1 /* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef ECMASCRIPT_COMPILER_LATER_ELIMINATION_H 17 #define ECMASCRIPT_COMPILER_LATER_ELIMINATION_H 18 19 #include "ecmascript/compiler/circuit_builder.h" 20 #include "ecmascript/compiler/gate_accessor.h" 21 #include "ecmascript/compiler/graph_visitor.h" 22 #include "ecmascript/compiler/base/depend_chain_helper.h" 23 #include "ecmascript/mem/chunk_containers.h" 24 25 namespace panda::ecmascript::kungfu { 26 class DependChains; 27 class LaterElimination : public GraphVisitor { 28 public: LaterElimination(Circuit * circuit,bool enableLog,const std::string & name,Chunk * chunk)29 LaterElimination(Circuit *circuit, bool enableLog, const std::string& name, Chunk* chunk) 30 : GraphVisitor(circuit, chunk), enableLog_(enableLog), 31 methodName_(name), dependChains_(chunk) {} 32 33 ~LaterElimination() = default; 34 35 void Run(); 36 37 GateRef VisitGate(GateRef gate) override; 38 bool CheckReplacement(GateRef lhs, GateRef rhs); 39 private: IsLogEnabled()40 bool IsLogEnabled() const 41 { 42 return enableLog_; 43 } 44 GetMethodName()45 const std::string& GetMethodName() const 46 { 47 return methodName_; 48 } 49 GetDependChain(GateRef dependIn)50 DependChains* GetDependChain(GateRef dependIn) 51 { 52 size_t idx = acc_.GetId(dependIn); 53 ASSERT(idx <= circuit_->GetMaxGateId()); 54 return dependChains_[idx]; 55 } 56 57 GateRef VisitDependEntry(GateRef gate); 58 GateRef UpdateDependChain(GateRef gate, DependChains* dependInfo); 59 GateRef TryEliminateGate(GateRef gate); 60 GateRef TryEliminateOther(GateRef gate); 61 GateRef TryEliminateDependSelector(GateRef gate); 62 63 bool enableLog_ {false}; 64 std::string methodName_; 65 ChunkVector<DependChains*> dependChains_; 66 }; 67 } // panda::ecmascript::kungfu 68 #endif // ECMASCRIPT_COMPILER_LATER_ELIMINATION_H