1 /* Definitions for C parsing and type checking. 2 Copyright (C) 1987-2013 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef GCC_C_TREE_H 21 #define GCC_C_TREE_H 22 23 #include "c-family/c-common.h" 24 #include "diagnostic.h" 25 26 /* struct lang_identifier is private to c-decl.c, but langhooks.c needs to 27 know how big it is. This is sanity-checked in c-decl.c. */ 28 #define C_SIZEOF_STRUCT_LANG_IDENTIFIER \ 29 (sizeof (struct c_common_identifier) + 3 * sizeof (void *)) 30 31 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */ 32 #define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE) 33 34 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */ 35 #define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE) 36 37 /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE 38 nonzero if the definition of the type has already started. */ 39 #define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE) 40 41 /* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable 42 declarations whose type would be completed by completing that type. */ 43 #define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE) 44 45 /* In an IDENTIFIER_NODE, nonzero if this identifier is actually a 46 keyword. C_RID_CODE (node) is then the RID_* value of the keyword, 47 and C_RID_YYCODE is the token number wanted by Yacc. */ 48 #define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID) 49 50 /* Record whether a type or decl was written with nonconstant size. 51 Note that TYPE_SIZE may have simplified to a constant. */ 52 #define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE) 53 #define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE) 54 55 /* Record whether a type is defined inside a struct or union type. 56 This is used for -Wc++-compat. */ 57 #define C_TYPE_DEFINED_IN_STRUCT(TYPE) TYPE_LANG_FLAG_2 (TYPE) 58 59 /* Record whether a typedef for type `int' was actually `signed int'. */ 60 #define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP) 61 62 /* For a FUNCTION_DECL, nonzero if it was defined without an explicit 63 return type. */ 64 #define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP) 65 66 /* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */ 67 #define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP) 68 69 /* For FUNCTION_DECLs, evaluates true if the decl is built-in but has 70 been declared. */ 71 #define C_DECL_DECLARED_BUILTIN(EXP) \ 72 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP)) 73 74 /* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a 75 built-in prototype and does not have a non-built-in prototype. */ 76 #define C_DECL_BUILTIN_PROTOTYPE(EXP) \ 77 DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP)) 78 79 /* Record whether a decl was declared register. This is strictly a 80 front-end flag, whereas DECL_REGISTER is used for code generation; 81 they may differ for structures with volatile fields. */ 82 #define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP) 83 84 /* Record whether a decl was used in an expression anywhere except an 85 unevaluated operand of sizeof / typeof / alignof. This is only 86 used for functions declared static but not defined, though outside 87 sizeof and typeof it is set for other function decls as well. */ 88 #define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP)) 89 90 /* Record whether a variable has been declared threadprivate by 91 #pragma omp threadprivate. */ 92 #define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL)) 93 94 /* Nonzero for a decl which either doesn't exist or isn't a prototype. 95 N.B. Could be simplified if all built-in decls had complete prototypes 96 (but this is presently difficult because some of them need FILE*). */ 97 #define C_DECL_ISNT_PROTOTYPE(EXP) \ 98 (EXP == 0 \ 99 || (!prototype_p (TREE_TYPE (EXP)) \ 100 && !DECL_BUILT_IN (EXP))) 101 102 /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as 103 TYPE_ARG_TYPES for functions with prototypes, but created for functions 104 without prototypes. */ 105 #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE) 106 107 /* For a CONSTRUCTOR, whether some initializer contains a 108 subexpression meaning it is not a constant expression. */ 109 #define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR)) 110 111 /* Record parser information about an expression that is irrelevant 112 for code generation alongside a tree representing its value. */ 113 struct c_expr 114 { 115 /* The value of the expression. */ 116 tree value; 117 /* Record the original unary/binary operator of an expression, which may 118 have been changed by fold, STRING_CST for unparenthesized string 119 constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls 120 (even if parenthesized), for subexpressions, and for non-constant 121 initializers, or ERROR_MARK for other expressions (including 122 parenthesized expressions). */ 123 enum tree_code original_code; 124 /* If not NULL, the original type of an expression. This will 125 differ from the type of the value field for an enum constant. 126 The type of an enum constant is a plain integer type, but this 127 field will be the enum type. */ 128 tree original_type; 129 }; 130 131 /* Type alias for struct c_expr. This allows to use the structure 132 inside the VEC types. */ 133 typedef struct c_expr c_expr_t; 134 135 /* A varray of c_expr_t. */ 136 137 /* Append a new c_expr_t element to V. */ 138 #define C_EXPR_APPEND(V, ELEM) \ 139 do { \ 140 c_expr_t __elem = (ELEM); \ 141 vec_safe_push (V, __elem); \ 142 } while (0) 143 144 /* A kind of type specifier. Note that this information is currently 145 only used to distinguish tag definitions, tag references and typeof 146 uses. */ 147 enum c_typespec_kind { 148 /* No typespec. This appears only in struct c_declspec. */ 149 ctsk_none, 150 /* A reserved keyword type specifier. */ 151 ctsk_resword, 152 /* A reference to a tag, previously declared, such as "struct foo". 153 This includes where the previous declaration was as a different 154 kind of tag, in which case this is only valid if shadowing that 155 tag in an inner scope. */ 156 ctsk_tagref, 157 /* A reference to a tag, not previously declared in a visible 158 scope. */ 159 ctsk_tagfirstref, 160 /* A definition of a tag such as "struct foo { int a; }". */ 161 ctsk_tagdef, 162 /* A typedef name. */ 163 ctsk_typedef, 164 /* An ObjC-specific kind of type specifier. */ 165 ctsk_objc, 166 /* A typeof specifier. */ 167 ctsk_typeof 168 }; 169 170 /* A type specifier: this structure is created in the parser and 171 passed to declspecs_add_type only. */ 172 struct c_typespec { 173 /* What kind of type specifier this is. */ 174 enum c_typespec_kind kind; 175 /* Whether the expression has operands suitable for use in constant 176 expressions. */ 177 bool expr_const_operands; 178 /* The specifier itself. */ 179 tree spec; 180 /* An expression to be evaluated before the type specifier, in the 181 case of typeof specifiers, or NULL otherwise or if no such 182 expression is required for a particular typeof specifier. In 183 particular, when typeof is applied to an expression of variably 184 modified type, that expression must be evaluated in order to 185 determine array sizes that form part of the type, but the 186 expression itself (as opposed to the array sizes) forms no part 187 of the type and so needs to be recorded separately. */ 188 tree expr; 189 }; 190 191 /* A storage class specifier. */ 192 enum c_storage_class { 193 csc_none, 194 csc_auto, 195 csc_extern, 196 csc_register, 197 csc_static, 198 csc_typedef 199 }; 200 201 /* A type specifier keyword "void", "_Bool", "char", "int", "float", 202 "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum", 203 or none of these. */ 204 enum c_typespec_keyword { 205 cts_none, 206 cts_void, 207 cts_bool, 208 cts_char, 209 cts_int, 210 cts_float, 211 cts_int128, 212 cts_double, 213 cts_dfloat32, 214 cts_dfloat64, 215 cts_dfloat128, 216 cts_fract, 217 cts_accum 218 }; 219 220 /* This enum lists all the possible declarator specifiers, storage 221 class or attribute that a user can write. There is at least one 222 enumerator per possible declarator specifier in the struct 223 c_declspecs below. 224 225 It is used to index the array of declspec locations in struct 226 c_declspecs. */ 227 enum c_declspec_word { 228 cdw_typespec /* A catch-all for a typespec. */, 229 cdw_storage_class /* A catch-all for a storage class */, 230 cdw_attributes, 231 cdw_typedef, 232 cdw_explicit_signed, 233 cdw_deprecated, 234 cdw_default_int, 235 cdw_long, 236 cdw_long_long, 237 cdw_short, 238 cdw_signed, 239 cdw_unsigned, 240 cdw_complex, 241 cdw_inline, 242 cdw_noreturn, 243 cdw_thread, 244 cdw_const, 245 cdw_volatile, 246 cdw_restrict, 247 cdw_saturating, 248 cdw_alignas, 249 cdw_address_space, 250 cdw_number_of_elements /* This one must always be the last 251 enumerator. */ 252 }; 253 254 /* A sequence of declaration specifiers in C. When a new declaration 255 specifier is added, please update the enum c_declspec_word above 256 accordingly. */ 257 struct c_declspecs { 258 source_location locations[cdw_number_of_elements]; 259 /* The type specified, if a single type specifier such as a struct, 260 union or enum specifier, typedef name or typeof specifies the 261 whole type, or NULL_TREE if none or a keyword such as "void" or 262 "char" is used. Does not include qualifiers. */ 263 tree type; 264 /* Any expression to be evaluated before the type, from a typeof 265 specifier. */ 266 tree expr; 267 /* The attributes from a typedef decl. */ 268 tree decl_attr; 269 /* When parsing, the attributes. Outside the parser, this will be 270 NULL; attributes (possibly from multiple lists) will be passed 271 separately. */ 272 tree attrs; 273 /* The base-2 log of the greatest alignment required by an _Alignas 274 specifier, in bytes, or -1 if no such specifiers with nonzero 275 alignment. */ 276 int align_log; 277 /* The storage class specifier, or csc_none if none. */ 278 enum c_storage_class storage_class; 279 /* Any type specifier keyword used such as "int", not reflecting 280 modifiers such as "short", or cts_none if none. */ 281 ENUM_BITFIELD (c_typespec_keyword) typespec_word : 8; 282 /* The kind of type specifier if one has been seen, ctsk_none 283 otherwise. */ 284 ENUM_BITFIELD (c_typespec_kind) typespec_kind : 3; 285 /* Whether any expressions in typeof specifiers may appear in 286 constant expressions. */ 287 BOOL_BITFIELD expr_const_operands : 1; 288 /* Whether any declaration specifiers have been seen at all. */ 289 BOOL_BITFIELD declspecs_seen_p : 1; 290 /* Whether something other than a storage class specifier or 291 attribute has been seen. This is used to warn for the 292 obsolescent usage of storage class specifiers other than at the 293 start of the list. (Doing this properly would require function 294 specifiers to be handled separately from storage class 295 specifiers.) */ 296 BOOL_BITFIELD non_sc_seen_p : 1; 297 /* Whether the type is specified by a typedef or typeof name. */ 298 BOOL_BITFIELD typedef_p : 1; 299 /* Whether the type is explicitly "signed" or specified by a typedef 300 whose type is explicitly "signed". */ 301 BOOL_BITFIELD explicit_signed_p : 1; 302 /* Whether the specifiers include a deprecated typedef. */ 303 BOOL_BITFIELD deprecated_p : 1; 304 /* Whether the type defaulted to "int" because there were no type 305 specifiers. */ 306 BOOL_BITFIELD default_int_p : 1; 307 /* Whether "long" was specified. */ 308 BOOL_BITFIELD long_p : 1; 309 /* Whether "long" was specified more than once. */ 310 BOOL_BITFIELD long_long_p : 1; 311 /* Whether "short" was specified. */ 312 BOOL_BITFIELD short_p : 1; 313 /* Whether "signed" was specified. */ 314 BOOL_BITFIELD signed_p : 1; 315 /* Whether "unsigned" was specified. */ 316 BOOL_BITFIELD unsigned_p : 1; 317 /* Whether "complex" was specified. */ 318 BOOL_BITFIELD complex_p : 1; 319 /* Whether "inline" was specified. */ 320 BOOL_BITFIELD inline_p : 1; 321 /* Whether "_Noreturn" was speciied. */ 322 BOOL_BITFIELD noreturn_p : 1; 323 /* Whether "__thread" was specified. */ 324 BOOL_BITFIELD thread_p : 1; 325 /* Whether "const" was specified. */ 326 BOOL_BITFIELD const_p : 1; 327 /* Whether "volatile" was specified. */ 328 BOOL_BITFIELD volatile_p : 1; 329 /* Whether "restrict" was specified. */ 330 BOOL_BITFIELD restrict_p : 1; 331 /* Whether "_Sat" was specified. */ 332 BOOL_BITFIELD saturating_p : 1; 333 /* Whether any alignment specifier (even with zero alignment) was 334 specified. */ 335 BOOL_BITFIELD alignas_p : 1; 336 /* The address space that the declaration belongs to. */ 337 addr_space_t address_space; 338 }; 339 340 /* The various kinds of declarators in C. */ 341 enum c_declarator_kind { 342 /* An identifier. */ 343 cdk_id, 344 /* A function. */ 345 cdk_function, 346 /* An array. */ 347 cdk_array, 348 /* A pointer. */ 349 cdk_pointer, 350 /* Parenthesized declarator with nested attributes. */ 351 cdk_attrs 352 }; 353 354 typedef struct c_arg_tag_d { 355 /* The argument name. */ 356 tree id; 357 /* The type of the argument. */ 358 tree type; 359 } c_arg_tag; 360 361 362 /* Information about the parameters in a function declarator. */ 363 struct c_arg_info { 364 /* A list of parameter decls. */ 365 tree parms; 366 /* A list of structure, union and enum tags defined. */ 367 vec<c_arg_tag, va_gc> *tags; 368 /* A list of argument types to go in the FUNCTION_TYPE. */ 369 tree types; 370 /* A list of non-parameter decls (notably enumeration constants) 371 defined with the parameters. */ 372 tree others; 373 /* A compound expression of VLA sizes from the parameters, or NULL. 374 In a function definition, these are used to ensure that 375 side-effects in sizes of arrays converted to pointers (such as a 376 parameter int i[n++]) take place; otherwise, they are 377 ignored. */ 378 tree pending_sizes; 379 /* True when these arguments had [*]. */ 380 BOOL_BITFIELD had_vla_unspec : 1; 381 }; 382 383 /* A declarator. */ 384 struct c_declarator { 385 /* The kind of declarator. */ 386 enum c_declarator_kind kind; 387 location_t id_loc; /* Currently only set for cdk_id, cdk_array. */ 388 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */ 389 struct c_declarator *declarator; 390 union { 391 /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract 392 declarator. */ 393 tree id; 394 /* For functions. */ 395 struct c_arg_info *arg_info; 396 /* For arrays. */ 397 struct { 398 /* The array dimension, or NULL for [] and [*]. */ 399 tree dimen; 400 /* The qualifiers inside []. */ 401 int quals; 402 /* The attributes (currently ignored) inside []. */ 403 tree attrs; 404 /* Whether [static] was used. */ 405 BOOL_BITFIELD static_p : 1; 406 /* Whether [*] was used. */ 407 BOOL_BITFIELD vla_unspec_p : 1; 408 } array; 409 /* For pointers, the qualifiers on the pointer type. */ 410 int pointer_quals; 411 /* For attributes. */ 412 tree attrs; 413 } u; 414 }; 415 416 /* A type name. */ 417 struct c_type_name { 418 /* The declaration specifiers. */ 419 struct c_declspecs *specs; 420 /* The declarator. */ 421 struct c_declarator *declarator; 422 }; 423 424 /* A parameter. */ 425 struct c_parm { 426 /* The declaration specifiers, minus any prefix attributes. */ 427 struct c_declspecs *specs; 428 /* The attributes. */ 429 tree attrs; 430 /* The declarator. */ 431 struct c_declarator *declarator; 432 }; 433 434 /* Used when parsing an enum. Initialized by start_enum. */ 435 struct c_enum_contents 436 { 437 /* While defining an enum type, this is 1 plus the last enumerator 438 constant value. */ 439 tree enum_next_value; 440 441 /* Nonzero means that there was overflow computing enum_next_value. */ 442 int enum_overflow; 443 }; 444 445 /* A type of reference to a static identifier in an inline 446 function. */ 447 enum c_inline_static_type { 448 /* Identifier with internal linkage used in function that may be an 449 inline definition (i.e., file-scope static). */ 450 csi_internal, 451 /* Modifiable object with static storage duration defined in 452 function that may be an inline definition (i.e., local 453 static). */ 454 csi_modifiable 455 }; 456 457 458 /* in c-parser.c */ 459 extern void c_parse_init (void); 460 461 /* in c-aux-info.c */ 462 extern void gen_aux_info_record (tree, int, int, int); 463 464 /* in c-decl.c */ 465 struct c_spot_bindings; 466 struct c_struct_parse_info; 467 extern struct obstack parser_obstack; 468 extern tree c_break_label; 469 extern tree c_cont_label; 470 471 extern bool global_bindings_p (void); 472 extern void push_scope (void); 473 extern tree pop_scope (void); 474 extern void c_bindings_start_stmt_expr (struct c_spot_bindings *); 475 extern void c_bindings_end_stmt_expr (struct c_spot_bindings *); 476 477 extern void record_inline_static (location_t, tree, tree, 478 enum c_inline_static_type); 479 extern void c_init_decl_processing (void); 480 extern void c_print_identifier (FILE *, tree, int); 481 extern int quals_from_declspecs (const struct c_declspecs *); 482 extern struct c_declarator *build_array_declarator (location_t, tree, 483 struct c_declspecs *, 484 bool, bool); 485 extern tree build_enumerator (location_t, location_t, struct c_enum_contents *, 486 tree, tree); 487 extern tree check_for_loop_decls (location_t, bool); 488 extern void mark_forward_parm_decls (void); 489 extern void declare_parm_level (void); 490 extern void undeclared_variable (location_t, tree); 491 extern tree lookup_label_for_goto (location_t, tree); 492 extern tree declare_label (tree); 493 extern tree define_label (location_t, tree); 494 extern struct c_spot_bindings *c_get_switch_bindings (void); 495 extern void c_release_switch_bindings (struct c_spot_bindings *); 496 extern bool c_check_switch_jump_warnings (struct c_spot_bindings *, 497 location_t, location_t); 498 extern void finish_decl (tree, location_t, tree, tree, tree); 499 extern tree finish_enum (tree, tree, tree); 500 extern void finish_function (void); 501 extern tree finish_struct (location_t, tree, tree, tree, 502 struct c_struct_parse_info *); 503 extern struct c_arg_info *build_arg_info (void); 504 extern struct c_arg_info *get_parm_info (bool, tree); 505 extern tree grokfield (location_t, struct c_declarator *, 506 struct c_declspecs *, tree, tree *); 507 extern tree groktypename (struct c_type_name *, tree *, bool *); 508 extern tree grokparm (const struct c_parm *, tree *); 509 extern tree implicitly_declare (location_t, tree); 510 extern void keep_next_level (void); 511 extern void pending_xref_error (void); 512 extern void c_push_function_context (void); 513 extern void c_pop_function_context (void); 514 extern void push_parm_decl (const struct c_parm *, tree *); 515 extern struct c_declarator *set_array_declarator_inner (struct c_declarator *, 516 struct c_declarator *); 517 extern tree c_builtin_function (tree); 518 extern tree c_builtin_function_ext_scope (tree); 519 extern void shadow_tag (const struct c_declspecs *); 520 extern void shadow_tag_warned (const struct c_declspecs *, int); 521 extern tree start_enum (location_t, struct c_enum_contents *, tree); 522 extern int start_function (struct c_declspecs *, struct c_declarator *, tree); 523 extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool, 524 tree); 525 extern tree start_struct (location_t, enum tree_code, tree, 526 struct c_struct_parse_info **); 527 extern void store_parm_decls (void); 528 extern void store_parm_decls_from (struct c_arg_info *); 529 extern tree xref_tag (enum tree_code, tree); 530 extern struct c_typespec parser_xref_tag (location_t, enum tree_code, tree); 531 extern struct c_parm *build_c_parm (struct c_declspecs *, tree, 532 struct c_declarator *); 533 extern struct c_declarator *build_attrs_declarator (tree, 534 struct c_declarator *); 535 extern struct c_declarator *build_function_declarator (struct c_arg_info *, 536 struct c_declarator *); 537 extern struct c_declarator *build_id_declarator (tree); 538 extern struct c_declarator *make_pointer_declarator (struct c_declspecs *, 539 struct c_declarator *); 540 extern struct c_declspecs *build_null_declspecs (void); 541 extern struct c_declspecs *declspecs_add_qual (source_location, 542 struct c_declspecs *, tree); 543 extern struct c_declspecs *declspecs_add_type (location_t, 544 struct c_declspecs *, 545 struct c_typespec); 546 extern struct c_declspecs *declspecs_add_scspec (source_location, 547 struct c_declspecs *, tree); 548 extern struct c_declspecs *declspecs_add_attrs (source_location, 549 struct c_declspecs *, tree); 550 extern struct c_declspecs *declspecs_add_addrspace (source_location, 551 struct c_declspecs *, 552 addr_space_t); 553 extern struct c_declspecs *declspecs_add_alignas (source_location, 554 struct c_declspecs *, tree); 555 extern struct c_declspecs *finish_declspecs (struct c_declspecs *); 556 557 /* in c-objc-common.c */ 558 extern bool c_objc_common_init (void); 559 extern bool c_missing_noreturn_ok_p (tree); 560 extern bool c_warn_unused_global_decl (const_tree); 561 extern void c_initialize_diagnostics (diagnostic_context *); 562 extern bool c_vla_unspec_p (tree x, tree fn); 563 564 /* in c-typeck.c */ 565 extern int in_alignof; 566 extern int in_sizeof; 567 extern int in_typeof; 568 569 extern tree c_last_sizeof_arg; 570 571 extern struct c_switch *c_switch_stack; 572 573 extern tree c_objc_common_truthvalue_conversion (location_t, tree); 574 extern tree require_complete_type (tree); 575 extern int same_translation_unit_p (const_tree, const_tree); 576 extern int comptypes (tree, tree); 577 extern int comptypes_check_different_types (tree, tree, bool *); 578 extern bool c_vla_type_p (const_tree); 579 extern bool c_mark_addressable (tree); 580 extern void c_incomplete_type_error (const_tree, const_tree); 581 extern tree c_type_promotes_to (tree); 582 extern struct c_expr default_function_array_conversion (location_t, 583 struct c_expr); 584 extern struct c_expr default_function_array_read_conversion (location_t, 585 struct c_expr); 586 extern void mark_exp_read (tree); 587 extern tree composite_type (tree, tree); 588 extern tree build_component_ref (location_t, tree, tree); 589 extern tree build_array_ref (location_t, tree, tree); 590 extern tree build_external_ref (location_t, tree, int, tree *); 591 extern void pop_maybe_used (bool); 592 extern struct c_expr c_expr_sizeof_expr (location_t, struct c_expr); 593 extern struct c_expr c_expr_sizeof_type (location_t, struct c_type_name *); 594 extern struct c_expr parser_build_unary_op (location_t, enum tree_code, 595 struct c_expr); 596 extern struct c_expr parser_build_binary_op (location_t, 597 enum tree_code, struct c_expr, 598 struct c_expr); 599 extern tree build_conditional_expr (location_t, tree, bool, tree, tree, 600 tree, tree); 601 extern tree build_compound_expr (location_t, tree, tree); 602 extern tree c_cast_expr (location_t, struct c_type_name *, tree); 603 extern tree build_c_cast (location_t, tree, tree); 604 extern void store_init_value (location_t, tree, tree, tree); 605 extern void error_init (const char *); 606 extern void pedwarn_init (location_t, int opt, const char *); 607 extern void maybe_warn_string_init (tree, struct c_expr); 608 extern void start_init (tree, tree, int); 609 extern void finish_init (void); 610 extern void really_start_incremental_init (tree); 611 extern void push_init_level (int, struct obstack *); 612 extern struct c_expr pop_init_level (int, struct obstack *); 613 extern void set_init_index (tree, tree, struct obstack *); 614 extern void set_init_label (tree, struct obstack *); 615 extern void process_init_element (struct c_expr, bool, struct obstack *); 616 extern tree build_compound_literal (location_t, tree, tree, bool); 617 extern void check_compound_literal_type (location_t, struct c_type_name *); 618 extern tree c_start_case (location_t, location_t, tree); 619 extern void c_finish_case (tree); 620 extern tree build_asm_expr (location_t, tree, tree, tree, tree, tree, bool); 621 extern tree build_asm_stmt (tree, tree); 622 extern int c_types_compatible_p (tree, tree); 623 extern tree c_begin_compound_stmt (bool); 624 extern tree c_end_compound_stmt (location_t, tree, bool); 625 extern void c_finish_if_stmt (location_t, tree, tree, tree, bool); 626 extern void c_finish_loop (location_t, tree, tree, tree, tree, tree, bool); 627 extern tree c_begin_stmt_expr (void); 628 extern tree c_finish_stmt_expr (location_t, tree); 629 extern tree c_process_expr_stmt (location_t, tree); 630 extern tree c_finish_expr_stmt (location_t, tree); 631 extern tree c_finish_return (location_t, tree, tree); 632 extern tree c_finish_bc_stmt (location_t, tree *, bool); 633 extern tree c_finish_goto_label (location_t, tree); 634 extern tree c_finish_goto_ptr (location_t, tree); 635 extern tree c_expr_to_decl (tree, bool *, bool *); 636 extern tree c_begin_omp_parallel (void); 637 extern tree c_finish_omp_parallel (location_t, tree, tree); 638 extern tree c_begin_omp_task (void); 639 extern tree c_finish_omp_task (location_t, tree, tree); 640 extern tree c_finish_omp_clauses (tree); 641 extern tree c_build_va_arg (location_t, tree, tree); 642 extern tree c_finish_transaction (location_t, tree, int); 643 extern tree c_build_function_call_vec (location_t, tree, vec<tree, va_gc> *, 644 vec<tree, va_gc> *); 645 646 /* Set to 0 at beginning of a function definition, set to 1 if 647 a return statement that specifies a return value is seen. */ 648 649 extern int current_function_returns_value; 650 651 /* Set to 0 at beginning of a function definition, set to 1 if 652 a return statement with no argument is seen. */ 653 654 extern int current_function_returns_null; 655 656 /* Set to 0 at beginning of a function definition, set to 1 if 657 a call to a noreturn function is seen. */ 658 659 extern int current_function_returns_abnormally; 660 661 /* Mode used to build pointers (VOIDmode means ptr_mode). */ 662 663 extern enum machine_mode c_default_pointer_mode; 664 665 /* In c-decl.c */ 666 extern void c_finish_incomplete_decl (tree); 667 extern void c_write_global_declarations (void); 668 669 /* In c-errors.c */ 670 extern void pedwarn_c90 (location_t, int opt, const char *, ...) ATTRIBUTE_GCC_DIAG(3,4); 671 extern void pedwarn_c99 (location_t, int opt, const char *, ...) ATTRIBUTE_GCC_DIAG(3,4); 672 673 #endif /* ! GCC_C_TREE_H */ 674