312     for (MachineBasicBlock *ChainBB : *Chain) {  in merge()
313       Blocks.push_back(ChainBB);  in merge()
314       assert(BlockToChain[ChainBB] == Chain && "Incoming blocks not in chain.");  in merge()
315       BlockToChain[ChainBB] = this;  in merge()
1789   for (MachineBasicBlock *ChainBB : Chain) {  in fillWorkLists()
1790     assert(BlockToChain[ChainBB] == &Chain &&  in fillWorkLists()
1792     for (MachineBasicBlock *Pred : ChainBB->predecessors()) {  in fillWorkLists()
2576       for (MachineBasicBlock *ChainBB : *Chain)  in collectLoopBlockSet()
2577         LoopBlockSet.insert(ChainBB);  in collectLoopBlockSet()
2656     for (MachineBasicBlock *ChainBB : LoopChain) {  in buildLoopChains()
2657       dbgs() << "          ... " << getBlockName(ChainBB) << "\n";  in buildLoopChains()
2658       if (!LoopBlockSet.remove(ChainBB)) {  in buildLoopChains()
2665                << "  Bad block:    " << getBlockName(ChainBB) << "\n";  in buildLoopChains()
2745     for (MachineBasicBlock *ChainBB : FunctionChain)  in buildCFGChains()
2746       if (!FunctionBlockSet.erase(ChainBB)) {  in buildCFGChains()
2749                << "  Bad block:    " << getBlockName(ChainBB) << "\n";  in buildCFGChains()
2778   for (MachineBasicBlock *ChainBB : FunctionChain) {  in buildCFGChains()
2779     LLVM_DEBUG(dbgs() << (ChainBB == *FunctionChain.begin() ? "Placing chain "  in buildCFGChains()
2781                       << getBlockName(ChainBB) << "\n");  in buildCFGChains()
2782     if (InsertPos != MachineFunction::iterator(ChainBB))  in buildCFGChains()
2783       F->splice(InsertPos, ChainBB);  in buildCFGChains()
2788     if (ChainBB == *FunctionChain.begin())  in buildCFGChains()
2790     MachineBasicBlock *PrevBB = &*std::prev(MachineFunction::iterator(ChainBB));  in buildCFGChains()
2859   for (MachineBasicBlock *ChainBB : FunctionChain) {  in optimizeBranches()
2862     if (!TII->analyzeBranch(*ChainBB, TBB, FBB, Cond, /*AllowModify*/ true)) {  in optimizeBranches()
2866           MBPI->getEdgeProbability(ChainBB, FBB) >  in optimizeBranches()
2867               MBPI->getEdgeProbability(ChainBB, TBB) &&  in optimizeBranches()
2870                           << getBlockName(ChainBB) << "\n");  in optimizeBranches()
2872                           << MBPI->getEdgeProbability(ChainBB, FBB) << " vs "  in optimizeBranches()
2873                           << MBPI->getEdgeProbability(ChainBB, TBB) << "\n");  in optimizeBranches()
2875         TII->removeBranch(*ChainBB);  in optimizeBranches()
2876         TII->insertBranch(*ChainBB, FBB, TBB, Cond, dl);  in optimizeBranches()
2898   for (MachineBasicBlock *ChainBB : FunctionChain) {  in alignBlocks()
2899     if (ChainBB == *FunctionChain.begin())  in alignBlocks()
2906     MachineLoop *L = MLI->getLoopFor(ChainBB);  in alignBlocks()
2916     BlockFrequency Freq = MBFI->getBlockFreq(ChainBB);  in alignBlocks()
2928     if (llvm::shouldOptimizeForSize(ChainBB, PSI, MBFI.get()) &&  in alignBlocks()
2935         &*std::prev(MachineFunction::iterator(ChainBB));  in alignBlocks()
2943         MaxBytes = TLI->getMaxPermittedBytesForAlignment(ChainBB);  in alignBlocks()
2944       ChainBB->setMaxBytesForAlignment(MaxBytes);  in alignBlocks()
2949     if (!LayoutPred->isSuccessor(ChainBB)) {  in alignBlocks()
2950       ChainBB->setAlignment(Align);  in alignBlocks()
2960         MBPI->getEdgeProbability(LayoutPred, ChainBB);  in alignBlocks()
2963       ChainBB->setAlignment(Align);  in alignBlocks()