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