for (const NodeDef& ndef : func_def->node_def()) {
    VLOG(3) << ndef.DebugString();
    if (!ndef.device().empty()) {
      TF_ASSIGN_OR_RETURN(jit::DeviceId device_id,
                          device_info_cache->GetIdFor(ndef.device()));
      device_set.Insert(device_id);
    }
  }

  if (!n->assigned_device_name().empty()) {
    // TODO(sanjoy): We need this because EncapsulateSubgraphsPass drops device