/* Definitions for C parsing and type checking.
Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GCC.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
#ifndef GCC_C_TREE_H
#define GCC_C_TREE_H
#include "c-common.h"
+#include "toplev.h"
#include "diagnostic.h"
/* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
#define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
(sizeof (struct c_common_identifier) + 3 * sizeof (void *))
-/* 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 GTY(())
{
- /* 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;
+ char dummy;
};
/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
/* In an ENUMERAL_TYPE, the min and max values. */
tree enum_min;
tree enum_max;
+ /* In a RECORD_TYPE, information specific to Objective-C, such
+ as a list of adopted protocols or a pointer to a corresponding
+ @interface. See objc/objc-act.h for details. */
+ tree objc_info;
};
/* Record whether a type or decl was written with nonconstant size.
/* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
been declared. */
-#define C_DECL_DECLARED_BUILTIN(EXP) DECL_LANG_FLAG_3 (EXP)
+#define C_DECL_DECLARED_BUILTIN(EXP) \
+ DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
+
+/* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
+ built-in prototype and does not have a non-built-in prototype. */
+#define C_DECL_BUILTIN_PROTOTYPE(EXP) \
+ DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (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_4 (EXP)
+/* Record whether a decl was used in an expression anywhere except an
+ unevaluated operand of sizeof / typeof / alignof. This is only
+ used for functions declared static but not defined, though outside
+ sizeof and typeof it is set for other function decls as well. */
+#define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
+
+/* Record whether a label was defined in a statement expression which
+ has finished and so can no longer be jumped to. */
+#define C_DECL_UNJUMPABLE_STMT_EXPR(EXP) \
+ DECL_LANG_FLAG_6 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a label was the subject of a goto from outside the
+ current level of statement expression nesting and so cannot be
+ defined right now. */
+#define C_DECL_UNDEFINABLE_STMT_EXPR(EXP) \
+ DECL_LANG_FLAG_7 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a label was defined in the scope of an identifier
+ with variably modified type which has finished and so can no longer
+ be jumped to. */
+#define C_DECL_UNJUMPABLE_VM(EXP) \
+ DECL_LANG_FLAG_3 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a label was the subject of a goto from outside the
+ current level of scopes of identifiers with variably modified type
+ and so cannot be defined right now. */
+#define C_DECL_UNDEFINABLE_VM(EXP) \
+ DECL_LANG_FLAG_5 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a variable has been declared threadprivate by
+ #pragma omp threadprivate. */
+#define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
+
/* 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*). */
/* The value of the expression. */
tree value;
/* Record the original binary operator of an expression, which may
- have been changed by fold, STRING_CST for unparenthesised string
+ have been changed by fold, STRING_CST for unparenthesized string
constants, or ERROR_MARK for other expressions (including
parenthesized expressions). */
enum tree_code original_code;
};
+/* A kind of type specifier. Note that this information is currently
+ only used to distinguish tag definitions, tag references and typeof
+ uses. */
+enum c_typespec_kind {
+ /* A reserved keyword type specifier. */
+ ctsk_resword,
+ /* A reference to a tag, previously declared, such as "struct foo".
+ This includes where the previous declaration was as a different
+ kind of tag, in which case this is only valid if shadowing that
+ tag in an inner scope. */
+ ctsk_tagref,
+ /* A reference to a tag, not previously declared in a visible
+ scope. */
+ ctsk_tagfirstref,
+ /* A definition of a tag such as "struct foo { int a; }". */
+ ctsk_tagdef,
+ /* A typedef name. */
+ ctsk_typedef,
+ /* An ObjC-specific kind of type specifier. */
+ ctsk_objc,
+ /* A typeof specifier. */
+ ctsk_typeof
+};
+
+/* A type specifier: this structure is created in the parser and
+ passed to declspecs_add_type only. */
+struct c_typespec {
+ /* What kind of type specifier this is. */
+ enum c_typespec_kind kind;
+ /* The specifier itself. */
+ tree spec;
+};
+
+/* A storage class specifier. */
+enum c_storage_class {
+ csc_none,
+ csc_auto,
+ csc_extern,
+ csc_register,
+ csc_static,
+ csc_typedef
+};
+
+/* A type specifier keyword "void", "_Bool", "char", "int", "float",
+ "double", or none of these. */
+enum c_typespec_keyword {
+ cts_none,
+ cts_void,
+ cts_bool,
+ cts_char,
+ cts_int,
+ cts_float,
+ cts_double,
+ cts_dfloat32,
+ cts_dfloat64,
+ cts_dfloat128
+};
+
+/* A sequence of declaration specifiers in C. */
+struct c_declspecs {
+ /* The type specified, if a single type specifier such as a struct,
+ union or enum specifier, typedef name or typeof specifies the
+ whole type, or NULL_TREE if none or a keyword such as "void" or
+ "char" is used. Does not include qualifiers. */
+ tree type;
+ /* The attributes from a typedef decl. */
+ tree decl_attr;
+ /* When parsing, the attributes. Outside the parser, this will be
+ NULL; attributes (possibly from multiple lists) will be passed
+ separately. */
+ tree attrs;
+ /* Any type specifier keyword used such as "int", not reflecting
+ modifiers such as "short", or cts_none if none. */
+ enum c_typespec_keyword typespec_word;
+ /* The storage class specifier, or csc_none if none. */
+ enum c_storage_class storage_class;
+ /* Whether any declaration specifiers have been seen at all. */
+ BOOL_BITFIELD declspecs_seen_p : 1;
+ /* Whether a type specifier has been seen. */
+ BOOL_BITFIELD type_seen_p : 1;
+ /* Whether something other than a storage class specifier or
+ attribute has been seen. This is used to warn for the
+ obsolescent usage of storage class specifiers other than at the
+ start of the list. (Doing this properly would require function
+ specifiers to be handled separately from storage class
+ specifiers.) */
+ BOOL_BITFIELD non_sc_seen_p : 1;
+ /* Whether the type is specified by a typedef or typeof name. */
+ BOOL_BITFIELD typedef_p : 1;
+ /* Whether a struct, union or enum type either had its content
+ defined by a type specifier in the list or was the first visible
+ declaration of its tag. */
+ BOOL_BITFIELD tag_defined_p : 1;
+ /* Whether the type is explicitly "signed" or specified by a typedef
+ whose type is explicitly "signed". */
+ BOOL_BITFIELD explicit_signed_p : 1;
+ /* Whether the specifiers include a deprecated typedef. */
+ BOOL_BITFIELD deprecated_p : 1;
+ /* Whether the type defaulted to "int" because there were no type
+ specifiers. */
+ BOOL_BITFIELD default_int_p;
+ /* Whether "long" was specified. */
+ BOOL_BITFIELD long_p : 1;
+ /* Whether "long" was specified more than once. */
+ BOOL_BITFIELD long_long_p : 1;
+ /* Whether "short" was specified. */
+ BOOL_BITFIELD short_p : 1;
+ /* Whether "signed" was specified. */
+ BOOL_BITFIELD signed_p : 1;
+ /* Whether "unsigned" was specified. */
+ BOOL_BITFIELD unsigned_p : 1;
+ /* Whether "complex" was specified. */
+ BOOL_BITFIELD complex_p : 1;
+ /* Whether "inline" was specified. */
+ BOOL_BITFIELD inline_p : 1;
+ /* Whether "__thread" was specified. */
+ BOOL_BITFIELD thread_p : 1;
+ /* Whether "const" was specified. */
+ BOOL_BITFIELD const_p : 1;
+ /* Whether "volatile" was specified. */
+ BOOL_BITFIELD volatile_p : 1;
+ /* Whether "restrict" was specified. */
+ BOOL_BITFIELD restrict_p : 1;
+};
+
+/* The various kinds of declarators in C. */
+enum c_declarator_kind {
+ /* An identifier. */
+ cdk_id,
+ /* A function. */
+ cdk_function,
+ /* An array. */
+ cdk_array,
+ /* A pointer. */
+ cdk_pointer,
+ /* Parenthesized declarator with nested attributes. */
+ cdk_attrs
+};
+
+/* Information about the parameters in a function declarator. */
+struct c_arg_info {
+ /* A list of parameter decls. */
+ tree parms;
+ /* A list of structure, union and enum tags defined. */
+ tree tags;
+ /* A list of argument types to go in the FUNCTION_TYPE. */
+ tree types;
+ /* A list of non-parameter decls (notably enumeration constants)
+ defined with the parameters. */
+ tree others;
+ /* A list of VLA sizes from the parameters. In a function
+ definition, these are used to ensure that side-effects in sizes
+ of arrays converted to pointers (such as a parameter int i[n++])
+ take place; otherwise, they are ignored. */
+ tree pending_sizes;
+ /* True when these arguments had [*]. */
+ BOOL_BITFIELD had_vla_unspec : 1;
+};
+
+/* A declarator. */
+struct c_declarator {
+ /* The kind of declarator. */
+ enum c_declarator_kind kind;
+ /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
+ struct c_declarator *declarator;
+ location_t id_loc; /* Currently only set for cdk_id. */
+ union {
+ /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
+ declarator. */
+ tree id;
+ /* For functions. */
+ struct c_arg_info *arg_info;
+ /* For arrays. */
+ struct {
+ /* The array dimension, or NULL for [] and [*]. */
+ tree dimen;
+ /* The qualifiers inside []. */
+ int quals;
+ /* The attributes (currently ignored) inside []. */
+ tree attrs;
+ /* Whether [static] was used. */
+ BOOL_BITFIELD static_p : 1;
+ /* Whether [*] was used. */
+ BOOL_BITFIELD vla_unspec_p : 1;
+ } array;
+ /* For pointers, the qualifiers on the pointer type. */
+ int pointer_quals;
+ /* For attributes. */
+ tree attrs;
+ } u;
+};
+
+/* A type name. */
+struct c_type_name {
+ /* The declaration specifiers. */
+ struct c_declspecs *specs;
+ /* The declarator. */
+ struct c_declarator *declarator;
+};
+
+/* A parameter. */
+struct c_parm {
+ /* The declaration specifiers, minus any prefix attributes. */
+ struct c_declspecs *specs;
+ /* The attributes. */
+ tree attrs;
+ /* The declarator. */
+ struct c_declarator *declarator;
+};
+
/* 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. */
tree x_break_label;
tree x_cont_label;
struct c_switch * GTY((skip)) x_switch_stack;
- tree arg_info;
+ struct c_arg_info * GTY((skip)) arg_info;
int returns_value;
int returns_null;
int returns_abnormally;
int extern_inline;
};
+/* Save lists of labels used or defined in particular contexts.
+ Allocated on the parser obstack. */
+
+struct c_label_list
+{
+ /* The label at the head of the list. */
+ tree label;
+ /* The rest of the list. */
+ struct c_label_list *next;
+};
+
+/* Statement expression context. */
+
+struct c_label_context_se
+{
+ /* The labels defined at this level of nesting. */
+ struct c_label_list *labels_def;
+ /* The labels used at this level of nesting. */
+ struct c_label_list *labels_used;
+ /* The next outermost context. */
+ struct c_label_context_se *next;
+};
+
+/* Context of variably modified declarations. */
+
+struct c_label_context_vm
+{
+ /* The labels defined at this level of nesting. */
+ struct c_label_list *labels_def;
+ /* The labels used at this level of nesting. */
+ struct c_label_list *labels_used;
+ /* The scope of this context. Multiple contexts may be at the same
+ numbered scope, since each variably modified declaration starts a
+ new context. */
+ unsigned scope;
+ /* The next outermost context. */
+ struct c_label_context_vm *next;
+};
+
\f
-/* in c-parse.in */
+/* in c-parser.c */
extern void c_parse_init (void);
/* in c-aux-info.c */
extern void gen_aux_info_record (tree, int, int, int);
/* in c-decl.c */
+extern struct obstack parser_obstack;
extern tree c_break_label;
extern tree c_cont_label;
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, bool, bool);
+extern int quals_from_declspecs (const struct c_declspecs *);
+extern struct c_declarator *build_array_declarator (tree, struct c_declspecs *,
+ bool, bool);
extern tree build_enumerator (tree, tree);
-extern void check_for_loop_decls (void);
+extern tree 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 void undeclared_variable (tree, location_t);
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 void split_specs_attrs (tree, tree *, tree *);
-extern tree groktypename (tree);
-extern tree groktypename_in_parm_context (tree);
-extern tree grokparm (tree);
+extern struct c_arg_info *get_parm_info (bool);
+extern tree grokfield (struct c_declarator *, struct c_declspecs *, tree);
+extern tree groktypename (struct c_type_name *);
+extern tree grokparm (const struct c_parm *);
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_inner (tree, tree, bool);
+extern void push_parm_decl (const struct c_parm *);
+extern struct c_declarator *set_array_declarator_inner (struct c_declarator *,
+ struct c_declarator *,
+ bool);
extern tree builtin_function (const char *, tree, int, enum built_in_class,
const char *, tree);
-extern void shadow_tag (tree);
-extern void shadow_tag_warned (tree, int);
+extern void shadow_tag (const struct c_declspecs *);
+extern void shadow_tag_warned (const struct c_declspecs *, int);
extern tree start_enum (tree);
-extern int start_function (tree, tree, tree);
-extern tree start_decl (tree, tree, bool, tree);
+extern int start_function (struct c_declspecs *, struct c_declarator *, tree);
+extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool,
+ tree);
extern tree start_struct (enum tree_code, tree);
extern void store_parm_decls (void);
-extern void store_parm_decls_from (tree);
+extern void store_parm_decls_from (struct c_arg_info *);
extern tree xref_tag (enum tree_code, tree);
+extern struct c_typespec parser_xref_tag (enum tree_code, tree);
extern int c_expand_decl (tree);
-extern tree build_c_parm (tree, tree, tree);
-extern tree build_attrs_declarator (tree, tree);
-extern tree build_function_declarator (tree, tree);
-extern tree make_pointer_declarator (tree, tree);
+extern struct c_parm *build_c_parm (struct c_declspecs *, tree,
+ struct c_declarator *);
+extern struct c_declarator *build_attrs_declarator (tree,
+ struct c_declarator *);
+extern struct c_declarator *build_function_declarator (struct c_arg_info *,
+ struct c_declarator *);
+extern struct c_declarator *build_id_declarator (tree);
+extern struct c_declarator *make_pointer_declarator (struct c_declspecs *,
+ struct c_declarator *);
+extern struct c_declspecs *build_null_declspecs (void);
+extern struct c_declspecs *declspecs_add_qual (struct c_declspecs *, tree);
+extern struct c_declspecs *declspecs_add_type (struct c_declspecs *,
+ struct c_typespec);
+extern struct c_declspecs *declspecs_add_scspec (struct c_declspecs *, tree);
+extern struct c_declspecs *declspecs_add_attrs (struct c_declspecs *, tree);
+extern struct c_declspecs *finish_declspecs (struct c_declspecs *);
/* in c-objc-common.c */
extern int c_disregard_inline_limits (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 int defer_fn (tree);
extern bool c_warn_unused_global_decl (tree);
extern void c_initialize_diagnostics (diagnostic_context *);
+extern bool c_vla_unspec_p (tree x, tree fn);
#define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \
c_build_qualified_type ((TYPE), \
((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
/* in c-typeck.c */
+extern int in_alignof;
+extern int in_sizeof;
+extern int in_typeof;
+
extern struct c_switch *c_switch_stack;
+extern struct c_label_context_se *label_context_stack_se;
+extern struct c_label_context_vm *label_context_stack_vm;
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_vla_type_p (tree);
extern bool c_mark_addressable (tree);
extern void c_incomplete_type_error (tree, tree);
extern tree c_type_promotes_to (tree);
+extern struct c_expr default_function_array_conversion (struct c_expr);
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 build_external_ref (tree, int, location_t);
+extern void pop_maybe_used (bool);
+extern struct c_expr c_expr_sizeof_expr (struct c_expr);
+extern struct c_expr c_expr_sizeof_type (struct c_type_name *);
+extern struct c_expr parser_build_unary_op (enum tree_code, struct c_expr);
extern struct c_expr parser_build_binary_op (enum tree_code, struct c_expr,
struct c_expr);
-extern void readonly_error (tree, const char *);
extern tree build_conditional_expr (tree, tree, tree);
extern tree build_compound_expr (tree, tree);
-extern tree c_cast_expr (tree, tree);
+extern tree c_cast_expr (struct c_type_name *, 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 set_init_label (tree);
extern void process_init_element (struct c_expr);
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 (tree);
extern tree build_asm_expr (tree, tree, tree, tree, bool);
extern tree c_finish_bc_stmt (tree *, bool);
extern tree c_finish_goto_label (tree);
extern tree c_finish_goto_ptr (tree);
+extern void c_begin_vm_scope (unsigned int);
+extern void c_end_vm_scope (unsigned int);
+extern tree c_expr_to_decl (tree, bool *, bool *, bool *);
+extern tree c_begin_omp_parallel (void);
+extern tree c_finish_omp_parallel (tree, tree);
+extern tree c_finish_omp_clauses (tree);
/* Set to 0 at beginning of a function definition, set to 1 if
a return statement that specifies a return value is seen. */
/* 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__
+#if GCC_VERSION >= 4001
+#define ATTRIBUTE_GCC_CDIAG(m, n) __attribute__ ((__format__ (GCC_DIAG_STYLE, m ,n))) ATTRIBUTE_NONNULL(m)
+#else
+#define ATTRIBUTE_GCC_CDIAG(m, n) ATTRIBUTE_NONNULL(m)
+#endif
+
+extern void pedwarn_c90 (const char *, ...) ATTRIBUTE_GCC_CDIAG(1,2);
+extern void pedwarn_c99 (const char *, ...) ATTRIBUTE_GCC_CDIAG(1,2);
#endif /* ! GCC_C_TREE_H */
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