diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/getelem-sanity-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/getelem-sanity-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+var obj = {firstAttr: 'value', secondAttr: 'another value'};
+
+(function() {
+    for (var i = 0; i < 12; ++i) {
+        var name;
+        if (i < 4)
+            name = 'firstAttr';
+        else if (i < 8)
+            name = 'secondAttr';
+        else
+            name = 'firstAttr';
+
+        var result = obj[name];
+
+        switch (name) {
+          case 'firstAttr': assertEq(result, 'value'); break;
+          case 'secondAttr': assertEq(result, 'another value'); break;
+        }
+    }
+})();
+
+/* Toggle lookup between two ids. */