diff options
Diffstat (limited to 'Source/JavaScriptCore/bytecode/FullBytecodeLiveness.h')
| -rw-r--r-- | Source/JavaScriptCore/bytecode/FullBytecodeLiveness.h | 29 |
1 files changed, 7 insertions, 22 deletions
diff --git a/Source/JavaScriptCore/bytecode/FullBytecodeLiveness.h b/Source/JavaScriptCore/bytecode/FullBytecodeLiveness.h index d34392121..073ce2757 100644 --- a/Source/JavaScriptCore/bytecode/FullBytecodeLiveness.h +++ b/Source/JavaScriptCore/bytecode/FullBytecodeLiveness.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2013 Apple Inc. All rights reserved. + * Copyright (C) 2013, 2015 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -23,8 +23,7 @@ * THE POSSIBILITY OF SUCH DAMAGE. */ -#ifndef FullBytecodeLiveness_h -#define FullBytecodeLiveness_h +#pragma once #include <wtf/FastBitVector.h> @@ -35,36 +34,22 @@ class BytecodeLivenessAnalysis; typedef HashMap<unsigned, FastBitVector, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> BytecodeToBitmapMap; class FullBytecodeLiveness { + WTF_MAKE_FAST_ALLOCATED; 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 + const FastBitVector& getLiveness(unsigned bytecodeIndex) const { - BytecodeToBitmapMap::const_iterator iter = m_map.find(bytecodeIndex); - ASSERT(iter != m_map.end()); - return iter->value; + return m_map[bytecodeIndex]; } 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)); + return operandIsAlwaysLive(operand) || operandThatIsNotAlwaysLiveIsLive(getLiveness(bytecodeIndex), operand); } private: friend class BytecodeLivenessAnalysis; - CodeBlock* m_codeBlock; - BytecodeToBitmapMap m_map; + Vector<FastBitVector, 0, UnsafeVectorOverflow> m_map; }; } // namespace JSC - -#endif // FullBytecodeLiveness_h - |