Migrated several tests from blink to V8 repository.

test/webkit/dfg-int32-to-double-on-set-local-and-exit.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 an Int32ToDouble placed on a SetLocal does a forward exit."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+var counter = 0;
+
+function checkpoint(text) {
+    debug("Checkpoint: " + text);
+    counter++;
+}
+
+function func1() {
+    checkpoint("a");
+    a = Date.now() + Date.now() + Date.now() + Date.now() + Date.now() + Date.now();
+    checkpoint("b");
+}
+function func2() {
+    checkpoint("c");
+    return Date.now() + Date.now() + Date.now() + Date.now() + Date.now() + Date.now();
+}
+
+function func3(s) {
+    checkpoint("1");
+    s = func1(); // The bug is that this function will be called twice, if our Int32ToDouble hoisting does a backward speculation.
+    checkpoint("2");
+    s = func2();
+    checkpoint("3");
+    return s;
+}
+
+function test() {
+    return func3(1);
+}
 
 
+for (var i=0; i < 200; i++) {
+    test();
+}
+
+shouldBe("counter", "1200");