[clang] [clang][analyzer] Enable loop unrolling by default (PR #178911)

[Balázs Benics via cfe-commits]

steakhal wrote:

> > @necto are you interested measuring this patch? Do you have unrolling enabled? Do you have prior experience with this?
> 
> Thanks for the ping! We have loop unrolling enabled, so this patch is a no-op for us. I will not evaluate it.

This is great. So we know that it doesn't crash, or impose really bad analysis times and I also know we had a look at outliers so this should be all pointing that this is fine. I'll still think about this on the weekend, but it's a really good indication.
Thank you for sharing!

https://github.com/llvm/llvm-project/pull/178911