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/MCObjectWriter.h"
18 #include "llvm/MC/MCSymbol.h"
19 #include "llvm/Support/ErrorHandling.h"
20 #include "llvm/Support/LEB128.h"
21 #include "llvm/Support/raw_ostream.h"
25 MCStreamer::MCStreamer(StreamerKind Kind, MCContext &Ctx)
26 : Kind(Kind), Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
27 CurrentW64UnwindInfo(0), LastSymbol(0), AutoInitSections(false) {
28 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
31 MCStreamer::~MCStreamer() {
32 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
33 delete W64UnwindInfos[i];
36 void MCStreamer::reset() {
37 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
38 delete W64UnwindInfos[i];
39 W64UnwindInfos.clear();
41 EmitDebugFrame = false;
42 CurrentW64UnwindInfo = 0;
45 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
48 const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
51 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
53 MCSymbolRefExpr::Create(A, Variant, Context);
55 MCSymbolRefExpr::Create(B, Variant, Context);
56 const MCExpr *AddrDelta =
57 MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
61 const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
62 if (Context.getAsmInfo()->hasAggressiveSymbolFolding() ||
63 isa<MCSymbolRefExpr>(Expr))
66 MCSymbol *ABS = Context.CreateTempSymbol();
67 EmitAssignment(ABS, Expr);
68 return MCSymbolRefExpr::Create(ABS, Context);
71 raw_ostream &MCStreamer::GetCommentOS() {
72 // By default, discard comments.
76 void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
77 for (std::vector<MCDwarfFrameInfo>::iterator I = FrameInfos.begin(),
78 E = FrameInfos.end(); I != E; ++I)
79 I->CompactUnwindEncoding =
80 (MAB ? MAB->generateCompactUnwindEncoding(I->Instructions) : 0);
83 void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
84 const MCSymbol *Label, int PointerSize) {
85 // emit the sequence to set the address
86 EmitIntValue(dwarf::DW_LNS_extended_op, 1);
87 EmitULEB128IntValue(PointerSize + 1);
88 EmitIntValue(dwarf::DW_LNE_set_address, 1);
89 EmitSymbolValue(Label, PointerSize);
91 // emit the sequence for the LineDelta (from 1) and a zero address delta.
92 MCDwarfLineAddr::Emit(this, LineDelta, 0);
95 /// EmitIntValue - Special case of EmitValue that avoids the client having to
96 /// pass in a MCExpr for constant integers.
97 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
98 assert(Size <= 8 && "Invalid size");
99 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
102 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
103 for (unsigned i = 0; i != Size; ++i) {
104 unsigned index = isLittleEndian ? i : (Size - i - 1);
105 buf[i] = uint8_t(Value >> (index * 8));
107 EmitBytes(StringRef(buf, Size));
110 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
111 /// client having to pass in a MCExpr for constant integers.
112 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
113 SmallString<128> Tmp;
114 raw_svector_ostream OSE(Tmp);
115 encodeULEB128(Value, OSE, Padding);
116 EmitBytes(OSE.str());
119 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
120 /// client having to pass in a MCExpr for constant integers.
121 void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
122 SmallString<128> Tmp;
123 raw_svector_ostream OSE(Tmp);
124 encodeSLEB128(Value, OSE);
125 EmitBytes(OSE.str());
128 void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) {
129 const MCExpr *ABS = ForceExpAbs(Value);
130 EmitValue(ABS, Size);
134 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
135 EmitValueImpl(Value, Size);
138 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
139 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
142 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
143 report_fatal_error("unsupported directive in streamer");
146 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
147 report_fatal_error("unsupported directive in streamer");
150 /// EmitFill - Emit NumBytes bytes worth of the value specified by
151 /// FillValue. This implements directives such as '.space'.
152 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
153 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
154 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
158 /// The implementation in this class just redirects to EmitFill.
159 void MCStreamer::EmitZeros(uint64_t NumBytes) {
160 EmitFill(NumBytes, 0);
163 bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
165 StringRef Filename, unsigned CUID) {
166 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID) == 0;
169 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
170 unsigned Column, unsigned Flags,
172 unsigned Discriminator,
173 StringRef FileName) {
174 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
178 MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
179 if (FrameInfos.empty())
181 return &FrameInfos.back();
184 void MCStreamer::EnsureValidFrame() {
185 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
186 if (!CurFrame || CurFrame->End)
187 report_fatal_error("No open frame");
190 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
191 MCSymbol *EHSymbol) {
194 void MCStreamer::EmitLabel(MCSymbol *Symbol) {
195 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
196 assert(getCurrentSection().first && "Cannot emit before setting section!");
197 Symbol->setSection(*getCurrentSection().first);
201 void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
202 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
203 assert(getCurrentSection().first && "Cannot emit before setting section!");
204 Symbol->setSection(*getCurrentSection().first);
208 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
210 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
211 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
214 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
217 EmitDebugFrame = Debug;
220 void MCStreamer::EmitCFIStartProc() {
221 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
222 if (CurFrame && !CurFrame->End)
223 report_fatal_error("Starting a frame before finishing the previous one!");
225 MCDwarfFrameInfo Frame;
226 EmitCFIStartProcImpl(Frame);
228 FrameInfos.push_back(Frame);
231 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
234 void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
235 Frame.Function = LastSymbol;
236 // If the function is externally visible, we need to create a local
237 // symbol to avoid relocations.
238 StringRef Prefix = getContext().getAsmInfo()->getPrivateGlobalPrefix();
239 if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
240 Frame.Begin = LastSymbol;
242 Frame.Begin = getContext().CreateTempSymbol();
243 EmitLabel(Frame.Begin);
247 void MCStreamer::EmitCFIEndProc() {
249 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
250 EmitCFIEndProcImpl(*CurFrame);
253 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
256 void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
257 Frame.End = getContext().CreateTempSymbol();
258 EmitLabel(Frame.End);
261 MCSymbol *MCStreamer::EmitCFICommon() {
263 MCSymbol *Label = getContext().CreateTempSymbol();
268 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
269 MCSymbol *Label = EmitCFICommon();
270 MCCFIInstruction Instruction =
271 MCCFIInstruction::createDefCfa(Label, Register, Offset);
272 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
273 CurFrame->Instructions.push_back(Instruction);
276 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
277 MCSymbol *Label = EmitCFICommon();
278 MCCFIInstruction Instruction =
279 MCCFIInstruction::createDefCfaOffset(Label, Offset);
280 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
281 CurFrame->Instructions.push_back(Instruction);
284 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
285 MCSymbol *Label = EmitCFICommon();
286 MCCFIInstruction Instruction =
287 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
288 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
289 CurFrame->Instructions.push_back(Instruction);
292 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
293 MCSymbol *Label = EmitCFICommon();
294 MCCFIInstruction Instruction =
295 MCCFIInstruction::createDefCfaRegister(Label, Register);
296 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
297 CurFrame->Instructions.push_back(Instruction);
300 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
301 MCSymbol *Label = EmitCFICommon();
302 MCCFIInstruction Instruction =
303 MCCFIInstruction::createOffset(Label, Register, Offset);
304 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
305 CurFrame->Instructions.push_back(Instruction);
308 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
309 MCSymbol *Label = EmitCFICommon();
310 MCCFIInstruction Instruction =
311 MCCFIInstruction::createRelOffset(Label, Register, Offset);
312 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
313 CurFrame->Instructions.push_back(Instruction);
316 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
319 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
320 CurFrame->Personality = Sym;
321 CurFrame->PersonalityEncoding = Encoding;
324 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
326 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
327 CurFrame->Lsda = Sym;
328 CurFrame->LsdaEncoding = Encoding;
331 void MCStreamer::EmitCFIRememberState() {
332 MCSymbol *Label = EmitCFICommon();
333 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
334 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
335 CurFrame->Instructions.push_back(Instruction);
338 void MCStreamer::EmitCFIRestoreState() {
339 // FIXME: Error if there is no matching cfi_remember_state.
340 MCSymbol *Label = EmitCFICommon();
341 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
342 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
343 CurFrame->Instructions.push_back(Instruction);
346 void MCStreamer::EmitCFISameValue(int64_t Register) {
347 MCSymbol *Label = EmitCFICommon();
348 MCCFIInstruction Instruction =
349 MCCFIInstruction::createSameValue(Label, Register);
350 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
351 CurFrame->Instructions.push_back(Instruction);
354 void MCStreamer::EmitCFIRestore(int64_t Register) {
355 MCSymbol *Label = EmitCFICommon();
356 MCCFIInstruction Instruction =
357 MCCFIInstruction::createRestore(Label, Register);
358 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
359 CurFrame->Instructions.push_back(Instruction);
362 void MCStreamer::EmitCFIEscape(StringRef Values) {
363 MCSymbol *Label = EmitCFICommon();
364 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
365 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
366 CurFrame->Instructions.push_back(Instruction);
369 void MCStreamer::EmitCFISignalFrame() {
371 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
372 CurFrame->IsSignalFrame = true;
375 void MCStreamer::EmitCFIUndefined(int64_t Register) {
376 MCSymbol *Label = EmitCFICommon();
377 MCCFIInstruction Instruction =
378 MCCFIInstruction::createUndefined(Label, Register);
379 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
380 CurFrame->Instructions.push_back(Instruction);
383 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
384 MCSymbol *Label = EmitCFICommon();
385 MCCFIInstruction Instruction =
386 MCCFIInstruction::createRegister(Label, Register1, Register2);
387 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
388 CurFrame->Instructions.push_back(Instruction);
391 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
392 W64UnwindInfos.push_back(Frame);
393 CurrentW64UnwindInfo = W64UnwindInfos.back();
396 void MCStreamer::EnsureValidW64UnwindInfo() {
397 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
398 if (!CurFrame || CurFrame->End)
399 report_fatal_error("No open Win64 EH frame function!");
402 void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
403 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
404 if (CurFrame && !CurFrame->End)
405 report_fatal_error("Starting a function before ending the previous one!");
406 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
407 Frame->Begin = getContext().CreateTempSymbol();
408 Frame->Function = Symbol;
409 EmitLabel(Frame->Begin);
410 setCurrentW64UnwindInfo(Frame);
413 void MCStreamer::EmitWin64EHEndProc() {
414 EnsureValidW64UnwindInfo();
415 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
416 if (CurFrame->ChainedParent)
417 report_fatal_error("Not all chained regions terminated!");
418 CurFrame->End = getContext().CreateTempSymbol();
419 EmitLabel(CurFrame->End);
422 void MCStreamer::EmitWin64EHStartChained() {
423 EnsureValidW64UnwindInfo();
424 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
425 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
426 Frame->Begin = getContext().CreateTempSymbol();
427 Frame->Function = CurFrame->Function;
428 Frame->ChainedParent = CurFrame;
429 EmitLabel(Frame->Begin);
430 setCurrentW64UnwindInfo(Frame);
433 void MCStreamer::EmitWin64EHEndChained() {
434 EnsureValidW64UnwindInfo();
435 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
436 if (!CurFrame->ChainedParent)
437 report_fatal_error("End of a chained region outside a chained region!");
438 CurFrame->End = getContext().CreateTempSymbol();
439 EmitLabel(CurFrame->End);
440 CurrentW64UnwindInfo = CurFrame->ChainedParent;
443 void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
445 EnsureValidW64UnwindInfo();
446 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
447 if (CurFrame->ChainedParent)
448 report_fatal_error("Chained unwind areas can't have handlers!");
449 CurFrame->ExceptionHandler = Sym;
450 if (!Except && !Unwind)
451 report_fatal_error("Don't know what kind of handler this is!");
453 CurFrame->HandlesUnwind = true;
455 CurFrame->HandlesExceptions = true;
458 void MCStreamer::EmitWin64EHHandlerData() {
459 EnsureValidW64UnwindInfo();
460 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
461 if (CurFrame->ChainedParent)
462 report_fatal_error("Chained unwind areas can't have handlers!");
465 void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
466 EnsureValidW64UnwindInfo();
467 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
468 MCSymbol *Label = getContext().CreateTempSymbol();
469 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
471 CurFrame->Instructions.push_back(Inst);
474 void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
475 EnsureValidW64UnwindInfo();
476 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
477 if (CurFrame->LastFrameInst >= 0)
478 report_fatal_error("Frame register and offset already specified!");
480 report_fatal_error("Misaligned frame pointer offset!");
481 MCSymbol *Label = getContext().CreateTempSymbol();
482 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
484 CurFrame->LastFrameInst = CurFrame->Instructions.size();
485 CurFrame->Instructions.push_back(Inst);
488 void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
489 EnsureValidW64UnwindInfo();
491 report_fatal_error("Misaligned stack allocation!");
492 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
493 MCSymbol *Label = getContext().CreateTempSymbol();
494 MCWin64EHInstruction Inst(Label, Size);
496 CurFrame->Instructions.push_back(Inst);
499 void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
500 EnsureValidW64UnwindInfo();
502 report_fatal_error("Misaligned saved register offset!");
503 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
504 MCSymbol *Label = getContext().CreateTempSymbol();
505 MCWin64EHInstruction Inst(
506 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
507 Label, Register, Offset);
509 CurFrame->Instructions.push_back(Inst);
512 void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
513 EnsureValidW64UnwindInfo();
515 report_fatal_error("Misaligned saved vector register offset!");
516 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
517 MCSymbol *Label = getContext().CreateTempSymbol();
518 MCWin64EHInstruction Inst(
519 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
520 Label, Register, Offset);
522 CurFrame->Instructions.push_back(Inst);
525 void MCStreamer::EmitWin64EHPushFrame(bool Code) {
526 EnsureValidW64UnwindInfo();
527 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
528 if (CurFrame->Instructions.size() > 0)
529 report_fatal_error("If present, PushMachFrame must be the first UOP");
530 MCSymbol *Label = getContext().CreateTempSymbol();
531 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
533 CurFrame->Instructions.push_back(Inst);
536 void MCStreamer::EmitWin64EHEndProlog() {
537 EnsureValidW64UnwindInfo();
538 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
539 CurFrame->PrologEnd = getContext().CreateTempSymbol();
540 EmitLabel(CurFrame->PrologEnd);
543 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
544 llvm_unreachable("This file format doesn't support this directive");
547 void MCStreamer::EmitFnStart() {
548 errs() << "Not implemented yet\n";
552 void MCStreamer::EmitFnEnd() {
553 errs() << "Not implemented yet\n";
557 void MCStreamer::EmitCantUnwind() {
558 errs() << "Not implemented yet\n";
562 void MCStreamer::EmitHandlerData() {
563 errs() << "Not implemented yet\n";
567 void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
568 errs() << "Not implemented yet\n";
572 void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
573 errs() << "Not implemented yet\n";
577 void MCStreamer::EmitPad(int64_t Offset) {
578 errs() << "Not implemented yet\n";
582 void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
583 errs() << "Not implemented yet\n";
587 void MCStreamer::EmitTCEntry(const MCSymbol &S) {
588 llvm_unreachable("Unsupported method");
591 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
592 /// the specified string in the output .s file. This capability is
593 /// indicated by the hasRawTextSupport() predicate.
594 void MCStreamer::EmitRawText(StringRef String) {
595 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
596 " something must not be fully mc'ized\n";
600 void MCStreamer::EmitRawText(const Twine &T) {
601 SmallString<128> Str;
603 EmitRawText(Str.str());
606 void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
607 if (!getNumFrameInfos())
611 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
614 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
617 void MCStreamer::EmitW64Tables() {
618 if (!getNumW64UnwindInfos())
621 MCWin64EHUnwindEmitter::Emit(*this);
624 void MCStreamer::Finish() {
625 if (!FrameInfos.empty() && !FrameInfos.back().End)
626 report_fatal_error("Unfinished frame!");
631 MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
632 report_fatal_error("Not supported!");
633 return *(static_cast<MCSymbolData*>(0));