[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 07:03:41 PDT 2024

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AtariDreams wrote:

@dtcxzyw As this is not a new transformation but rather a precaution/bugfix for an existing one, I would like this to be backported to 19.x

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

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