Method CheckFaninsInternal

tensorflow/core/grappler/utils/graph_view.cc:496–532

}

Status MutableGraphView::CheckFaninsInternal(
    std::vector<std::vector<TensorId>>* fanins) {
  const int num_nodes = nodes_.size();
  fanins->reserve(num_nodes);
  for (int i = 0; i < num_nodes; ++i) {
    bool has_observed_control = false;
    const NodeDef* node = nodes_[i].node();
    const string& node_name = node->name();
    std::vector<TensorId> node_fanins;
    node_fanins.reserve(node->input_size());
    for (const string& input : node->input()) {
      TensorId fanin_id = ParseTensorName(input);
      if (fanin_id.node() == node_name) {
        return errors::InvalidArgument(kMutableGraphViewError, "node '",
                                       node_name, "' has self cycle fanin '",
                                       input, "'.");
      }
      bool is_control = IsTensorIdControl(fanin_id);
      if (!is_control && has_observed_control) {
        return errors::InvalidArgument(kMutableGraphViewError, "node '",
                                       node_name, "' has regular fanin '",
                                       input, "' after controlling fanins.");
      }
      if (!node_index_by_name_.contains(fanin_id.node())) {
        return errors::InvalidArgument(kMutableGraphViewError, "node '",
                                       node_name, "' has missing fanin '",
                                       input, "'.");
      }
      if (is_control) {
        has_observed_control = true;
      }
      node_fanins.push_back(std::move(fanin_id));
    }
    fanins->push_back(std::move(node_fanins));
  }
  return Status::OK();
}

void MutableGraphView::AddFaninsInternal(
    std::vector<std::vector<TensorId>>* fanins) {