[LLVMdev] Parallel Loop Metadata

[Redmond, Paul]

Hi,

Is it fair to say that we require loops to be in canonical form with a single backedge to which we attach llvm.loop.parallel? Or is it the frontend's responsibility to attach the metadata to each backedge?

Looking at the patch there is an assumption that there is a single loop latch. Clang, for example, generates loops with multiple backedges (e.g, while with continue.)

How does pocl deal with this?

paul

On 2013-02-13, at 1:13 PM, Pekka Jääskeläinen wrote:

> On 02/12/2013 11:59 PM, Nadav Rotem wrote:
>> LGTM. Please commit.
> 
> Committed in r175060. Thanks all for the feedback.
> 
> Yes, let's see what evolves as the best way to keep the metadata
> updated after "non-serializing optimizations".
> 
> This metadata is produced by pocl for the "work-item loops" in
> the work group functions. Perhaps the #pragma ivdep support in Clang is
> going to be the next producer.
> 
> -- 
> --Pekka
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev