1/*
2 * Copyright (C) 2013 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "InstructionStream.h"
29#include <wtf/HashSet.h>
30
31namespace JSC {
32
33// Reference count indicates number of live registers that alias this object.
34class StaticPropertyAnalysis : public RefCounted<StaticPropertyAnalysis> {
35public:
36 static Ref<StaticPropertyAnalysis> create(InstructionStream::MutableRef&& instructionRef)
37 {
38 return adoptRef(*new StaticPropertyAnalysis(WTFMove(instructionRef)));
39 }
40
41 void addPropertyIndex(unsigned propertyIndex) { m_propertyIndexes.add(propertyIndex); }
42
43 void record();
44
45 int propertyIndexCount() { return m_propertyIndexes.size(); }
46
47private:
48 StaticPropertyAnalysis(InstructionStream::MutableRef&& instructionRef)
49 : m_instructionRef(WTFMove(instructionRef))
50 {
51 }
52
53 InstructionStream::MutableRef m_instructionRef;
54 typedef HashSet<unsigned, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> PropertyIndexSet;
55 PropertyIndexSet m_propertyIndexes;
56};
57
58} // namespace JSC
59