[RFC 1/2] Turn RETURN_ADDR_IN_PREVIOUS_FRAME into C expression

[augustine.sterling@gmail.com]

On Sat, Feb 28, 2015 at 10:14 AM, Max Filippov <jcmvbkbc@gmail.com> wrote:
> This allows a target to support both windowed and non-windowed ABI.
>
> 2015-02-28  Max Filippov  <jcmvbkbc@gmail.com>
>
> gcc/
>         * builtins.c (expand_builtin_return_addr): Add
>         RETURN_ADDR_IN_PREVIOUS_FRAME to 'if' condition.
>         * config/sparc/sparc.h (RETURN_ADDR_IN_PREVIOUS_FRAME): Change
>         definition to 1.
>         * config/xtensa/xtensa.h (RETURN_ADDR_IN_PREVIOUS_FRAME):
>         Likewise.

Unfortunately, I can't approve a change to spark.h, even though this
seems quite innocuous to me. I'm not sure why it is even relevant to
xtensa.

Without that, approved.