515     void ConvertVPTBlocks(LowOverheadLoop &LoLoop);
517     MachineInstr *ExpandLoopStart(LowOverheadLoop &LoLoop);
519     void Expand(LowOverheadLoop &LoLoop);
521     void IterationCountDCE(LowOverheadLoop &LoLoop);
1301   LowOverheadLoop LoLoop(*ML, *MLI, *RDA, *TRI, *TII);  in ProcessLoop()  local
1305   if (LoLoop.Preheader)  in ProcessLoop()
1306     LoLoop.Start = SearchForStart(LoLoop.Preheader);  in ProcessLoop()
1318         LoLoop.Dec = &MI;  in ProcessLoop()
1320         LoLoop.End = &MI;  in ProcessLoop()
1322         LoLoop.End = LoLoop.Dec = &MI;  in ProcessLoop()
1324         LoLoop.Start = &MI;  in ProcessLoop()
1329         LoLoop.Revert = true;  in ProcessLoop()
1334         LoLoop.AnalyseMVEInst(&MI);  in ProcessLoop()
1339   LLVM_DEBUG(LoLoop.dump());  in ProcessLoop()
1340   if (!LoLoop.FoundAllComponents()) {  in ProcessLoop()
1345   assert(LoLoop.Start->getOpcode() != ARM::t2WhileLoopStart &&  in ProcessLoop()
1351   if (LoLoop.Dec != LoLoop.End) {  in ProcessLoop()
1353     RDA->getReachingLocalUses(LoLoop.Dec, MCRegister::from(ARM::LR), Uses);  in ProcessLoop()
1354     if (Uses.size() > 1 || !Uses.count(LoLoop.End)) {  in ProcessLoop()
1356       LoLoop.Revert = true;  in ProcessLoop()
1359   LoLoop.Validate(BBUtils.get());  in ProcessLoop()
1360   Expand(LoLoop);  in ProcessLoop()
1465 void ARMLowOverheadLoops::IterationCountDCE(LowOverheadLoop &LoLoop) {  in IterationCountDCE()  argument
1466   if (!LoLoop.IsTailPredicationLegal())  in IterationCountDCE()
1471   MachineInstr *Def = RDA->getMIOperand(LoLoop.Start, 1);  in IterationCountDCE()
1478   SmallPtrSet<MachineInstr*, 4> Killed  = { LoLoop.Start, LoLoop.Dec,  in IterationCountDCE()
1479                                             LoLoop.End };  in IterationCountDCE()
1480   if (!TryRemove(Def, *RDA, LoLoop.ToRemove, Killed))  in IterationCountDCE()
1484 MachineInstr* ARMLowOverheadLoops::ExpandLoopStart(LowOverheadLoop &LoLoop) {  in ExpandLoopStart()  argument
1488   IterationCountDCE(LoLoop);  in ExpandLoopStart()
1490   MachineBasicBlock::iterator InsertPt = LoLoop.StartInsertPt;  in ExpandLoopStart()
1491   MachineInstr *Start = LoLoop.Start;  in ExpandLoopStart()
1492   MachineBasicBlock *MBB = LoLoop.StartInsertBB;  in ExpandLoopStart()
1493   unsigned Opc = LoLoop.getStartOpcode();  in ExpandLoopStart()
1494   MachineOperand &Count = LoLoop.getLoopStartOperand();  in ExpandLoopStart()
1514   LoLoop.ToRemove.insert(Start);  in ExpandLoopStart()
1518 void ARMLowOverheadLoops::ConvertVPTBlocks(LowOverheadLoop &LoLoop) {  in ConvertVPTBlocks()  argument
1531   for (auto &Block : LoLoop.getVPTBlocks()) {  in ConvertVPTBlocks()
1548       LoLoop.BlockMasksToRecompute.insert(MIB.getInstr());  in ConvertVPTBlocks()
1549       LoLoop.ToRemove.insert(TheVCMP);  in ConvertVPTBlocks()
1602             LoLoop.BlockMasksToRecompute.insert(MIB.getInstr());  in ConvertVPTBlocks()
1611       LoLoop.ToRemove.insert(VPST);  in ConvertVPTBlocks()
1619         LoLoop.ToRemove.insert(VPST);  in ConvertVPTBlocks()
1621         LoLoop.BlockMasksToRecompute.insert(VPST);  in ConvertVPTBlocks()
1633           !LoLoop.ToRemove.contains(VprDef)) {  in ConvertVPTBlocks()
1646           LoLoop.ToRemove.insert(VPST);  in ConvertVPTBlocks()
1652   LoLoop.ToRemove.insert(LoLoop.VCTPs.begin(), LoLoop.VCTPs.end());  in ConvertVPTBlocks()
1655 void ARMLowOverheadLoops::Expand(LowOverheadLoop &LoLoop) {  in Expand()  argument
1658   auto ExpandLoopEnd = [this](LowOverheadLoop &LoLoop) {  in Expand()  argument
1659     MachineInstr *End = LoLoop.End;  in Expand()
1661     unsigned Opc = LoLoop.IsTailPredicationLegal() ?  in Expand()
1666     unsigned Off = LoLoop.Dec == LoLoop.End ? 1 : 0;  in Expand()
1670     LoLoop.ToRemove.insert(LoLoop.Dec);  in Expand()
1671     LoLoop.ToRemove.insert(End);  in Expand()
1692   if (LoLoop.Revert) {  in Expand()
1693     if (isWhileLoopStart(*LoLoop.Start))  in Expand()
1694       RevertWhile(LoLoop.Start);  in Expand()
1696       RevertDo(LoLoop.Start);  in Expand()
1697     if (LoLoop.Dec == LoLoop.End)  in Expand()
1698       RevertLoopEndDec(LoLoop.End);  in Expand()
1700       RevertLoopEnd(LoLoop.End, RevertLoopDec(LoLoop.Dec));  in Expand()
1702     LoLoop.Start = ExpandLoopStart(LoLoop);  in Expand()
1703     if (LoLoop.Start)  in Expand()
1704       RemoveDeadBranch(LoLoop.Start);  in Expand()
1705     LoLoop.End = ExpandLoopEnd(LoLoop);  in Expand()
1706     RemoveDeadBranch(LoLoop.End);  in Expand()
1707     if (LoLoop.IsTailPredicationLegal())  in Expand()
1708       ConvertVPTBlocks(LoLoop);  in Expand()
1709     for (auto *I : LoLoop.ToRemove) {  in Expand()
1713     for (auto *I : LoLoop.BlockMasksToRecompute) {  in Expand()
1720   PostOrderLoopTraversal DFS(LoLoop.ML, *MLI);  in Expand()