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), CurrentW64UnwindInfo(nullptr) {
41 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
44 MCStreamer::~MCStreamer() {
45 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
46 delete W64UnwindInfos[i];
49 void MCStreamer::reset() {
50 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
51 delete W64UnwindInfos[i];
52 W64UnwindInfos.clear();
53 CurrentW64UnwindInfo = nullptr;
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 assert(!isa<MCSymbolRefExpr>(Expr));
73 if (Context.getAsmInfo()->hasAggressiveSymbolFolding())
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,
148 EmitValueImpl(Value, Size, Loc);
151 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
152 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
155 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
156 report_fatal_error("unsupported directive in streamer");
159 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
160 report_fatal_error("unsupported directive in streamer");
163 /// EmitFill - Emit NumBytes bytes worth of the value specified by
164 /// FillValue. This implements directives such as '.space'.
165 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
166 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
167 for (uint64_t i = 0, e = NumBytes; i != e; ++i)
171 /// The implementation in this class just redirects to EmitFill.
172 void MCStreamer::EmitZeros(uint64_t NumBytes) {
173 EmitFill(NumBytes, 0);
176 unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
178 StringRef Filename, unsigned CUID) {
179 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID);
182 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
183 unsigned Column, unsigned Flags,
185 unsigned Discriminator,
186 StringRef FileName) {
187 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
191 MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
192 MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
193 if (!Table.getLabel()) {
194 StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
196 Context.GetOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
198 return Table.getLabel();
201 MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
202 if (FrameInfos.empty())
204 return &FrameInfos.back();
207 void MCStreamer::EnsureValidFrame() {
208 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
209 if (!CurFrame || CurFrame->End)
210 report_fatal_error("No open frame");
213 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
214 MCSymbol *EHSymbol) {
217 void MCStreamer::InitSections() {
218 SwitchSection(getContext().getObjectFileInfo()->getTextSection());
221 void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
223 Symbol->setSection(*Section);
225 Symbol->setUndefined();
227 // As we emit symbols into a section, track the order so that they can
228 // be sorted upon later. Zero is reserved to mean 'unemitted'.
229 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
232 void MCStreamer::EmitLabel(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);
237 MCTargetStreamer *TS = getTargetStreamer();
239 TS->emitLabel(Symbol);
242 void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
243 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
244 assert(getCurrentSection().first && "Cannot emit before setting section!");
245 AssignSection(Symbol, getCurrentSection().first);
248 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
250 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
251 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
254 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
258 void MCStreamer::EmitCFIStartProc(bool IsSimple) {
259 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
260 if (CurFrame && !CurFrame->End)
261 report_fatal_error("Starting a frame before finishing the previous one!");
263 MCDwarfFrameInfo Frame;
264 Frame.IsSimple = IsSimple;
265 EmitCFIStartProcImpl(Frame);
267 FrameInfos.push_back(Frame);
270 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
273 void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
274 // We need to create a local symbol to avoid relocations.
275 Frame.Begin = getContext().CreateTempSymbol();
276 EmitLabel(Frame.Begin);
279 void MCStreamer::EmitCFIEndProc() {
281 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
282 EmitCFIEndProcImpl(*CurFrame);
285 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
288 void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
289 Frame.End = getContext().CreateTempSymbol();
290 EmitLabel(Frame.End);
293 MCSymbol *MCStreamer::EmitCFICommon() {
295 MCSymbol *Label = getContext().CreateTempSymbol();
300 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
301 MCSymbol *Label = EmitCFICommon();
302 MCCFIInstruction Instruction =
303 MCCFIInstruction::createDefCfa(Label, Register, Offset);
304 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
305 CurFrame->Instructions.push_back(Instruction);
308 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
309 MCSymbol *Label = EmitCFICommon();
310 MCCFIInstruction Instruction =
311 MCCFIInstruction::createDefCfaOffset(Label, Offset);
312 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
313 CurFrame->Instructions.push_back(Instruction);
316 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
317 MCSymbol *Label = EmitCFICommon();
318 MCCFIInstruction Instruction =
319 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
320 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
321 CurFrame->Instructions.push_back(Instruction);
324 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
325 MCSymbol *Label = EmitCFICommon();
326 MCCFIInstruction Instruction =
327 MCCFIInstruction::createDefCfaRegister(Label, Register);
328 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
329 CurFrame->Instructions.push_back(Instruction);
332 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
333 MCSymbol *Label = EmitCFICommon();
334 MCCFIInstruction Instruction =
335 MCCFIInstruction::createOffset(Label, Register, Offset);
336 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
337 CurFrame->Instructions.push_back(Instruction);
340 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
341 MCSymbol *Label = EmitCFICommon();
342 MCCFIInstruction Instruction =
343 MCCFIInstruction::createRelOffset(Label, Register, Offset);
344 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
345 CurFrame->Instructions.push_back(Instruction);
348 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
351 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
352 CurFrame->Personality = Sym;
353 CurFrame->PersonalityEncoding = Encoding;
356 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
358 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
359 CurFrame->Lsda = Sym;
360 CurFrame->LsdaEncoding = Encoding;
363 void MCStreamer::EmitCFIRememberState() {
364 MCSymbol *Label = EmitCFICommon();
365 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
366 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
367 CurFrame->Instructions.push_back(Instruction);
370 void MCStreamer::EmitCFIRestoreState() {
371 // FIXME: Error if there is no matching cfi_remember_state.
372 MCSymbol *Label = EmitCFICommon();
373 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
374 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
375 CurFrame->Instructions.push_back(Instruction);
378 void MCStreamer::EmitCFISameValue(int64_t Register) {
379 MCSymbol *Label = EmitCFICommon();
380 MCCFIInstruction Instruction =
381 MCCFIInstruction::createSameValue(Label, Register);
382 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
383 CurFrame->Instructions.push_back(Instruction);
386 void MCStreamer::EmitCFIRestore(int64_t Register) {
387 MCSymbol *Label = EmitCFICommon();
388 MCCFIInstruction Instruction =
389 MCCFIInstruction::createRestore(Label, Register);
390 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
391 CurFrame->Instructions.push_back(Instruction);
394 void MCStreamer::EmitCFIEscape(StringRef Values) {
395 MCSymbol *Label = EmitCFICommon();
396 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
397 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
398 CurFrame->Instructions.push_back(Instruction);
401 void MCStreamer::EmitCFISignalFrame() {
403 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
404 CurFrame->IsSignalFrame = true;
407 void MCStreamer::EmitCFIUndefined(int64_t Register) {
408 MCSymbol *Label = EmitCFICommon();
409 MCCFIInstruction Instruction =
410 MCCFIInstruction::createUndefined(Label, Register);
411 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
412 CurFrame->Instructions.push_back(Instruction);
415 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
416 MCSymbol *Label = EmitCFICommon();
417 MCCFIInstruction Instruction =
418 MCCFIInstruction::createRegister(Label, Register1, Register2);
419 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
420 CurFrame->Instructions.push_back(Instruction);
423 void MCStreamer::EmitCFIWindowSave() {
424 MCSymbol *Label = EmitCFICommon();
425 MCCFIInstruction Instruction =
426 MCCFIInstruction::createWindowSave(Label);
427 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
428 CurFrame->Instructions.push_back(Instruction);
431 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
432 W64UnwindInfos.push_back(Frame);
433 CurrentW64UnwindInfo = W64UnwindInfos.back();
436 void MCStreamer::EnsureValidW64UnwindInfo() {
437 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
438 if (!CurFrame || CurFrame->End)
439 report_fatal_error("No open Win64 EH frame function!");
442 void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
443 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
444 if (CurFrame && !CurFrame->End)
445 report_fatal_error("Starting a function before ending the previous one!");
446 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
447 Frame->Begin = getContext().CreateTempSymbol();
448 Frame->Function = Symbol;
449 EmitLabel(Frame->Begin);
450 setCurrentW64UnwindInfo(Frame);
453 void MCStreamer::EmitWin64EHEndProc() {
454 EnsureValidW64UnwindInfo();
455 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
456 if (CurFrame->ChainedParent)
457 report_fatal_error("Not all chained regions terminated!");
458 CurFrame->End = getContext().CreateTempSymbol();
459 EmitLabel(CurFrame->End);
462 void MCStreamer::EmitWin64EHStartChained() {
463 EnsureValidW64UnwindInfo();
464 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
465 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
466 Frame->Begin = getContext().CreateTempSymbol();
467 Frame->Function = CurFrame->Function;
468 Frame->ChainedParent = CurFrame;
469 EmitLabel(Frame->Begin);
470 setCurrentW64UnwindInfo(Frame);
473 void MCStreamer::EmitWin64EHEndChained() {
474 EnsureValidW64UnwindInfo();
475 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
476 if (!CurFrame->ChainedParent)
477 report_fatal_error("End of a chained region outside a chained region!");
478 CurFrame->End = getContext().CreateTempSymbol();
479 EmitLabel(CurFrame->End);
480 CurrentW64UnwindInfo = CurFrame->ChainedParent;
483 void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
485 EnsureValidW64UnwindInfo();
486 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
487 if (CurFrame->ChainedParent)
488 report_fatal_error("Chained unwind areas can't have handlers!");
489 CurFrame->ExceptionHandler = Sym;
490 if (!Except && !Unwind)
491 report_fatal_error("Don't know what kind of handler this is!");
493 CurFrame->HandlesUnwind = true;
495 CurFrame->HandlesExceptions = true;
498 void MCStreamer::EmitWin64EHHandlerData() {
499 EnsureValidW64UnwindInfo();
500 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
501 if (CurFrame->ChainedParent)
502 report_fatal_error("Chained unwind areas can't have handlers!");
505 void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
506 EnsureValidW64UnwindInfo();
507 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
508 MCSymbol *Label = getContext().CreateTempSymbol();
509 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
511 CurFrame->Instructions.push_back(Inst);
514 void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
515 EnsureValidW64UnwindInfo();
516 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
517 if (CurFrame->LastFrameInst >= 0)
518 report_fatal_error("Frame register and offset already specified!");
520 report_fatal_error("Misaligned frame pointer offset!");
521 MCSymbol *Label = getContext().CreateTempSymbol();
522 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
524 CurFrame->LastFrameInst = CurFrame->Instructions.size();
525 CurFrame->Instructions.push_back(Inst);
528 void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
529 EnsureValidW64UnwindInfo();
531 report_fatal_error("Misaligned stack allocation!");
532 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
533 MCSymbol *Label = getContext().CreateTempSymbol();
534 MCWin64EHInstruction Inst(Label, Size);
536 CurFrame->Instructions.push_back(Inst);
539 void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
540 EnsureValidW64UnwindInfo();
542 report_fatal_error("Misaligned saved register offset!");
543 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
544 MCSymbol *Label = getContext().CreateTempSymbol();
545 MCWin64EHInstruction Inst(
546 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
547 Label, Register, Offset);
549 CurFrame->Instructions.push_back(Inst);
552 void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
553 EnsureValidW64UnwindInfo();
555 report_fatal_error("Misaligned saved vector register offset!");
556 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
557 MCSymbol *Label = getContext().CreateTempSymbol();
558 MCWin64EHInstruction Inst(
559 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
560 Label, Register, Offset);
562 CurFrame->Instructions.push_back(Inst);
565 void MCStreamer::EmitWin64EHPushFrame(bool Code) {
566 EnsureValidW64UnwindInfo();
567 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
568 if (CurFrame->Instructions.size() > 0)
569 report_fatal_error("If present, PushMachFrame must be the first UOP");
570 MCSymbol *Label = getContext().CreateTempSymbol();
571 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
573 CurFrame->Instructions.push_back(Inst);
576 void MCStreamer::EmitWin64EHEndProlog() {
577 EnsureValidW64UnwindInfo();
578 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
579 CurFrame->PrologEnd = getContext().CreateTempSymbol();
580 EmitLabel(CurFrame->PrologEnd);
583 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
584 llvm_unreachable("This file format doesn't support this directive");
587 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
588 llvm_unreachable("This file format doesn't support this directive");
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::EmitRawTextImpl(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;
602 EmitRawTextImpl(T.toStringRef(Str));
605 void MCStreamer::EmitW64Tables() {
606 if (!getNumW64UnwindInfos())
609 MCWin64EHUnwindEmitter::Emit(*this);
612 void MCStreamer::Finish() {
613 if (!FrameInfos.empty() && !FrameInfos.back().End)
614 report_fatal_error("Unfinished frame!");
616 MCTargetStreamer *TS = getTargetStreamer();
623 void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
624 Symbol->setVariableValue(Value);
626 MCTargetStreamer *TS = getTargetStreamer();
628 TS->emitAssignment(Symbol, Value);