[polly] r230624 - Allow non-affine control flow by default

[Tobias Grosser]

On 26.02.2015 22:56, Johannes Doerfert wrote:
> I found the problem,.. dominance + SCEVExpander + RegionMap can make a
> bad combination. I will look into it and fix it at the latest tomorrow.

Great. I just started to rebuild clang+LLVM. As our LNT builders do not 
send warnings, there is no need to rush a fix in or revert.

Thanks again for looking,
Tobias