261                      RegDefsUses &RegDU, InspectMemInstr &IM, Iter Slot,
266     bool searchBackward(MachineBasicBlock &MBB, MachineInstr &Slot) const;
270     bool searchForward(MachineBasicBlock &MBB, Iter Slot) const;
275     bool searchSuccBBs(MachineBasicBlock &MBB, Iter Slot) const;
693                                       InspectMemInstr &IM, Iter Slot,  in searchRange()  argument
746     unsigned Opcode = (*Slot).getOpcode();  in searchRange()
774                                          MachineInstr &Slot) const {  in searchBackward()
783   RegDU.init(Slot);  in searchBackward()
785   MachineBasicBlock::iterator SlotI = Slot;  in searchBackward()
786   if (!searchRange(MBB, ++SlotI.getReverse(), MBB.rend(), RegDU, MemDU, Slot,  in searchBackward()
800                                         Iter Slot) const {  in searchForward()
802   if (DisableForwardSearch || !Slot->isCall())  in searchForward()
809   RegDU.setCallerSaved(*Slot);  in searchForward()
811   if (!searchRange(MBB, std::next(Slot), MBB.end(), RegDU, NM, Slot, Filler)) {  in searchForward()
817   MBB.splice(std::next(Slot), &MBB, Filler);  in searchForward()
818   MIBundleBuilder(MBB, Slot, std::next(Slot, 2));  in searchForward()
824                                         Iter Slot) const {  in searchSuccBBs()
858   if (!searchRange(MBB, SuccBB->begin(), SuccBB->end(), RegDU, *IM, Slot,  in searchSuccBBs()