c-common.h revision 260074
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 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 implicit conversions between vectors with 393 differing numbers of subparts and/or differing element types. */ 394extern int flag_lax_vector_conversions; 395 396/* Nonzero means allow Microsoft extensions without warnings or errors. */ 397extern int flag_ms_extensions; 398 399/* Nonzero means don't recognize the keyword `asm'. */ 400 401extern int flag_no_asm; 402 403/* Nonzero means give string constants the type `const char *', as mandated 404 by the standard. */ 405 406extern int flag_const_strings; 407 408/* Nonzero means to treat bitfields as signed unless they say `unsigned'. */ 409 410extern int flag_signed_bitfields; 411 412/* Warn about #pragma directives that are not recognized. */ 413 414extern int warn_unknown_pragmas; /* Tri state variable. */ 415 416/* Warn about format/argument anomalies in calls to formatted I/O functions 417 (*printf, *scanf, strftime, strfmon, etc.). */ 418 419extern int warn_format; 420 421 422/* C/ObjC language option variables. */ 423 424 425/* Nonzero means allow type mismatches in conditional expressions; 426 just make their values `void'. */ 427 428extern int flag_cond_mismatch; 429 430/* Nonzero means enable C89 Amendment 1 features. */ 431 432extern int flag_isoc94; 433 434/* Nonzero means use the ISO C99 dialect of C. */ 435 436extern int flag_isoc99; 437 438/* Nonzero means that we have builtin functions, and main is an int. */ 439 440extern int flag_hosted; 441 442/* Warn if main is suspicious. */ 443 444extern int warn_main; 445 446 447/* ObjC language option variables. */ 448 449 450/* Open and close the file for outputting class declarations, if 451 requested (ObjC). */ 452 453extern int flag_gen_declaration; 454 455/* Tells the compiler that this is a special run. Do not perform any 456 compiling, instead we are to test some platform dependent features 457 and output a C header file with appropriate definitions. */ 458 459extern int print_struct_values; 460 461/* ???. Undocumented. */ 462 463extern const char *constant_string_class_name; 464 465 466/* C++ language option variables. */ 467 468 469/* Nonzero means don't recognize any extension keywords. */ 470 471extern int flag_no_gnu_keywords; 472 473/* Nonzero means do emit exported implementations of functions even if 474 they can be inlined. */ 475 476extern int flag_implement_inlines; 477 478/* Nonzero means that implicit instantiations will be emitted if needed. */ 479 480extern int flag_implicit_templates; 481 482/* Nonzero means that implicit instantiations of inline templates will be 483 emitted if needed, even if instantiations of non-inline templates 484 aren't. */ 485 486extern int flag_implicit_inline_templates; 487 488/* Nonzero means generate separate instantiation control files and 489 juggle them at link time. */ 490 491extern int flag_use_repository; 492 493/* Nonzero if we want to issue diagnostics that the standard says are not 494 required. */ 495 496extern int flag_optional_diags; 497 498/* Nonzero means we should attempt to elide constructors when possible. */ 499 500extern int flag_elide_constructors; 501 502/* Nonzero means that member functions defined in class scope are 503 inline by default. */ 504 505extern int flag_default_inline; 506 507/* Controls whether compiler generates 'type descriptor' that give 508 run-time type information. */ 509 510extern int flag_rtti; 511 512/* Nonzero if we want to conserve space in the .o files. We do this 513 by putting uninitialized data and runtime initialized data into 514 .common instead of .data at the expense of not flagging multiple 515 definitions. */ 516 517extern int flag_conserve_space; 518 519/* Nonzero if we want to obey access control semantics. */ 520 521extern int flag_access_control; 522 523/* Nonzero if we want to check the return value of new and avoid calling 524 constructors if it is a null pointer. */ 525 526extern int flag_check_new; 527 528/* Nonzero if we want the new ISO rules for pushing a new scope for `for' 529 initialization variables. 530 0: Old rules, set by -fno-for-scope. 531 2: New ISO rules, set by -ffor-scope. 532 1: Try to implement new ISO rules, but with backup compatibility 533 (and warnings). This is the default, for now. */ 534 535extern int flag_new_for_scope; 536 537/* Nonzero if we want to emit defined symbols with common-like linkage as 538 weak symbols where possible, in order to conform to C++ semantics. 539 Otherwise, emit them as local symbols. */ 540 541extern int flag_weak; 542 543/* 0 means we want the preprocessor to not emit line directives for 544 the current working directory. 1 means we want it to do it. -1 545 means we should decide depending on whether debugging information 546 is being emitted or not. */ 547 548extern int flag_working_directory; 549 550/* Nonzero to use __cxa_atexit, rather than atexit, to register 551 destructors for local statics and global objects. */ 552 553extern int flag_use_cxa_atexit; 554 555/* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling 556 logic. */ 557 558extern int flag_use_cxa_get_exception_ptr; 559 560/* Nonzero means make the default pedwarns warnings instead of errors. 561 The value of this flag is ignored if -pedantic is specified. */ 562 563extern int flag_permissive; 564 565/* Nonzero means to implement standard semantics for exception 566 specifications, calling unexpected if an exception is thrown that 567 doesn't match the specification. Zero means to treat them as 568 assertions and optimize accordingly, but not check them. */ 569 570extern int flag_enforce_eh_specs; 571 572/* Nonzero (the default) means to generate thread-safe code for 573 initializing local statics. */ 574 575extern int flag_threadsafe_statics; 576 577/* Nonzero means warn about implicit declarations. */ 578 579extern int warn_implicit; 580 581/* Warn about using __null (as NULL in C++) as sentinel. For code compiled 582 with GCC this doesn't matter as __null is guaranteed to have the right 583 size. */ 584 585extern int warn_strict_null_sentinel; 586 587/* Maximum template instantiation depth. This limit is rather 588 arbitrary, but it exists to limit the time it takes to notice 589 infinite template instantiations. */ 590 591extern int max_tinst_depth; 592 593/* Nonzero means the expression being parsed will never be evaluated. 594 This is a count, since unevaluated expressions can nest. */ 595 596extern int skip_evaluation; 597 598/* C types are partitioned into three subsets: object, function, and 599 incomplete types. */ 600#define C_TYPE_OBJECT_P(type) \ 601 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type)) 602 603#define C_TYPE_INCOMPLETE_P(type) \ 604 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0) 605 606#define C_TYPE_FUNCTION_P(type) \ 607 (TREE_CODE (type) == FUNCTION_TYPE) 608 609/* For convenience we define a single macro to identify the class of 610 object or incomplete types. */ 611#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \ 612 (!C_TYPE_FUNCTION_P (type)) 613 614/* Attribute table common to the C front ends. */ 615extern const struct attribute_spec c_common_attribute_table[]; 616extern const struct attribute_spec c_common_format_attribute_table[]; 617 618/* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc. 619 ID is the identifier to use, NAME is the string. 620 TYPE_DEP indicates whether it depends on type of the function or not 621 (i.e. __PRETTY_FUNCTION__). */ 622 623extern tree (*make_fname_decl) (tree, int); 624 625extern tree identifier_global_value (tree); 626extern void record_builtin_type (enum rid, const char *, tree); 627extern tree build_void_list_node (void); 628extern void start_fname_decls (void); 629extern void finish_fname_decls (void); 630extern const char *fname_as_string (int); 631extern tree fname_decl (unsigned, tree); 632 633extern void check_function_arguments (tree, tree, tree); 634extern void check_function_arguments_recurse (void (*) 635 (void *, tree, 636 unsigned HOST_WIDE_INT), 637 void *, tree, 638 unsigned HOST_WIDE_INT); 639extern void check_function_format (tree, tree); 640extern void set_Wformat (int); 641extern tree handle_format_attribute (tree *, tree, tree, int, bool *); 642extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *); 643extern int c_common_handle_option (size_t code, const char *arg, int value); 644extern bool c_common_missing_argument (const char *opt, size_t code); 645extern tree c_common_type_for_mode (enum machine_mode, int); 646extern tree c_common_type_for_size (unsigned int, int); 647extern tree c_common_unsigned_type (tree); 648extern tree c_common_signed_type (tree); 649extern tree c_common_signed_or_unsigned_type (int, tree); 650extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int); 651extern tree c_common_truthvalue_conversion (tree); 652extern void c_apply_type_quals_to_decl (int, tree); 653extern tree c_sizeof_or_alignof_type (tree, bool, int); 654extern tree c_alignof_expr (tree); 655/* Print an error message for invalid operands to arith operation CODE. 656 NOP_EXPR is used as a special case (see truthvalue_conversion). */ 657extern void binary_op_error (enum tree_code, tree, tree); 658extern tree fix_string_type (tree); 659struct varray_head_tag; 660extern void constant_expression_warning (tree); 661extern bool strict_aliasing_warning (tree, tree, tree); 662extern void empty_body_warning (tree, tree); 663extern tree convert_and_check (tree, tree); 664extern void overflow_warning (tree); 665extern bool c_determine_visibility (tree); 666extern bool same_scalar_type_ignoring_signedness (tree, tree); 667 668#define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1) 669#define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1) 670 671/* Subroutine of build_binary_op, used for comparison operations. 672 See if the operands have both been converted from subword integer types 673 and, if so, perhaps change them both back to their original type. */ 674extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *); 675 676extern tree pointer_int_sum (enum tree_code, tree, tree); 677extern unsigned int min_precision (tree, int); 678 679/* Add qualifiers to a type, in the fashion for C. */ 680extern tree c_build_qualified_type (tree, int); 681 682/* Build tree nodes and builtin functions common to both C and C++ language 683 frontends. */ 684extern void c_common_nodes_and_builtins (void); 685 686extern void set_builtin_user_assembler_name (tree decl, const char *asmspec); 687 688extern void disable_builtin_function (const char *); 689 690extern void set_compound_literal_name (tree decl); 691 692extern tree build_va_arg (tree, tree); 693 694extern unsigned int c_common_init_options (unsigned int, const char **); 695extern bool c_common_post_options (const char **); 696extern bool c_common_init (void); 697extern void c_common_finish (void); 698extern void c_common_parse_file (int); 699extern HOST_WIDE_INT c_common_get_alias_set (tree); 700extern void c_register_builtin_type (tree, const char*); 701extern bool c_promoting_integer_type_p (tree); 702extern int self_promoting_args_p (tree); 703extern tree strip_array_types (tree); 704extern tree strip_pointer_operator (tree); 705extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT); 706 707/* This is the basic parsing function. */ 708extern void c_parse_file (void); 709/* This is misnamed, it actually performs end-of-compilation processing. */ 710extern void finish_file (void); 711 712 713/* These macros provide convenient access to the various _STMT nodes. */ 714 715/* Nonzero if a given STATEMENT_LIST represents the outermost binding 716 if a statement expression. */ 717#define STATEMENT_LIST_STMT_EXPR(NODE) \ 718 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE)) 719 720/* Nonzero if a label has been added to the statement list. */ 721#define STATEMENT_LIST_HAS_LABEL(NODE) \ 722 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE)) 723 724/* COMPOUND_LITERAL_EXPR accessors. */ 725#define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \ 726 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0) 727#define COMPOUND_LITERAL_EXPR_DECL(NODE) \ 728 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE)) 729 730#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM, 731 732enum c_tree_code { 733 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE, 734#include "c-common.def" 735 LAST_C_TREE_CODE 736}; 737 738#undef DEFTREECODE 739 740extern int anon_aggr_type_p (tree); 741 742/* For a VAR_DECL that is an anonymous union, these are the various 743 sub-variables that make up the anonymous union. */ 744#define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE)) 745 746/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */ 747#define DECL_C_BIT_FIELD(NODE) \ 748 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1) 749#define SET_DECL_C_BIT_FIELD(NODE) \ 750 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1) 751#define CLEAR_DECL_C_BIT_FIELD(NODE) \ 752 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0) 753 754extern void emit_local_var (tree); 755extern tree do_case (tree, tree); 756extern tree build_stmt (enum tree_code, ...); 757extern tree build_case_label (tree, tree, tree); 758 759/* These functions must be defined by each front-end which implements 760 a variant of the C language. They are used in c-common.c. */ 761 762extern tree build_unary_op (enum tree_code, tree, int); 763extern tree build_binary_op (enum tree_code, tree, tree, int); 764extern tree perform_integral_promotions (tree); 765 766/* These functions must be defined by each front-end which implements 767 a variant of the C language. They are used by port files. */ 768 769extern tree default_conversion (tree); 770 771/* Given two integer or real types, return the type for their sum. 772 Given two compatible ANSI C types, returns the merged type. */ 773 774extern tree common_type (tree, tree); 775 776extern tree decl_constant_value (tree); 777 778/* Handle increment and decrement of boolean types. */ 779extern tree boolean_increment (enum tree_code, tree); 780 781extern int case_compare (splay_tree_key, splay_tree_key); 782 783extern tree c_add_case_label (splay_tree, tree, tree, tree, tree); 784 785extern void c_do_switch_warnings (splay_tree, location_t, tree, tree); 786 787extern tree build_function_call (tree, tree); 788 789extern tree resolve_overloaded_builtin (tree, tree); 790 791extern tree finish_label_address_expr (tree); 792 793/* Same function prototype, but the C and C++ front ends have 794 different implementations. Used in c-common.c. */ 795extern tree lookup_label (tree); 796extern tree lookup_name (tree); 797 798extern bool vector_types_convertible_p (tree t1, tree t2, bool emit_lax_note); 799 800extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *); 801 802extern tree c_staticp (tree); 803 804extern void init_c_lex (void); 805 806extern void c_cpp_builtins (cpp_reader *); 807 808/* Positive if an implicit `extern "C"' scope has just been entered; 809 negative if such a scope has just been exited. */ 810extern GTY(()) int pending_lang_change; 811 812/* Information recorded about each file examined during compilation. */ 813 814struct c_fileinfo 815{ 816 int time; /* Time spent in the file. */ 817 818 /* Flags used only by C++. 819 INTERFACE_ONLY nonzero means that we are in an "interface" section 820 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust 821 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and 822 INTERFACE_ONLY is zero, it means that we are responsible for 823 exporting definitions that others might need. */ 824 short interface_only; 825 short interface_unknown; 826}; 827 828struct c_fileinfo *get_fileinfo (const char *); 829extern void dump_time_statistics (void); 830 831extern bool c_dump_tree (void *, tree); 832 833extern void c_warn_unused_result (tree *); 834 835extern void verify_sequence_points (tree); 836 837extern tree fold_offsetof (tree, tree); 838 839/* Places where an lvalue, or modifiable lvalue, may be required. 840 Used to select diagnostic messages in lvalue_error and 841 readonly_error. */ 842enum lvalue_use { 843 lv_assign, 844 lv_increment, 845 lv_decrement, 846 lv_addressof, 847 lv_asm 848}; 849 850extern void lvalue_error (enum lvalue_use); 851 852extern int complete_array_type (tree *, tree, bool); 853 854extern tree builtin_type_for_size (int, bool); 855 856extern void warn_array_subscript_with_type_char (tree); 857extern void warn_about_parentheses (enum tree_code, enum tree_code, 858 enum tree_code); 859 860 861/* In c-gimplify.c */ 862extern void c_genericize (tree); 863extern int c_gimplify_expr (tree *, tree *, tree *); 864extern tree c_build_bind_expr (tree, tree); 865 866/* In c-pch.c */ 867extern void pch_init (void); 868extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd); 869extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd, 870 const char *orig); 871extern void c_common_write_pch (void); 872extern void c_common_no_more_pch (void); 873extern void c_common_pch_pragma (cpp_reader *pfile, const char *); 874extern void c_common_print_pch_checksum (FILE *f); 875 876/* In *-checksum.c */ 877extern const unsigned char executable_checksum[16]; 878 879extern void builtin_define_with_value (const char *, const char *, int); 880extern void c_stddef_cpp_builtins (void); 881extern void fe_file_change (const struct line_map *); 882extern void c_parse_error (const char *, enum cpp_ttype, tree); 883 884/* Objective-C / Objective-C++ entry points. */ 885 886/* The following ObjC/ObjC++ functions are called by the C and/or C++ 887 front-ends; they all must have corresponding stubs in stub-objc.c. */ 888extern tree objc_is_class_name (tree); 889extern tree objc_is_object_ptr (tree); 890extern void objc_check_decl (tree); 891extern int objc_is_reserved_word (tree); 892extern bool objc_compare_types (tree, tree, int, tree); 893extern void objc_volatilize_decl (tree); 894extern bool objc_type_quals_match (tree, tree); 895extern tree objc_rewrite_function_call (tree, tree); 896extern tree objc_message_selector (void); 897extern tree objc_lookup_ivar (tree, tree); 898extern void objc_clear_super_receiver (void); 899extern int objc_is_public (tree, tree); 900extern tree objc_is_id (tree); 901extern void objc_declare_alias (tree, tree); 902extern void objc_declare_class (tree); 903extern void objc_declare_protocols (tree); 904extern tree objc_build_message_expr (tree); 905extern tree objc_finish_message_expr (tree, tree, tree); 906extern tree objc_build_selector_expr (tree); 907extern tree objc_build_protocol_expr (tree); 908extern tree objc_build_encode_expr (tree); 909extern tree objc_build_string_object (tree); 910extern tree objc_get_protocol_qualified_type (tree, tree); 911extern tree objc_get_class_reference (tree); 912extern tree objc_get_class_ivars (tree); 913extern void objc_start_class_interface (tree, tree, tree); 914extern void objc_start_category_interface (tree, tree, tree); 915extern void objc_start_protocol (tree, tree); 916extern void objc_continue_interface (void); 917extern void objc_finish_interface (void); 918extern void objc_start_class_implementation (tree, tree); 919extern void objc_start_category_implementation (tree, tree); 920extern void objc_continue_implementation (void); 921extern void objc_finish_implementation (void); 922extern void objc_set_visibility (int); 923extern void objc_set_method_type (enum tree_code); 924extern tree objc_build_method_signature (tree, tree, tree, bool); 925extern void objc_add_method_declaration (tree); 926extern void objc_start_method_definition (tree); 927extern void objc_finish_method_definition (tree); 928extern void objc_add_instance_variable (tree); 929extern tree objc_build_keyword_decl (tree, tree, tree); 930extern tree objc_build_throw_stmt (tree); 931extern void objc_begin_try_stmt (location_t, tree); 932extern tree objc_finish_try_stmt (void); 933extern void objc_begin_catch_clause (tree); 934extern void objc_finish_catch_clause (void); 935extern void objc_build_finally_clause (location_t, tree); 936extern tree objc_build_synchronized (location_t, tree, tree); 937extern int objc_static_init_needed_p (void); 938extern tree objc_generate_static_init_call (tree); 939extern tree objc_generate_write_barrier (tree, enum tree_code, tree); 940 941/* The following are provided by the C and C++ front-ends, and called by 942 ObjC/ObjC++. */ 943extern void *objc_get_current_scope (void); 944extern void objc_mark_locals_volatile (void *); 945 946/* In c-ppoutput.c */ 947extern void init_pp_output (FILE *); 948extern void preprocess_file (cpp_reader *); 949extern void pp_file_change (const struct line_map *); 950extern void pp_dir_change (cpp_reader *, const char *); 951extern bool check_missing_format_attribute (tree, tree); 952 953/* In c-omp.c */ 954extern tree c_finish_omp_master (tree); 955extern tree c_finish_omp_critical (tree, tree); 956extern tree c_finish_omp_ordered (tree); 957extern void c_finish_omp_barrier (void); 958extern tree c_finish_omp_atomic (enum tree_code, tree, tree); 959extern void c_finish_omp_flush (void); 960extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree); 961extern void c_split_parallel_clauses (tree, tree *, tree *); 962extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree); 963 964/* Not in c-omp.c; provided by the front end. */ 965extern bool c_omp_sharing_predetermined (tree); 966extern tree c_omp_remap_decl (tree, bool); 967 968/* In order for the format checking to accept the C frontend 969 diagnostic framework extensions, you must include this file before 970 toplev.h, not after. The C front end formats are a subset of those 971 for C++, so they are the appropriate set to use in common code; 972 cp-tree.h overrides this for C++. */ 973#ifndef GCC_DIAG_STYLE 974#define GCC_DIAG_STYLE __gcc_cdiag__ 975#endif 976 977#endif /* ! GCC_C_COMMON_H */ 978