/* * 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. AND ITS CONTRIBUTORS ``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 ITS 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. */ #ifndef FullBytecodeLiveness_h #define FullBytecodeLiveness_h #include <wtf/FastBitVector.h> namespace JSC { class BytecodeLivenessAnalysis; typedef HashMap<unsigned, FastBitVector, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> BytecodeToBitmapMap; class FullBytecodeLiveness { public: FullBytecodeLiveness() : m_codeBlock(0) { } // We say "out" to refer to the bitvector that contains raw results for a bytecode // instruction. const FastBitVector& getOut(unsigned bytecodeIndex) const { BytecodeToBitmapMap::const_iterator iter = m_map.find(bytecodeIndex); ASSERT(iter != m_map.end()); return iter->value; } bool operandIsLive(int operand, unsigned bytecodeIndex) const { return operandIsAlwaysLive(m_codeBlock, operand) || operandThatIsNotAlwaysLiveIsLive(m_codeBlock, getOut(bytecodeIndex), operand); } FastBitVector getLiveness(unsigned bytecodeIndex) const { return getLivenessInfo(m_codeBlock, getOut(bytecodeIndex)); } private: friend class BytecodeLivenessAnalysis; CodeBlock* m_codeBlock; BytecodeToBitmapMap m_map; }; } // namespace JSC #endif // FullBytecodeLiveness_h