Index: llvm/tools/llvm-cvtres/CMakeLists.txt
===================================================================
--- /dev/null
+++ llvm/tools/llvm-cvtres/CMakeLists.txt
@@ -0,0 +1,13 @@
+set(LLVM_LINK_COMPONENTS
+  Option
+  Support
+  )
+
+set(LLVM_TARGET_DEFINITIONS Opts.td)
+
+tablegen(LLVM Opts.inc -gen-opt-parser-defs)
+add_public_tablegen_target(CvtResTableGen)
+
+add_llvm_tool(llvm-cvtres
+  llvm-cvtres.cpp
+  )
Index: llvm/tools/llvm-cvtres/LLVMBuild.txt
===================================================================
--- /dev/null
+++ llvm/tools/llvm-cvtres/LLVMBuild.txt
@@ -0,0 +1,22 @@
+;===- ./tools/llvm-cvtres/LLVMBuild.txt ------------------------*- Conf -*--===;
+;
+;                     The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+;   http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Tool
+name = llvm-cvtres
+parent = Tools
+required_libraries = Option Support
Index: llvm/tools/llvm-cvtres/Opts.td
===================================================================
--- /dev/null
+++ llvm/tools/llvm-cvtres/Opts.td
@@ -0,0 +1,8 @@
+include "llvm/Option/OptParser.td"
+
+def DEFINE : Joined<["/"], "define:">;
+def FOLDDUPS : Flag<["/"], "folddups">;
+def MACHINE : Joined<["/"], "machine:">;
+def NOLOGO : Flag<["/"], "nologo">;
+def OUT : Joined<["/"], "out:">;
+def READONLY : Flag<["/"], "readonly">;
\ No newline at end of file
Index: llvm/tools/llvm-cvtres/llvm-cvtres.h
===================================================================
--- /dev/null
+++ llvm/tools/llvm-cvtres/llvm-cvtres.h
@@ -0,0 +1,13 @@
+//===- llvm-cvtres.h ------------------------------------------ *- C++ --*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TOOLS_LLVMCVTRES_LLVMCVTRES_H
+#define LLVM_TOOLS_LLVMCVTRES_LLVMCVTRES_H
+
+#endif
Index: llvm/tools/llvm-cvtres/llvm-cvtres.cpp
===================================================================
--- /dev/null
+++ llvm/tools/llvm-cvtres/llvm-cvtres.cpp
@@ -0,0 +1,78 @@
+//===- llvm-cvtres.cpp - Serialize .res files into .obj ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Serialize .res files into .obj files.  This is intended to be a
+// platform-independent port of Microsoft's cvtres.exe.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm-cvtres.h"
+
+#include "llvm/Option/Arg.h"
+#include "llvm/Option/ArgList.h"
+#include "llvm/Option/Option.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+namespace {
+
+enum ID {
+  OPT_INVALID = 0, // This is not an option ID.
+#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
+               HELPTEXT, METAVAR) OPT_##ID,
+#include "Opts.inc"
+#undef OPTION
+};
+
+#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
+#include "Opts.inc"
+#undef PREFIX
+
+static const llvm::opt::OptTable::Info InfoTable[] = {
+#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
+               HELPTEXT, METAVAR)     \
+  { PREFIX, NAME, HELPTEXT, METAVAR, OPT_##ID, llvm::opt::Option::KIND##Class, PARAM, \
+    FLAGS, OPT_##GROUP, OPT_##ALIAS, ALIASARGS },
+#include "Opts.inc"
+#undef OPTION
+};
+
+class CvtResOptTable : public llvm::opt::OptTable {
+public:
+  CvtResOptTable() : OptTable(InfoTable, true) {}
+};
+
+}
+
+int main(int argc_, const char *argv_[]) {
+  CvtResOptTable T;
+  unsigned MAI, MAC;
+  llvm::ArrayRef<const char *> ArgsArr = makeArrayRef(argv_, argc_);
+  llvm::opt::InputArgList inputArgs = T.ParseArgs(ArgsArr, MAI, MAC);
+
+  if (inputArgs.hasArg(OPT_DEFINE))
+    llvm::outs() << "has define flag with symbol "
+                 << inputArgs.getLastArgValue(OPT_DEFINE) << "\n";
+  if (inputArgs.hasArg(OPT_FOLDDUPS))
+    llvm::outs() << "has folddups flag\n";
+  if (inputArgs.hasArg(OPT_MACHINE))
+    llvm::outs() << "has machine flag with value "
+                 << inputArgs.getLastArgValue(OPT_MACHINE) << "\n";
+  if (inputArgs.hasArg(OPT_NOLOGO))
+    llvm::outs() << "has nologo flag\n";
+  if (inputArgs.hasArg(OPT_OUT))
+    llvm::outs() << "has out flag with value "
+                 << inputArgs.getLastArgValue(OPT_OUT) << "\n";
+  if (inputArgs.hasArg(OPT_READONLY))
+    llvm::outs() << "has readonly flag\n";
+
+  llvm::outs().flush();
+  return 0;
+}