/* * Copyright (C) 2013 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 <wtf/HashSet.h> namespace JSC { // Reference count indicates number of live registers that alias this object. class StaticPropertyAnalysis : public RefCounted<StaticPropertyAnalysis> { public: static Ref<StaticPropertyAnalysis> create(Vector<UnlinkedInstruction, 0, UnsafeVectorOverflow>* instructions, unsigned target) { return adoptRef(*new StaticPropertyAnalysis(instructions, target)); } void addPropertyIndex(unsigned propertyIndex) { m_propertyIndexes.add(propertyIndex); } void record() { (*m_instructions)[m_target] = m_propertyIndexes.size(); } int propertyIndexCount() { return m_propertyIndexes.size(); } private: StaticPropertyAnalysis(Vector<UnlinkedInstruction, 0, UnsafeVectorOverflow>* instructions, unsigned target) : m_instructions(instructions) , m_target(target) { } Vector<UnlinkedInstruction, 0, UnsafeVectorOverflow>* m_instructions; unsigned m_target; typedef HashSet<unsigned, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> PropertyIndexSet; PropertyIndexSet m_propertyIndexes; }; } // namespace JSC