SmallVector<Value, 4> dequantized_inputs;
    for (auto& input : op->getOpOperands()) {
      auto input_type = input.get().getType();
      if (IsQI8Type(input_type) || IsQUI8Type(input_type) ||
          IsQI32Type(input_type)) {
        auto dequantized_input_type =
            mlir::quant::QuantizedType::castToExpressedType(input_type);
        builder->setInsertionPoint(op);

  return quantized_type != nullptr &&
         quantized_type.getStorageTypeIntegralWidth() == 8 &&
         !quantized_type.isSigned();
}

// Return true when the given element_type is QI32.
inline bool IsQI32Type(Type t) {
  auto quantized_type = quant::QuantizedType::getQuantizedElementType(t);
  return quantized_type != nullptr &&
         quantized_type.getStorageTypeIntegralWidth() == 32 &&
         quantized_type.isSigned();
}