508   MachineBasicBlock::iterator RegionBegin;  member
514     RegionBegin(B), RegionEnd(E), NumRegionInstrs(N) {}  in SchedRegion()
599       MachineBasicBlock::iterator I = R.RegionBegin;  in scheduleRegions()
769   if (&*RegionBegin == MI)  in moveInstruction()
770     ++RegionBegin;  in moveInstruction()
780   if (RegionBegin == InsertPos)  in moveInstruction()
781     RegionBegin = MI;  in moveInstruction()
923   CurrentTop = nextIfDebug(RegionBegin, RegionEnd);  in initQueues()
942     BB->splice(RegionBegin, BB, FirstDbgValue);  in placeDebugValues()
943     RegionBegin = FirstDbgValue;  in placeDebugValues()
951     if (&*RegionBegin == DbgValue)  in placeDebugValues()
952       ++RegionBegin;  in placeDebugValues()
1225   TopRPTracker.init(&MF, RegClassInfo, LIS, BB, RegionBegin,  in initRegPressure()
1270            BotRPTracker.getPos() == priorNonDebug(RegionEnd, RegionBegin))) &&  in initRegPressure()
1607     assert(TopRPTracker.getPos() == RegionBegin && "bad initial Top tracker");  in initQueues()