Moved regexp-tests that fail on JSCRE to separate file, and made it PASS || FAIL.

test/mjsunit/regexp-UC16.js

+// Copyright 2008 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.
+
+// UC16
+// Characters used:
+// "\u03a3\u03c2\u03c3\u039b\u03bb" - Sigma, final sigma, sigma, Lambda, lamda
+assertEquals("x\u03a3\u03c3x,\u03a3",
+              String(/x(.)\1x/i.exec("x\u03a3\u03c3x")), "backref-UC16");
+assertFalse(/x(...)\1/i.test("x\u03a3\u03c2\u03c3\u03c2\u03c3"),
+            "\\1 ASCII, string short");
+assertTrue(/\u03a3((?:))\1\1x/i.test("\u03c2x"), "backref-UC16-empty");
+assertTrue(/x(?:...|(...))\1x/i.test("x\u03a3\u03c2\u03c3x"),
+           "backref-UC16-uncaptured");
+assertTrue(/x(?:...|(...))\1x/i.test("x\u03c2\u03c3\u039b\u03a3\u03c2\u03bbx"),
+           "backref-UC16-backtrack");
+var longUC16String = "x\u03a3\u03c2\u039b\u03c2\u03c3\u03bb\u03c3\u03a3\u03bb";
+assertEquals(longUC16String + "," + longUC16String.substring(1,4),
+             String(/x(...)\1\1/i.exec(longUC16String)),
+             "backref-UC16-twice");