[ValueTracking] Checking haveNoCommonBitsSet for (x & y) and ~(x | y)
This one tries to fix:
https://github.com/llvm/llvm-project/issues/53357.
Simply, this one would check (x & y) and ~(x | y) in
haveNoCommonBitsSet. Since they shouldn't have common bits (we could
traverse the case by enumerating), and we could convert this one to (x &
y) | ~(x | y) . Then the compiler could handle it in
InstCombineAndOrXor.
Further more, since ((x & y) + (~x & ~y)) would be converted to ((x & y)
+ ~(x | y)), this patch would fix it too.
https://alive2.llvm.org/ce/z/qsKzRS
Reviewed By: spatel, xbolva00, RKSimon, lebedev.ri
Differential Revision: https://reviews.llvm.org/D118094