https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80791

--- Comment #10 from amker at gcc dot gnu.org ---
(In reply to Segher Boessenkool from comment #9)
> Either r160 should be SImode, or we should copy it to a SImode pseudo
> and use that instead throughout?  Do we want to use it as DImode anywhere?

Not sure how ppc backend/expanding works.  If m is passed in different type to
int, the conversion is better to be done at assignment of i = m.  The
extendsion instruction is kind of unnecessary?  If it is, this could fix the
after-change in-efficient code generation of ivopts.  Of course, this maybe not
related to SMS so far.

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