diff --git a/llvm/lib/CodeGen/BranchFolding.cpp b/llvm/lib/CodeGen/BranchFolding.cpp
index 1a2117b9123e..9ed805174b4b 100644
--- a/llvm/lib/CodeGen/BranchFolding.cpp
+++ b/llvm/lib/CodeGen/BranchFolding.cpp
@@ -1230,8 +1230,8 @@ ReoptimizeBlock:
     // If the previous block unconditionally falls through to this block and
     // this block has no other predecessors, move the contents of this block
     // into the prior block. This doesn't usually happen when SimplifyCFG
-    // has been used, but it can happen if tail duplication eliminates all the
-    // non-branch predecessors of a block leaving only the fall-through edge.
+    // has been used, but it can happen if tail merging splits a fall-through
+    // predecessor of a block.
     // This has to check PrevBB->succ_size() because EH edges are ignored by
     // AnalyzeBranch.
     if (PriorCond.empty() && !PriorTBB && MBB->pred_size() == 1 &&