95 static std::optional<DestSourcePair> isCopyInstr(const MachineInstr &MI,  in isCopyInstr()
102     return std::optional<DestSourcePair>(  in isCopyInstr()
103         DestSourcePair{MI.getOperand(0), MI.getOperand(1)});  in isCopyInstr()
141       std::optional<DestSourcePair> CopyOperands =  in invalidateRegister()
176           std::optional<DestSourcePair> CopyOperands =  in clobberRegister()
228     std::optional<DestSourcePair> CopyOperands =  in trackCopy()
286     std::optional<DestSourcePair> CopyOperands =  in findAvailBackwardCopy()
316     std::optional<DestSourcePair> CopyOperands =  in findAvailCopy()
347     std::optional<DestSourcePair> CopyOperands =  in findLastSeenDefInCopy()
476   std::optional<DestSourcePair> CopyOperands =  in isNopCopy()
515   std::optional<DestSourcePair> CopyOperands =  in eraseIfRedundant()
539   std::optional<DestSourcePair> CopyOperands =  in isBackwardPropagatableRegClassCopy()
558   std::optional<DestSourcePair> CopyOperands =  in isForwardableRegClassCopy()
687     std::optional<DestSourcePair> CopyOperands =  in forwardUses()
762     std::optional<DestSourcePair> CopyOperands =  in ForwardCopyPropagateBlock()
886         std::optional<DestSourcePair> CopyOperands =  in ForwardCopyPropagateBlock()
925       std::optional<DestSourcePair> CopyOperands =  in ForwardCopyPropagateBlock()
950 static bool isBackwardPropagatableCopy(const DestSourcePair &CopyOperands,  in isBackwardPropagatableCopy()
992     std::optional<DestSourcePair> CopyOperands =  in propagateDefs()
1030     std::optional<DestSourcePair> CopyOperands =  in BackwardCopyPropagateBlock()
1090     std::optional<DestSourcePair> CopyOperands =  in BackwardCopyPropagateBlock()
1212         std::optional<DestSourcePair> InnerMostSpillCopy =  in EliminateSpillageCopies()
1214         std::optional<DestSourcePair> OuterMostSpillCopy =  in EliminateSpillageCopies()
1216         std::optional<DestSourcePair> InnerMostReloadCopy =  in EliminateSpillageCopies()
1218         std::optional<DestSourcePair> OuterMostReloadCopy =  in EliminateSpillageCopies()
1243     std::optional<DestSourcePair> CopyOperands =  in EliminateSpillageCopies()
1258     std::optional<DestSourcePair> SpillCopy =  in EliminateSpillageCopies()
1260     std::optional<DestSourcePair> ReloadCopy =  in EliminateSpillageCopies()
1272     std::optional<DestSourcePair> PrevCopy =  in EliminateSpillageCopies()
1274     std::optional<DestSourcePair> CurrentCopy =  in EliminateSpillageCopies()
1282     std::optional<DestSourcePair> CopyOperands =  in EliminateSpillageCopies()