https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117800
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Yes even fx comment https://github.com/technion/libscrypt/issues/60#issuecomment-1895762926 Almost points out the aliasing issue. He said replace Blkcpy with memcpy the issue goes away. Yes because that is where the alaising issue is located .