Implement core support for FixedDoubleArrays.

test/mjsunit/unbox-double-arrays.js

Index: test/mjsunit/unbox-double-arrays.js
diff --git a/test/mjsunit/unbox-double-arrays.js b/test/mjsunit/unbox-double-arrays.js
new file mode 100644
index 0000000000000000000000000000000000000000..a47ab020e6c200c51ae8c96cc1729f09659dc0f7
--- /dev/null
+++ b/test/mjsunit/unbox-double-arrays.js
@@ -0,0 +1,45 @@
+// Copyright 2011 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.
+
+var foo = new Array(500000);
+
+function func(a) {
+  for (var i= 0; i < 100000; ++i ) {
+    a[i] = i+.5;

[Mads Ager (chromium), 2011/06/06 07:58:23]

i + 0.5; ?

[danno, 2011/06/08 12:09:43]

Done.

+  }
+}
+
+func(foo);
+
+for (var i= 0; i < 100000; ++i ) {
+  assertEquals(i+.5, foo[i]);

[Mads Ager (chromium), 2011/06/06 07:58:23]

Ditto.

[danno, 2011/06/08 12:09:43]

Done.

+}
+
+delete foo[5];
+assertEquals(undefined, foo[5])
+assertEquals(undefined, foo[500000-1])
+assertEquals(undefined, foo[-1])