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() {}
28 void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
30 MCStreamer::MCStreamer(MCContext &Ctx, MCTargetStreamer *TargetStreamer)
31 : Context(Ctx), TargetStreamer(TargetStreamer), EmitEHFrame(true),
32 EmitDebugFrame(false), CurrentW64UnwindInfo(0), LastSymbol(0),
33 AutoInitSections(false) {
34 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
36 TargetStreamer->setStreamer(this);
39 MCStreamer::~MCStreamer() {
40 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
41 delete W64UnwindInfos[i];
44 void MCStreamer::reset() {
45 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
46 delete W64UnwindInfos[i];
47 W64UnwindInfos.clear();
49 EmitDebugFrame = false;
50 CurrentW64UnwindInfo = 0;
53 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
56 const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
59 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
61 MCSymbolRefExpr::Create(A, Variant, Context);
63 MCSymbolRefExpr::Create(B, Variant, Context);
64 const MCExpr *AddrDelta =
65 MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
69 const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
70 if (Context.getAsmInfo()->hasAggressiveSymbolFolding() ||
71 isa<MCSymbolRefExpr>(Expr))
74 MCSymbol *ABS = Context.CreateTempSymbol();
75 EmitAssignment(ABS, Expr);
76 return MCSymbolRefExpr::Create(ABS, Context);
79 raw_ostream &MCStreamer::GetCommentOS() {
80 // By default, discard comments.
84 void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
86 void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
87 for (std::vector<MCDwarfFrameInfo>::iterator I = FrameInfos.begin(),
88 E = FrameInfos.end(); I != E; ++I)
89 I->CompactUnwindEncoding =
90 (MAB ? MAB->generateCompactUnwindEncoding(I->Instructions) : 0);
93 void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
94 const MCSymbol *Label, int PointerSize) {
95 // emit the sequence to set the address
96 EmitIntValue(dwarf::DW_LNS_extended_op, 1);
97 EmitULEB128IntValue(PointerSize + 1);
98 EmitIntValue(dwarf::DW_LNE_set_address, 1);
99 EmitSymbolValue(Label, PointerSize);
101 // emit the sequence for the LineDelta (from 1) and a zero address delta.
102 MCDwarfLineAddr::Emit(this, LineDelta, 0);
105 /// EmitIntValue - Special case of EmitValue that avoids the client having to
106 /// pass in a MCExpr for constant integers.
107 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
108 assert(Size <= 8 && "Invalid size");
109 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
112 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
113 for (unsigned i = 0; i != Size; ++i) {
114 unsigned index = isLittleEndian ? i : (Size - i - 1);
115 buf[i] = uint8_t(Value >> (index * 8));
117 EmitBytes(StringRef(buf, Size));
120 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
121 /// client having to pass in a MCExpr for constant integers.
122 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
123 SmallString<128> Tmp;
124 raw_svector_ostream OSE(Tmp);
125 encodeULEB128(Value, OSE, Padding);
126 EmitBytes(OSE.str());
129 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
130 /// client having to pass in a MCExpr for constant integers.
131 void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
132 SmallString<128> Tmp;
133 raw_svector_ostream OSE(Tmp);
134 encodeSLEB128(Value, OSE);
135 EmitBytes(OSE.str());
138 void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) {
139 const MCExpr *ABS = ForceExpAbs(Value);
140 EmitValue(ABS, Size);
144 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
145 EmitValueImpl(Value, Size);
148 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
149 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
152 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
153 report_fatal_error("unsupported directive in streamer");
156 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
157 report_fatal_error("unsupported directive in streamer");
160 /// EmitFill - Emit NumBytes bytes worth of the value specified by
161 /// FillValue. This implements directives such as '.space'.
162 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
163 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
164 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
168 /// The implementation in this class just redirects to EmitFill.
169 void MCStreamer::EmitZeros(uint64_t NumBytes) {
170 EmitFill(NumBytes, 0);
173 bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
175 StringRef Filename, unsigned CUID) {
176 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID) == 0;
179 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
180 unsigned Column, unsigned Flags,
182 unsigned Discriminator,
183 StringRef FileName) {
184 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
188 MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
189 if (FrameInfos.empty())
191 return &FrameInfos.back();
194 void MCStreamer::EnsureValidFrame() {
195 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
196 if (!CurFrame || CurFrame->End)
197 report_fatal_error("No open frame");
200 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
201 MCSymbol *EHSymbol) {
204 void MCStreamer::InitSections() {
205 SwitchSection(getContext().getObjectFileInfo()->getTextSection());
208 void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
210 Symbol->setSection(*Section);
212 Symbol->setUndefined();
214 // As we emit symbols into a section, track the order so that they can
215 // be sorted upon later. Zero is reserved to mean 'unemitted'.
216 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
219 void MCStreamer::EmitLabel(MCSymbol *Symbol) {
220 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
221 assert(getCurrentSection().first && "Cannot emit before setting section!");
222 AssignSection(Symbol, getCurrentSection().first);
225 MCTargetStreamer *TS = getTargetStreamer();
227 TS->emitLabel(Symbol);
230 void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
231 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
232 assert(getCurrentSection().first && "Cannot emit before setting section!");
233 AssignSection(Symbol, getCurrentSection().first);
237 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
239 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
240 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
243 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
246 EmitDebugFrame = Debug;
249 void MCStreamer::EmitCFIStartProc() {
250 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
251 if (CurFrame && !CurFrame->End)
252 report_fatal_error("Starting a frame before finishing the previous one!");
254 MCDwarfFrameInfo Frame;
255 EmitCFIStartProcImpl(Frame);
257 FrameInfos.push_back(Frame);
260 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
263 void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
264 Frame.Function = LastSymbol;
265 // If the function is externally visible, we need to create a local
266 // symbol to avoid relocations.
267 StringRef Prefix = getContext().getAsmInfo()->getPrivateGlobalPrefix();
268 if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
269 Frame.Begin = LastSymbol;
271 Frame.Begin = getContext().CreateTempSymbol();
272 EmitLabel(Frame.Begin);
276 void MCStreamer::EmitCFIEndProc() {
278 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
279 EmitCFIEndProcImpl(*CurFrame);
282 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
285 void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
286 Frame.End = getContext().CreateTempSymbol();
287 EmitLabel(Frame.End);
290 MCSymbol *MCStreamer::EmitCFICommon() {
292 MCSymbol *Label = getContext().CreateTempSymbol();
297 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
298 MCSymbol *Label = EmitCFICommon();
299 MCCFIInstruction Instruction =
300 MCCFIInstruction::createDefCfa(Label, Register, Offset);
301 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
302 CurFrame->Instructions.push_back(Instruction);
305 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
306 MCSymbol *Label = EmitCFICommon();
307 MCCFIInstruction Instruction =
308 MCCFIInstruction::createDefCfaOffset(Label, Offset);
309 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
310 CurFrame->Instructions.push_back(Instruction);
313 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
314 MCSymbol *Label = EmitCFICommon();
315 MCCFIInstruction Instruction =
316 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
317 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
318 CurFrame->Instructions.push_back(Instruction);
321 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
322 MCSymbol *Label = EmitCFICommon();
323 MCCFIInstruction Instruction =
324 MCCFIInstruction::createDefCfaRegister(Label, Register);
325 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
326 CurFrame->Instructions.push_back(Instruction);
329 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
330 MCSymbol *Label = EmitCFICommon();
331 MCCFIInstruction Instruction =
332 MCCFIInstruction::createOffset(Label, Register, Offset);
333 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
334 CurFrame->Instructions.push_back(Instruction);
337 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
338 MCSymbol *Label = EmitCFICommon();
339 MCCFIInstruction Instruction =
340 MCCFIInstruction::createRelOffset(Label, Register, Offset);
341 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
342 CurFrame->Instructions.push_back(Instruction);
345 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
348 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
349 CurFrame->Personality = Sym;
350 CurFrame->PersonalityEncoding = Encoding;
353 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
355 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
356 CurFrame->Lsda = Sym;
357 CurFrame->LsdaEncoding = Encoding;
360 void MCStreamer::EmitCFIRememberState() {
361 MCSymbol *Label = EmitCFICommon();
362 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
363 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
364 CurFrame->Instructions.push_back(Instruction);
367 void MCStreamer::EmitCFIRestoreState() {
368 // FIXME: Error if there is no matching cfi_remember_state.
369 MCSymbol *Label = EmitCFICommon();
370 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
371 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
372 CurFrame->Instructions.push_back(Instruction);
375 void MCStreamer::EmitCFISameValue(int64_t Register) {
376 MCSymbol *Label = EmitCFICommon();
377 MCCFIInstruction Instruction =
378 MCCFIInstruction::createSameValue(Label, Register);
379 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
380 CurFrame->Instructions.push_back(Instruction);
383 void MCStreamer::EmitCFIRestore(int64_t Register) {
384 MCSymbol *Label = EmitCFICommon();
385 MCCFIInstruction Instruction =
386 MCCFIInstruction::createRestore(Label, Register);
387 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
388 CurFrame->Instructions.push_back(Instruction);
391 void MCStreamer::EmitCFIEscape(StringRef Values) {
392 MCSymbol *Label = EmitCFICommon();
393 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
394 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
395 CurFrame->Instructions.push_back(Instruction);
398 void MCStreamer::EmitCFISignalFrame() {
400 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
401 CurFrame->IsSignalFrame = true;
404 void MCStreamer::EmitCFIUndefined(int64_t Register) {
405 MCSymbol *Label = EmitCFICommon();
406 MCCFIInstruction Instruction =
407 MCCFIInstruction::createUndefined(Label, Register);
408 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
409 CurFrame->Instructions.push_back(Instruction);
412 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
413 MCSymbol *Label = EmitCFICommon();
414 MCCFIInstruction Instruction =
415 MCCFIInstruction::createRegister(Label, Register1, Register2);
416 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
417 CurFrame->Instructions.push_back(Instruction);
420 void MCStreamer::EmitCFIWindowSave() {
421 MCSymbol *Label = EmitCFICommon();
422 MCCFIInstruction Instruction =
423 MCCFIInstruction::createWindowSave(Label);
424 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
425 CurFrame->Instructions.push_back(Instruction);
428 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
429 W64UnwindInfos.push_back(Frame);
430 CurrentW64UnwindInfo = W64UnwindInfos.back();
433 void MCStreamer::EnsureValidW64UnwindInfo() {
434 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
435 if (!CurFrame || CurFrame->End)
436 report_fatal_error("No open Win64 EH frame function!");
439 void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
440 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
441 if (CurFrame && !CurFrame->End)
442 report_fatal_error("Starting a function before ending the previous one!");
443 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
444 Frame->Begin = getContext().CreateTempSymbol();
445 Frame->Function = Symbol;
446 EmitLabel(Frame->Begin);
447 setCurrentW64UnwindInfo(Frame);
450 void MCStreamer::EmitWin64EHEndProc() {
451 EnsureValidW64UnwindInfo();
452 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
453 if (CurFrame->ChainedParent)
454 report_fatal_error("Not all chained regions terminated!");
455 CurFrame->End = getContext().CreateTempSymbol();
456 EmitLabel(CurFrame->End);
459 void MCStreamer::EmitWin64EHStartChained() {
460 EnsureValidW64UnwindInfo();
461 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
462 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
463 Frame->Begin = getContext().CreateTempSymbol();
464 Frame->Function = CurFrame->Function;
465 Frame->ChainedParent = CurFrame;
466 EmitLabel(Frame->Begin);
467 setCurrentW64UnwindInfo(Frame);
470 void MCStreamer::EmitWin64EHEndChained() {
471 EnsureValidW64UnwindInfo();
472 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
473 if (!CurFrame->ChainedParent)
474 report_fatal_error("End of a chained region outside a chained region!");
475 CurFrame->End = getContext().CreateTempSymbol();
476 EmitLabel(CurFrame->End);
477 CurrentW64UnwindInfo = CurFrame->ChainedParent;
480 void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
482 EnsureValidW64UnwindInfo();
483 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
484 if (CurFrame->ChainedParent)
485 report_fatal_error("Chained unwind areas can't have handlers!");
486 CurFrame->ExceptionHandler = Sym;
487 if (!Except && !Unwind)
488 report_fatal_error("Don't know what kind of handler this is!");
490 CurFrame->HandlesUnwind = true;
492 CurFrame->HandlesExceptions = true;
495 void MCStreamer::EmitWin64EHHandlerData() {
496 EnsureValidW64UnwindInfo();
497 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
498 if (CurFrame->ChainedParent)
499 report_fatal_error("Chained unwind areas can't have handlers!");
502 void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
503 EnsureValidW64UnwindInfo();
504 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
505 MCSymbol *Label = getContext().CreateTempSymbol();
506 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
508 CurFrame->Instructions.push_back(Inst);
511 void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
512 EnsureValidW64UnwindInfo();
513 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
514 if (CurFrame->LastFrameInst >= 0)
515 report_fatal_error("Frame register and offset already specified!");
517 report_fatal_error("Misaligned frame pointer offset!");
518 MCSymbol *Label = getContext().CreateTempSymbol();
519 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
521 CurFrame->LastFrameInst = CurFrame->Instructions.size();
522 CurFrame->Instructions.push_back(Inst);
525 void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
526 EnsureValidW64UnwindInfo();
528 report_fatal_error("Misaligned stack allocation!");
529 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
530 MCSymbol *Label = getContext().CreateTempSymbol();
531 MCWin64EHInstruction Inst(Label, Size);
533 CurFrame->Instructions.push_back(Inst);
536 void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
537 EnsureValidW64UnwindInfo();
539 report_fatal_error("Misaligned saved register offset!");
540 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
541 MCSymbol *Label = getContext().CreateTempSymbol();
542 MCWin64EHInstruction Inst(
543 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
544 Label, Register, Offset);
546 CurFrame->Instructions.push_back(Inst);
549 void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
550 EnsureValidW64UnwindInfo();
552 report_fatal_error("Misaligned saved vector register offset!");
553 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
554 MCSymbol *Label = getContext().CreateTempSymbol();
555 MCWin64EHInstruction Inst(
556 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
557 Label, Register, Offset);
559 CurFrame->Instructions.push_back(Inst);
562 void MCStreamer::EmitWin64EHPushFrame(bool Code) {
563 EnsureValidW64UnwindInfo();
564 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
565 if (CurFrame->Instructions.size() > 0)
566 report_fatal_error("If present, PushMachFrame must be the first UOP");
567 MCSymbol *Label = getContext().CreateTempSymbol();
568 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
570 CurFrame->Instructions.push_back(Inst);
573 void MCStreamer::EmitWin64EHEndProlog() {
574 EnsureValidW64UnwindInfo();
575 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
576 CurFrame->PrologEnd = getContext().CreateTempSymbol();
577 EmitLabel(CurFrame->PrologEnd);
580 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
581 llvm_unreachable("This file format doesn't support this directive");
584 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
585 llvm_unreachable("This file format doesn't support this directive");
588 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
589 /// the specified string in the output .s file. This capability is
590 /// indicated by the hasRawTextSupport() predicate.
591 void MCStreamer::EmitRawTextImpl(StringRef String) {
592 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
593 " something must not be fully mc'ized\n";
597 void MCStreamer::EmitRawText(const Twine &T) {
598 SmallString<128> Str;
599 EmitRawTextImpl(T.toStringRef(Str));
602 void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
603 if (!getNumFrameInfos())
607 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
610 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
613 void MCStreamer::EmitW64Tables() {
614 if (!getNumW64UnwindInfos())
617 MCWin64EHUnwindEmitter::Emit(*this);
620 void MCStreamer::Finish() {
621 if (!FrameInfos.empty() && !FrameInfos.back().End)
622 report_fatal_error("Unfinished frame!");
627 MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
628 report_fatal_error("Not supported!");
629 return *(static_cast<MCSymbolData*>(0));