* config/rs6000/rs6000.c (rs6000_mixed_function_arg): Update

	magic NULL_RTX comment.
	(function_arg): Store entire fp arg to mem if any part should go
	on stack.
	(rs6000_arg_partial_bytes): Adjust for above change.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@112880 138bc75d-0d04-0410-961f-82ee72b054a4