1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_COMPILER_OPTIMIZING_SIDE_EFFECTS_ANALYSIS_H_ 18 #define ART_COMPILER_OPTIMIZING_SIDE_EFFECTS_ANALYSIS_H_ 19 20 #include "base/arena_containers.h" 21 #include "base/macros.h" 22 #include "nodes.h" 23 #include "optimization.h" 24 25 namespace art HIDDEN { 26 27 class SideEffectsAnalysis : public HOptimization { 28 public: 29 explicit SideEffectsAnalysis(HGraph* graph, const char* pass_name = kSideEffectsAnalysisPassName) HOptimization(graph,pass_name)30 : HOptimization(graph, pass_name), 31 graph_(graph), 32 block_effects_(graph->GetBlocks().size(), 33 graph->GetAllocator()->Adapter(kArenaAllocSideEffectsAnalysis)), 34 loop_effects_(graph->GetBlocks().size(), 35 graph->GetAllocator()->Adapter(kArenaAllocSideEffectsAnalysis)) {} 36 37 SideEffects GetLoopEffects(HBasicBlock* block) const; 38 SideEffects GetBlockEffects(HBasicBlock* block) const; 39 40 // Compute side effects of individual blocks and loops. 41 bool Run(); 42 HasRun()43 bool HasRun() const { return has_run_; } 44 45 static constexpr const char* kSideEffectsAnalysisPassName = "side_effects"; 46 47 private: 48 void UpdateLoopEffects(HLoopInformation* info, SideEffects effects); 49 50 HGraph* graph_; 51 52 // Checked in debug build, to ensure the pass has been run prior to 53 // running a pass that depends on it. 54 bool has_run_ = false; 55 56 // Side effects of individual blocks, that is the union of the side effects 57 // of the instructions in the block. 58 ArenaVector<SideEffects> block_effects_; 59 60 // Side effects of loops, that is the union of the side effects of the 61 // blocks contained in that loop. 62 ArenaVector<SideEffects> loop_effects_; 63 64 ART_FRIEND_TEST(GVNTest, LoopSideEffects); 65 DISALLOW_COPY_AND_ASSIGN(SideEffectsAnalysis); 66 }; 67 68 } // namespace art 69 70 #endif // ART_COMPILER_OPTIMIZING_SIDE_EFFECTS_ANALYSIS_H_ 71