515       BlockChain &LoopChain, const MachineBasicBlock *ExitingBB,
518       BlockChain &LoopChain, const MachineLoop &L,
2297 void MachineBlockPlacement::rotateLoop(BlockChain &LoopChain,  in rotateLoop()  argument
2304   MachineBasicBlock *Top = *LoopChain.begin();  in rotateLoop()
2305   MachineBasicBlock *Bottom = *std::prev(LoopChain.end());  in rotateLoop()
2335   BlockChain::iterator ExitIt = llvm::find(LoopChain, ExitingBB);  in rotateLoop()
2336   if (ExitIt == LoopChain.end())  in rotateLoop()
2359     assert(std::next(ExitIt) != LoopChain.end() &&  in rotateLoop()
2369   std::rotate(LoopChain.begin(), std::next(ExitIt), LoopChain.end());  in rotateLoop()
2386     BlockChain &LoopChain, const MachineLoop &L,  in rotateLoopWithProfile()  argument
2388   auto RotationPos = LoopChain.end();  in rotateLoopWithProfile()
2389   MachineBasicBlock *ChainHeaderBB = *LoopChain.begin();  in rotateLoopWithProfile()
2432   for (auto BB : LoopChain) {  in rotateLoopWithProfile()
2451   for (auto Iter = LoopChain.begin(), TailIter = std::prev(LoopChain.end()),  in rotateLoopWithProfile()
2452             EndIter = LoopChain.end();  in rotateLoopWithProfile()
2456     if (TailIter == LoopChain.end())  in rotateLoopWithProfile()
2457       TailIter = LoopChain.begin();  in rotateLoopWithProfile()
2467     if (Iter != LoopChain.begin())  in rotateLoopWithProfile()
2516   if (RotationPos != LoopChain.end()) {  in rotateLoopWithProfile()
2519     std::rotate(LoopChain.begin(), RotationPos, LoopChain.end());  in rotateLoopWithProfile()
2605   BlockChain &LoopChain = *BlockToChain[LoopTop];  in buildLoopChains()  local
2611   assert(LoopChain.UnscheduledPredecessors == 0 &&  in buildLoopChains()
2613   UpdatedPreds.insert(&LoopChain);  in buildLoopChains()
2618   buildChain(LoopTop, LoopChain, &LoopBlockSet);  in buildLoopChains()
2621     rotateLoopWithProfile(LoopChain, L, LoopBlockSet);  in buildLoopChains()
2623     rotateLoop(LoopChain, PreferredLoopExit, ExitFreq, LoopBlockSet);  in buildLoopChains()
2628     if (LoopChain.UnscheduledPredecessors) {  in buildLoopChains()
2632              << "  Chain header: " << getBlockName(*LoopChain.begin()) << "\n";  in buildLoopChains()
2634     for (MachineBasicBlock *ChainBB : LoopChain) {  in buildLoopChains()
2642                << "  Chain header: " << getBlockName(*LoopChain.begin()) << "\n"  in buildLoopChains()
2652                << "  Chain header: " << getBlockName(*LoopChain.begin()) << "\n"  in buildLoopChains()