c-common.h revision 259947
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 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; 416 417 418/* C/ObjC language option variables. */ 419 420 421/* Nonzero means allow type mismatches in conditional expressions; 422 just make their values `void'. */ 423 424extern int flag_cond_mismatch; 425 426/* Nonzero means enable C89 Amendment 1 features. */ 427 428extern int flag_isoc94; 429 430/* Nonzero means use the ISO C99 dialect of C. */ 431 432extern int flag_isoc99; 433 434/* Nonzero means that we have builtin functions, and main is an int. */ 435 436extern int flag_hosted; 437 438/* Warn if main is suspicious. */ 439 440extern int warn_main; 441 442 443/* ObjC language option variables. */ 444 445 446/* Open and close the file for outputting class declarations, if 447 requested (ObjC). */ 448 449extern int flag_gen_declaration; 450 451/* Tells the compiler that this is a special run. Do not perform any 452 compiling, instead we are to test some platform dependent features 453 and output a C header file with appropriate definitions. */ 454 455extern int print_struct_values; 456 457/* ???. Undocumented. */ 458 459extern const char *constant_string_class_name; 460 461 462/* C++ language option variables. */ 463 464 465/* Nonzero means don't recognize any extension keywords. */ 466 467extern int flag_no_gnu_keywords; 468 469/* Nonzero means do emit exported implementations of functions even if 470 they can be inlined. */ 471 472extern int flag_implement_inlines; 473 474/* Nonzero means that implicit instantiations will be emitted if needed. */ 475 476extern int flag_implicit_templates; 477 478/* Nonzero means that implicit instantiations of inline templates will be 479 emitted if needed, even if instantiations of non-inline templates 480 aren't. */ 481 482extern int flag_implicit_inline_templates; 483 484/* Nonzero means generate separate instantiation control files and 485 juggle them at link time. */ 486 487extern int flag_use_repository; 488 489/* Nonzero if we want to issue diagnostics that the standard says are not 490 required. */ 491 492extern int flag_optional_diags; 493 494/* Nonzero means we should attempt to elide constructors when possible. */ 495 496extern int flag_elide_constructors; 497 498/* Nonzero means that member functions defined in class scope are 499 inline by default. */ 500 501extern int flag_default_inline; 502 503/* Controls whether compiler generates 'type descriptor' that give 504 run-time type information. */ 505 506extern int flag_rtti; 507 508/* Nonzero if we want to conserve space in the .o files. We do this 509 by putting uninitialized data and runtime initialized data into 510 .common instead of .data at the expense of not flagging multiple 511 definitions. */ 512 513extern int flag_conserve_space; 514 515/* Nonzero if we want to obey access control semantics. */ 516 517extern int flag_access_control; 518 519/* Nonzero if we want to check the return value of new and avoid calling 520 constructors if it is a null pointer. */ 521 522extern int flag_check_new; 523 524/* Nonzero if we want the new ISO rules for pushing a new scope for `for' 525 initialization variables. 526 0: Old rules, set by -fno-for-scope. 527 2: New ISO rules, set by -ffor-scope. 528 1: Try to implement new ISO rules, but with backup compatibility 529 (and warnings). This is the default, for now. */ 530 531extern int flag_new_for_scope; 532 533/* Nonzero if we want to emit defined symbols with common-like linkage as 534 weak symbols where possible, in order to conform to C++ semantics. 535 Otherwise, emit them as local symbols. */ 536 537extern int flag_weak; 538 539/* 0 means we want the preprocessor to not emit line directives for 540 the current working directory. 1 means we want it to do it. -1 541 means we should decide depending on whether debugging information 542 is being emitted or not. */ 543 544extern int flag_working_directory; 545 546/* Nonzero to use __cxa_atexit, rather than atexit, to register 547 destructors for local statics and global objects. */ 548 549extern int flag_use_cxa_atexit; 550 551/* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling 552 logic. */ 553 554extern int flag_use_cxa_get_exception_ptr; 555 556/* Nonzero means make the default pedwarns warnings instead of errors. 557 The value of this flag is ignored if -pedantic is specified. */ 558 559extern int flag_permissive; 560 561/* Nonzero means to implement standard semantics for exception 562 specifications, calling unexpected if an exception is thrown that 563 doesn't match the specification. Zero means to treat them as 564 assertions and optimize accordingly, but not check them. */ 565 566extern int flag_enforce_eh_specs; 567 568/* Nonzero (the default) means to generate thread-safe code for 569 initializing local statics. */ 570 571extern int flag_threadsafe_statics; 572 573/* Nonzero means warn about implicit declarations. */ 574 575extern int warn_implicit; 576 577/* Warn about using __null (as NULL in C++) as sentinel. For code compiled 578 with GCC this doesn't matter as __null is guaranteed to have the right 579 size. */ 580 581extern int warn_strict_null_sentinel; 582 583/* Maximum template instantiation depth. This limit is rather 584 arbitrary, but it exists to limit the time it takes to notice 585 infinite template instantiations. */ 586 587extern int max_tinst_depth; 588 589/* Nonzero means the expression being parsed will never be evaluated. 590 This is a count, since unevaluated expressions can nest. */ 591 592extern int skip_evaluation; 593 594/* C types are partitioned into three subsets: object, function, and 595 incomplete types. */ 596#define C_TYPE_OBJECT_P(type) \ 597 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type)) 598 599#define C_TYPE_INCOMPLETE_P(type) \ 600 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0) 601 602#define C_TYPE_FUNCTION_P(type) \ 603 (TREE_CODE (type) == FUNCTION_TYPE) 604 605/* For convenience we define a single macro to identify the class of 606 object or incomplete types. */ 607#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \ 608 (!C_TYPE_FUNCTION_P (type)) 609 610/* Attribute table common to the C front ends. */ 611extern const struct attribute_spec c_common_attribute_table[]; 612extern const struct attribute_spec c_common_format_attribute_table[]; 613 614/* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc. 615 ID is the identifier to use, NAME is the string. 616 TYPE_DEP indicates whether it depends on type of the function or not 617 (i.e. __PRETTY_FUNCTION__). */ 618 619extern tree (*make_fname_decl) (tree, int); 620 621extern tree identifier_global_value (tree); 622extern void record_builtin_type (enum rid, const char *, tree); 623extern tree build_void_list_node (void); 624extern void start_fname_decls (void); 625extern void finish_fname_decls (void); 626extern const char *fname_as_string (int); 627extern tree fname_decl (unsigned, tree); 628 629extern void check_function_arguments (tree, tree, tree); 630extern void check_function_arguments_recurse (void (*) 631 (void *, tree, 632 unsigned HOST_WIDE_INT), 633 void *, tree, 634 unsigned HOST_WIDE_INT); 635extern void check_function_format (tree, tree); 636extern void set_Wformat (int); 637extern tree handle_format_attribute (tree *, tree, tree, int, bool *); 638extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *); 639extern int c_common_handle_option (size_t code, const char *arg, int value); 640extern bool c_common_missing_argument (const char *opt, size_t code); 641extern tree c_common_type_for_mode (enum machine_mode, int); 642extern tree c_common_type_for_size (unsigned int, int); 643extern tree c_common_unsigned_type (tree); 644extern tree c_common_signed_type (tree); 645extern tree c_common_signed_or_unsigned_type (int, tree); 646extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int); 647extern tree c_common_truthvalue_conversion (tree); 648extern void c_apply_type_quals_to_decl (int, tree); 649extern tree c_sizeof_or_alignof_type (tree, bool, int); 650extern tree c_alignof_expr (tree); 651/* Print an error message for invalid operands to arith operation CODE. 652 NOP_EXPR is used as a special case (see truthvalue_conversion). */ 653extern void binary_op_error (enum tree_code, tree, tree); 654extern tree fix_string_type (tree); 655struct varray_head_tag; 656extern void constant_expression_warning (tree); 657extern bool strict_aliasing_warning (tree, tree, tree); 658extern void empty_body_warning (tree, tree); 659extern tree convert_and_check (tree, tree); 660extern void overflow_warning (tree); 661extern bool c_determine_visibility (tree); 662extern bool same_scalar_type_ignoring_signedness (tree, tree); 663 664#define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1) 665#define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1) 666 667/* Subroutine of build_binary_op, used for comparison operations. 668 See if the operands have both been converted from subword integer types 669 and, if so, perhaps change them both back to their original type. */ 670extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *); 671 672extern tree pointer_int_sum (enum tree_code, tree, tree); 673extern unsigned int min_precision (tree, int); 674 675/* Add qualifiers to a type, in the fashion for C. */ 676extern tree c_build_qualified_type (tree, int); 677 678/* Build tree nodes and builtin functions common to both C and C++ language 679 frontends. */ 680extern void c_common_nodes_and_builtins (void); 681 682extern void set_builtin_user_assembler_name (tree decl, const char *asmspec); 683 684extern void disable_builtin_function (const char *); 685 686extern void set_compound_literal_name (tree decl); 687 688extern tree build_va_arg (tree, tree); 689 690extern unsigned int c_common_init_options (unsigned int, const char **); 691extern bool c_common_post_options (const char **); 692extern bool c_common_init (void); 693extern void c_common_finish (void); 694extern void c_common_parse_file (int); 695extern HOST_WIDE_INT c_common_get_alias_set (tree); 696extern void c_register_builtin_type (tree, const char*); 697extern bool c_promoting_integer_type_p (tree); 698extern int self_promoting_args_p (tree); 699extern tree strip_array_types (tree); 700extern tree strip_pointer_operator (tree); 701extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT); 702 703/* This is the basic parsing function. */ 704extern void c_parse_file (void); 705/* This is misnamed, it actually performs end-of-compilation processing. */ 706extern void finish_file (void); 707 708 709/* These macros provide convenient access to the various _STMT nodes. */ 710 711/* Nonzero if a given STATEMENT_LIST represents the outermost binding 712 if a statement expression. */ 713#define STATEMENT_LIST_STMT_EXPR(NODE) \ 714 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE)) 715 716/* Nonzero if a label has been added to the statement list. */ 717#define STATEMENT_LIST_HAS_LABEL(NODE) \ 718 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE)) 719 720/* COMPOUND_LITERAL_EXPR accessors. */ 721#define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \ 722 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0) 723#define COMPOUND_LITERAL_EXPR_DECL(NODE) \ 724 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE)) 725 726#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM, 727 728enum c_tree_code { 729 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE, 730#include "c-common.def" 731 LAST_C_TREE_CODE 732}; 733 734#undef DEFTREECODE 735 736extern int anon_aggr_type_p (tree); 737 738/* For a VAR_DECL that is an anonymous union, these are the various 739 sub-variables that make up the anonymous union. */ 740#define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE)) 741 742/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */ 743#define DECL_C_BIT_FIELD(NODE) \ 744 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1) 745#define SET_DECL_C_BIT_FIELD(NODE) \ 746 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1) 747#define CLEAR_DECL_C_BIT_FIELD(NODE) \ 748 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0) 749 750extern void emit_local_var (tree); 751extern tree do_case (tree, tree); 752extern tree build_stmt (enum tree_code, ...); 753extern tree build_case_label (tree, tree, tree); 754 755/* These functions must be defined by each front-end which implements 756 a variant of the C language. They are used in c-common.c. */ 757 758extern tree build_unary_op (enum tree_code, tree, int); 759extern tree build_binary_op (enum tree_code, tree, tree, int); 760extern tree perform_integral_promotions (tree); 761 762/* These functions must be defined by each front-end which implements 763 a variant of the C language. They are used by port files. */ 764 765extern tree default_conversion (tree); 766 767/* Given two integer or real types, return the type for their sum. 768 Given two compatible ANSI C types, returns the merged type. */ 769 770extern tree common_type (tree, tree); 771 772extern tree decl_constant_value (tree); 773 774/* Handle increment and decrement of boolean types. */ 775extern tree boolean_increment (enum tree_code, tree); 776 777extern int case_compare (splay_tree_key, splay_tree_key); 778 779extern tree c_add_case_label (splay_tree, tree, tree, tree, tree); 780 781extern void c_do_switch_warnings (splay_tree, location_t, tree, tree); 782 783extern tree build_function_call (tree, tree); 784 785extern tree resolve_overloaded_builtin (tree, tree); 786 787extern tree finish_label_address_expr (tree); 788 789/* Same function prototype, but the C and C++ front ends have 790 different implementations. Used in c-common.c. */ 791extern tree lookup_label (tree); 792extern tree lookup_name (tree); 793 794extern int vector_types_convertible_p (tree t1, tree t2); 795 796extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *); 797 798extern tree c_staticp (tree); 799 800extern void init_c_lex (void); 801 802extern void c_cpp_builtins (cpp_reader *); 803 804/* Positive if an implicit `extern "C"' scope has just been entered; 805 negative if such a scope has just been exited. */ 806extern GTY(()) int pending_lang_change; 807 808/* Information recorded about each file examined during compilation. */ 809 810struct c_fileinfo 811{ 812 int time; /* Time spent in the file. */ 813 814 /* Flags used only by C++. 815 INTERFACE_ONLY nonzero means that we are in an "interface" section 816 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust 817 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and 818 INTERFACE_ONLY is zero, it means that we are responsible for 819 exporting definitions that others might need. */ 820 short interface_only; 821 short interface_unknown; 822}; 823 824struct c_fileinfo *get_fileinfo (const char *); 825extern void dump_time_statistics (void); 826 827extern bool c_dump_tree (void *, tree); 828 829extern void c_warn_unused_result (tree *); 830 831extern void verify_sequence_points (tree); 832 833extern tree fold_offsetof (tree, tree); 834 835/* Places where an lvalue, or modifiable lvalue, may be required. 836 Used to select diagnostic messages in lvalue_error and 837 readonly_error. */ 838enum lvalue_use { 839 lv_assign, 840 lv_increment, 841 lv_decrement, 842 lv_addressof, 843 lv_asm 844}; 845 846extern void lvalue_error (enum lvalue_use); 847 848extern int complete_array_type (tree *, tree, bool); 849 850extern tree builtin_type_for_size (int, bool); 851 852extern void warn_array_subscript_with_type_char (tree); 853extern void warn_about_parentheses (enum tree_code, enum tree_code, 854 enum tree_code); 855 856 857/* In c-gimplify.c */ 858extern void c_genericize (tree); 859extern int c_gimplify_expr (tree *, tree *, tree *); 860extern tree c_build_bind_expr (tree, tree); 861 862/* In c-pch.c */ 863extern void pch_init (void); 864extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd); 865extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd, 866 const char *orig); 867extern void c_common_write_pch (void); 868extern void c_common_no_more_pch (void); 869extern void c_common_pch_pragma (cpp_reader *pfile, const char *); 870extern void c_common_print_pch_checksum (FILE *f); 871 872/* In *-checksum.c */ 873extern const unsigned char executable_checksum[16]; 874 875extern void builtin_define_with_value (const char *, const char *, int); 876extern void c_stddef_cpp_builtins (void); 877extern void fe_file_change (const struct line_map *); 878extern void c_parse_error (const char *, enum cpp_ttype, tree); 879 880/* Objective-C / Objective-C++ entry points. */ 881 882/* The following ObjC/ObjC++ functions are called by the C and/or C++ 883 front-ends; they all must have corresponding stubs in stub-objc.c. */ 884extern tree objc_is_class_name (tree); 885extern tree objc_is_object_ptr (tree); 886extern void objc_check_decl (tree); 887extern int objc_is_reserved_word (tree); 888extern bool objc_compare_types (tree, tree, int, tree); 889extern void objc_volatilize_decl (tree); 890extern bool objc_type_quals_match (tree, tree); 891extern tree objc_rewrite_function_call (tree, tree); 892extern tree objc_message_selector (void); 893extern tree objc_lookup_ivar (tree, tree); 894extern void objc_clear_super_receiver (void); 895extern int objc_is_public (tree, tree); 896extern tree objc_is_id (tree); 897extern void objc_declare_alias (tree, tree); 898extern void objc_declare_class (tree); 899extern void objc_declare_protocols (tree); 900extern tree objc_build_message_expr (tree); 901extern tree objc_finish_message_expr (tree, tree, tree); 902extern tree objc_build_selector_expr (tree); 903extern tree objc_build_protocol_expr (tree); 904extern tree objc_build_encode_expr (tree); 905extern tree objc_build_string_object (tree); 906extern tree objc_get_protocol_qualified_type (tree, tree); 907extern tree objc_get_class_reference (tree); 908extern tree objc_get_class_ivars (tree); 909extern void objc_start_class_interface (tree, tree, tree); 910extern void objc_start_category_interface (tree, tree, tree); 911extern void objc_start_protocol (tree, tree); 912extern void objc_continue_interface (void); 913extern void objc_finish_interface (void); 914extern void objc_start_class_implementation (tree, tree); 915extern void objc_start_category_implementation (tree, tree); 916extern void objc_continue_implementation (void); 917extern void objc_finish_implementation (void); 918extern void objc_set_visibility (int); 919extern void objc_set_method_type (enum tree_code); 920extern tree objc_build_method_signature (tree, tree, tree, bool); 921extern void objc_add_method_declaration (tree); 922extern void objc_start_method_definition (tree); 923extern void objc_finish_method_definition (tree); 924extern void objc_add_instance_variable (tree); 925extern tree objc_build_keyword_decl (tree, tree, tree); 926extern tree objc_build_throw_stmt (tree); 927extern void objc_begin_try_stmt (location_t, tree); 928extern tree objc_finish_try_stmt (void); 929extern void objc_begin_catch_clause (tree); 930extern void objc_finish_catch_clause (void); 931extern void objc_build_finally_clause (location_t, tree); 932extern tree objc_build_synchronized (location_t, tree, tree); 933extern int objc_static_init_needed_p (void); 934extern tree objc_generate_static_init_call (tree); 935extern tree objc_generate_write_barrier (tree, enum tree_code, tree); 936 937/* The following are provided by the C and C++ front-ends, and called by 938 ObjC/ObjC++. */ 939extern void *objc_get_current_scope (void); 940extern void objc_mark_locals_volatile (void *); 941 942/* In c-ppoutput.c */ 943extern void init_pp_output (FILE *); 944extern void preprocess_file (cpp_reader *); 945extern void pp_file_change (const struct line_map *); 946extern void pp_dir_change (cpp_reader *, const char *); 947extern bool check_missing_format_attribute (tree, tree); 948 949/* In c-omp.c */ 950extern tree c_finish_omp_master (tree); 951extern tree c_finish_omp_critical (tree, tree); 952extern tree c_finish_omp_ordered (tree); 953extern void c_finish_omp_barrier (void); 954extern tree c_finish_omp_atomic (enum tree_code, tree, tree); 955extern void c_finish_omp_flush (void); 956extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree); 957extern void c_split_parallel_clauses (tree, tree *, tree *); 958extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree); 959 960/* Not in c-omp.c; provided by the front end. */ 961extern bool c_omp_sharing_predetermined (tree); 962extern tree c_omp_remap_decl (tree, bool); 963 964/* In order for the format checking to accept the C frontend 965 diagnostic framework extensions, you must include this file before 966 toplev.h, not after. The C front end formats are a subset of those 967 for C++, so they are the appropriate set to use in common code; 968 cp-tree.h overrides this for C++. */ 969#ifndef GCC_DIAG_STYLE 970#define GCC_DIAG_STYLE __gcc_cdiag__ 971#endif 972 973#endif /* ! GCC_C_COMMON_H */ 974