1/* Core data structures for the 'tree' type. 2 Copyright (C) 1989-2015 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/* This file contains all the data structures that define the 'tree' type. 24 There are no accessor macros nor functions in this file. Only the 25 basic data structures, extern declarations and type definitions. */ 26 27/*--------------------------------------------------------------------------- 28 Forward type declarations. Mostly to avoid including unnecessary headers 29---------------------------------------------------------------------------*/ 30struct function; 31struct real_value; 32struct fixed_value; 33struct ptr_info_def; 34struct range_info_def; 35struct die_struct; 36 37 38/*--------------------------------------------------------------------------- 39 #defined constants 40---------------------------------------------------------------------------*/ 41/* Nonzero if this is a call to a function whose return value depends 42 solely on its arguments, has no side effects, and does not read 43 global memory. This corresponds to TREE_READONLY for function 44 decls. */ 45#define ECF_CONST (1 << 0) 46 47/* Nonzero if this is a call to "pure" function (like const function, 48 but may read memory. This corresponds to DECL_PURE_P for function 49 decls. */ 50#define ECF_PURE (1 << 1) 51 52/* Nonzero if this is ECF_CONST or ECF_PURE but cannot be proven to no 53 infinite loop. This corresponds to DECL_LOOPING_CONST_OR_PURE_P 54 for function decls.*/ 55#define ECF_LOOPING_CONST_OR_PURE (1 << 2) 56 57/* Nonzero if this call will never return. */ 58#define ECF_NORETURN (1 << 3) 59 60/* Nonzero if this is a call to malloc or a related function. */ 61#define ECF_MALLOC (1 << 4) 62 63/* Nonzero if it is plausible that this is a call to alloca. */ 64#define ECF_MAY_BE_ALLOCA (1 << 5) 65 66/* Nonzero if this is a call to a function that won't throw an exception. */ 67#define ECF_NOTHROW (1 << 6) 68 69/* Nonzero if this is a call to setjmp or a related function. */ 70#define ECF_RETURNS_TWICE (1 << 7) 71 72/* Nonzero if this call replaces the current stack frame. */ 73#define ECF_SIBCALL (1 << 8) 74 75/* Function does not read or write memory (but may have side effects, so 76 it does not necessarily fit ECF_CONST). */ 77#define ECF_NOVOPS (1 << 9) 78 79/* The function does not lead to calls within current function unit. */ 80#define ECF_LEAF (1 << 10) 81 82/* Nonzero if this call does not affect transactions. */ 83#define ECF_TM_PURE (1 << 11) 84 85/* Nonzero if this call is into the transaction runtime library. */ 86#define ECF_TM_BUILTIN (1 << 12) 87 88/* Call argument flags. */ 89/* Nonzero if the argument is not dereferenced recursively, thus only 90 directly reachable memory is read or written. */ 91#define EAF_DIRECT (1 << 0) 92 93/* Nonzero if memory reached by the argument is not clobbered. */ 94#define EAF_NOCLOBBER (1 << 1) 95 96/* Nonzero if the argument does not escape. */ 97#define EAF_NOESCAPE (1 << 2) 98 99/* Nonzero if the argument is not used by the function. */ 100#define EAF_UNUSED (1 << 3) 101 102/* Call return flags. */ 103/* Mask for the argument number that is returned. Lower two bits of 104 the return flags, encodes argument slots zero to three. */ 105#define ERF_RETURN_ARG_MASK (3) 106 107/* Nonzero if the return value is equal to the argument number 108 flags & ERF_RETURN_ARG_MASK. */ 109#define ERF_RETURNS_ARG (1 << 2) 110 111/* Nonzero if the return value does not alias with anything. Functions 112 with the malloc attribute have this set on their return value. */ 113#define ERF_NOALIAS (1 << 3) 114 115 116/*--------------------------------------------------------------------------- 117 Enumerations 118---------------------------------------------------------------------------*/ 119/* Codes of tree nodes. */ 120#define DEFTREECODE(SYM, STRING, TYPE, NARGS) SYM, 121#define END_OF_BASE_TREE_CODES LAST_AND_UNUSED_TREE_CODE, 122 123enum tree_code { 124#include "all-tree.def" 125MAX_TREE_CODES 126}; 127 128#undef DEFTREECODE 129#undef END_OF_BASE_TREE_CODES 130 131/* Number of language-independent tree codes. */ 132#define NUM_TREE_CODES \ 133 ((int) LAST_AND_UNUSED_TREE_CODE) 134 135#define CODE_CONTAINS_STRUCT(CODE, STRUCT) \ 136 (tree_contains_struct[(CODE)][(STRUCT)]) 137 138 139/* Classify which part of the compiler has defined a given builtin function. 140 Note that we assume below that this is no more than two bits. */ 141enum built_in_class { 142 NOT_BUILT_IN = 0, 143 BUILT_IN_FRONTEND, 144 BUILT_IN_MD, 145 BUILT_IN_NORMAL 146}; 147 148/* Last marker used for LTO stremaing of built_in_class. We can not add it 149 to the enum since we need the enumb to fit in 2 bits. */ 150#define BUILT_IN_LAST (BUILT_IN_NORMAL + 1) 151 152/* Codes that identify the various built in functions 153 so that expand_call can identify them quickly. */ 154#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM, 155enum built_in_function { 156#include "builtins.def" 157 158 BEGIN_CHKP_BUILTINS, 159 160#undef DEF_BUILTIN 161#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) 162#undef DEF_BUILTIN_CHKP 163#define DEF_BUILTIN_CHKP(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \ 164 ENUM##_CHKP = ENUM + BEGIN_CHKP_BUILTINS + 1, 165#include "builtins.def" 166#undef DEF_BUILTIN_CHKP 167 168 END_CHKP_BUILTINS = BEGIN_CHKP_BUILTINS * 2 + 1, 169 170 /* Complex division routines in libgcc. These are done via builtins 171 because emit_library_call_value can't handle complex values. */ 172 BUILT_IN_COMPLEX_MUL_MIN, 173 BUILT_IN_COMPLEX_MUL_MAX 174 = BUILT_IN_COMPLEX_MUL_MIN 175 + MAX_MODE_COMPLEX_FLOAT 176 - MIN_MODE_COMPLEX_FLOAT, 177 178 BUILT_IN_COMPLEX_DIV_MIN, 179 BUILT_IN_COMPLEX_DIV_MAX 180 = BUILT_IN_COMPLEX_DIV_MIN 181 + MAX_MODE_COMPLEX_FLOAT 182 - MIN_MODE_COMPLEX_FLOAT, 183 184 /* Upper bound on non-language-specific builtins. */ 185 END_BUILTINS 186}; 187#undef DEF_BUILTIN 188 189/* Tree code classes. Each tree_code has an associated code class 190 represented by a TREE_CODE_CLASS. */ 191enum tree_code_class { 192 tcc_exceptional, /* An exceptional code (fits no category). */ 193 tcc_constant, /* A constant. */ 194 /* Order of tcc_type and tcc_declaration is important. */ 195 tcc_type, /* A type object code. */ 196 tcc_declaration, /* A declaration (also serving as variable refs). */ 197 tcc_reference, /* A reference to storage. */ 198 tcc_comparison, /* A comparison expression. */ 199 tcc_unary, /* A unary arithmetic expression. */ 200 tcc_binary, /* A binary arithmetic expression. */ 201 tcc_statement, /* A statement expression, which have side effects 202 but usually no interesting value. */ 203 tcc_vl_exp, /* A function call or other expression with a 204 variable-length operand vector. */ 205 tcc_expression /* Any other expression. */ 206}; 207 208/* OMP_CLAUSE codes. Do not reorder, as this is used to index into 209 the tables omp_clause_num_ops and omp_clause_code_name. */ 210enum omp_clause_code { 211 /* Clause zero is special-cased inside the parser 212 (c_parser_omp_variable_list). */ 213 OMP_CLAUSE_ERROR = 0, 214 215 /* OpenACC/OpenMP clause: private (variable_list). */ 216 OMP_CLAUSE_PRIVATE, 217 218 /* OpenMP clause: shared (variable_list). */ 219 OMP_CLAUSE_SHARED, 220 221 /* OpenACC/OpenMP clause: firstprivate (variable_list). */ 222 OMP_CLAUSE_FIRSTPRIVATE, 223 224 /* OpenMP clause: lastprivate (variable_list). */ 225 OMP_CLAUSE_LASTPRIVATE, 226 227 /* OpenACC/OpenMP clause: reduction (operator:variable_list). 228 OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator. 229 Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var. 230 Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var 231 into the shared one. 232 Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL 233 placeholder used in OMP_CLAUSE_REDUCTION_{INIT,MERGE}. */ 234 OMP_CLAUSE_REDUCTION, 235 236 /* OpenMP clause: copyin (variable_list). */ 237 OMP_CLAUSE_COPYIN, 238 239 /* OpenMP clause: copyprivate (variable_list). */ 240 OMP_CLAUSE_COPYPRIVATE, 241 242 /* OpenMP clause: linear (variable-list[:linear-step]). */ 243 OMP_CLAUSE_LINEAR, 244 245 /* OpenMP clause: aligned (variable-list[:alignment]). */ 246 OMP_CLAUSE_ALIGNED, 247 248 /* OpenMP clause: depend ({in,out,inout}:variable-list). */ 249 OMP_CLAUSE_DEPEND, 250 251 /* OpenMP clause: uniform (argument-list). */ 252 OMP_CLAUSE_UNIFORM, 253 254 /* OpenMP clause: from (variable-list). */ 255 OMP_CLAUSE_FROM, 256 257 /* OpenMP clause: to (variable-list). */ 258 OMP_CLAUSE_TO, 259 260 /* OpenACC clauses: {copy, copyin, copyout, create, delete, deviceptr, 261 device, host (self), present, present_or_copy (pcopy), present_or_copyin 262 (pcopyin), present_or_copyout (pcopyout), present_or_create (pcreate)} 263 (variable-list). 264 265 OpenMP clause: map ({alloc:,to:,from:,tofrom:,}variable-list). */ 266 OMP_CLAUSE_MAP, 267 268 /* Internal structure to hold OpenACC cache directive's variable-list. 269 #pragma acc cache (variable-list). */ 270 OMP_CLAUSE__CACHE_, 271 272 /* OpenACC clause: device_resident (variable_list). */ 273 OMP_CLAUSE_DEVICE_RESIDENT, 274 275 /* OpenACC clause: use_device (variable_list). */ 276 OMP_CLAUSE_USE_DEVICE, 277 278 /* OpenACC clause: gang [(gang-argument-list)]. 279 Where 280 gang-argument-list: [gang-argument-list, ] gang-argument 281 gang-argument: [num:] integer-expression 282 | static: size-expression 283 size-expression: * | integer-expression. */ 284 OMP_CLAUSE_GANG, 285 286 /* OpenACC clause: async [(integer-expression)]. */ 287 OMP_CLAUSE_ASYNC, 288 289 /* OpenACC clause: wait [(integer-expression-list)]. */ 290 OMP_CLAUSE_WAIT, 291 292 /* OpenACC clause: auto. */ 293 OMP_CLAUSE_AUTO, 294 295 /* OpenACC clause: seq. */ 296 OMP_CLAUSE_SEQ, 297 298 /* Internal clause: temporary for combined loops expansion. */ 299 OMP_CLAUSE__LOOPTEMP_, 300 301 /* OpenACC/OpenMP clause: if (scalar-expression). */ 302 OMP_CLAUSE_IF, 303 304 /* OpenMP clause: num_threads (integer-expression). */ 305 OMP_CLAUSE_NUM_THREADS, 306 307 /* OpenMP clause: schedule. */ 308 OMP_CLAUSE_SCHEDULE, 309 310 /* OpenMP clause: nowait. */ 311 OMP_CLAUSE_NOWAIT, 312 313 /* OpenMP clause: ordered. */ 314 OMP_CLAUSE_ORDERED, 315 316 /* OpenMP clause: default. */ 317 OMP_CLAUSE_DEFAULT, 318 319 /* OpenACC/OpenMP clause: collapse (constant-integer-expression). */ 320 OMP_CLAUSE_COLLAPSE, 321 322 /* OpenMP clause: untied. */ 323 OMP_CLAUSE_UNTIED, 324 325 /* OpenMP clause: final (scalar-expression). */ 326 OMP_CLAUSE_FINAL, 327 328 /* OpenMP clause: mergeable. */ 329 OMP_CLAUSE_MERGEABLE, 330 331 /* OpenMP clause: device (integer-expression). */ 332 OMP_CLAUSE_DEVICE, 333 334 /* OpenMP clause: dist_schedule (static[:chunk-size]). */ 335 OMP_CLAUSE_DIST_SCHEDULE, 336 337 /* OpenMP clause: inbranch. */ 338 OMP_CLAUSE_INBRANCH, 339 340 /* OpenMP clause: notinbranch. */ 341 OMP_CLAUSE_NOTINBRANCH, 342 343 /* OpenMP clause: num_teams(integer-expression). */ 344 OMP_CLAUSE_NUM_TEAMS, 345 346 /* OpenMP clause: thread_limit(integer-expression). */ 347 OMP_CLAUSE_THREAD_LIMIT, 348 349 /* OpenMP clause: proc_bind ({master,close,spread}). */ 350 OMP_CLAUSE_PROC_BIND, 351 352 /* OpenMP clause: safelen (constant-integer-expression). */ 353 OMP_CLAUSE_SAFELEN, 354 355 /* OpenMP clause: simdlen (constant-integer-expression). */ 356 OMP_CLAUSE_SIMDLEN, 357 358 /* OpenMP clause: for. */ 359 OMP_CLAUSE_FOR, 360 361 /* OpenMP clause: parallel. */ 362 OMP_CLAUSE_PARALLEL, 363 364 /* OpenMP clause: sections. */ 365 OMP_CLAUSE_SECTIONS, 366 367 /* OpenMP clause: taskgroup. */ 368 OMP_CLAUSE_TASKGROUP, 369 370 /* Internally used only clause, holding SIMD uid. */ 371 OMP_CLAUSE__SIMDUID_, 372 373 /* Internally used only clause, holding _Cilk_for # of iterations 374 on OMP_PARALLEL. */ 375 OMP_CLAUSE__CILK_FOR_COUNT_, 376 377 /* OpenACC clause: independent. */ 378 OMP_CLAUSE_INDEPENDENT, 379 380 /* OpenACC clause: worker [( [num:] integer-expression)]. */ 381 OMP_CLAUSE_WORKER, 382 383 /* OpenACC clause: vector [( [length:] integer-expression)]. */ 384 OMP_CLAUSE_VECTOR, 385 386 /* OpenACC clause: num_gangs (integer-expression). */ 387 OMP_CLAUSE_NUM_GANGS, 388 389 /* OpenACC clause: num_workers (integer-expression). */ 390 OMP_CLAUSE_NUM_WORKERS, 391 392 /* OpenACC clause: vector_length (integer-expression). */ 393 OMP_CLAUSE_VECTOR_LENGTH 394}; 395 396#undef DEFTREESTRUCT 397#define DEFTREESTRUCT(ENUM, NAME) ENUM, 398enum tree_node_structure_enum { 399#include "treestruct.def" 400 LAST_TS_ENUM 401}; 402#undef DEFTREESTRUCT 403 404enum omp_clause_schedule_kind { 405 OMP_CLAUSE_SCHEDULE_STATIC, 406 OMP_CLAUSE_SCHEDULE_DYNAMIC, 407 OMP_CLAUSE_SCHEDULE_GUIDED, 408 OMP_CLAUSE_SCHEDULE_AUTO, 409 OMP_CLAUSE_SCHEDULE_RUNTIME, 410 OMP_CLAUSE_SCHEDULE_CILKFOR, 411 OMP_CLAUSE_SCHEDULE_LAST 412}; 413 414enum omp_clause_default_kind { 415 OMP_CLAUSE_DEFAULT_UNSPECIFIED, 416 OMP_CLAUSE_DEFAULT_SHARED, 417 OMP_CLAUSE_DEFAULT_NONE, 418 OMP_CLAUSE_DEFAULT_PRIVATE, 419 OMP_CLAUSE_DEFAULT_FIRSTPRIVATE, 420 OMP_CLAUSE_DEFAULT_LAST 421}; 422 423/* There is a TYPE_QUAL value for each type qualifier. They can be 424 combined by bitwise-or to form the complete set of qualifiers for a 425 type. */ 426enum cv_qualifier { 427 TYPE_UNQUALIFIED = 0x0, 428 TYPE_QUAL_CONST = 0x1, 429 TYPE_QUAL_VOLATILE = 0x2, 430 TYPE_QUAL_RESTRICT = 0x4, 431 TYPE_QUAL_ATOMIC = 0x8 432}; 433 434/* Enumerate visibility settings. */ 435#ifndef SYMBOL_VISIBILITY_DEFINED 436#define SYMBOL_VISIBILITY_DEFINED 437enum symbol_visibility { 438 VISIBILITY_DEFAULT, 439 VISIBILITY_PROTECTED, 440 VISIBILITY_HIDDEN, 441 VISIBILITY_INTERNAL 442}; 443#endif // SYMBOL_VISIBILITY_DEFINED 444 445/* Standard named or nameless data types of the C compiler. */ 446enum tree_index { 447 TI_ERROR_MARK, 448 TI_INTQI_TYPE, 449 TI_INTHI_TYPE, 450 TI_INTSI_TYPE, 451 TI_INTDI_TYPE, 452 TI_INTTI_TYPE, 453 454 TI_UINTQI_TYPE, 455 TI_UINTHI_TYPE, 456 TI_UINTSI_TYPE, 457 TI_UINTDI_TYPE, 458 TI_UINTTI_TYPE, 459 460 TI_ATOMICQI_TYPE, 461 TI_ATOMICHI_TYPE, 462 TI_ATOMICSI_TYPE, 463 TI_ATOMICDI_TYPE, 464 TI_ATOMICTI_TYPE, 465 466 TI_UINT16_TYPE, 467 TI_UINT32_TYPE, 468 TI_UINT64_TYPE, 469 470 TI_VOID, 471 472 TI_INTEGER_ZERO, 473 TI_INTEGER_ONE, 474 TI_INTEGER_THREE, 475 TI_INTEGER_MINUS_ONE, 476 TI_NULL_POINTER, 477 478 TI_SIZE_ZERO, 479 TI_SIZE_ONE, 480 481 TI_BITSIZE_ZERO, 482 TI_BITSIZE_ONE, 483 TI_BITSIZE_UNIT, 484 485 TI_PUBLIC, 486 TI_PROTECTED, 487 TI_PRIVATE, 488 489 TI_BOOLEAN_FALSE, 490 TI_BOOLEAN_TRUE, 491 492 TI_COMPLEX_INTEGER_TYPE, 493 TI_COMPLEX_FLOAT_TYPE, 494 TI_COMPLEX_DOUBLE_TYPE, 495 TI_COMPLEX_LONG_DOUBLE_TYPE, 496 497 TI_FLOAT_TYPE, 498 TI_DOUBLE_TYPE, 499 TI_LONG_DOUBLE_TYPE, 500 501 TI_FLOAT_PTR_TYPE, 502 TI_DOUBLE_PTR_TYPE, 503 TI_LONG_DOUBLE_PTR_TYPE, 504 TI_INTEGER_PTR_TYPE, 505 506 TI_VOID_TYPE, 507 TI_PTR_TYPE, 508 TI_CONST_PTR_TYPE, 509 TI_SIZE_TYPE, 510 TI_PID_TYPE, 511 TI_PTRDIFF_TYPE, 512 TI_VA_LIST_TYPE, 513 TI_VA_LIST_GPR_COUNTER_FIELD, 514 TI_VA_LIST_FPR_COUNTER_FIELD, 515 TI_BOOLEAN_TYPE, 516 TI_FILEPTR_TYPE, 517 TI_POINTER_SIZED_TYPE, 518 519 TI_POINTER_BOUNDS_TYPE, 520 521 TI_DFLOAT32_TYPE, 522 TI_DFLOAT64_TYPE, 523 TI_DFLOAT128_TYPE, 524 TI_DFLOAT32_PTR_TYPE, 525 TI_DFLOAT64_PTR_TYPE, 526 TI_DFLOAT128_PTR_TYPE, 527 528 TI_VOID_LIST_NODE, 529 530 TI_MAIN_IDENTIFIER, 531 532 TI_SAT_SFRACT_TYPE, 533 TI_SAT_FRACT_TYPE, 534 TI_SAT_LFRACT_TYPE, 535 TI_SAT_LLFRACT_TYPE, 536 TI_SAT_USFRACT_TYPE, 537 TI_SAT_UFRACT_TYPE, 538 TI_SAT_ULFRACT_TYPE, 539 TI_SAT_ULLFRACT_TYPE, 540 TI_SFRACT_TYPE, 541 TI_FRACT_TYPE, 542 TI_LFRACT_TYPE, 543 TI_LLFRACT_TYPE, 544 TI_USFRACT_TYPE, 545 TI_UFRACT_TYPE, 546 TI_ULFRACT_TYPE, 547 TI_ULLFRACT_TYPE, 548 TI_SAT_SACCUM_TYPE, 549 TI_SAT_ACCUM_TYPE, 550 TI_SAT_LACCUM_TYPE, 551 TI_SAT_LLACCUM_TYPE, 552 TI_SAT_USACCUM_TYPE, 553 TI_SAT_UACCUM_TYPE, 554 TI_SAT_ULACCUM_TYPE, 555 TI_SAT_ULLACCUM_TYPE, 556 TI_SACCUM_TYPE, 557 TI_ACCUM_TYPE, 558 TI_LACCUM_TYPE, 559 TI_LLACCUM_TYPE, 560 TI_USACCUM_TYPE, 561 TI_UACCUM_TYPE, 562 TI_ULACCUM_TYPE, 563 TI_ULLACCUM_TYPE, 564 TI_QQ_TYPE, 565 TI_HQ_TYPE, 566 TI_SQ_TYPE, 567 TI_DQ_TYPE, 568 TI_TQ_TYPE, 569 TI_UQQ_TYPE, 570 TI_UHQ_TYPE, 571 TI_USQ_TYPE, 572 TI_UDQ_TYPE, 573 TI_UTQ_TYPE, 574 TI_SAT_QQ_TYPE, 575 TI_SAT_HQ_TYPE, 576 TI_SAT_SQ_TYPE, 577 TI_SAT_DQ_TYPE, 578 TI_SAT_TQ_TYPE, 579 TI_SAT_UQQ_TYPE, 580 TI_SAT_UHQ_TYPE, 581 TI_SAT_USQ_TYPE, 582 TI_SAT_UDQ_TYPE, 583 TI_SAT_UTQ_TYPE, 584 TI_HA_TYPE, 585 TI_SA_TYPE, 586 TI_DA_TYPE, 587 TI_TA_TYPE, 588 TI_UHA_TYPE, 589 TI_USA_TYPE, 590 TI_UDA_TYPE, 591 TI_UTA_TYPE, 592 TI_SAT_HA_TYPE, 593 TI_SAT_SA_TYPE, 594 TI_SAT_DA_TYPE, 595 TI_SAT_TA_TYPE, 596 TI_SAT_UHA_TYPE, 597 TI_SAT_USA_TYPE, 598 TI_SAT_UDA_TYPE, 599 TI_SAT_UTA_TYPE, 600 601 TI_OPTIMIZATION_DEFAULT, 602 TI_OPTIMIZATION_CURRENT, 603 TI_TARGET_OPTION_DEFAULT, 604 TI_TARGET_OPTION_CURRENT, 605 TI_CURRENT_TARGET_PRAGMA, 606 TI_CURRENT_OPTIMIZE_PRAGMA, 607 608 TI_MAX 609}; 610 611/* An enumeration of the standard C integer types. These must be 612 ordered so that shorter types appear before longer ones, and so 613 that signed types appear before unsigned ones, for the correct 614 functioning of interpret_integer() in c-lex.c. */ 615enum integer_type_kind { 616 itk_char, 617 itk_signed_char, 618 itk_unsigned_char, 619 itk_short, 620 itk_unsigned_short, 621 itk_int, 622 itk_unsigned_int, 623 itk_long, 624 itk_unsigned_long, 625 itk_long_long, 626 itk_unsigned_long_long, 627 628 itk_intN_0, 629 itk_unsigned_intN_0, 630 itk_intN_1, 631 itk_unsigned_intN_1, 632 itk_intN_2, 633 itk_unsigned_intN_2, 634 itk_intN_3, 635 itk_unsigned_intN_3, 636 637 itk_none 638}; 639 640/* A pointer-to-function member type looks like: 641 642 struct { 643 __P __pfn; 644 ptrdiff_t __delta; 645 }; 646 647 If __pfn is NULL, it is a NULL pointer-to-member-function. 648 649 (Because the vtable is always the first thing in the object, we 650 don't need its offset.) If the function is virtual, then PFN is 651 one plus twice the index into the vtable; otherwise, it is just a 652 pointer to the function. 653 654 Unfortunately, using the lowest bit of PFN doesn't work in 655 architectures that don't impose alignment requirements on function 656 addresses, or that use the lowest bit to tell one ISA from another, 657 for example. For such architectures, we use the lowest bit of 658 DELTA instead of the lowest bit of the PFN, and DELTA will be 659 multiplied by 2. */ 660enum ptrmemfunc_vbit_where_t { 661 ptrmemfunc_vbit_in_pfn, 662 ptrmemfunc_vbit_in_delta 663}; 664 665/* Flags that may be passed in the third argument of decl_attributes, and 666 to handler functions for attributes. */ 667enum attribute_flags { 668 /* The type passed in is the type of a DECL, and any attributes that 669 should be passed in again to be applied to the DECL rather than the 670 type should be returned. */ 671 ATTR_FLAG_DECL_NEXT = 1, 672 /* The type passed in is a function return type, and any attributes that 673 should be passed in again to be applied to the function type rather 674 than the return type should be returned. */ 675 ATTR_FLAG_FUNCTION_NEXT = 2, 676 /* The type passed in is an array element type, and any attributes that 677 should be passed in again to be applied to the array type rather 678 than the element type should be returned. */ 679 ATTR_FLAG_ARRAY_NEXT = 4, 680 /* The type passed in is a structure, union or enumeration type being 681 created, and should be modified in place. */ 682 ATTR_FLAG_TYPE_IN_PLACE = 8, 683 /* The attributes are being applied by default to a library function whose 684 name indicates known behavior, and should be silently ignored if they 685 are not in fact compatible with the function type. */ 686 ATTR_FLAG_BUILT_IN = 16, 687 /* A given attribute has been parsed as a C++-11 attribute. */ 688 ATTR_FLAG_CXX11 = 32 689}; 690 691/* Types used to represent sizes. */ 692enum size_type_kind { 693 stk_sizetype, /* Normal representation of sizes in bytes. */ 694 stk_ssizetype, /* Signed representation of sizes in bytes. */ 695 stk_bitsizetype, /* Normal representation of sizes in bits. */ 696 stk_sbitsizetype, /* Signed representation of sizes in bits. */ 697 stk_type_kind_last 698}; 699 700enum operand_equal_flag { 701 OEP_ONLY_CONST = 1, 702 OEP_PURE_SAME = 2, 703 OEP_CONSTANT_ADDRESS_OF = 4, 704 OEP_ADDRESS_OF = 8 705}; 706 707/* Enum and arrays used for tree allocation stats. 708 Keep in sync with tree.c:tree_node_kind_names. */ 709enum tree_node_kind { 710 d_kind, 711 t_kind, 712 b_kind, 713 s_kind, 714 r_kind, 715 e_kind, 716 c_kind, 717 id_kind, 718 vec_kind, 719 binfo_kind, 720 ssa_name_kind, 721 constr_kind, 722 x_kind, 723 lang_decl, 724 lang_type, 725 omp_clause_kind, 726 all_kinds 727}; 728 729enum annot_expr_kind { 730 annot_expr_ivdep_kind, 731 annot_expr_no_vector_kind, 732 annot_expr_vector_kind, 733 annot_expr_kind_last 734}; 735 736/* Internal functions. */ 737enum internal_fn { 738#define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) IFN_##CODE, 739#include "internal-fn.def" 740#undef DEF_INTERNAL_FN 741 IFN_LAST 742}; 743 744/*--------------------------------------------------------------------------- 745 Type definitions 746---------------------------------------------------------------------------*/ 747/* When processing aliases at the symbol table level, we need the 748 declaration of target. For this reason we need to queue aliases and 749 process them after all declarations has been produced. */ 750struct GTY(()) alias_pair { 751 tree decl; 752 tree target; 753}; 754 755/* An initialization priority. */ 756typedef unsigned short priority_type; 757 758/* The type of a callback function for walking over tree structure. */ 759typedef tree (*walk_tree_fn) (tree *, int *, void *); 760 761/* The type of a callback function that represents a custom walk_tree. */ 762typedef tree (*walk_tree_lh) (tree *, int *, tree (*) (tree *, int *, void *), 763 void *, hash_set<tree> *); 764 765 766/*--------------------------------------------------------------------------- 767 Main data structures 768---------------------------------------------------------------------------*/ 769/* A tree node can represent a data type, a variable, an expression 770 or a statement. Each node has a TREE_CODE which says what kind of 771 thing it represents. Some common codes are: 772 INTEGER_TYPE -- represents a type of integers. 773 ARRAY_TYPE -- represents a type of pointer. 774 VAR_DECL -- represents a declared variable. 775 INTEGER_CST -- represents a constant integer value. 776 PLUS_EXPR -- represents a sum (an expression). 777 778 As for the contents of a tree node: there are some fields 779 that all nodes share. Each TREE_CODE has various special-purpose 780 fields as well. The fields of a node are never accessed directly, 781 always through accessor macros. */ 782 783/* Every kind of tree node starts with this structure, 784 so all nodes have these fields. 785 786 See the accessor macros, defined below, for documentation of the 787 fields, and the table below which connects the fields and the 788 accessor macros. */ 789 790struct GTY(()) tree_base { 791 ENUM_BITFIELD(tree_code) code : 16; 792 793 unsigned side_effects_flag : 1; 794 unsigned constant_flag : 1; 795 unsigned addressable_flag : 1; 796 unsigned volatile_flag : 1; 797 unsigned readonly_flag : 1; 798 unsigned asm_written_flag: 1; 799 unsigned nowarning_flag : 1; 800 unsigned visited : 1; 801 802 unsigned used_flag : 1; 803 unsigned nothrow_flag : 1; 804 unsigned static_flag : 1; 805 unsigned public_flag : 1; 806 unsigned private_flag : 1; 807 unsigned protected_flag : 1; 808 unsigned deprecated_flag : 1; 809 unsigned default_def_flag : 1; 810 811 union { 812 /* The bits in the following structure should only be used with 813 accessor macros that constrain inputs with tree checking. */ 814 struct { 815 unsigned lang_flag_0 : 1; 816 unsigned lang_flag_1 : 1; 817 unsigned lang_flag_2 : 1; 818 unsigned lang_flag_3 : 1; 819 unsigned lang_flag_4 : 1; 820 unsigned lang_flag_5 : 1; 821 unsigned lang_flag_6 : 1; 822 unsigned saturating_flag : 1; 823 824 unsigned unsigned_flag : 1; 825 unsigned packed_flag : 1; 826 unsigned user_align : 1; 827 unsigned nameless_flag : 1; 828 unsigned atomic_flag : 1; 829 unsigned spare0 : 3; 830 831 unsigned spare1 : 8; 832 833 /* This field is only used with TREE_TYPE nodes; the only reason it is 834 present in tree_base instead of tree_type is to save space. The size 835 of the field must be large enough to hold addr_space_t values. */ 836 unsigned address_space : 8; 837 } bits; 838 839 /* The following fields are present in tree_base to save space. The 840 nodes using them do not require any of the flags above and so can 841 make better use of the 4-byte sized word. */ 842 843 /* The number of HOST_WIDE_INTs in an INTEGER_CST. */ 844 struct { 845 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in 846 its native precision. */ 847 unsigned char unextended; 848 849 /* The number of HOST_WIDE_INTs if the INTEGER_CST is extended to 850 wider precisions based on its TYPE_SIGN. */ 851 unsigned char extended; 852 853 /* The number of HOST_WIDE_INTs if the INTEGER_CST is accessed in 854 offset_int precision, with smaller integers being extended 855 according to their TYPE_SIGN. This is equal to one of the two 856 fields above but is cached for speed. */ 857 unsigned char offset; 858 } int_length; 859 860 /* VEC length. This field is only used with TREE_VEC. */ 861 int length; 862 863 /* SSA version number. This field is only used with SSA_NAME. */ 864 unsigned int version; 865 866 /* Internal function code. */ 867 enum internal_fn ifn; 868 869 /* The following two fields are used for MEM_REF and TARGET_MEM_REF 870 expression trees and specify known data non-dependences. For 871 two memory references in a function they are known to not 872 alias if dependence_info.clique are equal and dependence_info.base 873 are distinct. */ 874 struct { 875 unsigned short clique; 876 unsigned short base; 877 } dependence_info; 878 } GTY((skip(""))) u; 879}; 880 881/* The following table lists the uses of each of the above flags and 882 for which types of nodes they are defined. 883 884 addressable_flag: 885 886 TREE_ADDRESSABLE in 887 VAR_DECL, PARM_DECL, RESULT_DECL, FUNCTION_DECL, LABEL_DECL 888 SSA_NAME 889 all types 890 CONSTRUCTOR, IDENTIFIER_NODE 891 STMT_EXPR 892 893 CALL_EXPR_TAILCALL in 894 CALL_EXPR 895 896 CASE_LOW_SEEN in 897 CASE_LABEL_EXPR 898 899 PREDICT_EXPR_OUTCOME in 900 PREDICT_EXPR 901 902 static_flag: 903 904 TREE_STATIC in 905 VAR_DECL, FUNCTION_DECL 906 CONSTRUCTOR 907 908 TREE_NO_TRAMPOLINE in 909 ADDR_EXPR 910 911 BINFO_VIRTUAL_P in 912 TREE_BINFO 913 914 TREE_SYMBOL_REFERENCED in 915 IDENTIFIER_NODE 916 917 CLEANUP_EH_ONLY in 918 TARGET_EXPR, WITH_CLEANUP_EXPR 919 920 TRY_CATCH_IS_CLEANUP in 921 TRY_CATCH_EXPR 922 923 ASM_INPUT_P in 924 ASM_EXPR 925 926 TYPE_REF_CAN_ALIAS_ALL in 927 POINTER_TYPE, REFERENCE_TYPE 928 929 CASE_HIGH_SEEN in 930 CASE_LABEL_EXPR 931 932 ENUM_IS_SCOPED in 933 ENUMERAL_TYPE 934 935 TRANSACTION_EXPR_OUTER in 936 TRANSACTION_EXPR 937 938 SSA_NAME_ANTI_RANGE_P in 939 SSA_NAME 940 941 public_flag: 942 943 TREE_OVERFLOW in 944 INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST 945 946 TREE_PUBLIC in 947 VAR_DECL, FUNCTION_DECL 948 IDENTIFIER_NODE 949 950 CONSTRUCTOR_NO_CLEARING in 951 CONSTRUCTOR 952 953 ASM_VOLATILE_P in 954 ASM_EXPR 955 956 CALL_EXPR_VA_ARG_PACK in 957 CALL_EXPR 958 959 TYPE_CACHED_VALUES_P in 960 all types 961 962 SAVE_EXPR_RESOLVED_P in 963 SAVE_EXPR 964 965 OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in 966 OMP_CLAUSE_LASTPRIVATE 967 968 OMP_CLAUSE_PRIVATE_DEBUG in 969 OMP_CLAUSE_PRIVATE 970 971 OMP_CLAUSE_LINEAR_NO_COPYIN in 972 OMP_CLAUSE_LINEAR 973 974 OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION in 975 OMP_CLAUSE_MAP 976 977 OMP_CLAUSE_REDUCTION_OMP_ORIG_REF in 978 OMP_CLAUSE_REDUCTION 979 980 TRANSACTION_EXPR_RELAXED in 981 TRANSACTION_EXPR 982 983 private_flag: 984 985 TREE_PRIVATE in 986 all decls 987 988 CALL_EXPR_RETURN_SLOT_OPT in 989 CALL_EXPR 990 991 OMP_SECTION_LAST in 992 OMP_SECTION 993 994 OMP_PARALLEL_COMBINED in 995 OMP_PARALLEL 996 997 OMP_ATOMIC_SEQ_CST in 998 OMP_ATOMIC* 999 1000 OMP_CLAUSE_PRIVATE_OUTER_REF in 1001 OMP_CLAUSE_PRIVATE 1002 1003 OMP_CLAUSE_LINEAR_NO_COPYOUT in 1004 OMP_CLAUSE_LINEAR 1005 1006 TYPE_REF_IS_RVALUE in 1007 REFERENCE_TYPE 1008 1009 ENUM_IS_OPAQUE in 1010 ENUMERAL_TYPE 1011 1012 protected_flag: 1013 1014 TREE_PROTECTED in 1015 BLOCK 1016 all decls 1017 1018 CALL_FROM_THUNK_P and 1019 CALL_ALLOCA_FOR_VAR_P in 1020 CALL_EXPR 1021 1022 OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in 1023 OMP_CLAUSE_LINEAR 1024 1025 side_effects_flag: 1026 1027 TREE_SIDE_EFFECTS in 1028 all expressions 1029 all decls 1030 all constants 1031 1032 FORCED_LABEL in 1033 LABEL_DECL 1034 1035 volatile_flag: 1036 1037 TREE_THIS_VOLATILE in 1038 all expressions 1039 all decls 1040 1041 TYPE_VOLATILE in 1042 all types 1043 1044 readonly_flag: 1045 1046 TREE_READONLY in 1047 all expressions 1048 all decls 1049 1050 TYPE_READONLY in 1051 all types 1052 1053 constant_flag: 1054 1055 TREE_CONSTANT in 1056 all expressions 1057 all decls 1058 all constants 1059 1060 TYPE_SIZES_GIMPLIFIED in 1061 all types 1062 1063 unsigned_flag: 1064 1065 TYPE_UNSIGNED in 1066 all types 1067 1068 DECL_UNSIGNED in 1069 all decls 1070 1071 asm_written_flag: 1072 1073 TREE_ASM_WRITTEN in 1074 VAR_DECL, FUNCTION_DECL, TYPE_DECL 1075 RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE 1076 BLOCK, STRING_CST 1077 1078 SSA_NAME_OCCURS_IN_ABNORMAL_PHI in 1079 SSA_NAME 1080 1081 used_flag: 1082 1083 TREE_USED in 1084 all expressions 1085 all decls 1086 IDENTIFIER_NODE 1087 1088 nothrow_flag: 1089 1090 TREE_NOTHROW in 1091 CALL_EXPR 1092 FUNCTION_DECL 1093 1094 TYPE_ALIGN_OK in 1095 all types 1096 1097 TREE_THIS_NOTRAP in 1098 INDIRECT_REF, MEM_REF, TARGET_MEM_REF, ARRAY_REF, ARRAY_RANGE_REF 1099 1100 SSA_NAME_IN_FREELIST in 1101 SSA_NAME 1102 1103 DECL_NONALIASED in 1104 VAR_DECL 1105 1106 deprecated_flag: 1107 1108 TREE_DEPRECATED in 1109 all decls 1110 all types 1111 1112 IDENTIFIER_TRANSPARENT_ALIAS in 1113 IDENTIFIER_NODE 1114 1115 visited: 1116 1117 TREE_VISITED in 1118 all trees (used liberally by many passes) 1119 1120 saturating_flag: 1121 1122 TYPE_SATURATING in 1123 all types 1124 1125 VAR_DECL_IS_VIRTUAL_OPERAND in 1126 VAR_DECL 1127 1128 nowarning_flag: 1129 1130 TREE_NO_WARNING in 1131 all expressions 1132 all decls 1133 1134 TYPE_ARTIFICIAL in 1135 all types 1136 1137 default_def_flag: 1138 1139 TYPE_VECTOR_OPAQUE in 1140 VECTOR_TYPE 1141 1142 SSA_NAME_IS_DEFAULT_DEF in 1143 SSA_NAME 1144 1145 DECL_NONLOCAL_FRAME in 1146 VAR_DECL 1147 1148 TYPE_FINAL_P in 1149 RECORD_TYPE, UNION_TYPE and QUAL_UNION_TYPE 1150*/ 1151 1152struct GTY(()) tree_typed { 1153 struct tree_base base; 1154 tree type; 1155}; 1156 1157struct GTY(()) tree_common { 1158 struct tree_typed typed; 1159 tree chain; 1160}; 1161 1162struct GTY(()) tree_int_cst { 1163 struct tree_typed typed; 1164 HOST_WIDE_INT val[1]; 1165}; 1166 1167 1168struct GTY(()) tree_real_cst { 1169 struct tree_typed typed; 1170 struct real_value * real_cst_ptr; 1171}; 1172 1173struct GTY(()) tree_fixed_cst { 1174 struct tree_typed typed; 1175 struct fixed_value * fixed_cst_ptr; 1176}; 1177 1178struct GTY(()) tree_string { 1179 struct tree_typed typed; 1180 int length; 1181 char str[1]; 1182}; 1183 1184struct GTY(()) tree_complex { 1185 struct tree_typed typed; 1186 tree real; 1187 tree imag; 1188}; 1189 1190struct GTY(()) tree_vector { 1191 struct tree_typed typed; 1192 tree GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts[1]; 1193}; 1194 1195struct GTY(()) tree_identifier { 1196 struct tree_common common; 1197 struct ht_identifier id; 1198}; 1199 1200struct GTY(()) tree_list { 1201 struct tree_common common; 1202 tree purpose; 1203 tree value; 1204}; 1205 1206struct GTY(()) tree_vec { 1207 struct tree_common common; 1208 tree GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a[1]; 1209}; 1210 1211/* A single element of a CONSTRUCTOR. VALUE holds the actual value of the 1212 element. INDEX can optionally design the position of VALUE: in arrays, 1213 it is the index where VALUE has to be placed; in structures, it is the 1214 FIELD_DECL of the member. */ 1215struct GTY(()) constructor_elt { 1216 tree index; 1217 tree value; 1218}; 1219 1220struct GTY(()) tree_constructor { 1221 struct tree_typed typed; 1222 vec<constructor_elt, va_gc> *elts; 1223}; 1224 1225enum omp_clause_depend_kind 1226{ 1227 OMP_CLAUSE_DEPEND_IN, 1228 OMP_CLAUSE_DEPEND_OUT, 1229 OMP_CLAUSE_DEPEND_INOUT, 1230 OMP_CLAUSE_DEPEND_LAST 1231}; 1232 1233enum omp_clause_proc_bind_kind 1234{ 1235 /* Numbers should match omp_proc_bind_t enum in omp.h. */ 1236 OMP_CLAUSE_PROC_BIND_FALSE = 0, 1237 OMP_CLAUSE_PROC_BIND_TRUE = 1, 1238 OMP_CLAUSE_PROC_BIND_MASTER = 2, 1239 OMP_CLAUSE_PROC_BIND_CLOSE = 3, 1240 OMP_CLAUSE_PROC_BIND_SPREAD = 4, 1241 OMP_CLAUSE_PROC_BIND_LAST 1242}; 1243 1244struct GTY(()) tree_exp { 1245 struct tree_typed typed; 1246 location_t locus; 1247 tree GTY ((special ("tree_exp"), 1248 desc ("TREE_CODE ((tree) &%0)"))) 1249 operands[1]; 1250}; 1251 1252/* Immediate use linking structure. This structure is used for maintaining 1253 a doubly linked list of uses of an SSA_NAME. */ 1254struct GTY(()) ssa_use_operand_t { 1255 struct ssa_use_operand_t* GTY((skip(""))) prev; 1256 struct ssa_use_operand_t* GTY((skip(""))) next; 1257 /* Immediate uses for a given SSA name are maintained as a cyclic 1258 list. To recognize the root of this list, the location field 1259 needs to point to the original SSA name. Since statements and 1260 SSA names are of different data types, we need this union. See 1261 the explanation in struct imm_use_iterator. */ 1262 union { gimple stmt; tree ssa_name; } GTY((skip(""))) loc; 1263 tree *GTY((skip(""))) use; 1264}; 1265 1266struct GTY(()) tree_ssa_name { 1267 struct tree_typed typed; 1268 1269 /* _DECL wrapped by this SSA name. */ 1270 tree var; 1271 1272 /* Statement that defines this SSA name. */ 1273 gimple def_stmt; 1274 1275 /* Value range information. */ 1276 union ssa_name_info_type { 1277 /* Pointer attributes used for alias analysis. */ 1278 struct GTY ((tag ("0"))) ptr_info_def *ptr_info; 1279 /* Value range attributes used for zero/sign extension elimination. */ 1280 struct GTY ((tag ("1"))) range_info_def *range_info; 1281 } GTY ((desc ("%1.typed.type ?" \ 1282 "!POINTER_TYPE_P (TREE_TYPE ((tree)&%1)) : 2"))) info; 1283 1284 /* Immediate uses list for this SSA_NAME. */ 1285 struct ssa_use_operand_t imm_uses; 1286}; 1287 1288struct GTY(()) phi_arg_d { 1289 /* imm_use MUST be the first element in struct because we do some 1290 pointer arithmetic with it. See phi_arg_index_from_use. */ 1291 struct ssa_use_operand_t imm_use; 1292 tree def; 1293 location_t locus; 1294}; 1295 1296struct GTY(()) tree_omp_clause { 1297 struct tree_common common; 1298 location_t locus; 1299 enum omp_clause_code code; 1300 union omp_clause_subcode { 1301 enum omp_clause_default_kind default_kind; 1302 enum omp_clause_schedule_kind schedule_kind; 1303 enum omp_clause_depend_kind depend_kind; 1304 /* See include/gomp-constants.h for enum gomp_map_kind's values. */ 1305 unsigned char map_kind; 1306 enum omp_clause_proc_bind_kind proc_bind_kind; 1307 enum tree_code reduction_code; 1308 } GTY ((skip)) subcode; 1309 1310 /* The gimplification of OMP_CLAUSE_REDUCTION_{INIT,MERGE} for omp-low's 1311 usage. */ 1312 gimple_seq gimple_reduction_init; 1313 gimple_seq gimple_reduction_merge; 1314 1315 tree GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]"))) 1316 ops[1]; 1317}; 1318 1319struct GTY(()) tree_block { 1320 struct tree_base base; 1321 tree chain; 1322 1323 unsigned abstract_flag : 1; 1324 unsigned block_num : 31; 1325 1326 location_t locus; 1327 location_t end_locus; 1328 1329 tree vars; 1330 vec<tree, va_gc> *nonlocalized_vars; 1331 1332 tree subblocks; 1333 tree supercontext; 1334 tree abstract_origin; 1335 tree fragment_origin; 1336 tree fragment_chain; 1337}; 1338 1339struct GTY(()) tree_type_common { 1340 struct tree_common common; 1341 tree size; 1342 tree size_unit; 1343 tree attributes; 1344 unsigned int uid; 1345 1346 unsigned int precision : 10; 1347 unsigned no_force_blk_flag : 1; 1348 unsigned needs_constructing_flag : 1; 1349 unsigned transparent_aggr_flag : 1; 1350 unsigned restrict_flag : 1; 1351 unsigned contains_placeholder_bits : 2; 1352 1353 ENUM_BITFIELD(machine_mode) mode : 8; 1354 1355 unsigned string_flag : 1; 1356 unsigned lang_flag_0 : 1; 1357 unsigned lang_flag_1 : 1; 1358 unsigned lang_flag_2 : 1; 1359 unsigned lang_flag_3 : 1; 1360 unsigned lang_flag_4 : 1; 1361 unsigned lang_flag_5 : 1; 1362 unsigned lang_flag_6 : 1; 1363 1364 unsigned int align; 1365 alias_set_type alias_set; 1366 tree pointer_to; 1367 tree reference_to; 1368 union tree_type_symtab { 1369 int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address; 1370 const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer; 1371 struct die_struct * GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die; 1372 } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab; 1373 tree canonical; 1374 tree next_variant; 1375 tree main_variant; 1376 tree context; 1377 tree name; 1378}; 1379 1380struct GTY(()) tree_type_with_lang_specific { 1381 struct tree_type_common common; 1382 /* Points to a structure whose details depend on the language in use. */ 1383 struct lang_type *lang_specific; 1384}; 1385 1386struct GTY(()) tree_type_non_common { 1387 struct tree_type_with_lang_specific with_lang_specific; 1388 tree values; 1389 tree minval; 1390 tree maxval; 1391 tree binfo; 1392}; 1393 1394struct GTY (()) tree_binfo { 1395 struct tree_common common; 1396 1397 tree offset; 1398 tree vtable; 1399 tree virtuals; 1400 tree vptr_field; 1401 vec<tree, va_gc> *base_accesses; 1402 tree inheritance; 1403 1404 tree vtt_subvtt; 1405 tree vtt_vptr; 1406 1407 vec<tree, va_gc> base_binfos; 1408}; 1409 1410struct GTY(()) tree_decl_minimal { 1411 struct tree_common common; 1412 location_t locus; 1413 unsigned int uid; 1414 tree name; 1415 tree context; 1416}; 1417 1418struct GTY(()) tree_decl_common { 1419 struct tree_decl_minimal common; 1420 tree size; 1421 1422 ENUM_BITFIELD(machine_mode) mode : 8; 1423 1424 unsigned nonlocal_flag : 1; 1425 unsigned virtual_flag : 1; 1426 unsigned ignored_flag : 1; 1427 unsigned abstract_flag : 1; 1428 unsigned artificial_flag : 1; 1429 unsigned preserve_flag: 1; 1430 unsigned debug_expr_is_from : 1; 1431 1432 unsigned lang_flag_0 : 1; 1433 unsigned lang_flag_1 : 1; 1434 unsigned lang_flag_2 : 1; 1435 unsigned lang_flag_3 : 1; 1436 unsigned lang_flag_4 : 1; 1437 unsigned lang_flag_5 : 1; 1438 unsigned lang_flag_6 : 1; 1439 unsigned lang_flag_7 : 1; 1440 unsigned lang_flag_8 : 1; 1441 1442 /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER. */ 1443 unsigned decl_flag_0 : 1; 1444 /* In FIELD_DECL, this is DECL_BIT_FIELD 1445 In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL. 1446 In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG. */ 1447 unsigned decl_flag_1 : 1; 1448 /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P 1449 In VAR_DECL, PARM_DECL and RESULT_DECL, this is 1450 DECL_HAS_VALUE_EXPR_P. */ 1451 unsigned decl_flag_2 : 1; 1452 /* 1 bit unused. */ 1453 unsigned decl_flag_3 : 1; 1454 /* Logically, these two would go in a theoretical base shared by var and 1455 parm decl. */ 1456 unsigned gimple_reg_flag : 1; 1457 /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE. */ 1458 unsigned decl_by_reference_flag : 1; 1459 /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P. */ 1460 unsigned decl_read_flag : 1; 1461 /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE. */ 1462 unsigned decl_nonshareable_flag : 1; 1463 1464 /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs. */ 1465 unsigned int off_align : 8; 1466 1467 /* 24 bits unused. */ 1468 1469 /* DECL_ALIGN. It should have the same size as TYPE_ALIGN. */ 1470 unsigned int align; 1471 1472 /* UID for points-to sets, stable over copying from inlining. */ 1473 unsigned int pt_uid; 1474 1475 tree size_unit; 1476 tree initial; 1477 tree attributes; 1478 tree abstract_origin; 1479 1480 /* Points to a structure whose details depend on the language in use. */ 1481 struct lang_decl *lang_specific; 1482}; 1483 1484struct GTY(()) tree_decl_with_rtl { 1485 struct tree_decl_common common; 1486 rtx rtl; 1487}; 1488 1489struct GTY(()) tree_field_decl { 1490 struct tree_decl_common common; 1491 1492 tree offset; 1493 tree bit_field_type; 1494 tree qualifier; 1495 tree bit_offset; 1496 tree fcontext; 1497}; 1498 1499struct GTY(()) tree_label_decl { 1500 struct tree_decl_with_rtl common; 1501 int label_decl_uid; 1502 int eh_landing_pad_nr; 1503}; 1504 1505struct GTY(()) tree_result_decl { 1506 struct tree_decl_with_rtl common; 1507}; 1508 1509struct GTY(()) tree_const_decl { 1510 struct tree_decl_common common; 1511}; 1512 1513struct GTY(()) tree_parm_decl { 1514 struct tree_decl_with_rtl common; 1515 rtx incoming_rtl; 1516}; 1517 1518struct GTY(()) tree_decl_with_vis { 1519 struct tree_decl_with_rtl common; 1520 tree assembler_name; 1521 struct symtab_node *symtab_node; 1522 1523 /* Belong to VAR_DECL exclusively. */ 1524 unsigned defer_output : 1; 1525 unsigned hard_register : 1; 1526 unsigned common_flag : 1; 1527 unsigned in_text_section : 1; 1528 unsigned in_constant_pool : 1; 1529 unsigned dllimport_flag : 1; 1530 /* Don't belong to VAR_DECL exclusively. */ 1531 unsigned weak_flag : 1; 1532 1533 unsigned seen_in_bind_expr : 1; 1534 unsigned comdat_flag : 1; 1535 /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL. */ 1536 ENUM_BITFIELD(symbol_visibility) visibility : 2; 1537 unsigned visibility_specified : 1; 1538 1539 /* Belong to FUNCTION_DECL exclusively. */ 1540 unsigned init_priority_p : 1; 1541 /* Used by C++ only. Might become a generic decl flag. */ 1542 unsigned shadowed_for_var_p : 1; 1543 /* Belong to FUNCTION_DECL exclusively. */ 1544 unsigned cxx_constructor : 1; 1545 /* Belong to FUNCTION_DECL exclusively. */ 1546 unsigned cxx_destructor : 1; 1547 /* Belong to FUNCTION_DECL exclusively. */ 1548 unsigned final : 1; 1549 /* Belong to FUNCTION_DECL exclusively. */ 1550 unsigned regdecl_flag : 1; 1551 /* 14 unused bits. */ 1552}; 1553 1554struct GTY(()) tree_var_decl { 1555 struct tree_decl_with_vis common; 1556}; 1557 1558struct GTY(()) tree_decl_non_common { 1559 struct tree_decl_with_vis common; 1560 /* Almost all FE's use this. */ 1561 tree result; 1562}; 1563 1564/* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the 1565 arguments/result/saved_tree fields by front ends. It was either inherit 1566 FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL, 1567 which seemed a bit strange. */ 1568 1569struct GTY(()) tree_function_decl { 1570 struct tree_decl_non_common common; 1571 1572 struct function *f; 1573 1574 /* Arguments of the function. */ 1575 tree arguments; 1576 /* The personality function. Used for stack unwinding. */ 1577 tree personality; 1578 1579 /* Function specific options that are used by this function. */ 1580 tree function_specific_target; /* target options */ 1581 tree function_specific_optimization; /* optimization options */ 1582 1583 /* Generic function body. */ 1584 tree saved_tree; 1585 /* Index within a virtual table. */ 1586 tree vindex; 1587 1588 /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is 1589 DECL_FUNCTION_CODE. Otherwise unused. 1590 ??? The bitfield needs to be able to hold all target function 1591 codes as well. */ 1592 ENUM_BITFIELD(built_in_function) function_code : 12; 1593 ENUM_BITFIELD(built_in_class) built_in_class : 2; 1594 1595 unsigned static_ctor_flag : 1; 1596 unsigned static_dtor_flag : 1; 1597 1598 unsigned uninlinable : 1; 1599 unsigned possibly_inlined : 1; 1600 unsigned novops_flag : 1; 1601 unsigned returns_twice_flag : 1; 1602 unsigned malloc_flag : 1; 1603 unsigned operator_new_flag : 1; 1604 unsigned declared_inline_flag : 1; 1605 unsigned no_inline_warning_flag : 1; 1606 1607 unsigned no_instrument_function_entry_exit : 1; 1608 unsigned no_limit_stack : 1; 1609 unsigned disregard_inline_limits : 1; 1610 unsigned pure_flag : 1; 1611 unsigned looping_const_or_pure_flag : 1; 1612 unsigned has_debug_args_flag : 1; 1613 unsigned tm_clone_flag : 1; 1614 unsigned versioned_function : 1; 1615 /* No bits left. */ 1616}; 1617 1618struct GTY(()) tree_translation_unit_decl { 1619 struct tree_decl_common common; 1620 /* Source language of this translation unit. Used for DWARF output. */ 1621 const char * GTY((skip(""))) language; 1622 /* TODO: Non-optimization used to build this translation unit. */ 1623 /* TODO: Root of a partial DWARF tree for global types and decls. */ 1624}; 1625 1626struct GTY(()) tree_type_decl { 1627 struct tree_decl_non_common common; 1628 1629}; 1630 1631struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node 1632 { 1633 struct tree_statement_list_node *prev; 1634 struct tree_statement_list_node *next; 1635 tree stmt; 1636}; 1637 1638struct GTY(()) tree_statement_list 1639 { 1640 struct tree_typed typed; 1641 struct tree_statement_list_node *head; 1642 struct tree_statement_list_node *tail; 1643}; 1644 1645 1646/* Optimization options used by a function. */ 1647 1648struct GTY(()) tree_optimization_option { 1649 struct tree_common common; 1650 1651 /* The optimization options used by the user. */ 1652 struct cl_optimization opts; 1653 1654 /* Target optabs for this set of optimization options. This is of 1655 type `struct target_optabs *'. */ 1656 void *GTY ((atomic)) optabs; 1657 1658 /* The value of this_target_optabs against which the optabs above were 1659 generated. */ 1660 struct target_optabs *GTY ((skip)) base_optabs; 1661}; 1662 1663/* Forward declaration, defined in target-globals.h. */ 1664 1665struct GTY(()) target_globals; 1666 1667/* Target options used by a function. */ 1668 1669struct GTY(()) tree_target_option { 1670 struct tree_common common; 1671 1672 /* Target globals for the corresponding target option. */ 1673 struct target_globals *globals; 1674 1675 /* The optimization options used by the user. */ 1676 struct cl_target_option opts; 1677}; 1678 1679/* Define the overall contents of a tree node. 1680 It may be any of the structures declared above 1681 for various types of node. */ 1682union GTY ((ptr_alias (union lang_tree_node), 1683 desc ("tree_node_structure (&%h)"), variable_size)) tree_node { 1684 struct tree_base GTY ((tag ("TS_BASE"))) base; 1685 struct tree_typed GTY ((tag ("TS_TYPED"))) typed; 1686 struct tree_common GTY ((tag ("TS_COMMON"))) common; 1687 struct tree_int_cst GTY ((tag ("TS_INT_CST"))) int_cst; 1688 struct tree_real_cst GTY ((tag ("TS_REAL_CST"))) real_cst; 1689 struct tree_fixed_cst GTY ((tag ("TS_FIXED_CST"))) fixed_cst; 1690 struct tree_vector GTY ((tag ("TS_VECTOR"))) vector; 1691 struct tree_string GTY ((tag ("TS_STRING"))) string; 1692 struct tree_complex GTY ((tag ("TS_COMPLEX"))) complex; 1693 struct tree_identifier GTY ((tag ("TS_IDENTIFIER"))) identifier; 1694 struct tree_decl_minimal GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal; 1695 struct tree_decl_common GTY ((tag ("TS_DECL_COMMON"))) decl_common; 1696 struct tree_decl_with_rtl GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl; 1697 struct tree_decl_non_common GTY ((tag ("TS_DECL_NON_COMMON"))) 1698 decl_non_common; 1699 struct tree_parm_decl GTY ((tag ("TS_PARM_DECL"))) parm_decl; 1700 struct tree_decl_with_vis GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis; 1701 struct tree_var_decl GTY ((tag ("TS_VAR_DECL"))) var_decl; 1702 struct tree_field_decl GTY ((tag ("TS_FIELD_DECL"))) field_decl; 1703 struct tree_label_decl GTY ((tag ("TS_LABEL_DECL"))) label_decl; 1704 struct tree_result_decl GTY ((tag ("TS_RESULT_DECL"))) result_decl; 1705 struct tree_const_decl GTY ((tag ("TS_CONST_DECL"))) const_decl; 1706 struct tree_type_decl GTY ((tag ("TS_TYPE_DECL"))) type_decl; 1707 struct tree_function_decl GTY ((tag ("TS_FUNCTION_DECL"))) function_decl; 1708 struct tree_translation_unit_decl GTY ((tag ("TS_TRANSLATION_UNIT_DECL"))) 1709 translation_unit_decl; 1710 struct tree_type_common GTY ((tag ("TS_TYPE_COMMON"))) type_common; 1711 struct tree_type_with_lang_specific GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC"))) 1712 type_with_lang_specific; 1713 struct tree_type_non_common GTY ((tag ("TS_TYPE_NON_COMMON"))) 1714 type_non_common; 1715 struct tree_list GTY ((tag ("TS_LIST"))) list; 1716 struct tree_vec GTY ((tag ("TS_VEC"))) vec; 1717 struct tree_exp GTY ((tag ("TS_EXP"))) exp; 1718 struct tree_ssa_name GTY ((tag ("TS_SSA_NAME"))) ssa_name; 1719 struct tree_block GTY ((tag ("TS_BLOCK"))) block; 1720 struct tree_binfo GTY ((tag ("TS_BINFO"))) binfo; 1721 struct tree_statement_list GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list; 1722 struct tree_constructor GTY ((tag ("TS_CONSTRUCTOR"))) constructor; 1723 struct tree_omp_clause GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause; 1724 struct tree_optimization_option GTY ((tag ("TS_OPTIMIZATION"))) optimization; 1725 struct tree_target_option GTY ((tag ("TS_TARGET_OPTION"))) target_option; 1726}; 1727 1728/* Structure describing an attribute and a function to handle it. */ 1729struct attribute_spec { 1730 /* The name of the attribute (without any leading or trailing __), 1731 or NULL to mark the end of a table of attributes. */ 1732 const char *name; 1733 /* The minimum length of the list of arguments of the attribute. */ 1734 int min_length; 1735 /* The maximum length of the list of arguments of the attribute 1736 (-1 for no maximum). */ 1737 int max_length; 1738 /* Whether this attribute requires a DECL. If it does, it will be passed 1739 from types of DECLs, function return types and array element types to 1740 the DECLs, function types and array types respectively; but when 1741 applied to a type in any other circumstances, it will be ignored with 1742 a warning. (If greater control is desired for a given attribute, 1743 this should be false, and the flags argument to the handler may be 1744 used to gain greater control in that case.) */ 1745 bool decl_required; 1746 /* Whether this attribute requires a type. If it does, it will be passed 1747 from a DECL to the type of that DECL. */ 1748 bool type_required; 1749 /* Whether this attribute requires a function (or method) type. If it does, 1750 it will be passed from a function pointer type to the target type, 1751 and from a function return type (which is not itself a function 1752 pointer type) to the function type. */ 1753 bool function_type_required; 1754 /* Function to handle this attribute. NODE points to the node to which 1755 the attribute is to be applied. If a DECL, it should be modified in 1756 place; if a TYPE, a copy should be created. NAME is the name of the 1757 attribute (possibly with leading or trailing __). ARGS is the TREE_LIST 1758 of the arguments (which may be NULL). FLAGS gives further information 1759 about the context of the attribute. Afterwards, the attributes will 1760 be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate, 1761 unless *NO_ADD_ATTRS is set to true (which should be done on error, 1762 as well as in any other cases when the attributes should not be added 1763 to the DECL or TYPE). Depending on FLAGS, any attributes to be 1764 applied to another type or DECL later may be returned; 1765 otherwise the return value should be NULL_TREE. This pointer may be 1766 NULL if no special handling is required beyond the checks implied 1767 by the rest of this structure. */ 1768 tree (*handler) (tree *node, tree name, tree args, 1769 int flags, bool *no_add_attrs); 1770 /* Specifies if attribute affects type's identity. */ 1771 bool affects_type_identity; 1772}; 1773 1774/* These functions allow a front-end to perform a manual layout of a 1775 RECORD_TYPE. (For instance, if the placement of subsequent fields 1776 depends on the placement of fields so far.) Begin by calling 1777 start_record_layout. Then, call place_field for each of the 1778 fields. Then, call finish_record_layout. See layout_type for the 1779 default way in which these functions are used. */ 1780typedef struct record_layout_info_s { 1781 /* The RECORD_TYPE that we are laying out. */ 1782 tree t; 1783 /* The offset into the record so far, in bytes, not including bits in 1784 BITPOS. */ 1785 tree offset; 1786 /* The last known alignment of SIZE. */ 1787 unsigned int offset_align; 1788 /* The bit position within the last OFFSET_ALIGN bits, in bits. */ 1789 tree bitpos; 1790 /* The alignment of the record so far, in bits. */ 1791 unsigned int record_align; 1792 /* The alignment of the record so far, ignoring #pragma pack and 1793 __attribute__ ((packed)), in bits. */ 1794 unsigned int unpacked_align; 1795 /* The previous field laid out. */ 1796 tree prev_field; 1797 /* The static variables (i.e., class variables, as opposed to 1798 instance variables) encountered in T. */ 1799 vec<tree, va_gc> *pending_statics; 1800 /* Bits remaining in the current alignment group */ 1801 int remaining_in_alignment; 1802 /* True if we've seen a packed field that didn't have normal 1803 alignment anyway. */ 1804 int packed_maybe_necessary; 1805} *record_layout_info; 1806 1807/* Iterator for going through the function arguments. */ 1808struct function_args_iterator { 1809 tree next; /* TREE_LIST pointing to the next argument */ 1810}; 1811 1812/* Structures to map from a tree to another tree. */ 1813struct GTY(()) tree_map_base { 1814 tree from; 1815}; 1816 1817/* Map from a tree to another tree. */ 1818 1819struct GTY((for_user)) tree_map { 1820 struct tree_map_base base; 1821 unsigned int hash; 1822 tree to; 1823}; 1824 1825/* Map from a decl tree to another tree. */ 1826struct GTY((for_user)) tree_decl_map { 1827 struct tree_map_base base; 1828 tree to; 1829}; 1830 1831/* Map from a tree to an int. */ 1832struct GTY((for_user)) tree_int_map { 1833 struct tree_map_base base; 1834 unsigned int to; 1835}; 1836 1837/* Map from a decl tree to a tree vector. */ 1838struct GTY((for_user)) tree_vec_map { 1839 struct tree_map_base base; 1840 vec<tree, va_gc> *to; 1841}; 1842 1843/* Abstract iterators for CALL_EXPRs. These static inline definitions 1844 have to go towards the end of tree.h so that union tree_node is fully 1845 defined by this point. */ 1846 1847/* Structure containing iterator state. */ 1848struct call_expr_arg_iterator { 1849 tree t; /* the call_expr */ 1850 int n; /* argument count */ 1851 int i; /* next argument index */ 1852}; 1853 1854struct const_call_expr_arg_iterator { 1855 const_tree t; /* the call_expr */ 1856 int n; /* argument count */ 1857 int i; /* next argument index */ 1858}; 1859 1860/* The builtin_info structure holds the FUNCTION_DECL of the standard builtin 1861 function, and flags. */ 1862struct GTY(()) builtin_info_type { 1863 tree decl; 1864 /* Whether the user can use <xxx> instead of explicitly using calls 1865 to __builtin_<xxx>. */ 1866 unsigned implicit_p : 1; 1867 /* Whether the user has provided a declaration of <xxx>. */ 1868 unsigned declared_p : 1; 1869}; 1870 1871 1872/*--------------------------------------------------------------------------- 1873 Global variables 1874---------------------------------------------------------------------------*/ 1875/* Matrix describing the structures contained in a given tree code. */ 1876extern unsigned char tree_contains_struct[MAX_TREE_CODES][64]; 1877 1878/* Class of tree given its code. */ 1879extern const enum tree_code_class tree_code_type[]; 1880 1881/* Each tree code class has an associated string representation. 1882 These must correspond to the tree_code_class entries. */ 1883extern const char *const tree_code_class_strings[]; 1884 1885/* Number of argument-words in each kind of tree-node. */ 1886extern const unsigned char tree_code_length[]; 1887 1888/* Vector of all alias pairs for global symbols. */ 1889extern GTY(()) vec<alias_pair, va_gc> *alias_pairs; 1890 1891/* Names of all the built_in classes. */ 1892extern const char *const built_in_class_names[BUILT_IN_LAST]; 1893 1894/* Names of all the built_in functions. */ 1895extern const char * built_in_names[(int) END_BUILTINS]; 1896 1897/* Number of operands and names for each OMP_CLAUSE node. */ 1898extern unsigned const char omp_clause_num_ops[]; 1899extern const char * const omp_clause_code_name[]; 1900 1901/* A vector of all translation-units. */ 1902extern GTY (()) vec<tree, va_gc> *all_translation_units; 1903 1904/* Vector of standard trees used by the C compiler. */ 1905extern GTY(()) tree global_trees[TI_MAX]; 1906 1907/* The standard C integer types. Use integer_type_kind to index into 1908 this array. */ 1909extern GTY(()) tree integer_types[itk_none]; 1910 1911/* Types used to represent sizes. */ 1912extern GTY(()) tree sizetype_tab[(int) stk_type_kind_last]; 1913 1914/* Arrays for keeping track of tree node statistics. */ 1915extern int tree_node_counts[]; 1916extern int tree_node_sizes[]; 1917 1918/* True if we are in gimple form and the actions of the folders need to 1919 be restricted. False if we are not in gimple form and folding is not 1920 restricted to creating gimple expressions. */ 1921extern bool in_gimple_form; 1922 1923/* Functional interface to the builtin functions. */ 1924extern GTY(()) builtin_info_type builtin_info[(int)END_BUILTINS]; 1925 1926/* If nonzero, an upper limit on alignment of structure fields, in bits, */ 1927extern unsigned int maximum_field_alignment; 1928 1929/* Points to the FUNCTION_DECL of the function whose body we are reading. */ 1930extern GTY(()) tree current_function_decl; 1931 1932/* Nonzero means a FUNC_BEGIN label was emitted. */ 1933extern GTY(()) const char * current_function_func_begin_label; 1934 1935#endif // GCC_TREE_CORE_H 1936