//    in `PreprocessEdgesBetweenOutsideCompilations` step 2).
// 2a. Reconnect control edges between different outside compilations (marked by
//     `PreprocessEdgesBetweenOutsideCompilations` step 1a).
// Notice that control edges marked by
// `PreprocessEdgesBetweenOutsideCompilations` step 1b are not handled here.
// They are handled in `RewriteOutsideCompilationSubgraphFn`.
Status PostprocessEdgesBetweenOutsideCompilations(

template <typename T>
void ReplaceAttr(Node* n, const string& attr_name, const T& value) {
  n->ClearAttr(attr_name);
  n->AddAttr(attr_name, value);
}

// Step 1 for `PreprocessEdgesBetweenOutsideCompilations`. See comments of
// `PreprocessEdgesBetweenOutsideCompilations` for details.
Status PreprocessControlEdgesBetweenOutsideCompilations(
    Graph* g, const string& outside_compilation_attr_name) {

    // Preprocess edges between different outside compilations. They will be
    // restored in `ConstructHostGraph()`.
    TF_RETURN_IF_ERROR(PreprocessEdgesBetweenOutsideCompilations(
        fbody->graph, outside_compilation_attr_name));

    // Encapsulate outside_compilation cluster into function call node.