[Bug target/85080] [8 regression] gcc.dg/vect/costmodel/ppc/costmodel-pr37194.c fails starting with r248678

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85080

--- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
_Set8 wasn't supposed to be profitable before -- but this is an old test,
predating reasonable unaligned storage accesses with Power8 and later.  We
should have vectorized both loops as soon as that came along, but without
Robin's changes we missed that opportunity.  Both of them vectorizing now is
correct.

I'll see if I can alter the test to be executed only for targets with expensive
unaligned storage accesses.