Index: lib/CodeGen/TailDuplicator.cpp
===================================================================
--- lib/CodeGen/TailDuplicator.cpp
+++ lib/CodeGen/TailDuplicator.cpp
@@ -814,6 +814,7 @@
   // This has to check PrevBB->succ_size() because EH edges are ignored by
   // AnalyzeBranch.
   if (PrevBB->succ_size() == 1 &&
+      *PrevBB->succ_begin() == TailBB &&
       !TII->AnalyzeBranch(*PrevBB, PriorTBB, PriorFBB, PriorCond, true) &&
       PriorCond.empty() && !PriorTBB && TailBB->pred_size() == 1 &&
       !TailBB->hasAddressTaken()) {