gcc/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
   3    1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 #ifndef GCC_C_COMMON_H
  23 #define GCC_C_COMMON_H
  24
  25 #include "splay-tree.h"
  26 #include "cpplib.h"
  27
  28 /* Usage of TREE_LANG_FLAG_?:
  29    0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
  30       TREE_NEGATED_INT (in INTEGER_CST).
  31       IDENTIFIER_MARKED (used by search routines).
  32       SCOPE_BEGIN_P (in SCOPE_STMT)
  33       DECL_PRETTY_FUNCTION_P (in VAR_DECL)
  34       NEW_FOR_SCOPE_P (in FOR_STMT)
  35       ASM_INPUT_P (in ASM_STMT)
  36       STMT_EXPR_NO_SCOPE (in STMT_EXPR)
  37    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  38       STMT_IS_FULL_EXPR_P (in _STMT)
  39    2: STMT_LINENO_FOR_FN_P (in _STMT)
  40    3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
  41       COMPOUND_STMT_BODY_BLOCK (in COMPOUND_STMT)
  42    4: SCOPE_PARTIAL_P (in SCOPE_STMT)
  43 */
  44
  45 /* Reserved identifiers.  This is the union of all the keywords for C,
  46    C++, and Objective-C.  All the type modifiers have to be in one
  47    block at the beginning, because they are used as mask bits.  There
  48    are 27 type modifiers; if we add many more we will have to redesign
  49    the mask mechanism.  */
  50
  51 enum rid
  52 {
  53   /* Modifiers: */
  54   /* C, in empirical order of frequency.  */
  55   RID_STATIC = 0,
  56   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  57   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  58   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  59
  60   /* C extensions */
  61   RID_BOUNDED, RID_UNBOUNDED, RID_COMPLEX, RID_THREAD,
  62
  63   /* C++ */
  64   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  65
  66   /* ObjC */
  67   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  68
  69   /* C */
  70   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  71   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  72   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  73   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  74   RID_SIZEOF,
  75
  76   /* C extensions */
  77   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
  78   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_PTRBASE,
  79   RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
  80
  81   /* Too many ways of getting the name of a function as a string */
  82   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
  83
  84   /* C++ */
  85   RID_BOOL,     RID_WCHAR,    RID_CLASS,
  86   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
  87   RID_TEMPLATE, RID_NULL,     RID_CATCH,
  88   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
  89   RID_NEW,      RID_OPERATOR, RID_THIS,
  90   RID_THROW,    RID_TRUE,     RID_TRY,
  91   RID_TYPENAME, RID_TYPEID,   RID_USING,
  92
  93   /* casts */
  94   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
  95
  96   /* Objective-C */
  97   RID_ID,          RID_AT_ENCODE,    RID_AT_END,
  98   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
  99   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
 100   RID_AT_PROTOCOL, RID_AT_SELECTOR,  RID_AT_INTERFACE,
 101   RID_AT_IMPLEMENTATION,
 102
 103   RID_MAX,
 104
 105   RID_FIRST_MODIFIER = RID_STATIC,
 106   RID_LAST_MODIFIER = RID_ONEWAY,
 107
 108   RID_FIRST_AT = RID_AT_ENCODE,
 109   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 110   RID_FIRST_PQ = RID_IN,
 111   RID_LAST_PQ = RID_ONEWAY
 112 };
 113
 114 #define OBJC_IS_AT_KEYWORD(rid) \
 115   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
 116    (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
 117
 118 #define OBJC_IS_PQ_KEYWORD(rid) \
 119   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
 120    (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
 121
 122 /* The elements of `ridpointers' are identifier nodes for the reserved
 123    type names and storage classes.  It is indexed by a RID_... value.  */
 124 extern tree *ridpointers;
 125
 126 /* Standard named or nameless data types of the C compiler.  */
 127
 128 enum c_tree_index
 129 {
 130     CTI_WCHAR_TYPE,
 131     CTI_SIGNED_WCHAR_TYPE,
 132     CTI_UNSIGNED_WCHAR_TYPE,
 133     CTI_WINT_TYPE,
 134     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 135     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 136     CTI_INTMAX_TYPE,
 137     CTI_UINTMAX_TYPE,
 138     CTI_WIDEST_INT_LIT_TYPE,
 139     CTI_WIDEST_UINT_LIT_TYPE,
 140
 141     CTI_CHAR_ARRAY_TYPE,
 142     CTI_WCHAR_ARRAY_TYPE,
 143     CTI_INT_ARRAY_TYPE,
 144     CTI_STRING_TYPE,
 145     CTI_CONST_STRING_TYPE,
 146
 147     /* Type for boolean expressions (bool in C++, int in C).  */
 148     CTI_BOOLEAN_TYPE,
 149     CTI_BOOLEAN_TRUE,
 150     CTI_BOOLEAN_FALSE,
 151     /* C99's _Bool type.  */
 152     CTI_C_BOOL_TYPE,
 153     CTI_C_BOOL_TRUE,
 154     CTI_C_BOOL_FALSE,
 155     CTI_DEFAULT_FUNCTION_TYPE,
 156
 157     CTI_G77_INTEGER_TYPE,
 158     CTI_G77_UINTEGER_TYPE,
 159     CTI_G77_LONGINT_TYPE,
 160     CTI_G77_ULONGINT_TYPE,
 161
 162     /* These are not types, but we have to look them up all the time.  */
 163     CTI_FUNCTION_NAME_DECL,
 164     CTI_PRETTY_FUNCTION_NAME_DECL,
 165     CTI_C99_FUNCTION_NAME_DECL,
 166     CTI_SAVED_FUNCTION_NAME_DECLS,
 167
 168     CTI_VOID_ZERO,
 169
 170     CTI_MAX
 171 };
 172
 173 #define C_RID_CODE(id)  (((struct c_common_identifier *) (id))->node.rid_code)
 174
 175 /* Identifier part common to the C front ends.  Inherits from
 176    tree_identifier, despite appearances.  */
 177 struct c_common_identifier GTY(())
 178 {
 179   struct tree_common common;
 180   struct cpp_hashnode GTY ((skip (""))) node;
 181 };
 182
 183 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 184 #define signed_wchar_type_node          c_global_trees[CTI_SIGNED_WCHAR_TYPE]
 185 #define unsigned_wchar_type_node        c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
 186 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 187 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 188 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 189 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 190 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 191 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 192 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 193
 194 #define boolean_type_node               c_global_trees[CTI_BOOLEAN_TYPE]
 195 #define boolean_true_node               c_global_trees[CTI_BOOLEAN_TRUE]
 196 #define boolean_false_node              c_global_trees[CTI_BOOLEAN_FALSE]
 197
 198 #define c_bool_type_node                c_global_trees[CTI_C_BOOL_TYPE]
 199 #define c_bool_true_node                c_global_trees[CTI_C_BOOL_TRUE]
 200 #define c_bool_false_node               c_global_trees[CTI_C_BOOL_FALSE]
 201
 202 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 203 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 204 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 205 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 206 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 207
 208 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 209
 210 /* g77 integer types, which which must be kept in sync with f/com.h */
 211 #define g77_integer_type_node           c_global_trees[CTI_G77_INTEGER_TYPE]
 212 #define g77_uinteger_type_node          c_global_trees[CTI_G77_UINTEGER_TYPE]
 213 #define g77_longint_type_node           c_global_trees[CTI_G77_LONGINT_TYPE]
 214 #define g77_ulongint_type_node          c_global_trees[CTI_G77_ULONGINT_TYPE]
 215
 216 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 217 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 218 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 219 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 220
 221 /* A node for `((void) 0)'.  */
 222 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 223
 224 extern GTY(()) tree c_global_trees[CTI_MAX];
 225
 226 /* Mark which labels are explicitly declared.
 227    These may be shadowed, and may be referenced from nested functions.  */
 228 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 229
 230 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
 231    warning if they undergo concatenation.  */
 232 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
 233
 234 typedef enum c_language_kind
 235 {
 236   clk_c = 0,      /* A dialect of C: K&R C, ANSI/ISO C89, C2000, etc.  */
 237   clk_cplusplus   /* ANSI/ISO C++ */
 238 }
 239 c_language_kind;
 240
 241 /* Information about a statement tree.  */
 242
 243 struct stmt_tree_s GTY(()) {
 244   /* The last statement added to the tree.  */
 245   tree x_last_stmt;
 246   /* The type of the last expression statement.  (This information is
 247      needed to implement the statement-expression extension.)  */
 248   tree x_last_expr_type;
 249   /* The last filename we recorded.  */
 250   const char *x_last_expr_filename;
 251   /* In C++, Nonzero if we should treat statements as full
 252      expressions.  In particular, this variable is no-zero if at the
 253      end of a statement we should destroy any temporaries created
 254      during that statement.  Similarly, if, at the end of a block, we
 255      should destroy any local variables in this block.  Normally, this
 256      variable is nonzero, since those are the normal semantics of
 257      C++.
 258
 259      However, in order to represent aggregate initialization code as
 260      tree structure, we use statement-expressions.  The statements
 261      within the statement expression should not result in cleanups
 262      being run until the entire enclosing statement is complete.
 263
 264      This flag has no effect in C.  */
 265   int stmts_are_full_exprs_p;
 266 };
 267
 268 typedef struct stmt_tree_s *stmt_tree;
 269
 270 /* Global state pertinent to the current function.  Some C dialects
 271    extend this structure with additional fields.  */
 272
 273 struct c_language_function GTY(()) {
 274   /* While we are parsing the function, this contains information
 275      about the statement-tree that we are building.  */
 276   struct stmt_tree_s x_stmt_tree;
 277   /* The stack of SCOPE_STMTs for the current function.  */
 278   tree x_scope_stmt_stack;
 279 };
 280
 281 /* When building a statement-tree, this is the last statement added to
 282    the tree.  */
 283
 284 #define last_tree (current_stmt_tree ()->x_last_stmt)
 285
 286 /* The type of the last expression-statement we have seen.  */
 287
 288 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
 289
 290 /* The name of the last file we have seen.  */
 291
 292 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
 293
 294 /* LAST_TREE contains the last statement parsed.  These are chained
 295    together through the TREE_CHAIN field, but often need to be
 296    re-organized since the parse is performed bottom-up.  This macro
 297    makes LAST_TREE the indicated SUBSTMT of STMT.  */
 298
 299 #define RECHAIN_STMTS(stmt, substmt)            \
 300   do {                                          \
 301     substmt = TREE_CHAIN (stmt);                \
 302     TREE_CHAIN (stmt) = NULL_TREE;              \
 303     last_tree = stmt;                           \
 304   } while (0)
 305
 306 /* Language-specific hooks.  */
 307
 308 extern int (*lang_statement_code_p)             PARAMS ((enum tree_code));
 309 extern void (*lang_expand_stmt)                 PARAMS ((tree));
 310 extern void (*lang_expand_decl_stmt)            PARAMS ((tree));
 311 extern void (*lang_expand_function_end)         PARAMS ((void));
 312 extern tree gettags                             PARAMS ((void));
 313
 314 /* Callback that determines if it's ok for a function to have no
 315    noreturn attribute.  */
 316 extern int (*lang_missing_noreturn_ok_p)        PARAMS ((tree));
 317
 318 extern int yyparse                              PARAMS ((void));
 319 extern void free_parser_stacks                  PARAMS ((void));
 320
 321 extern stmt_tree current_stmt_tree              PARAMS ((void));
 322 extern tree *current_scope_stmt_stack           PARAMS ((void));
 323 extern void begin_stmt_tree                     PARAMS ((tree *));
 324 extern tree add_stmt                            PARAMS ((tree));
 325 extern void add_decl_stmt                       PARAMS ((tree));
 326 extern tree add_scope_stmt                      PARAMS ((int, int));
 327 extern void finish_stmt_tree                    PARAMS ((tree *));
 328
 329 extern int statement_code_p                     PARAMS ((enum tree_code));
 330 extern tree walk_stmt_tree                      PARAMS ((tree *,
 331                                                          walk_tree_fn,
 332                                                          void *));
 333 extern void prep_stmt                           PARAMS ((tree));
 334 extern void expand_stmt                         PARAMS ((tree));
 335 extern void shadow_warning                      PARAMS ((const char *,
 336                                                          tree, tree));
 337 extern tree c_begin_if_stmt                     PARAMS ((void));
 338 extern tree c_begin_while_stmt                  PARAMS ((void));
 339 extern void c_finish_while_stmt_cond            PARAMS ((tree, tree));
 340
 341
 342 /* Extra information associated with a DECL.  Other C dialects extend
 343    this structure in various ways.  The C front-end only uses this
 344    structure for FUNCTION_DECLs; all other DECLs have a NULL
 345    DECL_LANG_SPECIFIC field.  */
 346
 347 struct c_lang_decl GTY(()) {
 348   unsigned declared_inline : 1;
 349 };
 350
 351 /* In a FUNCTION_DECL for which DECL_BUILT_IN does not hold, this is
 352      the approximate number of statements in this function.  There is
 353      no need for this number to be exact; it is only used in various
 354      heuristics regarding optimization.  */
 355 #define DECL_NUM_STMTS(NODE) \
 356   (FUNCTION_DECL_CHECK (NODE)->decl.u1.i)
 357
 358 /* The variant of the C language being processed.  Each C language
 359    front-end defines this variable.  */
 360
 361 extern c_language_kind c_language;
 362
 363 /* Switches common to the C front ends.  */
 364
 365 /* Nonzero if prepreprocessing only.  */
 366 extern int flag_preprocess_only;
 367
 368 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 369    user's namespace.  */
 370 extern int flag_iso;
 371
 372 /* Nonzero whenever Objective-C functionality is being used.  */
 373 extern int flag_objc;
 374
 375 /* Nonzero if -undef was given.  It suppresses target built-in macros
 376    and assertions.  */
 377 extern int flag_undef;
 378
 379 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 380
 381 extern int flag_no_builtin;
 382
 383 /* Nonzero means don't recognize the non-ANSI builtin functions.
 384    -ansi sets this.  */
 385
 386 extern int flag_no_nonansi_builtin;
 387
 388 /* Nonzero means give `double' the same size as `float'.  */
 389
 390 extern int flag_short_double;
 391
 392 /* Nonzero means give `wchar_t' the same size as `short'.  */
 393
 394 extern int flag_short_wchar;
 395
 396 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 397 extern int flag_ms_extensions;
 398
 399 /* Nonzero means don't recognize the keyword `asm'.  */
 400
 401 extern int flag_no_asm;
 402
 403 /* Nonzero means give string constants the type `const char *', as mandated
 404    by the standard.  */
 405
 406 extern int flag_const_strings;
 407
 408 /* Nonzero means `$' can be in an identifier.  */
 409
 410 extern int dollars_in_ident;
 411
 412 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 413
 414 extern int flag_signed_bitfields;
 415 extern int explicit_flag_signed_bitfields;
 416
 417 /* Nonzero means warn about pointer casts that can drop a type qualifier
 418    from the pointer target type.  */
 419
 420 extern int warn_cast_qual;
 421
 422 /* Warn about functions which might be candidates for format attributes.  */
 423
 424 extern int warn_missing_format_attribute;
 425
 426 /* Nonzero means warn about sizeof(function) or addition/subtraction
 427    of function pointers.  */
 428
 429 extern int warn_pointer_arith;
 430
 431 /* Nonzero means warn for any global function def
 432    without separate previous prototype decl.  */
 433
 434 extern int warn_missing_prototypes;
 435
 436 /* Warn if adding () is suggested.  */
 437
 438 extern int warn_parentheses;
 439
 440 /* Warn if initializer is not completely bracketed.  */
 441
 442 extern int warn_missing_braces;
 443
 444 /* Warn about comparison of signed and unsigned values.
 445    If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified.  */
 446
 447 extern int warn_sign_compare;
 448
 449 /* Nonzero means warn about usage of long long when `-pedantic'.  */
 450
 451 extern int warn_long_long;
 452
 453 /* Nonzero means warn about deprecated conversion from string constant to
 454    `char *'.  */
 455
 456 extern int warn_write_strings;
 457
 458 /* Nonzero means warn about multiple (redundant) decls for the same single
 459    variable or function.  */
 460
 461 extern int warn_redundant_decls;
 462
 463 /* Warn about testing equality of floating point numbers.  */
 464
 465 extern int warn_float_equal;
 466
 467 /* Warn about a subscript that has type char.  */
 468
 469 extern int warn_char_subscripts;
 470
 471 /* Warn if a type conversion is done that might have confusing results.  */
 472
 473 extern int warn_conversion;
 474
 475 /* Warn about #pragma directives that are not recognized.  */
 476
 477 extern int warn_unknown_pragmas; /* Tri state variable.  */
 478
 479 /* Warn about format/argument anomalies in calls to formatted I/O functions
 480    (*printf, *scanf, strftime, strfmon, etc.).  */
 481
 482 extern int warn_format;
 483
 484 /* Warn about Y2K problems with strftime formats.  */
 485
 486 extern int warn_format_y2k;
 487
 488 /* Warn about excess arguments to formats.  */
 489
 490 extern int warn_format_extra_args;
 491
 492 /* Warn about zero-length formats.  */
 493
 494 extern int warn_format_zero_length;
 495
 496 /* Warn about non-literal format arguments.  */
 497
 498 extern int warn_format_nonliteral;
 499
 500 /* Warn about possible security problems with calls to format functions.  */
 501
 502 extern int warn_format_security;
 503
 504
 505 /* C/ObjC language option variables.  */
 506
 507
 508 /* Nonzero means message about use of implicit function declarations;
 509  1 means warning; 2 means error.  */
 510
 511 extern int mesg_implicit_function_declaration;
 512
 513 /* Nonzero means allow type mismatches in conditional expressions;
 514    just make their values `void'.  */
 515
 516 extern int flag_cond_mismatch;
 517
 518 /* Nonzero means enable C89 Amendment 1 features.  */
 519
 520 extern int flag_isoc94;
 521
 522 /* Nonzero means use the ISO C99 dialect of C.  */
 523
 524 extern int flag_isoc99;
 525
 526 /* Nonzero means that we have builtin functions, and main is an int */
 527
 528 extern int flag_hosted;
 529
 530 /* Nonzero means add default format_arg attributes for functions not
 531    in ISO C.  */
 532
 533 extern int flag_noniso_default_format_attributes;
 534
 535 /* Nonzero means warn when casting a function call to a type that does
 536    not match the return type (e.g. (float)sqrt() or (anything*)malloc()
 537    when there is no previous declaration of sqrt or malloc.  */
 538
 539 extern int warn_bad_function_cast;
 540
 541 /* Warn about traditional constructs whose meanings changed in ANSI C.  */
 542
 543 extern int warn_traditional;
 544
 545 /* Nonzero means warn for non-prototype function decls
 546    or non-prototyped defs without previous prototype.  */
 547
 548 extern int warn_strict_prototypes;
 549
 550 /* Nonzero means warn for any global function def
 551    without separate previous decl.  */
 552
 553 extern int warn_missing_declarations;
 554
 555 /* Nonzero means warn about extern declarations of objects not at
 556    file-scope level and about *all* declarations of functions (whether
 557    extern or static) not at file-scope level.  Note that we exclude
 558    implicit function declarations.  To get warnings about those, use
 559    -Wimplicit.  */
 560
 561 extern int warn_nested_externs;
 562
 563 /* Warn if main is suspicious.  */
 564
 565 extern int warn_main;
 566
 567 /* Nonzero means warn about possible violations of sequence point rules.  */
 568
 569 extern int warn_sequence_point;
 570
 571 /* Nonzero means to warn about compile-time division by zero.  */
 572 extern int warn_div_by_zero;
 573
 574 /* Nonzero means warn about use of implicit int.  */
 575
 576 extern int warn_implicit_int;
 577
 578 /* Warn about NULL being passed to argument slots marked as requiring
 579    non-NULL.  */
 580
 581 extern int warn_nonnull;
 582
 583
 584 /* ObjC language option variables.  */
 585
 586
 587 /* Open and close the file for outputting class declarations, if
 588    requested (ObjC).  */
 589
 590 extern int flag_gen_declaration;
 591
 592 /* Generate code for GNU or NeXT runtime environment.  */
 593
 594 extern int flag_next_runtime;
 595
 596 /* Tells the compiler that this is a special run.  Do not perform any
 597    compiling, instead we are to test some platform dependent features
 598    and output a C header file with appropriate definitions.  */
 599
 600 extern int print_struct_values;
 601
 602 /* ???.  Undocumented.  */
 603
 604 extern const char *constant_string_class_name;
 605
 606 /* Warn if multiple methods are seen for the same selector, but with
 607    different argument types.  Performs the check on the whole selector
 608    table at the end of compilation.  */
 609
 610 extern int warn_selector;
 611
 612 /* Warn if a @selector() is found, and no method with that selector
 613    has been previously declared.  The check is done on each
 614    @selector() as soon as it is found - so it warns about forward
 615    declarations.  */
 616
 617 extern int warn_undeclared_selector;
 618
 619 /* Warn if methods required by a protocol are not implemented in the
 620    class adopting it.  When turned off, methods inherited to that
 621    class are also considered implemented.  */
 622
 623 extern int warn_protocol;
 624
 625
 626 /* C++ language option variables.  */
 627
 628
 629 /* Nonzero means don't recognize any extension keywords.  */
 630
 631 extern int flag_no_gnu_keywords;
 632
 633 /* Nonzero means do emit exported implementations of functions even if
 634    they can be inlined.  */
 635
 636 extern int flag_implement_inlines;
 637
 638 /* Nonzero means do emit exported implementations of templates, instead of
 639    multiple static copies in each file that needs a definition.  */
 640
 641 extern int flag_external_templates;
 642
 643 /* Nonzero means that the decision to emit or not emit the implementation of a
 644    template depends on where the template is instantiated, rather than where
 645    it is defined.  */
 646
 647 extern int flag_alt_external_templates;
 648
 649 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 650
 651 extern int flag_implicit_templates;
 652
 653 /* Nonzero means that implicit instantiations of inline templates will be
 654    emitted if needed, even if instantiations of non-inline templates
 655    aren't.  */
 656
 657 extern int flag_implicit_inline_templates;
 658
 659 /* Nonzero means generate separate instantiation control files and
 660    juggle them at link time.  */
 661
 662 extern int flag_use_repository;
 663
 664 /* Nonzero if we want to issue diagnostics that the standard says are not
 665    required.  */
 666
 667 extern int flag_optional_diags;
 668
 669 /* Nonzero means we should attempt to elide constructors when possible.  */
 670
 671 extern int flag_elide_constructors;
 672
 673 /* Nonzero means that member functions defined in class scope are
 674    inline by default.  */
 675
 676 extern int flag_default_inline;
 677
 678 /* Controls whether compiler generates 'type descriptor' that give
 679    run-time type information.  */
 680
 681 extern int flag_rtti;
 682
 683 /* Nonzero if we want to conserve space in the .o files.  We do this
 684    by putting uninitialized data and runtime initialized data into
 685    .common instead of .data at the expense of not flagging multiple
 686    definitions.  */
 687
 688 extern int flag_conserve_space;
 689
 690 /* Nonzero if we want to obey access control semantics.  */
 691
 692 extern int flag_access_control;
 693
 694 /* Nonzero if we want to check the return value of new and avoid calling
 695    constructors if it is a null pointer.  */
 696
 697 extern int flag_check_new;
 698
 699 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 700    initialization variables.
 701    0: Old rules, set by -fno-for-scope.
 702    2: New ISO rules, set by -ffor-scope.
 703    1: Try to implement new ISO rules, but with backup compatibility
 704    (and warnings).  This is the default, for now.  */
 705
 706 extern int flag_new_for_scope;
 707
 708 /* Nonzero if we want to emit defined symbols with common-like linkage as
 709    weak symbols where possible, in order to conform to C++ semantics.
 710    Otherwise, emit them as local symbols.  */
 711
 712 extern int flag_weak;
 713
 714 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 715    destructors for local statics and global objects.  */
 716
 717 extern int flag_use_cxa_atexit;
 718
 719 /* Nonzero means output .vtable_{entry,inherit} for use in doing vtable gc.  */
 720
 721 extern int flag_vtable_gc;
 722
 723 /* Nonzero means make the default pedwarns warnings instead of errors.
 724    The value of this flag is ignored if -pedantic is specified.  */
 725
 726 extern int flag_permissive;
 727
 728 /* Nonzero means to implement standard semantics for exception
 729    specifications, calling unexpected if an exception is thrown that
 730    doesn't match the specification.  Zero means to treat them as
 731    assertions and optimize accordingly, but not check them.  */
 732
 733 extern int flag_enforce_eh_specs;
 734
 735 /*  The version of the C++ ABI in use.  The following values are
 736     allowed:
 737
 738     0: The version of the ABI believed most conformant with the
 739        C++ ABI specification.  This ABI may change as bugs are
 740        discovered and fixed.  Therefore, 0 will not necessarily
 741        indicate the same ABI in different versions of G++.
 742
 743     1: The version of the ABI first used in G++ 3.2.
 744
 745     Additional positive integers will be assigned as new versions of
 746     the ABI become the default version of the ABI.  */
 747
 748 extern int flag_abi_version;
 749
 750 /* Nonzero means warn about things that will change when compiling
 751    with an ABI-compliant compiler.  */
 752
 753 extern int warn_abi;
 754
 755 /* Nonzero means warn about implicit declarations.  */
 756
 757 extern int warn_implicit;
 758
 759 /* Nonzero means warn when all ctors or dtors are private, and the class
 760    has no friends.  */
 761
 762 extern int warn_ctor_dtor_privacy;
 763
 764 /* Nonzero means warn in function declared in derived class has the
 765    same name as a virtual in the base class, but fails to match the
 766    type signature of any virtual function in the base class.  */
 767
 768 extern int warn_overloaded_virtual;
 769
 770 /* Nonzero means warn when declaring a class that has a non virtual
 771    destructor, when it really ought to have a virtual one.  */
 772
 773 extern int warn_nonvdtor;
 774
 775 /* Nonzero means warn when the compiler will reorder code.  */
 776
 777 extern int warn_reorder;
 778
 779 /* Nonzero means warn when synthesis behavior differs from Cfront's.  */
 780
 781 extern int warn_synth;
 782
 783 /* Nonzero means warn when we convert a pointer to member function
 784    into a pointer to (void or function).  */
 785
 786 extern int warn_pmf2ptr;
 787
 788 /* Nonzero means warn about violation of some Effective C++ style rules.  */
 789
 790 extern int warn_ecpp;
 791
 792 /* Nonzero means warn where overload resolution chooses a promotion from
 793    unsigned to signed over a conversion to an unsigned of the same size.  */
 794
 795 extern int warn_sign_promo;
 796
 797 /* Nonzero means warn when an old-style cast is used.  */
 798
 799 extern int warn_old_style_cast;
 800
 801 /* Nonzero means warn when non-templatized friend functions are
 802    declared within a template */
 803
 804 extern int warn_nontemplate_friend;
 805
 806 /* Nonzero means complain about deprecated features.  */
 807
 808 extern int warn_deprecated;
 809
 810 /* Maximum template instantiation depth.  This limit is rather
 811    arbitrary, but it exists to limit the time it takes to notice
 812    infinite template instantiations.  */
 813
 814 extern int max_tinst_depth;
 815
 816 /* Nonzero means the expression being parsed will never be evaluated.
 817    This is a count, since unevaluated expressions can nest.  */
 818
 819 extern int skip_evaluation;
 820
 821 /* C types are partitioned into three subsets: object, function, and
 822    incomplete types.  */
 823 #define C_TYPE_OBJECT_P(type) \
 824   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 825
 826 #define C_TYPE_INCOMPLETE_P(type) \
 827   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 828
 829 #define C_TYPE_FUNCTION_P(type) \
 830   (TREE_CODE (type) == FUNCTION_TYPE)
 831
 832 /* For convenience we define a single macro to identify the class of
 833    object or incomplete types.  */
 834 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 835   (!C_TYPE_FUNCTION_P (type))
 836
 837 /* Record in each node resulting from a binary operator
 838    what operator was specified for it.  */
 839 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
 840
 841 /* Attribute table common to the C front ends.  */
 842 extern const struct attribute_spec c_common_attribute_table[];
 843 extern const struct attribute_spec c_common_format_attribute_table[];
 844
 845 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 846    ID is the identifier to use, NAME is the string.
 847    TYPE_DEP indicates whether it depends on type of the function or not
 848    (i.e. __PRETTY_FUNCTION__).  */
 849
 850 extern tree (*make_fname_decl)                  PARAMS ((tree, int));
 851
 852 extern tree identifier_global_value             PARAMS ((tree));
 853 extern void record_builtin_type                 PARAMS ((enum rid,
 854                                                          const char *, tree));
 855 extern tree build_void_list_node                PARAMS ((void));
 856 extern void start_fname_decls                   PARAMS ((void));
 857 extern void finish_fname_decls                  PARAMS ((void));
 858 extern const char *fname_as_string              PARAMS ((int));
 859 extern tree fname_decl                          PARAMS ((unsigned, tree));
 860 extern const char *fname_string                 PARAMS ((unsigned));
 861
 862 extern void check_function_arguments            PARAMS ((tree, tree));
 863 extern void check_function_arguments_recurse    PARAMS ((void (*) (void *,
 864                                                                    tree,
 865                                                                    unsigned HOST_WIDE_INT),
 866                                                          void *, tree,
 867                                                          unsigned HOST_WIDE_INT));
 868 extern void check_function_format               PARAMS ((int *, tree, tree));
 869 extern void set_Wformat                         PARAMS ((int));
 870 extern tree handle_format_attribute             PARAMS ((tree *, tree, tree,
 871                                                          int, bool *));
 872 extern tree handle_format_arg_attribute         PARAMS ((tree *, tree, tree,
 873                                                          int, bool *));
 874 extern void c_common_insert_default_attributes  PARAMS ((tree));
 875 extern int c_common_decode_option               PARAMS ((int, char **));
 876 extern tree c_common_type_for_mode              PARAMS ((enum machine_mode,
 877                                                          int));
 878 extern tree c_common_type_for_size              PARAMS ((unsigned int, int));
 879 extern tree c_common_unsigned_type              PARAMS ((tree));
 880 extern tree c_common_signed_type                PARAMS ((tree));
 881 extern tree c_common_signed_or_unsigned_type    PARAMS ((int, tree));
 882 extern tree c_common_truthvalue_conversion      PARAMS ((tree));
 883 extern void c_apply_type_quals_to_decl          PARAMS ((int, tree));
 884 extern tree c_sizeof_or_alignof_type    PARAMS ((tree, enum tree_code, int));
 885 extern tree c_alignof_expr                      PARAMS ((tree));
 886 /* Print an error message for invalid operands to arith operation CODE.
 887    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 888 extern void binary_op_error                     PARAMS ((enum tree_code));
 889 #define my_friendly_assert(EXP, N) (void) \
 890  (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
 891
 892 extern tree c_expand_expr_stmt                  PARAMS ((tree));
 893 extern void c_expand_start_cond                 PARAMS ((tree, int, tree));
 894 extern void c_finish_then                       PARAMS ((void));
 895 extern void c_expand_start_else                 PARAMS ((void));
 896 extern void c_finish_else                       PARAMS ((void));
 897 extern void c_expand_end_cond                   PARAMS ((void));
 898 /* Validate the expression after `case' and apply default promotions.  */
 899 extern tree check_case_value                    PARAMS ((tree));
 900 extern tree fix_string_type                     PARAMS ((tree));
 901 struct varray_head_tag;
 902 extern tree combine_strings             PARAMS ((struct varray_head_tag *));
 903 extern void constant_expression_warning         PARAMS ((tree));
 904 extern tree convert_and_check                   PARAMS ((tree, tree));
 905 extern void overflow_warning                    PARAMS ((tree));
 906 extern void unsigned_conversion_warning         PARAMS ((tree, tree));
 907
 908 /* Read the rest of the current #-directive line.  */
 909 extern char *get_directive_line                 PARAMS ((void));
 910 #define GET_DIRECTIVE_LINE() get_directive_line ()
 911 #define c_sizeof(T)  c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
 912 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
 913
 914 /* Subroutine of build_binary_op, used for comparison operations.
 915    See if the operands have both been converted from subword integer types
 916    and, if so, perhaps change them both back to their original type.  */
 917 extern tree shorten_compare                     PARAMS ((tree *, tree *, tree *, enum tree_code *));
 918
 919 extern tree pointer_int_sum                     PARAMS ((enum tree_code, tree, tree));
 920 extern unsigned int min_precision               PARAMS ((tree, int));
 921
 922 /* Add qualifiers to a type, in the fashion for C.  */
 923 extern tree c_build_qualified_type              PARAMS ((tree, int));
 924
 925 /* Build tree nodes and builtin functions common to both C and C++ language
 926    frontends.  */
 927 extern void c_common_nodes_and_builtins         PARAMS ((void));
 928
 929 extern void disable_builtin_function            PARAMS ((const char *));
 930
 931 extern tree build_va_arg                        PARAMS ((tree, tree));
 932
 933 extern void c_common_init_options               PARAMS ((enum c_language_kind));
 934 extern bool c_common_post_options               PARAMS ((void));
 935 extern const char *c_common_init                PARAMS ((const char *));
 936 extern void c_common_finish                     PARAMS ((void));
 937 extern void c_common_parse_file                 PARAMS ((int));
 938 extern HOST_WIDE_INT c_common_get_alias_set     PARAMS ((tree));
 939 extern bool c_promoting_integer_type_p          PARAMS ((tree));
 940 extern int self_promoting_args_p                PARAMS ((tree));
 941 extern tree strip_array_types                   PARAMS ((tree));
 942
 943 /* These macros provide convenient access to the various _STMT nodes.  */
 944
 945 /* Nonzero if this statement should be considered a full-expression,
 946    i.e., if temporaries created during this statement should have
 947    their destructors run at the end of this statement.  (In C, this
 948    will always be false, since there are no destructors.)  */
 949 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
 950
 951 /* IF_STMT accessors. These give access to the condition of the if
 952    statement, the then block of the if statement, and the else block
 953    of the if statement if it exists.  */
 954 #define IF_COND(NODE)           TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
 955 #define THEN_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
 956 #define ELSE_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
 957
 958 /* WHILE_STMT accessors. These give access to the condition of the
 959    while statement and the body of the while statement, respectively.  */
 960 #define WHILE_COND(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
 961 #define WHILE_BODY(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
 962
 963 /* DO_STMT accessors. These give access to the condition of the do
 964    statement and the body of the do statement, respectively.  */
 965 #define DO_COND(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
 966 #define DO_BODY(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
 967
 968 /* RETURN_STMT accessors. These give the expression associated with a
 969    return statement, and whether it should be ignored when expanding
 970    (as opposed to inlining).  */
 971 #define RETURN_STMT_EXPR(NODE)  TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
 972
 973 /* EXPR_STMT accessor. This gives the expression associated with an
 974    expression statement.  */
 975 #define EXPR_STMT_EXPR(NODE)    TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
 976
 977 /* FOR_STMT accessors. These give access to the init statement,
 978    condition, update expression, and body of the for statement,
 979    respectively.  */
 980 #define FOR_INIT_STMT(NODE)     TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
 981 #define FOR_COND(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
 982 #define FOR_EXPR(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
 983 #define FOR_BODY(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
 984
 985 /* SWITCH_STMT accessors. These give access to the condition, body and
 986    original condition type (before any compiler conversions)
 987    of the switch statement, respectively.  */
 988 #define SWITCH_COND(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
 989 #define SWITCH_BODY(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
 990 #define SWITCH_TYPE(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
 991
 992 /* CASE_LABEL accessors. These give access to the high and low values
 993    of a case label, respectively.  */
 994 #define CASE_LOW(NODE)          TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
 995 #define CASE_HIGH(NODE)         TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
 996 #define CASE_LABEL_DECL(NODE)   TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
 997
 998 /* GOTO_STMT accessor. This gives access to the label associated with
 999    a goto statement.  */
1000 #define GOTO_DESTINATION(NODE)  TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1001 /* True for goto created artifically by the compiler.  */
1002 #define GOTO_FAKE_P(NODE)       (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1003
1004 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1005    statements associated with a compound statement. The result is the
1006    first statement in the list. Succeeding nodes can be accessed by
1007    calling TREE_CHAIN on a node in the list.  */
1008 #define COMPOUND_BODY(NODE)     TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1009
1010 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1011    instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1012    ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1013    statement.  */
1014 #define ASM_CV_QUAL(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1015 #define ASM_STRING(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1016 #define ASM_OUTPUTS(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1017 #define ASM_INPUTS(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1018 #define ASM_CLOBBERS(NODE)      TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1019
1020 /* DECL_STMT accessor. This gives access to the DECL associated with
1021    the given declaration statement.  */
1022 #define DECL_STMT_DECL(NODE)    TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1023
1024 /* STMT_EXPR accessor.  */
1025 #define STMT_EXPR_STMT(NODE)    TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1026
1027 /* Nonzero if this statement-expression does not have an associated scope.  */
1028 #define STMT_EXPR_NO_SCOPE(NODE) \
1029    TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1030
1031 /* LABEL_STMT accessor. This gives access to the label associated with
1032    the given label statement.  */
1033 #define LABEL_STMT_LABEL(NODE)  TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1034
1035 /* COMPOUND_LITERAL_EXPR accessors.  */
1036 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE)           \
1037   TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1038 #define COMPOUND_LITERAL_EXPR_DECL(NODE)                        \
1039   DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1040
1041 /* Nonzero if this SCOPE_STMT is for the beginning of a scope.  */
1042 #define SCOPE_BEGIN_P(NODE) \
1043   (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1044
1045 /* Nonzero if this SCOPE_STMT is for the end of a scope.  */
1046 #define SCOPE_END_P(NODE) \
1047   (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1048
1049 /* The BLOCK containing the declarations contained in this scope.  */
1050 #define SCOPE_STMT_BLOCK(NODE) \
1051   (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1052
1053 /* Nonzero for a SCOPE_STMT if there were no variables in this scope.  */
1054 #define SCOPE_NULLIFIED_P(NODE) \
1055   (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1056
1057 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1058    which should be treated as non-existent from the point of view of
1059    running cleanup actions.  */
1060 #define SCOPE_NO_CLEANUPS_P(NODE) \
1061   (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1062
1063 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1064    For example, in:
1065
1066      S s;
1067      l:
1068      S s2;
1069      goto l;
1070
1071    there is (implicitly) a new scope after `l', even though there are
1072    no curly braces.  In particular, when we hit the goto, we must
1073    destroy s2 and then re-construct it.  For the implicit scope,
1074    SCOPE_PARTIAL_P will be set.  */
1075 #define SCOPE_PARTIAL_P(NODE) \
1076   (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1077
1078 /* Nonzero for an ASM_STMT if the assembly statement is volatile.  */
1079 #define ASM_VOLATILE_P(NODE)                    \
1080   (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1081
1082 /* The VAR_DECL to clean up in a CLEANUP_STMT.  */
1083 #define CLEANUP_DECL(NODE) \
1084   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1085 /* The cleanup to run in a CLEANUP_STMT.  */
1086 #define CLEANUP_EXPR(NODE) \
1087   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1088
1089 /* The filename we are changing to as of this FILE_STMT.  */
1090 #define FILE_STMT_FILENAME_NODE(NODE) \
1091   (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1092 #define FILE_STMT_FILENAME(NODE) \
1093   (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1094
1095 /* The line-number at which a statement began.  But if
1096    STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1097    line number for the end of the current function instead.  */
1098 #define STMT_LINENO(NODE)                       \
1099   (TREE_COMPLEXITY ((NODE)))
1100
1101 /* If nonzero, the STMT_LINENO for NODE is the line at which the
1102    function ended.  */
1103 #define STMT_LINENO_FOR_FN_P(NODE)              \
1104   (TREE_LANG_FLAG_2 ((NODE)))
1105
1106 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1107    initialization variables.  */
1108 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1109
1110 /* Nonzero if we want to create an ASM_INPUT instead of an
1111    ASM_OPERAND with no operands.  */
1112 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1113
1114 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1115
1116 enum c_tree_code {
1117   C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1118 #include "c-common.def"
1119   LAST_C_TREE_CODE
1120 };
1121
1122 #undef DEFTREECODE
1123
1124 extern void genrtl_do_pushlevel                 PARAMS ((void));
1125 extern void genrtl_goto_stmt                    PARAMS ((tree));
1126 extern void genrtl_expr_stmt                    PARAMS ((tree));
1127 extern void genrtl_expr_stmt_value              PARAMS ((tree, int, int));
1128 extern void genrtl_decl_stmt                    PARAMS ((tree));
1129 extern void genrtl_if_stmt                      PARAMS ((tree));
1130 extern void genrtl_while_stmt                   PARAMS ((tree));
1131 extern void genrtl_do_stmt                      PARAMS ((tree));
1132 extern void genrtl_return_stmt                  PARAMS ((tree));
1133 extern void genrtl_for_stmt                     PARAMS ((tree));
1134 extern void genrtl_break_stmt                   PARAMS ((void));
1135 extern void genrtl_continue_stmt                PARAMS ((void));
1136 extern void genrtl_scope_stmt                   PARAMS ((tree));
1137 extern void genrtl_switch_stmt                  PARAMS ((tree));
1138 extern void genrtl_case_label                   PARAMS ((tree));
1139 extern void genrtl_compound_stmt                PARAMS ((tree));
1140 extern void genrtl_asm_stmt                     PARAMS ((tree, tree,
1141                                                          tree, tree,
1142                                                          tree, int));
1143 extern void genrtl_decl_cleanup                 PARAMS ((tree));
1144 extern int stmts_are_full_exprs_p               PARAMS ((void));
1145 extern int anon_aggr_type_p                     PARAMS ((tree));
1146
1147 /* For a VAR_DECL that is an anonymous union, these are the various
1148    sub-variables that make up the anonymous union.  */
1149 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1150
1151 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
1152 #define DECL_C_BIT_FIELD(NODE) \
1153   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1154 #define SET_DECL_C_BIT_FIELD(NODE) \
1155   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1156 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1157   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1158
1159 /* In a VAR_DECL, nonzero if the decl is a register variable with
1160    an explicit asm specification.  */
1161 #define DECL_C_HARD_REGISTER(DECL)  DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1162
1163 extern void emit_local_var                      PARAMS ((tree));
1164 extern void make_rtl_for_local_static           PARAMS ((tree));
1165 extern tree expand_cond                         PARAMS ((tree));
1166 extern tree c_expand_return                     PARAMS ((tree));
1167 extern tree do_case                             PARAMS ((tree, tree));
1168 extern tree build_stmt                          PARAMS ((enum tree_code, ...));
1169 extern tree build_case_label                    PARAMS ((tree, tree, tree));
1170 extern tree build_continue_stmt                 PARAMS ((void));
1171 extern tree build_break_stmt                    PARAMS ((void));
1172 extern tree build_return_stmt                   PARAMS ((tree));
1173
1174 #define COMPOUND_STMT_NO_SCOPE(NODE)    TREE_LANG_FLAG_0 (NODE)
1175
1176 /* Used by the C++ frontend to mark the block around the member
1177    initializers and cleanups.  */
1178 #define COMPOUND_STMT_BODY_BLOCK(NODE)  TREE_LANG_FLAG_3 (NODE)
1179
1180 extern void c_expand_asm_operands               PARAMS ((tree, tree, tree, tree, int, const char *, int));
1181
1182 /* These functions must be defined by each front-end which implements
1183    a variant of the C language.  They are used in c-common.c.  */
1184
1185 extern tree build_unary_op                      PARAMS ((enum tree_code,
1186                                                          tree, int));
1187 extern tree build_binary_op                     PARAMS ((enum tree_code,
1188                                                          tree, tree, int));
1189 extern int lvalue_p                             PARAMS ((tree));
1190 extern tree default_conversion                  PARAMS ((tree));
1191
1192 /* Given two integer or real types, return the type for their sum.
1193    Given two compatible ANSI C types, returns the merged type.  */
1194
1195 extern tree common_type                         PARAMS ((tree, tree));
1196
1197 extern tree expand_tree_builtin                 PARAMS ((tree, tree, tree));
1198
1199 extern tree decl_constant_value         PARAMS ((tree));
1200
1201 /* Handle increment and decrement of boolean types.  */
1202 extern tree boolean_increment                   PARAMS ((enum tree_code,
1203                                                          tree));
1204
1205 /* Hook currently used only by the C++ front end to reset internal state
1206    after entering or leaving a header file.  */
1207 extern void extract_interface_info              PARAMS ((void));
1208
1209 extern int case_compare                         PARAMS ((splay_tree_key,
1210                                                          splay_tree_key));
1211
1212 extern tree c_add_case_label                    PARAMS ((splay_tree,
1213                                                          tree, tree,
1214                                                          tree));
1215
1216 extern tree build_function_call                 PARAMS ((tree, tree));
1217
1218 extern tree finish_label_address_expr           PARAMS ((tree));
1219
1220 /* Same function prototype, but the C and C++ front ends have
1221    different implementations.  Used in c-common.c.  */
1222 extern tree lookup_label                        PARAMS ((tree));
1223
1224 extern rtx c_expand_expr                        PARAMS ((tree, rtx,
1225                                                          enum machine_mode,
1226                                                          int));
1227
1228 extern int c_safe_from_p                        PARAMS ((rtx, tree));
1229
1230 extern int c_staticp                            PARAMS ((tree));
1231
1232 extern int c_common_unsafe_for_reeval           PARAMS ((tree));
1233
1234 extern const char *init_c_lex                   PARAMS ((const char *));
1235
1236 extern void cb_register_builtins                PARAMS ((cpp_reader *));
1237
1238 /* Positive if an implicit `extern "C"' scope has just been entered;
1239    negative if such a scope has just been exited.  */
1240 extern int pending_lang_change;
1241
1242 /* Information recorded about each file examined during compilation.  */
1243
1244 struct c_fileinfo
1245 {
1246   int time;     /* Time spent in the file.  */
1247   short interface_only;         /* Flags - used only by C++ */
1248   short interface_unknown;
1249 };
1250
1251 struct c_fileinfo *get_fileinfo                 PARAMS ((const char *));
1252 extern void dump_time_statistics                PARAMS ((void));
1253
1254 extern int c_dump_tree                          PARAMS ((void *, tree));
1255
1256 #endif /* ! GCC_C_COMMON_H */