https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101464
H.J. Lu <hjl.tools at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Richard Biener from comment #3) > 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? From https://sourceware.org/bugzilla/show_bug.cgi?id=27457 we can't use VPXOR to replace VZEROUPPER.