[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, 153 deletions

diff --git a/llvm/lib/Target/Nios2/Nios2AsmPrinter.cpp b/llvm/lib/Target/Nios2/Nios2AsmPrinter.cpp
deleted file mode 100644
index 1abf1959177..00000000000
--- a/llvm/lib/Target/Nios2/Nios2AsmPrinter.cpp
+++ /dev/null
@@ -1,153 +0,0 @@
-//===-- Nios2AsmPrinter.cpp - Nios2 LLVM Assembly Printer -----------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains a printer that converts from our internal representation
-// of machine-dependent LLVM code to GAS-format NIOS2 assembly language.
-//
-//===----------------------------------------------------------------------===//
-
-#include "InstPrinter/Nios2InstPrinter.h"
-#include "MCTargetDesc/Nios2BaseInfo.h"
-#include "Nios2.h"
-#include "Nios2TargetMachine.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/Support/TargetRegistry.h"
-
-using namespace llvm;
-
-#define DEBUG_TYPE "nios2-asm-printer"
-
-namespace {
-
-class Nios2AsmPrinter : public AsmPrinter {
-
-public:
-  explicit Nios2AsmPrinter(TargetMachine &TM,
-                           std::unique_ptr<MCStreamer> Streamer)
-      : AsmPrinter(TM, std::move(Streamer)) {}
-
-  StringRef getPassName() const override { return "Nios2 Assembly Printer"; }
-
-  //- EmitInstruction() must exists or will have run time error.
-  void EmitInstruction(const MachineInstr *MI) override;
-  bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
-                       unsigned AsmVariant, const char *ExtraCode,
-                       raw_ostream &O) override;
-  bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
-                             unsigned AsmVariant, const char *ExtraCode,
-                             raw_ostream &O) override;
-  void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
-  void EmitFunctionEntryLabel() override;
-};
-} // namespace
-
-//- EmitInstruction() must exists or will have run time error.
-void Nios2AsmPrinter::EmitInstruction(const MachineInstr *MI) {
-
-  //  Print out both ordinary instruction and boudle instruction
-  MachineBasicBlock::const_instr_iterator I = MI->getIterator();
-  MachineBasicBlock::const_instr_iterator E = MI->getParent()->instr_end();
-
-  do {
-
-    if (I->isPseudo()) {
-      llvm_unreachable("Pseudo opcode found in EmitInstruction()");
-    }
-
-    MCInst TmpInst0;
-    LowerNios2MachineInstToMCInst(&*I, TmpInst0, *this);
-    EmitToStreamer(*OutStreamer, TmpInst0);
-  } while ((++I != E) && I->isInsideBundle()); // Delay slot check
-}
-
-//		.type	main,@function
-//->		.ent	main                    # @main
-//	main:
-void Nios2AsmPrinter::EmitFunctionEntryLabel() {
-  OutStreamer->EmitLabel(CurrentFnSym);
-}
-
-// Print out an operand for an inline asm expression.
-bool Nios2AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
-                                      unsigned AsmVariant,
-                                      const char *ExtraCode, raw_ostream &O) {
-  printOperand(MI, OpNum, O);
-  return false;
-}
-
-bool Nios2AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
-                                            unsigned OpNum, unsigned AsmVariant,
-                                            const char *ExtraCode,
-                                            raw_ostream &O) {
-  if (ExtraCode && ExtraCode[0])
-    return true; // Unknown modifier
-
-  const MachineOperand &MO = MI->getOperand(OpNum);
-  assert(MO.isReg() && "unexpected inline asm memory operand");
-  O << "($" << Nios2InstPrinter::getRegisterName(MO.getReg()) << ")";
-
-  return false;
-}
-
-void Nios2AsmPrinter::printOperand(const MachineInstr *MI, int opNum,
-                                   raw_ostream &O) {
-  const MachineOperand &MO = MI->getOperand(opNum);
-  bool closeP = false;
-
-  if (MO.getTargetFlags())
-    closeP = true;
-
-  switch (MO.getTargetFlags()) {
-  case Nios2FG::MO_ABS_HI:
-    O << "%hiadj(";
-    break;
-  case Nios2FG::MO_ABS_LO:
-    O << "%lo(";
-    break;
-  }
-
-  switch (MO.getType()) {
-  case MachineOperand::MO_Register:
-    O << '$'
-      << StringRef(Nios2InstPrinter::getRegisterName(MO.getReg())).lower();
-    break;
-
-  case MachineOperand::MO_Immediate:
-    O << MO.getImm();
-    break;
-
-  case MachineOperand::MO_MachineBasicBlock:
-    MO.getMBB()->getSymbol()->print(O, MAI);
-    return;
-
-  case MachineOperand::MO_GlobalAddress:
-    getSymbol(MO.getGlobal())->print(O, MAI);
-    break;
-
-  case MachineOperand::MO_BlockAddress:
-    O << GetBlockAddressSymbol(MO.getBlockAddress())->getName();
-    break;
-
-  case MachineOperand::MO_ExternalSymbol:
-    O << MO.getSymbolName();
-    break;
-
-  default:
-    llvm_unreachable("<unknown operand type>");
-  }
-
-  if (closeP)
-    O << ")";
-}
-
-// Force static initialization.
-extern "C" void LLVMInitializeNios2AsmPrinter() {
-  RegisterAsmPrinter<Nios2AsmPrinter> X(getTheNios2Target());
-}