323     for (MachineBasicBlock *ChainBB : *Chain) {  in merge()
324       Blocks.push_back(ChainBB);  in merge()
325       assert(BlockToChain[ChainBB] == Chain && "Incoming blocks not in chain.");  in merge()
326       BlockToChain[ChainBB] = this;  in merge()
1829   for (MachineBasicBlock *ChainBB : Chain) {  in fillWorkLists()
1830     assert(BlockToChain[ChainBB] == &Chain &&  in fillWorkLists()
1832     for (MachineBasicBlock *Pred : ChainBB->predecessors()) {  in fillWorkLists()
2624       for (MachineBasicBlock *ChainBB : *Chain)  in collectLoopBlockSet()
2625         LoopBlockSet.insert(ChainBB);  in collectLoopBlockSet()
2704     for (MachineBasicBlock *ChainBB : LoopChain) {  in buildLoopChains()
2705       dbgs() << "          ... " << getBlockName(ChainBB) << "\n";  in buildLoopChains()
2706       if (!LoopBlockSet.remove(ChainBB)) {  in buildLoopChains()
2713                << "  Bad block:    " << getBlockName(ChainBB) << "\n";  in buildLoopChains()
2793     for (MachineBasicBlock *ChainBB : FunctionChain)  in buildCFGChains()
2794       if (!FunctionBlockSet.erase(ChainBB)) {  in buildCFGChains()
2797                << "  Bad block:    " << getBlockName(ChainBB) << "\n";  in buildCFGChains()
2826   for (MachineBasicBlock *ChainBB : FunctionChain) {  in buildCFGChains()
2827     LLVM_DEBUG(dbgs() << (ChainBB == *FunctionChain.begin() ? "Placing chain "  in buildCFGChains()
2829                       << getBlockName(ChainBB) << "\n");  in buildCFGChains()
2830     if (InsertPos != MachineFunction::iterator(ChainBB))  in buildCFGChains()
2831       F->splice(InsertPos, ChainBB);  in buildCFGChains()
2836     if (ChainBB == *FunctionChain.begin())  in buildCFGChains()
2838     MachineBasicBlock *PrevBB = &*std::prev(MachineFunction::iterator(ChainBB));  in buildCFGChains()
2907   for (MachineBasicBlock *ChainBB : FunctionChain) {  in optimizeBranches()
2910     if (!TII->analyzeBranch(*ChainBB, TBB, FBB, Cond, /*AllowModify*/ true)) {  in optimizeBranches()
2914           MBPI->getEdgeProbability(ChainBB, FBB) >  in optimizeBranches()
2915               MBPI->getEdgeProbability(ChainBB, TBB) &&  in optimizeBranches()
2918                           << getBlockName(ChainBB) << "\n");  in optimizeBranches()
2920                           << MBPI->getEdgeProbability(ChainBB, FBB) << " vs "  in optimizeBranches()
2921                           << MBPI->getEdgeProbability(ChainBB, TBB) << "\n");  in optimizeBranches()
2923         TII->removeBranch(*ChainBB);  in optimizeBranches()
2924         TII->insertBranch(*ChainBB, FBB, TBB, Cond, dl);  in optimizeBranches()
2946   for (MachineBasicBlock *ChainBB : FunctionChain) {  in alignBlocks()
2947     if (ChainBB == *FunctionChain.begin())  in alignBlocks()
2954     MachineLoop *L = MLI->getLoopFor(ChainBB);  in alignBlocks()
2986     BlockFrequency Freq = MBFI->getBlockFreq(ChainBB);  in alignBlocks()
2998     if (llvm::shouldOptimizeForSize(ChainBB, PSI, MBFI.get()) &&  in alignBlocks()
3005         &*std::prev(MachineFunction::iterator(ChainBB));  in alignBlocks()
3013         MaxBytes = TLI->getMaxPermittedBytesForAlignment(ChainBB);  in alignBlocks()
3014       ChainBB->setMaxBytesForAlignment(MaxBytes);  in alignBlocks()
3019     if (!LayoutPred->isSuccessor(ChainBB)) {  in alignBlocks()
3020       ChainBB->setAlignment(LoopAlign);  in alignBlocks()
3030         MBPI->getEdgeProbability(LayoutPred, ChainBB);  in alignBlocks()
3033       ChainBB->setAlignment(LoopAlign);  in alignBlocks()