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 DFGFlushedAt_h 27#define DFGFlushedAt_h 28 29#if ENABLE(DFG_JIT) 30 31#include "DFGFlushFormat.h" 32#include "VirtualRegister.h" 33 34namespace JSC { namespace DFG { 35 36class FlushedAt { 37public: 38 FlushedAt() 39 : m_format(DeadFlush) 40 { 41 } 42 43 explicit FlushedAt(FlushFormat format) 44 : m_format(format) 45 { 46 ASSERT(format == DeadFlush || format == ConflictingFlush); 47 } 48 49 FlushedAt(FlushFormat format, VirtualRegister virtualRegister) 50 : m_format(format) 51 , m_virtualRegister(virtualRegister) 52 { 53 if (format == DeadFlush) 54 ASSERT(!virtualRegister.isValid()); 55 else 56 ASSERT(virtualRegister.isValid()); 57 } 58 59 bool operator!() const { return m_format == DeadFlush; } 60 61 FlushFormat format() const { return m_format; } 62 VirtualRegister virtualRegister() const { return m_virtualRegister; } 63 64 bool operator==(const FlushedAt& other) const 65 { 66 return m_format == other.m_format 67 && m_virtualRegister == other.m_virtualRegister; 68 } 69 70 bool operator!=(const FlushedAt& other) const { return !(*this == other); } 71 72 FlushedAt merge(const FlushedAt& other) const 73 { 74 if (!*this) 75 return other; 76 if (!other) 77 return *this; 78 if (*this == other) 79 return *this; 80 return FlushedAt(ConflictingFlush); 81 } 82 83 void dump(PrintStream&) const; 84 void dumpInContext(PrintStream&, DumpContext*) const; 85 86private: 87 FlushFormat m_format; 88 VirtualRegister m_virtualRegister; 89}; 90 91} } // namespace JSC::DFG 92 93#endif // ENABLE(DFG_JIT) 94 95#endif // DFGFlushedAt_h 96 97