1/* 2 * Copyright (C) 2013 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef StaticPropertyAnalysis_h 27#define StaticPropertyAnalysis_h 28 29#include "Executable.h" 30#include "JSGlobalObject.h" 31#include <wtf/HashSet.h> 32 33namespace JSC { 34 35// Reference count indicates number of live registers that alias this object. 36class StaticPropertyAnalysis : public RefCounted<StaticPropertyAnalysis> { 37public: 38 static PassRefPtr<StaticPropertyAnalysis> create(Vector<UnlinkedInstruction, 0, UnsafeVectorOverflow>* instructions, unsigned target) 39 { 40 return adoptRef(new StaticPropertyAnalysis(instructions, target)); 41 } 42 43 void addPropertyIndex(unsigned propertyIndex) { m_propertyIndexes.add(propertyIndex); } 44 45 void record() 46 { 47 (*m_instructions)[m_target] = m_propertyIndexes.size(); 48 } 49 50 int propertyIndexCount() { return m_propertyIndexes.size(); } 51 52private: 53 StaticPropertyAnalysis(Vector<UnlinkedInstruction, 0, UnsafeVectorOverflow>* instructions, unsigned target) 54 : m_instructions(instructions) 55 , m_target(target) 56 { 57 } 58 59 Vector<UnlinkedInstruction, 0, UnsafeVectorOverflow>* m_instructions; 60 unsigned m_target; 61 typedef HashSet<unsigned, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> PropertyIndexSet; 62 PropertyIndexSet m_propertyIndexes; 63}; 64 65} // namespace JSC 66 67#endif // StaticPropertyAnalysis_h 68