[Polly] Annotate reduction dependences

[Tobias Grosser]

On 01/08/2014 09:01, Johannes Doerfert wrote:
> I split the old patch again and attached all parts to this mail.
>
> I also tried to include your comments. However, the print method looks different
> now (because of the printLine patch) so I had to rewrite this part. The second
> patch (is*Parallel change) was a result if this rewriting, but is also a step
> closer to the goal of allowing reductions in the backend.

LGTM.

Tobias