Fix y-umlaut to uppercase.

R=dcarney@chromium.org
BUG=v8:2984

Review URL: https://codereview.chromium.org/59853006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17545 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -4111,13 +4111,12 @@ MaybeObject* Heap::LookupSingleCharacterStringFromCode(uint16_t code) {
     return result;
   }
 
-  Object* result;
+  SeqTwoByteString* result;
   { MaybeObject* maybe_result = AllocateRawTwoByteString(1);
-    if (!maybe_result->ToObject(&result)) return maybe_result;
+    if (!maybe_result->To<SeqTwoByteString>(&result)) return maybe_result;
   }
-  String* answer = String::cast(result);
-  answer->Set(0, code);
-  return answer;
+  result->SeqTwoByteStringSet(0, code);
+  return result;
 }
 
 

src/unicode.h

@@ -235,6 +235,7 @@ struct ConnectorPunctuation {
 };
 struct ToLowercase {
   static const int kMaxWidth = 3;
+  static const bool kIsToLower = true;
   static int Convert(uchar c,
                      uchar n,
                      uchar* result,
@@ -242,6 +243,7 @@ struct ToLowercase {
 };
 struct ToUppercase {
   static const int kMaxWidth = 3;
+  static const bool kIsToLower = false;
   static int Convert(uchar c,
                      uchar n,
                      uchar* result,

test/mjsunit/regress/regress-2984.js

+// 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.
+
+assertEquals("\u0178", "\xff".toUpperCase());
+assertEquals("abcdefghijklmn\xffopq",
+             ("ABCDEFGHIJKL" + "MN\u0178OPQ").toLowerCase());
+assertEquals("\xff", "\u0178".toLowerCase());
+assertEquals("ABCDEFGHIJKLMN\u0178OPQ",
+             ("abcdefghijk" + "lmn\xffopq").toUpperCase());
+