// freezing of TF v2 GlobalTensor ops. (Ref: b/206855389)
  pm.addPass(mlir::tf_saved_model::CreateOptimizeGlobalTensorsPass());
  pm.addPass(mlir::tf_saved_model::CreateFreezeGlobalTensorsPass(
      /*allow_mutable_tensors=*/true));

  // Generic MLIR optimization passes.
  pm.addPass(mlir::createCanonicalizerPass());
  pm.addPass(mlir::TF::CreateTFShapeInferencePass());

  // freezing of TF v2 GlobalTensor ops. (Ref: b/206855389)
  pm.addPass(mlir::tf_saved_model::CreateOptimizeGlobalTensorsPass());
  pm.addPass(mlir::tf_saved_model::CreateFreezeGlobalTensorsPass(
      /*allow_mutable_tensors=*/true));

  // Generic MLIR optimization passes.
  pm.addPass(mlir::createCanonicalizerPass());
  pm.addPass(mlir::TF::CreateTFShapeInferencePass(input_arg_shapes));

    module.emitError() << "could not freeze all global tensors in the module";
    return signalPassFailure();
  }
}

}  // namespace

std::unique_ptr<OperationPass<ModuleOp>> CreateFreezeGlobalTensorsPass(
    bool allow_mutable_tensors) {
  return std::make_unique<FreezeGlobalTensorsPass>(allow_mutable_tensors);
}

}  // namespace tf_saved_model

  if (!pass_config.disable_variable_freezing) {
    // This pass 'freezes' immutable global tensors and inlines them as tf
    // constant ops.
    pass_manager->addPass(mlir::tf_saved_model::CreateFreezeGlobalTensorsPass(
        /*allow_mutable_tensors=*/pass_config.enable_tflite_variables));
  }

  if (!saved_model_dir.empty()) {
    // This pass 'freezes' tf saved model asset ops and inlines as string values