473       iset_(nullptr),  in HLoopOptimization()
550     iset_ = &iset;  in LocalRun()
558     iset_ = nullptr;  in LocalRun()
662         for (HInstruction* i : *iset_) {  in SimplifyInduction()
665         DCHECK(CheckInductionSetFullyRemoved(iset_));  in SimplifyInduction()
2250   iset_->clear();  in TrySetPhiInduction()
2278       iset_->insert(i);  // copy  in TrySetPhiInduction()
2286   DCHECK(iset_->empty());  in TrySetPhiReduction()
2305           iset_->size() == 1;  in TrySetPhiReduction()
2306       iset_->clear();  // leave the way you found it  in TrySetPhiReduction()
2320   iset_->clear();  in TrySetSimpleLoopHeader()
2353           iset_->insert(c);  in TrySetSimpleLoopHeader()
2354           iset_->insert(s);  in TrySetSimpleLoopHeader()
2370     if (!instruction->IsGoto() && iset_->find(instruction) == iset_->end()) {  in IsEmptyBody()
2395     if (iset_->find(user) == iset_->end()) {  // not excluded?  in IsOnlyUsedAfterLoop()
2401           iset_->insert(user);  in IsOnlyUsedAfterLoop()
2424       if (iset_->find(user) == iset_->end()) {  // not excluded?  in TryReplaceWithLastValue()
2440       if (iset_->find(user->GetHolder()) == iset_->end()) {  // not excluded?  in TryReplaceWithLastValue()
2479   for (HInstruction* i : *iset_) {  in CanRemoveCycle()