Index: include/llvm/Target/TargetSubtargetInfo.h
===================================================================
--- include/llvm/Target/TargetSubtargetInfo.h
+++ include/llvm/Target/TargetSubtargetInfo.h
@@ -25,6 +25,7 @@
 class DataLayout;
 class MachineFunction;
 class MachineInstr;
+class ScheduleDAGInstrs;
 class SDep;
 class SUnit;
 class TargetFrameLowering;
@@ -154,6 +155,9 @@
   // dependency.
   virtual void adjustSchedDependency(SUnit *def, SUnit *use, SDep &dep) const {}
 
+  // \brief Perform target-specific postprocessing of the schedule graph.
+  virtual void postprocessSchedGraph(ScheduleDAGInstrs &DAG) const {}
+
   // For use with PostRAScheduling: get the anti-dependence breaking that should
   // be performed before post-RA scheduling.
   virtual AntiDepBreakMode getAntiDepBreakMode() const { return ANTIDEP_NONE; }
Index: lib/CodeGen/ScheduleDAGInstrs.cpp
===================================================================
--- lib/CodeGen/ScheduleDAGInstrs.cpp
+++ lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -1091,6 +1091,8 @@
   Uses.clear();
   CurrentVRegDefs.clear();
   CurrentVRegUses.clear();
+
+  ST.postprocessSchedGraph(*this);
 }
 
 raw_ostream &llvm::operator<<(raw_ostream &OS, const PseudoSourceValue* PSV) {