// First create a simple identity function.
  TF_Graph* function_graph = TF_NewGraph();
  TF_OperationDescription* arg_descr =
      TF_NewOperation(function_graph, "Placeholder", "arg");
  TF_SetAttrType(arg_descr, "dtype", TF_INT32);
  TF_Status* status = TF_NewStatus();
  TF_Operation* arg = TF_FinishOperation(arg_descr, status);
  ASSERT_TRUE(TF_GetCode(status) == TF_OK) << TF_Message(status);
  TF_OperationDescription* id_descr =

        llvm::dyn_cast<TF::ConstOp>(fold_results[0].getDefiningOp()).getValue(),
        &tensor));
    xla::Shape xla_shape;
    TF_RETURN_IF_ERROR(tensorflow::TensorShapeToXLAShape(
        tensor.dtype(), tensor.shape(), &xla_shape));
    xla::PjRtClient::HostBufferSemantics host_buffer_semantics =
        xla::PjRtClient::HostBufferSemantics::kImmutableUntilTransferCompletes;
    TF_ASSIGN_OR_RETURN(
        auto buffer,

  TF_Status* status = TF_NewStatus();
  TFE_Op* op = TFE_NewOp(ctx, "ReadVariableOp", status);
  ASSERT_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);
  TFE_OpSetAttrType(op, "dtype", TF_FLOAT);
  TFE_OpAddInput(op, var, status);
  ASSERT_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);
  int num_retvals = 1;
  TFE_Execute(op, out_value, &num_retvals, status);

ElementsAttr GetTensorValueAsElementsAttr(
    TF::VarHandleOp var_handle_op, const tensorflow::Tensor& resource_tensor,
    const tensorflow::DeviceMgr* mgr, OpBuilder builder) {
  if (resource_tensor.dtype() != tensorflow::DT_RESOURCE) {
    return GetTensorValueAsElementsAttr(resource_tensor, builder);
  }

  auto handle = resource_tensor.scalar<tensorflow::ResourceHandle>()();

    return false;
  }

  if (node.type_string() == "Const") {
    const AttrValue* attr = node.attrs().Find("dtype");
    if (!op_filter_.allow_string_consts && attr != nullptr &&
        attr->type() == DT_STRING) {
      *uncompilable_reason =
          "Const op with type DT_STRING is not supported by XLA.";
      return false;
    }
  }

    for (int i = 0; i < 2; ++i) {
      tensor_proto.add_int_val(1);
    }
    NodeDef const_def;
    TF_CHECK_OK(NodeDefBuilder("const", "Const")
                    .Attr("dtype", DT_INT32)
                    .Attr("value", tensor_proto)
                    .Finalize(&const_def));
    Status s;
    Node *const_node = g->AddNode(const_def, &s);
    TF_CHECK_OK(s);

    NodeDef fn_def;

    Location loc = graph_func.getLoc();
    FunctionType ftype = graph_func.getFunctionType();

    func::FuncOp func = rewriter.create<func::FuncOp>(
        graph_func.getLoc(),
        graph_func->getAttrOfType<StringAttr>(SymbolTable::getSymbolAttrName())
            .getValue(),
        ftype);

    func->setAttrs(graph_func->getAttrs());

    llvm::SmallVector<Type> arg_types;
    llvm::SmallVector<Type> res_types;

      assert(while_caller.body_function() == func);
      while_callers.push_back(while_caller);
    }
  }
  return while_callers;
}

bool IsResourceType(Type type) {
  return mlir::isa<TF::ResourceType>(getElementTypeOrSelf(type));
}

bool OnlyOperatesOnCompositeDevices(
    TF::TPUExecuteAndUpdateVariablesOp& op,
    const TF::SideEffectAnalysis::Info& side_effect_analysis,

LogicalResult ConstantFoldMul(mhlo::MulOp op, PatternRewriter &rewriter) {
  ShapedType type = mlir::dyn_cast<ShapedType>(op.getType());
  Type etype = type.getElementType();
  Attribute result = {};
  if (mlir::isa<FloatType>(etype)) {
    result =
        BinaryFolder<mhlo::MulOp, FloatType, APFloat, std::multiplies<APFloat>>(
            &op);
  } else if (mlir::isa<IntegerType>(etype)) {
    result =

                  attr.default_value().value_case() == AttrValue::kType) {
                type = DataType_Name(attr.default_value().type());
              } else if (attr.has_allowed_values() &&
                         attr.allowed_values().value_case() ==
                             AttrValue::kList &&
                         !attr.allowed_values().list().type().empty()) {
                type = DataType_Name(attr.allowed_values().list().type(0));