Migrated several tests from blink to V8 repository.

test/webkit/dfg-uint32-to-number-in-middle-of-copy-propagation.js

Index: test/webkit/dfg-uint32-to-number-in-middle-of-copy-propagation.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-uint32-to-number-in-middle-of-copy-propagation.js
similarity index 81%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-uint32-to-number-in-middle-of-copy-propagation.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..7705f03df298120e613b30d87935ae97df283ef5 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-uint32-to-number-in-middle-of-copy-propagation.js
@@ -22,10 +22,17 @@
 // 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 UInt32ToNumber and OSR exit are aware of copy propagation and correctly recover both versions of a variable that was subject to a UInt32ToNumber cast."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function foo(b) {
+    var a = b | 0;
+    var x, y;
+    x = a;
+    y = a >>> 0;
+    return [x, y];
+}
 
+for (var i = 0; i < 100; ++i)
+    shouldBe("foo(-1)", "[-1, 4294967295]");