4  * you may not use this file except in compliance with the License.
96             GateRef use = *it;  in FindInBuilder()  local
100             VisitGateUse(use);  in FindInBuilder()
105 void StringBuilderOptimizer::VisitGateUse(GateRef use)  in VisitGateUse()  argument
107     Status useStatus = GetStatus(use);  in VisitGateUse()
112     auto useOpCode = acc_.GetOpCode(use);  in VisitGateUse()
113     if (useOpCode == OpCode::VALUE_SELECTOR && IsLoopHeader(use)) {  in VisitGateUse()
118         UpdateStatus(use, State::IN_STRING_BUILDER);  in VisitGateUse()
119         toVisit_.push_back(use);  in VisitGateUse()
122     // if this use is string-add  in VisitGateUse()
123     // we need to determine whether to set the current use to IN_STRING_BUILDER  in VisitGateUse()
126         GateRef left = acc_.GetValueIn(use, 0);  in VisitGateUse()
129             UpdateStatus(use, State::IN_STRING_BUILDER);  in VisitGateUse()
130             toVisit_.push_back(use);  in VisitGateUse()
132             curStringAddId_ = acc_.GetId(use);  in VisitGateUse()
134                 UpdateStatus(use, State::IN_STRING_BUILDER);  in VisitGateUse()
135                 toVisit_.push_back(use);  in VisitGateUse()
137                 SetStatus(use, State::INVALID_OPT);  in VisitGateUse()
140             SetStatus(use, State::INVALID_OPT);  in VisitGateUse()
171                 GateRef use = *it;  in FinalizeStringBuilders()  local
175                 auto useStatus = GetStatus(use);  in FinalizeStringBuilders()
179                     toVisit_.push_back(use);  in FinalizeStringBuilders()
181                 if (currIsLoopHeader && !LoopContains(curr, use)) {  in FinalizeStringBuilders()
223         GateRef use = *it;  in HasConcatOrPhiUse()  local
227         auto op = acc_.GetOpCode(use);  in HasConcatOrPhiUse()
228         if ((op == OpCode::STRING_ADD && HasConcatOrPhiUse(use)) || op == OpCode::VALUE_SELECTOR) {  in HasConcatOrPhiUse()
241         GateRef use = *it;  in CheckStringAddUses()  local
245         auto useOp = acc_.GetOpCode(use);  in CheckStringAddUses()
248             // or this gate has an invalid use  in CheckStringAddUses()
250             if (curStringAddId_ != acc_.GetId(use) || IsInvalidGate(use)) {  in CheckStringAddUses()
256         // this gate has a phi use, then check the phi use gate  in CheckStringAddUses()
257         if (useOp == OpCode::VALUE_SELECTOR && !CheckStringAddUses(use)) {  in CheckStringAddUses()
262             acc_.IsFrameValues(use) || acc_.IsValueSelector(use)) {  in CheckStringAddUses()