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/*
* 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. ``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
* 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 DFGFlushedAt_h
#define DFGFlushedAt_h
#if ENABLE(DFG_JIT)
#include "DFGFlushFormat.h"
#include "VirtualRegister.h"
namespace JSC { namespace DFG {
class FlushedAt {
public:
FlushedAt()
: m_format(DeadFlush)
{
}
explicit FlushedAt(FlushFormat format)
: m_format(format)
{
ASSERT(format == DeadFlush || format == ConflictingFlush);
}
FlushedAt(FlushFormat format, VirtualRegister virtualRegister)
: m_format(format)
, m_virtualRegister(virtualRegister)
{
if (format == DeadFlush)
ASSERT(!virtualRegister.isValid());
}
bool operator!() const { return m_format == DeadFlush; }
FlushFormat format() const { return m_format; }
VirtualRegister virtualRegister() const { return m_virtualRegister; }
bool operator==(const FlushedAt& other) const
{
return m_format == other.m_format
&& m_virtualRegister == other.m_virtualRegister;
}
bool operator!=(const FlushedAt& other) const { return !(*this == other); }
FlushedAt merge(const FlushedAt& other) const
{
if (!*this)
return other;
if (!other)
return *this;
if (*this == other)
return *this;
return FlushedAt(ConflictingFlush);
}
void dump(PrintStream&) const;
void dumpInContext(PrintStream&, DumpContext*) const;
private:
FlushFormat m_format;
VirtualRegister m_virtualRegister;
};
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
#endif // DFGFlushedAt_h
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