DAG post-process for Hexagon MI scheduler

This patch introduces a possibility for Hexagon MI scheduler
to perform some target specific post- processing on the scheduling
DAG prior to scheduling.

llvm-svn: 163903

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonMachineScheduler.h b/llvm/lib/Target/Hexagon/HexagonMachineScheduler.h
index 51829742fff..5b6f226a00e 100644
--- a/llvm/lib/Target/Hexagon/HexagonMachineScheduler.h
+++ b/llvm/lib/Target/Hexagon/HexagonMachineScheduler.h
@@ -114,6 +114,8 @@ public:
   /// Schedule - This is called back from ScheduleDAGInstrs::Run() when it's
   /// time to do some work.
   virtual void schedule();
+  /// Perform platform specific DAG postprocessing.
+  void postprocessDAG();
 };
 
 /// ConvergingVLIWScheduler shrinks the unscheduled zone using heuristics
@@ -222,6 +224,11 @@ public:
 
   virtual void releaseBottomNode(SUnit *SU);
 
+  unsigned ReportPackets() {
+    return Top.ResourceModel->getTotalPackets() +
+           Bot.ResourceModel->getTotalPackets();
+  }
+
 protected:
   SUnit *pickNodeBidrectional(bool &IsTopNode);