i32_max_ = QuantizedType::getDefaultMaximumForInteger(kSigned, k32Bits);
  any_ = AnyQuantizedType();
  qi8_ = AnyQuantizedType::get(kSigned, i8_, f32_, i8_min_, i8_max_);
  qi8n_ = AnyQuantizedType::get(kSigned, i8_, f32_, i8_min_ + 1, i8_max_);
  qi32_ = AnyQuantizedType::get(kSigned, i32_, f32_, i32_min_, i32_max_);
  assert(qi8n_ == qi8n_);
}

std::optional<KernelSpec> DeviceTarget::GetKernelSpec(

      QuantizedMultipliers* output_multipliers, QuantizedRanges* output_ranges);

  // A set of parameters are required to build the signatures.
  FloatType f32_;
  IntegerType i8_, i32_;
  int64_t i8_min_, i8_max_, i32_min_, i32_max_;
  quant::AnyQuantizedType any_, qi8_, qi8n_, qi32_;

 private:
  // Maps the kernel names to all the available kernels.
  llvm::StringMap<KernelSpecs> specs_;