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/Support/ErrorHandling.h"
21 #include "llvm/Support/LEB128.h"
22 #include "llvm/Support/raw_ostream.h"
26 // Pin the vtables to this file.
27 MCTargetStreamer::~MCTargetStreamer() {}
29 MCTargetStreamer::MCTargetStreamer(MCStreamer &S) : Streamer(S) {
30 S.setTargetStreamer(this);
33 void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
35 MCStreamer::MCStreamer(MCContext &Ctx)
36 : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
37 CurrentW64UnwindInfo(0), LastSymbol(0) {
38 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
41 MCStreamer::~MCStreamer() {
42 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
43 delete W64UnwindInfos[i];
46 void MCStreamer::reset() {
47 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
48 delete W64UnwindInfos[i];
49 W64UnwindInfos.clear();
51 EmitDebugFrame = false;
52 CurrentW64UnwindInfo = 0;
55 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
58 const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
61 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
63 MCSymbolRefExpr::Create(A, Variant, Context);
65 MCSymbolRefExpr::Create(B, Variant, Context);
66 const MCExpr *AddrDelta =
67 MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
71 const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
72 if (Context.getAsmInfo()->hasAggressiveSymbolFolding() ||
73 isa<MCSymbolRefExpr>(Expr))
76 MCSymbol *ABS = Context.CreateTempSymbol();
77 EmitAssignment(ABS, Expr);
78 return MCSymbolRefExpr::Create(ABS, Context);
81 raw_ostream &MCStreamer::GetCommentOS() {
82 // By default, discard comments.
86 void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
88 void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
89 for (std::vector<MCDwarfFrameInfo>::iterator I = FrameInfos.begin(),
90 E = FrameInfos.end(); I != E; ++I)
91 I->CompactUnwindEncoding =
92 (MAB ? MAB->generateCompactUnwindEncoding(I->Instructions) : 0);
95 void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
96 const MCSymbol *Label, int PointerSize) {
97 // emit the sequence to set the address
98 EmitIntValue(dwarf::DW_LNS_extended_op, 1);
99 EmitULEB128IntValue(PointerSize + 1);
100 EmitIntValue(dwarf::DW_LNE_set_address, 1);
101 EmitSymbolValue(Label, PointerSize);
103 // emit the sequence for the LineDelta (from 1) and a zero address delta.
104 MCDwarfLineAddr::Emit(this, LineDelta, 0);
107 /// EmitIntValue - Special case of EmitValue that avoids the client having to
108 /// pass in a MCExpr for constant integers.
109 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
110 assert(Size <= 8 && "Invalid size");
111 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
114 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
115 for (unsigned i = 0; i != Size; ++i) {
116 unsigned index = isLittleEndian ? i : (Size - i - 1);
117 buf[i] = uint8_t(Value >> (index * 8));
119 EmitBytes(StringRef(buf, Size));
122 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
123 /// client having to pass in a MCExpr for constant integers.
124 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
125 SmallString<128> Tmp;
126 raw_svector_ostream OSE(Tmp);
127 encodeULEB128(Value, OSE, Padding);
128 EmitBytes(OSE.str());
131 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
132 /// client having to pass in a MCExpr for constant integers.
133 void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
134 SmallString<128> Tmp;
135 raw_svector_ostream OSE(Tmp);
136 encodeSLEB128(Value, OSE);
137 EmitBytes(OSE.str());
140 void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) {
141 const MCExpr *ABS = ForceExpAbs(Value);
142 EmitValue(ABS, Size);
146 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
147 EmitValueImpl(Value, Size);
150 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
151 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
154 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
155 report_fatal_error("unsupported directive in streamer");
158 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
159 report_fatal_error("unsupported directive in streamer");
162 /// EmitFill - Emit NumBytes bytes worth of the value specified by
163 /// FillValue. This implements directives such as '.space'.
164 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
165 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
166 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
170 /// The implementation in this class just redirects to EmitFill.
171 void MCStreamer::EmitZeros(uint64_t NumBytes) {
172 EmitFill(NumBytes, 0);
175 bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
177 StringRef Filename, unsigned CUID) {
178 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID) == 0;
181 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
182 unsigned Column, unsigned Flags,
184 unsigned Discriminator,
185 StringRef FileName) {
186 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
190 MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
191 if (FrameInfos.empty())
193 return &FrameInfos.back();
196 void MCStreamer::EnsureValidFrame() {
197 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
198 if (!CurFrame || CurFrame->End)
199 report_fatal_error("No open frame");
202 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
203 MCSymbol *EHSymbol) {
206 void MCStreamer::InitSections(bool Force) {
207 SwitchSection(getContext().getObjectFileInfo()->getTextSection());
210 void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
212 Symbol->setSection(*Section);
214 Symbol->setUndefined();
216 // As we emit symbols into a section, track the order so that they can
217 // be sorted upon later. Zero is reserved to mean 'unemitted'.
218 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
221 void MCStreamer::EmitLabel(MCSymbol *Symbol) {
222 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
223 assert(getCurrentSection().first && "Cannot emit before setting section!");
224 AssignSection(Symbol, getCurrentSection().first);
227 MCTargetStreamer *TS = getTargetStreamer();
229 TS->emitLabel(Symbol);
232 void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
233 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
234 assert(getCurrentSection().first && "Cannot emit before setting section!");
235 AssignSection(Symbol, getCurrentSection().first);
239 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
241 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
242 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
245 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
248 EmitDebugFrame = Debug;
251 void MCStreamer::EmitCFIStartProc() {
252 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
253 if (CurFrame && !CurFrame->End)
254 report_fatal_error("Starting a frame before finishing the previous one!");
256 MCDwarfFrameInfo Frame;
257 EmitCFIStartProcImpl(Frame);
259 FrameInfos.push_back(Frame);
262 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
265 void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
266 Frame.Function = LastSymbol;
267 // If the function is externally visible, we need to create a local
268 // symbol to avoid relocations.
269 StringRef Prefix = getContext().getAsmInfo()->getPrivateGlobalPrefix();
270 if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
271 Frame.Begin = LastSymbol;
273 Frame.Begin = getContext().CreateTempSymbol();
274 EmitLabel(Frame.Begin);
278 void MCStreamer::EmitCFIEndProc() {
280 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
281 EmitCFIEndProcImpl(*CurFrame);
284 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
287 void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
288 Frame.End = getContext().CreateTempSymbol();
289 EmitLabel(Frame.End);
292 MCSymbol *MCStreamer::EmitCFICommon() {
294 MCSymbol *Label = getContext().CreateTempSymbol();
299 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
300 MCSymbol *Label = EmitCFICommon();
301 MCCFIInstruction Instruction =
302 MCCFIInstruction::createDefCfa(Label, Register, Offset);
303 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
304 CurFrame->Instructions.push_back(Instruction);
307 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
308 MCSymbol *Label = EmitCFICommon();
309 MCCFIInstruction Instruction =
310 MCCFIInstruction::createDefCfaOffset(Label, Offset);
311 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
312 CurFrame->Instructions.push_back(Instruction);
315 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
316 MCSymbol *Label = EmitCFICommon();
317 MCCFIInstruction Instruction =
318 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
319 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
320 CurFrame->Instructions.push_back(Instruction);
323 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
324 MCSymbol *Label = EmitCFICommon();
325 MCCFIInstruction Instruction =
326 MCCFIInstruction::createDefCfaRegister(Label, Register);
327 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
328 CurFrame->Instructions.push_back(Instruction);
331 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
332 MCSymbol *Label = EmitCFICommon();
333 MCCFIInstruction Instruction =
334 MCCFIInstruction::createOffset(Label, Register, Offset);
335 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
336 CurFrame->Instructions.push_back(Instruction);
339 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
340 MCSymbol *Label = EmitCFICommon();
341 MCCFIInstruction Instruction =
342 MCCFIInstruction::createRelOffset(Label, Register, Offset);
343 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
344 CurFrame->Instructions.push_back(Instruction);
347 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
350 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
351 CurFrame->Personality = Sym;
352 CurFrame->PersonalityEncoding = Encoding;
355 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
357 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
358 CurFrame->Lsda = Sym;
359 CurFrame->LsdaEncoding = Encoding;
362 void MCStreamer::EmitCFIRememberState() {
363 MCSymbol *Label = EmitCFICommon();
364 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
365 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
366 CurFrame->Instructions.push_back(Instruction);
369 void MCStreamer::EmitCFIRestoreState() {
370 // FIXME: Error if there is no matching cfi_remember_state.
371 MCSymbol *Label = EmitCFICommon();
372 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
373 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
374 CurFrame->Instructions.push_back(Instruction);
377 void MCStreamer::EmitCFISameValue(int64_t Register) {
378 MCSymbol *Label = EmitCFICommon();
379 MCCFIInstruction Instruction =
380 MCCFIInstruction::createSameValue(Label, Register);
381 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
382 CurFrame->Instructions.push_back(Instruction);
385 void MCStreamer::EmitCFIRestore(int64_t Register) {
386 MCSymbol *Label = EmitCFICommon();
387 MCCFIInstruction Instruction =
388 MCCFIInstruction::createRestore(Label, Register);
389 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
390 CurFrame->Instructions.push_back(Instruction);
393 void MCStreamer::EmitCFIEscape(StringRef Values) {
394 MCSymbol *Label = EmitCFICommon();
395 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
396 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
397 CurFrame->Instructions.push_back(Instruction);
400 void MCStreamer::EmitCFISignalFrame() {
402 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
403 CurFrame->IsSignalFrame = true;
406 void MCStreamer::EmitCFIUndefined(int64_t Register) {
407 MCSymbol *Label = EmitCFICommon();
408 MCCFIInstruction Instruction =
409 MCCFIInstruction::createUndefined(Label, Register);
410 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
411 CurFrame->Instructions.push_back(Instruction);
414 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
415 MCSymbol *Label = EmitCFICommon();
416 MCCFIInstruction Instruction =
417 MCCFIInstruction::createRegister(Label, Register1, Register2);
418 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
419 CurFrame->Instructions.push_back(Instruction);
422 void MCStreamer::EmitCFIWindowSave() {
423 MCSymbol *Label = EmitCFICommon();
424 MCCFIInstruction Instruction =
425 MCCFIInstruction::createWindowSave(Label);
426 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
427 CurFrame->Instructions.push_back(Instruction);
430 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
431 W64UnwindInfos.push_back(Frame);
432 CurrentW64UnwindInfo = W64UnwindInfos.back();
435 void MCStreamer::EnsureValidW64UnwindInfo() {
436 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
437 if (!CurFrame || CurFrame->End)
438 report_fatal_error("No open Win64 EH frame function!");
441 void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
442 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
443 if (CurFrame && !CurFrame->End)
444 report_fatal_error("Starting a function before ending the previous one!");
445 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
446 Frame->Begin = getContext().CreateTempSymbol();
447 Frame->Function = Symbol;
448 EmitLabel(Frame->Begin);
449 setCurrentW64UnwindInfo(Frame);
452 void MCStreamer::EmitWin64EHEndProc() {
453 EnsureValidW64UnwindInfo();
454 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
455 if (CurFrame->ChainedParent)
456 report_fatal_error("Not all chained regions terminated!");
457 CurFrame->End = getContext().CreateTempSymbol();
458 EmitLabel(CurFrame->End);
461 void MCStreamer::EmitWin64EHStartChained() {
462 EnsureValidW64UnwindInfo();
463 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
464 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
465 Frame->Begin = getContext().CreateTempSymbol();
466 Frame->Function = CurFrame->Function;
467 Frame->ChainedParent = CurFrame;
468 EmitLabel(Frame->Begin);
469 setCurrentW64UnwindInfo(Frame);
472 void MCStreamer::EmitWin64EHEndChained() {
473 EnsureValidW64UnwindInfo();
474 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
475 if (!CurFrame->ChainedParent)
476 report_fatal_error("End of a chained region outside a chained region!");
477 CurFrame->End = getContext().CreateTempSymbol();
478 EmitLabel(CurFrame->End);
479 CurrentW64UnwindInfo = CurFrame->ChainedParent;
482 void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
484 EnsureValidW64UnwindInfo();
485 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
486 if (CurFrame->ChainedParent)
487 report_fatal_error("Chained unwind areas can't have handlers!");
488 CurFrame->ExceptionHandler = Sym;
489 if (!Except && !Unwind)
490 report_fatal_error("Don't know what kind of handler this is!");
492 CurFrame->HandlesUnwind = true;
494 CurFrame->HandlesExceptions = true;
497 void MCStreamer::EmitWin64EHHandlerData() {
498 EnsureValidW64UnwindInfo();
499 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
500 if (CurFrame->ChainedParent)
501 report_fatal_error("Chained unwind areas can't have handlers!");
504 void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
505 EnsureValidW64UnwindInfo();
506 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
507 MCSymbol *Label = getContext().CreateTempSymbol();
508 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
510 CurFrame->Instructions.push_back(Inst);
513 void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
514 EnsureValidW64UnwindInfo();
515 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
516 if (CurFrame->LastFrameInst >= 0)
517 report_fatal_error("Frame register and offset already specified!");
519 report_fatal_error("Misaligned frame pointer offset!");
520 MCSymbol *Label = getContext().CreateTempSymbol();
521 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
523 CurFrame->LastFrameInst = CurFrame->Instructions.size();
524 CurFrame->Instructions.push_back(Inst);
527 void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
528 EnsureValidW64UnwindInfo();
530 report_fatal_error("Misaligned stack allocation!");
531 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
532 MCSymbol *Label = getContext().CreateTempSymbol();
533 MCWin64EHInstruction Inst(Label, Size);
535 CurFrame->Instructions.push_back(Inst);
538 void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
539 EnsureValidW64UnwindInfo();
541 report_fatal_error("Misaligned saved register offset!");
542 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
543 MCSymbol *Label = getContext().CreateTempSymbol();
544 MCWin64EHInstruction Inst(
545 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
546 Label, Register, Offset);
548 CurFrame->Instructions.push_back(Inst);
551 void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
552 EnsureValidW64UnwindInfo();
554 report_fatal_error("Misaligned saved vector register offset!");
555 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
556 MCSymbol *Label = getContext().CreateTempSymbol();
557 MCWin64EHInstruction Inst(
558 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
559 Label, Register, Offset);
561 CurFrame->Instructions.push_back(Inst);
564 void MCStreamer::EmitWin64EHPushFrame(bool Code) {
565 EnsureValidW64UnwindInfo();
566 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
567 if (CurFrame->Instructions.size() > 0)
568 report_fatal_error("If present, PushMachFrame must be the first UOP");
569 MCSymbol *Label = getContext().CreateTempSymbol();
570 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
572 CurFrame->Instructions.push_back(Inst);
575 void MCStreamer::EmitWin64EHEndProlog() {
576 EnsureValidW64UnwindInfo();
577 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
578 CurFrame->PrologEnd = getContext().CreateTempSymbol();
579 EmitLabel(CurFrame->PrologEnd);
582 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
583 llvm_unreachable("This file format doesn't support this directive");
586 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
587 llvm_unreachable("This file format doesn't support this directive");
590 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
591 /// the specified string in the output .s file. This capability is
592 /// indicated by the hasRawTextSupport() predicate.
593 void MCStreamer::EmitRawTextImpl(StringRef String) {
594 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
595 " something must not be fully mc'ized\n";
599 void MCStreamer::EmitRawText(const Twine &T) {
600 SmallString<128> Str;
601 EmitRawTextImpl(T.toStringRef(Str));
604 void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
605 if (!getNumFrameInfos())
609 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
612 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
615 void MCStreamer::EmitW64Tables() {
616 if (!getNumW64UnwindInfos())
619 MCWin64EHUnwindEmitter::Emit(*this);
622 void MCStreamer::Finish() {
623 if (!FrameInfos.empty() && !FrameInfos.back().End)
624 report_fatal_error("Unfinished frame!");
629 MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
630 report_fatal_error("Not supported!");
631 return *(static_cast<MCSymbolData*>(0));