PR target/15941

	* function.c (assign_parms): If not padding upward or intentionally
	forcing upward padding, take offset_rtx into account when determining
	the alignment for stack_parm.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@83396 138bc75d-0d04-0410-961f-82ee72b054a4