96 static std::optional<DestSourcePair> isCopyInstr(const MachineInstr &MI,  in isCopyInstr()
103     return std::optional<DestSourcePair>(  in isCopyInstr()
104         DestSourcePair{MI.getOperand(0), MI.getOperand(1)});  in isCopyInstr()
142       std::optional<DestSourcePair> CopyOperands =  in invalidateRegister()
177           std::optional<DestSourcePair> CopyOperands =  in clobberRegister()
229     std::optional<DestSourcePair> CopyOperands =  in trackCopy()
287     std::optional<DestSourcePair> CopyOperands =  in findAvailBackwardCopy()
317     std::optional<DestSourcePair> CopyOperands =  in findAvailCopy()
348     std::optional<DestSourcePair> CopyOperands =  in findLastSeenDefInCopy()
494   std::optional<DestSourcePair> CopyOperands =  in isNopCopy()
533   std::optional<DestSourcePair> CopyOperands =  in eraseIfRedundant()
557   std::optional<DestSourcePair> CopyOperands =  in isBackwardPropagatableRegClassCopy()
576   std::optional<DestSourcePair> CopyOperands =  in isForwardableRegClassCopy()
705     std::optional<DestSourcePair> CopyOperands =  in forwardUses()
780     std::optional<DestSourcePair> CopyOperands =  in ForwardCopyPropagateBlock()
904         std::optional<DestSourcePair> CopyOperands =  in ForwardCopyPropagateBlock()
950       std::optional<DestSourcePair> CopyOperands =  in ForwardCopyPropagateBlock()
975 static bool isBackwardPropagatableCopy(const DestSourcePair &CopyOperands,  in isBackwardPropagatableCopy()
1016     std::optional<DestSourcePair> CopyOperands =  in propagateDefs()
1054     std::optional<DestSourcePair> CopyOperands =  in BackwardCopyPropagateBlock()
1114     std::optional<DestSourcePair> CopyOperands =  in BackwardCopyPropagateBlock()
1236         std::optional<DestSourcePair> InnerMostSpillCopy =  in EliminateSpillageCopies()
1238         std::optional<DestSourcePair> OuterMostSpillCopy =  in EliminateSpillageCopies()
1240         std::optional<DestSourcePair> InnerMostReloadCopy =  in EliminateSpillageCopies()
1242         std::optional<DestSourcePair> OuterMostReloadCopy =  in EliminateSpillageCopies()
1267     std::optional<DestSourcePair> CopyOperands =  in EliminateSpillageCopies()
1282     std::optional<DestSourcePair> SpillCopy =  in EliminateSpillageCopies()
1284     std::optional<DestSourcePair> ReloadCopy =  in EliminateSpillageCopies()
1296     std::optional<DestSourcePair> PrevCopy =  in EliminateSpillageCopies()
1298     std::optional<DestSourcePair> CurrentCopy =  in EliminateSpillageCopies()
1306     std::optional<DestSourcePair> CopyOperands =  in EliminateSpillageCopies()