diff --git a/llvm/utils/TableGen/IntrinsicEmitter.cpp b/llvm/utils/TableGen/IntrinsicEmitter.cpp
index 69ac21275c329df11f7eced9f3d2ef84acbd3694..8f0c3a66ab49c6d868a2be4393c1a02f32aeda97 100644
--- a/llvm/utils/TableGen/IntrinsicEmitter.cpp
+++ b/llvm/utils/TableGen/IntrinsicEmitter.cpp
@@ -573,6 +573,8 @@ EmitModRefBehavior(const std::vector<CodeGenIntrinsic> &Ints, raw_ostream &OS){
       OS << "  return DoesNotAccessMemory;\n";
       break;
     case CodeGenIntrinsic::ReadArgMem:
+      OS << "  return AccessesArgumentsReadonly;\n";
+      break;
     case CodeGenIntrinsic::ReadMem:
       OS << "  return OnlyReadsMemory;\n";
       break;