Fix PrepareKeyedOperand on arm.

test/mjsunit/regress/regress-358057.js

Index: test/mjsunit/regress/regress-358057.js
diff --git a/test/mjsunit/regress/regress-358057.js b/test/mjsunit/regress/regress-358057.js
new file mode 100644
index 0000000000000000000000000000000000000000..c5fe73a032cfb911b6ff2eb24436f1982ea6ff3f
--- /dev/null
+++ b/test/mjsunit/regress/regress-358057.js
@@ -0,0 +1,19 @@
+// 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.
+
+// Flags: --allow-natives-syntax
+__v_0 = new Uint8ClampedArray(10);
+for (var i = 0; i < 10; i++) {
+  __v_0[i] = 0xAA;
+}
+function __f_12(__v_6) {
+  if (__v_6 < 0) {
+    __v_1 = __v_0[__v_6 + 10];
+    return __v_1;
+  }
+}
+
+assertEquals(0xAA, __f_12(-1));
+%OptimizeFunctionOnNextCall(__f_12);
+assertEquals(0xAA, __f_12(-1));