4  * you may not use this file except in compliance with the License.
92             GateRef use = *it;  in FindInBuilder()  local
96             VisitGateUse(use);  in FindInBuilder()
101 void StringBuilderOptimizer::VisitGateUse(GateRef use)  in VisitGateUse()  argument
103     Status useStatus = GetStatus(use);  in VisitGateUse()
108     auto useOpCode = acc_.GetOpCode(use);  in VisitGateUse()
109     if (useOpCode == OpCode::VALUE_SELECTOR && IsLoopHeader(use)) {  in VisitGateUse()
114         UpdateStatus(use, State::IN_STRING_BUILDER);  in VisitGateUse()
115         toVisit_.push_back(use);  in VisitGateUse()
118     // if this use is string-add  in VisitGateUse()
119     // we need to determine whether to set the current use to IN_STRING_BUILDER  in VisitGateUse()
122         GateRef left = acc_.GetValueIn(use, 0);  in VisitGateUse()
125             UpdateStatus(use, State::IN_STRING_BUILDER);  in VisitGateUse()
126             toVisit_.push_back(use);  in VisitGateUse()
128             curStringAddId_ = acc_.GetId(use);  in VisitGateUse()
130                 UpdateStatus(use, State::IN_STRING_BUILDER);  in VisitGateUse()
131                 toVisit_.push_back(use);  in VisitGateUse()
133                 SetStatus(use, State::INVALID_OPT);  in VisitGateUse()
136             SetStatus(use, State::INVALID_OPT);  in VisitGateUse()
167                 GateRef use = *it;  in FinalizeStringBuilders()  local
171                 auto useStatus = GetStatus(use);  in FinalizeStringBuilders()
175                     toVisit_.push_back(use);  in FinalizeStringBuilders()
177                 if (currIsLoopHeader && !LoopContains(curr, use)) {  in FinalizeStringBuilders()
219         GateRef use = *it;  in HasConcatOrPhiUse()  local
223         auto op = acc_.GetOpCode(use);  in HasConcatOrPhiUse()
224         if ((op == OpCode::STRING_ADD && HasConcatOrPhiUse(use)) || op == OpCode::VALUE_SELECTOR) {  in HasConcatOrPhiUse()
237         GateRef use = *it;  in CheckStringAddUses()  local
241         auto useOp = acc_.GetOpCode(use);  in CheckStringAddUses()
244             // or this gate has an invalid use  in CheckStringAddUses()
246             if (curStringAddId_ != acc_.GetId(use) || IsInvalidGate(use)) {  in CheckStringAddUses()
252         // this gate has a phi use, then check the phi use gate  in CheckStringAddUses()
253         if (useOp == OpCode::VALUE_SELECTOR && !CheckStringAddUses(use)) {  in CheckStringAddUses()
257 …  if (useOp == OpCode::ECMA_STRING_CHECK || acc_.IsFrameValues(use) || acc_.IsValueSelector(use)) {  in CheckStringAddUses()