394     bool canMergeBlocks(const BasicBlock *BB, const BasicBlock *DestBB) const;
396     bool isMergingEmptyBlockProfitable(BasicBlock *BB, BasicBlock *DestBB,
762   BasicBlock *DestBB = BI->getSuccessor(0);  in findDestBlockOfMergeableEmptyBlock()  local
763   if (DestBB == BB)  in findDestBlockOfMergeableEmptyBlock()
766   if (!canMergeBlocks(BB, DestBB))  in findDestBlockOfMergeableEmptyBlock()
767     DestBB = nullptr;  in findDestBlockOfMergeableEmptyBlock()
769   return DestBB;  in findDestBlockOfMergeableEmptyBlock()
798     BasicBlock *DestBB = findDestBlockOfMergeableEmptyBlock(BB);  in eliminateMostlyEmptyBlocks()  local
799     if (!DestBB ||  in eliminateMostlyEmptyBlocks()
800         !isMergingEmptyBlockProfitable(BB, DestBB, Preheaders.count(BB)))  in eliminateMostlyEmptyBlocks()
810                                                    BasicBlock *DestBB,  in isMergingEmptyBlockProfitable()  argument
827         if (DestBB == CBI->getSuccessor(i))  in isMergingEmptyBlockProfitable()
859   if (!isa<PHINode>(DestBB->begin()))  in isMergingEmptyBlockProfitable()
866   for (BasicBlock *DestBBPred : predecessors(DestBB)) {  in isMergingEmptyBlockProfitable()
870     if (llvm::all_of(DestBB->phis(), [&](const PHINode &DestPN) {  in isMergingEmptyBlockProfitable()
888         DestBB == findDestBlockOfMergeableEmptyBlock(SameValueBB))  in isMergingEmptyBlockProfitable()
899                                     const BasicBlock *DestBB) const {  in canMergeBlocks()
906       if (UI->getParent() != DestBB || !isa<PHINode>(UI))  in canMergeBlocks()
911       if (UI->getParent() == DestBB) {  in canMergeBlocks()
926   const PHINode *DestBBPN = dyn_cast<PHINode>(DestBB->begin());  in canMergeBlocks()
943       for (const PHINode &PN : DestBB->phis()) {  in canMergeBlocks()
965   BasicBlock *DestBB = BI->getSuccessor(0);  in eliminateMostlyEmptyBlock()  local
968                     << *BB << *DestBB);  in eliminateMostlyEmptyBlock()
972   if (BasicBlock *SinglePred = DestBB->getSinglePredecessor()) {  in eliminateMostlyEmptyBlock()
973     if (SinglePred != DestBB) {  in eliminateMostlyEmptyBlock()
977       MergeBlockIntoPredecessor(DestBB);  in eliminateMostlyEmptyBlock()
987   for (PHINode &PN : DestBB->phis()) {  in eliminateMostlyEmptyBlock()
1014   BB->replaceAllUsesWith(DestBB);  in eliminateMostlyEmptyBlock()
1018   LLVM_DEBUG(dbgs() << "AFTER:\n" << *DestBB << "\n\n\n");  in eliminateMostlyEmptyBlock()