65   BasicBlock *BB = I->getParent();  in ChangeToUnreachable()  local
68   for (succ_iterator SI = succ_begin(BB), SE = succ_end(BB); SI != SE; ++SI)  in ChangeToUnreachable()
69     (*SI)->removePredecessor(BB);  in ChangeToUnreachable()
75       Intrinsic::getDeclaration(BB->getParent()->getParent(), Intrinsic::trap);  in ChangeToUnreachable()
82   BasicBlock::iterator BBI = I, BBE = BB->end();  in ChangeToUnreachable()
86     BB->getInstList().erase(BBI++);  in ChangeToUnreachable()
92   BasicBlock *BB = II->getParent();  in ChangeToCall()  local
105   II->getUnwindDest()->removePredecessor(BB);  in ChangeToCall()
106   BB->getInstList().erase(II);  in ChangeToCall()
109 static bool MarkAliveBlocks(BasicBlock *BB,  in MarkAliveBlocks()  argument
113   Worklist.push_back(BB);  in MarkAliveBlocks()
116     BB = Worklist.pop_back_val();  in MarkAliveBlocks()
118     if (!Reachable.insert(BB))  in MarkAliveBlocks()
124     for (BasicBlock::iterator BBI = BB->begin(), E = BB->end(); BBI != E;++BBI){  in MarkAliveBlocks()
160     if (InvokeInst *II = dyn_cast<InvokeInst>(BB->getTerminator()))  in MarkAliveBlocks()
166     Changed |= ConstantFoldTerminator(BB, true);  in MarkAliveBlocks()
167     for (succ_iterator SI = succ_begin(BB), SE = succ_end(BB); SI != SE; ++SI)  in MarkAliveBlocks()
189   for (Function::iterator BB = ++F.begin(), E = F.end(); BB != E; ++BB) {  in RemoveUnreachableBlocksFromFn()  local
190     if (Reachable.count(BB))  in RemoveUnreachableBlocksFromFn()
193     for (succ_iterator SI = succ_begin(BB), SE = succ_end(BB); SI != SE; ++SI)  in RemoveUnreachableBlocksFromFn()
195         (*SI)->removePredecessor(BB);  in RemoveUnreachableBlocksFromFn()
196     BB->dropAllReferences();  in RemoveUnreachableBlocksFromFn()
217     BasicBlock &BB = *BBI++;  in MergeEmptyReturnBlocks()  local
220     ReturnInst *Ret = dyn_cast<ReturnInst>(BB.getTerminator());  in MergeEmptyReturnBlocks()
225     if (Ret != &BB.front()) {  in MergeEmptyReturnBlocks()
230       while (isa<DbgInfoIntrinsic>(I) && I != BB.begin())  in MergeEmptyReturnBlocks()
233           (!isa<PHINode>(I) || I != BB.begin() ||  in MergeEmptyReturnBlocks()
241       RetBlock = &BB;  in MergeEmptyReturnBlocks()
254       BB.replaceAllUsesWith(RetBlock);  in MergeEmptyReturnBlocks()
255       BB.eraseFromParent();  in MergeEmptyReturnBlocks()
276     RetBlockPHI->addIncoming(Ret->getOperand(0), &BB);  in MergeEmptyReturnBlocks()
277     BB.getTerminator()->eraseFromParent();  in MergeEmptyReturnBlocks()
278     BranchInst::Create(RetBlock, &BB);  in MergeEmptyReturnBlocks()