value = read_op.getValue();
    } else {
      llvm_unreachable("unexpected operator type");
    }

    TensorType resource_subtype = mlir::cast<TensorType>(value.getType());
    ResourceType resource_type =
        ResourceType::get({resource_subtype}, op.getContext());
    UnrankedTensorType new_resource_type =
        UnrankedTensorType::get(resource_type);