https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112783
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- 0x000000000040d178 <+152>: call 0x401280 <__ctype_b_loc@plt> => 0x000000000040d17d <+157>: movsbq (%r15),%rcx r15 0x0 0 Seeing if I can reduce it ...