diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h
index 71a6dcdeb30..9b097f41c2d 100644
--- a/include/llvm/Target/TargetInstrInfo.h
+++ b/include/llvm/Target/TargetInstrInfo.h
@@ -329,10 +329,16 @@ public:
   ///    just return false, leaving TBB/FBB null.
   /// 2. If this block ends with only an unconditional branch, it sets TBB to be
   ///    the destination block.
-  /// 3. If this block ends with an conditional branch, it returns the 'true'
-  ///    destination in TBB, the 'false' destination in FBB, and a list of
-  ///    operands that evaluate the condition.  These operands can be passed to
-  ///    other TargetInstrInfo methods to create new branches.
+  /// 3. If this block ends with an conditional branch and it falls through to
+  ///    an successor block, it sets TBB to be the branch destination block and a
+  ///    list of operands that evaluate the condition. These
+  ///    operands can be passed to other TargetInstrInfo methods to create new
+  ///    branches.
+  /// 4. If this block ends with an conditional branch and an unconditional
+  ///    block, it returns the 'true' destination in TBB, the 'false' destination
+  ///    in FBB, and a list of operands that evaluate the condition. These
+  ///    operands can be passed to other TargetInstrInfo methods to create new
+  ///    branches.
   ///
   /// Note that RemoveBranch and InsertBranch must be implemented to support
   /// cases where this method returns success.