142   MachineRegisterInfo::use_nodbg_iterator UI = MRI->use_nodbg_begin(SrcReg);  in OptimizeExtInstr()  local
143   if (++UI == MRI->use_nodbg_end())  in OptimizeExtInstr()
150   UI = MRI->use_nodbg_begin(DstReg);  in OptimizeExtInstr()
152        UI != UE; ++UI)  in OptimizeExtInstr()
153     ReachedBBs.insert(UI->getParent());  in OptimizeExtInstr()
162   UI = MRI->use_nodbg_begin(SrcReg);  in OptimizeExtInstr()
164        UI != UE; ++UI) {  in OptimizeExtInstr()
165     MachineOperand &UseMO = UI.getOperand();  in OptimizeExtInstr()
166     MachineInstr *UseMI = &*UI;  in OptimizeExtInstr()
229     UI = MRI->use_nodbg_begin(DstReg);  in OptimizeExtInstr()
231            UE = MRI->use_nodbg_end(); UI != UE; ++UI)  in OptimizeExtInstr()
232       if (UI->isPHI())  in OptimizeExtInstr()
233         PHIBBs.insert(UI->getParent());  in OptimizeExtInstr()