diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug769985.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug769985.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+
+/* Make sure ints are converted to doubles as needed at the head of loops which modify those ints. */
+
+function bar() {}
+
+function foo() {
+  var n = 0.5;
+  n -= 0.5;
+  var iters = 0;
+  for (var i = n;; ) {
+    bar();
+    iters++;
+    if (i == 100)
+      break;
+    i = (i + 1) | 0;
+  }
+  assertEq(iters, 101);
+}
+foo();