Use the new infrastructure for listening to node updates to

keep the LegalizeTypes node flags up to date when doing a RAUW.
This fixes a nasty bug that Duncan ran into and makes the 
previous (nonbuggy case) more efficent.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46679 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/LegalizeTypes.h

@@ -117,6 +117,13 @@ public:
   
   void run();
   
+  /// ReanalyzeNodeFlags - Recompute the NodeID flags for the specified node,
+  /// adding it to the worklist if ready.
+  void ReanalyzeNodeFlags(SDNode *N) {
+    N->setNodeId(NewNode);
+    MarkNewNodes(N);
+  }
+  
 private:
   void MarkNewNodes(SDNode *N);