gcc/tree-core.h

   1 /* Core data structures for the 'tree' type.
   2    Copyright (C) 1989-2015 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 /* 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 ---------------------------------------------------------------------------*/
  30 struct function;
  31 struct real_value;
  32 struct fixed_value;
  33 struct ptr_info_def;
  34 struct range_info_def;
  35 struct 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
 123 enum tree_code {
 124 #include "all-tree.def"
 125 MAX_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.  */
 141 enum 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,
 155 enum 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.  */
 191 enum 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.  */
 210 enum 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,
 398 enum tree_node_structure_enum {
 399 #include "treestruct.def"
 400   LAST_TS_ENUM
 401 };
 402 #undef DEFTREESTRUCT
 403
 404 enum 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
 414 enum 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.  */
 426 enum 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
 437 enum 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.  */
 446 enum 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.  */
 615 enum 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.  */
 660 enum 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.  */
 667 enum 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.  */
 692 enum 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
 700 enum 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.  */
 709 enum 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
 729 enum 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.  */
 737 enum 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.  */
 750 struct GTY(()) alias_pair {
 751   tree decl;
 752   tree target;
 753 };
 754
 755 /* An initialization priority.  */
 756 typedef unsigned short priority_type;
 757
 758 /* The type of a callback function for walking over tree structure.  */
 759 typedef tree (*walk_tree_fn) (tree *, int *, void *);
 760
 761 /* The type of a callback function that represents a custom walk_tree.  */
 762 typedef 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
 790 struct 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
1152 struct GTY(()) tree_typed {
1153   struct tree_base base;
1154   tree type;
1155 };
1156
1157 struct GTY(()) tree_common {
1158   struct tree_typed typed;
1159   tree chain;
1160 };
1161
1162 struct GTY(()) tree_int_cst {
1163   struct tree_typed typed;
1164   HOST_WIDE_INT val[1];
1165 };
1166
1167
1168 struct GTY(()) tree_real_cst {
1169   struct tree_typed typed;
1170   struct real_value * real_cst_ptr;
1171 };
1172
1173 struct GTY(()) tree_fixed_cst {
1174   struct tree_typed typed;
1175   struct fixed_value * fixed_cst_ptr;
1176 };
1177
1178 struct GTY(()) tree_string {
1179   struct tree_typed typed;
1180   int length;
1181   char str[1];
1182 };
1183
1184 struct GTY(()) tree_complex {
1185   struct tree_typed typed;
1186   tree real;
1187   tree imag;
1188 };
1189
1190 struct GTY(()) tree_vector {
1191   struct tree_typed typed;
1192   tree GTY ((length ("TYPE_VECTOR_SUBPARTS (TREE_TYPE ((tree)&%h))"))) elts[1];
1193 };
1194
1195 struct GTY(()) tree_identifier {
1196   struct tree_common common;
1197   struct ht_identifier id;
1198 };
1199
1200 struct GTY(()) tree_list {
1201   struct tree_common common;
1202   tree purpose;
1203   tree value;
1204 };
1205
1206 struct 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.  */
1215 struct GTY(()) constructor_elt {
1216   tree index;
1217   tree value;
1218 };
1219
1220 struct GTY(()) tree_constructor {
1221   struct tree_typed typed;
1222   vec<constructor_elt, va_gc> *elts;
1223 };
1224
1225 enum 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
1233 enum 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
1244 struct 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.  */
1254 struct 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
1266 struct 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
1288 struct 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
1296 struct 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
1319 struct 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   /* Pointer to the DWARF lexical block.  */
1339   struct die_struct *die;
1340 };
1341
1342 struct GTY(()) tree_type_common {
1343   struct tree_common common;
1344   tree size;
1345   tree size_unit;
1346   tree attributes;
1347   unsigned int uid;
1348
1349   unsigned int precision : 10;
1350   unsigned no_force_blk_flag : 1;
1351   unsigned needs_constructing_flag : 1;
1352   unsigned transparent_aggr_flag : 1;
1353   unsigned restrict_flag : 1;
1354   unsigned contains_placeholder_bits : 2;
1355
1356   ENUM_BITFIELD(machine_mode) mode : 8;
1357
1358   unsigned string_flag : 1;
1359   unsigned lang_flag_0 : 1;
1360   unsigned lang_flag_1 : 1;
1361   unsigned lang_flag_2 : 1;
1362   unsigned lang_flag_3 : 1;
1363   unsigned lang_flag_4 : 1;
1364   unsigned lang_flag_5 : 1;
1365   unsigned lang_flag_6 : 1;
1366
1367   unsigned int align;
1368   alias_set_type alias_set;
1369   tree pointer_to;
1370   tree reference_to;
1371   union tree_type_symtab {
1372     int GTY ((tag ("TYPE_SYMTAB_IS_ADDRESS"))) address;
1373     const char * GTY ((tag ("TYPE_SYMTAB_IS_POINTER"))) pointer;
1374     struct die_struct * GTY ((tag ("TYPE_SYMTAB_IS_DIE"))) die;
1375   } GTY ((desc ("debug_hooks->tree_type_symtab_field"))) symtab;
1376   tree canonical;
1377   tree next_variant;
1378   tree main_variant;
1379   tree context;
1380   tree name;
1381 };
1382
1383 struct GTY(()) tree_type_with_lang_specific {
1384   struct tree_type_common common;
1385   /* Points to a structure whose details depend on the language in use.  */
1386   struct lang_type *lang_specific;
1387 };
1388
1389 struct GTY(()) tree_type_non_common {
1390   struct tree_type_with_lang_specific with_lang_specific;
1391   tree values;
1392   tree minval;
1393   tree maxval;
1394   tree binfo;
1395 };
1396
1397 struct GTY (()) tree_binfo {
1398   struct tree_common common;
1399
1400   tree offset;
1401   tree vtable;
1402   tree virtuals;
1403   tree vptr_field;
1404   vec<tree, va_gc> *base_accesses;
1405   tree inheritance;
1406
1407   tree vtt_subvtt;
1408   tree vtt_vptr;
1409
1410   vec<tree, va_gc> base_binfos;
1411 };
1412
1413 struct GTY(()) tree_decl_minimal {
1414   struct tree_common common;
1415   location_t locus;
1416   unsigned int uid;
1417   tree name;
1418   tree context;
1419 };
1420
1421 struct GTY(()) tree_decl_common {
1422   struct tree_decl_minimal common;
1423   tree size;
1424
1425   ENUM_BITFIELD(machine_mode) mode : 8;
1426
1427   unsigned nonlocal_flag : 1;
1428   unsigned virtual_flag : 1;
1429   unsigned ignored_flag : 1;
1430   unsigned abstract_flag : 1;
1431   unsigned artificial_flag : 1;
1432   unsigned preserve_flag: 1;
1433   unsigned debug_expr_is_from : 1;
1434
1435   unsigned lang_flag_0 : 1;
1436   unsigned lang_flag_1 : 1;
1437   unsigned lang_flag_2 : 1;
1438   unsigned lang_flag_3 : 1;
1439   unsigned lang_flag_4 : 1;
1440   unsigned lang_flag_5 : 1;
1441   unsigned lang_flag_6 : 1;
1442   unsigned lang_flag_7 : 1;
1443   unsigned lang_flag_8 : 1;
1444
1445   /* In VAR_DECL and PARM_DECL, this is DECL_REGISTER.  */
1446   unsigned decl_flag_0 : 1;
1447   /* In FIELD_DECL, this is DECL_BIT_FIELD
1448      In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL.
1449      In TYPE_DECL, this is TYPE_DECL_SUPPRESS_DEBUG.  */
1450   unsigned decl_flag_1 : 1;
1451   /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
1452      In VAR_DECL, PARM_DECL and RESULT_DECL, this is
1453      DECL_HAS_VALUE_EXPR_P.  */
1454   unsigned decl_flag_2 : 1;
1455   /* 1 bit unused.  */
1456   unsigned decl_flag_3 : 1;
1457   /* Logically, these two would go in a theoretical base shared by var and
1458      parm decl. */
1459   unsigned gimple_reg_flag : 1;
1460   /* In VAR_DECL, PARM_DECL and RESULT_DECL, this is DECL_BY_REFERENCE.  */
1461   unsigned decl_by_reference_flag : 1;
1462   /* In a VAR_DECL and PARM_DECL, this is DECL_READ_P.  */
1463   unsigned decl_read_flag : 1;
1464   /* In a VAR_DECL or RESULT_DECL, this is DECL_NONSHAREABLE.  */
1465   unsigned decl_nonshareable_flag : 1;
1466
1467   /* DECL_OFFSET_ALIGN, used only for FIELD_DECLs.  */
1468   unsigned int off_align : 8;
1469
1470   /* 24 bits unused.  */
1471
1472   /* DECL_ALIGN.  It should have the same size as TYPE_ALIGN.  */
1473   unsigned int align;
1474
1475   /* UID for points-to sets, stable over copying from inlining.  */
1476   unsigned int pt_uid;
1477
1478   tree size_unit;
1479   tree initial;
1480   tree attributes;
1481   tree abstract_origin;
1482
1483   /* Points to a structure whose details depend on the language in use.  */
1484   struct lang_decl *lang_specific;
1485 };
1486
1487 struct GTY(()) tree_decl_with_rtl {
1488   struct tree_decl_common common;
1489   rtx rtl;
1490 };
1491
1492 struct GTY(()) tree_field_decl {
1493   struct tree_decl_common common;
1494
1495   tree offset;
1496   tree bit_field_type;
1497   tree qualifier;
1498   tree bit_offset;
1499   tree fcontext;
1500 };
1501
1502 struct GTY(()) tree_label_decl {
1503   struct tree_decl_with_rtl common;
1504   int label_decl_uid;
1505   int eh_landing_pad_nr;
1506 };
1507
1508 struct GTY(()) tree_result_decl {
1509   struct tree_decl_with_rtl common;
1510 };
1511
1512 struct GTY(()) tree_const_decl {
1513   struct tree_decl_common common;
1514 };
1515
1516 struct GTY(()) tree_parm_decl {
1517   struct tree_decl_with_rtl common;
1518   rtx incoming_rtl;
1519 };
1520
1521 struct GTY(()) tree_decl_with_vis {
1522  struct tree_decl_with_rtl common;
1523  tree assembler_name;
1524  struct symtab_node *symtab_node;
1525
1526  /* Belong to VAR_DECL exclusively.  */
1527  unsigned defer_output : 1;
1528  unsigned hard_register : 1;
1529  unsigned common_flag : 1;
1530  unsigned in_text_section : 1;
1531  unsigned in_constant_pool : 1;
1532  unsigned dllimport_flag : 1;
1533  /* Don't belong to VAR_DECL exclusively.  */
1534  unsigned weak_flag : 1;
1535
1536  unsigned seen_in_bind_expr : 1;
1537  unsigned comdat_flag : 1;
1538  /* Used for FUNCTION_DECL, VAR_DECL and in C++ for TYPE_DECL.  */
1539  ENUM_BITFIELD(symbol_visibility) visibility : 2;
1540  unsigned visibility_specified : 1;
1541
1542  /* Belong to FUNCTION_DECL exclusively.  */
1543  unsigned init_priority_p : 1;
1544  /* Used by C++ only.  Might become a generic decl flag.  */
1545  unsigned shadowed_for_var_p : 1;
1546  /* Belong to FUNCTION_DECL exclusively.  */
1547  unsigned cxx_constructor : 1;
1548  /* Belong to FUNCTION_DECL exclusively.  */
1549  unsigned cxx_destructor : 1;
1550  /* Belong to FUNCTION_DECL exclusively.  */
1551  unsigned final : 1;
1552  /* Belong to FUNCTION_DECL exclusively.  */
1553  unsigned regdecl_flag : 1;
1554  /* 14 unused bits. */
1555 };
1556
1557 struct GTY(()) tree_var_decl {
1558   struct tree_decl_with_vis common;
1559 };
1560
1561 struct GTY(()) tree_decl_non_common {
1562   struct tree_decl_with_vis common;
1563   /* Almost all FE's use this.  */
1564   tree result;
1565 };
1566
1567 /* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
1568    arguments/result/saved_tree fields by front ends.   It was either inherit
1569    FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
1570    which seemed a bit strange.  */
1571
1572 struct GTY(()) tree_function_decl {
1573   struct tree_decl_non_common common;
1574
1575   struct function *f;
1576
1577   /* Arguments of the function.  */
1578   tree arguments;
1579   /* The personality function. Used for stack unwinding. */
1580   tree personality;
1581
1582   /* Function specific options that are used by this function.  */
1583   tree function_specific_target;        /* target options */
1584   tree function_specific_optimization;  /* optimization options */
1585
1586   /* Generic function body.  */
1587   tree saved_tree;
1588   /* Index within a virtual table.  */
1589   tree vindex;
1590
1591   /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
1592      DECL_FUNCTION_CODE.  Otherwise unused.
1593      ???  The bitfield needs to be able to hold all target function
1594           codes as well.  */
1595   ENUM_BITFIELD(built_in_function) function_code : 12;
1596   ENUM_BITFIELD(built_in_class) built_in_class : 2;
1597
1598   unsigned static_ctor_flag : 1;
1599   unsigned static_dtor_flag : 1;
1600
1601   unsigned uninlinable : 1;
1602   unsigned possibly_inlined : 1;
1603   unsigned novops_flag : 1;
1604   unsigned returns_twice_flag : 1;
1605   unsigned malloc_flag : 1;
1606   unsigned operator_new_flag : 1;
1607   unsigned declared_inline_flag : 1;
1608   unsigned no_inline_warning_flag : 1;
1609
1610   unsigned no_instrument_function_entry_exit : 1;
1611   unsigned no_limit_stack : 1;
1612   unsigned disregard_inline_limits : 1;
1613   unsigned pure_flag : 1;
1614   unsigned looping_const_or_pure_flag : 1;
1615   unsigned has_debug_args_flag : 1;
1616   unsigned tm_clone_flag : 1;
1617   unsigned versioned_function : 1;
1618   /* No bits left.  */
1619 };
1620
1621 struct GTY(()) tree_translation_unit_decl {
1622   struct tree_decl_common common;
1623   /* Source language of this translation unit.  Used for DWARF output.  */
1624   const char * GTY((skip(""))) language;
1625   /* TODO: Non-optimization used to build this translation unit.  */
1626   /* TODO: Root of a partial DWARF tree for global types and decls.  */
1627 };
1628
1629 struct GTY(()) tree_type_decl {
1630   struct tree_decl_non_common common;
1631
1632 };
1633
1634 struct GTY ((chain_next ("%h.next"), chain_prev ("%h.prev"))) tree_statement_list_node
1635  {
1636   struct tree_statement_list_node *prev;
1637   struct tree_statement_list_node *next;
1638   tree stmt;
1639 };
1640
1641 struct GTY(()) tree_statement_list
1642  {
1643   struct tree_typed typed;
1644   struct tree_statement_list_node *head;
1645   struct tree_statement_list_node *tail;
1646 };
1647
1648
1649 /* Optimization options used by a function.  */
1650
1651 struct GTY(()) tree_optimization_option {
1652   struct tree_common common;
1653
1654   /* The optimization options used by the user.  */
1655   struct cl_optimization *opts;
1656
1657   /* Target optabs for this set of optimization options.  This is of
1658      type `struct target_optabs *'.  */
1659   void *GTY ((atomic)) optabs;
1660
1661   /* The value of this_target_optabs against which the optabs above were
1662      generated.  */
1663   struct target_optabs *GTY ((skip)) base_optabs;
1664 };
1665
1666 /* Forward declaration, defined in target-globals.h.  */
1667
1668 struct GTY(()) target_globals;
1669
1670 /* Target options used by a function.  */
1671
1672 struct GTY(()) tree_target_option {
1673   struct tree_common common;
1674
1675   /* Target globals for the corresponding target option.  */
1676   struct target_globals *globals;
1677
1678   /* The optimization options used by the user.  */
1679   struct cl_target_option *opts;
1680 };
1681
1682 /* Define the overall contents of a tree node.
1683    It may be any of the structures declared above
1684    for various types of node.  */
1685 union GTY ((ptr_alias (union lang_tree_node),
1686             desc ("tree_node_structure (&%h)"), variable_size)) tree_node {
1687   struct tree_base GTY ((tag ("TS_BASE"))) base;
1688   struct tree_typed GTY ((tag ("TS_TYPED"))) typed;
1689   struct tree_common GTY ((tag ("TS_COMMON"))) common;
1690   struct tree_int_cst GTY ((tag ("TS_INT_CST"))) int_cst;
1691   struct tree_real_cst GTY ((tag ("TS_REAL_CST"))) real_cst;
1692   struct tree_fixed_cst GTY ((tag ("TS_FIXED_CST"))) fixed_cst;
1693   struct tree_vector GTY ((tag ("TS_VECTOR"))) vector;
1694   struct tree_string GTY ((tag ("TS_STRING"))) string;
1695   struct tree_complex GTY ((tag ("TS_COMPLEX"))) complex;
1696   struct tree_identifier GTY ((tag ("TS_IDENTIFIER"))) identifier;
1697   struct tree_decl_minimal GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal;
1698   struct tree_decl_common GTY ((tag ("TS_DECL_COMMON"))) decl_common;
1699   struct tree_decl_with_rtl GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl;
1700   struct tree_decl_non_common  GTY ((tag ("TS_DECL_NON_COMMON")))
1701     decl_non_common;
1702   struct tree_parm_decl  GTY  ((tag ("TS_PARM_DECL"))) parm_decl;
1703   struct tree_decl_with_vis GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis;
1704   struct tree_var_decl GTY ((tag ("TS_VAR_DECL"))) var_decl;
1705   struct tree_field_decl GTY ((tag ("TS_FIELD_DECL"))) field_decl;
1706   struct tree_label_decl GTY ((tag ("TS_LABEL_DECL"))) label_decl;
1707   struct tree_result_decl GTY ((tag ("TS_RESULT_DECL"))) result_decl;
1708   struct tree_const_decl GTY ((tag ("TS_CONST_DECL"))) const_decl;
1709   struct tree_type_decl GTY ((tag ("TS_TYPE_DECL"))) type_decl;
1710   struct tree_function_decl GTY ((tag ("TS_FUNCTION_DECL"))) function_decl;
1711   struct tree_translation_unit_decl GTY ((tag ("TS_TRANSLATION_UNIT_DECL")))
1712     translation_unit_decl;
1713   struct tree_type_common GTY ((tag ("TS_TYPE_COMMON"))) type_common;
1714   struct tree_type_with_lang_specific GTY ((tag ("TS_TYPE_WITH_LANG_SPECIFIC")))
1715     type_with_lang_specific;
1716   struct tree_type_non_common GTY ((tag ("TS_TYPE_NON_COMMON")))
1717     type_non_common;
1718   struct tree_list GTY ((tag ("TS_LIST"))) list;
1719   struct tree_vec GTY ((tag ("TS_VEC"))) vec;
1720   struct tree_exp GTY ((tag ("TS_EXP"))) exp;
1721   struct tree_ssa_name GTY ((tag ("TS_SSA_NAME"))) ssa_name;
1722   struct tree_block GTY ((tag ("TS_BLOCK"))) block;
1723   struct tree_binfo GTY ((tag ("TS_BINFO"))) binfo;
1724   struct tree_statement_list GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list;
1725   struct tree_constructor GTY ((tag ("TS_CONSTRUCTOR"))) constructor;
1726   struct tree_omp_clause GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause;
1727   struct tree_optimization_option GTY ((tag ("TS_OPTIMIZATION"))) optimization;
1728   struct tree_target_option GTY ((tag ("TS_TARGET_OPTION"))) target_option;
1729 };
1730
1731 /* Structure describing an attribute and a function to handle it.  */
1732 struct attribute_spec {
1733   /* The name of the attribute (without any leading or trailing __),
1734      or NULL to mark the end of a table of attributes.  */
1735   const char *name;
1736   /* The minimum length of the list of arguments of the attribute.  */
1737   int min_length;
1738   /* The maximum length of the list of arguments of the attribute
1739      (-1 for no maximum).  */
1740   int max_length;
1741   /* Whether this attribute requires a DECL.  If it does, it will be passed
1742      from types of DECLs, function return types and array element types to
1743      the DECLs, function types and array types respectively; but when
1744      applied to a type in any other circumstances, it will be ignored with
1745      a warning.  (If greater control is desired for a given attribute,
1746      this should be false, and the flags argument to the handler may be
1747      used to gain greater control in that case.)  */
1748   bool decl_required;
1749   /* Whether this attribute requires a type.  If it does, it will be passed
1750      from a DECL to the type of that DECL.  */
1751   bool type_required;
1752   /* Whether this attribute requires a function (or method) type.  If it does,
1753      it will be passed from a function pointer type to the target type,
1754      and from a function return type (which is not itself a function
1755      pointer type) to the function type.  */
1756   bool function_type_required;
1757   /* Function to handle this attribute.  NODE points to the node to which
1758      the attribute is to be applied.  If a DECL, it should be modified in
1759      place; if a TYPE, a copy should be created.  NAME is the name of the
1760      attribute (possibly with leading or trailing __).  ARGS is the TREE_LIST
1761      of the arguments (which may be NULL).  FLAGS gives further information
1762      about the context of the attribute.  Afterwards, the attributes will
1763      be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
1764      unless *NO_ADD_ATTRS is set to true (which should be done on error,
1765      as well as in any other cases when the attributes should not be added
1766      to the DECL or TYPE).  Depending on FLAGS, any attributes to be
1767      applied to another type or DECL later may be returned;
1768      otherwise the return value should be NULL_TREE.  This pointer may be
1769      NULL if no special handling is required beyond the checks implied
1770      by the rest of this structure.  */
1771   tree (*handler) (tree *node, tree name, tree args,
1772                    int flags, bool *no_add_attrs);
1773   /* Specifies if attribute affects type's identity.  */
1774   bool affects_type_identity;
1775 };
1776
1777 /* These functions allow a front-end to perform a manual layout of a
1778    RECORD_TYPE.  (For instance, if the placement of subsequent fields
1779    depends on the placement of fields so far.)  Begin by calling
1780    start_record_layout.  Then, call place_field for each of the
1781    fields.  Then, call finish_record_layout.  See layout_type for the
1782    default way in which these functions are used.  */
1783 typedef struct record_layout_info_s {
1784   /* The RECORD_TYPE that we are laying out.  */
1785   tree t;
1786   /* The offset into the record so far, in bytes, not including bits in
1787      BITPOS.  */
1788   tree offset;
1789   /* The last known alignment of SIZE.  */
1790   unsigned int offset_align;
1791   /* The bit position within the last OFFSET_ALIGN bits, in bits.  */
1792   tree bitpos;
1793   /* The alignment of the record so far, in bits.  */
1794   unsigned int record_align;
1795   /* The alignment of the record so far, ignoring #pragma pack and
1796      __attribute__ ((packed)), in bits.  */
1797   unsigned int unpacked_align;
1798   /* The previous field laid out.  */
1799   tree prev_field;
1800   /* The static variables (i.e., class variables, as opposed to
1801      instance variables) encountered in T.  */
1802   vec<tree, va_gc> *pending_statics;
1803   /* Bits remaining in the current alignment group */
1804   int remaining_in_alignment;
1805   /* True if we've seen a packed field that didn't have normal
1806      alignment anyway.  */
1807   int packed_maybe_necessary;
1808 } *record_layout_info;
1809
1810 /* Iterator for going through the function arguments.  */
1811 struct function_args_iterator {
1812   tree next;                    /* TREE_LIST pointing to the next argument */
1813 };
1814
1815 /* Structures to map from a tree to another tree.  */
1816 struct GTY(()) tree_map_base {
1817   tree from;
1818 };
1819
1820 /* Map from a tree to another tree.  */
1821
1822 struct GTY((for_user)) tree_map {
1823   struct tree_map_base base;
1824   unsigned int hash;
1825   tree to;
1826 };
1827
1828 /* Map from a decl tree to another tree.  */
1829 struct GTY((for_user)) tree_decl_map {
1830   struct tree_map_base base;
1831   tree to;
1832 };
1833
1834 /* Map from a tree to an int.  */
1835 struct GTY((for_user)) tree_int_map {
1836   struct tree_map_base base;
1837   unsigned int to;
1838 };
1839
1840 /* Map from a decl tree to a tree vector.  */
1841 struct GTY((for_user)) tree_vec_map {
1842   struct tree_map_base base;
1843   vec<tree, va_gc> *to;
1844 };
1845
1846 /* Abstract iterators for CALL_EXPRs.  These static inline definitions
1847    have to go towards the end of tree.h so that union tree_node is fully
1848    defined by this point.  */
1849
1850 /* Structure containing iterator state.  */
1851 struct call_expr_arg_iterator {
1852   tree t;       /* the call_expr */
1853   int n;        /* argument count */
1854   int i;        /* next argument index */
1855 };
1856
1857 struct const_call_expr_arg_iterator {
1858   const_tree t; /* the call_expr */
1859   int n;        /* argument count */
1860   int i;        /* next argument index */
1861 };
1862
1863 /* The builtin_info structure holds the FUNCTION_DECL of the standard builtin
1864    function, and flags.  */
1865 struct GTY(()) builtin_info_type {
1866   tree decl;
1867   /* Whether the user can use <xxx> instead of explicitly using calls
1868      to __builtin_<xxx>.  */
1869   unsigned implicit_p : 1;
1870   /* Whether the user has provided a declaration of <xxx>.  */
1871   unsigned declared_p : 1;
1872 };
1873
1874
1875 /*---------------------------------------------------------------------------
1876                                 Global variables
1877 ---------------------------------------------------------------------------*/
1878 /* Matrix describing the structures contained in a given tree code.  */
1879 extern unsigned char tree_contains_struct[MAX_TREE_CODES][64];
1880
1881 /* Class of tree given its code.  */
1882 extern const enum tree_code_class tree_code_type[];
1883
1884 /* Each tree code class has an associated string representation.
1885    These must correspond to the tree_code_class entries.  */
1886 extern const char *const tree_code_class_strings[];
1887
1888 /* Number of argument-words in each kind of tree-node.  */
1889 extern const unsigned char tree_code_length[];
1890
1891 /* Vector of all alias pairs for global symbols.  */
1892 extern GTY(()) vec<alias_pair, va_gc> *alias_pairs;
1893
1894 /* Names of all the built_in classes.  */
1895 extern const char *const built_in_class_names[BUILT_IN_LAST];
1896
1897 /* Names of all the built_in functions.  */
1898 extern const char * built_in_names[(int) END_BUILTINS];
1899
1900 /* Number of operands and names for each OMP_CLAUSE node.  */
1901 extern unsigned const char omp_clause_num_ops[];
1902 extern const char * const omp_clause_code_name[];
1903
1904 /* A vector of all translation-units.  */
1905 extern GTY (()) vec<tree, va_gc> *all_translation_units;
1906
1907 /* Vector of standard trees used by the C compiler.  */
1908 extern GTY(()) tree global_trees[TI_MAX];
1909
1910 /* The standard C integer types.  Use integer_type_kind to index into
1911    this array.  */
1912 extern GTY(()) tree integer_types[itk_none];
1913
1914 /* Types used to represent sizes.  */
1915 extern GTY(()) tree sizetype_tab[(int) stk_type_kind_last];
1916
1917 /* Arrays for keeping track of tree node statistics.  */
1918 extern int tree_node_counts[];
1919 extern int tree_node_sizes[];
1920
1921 /* True if we are in gimple form and the actions of the folders need to
1922    be restricted.  False if we are not in gimple form and folding is not
1923    restricted to creating gimple expressions.  */
1924 extern bool in_gimple_form;
1925
1926 /* Functional interface to the builtin functions.  */
1927 extern GTY(()) builtin_info_type builtin_info[(int)END_BUILTINS];
1928
1929 /* If nonzero, an upper limit on alignment of structure fields, in bits,  */
1930 extern unsigned int maximum_field_alignment;
1931
1932 /* Points to the FUNCTION_DECL of the function whose body we are reading.  */
1933 extern GTY(()) tree current_function_decl;
1934
1935 /* Nonzero means a FUNC_BEGIN label was emitted.  */
1936 extern GTY(()) const char * current_function_func_begin_label;
1937
1938 #endif  // GCC_TREE_CORE_H