module MemUnion = Hashtbl.Make (struct
type t = Ptset.Int.t*Ptset.Int.t
- let equal (x,y) (z,t) = x == z || y == t
+ let equal (x,y) (z,t) = x == z && y == t
let equal a b = equal a b || equal b a
let hash (x,y) = (* commutative hash *)
let x = Uid.to_int (Ptset.Int.uid x)