Function bytewise_equal 

fn bytewise_equal<'tcx>(
    ecx: &MiriInterpCx<'tcx>,
    left: &MPlaceTy<'tcx>,
    right: &MPlaceTy<'tcx>,
) -> InterpResult<'tcx, bool>

Do a bytewise comparison of the two places. This is used to check if a synchronization primitive matches its static initializer value.