Function x86_64_sysv64_va_arg_from_memory

fn x86_64_sysv64_va_arg_from_memory<'ll, 'tcx>(
    bx: &mut GenericBuilder<'_, 'll, FullCx<'ll, 'tcx>>,
    va_list_addr: &'ll Value,
    layout: TyAndLayout<'tcx, Ty<'tcx>>,
) -> &'ll Value