https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94863
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Gabriel Ravier from comment #1) > Note: The given outputs for LLVM and GCC are when compiling with `-O3 > -msse4.1` I think you have the oppsite meaning with respect to `-msse4.1` here. They are the same at -O3 but LLVM produces blendps with `-msse4.1` .