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This patch adds support for select form of and/or. Currently there is an ongoing effort for moving towards using `select a, b, false` instead of `and i1 a, b` and `select a, true, b` instead of `or i1 a, b` as well. D93065 has links to relevant changes. Alive2 proof: (undef input was disabled due to timeout :( ) - and: https://alive2.llvm.org/ce/z/AgvFbQ - or: https://alive2.llvm.org/ce/z/KjLJyb Differential Revision: https://reviews.llvm.org/D93935