I'd like to add a custom #pragma directive in clang for research purposes. I'm familiar with the LLVM pass-writing interface but new to the rest of LLVM and clang. I've looked into Simone Pellegrini's work on a #pragma interface (https://github.com/motonacciu/clomp and http://llvm.org/devmtg/2013-04/pellegrini-slides.pdf), but I'm in no position to determine if this approach is applicable for the latest version of clang, or how to go about updating things. Any advice would be greatly appreciated. Thanks, David -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140723/c346e6e7/attachment.html>
A number of new pragmas were added recently to clang to support loop optimization hints. The syntax is "#pragma clang loop ..." where "..." is a sequence of hints such as "unroll(4)". These hints result in llvm.loop metadata being added to the IR to annotate the loop. Depending upon what you're doing this may be a good model to follow. Mark On Wed, Jul 23, 2014 at 1:38 PM, David Glanzman <gland at seas.upenn.edu> wrote:> I'd like to add a custom #pragma directive in clang for research > purposes. I'm familiar with the LLVM pass-writing interface but new to the > rest of LLVM and clang. I've looked into Simone Pellegrini's work on a > #pragma interface (https://github.com/motonacciu/clomp and > http://llvm.org/devmtg/2013-04/pellegrini-slides.pdf), but I'm in no > position to determine if this approach is applicable for the latest version > of clang, or how to go about updating things. Any advice would be greatly > appreciated. > > Thanks, > David > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140729/0815a4a4/attachment.html>
Thanks Mark,
I'm giving annotation attributes a shot right now:
__attribute__((annotate("my_annotation"))) gets lowered to
llvm.___annotation intrinsics and seems good for what I'm trying to do.
I'll definitely look into the loop pragma as a backup though.
David
On Tue, Jul 29, 2014 at 2:31 PM, Mark Heffernan <meheff at google.com>
wrote:
> A number of new pragmas were added recently to clang to support loop
> optimization hints. The syntax is "#pragma clang loop ..." where
"..." is
> a sequence of hints such as "unroll(4)". These hints result in
llvm.loop
> metadata being added to the IR to annotate the loop. Depending upon what
> you're doing this may be a good model to follow.
>
> Mark
>
>
> On Wed, Jul 23, 2014 at 1:38 PM, David Glanzman <gland at
seas.upenn.edu>
> wrote:
>
>> I'd like to add a custom #pragma directive in clang for research
>> purposes. I'm familiar with the LLVM pass-writing interface but
new to the
>> rest of LLVM and clang. I've looked into Simone Pellegrini's
work on a
>> #pragma interface (https://github.com/motonacciu/clomp and
>> http://llvm.org/devmtg/2013-04/pellegrini-slides.pdf), but I'm in
no
>> position to determine if this approach is applicable for the latest
version
>> of clang, or how to go about updating things. Any advice would be
greatly
>> appreciated.
>>
>> Thanks,
>> David
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>
>>
>
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