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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 FTLForOSREntryJITCode_h
#define FTLForOSREntryJITCode_h
#if ENABLE(FTL_JIT)
#include "FTLJITCode.h"
namespace JSC { namespace FTL {
// OSR entry into the FTL has a number of quirks:
//
// - OSR entry only happens through special OSR entry compilations. They have their
// own CodeBlock and their own JITCode.
//
// - We only OSR enter in loop headers that have a null inline call frame.
//
// - Each OSR entry compilation allows entry through only one bytecode index.
class ForOSREntryJITCode : public FTL::JITCode {
public:
ForOSREntryJITCode();
~ForOSREntryJITCode();
void initializeEntryBuffer(VM&, unsigned numCalleeLocals);
ScratchBuffer* entryBuffer() const { return m_entryBuffer; }
void setBytecodeIndex(unsigned value) { m_bytecodeIndex = value; }
unsigned bytecodeIndex() const { return m_bytecodeIndex; }
void countEntryFailure() { m_entryFailureCount++; }
unsigned entryFailureCount() const { return m_entryFailureCount; }
ForOSREntryJITCode* ftlForOSREntry();
private:
ScratchBuffer* m_entryBuffer; // Only for OSR entry code blocks.
unsigned m_bytecodeIndex;
unsigned m_entryFailureCount;
};
} } // namespace JSC::FTL
#endif // ENABLE(FLT_JIT)
#endif // FTLForOSREntryJITCode_h