diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/pic/length_string_object.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/pic/length_string_object.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+//length, string, object
+
+var expected = "3,6,4,3,6,4,3,6,4,3,6,4,";
+var actual = '';
+
+function f() {
+    var ss = [new String("abc"), new String("foobar"), new String("quux")];
+
+    for (var i = 0; i < 12; ++i) {
+        actual += ss[i%3].length + ',';
+    }
+}
+
+f();
+
+assertEq(actual, expected);
+
+
+function g(s) {
+    return new String(s).length;
+}
+
+assertEq(g("x"), 1); // Warm-up
+assertEq(g("x"), 1); // Create IC
+assertEq(g("x"), 1); // Test IC
+
+function h(s) {
+    var x = new String(s);
+    for (var i = 0; i < 100; i++)
+        x[i] = i;
+    return x.length;
+}
+
+assertEq(h("x"), 1);
+assertEq(h("x"), 1);
+assertEq(h("x"), 1);