Expand head-of-file comment.
llvm-svn: 13982
diff --git a/llvm/lib/Transforms/Instrumentation/ProfilePaths/CombineBranch.cpp b/llvm/lib/Transforms/Instrumentation/ProfilePaths/CombineBranch.cpp
index a4197cb..e395b26 100644
--- a/llvm/lib/Transforms/Instrumentation/ProfilePaths/CombineBranch.cpp
+++ b/llvm/lib/Transforms/Instrumentation/ProfilePaths/CombineBranch.cpp
@@ -7,7 +7,9 @@
//
//===----------------------------------------------------------------------===//
//
-// Combine branches
+// Combine multiple back-edges going to the same sink into a single
+// back-edge. This introduces a new basic block and back-edge branch for each
+// such sink.
//
//===----------------------------------------------------------------------===//