prepare_for_register_allocation.h revision b1498f67b444c897fa8f1530777ef118e05aa631
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_PREPARE_FOR_REGISTER_ALLOCATION_H_ 18#define ART_COMPILER_OPTIMIZING_PREPARE_FOR_REGISTER_ALLOCATION_H_ 19 20#include "nodes.h" 21 22namespace art { 23 24/** 25 * A simplification pass over the graph before doing register allocation. 26 * For example it changes uses of null checks and bounds checks to the original 27 * objects, to avoid creating a live range for these checks. 28 */ 29class PrepareForRegisterAllocation : public HGraphDelegateVisitor { 30 public: 31 explicit PrepareForRegisterAllocation(HGraph* graph) : HGraphDelegateVisitor(graph) {} 32 33 void Run(); 34 35 private: 36 virtual void VisitNullCheck(HNullCheck* check) OVERRIDE; 37 virtual void VisitDivZeroCheck(HDivZeroCheck* check) OVERRIDE; 38 virtual void VisitBoundsCheck(HBoundsCheck* check) OVERRIDE; 39 virtual void VisitBoundType(HBoundType* bound_type) OVERRIDE; 40 virtual void VisitClinitCheck(HClinitCheck* check) OVERRIDE; 41 virtual void VisitCondition(HCondition* condition) OVERRIDE; 42 43 DISALLOW_COPY_AND_ASSIGN(PrepareForRegisterAllocation); 44}; 45 46} // namespace art 47 48#endif // ART_COMPILER_OPTIMIZING_PREPARE_FOR_REGISTER_ALLOCATION_H_ 49