Hi, The document for "Adding a new SelectionDAG node" ( @ http://llvm.org/releases/2.9/docs/ExtendingLLVM.html#sdnode ) says, "1. include/llvm/CodeGen/SelectionDAGNodes.h: Add an enum value for the new SelectionDAG node." Where exactly shall one add the info for new SelectionDAG ? I dont see enums for other SDnodes too. Please help. Regards, Ankur