LCOV - code coverage report
Current view: top level - lib/Target/AArch64 - AArch64TargetObjectFile.cpp (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 27 29 93.1 %
Date: 2017-09-14 15:23:50 Functions: 6 6 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===-- AArch64TargetObjectFile.cpp - AArch64 Object Info -----------------===//
       2             : //
       3             : //                     The LLVM Compiler Infrastructure
       4             : //
       5             : // This file is distributed under the University of Illinois Open Source
       6             : // License. See LICENSE.TXT for details.
       7             : //
       8             : //===----------------------------------------------------------------------===//
       9             : 
      10             : #include "AArch64TargetObjectFile.h"
      11             : #include "AArch64TargetMachine.h"
      12             : #include "llvm/BinaryFormat/Dwarf.h"
      13             : #include "llvm/IR/Mangler.h"
      14             : #include "llvm/MC/MCContext.h"
      15             : #include "llvm/MC/MCExpr.h"
      16             : #include "llvm/MC/MCStreamer.h"
      17             : #include "llvm/MC/MCValue.h"
      18             : using namespace llvm;
      19             : using namespace dwarf;
      20             : 
      21         688 : void AArch64_ELFTargetObjectFile::Initialize(MCContext &Ctx,
      22             :                                              const TargetMachine &TM) {
      23         688 :   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
      24         688 :   InitializeELF(TM.Options.UseInitArray);
      25         688 : }
      26             : 
      27         395 : AArch64_MachoTargetObjectFile::AArch64_MachoTargetObjectFile()
      28         395 :   : TargetLoweringObjectFileMachO() {
      29         395 :   SupportGOTPCRelWithOffset = false;
      30         395 : }
      31             : 
      32           2 : const MCExpr *AArch64_MachoTargetObjectFile::getTTypeGlobalReference(
      33             :     const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
      34             :     MachineModuleInfo *MMI, MCStreamer &Streamer) const {
      35             :   // On Darwin, we can reference dwarf symbols with foo@GOT-., which
      36             :   // is an indirect pc-relative reference. The default implementation
      37             :   // won't reference using the GOT, so we need this target-specific
      38             :   // version.
      39           2 :   if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
      40           2 :     const MCSymbol *Sym = TM.getSymbol(GV);
      41             :     const MCExpr *Res =
      42           2 :         MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOT, getContext());
      43           2 :     MCSymbol *PCSym = getContext().createTempSymbol();
      44           2 :     Streamer.EmitLabel(PCSym);
      45           4 :     const MCExpr *PC = MCSymbolRefExpr::create(PCSym, getContext());
      46           4 :     return MCBinaryExpr::createSub(Res, PC, getContext());
      47             :   }
      48             : 
      49           0 :   return TargetLoweringObjectFileMachO::getTTypeGlobalReference(
      50           0 :       GV, Encoding, TM, MMI, Streamer);
      51             : }
      52             : 
      53           2 : MCSymbol *AArch64_MachoTargetObjectFile::getCFIPersonalitySymbol(
      54             :     const GlobalValue *GV, const TargetMachine &TM,
      55             :     MachineModuleInfo *MMI) const {
      56           2 :   return TM.getSymbol(GV);
      57             : }
      58             : 
      59           3 : const MCExpr *AArch64_MachoTargetObjectFile::getIndirectSymViaGOTPCRel(
      60             :     const MCSymbol *Sym, const MCValue &MV, int64_t Offset,
      61             :     MachineModuleInfo *MMI, MCStreamer &Streamer) const {
      62             :   assert((Offset+MV.getConstant() == 0) &&
      63             :          "Arch64 does not support GOT PC rel with extra offset");
      64             :   // On ARM64 Darwin, we can reference symbols with foo@GOT-., which
      65             :   // is an indirect pc-relative reference.
      66             :   const MCExpr *Res =
      67           3 :       MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOT, getContext());
      68           3 :   MCSymbol *PCSym = getContext().createTempSymbol();
      69           3 :   Streamer.EmitLabel(PCSym);
      70           6 :   const MCExpr *PC = MCSymbolRefExpr::create(PCSym, getContext());
      71           6 :   return MCBinaryExpr::createSub(Res, PC, getContext());
      72             : }
      73             : 
      74         100 : void AArch64_MachoTargetObjectFile::getNameWithPrefix(
      75             :     SmallVectorImpl<char> &OutName, const GlobalValue *GV,
      76             :     const TargetMachine &TM) const {
      77             :   // AArch64 does not use section-relative relocations so any global symbol must
      78             :   // be accessed via at least a linker-private symbol.
      79         100 :   getMangler().getNameWithPrefix(OutName, GV, /* CannotUsePrivateLabel */ true);
      80         100 : }

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