301     for (MachineBasicBlock *ChainBB : *Chain) {  in merge()
302       Blocks.push_back(ChainBB);  in merge()
303       assert(BlockToChain[ChainBB] == Chain && "Incoming blocks not in chain.");  in merge()
304       BlockToChain[ChainBB] = this;  in merge()
1769   for (MachineBasicBlock *ChainBB : Chain) {  in fillWorkLists()
1770     assert(BlockToChain[ChainBB] == &Chain &&  in fillWorkLists()
1772     for (MachineBasicBlock *Pred : ChainBB->predecessors()) {  in fillWorkLists()
2554       for (MachineBasicBlock *ChainBB : *Chain)  in collectLoopBlockSet()
2555         LoopBlockSet.insert(ChainBB);  in collectLoopBlockSet()
2634     for (MachineBasicBlock *ChainBB : LoopChain) {  in buildLoopChains()
2635       dbgs() << "          ... " << getBlockName(ChainBB) << "\n";  in buildLoopChains()
2636       if (!LoopBlockSet.remove(ChainBB)) {  in buildLoopChains()
2643                << "  Bad block:    " << getBlockName(ChainBB) << "\n";  in buildLoopChains()
2723     for (MachineBasicBlock *ChainBB : FunctionChain)  in buildCFGChains()
2724       if (!FunctionBlockSet.erase(ChainBB)) {  in buildCFGChains()
2727                << "  Bad block:    " << getBlockName(ChainBB) << "\n";  in buildCFGChains()
2756   for (MachineBasicBlock *ChainBB : FunctionChain) {  in buildCFGChains()
2757     LLVM_DEBUG(dbgs() << (ChainBB == *FunctionChain.begin() ? "Placing chain "  in buildCFGChains()
2759                       << getBlockName(ChainBB) << "\n");  in buildCFGChains()
2760     if (InsertPos != MachineFunction::iterator(ChainBB))  in buildCFGChains()
2761       F->splice(InsertPos, ChainBB);  in buildCFGChains()
2766     if (ChainBB == *FunctionChain.begin())  in buildCFGChains()
2768     MachineBasicBlock *PrevBB = &*std::prev(MachineFunction::iterator(ChainBB));  in buildCFGChains()
2837   for (MachineBasicBlock *ChainBB : FunctionChain) {  in optimizeBranches()
2840     if (!TII->analyzeBranch(*ChainBB, TBB, FBB, Cond, /*AllowModify*/ true)) {  in optimizeBranches()
2844           MBPI->getEdgeProbability(ChainBB, FBB) >  in optimizeBranches()
2845               MBPI->getEdgeProbability(ChainBB, TBB) &&  in optimizeBranches()
2848                           << getBlockName(ChainBB) << "\n");  in optimizeBranches()
2850                           << MBPI->getEdgeProbability(ChainBB, FBB) << " vs "  in optimizeBranches()
2851                           << MBPI->getEdgeProbability(ChainBB, TBB) << "\n");  in optimizeBranches()
2853         TII->removeBranch(*ChainBB);  in optimizeBranches()
2854         TII->insertBranch(*ChainBB, FBB, TBB, Cond, dl);  in optimizeBranches()
2876   for (MachineBasicBlock *ChainBB : FunctionChain) {  in alignBlocks()
2877     if (ChainBB == *FunctionChain.begin())  in alignBlocks()
2884     MachineLoop *L = MLI->getLoopFor(ChainBB);  in alignBlocks()
2894     BlockFrequency Freq = MBFI->getBlockFreq(ChainBB);  in alignBlocks()
2906     if (llvm::shouldOptimizeForSize(ChainBB, PSI, MBFI.get()) &&  in alignBlocks()
2913         &*std::prev(MachineFunction::iterator(ChainBB));  in alignBlocks()
2917     if (!LayoutPred->isSuccessor(ChainBB)) {  in alignBlocks()
2918       ChainBB->setAlignment(Align);  in alignBlocks()
2927         MBPI->getEdgeProbability(LayoutPred, ChainBB);  in alignBlocks()
2930       ChainBB->setAlignment(Align);  in alignBlocks()