add a hook so that the new isel can run SDNodeXForms.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96714 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/SelectionDAGISel.h

@@ -137,6 +137,12 @@ protected:
     return false;
   }
   
+  virtual SDValue RunSDNodeXForm(SDValue V, unsigned XFormNo) {
+    assert(0 && "Tblgen shoudl generate this!");
+    return SDValue();
+  }
+
+  
   // Calls to these functions are generated by tblgen.
   SDNode *Select_INLINEASM(SDNode *N);
   SDNode *Select_UNDEF(SDNode *N);