1 /** 2 * Copyright (c) 2025 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 ES2PANDA_IR_AST_NODE_HISTORY_H 17 #define ES2PANDA_IR_AST_NODE_HISTORY_H 18 19 #include "ir/astNode.h" 20 #include "util/doubleLinkedList.h" 21 22 namespace ark::es2panda::ir { 23 24 class AstNodeHistory { 25 public: 26 AstNodeHistory(AstNode *node, int32_t phaseId, ArenaAllocator *allocator); 27 28 AstNode *At(int32_t phaseId); 29 AstNode *Get(int32_t phaseId); 30 void Set(AstNode *node, int32_t phaseId); 31 32 private: 33 struct HistoryRecord { 34 AstNode *node; 35 int32_t phaseId; 36 }; 37 38 using HistoryList = util::ArenaDoubleLinkedList<HistoryRecord>; 39 40 AstNode *FindBackwardEquals(int32_t phaseId); 41 AstNode *FindForwardEquals(int32_t phaseId); 42 HistoryList::Item *FindLessOrEquals(int32_t phaseId); 43 44 HistoryList list_; // Node history list 45 HistoryList::Item *item_ {nullptr}; // Last accessed history record 46 }; 47 } // namespace ark::es2panda::ir 48 #endif 49