search for: pargmas

Pekka, I am in favor of adding metadata to control different aspects of vectorization, mainly for supporting user-level pargmas [1] but also for DSLs. Before we start adding metadata to the IR we need to define the semantics of the tags. "Parallel_for" is too general. We also want to control vectorization factor, unroll factor, cost model, etc. Doug Gregor suggested to add the metadata to the branch instruction...

> I am in favor of adding metadata to control different aspects of > vectorization, mainly for supporting user-level pargmas [1] but also for > DSLs. Before we start adding metadata to the IR we need to define the > semantics of the tags. "Parallel_for" is too general. We also want to control > vectorization factor, unroll factor, cost model, etc. These are used to control *how* the loops are parallel...

On 01/25/2013 04:21 PM, Hal Finkel wrote: > My point is that I specifically think that you should try it. I'm curious > to see how what you come up with might apply to other use cases as well. OK, attached is the first quick attempt towards this. I'm not proposing committing this, but would like to get comments to possibly move towards something committable. It simply looks for a

...s without too much effort ;). I just don't know (yet) where to start - can you give me a hint, Pekka? Cheers, Ralf On 1/25/13 10:54 PM, Pekka Jääskeläinen wrote: >> I am in favor of adding metadata to control different aspects of >> vectorization, mainly for supporting user-level pargmas [1] but also for >> DSLs. Before we start adding metadata to the IR we need to define the >> semantics of the tags. "Parallel_for" is too general. We also want to >> control >> vectorization factor, unroll factor, cost model, etc. > > These are used to contro...