1 /* Core data structures for the 'tree' type. 2 Copyright (C) 1989-2017 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 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 ---------------------------------------------------------------------------*/ 32 struct function; 33 struct real_value; 34 struct fixed_value; 35 struct ptr_info_def; 36 struct range_info_def; 37 struct 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 /* Call argument flags. */ 97 /* Nonzero if the argument is not dereferenced recursively, thus only 98 directly reachable memory is read or written. */ 99 #define EAF_DIRECT (1 << 0) 100 101 /* Nonzero if memory reached by the argument is not clobbered. */ 102 #define EAF_NOCLOBBER (1 << 1) 103 104 /* Nonzero if the argument does not escape. */ 105 #define EAF_NOESCAPE (1 << 2) 106 107 /* Nonzero if the argument is not used by the function. */ 108 #define EAF_UNUSED (1 << 3) 109 110 /* Call return flags. */ 111 /* Mask for the argument number that is returned. Lower two bits of 112 the return flags, encodes argument slots zero to three. */ 113 #define ERF_RETURN_ARG_MASK (3) 114 115 /* Nonzero if the return value is equal to the argument number 116 flags & ERF_RETURN_ARG_MASK. */ 117 #define ERF_RETURNS_ARG (1 << 2) 118 119 /* Nonzero if the return value does not alias with anything. Functions 120 with the malloc attribute have this set on their return value. */ 121 #define ERF_NOALIAS (1 << 3) 122 123 124 /*--------------------------------------------------------------------------- 125 Enumerations 126 ---------------------------------------------------------------------------*/ 127 /* Codes of tree nodes. */ 128 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM, 129 #define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE, 130 131 enum tree_code { 132 #include "all-tree.def" 133 MAX_TREE_CODES 134 }; 135 136 #undef DEFTREECODE 137 #undef END_OF_BASE_TREE_CODES 138 139 /* Number of language-independent tree codes. */ 140 #define NUM_TREE_CODES \ 141 ((int) LAST_AND_UNUSED_TREE_CODE) 142 143 #define CODE_CONTAINS_STRUCT(CODE, STRUCT) \ 144 (tree_contains_struct[(CODE)][(STRUCT)]) 145 146 147 /* Classify which part of the compiler has defined a given builtin function. 148 Note that we assume below that this is no more than two bits. */ 149 enum built_in_class { 150 NOT_BUILT_IN = 0, 151 BUILT_IN_FRONTEND, 152 BUILT_IN_MD, 153 BUILT_IN_NORMAL 154 }; 155 156 /* Last marker used for LTO stremaing of built_in_class. We can not add it 157 to the enum since we need the enumb to fit in 2 bits. */ 158 #define BUILT_IN_LAST (BUILT_IN_NORMAL + 1) 159 160 /* Codes that identify the various built in functions 161 so that expand_call can identify them quickly. */ 162 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM, 163 enum built_in_function { 164 #include "builtins.def" 165 166 BEGIN_CHKP_BUILTINS, 167 168 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) 169 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \ 170 ENUM##_CHKP = ENUM + BEGIN_CHKP_BUILTINS + 1, 171 #include "builtins.def" 172 173 END_CHKP_BUILTINS = BEGIN_CHKP_BUILTINS * 2 + 1, 174 175 /* Complex division routines in libgcc. These are done via builtins 176 because emit_library_call_value can't handle complex values. */ 177 BUILT_IN_COMPLEX_MUL_MIN, 178 BUILT_IN_COMPLEX_MUL_MAX 179 = BUILT_IN_COMPLEX_MUL_MIN 180 + MAX_MODE_COMPLEX_FLOAT 181 - MIN_MODE_COMPLEX_FLOAT, 182 183 BUILT_IN_COMPLEX_DIV_MIN, 184 BUILT_IN_COMPLEX_DIV_MAX 185 = BUILT_IN_COMPLEX_DIV_MIN 186 + MAX_MODE_COMPLEX_FLOAT 187 - MIN_MODE_COMPLEX_FLOAT, 188 189 /* Upper bound on non-language-specific builtins. */ 190 END_BUILTINS 191 }; 192 193 /* Internal functions. */ 194 enum internal_fn { 195 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE, 196 #include "internal-fn.def" 197 IFN_LAST 198 }; 199 200 /* An enum that combines target-independent built-in functions with 201 internal functions, so that they can be treated in a similar way. 202 The numbers for built-in functions are the same as for the 203 built_in_function enum. The numbers for internal functions 204 start at END_BUITLINS. */ 205 enum combined_fn { 206 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \ 207 CFN_##ENUM = int (ENUM), 208 #include "builtins.def" 209 210 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) 211 #define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \ 212 CFN_##ENUM##_CHKP = int (ENUM##_CHKP), 213 #include "builtins.def" 214 215 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) \ 216 CFN_##CODE = int (END_BUILTINS) + int (IFN_##CODE), 217 #include "internal-fn.def" 218 219 CFN_LAST 220 }; 221 222 /* Tree code classes. Each tree_code has an associated code class 223 represented by a TREE_CODE_CLASS. */ 224 enum tree_code_class { 225 tcc_exceptional, /* An exceptional code (fits no category). */ 226 tcc_constant, /* A constant. */ 227 /* Order of tcc_type and tcc_declaration is important. */ 228 tcc_type, /* A type object code. */ 229 tcc_declaration, /* A declaration (also serving as variable refs). */ 230 tcc_reference, /* A reference to storage. */ 231 tcc_comparison, /* A comparison expression. */ 232 tcc_unary, /* A unary arithmetic expression. */ 233 tcc_binary, /* A binary arithmetic expression. */ 234 tcc_statement, /* A statement expression, which have side effects 235 but usually no interesting value. */ 236 tcc_vl_exp, /* A function call or other expression with a 237 variable-length operand vector. */ 238 tcc_expression /* Any other expression. */ 239 }; 240 241 /* OMP_CLAUSE codes. Do not reorder, as this is used to index into 242 the tables omp_clause_num_ops and omp_clause_code_name. */ 243 enum omp_clause_code { 244 /* Clause zero is special-cased inside the parser 245 (c_parser_omp_variable_list). */ 246 OMP_CLAUSE_ERROR = 0, 247 248 /* OpenACC/OpenMP clause: private (variable_list). */ 249 OMP_CLAUSE_PRIVATE, 250 251 /* OpenMP clause: shared (variable_list). */ 252 OMP_CLAUSE_SHARED, 253 254 /* OpenACC/OpenMP clause: firstprivate (variable_list). */ 255 OMP_CLAUSE_FIRSTPRIVATE, 256 257 /* OpenMP clause: lastprivate (variable_list). */ 258 OMP_CLAUSE_LASTPRIVATE, 259 260 /* OpenACC/OpenMP clause: reduction (operator:variable_list). 261 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator. 262 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var. 263 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var 264 into the shared one. 265 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL 266 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}. 267 Operand 4: OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER: Another dummy 268 VAR_DECL placeholder, used like the above for C/C++ array 269 reductions. */ 270 OMP_CLAUSE_REDUCTION, 271 272 /* OpenMP clause: copyin (variable_list). */ 273 OMP_CLAUSE_COPYIN, 274 275 /* OpenMP clause: copyprivate (variable_list). */ 276 OMP_CLAUSE_COPYPRIVATE, 277 278 /* OpenMP clause: linear (variable-list[:linear-step]). */ 279 OMP_CLAUSE_LINEAR, 280 281 /* OpenMP clause: aligned (variable-list[:alignment]). */ 282 OMP_CLAUSE_ALIGNED, 283 284 /* OpenMP clause: depend ({in,out,inout}:variable-list). */ 285 OMP_CLAUSE_DEPEND, 286 287 /* OpenMP clause: uniform (argument-list). */ 288 OMP_CLAUSE_UNIFORM, 289 290 /* OpenMP clause: to (extended-list). 291 Only when it appears in declare target. */ 292 OMP_CLAUSE_TO_DECLARE, 293 294 /* OpenMP clause: link (variable-list). */ 295 OMP_CLAUSE_LINK, 296 297 /* OpenMP clause: from (variable-list). */ 298 OMP_CLAUSE_FROM, 299 300 /* OpenMP clause: to (variable-list). */ 301 OMP_CLAUSE_TO, 302 303 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr, 304 device, host (self), present, present_or_copy (pcopy), present_or_copyin 305 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)} 306 (variable-list). 307 308 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */ 309 OMP_CLAUSE_MAP, 310 311 /* OpenACC clause: use_device (variable_list). 312 OpenMP clause: use_device_ptr (variable-list). */ 313 OMP_CLAUSE_USE_DEVICE_PTR, 314 315 /* OpenMP clause: is_device_ptr (variable-list). */ 316 OMP_CLAUSE_IS_DEVICE_PTR, 317 318 /* Internal structure to hold OpenACC cache directive's variable-list. 319 #pragma acc cache (variable-list). */ 320 OMP_CLAUSE__CACHE_, 321 322 /* OpenACC clause: gang [(gang-argument-list)]. 323 Where 324 gang-argument-list: [gang-argument-list, ] gang-argument 325 gang-argument: [num:] integer-expression 326 | static: size-expression 327 size-expression: * | integer-expression. */ 328 OMP_CLAUSE_GANG, 329 330 /* OpenACC clause: async [(integer-expression)]. */ 331 OMP_CLAUSE_ASYNC, 332 333 /* OpenACC clause: wait [(integer-expression-list)]. */ 334 OMP_CLAUSE_WAIT, 335 336 /* OpenACC clause: auto. */ 337 OMP_CLAUSE_AUTO, 338 339 /* OpenACC clause: seq. */ 340 OMP_CLAUSE_SEQ, 341 342 /* Internal clause: temporary for combined loops expansion. */ 343 OMP_CLAUSE__LOOPTEMP_, 344 345 /* OpenACC/OpenMP clause: if (scalar-expression). */ 346 OMP_CLAUSE_IF, 347 348 /* OpenMP clause: num_threads (integer-expression). */ 349 OMP_CLAUSE_NUM_THREADS, 350 351 /* OpenMP clause: schedule. */ 352 OMP_CLAUSE_SCHEDULE, 353 354 /* OpenMP clause: nowait. */ 355 OMP_CLAUSE_NOWAIT, 356 357 /* OpenMP clause: ordered [(constant-integer-expression)]. */ 358 OMP_CLAUSE_ORDERED, 359 360 /* OpenMP clause: default. */ 361 OMP_CLAUSE_DEFAULT, 362 363 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */ 364 OMP_CLAUSE_COLLAPSE, 365 366 /* OpenMP clause: untied. */ 367 OMP_CLAUSE_UNTIED, 368 369 /* OpenMP clause: final (scalar-expression). */ 370 OMP_CLAUSE_FINAL, 371 372 /* OpenMP clause: mergeable. */ 373 OMP_CLAUSE_MERGEABLE, 374 375 /* OpenMP clause: device (integer-expression). */ 376 OMP_CLAUSE_DEVICE, 377 378 /* OpenMP clause: dist_schedule (static[:chunk-size]). */ 379 OMP_CLAUSE_DIST_SCHEDULE, 380 381 /* OpenMP clause: inbranch. */ 382 OMP_CLAUSE_INBRANCH, 383 384 /* OpenMP clause: notinbranch. */ 385 OMP_CLAUSE_NOTINBRANCH, 386 387 /* OpenMP clause: num_teams(integer-expression). */ 388 OMP_CLAUSE_NUM_TEAMS, 389 390 /* OpenMP clause: thread_limit(integer-expression). */ 391 OMP_CLAUSE_THREAD_LIMIT, 392 393 /* OpenMP clause: proc_bind ({master,close,spread}). */ 394 OMP_CLAUSE_PROC_BIND, 395 396 /* OpenMP clause: safelen (constant-integer-expression). */ 397 OMP_CLAUSE_SAFELEN, 398 399 /* OpenMP clause: simdlen (constant-integer-expression). */ 400 OMP_CLAUSE_SIMDLEN, 401 402 /* OpenMP clause: for. */ 403 OMP_CLAUSE_FOR, 404 405 /* OpenMP clause: parallel. */ 406 OMP_CLAUSE_PARALLEL, 407 408 /* OpenMP clause: sections. */ 409 OMP_CLAUSE_SECTIONS, 410 411 /* OpenMP clause: taskgroup. */ 412 OMP_CLAUSE_TASKGROUP, 413 414 /* OpenMP clause: priority (integer-expression). */ 415 OMP_CLAUSE_PRIORITY, 416 417 /* OpenMP clause: grainsize (integer-expression). */ 418 OMP_CLAUSE_GRAINSIZE, 419 420 /* OpenMP clause: num_tasks (integer-expression). */ 421 OMP_CLAUSE_NUM_TASKS, 422 423 /* OpenMP clause: nogroup. */ 424 OMP_CLAUSE_NOGROUP, 425 426 /* OpenMP clause: threads. */ 427 OMP_CLAUSE_THREADS, 428 429 /* OpenMP clause: simd. */ 430 OMP_CLAUSE_SIMD, 431 432 /* OpenMP clause: hint (integer-expression). */ 433 OMP_CLAUSE_HINT, 434 435 /* OpenMP clause: defaultmap (tofrom: scalar). */ 436 OMP_CLAUSE_DEFAULTMAP, 437 438 /* Internally used only clause, holding SIMD uid. */ 439 OMP_CLAUSE__SIMDUID_, 440 441 /* Internally used only clause, flag whether this is SIMT simd 442 loop or not. */ 443 OMP_CLAUSE__SIMT_, 444 445 /* Internally used only clause, holding _Cilk_for # of iterations 446 on OMP_PARALLEL. */ 447 OMP_CLAUSE__CILK_FOR_COUNT_, 448 449 /* OpenACC clause: independent. */ 450 OMP_CLAUSE_INDEPENDENT, 451 452 /* OpenACC clause: worker [( [num:] integer-expression)]. */ 453 OMP_CLAUSE_WORKER, 454 455 /* OpenACC clause: vector [( [length:] integer-expression)]. */ 456 OMP_CLAUSE_VECTOR, 457 458 /* OpenACC clause: num_gangs (integer-expression). */ 459 OMP_CLAUSE_NUM_GANGS, 460 461 /* OpenACC clause: num_workers (integer-expression). */ 462 OMP_CLAUSE_NUM_WORKERS, 463 464 /* OpenACC clause: vector_length (integer-expression). */ 465 OMP_CLAUSE_VECTOR_LENGTH, 466 467 /* OpenACC clause: tile ( size-expr-list ). */ 468 OMP_CLAUSE_TILE, 469 470 /* OpenMP internal-only clause to specify grid dimensions of a gridified 471 kernel. */ 472 OMP_CLAUSE__GRIDDIM_ 473 }; 474 475 #undef DEFTREESTRUCT 476 #define DEFTREESTRUCT(ENUM, NAME) ENUM, 477 enum tree_node_structure_enum { 478 #include "treestruct.def" 479 LAST_TS_ENUM 480 }; 481 #undef DEFTREESTRUCT 482 483 enum omp_clause_schedule_kind { 484 OMP_CLAUSE_SCHEDULE_STATIC, 485 OMP_CLAUSE_SCHEDULE_DYNAMIC, 486 OMP_CLAUSE_SCHEDULE_GUIDED, 487 OMP_CLAUSE_SCHEDULE_AUTO, 488 OMP_CLAUSE_SCHEDULE_RUNTIME, 489 OMP_CLAUSE_SCHEDULE_CILKFOR, 490 OMP_CLAUSE_SCHEDULE_MASK = (1 << 3) - 1, 491 OMP_CLAUSE_SCHEDULE_MONOTONIC = (1 << 3), 492 OMP_CLAUSE_SCHEDULE_NONMONOTONIC = (1 << 4), 493 OMP_CLAUSE_SCHEDULE_LAST = 2 * OMP_CLAUSE_SCHEDULE_NONMONOTONIC - 1 494 }; 495 496 enum omp_clause_default_kind { 497 OMP_CLAUSE_DEFAULT_UNSPECIFIED, 498 OMP_CLAUSE_DEFAULT_SHARED, 499 OMP_CLAUSE_DEFAULT_NONE, 500 OMP_CLAUSE_DEFAULT_PRIVATE, 501 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE, 502 OMP_CLAUSE_DEFAULT_LAST 503 }; 504 505 /* There is a TYPE_QUAL value for each type qualifier. They can be 506 combined by bitwise-or to form the complete set of qualifiers for a 507 type. */ 508 enum cv_qualifier { 509 TYPE_UNQUALIFIED = 0x0, 510 TYPE_QUAL_CONST = 0x1, 511 TYPE_QUAL_VOLATILE = 0x2, 512 TYPE_QUAL_RESTRICT = 0x4, 513 TYPE_QUAL_ATOMIC = 0x8 514 }; 515 516 /* Standard named or nameless data types of the C compiler. */ 517 enum tree_index { 518 TI_ERROR_MARK, 519 TI_INTQI_TYPE, 520 TI_INTHI_TYPE, 521 TI_INTSI_TYPE, 522 TI_INTDI_TYPE, 523 TI_INTTI_TYPE, 524 525 TI_UINTQI_TYPE, 526 TI_UINTHI_TYPE, 527 TI_UINTSI_TYPE, 528 TI_UINTDI_TYPE, 529 TI_UINTTI_TYPE, 530 531 TI_ATOMICQI_TYPE, 532 TI_ATOMICHI_TYPE, 533 TI_ATOMICSI_TYPE, 534 TI_ATOMICDI_TYPE, 535 TI_ATOMICTI_TYPE, 536 537 TI_UINT16_TYPE, 538 TI_UINT32_TYPE, 539 TI_UINT64_TYPE, 540 541 TI_VOID, 542 543 TI_INTEGER_ZERO, 544 TI_INTEGER_ONE, 545 TI_INTEGER_THREE, 546 TI_INTEGER_MINUS_ONE, 547 TI_NULL_POINTER, 548 549 TI_SIZE_ZERO, 550 TI_SIZE_ONE, 551 552 TI_BITSIZE_ZERO, 553 TI_BITSIZE_ONE, 554 TI_BITSIZE_UNIT, 555 556 TI_PUBLIC, 557 TI_PROTECTED, 558 TI_PRIVATE, 559 560 TI_BOOLEAN_FALSE, 561 TI_BOOLEAN_TRUE, 562 563 TI_FLOAT_TYPE, 564 TI_DOUBLE_TYPE, 565 TI_LONG_DOUBLE_TYPE, 566 567 /* The _FloatN and _FloatNx types must be consecutive, and in the 568 same sequence as the corresponding complex types, which must also 569 be consecutive; _FloatN must come before _FloatNx; the order must 570 also be the same as in the floatn_nx_types array and the RID_* 571 values in c-common.h. This is so that iterations over these 572 types work as intended. */ 573 TI_FLOAT16_TYPE, 574 TI_FLOATN_TYPE_FIRST = TI_FLOAT16_TYPE, 575 TI_FLOATN_NX_TYPE_FIRST = TI_FLOAT16_TYPE, 576 TI_FLOAT32_TYPE, 577 TI_FLOAT64_TYPE, 578 TI_FLOAT128_TYPE, 579 TI_FLOATN_TYPE_LAST = TI_FLOAT128_TYPE, 580 #define NUM_FLOATN_TYPES (TI_FLOATN_TYPE_LAST - TI_FLOATN_TYPE_FIRST + 1) 581 TI_FLOAT32X_TYPE, 582 TI_FLOATNX_TYPE_FIRST = TI_FLOAT32X_TYPE, 583 TI_FLOAT64X_TYPE, 584 TI_FLOAT128X_TYPE, 585 TI_FLOATNX_TYPE_LAST = TI_FLOAT128X_TYPE, 586 TI_FLOATN_NX_TYPE_LAST = TI_FLOAT128X_TYPE, 587 #define NUM_FLOATNX_TYPES (TI_FLOATNX_TYPE_LAST - TI_FLOATNX_TYPE_FIRST + 1) 588 #define NUM_FLOATN_NX_TYPES (TI_FLOATN_NX_TYPE_LAST \ 589 - TI_FLOATN_NX_TYPE_FIRST \ 590 + 1) 591 592 /* Put the complex types after their component types, so that in (sequential) 593 tree streaming we can assert that their component types have already been 594 handled (see tree-streamer.c:record_common_node). */ 595 TI_COMPLEX_INTEGER_TYPE, 596 TI_COMPLEX_FLOAT_TYPE, 597 TI_COMPLEX_DOUBLE_TYPE, 598 TI_COMPLEX_LONG_DOUBLE_TYPE, 599 600 TI_COMPLEX_FLOAT16_TYPE, 601 TI_COMPLEX_FLOATN_NX_TYPE_FIRST = TI_COMPLEX_FLOAT16_TYPE, 602 TI_COMPLEX_FLOAT32_TYPE, 603 TI_COMPLEX_FLOAT64_TYPE, 604 TI_COMPLEX_FLOAT128_TYPE, 605 TI_COMPLEX_FLOAT32X_TYPE, 606 TI_COMPLEX_FLOAT64X_TYPE, 607 TI_COMPLEX_FLOAT128X_TYPE, 608 609 TI_FLOAT_PTR_TYPE, 610 TI_DOUBLE_PTR_TYPE, 611 TI_LONG_DOUBLE_PTR_TYPE, 612 TI_INTEGER_PTR_TYPE, 613 614 TI_VOID_TYPE, 615 TI_PTR_TYPE, 616 TI_CONST_PTR_TYPE, 617 TI_SIZE_TYPE, 618 TI_PID_TYPE, 619 TI_PTRDIFF_TYPE, 620 TI_VA_LIST_TYPE, 621 TI_VA_LIST_GPR_COUNTER_FIELD, 622 TI_VA_LIST_FPR_COUNTER_FIELD, 623 TI_BOOLEAN_TYPE, 624 TI_FILEPTR_TYPE, 625 TI_CONST_TM_PTR_TYPE, 626 TI_POINTER_SIZED_TYPE, 627 628 TI_POINTER_BOUNDS_TYPE, 629 630 TI_DFLOAT32_TYPE, 631 TI_DFLOAT64_TYPE, 632 TI_DFLOAT128_TYPE, 633 TI_DFLOAT32_PTR_TYPE, 634 TI_DFLOAT64_PTR_TYPE, 635 TI_DFLOAT128_PTR_TYPE, 636 637 TI_VOID_LIST_NODE, 638 639 TI_MAIN_IDENTIFIER, 640 641 TI_SAT_SFRACT_TYPE, 642 TI_SAT_FRACT_TYPE, 643 TI_SAT_LFRACT_TYPE, 644 TI_SAT_LLFRACT_TYPE, 645 TI_SAT_USFRACT_TYPE, 646 TI_SAT_UFRACT_TYPE, 647 TI_SAT_ULFRACT_TYPE, 648 TI_SAT_ULLFRACT_TYPE, 649 TI_SFRACT_TYPE, 650 TI_FRACT_TYPE, 651 TI_LFRACT_TYPE, 652 TI_LLFRACT_TYPE, 653 TI_USFRACT_TYPE, 654 TI_UFRACT_TYPE, 655 TI_ULFRACT_TYPE, 656 TI_ULLFRACT_TYPE, 657 TI_SAT_SACCUM_TYPE, 658 TI_SAT_ACCUM_TYPE, 659 TI_SAT_LACCUM_TYPE, 660 TI_SAT_LLACCUM_TYPE, 661 TI_SAT_USACCUM_TYPE, 662 TI_SAT_UACCUM_TYPE, 663 TI_SAT_ULACCUM_TYPE, 664 TI_SAT_ULLACCUM_TYPE, 665 TI_SACCUM_TYPE, 666 TI_ACCUM_TYPE, 667 TI_LACCUM_TYPE, 668 TI_LLACCUM_TYPE, 669 TI_USACCUM_TYPE, 670 TI_UACCUM_TYPE, 671 TI_ULACCUM_TYPE, 672 TI_ULLACCUM_TYPE, 673 TI_QQ_TYPE, 674 TI_HQ_TYPE, 675 TI_SQ_TYPE, 676 TI_DQ_TYPE, 677 TI_TQ_TYPE, 678 TI_UQQ_TYPE, 679 TI_UHQ_TYPE, 680 TI_USQ_TYPE, 681 TI_UDQ_TYPE, 682 TI_UTQ_TYPE, 683 TI_SAT_QQ_TYPE, 684 TI_SAT_HQ_TYPE, 685 TI_SAT_SQ_TYPE, 686 TI_SAT_DQ_TYPE, 687 TI_SAT_TQ_TYPE, 688 TI_SAT_UQQ_TYPE, 689 TI_SAT_UHQ_TYPE, 690 TI_SAT_USQ_TYPE, 691 TI_SAT_UDQ_TYPE, 692 TI_SAT_UTQ_TYPE, 693 TI_HA_TYPE, 694 TI_SA_TYPE, 695 TI_DA_TYPE, 696 TI_TA_TYPE, 697 TI_UHA_TYPE, 698 TI_USA_TYPE, 699 TI_UDA_TYPE, 700 TI_UTA_TYPE, 701 TI_SAT_HA_TYPE, 702 TI_SAT_SA_TYPE, 703 TI_SAT_DA_TYPE, 704 TI_SAT_TA_TYPE, 705 TI_SAT_UHA_TYPE, 706 TI_SAT_USA_TYPE, 707 TI_SAT_UDA_TYPE, 708 TI_SAT_UTA_TYPE, 709 710 TI_OPTIMIZATION_DEFAULT, 711 TI_OPTIMIZATION_CURRENT, 712 TI_TARGET_OPTION_DEFAULT, 713 TI_TARGET_OPTION_CURRENT, 714 TI_CURRENT_TARGET_PRAGMA, 715 TI_CURRENT_OPTIMIZE_PRAGMA, 716 717 TI_MAX 718 }; 719 720 /* An enumeration of the standard C integer types. These must be 721 ordered so that shorter types appear before longer ones, and so 722 that signed types appear before unsigned ones, for the correct 723 functioning of interpret_integer() in c-lex.c. */ 724 enum integer_type_kind { 725 itk_char, 726 itk_signed_char, 727 itk_unsigned_char, 728 itk_short, 729 itk_unsigned_short, 730 itk_int, 731 itk_unsigned_int, 732 itk_long, 733 itk_unsigned_long, 734 itk_long_long, 735 itk_unsigned_long_long, 736 737 itk_intN_0, 738 itk_unsigned_intN_0, 739 itk_intN_1, 740 itk_unsigned_intN_1, 741 itk_intN_2, 742 itk_unsigned_intN_2, 743 itk_intN_3, 744 itk_unsigned_intN_3, 745 746 itk_none 747 }; 748 749 /* A pointer-to-function member type looks like: 750 751 struct { 752 __P __pfn; 753 ptrdiff_t __delta; 754 }; 755 756 If __pfn is NULL, it is a NULL pointer-to-member-function. 757 758 (Because the vtable is always the first thing in the object, we 759 don't need its offset.) If the function is virtual, then PFN is 760 one plus twice the index into the vtable; otherwise, it is just a 761 pointer to the function. 762 763 Unfortunately, using the lowest bit of PFN doesn't work in 764 architectures that don't impose alignment requirements on function 765 addresses, or that use the lowest bit to tell one ISA from another, 766 for example. For such architectures, we use the lowest bit of 767 DELTA instead of the lowest bit of the PFN, and DELTA will be 768 multiplied by 2. */ 769 enum ptrmemfunc_vbit_where_t { 770 ptrmemfunc_vbit_in_pfn, 771 ptrmemfunc_vbit_in_delta 772 }; 773 774 /* Flags that may be passed in the third argument of decl_attributes, and 775 to handler functions for attributes. */ 776 enum attribute_flags { 777 /* The type passed in is the type of a DECL, and any attributes that 778 should be passed in again to be applied to the DECL rather than the 779 type should be returned. */ 780 ATTR_FLAG_DECL_NEXT = 1, 781 /* The type passed in is a function return type, and any attributes that 782 should be passed in again to be applied to the function type rather 783 than the return type should be returned. */ 784 ATTR_FLAG_FUNCTION_NEXT = 2, 785 /* The type passed in is an array element type, and any attributes that 786 should be passed in again to be applied to the array type rather 787 than the element type should be returned. */ 788 ATTR_FLAG_ARRAY_NEXT = 4, 789 /* The type passed in is a structure, union or enumeration type being 790 created, and should be modified in place. */ 791 ATTR_FLAG_TYPE_IN_PLACE = 8, 792 /* The attributes are being applied by default to a library function whose 793 name indicates known behavior, and should be silently ignored if they 794 are not in fact compatible with the function type. */ 795 ATTR_FLAG_BUILT_IN = 16, 796 /* A given attribute has been parsed as a C++-11 attribute. */ 797 ATTR_FLAG_CXX11 = 32 798 }; 799 800 /* Types used to represent sizes. */ 801 enum size_type_kind { 802 stk_sizetype, /* Normal representation of sizes in bytes. */ 803 stk_ssizetype, /* Signed representation of sizes in bytes. */ 804 stk_bitsizetype, /* Normal representation of sizes in bits. */ 805 stk_sbitsizetype, /* Signed representation of sizes in bits. */ 806 stk_type_kind_last 807 }; 808 809 enum operand_equal_flag { 810 OEP_ONLY_CONST = 1, 811 OEP_PURE_SAME = 2, 812 OEP_MATCH_SIDE_EFFECTS = 4, 813 OEP_ADDRESS_OF = 8, 814 /* Internal within operand_equal_p: */ 815 OEP_NO_HASH_CHECK = 16, 816 /* Internal within inchash::add_expr: */ 817 OEP_HASH_CHECK = 32, 818 /* Makes operand_equal_p handle more expressions: */ 819 OEP_LEXICOGRAPHIC = 64 820 }; 821 822 /* Enum and arrays used for tree allocation stats. 823 Keep in sync with tree.c:tree_node_kind_names. */ 824 enum tree_node_kind { 825 d_kind, 826 t_kind, 827 b_kind, 828 s_kind, 829 r_kind, 830 e_kind, 831 c_kind, 832 id_kind, 833 vec_kind, 834 binfo_kind, 835 ssa_name_kind, 836 constr_kind, 837 x_kind, 838 lang_decl, 839 lang_type, 840 omp_clause_kind, 841 all_kinds 842 }; 843 844 enum annot_expr_kind { 845 annot_expr_ivdep_kind, 846 annot_expr_no_vector_kind, 847 annot_expr_vector_kind, 848 annot_expr_kind_last 849 }; 850 851 /*--------------------------------------------------------------------------- 852 Type definitions 853 ---------------------------------------------------------------------------*/ 854 /* When processing aliases at the symbol table level, we need the 855 declaration of target. For this reason we need to queue aliases and 856 process them after all declarations has been produced. */ 857 struct GTY(()) alias_pair { 858 tree decl; 859 tree target; 860 }; 861 862 /* An initialization priority. */ 863 typedef unsigned short priority_type; 864 865 /* The type of a callback function for walking over tree structure. */ 866 typedef tree (*walk_tree_fn) (tree *, int *, void *); 867 868 /* The type of a callback function that represents a custom walk_tree. */ 869 typedef tree (*walk_tree_lh) (tree *, int *, tree (*) (tree *, int *, void *), 870 void *, hash_set<tree> *); 871 872 873 /*--------------------------------------------------------------------------- 874 Main data structures 875 ---------------------------------------------------------------------------*/ 876 /* A tree node can represent a data type, a variable, an expression 877 or a statement. Each node has a TREE_CODE which says what kind of 878 thing it represents. Some common codes are: 879 INTEGER_TYPE -- represents a type of integers. 880 ARRAY_TYPE -- represents a type of pointer. 881 VAR_DECL -- represents a declared variable. 882 INTEGER_CST -- represents a constant integer value. 883 PLUS_EXPR -- represents a sum (an expression). 884 885 As for the contents of a tree node: there are some fields 886 that all nodes share. Each TREE_CODE has various special-purpose 887 fields as well. The fields of a node are never accessed directly, 888 always through accessor macros. */ 889 890 /* Every kind of tree node starts with this structure, 891 so all nodes have these fields. 892 893 See the accessor macros, defined below, for documentation of the 894 fields, and the table below which connects the fields and the 895 accessor macros. */ 896 897 struct GTY(()) tree_base { 898 ENUM_BITFIELD(tree_code) code : 16; 899 900 unsigned side_effects_flag : 1; 901 unsigned constant_flag : 1; 902 unsigned addressable_flag : 1; 903 unsigned volatile_flag : 1; 904 unsigned readonly_flag : 1; 905 unsigned asm_written_flag: 1; 906 unsigned nowarning_flag : 1; 907 unsigned visited : 1; 908 909 unsigned used_flag : 1; 910 unsigned nothrow_flag : 1; 911 unsigned static_flag : 1; 912 unsigned public_flag : 1; 913 unsigned private_flag : 1; 914 unsigned protected_flag : 1; 915 unsigned deprecated_flag : 1; 916 unsigned default_def_flag : 1; 917 918 union { 919 /* The bits in the following structure should only be used with 920 accessor macros that constrain inputs with tree checking. */ 921 struct { 922 unsigned lang_flag_0 : 1; 923 unsigned lang_flag_1 : 1; 924 unsigned lang_flag_2 : 1; 925 unsigned lang_flag_3 : 1; 926 unsigned lang_flag_4 : 1; 927 unsigned lang_flag_5 : 1; 928 unsigned lang_flag_6 : 1; 929 unsigned saturating_flag : 1; 930 931 unsigned unsigned_flag : 1; 932 unsigned packed_flag : 1; 933 unsigned user_align : 1; 934 unsigned nameless_flag : 1; 935 unsigned atomic_flag : 1; 936 unsigned spare0 : 3; 937 938 unsigned spare1 : 8; 939 940 /* This field is only used with TREE_TYPE nodes; the only reason it is 941 present in tree_base instead of tree_type is to save space. The size 942 of the field must be large enough to hold addr_space_t values. */ 943 unsigned address_space : 8; 944 } bits; 945 946 /* The following fields are present in tree_base to save space. The 947 nodes using them do not require any of the flags above and so can 948 make better use of the 4-byte sized word. */ 949 950 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */ 951 struct { 952 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in 953 its native precision. */ 954 unsigned char unextended; 955 956 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to 957 wider precisions based on its TYPE_SIGN. */ 958 unsigned char extended; 959 960 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in 961 offset_int precision, with smaller integers being extended 962 according to their TYPE_SIGN. This is equal to one of the two 963 fields above but is cached for speed. */ 964 unsigned char offset; 965 } int_length; 966 967 /* VEC length. This field is only used with TREE_VEC. */ 968 int length; 969 970 /* SSA version number. This field is only used with SSA_NAME. */ 971 unsigned int version; 972 973 /* Internal function code. */ 974 enum internal_fn ifn; 975 976 /* The following two fields are used for MEM_REF and TARGET_MEM_REF 977 expression trees and specify known data non-dependences. For 978 two memory references in a function they are known to not 979 alias if dependence_info.clique are equal and dependence_info.base 980 are distinct. Clique number zero means there is no information, 981 clique number one is populated from function global information 982 and thus needs no remapping on transforms like loop unrolling. */ 983 struct { 984 unsigned short clique; 985 unsigned short base; 986 } dependence_info; 987 } GTY((skip(""))) u; 988 }; 989 990 /* The following table lists the uses of each of the above flags and 991 for which types of nodes they are defined. 992 993 addressable_flag: 994 995 TREE_ADDRESSABLE in 996 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL 997 SSA_NAME 998 all types 999 CONSTRUCTOR, IDENTIFIER_NODE 1000 STMT_EXPR 1001 1002 CALL_EXPR_TAILCALL in 1003 CALL_EXPR 1004 1005 CASE_LOW_SEEN in 1006 CASE_LABEL_EXPR 1007 1008 PREDICT_EXPR_OUTCOME in 1009 PREDICT_EXPR 1010 1011 static_flag: 1012 1013 TREE_STATIC in 1014 VAR_DECL, FUNCTION_DECL 1015 CONSTRUCTOR 1016 1017 TREE_NO_TRAMPOLINE in 1018 ADDR_EXPR 1019 1020 BINFO_VIRTUAL_P in 1021 TREE_BINFO 1022 1023 TREE_SYMBOL_REFERENCED in 1024 IDENTIFIER_NODE 1025 1026 CLEANUP_EH_ONLY in 1027 TARGET_EXPR, WITH_CLEANUP_EXPR 1028 1029 TRY_CATCH_IS_CLEANUP in 1030 TRY_CATCH_EXPR 1031 1032 ASM_INPUT_P in 1033 ASM_EXPR 1034 1035 TYPE_REF_CAN_ALIAS_ALL in 1036 POINTER_TYPE, REFERENCE_TYPE 1037 1038 CASE_HIGH_SEEN in 1039 CASE_LABEL_EXPR 1040 1041 ENUM_IS_SCOPED in 1042 ENUMERAL_TYPE 1043 1044 TRANSACTION_EXPR_OUTER in 1045 TRANSACTION_EXPR 1046 1047 SSA_NAME_ANTI_RANGE_P in 1048 SSA_NAME 1049 1050 MUST_TAIL_CALL in 1051 CALL_EXPR 1052 1053 public_flag: 1054 1055 TREE_OVERFLOW in 1056 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST 1057 1058 TREE_PUBLIC in 1059 VAR_DECL, FUNCTION_DECL 1060 IDENTIFIER_NODE 1061 1062 CONSTRUCTOR_NO_CLEARING in 1063 CONSTRUCTOR 1064 1065 ASM_VOLATILE_P in 1066 ASM_EXPR 1067 1068 CALL_EXPR_VA_ARG_PACK in 1069 CALL_EXPR 1070 1071 TYPE_CACHED_VALUES_P in 1072 all types 1073 1074 SAVE_EXPR_RESOLVED_P in 1075 SAVE_EXPR 1076 1077 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in 1078 OMP_CLAUSE_LASTPRIVATE 1079 1080 OMP_CLAUSE_PRIVATE_DEBUG in 1081 OMP_CLAUSE_PRIVATE 1082 1083 OMP_CLAUSE_LINEAR_NO_COPYIN in 1084 OMP_CLAUSE_LINEAR 1085 1086 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in 1087 OMP_CLAUSE_MAP 1088 1089 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in 1090 OMP_CLAUSE_REDUCTION 1091 1092 TRANSACTION_EXPR_RELAXED in 1093 TRANSACTION_EXPR 1094 1095 FALLTHROUGH_LABEL_P in 1096 LABEL_DECL 1097 1098 SSA_NAME_IS_VIRTUAL_OPERAND in 1099 SSA_NAME 1100 1101 private_flag: 1102 1103 TREE_PRIVATE in 1104 all decls 1105 1106 CALL_EXPR_RETURN_SLOT_OPT in 1107 CALL_EXPR 1108 1109 OMP_SECTION_LAST in 1110 OMP_SECTION 1111 1112 OMP_PARALLEL_COMBINED in 1113 OMP_PARALLEL 1114 1115 OMP_ATOMIC_SEQ_CST in 1116 OMP_ATOMIC* 1117 1118 OMP_CLAUSE_PRIVATE_OUTER_REF in 1119 OMP_CLAUSE_PRIVATE 1120 1121 OMP_CLAUSE_LINEAR_NO_COPYOUT in 1122 OMP_CLAUSE_LINEAR 1123 1124 TYPE_REF_IS_RVALUE in 1125 REFERENCE_TYPE 1126 1127 ENUM_IS_OPAQUE in 1128 ENUMERAL_TYPE 1129 1130 protected_flag: 1131 1132 TREE_PROTECTED in 1133 BLOCK 1134 all decls 1135 1136 CALL_FROM_THUNK_P and 1137 CALL_ALLOCA_FOR_VAR_P in 1138 CALL_EXPR 1139 1140 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in 1141 OMP_CLAUSE_LINEAR 1142 1143 ASM_INLINE_P in 1144 ASM_EXPR 1145 1146 side_effects_flag: 1147 1148 TREE_SIDE_EFFECTS in 1149 all expressions 1150 all decls 1151 all constants 1152 1153 FORCED_LABEL in 1154 LABEL_DECL 1155 1156 volatile_flag: 1157 1158 TREE_THIS_VOLATILE in 1159 all expressions 1160 all decls 1161 1162 TYPE_VOLATILE in 1163 all types 1164 1165 readonly_flag: 1166 1167 TREE_READONLY in 1168 all expressions 1169 all decls 1170 1171 TYPE_READONLY in 1172 all types 1173 1174 constant_flag: 1175 1176 TREE_CONSTANT in 1177 all expressions 1178 all decls 1179 all constants 1180 1181 TYPE_SIZES_GIMPLIFIED in 1182 all types 1183 1184 unsigned_flag: 1185 1186 TYPE_UNSIGNED in 1187 all types 1188 1189 DECL_UNSIGNED in 1190 all decls 1191 1192 asm_written_flag: 1193 1194 TREE_ASM_WRITTEN in 1195 VAR_DECL, FUNCTION_DECL, TYPE_DECL 1196 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE 1197 BLOCK, STRING_CST 1198 1199 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in 1200 SSA_NAME 1201 1202 used_flag: 1203 1204 TREE_USED in 1205 all expressions 1206 all decls 1207 IDENTIFIER_NODE 1208 1209 nothrow_flag: 1210 1211 TREE_NOTHROW in 1212 CALL_EXPR 1213 FUNCTION_DECL 1214 1215 TREE_THIS_NOTRAP in 1216 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF 1217 1218 SSA_NAME_IN_FREE_LIST in 1219 SSA_NAME 1220 1221 DECL_NONALIASED in 1222 VAR_DECL 1223 1224 deprecated_flag: 1225 1226 TREE_DEPRECATED in 1227 all decls 1228 all types 1229 1230 IDENTIFIER_TRANSPARENT_ALIAS in 1231 IDENTIFIER_NODE 1232 1233 visited: 1234 1235 TREE_VISITED in 1236 all trees (used liberally by many passes) 1237 1238 saturating_flag: 1239 1240 TYPE_REVERSE_STORAGE_ORDER in 1241 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE, ARRAY_TYPE 1242 1243 TYPE_SATURATING in 1244 other types 1245 1246 VAR_DECL_IS_VIRTUAL_OPERAND in 1247 VAR_DECL 1248 1249 nowarning_flag: 1250 1251 TREE_NO_WARNING in 1252 all expressions 1253 all decls 1254 1255 TYPE_ARTIFICIAL in 1256 all types 1257 1258 default_def_flag: 1259 1260 TYPE_FINAL_P in 1261 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE 1262 1263 TYPE_VECTOR_OPAQUE in 1264 VECTOR_TYPE 1265 1266 SSA_NAME_IS_DEFAULT_DEF in 1267 SSA_NAME 1268 1269 DECL_NONLOCAL_FRAME in 1270 VAR_DECL 1271 1272 REF_REVERSE_STORAGE_ORDER in 1273 BIT_FIELD_REF, MEM_REF 1274 1275 FUNC_ADDR_BY_DESCRIPTOR in 1276 ADDR_EXPR 1277 1278 CALL_EXPR_BY_DESCRIPTOR in 1279 CALL_EXPR 1280 */ 1281 1282 struct GTY(()) tree_typed { 1283 struct tree_base base; 1284 tree type; 1285 }; 1286 1287 struct GTY(()) tree_common { 1288 struct tree_typed typed; 1289 tree chain; 1290 }; 1291 1292 struct GTY(()) tree_int_cst { 1293 struct tree_typed typed; 1294 HOST_WIDE_INT val[1]; 1295 }; 1296 1297 1298 struct GTY(()) tree_real_cst { 1299 struct tree_typed typed; 1300 struct real_value * real_cst_ptr; 1301 }; 1302 1303 struct GTY(()) tree_fixed_cst { 1304 struct tree_typed typed; 1305 struct fixed_value * fixed_cst_ptr; 1306 }; 1307 1308 struct GTY(()) tree_string { 1309 struct tree_typed typed; 1310 int length; 1311 char str[1]; 1312 }; 1313 1314 struct GTY(()) tree_complex { 1315 struct tree_typed typed; 1316 tree real; 1317 tree imag; 1318 }; 1319 1320 struct GTY(()) tree_vector { 1321 struct tree_typed typed; 1322 tree GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts[1]; 1323 }; 1324 1325 struct GTY(()) tree_identifier { 1326 struct tree_common common; 1327 struct ht_identifier id; 1328 }; 1329 1330 struct GTY(()) tree_list { 1331 struct tree_common common; 1332 tree purpose; 1333 tree value; 1334 }; 1335 1336 struct GTY(()) tree_vec { 1337 struct tree_common common; 1338 tree GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a[1]; 1339 }; 1340 1341 /* A single element of a CONSTRUCTOR. VALUE holds the actual value of the 1342 element. INDEX can optionally design the position of VALUE: in arrays, 1343 it is the index where VALUE has to be placed; in structures, it is the 1344 FIELD_DECL of the member. */ 1345 struct GTY(()) constructor_elt { 1346 tree index; 1347 tree value; 1348 }; 1349 1350 struct GTY(()) tree_constructor { 1351 struct tree_typed typed; 1352 vec<constructor_elt, va_gc> *elts; 1353 }; 1354 1355 enum omp_clause_depend_kind 1356 { 1357 OMP_CLAUSE_DEPEND_IN, 1358 OMP_CLAUSE_DEPEND_OUT, 1359 OMP_CLAUSE_DEPEND_INOUT, 1360 OMP_CLAUSE_DEPEND_SOURCE, 1361 OMP_CLAUSE_DEPEND_SINK, 1362 OMP_CLAUSE_DEPEND_LAST 1363 }; 1364 1365 enum omp_clause_proc_bind_kind 1366 { 1367 /* Numbers should match omp_proc_bind_t enum in omp.h. */ 1368 OMP_CLAUSE_PROC_BIND_FALSE = 0, 1369 OMP_CLAUSE_PROC_BIND_TRUE = 1, 1370 OMP_CLAUSE_PROC_BIND_MASTER = 2, 1371 OMP_CLAUSE_PROC_BIND_CLOSE = 3, 1372 OMP_CLAUSE_PROC_BIND_SPREAD = 4, 1373 OMP_CLAUSE_PROC_BIND_LAST 1374 }; 1375 1376 enum omp_clause_linear_kind 1377 { 1378 OMP_CLAUSE_LINEAR_DEFAULT, 1379 OMP_CLAUSE_LINEAR_REF, 1380 OMP_CLAUSE_LINEAR_VAL, 1381 OMP_CLAUSE_LINEAR_UVAL 1382 }; 1383 1384 struct GTY(()) tree_exp { 1385 struct tree_typed typed; 1386 location_t locus; 1387 tree GTY ((special ("tree_exp"), 1388 desc ("TREE_CODE ((tree) &%0)"))) 1389 operands[1]; 1390 }; 1391 1392 /* Immediate use linking structure. This structure is used for maintaining 1393 a doubly linked list of uses of an SSA_NAME. */ 1394 struct GTY(()) ssa_use_operand_t { 1395 struct ssa_use_operand_t* GTY((skip(""))) prev; 1396 struct ssa_use_operand_t* GTY((skip(""))) next; 1397 /* Immediate uses for a given SSA name are maintained as a cyclic 1398 list. To recognize the root of this list, the location field 1399 needs to point to the original SSA name. Since statements and 1400 SSA names are of different data types, we need this union. See 1401 the explanation in struct imm_use_iterator. */ 1402 union { gimple *stmt; tree ssa_name; } GTY((skip(""))) loc; 1403 tree *GTY((skip(""))) use; 1404 }; 1405 1406 struct GTY(()) tree_ssa_name { 1407 struct tree_typed typed; 1408 1409 /* _DECL wrapped by this SSA name. */ 1410 tree var; 1411 1412 /* Statement that defines this SSA name. */ 1413 gimple *def_stmt; 1414 1415 /* Value range information. */ 1416 union ssa_name_info_type { 1417 /* Pointer attributes used for alias analysis. */ 1418 struct GTY ((tag ("0"))) ptr_info_def *ptr_info; 1419 /* Value range attributes used for zero/sign extension elimination. */ 1420 struct GTY ((tag ("1"))) range_info_def *range_info; 1421 } GTY ((desc ("%1.typed.type ?" \ 1422 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info; 1423 1424 /* Immediate uses list for this SSA_NAME. */ 1425 struct ssa_use_operand_t imm_uses; 1426 }; 1427 1428 struct GTY(()) phi_arg_d { 1429 /* imm_use MUST be the first element in struct because we do some 1430 pointer arithmetic with it. See phi_arg_index_from_use. */ 1431 struct ssa_use_operand_t imm_use; 1432 tree def; 1433 location_t locus; 1434 }; 1435 1436 struct GTY(()) tree_omp_clause { 1437 struct tree_common common; 1438 location_t locus; 1439 enum omp_clause_code code; 1440 union omp_clause_subcode { 1441 enum omp_clause_default_kind default_kind; 1442 enum omp_clause_schedule_kind schedule_kind; 1443 enum omp_clause_depend_kind depend_kind; 1444 /* See include/gomp-constants.h for enum gomp_map_kind's values. */ 1445 unsigned int map_kind; 1446 enum omp_clause_proc_bind_kind proc_bind_kind; 1447 enum tree_code reduction_code; 1448 enum omp_clause_linear_kind linear_kind; 1449 enum tree_code if_modifier; 1450 /* The dimension a OMP_CLAUSE__GRIDDIM_ clause of a gridified target 1451 construct describes. */ 1452 unsigned int dimension; 1453 } GTY ((skip)) subcode; 1454 1455 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's 1456 usage. */ 1457 gimple_seq gimple_reduction_init; 1458 gimple_seq gimple_reduction_merge; 1459 1460 tree GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]"))) 1461 ops[1]; 1462 }; 1463 1464 struct GTY(()) tree_block { 1465 struct tree_base base; 1466 tree chain; 1467 1468 unsigned abstract_flag : 1; 1469 unsigned block_num : 31; 1470 1471 location_t locus; 1472 location_t end_locus; 1473 1474 tree vars; 1475 vec<tree, va_gc> *nonlocalized_vars; 1476 1477 tree subblocks; 1478 tree supercontext; 1479 tree abstract_origin; 1480 tree fragment_origin; 1481 tree fragment_chain; 1482 1483 /* Pointer to the DWARF lexical block. */ 1484 struct die_struct *die; 1485 }; 1486 1487 struct GTY(()) tree_type_common { 1488 struct tree_common common; 1489 tree size; 1490 tree size_unit; 1491 tree attributes; 1492 unsigned int uid; 1493 1494 unsigned int precision : 10; 1495 unsigned no_force_blk_flag : 1; 1496 unsigned needs_constructing_flag : 1; 1497 unsigned transparent_aggr_flag : 1; 1498 unsigned restrict_flag : 1; 1499 unsigned contains_placeholder_bits : 2; 1500 1501 ENUM_BITFIELD(machine_mode) mode : 8; 1502 1503 unsigned string_flag : 1; 1504 unsigned lang_flag_0 : 1; 1505 unsigned lang_flag_1 : 1; 1506 unsigned lang_flag_2 : 1; 1507 unsigned lang_flag_3 : 1; 1508 unsigned lang_flag_4 : 1; 1509 unsigned lang_flag_5 : 1; 1510 unsigned lang_flag_6 : 1; 1511 unsigned lang_flag_7 : 1; 1512 1513 /* TYPE_ALIGN in log2; this has to be large enough to hold values 1514 of the maximum of BIGGEST_ALIGNMENT and MAX_OFILE_ALIGNMENT, 1515 the latter being usually the larger. For ELF it is 8<<28, 1516 so we need to store the value 32 (not 31, as we need the zero 1517 as well), hence six bits. */ 1518 unsigned align : 6; 1519 unsigned typeless_storage : 1; 1520 unsigned spare : 24; 1521 1522 alias_set_type alias_set; 1523 tree pointer_to; 1524 tree reference_to; 1525 union tree_type_symtab { 1526 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address; 1527 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer; 1528 struct die_struct * GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die; 1529 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab; 1530 tree canonical; 1531 tree next_variant; 1532 tree main_variant; 1533 tree context; 1534 tree name; 1535 }; 1536 1537 struct GTY(()) tree_type_with_lang_specific { 1538 struct tree_type_common common; 1539 /* Points to a structure whose details depend on the language in use. */ 1540 struct lang_type *lang_specific; 1541 }; 1542 1543 struct GTY(()) tree_type_non_common { 1544 struct tree_type_with_lang_specific with_lang_specific; 1545 tree values; 1546 tree minval; 1547 tree maxval; 1548 tree binfo; 1549 }; 1550 1551 struct GTY (()) tree_binfo { 1552 struct tree_common common; 1553 1554 tree offset; 1555 tree vtable; 1556 tree virtuals; 1557 tree vptr_field; 1558 vec<tree, va_gc> *base_accesses; 1559 tree inheritance; 1560 1561 tree vtt_subvtt; 1562 tree vtt_vptr; 1563 1564 vec<tree, va_gc> base_binfos; 1565 }; 1566 1567 struct GTY(()) tree_decl_minimal { 1568 struct tree_common common; 1569 location_t locus; 1570 unsigned int uid; 1571 tree name; 1572 tree context; 1573 }; 1574 1575 struct GTY(()) tree_decl_common { 1576 struct tree_decl_minimal common; 1577 tree size; 1578 1579 ENUM_BITFIELD(machine_mode) mode : 8; 1580 1581 unsigned nonlocal_flag : 1; 1582 unsigned virtual_flag : 1; 1583 unsigned ignored_flag : 1; 1584 unsigned abstract_flag : 1; 1585 unsigned artificial_flag : 1; 1586 unsigned preserve_flag: 1; 1587 unsigned debug_expr_is_from : 1; 1588 1589 unsigned lang_flag_0 : 1; 1590 unsigned lang_flag_1 : 1; 1591 unsigned lang_flag_2 : 1; 1592 unsigned lang_flag_3 : 1; 1593 unsigned lang_flag_4 : 1; 1594 unsigned lang_flag_5 : 1; 1595 unsigned lang_flag_6 : 1; 1596 unsigned lang_flag_7 : 1; 1597 unsigned lang_flag_8 : 1; 1598 1599 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */ 1600 unsigned decl_flag_0 : 1; 1601 /* In FIELD_DECL, this is DECL_BIT_FIELD 1602 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL. 1603 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */ 1604 unsigned decl_flag_1 : 1; 1605 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P 1606 In VAR_DECL, PARM_DECL and RESULT_DECL, this is 1607 DECL_HAS_VALUE_EXPR_P. */ 1608 unsigned decl_flag_2 : 1; 1609 /* 1 bit unused. */ 1610 unsigned decl_flag_3 : 1; 1611 /* Logically, these two would go in a theoretical base shared by var and 1612 parm decl. */ 1613 unsigned gimple_reg_flag : 1; 1614 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */ 1615 unsigned decl_by_reference_flag : 1; 1616 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */ 1617 unsigned decl_read_flag : 1; 1618 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */ 1619 /* In a PARM_DECL, this is DECL_HIDDEN_STRING_LENGTH. */ 1620 unsigned decl_nonshareable_flag : 1; 1621 1622 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */ 1623 unsigned int off_align : 6; 1624 1625 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */ 1626 unsigned int align : 6; 1627 1628 /* 20 bits unused. */ 1629 1630 /* UID for points-to sets, stable over copying from inlining. */ 1631 unsigned int pt_uid; 1632 1633 tree size_unit; 1634 tree initial; 1635 tree attributes; 1636 tree abstract_origin; 1637 1638 /* Points to a structure whose details depend on the language in use. */ 1639 struct lang_decl *lang_specific; 1640 }; 1641 1642 struct GTY(()) tree_decl_with_rtl { 1643 struct tree_decl_common common; 1644 rtx rtl; 1645 }; 1646 1647 struct GTY(()) tree_field_decl { 1648 struct tree_decl_common common; 1649 1650 tree offset; 1651 tree bit_field_type; 1652 tree qualifier; 1653 tree bit_offset; 1654 tree fcontext; 1655 }; 1656 1657 struct GTY(()) tree_label_decl { 1658 struct tree_decl_with_rtl common; 1659 int label_decl_uid; 1660 int eh_landing_pad_nr; 1661 }; 1662 1663 struct GTY(()) tree_result_decl { 1664 struct tree_decl_with_rtl common; 1665 }; 1666 1667 struct GTY(()) tree_const_decl { 1668 struct tree_decl_common common; 1669 }; 1670 1671 struct GTY(()) tree_parm_decl { 1672 struct tree_decl_with_rtl common; 1673 rtx incoming_rtl; 1674 }; 1675 1676 struct GTY(()) tree_decl_with_vis { 1677 struct tree_decl_with_rtl common; 1678 tree assembler_name; 1679 struct symtab_node *symtab_node; 1680 1681 /* Belong to VAR_DECL exclusively. */ 1682 unsigned defer_output : 1; 1683 unsigned hard_register : 1; 1684 unsigned common_flag : 1; 1685 unsigned in_text_section : 1; 1686 unsigned in_constant_pool : 1; 1687 unsigned dllimport_flag : 1; 1688 /* Don't belong to VAR_DECL exclusively. */ 1689 unsigned weak_flag : 1; 1690 1691 unsigned seen_in_bind_expr : 1; 1692 unsigned comdat_flag : 1; 1693 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */ 1694 ENUM_BITFIELD(symbol_visibility) visibility : 2; 1695 unsigned visibility_specified : 1; 1696 1697 /* Belong to FUNCTION_DECL exclusively. */ 1698 unsigned init_priority_p : 1; 1699 /* Used by C++ only. Might become a generic decl flag. */ 1700 unsigned shadowed_for_var_p : 1; 1701 /* Belong to FUNCTION_DECL exclusively. */ 1702 unsigned cxx_constructor : 1; 1703 /* Belong to FUNCTION_DECL exclusively. */ 1704 unsigned cxx_destructor : 1; 1705 /* Belong to FUNCTION_DECL exclusively. */ 1706 unsigned final : 1; 1707 /* Belong to FUNCTION_DECL exclusively. */ 1708 unsigned regdecl_flag : 1; 1709 /* 14 unused bits. */ 1710 }; 1711 1712 struct GTY(()) tree_var_decl { 1713 struct tree_decl_with_vis common; 1714 }; 1715 1716 struct GTY(()) tree_decl_non_common { 1717 struct tree_decl_with_vis common; 1718 /* Almost all FE's use this. */ 1719 tree result; 1720 }; 1721 1722 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the 1723 arguments/result/saved_tree fields by front ends. It was either inherit 1724 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL, 1725 which seemed a bit strange. */ 1726 1727 struct GTY(()) tree_function_decl { 1728 struct tree_decl_non_common common; 1729 1730 struct function *f; 1731 1732 /* Arguments of the function. */ 1733 tree arguments; 1734 /* The personality function. Used for stack unwinding. */ 1735 tree personality; 1736 1737 /* Function specific options that are used by this function. */ 1738 tree function_specific_target; /* target options */ 1739 tree function_specific_optimization; /* optimization options */ 1740 1741 /* Generic function body. */ 1742 tree saved_tree; 1743 /* Index within a virtual table. */ 1744 tree vindex; 1745 1746 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is 1747 DECL_FUNCTION_CODE. Otherwise unused. 1748 ??? The bitfield needs to be able to hold all target function 1749 codes as well. */ 1750 ENUM_BITFIELD(built_in_function) function_code : 12; 1751 ENUM_BITFIELD(built_in_class) built_in_class : 2; 1752 1753 unsigned static_ctor_flag : 1; 1754 unsigned static_dtor_flag : 1; 1755 1756 unsigned uninlinable : 1; 1757 unsigned possibly_inlined : 1; 1758 unsigned novops_flag : 1; 1759 unsigned returns_twice_flag : 1; 1760 unsigned malloc_flag : 1; 1761 unsigned operator_new_flag : 1; 1762 unsigned declared_inline_flag : 1; 1763 unsigned no_inline_warning_flag : 1; 1764 1765 unsigned no_instrument_function_entry_exit : 1; 1766 unsigned no_limit_stack : 1; 1767 unsigned disregard_inline_limits : 1; 1768 unsigned pure_flag : 1; 1769 unsigned looping_const_or_pure_flag : 1; 1770 unsigned has_debug_args_flag : 1; 1771 unsigned tm_clone_flag : 1; 1772 unsigned versioned_function : 1; 1773 /* No bits left. */ 1774 }; 1775 1776 struct GTY(()) tree_translation_unit_decl { 1777 struct tree_decl_common common; 1778 /* Source language of this translation unit. Used for DWARF output. */ 1779 const char * GTY((skip(""))) language; 1780 /* TODO: Non-optimization used to build this translation unit. */ 1781 /* TODO: Root of a partial DWARF tree for global types and decls. */ 1782 }; 1783 1784 struct GTY(()) tree_type_decl { 1785 struct tree_decl_non_common common; 1786 1787 }; 1788 1789 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node 1790 { 1791 struct tree_statement_list_node *prev; 1792 struct tree_statement_list_node *next; 1793 tree stmt; 1794 }; 1795 1796 struct GTY(()) tree_statement_list 1797 { 1798 struct tree_typed typed; 1799 struct tree_statement_list_node *head; 1800 struct tree_statement_list_node *tail; 1801 }; 1802 1803 1804 /* Optimization options used by a function. */ 1805 1806 struct GTY(()) tree_optimization_option { 1807 struct tree_base base; 1808 1809 /* The optimization options used by the user. */ 1810 struct cl_optimization *opts; 1811 1812 /* Target optabs for this set of optimization options. This is of 1813 type `struct target_optabs *'. */ 1814 void *GTY ((atomic)) optabs; 1815 1816 /* The value of this_target_optabs against which the optabs above were 1817 generated. */ 1818 struct target_optabs *GTY ((skip)) base_optabs; 1819 }; 1820 1821 /* Forward declaration, defined in target-globals.h. */ 1822 1823 struct GTY(()) target_globals; 1824 1825 /* Target options used by a function. */ 1826 1827 struct GTY(()) tree_target_option { 1828 struct tree_base base; 1829 1830 /* Target globals for the corresponding target option. */ 1831 struct target_globals *globals; 1832 1833 /* The optimization options used by the user. */ 1834 struct cl_target_option *opts; 1835 }; 1836 1837 /* Define the overall contents of a tree node. 1838 It may be any of the structures declared above 1839 for various types of node. */ 1840 union GTY ((ptr_alias (union lang_tree_node), 1841 desc ("tree_node_structure (&%h)"), variable_size)) tree_node { 1842 struct tree_base GTY ((tag ("TS_BASE"))) base; 1843 struct tree_typed GTY ((tag ("TS_TYPED"))) typed; 1844 struct tree_common GTY ((tag ("TS_COMMON"))) common; 1845 struct tree_int_cst GTY ((tag ("TS_INT_CST"))) int_cst; 1846 struct tree_real_cst GTY ((tag ("TS_REAL_CST"))) real_cst; 1847 struct tree_fixed_cst GTY ((tag ("TS_FIXED_CST"))) fixed_cst; 1848 struct tree_vector GTY ((tag ("TS_VECTOR"))) vector; 1849 struct tree_string GTY ((tag ("TS_STRING"))) string; 1850 struct tree_complex GTY ((tag ("TS_COMPLEX"))) complex; 1851 struct tree_identifier GTY ((tag ("TS_IDENTIFIER"))) identifier; 1852 struct tree_decl_minimal GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal; 1853 struct tree_decl_common GTY ((tag ("TS_DECL_COMMON"))) decl_common; 1854 struct tree_decl_with_rtl GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl; 1855 struct tree_decl_non_common GTY ((tag ("TS_DECL_NON_COMMON"))) 1856 decl_non_common; 1857 struct tree_parm_decl GTY ((tag ("TS_PARM_DECL"))) parm_decl; 1858 struct tree_decl_with_vis GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis; 1859 struct tree_var_decl GTY ((tag ("TS_VAR_DECL"))) var_decl; 1860 struct tree_field_decl GTY ((tag ("TS_FIELD_DECL"))) field_decl; 1861 struct tree_label_decl GTY ((tag ("TS_LABEL_DECL"))) label_decl; 1862 struct tree_result_decl GTY ((tag ("TS_RESULT_DECL"))) result_decl; 1863 struct tree_const_decl GTY ((tag ("TS_CONST_DECL"))) const_decl; 1864 struct tree_type_decl GTY ((tag ("TS_TYPE_DECL"))) type_decl; 1865 struct tree_function_decl GTY ((tag ("TS_FUNCTION_DECL"))) function_decl; 1866 struct tree_translation_unit_decl GTY ((tag ("TS_TRANSLATION_UNIT_DECL"))) 1867 translation_unit_decl; 1868 struct tree_type_common GTY ((tag ("TS_TYPE_COMMON"))) type_common; 1869 struct tree_type_with_lang_specific GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC"))) 1870 type_with_lang_specific; 1871 struct tree_type_non_common GTY ((tag ("TS_TYPE_NON_COMMON"))) 1872 type_non_common; 1873 struct tree_list GTY ((tag ("TS_LIST"))) list; 1874 struct tree_vec GTY ((tag ("TS_VEC"))) vec; 1875 struct tree_exp GTY ((tag ("TS_EXP"))) exp; 1876 struct tree_ssa_name GTY ((tag ("TS_SSA_NAME"))) ssa_name; 1877 struct tree_block GTY ((tag ("TS_BLOCK"))) block; 1878 struct tree_binfo GTY ((tag ("TS_BINFO"))) binfo; 1879 struct tree_statement_list GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list; 1880 struct tree_constructor GTY ((tag ("TS_CONSTRUCTOR"))) constructor; 1881 struct tree_omp_clause GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause; 1882 struct tree_optimization_option GTY ((tag ("TS_OPTIMIZATION"))) optimization; 1883 struct tree_target_option GTY ((tag ("TS_TARGET_OPTION"))) target_option; 1884 }; 1885 1886 /* Structure describing an attribute and a function to handle it. */ 1887 struct attribute_spec { 1888 /* The name of the attribute (without any leading or trailing __), 1889 or NULL to mark the end of a table of attributes. */ 1890 const char *name; 1891 /* The minimum length of the list of arguments of the attribute. */ 1892 int min_length; 1893 /* The maximum length of the list of arguments of the attribute 1894 (-1 for no maximum). */ 1895 int max_length; 1896 /* Whether this attribute requires a DECL. If it does, it will be passed 1897 from types of DECLs, function return types and array element types to 1898 the DECLs, function types and array types respectively; but when 1899 applied to a type in any other circumstances, it will be ignored with 1900 a warning. (If greater control is desired for a given attribute, 1901 this should be false, and the flags argument to the handler may be 1902 used to gain greater control in that case.) */ 1903 bool decl_required; 1904 /* Whether this attribute requires a type. If it does, it will be passed 1905 from a DECL to the type of that DECL. */ 1906 bool type_required; 1907 /* Whether this attribute requires a function (or method) type. If it does, 1908 it will be passed from a function pointer type to the target type, 1909 and from a function return type (which is not itself a function 1910 pointer type) to the function type. */ 1911 bool function_type_required; 1912 /* Function to handle this attribute. NODE points to the node to which 1913 the attribute is to be applied. If a DECL, it should be modified in 1914 place; if a TYPE, a copy should be created. NAME is the name of the 1915 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST 1916 of the arguments (which may be NULL). FLAGS gives further information 1917 about the context of the attribute. Afterwards, the attributes will 1918 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate, 1919 unless *NO_ADD_ATTRS is set to true (which should be done on error, 1920 as well as in any other cases when the attributes should not be added 1921 to the DECL or TYPE). Depending on FLAGS, any attributes to be 1922 applied to another type or DECL later may be returned; 1923 otherwise the return value should be NULL_TREE. This pointer may be 1924 NULL if no special handling is required beyond the checks implied 1925 by the rest of this structure. */ 1926 tree (*handler) (tree *node, tree name, tree args, 1927 int flags, bool *no_add_attrs); 1928 /* Specifies if attribute affects type's identity. */ 1929 bool affects_type_identity; 1930 }; 1931 1932 /* These functions allow a front-end to perform a manual layout of a 1933 RECORD_TYPE. (For instance, if the placement of subsequent fields 1934 depends on the placement of fields so far.) Begin by calling 1935 start_record_layout. Then, call place_field for each of the 1936 fields. Then, call finish_record_layout. See layout_type for the 1937 default way in which these functions are used. */ 1938 typedef struct record_layout_info_s { 1939 /* The RECORD_TYPE that we are laying out. */ 1940 tree t; 1941 /* The offset into the record so far, in bytes, not including bits in 1942 BITPOS. */ 1943 tree offset; 1944 /* The last known alignment of SIZE. */ 1945 unsigned int offset_align; 1946 /* The bit position within the last OFFSET_ALIGN bits, in bits. */ 1947 tree bitpos; 1948 /* The alignment of the record so far, in bits. */ 1949 unsigned int record_align; 1950 /* The alignment of the record so far, ignoring #pragma pack and 1951 __attribute__ ((packed)), in bits. */ 1952 unsigned int unpacked_align; 1953 /* The previous field laid out. */ 1954 tree prev_field; 1955 /* The static variables (i.e., class variables, as opposed to 1956 instance variables) encountered in T. */ 1957 vec<tree, va_gc> *pending_statics; 1958 /* Bits remaining in the current alignment group */ 1959 int remaining_in_alignment; 1960 /* True if we've seen a packed field that didn't have normal 1961 alignment anyway. */ 1962 int packed_maybe_necessary; 1963 } *record_layout_info; 1964 1965 /* Iterator for going through the function arguments. */ 1966 struct function_args_iterator { 1967 tree next; /* TREE_LIST pointing to the next argument */ 1968 }; 1969 1970 /* Structures to map from a tree to another tree. */ 1971 struct GTY(()) tree_map_base { 1972 tree from; 1973 }; 1974 1975 /* Map from a tree to another tree. */ 1976 1977 struct GTY((for_user)) tree_map { 1978 struct tree_map_base base; 1979 unsigned int hash; 1980 tree to; 1981 }; 1982 1983 /* Map from a decl tree to another tree. */ 1984 struct GTY((for_user)) tree_decl_map { 1985 struct tree_map_base base; 1986 tree to; 1987 }; 1988 1989 /* Map from a tree to an int. */ 1990 struct GTY((for_user)) tree_int_map { 1991 struct tree_map_base base; 1992 unsigned int to; 1993 }; 1994 1995 /* Map from a decl tree to a tree vector. */ 1996 struct GTY((for_user)) tree_vec_map { 1997 struct tree_map_base base; 1998 vec<tree, va_gc> *to; 1999 }; 2000 2001 /* Abstract iterators for CALL_EXPRs. These static inline definitions 2002 have to go towards the end of tree.h so that union tree_node is fully 2003 defined by this point. */ 2004 2005 /* Structure containing iterator state. */ 2006 struct call_expr_arg_iterator { 2007 tree t; /* the call_expr */ 2008 int n; /* argument count */ 2009 int i; /* next argument index */ 2010 }; 2011 2012 struct const_call_expr_arg_iterator { 2013 const_tree t; /* the call_expr */ 2014 int n; /* argument count */ 2015 int i; /* next argument index */ 2016 }; 2017 2018 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin 2019 function, and flags. */ 2020 struct GTY(()) builtin_info_type { 2021 tree decl; 2022 /* Whether the user can use <xxx> instead of explicitly using calls 2023 to __builtin_<xxx>. */ 2024 unsigned implicit_p : 1; 2025 /* Whether the user has provided a declaration of <xxx>. */ 2026 unsigned declared_p : 1; 2027 }; 2028 2029 /* Information about a _FloatN or _FloatNx type that may be 2030 supported. */ 2031 struct floatn_type_info { 2032 /* The number N in the type name. */ 2033 int n; 2034 /* Whether it is an extended type _FloatNx (true) or an interchange 2035 type (false). */ 2036 bool extended; 2037 }; 2038 2039 2040 /*--------------------------------------------------------------------------- 2041 Global variables 2042 ---------------------------------------------------------------------------*/ 2043 /* Matrix describing the structures contained in a given tree code. */ 2044 extern unsigned char tree_contains_struct[MAX_TREE_CODES][64]; 2045 2046 /* Class of tree given its code. */ 2047 extern const enum tree_code_class tree_code_type[]; 2048 2049 /* Each tree code class has an associated string representation. 2050 These must correspond to the tree_code_class entries. */ 2051 extern const char *const tree_code_class_strings[]; 2052 2053 /* Number of argument-words in each kind of tree-node. */ 2054 extern const unsigned char tree_code_length[]; 2055 2056 /* Vector of all alias pairs for global symbols. */ 2057 extern GTY(()) vec<alias_pair, va_gc> *alias_pairs; 2058 2059 /* Names of all the built_in classes. */ 2060 extern const char *const built_in_class_names[BUILT_IN_LAST]; 2061 2062 /* Names of all the built_in functions. */ 2063 extern const char * built_in_names[(int) END_BUILTINS]; 2064 2065 /* Number of operands and names for each OMP_CLAUSE node. */ 2066 extern unsigned const char omp_clause_num_ops[]; 2067 extern const char * const omp_clause_code_name[]; 2068 2069 /* A vector of all translation-units. */ 2070 extern GTY (()) vec<tree, va_gc> *all_translation_units; 2071 2072 /* Vector of standard trees used by the C compiler. */ 2073 extern GTY(()) tree global_trees[TI_MAX]; 2074 2075 /* The standard C integer types. Use integer_type_kind to index into 2076 this array. */ 2077 extern GTY(()) tree integer_types[itk_none]; 2078 2079 /* Types used to represent sizes. */ 2080 extern GTY(()) tree sizetype_tab[(int) stk_type_kind_last]; 2081 2082 /* Arrays for keeping track of tree node statistics. */ 2083 extern int tree_node_counts[]; 2084 extern int tree_node_sizes[]; 2085 2086 /* True if we are in gimple form and the actions of the folders need to 2087 be restricted. False if we are not in gimple form and folding is not 2088 restricted to creating gimple expressions. */ 2089 extern bool in_gimple_form; 2090 2091 /* Functional interface to the builtin functions. */ 2092 extern GTY(()) builtin_info_type builtin_info[(int)END_BUILTINS]; 2093 2094 /* If nonzero, an upper limit on alignment of structure fields, in bits, */ 2095 extern unsigned int maximum_field_alignment; 2096 2097 /* Points to the FUNCTION_DECL of the function whose body we are reading. */ 2098 extern GTY(()) tree current_function_decl; 2099 2100 /* Nonzero means a FUNC_BEGIN label was emitted. */ 2101 extern GTY(()) const char * current_function_func_begin_label; 2102 2103 /* Information about the _FloatN and _FloatNx types. */ 2104 extern const floatn_type_info floatn_nx_types[NUM_FLOATN_NX_TYPES]; 2105 2106 #endif // GCC_TREE_CORE_H 2107