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/*
* Copyright (C) 2020-2023 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/Box.h>
#include <wtf/TZoneMalloc.h>
namespace JSC {
class CallLinkStatus;
class DeleteByStatus;
struct DumpContext;
class DeleteByVariant {
WTF_MAKE_TZONE_ALLOCATED(DeleteByVariant);
public:
DeleteByVariant(
CacheableIdentifier, bool result,
Structure* oldStrucutre, Structure* newStructure, PropertyOffset);
~DeleteByVariant();
DeleteByVariant(const DeleteByVariant&);
DeleteByVariant& operator=(const DeleteByVariant&);
Structure* oldStructure() const { return m_oldStructure; }
Structure* newStructure() const { return m_newStructure; }
bool result() const { return m_result; }
bool writesStructures() const;
PropertyOffset offset() const { return m_offset; }
bool isPropertyUnset() const { return offset() == invalidOffset; }
bool attemptToMerge(const DeleteByVariant& 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 DeleteByVariant& other)
{
if (!!m_identifier != !!other.m_identifier)
return true;
if (m_identifier) {
if (m_identifier != other.m_identifier)
return false;
}
return m_oldStructure == other.m_oldStructure;
}
private:
friend class DeleteByStatus;
bool m_result;
Structure* m_oldStructure;
Structure* m_newStructure;
PropertyOffset m_offset;
CacheableIdentifier m_identifier;
};
} // namespace JSC
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