https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111743
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andi Kleen from comment #5) > config/i386/i386.h:#define SLOW_BYTE_ACCESS 0 > > You mean it doesn't define it? The default is 1. Anyways in this case I was wrong but defining it to 0 causes other issues.