We stop the walk when we reach j's immediate dominator - j is in the
dominance frontier of each of the nodes in the walk, except for j's
immediate dominator. Intuitively, all of the rest of j's dominators are
shared by j's predecessors as well.
Since they dominate j, they will not have j in their dominance frontiers.
We stop the walk when we reach j's immediate dominator - j is in the
dominance frontier of each of the nodes in the walk, except for j's
immediate dominator. Intuitively, all of the rest of j's dominators are
shared by j's predecessors as well.
Since they dominate j, they will not have j in their dominance frontiers.