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diff --git a/Source/JavaScriptCore/bytecode/LazyOperandValueProfile.cpp b/Source/JavaScriptCore/bytecode/LazyOperandValueProfile.cpp
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+++ b/Source/JavaScriptCore/bytecode/LazyOperandValueProfile.cpp
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+/*
+ * Copyright (C) 2012 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. 
+ */
+
+#include "config.h"
+#include "LazyOperandValueProfile.h"
+
+#if ENABLE(VALUE_PROFILER)
+
+namespace JSC {
+
+CompressedLazyOperandValueProfileHolder::CompressedLazyOperandValueProfileHolder() { }
+CompressedLazyOperandValueProfileHolder::~CompressedLazyOperandValueProfileHolder() { }
+
+void CompressedLazyOperandValueProfileHolder::computeUpdatedPredictions()
+{
+    if (!m_data)
+        return;
+    
+    for (unsigned i = 0; i < m_data->size(); ++i)
+        m_data->at(i).computeUpdatedPrediction();
+}
+
+LazyOperandValueProfile* CompressedLazyOperandValueProfileHolder::add(
+    const LazyOperandValueProfileKey& key)
+{
+    if (!m_data)
+        m_data = adoptPtr(new LazyOperandValueProfile::List());
+    else {
+        for (unsigned i = 0; i < m_data->size(); ++i) {
+            if (m_data->at(i).key() == key)
+                return &m_data->at(i);
+        }
+    }
+    
+    m_data->append(LazyOperandValueProfile(key));
+    return &m_data->last();
+}
+
+LazyOperandValueProfileParser::LazyOperandValueProfileParser(
+    CompressedLazyOperandValueProfileHolder& holder)
+    : m_holder(holder)
+{
+    if (!m_holder.m_data)
+        return;
+    
+    LazyOperandValueProfile::List& data = *m_holder.m_data;
+    for (unsigned i = 0; i < data.size(); ++i)
+        m_map.add(data[i].key(), &data[i]);
+}
+
+LazyOperandValueProfileParser::~LazyOperandValueProfileParser() { }
+
+LazyOperandValueProfile* LazyOperandValueProfileParser::getIfPresent(
+    const LazyOperandValueProfileKey& key) const
+{
+    HashMap<LazyOperandValueProfileKey, LazyOperandValueProfile*>::const_iterator iter =
+        m_map.find(key);
+    
+    if (iter == m_map.end())
+        return 0;
+    
+    return iter->second;
+}
+
+PredictedType LazyOperandValueProfileParser::prediction(
+    const LazyOperandValueProfileKey& key) const
+{
+    LazyOperandValueProfile* profile = getIfPresent(key);
+    if (!profile)
+        return PredictNone;
+    
+    return profile->computeUpdatedPrediction();
+}
+
+} // namespace JSC
+
+#endif // ENABLE(VALUE_PROFILER)
+