gcc/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
   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 /* Usage of TREE_LANG_FLAG_?:
  30    0: TREE_NEGATED_INT (in INTEGER_CST).
  31       IDENTIFIER_MARKED (used by search routines).
  32       DECL_PRETTY_FUNCTION_P (in VAR_DECL)
  33       C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
  34    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  35       STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
  36       C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
  37    2: unused
  38    3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
  39    4: unused
  40 */
  41
  42 /* Reserved identifiers.  This is the union of all the keywords for C,
  43    C++, and Objective-C.  All the type modifiers have to be in one
  44    block at the beginning, because they are used as mask bits.  There
  45    are 27 type modifiers; if we add many more we will have to redesign
  46    the mask mechanism.  */
  47
  48 enum rid
  49 {
  50   /* Modifiers: */
  51   /* C, in empirical order of frequency.  */
  52   RID_STATIC = 0,
  53   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  54   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  55   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  56
  57   /* C extensions */
  58   RID_COMPLEX, RID_THREAD, RID_SAT,
  59
  60   /* C++ */
  61   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  62
  63   /* ObjC */
  64   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  65
  66   /* C */
  67   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  68   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  69   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  70   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  71   RID_SIZEOF,
  72
  73   /* C extensions */
  74   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
  75   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
  76   RID_TYPES_COMPATIBLE_P,
  77   RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
  78   RID_FRACT, RID_ACCUM,
  79
  80   /* This means to warn that this is a C++ keyword, and then treat it
  81      as a normal identifier.  */
  82   RID_CXX_COMPAT_WARN,
  83
  84   /* Too many ways of getting the name of a function as a string */
  85   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
  86
  87   /* C++ */
  88   RID_BOOL,     RID_WCHAR,    RID_CLASS,
  89   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
  90   RID_TEMPLATE, RID_NULL,     RID_CATCH,
  91   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
  92   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
  93   RID_THIS,     RID_THROW,    RID_TRUE,
  94   RID_TRY,      RID_TYPENAME, RID_TYPEID,
  95   RID_USING,    RID_CHAR16,   RID_CHAR32,
  96
  97   /* casts */
  98   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
  99
 100   /* C++ extensions */
 101   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 102   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 103   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 104   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
 105   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 106   RID_IS_CONVERTIBLE_TO,       RID_IS_CLASS,
 107   RID_IS_EMPTY,                RID_IS_ENUM,
 108   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 109   RID_IS_UNION,
 110
 111   /* C++0x */
 112   RID_STATIC_ASSERT, RID_DECLTYPE,
 113
 114   /* Objective-C */
 115   RID_AT_ENCODE,   RID_AT_END,
 116   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 117   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
 118   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 119   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 120   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 121   RID_AT_INTERFACE,
 122   RID_AT_IMPLEMENTATION,
 123
 124   RID_MAX,
 125
 126   RID_FIRST_MODIFIER = RID_STATIC,
 127   RID_LAST_MODIFIER = RID_ONEWAY,
 128
 129   RID_FIRST_CXX0X = RID_STATIC_ASSERT,
 130   RID_LAST_CXX0X = RID_DECLTYPE,
 131   RID_FIRST_AT = RID_AT_ENCODE,
 132   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 133   RID_FIRST_PQ = RID_IN,
 134   RID_LAST_PQ = RID_ONEWAY
 135 };
 136
 137 #define OBJC_IS_AT_KEYWORD(rid) \
 138   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 139    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 140
 141 #define OBJC_IS_PQ_KEYWORD(rid) \
 142   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 143    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 144
 145 /* The elements of `ridpointers' are identifier nodes for the reserved
 146    type names and storage classes.  It is indexed by a RID_... value.  */
 147 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 148
 149 /* Standard named or nameless data types of the C compiler.  */
 150
 151 enum c_tree_index
 152 {
 153     CTI_CHAR16_TYPE,
 154     CTI_CHAR32_TYPE,
 155     CTI_WCHAR_TYPE,
 156     CTI_UNDERLYING_WCHAR_TYPE,
 157     CTI_WINT_TYPE,
 158     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 159     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 160     CTI_INTMAX_TYPE,
 161     CTI_UINTMAX_TYPE,
 162     CTI_WIDEST_INT_LIT_TYPE,
 163     CTI_WIDEST_UINT_LIT_TYPE,
 164
 165     /* Types for <stdint.h>, that may not be defined on all
 166        targets.  */
 167     CTI_SIG_ATOMIC_TYPE,
 168     CTI_INT8_TYPE,
 169     CTI_INT16_TYPE,
 170     CTI_INT32_TYPE,
 171     CTI_INT64_TYPE,
 172     CTI_UINT8_TYPE,
 173     CTI_UINT16_TYPE,
 174     CTI_UINT32_TYPE,
 175     CTI_UINT64_TYPE,
 176     CTI_INT_LEAST8_TYPE,
 177     CTI_INT_LEAST16_TYPE,
 178     CTI_INT_LEAST32_TYPE,
 179     CTI_INT_LEAST64_TYPE,
 180     CTI_UINT_LEAST8_TYPE,
 181     CTI_UINT_LEAST16_TYPE,
 182     CTI_UINT_LEAST32_TYPE,
 183     CTI_UINT_LEAST64_TYPE,
 184     CTI_INT_FAST8_TYPE,
 185     CTI_INT_FAST16_TYPE,
 186     CTI_INT_FAST32_TYPE,
 187     CTI_INT_FAST64_TYPE,
 188     CTI_UINT_FAST8_TYPE,
 189     CTI_UINT_FAST16_TYPE,
 190     CTI_UINT_FAST32_TYPE,
 191     CTI_UINT_FAST64_TYPE,
 192     CTI_INTPTR_TYPE,
 193     CTI_UINTPTR_TYPE,
 194
 195     CTI_CHAR_ARRAY_TYPE,
 196     CTI_CHAR16_ARRAY_TYPE,
 197     CTI_CHAR32_ARRAY_TYPE,
 198     CTI_WCHAR_ARRAY_TYPE,
 199     CTI_INT_ARRAY_TYPE,
 200     CTI_STRING_TYPE,
 201     CTI_CONST_STRING_TYPE,
 202
 203     /* Type for boolean expressions (bool in C++, int in C).  */
 204     CTI_TRUTHVALUE_TYPE,
 205     CTI_TRUTHVALUE_TRUE,
 206     CTI_TRUTHVALUE_FALSE,
 207
 208     CTI_DEFAULT_FUNCTION_TYPE,
 209
 210     /* These are not types, but we have to look them up all the time.  */
 211     CTI_FUNCTION_NAME_DECL,
 212     CTI_PRETTY_FUNCTION_NAME_DECL,
 213     CTI_C99_FUNCTION_NAME_DECL,
 214     CTI_SAVED_FUNCTION_NAME_DECLS,
 215
 216     CTI_VOID_ZERO,
 217
 218     CTI_NULL,
 219
 220     CTI_MAX
 221 };
 222
 223 #define C_CPP_HASHNODE(id) \
 224   (&(((struct c_common_identifier *) (id))->node))
 225 #define C_RID_CODE(id) \
 226   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 227 #define C_SET_RID_CODE(id, code) \
 228   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 229
 230 /* Identifier part common to the C front ends.  Inherits from
 231    tree_identifier, despite appearances.  */
 232 struct c_common_identifier GTY(())
 233 {
 234   struct tree_common common;
 235   struct cpp_hashnode node;
 236 };
 237
 238 /* An entry in the reserved keyword table.  */
 239
 240 struct c_common_resword
 241 {
 242   const char *const word;
 243   ENUM_BITFIELD(rid) const rid : 16;
 244   const unsigned int disable   : 16;
 245 };
 246
 247 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 248    mask) is _true_.  Thus for keywords which are present in all
 249    languages the disable field is zero.  */
 250
 251 #define D_CONLY         0x001   /* C only (not in C++).  */
 252 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 253 #define D_C99           0x004   /* In C, C99 only.  */
 254 #define D_CXX0X         0x008   /* In C++, C++0X only.  */
 255 #define D_EXT           0x010   /* GCC extension.  */
 256 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 257 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 258 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 259 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 260 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 261
 262 /* The reserved keyword table.  */
 263 extern const struct c_common_resword c_common_reswords[];
 264
 265 /* The number of items in the reserved keyword table.  */
 266 extern const unsigned int num_c_common_reswords;
 267
 268 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 269 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 270 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 271 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 272 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 273 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 274 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 275 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 276 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 277 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 278 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 279
 280 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 281 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 282 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 283 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 284 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 285 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 286 #define uint16_type_node                c_global_trees[CTI_UINT16_TYPE]
 287 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 288 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 289 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 290 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 291 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 292 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 293 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 294 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 295 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 296 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 297 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 298 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 299 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 300 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 301 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 302 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 303 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 304 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 305 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 306 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 307
 308 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 309 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 310 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 311
 312 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 313 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 314 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 315 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 316 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 317 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 318 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 319
 320 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 321
 322 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 323 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 324 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 325 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 326
 327 /* A node for `((void) 0)'.  */
 328 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 329
 330 /* The node for C++ `__null'.  */
 331 #define null_node                       c_global_trees[CTI_NULL]
 332
 333 extern GTY(()) tree c_global_trees[CTI_MAX];
 334
 335 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 336    tree for size reasons.  */
 337 struct sorted_fields_type GTY(())
 338 {
 339   int len;
 340   tree GTY((length ("%h.len"))) elts[1];
 341 };
 342
 343 /* Mark which labels are explicitly declared.
 344    These may be shadowed, and may be referenced from nested functions.  */
 345 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 346
 347 typedef enum c_language_kind
 348 {
 349   clk_c         = 0,            /* C90, C94 or C99 */
 350   clk_objc      = 1,            /* clk_c with ObjC features.  */
 351   clk_cxx       = 2,            /* ANSI/ISO C++ */
 352   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 353 }
 354 c_language_kind;
 355
 356 /* To test for a specific language use c_language, defined by each
 357    front end.  For "ObjC features" or "not C++" use the macros.  */
 358 extern c_language_kind c_language;
 359
 360 #define c_dialect_cxx()         (c_language & clk_cxx)
 361 #define c_dialect_objc()        (c_language & clk_objc)
 362
 363 /* Information about a statement tree.  */
 364
 365 struct stmt_tree_s GTY(()) {
 366   /* The current statement list being collected.  */
 367   tree x_cur_stmt_list;
 368
 369   /* In C++, Nonzero if we should treat statements as full
 370      expressions.  In particular, this variable is no-zero if at the
 371      end of a statement we should destroy any temporaries created
 372      during that statement.  Similarly, if, at the end of a block, we
 373      should destroy any local variables in this block.  Normally, this
 374      variable is nonzero, since those are the normal semantics of
 375      C++.
 376
 377      However, in order to represent aggregate initialization code as
 378      tree structure, we use statement-expressions.  The statements
 379      within the statement expression should not result in cleanups
 380      being run until the entire enclosing statement is complete.
 381
 382      This flag has no effect in C.  */
 383   int stmts_are_full_exprs_p;
 384 };
 385
 386 typedef struct stmt_tree_s *stmt_tree;
 387
 388 /* Global state pertinent to the current function.  Some C dialects
 389    extend this structure with additional fields.  */
 390
 391 struct c_language_function GTY(()) {
 392   /* While we are parsing the function, this contains information
 393      about the statement-tree that we are building.  */
 394   struct stmt_tree_s x_stmt_tree;
 395 };
 396
 397 /* When building a statement-tree, this is the current statement list
 398    being collected.  It's TREE_CHAIN is a back-pointer to the previous
 399    statement list.  */
 400
 401 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
 402
 403 /* Language-specific hooks.  */
 404
 405 /* If non-NULL, this function is called after a precompile header file
 406    is loaded.  */
 407 extern void (*lang_post_pch_load) (void);
 408
 409 extern void push_file_scope (void);
 410 extern void pop_file_scope (void);
 411 extern stmt_tree current_stmt_tree (void);
 412 extern tree push_stmt_list (void);
 413 extern tree pop_stmt_list (tree);
 414 extern tree add_stmt (tree);
 415 extern void push_cleanup (tree, tree, bool);
 416 extern tree pushdecl_top_level (tree);
 417 extern tree pushdecl (tree);
 418 extern tree build_modify_expr (location_t, tree, enum tree_code, tree);
 419 extern tree build_indirect_ref (location_t, tree, const char *);
 420
 421 extern int c_expand_decl (tree);
 422
 423 extern int field_decl_cmp (const void *, const void *);
 424 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 425                                   void *);
 426 extern bool has_c_linkage (const_tree decl);
 427 \f
 428 /* Switches common to the C front ends.  */
 429
 430 /* Nonzero if prepreprocessing only.  */
 431
 432 extern int flag_preprocess_only;
 433
 434 /* Zero means that faster, ...NonNil variants of objc_msgSend...
 435    calls will be used in ObjC; passing nil receivers to such calls
 436    will most likely result in crashes.  */
 437 extern int flag_nil_receivers;
 438
 439 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
 440    @try, etc.) in source code.  */
 441 extern int flag_objc_exceptions;
 442
 443 /* Nonzero means that we generate NeXT setjmp based exceptions.  */
 444 extern int flag_objc_sjlj_exceptions;
 445
 446 /* Nonzero means that code generation will be altered to support
 447    "zero-link" execution.  This currently affects ObjC only, but may
 448    affect other languages in the future.  */
 449 extern int flag_zero_link;
 450
 451 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
 452    unit.  It will inform the ObjC runtime that class definition(s) herein
 453    contained are to replace one(s) previously loaded.  */
 454 extern int flag_replace_objc_classes;
 455
 456 /* Nonzero means don't output line number information.  */
 457
 458 extern char flag_no_line_commands;
 459
 460 /* Nonzero causes -E output not to be done, but directives such as
 461    #define that have side effects are still obeyed.  */
 462
 463 extern char flag_no_output;
 464
 465 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 466    'N' or 'U' of the command line switch.  */
 467
 468 extern char flag_dump_macros;
 469
 470 /* Nonzero means pass #include lines through to the output.  */
 471
 472 extern char flag_dump_includes;
 473
 474 /* Nonzero means process PCH files while preprocessing.  */
 475
 476 extern bool flag_pch_preprocess;
 477
 478 /* The file name to which we should write a precompiled header, or
 479    NULL if no header will be written in this compile.  */
 480
 481 extern const char *pch_file;
 482
 483 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 484    user's namespace.  */
 485
 486 extern int flag_iso;
 487
 488 /* Nonzero if -undef was given.  It suppresses target built-in macros
 489    and assertions.  */
 490
 491 extern int flag_undef;
 492
 493 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 494
 495 extern int flag_no_builtin;
 496
 497 /* Nonzero means don't recognize the non-ANSI builtin functions.
 498    -ansi sets this.  */
 499
 500 extern int flag_no_nonansi_builtin;
 501
 502 /* Nonzero means give `double' the same size as `float'.  */
 503
 504 extern int flag_short_double;
 505
 506 /* Nonzero means give `wchar_t' the same size as `short'.  */
 507
 508 extern int flag_short_wchar;
 509
 510 /* Nonzero means allow implicit conversions between vectors with
 511    differing numbers of subparts and/or differing element types.  */
 512 extern int flag_lax_vector_conversions;
 513
 514 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 515 extern int flag_ms_extensions;
 516
 517 /* Nonzero means don't recognize the keyword `asm'.  */
 518
 519 extern int flag_no_asm;
 520
 521 /* Nonzero means give string constants the type `const char *', as mandated
 522    by the standard.  */
 523
 524 extern int flag_const_strings;
 525
 526 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 527
 528 extern int flag_signed_bitfields;
 529
 530 /* Warn about #pragma directives that are not recognized.  */
 531
 532 extern int warn_unknown_pragmas; /* Tri state variable.  */
 533
 534 /* Warn about format/argument anomalies in calls to formatted I/O functions
 535    (*printf, *scanf, strftime, strfmon, etc.).  */
 536
 537 extern int warn_format;
 538
 539
 540 /* C/ObjC language option variables.  */
 541
 542
 543 /* Nonzero means allow type mismatches in conditional expressions;
 544    just make their values `void'.  */
 545
 546 extern int flag_cond_mismatch;
 547
 548 /* Nonzero means enable C89 Amendment 1 features.  */
 549
 550 extern int flag_isoc94;
 551
 552 /* Nonzero means use the ISO C99 dialect of C.  */
 553
 554 extern int flag_isoc99;
 555
 556 /* Nonzero means that we have builtin functions, and main is an int.  */
 557
 558 extern int flag_hosted;
 559
 560 /* ObjC language option variables.  */
 561
 562
 563 /* Open and close the file for outputting class declarations, if
 564    requested (ObjC).  */
 565
 566 extern int flag_gen_declaration;
 567
 568 /* Tells the compiler that this is a special run.  Do not perform any
 569    compiling, instead we are to test some platform dependent features
 570    and output a C header file with appropriate definitions.  */
 571
 572 extern int print_struct_values;
 573
 574 /* ???.  Undocumented.  */
 575
 576 extern const char *constant_string_class_name;
 577
 578
 579 /* C++ language option variables.  */
 580
 581
 582 /* Nonzero means don't recognize any extension keywords.  */
 583
 584 extern int flag_no_gnu_keywords;
 585
 586 /* Nonzero means do emit exported implementations of functions even if
 587    they can be inlined.  */
 588
 589 extern int flag_implement_inlines;
 590
 591 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 592
 593 extern int flag_implicit_templates;
 594
 595 /* Nonzero means that implicit instantiations of inline templates will be
 596    emitted if needed, even if instantiations of non-inline templates
 597    aren't.  */
 598
 599 extern int flag_implicit_inline_templates;
 600
 601 /* Nonzero means generate separate instantiation control files and
 602    juggle them at link time.  */
 603
 604 extern int flag_use_repository;
 605
 606 /* Nonzero if we want to issue diagnostics that the standard says are not
 607    required.  */
 608
 609 extern int flag_optional_diags;
 610
 611 /* Nonzero means we should attempt to elide constructors when possible.  */
 612
 613 extern int flag_elide_constructors;
 614
 615 /* Nonzero means that member functions defined in class scope are
 616    inline by default.  */
 617
 618 extern int flag_default_inline;
 619
 620 /* Controls whether compiler generates 'type descriptor' that give
 621    run-time type information.  */
 622
 623 extern int flag_rtti;
 624
 625 /* Nonzero if we want to conserve space in the .o files.  We do this
 626    by putting uninitialized data and runtime initialized data into
 627    .common instead of .data at the expense of not flagging multiple
 628    definitions.  */
 629
 630 extern int flag_conserve_space;
 631
 632 /* Nonzero if we want to obey access control semantics.  */
 633
 634 extern int flag_access_control;
 635
 636 /* Nonzero if we want to check the return value of new and avoid calling
 637    constructors if it is a null pointer.  */
 638
 639 extern int flag_check_new;
 640
 641 /* The supported C++ dialects.  */
 642
 643 enum cxx_dialect {
 644   /* C++98  */
 645   cxx98,
 646   /* Experimental features that are likely to become part of
 647      C++0x.  */
 648   cxx0x
 649 };
 650
 651 /* The C++ dialect being used. C++98 is the default.  */
 652 extern enum cxx_dialect cxx_dialect;
 653
 654 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 655    initialization variables.
 656    0: Old rules, set by -fno-for-scope.
 657    2: New ISO rules, set by -ffor-scope.
 658    1: Try to implement new ISO rules, but with backup compatibility
 659    (and warnings).  This is the default, for now.  */
 660
 661 extern int flag_new_for_scope;
 662
 663 /* Nonzero if we want to emit defined symbols with common-like linkage as
 664    weak symbols where possible, in order to conform to C++ semantics.
 665    Otherwise, emit them as local symbols.  */
 666
 667 extern int flag_weak;
 668
 669 /* 0 means we want the preprocessor to not emit line directives for
 670    the current working directory.  1 means we want it to do it.  -1
 671    means we should decide depending on whether debugging information
 672    is being emitted or not.  */
 673
 674 extern int flag_working_directory;
 675
 676 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 677    destructors for local statics and global objects.  */
 678
 679 extern int flag_use_cxa_atexit;
 680
 681 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
 682    logic.  */
 683
 684 extern int flag_use_cxa_get_exception_ptr;
 685
 686 /* Nonzero means to implement standard semantics for exception
 687    specifications, calling unexpected if an exception is thrown that
 688    doesn't match the specification.  Zero means to treat them as
 689    assertions and optimize accordingly, but not check them.  */
 690
 691 extern int flag_enforce_eh_specs;
 692
 693 /* Nonzero (the default) means to generate thread-safe code for
 694    initializing local statics.  */
 695
 696 extern int flag_threadsafe_statics;
 697
 698 /* Nonzero means warn about implicit declarations.  */
 699
 700 extern int warn_implicit;
 701
 702 /* Warn about using __null (as NULL in C++) as sentinel.  For code compiled
 703    with GCC this doesn't matter as __null is guaranteed to have the right
 704    size.  */
 705
 706 extern int warn_strict_null_sentinel;
 707
 708 /* Maximum template instantiation depth.  This limit is rather
 709    arbitrary, but it exists to limit the time it takes to notice
 710    infinite template instantiations.  */
 711
 712 extern int max_tinst_depth;
 713
 714 /* Nonzero means the expression being parsed will never be evaluated.
 715    This is a count, since unevaluated expressions can nest.  */
 716
 717 extern int skip_evaluation;
 718
 719 /* Whether lexing has been completed, so subsequent preprocessor
 720    errors should use the compiler's input_location.  */
 721
 722 extern bool done_lexing;
 723
 724 /* C types are partitioned into three subsets: object, function, and
 725    incomplete types.  */
 726 #define C_TYPE_OBJECT_P(type) \
 727   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 728
 729 #define C_TYPE_INCOMPLETE_P(type) \
 730   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 731
 732 #define C_TYPE_FUNCTION_P(type) \
 733   (TREE_CODE (type) == FUNCTION_TYPE)
 734
 735 /* For convenience we define a single macro to identify the class of
 736    object or incomplete types.  */
 737 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 738   (!C_TYPE_FUNCTION_P (type))
 739
 740 /* Attribute table common to the C front ends.  */
 741 extern const struct attribute_spec c_common_attribute_table[];
 742 extern const struct attribute_spec c_common_format_attribute_table[];
 743
 744 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 745    ID is the identifier to use, NAME is the string.
 746    TYPE_DEP indicates whether it depends on type of the function or not
 747    (i.e. __PRETTY_FUNCTION__).  */
 748
 749 extern tree (*make_fname_decl) (tree, int);
 750
 751 extern tree identifier_global_value (tree);
 752 extern void record_builtin_type (enum rid, const char *, tree);
 753 extern tree build_void_list_node (void);
 754 extern void start_fname_decls (void);
 755 extern void finish_fname_decls (void);
 756 extern const char *fname_as_string (int);
 757 extern tree fname_decl (location_t, unsigned, tree);
 758
 759 extern void check_function_arguments (tree, int, tree *, tree);
 760 extern void check_function_arguments_recurse (void (*)
 761                                               (void *, tree,
 762                                                unsigned HOST_WIDE_INT),
 763                                               void *, tree,
 764                                               unsigned HOST_WIDE_INT);
 765 extern bool check_builtin_function_arguments (tree, int, tree *);
 766 extern void check_function_format (tree, int, tree *);
 767 extern void set_Wformat (int);
 768 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 769 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 770 extern int c_common_handle_option (size_t code, const char *arg, int value);
 771 extern bool c_common_missing_argument (const char *opt, size_t code);
 772 extern tree c_common_type_for_mode (enum machine_mode, int);
 773 extern tree c_common_type_for_size (unsigned int, int);
 774 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 775                                                 int, int);
 776 extern tree c_common_unsigned_type (tree);
 777 extern tree c_common_signed_type (tree);
 778 extern tree c_common_signed_or_unsigned_type (int, tree);
 779 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 780 extern bool decl_with_nonnull_addr_p (const_tree);
 781 extern tree c_fully_fold (tree, bool, bool *);
 782 extern tree decl_constant_value_for_optimization (tree);
 783 extern tree c_save_expr (tree);
 784 extern tree c_common_truthvalue_conversion (location_t, tree);
 785 extern void c_apply_type_quals_to_decl (int, tree);
 786 extern tree c_sizeof_or_alignof_type (tree, bool, int);
 787 extern tree c_alignof_expr (tree);
 788 /* Print an error message for invalid operands to arith operation CODE.
 789    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 790 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 791 extern tree fix_string_type (tree);
 792 struct varray_head_tag;
 793 extern void constant_expression_warning (tree);
 794 extern void constant_expression_error (tree);
 795 extern bool strict_aliasing_warning (tree, tree, tree);
 796 extern void warnings_for_convert_and_check (tree, tree, tree);
 797 extern tree convert_and_check (tree, tree);
 798 extern void overflow_warning (tree);
 799 extern void warn_logical_operator (enum tree_code, tree, tree);
 800 extern void check_main_parameter_types (tree decl);
 801 extern bool c_determine_visibility (tree);
 802 extern bool same_scalar_type_ignoring_signedness (tree, tree);
 803
 804 #define c_sizeof(T)  c_sizeof_or_alignof_type (T, true, 1)
 805 #define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1)
 806
 807 /* Subroutine of build_binary_op, used for certain operations.  */
 808 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 809
 810 /* Subroutine of build_binary_op, used for comparison operations.
 811    See if the operands have both been converted from subword integer types
 812    and, if so, perhaps change them both back to their original type.  */
 813 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 814
 815 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
 816
 817 /* Add qualifiers to a type, in the fashion for C.  */
 818 extern tree c_build_qualified_type (tree, int);
 819
 820 /* Build tree nodes and builtin functions common to both C and C++ language
 821    frontends.  */
 822 extern void c_common_nodes_and_builtins (void);
 823
 824 extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
 825
 826 extern void disable_builtin_function (const char *);
 827
 828 extern void set_compound_literal_name (tree decl);
 829
 830 extern tree build_va_arg (tree, tree);
 831
 832 extern unsigned int c_common_init_options (unsigned int, const char **);
 833 extern bool c_common_post_options (const char **);
 834 extern bool c_common_init (void);
 835 extern void c_common_finish (void);
 836 extern void c_common_parse_file (int);
 837 extern alias_set_type c_common_get_alias_set (tree);
 838 extern void c_register_builtin_type (tree, const char*);
 839 extern bool c_promoting_integer_type_p (const_tree);
 840 extern int self_promoting_args_p (const_tree);
 841 extern tree strip_pointer_operator (tree);
 842 extern tree strip_pointer_or_array_types (tree);
 843 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 844
 845 /* This is the basic parsing function.  */
 846 extern void c_parse_file (void);
 847 /* This is misnamed, it actually performs end-of-compilation processing.  */
 848 extern void finish_file (void);
 849
 850
 851 /* These macros provide convenient access to the various _STMT nodes.  */
 852
 853 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 854    if a statement expression.  */
 855 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 856   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 857
 858 /* Nonzero if a label has been added to the statement list.  */
 859 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 860   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 861
 862 /* C_MAYBE_CONST_EXPR accessors.  */
 863 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 864   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 865 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 866   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 867 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 868   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 869 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 870   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 871 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 872   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 873    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 874        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 875            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 876
 877 /* C_MAYBE_CONST_EXPR accessors.  */
 878 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 879   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 880 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 881   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 882 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 883   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 884 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 885   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 886 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 887   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 888    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 889        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 890            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 891
 892 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 893 #define DECL_C_BIT_FIELD(NODE) \
 894   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 895 #define SET_DECL_C_BIT_FIELD(NODE) \
 896   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 897 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 898   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 899
 900 extern tree do_case (tree, tree);
 901 extern tree build_stmt (enum tree_code, ...);
 902 extern tree build_case_label (tree, tree, tree);
 903
 904 /* These functions must be defined by each front-end which implements
 905    a variant of the C language.  They are used in c-common.c.  */
 906
 907 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 908 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 909 extern tree perform_integral_promotions (tree);
 910
 911 /* These functions must be defined by each front-end which implements
 912    a variant of the C language.  They are used by port files.  */
 913
 914 extern tree default_conversion (tree);
 915
 916 /* Given two integer or real types, return the type for their sum.
 917    Given two compatible ANSI C types, returns the merged type.  */
 918
 919 extern tree common_type (tree, tree);
 920
 921 extern tree decl_constant_value (tree);
 922
 923 /* Handle increment and decrement of boolean types.  */
 924 extern tree boolean_increment (enum tree_code, tree);
 925
 926 extern int case_compare (splay_tree_key, splay_tree_key);
 927
 928 extern tree c_add_case_label (splay_tree, tree, tree, tree, tree);
 929
 930 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 931
 932 extern tree build_function_call (tree, tree);
 933
 934 extern tree resolve_overloaded_builtin (tree, tree);
 935
 936 extern tree finish_label_address_expr (tree, location_t);
 937
 938 /* Same function prototype, but the C and C++ front ends have
 939    different implementations.  Used in c-common.c.  */
 940 extern tree lookup_label (tree);
 941 extern tree lookup_name (tree);
 942
 943 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 944 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 945
 946 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 947
 948 extern void init_c_lex (void);
 949
 950 extern void c_cpp_builtins (cpp_reader *);
 951 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
 952
 953 /* Positive if an implicit `extern "C"' scope has just been entered;
 954    negative if such a scope has just been exited.  */
 955 extern GTY(()) int pending_lang_change;
 956
 957 /* Information recorded about each file examined during compilation.  */
 958
 959 struct c_fileinfo
 960 {
 961   int time;     /* Time spent in the file.  */
 962
 963   /* Flags used only by C++.
 964      INTERFACE_ONLY nonzero means that we are in an "interface" section
 965      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
 966      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
 967      INTERFACE_ONLY is zero, it means that we are responsible for
 968      exporting definitions that others might need.  */
 969   short interface_only;
 970   short interface_unknown;
 971 };
 972
 973 struct c_fileinfo *get_fileinfo (const char *);
 974 extern void dump_time_statistics (void);
 975
 976 extern bool c_dump_tree (void *, tree);
 977
 978 extern void c_warn_unused_result (gimple_seq);
 979
 980 extern void verify_sequence_points (tree);
 981
 982 extern tree fold_offsetof (tree, tree);
 983
 984 /* Places where an lvalue, or modifiable lvalue, may be required.
 985    Used to select diagnostic messages in lvalue_error and
 986    readonly_error.  */
 987 enum lvalue_use {
 988   lv_assign,
 989   lv_increment,
 990   lv_decrement,
 991   lv_addressof,
 992   lv_asm
 993 };
 994
 995 extern void lvalue_error (enum lvalue_use);
 996
 997 extern int complete_array_type (tree *, tree, bool);
 998
 999 extern tree builtin_type_for_size (int, bool);
1000
1001 extern void warn_array_subscript_with_type_char (tree);
1002 extern void warn_about_parentheses (enum tree_code,
1003                                     enum tree_code, tree,
1004                                     enum tree_code, tree);
1005 extern void warn_for_unused_label (tree label);
1006 extern void warn_for_div_by_zero (location_t, tree divisor);
1007 extern void warn_for_sign_compare (location_t,
1008                                    tree orig_op0, tree orig_op1,
1009                                    tree op0, tree op1,
1010                                    tree result_type,
1011                                    enum tree_code resultcode);
1012 extern void set_underlying_type (tree x);
1013 extern bool is_typedef_decl (tree x);
1014
1015 /* In c-gimplify.c  */
1016 extern void c_genericize (tree);
1017 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1018 extern tree c_build_bind_expr (tree, tree);
1019
1020 /* In c-pch.c  */
1021 extern void pch_init (void);
1022 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1023 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1024                                const char *orig);
1025 extern void c_common_write_pch (void);
1026 extern void c_common_no_more_pch (void);
1027 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1028 extern void c_common_print_pch_checksum (FILE *f);
1029
1030 /* In *-checksum.c */
1031 extern const unsigned char executable_checksum[16];
1032
1033 /* In c-cppbuiltin.c  */
1034 extern void builtin_define_std (const char *macro);
1035 extern void builtin_define_with_value (const char *, const char *, int);
1036 extern void c_stddef_cpp_builtins (void);
1037 extern void fe_file_change (const struct line_map *);
1038 extern void c_parse_error (const char *, enum cpp_ttype, tree);
1039
1040 /* Objective-C / Objective-C++ entry points.  */
1041
1042 /* The following ObjC/ObjC++ functions are called by the C and/or C++
1043    front-ends; they all must have corresponding stubs in stub-objc.c.  */
1044 extern tree objc_is_class_name (tree);
1045 extern tree objc_is_object_ptr (tree);
1046 extern void objc_check_decl (tree);
1047 extern int objc_is_reserved_word (tree);
1048 extern bool objc_compare_types (tree, tree, int, tree);
1049 extern void objc_volatilize_decl (tree);
1050 extern bool objc_type_quals_match (tree, tree);
1051 extern tree objc_rewrite_function_call (tree, tree);
1052 extern tree objc_message_selector (void);
1053 extern tree objc_lookup_ivar (tree, tree);
1054 extern void objc_clear_super_receiver (void);
1055 extern int objc_is_public (tree, tree);
1056 extern tree objc_is_id (tree);
1057 extern void objc_declare_alias (tree, tree);
1058 extern void objc_declare_class (tree);
1059 extern void objc_declare_protocols (tree);
1060 extern tree objc_build_message_expr (tree);
1061 extern tree objc_finish_message_expr (tree, tree, tree);
1062 extern tree objc_build_selector_expr (tree);
1063 extern tree objc_build_protocol_expr (tree);
1064 extern tree objc_build_encode_expr (tree);
1065 extern tree objc_build_string_object (tree);
1066 extern tree objc_get_protocol_qualified_type (tree, tree);
1067 extern tree objc_get_class_reference (tree);
1068 extern tree objc_get_class_ivars (tree);
1069 extern void objc_start_class_interface (tree, tree, tree);
1070 extern void objc_start_category_interface (tree, tree, tree);
1071 extern void objc_start_protocol (tree, tree);
1072 extern void objc_continue_interface (void);
1073 extern void objc_finish_interface (void);
1074 extern void objc_start_class_implementation (tree, tree);
1075 extern void objc_start_category_implementation (tree, tree);
1076 extern void objc_continue_implementation (void);
1077 extern void objc_finish_implementation (void);
1078 extern void objc_set_visibility (int);
1079 extern void objc_set_method_type (enum tree_code);
1080 extern tree objc_build_method_signature (tree, tree, tree, bool);
1081 extern void objc_add_method_declaration (tree);
1082 extern void objc_start_method_definition (tree);
1083 extern void objc_finish_method_definition (tree);
1084 extern void objc_add_instance_variable (tree);
1085 extern tree objc_build_keyword_decl (tree, tree, tree);
1086 extern tree objc_build_throw_stmt (tree);
1087 extern void objc_begin_try_stmt (location_t, tree);
1088 extern tree objc_finish_try_stmt (void);
1089 extern void objc_begin_catch_clause (tree);
1090 extern void objc_finish_catch_clause (void);
1091 extern void objc_build_finally_clause (location_t, tree);
1092 extern tree objc_build_synchronized (location_t, tree, tree);
1093 extern int objc_static_init_needed_p (void);
1094 extern tree objc_generate_static_init_call (tree);
1095 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1096
1097 /* The following are provided by the C and C++ front-ends, and called by
1098    ObjC/ObjC++.  */
1099 extern void *objc_get_current_scope (void);
1100 extern void objc_mark_locals_volatile (void *);
1101
1102 /* In c-ppoutput.c  */
1103 extern void init_pp_output (FILE *);
1104 extern void preprocess_file (cpp_reader *);
1105 extern void pp_file_change (const struct line_map *);
1106 extern void pp_dir_change (cpp_reader *, const char *);
1107 extern bool check_missing_format_attribute (tree, tree);
1108
1109 /* In c-omp.c  */
1110 extern tree c_finish_omp_master (tree);
1111 extern tree c_finish_omp_critical (tree, tree);
1112 extern tree c_finish_omp_ordered (tree);
1113 extern void c_finish_omp_barrier (void);
1114 extern tree c_finish_omp_atomic (enum tree_code, tree, tree);
1115 extern void c_finish_omp_flush (void);
1116 extern void c_finish_omp_taskwait (void);
1117 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1118 extern void c_split_parallel_clauses (tree, tree *, tree *);
1119 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1120
1121 /* Not in c-omp.c; provided by the front end.  */
1122 extern bool c_omp_sharing_predetermined (tree);
1123 extern tree c_omp_remap_decl (tree, bool);
1124
1125 /* In order for the format checking to accept the C frontend
1126    diagnostic framework extensions, you must include this file before
1127    toplev.h, not after.  The C front end formats are a subset of those
1128    for C++, so they are the appropriate set to use in common code;
1129    cp-tree.h overrides this for C++.  */
1130 #ifndef GCC_DIAG_STYLE
1131 #define GCC_DIAG_STYLE __gcc_cdiag__
1132 #endif
1133
1134 #endif /* ! GCC_C_COMMON_H */