* config/mmix/mmix.h (FUNCTION_VALUE, FUNCTION_OUTGOING_VALUE,
	LIBCALL_VALUE, FUNCTION_VALUE_REGNO_P): Remove macros.
	* config/mmix/mmix.c (TARGET_FUNCTION_VALUE, TARGET_LIBCALL_VALUE,
	TARGET_FUNCTION_VALUE_REGNO_P): Define.
	(mmix_function_outgoing_value): Rename to...
	(mmix_function_value): ...this. Make static. Add 'outgoing' argument.
	(mmix_function_value_regno_p): Make static.
	(mmix_libcall_value): New function.
	* config/mmix/mmix-protos.h (mmix_function_outgoing_value,
	mmix_function_value_regno_p): Remove declaration.

From-SVN: r159458