[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

14 files changed, 0 insertions, 755 deletions

diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/CMakeLists.txt b/llvm/lib/Target/Nios2/MCTargetDesc/CMakeLists.txt
deleted file mode 100644
index 138832d33ab..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/CMakeLists.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-#MCTargetDesc / CMakeLists.txt
-add_llvm_library(LLVMNios2Desc
-                 Nios2AsmBackend.cpp
-                 Nios2ELFObjectWriter.cpp
-                 Nios2MCAsmInfo.cpp
-                 Nios2MCExpr.cpp
-                 Nios2MCTargetDesc.cpp
-                 Nios2TargetStreamer.cpp)
-
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/LLVMBuild.txt b/llvm/lib/Target/Nios2/MCTargetDesc/LLVMBuild.txt
deleted file mode 100644
index 3794c83e504..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/LLVMBuild.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-;===- ./lib/Target/Nios2/MCTargetDesc/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 = Library
-name = Nios2Desc
-parent = Nios2
-required_libraries = MC
-                     Nios2AsmPrinter
-                     Nios2Info
-                     Support
-add_to_library_groups = Nios2
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2AsmBackend.cpp b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2AsmBackend.cpp
deleted file mode 100644
index 8ac08c6837d..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2AsmBackend.cpp
+++ /dev/null
@@ -1,130 +0,0 @@
-//===-- Nios2AsmBackend.cpp - Nios2 Asm Backend  --------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the Nios2AsmBackend class.
-//
-//===----------------------------------------------------------------------===//
-//
-
-#include "MCTargetDesc/Nios2AsmBackend.h"
-#include "MCTargetDesc/Nios2FixupKinds.h"
-#include "MCTargetDesc/Nios2MCTargetDesc.h"
-#include "llvm/MC/MCAssembler.h"
-#include "llvm/MC/MCELFObjectWriter.h"
-#include "llvm/MC/MCFixupKindInfo.h"
-#include "llvm/MC/MCObjectWriter.h"
-#include "llvm/MC/MCSubtargetInfo.h"
-
-using namespace llvm;
-
-// Prepare value for the target space for it
-static unsigned adjustFixupValue(const MCFixup &Fixup, uint64_t Value) {
-
-  unsigned Kind = Fixup.getKind();
-
-  // Add/subtract and shift
-  switch (Kind) {
-  default:
-    return 0;
-  case Nios2::fixup_Nios2_LO16:
-    break;
-  case Nios2::fixup_Nios2_HI16:
-    // Get the higher 16-bits. Also add 1 if bit 15 is 1.
-    Value = ((Value + 0x8000) >> 16) & 0xffff;
-    break;
-  }
-
-  return Value;
-}
-
-// Calculate index for Nios2 specific little endian byte order
-static unsigned calculateLEIndex(unsigned i) {
-  assert(i <= 3 && "Index out of range!");
-
-  return (1 - i / 2) * 2 + i % 2;
-}
-
-/// ApplyFixup - Apply the \p Value for given \p Fixup into the provided
-/// data fragment, at the offset specified by the fixup and following the
-/// fixup kind as appropriate.
-void Nios2AsmBackend::applyFixup(const MCAssembler &Asm, const MCFixup &Fixup,
-                                 const MCValue &Target,
-                                 MutableArrayRef<char> Data, uint64_t Value,
-                                 bool IsResolved) const {
-  MCFixupKind Kind = Fixup.getKind();
-  Value = adjustFixupValue(Fixup, Value);
-
-  if (!Value)
-    return; // Doesn't change encoding.
-
-  // Where do we start in the object
-  unsigned Offset = Fixup.getOffset();
-  // Number of bytes we need to fixup
-  unsigned NumBytes = (getFixupKindInfo(Kind).TargetSize + 7) / 8;
-  // Grab current value, if any, from bits.
-  uint64_t CurVal = 0;
-
-  for (unsigned i = 0; i != NumBytes; ++i) {
-    unsigned Idx = calculateLEIndex(i);
-    CurVal |= (uint64_t)((uint8_t)Data[Offset + Idx]) << (i * 8);
-  }
-
-  uint64_t Mask = ((uint64_t)(-1) >> (64 - getFixupKindInfo(Kind).TargetSize));
-  CurVal |= Value & Mask;
-
-  // Write out the fixed up bytes back to the code/data bits.
-  for (unsigned i = 0; i != NumBytes; ++i) {
-    unsigned Idx = calculateLEIndex(i);
-    Data[Offset + Idx] = (uint8_t)((CurVal >> (i * 8)) & 0xff);
-  }
-}
-
-Optional<MCFixupKind> Nios2AsmBackend::getFixupKind(StringRef Name) const {
-  return StringSwitch<Optional<MCFixupKind>>(Name)
-      .Case("R_NIOS2_NONE", (MCFixupKind)Nios2::fixup_Nios2_32)
-      .Case("R_NIOS2_32", FK_Data_4)
-      .Default(MCAsmBackend::getFixupKind(Name));
-}
-
-//@getFixupKindInfo {
-const MCFixupKindInfo &
-Nios2AsmBackend::getFixupKindInfo(MCFixupKind Kind) const {
-  const static MCFixupKindInfo Infos[Nios2::NumTargetFixupKinds] = {
-      // This table *must* be in same the order of fixup_* kinds in
-      // Nios2FixupKinds.h.
-      //
-      // name                        offset  bits  flags
-      {"fixup_Nios2_32", 0, 32, 0},
-      {"fixup_Nios2_HI16", 0, 16, 0},
-      {"fixup_Nios2_LO16", 0, 16, 0}};
-
-  if (Kind < FirstTargetFixupKind)
-    return MCAsmBackend::getFixupKindInfo(Kind);
-
-  assert(unsigned(Kind - FirstTargetFixupKind) < getNumFixupKinds() &&
-         "Invalid kind!");
-  return Infos[Kind - FirstTargetFixupKind];
-}
-
-std::unique_ptr<MCObjectTargetWriter>
-Nios2AsmBackend::createObjectTargetWriter() const {
-  return createNios2ELFObjectWriter(MCELFObjectTargetWriter::getOSABI(OSType));
-}
-
-bool Nios2AsmBackend::writeNopData(raw_ostream &OS, uint64_t Count) const {
-  return true;
-}
-
-// MCAsmBackend
-MCAsmBackend *llvm::createNios2AsmBackend(const Target &T,
-                                          const MCSubtargetInfo &STI,
-                                          const MCRegisterInfo &MRI,
-                                          const MCTargetOptions &Options) {
-  return new Nios2AsmBackend(T, STI.getTargetTriple().getOS());
-}
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2AsmBackend.h b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2AsmBackend.h
deleted file mode 100644
index 1f114bd869b..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2AsmBackend.h
+++ /dev/null
@@ -1,81 +0,0 @@
-//===-- Nios2AsmBackend.h - Nios2 Asm Backend  ----------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines the Nios2AsmBackend class.
-//
-//===----------------------------------------------------------------------===//
-//
-
-#ifndef LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2ASMBACKEND_H
-#define LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2ASMBACKEND_H
-
-#include "MCTargetDesc/Nios2FixupKinds.h"
-#include "llvm/ADT/Triple.h"
-#include "llvm/MC/MCAsmBackend.h"
-
-namespace llvm {
-
-class MCAssembler;
-struct MCFixupKindInfo;
-class Target;
-class MCObjectWriter;
-
-class Nios2AsmBackend : public MCAsmBackend {
-  Triple::OSType OSType;
-
-public:
-  Nios2AsmBackend(const Target &T, Triple::OSType OSType)
-      : MCAsmBackend(support::little), OSType(OSType) {}
-
-  std::unique_ptr<MCObjectTargetWriter>
-  createObjectTargetWriter() const override;
-
-  bool writeNopData(raw_ostream &OS, uint64_t Count) const override;
-
-  void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup,
-                  const MCValue &Target, MutableArrayRef<char> Data,
-                  uint64_t Value, bool IsResolved) const override;
-
-  Optional<MCFixupKind> getFixupKind(StringRef Name) const override;
-  const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
-
-  unsigned getNumFixupKinds() const override {
-    return Nios2::NumTargetFixupKinds;
-  }
-
-  /// MayNeedRelaxation - Check whether the given instruction may need
-  /// relaxation.
-  ///
-  /// \param Inst - The instruction to test.
-  bool mayNeedRelaxation(const MCInst &Inst) const override { return false; }
-
-  /// fixupNeedsRelaxation - Target specific predicate for whether a given
-  /// fixup requires the associated instruction to be relaxed.
-  bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
-                            const MCRelaxableFragment *DF,
-                            const MCAsmLayout &Layout) const override {
-    // FIXME.
-    llvm_unreachable("RelaxInstruction() unimplemented");
-    return false;
-  }
-
-  /// RelaxInstruction - Relax the instruction in the given fragment
-  /// to the next wider instruction.
-  ///
-  /// \param Inst - The instruction to relax, which may be the same
-  /// as the output.
-  /// \param [out] Res On return, the relaxed instruction.
-  void relaxInstruction(const MCInst &Inst, const MCSubtargetInfo &STI,
-                        MCInst &Res) const override {}
-
-}; // class Nios2AsmBackend
-
-} // namespace llvm
-
-#endif
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2BaseInfo.h b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2BaseInfo.h
deleted file mode 100644
index 225671ebc8d..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2BaseInfo.h
+++ /dev/null
@@ -1,38 +0,0 @@
-//===-- Nios2BaseInfo.h - Top level definitions for NIOS2 MC ----*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains small standalone helper functions and enum definitions for
-// the Nios2 target useful for the compiler back-end and the MC libraries.
-//
-//===----------------------------------------------------------------------===//
-#ifndef LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2BASEINFO_H
-#define LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2BASEINFO_H
-
-namespace llvm {
-
-/// Nios2FG - This namespace holds all of the target specific flags that
-/// instruction info tracks.
-namespace Nios2FG {
-/// Target Operand Flag enum.
-enum TOF {
-  //===------------------------------------------------------------------===//
-  // Nios2 Specific MachineOperand flags.
-
-  MO_NO_FLAG,
-
-  /// MO_ABS_HI/LO - Represents the hi or low part of an absolute symbol
-  /// address.
-  MO_ABS_HI,
-  MO_ABS_LO,
-
-};
-} // namespace Nios2FG
-} // namespace llvm
-
-#endif
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2ELFObjectWriter.cpp b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2ELFObjectWriter.cpp
deleted file mode 100644
index db432d15120..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2ELFObjectWriter.cpp
+++ /dev/null
@@ -1,43 +0,0 @@
-//===-- Nios2ELFObjectWriter.cpp - Nios2 ELF Writer -----------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "MCTargetDesc/Nios2FixupKinds.h"
-#include "MCTargetDesc/Nios2MCExpr.h"
-#include "MCTargetDesc/Nios2MCTargetDesc.h"
-#include "llvm/MC/MCELFObjectWriter.h"
-#include "llvm/MC/MCObjectWriter.h"
-
-using namespace llvm;
-
-namespace {
-class Nios2ELFObjectWriter : public MCELFObjectTargetWriter {
-public:
-  Nios2ELFObjectWriter(uint8_t OSABI)
-      : MCELFObjectTargetWriter(false, OSABI, ELF::EM_ALTERA_NIOS2, false) {}
-
-  ~Nios2ELFObjectWriter() override;
-
-  unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
-                        const MCFixup &Fixup, bool IsPCRel) const override;
-};
-} // namespace
-
-Nios2ELFObjectWriter::~Nios2ELFObjectWriter() {}
-
-unsigned Nios2ELFObjectWriter::getRelocType(MCContext &Ctx,
-                                            const MCValue &Target,
-                                            const MCFixup &Fixup,
-                                            bool IsPCRel) const {
-  return 0;
-}
-
-std::unique_ptr<MCObjectTargetWriter>
-llvm::createNios2ELFObjectWriter(uint8_t OSABI) {
-  return llvm::make_unique<Nios2ELFObjectWriter>(OSABI);
-}
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2FixupKinds.h b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2FixupKinds.h
deleted file mode 100644
index c169a1b1937..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2FixupKinds.h
+++ /dev/null
@@ -1,41 +0,0 @@
-//===-- Nios2FixupKinds.h - Nios2 Specific Fixup Entries --------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2FIXUPKINDS_H
-#define LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2FIXUPKINDS_H
-
-#include "llvm/MC/MCFixup.h"
-
-namespace llvm {
-namespace Nios2 {
-// Although most of the current fixup types reflect a unique relocation
-// one can have multiple fixup types for a given relocation and thus need
-// to be uniquely named.
-//
-// This table *must* be in the save order of
-// MCFixupKindInfo Infos[Nios2::NumTargetFixupKinds]
-// in Nios2AsmBackend.cpp.
-enum Fixups {
-  // Pure upper 32 bit fixup resulting in - R_NIOS2_32.
-  fixup_Nios2_32 = FirstTargetFixupKind,
-
-  // Pure upper 16 bit fixup resulting in - R_NIOS2_HI16.
-  fixup_Nios2_HI16,
-
-  // Pure lower 16 bit fixup resulting in - R_NIOS2_LO16.
-  fixup_Nios2_LO16,
-
-  // Marker
-  LastTargetFixupKind,
-  NumTargetFixupKinds = LastTargetFixupKind - FirstTargetFixupKind
-};
-} // namespace Nios2
-} // namespace llvm
-
-#endif // LLVM_NIOS2_NIOS2FIXUPKINDS_H
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCAsmInfo.cpp b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCAsmInfo.cpp
deleted file mode 100644
index e3c66e6776c..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCAsmInfo.cpp
+++ /dev/null
@@ -1,44 +0,0 @@
-//===-- Nios2MCAsmInfo.cpp - Nios2 Asm Properties -------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains the declarations of the Nios2MCAsmInfo properties.
-//
-//===----------------------------------------------------------------------===//
-
-#include "Nios2MCAsmInfo.h"
-
-#include "llvm/ADT/Triple.h"
-
-using namespace llvm;
-
-void Nios2MCAsmInfo::anchor() {}
-
-Nios2MCAsmInfo::Nios2MCAsmInfo(const Triple &TheTriple) {
-  if ((TheTriple.getArch() == Triple::nios2))
-    IsLittleEndian = true; // the default of IsLittleEndian is true
-
-  AlignmentIsInBytes = false;
-  Data16bitsDirective = "\t.2byte\t";
-  Data32bitsDirective = "\t.4byte\t";
-  Data64bitsDirective = "\t.8byte\t";
-  PrivateLabelPrefix = ".LC";
-  CommentString = "#";
-  ZeroDirective = "\t.space\t";
-  GPRel32Directive = "\t.gpword\t";
-  GPRel64Directive = "\t.gpdword\t";
-  WeakRefDirective = "\t.weak\t";
-  GlobalDirective = "\t.global\t";
-  AscizDirective = "\t.string\t";
-  UseAssignmentForEHBegin = true;
-
-  SupportsDebugInformation = true;
-  ExceptionsType = ExceptionHandling::DwarfCFI;
-  DwarfRegNumForCFI = true;
-  UsesELFSectionDirectiveForBSS = true;
-}
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCAsmInfo.h b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCAsmInfo.h
deleted file mode 100644
index 0c81276f84d..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCAsmInfo.h
+++ /dev/null
@@ -1,31 +0,0 @@
-//===-- Nios2MCAsmInfo.h - Nios2 Asm 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 contains the declaration of the Nios2MCAsmInfo class.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2MCASMINFO_H
-#define LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2MCASMINFO_H
-
-#include "llvm/MC/MCAsmInfoELF.h"
-
-namespace llvm {
-class Triple;
-
-class Nios2MCAsmInfo : public MCAsmInfoELF {
-  void anchor() override;
-
-public:
-  explicit Nios2MCAsmInfo(const Triple &TheTriple);
-};
-
-} // namespace llvm
-
-#endif
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCExpr.cpp b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCExpr.cpp
deleted file mode 100644
index 0f12c9e9337..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCExpr.cpp
+++ /dev/null
@@ -1,76 +0,0 @@
-//===-- Nios2MCExpr.cpp - Nios2 specific MC expression classes ------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "Nios2.h"
-
-#include "Nios2MCExpr.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCAssembler.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCObjectStreamer.h"
-#include "llvm/MC/MCSymbolELF.h"
-
-using namespace llvm;
-
-#define DEBUG_TYPE "nios2mcexpr"
-
-const Nios2MCExpr *Nios2MCExpr::create(Nios2MCExpr::Nios2ExprKind Kind,
-                                       const MCExpr *Expr, MCContext &Ctx) {
-  return new (Ctx) Nios2MCExpr(Kind, Expr);
-}
-
-const Nios2MCExpr *Nios2MCExpr::create(const MCSymbol *Symbol,
-                                       Nios2MCExpr::Nios2ExprKind Kind,
-                                       MCContext &Ctx) {
-  const MCSymbolRefExpr *MCSym =
-      MCSymbolRefExpr::create(Symbol, MCSymbolRefExpr::VK_None, Ctx);
-  return new (Ctx) Nios2MCExpr(Kind, MCSym);
-}
-
-void Nios2MCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
-
-  switch (Kind) {
-  case CEK_None:
-  case CEK_Special:
-    llvm_unreachable("CEK_None and CEK_Special are invalid");
-    break;
-  case CEK_ABS_HI:
-    OS << "%hiadj";
-    break;
-  case CEK_ABS_LO:
-    OS << "%lo";
-    break;
-  }
-
-  OS << '(';
-  Expr->print(OS, MAI, true);
-  OS << ')';
-}
-
-bool Nios2MCExpr::evaluateAsRelocatableImpl(MCValue &Res,
-                                            const MCAsmLayout *Layout,
-                                            const MCFixup *Fixup) const {
-  return getSubExpr()->evaluateAsRelocatable(Res, Layout, Fixup);
-}
-
-void Nios2MCExpr::visitUsedExpr(MCStreamer &Streamer) const {
-  Streamer.visitUsedExpr(*getSubExpr());
-}
-
-void Nios2MCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
-  switch (getKind()) {
-  case CEK_None:
-  case CEK_Special:
-    llvm_unreachable("CEK_None and CEK_Special are invalid");
-    break;
-  case CEK_ABS_HI:
-  case CEK_ABS_LO:
-    break;
-  }
-}
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCExpr.h b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCExpr.h
deleted file mode 100644
index 5b49005eb64..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCExpr.h
+++ /dev/null
@@ -1,60 +0,0 @@
-//===-- Nios2MCExpr.h - Nios2 specific MC expression classes ----*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2MCEXPR_H
-#define LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2MCEXPR_H
-
-#include "llvm/MC/MCAsmLayout.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCValue.h"
-
-namespace llvm {
-
-class Nios2MCExpr : public MCTargetExpr {
-public:
-  enum Nios2ExprKind {
-    CEK_None,
-    CEK_ABS_HI,
-    CEK_ABS_LO,
-    CEK_Special,
-  };
-
-private:
-  const Nios2ExprKind Kind;
-  const MCExpr *Expr;
-
-  explicit Nios2MCExpr(Nios2ExprKind Kind, const MCExpr *Expr)
-      : Kind(Kind), Expr(Expr) {}
-
-public:
-  static const Nios2MCExpr *create(Nios2ExprKind Kind, const MCExpr *Expr,
-                                   MCContext &Ctx);
-  static const Nios2MCExpr *create(const MCSymbol *Symbol,
-                                   Nios2MCExpr::Nios2ExprKind Kind,
-                                   MCContext &Ctx);
-
-  /// Get the kind of this expression.
-  Nios2ExprKind getKind() const { return Kind; }
-
-  /// Get the child of this expression.
-  const MCExpr *getSubExpr() const { return Expr; }
-
-  void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
-  bool evaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout,
-                                 const MCFixup *Fixup) const override;
-  void visitUsedExpr(MCStreamer &Streamer) const override;
-  MCFragment *findAssociatedFragment() const override {
-    return getSubExpr()->findAssociatedFragment();
-  }
-
-  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override;
-};
-} // end namespace llvm
-
-#endif
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCTargetDesc.cpp b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCTargetDesc.cpp
deleted file mode 100644
index e57b44d3cfd..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCTargetDesc.cpp
+++ /dev/null
@@ -1,102 +0,0 @@
-//===-- Nios2MCTargetDesc.cpp - Nios2 Target Descriptions -----------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file provides Nios2 specific target descriptions.
-//
-//===----------------------------------------------------------------------===//
-
-#include "Nios2MCTargetDesc.h"
-#include "InstPrinter/Nios2InstPrinter.h"
-#include "Nios2MCAsmInfo.h"
-#include "Nios2TargetStreamer.h"
-#include "llvm/MC/MCInstrInfo.h"
-#include "llvm/MC/MCRegisterInfo.h"
-#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/Support/TargetRegistry.h"
-
-using namespace llvm;
-
-#define GET_INSTRINFO_MC_DESC
-#include "Nios2GenInstrInfo.inc"
-
-#define GET_SUBTARGETINFO_MC_DESC
-#include "Nios2GenSubtargetInfo.inc"
-
-#define GET_REGINFO_MC_DESC
-#include "Nios2GenRegisterInfo.inc"
-
-static MCInstrInfo *createNios2MCInstrInfo() {
-  MCInstrInfo *X = new MCInstrInfo();
-  InitNios2MCInstrInfo(X); // defined in Nios2GenInstrInfo.inc
-  return X;
-}
-
-static MCRegisterInfo *createNios2MCRegisterInfo(const Triple &TT) {
-  MCRegisterInfo *X = new MCRegisterInfo();
-  InitNios2MCRegisterInfo(X, Nios2::R15); // defined in Nios2GenRegisterInfo.inc
-  return X;
-}
-
-static MCSubtargetInfo *
-createNios2MCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
-  if (CPU.empty() || CPU == "generic")
-    CPU = "nios2r1";
-  return createNios2MCSubtargetInfoImpl(TT, CPU, FS);
-  // createNios2MCSubtargetInfoImpl defined in Nios2GenSubtargetInfo.inc
-}
-
-static MCAsmInfo *createNios2MCAsmInfo(const MCRegisterInfo &MRI,
-                                       const Triple &TT) {
-  MCAsmInfo *MAI = new Nios2MCAsmInfo(TT);
-
-  unsigned SP = MRI.getDwarfRegNum(Nios2::SP, true);
-  MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, SP, 0);
-  MAI->addInitialFrameState(Inst);
-
-  return MAI;
-}
-
-static MCInstPrinter *createNios2MCInstPrinter(const Triple &T,
-                                               unsigned SyntaxVariant,
-                                               const MCAsmInfo &MAI,
-                                               const MCInstrInfo &MII,
-                                               const MCRegisterInfo &MRI) {
-  return new Nios2InstPrinter(MAI, MII, MRI);
-}
-
-static MCTargetStreamer *createNios2AsmTargetStreamer(MCStreamer &S,
-                                                      formatted_raw_ostream &OS,
-                                                      MCInstPrinter *InstPrint,
-                                                      bool isVerboseAsm) {
-  return new Nios2TargetAsmStreamer(S, OS);
-}
-
-extern "C" void LLVMInitializeNios2TargetMC() {
-  Target *T = &getTheNios2Target();
-
-  // Register the MC asm info.
-  RegisterMCAsmInfoFn X(*T, createNios2MCAsmInfo);
-
-  // Register the MC instruction info.
-  TargetRegistry::RegisterMCInstrInfo(*T, createNios2MCInstrInfo);
-
-  // Register the MC register info.
-  TargetRegistry::RegisterMCRegInfo(*T, createNios2MCRegisterInfo);
-
-  // Register the asm target streamer.
-  TargetRegistry::RegisterAsmTargetStreamer(*T, createNios2AsmTargetStreamer);
-
-  // Register the MC subtarget info.
-  TargetRegistry::RegisterMCSubtargetInfo(*T, createNios2MCSubtargetInfo);
-  // Register the MCInstPrinter.
-  TargetRegistry::RegisterMCInstPrinter(*T, createNios2MCInstPrinter);
-
-  // Register the asm backend.
-  TargetRegistry::RegisterMCAsmBackend(*T, createNios2AsmBackend);
-}
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCTargetDesc.h b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCTargetDesc.h
deleted file mode 100644
index a7c4b16c6a3..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2MCTargetDesc.h
+++ /dev/null
@@ -1,52 +0,0 @@
-//===-- Nios2MCTargetDesc.h - Nios2 Target Descriptions ---------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file provides Nios2 specific target descriptions.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2MCTARGETDESC_H
-#define LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2MCTARGETDESC_H
-
-#include <memory>
-
-namespace llvm {
-class MCAsmBackend;
-class MCObjectTargetWriter;
-class MCRegisterInfo;
-class MCSubtargetInfo;
-class MCTargetOptions;
-class Target;
-class Triple;
-class StringRef;
-class raw_pwrite_stream;
-
-Target &getTheNios2Target();
-
-MCAsmBackend *createNios2AsmBackend(const Target &T, const MCSubtargetInfo &STI,
-                                    const MCRegisterInfo &MRI,
-                                    const MCTargetOptions &Options);
-
-std::unique_ptr<MCObjectTargetWriter> createNios2ELFObjectWriter(uint8_t OSABI);
-
-} // namespace llvm
-
-// Defines symbolic names for Nios2 registers.  This defines a mapping from
-// register name to register number.
-#define GET_REGINFO_ENUM
-#include "Nios2GenRegisterInfo.inc"
-
-// Defines symbolic names for the Nios2 instructions.
-#define GET_INSTRINFO_ENUM
-#include "Nios2GenInstrInfo.inc"
-
-#define GET_SUBTARGETINFO_ENUM
-#include "Nios2GenSubtargetInfo.inc"
-
-#endif
diff --git a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2TargetStreamer.cpp b/llvm/lib/Target/Nios2/MCTargetDesc/Nios2TargetStreamer.cpp
deleted file mode 100644
index 795fd0084aa..00000000000
--- a/llvm/lib/Target/Nios2/MCTargetDesc/Nios2TargetStreamer.cpp
+++ /dev/null
@@ -1,22 +0,0 @@
-//===-- Nios2TargetStreamer.cpp - Nios2 Target Streamer Methods -----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file provides Nios2 specific target streamer methods.
-//
-//===----------------------------------------------------------------------===//
-
-#include "Nios2TargetStreamer.h"
-
-using namespace llvm;
-
-Nios2TargetStreamer::Nios2TargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
-
-Nios2TargetAsmStreamer::Nios2TargetAsmStreamer(MCStreamer &S,
-                                               formatted_raw_ostream &OS)
-    : Nios2TargetStreamer(S) {}