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/MC/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 ARC_MC::verifyInstructionPredicates(MI->getOpcode(), 53 getSubtargetInfo().getFeatureBits()); 54 55 SmallString<128> Str; 56 raw_svector_ostream O(Str); 57 58 switch (MI->getOpcode()) { 59 case ARC::DBG_VALUE: 60 llvm_unreachable("Should be handled target independently"); 61 break; 62 } 63 64 MCInst TmpInst; 65 MCInstLowering.Lower(MI, TmpInst); 66 EmitToStreamer(*OutStreamer, TmpInst); 67 } 68 69 bool ARCAsmPrinter::runOnMachineFunction(MachineFunction &MF) { 70 // Functions are 4-byte aligned. 71 MF.ensureAlignment(Align(4)); 72 return AsmPrinter::runOnMachineFunction(MF); 73 } 74 75 // Force static initialization. 76 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeARCAsmPrinter() { 77 RegisterAsmPrinter<ARCAsmPrinter> X(getTheARCTarget()); 78 } 79