[Bug rtl-optimization/63620] RELOAD lost SET_GOT dependency on Darwin

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63620

--- Comment #9 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Stupachenko Evgeny from comment #8)
> (In reply to Uroš Bizjak from comment #7)
> > The difference si that the call to f128_p3 does not expand with "use (reg:SI
> > bx)" tag in the Darwin case. Probably ix86_expand_call should be fixed for
> > TARGET_MACHO
> 
> Darwin generates indirect access throw generated section: .symbol_stub.
> They don't use EBX in the call even without any changes (relaxing EBX usage).

I guess that the mentioned "use" in the call is what keeps PIC register live
accross push in the non-Darwin case.