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diff --git a/Source/JavaScriptCore/b3/B3SwitchValue.cpp b/Source/JavaScriptCore/b3/B3SwitchValue.cpp
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+++ b/Source/JavaScriptCore/b3/B3SwitchValue.cpp
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+/*
+ * Copyright (C) 2015-2016 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 "B3SwitchValue.h"
+
+#if ENABLE(B3_JIT)
+
+#include "B3BasicBlock.h"
+#include <wtf/ListDump.h>
+
+namespace JSC { namespace B3 {
+
+SwitchValue::~SwitchValue()
+{
+}
+
+SwitchCase SwitchValue::removeCase(unsigned index)
+{
+    FrequentedBlock resultBlock = m_successors[index];
+    int64_t resultValue = m_values[index];
+    m_successors[index] = m_successors.last();
+    m_successors.removeLast();
+    m_values[index] = m_values.last();
+    m_values.removeLast();
+    return SwitchCase(resultValue, resultBlock);
+}
+
+void SwitchValue::appendCase(const SwitchCase& switchCase)
+{
+    m_successors.append(m_successors.last());
+    m_successors[m_successors.size() - 2] = switchCase.target();
+    m_values.append(switchCase.caseValue());
+}
+
+void SwitchValue::dumpMeta(CommaPrinter& comma, PrintStream& out) const
+{
+    // This destructively overrides ControlValue's dumpMeta().
+    for (SwitchCase switchCase : *this)
+        out.print(comma, switchCase);
+    out.print(comma, "fallThrough = ", fallThrough());
+}
+
+Value* SwitchValue::cloneImpl() const
+{
+    return new SwitchValue(*this);
+}
+
+SwitchValue::SwitchValue(Origin origin, Value* child, const FrequentedBlock& fallThrough)
+    : ControlValue(Switch, Void, origin, child)
+{
+    m_successors.append(fallThrough);
+}
+
+} } // namespace JSC::B3
+
+#endif // ENABLE(B3_JIT)