[llvm] [AMDGPU] Fix non-determinism in DenseSet (PR #66617)

[Jay Foad via llvm-commits]

https://github.com/jayfoad approved this pull request.

Code looks fine thanks. I suggest changing the title to something like "Fix non-deterministic iteration order in SIFixSGPRCopies" since you're not fixinf anything in DenseSet itself.

https://github.com/llvm/llvm-project/pull/66617