add a note
llvm-svn: 33578
diff --git a/llvm/lib/Support/SmallPtrSet.cpp b/llvm/lib/Support/SmallPtrSet.cpp
index 0e6d334..48552a5 100644
--- a/llvm/lib/Support/SmallPtrSet.cpp
+++ b/llvm/lib/Support/SmallPtrSet.cpp
@@ -7,7 +7,8 @@
//
//===----------------------------------------------------------------------===//
//
-// This file implements the SmallPtrSet class.
+// This file implements the SmallPtrSet class. See SmallPtrSet.h for an
+// overview of the algorithm.
//
//===----------------------------------------------------------------------===//