[InstCombine] Propagate NSW in ~((-X) | Y) --> (X - 1) & (~Y) #149359
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https://alive2.llvm.org/ce/z/qojyPF
If -X is nsw, then X - 1 must be too.
This is because -X can only be nsw if X is any number that is not
INT_MIN. And if X is not INT_MIN, then X - 1 must be nsw.