Add transforms for `(max/min (xor X, Pow2), X)` -> `(and/or X, Pow2/~Pow2)`

X ^ Pow2 is guranteed to flip one bit. We can use this to speedup
max/min by just selecting X with/without (or/andnot) the flipped bit
respectively.

Alive2 Links:
smax-neg: https://alive2.llvm.org/ce/z/j3QYFs
smin-neg: https://alive2.llvm.org/ce/z/bFYnQW
smax-pos: https://alive2.llvm.org/ce/z/4xYSxR
smin-pos: https://alive2.llvm.org/ce/z/H3RPKj
umax    : https://alive2.llvm.org/ce/z/P4oRcX
umin    : https://alive2.llvm.org/ce/z/vWZG6p

Differential Revision: https://reviews.llvm.org/D144606