--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/Target/WebAssembly/WebAssemblyMachineFunctionInfo.h	Tue Oct 13 17:48:58 2015 +0900
@@ -0,0 +1,43 @@
+// WebAssemblyMachineFunctionInfo.h-WebAssembly 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.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file declares WebAssembly-specific per-machine-function
+/// information.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMACHINEFUNCTIONINFO_H
+#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYMACHINEFUNCTIONINFO_H
+
+#include "WebAssemblyRegisterInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+
+namespace llvm {
+
+/// This class is derived from MachineFunctionInfo and contains private
+/// WebAssembly-specific information for each MachineFunction.
+class WebAssemblyFunctionInfo final : public MachineFunctionInfo {
+  MachineFunction &MF;
+
+  unsigned NumArguments;
+
+public:
+  explicit WebAssemblyFunctionInfo(MachineFunction &MF)
+      : MF(MF), NumArguments(0) {}
+  ~WebAssemblyFunctionInfo() override;
+
+  void setNumArguments(unsigned N) { NumArguments = N; }
+  unsigned getNumArguments() const { return NumArguments; }
+};
+
+} // end namespace llvm
+
+#endif