1/* Core data structures for the 'tree' type.
2 Copyright (C) 1989-2017 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 range_info_def;
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/* Nonzero if the argument is not dereferenced recursively, thus only
101 directly reachable memory is read or written. */
102#define EAF_DIRECT (1 << 0)
103
104/* Nonzero if memory reached by the argument is not clobbered. */
105#define EAF_NOCLOBBER (1 << 1)
106
107/* Nonzero if the argument does not escape. */
108#define EAF_NOESCAPE (1 << 2)
109
110/* Nonzero if the argument is not used by the function. */
111#define EAF_UNUSED (1 << 3)
112
113/* Call return flags. */
114/* Mask for the argument number that is returned. Lower two bits of
115 the return flags, encodes argument slots zero to three. */
116#define ERF_RETURN_ARG_MASK (3)
117
118/* Nonzero if the return value is equal to the argument number
119 flags & ERF_RETURN_ARG_MASK. */
120#define ERF_RETURNS_ARG (1 << 2)
121
122/* Nonzero if the return value does not alias with anything. Functions
123 with the malloc attribute have this set on their return value. */
124#define ERF_NOALIAS (1 << 3)
125
126
127/*---------------------------------------------------------------------------
128 Enumerations
129---------------------------------------------------------------------------*/
130/* Codes of tree nodes. */
131#define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM,
132#define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE,
133
134enum tree_code {
135#include "all-tree.def"
136MAX_TREE_CODES
137};
138
139#undef DEFTREECODE
140#undef END_OF_BASE_TREE_CODES
141
142/* Number of language-independent tree codes. */
143#define NUM_TREE_CODES \
144 ((int) LAST_AND_UNUSED_TREE_CODE)
145
146#define CODE_CONTAINS_STRUCT(CODE, STRUCT) \
147 (tree_contains_struct[(CODE)][(STRUCT)])
148
149
150/* Classify which part of the compiler has defined a given builtin function.
151 Note that we assume below that this is no more than two bits. */
152enum built_in_class {
153 NOT_BUILT_IN = 0,
154 BUILT_IN_FRONTEND,
155 BUILT_IN_MD,
156 BUILT_IN_NORMAL
157};
158
159/* Last marker used for LTO stremaing of built_in_class. We can not add it
160 to the enum since we need the enumb to fit in 2 bits. */
161#define BUILT_IN_LAST (BUILT_IN_NORMAL + 1)
162
163/* Codes that identify the various built in functions
164 so that expand_call can identify them quickly. */
165#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
166enum built_in_function {
167#include "builtins.def"
168
169 BEGIN_CHKP_BUILTINS,
170
171#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
172#define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
173 ENUM##_CHKP = ENUM + BEGIN_CHKP_BUILTINS + 1,
174#include "builtins.def"
175
176 END_CHKP_BUILTINS = BEGIN_CHKP_BUILTINS * 2 + 1,
177
178 /* Complex division routines in libgcc. These are done via builtins
179 because emit_library_call_value can't handle complex values. */
180 BUILT_IN_COMPLEX_MUL_MIN,
181 BUILT_IN_COMPLEX_MUL_MAX
182 = BUILT_IN_COMPLEX_MUL_MIN
183 + MAX_MODE_COMPLEX_FLOAT
184 - MIN_MODE_COMPLEX_FLOAT,
185
186 BUILT_IN_COMPLEX_DIV_MIN,
187 BUILT_IN_COMPLEX_DIV_MAX
188 = BUILT_IN_COMPLEX_DIV_MIN
189 + MAX_MODE_COMPLEX_FLOAT
190 - MIN_MODE_COMPLEX_FLOAT,
191
192 /* Upper bound on non-language-specific builtins. */
193 END_BUILTINS
194};
195
196/* Internal functions. */
197enum internal_fn {
198#define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE,
199#include "internal-fn.def"
200 IFN_LAST
201};
202
203/* An enum that combines target-independent built-in functions with
204 internal functions, so that they can be treated in a similar way.
205 The numbers for built-in functions are the same as for the
206 built_in_function enum. The numbers for internal functions
207 start at END_BUITLINS. */
208enum combined_fn {
209#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
210 CFN_##ENUM = int (ENUM),
211#include "builtins.def"
212
213#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND)
214#define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
215 CFN_##ENUM##_CHKP = int (ENUM##_CHKP),
216#include "builtins.def"
217
218#define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) \
219 CFN_##CODE = int (END_BUILTINS) + int (IFN_##CODE),
220#include "internal-fn.def"
221
222 CFN_LAST
223};
224
225/* Tree code classes. Each tree_code has an associated code class
226 represented by a TREE_CODE_CLASS. */
227enum tree_code_class {
228 tcc_exceptional, /* An exceptional code (fits no category). */
229 tcc_constant, /* A constant. */
230 /* Order of tcc_type and tcc_declaration is important. */
231 tcc_type, /* A type object code. */
232 tcc_declaration, /* A declaration (also serving as variable refs). */
233 tcc_reference, /* A reference to storage. */
234 tcc_comparison, /* A comparison expression. */
235 tcc_unary, /* A unary arithmetic expression. */
236 tcc_binary, /* A binary arithmetic expression. */
237 tcc_statement, /* A statement expression, which have side effects
238 but usually no interesting value. */
239 tcc_vl_exp, /* A function call or other expression with a
240 variable-length operand vector. */
241 tcc_expression /* Any other expression. */
242};
243
244/* OMP_CLAUSE codes. Do not reorder, as this is used to index into
245 the tables omp_clause_num_ops and omp_clause_code_name. */
246enum omp_clause_code {
247 /* Clause zero is special-cased inside the parser
248 (c_parser_omp_variable_list). */
249 OMP_CLAUSE_ERROR = 0,
250
251 /* OpenACC/OpenMP clause: private (variable_list). */
252 OMP_CLAUSE_PRIVATE,
253
254 /* OpenMP clause: shared (variable_list). */
255 OMP_CLAUSE_SHARED,
256
257 /* OpenACC/OpenMP clause: firstprivate (variable_list). */
258 OMP_CLAUSE_FIRSTPRIVATE,
259
260 /* OpenMP clause: lastprivate (variable_list). */
261 OMP_CLAUSE_LASTPRIVATE,
262
263 /* OpenACC/OpenMP clause: reduction (operator:variable_list).
264 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
265 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
266 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var
267 into the shared one.
268 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
269 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}.
270 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy
271 VAR_DECL placeholder, used like the above for C/C++ array
272 reductions. */
273 OMP_CLAUSE_REDUCTION,
274
275 /* OpenMP clause: copyin (variable_list). */
276 OMP_CLAUSE_COPYIN,
277
278 /* OpenMP clause: copyprivate (variable_list). */
279 OMP_CLAUSE_COPYPRIVATE,
280
281 /* OpenMP clause: linear (variable-list[:linear-step]). */
282 OMP_CLAUSE_LINEAR,
283
284 /* OpenMP clause: aligned (variable-list[:alignment]). */
285 OMP_CLAUSE_ALIGNED,
286
287 /* OpenMP clause: depend ({in,out,inout}:variable-list). */
288 OMP_CLAUSE_DEPEND,
289
290 /* OpenMP clause: uniform (argument-list). */
291 OMP_CLAUSE_UNIFORM,
292
293 /* OpenMP clause: to (extended-list).
294 Only when it appears in declare target. */
295 OMP_CLAUSE_TO_DECLARE,
296
297 /* OpenMP clause: link (variable-list). */
298 OMP_CLAUSE_LINK,
299
300 /* OpenMP clause: from (variable-list). */
301 OMP_CLAUSE_FROM,
302
303 /* OpenMP clause: to (variable-list). */
304 OMP_CLAUSE_TO,
305
306 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr,
307 device, host (self), present, present_or_copy (pcopy), present_or_copyin
308 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)}
309 (variable-list).
310
311 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */
312 OMP_CLAUSE_MAP,
313
314 /* OpenACC clause: use_device (variable_list).
315 OpenMP clause: use_device_ptr (variable-list). */
316 OMP_CLAUSE_USE_DEVICE_PTR,
317
318 /* OpenMP clause: is_device_ptr (variable-list). */
319 OMP_CLAUSE_IS_DEVICE_PTR,
320
321 /* Internal structure to hold OpenACC cache directive's variable-list.
322 #pragma acc cache (variable-list). */
323 OMP_CLAUSE__CACHE_,
324
325 /* OpenACC clause: gang [(gang-argument-list)].
326 Where
327 gang-argument-list: [gang-argument-list, ] gang-argument
328 gang-argument: [num:] integer-expression
329 | static: size-expression
330 size-expression: * | integer-expression. */
331 OMP_CLAUSE_GANG,
332
333 /* OpenACC clause: async [(integer-expression)]. */
334 OMP_CLAUSE_ASYNC,
335
336 /* OpenACC clause: wait [(integer-expression-list)]. */
337 OMP_CLAUSE_WAIT,
338
339 /* OpenACC clause: auto. */
340 OMP_CLAUSE_AUTO,
341
342 /* OpenACC clause: seq. */
343 OMP_CLAUSE_SEQ,
344
345 /* Internal clause: temporary for combined loops expansion. */
346 OMP_CLAUSE__LOOPTEMP_,
347
348 /* OpenACC/OpenMP clause: if (scalar-expression). */
349 OMP_CLAUSE_IF,
350
351 /* OpenMP clause: num_threads (integer-expression). */
352 OMP_CLAUSE_NUM_THREADS,
353
354 /* OpenMP clause: schedule. */
355 OMP_CLAUSE_SCHEDULE,
356
357 /* OpenMP clause: nowait. */
358 OMP_CLAUSE_NOWAIT,
359
360 /* OpenMP clause: ordered [(constant-integer-expression)]. */
361 OMP_CLAUSE_ORDERED,
362
363 /* OpenACC/OpenMP clause: default. */
364 OMP_CLAUSE_DEFAULT,
365
366 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */
367 OMP_CLAUSE_COLLAPSE,
368
369 /* OpenMP clause: untied. */
370 OMP_CLAUSE_UNTIED,
371
372 /* OpenMP clause: final (scalar-expression). */
373 OMP_CLAUSE_FINAL,
374
375 /* OpenMP clause: mergeable. */
376 OMP_CLAUSE_MERGEABLE,
377
378 /* OpenMP clause: device (integer-expression). */
379 OMP_CLAUSE_DEVICE,
380
381 /* OpenMP clause: dist_schedule (static[:chunk-size]). */
382 OMP_CLAUSE_DIST_SCHEDULE,
383
384 /* OpenMP clause: inbranch. */
385 OMP_CLAUSE_INBRANCH,
386
387 /* OpenMP clause: notinbranch. */
388 OMP_CLAUSE_NOTINBRANCH,
389
390 /* OpenMP clause: num_teams(integer-expression). */
391 OMP_CLAUSE_NUM_TEAMS,
392
393 /* OpenMP clause: thread_limit(integer-expression). */
394 OMP_CLAUSE_THREAD_LIMIT,
395
396 /* OpenMP clause: proc_bind ({master,close,spread}). */
397 OMP_CLAUSE_PROC_BIND,
398
399 /* OpenMP clause: safelen (constant-integer-expression). */
400 OMP_CLAUSE_SAFELEN,
401
402 /* OpenMP clause: simdlen (constant-integer-expression). */
403 OMP_CLAUSE_SIMDLEN,
404
405 /* OpenMP clause: for. */
406 OMP_CLAUSE_FOR,
407
408 /* OpenMP clause: parallel. */
409 OMP_CLAUSE_PARALLEL,
410
411 /* OpenMP clause: sections. */
412 OMP_CLAUSE_SECTIONS,
413
414 /* OpenMP clause: taskgroup. */
415 OMP_CLAUSE_TASKGROUP,
416
417 /* OpenMP clause: priority (integer-expression). */
418 OMP_CLAUSE_PRIORITY,
419
420 /* OpenMP clause: grainsize (integer-expression). */
421 OMP_CLAUSE_GRAINSIZE,
422
423 /* OpenMP clause: num_tasks (integer-expression). */
424 OMP_CLAUSE_NUM_TASKS,
425
426 /* OpenMP clause: nogroup. */
427 OMP_CLAUSE_NOGROUP,
428
429 /* OpenMP clause: threads. */
430 OMP_CLAUSE_THREADS,
431
432 /* OpenMP clause: simd. */
433 OMP_CLAUSE_SIMD,
434
435 /* OpenMP clause: hint (integer-expression). */
436 OMP_CLAUSE_HINT,
437
438 /* OpenMP clause: defaultmap (tofrom: scalar). */
439 OMP_CLAUSE_DEFAULTMAP,
440
441 /* Internally used only clause, holding SIMD uid. */
442 OMP_CLAUSE__SIMDUID_,
443
444 /* Internally used only clause, flag whether this is SIMT simd
445 loop or not. */
446 OMP_CLAUSE__SIMT_,
447
448 /* OpenACC clause: independent. */
449 OMP_CLAUSE_INDEPENDENT,
450
451 /* OpenACC clause: worker [( [num:] integer-expression)]. */
452 OMP_CLAUSE_WORKER,
453
454 /* OpenACC clause: vector [( [length:] integer-expression)]. */
455 OMP_CLAUSE_VECTOR,
456
457 /* OpenACC clause: num_gangs (integer-expression). */
458 OMP_CLAUSE_NUM_GANGS,
459
460 /* OpenACC clause: num_workers (integer-expression). */
461 OMP_CLAUSE_NUM_WORKERS,
462
463 /* OpenACC clause: vector_length (integer-expression). */
464 OMP_CLAUSE_VECTOR_LENGTH,
465
466 /* OpenACC clause: tile ( size-expr-list ). */
467 OMP_CLAUSE_TILE,
468
469 /* OpenMP internal-only clause to specify grid dimensions of a gridified
470 kernel. */
471 OMP_CLAUSE__GRIDDIM_
472};
473
474#undef DEFTREESTRUCT
475#define DEFTREESTRUCT(ENUM, NAME) ENUM,
476enum tree_node_structure_enum {
477#include "treestruct.def"
478 LAST_TS_ENUM
479};
480#undef DEFTREESTRUCT
481
482enum omp_clause_schedule_kind {
483 OMP_CLAUSE_SCHEDULE_STATIC,
484 OMP_CLAUSE_SCHEDULE_DYNAMIC,
485 OMP_CLAUSE_SCHEDULE_GUIDED,
486 OMP_CLAUSE_SCHEDULE_AUTO,
487 OMP_CLAUSE_SCHEDULE_RUNTIME,
488 OMP_CLAUSE_SCHEDULE_MASK = (1 << 3) - 1,
489 OMP_CLAUSE_SCHEDULE_MONOTONIC = (1 << 3),
490 OMP_CLAUSE_SCHEDULE_NONMONOTONIC = (1 << 4),
491 OMP_CLAUSE_SCHEDULE_LAST = 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC - 1
492};
493
494enum omp_clause_default_kind {
495 OMP_CLAUSE_DEFAULT_UNSPECIFIED,
496 OMP_CLAUSE_DEFAULT_SHARED,
497 OMP_CLAUSE_DEFAULT_NONE,
498 OMP_CLAUSE_DEFAULT_PRIVATE,
499 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE,
500 OMP_CLAUSE_DEFAULT_PRESENT,
501 OMP_CLAUSE_DEFAULT_LAST
502};
503
504/* There is a TYPE_QUAL value for each type qualifier. They can be
505 combined by bitwise-or to form the complete set of qualifiers for a
506 type. */
507enum cv_qualifier {
508 TYPE_UNQUALIFIED = 0x0,
509 TYPE_QUAL_CONST = 0x1,
510 TYPE_QUAL_VOLATILE = 0x2,
511 TYPE_QUAL_RESTRICT = 0x4,
512 TYPE_QUAL_ATOMIC = 0x8
513};
514
515/* Standard named or nameless data types of the C compiler. */
516enum tree_index {
517 TI_ERROR_MARK,
518 TI_INTQI_TYPE,
519 TI_INTHI_TYPE,
520 TI_INTSI_TYPE,
521 TI_INTDI_TYPE,
522 TI_INTTI_TYPE,
523
524 TI_UINTQI_TYPE,
525 TI_UINTHI_TYPE,
526 TI_UINTSI_TYPE,
527 TI_UINTDI_TYPE,
528 TI_UINTTI_TYPE,
529
530 TI_ATOMICQI_TYPE,
531 TI_ATOMICHI_TYPE,
532 TI_ATOMICSI_TYPE,
533 TI_ATOMICDI_TYPE,
534 TI_ATOMICTI_TYPE,
535
536 TI_UINT16_TYPE,
537 TI_UINT32_TYPE,
538 TI_UINT64_TYPE,
539
540 TI_VOID,
541
542 TI_INTEGER_ZERO,
543 TI_INTEGER_ONE,
544 TI_INTEGER_THREE,
545 TI_INTEGER_MINUS_ONE,
546 TI_NULL_POINTER,
547
548 TI_SIZE_ZERO,
549 TI_SIZE_ONE,
550
551 TI_BITSIZE_ZERO,
552 TI_BITSIZE_ONE,
553 TI_BITSIZE_UNIT,
554
555 TI_PUBLIC,
556 TI_PROTECTED,
557 TI_PRIVATE,
558
559 TI_BOOLEAN_FALSE,
560 TI_BOOLEAN_TRUE,
561
562 TI_FLOAT_TYPE,
563 TI_DOUBLE_TYPE,
564 TI_LONG_DOUBLE_TYPE,
565
566 /* The _FloatN and _FloatNx types must be consecutive, and in the
567 same sequence as the corresponding complex types, which must also
568 be consecutive; _FloatN must come before _FloatNx; the order must
569 also be the same as in the floatn_nx_types array and the RID_*
570 values in c-common.h. This is so that iterations over these
571 types work as intended. */
572 TI_FLOAT16_TYPE,
573 TI_FLOATN_TYPE_FIRST = TI_FLOAT16_TYPE,
574 TI_FLOATN_NX_TYPE_FIRST = TI_FLOAT16_TYPE,
575 TI_FLOAT32_TYPE,
576 TI_FLOAT64_TYPE,
577 TI_FLOAT128_TYPE,
578 TI_FLOATN_TYPE_LAST = TI_FLOAT128_TYPE,
579#define NUM_FLOATN_TYPES (TI_FLOATN_TYPE_LAST - TI_FLOATN_TYPE_FIRST + 1)
580 TI_FLOAT32X_TYPE,
581 TI_FLOATNX_TYPE_FIRST = TI_FLOAT32X_TYPE,
582 TI_FLOAT64X_TYPE,
583 TI_FLOAT128X_TYPE,
584 TI_FLOATNX_TYPE_LAST = TI_FLOAT128X_TYPE,
585 TI_FLOATN_NX_TYPE_LAST = TI_FLOAT128X_TYPE,
586#define NUM_FLOATNX_TYPES (TI_FLOATNX_TYPE_LAST - TI_FLOATNX_TYPE_FIRST + 1)
587#define NUM_FLOATN_NX_TYPES (TI_FLOATN_NX_TYPE_LAST \
588 - TI_FLOATN_NX_TYPE_FIRST \
589 + 1)
590
591 /* Put the complex types after their component types, so that in (sequential)
592 tree streaming we can assert that their component types have already been
593 handled (see tree-streamer.c:record_common_node). */
594 TI_COMPLEX_INTEGER_TYPE,
595 TI_COMPLEX_FLOAT_TYPE,
596 TI_COMPLEX_DOUBLE_TYPE,
597 TI_COMPLEX_LONG_DOUBLE_TYPE,
598
599 TI_COMPLEX_FLOAT16_TYPE,
600 TI_COMPLEX_FLOATN_NX_TYPE_FIRST = TI_COMPLEX_FLOAT16_TYPE,
601 TI_COMPLEX_FLOAT32_TYPE,
602 TI_COMPLEX_FLOAT64_TYPE,
603 TI_COMPLEX_FLOAT128_TYPE,
604 TI_COMPLEX_FLOAT32X_TYPE,
605 TI_COMPLEX_FLOAT64X_TYPE,
606 TI_COMPLEX_FLOAT128X_TYPE,
607
608 TI_FLOAT_PTR_TYPE,
609 TI_DOUBLE_PTR_TYPE,
610 TI_LONG_DOUBLE_PTR_TYPE,
611 TI_INTEGER_PTR_TYPE,
612
613 TI_VOID_TYPE,
614 TI_PTR_TYPE,
615 TI_CONST_PTR_TYPE,
616 TI_SIZE_TYPE,
617 TI_PID_TYPE,
618 TI_PTRDIFF_TYPE,
619 TI_VA_LIST_TYPE,
620 TI_VA_LIST_GPR_COUNTER_FIELD,
621 TI_VA_LIST_FPR_COUNTER_FIELD,
622 TI_BOOLEAN_TYPE,
623 TI_FILEPTR_TYPE,
624 TI_CONST_TM_PTR_TYPE,
625 TI_FENV_T_PTR_TYPE,
626 TI_CONST_FENV_T_PTR_TYPE,
627 TI_FEXCEPT_T_PTR_TYPE,
628 TI_CONST_FEXCEPT_T_PTR_TYPE,
629 TI_POINTER_SIZED_TYPE,
630
631 TI_POINTER_BOUNDS_TYPE,
632
633 TI_DFLOAT32_TYPE,
634 TI_DFLOAT64_TYPE,
635 TI_DFLOAT128_TYPE,
636 TI_DFLOAT32_PTR_TYPE,
637 TI_DFLOAT64_PTR_TYPE,
638 TI_DFLOAT128_PTR_TYPE,
639
640 TI_VOID_LIST_NODE,
641
642 TI_MAIN_IDENTIFIER,
643
644 TI_SAT_SFRACT_TYPE,
645 TI_SAT_FRACT_TYPE,
646 TI_SAT_LFRACT_TYPE,
647 TI_SAT_LLFRACT_TYPE,
648 TI_SAT_USFRACT_TYPE,
649 TI_SAT_UFRACT_TYPE,
650 TI_SAT_ULFRACT_TYPE,
651 TI_SAT_ULLFRACT_TYPE,
652 TI_SFRACT_TYPE,
653 TI_FRACT_TYPE,
654 TI_LFRACT_TYPE,
655 TI_LLFRACT_TYPE,
656 TI_USFRACT_TYPE,
657 TI_UFRACT_TYPE,
658 TI_ULFRACT_TYPE,
659 TI_ULLFRACT_TYPE,
660 TI_SAT_SACCUM_TYPE,
661 TI_SAT_ACCUM_TYPE,
662 TI_SAT_LACCUM_TYPE,
663 TI_SAT_LLACCUM_TYPE,
664 TI_SAT_USACCUM_TYPE,
665 TI_SAT_UACCUM_TYPE,
666 TI_SAT_ULACCUM_TYPE,
667 TI_SAT_ULLACCUM_TYPE,
668 TI_SACCUM_TYPE,
669 TI_ACCUM_TYPE,
670 TI_LACCUM_TYPE,
671 TI_LLACCUM_TYPE,
672 TI_USACCUM_TYPE,
673 TI_UACCUM_TYPE,
674 TI_ULACCUM_TYPE,
675 TI_ULLACCUM_TYPE,
676 TI_QQ_TYPE,
677 TI_HQ_TYPE,
678 TI_SQ_TYPE,
679 TI_DQ_TYPE,
680 TI_TQ_TYPE,
681 TI_UQQ_TYPE,
682 TI_UHQ_TYPE,
683 TI_USQ_TYPE,
684 TI_UDQ_TYPE,
685 TI_UTQ_TYPE,
686 TI_SAT_QQ_TYPE,
687 TI_SAT_HQ_TYPE,
688 TI_SAT_SQ_TYPE,
689 TI_SAT_DQ_TYPE,
690 TI_SAT_TQ_TYPE,
691 TI_SAT_UQQ_TYPE,
692 TI_SAT_UHQ_TYPE,
693 TI_SAT_USQ_TYPE,
694 TI_SAT_UDQ_TYPE,
695 TI_SAT_UTQ_TYPE,
696 TI_HA_TYPE,
697 TI_SA_TYPE,
698 TI_DA_TYPE,
699 TI_TA_TYPE,
700 TI_UHA_TYPE,
701 TI_USA_TYPE,
702 TI_UDA_TYPE,
703 TI_UTA_TYPE,
704 TI_SAT_HA_TYPE,
705 TI_SAT_SA_TYPE,
706 TI_SAT_DA_TYPE,
707 TI_SAT_TA_TYPE,
708 TI_SAT_UHA_TYPE,
709 TI_SAT_USA_TYPE,
710 TI_SAT_UDA_TYPE,
711 TI_SAT_UTA_TYPE,
712
713 TI_OPTIMIZATION_DEFAULT,
714 TI_OPTIMIZATION_CURRENT,
715 TI_TARGET_OPTION_DEFAULT,
716 TI_TARGET_OPTION_CURRENT,
717 TI_CURRENT_TARGET_PRAGMA,
718 TI_CURRENT_OPTIMIZE_PRAGMA,
719
720 TI_MAX
721};
722
723/* An enumeration of the standard C integer types. These must be
724 ordered so that shorter types appear before longer ones, and so
725 that signed types appear before unsigned ones, for the correct
726 functioning of interpret_integer() in c-lex.c. */
727enum integer_type_kind {
728 itk_char,
729 itk_signed_char,
730 itk_unsigned_char,
731 itk_short,
732 itk_unsigned_short,
733 itk_int,
734 itk_unsigned_int,
735 itk_long,
736 itk_unsigned_long,
737 itk_long_long,
738 itk_unsigned_long_long,
739
740 itk_intN_0,
741 itk_unsigned_intN_0,
742 itk_intN_1,
743 itk_unsigned_intN_1,
744 itk_intN_2,
745 itk_unsigned_intN_2,
746 itk_intN_3,
747 itk_unsigned_intN_3,
748
749 itk_none
750};
751
752/* A pointer-to-function member type looks like:
753
754 struct {
755 __P __pfn;
756 ptrdiff_t __delta;
757 };
758
759 If __pfn is NULL, it is a NULL pointer-to-member-function.
760
761 (Because the vtable is always the first thing in the object, we
762 don't need its offset.) If the function is virtual, then PFN is
763 one plus twice the index into the vtable; otherwise, it is just a
764 pointer to the function.
765
766 Unfortunately, using the lowest bit of PFN doesn't work in
767 architectures that don't impose alignment requirements on function
768 addresses, or that use the lowest bit to tell one ISA from another,
769 for example. For such architectures, we use the lowest bit of
770 DELTA instead of the lowest bit of the PFN, and DELTA will be
771 multiplied by 2. */
772enum ptrmemfunc_vbit_where_t {
773 ptrmemfunc_vbit_in_pfn,
774 ptrmemfunc_vbit_in_delta
775};
776
777/* Flags that may be passed in the third argument of decl_attributes, and
778 to handler functions for attributes. */
779enum attribute_flags {
780 /* The type passed in is the type of a DECL, and any attributes that
781 should be passed in again to be applied to the DECL rather than the
782 type should be returned. */
783 ATTR_FLAG_DECL_NEXT = 1,
784 /* The type passed in is a function return type, and any attributes that
785 should be passed in again to be applied to the function type rather
786 than the return type should be returned. */
787 ATTR_FLAG_FUNCTION_NEXT = 2,
788 /* The type passed in is an array element type, and any attributes that
789 should be passed in again to be applied to the array type rather
790 than the element type should be returned. */
791 ATTR_FLAG_ARRAY_NEXT = 4,
792 /* The type passed in is a structure, union or enumeration type being
793 created, and should be modified in place. */
794 ATTR_FLAG_TYPE_IN_PLACE = 8,
795 /* The attributes are being applied by default to a library function whose
796 name indicates known behavior, and should be silently ignored if they
797 are not in fact compatible with the function type. */
798 ATTR_FLAG_BUILT_IN = 16,
799 /* A given attribute has been parsed as a C++-11 attribute. */
800 ATTR_FLAG_CXX11 = 32
801};
802
803/* Types used to represent sizes. */
804enum size_type_kind {
805 stk_sizetype, /* Normal representation of sizes in bytes. */
806 stk_ssizetype, /* Signed representation of sizes in bytes. */
807 stk_bitsizetype, /* Normal representation of sizes in bits. */
808 stk_sbitsizetype, /* Signed representation of sizes in bits. */
809 stk_type_kind_last
810};
811
812enum operand_equal_flag {
813 OEP_ONLY_CONST = 1,
814 OEP_PURE_SAME = 2,
815 OEP_MATCH_SIDE_EFFECTS = 4,
816 OEP_ADDRESS_OF = 8,
817 /* Internal within operand_equal_p: */
818 OEP_NO_HASH_CHECK = 16,
819 /* Internal within inchash::add_expr: */
820 OEP_HASH_CHECK = 32,
821 /* Makes operand_equal_p handle more expressions: */
822 OEP_LEXICOGRAPHIC = 64
823};
824
825/* Enum and arrays used for tree allocation stats.
826 Keep in sync with tree.c:tree_node_kind_names. */
827enum tree_node_kind {
828 d_kind,
829 t_kind,
830 b_kind,
831 s_kind,
832 r_kind,
833 e_kind,
834 c_kind,
835 id_kind,
836 vec_kind,
837 binfo_kind,
838 ssa_name_kind,
839 constr_kind,
840 x_kind,
841 lang_decl,
842 lang_type,
843 omp_clause_kind,
844 all_kinds
845};
846
847enum annot_expr_kind {
848 annot_expr_ivdep_kind,
849 annot_expr_unroll_kind,
850 annot_expr_no_vector_kind,
851 annot_expr_vector_kind,
852 annot_expr_parallel_kind,
853 annot_expr_kind_last
854};
855
856/*---------------------------------------------------------------------------
857 Type definitions
858---------------------------------------------------------------------------*/
859/* When processing aliases at the symbol table level, we need the
860 declaration of target. For this reason we need to queue aliases and
861 process them after all declarations has been produced. */
862struct GTY(()) alias_pair {
863 tree decl;
864 tree target;
865};
866
867/* An initialization priority. */
868typedef unsigned short priority_type;
869
870/* The type of a callback function for walking over tree structure. */
871typedef tree (*walk_tree_fn) (tree *, int *, void *);
872
873/* The type of a callback function that represents a custom walk_tree. */
874typedef tree (*walk_tree_lh) (tree *, int *, tree (*) (tree *, int *, void *),
875 void *, hash_set<tree> *);
876
877
878/*---------------------------------------------------------------------------
879 Main data structures
880---------------------------------------------------------------------------*/
881/* A tree node can represent a data type, a variable, an expression
882 or a statement. Each node has a TREE_CODE which says what kind of
883 thing it represents. Some common codes are:
884 INTEGER_TYPE -- represents a type of integers.
885 ARRAY_TYPE -- represents a type of pointer.
886 VAR_DECL -- represents a declared variable.
887 INTEGER_CST -- represents a constant integer value.
888 PLUS_EXPR -- represents a sum (an expression).
889
890 As for the contents of a tree node: there are some fields
891 that all nodes share. Each TREE_CODE has various special-purpose
892 fields as well. The fields of a node are never accessed directly,
893 always through accessor macros. */
894
895/* Every kind of tree node starts with this structure,
896 so all nodes have these fields.
897
898 See the accessor macros, defined below, for documentation of the
899 fields, and the table below which connects the fields and the
900 accessor macros. */
901
902struct GTY(()) tree_base {
903 ENUM_BITFIELD(tree_code) code : 16;
904
905 unsigned side_effects_flag : 1;
906 unsigned constant_flag : 1;
907 unsigned addressable_flag : 1;
908 unsigned volatile_flag : 1;
909 unsigned readonly_flag : 1;
910 unsigned asm_written_flag: 1;
911 unsigned nowarning_flag : 1;
912 unsigned visited : 1;
913
914 unsigned used_flag : 1;
915 unsigned nothrow_flag : 1;
916 unsigned static_flag : 1;
917 unsigned public_flag : 1;
918 unsigned private_flag : 1;
919 unsigned protected_flag : 1;
920 unsigned deprecated_flag : 1;
921 unsigned default_def_flag : 1;
922
923 union {
924 /* The bits in the following structure should only be used with
925 accessor macros that constrain inputs with tree checking. */
926 struct {
927 unsigned lang_flag_0 : 1;
928 unsigned lang_flag_1 : 1;
929 unsigned lang_flag_2 : 1;
930 unsigned lang_flag_3 : 1;
931 unsigned lang_flag_4 : 1;
932 unsigned lang_flag_5 : 1;
933 unsigned lang_flag_6 : 1;
934 unsigned saturating_flag : 1;
935
936 unsigned unsigned_flag : 1;
937 unsigned packed_flag : 1;
938 unsigned user_align : 1;
939 unsigned nameless_flag : 1;
940 unsigned atomic_flag : 1;
941 unsigned spare0 : 3;
942
943 unsigned spare1 : 8;
944
945 /* This field is only used with TREE_TYPE nodes; the only reason it is
946 present in tree_base instead of tree_type is to save space. The size
947 of the field must be large enough to hold addr_space_t values. */
948 unsigned address_space : 8;
949 } bits;
950
951 /* The following fields are present in tree_base to save space. The
952 nodes using them do not require any of the flags above and so can
953 make better use of the 4-byte sized word. */
954
955 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */
956 struct {
957 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
958 its native precision. */
959 unsigned char unextended;
960
961 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to
962 wider precisions based on its TYPE_SIGN. */
963 unsigned char extended;
964
965 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in
966 offset_int precision, with smaller integers being extended
967 according to their TYPE_SIGN. This is equal to one of the two
968 fields above but is cached for speed. */
969 unsigned char offset;
970 } int_length;
971
972 /* VEC length. This field is only used with TREE_VEC. */
973 int length;
974
975 /* This field is only used with VECTOR_CST. */
976 struct {
977 /* The value of VECTOR_CST_LOG2_NPATTERNS. */
978 unsigned int log2_npatterns : 8;
979
980 /* The value of VECTOR_CST_NELTS_PER_PATTERN. */
981 unsigned int nelts_per_pattern : 8;
982
983 /* For future expansion. */
984 unsigned int unused : 16;
985 } vector_cst;
986
987 /* SSA version number. This field is only used with SSA_NAME. */
988 unsigned int version;
989
990 /* CHREC_VARIABLE. This field is only used with POLYNOMIAL_CHREC. */
991 unsigned int chrec_var;
992
993 /* Internal function code. */
994 enum internal_fn ifn;
995
996 /* The following two fields are used for MEM_REF and TARGET_MEM_REF
997 expression trees and specify known data non-dependences. For
998 two memory references in a function they are known to not
999 alias if dependence_info.clique are equal and dependence_info.base
1000 are distinct. */
1001 struct {
1002 unsigned short clique;
1003 unsigned short base;
1004 } dependence_info;
1005 } GTY((skip(""))) u;
1006};
1007
1008/* The following table lists the uses of each of the above flags and
1009 for which types of nodes they are defined.
1010
1011 addressable_flag:
1012
1013 TREE_ADDRESSABLE in
1014 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL
1015 SSA_NAME
1016 all types
1017 CONSTRUCTOR, IDENTIFIER_NODE
1018 STMT_EXPR
1019
1020 CALL_EXPR_TAILCALL in
1021 CALL_EXPR
1022
1023 CASE_LOW_SEEN in
1024 CASE_LABEL_EXPR
1025
1026 PREDICT_EXPR_OUTCOME in
1027 PREDICT_EXPR
1028
1029 static_flag:
1030
1031 TREE_STATIC in
1032 VAR_DECL, FUNCTION_DECL
1033 CONSTRUCTOR
1034
1035 TREE_NO_TRAMPOLINE in
1036 ADDR_EXPR
1037
1038 BINFO_VIRTUAL_P in
1039 TREE_BINFO
1040
1041 TREE_SYMBOL_REFERENCED in
1042 IDENTIFIER_NODE
1043
1044 CLEANUP_EH_ONLY in
1045 TARGET_EXPR, WITH_CLEANUP_EXPR
1046
1047 TRY_CATCH_IS_CLEANUP in
1048 TRY_CATCH_EXPR
1049
1050 ASM_INPUT_P in
1051 ASM_EXPR
1052
1053 TYPE_REF_CAN_ALIAS_ALL in
1054 POINTER_TYPE, REFERENCE_TYPE
1055
1056 CASE_HIGH_SEEN in
1057 CASE_LABEL_EXPR
1058
1059 ENUM_IS_SCOPED in
1060 ENUMERAL_TYPE
1061
1062 TRANSACTION_EXPR_OUTER in
1063 TRANSACTION_EXPR
1064
1065 SSA_NAME_ANTI_RANGE_P in
1066 SSA_NAME
1067
1068 MUST_TAIL_CALL in
1069 CALL_EXPR
1070
1071 public_flag:
1072
1073 TREE_OVERFLOW in
1074 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
1075
1076 TREE_PUBLIC in
1077 VAR_DECL, FUNCTION_DECL
1078 IDENTIFIER_NODE
1079
1080 CONSTRUCTOR_NO_CLEARING in
1081 CONSTRUCTOR
1082
1083 ASM_VOLATILE_P in
1084 ASM_EXPR
1085
1086 CALL_EXPR_VA_ARG_PACK in
1087 CALL_EXPR
1088
1089 TYPE_CACHED_VALUES_P in
1090 all types
1091
1092 SAVE_EXPR_RESOLVED_P in
1093 SAVE_EXPR
1094
1095 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
1096 OMP_CLAUSE_LASTPRIVATE
1097
1098 OMP_CLAUSE_PRIVATE_DEBUG in
1099 OMP_CLAUSE_PRIVATE
1100
1101 OMP_CLAUSE_LINEAR_NO_COPYIN in
1102 OMP_CLAUSE_LINEAR
1103
1104 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in
1105 OMP_CLAUSE_MAP
1106
1107 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in
1108 OMP_CLAUSE_REDUCTION
1109
1110 TRANSACTION_EXPR_RELAXED in
1111 TRANSACTION_EXPR
1112
1113 FALLTHROUGH_LABEL_P in
1114 LABEL_DECL
1115
1116 SSA_NAME_IS_VIRTUAL_OPERAND in
1117 SSA_NAME
1118
1119 private_flag:
1120
1121 TREE_PRIVATE in
1122 all decls
1123
1124 CALL_EXPR_RETURN_SLOT_OPT in
1125 CALL_EXPR
1126
1127 OMP_SECTION_LAST in
1128 OMP_SECTION
1129
1130 OMP_PARALLEL_COMBINED in
1131 OMP_PARALLEL
1132
1133 OMP_ATOMIC_SEQ_CST in
1134 OMP_ATOMIC*
1135
1136 OMP_CLAUSE_PRIVATE_OUTER_REF in
1137 OMP_CLAUSE_PRIVATE
1138
1139 OMP_CLAUSE_LINEAR_NO_COPYOUT in
1140 OMP_CLAUSE_LINEAR
1141
1142 TYPE_REF_IS_RVALUE in
1143 REFERENCE_TYPE
1144
1145 ENUM_IS_OPAQUE in
1146 ENUMERAL_TYPE
1147
1148 protected_flag:
1149
1150 TREE_PROTECTED in
1151 BLOCK
1152 all decls
1153
1154 CALL_FROM_THUNK_P and
1155 CALL_ALLOCA_FOR_VAR_P in
1156 CALL_EXPR
1157
1158 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
1159 OMP_CLAUSE_LINEAR
1160
1161 side_effects_flag:
1162
1163 TREE_SIDE_EFFECTS in
1164 all expressions
1165 all decls
1166 all constants
1167
1168 FORCED_LABEL in
1169 LABEL_DECL
1170
1171 volatile_flag:
1172
1173 TREE_THIS_VOLATILE in
1174 all expressions
1175 all decls
1176
1177 TYPE_VOLATILE in
1178 all types
1179
1180 readonly_flag:
1181
1182 TREE_READONLY in
1183 all expressions
1184 all decls
1185
1186 TYPE_READONLY in
1187 all types
1188
1189 constant_flag:
1190
1191 TREE_CONSTANT in
1192 all expressions
1193 all decls
1194 all constants
1195
1196 TYPE_SIZES_GIMPLIFIED in
1197 all types
1198
1199 unsigned_flag:
1200
1201 TYPE_UNSIGNED in
1202 all types
1203
1204 DECL_UNSIGNED in
1205 all decls
1206
1207 asm_written_flag:
1208
1209 TREE_ASM_WRITTEN in
1210 VAR_DECL, FUNCTION_DECL, TYPE_DECL
1211 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
1212 BLOCK, STRING_CST
1213
1214 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in
1215 SSA_NAME
1216
1217 used_flag:
1218
1219 TREE_USED in
1220 all expressions
1221 all decls
1222 IDENTIFIER_NODE
1223
1224 nothrow_flag:
1225
1226 TREE_NOTHROW in
1227 CALL_EXPR
1228 FUNCTION_DECL
1229
1230 TREE_THIS_NOTRAP in
1231 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF
1232
1233 SSA_NAME_IN_FREE_LIST in
1234 SSA_NAME
1235
1236 DECL_NONALIASED in
1237 VAR_DECL
1238
1239 deprecated_flag:
1240
1241 TREE_DEPRECATED in
1242 all decls
1243 all types
1244
1245 IDENTIFIER_TRANSPARENT_ALIAS in
1246 IDENTIFIER_NODE
1247
1248 visited:
1249
1250 TREE_VISITED in
1251 all trees (used liberally by many passes)
1252
1253 saturating_flag:
1254
1255 TYPE_REVERSE_STORAGE_ORDER in
1256 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE
1257
1258 TYPE_SATURATING in
1259 other types
1260
1261 VAR_DECL_IS_VIRTUAL_OPERAND in
1262 VAR_DECL
1263
1264 nowarning_flag:
1265
1266 TREE_NO_WARNING in
1267 all expressions
1268 all decls
1269
1270 TYPE_ARTIFICIAL in
1271 all types
1272
1273 default_def_flag:
1274
1275 TYPE_FINAL_P in
1276 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE
1277
1278 TYPE_VECTOR_OPAQUE in
1279 VECTOR_TYPE
1280
1281 SSA_NAME_IS_DEFAULT_DEF in
1282 SSA_NAME
1283
1284 DECL_NONLOCAL_FRAME in
1285 VAR_DECL
1286
1287 REF_REVERSE_STORAGE_ORDER in
1288 BIT_FIELD_REF, MEM_REF
1289
1290 FUNC_ADDR_BY_DESCRIPTOR in
1291 ADDR_EXPR
1292
1293 CALL_EXPR_BY_DESCRIPTOR in
1294 CALL_EXPR
1295*/
1296
1297struct GTY(()) tree_typed {
1298 struct tree_base base;
1299 tree type;
1300};
1301
1302struct GTY(()) tree_common {
1303 struct tree_typed typed;
1304 tree chain;
1305};
1306
1307struct GTY(()) tree_int_cst {
1308 struct tree_typed typed;
1309 HOST_WIDE_INT val[1];
1310};
1311
1312
1313struct GTY(()) tree_real_cst {
1314 struct tree_typed typed;
1315 struct real_value * real_cst_ptr;
1316};
1317
1318struct GTY(()) tree_fixed_cst {
1319 struct tree_typed typed;
1320 struct fixed_value * fixed_cst_ptr;
1321};
1322
1323struct GTY(()) tree_string {
1324 struct tree_typed typed;
1325 int length;
1326 char str[1];
1327};
1328
1329struct GTY(()) tree_complex {
1330 struct tree_typed typed;
1331 tree real;
1332 tree imag;
1333};
1334
1335struct GTY(()) tree_vector {
1336 struct tree_typed typed;
1337 tree GTY ((length ("vector_cst_encoded_nelts ((tree) &%h)"))) elts[1];
1338};
1339
1340struct GTY(()) tree_identifier {
1341 struct tree_common common;
1342 struct ht_identifier id;
1343};
1344
1345struct GTY(()) tree_list {
1346 struct tree_common common;
1347 tree purpose;
1348 tree value;
1349};
1350
1351struct GTY(()) tree_vec {
1352 struct tree_common common;
1353 tree GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a[1];
1354};
1355
1356/* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
1357 element. INDEX can optionally design the position of VALUE: in arrays,
1358 it is the index where VALUE has to be placed; in structures, it is the
1359 FIELD_DECL of the member. */
1360struct GTY(()) constructor_elt {
1361 tree index;
1362 tree value;
1363};
1364
1365struct GTY(()) tree_constructor {
1366 struct tree_typed typed;
1367 vec<constructor_elt, va_gc> *elts;
1368};
1369
1370enum omp_clause_depend_kind
1371{
1372 OMP_CLAUSE_DEPEND_IN,
1373 OMP_CLAUSE_DEPEND_OUT,
1374 OMP_CLAUSE_DEPEND_INOUT,
1375 OMP_CLAUSE_DEPEND_SOURCE,
1376 OMP_CLAUSE_DEPEND_SINK,
1377 OMP_CLAUSE_DEPEND_LAST
1378};
1379
1380enum omp_clause_proc_bind_kind
1381{
1382 /* Numbers should match omp_proc_bind_t enum in omp.h. */
1383 OMP_CLAUSE_PROC_BIND_FALSE = 0,
1384 OMP_CLAUSE_PROC_BIND_TRUE = 1,
1385 OMP_CLAUSE_PROC_BIND_MASTER = 2,
1386 OMP_CLAUSE_PROC_BIND_CLOSE = 3,
1387 OMP_CLAUSE_PROC_BIND_SPREAD = 4,
1388 OMP_CLAUSE_PROC_BIND_LAST
1389};
1390
1391enum omp_clause_linear_kind
1392{
1393 OMP_CLAUSE_LINEAR_DEFAULT,
1394 OMP_CLAUSE_LINEAR_REF,
1395 OMP_CLAUSE_LINEAR_VAL,
1396 OMP_CLAUSE_LINEAR_UVAL
1397};
1398
1399struct GTY(()) tree_exp {
1400 struct tree_typed typed;
1401 location_t locus;
1402 tree GTY ((special ("tree_exp"),
1403 desc ("TREE_CODE ((tree) &%0)")))
1404 operands[1];
1405};
1406
1407/* Immediate use linking structure. This structure is used for maintaining
1408 a doubly linked list of uses of an SSA_NAME. */
1409struct GTY(()) ssa_use_operand_t {
1410 struct ssa_use_operand_t* GTY((skip(""))) prev;
1411 struct ssa_use_operand_t* GTY((skip(""))) next;
1412 /* Immediate uses for a given SSA name are maintained as a cyclic
1413 list. To recognize the root of this list, the location field
1414 needs to point to the original SSA name. Since statements and
1415 SSA names are of different data types, we need this union. See
1416 the explanation in struct imm_use_iterator. */
1417 union { gimple *stmt; tree ssa_name; } GTY((skip(""))) loc;
1418 tree *GTY((skip(""))) use;
1419};
1420
1421struct GTY(()) tree_ssa_name {
1422 struct tree_typed typed;
1423
1424 /* _DECL wrapped by this SSA name. */
1425 tree var;
1426
1427 /* Statement that defines this SSA name. */
1428 gimple *def_stmt;
1429
1430 /* Value range information. */
1431 union ssa_name_info_type {
1432 /* Pointer attributes used for alias analysis. */
1433 struct GTY ((tag ("0"))) ptr_info_def *ptr_info;
1434 /* Value range attributes used for zero/sign extension elimination. */
1435 struct GTY ((tag ("1"))) range_info_def *range_info;
1436 } GTY ((desc ("%1.typed.type ?" \
1437 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info;
1438
1439 /* Immediate uses list for this SSA_NAME. */
1440 struct ssa_use_operand_t imm_uses;
1441};
1442
1443struct GTY(()) phi_arg_d {
1444 /* imm_use MUST be the first element in struct because we do some
1445 pointer arithmetic with it. See phi_arg_index_from_use. */
1446 struct ssa_use_operand_t imm_use;
1447 tree def;
1448 location_t locus;
1449};
1450
1451struct GTY(()) tree_omp_clause {
1452 struct tree_common common;
1453 location_t locus;
1454 enum omp_clause_code code;
1455 union omp_clause_subcode {
1456 enum omp_clause_default_kind default_kind;
1457 enum omp_clause_schedule_kind schedule_kind;
1458 enum omp_clause_depend_kind depend_kind;
1459 /* See include/gomp-constants.h for enum gomp_map_kind's values. */
1460 unsigned int map_kind;
1461 enum omp_clause_proc_bind_kind proc_bind_kind;
1462 enum tree_code reduction_code;
1463 enum omp_clause_linear_kind linear_kind;
1464 enum tree_code if_modifier;
1465 /* The dimension a OMP_CLAUSE__GRIDDIM_ clause of a gridified target
1466 construct describes. */
1467 unsigned int dimension;
1468 } GTY ((skip)) subcode;
1469
1470 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's
1471 usage. */
1472 gimple_seq gimple_reduction_init;
1473 gimple_seq gimple_reduction_merge;
1474
1475 tree GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]")))
1476 ops[1];
1477};
1478
1479struct GTY(()) tree_block {
1480 struct tree_base base;
1481 tree chain;
1482
1483 unsigned abstract_flag : 1;
1484 unsigned block_num : 31;
1485
1486 location_t locus;
1487 location_t end_locus;
1488
1489 tree vars;
1490 vec<tree, va_gc> *nonlocalized_vars;
1491
1492 tree subblocks;
1493 tree supercontext;
1494 tree abstract_origin;
1495 tree fragment_origin;
1496 tree fragment_chain;
1497
1498 /* Pointer to the DWARF lexical block. */
1499 struct die_struct *die;
1500};
1501
1502struct GTY(()) tree_type_common {
1503 struct tree_common common;
1504 tree size;
1505 tree size_unit;
1506 tree attributes;
1507 unsigned int uid;
1508
1509 unsigned int precision : 10;
1510 unsigned no_force_blk_flag : 1;
1511 unsigned needs_constructing_flag : 1;
1512 unsigned transparent_aggr_flag : 1;
1513 unsigned restrict_flag : 1;
1514 unsigned contains_placeholder_bits : 2;
1515
1516 ENUM_BITFIELD(machine_mode) mode : 8;
1517
1518 unsigned string_flag : 1;
1519 unsigned lang_flag_0 : 1;
1520 unsigned lang_flag_1 : 1;
1521 unsigned lang_flag_2 : 1;
1522 unsigned lang_flag_3 : 1;
1523 unsigned lang_flag_4 : 1;
1524 unsigned lang_flag_5 : 1;
1525 unsigned lang_flag_6 : 1;
1526 unsigned lang_flag_7 : 1;
1527
1528 /* TYPE_ALIGN in log2; this has to be large enough to hold values
1529 of the maximum of BIGGEST_ALIGNMENT and MAX_OFILE_ALIGNMENT,
1530 the latter being usually the larger. For ELF it is 8<<28,
1531 so we need to store the value 32 (not 31, as we need the zero
1532 as well), hence six bits. */
1533 unsigned align : 6;
1534 unsigned warn_if_not_align : 6;
1535 unsigned typeless_storage : 1;
1536 unsigned empty_flag : 1;
1537 unsigned spare : 17;
1538
1539 alias_set_type alias_set;
1540 tree pointer_to;
1541 tree reference_to;
1542 union tree_type_symtab {
1543 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address;
1544 struct die_struct * GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die;
1545 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab;
1546 tree canonical;
1547 tree next_variant;
1548 tree main_variant;
1549 tree context;
1550 tree name;
1551};
1552
1553struct GTY(()) tree_type_with_lang_specific {
1554 struct tree_type_common common;
1555 /* Points to a structure whose details depend on the language in use. */
1556 struct lang_type *lang_specific;
1557};
1558
1559struct GTY(()) tree_type_non_common {
1560 struct tree_type_with_lang_specific with_lang_specific;
1561 tree values;
1562 tree minval;
1563 tree maxval;
1564 tree lang_1;
1565};
1566
1567struct GTY (()) tree_binfo {
1568 struct tree_common common;
1569
1570 tree offset;
1571 tree vtable;
1572 tree virtuals;
1573 tree vptr_field;
1574 vec<tree, va_gc> *base_accesses;
1575 tree inheritance;
1576
1577 tree vtt_subvtt;
1578 tree vtt_vptr;
1579
1580 vec<tree, va_gc> base_binfos;
1581};
1582
1583struct GTY(()) tree_decl_minimal {
1584 struct tree_common common;
1585 location_t locus;
1586 unsigned int uid;
1587 tree name;
1588 tree context;
1589};
1590
1591struct GTY(()) tree_decl_common {
1592 struct tree_decl_minimal common;
1593 tree size;
1594
1595 ENUM_BITFIELD(machine_mode) mode : 8;
1596
1597 unsigned nonlocal_flag : 1;
1598 unsigned virtual_flag : 1;
1599 unsigned ignored_flag : 1;
1600 unsigned abstract_flag : 1;
1601 unsigned artificial_flag : 1;
1602 unsigned preserve_flag: 1;
1603 unsigned debug_expr_is_from : 1;
1604
1605 unsigned lang_flag_0 : 1;
1606 unsigned lang_flag_1 : 1;
1607 unsigned lang_flag_2 : 1;
1608 unsigned lang_flag_3 : 1;
1609 unsigned lang_flag_4 : 1;
1610 unsigned lang_flag_5 : 1;
1611 unsigned lang_flag_6 : 1;
1612 unsigned lang_flag_7 : 1;
1613 unsigned lang_flag_8 : 1;
1614
1615 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER
1616 IN TRANSLATION_UNIT_DECL, this is TRANSLATION_UNIT_WARN_EMPTY_P. */
1617 unsigned decl_flag_0 : 1;
1618 /* In FIELD_DECL, this is DECL_BIT_FIELD
1619 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1620 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */
1621 unsigned decl_flag_1 : 1;
1622 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1623 In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1624 DECL_HAS_VALUE_EXPR_P. */
1625 unsigned decl_flag_2 : 1;
1626 /* In FIELD_DECL, this is DECL_PADDING_P. */
1627 unsigned decl_flag_3 : 1;
1628 /* Logically, these two would go in a theoretical base shared by var and
1629 parm decl. */
1630 unsigned gimple_reg_flag : 1;
1631 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */
1632 unsigned decl_by_reference_flag : 1;
1633 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */
1634 unsigned decl_read_flag : 1;
1635 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */
1636 unsigned decl_nonshareable_flag : 1;
1637
1638 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */
1639 unsigned int off_align : 6;
1640
1641 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */
1642 unsigned int align : 6;
1643
1644 /* DECL_WARN_IF_NOT_ALIGN. It should have the same size as
1645 TYPE_WARN_IF_NOT_ALIGN. */
1646 unsigned int warn_if_not_align : 6;
1647
1648 /* 14 bits unused. */
1649
1650 /* UID for points-to sets, stable over copying from inlining. */
1651 unsigned int pt_uid;
1652
1653 tree size_unit;
1654 tree initial;
1655 tree attributes;
1656 tree abstract_origin;
1657
1658 /* Points to a structure whose details depend on the language in use. */
1659 struct lang_decl *lang_specific;
1660};
1661
1662struct GTY(()) tree_decl_with_rtl {
1663 struct tree_decl_common common;
1664 rtx rtl;
1665};
1666
1667struct GTY(()) tree_field_decl {
1668 struct tree_decl_common common;
1669
1670 tree offset;
1671 tree bit_field_type;
1672 tree qualifier;
1673 tree bit_offset;
1674 tree fcontext;
1675};
1676
1677struct GTY(()) tree_label_decl {
1678 struct tree_decl_with_rtl common;
1679 int label_decl_uid;
1680 int eh_landing_pad_nr;
1681};
1682
1683struct GTY(()) tree_result_decl {
1684 struct tree_decl_with_rtl common;
1685};
1686
1687struct GTY(()) tree_const_decl {
1688 struct tree_decl_common common;
1689};
1690
1691struct GTY(()) tree_parm_decl {
1692 struct tree_decl_with_rtl common;
1693 rtx incoming_rtl;
1694};
1695
1696struct GTY(()) tree_decl_with_vis {
1697 struct tree_decl_with_rtl common;
1698 tree assembler_name;
1699 struct symtab_node *symtab_node;
1700
1701 /* Belong to VAR_DECL exclusively. */
1702 unsigned defer_output : 1;
1703 unsigned hard_register : 1;
1704 unsigned common_flag : 1;
1705 unsigned in_text_section : 1;
1706 unsigned in_constant_pool : 1;
1707 unsigned dllimport_flag : 1;
1708 /* Don't belong to VAR_DECL exclusively. */
1709 unsigned weak_flag : 1;
1710
1711 unsigned seen_in_bind_expr : 1;
1712 unsigned comdat_flag : 1;
1713 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */
1714 ENUM_BITFIELD(symbol_visibility) visibility : 2;
1715 unsigned visibility_specified : 1;
1716
1717 /* Belong to FUNCTION_DECL exclusively. */
1718 unsigned init_priority_p : 1;
1719 /* Used by C++ only. Might become a generic decl flag. */
1720 unsigned shadowed_for_var_p : 1;
1721 /* Belong to FUNCTION_DECL exclusively. */
1722 unsigned cxx_constructor : 1;
1723 /* Belong to FUNCTION_DECL exclusively. */
1724 unsigned cxx_destructor : 1;
1725 /* Belong to FUNCTION_DECL exclusively. */
1726 unsigned final : 1;
1727 /* Belong to FUNCTION_DECL exclusively. */
1728 unsigned regdecl_flag : 1;
1729 /* 14 unused bits. */
1730};
1731
1732struct GTY(()) tree_var_decl {
1733 struct tree_decl_with_vis common;
1734};
1735
1736struct GTY(()) tree_decl_non_common {
1737 struct tree_decl_with_vis common;
1738 /* Almost all FE's use this. */
1739 tree result;
1740};
1741
1742/* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1743 arguments/result/saved_tree fields by front ends. It was either inherit
1744 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1745 which seemed a bit strange. */
1746
1747struct GTY(()) tree_function_decl {
1748 struct tree_decl_non_common common;
1749
1750 struct function *f;
1751
1752 /* Arguments of the function. */
1753 tree arguments;
1754 /* The personality function. Used for stack unwinding. */
1755 tree personality;
1756
1757 /* Function specific options that are used by this function. */
1758 tree function_specific_target; /* target options */
1759 tree function_specific_optimization; /* optimization options */
1760
1761 /* Generic function body. */
1762 tree saved_tree;
1763 /* Index within a virtual table. */
1764 tree vindex;
1765
1766 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1767 DECL_FUNCTION_CODE. Otherwise unused.
1768 ??? The bitfield needs to be able to hold all target function
1769 codes as well. */
1770 ENUM_BITFIELD(built_in_function) function_code : 12;
1771 ENUM_BITFIELD(built_in_class) built_in_class : 2;
1772
1773 unsigned static_ctor_flag : 1;
1774 unsigned static_dtor_flag : 1;
1775
1776 unsigned uninlinable : 1;
1777 unsigned possibly_inlined : 1;
1778 unsigned novops_flag : 1;
1779 unsigned returns_twice_flag : 1;
1780 unsigned malloc_flag : 1;
1781 unsigned operator_new_flag : 1;
1782 unsigned declared_inline_flag : 1;
1783 unsigned no_inline_warning_flag : 1;
1784
1785 unsigned no_instrument_function_entry_exit : 1;
1786 unsigned no_limit_stack : 1;
1787 unsigned disregard_inline_limits : 1;
1788 unsigned pure_flag : 1;
1789 unsigned looping_const_or_pure_flag : 1;
1790 unsigned has_debug_args_flag : 1;
1791 unsigned tm_clone_flag : 1;
1792 unsigned versioned_function : 1;
1793 /* No bits left. */
1794};
1795
1796struct GTY(()) tree_translation_unit_decl {
1797 struct tree_decl_common common;
1798 /* Source language of this translation unit. Used for DWARF output. */
1799 const char * GTY((skip(""))) language;
1800 /* TODO: Non-optimization used to build this translation unit. */
1801 /* TODO: Root of a partial DWARF tree for global types and decls. */
1802};
1803
1804struct GTY(()) tree_type_decl {
1805 struct tree_decl_non_common common;
1806
1807};
1808
1809struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1810 {
1811 struct tree_statement_list_node *prev;
1812 struct tree_statement_list_node *next;
1813 tree stmt;
1814};
1815
1816struct GTY(()) tree_statement_list
1817 {
1818 struct tree_typed typed;
1819 struct tree_statement_list_node *head;
1820 struct tree_statement_list_node *tail;
1821};
1822
1823
1824/* Optimization options used by a function. */
1825
1826struct GTY(()) tree_optimization_option {
1827 struct tree_base base;
1828
1829 /* The optimization options used by the user. */
1830 struct cl_optimization *opts;
1831
1832 /* Target optabs for this set of optimization options. This is of
1833 type `struct target_optabs *'. */
1834 void *GTY ((atomic)) optabs;
1835
1836 /* The value of this_target_optabs against which the optabs above were
1837 generated. */
1838 struct target_optabs *GTY ((skip)) base_optabs;
1839};
1840
1841/* Forward declaration, defined in target-globals.h. */
1842
1843struct GTY(()) target_globals;
1844
1845/* Target options used by a function. */
1846
1847struct GTY(()) tree_target_option {
1848 struct tree_base base;
1849
1850 /* Target globals for the corresponding target option. */
1851 struct target_globals *globals;
1852
1853 /* The optimization options used by the user. */
1854 struct cl_target_option *opts;
1855};
1856
1857/* Define the overall contents of a tree node.
1858 It may be any of the structures declared above
1859 for various types of node. */
1860union GTY ((ptr_alias (union lang_tree_node),
1861 desc ("tree_node_structure (&%h)"), variable_size)) tree_node {
1862 struct tree_base GTY ((tag ("TS_BASE"))) base;
1863 struct tree_typed GTY ((tag ("TS_TYPED"))) typed;
1864 struct tree_common GTY ((tag ("TS_COMMON"))) common;
1865 struct tree_int_cst GTY ((tag ("TS_INT_CST"))) int_cst;
1866 struct tree_real_cst GTY ((tag ("TS_REAL_CST"))) real_cst;
1867 struct tree_fixed_cst GTY ((tag ("TS_FIXED_CST"))) fixed_cst;
1868 struct tree_vector GTY ((tag ("TS_VECTOR"))) vector;
1869 struct tree_string GTY ((tag ("TS_STRING"))) string;
1870 struct tree_complex GTY ((tag ("TS_COMPLEX"))) complex;
1871 struct tree_identifier GTY ((tag ("TS_IDENTIFIER"))) identifier;
1872 struct tree_decl_minimal GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal;
1873 struct tree_decl_common GTY ((tag ("TS_DECL_COMMON"))) decl_common;
1874 struct tree_decl_with_rtl GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl;
1875 struct tree_decl_non_common GTY ((tag ("TS_DECL_NON_COMMON")))
1876 decl_non_common;
1877 struct tree_parm_decl GTY ((tag ("TS_PARM_DECL"))) parm_decl;
1878 struct tree_decl_with_vis GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis;
1879 struct tree_var_decl GTY ((tag ("TS_VAR_DECL"))) var_decl;
1880 struct tree_field_decl GTY ((tag ("TS_FIELD_DECL"))) field_decl;
1881 struct tree_label_decl GTY ((tag ("TS_LABEL_DECL"))) label_decl;
1882 struct tree_result_decl GTY ((tag ("TS_RESULT_DECL"))) result_decl;
1883 struct tree_const_decl GTY ((tag ("TS_CONST_DECL"))) const_decl;
1884 struct tree_type_decl GTY ((tag ("TS_TYPE_DECL"))) type_decl;
1885 struct tree_function_decl GTY ((tag ("TS_FUNCTION_DECL"))) function_decl;
1886 struct tree_translation_unit_decl GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1887 translation_unit_decl;
1888 struct tree_type_common GTY ((tag ("TS_TYPE_COMMON"))) type_common;
1889 struct tree_type_with_lang_specific GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1890 type_with_lang_specific;
1891 struct tree_type_non_common GTY ((tag ("TS_TYPE_NON_COMMON")))
1892 type_non_common;
1893 struct tree_list GTY ((tag ("TS_LIST"))) list;
1894 struct tree_vec GTY ((tag ("TS_VEC"))) vec;
1895 struct tree_exp GTY ((tag ("TS_EXP"))) exp;
1896 struct tree_ssa_name GTY ((tag ("TS_SSA_NAME"))) ssa_name;
1897 struct tree_block GTY ((tag ("TS_BLOCK"))) block;
1898 struct tree_binfo GTY ((tag ("TS_BINFO"))) binfo;
1899 struct tree_statement_list GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list;
1900 struct tree_constructor GTY ((tag ("TS_CONSTRUCTOR"))) constructor;
1901 struct tree_omp_clause GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause;
1902 struct tree_optimization_option GTY ((tag ("TS_OPTIMIZATION"))) optimization;
1903 struct tree_target_option GTY ((tag ("TS_TARGET_OPTION"))) target_option;
1904};
1905
1906/* Structure describing an attribute and a function to handle it. */
1907struct attribute_spec {
1908 /* The name of the attribute (without any leading or trailing __),
1909 or NULL to mark the end of a table of attributes. */
1910 const char *name;
1911 /* The minimum length of the list of arguments of the attribute. */
1912 int min_length;
1913 /* The maximum length of the list of arguments of the attribute
1914 (-1 for no maximum). */
1915 int max_length;
1916 /* Whether this attribute requires a DECL. If it does, it will be passed
1917 from types of DECLs, function return types and array element types to
1918 the DECLs, function types and array types respectively; but when
1919 applied to a type in any other circumstances, it will be ignored with
1920 a warning. (If greater control is desired for a given attribute,
1921 this should be false, and the flags argument to the handler may be
1922 used to gain greater control in that case.) */
1923 bool decl_required;
1924 /* Whether this attribute requires a type. If it does, it will be passed
1925 from a DECL to the type of that DECL. */
1926 bool type_required;
1927 /* Whether this attribute requires a function (or method) type. If it does,
1928 it will be passed from a function pointer type to the target type,
1929 and from a function return type (which is not itself a function
1930 pointer type) to the function type. */
1931 bool function_type_required;
1932 /* Function to handle this attribute. NODE points to the node to which
1933 the attribute is to be applied. If a DECL, it should be modified in
1934 place; if a TYPE, a copy should be created. NAME is the name of the
1935 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST
1936 of the arguments (which may be NULL). FLAGS gives further information
1937 about the context of the attribute. Afterwards, the attributes will
1938 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1939 unless *NO_ADD_ATTRS is set to true (which should be done on error,
1940 as well as in any other cases when the attributes should not be added
1941 to the DECL or TYPE). Depending on FLAGS, any attributes to be
1942 applied to another type or DECL later may be returned;
1943 otherwise the return value should be NULL_TREE. This pointer may be
1944 NULL if no special handling is required beyond the checks implied
1945 by the rest of this structure. */
1946 tree (*handler) (tree *node, tree name, tree args,
1947 int flags, bool *no_add_attrs);
1948 /* Specifies if attribute affects type's identity. */
1949 bool affects_type_identity;
1950
1951 /* Specifies the name of an attribute that's mutually exclusive with
1952 this one, and whether the relationship applies to the function,
1953 variable, or type form of the attribute. */
1954 struct exclusions {
1955 const char *name;
1956 bool function;
1957 bool variable;
1958 bool type;
1959 };
1960
1961 /* An array of attribute exclusions describing names of other attributes
1962 that this attribute is mutually exclusive with. */
1963 const exclusions *exclude;
1964};
1965
1966/* These functions allow a front-end to perform a manual layout of a
1967 RECORD_TYPE. (For instance, if the placement of subsequent fields
1968 depends on the placement of fields so far.) Begin by calling
1969 start_record_layout. Then, call place_field for each of the
1970 fields. Then, call finish_record_layout. See layout_type for the
1971 default way in which these functions are used. */
1972typedef struct record_layout_info_s {
1973 /* The RECORD_TYPE that we are laying out. */
1974 tree t;
1975 /* The offset into the record so far, in bytes, not including bits in
1976 BITPOS. */
1977 tree offset;
1978 /* The last known alignment of SIZE. */
1979 unsigned int offset_align;
1980 /* The bit position within the last OFFSET_ALIGN bits, in bits. */
1981 tree bitpos;
1982 /* The alignment of the record so far, in bits. */
1983 unsigned int record_align;
1984 /* The alignment of the record so far, ignoring #pragma pack and
1985 __attribute__ ((packed)), in bits. */
1986 unsigned int unpacked_align;
1987 /* The previous field laid out. */
1988 tree prev_field;
1989 /* The static variables (i.e., class variables, as opposed to
1990 instance variables) encountered in T. */
1991 vec<tree, va_gc> *pending_statics;
1992 /* Bits remaining in the current alignment group */
1993 int remaining_in_alignment;
1994 /* True if we've seen a packed field that didn't have normal
1995 alignment anyway. */
1996 int packed_maybe_necessary;
1997} *record_layout_info;
1998
1999/* Iterator for going through the function arguments. */
2000struct function_args_iterator {
2001 tree next; /* TREE_LIST pointing to the next argument */
2002};
2003
2004/* Structures to map from a tree to another tree. */
2005struct GTY(()) tree_map_base {
2006 tree from;
2007};
2008
2009/* Map from a tree to another tree. */
2010
2011struct GTY((for_user)) tree_map {
2012 struct tree_map_base base;
2013 unsigned int hash;
2014 tree to;
2015};
2016
2017/* Map from a decl tree to another tree. */
2018struct GTY((for_user)) tree_decl_map {
2019 struct tree_map_base base;
2020 tree to;
2021};
2022
2023/* Map from a tree to an int. */
2024struct GTY((for_user)) tree_int_map {
2025 struct tree_map_base base;
2026 unsigned int to;
2027};
2028
2029/* Map from a decl tree to a tree vector. */
2030struct GTY((for_user)) tree_vec_map {
2031 struct tree_map_base base;
2032 vec<tree, va_gc> *to;
2033};
2034
2035/* Abstract iterators for CALL_EXPRs. These static inline definitions
2036 have to go towards the end of tree.h so that union tree_node is fully
2037 defined by this point. */
2038
2039/* Structure containing iterator state. */
2040struct call_expr_arg_iterator {
2041 tree t; /* the call_expr */
2042 int n; /* argument count */
2043 int i; /* next argument index */
2044};
2045
2046struct const_call_expr_arg_iterator {
2047 const_tree t; /* the call_expr */
2048 int n; /* argument count */
2049 int i; /* next argument index */
2050};
2051
2052/* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
2053 function, and flags. */
2054struct GTY(()) builtin_info_type {
2055 tree decl;
2056 /* Whether the user can use <xxx> instead of explicitly using calls
2057 to __builtin_<xxx>. */
2058 unsigned implicit_p : 1;
2059 /* Whether the user has provided a declaration of <xxx>. */
2060 unsigned declared_p : 1;
2061};
2062
2063/* Information about a _FloatN or _FloatNx type that may be
2064 supported. */
2065struct floatn_type_info {
2066 /* The number N in the type name. */
2067 int n;
2068 /* Whether it is an extended type _FloatNx (true) or an interchange
2069 type (false). */
2070 bool extended;
2071};
2072
2073
2074/*---------------------------------------------------------------------------
2075 Global variables
2076---------------------------------------------------------------------------*/
2077/* Matrix describing the structures contained in a given tree code. */
2078extern bool tree_contains_struct[MAX_TREE_CODES][64];
2079
2080/* Class of tree given its code. */
2081extern const enum tree_code_class tree_code_type[];
2082
2083/* Each tree code class has an associated string representation.
2084 These must correspond to the tree_code_class entries. */
2085extern const char *const tree_code_class_strings[];
2086
2087/* Number of argument-words in each kind of tree-node. */
2088extern const unsigned char tree_code_length[];
2089
2090/* Vector of all alias pairs for global symbols. */
2091extern GTY(()) vec<alias_pair, va_gc> *alias_pairs;
2092
2093/* Names of all the built_in classes. */
2094extern const char *const built_in_class_names[BUILT_IN_LAST];
2095
2096/* Names of all the built_in functions. */
2097extern const char * built_in_names[(int) END_BUILTINS];
2098
2099/* Number of operands and names for each OMP_CLAUSE node. */
2100extern unsigned const char omp_clause_num_ops[];
2101extern const char * const omp_clause_code_name[];
2102
2103/* A vector of all translation-units. */
2104extern GTY (()) vec<tree, va_gc> *all_translation_units;
2105
2106/* Vector of standard trees used by the C compiler. */
2107extern GTY(()) tree global_trees[TI_MAX];
2108
2109/* The standard C integer types. Use integer_type_kind to index into
2110 this array. */
2111extern GTY(()) tree integer_types[itk_none];
2112
2113/* Types used to represent sizes. */
2114extern GTY(()) tree sizetype_tab[(int) stk_type_kind_last];
2115
2116/* Arrays for keeping track of tree node statistics. */
2117extern int tree_node_counts[];
2118extern int tree_node_sizes[];
2119
2120/* True if we are in gimple form and the actions of the folders need to
2121 be restricted. False if we are not in gimple form and folding is not
2122 restricted to creating gimple expressions. */
2123extern bool in_gimple_form;
2124
2125/* Functional interface to the builtin functions. */
2126extern GTY(()) builtin_info_type builtin_info[(int)END_BUILTINS];
2127
2128/* If nonzero, an upper limit on alignment of structure fields, in bits, */
2129extern unsigned int maximum_field_alignment;
2130
2131/* Points to the FUNCTION_DECL of the function whose body we are reading. */
2132extern GTY(()) tree current_function_decl;
2133
2134/* Nonzero means a FUNC_BEGIN label was emitted. */
2135extern GTY(()) const char * current_function_func_begin_label;
2136
2137/* Information about the _FloatN and _FloatNx types. */
2138extern const floatn_type_info floatn_nx_types[NUM_FLOATN_NX_TYPES];
2139
2140#endif // GCC_TREE_CORE_H
2141