[cfe-dev] [llvm-dev] RFC: Implementing the Swift calling convention in LLVM and Clang

John McCall via cfe-dev cfe-dev at lists.llvm.org
Wed Mar 2 11:08:55 PST 2016

> On Mar 2, 2016, at 11:04 AM, Renato Golin <renato.golin at linaro.org> wrote:
> On 2 March 2016 at 19:01, John McCall <rjmccall at apple.com> wrote:
>> Also, just a quick question.  I’m happy to continue to talk about the actual
>> design and implementation of LLVM IR on this point, and I’d be happy to
>> put out the actual patch we’re initially proposing.  Obviously, all of this code
>> needs to go through the normal LLVM/Clang code review processes.  But
>> before we continue with that, I just want to clarify one important point: assuming
>> that the actual implementation ends up satisfying your technical requirements,
>> do you have any objections to the general idea of supporting the Swift CC
>> in mainline LLVM?
> I personally don't. I think we should treat Swift as any other
> language that we support, and if we can't use existing mechanisms in
> the back-end to lower Swift, then we need to expand the back-end to
> support that.
> That being said, if the Swift support starts to bit-rot (if, for
> instance, Apple stops supporting it in the future), it will be harder
> to clean up the back-end from its CC. But that, IMHO, is a very
> far-fetched future and a small price to pay.

Okay, thank you.  Back to technical discussion. :)


More information about the cfe-dev mailing list