LLVM  10.0.0svn
MCStreamer.cpp
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1 //===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "llvm/MC/MCStreamer.h"
10 #include "llvm/ADT/Optional.h"
11 #include "llvm/ADT/SmallString.h"
12 #include "llvm/ADT/StringRef.h"
13 #include "llvm/ADT/Twine.h"
14 #include "llvm/BinaryFormat/COFF.h"
15 #include "llvm/MC/MCAsmBackend.h"
16 #include "llvm/MC/MCAsmInfo.h"
17 #include "llvm/MC/MCCodeView.h"
18 #include "llvm/MC/MCContext.h"
19 #include "llvm/MC/MCDwarf.h"
20 #include "llvm/MC/MCExpr.h"
21 #include "llvm/MC/MCInst.h"
22 #include "llvm/MC/MCInstPrinter.h"
24 #include "llvm/MC/MCRegister.h"
25 #include "llvm/MC/MCRegisterInfo.h"
26 #include "llvm/MC/MCSection.h"
27 #include "llvm/MC/MCSectionCOFF.h"
28 #include "llvm/MC/MCSymbol.h"
29 #include "llvm/MC/MCWin64EH.h"
30 #include "llvm/MC/MCWinEH.h"
31 #include "llvm/Support/Casting.h"
33 #include "llvm/Support/LEB128.h"
36 #include <cassert>
37 #include <cstdint>
38 #include <cstdlib>
39 #include <utility>
40 
41 using namespace llvm;
42 
44  S.setTargetStreamer(this);
45 }
46 
47 // Pin the vtables to this file.
49 
51 
53 
56  const MCExpr *Subsection,
57  raw_ostream &OS) {
58  Section->PrintSwitchToSection(
61  Subsection);
62 }
63 
65  Streamer.EmitRawText(Directive);
66 }
67 
69  SmallString<128> Str;
70  raw_svector_ostream OS(Str);
71 
72  Value->print(OS, Streamer.getContext().getAsmInfo());
73  Streamer.EmitRawText(OS.str());
74 }
75 
77  const MCAsmInfo *MAI = Streamer.getContext().getAsmInfo();
78  const char *Directive = MAI->getData8bitsDirective();
79  for (const unsigned char C : Data.bytes()) {
80  SmallString<128> Str;
81  raw_svector_ostream OS(Str);
82 
83  OS << Directive << (unsigned)C;
84  Streamer.EmitRawText(OS.str());
85  }
86 }
87 
89 
91  : Context(Ctx), CurrentWinFrameInfo(nullptr),
92  UseAssemblerInfoForParsing(false) {
93  SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
94 }
95 
97 
99  DwarfFrameInfos.clear();
100  CurrentWinFrameInfo = nullptr;
101  WinFrameInfos.clear();
102  SymbolOrdering.clear();
103  SectionStack.clear();
104  SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
105 }
106 
108  // By default, discard comments.
109  return nulls();
110 }
111 
112 unsigned MCStreamer::getNumFrameInfos() { return DwarfFrameInfos.size(); }
114  return DwarfFrameInfos;
115 }
116 
117 void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
118 
121 
123  for (auto &FI : DwarfFrameInfos)
124  FI.CompactUnwindEncoding =
125  (MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0);
126 }
127 
128 /// EmitIntValue - Special case of EmitValue that avoids the client having to
129 /// pass in a MCExpr for constant integers.
130 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
131  assert(1 <= Size && Size <= 8 && "Invalid size");
132  assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
133  "Invalid size");
134  char buf[8];
135  const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
136  for (unsigned i = 0; i != Size; ++i) {
137  unsigned index = isLittleEndian ? i : (Size - i - 1);
138  buf[i] = uint8_t(Value >> (index * 8));
139  }
140  EmitBytes(StringRef(buf, Size));
141 }
142 
143 /// EmitULEB128IntValue - Special case of EmitULEB128Value that avoids the
144 /// client having to pass in a MCExpr for constant integers.
145 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned PadTo) {
146  SmallString<128> Tmp;
147  raw_svector_ostream OSE(Tmp);
148  encodeULEB128(Value, OSE, PadTo);
149  EmitBytes(OSE.str());
150 }
151 
152 /// EmitSLEB128IntValue - Special case of EmitSLEB128Value that avoids the
153 /// client having to pass in a MCExpr for constant integers.
155  SmallString<128> Tmp;
156  raw_svector_ostream OSE(Tmp);
157  encodeSLEB128(Value, OSE);
158  EmitBytes(OSE.str());
159 }
160 
161 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size, SMLoc Loc) {
162  EmitValueImpl(Value, Size, Loc);
163 }
164 
165 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
166  bool IsSectionRelative) {
167  assert((!IsSectionRelative || Size == 4) &&
168  "SectionRelative value requires 4-bytes");
169 
170  if (!IsSectionRelative)
172  else
173  EmitCOFFSecRel32(Sym, /*Offset=*/0);
174 }
175 
177  report_fatal_error("unsupported directive in streamer");
178 }
179 
181  report_fatal_error("unsupported directive in streamer");
182 }
183 
185  report_fatal_error("unsupported directive in streamer");
186 }
187 
189  report_fatal_error("unsupported directive in streamer");
190 }
191 
193  report_fatal_error("unsupported directive in streamer");
194 }
195 
197  report_fatal_error("unsupported directive in streamer");
198 }
199 
200 /// Emit NumBytes bytes worth of the value specified by FillValue.
201 /// This implements directives such as '.space'.
202 void MCStreamer::emitFill(uint64_t NumBytes, uint8_t FillValue) {
203  emitFill(*MCConstantExpr::create(NumBytes, getContext()), FillValue);
204 }
205 
206 /// The implementation in this class just redirects to emitFill.
207 void MCStreamer::EmitZeros(uint64_t NumBytes) {
208  emitFill(NumBytes, 0);
209 }
210 
213  StringRef Filename,
214  Optional<MD5::MD5Result> Checksum,
216  unsigned CUID) {
217  return getContext().getDwarfFile(Directory, Filename, FileNo, Checksum,
218  Source, CUID);
219 }
220 
222  StringRef Filename,
223  Optional<MD5::MD5Result> Checksum,
225  unsigned CUID) {
226  getContext().setMCLineTableRootFile(CUID, Directory, Filename, Checksum,
227  Source);
228 }
229 
231  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
232  if (!CurFrame)
233  return;
234  CurFrame->IsBKeyFrame = true;
235 }
236 
237 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
238  unsigned Column, unsigned Flags,
239  unsigned Isa,
240  unsigned Discriminator,
241  StringRef FileName) {
242  getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
243  Discriminator);
244 }
245 
248  if (!Table.getLabel()) {
250  Table.setLabel(
251  Context.getOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
252  }
253  return Table.getLabel();
254 }
255 
257  return !DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End;
258 }
259 
260 MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
262  getContext().reportError(SMLoc(), "this directive must appear between "
263  ".cfi_startproc and .cfi_endproc "
264  "directives");
265  return nullptr;
266  }
267  return &DwarfFrameInfos.back();
268 }
269 
270 bool MCStreamer::EmitCVFileDirective(unsigned FileNo, StringRef Filename,
271  ArrayRef<uint8_t> Checksum,
272  unsigned ChecksumKind) {
273  return getContext().getCVContext().addFile(*this, FileNo, Filename, Checksum,
274  ChecksumKind);
275 }
276 
277 bool MCStreamer::EmitCVFuncIdDirective(unsigned FunctionId) {
278  return getContext().getCVContext().recordFunctionId(FunctionId);
279 }
280 
282  unsigned IAFunc, unsigned IAFile,
283  unsigned IALine, unsigned IACol,
284  SMLoc Loc) {
285  if (getContext().getCVContext().getCVFunctionInfo(IAFunc) == nullptr) {
286  getContext().reportError(Loc, "parent function id not introduced by "
287  ".cv_func_id or .cv_inline_site_id");
288  return true;
289  }
290 
292  FunctionId, IAFunc, IAFile, IALine, IACol);
293 }
294 
295 void MCStreamer::EmitCVLocDirective(unsigned FunctionId, unsigned FileNo,
296  unsigned Line, unsigned Column,
297  bool PrologueEnd, bool IsStmt,
298  StringRef FileName, SMLoc Loc) {}
299 
300 bool MCStreamer::checkCVLocSection(unsigned FuncId, unsigned FileNo,
301  SMLoc Loc) {
303  MCCVFunctionInfo *FI = CVC.getCVFunctionInfo(FuncId);
304  if (!FI) {
306  Loc, "function id not introduced by .cv_func_id or .cv_inline_site_id");
307  return false;
308  }
309 
310  // Track the section
311  if (FI->Section == nullptr)
313  else if (FI->Section != getCurrentSectionOnly()) {
315  Loc,
316  "all .cv_loc directives for a function must be in the same section");
317  return false;
318  }
319  return true;
320 }
321 
322 void MCStreamer::EmitCVLinetableDirective(unsigned FunctionId,
323  const MCSymbol *Begin,
324  const MCSymbol *End) {}
325 
326 void MCStreamer::EmitCVInlineLinetableDirective(unsigned PrimaryFunctionId,
327  unsigned SourceFileId,
328  unsigned SourceLineNum,
329  const MCSymbol *FnStartSym,
330  const MCSymbol *FnEndSym) {}
331 
332 /// Only call this on endian-specific types like ulittle16_t and little32_t, or
333 /// structs composed of them.
334 template <typename T>
335 static void copyBytesForDefRange(SmallString<20> &BytePrefix,
336  codeview::SymbolKind SymKind,
337  const T &DefRangeHeader) {
338  BytePrefix.resize(2 + sizeof(T));
339  codeview::ulittle16_t SymKindLE = codeview::ulittle16_t(SymKind);
340  memcpy(&BytePrefix[0], &SymKindLE, 2);
341  memcpy(&BytePrefix[2], &DefRangeHeader, sizeof(T));
342 }
343 
345  ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
346  StringRef FixedSizePortion) {}
347 
349  ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
351  SmallString<20> BytePrefix;
352  copyBytesForDefRange(BytePrefix, codeview::S_DEFRANGE_REGISTER_REL, DRHdr);
353  EmitCVDefRangeDirective(Ranges, BytePrefix);
354 }
355 
357  ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
359  SmallString<20> BytePrefix;
360  copyBytesForDefRange(BytePrefix, codeview::S_DEFRANGE_SUBFIELD_REGISTER,
361  DRHdr);
362  EmitCVDefRangeDirective(Ranges, BytePrefix);
363 }
364 
366  ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
368  SmallString<20> BytePrefix;
369  copyBytesForDefRange(BytePrefix, codeview::S_DEFRANGE_REGISTER, DRHdr);
370  EmitCVDefRangeDirective(Ranges, BytePrefix);
371 }
372 
374  ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
376  SmallString<20> BytePrefix;
377  copyBytesForDefRange(BytePrefix, codeview::S_DEFRANGE_FRAMEPOINTER_REL,
378  DRHdr);
379  EmitCVDefRangeDirective(Ranges, BytePrefix);
380 }
381 
383  MCSymbol *EHSymbol) {
384 }
385 
386 void MCStreamer::InitSections(bool NoExecStack) {
387  SwitchSection(getContext().getObjectFileInfo()->getTextSection());
388 }
389 
391  assert(Fragment);
392  Symbol->setFragment(Fragment);
393 
394  // As we emit symbols into a section, track the order so that they can
395  // be sorted upon later. Zero is reserved to mean 'unemitted'.
396  SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
397 }
398 
400  Symbol->redefineIfPossible();
401 
402  if (!Symbol->isUndefined() || Symbol->isVariable())
403  return getContext().reportError(Loc, "invalid symbol redefinition");
404 
405  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
406  assert(getCurrentSectionOnly() && "Cannot emit before setting section!");
407  assert(!Symbol->getFragment() && "Unexpected fragment on symbol data!");
408  assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
409 
410  Symbol->setFragment(&getCurrentSectionOnly()->getDummyFragment());
411 
413  if (TS)
414  TS->emitLabel(Symbol);
415 }
416 
417 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
418  assert(EH || Debug);
419 }
420 
421 void MCStreamer::EmitCFIStartProc(bool IsSimple, SMLoc Loc) {
423  return getContext().reportError(
424  Loc, "starting new .cfi frame before finishing the previous one");
425 
426  MCDwarfFrameInfo Frame;
427  Frame.IsSimple = IsSimple;
428  EmitCFIStartProcImpl(Frame);
429 
430  const MCAsmInfo* MAI = Context.getAsmInfo();
431  if (MAI) {
432  for (const MCCFIInstruction& Inst : MAI->getInitialFrameState()) {
433  if (Inst.getOperation() == MCCFIInstruction::OpDefCfa ||
434  Inst.getOperation() == MCCFIInstruction::OpDefCfaRegister) {
435  Frame.CurrentCfaRegister = Inst.getRegister();
436  }
437  }
438  }
439 
440  DwarfFrameInfos.push_back(Frame);
441 }
442 
444 }
445 
447  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
448  if (!CurFrame)
449  return;
450  EmitCFIEndProcImpl(*CurFrame);
451 }
452 
454  // Put a dummy non-null value in Frame.End to mark that this frame has been
455  // closed.
456  Frame.End = (MCSymbol *)1;
457 }
458 
460  // Return a dummy non-null value so that label fields appear filled in when
461  // generating textual assembly.
462  return (MCSymbol *)1;
463 }
464 
465 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
466  MCSymbol *Label = EmitCFILabel();
468  MCCFIInstruction::createDefCfa(Label, Register, Offset);
469  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
470  if (!CurFrame)
471  return;
472  CurFrame->Instructions.push_back(Instruction);
473  CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
474 }
475 
477  MCSymbol *Label = EmitCFILabel();
480  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
481  if (!CurFrame)
482  return;
483  CurFrame->Instructions.push_back(Instruction);
484 }
485 
486 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
487  MCSymbol *Label = EmitCFILabel();
489  MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
490  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
491  if (!CurFrame)
492  return;
493  CurFrame->Instructions.push_back(Instruction);
494 }
495 
497  MCSymbol *Label = EmitCFILabel();
500  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
501  if (!CurFrame)
502  return;
503  CurFrame->Instructions.push_back(Instruction);
504  CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
505 }
506 
507 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
508  MCSymbol *Label = EmitCFILabel();
510  MCCFIInstruction::createOffset(Label, Register, Offset);
511  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
512  if (!CurFrame)
513  return;
514  CurFrame->Instructions.push_back(Instruction);
515 }
516 
518  MCSymbol *Label = EmitCFILabel();
520  MCCFIInstruction::createRelOffset(Label, Register, Offset);
521  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
522  if (!CurFrame)
523  return;
524  CurFrame->Instructions.push_back(Instruction);
525 }
526 
528  unsigned Encoding) {
529  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
530  if (!CurFrame)
531  return;
532  CurFrame->Personality = Sym;
533  CurFrame->PersonalityEncoding = Encoding;
534 }
535 
536 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
537  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
538  if (!CurFrame)
539  return;
540  CurFrame->Lsda = Sym;
541  CurFrame->LsdaEncoding = Encoding;
542 }
543 
545  MCSymbol *Label = EmitCFILabel();
547  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
548  if (!CurFrame)
549  return;
550  CurFrame->Instructions.push_back(Instruction);
551 }
552 
554  // FIXME: Error if there is no matching cfi_remember_state.
555  MCSymbol *Label = EmitCFILabel();
557  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
558  if (!CurFrame)
559  return;
560  CurFrame->Instructions.push_back(Instruction);
561 }
562 
564  MCSymbol *Label = EmitCFILabel();
566  MCCFIInstruction::createSameValue(Label, Register);
567  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
568  if (!CurFrame)
569  return;
570  CurFrame->Instructions.push_back(Instruction);
571 }
572 
574  MCSymbol *Label = EmitCFILabel();
576  MCCFIInstruction::createRestore(Label, Register);
577  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
578  if (!CurFrame)
579  return;
580  CurFrame->Instructions.push_back(Instruction);
581 }
582 
584  MCSymbol *Label = EmitCFILabel();
586  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
587  if (!CurFrame)
588  return;
589  CurFrame->Instructions.push_back(Instruction);
590 }
591 
593  MCSymbol *Label = EmitCFILabel();
596  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
597  if (!CurFrame)
598  return;
599  CurFrame->Instructions.push_back(Instruction);
600 }
601 
603  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
604  if (!CurFrame)
605  return;
606  CurFrame->IsSignalFrame = true;
607 }
608 
610  MCSymbol *Label = EmitCFILabel();
612  MCCFIInstruction::createUndefined(Label, Register);
613  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
614  if (!CurFrame)
615  return;
616  CurFrame->Instructions.push_back(Instruction);
617 }
618 
619 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
620  MCSymbol *Label = EmitCFILabel();
622  MCCFIInstruction::createRegister(Label, Register1, Register2);
623  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
624  if (!CurFrame)
625  return;
626  CurFrame->Instructions.push_back(Instruction);
627 }
628 
630  MCSymbol *Label = EmitCFILabel();
633  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
634  if (!CurFrame)
635  return;
636  CurFrame->Instructions.push_back(Instruction);
637 }
638 
640  MCSymbol *Label = EmitCFILabel();
642  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
643  if (!CurFrame)
644  return;
645  CurFrame->Instructions.push_back(Instruction);
646 }
647 
649  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
650  if (!CurFrame)
651  return;
652  CurFrame->RAReg = Register;
653 }
654 
656  const MCAsmInfo *MAI = Context.getAsmInfo();
657  if (!MAI->usesWindowsCFI()) {
659  Loc, ".seh_* directives are not supported on this target");
660  return nullptr;
661  }
662  if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End) {
664  Loc, ".seh_ directive must appear within an active frame");
665  return nullptr;
666  }
667  return CurrentWinFrameInfo;
668 }
669 
671  const MCAsmInfo *MAI = Context.getAsmInfo();
672  if (!MAI->usesWindowsCFI())
673  return getContext().reportError(
674  Loc, ".seh_* directives are not supported on this target");
675  if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
677  Loc, "Starting a function before ending the previous one!");
678 
679  MCSymbol *StartProc = EmitCFILabel();
680 
681  WinFrameInfos.emplace_back(
682  std::make_unique<WinEH::FrameInfo>(Symbol, StartProc));
683  CurrentWinFrameInfo = WinFrameInfos.back().get();
684  CurrentWinFrameInfo->TextSection = getCurrentSectionOnly();
685 }
686 
688  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
689  if (!CurFrame)
690  return;
691  if (CurFrame->ChainedParent)
692  getContext().reportError(Loc, "Not all chained regions terminated!");
693 
694  MCSymbol *Label = EmitCFILabel();
695  CurFrame->End = Label;
696 }
697 
699  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
700  if (!CurFrame)
701  return;
702  if (CurFrame->ChainedParent)
703  getContext().reportError(Loc, "Not all chained regions terminated!");
704 
705  MCSymbol *Label = EmitCFILabel();
706  CurFrame->FuncletOrFuncEnd = Label;
707 }
708 
710  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
711  if (!CurFrame)
712  return;
713 
714  MCSymbol *StartProc = EmitCFILabel();
715 
716  WinFrameInfos.emplace_back(std::make_unique<WinEH::FrameInfo>(
717  CurFrame->Function, StartProc, CurFrame));
718  CurrentWinFrameInfo = WinFrameInfos.back().get();
719  CurrentWinFrameInfo->TextSection = getCurrentSectionOnly();
720 }
721 
723  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
724  if (!CurFrame)
725  return;
726  if (!CurFrame->ChainedParent)
727  return getContext().reportError(
728  Loc, "End of a chained region outside a chained region!");
729 
730  MCSymbol *Label = EmitCFILabel();
731 
732  CurFrame->End = Label;
733  CurrentWinFrameInfo = const_cast<WinEH::FrameInfo *>(CurFrame->ChainedParent);
734 }
735 
736 void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except,
737  SMLoc Loc) {
738  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
739  if (!CurFrame)
740  return;
741  if (CurFrame->ChainedParent)
742  return getContext().reportError(
743  Loc, "Chained unwind areas can't have handlers!");
744  CurFrame->ExceptionHandler = Sym;
745  if (!Except && !Unwind)
746  getContext().reportError(Loc, "Don't know what kind of handler this is!");
747  if (Unwind)
748  CurFrame->HandlesUnwind = true;
749  if (Except)
750  CurFrame->HandlesExceptions = true;
751 }
752 
754  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
755  if (!CurFrame)
756  return;
757  if (CurFrame->ChainedParent)
758  getContext().reportError(Loc, "Chained unwind areas can't have handlers!");
759 }
760 
762  const MCSymbolRefExpr *To, uint64_t Count) {
763 }
764 
765 static MCSection *getWinCFISection(MCContext &Context, unsigned *NextWinCFIID,
766  MCSection *MainCFISec,
767  const MCSection *TextSec) {
768  // If this is the main .text section, use the main unwind info section.
769  if (TextSec == Context.getObjectFileInfo()->getTextSection())
770  return MainCFISec;
771 
772  const auto *TextSecCOFF = cast<MCSectionCOFF>(TextSec);
773  auto *MainCFISecCOFF = cast<MCSectionCOFF>(MainCFISec);
774  unsigned UniqueID = TextSecCOFF->getOrAssignWinCFISectionID(NextWinCFIID);
775 
776  // If this section is COMDAT, this unwind section should be COMDAT associative
777  // with its group.
778  const MCSymbol *KeySym = nullptr;
779  if (TextSecCOFF->getCharacteristics() & COFF::IMAGE_SCN_LNK_COMDAT) {
780  KeySym = TextSecCOFF->getCOMDATSymbol();
781 
782  // In a GNU environment, we can't use associative comdats. Instead, do what
783  // GCC does, which is to make plain comdat selectany section named like
784  // ".[px]data$_Z3foov".
785  if (!Context.getAsmInfo()->hasCOFFAssociativeComdats()) {
786  std::string SectionName =
787  (MainCFISecCOFF->getSectionName() + "$" +
788  TextSecCOFF->getSectionName().split('$').second)
789  .str();
790  return Context.getCOFFSection(
791  SectionName,
792  MainCFISecCOFF->getCharacteristics() | COFF::IMAGE_SCN_LNK_COMDAT,
793  MainCFISecCOFF->getKind(), "", COFF::IMAGE_COMDAT_SELECT_ANY);
794  }
795  }
796 
797  return Context.getAssociativeCOFFSection(MainCFISecCOFF, KeySym, UniqueID);
798 }
799 
801  return getWinCFISection(getContext(), &NextWinCFIID,
802  getContext().getObjectFileInfo()->getPDataSection(),
803  TextSec);
804 }
805 
807  return getWinCFISection(getContext(), &NextWinCFIID,
808  getContext().getObjectFileInfo()->getXDataSection(),
809  TextSec);
810 }
811 
813 
814 static unsigned encodeSEHRegNum(MCContext &Ctx, MCRegister Reg) {
815  return Ctx.getRegisterInfo()->getSEHRegNum(Reg);
816 }
817 
819  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
820  if (!CurFrame)
821  return;
822 
823  MCSymbol *Label = EmitCFILabel();
824 
826  Label, encodeSEHRegNum(Context, Register));
827  CurFrame->Instructions.push_back(Inst);
828 }
829 
831  SMLoc Loc) {
832  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
833  if (!CurFrame)
834  return;
835  if (CurFrame->LastFrameInst >= 0)
836  return getContext().reportError(
837  Loc, "frame register and offset can be set at most once");
838  if (Offset & 0x0F)
839  return getContext().reportError(Loc, "offset is not a multiple of 16");
840  if (Offset > 240)
841  return getContext().reportError(
842  Loc, "frame offset must be less than or equal to 240");
843 
844  MCSymbol *Label = EmitCFILabel();
845 
847  Label, encodeSEHRegNum(getContext(), Register), Offset);
848  CurFrame->LastFrameInst = CurFrame->Instructions.size();
849  CurFrame->Instructions.push_back(Inst);
850 }
851 
853  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
854  if (!CurFrame)
855  return;
856  if (Size == 0)
857  return getContext().reportError(Loc,
858  "stack allocation size must be non-zero");
859  if (Size & 7)
860  return getContext().reportError(
861  Loc, "stack allocation size is not a multiple of 8");
862 
863  MCSymbol *Label = EmitCFILabel();
864 
866  CurFrame->Instructions.push_back(Inst);
867 }
868 
870  SMLoc Loc) {
871  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
872  if (!CurFrame)
873  return;
874 
875  if (Offset & 7)
876  return getContext().reportError(
877  Loc, "register save offset is not 8 byte aligned");
878 
879  MCSymbol *Label = EmitCFILabel();
880 
882  Label, encodeSEHRegNum(Context, Register), Offset);
883  CurFrame->Instructions.push_back(Inst);
884 }
885 
887  SMLoc Loc) {
888  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
889  if (!CurFrame)
890  return;
891  if (Offset & 0x0F)
892  return getContext().reportError(Loc, "offset is not a multiple of 16");
893 
894  MCSymbol *Label = EmitCFILabel();
895 
897  Label, encodeSEHRegNum(Context, Register), Offset);
898  CurFrame->Instructions.push_back(Inst);
899 }
900 
902  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
903  if (!CurFrame)
904  return;
905  if (!CurFrame->Instructions.empty())
906  return getContext().reportError(
907  Loc, "If present, PushMachFrame must be the first UOP");
908 
909  MCSymbol *Label = EmitCFILabel();
910 
912  CurFrame->Instructions.push_back(Inst);
913 }
914 
916  WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
917  if (!CurFrame)
918  return;
919 
920  MCSymbol *Label = EmitCFILabel();
921 
922  CurFrame->PrologEnd = Label;
923 }
924 
926 
928 
930 
932 
934 
935 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
936 /// the specified string in the output .s file. This capability is
937 /// indicated by the hasRawTextSupport() predicate.
939  // This is not llvm_unreachable for the sake of out of tree backend
940  // developers who may not have assembly streamers and should serve as a
941  // reminder to not accidentally call EmitRawText in the absence of such.
942  report_fatal_error("EmitRawText called on an MCStreamer that doesn't support "
943  "it (target backend is likely missing an AsmStreamer "
944  "implementation)");
945 }
946 
948  SmallString<128> Str;
950 }
951 
953 }
954 
956  if ((!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End) ||
957  (!WinFrameInfos.empty() && !WinFrameInfos.back()->End)) {
958  getContext().reportError(SMLoc(), "Unfinished frame!");
959  return;
960  }
961 
963  if (TS)
964  TS->finish();
965 
966  FinishImpl();
967 }
968 
970  visitUsedExpr(*Value);
971  Symbol->setVariableValue(Value);
972 
974  if (TS)
975  TS->emitAssignment(Symbol, Value);
976 }
977 
979  raw_ostream &OS, const MCInst &Inst,
980  const MCSubtargetInfo &STI) {
981  InstPrinter.printInst(&Inst, OS, "", STI);
982 }
983 
985 }
986 
988  switch (Expr.getKind()) {
989  case MCExpr::Target:
990  cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
991  break;
992 
993  case MCExpr::Constant:
994  break;
995 
996  case MCExpr::Binary: {
997  const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
998  visitUsedExpr(*BE.getLHS());
999  visitUsedExpr(*BE.getRHS());
1000  break;
1001  }
1002 
1003  case MCExpr::SymbolRef:
1004  visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
1005  break;
1006 
1007  case MCExpr::Unary:
1008  visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
1009  break;
1010  }
1011 }
1012 
1014  // Scan for values.
1015  for (unsigned i = Inst.getNumOperands(); i--;)
1016  if (Inst.getOperand(i).isExpr())
1017  visitUsedExpr(*Inst.getOperand(i).getExpr());
1018 }
1019 
1021  unsigned Size) {
1022  // Get the Hi-Lo expression.
1023  const MCExpr *Diff =
1025  MCSymbolRefExpr::create(Lo, Context), Context);
1026 
1027  const MCAsmInfo *MAI = Context.getAsmInfo();
1028  if (!MAI->doesSetDirectiveSuppressReloc()) {
1029  EmitValue(Diff, Size);
1030  return;
1031  }
1032 
1033  // Otherwise, emit with .set (aka assignment).
1034  MCSymbol *SetLabel = Context.createTempSymbol("set", true);
1035  EmitAssignment(SetLabel, Diff);
1036  EmitSymbolValue(SetLabel, Size);
1037 }
1038 
1040  const MCSymbol *Lo) {
1041  // Get the Hi-Lo expression.
1042  const MCExpr *Diff =
1044  MCSymbolRefExpr::create(Lo, Context), Context);
1045 
1046  EmitULEB128Value(Diff);
1047 }
1048 
1051 void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
1053  llvm_unreachable("this directive only supported on COFF targets");
1054 }
1056  llvm_unreachable("this directive only supported on COFF targets");
1057 }
1060  llvm_unreachable("this directive only supported on COFF targets");
1061 }
1063  llvm_unreachable("this directive only supported on COFF targets");
1064 }
1066  unsigned ByteAlign) {
1067  llvm_unreachable("this directive only supported on XCOFF targets");
1068 }
1071  const MCSymbol *Aliasee) {}
1073  unsigned ByteAlignment) {}
1075  uint64_t Size, unsigned ByteAlignment) {}
1080 void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) {
1081  visitUsedExpr(*Value);
1082 }
1085 void MCStreamer::emitFill(const MCExpr &NumBytes, uint64_t Value, SMLoc Loc) {}
1086 void MCStreamer::emitFill(const MCExpr &NumValues, int64_t Size, int64_t Expr,
1087  SMLoc Loc) {}
1089  unsigned ValueSize,
1090  unsigned MaxBytesToEmit) {}
1092  unsigned MaxBytesToEmit) {}
1094  SMLoc Loc) {}
1095 void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
1096 void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
1099 
1101  assert(Section && "Cannot switch to a null section!");
1102  MCSectionSubPair curSection = SectionStack.back().first;
1103  SectionStack.back().second = curSection;
1104  if (MCSectionSubPair(Section, Subsection) != curSection) {
1105  ChangeSection(Section, Subsection);
1106  SectionStack.back().first = MCSectionSubPair(Section, Subsection);
1107  assert(!Section->hasEnded() && "Section already ended");
1108  MCSymbol *Sym = Section->getBeginSymbol();
1109  if (Sym && !Sym->isInSection())
1110  EmitLabel(Sym);
1111  }
1112 }
1113 
1115  // TODO: keep track of the last subsection so that this symbol appears in the
1116  // correct place.
1117  MCSymbol *Sym = Section->getEndSymbol(Context);
1118  if (Sym->isInSection())
1119  return Sym;
1120 
1121  SwitchSection(Section);
1122  EmitLabel(Sym);
1123  return Sym;
1124 }
1125 
1127  const VersionTuple &SDKVersion) {
1128  if (!Target.isOSBinFormatMachO() || !Target.isOSDarwin())
1129  return;
1130  // Do we even know the version?
1131  if (Target.getOSMajorVersion() == 0)
1132  return;
1133 
1134  unsigned Major;
1135  unsigned Minor;
1136  unsigned Update;
1137  if (Target.isMacCatalystEnvironment()) {
1138  // Mac Catalyst always uses the build version load command.
1139  Target.getiOSVersion(Major, Minor, Update);
1140  assert(Major && "A non-zero major version is expected");
1141  EmitBuildVersion(MachO::PLATFORM_MACCATALYST, Major, Minor, Update,
1142  SDKVersion);
1143  return;
1144  }
1145 
1146  MCVersionMinType VersionType;
1147  if (Target.isWatchOS()) {
1148  VersionType = MCVM_WatchOSVersionMin;
1149  Target.getWatchOSVersion(Major, Minor, Update);
1150  } else if (Target.isTvOS()) {
1151  VersionType = MCVM_TvOSVersionMin;
1152  Target.getiOSVersion(Major, Minor, Update);
1153  } else if (Target.isMacOSX()) {
1154  VersionType = MCVM_OSXVersionMin;
1155  if (!Target.getMacOSXVersion(Major, Minor, Update))
1156  Major = 0;
1157  } else {
1158  VersionType = MCVM_IOSVersionMin;
1159  Target.getiOSVersion(Major, Minor, Update);
1160  }
1161  if (Major != 0)
1162  EmitVersionMin(VersionType, Major, Minor, Update, SDKVersion);
1163 }
virtual void EmitBundleUnlock()
Ends a bundle-locked group.
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag)
Note in the output the specified Flag.
const MCAsmInfo * getAsmInfo() const
Definition: MCContext.h:318
virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line, unsigned Column, unsigned Flags, unsigned Isa, unsigned Discriminator, StringRef FileName)
This implements the DWARF2 &#39;.loc fileno lineno ...&#39; assembler directive.
Definition: MCStreamer.cpp:237
uint64_t CallInst * C
virtual void EmitBundleAlignMode(unsigned AlignPow2)
Set the bundle alignment mode from now on in the section.
bool isOSDarwin() const
isOSDarwin - Is this a "Darwin" OS (OS X, iOS, or watchOS).
Definition: Triple.h:481
Profile::FuncID FuncId
Definition: Profile.cpp:321
Instances of this class represent a uniqued identifier for a section in the current translation unit...
Definition: MCSection.h:39
bool doesSetDirectiveSuppressReloc() const
Definition: MCAsmInfo.h:538
void getiOSVersion(unsigned &Major, unsigned &Minor, unsigned &Micro) const
getiOSVersion - Parse the version number as with getOSVersion.
Definition: Triple.cpp:1114
MCStreamer(MCContext &Ctx)
Definition: MCStreamer.cpp:90
bool usesWindowsCFI() const
Definition: MCAsmInfo.h:598
virtual void EmitCFISameValue(int64_t Register)
Definition: MCStreamer.cpp:563
virtual void EmitCVDefRangeDirective(ArrayRef< std::pair< const MCSymbol *, const MCSymbol *>> Ranges, StringRef FixedSizePortion)
This implements the CodeView &#39;.cv_def_range&#39; assembler directive.
Definition: MCStreamer.cpp:344
virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding)
Definition: MCStreamer.cpp:527
virtual void EmitSLEB128Value(const MCExpr *Value)
virtual void EmitCFIGnuArgsSize(int64_t Size)
Definition: MCStreamer.cpp:592
LLVMContext & Context
Wrapper class representing physical registers. Should be passed by value.
Definition: MCRegister.h:22
void EmitRawText(const Twine &String)
If this file is backed by a assembly streamer, this dumps the specified string in the output ...
Definition: MCStreamer.cpp:947
static const MCSymbolRefExpr * create(const MCSymbol *Symbol, MCContext &Ctx)
Definition: MCExpr.h:327
void EmitSLEB128IntValue(int64_t Value)
Special case of EmitSLEB128Value that avoids the client having to pass in a MCExpr for constant integ...
Definition: MCStreamer.cpp:154
LLVM_ATTRIBUTE_NORETURN void report_fatal_error(Error Err, bool gen_crash_diag=true)
Report a serious error, calling any installed error handler.
Definition: Error.cpp:139
This class represents lattice values for constants.
Definition: AllocatorList.h:23
bool isVariable() const
isVariable - Check if this is a variable symbol.
Definition: MCSymbol.h:297
void EmitSymbolValue(const MCSymbol *Sym, unsigned Size, bool IsSectionRelative=false)
Special case of EmitValue that avoids the client having to pass in a MCExpr for MCSymbols.
Definition: MCStreamer.cpp:165
bool isMacOSX() const
isMacOSX - Is this a Mac OS X triple.
Definition: Triple.h:453
virtual void emitValueToOffset(const MCExpr *Offset, unsigned char Value, SMLoc Loc)
Emit some number of copies of Value until the byte offset Offset is reached.
virtual void emitELFSymverDirective(StringRef AliasName, const MCSymbol *Aliasee)
Emit an ELF .symver directive.
virtual void printInst(const MCInst *MI, raw_ostream &OS, StringRef Annot, const MCSubtargetInfo &STI)=0
Print the specified MCInst to the specified raw_ostream.
virtual void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment=0)
Emit a thread local bss (.tbss) symbol.
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
void redefineIfPossible()
Prepare this symbol to be redefined.
Definition: MCSymbol.h:231
virtual void EmitWinCFIStartProc(const MCSymbol *Symbol, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:670
virtual void EndCOFFSymbolDef()
Marks the end of the symbol definition.
virtual void EmitBuildVersion(unsigned Platform, unsigned Major, unsigned Minor, unsigned Update, VersionTuple SDKVersion)
Emit/Specify Mach-O build version command.
Definition: MCStreamer.h:460
MCSection * Section
The section of the first .cv_loc directive used for this function, or null if none has been seen yet...
Definition: MCCodeView.h:111
const MCSymbol * End
Definition: MCWinEH.h:33
.watchos_version_min
Definition: MCDirectives.h:68
virtual void EmitULEB128Value(const MCExpr *Value)
static MCCFIInstruction createRememberState(MCSymbol *L)
.cfi_remember_state Save all current rules for all registers.
Definition: MCDwarf.h:557
virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol)
Emit an weak reference from Alias to Symbol.
void push_back(const T &Elt)
Definition: SmallVector.h:211
static WinEH::Instruction SaveNonVol(MCSymbol *L, unsigned Reg, unsigned Offset)
Definition: MCWin64EH.h:36
virtual void EmitBytes(StringRef Data)
Emit the bytes in Data into the output.
static MCCFIInstruction createOffset(MCSymbol *L, unsigned Register, int Offset)
.cfi_offset Previous value of Register is saved at offset Offset from CFA.
Definition: MCDwarf.h:507
Target specific streamer interface.
Definition: MCStreamer.h:85
StringRef toStringRef(SmallVectorImpl< char > &Out) const
This returns the twine as a single StringRef if it can be represented as such.
Definition: Twine.h:455
unsigned Reg
.ios_version_min
Definition: MCDirectives.h:65
virtual void reset()
State management.
Definition: MCStreamer.cpp:98
unsigned CurrentCfaRegister
Definition: MCDwarf.h:614
virtual void EmitWindowsUnwindTables()
Definition: MCStreamer.cpp:952
virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol)
Start emitting COFF symbol definition.
virtual Expected< unsigned > tryEmitDwarfFileDirective(unsigned FileNo, StringRef Directory, StringRef Filename, Optional< MD5::MD5Result > Checksum=None, Optional< StringRef > Source=None, unsigned CUID=0)
Associate a filename with a specified logical file number.
Definition: MCStreamer.cpp:212
virtual void EmitDTPRel64Value(const MCExpr *Value)
Emit the expression Value into the output as a dtprel (64-bit DTP relative) value.
Definition: MCStreamer.cpp:176
bool isWatchOS() const
Is this an Apple watchOS triple.
Definition: Triple.h:472
const MCExpr * getLHS() const
Get the left-hand side expression of the binary operator.
Definition: MCExpr.h:568
A raw_ostream that writes to an SmallVector or SmallString.
Definition: raw_ostream.h:530
virtual void EmitCFIRegister(int64_t Register1, int64_t Register2)
Definition: MCStreamer.cpp:619
virtual void emitExplicitComments()
Emit added explicit comments.
Definition: MCStreamer.cpp:120
virtual void emitValue(const MCExpr *Value)
Definition: MCStreamer.cpp:68
.macosx_version_min
Definition: MCDirectives.h:66
virtual void emitAbsoluteSymbolDiffAsULEB128(const MCSymbol *Hi, const MCSymbol *Lo)
Emit the absolute difference between two symbols encoded with ULEB128.
detail::packed_endian_specific_integral< uint16_t, little, unaligned > ulittle16_t
Definition: Endian.h:272
virtual void EmitCFIDefCfaOffset(int64_t Offset)
Definition: MCStreamer.cpp:476
virtual MCSymbol * getDwarfLineTableSymbol(unsigned CUID)
Definition: MCStreamer.cpp:246
StringRef getPrivateGlobalPrefix() const
Definition: MCAsmInfo.h:501
static MCCFIInstruction createDefCfaOffset(MCSymbol *L, int Offset)
.cfi_def_cfa_offset modifies a rule for computing CFA.
Definition: MCDwarf.h:494
COFF::SymbolStorageClass StorageClass
Definition: COFFYAML.cpp:356
virtual void EmitCOFFSymbolStorageClass(int StorageClass)
Emit the storage class of the symbol.
std::vector< Instruction > Instructions
Definition: MCWinEH.h:46
virtual void EmitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc=SMLoc())
Emit the expression Value into the output as a native integer of the given Size bytes.
unsigned LsdaEncoding
Definition: MCDwarf.h:616
virtual void EmitCOFFImgRel32(MCSymbol const *Symbol, int64_t Offset)
Emits a COFF image relative relocation.
Definition: MCStreamer.cpp:933
static MCCFIInstruction createAdjustCfaOffset(MCSymbol *L, int Adjustment)
.cfi_adjust_cfa_offset Same as .cfi_def_cfa_offset, but Offset is a relative value that is added/subt...
Definition: MCDwarf.h:501
virtual void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI)
Emit the given Instruction into the current section.
bool addFile(MCStreamer &OS, unsigned FileNumber, StringRef Filename, ArrayRef< uint8_t > ChecksumBytes, uint8_t ChecksumKind)
Definition: MCCodeView.cpp:46
MCSectionCOFF * getCOFFSection(StringRef Section, unsigned Characteristics, SectionKind Kind, StringRef COMDATSymName, int Selection, unsigned UniqueID=GenericSectionID, const char *BeginSymName=nullptr)
Definition: MCContext.cpp:434
virtual void addExplicitComment(const Twine &T)
Add explicit comment T.
Definition: MCStreamer.cpp:119
virtual void EmitCFISections(bool EH, bool Debug)
Definition: MCStreamer.cpp:417
virtual void EmitGPRel32Value(const MCExpr *Value)
Emit the expression Value into the output as a gprel32 (32-bit GP relative) value.
Definition: MCStreamer.cpp:196
MCSectionCOFF * getAssociativeCOFFSection(MCSectionCOFF *Sec, const MCSymbol *KeySym, unsigned UniqueID=GenericSectionID)
Gets or creates a section equivalent to Sec that is associated with the section containing KeySym...
Definition: MCContext.cpp:474
std::vector< MCCFIInstruction > Instructions
Definition: MCDwarf.h:613
static MCCFIInstruction createUndefined(MCSymbol *L, unsigned Register)
.cfi_undefined From now on the previous value of Register can&#39;t be restored anymore.
Definition: MCDwarf.h:546
virtual void EmitCFIRememberState()
Definition: MCStreamer.cpp:544
MCContext & getContext() const
Definition: MCStreamer.h:252
unsigned getNumFrameInfos()
Definition: MCStreamer.cpp:112
virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding)
Definition: MCStreamer.cpp:536
static unsigned encodeSEHRegNum(MCContext &Ctx, MCRegister Reg)
Definition: MCStreamer.cpp:814
virtual void EmitGPRel64Value(const MCExpr *Value)
Emit the expression Value into the output as a gprel64 (64-bit GP relative) value.
Definition: MCStreamer.cpp:192
void AssignFragment(MCSymbol *Symbol, MCFragment *Fragment)
Sets the symbol&#39;s section.
Definition: MCStreamer.cpp:390
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:80
virtual void EmitWinCFIEndProc(SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:687
virtual void EmitCFIEscape(StringRef Values)
Definition: MCStreamer.cpp:583
bool isMacCatalystEnvironment() const
Definition: Triple.h:489
virtual void EmitCOFFSymbolType(int Type)
Emit the type of the symbol.
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
bool isInSection() const
isInSection - Check if this symbol is defined in some section (i.e., it is defined but not absolute)...
Definition: MCSymbol.h:253
virtual void EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:736
Represent a reference to a symbol from inside an expression.
Definition: MCExpr.h:169
const MCSymbol * Lsda
Definition: MCDwarf.h:612
void setFragment(MCFragment *F) const
Mark the symbol as defined in the fragment F.
Definition: MCSymbol.h:274
iterator_range< const unsigned char * > bytes() const
Definition: StringRef.h:125
virtual uint32_t generateCompactUnwindEncoding(ArrayRef< MCCFIInstruction >) const
Generate the compact unwind encoding for the CFI instructions.
Definition: MCAsmBackend.h:179
Tagged union holding either a T or a Error.
Definition: yaml2obj.h:21
virtual void EmitWinCFISetFrame(MCRegister Register, unsigned Offset, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:830
virtual void emitLabel(MCSymbol *Symbol)
Definition: MCStreamer.cpp:50
virtual void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame)
Definition: MCStreamer.cpp:443
virtual ~MCStreamer()
Definition: MCStreamer.cpp:96
MCDwarfLineTable & getMCDwarfLineTable(unsigned CUID)
Definition: MCContext.h:558
MCSymbol * getEndSymbol(MCContext &Ctx)
Definition: MCSection.cpp:28
virtual void EmitCVLocDirective(unsigned FunctionId, unsigned FileNo, unsigned Line, unsigned Column, bool PrologueEnd, bool IsStmt, StringRef FileName, SMLoc Loc)
This implements the CodeView &#39;.cv_loc&#39; assembler directive.
Definition: MCStreamer.cpp:295
virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value)
Emit an assignment of Value to Symbol.
Definition: MCStreamer.cpp:969
virtual void EmitWinCFIStartChained(SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:709
Context object for machine code objects.
Definition: MCContext.h:65
Expected< unsigned > getDwarfFile(StringRef Directory, StringRef FileName, unsigned FileNumber, Optional< MD5::MD5Result > Checksum, Optional< StringRef > Source, unsigned CUID)
Creates an entry in the dwarf file and directory tables.
Definition: MCContext.cpp:647
virtual bool EmitCVFileDirective(unsigned FileNo, StringRef Filename, ArrayRef< uint8_t > Checksum, unsigned ChecksumKind)
Associate a filename with a specified logical file number, and also specify that file&#39;s checksum info...
Definition: MCStreamer.cpp:270
static WinEH::Instruction PushNonVol(MCSymbol *L, unsigned Reg)
Definition: MCWin64EH.h:26
bool hasEnded() const
Definition: MCSection.cpp:34
static const MCBinaryExpr * createSub(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:550
virtual void finish()
Definition: MCStreamer.cpp:52
const MCExpr * getRHS() const
Get the right-hand side expression of the binary operator.
Definition: MCExpr.h:571
virtual void EmitWinCFISaveXMM(MCRegister Register, unsigned Offset, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:886
virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &CurFrame)
Definition: MCStreamer.cpp:453
ArrayRef< MCDwarfFrameInfo > getDwarfFrameInfos() const
Definition: MCStreamer.cpp:113
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:32
virtual void EmitTPRel64Value(const MCExpr *Value)
Emit the expression Value into the output as a tprel (64-bit TP relative) value.
Definition: MCStreamer.cpp:184
virtual void EmitWinCFISaveReg(MCRegister Register, unsigned Offset, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:869
virtual void emitRawComment(const Twine &T, bool TabPrefix=true)
Print T and prefix it with the comment string (normally #) and optionally a tab.
Definition: MCStreamer.cpp:117
virtual void EmitBinaryData(StringRef Data)
Functionally identical to EmitBytes.
const MCExpr * getExpr() const
Definition: MCInst.h:95
virtual void EmitCFIRestoreState()
Definition: MCStreamer.cpp:553
virtual void EmitIntValue(uint64_t Value, unsigned Size)
Special case of EmitValue that avoids the client having to pass in a MCExpr for constant integers...
Definition: MCStreamer.cpp:130
void EmitValue(const MCExpr *Value, unsigned Size, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:161
Unary expressions.
Definition: MCExpr.h:41
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:158
static const MCConstantExpr * create(int64_t Value, MCContext &Ctx, bool PrintInHex=false)
Definition: MCExpr.cpp:169
virtual void EmitCFIRestore(int64_t Register)
Definition: MCStreamer.cpp:573
const char * getData8bitsDirective() const
Definition: MCAsmInfo.h:418
Flag
These should be considered private to the implementation of the MCInstrDesc class.
Definition: MCInstrDesc.h:131
This class is intended to be used as a base class for asm properties and features specific to the tar...
Definition: MCAsmInfo.h:56
virtual void EmitBundleLock(bool AlignToEnd)
The following instructions are a bundle-locked group.
virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment)
Emit a local common (.lcomm) symbol.
static MCCFIInstruction createSameValue(MCSymbol *L, unsigned Register)
.cfi_same_value Current value of Register is the same as in the previous frame.
Definition: MCDwarf.h:552
virtual raw_ostream & GetCommentOS()
Return a raw_ostream that comments can be written to.
Definition: MCStreamer.cpp:107
void EmitZeros(uint64_t NumBytes)
Emit NumBytes worth of zeros.
Definition: MCStreamer.cpp:207
static MCCFIInstruction createNegateRAState(MCSymbol *L)
.cfi_negate_ra_state AArch64 negate RA state.
Definition: MCDwarf.h:533
Streaming machine code generation interface.
Definition: MCStreamer.h:190
virtual void EmitWinCFIFuncletOrFuncEnd(SMLoc Loc=SMLoc())
This is used on platforms, such as Windows on ARM64, that require function or funclet sizes to be emi...
Definition: MCStreamer.cpp:698
MCSymbol * createTempSymbol(bool CanBeUnnamed=true)
Create and return a new assembler temporary symbol with a unique but unspecified name.
Definition: MCContext.cpp:225
void print(raw_ostream &OS, const MCAsmInfo *MAI, bool InParens=false) const
Definition: MCExpr.cpp:42
const FrameInfo * ChainedParent
Definition: MCWinEH.h:45
MCTargetStreamer * getTargetStreamer()
Definition: MCStreamer.h:259
static MCCFIInstruction createDefCfa(MCSymbol *L, unsigned Register, int Offset)
.cfi_def_cfa defines a rule for computing CFA as: take address from Register and add Offset to it...
Definition: MCDwarf.h:480
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:45
virtual void EmitCVLinetableDirective(unsigned FunctionId, const MCSymbol *FnStart, const MCSymbol *FnEnd)
This implements the CodeView &#39;.cv_linetable&#39; assembler directive.
Definition: MCStreamer.cpp:322
.tvos_version_min
Definition: MCDirectives.h:67
static MCCFIInstruction createDefCfaRegister(MCSymbol *L, unsigned Register)
.cfi_def_cfa_register modifies a rule for computing CFA.
Definition: MCDwarf.h:487
virtual void EmitWinCFIPushReg(MCRegister Register, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:818
static MCCFIInstruction createWindowSave(MCSymbol *L)
.cfi_window_save SPARC register window is saved.
Definition: MCDwarf.h:528
virtual void SwitchSection(MCSection *Section, const MCExpr *Subsection=nullptr)
Set the current section where code is being emitted to Section.
static MCCFIInstruction createGnuArgsSize(MCSymbol *L, int Size)
A special wrapper for .cfi_escape that indicates GNU_ARGS_SIZE.
Definition: MCDwarf.h:573
static WinEH::Instruction PushMachFrame(MCSymbol *L, bool Code)
Definition: MCWin64EH.h:33
MCSection * getAssociatedPDataSection(const MCSection *TextSec)
Get the .pdata section used for the given section.
Definition: MCStreamer.cpp:800
virtual void EmitSyntaxDirective()
Definition: MCStreamer.cpp:812
virtual void EmitXCOFFLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment)
Emits an lcomm directive with XCOFF csect information.
virtual void EmitCFIDefCfaRegister(int64_t Register)
Definition: MCStreamer.cpp:496
virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value=0, unsigned ValueSize=1, unsigned MaxBytesToEmit=0)
Emit some number of copies of Value until the byte alignment ByteAlignment is reached.
int getSEHRegNum(MCRegister RegNum) const
Map a target register to an equivalent SEH register number.
void getWatchOSVersion(unsigned &Major, unsigned &Minor, unsigned &Micro) const
getWatchOSVersion - Parse the version number as with getOSVersion.
Definition: Triple.cpp:1140
const MCObjectFileInfo * getObjectFileInfo() const
Definition: MCContext.h:322
void reportError(SMLoc L, const Twine &Msg)
Definition: MCContext.cpp:687
static MCCFIInstruction createRelOffset(MCSymbol *L, unsigned Register, int Offset)
.cfi_rel_offset Previous value of Register is saved at offset Offset from the current CFA register...
Definition: MCDwarf.h:515
bool isExpr() const
Definition: MCInst.h:60
static MCCFIInstruction createRestore(MCSymbol *L, unsigned Register)
.cfi_restore says that the rule for Register is now the same as it was at the beginning of the functi...
Definition: MCDwarf.h:540
virtual void EmitRawTextImpl(StringRef String)
EmitRawText - If this file is backed by an assembly streamer, this dumps the specified string in the ...
Definition: MCStreamer.cpp:938
virtual void EmitWinEHHandlerData(SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:753
unsigned getNumOperands() const
Definition: MCInst.h:181
unsigned size() const
Definition: DenseMap.h:99
virtual void EmitCFIUndefined(int64_t Register)
Definition: MCStreamer.cpp:609
virtual void EmitCFINegateRAState()
Definition: MCStreamer.cpp:639
unsigned PersonalityEncoding
Definition: MCDwarf.h:615
bool isOSBinFormatMachO() const
Tests whether the environment is MachO.
Definition: Triple.h:633
static WinEH::Instruction SetFPReg(MCSymbol *L, unsigned Reg, unsigned Off)
Definition: MCWin64EH.h:48
void Finish()
Finish emission of machine code.
Definition: MCStreamer.cpp:955
virtual void EmitEHSymAttributes(const MCSymbol *Symbol, MCSymbol *EHSymbol)
Definition: MCStreamer.cpp:382
virtual void EmitWinCFIEndChained(SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:722
bool isIntN(unsigned N, int64_t x)
Checks if an signed integer fits into the given (dynamic) bit width.
Definition: MathExtras.h:397
static MCCFIInstruction createRestoreState(MCSymbol *L)
.cfi_restore_state Restore the previously saved state.
Definition: MCDwarf.h:562
Binary assembler expressions.
Definition: MCExpr.h:421
virtual void emitDwarfFile0Directive(StringRef Directory, StringRef Filename, Optional< MD5::MD5Result > Checksum, Optional< StringRef > Source, unsigned CUID=0)
Specify the "root" file of the compilation, using the ".file 0" extension.
Definition: MCStreamer.cpp:221
virtual void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T, raw_ostream &OS, const MCExpr *Subsection) const =0
unsigned getOSMajorVersion() const
getOSMajorVersion - Return just the major version number, this is specialized because it is a common ...
Definition: Triple.h:338
virtual void EmitCOFFSafeSEH(MCSymbol const *Symbol)
Definition: MCStreamer.cpp:925
void generateCompactUnwindEncodings(MCAsmBackend *MAB)
Definition: MCStreamer.cpp:122
MCCVFunctionInfo * getCVFunctionInfo(unsigned FuncId)
Retreive the function info if this is a valid function id, or nullptr.
Definition: MCCodeView.cpp:78
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:43
static MCSection * getWinCFISection(MCContext &Context, unsigned *NextWinCFIID, MCSection *MainCFISec, const MCSection *TextSec)
Definition: MCStreamer.cpp:765
virtual void EmitWinCFIPushFrame(bool Code, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:901
static void copyBytesForDefRange(SmallString< 20 > &BytePrefix, codeview::SymbolKind SymKind, const T &DefRangeHeader)
Only call this on endian-specific types like ulittle16_t and little32_t, or structs composed of them...
Definition: MCStreamer.cpp:335
const std::vector< MCCFIInstruction > & getInitialFrameState() const
Definition: MCAsmInfo.h:617
static WinEH::Instruction SaveXMM(MCSymbol *L, unsigned Reg, unsigned Offset)
Definition: MCWin64EH.h:42
virtual void EmitTPRel32Value(const MCExpr *Value)
Emit the expression Value into the output as a tprel (32-bit TP relative) value.
Definition: MCStreamer.cpp:188
const MCSymbol * PrologEnd
Definition: MCWinEH.h:37
virtual void InitSections(bool NoExecStack)
Create the default sections and set the initial one.
Definition: MCStreamer.cpp:386
virtual void EmitCFIReturnColumn(int64_t Register)
Definition: MCStreamer.cpp:648
std::pair< MCSection *, const MCExpr * > MCSectionSubPair
Definition: MCStreamer.h:58
BlockVerifier::State From
bool getMacOSXVersion(unsigned &Major, unsigned &Minor, unsigned &Micro) const
getMacOSXVersion - Parse the version number as with getOSVersion and then translate generic "darwin" ...
Definition: Triple.cpp:1073
virtual void emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo, unsigned Size)
Emit the absolute difference between two symbols.
virtual void EmitCOFFSymbolIndex(MCSymbol const *Symbol)
Emits the symbol table index of a Symbol into the current section.
Definition: MCStreamer.cpp:927
unsigned encodeULEB128(uint64_t Value, raw_ostream &OS, unsigned PadTo=0)
Utility function to encode a ULEB128 value to an output stream.
Definition: LEB128.h:80
ExprKind getKind() const
Definition: MCExpr.h:68
virtual void EmitCFIOffset(int64_t Register, int64_t Offset)
Definition: MCStreamer.cpp:507
bool isUndefined(bool SetUsed=true) const
isUndefined - Check if this symbol undefined (i.e., implicitly defined).
Definition: MCSymbol.h:258
MCFragment * getFragment(bool SetUsed=true) const
Definition: MCSymbol.h:396
unsigned encodeSLEB128(int64_t Value, raw_ostream &OS, unsigned PadTo=0)
Utility function to encode a SLEB128 value to an output stream.
Definition: LEB128.h:23
const MCSection * TextSection
Definition: MCWinEH.h:39
virtual void EmitWinCFIEndProlog(SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:915
static WinEH::Instruction Alloc(MCSymbol *L, unsigned Size)
Definition: MCWin64EH.h:29
virtual void EmitCodeAlignment(unsigned ByteAlignment, unsigned MaxBytesToEmit=0)
Emit nops until the byte alignment ByteAlignment is reached.
const MCOperand & getOperand(unsigned i) const
Definition: MCInst.h:179
virtual void EmitWinCFIAllocStack(unsigned Size, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:852
virtual void EmitVersionMin(MCVersionMinType Type, unsigned Major, unsigned Minor, unsigned Update, VersionTuple SDKVersion)
Specify the Mach-O minimum deployment target version.
Definition: MCStreamer.h:454
MCStreamer & Streamer
Definition: MCStreamer.h:87
Promote Memory to Register
Definition: Mem2Reg.cpp:109
virtual void EmitCVInlineLinetableDirective(unsigned PrimaryFunctionId, unsigned SourceFileId, unsigned SourceLineNum, const MCSymbol *FnStartSym, const MCSymbol *FnEndSym)
This implements the CodeView &#39;.cv_inline_linetable&#39; assembler directive.
Definition: MCStreamer.cpp:326
MCSymbol * getBeginSymbol()
Definition: MCSection.h:110
const Triple & getTargetTriple() const
virtual void prettyPrintAsm(MCInstPrinter &InstPrinter, raw_ostream &OS, const MCInst &Inst, const MCSubtargetInfo &STI)
Definition: MCStreamer.cpp:978
StringRef str()
Return a StringRef for the vector contents.
Definition: raw_ostream.h:555
void EmitULEB128IntValue(uint64_t Value, unsigned PadTo=0)
Special case of EmitULEB128Value that avoids the client having to pass in a MCExpr for constant integ...
Definition: MCStreamer.cpp:145
virtual void ChangeSection(MCSection *, const MCExpr *)
Update streamer for a new active section.
void setVariableValue(const MCExpr *Value)
Definition: MCSymbol.cpp:48
bool hasUnfinishedDwarfFrameInfo()
Definition: MCStreamer.cpp:256
virtual void changeSection(const MCSection *CurSection, MCSection *Section, const MCExpr *SubSection, raw_ostream &OS)
Update streamer for a new active section.
Definition: MCStreamer.cpp:54
const MCSymbol * Function
Definition: MCWinEH.h:36
Target - Wrapper for Target specific information.
MCSection * getCurrentSectionOnly() const
Definition: MCStreamer.h:345
void visitUsedExpr(const MCExpr &Expr)
Definition: MCStreamer.cpp:987
bool checkCVLocSection(unsigned FuncId, unsigned FileNo, SMLoc Loc)
Returns true if the the .cv_loc directive is in the right section.
Definition: MCStreamer.cpp:300
MCTargetStreamer(MCStreamer &S)
Definition: MCStreamer.cpp:43
virtual MCSymbol * EmitCFILabel()
When emitting an object file, create and emit a real label.
Definition: MCStreamer.cpp:459
bool recordFunctionId(unsigned FuncId)
Records the function id of a normal function.
Definition: MCCodeView.cpp:86
This is an instance of a target assembly language printer that converts an MCInst to valid target ass...
Definition: MCInstPrinter.h:39
Represents a version number in the form major[.minor[.subminor[.build]]].
Definition: VersionTuple.h:26
virtual void EmitThumbFunc(MCSymbol *Func)
Note in the output that the specified Func is a Thumb mode function (ARM target only).
const MCSymbol * FuncletOrFuncEnd
Definition: MCWinEH.h:34
virtual void EmitCFISignalFrame()
Definition: MCStreamer.cpp:602
MCSymbol * getOrCreateSymbol(const Twine &Name)
Lookup the symbol inside with the specified Name.
Definition: MCContext.cpp:129
virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset)
Definition: MCStreamer.cpp:517
const MCSymbol * Personality
Definition: MCDwarf.h:611
MCAssemblerFlag
Definition: MCDirectives.h:48
bool recordInlinedCallSiteId(unsigned FuncId, unsigned IAFunc, unsigned IAFile, unsigned IALine, unsigned IACol)
Records the function id of an inlined call site.
Definition: MCCodeView.cpp:99
bool hasCOFFAssociativeComdats() const
Definition: MCAsmInfo.h:479
virtual void EmitFileDirective(StringRef Filename)
Switch to a new logical file.
virtual void EmitDTPRel32Value(const MCExpr *Value)
Emit the expression Value into the output as a dtprel (32-bit DTP relative) value.
Definition: MCStreamer.cpp:180
Generic base class for all target subtargets.
virtual void emitELFSize(MCSymbol *Symbol, const MCExpr *Value)
Emit an ELF .size directive.
References to labels and assigned expressions.
Definition: MCExpr.h:40
uint32_t Size
Definition: Profile.cpp:46
bool isLittleEndian() const
True if the target is little endian.
Definition: MCAsmInfo.h:409
void emitFill(uint64_t NumBytes, uint8_t FillValue)
Emit NumBytes bytes worth of the value specified by FillValue.
Definition: MCStreamer.cpp:202
SymbolKind
Duplicate copy of the above enum, but using the official CV names.
Definition: CodeView.h:47
virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset)
Definition: MCStreamer.cpp:465
MCSymbol * endSection(MCSection *Section)
void setCurrentDwarfLoc(unsigned FileNum, unsigned Line, unsigned Column, unsigned Flags, unsigned Isa, unsigned Discriminator)
Saves the information from the currently parsed dwarf .loc directive and sets DwarfLocSeen.
Definition: MCContext.h:601
CodeViewContext & getCVContext()
Definition: MCContext.cpp:677
WinEH::FrameInfo * EnsureValidWinFrameInfo(SMLoc Loc)
Retreive the current frame info if one is available and it is not yet closed.
Definition: MCStreamer.cpp:655
virtual void emitRawBytes(StringRef Data)
Emit the bytes in Data into the output.
Definition: MCStreamer.cpp:76
MCSymbol * getLabel() const
Definition: MCDwarf.h:346
MCSection * getTextSection() const
virtual void EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset)
Emits a COFF section relative relocation.
Definition: MCStreamer.cpp:931
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
virtual void FinishImpl()
Streamer specific finalization.
void setMCLineTableRootFile(unsigned CUID, StringRef CompilationDir, StringRef Filename, Optional< MD5::MD5Result > Checksum, Optional< StringRef > Source)
Specifies the "root" file and directory of the compilation unit.
Definition: MCContext.h:584
virtual bool EmitCVInlineSiteIdDirective(unsigned FunctionId, unsigned IAFunc, unsigned IAFile, unsigned IALine, unsigned IACol, SMLoc Loc)
Introduces an inline call site id for use with .cv_loc.
Definition: MCStreamer.cpp:281
bool isTvOS() const
Is this an Apple tvOS triple.
Definition: Triple.h:467
const MCRegisterInfo * getRegisterInfo() const
Definition: MCContext.h:320
MCVersionMinType
Definition: MCDirectives.h:64
LLVM Value Representation.
Definition: Value.h:73
Generic interface to target specific assembler backends.
Definition: MCAsmBackend.h:41
static cl::opt< bool, true > Debug("debug", cl::desc("Enable debug output"), cl::Hidden, cl::location(DebugFlag))
Constant expressions.
Definition: MCExpr.h:39
Binary expressions.
Definition: MCExpr.h:38
virtual bool EmitCVFuncIdDirective(unsigned FunctionId)
Introduces a function id for use with .cv_loc.
Definition: MCStreamer.cpp:277
raw_ostream & nulls()
This returns a reference to a raw_ostream which simply discards output.
virtual void EmitCFIBKeyFrame()
Definition: MCStreamer.cpp:230
virtual void EmitLabel(MCSymbol *Symbol, SMLoc Loc=SMLoc())
Emit a label for Symbol into the current section.
Definition: MCStreamer.cpp:399
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:45
virtual void emitCGProfileEntry(const MCSymbolRefExpr *From, const MCSymbolRefExpr *To, uint64_t Count)
Definition: MCStreamer.cpp:761
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
Target specific expression.
Definition: MCExpr.h:42
Information describing a function or inlined call site introduced by .cv_func_id or ...
Definition: MCCodeView.h:91
virtual void visitUsedSymbol(const MCSymbol &Sym)
Definition: MCStreamer.cpp:984
virtual void emitDwarfFileDirective(StringRef Directive)
Definition: MCStreamer.cpp:64
Represents a location in source code.
Definition: SMLoc.h:23
static MCCFIInstruction createEscape(MCSymbol *L, StringRef Vals)
.cfi_escape Allows the user to add arbitrary bytes to the unwind info.
Definition: MCDwarf.h:568
bool isUIntN(unsigned N, uint64_t x)
Checks if an unsigned integer fits into the given (dynamic) bit width.
Definition: MathExtras.h:392
const MCSymbol * ExceptionHandler
Definition: MCWinEH.h:35
void EmitVersionForTarget(const Triple &Target, const VersionTuple &SDKVersion)
void setTargetStreamer(MCTargetStreamer *TS)
Definition: MCStreamer.h:244
virtual void emitAssignment(MCSymbol *Symbol, const MCExpr *Value)
Definition: MCStreamer.cpp:88
virtual void EmitCOFFSectionIndex(MCSymbol const *Symbol)
Emits a COFF section index.
Definition: MCStreamer.cpp:929
virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment)
Definition: MCStreamer.cpp:486
void setLabel(MCSymbol *Label)
Definition: MCDwarf.h:350
static MCCFIInstruction createRegister(MCSymbol *L, unsigned Register1, unsigned Register2)
.cfi_register Previous value of Register1 is saved in register Register2.
Definition: MCDwarf.h:522
Wrapper class representing virtual and physical registers.
Definition: Register.h:19
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue)
Set the DescValue for the Symbol.
void EmitCFIStartProc(bool IsSimple, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:421
virtual void EmitCFIWindowSave()
Definition: MCStreamer.cpp:629
MCSection * getAssociatedXDataSection(const MCSection *TextSec)
Get the .xdata section used for the given section.
Definition: MCStreamer.cpp:806
void resize(size_type N)
Definition: SmallVector.h:344
Holds state from .cv_file and .cv_loc directives for later emission.
Definition: MCCodeView.h:137