Temporarily disable optimization for StringWrappers to use native valueOf

test/mjsunit/regress/regress-2855.js

Index: test/mjsunit/regress/regress-2855.js
diff --git a/test/mjsunit/regress/regress-2855.js b/test/mjsunit/regress/regress-2855.js
new file mode 100644
index 0000000000000000000000000000000000000000..ac721af73bf4c91ecc751fc31a3db91cf6942c93
--- /dev/null
+++ b/test/mjsunit/regress/regress-2855.js
@@ -0,0 +1,41 @@
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function foo(a) {
+  for (var i = 0; i < 100; ++i)
+    a = new String(a);
+  return a;
+}
+
+var expected = "hello";
+for (var i = 0; i < 4; ++i) {
+  if (i == 2) {
+    String.prototype.valueOf = function() { return 42; }
+    expected = "42";
+  }
+  assertEquals(expected, "" + foo("hello"));
+}