[llvm-branch-commits] [llvm] release/19.x: [InstCombine] Drop noundef attributes in `foldCttzCtlz` (#116718) (PR #116865)

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AreaZR wrote:

I am done finding things to backport to 19.x. Hopefully we do like one more round and release 19.1.6 but yeah.

https://github.com/llvm/llvm-project/pull/116865