From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 .../jit-test/tests/basic/mutable-proto-teleporting.js  | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 js/src/jit-test/tests/basic/mutable-proto-teleporting.js

(limited to 'js/src/jit-test/tests/basic/mutable-proto-teleporting.js')

diff --git a/js/src/jit-test/tests/basic/mutable-proto-teleporting.js b/js/src/jit-test/tests/basic/mutable-proto-teleporting.js
new file mode 100644
index 000000000..a52faf1c5
--- /dev/null
+++ b/js/src/jit-test/tests/basic/mutable-proto-teleporting.js
@@ -0,0 +1,18 @@
+// The teleporting optimization should work correctly
+// when we modify an object's proto.
+
+var A = {x: 1};
+var B = Object.create(A);
+
+var C = {};
+C.__proto__ = B;
+
+function f() {
+    for (var i=0; i<25; i++) {
+        assertEq(C.x, (i <= 20) ? 1 : 3);
+        if (i === 20) {
+            B.x = 3;
+        }
+    }
+}
+f();
-- 
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