[turbofan] Workaround for unknown array literal length.

test/mjsunit/regress/regress-crbug-669850.js

Index: test/mjsunit/regress/regress-crbug-669850.js
diff --git a/test/mjsunit/regress/regress-crbug-669850.js b/test/mjsunit/regress/regress-crbug-669850.js
new file mode 100644
index 0000000000000000000000000000000000000000..daf5a24f456788ddf1a5f237a0f1f5a89c1fb253
--- /dev/null
+++ b/test/mjsunit/regress/regress-crbug-669850.js
@@ -0,0 +1,11 @@
+// Copyright 2016 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 --turbo
+
+eval('function f(a) { return [' + new Array(1 << 17) + ',a] }');
+assertEquals(23, f(23)[1 << 17]);
+assertEquals(42, f(42)[1 << 17]);
+%OptimizeFunctionOnNextCall(f);
+assertEquals(65, f(65)[1 << 17]);