JavaScriptCore-7600.1.4.16.1.tar.gz

[apple/javascriptcore.git] / ftl / FTLValueRange.h

/*
 * Copyright (C) 2014 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 FTLValueRange_h
#define FTLValueRange_h

#if ENABLE(FTL_JIT)

#include "FTLAbbreviatedTypes.h"

namespace JSC { namespace FTL {

class ValueRange {
public:
    ValueRange()
        : m_begin(0)
        , m_end(0)
        , m_rangeMetadata(0)
    {
    }
    
    ValueRange(LValue begin, LValue end)
        : m_begin(begin)
        , m_end(end)
        , m_rangeMetadata(0)
    {
    }
    
    LValue begin() const { return m_begin; }
    LValue end() const { return m_end; }
    
    void decorateInstruction(LContext, LValue loadInstruction, unsigned rangeKind) const;
    
private:
    LValue m_begin;
    LValue m_end;
    mutable LValue m_rangeMetadata;
};

} } // namespace JSC::FTL

#endif // ENABLE(FTL_JIT)

#endif // FTLValueRange_h