re PR c++/14138 (100x -O0 C++ Compile Time Regression {3.2,3.3} -> {3.4,4.0})

re PR c++/14138 (100x -O0 C++ Compile Time Regression {3.2,3.3} -> {3.4,4.0})

	PR c++/14138
	* name-lookup.h (push_scope): Change prototype.
	* name-lookup.c (push_scope): Do not reenter the current class
	scope.
	* decl.c (grokfndecl): Check return code from push_scope before
	calling pop_scope.
	* decl2.c (check_classfn): Likewise.
	* parser.c (cp_parser_conversion_function_id): Likewise.
	(cp_parser_init_declarator): Likewise.
	(cp_parser_direct_declarator): Likewise.
	(cp_parser_class_specifier): Likewise.
	(cp_parser_class_head): Likewise.
	(cp_parser_lookup_name): Likewise.
	(cp_parser_constructor_declarator_p): Likewise.
	* pt.c (instantiate_class_template): Likewise.
	(resolve_typename_type): Likewise.

From-SVN: r78696