diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug680619.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug680619.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+function f0() {
+    var v0 = 5000;
+    if (v0) {
+        if (v0) {
+            v0 = v0 * v0;
+        } else {
+            return;
+        }
+        v0 = v0 * v0;
+    }
+    return v0;
+}
+assertEq(f0(), 625000000000000);