293   enum class LocationQuality : unsigned char {  enum in TransferTracker
307     LocationAndQuality(LocIdx L, LocationQuality Q)  in LocationAndQuality()
314     LocationQuality getQuality() const { return LocationQuality(Quality); }  in getQuality()
316     bool isBest() const { return getQuality() == LocationQuality::Best; }  in isBest()
321   std::optional<LocationQuality>
322   getLocQualityIfBetter(LocIdx L, LocationQuality Min) const {  in getLocQualityIfBetter()
325     if (Min >= LocationQuality::SpillSlot)  in getLocQualityIfBetter()
328       return LocationQuality::SpillSlot;  in getLocQualityIfBetter()
329     if (Min >= LocationQuality::CalleeSavedRegister)  in getLocQualityIfBetter()
332       return LocationQuality::CalleeSavedRegister;  in getLocQualityIfBetter()
333     if (Min >= LocationQuality::Register)  in getLocQualityIfBetter()
335     return LocationQuality::Register;  in getLocQualityIfBetter()
474       std::optional<LocationQuality> ReplacementQuality =  in loadInlocs()
542       std::optional<LocationQuality> ReplacementQuality =  in checkInstForNewValues()
1661     std::optional<TransferTracker::LocationQuality> ReplacementQuality =  in transferDebugInstrRef()