Output slice =
      ops::Slice(root.WithOpName("slice"), input, begin, size_placeholder);

  Output size = ops::Const(root.WithOpName("size"), {-8, 500});
  TF_ASSERT_OK(root.graph()->UpdateEdge(/*new_src=*/size.node(),
                                        /*new_src_index=*/0,
                                        /*dst=*/slice.node(), /*dst_index=*/2));

  std::unique_ptr<Graph> result;

  ops::Merge merge(s.WithOpName("merge"), {init_value, init_value});
  Output next_iteration =
      ops::NextIteration(s.WithOpName("next_itr"), merge.output);
  return s.graph()->UpdateEdge(next_iteration.node(), 0, merge.output.node(),
                               1);
}

TEST(NodesRelatedToRefVariables, Cycles) {
  Scope root = Scope::NewRootScope().ExitOnError();

  root.graph()->AddControlEdge(predicate_as_control.node(),
                               identity_n.operation.node());

  for (int i = 0, end = int32_inputs.size(); i < end; i++) {
    TF_RETURN_IF_ERROR(root.graph()->UpdateEdge(identity_n[i].node(), i, n,
                                                int32_inputs_input_idxs[i]));
  }

  return absl::OkStatus();
}

Status ReplaceNodeWithXlaCompileAndXlaRun(