Migrated several tests from blink to V8 repository.

test/webkit/dfg-arith-add-overflow-check-elimination-tower-of-large-numbers.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 if we have a tower of large numerical constants being added to each other, the DFG knows that a sufficiently large tower may produce a large enough value that overflow check elimination must be careful."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function foo(a, b) {
+    return (a + b + 281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
+            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
+            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
+            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
+            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
+            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
+            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
+            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 + 30) | 0;
+}
 
+function bar(a, b, o) {
+    eval(""); // Prevent this function from being opt compiled.
+    return foo(a, b, o);
+}
 
+var warmup = 200;
+
+for (var i = 0; i < warmup + 1; ++i) {
+    var a, b, c;
+    var expected;
+    if (i < warmup) {
+        a = 1;
+        b = 2;
+        expected = 0;
+    } else {
+        a = 2147483645;
+        b = 2147483644;
+        expected = -10;
+    }
+    shouldBe("bar(" + a + ", " + b + ")", "" + expected);
+}
+