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 for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
52 delete WinFrameInfos[i];
53 WinFrameInfos.clear();
54 CurrentWinFrameInfo = nullptr;
56 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
59 raw_ostream &MCStreamer::GetCommentOS() {
60 // By default, discard comments.
64 void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
66 void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
67 for (auto &FI : DwarfFrameInfos)
68 FI.CompactUnwindEncoding =
69 (MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0);
72 /// EmitIntValue - Special case of EmitValue that avoids the client having to
73 /// pass in a MCExpr for constant integers.
74 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
75 assert(1 <= Size && Size <= 8 && "Invalid size");
76 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
79 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
80 for (unsigned i = 0; i != Size; ++i) {
81 unsigned index = isLittleEndian ? i : (Size - i - 1);
82 buf[i] = uint8_t(Value >> (index * 8));
84 EmitBytes(StringRef(buf, Size));
87 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
88 /// client having to pass in a MCExpr for constant integers.
89 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
91 raw_svector_ostream OSE(Tmp);
92 encodeULEB128(Value, OSE, Padding);
96 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
97 /// client having to pass in a MCExpr for constant integers.
98 void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
100 raw_svector_ostream OSE(Tmp);
101 encodeSLEB128(Value, OSE);
102 EmitBytes(OSE.str());
105 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
107 EmitValueImpl(Value, Size, Loc);
110 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
111 bool IsSectionRelative) {
112 assert((!IsSectionRelative || Size == 4) &&
113 "SectionRelative value requires 4-bytes");
115 if (!IsSectionRelative)
116 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
118 EmitCOFFSecRel32(Sym);
121 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
122 report_fatal_error("unsupported directive in streamer");
125 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
126 report_fatal_error("unsupported directive in streamer");
129 /// EmitFill - Emit NumBytes bytes worth of the value specified by
130 /// FillValue. This implements directives such as '.space'.
131 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
132 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
133 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
137 /// The implementation in this class just redirects to EmitFill.
138 void MCStreamer::EmitZeros(uint64_t NumBytes) {
139 EmitFill(NumBytes, 0);
142 unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
144 StringRef Filename, unsigned CUID) {
145 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID);
148 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
149 unsigned Column, unsigned Flags,
151 unsigned Discriminator,
152 StringRef FileName) {
153 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
157 MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
158 MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
159 if (!Table.getLabel()) {
160 StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
162 Context.GetOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
164 return Table.getLabel();
167 MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
168 if (DwarfFrameInfos.empty())
170 return &DwarfFrameInfos.back();
173 void MCStreamer::EnsureValidDwarfFrame() {
174 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
175 if (!CurFrame || CurFrame->End)
176 report_fatal_error("No open frame");
179 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
180 MCSymbol *EHSymbol) {
183 void MCStreamer::InitSections() {
184 SwitchSection(getContext().getObjectFileInfo()->getTextSection());
187 void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
189 Symbol->setSection(*Section);
191 Symbol->setUndefined();
193 // As we emit symbols into a section, track the order so that they can
194 // be sorted upon later. Zero is reserved to mean 'unemitted'.
195 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
198 void MCStreamer::EmitLabel(MCSymbol *Symbol) {
199 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
200 assert(getCurrentSection().first && "Cannot emit before setting section!");
201 AssignSection(Symbol, getCurrentSection().first);
203 MCTargetStreamer *TS = getTargetStreamer();
205 TS->emitLabel(Symbol);
208 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
212 void MCStreamer::EmitCFIStartProc(bool IsSimple) {
213 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
214 if (CurFrame && !CurFrame->End)
215 report_fatal_error("Starting a frame before finishing the previous one!");
217 MCDwarfFrameInfo Frame;
218 Frame.IsSimple = IsSimple;
219 EmitCFIStartProcImpl(Frame);
221 DwarfFrameInfos.push_back(Frame);
224 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
227 void MCStreamer::EmitCFIEndProc() {
228 EnsureValidDwarfFrame();
229 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
230 EmitCFIEndProcImpl(*CurFrame);
233 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
234 // Put a dummy non-null value in Frame.End to mark that this frame has been
236 Frame.End = (MCSymbol *) 1;
239 MCSymbol *MCStreamer::EmitCFICommon() {
240 EnsureValidDwarfFrame();
241 MCSymbol *Label = getContext().CreateTempSymbol();
246 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
247 MCSymbol *Label = EmitCFICommon();
248 MCCFIInstruction Instruction =
249 MCCFIInstruction::createDefCfa(Label, Register, Offset);
250 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
251 CurFrame->Instructions.push_back(Instruction);
254 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
255 MCSymbol *Label = EmitCFICommon();
256 MCCFIInstruction Instruction =
257 MCCFIInstruction::createDefCfaOffset(Label, Offset);
258 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
259 CurFrame->Instructions.push_back(Instruction);
262 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
263 MCSymbol *Label = EmitCFICommon();
264 MCCFIInstruction Instruction =
265 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
266 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
267 CurFrame->Instructions.push_back(Instruction);
270 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
271 MCSymbol *Label = EmitCFICommon();
272 MCCFIInstruction Instruction =
273 MCCFIInstruction::createDefCfaRegister(Label, Register);
274 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
275 CurFrame->Instructions.push_back(Instruction);
278 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
279 MCSymbol *Label = EmitCFICommon();
280 MCCFIInstruction Instruction =
281 MCCFIInstruction::createOffset(Label, Register, Offset);
282 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
283 CurFrame->Instructions.push_back(Instruction);
286 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
287 MCSymbol *Label = EmitCFICommon();
288 MCCFIInstruction Instruction =
289 MCCFIInstruction::createRelOffset(Label, Register, Offset);
290 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
291 CurFrame->Instructions.push_back(Instruction);
294 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
296 EnsureValidDwarfFrame();
297 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
298 CurFrame->Personality = Sym;
299 CurFrame->PersonalityEncoding = Encoding;
302 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
303 EnsureValidDwarfFrame();
304 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
305 CurFrame->Lsda = Sym;
306 CurFrame->LsdaEncoding = Encoding;
309 void MCStreamer::EmitCFIRememberState() {
310 MCSymbol *Label = EmitCFICommon();
311 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
312 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
313 CurFrame->Instructions.push_back(Instruction);
316 void MCStreamer::EmitCFIRestoreState() {
317 // FIXME: Error if there is no matching cfi_remember_state.
318 MCSymbol *Label = EmitCFICommon();
319 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
320 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
321 CurFrame->Instructions.push_back(Instruction);
324 void MCStreamer::EmitCFISameValue(int64_t Register) {
325 MCSymbol *Label = EmitCFICommon();
326 MCCFIInstruction Instruction =
327 MCCFIInstruction::createSameValue(Label, Register);
328 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
329 CurFrame->Instructions.push_back(Instruction);
332 void MCStreamer::EmitCFIRestore(int64_t Register) {
333 MCSymbol *Label = EmitCFICommon();
334 MCCFIInstruction Instruction =
335 MCCFIInstruction::createRestore(Label, Register);
336 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
337 CurFrame->Instructions.push_back(Instruction);
340 void MCStreamer::EmitCFIEscape(StringRef Values) {
341 MCSymbol *Label = EmitCFICommon();
342 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
343 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
344 CurFrame->Instructions.push_back(Instruction);
347 void MCStreamer::EmitCFISignalFrame() {
348 EnsureValidDwarfFrame();
349 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
350 CurFrame->IsSignalFrame = true;
353 void MCStreamer::EmitCFIUndefined(int64_t Register) {
354 MCSymbol *Label = EmitCFICommon();
355 MCCFIInstruction Instruction =
356 MCCFIInstruction::createUndefined(Label, Register);
357 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
358 CurFrame->Instructions.push_back(Instruction);
361 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
362 MCSymbol *Label = EmitCFICommon();
363 MCCFIInstruction Instruction =
364 MCCFIInstruction::createRegister(Label, Register1, Register2);
365 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
366 CurFrame->Instructions.push_back(Instruction);
369 void MCStreamer::EmitCFIWindowSave() {
370 MCSymbol *Label = EmitCFICommon();
371 MCCFIInstruction Instruction =
372 MCCFIInstruction::createWindowSave(Label);
373 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
374 CurFrame->Instructions.push_back(Instruction);
377 void MCStreamer::EnsureValidWinFrameInfo() {
378 if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End)
379 report_fatal_error("No open Win64 EH frame function!");
382 void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
383 if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
384 report_fatal_error("Starting a function before ending the previous one!");
386 MCSymbol *StartProc = getContext().CreateTempSymbol();
387 EmitLabel(StartProc);
389 WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc));
390 CurrentWinFrameInfo = WinFrameInfos.back();
393 void MCStreamer::EmitWinCFIEndProc() {
394 EnsureValidWinFrameInfo();
395 if (CurrentWinFrameInfo->ChainedParent)
396 report_fatal_error("Not all chained regions terminated!");
398 MCSymbol *Label = getContext().CreateTempSymbol();
400 CurrentWinFrameInfo->End = Label;
403 void MCStreamer::EmitWinCFIStartChained() {
404 EnsureValidWinFrameInfo();
406 MCSymbol *StartProc = getContext().CreateTempSymbol();
407 EmitLabel(StartProc);
409 WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function,
410 StartProc, CurrentWinFrameInfo));
411 CurrentWinFrameInfo = WinFrameInfos.back();
414 void MCStreamer::EmitWinCFIEndChained() {
415 EnsureValidWinFrameInfo();
416 if (!CurrentWinFrameInfo->ChainedParent)
417 report_fatal_error("End of a chained region outside a chained region!");
419 MCSymbol *Label = getContext().CreateTempSymbol();
422 CurrentWinFrameInfo->End = Label;
423 CurrentWinFrameInfo =
424 const_cast<WinEH::FrameInfo *>(CurrentWinFrameInfo->ChainedParent);
427 void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
429 EnsureValidWinFrameInfo();
430 if (CurrentWinFrameInfo->ChainedParent)
431 report_fatal_error("Chained unwind areas can't have handlers!");
432 CurrentWinFrameInfo->ExceptionHandler = Sym;
433 if (!Except && !Unwind)
434 report_fatal_error("Don't know what kind of handler this is!");
436 CurrentWinFrameInfo->HandlesUnwind = true;
438 CurrentWinFrameInfo->HandlesExceptions = true;
441 void MCStreamer::EmitWinEHHandlerData() {
442 EnsureValidWinFrameInfo();
443 if (CurrentWinFrameInfo->ChainedParent)
444 report_fatal_error("Chained unwind areas can't have handlers!");
447 void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
448 EnsureValidWinFrameInfo();
450 MCSymbol *Label = getContext().CreateTempSymbol();
453 WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register);
454 CurrentWinFrameInfo->Instructions.push_back(Inst);
457 void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
458 EnsureValidWinFrameInfo();
459 if (CurrentWinFrameInfo->LastFrameInst >= 0)
460 report_fatal_error("Frame register and offset already specified!");
462 report_fatal_error("Misaligned frame pointer offset!");
464 report_fatal_error("Frame offset must be less than or equal to 240!");
466 MCSymbol *Label = getContext().CreateTempSymbol();
469 WinEH::Instruction Inst =
470 Win64EH::Instruction::SetFPReg(Label, Register, Offset);
471 CurrentWinFrameInfo->LastFrameInst = CurrentWinFrameInfo->Instructions.size();
472 CurrentWinFrameInfo->Instructions.push_back(Inst);
475 void MCStreamer::EmitWinCFIAllocStack(unsigned Size) {
476 EnsureValidWinFrameInfo();
478 report_fatal_error("Allocation size must be non-zero!");
480 report_fatal_error("Misaligned stack allocation!");
482 MCSymbol *Label = getContext().CreateTempSymbol();
485 WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
486 CurrentWinFrameInfo->Instructions.push_back(Inst);
489 void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
490 EnsureValidWinFrameInfo();
492 report_fatal_error("Misaligned saved register offset!");
494 MCSymbol *Label = getContext().CreateTempSymbol();
497 WinEH::Instruction Inst =
498 Win64EH::Instruction::SaveNonVol(Label, Register, Offset);
499 CurrentWinFrameInfo->Instructions.push_back(Inst);
502 void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
503 EnsureValidWinFrameInfo();
505 report_fatal_error("Misaligned saved vector register offset!");
507 MCSymbol *Label = getContext().CreateTempSymbol();
510 WinEH::Instruction Inst =
511 Win64EH::Instruction::SaveXMM(Label, Register, Offset);
512 CurrentWinFrameInfo->Instructions.push_back(Inst);
515 void MCStreamer::EmitWinCFIPushFrame(bool Code) {
516 EnsureValidWinFrameInfo();
517 if (CurrentWinFrameInfo->Instructions.size() > 0)
518 report_fatal_error("If present, PushMachFrame must be the first UOP");
520 MCSymbol *Label = getContext().CreateTempSymbol();
523 WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
524 CurrentWinFrameInfo->Instructions.push_back(Inst);
527 void MCStreamer::EmitWinCFIEndProlog() {
528 EnsureValidWinFrameInfo();
530 MCSymbol *Label = getContext().CreateTempSymbol();
533 CurrentWinFrameInfo->PrologEnd = Label;
536 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
539 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
542 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
543 /// the specified string in the output .s file. This capability is
544 /// indicated by the hasRawTextSupport() predicate.
545 void MCStreamer::EmitRawTextImpl(StringRef String) {
546 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
547 " something must not be fully mc'ized\n";
551 void MCStreamer::EmitRawText(const Twine &T) {
552 SmallString<128> Str;
553 EmitRawTextImpl(T.toStringRef(Str));
556 void MCStreamer::EmitWindowsUnwindTables() {
559 void MCStreamer::Finish() {
560 if (!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End)
561 report_fatal_error("Unfinished frame!");
563 MCTargetStreamer *TS = getTargetStreamer();
570 void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
571 visitUsedExpr(*Value);
572 Symbol->setVariableValue(Value);
574 MCTargetStreamer *TS = getTargetStreamer();
576 TS->emitAssignment(Symbol, Value);
579 void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
582 void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
583 switch (Expr.getKind()) {
585 cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
588 case MCExpr::Constant:
591 case MCExpr::Binary: {
592 const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
593 visitUsedExpr(*BE.getLHS());
594 visitUsedExpr(*BE.getRHS());
598 case MCExpr::SymbolRef:
599 visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
603 visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
608 void MCStreamer::EmitInstruction(const MCInst &Inst,
609 const MCSubtargetInfo &STI) {
611 for (unsigned i = Inst.getNumOperands(); i--;)
612 if (Inst.getOperand(i).isExpr())
613 visitUsedExpr(*Inst.getOperand(i).getExpr());
616 void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
617 void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
618 void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
619 void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
620 void MCStreamer::EndCOFFSymbolDef() {}
621 void MCStreamer::EmitFileDirective(StringRef Filename) {}
622 void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
623 void MCStreamer::EmitCOFFSymbolType(int Type) {}
624 void MCStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
625 void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
626 unsigned ByteAlignment) {}
627 void MCStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
628 uint64_t Size, unsigned ByteAlignment) {}
629 void MCStreamer::ChangeSection(const MCSection *, const MCExpr *) {}
630 void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
631 void MCStreamer::EmitBytes(StringRef Data) {}
632 void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
634 visitUsedExpr(*Value);
636 void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
637 void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
638 void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
640 unsigned MaxBytesToEmit) {}
641 void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
642 unsigned MaxBytesToEmit) {}
643 bool MCStreamer::EmitValueToOffset(const MCExpr *Offset, unsigned char Value) {
646 void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
647 void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
648 void MCStreamer::FinishImpl() {}
649 void MCStreamer::EmitBundleUnlock() {}