14 /// Regions are first recorded in GCNScheduleDAGMILive::schedule. The actual
15 /// entry point for the scheduling of those regions is
20 /// few scheduling regions will have register pressure high enough to limit
22 /// other regions.
604   // Collect all scheduling regions. The actual scheduling is performed in  in schedule()
606   Regions.push_back(std::pair(RegionBegin, RegionEnd));  in schedule()
638   // Scheduler sends regions from the end of the block upwards.  in computeBlockPressure()
640   for (size_t E = Regions.size(); CurRegion != E; ++CurRegion)  in computeBlockPressure()
641     if (Regions[CurRegion].first->getParent() != MBB)  in computeBlockPressure()
647   auto &Rgn = Regions[CurRegion];  in computeBlockPressure()
665     if (Regions[CurRegion].first == I || NonDbgMI == I) {  in computeBlockPressure()
670     if (Regions[CurRegion].second == I) {  in computeBlockPressure()
691   assert(!Regions.empty());  in getBBLiveInMap()
693   BBStarters.reserve(Regions.size());  in getBBLiveInMap()
694   auto I = Regions.rbegin(), E = Regions.rend();  in getBBLiveInMap()
708   // MachineScheduler after all regions have been recorded by  in finalizeSchedule()
710   LiveIns.resize(Regions.size());  in finalizeSchedule()
711   Pressure.resize(Regions.size());  in finalizeSchedule()
712   RescheduleRegions.resize(Regions.size());  in finalizeSchedule()
713   RegionsWithHighRP.resize(Regions.size());  in finalizeSchedule()
714   RegionsWithExcessRP.resize(Regions.size());  in finalizeSchedule()
715   RegionsWithMinOcc.resize(Regions.size());  in finalizeSchedule()
716   RegionsWithIGLPInstrs.resize(Regions.size());  in finalizeSchedule()
727   LLVM_DEBUG(dbgs() << "All regions recorded, starting actual scheduling.\n");  in runSchedStages()
729   if (!Regions.empty())  in runSchedStages()
738     for (auto Region : Regions) {  in runSchedStages()
830   // Don't bother trying to improve ILP in lower RP regions if occupancy has not  in initGCNSchedStage()
831   // been dropped. All regions will have already been scheduled with the ideal  in initGCNSchedStage()
846   if (DAG.RegionsWithMinOcc.none() || DAG.Regions.size() == 1)  in initGCNSchedStage()
855   // FIXME: This pass will invalidate cached MBBLiveIns for regions  in initGCNSchedStage()
857   // for regions where a def is sinked from will also be invalidated. Will  in initGCNSchedStage()
900   // Skip empty scheduling regions (0 or 1 schedulable instructions).  in initGCNRegion()
955   // Only reschedule regions with the minimum occupancy or regions that may have  in initGCNRegion()
998   DAG.Regions[RegionIdx] = std::pair(DAG.RegionBegin, DAG.RegionEnd);  in finalizeGCNRegion()
1368   DAG.Regions[RegionIdx] = std::pair(DAG.RegionBegin, DAG.RegionEnd);  in revertScheduling()
1393     // live-through or used inside regions at MinOccupancy. This means that the  in collectRematerializableInstructions()
1396     for (unsigned I = 0, E = DAG.Regions.size(); I != E; ++I) {  in collectRematerializableInstructions()
1404         // Collect regions with rematerializable reg as live-in to avoid  in collectRematerializableInstructions()
1426   NewRegions.resize(DAG.Regions.size());  in sinkTriviallyRematInsts()
1427   NewRescheduleRegions.resize(DAG.Regions.size());  in sinkTriviallyRematInsts()
1429   // Collect only regions that has a rematerializable def as a live-in.  in sinkTriviallyRematInsts()
1440   NewRegions = DAG.Regions;  in sinkTriviallyRematInsts()
1512       // Update RP for all regions that has this reg as a live-in and remove  in sinkTriviallyRematInsts()
1513       // the reg from all regions as a live-in.  in sinkTriviallyRematInsts()
1516         if (InsertPos->getParent() != DAG.Regions[Idx].first->getParent()) {  in sinkTriviallyRematInsts()
1536     // Remove defs we just sinked from all regions' list of sinkable defs  in sinkTriviallyRematInsts()
1549     // Occupancy was not improved for all regions that were at MinOccupancy.  in sinkTriviallyRematInsts()
1564   // Occupancy was improved for all regions.  in sinkTriviallyRematInsts()
1580   // Update live-ins, register pressure, and regions caches.  in sinkTriviallyRematInsts()
1584     DAG.MBBLiveIns.erase(DAG.Regions[Idx].first->getParent());  in sinkTriviallyRematInsts()
1586   DAG.Regions = NewRegions;  in sinkTriviallyRematInsts()