gcc/c-family/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987-2013 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_C_COMMON_H
  21 #define GCC_C_COMMON_H
  22
  23 #include "splay-tree.h"
  24 #include "cpplib.h"
  25 #include "ggc.h"
  26 #include "tree.h"
  27
  28 /* In order for the format checking to accept the C frontend
  29    diagnostic framework extensions, you must include this file before
  30    diagnostic-core.h, not after.  The C front end formats are a subset of those
  31    for C++, so they are the appropriate set to use in common code;
  32    cp-tree.h overrides this for C++.  */
  33 #if defined(GCC_DIAGNOSTIC_CORE_H)
  34 #error \
  35 In order for the format checking to accept the C front end diagnostic \
  36 framework extensions, you must include this file before diagnostic-core.h \
  37 never after.
  38 #endif
  39 #ifndef GCC_DIAG_STYLE
  40 #define GCC_DIAG_STYLE __gcc_cdiag__
  41 #endif
  42 #include "diagnostic-core.h"
  43
  44 /* Usage of TREE_LANG_FLAG_?:
  45    0: IDENTIFIER_MARKED (used by search routines).
  46       C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
  47    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  48       STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
  49       C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
  50    2: unused
  51    3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
  52    4: unused
  53 */
  54
  55 /* Reserved identifiers.  This is the union of all the keywords for C,
  56    C++, and Objective-C.  All the type modifiers have to be in one
  57    block at the beginning, because they are used as mask bits.  There
  58    are 28 type modifiers; if we add many more we will have to redesign
  59    the mask mechanism.  */
  60
  61 enum rid
  62 {
  63   /* Modifiers: */
  64   /* C, in empirical order of frequency.  */
  65   RID_STATIC = 0,
  66   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  67   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  68   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  69   RID_NORETURN, RID_ATOMIC,
  70
  71   /* C extensions */
  72   RID_COMPLEX, RID_THREAD, RID_SAT,
  73
  74   /* C++ */
  75   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  76
  77   /* ObjC ("PQ" reserved words - they do not appear after a '@' and
  78      are keywords only in specific contexts)  */
  79   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  80
  81   /* ObjC ("PATTR" reserved words - they do not appear after a '@'
  82      and are keywords only as property attributes)  */
  83   RID_GETTER, RID_SETTER,
  84   RID_READONLY, RID_READWRITE,
  85   RID_ASSIGN, RID_RETAIN, RID_COPY,
  86   RID_NONATOMIC,
  87
  88   /* C (reserved and imaginary types not implemented, so any use is a
  89      syntax error) */
  90   RID_IMAGINARY,
  91
  92   /* C */
  93   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  94   RID_INT128,
  95   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  96   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  97   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  98   RID_SIZEOF,
  99
 100   /* C extensions */
 101   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
 102   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
 103   RID_TYPES_COMPATIBLE_P,      RID_BUILTIN_COMPLEX,          RID_BUILTIN_SHUFFLE,
 104   RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
 105   RID_FRACT, RID_ACCUM, RID_AUTO_TYPE,
 106
 107   /* C11 */
 108   RID_ALIGNAS, RID_GENERIC,
 109
 110   /* This means to warn that this is a C++ keyword, and then treat it
 111      as a normal identifier.  */
 112   RID_CXX_COMPAT_WARN,
 113
 114   /* GNU transactional memory extension */
 115   RID_TRANSACTION_ATOMIC, RID_TRANSACTION_RELAXED, RID_TRANSACTION_CANCEL,
 116
 117   /* Too many ways of getting the name of a function as a string */
 118   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
 119
 120   /* C++ (some of these are keywords in Objective-C as well, but only
 121      if they appear after a '@') */
 122   RID_BOOL,     RID_WCHAR,    RID_CLASS,
 123   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
 124   RID_TEMPLATE, RID_NULL,     RID_CATCH,
 125   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
 126   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
 127   RID_THIS,     RID_THROW,    RID_TRUE,
 128   RID_TRY,      RID_TYPENAME, RID_TYPEID,
 129   RID_USING,    RID_CHAR16,   RID_CHAR32,
 130
 131   /* casts */
 132   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
 133
 134   /* C++ extensions */
 135   RID_BASES,                   RID_DIRECT_BASES,
 136   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 137   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 138   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 139   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
 140   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 141   RID_IS_CLASS,                RID_IS_CONVERTIBLE_TO,
 142   RID_IS_EMPTY,                RID_IS_ENUM,
 143   RID_IS_FINAL,                RID_IS_LITERAL_TYPE,
 144   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 145   RID_IS_STD_LAYOUT,           RID_IS_TRIVIAL,
 146   RID_IS_UNION,                RID_UNDERLYING_TYPE,
 147
 148   /* C++11 */
 149   RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
 150
 151   /* Cilk Plus keywords.  */
 152   RID_CILK_SPAWN, RID_CILK_SYNC,
 153
 154   /* Objective-C ("AT" reserved words - they are only keywords when
 155      they follow '@')  */
 156   RID_AT_ENCODE,   RID_AT_END,
 157   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 158   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,  RID_AT_PACKAGE,
 159   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 160   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 161   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 162   RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
 163   RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
 164   RID_AT_INTERFACE,
 165   RID_AT_IMPLEMENTATION,
 166
 167   /* Named address support, mapping the keyword to a particular named address
 168      number.  Named address space 0 is reserved for the generic address.  If
 169      there are more than 254 named addresses, the addr_space_t type will need
 170      to be grown from an unsigned char to unsigned short.  */
 171   RID_ADDR_SPACE_0,             /* generic address */
 172   RID_ADDR_SPACE_1,
 173   RID_ADDR_SPACE_2,
 174   RID_ADDR_SPACE_3,
 175   RID_ADDR_SPACE_4,
 176   RID_ADDR_SPACE_5,
 177   RID_ADDR_SPACE_6,
 178   RID_ADDR_SPACE_7,
 179   RID_ADDR_SPACE_8,
 180   RID_ADDR_SPACE_9,
 181   RID_ADDR_SPACE_10,
 182   RID_ADDR_SPACE_11,
 183   RID_ADDR_SPACE_12,
 184   RID_ADDR_SPACE_13,
 185   RID_ADDR_SPACE_14,
 186   RID_ADDR_SPACE_15,
 187
 188   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 189   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 190
 191   RID_MAX,
 192
 193   RID_FIRST_MODIFIER = RID_STATIC,
 194   RID_LAST_MODIFIER = RID_ONEWAY,
 195
 196   RID_FIRST_CXX0X = RID_CONSTEXPR,
 197   RID_LAST_CXX0X = RID_STATIC_ASSERT,
 198   RID_FIRST_AT = RID_AT_ENCODE,
 199   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 200   RID_FIRST_PQ = RID_IN,
 201   RID_LAST_PQ = RID_ONEWAY,
 202   RID_FIRST_PATTR = RID_GETTER,
 203   RID_LAST_PATTR = RID_NONATOMIC
 204 };
 205
 206 #define OBJC_IS_AT_KEYWORD(rid) \
 207   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 208    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 209
 210 #define OBJC_IS_PQ_KEYWORD(rid) \
 211   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 212    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 213
 214 #define OBJC_IS_PATTR_KEYWORD(rid) \
 215   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
 216    (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
 217
 218 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
 219    'class') which are shared in a subtle way between Objective-C and
 220    C++.  When the lexer is lexing in Objective-C/Objective-C++, if it
 221    finds '@' followed by one of these identifiers (eg, '@class'), it
 222    recognizes the whole as an Objective-C keyword.  If the identifier
 223    is found elsewhere, it follows the rules of the C/C++ language.
 224  */
 225 #define OBJC_IS_CXX_KEYWORD(rid) \
 226   (rid == RID_CLASS                                                     \
 227    || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE   \
 228    || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
 229
 230 /* The elements of `ridpointers' are identifier nodes for the reserved
 231    type names and storage classes.  It is indexed by a RID_... value.  */
 232 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 233
 234 /* Standard named or nameless data types of the C compiler.  */
 235
 236 enum c_tree_index
 237 {
 238     CTI_CHAR16_TYPE,
 239     CTI_CHAR32_TYPE,
 240     CTI_WCHAR_TYPE,
 241     CTI_UNDERLYING_WCHAR_TYPE,
 242     CTI_WINT_TYPE,
 243     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 244     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 245     CTI_INTMAX_TYPE,
 246     CTI_UINTMAX_TYPE,
 247     CTI_WIDEST_INT_LIT_TYPE,
 248     CTI_WIDEST_UINT_LIT_TYPE,
 249
 250     /* Types for <stdint.h>, that may not be defined on all
 251        targets.  */
 252     CTI_SIG_ATOMIC_TYPE,
 253     CTI_INT8_TYPE,
 254     CTI_INT16_TYPE,
 255     CTI_INT32_TYPE,
 256     CTI_INT64_TYPE,
 257     CTI_UINT8_TYPE,
 258     CTI_UINT16_TYPE,
 259     CTI_UINT32_TYPE,
 260     CTI_UINT64_TYPE,
 261     CTI_INT_LEAST8_TYPE,
 262     CTI_INT_LEAST16_TYPE,
 263     CTI_INT_LEAST32_TYPE,
 264     CTI_INT_LEAST64_TYPE,
 265     CTI_UINT_LEAST8_TYPE,
 266     CTI_UINT_LEAST16_TYPE,
 267     CTI_UINT_LEAST32_TYPE,
 268     CTI_UINT_LEAST64_TYPE,
 269     CTI_INT_FAST8_TYPE,
 270     CTI_INT_FAST16_TYPE,
 271     CTI_INT_FAST32_TYPE,
 272     CTI_INT_FAST64_TYPE,
 273     CTI_UINT_FAST8_TYPE,
 274     CTI_UINT_FAST16_TYPE,
 275     CTI_UINT_FAST32_TYPE,
 276     CTI_UINT_FAST64_TYPE,
 277     CTI_INTPTR_TYPE,
 278     CTI_UINTPTR_TYPE,
 279
 280     CTI_CHAR_ARRAY_TYPE,
 281     CTI_CHAR16_ARRAY_TYPE,
 282     CTI_CHAR32_ARRAY_TYPE,
 283     CTI_WCHAR_ARRAY_TYPE,
 284     CTI_STRING_TYPE,
 285     CTI_CONST_STRING_TYPE,
 286
 287     /* Type for boolean expressions (bool in C++, int in C).  */
 288     CTI_TRUTHVALUE_TYPE,
 289     CTI_TRUTHVALUE_TRUE,
 290     CTI_TRUTHVALUE_FALSE,
 291
 292     CTI_DEFAULT_FUNCTION_TYPE,
 293
 294     /* These are not types, but we have to look them up all the time.  */
 295     CTI_FUNCTION_NAME_DECL,
 296     CTI_PRETTY_FUNCTION_NAME_DECL,
 297     CTI_C99_FUNCTION_NAME_DECL,
 298     CTI_SAVED_FUNCTION_NAME_DECLS,
 299
 300     CTI_VOID_ZERO,
 301
 302     CTI_NULL,
 303
 304     CTI_MAX
 305 };
 306
 307 #define C_CPP_HASHNODE(id) \
 308   (&(((struct c_common_identifier *) (id))->node))
 309 #define C_RID_CODE(id) \
 310   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 311 #define C_SET_RID_CODE(id, code) \
 312   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 313
 314 /* Identifier part common to the C front ends.  Inherits from
 315    tree_identifier, despite appearances.  */
 316 struct GTY(()) c_common_identifier {
 317   struct tree_common common;
 318   struct cpp_hashnode node;
 319 };
 320
 321 /* An entry in the reserved keyword table.  */
 322
 323 struct c_common_resword
 324 {
 325   const char *const word;
 326   ENUM_BITFIELD(rid) const rid : 16;
 327   const unsigned int disable   : 16;
 328 };
 329
 330 /* Extra cpp_ttype values for C++.  */
 331
 332 /* A token type for keywords, as opposed to ordinary identifiers.  */
 333 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
 334
 335 /* A token type for template-ids.  If a template-id is processed while
 336    parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
 337    the value of the CPP_TEMPLATE_ID is whatever was returned by
 338    cp_parser_template_id.  */
 339 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
 340
 341 /* A token type for nested-name-specifiers.  If a
 342    nested-name-specifier is processed while parsing tentatively, it is
 343    replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
 344    CPP_NESTED_NAME_SPECIFIER is whatever was returned by
 345    cp_parser_nested_name_specifier_opt.  */
 346 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
 347
 348 /* A token type for pre-parsed C++0x decltype.  */
 349 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
 350
 351 /* The number of token types, including C++-specific ones.  */
 352 #define N_CP_TTYPES ((int) (CPP_DECLTYPE + 1))
 353
 354 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 355    mask) is _true_.  Thus for keywords which are present in all
 356    languages the disable field is zero.  */
 357
 358 #define D_CONLY         0x001   /* C only (not in C++).  */
 359 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 360 #define D_C99           0x004   /* In C, C99 only.  */
 361 #define D_CXX0X         0x008   /* In C++, C++0X only.  */
 362 #define D_EXT           0x010   /* GCC extension.  */
 363 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 364 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 365 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 366 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 367 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 368
 369 /* The reserved keyword table.  */
 370 extern const struct c_common_resword c_common_reswords[];
 371
 372 /* The number of items in the reserved keyword table.  */
 373 extern const unsigned int num_c_common_reswords;
 374
 375 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 376 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 377 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 378 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 379 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 380 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 381 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 382 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 383 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 384 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 385 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 386
 387 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 388 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 389 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 390 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 391 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 392 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 393 #define c_uint16_type_node              c_global_trees[CTI_UINT16_TYPE]
 394 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 395 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 396 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 397 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 398 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 399 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 400 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 401 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 402 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 403 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 404 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 405 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 406 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 407 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 408 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 409 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 410 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 411 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 412 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 413 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 414
 415 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 416 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 417 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 418
 419 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 420 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 421 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 422 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 423 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 424 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 425
 426 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 427
 428 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 429 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 430 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 431 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 432
 433 /* A node for `((void) 0)'.  */
 434 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 435
 436 /* The node for C++ `__null'.  */
 437 #define null_node                       c_global_trees[CTI_NULL]
 438
 439 extern GTY(()) tree c_global_trees[CTI_MAX];
 440
 441 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 442    tree for size reasons.  */
 443 struct GTY((variable_size)) sorted_fields_type {
 444   int len;
 445   tree GTY((length ("%h.len"))) elts[1];
 446 };
 447
 448 /* Mark which labels are explicitly declared.
 449    These may be shadowed, and may be referenced from nested functions.  */
 450 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 451
 452 typedef enum c_language_kind
 453 {
 454   clk_c         = 0,            /* C90, C94 or C99 */
 455   clk_objc      = 1,            /* clk_c with ObjC features.  */
 456   clk_cxx       = 2,            /* ANSI/ISO C++ */
 457   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 458 }
 459 c_language_kind;
 460
 461 /* To test for a specific language use c_language, defined by each
 462    front end.  For "ObjC features" or "not C++" use the macros.  */
 463 extern c_language_kind c_language;
 464
 465 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 466 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 467
 468 /* The various name of operator that appears in error messages. */
 469 typedef enum ref_operator {
 470   /* NULL */
 471   RO_NULL,
 472   /* array indexing */
 473   RO_ARRAY_INDEXING,
 474   /* unary * */
 475   RO_UNARY_STAR,
 476   /* -> */
 477   RO_ARROW,
 478   /* implicit conversion */
 479   RO_IMPLICIT_CONVERSION,
 480   /* ->* */
 481   RO_ARROW_STAR
 482 } ref_operator;
 483
 484 /* Information about a statement tree.  */
 485
 486 struct GTY(()) stmt_tree_s {
 487   /* A stack of statement lists being collected.  */
 488   vec<tree, va_gc> *x_cur_stmt_list;
 489
 490   /* In C++, Nonzero if we should treat statements as full
 491      expressions.  In particular, this variable is non-zero if at the
 492      end of a statement we should destroy any temporaries created
 493      during that statement.  Similarly, if, at the end of a block, we
 494      should destroy any local variables in this block.  Normally, this
 495      variable is nonzero, since those are the normal semantics of
 496      C++.
 497
 498      This flag has no effect in C.  */
 499   int stmts_are_full_exprs_p;
 500 };
 501
 502 typedef struct stmt_tree_s *stmt_tree;
 503
 504 /* Global state pertinent to the current function.  Some C dialects
 505    extend this structure with additional fields.  */
 506
 507 struct GTY(()) c_language_function {
 508   /* While we are parsing the function, this contains information
 509      about the statement-tree that we are building.  */
 510   struct stmt_tree_s x_stmt_tree;
 511
 512   /* Vector of locally defined typedefs, for
 513      -Wunused-local-typedefs.  */
 514   vec<tree, va_gc> *local_typedefs;
 515 };
 516
 517 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
 518
 519 /* When building a statement-tree, this is the current statement list
 520    being collected.  */
 521 #define cur_stmt_list   (stmt_list_stack->last ())
 522
 523 #define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty())
 524
 525 /* Language-specific hooks.  */
 526
 527 /* If non-NULL, this function is called after a precompile header file
 528    is loaded.  */
 529 extern void (*lang_post_pch_load) (void);
 530
 531 extern void push_file_scope (void);
 532 extern void pop_file_scope (void);
 533 extern stmt_tree current_stmt_tree (void);
 534 extern tree push_stmt_list (void);
 535 extern tree pop_stmt_list (tree);
 536 extern tree add_stmt (tree);
 537 extern void push_cleanup (tree, tree, bool);
 538 extern tree pushdecl_top_level (tree);
 539 extern tree pushdecl (tree);
 540 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 541                                location_t, tree, tree);
 542 extern tree build_array_notation_expr (location_t, tree, tree, enum tree_code,
 543                                        location_t, tree, tree);
 544 extern tree build_array_notation_ref (location_t, tree, tree, tree, tree, tree);
 545 extern tree build_indirect_ref (location_t, tree, ref_operator);
 546
 547 extern int field_decl_cmp (const void *, const void *);
 548 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 549                                   void *);
 550 extern bool has_c_linkage (const_tree decl);
 551 \f
 552 /* Switches common to the C front ends.  */
 553
 554 /* Nonzero means don't output line number information.  */
 555
 556 extern char flag_no_line_commands;
 557
 558 /* Nonzero causes -E output not to be done, but directives such as
 559    #define that have side effects are still obeyed.  */
 560
 561 extern char flag_no_output;
 562
 563 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 564    'N' or 'U' of the command line switch.  */
 565
 566 extern char flag_dump_macros;
 567
 568 /* Nonzero means pass #include lines through to the output.  */
 569
 570 extern char flag_dump_includes;
 571
 572 /* Nonzero means process PCH files while preprocessing.  */
 573
 574 extern bool flag_pch_preprocess;
 575
 576 /* The file name to which we should write a precompiled header, or
 577    NULL if no header will be written in this compile.  */
 578
 579 extern const char *pch_file;
 580
 581 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 582    user's namespace.  */
 583
 584 extern int flag_iso;
 585
 586 /* C/ObjC language option variables.  */
 587
 588
 589 /* Nonzero means allow type mismatches in conditional expressions;
 590    just make their values `void'.  */
 591
 592 extern int flag_cond_mismatch;
 593
 594 /* Nonzero means enable C89 Amendment 1 features.  */
 595
 596 extern int flag_isoc94;
 597
 598 /* Nonzero means use the ISO C99 (or C11) dialect of C.  */
 599
 600 extern int flag_isoc99;
 601
 602 /* Nonzero means use the ISO C11 dialect of C.  */
 603
 604 extern int flag_isoc11;
 605
 606 /* Nonzero means that we have builtin functions, and main is an int.  */
 607
 608 extern int flag_hosted;
 609
 610 /* ObjC language option variables.  */
 611
 612
 613 /* Tells the compiler that this is a special run.  Do not perform any
 614    compiling, instead we are to test some platform dependent features
 615    and output a C header file with appropriate definitions.  */
 616
 617 extern int print_struct_values;
 618
 619 /* Tells the compiler what is the constant string class for ObjC.  */
 620
 621 extern const char *constant_string_class_name;
 622
 623
 624 /* C++ language option variables.  */
 625
 626
 627 /* Nonzero means generate separate instantiation control files and
 628    juggle them at link time.  */
 629
 630 extern int flag_use_repository;
 631
 632 /* The supported C++ dialects.  */
 633
 634 enum cxx_dialect {
 635   /* C++98 with TC1  */
 636   cxx98,
 637   cxx03 = cxx98,
 638   /* C++11  */
 639   cxx0x,
 640   cxx11 = cxx0x,
 641   /* C++1y (C++17?) */
 642   cxx1y
 643 };
 644
 645 /* The C++ dialect being used. C++98 is the default.  */
 646 extern enum cxx_dialect cxx_dialect;
 647
 648 /* Maximum template instantiation depth.  This limit is rather
 649    arbitrary, but it exists to limit the time it takes to notice
 650    excessively recursive template instantiations.  */
 651
 652 extern int max_tinst_depth;
 653
 654 /* Nonzero means that we should not issue warnings about problems that
 655    occur when the code is executed, because the code being processed
 656    is not expected to be executed.  This is set during parsing.  This
 657    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 658    not a bool, because unexecuted expressions can nest.  */
 659
 660 extern int c_inhibit_evaluation_warnings;
 661
 662 /* Whether lexing has been completed, so subsequent preprocessor
 663    errors should use the compiler's input_location.  */
 664
 665 extern bool done_lexing;
 666
 667 /* C types are partitioned into three subsets: object, function, and
 668    incomplete types.  */
 669 #define C_TYPE_OBJECT_P(type) \
 670   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 671
 672 #define C_TYPE_INCOMPLETE_P(type) \
 673   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 674
 675 #define C_TYPE_FUNCTION_P(type) \
 676   (TREE_CODE (type) == FUNCTION_TYPE)
 677
 678 /* For convenience we define a single macro to identify the class of
 679    object or incomplete types.  */
 680 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 681   (!C_TYPE_FUNCTION_P (type))
 682
 683 struct visibility_flags
 684 {
 685   unsigned inpragma : 1;        /* True when in #pragma GCC visibility.  */
 686   unsigned inlines_hidden : 1;  /* True when -finlineshidden in effect.  */
 687 };
 688
 689 /* These enumerators are possible types of unsafe conversions.
 690    SAFE_CONVERSION The conversion is safe
 691    UNSAFE_OTHER Another type of conversion with problems
 692    UNSAFE_SIGN Conversion between signed and unsigned integers
 693     which are all warned about immediately, so this is unused
 694    UNSAFE_REAL Conversions that reduce the precision of reals
 695     including conversions from reals to integers
 696  */
 697 enum conversion_safety { SAFE_CONVERSION = 0, UNSAFE_OTHER, UNSAFE_SIGN, UNSAFE_REAL };
 698
 699 /* Global visibility options.  */
 700 extern struct visibility_flags visibility_options;
 701
 702 /* Attribute table common to the C front ends.  */
 703 extern const struct attribute_spec c_common_attribute_table[];
 704 extern const struct attribute_spec c_common_format_attribute_table[];
 705
 706 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 707    ID is the identifier to use, NAME is the string.
 708    TYPE_DEP indicates whether it depends on type of the function or not
 709    (i.e. __PRETTY_FUNCTION__).  */
 710
 711 extern tree (*make_fname_decl) (location_t, tree, int);
 712
 713 /* In c-decl.c and cp/tree.c.  FIXME.  */
 714 extern void c_register_addr_space (const char *str, addr_space_t as);
 715
 716 /* In c-common.c.  */
 717 extern bool in_late_binary_op;
 718 extern const char *c_addr_space_name (addr_space_t as);
 719 extern tree identifier_global_value (tree);
 720 extern tree c_linkage_bindings (tree);
 721 extern void record_builtin_type (enum rid, const char *, tree);
 722 extern tree build_void_list_node (void);
 723 extern void start_fname_decls (void);
 724 extern void finish_fname_decls (void);
 725 extern const char *fname_as_string (int);
 726 extern tree fname_decl (location_t, unsigned, tree);
 727
 728 extern int check_user_alignment (const_tree, bool);
 729 extern void check_function_arguments (const_tree, int, tree *);
 730 extern void check_function_arguments_recurse (void (*)
 731                                               (void *, tree,
 732                                                unsigned HOST_WIDE_INT),
 733                                               void *, tree,
 734                                               unsigned HOST_WIDE_INT);
 735 extern bool check_builtin_function_arguments (tree, int, tree *);
 736 extern void check_function_format (tree, int, tree *);
 737 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 738 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 739 extern bool attribute_takes_identifier_p (const_tree);
 740 extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
 741                                     const struct cl_option_handlers *);
 742 extern bool default_handle_c_option (size_t, const char *, int);
 743 extern tree c_common_type_for_mode (enum machine_mode, int);
 744 extern tree c_common_type_for_size (unsigned int, int);
 745 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 746                                                 int, int);
 747 extern tree c_common_unsigned_type (tree);
 748 extern tree c_common_signed_type (tree);
 749 extern tree c_common_signed_or_unsigned_type (int, tree);
 750 extern void c_common_init_ts (void);
 751 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 752 extern enum conversion_safety unsafe_conversion_p (tree, tree, bool);
 753 extern bool decl_with_nonnull_addr_p (const_tree);
 754 extern tree c_fully_fold (tree, bool, bool *);
 755 extern tree decl_constant_value_for_optimization (tree);
 756 extern tree c_wrap_maybe_const (tree, bool);
 757 extern tree c_save_expr (tree);
 758 extern tree c_common_truthvalue_conversion (location_t, tree);
 759 extern void c_apply_type_quals_to_decl (int, tree);
 760 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, bool, int);
 761 extern tree c_alignof_expr (location_t, tree);
 762 /* Print an error message for invalid operands to arith operation CODE.
 763    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 764 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 765 extern tree fix_string_type (tree);
 766 extern void constant_expression_warning (tree);
 767 extern void constant_expression_error (tree);
 768 extern bool strict_aliasing_warning (tree, tree, tree);
 769 extern void sizeof_pointer_memaccess_warning (location_t *, tree,
 770                                               vec<tree, va_gc> *, tree *,
 771                                               bool (*) (tree, tree));
 772 extern void warnings_for_convert_and_check (tree, tree, tree);
 773 extern tree convert_and_check (tree, tree);
 774 extern void overflow_warning (location_t, tree);
 775 extern bool warn_if_unused_value (const_tree, location_t);
 776 extern void warn_logical_operator (location_t, enum tree_code, tree,
 777                                    enum tree_code, tree, enum tree_code, tree);
 778 extern void check_main_parameter_types (tree decl);
 779 extern bool c_determine_visibility (tree);
 780 extern bool vector_types_compatible_elements_p (tree, tree);
 781 extern void mark_valid_location_for_stdc_pragma (bool);
 782 extern bool valid_location_for_stdc_pragma_p (void);
 783 extern void set_float_const_decimal64 (void);
 784 extern void clear_float_const_decimal64 (void);
 785 extern bool float_const_decimal64_p (void);
 786
 787 extern bool keyword_begins_type_specifier (enum rid);
 788 extern bool keyword_is_storage_class_specifier (enum rid);
 789 extern bool keyword_is_type_qualifier (enum rid);
 790 extern bool keyword_is_decl_specifier (enum rid);
 791 extern bool cxx_fundamental_alignment_p (unsigned);
 792
 793 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, false, 1)
 794 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, false, 1)
 795
 796 /* Subroutine of build_binary_op, used for certain operations.  */
 797 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 798
 799 /* Subroutine of build_binary_op, used for comparison operations.
 800    See if the operands have both been converted from subword integer types
 801    and, if so, perhaps change them both back to their original type.  */
 802 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 803
 804 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree,
 805                              bool = true);
 806
 807 /* Add qualifiers to a type, in the fashion for C.  */
 808 extern tree c_build_qualified_type (tree, int);
 809
 810 /* Build tree nodes and builtin functions common to both C and C++ language
 811    frontends.  */
 812 extern void c_common_nodes_and_builtins (void);
 813
 814 extern void disable_builtin_function (const char *);
 815
 816 extern void set_compound_literal_name (tree decl);
 817
 818 extern tree build_va_arg (location_t, tree, tree);
 819
 820 extern const unsigned int c_family_lang_mask;
 821 extern unsigned int c_common_option_lang_mask (void);
 822 extern void c_common_initialize_diagnostics (diagnostic_context *);
 823 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
 824 extern void c_common_init_options_struct (struct gcc_options *);
 825 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
 826 extern bool c_common_post_options (const char **);
 827 extern bool c_common_init (void);
 828 extern void c_common_finish (void);
 829 extern void c_common_parse_file (void);
 830 extern alias_set_type c_common_get_alias_set (tree);
 831 extern void c_register_builtin_type (tree, const char*);
 832 extern bool c_promoting_integer_type_p (const_tree);
 833 extern int self_promoting_args_p (const_tree);
 834 extern tree strip_pointer_operator (tree);
 835 extern tree strip_pointer_or_array_types (tree);
 836 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 837
 838 /* This is the basic parsing function.  */
 839 extern void c_parse_file (void);
 840
 841 extern void warn_for_omitted_condop (location_t, tree);
 842
 843 /* These macros provide convenient access to the various _STMT nodes.  */
 844
 845 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 846    if a statement expression.  */
 847 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 848   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 849
 850 /* Nonzero if a label has been added to the statement list.  */
 851 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 852   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 853
 854 /* C_MAYBE_CONST_EXPR accessors.  */
 855 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 856   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 857 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 858   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 859 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 860   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 861 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 862   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 863 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 864   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 865    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 866        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 867            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 868
 869 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 870 #define DECL_C_BIT_FIELD(NODE) \
 871   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 872 #define SET_DECL_C_BIT_FIELD(NODE) \
 873   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 874 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 875   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 876
 877 extern tree do_case (location_t, tree, tree);
 878 extern tree build_stmt (location_t, enum tree_code, ...);
 879 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
 880
 881 /* These functions must be defined by each front-end which implements
 882    a variant of the C language.  They are used in c-common.c.  */
 883
 884 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 885 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 886 extern tree perform_integral_promotions (tree);
 887
 888 /* These functions must be defined by each front-end which implements
 889    a variant of the C language.  They are used by port files.  */
 890
 891 extern tree default_conversion (tree);
 892
 893 /* Given two integer or real types, return the type for their sum.
 894    Given two compatible ANSI C types, returns the merged type.  */
 895
 896 extern tree common_type (tree, tree);
 897
 898 extern tree decl_constant_value (tree);
 899
 900 /* Handle increment and decrement of boolean types.  */
 901 extern tree boolean_increment (enum tree_code, tree);
 902
 903 extern int case_compare (splay_tree_key, splay_tree_key);
 904
 905 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 906
 907 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 908
 909 extern tree build_function_call (location_t, tree, tree);
 910
 911 extern tree build_function_call_vec (location_t, tree, vec<tree, va_gc> *,
 912                                      vec<tree, va_gc> *);
 913
 914 extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *);
 915
 916 extern tree finish_label_address_expr (tree, location_t);
 917
 918 /* Same function prototype, but the C and C++ front ends have
 919    different implementations.  Used in c-common.c.  */
 920 extern tree lookup_label (tree);
 921 extern tree lookup_name (tree);
 922 extern bool lvalue_p (const_tree);
 923
 924 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 925 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 926 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree, bool = true);
 927
 928 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 929
 930 extern void init_c_lex (void);
 931
 932 extern void c_cpp_builtins (cpp_reader *);
 933 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
 934 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
 935                          const char *, va_list *)
 936      ATTRIBUTE_GCC_DIAG(6,0);
 937
 938 extern bool parse_optimize_options (tree, bool);
 939
 940 /* Positive if an implicit `extern "C"' scope has just been entered;
 941    negative if such a scope has just been exited.  */
 942 extern GTY(()) int pending_lang_change;
 943
 944 /* Information recorded about each file examined during compilation.  */
 945
 946 struct c_fileinfo
 947 {
 948   int time;     /* Time spent in the file.  */
 949
 950   /* Flags used only by C++.
 951      INTERFACE_ONLY nonzero means that we are in an "interface" section
 952      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
 953      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
 954      INTERFACE_ONLY is zero, it means that we are responsible for
 955      exporting definitions that others might need.  */
 956   short interface_only;
 957   short interface_unknown;
 958 };
 959
 960 struct c_fileinfo *get_fileinfo (const char *);
 961 extern void dump_time_statistics (void);
 962
 963 extern bool c_dump_tree (void *, tree);
 964
 965 extern void verify_sequence_points (tree);
 966
 967 extern tree fold_offsetof_1 (tree);
 968 extern tree fold_offsetof (tree);
 969
 970 /* Places where an lvalue, or modifiable lvalue, may be required.
 971    Used to select diagnostic messages in lvalue_error and
 972    readonly_error.  */
 973 enum lvalue_use {
 974   lv_assign,
 975   lv_increment,
 976   lv_decrement,
 977   lv_addressof,
 978   lv_asm
 979 };
 980
 981 extern void readonly_error (location_t, tree, enum lvalue_use);
 982 extern void lvalue_error (location_t, enum lvalue_use);
 983 extern void invalid_indirection_error (location_t, tree, ref_operator);
 984
 985 extern int complete_array_type (tree *, tree, bool);
 986
 987 extern tree builtin_type_for_size (int, bool);
 988
 989 extern void c_common_mark_addressable_vec (tree);
 990
 991 extern void warn_array_subscript_with_type_char (tree);
 992 extern void warn_about_parentheses (location_t,
 993                                     enum tree_code,
 994                                     enum tree_code, tree,
 995                                     enum tree_code, tree);
 996 extern void warn_for_unused_label (tree label);
 997 extern void warn_for_div_by_zero (location_t, tree divisor);
 998 extern void warn_for_sign_compare (location_t,
 999                                    tree orig_op0, tree orig_op1,
1000                                    tree op0, tree op1,
1001                                    tree result_type,
1002                                    enum tree_code resultcode);
1003 extern void do_warn_double_promotion (tree, tree, tree, const char *,
1004                                       location_t);
1005 extern void set_underlying_type (tree);
1006 extern void record_locally_defined_typedef (tree);
1007 extern void maybe_record_typedef_use (tree);
1008 extern void maybe_warn_unused_local_typedefs (void);
1009 extern vec<tree, va_gc> *make_tree_vector (void);
1010 extern void release_tree_vector (vec<tree, va_gc> *);
1011 extern vec<tree, va_gc> *make_tree_vector_single (tree);
1012 extern vec<tree, va_gc> *make_tree_vector_from_list (tree);
1013 extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *);
1014
1015 /* In c-gimplify.c  */
1016 extern void c_genericize (tree);
1017 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1018 extern tree c_build_bind_expr (location_t, tree, tree);
1019
1020 /* In c-pch.c  */
1021 extern void pch_init (void);
1022 extern void pch_cpp_save_state (void);
1023 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1024 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1025                                const char *orig);
1026 extern void c_common_write_pch (void);
1027 extern void c_common_no_more_pch (void);
1028 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1029
1030 /* In *-checksum.c */
1031 extern const unsigned char executable_checksum[16];
1032
1033 /* In c-cppbuiltin.c  */
1034 extern void builtin_define_std (const char *macro);
1035 extern void builtin_define_with_value (const char *, const char *, int);
1036 extern void c_stddef_cpp_builtins (void);
1037 extern void fe_file_change (const struct line_map *);
1038 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1039
1040 /* In c-ppoutput.c  */
1041 extern void init_pp_output (FILE *);
1042 extern void preprocess_file (cpp_reader *);
1043 extern void pp_file_change (const struct line_map *);
1044 extern void pp_dir_change (cpp_reader *, const char *);
1045 extern bool check_missing_format_attribute (tree, tree);
1046
1047 /* In c-omp.c  */
1048 #if HOST_BITS_PER_WIDE_INT >= 64
1049 typedef unsigned HOST_WIDE_INT omp_clause_mask;
1050 # define OMP_CLAUSE_MASK_1 ((omp_clause_mask) 1)
1051 #else
1052 struct omp_clause_mask
1053 {
1054   inline omp_clause_mask ();
1055   inline omp_clause_mask (unsigned HOST_WIDE_INT l);
1056   inline omp_clause_mask (unsigned HOST_WIDE_INT l,
1057                           unsigned HOST_WIDE_INT h);
1058   inline omp_clause_mask &operator &= (omp_clause_mask);
1059   inline omp_clause_mask &operator |= (omp_clause_mask);
1060   inline omp_clause_mask operator ~ () const;
1061   inline omp_clause_mask operator & (omp_clause_mask) const;
1062   inline omp_clause_mask operator | (omp_clause_mask) const;
1063   inline omp_clause_mask operator >> (int);
1064   inline omp_clause_mask operator << (int);
1065   inline bool operator == (omp_clause_mask) const;
1066   inline bool operator != (omp_clause_mask) const;
1067   unsigned HOST_WIDE_INT low, high;
1068 };
1069
1070 inline
1071 omp_clause_mask::omp_clause_mask ()
1072 {
1073 }
1074
1075 inline
1076 omp_clause_mask::omp_clause_mask (unsigned HOST_WIDE_INT l)
1077 : low (l), high (0)
1078 {
1079 }
1080
1081 inline
1082 omp_clause_mask::omp_clause_mask (unsigned HOST_WIDE_INT l,
1083                                   unsigned HOST_WIDE_INT h)
1084 : low (l), high (h)
1085 {
1086 }
1087
1088 inline omp_clause_mask &
1089 omp_clause_mask::operator &= (omp_clause_mask b)
1090 {
1091   low &= b.low;
1092   high &= b.high;
1093   return *this;
1094 }
1095
1096 inline omp_clause_mask &
1097 omp_clause_mask::operator |= (omp_clause_mask b)
1098 {
1099   low |= b.low;
1100   high |= b.high;
1101   return *this;
1102 }
1103
1104 inline omp_clause_mask
1105 omp_clause_mask::operator ~ () const
1106 {
1107   omp_clause_mask ret (~low, ~high);
1108   return ret;
1109 }
1110
1111 inline omp_clause_mask
1112 omp_clause_mask::operator | (omp_clause_mask b) const
1113 {
1114   omp_clause_mask ret (low | b.low, high | b.high);
1115   return ret;
1116 }
1117
1118 inline omp_clause_mask
1119 omp_clause_mask::operator & (omp_clause_mask b) const
1120 {
1121   omp_clause_mask ret (low & b.low, high & b.high);
1122   return ret;
1123 }
1124
1125 inline omp_clause_mask
1126 omp_clause_mask::operator << (int amount)
1127 {
1128   omp_clause_mask ret;
1129   if (amount >= HOST_BITS_PER_WIDE_INT)
1130     {
1131       ret.low = 0;
1132       ret.high = low << (amount - HOST_BITS_PER_WIDE_INT);
1133     }
1134   else if (amount == 0)
1135     ret = *this;
1136   else
1137     {
1138       ret.low = low << amount;
1139       ret.high = (low >> (HOST_BITS_PER_WIDE_INT - amount))
1140                  | (high << amount);
1141     }
1142   return ret;
1143 }
1144
1145 inline omp_clause_mask
1146 omp_clause_mask::operator >> (int amount)
1147 {
1148   omp_clause_mask ret;
1149   if (amount >= HOST_BITS_PER_WIDE_INT)
1150     {
1151       ret.low = high >> (amount - HOST_BITS_PER_WIDE_INT);
1152       ret.high = 0;
1153     }
1154   else if (amount == 0)
1155     ret = *this;
1156   else
1157     {
1158       ret.low = (high << (HOST_BITS_PER_WIDE_INT - amount))
1159                  | (low >> amount);
1160       ret.high = high >> amount;
1161     }
1162   return ret;
1163 }
1164
1165 inline bool
1166 omp_clause_mask::operator == (omp_clause_mask b) const
1167 {
1168   return low == b.low && high == b.high;
1169 }
1170
1171 inline bool
1172 omp_clause_mask::operator != (omp_clause_mask b) const
1173 {
1174   return low != b.low || high != b.high;
1175 }
1176
1177 # define OMP_CLAUSE_MASK_1 omp_clause_mask (1)
1178 #endif
1179
1180 enum c_omp_clause_split
1181 {
1182   C_OMP_CLAUSE_SPLIT_TARGET = 0,
1183   C_OMP_CLAUSE_SPLIT_TEAMS,
1184   C_OMP_CLAUSE_SPLIT_DISTRIBUTE,
1185   C_OMP_CLAUSE_SPLIT_PARALLEL,
1186   C_OMP_CLAUSE_SPLIT_FOR,
1187   C_OMP_CLAUSE_SPLIT_SIMD,
1188   C_OMP_CLAUSE_SPLIT_COUNT,
1189   C_OMP_CLAUSE_SPLIT_SECTIONS = C_OMP_CLAUSE_SPLIT_FOR
1190 };
1191
1192 extern tree c_finish_omp_master (location_t, tree);
1193 extern tree c_finish_omp_taskgroup (location_t, tree);
1194 extern tree c_finish_omp_critical (location_t, tree, tree);
1195 extern tree c_finish_omp_ordered (location_t, tree);
1196 extern void c_finish_omp_barrier (location_t);
1197 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1198                                  tree, tree, tree, tree, tree, bool, bool);
1199 extern void c_finish_omp_flush (location_t);
1200 extern void c_finish_omp_taskwait (location_t);
1201 extern void c_finish_omp_taskyield (location_t);
1202 extern tree c_finish_omp_for (location_t, enum tree_code, tree, tree, tree,
1203                               tree, tree, tree);
1204 extern void c_omp_split_clauses (location_t, enum tree_code, omp_clause_mask,
1205                                  tree, tree *);
1206 extern tree c_omp_declare_simd_clauses_to_numbers (tree, tree);
1207 extern void c_omp_declare_simd_clauses_to_decls (tree, tree);
1208 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1209
1210 /* Not in c-omp.c; provided by the front end.  */
1211 extern bool c_omp_sharing_predetermined (tree);
1212 extern tree c_omp_remap_decl (tree, bool);
1213 extern void record_types_used_by_current_var_decl (tree);
1214
1215 /* Return next tree in the chain for chain_next walking of tree nodes.  */
1216 static inline tree
1217 c_tree_chain_next (tree t)
1218 {
1219   /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1220      kind of object, never a long chain of nodes.  Prefer
1221      TYPE_NEXT_VARIANT for types.  */
1222   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1223     return TYPE_NEXT_VARIANT (t);
1224   /* Otherwise, if there is TREE_CHAIN, return it.  */
1225   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1226     return TREE_CHAIN (t);
1227   return NULL;
1228 }
1229
1230 /* Mask used by tm_stmt_attr.  */
1231 #define TM_STMT_ATTR_OUTER      2
1232 #define TM_STMT_ATTR_ATOMIC     4
1233 #define TM_STMT_ATTR_RELAXED    8
1234
1235 extern int parse_tm_stmt_attr (tree, int);
1236
1237 /* Mask used by tm_attr_to_mask and tm_mask_to_attr.  Note that these
1238    are ordered specifically such that more restrictive attributes are
1239    at lower bit positions.  This fact is known by the C++ tm attribute
1240    inheritance code such that least bit extraction (mask & -mask) results
1241    in the most restrictive attribute.  */
1242 #define TM_ATTR_SAFE                    1
1243 #define TM_ATTR_CALLABLE                2
1244 #define TM_ATTR_PURE                    4
1245 #define TM_ATTR_IRREVOCABLE             8
1246 #define TM_ATTR_MAY_CANCEL_OUTER        16
1247
1248 extern int tm_attr_to_mask (tree);
1249 extern tree tm_mask_to_attr (int);
1250 extern tree find_tm_attribute (tree);
1251
1252 /* A suffix-identifier value doublet that represents user-defined literals
1253    for C++-0x.  */
1254 enum overflow_type {
1255   OT_UNDERFLOW = -1,
1256   OT_NONE,
1257   OT_OVERFLOW
1258 };
1259
1260 struct GTY(()) tree_userdef_literal {
1261   struct tree_base base;
1262   tree suffix_id;
1263   tree value;
1264   tree num_string;
1265   enum overflow_type overflow;
1266 };
1267
1268 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1269   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1270
1271 #define USERDEF_LITERAL_VALUE(NODE) \
1272   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1273
1274 #define USERDEF_LITERAL_OVERFLOW(NODE) \
1275   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow)
1276
1277 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1278   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1279
1280 #define USERDEF_LITERAL_TYPE(NODE) \
1281   (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1282
1283 extern tree build_userdef_literal (tree suffix_id, tree value,
1284                                    enum overflow_type overflow,
1285                                    tree num_string);
1286
1287 extern void convert_vector_to_pointer_for_subscript (location_t, tree*, tree);
1288
1289 /* Possibe cases of scalar_to_vector conversion.  */
1290 enum stv_conv {
1291   stv_error,        /* Error occurred.  */
1292   stv_nothing,      /* Nothing happened.  */
1293   stv_firstarg,     /* First argument must be expanded.  */
1294   stv_secondarg     /* Second argument must be expanded.  */
1295 };
1296
1297 extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code,
1298                                        tree op0, tree op1, bool);
1299
1300 /* In c-cilkplus.c  */
1301 extern tree c_finish_cilk_clauses (tree);
1302 extern tree c_validate_cilk_plus_loop (tree *, int *, void *);
1303 extern bool c_check_cilk_loop (location_t, tree);
1304
1305 /* These #defines allow users to access different operands of the
1306    array notation tree.  */
1307
1308 #define ARRAY_NOTATION_CHECK(NODE) TREE_CHECK (NODE, ARRAY_NOTATION_REF)
1309 #define ARRAY_NOTATION_ARRAY(NODE) \
1310   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 0)
1311 #define ARRAY_NOTATION_START(NODE) \
1312   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 1)
1313 #define ARRAY_NOTATION_LENGTH(NODE) \
1314   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 2)
1315 #define ARRAY_NOTATION_STRIDE(NODE) \
1316   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 3)
1317
1318 /* This structure holds all the scalar values and its appropriate variable
1319    replacment.  It is mainly used by the function that pulls all the invariant
1320    parts that should be executed only once, which comes with array notation
1321    expressions.  */
1322 struct inv_list
1323 {
1324   vec<tree, va_gc> *list_values;
1325   vec<tree, va_gc> *replacement;
1326   vec<enum tree_code, va_gc> *additional_tcodes;
1327 };
1328
1329 /* This structure holds all the important components that can be extracted
1330    from an ARRAY_NOTATION_REF expression.  It is used to pass array notation
1331    information between the functions that are responsible for expansion.  */
1332 typedef struct cilkplus_an_parts
1333 {
1334   tree value;
1335   tree start;
1336   tree length;
1337   tree stride;
1338   bool is_vector;
1339 } an_parts;
1340
1341 /* This structure holds the components necessary to create the loop around
1342    the ARRAY_REF that is created using the ARRAY_NOTATION information.  */
1343
1344 typedef struct cilkplus_an_loop_parts
1345 {
1346   tree var;         /* Loop induction variable.  */
1347   tree incr;        /* Loop increment/decrement expression.  */
1348   tree cmp;         /* Loop condition.  */
1349   tree ind_init;    /* Initialization of the loop induction variable.  */
1350 } an_loop_parts;
1351
1352 /* In array-notation-common.c.  */
1353 extern HOST_WIDE_INT extract_sec_implicit_index_arg (location_t, tree);
1354 extern bool is_sec_implicit_index_fn (tree);
1355 extern void array_notation_init_builtins (void);
1356 extern struct c_expr fix_array_notation_expr (location_t, enum tree_code,
1357                                               struct c_expr);
1358 extern bool contains_array_notation_expr (tree);
1359 extern tree expand_array_notation_exprs (tree);
1360 extern tree fix_conditional_array_notations (tree);
1361 extern tree find_correct_array_notation_type (tree);
1362 extern bool length_mismatch_in_expr_p (location_t, vec<vec<an_parts> >);
1363 extern enum built_in_function is_cilkplus_reduce_builtin (tree);
1364 extern bool find_rank (location_t, tree, tree, bool, size_t *);
1365 extern void extract_array_notation_exprs (tree, bool, vec<tree, va_gc> **);
1366 extern void replace_array_notations (tree *, bool, vec<tree, va_gc> *,
1367                                      vec<tree, va_gc> *);
1368 extern tree find_inv_trees (tree *, int *, void *);
1369 extern tree replace_inv_trees (tree *, int *, void *);
1370 extern tree find_correct_array_notation_type (tree op);
1371 extern void cilkplus_extract_an_triplets (vec<tree, va_gc> *, size_t, size_t,
1372                                           vec<vec<an_parts> > *);
1373 extern vec <tree, va_gc> *fix_sec_implicit_args
1374   (location_t, vec <tree, va_gc> *, vec<an_loop_parts>, size_t, tree);
1375
1376 /* In cilk.c.  */
1377 extern tree insert_cilk_frame (tree);
1378 extern void cilk_init_builtins (void);
1379 extern int gimplify_cilk_spawn (tree *);
1380 extern void cilk_install_body_with_frame_cleanup (tree, tree, void *);
1381 extern bool cilk_detect_spawn_and_unwrap (tree *);
1382 extern bool cilk_set_spawn_marker (location_t, tree);
1383 extern tree build_cilk_sync (void);
1384 extern tree build_cilk_spawn (location_t, tree);
1385 extern tree make_cilk_frame (tree);
1386 extern tree create_cilk_function_exit (tree, bool, bool);
1387 extern tree cilk_install_body_pedigree_operations (tree);
1388 extern void cilk_outline (tree, tree *, void *);
1389 #endif /* ! GCC_C_COMMON_H */