diff -r 000000000000 -r 6474c204b198 js/src/jit-test/lib/eqArrayHelper.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/lib/eqArrayHelper.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function assertEqArray(actual, expected) {
+    if (actual.length != expected.length) {
+        throw new Error(
+            "array lengths not equal: got " +
+            uneval(actual) + ", expected " + uneval(expected));
+    }
+
+    for (var i = 0; i < actual.length; ++i) {
+        if (actual[i] != expected[i]) {
+        throw new Error(
+            "arrays not equal at element " + i + ": got " +
+            uneval(actual) + ", expected " + uneval(expected));
+        }
+    }
+}
+
+