Migrated several tests from blink to V8 repository.

test/webkit/dfg-double-addition-simplify-to-int.js

Index: test/webkit/dfg-double-addition-simplify-to-int.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-double-addition-simplify-to-int.js
similarity index 75%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-double-addition-simplify-to-int.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..3e12b114284a1e4bfd59316c7b768ab1e40b25fd 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-double-addition-simplify-to-int.js
@@ -22,10 +22,28 @@
 // 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 the DFG doesn't get confused about an edge being a double edge after we perform CFG simplification."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
-
+function foo(a, p) {
+    var p2;
+    var x;
+    var y;
+    if (p)
+        p2 = true;
+    else
+        p2 = true;
+    if (p2)
+        x = a;
+    else
+        x = 0.5;
+    if (p2)
+        y = a;
+    else
+        y = 0.7;
+    var result = x + y;
+    return [result, [x, y], [x, y], [x, y]];
+}
 
+for (var i = 0; i < 1000; ++i)
+    shouldBe("foo(42, true)[0]", "84");