diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testUndemotableBinaryOp.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testUndemotableBinaryOp.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+function testUndemotableBinaryOp() {
+    var out = [];
+    for (let j = 0; j < 5; ++j) { out.push(6 - ((void 0) ^ 0x80000005)); }
+    return out.join(",");
+}
+assertEq(testUndemotableBinaryOp(), "2147483649,2147483649,2147483649,2147483649,2147483649");