Index: include/llvm/CodeGen/LatencyPriorityQueue.h
===================================================================
--- include/llvm/CodeGen/LatencyPriorityQueue.h
+++ include/llvm/CodeGen/LatencyPriorityQueue.h
@@ -83,6 +83,15 @@
 
     void remove(SUnit *SU) override;
 
+    void dump(ScheduleDAG *DAG) const {
+      dbgs() << "Latency Priority Queue\n";
+      dbgs() << "  Number of Queue Entries: " << Queue.size() << "\n";
+      for(auto const& SU: Queue) {
+        dbgs() << "    ";
+        SU->dump(DAG);
+      }
+    }
+
     // scheduledNode - As nodes are scheduled, we look to see if there are any
     // successor nodes that have a single unscheduled predecessor.  If so, that
     // single predecessor has a higher priority, since scheduling it will make