Expand head-of-file comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13982 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Instrumentation/ProfilePaths/CombineBranch.cpp b/lib/Transforms/Instrumentation/ProfilePaths/CombineBranch.cpp
index a4197cbb2077296d17ddf7b4033418b58b3a0e1b..e395b26c82127f30343a6a6d650992d0baf3bdf4 100644 (file)
--- a/lib/Transforms/Instrumentation/ProfilePaths/CombineBranch.cpp
+++ b/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.
 //
 //===----------------------------------------------------------------------===//