diff --git a/lib/Target/TargetLoweringObjectFile.cpp b/lib/Target/TargetLoweringObjectFile.cpp
index 9f2b715..70abe5a 100644
--- a/lib/Target/TargetLoweringObjectFile.cpp
+++ b/lib/Target/TargetLoweringObjectFile.cpp
@@ -240,6 +240,7 @@
   case Constant::GlobalRelocations:
     return SectionKind::getDataRel();
   }
+  llvm_unreachable("Invalid relocation");
 }
 
 /// SectionForGlobal - This method computes the appropriate section to emit