From 6882a04fb36642862b11efe514251d32070c3d65 Mon Sep 17 00:00:00 2001 From: Konstantin Tokarev Date: Thu, 25 Aug 2016 19:20:41 +0300 Subject: Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443) Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f Reviewed-by: Konstantin Tokarev --- .../bytecode/BytecodeLivenessAnalysis.h | 69 ++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 Source/JavaScriptCore/bytecode/BytecodeLivenessAnalysis.h (limited to 'Source/JavaScriptCore/bytecode/BytecodeLivenessAnalysis.h') diff --git a/Source/JavaScriptCore/bytecode/BytecodeLivenessAnalysis.h b/Source/JavaScriptCore/bytecode/BytecodeLivenessAnalysis.h new file mode 100644 index 000000000..ece16f21f --- /dev/null +++ b/Source/JavaScriptCore/bytecode/BytecodeLivenessAnalysis.h @@ -0,0 +1,69 @@ +/* + * 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 + * 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 BytecodeLivenessAnalysis_h +#define BytecodeLivenessAnalysis_h + +#include "BytecodeBasicBlock.h" +#include +#include +#include + +namespace JSC { + +class BytecodeKills; +class CodeBlock; +class FullBytecodeLiveness; + +class BytecodeLivenessAnalysis { + WTF_MAKE_FAST_ALLOCATED; + WTF_MAKE_NONCOPYABLE(BytecodeLivenessAnalysis); +public: + BytecodeLivenessAnalysis(CodeBlock*); + + bool operandIsLiveAtBytecodeOffset(int operand, unsigned bytecodeOffset); + FastBitVector getLivenessInfoAtBytecodeOffset(unsigned bytecodeOffset); + + void computeFullLiveness(FullBytecodeLiveness& result); + void computeKills(BytecodeKills& result); + +private: + void compute(); + void runLivenessFixpoint(); + void dumpResults(); + + void getLivenessInfoAtBytecodeOffset(unsigned bytecodeOffset, FastBitVector&); + + CodeBlock* m_codeBlock; + Vector> m_basicBlocks; +}; + +inline bool operandIsAlwaysLive(int operand); +inline bool operandThatIsNotAlwaysLiveIsLive(const FastBitVector& out, int operand); +inline bool operandIsLive(const FastBitVector& out, int operand); + +} // namespace JSC + +#endif // BytecodeLivenessAnalysis_h -- cgit v1.2.1