// If the input `tensor` has scale/zero_point, `res` should have quantized
// type, thus none stats op is required and nullptr is returned.
// If the min max information is invalid, nullptr is returned.
mlir::Operation* ConvertMinMaxToStatsOp(const TensorT& tensor, OpBuilder b,
                                        Value res) {
  // If the `tensor` has scale/zero_point, it must have been quantized, then the