diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testif.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testif.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+function testif() {
+    var q = 0;
+    for (var i = 0; i < 100; i++) {
+        if ((i & 1) == 0)
+            q++;
+        else
+            q--;
+    }
+    return q;
+}
+assertEq(testif(), 0);