https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101668
--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> --- > it looks like there's no V8SI->V8DI conversion optab or we choose V4DI > for some other reason as prefered vector mode. We have, just need to add -mprefer-vector-width=512, the we'll get bar_s32_s64: vpmovsxdq zmm0, ymm0 vmovdqa64 ZMMWORD PTR [rdi], zmm0 ret