lib/Target/ARC/ARCAsmPrinter.cpp

   1 //===- ARCAsmPrinter.cpp - ARC LLVM assembly writer -------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file contains a printer that converts from our internal representation
  10 // of machine-dependent LLVM code to GNU format ARC assembly language.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "ARC.h"
  15 #include "ARCInstrInfo.h"
  16 #include "ARCMCInstLower.h"
  17 #include "ARCSubtarget.h"
  18 #include "ARCTargetMachine.h"
  19 #include "ARCTargetStreamer.h"
  20 #include "InstPrinter/ARCInstPrinter.h"
  21 #include "llvm/ADT/SmallString.h"
  22 #include "llvm/ADT/StringExtras.h"
  23 #include "llvm/CodeGen/AsmPrinter.h"
  24 #include "llvm/CodeGen/MachineFunctionPass.h"
  25 #include "llvm/CodeGen/MachineInstr.h"
  26 #include "llvm/CodeGen/MachineModuleInfo.h"
  27 #include "llvm/MC/MCAsmInfo.h"
  28 #include "llvm/MC/MCExpr.h"
  29 #include "llvm/MC/MCInst.h"
  30 #include "llvm/MC/MCStreamer.h"
  31 #include "llvm/MC/MCSymbolELF.h"
  32 #include "llvm/Support/ErrorHandling.h"
  33 #include "llvm/Support/TargetRegistry.h"
  34 #include "llvm/Support/raw_ostream.h"
  35 #include "llvm/Target/TargetLoweringObjectFile.h"
  36 #include <algorithm>
  37
  38 using namespace llvm;
  39
  40 #define DEBUG_TYPE "asm-printer"
  41
  42 namespace {
  43
  44 class ARCAsmPrinter : public AsmPrinter {
  45   ARCMCInstLower MCInstLowering;
  46   ARCTargetStreamer &getTargetStreamer();
  47
  48 public:
  49   explicit ARCAsmPrinter(TargetMachine &TM,
  50                          std::unique_ptr<MCStreamer> Streamer)
  51       : AsmPrinter(TM, std::move(Streamer)),
  52         MCInstLowering(&OutContext, *this) {}
  53
  54   StringRef getPassName() const override { return "ARC Assembly Printer"; }
  55   void EmitInstruction(const MachineInstr *MI) override;
  56 };
  57
  58 } // end anonymous namespace
  59
  60 ARCTargetStreamer &ARCAsmPrinter::getTargetStreamer() {
  61   return static_cast<ARCTargetStreamer &>(*OutStreamer->getTargetStreamer());
  62 }
  63
  64 void ARCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
  65   SmallString<128> Str;
  66   raw_svector_ostream O(Str);
  67
  68   switch (MI->getOpcode()) {
  69   case ARC::DBG_VALUE:
  70     llvm_unreachable("Should be handled target independently");
  71     break;
  72   }
  73
  74   MCInst TmpInst;
  75   MCInstLowering.Lower(MI, TmpInst);
  76   EmitToStreamer(*OutStreamer, TmpInst);
  77 }
  78
  79 // Force static initialization.
  80 extern "C" void LLVMInitializeARCAsmPrinter() {
  81   RegisterAsmPrinter<ARCAsmPrinter> X(getTheARCTarget());
  82 }