521     void ConvertVPTBlocks(LowOverheadLoop &LoLoop);
523     MachineInstr *ExpandLoopStart(LowOverheadLoop &LoLoop);
525     void Expand(LowOverheadLoop &LoLoop);
527     void IterationCountDCE(LowOverheadLoop &LoLoop);
1359   LowOverheadLoop LoLoop(*ML, *MLI, *RDA, *TRI, *TII);  in ProcessLoop()  local
1363   if (LoLoop.Preheader)  in ProcessLoop()
1364     LoLoop.Start = SearchForStart(LoLoop.Preheader);  in ProcessLoop()
1376         LoLoop.Dec = &MI;  in ProcessLoop()
1378         LoLoop.End = &MI;  in ProcessLoop()
1380         LoLoop.End = LoLoop.Dec = &MI;  in ProcessLoop()
1382         LoLoop.Start = &MI;  in ProcessLoop()
1387         LoLoop.Revert = true;  in ProcessLoop()
1392         LoLoop.AnalyseMVEInst(&MI);  in ProcessLoop()
1397   LLVM_DEBUG(LoLoop.dump());  in ProcessLoop()
1398   if (!LoLoop.FoundAllComponents()) {  in ProcessLoop()
1403   assert(LoLoop.Start->getOpcode() != ARM::t2WhileLoopStart &&  in ProcessLoop()
1409   if (LoLoop.Dec != LoLoop.End) {  in ProcessLoop()
1411     RDA->getReachingLocalUses(LoLoop.Dec, MCRegister::from(ARM::LR), Uses);  in ProcessLoop()
1412     if (Uses.size() > 1 || !Uses.count(LoLoop.End)) {  in ProcessLoop()
1414       LoLoop.Revert = true;  in ProcessLoop()
1417   LoLoop.Validate(BBUtils.get());  in ProcessLoop()
1418   Expand(LoLoop);  in ProcessLoop()
1523 void ARMLowOverheadLoops::IterationCountDCE(LowOverheadLoop &LoLoop) {  in IterationCountDCE()  argument
1524   if (!LoLoop.IsTailPredicationLegal())  in IterationCountDCE()
1529   MachineInstr *Def = RDA->getMIOperand(LoLoop.Start, 1);  in IterationCountDCE()
1536   SmallPtrSet<MachineInstr*, 4> Killed  = { LoLoop.Start, LoLoop.Dec,  in IterationCountDCE()
1537                                             LoLoop.End };  in IterationCountDCE()
1538   if (!TryRemove(Def, *RDA, LoLoop.ToRemove, Killed))  in IterationCountDCE()
1542 MachineInstr* ARMLowOverheadLoops::ExpandLoopStart(LowOverheadLoop &LoLoop) {  in ExpandLoopStart()  argument
1546   IterationCountDCE(LoLoop);  in ExpandLoopStart()
1548   MachineBasicBlock::iterator InsertPt = LoLoop.StartInsertPt;  in ExpandLoopStart()
1549   MachineInstr *Start = LoLoop.Start;  in ExpandLoopStart()
1550   MachineBasicBlock *MBB = LoLoop.StartInsertBB;  in ExpandLoopStart()
1551   unsigned Opc = LoLoop.getStartOpcode();  in ExpandLoopStart()
1552   MachineOperand &Count = LoLoop.getLoopStartOperand();  in ExpandLoopStart()
1572   LoLoop.ToRemove.insert(Start);  in ExpandLoopStart()
1576 void ARMLowOverheadLoops::ConvertVPTBlocks(LowOverheadLoop &LoLoop) {  in ConvertVPTBlocks()  argument
1589   for (auto &Block : LoLoop.getVPTBlocks()) {  in ConvertVPTBlocks()
1606       LoLoop.BlockMasksToRecompute.insert(MIB.getInstr());  in ConvertVPTBlocks()
1607       LoLoop.ToRemove.insert(TheVCMP);  in ConvertVPTBlocks()
1660             LoLoop.BlockMasksToRecompute.insert(MIB.getInstr());  in ConvertVPTBlocks()
1669       LoLoop.ToRemove.insert(VPST);  in ConvertVPTBlocks()
1677         LoLoop.ToRemove.insert(VPST);  in ConvertVPTBlocks()
1679         LoLoop.BlockMasksToRecompute.insert(VPST);  in ConvertVPTBlocks()
1691           !LoLoop.ToRemove.contains(VprDef)) {  in ConvertVPTBlocks()
1704           LoLoop.ToRemove.insert(VPST);  in ConvertVPTBlocks()
1710   LoLoop.ToRemove.insert(LoLoop.VCTPs.begin(), LoLoop.VCTPs.end());  in ConvertVPTBlocks()
1713 void ARMLowOverheadLoops::Expand(LowOverheadLoop &LoLoop) {  in Expand()  argument
1716   auto ExpandLoopEnd = [this](LowOverheadLoop &LoLoop) {  in Expand()  argument
1717     MachineInstr *End = LoLoop.End;  in Expand()
1719     unsigned Opc = LoLoop.IsTailPredicationLegal() ?  in Expand()
1724     unsigned Off = LoLoop.Dec == LoLoop.End ? 1 : 0;  in Expand()
1728     LoLoop.ToRemove.insert(LoLoop.Dec);  in Expand()
1729     LoLoop.ToRemove.insert(End);  in Expand()
1775   if (LoLoop.Revert) {  in Expand()
1776     if (isWhileLoopStart(*LoLoop.Start))  in Expand()
1777       RevertWhile(LoLoop.Start);  in Expand()
1779       RevertDo(LoLoop.Start);  in Expand()
1780     if (LoLoop.Dec == LoLoop.End)  in Expand()
1781       RevertLoopEndDec(LoLoop.End);  in Expand()
1783       RevertLoopEnd(LoLoop.End, RevertLoopDec(LoLoop.Dec));  in Expand()
1785     ExpandVMOVCopies(LoLoop.VMOVCopies);  in Expand()
1786     LoLoop.Start = ExpandLoopStart(LoLoop);  in Expand()
1787     if (LoLoop.Start)  in Expand()
1788       RemoveDeadBranch(LoLoop.Start);  in Expand()
1789     LoLoop.End = ExpandLoopEnd(LoLoop);  in Expand()
1790     RemoveDeadBranch(LoLoop.End);  in Expand()
1791     if (LoLoop.IsTailPredicationLegal())  in Expand()
1792       ConvertVPTBlocks(LoLoop);  in Expand()
1793     for (auto *I : LoLoop.ToRemove) {  in Expand()
1797     for (auto *I : LoLoop.BlockMasksToRecompute) {  in Expand()
1804   PostOrderLoopTraversal DFS(LoLoop.ML, *MLI);  in Expand()