/* Language-dependent hooks for C++.
- Copyright 2001, 2002 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2004 Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>
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. */
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include "config.h"
#include "system.h"
#include "toplev.h"
#include "langhooks.h"
#include "langhooks-def.h"
+#include "diagnostic.h"
+#include "debug.h"
+#include "cp-objcp-common.h"
+#include "hashtab.h"
enum c_language_kind c_language = clk_cxx;
+static void cp_init_ts (void);
-static HOST_WIDE_INT cxx_get_alias_set (tree);
-static bool ok_to_generate_alias_set_for_type (tree);
-static bool cxx_warn_unused_global_decl (tree);
-static tree cp_expr_size (tree);
-static size_t cp_tree_size (enum tree_code);
-static bool cp_var_mod_type_p (tree);
+/* Lang hooks common to C++ and ObjC++ are declared in cp/cp-objcp-common.h;
+ consequently, there should be very few hooks below. */
#undef LANG_HOOKS_NAME
#define LANG_HOOKS_NAME "GNU C++"
-#undef LANG_HOOKS_TREE_SIZE
-#define LANG_HOOKS_TREE_SIZE cp_tree_size
#undef LANG_HOOKS_INIT
#define LANG_HOOKS_INIT cxx_init
-#undef LANG_HOOKS_FINISH
-#define LANG_HOOKS_FINISH cxx_finish
-#undef LANG_HOOKS_CLEAR_BINDING_STACK
-#define LANG_HOOKS_CLEAR_BINDING_STACK pop_everything
-#undef LANG_HOOKS_INIT_OPTIONS
-#define LANG_HOOKS_INIT_OPTIONS c_common_init_options
-#undef LANG_HOOKS_HANDLE_OPTION
-#define LANG_HOOKS_HANDLE_OPTION c_common_handle_option
-#undef LANG_HOOKS_HANDLE_FILENAME
-#define LANG_HOOKS_HANDLE_FILENAME c_common_handle_filename
-#undef LANG_HOOKS_MISSING_ARGUMENT
-#define LANG_HOOKS_MISSING_ARGUMENT c_common_missing_argument
-#undef LANG_HOOKS_POST_OPTIONS
-#define LANG_HOOKS_POST_OPTIONS c_common_post_options
-#undef LANG_HOOKS_GET_ALIAS_SET
-#define LANG_HOOKS_GET_ALIAS_SET cxx_get_alias_set
-#undef LANG_HOOKS_EXPAND_CONSTANT
-#define LANG_HOOKS_EXPAND_CONSTANT cplus_expand_constant
-#undef LANG_HOOKS_EXPAND_EXPR
-#define LANG_HOOKS_EXPAND_EXPR cxx_expand_expr
-#undef LANG_HOOKS_SAFE_FROM_P
-#define LANG_HOOKS_SAFE_FROM_P c_safe_from_p
-#undef LANG_HOOKS_PARSE_FILE
-#define LANG_HOOKS_PARSE_FILE c_common_parse_file
-#undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
-#define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL cxx_dup_lang_specific_decl
-#undef LANG_HOOKS_UNSAVE_EXPR_NOW
-#define LANG_HOOKS_UNSAVE_EXPR_NOW cxx_unsave_expr_now
-#undef LANG_HOOKS_MAYBE_BUILD_CLEANUP
-#define LANG_HOOKS_MAYBE_BUILD_CLEANUP cxx_maybe_build_cleanup
-#undef LANG_HOOKS_TRUTHVALUE_CONVERSION
-#define LANG_HOOKS_TRUTHVALUE_CONVERSION c_common_truthvalue_conversion
-#undef LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES
-#define LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES cxx_insert_default_attributes
-#undef LANG_HOOKS_UNSAFE_FOR_REEVAL
-#define LANG_HOOKS_UNSAFE_FOR_REEVAL c_common_unsafe_for_reeval
-#undef LANG_HOOKS_SET_DECL_ASSEMBLER_NAME
-#define LANG_HOOKS_SET_DECL_ASSEMBLER_NAME mangle_decl
-#undef LANG_HOOKS_MARK_ADDRESSABLE
-#define LANG_HOOKS_MARK_ADDRESSABLE cxx_mark_addressable
-#undef LANG_HOOKS_PRINT_STATISTICS
-#define LANG_HOOKS_PRINT_STATISTICS cxx_print_statistics
-#undef LANG_HOOKS_PRINT_XNODE
-#define LANG_HOOKS_PRINT_XNODE cxx_print_xnode
-#undef LANG_HOOKS_PRINT_DECL
-#define LANG_HOOKS_PRINT_DECL cxx_print_decl
-#undef LANG_HOOKS_PRINT_TYPE
-#define LANG_HOOKS_PRINT_TYPE cxx_print_type
-#undef LANG_HOOKS_PRINT_IDENTIFIER
-#define LANG_HOOKS_PRINT_IDENTIFIER cxx_print_identifier
#undef LANG_HOOKS_DECL_PRINTABLE_NAME
#define LANG_HOOKS_DECL_PRINTABLE_NAME cxx_printable_name
-#undef LANG_HOOKS_PRINT_ERROR_FUNCTION
-#define LANG_HOOKS_PRINT_ERROR_FUNCTION cxx_print_error_function
-#undef LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL
-#define LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL cxx_warn_unused_global_decl
-#undef LANG_HOOKS_WRITE_GLOBALS
-#define LANG_HOOKS_WRITE_GLOBALS lhd_do_nothing
+#undef LANG_HOOKS_FOLD_OBJ_TYPE_REF
+#define LANG_HOOKS_FOLD_OBJ_TYPE_REF cp_fold_obj_type_ref
+#undef LANG_HOOKS_INIT_TS
+#define LANG_HOOKS_INIT_TS cp_init_ts
-
-#undef LANG_HOOKS_FUNCTION_INIT
-#define LANG_HOOKS_FUNCTION_INIT cxx_push_function_context
-#undef LANG_HOOKS_FUNCTION_FINAL
-#define LANG_HOOKS_FUNCTION_FINAL cxx_pop_function_context
-
-/* Attribute hooks. */
-#undef LANG_HOOKS_COMMON_ATTRIBUTE_TABLE
-#define LANG_HOOKS_COMMON_ATTRIBUTE_TABLE c_common_attribute_table
-#undef LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE
-#define LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE c_common_format_attribute_table
-#undef LANG_HOOKS_ATTRIBUTE_TABLE
-#define LANG_HOOKS_ATTRIBUTE_TABLE cxx_attribute_table
-
-#undef LANG_HOOKS_TREE_INLINING_WALK_SUBTREES
-#define LANG_HOOKS_TREE_INLINING_WALK_SUBTREES \
- cp_walk_subtrees
-#undef LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN
-#define LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN \
- cp_cannot_inline_tree_fn
-#undef LANG_HOOKS_TREE_INLINING_ADD_PENDING_FN_DECLS
-#define LANG_HOOKS_TREE_INLINING_ADD_PENDING_FN_DECLS \
- cp_add_pending_fn_decls
-#undef LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P
-#define LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P \
- cp_is_overload_p
-#undef LANG_HOOKS_TREE_INLINING_AUTO_VAR_IN_FN_P
-#define LANG_HOOKS_TREE_INLINING_AUTO_VAR_IN_FN_P \
- cp_auto_var_in_fn_p
-#undef LANG_HOOKS_TREE_INLINING_COPY_RES_DECL_FOR_INLINING
-#define LANG_HOOKS_TREE_INLINING_COPY_RES_DECL_FOR_INLINING \
- cp_copy_res_decl_for_inlining
-#undef LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P
-#define LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P anon_aggr_type_p
-#undef LANG_HOOKS_TREE_INLINING_VAR_MOD_TYPE_P
-#define LANG_HOOKS_TREE_INLINING_VAR_MOD_TYPE_P cp_var_mod_type_p
-#undef LANG_HOOKS_TREE_INLINING_START_INLINING
-#define LANG_HOOKS_TREE_INLINING_START_INLINING cp_start_inlining
-#undef LANG_HOOKS_TREE_INLINING_END_INLINING
-#define LANG_HOOKS_TREE_INLINING_END_INLINING cp_end_inlining
-#undef LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS
-#define LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS c_estimate_num_insns
-#undef LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN
-#define LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN cp_dump_tree
-#undef LANG_HOOKS_TREE_DUMP_TYPE_QUALS_FN
-#define LANG_HOOKS_TREE_DUMP_TYPE_QUALS_FN cp_type_quals
-#undef LANG_HOOKS_EXPR_SIZE
-#define LANG_HOOKS_EXPR_SIZE cp_expr_size
-
-#undef LANG_HOOKS_PREPARE_ASSEMBLE_VARIABLE
-#define LANG_HOOKS_PREPARE_ASSEMBLE_VARIABLE prepare_assemble_variable
-
-#undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
-#define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION expand_body
-#undef LANG_HOOKS_CALLGRAPH_LOWER_FUNCTION
-#define LANG_HOOKS_CALLGRAPH_LOWER_FUNCTION lower_function
-
-#undef LANG_HOOKS_MAKE_TYPE
-#define LANG_HOOKS_MAKE_TYPE cxx_make_type
-#undef LANG_HOOKS_TYPE_FOR_MODE
-#define LANG_HOOKS_TYPE_FOR_MODE c_common_type_for_mode
-#undef LANG_HOOKS_TYPE_FOR_SIZE
-#define LANG_HOOKS_TYPE_FOR_SIZE c_common_type_for_size
-#undef LANG_HOOKS_SIGNED_TYPE
-#define LANG_HOOKS_SIGNED_TYPE c_common_signed_type
-#undef LANG_HOOKS_UNSIGNED_TYPE
-#define LANG_HOOKS_UNSIGNED_TYPE c_common_unsigned_type
-#undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
-#define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE c_common_signed_or_unsigned_type
-#undef LANG_HOOKS_INCOMPLETE_TYPE_ERROR
-#define LANG_HOOKS_INCOMPLETE_TYPE_ERROR cxx_incomplete_type_error
-#undef LANG_HOOKS_TYPE_PROMOTES_TO
-#define LANG_HOOKS_TYPE_PROMOTES_TO cxx_type_promotes_to
-
-/* Each front end provides its own hooks, for toplev.c. */
+/* Each front end provides its own lang hook initializer. */
const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
/* Tree code classes. */
#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
-const char tree_code_type[] = {
+const enum tree_code_class tree_code_type[] = {
#include "tree.def"
- 'x',
+ tcc_exceptional,
#include "c-common.def"
- 'x',
+ tcc_exceptional,
#include "cp-tree.def"
};
#undef DEFTREECODE
};
#undef DEFTREECODE
-/* Check if a C++ type is safe for aliasing.
- Return TRUE if T safe for aliasing FALSE otherwise. */
-
-static bool
-ok_to_generate_alias_set_for_type (tree t)
-{
- if (TYPE_PTRMEMFUNC_P (t))
- return true;
- if (AGGREGATE_TYPE_P (t))
- {
- if ((TREE_CODE (t) == RECORD_TYPE) || (TREE_CODE (t) == UNION_TYPE))
- {
- tree fields;
- /* Backend-created structs are safe. */
- if (! CLASS_TYPE_P (t))
- return true;
- /* PODs are safe. */
- if (! CLASSTYPE_NON_POD_P(t))
- return true;
- /* Classes with virtual baseclasses are not. */
- if (TYPE_USES_VIRTUAL_BASECLASSES (t))
- return false;
- /* Recursively check the base classes. */
- if (TYPE_BINFO (t) != NULL && TYPE_BINFO_BASETYPES (t) != NULL)
- {
- int i;
- for (i = 0; i < TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (t)); i++)
- {
- tree binfo = TREE_VEC_ELT (TYPE_BINFO_BASETYPES (t), i);
- if (!ok_to_generate_alias_set_for_type (BINFO_TYPE (binfo)))
- return false;
- }
- }
- /* Check all the fields. */
- for (fields = TYPE_FIELDS (t); fields; fields = TREE_CHAIN (fields))
- {
- if (TREE_CODE (fields) != FIELD_DECL)
- continue;
- if (! ok_to_generate_alias_set_for_type (TREE_TYPE (fields)))
- return false;
- }
- return true;
- }
- else if (TREE_CODE (t) == ARRAY_TYPE)
- return ok_to_generate_alias_set_for_type (TREE_TYPE (t));
- else
- /* This should never happen, we dealt with all the aggregate
- types that can appear in C++ above. */
- abort ();
- }
- else
- return true;
-}
+/* Lang hook routines common to C++ and ObjC++ appear in cp/cp-objcp-common.c;
+ there should be very few routines below. */
-/* Special routine to get the alias set for C++. */
+/* The following function does something real, but only in Objective-C++. */
-static HOST_WIDE_INT
-cxx_get_alias_set (tree t)
+tree
+objcp_tsubst_copy_and_build (tree t ATTRIBUTE_UNUSED,
+ tree args ATTRIBUTE_UNUSED,
+ tsubst_flags_t complain ATTRIBUTE_UNUSED,
+ tree in_decl ATTRIBUTE_UNUSED,
+ bool function_p ATTRIBUTE_UNUSED)
{
-
- if (/* It's not yet safe to use alias sets for some classes in C++. */
- !ok_to_generate_alias_set_for_type (t)
- /* Nor is it safe to use alias sets for pointers-to-member
- functions, due to the fact that there may be more than one
- RECORD_TYPE type corresponding to the same pointer-to-member
- type. */
- || TYPE_PTRMEMFUNC_P (t))
- return 0;
-
- return c_common_get_alias_set (t);
+ return NULL_TREE;
}
-/* Called from check_global_declarations. */
-static bool
-cxx_warn_unused_global_decl (tree decl)
+static void
+cp_init_ts (void)
{
- if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
- return false;
- if (DECL_IN_SYSTEM_HEADER (decl))
- return false;
-
- /* Const variables take the place of #defines in C++. */
- if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
- return false;
+ tree_contains_struct[NAMESPACE_DECL][TS_DECL_NON_COMMON] = 1;
+ tree_contains_struct[USING_DECL][TS_DECL_NON_COMMON] = 1;
+ tree_contains_struct[TEMPLATE_DECL][TS_DECL_NON_COMMON] = 1;
- return true;
-}
+ tree_contains_struct[NAMESPACE_DECL][TS_DECL_WITH_VIS] = 1;
+ tree_contains_struct[USING_DECL][TS_DECL_WITH_VIS] = 1;
+ tree_contains_struct[TEMPLATE_DECL][TS_DECL_WITH_VIS] = 1;
-/* Langhook for expr_size: Tell the backend that the value of an expression
- of non-POD class type does not include any tail padding; a derived class
- might have allocated something there. */
-
-static tree
-cp_expr_size (tree exp)
-{
- if (CLASS_TYPE_P (TREE_TYPE (exp)))
- {
- /* The backend should not be interested in the size of an expression
- of a type with both of these set; all copies of such types must go
- through a constructor or assignment op. */
- if (TYPE_HAS_COMPLEX_INIT_REF (TREE_TYPE (exp))
- && TYPE_HAS_COMPLEX_ASSIGN_REF (TREE_TYPE (exp))
- /* But storing a CONSTRUCTOR isn't a copy. */
- && TREE_CODE (exp) != CONSTRUCTOR)
- abort ();
- /* This would be wrong for a type with virtual bases, but they are
- caught by the abort above. */
- return CLASSTYPE_SIZE_UNIT (TREE_TYPE (exp));
- }
- else
- /* Use the default code. */
- return lhd_expr_size (exp);
-}
+ tree_contains_struct[NAMESPACE_DECL][TS_DECL_WRTL] = 1;
+ tree_contains_struct[USING_DECL][TS_DECL_WRTL] = 1;
+ tree_contains_struct[TEMPLATE_DECL][TS_DECL_WRTL] = 1;
-/* Langhook for tree_size: determine size of our 'x' and 'c' nodes. */
-static size_t
-cp_tree_size (enum tree_code code)
-{
- switch (code)
- {
- case PTRMEM_CST: return sizeof (struct ptrmem_cst);
- case BASELINK: return sizeof (struct tree_baselink);
- case TEMPLATE_PARM_INDEX: return sizeof (template_parm_index);
- case DEFAULT_ARG: return sizeof (struct tree_default_arg);
- case OVERLOAD: return sizeof (struct tree_overload);
- case WRAPPER: return sizeof (struct tree_wrapper);
- default:
- abort ();
- }
- /* NOTREACHED */
-}
+ tree_contains_struct[NAMESPACE_DECL][TS_DECL_COMMON] = 1;
+ tree_contains_struct[USING_DECL][TS_DECL_COMMON] = 1;
+ tree_contains_struct[TEMPLATE_DECL][TS_DECL_COMMON] = 1;
-/* Returns true if T is a variably modified type, in the sense of C99.
- This routine needs only check cases that cannot be handled by the
- language-independent logic in tree-inline.c. */
+ tree_contains_struct[NAMESPACE_DECL][TS_DECL_MINIMAL] = 1;
+ tree_contains_struct[USING_DECL][TS_DECL_MINIMAL] = 1;
+ tree_contains_struct[TEMPLATE_DECL][TS_DECL_MINIMAL] = 1;
-static bool
-cp_var_mod_type_p (tree type)
-{
- /* If TYPE is a pointer-to-member, it is variably modified if either
- the class or the member are variably modified. */
- if (TYPE_PTRMEM_P (type) || TYPE_PTRMEMFUNC_P (type))
- return (variably_modified_type_p (TYPE_PTRMEM_CLASS_TYPE (type))
- || variably_modified_type_p (TYPE_PTRMEM_POINTED_TO_TYPE (type)));
+ init_shadowed_var_for_decl ();
- /* All other types are not variably modified. */
- return false;
}
-/* Stub routine to tell people that this doesn't work yet. */
void
-c_reset_state (void)
+finish_file (void)
{
- sorry ("inter-module optimisations not implemented yet");
+ cp_finish_file ();
}
+
+#include "gtype-cp.h"
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