542       BlockChain &LoopChain, const MachineBasicBlock *ExitingBB,
545       BlockChain &LoopChain, const MachineLoop &L,
2368 void MachineBlockPlacement::rotateLoop(BlockChain &LoopChain,  in rotateLoop()  argument
2375   MachineBasicBlock *Top = *LoopChain.begin();  in rotateLoop()
2376   MachineBasicBlock *Bottom = *std::prev(LoopChain.end());  in rotateLoop()
2406   BlockChain::iterator ExitIt = llvm::find(LoopChain, ExitingBB);  in rotateLoop()
2407   if (ExitIt == LoopChain.end())  in rotateLoop()
2430     assert(std::next(ExitIt) != LoopChain.end() &&  in rotateLoop()
2440   std::rotate(LoopChain.begin(), std::next(ExitIt), LoopChain.end());  in rotateLoop()
2457     BlockChain &LoopChain, const MachineLoop &L,  in rotateLoopWithProfile()  argument
2459   auto RotationPos = LoopChain.end();  in rotateLoopWithProfile()
2460   MachineBasicBlock *ChainHeaderBB = *LoopChain.begin();  in rotateLoopWithProfile()
2503   for (auto *BB : LoopChain) {  in rotateLoopWithProfile()
2522   for (auto Iter = LoopChain.begin(), TailIter = std::prev(LoopChain.end()),  in rotateLoopWithProfile()
2523             EndIter = LoopChain.end();  in rotateLoopWithProfile()
2527     if (TailIter == LoopChain.end())  in rotateLoopWithProfile()
2528       TailIter = LoopChain.begin();  in rotateLoopWithProfile()
2538     if (Iter != LoopChain.begin())  in rotateLoopWithProfile()
2586   if (RotationPos != LoopChain.end()) {  in rotateLoopWithProfile()
2589     std::rotate(LoopChain.begin(), RotationPos, LoopChain.end());  in rotateLoopWithProfile()
2675   BlockChain &LoopChain = *BlockToChain[LoopTop];  in buildLoopChains()  local
2681   assert(LoopChain.UnscheduledPredecessors == 0 &&  in buildLoopChains()
2683   UpdatedPreds.insert(&LoopChain);  in buildLoopChains()
2688   buildChain(LoopTop, LoopChain, &LoopBlockSet);  in buildLoopChains()
2691     rotateLoopWithProfile(LoopChain, L, LoopBlockSet);  in buildLoopChains()
2693     rotateLoop(LoopChain, PreferredLoopExit, ExitFreq, LoopBlockSet);  in buildLoopChains()
2698     if (LoopChain.UnscheduledPredecessors) {  in buildLoopChains()
2702              << "  Chain header: " << getBlockName(*LoopChain.begin()) << "\n";  in buildLoopChains()
2704     for (MachineBasicBlock *ChainBB : LoopChain) {  in buildLoopChains()
2712                << "  Chain header: " << getBlockName(*LoopChain.begin()) << "\n"  in buildLoopChains()
2722                << "  Chain header: " << getBlockName(*LoopChain.begin()) << "\n"  in buildLoopChains()