116   Value *isValueEqualityComparison(TerminatorInst *TI);
117   BasicBlock *GetValueEqualityComparisonCases(TerminatorInst *TI,
119   bool SimplifyEqualityComparisonWithOnlyPredecessor(TerminatorInst *TI,
122   bool FoldValueComparisonIntoPredecessors(TerminatorInst *TI,
504 static void EraseTerminatorInstAndDCECond(TerminatorInst *TI) {  in EraseTerminatorInstAndDCECond()  argument
506   if (SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {  in EraseTerminatorInstAndDCECond()
508   } else if (BranchInst *BI = dyn_cast<BranchInst>(TI)) {  in EraseTerminatorInstAndDCECond()
511   } else if (IndirectBrInst *IBI = dyn_cast<IndirectBrInst>(TI)) {  in EraseTerminatorInstAndDCECond()
515   TI->eraseFromParent();  in EraseTerminatorInstAndDCECond()
521 Value *SimplifyCFGOpt::isValueEqualityComparison(TerminatorInst *TI) {  in isValueEqualityComparison()  argument
523   if (SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {  in isValueEqualityComparison()
529   } else if (BranchInst *BI = dyn_cast<BranchInst>(TI))  in isValueEqualityComparison()
550 GetValueEqualityComparisonCases(TerminatorInst *TI,  in GetValueEqualityComparisonCases()  argument
553   if (SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {  in GetValueEqualityComparisonCases()
561   BranchInst *BI = cast<BranchInst>(TI);  in GetValueEqualityComparisonCases()
618 SimplifyEqualityComparisonWithOnlyPredecessor(TerminatorInst *TI,  in SimplifyEqualityComparisonWithOnlyPredecessor()  argument
624   Value *ThisVal = isValueEqualityComparison(TI);  in SimplifyEqualityComparisonWithOnlyPredecessor()
639   BasicBlock *ThisDef = GetValueEqualityComparisonCases(TI, ThisCases);  in SimplifyEqualityComparisonWithOnlyPredecessor()
644   if (PredDef == TI->getParent()) {  in SimplifyEqualityComparisonWithOnlyPredecessor()
651     if (isa<BranchInst>(TI)) {  in SimplifyEqualityComparisonWithOnlyPredecessor()
660       ThisCases[0].Dest->removePredecessor(TI->getParent());  in SimplifyEqualityComparisonWithOnlyPredecessor()
663            << "Through successor TI: " << *TI << "Leaving: " << *NI << "\n");  in SimplifyEqualityComparisonWithOnlyPredecessor()
665       EraseTerminatorInstAndDCECond(TI);  in SimplifyEqualityComparisonWithOnlyPredecessor()
669     SwitchInst *SI = cast<SwitchInst>(TI);  in SimplifyEqualityComparisonWithOnlyPredecessor()
676                  << "Through successor TI: " << *TI);  in SimplifyEqualityComparisonWithOnlyPredecessor()
695         i.getCaseSuccessor()->removePredecessor(TI->getParent());  in SimplifyEqualityComparisonWithOnlyPredecessor()
704     DEBUG(dbgs() << "Leaving: " << *TI << "\n");  in SimplifyEqualityComparisonWithOnlyPredecessor()
711   BasicBlock *TIBB = TI->getParent();  in SimplifyEqualityComparisonWithOnlyPredecessor()
745             << "Through successor TI: " << *TI << "Leaving: " << *NI << "\n");  in SimplifyEqualityComparisonWithOnlyPredecessor()
747   EraseTerminatorInstAndDCECond(TI);  in SimplifyEqualityComparisonWithOnlyPredecessor()
785 static void GetBranchWeights(TerminatorInst *TI,  in GetBranchWeights()  argument
787   MDNode *MD = TI->getMetadata(LLVMContext::MD_prof);  in GetBranchWeights()
797   if (BranchInst* BI = dyn_cast<BranchInst>(TI)) {  in GetBranchWeights()
819 bool SimplifyCFGOpt::FoldValueComparisonIntoPredecessors(TerminatorInst *TI,  in FoldValueComparisonIntoPredecessors()  argument
821   BasicBlock *BB = TI->getParent();  in FoldValueComparisonIntoPredecessors()
822   Value *CV = isValueEqualityComparison(TI);  // CondVal  in FoldValueComparisonIntoPredecessors()
834     if (PCV == CV && SafeToMergeTerminators(TI, PTI)) {  in FoldValueComparisonIntoPredecessors()
837       BasicBlock *BBDefault = GetValueEqualityComparisonCases(TI, BBCases);  in FoldValueComparisonIntoPredecessors()
850       bool SuccHasWeights = HasBranchWeights(TI);  in FoldValueComparisonIntoPredecessors()
865         GetBranchWeights(TI, SuccWeights);  in FoldValueComparisonIntoPredecessors()
3050     TerminatorInst *TI = Preds[i]->getTerminator();  in SimplifyUnreachable()  local
3051     IRBuilder<> Builder(TI);  in SimplifyUnreachable()
3052     if (BranchInst *BI = dyn_cast<BranchInst>(TI)) {  in SimplifyUnreachable()
3055           new UnreachableInst(TI->getContext(), TI);  in SimplifyUnreachable()
3056           TI->eraseFromParent();  in SimplifyUnreachable()
3069     } else if (SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {  in SimplifyUnreachable()
3078     } else if (InvokeInst *II = dyn_cast<InvokeInst>(TI)) {  in SimplifyUnreachable()