std::optional<StringRef> tf2xla_fallback_device_type,
                      bool prefer_tf2xla) {
    legalize_chlo_ = legalize_chlo;
    prefer_tf2xla_ = prefer_tf2xla;
    use_tf2xla_fallback_ = tf2xla_fallback_device_type.has_value();
    if (tf2xla_fallback_device_type.has_value()) {
      device_type_ = tf2xla_fallback_device_type.value().str();
    }
  }
  /// Performs the lowering to XLA dialect.

    used.
  }];
  let options = [
    Option<"legalize_chlo_", "legalize-chlo", "bool", /*default=*/"true",
        "Legalizes intermediate chlo ops to hlo">,
    Option<"use_tf2xla_fallback_", "use-tf2xla-fallback", "bool",
        /*default=*/"false",
        "Use TF2XLA fallback for legalization">,
    Option<"device_type_", "device-type", "std::string",
        /*default=*/"\"INVALID_DEVICE_TYPE\"",