGET_EXPR, WITH_CLEANUP_EXPR
1193
1194 TRY_CATCH_IS_CLEANUP in
1195 TRY_CATCH_EXPR
1196
1197 ASM_INPUT_P in
1198 ASM_EXPR
1199
1200 TYPE_REF_CAN_ALIAS_ALL in
1201 POINTER_TYPE, REFERENCE_TYPE
1202
1203 CASE_HIGH_SEEN in
1204 CASE_LABEL_EXPR
1205
1206 ENUM_IS_SCOPED in
1207 ENUMERAL_TYPE
1208
1209 TRANSACTION_EXPR_OUTER in
1210 TRANSACTION_EXPR
1211
1212 MUST_TAIL_CALL in
1213 CALL_EXPR
1214
1215 public_flag:
1216
1217 TREE_OVERFLOW in
1218 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
1219
1220 TREE_PUBLIC in
1221 VAR_DECL, FUNCTION_DECL
1222 IDENTIFIER_NODE
1223
1224 CONSTRUCTOR_NO_CLEARING in
1225 CONSTRUCTOR
1226
1227 ASM_VOLATILE_P in
1228 ASM_EXPR
1229
1230 CALL_EXPR_VA_ARG_PACK in
1231 CALL_EXPR
1232
1233 TYPE_CACHED_VALUES_P in
1234 all types
1235
1236 SAVE_EXPR_RESOLVED_P in
1237 SAVE_EXPR
1238
1239 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
1240 OMP_CLAUSE_LASTPRIVATE
1241
1242 OMP_CLAUSE_PRIVATE_DEBUG in
1243 OMP_CLAUSE_PRIVATE
1244
1245 OMP_CLAUSE_LINEAR_NO_COPYIN in
1246 OMP_CLAUSE_LINEAR
1247
1248 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1249 OMP_CLAUSE_MAP
1250
1251 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1252 OMP_CLAUSE_{,TASK_,IN_}REDUCTION
1253
1254 OMP_CLAUSE_USE_DEVICE_PTR_IF_PRESENT in
1255 OMP_CLAUSE_USE_DEVICE_PTR
1256
1257 TRANSACTION_EXPR_RELAXED in
1258 TRANSACTION_EXPR
1259
1260 FALLTHROUGH_LABEL_P in
1261 LABEL_DECL
1262
1263 SSA_NAME_IS_VIRTUAL_OPERAND in
1264 SSA_NAME
1265
1266 EXPR_LOCATION_WRAPPER_P in
1267 NON_LVALUE_EXPR, VIEW_CONVERT_EXPR
1268
1269 private_flag:
1270
1271 TREE_PRIVATE in
1272 all decls
1273
1274 CALL_EXPR_RETURN_SLOT_OPT in
1275 CALL_EXPR
1276
1277 OMP_SECTION_LAST in
1278 OMP_SECTION
1279
1280 OMP_PARALLEL_COMBINED in
1281 OMP_PARALLEL
1282
1283 OMP_CLAUSE_PRIVATE_OUTER_REF in
1284 OMP_CLAUSE_PRIVATE
1285
1286 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1287 OMP_CLAUSE_LINEAR
1288
1289 TYPE_REF_IS_RVALUE in
1290 REFERENCE_TYPE
1291
1292 ENUM_IS_OPAQUE in
1293 ENUMERAL_TYPE
1294
1295 protected_flag:
1296
1297 TREE_PROTECTED in
1298 BLOCK
1299 all decls
1300
1301 CALL_FROM_THUNK_P and
1302 CALL_ALLOCA_FOR_VAR_P and
1303 CALL_FROM_NEW_OR_DELETE_P in
1304 CALL_EXPR
1305
1306 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1307 OMP_CLAUSE_LINEAR
1308
1309 ASM_INLINE_P in
1310 ASM_EXPR
1311
1312 side_effects_flag:
1313
1314 TREE_SIDE_EFFECTS in
1315 all expressions
1316 all decls
1317 all constants
1318
1319 FORCED_LABEL in
1320 LABEL_DECL
1321
1322 volatile_flag:
1323
1324 TREE_THIS_VOLATILE in
1325 all expressions
1326 all decls
1327
1328 TYPE_VOLATILE in
1329 all types
1330
1331 readonly_flag:
1332
1333 TREE_READONLY in
1334 all expressions
1335 all decls
1336
1337 TYPE_READONLY in
1338 all types
1339
1340 constant_flag:
1341
1342 TREE_CONSTANT in
1343 all expressions
1344 all decls
1345 all constants
1346
1347 TYPE_SIZES_GIMPLIFIED in
1348 all types
1349
1350 unsigned_flag:
1351
1352 TYPE_UNSIGNED in
1353 all types
1354
1355 DECL_UNSIGNED in
1356 all decls
1357
1358 asm_written_flag:
1359
1360 TREE_ASM_WRITTEN in
1361 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1362 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1363 BLOCK, STRING_CST
1364
1365 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1366 SSA_NAME
1367
1368 used_flag:
1369
1370 TREE_USED in
1371 all expressions
1372 all decls
1373 IDENTIFIER_NODE
1374
1375 nothrow_flag:
1376
1377 TREE_NOTHROW in
1378 CALL_EXPR
1379 FUNCTION_DECL
1380
1381 TREE_THIS_NOTRAP in
1382 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1383
1384 SSA_NAME_IN_FREE_LIST in
1385 SSA_NAME
1386
1387 DECL_NONALIASED in
1388 VAR_DECL
1389
1390 deprecated_flag:
1391
1392 TREE_DEPRECATED in
1393 all decls
1394 all types
1395
1396 IDENTIFIER_TRANSPARENT_ALIAS in
1397 IDENTIFIER_NODE
1398
1399 SSA_NAME_POINTS_TO_READONLY_MEMORY in
1400 SSA_NAME
1401
1402 unavailable_flag:
1403
1404 TREE_UNAVAILABLE in
1405 all decls
1406 all types
1407
1408 visited:
1409
1410 TREE_VISITED in
1411 all trees (used liberally by many passes)
1412
1413 saturating_flag:
1414
1415 TYPE_REVERSE_STORAGE_ORDER in
1416 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1417
1418 TYPE_SATURATING in
1419 other types
1420
1421 VAR_DECL_IS_VIRTUAL_OPERAND in
1422 VAR_DECL
1423
1424 nowarning_flag:
1425
1426 TREE_NO_WARNING in
1427 all expressions
1428 all decls
1429
1430 TYPE_ARTIFICIAL in
1431 all types
1432
1433 default_def_flag:
1434
1435 TYPE_FINAL_P in
1436 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1437
1438 TYPE_VECTOR_OPAQUE in
1439 VECTOR_TYPE
1440
1441 SSA_NAME_IS_DEFAULT_DEF in
1442 SSA_NAME
1443
1444 DECL_NONLOCAL_FRAME in
1445 VAR_DECL
1446
1447 REF_REVERSE_STORAGE_ORDER in
1448 BIT_FIELD_REF, MEM_REF
1449
1450 FUNC_ADDR_BY_DESCRIPTOR in
1451 ADDR_EXPR
1452
1453 CALL_EXPR_BY_DESCRIPTOR in
1454 CALL_EXPR
1455
1456*/
1457
1458struct GTY(()) tree_typed {
1459 struct tree_base base;
1460 tree type;
1461};
1462
1463struct GTY(()) tree_common {
1464 struct tree_typed typed;
1465 tree chain;
1466};
1467
1468struct GTY(()) tree_int_cst {
1469 struct tree_typed typed;
1470 HOST_WIDE_INT val[1];
1471};
1472
1473
1474struct GTY(()) tree_real_cst {
1475 struct tree_typed typed;
1476 struct real_value value;
1477};
1478
1479struct GTY(()) tree_fixed_cst {
1480 struct tree_typed typed;
1481 struct fixed_value * fixed_cst_ptr;
1482};
1483
1484struct GTY(()) tree_string {
1485 struct tree_typed typed;
1486 int length;
1487 char str[1];
1488};
1489
1490struct GTY(()) tree_complex {
1491 struct tree_typed typed;
1492 tree real;
1493 tree imag;
1494};
1495
1496struct GTY(()) tree_vector {
1497 struct tree_typed typed;
1498 tree GTY ((length ("vector_cst_encoded_nelts ((tree) &%h)"))) elts[1];
1499};
1500
1501struct GTY(()) tree_poly_int_cst {
1502 struct tree_typed typed;
1503 tree coeffs[NUM_POLY_INT_COEFFS];
1504};
1505
1506struct GTY(()) tree_identifier {
1507 struct tree_common common;
1508 struct ht_identifier id;
1509};
1510
1511struct GTY(()) tree_list {
1512 struct tree_common common;
1513 tree purpose;
1514 tree value;
1515};
1516
1517struct GTY(()) tree_vec {
1518 struct tree_common common;
1519 tree GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a[1];
1520};
1521
1522/* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1523 element. INDEX can optionally design the position of VALUE: in arrays,
1524 it is the index where VALUE has to be placed; in structures, it is the
1525 FIELD_DECL of the member. */
1526struct GTY(()) constructor_elt {
1527 tree index;
1528 tree value;
1529};
1530
1531struct GTY(()) tree_constructor {
1532 struct tree_typed typed;
1533 vec<constructor_elt, va_gc> *elts;
1534};
1535
1536enum omp_clause_depend_kind
1537{
1538 OMP_CLAUSE_DEPEND_IN,
1539 OMP_CLAUSE_DEPEND_OUT,
1540 OMP_CLAUSE_DEPEND_INOUT,
1541 OMP_CLAUSE_DEPEND_MUTEXINOUTSET,
1542 OMP_CLAUSE_DEPEND_INOUTSET,
1543 OMP_CLAUSE_DEPEND_DEPOBJ,
1544 OMP_CLAUSE_DEPEND_INVALID,
1545 OMP_CLAUSE_DEPEND_LAST
1546};
1547
1548enum omp_clause_doacross_kind
1549{
1550 OMP_CLAUSE_DOACROSS_SOURCE,
1551 OMP_CLAUSE_DOACROSS_SINK,
1552 OMP_CLAUSE_DOACROSS_LAST
1553};
1554
1555enum omp_clause_proc_bind_kind
1556{
1557 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1558 OMP_CLAUSE_PROC_BIND_FALSE = 0,
1559 OMP_CLAUSE_PROC_BIND_TRUE = 1,
1560 OMP_CLAUSE_PROC_BIND_PRIMARY = 2,
1561 OMP_CLAUSE_PROC_BIND_MASTER = 2,
1562 OMP_CLAUSE_PROC_BIND_CLOSE = 3,
1563 OMP_CLAUSE_PROC_BIND_SPREAD = 4,
1564 OMP_CLAUSE_PROC_BIND_LAST
1565};
1566
1567enum omp_clause_device_type_kind
1568{
1569 OMP_CLAUSE_DEVICE_TYPE_HOST = 1,
1570 OMP_CLAUSE_DEVICE_TYPE_NOHOST = 2,
1571 OMP_CLAUSE_DEVICE_TYPE_ANY = 3
1572};
1573
1574enum omp_clause_linear_kind
1575{
1576 OMP_CLAUSE_LINEAR_DEFAULT,
1577 OMP_CLAUSE_LINEAR_REF,
1578 OMP_CLAUSE_LINEAR_VAL,
1579 OMP_CLAUSE_LINEAR_UVAL
1580};
1581
1582struct GTY(()) tree_exp {
1583 struct tree_typed typed;
1584 location_t locus;
1585 tree GTY ((length ("TREE_OPERAND_LENGTH ((tree)&%h)"))) operands[1];
1586};
1587
1588/* Immediate use linking structure. This structure is used for maintaining
1589 a doubly linked list of uses of an SSA_NAME. */
1590struct GTY(()) ssa_use_operand_t {
1591 struct ssa_use_operand_t* GTY((skip(""))) prev;
1592 struct ssa_use_operand_t* GTY((skip(""))) next;
1593 /* Immediate uses for a given SSA name are maintained as a cyclic
1594 list. To recognize the root of this list, the location field
1595 needs to point to the original SSA name. Since statements and
1596 SSA names are of different data types, we need this union. See
1597 the explanation in struct imm_use_iterator. */
1598 union { gimple *stmt; tree ssa_name; } GTY((skip(""))) loc;
1599 tree *GTY((skip(""))) use;
1600};
1601
1602struct GTY(()) tree_ssa_name {
1603 struct tree_typed typed;
1604
1605 /* _DECL wrapped by this SSA name. */
1606 tree var;
1607
1608 /* Statement that defines this SSA name. */
1609 gimple *def_stmt;
1610
1611 /* Value range information. */
1612 union ssa_name_info_type {
1613 /* Range and aliasing info for pointers. */
1614 struct GTY ((tag ("0"))) ptr_info_def *ptr_info;
1615 /* Range info for everything else. */
1616 struct GTY ((tag ("1"))) vrange_storage * range_info;
1617 } GTY ((desc ("%1.typed.type ?" \
1618 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info;
1619 /* Immediate uses list for this SSA_NAME. */
1620 struct ssa_use_operand_t imm_uses;
1621};
1622
1623struct GTY(()) phi_arg_d {
1624 /* imm_use MUST be the first element in struct because we do some
1625 pointer arithmetic with it. See phi_arg_index_from_use. */
1626 struct ssa_use_operand_t imm_use;
1627 tree def;
1628 location_t locus;
1629};
1630
1631struct GTY(()) tree_omp_clause {
1632 struct tree_common common;
1633 location_t locus;
1634 enum omp_clause_code code;
1635 union omp_clause_subcode {
1636 enum omp_clause_default_kind default_kind;
1637 enum omp_clause_schedule_kind schedule_kind;
1638 enum omp_clause_depend_kind depend_kind;
1639 enum omp_clause_doacross_kind doacross_kind;
1640 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1641 unsigned int map_kind;
1642 enum omp_clause_proc_bind_kind proc_bind_kind;
1643 enum tree_code reduction_code;
1644 enum omp_clause_linear_kind linear_kind;
1645 enum tree_code if_modifier;
1646 enum omp_clause_defaultmap_kind defaultmap_kind;
1647 enum omp_clause_bind_kind bind_kind;
1648 enum omp_clause_device_type_kind device_type_kind;
1649 } GTY ((skip)) subcode;
1650
1651 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1652 usage. */
1653 gimple_seq gimple_reduction_init;
1654 gimple_seq gimple_reduction_merge;
1655
1656 tree GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1657 ops[1];
1658};
1659
1660struct GTY(()) tree_block {
1661 struct tree_base base;
1662 tree chain;
1663
1664 unsigned block_num;
1665
1666 location_t locus;
1667 location_t end_locus;
1668
1669 tree vars;
1670 vec<tree, va_gc> *nonlocalized_vars;
1671
1672 tree subblocks;
1673 tree supercontext;
1674 tree abstract_origin;
1675 tree fragment_origin;
1676 tree fragment_chain;
1677
1678 /* Pointer to the DWARF lexical block. */
1679 struct die_struct *die;
1680};
1681
1682struct GTY(()) tree_type_common {
1683 struct tree_common common;
1684 tree size;
1685 tree size_unit;
1686 tree attributes;
1687 unsigned int uid;
1688
1689 ENUM_BITFIELD(machine_mode) mode : MACHINE_MODE_BITSIZE;
1690
1691 unsigned int precision : 16;
1692 unsigned lang_flag_0 : 1;
1693 unsigned lang_flag_1 : 1;
1694 unsigned lang_flag_2 : 1;
1695 unsigned lang_flag_3 : 1;
1696 unsigned lang_flag_4 : 1;
1697 unsigned lang_flag_5 : 1;
1698 unsigned lang_flag_6 : 1;
1699 unsigned lang_flag_7 : 1;
1700
1701 /* TYPE_ALIGN in log2; this has to be large enough to hold values
1702 of the maximum of BIGGEST_ALIGNMENT and MAX_OFILE_ALIGNMENT,
1703 the latter being usually the larger. For ELF it is 8<<28,
1704 so we need to store the value 32 (not 31, as we need the zero
1705 as well), hence six bits. */
1706 unsigned align : 6;
1707 /* TYPE_STRING_FLAG for INTEGER_TYPE and ARRAY_TYPE.
1708 TYPE_CXX_ODR_P for RECORD_TYPE and UNION_TYPE. */
1709 unsigned string_flag : 1;
1710 unsigned no_force_blk_flag : 1;
1711
1712 unsigned warn_if_not_align : 6;
1713 unsigned needs_constructing_flag : 1;
1714 unsigned transparent_aggr_flag : 1;
1715
1716 unsigned contains_placeholder_bits : 2;
1717 unsigned restrict_flag : 1;
1718 unsigned typeless_storage : 1;
1719 unsigned empty_flag : 1;
1720 unsigned indivisible_p : 1;
1721 /* TYPE_NO_NAMED_ARGS_STDARG_P for a stdarg function.
1722 Or TYPE_INCLUDES_FLEXARRAY for RECORD_TYPE and UNION_TYPE. */
1723 unsigned no_named_args_stdarg_p : 1;
1724 unsigned spare : 1;
1725
1726 alias_set_type alias_set;
1727 tree pointer_to;
1728 tree reference_to;
1729 union tree_type_symtab {
1730 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address;
1731 struct die_struct * GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die;
1732 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab;
1733 tree canonical;
1734 tree next_variant;
1735 tree main_variant;
1736 tree context;
1737 tree name;
1738};
1739
1740struct GTY(()) tree_type_with_lang_specific {
1741 struct tree_type_common common;
1742 /* Points to a structure whose details depend on the language in use. */
1743 struct lang_type *lang_specific;
1744};
1745
1746struct GTY(()) tree_type_non_common {
1747 struct tree_type_with_lang_specific with_lang_specific;
1748 tree values;
1749 tree minval;
1750 tree maxval;
1751 tree lang_1;
1752};
1753
1754struct GTY (()) tree_binfo {
1755 struct tree_common common;
1756
1757 tree offset;
1758 tree vtable;
1759 tree virtuals;
1760 tree vptr_field;
1761 vec<tree, va_gc> *base_accesses;
1762 tree inheritance;
1763
1764 tree vtt_subvtt;
1765 tree vtt_vptr;
1766
1767 vec<tree, va_gc> base_binfos;
1768};
1769
1770struct GTY(()) tree_decl_minimal {
1771 struct tree_common common;
1772 location_t locus;
1773 unsigned int uid;
1774 tree name;
1775 tree context;
1776};
1777
1778struct GTY(()) tree_decl_common {
1779 struct tree_decl_minimal common;
1780 tree size;
1781
1782 ENUM_BITFIELD(machine_mode) mode : MACHINE_MODE_BITSIZE;
1783
1784 unsigned nonlocal_flag : 1;
1785 unsigned virtual_flag : 1;
1786 unsigned ignored_flag : 1;
1787 unsigned abstract_flag : 1;
1788 unsigned artificial_flag : 1;
1789 unsigned preserve_flag: 1;
1790 unsigned debug_expr_is_from : 1;
1791
1792 unsigned lang_flag_0 : 1;
1793 unsigned lang_flag_1 : 1;
1794 unsigned lang_flag_2 : 1;
1795 unsigned lang_flag_3 : 1;
1796 unsigned lang_flag_4 : 1;
1797 unsigned lang_flag_5 : 1;
1798 unsigned lang_flag_6 : 1;
1799 unsigned lang_flag_7 : 1;
1800 unsigned lang_flag_8 : 1;
1801
1802 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER
1803 In TRANSLATION_UNIT_DECL, this is TRANSLATION_UNIT_WARN_EMPTY_P.
1804 In FIELD_DECL, this is DECL_FIELD_ABI_IGNORED. */
1805 unsigned decl_flag_0 : 1;
1806 /* In FIELD_DECL, this is DECL_BIT_FIELD
1807 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1808 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1809 unsigned decl_flag_1 : 1;
1810 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1811 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1812 DECL_HAS_VALUE_EXPR_P. */
1813 unsigned decl_flag_2 : 1;
1814 /* In FIELD_DECL, this is DECL_PADDING_P.
1815 In VAR_DECL, this is DECL_MERGEABLE. */
1816 unsigned decl_flag_3 : 1;
1817 /* Logically, these two would go in a theoretical base shared by var and
1818 parm decl. */
1819 unsigned not_gimple_reg_flag : 1;
1820 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1821 unsigned decl_by_reference_flag : 1;
1822 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1823 unsigned decl_read_flag : 1;
1824 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1825 /* In a PARM_DECL, this is DECL_HIDDEN_STRING_LENGTH. */
1826 unsigned decl_nonshareable_flag : 1;
1827
1828 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1829 unsigned int off_align : 6;
1830
1831 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1832 unsigned int align : 6;
1833
1834 /* DECL_WARN_IF_NOT_ALIGN. It should have the same size as
1835 TYPE_WARN_IF_NOT_ALIGN. */
1836 unsigned int warn_if_not_align : 6;
1837
1838 /* In FIELD_DECL, this is DECL_NOT_FLEXARRAY. */
1839 unsigned int decl_not_flexarray : 1;
1840
1841 /* 5 bits unused. */
1842
1843 /* UID for points-to sets, stable over copying from inlining. */
1844 unsigned int pt_uid;
1845
1846 tree size_unit;
1847 tree initial;
1848 tree attributes;
1849 tree abstract_origin;
1850
1851 /* Points to a structure whose details depend on the language in use. */
1852 struct lang_decl *lang_specific;
1853};
1854
1855struct GTY(()) tree_decl_with_rtl {
1856 struct tree_decl_common common;
1857 rtx rtl;
1858};
1859
1860struct GTY(()) tree_field_decl {
1861 struct tree_decl_common common;
1862
1863 tree offset;
1864 tree bit_field_type;
1865 tree qualifier;
1866 tree bit_offset;
1867 tree fcontext;
1868};
1869
1870struct GTY(()) tree_label_decl {
1871 struct tree_decl_with_rtl common;
1872 int label_decl_uid;
1873 int eh_landing_pad_nr;
1874};
1875
1876struct GTY(()) tree_result_decl {
1877 struct tree_decl_with_rtl common;
1878};
1879
1880struct GTY(()) tree_const_decl {
1881 struct tree_decl_common common;
1882};
1883
1884struct GTY(()) tree_parm_decl {
1885 struct tree_decl_with_rtl common;
1886 rtx incoming_rtl;
1887};
1888
1889struct GTY(()) tree_decl_with_vis {
1890 struct tree_decl_with_rtl common;
1891 tree assembler_name;
1892 struct symtab_node *symtab_node;
1893
1894 /* Belong to VAR_DECL exclusively. */
1895 unsigned defer_output : 1;
1896 unsigned hard_register : 1;
1897 unsigned common_flag : 1;
1898 unsigned in_text_section : 1;
1899 unsigned in_constant_pool : 1;
1900 unsigned dllimport_flag : 1;
1901 /* Don't belong to VAR_DECL exclusively. */
1902 unsigned weak_flag : 1;
1903
1904 unsigned seen_in_bind_expr : 1;
1905 unsigned comdat_flag : 1;
1906 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1907 ENUM_BITFIELD(symbol_visibility) visibility : 2;
1908 unsigned visibility_specified : 1;
1909
1910 /* Belong to FUNCTION_DECL exclusively. */
1911 unsigned init_priority_p : 1;
1912 /* Used by C++ only. Might become a generic decl flag. */
1913 unsigned shadowed_for_var_p : 1;
1914 /* Belong to FUNCTION_DECL exclusively. */
1915 unsigned cxx_constructor : 1;
1916 /* Belong to FUNCTION_DECL exclusively. */
1917 unsigned cxx_destructor : 1;
1918 /* Belong to FUNCTION_DECL exclusively. */
1919 unsigned final : 1;
1920 /* Belong to FUNCTION_DECL exclusively. */
1921 unsigned regdecl_flag : 1;
1922 /* 14 unused bits. */
1923 /* 32 more unused on 64 bit HW. */
1924};
1925
1926struct GTY(()) tree_var_decl {
1927 struct tree_decl_with_vis common;
1928};
1929
1930struct GTY(()) tree_decl_non_common {
1931 struct tree_decl_with_vis common;
1932 /* Almost all FE's use this. */
1933 tree result;
1934};
1935
1936/* Classify a special function declaration type. */
1937
1938enum function_decl_type
1939{
1940 NONE,
1941 OPERATOR_NEW,
1942 OPERATOR_DELETE,
1943 LAMBDA_FUNCTION
1944
1945 /* 0 values left */
1946};
1947
1948/* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1949 arguments/result/saved_tree fields by front ends. It was either inherit
1950 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1951 which seemed a bit strange. */
1952
1953struct GTY(()) tree_function_decl {
1954 struct tree_decl_non_common common;
1955
1956 struct function *f;
1957
1958 /* Arguments of the function. */
1959 tree arguments;
1960 /* The personality function. Used for stack unwinding. */
1961 tree personality;
1962
1963 /* Function specific options that are used by this function. */
1964 tree function_specific_target; /* target options */
1965 tree function_specific_optimization; /* optimization options */
1966
1967 /* Generic function body. */
1968 tree saved_tree;
1969 /* Index within a virtual table. */
1970 tree vindex;
1971
1972 /* In a FUNCTION_DECL this is DECL_UNCHECKED_FUNCTION_CODE. */
1973 unsigned int function_code;
1974
1975 ENUM_BITFIELD(built_in_class) built_in_class : 2;
1976 unsigned static_ctor_flag : 1;
1977 unsigned static_dtor_flag : 1;
1978 unsigned uninlinable : 1;
1979 unsigned possibly_inlined : 1;
1980 unsigned novops_flag : 1;
1981 unsigned returns_twice_flag : 1;
1982
1983 unsigned malloc_flag : 1;
1984 unsigned declared_inline_flag : 1;
1985 unsigned no_inline_warning_flag : 1;
1986 unsigned no_instrument_function_entry_exit : 1;
1987 unsigned no_limit_stack : 1;
1988 unsigned disregard_inline_limits : 1;
1989 unsigned pure_flag : 1;
1990 unsigned looping_const_or_pure_flag : 1;
1991
1992 /* Align the bitfield to boundary of a byte. */
1993 ENUM_BITFIELD(function_decl_type) decl_type: 2;
1994 unsigned has_debug_args_flag : 1;
1995 unsigned versioned_function : 1;
1996 unsigned replaceable_operator : 1;
1997
1998 /* 11 bits left for future expansion. */
1999 /* 32 bits on 64-bit HW. */
2000};
2001
2002struct GTY(()) tree_translation_unit_decl {
2003 struct tree_decl_common common;
2004 /* Source language of this translation unit. Used for DWARF output. */
2005 const char *language;
2006 /* TODO: Non-optimization used to build this translation unit. */
2007 /* TODO: Root of a partial DWARF tree for global types and decls. */
2008};
2009
2010struct GTY(()) tree_type_decl {
2011 struct tree_decl_non_common common;
2012
2013};
2014
2015struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
2016 {
2017 struct tree_statement_list_node *prev;
2018 struct tree_statement_list_node *next;
2019 tree stmt;
2020};
2021
2022struct GTY(()) tree_statement_list
2023 {
2024 struct tree_typed typed;
2025 struct tree_statement_list_node *head;
2026 struct tree_statement_list_node *tail;
2027};
2028
2029
2030/* Optimization options used by a function. */
2031
2032struct GTY(()) tree_optimization_option {
2033 struct tree_base base;
2034
2035 /* The optimization options used by the user. */
2036 struct cl_optimization *opts;
2037
2038 /* Target optabs for this set of optimization options. This is of
2039 type `struct target_optabs *'. */
2040 void *GTY ((atomic)) optabs;
2041
2042 /* The value of this_target_optabs against which the optabs above were
2043 generated. */
2044 struct target_optabs *GTY ((skip)) base_optabs;
2045};
2046
2047/* Forward declaration, defined in target-globals.h. */
2048
2049class GTY(()) target_globals;
2050
2051/* Target options used by a function. */
2052
2053struct GTY(()) tree_target_option {
2054 struct tree_base base;
2055
2056 /* Target globals for the corresponding target option. */
2057 class target_globals *globals;
2058
2059 /* The optimization options used by the user. */
2060 struct cl_target_option *opts;
2061};
2062
2063/* Define the overall contents of a tree node.
2064 It may be any of the structures declared above
2065 for various types of node. */
2066union GTY ((ptr_alias (union lang_tree_node),
2067 desc ("tree_node_structure (&%h)"), variable_size)) tree_node {
2068 struct tree_base GTY ((tag ("TS_BASE"))) base;
2069 struct tree_typed GTY ((tag ("TS_TYPED"))) typed;
2070 struct tree_common GTY ((tag ("TS_COMMON"))) common;
2071 struct tree_int_cst GTY ((tag ("TS_INT_CST"))) int_cst;
2072 struct tree_poly_int_cst GTY ((tag ("TS_POLY_INT_CST"))) poly_int_cst;
2073 struct tree_real_cst GTY ((tag ("TS_REAL_CST"))) real_cst;
2074 struct tree_fixed_cst GTY ((tag ("TS_FIXED_CST"))) fixed_cst;
2075 struct tree_vector GTY ((tag ("TS_VECTOR"))) vector;
2076 struct tree_string GTY ((tag ("TS_STRING"))) string;
2077 struct tree_complex GTY ((tag ("TS_COMPLEX"))) complex;
2078 struct tree_identifier GTY ((tag ("TS_IDENTIFIER"))) identifier;
2079 struct tree_decl_minimal GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal;
2080 struct tree_decl_common GTY ((tag ("TS_DECL_COMMON"))) decl_common;
2081 struct tree_decl_with_rtl GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl;
2082 struct tree_decl_non_common GTY ((tag ("TS_DECL_NON_COMMON")))
2083 decl_non_common;
2084 struct tree_parm_decl GTY ((tag ("TS_PARM_DECL"))) parm_decl;
2085 struct tree_decl_with_vis GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis;
2086 struct tree_var_decl GTY ((tag ("TS_VAR_DECL"))) var_decl;
2087 struct tree_field_decl GTY ((tag ("TS_FIELD_DECL"))) field_decl;
2088 struct tree_label_decl GTY ((tag ("TS_LABEL_DECL"))) label_decl;
2089 struct tree_result_decl GTY ((tag ("TS_RESULT_DECL"))) result_decl;
2090 struct tree_const_decl GTY ((tag ("TS_CONST_DECL"))) const_decl;
2091 struct tree_type_decl GTY ((tag ("TS_TYPE_DECL"))) type_decl;
2092 struct tree_function_decl GTY ((tag ("TS_FUNCTION_DECL"))) function_decl;
2093 struct tree_translation_unit_decl GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
2094 translation_unit_decl;
2095 struct tree_type_common GTY ((tag ("TS_TYPE_COMMON"))) type_common;
2096 struct tree_type_with_lang_specific GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
2097 type_with_lang_specific;
2098 struct tree_type_non_common GTY ((tag ("TS_TYPE_NON_COMMON")))
2099 type_non_common;
2100 struct tree_list GTY ((tag ("TS_LIST"))) list;
2101 struct tree_vec GTY ((tag ("TS_VEC"))) vec;
2102 struct tree_exp GTY ((tag ("TS_EXP"))) exp;
2103 struct tree_ssa_name GTY ((tag ("TS_SSA_NAME"))) ssa_name;
2104 struct tree_block GTY ((tag ("TS_BLOCK"))) block;
2105 struct tree_binfo GTY ((tag ("TS_BINFO"))) binfo;
2106 struct tree_statement_list GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list;
2107 struct tree_constructor GTY ((tag ("TS_CONSTRUCTOR"))) constructor;
2108 struct tree_omp_clause GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause;
2109 struct tree_optimization_option GTY ((tag ("TS_OPTIMIZATION"))) optimization;
2110 struct tree_target_option GTY ((tag ("TS_TARGET_OPTION"))) target_option;
2111};
2112
2113/* Structure describing an attribute and a function to handle it. */
2114struct attribute_spec {
2115 /* The name of the attribute (without any leading or trailing __),
2116 or NULL to mark the end of a table of attributes. */
2117 const char *name;
2118 /* The minimum length of the list of arguments of the attribute. */
2119 int min_length;
2120 /* The maximum length of the list of arguments of the attribute
2121 (-1 for no maximum). It can also be -2 for fake attributes
2122 created for the sake of -Wno-attributes; in that case, we
2123 should skip the balanced token sequence when parsing the attribute. */
2124 int max_length;
2125 /* Whether this attribute requires a DECL. If it does, it will be passed
2126 from types of DECLs, function return types and array element types to
2127 the DECLs, function types and array types respectively; but when
2128 applied to a type in any other circumstances, it will be ignored with
2129 a warning. (If greater control is desired for a given attribute,
2130 this should be false, and the flags argument to the handler may be
2131 used to gain greater control in that case.) */
2132 bool decl_required;
2133 /* Whether this attribute requires a type. If it does, it will be passed
2134 from a DECL to the type of that DECL. */
2135 bool type_required;
2136 /* Whether this attribute requires a function (or method) type. If it does,
2137 it will be passed from a function pointer type to the target type,
2138 and from a function return type (which is not itself a function
2139 pointer type) to the function type. */
2140 bool function_type_required;
2141 /* Specifies if attribute affects type's identity. */
2142 bool affects_type_identity;
2143 /* Function to handle this attribute. NODE points to a tree[3] array,
2144 where node[0] is the node to which the attribute is to be applied;
2145 node[1] is the last pushed/merged declaration if one exists, and node[2]
2146 may be the declaration for node[0]. If a DECL, it should be modified in
2147 place; if a TYPE, a copy should be created. NAME is the canonicalized
2148 name of the attribute i.e. without any leading or trailing underscores.
2149 ARGS is the TREE_LIST of the arguments (which may be NULL). FLAGS gives
2150 further information about the context of the attribute. Afterwards, the
2151 attributes will be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as
2152 appropriate, unless *NO_ADD_ATTRS is set to true (which should be done on
2153 error, as well as in any other cases when the attributes should not be
2154 added to the DECL or TYPE). Depending on FLAGS, any attributes to be
2155 applied to another type or DECL later may be returned;
2156 otherwise the return value should be NULL_TREE. This pointer may be
2157 NULL if no special handling is required beyond the checks implied
2158 by the rest of this structure. */
2159 tree (*handler) (tree *node, tree name, tree args,
2160 int flags, bool *no_add_attrs);
2161
2162 /* Specifies the name of an attribute that's mutually exclusive with
2163 this one, and whether the relationship applies to the function,
2164 variable, or type form of the attribute. */
2165 struct exclusions {
2166 const char *name;
2167 bool function;
2168 bool variable;
2169 bool type;
2170 };
2171
2172 /* An array of attribute exclusions describing names of other attributes
2173 that this attribute is mutually exclusive with. */
2174 const exclusions *exclude;
2175};
2176
2177/* These functions allow a front-end to perform a manual layout of a
2178 RECORD_TYPE. (For instance, if the placement of subsequent fields
2179 depends on the placement of fields so far.) Begin by calling
2180 start_record_layout. Then, call place_field for each of the
2181 fields. Then, call finish_record_layout. See layout_type for the
2182 default way in which these functions are used. */
2183typedef struct record_layout_info_s {
2184 /* The RECORD_TYPE that we are laying out. */
2185 tree t;
2186 /* The offset into the record so far, in bytes, not including bits in
2187 BITPOS. */
2188 tree offset;
2189 /* The last known alignment of SIZE. */
2190 unsigned int offset_align;
2191 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
2192 tree bitpos;
2193 /* The alignment of the record so far, in bits. */
2194 unsigned int record_align;
2195 /* The alignment of the record so far, ignoring #pragma pack and
2196 __attribute__ ((packed)), in bits. */
2197 unsigned int unpacked_align;
2198 /* The previous field laid out. */
2199 tree prev_field;
2200 /* The static variables (i.e., class variables, as opposed to
2201 instance variables) encountered in T. */
2202 vec<tree, va_gc> *pending_statics;
2203 /* Bits remaining in the current alignment group */
2204 int remaining_in_alignment;
2205 /* True if we've seen a packed field that didn't have normal
2206 alignment anyway. */
2207 int packed_maybe_necessary;
2208} *record_layout_info;
2209
2210/* Iterator for going through the function arguments. */
2211struct function_args_iterator {
2212 tree next; /* TREE_LIST pointing to the next argument */
2213};
2214
2215/* Structures to map from a tree to another tree. */
2216struct GTY(()) tree_map_base {
2217 tree from;
2218};
2219
2220/* Map from a tree to another tree. */
2221
2222struct GTY((for_user)) tree_map {
2223 struct tree_map_base base;
2224 unsigned int hash;
2225 tree to;
2226};
2227
2228/* Map from a decl tree to another tree. */
2229struct GTY((for_user)) tree_decl_map {
2230 struct tree_map_base base;
2231 tree to;
2232};
2233
2234/* Map from a tree to an int. */
2235struct GTY((for_user)) tree_int_map {
2236 struct tree_map_base base;
2237 unsigned int to;
2238};
2239
2240/* Map from a decl tree to a tree vector. */
2241struct GTY((for_user)) tree_vec_map {
2242 struct tree_map_base base;
2243 vec<tree, va_gc> *to;
2244};
2245
2246/* Abstract iterators for CALL_EXPRs. These static inline definitions
2247 have to go towards the end of tree.h so that union tree_node is fully
2248 defined by this point. */
2249
2250/* Structure containing iterator state. */
2251struct call_expr_arg_iterator {
2252 tree t; /* the call_expr */
2253 int n; /* argument count */
2254 int i; /* next argument index */
2255};
2256
2257struct const_call_expr_arg_iterator {
2258 const_tree t; /* the call_expr */
2259 int n; /* argument count */
2260 int i; /* next argument index */
2261};
2262
2263/* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
2264 function, and flags. */
2265struct GTY(()) builtin_info_type {
2266 tree decl;
2267 /* Whether the user can use <xxx> instead of explicitly using calls
2268 to __builtin_<xxx>. */
2269 unsigned implicit_p : 1;
2270 /* Whether the user has provided a declaration of <xxx>. */
2271 unsigned declared_p : 1;
2272};
2273
2274/* Information about a _FloatN or _FloatNx type that may be
2275 supported. */
2276struct floatn_type_info {
2277 /* The number N in the type name. */
2278 int n;
2279 /* Whether it is an extended type _FloatNx (true) or an interchange
2280 type (false). */
2281 bool extended;
2282};
2283
2284
2285/*---------------------------------------------------------------------------
2286 Global variables
2287---------------------------------------------------------------------------*/
2288/* Matrix describing the structures contained in a given tree code. */
2289extern bool tree_contains_struct[MAX_TREE_CODES][64];
2290
2291/* Class of tree given its code. */
2292#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
2293#define END_OF_BASE_TREE_CODES tcc_exceptional,
2294
2295#if __cpp_inline_variables < 201606L
2296template <int N>
2297struct tree_code_type_tmpl {
2298 static constexpr enum tree_code_class tree_code_type[] = {
2299#include "all-tree.def"
2300 };
2301};
2302
2303template <int N>
2304constexpr enum tree_code_class tree_code_type_tmpl<N>::tree_code_type[];
2305#else
2306constexpr inline enum tree_code_class tree_code_type[] = {
2307#include "all-tree.def"
2308};
2309#endif
2310
2311#undef DEFTREECODE
2312#undef END_OF_BASE_TREE_CODES
2313
2314/* Each tree code class has an associated string representation.
2315 These must correspond to the tree_code_class entries. */
2316extern const char *const tree_code_class_strings[];
2317
2318/* Number of argument-words in each kind of tree-node. */
2319
2320#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
2321#define END_OF_BASE_TREE_CODES 0,
2322
2323#if __cpp_inline_variables < 201606L
2324template <int N>
2325struct tree_code_length_tmpl {
2326 static constexpr unsigned char tree_code_length[] = {
2327#include "all-tree.def"
2328 };
2329};
2330
2331template <int N>
2332constexpr unsigned char tree_code_length_tmpl<N>::tree_code_length[];
2333#else
2334constexpr inline unsigned char tree_code_length[] = {
2335#include "all-tree.def"
2336};
2337#endif
2338
2339#undef DEFTREECODE
2340#undef END_OF_BASE_TREE_CODES
2341
2342/* Vector of all alias pairs for global symbols. */
2343extern GTY(()) vec<alias_pair, va_gc> *alias_pairs;
2344
2345/* Names of all the built_in classes. */
2346extern const char *const built_in_class_names[BUILT_IN_LAST];
2347
2348/* Names of all the built_in functions. */
2349extern const char * built_in_names[(int) END_BUILTINS];
2350
2351/* Number of operands and names for each OMP_CLAUSE node. */
2352extern unsigned const char omp_clause_num_ops[];
2353extern const char * const omp_clause_code_name[];
2354extern const char *user_omp_clause_code_name (tree, bool);
2355
2356/* A vector of all translation-units. */
2357extern GTY (()) vec<tree, va_gc> *all_translation_units;
2358
2359/* Vector of standard trees used by the C compiler. */
2360extern GTY(()) tree global_trees[TI_MAX];
2361
2362/* The standard C integer types. Use integer_type_kind to index into
2363 this array. */
2364extern GTY(()) tree integer_types[itk_none];
2365
2366/* Types used to represent sizes. */
2367extern GTY(()) tree sizetype_tab[(int) stk_type_kind_last];
2368
2369/* Arrays for keeping track of tree node statistics. */
2370extern uint64_t tree_node_counts[];
2371extern uint64_t tree_node_sizes[];
2372
2373/* True if we are in gimple form and the actions of the folders need to
2374 be restricted. False if we are not in gimple form and folding is not
2375 restricted to creating gimple expressions. */
2376extern bool in_gimple_form;
2377
2378/* Functional interface to the builtin functions. */
2379extern GTY(()) builtin_info_type builtin_info[(int)END_BUILTINS];
2380
2381/* If nonzero, an upper limit on alignment of structure fields, in bits, */
2382extern unsigned int maximum_field_alignment;
2383
2384/* Points to the FUNCTION_DECL of the function whose body we are reading. */
2385extern GTY(()) tree current_function_decl;
2386
2387/* Nonzero means a FUNC_BEGIN label was emitted. */
2388extern GTY(()) const char * current_function_func_begin_label;
2389
2390/* Information about the _FloatN and _FloatNx types. */
2391extern const floatn_type_info floatn_nx_types[NUM_FLOATN_NX_TYPES];
2392
2393#endif // GCC_TREE_CORE_H
2394

source code of gcc/tree-core.h