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diff --git a/Source/JavaScriptCore/b3/B3PatchpointValue.h b/Source/JavaScriptCore/b3/B3PatchpointValue.h
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+++ b/Source/JavaScriptCore/b3/B3PatchpointValue.h
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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. 
+ */
+
+#pragma once
+
+#if ENABLE(B3_JIT)
+
+#include "B3Effects.h"
+#include "B3StackmapValue.h"
+#include "B3Value.h"
+
+namespace JSC { namespace B3 {
+
+class PatchpointValue : public StackmapValue {
+public:
+    typedef StackmapValue Base;
+    
+    static bool accepts(Kind kind) { return kind == Patchpoint; }
+
+    ~PatchpointValue();
+
+    // The effects of the patchpoint. This defaults to Effects::forCall(), but you can set it to anything.
+    //
+    // If there are no effects, B3 is free to assume any use of this PatchpointValue can be replaced with
+    // a use of a different PatchpointValue, so long as the other one also has no effects and has the
+    // same children. Note that this comparison ignores child constraints, the result constraint, and all
+    // other StackmapValue meta-data. If there are read effects but not write effects, then this same sort
+    // of substitution could be made so long as there are no interfering writes.
+    Effects effects;
+
+    // The input representation (i.e. constraint) of the return value. This defaults to WarmAny if the
+    // type is Void and it defaults to SomeRegister otherwise. It's illegal to mess with this if the type
+    // is Void. Otherwise you can set this to any input constraint.
+    ValueRep resultConstraint;
+
+    // The number of scratch registers that this patchpoint gets. The scratch register is guaranteed
+    // to be different from any input register and the destination register. It's also guaranteed not
+    // to be clobbered either early or late. These are 0 by default.
+    uint8_t numGPScratchRegisters { 0 };
+    uint8_t numFPScratchRegisters { 0 };
+
+protected:
+    void dumpMeta(CommaPrinter&, PrintStream&) const override;
+
+    Value* cloneImpl() const override;
+
+private:
+    friend class Procedure;
+
+    JS_EXPORT_PRIVATE PatchpointValue(Type, Origin);
+};
+
+} } // namespace JSC::B3
+
+#endif // ENABLE(B3_JIT)