message: add cast kind of from_exposed_addr (int-to-ptr casts)
diff: @@ -608,7 +608,9 @@ fn codegen_stmt<'tcx>(
  lval.write_cvalue(fx, operand.cast_pointer_to(to_layout));
  }
  Rvalue::Cast(
  - CastKind::Misc | CastKind::PointerExposeAddress,
  + CastKind::Misc
  + | CastKind::PointerExposeAddress
  + | CastKind::PointerFromExposedAddress,
  ref operand,
  to_ty,
  ) => {
  