518     void ConvertVPTBlocks(LowOverheadLoop &LoLoop);
520     MachineInstr *ExpandLoopStart(LowOverheadLoop &LoLoop);
522     void Expand(LowOverheadLoop &LoLoop);
524     void IterationCountDCE(LowOverheadLoop &LoLoop);
1347   LowOverheadLoop LoLoop(*ML, *MLI, *RDA, *TRI, *TII);  in ProcessLoop()  local
1351   if (LoLoop.Preheader)  in ProcessLoop()
1352     LoLoop.Start = SearchForStart(LoLoop.Preheader);  in ProcessLoop()
1364         LoLoop.Dec = &MI;  in ProcessLoop()
1366         LoLoop.End = &MI;  in ProcessLoop()
1368         LoLoop.End = LoLoop.Dec = &MI;  in ProcessLoop()
1370         LoLoop.Start = &MI;  in ProcessLoop()
1375         LoLoop.Revert = true;  in ProcessLoop()
1380         LoLoop.AnalyseMVEInst(&MI);  in ProcessLoop()
1385   LLVM_DEBUG(LoLoop.dump());  in ProcessLoop()
1386   if (!LoLoop.FoundAllComponents()) {  in ProcessLoop()
1391   assert(LoLoop.Start->getOpcode() != ARM::t2WhileLoopStart &&  in ProcessLoop()
1397   if (LoLoop.Dec != LoLoop.End) {  in ProcessLoop()
1399     RDA->getReachingLocalUses(LoLoop.Dec, MCRegister::from(ARM::LR), Uses);  in ProcessLoop()
1400     if (Uses.size() > 1 || !Uses.count(LoLoop.End)) {  in ProcessLoop()
1402       LoLoop.Revert = true;  in ProcessLoop()
1405   LoLoop.Validate(BBUtils.get());  in ProcessLoop()
1406   Expand(LoLoop);  in ProcessLoop()
1511 void ARMLowOverheadLoops::IterationCountDCE(LowOverheadLoop &LoLoop) {  in IterationCountDCE()  argument
1512   if (!LoLoop.IsTailPredicationLegal())  in IterationCountDCE()
1517   MachineInstr *Def = RDA->getMIOperand(LoLoop.Start, 1);  in IterationCountDCE()
1524   SmallPtrSet<MachineInstr*, 4> Killed  = { LoLoop.Start, LoLoop.Dec,  in IterationCountDCE()
1525                                             LoLoop.End };  in IterationCountDCE()
1526   if (!TryRemove(Def, *RDA, LoLoop.ToRemove, Killed))  in IterationCountDCE()
1530 MachineInstr* ARMLowOverheadLoops::ExpandLoopStart(LowOverheadLoop &LoLoop) {  in ExpandLoopStart()  argument
1534   IterationCountDCE(LoLoop);  in ExpandLoopStart()
1536   MachineBasicBlock::iterator InsertPt = LoLoop.StartInsertPt;  in ExpandLoopStart()
1537   MachineInstr *Start = LoLoop.Start;  in ExpandLoopStart()
1538   MachineBasicBlock *MBB = LoLoop.StartInsertBB;  in ExpandLoopStart()
1539   unsigned Opc = LoLoop.getStartOpcode();  in ExpandLoopStart()
1540   MachineOperand &Count = LoLoop.getLoopStartOperand();  in ExpandLoopStart()
1561   LoLoop.ToRemove.insert(Start);  in ExpandLoopStart()
1565 void ARMLowOverheadLoops::ConvertVPTBlocks(LowOverheadLoop &LoLoop) {  in ConvertVPTBlocks()  argument
1578   for (auto &Block : LoLoop.getVPTBlocks()) {  in ConvertVPTBlocks()
1595       LoLoop.BlockMasksToRecompute.insert(MIB.getInstr());  in ConvertVPTBlocks()
1596       LoLoop.ToRemove.insert(TheVCMP);  in ConvertVPTBlocks()
1600     if (LoLoop.VPTstate.isEntryPredicatedOnVCTP(Block, /*exclusive*/ true)) {  in ConvertVPTBlocks()
1649             LoLoop.BlockMasksToRecompute.insert(MIB.getInstr());  in ConvertVPTBlocks()
1658       LoLoop.ToRemove.insert(VPST);  in ConvertVPTBlocks()
1666         LoLoop.ToRemove.insert(VPST);  in ConvertVPTBlocks()
1668         LoLoop.BlockMasksToRecompute.insert(VPST);  in ConvertVPTBlocks()
1680           !LoLoop.ToRemove.contains(VprDef)) {  in ConvertVPTBlocks()
1693           LoLoop.ToRemove.insert(VPST);  in ConvertVPTBlocks()
1699   LoLoop.ToRemove.insert(LoLoop.VCTPs.begin(), LoLoop.VCTPs.end());  in ConvertVPTBlocks()
1702 void ARMLowOverheadLoops::Expand(LowOverheadLoop &LoLoop) {  in Expand()  argument
1705   auto ExpandLoopEnd = [this](LowOverheadLoop &LoLoop) {  in Expand()  argument
1706     MachineInstr *End = LoLoop.End;  in Expand()
1708     unsigned Opc = LoLoop.IsTailPredicationLegal() ?  in Expand()
1713     unsigned Off = LoLoop.Dec == LoLoop.End ? 1 : 0;  in Expand()
1717     LoLoop.ToRemove.insert(LoLoop.Dec);  in Expand()
1718     LoLoop.ToRemove.insert(End);  in Expand()
1764   if (LoLoop.Revert) {  in Expand()
1765     if (isWhileLoopStart(*LoLoop.Start))  in Expand()
1766       RevertWhile(LoLoop.Start);  in Expand()
1768       RevertDo(LoLoop.Start);  in Expand()
1769     if (LoLoop.Dec == LoLoop.End)  in Expand()
1770       RevertLoopEndDec(LoLoop.End);  in Expand()
1772       RevertLoopEnd(LoLoop.End, RevertLoopDec(LoLoop.Dec));  in Expand()
1774     ExpandVMOVCopies(LoLoop.VMOVCopies);  in Expand()
1775     LoLoop.Start = ExpandLoopStart(LoLoop);  in Expand()
1776     if (LoLoop.Start)  in Expand()
1777       RemoveDeadBranch(LoLoop.Start);  in Expand()
1778     LoLoop.End = ExpandLoopEnd(LoLoop);  in Expand()
1779     RemoveDeadBranch(LoLoop.End);  in Expand()
1780     if (LoLoop.IsTailPredicationLegal())  in Expand()
1781       ConvertVPTBlocks(LoLoop);  in Expand()
1782     for (auto *I : LoLoop.ToRemove) {  in Expand()
1786     for (auto *I : LoLoop.BlockMasksToRecompute) {  in Expand()
1793   PostOrderLoopTraversal DFS(LoLoop.ML, *MLI);  in Expand()