Support to provide exception and selector registers.

llvm-svn: 34482
diff --git a/llvm/lib/Target/Alpha/AlphaISelLowering.cpp b/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
index 1674d44..12b299a 100644
--- a/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
+++ b/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
@@ -548,8 +548,11 @@
     return DAG.getNode(AlphaISD::GlobalRetAddr, MVT::i64);
       //FIXME: implement
   case ISD::FRAMEADDR:          break;
+  // Exception address and exception selector.  Currently unimplemented.
+  case ISD::EXCEPTIONADDR: break;
+  case ISD::EHSELECTION:   break;
   }
-
+  
   return SDOperand();
 }