[SCEV] Fix control flow warning (NFC)

diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index d86d04c7641678418291091c585cbf6f8de5ec57..5da3aaac3c2328dc8a823dd95f3ea6a882abdd34 100644 (file)
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -9817,6 +9817,7 @@ ScalarEvolution::getWithOperands(const SCEV *S,
   case scCouldNotCompute:
     llvm_unreachable("Attempt to use a SCEVCouldNotCompute object!");
   }
+  llvm_unreachable("Unknown SCEV kind!");
 }
 
 const SCEV *ScalarEvolution::computeSCEVAtScope(const SCEV *V, const Loop *L) {