Migrated several tests from blink to V8 repository.

test/webkit/dfg-array-pop-side-effects.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 // 1.  Redistributions of source code must retain the above copyright
 //     notice, this list of conditions and the following disclaimer.
 // 2.  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.
 //
 // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
 
 description(
-"Tests the behavior of Array.prototype.concat while the array is having a bad time due to one of the elements we are concatenating."
+"Tests that ArrayPop is known to the DFG to be a side effect."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function foo(a, b) {
+    var result = a.f;
+    result += b.pop();
+    result += a.g;
+    return result;
+}
 
+var ouches = 0;
+for (var i = 0; i < 200; ++i) {
+    var a = {f:1, g:2};
+    var b = [];
+    var expected;
+    if (i < 150) {
+        // Ensure that we always transition the array's structure to one that indicates
+        // that we have array storage.
+        b.__defineGetter__("0", function() {
+            testFailed("Should never get here");
+        });
+        b.length = 0;
+        b[0] = 42;
+        expected = "45";
+    } else {
+        b.__defineGetter__("0", function() {
+            debug("Ouch!");
+            ouches++;
+            delete a.g;
+            a.h = 43;
+            return 5;
+        });
+        expected = "0/0";
+    }
+    shouldBe("foo(a, b)", expected);
+}
 
+shouldBe("ouches", "50");