Two switch blocks in VectorLegalizer::LegalizeOp already have a

  default: llvm_unreachable("This action is not supported yet!");

-- so I'm adding one to the third switch block, too.

This is a follow-up fix for http://reviews.llvm.org/D13862

llvm-svn: 250830
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
index e3633ed..4ec8711 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
@@ -348,6 +348,7 @@
   }
 
   switch (TLI.getOperationAction(Node->getOpcode(), QueryType)) {
+  default: llvm_unreachable("This action is not supported yet!");
   case TargetLowering::Promote:
     Result = Promote(Op);
     Changed = true;