1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/object-is-polymorphic.js b/js/src/jit-test/tests/basic/object-is-polymorphic.js
new file mode 100644
index 0000000000..137c710c15
--- /dev/null
+++ b/js/src/jit-test/tests/basic/object-is-polymorphic.js
@@ -0,0 +1,20 @@
+function foo(arr) {
+  var result = 0;
+  for (var i = 0; i < arr.length; i++) {
+    for (var j = 0; j < arr.length; j++) {
+      if (Object.is(arr[i], arr[j])) {
+        result++;
+      }
+    }
+  }
+  return result;
+}
+
+var input = [1,"one",{x:1},
+	     1,"one",{x:1}];
+
+var sum = 0;
+for (var i = 0; i < 100; i++) {
+  sum += foo(input);
+}
+assertEq(sum, 1000);