[Bug target/85961] scratch register rsi used after function call

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85961

--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 15 Jun 2018, rguenth at gcc dot gnu.org wrote:

> So - all process_options () option post-processing should go away and be moved
> to finish_options ()?

I think reducing the amount done in process_options makes sense, yes 
(watch out for any interations with lang_hooks.post_options or 
targetm.target_option.override if you move anything to be executed before 
the calls to those hooks).