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