[polly] r256199 - Add option to assume single-loop scops with sufficient compute are profitable

[Johannes Doerfert via llvm-commits]

On 12/21, Tobias Grosser via llvm-commits wrote:
> +  for (auto *BB : Context.CurRegion.blocks())
> +    if (Context.CurRegion.contains(LI->getLoopFor(BB)))
> +      InstCount += std::distance(BB->begin(), BB->end());
Whye not BB->size() ?
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