[llvm] [InstCombine] Check for undef before transforming lshr (mul (X, 2^N + 1)), N -> add (X, lshr(X, N)) (PR #96324)

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Tue Jul 23 09:06:50 PDT 2024

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AtariDreams wrote:

The issue I have is that by masking a partial undef, you turn a partial undef into a full undef

https://github.com/llvm/llvm-project/pull/96324

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