https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27055
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Status|NEW |RESOLVED Target Milestone|--- |4.4.0 Resolution|--- |FIXED --- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Been fixed at least since 4.4.0: movl %esp, %edi rep movsl Maybe even earlier.