llvm/lib/CodeGen/AsmPrinter/DIE.cpp - toolchain/llvm-project - Gitiles

 //===--- lib/CodeGen/DIE.cpp - DWARF Info Entries -------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // Data structures for DWARF info entries.
 //
 //===----------------------------------------------------------------------===//

 #include "llvm/CodeGen/DIE.h"
 #include "DwarfCompileUnit.h"
 #include "DwarfDebug.h"
 #include "DwarfUnit.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/CodeGen/AsmPrinter.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/FormattedStream.h"
 #include "llvm/Support/LEB128.h"
 #include "llvm/Support/MD5.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;

 //===----------------------------------------------------------------------===//
 // DIEAbbrevData Implementation
 //===----------------------------------------------------------------------===//

 /// Profile - Used to gather unique data for the abbreviation folding set.
 ///
 void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const {
   // Explicitly cast to an integer type for which FoldingSetNodeID has
   // overloads.  Otherwise MSVC 2010 thinks this call is ambiguous.
   ID.AddInteger(unsigned(Attribute));
   ID.AddInteger(unsigned(Form));
 }

 //===----------------------------------------------------------------------===//
 // DIEAbbrev Implementation
 //===----------------------------------------------------------------------===//

 /// Profile - Used to gather unique data for the abbreviation folding set.
 ///
 void DIEAbbrev::Profile(FoldingSetNodeID &ID) const {
   ID.AddInteger(unsigned(Tag));
   ID.AddInteger(unsigned(Children));

   // For each attribute description.
   for (unsigned i = 0, N = Data.size(); i < N; ++i)
     Data[i].Profile(ID);
 }

 /// Emit - Print the abbreviation using the specified asm printer.
 ///
 void DIEAbbrev::Emit(const AsmPrinter *AP) const {
   // Emit its Dwarf tag type.
   AP->EmitULEB128(Tag, dwarf::TagString(Tag));

   // Emit whether it has children DIEs.
   AP->EmitULEB128((unsigned)Children, dwarf::ChildrenString(Children));

   // For each attribute description.
   for (unsigned i = 0, N = Data.size(); i < N; ++i) {
     const DIEAbbrevData &AttrData = Data[i];

     // Emit attribute type.
     AP->EmitULEB128(AttrData.getAttribute(),
                     dwarf::AttributeString(AttrData.getAttribute()));

     // Emit form type.
     AP->EmitULEB128(AttrData.getForm(),
                     dwarf::FormEncodingString(AttrData.getForm()));
   }

   // Mark end of abbreviation.
   AP->EmitULEB128(0, "EOM(1)");
   AP->EmitULEB128(0, "EOM(2)");
 }

 #ifndef NDEBUG
 void DIEAbbrev::print(raw_ostream &O) {
   O << "Abbreviation @"
     << format("0x%lx", (long)(intptr_t)this)
     << "  "
     << dwarf::TagString(Tag)
     << " "
     << dwarf::ChildrenString(Children)
     << '\n';

   for (unsigned i = 0, N = Data.size(); i < N; ++i) {
     O << "  "
       << dwarf::AttributeString(Data[i].getAttribute())
       << "  "
       << dwarf::FormEncodingString(Data[i].getForm())
       << '\n';
   }
 }
 void DIEAbbrev::dump() { print(dbgs()); }
 #endif

 /// Climb up the parent chain to get the unit DIE to which this DIE
 /// belongs.
 const DIE *DIE::getUnit() const {
   const DIE *Cu = getUnitOrNull();
   assert(Cu && "We should not have orphaned DIEs.");
   return Cu;
 }

 /// Climb up the parent chain to get the unit DIE this DIE belongs
 /// to. Return NULL if DIE is not added to an owner yet.
 const DIE *DIE::getUnitOrNull() const {
   const DIE *p = this;
   while (p) {
     if (p->getTag() == dwarf::DW_TAG_compile_unit ||
         p->getTag() == dwarf::DW_TAG_type_unit)
       return p;
     p = p->getParent();
   }
   return nullptr;
 }

 DIEValue *DIE::findAttribute(dwarf::Attribute Attribute) const {
   const SmallVectorImpl<DIEValue *> &Values = getValues();
   const DIEAbbrev &Abbrevs = getAbbrev();

   // Iterate through all the attributes until we find the one we're
   // looking for, if we can't find it return NULL.
   for (size_t i = 0; i < Values.size(); ++i)
     if (Abbrevs.getData()[i].getAttribute() == Attribute)
       return Values[i];
   return nullptr;
 }

 #ifndef NDEBUG
 void DIE::print(raw_ostream &O, unsigned IndentCount) const {
   const std::string Indent(IndentCount, ' ');
   bool isBlock = Abbrev.getTag() == 0;

   if (!isBlock) {
     O << Indent
       << "Die: "
       << format("0x%lx", (long)(intptr_t)this)
       << ", Offset: " << Offset
       << ", Size: " << Size << "\n";

     O << Indent
       << dwarf::TagString(Abbrev.getTag())
       << " "
       << dwarf::ChildrenString(Abbrev.hasChildren()) << "\n";
   } else {
     O << "Size: " << Size << "\n";
   }

   const SmallVectorImpl<DIEAbbrevData> &Data = Abbrev.getData();

   IndentCount += 2;
   for (unsigned i = 0, N = Data.size(); i < N; ++i) {
     O << Indent;

     if (!isBlock)
       O << dwarf::AttributeString(Data[i].getAttribute());
     else
       O << "Blk[" << i << "]";

     O <<  "  "
       << dwarf::FormEncodingString(Data[i].getForm())
       << " ";
     Values[i]->print(O);
     O << "\n";
   }
   IndentCount -= 2;

   for (unsigned j = 0, M = Children.size(); j < M; ++j) {
     Children[j]->print(O, IndentCount+4);
   }

   if (!isBlock) O << "\n";
 }

 void DIE::dump() {
   print(dbgs());
 }
 #endif

 void DIEValue::EmitValue(const AsmPrinter *AP, dwarf::Form Form) const {
   switch (Ty) {
 #define EMIT_VALUE_IMPL(Kind)                                                  \
   case is##Kind:                                                               \
     cast<DIE##Kind>(this)->EmitValueImpl(AP, Form);                            \
     break;
     EMIT_VALUE_IMPL(Integer)
     EMIT_VALUE_IMPL(String)
     EMIT_VALUE_IMPL(Expr)
     EMIT_VALUE_IMPL(Label)
     EMIT_VALUE_IMPL(Delta)
     EMIT_VALUE_IMPL(Entry)
     EMIT_VALUE_IMPL(TypeSignature)
     EMIT_VALUE_IMPL(Block)
     EMIT_VALUE_IMPL(Loc)
     EMIT_VALUE_IMPL(LocList)
 #undef EMIT_VALUE_IMPL
   }
 }

 unsigned DIEValue::SizeOf(const AsmPrinter *AP, dwarf::Form Form) const {
   switch (Ty) {
 #define SIZE_OF_IMPL(Kind)                                                     \
   case is##Kind:                                                               \
     return cast<DIE##Kind>(this)->SizeOfImpl(AP, Form);
     SIZE_OF_IMPL(Integer)
     SIZE_OF_IMPL(String)
     SIZE_OF_IMPL(Expr)
     SIZE_OF_IMPL(Label)
     SIZE_OF_IMPL(Delta)
     SIZE_OF_IMPL(Entry)
     SIZE_OF_IMPL(TypeSignature)
     SIZE_OF_IMPL(Block)
     SIZE_OF_IMPL(Loc)
     SIZE_OF_IMPL(LocList)
 #undef SIZE_OF_IMPL
   }
   llvm_unreachable("Unknown DIE kind");
 }

 #ifndef NDEBUG
 void DIEValue::print(raw_ostream &O) const {
   switch (Ty) {
 #define PRINT_IMPL(Kind)                                                       \
   case is##Kind:                                                               \
     cast<DIE##Kind>(this)->printImpl(O);                                       \
     break;
     PRINT_IMPL(Integer)
     PRINT_IMPL(String)
     PRINT_IMPL(Expr)
     PRINT_IMPL(Label)
     PRINT_IMPL(Delta)
     PRINT_IMPL(Entry)
     PRINT_IMPL(TypeSignature)
     PRINT_IMPL(Block)
     PRINT_IMPL(Loc)
     PRINT_IMPL(LocList)
 #undef PRINT_IMPL
   }
 }

 void DIEValue::dump() const {
   print(dbgs());
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIEInteger Implementation
 //===----------------------------------------------------------------------===//

 /// EmitValue - Emit integer of appropriate size.
 ///
 void DIEInteger::EmitValueImpl(const AsmPrinter *Asm, dwarf::Form Form) const {
   unsigned Size = ~0U;
   switch (Form) {
   case dwarf::DW_FORM_flag_present:
     // Emit something to keep the lines and comments in sync.
     // FIXME: Is there a better way to do this?
     Asm->OutStreamer->AddBlankLine();
     return;
   case dwarf::DW_FORM_flag:  // Fall thru
   case dwarf::DW_FORM_ref1:  // Fall thru
   case dwarf::DW_FORM_data1: Size = 1; break;
   case dwarf::DW_FORM_ref2:  // Fall thru
   case dwarf::DW_FORM_data2: Size = 2; break;
   case dwarf::DW_FORM_sec_offset: // Fall thru
   case dwarf::DW_FORM_strp: // Fall thru
   case dwarf::DW_FORM_ref4:  // Fall thru
   case dwarf::DW_FORM_data4: Size = 4; break;
   case dwarf::DW_FORM_ref8:  // Fall thru
   case dwarf::DW_FORM_ref_sig8:  // Fall thru
   case dwarf::DW_FORM_data8: Size = 8; break;
   case dwarf::DW_FORM_GNU_str_index: Asm->EmitULEB128(Integer); return;
   case dwarf::DW_FORM_GNU_addr_index: Asm->EmitULEB128(Integer); return;
   case dwarf::DW_FORM_udata: Asm->EmitULEB128(Integer); return;
   case dwarf::DW_FORM_sdata: Asm->EmitSLEB128(Integer); return;
   case dwarf::DW_FORM_addr:
     Size = Asm->getDataLayout().getPointerSize(); break;
   case dwarf::DW_FORM_ref_addr:
     Size = SizeOf(Asm, dwarf::DW_FORM_ref_addr);
     break;
   default: llvm_unreachable("DIE Value form not supported yet");
   }
   Asm->OutStreamer->EmitIntValue(Integer, Size);
 }

 /// SizeOf - Determine size of integer value in bytes.
 ///
 unsigned DIEInteger::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   switch (Form) {
   case dwarf::DW_FORM_flag_present: return 0;
   case dwarf::DW_FORM_flag:  // Fall thru
   case dwarf::DW_FORM_ref1:  // Fall thru
   case dwarf::DW_FORM_data1: return sizeof(int8_t);
   case dwarf::DW_FORM_ref2:  // Fall thru
   case dwarf::DW_FORM_data2: return sizeof(int16_t);
   case dwarf::DW_FORM_sec_offset: // Fall thru
   case dwarf::DW_FORM_strp: // Fall thru
   case dwarf::DW_FORM_ref4:  // Fall thru
   case dwarf::DW_FORM_data4: return sizeof(int32_t);
   case dwarf::DW_FORM_ref8:  // Fall thru
   case dwarf::DW_FORM_ref_sig8:  // Fall thru
   case dwarf::DW_FORM_data8: return sizeof(int64_t);
   case dwarf::DW_FORM_GNU_str_index: return getULEB128Size(Integer);
   case dwarf::DW_FORM_GNU_addr_index: return getULEB128Size(Integer);
   case dwarf::DW_FORM_udata: return getULEB128Size(Integer);
   case dwarf::DW_FORM_sdata: return getSLEB128Size(Integer);
   case dwarf::DW_FORM_addr:  return AP->getDataLayout().getPointerSize();
   case dwarf::DW_FORM_ref_addr:
     if (AP->OutStreamer->getContext().getDwarfVersion() == 2)
       return AP->getDataLayout().getPointerSize();
     return sizeof(int32_t);
   default: llvm_unreachable("DIE Value form not supported yet");
   }
 }

 #ifndef NDEBUG
 void DIEInteger::printImpl(raw_ostream &O) const {
   O << "Int: " << (int64_t)Integer << "  0x";
   O.write_hex(Integer);
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIEExpr Implementation
 //===----------------------------------------------------------------------===//

 /// EmitValue - Emit expression value.
 ///
 void DIEExpr::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   AP->OutStreamer->EmitValue(Expr, SizeOf(AP, Form));
 }

 /// SizeOf - Determine size of expression value in bytes.
 ///
 unsigned DIEExpr::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   if (Form == dwarf::DW_FORM_data4) return 4;
   if (Form == dwarf::DW_FORM_sec_offset) return 4;
   if (Form == dwarf::DW_FORM_strp) return 4;
   return AP->getDataLayout().getPointerSize();
 }

 #ifndef NDEBUG
 void DIEExpr::printImpl(raw_ostream &O) const {
   O << "Expr: ";
   Expr->print(O);
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIELabel Implementation
 //===----------------------------------------------------------------------===//

 /// EmitValue - Emit label value.
 ///
 void DIELabel::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   AP->EmitLabelReference(Label, SizeOf(AP, Form),
                          Form == dwarf::DW_FORM_strp ||
                              Form == dwarf::DW_FORM_sec_offset ||
                              Form == dwarf::DW_FORM_ref_addr);
 }

 /// SizeOf - Determine size of label value in bytes.
 ///
 unsigned DIELabel::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   if (Form == dwarf::DW_FORM_data4) return 4;
   if (Form == dwarf::DW_FORM_sec_offset) return 4;
   if (Form == dwarf::DW_FORM_strp) return 4;
   return AP->getDataLayout().getPointerSize();
 }

 #ifndef NDEBUG
 void DIELabel::printImpl(raw_ostream &O) const {
   O << "Lbl: " << Label->getName();
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIEDelta Implementation
 //===----------------------------------------------------------------------===//

 /// EmitValue - Emit delta value.
 ///
 void DIEDelta::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   AP->EmitLabelDifference(LabelHi, LabelLo, SizeOf(AP, Form));
 }

 /// SizeOf - Determine size of delta value in bytes.
 ///
 unsigned DIEDelta::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   if (Form == dwarf::DW_FORM_data4) return 4;
   if (Form == dwarf::DW_FORM_sec_offset) return 4;
   if (Form == dwarf::DW_FORM_strp) return 4;
   return AP->getDataLayout().getPointerSize();
 }

 #ifndef NDEBUG
 void DIEDelta::printImpl(raw_ostream &O) const {
   O << "Del: " << LabelHi->getName() << "-" << LabelLo->getName();
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIEString Implementation
 //===----------------------------------------------------------------------===//

 /// EmitValue - Emit string value.
 ///
 void DIEString::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   Access->EmitValue(AP, Form);
 }

 /// SizeOf - Determine size of delta value in bytes.
 ///
 unsigned DIEString::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   return Access->SizeOf(AP, Form);
 }

 #ifndef NDEBUG
 void DIEString::printImpl(raw_ostream &O) const {
   O << "String: " << Str << "\tSymbol: ";
   Access->print(O);
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIEEntry Implementation
 //===----------------------------------------------------------------------===//

 /// EmitValue - Emit debug information entry offset.
 ///
 void DIEEntry::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {

   if (Form == dwarf::DW_FORM_ref_addr) {
     const DwarfDebug *DD = AP->getDwarfDebug();
     unsigned Addr = Entry.getOffset();
     assert(!DD->useSplitDwarf() && "TODO: dwo files can't have relocations.");
     // For DW_FORM_ref_addr, output the offset from beginning of debug info
     // section. Entry->getOffset() returns the offset from start of the
     // compile unit.
     DwarfCompileUnit *CU = DD->lookupUnit(Entry.getUnit());
     assert(CU && "CUDie should belong to a CU.");
     Addr += CU->getDebugInfoOffset();
     if (AP->MAI->doesDwarfUseRelocationsAcrossSections())
       AP->EmitLabelPlusOffset(CU->getSectionSym(), Addr,
                               DIEEntry::getRefAddrSize(AP));
     else
       AP->OutStreamer->EmitIntValue(Addr, DIEEntry::getRefAddrSize(AP));
   } else
     AP->EmitInt32(Entry.getOffset());
 }

 unsigned DIEEntry::getRefAddrSize(const AsmPrinter *AP) {
   // DWARF4: References that use the attribute form DW_FORM_ref_addr are
   // specified to be four bytes in the DWARF 32-bit format and eight bytes
   // in the DWARF 64-bit format, while DWARF Version 2 specifies that such
   // references have the same size as an address on the target system.
   const DwarfDebug *DD = AP->getDwarfDebug();
   assert(DD && "Expected Dwarf Debug info to be available");
   if (DD->getDwarfVersion() == 2)
     return AP->getDataLayout().getPointerSize();
   return sizeof(int32_t);
 }

 #ifndef NDEBUG
 void DIEEntry::printImpl(raw_ostream &O) const {
   O << format("Die: 0x%lx", (long)(intptr_t)&Entry);
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIETypeSignature Implementation
 //===----------------------------------------------------------------------===//
 void DIETypeSignature::EmitValueImpl(const AsmPrinter *Asm, dwarf::Form Form) const {
   assert(Form == dwarf::DW_FORM_ref_sig8);
   Asm->OutStreamer->EmitIntValue(Unit.getTypeSignature(), 8);
 }

 #ifndef NDEBUG
 void DIETypeSignature::printImpl(raw_ostream &O) const {
   O << format("Type Unit: 0x%lx", Unit.getTypeSignature());
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIELoc Implementation
 //===----------------------------------------------------------------------===//

 /// ComputeSize - calculate the size of the location expression.
 ///
 unsigned DIELoc::ComputeSize(const AsmPrinter *AP) const {
   if (!Size) {
     const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
     for (unsigned i = 0, N = Values.size(); i < N; ++i)
       Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm());
   }

   return Size;
 }

 /// EmitValue - Emit location data.
 ///
 void DIELoc::EmitValueImpl(const AsmPrinter *Asm, dwarf::Form Form) const {
   switch (Form) {
   default: llvm_unreachable("Improper form for block");
   case dwarf::DW_FORM_block1: Asm->EmitInt8(Size);    break;
   case dwarf::DW_FORM_block2: Asm->EmitInt16(Size);   break;
   case dwarf::DW_FORM_block4: Asm->EmitInt32(Size);   break;
   case dwarf::DW_FORM_block:
   case dwarf::DW_FORM_exprloc:
     Asm->EmitULEB128(Size); break;
   }

   const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
   for (unsigned i = 0, N = Values.size(); i < N; ++i)
     Values[i]->EmitValue(Asm, AbbrevData[i].getForm());
 }

 /// SizeOf - Determine size of location data in bytes.
 ///
 unsigned DIELoc::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   switch (Form) {
   case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
   case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
   case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
   case dwarf::DW_FORM_block:
   case dwarf::DW_FORM_exprloc:
     return Size + getULEB128Size(Size);
   default: llvm_unreachable("Improper form for block");
   }
 }

 #ifndef NDEBUG
 void DIELoc::printImpl(raw_ostream &O) const {
   O << "ExprLoc: ";
   DIE::print(O, 5);
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIEBlock Implementation
 //===----------------------------------------------------------------------===//

 /// ComputeSize - calculate the size of the block.
 ///
 unsigned DIEBlock::ComputeSize(const AsmPrinter *AP) const {
   if (!Size) {
     const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
     for (unsigned i = 0, N = Values.size(); i < N; ++i)
       Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm());
   }

   return Size;
 }

 /// EmitValue - Emit block data.
 ///
 void DIEBlock::EmitValueImpl(const AsmPrinter *Asm, dwarf::Form Form) const {
   switch (Form) {
   default: llvm_unreachable("Improper form for block");
   case dwarf::DW_FORM_block1: Asm->EmitInt8(Size);    break;
   case dwarf::DW_FORM_block2: Asm->EmitInt16(Size);   break;
   case dwarf::DW_FORM_block4: Asm->EmitInt32(Size);   break;
   case dwarf::DW_FORM_block:  Asm->EmitULEB128(Size); break;
   }

   const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
   for (unsigned i = 0, N = Values.size(); i < N; ++i)
     Values[i]->EmitValue(Asm, AbbrevData[i].getForm());
 }

 /// SizeOf - Determine size of block data in bytes.
 ///
 unsigned DIEBlock::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   switch (Form) {
   case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
   case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
   case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
   case dwarf::DW_FORM_block:  return Size + getULEB128Size(Size);
   default: llvm_unreachable("Improper form for block");
   }
 }

 #ifndef NDEBUG
 void DIEBlock::printImpl(raw_ostream &O) const {
   O << "Blk: ";
   DIE::print(O, 5);
 }
 #endif

 //===----------------------------------------------------------------------===//
 // DIELocList Implementation
 //===----------------------------------------------------------------------===//

 unsigned DIELocList::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   if (Form == dwarf::DW_FORM_data4)
     return 4;
   if (Form == dwarf::DW_FORM_sec_offset)
     return 4;
   return AP->getDataLayout().getPointerSize();
 }

 /// EmitValue - Emit label value.
 ///
 void DIELocList::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
   DwarfDebug *DD = AP->getDwarfDebug();
   MCSymbol *Label = DD->getDebugLocs().getList(Index).Label;

   if (AP->MAI->doesDwarfUseRelocationsAcrossSections() && !DD->useSplitDwarf())
     AP->emitSectionOffset(Label);
   else
     AP->EmitLabelDifference(Label, Label->getSection().getBeginSymbol(), 4);
 }

 #ifndef NDEBUG
 void DIELocList::printImpl(raw_ostream &O) const {
   O << "LocList: " << Index;

 }
 #endif
	//===--- lib/CodeGen/DIE.cpp - DWARF Info Entries -------------------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	//
	// Data structures for DWARF info entries.
	//
	//===----------------------------------------------------------------------===//

	#include "llvm/CodeGen/DIE.h"
	#include "DwarfCompileUnit.h"
	#include "DwarfDebug.h"
	#include "DwarfUnit.h"
	#include "llvm/ADT/Twine.h"
	#include "llvm/CodeGen/AsmPrinter.h"
	#include "llvm/IR/DataLayout.h"
	#include "llvm/MC/MCAsmInfo.h"
	#include "llvm/MC/MCContext.h"
	#include "llvm/MC/MCStreamer.h"
	#include "llvm/MC/MCSymbol.h"
	#include "llvm/Support/Debug.h"
	#include "llvm/Support/ErrorHandling.h"
	#include "llvm/Support/Format.h"
	#include "llvm/Support/FormattedStream.h"
	#include "llvm/Support/LEB128.h"
	#include "llvm/Support/MD5.h"
	#include "llvm/Support/raw_ostream.h"
	using namespace llvm;

	//===----------------------------------------------------------------------===//
	// DIEAbbrevData Implementation
	//===----------------------------------------------------------------------===//

	/// Profile - Used to gather unique data for the abbreviation folding set.
	///
	void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const {
	// Explicitly cast to an integer type for which FoldingSetNodeID has
	// overloads. Otherwise MSVC 2010 thinks this call is ambiguous.
	ID.AddInteger(unsigned(Attribute));
	ID.AddInteger(unsigned(Form));
	}

	//===----------------------------------------------------------------------===//
	// DIEAbbrev Implementation
	//===----------------------------------------------------------------------===//

	/// Profile - Used to gather unique data for the abbreviation folding set.
	///
	void DIEAbbrev::Profile(FoldingSetNodeID &ID) const {
	ID.AddInteger(unsigned(Tag));
	ID.AddInteger(unsigned(Children));

	// For each attribute description.
	for (unsigned i = 0, N = Data.size(); i < N; ++i)
	Data[i].Profile(ID);
	}

	/// Emit - Print the abbreviation using the specified asm printer.
	///
	void DIEAbbrev::Emit(const AsmPrinter *AP) const {
	// Emit its Dwarf tag type.
	AP->EmitULEB128(Tag, dwarf::TagString(Tag));

	// Emit whether it has children DIEs.
	AP->EmitULEB128((unsigned)Children, dwarf::ChildrenString(Children));

	// For each attribute description.
	for (unsigned i = 0, N = Data.size(); i < N; ++i) {
	const DIEAbbrevData &AttrData = Data[i];

	// Emit attribute type.
	AP->EmitULEB128(AttrData.getAttribute(),
	dwarf::AttributeString(AttrData.getAttribute()));

	// Emit form type.
	AP->EmitULEB128(AttrData.getForm(),
	dwarf::FormEncodingString(AttrData.getForm()));
	}

	// Mark end of abbreviation.
	AP->EmitULEB128(0, "EOM(1)");
	AP->EmitULEB128(0, "EOM(2)");
	}

	#ifndef NDEBUG
	void DIEAbbrev::print(raw_ostream &O) {
	O << "Abbreviation @"
	<< format("0x%lx", (long)(intptr_t)this)
	<< " "
	<< dwarf::TagString(Tag)
	<< " "
	<< dwarf::ChildrenString(Children)
	<< '\n';

	for (unsigned i = 0, N = Data.size(); i < N; ++i) {
	O << " "
	<< dwarf::AttributeString(Data[i].getAttribute())
	<< " "
	<< dwarf::FormEncodingString(Data[i].getForm())
	<< '\n';
	}
	}
	void DIEAbbrev::dump() { print(dbgs()); }
	#endif

	/// Climb up the parent chain to get the unit DIE to which this DIE
	/// belongs.
	const DIE *DIE::getUnit() const {
	const DIE *Cu = getUnitOrNull();
	assert(Cu && "We should not have orphaned DIEs.");
	return Cu;
	}

	/// Climb up the parent chain to get the unit DIE this DIE belongs
	/// to. Return NULL if DIE is not added to an owner yet.
	const DIE *DIE::getUnitOrNull() const {
	const DIE *p = this;
	while (p) {
	if (p->getTag() == dwarf::DW_TAG_compile_unit \|\|
	p->getTag() == dwarf::DW_TAG_type_unit)
	return p;
	p = p->getParent();
	}
	return nullptr;
	}

	DIEValue *DIE::findAttribute(dwarf::Attribute Attribute) const {
	const SmallVectorImpl<DIEValue *> &Values = getValues();
	const DIEAbbrev &Abbrevs = getAbbrev();

	// Iterate through all the attributes until we find the one we're
	// looking for, if we can't find it return NULL.
	for (size_t i = 0; i < Values.size(); ++i)
	if (Abbrevs.getData()[i].getAttribute() == Attribute)
	return Values[i];
	return nullptr;
	}

	#ifndef NDEBUG
	void DIE::print(raw_ostream &O, unsigned IndentCount) const {
	const std::string Indent(IndentCount, ' ');
	bool isBlock = Abbrev.getTag() == 0;

	if (!isBlock) {
	O << Indent
	<< "Die: "
	<< format("0x%lx", (long)(intptr_t)this)
	<< ", Offset: " << Offset
	<< ", Size: " << Size << "\n";

	O << Indent
	<< dwarf::TagString(Abbrev.getTag())
	<< " "
	<< dwarf::ChildrenString(Abbrev.hasChildren()) << "\n";
	} else {
	O << "Size: " << Size << "\n";
	}

	const SmallVectorImpl<DIEAbbrevData> &Data = Abbrev.getData();

	IndentCount += 2;
	for (unsigned i = 0, N = Data.size(); i < N; ++i) {
	O << Indent;

	if (!isBlock)
	O << dwarf::AttributeString(Data[i].getAttribute());
	else
	O << "Blk[" << i << "]";

	O << " "
	<< dwarf::FormEncodingString(Data[i].getForm())
	<< " ";
	Values[i]->print(O);
	O << "\n";
	}
	IndentCount -= 2;

	for (unsigned j = 0, M = Children.size(); j < M; ++j) {
	Children[j]->print(O, IndentCount+4);
	}

	if (!isBlock) O << "\n";
	}

	void DIE::dump() {
	print(dbgs());
	}
	#endif

	void DIEValue::EmitValue(const AsmPrinter *AP, dwarf::Form Form) const {
	switch (Ty) {
	#define EMIT_VALUE_IMPL(Kind) \
	case is##Kind: \
	cast<DIE##Kind>(this)->EmitValueImpl(AP, Form); \
	break;
	EMIT_VALUE_IMPL(Integer)
	EMIT_VALUE_IMPL(String)
	EMIT_VALUE_IMPL(Expr)
	EMIT_VALUE_IMPL(Label)
	EMIT_VALUE_IMPL(Delta)
	EMIT_VALUE_IMPL(Entry)
	EMIT_VALUE_IMPL(TypeSignature)
	EMIT_VALUE_IMPL(Block)
	EMIT_VALUE_IMPL(Loc)
	EMIT_VALUE_IMPL(LocList)
	#undef EMIT_VALUE_IMPL
	}
	}

	unsigned DIEValue::SizeOf(const AsmPrinter *AP, dwarf::Form Form) const {
	switch (Ty) {
	#define SIZE_OF_IMPL(Kind) \
	case is##Kind: \
	return cast<DIE##Kind>(this)->SizeOfImpl(AP, Form);
	SIZE_OF_IMPL(Integer)
	SIZE_OF_IMPL(String)
	SIZE_OF_IMPL(Expr)
	SIZE_OF_IMPL(Label)
	SIZE_OF_IMPL(Delta)
	SIZE_OF_IMPL(Entry)
	SIZE_OF_IMPL(TypeSignature)
	SIZE_OF_IMPL(Block)
	SIZE_OF_IMPL(Loc)
	SIZE_OF_IMPL(LocList)
	#undef SIZE_OF_IMPL
	}
	llvm_unreachable("Unknown DIE kind");
	}

	#ifndef NDEBUG
	void DIEValue::print(raw_ostream &O) const {
	switch (Ty) {
	#define PRINT_IMPL(Kind) \
	case is##Kind: \
	cast<DIE##Kind>(this)->printImpl(O); \
	break;
	PRINT_IMPL(Integer)
	PRINT_IMPL(String)
	PRINT_IMPL(Expr)
	PRINT_IMPL(Label)
	PRINT_IMPL(Delta)
	PRINT_IMPL(Entry)
	PRINT_IMPL(TypeSignature)
	PRINT_IMPL(Block)
	PRINT_IMPL(Loc)
	PRINT_IMPL(LocList)
	#undef PRINT_IMPL
	}
	}

	void DIEValue::dump() const {
	print(dbgs());
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIEInteger Implementation
	//===----------------------------------------------------------------------===//

	/// EmitValue - Emit integer of appropriate size.
	///
	void DIEInteger::EmitValueImpl(const AsmPrinter *Asm, dwarf::Form Form) const {
	unsigned Size = ~0U;
	switch (Form) {
	case dwarf::DW_FORM_flag_present:
	// Emit something to keep the lines and comments in sync.
	// FIXME: Is there a better way to do this?
	Asm->OutStreamer->AddBlankLine();
	return;
	case dwarf::DW_FORM_flag: // Fall thru
	case dwarf::DW_FORM_ref1: // Fall thru
	case dwarf::DW_FORM_data1: Size = 1; break;
	case dwarf::DW_FORM_ref2: // Fall thru
	case dwarf::DW_FORM_data2: Size = 2; break;
	case dwarf::DW_FORM_sec_offset: // Fall thru
	case dwarf::DW_FORM_strp: // Fall thru
	case dwarf::DW_FORM_ref4: // Fall thru
	case dwarf::DW_FORM_data4: Size = 4; break;
	case dwarf::DW_FORM_ref8: // Fall thru
	case dwarf::DW_FORM_ref_sig8: // Fall thru
	case dwarf::DW_FORM_data8: Size = 8; break;
	case dwarf::DW_FORM_GNU_str_index: Asm->EmitULEB128(Integer); return;
	case dwarf::DW_FORM_GNU_addr_index: Asm->EmitULEB128(Integer); return;
	case dwarf::DW_FORM_udata: Asm->EmitULEB128(Integer); return;
	case dwarf::DW_FORM_sdata: Asm->EmitSLEB128(Integer); return;
	case dwarf::DW_FORM_addr:
	Size = Asm->getDataLayout().getPointerSize(); break;
	case dwarf::DW_FORM_ref_addr:
	Size = SizeOf(Asm, dwarf::DW_FORM_ref_addr);
	break;
	default: llvm_unreachable("DIE Value form not supported yet");
	}
	Asm->OutStreamer->EmitIntValue(Integer, Size);
	}

	/// SizeOf - Determine size of integer value in bytes.
	///
	unsigned DIEInteger::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	switch (Form) {
	case dwarf::DW_FORM_flag_present: return 0;
	case dwarf::DW_FORM_flag: // Fall thru
	case dwarf::DW_FORM_ref1: // Fall thru
	case dwarf::DW_FORM_data1: return sizeof(int8_t);
	case dwarf::DW_FORM_ref2: // Fall thru
	case dwarf::DW_FORM_data2: return sizeof(int16_t);
	case dwarf::DW_FORM_sec_offset: // Fall thru
	case dwarf::DW_FORM_strp: // Fall thru
	case dwarf::DW_FORM_ref4: // Fall thru
	case dwarf::DW_FORM_data4: return sizeof(int32_t);
	case dwarf::DW_FORM_ref8: // Fall thru
	case dwarf::DW_FORM_ref_sig8: // Fall thru
	case dwarf::DW_FORM_data8: return sizeof(int64_t);
	case dwarf::DW_FORM_GNU_str_index: return getULEB128Size(Integer);
	case dwarf::DW_FORM_GNU_addr_index: return getULEB128Size(Integer);
	case dwarf::DW_FORM_udata: return getULEB128Size(Integer);
	case dwarf::DW_FORM_sdata: return getSLEB128Size(Integer);
	case dwarf::DW_FORM_addr: return AP->getDataLayout().getPointerSize();
	case dwarf::DW_FORM_ref_addr:
	if (AP->OutStreamer->getContext().getDwarfVersion() == 2)
	return AP->getDataLayout().getPointerSize();
	return sizeof(int32_t);
	default: llvm_unreachable("DIE Value form not supported yet");
	}
	}

	#ifndef NDEBUG
	void DIEInteger::printImpl(raw_ostream &O) const {
	O << "Int: " << (int64_t)Integer << " 0x";
	O.write_hex(Integer);
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIEExpr Implementation
	//===----------------------------------------------------------------------===//

	/// EmitValue - Emit expression value.
	///
	void DIEExpr::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	AP->OutStreamer->EmitValue(Expr, SizeOf(AP, Form));
	}

	/// SizeOf - Determine size of expression value in bytes.
	///
	unsigned DIEExpr::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	if (Form == dwarf::DW_FORM_data4) return 4;
	if (Form == dwarf::DW_FORM_sec_offset) return 4;
	if (Form == dwarf::DW_FORM_strp) return 4;
	return AP->getDataLayout().getPointerSize();
	}

	#ifndef NDEBUG
	void DIEExpr::printImpl(raw_ostream &O) const {
	O << "Expr: ";
	Expr->print(O);
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIELabel Implementation
	//===----------------------------------------------------------------------===//

	/// EmitValue - Emit label value.
	///
	void DIELabel::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	AP->EmitLabelReference(Label, SizeOf(AP, Form),
	Form == dwarf::DW_FORM_strp \|\|
	Form == dwarf::DW_FORM_sec_offset \|\|
	Form == dwarf::DW_FORM_ref_addr);
	}

	/// SizeOf - Determine size of label value in bytes.
	///
	unsigned DIELabel::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	if (Form == dwarf::DW_FORM_data4) return 4;
	if (Form == dwarf::DW_FORM_sec_offset) return 4;
	if (Form == dwarf::DW_FORM_strp) return 4;
	return AP->getDataLayout().getPointerSize();
	}

	#ifndef NDEBUG
	void DIELabel::printImpl(raw_ostream &O) const {
	O << "Lbl: " << Label->getName();
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIEDelta Implementation
	//===----------------------------------------------------------------------===//

	/// EmitValue - Emit delta value.
	///
	void DIEDelta::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	AP->EmitLabelDifference(LabelHi, LabelLo, SizeOf(AP, Form));
	}

	/// SizeOf - Determine size of delta value in bytes.
	///
	unsigned DIEDelta::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	if (Form == dwarf::DW_FORM_data4) return 4;
	if (Form == dwarf::DW_FORM_sec_offset) return 4;
	if (Form == dwarf::DW_FORM_strp) return 4;
	return AP->getDataLayout().getPointerSize();
	}

	#ifndef NDEBUG
	void DIEDelta::printImpl(raw_ostream &O) const {
	O << "Del: " << LabelHi->getName() << "-" << LabelLo->getName();
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIEString Implementation
	//===----------------------------------------------------------------------===//

	/// EmitValue - Emit string value.
	///
	void DIEString::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	Access->EmitValue(AP, Form);
	}

	/// SizeOf - Determine size of delta value in bytes.
	///
	unsigned DIEString::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	return Access->SizeOf(AP, Form);
	}

	#ifndef NDEBUG
	void DIEString::printImpl(raw_ostream &O) const {
	O << "String: " << Str << "\tSymbol: ";
	Access->print(O);
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIEEntry Implementation
	//===----------------------------------------------------------------------===//

	/// EmitValue - Emit debug information entry offset.
	///
	void DIEEntry::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {

	if (Form == dwarf::DW_FORM_ref_addr) {
	const DwarfDebug *DD = AP->getDwarfDebug();
	unsigned Addr = Entry.getOffset();
	assert(!DD->useSplitDwarf() && "TODO: dwo files can't have relocations.");
	// For DW_FORM_ref_addr, output the offset from beginning of debug info
	// section. Entry->getOffset() returns the offset from start of the
	// compile unit.
	DwarfCompileUnit *CU = DD->lookupUnit(Entry.getUnit());
	assert(CU && "CUDie should belong to a CU.");
	Addr += CU->getDebugInfoOffset();
	if (AP->MAI->doesDwarfUseRelocationsAcrossSections())
	AP->EmitLabelPlusOffset(CU->getSectionSym(), Addr,
	DIEEntry::getRefAddrSize(AP));
	else
	AP->OutStreamer->EmitIntValue(Addr, DIEEntry::getRefAddrSize(AP));
	} else
	AP->EmitInt32(Entry.getOffset());
	}

	unsigned DIEEntry::getRefAddrSize(const AsmPrinter *AP) {
	// DWARF4: References that use the attribute form DW_FORM_ref_addr are
	// specified to be four bytes in the DWARF 32-bit format and eight bytes
	// in the DWARF 64-bit format, while DWARF Version 2 specifies that such
	// references have the same size as an address on the target system.
	const DwarfDebug *DD = AP->getDwarfDebug();
	assert(DD && "Expected Dwarf Debug info to be available");
	if (DD->getDwarfVersion() == 2)
	return AP->getDataLayout().getPointerSize();
	return sizeof(int32_t);
	}

	#ifndef NDEBUG
	void DIEEntry::printImpl(raw_ostream &O) const {
	O << format("Die: 0x%lx", (long)(intptr_t)&Entry);
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIETypeSignature Implementation
	//===----------------------------------------------------------------------===//
	void DIETypeSignature::EmitValueImpl(const AsmPrinter *Asm, dwarf::Form Form) const {
	assert(Form == dwarf::DW_FORM_ref_sig8);
	Asm->OutStreamer->EmitIntValue(Unit.getTypeSignature(), 8);
	}

	#ifndef NDEBUG
	void DIETypeSignature::printImpl(raw_ostream &O) const {
	O << format("Type Unit: 0x%lx", Unit.getTypeSignature());
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIELoc Implementation
	//===----------------------------------------------------------------------===//

	/// ComputeSize - calculate the size of the location expression.
	///
	unsigned DIELoc::ComputeSize(const AsmPrinter *AP) const {
	if (!Size) {
	const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
	for (unsigned i = 0, N = Values.size(); i < N; ++i)
	Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm());
	}

	return Size;
	}

	/// EmitValue - Emit location data.
	///
	void DIELoc::EmitValueImpl(const AsmPrinter *Asm, dwarf::Form Form) const {
	switch (Form) {
	default: llvm_unreachable("Improper form for block");
	case dwarf::DW_FORM_block1: Asm->EmitInt8(Size); break;
	case dwarf::DW_FORM_block2: Asm->EmitInt16(Size); break;
	case dwarf::DW_FORM_block4: Asm->EmitInt32(Size); break;
	case dwarf::DW_FORM_block:
	case dwarf::DW_FORM_exprloc:
	Asm->EmitULEB128(Size); break;
	}

	const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
	for (unsigned i = 0, N = Values.size(); i < N; ++i)
	Values[i]->EmitValue(Asm, AbbrevData[i].getForm());
	}

	/// SizeOf - Determine size of location data in bytes.
	///
	unsigned DIELoc::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	switch (Form) {
	case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
	case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
	case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
	case dwarf::DW_FORM_block:
	case dwarf::DW_FORM_exprloc:
	return Size + getULEB128Size(Size);
	default: llvm_unreachable("Improper form for block");
	}
	}

	#ifndef NDEBUG
	void DIELoc::printImpl(raw_ostream &O) const {
	O << "ExprLoc: ";
	DIE::print(O, 5);
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIEBlock Implementation
	//===----------------------------------------------------------------------===//

	/// ComputeSize - calculate the size of the block.
	///
	unsigned DIEBlock::ComputeSize(const AsmPrinter *AP) const {
	if (!Size) {
	const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
	for (unsigned i = 0, N = Values.size(); i < N; ++i)
	Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm());
	}

	return Size;
	}

	/// EmitValue - Emit block data.
	///
	void DIEBlock::EmitValueImpl(const AsmPrinter *Asm, dwarf::Form Form) const {
	switch (Form) {
	default: llvm_unreachable("Improper form for block");
	case dwarf::DW_FORM_block1: Asm->EmitInt8(Size); break;
	case dwarf::DW_FORM_block2: Asm->EmitInt16(Size); break;
	case dwarf::DW_FORM_block4: Asm->EmitInt32(Size); break;
	case dwarf::DW_FORM_block: Asm->EmitULEB128(Size); break;
	}

	const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
	for (unsigned i = 0, N = Values.size(); i < N; ++i)
	Values[i]->EmitValue(Asm, AbbrevData[i].getForm());
	}

	/// SizeOf - Determine size of block data in bytes.
	///
	unsigned DIEBlock::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	switch (Form) {
	case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
	case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
	case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
	case dwarf::DW_FORM_block: return Size + getULEB128Size(Size);
	default: llvm_unreachable("Improper form for block");
	}
	}

	#ifndef NDEBUG
	void DIEBlock::printImpl(raw_ostream &O) const {
	O << "Blk: ";
	DIE::print(O, 5);
	}
	#endif

	//===----------------------------------------------------------------------===//
	// DIELocList Implementation
	//===----------------------------------------------------------------------===//

	unsigned DIELocList::SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	if (Form == dwarf::DW_FORM_data4)
	return 4;
	if (Form == dwarf::DW_FORM_sec_offset)
	return 4;
	return AP->getDataLayout().getPointerSize();
	}

	/// EmitValue - Emit label value.
	///
	void DIELocList::EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const {
	DwarfDebug *DD = AP->getDwarfDebug();
	MCSymbol *Label = DD->getDebugLocs().getList(Index).Label;

	if (AP->MAI->doesDwarfUseRelocationsAcrossSections() && !DD->useSplitDwarf())
	AP->emitSectionOffset(Label);
	else
	AP->EmitLabelDifference(Label, Label->getSection().getBeginSymbol(), 4);
	}

	#ifndef NDEBUG
	void DIELocList::printImpl(raw_ostream &O) const {
	O << "LocList: " << Index;

	}
	#endif