1/*
2 * Copyright (C) 2018 Yusuke Suzuki <[email protected]>.
3 * Copyright (C) 2018 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include "ObjectPropertyConditionSet.h"
30#include "PropertyOffset.h"
31#include "StructureSet.h"
32
33namespace JSC {
34namespace DOMJIT {
35class GetterSetter;
36}
37
38class InByIdStatus;
39struct DumpContext;
40
41class InByIdVariant {
42 WTF_MAKE_FAST_ALLOCATED;
43public:
44 InByIdVariant(const StructureSet& = StructureSet(), PropertyOffset = invalidOffset, const ObjectPropertyConditionSet& = ObjectPropertyConditionSet());
45
46 bool isSet() const { return !!m_structureSet.size(); }
47 explicit operator bool() const { return isSet(); }
48 const StructureSet& structureSet() const { return m_structureSet; }
49 StructureSet& structureSet() { return m_structureSet; }
50
51 // A non-empty condition set means that this is a prototype in-hit/in-miss.
52 const ObjectPropertyConditionSet& conditionSet() const { return m_conditionSet; }
53
54 PropertyOffset offset() const { return m_offset; }
55
56 bool isHit() const { return offset() != invalidOffset; }
57
58 bool attemptToMerge(const InByIdVariant& other);
59
60 void markIfCheap(SlotVisitor&);
61 bool finalize(VM&);
62
63 void dump(PrintStream&) const;
64 void dumpInContext(PrintStream&, DumpContext*) const;
65
66 bool overlaps(const InByIdVariant& other)
67 {
68 return structureSet().overlaps(other.structureSet());
69 }
70
71private:
72 friend class InByIdStatus;
73
74 StructureSet m_structureSet;
75 ObjectPropertyConditionSet m_conditionSet;
76 PropertyOffset m_offset;
77};
78
79} // namespace JSC
80