Implement support for the formal_arguments node.  To get this, targets shouldcustom legalize it and remove their XXXTargetLowering::LowerArguments overload


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27604 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index b95a85e..bcdbef1 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2714,6 +2714,7 @@
   case ISD::MERGE_VALUES:  return "mergevalues";
   case ISD::INLINEASM:     return "inlineasm";
   case ISD::HANDLENODE:    return "handlenode";
+  case ISD::FORMAL_ARGUMENTS: return "formal_arguments";
     
   // Unary operators
   case ISD::FABS:   return "fabs";