/* Definitions for c-common.c.
Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GCC.
#include "splay-tree.h"
#include "cpplib.h"
+#include "ggc.h"
/* Usage of TREE_LANG_FLAG_?:
0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
2: STMT_LINENO_FOR_FN_P (in _STMT)
3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
COMPOUND_STMT_BODY_BLOCK (in COMPOUND_STMT)
+ STMT_EXPR_WARN_UNUSED_RESULT (in STMT_EXPR)
4: SCOPE_PARTIAL_P (in SCOPE_STMT)
*/
/* Reserved identifiers. This is the union of all the keywords for C,
- C++, and Objective C. All the type modifiers have to be in one
+ C++, and Objective-C. All the type modifiers have to be in one
block at the beginning, because they are used as mask bits. There
are 27 type modifiers; if we add many more we will have to redesign
the mask mechanism. */
RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
/* C extensions */
- RID_BOUNDED, RID_UNBOUNDED, RID_COMPLEX,
+ RID_COMPLEX, RID_THREAD,
/* C++ */
RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
RID_TEMPLATE, RID_NULL, RID_CATCH,
RID_DELETE, RID_FALSE, RID_NAMESPACE,
- RID_NEW, RID_OPERATOR, RID_THIS,
- RID_THROW, RID_TRUE, RID_TRY,
- RID_TYPENAME, RID_TYPEID, RID_USING,
+ RID_NEW, RID_OFFSETOF, RID_OPERATOR,
+ RID_THIS, RID_THROW, RID_TRUE,
+ RID_TRY, RID_TYPENAME, RID_TYPEID,
+ RID_USING,
/* casts */
RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
- /* alternate spellings */
- RID_AND, RID_AND_EQ, RID_NOT, RID_NOT_EQ,
- RID_OR, RID_OR_EQ, RID_XOR, RID_XOR_EQ,
- RID_BITAND, RID_BITOR, RID_COMPL,
-
- /* Objective C */
+ /* Objective-C */
RID_ID, RID_AT_ENCODE, RID_AT_END,
RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
- RID_AT_PROTOCOL, RID_AT_SELECTOR, RID_AT_INTERFACE,
+ RID_AT_PROTOCOL, RID_AT_SELECTOR,
+ RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
+ RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
+ RID_AT_INTERFACE,
RID_AT_IMPLEMENTATION,
RID_MAX,
/* The elements of `ridpointers' are identifier nodes for the reserved
type names and storage classes. It is indexed by a RID_... value. */
-extern tree *ridpointers;
+extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
/* Standard named or nameless data types of the C compiler. */
CTI_SIGNED_WCHAR_TYPE,
CTI_UNSIGNED_WCHAR_TYPE,
CTI_WINT_TYPE,
- CTI_C_SIZE_TYPE, /* The type used for the size_t typedef and the
- result type of sizeof (an ordinary type without
- TYPE_IS_SIZETYPE set, unlike the internal
- sizetype). */
CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
CTI_INTMAX_TYPE,
CTI_CONST_STRING_TYPE,
/* Type for boolean expressions (bool in C++, int in C). */
- CTI_BOOLEAN_TYPE,
- CTI_BOOLEAN_TRUE,
- CTI_BOOLEAN_FALSE,
- /* C99's _Bool type. */
- CTI_C_BOOL_TYPE,
- CTI_C_BOOL_TRUE,
- CTI_C_BOOL_FALSE,
+ CTI_TRUTHVALUE_TYPE,
+ CTI_TRUTHVALUE_TRUE,
+ CTI_TRUTHVALUE_FALSE,
+
CTI_DEFAULT_FUNCTION_TYPE,
CTI_G77_INTEGER_TYPE,
/* Identifier part common to the C front ends. Inherits from
tree_identifier, despite appearances. */
-struct c_common_identifier
+struct c_common_identifier GTY(())
{
struct tree_common common;
struct cpp_hashnode node;
#define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
#define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
#define wint_type_node c_global_trees[CTI_WINT_TYPE]
-#define c_size_type_node c_global_trees[CTI_C_SIZE_TYPE]
#define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
#define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
#define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
#define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
#define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
-#define boolean_type_node c_global_trees[CTI_BOOLEAN_TYPE]
-#define boolean_true_node c_global_trees[CTI_BOOLEAN_TRUE]
-#define boolean_false_node c_global_trees[CTI_BOOLEAN_FALSE]
-
-#define c_bool_type_node c_global_trees[CTI_C_BOOL_TYPE]
-#define c_bool_true_node c_global_trees[CTI_C_BOOL_TRUE]
-#define c_bool_false_node c_global_trees[CTI_C_BOOL_FALSE]
+#define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
+#define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
+#define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
#define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
#define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
#define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
-/* g77 integer types, which which must be kept in sync with f/com.h */
+/* g77 integer types, which must be kept in sync with f/com.h */
#define g77_integer_type_node c_global_trees[CTI_G77_INTEGER_TYPE]
#define g77_uinteger_type_node c_global_trees[CTI_G77_UINTEGER_TYPE]
#define g77_longint_type_node c_global_trees[CTI_G77_LONGINT_TYPE]
/* A node for `((void) 0)'. */
#define void_zero_node c_global_trees[CTI_VOID_ZERO]
-extern tree c_global_trees[CTI_MAX];
+extern GTY(()) tree c_global_trees[CTI_MAX];
+
+/* In a RECORD_TYPE, a sorted array of the fields of the type, not a
+ tree for size reasons. */
+struct sorted_fields_type GTY(())
+{
+ int len;
+ tree GTY((length ("%h.len"))) elts[1];
+};
/* Mark which labels are explicitly declared.
These may be shadowed, and may be referenced from nested functions. */
typedef enum c_language_kind
{
- clk_c, /* A dialect of C: K&R C, ANSI/ISO C89, C2000,
- etc. */
- clk_cplusplus, /* ANSI/ISO C++ */
- clk_objective_c /* Objective C */
+ clk_c = 0, /* C90, C94 or C99 */
+ clk_objc = 1, /* clk_c with ObjC features. */
+ clk_cxx = 2, /* ANSI/ISO C++ */
+ clk_objcxx = 3 /* clk_cxx with ObjC features. */
}
c_language_kind;
+/* To test for a specific language use c_language, defined by each
+ front end. For "ObjC features" or "not C++" use the macros. */
+extern c_language_kind c_language;
+
+#define c_dialect_cxx() (c_language & clk_cxx)
+#define c_dialect_objc() (c_language & clk_objc)
+
/* Information about a statement tree. */
-struct stmt_tree_s {
+struct stmt_tree_s GTY(()) {
/* The last statement added to the tree. */
tree x_last_stmt;
/* The type of the last expression statement. (This information is
tree x_last_expr_type;
/* The last filename we recorded. */
const char *x_last_expr_filename;
- /* In C++, Non-zero if we should treat statements as full
+ /* In C++, Nonzero if we should treat statements as full
expressions. In particular, this variable is no-zero if at the
end of a statement we should destroy any temporaries created
during that statement. Similarly, if, at the end of a block, we
should destroy any local variables in this block. Normally, this
- variable is non-zero, since those are the normal semantics of
+ variable is nonzero, since those are the normal semantics of
C++.
However, in order to represent aggregate initialization code as
/* Global state pertinent to the current function. Some C dialects
extend this structure with additional fields. */
-struct language_function {
+struct c_language_function GTY(()) {
/* While we are parsing the function, this contains information
about the statement-tree that we are building. */
struct stmt_tree_s x_stmt_tree;
/* Language-specific hooks. */
-extern int (*lang_statement_code_p) PARAMS ((enum tree_code));
-extern void (*lang_expand_stmt) PARAMS ((tree));
-extern void (*lang_expand_decl_stmt) PARAMS ((tree));
-extern void (*lang_expand_function_end) PARAMS ((void));
-extern tree gettags PARAMS ((void));
+extern void (*lang_expand_stmt) (tree);
+extern void (*lang_expand_decl_stmt) (tree);
+extern void (*lang_expand_function_end) (void);
/* Callback that determines if it's ok for a function to have no
noreturn attribute. */
-extern int (*lang_missing_noreturn_ok_p) PARAMS ((tree));
-
-extern int yyparse PARAMS ((void));
-extern void free_parser_stacks PARAMS ((void));
-
-extern stmt_tree current_stmt_tree PARAMS ((void));
-extern tree *current_scope_stmt_stack PARAMS ((void));
-extern void begin_stmt_tree PARAMS ((tree *));
-extern tree add_stmt PARAMS ((tree));
-extern void add_decl_stmt PARAMS ((tree));
-extern tree add_scope_stmt PARAMS ((int, int));
-extern void finish_stmt_tree PARAMS ((tree *));
-
-extern int statement_code_p PARAMS ((enum tree_code));
-extern tree walk_stmt_tree PARAMS ((tree *,
- walk_tree_fn,
- void *));
-extern void prep_stmt PARAMS ((tree));
-extern void expand_stmt PARAMS ((tree));
-extern void mark_stmt_tree PARAMS ((void *));
-extern void shadow_warning PARAMS ((const char *,
- tree, tree));
-extern tree c_begin_if_stmt PARAMS ((void));
-extern tree c_begin_while_stmt PARAMS ((void));
-extern void c_finish_while_stmt_cond PARAMS ((tree, tree));
-
-
-/* Extra information associated with a DECL. Other C dialects extend
- this structure in various ways. The C front-end only uses this
- structure for FUNCTION_DECLs; all other DECLs have a NULL
- DECL_LANG_SPECIFIC field. */
-
-struct c_lang_decl {
- unsigned declared_inline : 1;
-};
+extern int (*lang_missing_noreturn_ok_p) (tree);
+
+extern void push_file_scope (void);
+extern void pop_file_scope (void);
+extern int yyparse (void);
+extern stmt_tree current_stmt_tree (void);
+extern tree *current_scope_stmt_stack (void);
+extern void begin_stmt_tree (tree *);
+extern tree add_stmt (tree);
+extern void add_decl_stmt (tree);
+extern tree add_scope_stmt (int, int);
+extern void finish_stmt_tree (tree *);
+
+extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
+extern void prep_stmt (tree);
+extern void expand_stmt (tree);
+extern tree c_begin_if_stmt (void);
+extern tree c_begin_while_stmt (void);
+extern void c_finish_while_stmt_cond (tree, tree);
+
+extern int field_decl_cmp (const void *, const void *);
+extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
+ void *);
+\f
+/* Switches common to the C front ends. */
-/* In a FUNCTION_DECL for which DECL_BUILT_IN does not hold, this is
- the approximate number of statements in this function. There is
- no need for this number to be exact; it is only used in various
- heuristics regarding optimization. */
-#define DECL_NUM_STMTS(NODE) \
- (FUNCTION_DECL_CHECK (NODE)->decl.u1.i)
+/* Nonzero if prepreprocessing only. */
-extern void c_mark_lang_decl PARAMS ((struct c_lang_decl *));
+extern int flag_preprocess_only;
-/* The variant of the C language being processed. Each C language
- front-end defines this variable. */
+/* Zero means that faster, ...NonNil variants of objc_msgSend...
+ calls will be used in ObjC; passing nil receivers to such calls
+ will most likely result in crashes. */
+extern int flag_nil_receivers;
-extern c_language_kind c_language;
+/* Nonzero means that we will allow new ObjC exception syntax (@throw,
+ @try, etc.) in source code. */
+extern int flag_objc_exceptions;
-/* Nonzero if prepreprocessing only. */
-extern int flag_preprocess_only;
+/* Nonzero means that code generation will be altered to support
+ "zero-link" execution. This currently affects ObjC only, but may
+ affect other languages in the future. */
+extern int flag_zero_link;
+
+/* Nonzero means emit an '__OBJC, __image_info' for the current translation
+ unit. It will inform the ObjC runtime that class definition(s) herein
+ contained are to replace one(s) previously loaded. */
+extern int flag_replace_objc_classes;
+
+/* Nonzero means don't output line number information. */
+
+extern char flag_no_line_commands;
+
+/* Nonzero causes -E output not to be done, but directives such as
+ #define that have side effects are still obeyed. */
+
+extern char flag_no_output;
+
+/* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
+ 'N' of the command line switch. */
+
+extern char flag_dump_macros;
+
+/* Nonzero means pass #include lines through to the output. */
+
+extern char flag_dump_includes;
+
+/* The file name to which we should write a precompiled header, or
+ NULL if no header will be written in this compile. */
+
+extern const char *pch_file;
/* Nonzero if an ISO standard was selected. It rejects macros in the
user's namespace. */
+
extern int flag_iso;
/* Nonzero if -undef was given. It suppresses target built-in macros
and assertions. */
+
extern int flag_undef;
-/* Nonzero means give string constants the type `const char *', rather
- than `char *'. */
+/* Nonzero means don't recognize the non-ANSI builtin functions. */
-extern int flag_const_strings;
+extern int flag_no_builtin;
+
+/* Nonzero means don't recognize the non-ANSI builtin functions.
+ -ansi sets this. */
+
+extern int flag_no_nonansi_builtin;
/* Nonzero means give `double' the same size as `float'. */
extern int flag_short_wchar;
-/* Nonzero means warn about use of multicharacter literals. */
-extern int warn_multichar;
+/* Nonzero means allow Microsoft extensions without warnings or errors. */
+extern int flag_ms_extensions;
+
+/* Nonzero means don't recognize the keyword `asm'. */
+
+extern int flag_no_asm;
+
+/* Nonzero means give string constants the type `const char *', as mandated
+ by the standard. */
+
+extern int flag_const_strings;
+
+/* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
+
+extern int flag_signed_bitfields;
+extern int explicit_flag_signed_bitfields;
+
+/* Nonzero means warn about pointer casts that can drop a type qualifier
+ from the pointer target type. */
+
+extern int warn_cast_qual;
+
+/* Warn about functions which might be candidates for format attributes. */
+
+extern int warn_missing_format_attribute;
+
+/* Nonzero means warn about sizeof(function) or addition/subtraction
+ of function pointers. */
+
+extern int warn_pointer_arith;
-/* Warn about *printf or *scanf format/argument anomalies. */
+/* Nonzero means warn for any global function def
+ without separate previous prototype decl. */
+
+extern int warn_missing_prototypes;
+
+/* Warn if adding () is suggested. */
+
+extern int warn_parentheses;
+
+/* Warn if initializer is not completely bracketed. */
+
+extern int warn_missing_braces;
+
+/* Warn about comparison of signed and unsigned values.
+ If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
+
+extern int warn_sign_compare;
+
+/* Nonzero means warn about usage of long long when `-pedantic'. */
+
+extern int warn_long_long;
+
+/* Nonzero means warn about deprecated conversion from string constant to
+ `char *'. */
+
+extern int warn_write_strings;
+
+/* Nonzero means warn about multiple (redundant) decls for the same single
+ variable or function. */
+
+extern int warn_redundant_decls;
+
+/* Warn about testing equality of floating point numbers. */
+
+extern int warn_float_equal;
+
+/* Warn about a subscript that has type char. */
+
+extern int warn_char_subscripts;
+
+/* Warn if a type conversion is done that might have confusing results. */
+
+extern int warn_conversion;
+
+/* Warn about #pragma directives that are not recognized. */
+
+extern int warn_unknown_pragmas; /* Tri state variable. */
+
+/* Warn about format/argument anomalies in calls to formatted I/O functions
+ (*printf, *scanf, strftime, strfmon, etc.). */
extern int warn_format;
extern int warn_format_security;
-/* Warn about possible violations of sequence point rules. */
-extern int warn_sequence_point;
+/* C/ObjC language option variables. */
-/* Warn about functions which might be candidates for format attributes. */
-extern int warn_missing_format_attribute;
+/* Nonzero means message about use of implicit function declarations;
+ 1 means warning; 2 means error. */
-/* Nonzero means warn about sizeof (function) or addition/subtraction
- of function pointers. */
+extern int mesg_implicit_function_declaration;
-extern int warn_pointer_arith;
+/* Nonzero means allow type mismatches in conditional expressions;
+ just make their values `void'. */
-/* Nonzero means to warn about compile-time division by zero. */
-extern int warn_div_by_zero;
+extern int flag_cond_mismatch;
/* Nonzero means enable C89 Amendment 1 features. */
extern int flag_isoc99;
-/* Nonzero means environment is hosted (i.e., not freestanding) */
+/* Nonzero means that we have builtin functions, and main is an int. */
extern int flag_hosted;
-/* Nonzero means add default format_arg attributes for functions not
- in ISO C. */
+/* Nonzero means warn when casting a function call to a type that does
+ not match the return type (e.g. (float)sqrt() or (anything*)malloc()
+ when there is no previous declaration of sqrt or malloc. */
-extern int flag_noniso_default_format_attributes;
+extern int warn_bad_function_cast;
-/* Nonzero means don't recognize any builtin functions. */
+/* Warn about traditional constructs whose meanings changed in ANSI C. */
-extern int flag_no_builtin;
+extern int warn_traditional;
-/* Nonzero means don't recognize the non-ANSI builtin functions.
- -ansi sets this. */
+/* Nonzero means warn for a declaration found after a statement. */
-extern int flag_no_nonansi_builtin;
+extern int warn_declaration_after_statement;
-/* Nonzero means warn about suggesting putting in ()'s. */
+/* Nonzero means warn for non-prototype function decls
+ or non-prototyped defs without previous prototype. */
-extern int warn_parentheses;
+extern int warn_strict_prototypes;
-/* Warn if a type conversion is done that might have confusing results. */
+/* Nonzero means warn for any global function def
+ without separate previous decl. */
-extern int warn_conversion;
+extern int warn_missing_declarations;
-/* Nonzero means warn about usage of long long,
- when `-pedantic' and not C99. */
+/* Nonzero means warn about extern declarations of objects not at
+ file-scope level and about *all* declarations of functions (whether
+ extern or static) not at file-scope level. Note that we exclude
+ implicit function declarations. To get warnings about those, use
+ -Wimplicit. */
-extern int warn_long_long;
+extern int warn_nested_externs;
+
+/* Warn if main is suspicious. */
+
+extern int warn_main;
+
+/* Nonzero means warn about possible violations of sequence point rules. */
+
+extern int warn_sequence_point;
+
+/* Nonzero means warn about uninitialized variable when it is initialized with itself.
+ For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero. */
+
+extern int warn_init_self;
+
+
+/* Nonzero means to warn about compile-time division by zero. */
+extern int warn_div_by_zero;
+
+/* Nonzero means warn about use of implicit int. */
+
+extern int warn_implicit_int;
+
+/* Warn about NULL being passed to argument slots marked as requiring
+ non-NULL. */
+
+extern int warn_nonnull;
+
+/* Warn about old-style parameter declaration. */
+
+extern int warn_old_style_definition;
+
+
+/* ObjC language option variables. */
+
+
+/* Open and close the file for outputting class declarations, if
+ requested (ObjC). */
+
+extern int flag_gen_declaration;
+
+/* Generate code for GNU or NeXT runtime environment. */
+
+extern int flag_next_runtime;
+
+/* Tells the compiler that this is a special run. Do not perform any
+ compiling, instead we are to test some platform dependent features
+ and output a C header file with appropriate definitions. */
+
+extern int print_struct_values;
+
+/* ???. Undocumented. */
+
+extern const char *constant_string_class_name;
+
+/* Warn if multiple methods are seen for the same selector, but with
+ different argument types. Performs the check on the whole selector
+ table at the end of compilation. */
+
+extern int warn_selector;
+
+/* Warn if a @selector() is found, and no method with that selector
+ has been previously declared. The check is done on each
+ @selector() as soon as it is found - so it warns about forward
+ declarations. */
+
+extern int warn_undeclared_selector;
+
+/* Warn if methods required by a protocol are not implemented in the
+ class adopting it. When turned off, methods inherited to that
+ class are also considered implemented. */
+
+extern int warn_protocol;
+
+
+/* C++ language option variables. */
+
+
+/* Nonzero means don't recognize any extension keywords. */
+
+extern int flag_no_gnu_keywords;
+
+/* Nonzero means do emit exported implementations of functions even if
+ they can be inlined. */
+
+extern int flag_implement_inlines;
+
+/* Nonzero means that implicit instantiations will be emitted if needed. */
+
+extern int flag_implicit_templates;
+
+/* Nonzero means that implicit instantiations of inline templates will be
+ emitted if needed, even if instantiations of non-inline templates
+ aren't. */
+
+extern int flag_implicit_inline_templates;
+
+/* Nonzero means generate separate instantiation control files and
+ juggle them at link time. */
+
+extern int flag_use_repository;
+
+/* Nonzero if we want to issue diagnostics that the standard says are not
+ required. */
+
+extern int flag_optional_diags;
+
+/* Nonzero means we should attempt to elide constructors when possible. */
+
+extern int flag_elide_constructors;
+
+/* Nonzero means that member functions defined in class scope are
+ inline by default. */
+
+extern int flag_default_inline;
+
+/* Controls whether compiler generates 'type descriptor' that give
+ run-time type information. */
+
+extern int flag_rtti;
+
+/* Nonzero if we want to conserve space in the .o files. We do this
+ by putting uninitialized data and runtime initialized data into
+ .common instead of .data at the expense of not flagging multiple
+ definitions. */
+
+extern int flag_conserve_space;
+
+/* Nonzero if we want to obey access control semantics. */
+
+extern int flag_access_control;
+
+/* Nonzero if we want to check the return value of new and avoid calling
+ constructors if it is a null pointer. */
+
+extern int flag_check_new;
+
+/* Nonzero if we want the new ISO rules for pushing a new scope for `for'
+ initialization variables.
+ 0: Old rules, set by -fno-for-scope.
+ 2: New ISO rules, set by -ffor-scope.
+ 1: Try to implement new ISO rules, but with backup compatibility
+ (and warnings). This is the default, for now. */
+
+extern int flag_new_for_scope;
+
+/* Nonzero if we want to emit defined symbols with common-like linkage as
+ weak symbols where possible, in order to conform to C++ semantics.
+ Otherwise, emit them as local symbols. */
+
+extern int flag_weak;
+
+/* 0 means we want the preprocessor to not emit line directives for
+ the current working directory. 1 means we want it to do it. -1
+ means we should decide depending on whether debugging information
+ is being emitted or not. */
+
+extern int flag_working_directory;
+
+/* Nonzero to use __cxa_atexit, rather than atexit, to register
+ destructors for local statics and global objects. */
+
+extern int flag_use_cxa_atexit;
+
+/* Nonzero means make the default pedwarns warnings instead of errors.
+ The value of this flag is ignored if -pedantic is specified. */
+
+extern int flag_permissive;
+
+/* Nonzero means to implement standard semantics for exception
+ specifications, calling unexpected if an exception is thrown that
+ doesn't match the specification. Zero means to treat them as
+ assertions and optimize accordingly, but not check them. */
+
+extern int flag_enforce_eh_specs;
+
+/* Nonzero means warn about things that will change when compiling
+ with an ABI-compliant compiler. */
+
+extern int warn_abi;
+
+/* Nonzero means warn about invalid uses of offsetof. */
+
+extern int warn_invalid_offsetof;
+
+/* Nonzero means warn about implicit declarations. */
+
+extern int warn_implicit;
+
+/* Nonzero means warn when all ctors or dtors are private, and the class
+ has no friends. */
+
+extern int warn_ctor_dtor_privacy;
+
+/* Nonzero means warn in function declared in derived class has the
+ same name as a virtual in the base class, but fails to match the
+ type signature of any virtual function in the base class. */
+
+extern int warn_overloaded_virtual;
+
+/* Nonzero means warn when declaring a class that has a non virtual
+ destructor, when it really ought to have a virtual one. */
+
+extern int warn_nonvdtor;
+
+/* Nonzero means warn when the compiler will reorder code. */
+
+extern int warn_reorder;
+
+/* Nonzero means warn when synthesis behavior differs from Cfront's. */
+
+extern int warn_synth;
+
+/* Nonzero means warn when we convert a pointer to member function
+ into a pointer to (void or function). */
+
+extern int warn_pmf2ptr;
+
+/* Nonzero means warn about violation of some Effective C++ style rules. */
+
+extern int warn_ecpp;
+
+/* Nonzero means warn where overload resolution chooses a promotion from
+ unsigned to signed over a conversion to an unsigned of the same size. */
+
+extern int warn_sign_promo;
+
+/* Nonzero means warn when an old-style cast is used. */
+
+extern int warn_old_style_cast;
+
+/* Nonzero means warn when non-templatized friend functions are
+ declared within a template */
+
+extern int warn_nontemplate_friend;
+
+/* Nonzero means complain about deprecated features. */
+
+extern int warn_deprecated;
+
+/* Maximum template instantiation depth. This limit is rather
+ arbitrary, but it exists to limit the time it takes to notice
+ infinite template instantiations. */
+
+extern int max_tinst_depth;
+
+/* Nonzero means the expression being parsed will never be evaluated.
+ This is a count, since unevaluated expressions can nest. */
+
+extern int skip_evaluation;
/* C types are partitioned into three subsets: object, function, and
incomplete types. */
TYPE_DEP indicates whether it depends on type of the function or not
(i.e. __PRETTY_FUNCTION__). */
-extern tree (*make_fname_decl) PARAMS ((tree, int));
-
-extern tree identifier_global_value PARAMS ((tree));
-extern void record_builtin_type PARAMS ((enum rid,
- const char *, tree));
-extern tree build_void_list_node PARAMS ((void));
-extern void start_fname_decls PARAMS ((void));
-extern void finish_fname_decls PARAMS ((void));
-extern const char *fname_as_string PARAMS ((int));
-extern tree fname_decl PARAMS ((unsigned, tree));
-extern const char *fname_string PARAMS ((unsigned));
-
-extern void check_function_format PARAMS ((int *, tree, tree));
-extern void set_Wformat PARAMS ((int));
-extern tree handle_format_attribute PARAMS ((tree *, tree, tree,
- int, bool *));
-extern tree handle_format_arg_attribute PARAMS ((tree *, tree, tree,
- int, bool *));
-extern void c_common_insert_default_attributes PARAMS ((tree));
-extern tree c_common_type_for_mode PARAMS ((enum machine_mode,
- int));
-extern tree c_common_type_for_size PARAMS ((unsigned int, int));
-extern tree c_common_unsigned_type PARAMS ((tree));
-extern tree c_common_signed_type PARAMS ((tree));
-extern tree c_common_signed_or_unsigned_type PARAMS ((int, tree));
-extern tree c_common_truthvalue_conversion PARAMS ((tree));
-extern void c_apply_type_quals_to_decl PARAMS ((int, tree));
-extern tree c_sizeof PARAMS ((tree));
-extern tree c_alignof PARAMS ((tree));
-extern tree c_alignof_expr PARAMS ((tree));
+extern tree (*make_fname_decl) (tree, int);
+
+extern tree identifier_global_value (tree);
+extern void record_builtin_type (enum rid, const char *, tree);
+extern tree build_void_list_node (void);
+extern void start_fname_decls (void);
+extern void finish_fname_decls (void);
+extern const char *fname_as_string (int);
+extern tree fname_decl (unsigned, tree);
+
+extern void check_function_arguments (tree, tree);
+extern void check_function_arguments_recurse (void (*)
+ (void *, tree,
+ unsigned HOST_WIDE_INT),
+ void *, tree,
+ unsigned HOST_WIDE_INT);
+extern void check_function_format (int *, tree, tree);
+extern void set_Wformat (int);
+extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
+extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
+extern int c_common_handle_option (size_t code, const char *arg, int value);
+extern bool c_common_missing_argument (const char *opt, size_t code);
+extern tree c_common_type_for_mode (enum machine_mode, int);
+extern tree c_common_type_for_size (unsigned int, int);
+extern tree c_common_unsigned_type (tree);
+extern tree c_common_signed_type (tree);
+extern tree c_common_signed_or_unsigned_type (int, tree);
+extern tree c_common_truthvalue_conversion (tree);
+extern void c_apply_type_quals_to_decl (int, tree);
+extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
+extern tree c_alignof_expr (tree);
/* Print an error message for invalid operands to arith operation CODE.
NOP_EXPR is used as a special case (see truthvalue_conversion). */
-extern void binary_op_error PARAMS ((enum tree_code));
-extern tree c_expand_expr_stmt PARAMS ((tree));
-extern void c_expand_start_cond PARAMS ((tree, int, tree));
-extern void c_finish_then PARAMS ((void));
-extern void c_expand_start_else PARAMS ((void));
-extern void c_finish_else PARAMS ((void));
-extern void c_expand_end_cond PARAMS ((void));
+extern void binary_op_error (enum tree_code);
+#define my_friendly_assert(EXP, N) (void) \
+ (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
+
+extern tree c_expand_expr_stmt (tree);
+extern void c_expand_start_cond (tree, int, tree);
+extern void c_finish_then (void);
+extern void c_expand_start_else (void);
+extern void c_finish_else (void);
+extern void c_expand_end_cond (void);
/* Validate the expression after `case' and apply default promotions. */
-extern tree check_case_value PARAMS ((tree));
-extern tree fix_string_type PARAMS ((tree));
+extern tree check_case_value (tree);
+extern tree fix_string_type (tree);
struct varray_head_tag;
-extern tree combine_strings PARAMS ((struct varray_head_tag *));
-extern void constant_expression_warning PARAMS ((tree));
-extern tree convert_and_check PARAMS ((tree, tree));
-extern void overflow_warning PARAMS ((tree));
-extern void unsigned_conversion_warning PARAMS ((tree, tree));
+extern void constant_expression_warning (tree);
+extern tree convert_and_check (tree, tree);
+extern void overflow_warning (tree);
+extern void unsigned_conversion_warning (tree, tree);
-/* Read the rest of the current #-directive line. */
-extern char *get_directive_line PARAMS ((void));
-#define GET_DIRECTIVE_LINE() get_directive_line ()
+#define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
+#define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
/* Subroutine of build_binary_op, used for comparison operations.
See if the operands have both been converted from subword integer types
and, if so, perhaps change them both back to their original type. */
-extern tree shorten_compare PARAMS ((tree *, tree *, tree *, enum tree_code *));
+extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
-extern tree pointer_int_sum PARAMS ((enum tree_code, tree, tree));
-extern unsigned int min_precision PARAMS ((tree, int));
+extern tree pointer_int_sum (enum tree_code, tree, tree);
+extern unsigned int min_precision (tree, int);
/* Add qualifiers to a type, in the fashion for C. */
-extern tree c_build_qualified_type PARAMS ((tree, int));
+extern tree c_build_qualified_type (tree, int);
/* Build tree nodes and builtin functions common to both C and C++ language
frontends. */
-extern void c_common_nodes_and_builtins PARAMS ((void));
+extern void c_common_nodes_and_builtins (void);
-extern void disable_builtin_function PARAMS ((const char *));
+extern void disable_builtin_function (const char *);
-extern tree build_va_arg PARAMS ((tree, tree));
+extern tree build_va_arg (tree, tree);
-extern void c_common_init_options PARAMS ((enum c_language_kind));
-extern void c_common_post_options PARAMS ((void));
-extern const char *c_common_init PARAMS ((const char *));
-extern void c_common_finish PARAMS ((void));
-extern void c_common_parse_file PARAMS ((int));
-extern HOST_WIDE_INT c_common_get_alias_set PARAMS ((tree));
-extern bool c_promoting_integer_type_p PARAMS ((tree));
-extern int self_promoting_args_p PARAMS ((tree));
-extern tree strip_array_types PARAMS ((tree));
+extern unsigned int c_common_init_options (unsigned int, const char **);
+extern bool c_common_post_options (const char **);
+extern bool c_common_init (void);
+extern void c_common_finish (void);
+extern void c_common_parse_file (int);
+extern HOST_WIDE_INT c_common_get_alias_set (tree);
+extern void c_register_builtin_type (tree, const char*);
+extern bool c_promoting_integer_type_p (tree);
+extern int self_promoting_args_p (tree);
+extern tree strip_array_types (tree);
+extern tree strip_pointer_operator (tree);
+
+/* This is the basic parsing function. */
+extern void c_parse_file (void);
+/* This is misnamed, it actually performs end-of-compilation processing. */
+extern void finish_file (void);
/* These macros provide convenient access to the various _STMT nodes. */
/* RETURN_STMT accessors. These give the expression associated with a
return statement, and whether it should be ignored when expanding
(as opposed to inlining). */
-#define RETURN_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
+#define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
/* EXPR_STMT accessor. This gives the expression associated with an
expression statement. */
/* GOTO_STMT accessor. This gives access to the label associated with
a goto statement. */
#define GOTO_DESTINATION(NODE) TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
-/* True for goto created artifically by the compiler. */
+/* True for goto created artificially by the compiler. */
#define GOTO_FAKE_P(NODE) (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
/* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
#define STMT_EXPR_NO_SCOPE(NODE) \
TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
+/* Nonzero if this statement-expression should cause warning if its result
+ is not used. */
+#define STMT_EXPR_WARN_UNUSED_RESULT(NODE) \
+ TREE_LANG_FLAG_3 (STMT_EXPR_CHECK (NODE))
+
/* LABEL_STMT accessor. This gives access to the label associated with
the given label statement. */
#define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
#define STMT_LINENO(NODE) \
(TREE_COMPLEXITY ((NODE)))
-/* If non-zero, the STMT_LINENO for NODE is the line at which the
+/* If nonzero, the STMT_LINENO for NODE is the line at which the
function ended. */
#define STMT_LINENO_FOR_FN_P(NODE) \
(TREE_LANG_FLAG_2 ((NODE)))
#undef DEFTREECODE
-extern void genrtl_do_pushlevel PARAMS ((void));
-extern void genrtl_goto_stmt PARAMS ((tree));
-extern void genrtl_expr_stmt PARAMS ((tree));
-extern void genrtl_expr_stmt_value PARAMS ((tree, int, int));
-extern void genrtl_decl_stmt PARAMS ((tree));
-extern void genrtl_if_stmt PARAMS ((tree));
-extern void genrtl_while_stmt PARAMS ((tree));
-extern void genrtl_do_stmt PARAMS ((tree));
-extern void genrtl_return_stmt PARAMS ((tree));
-extern void genrtl_for_stmt PARAMS ((tree));
-extern void genrtl_break_stmt PARAMS ((void));
-extern void genrtl_continue_stmt PARAMS ((void));
-extern void genrtl_scope_stmt PARAMS ((tree));
-extern void genrtl_switch_stmt PARAMS ((tree));
-extern void genrtl_case_label PARAMS ((tree));
-extern void genrtl_compound_stmt PARAMS ((tree));
-extern void genrtl_asm_stmt PARAMS ((tree, tree,
- tree, tree,
- tree, int));
-extern void genrtl_decl_cleanup PARAMS ((tree));
-extern int stmts_are_full_exprs_p PARAMS ((void));
-extern int anon_aggr_type_p PARAMS ((tree));
+#define c_common_stmt_codes \
+ CLEANUP_STMT, EXPR_STMT, COMPOUND_STMT, \
+ DECL_STMT, IF_STMT, FOR_STMT, \
+ WHILE_STMT, DO_STMT, RETURN_STMT, \
+ BREAK_STMT, CONTINUE_STMT, SCOPE_STMT, \
+ SWITCH_STMT, GOTO_STMT, LABEL_STMT, \
+ ASM_STMT, FILE_STMT, CASE_LABEL
+
+/* TRUE if a code represents a statement. The front end init
+ langhook should take care of initialization of this array. */
+extern bool statement_code_p[MAX_TREE_CODES];
+
+#define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
+
+#define INIT_STATEMENT_CODES(STMT_CODES) \
+ do { \
+ unsigned int i; \
+ memset (&statement_code_p, 0, sizeof (statement_code_p)); \
+ for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
+ statement_code_p[STMT_CODES[i]] = true; \
+ } while (0)
+
+extern void genrtl_do_pushlevel (void);
+extern void genrtl_goto_stmt (tree);
+extern void genrtl_expr_stmt (tree);
+extern void genrtl_expr_stmt_value (tree, int, int);
+extern void genrtl_decl_stmt (tree);
+extern void genrtl_if_stmt (tree);
+extern void genrtl_while_stmt (tree);
+extern void genrtl_do_stmt (tree);
+extern void genrtl_return_stmt (tree);
+extern void genrtl_for_stmt (tree);
+extern void genrtl_break_stmt (void);
+extern void genrtl_continue_stmt (void);
+extern void genrtl_scope_stmt (tree);
+extern void genrtl_switch_stmt (tree);
+extern void genrtl_case_label (tree);
+extern void genrtl_compound_stmt (tree);
+extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
+extern void genrtl_cleanup_stmt (tree);
+extern int stmts_are_full_exprs_p (void);
+extern int anon_aggr_type_p (tree);
/* For a VAR_DECL that is an anonymous union, these are the various
sub-variables that make up the anonymous union. */
an explicit asm specification. */
#define DECL_C_HARD_REGISTER(DECL) DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
-extern void emit_local_var PARAMS ((tree));
-extern void make_rtl_for_local_static PARAMS ((tree));
-extern tree expand_cond PARAMS ((tree));
-extern tree c_expand_return PARAMS ((tree));
-extern tree do_case PARAMS ((tree, tree));
-extern tree build_stmt PARAMS ((enum tree_code, ...));
-extern tree build_case_label PARAMS ((tree, tree, tree));
-extern tree build_continue_stmt PARAMS ((void));
-extern tree build_break_stmt PARAMS ((void));
-extern tree build_return_stmt PARAMS ((tree));
+extern void emit_local_var (tree);
+extern void make_rtl_for_local_static (tree);
+extern tree expand_cond (tree);
+extern tree c_expand_return (tree);
+extern tree do_case (tree, tree);
+extern tree build_stmt (enum tree_code, ...);
+extern tree build_case_label (tree, tree, tree);
+extern tree build_continue_stmt (void);
+extern tree build_break_stmt (void);
+extern tree build_return_stmt (tree);
#define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
initializers and cleanups. */
#define COMPOUND_STMT_BODY_BLOCK(NODE) TREE_LANG_FLAG_3 (NODE)
-extern void c_expand_asm_operands PARAMS ((tree, tree, tree, tree, int, const char *, int));
+extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
/* These functions must be defined by each front-end which implements
a variant of the C language. They are used in c-common.c. */
-extern tree build_unary_op PARAMS ((enum tree_code,
- tree, int));
-extern tree build_binary_op PARAMS ((enum tree_code,
- tree, tree, int));
-extern int lvalue_p PARAMS ((tree));
-extern tree default_conversion PARAMS ((tree));
+extern tree build_unary_op (enum tree_code, tree, int);
+extern tree build_binary_op (enum tree_code, tree, tree, int);
+extern int lvalue_p (tree);
+extern tree default_conversion (tree);
/* Given two integer or real types, return the type for their sum.
Given two compatible ANSI C types, returns the merged type. */
-extern tree common_type PARAMS ((tree, tree));
+extern tree common_type (tree, tree);
-extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
+extern tree expand_tree_builtin (tree, tree, tree);
-extern tree decl_constant_value PARAMS ((tree));
+extern tree decl_constant_value (tree);
/* Handle increment and decrement of boolean types. */
-extern tree boolean_increment PARAMS ((enum tree_code,
- tree));
+extern tree boolean_increment (enum tree_code, tree);
/* Hook currently used only by the C++ front end to reset internal state
after entering or leaving a header file. */
-extern void extract_interface_info PARAMS ((void));
-
-extern void mark_c_language_function PARAMS ((struct language_function *));
+extern void extract_interface_info (void);
-extern int case_compare PARAMS ((splay_tree_key,
- splay_tree_key));
+extern int case_compare (splay_tree_key, splay_tree_key);
-extern tree c_add_case_label PARAMS ((splay_tree,
- tree, tree,
- tree));
+extern tree c_add_case_label (splay_tree, tree, tree, tree);
-extern tree build_function_call PARAMS ((tree, tree));
+extern tree build_function_call (tree, tree);
-extern tree finish_label_address_expr PARAMS ((tree));
+extern tree finish_label_address_expr (tree);
/* Same function prototype, but the C and C++ front ends have
different implementations. Used in c-common.c. */
-extern tree lookup_label PARAMS ((tree));
+extern tree lookup_label (tree);
+
+extern int vector_types_convertible_p (tree t1, tree t2);
+
+extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
+
+extern int c_safe_from_p (rtx, tree);
+
+extern int c_staticp (tree);
-extern rtx c_expand_expr PARAMS ((tree, rtx,
- enum machine_mode,
- int));
+extern int c_common_unsafe_for_reeval (tree);
-extern int c_safe_from_p PARAMS ((rtx, tree));
+extern void init_c_lex (void);
-extern int c_staticp PARAMS ((tree));
+extern void c_cpp_builtins (cpp_reader *);
-extern int c_common_unsafe_for_reeval PARAMS ((tree));
+/* Positive if an implicit `extern "C"' scope has just been entered;
+ negative if such a scope has just been exited. */
+extern GTY(()) int pending_lang_change;
/* Information recorded about each file examined during compilation. */
short interface_unknown;
};
-struct c_fileinfo *get_fileinfo PARAMS ((const char *));
-extern void dump_time_statistics PARAMS ((void));
+struct c_fileinfo *get_fileinfo (const char *);
+extern void dump_time_statistics (void);
+
+extern bool c_dump_tree (void *, tree);
+
+extern void pch_init (void);
+extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
+extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
+ const char *orig);
+extern void c_common_write_pch (void);
+extern void c_common_no_more_pch (void);
+extern void builtin_define_with_value (const char *, const char *, int);
+extern void c_stddef_cpp_builtins (void);
+extern void fe_file_change (const struct line_map *);
+extern int c_estimate_num_insns (tree decl);
+extern bool c_decl_uninit (tree t);
+extern void c_parse_error (const char *, enum cpp_ttype, tree);
+
+/* The following have been moved here from c-tree.h, since they're needed
+ in the ObjC++ world, too. What is more, stub-objc.c could use a few
+ prototypes. */
+extern tree lookup_interface (tree);
+extern tree is_class_name (tree);
+extern tree objc_is_object_ptr (tree);
+extern void objc_check_decl (tree);
+extern int objc_comptypes (tree, tree, int);
+extern tree objc_message_selector (void);
+extern tree lookup_objc_ivar (tree);
+extern void *get_current_scope (void);
+extern void objc_mark_locals_volatile (void *);
+
+/* In c-ppoutput.c */
+extern void init_pp_output (FILE *);
+extern void preprocess_file (cpp_reader *);
+extern void pp_file_change (const struct line_map *);
+extern void pp_dir_change (cpp_reader *, const char *);
#endif /* ! GCC_C_COMMON_H */
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