[llvm] [Reassociate] Use UniformityInfo to group uniform operands together (PR #198507)

[Pankaj Dwivedi via llvm-commits]

PankajDwivedi-25 wrote:

> I don't understand why you need TTI at all. Isn't UA supposed to be virtually free on targets without divergence? Especially now that the new pass manager also lets you avoid computing CycleInfo?

thanks for mentioning, completely missed this point. The hasBranchDivergence guard is redundant now.

https://github.com/llvm/llvm-project/pull/198507