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_READONLY, RID_COPIES, RID_GETTER, RID_SETTER, RID_IVAR,
  86
  87   /* C (reserved and imaginary types not implemented, so any use is a
  88      syntax error) */
  89   RID_IMAGINARY,
  90
  91   /* C */
  92   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  93   RID_INT128,
  94   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  95   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  96   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  97   RID_SIZEOF,
  98
  99   /* C extensions */
 100   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
 101   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
 102   RID_TYPES_COMPATIBLE_P,
 103   RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
 104   RID_FRACT, RID_ACCUM,
 105
 106   /* This means to warn that this is a C++ keyword, and then treat it
 107      as a normal identifier.  */
 108   RID_CXX_COMPAT_WARN,
 109
 110   /* Too many ways of getting the name of a function as a string */
 111   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
 112
 113   /* C++ (some of these are keywords in Objective-C as well, but only
 114      if they appear after a '@') */
 115   RID_BOOL,     RID_WCHAR,    RID_CLASS,
 116   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
 117   RID_TEMPLATE, RID_NULL,     RID_CATCH,
 118   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
 119   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
 120   RID_THIS,     RID_THROW,    RID_TRUE,
 121   RID_TRY,      RID_TYPENAME, RID_TYPEID,
 122   RID_USING,    RID_CHAR16,   RID_CHAR32,
 123
 124   /* casts */
 125   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
 126
 127   /* C++ extensions */
 128   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 129   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 130   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 131   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
 132   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 133   RID_IS_CONVERTIBLE_TO,       RID_IS_CLASS,
 134   RID_IS_EMPTY,                RID_IS_ENUM,
 135   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 136   RID_IS_STD_LAYOUT,           RID_IS_TRIVIAL,
 137   RID_IS_UNION,
 138
 139   /* C++0x */
 140   RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
 141
 142   /* Objective-C ("AT" reserved words - they are only keywords when
 143      they follow '@')  */
 144   RID_AT_ENCODE,   RID_AT_END,
 145   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 146   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,  RID_AT_PACKAGE,
 147   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 148   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 149   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 150   RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
 151   RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
 152   RID_AT_INTERFACE,
 153   RID_AT_IMPLEMENTATION,
 154
 155   /* Named address support, mapping the keyword to a particular named address
 156      number.  Named address space 0 is reserved for the generic address.  If
 157      there are more than 254 named addresses, the addr_space_t type will need
 158      to be grown from an unsigned char to unsigned short.  */
 159   RID_ADDR_SPACE_0,             /* generic address */
 160   RID_ADDR_SPACE_1,
 161   RID_ADDR_SPACE_2,
 162   RID_ADDR_SPACE_3,
 163   RID_ADDR_SPACE_4,
 164   RID_ADDR_SPACE_5,
 165   RID_ADDR_SPACE_6,
 166   RID_ADDR_SPACE_7,
 167   RID_ADDR_SPACE_8,
 168   RID_ADDR_SPACE_9,
 169   RID_ADDR_SPACE_10,
 170   RID_ADDR_SPACE_11,
 171   RID_ADDR_SPACE_12,
 172   RID_ADDR_SPACE_13,
 173   RID_ADDR_SPACE_14,
 174   RID_ADDR_SPACE_15,
 175
 176   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 177   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 178
 179   RID_MAX,
 180
 181   RID_FIRST_MODIFIER = RID_STATIC,
 182   RID_LAST_MODIFIER = RID_ONEWAY,
 183
 184   RID_FIRST_CXX0X = RID_CONSTEXPR,
 185   RID_LAST_CXX0X = RID_STATIC_ASSERT,
 186   RID_FIRST_AT = RID_AT_ENCODE,
 187   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 188   RID_FIRST_PQ = RID_IN,
 189   RID_LAST_PQ = RID_ONEWAY,
 190   RID_FIRST_PATTR = RID_READONLY,
 191   RID_LAST_PATTR = RID_IVAR
 192 };
 193
 194 #define OBJC_IS_AT_KEYWORD(rid) \
 195   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 196    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 197
 198 #define OBJC_IS_PQ_KEYWORD(rid) \
 199   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 200    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 201
 202 #define OBJC_IS_PATTR_KEYWORD(rid) \
 203   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
 204    (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
 205
 206 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
 207    'class') which are shared in a subtle way between Objective-C and
 208    C++.  When the lexer is lexing in Objective-C/Objective-C++, if it
 209    finds '@' followed by one of these identifiers (eg, '@class'), it
 210    recognizes the whole as an Objective-C keyword.  If the identifier
 211    is found elsewhere, it follows the rules of the C/C++ language.
 212  */
 213 #define OBJC_IS_CXX_KEYWORD(rid) \
 214   (rid == RID_CLASS                                                     \
 215    || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE   \
 216    || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
 217
 218 /* The elements of `ridpointers' are identifier nodes for the reserved
 219    type names and storage classes.  It is indexed by a RID_... value.  */
 220 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 221
 222 /* Standard named or nameless data types of the C compiler.  */
 223
 224 enum c_tree_index
 225 {
 226     CTI_CHAR16_TYPE,
 227     CTI_CHAR32_TYPE,
 228     CTI_WCHAR_TYPE,
 229     CTI_UNDERLYING_WCHAR_TYPE,
 230     CTI_WINT_TYPE,
 231     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 232     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 233     CTI_INTMAX_TYPE,
 234     CTI_UINTMAX_TYPE,
 235     CTI_WIDEST_INT_LIT_TYPE,
 236     CTI_WIDEST_UINT_LIT_TYPE,
 237
 238     /* Types for <stdint.h>, that may not be defined on all
 239        targets.  */
 240     CTI_SIG_ATOMIC_TYPE,
 241     CTI_INT8_TYPE,
 242     CTI_INT16_TYPE,
 243     CTI_INT32_TYPE,
 244     CTI_INT64_TYPE,
 245     CTI_UINT8_TYPE,
 246     CTI_UINT16_TYPE,
 247     CTI_UINT32_TYPE,
 248     CTI_UINT64_TYPE,
 249     CTI_INT_LEAST8_TYPE,
 250     CTI_INT_LEAST16_TYPE,
 251     CTI_INT_LEAST32_TYPE,
 252     CTI_INT_LEAST64_TYPE,
 253     CTI_UINT_LEAST8_TYPE,
 254     CTI_UINT_LEAST16_TYPE,
 255     CTI_UINT_LEAST32_TYPE,
 256     CTI_UINT_LEAST64_TYPE,
 257     CTI_INT_FAST8_TYPE,
 258     CTI_INT_FAST16_TYPE,
 259     CTI_INT_FAST32_TYPE,
 260     CTI_INT_FAST64_TYPE,
 261     CTI_UINT_FAST8_TYPE,
 262     CTI_UINT_FAST16_TYPE,
 263     CTI_UINT_FAST32_TYPE,
 264     CTI_UINT_FAST64_TYPE,
 265     CTI_INTPTR_TYPE,
 266     CTI_UINTPTR_TYPE,
 267
 268     CTI_CHAR_ARRAY_TYPE,
 269     CTI_CHAR16_ARRAY_TYPE,
 270     CTI_CHAR32_ARRAY_TYPE,
 271     CTI_WCHAR_ARRAY_TYPE,
 272     CTI_INT_ARRAY_TYPE,
 273     CTI_STRING_TYPE,
 274     CTI_CONST_STRING_TYPE,
 275
 276     /* Type for boolean expressions (bool in C++, int in C).  */
 277     CTI_TRUTHVALUE_TYPE,
 278     CTI_TRUTHVALUE_TRUE,
 279     CTI_TRUTHVALUE_FALSE,
 280
 281     CTI_DEFAULT_FUNCTION_TYPE,
 282
 283     /* These are not types, but we have to look them up all the time.  */
 284     CTI_FUNCTION_NAME_DECL,
 285     CTI_PRETTY_FUNCTION_NAME_DECL,
 286     CTI_C99_FUNCTION_NAME_DECL,
 287     CTI_SAVED_FUNCTION_NAME_DECLS,
 288
 289     CTI_VOID_ZERO,
 290
 291     CTI_NULL,
 292
 293     CTI_MAX
 294 };
 295
 296 #define C_CPP_HASHNODE(id) \
 297   (&(((struct c_common_identifier *) (id))->node))
 298 #define C_RID_CODE(id) \
 299   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 300 #define C_SET_RID_CODE(id, code) \
 301   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 302
 303 /* Identifier part common to the C front ends.  Inherits from
 304    tree_identifier, despite appearances.  */
 305 struct GTY(()) c_common_identifier {
 306   struct tree_common common;
 307   struct cpp_hashnode node;
 308 };
 309
 310 /* An entry in the reserved keyword table.  */
 311
 312 struct c_common_resword
 313 {
 314   const char *const word;
 315   ENUM_BITFIELD(rid) const rid : 16;
 316   const unsigned int disable   : 16;
 317 };
 318
 319 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 320    mask) is _true_.  Thus for keywords which are present in all
 321    languages the disable field is zero.  */
 322
 323 #define D_CONLY         0x001   /* C only (not in C++).  */
 324 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 325 #define D_C99           0x004   /* In C, C99 only.  */
 326 #define D_CXX0X         0x008   /* In C++, C++0X only.  */
 327 #define D_EXT           0x010   /* GCC extension.  */
 328 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 329 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 330 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 331 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 332 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 333
 334 /* The reserved keyword table.  */
 335 extern const struct c_common_resword c_common_reswords[];
 336
 337 /* The number of items in the reserved keyword table.  */
 338 extern const unsigned int num_c_common_reswords;
 339
 340 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 341 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 342 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 343 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 344 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 345 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 346 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 347 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 348 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 349 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 350 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 351
 352 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 353 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 354 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 355 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 356 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 357 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 358 #define uint16_type_node                c_global_trees[CTI_UINT16_TYPE]
 359 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 360 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 361 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 362 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 363 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 364 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 365 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 366 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 367 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 368 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 369 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 370 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 371 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 372 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 373 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 374 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 375 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 376 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 377 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 378 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 379
 380 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 381 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 382 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 383
 384 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 385 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 386 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 387 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 388 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 389 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 390 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 391
 392 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 393
 394 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 395 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 396 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 397 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 398
 399 /* A node for `((void) 0)'.  */
 400 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 401
 402 /* The node for C++ `__null'.  */
 403 #define null_node                       c_global_trees[CTI_NULL]
 404
 405 extern GTY(()) tree c_global_trees[CTI_MAX];
 406
 407 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 408    tree for size reasons.  */
 409 struct GTY((variable_size)) sorted_fields_type {
 410   int len;
 411   tree GTY((length ("%h.len"))) elts[1];
 412 };
 413
 414 /* Mark which labels are explicitly declared.
 415    These may be shadowed, and may be referenced from nested functions.  */
 416 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 417
 418 typedef enum c_language_kind
 419 {
 420   clk_c         = 0,            /* C90, C94 or C99 */
 421   clk_objc      = 1,            /* clk_c with ObjC features.  */
 422   clk_cxx       = 2,            /* ANSI/ISO C++ */
 423   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 424 }
 425 c_language_kind;
 426
 427 /* To test for a specific language use c_language, defined by each
 428    front end.  For "ObjC features" or "not C++" use the macros.  */
 429 extern c_language_kind c_language;
 430
 431 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 432 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 433
 434 /* ObjC Property Attribute types.  */
 435 typedef enum objc_property_attribute_kind {
 436   OBJC_PATTR_INIT       = 0,
 437   OBJC_PATTR_READONLY   = 1,
 438   OBJC_PATTR_GETTER     = 2,
 439   OBJC_PATTR_SETTER     = 3,
 440   OBJC_PATTR_IVAR       = 4,
 441   OBJC_PATTR_COPIES     = 5
 442 } objc_property_attribute_kind;
 443
 444 /* ObjC ivar visibility types.  */
 445 typedef enum objc_ivar_visibility_kind {
 446   OBJC_IVAR_VIS_PROTECTED = 0,
 447   OBJC_IVAR_VIS_PUBLIC    = 1,
 448   OBJC_IVAR_VIS_PRIVATE   = 2,
 449   OBJC_IVAR_VIS_PACKAGE   = 3
 450 } objc_ivar_visibility_kind;
 451
 452 /* The various name of operator that appears in error messages. */
 453 typedef enum ref_operator {
 454   /* NULL */
 455   RO_NULL,
 456   /* array indexing */
 457   RO_ARRAY_INDEXING,
 458   /* unary * */
 459   RO_UNARY_STAR,
 460   /* -> */
 461   RO_ARROW,
 462   /* implicit conversion */
 463   RO_IMPLICIT_CONVERSION
 464 } ref_operator;
 465
 466 /* Information about a statement tree.  */
 467
 468 struct GTY(()) stmt_tree_s {
 469   /* The current statement list being collected.  */
 470   tree x_cur_stmt_list;
 471
 472   /* In C++, Nonzero if we should treat statements as full
 473      expressions.  In particular, this variable is no-zero if at the
 474      end of a statement we should destroy any temporaries created
 475      during that statement.  Similarly, if, at the end of a block, we
 476      should destroy any local variables in this block.  Normally, this
 477      variable is nonzero, since those are the normal semantics of
 478      C++.
 479
 480      However, in order to represent aggregate initialization code as
 481      tree structure, we use statement-expressions.  The statements
 482      within the statement expression should not result in cleanups
 483      being run until the entire enclosing statement is complete.
 484
 485      This flag has no effect in C.  */
 486   int stmts_are_full_exprs_p;
 487 };
 488
 489 typedef struct stmt_tree_s *stmt_tree;
 490
 491 /* Global state pertinent to the current function.  Some C dialects
 492    extend this structure with additional fields.  */
 493
 494 struct GTY(()) c_language_function {
 495   /* While we are parsing the function, this contains information
 496      about the statement-tree that we are building.  */
 497   struct stmt_tree_s x_stmt_tree;
 498 };
 499
 500 /* When building a statement-tree, this is the current statement list
 501    being collected.  It's TREE_CHAIN is a back-pointer to the previous
 502    statement list.  */
 503
 504 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
 505
 506 /* Language-specific hooks.  */
 507
 508 /* If non-NULL, this function is called after a precompile header file
 509    is loaded.  */
 510 extern void (*lang_post_pch_load) (void);
 511
 512 extern void push_file_scope (void);
 513 extern void pop_file_scope (void);
 514 extern stmt_tree current_stmt_tree (void);
 515 extern tree push_stmt_list (void);
 516 extern tree pop_stmt_list (tree);
 517 extern tree add_stmt (tree);
 518 extern void push_cleanup (tree, tree, bool);
 519 extern tree pushdecl_top_level (tree);
 520 extern tree pushdecl (tree);
 521 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 522                                location_t, tree, tree);
 523 extern tree build_indirect_ref (location_t, tree, ref_operator);
 524
 525 extern int c_expand_decl (tree);
 526
 527 extern int field_decl_cmp (const void *, const void *);
 528 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 529                                   void *);
 530 extern bool has_c_linkage (const_tree decl);
 531 \f
 532 /* Switches common to the C front ends.  */
 533
 534 /* Nonzero means don't output line number information.  */
 535
 536 extern char flag_no_line_commands;
 537
 538 /* Nonzero causes -E output not to be done, but directives such as
 539    #define that have side effects are still obeyed.  */
 540
 541 extern char flag_no_output;
 542
 543 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 544    'N' or 'U' of the command line switch.  */
 545
 546 extern char flag_dump_macros;
 547
 548 /* Nonzero means pass #include lines through to the output.  */
 549
 550 extern char flag_dump_includes;
 551
 552 /* Nonzero means process PCH files while preprocessing.  */
 553
 554 extern bool flag_pch_preprocess;
 555
 556 /* The file name to which we should write a precompiled header, or
 557    NULL if no header will be written in this compile.  */
 558
 559 extern const char *pch_file;
 560
 561 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 562    user's namespace.  */
 563
 564 extern int flag_iso;
 565
 566 /* Warn about #pragma directives that are not recognized.  */
 567
 568 extern int warn_unknown_pragmas; /* Tri state variable.  */
 569
 570 /* Warn about format/argument anomalies in calls to formatted I/O functions
 571    (*printf, *scanf, strftime, strfmon, etc.).  */
 572
 573 extern int warn_format;
 574
 575
 576 /* C/ObjC language option variables.  */
 577
 578
 579 /* Nonzero means allow type mismatches in conditional expressions;
 580    just make their values `void'.  */
 581
 582 extern int flag_cond_mismatch;
 583
 584 /* Nonzero means enable C89 Amendment 1 features.  */
 585
 586 extern int flag_isoc94;
 587
 588 /* Nonzero means use the ISO C99 (or C1X) dialect of C.  */
 589
 590 extern int flag_isoc99;
 591
 592 /* Nonzero means use the ISO C1X dialect of C.  */
 593
 594 extern int flag_isoc1x;
 595
 596 /* Nonzero means that we have builtin functions, and main is an int.  */
 597
 598 extern int flag_hosted;
 599
 600 /* ObjC language option variables.  */
 601
 602
 603 /* Tells the compiler that this is a special run.  Do not perform any
 604    compiling, instead we are to test some platform dependent features
 605    and output a C header file with appropriate definitions.  */
 606
 607 extern int print_struct_values;
 608
 609 /* Tells the compiler what is the constant string class for ObjC.  */
 610
 611 extern const char *constant_string_class_name;
 612
 613
 614 /* C++ language option variables.  */
 615
 616
 617 /* Nonzero means generate separate instantiation control files and
 618    juggle them at link time.  */
 619
 620 extern int flag_use_repository;
 621
 622 /* The supported C++ dialects.  */
 623
 624 enum cxx_dialect {
 625   /* C++98  */
 626   cxx98,
 627   /* Experimental features that are likely to become part of
 628      C++0x.  */
 629   cxx0x
 630 };
 631
 632 /* The C++ dialect being used. C++98 is the default.  */
 633 extern enum cxx_dialect cxx_dialect;
 634
 635 /* Maximum template instantiation depth.  This limit is rather
 636    arbitrary, but it exists to limit the time it takes to notice
 637    infinite template instantiations.  */
 638
 639 extern int max_tinst_depth;
 640
 641 /* Nonzero means that we should not issue warnings about problems that
 642    occur when the code is executed, because the code being processed
 643    is not expected to be executed.  This is set during parsing.  This
 644    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 645    not a bool, because unexecuted expressions can nest.  */
 646
 647 extern int c_inhibit_evaluation_warnings;
 648
 649 /* Whether lexing has been completed, so subsequent preprocessor
 650    errors should use the compiler's input_location.  */
 651
 652 extern bool done_lexing;
 653
 654 /* C types are partitioned into three subsets: object, function, and
 655    incomplete types.  */
 656 #define C_TYPE_OBJECT_P(type) \
 657   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 658
 659 #define C_TYPE_INCOMPLETE_P(type) \
 660   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 661
 662 #define C_TYPE_FUNCTION_P(type) \
 663   (TREE_CODE (type) == FUNCTION_TYPE)
 664
 665 /* For convenience we define a single macro to identify the class of
 666    object or incomplete types.  */
 667 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 668   (!C_TYPE_FUNCTION_P (type))
 669
 670 /* Attribute table common to the C front ends.  */
 671 extern const struct attribute_spec c_common_attribute_table[];
 672 extern const struct attribute_spec c_common_format_attribute_table[];
 673
 674 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 675    ID is the identifier to use, NAME is the string.
 676    TYPE_DEP indicates whether it depends on type of the function or not
 677    (i.e. __PRETTY_FUNCTION__).  */
 678
 679 extern tree (*make_fname_decl) (location_t, tree, int);
 680
 681 /* In c-decl.c and cp/tree.c.  FIXME.  */
 682 extern void c_register_addr_space (const char *str, addr_space_t as);
 683
 684 /* In c-common.c.  */
 685 extern const char *c_addr_space_name (addr_space_t as);
 686 extern tree identifier_global_value (tree);
 687 extern void record_builtin_type (enum rid, const char *, tree);
 688 extern tree build_void_list_node (void);
 689 extern void start_fname_decls (void);
 690 extern void finish_fname_decls (void);
 691 extern const char *fname_as_string (int);
 692 extern tree fname_decl (location_t, unsigned, tree);
 693
 694 extern void check_function_arguments (tree, int, tree *, tree);
 695 extern void check_function_arguments_recurse (void (*)
 696                                               (void *, tree,
 697                                                unsigned HOST_WIDE_INT),
 698                                               void *, tree,
 699                                               unsigned HOST_WIDE_INT);
 700 extern bool check_builtin_function_arguments (tree, int, tree *);
 701 extern void check_function_format (tree, int, tree *);
 702 extern void set_Wformat (int);
 703 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 704 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 705 extern bool attribute_takes_identifier_p (const_tree);
 706 extern bool c_common_handle_option (size_t, const char *, int, int,
 707                                     const struct cl_option_handlers *);
 708 extern tree c_common_type_for_mode (enum machine_mode, int);
 709 extern tree c_common_type_for_size (unsigned int, int);
 710 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 711                                                 int, int);
 712 extern tree c_common_unsigned_type (tree);
 713 extern tree c_common_signed_type (tree);
 714 extern tree c_common_signed_or_unsigned_type (int, tree);
 715 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 716 extern bool decl_with_nonnull_addr_p (const_tree);
 717 extern tree c_fully_fold (tree, bool, bool *);
 718 extern tree decl_constant_value_for_optimization (tree);
 719 extern tree c_wrap_maybe_const (tree, bool);
 720 extern tree c_save_expr (tree);
 721 extern tree c_common_truthvalue_conversion (location_t, tree);
 722 extern void c_apply_type_quals_to_decl (int, tree);
 723 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
 724 extern tree c_alignof_expr (location_t, tree);
 725 /* Print an error message for invalid operands to arith operation CODE.
 726    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 727 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 728 extern tree fix_string_type (tree);
 729 extern void constant_expression_warning (tree);
 730 extern void constant_expression_error (tree);
 731 extern bool strict_aliasing_warning (tree, tree, tree);
 732 extern void warnings_for_convert_and_check (tree, tree, tree);
 733 extern tree convert_and_check (tree, tree);
 734 extern void overflow_warning (location_t, tree);
 735 extern void warn_logical_operator (location_t, enum tree_code, tree,
 736                                    enum tree_code, tree, enum tree_code, tree);
 737 extern void check_main_parameter_types (tree decl);
 738 extern bool c_determine_visibility (tree);
 739 extern bool same_scalar_type_ignoring_signedness (tree, tree);
 740 extern void mark_valid_location_for_stdc_pragma (bool);
 741 extern bool valid_location_for_stdc_pragma_p (void);
 742 extern void set_float_const_decimal64 (void);
 743 extern void clear_float_const_decimal64 (void);
 744 extern bool float_const_decimal64_p (void);
 745
 746 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, 1)
 747 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
 748
 749 /* Subroutine of build_binary_op, used for certain operations.  */
 750 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 751
 752 /* Subroutine of build_binary_op, used for comparison operations.
 753    See if the operands have both been converted from subword integer types
 754    and, if so, perhaps change them both back to their original type.  */
 755 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 756
 757 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
 758
 759 /* Add qualifiers to a type, in the fashion for C.  */
 760 extern tree c_build_qualified_type (tree, int);
 761
 762 /* Build tree nodes and builtin functions common to both C and C++ language
 763    frontends.  */
 764 extern void c_common_nodes_and_builtins (void);
 765
 766 extern void disable_builtin_function (const char *);
 767
 768 extern void set_compound_literal_name (tree decl);
 769
 770 extern tree build_va_arg (location_t, tree, tree);
 771
 772 extern unsigned int c_common_option_lang_mask (void);
 773 extern void c_common_initialize_diagnostics (diagnostic_context *);
 774 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
 775 extern void c_common_init_options_struct (struct gcc_options *);
 776 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
 777 extern bool c_common_post_options (const char **);
 778 extern bool c_common_init (void);
 779 extern void c_common_finish (void);
 780 extern void c_common_parse_file (int);
 781 extern alias_set_type c_common_get_alias_set (tree);
 782 extern void c_register_builtin_type (tree, const char*);
 783 extern bool c_promoting_integer_type_p (const_tree);
 784 extern int self_promoting_args_p (const_tree);
 785 extern tree strip_pointer_operator (tree);
 786 extern tree strip_pointer_or_array_types (tree);
 787 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 788
 789 /* This is the basic parsing function.  */
 790 extern void c_parse_file (void);
 791
 792 extern void warn_for_omitted_condop (location_t, tree);
 793
 794 /* These macros provide convenient access to the various _STMT nodes.  */
 795
 796 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 797    if a statement expression.  */
 798 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 799   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 800
 801 /* Nonzero if a label has been added to the statement list.  */
 802 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 803   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 804
 805 /* C_MAYBE_CONST_EXPR accessors.  */
 806 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 807   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 808 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 809   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 810 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 811   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 812 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 813   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 814 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 815   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 816    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 817        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 818            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 819
 820 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 821 #define DECL_C_BIT_FIELD(NODE) \
 822   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 823 #define SET_DECL_C_BIT_FIELD(NODE) \
 824   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 825 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 826   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 827
 828 extern tree do_case (location_t, tree, tree);
 829 extern tree build_stmt (location_t, enum tree_code, ...);
 830 extern tree build_case_label (location_t, tree, tree, tree);
 831
 832 /* These functions must be defined by each front-end which implements
 833    a variant of the C language.  They are used in c-common.c.  */
 834
 835 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 836 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 837 extern tree perform_integral_promotions (tree);
 838
 839 /* These functions must be defined by each front-end which implements
 840    a variant of the C language.  They are used by port files.  */
 841
 842 extern tree default_conversion (tree);
 843
 844 /* Given two integer or real types, return the type for their sum.
 845    Given two compatible ANSI C types, returns the merged type.  */
 846
 847 extern tree common_type (tree, tree);
 848
 849 extern tree decl_constant_value (tree);
 850
 851 /* Handle increment and decrement of boolean types.  */
 852 extern tree boolean_increment (enum tree_code, tree);
 853
 854 extern int case_compare (splay_tree_key, splay_tree_key);
 855
 856 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 857
 858 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 859
 860 extern tree build_function_call (location_t, tree, tree);
 861
 862 extern tree build_function_call_vec (location_t, tree,
 863                                      VEC(tree,gc) *, VEC(tree,gc) *);
 864
 865 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
 866
 867 extern tree finish_label_address_expr (tree, location_t);
 868
 869 /* Same function prototype, but the C and C++ front ends have
 870    different implementations.  Used in c-common.c.  */
 871 extern tree lookup_label (tree);
 872 extern tree lookup_name (tree);
 873 extern bool lvalue_p (const_tree);
 874
 875 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 876 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 877
 878 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 879
 880 extern void init_c_lex (void);
 881
 882 extern void c_cpp_builtins (cpp_reader *);
 883 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
 884 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
 885                          const char *, va_list *)
 886      ATTRIBUTE_GCC_DIAG(6,0);
 887
 888 /* Positive if an implicit `extern "C"' scope has just been entered;
 889    negative if such a scope has just been exited.  */
 890 extern GTY(()) int pending_lang_change;
 891
 892 /* Information recorded about each file examined during compilation.  */
 893
 894 struct c_fileinfo
 895 {
 896   int time;     /* Time spent in the file.  */
 897
 898   /* Flags used only by C++.
 899      INTERFACE_ONLY nonzero means that we are in an "interface" section
 900      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
 901      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
 902      INTERFACE_ONLY is zero, it means that we are responsible for
 903      exporting definitions that others might need.  */
 904   short interface_only;
 905   short interface_unknown;
 906 };
 907
 908 struct c_fileinfo *get_fileinfo (const char *);
 909 extern void dump_time_statistics (void);
 910
 911 extern bool c_dump_tree (void *, tree);
 912
 913 extern void verify_sequence_points (tree);
 914
 915 extern tree fold_offsetof (tree, tree);
 916
 917 /* Places where an lvalue, or modifiable lvalue, may be required.
 918    Used to select diagnostic messages in lvalue_error and
 919    readonly_error.  */
 920 enum lvalue_use {
 921   lv_assign,
 922   lv_increment,
 923   lv_decrement,
 924   lv_addressof,
 925   lv_asm
 926 };
 927
 928 extern void lvalue_error (enum lvalue_use);
 929
 930 extern int complete_array_type (tree *, tree, bool);
 931
 932 extern tree builtin_type_for_size (int, bool);
 933
 934 extern void warn_array_subscript_with_type_char (tree);
 935 extern void warn_about_parentheses (enum tree_code,
 936                                     enum tree_code, tree,
 937                                     enum tree_code, tree);
 938 extern void warn_for_unused_label (tree label);
 939 extern void warn_for_div_by_zero (location_t, tree divisor);
 940 extern void warn_for_sign_compare (location_t,
 941                                    tree orig_op0, tree orig_op1,
 942                                    tree op0, tree op1,
 943                                    tree result_type,
 944                                    enum tree_code resultcode);
 945 extern void do_warn_double_promotion (tree, tree, tree, const char *,
 946                                       location_t);
 947 extern void set_underlying_type (tree x);
 948 extern VEC(tree,gc) *make_tree_vector (void);
 949 extern void release_tree_vector (VEC(tree,gc) *);
 950 extern VEC(tree,gc) *make_tree_vector_single (tree);
 951 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
 952
 953 /* In c-gimplify.c  */
 954 extern void c_genericize (tree);
 955 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
 956 extern tree c_build_bind_expr (location_t, tree, tree);
 957
 958 /* In c-pch.c  */
 959 extern void pch_init (void);
 960 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
 961 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
 962                                const char *orig);
 963 extern void c_common_write_pch (void);
 964 extern void c_common_no_more_pch (void);
 965 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
 966 extern void c_common_print_pch_checksum (FILE *f);
 967
 968 /* In *-checksum.c */
 969 extern const unsigned char executable_checksum[16];
 970
 971 /* In c-cppbuiltin.c  */
 972 extern void builtin_define_std (const char *macro);
 973 extern void builtin_define_with_value (const char *, const char *, int);
 974 extern void c_stddef_cpp_builtins (void);
 975 extern void fe_file_change (const struct line_map *);
 976 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
 977
 978 /* Objective-C / Objective-C++ entry points.  */
 979
 980 /* The following ObjC/ObjC++ functions are called by the C and/or C++
 981    front-ends; they all must have corresponding stubs in stub-objc.c.  */
 982 extern void objc_write_global_declarations (void);
 983 extern tree objc_is_class_name (tree);
 984 extern tree objc_is_object_ptr (tree);
 985 extern void objc_check_decl (tree);
 986 extern void objc_check_global_decl (tree);
 987 extern tree objc_common_type (tree, tree);
 988 extern tree objc_non_volatilized_type (tree);
 989 extern bool objc_compare_types (tree, tree, int, tree);
 990 extern bool objc_have_common_type (tree, tree, int, tree);
 991 extern bool objc_diagnose_private_ivar (tree);
 992 extern void objc_volatilize_decl (tree);
 993 extern bool objc_type_quals_match (tree, tree);
 994 extern tree objc_rewrite_function_call (tree, tree);
 995 extern tree objc_message_selector (void);
 996 extern tree objc_lookup_ivar (tree, tree);
 997 extern void objc_clear_super_receiver (void);
 998 extern int objc_is_public (tree, tree);
 999 extern tree objc_is_id (tree);
1000 extern void objc_declare_alias (tree, tree);
1001 extern void objc_declare_class (tree);
1002 extern void objc_declare_protocols (tree);
1003 extern tree objc_build_message_expr (tree);
1004 extern tree objc_finish_message_expr (tree, tree, tree);
1005 extern tree objc_build_selector_expr (location_t, tree);
1006 extern tree objc_build_protocol_expr (tree);
1007 extern tree objc_build_encode_expr (tree);
1008 extern tree objc_build_string_object (tree);
1009 extern tree objc_get_protocol_qualified_type (tree, tree);
1010 extern tree objc_get_class_reference (tree);
1011 extern tree objc_get_class_ivars (tree);
1012 extern tree objc_get_interface_ivars (tree);
1013 extern void objc_start_class_interface (tree, tree, tree, tree);
1014 extern void objc_start_category_interface (tree, tree, tree, tree);
1015 extern void objc_start_protocol (tree, tree, tree);
1016 extern void objc_continue_interface (void);
1017 extern void objc_finish_interface (void);
1018 extern void objc_start_class_implementation (tree, tree);
1019 extern void objc_start_category_implementation (tree, tree);
1020 extern void objc_continue_implementation (void);
1021 extern void objc_finish_implementation (void);
1022 extern void objc_set_visibility (objc_ivar_visibility_kind);
1023 extern tree objc_build_method_signature (bool, tree, tree, tree, bool);
1024 extern void objc_add_method_declaration (bool, tree, tree);
1025 extern bool objc_start_method_definition (bool, tree, tree);
1026 extern void objc_finish_method_definition (tree);
1027 extern void objc_add_instance_variable (tree);
1028 extern tree objc_build_keyword_decl (tree, tree, tree, tree);
1029 extern tree objc_build_throw_stmt (location_t, tree);
1030 extern void objc_begin_try_stmt (location_t, tree);
1031 extern tree objc_finish_try_stmt (void);
1032 extern void objc_begin_catch_clause (tree);
1033 extern void objc_finish_catch_clause (void);
1034 extern void objc_build_finally_clause (location_t, tree);
1035 extern tree objc_build_synchronized (location_t, tree, tree);
1036 extern int objc_static_init_needed_p (void);
1037 extern tree objc_generate_static_init_call (tree);
1038 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1039 extern void objc_set_method_opt (bool);
1040 extern void objc_finish_foreach_loop (location_t, tree, tree, tree, tree, tree);
1041 extern void objc_set_property_attr
1042   (location_t, objc_property_attribute_kind, tree);
1043 extern bool  objc_method_decl (enum tree_code);
1044 extern void objc_add_property_variable (tree);
1045 extern tree objc_build_getter_call (tree, tree);
1046 extern tree objc_build_setter_call (tree, tree);
1047 extern void objc_add_synthesize_declaration (location_t, tree);
1048 extern void objc_add_dynamic_declaration (location_t, tree);
1049
1050 /* The following are provided by the C and C++ front-ends, and called by
1051    ObjC/ObjC++.  */
1052 extern void *objc_get_current_scope (void);
1053 extern void objc_mark_locals_volatile (void *);
1054
1055 /* In c-ppoutput.c  */
1056 extern void init_pp_output (FILE *);
1057 extern void preprocess_file (cpp_reader *);
1058 extern void pp_file_change (const struct line_map *);
1059 extern void pp_dir_change (cpp_reader *, const char *);
1060 extern bool check_missing_format_attribute (tree, tree);
1061
1062 /* In c-omp.c  */
1063 extern tree c_finish_omp_master (location_t, tree);
1064 extern tree c_finish_omp_critical (location_t, tree, tree);
1065 extern tree c_finish_omp_ordered (location_t, tree);
1066 extern void c_finish_omp_barrier (location_t);
1067 extern tree c_finish_omp_atomic (location_t, enum tree_code, tree, tree);
1068 extern void c_finish_omp_flush (location_t);
1069 extern void c_finish_omp_taskwait (location_t);
1070 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1071 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1072 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1073
1074 /* Not in c-omp.c; provided by the front end.  */
1075 extern bool c_omp_sharing_predetermined (tree);
1076 extern tree c_omp_remap_decl (tree, bool);
1077 extern void record_types_used_by_current_var_decl (tree);
1078
1079 #endif /* ! GCC_C_COMMON_H */