[llvm] [UniformityAnalysis] Replace DivergentValues with UniformValues for conservative divergence queries (PR #180509)

[Pankaj Dwivedi via llvm-commits]

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PankajDwivedi-25 wrote:

Right, but that will still lead to iterating over the function to check anything divergent, which can be avoided early.

https://github.com/llvm/llvm-project/pull/180509