[llvm] [UniformityAnalysis] Skip CycleAnalysis on targets without branch divergence (PR #189948)

[Pankaj Dwivedi via llvm-commits]

PankajDwivedi-25 wrote:

> > > I'm slightly surprised that this does not affect tests like `test/CodeGen/AMDGPU/llc-pipeline-npm.ll`.
> > 
> > 
> > isn't this beacuse test runs with `-mtriple=amdgcn--amdhsa`, so hasBranchDivergence() returns true?
> 
> Yes you're right. I was thinking about similar tests for other targets. I thought they might show that cycle analysis is no longer run in some cases.

It's because UniformityInfoAnalysis is not part of the other pipeline at all.

https://github.com/llvm/llvm-project/pull/189948