https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98793
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Looks like an interaction between threading and vector lowering, with -mavx512bw it works (using SDE).
rguenth at gcc dot gnu.org via Gcc-bugs Fri, 22 Jan 2021 04:51:19 -0800
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98793
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Looks like an interaction between threading and vector lowering, with -mavx512bw it works (using SDE).