1 //===-- CSKYAsmPrinter.cpp - CSKY LLVM assembly writer --------------------===// 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 the CSKY assembly language. 11 // 12 //===----------------------------------------------------------------------===// 13 #include "CSKYAsmPrinter.h" 14 #include "CSKY.h" 15 #include "CSKYTargetMachine.h" 16 #include "MCTargetDesc/CSKYInstPrinter.h" 17 #include "MCTargetDesc/CSKYMCExpr.h" 18 #include "TargetInfo/CSKYTargetInfo.h" 19 #include "llvm/ADT/Statistic.h" 20 #include "llvm/CodeGen/AsmPrinter.h" 21 #include "llvm/CodeGen/MachineConstantPool.h" 22 #include "llvm/IR/DataLayout.h" 23 #include "llvm/MC/MCAsmInfo.h" 24 #include "llvm/MC/MCContext.h" 25 #include "llvm/MC/MCInstBuilder.h" 26 #include "llvm/MC/MCStreamer.h" 27 #include "llvm/MC/TargetRegistry.h" 28 29 using namespace llvm; 30 31 #define DEBUG_TYPE "csky-asm-printer" 32 33 STATISTIC(CSKYNumInstrsCompressed, 34 "Number of C-SKY Compressed instructions emitted"); 35 36 CSKYAsmPrinter::CSKYAsmPrinter(llvm::TargetMachine &TM, 37 std::unique_ptr<llvm::MCStreamer> Streamer) 38 : AsmPrinter(TM, std::move(Streamer)), MCInstLowering(OutContext, *this) {} 39 40 bool CSKYAsmPrinter::runOnMachineFunction(MachineFunction &MF) { 41 Subtarget = &MF.getSubtarget<CSKYSubtarget>(); 42 return AsmPrinter::runOnMachineFunction(MF); 43 } 44 45 #define GEN_COMPRESS_INSTR 46 #include "CSKYGenCompressInstEmitter.inc" 47 void CSKYAsmPrinter::EmitToStreamer(MCStreamer &S, const MCInst &Inst) { 48 MCInst CInst; 49 bool Res = compressInst(CInst, Inst, *Subtarget, OutStreamer->getContext()); 50 if (Res) 51 ++CSKYNumInstrsCompressed; 52 AsmPrinter::EmitToStreamer(*OutStreamer, Res ? CInst : Inst); 53 } 54 55 // Simple pseudo-instructions have their lowering (with expansion to real 56 // instructions) auto-generated. 57 #include "CSKYGenMCPseudoLowering.inc" 58 59 void CSKYAsmPrinter::emitInstruction(const MachineInstr *MI) { 60 // Do any auto-generated pseudo lowerings. 61 if (emitPseudoExpansionLowering(*OutStreamer, MI)) 62 return; 63 64 MCInst TmpInst; 65 MCInstLowering.Lower(MI, TmpInst); 66 EmitToStreamer(*OutStreamer, TmpInst); 67 } 68 69 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeCSKYAsmPrinter() { 70 RegisterAsmPrinter<CSKYAsmPrinter> X(getTheCSKYTarget()); 71 } 72