#define REGISTER_NO_GRADIENT_OP(name) \
  REGISTER_GRADIENT_OP_UNIQ_HELPER(__COUNTER__, name, nullptr)

#define REGISTER_GRADIENT_OP_UNIQ_HELPER(ctr, name, fn) \
  REGISTER_GRADIENT_OP_UNIQ(ctr, name, fn)

#define REGISTER_GRADIENT_OP_UNIQ(ctr, name, fn) \
  static bool unused_ret_val_##ctr =             \
      ::tensorflow::ops::GradOpRegistry::Global()->Register(name, fn)

}  // namespace tensorflow