Silence a bunch of implicit fallthrough warnings

llvm-svn: 321114
diff --git a/llvm/lib/Transforms/IPO/WholeProgramDevirt.cpp b/llvm/lib/Transforms/IPO/WholeProgramDevirt.cpp
index ec56f0c..5fbb001 100644
--- a/llvm/lib/Transforms/IPO/WholeProgramDevirt.cpp
+++ b/llvm/lib/Transforms/IPO/WholeProgramDevirt.cpp
@@ -1346,6 +1346,7 @@
       Constant *Bit = importConstant(Slot, CSByConstantArg.first, "bit", Int8Ty,
                                      ResByArg.Bit);
       applyVirtualConstProp(CSByConstantArg.second, "", Byte, Bit);
+      break;
     }
     default:
       break;