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_INSTRUCTION_SIMPLIFIER_H_ 18 #define ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_H_ 19 20 #include "nodes.h" 21 #include "optimization.h" 22 #include "optimizing_compiler_stats.h" 23 24 namespace art { 25 26 class CodeGenerator; 27 class CompilerDriver; 28 29 /** 30 * Implements optimizations specific to each instruction. 31 * 32 * Note that graph simplifications producing a constant should be 33 * implemented in art::HConstantFolding, while graph simplifications 34 * not producing constants should be implemented in 35 * art::InstructionSimplifier. (This convention is a choice that was 36 * made during the development of these parts of the compiler and is 37 * not bound by any technical requirement.) 38 */ 39 class InstructionSimplifier : public HOptimization { 40 public: 41 InstructionSimplifier(HGraph* graph, 42 CodeGenerator* codegen, 43 CompilerDriver* compiler_driver, 44 OptimizingCompilerStats* stats = nullptr, 45 const char* name = kInstructionSimplifierPassName) HOptimization(graph,name,stats)46 : HOptimization(graph, name, stats), 47 codegen_(codegen), 48 compiler_driver_(compiler_driver) {} 49 50 static constexpr const char* kInstructionSimplifierPassName = "instruction_simplifier"; 51 52 void Run() OVERRIDE; 53 54 private: 55 CodeGenerator* codegen_; 56 CompilerDriver* compiler_driver_; 57 58 DISALLOW_COPY_AND_ASSIGN(InstructionSimplifier); 59 }; 60 61 } // namespace art 62 63 #endif // ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_H_ 64