1 files changed, 28 insertions, 1 deletions
diff --git a/lib/Target/Hexagon/HexagonSubtarget.h b/lib/Target/Hexagon/HexagonSubtarget.h
index c7ae139c4346..9b40c130e622 100644
--- a/lib/Target/Hexagon/HexagonSubtarget.h
+++ b/lib/Target/Hexagon/HexagonSubtarget.h
@@ -18,7 +18,6 @@
 #include "HexagonISelLowering.h"
 #include "HexagonInstrInfo.h"
 #include "HexagonSelectionDAGInfo.h"
-#include "llvm/IR/DataLayout.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetSubtargetInfo.h"
 #include <string>
@@ -47,6 +46,11 @@ public:
   /// default for V60.
   bool UseBSBScheduling;
 
+  class HexagonDAGMutation : public ScheduleDAGMutation {
+  public:
+    void apply(ScheduleDAGInstrs *DAG) override;
+  };
+
 private:
   std::string CPUString;
   HexagonInstrInfo InstrInfo;
@@ -105,6 +109,11 @@ public:
   // compiler time and will be removed eventually anyway.
   bool enableMachineSchedDefaultSched() const override { return false; }
 
+  AntiDepBreakMode getAntiDepBreakMode() const override { return ANTIDEP_ALL; }
+  bool enablePostRAScheduler() const override { return true; }
+
+  bool enableSubRegLiveness() const override;
+
   const std::string &getCPUString () const { return CPUString; }
 
   // Threshold for small data section
@@ -114,6 +123,24 @@ public:
   const HexagonArchEnum &getHexagonArchVersion() const {
     return HexagonArchVersion;
   }
+
+  void getPostRAMutations(
+      std::vector<std::unique_ptr<ScheduleDAGMutation>> &Mutations)
+      const override;
+
+  /// \brief Perform target specific adjustments to the latency of a schedule
+  /// dependency.
+  void adjustSchedDependency(SUnit *def, SUnit *use, SDep& dep) const override;
+
+private:
+  // Helper function responsible for increasing the latency only.
+  void updateLatency(MachineInstr *SrcInst, MachineInstr *DstInst, SDep &Dep)
+      const;
+  void changeLatency(SUnit *Src, SmallVector<SDep, 4> &Deps, SUnit *Dst,
+      unsigned Lat) const;
+  bool isBestZeroLatency(SUnit *Src, SUnit *Dst, const HexagonInstrInfo *TII)
+      const;
+  void changePhiLatency(MachineInstr *SrcInst, SUnit *Dst, SDep &Dep) const;
 };
 
 } // end namespace llvm