mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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70 lines
2.6 KiB
C++
70 lines
2.6 KiB
C++
/*
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* Copyright (C) 2013 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(FTL_JIT)
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#include "FTLJITCode.h"
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namespace JSC { namespace FTL {
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// OSR entry into the FTL has a number of quirks:
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//
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// - OSR entry only happens through special OSR entry compilations. They have their
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// own CodeBlock and their own JITCode.
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//
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// - We only OSR enter in loop headers that have a null inline call frame.
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//
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// - Each OSR entry compilation allows entry through only one bytecode index.
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class ForOSREntryJITCode final : public FTL::JITCode {
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public:
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ForOSREntryJITCode();
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~ForOSREntryJITCode() final;
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void initializeEntryBuffer(VM&, unsigned numCalleeLocals);
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ScratchBuffer* entryBuffer() const { return m_entryBuffer; }
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void setBytecodeIndex(BytecodeIndex value) { m_bytecodeIndex = value; }
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BytecodeIndex bytecodeIndex() const { return m_bytecodeIndex; }
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void countEntryFailure() { m_entryFailureCount++; }
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unsigned entryFailureCount() const { return m_entryFailureCount; }
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ForOSREntryJITCode* ftlForOSREntry() final;
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Vector<DFG::FlushFormat>& argumentFlushFormats() { return m_argumentFlushFormats; }
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private:
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Vector<DFG::FlushFormat> m_argumentFlushFormats;
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ScratchBuffer* m_entryBuffer; // Only for OSR entry code blocks.
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BytecodeIndex m_bytecodeIndex;
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unsigned m_entryFailureCount;
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};
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} } // namespace JSC::FTL
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#endif // ENABLE(FTL_JIT)
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