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Teach our Dwarf emission to use the string pool.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143097 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2011-10-27 06:44:11 +00:00
parent fd58cd7563
commit 390c40d96a
14 changed files with 139 additions and 54 deletions
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5
include/llvm/CodeGen/AsmPrinter.h
View File

@ -194,6 +194,11 @@ namespace llvm {
bool needsSEHMoves();
/// needsRelocationsForDwarfStringPool - Specifies whether the object format
/// expects to use relocations to refer to debug entries. Alternatively we
/// emit section offsets in bytes from the start of the string pool.
bool needsRelocationsForDwarfStringPool() const;
/// EmitConstantPool - Print to the current output stream assembly
/// representations of the constants in the constant pool MCP. This is
/// used to print out constants which have been "spilled to memory" by

7
include/llvm/MC/MCAsmInfo.h
View File

@ -330,6 +330,10 @@ namespace llvm {
/// use EmitLabelOffsetDifference.
bool DwarfUsesLabelOffsetForRanges;
/// DwarfUsesRelocationsForStringPool - True if this Dwarf output must use
/// relocations to refer to entries in the string pool.
bool DwarfUsesRelocationsForStringPool;
/// DwarfRegNumForCFI - True if dwarf register numbers are printed
/// instead of symbolic register names in .cfi_* directives.
bool DwarfRegNumForCFI; // Defaults to false;
@ -566,6 +570,9 @@ namespace llvm {
bool doesDwarfUsesLabelOffsetForRanges() const {
return DwarfUsesLabelOffsetForRanges;
}
bool doesDwarfUseRelocationsForStringPool() const {
return DwarfUsesRelocationsForStringPool;
}
bool useDwarfRegNumForCFI() const {
return DwarfRegNumForCFI;
}

5
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
View File

@ -613,6 +613,10 @@ bool AsmPrinter::needsSEHMoves() {
MF->getFunction()->needsUnwindTableEntry();
}
bool AsmPrinter::needsRelocationsForDwarfStringPool() const {
return MAI->doesDwarfUseRelocationsForStringPool();
}
void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
MCSymbol *Label = MI.getOperand(0).getMCSymbol();
@ -2092,4 +2096,3 @@ GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
report_fatal_error("no GCMetadataPrinter registered for GC: " + Twine(Name));
return 0;
}

2
lib/CodeGen/AsmPrinter/DIE.cpp
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@ -267,6 +267,7 @@ void DIELabel::EmitValue(AsmPrinter *AP, unsigned Form) const {
///
unsigned DIELabel::SizeOf(AsmPrinter *AP, unsigned Form) const {
if (Form == dwarf::DW_FORM_data4) return 4;
if (Form == dwarf::DW_FORM_strp) return 4;
return AP->getTargetData().getPointerSize();
}
@ -290,6 +291,7 @@ void DIEDelta::EmitValue(AsmPrinter *AP, unsigned Form) const {
///
unsigned DIEDelta::SizeOf(AsmPrinter *AP, unsigned Form) const {
if (Form == dwarf::DW_FORM_data4) return 4;
if (Form == dwarf::DW_FORM_strp) return 4;
return AP->getTargetData().getPointerSize();
}

61
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
View File

@ -69,10 +69,21 @@ void CompileUnit::addSInt(DIE *Die, unsigned Attribute,
/// addString - Add a string attribute data and value. DIEString only
/// keeps string reference.
void CompileUnit::addString(DIE *Die, unsigned Attribute, unsigned Form,
StringRef String) {
DIEValue *Value = new (DIEValueAllocator) DIEString(String);
Die->addValue(Attribute, Form, Value);
void CompileUnit::addString(DIE *Die, unsigned Attribute, StringRef String) {
if (String.size() > 3) {
MCSymbol *Symb = DD->getStringPoolEntry(String);
DIEValue *Value;
if (Asm->needsRelocationsForDwarfStringPool())
Value = new (DIEValueAllocator) DIELabel(Symb);
else {
MCSymbol *StringPool = DD->getStringPool();
Value = new (DIEValueAllocator) DIEDelta(Symb, StringPool);
}
Die->addValue(Attribute, dwarf::DW_FORM_strp, Value);
} else {
DIEValue *Value = new (DIEValueAllocator) DIEString(String);
Die->addValue(Attribute, dwarf::DW_FORM_string, Value);
}
}
/// addLabel - Add a Dwarf label attribute data and value.
@ -479,7 +490,7 @@ bool CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO,
/// addConstantFPValue - Add constant value entry in variable DIE.
bool CompileUnit::addConstantFPValue(DIE *Die, const MachineOperand &MO) {
assert(MO.isFPImm() && "Invalid machine operand!");
assert (MO.isFPImm() && "Invalid machine operand!");
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
APFloat FPImm = MO.getFPImm()->getValueAPF();
@ -660,7 +671,7 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DIBasicType BTy) {
StringRef Name = BTy.getName();
// Add name if not anonymous or intermediate type.
if (!Name.empty())
addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
addString(&Buffer, dwarf::DW_AT_name, Name);
if (BTy.getTag() == dwarf::DW_TAG_unspecified_type) {
Buffer.setTag(dwarf::DW_TAG_unspecified_type);
@ -694,7 +705,7 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) {
// Add name if not anonymous or intermediate type.
if (!Name.empty())
addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
addString(&Buffer, dwarf::DW_AT_name, Name);
// Add size if non-zero (derived types might be zero-sized.)
if (Size)
@ -791,8 +802,7 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
else if (Element.isVariable()) {
DIVariable DV(Element);
ElemDie = new DIE(dwarf::DW_TAG_variable);
addString(ElemDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
DV.getName());
addString(ElemDie, dwarf::DW_AT_name, DV.getName());
addType(ElemDie, DV.getType());
addUInt(ElemDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
addUInt(ElemDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
@ -836,7 +846,7 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
// Add name if not anonymous or intermediate type.
if (!Name.empty())
addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
addString(&Buffer, dwarf::DW_AT_name, Name);
if (Tag == dwarf::DW_TAG_enumeration_type || Tag == dwarf::DW_TAG_class_type
|| Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type)
@ -868,7 +878,7 @@ CompileUnit::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) {
ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter);
addType(ParamDIE, TP.getType());
addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TP.getName());
addString(ParamDIE, dwarf::DW_AT_name, TP.getName());
return ParamDIE;
}
@ -883,7 +893,7 @@ CompileUnit::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TPV)
ParamDIE = new DIE(dwarf::DW_TAG_template_value_parameter);
addType(ParamDIE, TPV.getType());
if (!TPV.getName().empty())
addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TPV.getName());
addString(ParamDIE, dwarf::DW_AT_name, TPV.getName());
addUInt(ParamDIE, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata,
TPV.getValue());
return ParamDIE;
@ -897,7 +907,7 @@ DIE *CompileUnit::getOrCreateNameSpace(DINameSpace NS) {
NDie = new DIE(dwarf::DW_TAG_namespace);
insertDIE(NS, NDie);
if (!NS.getName().empty())
addString(NDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, NS.getName());
addString(NDie, dwarf::DW_AT_name, NS.getName());
addSourceLine(NDie, NS);
addToContextOwner(NDie, NS.getContext());
return NDie;
@ -932,7 +942,7 @@ DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
StringRef LinkageName = SP.getLinkageName();
if (!LinkageName.empty())
addString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
addString(SPDie, dwarf::DW_AT_MIPS_linkage_name,
getRealLinkageName(LinkageName));
// If this DIE is going to refer declaration info using AT_specification
@ -942,7 +952,7 @@ DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
// Constructors and operators for anonymous aggregates do not have names.
if (!SP.getName().empty())
addString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, SP.getName());
addString(SPDie, dwarf::DW_AT_name, SP.getName());
addSourceLine(SPDie, SP);
@ -1048,13 +1058,12 @@ void CompileUnit::createGlobalVariableDIE(const MDNode *N) {
insertDIE(N, VariableDIE);
// Add name.
addString(VariableDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string,
GV.getDisplayName());
addString(VariableDIE, dwarf::DW_AT_name, GV.getDisplayName());
StringRef LinkageName = GV.getLinkageName();
bool isGlobalVariable = GV.getGlobal() != NULL;
if (!LinkageName.empty() && isGlobalVariable)
addString(VariableDIE, dwarf::DW_AT_MIPS_linkage_name,
dwarf::DW_FORM_string, getRealLinkageName(LinkageName));
getRealLinkageName(LinkageName));
// Add type.
DIType GTy = GV.getType();
addType(VariableDIE, GTy);
@ -1170,7 +1179,7 @@ void CompileUnit::constructArrayTypeDIE(DIE &Buffer,
DIE *CompileUnit::constructEnumTypeDIE(DIEnumerator ETy) {
DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
StringRef Name = ETy.getName();
addString(Enumerator, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
addString(Enumerator, dwarf::DW_AT_name, Name);
int64_t Value = ETy.getEnumValue();
addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
return Enumerator;
@ -1207,8 +1216,7 @@ DIE *CompileUnit::constructVariableDIE(DbgVariable *DV, bool isScopeAbstract) {
addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin,
dwarf::DW_FORM_ref4, AbsDIE);
else {
addString(VariableDie, dwarf::DW_AT_name,
dwarf::DW_FORM_string, Name);
addString(VariableDie, dwarf::DW_AT_name, Name);
addSourceLine(VariableDie, DV->getVariable());
addType(VariableDie, DV->getType());
}
@ -1303,7 +1311,7 @@ DIE *CompileUnit::createMemberDIE(DIDerivedType DT) {
DIE *MemberDie = new DIE(DT.getTag());
StringRef Name = DT.getName();
if (!Name.empty())
addString(MemberDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
addString(MemberDie, dwarf::DW_AT_name, Name);
addType(MemberDie, DT.getTypeDerivedFrom());
@ -1377,16 +1385,13 @@ DIE *CompileUnit::createMemberDIE(DIDerivedType DT) {
// Objective-C properties.
StringRef PropertyName = DT.getObjCPropertyName();
if (!PropertyName.empty()) {
addString(MemberDie, dwarf::DW_AT_APPLE_property_name, dwarf::DW_FORM_string,
PropertyName);
addString(MemberDie, dwarf::DW_AT_APPLE_property_name, PropertyName);
StringRef GetterName = DT.getObjCPropertyGetterName();
if (!GetterName.empty())
addString(MemberDie, dwarf::DW_AT_APPLE_property_getter,
dwarf::DW_FORM_string, GetterName);
addString(MemberDie, dwarf::DW_AT_APPLE_property_getter, GetterName);
StringRef SetterName = DT.getObjCPropertySetterName();
if (!SetterName.empty())
addString(MemberDie, dwarf::DW_AT_APPLE_property_setter,
dwarf::DW_FORM_string, SetterName);
addString(MemberDie, dwarf::DW_AT_APPLE_property_setter, SetterName);
unsigned PropertyAttributes = 0;
if (DT.isReadOnlyObjCProperty())
PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readonly;

3
lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
View File

@ -150,8 +150,7 @@ public:
/// addString - Add a string attribute data and value.
///
void addString(DIE *Die, unsigned Attribute, unsigned Form,
const StringRef Str);
void addString(DIE *Die, unsigned Attribute, const StringRef Str);
/// addLabel - Add a Dwarf label attribute data and value.
///

15
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -136,6 +136,10 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
DwarfDebug::~DwarfDebug() {
}
MCSymbol *DwarfDebug::getStringPool() {
return Asm->GetTempSymbol("section_str");
}
MCSymbol *DwarfDebug::getStringPoolEntry(StringRef Str) {
std::pair<MCSymbol*, unsigned> &Entry = StringPool[Str];
if (Entry.first) return Entry.first;
@ -467,11 +471,10 @@ CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) {
DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
CompileUnit *NewCU = new CompileUnit(ID, Die, Asm, this);
NewCU->addString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string,
DIUnit.getProducer());
NewCU->addString(Die, dwarf::DW_AT_producer, DIUnit.getProducer());
NewCU->addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data2,
DIUnit.getLanguage());
NewCU->addString(Die, dwarf::DW_AT_name, dwarf::DW_FORM_string, FN);
NewCU->addString(Die, dwarf::DW_AT_name, FN);
// Use DW_AT_entry_pc instead of DW_AT_low_pc/DW_AT_high_pc pair. This
// simplifies debug range entries.
NewCU->addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_addr, 0);
@ -484,14 +487,13 @@ CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) {
NewCU->addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
if (!Dir.empty())
NewCU->addString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir);
NewCU->addString(Die, dwarf::DW_AT_comp_dir, Dir);
if (DIUnit.isOptimized())
NewCU->addUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
StringRef Flags = DIUnit.getFlags();
if (!Flags.empty())
NewCU->addString(Die, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string,
Flags);
NewCU->addString(Die, dwarf::DW_AT_APPLE_flags, Flags);
if (unsigned RVer = DIUnit.getRunTimeVersion())
NewCU->addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers,
@ -1796,6 +1798,7 @@ void DwarfDebug::emitDebugStr() {
// Emit the string itself.
Asm->OutStreamer.EmitBytes(Entries[i].second->getKey(), 0/*addrspace*/);
Asm->OutStreamer.EmitZeros(1, 0);
}
}

9
lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -216,8 +216,6 @@ class DwarfDebug {
StringMap<std::pair<MCSymbol*, unsigned> > StringPool;
unsigned NextStringPoolNumber;
MCSymbol *getStringPoolEntry(StringRef Str);
/// SectionMap - Provides a unique id per text section.
///
UniqueVector<const MCSection*> SectionMap;
@ -504,6 +502,13 @@ public:
/// createSubprogramDIE - Create new DIE using SP.
DIE *createSubprogramDIE(DISubprogram SP);
/// getStringPool - returns the entry into the start of the pool.
MCSymbol *getStringPool();
/// getStringPoolEntry - returns an entry into the string pool with the given
/// string text.
MCSymbol *getStringPoolEntry(StringRef Str);
};
} // End of namespace llvm

1
lib/MC/MCAsmInfo.cpp
View File

@ -91,6 +91,7 @@ MCAsmInfo::MCAsmInfo() {
DwarfRequiresRelocationForSectionOffset = true;
DwarfSectionOffsetDirective = 0;
DwarfUsesLabelOffsetForRanges = true;
DwarfUsesRelocationsForStringPool = true;
DwarfRegNumForCFI = false;
HasMicrosoftFastStdCallMangling = false;

1
lib/MC/MCAsmInfoDarwin.cpp
View File

@ -66,4 +66,5 @@ MCAsmInfoDarwin::MCAsmInfoDarwin() {
DwarfRequiresRelocationForSectionOffset = false;
DwarfUsesLabelOffsetForRanges = false;
DwarfUsesRelocationsForStringPool = false;
}

4
test/CodeGen/ARM/debug-info-sreg2.ll
View File

@ -6,8 +6,8 @@ target triple = "thumbv7-apple-macosx10.6.7"
;CHECK: Ldebug_loc0:
;CHECK-NEXT: .long Ltmp1
;CHECK-NEXT: .long Ltmp2
;CHECK-NEXT: Lset8 = Ltmp10-Ltmp9 @ Loc expr size
;CHECK-NEXT: .short Lset8
;CHECK-NEXT: Lset[[N:[0-9]+]] = Ltmp10-Ltmp9 @ Loc expr size
;CHECK-NEXT: .short Lset[[N]]
;CHECK-NEXT: Ltmp9:
;CHECK-NEXT: .byte 144 @ DW_OP_regx for S register

6
test/CodeGen/X86/2010-06-28-DbgEntryPC.ll
View File

@ -5,17 +5,17 @@
; CHECK: .byte 17 ## DW_TAG_compile_unit
; CHECK-NEXT: .byte 1 ## DW_CHILDREN_yes
; CHECK-NEXT: .byte 37 ## DW_AT_producer
; CHECK-NEXT: .byte 8 ## DW_FORM_string
; CHECK-NEXT: .byte 14 ## DW_FORM_strp
; CHECK-NEXT: .byte 19 ## DW_AT_language
; CHECK-NEXT: .byte 5 ## DW_FORM_data2
; CHECK-NEXT: .byte 3 ## DW_AT_name
; CHECK-NEXT: .byte 8 ## DW_FORM_string
; CHECK-NEXT: .byte 14 ## DW_FORM_strp
; CHECK-NEXT: .byte 82 ## DW_AT_entry_pc
; CHECK-NEXT: .byte 1 ## DW_FORM_addr
; CHECK-NEXT: .byte 16 ## DW_AT_stmt_list
; CHECK-NEXT: .byte 6 ## DW_FORM_data4
; CHECK-NEXT: .byte 27 ## DW_AT_comp_dir
; CHECK-NEXT: .byte 8 ## DW_FORM_string
; CHECK-NEXT: .byte 14 ## DW_FORM_strp
; CHECK-NEXT: .byte 225 ## DW_AT_APPLE_optimized
%struct.a = type { i32, %struct.a* }

20
test/DebugInfo/2011-09-26-GlobalVarContext.ll
View File

@ -2,14 +2,14 @@
; ModuleID = 'test.c'
@GLOBAL = common global i32 0, align 4
@GLB = common global i32 0, align 4
define i32 @f() nounwind {
%LOCAL = alloca i32, align 4
call void @llvm.dbg.declare(metadata !{i32* %LOCAL}, metadata !15), !dbg !17
%1 = load i32* @GLOBAL, align 4, !dbg !18
store i32 %1, i32* %LOCAL, align 4, !dbg !18
%2 = load i32* @GLOBAL, align 4, !dbg !19
%LOC = alloca i32, align 4
call void @llvm.dbg.declare(metadata !{i32* %LOC}, metadata !15), !dbg !17
%1 = load i32* @GLB, align 4, !dbg !18
store i32 %1, i32* %LOC, align 4, !dbg !18
%2 = load i32* @GLB, align 4, !dbg !19
ret i32 %2, !dbg !19
}
@ -31,17 +31,17 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
!11 = metadata !{i32 720932} ; [ DW_TAG_base_type ]
!12 = metadata !{metadata !13}
!13 = metadata !{metadata !14}
!14 = metadata !{i32 720948, i32 0, null, metadata !"GLOBAL", metadata !"GLOBAL", metadata !"", metadata !6, i32 1, metadata !9, i32 0, i32 1, i32* @GLOBAL} ; [ DW_TAG_variable ]
!15 = metadata !{i32 721152, metadata !16, metadata !"LOCAL", metadata !6, i32 4, metadata !9, i32 0, i32 0} ; [ DW_TAG_auto_variable ]
!14 = metadata !{i32 720948, i32 0, null, metadata !"GLB", metadata !"GLB", metadata !"", metadata !6, i32 1, metadata !9, i32 0, i32 1, i32* @GLB} ; [ DW_TAG_variable ]
!15 = metadata !{i32 721152, metadata !16, metadata !"LOC", metadata !6, i32 4, metadata !9, i32 0, i32 0} ; [ DW_TAG_auto_variable ]
!16 = metadata !{i32 720907, metadata !5, i32 3, i32 9, metadata !6, i32 0} ; [ DW_TAG_lexical_block ]
!17 = metadata !{i32 4, i32 9, metadata !16, null}
!18 = metadata !{i32 4, i32 23, metadata !16, null}
!19 = metadata !{i32 5, i32 5, metadata !16, null}
; CHECK: .ascii "GLOBAL"
; CHECK: .ascii "GLB"
; CHECK: .byte 1
; CHECK: .byte 1
; CHECK: .ascii "LOCAL"
; CHECK: .ascii "LOC"
; CHECK: .byte 1
; CHECK: .byte 4

54
test/DebugInfo/stringpool.ll Normal file
View File

@ -0,0 +1,54 @@
; RUN: llc -O0 -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s --check-prefix=LINUX
; RUN: llc -O0 -mtriple=x86_64-darwin < %s | FileCheck %s --check-prefix=DARWIN
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@x = common global i32 0, align 4
@yyyyyyyy = common global i32 0, align 4
!llvm.dbg.cu = !{!0}
!0 = metadata !{i32 720913, i32 0, i32 12, metadata !"hello.c", metadata !"/home/nlewycky", metadata !"clang version 3.1 (trunk 143048)", i1 true, i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ]
!1 = metadata !{metadata !2}
!2 = metadata !{i32 0}
!3 = metadata !{metadata !4}
!4 = metadata !{metadata !5, metadata !8}
!5 = metadata !{i32 720948, i32 0, null, metadata !"x", metadata !"x", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, i32* @x} ; [ DW_TAG_variable ]
!6 = metadata !{i32 720937, metadata !"hello.c", metadata !"/home/nlewycky", null} ; [ DW_TAG_file_type ]
!7 = metadata !{i32 720932, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
!8 = metadata !{i32 720948, i32 0, null, metadata !"yyyyyyyy", metadata !"yyyyyyyy", metadata !"", metadata !6, i32 2, metadata !7, i32 0, i32 1, i32* @yyyyyyyy} ; [ DW_TAG_variable ]
; 120 is ASCII 'x'. Verify that we use it directly as its name and don't emit
; a reference to the string pool.
; LINUX: .byte 120 # DW_AT_name
; DARWIN: .byte 120 ## DW_AT_name
; Verify that we refer to 'yyyyyyyy' with a relocation.
; LINUX: .long .Lstring{{[0-9]+}} # DW_AT_name
; LINUX-NEXT: .long 39 # DW_AT_type
; LINUX-NEXT: .byte 1 # DW_AT_external
; LINUX-NEXT: .byte 1 # DW_AT_decl_file
; LINUX-NEXT: .byte 2 # DW_AT_decl_line
; LINUX-NEXT: .byte 9 # DW_AT_location
; LINUX-NEXT: .byte 3
; LINUX-NEXT: .quad yyyyyyyy
; Verify that we refer to 'yyyyyyyy' without a relocation.
; DARWIN: Lset[[N:[0-9]+]] = Lstring{{[0-9]+}}-Lsection_str ## DW_AT_name
; DARWIN-NEXT: .long Lset[[N]]
; DARWIN-NEXT: .long 39 ## DW_AT_type
; DARWIN-NEXT: .byte 1 ## DW_AT_external
; DARWIN-NEXT: .byte 1 ## DW_AT_decl_file
; DARWIN-NEXT: .byte 2 ## DW_AT_decl_line
; DARWIN-NEXT: .byte 9 ## DW_AT_location
; DARWIN-NEXT: .byte 3
; DARWIN-NEXT: .quad _yyyyyyyy
; Verify that "yyyyyyyy" ended up in the stringpool.
; LINUX: .section .debug_str,"MS",@progbits,1
; LINUX-NOT: .section
; LINUX: yyyyyyyy
; DARWIN: .section __DWARF,__debug_str,regular,debug
; DARWIN-NOT: .section
; DARWIN: yyyyyyyy