3297758901
Add support of parsing .csky_attribute directive and emit related target attributes in .csky.attribute section. It does not emit attribute directive in assembly code, so only emit target attributes in ELF streamer. In ELF streamer, it handles the header EFlag and the csky_attribute section which contains some attribute items. The EFlag and attribute items are calculated from feature bits based on Subtarget.
129 lines
5.0 KiB
C++
129 lines
5.0 KiB
C++
//===-- CSKYMCTargetDesc.cpp - CSKY Target Descriptions -------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// This file provides CSKY specific target descriptions.
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///
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//===----------------------------------------------------------------------===//
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#include "CSKYMCTargetDesc.h"
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#include "CSKYAsmBackend.h"
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#include "CSKYELFStreamer.h"
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#include "CSKYInstPrinter.h"
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#include "CSKYMCAsmInfo.h"
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#include "CSKYMCCodeEmitter.h"
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#include "CSKYTargetStreamer.h"
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#include "TargetInfo/CSKYTargetInfo.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/MC/TargetRegistry.h"
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#define GET_INSTRINFO_MC_DESC
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#include "CSKYGenInstrInfo.inc"
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#define GET_REGINFO_MC_DESC
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#include "CSKYGenRegisterInfo.inc"
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#define GET_SUBTARGETINFO_MC_DESC
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#include "CSKYGenSubtargetInfo.inc"
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using namespace llvm;
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static MCAsmInfo *createCSKYMCAsmInfo(const MCRegisterInfo &MRI,
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const Triple &TT,
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const MCTargetOptions &Options) {
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MCAsmInfo *MAI = new CSKYMCAsmInfo(TT);
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// Initial state of the frame pointer is SP.
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unsigned Reg = MRI.getDwarfRegNum(CSKY::R14, true);
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MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, Reg, 0);
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MAI->addInitialFrameState(Inst);
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return MAI;
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}
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static MCInstrInfo *createCSKYMCInstrInfo() {
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MCInstrInfo *Info = new MCInstrInfo();
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InitCSKYMCInstrInfo(Info);
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return Info;
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}
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static MCInstPrinter *createCSKYMCInstPrinter(const Triple &T,
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unsigned SyntaxVariant,
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const MCAsmInfo &MAI,
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const MCInstrInfo &MII,
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const MCRegisterInfo &MRI) {
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return new CSKYInstPrinter(MAI, MII, MRI);
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}
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static MCRegisterInfo *createCSKYMCRegisterInfo(const Triple &TT) {
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MCRegisterInfo *Info = new MCRegisterInfo();
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InitCSKYMCRegisterInfo(Info, CSKY::R15);
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return Info;
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}
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static MCSubtargetInfo *createCSKYMCSubtargetInfo(const Triple &TT,
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StringRef CPU, StringRef FS) {
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std::string CPUName = std::string(CPU);
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if (CPUName.empty())
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CPUName = "generic";
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return createCSKYMCSubtargetInfoImpl(TT, CPUName, /*TuneCPU=*/CPUName, FS);
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}
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static MCTargetStreamer *
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createCSKYObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
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const Triple &TT = STI.getTargetTriple();
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if (TT.isOSBinFormatELF())
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return new CSKYTargetELFStreamer(S, STI);
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return nullptr;
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}
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static MCStreamer *createELFStreamer(const Triple &T, MCContext &Ctx,
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std::unique_ptr<MCAsmBackend> &&MAB,
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std::unique_ptr<MCObjectWriter> &&OW,
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std::unique_ptr<MCCodeEmitter> &&Emitter,
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bool RelaxAll) {
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CSKYELFStreamer *S = new CSKYELFStreamer(Ctx, std::move(MAB), std::move(OW),
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std::move(Emitter));
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if (RelaxAll)
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S->getAssembler().setRelaxAll(true);
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return S;
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}
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static MCTargetStreamer *createCSKYAsmTargetStreamer(MCStreamer &S,
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formatted_raw_ostream &OS,
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MCInstPrinter *InstPrinter,
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bool isVerboseAsm) {
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return new CSKYTargetAsmStreamer(S, OS);
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}
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static MCTargetStreamer *createCSKYNullTargetStreamer(MCStreamer &S) {
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return new CSKYTargetStreamer(S);
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}
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extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeCSKYTargetMC() {
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auto &CSKYTarget = getTheCSKYTarget();
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TargetRegistry::RegisterMCAsmBackend(CSKYTarget, createCSKYAsmBackend);
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TargetRegistry::RegisterMCAsmInfo(CSKYTarget, createCSKYMCAsmInfo);
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TargetRegistry::RegisterMCInstrInfo(CSKYTarget, createCSKYMCInstrInfo);
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TargetRegistry::RegisterMCRegInfo(CSKYTarget, createCSKYMCRegisterInfo);
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TargetRegistry::RegisterMCCodeEmitter(CSKYTarget, createCSKYMCCodeEmitter);
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TargetRegistry::RegisterMCInstPrinter(CSKYTarget, createCSKYMCInstPrinter);
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TargetRegistry::RegisterMCSubtargetInfo(CSKYTarget,
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createCSKYMCSubtargetInfo);
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TargetRegistry::RegisterELFStreamer(CSKYTarget, createELFStreamer);
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TargetRegistry::RegisterObjectTargetStreamer(CSKYTarget,
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createCSKYObjectTargetStreamer);
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TargetRegistry::RegisterAsmTargetStreamer(CSKYTarget,
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createCSKYAsmTargetStreamer);
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// Register the null target streamer.
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TargetRegistry::RegisterNullTargetStreamer(CSKYTarget,
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createCSKYNullTargetStreamer);
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}
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