mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
/*
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* Copyright (C) 2018 Yusuke Suzuki <utatane.tea@gmail.com>.
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* Copyright (C) 2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "InByIdVariant.h"
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namespace JSC {
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InByIdVariant::InByIdVariant(const StructureSet& structureSet, PropertyOffset offset, const ObjectPropertyConditionSet& conditionSet)
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: m_structureSet(structureSet)
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, m_conditionSet(conditionSet)
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, m_offset(offset)
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{
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if (!structureSet.size()) {
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ASSERT(offset == invalidOffset);
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ASSERT(conditionSet.isEmpty());
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}
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}
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bool InByIdVariant::attemptToMerge(const InByIdVariant& other)
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{
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if (m_offset != other.m_offset)
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return false;
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if (m_conditionSet.isEmpty() != other.m_conditionSet.isEmpty())
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return false;
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ObjectPropertyConditionSet mergedConditionSet;
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if (!m_conditionSet.isEmpty()) {
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mergedConditionSet = m_conditionSet.mergedWith(other.m_conditionSet);
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if (!mergedConditionSet.isValid())
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return false;
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// If this is a hit variant, one slot base should exist. If this is not a hit variant, the slot base is not necessary.
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if (isHit() && !mergedConditionSet.hasOneSlotBaseCondition())
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return false;
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}
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m_conditionSet = mergedConditionSet;
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m_structureSet.merge(other.m_structureSet);
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return true;
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}
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void InByIdVariant::markIfCheap(SlotVisitor& visitor)
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{
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m_structureSet.markIfCheap(visitor);
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}
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bool InByIdVariant::finalize(VM& vm)
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{
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if (!m_structureSet.isStillAlive(vm))
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return false;
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if (!m_conditionSet.areStillLive(vm))
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return false;
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return true;
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}
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void InByIdVariant::dump(PrintStream& out) const
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{
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dumpInContext(out, nullptr);
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}
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void InByIdVariant::dumpInContext(PrintStream& out, DumpContext* context) const
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{
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if (!isSet()) {
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out.print("<empty>");
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return;
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}
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out.print(
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"<", inContext(structureSet(), context), ", ", inContext(m_conditionSet, context));
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out.print(", offset = ", offset());
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out.print(">");
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}
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} // namespace JSC
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