const llvm::APFloat value = index_and_value.value();
    if (index_and_value.index() % 2 == 0) {
      mins.push_back(value.convertToFloat());
    } else {
      maxs.push_back(value.convertToFloat());
    }
  }

  return tflite::CreateQuantizationParameters(
      builder_, builder_.CreateVector<float>(mins),

  Type result_type = getType();
  // Only constant fold for tensor of f32 is implemented.
  if (!IsF32ShapedType(result_type)) return nullptr;

  auto compute = [](APFloat value) -> APFloat {
    float f = value.convertToFloat();
    float result = std::sin(f);
    return APFloat(result);
  };
  return ConstFoldUnaryOp(result_type, operands[0], compute);
}

  const llvm::fltSemantics& semantics = op.getMin().getSemantics();
  float rmin, rmax;
  if (&semantics == &APFloat::IEEEsingle()) {
    rmin = op.getMin().convertToFloat();
    rmax = op.getMax().convertToFloat();
  } else {
    rmin = op.getMin().convertToDouble();
    rmax = op.getMax().convertToDouble();
  }
  // Range boundaries must be valid.
  if (rmin >= rmax) {