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diff --git a/Source/JavaScriptCore/b3/B3ControlValue.cpp b/Source/JavaScriptCore/b3/B3ControlValue.cpp
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+++ b/Source/JavaScriptCore/b3/B3ControlValue.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 "B3ControlValue.h"
+
+#if ENABLE(B3_JIT)
+
+#include "B3BasicBlock.h"
+
+namespace JSC { namespace B3 {
+
+ControlValue::~ControlValue()
+{
+}
+
+bool ControlValue::replaceSuccessor(BasicBlock* from, BasicBlock* to)
+{
+    bool result = false;
+    for (FrequentedBlock& successor : m_successors) {
+        if (successor.block() == from) {
+            successor.block() = to;
+            result = true;
+
+            // Keep looping because it's valid for a successor to be mentioned multiple times,
+            // like if multiple switch cases have the same target.
+        }
+    }
+    return result;
+}
+
+void ControlValue::convertToJump(BasicBlock* destination)
+{
+    unsigned index = this->index();
+    Origin origin = this->origin();
+    BasicBlock* owner = this->owner;
+
+    this->~ControlValue();
+
+    new (this) ControlValue(Jump, origin, FrequentedBlock(destination));
+
+    this->owner = owner;
+    this->m_index = index;
+}
+
+void ControlValue::convertToOops()
+{
+    unsigned index = this->index();
+    Origin origin = this->origin();
+    BasicBlock* owner = this->owner;
+
+    this->~ControlValue();
+
+    new (this) ControlValue(Oops, origin);
+
+    this->owner = owner;
+    this->m_index = index;
+}
+
+void ControlValue::dumpMeta(CommaPrinter& comma, PrintStream& out) const
+{
+    for (FrequentedBlock successor : m_successors)
+        out.print(comma, successor);
+}
+
+Value* ControlValue::cloneImpl() const
+{
+    return new ControlValue(*this);
+}
+
+} } // namespace JSC::B3
+
+#endif // ENABLE(B3_JIT)