[Polly] [Refactor] Make used analysis passes explicit

[Tobias Grosser]

On 06/08/2014 22:04, Johannes Doerfert wrote:
> Hey Tobias,
>
>
>
> We talked about this a while ago, now I attached a patch to make the use of
> the LoopInfo, ScalarEvolution and the DomTree explicit in the backend.
>
> I still need to write a mail to LLVM-dev (or a patch to llvm-commits) if I
> want to change the SplitBlock interface the same way, but I think this makes
> our code at least cleaner.

LGTM.

Tobias