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

test/mjsunit/regress/regress-2568.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (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
+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 = debug.Debug;
+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'));
 
-function listener(event, exec_state, event_data, data) {
-  if (event == Debug.DebugEvent.Break) {
-    exec_state.prepareStep(Debug.StepAction.StepNext, 10);
-  }
+function pluck3(a, key) {
+    return a.map(function(item) { return item[key]; });
 };
-
-Debug.setListener(listener);
-
-var statement = "";
-for (var i = 0; i < 1024; i++) statement += "z";
-statement = 'with(0)' + statement + '=function foo(){}';
-
-debugger;
-eval(statement);
+f = function() { 1 };
+f.prototype = g = function() { 2 };
+assertArrayEquals([g, g], pluck3([f, f], 'prototype'));
+assertArrayEquals([undefined, undefined], pluck3([f, f], '0'));