diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug677455.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug677455.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+function f0(p0) {
+    var v0 = 0;
+    var v1;
+    var v2;
+    if (v1)
+        v2 = v1 + v1;
+    v1 | v2;
+    if (v0) {
+        while (p0)
+            v2 = v1 + v2;
+        v2 = v0;
+    }
+}
+assertEq(f0(1), undefined);