diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug764432.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug764432.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+function test() {
+    for (var i=0; i<100000; i++) {
+        var a = -0x80000000;
+        assertEq(a >>> 32, 2147483648);
+    }
+}
+test();