auto orig_const_output = Const(scope, val);
  if (!scope.ok()) return Output();

  typedef typename Input::Initializer::RealType<T>::type DstT;

  if (val.tensor.dtype() == DataTypeToEnum<DstT>::v()) {
    return orig_const_output;
  }
  if (val.tensor.NumElements() == 0) {
    Tensor t(DataTypeToEnum<DstT>::v(), val.tensor.shape());
    return Const(scope, Input::Initializer(t));
  }