AsmPrinterDwarf.cpp Source File (original) (raw)

25#include

26using namespace llvm;

28#define DEBUG_TYPE "asm-printer"

35 switch (Encoding) {

37 return "absptr";

39 return "omit";

41 return "pcrel";

43 return "uleb128";

45 return "sleb128";

47 return "udata4";

49 return "udata8";

51 return "sdata4";

53 return "sdata8";

55 return "pcrel udata4";

57 return "pcrel sdata4";

59 return "pcrel udata8";

61 return "pcrel sdata8";

63 :

64 return "indirect pcrel udata4";

66 :

67 return "indirect pcrel sdata4";

69 :

70 return "indirect pcrel udata8";

72 :

73 return "indirect pcrel sdata8";

76 return "indirect datarel sdata4";

79 return "indirect datarel sdata8";

80 }

82 return "";

83}

100

101

104 return 0;

105

106 switch (Encoding & 0x07) {

107 default:

110 return MAI->getCodePointerSize();

112 return 2;

114 return 4;

116 return 8;

117 }

118}

119

121 if (GV) {

123

127 } else

129}

130

132 bool ForceOffset) const {

133 if (!ForceOffset) {

134

135 if (MAI->needsDwarfSectionOffsetDirective()) {

137 "emitting DWARF64 is not implemented for COFF targets");

138 OutStreamer->emitCOFFSecRel32(Label, 0);

139 return;

140 }

141

142

145 return;

146 }

147 }

148

149

152}

153

158 return;

159 }

160

161

163}

164

168

173

175 const Twine &Comment) const {

177}

178

180 const Twine &Comment) const {

181 return OutStreamer->emitDwarfUnitLength(Prefix, Comment);

182}

183

185 unsigned Encoding) const {

186

189 else

191}

192

200

201

202

203

204

208 default:

212 break;

215 break;

218 break;

221 break;

225 break;

228 break;

231 break;

234 break;

237 break;

240 break;

243 break;

246 break;

250 break;

253 break;

256 break;

259 break;

262 break;

265 break;

266 }

267}

268

270

277

278

279 for (const auto &V : Die.values()) {

281 assert(V.getForm() && "Too many attributes for DIE (check abbreviation)");

282

285 if (Attr == dwarf::DW_AT_accessibility)

288 }

289

290

291 V.emitValue(this);

292 }

293

294

296 for (const auto &Child : Die.children())

298

299 OutStreamer->AddComment("End Of Children Mark");

301 }

302}

303

305

307

308

309 Abbrev.Emit(this);

310}

assert(UImm &&(UImm !=~static_cast< T >(0)) &&"Invalid immediate!")

static const char * DecodeDWARFEncoding(unsigned Encoding)

Definition AsmPrinterDwarf.cpp:34

This file contains constants used for implementing Dwarf debug support.

const TargetLoweringObjectFile & getObjFileLowering() const

Return information about object file lowering.

void emitULEB128(uint64_t Value, const char *Desc=nullptr, unsigned PadTo=0) const

Emit the specified unsigned leb128 value.

void emitDwarfSymbolReference(const MCSymbol *Label, bool ForceOffset=false) const

Emit a reference to a symbol for use in dwarf.

Definition AsmPrinterDwarf.cpp:131

unsigned GetSizeOfEncodedValue(unsigned Encoding) const

Return the size of the encoding in bytes.

Definition AsmPrinterDwarf.cpp:102

void emitDwarfDIE(const DIE &Die) const

Recursively emit Dwarf DIE tree.

Definition AsmPrinterDwarf.cpp:269

void emitDwarfLengthOrOffset(uint64_t Value) const

Emit 32- or 64-bit value depending on the DWARF format.

Definition AsmPrinterDwarf.cpp:169

void emitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset, unsigned Size, bool IsSectionRelative=false) const

Emit something like ".long Label+Offset" where the size in bytes of the directive is specified by Siz...

TargetMachine & TM

Target machine description.

void emitDwarfStringOffset(DwarfStringPoolEntry S) const

Emit the 4- or 8-byte offset of a string from the start of its section.

Definition AsmPrinterDwarf.cpp:154

void emitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo, unsigned Size) const

Emit something like ".long Hi-Lo" where the size in bytes of the directive is specified by Size and H...

virtual void emitTTypeReference(const GlobalValue *GV, unsigned Encoding)

Emit reference to a ttype global with a specified encoding.

Definition AsmPrinterDwarf.cpp:120

const MCAsmInfo * MAI

Target Asm Printer information.

void emitDwarfOffset(const MCSymbol *Label, uint64_t Offset) const

Emit something like ".long Label + Offset" or ".quad Label + Offset" depending on the DWARF format.

Definition AsmPrinterDwarf.cpp:165

void emitInt8(int Value) const

Emit a byte directive and value.

void emitDwarfUnitLength(uint64_t Length, const Twine &Comment) const

Emit a unit length field.

Definition AsmPrinterDwarf.cpp:174

void emitEncodingByte(unsigned Val, const char *Desc=nullptr) const

Emit a .byte 42 directive that corresponds to an encoding.

Definition AsmPrinterDwarf.cpp:89

MachineModuleInfo * MMI

This is a pointer to the current MachineModuleInfo.

void emitCFIInstruction(const MachineInstr &MI)

void emitCallSiteOffset(const MCSymbol *Hi, const MCSymbol *Lo, unsigned Encoding) const

Emit reference to a call site with a specified encoding.

Definition AsmPrinterDwarf.cpp:184

void emitDwarfAbbrev(const DIEAbbrev &Abbrev) const

Definition AsmPrinterDwarf.cpp:304

std::unique_ptr< MCStreamer > OutStreamer

This is the MCStreamer object for the file we are generating.

unsigned int getDwarfOffsetByteSize() const

Returns 4 for DWARF32 and 8 for DWARF64.

bool isVerbose() const

Return true if assembly output should contain comments.

bool doesDwarfUseRelocationsAcrossSections() const

void emitCallSiteValue(uint64_t Value, unsigned Encoding) const

Emit an integer value corresponding to the call site encoding.

Definition AsmPrinterDwarf.cpp:193

void emitLabelDifferenceAsULEB128(const MCSymbol *Hi, const MCSymbol *Lo) const

Emit something like ".uleb128 Hi-Lo".

Dwarf abbreviation, describes the organization of a debug information object.

unsigned getNumber() const

LLVM_ABI void Emit(const AsmPrinter *AP) const

Print the abbreviation using the specified asm printer.

A structured debug information entry.

unsigned getAbbrevNumber() const

unsigned getOffset() const

Get the compile/type unit relative offset of this DIE.

dwarf::Tag getTag() const

unsigned getAddressSpace() const

unsigned getRegister2() const

unsigned getRegister() const

OpType getOperation() const

StringRef getComment() const

StringRef getValues() const

int64_t getOffset() const

Base class for the full range of assembler expressions which are needed for parsing.

MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...

Represents a location in source code.

virtual const MCExpr * getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM, MachineModuleInfo *MMI, MCStreamer &Streamer) const

Return an MCExpr to use for a reference to the specified global variable from exception handling info...

Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...

static Twine utohexstr(uint64_t Val)

LLVM Value Representation.

LLVM_ABI StringRef AttributeString(unsigned Attribute)

LLVM_ABI StringRef TagString(unsigned Tag)

LLVM_ABI StringRef AccessibilityString(unsigned Access)

#define llvm_unreachable(msg)

Marks that the current location is not supposed to be reachable.

This is an optimization pass for GlobalISel generic memory operations.

Data for a string pool entry.