[Bug tree-optimization/88497] Improve Accumulation in Auto-Vectorized Code

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88497

--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It still does some weird register moves (the xxlor and the fmr), but
those are totally different problems ;-)