[PATCH] D139076: [InstCombine] fold icmp + select pattern by distributive laws

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`C ? (Y != X) : (Z != X) --> (C ? Y : Z) != X`
`C ? (Y == X) : (Z == X) --> (C ? Y : Z) == X`

https://alive2.llvm.org/ce/z/-frXfs


https://reviews.llvm.org/D139076

Files:
  llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
  llvm/test/Transforms/InstCombine/select-cmp.ll

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