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_SSA_TYPE_PROPAGATION_H_
18#define ART_COMPILER_OPTIMIZING_SSA_TYPE_PROPAGATION_H_
19
20#include "nodes.h"
21
22namespace art {
23
24// Compute and propagate types of phis in the graph.
25class SsaTypePropagation : public ValueObject {
26 public:
27  explicit SsaTypePropagation(HGraph* graph)
28      : graph_(graph), worklist_(graph->GetArena(), kDefaultWorklistSize) {}
29
30  void Run();
31
32 private:
33  void VisitBasicBlock(HBasicBlock* block);
34  void ProcessWorklist();
35  void AddToWorklist(HPhi* phi);
36  void AddDependentInstructionsToWorklist(HPhi* phi);
37
38  HGraph* const graph_;
39  GrowableArray<HPhi*> worklist_;
40
41  static constexpr size_t kDefaultWorklistSize = 8;
42
43  DISALLOW_COPY_AND_ASSIGN(SsaTypePropagation);
44};
45
46}  // namespace art
47
48#endif  // ART_COMPILER_OPTIMIZING_SSA_TYPE_PROPAGATION_H_
49