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/*
* Copyright (C) 2018 Yusuke Suzuki <utatane.tea@gmail.com>.
* Copyright (C) 2018-2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "CacheableIdentifier.h"
#include "CallLinkStatus.h"
#include "ObjectPropertyConditionSet.h"
#include "PropertyOffset.h"
#include "StructureSet.h"
#include <wtf/TZoneMalloc.h>
namespace JSC {
namespace DOMJIT {
class GetterSetter;
}
class CallLinkStatus;
class InByStatus;
struct DumpContext;
class InByVariant {
WTF_MAKE_TZONE_ALLOCATED(InByVariant);
public:
InByVariant(CacheableIdentifier, const StructureSet& = StructureSet(), PropertyOffset = invalidOffset, const ObjectPropertyConditionSet& = ObjectPropertyConditionSet(), std::unique_ptr<CallLinkStatus> = nullptr);
~InByVariant();
InByVariant(const InByVariant&);
InByVariant& operator=(const InByVariant&);
bool isSet() const { return !!m_structureSet.size(); }
explicit operator bool() const { return isSet(); }
const StructureSet& structureSet() const { return m_structureSet; }
StructureSet& structureSet() { return m_structureSet; }
// A non-empty condition set means that this is a prototype in-hit/in-miss.
const ObjectPropertyConditionSet& conditionSet() const { return m_conditionSet; }
PropertyOffset offset() const { return m_offset; }
CallLinkStatus* callLinkStatus() const { return m_callLinkStatus.get(); }
bool isHit() const { return offset() != invalidOffset; }
bool attemptToMerge(const InByVariant& other);
DECLARE_VISIT_AGGREGATE;
template<typename Visitor> void markIfCheap(Visitor&);
bool finalize(VM&);
void dump(PrintStream&) const;
void dumpInContext(PrintStream&, DumpContext*) const;
CacheableIdentifier identifier() const { return m_identifier; }
bool overlaps(const InByVariant& other)
{
if (!!m_identifier != !!other.m_identifier)
return true;
if (m_identifier) {
if (m_identifier != other.m_identifier)
return false;
}
return structureSet().overlaps(other.structureSet());
}
private:
friend class InByStatus;
StructureSet m_structureSet;
ObjectPropertyConditionSet m_conditionSet;
PropertyOffset m_offset;
CacheableIdentifier m_identifier;
std::unique_ptr<CallLinkStatus> m_callLinkStatus;
};
} // namespace JSC
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