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 void MCTargetStreamer::finish() {}
37 void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
39 MCStreamer::MCStreamer(MCContext &Ctx)
40 : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
41 CurrentW64UnwindInfo(0), LastSymbol(0) {
42 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
45 MCStreamer::~MCStreamer() {
46 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
47 delete W64UnwindInfos[i];
50 void MCStreamer::reset() {
51 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
52 delete W64UnwindInfos[i];
53 W64UnwindInfos.clear();
55 EmitDebugFrame = false;
56 CurrentW64UnwindInfo = 0;
59 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
62 const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
65 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
67 MCSymbolRefExpr::Create(A, Variant, Context);
69 MCSymbolRefExpr::Create(B, Variant, Context);
70 const MCExpr *AddrDelta =
71 MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
75 const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
76 assert(!isa<MCSymbolRefExpr>(Expr));
77 if (Context.getAsmInfo()->hasAggressiveSymbolFolding())
80 MCSymbol *ABS = Context.CreateTempSymbol();
81 EmitAssignment(ABS, Expr);
82 return MCSymbolRefExpr::Create(ABS, Context);
85 raw_ostream &MCStreamer::GetCommentOS() {
86 // By default, discard comments.
90 void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
92 void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
93 for (std::vector<MCDwarfFrameInfo>::iterator I = FrameInfos.begin(),
94 E = FrameInfos.end(); I != E; ++I)
95 I->CompactUnwindEncoding =
96 (MAB ? MAB->generateCompactUnwindEncoding(I->Instructions) : 0);
99 void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
100 const MCSymbol *Label, int PointerSize) {
101 // emit the sequence to set the address
102 EmitIntValue(dwarf::DW_LNS_extended_op, 1);
103 EmitULEB128IntValue(PointerSize + 1);
104 EmitIntValue(dwarf::DW_LNE_set_address, 1);
105 EmitSymbolValue(Label, PointerSize);
107 // emit the sequence for the LineDelta (from 1) and a zero address delta.
108 MCDwarfLineAddr::Emit(this, LineDelta, 0);
111 /// EmitIntValue - Special case of EmitValue that avoids the client having to
112 /// pass in a MCExpr for constant integers.
113 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
114 assert(Size <= 8 && "Invalid size");
115 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
118 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
119 for (unsigned i = 0; i != Size; ++i) {
120 unsigned index = isLittleEndian ? i : (Size - i - 1);
121 buf[i] = uint8_t(Value >> (index * 8));
123 EmitBytes(StringRef(buf, Size));
126 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
127 /// client having to pass in a MCExpr for constant integers.
128 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
129 SmallString<128> Tmp;
130 raw_svector_ostream OSE(Tmp);
131 encodeULEB128(Value, OSE, Padding);
132 EmitBytes(OSE.str());
135 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
136 /// client having to pass in a MCExpr for constant integers.
137 void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
138 SmallString<128> Tmp;
139 raw_svector_ostream OSE(Tmp);
140 encodeSLEB128(Value, OSE);
141 EmitBytes(OSE.str());
144 void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) {
145 const MCExpr *ABS = ForceExpAbs(Value);
146 EmitValue(ABS, Size);
150 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
151 EmitValueImpl(Value, Size);
154 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
155 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
158 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
159 report_fatal_error("unsupported directive in streamer");
162 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
163 report_fatal_error("unsupported directive in streamer");
166 /// EmitFill - Emit NumBytes bytes worth of the value specified by
167 /// FillValue. This implements directives such as '.space'.
168 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
169 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
170 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
174 /// The implementation in this class just redirects to EmitFill.
175 void MCStreamer::EmitZeros(uint64_t NumBytes) {
176 EmitFill(NumBytes, 0);
179 unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
181 StringRef Filename, unsigned CUID) {
182 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID);
185 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
186 unsigned Column, unsigned Flags,
188 unsigned Discriminator,
189 StringRef FileName) {
190 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
194 MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
195 if (FrameInfos.empty())
197 return &FrameInfos.back();
200 void MCStreamer::EnsureValidFrame() {
201 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
202 if (!CurFrame || CurFrame->End)
203 report_fatal_error("No open frame");
206 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
207 MCSymbol *EHSymbol) {
210 void MCStreamer::InitSections() {
211 SwitchSection(getContext().getObjectFileInfo()->getTextSection());
214 void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
216 Symbol->setSection(*Section);
218 Symbol->setUndefined();
220 // As we emit symbols into a section, track the order so that they can
221 // be sorted upon later. Zero is reserved to mean 'unemitted'.
222 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
225 void MCStreamer::EmitLabel(MCSymbol *Symbol) {
226 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
227 assert(getCurrentSection().first && "Cannot emit before setting section!");
228 AssignSection(Symbol, getCurrentSection().first);
231 MCTargetStreamer *TS = getTargetStreamer();
233 TS->emitLabel(Symbol);
236 void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
237 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
238 assert(getCurrentSection().first && "Cannot emit before setting section!");
239 AssignSection(Symbol, getCurrentSection().first);
243 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
245 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
246 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
249 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
252 EmitDebugFrame = Debug;
255 void MCStreamer::EmitCFIStartProc(bool IsSimple) {
256 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
257 if (CurFrame && !CurFrame->End)
258 report_fatal_error("Starting a frame before finishing the previous one!");
260 MCDwarfFrameInfo Frame;
261 Frame.IsSimple = IsSimple;
262 EmitCFIStartProcImpl(Frame);
264 FrameInfos.push_back(Frame);
267 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
270 void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
271 Frame.Function = LastSymbol;
272 // We need to create a local symbol to avoid relocations.
273 Frame.Begin = getContext().CreateTempSymbol();
274 EmitLabel(Frame.Begin);
277 void MCStreamer::EmitCFIEndProc() {
279 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
280 EmitCFIEndProcImpl(*CurFrame);
283 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
286 void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
287 Frame.End = getContext().CreateTempSymbol();
288 EmitLabel(Frame.End);
291 MCSymbol *MCStreamer::EmitCFICommon() {
293 MCSymbol *Label = getContext().CreateTempSymbol();
298 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
299 MCSymbol *Label = EmitCFICommon();
300 MCCFIInstruction Instruction =
301 MCCFIInstruction::createDefCfa(Label, Register, Offset);
302 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
303 CurFrame->Instructions.push_back(Instruction);
306 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
307 MCSymbol *Label = EmitCFICommon();
308 MCCFIInstruction Instruction =
309 MCCFIInstruction::createDefCfaOffset(Label, Offset);
310 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
311 CurFrame->Instructions.push_back(Instruction);
314 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
315 MCSymbol *Label = EmitCFICommon();
316 MCCFIInstruction Instruction =
317 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
318 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
319 CurFrame->Instructions.push_back(Instruction);
322 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
323 MCSymbol *Label = EmitCFICommon();
324 MCCFIInstruction Instruction =
325 MCCFIInstruction::createDefCfaRegister(Label, Register);
326 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
327 CurFrame->Instructions.push_back(Instruction);
330 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
331 MCSymbol *Label = EmitCFICommon();
332 MCCFIInstruction Instruction =
333 MCCFIInstruction::createOffset(Label, Register, Offset);
334 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
335 CurFrame->Instructions.push_back(Instruction);
338 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
339 MCSymbol *Label = EmitCFICommon();
340 MCCFIInstruction Instruction =
341 MCCFIInstruction::createRelOffset(Label, Register, Offset);
342 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
343 CurFrame->Instructions.push_back(Instruction);
346 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
349 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
350 CurFrame->Personality = Sym;
351 CurFrame->PersonalityEncoding = Encoding;
354 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
356 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
357 CurFrame->Lsda = Sym;
358 CurFrame->LsdaEncoding = Encoding;
361 void MCStreamer::EmitCFIRememberState() {
362 MCSymbol *Label = EmitCFICommon();
363 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
364 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
365 CurFrame->Instructions.push_back(Instruction);
368 void MCStreamer::EmitCFIRestoreState() {
369 // FIXME: Error if there is no matching cfi_remember_state.
370 MCSymbol *Label = EmitCFICommon();
371 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
372 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
373 CurFrame->Instructions.push_back(Instruction);
376 void MCStreamer::EmitCFISameValue(int64_t Register) {
377 MCSymbol *Label = EmitCFICommon();
378 MCCFIInstruction Instruction =
379 MCCFIInstruction::createSameValue(Label, Register);
380 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
381 CurFrame->Instructions.push_back(Instruction);
384 void MCStreamer::EmitCFIRestore(int64_t Register) {
385 MCSymbol *Label = EmitCFICommon();
386 MCCFIInstruction Instruction =
387 MCCFIInstruction::createRestore(Label, Register);
388 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
389 CurFrame->Instructions.push_back(Instruction);
392 void MCStreamer::EmitCFIEscape(StringRef Values) {
393 MCSymbol *Label = EmitCFICommon();
394 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
395 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
396 CurFrame->Instructions.push_back(Instruction);
399 void MCStreamer::EmitCFISignalFrame() {
401 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
402 CurFrame->IsSignalFrame = true;
405 void MCStreamer::EmitCFIUndefined(int64_t Register) {
406 MCSymbol *Label = EmitCFICommon();
407 MCCFIInstruction Instruction =
408 MCCFIInstruction::createUndefined(Label, Register);
409 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
410 CurFrame->Instructions.push_back(Instruction);
413 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
414 MCSymbol *Label = EmitCFICommon();
415 MCCFIInstruction Instruction =
416 MCCFIInstruction::createRegister(Label, Register1, Register2);
417 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
418 CurFrame->Instructions.push_back(Instruction);
421 void MCStreamer::EmitCFIWindowSave() {
422 MCSymbol *Label = EmitCFICommon();
423 MCCFIInstruction Instruction =
424 MCCFIInstruction::createWindowSave(Label);
425 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
426 CurFrame->Instructions.push_back(Instruction);
429 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
430 W64UnwindInfos.push_back(Frame);
431 CurrentW64UnwindInfo = W64UnwindInfos.back();
434 void MCStreamer::EnsureValidW64UnwindInfo() {
435 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
436 if (!CurFrame || CurFrame->End)
437 report_fatal_error("No open Win64 EH frame function!");
440 void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
441 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
442 if (CurFrame && !CurFrame->End)
443 report_fatal_error("Starting a function before ending the previous one!");
444 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
445 Frame->Begin = getContext().CreateTempSymbol();
446 Frame->Function = Symbol;
447 EmitLabel(Frame->Begin);
448 setCurrentW64UnwindInfo(Frame);
451 void MCStreamer::EmitWin64EHEndProc() {
452 EnsureValidW64UnwindInfo();
453 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
454 if (CurFrame->ChainedParent)
455 report_fatal_error("Not all chained regions terminated!");
456 CurFrame->End = getContext().CreateTempSymbol();
457 EmitLabel(CurFrame->End);
460 void MCStreamer::EmitWin64EHStartChained() {
461 EnsureValidW64UnwindInfo();
462 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
463 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
464 Frame->Begin = getContext().CreateTempSymbol();
465 Frame->Function = CurFrame->Function;
466 Frame->ChainedParent = CurFrame;
467 EmitLabel(Frame->Begin);
468 setCurrentW64UnwindInfo(Frame);
471 void MCStreamer::EmitWin64EHEndChained() {
472 EnsureValidW64UnwindInfo();
473 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
474 if (!CurFrame->ChainedParent)
475 report_fatal_error("End of a chained region outside a chained region!");
476 CurFrame->End = getContext().CreateTempSymbol();
477 EmitLabel(CurFrame->End);
478 CurrentW64UnwindInfo = CurFrame->ChainedParent;
481 void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
483 EnsureValidW64UnwindInfo();
484 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
485 if (CurFrame->ChainedParent)
486 report_fatal_error("Chained unwind areas can't have handlers!");
487 CurFrame->ExceptionHandler = Sym;
488 if (!Except && !Unwind)
489 report_fatal_error("Don't know what kind of handler this is!");
491 CurFrame->HandlesUnwind = true;
493 CurFrame->HandlesExceptions = true;
496 void MCStreamer::EmitWin64EHHandlerData() {
497 EnsureValidW64UnwindInfo();
498 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
499 if (CurFrame->ChainedParent)
500 report_fatal_error("Chained unwind areas can't have handlers!");
503 void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
504 EnsureValidW64UnwindInfo();
505 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
506 MCSymbol *Label = getContext().CreateTempSymbol();
507 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
509 CurFrame->Instructions.push_back(Inst);
512 void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
513 EnsureValidW64UnwindInfo();
514 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
515 if (CurFrame->LastFrameInst >= 0)
516 report_fatal_error("Frame register and offset already specified!");
518 report_fatal_error("Misaligned frame pointer offset!");
519 MCSymbol *Label = getContext().CreateTempSymbol();
520 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
522 CurFrame->LastFrameInst = CurFrame->Instructions.size();
523 CurFrame->Instructions.push_back(Inst);
526 void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
527 EnsureValidW64UnwindInfo();
529 report_fatal_error("Misaligned stack allocation!");
530 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
531 MCSymbol *Label = getContext().CreateTempSymbol();
532 MCWin64EHInstruction Inst(Label, Size);
534 CurFrame->Instructions.push_back(Inst);
537 void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
538 EnsureValidW64UnwindInfo();
540 report_fatal_error("Misaligned saved register offset!");
541 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
542 MCSymbol *Label = getContext().CreateTempSymbol();
543 MCWin64EHInstruction Inst(
544 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
545 Label, Register, Offset);
547 CurFrame->Instructions.push_back(Inst);
550 void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
551 EnsureValidW64UnwindInfo();
553 report_fatal_error("Misaligned saved vector register offset!");
554 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
555 MCSymbol *Label = getContext().CreateTempSymbol();
556 MCWin64EHInstruction Inst(
557 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
558 Label, Register, Offset);
560 CurFrame->Instructions.push_back(Inst);
563 void MCStreamer::EmitWin64EHPushFrame(bool Code) {
564 EnsureValidW64UnwindInfo();
565 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
566 if (CurFrame->Instructions.size() > 0)
567 report_fatal_error("If present, PushMachFrame must be the first UOP");
568 MCSymbol *Label = getContext().CreateTempSymbol();
569 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
571 CurFrame->Instructions.push_back(Inst);
574 void MCStreamer::EmitWin64EHEndProlog() {
575 EnsureValidW64UnwindInfo();
576 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
577 CurFrame->PrologEnd = getContext().CreateTempSymbol();
578 EmitLabel(CurFrame->PrologEnd);
581 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
582 llvm_unreachable("This file format doesn't support this directive");
585 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
586 llvm_unreachable("This file format doesn't support this directive");
589 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
590 /// the specified string in the output .s file. This capability is
591 /// indicated by the hasRawTextSupport() predicate.
592 void MCStreamer::EmitRawTextImpl(StringRef String) {
593 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
594 " something must not be fully mc'ized\n";
598 void MCStreamer::EmitRawText(const Twine &T) {
599 SmallString<128> Str;
600 EmitRawTextImpl(T.toStringRef(Str));
603 void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
604 if (!getNumFrameInfos())
608 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
611 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
614 void MCStreamer::EmitW64Tables() {
615 if (!getNumW64UnwindInfos())
618 MCWin64EHUnwindEmitter::Emit(*this);
621 void MCStreamer::Finish() {
622 if (!FrameInfos.empty() && !FrameInfos.back().End)
623 report_fatal_error("Unfinished frame!");
625 MCTargetStreamer *TS = getTargetStreamer();
632 MCSymbolData &MCStreamer::getOrCreateSymbolData(const MCSymbol *Symbol) {
633 report_fatal_error("Not supported!");
634 return *(static_cast<MCSymbolData*>(0));
637 void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
638 Symbol->setVariableValue(Value);
640 MCTargetStreamer *TS = getTargetStreamer();
642 TS->emitAssignment(Symbol, Value);