Fix Array.length, String.length and Function.prototype LoadICs on x64.

test/mjsunit/regress/regress-2568.js

Index: test/mjsunit/regress/regress-2568.js
diff --git a/test/mjsunit/regress/regress-147497.js b/test/mjsunit/regress/regress-2568.js
similarity index 70%
copy from test/mjsunit/regress/regress-147497.js
copy to test/mjsunit/regress/regress-2568.js
index 92e29d12589984b0cf34a91d7cac3479a04bfbaa..7918e148c483d6f77aadb8b756c7a0eba591b60c 100644
--- a/test/mjsunit/regress/regress-147497.js
+++ b/test/mjsunit/regress/regress-2568.js
@@ -25,21 +25,22 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --expose-debug-as debug
-
-Debug = debug.Debug;
-
-function listener(event, exec_state, event_data, data) {
-  if (event == Debug.DebugEvent.Break) {
-    exec_state.prepareStep(Debug.StepAction.StepNext, 10);
-  }
+function pluck1(a, key) {
+    return a.map(function(item) { return item[key]; });
 };
+assertArrayEquals([2, 2], pluck1([[0, 0], [0, 0]], 'length'));
+assertArrayEquals([1, 3], pluck1([[1, 2], [3, 4]], '0'));
 
-Debug.setListener(listener);
-
-var statement = "";
-for (var i = 0; i < 1024; i++) statement += "z";
-statement = 'with(0)' + statement + '=function foo(){}';
+function pluck2(a, key) {
+    return a.map(function(item) { return item[key]; });
+};
+assertArrayEquals([2, 2], pluck2(["ab", "cd"], 'length'));
+assertArrayEquals(["a", "c"], pluck2(["ab", "cd"], '0'));
 
-debugger;
-eval(statement);
+function pluck3(a, key) {
+    return a.map(function(item) { return item[key]; });
+};
+f = function() { 1 };
+f.prototype = g = function() { 2 };
+assertArrayEquals([g, g], pluck3([f, f], 'prototype'));
+assertArrayEquals([undefined, undefined], pluck3([f, f], '0'));