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diff --git a/Source/JavaScriptCore/b3/B3PCToOriginMap.h b/Source/JavaScriptCore/b3/B3PCToOriginMap.h
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+++ b/Source/JavaScriptCore/b3/B3PCToOriginMap.h
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+/*
+ * Copyright (C) 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. 
+ */
+
+#ifndef B3PCToOriginMap_h
+#define B3PCToOriginMap_h
+
+#if ENABLE(B3_JIT)
+
+#include "B3Origin.h"
+#include "MacroAssembler.h"
+#include <wtf/Vector.h>
+
+namespace JSC { namespace B3 {
+
+class PCToOriginMap {
+    WTF_MAKE_NONCOPYABLE(PCToOriginMap);
+public:
+    PCToOriginMap()
+    { }
+
+    PCToOriginMap(PCToOriginMap&& other)
+        : m_ranges(WTFMove(other.m_ranges))
+    { }
+
+    struct OriginRange {
+        MacroAssembler::Label label;
+        Origin origin;
+    };
+
+    void appendItem(MacroAssembler::Label label, Origin origin)
+    {
+        if (m_ranges.size()) {
+            if (m_ranges.last().label == label)
+                return;
+        }
+
+        m_ranges.append(OriginRange{label, origin});
+    }
+
+    const Vector<OriginRange>& ranges() const  { return m_ranges; }
+
+private:
+    Vector<OriginRange> m_ranges;
+};
+
+} } // namespace JSC::B3
+
+#endif // ENABLE(B3_JIT)
+
+#endif // B3PCToOriginMap_h