std::vector<string>{"then_branch", "else_branch"}) {
        NameAttrList branch_func;
        TF_RETURN_IF_ERROR(GetNodeAttr(n->attrs(), attr_name, &branch_func));
        (*branch_func.mutable_attr())["_device_ordinal"] = device_ordinal_value;
        n->ClearAttr(attr_name);
        n->AddAttr(attr_name, branch_func);
      }
    } else if (n->IsWhileNode()) {

    auto branch_func = symbol_table.lookupNearestSymbolFrom<func::FuncOp>(
        op, mlir::cast<SymbolRefAttr>(branch.value()));
    if (!branch_func)
      return op->emitOpError()
             << "expects " << branch_name(branch.index()) << " ("
             << branch.value() << ") to point to a defined function";

    FunctionType branch_type = branch_func.getFunctionType();