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test/mjsunit/unbox-smi-field.js

Index: test/mjsunit/unbox-smi-field.js
diff --git a/test/mjsunit/unbox-smi-field.js b/test/mjsunit/unbox-smi-field.js
new file mode 100644
index 0000000000000000000000000000000000000000..361911800b2b133c790f3c7a9ea118f90779b36b
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+++ b/test/mjsunit/unbox-smi-field.js
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+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+function Foo(x) {
+  this.x = x;
+}
+
+var f = new Foo(1);
+var g = new Foo(2);
+
+function add(a, b) {
+  return a.x + b.x;
+}
+
+assertEquals(3, add(f, g));
+assertEquals(3, add(g, f));
+%OptimizeFunctionOnNextCall(add);
+assertEquals(3, add(f, g));
+assertEquals(3, add(g, f));