Index: include/llvm/CodeGen/MachineScheduler.h
===================================================================
--- include/llvm/CodeGen/MachineScheduler.h
+++ include/llvm/CodeGen/MachineScheduler.h
@@ -302,6 +302,10 @@
     return SchedImpl->doMBBSchedRegionsTopDown();
   }
 
+  // Returns AliasAnalysis instance for use in Hazard Recognizer.
+  // The returned AliasAnalysis may be nullptr.
+  AliasAnalysis* getAA() const { return AA; }
+
   // Returns LiveIntervals instance for use in DAG mutators and such.
   LiveIntervals *getLIS() const { return LIS; }
 
Index: include/llvm/CodeGen/ScheduleDAGInstrs.h
===================================================================
--- include/llvm/CodeGen/ScheduleDAGInstrs.h
+++ include/llvm/CodeGen/ScheduleDAGInstrs.h
@@ -182,6 +182,10 @@
     SUnit *BarrierChain = nullptr;
 
   public:
+    // Returns AliasAnalysis instance for use in Hazard Recognizer.
+	// The returned AliasAnalysis may be nullptr.
+    virtual AliasAnalysis* getAA() const { return AAForDep; }
+
     /// A list of SUnits, used in Value2SUsMap, during DAG construction.
     /// Note: to gain speed it might be worth investigating an optimized
     /// implementation of this data structure, such as a singly linked list
Index: lib/CodeGen/PostRASchedulerList.cpp
===================================================================
--- lib/CodeGen/PostRASchedulerList.cpp
+++ lib/CodeGen/PostRASchedulerList.cpp
@@ -184,6 +184,9 @@
     ///
     void finishBlock() override;
 
+	// Returns AliasAnalysis instance for use in Hazard Recognizer.
+	AliasAnalysis* getAA() const { return AA; }
+
   private:
     /// Apply each ScheduleDAGMutation step in order.
     void postprocessDAG();