diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug909997.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug909997.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,29 @@
+var wait = 100;
+
+var method_A = function() {
+    for (var t = 0; t < wait; ++t) {}
+}
+
+var method_B = function() {
+    for (var t = 0; t < wait; ++t) {}
+}
+
+var method_C = function() {
+    for (var t = 0; t < wait; ++t) {}
+}
+
+var method_D = function() {
+    for (var t = 0; t < wait; ++t) {}
+}
+
+var func = [method_A, method_B, method_C, method_D]
+
+for (var n = 0; n < 4; ++n) {
+    setJitCompilerOption("baseline.enable", n & 1);
+    setJitCompilerOption("ion.enable", n & 2 ? 1: 0);
+    var opt = getJitCompilerOptions();
+    assertEq(opt["baseline.enable"], n & 1);
+    assertEq(opt["ion.enable"], n & 2 ? 1 : 0);
+    for (var i = 0; i < 1001; ++i)
+        func[n]();
+}
\ No newline at end of file