Implement simple support for vector casting.  This can currently only handle
casts between legal vector types.

llvm-svn: 26961
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index fcca7e3..ad66057 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2676,6 +2676,7 @@
   case ISD::SCALAR_TO_VECTOR:   return "scalar_to_vector";
   case ISD::VBUILD_VECTOR: return "vbuild_vector";
   case ISD::VECTOR_SHUFFLE: return "vector_shuffle";
+  case ISD::VBIT_CONVERT: return "vbit_convert";
   case ISD::ADDC:        return "addc";
   case ISD::ADDE:        return "adde";
   case ISD::SUBC:        return "subc";