diff --git a/llvm/include/llvm/CodeGen/ScheduleDAG.h b/llvm/include/llvm/CodeGen/ScheduleDAG.h
--- a/llvm/include/llvm/CodeGen/ScheduleDAG.h
+++ b/llvm/include/llvm/CodeGen/ScheduleDAG.h
@@ -568,6 +568,9 @@
     bool StressSched;
 #endif
 
+    ScheduleDAG(const ScheduleDAG &) = delete;
+    ScheduleDAG &operator=(const ScheduleDAG &) = delete;
+
     explicit ScheduleDAG(MachineFunction &mf);
 
     virtual ~ScheduleDAG();