https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78379
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Jerry DeLisle from comment #3) > I did apply your second patch: > > I do not get any improvement and results are diminished from current trunk, > so I am missing something. This is same machine I used showing results in > 51119. It does have avx. You have AMD processor, can you try with -mprefer-avx128 option?