This patch involves boolean ring to simplify logical operations. We can treat & as ring multiplication and ^ as ring addition.
So we need to canonicalize all other operations to * +. Like:
a & b -> a * b a ^ b -> a + b ~a -> a + 1 a | b -> a * b + a + b c ? a : b -> c * a + (c + 1) * b
In the code, we use a mask set to represent an expression. Every value that is not comes from logical operations could be a bit in the mask.
The mask itself is a multiplication chain. The mask set is an addiction chain.
We can calculate two expressions based on boolean algebras.
For now, the initial patch only enabled on and/or/xor, Later we can enhance the code step by step.