inner_params.body_outputs[0] = {inner_input1_add, 0};

  // Finalize inner graph
  TF_Output inner_outputs[2] = {{nullptr, -1}};
  TF_FinishWhile(&inner_params, s_, inner_outputs);
  ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);

  TF_Operation* input1_add =
      Add(params_->body_inputs[0], inner_outputs[1], params_->body_graph, s_);
  ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);

  DCHECK(outputs != nullptr);
  DCHECK(outputs->empty());

  TF_RETURN_IF_ERROR(scope.status());
  const size_t num_loop_vars = inputs.size();

  std::vector<Output> enter_outputs(num_loop_vars);
  for (size_t i = 0; i < num_loop_vars; ++i) {
    enter_outputs[i] = internal::Enter(scope, inputs[i], frame_name);
  }
  TF_RETURN_IF_ERROR(scope.status());

  std::vector<Output> merge_outputs(num_loop_vars);