Remove the FlaggedNodes member from SUnit. Instead of requiring each SUnit

to carry a SmallVector of flagged nodes, just calculate the flagged nodes
dynamically when they are needed.

The local-liveness change is due to a trivial scheduling change where
the scheduler arbitrary decision differently.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59273 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/ScheduleDAG.h

@@ -95,7 +95,6 @@ namespace llvm {
   private:
     SDNode *Node;                       // Representative node.
   public:
-    SmallVector<SDNode*,4> FlaggedNodes;// All nodes flagged to Node.
     SUnit *OrigNode;                    // If not this, the node from which
                                         // this node was cloned.
     

include/llvm/CodeGen/SelectionDAGNodes.h

@@ -1308,6 +1308,15 @@ public:
     SDVTList X = { ValueList, NumValues };
     return X;
   };
+
+  /// getFlaggedNode - If this node has a flag operand, return the node
+  /// to which the flag operand points. Otherwise return NULL.
+  SDNode *getFlaggedNode() const {
+    if (getNumOperands() != 0 &&
+        getOperand(getNumOperands()-1).getValueType() == MVT::Flag)
+      return getOperand(getNumOperands()-1).getNode();
+    return 0;
+  }
   
   /// getNumValues - Return the number of values defined/returned by this
   /// operator.