--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/Target/Nios2/Nios2TargetMachine.cpp	Fri Oct 27 17:07:41 2017 +0900
@@ -0,0 +1,97 @@
+//===-- Nios2TargetMachine.cpp - Define TargetMachine for Nios2 -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements the info about Nios2 target spec.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Nios2TargetMachine.h"
+#include "Nios2.h"
+
+#include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/Support/TargetRegistry.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "nios2"
+
+extern "C" void LLVMInitializeNios2Target() {
+  // Register the target.
+  RegisterTargetMachine<Nios2TargetMachine> X(getTheNios2Target());
+}
+
+static std::string computeDataLayout() {
+  return "e-p:32:32:32-i8:8:32-i16:16:32-n32";
+}
+
+static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
+  if (!RM.hasValue())
+    return Reloc::Static;
+  return *RM;
+}
+
+Nios2TargetMachine::Nios2TargetMachine(const Target &T, const Triple &TT,
+                                       StringRef CPU, StringRef FS,
+                                       const TargetOptions &Options,
+                                       Optional<Reloc::Model> RM,
+                                       Optional<CodeModel::Model> CM,
+                                       CodeGenOpt::Level OL, bool JIT)
+    : LLVMTargetMachine(T, computeDataLayout(), TT, CPU, FS, Options,
+                        getEffectiveRelocModel(RM), *CM, OL) {}
+
+Nios2TargetMachine::~Nios2TargetMachine() {}
+
+const Nios2Subtarget *
+Nios2TargetMachine::getSubtargetImpl(const Function &F) const {
+  Attribute CPUAttr = F.getFnAttribute("target-cpu");
+  Attribute FSAttr = F.getFnAttribute("target-features");
+
+  std::string CPU = !CPUAttr.hasAttribute(Attribute::None)
+                        ? CPUAttr.getValueAsString().str()
+                        : TargetCPU;
+  std::string FS = !FSAttr.hasAttribute(Attribute::None)
+                       ? FSAttr.getValueAsString().str()
+                       : TargetFS;
+
+  auto &I = SubtargetMap[CPU + FS];
+  if (!I) {
+    // This needs to be done before we create a new subtarget since any
+    // creation will depend on the TM and the code generation flags on the
+    // function that reside in TargetOptions.
+    resetTargetOptions(F);
+    I = llvm::make_unique<Nios2Subtarget>(TargetTriple, CPU, FS, *this);
+  }
+  return I.get();
+}
+
+namespace {
+/// Nios2 Code Generator Pass Configuration Options.
+class Nios2PassConfig : public TargetPassConfig {
+public:
+  Nios2PassConfig(Nios2TargetMachine &TM, PassManagerBase *PM)
+      : TargetPassConfig(TM, *PM) {}
+
+  Nios2TargetMachine &getNios2TargetMachine() const {
+    return getTM<Nios2TargetMachine>();
+  }
+
+  void addCodeGenPrepare() override;
+  void addIRPasses() override;
+};
+} // namespace
+
+TargetPassConfig *Nios2TargetMachine::createPassConfig(PassManagerBase &PM) {
+  return new Nios2PassConfig(*this, &PM);
+}
+
+void Nios2PassConfig::addCodeGenPrepare() {
+  TargetPassConfig::addCodeGenPrepare();
+}
+
+void Nios2PassConfig::addIRPasses() { TargetPassConfig::addIRPasses(); }