1 /* 2 * Copyright (c) 2022 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_ASYNC_FUNCTION_LOWRING_H_ 17 #define ECMASCRIPT_COMPILER_ASYNC_FUNCTION_LOWRING_H_ 18 19 #include "ecmascript/compiler/bytecode_circuit_builder.h" 20 #include "ecmascript/compiler/circuit.h" 21 #include "ecmascript/compiler/circuit_builder-inl.h" 22 #include "ecmascript/compiler/circuit_builder.h" 23 #include "ecmascript/compiler/graph_visitor.h" 24 #include "ecmascript/mem/chunk_containers.h" 25 26 namespace panda::ecmascript::kungfu { 27 class AsyncFunctionLowering { 28 public: AsyncFunctionLowering(BytecodeCircuitBuilder * bcBuilder,Circuit * circuit,CompilationConfig * cmpCfg,bool enableLog,const std::string & name)29 AsyncFunctionLowering(BytecodeCircuitBuilder *bcBuilder, Circuit *circuit, CompilationConfig *cmpCfg, 30 bool enableLog, const std::string& name) 31 : bcBuilder_(bcBuilder), circuit_(circuit), builder_(circuit, cmpCfg), enableLog_(enableLog), 32 accessor_(circuit), argAccessor_(circuit), stateEntry_(GetEntryBBStateOut()), 33 dependEntry_(GetEntryBBDependOut()), methodName_(name) 34 { 35 } 36 37 ~AsyncFunctionLowering() = default; 38 39 void ProcessAll(); 40 41 bool IsAsyncRelated() const; 42 GetMethodName()43 const std::string& GetMethodName() const 44 { 45 return methodName_; 46 } 47 48 private: IsLogEnabled()49 bool IsLogEnabled() const 50 { 51 return enableLog_; 52 } 53 54 void ProcessJumpTable(); 55 56 void RebuildGeneratorCfg(GateRef resumeGate, GateRef restoreOffsetGate, GateRef ifFalseCondition, GateRef newTarget, 57 GateRef &firstState); 58 59 void UpdateValueSelector(GateRef prevLoopBeginGate, GateRef controlStateGate, GateRef prevBcOffsetPhiGate, 60 bool genNewValuePhiGate = true); 61 62 void CheckResumeInLoopBody(GateRef stateInGate, bool &resumeInLoopBody); 63 64 void ModifyStateInput(GateRef stateInGate, GateRef ifBranch, GateRef ifFalse); 65 66 GateRef GetDependPhiFromLoopBegin(GateRef loopbegin) const; 67 68 GateRef GetEntryBBStateOut() const; 69 70 GateRef GetEntryBBDependOut() const; 71 72 BytecodeCircuitBuilder *bcBuilder_; 73 Circuit *circuit_; 74 CircuitBuilder builder_; 75 bool enableLog_ {false}; 76 GateAccessor accessor_; 77 ArgumentAccessor argAccessor_; 78 GateRef stateEntry_ {Circuit::NullGate()}; 79 GateRef dependEntry_ {Circuit::NullGate()}; 80 std::string methodName_; 81 }; 82 } // panda::ecmascript::kungfu 83 84 #endif // ECMASCRIPT_COMPILER_ASYNC_FUNCTION_LOWRING_H_ 85