constant_folding.h revision b2a58477e14e1b15cb9848d16015a49a854ee32c 
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_CONSTANT_FOLDING_H_
18#define ART_COMPILER_OPTIMIZING_CONSTANT_FOLDING_H_
19
20#include "nodes.h"
21#include "optimization.h"
22
23namespace art {
24
25/**
26 * Optimization pass performing a simple constant-expression
27 * evaluation on the SSA form.
28 *
29 * This class is named art::HConstantFolding to avoid name
30 * clashes with the art::ConstantPropagation class defined in
31 * compiler/dex/post_opt_passes.h.
32 */
33class HConstantFolding : public HOptimization {
34 public:
35  explicit HConstantFolding(HGraph* graph, const char* name = kConstantFoldingPassName)
36      : HOptimization(graph, true, name) {}
37
38  void Run() OVERRIDE;
39
40  static constexpr const char* kConstantFoldingPassName = "constant_folding";
41
42 private:
43  DISALLOW_COPY_AND_ASSIGN(HConstantFolding);
44};
45
46}  // namespace art
47
48#endif  // ART_COMPILER_OPTIMIZING_CONSTANT_FOLDING_H_
49