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/*
* Copyright (C) 2012-2017 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.
*/
#pragma once
#if ENABLE(DFG_JIT)
#include "DFGMinifiedGraph.h"
#include "DFGVariableEvent.h"
#include "Operands.h"
#include "ValueRecovery.h"
#include <wtf/Vector.h>
namespace JSC { namespace DFG {
struct UndefinedOperandSpan {
unsigned firstIndex;
int minOffset;
unsigned numberOfRegisters;
};
class VariableEventStream {
public:
VariableEventStream() = default;
VariableEventStream(Vector<VariableEvent>&& stream)
: m_stream(WTFMove(stream))
{
}
unsigned reconstruct(CodeBlock*, CodeOrigin, MinifiedGraph&, unsigned index, Operands<ValueRecovery>&) const;
unsigned reconstruct(CodeBlock*, CodeOrigin, MinifiedGraph&, unsigned index, Operands<ValueRecovery>&, Vector<UndefinedOperandSpan>*) const;
private:
enum class ReconstructionStyle {
Combined,
Separated
};
template<ReconstructionStyle style>
unsigned reconstruct(
CodeBlock*, CodeOrigin, MinifiedGraph&,
unsigned index, Operands<ValueRecovery>&, Vector<UndefinedOperandSpan>*) const;
FixedVector<VariableEvent> m_stream;
};
class VariableEventStreamBuilder {
WTF_MAKE_NONCOPYABLE(VariableEventStreamBuilder);
public:
static constexpr bool verbose = false;
VariableEventStreamBuilder() = default;
void appendAndLog(const VariableEvent& event)
{
if (verbose)
logEvent(event);
m_stream.append(event);
}
unsigned size() const { return m_stream.size(); }
Vector<VariableEvent> finalize() { return WTFMove(m_stream); }
private:
void logEvent(const VariableEvent&);
Vector<VariableEvent> m_stream;
};
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
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