668     for (MachineInstr *SubDef = MRI->getVRegDef(Sub->getReg());  in getRegSeqInit()  local
669          SubDef && Sub->isReg() && Sub->getReg().isVirtual() &&  in getRegSeqInit()
670          !Sub->getSubReg() && TII->isFoldableCopy(*SubDef);  in getRegSeqInit()
671          SubDef = MRI->getVRegDef(Sub->getReg())) {  in getRegSeqInit()
672       MachineOperand *Op = &SubDef->getOperand(1);  in getRegSeqInit()
1792     const MachineInstr *SubDef = MRI->getVRegDef(Op->getReg());  in tryFoldRegSequence()  local
1793     if (!SubDef || !SubDef->isCopy() || SubDef->getOperand(1).getSubReg())  in tryFoldRegSequence()
1795     if (!TRI->isAGPR(*MRI, SubDef->getOperand(1).getReg()))  in tryFoldRegSequence()
1829       MachineInstr *SubDef = MRI->getVRegDef(Def->getReg());  in tryFoldRegSequence()  local
1830       SubDef->getOperand(1).setIsKill(false);  in tryFoldRegSequence()
1831       RS.addReg(SubDef->getOperand(1).getReg(), 0, Def->getSubReg());  in tryFoldRegSequence()