diff --git a/llvm/lib/Target/RISCV/RISCVMachineFunctionInfo.h b/llvm/lib/Target/RISCV/RISCVMachineFunctionInfo.h
new file mode 100644
index 0000000..433a3fb
--- /dev/null
+++ b/llvm/lib/Target/RISCV/RISCVMachineFunctionInfo.h
@@ -0,0 +1,44 @@
+//=- RISCVMachineFunctionInfo.h - RISCV machine function info -----*- C++ -*-=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares RISCV-specific per-machine-function information.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_RISCV_RISCVMACHINEFUNCTIONINFO_H
+#define LLVM_LIB_TARGET_RISCV_RISCVMACHINEFUNCTIONINFO_H
+
+#include "llvm/CodeGen/MachineFunction.h"
+
+namespace llvm {
+
+/// RISCVMachineFunctionInfo - This class is derived from MachineFunctionInfo
+/// and contains private RISCV-specific information for each MachineFunction.
+class RISCVMachineFunctionInfo : public MachineFunctionInfo {
+
+  /// FrameIndex for start of varargs area
+  int VarArgsFrameIndex = 0;
+  /// Size of the save area used for varargs
+  int VarArgsSaveSize = 0;
+
+public:
+  RISCVMachineFunctionInfo() = default;
+
+  explicit RISCVMachineFunctionInfo(MachineFunction &MF) {}
+
+  int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
+  void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
+
+  unsigned getVarArgsSaveSize() const { return VarArgsSaveSize; }
+  void setVarArgsSaveSize(int Size) { VarArgsSaveSize = Size; }
+};
+
+} // end namespace llvm
+
+#endif // LLVM_LIB_TARGET_RISCV_RISCVMACHINEFUNCTIONINFO_H