[x86] Disable invalid checked load/store optimization.

test/mjsunit/compiler/regress-lena.js

Index: test/mjsunit/compiler/regress-lena.js
diff --git a/test/mjsunit/compiler/regress-lena.js b/test/mjsunit/compiler/regress-lena.js
new file mode 100644
index 0000000000000000000000000000000000000000..288e2a44f188f89d53f8986b886629e9692cf413
--- /dev/null
+++ b/test/mjsunit/compiler/regress-lena.js
@@ -0,0 +1,17 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+function module(stdlib, foreign, heap) {
+    "use asm";
+    var MEM32 = new stdlib.Int32Array(heap);
+    function foo(i) {
+      i = i|0;
+      MEM32[0] = i;
+      return MEM32[i + 4 >> 2]|0;
+    }
+    return { foo: foo };
+}
+
+var foo = module(this, {}, new ArrayBuffer(64*1024)).foo;
+assertEquals(-4, foo(-4));