noinline.mutable_signature()->set_name("NoInlineFn");
  AddAttr("_noinline", static_cast<bool>(true), noinline.mutable_attr());

  FunctionDefLibrary flib;
  *flib.add_function() = compilable;
  *flib.add_function() = uncompilable;
  *flib.add_function() = noinline;
  FunctionLibraryDefinition flib_def(OpRegistry::Global(), flib);

  std::unique_ptr<Graph> graph(new Graph(&flib_def));
  {

      "    }",
      &def));
  return def.SerializeAsString();
}

// a + a
string AddFunction() {
  tensorflow::FunctionDef def;
  CHECK(tensorflow::protobuf::TextFormat::ParseFromString(
      "    signature {"
      "      name: 'AddFunction'"
      "      input_arg {"
      "        name: 'a'"
      "        type: DT_FLOAT"
      "      }"