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;
57 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
60 raw_ostream &MCStreamer::GetCommentOS() {
61 // By default, discard comments.
65 void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
67 void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
68 for (auto &FI : DwarfFrameInfos)
69 FI.CompactUnwindEncoding =
70 (MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0);
73 /// EmitIntValue - Special case of EmitValue that avoids the client having to
74 /// pass in a MCExpr for constant integers.
75 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
76 assert(1 <= Size && Size <= 8 && "Invalid size");
77 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
80 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
81 for (unsigned i = 0; i != Size; ++i) {
82 unsigned index = isLittleEndian ? i : (Size - i - 1);
83 buf[i] = uint8_t(Value >> (index * 8));
85 EmitBytes(StringRef(buf, Size));
88 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
89 /// client having to pass in a MCExpr for constant integers.
90 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
92 raw_svector_ostream OSE(Tmp);
93 encodeULEB128(Value, OSE, Padding);
97 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
98 /// client having to pass in a MCExpr for constant integers.
99 void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
100 SmallString<128> Tmp;
101 raw_svector_ostream OSE(Tmp);
102 encodeSLEB128(Value, OSE);
103 EmitBytes(OSE.str());
106 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
108 EmitValueImpl(Value, Size, Loc);
111 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
112 bool IsSectionRelative) {
113 assert((!IsSectionRelative || Size == 4) &&
114 "SectionRelative value requires 4-bytes");
116 if (!IsSectionRelative)
117 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
119 EmitCOFFSecRel32(Sym);
122 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
123 report_fatal_error("unsupported directive in streamer");
126 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
127 report_fatal_error("unsupported directive in streamer");
130 /// EmitFill - Emit NumBytes bytes worth of the value specified by
131 /// FillValue. This implements directives such as '.space'.
132 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
133 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
134 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
138 /// The implementation in this class just redirects to EmitFill.
139 void MCStreamer::EmitZeros(uint64_t NumBytes) {
140 EmitFill(NumBytes, 0);
143 unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
145 StringRef Filename, unsigned CUID) {
146 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID);
149 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
150 unsigned Column, unsigned Flags,
152 unsigned Discriminator,
153 StringRef FileName) {
154 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
158 MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
159 MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
160 if (!Table.getLabel()) {
161 StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
163 Context.GetOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
165 return Table.getLabel();
168 MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
169 if (DwarfFrameInfos.empty())
171 return &DwarfFrameInfos.back();
174 void MCStreamer::EnsureValidDwarfFrame() {
175 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
176 if (!CurFrame || CurFrame->End)
177 report_fatal_error("No open frame");
180 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
181 MCSymbol *EHSymbol) {
184 void MCStreamer::InitSections() {
185 SwitchSection(getContext().getObjectFileInfo()->getTextSection());
188 void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
190 Symbol->setSection(*Section);
192 Symbol->setUndefined();
194 // As we emit symbols into a section, track the order so that they can
195 // be sorted upon later. Zero is reserved to mean 'unemitted'.
196 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
199 void MCStreamer::EmitLabel(MCSymbol *Symbol) {
200 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
201 assert(getCurrentSection().first && "Cannot emit before setting section!");
202 AssignSection(Symbol, getCurrentSection().first);
204 MCTargetStreamer *TS = getTargetStreamer();
206 TS->emitLabel(Symbol);
209 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
213 void MCStreamer::EmitCFIStartProc(bool IsSimple) {
214 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
215 if (CurFrame && !CurFrame->End)
216 report_fatal_error("Starting a frame before finishing the previous one!");
218 MCDwarfFrameInfo Frame;
219 Frame.IsSimple = IsSimple;
220 EmitCFIStartProcImpl(Frame);
222 DwarfFrameInfos.push_back(Frame);
225 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
228 void MCStreamer::EmitCFIEndProc() {
229 EnsureValidDwarfFrame();
230 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
231 EmitCFIEndProcImpl(*CurFrame);
234 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
235 // Put a dummy non-null value in Frame.End to mark that this frame has been
237 Frame.End = (MCSymbol *) 1;
240 MCSymbol *MCStreamer::EmitCFICommon() {
241 EnsureValidDwarfFrame();
242 MCSymbol *Label = getContext().CreateTempSymbol();
247 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
248 MCSymbol *Label = EmitCFICommon();
249 MCCFIInstruction Instruction =
250 MCCFIInstruction::createDefCfa(Label, Register, Offset);
251 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
252 CurFrame->Instructions.push_back(Instruction);
255 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
256 MCSymbol *Label = EmitCFICommon();
257 MCCFIInstruction Instruction =
258 MCCFIInstruction::createDefCfaOffset(Label, Offset);
259 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
260 CurFrame->Instructions.push_back(Instruction);
263 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
264 MCSymbol *Label = EmitCFICommon();
265 MCCFIInstruction Instruction =
266 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
267 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
268 CurFrame->Instructions.push_back(Instruction);
271 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
272 MCSymbol *Label = EmitCFICommon();
273 MCCFIInstruction Instruction =
274 MCCFIInstruction::createDefCfaRegister(Label, Register);
275 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
276 CurFrame->Instructions.push_back(Instruction);
279 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
280 MCSymbol *Label = EmitCFICommon();
281 MCCFIInstruction Instruction =
282 MCCFIInstruction::createOffset(Label, Register, Offset);
283 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
284 CurFrame->Instructions.push_back(Instruction);
287 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
288 MCSymbol *Label = EmitCFICommon();
289 MCCFIInstruction Instruction =
290 MCCFIInstruction::createRelOffset(Label, Register, Offset);
291 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
292 CurFrame->Instructions.push_back(Instruction);
295 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
297 EnsureValidDwarfFrame();
298 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
299 CurFrame->Personality = Sym;
300 CurFrame->PersonalityEncoding = Encoding;
303 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
304 EnsureValidDwarfFrame();
305 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
306 CurFrame->Lsda = Sym;
307 CurFrame->LsdaEncoding = Encoding;
310 void MCStreamer::EmitCFIRememberState() {
311 MCSymbol *Label = EmitCFICommon();
312 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
313 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
314 CurFrame->Instructions.push_back(Instruction);
317 void MCStreamer::EmitCFIRestoreState() {
318 // FIXME: Error if there is no matching cfi_remember_state.
319 MCSymbol *Label = EmitCFICommon();
320 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
321 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
322 CurFrame->Instructions.push_back(Instruction);
325 void MCStreamer::EmitCFISameValue(int64_t Register) {
326 MCSymbol *Label = EmitCFICommon();
327 MCCFIInstruction Instruction =
328 MCCFIInstruction::createSameValue(Label, Register);
329 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
330 CurFrame->Instructions.push_back(Instruction);
333 void MCStreamer::EmitCFIRestore(int64_t Register) {
334 MCSymbol *Label = EmitCFICommon();
335 MCCFIInstruction Instruction =
336 MCCFIInstruction::createRestore(Label, Register);
337 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
338 CurFrame->Instructions.push_back(Instruction);
341 void MCStreamer::EmitCFIEscape(StringRef Values) {
342 MCSymbol *Label = EmitCFICommon();
343 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
344 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
345 CurFrame->Instructions.push_back(Instruction);
348 void MCStreamer::EmitCFISignalFrame() {
349 EnsureValidDwarfFrame();
350 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
351 CurFrame->IsSignalFrame = true;
354 void MCStreamer::EmitCFIUndefined(int64_t Register) {
355 MCSymbol *Label = EmitCFICommon();
356 MCCFIInstruction Instruction =
357 MCCFIInstruction::createUndefined(Label, Register);
358 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
359 CurFrame->Instructions.push_back(Instruction);
362 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
363 MCSymbol *Label = EmitCFICommon();
364 MCCFIInstruction Instruction =
365 MCCFIInstruction::createRegister(Label, Register1, Register2);
366 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
367 CurFrame->Instructions.push_back(Instruction);
370 void MCStreamer::EmitCFIWindowSave() {
371 MCSymbol *Label = EmitCFICommon();
372 MCCFIInstruction Instruction =
373 MCCFIInstruction::createWindowSave(Label);
374 MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
375 CurFrame->Instructions.push_back(Instruction);
378 void MCStreamer::EnsureValidWinFrameInfo() {
379 if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End)
380 report_fatal_error("No open Win64 EH frame function!");
383 void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
384 if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
385 report_fatal_error("Starting a function before ending the previous one!");
387 MCSymbol *StartProc = getContext().CreateTempSymbol();
388 EmitLabel(StartProc);
390 WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc));
391 CurrentWinFrameInfo = WinFrameInfos.back();
394 void MCStreamer::EmitWinCFIEndProc() {
395 EnsureValidWinFrameInfo();
396 if (CurrentWinFrameInfo->ChainedParent)
397 report_fatal_error("Not all chained regions terminated!");
399 MCSymbol *Label = getContext().CreateTempSymbol();
401 CurrentWinFrameInfo->End = Label;
404 void MCStreamer::EmitWinCFIStartChained() {
405 EnsureValidWinFrameInfo();
407 MCSymbol *StartProc = getContext().CreateTempSymbol();
408 EmitLabel(StartProc);
410 WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function,
411 StartProc, CurrentWinFrameInfo));
412 CurrentWinFrameInfo = WinFrameInfos.back();
415 void MCStreamer::EmitWinCFIEndChained() {
416 EnsureValidWinFrameInfo();
417 if (!CurrentWinFrameInfo->ChainedParent)
418 report_fatal_error("End of a chained region outside a chained region!");
420 MCSymbol *Label = getContext().CreateTempSymbol();
423 CurrentWinFrameInfo->End = Label;
424 CurrentWinFrameInfo =
425 const_cast<WinEH::FrameInfo *>(CurrentWinFrameInfo->ChainedParent);
428 void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
430 EnsureValidWinFrameInfo();
431 if (CurrentWinFrameInfo->ChainedParent)
432 report_fatal_error("Chained unwind areas can't have handlers!");
433 CurrentWinFrameInfo->ExceptionHandler = Sym;
434 if (!Except && !Unwind)
435 report_fatal_error("Don't know what kind of handler this is!");
437 CurrentWinFrameInfo->HandlesUnwind = true;
439 CurrentWinFrameInfo->HandlesExceptions = true;
442 void MCStreamer::EmitWinEHHandlerData() {
443 EnsureValidWinFrameInfo();
444 if (CurrentWinFrameInfo->ChainedParent)
445 report_fatal_error("Chained unwind areas can't have handlers!");
448 void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
449 EnsureValidWinFrameInfo();
451 MCSymbol *Label = getContext().CreateTempSymbol();
454 WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register);
455 CurrentWinFrameInfo->Instructions.push_back(Inst);
458 void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
459 EnsureValidWinFrameInfo();
460 if (CurrentWinFrameInfo->LastFrameInst >= 0)
461 report_fatal_error("Frame register and offset already specified!");
463 report_fatal_error("Misaligned frame pointer offset!");
465 report_fatal_error("Frame offset must be less than or equal to 240!");
467 MCSymbol *Label = getContext().CreateTempSymbol();
470 WinEH::Instruction Inst =
471 Win64EH::Instruction::SetFPReg(Label, Register, Offset);
472 CurrentWinFrameInfo->LastFrameInst = CurrentWinFrameInfo->Instructions.size();
473 CurrentWinFrameInfo->Instructions.push_back(Inst);
476 void MCStreamer::EmitWinCFIAllocStack(unsigned Size) {
477 EnsureValidWinFrameInfo();
479 report_fatal_error("Allocation size must be non-zero!");
481 report_fatal_error("Misaligned stack allocation!");
483 MCSymbol *Label = getContext().CreateTempSymbol();
486 WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
487 CurrentWinFrameInfo->Instructions.push_back(Inst);
490 void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
491 EnsureValidWinFrameInfo();
493 report_fatal_error("Misaligned saved register offset!");
495 MCSymbol *Label = getContext().CreateTempSymbol();
498 WinEH::Instruction Inst =
499 Win64EH::Instruction::SaveNonVol(Label, Register, Offset);
500 CurrentWinFrameInfo->Instructions.push_back(Inst);
503 void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
504 EnsureValidWinFrameInfo();
506 report_fatal_error("Misaligned saved vector register offset!");
508 MCSymbol *Label = getContext().CreateTempSymbol();
511 WinEH::Instruction Inst =
512 Win64EH::Instruction::SaveXMM(Label, Register, Offset);
513 CurrentWinFrameInfo->Instructions.push_back(Inst);
516 void MCStreamer::EmitWinCFIPushFrame(bool Code) {
517 EnsureValidWinFrameInfo();
518 if (CurrentWinFrameInfo->Instructions.size() > 0)
519 report_fatal_error("If present, PushMachFrame must be the first UOP");
521 MCSymbol *Label = getContext().CreateTempSymbol();
524 WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
525 CurrentWinFrameInfo->Instructions.push_back(Inst);
528 void MCStreamer::EmitWinCFIEndProlog() {
529 EnsureValidWinFrameInfo();
531 MCSymbol *Label = getContext().CreateTempSymbol();
534 CurrentWinFrameInfo->PrologEnd = Label;
537 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
540 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
543 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
544 /// the specified string in the output .s file. This capability is
545 /// indicated by the hasRawTextSupport() predicate.
546 void MCStreamer::EmitRawTextImpl(StringRef String) {
547 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
548 " something must not be fully mc'ized\n";
552 void MCStreamer::EmitRawText(const Twine &T) {
553 SmallString<128> Str;
554 EmitRawTextImpl(T.toStringRef(Str));
557 void MCStreamer::EmitWindowsUnwindTables() {
560 void MCStreamer::Finish() {
561 if (!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End)
562 report_fatal_error("Unfinished frame!");
564 MCTargetStreamer *TS = getTargetStreamer();
571 void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
572 visitUsedExpr(*Value);
573 Symbol->setVariableValue(Value);
575 MCTargetStreamer *TS = getTargetStreamer();
577 TS->emitAssignment(Symbol, Value);
580 void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
583 void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
584 switch (Expr.getKind()) {
586 cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
589 case MCExpr::Constant:
592 case MCExpr::Binary: {
593 const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
594 visitUsedExpr(*BE.getLHS());
595 visitUsedExpr(*BE.getRHS());
599 case MCExpr::SymbolRef:
600 visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
604 visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
609 void MCStreamer::EmitInstruction(const MCInst &Inst,
610 const MCSubtargetInfo &STI) {
612 for (unsigned i = Inst.getNumOperands(); i--;)
613 if (Inst.getOperand(i).isExpr())
614 visitUsedExpr(*Inst.getOperand(i).getExpr());
617 void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
618 void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
619 void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
620 void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
621 void MCStreamer::EndCOFFSymbolDef() {}
622 void MCStreamer::EmitFileDirective(StringRef Filename) {}
623 void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
624 void MCStreamer::EmitCOFFSymbolType(int Type) {}
625 void MCStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
626 void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
627 unsigned ByteAlignment) {}
628 void MCStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
629 uint64_t Size, unsigned ByteAlignment) {}
630 void MCStreamer::ChangeSection(const MCSection *, const MCExpr *) {}
631 void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
632 void MCStreamer::EmitBytes(StringRef Data) {}
633 void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
635 visitUsedExpr(*Value);
637 void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
638 void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
639 void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
641 unsigned MaxBytesToEmit) {}
642 void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
643 unsigned MaxBytesToEmit) {}
644 bool MCStreamer::EmitValueToOffset(const MCExpr *Offset, unsigned char Value) {
647 void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
648 void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
649 void MCStreamer::FinishImpl() {}
650 void MCStreamer::EmitBundleUnlock() {}