* cse.c (notreg_cost): New argument outer.

        (COST): Pass in SET to notreg_cost
        (COST_IN): New.
        (fold_rtx): Use COST_IN.  Prefer constants when costs
        are the same.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@36671 138bc75d-0d04-0410-961f-82ee72b054a4