tflite::BuiltinOperator builtin) {
  auto it = opcode_index_map_.insert({op_name, 0});

  // If the insert succeeded, the opcode has not been created already. Create a
  // new operator code and update its index value in the map.
  if (it.second) {
    it.first->second = opcodes_.size();
    auto custom_code = builtin == tflite::BuiltinOperator_CUSTOM

  Value tensor_i32 = builder.create<TF::CastOp>(
      loc, tensor_type.clone(builder.getIntegerType(32)), tensor);
  auto reduced =
      builder.create<TF::SumOp>(loc, tensor_i32, reduction_indices_value,
                                /*keep_dims=*/builder.getBoolAttr(true));
  auto mul_op = builder.create<TF::MulOp>(loc, zp, reduced);

  // Add i32 -> i8 requantization.
  UniformQuantizeOp uniform_quant_op = rewriter.create<UniformQuantizeOp>(
      op.getLoc(), func_result_type, op.getResults());
  cast<func::ReturnOp>(entry_func_op.getBody().front().getTerminator())
      .setOperand(0, uniform_quant_op);
}

template <typename GemmStyleOp>
// Creates a quantized bias pattern for static and dynamic shape case

// be created).
static void DumpModule(mlir::ModuleOp module, std::string file_prefix) {
  std::string prefix = GetDumpDirFromEnvVar();
  if (prefix.empty()) return;

  auto* env = tensorflow::Env::Default();
  auto status = env->RecursivelyCreateDir(prefix);
  if (!status.ok()) {
    LOG(WARNING) << "cannot create directory '" << prefix
                 << "': " << status.message();

  // It's here so xla::Parameters that are created form block.getArguments will
  // have the proper shapes.
  TF_RETURN_IF_ERROR(RefineShapes(arg_shapes, module_op));

  mlir::func::FuncOp main = module_op.lookupSymbol<mlir::func::FuncOp>("main");
  mlir::Block& block = main.getRegion().front();
  xla::XlaBuilder builder("main");

  // Create xla_params.
  std::vector<xla::XlaOp> xla_params;

    // be categorized as cusom ops despite each of them may require different
    // behaviors. In that case, these ops can be marked in the custom map and
    // treated separately in this pass.

    auto custom_op = llvm::dyn_cast_or_null<CustomOp>(op);
    if (!custom_op) return false;

    // Custom op which is marked in the custom op map is quantizable.

    return;
  }

  auto new_func_type =
      builder.getFunctionType(new_input_types, new_output_types);
  func.setType(new_func_type);
}
}  // namespace

// Creates an instance of the TensorFlow Lite modify io nodes pass.
std::unique_ptr<OperationPass<func::FuncOp>> CreateModifyIONodesPass(
    Type input_type, Type output_type) {

    return WalkResult::advance();
  });
  if (result.wasInterrupted()) {
    return failure();
  }

  return builder.getArrayAttr(function_list);
}

// Creates a pruned module containing the XlaCallModule's entry function and
// other functions transitively called by the entry function.
FailureOr<OwningOpRef<ModuleOp>> PruneStablehloModule(

  } else {
    builder.setInsertionPointToStart(&block);
  }
  TypeAttr type_attr = TypeAttr::get(new_type);
  auto quantize = builder.create<TFL::QuantizeOp>(value.getLoc(), new_type,
                                                  value, type_attr);
  auto dequantize = builder.create<TFL::DequantizeOp>(
      value.getLoc(), expressed_type, quantize.getOutput());
  value.replaceAllUsesWith(dequantize);

  nodes_[inst] = node;
  return absl::OkStatus();
}

bool IsEntryFunctionArg(BlockArgument arg) {
  return arg.getParentRegion()->getParentOfType<FuncOp>().getName() == "main";
}

// Creates argument nodes from Block argument. If a name is supplied, that
// name will be used instead of generating a unique name.
Status Exporter::AddArgumentNode(BlockArgument arg, unsigned index,