diff --git a/include/llvm/Transforms/Scalar.h b/include/llvm/Transforms/Scalar.h
index 7ba7ce85092..6603a29f1a8 100644
--- a/include/llvm/Transforms/Scalar.h
+++ b/include/llvm/Transforms/Scalar.h
@@ -143,7 +143,8 @@ LoopPass *createLoopRotatePass();
 
 //===----------------------------------------------------------------------===//
 //
-// LoopIndexSplit - This pass splits loop
+// LoopIndexSplit - This pass divides loop's iteration range by spliting loop
+// such that each individual loop is executed efficiently.
 //
 LoopPass *createLoopIndexSplitPass();