// functionalization is ran before import. Ops can be lifted out of
  // tf_executor dialect islands/graphs.
  pm.addNestedPass<FuncOp>(
      mlir::CreateExecutorDialectToFunctionalConversionPass());
  // Guarantee all functions have one use, which enables more exact shape
  // inference.
  pm.addPass(mlir::TF::CreateGuaranteeAllFuncsOneUsePass());

// Creates a pass that lifts inner ops of tf_executor.island ops in
// tf_executor.graph into the same block as the tf_executor.graph.
std::unique_ptr<OperationPass<func::FuncOp>>
CreateExecutorDialectToFunctionalConversionPass();

namespace TF {
// Creates a pass that canonicalizes legacy compilation and replication
// attributes.
std::unique_ptr<OperationPass<func::FuncOp>>