Migrated several tests from blink to V8 repository.

test/webkit/dfg-cfg-simplify-redundant-dead-get-local.js

Index: test/webkit/dfg-cfg-simplify-redundant-dead-get-local.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-cfg-simplify-redundant-dead-get-local.js
similarity index 66%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-cfg-simplify-redundant-dead-get-local.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..085af05577af4c3c30fcec5a4eec7a8cf5b547e0 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-cfg-simplify-redundant-dead-get-local.js
@@ -22,10 +22,33 @@
 // 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 if the CFG simplifier gracefully handles the case where Block #1 and #2 are merged, #1 has a dead GetLocal, and #2 has a live GetLocal on the same local."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+var array = [];
 
+var getDist = function () {
+    // a conditional absolutely MUST be here for the whole thing to break.
+    // the return value is irrelevant
 
+    if (false) return "I'm irrelevant!";
+
+    return Math.sqrt(5);
+}
+
+
+var calcError = function(){
+    var dist = 0; // initialisation is necessary for the bug to occur
+
+    true && (dist = getDist());
+
+    array.push(dist);
+}
+
+
+for(var a=0; a<1000; a++){ // the loop needs to be outside calcError, otherwise no bug...
+    calcError();
+}
+
+for (var i = 0; i < array.length; ++i)
+    shouldBe("array[i]", "2.23606797749979");