Index: lib/Transforms/Scalar/LoopUnswitch.cpp
===================================================================
--- lib/Transforms/Scalar/LoopUnswitch.cpp
+++ lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -641,6 +641,10 @@
         break;
       }
     }
+  } else {
+    // TrivialUnswitchCondition can only apply to BranchInst or SwitchInst.
+    // Anything else should return false immediately.
+    return false;
   }
 
   // If we didn't find a single unique LoopExit block, or if the loop exit block