Index: lib/Transforms/Scalar/LoopUnswitch.cpp
===================================================================
--- lib/Transforms/Scalar/LoopUnswitch.cpp
+++ lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -641,7 +641,8 @@
         break;
       }
     }
-  }
+  } else
+	  return false;
 
   // If we didn't find a single unique LoopExit block, or if the loop exit block
   // contains phi nodes, this isn't trivial.