[PATCH] Have 'this'-returning constructors and destructors to take advantage of the new backend 'returned' attribute

[Stephen Lin]

Hi John,

Do you think this can go in?

If you have any suggestions for implementation improvements or extra
tests (either front-end or back-end) let me know; in addition to the
front-end tests added in this patch the relevant the back-end tests
are:

llvm/test/CodeGen/ARM/this-return.ll
llvm/test/CodeGen/ARM/returned-ext.ll
llvm/test/CodeGen/X86/this-return-64.ll

Thanks,
Stephen

On Mon, May 6, 2013 at 6:50 AM, Stephen Lin <swlin at post.harvard.edu> wrote:
>> Enabling a new and not-necessarily-deeply-tested feature/optimization is
>> actually specifically the sort of thing we try *not* to do right before a
>> release branch. :)
>
> Oh OK. Well, I just thought it'd be better if the backend and frontend
> portions of this went out in the same release. If it's not really
> worth it at this point then I'm OK waiting. Let me know.
>
> -Stephen