if (!dq_op || ref_qtype) continue;
    ref_qtype = dq_op.getInput().getType();
  }
  return ref_qtype;
}

class QuantizeVariablesPass
    : public QuantizeVariablesPassBase<QuantizeVariablesPass> {
 public:
  MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(QuantizeVariablesPass)
  explicit QuantizeVariablesPass() = default;

  void runOnOperation() override;

 private: