/* Language-dependent hooks for C++.
- Copyright 2001 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2004 Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
-GNU CC is distributed in the hope that it will be useful,
+GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
+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. */
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "tree.h"
#include "cp-tree.h"
#include "c-common.h"
#include "toplev.h"
#include "langhooks.h"
#include "langhooks-def.h"
+#include "diagnostic.h"
+#include "cxx-pretty-print.h"
+#include "debug.h"
+#include "cp-objcp-common.h"
-static HOST_WIDE_INT cxx_get_alias_set PARAMS ((tree));
-static bool ok_to_generate_alias_set_for_type PARAMS ((tree));
+enum c_language_kind c_language = clk_cxx;
+
+/* Lang hooks common to C++ and ObjC++ are declared in cp/cp-objcp-common.h;
+ consequently, there should be very few hooks below. */
+
+static int cxx_types_compatible_p (tree, tree);
#undef LANG_HOOKS_NAME
#define LANG_HOOKS_NAME "GNU C++"
#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 cxx_init_options
-#undef LANG_HOOKS_DECODE_OPTION
-#define LANG_HOOKS_DECODE_OPTION cxx_decode_option
-#undef LANG_HOOKS_POST_OPTIONS
-#define LANG_HOOKS_POST_OPTIONS cxx_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_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_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_SET_YYDEBUG
-#define LANG_HOOKS_SET_YYDEBUG cxx_set_yydebug
-
-#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_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_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
-
-/* Each front end provides its own hooks, for toplev.c. */
-const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
+#undef LANG_HOOKS_TYPES_COMPATIBLE_P
+#define LANG_HOOKS_TYPES_COMPATIBLE_P cxx_types_compatible_p
+#undef LANG_HOOKS_FOLD_OBJ_TYPE_REF
+#define LANG_HOOKS_FOLD_OBJ_TYPE_REF cp_fold_obj_type_ref
-/* 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 (t)
- 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;
- /* 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;
-}
+/* Each front end provides its own lang hook initializer. */
+const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
-/* Tree code classes. */
+/* 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
-/* Special routine to get the alias set for C++. */
+/* Lang hook routines common to C++ and ObjC++ appear in cp/cp-objcp-common.c;
+ there should be very few routines below. */
-static HOST_WIDE_INT
-cxx_get_alias_set (t)
- tree t;
+/* This compares two types for equivalence ("compatible" in C-based languages).
+ This routine should only return 1 if it is sure. It should not be used
+ in contexts where erroneously returning 0 causes problems. */
+
+static int cxx_types_compatible_p (tree x, tree y)
{
- /* It's not yet safe to use alias sets for classes in C++. */
- if (!ok_to_generate_alias_set_for_type(t))
- return 0;
+ if (same_type_ignoring_top_level_qualifiers_p (x, y))
+ return 1;
+
+ /* Once we get to the middle-end, references and pointers are
+ interchangeable. FIXME should we try to replace all references with
+ pointers? */
+ if (POINTER_TYPE_P (x) && POINTER_TYPE_P (y)
+ && same_type_p (TREE_TYPE (x), TREE_TYPE (y)))
+ return 1;
- return c_common_get_alias_set (t);
+ return 0;
}
+
+/* The following function does something real, but only in Objective-C++. */
+
+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)
+{
+ return NULL_TREE;
+}
+
+void
+finish_file (void)
+{
+ cp_finish_file ();
+}
+
+#include "gtype-cp.h"
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