[llvm] [IndVarSimplify] Fix `IndVarSimplify` to skip on unfolding predicates when the loop contains control convergence operations. (PR #165643)

[Lucie Choi via llvm-commits]

luciechoi wrote:

Discussed internally, will merge and come back if there are any issues

https://github.com/llvm/llvm-project/pull/165643