reference_type_propagation.h revision 61d544bfb812d79f5c9ddad171198836cea719db
1/* 2 * Copyright (C) 2015 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_REFERENCE_TYPE_PROPAGATION_H_ 18#define ART_COMPILER_OPTIMIZING_REFERENCE_TYPE_PROPAGATION_H_ 19 20#include "driver/dex_compilation_unit.h" 21#include "handle_scope-inl.h" 22#include "nodes.h" 23#include "optimization.h" 24#include "optimizing_compiler_stats.h" 25 26namespace art { 27 28/** 29 * Propagates reference types to instructions. 30 */ 31class ReferenceTypePropagation : public HOptimization { 32 public: 33 ReferenceTypePropagation(HGraph* graph, 34 const DexFile& dex_file, 35 const DexCompilationUnit& dex_compilation_unit, 36 StackHandleScopeCollection* handles) 37 : HOptimization(graph, true, "reference_type_propagation"), 38 dex_file_(dex_file), 39 dex_compilation_unit_(dex_compilation_unit), 40 handles_(handles), 41 worklist_(graph->GetArena(), kDefaultWorklistSize) {} 42 43 void Run() OVERRIDE; 44 45 private: 46 void VisitNewInstance(HNewInstance* new_instance); 47 void VisitLoadClass(HLoadClass* load_class); 48 void VisitPhi(HPhi* phi); 49 void VisitBasicBlock(HBasicBlock* block); 50 51 void UpdateBoundType(HBoundType* bound_type) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 52 void UpdatePhi(HPhi* phi) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 53 54 void BoundTypeForIfNotNull(HBasicBlock* block); 55 void BoundTypeForIfInstanceOf(HBasicBlock* block); 56 57 void ProcessWorklist(); 58 void AddToWorklist(HInstruction* instr); 59 void AddDependentInstructionsToWorklist(HInstruction* instr); 60 61 bool UpdateNullability(HInstruction* instr); 62 bool UpdateReferenceTypeInfo(HInstruction* instr); 63 64 ReferenceTypeInfo MergeTypes(const ReferenceTypeInfo& a, const ReferenceTypeInfo& b) 65 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 66 67 const DexFile& dex_file_; 68 const DexCompilationUnit& dex_compilation_unit_; 69 StackHandleScopeCollection* handles_; 70 71 GrowableArray<HInstruction*> worklist_; 72 73 static constexpr size_t kDefaultWorklistSize = 8; 74 75 DISALLOW_COPY_AND_ASSIGN(ReferenceTypePropagation); 76}; 77 78} // namespace art 79 80#endif // ART_COMPILER_OPTIMIZING_REFERENCE_TYPE_PROPAGATION_H_ 81