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) {
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 MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
195 MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
196 if (!Table.getLabel()) {
197 StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
199 Context.GetOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
201 return Table.getLabel();
204 MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
205 if (FrameInfos.empty())
207 return &FrameInfos.back();
210 void MCStreamer::EnsureValidFrame() {
211 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
212 if (!CurFrame || CurFrame->End)
213 report_fatal_error("No open frame");
216 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
217 MCSymbol *EHSymbol) {
220 void MCStreamer::InitSections() {
221 SwitchSection(getContext().getObjectFileInfo()->getTextSection());
224 void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
226 Symbol->setSection(*Section);
228 Symbol->setUndefined();
230 // As we emit symbols into a section, track the order so that they can
231 // be sorted upon later. Zero is reserved to mean 'unemitted'.
232 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
235 void MCStreamer::EmitLabel(MCSymbol *Symbol) {
236 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
237 assert(getCurrentSection().first && "Cannot emit before setting section!");
238 AssignSection(Symbol, getCurrentSection().first);
241 MCTargetStreamer *TS = getTargetStreamer();
243 TS->emitLabel(Symbol);
246 void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
247 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
248 assert(getCurrentSection().first && "Cannot emit before setting section!");
249 AssignSection(Symbol, getCurrentSection().first);
253 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
255 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
256 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
259 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
262 EmitDebugFrame = Debug;
265 void MCStreamer::EmitCFIStartProc(bool IsSimple) {
266 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
267 if (CurFrame && !CurFrame->End)
268 report_fatal_error("Starting a frame before finishing the previous one!");
270 MCDwarfFrameInfo Frame;
271 Frame.IsSimple = IsSimple;
272 EmitCFIStartProcImpl(Frame);
274 FrameInfos.push_back(Frame);
277 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
280 void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
281 // Report an error if we haven't seen a symbol yet where we'd bind
284 report_fatal_error("No symbol to start a frame");
285 Frame.Function = LastSymbol;
286 // We need to create a local symbol to avoid relocations.
287 Frame.Begin = getContext().CreateTempSymbol();
288 EmitLabel(Frame.Begin);
291 void MCStreamer::EmitCFIEndProc() {
293 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
294 EmitCFIEndProcImpl(*CurFrame);
297 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
300 void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
301 Frame.End = getContext().CreateTempSymbol();
302 EmitLabel(Frame.End);
305 MCSymbol *MCStreamer::EmitCFICommon() {
307 MCSymbol *Label = getContext().CreateTempSymbol();
312 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
313 MCSymbol *Label = EmitCFICommon();
314 MCCFIInstruction Instruction =
315 MCCFIInstruction::createDefCfa(Label, Register, Offset);
316 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
317 CurFrame->Instructions.push_back(Instruction);
320 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
321 MCSymbol *Label = EmitCFICommon();
322 MCCFIInstruction Instruction =
323 MCCFIInstruction::createDefCfaOffset(Label, Offset);
324 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
325 CurFrame->Instructions.push_back(Instruction);
328 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
329 MCSymbol *Label = EmitCFICommon();
330 MCCFIInstruction Instruction =
331 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
332 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
333 CurFrame->Instructions.push_back(Instruction);
336 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
337 MCSymbol *Label = EmitCFICommon();
338 MCCFIInstruction Instruction =
339 MCCFIInstruction::createDefCfaRegister(Label, Register);
340 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
341 CurFrame->Instructions.push_back(Instruction);
344 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
345 MCSymbol *Label = EmitCFICommon();
346 MCCFIInstruction Instruction =
347 MCCFIInstruction::createOffset(Label, Register, Offset);
348 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
349 CurFrame->Instructions.push_back(Instruction);
352 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
353 MCSymbol *Label = EmitCFICommon();
354 MCCFIInstruction Instruction =
355 MCCFIInstruction::createRelOffset(Label, Register, Offset);
356 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
357 CurFrame->Instructions.push_back(Instruction);
360 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
363 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
364 CurFrame->Personality = Sym;
365 CurFrame->PersonalityEncoding = Encoding;
368 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
370 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
371 CurFrame->Lsda = Sym;
372 CurFrame->LsdaEncoding = Encoding;
375 void MCStreamer::EmitCFIRememberState() {
376 MCSymbol *Label = EmitCFICommon();
377 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
378 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
379 CurFrame->Instructions.push_back(Instruction);
382 void MCStreamer::EmitCFIRestoreState() {
383 // FIXME: Error if there is no matching cfi_remember_state.
384 MCSymbol *Label = EmitCFICommon();
385 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
386 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
387 CurFrame->Instructions.push_back(Instruction);
390 void MCStreamer::EmitCFISameValue(int64_t Register) {
391 MCSymbol *Label = EmitCFICommon();
392 MCCFIInstruction Instruction =
393 MCCFIInstruction::createSameValue(Label, Register);
394 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
395 CurFrame->Instructions.push_back(Instruction);
398 void MCStreamer::EmitCFIRestore(int64_t Register) {
399 MCSymbol *Label = EmitCFICommon();
400 MCCFIInstruction Instruction =
401 MCCFIInstruction::createRestore(Label, Register);
402 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
403 CurFrame->Instructions.push_back(Instruction);
406 void MCStreamer::EmitCFIEscape(StringRef Values) {
407 MCSymbol *Label = EmitCFICommon();
408 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
409 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
410 CurFrame->Instructions.push_back(Instruction);
413 void MCStreamer::EmitCFISignalFrame() {
415 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
416 CurFrame->IsSignalFrame = true;
419 void MCStreamer::EmitCFIUndefined(int64_t Register) {
420 MCSymbol *Label = EmitCFICommon();
421 MCCFIInstruction Instruction =
422 MCCFIInstruction::createUndefined(Label, Register);
423 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
424 CurFrame->Instructions.push_back(Instruction);
427 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
428 MCSymbol *Label = EmitCFICommon();
429 MCCFIInstruction Instruction =
430 MCCFIInstruction::createRegister(Label, Register1, Register2);
431 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
432 CurFrame->Instructions.push_back(Instruction);
435 void MCStreamer::EmitCFIWindowSave() {
436 MCSymbol *Label = EmitCFICommon();
437 MCCFIInstruction Instruction =
438 MCCFIInstruction::createWindowSave(Label);
439 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
440 CurFrame->Instructions.push_back(Instruction);
443 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
444 W64UnwindInfos.push_back(Frame);
445 CurrentW64UnwindInfo = W64UnwindInfos.back();
448 void MCStreamer::EnsureValidW64UnwindInfo() {
449 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
450 if (!CurFrame || CurFrame->End)
451 report_fatal_error("No open Win64 EH frame function!");
454 void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
455 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
456 if (CurFrame && !CurFrame->End)
457 report_fatal_error("Starting a function before ending the previous one!");
458 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
459 Frame->Begin = getContext().CreateTempSymbol();
460 Frame->Function = Symbol;
461 EmitLabel(Frame->Begin);
462 setCurrentW64UnwindInfo(Frame);
465 void MCStreamer::EmitWin64EHEndProc() {
466 EnsureValidW64UnwindInfo();
467 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
468 if (CurFrame->ChainedParent)
469 report_fatal_error("Not all chained regions terminated!");
470 CurFrame->End = getContext().CreateTempSymbol();
471 EmitLabel(CurFrame->End);
474 void MCStreamer::EmitWin64EHStartChained() {
475 EnsureValidW64UnwindInfo();
476 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
477 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
478 Frame->Begin = getContext().CreateTempSymbol();
479 Frame->Function = CurFrame->Function;
480 Frame->ChainedParent = CurFrame;
481 EmitLabel(Frame->Begin);
482 setCurrentW64UnwindInfo(Frame);
485 void MCStreamer::EmitWin64EHEndChained() {
486 EnsureValidW64UnwindInfo();
487 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
488 if (!CurFrame->ChainedParent)
489 report_fatal_error("End of a chained region outside a chained region!");
490 CurFrame->End = getContext().CreateTempSymbol();
491 EmitLabel(CurFrame->End);
492 CurrentW64UnwindInfo = CurFrame->ChainedParent;
495 void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
497 EnsureValidW64UnwindInfo();
498 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
499 if (CurFrame->ChainedParent)
500 report_fatal_error("Chained unwind areas can't have handlers!");
501 CurFrame->ExceptionHandler = Sym;
502 if (!Except && !Unwind)
503 report_fatal_error("Don't know what kind of handler this is!");
505 CurFrame->HandlesUnwind = true;
507 CurFrame->HandlesExceptions = true;
510 void MCStreamer::EmitWin64EHHandlerData() {
511 EnsureValidW64UnwindInfo();
512 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
513 if (CurFrame->ChainedParent)
514 report_fatal_error("Chained unwind areas can't have handlers!");
517 void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
518 EnsureValidW64UnwindInfo();
519 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
520 MCSymbol *Label = getContext().CreateTempSymbol();
521 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
523 CurFrame->Instructions.push_back(Inst);
526 void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
527 EnsureValidW64UnwindInfo();
528 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
529 if (CurFrame->LastFrameInst >= 0)
530 report_fatal_error("Frame register and offset already specified!");
532 report_fatal_error("Misaligned frame pointer offset!");
533 MCSymbol *Label = getContext().CreateTempSymbol();
534 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
536 CurFrame->LastFrameInst = CurFrame->Instructions.size();
537 CurFrame->Instructions.push_back(Inst);
540 void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
541 EnsureValidW64UnwindInfo();
543 report_fatal_error("Misaligned stack allocation!");
544 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
545 MCSymbol *Label = getContext().CreateTempSymbol();
546 MCWin64EHInstruction Inst(Label, Size);
548 CurFrame->Instructions.push_back(Inst);
551 void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
552 EnsureValidW64UnwindInfo();
554 report_fatal_error("Misaligned saved register offset!");
555 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
556 MCSymbol *Label = getContext().CreateTempSymbol();
557 MCWin64EHInstruction Inst(
558 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
559 Label, Register, Offset);
561 CurFrame->Instructions.push_back(Inst);
564 void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
565 EnsureValidW64UnwindInfo();
567 report_fatal_error("Misaligned saved vector register offset!");
568 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
569 MCSymbol *Label = getContext().CreateTempSymbol();
570 MCWin64EHInstruction Inst(
571 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
572 Label, Register, Offset);
574 CurFrame->Instructions.push_back(Inst);
577 void MCStreamer::EmitWin64EHPushFrame(bool Code) {
578 EnsureValidW64UnwindInfo();
579 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
580 if (CurFrame->Instructions.size() > 0)
581 report_fatal_error("If present, PushMachFrame must be the first UOP");
582 MCSymbol *Label = getContext().CreateTempSymbol();
583 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
585 CurFrame->Instructions.push_back(Inst);
588 void MCStreamer::EmitWin64EHEndProlog() {
589 EnsureValidW64UnwindInfo();
590 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
591 CurFrame->PrologEnd = getContext().CreateTempSymbol();
592 EmitLabel(CurFrame->PrologEnd);
595 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
596 llvm_unreachable("This file format doesn't support this directive");
599 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
600 llvm_unreachable("This file format doesn't support this directive");
603 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
604 /// the specified string in the output .s file. This capability is
605 /// indicated by the hasRawTextSupport() predicate.
606 void MCStreamer::EmitRawTextImpl(StringRef String) {
607 errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
608 " something must not be fully mc'ized\n";
612 void MCStreamer::EmitRawText(const Twine &T) {
613 SmallString<128> Str;
614 EmitRawTextImpl(T.toStringRef(Str));
617 void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
618 if (!getNumFrameInfos())
622 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
625 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
628 void MCStreamer::EmitW64Tables() {
629 if (!getNumW64UnwindInfos())
632 MCWin64EHUnwindEmitter::Emit(*this);
635 void MCStreamer::Finish() {
636 if (!FrameInfos.empty() && !FrameInfos.back().End)
637 report_fatal_error("Unfinished frame!");
639 MCTargetStreamer *TS = getTargetStreamer();
646 MCSymbolData &MCStreamer::getOrCreateSymbolData(const MCSymbol *Symbol) {
647 report_fatal_error("Not supported!");
648 return *(static_cast<MCSymbolData*>(nullptr));
651 void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
652 Symbol->setVariableValue(Value);
654 MCTargetStreamer *TS = getTargetStreamer();
656 TS->emitAssignment(Symbol, Value);