diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index e41da85cf3a..6c9c5908d04 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -184,10 +184,6 @@ public:
     return getNode(ISD::CopyFromReg, ResultTys, Ops);
   }
 
-  SDOperand getImplicitDef(SDOperand Chain, unsigned Reg, MVT::ValueType VT) {
-    return getNode(ISD::ImplicitDef, MVT::Other, Chain, getRegister(Reg, VT));
-  }
-
   /// getCall - Note that this destroys the vector of RetVals passed in.
   ///
   SDNode *getCall(std::vector<MVT::ValueType> &RetVals, SDOperand Chain,
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index bf0191031b0..61143a75ce7 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -92,12 +92,6 @@ namespace ISD {
     // SelectionDAG.  The register is available from the RegSDNode object.
     CopyFromReg,
 
-    // ImplicitDef - This node indicates that the specified register is
-    // implicitly defined by some operation (e.g. its a live-in argument).  The
-    // two operands to this are the token chain coming in and the register.
-    // The only result is the token chain going out.
-    ImplicitDef,
-
     // UNDEF - An undefined node
     UNDEF,