[Nios2] Remove Nios2 backend

As mentioned here http://lists.llvm.org/pipermail/llvm-dev/2019-January/129121.html This backend is incomplete and has not been maintained in several months.

Differential Revision: https://reviews.llvm.org/D56691

llvm-svn: 351231

1 files changed, 0 insertions, 97 deletions

diff --git a/llvm/lib/Target/Nios2/Nios2Subtarget.h b/llvm/lib/Target/Nios2/Nios2Subtarget.h
deleted file mode 100644
index a822dff33b5..00000000000
--- a/llvm/lib/Target/Nios2/Nios2Subtarget.h
+++ /dev/null
@@ -1,97 +0,0 @@
-//===-- Nios2Subtarget.h - Define Subtarget for the Nios2 -------*- 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 the Nios2 specific subclass of TargetSubtargetInfo.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIB_TARGET_NIOS2_NIOS2SUBTARGET_H
-#define LLVM_LIB_TARGET_NIOS2_NIOS2SUBTARGET_H
-
-#include "Nios2FrameLowering.h"
-#include "Nios2ISelLowering.h"
-#include "Nios2InstrInfo.h"
-#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
-#include "llvm/CodeGen/TargetFrameLowering.h"
-#include "llvm/CodeGen/TargetSubtargetInfo.h"
-
-#define GET_SUBTARGETINFO_HEADER
-#include "Nios2GenSubtargetInfo.inc"
-
-namespace llvm {
-class StringRef;
-
-class Nios2TargetMachine;
-
-class Nios2Subtarget : public Nios2GenSubtargetInfo {
-  virtual void anchor();
-
-public:
-  // Nios2 R2 features
-  // Bit manipulation instructions extension
-  bool HasBMX;
-  // Code Density instructions extension
-  bool HasCDX;
-  // Multi-Processor instructions extension
-  bool HasMPX;
-  // New mandatory instructions
-  bool HasR2Mandatory;
-
-protected:
-  enum Nios2ArchEnum {
-    // Nios2 R1 ISA
-    Nios2r1,
-    // Nios2 R2 ISA
-    Nios2r2
-  };
-
-  // Nios2 architecture version
-  Nios2ArchEnum Nios2ArchVersion;
-
-  Triple TargetTriple;
-
-  Nios2InstrInfo InstrInfo;
-  Nios2TargetLowering TLInfo;
-  SelectionDAGTargetInfo TSInfo;
-  Nios2FrameLowering FrameLowering;
-
-public:
-  /// This constructor initializes the data members to match that
-  /// of the specified triple.
-  Nios2Subtarget(const Triple &TT, const std::string &CPU,
-                 const std::string &FS, const TargetMachine &TM);
-
-  /// ParseSubtargetFeatures - Parses features string setting specified
-  /// subtarget options.  Definition of function is auto generated by tblgen.
-  void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
-
-  bool hasNios2r1() const { return Nios2ArchVersion >= Nios2r1; }
-  bool isNios2r1() const { return Nios2ArchVersion == Nios2r1; }
-  bool hasNios2r2() const { return Nios2ArchVersion >= Nios2r2; }
-  bool isNios2r2() const { return Nios2ArchVersion == Nios2r2; }
-
-  Nios2Subtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS);
-
-  const Nios2InstrInfo *getInstrInfo() const override { return &InstrInfo; }
-  const TargetFrameLowering *getFrameLowering() const override {
-    return &FrameLowering;
-  }
-  const Nios2RegisterInfo *getRegisterInfo() const override {
-    return &InstrInfo.getRegisterInfo();
-  }
-  const Nios2TargetLowering *getTargetLowering() const override {
-    return &TLInfo;
-  }
-  const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
-    return &TSInfo;
-  }
-};
-} // namespace llvm
-
-#endif