gcc/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
   3    1999, 2000, 2001, 2002, 2003 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 #include "ggc.h"
  28
  29 /* Usage of TREE_LANG_FLAG_?:
  30    0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
  31       TREE_NEGATED_INT (in INTEGER_CST).
  32       IDENTIFIER_MARKED (used by search routines).
  33       SCOPE_BEGIN_P (in SCOPE_STMT)
  34       DECL_PRETTY_FUNCTION_P (in VAR_DECL)
  35       NEW_FOR_SCOPE_P (in FOR_STMT)
  36       ASM_INPUT_P (in ASM_STMT)
  37       STMT_EXPR_NO_SCOPE (in STMT_EXPR)
  38    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  39       STMT_IS_FULL_EXPR_P (in _STMT)
  40    2: STMT_LINENO_FOR_FN_P (in _STMT)
  41    3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
  42       COMPOUND_STMT_BODY_BLOCK (in COMPOUND_STMT)
  43    4: SCOPE_PARTIAL_P (in SCOPE_STMT)
  44 */
  45
  46 /* Reserved identifiers.  This is the union of all the keywords for C,
  47    C++, and Objective-C.  All the type modifiers have to be in one
  48    block at the beginning, because they are used as mask bits.  There
  49    are 27 type modifiers; if we add many more we will have to redesign
  50    the mask mechanism.  */
  51
  52 enum rid
  53 {
  54   /* Modifiers: */
  55   /* C, in empirical order of frequency.  */
  56   RID_STATIC = 0,
  57   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  58   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  59   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  60
  61   /* C extensions */
  62   RID_COMPLEX, RID_THREAD,
  63
  64   /* C++ */
  65   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  66
  67   /* ObjC */
  68   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  69
  70   /* C */
  71   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  72   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  73   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  74   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  75   RID_SIZEOF,
  76
  77   /* C extensions */
  78   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
  79   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_PTRBASE,
  80   RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
  81
  82   /* Too many ways of getting the name of a function as a string */
  83   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
  84
  85   /* C++ */
  86   RID_BOOL,     RID_WCHAR,    RID_CLASS,
  87   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
  88   RID_TEMPLATE, RID_NULL,     RID_CATCH,
  89   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
  90   RID_NEW,      RID_OPERATOR, RID_THIS,
  91   RID_THROW,    RID_TRUE,     RID_TRY,
  92   RID_TYPENAME, RID_TYPEID,   RID_USING,
  93
  94   /* casts */
  95   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
  96
  97   /* Objective-C */
  98   RID_ID,          RID_AT_ENCODE,    RID_AT_END,
  99   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 100   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
 101   RID_AT_PROTOCOL, RID_AT_SELECTOR,  RID_AT_INTERFACE,
 102   RID_AT_IMPLEMENTATION,
 103
 104   RID_MAX,
 105
 106   RID_FIRST_MODIFIER = RID_STATIC,
 107   RID_LAST_MODIFIER = RID_ONEWAY,
 108
 109   RID_FIRST_AT = RID_AT_ENCODE,
 110   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 111   RID_FIRST_PQ = RID_IN,
 112   RID_LAST_PQ = RID_ONEWAY
 113 };
 114
 115 #define OBJC_IS_AT_KEYWORD(rid) \
 116   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
 117    (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
 118
 119 #define OBJC_IS_PQ_KEYWORD(rid) \
 120   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
 121    (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
 122
 123 /* The elements of `ridpointers' are identifier nodes for the reserved
 124    type names and storage classes.  It is indexed by a RID_... value.  */
 125 extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
 126
 127 /* Standard named or nameless data types of the C compiler.  */
 128
 129 enum c_tree_index
 130 {
 131     CTI_WCHAR_TYPE,
 132     CTI_SIGNED_WCHAR_TYPE,
 133     CTI_UNSIGNED_WCHAR_TYPE,
 134     CTI_WINT_TYPE,
 135     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 136     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 137     CTI_INTMAX_TYPE,
 138     CTI_UINTMAX_TYPE,
 139     CTI_WIDEST_INT_LIT_TYPE,
 140     CTI_WIDEST_UINT_LIT_TYPE,
 141
 142     CTI_CHAR_ARRAY_TYPE,
 143     CTI_WCHAR_ARRAY_TYPE,
 144     CTI_INT_ARRAY_TYPE,
 145     CTI_STRING_TYPE,
 146     CTI_CONST_STRING_TYPE,
 147
 148     /* Type for boolean expressions (bool in C++, int in C).  */
 149     CTI_TRUTHVALUE_TYPE,
 150     CTI_TRUTHVALUE_TRUE,
 151     CTI_TRUTHVALUE_FALSE,
 152
 153     CTI_DEFAULT_FUNCTION_TYPE,
 154
 155     CTI_G77_INTEGER_TYPE,
 156     CTI_G77_UINTEGER_TYPE,
 157     CTI_G77_LONGINT_TYPE,
 158     CTI_G77_ULONGINT_TYPE,
 159
 160     /* These are not types, but we have to look them up all the time.  */
 161     CTI_FUNCTION_NAME_DECL,
 162     CTI_PRETTY_FUNCTION_NAME_DECL,
 163     CTI_C99_FUNCTION_NAME_DECL,
 164     CTI_SAVED_FUNCTION_NAME_DECLS,
 165
 166     CTI_VOID_ZERO,
 167
 168     CTI_MAX
 169 };
 170
 171 #define C_RID_CODE(id)  (((struct c_common_identifier *) (id))->node.rid_code)
 172
 173 /* Identifier part common to the C front ends.  Inherits from
 174    tree_identifier, despite appearances.  */
 175 struct c_common_identifier GTY(())
 176 {
 177   struct tree_common common;
 178   struct cpp_hashnode node;
 179 };
 180
 181 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 182 #define signed_wchar_type_node          c_global_trees[CTI_SIGNED_WCHAR_TYPE]
 183 #define unsigned_wchar_type_node        c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
 184 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 185 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 186 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 187 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 188 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 189 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 190 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 191
 192 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 193 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 194 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 195
 196 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 197 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 198 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 199 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 200 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 201
 202 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 203
 204 /* g77 integer types, which which must be kept in sync with f/com.h */
 205 #define g77_integer_type_node           c_global_trees[CTI_G77_INTEGER_TYPE]
 206 #define g77_uinteger_type_node          c_global_trees[CTI_G77_UINTEGER_TYPE]
 207 #define g77_longint_type_node           c_global_trees[CTI_G77_LONGINT_TYPE]
 208 #define g77_ulongint_type_node          c_global_trees[CTI_G77_ULONGINT_TYPE]
 209
 210 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 211 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 212 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 213 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 214
 215 /* A node for `((void) 0)'.  */
 216 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 217
 218 extern GTY(()) tree c_global_trees[CTI_MAX];
 219
 220 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a tree for size reasons.  */
 221 struct sorted_fields_type GTY(())
 222 {
 223   int len;
 224   tree GTY((length ("%h.len"))) elts[1];
 225 };
 226
 227 /* Mark which labels are explicitly declared.
 228    These may be shadowed, and may be referenced from nested functions.  */
 229 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 230
 231 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
 232    warning if they undergo concatenation.  */
 233 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
 234
 235 typedef enum c_language_kind
 236 {
 237   clk_c         = 0,            /* C90, C94 or C99 */
 238   clk_objc      = 1,            /* clk_c with ObjC features.  */
 239   clk_cxx       = 2,            /* ANSI/ISO C++ */
 240   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 241 }
 242 c_language_kind;
 243
 244 /* To test for a specific language use c_language, defined by each
 245    front end.  For "ObjC features" or "not C++" use the macros.  */
 246 extern c_language_kind c_language;
 247
 248 #define c_dialect_cxx()         (c_language & clk_cxx)
 249 #define c_dialect_objc()        (c_language & clk_objc)
 250
 251 /* Information about a statement tree.  */
 252
 253 struct stmt_tree_s GTY(()) {
 254   /* The last statement added to the tree.  */
 255   tree x_last_stmt;
 256   /* The type of the last expression statement.  (This information is
 257      needed to implement the statement-expression extension.)  */
 258   tree x_last_expr_type;
 259   /* The last filename we recorded.  */
 260   const char *x_last_expr_filename;
 261   /* In C++, Nonzero if we should treat statements as full
 262      expressions.  In particular, this variable is no-zero if at the
 263      end of a statement we should destroy any temporaries created
 264      during that statement.  Similarly, if, at the end of a block, we
 265      should destroy any local variables in this block.  Normally, this
 266      variable is nonzero, since those are the normal semantics of
 267      C++.
 268
 269      However, in order to represent aggregate initialization code as
 270      tree structure, we use statement-expressions.  The statements
 271      within the statement expression should not result in cleanups
 272      being run until the entire enclosing statement is complete.
 273
 274      This flag has no effect in C.  */
 275   int stmts_are_full_exprs_p;
 276 };
 277
 278 typedef struct stmt_tree_s *stmt_tree;
 279
 280 /* Global state pertinent to the current function.  Some C dialects
 281    extend this structure with additional fields.  */
 282
 283 struct c_language_function GTY(()) {
 284   /* While we are parsing the function, this contains information
 285      about the statement-tree that we are building.  */
 286   struct stmt_tree_s x_stmt_tree;
 287   /* The stack of SCOPE_STMTs for the current function.  */
 288   tree x_scope_stmt_stack;
 289 };
 290
 291 /* When building a statement-tree, this is the last statement added to
 292    the tree.  */
 293
 294 #define last_tree (current_stmt_tree ()->x_last_stmt)
 295
 296 /* The type of the last expression-statement we have seen.  */
 297
 298 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
 299
 300 /* The name of the last file we have seen.  */
 301
 302 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
 303
 304 /* LAST_TREE contains the last statement parsed.  These are chained
 305    together through the TREE_CHAIN field, but often need to be
 306    re-organized since the parse is performed bottom-up.  This macro
 307    makes LAST_TREE the indicated SUBSTMT of STMT.  */
 308
 309 #define RECHAIN_STMTS(stmt, substmt)            \
 310   do {                                          \
 311     substmt = TREE_CHAIN (stmt);                \
 312     TREE_CHAIN (stmt) = NULL_TREE;              \
 313     last_tree = stmt;                           \
 314   } while (0)
 315
 316 /* Language-specific hooks.  */
 317
 318 extern void (*lang_expand_stmt) (tree);
 319 extern void (*lang_expand_decl_stmt) (tree);
 320 extern void (*lang_expand_function_end) (void);
 321 extern tree gettags (void);
 322
 323 /* Callback that determines if it's ok for a function to have no
 324    noreturn attribute.  */
 325 extern int (*lang_missing_noreturn_ok_p) (tree);
 326
 327 extern int yyparse (void);
 328 extern void free_parser_stacks (void);
 329
 330 extern stmt_tree current_stmt_tree (void);
 331 extern tree *current_scope_stmt_stack (void);
 332 extern void begin_stmt_tree (tree *);
 333 extern tree add_stmt (tree);
 334 extern void add_decl_stmt (tree);
 335 extern tree add_scope_stmt (int, int);
 336 extern void finish_stmt_tree (tree *);
 337
 338 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
 339 extern void prep_stmt (tree);
 340 extern void expand_stmt (tree);
 341 extern tree c_begin_if_stmt (void);
 342 extern tree c_begin_while_stmt (void);
 343 extern void c_finish_while_stmt_cond (tree, tree);
 344
 345 enum sw_kind { SW_PARAM = 0, SW_LOCAL, SW_GLOBAL };
 346 extern void shadow_warning (enum sw_kind, const char *, tree);
 347 extern int field_decl_cmp (const void *, const void *);
 348 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 349                                   void *);
 350
 351 /* Extra information associated with a DECL.  Other C dialects extend
 352    this structure in various ways.  The C front-end only uses this
 353    structure for FUNCTION_DECLs; all other DECLs have a NULL
 354    DECL_LANG_SPECIFIC field.  */
 355
 356 struct c_lang_decl GTY(()) {
 357   unsigned declared_inline : 1;
 358 };
 359
 360 /* In a FUNCTION_DECL for which DECL_BUILT_IN does not hold, this is
 361      the approximate number of statements in this function.  There is
 362      no need for this number to be exact; it is only used in various
 363      heuristics regarding optimization.  */
 364 #define DECL_ESTIMATED_INSNS(NODE) \
 365   (FUNCTION_DECL_CHECK (NODE)->decl.u1.i)
 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 if -undef was given.  It suppresses target built-in macros
 402    and assertions.  */
 403
 404 extern int flag_undef;
 405
 406 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 407
 408 extern int flag_no_builtin;
 409
 410 /* Nonzero means don't recognize the non-ANSI builtin functions.
 411    -ansi sets this.  */
 412
 413 extern int flag_no_nonansi_builtin;
 414
 415 /* Nonzero means give `double' the same size as `float'.  */
 416
 417 extern int flag_short_double;
 418
 419 /* Nonzero means give `wchar_t' the same size as `short'.  */
 420
 421 extern int flag_short_wchar;
 422
 423 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 424 extern int flag_ms_extensions;
 425
 426 /* Nonzero means don't recognize the keyword `asm'.  */
 427
 428 extern int flag_no_asm;
 429
 430 /* Nonzero means give string constants the type `const char *', as mandated
 431    by the standard.  */
 432
 433 extern int flag_const_strings;
 434
 435 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 436
 437 extern int flag_signed_bitfields;
 438 extern int explicit_flag_signed_bitfields;
 439
 440 /* Nonzero means warn about pointer casts that can drop a type qualifier
 441    from the pointer target type.  */
 442
 443 extern int warn_cast_qual;
 444
 445 /* Warn about functions which might be candidates for format attributes.  */
 446
 447 extern int warn_missing_format_attribute;
 448
 449 /* Nonzero means warn about sizeof(function) or addition/subtraction
 450    of function pointers.  */
 451
 452 extern int warn_pointer_arith;
 453
 454 /* Nonzero means warn for any global function def
 455    without separate previous prototype decl.  */
 456
 457 extern int warn_missing_prototypes;
 458
 459 /* Warn if adding () is suggested.  */
 460
 461 extern int warn_parentheses;
 462
 463 /* Warn if initializer is not completely bracketed.  */
 464
 465 extern int warn_missing_braces;
 466
 467 /* Warn about comparison of signed and unsigned values.
 468    If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified.  */
 469
 470 extern int warn_sign_compare;
 471
 472 /* Nonzero means warn about usage of long long when `-pedantic'.  */
 473
 474 extern int warn_long_long;
 475
 476 /* Nonzero means warn about deprecated conversion from string constant to
 477    `char *'.  */
 478
 479 extern int warn_write_strings;
 480
 481 /* Nonzero means warn about multiple (redundant) decls for the same single
 482    variable or function.  */
 483
 484 extern int warn_redundant_decls;
 485
 486 /* Warn about testing equality of floating point numbers.  */
 487
 488 extern int warn_float_equal;
 489
 490 /* Warn about a subscript that has type char.  */
 491
 492 extern int warn_char_subscripts;
 493
 494 /* Warn if a type conversion is done that might have confusing results.  */
 495
 496 extern int warn_conversion;
 497
 498 /* Warn about #pragma directives that are not recognized.  */
 499
 500 extern int warn_unknown_pragmas; /* Tri state variable.  */
 501
 502 /* Warn about format/argument anomalies in calls to formatted I/O functions
 503    (*printf, *scanf, strftime, strfmon, etc.).  */
 504
 505 extern int warn_format;
 506
 507 /* Warn about Y2K problems with strftime formats.  */
 508
 509 extern int warn_format_y2k;
 510
 511 /* Warn about excess arguments to formats.  */
 512
 513 extern int warn_format_extra_args;
 514
 515 /* Warn about zero-length formats.  */
 516
 517 extern int warn_format_zero_length;
 518
 519 /* Warn about non-literal format arguments.  */
 520
 521 extern int warn_format_nonliteral;
 522
 523 /* Warn about possible security problems with calls to format functions.  */
 524
 525 extern int warn_format_security;
 526
 527
 528 /* C/ObjC language option variables.  */
 529
 530
 531 /* Nonzero means message about use of implicit function declarations;
 532  1 means warning; 2 means error.  */
 533
 534 extern int mesg_implicit_function_declaration;
 535
 536 /* Nonzero means allow type mismatches in conditional expressions;
 537    just make their values `void'.  */
 538
 539 extern int flag_cond_mismatch;
 540
 541 /* Nonzero means enable C89 Amendment 1 features.  */
 542
 543 extern int flag_isoc94;
 544
 545 /* Nonzero means use the ISO C99 dialect of C.  */
 546
 547 extern int flag_isoc99;
 548
 549 /* Nonzero means that we have builtin functions, and main is an int */
 550
 551 extern int flag_hosted;
 552
 553 /* Nonzero means add default format_arg attributes for functions not
 554    in ISO C.  */
 555
 556 extern int flag_noniso_default_format_attributes;
 557
 558 /* Nonzero means warn when casting a function call to a type that does
 559    not match the return type (e.g. (float)sqrt() or (anything*)malloc()
 560    when there is no previous declaration of sqrt or malloc.  */
 561
 562 extern int warn_bad_function_cast;
 563
 564 /* Warn about traditional constructs whose meanings changed in ANSI C.  */
 565
 566 extern int warn_traditional;
 567
 568 /* Nonzero means warn for a declaration found after a statement.  */
 569
 570 extern int warn_declaration_after_statement;
 571
 572 /* Nonzero means warn for non-prototype function decls
 573    or non-prototyped defs without previous prototype.  */
 574
 575 extern int warn_strict_prototypes;
 576
 577 /* Nonzero means warn for any global function def
 578    without separate previous decl.  */
 579
 580 extern int warn_missing_declarations;
 581
 582 /* Nonzero means warn about extern declarations of objects not at
 583    file-scope level and about *all* declarations of functions (whether
 584    extern or static) not at file-scope level.  Note that we exclude
 585    implicit function declarations.  To get warnings about those, use
 586    -Wimplicit.  */
 587
 588 extern int warn_nested_externs;
 589
 590 /* Warn if main is suspicious.  */
 591
 592 extern int warn_main;
 593
 594 /* Nonzero means warn about possible violations of sequence point rules.  */
 595
 596 extern int warn_sequence_point;
 597
 598 /* Nonzero means to warn about compile-time division by zero.  */
 599 extern int warn_div_by_zero;
 600
 601 /* Nonzero means warn about use of implicit int.  */
 602
 603 extern int warn_implicit_int;
 604
 605 /* Warn about NULL being passed to argument slots marked as requiring
 606    non-NULL.  */
 607
 608 extern int warn_nonnull;
 609
 610
 611 /* ObjC language option variables.  */
 612
 613
 614 /* Open and close the file for outputting class declarations, if
 615    requested (ObjC).  */
 616
 617 extern int flag_gen_declaration;
 618
 619 /* Generate code for GNU or NeXT runtime environment.  */
 620
 621 extern int flag_next_runtime;
 622
 623 /* Tells the compiler that this is a special run.  Do not perform any
 624    compiling, instead we are to test some platform dependent features
 625    and output a C header file with appropriate definitions.  */
 626
 627 extern int print_struct_values;
 628
 629 /* ???.  Undocumented.  */
 630
 631 extern const char *constant_string_class_name;
 632
 633 /* Warn if multiple methods are seen for the same selector, but with
 634    different argument types.  Performs the check on the whole selector
 635    table at the end of compilation.  */
 636
 637 extern int warn_selector;
 638
 639 /* Warn if a @selector() is found, and no method with that selector
 640    has been previously declared.  The check is done on each
 641    @selector() as soon as it is found - so it warns about forward
 642    declarations.  */
 643
 644 extern int warn_undeclared_selector;
 645
 646 /* Warn if methods required by a protocol are not implemented in the
 647    class adopting it.  When turned off, methods inherited to that
 648    class are also considered implemented.  */
 649
 650 extern int warn_protocol;
 651
 652
 653 /* C++ language option variables.  */
 654
 655
 656 /* Nonzero means don't recognize any extension keywords.  */
 657
 658 extern int flag_no_gnu_keywords;
 659
 660 /* Nonzero means do emit exported implementations of functions even if
 661    they can be inlined.  */
 662
 663 extern int flag_implement_inlines;
 664
 665 /* Nonzero means do emit exported implementations of templates, instead of
 666    multiple static copies in each file that needs a definition.  */
 667
 668 extern int flag_external_templates;
 669
 670 /* Nonzero means that the decision to emit or not emit the implementation of a
 671    template depends on where the template is instantiated, rather than where
 672    it is defined.  */
 673
 674 extern int flag_alt_external_templates;
 675
 676 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 677
 678 extern int flag_implicit_templates;
 679
 680 /* Nonzero means that implicit instantiations of inline templates will be
 681    emitted if needed, even if instantiations of non-inline templates
 682    aren't.  */
 683
 684 extern int flag_implicit_inline_templates;
 685
 686 /* Nonzero means generate separate instantiation control files and
 687    juggle them at link time.  */
 688
 689 extern int flag_use_repository;
 690
 691 /* Nonzero if we want to issue diagnostics that the standard says are not
 692    required.  */
 693
 694 extern int flag_optional_diags;
 695
 696 /* Nonzero means we should attempt to elide constructors when possible.  */
 697
 698 extern int flag_elide_constructors;
 699
 700 /* Nonzero means that member functions defined in class scope are
 701    inline by default.  */
 702
 703 extern int flag_default_inline;
 704
 705 /* Controls whether compiler generates 'type descriptor' that give
 706    run-time type information.  */
 707
 708 extern int flag_rtti;
 709
 710 /* Nonzero if we want to conserve space in the .o files.  We do this
 711    by putting uninitialized data and runtime initialized data into
 712    .common instead of .data at the expense of not flagging multiple
 713    definitions.  */
 714
 715 extern int flag_conserve_space;
 716
 717 /* Nonzero if we want to obey access control semantics.  */
 718
 719 extern int flag_access_control;
 720
 721 /* Nonzero if we want to check the return value of new and avoid calling
 722    constructors if it is a null pointer.  */
 723
 724 extern int flag_check_new;
 725
 726 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 727    initialization variables.
 728    0: Old rules, set by -fno-for-scope.
 729    2: New ISO rules, set by -ffor-scope.
 730    1: Try to implement new ISO rules, but with backup compatibility
 731    (and warnings).  This is the default, for now.  */
 732
 733 extern int flag_new_for_scope;
 734
 735 /* Nonzero if we want to emit defined symbols with common-like linkage as
 736    weak symbols where possible, in order to conform to C++ semantics.
 737    Otherwise, emit them as local symbols.  */
 738
 739 extern int flag_weak;
 740
 741 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 742    destructors for local statics and global objects.  */
 743
 744 extern int flag_use_cxa_atexit;
 745
 746 /* Nonzero means make the default pedwarns warnings instead of errors.
 747    The value of this flag is ignored if -pedantic is specified.  */
 748
 749 extern int flag_permissive;
 750
 751 /* Nonzero means to implement standard semantics for exception
 752    specifications, calling unexpected if an exception is thrown that
 753    doesn't match the specification.  Zero means to treat them as
 754    assertions and optimize accordingly, but not check them.  */
 755
 756 extern int flag_enforce_eh_specs;
 757
 758 /*  The version of the C++ ABI in use.  The following values are
 759     allowed:
 760
 761     0: The version of the ABI believed most conformant with the
 762        C++ ABI specification.  This ABI may change as bugs are
 763        discovered and fixed.  Therefore, 0 will not necessarily
 764        indicate the same ABI in different versions of G++.
 765
 766     1: The version of the ABI first used in G++ 3.2.
 767
 768     Additional positive integers will be assigned as new versions of
 769     the ABI become the default version of the ABI.  */
 770
 771 extern int flag_abi_version;
 772
 773 /* Nonzero means warn about things that will change when compiling
 774    with an ABI-compliant compiler.  */
 775
 776 extern int warn_abi;
 777
 778 /* Nonzero means warn about invalid uses of offsetof.  */
 779
 780 extern int warn_invalid_offsetof;
 781
 782 /* Nonzero means warn about implicit declarations.  */
 783
 784 extern int warn_implicit;
 785
 786 /* Nonzero means warn when all ctors or dtors are private, and the class
 787    has no friends.  */
 788
 789 extern int warn_ctor_dtor_privacy;
 790
 791 /* Nonzero means warn in function declared in derived class has the
 792    same name as a virtual in the base class, but fails to match the
 793    type signature of any virtual function in the base class.  */
 794
 795 extern int warn_overloaded_virtual;
 796
 797 /* Nonzero means warn when declaring a class that has a non virtual
 798    destructor, when it really ought to have a virtual one.  */
 799
 800 extern int warn_nonvdtor;
 801
 802 /* Nonzero means warn when the compiler will reorder code.  */
 803
 804 extern int warn_reorder;
 805
 806 /* Nonzero means warn when synthesis behavior differs from Cfront's.  */
 807
 808 extern int warn_synth;
 809
 810 /* Nonzero means warn when we convert a pointer to member function
 811    into a pointer to (void or function).  */
 812
 813 extern int warn_pmf2ptr;
 814
 815 /* Nonzero means warn about violation of some Effective C++ style rules.  */
 816
 817 extern int warn_ecpp;
 818
 819 /* Nonzero means warn where overload resolution chooses a promotion from
 820    unsigned to signed over a conversion to an unsigned of the same size.  */
 821
 822 extern int warn_sign_promo;
 823
 824 /* Nonzero means warn when an old-style cast is used.  */
 825
 826 extern int warn_old_style_cast;
 827
 828 /* Nonzero means warn when non-templatized friend functions are
 829    declared within a template */
 830
 831 extern int warn_nontemplate_friend;
 832
 833 /* Nonzero means complain about deprecated features.  */
 834
 835 extern int warn_deprecated;
 836
 837 /* Maximum template instantiation depth.  This limit is rather
 838    arbitrary, but it exists to limit the time it takes to notice
 839    infinite template instantiations.  */
 840
 841 extern int max_tinst_depth;
 842
 843 /* Nonzero means the expression being parsed will never be evaluated.
 844    This is a count, since unevaluated expressions can nest.  */
 845
 846 extern int skip_evaluation;
 847
 848 /* C types are partitioned into three subsets: object, function, and
 849    incomplete types.  */
 850 #define C_TYPE_OBJECT_P(type) \
 851   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 852
 853 #define C_TYPE_INCOMPLETE_P(type) \
 854   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 855
 856 #define C_TYPE_FUNCTION_P(type) \
 857   (TREE_CODE (type) == FUNCTION_TYPE)
 858
 859 /* For convenience we define a single macro to identify the class of
 860    object or incomplete types.  */
 861 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 862   (!C_TYPE_FUNCTION_P (type))
 863
 864 /* Record in each node resulting from a binary operator
 865    what operator was specified for it.  */
 866 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
 867
 868 /* Attribute table common to the C front ends.  */
 869 extern const struct attribute_spec c_common_attribute_table[];
 870 extern const struct attribute_spec c_common_format_attribute_table[];
 871
 872 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 873    ID is the identifier to use, NAME is the string.
 874    TYPE_DEP indicates whether it depends on type of the function or not
 875    (i.e. __PRETTY_FUNCTION__).  */
 876
 877 extern tree (*make_fname_decl) (tree, int);
 878
 879 extern tree identifier_global_value (tree);
 880 extern void record_builtin_type (enum rid, const char *, tree);
 881 extern tree build_void_list_node (void);
 882 extern void start_fname_decls (void);
 883 extern void finish_fname_decls (void);
 884 extern const char *fname_as_string (int);
 885 extern tree fname_decl (unsigned, tree);
 886
 887 extern void check_function_arguments (tree, tree);
 888 extern void check_function_arguments_recurse (void (*)
 889                                               (void *, tree,
 890                                                unsigned HOST_WIDE_INT),
 891                                               void *, tree,
 892                                               unsigned HOST_WIDE_INT);
 893 extern void check_function_format (int *, tree, tree);
 894 extern void set_Wformat (int);
 895 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 896 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 897 extern void c_common_insert_default_attributes (tree);
 898 extern int c_common_handle_option (size_t code, const char *arg, int value);
 899 extern bool c_common_missing_argument (const char *opt, size_t code);
 900 extern tree c_common_type_for_mode (enum machine_mode, int);
 901 extern tree c_common_type_for_size (unsigned int, int);
 902 extern tree c_common_unsigned_type (tree);
 903 extern tree c_common_signed_type (tree);
 904 extern tree c_common_signed_or_unsigned_type (int, tree);
 905 extern tree c_common_truthvalue_conversion (tree);
 906 extern void c_apply_type_quals_to_decl (int, tree);
 907 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
 908 extern tree c_alignof_expr (tree);
 909 /* Print an error message for invalid operands to arith operation CODE.
 910    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 911 extern void binary_op_error (enum tree_code);
 912 #define my_friendly_assert(EXP, N) (void) \
 913  (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
 914
 915 extern tree c_expand_expr_stmt (tree);
 916 extern void c_expand_start_cond (tree, int, tree);
 917 extern void c_finish_then (void);
 918 extern void c_expand_start_else (void);
 919 extern void c_finish_else (void);
 920 extern void c_expand_end_cond (void);
 921 /* Validate the expression after `case' and apply default promotions.  */
 922 extern tree check_case_value (tree);
 923 extern tree fix_string_type (tree);
 924 struct varray_head_tag;
 925 extern void constant_expression_warning (tree);
 926 extern tree convert_and_check (tree, tree);
 927 extern void overflow_warning (tree);
 928 extern void unsigned_conversion_warning (tree, tree);
 929
 930 /* Read the rest of the current #-directive line.  */
 931 extern char *get_directive_line (void);
 932 #define GET_DIRECTIVE_LINE() get_directive_line ()
 933 #define c_sizeof(T)  c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
 934 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
 935
 936 /* Subroutine of build_binary_op, used for comparison operations.
 937    See if the operands have both been converted from subword integer types
 938    and, if so, perhaps change them both back to their original type.  */
 939 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 940
 941 extern tree pointer_int_sum (enum tree_code, tree, tree);
 942 extern unsigned int min_precision (tree, int);
 943
 944 /* Add qualifiers to a type, in the fashion for C.  */
 945 extern tree c_build_qualified_type (tree, int);
 946
 947 /* Build tree nodes and builtin functions common to both C and C++ language
 948    frontends.  */
 949 extern void c_common_nodes_and_builtins (void);
 950
 951 extern void disable_builtin_function (const char *);
 952
 953 extern tree build_va_arg (tree, tree);
 954
 955 extern unsigned int c_common_init_options (unsigned int, const char **);
 956 extern bool c_common_post_options (const char **);
 957 extern bool c_common_init (void);
 958 extern void c_common_finish (void);
 959 extern void c_common_parse_file (int);
 960 extern HOST_WIDE_INT c_common_get_alias_set (tree);
 961 extern bool c_promoting_integer_type_p (tree);
 962 extern int self_promoting_args_p (tree);
 963 extern tree strip_array_types (tree);
 964
 965 /* This function resets the parsers' state in preparation for parsing
 966    a new file.  */
 967 extern void c_reset_state (void);
 968 /* This is the basic parsing function.  */
 969 extern void c_parse_file (void);
 970 /* This is misnamed, it actually performs end-of-compilation processing.  */
 971 extern void finish_file (void);
 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 #define c_common_stmt_codes                             \
1155    CLEANUP_STMT,        EXPR_STMT,      COMPOUND_STMT,  \
1156    DECL_STMT,           IF_STMT,        FOR_STMT,       \
1157    WHILE_STMT,          DO_STMT,        RETURN_STMT,    \
1158    BREAK_STMT,          CONTINUE_STMT,  SCOPE_STMT,     \
1159    SWITCH_STMT,         GOTO_STMT,      LABEL_STMT,     \
1160    ASM_STMT,            FILE_STMT,      CASE_LABEL
1161
1162 /* TRUE if a code represents a statement.  The front end init
1163    langhook should take care of initialization of this array.  */
1164 extern bool statement_code_p[MAX_TREE_CODES];
1165
1166 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1167
1168 #define INIT_STATEMENT_CODES(STMT_CODES)                        \
1169   do {                                                          \
1170     unsigned int i;                                             \
1171     memset (&statement_code_p, 0, sizeof (statement_code_p));   \
1172     for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++)               \
1173       statement_code_p[STMT_CODES[i]] = true;                   \
1174   } while (0)
1175
1176 extern void genrtl_do_pushlevel (void);
1177 extern void genrtl_goto_stmt (tree);
1178 extern void genrtl_expr_stmt (tree);
1179 extern void genrtl_expr_stmt_value (tree, int, int);
1180 extern void genrtl_decl_stmt (tree);
1181 extern void genrtl_if_stmt (tree);
1182 extern void genrtl_while_stmt (tree);
1183 extern void genrtl_do_stmt (tree);
1184 extern void genrtl_return_stmt (tree);
1185 extern void genrtl_for_stmt (tree);
1186 extern void genrtl_break_stmt (void);
1187 extern void genrtl_continue_stmt (void);
1188 extern void genrtl_scope_stmt (tree);
1189 extern void genrtl_switch_stmt (tree);
1190 extern void genrtl_case_label (tree);
1191 extern void genrtl_compound_stmt (tree);
1192 extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
1193 extern void genrtl_cleanup_stmt (tree);
1194 extern int stmts_are_full_exprs_p (void);
1195 extern int anon_aggr_type_p (tree);
1196
1197 /* For a VAR_DECL that is an anonymous union, these are the various
1198    sub-variables that make up the anonymous union.  */
1199 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1200
1201 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
1202 #define DECL_C_BIT_FIELD(NODE) \
1203   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1204 #define SET_DECL_C_BIT_FIELD(NODE) \
1205   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1206 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1207   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1208
1209 /* In a VAR_DECL, nonzero if the decl is a register variable with
1210    an explicit asm specification.  */
1211 #define DECL_C_HARD_REGISTER(DECL)  DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1212
1213 extern void emit_local_var (tree);
1214 extern void make_rtl_for_local_static (tree);
1215 extern tree expand_cond (tree);
1216 extern tree c_expand_return (tree);
1217 extern tree do_case (tree, tree);
1218 extern tree build_stmt (enum tree_code, ...);
1219 extern tree build_case_label (tree, tree, tree);
1220 extern tree build_continue_stmt (void);
1221 extern tree build_break_stmt (void);
1222 extern tree build_return_stmt (tree);
1223
1224 #define COMPOUND_STMT_NO_SCOPE(NODE)    TREE_LANG_FLAG_0 (NODE)
1225
1226 /* Used by the C++ frontend to mark the block around the member
1227    initializers and cleanups.  */
1228 #define COMPOUND_STMT_BODY_BLOCK(NODE)  TREE_LANG_FLAG_3 (NODE)
1229
1230 extern void c_expand_asm_operands (tree, tree, tree, tree, int, const char *, int);
1231
1232 /* These functions must be defined by each front-end which implements
1233    a variant of the C language.  They are used in c-common.c.  */
1234
1235 extern tree build_unary_op (enum tree_code, tree, int);
1236 extern tree build_binary_op (enum tree_code, tree, tree, int);
1237 extern int lvalue_p (tree);
1238 extern tree default_conversion (tree);
1239
1240 /* Given two integer or real types, return the type for their sum.
1241    Given two compatible ANSI C types, returns the merged type.  */
1242
1243 extern tree common_type (tree, tree);
1244
1245 extern tree expand_tree_builtin (tree, tree, tree);
1246
1247 extern tree decl_constant_value (tree);
1248
1249 /* Handle increment and decrement of boolean types.  */
1250 extern tree boolean_increment (enum tree_code, tree);
1251
1252 /* Hook currently used only by the C++ front end to reset internal state
1253    after entering or leaving a header file.  */
1254 extern void extract_interface_info (void);
1255
1256 extern int case_compare (splay_tree_key, splay_tree_key);
1257
1258 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1259
1260 extern tree build_function_call (tree, tree);
1261
1262 extern tree finish_label_address_expr (tree);
1263
1264 /* Same function prototype, but the C and C++ front ends have
1265    different implementations.  Used in c-common.c.  */
1266 extern tree lookup_label (tree);
1267
1268 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int);
1269
1270 extern int c_safe_from_p (rtx, tree);
1271
1272 extern int c_staticp (tree);
1273
1274 extern int c_common_unsafe_for_reeval (tree);
1275
1276 extern void init_c_lex (void);
1277
1278 extern void c_cpp_builtins (cpp_reader *);
1279
1280 /* Positive if an implicit `extern "C"' scope has just been entered;
1281    negative if such a scope has just been exited.  */
1282 extern int pending_lang_change;
1283
1284 /* Information recorded about each file examined during compilation.  */
1285
1286 struct c_fileinfo
1287 {
1288   int time;     /* Time spent in the file.  */
1289   short interface_only;         /* Flags - used only by C++ */
1290   short interface_unknown;
1291 };
1292
1293 struct c_fileinfo *get_fileinfo (const char *);
1294 extern void dump_time_statistics (void);
1295
1296 extern bool c_dump_tree (void *, tree);
1297
1298 extern void pch_init (void);
1299 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1300 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1301                                const char *orig);
1302 extern void c_common_write_pch (void);
1303 extern void c_common_no_more_pch (void);
1304 extern void builtin_define_with_value (const char *, const char *, int);
1305 extern void c_stddef_cpp_builtins (void);
1306 extern void fe_file_change (const struct line_map *);
1307 extern int c_estimate_num_insns (tree decl);
1308
1309 /* In c-ppoutput.c  */
1310 extern void init_pp_output (FILE *);
1311 extern void preprocess_file (cpp_reader *);
1312 extern void pp_file_change (const struct line_map *);
1313
1314 #endif /* ! GCC_C_COMMON_H */