if (failed(pm.run(*module))) {
    return absl::InternalError("conversion error");
  }
  return absl::OkStatus();
}

std::vector<std::unique_ptr<tac::TargetHardware>>
TacModule::InstantiateBackends() {
  std::vector<std::unique_ptr<tac::TargetHardware>> backends;
  for (const auto& hardware_name : options_.hardware_backends) {
    auto factory = tac::GetTargetHardwareFactory(hardware_name);

  absl::Status RunTacPasses(mlir::ModuleOp* module, bool debug_mode = false);

  // Create instances of all registered hardwares.
  std::vector<std::unique_ptr<tac::TargetHardware>> InstantiateBackends();

  std::unique_ptr<TacImporter> importer_;
  std::unique_ptr<TacExporter> exporter_;
  // Owned list of all target hardware backends.
  std::vector<std::unique_ptr<tac::TargetHardware>> backends_;