1/* Definitions for c-common.c. 2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998, 3 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 2, or (at your option) any later 10version. 11 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to the Free 19Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 2002110-1301, 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: TREE_NEGATED_INT (in INTEGER_CST). 31 IDENTIFIER_MARKED (used by search routines). 32 DECL_PRETTY_FUNCTION_P (in VAR_DECL) 33 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL) 34 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST) 35 2: unused 36 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST) 37 4: unused 38*/ 39 40/* Reserved identifiers. This is the union of all the keywords for C, 41 C++, and Objective-C. All the type modifiers have to be in one 42 block at the beginning, because they are used as mask bits. There 43 are 27 type modifiers; if we add many more we will have to redesign 44 the mask mechanism. */ 45 46enum rid 47{ 48 /* Modifiers: */ 49 /* C, in empirical order of frequency. */ 50 RID_STATIC = 0, 51 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN, 52 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE, 53 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT, 54 55 /* C extensions */ 56 RID_COMPLEX, RID_THREAD, 57 58 /* C++ */ 59 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE, 60 61 /* ObjC */ 62 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY, 63 64 /* C */ 65 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID, 66 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE, 67 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE, 68 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO, 69 RID_SIZEOF, 70 71 /* C extensions */ 72 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG, 73 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR, 74 RID_TYPES_COMPATIBLE_P, 75 76 /* Too many ways of getting the name of a function as a string */ 77 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME, 78 79 /* C++ */ 80 RID_BOOL, RID_WCHAR, RID_CLASS, 81 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED, 82 RID_TEMPLATE, RID_NULL, RID_CATCH, 83 RID_DELETE, RID_FALSE, RID_NAMESPACE, 84 RID_NEW, RID_OFFSETOF, RID_OPERATOR, 85 RID_THIS, RID_THROW, RID_TRUE, 86 RID_TRY, RID_TYPENAME, RID_TYPEID, 87 RID_USING, 88 89 /* casts */ 90 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST, 91 92 /* Objective-C */ 93 RID_AT_ENCODE, RID_AT_END, 94 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS, 95 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, 96 RID_AT_PROTOCOL, RID_AT_SELECTOR, 97 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH, 98 RID_AT_FINALLY, RID_AT_SYNCHRONIZED, 99 RID_AT_INTERFACE, 100 RID_AT_IMPLEMENTATION, 101 102 RID_MAX, 103 104 RID_FIRST_MODIFIER = RID_STATIC, 105 RID_LAST_MODIFIER = RID_ONEWAY, 106 107 RID_FIRST_AT = RID_AT_ENCODE, 108 RID_LAST_AT = RID_AT_IMPLEMENTATION, 109 RID_FIRST_PQ = RID_IN, 110 RID_LAST_PQ = RID_ONEWAY 111}; 112 113#define OBJC_IS_AT_KEYWORD(rid) \ 114 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \ 115 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT) 116 117#define OBJC_IS_PQ_KEYWORD(rid) \ 118 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \ 119 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ) 120 121/* The elements of `ridpointers' are identifier nodes for the reserved 122 type names and storage classes. It is indexed by a RID_... value. */ 123extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers; 124 125/* Standard named or nameless data types of the C compiler. */ 126 127enum c_tree_index 128{ 129 CTI_WCHAR_TYPE, 130 CTI_SIGNED_WCHAR_TYPE, 131 CTI_UNSIGNED_WCHAR_TYPE, 132 CTI_WINT_TYPE, 133 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */ 134 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */ 135 CTI_INTMAX_TYPE, 136 CTI_UINTMAX_TYPE, 137 CTI_WIDEST_INT_LIT_TYPE, 138 CTI_WIDEST_UINT_LIT_TYPE, 139 140 CTI_CHAR_ARRAY_TYPE, 141 CTI_WCHAR_ARRAY_TYPE, 142 CTI_INT_ARRAY_TYPE, 143 CTI_STRING_TYPE, 144 CTI_CONST_STRING_TYPE, 145 146 /* Type for boolean expressions (bool in C++, int in C). */ 147 CTI_TRUTHVALUE_TYPE, 148 CTI_TRUTHVALUE_TRUE, 149 CTI_TRUTHVALUE_FALSE, 150 151 CTI_DEFAULT_FUNCTION_TYPE, 152 153 /* These are not types, but we have to look them up all the time. */ 154 CTI_FUNCTION_NAME_DECL, 155 CTI_PRETTY_FUNCTION_NAME_DECL, 156 CTI_C99_FUNCTION_NAME_DECL, 157 CTI_SAVED_FUNCTION_NAME_DECLS, 158 159 CTI_VOID_ZERO, 160 161 CTI_NULL, 162 163 CTI_MAX 164}; 165 166#define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code) 167 168/* Identifier part common to the C front ends. Inherits from 169 tree_identifier, despite appearances. */ 170struct c_common_identifier GTY(()) 171{ 172 struct tree_common common; 173 struct cpp_hashnode node; 174}; 175 176#define wchar_type_node c_global_trees[CTI_WCHAR_TYPE] 177#define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE] 178#define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE] 179#define wint_type_node c_global_trees[CTI_WINT_TYPE] 180#define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE] 181#define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE] 182#define intmax_type_node c_global_trees[CTI_INTMAX_TYPE] 183#define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE] 184#define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE] 185#define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE] 186 187#define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE] 188#define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE] 189#define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE] 190 191#define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE] 192#define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE] 193#define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE] 194#define string_type_node c_global_trees[CTI_STRING_TYPE] 195#define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE] 196 197#define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE] 198 199#define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL] 200#define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL] 201#define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL] 202#define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS] 203 204/* A node for `((void) 0)'. */ 205#define void_zero_node c_global_trees[CTI_VOID_ZERO] 206 207/* The node for C++ `__null'. */ 208#define null_node c_global_trees[CTI_NULL] 209 210extern GTY(()) tree c_global_trees[CTI_MAX]; 211 212/* In a RECORD_TYPE, a sorted array of the fields of the type, not a 213 tree for size reasons. */ 214struct sorted_fields_type GTY(()) 215{ 216 int len; 217 tree GTY((length ("%h.len"))) elts[1]; 218}; 219 220/* Mark which labels are explicitly declared. 221 These may be shadowed, and may be referenced from nested functions. */ 222#define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label) 223 224typedef enum c_language_kind 225{ 226 clk_c = 0, /* C90, C94 or C99 */ 227 clk_objc = 1, /* clk_c with ObjC features. */ 228 clk_cxx = 2, /* ANSI/ISO C++ */ 229 clk_objcxx = 3 /* clk_cxx with ObjC features. */ 230} 231c_language_kind; 232 233/* To test for a specific language use c_language, defined by each 234 front end. For "ObjC features" or "not C++" use the macros. */ 235extern c_language_kind c_language; 236 237#define c_dialect_cxx() (c_language & clk_cxx) 238#define c_dialect_objc() (c_language & clk_objc) 239 240/* Information about a statement tree. */ 241 242struct stmt_tree_s GTY(()) { 243 /* The current statement list being collected. */ 244 tree x_cur_stmt_list; 245 246 /* In C++, Nonzero if we should treat statements as full 247 expressions. In particular, this variable is no-zero if at the 248 end of a statement we should destroy any temporaries created 249 during that statement. Similarly, if, at the end of a block, we 250 should destroy any local variables in this block. Normally, this 251 variable is nonzero, since those are the normal semantics of 252 C++. 253 254 However, in order to represent aggregate initialization code as 255 tree structure, we use statement-expressions. The statements 256 within the statement expression should not result in cleanups 257 being run until the entire enclosing statement is complete. 258 259 This flag has no effect in C. */ 260 int stmts_are_full_exprs_p; 261}; 262 263typedef struct stmt_tree_s *stmt_tree; 264 265/* Global state pertinent to the current function. Some C dialects 266 extend this structure with additional fields. */ 267 268struct c_language_function GTY(()) { 269 /* While we are parsing the function, this contains information 270 about the statement-tree that we are building. */ 271 struct stmt_tree_s x_stmt_tree; 272}; 273 274/* When building a statement-tree, this is the current statement list 275 being collected. It's TREE_CHAIN is a back-pointer to the previous 276 statement list. */ 277 278#define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list) 279 280/* Language-specific hooks. */ 281 282/* Callback that determines if it's ok for a function to have no 283 noreturn attribute. */ 284extern int (*lang_missing_noreturn_ok_p) (tree); 285 286/* If non-NULL, this function is called after a precompile header file 287 is loaded. */ 288extern void (*lang_post_pch_load) (void); 289 290extern void push_file_scope (void); 291extern void pop_file_scope (void); 292extern int yyparse (void); 293extern stmt_tree current_stmt_tree (void); 294extern tree push_stmt_list (void); 295extern tree pop_stmt_list (tree); 296extern tree add_stmt (tree); 297extern void push_cleanup (tree, tree, bool); 298 299extern int c_expand_decl (tree); 300 301extern int field_decl_cmp (const void *, const void *); 302extern void resort_sorted_fields (void *, void *, gt_pointer_operator, 303 void *); 304extern bool has_c_linkage (tree decl); 305 306/* Switches common to the C front ends. */ 307 308/* Nonzero if prepreprocessing only. */ 309 310extern int flag_preprocess_only; 311 312/* Zero means that faster, ...NonNil variants of objc_msgSend... 313 calls will be used in ObjC; passing nil receivers to such calls 314 will most likely result in crashes. */ 315extern int flag_nil_receivers; 316 317/* Nonzero means that we will allow new ObjC exception syntax (@throw, 318 @try, etc.) in source code. */ 319extern int flag_objc_exceptions; 320 321/* Nonzero means that we generate NeXT setjmp based exceptions. */ 322extern int flag_objc_sjlj_exceptions; 323 324/* Nonzero means that code generation will be altered to support 325 "zero-link" execution. This currently affects ObjC only, but may 326 affect other languages in the future. */ 327extern int flag_zero_link; 328 329/* Nonzero means emit an '__OBJC, __image_info' for the current translation 330 unit. It will inform the ObjC runtime that class definition(s) herein 331 contained are to replace one(s) previously loaded. */ 332extern int flag_replace_objc_classes; 333 334/* Nonzero means don't output line number information. */ 335 336extern char flag_no_line_commands; 337 338/* Nonzero causes -E output not to be done, but directives such as 339 #define that have side effects are still obeyed. */ 340 341extern char flag_no_output; 342 343/* Nonzero means dump macros in some fashion; contains the 'D', 'M' or 344 'N' of the command line switch. */ 345 346extern char flag_dump_macros; 347 348/* Nonzero means pass #include lines through to the output. */ 349 350extern char flag_dump_includes; 351 352/* Nonzero means process PCH files while preprocessing. */ 353 354extern bool flag_pch_preprocess; 355 356/* The file name to which we should write a precompiled header, or 357 NULL if no header will be written in this compile. */ 358 359extern const char *pch_file; 360 361/* Nonzero if an ISO standard was selected. It rejects macros in the 362 user's namespace. */ 363 364extern int flag_iso; 365 366/* Nonzero if -undef was given. It suppresses target built-in macros 367 and assertions. */ 368 369extern int flag_undef; 370 371/* Nonzero means don't recognize the non-ANSI builtin functions. */ 372 373extern int flag_no_builtin; 374 375/* Nonzero means don't recognize the non-ANSI builtin functions. 376 -ansi sets this. */ 377 378extern int flag_no_nonansi_builtin; 379 380/* Nonzero means give `double' the same size as `float'. */ 381 382extern int flag_short_double; 383 384/* Nonzero means give `wchar_t' the same size as `short'. */ 385 386extern int flag_short_wchar; 387 388/* Nonzero means allow Microsoft extensions without warnings or errors. */ 389extern int flag_ms_extensions; 390 391/* Nonzero means don't recognize the keyword `asm'. */ 392 393extern int flag_no_asm; 394 395/* Nonzero means give string constants the type `const char *', as mandated 396 by the standard. */ 397 398extern int flag_const_strings; 399 400/* Nonzero means to treat bitfields as signed unless they say `unsigned'. */ 401 402extern int flag_signed_bitfields; 403 404/* Nonzero means warn about deprecated conversion from string constant to 405 `char *'. */ 406 407extern int warn_write_strings; 408 409/* Warn about #pragma directives that are not recognized. */ 410 411extern int warn_unknown_pragmas; /* Tri state variable. */ 412 413/* Warn about format/argument anomalies in calls to formatted I/O functions 414 (*printf, *scanf, strftime, strfmon, etc.). */ 415 416extern int warn_format; 417 418 419/* C/ObjC language option variables. */ 420 421 422/* Nonzero means allow type mismatches in conditional expressions; 423 just make their values `void'. */ 424 425extern int flag_cond_mismatch; 426 427/* Nonzero means enable C89 Amendment 1 features. */ 428 429extern int flag_isoc94; 430 431/* Nonzero means use the ISO C99 dialect of C. */ 432 433extern int flag_isoc99; 434 435/* Nonzero means that we have builtin functions, and main is an int. */ 436 437extern int flag_hosted; 438 439/* Warn if main is suspicious. */ 440 441extern int warn_main; 442 443 444/* ObjC language option variables. */ 445 446 447/* Open and close the file for outputting class declarations, if 448 requested (ObjC). */ 449 450extern int flag_gen_declaration; 451 452/* Tells the compiler that this is a special run. Do not perform any 453 compiling, instead we are to test some platform dependent features 454 and output a C header file with appropriate definitions. */ 455 456extern int print_struct_values; 457 458/* ???. Undocumented. */ 459 460extern const char *constant_string_class_name; 461 462 463/* C++ language option variables. */ 464 465 466/* Nonzero means don't recognize any extension keywords. */ 467 468extern int flag_no_gnu_keywords; 469 470/* Nonzero means do emit exported implementations of functions even if 471 they can be inlined. */ 472 473extern int flag_implement_inlines; 474 475/* Nonzero means that implicit instantiations will be emitted if needed. */ 476 477extern int flag_implicit_templates; 478 479/* Nonzero means that implicit instantiations of inline templates will be 480 emitted if needed, even if instantiations of non-inline templates 481 aren't. */ 482 483extern int flag_implicit_inline_templates; 484 485/* Nonzero means generate separate instantiation control files and 486 juggle them at link time. */ 487 488extern int flag_use_repository; 489 490/* Nonzero if we want to issue diagnostics that the standard says are not 491 required. */ 492 493extern int flag_optional_diags; 494 495/* Nonzero means we should attempt to elide constructors when possible. */ 496 497extern int flag_elide_constructors; 498 499/* Nonzero means that member functions defined in class scope are 500 inline by default. */ 501 502extern int flag_default_inline; 503 504/* Controls whether compiler generates 'type descriptor' that give 505 run-time type information. */ 506 507extern int flag_rtti; 508 509/* Nonzero if we want to conserve space in the .o files. We do this 510 by putting uninitialized data and runtime initialized data into 511 .common instead of .data at the expense of not flagging multiple 512 definitions. */ 513 514extern int flag_conserve_space; 515 516/* Nonzero if we want to obey access control semantics. */ 517 518extern int flag_access_control; 519 520/* Nonzero if we want to check the return value of new and avoid calling 521 constructors if it is a null pointer. */ 522 523extern int flag_check_new; 524 525/* Nonzero if we want the new ISO rules for pushing a new scope for `for' 526 initialization variables. 527 0: Old rules, set by -fno-for-scope. 528 2: New ISO rules, set by -ffor-scope. 529 1: Try to implement new ISO rules, but with backup compatibility 530 (and warnings). This is the default, for now. */ 531 532extern int flag_new_for_scope; 533 534/* Nonzero if we want to emit defined symbols with common-like linkage as 535 weak symbols where possible, in order to conform to C++ semantics. 536 Otherwise, emit them as local symbols. */ 537 538extern int flag_weak; 539 540/* 0 means we want the preprocessor to not emit line directives for 541 the current working directory. 1 means we want it to do it. -1 542 means we should decide depending on whether debugging information 543 is being emitted or not. */ 544 545extern int flag_working_directory; 546 547/* Nonzero to use __cxa_atexit, rather than atexit, to register 548 destructors for local statics and global objects. */ 549 550extern int flag_use_cxa_atexit; 551 552/* Nonzero means make the default pedwarns warnings instead of errors. 553 The value of this flag is ignored if -pedantic is specified. */ 554 555extern int flag_permissive; 556 557/* Nonzero means to implement standard semantics for exception 558 specifications, calling unexpected if an exception is thrown that 559 doesn't match the specification. Zero means to treat them as 560 assertions and optimize accordingly, but not check them. */ 561 562extern int flag_enforce_eh_specs; 563 564/* Nonzero (the default) means to generate thread-safe code for 565 initializing local statics. */ 566 567extern int flag_threadsafe_statics; 568 569/* Nonzero means warn about implicit declarations. */ 570 571extern int warn_implicit; 572 573/* Warn about using __null (as NULL in C++) as sentinel. For code compiled 574 with GCC this doesn't matter as __null is guaranteed to have the right 575 size. */ 576 577extern int warn_strict_null_sentinel; 578 579/* Maximum template instantiation depth. This limit is rather 580 arbitrary, but it exists to limit the time it takes to notice 581 infinite template instantiations. */ 582 583extern int max_tinst_depth; 584 585/* Nonzero means the expression being parsed will never be evaluated. 586 This is a count, since unevaluated expressions can nest. */ 587 588extern int skip_evaluation; 589 590/* C types are partitioned into three subsets: object, function, and 591 incomplete types. */ 592#define C_TYPE_OBJECT_P(type) \ 593 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type)) 594 595#define C_TYPE_INCOMPLETE_P(type) \ 596 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0) 597 598#define C_TYPE_FUNCTION_P(type) \ 599 (TREE_CODE (type) == FUNCTION_TYPE) 600 601/* For convenience we define a single macro to identify the class of 602 object or incomplete types. */ 603#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \ 604 (!C_TYPE_FUNCTION_P (type)) 605 606/* Attribute table common to the C front ends. */ 607extern const struct attribute_spec c_common_attribute_table[]; 608extern const struct attribute_spec c_common_format_attribute_table[]; 609 610/* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc. 611 ID is the identifier to use, NAME is the string. 612 TYPE_DEP indicates whether it depends on type of the function or not 613 (i.e. __PRETTY_FUNCTION__). */ 614 615extern tree (*make_fname_decl) (tree, int); 616 617extern tree identifier_global_value (tree); 618extern void record_builtin_type (enum rid, const char *, tree); 619extern tree build_void_list_node (void); 620extern void start_fname_decls (void); 621extern void finish_fname_decls (void); 622extern const char *fname_as_string (int); 623extern tree fname_decl (unsigned, tree); 624 625extern void check_function_arguments (tree, tree, tree); 626extern void check_function_arguments_recurse (void (*) 627 (void *, tree, 628 unsigned HOST_WIDE_INT), 629 void *, tree, 630 unsigned HOST_WIDE_INT); 631extern void check_function_format (tree, tree); 632extern void set_Wformat (int); 633extern tree handle_format_attribute (tree *, tree, tree, int, bool *); 634extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *); 635extern int c_common_handle_option (size_t code, const char *arg, int value); 636extern bool c_common_missing_argument (const char *opt, size_t code); 637extern tree c_common_type_for_mode (enum machine_mode, int); 638extern tree c_common_type_for_size (unsigned int, int); 639extern tree c_common_unsigned_type (tree); 640extern tree c_common_signed_type (tree); 641extern tree c_common_signed_or_unsigned_type (int, tree); 642extern tree c_common_truthvalue_conversion (tree); 643extern void c_apply_type_quals_to_decl (int, tree); 644extern tree c_sizeof_or_alignof_type (tree, bool, int); 645extern tree c_alignof_expr (tree); 646/* Print an error message for invalid operands to arith operation CODE. 647 NOP_EXPR is used as a special case (see truthvalue_conversion). */ 648extern void binary_op_error (enum tree_code); 649extern tree fix_string_type (tree); 650struct varray_head_tag; 651extern void constant_expression_warning (tree); 652extern void strict_aliasing_warning(tree, tree, tree); 653extern tree convert_and_check (tree, tree); 654extern void overflow_warning (tree); 655extern void unsigned_conversion_warning (tree, tree); 656extern bool c_determine_visibility (tree); 657extern bool same_scalar_type_ignoring_signedness (tree, tree); 658 659#define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1) 660#define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1) 661 662/* Subroutine of build_binary_op, used for comparison operations. 663 See if the operands have both been converted from subword integer types 664 and, if so, perhaps change them both back to their original type. */ 665extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *); 666 667extern tree pointer_int_sum (enum tree_code, tree, tree); 668extern unsigned int min_precision (tree, int); 669 670/* Add qualifiers to a type, in the fashion for C. */ 671extern tree c_build_qualified_type (tree, int); 672 673/* Build tree nodes and builtin functions common to both C and C++ language 674 frontends. */ 675extern void c_common_nodes_and_builtins (void); 676 677extern void set_builtin_user_assembler_name (tree decl, const char *asmspec); 678 679extern void disable_builtin_function (const char *); 680 681extern void set_compound_literal_name (tree decl); 682 683extern tree build_va_arg (tree, tree); 684 685extern unsigned int c_common_init_options (unsigned int, const char **); 686extern bool c_common_post_options (const char **); 687extern bool c_common_init (void); 688extern void c_common_finish (void); 689extern void c_common_parse_file (int); 690extern HOST_WIDE_INT c_common_get_alias_set (tree); 691extern void c_register_builtin_type (tree, const char*); 692extern bool c_promoting_integer_type_p (tree); 693extern int self_promoting_args_p (tree); 694extern tree strip_array_types (tree); 695extern tree strip_pointer_operator (tree); 696extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT); 697 698/* This is the basic parsing function. */ 699extern void c_parse_file (void); 700/* This is misnamed, it actually performs end-of-compilation processing. */ 701extern void finish_file (void); 702 703 704/* These macros provide convenient access to the various _STMT nodes. */ 705 706/* Nonzero if a given STATEMENT_LIST represents the outermost binding 707 if a statement expression. */ 708#define STATEMENT_LIST_STMT_EXPR(NODE) \ 709 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE)) 710 711/* Nonzero if a label has been added to the statement list. */ 712#define STATEMENT_LIST_HAS_LABEL(NODE) \ 713 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE)) 714 715/* COMPOUND_LITERAL_EXPR accessors. */ 716#define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \ 717 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0) 718#define COMPOUND_LITERAL_EXPR_DECL(NODE) \ 719 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE)) 720 721#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM, 722 723enum c_tree_code { 724 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE, 725#include "c-common.def" 726 LAST_C_TREE_CODE 727}; 728 729#undef DEFTREECODE 730 731extern int anon_aggr_type_p (tree); 732 733/* For a VAR_DECL that is an anonymous union, these are the various 734 sub-variables that make up the anonymous union. */ 735#define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE)) 736 737/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */ 738#define DECL_C_BIT_FIELD(NODE) \ 739 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1) 740#define SET_DECL_C_BIT_FIELD(NODE) \ 741 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1) 742#define CLEAR_DECL_C_BIT_FIELD(NODE) \ 743 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0) 744 745extern void emit_local_var (tree); 746extern tree do_case (tree, tree); 747extern tree build_stmt (enum tree_code, ...); 748extern tree build_case_label (tree, tree, tree); 749 750/* These functions must be defined by each front-end which implements 751 a variant of the C language. They are used in c-common.c. */ 752 753extern tree build_unary_op (enum tree_code, tree, int); 754extern tree build_binary_op (enum tree_code, tree, tree, int); 755extern tree perform_integral_promotions (tree); 756 757/* Given two integer or real types, return the type for their sum. 758 Given two compatible ANSI C types, returns the merged type. */ 759 760extern tree common_type (tree, tree); 761 762extern tree decl_constant_value (tree); 763 764/* Handle increment and decrement of boolean types. */ 765extern tree boolean_increment (enum tree_code, tree); 766 767extern int case_compare (splay_tree_key, splay_tree_key); 768 769extern tree c_add_case_label (splay_tree, tree, tree, tree, tree); 770 771extern void c_do_switch_warnings (splay_tree, location_t, tree, tree); 772 773extern tree build_function_call (tree, tree); 774 775extern tree resolve_overloaded_builtin (tree, tree); 776 777extern tree finish_label_address_expr (tree); 778 779/* Same function prototype, but the C and C++ front ends have 780 different implementations. Used in c-common.c. */ 781extern tree lookup_label (tree); 782 783extern int vector_types_convertible_p (tree t1, tree t2); 784 785extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *); 786 787extern tree c_staticp (tree); 788 789extern void init_c_lex (void); 790 791extern void c_cpp_builtins (cpp_reader *); 792 793/* Positive if an implicit `extern "C"' scope has just been entered; 794 negative if such a scope has just been exited. */ 795extern GTY(()) int pending_lang_change; 796 797/* Information recorded about each file examined during compilation. */ 798 799struct c_fileinfo 800{ 801 int time; /* Time spent in the file. */ 802 803 /* Flags used only by C++. 804 INTERFACE_ONLY nonzero means that we are in an "interface" section 805 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust 806 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and 807 INTERFACE_ONLY is zero, it means that we are responsible for 808 exporting definitions that others might need. */ 809 short interface_only; 810 short interface_unknown; 811}; 812 813struct c_fileinfo *get_fileinfo (const char *); 814extern void dump_time_statistics (void); 815 816extern bool c_dump_tree (void *, tree); 817 818extern void c_warn_unused_result (tree *); 819 820extern void verify_sequence_points (tree); 821 822extern tree fold_offsetof (tree); 823 824/* Places where an lvalue, or modifiable lvalue, may be required. 825 Used to select diagnostic messages in lvalue_error and 826 readonly_error. */ 827enum lvalue_use { 828 lv_assign, 829 lv_increment, 830 lv_decrement, 831 lv_addressof, 832 lv_asm 833}; 834 835extern void lvalue_error (enum lvalue_use); 836 837extern int complete_array_type (tree *, tree, bool); 838 839extern tree builtin_type_for_size (int, bool); 840 841/* In c-gimplify.c */ 842extern void c_genericize (tree); 843extern int c_gimplify_expr (tree *, tree *, tree *); 844extern tree c_build_bind_expr (tree, tree); 845 846/* In c-pch.c */ 847extern void pch_init (void); 848extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd); 849extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd, 850 const char *orig); 851extern void c_common_write_pch (void); 852extern void c_common_no_more_pch (void); 853extern void c_common_pch_pragma (cpp_reader *pfile); 854extern void c_common_print_pch_checksum (FILE *f); 855 856/* In *-checksum.c */ 857extern const unsigned char executable_checksum[16]; 858 859extern void builtin_define_with_value (const char *, const char *, int); 860extern void c_stddef_cpp_builtins (void); 861extern void fe_file_change (const struct line_map *); 862extern void c_parse_error (const char *, enum cpp_ttype, tree); 863 864/* Objective-C / Objective-C++ entry points. */ 865 866/* The following ObjC/ObjC++ functions are called by the C and/or C++ 867 front-ends; they all must have corresponding stubs in stub-objc.c. */ 868extern tree objc_is_class_name (tree); 869extern tree objc_is_object_ptr (tree); 870extern void objc_check_decl (tree); 871extern int objc_is_reserved_word (tree); 872extern bool objc_compare_types (tree, tree, int, tree); 873extern void objc_volatilize_decl (tree); 874extern bool objc_type_quals_match (tree, tree); 875extern tree objc_rewrite_function_call (tree, tree); 876extern tree objc_message_selector (void); 877extern tree objc_lookup_ivar (tree, tree); 878extern void objc_clear_super_receiver (void); 879extern int objc_is_public (tree, tree); 880extern tree objc_is_id (tree); 881extern void objc_declare_alias (tree, tree); 882extern void objc_declare_class (tree); 883extern void objc_declare_protocols (tree); 884extern tree objc_build_message_expr (tree); 885extern tree objc_finish_message_expr (tree, tree, tree); 886extern tree objc_build_selector_expr (tree); 887extern tree objc_build_protocol_expr (tree); 888extern tree objc_build_encode_expr (tree); 889extern tree objc_build_string_object (tree); 890extern tree objc_get_protocol_qualified_type (tree, tree); 891extern tree objc_get_class_reference (tree); 892extern tree objc_get_class_ivars (tree); 893extern void objc_start_class_interface (tree, tree, tree); 894extern void objc_start_category_interface (tree, tree, tree); 895extern void objc_start_protocol (tree, tree); 896extern void objc_continue_interface (void); 897extern void objc_finish_interface (void); 898extern void objc_start_class_implementation (tree, tree); 899extern void objc_start_category_implementation (tree, tree); 900extern void objc_continue_implementation (void); 901extern void objc_finish_implementation (void); 902extern void objc_set_visibility (int); 903extern void objc_set_method_type (enum tree_code); 904extern tree objc_build_method_signature (tree, tree, tree, bool); 905extern void objc_add_method_declaration (tree); 906extern void objc_start_method_definition (tree); 907extern void objc_finish_method_definition (tree); 908extern void objc_add_instance_variable (tree); 909extern tree objc_build_keyword_decl (tree, tree, tree); 910extern tree objc_build_throw_stmt (tree); 911extern void objc_begin_try_stmt (location_t, tree); 912extern tree objc_finish_try_stmt (void); 913extern void objc_begin_catch_clause (tree); 914extern void objc_finish_catch_clause (void); 915extern void objc_build_finally_clause (location_t, tree); 916extern tree objc_build_synchronized (location_t, tree, tree); 917extern int objc_static_init_needed_p (void); 918extern tree objc_generate_static_init_call (tree); 919extern tree objc_generate_write_barrier (tree, enum tree_code, tree); 920 921/* The following are provided by the C and C++ front-ends, and called by 922 ObjC/ObjC++. */ 923extern void *objc_get_current_scope (void); 924extern void objc_mark_locals_volatile (void *); 925 926/* In c-ppoutput.c */ 927extern void init_pp_output (FILE *); 928extern void preprocess_file (cpp_reader *); 929extern void pp_file_change (const struct line_map *); 930extern void pp_dir_change (cpp_reader *, const char *); 931extern bool check_missing_format_attribute (tree, tree); 932 933/* In order for the format checking to accept the C frontend 934 diagnostic framework extensions, you must include this file before 935 toplev.h, not after. The C front end formats are a subset of those 936 for C++, so they are the appropriate set to use in common code; 937 cp-tree.h overrides this for C++. */ 938#ifndef GCC_DIAG_STYLE 939#define GCC_DIAG_STYLE __gcc_cdiag__ 940#endif 941 942#endif /* ! GCC_C_COMMON_H */ 943