Source/JavaScriptCore/bytecode/ValueProfile.cpp

/*
 * Copyright (C) 2011 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.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 */

#include "config.h"
#include "ValueProfile.h"

namespace JSC {

#if ENABLE(VALUE_PROFILER)
PredictedType ValueProfile::computeUpdatedPrediction()
{
    for (unsigned i = 0; i < totalNumberOfBuckets; ++i) {
        JSValue value = JSValue::decode(m_buckets[i]);
        if (!value)
            continue;
        
        m_numberOfSamplesInPrediction++;
        mergePrediction(m_prediction, predictionFromValue(value));
        
        m_buckets[i] = JSValue::encode(JSValue());
    }
    
    return m_prediction;
}
#endif // ENABLE(VALUE_PROFILER)

} // namespace JSC