431       const BlockChain &SuccChain, BranchProbability SuccProb,
593     BlockChain &SuccChain = *BlockToChain[Succ];  in markBlockSuccessors()  local
595     if (&Chain == &SuccChain || Succ == LoopHeaderBB)  in markBlockSuccessors()
600     if (SuccChain.UnscheduledPredecessors == 0 ||  in markBlockSuccessors()
601         --SuccChain.UnscheduledPredecessors > 0)  in markBlockSuccessors()
604     auto *NewBB = *SuccChain.begin();  in markBlockSuccessors()
642       BlockChain *SuccChain = BlockToChain[Succ];  in collectViableSuccessors()  local
643       if (SuccChain == &Chain) {  in collectViableSuccessors()
645       } else if (Succ != *SuccChain->begin()) {  in collectViableSuccessors()
1278     const BlockChain &SuccChain, BranchProbability SuccProb,  in hasBetterLayoutPredecessor()  argument
1283   if (SuccChain.UnscheduledPredecessors == 0)  in hasBetterLayoutPredecessor()
1407     if (Pred == Succ || BlockToChain[Pred] == &SuccChain ||  in hasBetterLayoutPredecessor()
1477     BlockChain *SuccChain = BlockToChain[Succ];  in selectBestSuccessor()  local
1479         SuccChain != &Chain && Succ == *SuccChain->begin())  in selectBestSuccessor()
1499     BlockChain &SuccChain = *BlockToChain[Succ];  in selectBestSuccessor()  local
1502     if (hasBetterLayoutPredecessor(BB, Succ, SuccChain, SuccProb, RealSuccProb,  in selectBestSuccessor()
1513                << (SuccChain.UnscheduledPredecessors != 0 ? " (CFG break)" : "")  in selectBestSuccessor()
1594     BlockChain &SuccChain = *BlockToChain[MBB];  in selectBestCandidateBlock()  local
1595     if (&SuccChain == &Chain)  in selectBestCandidateBlock()
1598     assert(SuccChain.UnscheduledPredecessors == 0 &&  in selectBestCandidateBlock()
1745     BlockChain &SuccChain = *BlockToChain[BestSucc];  in buildChain()  local
1748     SuccChain.UnscheduledPredecessors = 0;  in buildChain()
1751     markChainSuccessors(SuccChain, LoopHeaderBB, BlockFilter);  in buildChain()
1752     Chain.merge(BestSucc, &SuccChain);  in buildChain()
1878       BlockChain &SuccChain = *BlockToChain[Succ];  in findBestLoopExit()  local
1880       if (&Chain == &SuccChain) {  in findBestLoopExit()
1984       BlockChain *SuccChain = BlockToChain[Succ];  in rotateLoop()  local
1986           (!SuccChain || Succ == *SuccChain->begin()))  in rotateLoop()
2088       BlockChain *SuccChain = BlockToChain[Succ];  in rotateLoopWithProfile()  local
2090           (!SuccChain || Succ == *SuccChain->begin())) {  in rotateLoopWithProfile()