[arm64] Fix pre-shifted immediate generation involving csp.

test/mjsunit/regress/regress-725858.js

Index: test/mjsunit/regress/regress-725858.js
diff --git a/test/mjsunit/regress/regress-725858.js b/test/mjsunit/regress/regress-725858.js
new file mode 100644
index 0000000000000000000000000000000000000000..466673f8162dcc83225d628fead4bc0b3aacd2c5
--- /dev/null
+++ b/test/mjsunit/regress/regress-725858.js
@@ -0,0 +1,11 @@
+// Copyright 2017 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
+
+function f() {}
+var src = 'f(' + '0,'.repeat(0x201f) + ')';
+var boom = new Function(src);
+%OptimizeFunctionOnNextCall(boom);
+boom();