# First run tfcompile to generate the list of out_nodes.
        #
        # Here and below, we set CUDA_VISIBLE_DEVICES='' to prevent the code we
        # launch from using any GPUs which might be present.  This is important
        # because builds may run concurrently with tests, and tests need to be
        # able to assume that they have control of the full GPU.
        out_nodes_file = "out_nodes_" + freeze_name
        native.genrule(

    // increasing its live range.
    //
    // See b/221997940 for a real-world example of this.
    if (n->op_def().name() == "Fill" &&
        n->out_nodes().begin() != n->out_nodes().end() &&
        absl::c_all_of(n->out_nodes(), [&](Node* user) {
          return GetClusterForNode(user) != cluster;
        })) {
      declustered_nodes_.insert(n);
    }
  }

  return absl::OkStatus();
}