Migrated several tests from blink to V8 repository.

test/webkit/registerCachingAcrossBranchTargets.js

Index: test/webkit/registerCachingAcrossBranchTargets.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/registerCachingAcrossBranchTargets.js
similarity index 73%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/registerCachingAcrossBranchTargets.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..e2e3e7c3a3733dc270edaaa59463cbe256fbb188 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/registerCachingAcrossBranchTargets.js
@@ -22,10 +22,11 @@
 // 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."
+"This test makes sure we don't incorrectly cache virtual registers in system registers across VM branches"
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
-
-
+shouldBeTrue("(true ? function(){ return true; } : a.b)()");
+shouldBeTrue("(function(){ return true; } || a.b)()");
+shouldBeTrue("(function(){ return (true ? function(){return true;} : a.b)(); })()");
+shouldBeTrue("(function(){ return (function(){return true;} || a.b)(); })()");
+shouldBeTrue("(function(){ var i = 0; var result = false; var a = {c:true}.c; do { result = a; i++; } while (i < 2); return result; })()");