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(nullptr), LastSymbol(nullptr) {
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 = nullptr;
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,
152 EmitValueImpl(Value, Size, Loc);
155 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
156 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
159 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
160 report_fatal_error("unsupported directive in streamer");
163 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
164 report_fatal_error("unsupported directive in streamer");
167 /// EmitFill - Emit NumBytes bytes worth of the value specified by
168 /// FillValue. This implements directives such as '.space'.
169 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
170 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
171 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
175 /// The implementation in this class just redirects to EmitFill.
176 void MCStreamer::EmitZeros(uint64_t NumBytes) {
177 EmitFill(NumBytes, 0);
180 unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
182 StringRef Filename, unsigned CUID) {
183 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID);
186 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
187 unsigned Column, unsigned Flags,
189 unsigned Discriminator,
190 StringRef FileName) {
191 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
195 MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
196 MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
197 if (!Table.getLabel()) {
198 StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
200 Context.GetOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
202 return Table.getLabel();
205 MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
206 if (FrameInfos.empty())
208 return &FrameInfos.back();
211 void MCStreamer::EnsureValidFrame() {
212 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
213 if (!CurFrame || CurFrame->End)
214 report_fatal_error("No open frame");
217 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
218 MCSymbol *EHSymbol) {
221 void MCStreamer::InitSections() {
222 SwitchSection(getContext().getObjectFileInfo()->getTextSection());
225 void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
227 Symbol->setSection(*Section);
229 Symbol->setUndefined();
231 // As we emit symbols into a section, track the order so that they can
232 // be sorted upon later. Zero is reserved to mean 'unemitted'.
233 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
236 void MCStreamer::EmitLabel(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);
242 MCTargetStreamer *TS = getTargetStreamer();
244 TS->emitLabel(Symbol);
247 void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
248 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
249 assert(getCurrentSection().first && "Cannot emit before setting section!");
250 AssignSection(Symbol, getCurrentSection().first);
254 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
256 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
257 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
260 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
263 EmitDebugFrame = Debug;
266 void MCStreamer::EmitCFIStartProc(bool IsSimple) {
267 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
268 if (CurFrame && !CurFrame->End)
269 report_fatal_error("Starting a frame before finishing the previous one!");
271 MCDwarfFrameInfo Frame;
272 Frame.IsSimple = IsSimple;
273 EmitCFIStartProcImpl(Frame);
275 FrameInfos.push_back(Frame);
278 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
281 void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
282 // Report an error if we haven't seen a symbol yet where we'd bind
285 report_fatal_error("No symbol to start a frame");
286 Frame.Function = LastSymbol;
287 // We need to create a local symbol to avoid relocations.
288 Frame.Begin = getContext().CreateTempSymbol();
289 EmitLabel(Frame.Begin);
292 void MCStreamer::EmitCFIEndProc() {
294 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
295 EmitCFIEndProcImpl(*CurFrame);
298 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
301 void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
302 Frame.End = getContext().CreateTempSymbol();
303 EmitLabel(Frame.End);
306 MCSymbol *MCStreamer::EmitCFICommon() {
308 MCSymbol *Label = getContext().CreateTempSymbol();
313 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
314 MCSymbol *Label = EmitCFICommon();
315 MCCFIInstruction Instruction =
316 MCCFIInstruction::createDefCfa(Label, Register, Offset);
317 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
318 CurFrame->Instructions.push_back(Instruction);
321 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
322 MCSymbol *Label = EmitCFICommon();
323 MCCFIInstruction Instruction =
324 MCCFIInstruction::createDefCfaOffset(Label, Offset);
325 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
326 CurFrame->Instructions.push_back(Instruction);
329 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
330 MCSymbol *Label = EmitCFICommon();
331 MCCFIInstruction Instruction =
332 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
333 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
334 CurFrame->Instructions.push_back(Instruction);
337 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
338 MCSymbol *Label = EmitCFICommon();
339 MCCFIInstruction Instruction =
340 MCCFIInstruction::createDefCfaRegister(Label, Register);
341 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
342 CurFrame->Instructions.push_back(Instruction);
345 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
346 MCSymbol *Label = EmitCFICommon();
347 MCCFIInstruction Instruction =
348 MCCFIInstruction::createOffset(Label, Register, Offset);
349 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
350 CurFrame->Instructions.push_back(Instruction);
353 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
354 MCSymbol *Label = EmitCFICommon();
355 MCCFIInstruction Instruction =
356 MCCFIInstruction::createRelOffset(Label, Register, Offset);
357 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
358 CurFrame->Instructions.push_back(Instruction);
361 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
364 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
365 CurFrame->Personality = Sym;
366 CurFrame->PersonalityEncoding = Encoding;
369 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
371 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
372 CurFrame->Lsda = Sym;
373 CurFrame->LsdaEncoding = Encoding;
376 void MCStreamer::EmitCFIRememberState() {
377 MCSymbol *Label = EmitCFICommon();
378 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
379 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
380 CurFrame->Instructions.push_back(Instruction);
383 void MCStreamer::EmitCFIRestoreState() {
384 // FIXME: Error if there is no matching cfi_remember_state.
385 MCSymbol *Label = EmitCFICommon();
386 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
387 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
388 CurFrame->Instructions.push_back(Instruction);
391 void MCStreamer::EmitCFISameValue(int64_t Register) {
392 MCSymbol *Label = EmitCFICommon();
393 MCCFIInstruction Instruction =
394 MCCFIInstruction::createSameValue(Label, Register);
395 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
396 CurFrame->Instructions.push_back(Instruction);
399 void MCStreamer::EmitCFIRestore(int64_t Register) {
400 MCSymbol *Label = EmitCFICommon();
401 MCCFIInstruction Instruction =
402 MCCFIInstruction::createRestore(Label, Register);
403 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
404 CurFrame->Instructions.push_back(Instruction);
407 void MCStreamer::EmitCFIEscape(StringRef Values) {
408 MCSymbol *Label = EmitCFICommon();
409 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
410 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
411 CurFrame->Instructions.push_back(Instruction);
414 void MCStreamer::EmitCFISignalFrame() {
416 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
417 CurFrame->IsSignalFrame = true;
420 void MCStreamer::EmitCFIUndefined(int64_t Register) {
421 MCSymbol *Label = EmitCFICommon();
422 MCCFIInstruction Instruction =
423 MCCFIInstruction::createUndefined(Label, Register);
424 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
425 CurFrame->Instructions.push_back(Instruction);
428 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
429 MCSymbol *Label = EmitCFICommon();
430 MCCFIInstruction Instruction =
431 MCCFIInstruction::createRegister(Label, Register1, Register2);
432 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
433 CurFrame->Instructions.push_back(Instruction);
436 void MCStreamer::EmitCFIWindowSave() {
437 MCSymbol *Label = EmitCFICommon();
438 MCCFIInstruction Instruction =
439 MCCFIInstruction::createWindowSave(Label);
440 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
441 CurFrame->Instructions.push_back(Instruction);
444 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
445 W64UnwindInfos.push_back(Frame);
446 CurrentW64UnwindInfo = W64UnwindInfos.back();
449 void MCStreamer::EnsureValidW64UnwindInfo() {
450 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
451 if (!CurFrame || CurFrame->End)
452 report_fatal_error("No open Win64 EH frame function!");
455 void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
456 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
457 if (CurFrame && !CurFrame->End)
458 report_fatal_error("Starting a function before ending the previous one!");
459 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
460 Frame->Begin = getContext().CreateTempSymbol();
461 Frame->Function = Symbol;
462 EmitLabel(Frame->Begin);
463 setCurrentW64UnwindInfo(Frame);
466 void MCStreamer::EmitWin64EHEndProc() {
467 EnsureValidW64UnwindInfo();
468 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
469 if (CurFrame->ChainedParent)
470 report_fatal_error("Not all chained regions terminated!");
471 CurFrame->End = getContext().CreateTempSymbol();
472 EmitLabel(CurFrame->End);
475 void MCStreamer::EmitWin64EHStartChained() {
476 EnsureValidW64UnwindInfo();
477 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
478 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
479 Frame->Begin = getContext().CreateTempSymbol();
480 Frame->Function = CurFrame->Function;
481 Frame->ChainedParent = CurFrame;
482 EmitLabel(Frame->Begin);
483 setCurrentW64UnwindInfo(Frame);
486 void MCStreamer::EmitWin64EHEndChained() {
487 EnsureValidW64UnwindInfo();
488 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
489 if (!CurFrame->ChainedParent)
490 report_fatal_error("End of a chained region outside a chained region!");
491 CurFrame->End = getContext().CreateTempSymbol();
492 EmitLabel(CurFrame->End);
493 CurrentW64UnwindInfo = CurFrame->ChainedParent;
496 void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
498 EnsureValidW64UnwindInfo();
499 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
500 if (CurFrame->ChainedParent)
501 report_fatal_error("Chained unwind areas can't have handlers!");
502 CurFrame->ExceptionHandler = Sym;
503 if (!Except && !Unwind)
504 report_fatal_error("Don't know what kind of handler this is!");
506 CurFrame->HandlesUnwind = true;
508 CurFrame->HandlesExceptions = true;
511 void MCStreamer::EmitWin64EHHandlerData() {
512 EnsureValidW64UnwindInfo();
513 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
514 if (CurFrame->ChainedParent)
515 report_fatal_error("Chained unwind areas can't have handlers!");
518 void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
519 EnsureValidW64UnwindInfo();
520 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
521 MCSymbol *Label = getContext().CreateTempSymbol();
522 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
524 CurFrame->Instructions.push_back(Inst);
527 void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
528 EnsureValidW64UnwindInfo();
529 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
530 if (CurFrame->LastFrameInst >= 0)
531 report_fatal_error("Frame register and offset already specified!");
533 report_fatal_error("Misaligned frame pointer offset!");
534 MCSymbol *Label = getContext().CreateTempSymbol();
535 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
537 CurFrame->LastFrameInst = CurFrame->Instructions.size();
538 CurFrame->Instructions.push_back(Inst);
541 void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
542 EnsureValidW64UnwindInfo();
544 report_fatal_error("Misaligned stack allocation!");
545 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
546 MCSymbol *Label = getContext().CreateTempSymbol();
547 MCWin64EHInstruction Inst(Label, Size);
549 CurFrame->Instructions.push_back(Inst);
552 void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
553 EnsureValidW64UnwindInfo();
555 report_fatal_error("Misaligned saved register offset!");
556 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
557 MCSymbol *Label = getContext().CreateTempSymbol();
558 MCWin64EHInstruction Inst(
559 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
560 Label, Register, Offset);
562 CurFrame->Instructions.push_back(Inst);
565 void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
566 EnsureValidW64UnwindInfo();
568 report_fatal_error("Misaligned saved vector register offset!");
569 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
570 MCSymbol *Label = getContext().CreateTempSymbol();
571 MCWin64EHInstruction Inst(
572 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
573 Label, Register, Offset);
575 CurFrame->Instructions.push_back(Inst);
578 void MCStreamer::EmitWin64EHPushFrame(bool Code) {
579 EnsureValidW64UnwindInfo();
580 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
581 if (CurFrame->Instructions.size() > 0)
582 report_fatal_error("If present, PushMachFrame must be the first UOP");
583 MCSymbol *Label = getContext().CreateTempSymbol();
584 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
586 CurFrame->Instructions.push_back(Inst);
589 void MCStreamer::EmitWin64EHEndProlog() {
590 EnsureValidW64UnwindInfo();
591 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
592 CurFrame->PrologEnd = getContext().CreateTempSymbol();
593 EmitLabel(CurFrame->PrologEnd);
596 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
597 llvm_unreachable("This file format doesn't support this directive");
600 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
601 llvm_unreachable("This file format doesn't support this directive");
604 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
605 /// the specified string in the output .s file. This capability is
606 /// indicated by the hasRawTextSupport() predicate.
607 void MCStreamer::EmitRawTextImpl(StringRef String) {
608 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
609 " something must not be fully mc'ized\n";
613 void MCStreamer::EmitRawText(const Twine &T) {
614 SmallString<128> Str;
615 EmitRawTextImpl(T.toStringRef(Str));
618 void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
619 if (!getNumFrameInfos())
623 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
626 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
629 void MCStreamer::EmitW64Tables() {
630 if (!getNumW64UnwindInfos())
633 MCWin64EHUnwindEmitter::Emit(*this);
636 void MCStreamer::Finish() {
637 if (!FrameInfos.empty() && !FrameInfos.back().End)
638 report_fatal_error("Unfinished frame!");
640 MCTargetStreamer *TS = getTargetStreamer();
647 MCSymbolData &MCStreamer::getOrCreateSymbolData(const MCSymbol *Symbol) {
648 report_fatal_error("Not supported!");
649 return *(static_cast<MCSymbolData*>(nullptr));
652 void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
653 Symbol->setVariableValue(Value);
655 MCTargetStreamer *TS = getTargetStreamer();
657 TS->emitAssignment(Symbol, Value);