gcc/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
   3    1999, 2000 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* Usage of TREE_LANG_FLAG_?:
  23    0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
  24       TREE_NEGATED_INT (in INTEGER_CST).
  25       IDENTIFIER_MARKED (used by search routines).
  26       SCOPE_BEGIN_P (in SCOPE_STMT)
  27       DECL_PRETTY_FUNCTION_P (in VAR_DECL)
  28       NEW_FOR_SCOPE_P (in FOR_STMT)
  29    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  30       STMT_IS_FULL_EXPR_P (in _STMT)
  31    2: STMT_LINENO_FOR_FN_P (in _STMT)
  32    3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
  33    4: SCOPE_PARTIAL_P (in SCOPE_STMT)
  34 */
  35
  36 /* Reserved identifiers.  */
  37
  38 enum rid
  39 {
  40   RID_UNUSED,
  41   RID_INT,
  42   RID_CHAR,
  43   RID_FLOAT,
  44   RID_DOUBLE,
  45   RID_VOID,
  46   RID_UNUSED1,
  47
  48   /* The first seven are in the order of most frequently used,
  49      as emiprically determined.  */
  50   RID_FIRST_MODIFIER,
  51   RID_EXTERN = RID_FIRST_MODIFIER,
  52   RID_CONST,
  53   RID_LONG,
  54   RID_TYPEDEF,
  55   RID_UNSIGNED,
  56   RID_SHORT,
  57   RID_INLINE,
  58   RID_AUTO,
  59   RID_STATIC,
  60   RID_REGISTER,
  61   RID_SIGNED,
  62   RID_RESTRICT,
  63   RID_VOLATILE,
  64   RID_BOUNDED,
  65   RID_UNBOUNDED,
  66   RID_NOALIAS,
  67   RID_ITERATOR,
  68   RID_COMPLEX,
  69
  70   RID_IN,
  71   RID_OUT,
  72   RID_INOUT,
  73   RID_BYCOPY,
  74   RID_BYREF,
  75   RID_ONEWAY,
  76   RID_ID,
  77
  78   RID_MAX
  79 };
  80
  81 #define NORID RID_UNUSED
  82
  83 /* The elements of `ridpointers' are identifier nodes for the reserved
  84    type names and storage classes.  It is indexed by a RID_... value.  */
  85 extern tree *ridpointers;
  86
  87 /* Standard named or nameless data types of the C compiler.  */
  88
  89 enum c_tree_index
  90 {
  91     CTI_WCHAR_TYPE,
  92     CTI_SIGNED_WCHAR_TYPE,
  93     CTI_UNSIGNED_WCHAR_TYPE,
  94     CTI_WINT_TYPE,
  95     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
  96     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
  97     CTI_WIDEST_INT_LIT_TYPE,
  98     CTI_WIDEST_UINT_LIT_TYPE,
  99
 100     CTI_CHAR_ARRAY_TYPE,
 101     CTI_WCHAR_ARRAY_TYPE,
 102     CTI_INT_ARRAY_TYPE,
 103     CTI_STRING_TYPE,
 104     CTI_CONST_STRING_TYPE,
 105
 106     CTI_BOOLEAN_TYPE,
 107     CTI_BOOLEAN_TRUE,
 108     CTI_BOOLEAN_FALSE,
 109     CTI_DEFAULT_FUNCTION_TYPE,
 110     CTI_VOID_LIST,
 111
 112     CTI_VOID_FTYPE,
 113     CTI_VOID_FTYPE_PTR,
 114     CTI_INT_FTYPE_INT,
 115     CTI_PTR_FTYPE_SIZETYPE,
 116
 117     CTI_G77_INTEGER_TYPE,
 118     CTI_G77_UINTEGER_TYPE,
 119     CTI_G77_LONGINT_TYPE,
 120     CTI_G77_ULONGINT_TYPE,
 121
 122     CTI_MAX
 123 };
 124
 125 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 126 #define signed_wchar_type_node          c_global_trees[CTI_SIGNED_WCHAR_TYPE]
 127 #define unsigned_wchar_type_node        c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
 128 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 129 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 130 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 131 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 132 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 133
 134 #define boolean_type_node               c_global_trees[CTI_BOOLEAN_TYPE]
 135 #define boolean_true_node               c_global_trees[CTI_BOOLEAN_TRUE]
 136 #define boolean_false_node              c_global_trees[CTI_BOOLEAN_FALSE]
 137
 138 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 139 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 140 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 141 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 142 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 143
 144 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 145 #define void_list_node                  c_global_trees[CTI_VOID_LIST]
 146 #define void_ftype                      c_global_trees[CTI_VOID_FTYPE]
 147 #define void_ftype_ptr                  c_global_trees[CTI_VOID_FTYPE_PTR]
 148 #define int_ftype_int                   c_global_trees[CTI_INT_FTYPE_INT]
 149 #define ptr_ftype_sizetype              c_global_trees[CTI_PTR_FTYPE_SIZETYPE]
 150
 151 /* g77 integer types, which which must be kept in sync with f/com.h */
 152 #define g77_integer_type_node           c_global_trees[CTI_G77_INTEGER_TYPE]
 153 #define g77_uinteger_type_node          c_global_trees[CTI_G77_UINTEGER_TYPE]
 154 #define g77_longint_type_node           c_global_trees[CTI_G77_LONGINT_TYPE]
 155 #define g77_ulongint_type_node          c_global_trees[CTI_G77_ULONGINT_TYPE]
 156
 157 extern tree c_global_trees[CTI_MAX];
 158
 159 typedef enum c_language_kind
 160 {
 161   clk_c,           /* A dialect of C: K&R C, ANSI/ISO C89, C2000,
 162                        etc. */
 163   clk_cplusplus,   /* ANSI/ISO C++ */
 164   clk_objective_c  /* Objective C */
 165 }
 166 c_language_kind;
 167
 168 /* The variant of the C language being processed.  Each C language
 169    front-end defines this variable.  */
 170
 171 extern c_language_kind c_language;
 172
 173 /* Nonzero means give string constants the type `const char *', rather
 174    than `char *'.  */
 175
 176 extern int flag_const_strings;
 177
 178 /* Warn about *printf or *scanf format/argument anomalies. */
 179
 180 extern int warn_format;
 181
 182 /* Nonzero means do some things the same way PCC does.  */
 183
 184 extern int flag_traditional;
 185
 186 /* Nonzero means enable C89 Amendment 1 features, other than digraphs.  */
 187
 188 extern int flag_isoc94;
 189
 190 /* Nonzero means use the ISO C99 dialect of C.  */
 191
 192 extern int flag_isoc99;
 193
 194 /* Nonzero means accept digraphs.  */
 195
 196 extern int flag_digraphs;
 197
 198 /* Nonzero means environment is hosted (i.e., not freestanding) */
 199
 200 extern int flag_hosted;
 201
 202 /* Nonzero means add default format_arg attributes for functions not
 203    in ISO C.  */
 204
 205 extern int flag_noniso_default_format_attributes;
 206
 207 /* Nonzero means warn about suggesting putting in ()'s.  */
 208
 209 extern int warn_parentheses;
 210
 211 /* Warn if a type conversion is done that might have confusing results.  */
 212
 213 extern int warn_conversion;
 214
 215 /* C types are partitioned into three subsets: object, function, and
 216    incomplete types.  */
 217 #define C_TYPE_OBJECT_P(type) \
 218   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 219
 220 #define C_TYPE_INCOMPLETE_P(type) \
 221   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 222
 223 #define C_TYPE_FUNCTION_P(type) \
 224   (TREE_CODE (type) == FUNCTION_TYPE)
 225
 226 /* For convenience we define a single macro to identify the class of
 227    object or incomplete types.  */
 228 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 229   (!C_TYPE_FUNCTION_P (type))
 230
 231 /* Record in each node resulting from a binary operator
 232    what operator was specified for it.  */
 233 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
 234
 235 /* Pointer to function to generate the VAR_DECL for __FUNCTION__ etc.
 236    ID is the identifier to use, NAME is the string.
 237    TYPE_DEP indicates whether it depends on type of the function or not
 238    (i.e. __PRETTY_FUNCTION__).  */
 239
 240 extern tree (*make_fname_decl)                  PARAMS ((tree, const char *, int));
 241
 242 extern void declare_function_name               PARAMS ((void));
 243 extern void decl_attributes                     PARAMS ((tree, tree, tree));
 244 extern void init_function_format_info           PARAMS ((void));
 245 extern void check_function_format               PARAMS ((tree, tree, tree));
 246 extern void c_apply_type_quals_to_decl          PARAMS ((int, tree));
 247 /* Print an error message for invalid operands to arith operation CODE.
 248    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 249 extern void binary_op_error                     PARAMS ((enum tree_code));
 250 extern void c_expand_expr_stmt                  PARAMS ((tree));
 251 extern void c_expand_start_cond                 PARAMS ((tree, int, int));
 252 extern void c_expand_start_else                 PARAMS ((void));
 253 extern void c_expand_end_cond                   PARAMS ((void));
 254 /* Validate the expression after `case' and apply default promotions.  */
 255 extern tree check_case_value                    PARAMS ((tree));
 256 /* Concatenate a list of STRING_CST nodes into one STRING_CST.  */
 257 extern tree combine_strings                     PARAMS ((tree));
 258 extern void constant_expression_warning         PARAMS ((tree));
 259 extern tree convert_and_check                   PARAMS ((tree, tree));
 260 extern void overflow_warning                    PARAMS ((tree));
 261 extern void unsigned_conversion_warning         PARAMS ((tree, tree));
 262
 263 /* Read the rest of the current #-directive line.  */
 264 #if USE_CPPLIB
 265 extern char *get_directive_line                 PARAMS ((void));
 266 #define GET_DIRECTIVE_LINE() get_directive_line ()
 267 #else
 268 extern char *get_directive_line                 PARAMS ((FILE *));
 269 #define GET_DIRECTIVE_LINE() get_directive_line (finput)
 270 #endif
 271
 272 /* Subroutine of build_binary_op, used for comparison operations.
 273    See if the operands have both been converted from subword integer types
 274    and, if so, perhaps change them both back to their original type.  */
 275 extern tree shorten_compare                     PARAMS ((tree *, tree *, tree *, enum tree_code *));
 276 /* Prepare expr to be an argument of a TRUTH_NOT_EXPR,
 277    or validate its data type for an `if' or `while' statement or ?..: exp. */
 278 extern tree truthvalue_conversion               PARAMS ((tree));
 279 extern tree type_for_mode                       PARAMS ((enum machine_mode, int));
 280 extern tree type_for_size                       PARAMS ((unsigned, int));
 281
 282 extern unsigned int min_precision               PARAMS ((tree, int));
 283
 284 /* Add qualifiers to a type, in the fashion for C.  */
 285 extern tree c_build_qualified_type              PARAMS ((tree, int));
 286
 287 /* Build tree nodes and builtin functions common to both C and C++ language
 288    frontends.  */
 289 extern void c_common_nodes_and_builtins         PARAMS ((int, int, int));
 290
 291 extern tree build_va_arg                        PARAMS ((tree, tree));
 292
 293 /* Nonzero if the type T promotes to itself.
 294    ANSI C states explicitly the list of types that promote;
 295    in particular, short promotes to int even if they have the same width.  */
 296 #define C_PROMOTING_INTEGER_TYPE_P(t)                           \
 297   (TREE_CODE ((t)) == INTEGER_TYPE                              \
 298    && (TYPE_MAIN_VARIANT (t) == char_type_node                  \
 299        || TYPE_MAIN_VARIANT (t) == signed_char_type_node        \
 300        || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node      \
 301        || TYPE_MAIN_VARIANT (t) == short_integer_type_node      \
 302        || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node))
 303
 304 extern int self_promoting_args_p                PARAMS ((tree));
 305 extern tree simple_type_promotes_to             PARAMS ((tree));
 306
 307 /* These macros provide convenient access to the various _STMT nodes
 308    created when parsing template declarations.  */
 309
 310 /* IF_STMT accessors. These give access to the condtion of the if
 311    statement, the then block of the if statement, and the else block
 312    of the if stsatement if it exists. */
 313 #define IF_COND(NODE)           TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
 314 #define THEN_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
 315 #define ELSE_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
 316
 317 /* WHILE_STMT accessors. These give access to the condtion of the
 318    while statement and the body of the while statement, respectively. */
 319 #define WHILE_COND(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
 320 #define WHILE_BODY(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
 321
 322 /* DO_STMT accessors. These give access to the condition of the do
 323    statement and the body of the do statement, respectively. */
 324 #define DO_COND(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
 325 #define DO_BODY(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
 326
 327 /* RETURN_STMT accessor. This gives the expression associated with a
 328    return statement. */
 329 #define RETURN_EXPR(NODE)       TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
 330
 331 /* EXPR_STMT accessor. This gives the expression associated with an
 332    expression statement. */
 333 #define EXPR_STMT_EXPR(NODE)    TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
 334
 335 /* FOR_STMT accessors. These give access to the init statement,
 336    condition, update expression, and body of the for statement,
 337    respectively. */
 338 #define FOR_INIT_STMT(NODE)     TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
 339 #define FOR_COND(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
 340 #define FOR_EXPR(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
 341 #define FOR_BODY(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
 342
 343 /* SWITCH_STMT accessors. These give access to the condition and body
 344    of the switch statement, respectively. */
 345 #define SWITCH_COND(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
 346 #define SWITCH_BODY(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
 347
 348 /* CASE_LABEL accessors. These give access to the high and low values
 349    of a case label, respectively. */
 350 #define CASE_LOW(NODE)          TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
 351 #define CASE_HIGH(NODE)         TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
 352
 353 /* GOTO_STMT accessor. This gives access to the label associated with
 354    a goto statement. */
 355 #define GOTO_DESTINATION(NODE)  TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
 356
 357 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
 358    statements assocated with a compound statement. The result is the
 359    first statement in the list. Succeeding nodes can be acccessed by
 360    calling TREE_CHAIN on a node in the list. */
 361 #define COMPOUND_BODY(NODE)     TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
 362
 363 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
 364    instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
 365    ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
 366    statement. */
 367 #define ASM_CV_QUAL(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
 368 #define ASM_STRING(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
 369 #define ASM_OUTPUTS(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
 370 #define ASM_INPUTS(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
 371 #define ASM_CLOBBERS(NODE)      TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
 372
 373 /* DECL_STMT accessor. This gives access to the DECL associated with
 374    the given declaration statement. */
 375 #define DECL_STMT_DECL(NODE)    TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
 376
 377 /* STMT_EXPR accessor. */
 378 #define STMT_EXPR_STMT(NODE)    TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
 379
 380 /* LABEL_STMT accessor. This gives access to the label associated with
 381    the given label statement. */
 382 #define LABEL_STMT_LABEL(NODE)  TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
 383
 384 /* Nonzero if this SCOPE_STMT is for the beginning of a scope.  */
 385 #define SCOPE_BEGIN_P(NODE) \
 386   (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
 387
 388 /* Nonzero if this SCOPE_STMT is for the end of a scope.  */
 389 #define SCOPE_END_P(NODE) \
 390   (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
 391
 392 /* The BLOCK containing the declarations contained in this scope.  */
 393 #define SCOPE_STMT_BLOCK(NODE) \
 394   (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
 395
 396 /* Nonzero for a SCOPE_STMT if there were no variables in this scope.  */
 397 #define SCOPE_NULLIFIED_P(NODE) \
 398   (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
 399
 400 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
 401    which should be treated as non-existant from the point of view of
 402    running cleanup actions.  */
 403 #define SCOPE_NO_CLEANUPS_P(NODE) \
 404   (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
 405
 406 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
 407    For example, in:
 408
 409      S s;
 410      l:
 411      S s2;
 412      goto l;
 413
 414    there is (implicitly) a new scope after `l', even though there are
 415    no curly braces.  In particular, when we hit the goto, we must
 416    destroy s2 and then re-construct it.  For the implicit scope,
 417    SCOPE_PARTIAL_P will be set.  */
 418 #define SCOPE_PARTIAL_P(NODE) \
 419   (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
 420
 421 /* Nonzero for an ASM_STMT if the assembly statement is volatile.  */
 422 #define ASM_VOLATILE_P(NODE)                    \
 423   (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
 424
 425 /* The line-number at which a statement began.  But if
 426    STMT_LINENO_FOR_FN_P does holds, then this macro gives the
 427    line number for the end of the current function instead.  */
 428 #define STMT_LINENO(NODE)                       \
 429   (TREE_COMPLEXITY ((NODE)))
 430
 431 /* If non-zero, the STMT_LINENO for NODE is the line at which the
 432    function ended.  */
 433 #define STMT_LINENO_FOR_FN_P(NODE)              \
 434   (TREE_LANG_FLAG_2 ((NODE)))
 435
 436 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 437    initialization variables. */
 438 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
 439
 440 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
 441
 442 enum c_tree_code {
 443   C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
 444 #include "c-common.def"
 445   LAST_C_TREE_CODE
 446 };
 447
 448 #undef DEFTREECODE
 449
 450 extern void add_c_tree_codes                    PARAMS ((void));
 451 extern void genrtl_do_pushlevel                 PARAMS ((void));
 452 extern void genrtl_clear_out_block              PARAMS ((void));
 453 extern void genrtl_goto_stmt                    PARAMS ((tree));
 454 extern void genrtl_expr_stmt                    PARAMS ((tree));
 455 extern void genrtl_decl_stmt                    PARAMS ((tree));
 456 extern void genrtl_if_stmt                      PARAMS ((tree));
 457 extern void genrtl_while_stmt                   PARAMS ((tree));
 458 extern void genrtl_do_stmt                      PARAMS ((tree));
 459 extern void genrtl_return_stmt                  PARAMS ((tree));
 460 extern void genrtl_for_stmt                     PARAMS ((tree));
 461 extern void genrtl_break_stmt                   PARAMS ((void));
 462 extern void genrtl_continue_stmt                PARAMS ((void));
 463 extern void genrtl_scope_stmt                   PARAMS ((tree));
 464 extern void genrtl_switch_stmt                  PARAMS ((tree));
 465 extern void genrtl_case_label                   PARAMS ((tree, tree));
 466 extern void genrtl_compound_stmt                PARAMS ((tree));
 467 extern void genrtl_asm_stmt                     PARAMS ((tree, tree,
 468                                                          tree, tree,
 469                                                          tree));
 470 extern void genrtl_decl_cleanup                 PARAMS ((tree, tree));
 471 extern int stmts_are_full_exprs_p               PARAMS ((void));
 472 typedef void (*expand_expr_stmt_fn)             PARAMS ((tree));
 473 extern expand_expr_stmt_fn lang_expand_expr_stmt;
 474 extern int anon_aggr_type_p                     PARAMS ((tree));
 475
 476 /* For a VAR_DECL that is an anonymous union, these are the various
 477    sub-variables that make up the anonymous union.  */
 478 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
 479
 480 extern void emit_local_var                      PARAMS ((tree));
 481 extern void make_rtl_for_local_static           PARAMS ((tree));
 482 extern tree expand_cond                         PARAMS ((tree));
 483 extern tree expand_stmt                         PARAMS ((tree));
 484 extern tree lang_expand_stmt                    PARAMS ((tree));
 485 extern void c_expand_return                     PARAMS ((tree));
 486 extern tree c_expand_start_case                 PARAMS ((tree));
 487 extern void do_case                             PARAMS ((tree, tree));
 488 extern tree build_stmt                          PARAMS ((enum tree_code, ...));
 489 extern tree build_case_label                    PARAMS ((tree, tree));
 490 extern tree build_continue_stmt                 PARAMS ((void));
 491 extern tree build_break_stmt                    PARAMS ((void));
 492 extern tree build_return_stmt                   PARAMS ((tree));
 493
 494 #define COMPOUND_STMT_NO_SCOPE(NODE)    TREE_LANG_FLAG_0 (NODE)
 495
 496 extern void c_expand_asm_operands               PARAMS ((tree, tree, tree, tree, int, const char *, int));
 497 extern int current_function_name_declared       PARAMS ((void));
 498 extern void set_current_function_name_declared  PARAMS ((int));
 499
 500 /* These functions must be defined by each front-end which implements
 501    a variant of the C language.  They are used in c-common.c.  */
 502
 503 extern tree build_unary_op                      PARAMS ((enum tree_code,
 504                                                          tree, int));
 505 extern tree build_binary_op                     PARAMS ((enum tree_code,
 506                                                          tree, tree, int));
 507 extern int lvalue_p                             PARAMS ((tree));
 508 extern tree default_conversion                  PARAMS ((tree));
 509
 510 /* Given two integer or real types, return the type for their sum.
 511    Given two compatible ANSI C types, returns the merged type.  */
 512
 513 extern tree common_type                         PARAMS ((tree, tree));