* cp-tree.h (saved_scope): Make old_bindings a vector.
	(unuse_fields): Remove.
	* name-lookup.h (cxx_saved_binding): Define it.
	* class.c (pushclass): Don't use unuse_fields.
	* name-lookup.c (cxx_saved_binding_make): Remove.
	(store_binding): Add new bindings to a vector, using an
	accumulator style, rather than adding them to a list.
	(store_bindings): Adjust accordingly.
	(store_class_bindings): Likewise.
	(push_to_top_level): Likewise.
	(pop_from_top_level): Likewise.
	* optimize.c (maybe_clone_body): Must push_to_top_level and
	pop_from_top_level calls outside of loop.
	* parser.c (cp_parser_class_specifier): Move push_scope/pop_scope
	calls here from cp_parser_late_parsing_default_args.
	(cp_parser_save_default_args): Record the class type in which the
	function is declared.
	(cp_parser_late_parsing_default_args): Do not call
	push_nested_class/pop_nested_class.
	* search.c (dfs_unuse_fields): Remove.
	(unuse_fields): Remove.

	* g++.dg/parse/defarg8.C: New test.

From-SVN: r84530