WebKit/Source/JavaScriptCore/ftl/FTLForOSREntryJITCode.h at main · WebKit/WebKit · GitHub

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* Redistribution and use in source and binary forms, with or without

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* 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

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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

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#pragma once

#if ENABLE(FTL_JIT)

#include "FTLJITCode.h"

#include <wtf/FixedVector.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 final : public FTL::JITCode {

public:

ForOSREntryJITCode();

~ForOSREntryJITCode() final;

void initializeEntryBuffer(VM&, unsigned numCalleeLocals);

ScratchBuffer* entryBuffer() const { return m_entryBuffer; }

void setBytecodeIndex(BytecodeIndex value) { m_bytecodeIndex = value; }

BytecodeIndex bytecodeIndex() const { return m_bytecodeIndex; }

void countEntryFailure() { m_entryFailureCount++; }

unsigned entryFailureCount() const { return m_entryFailureCount; }

ForOSREntryJITCode* ftlForOSREntry() final;

void setArgumentFlushFormats(FixedVector<DFG::FlushFormat>&& argumentFlushFormats)

{

m_argumentFlushFormats = WTF::move(argumentFlushFormats);

}

const FixedVector<DFG::FlushFormat>& argumentFlushFormats() LIFETIME_BOUND { return m_argumentFlushFormats; }

private:

FixedVector<DFG::FlushFormat> m_argumentFlushFormats;

ScratchBuffer* m_entryBuffer; // Only for OSR entry code blocks.

BytecodeIndex m_bytecodeIndex;

unsigned m_entryFailureCount;

};

} } // namespace JSC::FTL

#endif // ENABLE(FTL_JIT)

WebKit/Source/JavaScriptCore/ftl/FTLForOSREntryJITCode.h at main · WebKit/WebKit · GitHub

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