message: Handle PassMode::Cast in combination with #[repr(align)]
diff: @@ -227,17 +227,19 @@ pub(super) fn from_casted_value<'tcx>(
  cast: CastTarget,
  ) -> CValue<'tcx> {
  let abi_params = cast_target_to_abi_params(cast);
  - let size: u32 = abi_params
  + let abi_param_size: u32 = abi_params
  .iter()
  .map(|param| param.value_type.bytes())
  .sum();
  - // Stack slot size may be bigger for for example `[u8; 3]` which is packed into an `i32`.
  - assert!(u64::from(size) >= layout.size.bytes());
  + let layout_size = u32::try_from(layout.size.bytes()).unwrap();
  let stack_slot = fx.bcx.create_stack_slot(StackSlotData {
  kind: StackSlotKind::ExplicitSlot,
  // FIXME Don't force the size to a multiple of 16 bytes once Cranelift gets a way to
  // specify stack slot alignment.
  - size: (size + 15) / 16 * 16,
  + // Stack slot size may be bigger for for example `[u8; 3]` which is packed into an `i32`.
  + // It may also be smaller for example when the type is a wrapper around an integer with a
  + // larger alignment than the integer.
  + size: (std::cmp::max(abi_param_size, layout_size) + 15) / 16 * 16,
  offset: None,
  });
  let ptr = Pointer::new(fx.bcx.ins().stack_addr(pointer_ty(fx.tcx), stack_slot, 0));
  