409     SrcMBB = *SrcMBB->succ_begin();  in singlePathTo()
592   MachineBasicBlock::succ_iterator It = MBB->succ_begin();  in getFalseBranch()
691   for (MachineBasicBlock::succ_iterator It = SrcMBB->succ_begin(),  in cloneSuccessorList()
992   MachineBasicBlock *childBlk = *MBB->succ_begin();  in serialPatternMatch()
1026     && *TrueMBB->succ_begin() == *FalseMBB->succ_begin()) {  in ifPatternMatch()
1028     LandBlk = *TrueMBB->succ_begin();  in ifPatternMatch()
1029   } else if (TrueMBB->succ_size() == 1 && *TrueMBB->succ_begin() == FalseMBB) {  in ifPatternMatch()
1034              && *FalseMBB->succ_begin() == TrueMBB) {  in ifPatternMatch()
1043     LandBlk = *FalseMBB->succ_begin();  in ifPatternMatch()
1046     LandBlk = *TrueMBB->succ_begin();  in ifPatternMatch()
1236       Num += serialPatternMatch(*HeadMBB->succ_begin());  in handleJumpintoIfImp()
1237       Num += serialPatternMatch(*std::next(HeadMBB->succ_begin()));  in handleJumpintoIfImp()
1246     DownBlk = (DownBlk->succ_size() == 1) ? (*DownBlk->succ_begin()) : nullptr;  in handleJumpintoIfImp()
1652     SrcMBB = *SrcMBB->succ_begin();  in cloneOnSideEntryTo()
1750   MachineBasicBlock *MBB1 = *MBB->succ_begin();  in removeRedundantConditionalBranch()
1751   MachineBasicBlock *MBB2 = *std::next(MBB->succ_begin());  in removeRedundantConditionalBranch()
1786     MBB->removeSuccessor(*MBB->succ_begin());  in removeSuccessor()
1842     return findNearestCommonPostDom(*MBB1->succ_begin(), MBB2);  in findNearestCommonPostDom()
1844     return findNearestCommonPostDom(MBB1, *MBB2->succ_begin());  in findNearestCommonPostDom()