diff --git a/llvm/include/llvm/CodeGen/MachineScheduler.h b/llvm/include/llvm/CodeGen/MachineScheduler.h
--- a/llvm/include/llvm/CodeGen/MachineScheduler.h
+++ b/llvm/include/llvm/CodeGen/MachineScheduler.h
@@ -135,6 +135,8 @@
   RegisterClassInfo *RegClassInfo;
 
   MachineSchedContext();
+  MachineSchedContext &operator=(const MachineSchedContext &other) = delete;
+  MachineSchedContext(const MachineSchedContext &other) = delete;
   virtual ~MachineSchedContext();
 };