4  * you may not use this file except in compliance with the License.
97             GateRef use = *it;  in FindInBuilder()  local
101             VisitGateUse(use);  in FindInBuilder()
106 void StringBuilderOptimizer::VisitGateUse(GateRef use)  in VisitGateUse()  argument
108     Status useStatus = GetStatus(use);  in VisitGateUse()
113     auto useOpCode = acc_.GetOpCode(use);  in VisitGateUse()
114     if (useOpCode == OpCode::VALUE_SELECTOR && IsLoopHeader(use)) {  in VisitGateUse()
119         UpdateStatus(use, State::IN_STRING_BUILDER);  in VisitGateUse()
120         toVisit_.push_back(use);  in VisitGateUse()
123     // if this use is string-add  in VisitGateUse()
124     // we need to determine whether to set the current use to IN_STRING_BUILDER  in VisitGateUse()
127         GateRef left = acc_.GetValueIn(use, 0);  in VisitGateUse()
130             UpdateStatus(use, State::IN_STRING_BUILDER);  in VisitGateUse()
131             toVisit_.push_back(use);  in VisitGateUse()
133             curStringAddId_ = acc_.GetId(use);  in VisitGateUse()
135                 UpdateStatus(use, State::IN_STRING_BUILDER);  in VisitGateUse()
136                 toVisit_.push_back(use);  in VisitGateUse()
138                 SetStatus(use, State::INVALID_OPT);  in VisitGateUse()
141             SetStatus(use, State::INVALID_OPT);  in VisitGateUse()
172                 GateRef use = *it;  in FinalizeStringBuilders()  local
176                 auto useStatus = GetStatus(use);  in FinalizeStringBuilders()
180                     toVisit_.push_back(use);  in FinalizeStringBuilders()
182                 if (currIsLoopHeader && !LoopContains(curr, use)) {  in FinalizeStringBuilders()
224         GateRef use = *it;  in HasConcatOrPhiUse()  local
228         auto op = acc_.GetOpCode(use);  in HasConcatOrPhiUse()
229         if ((op == OpCode::STRING_ADD && HasConcatOrPhiUse(use)) || op == OpCode::VALUE_SELECTOR) {  in HasConcatOrPhiUse()
242         GateRef use = *it;  in CheckStringAddUses()  local
246         auto useOp = acc_.GetOpCode(use);  in CheckStringAddUses()
249             // or this gate has an invalid use  in CheckStringAddUses()
251             if (curStringAddId_ != acc_.GetId(use) || IsInvalidGate(use)) {  in CheckStringAddUses()
257         // this gate has a phi use, then check the phi use gate  in CheckStringAddUses()
258         if (useOp == OpCode::VALUE_SELECTOR && !CheckStringAddUses(use)) {  in CheckStringAddUses()
262 …  if (useOp == OpCode::ECMA_STRING_CHECK || acc_.IsFrameValues(use) || acc_.IsValueSelector(use)) {  in CheckStringAddUses()