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FTLValueSource.h
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executable file
·92 lines (74 loc) · 2.51 KB
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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 FTLValueSource_h
#define FTLValueSource_h
#include <wtf/Platform.h>
#if ENABLE(FTL_JIT)
#include "DFGNode.h"
#include <wtf/PrintStream.h>
#include <wtf/StdLibExtras.h>
namespace JSC { namespace FTL {
enum ValueSourceKind {
SourceNotSet,
ValueInJSStack,
Int32InJSStack,
DoubleInJSStack,
SourceIsDead,
HaveNode
};
class ValueSource {
public:
ValueSource()
: m_value(SourceNotSet)
{
}
explicit ValueSource(ValueSourceKind kind)
: m_value(kind)
{
}
explicit ValueSource(DFG::Node* node)
: m_value(bitwise_cast<uintptr_t>(node))
{
}
ValueSourceKind kind() const
{
if (m_value < static_cast<uintptr_t>(HaveNode))
return static_cast<ValueSourceKind>(m_value);
return HaveNode;
}
bool operator!() const { return kind() != SourceNotSet; }
DFG::Node* node() const
{
ASSERT(kind() == HaveNode);
return bitwise_cast<DFG::Node*>(m_value);
}
void dump(PrintStream&) const;
void dumpInContext(PrintStream&, DumpContext*) const;
private:
uintptr_t m_value;
};
} } // namespace JSC::FTL
#endif // ENABLE(FTL_JIT)
#endif // FTLValueSource_h