1 //===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCStreamer.h"
11 #include "llvm/ADT/SmallString.h"
12 #include "llvm/ADT/Twine.h"
13 #include "llvm/MC/MCAsmBackend.h"
14 #include "llvm/MC/MCAsmInfo.h"
15 #include "llvm/MC/MCContext.h"
16 #include "llvm/MC/MCExpr.h"
17 #include "llvm/MC/MCObjectFileInfo.h"
18 #include "llvm/MC/MCObjectWriter.h"
19 #include "llvm/MC/MCSymbol.h"
20 #include "llvm/MC/MCWin64EH.h"
21 #include "llvm/Support/ErrorHandling.h"
22 #include "llvm/Support/LEB128.h"
23 #include "llvm/Support/raw_ostream.h"
27 // Pin the vtables to this file.
28 MCTargetStreamer::~MCTargetStreamer() {}
30 MCTargetStreamer::MCTargetStreamer(MCStreamer &S) : Streamer(S) {
31 S.setTargetStreamer(this);
34 void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
36 void MCTargetStreamer::finish() {}
38 void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
40 MCStreamer::MCStreamer(MCContext &Ctx)
41 : Context(Ctx), CurrentWinFrameInfo(nullptr) {
42 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
45 MCStreamer::~MCStreamer() {
46 for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
47 delete WinFrameInfos[i];
50 void MCStreamer::reset() {
51 DwarfFrameInfos.clear();
52 for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
53 delete WinFrameInfos[i];
54 WinFrameInfos.clear();
55 CurrentWinFrameInfo = nullptr;
56 SymbolOrdering.clear();
58 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
61 raw_ostream &MCStreamer::GetCommentOS() {
62 // By default, discard comments.
66 void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
68 void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
69 for (auto &FI : DwarfFrameInfos)
70 FI.CompactUnwindEncoding =
71 (MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0);
74 /// EmitIntValue - Special case of EmitValue that avoids the client having to
75 /// pass in a MCExpr for constant integers.
76 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
77 assert(1 <= Size && Size <= 8 && "Invalid size");
78 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
81 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
82 for (unsigned i = 0; i != Size; ++i) {
83 unsigned index = isLittleEndian ? i : (Size - i - 1);
84 buf[i] = uint8_t(Value >> (index * 8));
86 EmitBytes(StringRef(buf, Size));
89 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
90 /// client having to pass in a MCExpr for constant integers.
91 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
93 raw_svector_ostream OSE(Tmp);
94 encodeULEB128(Value, OSE, Padding);
98 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
99 /// client having to pass in a MCExpr for constant integers.
100 void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
101 SmallString<128> Tmp;
102 raw_svector_ostream OSE(Tmp);
103 encodeSLEB128(Value, OSE);
104 EmitBytes(OSE.str());
107 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
109 EmitValueImpl(Value, Size, Loc);
112 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
113 bool IsSectionRelative) {
114 assert((!IsSectionRelative || Size == 4) &&
115 "SectionRelative value requires 4-bytes");
117 if (!IsSectionRelative)
118 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
120 EmitCOFFSecRel32(Sym);
123 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
124 report_fatal_error("unsupported directive in streamer");
127 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
128 report_fatal_error("unsupported directive in streamer");
131 /// EmitFill - Emit NumBytes bytes worth of the value specified by
132 /// FillValue. This implements directives such as '.space'.
133 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
134 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
135 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
139 /// The implementation in this class just redirects to EmitFill.
140 void MCStreamer::EmitZeros(uint64_t NumBytes) {
141 EmitFill(NumBytes, 0);
144 unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
146 StringRef Filename, unsigned CUID) {
147 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID);
150 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
151 unsigned Column, unsigned Flags,
153 unsigned Discriminator,
154 StringRef FileName) {
155 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
159 MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
160 MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
161 if (!Table.getLabel()) {
162 StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
164 Context.GetOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
166 return Table.getLabel();
169 MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
170 if (DwarfFrameInfos.empty())
172 return &DwarfFrameInfos.back();
175 void MCStreamer::EnsureValidDwarfFrame() {
176 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
177 if (!CurFrame || CurFrame->End)
178 report_fatal_error("No open frame");
181 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
182 MCSymbol *EHSymbol) {
185 void MCStreamer::InitSections(bool NoExecStack) {
186 SwitchSection(getContext().getObjectFileInfo()->getTextSection());
189 void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
191 Symbol->setSection(*Section);
193 Symbol->setUndefined();
195 // As we emit symbols into a section, track the order so that they can
196 // be sorted upon later. Zero is reserved to mean 'unemitted'.
197 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
200 void MCStreamer::EmitLabel(MCSymbol *Symbol) {
201 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
202 assert(getCurrentSection().first && "Cannot emit before setting section!");
203 AssignSection(Symbol, getCurrentSection().first);
205 MCTargetStreamer *TS = getTargetStreamer();
207 TS->emitLabel(Symbol);
210 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
214 void MCStreamer::EmitCFIStartProc(bool IsSimple) {
215 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
216 if (CurFrame && !CurFrame->End)
217 report_fatal_error("Starting a frame before finishing the previous one!");
219 MCDwarfFrameInfo Frame;
220 Frame.IsSimple = IsSimple;
221 EmitCFIStartProcImpl(Frame);
223 const MCAsmInfo* MAI = Context.getAsmInfo();
225 for (const MCCFIInstruction& Inst : MAI->getInitialFrameState()) {
226 if (Inst.getOperation() == MCCFIInstruction::OpDefCfa ||
227 Inst.getOperation() == MCCFIInstruction::OpDefCfaRegister) {
228 Frame.CurrentCfaRegister = Inst.getRegister();
233 DwarfFrameInfos.push_back(Frame);
236 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
239 void MCStreamer::EmitCFIEndProc() {
240 EnsureValidDwarfFrame();
241 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
242 EmitCFIEndProcImpl(*CurFrame);
245 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
246 // Put a dummy non-null value in Frame.End to mark that this frame has been
248 Frame.End = (MCSymbol *) 1;
251 MCSymbol *MCStreamer::EmitCFICommon() {
252 EnsureValidDwarfFrame();
253 MCSymbol *Label = getContext().CreateTempSymbol();
258 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
259 MCSymbol *Label = EmitCFICommon();
260 MCCFIInstruction Instruction =
261 MCCFIInstruction::createDefCfa(Label, Register, Offset);
262 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
263 CurFrame->Instructions.push_back(Instruction);
264 CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
267 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
268 MCSymbol *Label = EmitCFICommon();
269 MCCFIInstruction Instruction =
270 MCCFIInstruction::createDefCfaOffset(Label, Offset);
271 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
272 CurFrame->Instructions.push_back(Instruction);
275 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
276 MCSymbol *Label = EmitCFICommon();
277 MCCFIInstruction Instruction =
278 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
279 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
280 CurFrame->Instructions.push_back(Instruction);
283 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
284 MCSymbol *Label = EmitCFICommon();
285 MCCFIInstruction Instruction =
286 MCCFIInstruction::createDefCfaRegister(Label, Register);
287 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
288 CurFrame->Instructions.push_back(Instruction);
289 CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
292 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
293 MCSymbol *Label = EmitCFICommon();
294 MCCFIInstruction Instruction =
295 MCCFIInstruction::createOffset(Label, Register, Offset);
296 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
297 CurFrame->Instructions.push_back(Instruction);
300 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
301 MCSymbol *Label = EmitCFICommon();
302 MCCFIInstruction Instruction =
303 MCCFIInstruction::createRelOffset(Label, Register, Offset);
304 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
305 CurFrame->Instructions.push_back(Instruction);
308 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
310 EnsureValidDwarfFrame();
311 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
312 CurFrame->Personality = Sym;
313 CurFrame->PersonalityEncoding = Encoding;
316 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
317 EnsureValidDwarfFrame();
318 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
319 CurFrame->Lsda = Sym;
320 CurFrame->LsdaEncoding = Encoding;
323 void MCStreamer::EmitCFIRememberState() {
324 MCSymbol *Label = EmitCFICommon();
325 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
326 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
327 CurFrame->Instructions.push_back(Instruction);
330 void MCStreamer::EmitCFIRestoreState() {
331 // FIXME: Error if there is no matching cfi_remember_state.
332 MCSymbol *Label = EmitCFICommon();
333 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
334 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
335 CurFrame->Instructions.push_back(Instruction);
338 void MCStreamer::EmitCFISameValue(int64_t Register) {
339 MCSymbol *Label = EmitCFICommon();
340 MCCFIInstruction Instruction =
341 MCCFIInstruction::createSameValue(Label, Register);
342 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
343 CurFrame->Instructions.push_back(Instruction);
346 void MCStreamer::EmitCFIRestore(int64_t Register) {
347 MCSymbol *Label = EmitCFICommon();
348 MCCFIInstruction Instruction =
349 MCCFIInstruction::createRestore(Label, Register);
350 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
351 CurFrame->Instructions.push_back(Instruction);
354 void MCStreamer::EmitCFIEscape(StringRef Values) {
355 MCSymbol *Label = EmitCFICommon();
356 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
357 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
358 CurFrame->Instructions.push_back(Instruction);
361 void MCStreamer::EmitCFISignalFrame() {
362 EnsureValidDwarfFrame();
363 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
364 CurFrame->IsSignalFrame = true;
367 void MCStreamer::EmitCFIUndefined(int64_t Register) {
368 MCSymbol *Label = EmitCFICommon();
369 MCCFIInstruction Instruction =
370 MCCFIInstruction::createUndefined(Label, Register);
371 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
372 CurFrame->Instructions.push_back(Instruction);
375 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
376 MCSymbol *Label = EmitCFICommon();
377 MCCFIInstruction Instruction =
378 MCCFIInstruction::createRegister(Label, Register1, Register2);
379 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
380 CurFrame->Instructions.push_back(Instruction);
383 void MCStreamer::EmitCFIWindowSave() {
384 MCSymbol *Label = EmitCFICommon();
385 MCCFIInstruction Instruction =
386 MCCFIInstruction::createWindowSave(Label);
387 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
388 CurFrame->Instructions.push_back(Instruction);
391 void MCStreamer::EnsureValidWinFrameInfo() {
392 if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End)
393 report_fatal_error("No open Win64 EH frame function!");
396 void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
397 if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
398 report_fatal_error("Starting a function before ending the previous one!");
400 MCSymbol *StartProc = getContext().CreateTempSymbol();
401 EmitLabel(StartProc);
403 WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc));
404 CurrentWinFrameInfo = WinFrameInfos.back();
407 void MCStreamer::EmitWinCFIEndProc() {
408 EnsureValidWinFrameInfo();
409 if (CurrentWinFrameInfo->ChainedParent)
410 report_fatal_error("Not all chained regions terminated!");
412 MCSymbol *Label = getContext().CreateTempSymbol();
414 CurrentWinFrameInfo->End = Label;
417 void MCStreamer::EmitWinCFIStartChained() {
418 EnsureValidWinFrameInfo();
420 MCSymbol *StartProc = getContext().CreateTempSymbol();
421 EmitLabel(StartProc);
423 WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function,
424 StartProc, CurrentWinFrameInfo));
425 CurrentWinFrameInfo = WinFrameInfos.back();
428 void MCStreamer::EmitWinCFIEndChained() {
429 EnsureValidWinFrameInfo();
430 if (!CurrentWinFrameInfo->ChainedParent)
431 report_fatal_error("End of a chained region outside a chained region!");
433 MCSymbol *Label = getContext().CreateTempSymbol();
436 CurrentWinFrameInfo->End = Label;
437 CurrentWinFrameInfo =
438 const_cast<WinEH::FrameInfo *>(CurrentWinFrameInfo->ChainedParent);
441 void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
443 EnsureValidWinFrameInfo();
444 if (CurrentWinFrameInfo->ChainedParent)
445 report_fatal_error("Chained unwind areas can't have handlers!");
446 CurrentWinFrameInfo->ExceptionHandler = Sym;
447 if (!Except && !Unwind)
448 report_fatal_error("Don't know what kind of handler this is!");
450 CurrentWinFrameInfo->HandlesUnwind = true;
452 CurrentWinFrameInfo->HandlesExceptions = true;
455 void MCStreamer::EmitWinEHHandlerData() {
456 EnsureValidWinFrameInfo();
457 if (CurrentWinFrameInfo->ChainedParent)
458 report_fatal_error("Chained unwind areas can't have handlers!");
461 void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
462 EnsureValidWinFrameInfo();
464 MCSymbol *Label = getContext().CreateTempSymbol();
467 WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register);
468 CurrentWinFrameInfo->Instructions.push_back(Inst);
471 void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
472 EnsureValidWinFrameInfo();
473 if (CurrentWinFrameInfo->LastFrameInst >= 0)
474 report_fatal_error("Frame register and offset already specified!");
476 report_fatal_error("Misaligned frame pointer offset!");
478 report_fatal_error("Frame offset must be less than or equal to 240!");
480 MCSymbol *Label = getContext().CreateTempSymbol();
483 WinEH::Instruction Inst =
484 Win64EH::Instruction::SetFPReg(Label, Register, Offset);
485 CurrentWinFrameInfo->LastFrameInst = CurrentWinFrameInfo->Instructions.size();
486 CurrentWinFrameInfo->Instructions.push_back(Inst);
489 void MCStreamer::EmitWinCFIAllocStack(unsigned Size) {
490 EnsureValidWinFrameInfo();
492 report_fatal_error("Allocation size must be non-zero!");
494 report_fatal_error("Misaligned stack allocation!");
496 MCSymbol *Label = getContext().CreateTempSymbol();
499 WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
500 CurrentWinFrameInfo->Instructions.push_back(Inst);
503 void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
504 EnsureValidWinFrameInfo();
506 report_fatal_error("Misaligned saved register offset!");
508 MCSymbol *Label = getContext().CreateTempSymbol();
511 WinEH::Instruction Inst =
512 Win64EH::Instruction::SaveNonVol(Label, Register, Offset);
513 CurrentWinFrameInfo->Instructions.push_back(Inst);
516 void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
517 EnsureValidWinFrameInfo();
519 report_fatal_error("Misaligned saved vector register offset!");
521 MCSymbol *Label = getContext().CreateTempSymbol();
524 WinEH::Instruction Inst =
525 Win64EH::Instruction::SaveXMM(Label, Register, Offset);
526 CurrentWinFrameInfo->Instructions.push_back(Inst);
529 void MCStreamer::EmitWinCFIPushFrame(bool Code) {
530 EnsureValidWinFrameInfo();
531 if (CurrentWinFrameInfo->Instructions.size() > 0)
532 report_fatal_error("If present, PushMachFrame must be the first UOP");
534 MCSymbol *Label = getContext().CreateTempSymbol();
537 WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
538 CurrentWinFrameInfo->Instructions.push_back(Inst);
541 void MCStreamer::EmitWinCFIEndProlog() {
542 EnsureValidWinFrameInfo();
544 MCSymbol *Label = getContext().CreateTempSymbol();
547 CurrentWinFrameInfo->PrologEnd = Label;
550 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
553 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
556 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
557 /// the specified string in the output .s file. This capability is
558 /// indicated by the hasRawTextSupport() predicate.
559 void MCStreamer::EmitRawTextImpl(StringRef String) {
560 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
561 " something must not be fully mc'ized\n";
565 void MCStreamer::EmitRawText(const Twine &T) {
566 SmallString<128> Str;
567 EmitRawTextImpl(T.toStringRef(Str));
570 void MCStreamer::EmitWindowsUnwindTables() {
573 void MCStreamer::Finish() {
574 if (!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End)
575 report_fatal_error("Unfinished frame!");
577 MCTargetStreamer *TS = getTargetStreamer();
584 void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
585 visitUsedExpr(*Value);
586 Symbol->setVariableValue(Value);
588 MCTargetStreamer *TS = getTargetStreamer();
590 TS->emitAssignment(Symbol, Value);
593 void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
596 void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
597 switch (Expr.getKind()) {
599 cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
602 case MCExpr::Constant:
605 case MCExpr::Binary: {
606 const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
607 visitUsedExpr(*BE.getLHS());
608 visitUsedExpr(*BE.getRHS());
612 case MCExpr::SymbolRef:
613 visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
617 visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
622 void MCStreamer::EmitInstruction(const MCInst &Inst,
623 const MCSubtargetInfo &STI) {
625 for (unsigned i = Inst.getNumOperands(); i--;)
626 if (Inst.getOperand(i).isExpr())
627 visitUsedExpr(*Inst.getOperand(i).getExpr());
630 void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
631 void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
632 void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
633 void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
634 void MCStreamer::EndCOFFSymbolDef() {}
635 void MCStreamer::EmitFileDirective(StringRef Filename) {}
636 void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
637 void MCStreamer::EmitCOFFSymbolType(int Type) {}
638 void MCStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
639 void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
640 unsigned ByteAlignment) {}
641 void MCStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
642 uint64_t Size, unsigned ByteAlignment) {}
643 void MCStreamer::ChangeSection(const MCSection *, const MCExpr *) {}
644 void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
645 void MCStreamer::EmitBytes(StringRef Data) {}
646 void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
648 visitUsedExpr(*Value);
650 void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
651 void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
652 void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
654 unsigned MaxBytesToEmit) {}
655 void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
656 unsigned MaxBytesToEmit) {}
657 bool MCStreamer::EmitValueToOffset(const MCExpr *Offset, unsigned char Value) {
660 void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
661 void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
662 void MCStreamer::FinishImpl() {}
663 void MCStreamer::EmitBundleUnlock() {}