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

R=jkummerow@chromium.org
BUG=v8:2568

Review URL: https://chromiumcodereview.appspot.com/12545004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13847 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/code-stubs-x64.cc

@@ -2389,6 +2389,7 @@ void ArrayLengthStub::Generate(MacroAssembler* masm) {
     //  -- rsp[0] : return address
     // -----------------------------------
     __ Cmp(rax, masm->isolate()->factory()->length_string());
+    __ j(not_equal, &miss);
     receiver = rdx;
   } else {
     ASSERT(kind() == Code::LOAD_IC);
@@ -2416,6 +2417,7 @@ void FunctionPrototypeStub::Generate(MacroAssembler* masm) {
     //  -- rsp[0] : return address
     // -----------------------------------
     __ Cmp(rax, masm->isolate()->factory()->prototype_string());
+    __ j(not_equal, &miss);
     receiver = rdx;
   } else {
     ASSERT(kind() == Code::LOAD_IC);
@@ -2443,6 +2445,7 @@ void StringLengthStub::Generate(MacroAssembler* masm) {
     //  -- rsp[0] : return address
     // -----------------------------------
     __ Cmp(rax, masm->isolate()->factory()->length_string());
+    __ j(not_equal, &miss);
     receiver = rdx;
   } else {
     ASSERT(kind() == Code::LOAD_IC);

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.
+
+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'));
+
+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 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'));