[PATCH] D98410: [ConstantFold] Handle undef/poison when constant folding smul_fix/smul_fix_sat

[Simonas Kazlauskas via Phabricator via llvm-commits]

nagisa added a comment.

Wouldn't folding `C * undef` and `undef * C` into an `undef`, rather than `0`, be valid/better? Is there a reason we cannot do that?


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