diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/optimize-globals-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/optimize-globals-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+
+function testNaN(x) {
+    var x = NaN;
+    assertEq(isNaN(x), true);
+}
+testNaN();
+
+function testInfinity(x) {
+    return (x === Infinity);
+}
+assertEq(testInfinity(Infinity), true);
+assertEq(testInfinity(6), false);
+assertEq(testInfinity(-Infinity), false);
+
+function testUndefined(x) {
+    return (x === undefined);
+}
+assertEq(testUndefined(undefined), true);
+assertEq(testUndefined(), true);
+assertEq(testUndefined(5), false);