2 files changed, 12 insertions, 1 deletions
diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index 6568d90951..56bd40ae5c 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -537,6 +537,11 @@ public:
   /// for each node deleted.
   void RemoveDeadNode(SDNode *N, DAGUpdateListener *UpdateListener = 0);
   
+  /// RemoveDeadNodes - This method deletes the unreachable nodes in the
+  /// given list, and any nodes that become unreachable as a result.
+  void RemoveDeadNodes(SmallVectorImpl<SDNode *> &DeadNodes,
+                       DAGUpdateListener *UpdateListener = 0);
+
   /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
   /// This can cause recursive merging of nodes in the DAG.  Use the first
   /// version if 'From' is known to have a single result, use the second
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index f5ab0707c4..fe1cab6fe6 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -1315,12 +1315,18 @@ protected:
       ++Ops[i].getVal()->UsesSize;
     }
   }
+
+  /// DropOperands - Release the operands and set this node to have
+  /// zero operands.  This should only be used by HandleSDNode to clear
+  /// its operand list.
+  void DropOperands();
   
   /// MorphNodeTo - This frees the operands of the current node, resets the
   /// opcode, types, and operands to the specified value.  This should only be
   /// used by the SelectionDAG class.
   void MorphNodeTo(unsigned Opc, SDVTList L,
-                   const SDOperand *Ops, unsigned NumOps);
+                   const SDOperand *Ops, unsigned NumOps,
+                   SmallVectorImpl<SDNode *> &DeadNodes);
   
   void addUser(unsigned i, SDNode *User) {
     assert(User->OperandList[i].getUser() && "Node without parent");