diff --git a/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
index 21319ffe20f9ff..e1df4b420a4c4c 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
@@ -78,13 +78,6 @@ struct AMDGPUOutgoingValueHandler : public CallLowering::OutgoingValueHandler {
     MIRBuilder.buildCopy(PhysReg, ExtReg);
     MIB.addUse(PhysReg, RegState::Implicit);
   }
-
-  bool assignArg(unsigned ValNo, EVT OrigVT, MVT ValVT, MVT LocVT,
-                 CCValAssign::LocInfo LocInfo,
-                 const CallLowering::ArgInfo &Info, ISD::ArgFlagsTy Flags,
-                 CCState &State) override {
-    return AssignFn(ValNo, ValVT, LocVT, LocInfo, Flags, State);
-  }
 };
 
 struct AMDGPUIncomingArgHandler : public CallLowering::IncomingValueHandler {