mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
/*
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* Copyright (C) 2013 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(DFG_JIT)
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#include "DFGFlushFormat.h"
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#include "VirtualRegister.h"
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namespace JSC { namespace DFG {
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class FlushedAt {
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public:
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FlushedAt()
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: m_format(DeadFlush)
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{
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}
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explicit FlushedAt(FlushFormat format)
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: m_format(format)
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{
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ASSERT(format == DeadFlush || format == ConflictingFlush);
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}
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FlushedAt(FlushFormat format, VirtualRegister virtualRegister)
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: m_format(format)
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, m_virtualRegister(virtualRegister)
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{
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if (format == DeadFlush)
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ASSERT(!virtualRegister.isValid());
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}
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bool operator!() const { return m_format == DeadFlush; }
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FlushFormat format() const { return m_format; }
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VirtualRegister virtualRegister() const { return m_virtualRegister; }
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bool operator==(const FlushedAt& other) const
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{
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return m_format == other.m_format
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&& m_virtualRegister == other.m_virtualRegister;
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}
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bool operator!=(const FlushedAt& other) const { return !(*this == other); }
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FlushedAt merge(const FlushedAt& other) const
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{
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if (!*this)
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return other;
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if (!other)
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return *this;
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if (*this == other)
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return *this;
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return FlushedAt(ConflictingFlush);
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}
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void dump(PrintStream&) const;
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void dumpInContext(PrintStream&, DumpContext*) const;
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private:
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FlushFormat m_format;
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VirtualRegister m_virtualRegister;
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};
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} } // namespace JSC::DFG
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#endif // ENABLE(DFG_JIT)
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