[llvm] [AMDGPU] Do not preserve UniformityInfo (PR #76696)

[Jay Foad via llvm-commits]

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@@ -85,7 +85,6 @@ class AMDGPURewriteUndefForPHILegacy : public FunctionPass {
     AU.addRequired<DominatorTreeWrapperPass>();
 
     AU.addPreserved<DominatorTreeWrapperPass>();
-    AU.addPreserved<UniformityInfoWrapperPass>();
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jayfoad wrote:

> Will anything break in a future change if this is re-added?

Unfortunately we have never had a good way to diagnose this problem (preserving an analysis but not one of its transitive dependencies). I did once look at adding something to the legacy pass manager to detect it early (when adding passes instead of when running them) but never finished it.

https://github.com/llvm/llvm-project/pull/76696