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 /* In order for the format checking to accept the C frontend
  30    diagnostic framework extensions, you must include this file before
  31    toplev.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 #ifndef GCC_DIAG_STYLE
  35 #define GCC_DIAG_STYLE __gcc_cdiag__
  36 #endif
  37 #include "diagnostic-core.h"
  38
  39 /* Usage of TREE_LANG_FLAG_?:
  40    0: TREE_NEGATED_INT (in INTEGER_CST).
  41       IDENTIFIER_MARKED (used by search routines).
  42       DECL_PRETTY_FUNCTION_P (in VAR_DECL)
  43       C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
  44    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  45       STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
  46       C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
  47    2: unused
  48    3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
  49    4: unused
  50 */
  51
  52 /* Reserved identifiers.  This is the union of all the keywords for C,
  53    C++, and Objective-C.  All the type modifiers have to be in one
  54    block at the beginning, because they are used as mask bits.  There
  55    are 27 type modifiers; if we add many more we will have to redesign
  56    the mask mechanism.  */
  57
  58 enum rid
  59 {
  60   /* Modifiers: */
  61   /* C, in empirical order of frequency.  */
  62   RID_STATIC = 0,
  63   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  64   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  65   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  66
  67   /* C extensions */
  68   RID_COMPLEX, RID_THREAD, RID_SAT,
  69
  70   /* C++ */
  71   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  72
  73   /* ObjC */
  74   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  75
  76   /* C (reserved and imaginary types not implemented, so any use is a
  77      syntax error) */
  78   RID_IMAGINARY,
  79
  80   /* C */
  81   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  82   RID_INT128,
  83   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  84   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  85   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  86   RID_SIZEOF,
  87
  88   /* C extensions */
  89   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
  90   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
  91   RID_TYPES_COMPATIBLE_P,
  92   RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
  93   RID_FRACT, RID_ACCUM,
  94
  95   /* This means to warn that this is a C++ keyword, and then treat it
  96      as a normal identifier.  */
  97   RID_CXX_COMPAT_WARN,
  98
  99   /* Too many ways of getting the name of a function as a string */
 100   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
 101
 102   /* C++ */
 103   RID_BOOL,     RID_WCHAR,    RID_CLASS,
 104   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
 105   RID_TEMPLATE, RID_NULL,     RID_CATCH,
 106   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
 107   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
 108   RID_THIS,     RID_THROW,    RID_TRUE,
 109   RID_TRY,      RID_TYPENAME, RID_TYPEID,
 110   RID_USING,    RID_CHAR16,   RID_CHAR32,
 111
 112   /* casts */
 113   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
 114
 115   /* C++ extensions */
 116   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 117   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 118   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 119   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
 120   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 121   RID_IS_CONVERTIBLE_TO,       RID_IS_CLASS,
 122   RID_IS_EMPTY,                RID_IS_ENUM,
 123   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 124   RID_IS_STD_LAYOUT,           RID_IS_TRIVIAL,
 125   RID_IS_UNION,
 126
 127   /* C++0x */
 128   RID_CONSTEXPR, RID_DECLTYPE, RID_NULLPTR, RID_STATIC_ASSERT,
 129
 130   /* Objective-C */
 131   RID_AT_ENCODE,   RID_AT_END,
 132   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 133   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
 134   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 135   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 136   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 137   RID_AT_INTERFACE,
 138   RID_AT_IMPLEMENTATION,
 139
 140   /* Named address support, mapping the keyword to a particular named address
 141      number.  Named address space 0 is reserved for the generic address.  If
 142      there are more than 254 named addresses, the addr_space_t type will need
 143      to be grown from an unsigned char to unsigned short.  */
 144   RID_ADDR_SPACE_0,             /* generic address */
 145   RID_ADDR_SPACE_1,
 146   RID_ADDR_SPACE_2,
 147   RID_ADDR_SPACE_3,
 148   RID_ADDR_SPACE_4,
 149   RID_ADDR_SPACE_5,
 150   RID_ADDR_SPACE_6,
 151   RID_ADDR_SPACE_7,
 152   RID_ADDR_SPACE_8,
 153   RID_ADDR_SPACE_9,
 154   RID_ADDR_SPACE_10,
 155   RID_ADDR_SPACE_11,
 156   RID_ADDR_SPACE_12,
 157   RID_ADDR_SPACE_13,
 158   RID_ADDR_SPACE_14,
 159   RID_ADDR_SPACE_15,
 160
 161   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 162   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 163
 164   RID_MAX,
 165
 166   RID_FIRST_MODIFIER = RID_STATIC,
 167   RID_LAST_MODIFIER = RID_ONEWAY,
 168
 169   RID_FIRST_CXX0X = RID_CONSTEXPR,
 170   RID_LAST_CXX0X = RID_STATIC_ASSERT,
 171   RID_FIRST_AT = RID_AT_ENCODE,
 172   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 173   RID_FIRST_PQ = RID_IN,
 174   RID_LAST_PQ = RID_ONEWAY
 175 };
 176
 177 #define OBJC_IS_AT_KEYWORD(rid) \
 178   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 179    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 180
 181 #define OBJC_IS_PQ_KEYWORD(rid) \
 182   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 183    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 184
 185 /* The elements of `ridpointers' are identifier nodes for the reserved
 186    type names and storage classes.  It is indexed by a RID_... value.  */
 187 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 188
 189 /* Standard named or nameless data types of the C compiler.  */
 190
 191 enum c_tree_index
 192 {
 193     CTI_CHAR16_TYPE,
 194     CTI_CHAR32_TYPE,
 195     CTI_WCHAR_TYPE,
 196     CTI_UNDERLYING_WCHAR_TYPE,
 197     CTI_WINT_TYPE,
 198     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 199     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 200     CTI_INTMAX_TYPE,
 201     CTI_UINTMAX_TYPE,
 202     CTI_WIDEST_INT_LIT_TYPE,
 203     CTI_WIDEST_UINT_LIT_TYPE,
 204
 205     /* Types for <stdint.h>, that may not be defined on all
 206        targets.  */
 207     CTI_SIG_ATOMIC_TYPE,
 208     CTI_INT8_TYPE,
 209     CTI_INT16_TYPE,
 210     CTI_INT32_TYPE,
 211     CTI_INT64_TYPE,
 212     CTI_UINT8_TYPE,
 213     CTI_UINT16_TYPE,
 214     CTI_UINT32_TYPE,
 215     CTI_UINT64_TYPE,
 216     CTI_INT_LEAST8_TYPE,
 217     CTI_INT_LEAST16_TYPE,
 218     CTI_INT_LEAST32_TYPE,
 219     CTI_INT_LEAST64_TYPE,
 220     CTI_UINT_LEAST8_TYPE,
 221     CTI_UINT_LEAST16_TYPE,
 222     CTI_UINT_LEAST32_TYPE,
 223     CTI_UINT_LEAST64_TYPE,
 224     CTI_INT_FAST8_TYPE,
 225     CTI_INT_FAST16_TYPE,
 226     CTI_INT_FAST32_TYPE,
 227     CTI_INT_FAST64_TYPE,
 228     CTI_UINT_FAST8_TYPE,
 229     CTI_UINT_FAST16_TYPE,
 230     CTI_UINT_FAST32_TYPE,
 231     CTI_UINT_FAST64_TYPE,
 232     CTI_INTPTR_TYPE,
 233     CTI_UINTPTR_TYPE,
 234
 235     CTI_CHAR_ARRAY_TYPE,
 236     CTI_CHAR16_ARRAY_TYPE,
 237     CTI_CHAR32_ARRAY_TYPE,
 238     CTI_WCHAR_ARRAY_TYPE,
 239     CTI_INT_ARRAY_TYPE,
 240     CTI_STRING_TYPE,
 241     CTI_CONST_STRING_TYPE,
 242
 243     /* Type for boolean expressions (bool in C++, int in C).  */
 244     CTI_TRUTHVALUE_TYPE,
 245     CTI_TRUTHVALUE_TRUE,
 246     CTI_TRUTHVALUE_FALSE,
 247
 248     CTI_DEFAULT_FUNCTION_TYPE,
 249
 250     /* These are not types, but we have to look them up all the time.  */
 251     CTI_FUNCTION_NAME_DECL,
 252     CTI_PRETTY_FUNCTION_NAME_DECL,
 253     CTI_C99_FUNCTION_NAME_DECL,
 254     CTI_SAVED_FUNCTION_NAME_DECLS,
 255
 256     CTI_VOID_ZERO,
 257
 258     CTI_NULL,
 259
 260     CTI_MAX
 261 };
 262
 263 #define C_CPP_HASHNODE(id) \
 264   (&(((struct c_common_identifier *) (id))->node))
 265 #define C_RID_CODE(id) \
 266   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 267 #define C_SET_RID_CODE(id, code) \
 268   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 269
 270 /* Identifier part common to the C front ends.  Inherits from
 271    tree_identifier, despite appearances.  */
 272 struct GTY(()) c_common_identifier {
 273   struct tree_common common;
 274   struct cpp_hashnode node;
 275 };
 276
 277 /* An entry in the reserved keyword table.  */
 278
 279 struct c_common_resword
 280 {
 281   const char *const word;
 282   ENUM_BITFIELD(rid) const rid : 16;
 283   const unsigned int disable   : 16;
 284 };
 285
 286 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 287    mask) is _true_.  Thus for keywords which are present in all
 288    languages the disable field is zero.  */
 289
 290 #define D_CONLY         0x001   /* C only (not in C++).  */
 291 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 292 #define D_C99           0x004   /* In C, C99 only.  */
 293 #define D_CXX0X         0x008   /* In C++, C++0X only.  */
 294 #define D_EXT           0x010   /* GCC extension.  */
 295 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 296 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 297 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 298 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 299 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 300
 301 /* The reserved keyword table.  */
 302 extern const struct c_common_resword c_common_reswords[];
 303
 304 /* The number of items in the reserved keyword table.  */
 305 extern const unsigned int num_c_common_reswords;
 306
 307 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 308 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 309 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 310 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 311 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 312 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 313 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 314 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 315 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 316 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 317 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 318
 319 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 320 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 321 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 322 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 323 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 324 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 325 #define uint16_type_node                c_global_trees[CTI_UINT16_TYPE]
 326 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 327 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 328 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 329 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 330 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 331 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 332 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 333 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 334 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 335 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 336 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 337 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 338 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 339 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 340 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 341 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 342 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 343 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 344 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 345 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 346
 347 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 348 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 349 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 350
 351 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 352 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 353 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 354 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 355 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 356 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 357 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 358
 359 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 360
 361 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 362 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 363 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 364 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 365
 366 /* A node for `((void) 0)'.  */
 367 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 368
 369 /* The node for C++ `__null'.  */
 370 #define null_node                       c_global_trees[CTI_NULL]
 371
 372 extern GTY(()) tree c_global_trees[CTI_MAX];
 373
 374 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 375    tree for size reasons.  */
 376 struct GTY(()) sorted_fields_type {
 377   int len;
 378   tree GTY((length ("%h.len"))) elts[1];
 379 };
 380
 381 /* Mark which labels are explicitly declared.
 382    These may be shadowed, and may be referenced from nested functions.  */
 383 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 384
 385 typedef enum c_language_kind
 386 {
 387   clk_c         = 0,            /* C90, C94 or C99 */
 388   clk_objc      = 1,            /* clk_c with ObjC features.  */
 389   clk_cxx       = 2,            /* ANSI/ISO C++ */
 390   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 391 }
 392 c_language_kind;
 393
 394 /* To test for a specific language use c_language, defined by each
 395    front end.  For "ObjC features" or "not C++" use the macros.  */
 396 extern c_language_kind c_language;
 397
 398 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 399 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 400
 401 /* The various name of operator that appears in error messages. */
 402 typedef enum ref_operator {
 403   /* NULL */
 404   RO_NULL,
 405   /* array indexing */
 406   RO_ARRAY_INDEXING,
 407   /* unary * */
 408   RO_UNARY_STAR,
 409   /* -> */
 410   RO_ARROW,
 411   /* implicit conversion */
 412   RO_IMPLICIT_CONVERSION
 413 } ref_operator;
 414
 415 /* Information about a statement tree.  */
 416
 417 struct GTY(()) stmt_tree_s {
 418   /* The current statement list being collected.  */
 419   tree x_cur_stmt_list;
 420
 421   /* In C++, Nonzero if we should treat statements as full
 422      expressions.  In particular, this variable is no-zero if at the
 423      end of a statement we should destroy any temporaries created
 424      during that statement.  Similarly, if, at the end of a block, we
 425      should destroy any local variables in this block.  Normally, this
 426      variable is nonzero, since those are the normal semantics of
 427      C++.
 428
 429      However, in order to represent aggregate initialization code as
 430      tree structure, we use statement-expressions.  The statements
 431      within the statement expression should not result in cleanups
 432      being run until the entire enclosing statement is complete.
 433
 434      This flag has no effect in C.  */
 435   int stmts_are_full_exprs_p;
 436 };
 437
 438 typedef struct stmt_tree_s *stmt_tree;
 439
 440 /* Global state pertinent to the current function.  Some C dialects
 441    extend this structure with additional fields.  */
 442
 443 struct GTY(()) c_language_function {
 444   /* While we are parsing the function, this contains information
 445      about the statement-tree that we are building.  */
 446   struct stmt_tree_s x_stmt_tree;
 447 };
 448
 449 /* When building a statement-tree, this is the current statement list
 450    being collected.  It's TREE_CHAIN is a back-pointer to the previous
 451    statement list.  */
 452
 453 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
 454
 455 /* Language-specific hooks.  */
 456
 457 /* If non-NULL, this function is called after a precompile header file
 458    is loaded.  */
 459 extern void (*lang_post_pch_load) (void);
 460
 461 extern void push_file_scope (void);
 462 extern void pop_file_scope (void);
 463 extern stmt_tree current_stmt_tree (void);
 464 extern tree push_stmt_list (void);
 465 extern tree pop_stmt_list (tree);
 466 extern tree add_stmt (tree);
 467 extern void push_cleanup (tree, tree, bool);
 468 extern tree pushdecl_top_level (tree);
 469 extern tree pushdecl (tree);
 470 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 471                                location_t, tree, tree);
 472 extern tree build_indirect_ref (location_t, tree, ref_operator);
 473
 474 extern int c_expand_decl (tree);
 475
 476 extern int field_decl_cmp (const void *, const void *);
 477 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 478                                   void *);
 479 extern bool has_c_linkage (const_tree decl);
 480 \f
 481 /* Switches common to the C front ends.  */
 482
 483 /* Nonzero if prepreprocessing only.  */
 484
 485 extern int flag_preprocess_only;
 486
 487 /* Zero means that faster, ...NonNil variants of objc_msgSend...
 488    calls will be used in ObjC; passing nil receivers to such calls
 489    will most likely result in crashes.  */
 490 extern int flag_nil_receivers;
 491
 492 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
 493    @try, etc.) in source code.  */
 494 extern int flag_objc_exceptions;
 495
 496 /* Nonzero means that we generate NeXT setjmp based exceptions.  */
 497 extern int flag_objc_sjlj_exceptions;
 498
 499 /* Nonzero means that code generation will be altered to support
 500    "zero-link" execution.  This currently affects ObjC only, but may
 501    affect other languages in the future.  */
 502 extern int flag_zero_link;
 503
 504 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
 505    unit.  It will inform the ObjC runtime that class definition(s) herein
 506    contained are to replace one(s) previously loaded.  */
 507 extern int flag_replace_objc_classes;
 508
 509 /* Nonzero means don't output line number information.  */
 510
 511 extern char flag_no_line_commands;
 512
 513 /* Nonzero causes -E output not to be done, but directives such as
 514    #define that have side effects are still obeyed.  */
 515
 516 extern char flag_no_output;
 517
 518 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 519    'N' or 'U' of the command line switch.  */
 520
 521 extern char flag_dump_macros;
 522
 523 /* Nonzero means pass #include lines through to the output.  */
 524
 525 extern char flag_dump_includes;
 526
 527 /* Nonzero means process PCH files while preprocessing.  */
 528
 529 extern bool flag_pch_preprocess;
 530
 531 /* The file name to which we should write a precompiled header, or
 532    NULL if no header will be written in this compile.  */
 533
 534 extern const char *pch_file;
 535
 536 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 537    user's namespace.  */
 538
 539 extern int flag_iso;
 540
 541 /* Nonzero if -undef was given.  It suppresses target built-in macros
 542    and assertions.  */
 543
 544 extern int flag_undef;
 545
 546 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 547
 548 extern int flag_no_builtin;
 549
 550 /* Nonzero means don't recognize the non-ANSI builtin functions.
 551    -ansi sets this.  */
 552
 553 extern int flag_no_nonansi_builtin;
 554
 555 /* Nonzero means give `double' the same size as `float'.  */
 556
 557 extern int flag_short_double;
 558
 559 /* Nonzero means give `wchar_t' the same size as `short'.  */
 560
 561 extern int flag_short_wchar;
 562
 563 /* Nonzero means allow implicit conversions between vectors with
 564    differing numbers of subparts and/or differing element types.  */
 565 extern int flag_lax_vector_conversions;
 566
 567 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 568 extern int flag_ms_extensions;
 569
 570 /* Nonzero means don't recognize the keyword `asm'.  */
 571
 572 extern int flag_no_asm;
 573
 574 /* Nonzero means give string constants the type `const char *', as mandated
 575    by the standard.  */
 576
 577 extern int flag_const_strings;
 578
 579 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 580
 581 extern int flag_signed_bitfields;
 582
 583 /* Warn about #pragma directives that are not recognized.  */
 584
 585 extern int warn_unknown_pragmas; /* Tri state variable.  */
 586
 587 /* Warn about format/argument anomalies in calls to formatted I/O functions
 588    (*printf, *scanf, strftime, strfmon, etc.).  */
 589
 590 extern int warn_format;
 591
 592
 593 /* C/ObjC language option variables.  */
 594
 595
 596 /* Nonzero means allow type mismatches in conditional expressions;
 597    just make their values `void'.  */
 598
 599 extern int flag_cond_mismatch;
 600
 601 /* Nonzero means enable C89 Amendment 1 features.  */
 602
 603 extern int flag_isoc94;
 604
 605 /* Nonzero means use the ISO C99 (or C1X) dialect of C.  */
 606
 607 extern int flag_isoc99;
 608
 609 /* Nonzero means use the ISO C1X dialect of C.  */
 610
 611 extern int flag_isoc1x;
 612
 613 /* Nonzero means that we have builtin functions, and main is an int.  */
 614
 615 extern int flag_hosted;
 616
 617 /* ObjC language option variables.  */
 618
 619
 620 /* Open and close the file for outputting class declarations, if
 621    requested (ObjC).  */
 622
 623 extern int flag_gen_declaration;
 624
 625 /* Tells the compiler that this is a special run.  Do not perform any
 626    compiling, instead we are to test some platform dependent features
 627    and output a C header file with appropriate definitions.  */
 628
 629 extern int print_struct_values;
 630
 631 /* ???.  Undocumented.  */
 632
 633 extern const char *constant_string_class_name;
 634
 635
 636 /* C++ language option variables.  */
 637
 638
 639 /* Nonzero means don't recognize any extension keywords.  */
 640
 641 extern int flag_no_gnu_keywords;
 642
 643 /* Nonzero means do emit exported implementations of functions even if
 644    they can be inlined.  */
 645
 646 extern int flag_implement_inlines;
 647
 648 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 649
 650 extern int flag_implicit_templates;
 651
 652 /* Nonzero means that implicit instantiations of inline templates will be
 653    emitted if needed, even if instantiations of non-inline templates
 654    aren't.  */
 655
 656 extern int flag_implicit_inline_templates;
 657
 658 /* Nonzero means generate separate instantiation control files and
 659    juggle them at link time.  */
 660
 661 extern int flag_use_repository;
 662
 663 /* Nonzero if we want to issue diagnostics that the standard says are not
 664    required.  */
 665
 666 extern int flag_optional_diags;
 667
 668 /* Nonzero means we should attempt to elide constructors when possible.  */
 669
 670 extern int flag_elide_constructors;
 671
 672 /* Nonzero means that member functions defined in class scope are
 673    inline by default.  */
 674
 675 extern int flag_default_inline;
 676
 677 /* Controls whether compiler generates 'type descriptor' that give
 678    run-time type information.  */
 679
 680 extern int flag_rtti;
 681
 682 /* Nonzero if we want to conserve space in the .o files.  We do this
 683    by putting uninitialized data and runtime initialized data into
 684    .common instead of .data at the expense of not flagging multiple
 685    definitions.  */
 686
 687 extern int flag_conserve_space;
 688
 689 /* Nonzero if we want to obey access control semantics.  */
 690
 691 extern int flag_access_control;
 692
 693 /* Nonzero if we want to check the return value of new and avoid calling
 694    constructors if it is a null pointer.  */
 695
 696 extern int flag_check_new;
 697
 698 /* The supported C++ dialects.  */
 699
 700 enum cxx_dialect {
 701   /* C++98  */
 702   cxx98,
 703   /* Experimental features that are likely to become part of
 704      C++0x.  */
 705   cxx0x
 706 };
 707
 708 /* The C++ dialect being used. C++98 is the default.  */
 709 extern enum cxx_dialect cxx_dialect;
 710
 711 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 712    initialization variables.
 713    0: Old rules, set by -fno-for-scope.
 714    2: New ISO rules, set by -ffor-scope.
 715    1: Try to implement new ISO rules, but with backup compatibility
 716    (and warnings).  This is the default, for now.  */
 717
 718 extern int flag_new_for_scope;
 719
 720 /* Nonzero if we want to emit defined symbols with common-like linkage as
 721    weak symbols where possible, in order to conform to C++ semantics.
 722    Otherwise, emit them as local symbols.  */
 723
 724 extern int flag_weak;
 725
 726 /* 0 means we want the preprocessor to not emit line directives for
 727    the current working directory.  1 means we want it to do it.  -1
 728    means we should decide depending on whether debugging information
 729    is being emitted or not.  */
 730
 731 extern int flag_working_directory;
 732
 733 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 734    destructors for local statics and global objects.  */
 735
 736 extern int flag_use_cxa_atexit;
 737
 738 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
 739    logic.  */
 740
 741 extern int flag_use_cxa_get_exception_ptr;
 742
 743 /* Nonzero means to implement standard semantics for exception
 744    specifications, calling unexpected if an exception is thrown that
 745    doesn't match the specification.  Zero means to treat them as
 746    assertions and optimize accordingly, but not check them.  */
 747
 748 extern int flag_enforce_eh_specs;
 749
 750 /* Nonzero (the default) means to generate thread-safe code for
 751    initializing local statics.  */
 752
 753 extern int flag_threadsafe_statics;
 754
 755 /* Nonzero if we want to pretty-print template specializations as the
 756    template signature followed by the arguments.  */
 757
 758 extern int flag_pretty_templates;
 759
 760 /* Warn about using __null (as NULL in C++) as sentinel.  For code compiled
 761    with GCC this doesn't matter as __null is guaranteed to have the right
 762    size.  */
 763
 764 extern int warn_strict_null_sentinel;
 765
 766 /* Maximum template instantiation depth.  This limit is rather
 767    arbitrary, but it exists to limit the time it takes to notice
 768    infinite template instantiations.  */
 769
 770 extern int max_tinst_depth;
 771
 772 /* Nonzero means that we should not issue warnings about problems that
 773    occur when the code is executed, because the code being processed
 774    is not expected to be executed.  This is set during parsing.  This
 775    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 776    not a bool, because unexecuted expressions can nest.  */
 777
 778 extern int c_inhibit_evaluation_warnings;
 779
 780 /* Whether lexing has been completed, so subsequent preprocessor
 781    errors should use the compiler's input_location.  */
 782
 783 extern bool done_lexing;
 784
 785 /* C types are partitioned into three subsets: object, function, and
 786    incomplete types.  */
 787 #define C_TYPE_OBJECT_P(type) \
 788   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 789
 790 #define C_TYPE_INCOMPLETE_P(type) \
 791   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 792
 793 #define C_TYPE_FUNCTION_P(type) \
 794   (TREE_CODE (type) == FUNCTION_TYPE)
 795
 796 /* For convenience we define a single macro to identify the class of
 797    object or incomplete types.  */
 798 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 799   (!C_TYPE_FUNCTION_P (type))
 800
 801 /* Attribute table common to the C front ends.  */
 802 extern const struct attribute_spec c_common_attribute_table[];
 803 extern const struct attribute_spec c_common_format_attribute_table[];
 804
 805 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 806    ID is the identifier to use, NAME is the string.
 807    TYPE_DEP indicates whether it depends on type of the function or not
 808    (i.e. __PRETTY_FUNCTION__).  */
 809
 810 extern tree (*make_fname_decl) (location_t, tree, int);
 811
 812 /* In c-decl.c and cp/tree.c.  FIXME.  */
 813 extern void c_register_addr_space (const char *str, addr_space_t as);
 814
 815 /* In c-common.c.  */
 816 extern const char *c_addr_space_name (addr_space_t as);
 817 extern tree identifier_global_value (tree);
 818 extern void record_builtin_type (enum rid, const char *, tree);
 819 extern tree build_void_list_node (void);
 820 extern void start_fname_decls (void);
 821 extern void finish_fname_decls (void);
 822 extern const char *fname_as_string (int);
 823 extern tree fname_decl (location_t, unsigned, tree);
 824
 825 extern void check_function_arguments (tree, int, tree *, tree);
 826 extern void check_function_arguments_recurse (void (*)
 827                                               (void *, tree,
 828                                                unsigned HOST_WIDE_INT),
 829                                               void *, tree,
 830                                               unsigned HOST_WIDE_INT);
 831 extern bool check_builtin_function_arguments (tree, int, tree *);
 832 extern void check_function_format (tree, int, tree *);
 833 extern void set_Wformat (int);
 834 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 835 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 836 extern bool attribute_takes_identifier_p (const_tree);
 837 extern int c_common_handle_option (size_t code, const char *arg, int value, int kind);
 838 extern bool c_common_missing_argument (const char *opt, size_t code);
 839 extern tree c_common_type_for_mode (enum machine_mode, int);
 840 extern tree c_common_type_for_size (unsigned int, int);
 841 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 842                                                 int, int);
 843 extern tree c_common_unsigned_type (tree);
 844 extern tree c_common_signed_type (tree);
 845 extern tree c_common_signed_or_unsigned_type (int, tree);
 846 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 847 extern bool decl_with_nonnull_addr_p (const_tree);
 848 extern tree c_fully_fold (tree, bool, bool *);
 849 extern tree decl_constant_value_for_optimization (tree);
 850 extern tree c_wrap_maybe_const (tree, bool);
 851 extern tree c_save_expr (tree);
 852 extern tree c_common_truthvalue_conversion (location_t, tree);
 853 extern void c_apply_type_quals_to_decl (int, tree);
 854 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
 855 extern tree c_alignof_expr (location_t, tree);
 856 /* Print an error message for invalid operands to arith operation CODE.
 857    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 858 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 859 extern tree fix_string_type (tree);
 860 extern void constant_expression_warning (tree);
 861 extern void constant_expression_error (tree);
 862 extern bool strict_aliasing_warning (tree, tree, tree);
 863 extern void warnings_for_convert_and_check (tree, tree, tree);
 864 extern tree convert_and_check (tree, tree);
 865 extern void overflow_warning (location_t, tree);
 866 extern void warn_logical_operator (location_t, enum tree_code, tree,
 867                                    enum tree_code, tree, enum tree_code, tree);
 868 extern void check_main_parameter_types (tree decl);
 869 extern bool c_determine_visibility (tree);
 870 extern bool same_scalar_type_ignoring_signedness (tree, tree);
 871 extern void mark_valid_location_for_stdc_pragma (bool);
 872 extern bool valid_location_for_stdc_pragma_p (void);
 873 extern void set_float_const_decimal64 (void);
 874 extern void clear_float_const_decimal64 (void);
 875 extern bool float_const_decimal64_p (void);
 876
 877 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, 1)
 878 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
 879
 880 /* Subroutine of build_binary_op, used for certain operations.  */
 881 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 882
 883 /* Subroutine of build_binary_op, used for comparison operations.
 884    See if the operands have both been converted from subword integer types
 885    and, if so, perhaps change them both back to their original type.  */
 886 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 887
 888 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
 889
 890 /* Add qualifiers to a type, in the fashion for C.  */
 891 extern tree c_build_qualified_type (tree, int);
 892
 893 /* Build tree nodes and builtin functions common to both C and C++ language
 894    frontends.  */
 895 extern void c_common_nodes_and_builtins (void);
 896
 897 extern void disable_builtin_function (const char *);
 898
 899 extern void set_compound_literal_name (tree decl);
 900
 901 extern tree build_va_arg (location_t, tree, tree);
 902
 903 extern unsigned int c_common_init_options (unsigned int, const char **);
 904 extern bool c_common_post_options (const char **);
 905 extern bool c_common_init (void);
 906 extern void c_common_finish (void);
 907 extern void c_common_parse_file (int);
 908 extern alias_set_type c_common_get_alias_set (tree);
 909 extern void c_register_builtin_type (tree, const char*);
 910 extern bool c_promoting_integer_type_p (const_tree);
 911 extern int self_promoting_args_p (const_tree);
 912 extern tree strip_pointer_operator (tree);
 913 extern tree strip_pointer_or_array_types (tree);
 914 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 915
 916 /* This is the basic parsing function.  */
 917 extern void c_parse_file (void);
 918 /* This is misnamed, it actually performs end-of-compilation processing.  */
 919 extern void finish_file (void);
 920
 921
 922 /* These macros provide convenient access to the various _STMT nodes.  */
 923
 924 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 925    if a statement expression.  */
 926 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 927   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 928
 929 /* Nonzero if a label has been added to the statement list.  */
 930 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 931   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 932
 933 /* C_MAYBE_CONST_EXPR accessors.  */
 934 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 935   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 936 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 937   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 938 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 939   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 940 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 941   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 942 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 943   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 944    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 945        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 946            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 947
 948 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 949 #define DECL_C_BIT_FIELD(NODE) \
 950   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 951 #define SET_DECL_C_BIT_FIELD(NODE) \
 952   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 953 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 954   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 955
 956 extern tree do_case (location_t, tree, tree);
 957 extern tree build_stmt (location_t, enum tree_code, ...);
 958 extern tree build_case_label (location_t, tree, tree, tree);
 959
 960 /* These functions must be defined by each front-end which implements
 961    a variant of the C language.  They are used in c-common.c.  */
 962
 963 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 964 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 965 extern tree perform_integral_promotions (tree);
 966
 967 /* These functions must be defined by each front-end which implements
 968    a variant of the C language.  They are used by port files.  */
 969
 970 extern tree default_conversion (tree);
 971
 972 /* Given two integer or real types, return the type for their sum.
 973    Given two compatible ANSI C types, returns the merged type.  */
 974
 975 extern tree common_type (tree, tree);
 976
 977 extern tree decl_constant_value (tree);
 978
 979 /* Handle increment and decrement of boolean types.  */
 980 extern tree boolean_increment (enum tree_code, tree);
 981
 982 extern int case_compare (splay_tree_key, splay_tree_key);
 983
 984 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 985
 986 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 987
 988 extern tree build_function_call (location_t, tree, tree);
 989
 990 extern tree build_function_call_vec (location_t, tree,
 991                                      VEC(tree,gc) *, VEC(tree,gc) *);
 992
 993 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
 994
 995 extern tree finish_label_address_expr (tree, location_t);
 996
 997 /* Same function prototype, but the C and C++ front ends have
 998    different implementations.  Used in c-common.c.  */
 999 extern tree lookup_label (tree);
1000 extern tree lookup_name (tree);
1001 extern bool lvalue_p (const_tree);
1002
1003 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
1004 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
1005
1006 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1007
1008 extern void init_c_lex (void);
1009
1010 extern void c_cpp_builtins (cpp_reader *);
1011 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
1012 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
1013                          const char *, va_list *)
1014      ATTRIBUTE_GCC_DIAG(6,0);
1015
1016 /* Positive if an implicit `extern "C"' scope has just been entered;
1017    negative if such a scope has just been exited.  */
1018 extern GTY(()) int pending_lang_change;
1019
1020 /* Information recorded about each file examined during compilation.  */
1021
1022 struct c_fileinfo
1023 {
1024   int time;     /* Time spent in the file.  */
1025
1026   /* Flags used only by C++.
1027      INTERFACE_ONLY nonzero means that we are in an "interface" section
1028      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
1029      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
1030      INTERFACE_ONLY is zero, it means that we are responsible for
1031      exporting definitions that others might need.  */
1032   short interface_only;
1033   short interface_unknown;
1034 };
1035
1036 struct c_fileinfo *get_fileinfo (const char *);
1037 extern void dump_time_statistics (void);
1038
1039 extern bool c_dump_tree (void *, tree);
1040
1041 extern void verify_sequence_points (tree);
1042
1043 extern tree fold_offsetof (tree, tree);
1044
1045 /* Places where an lvalue, or modifiable lvalue, may be required.
1046    Used to select diagnostic messages in lvalue_error and
1047    readonly_error.  */
1048 enum lvalue_use {
1049   lv_assign,
1050   lv_increment,
1051   lv_decrement,
1052   lv_addressof,
1053   lv_asm
1054 };
1055
1056 extern void lvalue_error (enum lvalue_use);
1057
1058 extern int complete_array_type (tree *, tree, bool);
1059
1060 extern tree builtin_type_for_size (int, bool);
1061
1062 extern void warn_array_subscript_with_type_char (tree);
1063 extern void warn_about_parentheses (enum tree_code,
1064                                     enum tree_code, tree,
1065                                     enum tree_code, tree);
1066 extern void warn_for_unused_label (tree label);
1067 extern void warn_for_div_by_zero (location_t, tree divisor);
1068 extern void warn_for_sign_compare (location_t,
1069                                    tree orig_op0, tree orig_op1,
1070                                    tree op0, tree op1,
1071                                    tree result_type,
1072                                    enum tree_code resultcode);
1073 extern void set_underlying_type (tree x);
1074 extern bool is_typedef_decl (tree x);
1075 extern VEC(tree,gc) *make_tree_vector (void);
1076 extern void release_tree_vector (VEC(tree,gc) *);
1077 extern VEC(tree,gc) *make_tree_vector_single (tree);
1078 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
1079
1080 /* In c-gimplify.c  */
1081 extern void c_genericize (tree);
1082 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1083 extern tree c_build_bind_expr (location_t, tree, tree);
1084
1085 /* In c-pch.c  */
1086 extern void pch_init (void);
1087 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1088 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1089                                const char *orig);
1090 extern void c_common_write_pch (void);
1091 extern void c_common_no_more_pch (void);
1092 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1093 extern void c_common_print_pch_checksum (FILE *f);
1094
1095 /* In *-checksum.c */
1096 extern const unsigned char executable_checksum[16];
1097
1098 /* In c-cppbuiltin.c  */
1099 extern void builtin_define_std (const char *macro);
1100 extern void builtin_define_with_value (const char *, const char *, int);
1101 extern void c_stddef_cpp_builtins (void);
1102 extern void fe_file_change (const struct line_map *);
1103 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1104
1105 /* Objective-C / Objective-C++ entry points.  */
1106
1107 /* The following ObjC/ObjC++ functions are called by the C and/or C++
1108    front-ends; they all must have corresponding stubs in stub-objc.c.  */
1109 extern tree objc_is_class_name (tree);
1110 extern tree objc_is_object_ptr (tree);
1111 extern void objc_check_decl (tree);
1112 extern int objc_is_reserved_word (tree);
1113 extern bool objc_compare_types (tree, tree, int, tree);
1114 extern void objc_volatilize_decl (tree);
1115 extern bool objc_type_quals_match (tree, tree);
1116 extern tree objc_rewrite_function_call (tree, tree);
1117 extern tree objc_message_selector (void);
1118 extern tree objc_lookup_ivar (tree, tree);
1119 extern void objc_clear_super_receiver (void);
1120 extern int objc_is_public (tree, tree);
1121 extern tree objc_is_id (tree);
1122 extern void objc_declare_alias (tree, tree);
1123 extern void objc_declare_class (tree);
1124 extern void objc_declare_protocols (tree);
1125 extern tree objc_build_message_expr (tree);
1126 extern tree objc_finish_message_expr (tree, tree, tree);
1127 extern tree objc_build_selector_expr (location_t, tree);
1128 extern tree objc_build_protocol_expr (tree);
1129 extern tree objc_build_encode_expr (tree);
1130 extern tree objc_build_string_object (tree);
1131 extern tree objc_get_protocol_qualified_type (tree, tree);
1132 extern tree objc_get_class_reference (tree);
1133 extern tree objc_get_class_ivars (tree);
1134 extern void objc_start_class_interface (tree, tree, tree);
1135 extern void objc_start_category_interface (tree, tree, tree);
1136 extern void objc_start_protocol (tree, tree);
1137 extern void objc_continue_interface (void);
1138 extern void objc_finish_interface (void);
1139 extern void objc_start_class_implementation (tree, tree);
1140 extern void objc_start_category_implementation (tree, tree);
1141 extern void objc_continue_implementation (void);
1142 extern void objc_finish_implementation (void);
1143 extern void objc_set_visibility (int);
1144 extern void objc_set_method_type (enum tree_code);
1145 extern tree objc_build_method_signature (tree, tree, tree, bool);
1146 extern void objc_add_method_declaration (tree);
1147 extern void objc_start_method_definition (tree);
1148 extern void objc_finish_method_definition (tree);
1149 extern void objc_add_instance_variable (tree);
1150 extern tree objc_build_keyword_decl (tree, tree, tree);
1151 extern tree objc_build_throw_stmt (location_t, tree);
1152 extern void objc_begin_try_stmt (location_t, tree);
1153 extern tree objc_finish_try_stmt (void);
1154 extern void objc_begin_catch_clause (tree);
1155 extern void objc_finish_catch_clause (void);
1156 extern void objc_build_finally_clause (location_t, tree);
1157 extern tree objc_build_synchronized (location_t, tree, tree);
1158 extern int objc_static_init_needed_p (void);
1159 extern tree objc_generate_static_init_call (tree);
1160 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1161
1162 /* The following are provided by the C and C++ front-ends, and called by
1163    ObjC/ObjC++.  */
1164 extern void *objc_get_current_scope (void);
1165 extern void objc_mark_locals_volatile (void *);
1166
1167 /* In c-ppoutput.c  */
1168 extern void init_pp_output (FILE *);
1169 extern void preprocess_file (cpp_reader *);
1170 extern void pp_file_change (const struct line_map *);
1171 extern void pp_dir_change (cpp_reader *, const char *);
1172 extern bool check_missing_format_attribute (tree, tree);
1173
1174 /* In c-omp.c  */
1175 extern tree c_finish_omp_master (location_t, tree);
1176 extern tree c_finish_omp_critical (location_t, tree, tree);
1177 extern tree c_finish_omp_ordered (location_t, tree);
1178 extern void c_finish_omp_barrier (location_t);
1179 extern tree c_finish_omp_atomic (location_t, enum tree_code, tree, tree);
1180 extern void c_finish_omp_flush (location_t);
1181 extern void c_finish_omp_taskwait (location_t);
1182 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1183 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1184 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1185
1186 /* Not in c-omp.c; provided by the front end.  */
1187 extern bool c_omp_sharing_predetermined (tree);
1188 extern tree c_omp_remap_decl (tree, bool);
1189 extern void record_types_used_by_current_var_decl (tree);
1190
1191 #endif /* ! GCC_C_COMMON_H */