message: Update split pass to not move control operators
diff: @@ -11,7 +11,10 @@ static constexpr const char* impure_operators[] = {
  "RandomNormal",
  "RandomNormalLike",
  "RandomUniform",
  - "RandomUniformLike"
  + "RandomUniformLike",
  + "Loop",
  + "If",
  + "Scan",
  };
  static bool is_pure_operator(Node * n) {
  