X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FCodeGen%2FAsmPrinter%2FDIE.cpp;h=50ea369b432232d49eac20f5a4d176649a5603ad;hp=b2c70d51f5a53fb8872f78a52af275417d1b2e0f;hb=ab08da75d70c76fd946483e29366264c92cc092b;hpb=a37d5387a54aa9424f6f8c96e5cab1dcbbcd8623 diff --git a/lib/CodeGen/AsmPrinter/DIE.cpp b/lib/CodeGen/AsmPrinter/DIE.cpp index b2c70d51f5a..50ea369b432 100644 --- a/lib/CodeGen/AsmPrinter/DIE.cpp +++ b/lib/CodeGen/AsmPrinter/DIE.cpp @@ -8,21 +8,27 @@ //===----------------------------------------------------------------------===// // // Data structures for DWARF info entries. -// +// //===----------------------------------------------------------------------===// #include "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/Target/TargetData.h" -#include "llvm/Support/Allocator.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" using namespace llvm; //===----------------------------------------------------------------------===// @@ -32,8 +38,10 @@ using namespace llvm; /// Profile - Used to gather unique data for the abbreviation folding set. /// void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const { - ID.AddInteger(Attribute); - ID.AddInteger(Form); + // 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)); } //===----------------------------------------------------------------------===// @@ -43,8 +51,8 @@ void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const { /// Profile - Used to gather unique data for the abbreviation folding set. /// void DIEAbbrev::Profile(FoldingSetNodeID &ID) const { - ID.AddInteger(Tag); - ID.AddInteger(ChildrenFlag); + ID.AddInteger(unsigned(Tag)); + ID.AddInteger(unsigned(Children)); // For each attribute description. for (unsigned i = 0, N = Data.size(); i < N; ++i) @@ -55,24 +63,20 @@ void DIEAbbrev::Profile(FoldingSetNodeID &ID) const { /// void DIEAbbrev::Emit(AsmPrinter *AP) const { // Emit its Dwarf tag type. - // FIXME: Doing work even in non-asm-verbose runs. AP->EmitULEB128(Tag, dwarf::TagString(Tag)); // Emit whether it has children DIEs. - // FIXME: Doing work even in non-asm-verbose runs. - AP->EmitULEB128(ChildrenFlag, dwarf::ChildrenString(ChildrenFlag)); + 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. - // FIXME: Doing work even in non-asm-verbose runs. AP->EmitULEB128(AttrData.getAttribute(), - dwarf::AttributeString(AttrData.getAttribute())); + dwarf::AttributeString(AttrData.getAttribute())); // Emit form type. - // FIXME: Doing work even in non-asm-verbose runs. AP->EmitULEB128(AttrData.getForm(), dwarf::FormEncodingString(AttrData.getForm())); } @@ -89,7 +93,7 @@ void DIEAbbrev::print(raw_ostream &O) { << " " << dwarf::TagString(Tag) << " " - << dwarf::ChildrenString(ChildrenFlag) + << dwarf::ChildrenString(Children) << '\n'; for (unsigned i = 0, N = Data.size(); i < N; ++i) { @@ -103,27 +107,41 @@ void DIEAbbrev::print(raw_ostream &O) { void DIEAbbrev::dump() { print(dbgs()); } #endif -//===----------------------------------------------------------------------===// -// DIE Implementation -//===----------------------------------------------------------------------===// +/// 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; +} -DIE::~DIE() { - for (unsigned i = 0, N = Children.size(); i < N; ++i) - delete Children[i]; +/// 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; } -/// addSiblingOffset - Add a sibling offset field to the front of the DIE. -/// -DIEValue *DIE::addSiblingOffset(BumpPtrAllocator &A) { - DIEInteger *DI = new (A) DIEInteger(0); - Values.insert(Values.begin(), DI); - Abbrev.AddFirstAttribute(dwarf::DW_AT_sibling, dwarf::DW_FORM_ref4); - return DI; +DIEValue *DIE::findAttribute(dwarf::Attribute Attribute) const { + const SmallVectorImpl &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 IncIndent) { - IndentCount += IncIndent; +void DIE::print(raw_ostream &O, unsigned IndentCount) const { const std::string Indent(IndentCount, ' '); bool isBlock = Abbrev.getTag() == 0; @@ -137,12 +155,12 @@ void DIE::print(raw_ostream &O, unsigned IncIndent) { O << Indent << dwarf::TagString(Abbrev.getTag()) << " " - << dwarf::ChildrenString(Abbrev.getChildrenFlag()) << "\n"; + << dwarf::ChildrenString(Abbrev.hasChildren()) << "\n"; } else { O << "Size: " << Size << "\n"; } - const SmallVector &Data = Abbrev.getData(); + const SmallVectorImpl &Data = Abbrev.getData(); IndentCount += 2; for (unsigned i = 0, N = Data.size(); i < N; ++i) { @@ -162,11 +180,10 @@ void DIE::print(raw_ostream &O, unsigned IncIndent) { IndentCount -= 2; for (unsigned j = 0, M = Children.size(); j < M; ++j) { - Children[j]->print(O, 4); + Children[j]->print(O, IndentCount+4); } if (!isBlock) O << "\n"; - IndentCount -= IncIndent; } void DIE::dump() { @@ -174,9 +191,10 @@ void DIE::dump() { } #endif +void DIEValue::anchor() { } #ifndef NDEBUG -void DIEValue::dump() { +void DIEValue::dump() const { print(dbgs()); } #endif @@ -187,67 +205,91 @@ void DIEValue::dump() { /// EmitValue - Emit integer of appropriate size. /// -void DIEInteger::EmitValue(AsmPrinter *Asm, unsigned Form) const { +void DIEInteger::EmitValue(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_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; default: llvm_unreachable("DIE Value form not supported yet"); } - Asm->OutStreamer.EmitIntValue(Integer, Size, 0/*addrspace*/); + Asm->OutStreamer.EmitIntValue(Integer, Size); } /// SizeOf - Determine size of integer value in bytes. /// -unsigned DIEInteger::SizeOf(AsmPrinter *AP, unsigned Form) const { +unsigned DIEInteger::SizeOf(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_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_udata: return MCAsmInfo::getULEB128Size(Integer); - case dwarf::DW_FORM_sdata: return MCAsmInfo::getSLEB128Size(Integer); - default: llvm_unreachable("DIE Value form not supported yet"); break; + 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(); + default: llvm_unreachable("DIE Value form not supported yet"); } - return 0; } #ifndef NDEBUG -void DIEInteger::print(raw_ostream &O) { - O << "Int: " << (int64_t)Integer - << format(" 0x%llx", (unsigned long long)Integer); +void DIEInteger::print(raw_ostream &O) const { + O << "Int: " << (int64_t)Integer << " 0x"; + O.write_hex(Integer); } #endif //===----------------------------------------------------------------------===// -// DIEString Implementation +// DIEExpr Implementation //===----------------------------------------------------------------------===// -/// EmitValue - Emit string value. +/// EmitValue - Emit expression value. +/// +void DIEExpr::EmitValue(AsmPrinter *AP, dwarf::Form Form) const { + AP->OutStreamer.EmitValue(Expr, SizeOf(AP, Form)); +} + +/// SizeOf - Determine size of expression value in bytes. /// -void DIEString::EmitValue(AsmPrinter *AP, unsigned Form) const { - AP->OutStreamer.EmitBytes(Str, /*addrspace*/0); - // Emit nul terminator. - AP->OutStreamer.EmitIntValue(0, 1, /*addrspace*/0); +unsigned DIEExpr::SizeOf(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 DIEString::print(raw_ostream &O) { - O << "Str: \"" << Str << "\""; +void DIEExpr::print(raw_ostream &O) const { + O << "Expr: "; + Expr->print(O); } #endif @@ -257,19 +299,24 @@ void DIEString::print(raw_ostream &O) { /// EmitValue - Emit label value. /// -void DIELabel::EmitValue(AsmPrinter *AP, unsigned Form) const { - AP->OutStreamer.EmitSymbolValue(Label, SizeOf(AP, Form), 0/*AddrSpace*/); +void DIELabel::EmitValue(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::SizeOf(AsmPrinter *AP, unsigned Form) const { +unsigned DIELabel::SizeOf(AsmPrinter *AP, dwarf::Form Form) const { if (Form == dwarf::DW_FORM_data4) return 4; - return AP->getTargetData().getPointerSize(); + 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::print(raw_ostream &O) { +void DIELabel::print(raw_ostream &O) const { O << "Lbl: " << Label->getName(); } #endif @@ -280,36 +327,186 @@ void DIELabel::print(raw_ostream &O) { /// EmitValue - Emit delta value. /// -void DIEDelta::EmitValue(AsmPrinter *AP, unsigned Form) const { +void DIEDelta::EmitValue(AsmPrinter *AP, dwarf::Form Form) const { AP->EmitLabelDifference(LabelHi, LabelLo, SizeOf(AP, Form)); } /// SizeOf - Determine size of delta value in bytes. /// -unsigned DIEDelta::SizeOf(AsmPrinter *AP, unsigned Form) const { +unsigned DIEDelta::SizeOf(AsmPrinter *AP, dwarf::Form Form) const { if (Form == dwarf::DW_FORM_data4) return 4; - return AP->getTargetData().getPointerSize(); + 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::print(raw_ostream &O) { +void DIEDelta::print(raw_ostream &O) const { O << "Del: " << LabelHi->getName() << "-" << LabelLo->getName(); } #endif +//===----------------------------------------------------------------------===// +// DIEString Implementation +//===----------------------------------------------------------------------===// + +/// EmitValue - Emit string value. +/// +void DIEString::EmitValue(AsmPrinter *AP, dwarf::Form Form) const { + Access->EmitValue(AP, Form); +} + +/// SizeOf - Determine size of delta value in bytes. +/// +unsigned DIEString::SizeOf(AsmPrinter *AP, dwarf::Form Form) const { + return Access->SizeOf(AP, Form); +} + +#ifndef NDEBUG +void DIEString::print(raw_ostream &O) const { + O << "String: " << Str << "\tSymbol: "; + Access->print(O); +} +#endif + //===----------------------------------------------------------------------===// // DIEEntry Implementation //===----------------------------------------------------------------------===// +/// Emit something like ".long Hi+Offset-Lo" where the size in bytes of the +/// directive is specified by Size and Hi/Lo specify the labels. +static void emitLabelOffsetDifference(MCStreamer &Streamer, const MCSymbol *Hi, + uint64_t Offset, const MCSymbol *Lo, + unsigned Size) { + MCContext &Context = Streamer.getContext(); + + // Emit Hi+Offset - Lo + // Get the Hi+Offset expression. + const MCExpr *Plus = + MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(Hi, Context), + MCConstantExpr::Create(Offset, Context), Context); + + // Get the Hi+Offset-Lo expression. + const MCExpr *Diff = MCBinaryExpr::CreateSub( + Plus, MCSymbolRefExpr::Create(Lo, Context), Context); + + // Otherwise, emit with .set (aka assignment). + MCSymbol *SetLabel = Context.CreateTempSymbol(); + Streamer.EmitAssignment(SetLabel, Diff); + Streamer.EmitSymbolValue(SetLabel, Size); +} + /// EmitValue - Emit debug information entry offset. /// -void DIEEntry::EmitValue(AsmPrinter *AP, unsigned Form) const { - AP->EmitInt32(Entry->getOffset()); +void DIEEntry::EmitValue(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 + emitLabelOffsetDifference(AP->OutStreamer, CU->getSectionSym(), Addr, + CU->getSectionSym(), + DIEEntry::getRefAddrSize(AP)); + } else + AP->EmitInt32(Entry.getOffset()); +} + +unsigned DIEEntry::getRefAddrSize(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::print(raw_ostream &O) { - O << format("Die: 0x%lx", (long)(intptr_t)Entry); +void DIEEntry::print(raw_ostream &O) const { + O << format("Die: 0x%lx", (long)(intptr_t)&Entry); +} +#endif + +//===----------------------------------------------------------------------===// +// DIETypeSignature Implementation +//===----------------------------------------------------------------------===// +void DIETypeSignature::EmitValue(AsmPrinter *Asm, dwarf::Form Form) const { + assert(Form == dwarf::DW_FORM_ref_sig8); + Asm->OutStreamer.EmitIntValue(Unit.getTypeSignature(), 8); +} + +#ifndef NDEBUG +void DIETypeSignature::print(raw_ostream &O) const { + O << format("Type Unit: 0x%lx", Unit.getTypeSignature()); +} + +void DIETypeSignature::dump() const { print(dbgs()); } +#endif + +//===----------------------------------------------------------------------===// +// DIELoc Implementation +//===----------------------------------------------------------------------===// + +/// ComputeSize - calculate the size of the location expression. +/// +unsigned DIELoc::ComputeSize(AsmPrinter *AP) const { + if (!Size) { + const SmallVectorImpl &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::EmitValue(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 &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::SizeOf(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::print(raw_ostream &O) const { + O << "ExprLoc: "; + DIE::print(O, 5); } #endif @@ -319,9 +516,9 @@ void DIEEntry::print(raw_ostream &O) { /// ComputeSize - calculate the size of the block. /// -unsigned DIEBlock::ComputeSize(AsmPrinter *AP) { +unsigned DIEBlock::ComputeSize(AsmPrinter *AP) const { if (!Size) { - const SmallVector &AbbrevData = Abbrev.getData(); + const SmallVectorImpl &AbbrevData = Abbrev.getData(); for (unsigned i = 0, N = Values.size(); i < N; ++i) Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm()); } @@ -331,36 +528,66 @@ unsigned DIEBlock::ComputeSize(AsmPrinter *AP) { /// EmitValue - Emit block data. /// -void DIEBlock::EmitValue(AsmPrinter *Asm, unsigned Form) const { +void DIEBlock::EmitValue(AsmPrinter *Asm, dwarf::Form Form) const { switch (Form) { - default: assert(0 && "Improper form for block"); break; + 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 SmallVector &AbbrevData = Abbrev.getData(); + const SmallVectorImpl &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::SizeOf(AsmPrinter *AP, unsigned Form) const { +unsigned DIEBlock::SizeOf(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 + MCAsmInfo::getULEB128Size(Size); - default: llvm_unreachable("Improper form for block"); break; + case dwarf::DW_FORM_block: return Size + getULEB128Size(Size); + default: llvm_unreachable("Improper form for block"); } - return 0; } #ifndef NDEBUG -void DIEBlock::print(raw_ostream &O) { +void DIEBlock::print(raw_ostream &O) const { O << "Blk: "; DIE::print(O, 5); } #endif + +//===----------------------------------------------------------------------===// +// DIELocList Implementation +//===----------------------------------------------------------------------===// + +unsigned DIELocList::SizeOf(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::EmitValue(AsmPrinter *AP, dwarf::Form Form) const { + DwarfDebug *DD = AP->getDwarfDebug(); + MCSymbol *Label = DD->getDebugLocEntries()[Index].Label; + + if (AP->MAI->doesDwarfUseRelocationsAcrossSections() && !DD->useSplitDwarf()) + AP->EmitSectionOffset(Label, DD->getDebugLocSym()); + else + AP->EmitLabelDifference(Label, DD->getDebugLocSym(), 4); +} + +#ifndef NDEBUG +void DIELocList::print(raw_ostream &O) const { + O << "LocList: " << Index; + +} +#endif