Migrated several tests from blink to V8 repository.

test/webkit/dfg-arith-add-overflow-check-elimination-predicted-but-not-proven-int.js

Index: test/webkit/dfg-arith-add-overflow-check-elimination-predicted-but-not-proven-int.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-arith-add-overflow-check-elimination-predicted-but-not-proven-int.js
similarity index 52%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-arith-add-overflow-check-elimination-predicted-but-not-proven-int.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..54c049f1c2db335aad3db86eddce8545b37f26ec 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-arith-add-overflow-check-elimination-predicted-but-not-proven-int.js
@@ -22,10 +22,46 @@
 // 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 when values predicted but not proven int are used in a tower of additions, we don't eliminate the overflow check unsoundly."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+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);
+}