// the fetch values in the main GraphOp corresponding to the original fetch
// values from `src_func_op`. Returns an empty vector when `src_func_op` is
// empty. `main_func_op` must have a GraphOp.
SmallVector<Value> CopyOpsToMainFunction(func::FuncOp src_func_op,
                                         func::FuncOp main_func_op) {
  GraphOp src_graph_op = GetGraphOpFromFuncOp(src_func_op);
  if (!src_graph_op) {