* 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.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@35657 138bc75d-0d04-0410-961f-82ee72b054a4