v8: upgrade to v3.20.2

1 files changed, 67 insertions, 0 deletions

diff --git a/deps/v8/test/webkit/dfg-arith-add-overflow-check-elimination-predicted-but-not-proven-int.js b/deps/v8/test/webkit/dfg-arith-add-overflow-check-elimination-predicted-but-not-proven-int.js
new file mode 100644
index 0000000000..54c049f1c2
--- /dev/null
+++ b/deps/v8/test/webkit/dfg-arith-add-overflow-check-elimination-predicted-but-not-proven-int.js
@@ -0,0 +1,67 @@
+// 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 that when values predicted but not proven int are used in a tower of additions, we don't eliminate the overflow check unsoundly."
+);
+
+function foo(a, b, o) {
+    return (a + b + o.f) | 0;
+}
+
+function bar(a, b, o) {
+    eval(""); // Prevent this function from being opt compiled.
+    return foo(a, b, o);
+}
+
+var badCases = [
+    {a:2147483645, b:2147483644, c:9007199254740990, expected:-8},
+    {a:2147483643, b:2147483643, c:18014398509481980, expected:-16},
+    {a:2147483643, b:2147483642, c:36028797018963960, expected:-16},
+    {a:2147483642, b:2147483642, c:36028797018963960, expected:-16},
+    {a:2147483641, b:2147483640, c:144115188075855840, expected:-32},
+    {a:2147483640, b:2147483640, c:144115188075855840, expected:-64},
+    {a:2147483640, b:2147483639, c:288230376151711680, expected:-64},
+    {a:2147483639, b:2147483639, c:288230376151711680, expected:-64}
+];
+
+var warmup = 100;
+
+for (var i = 0; i < warmup + badCases.length; ++i) {
+    var a, b, c;
+    var expected;
+    if (i < warmup) {
+        a = 1;
+        b = 2;
+        c = 3;
+        expected = 6;
+    } else {
+        var current = badCases[i - warmup];
+        a = current.a;
+        b = current.b;
+        c = current.c;
+        expected = current.expected;
+    }
+    shouldBe("bar(" + a + ", " + b + ", {f:" + c + "})", "" + expected);
+}
+