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, /*TRI=*/nullptr))  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()
505       MachineInstr *I2 = findPairable(I1, DoInsertAtI1, OptForSize);  in runOnMachineFunction()  local
506       if (I2) {  in runOnMachineFunction()
508         combine(I1, *I2, MI, DoInsertAtI1, OptForSize);  in runOnMachineFunction()
523   MachineBasicBlock::iterator I2 = std::next(MachineBasicBlock::iterator(I1));  in findPairable()  local
524   while (I2 != I1.getParent()->end() && I2->isDebugInstr())  in findPairable()
525     ++I2;  in findPairable()
529   for (MachineBasicBlock::iterator End = I1.getParent()->end(); I2 != End;  in findPairable()
530        ++I2) {  in findPairable()
532     if (I2->modifiesRegister(I1DestReg, TRI))  in findPairable()
536     if (!isCombinableInstType(*I2, TII, ShouldCombineAggressively))  in findPairable()
540     if (ShouldCombineAggressively && PotentiallyNewifiableTFR.count(&*I2))  in findPairable()
543     Register I2DestReg = I2->getOperand(0).getReg();  in findPairable()
556     if ((IsI2LowReg && !areCombinableOperations(TRI, I1, *I2, AllowC64)) ||  in findPairable()
557         (IsI1LowReg && !areCombinableOperations(TRI, *I2, I1, AllowC64)))  in findPairable()
560     if (isSafeToMoveTogether(I1, *I2, I1DestReg, I2DestReg, DoInsertAtI1))  in findPairable()
561       return &*I2;  in findPairable()
569 void HexagonCopyToCombine::combine(MachineInstr &I1, MachineInstr &I2,  in combine()  argument
574   if (MI == I2.getIterator())  in combine()
579   Register I2DestReg = I2.getOperand(0).getReg();  in combine()
600   MachineOperand &LoOperand = IsI1Loreg ? I1.getOperand(1) : I2.getOperand(1);  in combine()
601   MachineOperand &HiOperand = IsI1Loreg ? I2.getOperand(1) : I1.getOperand(1);  in combine()
609                isGreaterThanNBitTFRI<16>(I1) && isGreaterThanNBitTFRI<16>(I2);  in combine()
611   MachineBasicBlock::iterator InsertPt(DoInsertAtI1 ? I1 : I2);  in combine()
639   I2.eraseFromParent();  in combine()