94   void combine(MachineInstr &I1, MachineInstr &I2,
98   bool isSafeToMoveTogether(MachineInstr &I1, MachineInstr &I2,
259                                                 MachineInstr &I2,  in isSafeToMoveTogether()  argument
263   Register I2UseReg = UseReg(I2.getOperand(1));  in isSafeToMoveTogether()
277     MachineBasicBlock::reverse_iterator I = ++I2.getIterator().getReverse();  in isSafeToMoveTogether()
286     if (I2.killsRegister(I2UseReg))  in isSafeToMoveTogether()
316         removeKillInfo(I2, KilledOperand);  in isSafeToMoveTogether()
326     MachineBasicBlock::iterator I(I1), End(I2);  in isSafeToMoveTogether()
329       End = std::next(MachineBasicBlock::iterator(I2));  in isSafeToMoveTogether()
504       MachineInstr *I2 = findPairable(I1, DoInsertAtI1, OptForSize);  in runOnMachineFunction()  local
505       if (I2) {  in runOnMachineFunction()
507         combine(I1, *I2, MI, DoInsertAtI1, OptForSize);  in runOnMachineFunction()
522   MachineBasicBlock::iterator I2 = std::next(MachineBasicBlock::iterator(I1));  in findPairable()  local
523   while (I2 != I1.getParent()->end() && I2->isDebugInstr())  in findPairable()
524     ++I2;  in findPairable()
528   for (MachineBasicBlock::iterator End = I1.getParent()->end(); I2 != End;  in findPairable()
529        ++I2) {  in findPairable()
531     if (I2->modifiesRegister(I1DestReg, TRI))  in findPairable()
535     if (!isCombinableInstType(*I2, TII, ShouldCombineAggressively))  in findPairable()
539     if (ShouldCombineAggressively && PotentiallyNewifiableTFR.count(&*I2))  in findPairable()
542     Register I2DestReg = I2->getOperand(0).getReg();  in findPairable()
555     if ((IsI2LowReg && !areCombinableOperations(TRI, I1, *I2, AllowC64)) ||  in findPairable()
556         (IsI1LowReg && !areCombinableOperations(TRI, *I2, I1, AllowC64)))  in findPairable()
559     if (isSafeToMoveTogether(I1, *I2, I1DestReg, I2DestReg, DoInsertAtI1))  in findPairable()
560       return &*I2;  in findPairable()
568 void HexagonCopyToCombine::combine(MachineInstr &I1, MachineInstr &I2,  in combine()  argument
573   if (MI == I2.getIterator())  in combine()
578   Register I2DestReg = I2.getOperand(0).getReg();  in combine()
599   MachineOperand &LoOperand = IsI1Loreg ? I1.getOperand(1) : I2.getOperand(1);  in combine()
600   MachineOperand &HiOperand = IsI1Loreg ? I2.getOperand(1) : I1.getOperand(1);  in combine()
608                isGreaterThanNBitTFRI<16>(I1) && isGreaterThanNBitTFRI<16>(I2);  in combine()
610   MachineBasicBlock::iterator InsertPt(DoInsertAtI1 ? I1 : I2);  in combine()
638   I2.eraseFromParent();  in combine()