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/* Language-dependent hooks for C++.
Copyright 2001, 2002 Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>
This file is part of GNU CC.
GNU CC 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,
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
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "config.h"
#include "system.h"
#include "tree.h"
#include "cp-tree.h"
#include "c-common.h"
#include "toplev.h"
#include "langhooks.h"
#include "langhooks-def.h"
static HOST_WIDE_INT cxx_get_alias_set PARAMS ((tree));
static tree cp_expr_size PARAMS ((tree));
static bool cp_var_mod_type_p PARAMS ((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 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_SAFE_FROM_P
#define LANG_HOOKS_SAFE_FROM_P c_safe_from_p
#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_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_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_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
/* Each front end provides its own hooks, for toplev.c. */
const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
/* Special routine to get the alias set for C++. */
static HOST_WIDE_INT
cxx_get_alias_set (t)
tree t;
{
/* It's not yet safe to use alias sets for classes in C++ because
the TYPE_FIELDs list for a class doesn't mention base classes. */
if (AGGREGATE_TYPE_P (t))
return 0;
return c_common_get_alias_set (t);
}
/* 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 (exp)
tree exp;
{
if (CLASS_TYPE_P (TREE_TYPE (exp)))
{
/* This would be wrong for a type with virtual bases, but they should
not get here. */
return CLASSTYPE_SIZE_UNIT (TREE_TYPE (exp));
}
else
/* Use the default code. */
return lhd_expr_size (exp);
}
/* 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. */
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)));
/* All other types are not variably modified. */
return false;
}
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