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diff --git a/js/src/jsscriptinlines.h b/js/src/jsscriptinlines.h
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sw=4 et tw=79 ft=cpp:
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is SpiderMonkey JavaScript engine.
+ *
+ * The Initial Developer of the Original Code is
+ * Mozilla Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2009
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Jason Orendorff <jorendorff@mozilla.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef jsscriptinlines_h___
+#define jsscriptinlines_h___
+
+#include "jscntxt.h"
+#include "jsfun.h"
+#include "jsopcode.h"
+#include "jsregexp.h"
+#include "jsscript.h"
+#include "jsscope.h"
+
+namespace js {
+
+inline
+Bindings::Bindings(JSContext *cx)
+  : lastBinding(cx->compartment->emptyCallShape), nargs(0), nvars(0), nupvars(0)
+{
+}
+
+inline void
+Bindings::transfer(JSContext *cx, Bindings *bindings)
+{
+    JS_ASSERT(lastBinding == cx->compartment->emptyCallShape);
+
+    *this = *bindings;
+#ifdef DEBUG
+    bindings->lastBinding = NULL;
+#endif
+
+    /* Preserve back-pointer invariants across the lastBinding transfer. */
+    if (lastBinding->inDictionary())
+        lastBinding->listp = &this->lastBinding;
+}
+
+inline void
+Bindings::clone(JSContext *cx, Bindings *bindings)
+{
+    JS_ASSERT(lastBinding == cx->compartment->emptyCallShape);
+
+    /*
+     * Non-dictionary bindings are fine to share, as are dictionary bindings if
+     * they're copy-on-modification.
+     */
+    JS_ASSERT(!bindings->lastBinding->inDictionary() || bindings->lastBinding->frozen());
+
+    *this = *bindings;
+}
+
+const Shape *
+Bindings::lastShape() const
+{
+    JS_ASSERT(lastBinding);
+    JS_ASSERT_IF(lastBinding->inDictionary(), lastBinding->frozen());
+    return lastBinding;
+}
+
+} // namespace js
+
+inline JSFunction *
+JSScript::getFunction(size_t index)
+{
+    JSObject *funobj = getObject(index);
+    JS_ASSERT(funobj->isFunction());
+    JS_ASSERT(funobj == (JSObject *) funobj->getPrivate());
+    JSFunction *fun = (JSFunction *) funobj;
+    JS_ASSERT(FUN_INTERPRETED(fun));
+    return fun;
+}
+
+inline JSObject *
+JSScript::getRegExp(size_t index)
+{
+    JSObjectArray *arr = regexps();
+    JS_ASSERT((uint32) index < arr->length);
+    JSObject *obj = arr->vector[index];
+    JS_ASSERT(obj->getClass() == &js_RegExpClass);
+    return obj;
+}
+
+inline bool
+JSScript::isEmpty() const
+{
+    if (length > 3)
+        return false;
+
+    jsbytecode *pc = code;
+    if (noScriptRval && JSOp(*pc) == JSOP_FALSE)
+        ++pc;
+    return JSOp(*pc) == JSOP_STOP;
+}
+
+#endif /* jsscriptinlines_h___ */