Add regression tests for issues 728, 732

test/mjsunit/regress/regress-732.js

Index: test/mjsunit/regress/regress-732.js
diff --git a/test/mjsunit/regress/regress-732.js b/test/mjsunit/regress/regress-732.js
new file mode 100644
index 0000000000000000000000000000000000000000..2b02ea637d487a858ef4d6013bce406a00cbc972
--- /dev/null
+++ b/test/mjsunit/regress/regress-732.js
@@ -0,0 +1,46 @@
+// Copyright 2010 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.
+
+// idx is a valid array index but is too big to be cached in hash field.
+var idx = 10000000;
+
+// Create a JSObject with NumberDictionary as a backing store for elements.
+var obj = { };
+for (var i = 0; i < 100000; i += 100) { obj[i] = "obj" + i; }
+
+// Set value using numeric index.
+obj[idx] = "obj" + idx;
+
+// Make a string from index.
+var str = "" + idx;
+
+// Force hash computation for the string representation of index.
+for (var i = 0; i < 10; i++) { ({})[str]; }
+
+// Try getting value back using string and number representations of
+// the same index.
+assertEquals(obj[str], obj[idx])