[llvm] [LAA] Hoist setting condition for RT-checks (PR #128045)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

So I thought about this patch, and I think we are already quite unprincipled in our criterion for retrying with runtime checks. The unintended side-effect of this patch is that we retry with runtime checks in one additional corner case, but this is not a problem for correctness: I hence think we should go ahead with this patch, if only for the reason of making progress in terms of having a more maintainable LAA and to unblock #122318.

https://github.com/llvm/llvm-project/pull/128045