[PATCH] D87480: [InstCombine] Simplify select operand based on equality condition

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

This partially subsumes the foldSelectBinOpIdentity() fold at https://github.com/llvm/llvm-project/blob/cb19e8c6d192a108b72ab07362921864a9e244f9/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp#L57, which handles a special case of this (where the equality comparison is to the neutral element of a binary operator). However, that fold also handles floating point equalities, which are tricky due to signed zero, so it can't simply be dropped.


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https://reviews.llvm.org/D87480