[PATCH] D79528: [ConstantFold] Optimize xor undef, undef to undef

[Chris Lattner via Phabricator via llvm-commits]

lattner added a comment.

I agree, even though this is technically correct, the risk/reward isn't worth it.  LLVM used to do this pervasively, but we switched to producing zero out of practical concerns.


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D79528