Merged r14751, r14753 into trunk branch.

test/mjsunit/regress/regress-copy-hole-to-field.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.
 
 // Flags: --allow-natives-syntax
 
-function f1(a, i) {
-  return a[i] + 0.5;
+// Copy a hole from HOLEY_DOUBLE to double field.
+var a = [1.5,,1.7];
+var o = {a:1.8};
+
+function f1(o,a,i) {
+  o.a = a[i];
 }
-var arr = [0.0,,2.5];
-assertEquals(0.5, f1(arr, 0));
-assertEquals(0.5, f1(arr, 0));
+
+f1(o,a,0);
+f1(o,a,0);
+assertEquals(1.5, o.a);
 %OptimizeFunctionOnNextCall(f1);
-assertEquals(0.5, f1(arr, 0));
-Array.prototype[1] = 1.5;
-assertEquals(2, f1(arr, 1));
+f1(o,a,1);
+assertEquals(undefined, o.a);
+
+// Copy a hole from HOLEY_SMI to smi field.
+var a = [1,,3];
+var o = {ab:5};
+
+function f2(o,a,i) {
+  o.ab = a[i];
+}
+
+f2(o,a,0);
+f2(o,a,0);
+%OptimizeFunctionOnNextCall(f2);
+f2(o,a,1);
+assertEquals(undefined, o.ab);