Add a new ISD::CALL node, make the default impl of TargetLowering::LowerCallTo
produce it.

llvm-svn: 28338
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index cf1d41f..41c1193 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2841,6 +2841,7 @@
   case ISD::INLINEASM:     return "inlineasm";
   case ISD::HANDLENODE:    return "handlenode";
   case ISD::FORMAL_ARGUMENTS: return "formal_arguments";
+  case ISD::CALL:          return "call";
     
   // Unary operators
   case ISD::FABS:   return "fabs";