* Added check for HeapNumber in the fast-cast Smi switch.

test/mjsunit/regress/regress-137.js

Index: test/mjsunit/regress/regress-137.js
diff --git a/test/mjsunit/regress/regress-137.js b/test/mjsunit/regress/regress-137.js
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+++ b/test/mjsunit/regress/regress-137.js
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+// 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.
+
+// See <URL:http://code.google.com/p/v8/issues/detail?id=137>
+
+(function () {
+  var strNum = 170;
+  var base = strNum / 16;
+  var rem = strNum % 16;
+  var base = base - (rem / 16);  // base is now HeapNumber with valid Smi value.
+
+  switch(base) {
+    case 10: return "A";  // Expected result.
+    case 11: return "B";
+    case 12: return "C";
+    case 13: return "D";
+    case 14: return "E";
+    case 15: return "F";  // Enough cases to trigger fast-case Smi switch.
+  };
+  fail("case 10", "Default case", "Heap number not recognized as Smi value");
+})();
+