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diff --git a/Source/JavaScriptCore/bytecode/MethodOfGettingAValueProfile.cpp b/Source/JavaScriptCore/bytecode/MethodOfGettingAValueProfile.cpp
new file mode 100644
index 000000000..857ed9c87
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+++ b/Source/JavaScriptCore/bytecode/MethodOfGettingAValueProfile.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 "MethodOfGettingAValueProfile.h"
+
+#if ENABLE(DFG_JIT)
+
+#include "CodeBlock.h"
+
+namespace JSC {
+
+MethodOfGettingAValueProfile MethodOfGettingAValueProfile::fromLazyOperand(
+    CodeBlock* codeBlock, const LazyOperandValueProfileKey& key)
+{
+    MethodOfGettingAValueProfile result;
+    result.m_kind = LazyOperand;
+    result.u.lazyOperand.codeBlock = codeBlock;
+    result.u.lazyOperand.bytecodeOffset = key.bytecodeOffset();
+    result.u.lazyOperand.operand = key.operand();
+    return result;
+}
+
+EncodedJSValue* MethodOfGettingAValueProfile::getSpecFailBucket(unsigned index) const
+{
+    switch (m_kind) {
+    case None:
+        return 0;
+        
+    case Ready:
+        return u.profile->specFailBucket(index);
+        
+    case LazyOperand:
+        return u.lazyOperand.codeBlock->lazyOperandValueProfiles().add(
+            LazyOperandValueProfileKey(
+                u.lazyOperand.bytecodeOffset, u.lazyOperand.operand))->specFailBucket(index);
+        
+    default:
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+}
+
+} // namespace JSC
+
+#endif // ENABLE(DFG_JIT)
+