diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testLogicalNotNaN.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testLogicalNotNaN.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+function testLogicalNotNaN() {
+    var i = 0;
+    var a = new Array(5);
+    while (i < a.length)
+        a[i++] = !NaN;
+    return a.join();
+}
+assertEq(testLogicalNotNaN(), "true,true,true,true,true");