[llvm] [DSE] Apply initializes attribute to DSE (PR #107282)

[Jan Voung via llvm-commits]

https://github.com/jvoung commented:

Thanks! LG to me, but defer to other reviewers for approval.

I think aeubanks had one unresolved comment about a TODO comment?

https://github.com/llvm/llvm-project/pull/107282