TF_DataType dtype, const std::vector<int64_t>& dims) {
  TF_Operation* op;
  PlaceholderHelper(graph, s, name, dtype, dims, &op);
  return op;
}

void ConstHelper(TF_Tensor* t, TF_Graph* graph, TF_Status* s, const char* name,
                 TF_Operation** op) {
  TF_OperationDescription* desc = TF_NewOperation(graph, "Const", name);
  TF_SetAttrTensor(desc, "value", t, s);