100   void combine(MachineInstr &I1, MachineInstr &I2,
104   bool isSafeToMoveTogether(MachineInstr &I1, MachineInstr &I2,
250                                                 MachineInstr &I2,  in isSafeToMoveTogether()  argument
254   unsigned I2UseReg = UseReg(I2.getOperand(1));  in isSafeToMoveTogether()
268     MachineBasicBlock::reverse_iterator I(I2),  in isSafeToMoveTogether()
277     if (I2.killsRegister(I2UseReg))  in isSafeToMoveTogether()
307         removeKillInfo(I2, KilledOperand);  in isSafeToMoveTogether()
317     MachineBasicBlock::iterator I(I1), End(I2);  in isSafeToMoveTogether()
320       End = std::next(MachineBasicBlock::iterator(I2));  in isSafeToMoveTogether()
488       MachineInstr *I2 = findPairable(I1, DoInsertAtI1, OptForSize);  in runOnMachineFunction()  local
489       if (I2) {  in runOnMachineFunction()
491         combine(I1, *I2, MI, DoInsertAtI1, OptForSize);  in runOnMachineFunction()
506   MachineBasicBlock::iterator I2 = std::next(MachineBasicBlock::iterator(I1));  in findPairable()  local
508   while (I2->isDebugValue())  in findPairable()
509     ++I2;  in findPairable()
513   for (MachineBasicBlock::iterator End = I1.getParent()->end(); I2 != End;  in findPairable()
514        ++I2) {  in findPairable()
516     if (I2->modifiesRegister(I1DestReg, TRI))  in findPairable()
520     if (!isCombinableInstType(*I2, TII, ShouldCombineAggressively))  in findPairable()
524     if (ShouldCombineAggressively && PotentiallyNewifiableTFR.count(&*I2))  in findPairable()
527     unsigned I2DestReg = I2->getOperand(0).getReg();  in findPairable()
541     if ((IsI2LowReg && !areCombinableOperations(TRI, I1, *I2, AllowC64)) ||  in findPairable()
542         (IsI1LowReg && !areCombinableOperations(TRI, *I2, I1, AllowC64)))  in findPairable()
545     if (isSafeToMoveTogether(I1, *I2, I1DestReg, I2DestReg, DoInsertAtI1))  in findPairable()
546       return &*I2;  in findPairable()
554 void HexagonCopyToCombine::combine(MachineInstr &I1, MachineInstr &I2,  in combine()  argument
559   if (MI == I2.getIterator())  in combine()
564   unsigned I2DestReg = I2.getOperand(0).getReg();  in combine()
576   MachineOperand &LoOperand = IsI1Loreg ? I1.getOperand(1) : I2.getOperand(1);  in combine()
577   MachineOperand &HiOperand = IsI1Loreg ? I2.getOperand(1) : I1.getOperand(1);  in combine()
585                isGreaterThanNBitTFRI<16>(I1) && isGreaterThanNBitTFRI<16>(I2);  in combine()
587   MachineBasicBlock::iterator InsertPt(DoInsertAtI1 ? I1 : I2);  in combine()
615   I2.eraseFromParent();  in combine()