prepare_for_register_allocation.h revision 2ed20afc6a1032e9e0cf919cb8d1b2b41e147182 
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  void VisitNullCheck(HNullCheck* check) OVERRIDE;
37  void VisitDivZeroCheck(HDivZeroCheck* check) OVERRIDE;
38  void VisitBoundsCheck(HBoundsCheck* check) OVERRIDE;
39  void VisitBoundType(HBoundType* bound_type) OVERRIDE;
40  void VisitClinitCheck(HClinitCheck* check) OVERRIDE;
41  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