78     Value *foldIVUser(Instruction *UseInst, Instruction *IVOperand);
80     bool eliminateIdentitySCEV(Instruction *UseInst, Instruction *IVOperand);
81     bool replaceIVUserWithLoopInvariant(Instruction *UseInst);
85     bool eliminateIVUser(Instruction *UseInst, Instruction *IVOperand);
107 Value *SimplifyIndvar::foldIVUser(Instruction *UseInst, Instruction *IVOperand) {  in foldIVUser()  argument
112   switch (UseInst->getOpcode()) {  in foldIVUser()
119     if (IVOperand != UseInst->getOperand(OperIdx) ||  in foldIVUser()
120         !isa<ConstantInt>(UseInst->getOperand(1)))  in foldIVUser()
133     ConstantInt *D = cast<ConstantInt>(UseInst->getOperand(1));  in foldIVUser()
134     if (UseInst->getOpcode() == Instruction::LShr) {  in foldIVUser()
136       uint32_t BitWidth = cast<IntegerType>(UseInst->getType())->getBitWidth();  in foldIVUser()
140       D = ConstantInt::get(UseInst->getContext(),  in foldIVUser()
146     if (UseInst->isExact() &&  in foldIVUser()
151   if (!SE->isSCEVable(UseInst->getType()))  in foldIVUser()
155   if (SE->getSCEV(UseInst) != FoldedExpr)  in foldIVUser()
159                     << " -> " << *UseInst << '\n');  in foldIVUser()
161   UseInst->setOperand(OperIdx, IVSrc);  in foldIVUser()
162   assert(SE->getSCEV(UseInst) == FoldedExpr && "bad SCEV with folded oper");  in foldIVUser()
165     UseInst->dropPoisonGeneratingFlags();  in foldIVUser()
622 bool SimplifyIndvar::eliminateIVUser(Instruction *UseInst,  in eliminateIVUser()  argument
624   if (ICmpInst *ICmp = dyn_cast<ICmpInst>(UseInst)) {  in eliminateIVUser()
628   if (BinaryOperator *Bin = dyn_cast<BinaryOperator>(UseInst)) {  in eliminateIVUser()
639   if (auto *CI = dyn_cast<CallInst>(UseInst))  in eliminateIVUser()
643   if (auto *TI = dyn_cast<TruncInst>(UseInst))  in eliminateIVUser()
647   if (eliminateIdentitySCEV(UseInst, IVOperand))  in eliminateIVUser()
688 bool SimplifyIndvar::eliminateIdentitySCEV(Instruction *UseInst,  in eliminateIdentitySCEV()  argument
690   if (!SE->isSCEVable(UseInst->getType()) ||  in eliminateIdentitySCEV()
691       (UseInst->getType() != IVOperand->getType()) ||  in eliminateIdentitySCEV()
692       (SE->getSCEV(UseInst) != SE->getSCEV(IVOperand)))  in eliminateIdentitySCEV()
711   if (isa<PHINode>(UseInst))  in eliminateIdentitySCEV()
714     if (!DT || !DT->dominates(IVOperand, UseInst))  in eliminateIdentitySCEV()
717   if (!LI->replacementPreservesLCSSAForm(UseInst, IVOperand))  in eliminateIdentitySCEV()
720   LLVM_DEBUG(dbgs() << "INDVARS: Eliminated identity: " << *UseInst << '\n');  in eliminateIdentitySCEV()
722   UseInst->replaceAllUsesWith(IVOperand);  in eliminateIdentitySCEV()
725   DeadInsts.emplace_back(UseInst);  in eliminateIdentitySCEV()
900     Instruction *UseInst = UseOper.first;  in simplifyUsers()  local
906     if (isInstructionTriviallyDead(UseInst, /* TLI */ nullptr)) {  in simplifyUsers()
907       DeadInsts.emplace_back(UseInst);  in simplifyUsers()
912     if (UseInst == CurrIV) continue;  in simplifyUsers()
916     if (replaceIVUserWithLoopInvariant(UseInst))  in simplifyUsers()
923       Value *NewOper = foldIVUser(UseInst, IVOperand);  in simplifyUsers()
931     if (eliminateIVUser(UseInst, IVOperand)) {  in simplifyUsers()
936     if (BinaryOperator *BO = dyn_cast<BinaryOperator>(UseInst)) {  in simplifyUsers()
946     CastInst *Cast = dyn_cast<CastInst>(UseInst);  in simplifyUsers()
951     if (isSimpleIVUser(UseInst, L, SE)) {  in simplifyUsers()
952       pushIVUsers(UseInst, L, Simplified, SimpleIVUsers);  in simplifyUsers()