537       BlockChain &LoopChain, const MachineBasicBlock *ExitingBB,
540       BlockChain &LoopChain, const MachineLoop &L,
2332 void MachineBlockPlacement::rotateLoop(BlockChain &LoopChain,  in rotateLoop()  argument
2339   MachineBasicBlock *Top = *LoopChain.begin();  in rotateLoop()
2340   MachineBasicBlock *Bottom = *std::prev(LoopChain.end());  in rotateLoop()
2370   BlockChain::iterator ExitIt = llvm::find(LoopChain, ExitingBB);  in rotateLoop()
2371   if (ExitIt == LoopChain.end())  in rotateLoop()
2394     assert(std::next(ExitIt) != LoopChain.end() &&  in rotateLoop()
2404   std::rotate(LoopChain.begin(), std::next(ExitIt), LoopChain.end());  in rotateLoop()
2421     BlockChain &LoopChain, const MachineLoop &L,  in rotateLoopWithProfile()  argument
2423   auto RotationPos = LoopChain.end();  in rotateLoopWithProfile()
2424   MachineBasicBlock *ChainHeaderBB = *LoopChain.begin();  in rotateLoopWithProfile()
2467   for (auto *BB : LoopChain) {  in rotateLoopWithProfile()
2486   for (auto Iter = LoopChain.begin(), TailIter = std::prev(LoopChain.end()),  in rotateLoopWithProfile()
2487             EndIter = LoopChain.end();  in rotateLoopWithProfile()
2491     if (TailIter == LoopChain.end())  in rotateLoopWithProfile()
2492       TailIter = LoopChain.begin();  in rotateLoopWithProfile()
2502     if (Iter != LoopChain.begin())  in rotateLoopWithProfile()
2550   if (RotationPos != LoopChain.end()) {  in rotateLoopWithProfile()
2553     std::rotate(LoopChain.begin(), RotationPos, LoopChain.end());  in rotateLoopWithProfile()
2639   BlockChain &LoopChain = *BlockToChain[LoopTop];  in buildLoopChains()  local
2645   assert(LoopChain.UnscheduledPredecessors == 0 &&  in buildLoopChains()
2647   UpdatedPreds.insert(&LoopChain);  in buildLoopChains()
2652   buildChain(LoopTop, LoopChain, &LoopBlockSet);  in buildLoopChains()
2655     rotateLoopWithProfile(LoopChain, L, LoopBlockSet);  in buildLoopChains()
2657     rotateLoop(LoopChain, PreferredLoopExit, ExitFreq, LoopBlockSet);  in buildLoopChains()
2662     if (LoopChain.UnscheduledPredecessors) {  in buildLoopChains()
2666              << "  Chain header: " << getBlockName(*LoopChain.begin()) << "\n";  in buildLoopChains()
2668     for (MachineBasicBlock *ChainBB : LoopChain) {  in buildLoopChains()
2676                << "  Chain header: " << getBlockName(*LoopChain.begin()) << "\n"  in buildLoopChains()
2686                << "  Chain header: " << getBlockName(*LoopChain.begin()) << "\n"  in buildLoopChains()