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 GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
 125
 126 /* Standard named or nameless data types of the C compiler.  */
 127
 128 enum c_tree_index
 129 {
 130     CTI_WCHAR_TYPE,
 131     CTI_SIGNED_WCHAR_TYPE,
 132     CTI_UNSIGNED_WCHAR_TYPE,
 133     CTI_WINT_TYPE,
 134     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 135     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 136     CTI_INTMAX_TYPE,
 137     CTI_UINTMAX_TYPE,
 138     CTI_WIDEST_INT_LIT_TYPE,
 139     CTI_WIDEST_UINT_LIT_TYPE,
 140
 141     CTI_CHAR_ARRAY_TYPE,
 142     CTI_WCHAR_ARRAY_TYPE,
 143     CTI_INT_ARRAY_TYPE,
 144     CTI_STRING_TYPE,
 145     CTI_CONST_STRING_TYPE,
 146
 147     /* Type for boolean expressions (bool in C++, int in C).  */
 148     CTI_BOOLEAN_TYPE,
 149     CTI_BOOLEAN_TRUE,
 150     CTI_BOOLEAN_FALSE,
 151     /* C99's _Bool type.  */
 152     CTI_C_BOOL_TYPE,
 153     CTI_C_BOOL_TRUE,
 154     CTI_C_BOOL_FALSE,
 155     CTI_DEFAULT_FUNCTION_TYPE,
 156
 157     CTI_G77_INTEGER_TYPE,
 158     CTI_G77_UINTEGER_TYPE,
 159     CTI_G77_LONGINT_TYPE,
 160     CTI_G77_ULONGINT_TYPE,
 161
 162     /* These are not types, but we have to look them up all the time.  */
 163     CTI_FUNCTION_NAME_DECL,
 164     CTI_PRETTY_FUNCTION_NAME_DECL,
 165     CTI_C99_FUNCTION_NAME_DECL,
 166     CTI_SAVED_FUNCTION_NAME_DECLS,
 167
 168     CTI_VOID_ZERO,
 169
 170     CTI_MAX
 171 };
 172
 173 #define C_RID_CODE(id)  (((struct c_common_identifier *) (id))->node.rid_code)
 174
 175 /* Identifier part common to the C front ends.  Inherits from
 176    tree_identifier, despite appearances.  */
 177 struct c_common_identifier GTY(())
 178 {
 179   struct tree_common common;
 180   struct cpp_hashnode node;
 181 };
 182
 183 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 184 #define signed_wchar_type_node          c_global_trees[CTI_SIGNED_WCHAR_TYPE]
 185 #define unsigned_wchar_type_node        c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
 186 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 187 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 188 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 189 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 190 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 191 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 192 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 193
 194 #define boolean_type_node               c_global_trees[CTI_BOOLEAN_TYPE]
 195 #define boolean_true_node               c_global_trees[CTI_BOOLEAN_TRUE]
 196 #define boolean_false_node              c_global_trees[CTI_BOOLEAN_FALSE]
 197
 198 #define c_bool_type_node                c_global_trees[CTI_C_BOOL_TYPE]
 199 #define c_bool_true_node                c_global_trees[CTI_C_BOOL_TRUE]
 200 #define c_bool_false_node               c_global_trees[CTI_C_BOOL_FALSE]
 201
 202 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 203 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 204 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 205 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 206 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 207
 208 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 209
 210 /* g77 integer types, which which must be kept in sync with f/com.h */
 211 #define g77_integer_type_node           c_global_trees[CTI_G77_INTEGER_TYPE]
 212 #define g77_uinteger_type_node          c_global_trees[CTI_G77_UINTEGER_TYPE]
 213 #define g77_longint_type_node           c_global_trees[CTI_G77_LONGINT_TYPE]
 214 #define g77_ulongint_type_node          c_global_trees[CTI_G77_ULONGINT_TYPE]
 215
 216 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 217 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 218 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 219 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 220
 221 /* A node for `((void) 0)'.  */
 222 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 223
 224 extern GTY(()) tree c_global_trees[CTI_MAX];
 225
 226 /* Mark which labels are explicitly declared.
 227    These may be shadowed, and may be referenced from nested functions.  */
 228 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 229
 230 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
 231    warning if they undergo concatenation.  */
 232 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
 233
 234 typedef enum c_language_kind
 235 {
 236   clk_c = 0,      /* A dialect of C: K&R C, ANSI/ISO C89, C2000, etc.  */
 237   clk_cplusplus   /* ANSI/ISO C++ */
 238 }
 239 c_language_kind;
 240
 241 /* Information about a statement tree.  */
 242
 243 struct stmt_tree_s GTY(()) {
 244   /* The last statement added to the tree.  */
 245   tree x_last_stmt;
 246   /* The type of the last expression statement.  (This information is
 247      needed to implement the statement-expression extension.)  */
 248   tree x_last_expr_type;
 249   /* The last filename we recorded.  */
 250   const char *x_last_expr_filename;
 251   /* In C++, Nonzero if we should treat statements as full
 252      expressions.  In particular, this variable is no-zero if at the
 253      end of a statement we should destroy any temporaries created
 254      during that statement.  Similarly, if, at the end of a block, we
 255      should destroy any local variables in this block.  Normally, this
 256      variable is nonzero, since those are the normal semantics of
 257      C++.
 258
 259      However, in order to represent aggregate initialization code as
 260      tree structure, we use statement-expressions.  The statements
 261      within the statement expression should not result in cleanups
 262      being run until the entire enclosing statement is complete.
 263
 264      This flag has no effect in C.  */
 265   int stmts_are_full_exprs_p;
 266 };
 267
 268 typedef struct stmt_tree_s *stmt_tree;
 269
 270 /* Global state pertinent to the current function.  Some C dialects
 271    extend this structure with additional fields.  */
 272
 273 struct c_language_function GTY(()) {
 274   /* While we are parsing the function, this contains information
 275      about the statement-tree that we are building.  */
 276   struct stmt_tree_s x_stmt_tree;
 277   /* The stack of SCOPE_STMTs for the current function.  */
 278   tree x_scope_stmt_stack;
 279 };
 280
 281 /* When building a statement-tree, this is the last statement added to
 282    the tree.  */
 283
 284 #define last_tree (current_stmt_tree ()->x_last_stmt)
 285
 286 /* The type of the last expression-statement we have seen.  */
 287
 288 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
 289
 290 /* The name of the last file we have seen.  */
 291
 292 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
 293
 294 /* LAST_TREE contains the last statement parsed.  These are chained
 295    together through the TREE_CHAIN field, but often need to be
 296    re-organized since the parse is performed bottom-up.  This macro
 297    makes LAST_TREE the indicated SUBSTMT of STMT.  */
 298
 299 #define RECHAIN_STMTS(stmt, substmt)            \
 300   do {                                          \
 301     substmt = TREE_CHAIN (stmt);                \
 302     TREE_CHAIN (stmt) = NULL_TREE;              \
 303     last_tree = stmt;                           \
 304   } while (0)
 305
 306 /* Language-specific hooks.  */
 307
 308 extern int (*lang_statement_code_p)             PARAMS ((enum tree_code));
 309 extern void (*lang_expand_stmt)                 PARAMS ((tree));
 310 extern void (*lang_expand_decl_stmt)            PARAMS ((tree));
 311 extern void (*lang_expand_function_end)         PARAMS ((void));
 312 extern tree gettags                             PARAMS ((void));
 313
 314 /* Callback that determines if it's ok for a function to have no
 315    noreturn attribute.  */
 316 extern int (*lang_missing_noreturn_ok_p)        PARAMS ((tree));
 317
 318 extern int yyparse                              PARAMS ((void));
 319 extern void free_parser_stacks                  PARAMS ((void));
 320
 321 extern stmt_tree current_stmt_tree              PARAMS ((void));
 322 extern tree *current_scope_stmt_stack           PARAMS ((void));
 323 extern void begin_stmt_tree                     PARAMS ((tree *));
 324 extern tree add_stmt                            PARAMS ((tree));
 325 extern void add_decl_stmt                       PARAMS ((tree));
 326 extern tree add_scope_stmt                      PARAMS ((int, int));
 327 extern void finish_stmt_tree                    PARAMS ((tree *));
 328
 329 extern int statement_code_p                     PARAMS ((enum tree_code));
 330 extern tree walk_stmt_tree                      PARAMS ((tree *,
 331                                                          walk_tree_fn,
 332                                                          void *));
 333 extern void prep_stmt                           PARAMS ((tree));
 334 extern void expand_stmt                         PARAMS ((tree));
 335 extern void shadow_warning                      PARAMS ((const char *,
 336                                                          tree, tree));
 337 extern tree c_begin_if_stmt                     PARAMS ((void));
 338 extern tree c_begin_while_stmt                  PARAMS ((void));
 339 extern void c_finish_while_stmt_cond            PARAMS ((tree, tree));
 340
 341
 342 /* Extra information associated with a DECL.  Other C dialects extend
 343    this structure in various ways.  The C front-end only uses this
 344    structure for FUNCTION_DECLs; all other DECLs have a NULL
 345    DECL_LANG_SPECIFIC field.  */
 346
 347 struct c_lang_decl GTY(()) {
 348   unsigned declared_inline : 1;
 349 };
 350
 351 /* In a FUNCTION_DECL for which DECL_BUILT_IN does not hold, this is
 352      the approximate number of statements in this function.  There is
 353      no need for this number to be exact; it is only used in various
 354      heuristics regarding optimization.  */
 355 #define DECL_NUM_STMTS(NODE) \
 356   (FUNCTION_DECL_CHECK (NODE)->decl.u1.i)
 357
 358 /* The variant of the C language being processed.  Each C language
 359    front-end defines this variable.  */
 360
 361 extern c_language_kind c_language;
 362
 363 /* Nonzero if we can read a PCH file now.  */
 364
 365 extern int allow_pch;
 366 \f
 367 /* Switches common to the C front ends.  */
 368
 369 /* Nonzero if prepreprocessing only.  */
 370
 371 extern int flag_preprocess_only;
 372
 373 /* Nonzero means don't output line number information.  */
 374
 375 extern char flag_no_line_commands;
 376
 377 /* Nonzero causes -E output not to be done, but directives such as
 378    #define that have side effects are still obeyed.  */
 379
 380 extern char flag_no_output;
 381
 382 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
 383    'N' of the command line switch.  */
 384
 385 extern char flag_dump_macros;
 386
 387 /* Nonzero means pass #include lines through to the output.  */
 388
 389 extern char flag_dump_includes;
 390
 391 /* The file name to which we should write a precompiled header, or
 392    NULL if no header will be written in this compile.  */
 393
 394 extern const char *pch_file;
 395
 396 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 397    user's namespace.  */
 398
 399 extern int flag_iso;
 400
 401 /* Nonzero whenever Objective-C functionality is being used.  */
 402 extern int flag_objc;
 403
 404 /* Nonzero if -undef was given.  It suppresses target built-in macros
 405    and assertions.  */
 406
 407 extern int flag_undef;
 408
 409 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 410
 411 extern int flag_no_builtin;
 412
 413 /* Nonzero means don't recognize the non-ANSI builtin functions.
 414    -ansi sets this.  */
 415
 416 extern int flag_no_nonansi_builtin;
 417
 418 /* Nonzero means give `double' the same size as `float'.  */
 419
 420 extern int flag_short_double;
 421
 422 /* Nonzero means give `wchar_t' the same size as `short'.  */
 423
 424 extern int flag_short_wchar;
 425
 426 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 427 extern int flag_ms_extensions;
 428
 429 /* Nonzero means don't recognize the keyword `asm'.  */
 430
 431 extern int flag_no_asm;
 432
 433 /* Nonzero means give string constants the type `const char *', as mandated
 434    by the standard.  */
 435
 436 extern int flag_const_strings;
 437
 438 /* Nonzero means `$' can be in an identifier.  */
 439
 440 extern int dollars_in_ident;
 441
 442 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 443
 444 extern int flag_signed_bitfields;
 445 extern int explicit_flag_signed_bitfields;
 446
 447 /* Nonzero means warn about pointer casts that can drop a type qualifier
 448    from the pointer target type.  */
 449
 450 extern int warn_cast_qual;
 451
 452 /* Warn about functions which might be candidates for format attributes.  */
 453
 454 extern int warn_missing_format_attribute;
 455
 456 /* Nonzero means warn about sizeof(function) or addition/subtraction
 457    of function pointers.  */
 458
 459 extern int warn_pointer_arith;
 460
 461 /* Nonzero means warn for any global function def
 462    without separate previous prototype decl.  */
 463
 464 extern int warn_missing_prototypes;
 465
 466 /* Warn if adding () is suggested.  */
 467
 468 extern int warn_parentheses;
 469
 470 /* Warn if initializer is not completely bracketed.  */
 471
 472 extern int warn_missing_braces;
 473
 474 /* Warn about comparison of signed and unsigned values.
 475    If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified.  */
 476
 477 extern int warn_sign_compare;
 478
 479 /* Nonzero means warn about usage of long long when `-pedantic'.  */
 480
 481 extern int warn_long_long;
 482
 483 /* Nonzero means warn about deprecated conversion from string constant to
 484    `char *'.  */
 485
 486 extern int warn_write_strings;
 487
 488 /* Nonzero means warn about multiple (redundant) decls for the same single
 489    variable or function.  */
 490
 491 extern int warn_redundant_decls;
 492
 493 /* Warn about testing equality of floating point numbers.  */
 494
 495 extern int warn_float_equal;
 496
 497 /* Warn about a subscript that has type char.  */
 498
 499 extern int warn_char_subscripts;
 500
 501 /* Warn if a type conversion is done that might have confusing results.  */
 502
 503 extern int warn_conversion;
 504
 505 /* Warn about #pragma directives that are not recognized.  */
 506
 507 extern int warn_unknown_pragmas; /* Tri state variable.  */
 508
 509 /* Warn about format/argument anomalies in calls to formatted I/O functions
 510    (*printf, *scanf, strftime, strfmon, etc.).  */
 511
 512 extern int warn_format;
 513
 514 /* Warn about Y2K problems with strftime formats.  */
 515
 516 extern int warn_format_y2k;
 517
 518 /* Warn about excess arguments to formats.  */
 519
 520 extern int warn_format_extra_args;
 521
 522 /* Warn about zero-length formats.  */
 523
 524 extern int warn_format_zero_length;
 525
 526 /* Warn about non-literal format arguments.  */
 527
 528 extern int warn_format_nonliteral;
 529
 530 /* Warn about possible security problems with calls to format functions.  */
 531
 532 extern int warn_format_security;
 533
 534
 535 /* C/ObjC language option variables.  */
 536
 537
 538 /* Nonzero means message about use of implicit function declarations;
 539  1 means warning; 2 means error.  */
 540
 541 extern int mesg_implicit_function_declaration;
 542
 543 /* Nonzero means allow type mismatches in conditional expressions;
 544    just make their values `void'.  */
 545
 546 extern int flag_cond_mismatch;
 547
 548 /* Nonzero means enable C89 Amendment 1 features.  */
 549
 550 extern int flag_isoc94;
 551
 552 /* Nonzero means use the ISO C99 dialect of C.  */
 553
 554 extern int flag_isoc99;
 555
 556 /* Nonzero means that we have builtin functions, and main is an int */
 557
 558 extern int flag_hosted;
 559
 560 /* Nonzero means add default format_arg attributes for functions not
 561    in ISO C.  */
 562
 563 extern int flag_noniso_default_format_attributes;
 564
 565 /* Nonzero means warn when casting a function call to a type that does
 566    not match the return type (e.g. (float)sqrt() or (anything*)malloc()
 567    when there is no previous declaration of sqrt or malloc.  */
 568
 569 extern int warn_bad_function_cast;
 570
 571 /* Warn about traditional constructs whose meanings changed in ANSI C.  */
 572
 573 extern int warn_traditional;
 574
 575 /* Nonzero means warn for non-prototype function decls
 576    or non-prototyped defs without previous prototype.  */
 577
 578 extern int warn_strict_prototypes;
 579
 580 /* Nonzero means warn for any global function def
 581    without separate previous decl.  */
 582
 583 extern int warn_missing_declarations;
 584
 585 /* Nonzero means warn about extern declarations of objects not at
 586    file-scope level and about *all* declarations of functions (whether
 587    extern or static) not at file-scope level.  Note that we exclude
 588    implicit function declarations.  To get warnings about those, use
 589    -Wimplicit.  */
 590
 591 extern int warn_nested_externs;
 592
 593 /* Warn if main is suspicious.  */
 594
 595 extern int warn_main;
 596
 597 /* Nonzero means warn about possible violations of sequence point rules.  */
 598
 599 extern int warn_sequence_point;
 600
 601 /* Nonzero means to warn about compile-time division by zero.  */
 602 extern int warn_div_by_zero;
 603
 604 /* Nonzero means warn about use of implicit int.  */
 605
 606 extern int warn_implicit_int;
 607
 608 /* Warn about NULL being passed to argument slots marked as requiring
 609    non-NULL.  */
 610
 611 extern int warn_nonnull;
 612
 613
 614 /* ObjC language option variables.  */
 615
 616
 617 /* Open and close the file for outputting class declarations, if
 618    requested (ObjC).  */
 619
 620 extern int flag_gen_declaration;
 621
 622 /* Generate code for GNU or NeXT runtime environment.  */
 623
 624 extern int flag_next_runtime;
 625
 626 /* Tells the compiler that this is a special run.  Do not perform any
 627    compiling, instead we are to test some platform dependent features
 628    and output a C header file with appropriate definitions.  */
 629
 630 extern int print_struct_values;
 631
 632 /* ???.  Undocumented.  */
 633
 634 extern const char *constant_string_class_name;
 635
 636 /* Warn if multiple methods are seen for the same selector, but with
 637    different argument types.  Performs the check on the whole selector
 638    table at the end of compilation.  */
 639
 640 extern int warn_selector;
 641
 642 /* Warn if a @selector() is found, and no method with that selector
 643    has been previously declared.  The check is done on each
 644    @selector() as soon as it is found - so it warns about forward
 645    declarations.  */
 646
 647 extern int warn_undeclared_selector;
 648
 649 /* Warn if methods required by a protocol are not implemented in the
 650    class adopting it.  When turned off, methods inherited to that
 651    class are also considered implemented.  */
 652
 653 extern int warn_protocol;
 654
 655
 656 /* C++ language option variables.  */
 657
 658
 659 /* Nonzero means don't recognize any extension keywords.  */
 660
 661 extern int flag_no_gnu_keywords;
 662
 663 /* Nonzero means do emit exported implementations of functions even if
 664    they can be inlined.  */
 665
 666 extern int flag_implement_inlines;
 667
 668 /* Nonzero means do emit exported implementations of templates, instead of
 669    multiple static copies in each file that needs a definition.  */
 670
 671 extern int flag_external_templates;
 672
 673 /* Nonzero means that the decision to emit or not emit the implementation of a
 674    template depends on where the template is instantiated, rather than where
 675    it is defined.  */
 676
 677 extern int flag_alt_external_templates;
 678
 679 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 680
 681 extern int flag_implicit_templates;
 682
 683 /* Nonzero means that implicit instantiations of inline templates will be
 684    emitted if needed, even if instantiations of non-inline templates
 685    aren't.  */
 686
 687 extern int flag_implicit_inline_templates;
 688
 689 /* Nonzero means generate separate instantiation control files and
 690    juggle them at link time.  */
 691
 692 extern int flag_use_repository;
 693
 694 /* Nonzero if we want to issue diagnostics that the standard says are not
 695    required.  */
 696
 697 extern int flag_optional_diags;
 698
 699 /* Nonzero means we should attempt to elide constructors when possible.  */
 700
 701 extern int flag_elide_constructors;
 702
 703 /* Nonzero means that member functions defined in class scope are
 704    inline by default.  */
 705
 706 extern int flag_default_inline;
 707
 708 /* Controls whether compiler generates 'type descriptor' that give
 709    run-time type information.  */
 710
 711 extern int flag_rtti;
 712
 713 /* Nonzero if we want to conserve space in the .o files.  We do this
 714    by putting uninitialized data and runtime initialized data into
 715    .common instead of .data at the expense of not flagging multiple
 716    definitions.  */
 717
 718 extern int flag_conserve_space;
 719
 720 /* Nonzero if we want to obey access control semantics.  */
 721
 722 extern int flag_access_control;
 723
 724 /* Nonzero if we want to check the return value of new and avoid calling
 725    constructors if it is a null pointer.  */
 726
 727 extern int flag_check_new;
 728
 729 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 730    initialization variables.
 731    0: Old rules, set by -fno-for-scope.
 732    2: New ISO rules, set by -ffor-scope.
 733    1: Try to implement new ISO rules, but with backup compatibility
 734    (and warnings).  This is the default, for now.  */
 735
 736 extern int flag_new_for_scope;
 737
 738 /* Nonzero if we want to emit defined symbols with common-like linkage as
 739    weak symbols where possible, in order to conform to C++ semantics.
 740    Otherwise, emit them as local symbols.  */
 741
 742 extern int flag_weak;
 743
 744 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 745    destructors for local statics and global objects.  */
 746
 747 extern int flag_use_cxa_atexit;
 748
 749 /* Nonzero means output .vtable_{entry,inherit} for use in doing vtable gc.  */
 750
 751 extern int flag_vtable_gc;
 752
 753 /* Nonzero means make the default pedwarns warnings instead of errors.
 754    The value of this flag is ignored if -pedantic is specified.  */
 755
 756 extern int flag_permissive;
 757
 758 /* Nonzero means to implement standard semantics for exception
 759    specifications, calling unexpected if an exception is thrown that
 760    doesn't match the specification.  Zero means to treat them as
 761    assertions and optimize accordingly, but not check them.  */
 762
 763 extern int flag_enforce_eh_specs;
 764
 765 /*  The version of the C++ ABI in use.  The following values are
 766     allowed:
 767
 768     0: The version of the ABI believed most conformant with the
 769        C++ ABI specification.  This ABI may change as bugs are
 770        discovered and fixed.  Therefore, 0 will not necessarily
 771        indicate the same ABI in different versions of G++.
 772
 773     1: The version of the ABI first used in G++ 3.2.
 774
 775     Additional positive integers will be assigned as new versions of
 776     the ABI become the default version of the ABI.  */
 777
 778 extern int flag_abi_version;
 779
 780 /* Nonzero means warn about things that will change when compiling
 781    with an ABI-compliant compiler.  */
 782
 783 extern int warn_abi;
 784
 785 /* Nonzero means warn about implicit declarations.  */
 786
 787 extern int warn_implicit;
 788
 789 /* Nonzero means warn when all ctors or dtors are private, and the class
 790    has no friends.  */
 791
 792 extern int warn_ctor_dtor_privacy;
 793
 794 /* Nonzero means warn in function declared in derived class has the
 795    same name as a virtual in the base class, but fails to match the
 796    type signature of any virtual function in the base class.  */
 797
 798 extern int warn_overloaded_virtual;
 799
 800 /* Nonzero means warn when declaring a class that has a non virtual
 801    destructor, when it really ought to have a virtual one.  */
 802
 803 extern int warn_nonvdtor;
 804
 805 /* Nonzero means warn when the compiler will reorder code.  */
 806
 807 extern int warn_reorder;
 808
 809 /* Nonzero means warn when synthesis behavior differs from Cfront's.  */
 810
 811 extern int warn_synth;
 812
 813 /* Nonzero means warn when we convert a pointer to member function
 814    into a pointer to (void or function).  */
 815
 816 extern int warn_pmf2ptr;
 817
 818 /* Nonzero means warn about violation of some Effective C++ style rules.  */
 819
 820 extern int warn_ecpp;
 821
 822 /* Nonzero means warn where overload resolution chooses a promotion from
 823    unsigned to signed over a conversion to an unsigned of the same size.  */
 824
 825 extern int warn_sign_promo;
 826
 827 /* Nonzero means warn when an old-style cast is used.  */
 828
 829 extern int warn_old_style_cast;
 830
 831 /* Nonzero means warn when non-templatized friend functions are
 832    declared within a template */
 833
 834 extern int warn_nontemplate_friend;
 835
 836 /* Nonzero means complain about deprecated features.  */
 837
 838 extern int warn_deprecated;
 839
 840 /* Maximum template instantiation depth.  This limit is rather
 841    arbitrary, but it exists to limit the time it takes to notice
 842    infinite template instantiations.  */
 843
 844 extern int max_tinst_depth;
 845
 846 /* Nonzero means the expression being parsed will never be evaluated.
 847    This is a count, since unevaluated expressions can nest.  */
 848
 849 extern int skip_evaluation;
 850
 851 /* C types are partitioned into three subsets: object, function, and
 852    incomplete types.  */
 853 #define C_TYPE_OBJECT_P(type) \
 854   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 855
 856 #define C_TYPE_INCOMPLETE_P(type) \
 857   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 858
 859 #define C_TYPE_FUNCTION_P(type) \
 860   (TREE_CODE (type) == FUNCTION_TYPE)
 861
 862 /* For convenience we define a single macro to identify the class of
 863    object or incomplete types.  */
 864 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 865   (!C_TYPE_FUNCTION_P (type))
 866
 867 /* Record in each node resulting from a binary operator
 868    what operator was specified for it.  */
 869 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
 870
 871 /* Attribute table common to the C front ends.  */
 872 extern const struct attribute_spec c_common_attribute_table[];
 873 extern const struct attribute_spec c_common_format_attribute_table[];
 874
 875 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 876    ID is the identifier to use, NAME is the string.
 877    TYPE_DEP indicates whether it depends on type of the function or not
 878    (i.e. __PRETTY_FUNCTION__).  */
 879
 880 extern tree (*make_fname_decl)                  PARAMS ((tree, int));
 881
 882 extern tree identifier_global_value             PARAMS ((tree));
 883 extern void record_builtin_type                 PARAMS ((enum rid,
 884                                                          const char *, tree));
 885 extern tree build_void_list_node                PARAMS ((void));
 886 extern void start_fname_decls                   PARAMS ((void));
 887 extern void finish_fname_decls                  PARAMS ((void));
 888 extern const char *fname_as_string              PARAMS ((int));
 889 extern tree fname_decl                          PARAMS ((unsigned, tree));
 890 extern const char *fname_string                 PARAMS ((unsigned));
 891
 892 extern void check_function_arguments            PARAMS ((tree, tree));
 893 extern void check_function_arguments_recurse    PARAMS ((void (*) (void *,
 894                                                                    tree,
 895                                                                    unsigned HOST_WIDE_INT),
 896                                                          void *, tree,
 897                                                          unsigned HOST_WIDE_INT));
 898 extern void check_function_format               PARAMS ((int *, tree, tree));
 899 extern void set_Wformat                         PARAMS ((int));
 900 extern tree handle_format_attribute             PARAMS ((tree *, tree, tree,
 901                                                          int, bool *));
 902 extern tree handle_format_arg_attribute         PARAMS ((tree *, tree, tree,
 903                                                          int, bool *));
 904 extern void c_common_insert_default_attributes  PARAMS ((tree));
 905 extern int c_common_decode_option               PARAMS ((int, char **));
 906 extern tree c_common_type_for_mode              PARAMS ((enum machine_mode,
 907                                                          int));
 908 extern tree c_common_type_for_size              PARAMS ((unsigned int, int));
 909 extern tree c_common_unsigned_type              PARAMS ((tree));
 910 extern tree c_common_signed_type                PARAMS ((tree));
 911 extern tree c_common_signed_or_unsigned_type    PARAMS ((int, tree));
 912 extern tree c_common_truthvalue_conversion      PARAMS ((tree));
 913 extern void c_apply_type_quals_to_decl          PARAMS ((int, tree));
 914 extern tree c_sizeof_or_alignof_type    PARAMS ((tree, enum tree_code, int));
 915 extern tree c_alignof_expr                      PARAMS ((tree));
 916 /* Print an error message for invalid operands to arith operation CODE.
 917    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 918 extern void binary_op_error                     PARAMS ((enum tree_code));
 919 #define my_friendly_assert(EXP, N) (void) \
 920  (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
 921
 922 extern tree c_expand_expr_stmt                  PARAMS ((tree));
 923 extern void c_expand_start_cond                 PARAMS ((tree, int, tree));
 924 extern void c_finish_then                       PARAMS ((void));
 925 extern void c_expand_start_else                 PARAMS ((void));
 926 extern void c_finish_else                       PARAMS ((void));
 927 extern void c_expand_end_cond                   PARAMS ((void));
 928 /* Validate the expression after `case' and apply default promotions.  */
 929 extern tree check_case_value                    PARAMS ((tree));
 930 extern tree fix_string_type                     PARAMS ((tree));
 931 struct varray_head_tag;
 932 extern tree combine_strings             PARAMS ((struct varray_head_tag *));
 933 extern void constant_expression_warning         PARAMS ((tree));
 934 extern tree convert_and_check                   PARAMS ((tree, tree));
 935 extern void overflow_warning                    PARAMS ((tree));
 936 extern void unsigned_conversion_warning         PARAMS ((tree, tree));
 937
 938 /* Read the rest of the current #-directive line.  */
 939 extern char *get_directive_line                 PARAMS ((void));
 940 #define GET_DIRECTIVE_LINE() get_directive_line ()
 941 #define c_sizeof(T)  c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
 942 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
 943
 944 /* Subroutine of build_binary_op, used for comparison operations.
 945    See if the operands have both been converted from subword integer types
 946    and, if so, perhaps change them both back to their original type.  */
 947 extern tree shorten_compare                     PARAMS ((tree *, tree *, tree *, enum tree_code *));
 948
 949 extern tree pointer_int_sum                     PARAMS ((enum tree_code, tree, tree));
 950 extern unsigned int min_precision               PARAMS ((tree, int));
 951
 952 /* Add qualifiers to a type, in the fashion for C.  */
 953 extern tree c_build_qualified_type              PARAMS ((tree, int));
 954
 955 /* Build tree nodes and builtin functions common to both C and C++ language
 956    frontends.  */
 957 extern void c_common_nodes_and_builtins         PARAMS ((void));
 958
 959 extern void disable_builtin_function            PARAMS ((const char *));
 960
 961 extern tree build_va_arg                        PARAMS ((tree, tree));
 962
 963 extern void c_common_init_options               PARAMS ((enum c_language_kind));
 964 extern bool c_common_post_options               PARAMS ((const char **));
 965 extern bool c_common_init                       PARAMS ((void));
 966 extern void c_common_finish                     PARAMS ((void));
 967 extern void c_common_parse_file                 PARAMS ((int));
 968 extern HOST_WIDE_INT c_common_get_alias_set     PARAMS ((tree));
 969 extern bool c_promoting_integer_type_p          PARAMS ((tree));
 970 extern int self_promoting_args_p                PARAMS ((tree));
 971 extern tree strip_array_types                   PARAMS ((tree));
 972
 973 /* These macros provide convenient access to the various _STMT nodes.  */
 974
 975 /* Nonzero if this statement should be considered a full-expression,
 976    i.e., if temporaries created during this statement should have
 977    their destructors run at the end of this statement.  (In C, this
 978    will always be false, since there are no destructors.)  */
 979 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
 980
 981 /* IF_STMT accessors. These give access to the condition of the if
 982    statement, the then block of the if statement, and the else block
 983    of the if statement if it exists.  */
 984 #define IF_COND(NODE)           TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
 985 #define THEN_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
 986 #define ELSE_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
 987
 988 /* WHILE_STMT accessors. These give access to the condition of the
 989    while statement and the body of the while statement, respectively.  */
 990 #define WHILE_COND(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
 991 #define WHILE_BODY(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
 992
 993 /* DO_STMT accessors. These give access to the condition of the do
 994    statement and the body of the do statement, respectively.  */
 995 #define DO_COND(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
 996 #define DO_BODY(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
 997
 998 /* RETURN_STMT accessors. These give the expression associated with a
 999    return statement, and whether it should be ignored when expanding
1000    (as opposed to inlining).  */
1001 #define RETURN_STMT_EXPR(NODE)  TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
1002
1003 /* EXPR_STMT accessor. This gives the expression associated with an
1004    expression statement.  */
1005 #define EXPR_STMT_EXPR(NODE)    TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
1006
1007 /* FOR_STMT accessors. These give access to the init statement,
1008    condition, update expression, and body of the for statement,
1009    respectively.  */
1010 #define FOR_INIT_STMT(NODE)     TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
1011 #define FOR_COND(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
1012 #define FOR_EXPR(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1013 #define FOR_BODY(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1014
1015 /* SWITCH_STMT accessors. These give access to the condition, body and
1016    original condition type (before any compiler conversions)
1017    of the switch statement, respectively.  */
1018 #define SWITCH_COND(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1019 #define SWITCH_BODY(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1020 #define SWITCH_TYPE(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1021
1022 /* CASE_LABEL accessors. These give access to the high and low values
1023    of a case label, respectively.  */
1024 #define CASE_LOW(NODE)          TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1025 #define CASE_HIGH(NODE)         TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1026 #define CASE_LABEL_DECL(NODE)   TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1027
1028 /* GOTO_STMT accessor. This gives access to the label associated with
1029    a goto statement.  */
1030 #define GOTO_DESTINATION(NODE)  TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1031 /* True for goto created artificially by the compiler.  */
1032 #define GOTO_FAKE_P(NODE)       (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1033
1034 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1035    statements associated with a compound statement. The result is the
1036    first statement in the list. Succeeding nodes can be accessed by
1037    calling TREE_CHAIN on a node in the list.  */
1038 #define COMPOUND_BODY(NODE)     TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1039
1040 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1041    instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1042    ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1043    statement.  */
1044 #define ASM_CV_QUAL(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1045 #define ASM_STRING(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1046 #define ASM_OUTPUTS(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1047 #define ASM_INPUTS(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1048 #define ASM_CLOBBERS(NODE)      TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1049
1050 /* DECL_STMT accessor. This gives access to the DECL associated with
1051    the given declaration statement.  */
1052 #define DECL_STMT_DECL(NODE)    TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1053
1054 /* STMT_EXPR accessor.  */
1055 #define STMT_EXPR_STMT(NODE)    TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1056
1057 /* Nonzero if this statement-expression does not have an associated scope.  */
1058 #define STMT_EXPR_NO_SCOPE(NODE) \
1059    TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1060
1061 /* LABEL_STMT accessor. This gives access to the label associated with
1062    the given label statement.  */
1063 #define LABEL_STMT_LABEL(NODE)  TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1064
1065 /* COMPOUND_LITERAL_EXPR accessors.  */
1066 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE)           \
1067   TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1068 #define COMPOUND_LITERAL_EXPR_DECL(NODE)                        \
1069   DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1070
1071 /* Nonzero if this SCOPE_STMT is for the beginning of a scope.  */
1072 #define SCOPE_BEGIN_P(NODE) \
1073   (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1074
1075 /* Nonzero if this SCOPE_STMT is for the end of a scope.  */
1076 #define SCOPE_END_P(NODE) \
1077   (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1078
1079 /* The BLOCK containing the declarations contained in this scope.  */
1080 #define SCOPE_STMT_BLOCK(NODE) \
1081   (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1082
1083 /* Nonzero for a SCOPE_STMT if there were no variables in this scope.  */
1084 #define SCOPE_NULLIFIED_P(NODE) \
1085   (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1086
1087 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1088    which should be treated as non-existent from the point of view of
1089    running cleanup actions.  */
1090 #define SCOPE_NO_CLEANUPS_P(NODE) \
1091   (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1092
1093 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1094    For example, in:
1095
1096      S s;
1097      l:
1098      S s2;
1099      goto l;
1100
1101    there is (implicitly) a new scope after `l', even though there are
1102    no curly braces.  In particular, when we hit the goto, we must
1103    destroy s2 and then re-construct it.  For the implicit scope,
1104    SCOPE_PARTIAL_P will be set.  */
1105 #define SCOPE_PARTIAL_P(NODE) \
1106   (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1107
1108 /* Nonzero for an ASM_STMT if the assembly statement is volatile.  */
1109 #define ASM_VOLATILE_P(NODE)                    \
1110   (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1111
1112 /* The VAR_DECL to clean up in a CLEANUP_STMT.  */
1113 #define CLEANUP_DECL(NODE) \
1114   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1115 /* The cleanup to run in a CLEANUP_STMT.  */
1116 #define CLEANUP_EXPR(NODE) \
1117   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1118
1119 /* The filename we are changing to as of this FILE_STMT.  */
1120 #define FILE_STMT_FILENAME_NODE(NODE) \
1121   (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1122 #define FILE_STMT_FILENAME(NODE) \
1123   (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1124
1125 /* The line-number at which a statement began.  But if
1126    STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1127    line number for the end of the current function instead.  */
1128 #define STMT_LINENO(NODE)                       \
1129   (TREE_COMPLEXITY ((NODE)))
1130
1131 /* If nonzero, the STMT_LINENO for NODE is the line at which the
1132    function ended.  */
1133 #define STMT_LINENO_FOR_FN_P(NODE)              \
1134   (TREE_LANG_FLAG_2 ((NODE)))
1135
1136 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1137    initialization variables.  */
1138 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1139
1140 /* Nonzero if we want to create an ASM_INPUT instead of an
1141    ASM_OPERAND with no operands.  */
1142 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1143
1144 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1145
1146 enum c_tree_code {
1147   C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1148 #include "c-common.def"
1149   LAST_C_TREE_CODE
1150 };
1151
1152 #undef DEFTREECODE
1153
1154 extern void genrtl_do_pushlevel                 PARAMS ((void));
1155 extern void genrtl_goto_stmt                    PARAMS ((tree));
1156 extern void genrtl_expr_stmt                    PARAMS ((tree));
1157 extern void genrtl_expr_stmt_value              PARAMS ((tree, int, int));
1158 extern void genrtl_decl_stmt                    PARAMS ((tree));
1159 extern void genrtl_if_stmt                      PARAMS ((tree));
1160 extern void genrtl_while_stmt                   PARAMS ((tree));
1161 extern void genrtl_do_stmt                      PARAMS ((tree));
1162 extern void genrtl_return_stmt                  PARAMS ((tree));
1163 extern void genrtl_for_stmt                     PARAMS ((tree));
1164 extern void genrtl_break_stmt                   PARAMS ((void));
1165 extern void genrtl_continue_stmt                PARAMS ((void));
1166 extern void genrtl_scope_stmt                   PARAMS ((tree));
1167 extern void genrtl_switch_stmt                  PARAMS ((tree));
1168 extern void genrtl_case_label                   PARAMS ((tree));
1169 extern void genrtl_compound_stmt                PARAMS ((tree));
1170 extern void genrtl_asm_stmt                     PARAMS ((tree, tree,
1171                                                          tree, tree,
1172                                                          tree, int));
1173 extern void genrtl_decl_cleanup                 PARAMS ((tree));
1174 extern int stmts_are_full_exprs_p               PARAMS ((void));
1175 extern int anon_aggr_type_p                     PARAMS ((tree));
1176
1177 /* For a VAR_DECL that is an anonymous union, these are the various
1178    sub-variables that make up the anonymous union.  */
1179 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1180
1181 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
1182 #define DECL_C_BIT_FIELD(NODE) \
1183   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1184 #define SET_DECL_C_BIT_FIELD(NODE) \
1185   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1186 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1187   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1188
1189 /* In a VAR_DECL, nonzero if the decl is a register variable with
1190    an explicit asm specification.  */
1191 #define DECL_C_HARD_REGISTER(DECL)  DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1192
1193 extern void emit_local_var                      PARAMS ((tree));
1194 extern void make_rtl_for_local_static           PARAMS ((tree));
1195 extern tree expand_cond                         PARAMS ((tree));
1196 extern tree c_expand_return                     PARAMS ((tree));
1197 extern tree do_case                             PARAMS ((tree, tree));
1198 extern tree build_stmt                          PARAMS ((enum tree_code, ...));
1199 extern tree build_case_label                    PARAMS ((tree, tree, tree));
1200 extern tree build_continue_stmt                 PARAMS ((void));
1201 extern tree build_break_stmt                    PARAMS ((void));
1202 extern tree build_return_stmt                   PARAMS ((tree));
1203
1204 #define COMPOUND_STMT_NO_SCOPE(NODE)    TREE_LANG_FLAG_0 (NODE)
1205
1206 /* Used by the C++ frontend to mark the block around the member
1207    initializers and cleanups.  */
1208 #define COMPOUND_STMT_BODY_BLOCK(NODE)  TREE_LANG_FLAG_3 (NODE)
1209
1210 extern void c_expand_asm_operands               PARAMS ((tree, tree, tree, tree, int, const char *, int));
1211
1212 /* These functions must be defined by each front-end which implements
1213    a variant of the C language.  They are used in c-common.c.  */
1214
1215 extern tree build_unary_op                      PARAMS ((enum tree_code,
1216                                                          tree, int));
1217 extern tree build_binary_op                     PARAMS ((enum tree_code,
1218                                                          tree, tree, int));
1219 extern int lvalue_p                             PARAMS ((tree));
1220 extern tree default_conversion                  PARAMS ((tree));
1221
1222 /* Given two integer or real types, return the type for their sum.
1223    Given two compatible ANSI C types, returns the merged type.  */
1224
1225 extern tree common_type                         PARAMS ((tree, tree));
1226
1227 extern tree expand_tree_builtin                 PARAMS ((tree, tree, tree));
1228
1229 extern tree decl_constant_value         PARAMS ((tree));
1230
1231 /* Handle increment and decrement of boolean types.  */
1232 extern tree boolean_increment                   PARAMS ((enum tree_code,
1233                                                          tree));
1234
1235 /* Hook currently used only by the C++ front end to reset internal state
1236    after entering or leaving a header file.  */
1237 extern void extract_interface_info              PARAMS ((void));
1238
1239 extern int case_compare                         PARAMS ((splay_tree_key,
1240                                                          splay_tree_key));
1241
1242 extern tree c_add_case_label                    PARAMS ((splay_tree,
1243                                                          tree, tree,
1244                                                          tree));
1245
1246 extern tree build_function_call                 PARAMS ((tree, tree));
1247
1248 extern tree finish_label_address_expr           PARAMS ((tree));
1249
1250 /* Same function prototype, but the C and C++ front ends have
1251    different implementations.  Used in c-common.c.  */
1252 extern tree lookup_label                        PARAMS ((tree));
1253
1254 extern rtx c_expand_expr                        PARAMS ((tree, rtx,
1255                                                          enum machine_mode,
1256                                                          int));
1257
1258 extern int c_safe_from_p                        PARAMS ((rtx, tree));
1259
1260 extern int c_staticp                            PARAMS ((tree));
1261
1262 extern int c_common_unsafe_for_reeval           PARAMS ((tree));
1263
1264 extern void init_c_lex                          PARAMS ((void));
1265
1266 extern void cb_register_builtins                PARAMS ((cpp_reader *));
1267
1268 /* Positive if an implicit `extern "C"' scope has just been entered;
1269    negative if such a scope has just been exited.  */
1270 extern int pending_lang_change;
1271
1272 /* Information recorded about each file examined during compilation.  */
1273
1274 struct c_fileinfo
1275 {
1276   int time;     /* Time spent in the file.  */
1277   short interface_only;         /* Flags - used only by C++ */
1278   short interface_unknown;
1279 };
1280
1281 struct c_fileinfo *get_fileinfo                 PARAMS ((const char *));
1282 extern void dump_time_statistics                PARAMS ((void));
1283
1284 extern int c_dump_tree                          PARAMS ((void *, tree));
1285
1286 extern void pch_init                            PARAMS ((void));
1287 extern int c_common_valid_pch                   PARAMS ((cpp_reader *pfile,
1288                                                          const char *name,
1289                                                          int fd));
1290 extern void c_common_read_pch                   PARAMS ((cpp_reader *pfile,
1291                                                          const char *name,
1292                                                          int fd,
1293                                                          const char *orig));
1294 extern void c_common_write_pch                  PARAMS ((void));
1295 extern void builtin_define_with_value           PARAMS ((const char *,
1296                                                          const char *, int));
1297 extern void c_stddef_cpp_builtins               PARAMS ((void));
1298
1299 /* In c-ppoutput.c  */
1300 extern void init_pp_output                      PARAMS ((FILE *));
1301 extern void preprocess_file                     PARAMS ((cpp_reader *));
1302
1303 #endif /* ! GCC_C_COMMON_H */