//===----------------------------------------------------------------------===//
//
// This file defines the following classes:
-// 1. DominatorTree: Represent the ImmediateDominator as an explicit tree
-// structure.
+// 1. DominatorTree: Represent dominators as an explicit tree structure.
// 2. ETForest: Efficient data structure for dominance comparisons and
// nearest-common-ancestor queries.
// 3. DominanceFrontier: Calculate and hold the dominance frontier for a
//
// These data structures are listed in increasing order of complexity. It
// takes longer to calculate the dominator frontier, for example, than the
-// ImmediateDominator mapping.
+// DominatorTree mapping.
//
//===----------------------------------------------------------------------===//