// Get desired op data format.
    StringRef target_data_format = force_data_format_;
    if (target_data_format.empty()) {
      target_data_format = layout_sensitive_interface.GetOptimalLayout(devices);
    }

    // Skip ops that already use target data format.
    auto data_format = layout_sensitive_interface.data_format();
    if (data_format == target_data_format) return;