[llvm-dev] [RFC] Remove Darwin support from POWER Backends

[Eric Christopher via llvm-dev]

Not that I know of... if they break we can just ignore them :)

-eric

On Fri, Aug 24, 2018 at 7:06 AM Kit Barton via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Thanks for the feedback everyone.
>
> Does anyone know if there are any remaining darwin/ppc build bots? I
> looked but could not find any yesterday. I think that is the last thing to
> take care of before committing the patches.
>
> Thanks,
>
> Kit
>
> On Thu, Aug 23, 2018 at 12:28 AM Chris Lattner <clattner at nondot.org>
> wrote:
>
>> 😥 it was nice knowing you darwin/ppc, but it is now time to say
>> goodbye.  +1 from me.
>>
>> -Chris
>>
>>
>> > On Aug 20, 2018, at 12:42 PM, Kit Barton via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>> >
>> > Hi all,
>> > I just posted two patches on phabricator to remove Darwin support from
>> the POWER backend.
>> >
>> > I thought I had posted this on the dev mailing list some time ago, but
>> I cannot find a reference to it now.
>> >
>> > The intention here is to cleanup the POWER backend. Darwin has not been
>> supported on POWER for quite some time now, and we'd like to use this as an
>> opportunity to clean up several aspects of the backend code. If there is
>> any concerns with this, please let me know.
>> >
>> > As for the approach, the patch that I posted will issue an error
>> message from the backend if you attempt to use the Darwin ABI on PPC. The
>> intention is that once this patch lands, all of the Darwin-specific code
>> paths will essentially be dead-code, and we can remove them on demand as
>> we're touching various pieces of code. This cleanup should be done in
>> stand-alone patches, but can be done as NFC changes and thus reviewed
>> post-commit, whenever possible.
>> >
>> > I've cleaned up all of the test cases effected by this, mostly by
>> converting them to a different powerpc target so as to not lose test
>> coverage. There were a few tests that were ppc-darwin specific, which were
>> removed.
>> >
>> > There is a companion patch to clean up test cases in Clang as well. I
>> think we can use a similar approach for cleaning up ppc-specific darwin
>> code in Clang, although I don't have a good idea right now for how much
>> cleanup that will be.
>> >
>> > Thanks.
>> >
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>>
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