gcc/c-family/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002,
   3    2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011, 2012
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef GCC_C_COMMON_H
  23 #define GCC_C_COMMON_H
  24
  25 #include "splay-tree.h"
  26 #include "cpplib.h"
  27 #include "ggc.h"
  28 #include "tree.h"
  29
  30 /* In order for the format checking to accept the C frontend
  31    diagnostic framework extensions, you must include this file before
  32    diagnostic-core.h, not after.  The C front end formats are a subset of those
  33    for C++, so they are the appropriate set to use in common code;
  34    cp-tree.h overrides this for C++.  */
  35 #if defined(GCC_DIAGNOSTIC_CORE_H)
  36 #error \
  37 In order for the format checking to accept the C front end diagnostic \
  38 framework extensions, you must include this file before diagnostic-core.h \
  39 never after.
  40 #endif
  41 #ifndef GCC_DIAG_STYLE
  42 #define GCC_DIAG_STYLE __gcc_cdiag__
  43 #endif
  44 #include "diagnostic-core.h"
  45
  46 /* Usage of TREE_LANG_FLAG_?:
  47    0: IDENTIFIER_MARKED (used by search routines).
  48       C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
  49    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  50       STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
  51       C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
  52    2: unused
  53    3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
  54    4: unused
  55 */
  56
  57 /* Reserved identifiers.  This is the union of all the keywords for C,
  58    C++, and Objective-C.  All the type modifiers have to be in one
  59    block at the beginning, because they are used as mask bits.  There
  60    are 28 type modifiers; if we add many more we will have to redesign
  61    the mask mechanism.  */
  62
  63 enum rid
  64 {
  65   /* Modifiers: */
  66   /* C, in empirical order of frequency.  */
  67   RID_STATIC = 0,
  68   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  69   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  70   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  71   RID_NORETURN,
  72
  73   /* C extensions */
  74   RID_COMPLEX, RID_THREAD, RID_SAT,
  75
  76   /* C++ */
  77   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  78
  79   /* ObjC ("PQ" reserved words - they do not appear after a '@' and
  80      are keywords only in specific contexts)  */
  81   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  82
  83   /* ObjC ("PATTR" reserved words - they do not appear after a '@'
  84      and are keywords only as property attributes)  */
  85   RID_GETTER, RID_SETTER,
  86   RID_READONLY, RID_READWRITE,
  87   RID_ASSIGN, RID_RETAIN, RID_COPY,
  88   RID_NONATOMIC,
  89
  90   /* C (reserved and imaginary types not implemented, so any use is a
  91      syntax error) */
  92   RID_IMAGINARY,
  93
  94   /* C */
  95   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  96   RID_INT128,
  97   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  98   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  99   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
 100   RID_SIZEOF,
 101
 102   /* C extensions */
 103   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
 104   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
 105   RID_TYPES_COMPATIBLE_P,      RID_BUILTIN_COMPLEX,          RID_BUILTIN_SHUFFLE,
 106   RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
 107   RID_FRACT, RID_ACCUM,
 108
 109   /* C11 */
 110   RID_ALIGNAS,
 111
 112   /* This means to warn that this is a C++ keyword, and then treat it
 113      as a normal identifier.  */
 114   RID_CXX_COMPAT_WARN,
 115
 116   /* GNU transactional memory extension */
 117   RID_TRANSACTION_ATOMIC, RID_TRANSACTION_RELAXED, RID_TRANSACTION_CANCEL,
 118
 119   /* Too many ways of getting the name of a function as a string */
 120   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
 121
 122   /* C++ (some of these are keywords in Objective-C as well, but only
 123      if they appear after a '@') */
 124   RID_BOOL,     RID_WCHAR,    RID_CLASS,
 125   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
 126   RID_TEMPLATE, RID_NULL,     RID_CATCH,
 127   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
 128   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
 129   RID_THIS,     RID_THROW,    RID_TRUE,
 130   RID_TRY,      RID_TYPENAME, RID_TYPEID,
 131   RID_USING,    RID_CHAR16,   RID_CHAR32,
 132
 133   /* casts */
 134   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
 135
 136   /* C++ extensions */
 137   RID_BASES,                   RID_DIRECT_BASES,
 138   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 139   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 140   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 141   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
 142   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 143   RID_IS_CLASS,                RID_IS_CONVERTIBLE_TO,
 144   RID_IS_EMPTY,                RID_IS_ENUM,
 145   RID_IS_FINAL,                RID_IS_LITERAL_TYPE,
 146   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 147   RID_IS_STD_LAYOUT,           RID_IS_TRIVIAL,
 148   RID_IS_UNION,                RID_UNDERLYING_TYPE,
 149
 150   /* C++11 */
 151   RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
 152
 153   /* Objective-C ("AT" reserved words - they are only keywords when
 154      they follow '@')  */
 155   RID_AT_ENCODE,   RID_AT_END,
 156   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 157   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,  RID_AT_PACKAGE,
 158   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 159   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 160   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 161   RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
 162   RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
 163   RID_AT_INTERFACE,
 164   RID_AT_IMPLEMENTATION,
 165
 166   /* Named address support, mapping the keyword to a particular named address
 167      number.  Named address space 0 is reserved for the generic address.  If
 168      there are more than 254 named addresses, the addr_space_t type will need
 169      to be grown from an unsigned char to unsigned short.  */
 170   RID_ADDR_SPACE_0,             /* generic address */
 171   RID_ADDR_SPACE_1,
 172   RID_ADDR_SPACE_2,
 173   RID_ADDR_SPACE_3,
 174   RID_ADDR_SPACE_4,
 175   RID_ADDR_SPACE_5,
 176   RID_ADDR_SPACE_6,
 177   RID_ADDR_SPACE_7,
 178   RID_ADDR_SPACE_8,
 179   RID_ADDR_SPACE_9,
 180   RID_ADDR_SPACE_10,
 181   RID_ADDR_SPACE_11,
 182   RID_ADDR_SPACE_12,
 183   RID_ADDR_SPACE_13,
 184   RID_ADDR_SPACE_14,
 185   RID_ADDR_SPACE_15,
 186
 187   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 188   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 189
 190   RID_MAX,
 191
 192   RID_FIRST_MODIFIER = RID_STATIC,
 193   RID_LAST_MODIFIER = RID_ONEWAY,
 194
 195   RID_FIRST_CXX0X = RID_CONSTEXPR,
 196   RID_LAST_CXX0X = RID_STATIC_ASSERT,
 197   RID_FIRST_AT = RID_AT_ENCODE,
 198   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 199   RID_FIRST_PQ = RID_IN,
 200   RID_LAST_PQ = RID_ONEWAY,
 201   RID_FIRST_PATTR = RID_GETTER,
 202   RID_LAST_PATTR = RID_NONATOMIC
 203 };
 204
 205 #define OBJC_IS_AT_KEYWORD(rid) \
 206   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 207    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 208
 209 #define OBJC_IS_PQ_KEYWORD(rid) \
 210   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 211    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 212
 213 #define OBJC_IS_PATTR_KEYWORD(rid) \
 214   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
 215    (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
 216
 217 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
 218    'class') which are shared in a subtle way between Objective-C and
 219    C++.  When the lexer is lexing in Objective-C/Objective-C++, if it
 220    finds '@' followed by one of these identifiers (eg, '@class'), it
 221    recognizes the whole as an Objective-C keyword.  If the identifier
 222    is found elsewhere, it follows the rules of the C/C++ language.
 223  */
 224 #define OBJC_IS_CXX_KEYWORD(rid) \
 225   (rid == RID_CLASS                                                     \
 226    || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE   \
 227    || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
 228
 229 /* The elements of `ridpointers' are identifier nodes for the reserved
 230    type names and storage classes.  It is indexed by a RID_... value.  */
 231 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 232
 233 /* Standard named or nameless data types of the C compiler.  */
 234
 235 enum c_tree_index
 236 {
 237     CTI_CHAR16_TYPE,
 238     CTI_CHAR32_TYPE,
 239     CTI_WCHAR_TYPE,
 240     CTI_UNDERLYING_WCHAR_TYPE,
 241     CTI_WINT_TYPE,
 242     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 243     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 244     CTI_INTMAX_TYPE,
 245     CTI_UINTMAX_TYPE,
 246     CTI_WIDEST_INT_LIT_TYPE,
 247     CTI_WIDEST_UINT_LIT_TYPE,
 248
 249     /* Types for <stdint.h>, that may not be defined on all
 250        targets.  */
 251     CTI_SIG_ATOMIC_TYPE,
 252     CTI_INT8_TYPE,
 253     CTI_INT16_TYPE,
 254     CTI_INT32_TYPE,
 255     CTI_INT64_TYPE,
 256     CTI_UINT8_TYPE,
 257     CTI_UINT16_TYPE,
 258     CTI_UINT32_TYPE,
 259     CTI_UINT64_TYPE,
 260     CTI_INT_LEAST8_TYPE,
 261     CTI_INT_LEAST16_TYPE,
 262     CTI_INT_LEAST32_TYPE,
 263     CTI_INT_LEAST64_TYPE,
 264     CTI_UINT_LEAST8_TYPE,
 265     CTI_UINT_LEAST16_TYPE,
 266     CTI_UINT_LEAST32_TYPE,
 267     CTI_UINT_LEAST64_TYPE,
 268     CTI_INT_FAST8_TYPE,
 269     CTI_INT_FAST16_TYPE,
 270     CTI_INT_FAST32_TYPE,
 271     CTI_INT_FAST64_TYPE,
 272     CTI_UINT_FAST8_TYPE,
 273     CTI_UINT_FAST16_TYPE,
 274     CTI_UINT_FAST32_TYPE,
 275     CTI_UINT_FAST64_TYPE,
 276     CTI_INTPTR_TYPE,
 277     CTI_UINTPTR_TYPE,
 278
 279     CTI_CHAR_ARRAY_TYPE,
 280     CTI_CHAR16_ARRAY_TYPE,
 281     CTI_CHAR32_ARRAY_TYPE,
 282     CTI_WCHAR_ARRAY_TYPE,
 283     CTI_INT_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 int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 424 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 425 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 426
 427 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 428
 429 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 430 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 431 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 432 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 433
 434 /* A node for `((void) 0)'.  */
 435 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 436
 437 /* The node for C++ `__null'.  */
 438 #define null_node                       c_global_trees[CTI_NULL]
 439
 440 extern GTY(()) tree c_global_trees[CTI_MAX];
 441
 442 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 443    tree for size reasons.  */
 444 struct GTY((variable_size)) sorted_fields_type {
 445   int len;
 446   tree GTY((length ("%h.len"))) elts[1];
 447 };
 448
 449 /* Mark which labels are explicitly declared.
 450    These may be shadowed, and may be referenced from nested functions.  */
 451 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 452
 453 typedef enum c_language_kind
 454 {
 455   clk_c         = 0,            /* C90, C94 or C99 */
 456   clk_objc      = 1,            /* clk_c with ObjC features.  */
 457   clk_cxx       = 2,            /* ANSI/ISO C++ */
 458   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 459 }
 460 c_language_kind;
 461
 462 /* To test for a specific language use c_language, defined by each
 463    front end.  For "ObjC features" or "not C++" use the macros.  */
 464 extern c_language_kind c_language;
 465
 466 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 467 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 468
 469 /* The various name of operator that appears in error messages. */
 470 typedef enum ref_operator {
 471   /* NULL */
 472   RO_NULL,
 473   /* array indexing */
 474   RO_ARRAY_INDEXING,
 475   /* unary * */
 476   RO_UNARY_STAR,
 477   /* -> */
 478   RO_ARROW,
 479   /* implicit conversion */
 480   RO_IMPLICIT_CONVERSION
 481 } ref_operator;
 482
 483 /* Information about a statement tree.  */
 484
 485 struct GTY(()) stmt_tree_s {
 486   /* A stack of statement lists being collected.  */
 487   VEC(tree,gc) *x_cur_stmt_list;
 488
 489   /* In C++, Nonzero if we should treat statements as full
 490      expressions.  In particular, this variable is non-zero if at the
 491      end of a statement we should destroy any temporaries created
 492      during that statement.  Similarly, if, at the end of a block, we
 493      should destroy any local variables in this block.  Normally, this
 494      variable is nonzero, since those are the normal semantics of
 495      C++.
 496
 497      This flag has no effect in C.  */
 498   int stmts_are_full_exprs_p;
 499 };
 500
 501 typedef struct stmt_tree_s *stmt_tree;
 502
 503 /* Global state pertinent to the current function.  Some C dialects
 504    extend this structure with additional fields.  */
 505
 506 struct GTY(()) c_language_function {
 507   /* While we are parsing the function, this contains information
 508      about the statement-tree that we are building.  */
 509   struct stmt_tree_s x_stmt_tree;
 510
 511   /* Vector of locally defined typedefs, for
 512      -Wunused-local-typedefs.  */
 513   VEC(tree,gc) *local_typedefs;
 514 };
 515
 516 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
 517
 518 /* When building a statement-tree, this is the current statement list
 519    being collected.  We define it in this convoluted way, rather than
 520    using VEC_last, because it must be an lvalue.  */
 521
 522 #define cur_stmt_list                                                   \
 523   (*(VEC_address (tree, stmt_list_stack)                                \
 524      + VEC_length (tree, stmt_list_stack) - 1))
 525
 526 #define building_stmt_list_p() (!VEC_empty (tree, stmt_list_stack))
 527
 528 /* Language-specific hooks.  */
 529
 530 /* If non-NULL, this function is called after a precompile header file
 531    is loaded.  */
 532 extern void (*lang_post_pch_load) (void);
 533
 534 extern void push_file_scope (void);
 535 extern void pop_file_scope (void);
 536 extern stmt_tree current_stmt_tree (void);
 537 extern tree push_stmt_list (void);
 538 extern tree pop_stmt_list (tree);
 539 extern tree add_stmt (tree);
 540 extern void push_cleanup (tree, tree, bool);
 541 extern tree pushdecl_top_level (tree);
 542 extern tree pushdecl (tree);
 543 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 544                                location_t, 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 /* Warn about #pragma directives that are not recognized.  */
 587
 588 extern int warn_unknown_pragmas; /* Tri state variable.  */
 589
 590 /* Warn about format/argument anomalies in calls to formatted I/O functions
 591    (*printf, *scanf, strftime, strfmon, etc.).  */
 592
 593 extern int warn_format;
 594
 595
 596 /* C/ObjC language option variables.  */
 597
 598
 599 /* Nonzero means allow type mismatches in conditional expressions;
 600    just make their values `void'.  */
 601
 602 extern int flag_cond_mismatch;
 603
 604 /* Nonzero means enable C89 Amendment 1 features.  */
 605
 606 extern int flag_isoc94;
 607
 608 /* Nonzero means use the ISO C99 (or C11) dialect of C.  */
 609
 610 extern int flag_isoc99;
 611
 612 /* Nonzero means use the ISO C11 dialect of C.  */
 613
 614 extern int flag_isoc11;
 615
 616 /* Nonzero means that we have builtin functions, and main is an int.  */
 617
 618 extern int flag_hosted;
 619
 620 /* ObjC language option variables.  */
 621
 622
 623 /* Tells the compiler that this is a special run.  Do not perform any
 624    compiling, instead we are to test some platform dependent features
 625    and output a C header file with appropriate definitions.  */
 626
 627 extern int print_struct_values;
 628
 629 /* Tells the compiler what is the constant string class for ObjC.  */
 630
 631 extern const char *constant_string_class_name;
 632
 633
 634 /* C++ language option variables.  */
 635
 636
 637 /* Nonzero means generate separate instantiation control files and
 638    juggle them at link time.  */
 639
 640 extern int flag_use_repository;
 641
 642 /* The supported C++ dialects.  */
 643
 644 enum cxx_dialect {
 645   /* C++98 with TC1  */
 646   cxx98,
 647   cxx03 = cxx98,
 648   /* C++11  */
 649   cxx0x,
 650   cxx11 = cxx0x,
 651   /* C++1y (C++17?) */
 652   cxx1y
 653 };
 654
 655 /* The C++ dialect being used. C++98 is the default.  */
 656 extern enum cxx_dialect cxx_dialect;
 657
 658 /* Maximum template instantiation depth.  This limit is rather
 659    arbitrary, but it exists to limit the time it takes to notice
 660    excessively recursive template instantiations.  */
 661
 662 extern int max_tinst_depth;
 663
 664 /* Nonzero means that we should not issue warnings about problems that
 665    occur when the code is executed, because the code being processed
 666    is not expected to be executed.  This is set during parsing.  This
 667    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 668    not a bool, because unexecuted expressions can nest.  */
 669
 670 extern int c_inhibit_evaluation_warnings;
 671
 672 /* Whether lexing has been completed, so subsequent preprocessor
 673    errors should use the compiler's input_location.  */
 674
 675 extern bool done_lexing;
 676
 677 /* C types are partitioned into three subsets: object, function, and
 678    incomplete types.  */
 679 #define C_TYPE_OBJECT_P(type) \
 680   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 681
 682 #define C_TYPE_INCOMPLETE_P(type) \
 683   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 684
 685 #define C_TYPE_FUNCTION_P(type) \
 686   (TREE_CODE (type) == FUNCTION_TYPE)
 687
 688 /* For convenience we define a single macro to identify the class of
 689    object or incomplete types.  */
 690 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 691   (!C_TYPE_FUNCTION_P (type))
 692
 693 struct visibility_flags
 694 {
 695   unsigned inpragma : 1;        /* True when in #pragma GCC visibility.  */
 696   unsigned inlines_hidden : 1;  /* True when -finlineshidden in effect.  */
 697 };
 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 void set_Wformat (int);
 738 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 739 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 740 extern bool attribute_takes_identifier_p (const_tree);
 741 extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
 742                                     const struct cl_option_handlers *);
 743 extern bool default_handle_c_option (size_t, const char *, int);
 744 extern tree c_common_type_for_mode (enum machine_mode, int);
 745 extern tree c_common_type_for_size (unsigned int, int);
 746 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 747                                                 int, int);
 748 extern tree c_common_unsigned_type (tree);
 749 extern tree c_common_signed_type (tree);
 750 extern tree c_common_signed_or_unsigned_type (int, tree);
 751 extern void c_common_init_ts (void);
 752 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 753 extern bool unsafe_conversion_p (tree, tree, bool);
 754 extern bool decl_with_nonnull_addr_p (const_tree);
 755 extern tree c_fully_fold (tree, bool, bool *);
 756 extern tree decl_constant_value_for_optimization (tree);
 757 extern tree c_wrap_maybe_const (tree, bool);
 758 extern tree c_save_expr (tree);
 759 extern tree c_common_truthvalue_conversion (location_t, tree);
 760 extern void c_apply_type_quals_to_decl (int, tree);
 761 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
 762 extern tree c_alignof_expr (location_t, tree);
 763 /* Print an error message for invalid operands to arith operation CODE.
 764    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 765 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 766 extern tree fix_string_type (tree);
 767 extern void constant_expression_warning (tree);
 768 extern void constant_expression_error (tree);
 769 extern bool strict_aliasing_warning (tree, tree, tree);
 770 extern void sizeof_pointer_memaccess_warning (location_t, tree,
 771                                               VEC(tree, gc) *, tree,
 772                                               bool (*) (tree, tree));
 773 extern void warnings_for_convert_and_check (tree, tree, tree);
 774 extern tree convert_and_check (tree, tree);
 775 extern void overflow_warning (location_t, tree);
 776 extern bool warn_if_unused_value (const_tree, location_t);
 777 extern void warn_logical_operator (location_t, enum tree_code, tree,
 778                                    enum tree_code, tree, enum tree_code, tree);
 779 extern void check_main_parameter_types (tree decl);
 780 extern bool c_determine_visibility (tree);
 781 extern bool same_scalar_type_ignoring_signedness (tree, tree);
 782 extern void mark_valid_location_for_stdc_pragma (bool);
 783 extern bool valid_location_for_stdc_pragma_p (void);
 784 extern void set_float_const_decimal64 (void);
 785 extern void clear_float_const_decimal64 (void);
 786 extern bool float_const_decimal64_p (void);
 787
 788 extern bool keyword_begins_type_specifier (enum rid);
 789 extern bool keyword_is_storage_class_specifier (enum rid);
 790 extern bool keyword_is_type_qualifier (enum rid);
 791 extern bool keyword_is_decl_specifier (enum rid);
 792
 793 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, 1)
 794 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, 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
 806 /* Add qualifiers to a type, in the fashion for C.  */
 807 extern tree c_build_qualified_type (tree, int);
 808
 809 /* Build tree nodes and builtin functions common to both C and C++ language
 810    frontends.  */
 811 extern void c_common_nodes_and_builtins (void);
 812
 813 extern void disable_builtin_function (const char *);
 814
 815 extern void set_compound_literal_name (tree decl);
 816
 817 extern tree build_va_arg (location_t, tree, tree);
 818
 819 extern const unsigned int c_family_lang_mask;
 820 extern unsigned int c_common_option_lang_mask (void);
 821 extern void c_common_initialize_diagnostics (diagnostic_context *);
 822 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
 823 extern void c_common_init_options_struct (struct gcc_options *);
 824 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
 825 extern bool c_common_post_options (const char **);
 826 extern bool c_common_init (void);
 827 extern void c_common_finish (void);
 828 extern void c_common_parse_file (void);
 829 extern alias_set_type c_common_get_alias_set (tree);
 830 extern void c_register_builtin_type (tree, const char*);
 831 extern bool c_promoting_integer_type_p (const_tree);
 832 extern int self_promoting_args_p (const_tree);
 833 extern tree strip_pointer_operator (tree);
 834 extern tree strip_pointer_or_array_types (tree);
 835 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 836
 837 /* This is the basic parsing function.  */
 838 extern void c_parse_file (void);
 839
 840 extern void warn_for_omitted_condop (location_t, tree);
 841
 842 /* These macros provide convenient access to the various _STMT nodes.  */
 843
 844 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 845    if a statement expression.  */
 846 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 847   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 848
 849 /* Nonzero if a label has been added to the statement list.  */
 850 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 851   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 852
 853 /* C_MAYBE_CONST_EXPR accessors.  */
 854 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 855   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 856 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 857   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 858 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 859   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 860 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 861   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 862 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 863   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 864    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 865        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 866            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 867
 868 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 869 #define DECL_C_BIT_FIELD(NODE) \
 870   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 871 #define SET_DECL_C_BIT_FIELD(NODE) \
 872   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 873 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 874   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 875
 876 extern tree do_case (location_t, tree, tree);
 877 extern tree build_stmt (location_t, enum tree_code, ...);
 878 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
 879
 880 /* These functions must be defined by each front-end which implements
 881    a variant of the C language.  They are used in c-common.c.  */
 882
 883 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 884 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 885 extern tree perform_integral_promotions (tree);
 886
 887 /* These functions must be defined by each front-end which implements
 888    a variant of the C language.  They are used by port files.  */
 889
 890 extern tree default_conversion (tree);
 891
 892 /* Given two integer or real types, return the type for their sum.
 893    Given two compatible ANSI C types, returns the merged type.  */
 894
 895 extern tree common_type (tree, tree);
 896
 897 extern tree decl_constant_value (tree);
 898
 899 /* Handle increment and decrement of boolean types.  */
 900 extern tree boolean_increment (enum tree_code, tree);
 901
 902 extern int case_compare (splay_tree_key, splay_tree_key);
 903
 904 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 905
 906 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 907
 908 extern tree build_function_call (location_t, tree, tree);
 909
 910 extern tree build_function_call_vec (location_t, tree,
 911                                      VEC(tree,gc) *, VEC(tree,gc) *);
 912
 913 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
 914
 915 extern tree finish_label_address_expr (tree, location_t);
 916
 917 /* Same function prototype, but the C and C++ front ends have
 918    different implementations.  Used in c-common.c.  */
 919 extern tree lookup_label (tree);
 920 extern tree lookup_name (tree);
 921 extern bool lvalue_p (const_tree);
 922
 923 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 924 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 925 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree);
 926
 927 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 928
 929 extern void init_c_lex (void);
 930
 931 extern void c_cpp_builtins (cpp_reader *);
 932 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
 933 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
 934                          const char *, va_list *)
 935      ATTRIBUTE_GCC_DIAG(6,0);
 936
 937 extern bool parse_optimize_options (tree, bool);
 938
 939 /* Positive if an implicit `extern "C"' scope has just been entered;
 940    negative if such a scope has just been exited.  */
 941 extern GTY(()) int pending_lang_change;
 942
 943 /* Information recorded about each file examined during compilation.  */
 944
 945 struct c_fileinfo
 946 {
 947   int time;     /* Time spent in the file.  */
 948
 949   /* Flags used only by C++.
 950      INTERFACE_ONLY nonzero means that we are in an "interface" section
 951      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
 952      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
 953      INTERFACE_ONLY is zero, it means that we are responsible for
 954      exporting definitions that others might need.  */
 955   short interface_only;
 956   short interface_unknown;
 957 };
 958
 959 struct c_fileinfo *get_fileinfo (const char *);
 960 extern void dump_time_statistics (void);
 961
 962 extern bool c_dump_tree (void *, tree);
 963
 964 extern void verify_sequence_points (tree);
 965
 966 extern tree fold_offsetof_1 (tree);
 967 extern tree fold_offsetof (tree);
 968
 969 /* Places where an lvalue, or modifiable lvalue, may be required.
 970    Used to select diagnostic messages in lvalue_error and
 971    readonly_error.  */
 972 enum lvalue_use {
 973   lv_assign,
 974   lv_increment,
 975   lv_decrement,
 976   lv_addressof,
 977   lv_asm
 978 };
 979
 980 extern void readonly_error (tree, enum lvalue_use);
 981 extern void lvalue_error (location_t, enum lvalue_use);
 982 extern void invalid_indirection_error (location_t, tree, ref_operator);
 983
 984 extern int complete_array_type (tree *, tree, bool);
 985
 986 extern tree builtin_type_for_size (int, bool);
 987
 988 extern void c_common_mark_addressable_vec (tree);
 989
 990 extern void warn_array_subscript_with_type_char (tree);
 991 extern void warn_about_parentheses (enum tree_code,
 992                                     enum tree_code, tree,
 993                                     enum tree_code, tree);
 994 extern void warn_for_unused_label (tree label);
 995 extern void warn_for_div_by_zero (location_t, tree divisor);
 996 extern void warn_for_sign_compare (location_t,
 997                                    tree orig_op0, tree orig_op1,
 998                                    tree op0, tree op1,
 999                                    tree result_type,
1000                                    enum tree_code resultcode);
1001 extern void do_warn_double_promotion (tree, tree, tree, const char *,
1002                                       location_t);
1003 extern void set_underlying_type (tree);
1004 extern void record_locally_defined_typedef (tree);
1005 extern void maybe_record_typedef_use (tree);
1006 extern void maybe_warn_unused_local_typedefs (void);
1007 extern VEC(tree,gc) *make_tree_vector (void);
1008 extern void release_tree_vector (VEC(tree,gc) *);
1009 extern VEC(tree,gc) *make_tree_vector_single (tree);
1010 extern VEC(tree,gc) *make_tree_vector_from_list (tree);
1011 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
1012
1013 /* In c-gimplify.c  */
1014 extern void c_genericize (tree);
1015 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1016 extern tree c_build_bind_expr (location_t, tree, tree);
1017
1018 /* In c-pch.c  */
1019 extern void pch_init (void);
1020 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1021 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1022                                const char *orig);
1023 extern void c_common_write_pch (void);
1024 extern void c_common_no_more_pch (void);
1025 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1026
1027 /* In *-checksum.c */
1028 extern const unsigned char executable_checksum[16];
1029
1030 /* In c-cppbuiltin.c  */
1031 extern void builtin_define_std (const char *macro);
1032 extern void builtin_define_with_value (const char *, const char *, int);
1033 extern void c_stddef_cpp_builtins (void);
1034 extern void fe_file_change (const struct line_map *);
1035 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1036
1037 /* In c-ppoutput.c  */
1038 extern void init_pp_output (FILE *);
1039 extern void preprocess_file (cpp_reader *);
1040 extern void pp_file_change (const struct line_map *);
1041 extern void pp_dir_change (cpp_reader *, const char *);
1042 extern bool check_missing_format_attribute (tree, tree);
1043
1044 /* In c-omp.c  */
1045 extern tree c_finish_omp_master (location_t, tree);
1046 extern tree c_finish_omp_critical (location_t, tree, tree);
1047 extern tree c_finish_omp_ordered (location_t, tree);
1048 extern void c_finish_omp_barrier (location_t);
1049 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1050                                  tree, tree, tree, tree, tree);
1051 extern void c_finish_omp_flush (location_t);
1052 extern void c_finish_omp_taskwait (location_t);
1053 extern void c_finish_omp_taskyield (location_t);
1054 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1055 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1056 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1057
1058 /* Not in c-omp.c; provided by the front end.  */
1059 extern bool c_omp_sharing_predetermined (tree);
1060 extern tree c_omp_remap_decl (tree, bool);
1061 extern void record_types_used_by_current_var_decl (tree);
1062
1063 /* Return next tree in the chain for chain_next walking of tree nodes.  */
1064 static inline tree
1065 c_tree_chain_next (tree t)
1066 {
1067   /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1068      kind of object, never a long chain of nodes.  Prefer
1069      TYPE_NEXT_VARIANT for types.  */
1070   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1071     return TYPE_NEXT_VARIANT (t);
1072   /* Otherwise, if there is TREE_CHAIN, return it.  */
1073   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1074     return TREE_CHAIN (t);
1075   return NULL;
1076 }
1077
1078 /* Mask used by tm_stmt_attr.  */
1079 #define TM_STMT_ATTR_OUTER      2
1080 #define TM_STMT_ATTR_ATOMIC     4
1081 #define TM_STMT_ATTR_RELAXED    8
1082
1083 extern int parse_tm_stmt_attr (tree, int);
1084
1085 /* Mask used by tm_attr_to_mask and tm_mask_to_attr.  Note that these
1086    are ordered specifically such that more restrictive attributes are
1087    at lower bit positions.  This fact is known by the C++ tm attribute
1088    inheritance code such that least bit extraction (mask & -mask) results
1089    in the most restrictive attribute.  */
1090 #define TM_ATTR_SAFE                    1
1091 #define TM_ATTR_CALLABLE                2
1092 #define TM_ATTR_PURE                    4
1093 #define TM_ATTR_IRREVOCABLE             8
1094 #define TM_ATTR_MAY_CANCEL_OUTER        16
1095
1096 extern int tm_attr_to_mask (tree);
1097 extern tree tm_mask_to_attr (int);
1098 extern tree find_tm_attribute (tree);
1099
1100 /* A suffix-identifier value doublet that represents user-defined literals
1101    for C++-0x.  */
1102 struct GTY(()) tree_userdef_literal {
1103   struct tree_base base;
1104   tree suffix_id;
1105   tree value;
1106   tree num_string;
1107 };
1108
1109 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1110   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1111
1112 #define USERDEF_LITERAL_VALUE(NODE) \
1113   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1114
1115 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1116   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1117
1118 #define USERDEF_LITERAL_TYPE(NODE) \
1119   (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1120
1121 extern tree build_userdef_literal (tree suffix_id, tree value, tree num_string);
1122
1123 extern void convert_vector_to_pointer_for_subscript (location_t, tree*, tree);
1124
1125 #endif /* ! GCC_C_COMMON_H */