SparcTargetObjectFile.cpp

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//===------- SparcTargetObjectFile.cpp - Sparc Object Info Impl -----------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "SparcTargetObjectFile.h"
#include "MCTargetDesc/SparcMCExpr.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/CodeGen/TargetLowering.h"

using namespace llvm;

void SparcELFTargetObjectFile::Initialize(MCContext &Ctx,
                                          const TargetMachine &TM) {
  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
  InitializeELF(TM.Options.UseInitArray);
}

const MCExpr *SparcELFTargetObjectFile::getTTypeGlobalReference(
    const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
    MachineModuleInfo *MMI, MCStreamer &Streamer) const {

  if (Encoding & dwarf::DW_EH_PE_pcrel) {
    MachineModuleInfoELF &ELFMMI = MMI->getObjFileInfo<MachineModuleInfoELF>();

    MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, ".DW.stub", TM);

    // Add information about the stub reference to ELFMMI so that the stub
    // gets emitted by the asmprinter.
    MachineModuleInfoImpl::StubValueTy &StubSym = ELFMMI.getGVStubEntry(SSym);
    if (!StubSym.getPointer()) {
      MCSymbol *Sym = TM.getSymbol(GV);
      StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
    }

    MCContext &Ctx = getContext();
    return SparcMCExpr::create(SparcMCExpr::VK_Sparc_R_DISP32,
                               MCSymbolRefExpr::create(SSym, Ctx), Ctx);
  }

  return TargetLoweringObjectFileELF::getTTypeGlobalReference(GV, Encoding, TM,
                                                              MMI, Streamer);
}