//
// WARNING: This function does not yet support all the gradients that python
// supports. See
// https://www.tensorflow.org/code/tensorflow/cc/gradients/README.md
// for instructions on how to add C++ more gradients.
TF_CAPI_EXPORT void TF_AddGradients(TF_Graph* g, TF_Output* y, int ny,
                                    TF_Output* x, int nx, TF_Output* dx,

    auto it = tensor_tape.find(pair.first);
    if (it != tensor_tape.end() && it->second != -1) {
      result.op_missing_tensor[it->second] += 1;
    }
  }
  if (!persistent_tape) {
    // Call destructors for all unneeded gradient functions and
    // clear the op_tape. We can clear the tape because ownership of
    // backward functions that will be used for gradient computation
    // has been transferred to `result`.