Cleaned up comment.

llvm-svn: 45969

1 files changed, 5 insertions, 4 deletions

diff --git a/clang/include/clang/AST/CFG.h b/clang/include/clang/AST/CFG.h
index 28e73f3ba67..fc6f6821998 100644
--- a/clang/include/clang/AST/CFG.h
+++ b/clang/include/clang/AST/CFG.h
@@ -288,10 +288,11 @@ private:
   // to integers to record block-level expressions.
   void*     BlkExprMap;
   
-  // opaque pointer to prevent inclusion of <set>.  This records a set of
-  // CFGBlock edges for using with ProgramPoint.  These edges represent
-  // the edges that cannot be succinctly represented, and in practice this
-  // set should be small.
+  /// BlkEdgeSet - An opaque pointer to prevent inclusion of <set>.
+  ///  The set contains std::pair<CFGBlock*,CFGBlock*> objects that have
+  ///  stable references for use by the 'BlockEdge' class.  This set is intended
+  ///  to be sparse, as it only contains edges whether both the source
+  ///  and destination block have multiple successors/predecessors.
   void*     BlkEdgeSet;
   
   friend class BlockEdge;