sibcall.c (uses_addressof): Accept both addressof and current_function_internal_arg_pointer inside a mem.

        * sibcall.c (uses_addressof): Accept both addressof and
        current_function_internal_arg_pointer inside a mem.
        (optimize_sibling_and_tail_recursive_call): Fail tail recursion
        if current_function_uses_addressof.
        * stmt.c (expand_return): Kill tail recursion and HAVE_return
        optimizations.

From-SVN: r35657