https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101456
--- Comment #9 from Hongtao.liu <crazylht at gmail dot com> --- (In reply to H.J. Lu from comment #8) > It turns out that reading YMM registers with all zero bits needs VZEROUPPER > on Sandy Bride, Ivy Bridge, Haswell, Broadwell and Alder Lake to avoid > SSE <-> AVX transition penalty. We should target tune for r12-2571-g9775e465c1fbfc32656de77c618c61acf5bd905d.
