86 lines · 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-exception6//7//===----------------------------------------------------------------------===//8//9// This file contains a printer that converts from our internal representation10// 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/MC/TargetRegistry.h"26#include "llvm/Support/raw_ostream.h"27 28using namespace llvm;29 30#define DEBUG_TYPE "asm-printer"31 32namespace {33 34class ARCAsmPrinter : public AsmPrinter {35 ARCMCInstLower MCInstLowering;36 37public:38 static char ID;39 40 explicit ARCAsmPrinter(TargetMachine &TM,41 std::unique_ptr<MCStreamer> Streamer)42 : AsmPrinter(TM, std::move(Streamer), ID),43 MCInstLowering(&OutContext, *this) {}44 45 StringRef getPassName() const override { return "ARC Assembly Printer"; }46 void emitInstruction(const MachineInstr *MI) override;47 48 bool runOnMachineFunction(MachineFunction &MF) override;49};50 51} // end anonymous namespace52 53void ARCAsmPrinter::emitInstruction(const MachineInstr *MI) {54 ARC_MC::verifyInstructionPredicates(MI->getOpcode(),55 getSubtargetInfo().getFeatureBits());56 57 SmallString<128> Str;58 raw_svector_ostream O(Str);59 60 switch (MI->getOpcode()) {61 case ARC::DBG_VALUE:62 llvm_unreachable("Should be handled target independently");63 break;64 }65 66 MCInst TmpInst;67 MCInstLowering.Lower(MI, TmpInst);68 EmitToStreamer(*OutStreamer, TmpInst);69}70 71bool ARCAsmPrinter::runOnMachineFunction(MachineFunction &MF) {72 // Functions are 4-byte aligned.73 MF.ensureAlignment(Align(4));74 return AsmPrinter::runOnMachineFunction(MF);75}76 77char ARCAsmPrinter::ID = 0;78 79INITIALIZE_PASS(ARCAsmPrinter, "arc-asm-printer", "ARC Assmebly Printer", false,80 false)81 82// Force static initialization.83extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeARCAsmPrinter() {84 RegisterAsmPrinter<ARCAsmPrinter> X(getTheARCTarget());85}86