https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101464
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- But in the long discussion involving vzeroupper and HTM aborts in glibc memory functions it came up that vpxor is _not_ properly clearing the upper state and thus does _not_ remove the penalty that following non-VEX SSE instructions get?
