diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug719774.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug719774.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,30 @@
+Date.prototype.format1 = function() {
+    return "" + this.getMonth() + this.getFullYear();
+}
+function f(d) {
+    for (var i=0; i<60; i++) {
+        assertEq(d.format1(), "91987");
+    }
+}
+f(new Date("10/10/1987 1:11:11"));
+
+var global = 0;
+function f1() {
+    return global++;
+}
+function g1() {
+    return f1() + f1();
+}
+var result = 0;
+for (var i=0; i<100; i++)
+    result += g1();
+assertEq(result, 19900);
+
+function g2() {
+    var a = [];
+    var b = [];
+    a.push(1);
+    return a.length + b.length;
+}
+for (var i=0; i<100; i++)
+    assertEq(g2(), 1);