https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77438
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Target Milestone|--- |10.0 Component|tree-optimization |target Status|NEW |RESOLVED --- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> --- The x86_64 specific case was fixed in GCC 10 so closing. We get now: mmx: .LFB129: .cfi_startproc paddb %xmm1, %xmm0 ret As expected, There has been improvements later on even.