https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95836
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- With & it would actually invoke UB for c >= 64U. So it has to be either &&, or << (c & 63), at least until we know exactly what the behavior on out of bounds shift will be.