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.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 #ifndef GCC_C_COMMON_H
23 #define GCC_C_COMMON_H
25 #include "splay-tree.h"
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 STMT_EXPR_NO_SCOPE (in STMT_EXPR)
34 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
35 STMT_IS_FULL_EXPR_P (in _STMT)
36 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
38 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
42 /* Reserved identifiers. This is the union of all the keywords for C,
43 C++, and Objective-C. All the type modifiers have to be in one
44 block at the beginning, because they are used as mask bits. There
45 are 27 type modifiers; if we add many more we will have to redesign
46 the mask mechanism. */
51 /* C, in empirical order of frequency. */
53 RID_UNSIGNED
, RID_LONG
, RID_CONST
, RID_EXTERN
,
54 RID_REGISTER
, RID_TYPEDEF
, RID_SHORT
, RID_INLINE
,
55 RID_VOLATILE
, RID_SIGNED
, RID_AUTO
, RID_RESTRICT
,
58 RID_COMPLEX
, RID_THREAD
,
61 RID_FRIEND
, RID_VIRTUAL
, RID_EXPLICIT
, RID_EXPORT
, RID_MUTABLE
,
64 RID_IN
, RID_OUT
, RID_INOUT
, RID_BYCOPY
, RID_BYREF
, RID_ONEWAY
,
67 RID_INT
, RID_CHAR
, RID_FLOAT
, RID_DOUBLE
, RID_VOID
,
68 RID_ENUM
, RID_STRUCT
, RID_UNION
, RID_IF
, RID_ELSE
,
69 RID_WHILE
, RID_DO
, RID_FOR
, RID_SWITCH
, RID_CASE
,
70 RID_DEFAULT
, RID_BREAK
, RID_CONTINUE
, RID_RETURN
, RID_GOTO
,
74 RID_ASM
, RID_TYPEOF
, RID_ALIGNOF
, RID_ATTRIBUTE
, RID_VA_ARG
,
75 RID_EXTENSION
, RID_IMAGPART
, RID_REALPART
, RID_LABEL
, RID_CHOOSE_EXPR
,
76 RID_TYPES_COMPATIBLE_P
,
78 /* Too many ways of getting the name of a function as a string */
79 RID_FUNCTION_NAME
, RID_PRETTY_FUNCTION_NAME
, RID_C99_FUNCTION_NAME
,
82 RID_BOOL
, RID_WCHAR
, RID_CLASS
,
83 RID_PUBLIC
, RID_PRIVATE
, RID_PROTECTED
,
84 RID_TEMPLATE
, RID_NULL
, RID_CATCH
,
85 RID_DELETE
, RID_FALSE
, RID_NAMESPACE
,
86 RID_NEW
, RID_OFFSETOF
, RID_OPERATOR
,
87 RID_THIS
, RID_THROW
, RID_TRUE
,
88 RID_TRY
, RID_TYPENAME
, RID_TYPEID
,
92 RID_CONSTCAST
, RID_DYNCAST
, RID_REINTCAST
, RID_STATCAST
,
95 RID_AT_ENCODE
, RID_AT_END
,
96 RID_AT_CLASS
, RID_AT_ALIAS
, RID_AT_DEFS
,
97 RID_AT_PRIVATE
, RID_AT_PROTECTED
, RID_AT_PUBLIC
,
98 RID_AT_PROTOCOL
, RID_AT_SELECTOR
,
99 RID_AT_THROW
, RID_AT_TRY
, RID_AT_CATCH
,
100 RID_AT_FINALLY
, RID_AT_SYNCHRONIZED
,
102 RID_AT_IMPLEMENTATION
,
106 RID_FIRST_MODIFIER
= RID_STATIC
,
107 RID_LAST_MODIFIER
= RID_ONEWAY
,
109 RID_FIRST_AT
= RID_AT_ENCODE
,
110 RID_LAST_AT
= RID_AT_IMPLEMENTATION
,
111 RID_FIRST_PQ
= RID_IN
,
112 RID_LAST_PQ
= RID_ONEWAY
115 #define OBJC_IS_AT_KEYWORD(rid) \
116 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
117 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
119 #define OBJC_IS_PQ_KEYWORD(rid) \
120 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
121 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
123 /* The elements of `ridpointers' are identifier nodes for the reserved
124 type names and storage classes. It is indexed by a RID_... value. */
125 extern GTY ((length ("(int) RID_MAX"))) tree
*ridpointers
;
127 /* Standard named or nameless data types of the C compiler. */
132 CTI_SIGNED_WCHAR_TYPE
,
133 CTI_UNSIGNED_WCHAR_TYPE
,
135 CTI_SIGNED_SIZE_TYPE
, /* For format checking only. */
136 CTI_UNSIGNED_PTRDIFF_TYPE
, /* For format checking only. */
139 CTI_WIDEST_INT_LIT_TYPE
,
140 CTI_WIDEST_UINT_LIT_TYPE
,
143 CTI_WCHAR_ARRAY_TYPE
,
146 CTI_CONST_STRING_TYPE
,
148 /* Type for boolean expressions (bool in C++, int in C). */
151 CTI_TRUTHVALUE_FALSE
,
153 CTI_DEFAULT_FUNCTION_TYPE
,
155 /* These are not types, but we have to look them up all the time. */
156 CTI_FUNCTION_NAME_DECL
,
157 CTI_PRETTY_FUNCTION_NAME_DECL
,
158 CTI_C99_FUNCTION_NAME_DECL
,
159 CTI_SAVED_FUNCTION_NAME_DECLS
,
166 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
168 /* Identifier part common to the C front ends. Inherits from
169 tree_identifier, despite appearances. */
170 struct c_common_identifier
GTY(())
172 struct tree_common common
;
173 struct cpp_hashnode node
;
176 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
177 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
178 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
179 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
180 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
181 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
182 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
183 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
184 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
185 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
187 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
188 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
189 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
191 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
192 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
193 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
194 #define string_type_node c_global_trees[CTI_STRING_TYPE]
195 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
197 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
199 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
200 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
201 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
202 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
204 /* A node for `((void) 0)'. */
205 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
207 extern GTY(()) tree c_global_trees
[CTI_MAX
];
209 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
210 tree for size reasons. */
211 struct sorted_fields_type
GTY(())
214 tree
GTY((length ("%h.len"))) elts
[1];
217 /* Mark which labels are explicitly declared.
218 These may be shadowed, and may be referenced from nested functions. */
219 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
221 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
222 warning if they undergo concatenation. */
223 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
225 typedef enum c_language_kind
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. */
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. */
236 extern c_language_kind c_language
;
238 #define c_dialect_cxx() (c_language & clk_cxx)
239 #define c_dialect_objc() (c_language & clk_objc)
241 /* Information about a statement tree. */
243 struct stmt_tree_s
GTY(()) {
244 /* The current statement list being collected. */
245 tree x_cur_stmt_list
;
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
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.
260 This flag has no effect in C. */
261 int stmts_are_full_exprs_p
;
264 typedef struct stmt_tree_s
*stmt_tree
;
266 /* Global state pertinent to the current function. Some C dialects
267 extend this structure with additional fields. */
269 struct 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
;
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
279 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
281 /* Language-specific hooks. */
283 /* Callback that determines if it's ok for a function to have no
284 noreturn attribute. */
285 extern int (*lang_missing_noreturn_ok_p
) (tree
);
287 /* If non-NULL, this function is called after a precompile header file
289 extern void (*lang_post_pch_load
) (void);
291 extern void push_file_scope (void);
292 extern void pop_file_scope (void);
293 extern int yyparse (void);
294 extern stmt_tree
current_stmt_tree (void);
295 extern tree
push_stmt_list (void);
296 extern tree
pop_stmt_list (tree
);
297 extern tree
add_stmt (tree
);
298 extern void push_cleanup (tree
, tree
, bool);
300 extern int c_expand_decl (tree
);
302 extern int field_decl_cmp (const void *, const void *);
303 extern void resort_sorted_fields (void *, void *, gt_pointer_operator
,
305 extern bool has_c_linkage (tree decl
);
307 /* Switches common to the C front ends. */
309 /* Nonzero if prepreprocessing only. */
311 extern int flag_preprocess_only
;
313 /* Zero means that faster, ...NonNil variants of objc_msgSend...
314 calls will be used in ObjC; passing nil receivers to such calls
315 will most likely result in crashes. */
316 extern int flag_nil_receivers
;
318 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
319 @try, etc.) in source code. */
320 extern int flag_objc_exceptions
;
322 /* Nonzero means that we generate NeXT setjmp based exceptions. */
323 extern int flag_objc_sjlj_exceptions
;
325 /* Nonzero means that code generation will be altered to support
326 "zero-link" execution. This currently affects ObjC only, but may
327 affect other languages in the future. */
328 extern int flag_zero_link
;
330 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
331 unit. It will inform the ObjC runtime that class definition(s) herein
332 contained are to replace one(s) previously loaded. */
333 extern int flag_replace_objc_classes
;
335 /* Nonzero means don't output line number information. */
337 extern char flag_no_line_commands
;
339 /* Nonzero causes -E output not to be done, but directives such as
340 #define that have side effects are still obeyed. */
342 extern char flag_no_output
;
344 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
345 'N' of the command line switch. */
347 extern char flag_dump_macros
;
349 /* Nonzero means pass #include lines through to the output. */
351 extern char flag_dump_includes
;
353 /* Nonzero means process PCH files while preprocessing. */
355 extern bool flag_pch_preprocess
;
357 /* The file name to which we should write a precompiled header, or
358 NULL if no header will be written in this compile. */
360 extern const char *pch_file
;
362 /* Nonzero if an ISO standard was selected. It rejects macros in the
367 /* Nonzero if -undef was given. It suppresses target built-in macros
370 extern int flag_undef
;
372 /* Nonzero means don't recognize the non-ANSI builtin functions. */
374 extern int flag_no_builtin
;
376 /* Nonzero means don't recognize the non-ANSI builtin functions.
379 extern int flag_no_nonansi_builtin
;
381 /* Nonzero means give `double' the same size as `float'. */
383 extern int flag_short_double
;
385 /* Nonzero means give `wchar_t' the same size as `short'. */
387 extern int flag_short_wchar
;
389 /* Nonzero means allow Microsoft extensions without warnings or errors. */
390 extern int flag_ms_extensions
;
392 /* Nonzero means don't recognize the keyword `asm'. */
394 extern int flag_no_asm
;
396 /* Nonzero means give string constants the type `const char *', as mandated
399 extern int flag_const_strings
;
401 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
403 extern int flag_signed_bitfields
;
405 /* Nonzero means warn about deprecated conversion from string constant to
408 extern int warn_write_strings
;
410 /* Warn about #pragma directives that are not recognized. */
412 extern int warn_unknown_pragmas
; /* Tri state variable. */
414 /* Warn about format/argument anomalies in calls to formatted I/O functions
415 (*printf, *scanf, strftime, strfmon, etc.). */
417 extern int warn_format
;
420 /* C/ObjC language option variables. */
423 /* Nonzero means allow type mismatches in conditional expressions;
424 just make their values `void'. */
426 extern int flag_cond_mismatch
;
428 /* Nonzero means enable C89 Amendment 1 features. */
430 extern int flag_isoc94
;
432 /* Nonzero means use the ISO C99 dialect of C. */
434 extern int flag_isoc99
;
436 /* Nonzero means that we have builtin functions, and main is an int. */
438 extern int flag_hosted
;
440 /* Warn if main is suspicious. */
442 extern int warn_main
;
445 /* ObjC language option variables. */
448 /* Open and close the file for outputting class declarations, if
451 extern int flag_gen_declaration
;
453 /* Generate code for GNU or NeXT runtime environment. */
455 extern int flag_next_runtime
;
457 /* Tells the compiler that this is a special run. Do not perform any
458 compiling, instead we are to test some platform dependent features
459 and output a C header file with appropriate definitions. */
461 extern int print_struct_values
;
463 /* ???. Undocumented. */
465 extern const char *constant_string_class_name
;
468 /* C++ language option variables. */
471 /* Nonzero means don't recognize any extension keywords. */
473 extern int flag_no_gnu_keywords
;
475 /* Nonzero means do emit exported implementations of functions even if
476 they can be inlined. */
478 extern int flag_implement_inlines
;
480 /* Nonzero means that implicit instantiations will be emitted if needed. */
482 extern int flag_implicit_templates
;
484 /* Nonzero means that implicit instantiations of inline templates will be
485 emitted if needed, even if instantiations of non-inline templates
488 extern int flag_implicit_inline_templates
;
490 /* Nonzero means generate separate instantiation control files and
491 juggle them at link time. */
493 extern int flag_use_repository
;
495 /* Nonzero if we want to issue diagnostics that the standard says are not
498 extern int flag_optional_diags
;
500 /* Nonzero means we should attempt to elide constructors when possible. */
502 extern int flag_elide_constructors
;
504 /* Nonzero means that member functions defined in class scope are
505 inline by default. */
507 extern int flag_default_inline
;
509 /* Controls whether compiler generates 'type descriptor' that give
510 run-time type information. */
512 extern int flag_rtti
;
514 /* Nonzero if we want to conserve space in the .o files. We do this
515 by putting uninitialized data and runtime initialized data into
516 .common instead of .data at the expense of not flagging multiple
519 extern int flag_conserve_space
;
521 /* Nonzero if we want to obey access control semantics. */
523 extern int flag_access_control
;
525 /* Nonzero if we want to check the return value of new and avoid calling
526 constructors if it is a null pointer. */
528 extern int flag_check_new
;
530 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
531 initialization variables.
532 0: Old rules, set by -fno-for-scope.
533 2: New ISO rules, set by -ffor-scope.
534 1: Try to implement new ISO rules, but with backup compatibility
535 (and warnings). This is the default, for now. */
537 extern int flag_new_for_scope
;
539 /* Nonzero if we want to emit defined symbols with common-like linkage as
540 weak symbols where possible, in order to conform to C++ semantics.
541 Otherwise, emit them as local symbols. */
543 extern int flag_weak
;
545 /* 0 means we want the preprocessor to not emit line directives for
546 the current working directory. 1 means we want it to do it. -1
547 means we should decide depending on whether debugging information
548 is being emitted or not. */
550 extern int flag_working_directory
;
552 /* Nonzero to use __cxa_atexit, rather than atexit, to register
553 destructors for local statics and global objects. */
555 extern int flag_use_cxa_atexit
;
557 /* Nonzero means make the default pedwarns warnings instead of errors.
558 The value of this flag is ignored if -pedantic is specified. */
560 extern int flag_permissive
;
562 /* Nonzero means to implement standard semantics for exception
563 specifications, calling unexpected if an exception is thrown that
564 doesn't match the specification. Zero means to treat them as
565 assertions and optimize accordingly, but not check them. */
567 extern int flag_enforce_eh_specs
;
569 /* Nonzero (the default) means to generate thread-safe code for
570 initializing local statics. */
572 extern int flag_threadsafe_statics
;
574 /* Nonzero means warn about implicit declarations. */
576 extern int warn_implicit
;
578 /* Maximum template instantiation depth. This limit is rather
579 arbitrary, but it exists to limit the time it takes to notice
580 infinite template instantiations. */
582 extern int max_tinst_depth
;
584 /* Nonzero means the expression being parsed will never be evaluated.
585 This is a count, since unevaluated expressions can nest. */
587 extern int skip_evaluation
;
589 /* C types are partitioned into three subsets: object, function, and
591 #define C_TYPE_OBJECT_P(type) \
592 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
594 #define C_TYPE_INCOMPLETE_P(type) \
595 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
597 #define C_TYPE_FUNCTION_P(type) \
598 (TREE_CODE (type) == FUNCTION_TYPE)
600 /* For convenience we define a single macro to identify the class of
601 object or incomplete types. */
602 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
603 (!C_TYPE_FUNCTION_P (type))
605 /* Attribute table common to the C front ends. */
606 extern const struct attribute_spec c_common_attribute_table
[];
607 extern const struct attribute_spec c_common_format_attribute_table
[];
609 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
610 ID is the identifier to use, NAME is the string.
611 TYPE_DEP indicates whether it depends on type of the function or not
612 (i.e. __PRETTY_FUNCTION__). */
614 extern tree (*make_fname_decl
) (tree
, int);
616 extern tree
identifier_global_value (tree
);
617 extern void record_builtin_type (enum rid
, const char *, tree
);
618 extern tree
build_void_list_node (void);
619 extern void start_fname_decls (void);
620 extern void finish_fname_decls (void);
621 extern const char *fname_as_string (int);
622 extern tree
fname_decl (unsigned, tree
);
624 extern void check_function_arguments (tree
, tree
);
625 extern void check_function_arguments_recurse (void (*)
627 unsigned HOST_WIDE_INT
),
629 unsigned HOST_WIDE_INT
);
630 extern void check_function_format (tree
, tree
);
631 extern void set_Wformat (int);
632 extern tree
handle_format_attribute (tree
*, tree
, tree
, int, bool *);
633 extern tree
handle_format_arg_attribute (tree
*, tree
, tree
, int, bool *);
634 extern int c_common_handle_option (size_t code
, const char *arg
, int value
);
635 extern bool c_common_missing_argument (const char *opt
, size_t code
);
636 extern tree
c_common_type_for_mode (enum machine_mode
, int);
637 extern tree
c_common_type_for_size (unsigned int, int);
638 extern tree
c_common_unsigned_type (tree
);
639 extern tree
c_common_signed_type (tree
);
640 extern tree
c_common_signed_or_unsigned_type (int, tree
);
641 extern tree
c_common_truthvalue_conversion (tree
);
642 extern void c_apply_type_quals_to_decl (int, tree
);
643 extern tree
c_sizeof_or_alignof_type (tree
, enum tree_code
, int);
644 extern tree
c_alignof_expr (tree
);
645 /* Print an error message for invalid operands to arith operation CODE.
646 NOP_EXPR is used as a special case (see truthvalue_conversion). */
647 extern void binary_op_error (enum tree_code
);
648 extern tree
fix_string_type (tree
);
649 struct varray_head_tag
;
650 extern void constant_expression_warning (tree
);
651 extern tree
convert_and_check (tree
, tree
);
652 extern void overflow_warning (tree
);
653 extern void unsigned_conversion_warning (tree
, tree
);
654 extern bool c_determine_visibility (tree
);
656 #define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
657 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
659 /* Subroutine of build_binary_op, used for comparison operations.
660 See if the operands have both been converted from subword integer types
661 and, if so, perhaps change them both back to their original type. */
662 extern tree
shorten_compare (tree
*, tree
*, tree
*, enum tree_code
*);
664 extern tree
pointer_int_sum (enum tree_code
, tree
, tree
);
665 extern unsigned int min_precision (tree
, int);
667 /* Add qualifiers to a type, in the fashion for C. */
668 extern tree
c_build_qualified_type (tree
, int);
670 /* Build tree nodes and builtin functions common to both C and C++ language
672 extern void c_common_nodes_and_builtins (void);
674 extern void set_builtin_user_assembler_name (tree decl
, const char *asmspec
);
676 extern void disable_builtin_function (const char *);
678 extern tree
build_va_arg (tree
, tree
);
680 extern unsigned int c_common_init_options (unsigned int, const char **);
681 extern bool c_common_post_options (const char **);
682 extern bool c_common_init (void);
683 extern void c_common_finish (void);
684 extern void c_common_parse_file (int);
685 extern HOST_WIDE_INT
c_common_get_alias_set (tree
);
686 extern void c_register_builtin_type (tree
, const char*);
687 extern bool c_promoting_integer_type_p (tree
);
688 extern int self_promoting_args_p (tree
);
689 extern tree
strip_array_types (tree
);
690 extern tree
strip_pointer_operator (tree
);
691 extern HOST_WIDE_INT
c_common_to_target_charset (HOST_WIDE_INT
);
693 /* This is the basic parsing function. */
694 extern void c_parse_file (void);
695 /* This is misnamed, it actually performs end-of-compilation processing. */
696 extern void finish_file (void);
699 /* These macros provide convenient access to the various _STMT nodes. */
701 /* Nonzero if this statement should be considered a full-expression,
702 i.e., if temporaries created during this statement should have
703 their destructors run at the end of this statement. (In C, this
704 will always be false, since there are no destructors.) */
705 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
707 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
708 if a statement expression. */
709 #define STATEMENT_LIST_STMT_EXPR(NODE) \
710 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
712 /* Nonzero if a label has been added to the statement list. */
713 #define STATEMENT_LIST_HAS_LABEL(NODE) \
714 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
716 /* WHILE_STMT accessors. These give access to the condition of the
717 while statement and the body of the while statement, respectively. */
718 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
719 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
721 /* DO_STMT accessors. These give access to the condition of the do
722 statement and the body of the do statement, respectively. */
723 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
724 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
726 /* EXPR_STMT accessor. This gives the expression associated with an
727 expression statement. */
728 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
730 /* FOR_STMT accessors. These give access to the init statement,
731 condition, update expression, and body of the for statement,
733 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
734 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
735 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
736 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
738 #define SWITCH_STMT_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
739 #define SWITCH_STMT_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
740 #define SWITCH_STMT_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
742 /* STMT_EXPR accessor. */
743 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
745 /* Nonzero if this statement-expression does not have an associated scope. */
746 #define STMT_EXPR_NO_SCOPE(NODE) \
747 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
749 /* COMPOUND_LITERAL_EXPR accessors. */
750 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
751 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
752 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
753 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
755 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
758 C_DUMMY_TREE_CODE
= LAST_AND_UNUSED_TREE_CODE
,
759 #include "c-common.def"
765 #define c_common_stmt_codes \
766 EXPR_STMT, FOR_STMT, \
767 WHILE_STMT, DO_STMT, \
768 BREAK_STMT, CONTINUE_STMT, SWITCH_STMT
770 /* TRUE if a code represents a statement. The front end init
771 langhook should take care of initialization of this array. */
772 extern bool statement_code_p
[MAX_TREE_CODES
];
774 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
776 #define INIT_STATEMENT_CODES(STMT_CODES) \
779 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
780 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
781 statement_code_p[STMT_CODES[i]] = true; \
784 extern int stmts_are_full_exprs_p (void);
785 extern int anon_aggr_type_p (tree
);
787 /* For a VAR_DECL that is an anonymous union, these are the various
788 sub-variables that make up the anonymous union. */
789 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
791 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
792 #define DECL_C_BIT_FIELD(NODE) \
793 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
794 #define SET_DECL_C_BIT_FIELD(NODE) \
795 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
796 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
797 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
799 extern void emit_local_var (tree
);
800 extern tree
do_case (tree
, tree
);
801 extern tree
build_stmt (enum tree_code
, ...);
802 extern tree
build_case_label (tree
, tree
, tree
);
803 extern tree
build_continue_stmt (void);
804 extern tree
build_break_stmt (void);
806 /* These functions must be defined by each front-end which implements
807 a variant of the C language. They are used in c-common.c. */
809 extern tree
build_unary_op (enum tree_code
, tree
, int);
810 extern tree
build_binary_op (enum tree_code
, tree
, tree
, int);
811 extern tree
perform_integral_promotions (tree
);
813 /* Given two integer or real types, return the type for their sum.
814 Given two compatible ANSI C types, returns the merged type. */
816 extern tree
common_type (tree
, tree
);
818 extern tree
decl_constant_value (tree
);
820 /* Handle increment and decrement of boolean types. */
821 extern tree
boolean_increment (enum tree_code
, tree
);
823 extern int case_compare (splay_tree_key
, splay_tree_key
);
825 extern tree
c_add_case_label (splay_tree
, tree
, tree
, tree
, tree
);
827 extern void c_do_switch_warnings (splay_tree
, tree
);
828 extern void c_do_switch_expr_warnings (splay_tree
, tree
);
830 extern tree
build_function_call (tree
, tree
);
832 extern tree
finish_label_address_expr (tree
);
834 /* Same function prototype, but the C and C++ front ends have
835 different implementations. Used in c-common.c. */
836 extern tree
lookup_label (tree
);
838 extern int vector_types_convertible_p (tree t1
, tree t2
);
840 extern rtx
c_expand_expr (tree
, rtx
, enum machine_mode
, int, rtx
*);
842 extern tree
c_staticp (tree
);
844 extern void init_c_lex (void);
846 extern void c_cpp_builtins (cpp_reader
*);
848 /* Positive if an implicit `extern "C"' scope has just been entered;
849 negative if such a scope has just been exited. */
850 extern GTY(()) int pending_lang_change
;
852 /* Information recorded about each file examined during compilation. */
856 int time
; /* Time spent in the file. */
858 /* Flags used only by C++.
859 INTERFACE_ONLY nonzero means that we are in an "interface" section
860 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
861 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
862 INTERFACE_ONLY is zero, it means that we are responsible for
863 exporting definitions that others might need. */
864 short interface_only
;
865 short interface_unknown
;
868 struct c_fileinfo
*get_fileinfo (const char *);
869 extern void dump_time_statistics (void);
871 extern bool c_dump_tree (void *, tree
);
873 extern void c_warn_unused_result (tree
*);
875 extern void verify_sequence_points (tree
);
877 extern tree
fold_offsetof (tree
);
879 /* Places where an lvalue, or modifiable lvalue, may be required.
880 Used to select diagnostic messages in lvalue_error and
890 extern void lvalue_error (enum lvalue_use
);
892 extern int complete_array_type (tree
*, tree
, bool);
894 /* In c-gimplify.c */
895 extern void c_genericize (tree
);
896 extern int c_gimplify_expr (tree
*, tree
*, tree
*);
897 extern tree
c_build_bind_expr (tree
, tree
);
900 extern void pch_init (void);
901 extern int c_common_valid_pch (cpp_reader
*pfile
, const char *name
, int fd
);
902 extern void c_common_read_pch (cpp_reader
*pfile
, const char *name
, int fd
,
904 extern void c_common_write_pch (void);
905 extern void c_common_no_more_pch (void);
906 extern void c_common_pch_pragma (cpp_reader
*pfile
);
908 extern void builtin_define_with_value (const char *, const char *, int);
909 extern void c_stddef_cpp_builtins (void);
910 extern void fe_file_change (const struct line_map
*);
911 extern void c_parse_error (const char *, enum cpp_ttype
, tree
);
913 /* Objective-C / Objective-C++ entry points. */
915 /* The following ObjC/ObjC++ functions are called by the C and/or C++
916 front-ends; they all must have corresponding stubs in stub-objc.c. */
917 extern tree
objc_is_class_name (tree
);
918 extern tree
objc_is_object_ptr (tree
);
919 extern void objc_check_decl (tree
);
920 extern int objc_is_reserved_word (tree
);
921 extern int objc_comptypes (tree
, tree
, int);
922 extern tree
objc_message_selector (void);
923 extern tree
objc_lookup_ivar (tree
, tree
);
924 extern void objc_clear_super_receiver (void);
925 extern int objc_is_public (tree
, tree
);
926 extern tree
objc_is_id (tree
);
927 extern void objc_declare_alias (tree
, tree
);
928 extern void objc_declare_class (tree
);
929 extern void objc_declare_protocols (tree
);
930 extern tree
objc_build_message_expr (tree
);
931 extern tree
objc_finish_message_expr (tree
, tree
, tree
);
932 extern tree
objc_build_selector_expr (tree
);
933 extern tree
objc_build_protocol_expr (tree
);
934 extern tree
objc_build_encode_expr (tree
);
935 extern tree
objc_build_string_object (tree
);
936 extern tree
objc_get_protocol_qualified_type (tree
, tree
);
937 extern tree
objc_get_class_reference (tree
);
938 extern tree
objc_get_class_ivars (tree
);
939 extern void objc_start_class_interface (tree
, tree
, tree
);
940 extern void objc_start_category_interface (tree
, tree
, tree
);
941 extern void objc_start_protocol (tree
, tree
);
942 extern void objc_continue_interface (void);
943 extern void objc_finish_interface (void);
944 extern void objc_start_class_implementation (tree
, tree
);
945 extern void objc_start_category_implementation (tree
, tree
);
946 extern void objc_continue_implementation (void);
947 extern void objc_finish_implementation (void);
948 extern void objc_set_visibility (int);
949 extern void objc_set_method_type (enum tree_code
);
950 extern tree
objc_build_method_signature (tree
, tree
, tree
);
951 extern void objc_add_method_declaration (tree
);
952 extern void objc_start_method_definition (tree
);
953 extern void objc_finish_method_definition (tree
);
954 extern void objc_add_instance_variable (tree
);
955 extern tree
objc_build_keyword_decl (tree
, tree
, tree
);
956 extern tree
objc_build_throw_stmt (tree
);
957 extern void objc_begin_try_stmt (location_t
, tree
);
958 extern void objc_finish_try_stmt (void);
959 extern void objc_begin_catch_clause (tree
);
960 extern void objc_finish_catch_clause (void);
961 extern void objc_build_finally_clause (location_t
, tree
);
962 extern void objc_build_synchronized (location_t
, tree
, tree
);
963 extern int objc_static_init_needed_p (void);
964 extern tree
objc_generate_static_init_call (tree
);
966 /* The following are provided by the C and C++ front-ends, and called by
968 extern void *objc_get_current_scope (void);
969 extern void objc_mark_locals_volatile (void *);
971 /* In c-ppoutput.c */
972 extern void init_pp_output (FILE *);
973 extern void preprocess_file (cpp_reader
*);
974 extern void pp_file_change (const struct line_map
*);
975 extern void pp_dir_change (cpp_reader
*, const char *);
977 #endif /* ! GCC_C_COMMON_H */