1 /* 2 * Copyright (C) 2017 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_CODE_SINKING_H_ 18 #define ART_COMPILER_OPTIMIZING_CODE_SINKING_H_ 19 20 #include "nodes.h" 21 #include "optimization.h" 22 23 namespace art { 24 25 /** 26 * Optimization pass to move instructions into uncommon branches, 27 * when it is safe to do so. 28 */ 29 class CodeSinking : public HOptimization { 30 public: CodeSinking(HGraph * graph,OptimizingCompilerStats * stats)31 CodeSinking(HGraph* graph, OptimizingCompilerStats* stats) 32 : HOptimization(graph, kCodeSinkingPassName, stats) {} 33 34 void Run() OVERRIDE; 35 36 static constexpr const char* kCodeSinkingPassName = "code_sinking"; 37 38 private: 39 // Try to move code only used by `end_block` and all its post-dominated / dominated 40 // blocks, to these blocks. 41 void SinkCodeToUncommonBranch(HBasicBlock* end_block); 42 43 DISALLOW_COPY_AND_ASSIGN(CodeSinking); 44 }; 45 46 } // namespace art 47 48 #endif // ART_COMPILER_OPTIMIZING_CODE_SINKING_H_ 49