gcc/c-family/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
   3    1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
   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
  29 /* In order for the format checking to accept the C frontend
  30    diagnostic framework extensions, you must include this file before
  31    diagnostic-core.h, not after.  The C front end formats are a subset of those
  32    for C++, so they are the appropriate set to use in common code;
  33    cp-tree.h overrides this for C++.  */
  34 #if defined(GCC_DIAGNOSTIC_CORE_H)
  35 #error \
  36 In order for the format checking to accept the C front end diagnostic \
  37 framework extensions, you must include this file before diagnostic-core.h \
  38 never after.
  39 #endif
  40 #ifndef GCC_DIAG_STYLE
  41 #define GCC_DIAG_STYLE __gcc_cdiag__
  42 #endif
  43 #include "diagnostic-core.h"
  44
  45 /* Usage of TREE_LANG_FLAG_?:
  46    0: TREE_NEGATED_INT (in INTEGER_CST).
  47       IDENTIFIER_MARKED (used by search routines).
  48       DECL_PRETTY_FUNCTION_P (in VAR_DECL)
  49       C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
  50    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  51       STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
  52       C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
  53    2: unused
  54    3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
  55    4: unused
  56 */
  57
  58 /* Reserved identifiers.  This is the union of all the keywords for C,
  59    C++, and Objective-C.  All the type modifiers have to be in one
  60    block at the beginning, because they are used as mask bits.  There
  61    are 27 type modifiers; if we add many more we will have to redesign
  62    the mask mechanism.  */
  63
  64 enum rid
  65 {
  66   /* Modifiers: */
  67   /* C, in empirical order of frequency.  */
  68   RID_STATIC = 0,
  69   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  70   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  71   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  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_IVAR and RID_COPIES will be removed once @synthesize is
  89      completed.  */
  90   RID_COPIES, RID_IVAR,
  91   RID_NONATOMIC,
  92
  93   /* C (reserved and imaginary types not implemented, so any use is a
  94      syntax error) */
  95   RID_IMAGINARY,
  96
  97   /* C */
  98   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  99   RID_INT128,
 100   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
 101   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
 102   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
 103   RID_SIZEOF,
 104
 105   /* C extensions */
 106   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
 107   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
 108   RID_TYPES_COMPATIBLE_P,
 109   RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
 110   RID_FRACT, RID_ACCUM,
 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   /* Too many ways of getting the name of a function as a string */
 117   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
 118
 119   /* C++ (some of these are keywords in Objective-C as well, but only
 120      if they appear after a '@') */
 121   RID_BOOL,     RID_WCHAR,    RID_CLASS,
 122   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
 123   RID_TEMPLATE, RID_NULL,     RID_CATCH,
 124   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
 125   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
 126   RID_THIS,     RID_THROW,    RID_TRUE,
 127   RID_TRY,      RID_TYPENAME, RID_TYPEID,
 128   RID_USING,    RID_CHAR16,   RID_CHAR32,
 129
 130   /* casts */
 131   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
 132
 133   /* C++ extensions */
 134   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 135   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 136   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 137   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
 138   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 139   RID_IS_CONVERTIBLE_TO,       RID_IS_CLASS,
 140   RID_IS_EMPTY,                RID_IS_ENUM,
 141   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 142   RID_IS_STD_LAYOUT,           RID_IS_TRIVIAL,
 143   RID_IS_UNION,                RID_IS_LITERAL_TYPE,
 144
 145   /* C++0x */
 146   RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
 147
 148   /* Objective-C ("AT" reserved words - they are only keywords when
 149      they follow '@')  */
 150   RID_AT_ENCODE,   RID_AT_END,
 151   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 152   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,  RID_AT_PACKAGE,
 153   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 154   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 155   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 156   RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
 157   RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
 158   RID_AT_INTERFACE,
 159   RID_AT_IMPLEMENTATION,
 160
 161   /* Named address support, mapping the keyword to a particular named address
 162      number.  Named address space 0 is reserved for the generic address.  If
 163      there are more than 254 named addresses, the addr_space_t type will need
 164      to be grown from an unsigned char to unsigned short.  */
 165   RID_ADDR_SPACE_0,             /* generic address */
 166   RID_ADDR_SPACE_1,
 167   RID_ADDR_SPACE_2,
 168   RID_ADDR_SPACE_3,
 169   RID_ADDR_SPACE_4,
 170   RID_ADDR_SPACE_5,
 171   RID_ADDR_SPACE_6,
 172   RID_ADDR_SPACE_7,
 173   RID_ADDR_SPACE_8,
 174   RID_ADDR_SPACE_9,
 175   RID_ADDR_SPACE_10,
 176   RID_ADDR_SPACE_11,
 177   RID_ADDR_SPACE_12,
 178   RID_ADDR_SPACE_13,
 179   RID_ADDR_SPACE_14,
 180   RID_ADDR_SPACE_15,
 181
 182   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 183   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 184
 185   RID_MAX,
 186
 187   RID_FIRST_MODIFIER = RID_STATIC,
 188   RID_LAST_MODIFIER = RID_ONEWAY,
 189
 190   RID_FIRST_CXX0X = RID_CONSTEXPR,
 191   RID_LAST_CXX0X = RID_STATIC_ASSERT,
 192   RID_FIRST_AT = RID_AT_ENCODE,
 193   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 194   RID_FIRST_PQ = RID_IN,
 195   RID_LAST_PQ = RID_ONEWAY,
 196   RID_FIRST_PATTR = RID_GETTER,
 197   RID_LAST_PATTR = RID_NONATOMIC
 198 };
 199
 200 #define OBJC_IS_AT_KEYWORD(rid) \
 201   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 202    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 203
 204 #define OBJC_IS_PQ_KEYWORD(rid) \
 205   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 206    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 207
 208 #define OBJC_IS_PATTR_KEYWORD(rid) \
 209   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
 210    (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
 211
 212 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
 213    'class') which are shared in a subtle way between Objective-C and
 214    C++.  When the lexer is lexing in Objective-C/Objective-C++, if it
 215    finds '@' followed by one of these identifiers (eg, '@class'), it
 216    recognizes the whole as an Objective-C keyword.  If the identifier
 217    is found elsewhere, it follows the rules of the C/C++ language.
 218  */
 219 #define OBJC_IS_CXX_KEYWORD(rid) \
 220   (rid == RID_CLASS                                                     \
 221    || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE   \
 222    || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
 223
 224 /* The elements of `ridpointers' are identifier nodes for the reserved
 225    type names and storage classes.  It is indexed by a RID_... value.  */
 226 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 227
 228 /* Standard named or nameless data types of the C compiler.  */
 229
 230 enum c_tree_index
 231 {
 232     CTI_CHAR16_TYPE,
 233     CTI_CHAR32_TYPE,
 234     CTI_WCHAR_TYPE,
 235     CTI_UNDERLYING_WCHAR_TYPE,
 236     CTI_WINT_TYPE,
 237     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 238     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 239     CTI_INTMAX_TYPE,
 240     CTI_UINTMAX_TYPE,
 241     CTI_WIDEST_INT_LIT_TYPE,
 242     CTI_WIDEST_UINT_LIT_TYPE,
 243
 244     /* Types for <stdint.h>, that may not be defined on all
 245        targets.  */
 246     CTI_SIG_ATOMIC_TYPE,
 247     CTI_INT8_TYPE,
 248     CTI_INT16_TYPE,
 249     CTI_INT32_TYPE,
 250     CTI_INT64_TYPE,
 251     CTI_UINT8_TYPE,
 252     CTI_UINT16_TYPE,
 253     CTI_UINT32_TYPE,
 254     CTI_UINT64_TYPE,
 255     CTI_INT_LEAST8_TYPE,
 256     CTI_INT_LEAST16_TYPE,
 257     CTI_INT_LEAST32_TYPE,
 258     CTI_INT_LEAST64_TYPE,
 259     CTI_UINT_LEAST8_TYPE,
 260     CTI_UINT_LEAST16_TYPE,
 261     CTI_UINT_LEAST32_TYPE,
 262     CTI_UINT_LEAST64_TYPE,
 263     CTI_INT_FAST8_TYPE,
 264     CTI_INT_FAST16_TYPE,
 265     CTI_INT_FAST32_TYPE,
 266     CTI_INT_FAST64_TYPE,
 267     CTI_UINT_FAST8_TYPE,
 268     CTI_UINT_FAST16_TYPE,
 269     CTI_UINT_FAST32_TYPE,
 270     CTI_UINT_FAST64_TYPE,
 271     CTI_INTPTR_TYPE,
 272     CTI_UINTPTR_TYPE,
 273
 274     CTI_CHAR_ARRAY_TYPE,
 275     CTI_CHAR16_ARRAY_TYPE,
 276     CTI_CHAR32_ARRAY_TYPE,
 277     CTI_WCHAR_ARRAY_TYPE,
 278     CTI_INT_ARRAY_TYPE,
 279     CTI_STRING_TYPE,
 280     CTI_CONST_STRING_TYPE,
 281
 282     /* Type for boolean expressions (bool in C++, int in C).  */
 283     CTI_TRUTHVALUE_TYPE,
 284     CTI_TRUTHVALUE_TRUE,
 285     CTI_TRUTHVALUE_FALSE,
 286
 287     CTI_DEFAULT_FUNCTION_TYPE,
 288
 289     /* These are not types, but we have to look them up all the time.  */
 290     CTI_FUNCTION_NAME_DECL,
 291     CTI_PRETTY_FUNCTION_NAME_DECL,
 292     CTI_C99_FUNCTION_NAME_DECL,
 293     CTI_SAVED_FUNCTION_NAME_DECLS,
 294
 295     CTI_VOID_ZERO,
 296
 297     CTI_NULL,
 298
 299     CTI_MAX
 300 };
 301
 302 #define C_CPP_HASHNODE(id) \
 303   (&(((struct c_common_identifier *) (id))->node))
 304 #define C_RID_CODE(id) \
 305   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 306 #define C_SET_RID_CODE(id, code) \
 307   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 308
 309 /* Identifier part common to the C front ends.  Inherits from
 310    tree_identifier, despite appearances.  */
 311 struct GTY(()) c_common_identifier {
 312   struct tree_common common;
 313   struct cpp_hashnode node;
 314 };
 315
 316 /* An entry in the reserved keyword table.  */
 317
 318 struct c_common_resword
 319 {
 320   const char *const word;
 321   ENUM_BITFIELD(rid) const rid : 16;
 322   const unsigned int disable   : 16;
 323 };
 324
 325 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 326    mask) is _true_.  Thus for keywords which are present in all
 327    languages the disable field is zero.  */
 328
 329 #define D_CONLY         0x001   /* C only (not in C++).  */
 330 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 331 #define D_C99           0x004   /* In C, C99 only.  */
 332 #define D_CXX0X         0x008   /* In C++, C++0X only.  */
 333 #define D_EXT           0x010   /* GCC extension.  */
 334 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 335 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 336 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 337 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 338 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 339
 340 /* The reserved keyword table.  */
 341 extern const struct c_common_resword c_common_reswords[];
 342
 343 /* The number of items in the reserved keyword table.  */
 344 extern const unsigned int num_c_common_reswords;
 345
 346 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 347 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 348 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 349 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 350 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 351 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 352 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 353 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 354 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 355 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 356 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 357
 358 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 359 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 360 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 361 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 362 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 363 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 364 #define uint16_type_node                c_global_trees[CTI_UINT16_TYPE]
 365 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 366 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 367 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 368 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 369 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 370 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 371 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 372 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 373 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 374 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 375 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 376 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 377 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 378 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 379 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 380 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 381 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 382 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 383 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 384 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 385
 386 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 387 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 388 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 389
 390 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 391 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 392 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 393 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 394 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 395 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 396 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 397
 398 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 399
 400 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 401 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 402 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 403 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 404
 405 /* A node for `((void) 0)'.  */
 406 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 407
 408 /* The node for C++ `__null'.  */
 409 #define null_node                       c_global_trees[CTI_NULL]
 410
 411 extern GTY(()) tree c_global_trees[CTI_MAX];
 412
 413 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 414    tree for size reasons.  */
 415 struct GTY((variable_size)) sorted_fields_type {
 416   int len;
 417   tree GTY((length ("%h.len"))) elts[1];
 418 };
 419
 420 /* Mark which labels are explicitly declared.
 421    These may be shadowed, and may be referenced from nested functions.  */
 422 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 423
 424 typedef enum c_language_kind
 425 {
 426   clk_c         = 0,            /* C90, C94 or C99 */
 427   clk_objc      = 1,            /* clk_c with ObjC features.  */
 428   clk_cxx       = 2,            /* ANSI/ISO C++ */
 429   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 430 }
 431 c_language_kind;
 432
 433 /* To test for a specific language use c_language, defined by each
 434    front end.  For "ObjC features" or "not C++" use the macros.  */
 435 extern c_language_kind c_language;
 436
 437 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 438 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 439
 440 /* ObjC ivar visibility types.  */
 441 typedef enum objc_ivar_visibility_kind {
 442   OBJC_IVAR_VIS_PROTECTED = 0,
 443   OBJC_IVAR_VIS_PUBLIC    = 1,
 444   OBJC_IVAR_VIS_PRIVATE   = 2,
 445   OBJC_IVAR_VIS_PACKAGE   = 3
 446 } objc_ivar_visibility_kind;
 447
 448 /* The various name of operator that appears in error messages. */
 449 typedef enum ref_operator {
 450   /* NULL */
 451   RO_NULL,
 452   /* array indexing */
 453   RO_ARRAY_INDEXING,
 454   /* unary * */
 455   RO_UNARY_STAR,
 456   /* -> */
 457   RO_ARROW,
 458   /* implicit conversion */
 459   RO_IMPLICIT_CONVERSION
 460 } ref_operator;
 461
 462 /* Information about a statement tree.  */
 463
 464 struct GTY(()) stmt_tree_s {
 465   /* The current statement list being collected.  */
 466   tree x_cur_stmt_list;
 467
 468   /* In C++, Nonzero if we should treat statements as full
 469      expressions.  In particular, this variable is no-zero if at the
 470      end of a statement we should destroy any temporaries created
 471      during that statement.  Similarly, if, at the end of a block, we
 472      should destroy any local variables in this block.  Normally, this
 473      variable is nonzero, since those are the normal semantics of
 474      C++.
 475
 476      However, in order to represent aggregate initialization code as
 477      tree structure, we use statement-expressions.  The statements
 478      within the statement expression should not result in cleanups
 479      being run until the entire enclosing statement is complete.
 480
 481      This flag has no effect in C.  */
 482   int stmts_are_full_exprs_p;
 483 };
 484
 485 typedef struct stmt_tree_s *stmt_tree;
 486
 487 /* Global state pertinent to the current function.  Some C dialects
 488    extend this structure with additional fields.  */
 489
 490 struct GTY(()) c_language_function {
 491   /* While we are parsing the function, this contains information
 492      about the statement-tree that we are building.  */
 493   struct stmt_tree_s x_stmt_tree;
 494 };
 495
 496 /* When building a statement-tree, this is the current statement list
 497    being collected.  It's TREE_CHAIN is a back-pointer to the previous
 498    statement list.  */
 499
 500 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
 501
 502 /* Language-specific hooks.  */
 503
 504 /* If non-NULL, this function is called after a precompile header file
 505    is loaded.  */
 506 extern void (*lang_post_pch_load) (void);
 507
 508 extern void push_file_scope (void);
 509 extern void pop_file_scope (void);
 510 extern stmt_tree current_stmt_tree (void);
 511 extern tree push_stmt_list (void);
 512 extern tree pop_stmt_list (tree);
 513 extern tree add_stmt (tree);
 514 extern void push_cleanup (tree, tree, bool);
 515 extern tree pushdecl_top_level (tree);
 516 extern tree pushdecl (tree);
 517 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 518                                location_t, tree, tree);
 519 extern tree build_indirect_ref (location_t, tree, ref_operator);
 520
 521 extern int c_expand_decl (tree);
 522
 523 extern int field_decl_cmp (const void *, const void *);
 524 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 525                                   void *);
 526 extern bool has_c_linkage (const_tree decl);
 527 \f
 528 /* Switches common to the C front ends.  */
 529
 530 /* Nonzero means don't output line number information.  */
 531
 532 extern char flag_no_line_commands;
 533
 534 /* Nonzero causes -E output not to be done, but directives such as
 535    #define that have side effects are still obeyed.  */
 536
 537 extern char flag_no_output;
 538
 539 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 540    'N' or 'U' of the command line switch.  */
 541
 542 extern char flag_dump_macros;
 543
 544 /* Nonzero means pass #include lines through to the output.  */
 545
 546 extern char flag_dump_includes;
 547
 548 /* Nonzero means process PCH files while preprocessing.  */
 549
 550 extern bool flag_pch_preprocess;
 551
 552 /* The file name to which we should write a precompiled header, or
 553    NULL if no header will be written in this compile.  */
 554
 555 extern const char *pch_file;
 556
 557 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 558    user's namespace.  */
 559
 560 extern int flag_iso;
 561
 562 /* Warn about #pragma directives that are not recognized.  */
 563
 564 extern int warn_unknown_pragmas; /* Tri state variable.  */
 565
 566 /* Warn about format/argument anomalies in calls to formatted I/O functions
 567    (*printf, *scanf, strftime, strfmon, etc.).  */
 568
 569 extern int warn_format;
 570
 571
 572 /* C/ObjC language option variables.  */
 573
 574
 575 /* Nonzero means allow type mismatches in conditional expressions;
 576    just make their values `void'.  */
 577
 578 extern int flag_cond_mismatch;
 579
 580 /* Nonzero means enable C89 Amendment 1 features.  */
 581
 582 extern int flag_isoc94;
 583
 584 /* Nonzero means use the ISO C99 (or C1X) dialect of C.  */
 585
 586 extern int flag_isoc99;
 587
 588 /* Nonzero means use the ISO C1X dialect of C.  */
 589
 590 extern int flag_isoc1x;
 591
 592 /* Nonzero means that we have builtin functions, and main is an int.  */
 593
 594 extern int flag_hosted;
 595
 596 /* ObjC language option variables.  */
 597
 598
 599 /* Tells the compiler that this is a special run.  Do not perform any
 600    compiling, instead we are to test some platform dependent features
 601    and output a C header file with appropriate definitions.  */
 602
 603 extern int print_struct_values;
 604
 605 /* Tells the compiler what is the constant string class for ObjC.  */
 606
 607 extern const char *constant_string_class_name;
 608
 609
 610 /* C++ language option variables.  */
 611
 612
 613 /* Nonzero means generate separate instantiation control files and
 614    juggle them at link time.  */
 615
 616 extern int flag_use_repository;
 617
 618 /* The supported C++ dialects.  */
 619
 620 enum cxx_dialect {
 621   /* C++98  */
 622   cxx98,
 623   /* Experimental features that are likely to become part of
 624      C++0x.  */
 625   cxx0x
 626 };
 627
 628 /* The C++ dialect being used. C++98 is the default.  */
 629 extern enum cxx_dialect cxx_dialect;
 630
 631 /* Maximum template instantiation depth.  This limit is rather
 632    arbitrary, but it exists to limit the time it takes to notice
 633    infinite template instantiations.  */
 634
 635 extern int max_tinst_depth;
 636
 637 /* Nonzero means that we should not issue warnings about problems that
 638    occur when the code is executed, because the code being processed
 639    is not expected to be executed.  This is set during parsing.  This
 640    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 641    not a bool, because unexecuted expressions can nest.  */
 642
 643 extern int c_inhibit_evaluation_warnings;
 644
 645 /* Whether lexing has been completed, so subsequent preprocessor
 646    errors should use the compiler's input_location.  */
 647
 648 extern bool done_lexing;
 649
 650 /* C types are partitioned into three subsets: object, function, and
 651    incomplete types.  */
 652 #define C_TYPE_OBJECT_P(type) \
 653   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 654
 655 #define C_TYPE_INCOMPLETE_P(type) \
 656   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 657
 658 #define C_TYPE_FUNCTION_P(type) \
 659   (TREE_CODE (type) == FUNCTION_TYPE)
 660
 661 /* For convenience we define a single macro to identify the class of
 662    object or incomplete types.  */
 663 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 664   (!C_TYPE_FUNCTION_P (type))
 665
 666 /* Attribute table common to the C front ends.  */
 667 extern const struct attribute_spec c_common_attribute_table[];
 668 extern const struct attribute_spec c_common_format_attribute_table[];
 669
 670 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 671    ID is the identifier to use, NAME is the string.
 672    TYPE_DEP indicates whether it depends on type of the function or not
 673    (i.e. __PRETTY_FUNCTION__).  */
 674
 675 extern tree (*make_fname_decl) (location_t, tree, int);
 676
 677 /* In c-decl.c and cp/tree.c.  FIXME.  */
 678 extern void c_register_addr_space (const char *str, addr_space_t as);
 679
 680 /* In c-common.c.  */
 681 extern const char *c_addr_space_name (addr_space_t as);
 682 extern tree identifier_global_value (tree);
 683 extern void record_builtin_type (enum rid, const char *, tree);
 684 extern tree build_void_list_node (void);
 685 extern void start_fname_decls (void);
 686 extern void finish_fname_decls (void);
 687 extern const char *fname_as_string (int);
 688 extern tree fname_decl (location_t, unsigned, tree);
 689
 690 extern void check_function_arguments (tree, int, tree *, tree);
 691 extern void check_function_arguments_recurse (void (*)
 692                                               (void *, tree,
 693                                                unsigned HOST_WIDE_INT),
 694                                               void *, tree,
 695                                               unsigned HOST_WIDE_INT);
 696 extern bool check_builtin_function_arguments (tree, int, tree *);
 697 extern void check_function_format (tree, int, tree *);
 698 extern void set_Wformat (int);
 699 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 700 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 701 extern bool attribute_takes_identifier_p (const_tree);
 702 extern bool c_common_handle_option (size_t, const char *, int, int,
 703                                     const struct cl_option_handlers *);
 704 extern tree c_common_type_for_mode (enum machine_mode, int);
 705 extern tree c_common_type_for_size (unsigned int, int);
 706 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 707                                                 int, int);
 708 extern tree c_common_unsigned_type (tree);
 709 extern tree c_common_signed_type (tree);
 710 extern tree c_common_signed_or_unsigned_type (int, tree);
 711 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 712 extern bool decl_with_nonnull_addr_p (const_tree);
 713 extern tree c_fully_fold (tree, bool, bool *);
 714 extern tree decl_constant_value_for_optimization (tree);
 715 extern tree c_wrap_maybe_const (tree, bool);
 716 extern tree c_save_expr (tree);
 717 extern tree c_common_truthvalue_conversion (location_t, tree);
 718 extern void c_apply_type_quals_to_decl (int, tree);
 719 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
 720 extern tree c_alignof_expr (location_t, tree);
 721 /* Print an error message for invalid operands to arith operation CODE.
 722    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 723 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 724 extern tree fix_string_type (tree);
 725 extern void constant_expression_warning (tree);
 726 extern void constant_expression_error (tree);
 727 extern bool strict_aliasing_warning (tree, tree, tree);
 728 extern void warnings_for_convert_and_check (tree, tree, tree);
 729 extern tree convert_and_check (tree, tree);
 730 extern void overflow_warning (location_t, tree);
 731 extern void warn_logical_operator (location_t, enum tree_code, tree,
 732                                    enum tree_code, tree, enum tree_code, tree);
 733 extern void check_main_parameter_types (tree decl);
 734 extern bool c_determine_visibility (tree);
 735 extern bool same_scalar_type_ignoring_signedness (tree, tree);
 736 extern void mark_valid_location_for_stdc_pragma (bool);
 737 extern bool valid_location_for_stdc_pragma_p (void);
 738 extern void set_float_const_decimal64 (void);
 739 extern void clear_float_const_decimal64 (void);
 740 extern bool float_const_decimal64_p (void);
 741
 742 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, 1)
 743 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
 744
 745 /* Subroutine of build_binary_op, used for certain operations.  */
 746 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 747
 748 /* Subroutine of build_binary_op, used for comparison operations.
 749    See if the operands have both been converted from subword integer types
 750    and, if so, perhaps change them both back to their original type.  */
 751 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 752
 753 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
 754
 755 /* Add qualifiers to a type, in the fashion for C.  */
 756 extern tree c_build_qualified_type (tree, int);
 757
 758 /* Build tree nodes and builtin functions common to both C and C++ language
 759    frontends.  */
 760 extern void c_common_nodes_and_builtins (void);
 761
 762 extern void disable_builtin_function (const char *);
 763
 764 extern void set_compound_literal_name (tree decl);
 765
 766 extern tree build_va_arg (location_t, tree, tree);
 767
 768 extern unsigned int c_common_option_lang_mask (void);
 769 extern void c_common_initialize_diagnostics (diagnostic_context *);
 770 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
 771 extern void c_common_init_options_struct (struct gcc_options *);
 772 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
 773 extern bool c_common_post_options (const char **);
 774 extern bool c_common_init (void);
 775 extern void c_common_finish (void);
 776 extern void c_common_parse_file (int);
 777 extern alias_set_type c_common_get_alias_set (tree);
 778 extern void c_register_builtin_type (tree, const char*);
 779 extern bool c_promoting_integer_type_p (const_tree);
 780 extern int self_promoting_args_p (const_tree);
 781 extern tree strip_pointer_operator (tree);
 782 extern tree strip_pointer_or_array_types (tree);
 783 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 784
 785 /* This is the basic parsing function.  */
 786 extern void c_parse_file (void);
 787
 788 extern void warn_for_omitted_condop (location_t, tree);
 789
 790 /* These macros provide convenient access to the various _STMT nodes.  */
 791
 792 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 793    if a statement expression.  */
 794 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 795   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 796
 797 /* Nonzero if a label has been added to the statement list.  */
 798 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 799   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 800
 801 /* C_MAYBE_CONST_EXPR accessors.  */
 802 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 803   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 804 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 805   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 806 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 807   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 808 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 809   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 810 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 811   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 812    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 813        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 814            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 815
 816 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 817 #define DECL_C_BIT_FIELD(NODE) \
 818   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 819 #define SET_DECL_C_BIT_FIELD(NODE) \
 820   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 821 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 822   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 823
 824 extern tree do_case (location_t, tree, tree);
 825 extern tree build_stmt (location_t, enum tree_code, ...);
 826 extern tree build_case_label (location_t, tree, tree, tree);
 827
 828 /* These functions must be defined by each front-end which implements
 829    a variant of the C language.  They are used in c-common.c.  */
 830
 831 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 832 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 833 extern tree perform_integral_promotions (tree);
 834
 835 /* These functions must be defined by each front-end which implements
 836    a variant of the C language.  They are used by port files.  */
 837
 838 extern tree default_conversion (tree);
 839
 840 /* Given two integer or real types, return the type for their sum.
 841    Given two compatible ANSI C types, returns the merged type.  */
 842
 843 extern tree common_type (tree, tree);
 844
 845 extern tree decl_constant_value (tree);
 846
 847 /* Handle increment and decrement of boolean types.  */
 848 extern tree boolean_increment (enum tree_code, tree);
 849
 850 extern int case_compare (splay_tree_key, splay_tree_key);
 851
 852 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 853
 854 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 855
 856 extern tree build_function_call (location_t, tree, tree);
 857
 858 extern tree build_function_call_vec (location_t, tree,
 859                                      VEC(tree,gc) *, VEC(tree,gc) *);
 860
 861 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
 862
 863 extern tree finish_label_address_expr (tree, location_t);
 864
 865 /* Same function prototype, but the C and C++ front ends have
 866    different implementations.  Used in c-common.c.  */
 867 extern tree lookup_label (tree);
 868 extern tree lookup_name (tree);
 869 extern bool lvalue_p (const_tree);
 870
 871 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 872 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 873
 874 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 875
 876 extern void init_c_lex (void);
 877
 878 extern void c_cpp_builtins (cpp_reader *);
 879 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
 880 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
 881                          const char *, va_list *)
 882      ATTRIBUTE_GCC_DIAG(6,0);
 883
 884 /* Positive if an implicit `extern "C"' scope has just been entered;
 885    negative if such a scope has just been exited.  */
 886 extern GTY(()) int pending_lang_change;
 887
 888 /* Information recorded about each file examined during compilation.  */
 889
 890 struct c_fileinfo
 891 {
 892   int time;     /* Time spent in the file.  */
 893
 894   /* Flags used only by C++.
 895      INTERFACE_ONLY nonzero means that we are in an "interface" section
 896      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
 897      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
 898      INTERFACE_ONLY is zero, it means that we are responsible for
 899      exporting definitions that others might need.  */
 900   short interface_only;
 901   short interface_unknown;
 902 };
 903
 904 struct c_fileinfo *get_fileinfo (const char *);
 905 extern void dump_time_statistics (void);
 906
 907 extern bool c_dump_tree (void *, tree);
 908
 909 extern void verify_sequence_points (tree);
 910
 911 extern tree fold_offsetof (tree, tree);
 912
 913 /* Places where an lvalue, or modifiable lvalue, may be required.
 914    Used to select diagnostic messages in lvalue_error and
 915    readonly_error.  */
 916 enum lvalue_use {
 917   lv_assign,
 918   lv_increment,
 919   lv_decrement,
 920   lv_addressof,
 921   lv_asm
 922 };
 923
 924 extern void lvalue_error (enum lvalue_use);
 925
 926 extern int complete_array_type (tree *, tree, bool);
 927
 928 extern tree builtin_type_for_size (int, bool);
 929
 930 extern void c_common_mark_addressable_vec (tree);
 931
 932 extern void warn_array_subscript_with_type_char (tree);
 933 extern void warn_about_parentheses (enum tree_code,
 934                                     enum tree_code, tree,
 935                                     enum tree_code, tree);
 936 extern void warn_for_unused_label (tree label);
 937 extern void warn_for_div_by_zero (location_t, tree divisor);
 938 extern void warn_for_sign_compare (location_t,
 939                                    tree orig_op0, tree orig_op1,
 940                                    tree op0, tree op1,
 941                                    tree result_type,
 942                                    enum tree_code resultcode);
 943 extern void do_warn_double_promotion (tree, tree, tree, const char *,
 944                                       location_t);
 945 extern void set_underlying_type (tree x);
 946 extern VEC(tree,gc) *make_tree_vector (void);
 947 extern void release_tree_vector (VEC(tree,gc) *);
 948 extern VEC(tree,gc) *make_tree_vector_single (tree);
 949 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
 950
 951 /* In c-gimplify.c  */
 952 extern void c_genericize (tree);
 953 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
 954 extern tree c_build_bind_expr (location_t, tree, tree);
 955
 956 /* In c-pch.c  */
 957 extern void pch_init (void);
 958 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
 959 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
 960                                const char *orig);
 961 extern void c_common_write_pch (void);
 962 extern void c_common_no_more_pch (void);
 963 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
 964 extern void c_common_print_pch_checksum (FILE *f);
 965
 966 /* In *-checksum.c */
 967 extern const unsigned char executable_checksum[16];
 968
 969 /* In c-cppbuiltin.c  */
 970 extern void builtin_define_std (const char *macro);
 971 extern void builtin_define_with_value (const char *, const char *, int);
 972 extern void c_stddef_cpp_builtins (void);
 973 extern void fe_file_change (const struct line_map *);
 974 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
 975
 976 /* Objective-C / Objective-C++ entry points.  */
 977
 978 /* The following ObjC/ObjC++ functions are called by the C and/or C++
 979    front-ends; they all must have corresponding stubs in stub-objc.c.  */
 980 extern void objc_write_global_declarations (void);
 981 extern tree objc_is_class_name (tree);
 982 extern tree objc_is_object_ptr (tree);
 983 extern void objc_check_decl (tree);
 984 extern void objc_check_global_decl (tree);
 985 extern tree objc_common_type (tree, tree);
 986 extern tree objc_non_volatilized_type (tree);
 987 extern bool objc_compare_types (tree, tree, int, tree);
 988 extern bool objc_have_common_type (tree, tree, int, tree);
 989 extern bool objc_diagnose_private_ivar (tree);
 990 extern void objc_volatilize_decl (tree);
 991 extern bool objc_type_quals_match (tree, tree);
 992 extern tree objc_rewrite_function_call (tree, tree);
 993 extern tree objc_message_selector (void);
 994 extern tree objc_lookup_ivar (tree, tree);
 995 extern void objc_clear_super_receiver (void);
 996 extern int objc_is_public (tree, tree);
 997 extern tree objc_is_id (tree);
 998 extern void objc_declare_alias (tree, tree);
 999 extern void objc_declare_class (tree);
1000 extern void objc_declare_protocols (tree);
1001 extern tree objc_build_message_expr (tree);
1002 extern tree objc_finish_message_expr (tree, tree, tree);
1003 extern tree objc_build_selector_expr (location_t, tree);
1004 extern tree objc_build_protocol_expr (tree);
1005 extern tree objc_build_encode_expr (tree);
1006 extern tree objc_build_string_object (tree);
1007 extern tree objc_get_protocol_qualified_type (tree, tree);
1008 extern tree objc_get_class_reference (tree);
1009 extern tree objc_get_class_ivars (tree);
1010 extern tree objc_get_interface_ivars (tree);
1011 extern void objc_start_class_interface (tree, tree, tree, tree);
1012 extern void objc_start_category_interface (tree, tree, tree, tree);
1013 extern void objc_start_protocol (tree, tree, tree);
1014 extern void objc_continue_interface (void);
1015 extern void objc_finish_interface (void);
1016 extern void objc_start_class_implementation (tree, tree);
1017 extern void objc_start_category_implementation (tree, tree);
1018 extern void objc_continue_implementation (void);
1019 extern void objc_finish_implementation (void);
1020 extern void objc_set_visibility (objc_ivar_visibility_kind);
1021 extern tree objc_build_method_signature (bool, tree, tree, tree, bool);
1022 extern void objc_add_method_declaration (bool, tree, tree);
1023 extern bool objc_start_method_definition (bool, tree, tree);
1024 extern void objc_finish_method_definition (tree);
1025 extern void objc_add_instance_variable (tree);
1026 extern tree objc_build_keyword_decl (tree, tree, tree, tree);
1027 extern tree objc_build_throw_stmt (location_t, tree);
1028 extern void objc_begin_try_stmt (location_t, tree);
1029 extern tree objc_finish_try_stmt (void);
1030 extern void objc_begin_catch_clause (tree);
1031 extern void objc_finish_catch_clause (void);
1032 extern void objc_build_finally_clause (location_t, tree);
1033 extern tree objc_build_synchronized (location_t, tree, tree);
1034 extern int objc_static_init_needed_p (void);
1035 extern tree objc_generate_static_init_call (tree);
1036 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1037 extern void objc_set_method_opt (bool);
1038 extern void objc_finish_foreach_loop (location_t, tree, tree, tree, tree, tree);
1039 extern bool  objc_method_decl (enum tree_code);
1040 extern void objc_add_property_declaration (location_t, tree, bool, bool, bool,
1041                                            bool, bool, bool, tree, tree,
1042                                            bool, tree);
1043 extern tree objc_build_getter_call (tree, tree);
1044 extern tree objc_build_setter_call (tree, tree);
1045 extern void objc_add_synthesize_declaration (location_t, tree);
1046 extern void objc_add_dynamic_declaration (location_t, tree);
1047 extern const char * objc_maybe_printable_name (tree, int);
1048
1049 /* The following are provided by the C and C++ front-ends, and called by
1050    ObjC/ObjC++.  */
1051 extern void *objc_get_current_scope (void);
1052 extern void objc_mark_locals_volatile (void *);
1053
1054 /* In c-ppoutput.c  */
1055 extern void init_pp_output (FILE *);
1056 extern void preprocess_file (cpp_reader *);
1057 extern void pp_file_change (const struct line_map *);
1058 extern void pp_dir_change (cpp_reader *, const char *);
1059 extern bool check_missing_format_attribute (tree, tree);
1060
1061 /* In c-omp.c  */
1062 extern tree c_finish_omp_master (location_t, tree);
1063 extern tree c_finish_omp_critical (location_t, tree, tree);
1064 extern tree c_finish_omp_ordered (location_t, tree);
1065 extern void c_finish_omp_barrier (location_t);
1066 extern tree c_finish_omp_atomic (location_t, enum tree_code, tree, tree);
1067 extern void c_finish_omp_flush (location_t);
1068 extern void c_finish_omp_taskwait (location_t);
1069 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1070 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1071 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1072
1073 /* Not in c-omp.c; provided by the front end.  */
1074 extern bool c_omp_sharing_predetermined (tree);
1075 extern tree c_omp_remap_decl (tree, bool);
1076 extern void record_types_used_by_current_var_decl (tree);
1077
1078 #endif /* ! GCC_C_COMMON_H */