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, RID_BUILTIN_COMPLEX, 75 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128, 76 77 /* Too many ways of getting the name of a function as a string */ 78 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME, 79 80 /* C++ */ 81 RID_BOOL, RID_WCHAR, RID_CLASS, 82 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED, 83 RID_TEMPLATE, RID_NULL, RID_CATCH, 84 RID_DELETE, RID_FALSE, RID_NAMESPACE, 85 RID_NEW, RID_OFFSETOF, RID_OPERATOR, 86 RID_THIS, RID_THROW, RID_TRUE, 87 RID_TRY, RID_TYPENAME, RID_TYPEID, 88 RID_USING, 89 90 /* casts */ 91 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST, 92 93 /* Objective-C */ 94 RID_AT_ENCODE, RID_AT_END, 95 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS, 96 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, 97 RID_AT_PROTOCOL, RID_AT_SELECTOR, 98 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH, 99 RID_AT_FINALLY, RID_AT_SYNCHRONIZED, 100 RID_AT_INTERFACE, 101 RID_AT_IMPLEMENTATION, 102 103 RID_MAX, 104 105 RID_FIRST_MODIFIER = RID_STATIC, 106 RID_LAST_MODIFIER = RID_ONEWAY, 107 108 RID_FIRST_AT = RID_AT_ENCODE, 109 RID_LAST_AT = RID_AT_IMPLEMENTATION, 110 RID_FIRST_PQ = RID_IN, 111 RID_LAST_PQ = RID_ONEWAY 112}; 113 114#define OBJC_IS_AT_KEYWORD(rid) \ 115 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \ 116 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT) 117 118#define OBJC_IS_PQ_KEYWORD(rid) \ 119 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \ 120 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ) 121 122/* The elements of `ridpointers' are identifier nodes for the reserved 123 type names and storage classes. It is indexed by a RID_... value. */ 124extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers; 125 126/* Standard named or nameless data types of the C compiler. */ 127 128enum c_tree_index 129{ 130 CTI_WCHAR_TYPE, 131 CTI_SIGNED_WCHAR_TYPE, 132 CTI_UNSIGNED_WCHAR_TYPE, 133 CTI_WINT_TYPE, 134 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */ 135 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */ 136 CTI_INTMAX_TYPE, 137 CTI_UINTMAX_TYPE, 138 CTI_WIDEST_INT_LIT_TYPE, 139 CTI_WIDEST_UINT_LIT_TYPE, 140 141 CTI_CHAR_ARRAY_TYPE, 142 CTI_WCHAR_ARRAY_TYPE, 143 CTI_INT_ARRAY_TYPE, 144 CTI_STRING_TYPE, 145 CTI_CONST_STRING_TYPE, 146 147 /* Type for boolean expressions (bool in C++, int in C). */ 148 CTI_TRUTHVALUE_TYPE, 149 CTI_TRUTHVALUE_TRUE, 150 CTI_TRUTHVALUE_FALSE, 151 152 CTI_DEFAULT_FUNCTION_TYPE, 153 154 /* These are not types, but we have to look them up all the time. */ 155 CTI_FUNCTION_NAME_DECL, 156 CTI_PRETTY_FUNCTION_NAME_DECL, 157 CTI_C99_FUNCTION_NAME_DECL, 158 CTI_SAVED_FUNCTION_NAME_DECLS, 159 160 CTI_VOID_ZERO, 161 162 CTI_NULL, 163 164 CTI_MAX 165}; 166 167#define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code) 168 169/* Identifier part common to the C front ends. Inherits from 170 tree_identifier, despite appearances. */ 171struct c_common_identifier GTY(()) 172{ 173 struct tree_common common; 174 struct cpp_hashnode node; 175}; 176 177#define wchar_type_node c_global_trees[CTI_WCHAR_TYPE] 178#define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE] 179#define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE] 180#define wint_type_node c_global_trees[CTI_WINT_TYPE] 181#define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE] 182#define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE] 183#define intmax_type_node c_global_trees[CTI_INTMAX_TYPE] 184#define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE] 185#define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE] 186#define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE] 187 188#define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE] 189#define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE] 190#define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE] 191 192#define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE] 193#define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE] 194#define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE] 195#define string_type_node c_global_trees[CTI_STRING_TYPE] 196#define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE] 197 198#define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE] 199 200#define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL] 201#define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL] 202#define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL] 203#define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS] 204 205/* A node for `((void) 0)'. */ 206#define void_zero_node c_global_trees[CTI_VOID_ZERO] 207 208/* The node for C++ `__null'. */ 209#define null_node c_global_trees[CTI_NULL] 210 211extern GTY(()) tree c_global_trees[CTI_MAX]; 212 213/* In a RECORD_TYPE, a sorted array of the fields of the type, not a 214 tree for size reasons. */ 215struct sorted_fields_type GTY(()) 216{ 217 int len; 218 tree GTY((length ("%h.len"))) elts[1]; 219}; 220 221/* Mark which labels are explicitly declared. 222 These may be shadowed, and may be referenced from nested functions. */ 223#define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label) 224 225typedef enum c_language_kind 226{ 227 clk_c = 0, /* C90, C94 or C99 */ 228 clk_objc = 1, /* clk_c with ObjC features. */ 229 clk_cxx = 2, /* ANSI/ISO C++ */ 230 clk_objcxx = 3 /* clk_cxx with ObjC features. */ 231} 232c_language_kind; 233 234/* To test for a specific language use c_language, defined by each 235 front end. For "ObjC features" or "not C++" use the macros. */ 236extern c_language_kind c_language; 237 238#define c_dialect_cxx() (c_language & clk_cxx) 239#define c_dialect_objc() (c_language & clk_objc) 240 241/* Information about a statement tree. */ 242 243struct stmt_tree_s GTY(()) { 244 /* The current statement list being collected. */ 245 tree x_cur_stmt_list; 246 247 /* In C++, Nonzero if we should treat statements as full 248 expressions. In particular, this variable is no-zero if at the 249 end of a statement we should destroy any temporaries created 250 during that statement. Similarly, if, at the end of a block, we 251 should destroy any local variables in this block. Normally, this 252 variable is nonzero, since those are the normal semantics of 253 C++. 254 255 However, in order to represent aggregate initialization code as 256 tree structure, we use statement-expressions. The statements 257 within the statement expression should not result in cleanups 258 being run until the entire enclosing statement is complete. 259 260 This flag has no effect in C. */ 261 int stmts_are_full_exprs_p; 262}; 263 264typedef struct stmt_tree_s *stmt_tree; 265 266/* Global state pertinent to the current function. Some C dialects 267 extend this structure with additional fields. */ 268 269struct c_language_function GTY(()) { 270 /* While we are parsing the function, this contains information 271 about the statement-tree that we are building. */ 272 struct stmt_tree_s x_stmt_tree; 273}; 274 275/* When building a statement-tree, this is the current statement list 276 being collected. It's TREE_CHAIN is a back-pointer to the previous 277 statement list. */ 278 279#define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list) 280 281/* Language-specific hooks. */ 282 283/* Callback that determines if it's ok for a function to have no 284 noreturn attribute. */ 285extern int (*lang_missing_noreturn_ok_p) (tree); 286 287/* If non-NULL, this function is called after a precompile header file 288 is loaded. */ 289extern void (*lang_post_pch_load) (void); 290 291extern void push_file_scope (void); 292extern void pop_file_scope (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); 298extern tree pushdecl_top_level (tree); 299extern tree pushdecl (tree); 300extern tree build_modify_expr (tree, enum tree_code, tree); 301extern tree build_indirect_ref (tree, const char *); 302 303extern int c_expand_decl (tree); 304 305extern int field_decl_cmp (const void *, const void *); 306extern void resort_sorted_fields (void *, void *, gt_pointer_operator, 307 void *); 308extern bool has_c_linkage (tree decl); 309 310/* Switches common to the C front ends. */ 311 312/* Nonzero if prepreprocessing only. */ 313 314extern int flag_preprocess_only; 315 316/* Zero means that faster, ...NonNil variants of objc_msgSend... 317 calls will be used in ObjC; passing nil receivers to such calls 318 will most likely result in crashes. */ 319extern int flag_nil_receivers; 320 321/* Nonzero means that we will allow new ObjC exception syntax (@throw, 322 @try, etc.) in source code. */ 323extern int flag_objc_exceptions; 324 325/* Nonzero means that we generate NeXT setjmp based exceptions. */ 326extern int flag_objc_sjlj_exceptions; 327 328/* Nonzero means that code generation will be altered to support 329 "zero-link" execution. This currently affects ObjC only, but may 330 affect other languages in the future. */ 331extern int flag_zero_link; 332 333/* Nonzero means emit an '__OBJC, __image_info' for the current translation 334 unit. It will inform the ObjC runtime that class definition(s) herein 335 contained are to replace one(s) previously loaded. */ 336extern int flag_replace_objc_classes; 337 338/* Nonzero means don't output line number information. */ 339 340extern char flag_no_line_commands; 341 342/* Nonzero causes -E output not to be done, but directives such as 343 #define that have side effects are still obeyed. */ 344 345extern char flag_no_output; 346 347/* Nonzero means dump macros in some fashion; contains the 'D', 'M' or 348 'N' of the command line switch. */ 349 350extern char flag_dump_macros; 351 352/* Nonzero means pass #include lines through to the output. */ 353 354extern char flag_dump_includes; 355 356/* Nonzero means process PCH files while preprocessing. */ 357 358extern bool flag_pch_preprocess; 359 360/* The file name to which we should write a precompiled header, or 361 NULL if no header will be written in this compile. */ 362 363extern const char *pch_file; 364 365/* Nonzero if an ISO standard was selected. It rejects macros in the 366 user's namespace. */ 367 368extern int flag_iso; 369 370/* Nonzero if -undef was given. It suppresses target built-in macros 371 and assertions. */ 372 373extern int flag_undef; 374 375/* Nonzero means don't recognize the non-ANSI builtin functions. */ 376 377extern int flag_no_builtin; 378 379/* Nonzero means don't recognize the non-ANSI builtin functions. 380 -ansi sets this. */ 381 382extern int flag_no_nonansi_builtin; 383 384/* Nonzero means give `double' the same size as `float'. */ 385 386extern int flag_short_double; 387 388/* Nonzero means give `wchar_t' the same size as `short'. */ 389 390extern int flag_short_wchar; 391 392/* Nonzero means allow Microsoft extensions without warnings or errors. */ 393extern int flag_ms_extensions; 394 395/* Nonzero means don't recognize the keyword `asm'. */ 396 397extern int flag_no_asm; 398 399/* Nonzero means give string constants the type `const char *', as mandated 400 by the standard. */ 401 402extern int flag_const_strings; 403 404/* Nonzero means to treat bitfields as signed unless they say `unsigned'. */ 405 406extern int flag_signed_bitfields; 407 408/* Warn about #pragma directives that are not recognized. */ 409 410extern int warn_unknown_pragmas; /* Tri state variable. */ 411 412/* Warn about format/argument anomalies in calls to formatted I/O functions 413 (*printf, *scanf, strftime, strfmon, etc.). */ 414 415extern int warn_format; 416 417/* C/ObjC language option variables. */ 418 419 420/* Nonzero means allow type mismatches in conditional expressions; 421 just make their values `void'. */ 422 423extern int flag_cond_mismatch; 424 425/* Nonzero means enable C89 Amendment 1 features. */ 426 427extern int flag_isoc94; 428 429/* Nonzero means use the ISO C99 dialect of C. */ 430 431extern int flag_isoc99; 432 433/* Nonzero means that we have builtin functions, and main is an int. */ 434 435extern int flag_hosted; 436 437/* Warn if main is suspicious. */ 438 439extern int warn_main; 440 441 442/* ObjC language option variables. */ 443 444 445/* Open and close the file for outputting class declarations, if 446 requested (ObjC). */ 447 448extern int flag_gen_declaration; 449 450/* Tells the compiler that this is a special run. Do not perform any 451 compiling, instead we are to test some platform dependent features 452 and output a C header file with appropriate definitions. */ 453 454extern int print_struct_values; 455 456/* ???. Undocumented. */ 457 458extern const char *constant_string_class_name; 459 460 461/* C++ language option variables. */ 462 463 464/* Nonzero means don't recognize any extension keywords. */ 465 466extern int flag_no_gnu_keywords; 467 468/* Nonzero means do emit exported implementations of functions even if 469 they can be inlined. */ 470 471extern int flag_implement_inlines; 472 473/* Nonzero means that implicit instantiations will be emitted if needed. */ 474 475extern int flag_implicit_templates; 476 477/* Nonzero means that implicit instantiations of inline templates will be 478 emitted if needed, even if instantiations of non-inline templates 479 aren't. */ 480 481extern int flag_implicit_inline_templates; 482 483/* Nonzero means generate separate instantiation control files and 484 juggle them at link time. */ 485 486extern int flag_use_repository; 487 488/* Nonzero if we want to issue diagnostics that the standard says are not 489 required. */ 490 491extern int flag_optional_diags; 492 493/* Nonzero means we should attempt to elide constructors when possible. */ 494 495extern int flag_elide_constructors; 496 497/* Nonzero means that member functions defined in class scope are 498 inline by default. */ 499 500extern int flag_default_inline; 501 502/* Controls whether compiler generates 'type descriptor' that give 503 run-time type information. */ 504 505extern int flag_rtti; 506 507/* Nonzero if we want to conserve space in the .o files. We do this 508 by putting uninitialized data and runtime initialized data into 509 .common instead of .data at the expense of not flagging multiple 510 definitions. */ 511 512extern int flag_conserve_space; 513 514/* Nonzero if we want to obey access control semantics. */ 515 516extern int flag_access_control; 517 518/* Nonzero if we want to check the return value of new and avoid calling 519 constructors if it is a null pointer. */ 520 521extern int flag_check_new; 522 523/* Nonzero if we want the new ISO rules for pushing a new scope for `for' 524 initialization variables. 525 0: Old rules, set by -fno-for-scope. 526 2: New ISO rules, set by -ffor-scope. 527 1: Try to implement new ISO rules, but with backup compatibility 528 (and warnings). This is the default, for now. */ 529 530extern int flag_new_for_scope; 531 532/* Nonzero if we want to emit defined symbols with common-like linkage as 533 weak symbols where possible, in order to conform to C++ semantics. 534 Otherwise, emit them as local symbols. */ 535 536extern int flag_weak; 537 538/* 0 means we want the preprocessor to not emit line directives for 539 the current working directory. 1 means we want it to do it. -1 540 means we should decide depending on whether debugging information 541 is being emitted or not. */ 542 543extern int flag_working_directory; 544 545/* Nonzero to use __cxa_atexit, rather than atexit, to register 546 destructors for local statics and global objects. */ 547 548extern int flag_use_cxa_atexit; 549 550/* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling 551 logic. */ 552 553extern int flag_use_cxa_get_exception_ptr; 554 555/* Nonzero means make the default pedwarns warnings instead of errors. 556 The value of this flag is ignored if -pedantic is specified. */ 557 558extern int flag_permissive; 559 560/* Nonzero means to implement standard semantics for exception 561 specifications, calling unexpected if an exception is thrown that 562 doesn't match the specification. Zero means to treat them as 563 assertions and optimize accordingly, but not check them. */ 564 565extern int flag_enforce_eh_specs; 566 567/* Nonzero (the default) means to generate thread-safe code for 568 initializing local statics. */ 569 570extern int flag_threadsafe_statics; 571 572/* Nonzero means warn about implicit declarations. */ 573 574extern int warn_implicit; 575 576/* Warn about using __null (as NULL in C++) as sentinel. For code compiled 577 with GCC this doesn't matter as __null is guaranteed to have the right 578 size. */ 579 580extern int warn_strict_null_sentinel; 581 582/* Maximum template instantiation depth. This limit is rather 583 arbitrary, but it exists to limit the time it takes to notice 584 infinite template instantiations. */ 585 586extern int max_tinst_depth; 587 588/* Nonzero means the expression being parsed will never be evaluated. 589 This is a count, since unevaluated expressions can nest. */ 590 591extern int skip_evaluation; 592 593/* C types are partitioned into three subsets: object, function, and 594 incomplete types. */ 595#define C_TYPE_OBJECT_P(type) \ 596 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type)) 597 598#define C_TYPE_INCOMPLETE_P(type) \ 599 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0) 600 601#define C_TYPE_FUNCTION_P(type) \ 602 (TREE_CODE (type) == FUNCTION_TYPE) 603 604/* For convenience we define a single macro to identify the class of 605 object or incomplete types. */ 606#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \ 607 (!C_TYPE_FUNCTION_P (type)) 608 609/* Attribute table common to the C front ends. */ 610extern const struct attribute_spec c_common_attribute_table[]; 611extern const struct attribute_spec c_common_format_attribute_table[]; 612 613/* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc. 614 ID is the identifier to use, NAME is the string. 615 TYPE_DEP indicates whether it depends on type of the function or not 616 (i.e. __PRETTY_FUNCTION__). */ 617 618extern tree (*make_fname_decl) (tree, int); 619 620extern tree identifier_global_value (tree); 621extern void record_builtin_type (enum rid, const char *, tree); 622extern tree build_void_list_node (void); 623extern void start_fname_decls (void); 624extern void finish_fname_decls (void); 625extern const char *fname_as_string (int); 626extern tree fname_decl (unsigned, tree); 627 628extern void check_function_arguments (tree, tree, tree); 629extern void check_function_arguments_recurse (void (*) 630 (void *, tree, 631 unsigned HOST_WIDE_INT), 632 void *, tree, 633 unsigned HOST_WIDE_INT); 634extern void check_function_format (tree, tree); 635extern void check_function_bounded (int *, tree, tree); 636extern void set_Wformat (int); 637extern tree handle_bounded_attribute (tree *, tree, tree, int, bool *); 638extern tree handle_format_attribute (tree *, tree, tree, int, bool *); 639extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *); 640extern int c_common_handle_option (size_t code, const char *arg, int value); 641extern bool c_common_missing_argument (const char *opt, size_t code); 642extern tree c_common_type_for_mode (enum machine_mode, int); 643extern tree c_common_type_for_size (unsigned int, int); 644extern tree c_common_unsigned_type (tree); 645extern tree c_common_signed_type (tree); 646extern tree c_common_signed_or_unsigned_type (int, tree); 647extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int); 648extern tree c_common_truthvalue_conversion (tree); 649extern void c_apply_type_quals_to_decl (int, tree); 650extern tree c_sizeof_or_alignof_type (tree, bool, int); 651extern tree c_alignof_expr (tree); 652/* Print an error message for invalid operands to arith operation CODE. 653 NOP_EXPR is used as a special case (see truthvalue_conversion). */ 654extern void binary_op_error (enum tree_code); 655extern tree fix_string_type (tree); 656struct varray_head_tag; 657extern void constant_expression_warning (tree); 658extern void strict_aliasing_warning(tree, tree, tree); 659extern void empty_body_warning (tree, tree); 660extern tree convert_and_check (tree, tree); 661extern void overflow_warning (tree); 662extern bool c_determine_visibility (tree); 663extern bool same_scalar_type_ignoring_signedness (tree, tree); 664 665#define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1) 666#define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1) 667 668/* Subroutine of build_binary_op, used for comparison operations. 669 See if the operands have both been converted from subword integer types 670 and, if so, perhaps change them both back to their original type. */ 671extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *); 672 673extern tree pointer_int_sum (enum tree_code, tree, tree); 674extern unsigned int min_precision (tree, int); 675 676/* Add qualifiers to a type, in the fashion for C. */ 677extern tree c_build_qualified_type (tree, int); 678 679/* Build tree nodes and builtin functions common to both C and C++ language 680 frontends. */ 681extern void c_common_nodes_and_builtins (void); 682 683extern void set_builtin_user_assembler_name (tree decl, const char *asmspec); 684 685extern void disable_builtin_function (const char *); 686 687extern void set_compound_literal_name (tree decl); 688 689extern tree build_va_arg (tree, tree); 690 691extern unsigned int c_common_init_options (unsigned int, const char **); 692extern bool c_common_post_options (const char **); 693extern bool c_common_init (void); 694extern void c_common_finish (void); 695extern void c_common_parse_file (int); 696extern HOST_WIDE_INT c_common_get_alias_set (tree); 697extern void c_register_builtin_type (tree, const char*); 698extern bool c_promoting_integer_type_p (tree); 699extern int self_promoting_args_p (tree); 700extern tree strip_array_types (tree); 701extern tree strip_pointer_operator (tree); 702extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT); 703 704/* This is the basic parsing function. */ 705extern void c_parse_file (void); 706/* This is misnamed, it actually performs end-of-compilation processing. */ 707extern void finish_file (void); 708 709 710/* These macros provide convenient access to the various _STMT nodes. */ 711 712/* Nonzero if a given STATEMENT_LIST represents the outermost binding 713 if a statement expression. */ 714#define STATEMENT_LIST_STMT_EXPR(NODE) \ 715 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE)) 716 717/* Nonzero if a label has been added to the statement list. */ 718#define STATEMENT_LIST_HAS_LABEL(NODE) \ 719 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE)) 720 721/* COMPOUND_LITERAL_EXPR accessors. */ 722#define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \ 723 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0) 724#define COMPOUND_LITERAL_EXPR_DECL(NODE) \ 725 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE)) 726 727#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM, 728 729enum c_tree_code { 730 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE, 731#include "c-common.def" 732 LAST_C_TREE_CODE 733}; 734 735#undef DEFTREECODE 736 737extern int anon_aggr_type_p (tree); 738 739/* For a VAR_DECL that is an anonymous union, these are the various 740 sub-variables that make up the anonymous union. */ 741#define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE)) 742 743/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */ 744#define DECL_C_BIT_FIELD(NODE) \ 745 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1) 746#define SET_DECL_C_BIT_FIELD(NODE) \ 747 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1) 748#define CLEAR_DECL_C_BIT_FIELD(NODE) \ 749 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0) 750 751extern void emit_local_var (tree); 752extern tree do_case (tree, tree); 753extern tree build_stmt (enum tree_code, ...); 754extern tree build_case_label (tree, tree, tree); 755 756/* These functions must be defined by each front-end which implements 757 a variant of the C language. They are used in c-common.c. */ 758 759extern tree build_unary_op (enum tree_code, tree, int); 760extern tree build_binary_op (enum tree_code, tree, tree, int); 761extern tree perform_integral_promotions (tree); 762 763/* These functions must be defined by each front-end which implements 764 a variant of the C language. They are used by port files. */ 765 766extern tree default_conversion (tree); 767 768/* Given two integer or real types, return the type for their sum. 769 Given two compatible ANSI C types, returns the merged type. */ 770 771extern tree common_type (tree, tree); 772 773extern tree decl_constant_value (tree); 774 775/* Handle increment and decrement of boolean types. */ 776extern tree boolean_increment (enum tree_code, tree); 777 778extern int case_compare (splay_tree_key, splay_tree_key); 779 780extern tree c_add_case_label (splay_tree, tree, tree, tree, tree); 781 782extern void c_do_switch_warnings (splay_tree, location_t, tree, tree); 783 784extern tree build_function_call (tree, tree); 785 786extern tree resolve_overloaded_builtin (tree, tree); 787 788extern tree finish_label_address_expr (tree); 789 790/* Same function prototype, but the C and C++ front ends have 791 different implementations. Used in c-common.c. */ 792extern tree lookup_label (tree); 793extern tree lookup_name (tree); 794 795extern int vector_types_convertible_p (tree t1, tree t2); 796 797extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *); 798 799extern tree c_staticp (tree); 800 801extern void init_c_lex (void); 802 803extern void c_cpp_builtins (cpp_reader *); 804 805/* Positive if an implicit `extern "C"' scope has just been entered; 806 negative if such a scope has just been exited. */ 807extern GTY(()) int pending_lang_change; 808 809/* Information recorded about each file examined during compilation. */ 810 811struct c_fileinfo 812{ 813 int time; /* Time spent in the file. */ 814 815 /* Flags used only by C++. 816 INTERFACE_ONLY nonzero means that we are in an "interface" section 817 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust 818 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and 819 INTERFACE_ONLY is zero, it means that we are responsible for 820 exporting definitions that others might need. */ 821 short interface_only; 822 short interface_unknown; 823}; 824 825struct c_fileinfo *get_fileinfo (const char *); 826extern void dump_time_statistics (void); 827 828extern bool c_dump_tree (void *, tree); 829 830extern void c_warn_unused_result (tree *); 831 832extern void verify_sequence_points (tree); 833 834extern tree fold_offsetof (tree, tree); 835 836/* Places where an lvalue, or modifiable lvalue, may be required. 837 Used to select diagnostic messages in lvalue_error and 838 readonly_error. */ 839enum lvalue_use { 840 lv_assign, 841 lv_increment, 842 lv_decrement, 843 lv_addressof, 844 lv_asm 845}; 846 847extern void lvalue_error (enum lvalue_use); 848 849extern int complete_array_type (tree *, tree, bool); 850 851extern tree builtin_type_for_size (int, bool); 852 853extern void warn_array_subscript_with_type_char (tree); 854 855/* In c-gimplify.c */ 856extern void c_genericize (tree); 857extern int c_gimplify_expr (tree *, tree *, tree *); 858extern tree c_build_bind_expr (tree, tree); 859 860/* In c-pch.c */ 861extern void pch_init (void); 862extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd); 863extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd, 864 const char *orig); 865extern void c_common_write_pch (void); 866extern void c_common_no_more_pch (void); 867extern void c_common_pch_pragma (cpp_reader *pfile, const char *); 868extern void c_common_print_pch_checksum (FILE *f); 869 870/* In *-checksum.c */ 871extern const unsigned char executable_checksum[16]; 872 873extern void builtin_define_with_value (const char *, const char *, int); 874extern void c_stddef_cpp_builtins (void); 875extern void fe_file_change (const struct line_map *); 876extern void c_parse_error (const char *, enum cpp_ttype, tree); 877 878/* Objective-C / Objective-C++ entry points. */ 879 880/* The following ObjC/ObjC++ functions are called by the C and/or C++ 881 front-ends; they all must have corresponding stubs in stub-objc.c. */ 882extern tree objc_is_class_name (tree); 883extern tree objc_is_object_ptr (tree); 884extern void objc_check_decl (tree); 885extern int objc_is_reserved_word (tree); 886extern bool objc_compare_types (tree, tree, int, tree); 887extern void objc_volatilize_decl (tree); 888extern bool objc_type_quals_match (tree, tree); 889extern tree objc_rewrite_function_call (tree, tree); 890extern tree objc_message_selector (void); 891extern tree objc_lookup_ivar (tree, tree); 892extern void objc_clear_super_receiver (void); 893extern int objc_is_public (tree, tree); 894extern tree objc_is_id (tree); 895extern void objc_declare_alias (tree, tree); 896extern void objc_declare_class (tree); 897extern void objc_declare_protocols (tree); 898extern tree objc_build_message_expr (tree); 899extern tree objc_finish_message_expr (tree, tree, tree); 900extern tree objc_build_selector_expr (tree); 901extern tree objc_build_protocol_expr (tree); 902extern tree objc_build_encode_expr (tree); 903extern tree objc_build_string_object (tree); 904extern tree objc_get_protocol_qualified_type (tree, tree); 905extern tree objc_get_class_reference (tree); 906extern tree objc_get_class_ivars (tree); 907extern void objc_start_class_interface (tree, tree, tree); 908extern void objc_start_category_interface (tree, tree, tree); 909extern void objc_start_protocol (tree, tree); 910extern void objc_continue_interface (void); 911extern void objc_finish_interface (void); 912extern void objc_start_class_implementation (tree, tree); 913extern void objc_start_category_implementation (tree, tree); 914extern void objc_continue_implementation (void); 915extern void objc_finish_implementation (void); 916extern void objc_set_visibility (int); 917extern void objc_set_method_type (enum tree_code); 918extern tree objc_build_method_signature (tree, tree, tree, bool); 919extern void objc_add_method_declaration (tree); 920extern void objc_start_method_definition (tree); 921extern void objc_finish_method_definition (tree); 922extern void objc_add_instance_variable (tree); 923extern tree objc_build_keyword_decl (tree, tree, tree); 924extern tree objc_build_throw_stmt (tree); 925extern void objc_begin_try_stmt (location_t, tree); 926extern tree objc_finish_try_stmt (void); 927extern void objc_begin_catch_clause (tree); 928extern void objc_finish_catch_clause (void); 929extern void objc_build_finally_clause (location_t, tree); 930extern tree objc_build_synchronized (location_t, tree, tree); 931extern int objc_static_init_needed_p (void); 932extern tree objc_generate_static_init_call (tree); 933extern tree objc_generate_write_barrier (tree, enum tree_code, tree); 934 935/* The following are provided by the C and C++ front-ends, and called by 936 ObjC/ObjC++. */ 937extern void *objc_get_current_scope (void); 938extern void objc_mark_locals_volatile (void *); 939 940/* In c-ppoutput.c */ 941extern void init_pp_output (FILE *); 942extern void preprocess_file (cpp_reader *); 943extern void pp_file_change (const struct line_map *); 944extern void pp_dir_change (cpp_reader *, const char *); 945extern bool check_missing_format_attribute (tree, tree); 946 947/* In c-omp.c */ 948extern tree c_finish_omp_master (tree); 949extern tree c_finish_omp_critical (tree, tree); 950extern tree c_finish_omp_ordered (tree); 951extern void c_finish_omp_barrier (void); 952extern tree c_finish_omp_atomic (enum tree_code, tree, tree); 953extern void c_finish_omp_flush (void); 954extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree); 955extern void c_split_parallel_clauses (tree, tree *, tree *); 956extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree); 957 958/* Not in c-omp.c; provided by the front end. */ 959extern bool c_omp_sharing_predetermined (tree); 960extern tree c_omp_remap_decl (tree, bool); 961 962/* In order for the format checking to accept the C frontend 963 diagnostic framework extensions, you must include this file before 964 toplev.h, not after. The C front end formats are a subset of those 965 for C++, so they are the appropriate set to use in common code; 966 cp-tree.h overrides this for C++. */ 967#ifndef GCC_DIAG_STYLE 968#define GCC_DIAG_STYLE __gcc_cdiag__ 969#endif 970 971#endif /* ! GCC_C_COMMON_H */ 972