* langhooks-def.h (lhd_register_builtin_type): New function.
	(LANG_HOOKS_REGISTER_BUILTIN_TYPE): New macro.
	(LANG_HOOKS_FOR_TYPES_INITIALIZER): Update.
	* langhooks.h (lang_hooks_for_types): Add register_builtin_type.
	* langhooks.c (lhd_register_builtin_type): New function.
	* c-common.h (c_register_builtin_type): Declare.
	* c-common.c (c_register_builtin_type): New function.
	* c-lang.c (LANG_HOOKS_REGISTER_BUILTIN_TYPE): Define to
	c_register_builtin_type.
	* config/ia64/hpux.h (TARGET_OS_CPP_BUILTINS): Remove __fpreg,
	__float80, and __float128 macros.
	* config/ia64/ia64.c (ia64_init_builtins): Create __fpreg,
	__float80, and __float128 types.

	* cp-lang.c (LANG_HOOKS_REGISTER_BUILTIN_TYPE): Define to
	c_register_builtin_type.

	* gcc.dg/ia64-types1.c: New test.
	* gcc.dg/ia64-types2.c: Likewise.

From-SVN: r71227