Add test case for typed arrays slicing

R=rossberg@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10698069

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11962 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/typed-array-slice.js

+// 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
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+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
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+//       with the distribution.
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+//       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,
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+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+// This is a regression test for overlapping key and value registers.
+
+var types = [Array, Int8Array, Uint8Array, Int16Array, Uint16Array,
+             Int32Array, Uint32Array, Uint8ClampedArray, Float32Array,
+             Float64Array];
+
+var results1 = [-2, -2, 254, -2, 65534, -2, 4294967294, 0, -2, -2];
+var results2 = [undefined, -1, 255, -1, 65535, -1, 4294967295, 0, -1, -1];
+var results3 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
+var results4 = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1];
+
+const kElementCount = 40;
+
+function do_slice(a) {
+  return Array.prototype.slice.call(a, 4, 8);
+}
+
+for (var t = 0; t < types.length; t++) {
+  var type = types[t];
+  var a = new type(kElementCount);
+  for (var i = 0; i < kElementCount; ++i ) {
+    a[i] = i-6;
+  }
+  delete a[5];
+  var sliced = do_slice(a);
+
+  %ClearFunctionTypeFeedback(do_slice);
+  assertEquals(results1[t], sliced[0]);
+  assertEquals(results2[t], sliced[1]);
+  assertEquals(results3[t], sliced[2]);
+  assertEquals(results4[t], sliced[3]);
+}