Function DedupControlInputs

tensorflow/core/grappler/utils.cc:421–433

}

void DedupControlInputs(NodeDef* node) {
  std::unordered_set<string> inputs;
  int pos = 0;
  while (pos < node->input_size()) {
    const string& input = node->input(pos);
    if (!inputs.insert(NodeName(input)).second && IsControlInput(input)) {
      node->mutable_input()->SwapElements(pos, node->input_size() - 1);
      node->mutable_input()->RemoveLast();
    } else {
      ++pos;
    }
  }
}

namespace {