[llvm] [SimplifyCFG] Skip threading if the target may have divergent branches (PR #100185)

[Sameer Sahasrabuddhe via llvm-commits]

ssahasra wrote:

> If there is no objection, I will land this change.

The change was merged without addressing my comment about where the actual check for TTI should be. 



https://github.com/llvm/llvm-project/pull/100185