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/*
* Copyright (C) 2014 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.
*/
#include "config.h"
#include "GetByIdVariant.h"
#include "CallLinkStatus.h"
#include "JSCInlines.h"
#include <wtf/ListDump.h>
namespace JSC {
GetByIdVariant::GetByIdVariant(
const StructureSet& structureSet, PropertyOffset offset,
const IntendedStructureChain* chain, std::unique_ptr<CallLinkStatus> callLinkStatus)
: m_structureSet(structureSet)
, m_alternateBase(nullptr)
, m_offset(offset)
, m_callLinkStatus(WTF::move(callLinkStatus))
{
if (!structureSet.size()) {
ASSERT(offset == invalidOffset);
ASSERT(!chain);
}
if (chain && chain->size()) {
m_alternateBase = chain->terminalPrototype();
chain->gatherChecks(m_constantChecks);
}
}
GetByIdVariant::~GetByIdVariant() { }
GetByIdVariant::GetByIdVariant(const GetByIdVariant& other)
: GetByIdVariant()
{
*this = other;
}
GetByIdVariant& GetByIdVariant::operator=(const GetByIdVariant& other)
{
m_structureSet = other.m_structureSet;
m_constantChecks = other.m_constantChecks;
m_alternateBase = other.m_alternateBase;
m_offset = other.m_offset;
if (other.m_callLinkStatus)
m_callLinkStatus = std::make_unique<CallLinkStatus>(*other.m_callLinkStatus);
else
m_callLinkStatus = nullptr;
return *this;
}
StructureSet GetByIdVariant::baseStructure() const
{
if (!m_alternateBase)
return structureSet();
Structure* structure = structureFor(m_constantChecks, m_alternateBase);
RELEASE_ASSERT(structure);
return structure;
}
bool GetByIdVariant::attemptToMerge(const GetByIdVariant& other)
{
if (m_alternateBase != other.m_alternateBase)
return false;
if (m_offset != other.m_offset)
return false;
if (m_callLinkStatus || other.m_callLinkStatus)
return false;
if (!areCompatible(m_constantChecks, other.m_constantChecks))
return false;
mergeInto(other.m_constantChecks, m_constantChecks);
m_structureSet.merge(other.m_structureSet);
return true;
}
void GetByIdVariant::dump(PrintStream& out) const
{
dumpInContext(out, 0);
}
void GetByIdVariant::dumpInContext(PrintStream& out, DumpContext* context) const
{
if (!isSet()) {
out.print("<empty>");
return;
}
out.print(
"<", inContext(structureSet(), context), ", ",
"[", listDumpInContext(m_constantChecks, context), "]");
if (m_alternateBase)
out.print(", alternateBase = ", inContext(JSValue(m_alternateBase), context));
out.print(", offset = ", offset());
if (m_callLinkStatus)
out.print(", call = ", *m_callLinkStatus);
out.print(">");
}
} // namespace JSC
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