Transforms/Utils/BasicBlockUtils.cpp

121   BasicBlock *PredBB = BB->getUniquePredecessor();
122   if (!PredBB) return false;
125   if (PredBB == BB) return false;
127   if (isa<InvokeInst>(PredBB->getTerminator())) return false;
129   succ_iterator SI(succ_begin(PredBB)), SE(succ_end(PredBB));
155   PredBB->getInstList().pop_back();
159   BB->replaceAllUsesWith(PredBB);
162   PredBB->getInstList().splice(PredBB->end(), BB->getInstList());
165   if (!PredBB->hasName())
166     PredBB->takeName(BB);
172         DomTreeNode *PredDTN = DT->getNode(PredBB);