* tree-ssa-loop-ivopts.c (aff_combination_convert,

	determine_common_wider_type): New functions.
	(get_computation_aff): Use them to simplify arithmetic between
	UBASE and CBASE if they are shortened from the same type.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@117182 138bc75d-0d04-0410-961f-82ee72b054a4