/* 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"
-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;
+
+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);
+static void cxx_initialize_diagnostics (diagnostic_context *);
#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
#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
+#define LANG_HOOKS_INIT_OPTIONS c_common_init_options
+#undef LANG_HOOKS_INITIALIZE_DIAGNOSTICS
+#define LANG_HOOKS_INITIALIZE_DIAGNOSTICS cxx_initialize_diagnostics
+#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 cxx_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_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_INSERT_DEFAULT_ATTRIBUTES
-#define LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES cxx_insert_default_attributes
-#undef LANG_HOOKS_MARK_TREE
-#define LANG_HOOKS_MARK_TREE cxx_mark_tree
+#undef LANG_HOOKS_TRUTHVALUE_CONVERSION
+#define LANG_HOOKS_TRUTHVALUE_CONVERSION c_common_truthvalue_conversion
+#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_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_PRINT_ERROR_FUNCTION
+#define LANG_HOOKS_PRINT_ERROR_FUNCTION cxx_print_error_function
+#undef LANG_HOOKS_PUSHLEVEL
+#define LANG_HOOKS_PUSHLEVEL lhd_do_nothing_i
+#undef LANG_HOOKS_POPLEVEL
+#define LANG_HOOKS_POPLEVEL lhd_do_nothing_iii_return_null_tree
+#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_DECL_UNINIT
+#define LANG_HOOKS_DECL_UNINIT c_decl_uninit
+#undef LANG_HOOKS_UPDATE_DECL_AFTER_SAVING
+#define LANG_HOOKS_UPDATE_DECL_AFTER_SAVING cp_update_decl_after_saving
+
+
+#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
+
+#undef LANG_HOOKS_RTL_EXPAND_START
+#define LANG_HOOKS_RTL_EXPAND_START cxx_expand_function_start
+#undef LANG_HOOKS_RTL_EXPAND_STMT
+#define LANG_HOOKS_RTL_EXPAND_STMT expand_stmt
+
+/* 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_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_INLINING_VAR_MOD_TYPE_P
+#define LANG_HOOKS_TREE_INLINING_VAR_MOD_TYPE_P cp_var_mod_type_p
+#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_CALLGRAPH_ANALYZE_EXPR
+#define LANG_HOOKS_CALLGRAPH_ANALYZE_EXPR cxx_callgraph_analyze_expr
+#undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
+#define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION expand_body
#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
+#undef LANG_HOOKS_REGISTER_BUILTIN_TYPE
+#define LANG_HOOKS_REGISTER_BUILTIN_TYPE c_register_builtin_type
/* Each front end provides its own hooks, for toplev.c. */
const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
+/* Tree code classes. */
+
+#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
+
+const char tree_code_type[] = {
+#include "tree.def"
+ 'x',
+#include "c-common.def"
+ 'x',
+#include "cp-tree.def"
+};
+#undef DEFTREECODE
+
+/* Table indexed by tree code giving number of expression
+ operands beyond the fixed part of the node structure.
+ Not used for types or decls. */
+
+#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
+
+const unsigned char tree_code_length[] = {
+#include "tree.def"
+ 0,
+#include "c-common.def"
+ 0,
+#include "cp-tree.def"
+};
+#undef DEFTREECODE
+
+/* Names of tree components.
+ Used for printing out the tree and error messages. */
+#define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
+
+const char *const tree_code_name[] = {
+#include "tree.def"
+ "@@dummy",
+#include "c-common.def"
+ "@@dummy",
+#include "cp-tree.def"
+};
+#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 (t)
- tree t;
+ok_to_generate_alias_set_for_type (tree t)
{
if (TYPE_PTRMEMFUNC_P (t))
return true;
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;
return true;
}
-/* Tree code classes. */
+/* Special routine to get the alias set for C++. */
-#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
+static HOST_WIDE_INT
+cxx_get_alias_set (tree t)
+{
+ if (IS_FAKE_BASE_TYPE (t))
+ /* The base variant of a type must be in the same alias set as the
+ complete type. */
+ return get_alias_set (TYPE_CONTEXT (t));
+
+ 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;
-const char tree_code_type[] = {
-#include "tree.def"
- 'x',
-#include "c-common.def"
- 'x',
-#include "cp-tree.def"
-};
-#undef DEFTREECODE
+ return c_common_get_alias_set (t);
+}
-/* Table indexed by tree code giving number of expression
- operands beyond the fixed part of the node structure.
- Not used for types or decls. */
+/* Called from check_global_declarations. */
-#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
+static bool
+cxx_warn_unused_global_decl (tree decl)
+{
+ if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
+ return false;
+ if (DECL_IN_SYSTEM_HEADER (decl))
+ return false;
-const unsigned char tree_code_length[] = {
-#include "tree.def"
- 0,
-#include "c-common.def"
- 0,
-#include "cp-tree.def"
-};
-#undef DEFTREECODE
+ /* Const variables take the place of #defines in C++. */
+ if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
+ return false;
-/* Names of tree components.
- Used for printing out the tree and error messages. */
-#define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
+ return true;
+}
-const char *const tree_code_name[] = {
-#include "tree.def"
- "@@dummy",
-#include "c-common.def"
- "@@dummy",
-#include "cp-tree.def"
-};
-#undef DEFTREECODE
+/* 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. */
-/* Special routine to get the alias set for C++. */
+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 (is_empty_class (TREE_TYPE (exp))
+ ? size_zero_node
+ : CLASSTYPE_SIZE_UNIT (TREE_TYPE (exp)));
+ }
+ else
+ /* Use the default code. */
+ return lhd_expr_size (exp);
+}
-static HOST_WIDE_INT
-cxx_get_alias_set (t)
- tree t;
+/* Langhook for tree_size: determine size of our 'x' and 'c' nodes. */
+static size_t
+cp_tree_size (enum tree_code code)
{
- /* It's not yet safe to use alias sets for classes in C++. */
- if (!ok_to_generate_alias_set_for_type(t))
- return 0;
+ 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);
+ default:
+ abort ();
+ }
+ /* NOTREACHED */
+}
- return c_common_get_alias_set (t);
+/* 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_PTR_TO_MEMBER_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;
+}
+
+/* Construct a C++-aware pretty-printer for CONTEXT. It is assumed
+ that CONTEXT->printer is an already constructed basic pretty_printer. */
+static void
+cxx_initialize_diagnostics (diagnostic_context *context)
+{
+ pretty_printer *base = context->printer;
+ cxx_pretty_printer *pp = xmalloc (sizeof (cxx_pretty_printer));
+ memcpy (pp_base (pp), base, sizeof (pretty_printer));
+ pp_cxx_pretty_printer_init (pp);
+ context->printer = (pretty_printer *) pp;
+
+ /* It is safe to free this object because it was previously malloc()'d. */
+ free (base);
+}
+
+/* Stubs to keep c-opts.c happy. */
+void
+push_file_scope (void)
+{
+}
+
+void
+pop_file_scope (void)
+{
}
OSDN Git Service
