* cp-tree.h (TYPE_ALIAS_SET): Document language-dependent uses.
	(TYPE_BINFO): Likewise.
	(IS_AGGR_TYPE): Tweak.
	(SET_IS_AGGR_TYPE): New macro.
	(CLASS_TYPE_P): Tweak.
	(lang_type): Group mark bitfields together.  Remove linenum.
	(CLASSTYPE_SOURCE_LINE): Remove macro.
	(CLASSTYPE_MARKED_N): New macro.
	(SET_CLASSTYPE_MARKED_N): Likewise.
	(CLEAR_CLASSTYPE_MARKED_N): Likewise.
	(CLASS_TYPE_MARKED_*): Use them.
	(SET_CLASSTYPE_MARKED_*): Likewise.
	(CLEAR_CLASSTYPE_MARKED_*): Likewise.
	(TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO): Likewise.
	(TYPE_TEMPLATE_INFO): Handle TEMPLATE_TEMPLATE_PARMs as well.
	(TYPENAME_TYPE_FULLNAME): Use TYPE_BINFO rather than CLASSTYPE_SIZE.
	* class.c (class_cache_obstack): New variable.
	(class_cache_firstobj): Likewise.
	(finish_struct): Don't set CLASSTYPE_SOURCE_LINE.
	(pushclass): Free the cache, when appropriate.
	(popclass): Tidy.
	(maybe_push_cache_obstack): Use class_cache_obstack.
	* decl.c (include hash.h).
	(typename_hash): New function.
	(typename_compare): Likewise.
	(build_typename_type): Check the hash table to avoid creating
	duplicates.
	(build_ptrmemfunc_type): Use SET_IS_AGGR_TYPE.
	(grokdeclarator): Use CLASS_TYPE_P.
	(xref_basetypes): Likewise.
	(start_function): Likewise.  Don't put current_class_ref on the
	permanent obstack.
	* error.c (dump_type_real): Use	TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO
	and TYPE_TI_ARGS.
	* lex.c (note_got_semicolon): Use CLASS_TYPE_P.
	(make_lang_type): Don't create TYPE_LANG_SPECIFIC and associated
	fields for types other than class types.  Do clear TYPE_ALIAS_SET
	for types other than class types, though.
	* method.c (build_overload_identifier): Use CLASS_TYPE_P and
	TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO.
	* pt.c (process_template_parm): Don't set
	CLASSTYPE_GOT_SEMICOLON.
	(lookup_template_class) Use TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO.
	Coerce arguments on the momentary obstack.
	(for_each_template_parm): Use TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO.
	(instantiate_class_template): Calculate template arguments on the
	momentary obstack.  Tidy.
	(tsubst_template_arg_vector): Use make_temp_vec.
	(tsubst_aggr_type): Put template arguments on the momentary
	obstack.
	(tsubst_decl): Likewise.
	(tsubst): Copy the array bounds index to the permanent obstack
	before building index types.  Use new macros.
	(unify): Use new macros.
	(do_type_instantiation): Likewise.
	* search.c (lookup_fnfields_1): Use new macros.
	(dfs_pushdecls): Build envelopes on the cache obstack.
	(dfs_compress_decls): Use new macros.
	(push_class_decls): Build on the cache obstack.
	* semantics.c (finish_typeof): Don't set CLASSTYPE_GOT_SEMICOLON.
	* sign.c (build_signature_pointer_or_reference_type): Use
	SET_IS_AGGR_TYPE.
	* tree.c (make_binfo): Check CLASS_TYPE_P.
	(copy_template_template_parm): Adjust.
	(make_temp_vec): Use push_expresion_obstack.
	* typeck.c (complete_type): Use new macros.
	(comptypes): Likewise.

From-SVN: r23686