/* Definitions for C parsing and type checking.
Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
- 1999, 2000, 2001 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GCC.
#include "c-common.h"
-/* Language-dependent contents of an identifier. */
+/* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
+ know how big it is. This is sanity-checked in c-decl.c. */
+#define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
+ (sizeof (struct c_common_identifier) + 3 * sizeof (void *))
-/* The limbo_value is used for block level extern declarations, which need
- to be type checked against subsequent extern declarations. They can't
- be referenced after they fall out of scope, so they can't be global.
-
- The rid_code field is used for keywords. It is in all
- lang_identifier nodes, because some keywords are only special in a
- particular context. */
-
-struct lang_identifier
-{
- struct c_common_identifier ignore;
- tree global_value, local_value, label_value, implicit_decl;
- tree error_locus, limbo_value;
-};
+/* For gc purposes, return the most likely link for the longest chain. */
+#define C_LANG_TREE_NODE_CHAIN_NEXT(T) \
+ ((union lang_tree_node *) \
+ (TREE_CODE (T) == INTEGER_TYPE ? TYPE_NEXT_VARIANT (T) \
+ : TREE_CODE (T) == COMPOUND_EXPR ? TREE_OPERAND (T, 1) \
+ : TREE_CHAIN (T)))
/* Language-specific declaration information. */
-struct lang_decl
+struct lang_decl GTY(())
{
- struct c_lang_decl base;
/* The return types and parameter types may have variable size.
This is a list of any SAVE_EXPRs that need to be evaluated to
compute those sizes. */
tree pending_sizes;
};
-/* Macros for access to language-specific slots in an identifier. */
-/* Each of these slots contains a DECL node or null. */
-
-/* This represents the value which the identifier has in the
- file-scope namespace. */
-#define IDENTIFIER_GLOBAL_VALUE(NODE) \
- (((struct lang_identifier *) (NODE))->global_value)
-/* This represents the value which the identifier has in the current
- scope. */
-#define IDENTIFIER_LOCAL_VALUE(NODE) \
- (((struct lang_identifier *) (NODE))->local_value)
-/* This represents the value which the identifier has as a label in
- the current label scope. */
-#define IDENTIFIER_LABEL_VALUE(NODE) \
- (((struct lang_identifier *) (NODE))->label_value)
-/* This records the extern decl of this identifier, if it has had one
- at any point in this compilation. */
-#define IDENTIFIER_LIMBO_VALUE(NODE) \
- (((struct lang_identifier *) (NODE))->limbo_value)
-/* This records the implicit function decl of this identifier, if it
- has had one at any point in this compilation. */
-#define IDENTIFIER_IMPLICIT_DECL(NODE) \
- (((struct lang_identifier *) (NODE))->implicit_decl)
-/* This is the last function in which we printed an "undefined variable"
- message for this identifier. Value is a FUNCTION_DECL or null. */
-#define IDENTIFIER_ERROR_LOCUS(NODE) \
- (((struct lang_identifier *) (NODE))->error_locus)
-
-/* In identifiers, C uses the following fields in a special way:
- TREE_PUBLIC to record that there was a previous local extern decl.
- TREE_USED to record that such a decl was used.
- TREE_ADDRESSABLE to record that the address of such a decl was used. */
-
/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
-#define C_TYPE_FIELDS_READONLY(type) TREE_LANG_FLAG_1 (type)
+#define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */
-#define C_TYPE_FIELDS_VOLATILE(type) TREE_LANG_FLAG_2 (type)
+#define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
/* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
nonzero if the definition of the type has already started. */
-#define C_TYPE_BEING_DEFINED(type) TYPE_LANG_FLAG_0 (type)
+#define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
+
+/* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
+ declarations whose type would be completed by completing that type. */
+#define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
/* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
keyword. C_RID_CODE (node) is then the RID_* value of the keyword,
and C_RID_YYCODE is the token number wanted by Yacc. */
-#define C_IS_RESERVED_WORD(id) TREE_LANG_FLAG_0 (id)
-
-/* This function was declared inline. This flag controls the linkage
- semantics of 'inline'; whether or not the function is inlined is
- controlled by DECL_INLINE. */
-#define DECL_DECLARED_INLINE_P(NODE) \
- (DECL_LANG_SPECIFIC (NODE)->base.declared_inline)
+#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
-/* In a RECORD_TYPE, a sorted array of the fields of the type. */
-struct lang_type
+struct lang_type GTY(())
{
- int len;
- tree elts[1];
+ /* In a RECORD_TYPE, a sorted array of the fields of the type. */
+ struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields"))) s;
+ /* In an ENUMERAL_TYPE, the min and max values. */
+ tree enum_min;
+ tree enum_max;
};
/* Record whether a type or decl was written with nonconstant size.
Note that TYPE_SIZE may have simplified to a constant. */
-#define C_TYPE_VARIABLE_SIZE(type) TYPE_LANG_FLAG_1 (type)
-#define C_DECL_VARIABLE_SIZE(type) DECL_LANG_FLAG_0 (type)
-
-#if 0 /* Not used. */
-/* Record whether a decl for a function or function pointer has
- already been mentioned (in a warning) because it was called
- but didn't have a prototype. */
-#define C_MISSING_PROTOTYPE_WARNED(decl) DECL_LANG_FLAG_2(decl)
-#endif
+#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
+#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
/* Store a value in that field. */
-#define C_SET_EXP_ORIGINAL_CODE(exp, code) \
- (TREE_COMPLEXITY (exp) = (int) (code))
+#define C_SET_EXP_ORIGINAL_CODE(EXP, CODE) \
+ (TREE_COMPLEXITY (EXP) = (int) (CODE))
/* Record whether a typedef for type `int' was actually `signed int'. */
-#define C_TYPEDEF_EXPLICITLY_SIGNED(exp) DECL_LANG_FLAG_1 ((exp))
+#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
+
+/* For a FUNCTION_DECL, nonzero if it was defined without an explicit
+ return type. */
+#define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
+
+/* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
+#define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
+
+/* For any decl, nonzero if it is bound in the externals scope and
+ pop_scope mustn't chain it into any higher block. */
+#define C_DECL_IN_EXTERNAL_SCOPE(EXP) DECL_LANG_FLAG_3 (EXP)
-/* Nonzero for a declaration of a built in function if there has been no
- occasion that would declare the function in ordinary C.
- Using the function draws a pedantic warning in this case. */
-#define C_DECL_ANTICIPATED(exp) DECL_LANG_FLAG_3 ((exp))
+/* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
+ been declared. */
+#define C_DECL_DECLARED_BUILTIN(EXP) DECL_LANG_FLAG_4 (EXP)
+
+/* Record whether a decl was declared register. This is strictly a
+ front-end flag, whereas DECL_REGISTER is used for code generation;
+ they may differ for structures with volatile fields. */
+#define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_5 (EXP)
+
+/* Nonzero for a decl which either doesn't exist or isn't a prototype.
+ N.B. Could be simplified if all built-in decls had complete prototypes
+ (but this is presently difficult because some of them need FILE*). */
+#define C_DECL_ISNT_PROTOTYPE(EXP) \
+ (EXP == 0 \
+ || (TYPE_ARG_TYPES (TREE_TYPE (EXP)) == 0 \
+ && !DECL_BUILT_IN (EXP)))
/* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
TYPE_ARG_TYPES for functions with prototypes, but created for functions
without prototypes. */
#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_BINFO (NODE)
-\f
-/* in c-lang.c and objc-act.c */
-extern tree lookup_interface PARAMS ((tree));
-extern tree is_class_name PARAMS ((tree));
-extern void maybe_objc_check_decl PARAMS ((tree));
-extern void finish_file PARAMS ((void));
-extern int maybe_objc_comptypes PARAMS ((tree, tree, int));
-extern tree maybe_building_objc_message_expr PARAMS ((void));
-extern int recognize_objc_keyword PARAMS ((void));
-extern tree lookup_objc_ivar PARAMS ((tree));
+/* Save and restore the variables in this file and elsewhere
+ that keep track of the progress of compilation of the current function.
+ Used for nested functions. */
+
+struct language_function GTY(())
+{
+ struct c_language_function base;
+ int returns_value;
+ int returns_null;
+ int returns_abnormally;
+ int warn_about_return_type;
+ int extern_inline;
+ int x_in_iteration_stmt;
+ int x_in_case_stmt;
+};
+
\f
/* in c-parse.in */
-extern void c_parse_init PARAMS ((void));
-extern int yyparse_1 PARAMS ((void));
+extern void c_parse_init (void);
/* in c-aux-info.c */
-extern void gen_aux_info_record PARAMS ((tree, int, int, int));
+extern void gen_aux_info_record (tree, int, int, int);
/* in c-decl.c */
-extern tree build_array_declarator PARAMS ((tree, tree, int, int));
-extern tree build_enumerator PARAMS ((tree, tree));
+extern int c_in_iteration_stmt;
+extern int c_in_case_stmt;
+
+extern int global_bindings_p (void);
+extern tree getdecls (void);
+extern void push_scope (void);
+extern tree pop_scope (void);
+extern void insert_block (tree);
+extern tree pushdecl (tree);
+extern void c_expand_body (tree);
+
+extern void c_init_decl_processing (void);
+extern void c_dup_lang_specific_decl (tree);
+extern void c_print_identifier (FILE *, tree, int);
+extern tree build_array_declarator (tree, tree, int, int);
+extern tree build_enumerator (tree, tree);
+extern void check_for_loop_decls (void);
+extern void mark_forward_parm_decls (void);
+extern int complete_array_type (tree, tree, int);
+extern void declare_parm_level (void);
+extern void undeclared_variable (tree);
+extern tree declare_label (tree);
+extern tree define_label (location_t, tree);
+extern void finish_decl (tree, tree, tree);
+extern tree finish_enum (tree, tree, tree);
+extern void finish_function (void);
+extern tree finish_struct (tree, tree, tree);
+extern tree get_parm_info (bool);
+extern tree grokfield (tree, tree, tree);
+extern tree groktypename (tree);
+extern tree groktypename_in_parm_context (tree);
+extern tree implicitly_declare (tree);
+extern void keep_next_level (void);
+extern tree lookup_name (tree);
+extern void pending_xref_error (void);
+extern void c_push_function_context (struct function *);
+extern void c_pop_function_context (struct function *);
+extern void push_parm_decl (tree);
+extern tree pushdecl_top_level (tree);
+extern tree set_array_declarator_type (tree, tree, int);
+extern void shadow_tag (tree);
+extern void shadow_tag_warned (tree, int);
+extern tree start_enum (tree);
+extern int start_function (tree, tree, tree);
+extern tree start_decl (tree, tree, int, tree);
+extern tree start_struct (enum tree_code, tree);
+extern void store_parm_decls (void);
+extern tree xref_tag (enum tree_code, tree);
+extern tree c_begin_compound_stmt (void);
+extern void c_static_assembler_name (tree);
+extern tree make_pointer_declarator (tree, tree);
+
+/* in c-objc-common.c */
+extern int c_disregard_inline_limits (tree);
+extern int c_cannot_inline_tree_fn (tree *);
+extern bool c_objc_common_init (void);
+extern bool c_missing_noreturn_ok_p (tree);
+extern tree c_objc_common_truthvalue_conversion (tree expr);
+extern void c_objc_common_finish_file (void);
+extern int defer_fn (tree);
+extern bool c_warn_unused_global_decl (tree);
#define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \
- c_build_qualified_type (TYPE, \
+ c_build_qualified_type ((TYPE), \
((CONST_P) ? TYPE_QUAL_CONST : 0) | \
((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
-extern int c_decode_option PARAMS ((int, char **));
-extern void c_mark_varargs PARAMS ((void));
-extern void check_for_loop_decls PARAMS ((void));
-extern tree check_identifier PARAMS ((tree, tree));
-extern void clear_parm_order PARAMS ((void));
-extern int complete_array_type PARAMS ((tree, tree, int));
-extern void declare_parm_level PARAMS ((int));
-extern tree define_label PARAMS ((const char *, int,
- tree));
-extern void delete_block PARAMS ((tree));
-extern void finish_decl PARAMS ((tree, tree, tree));
-extern void finish_decl_top_level PARAMS ((tree, tree, tree));
-extern tree finish_enum PARAMS ((tree, tree, tree));
-extern void finish_function PARAMS ((int));
-extern tree finish_struct PARAMS ((tree, tree, tree));
-extern tree get_parm_info PARAMS ((int));
-extern tree grokfield PARAMS ((const char *, int, tree, tree, tree));
-extern tree groktypename PARAMS ((tree));
-extern tree groktypename_in_parm_context PARAMS ((tree));
-extern tree implicitly_declare PARAMS ((tree));
-extern void implicit_decl_warning PARAMS ((tree));
-extern int in_parm_level_p PARAMS ((void));
-extern void keep_next_level PARAMS ((void));
-extern int kept_level_p PARAMS ((void));
-extern tree lookup_name PARAMS ((tree));
-extern tree lookup_name_current_level PARAMS ((tree));
-extern tree lookup_name_current_level_global PARAMS ((tree));
-extern void parmlist_tags_warning PARAMS ((void));
-extern void pending_xref_error PARAMS ((void));
-extern void mark_c_function_context PARAMS ((struct function *));
-extern void push_c_function_context PARAMS ((struct function *));
-extern void pop_c_function_context PARAMS ((struct function *));
-extern void pop_label_level PARAMS ((void));
-extern void push_label_level PARAMS ((void));
-extern void push_parm_decl PARAMS ((tree));
-extern tree pushdecl_top_level PARAMS ((tree));
-extern void pushtag PARAMS ((tree, tree));
-extern tree set_array_declarator_type PARAMS ((tree, tree, int));
-extern tree shadow_label PARAMS ((tree));
-extern void shadow_record_fields PARAMS ((tree));
-extern void shadow_tag PARAMS ((tree));
-extern void shadow_tag_warned PARAMS ((tree, int));
-extern tree start_enum PARAMS ((tree));
-extern int start_function PARAMS ((tree, tree, tree));
-extern tree start_decl PARAMS ((tree, tree, int,
- tree));
-extern tree start_struct PARAMS ((enum tree_code, tree));
-extern void store_parm_decls PARAMS ((void));
-extern tree xref_tag PARAMS ((enum tree_code, tree));
-extern tree c_begin_compound_stmt PARAMS ((void));
-extern void c_expand_decl_stmt PARAMS ((tree));
+
+#define c_sizeof_nowarn(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 0)
/* in c-typeck.c */
-extern tree require_complete_type PARAMS ((tree));
-extern int comptypes PARAMS ((tree, tree));
-extern tree c_sizeof_nowarn PARAMS ((tree));
-extern tree c_size_in_bytes PARAMS ((tree));
-extern tree build_component_ref PARAMS ((tree, tree));
-extern tree build_indirect_ref PARAMS ((tree, const char *));
-extern tree build_array_ref PARAMS ((tree, tree));
-extern tree build_external_ref PARAMS ((tree, int));
-extern tree parser_build_binary_op PARAMS ((enum tree_code,
- tree, tree));
-extern void readonly_warning PARAMS ((tree, const char *));
-extern tree build_conditional_expr PARAMS ((tree, tree, tree));
-extern tree build_compound_expr PARAMS ((tree));
-extern tree c_cast_expr PARAMS ((tree, tree));
-extern tree build_c_cast PARAMS ((tree, tree));
-extern tree build_modify_expr PARAMS ((tree, enum tree_code,
- tree));
-extern void store_init_value PARAMS ((tree, tree));
-extern void error_init PARAMS ((const char *));
-extern void pedwarn_init PARAMS ((const char *));
-extern void start_init PARAMS ((tree, tree, int));
-extern void finish_init PARAMS ((void));
-extern void really_start_incremental_init PARAMS ((tree));
-extern void push_init_level PARAMS ((int));
-extern tree pop_init_level PARAMS ((int));
-extern void set_init_index PARAMS ((tree, tree));
-extern void set_init_label PARAMS ((tree));
-extern void process_init_element PARAMS ((tree));
-extern void pedwarn_c99 PARAMS ((const char *, ...))
- ATTRIBUTE_PRINTF_1;
-extern tree c_start_case PARAMS ((tree));
-extern void c_finish_case PARAMS ((void));
-extern tree simple_asm_stmt PARAMS ((tree));
-extern tree build_asm_stmt PARAMS ((tree, tree, tree,
- tree, tree));
+
+extern tree require_complete_type (tree);
+extern int same_translation_unit_p (tree, tree);
+extern int comptypes (tree, tree);
+extern tree c_size_in_bytes (tree);
+extern bool c_mark_addressable (tree);
+extern void c_incomplete_type_error (tree, tree);
+extern tree c_type_promotes_to (tree);
+extern tree composite_type (tree, tree);
+extern tree build_component_ref (tree, tree);
+extern tree build_indirect_ref (tree, const char *);
+extern tree build_array_ref (tree, tree);
+extern tree build_external_ref (tree, int);
+extern tree parser_build_binary_op (enum tree_code, tree, tree);
+extern int c_tree_expr_nonnegative_p (tree);
+extern void readonly_error (tree, const char *);
+extern tree build_conditional_expr (tree, tree, tree);
+extern tree build_compound_expr (tree);
+extern tree c_cast_expr (tree, tree);
+extern tree build_c_cast (tree, tree);
+extern tree build_modify_expr (tree, enum tree_code, tree);
+extern void store_init_value (tree, tree);
+extern void error_init (const char *);
+extern void pedwarn_init (const char *);
+extern void start_init (tree, tree, int);
+extern void finish_init (void);
+extern void really_start_incremental_init (tree);
+extern void push_init_level (int);
+extern tree pop_init_level (int);
+extern void set_init_index (tree, tree);
+extern void set_init_label (tree);
+extern void process_init_element (tree);
+extern tree build_compound_literal (tree, tree);
+extern void pedwarn_c90 (const char *, ...) ATTRIBUTE_PRINTF_1;
+extern void pedwarn_c99 (const char *, ...) ATTRIBUTE_PRINTF_1;
+extern tree c_start_case (tree);
+extern void c_finish_case (void);
+extern tree build_asm_expr (tree, tree, tree, tree, bool);
+extern tree build_asm_stmt (tree, tree);
+extern tree c_convert_parm_for_inlining (tree, tree, tree, int);
+extern int c_types_compatible_p (tree, tree);
+extern tree build_offsetof (tree, tree);
/* Set to 0 at beginning of a function definition, set to 1 if
a return statement that specifies a return value is seen. */
extern int current_function_returns_null;
-/* Nonzero means the expression being parsed will never be evaluated.
- This is a count, since unevaluated expressions can nest. */
-
-extern int skip_evaluation;
-
-/* Nonzero means `$' can be in an identifier. */
-
-extern int dollars_in_ident;
-
-/* Nonzero means allow type mismatches in conditional expressions;
- just make their values `void'. */
-
-extern int flag_cond_mismatch;
-
-/* Nonzero means don't recognize the keyword `asm'. */
-
-extern int flag_no_asm;
-
-/* Nonzero means warn about implicit declarations. */
-
-extern int warn_implicit;
-
-/* Nonzero means warn for all old-style non-prototype function decls. */
-
-extern int warn_strict_prototypes;
-
-/* Nonzero means warn about multiple (redundant) decls for the same single
- variable or function. */
-
-extern int warn_redundant_decls;
-
-/* 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_nested_externs;
-
-/* Nonzero means warn about pointer casts that can drop a type qualifier
- from the pointer target type. */
-
-extern int warn_cast_qual;
-
-/* 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 warn_bad_function_cast;
-
-/* Warn about traditional constructs whose meanings changed in ANSI C. */
-
-extern int warn_traditional;
-
-/* Warn about a subscript that has type char. */
-
-extern int warn_char_subscripts;
-
-/* Warn if main is suspicious. */
-
-extern int warn_main;
-
-/* Nonzero means to allow single precision math even if we're generally
- being traditional. */
-extern int flag_allow_single_precision;
-
-/* Warn if initializer is not completely bracketed. */
-
-extern int warn_missing_braces;
-
-/* Warn about comparison of signed and unsigned values. */
-
-extern int warn_sign_compare;
-
-/* Warn about testing equality of floating point numbers. */
-
-extern int warn_float_equal;
-
-/* Warn about multicharacter constants. */
+/* Set to 0 at beginning of a function definition, set to 1 if
+ a call to a noreturn function is seen. */
-extern int warn_multichar;
+extern int current_function_returns_abnormally;
/* Nonzero means we are reading code that came from a system header file. */
extern int system_header_p;
-/* Warn about implicit declarations. 1 = warning, 2 = error. */
-extern int mesg_implicit_function_declaration;
+/* True means global_bindings_p should return false even if the scope stack
+ says we are in file scope. */
+
+extern bool c_override_global_bindings_to_false;
/* In c-decl.c */
-extern void finish_incomplete_decl PARAMS ((tree));
+extern void c_finish_incomplete_decl (tree);
+extern void *get_current_scope (void);
+extern void objc_mark_locals_volatile (void *);
+extern void c_write_global_declarations (void);
+
+extern GTY(()) tree static_ctors;
+extern GTY(()) tree static_dtors;
+
+/* In order for the format checking to accept the C frontend
+ diagnostic framework extensions, you must include this file before
+ toplev.h, not after. */
+#define GCC_DIAG_STYLE __gcc_cdiag__
#endif /* ! GCC_C_TREE_H */
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