diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug724562.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug724562.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+function fannkuch(n) {
+    var perm1 = Array(n);
+    for (var i = 0; i < n; i++) { };
+    var r = n;
+    do {
+        while (r != 1) { r--; }
+        for (var z=0; z<50; z++) {
+            while (i < r) {
+                perm1[i];
+                i++;
+            }
+        }
+    } while(false);
+}
+fannkuch(18);