llvm/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 "ARCMCInstLower.h"
  16 #include "ARCSubtarget.h"
  17 #include "ARCTargetMachine.h"
  18 #include "MCTargetDesc/ARCInstPrinter.h"
  19 #include "TargetInfo/ARCTargetInfo.h"
  20 #include "llvm/CodeGen/AsmPrinter.h"
  21 #include "llvm/CodeGen/MachineInstr.h"
  22 #include "llvm/MC/MCAsmInfo.h"
  23 #include "llvm/MC/MCInst.h"
  24 #include "llvm/MC/MCStreamer.h"
  25 #include "llvm/Support/TargetRegistry.h"
  26 #include "llvm/Support/raw_ostream.h"
  27
  28 using namespace llvm;
  29
  30 #define DEBUG_TYPE "asm-printer"
  31
  32 namespace {
  33
  34 class ARCAsmPrinter : public AsmPrinter {
  35   ARCMCInstLower MCInstLowering;
  36
  37 public:
  38   explicit ARCAsmPrinter(TargetMachine &TM,
  39                          std::unique_ptr<MCStreamer> Streamer)
  40       : AsmPrinter(TM, std::move(Streamer)),
  41         MCInstLowering(&OutContext, *this) {}
  42
  43   StringRef getPassName() const override { return "ARC Assembly Printer"; }
  44   void emitInstruction(const MachineInstr *MI) override;
  45
  46   bool runOnMachineFunction(MachineFunction &MF) override;
  47 };
  48
  49 } // end anonymous namespace
  50
  51 void ARCAsmPrinter::emitInstruction(const MachineInstr *MI) {
  52   SmallString<128> Str;
  53   raw_svector_ostream O(Str);
  54
  55   switch (MI->getOpcode()) {
  56   case ARC::DBG_VALUE:
  57     llvm_unreachable("Should be handled target independently");
  58     break;
  59   }
  60
  61   MCInst TmpInst;
  62   MCInstLowering.Lower(MI, TmpInst);
  63   EmitToStreamer(*OutStreamer, TmpInst);
  64 }
  65
  66 bool ARCAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
  67   // Functions are 4-byte aligned.
  68   MF.ensureAlignment(Align(4));
  69   return AsmPrinter::runOnMachineFunction(MF);
  70 }
  71
  72 // Force static initialization.
  73 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeARCAsmPrinter() {
  74   RegisterAsmPrinter<ARCAsmPrinter> X(getTheARCTarget());
  75 }