Coverage Report

Created: 2017-10-03 07:32

/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/lib/Target/X86/X86TargetObjectFile.cpp
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//===-- X86TargetObjectFile.cpp - X86 Object Info -------------------------===//
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//
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//                     The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "X86TargetObjectFile.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/IR/Mangler.h"
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#include "llvm/IR/Operator.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCSectionCOFF.h"
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#include "llvm/MC/MCSectionELF.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/Target/TargetLowering.h"
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using namespace llvm;
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using namespace dwarf;
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const MCExpr *X86_64MachoTargetObjectFile::getTTypeGlobalReference(
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    const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
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    MachineModuleInfo *MMI, MCStreamer &Streamer) const {
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  // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
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  // is an indirect pc-relative reference.
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  if (
(Encoding & DW_EH_PE_indirect) && 11
(Encoding & DW_EH_PE_pcrel)11
) {
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    const MCSymbol *Sym = TM.getSymbol(GV);
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    const MCExpr *Res =
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      MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
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    const MCExpr *Four = MCConstantExpr::create(4, getContext());
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    return MCBinaryExpr::createAdd(Res, Four, getContext());
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  }
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  return TargetLoweringObjectFileMachO::getTTypeGlobalReference(
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      GV, Encoding, TM, MMI, Streamer);
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}
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MCSymbol *X86_64MachoTargetObjectFile::getCFIPersonalitySymbol(
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    const GlobalValue *GV, const TargetMachine &TM,
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    MachineModuleInfo *MMI) const {
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  return TM.getSymbol(GV);
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}
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const MCExpr *X86_64MachoTargetObjectFile::getIndirectSymViaGOTPCRel(
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    const MCSymbol *Sym, const MCValue &MV, int64_t Offset,
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    MachineModuleInfo *MMI, MCStreamer &Streamer) const {
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  // On Darwin/X86-64, we need to use foo@GOTPCREL+4 to access the got entry
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  // from a data section. In case there's an additional offset, then use
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  // foo@GOTPCREL+4+<offset>.
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  unsigned FinalOff = Offset+MV.getConstant()+4;
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  const MCExpr *Res =
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    MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, getContext());
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  const MCExpr *Off = MCConstantExpr::create(FinalOff, getContext());
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  return MCBinaryExpr::createAdd(Res, Off, getContext());
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}
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const MCExpr *X86ELFTargetObjectFile::getDebugThreadLocalSymbol(
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    const MCSymbol *Sym) const {
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  return MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
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}
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void
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X86FreeBSDTargetObjectFile::Initialize(MCContext &Ctx,
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                                       const TargetMachine &TM) {
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  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
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  InitializeELF(TM.Options.UseInitArray);
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}
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void
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X86FuchsiaTargetObjectFile::Initialize(MCContext &Ctx,
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                                       const TargetMachine &TM) {
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  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
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  InitializeELF(TM.Options.UseInitArray);
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}
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void
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X86LinuxNaClTargetObjectFile::Initialize(MCContext &Ctx,
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                                         const TargetMachine &TM) {
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  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
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1.51k
  InitializeELF(TM.Options.UseInitArray);
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}
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void X86SolarisTargetObjectFile::Initialize(MCContext &Ctx,
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                                            const TargetMachine &TM) {
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  TargetLoweringObjectFileELF::Initialize(Ctx, TM);
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  InitializeELF(TM.Options.UseInitArray);
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}
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const MCExpr *X86WindowsTargetObjectFile::lowerRelativeReference(
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    const GlobalValue *LHS, const GlobalValue *RHS,
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    const TargetMachine &TM) const {
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  // Our symbols should exist in address space zero, cowardly no-op if
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  // otherwise.
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  if (LHS->getType()->getPointerAddressSpace() != 0 ||
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      RHS->getType()->getPointerAddressSpace() != 0)
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    return nullptr;
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  // Both ptrtoint instructions must wrap global objects:
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  // - Only global variables are eligible for image relative relocations.
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  // - The subtrahend refers to the special symbol __ImageBase, a GlobalVariable.
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  // We expect __ImageBase to be a global variable without a section, externally
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  // defined.
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  //
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  // It should look something like this: @__ImageBase = external constant i8
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if (74
!isa<GlobalObject>(LHS) || 74
!isa<GlobalVariable>(RHS)74
||
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LHS->isThreadLocal()74
||
RHS->isThreadLocal()74
||
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RHS->getName() != "__ImageBase"74
||
!RHS->hasExternalLinkage()69
||
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cast<GlobalVariable>(RHS)->hasInitializer()69
||
RHS->hasSection()69
)
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    return nullptr;
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  return MCSymbolRefExpr::create(TM.getSymbol(LHS),
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                                 MCSymbolRefExpr::VK_COFF_IMGREL32,
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                                 getContext());
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}
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static std::string APIntToHexString(const APInt &AI) {
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  unsigned Width = (AI.getBitWidth() / 8) * 2;
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  std::string HexString = utohexstr(AI.getLimitedValue(), /*LowerCase=*/true);
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  unsigned Size = HexString.size();
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  assert(Width >= Size && "hex string is too large!");
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  HexString.insert(HexString.begin(), Width - Size, '0');
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  return HexString;
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}
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static std::string scalarConstantToHexString(const Constant *C) {
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  Type *Ty = C->getType();
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  if (
isa<UndefValue>(C)564
) {
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    return APIntToHexString(APInt::getNullValue(Ty->getPrimitiveSizeInBits()));
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  } else 
if (const auto *558
CFP558
= dyn_cast<ConstantFP>(C)) {
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    return APIntToHexString(CFP->getValueAPF().bitcastToAPInt());
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  } else 
if (const auto *363
CI363
= dyn_cast<ConstantInt>(C)) {
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    return APIntToHexString(CI->getValue());
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  } else {
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    unsigned NumElements;
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    if (isa<VectorType>(Ty))
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      NumElements = Ty->getVectorNumElements();
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    else
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      NumElements = Ty->getArrayNumElements();
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    std::string HexString;
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    for (int I = NumElements - 1, E = -1; 
I != E393
;
--I336
)
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      HexString += scalarConstantToHexString(C->getAggregateElement(I));
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    return HexString;
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  }
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}
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MCSection *X86WindowsTargetObjectFile::getSectionForConstant(
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    const DataLayout &DL, SectionKind Kind, const Constant *C,
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    unsigned &Align) const {
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  if (
Kind.isMergeableConst() && 231
C228
) {
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    const unsigned Characteristics = COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
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                                     COFF::IMAGE_SCN_MEM_READ |
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                                     COFF::IMAGE_SCN_LNK_COMDAT;
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    std::string COMDATSymName;
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    if (
Kind.isMergeableConst4()228
) {
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      if (
Align <= 490
) {
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        COMDATSymName = "__real@" + scalarConstantToHexString(C);
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        Align = 4;
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      }
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    } else 
if (138
Kind.isMergeableConst8()138
) {
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      if (
Align <= 884
) {
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        COMDATSymName = "__real@" + scalarConstantToHexString(C);
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        Align = 8;
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      }
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    } else 
if (54
Kind.isMergeableConst16()54
) {
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      if (
Align <= 1651
) {
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        COMDATSymName = "__xmm@" + scalarConstantToHexString(C);
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        Align = 16;
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      }
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    } else 
if (3
Kind.isMergeableConst32()3
) {
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      if (
Align <= 323
) {
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        COMDATSymName = "__ymm@" + scalarConstantToHexString(C);
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        Align = 32;
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      }
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    }
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    if (!COMDATSymName.empty())
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      return getContext().getCOFFSection(".rdata", Characteristics, Kind,
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                                         COMDATSymName,
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                                         COFF::IMAGE_COMDAT_SELECT_ANY);
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  }
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  return TargetLoweringObjectFile::getSectionForConstant(DL, Kind, C, Align);
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}