LLVM  9.0.0svn
MCAsmStreamer.cpp
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1 //===- lib/MC/MCAsmStreamer.cpp - Text Assembly Output ----------*- C++ -*-===//
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/ADT/Optional.h"
10 #include "llvm/ADT/STLExtras.h"
11 #include "llvm/ADT/SmallString.h"
12 #include "llvm/ADT/StringExtras.h"
13 #include "llvm/ADT/Twine.h"
14 #include "llvm/MC/MCAsmBackend.h"
15 #include "llvm/MC/MCAsmInfo.h"
16 #include "llvm/MC/MCAssembler.h"
17 #include "llvm/MC/MCCodeEmitter.h"
18 #include "llvm/MC/MCCodeView.h"
19 #include "llvm/MC/MCContext.h"
20 #include "llvm/MC/MCExpr.h"
22 #include "llvm/MC/MCInst.h"
23 #include "llvm/MC/MCInstPrinter.h"
25 #include "llvm/MC/MCObjectWriter.h"
26 #include "llvm/MC/MCRegisterInfo.h"
27 #include "llvm/MC/MCSectionMachO.h"
28 #include "llvm/MC/MCStreamer.h"
30 #include "llvm/Support/Format.h"
32 #include "llvm/Support/LEB128.h"
34 #include "llvm/Support/Path.h"
36 #include <cctype>
37 
38 using namespace llvm;
39 
40 namespace {
41 
42 class MCAsmStreamer final : public MCStreamer {
43  std::unique_ptr<formatted_raw_ostream> OSOwner;
45  const MCAsmInfo *MAI;
46  std::unique_ptr<MCInstPrinter> InstPrinter;
47  std::unique_ptr<MCAssembler> Assembler;
48 
49  SmallString<128> ExplicitCommentToEmit;
50  SmallString<128> CommentToEmit;
51  raw_svector_ostream CommentStream;
52  raw_null_ostream NullStream;
53 
54  unsigned IsVerboseAsm : 1;
55  unsigned ShowInst : 1;
56  unsigned UseDwarfDirectory : 1;
57 
58  void EmitRegisterName(int64_t Register);
59  void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override;
60  void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override;
61 
62 public:
63  MCAsmStreamer(MCContext &Context, std::unique_ptr<formatted_raw_ostream> os,
64  bool isVerboseAsm, bool useDwarfDirectory,
65  MCInstPrinter *printer, std::unique_ptr<MCCodeEmitter> emitter,
66  std::unique_ptr<MCAsmBackend> asmbackend, bool showInst)
67  : MCStreamer(Context), OSOwner(std::move(os)), OS(*OSOwner),
68  MAI(Context.getAsmInfo()), InstPrinter(printer),
69  Assembler(llvm::make_unique<MCAssembler>(
70  Context, std::move(asmbackend), std::move(emitter),
71  (asmbackend) ? asmbackend->createObjectWriter(NullStream)
72  : nullptr)),
73  CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm),
74  ShowInst(showInst), UseDwarfDirectory(useDwarfDirectory) {
75  assert(InstPrinter);
76  if (IsVerboseAsm)
77  InstPrinter->setCommentStream(CommentStream);
78  }
79 
80  MCAssembler &getAssembler() { return *Assembler; }
81  MCAssembler *getAssemblerPtr() override { return nullptr; }
82 
83  inline void EmitEOL() {
84  // Dump Explicit Comments here.
85  emitExplicitComments();
86  // If we don't have any comments, just emit a \n.
87  if (!IsVerboseAsm) {
88  OS << '\n';
89  return;
90  }
91  EmitCommentsAndEOL();
92  }
93 
94  void EmitSyntaxDirective() override;
95 
96  void EmitCommentsAndEOL();
97 
98  /// Return true if this streamer supports verbose assembly at all.
99  bool isVerboseAsm() const override { return IsVerboseAsm; }
100 
101  /// Do we support EmitRawText?
102  bool hasRawTextSupport() const override { return true; }
103 
104  /// Add a comment that can be emitted to the generated .s file to make the
105  /// output of the compiler more readable. This only affects the MCAsmStreamer
106  /// and only when verbose assembly output is enabled.
107  void AddComment(const Twine &T, bool EOL = true) override;
108 
109  /// Add a comment showing the encoding of an instruction.
110  void AddEncodingComment(const MCInst &Inst, const MCSubtargetInfo &);
111 
112  /// Return a raw_ostream that comments can be written to.
113  /// Unlike AddComment, you are required to terminate comments with \n if you
114  /// use this method.
115  raw_ostream &GetCommentOS() override {
116  if (!IsVerboseAsm)
117  return nulls(); // Discard comments unless in verbose asm mode.
118  return CommentStream;
119  }
120 
121  void emitRawComment(const Twine &T, bool TabPrefix = true) override;
122 
123  void addExplicitComment(const Twine &T) override;
124  void emitExplicitComments() override;
125 
126  /// Emit a blank line to a .s file to pretty it up.
127  void AddBlankLine() override {
128  EmitEOL();
129  }
130 
131  /// @name MCStreamer Interface
132  /// @{
133 
134  void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
135 
136  void emitELFSymverDirective(StringRef AliasName,
137  const MCSymbol *Aliasee) override;
138 
139  void EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) override;
140  void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
141 
142  void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
143  void EmitLinkerOptions(ArrayRef<std::string> Options) override;
144  void EmitDataRegion(MCDataRegionType Kind) override;
145  void EmitVersionMin(MCVersionMinType Kind, unsigned Major, unsigned Minor,
146  unsigned Update, VersionTuple SDKVersion) override;
147  void EmitBuildVersion(unsigned Platform, unsigned Major, unsigned Minor,
148  unsigned Update, VersionTuple SDKVersion) override;
149  void EmitThumbFunc(MCSymbol *Func) override;
150 
151  void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override;
152  void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
153  bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
154 
155  void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
156  void BeginCOFFSymbolDef(const MCSymbol *Symbol) override;
157  void EmitCOFFSymbolStorageClass(int StorageClass) override;
158  void EmitCOFFSymbolType(int Type) override;
159  void EndCOFFSymbolDef() override;
160  void EmitCOFFSafeSEH(MCSymbol const *Symbol) override;
161  void EmitCOFFSymbolIndex(MCSymbol const *Symbol) override;
162  void EmitCOFFSectionIndex(MCSymbol const *Symbol) override;
163  void EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset) override;
164  void EmitCOFFImgRel32(MCSymbol const *Symbol, int64_t Offset) override;
165  void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
166  void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
167  unsigned ByteAlignment) override;
168 
169  /// Emit a local common (.lcomm) symbol.
170  ///
171  /// @param Symbol - The common symbol to emit.
172  /// @param Size - The size of the common symbol.
173  /// @param ByteAlignment - The alignment of the common symbol in bytes.
174  void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
175  unsigned ByteAlignment) override;
176 
177  void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
178  uint64_t Size = 0, unsigned ByteAlignment = 0,
179  SMLoc Loc = SMLoc()) override;
180 
181  void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
182  unsigned ByteAlignment = 0) override;
183 
184  void EmitBinaryData(StringRef Data) override;
185 
186  void EmitBytes(StringRef Data) override;
187 
188  void EmitValueImpl(const MCExpr *Value, unsigned Size,
189  SMLoc Loc = SMLoc()) override;
190  void EmitIntValue(uint64_t Value, unsigned Size) override;
191  void EmitIntValueInHex(uint64_t Value, unsigned Size) override;
192 
193  void EmitULEB128Value(const MCExpr *Value) override;
194 
195  void EmitSLEB128Value(const MCExpr *Value) override;
196 
197  void EmitDTPRel32Value(const MCExpr *Value) override;
198  void EmitDTPRel64Value(const MCExpr *Value) override;
199  void EmitTPRel32Value(const MCExpr *Value) override;
200  void EmitTPRel64Value(const MCExpr *Value) override;
201 
202  void EmitGPRel64Value(const MCExpr *Value) override;
203 
204  void EmitGPRel32Value(const MCExpr *Value) override;
205 
206  void emitFill(const MCExpr &NumBytes, uint64_t FillValue,
207  SMLoc Loc = SMLoc()) override;
208 
209  void emitFill(const MCExpr &NumValues, int64_t Size, int64_t Expr,
210  SMLoc Loc = SMLoc()) override;
211 
212  void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
213  unsigned ValueSize = 1,
214  unsigned MaxBytesToEmit = 0) override;
215 
216  void EmitCodeAlignment(unsigned ByteAlignment,
217  unsigned MaxBytesToEmit = 0) override;
218 
219  void emitValueToOffset(const MCExpr *Offset,
220  unsigned char Value,
221  SMLoc Loc) override;
222 
223  void EmitFileDirective(StringRef Filename) override;
224  Expected<unsigned> tryEmitDwarfFileDirective(unsigned FileNo,
225  StringRef Directory,
226  StringRef Filename,
227  Optional<MD5::MD5Result> Checksum = None,
229  unsigned CUID = 0) override;
230  void emitDwarfFile0Directive(StringRef Directory, StringRef Filename,
231  Optional<MD5::MD5Result> Checksum,
233  unsigned CUID = 0) override;
234  void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
235  unsigned Column, unsigned Flags,
236  unsigned Isa, unsigned Discriminator,
237  StringRef FileName) override;
238  MCSymbol *getDwarfLineTableSymbol(unsigned CUID) override;
239 
240  bool EmitCVFileDirective(unsigned FileNo, StringRef Filename,
241  ArrayRef<uint8_t> Checksum,
242  unsigned ChecksumKind) override;
243  bool EmitCVFuncIdDirective(unsigned FuncId) override;
244  bool EmitCVInlineSiteIdDirective(unsigned FunctionId, unsigned IAFunc,
245  unsigned IAFile, unsigned IALine,
246  unsigned IACol, SMLoc Loc) override;
247  void EmitCVLocDirective(unsigned FunctionId, unsigned FileNo, unsigned Line,
248  unsigned Column, bool PrologueEnd, bool IsStmt,
249  StringRef FileName, SMLoc Loc) override;
250  void EmitCVLinetableDirective(unsigned FunctionId, const MCSymbol *FnStart,
251  const MCSymbol *FnEnd) override;
252  void EmitCVInlineLinetableDirective(unsigned PrimaryFunctionId,
253  unsigned SourceFileId,
254  unsigned SourceLineNum,
255  const MCSymbol *FnStartSym,
256  const MCSymbol *FnEndSym) override;
257  void EmitCVDefRangeDirective(
258  ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
259  StringRef FixedSizePortion) override;
260  void EmitCVStringTableDirective() override;
261  void EmitCVFileChecksumsDirective() override;
262  void EmitCVFileChecksumOffsetDirective(unsigned FileNo) override;
263  void EmitCVFPOData(const MCSymbol *ProcSym, SMLoc L) override;
264 
265  void EmitIdent(StringRef IdentString) override;
266  void EmitCFIBKeyFrame() override;
267  void EmitCFISections(bool EH, bool Debug) override;
268  void EmitCFIDefCfa(int64_t Register, int64_t Offset) override;
269  void EmitCFIDefCfaOffset(int64_t Offset) override;
270  void EmitCFIDefCfaRegister(int64_t Register) override;
271  void EmitCFIOffset(int64_t Register, int64_t Offset) override;
272  void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding) override;
273  void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) override;
274  void EmitCFIRememberState() override;
275  void EmitCFIRestoreState() override;
276  void EmitCFIRestore(int64_t Register) override;
277  void EmitCFISameValue(int64_t Register) override;
278  void EmitCFIRelOffset(int64_t Register, int64_t Offset) override;
279  void EmitCFIAdjustCfaOffset(int64_t Adjustment) override;
280  void EmitCFIEscape(StringRef Values) override;
281  void EmitCFIGnuArgsSize(int64_t Size) override;
282  void EmitCFISignalFrame() override;
283  void EmitCFIUndefined(int64_t Register) override;
284  void EmitCFIRegister(int64_t Register1, int64_t Register2) override;
285  void EmitCFIWindowSave() override;
286  void EmitCFINegateRAState() override;
287  void EmitCFIReturnColumn(int64_t Register) override;
288 
289  void EmitWinCFIStartProc(const MCSymbol *Symbol, SMLoc Loc) override;
290  void EmitWinCFIEndProc(SMLoc Loc) override;
291  void EmitWinCFIFuncletOrFuncEnd(SMLoc Loc) override;
292  void EmitWinCFIStartChained(SMLoc Loc) override;
293  void EmitWinCFIEndChained(SMLoc Loc) override;
294  void EmitWinCFIPushReg(unsigned Register, SMLoc Loc) override;
295  void EmitWinCFISetFrame(unsigned Register, unsigned Offset,
296  SMLoc Loc) override;
297  void EmitWinCFIAllocStack(unsigned Size, SMLoc Loc) override;
298  void EmitWinCFISaveReg(unsigned Register, unsigned Offset,
299  SMLoc Loc) override;
300  void EmitWinCFISaveXMM(unsigned Register, unsigned Offset,
301  SMLoc Loc) override;
302  void EmitWinCFIPushFrame(bool Code, SMLoc Loc) override;
303  void EmitWinCFIEndProlog(SMLoc Loc) override;
304 
305  void EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except,
306  SMLoc Loc) override;
307  void EmitWinEHHandlerData(SMLoc Loc) override;
308 
309  void emitCGProfileEntry(const MCSymbolRefExpr *From,
310  const MCSymbolRefExpr *To, uint64_t Count) override;
311 
312  void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
313 
314  void EmitBundleAlignMode(unsigned AlignPow2) override;
315  void EmitBundleLock(bool AlignToEnd) override;
316  void EmitBundleUnlock() override;
317 
318  bool EmitRelocDirective(const MCExpr &Offset, StringRef Name,
319  const MCExpr *Expr, SMLoc Loc,
320  const MCSubtargetInfo &STI) override;
321 
322  void EmitAddrsig() override;
323  void EmitAddrsigSym(const MCSymbol *Sym) override;
324 
325  /// If this file is backed by an assembly streamer, this dumps the specified
326  /// string in the output .s file. This capability is indicated by the
327  /// hasRawTextSupport() predicate.
328  void EmitRawTextImpl(StringRef String) override;
329 
330  void FinishImpl() override;
331 };
332 
333 } // end anonymous namespace.
334 
335 void MCAsmStreamer::AddComment(const Twine &T, bool EOL) {
336  if (!IsVerboseAsm) return;
337 
338  T.toVector(CommentToEmit);
339 
340  if (EOL)
341  CommentToEmit.push_back('\n'); // Place comment in a new line.
342 }
343 
344 void MCAsmStreamer::EmitCommentsAndEOL() {
345  if (CommentToEmit.empty() && CommentStream.GetNumBytesInBuffer() == 0) {
346  OS << '\n';
347  return;
348  }
349 
350  StringRef Comments = CommentToEmit;
351 
352  assert(Comments.back() == '\n' &&
353  "Comment array not newline terminated");
354  do {
355  // Emit a line of comments.
356  OS.PadToColumn(MAI->getCommentColumn());
357  size_t Position = Comments.find('\n');
358  OS << MAI->getCommentString() << ' ' << Comments.substr(0, Position) <<'\n';
359 
360  Comments = Comments.substr(Position+1);
361  } while (!Comments.empty());
362 
363  CommentToEmit.clear();
364 }
365 
366 static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
367  assert(Bytes > 0 && Bytes <= 8 && "Invalid size!");
368  return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8));
369 }
370 
371 void MCAsmStreamer::emitRawComment(const Twine &T, bool TabPrefix) {
372  if (TabPrefix)
373  OS << '\t';
374  OS << MAI->getCommentString() << T;
375  EmitEOL();
376 }
377 
378 void MCAsmStreamer::addExplicitComment(const Twine &T) {
380  if (c.equals(StringRef(MAI->getSeparatorString())))
381  return;
382  if (c.startswith(StringRef("//"))) {
383  ExplicitCommentToEmit.append("\t");
384  ExplicitCommentToEmit.append(MAI->getCommentString());
385  // drop //
386  ExplicitCommentToEmit.append(c.slice(2, c.size()).str());
387  } else if (c.startswith(StringRef("/*"))) {
388  size_t p = 2, len = c.size() - 2;
389  // emit each line in comment as separate newline.
390  do {
391  size_t newp = std::min(len, c.find_first_of("\r\n", p));
392  ExplicitCommentToEmit.append("\t");
393  ExplicitCommentToEmit.append(MAI->getCommentString());
394  ExplicitCommentToEmit.append(c.slice(p, newp).str());
395  // If we have another line in this comment add line
396  if (newp < len)
397  ExplicitCommentToEmit.append("\n");
398  p = newp + 1;
399  } while (p < len);
400  } else if (c.startswith(StringRef(MAI->getCommentString()))) {
401  ExplicitCommentToEmit.append("\t");
402  ExplicitCommentToEmit.append(c.str());
403  } else if (c.front() == '#') {
404 
405  ExplicitCommentToEmit.append("\t");
406  ExplicitCommentToEmit.append(MAI->getCommentString());
407  ExplicitCommentToEmit.append(c.slice(1, c.size()).str());
408  } else
409  assert(false && "Unexpected Assembly Comment");
410  // full line comments immediately output
411  if (c.back() == '\n')
412  emitExplicitComments();
413 }
414 
415 void MCAsmStreamer::emitExplicitComments() {
416  StringRef Comments = ExplicitCommentToEmit;
417  if (!Comments.empty())
418  OS << Comments;
419  ExplicitCommentToEmit.clear();
420 }
421 
422 void MCAsmStreamer::ChangeSection(MCSection *Section,
423  const MCExpr *Subsection) {
424  assert(Section && "Cannot switch to a null section!");
425  if (MCTargetStreamer *TS = getTargetStreamer()) {
426  TS->changeSection(getCurrentSectionOnly(), Section, Subsection, OS);
427  } else {
428  Section->PrintSwitchToSection(
429  *MAI, getContext().getObjectFileInfo()->getTargetTriple(), OS,
430  Subsection);
431  }
432 }
433 
434 void MCAsmStreamer::emitELFSymverDirective(StringRef AliasName,
435  const MCSymbol *Aliasee) {
436  OS << ".symver ";
437  Aliasee->print(OS, MAI);
438  OS << ", " << AliasName;
439  EmitEOL();
440 }
441 
442 void MCAsmStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
443  MCStreamer::EmitLabel(Symbol, Loc);
444 
445  Symbol->print(OS, MAI);
446  OS << MAI->getLabelSuffix();
447 
448  EmitEOL();
449 }
450 
451 void MCAsmStreamer::EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) {
452  StringRef str = MCLOHIdToName(Kind);
453 
454 #ifndef NDEBUG
455  int NbArgs = MCLOHIdToNbArgs(Kind);
456  assert(NbArgs != -1 && ((size_t)NbArgs) == Args.size() && "Malformed LOH!");
457  assert(str != "" && "Invalid LOH name");
458 #endif
459 
460  OS << "\t" << MCLOHDirectiveName() << " " << str << "\t";
461  bool IsFirst = true;
462  for (const MCSymbol *Arg : Args) {
463  if (!IsFirst)
464  OS << ", ";
465  IsFirst = false;
466  Arg->print(OS, MAI);
467  }
468  EmitEOL();
469 }
470 
471 void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
472  switch (Flag) {
473  case MCAF_SyntaxUnified: OS << "\t.syntax unified"; break;
474  case MCAF_SubsectionsViaSymbols: OS << ".subsections_via_symbols"; break;
475  case MCAF_Code16: OS << '\t'<< MAI->getCode16Directive();break;
476  case MCAF_Code32: OS << '\t'<< MAI->getCode32Directive();break;
477  case MCAF_Code64: OS << '\t'<< MAI->getCode64Directive();break;
478  }
479  EmitEOL();
480 }
481 
482 void MCAsmStreamer::EmitLinkerOptions(ArrayRef<std::string> Options) {
483  assert(!Options.empty() && "At least one option is required!");
484  OS << "\t.linker_option \"" << Options[0] << '"';
485  for (ArrayRef<std::string>::iterator it = Options.begin() + 1,
486  ie = Options.end(); it != ie; ++it) {
487  OS << ", " << '"' << *it << '"';
488  }
489  EmitEOL();
490 }
491 
492 void MCAsmStreamer::EmitDataRegion(MCDataRegionType Kind) {
494  return;
495  switch (Kind) {
496  case MCDR_DataRegion: OS << "\t.data_region"; break;
497  case MCDR_DataRegionJT8: OS << "\t.data_region jt8"; break;
498  case MCDR_DataRegionJT16: OS << "\t.data_region jt16"; break;
499  case MCDR_DataRegionJT32: OS << "\t.data_region jt32"; break;
500  case MCDR_DataRegionEnd: OS << "\t.end_data_region"; break;
501  }
502  EmitEOL();
503 }
504 
506  switch (Type) {
507  case MCVM_WatchOSVersionMin: return ".watchos_version_min";
508  case MCVM_TvOSVersionMin: return ".tvos_version_min";
509  case MCVM_IOSVersionMin: return ".ios_version_min";
510  case MCVM_OSXVersionMin: return ".macosx_version_min";
511  }
512  llvm_unreachable("Invalid MC version min type");
513 }
514 
516  const VersionTuple &SDKVersion) {
517  if (SDKVersion.empty())
518  return;
519  OS << '\t' << "sdk_version " << SDKVersion.getMajor();
520  if (auto Minor = SDKVersion.getMinor()) {
521  OS << ", " << *Minor;
522  if (auto Subminor = SDKVersion.getSubminor()) {
523  OS << ", " << *Subminor;
524  }
525  }
526 }
527 
528 void MCAsmStreamer::EmitVersionMin(MCVersionMinType Type, unsigned Major,
529  unsigned Minor, unsigned Update,
530  VersionTuple SDKVersion) {
531  OS << '\t' << getVersionMinDirective(Type) << ' ' << Major << ", " << Minor;
532  if (Update)
533  OS << ", " << Update;
534  EmitSDKVersionSuffix(OS, SDKVersion);
535  EmitEOL();
536 }
537 
538 static const char *getPlatformName(MachO::PlatformType Type) {
539  switch (Type) {
540  case MachO::PLATFORM_MACOS: return "macos";
541  case MachO::PLATFORM_IOS: return "ios";
542  case MachO::PLATFORM_TVOS: return "tvos";
543  case MachO::PLATFORM_WATCHOS: return "watchos";
544  case MachO::PLATFORM_BRIDGEOS: return "bridgeos";
545  case MachO::PLATFORM_MACCATALYST: return "macCatalyst";
546  case MachO::PLATFORM_IOSSIMULATOR: return "iossimulator";
547  case MachO::PLATFORM_TVOSSIMULATOR: return "tvossimulator";
548  case MachO::PLATFORM_WATCHOSSIMULATOR: return "watchossimulator";
549  }
550  llvm_unreachable("Invalid Mach-O platform type");
551 }
552 
553 void MCAsmStreamer::EmitBuildVersion(unsigned Platform, unsigned Major,
554  unsigned Minor, unsigned Update,
555  VersionTuple SDKVersion) {
556  const char *PlatformName = getPlatformName((MachO::PlatformType)Platform);
557  OS << "\t.build_version " << PlatformName << ", " << Major << ", " << Minor;
558  if (Update)
559  OS << ", " << Update;
560  EmitSDKVersionSuffix(OS, SDKVersion);
561  EmitEOL();
562 }
563 
564 void MCAsmStreamer::EmitThumbFunc(MCSymbol *Func) {
565  // This needs to emit to a temporary string to get properly quoted
566  // MCSymbols when they have spaces in them.
567  OS << "\t.thumb_func";
568  // Only Mach-O hasSubsectionsViaSymbols()
569  if (MAI->hasSubsectionsViaSymbols()) {
570  OS << '\t';
571  Func->print(OS, MAI);
572  }
573  EmitEOL();
574 }
575 
576 void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
577  // Do not emit a .set on inlined target assignments.
578  bool EmitSet = true;
579  if (auto *E = dyn_cast<MCTargetExpr>(Value))
580  if (E->inlineAssignedExpr())
581  EmitSet = false;
582  if (EmitSet) {
583  OS << ".set ";
584  Symbol->print(OS, MAI);
585  OS << ", ";
586  Value->print(OS, MAI);
587 
588  EmitEOL();
589  }
590 
591  MCStreamer::EmitAssignment(Symbol, Value);
592 }
593 
594 void MCAsmStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {
595  OS << ".weakref ";
596  Alias->print(OS, MAI);
597  OS << ", ";
598  Symbol->print(OS, MAI);
599  EmitEOL();
600 }
601 
602 bool MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
604  switch (Attribute) {
605  case MCSA_Invalid: llvm_unreachable("Invalid symbol attribute");
606  case MCSA_ELF_TypeFunction: /// .type _foo, STT_FUNC # aka @function
607  case MCSA_ELF_TypeIndFunction: /// .type _foo, STT_GNU_IFUNC
608  case MCSA_ELF_TypeObject: /// .type _foo, STT_OBJECT # aka @object
609  case MCSA_ELF_TypeTLS: /// .type _foo, STT_TLS # aka @tls_object
610  case MCSA_ELF_TypeCommon: /// .type _foo, STT_COMMON # aka @common
611  case MCSA_ELF_TypeNoType: /// .type _foo, STT_NOTYPE # aka @notype
612  case MCSA_ELF_TypeGnuUniqueObject: /// .type _foo, @gnu_unique_object
613  if (!MAI->hasDotTypeDotSizeDirective())
614  return false; // Symbol attribute not supported
615  OS << "\t.type\t";
616  Symbol->print(OS, MAI);
617  OS << ',' << ((MAI->getCommentString()[0] != '@') ? '@' : '%');
618  switch (Attribute) {
619  default: return false;
620  case MCSA_ELF_TypeFunction: OS << "function"; break;
621  case MCSA_ELF_TypeIndFunction: OS << "gnu_indirect_function"; break;
622  case MCSA_ELF_TypeObject: OS << "object"; break;
623  case MCSA_ELF_TypeTLS: OS << "tls_object"; break;
624  case MCSA_ELF_TypeCommon: OS << "common"; break;
625  case MCSA_ELF_TypeNoType: OS << "notype"; break;
626  case MCSA_ELF_TypeGnuUniqueObject: OS << "gnu_unique_object"; break;
627  }
628  EmitEOL();
629  return true;
630  case MCSA_Global: // .globl/.global
631  OS << MAI->getGlobalDirective();
632  break;
633  case MCSA_Hidden: OS << "\t.hidden\t"; break;
634  case MCSA_IndirectSymbol: OS << "\t.indirect_symbol\t"; break;
635  case MCSA_Internal: OS << "\t.internal\t"; break;
636  case MCSA_LazyReference: OS << "\t.lazy_reference\t"; break;
637  case MCSA_Local: OS << "\t.local\t"; break;
638  case MCSA_NoDeadStrip:
639  if (!MAI->hasNoDeadStrip())
640  return false;
641  OS << "\t.no_dead_strip\t";
642  break;
643  case MCSA_SymbolResolver: OS << "\t.symbol_resolver\t"; break;
644  case MCSA_AltEntry: OS << "\t.alt_entry\t"; break;
645  case MCSA_PrivateExtern:
646  OS << "\t.private_extern\t";
647  break;
648  case MCSA_Protected: OS << "\t.protected\t"; break;
649  case MCSA_Reference: OS << "\t.reference\t"; break;
650  case MCSA_Weak: OS << MAI->getWeakDirective(); break;
651  case MCSA_WeakDefinition:
652  OS << "\t.weak_definition\t";
653  break;
654  // .weak_reference
655  case MCSA_WeakReference: OS << MAI->getWeakRefDirective(); break;
656  case MCSA_WeakDefAutoPrivate: OS << "\t.weak_def_can_be_hidden\t"; break;
657  case MCSA_Cold:
658  // Assemblers currently do not support a .cold directive.
659  return false;
660  }
661 
662  Symbol->print(OS, MAI);
663  EmitEOL();
664 
665  return true;
666 }
667 
668 void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
669  OS << ".desc" << ' ';
670  Symbol->print(OS, MAI);
671  OS << ',' << DescValue;
672  EmitEOL();
673 }
674 
675 void MCAsmStreamer::EmitSyntaxDirective() {
676  if (MAI->getAssemblerDialect() == 1) {
677  OS << "\t.intel_syntax noprefix";
678  EmitEOL();
679  }
680  // FIXME: Currently emit unprefix'ed registers.
681  // The intel_syntax directive has one optional argument
682  // with may have a value of prefix or noprefix.
683 }
684 
685 void MCAsmStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {
686  OS << "\t.def\t ";
687  Symbol->print(OS, MAI);
688  OS << ';';
689  EmitEOL();
690 }
691 
692 void MCAsmStreamer::EmitCOFFSymbolStorageClass (int StorageClass) {
693  OS << "\t.scl\t" << StorageClass << ';';
694  EmitEOL();
695 }
696 
697 void MCAsmStreamer::EmitCOFFSymbolType (int Type) {
698  OS << "\t.type\t" << Type << ';';
699  EmitEOL();
700 }
701 
702 void MCAsmStreamer::EndCOFFSymbolDef() {
703  OS << "\t.endef";
704  EmitEOL();
705 }
706 
707 void MCAsmStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {
708  OS << "\t.safeseh\t";
709  Symbol->print(OS, MAI);
710  EmitEOL();
711 }
712 
713 void MCAsmStreamer::EmitCOFFSymbolIndex(MCSymbol const *Symbol) {
714  OS << "\t.symidx\t";
715  Symbol->print(OS, MAI);
716  EmitEOL();
717 }
718 
719 void MCAsmStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
720  OS << "\t.secidx\t";
721  Symbol->print(OS, MAI);
722  EmitEOL();
723 }
724 
725 void MCAsmStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset) {
726  OS << "\t.secrel32\t";
727  Symbol->print(OS, MAI);
728  if (Offset != 0)
729  OS << '+' << Offset;
730  EmitEOL();
731 }
732 
733 void MCAsmStreamer::EmitCOFFImgRel32(MCSymbol const *Symbol, int64_t Offset) {
734  OS << "\t.rva\t";
735  Symbol->print(OS, MAI);
736  if (Offset > 0)
737  OS << '+' << Offset;
738  else if (Offset < 0)
739  OS << '-' << -Offset;
740  EmitEOL();
741 }
742 
743 void MCAsmStreamer::emitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
745  OS << "\t.size\t";
746  Symbol->print(OS, MAI);
747  OS << ", ";
748  Value->print(OS, MAI);
749  EmitEOL();
750 }
751 
752 void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
753  unsigned ByteAlignment) {
754  OS << "\t.comm\t";
755  Symbol->print(OS, MAI);
756  OS << ',' << Size;
757 
758  if (ByteAlignment != 0) {
760  OS << ',' << ByteAlignment;
761  else
762  OS << ',' << Log2_32(ByteAlignment);
763  }
764  EmitEOL();
765 }
766 
767 void MCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
768  unsigned ByteAlign) {
769  OS << "\t.lcomm\t";
770  Symbol->print(OS, MAI);
771  OS << ',' << Size;
772 
773  if (ByteAlign > 1) {
774  switch (MAI->getLCOMMDirectiveAlignmentType()) {
775  case LCOMM::NoAlignment:
776  llvm_unreachable("alignment not supported on .lcomm!");
778  OS << ',' << ByteAlign;
779  break;
781  assert(isPowerOf2_32(ByteAlign) && "alignment must be a power of 2");
782  OS << ',' << Log2_32(ByteAlign);
783  break;
784  }
785  }
786  EmitEOL();
787 }
788 
789 void MCAsmStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
790  uint64_t Size, unsigned ByteAlignment,
791  SMLoc Loc) {
792  if (Symbol)
793  AssignFragment(Symbol, &Section->getDummyFragment());
794 
795  // Note: a .zerofill directive does not switch sections.
796  OS << ".zerofill ";
797 
798  assert(Section->getVariant() == MCSection::SV_MachO &&
799  ".zerofill is a Mach-O specific directive");
800  // This is a mach-o specific directive.
801 
802  const MCSectionMachO *MOSection = ((const MCSectionMachO*)Section);
803  OS << MOSection->getSegmentName() << "," << MOSection->getSectionName();
804 
805  if (Symbol) {
806  OS << ',';
807  Symbol->print(OS, MAI);
808  OS << ',' << Size;
809  if (ByteAlignment != 0)
810  OS << ',' << Log2_32(ByteAlignment);
811  }
812  EmitEOL();
813 }
814 
815 // .tbss sym, size, align
816 // This depends that the symbol has already been mangled from the original,
817 // e.g. _a.
818 void MCAsmStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
819  uint64_t Size, unsigned ByteAlignment) {
820  AssignFragment(Symbol, &Section->getDummyFragment());
821 
822  assert(Symbol && "Symbol shouldn't be NULL!");
823  // Instead of using the Section we'll just use the shortcut.
824 
825  assert(Section->getVariant() == MCSection::SV_MachO &&
826  ".zerofill is a Mach-O specific directive");
827  // This is a mach-o specific directive and section.
828 
829  OS << ".tbss ";
830  Symbol->print(OS, MAI);
831  OS << ", " << Size;
832 
833  // Output align if we have it. We default to 1 so don't bother printing
834  // that.
835  if (ByteAlignment > 1) OS << ", " << Log2_32(ByteAlignment);
836 
837  EmitEOL();
838 }
839 
840 static inline char toOctal(int X) { return (X&7)+'0'; }
841 
842 static void PrintQuotedString(StringRef Data, raw_ostream &OS) {
843  OS << '"';
844 
845  for (unsigned i = 0, e = Data.size(); i != e; ++i) {
846  unsigned char C = Data[i];
847  if (C == '"' || C == '\\') {
848  OS << '\\' << (char)C;
849  continue;
850  }
851 
852  if (isPrint((unsigned char)C)) {
853  OS << (char)C;
854  continue;
855  }
856 
857  switch (C) {
858  case '\b': OS << "\\b"; break;
859  case '\f': OS << "\\f"; break;
860  case '\n': OS << "\\n"; break;
861  case '\r': OS << "\\r"; break;
862  case '\t': OS << "\\t"; break;
863  default:
864  OS << '\\';
865  OS << toOctal(C >> 6);
866  OS << toOctal(C >> 3);
867  OS << toOctal(C >> 0);
868  break;
869  }
870  }
871 
872  OS << '"';
873 }
874 
875 void MCAsmStreamer::EmitBytes(StringRef Data) {
876  assert(getCurrentSectionOnly() &&
877  "Cannot emit contents before setting section!");
878  if (Data.empty()) return;
879 
880  // If only single byte is provided or no ascii or asciz directives is
881  // supported, emit as vector of 8bits data.
882  if (Data.size() == 1 ||
883  !(MAI->getAscizDirective() || MAI->getAsciiDirective())) {
884  if (MCTargetStreamer *TS = getTargetStreamer()) {
885  TS->emitRawBytes(Data);
886  } else {
887  const char *Directive = MAI->getData8bitsDirective();
888  for (const unsigned char C : Data.bytes()) {
889  OS << Directive << (unsigned)C;
890  EmitEOL();
891  }
892  }
893  return;
894  }
895 
896  // If the data ends with 0 and the target supports .asciz, use it, otherwise
897  // use .ascii
898  if (MAI->getAscizDirective() && Data.back() == 0) {
899  OS << MAI->getAscizDirective();
900  Data = Data.substr(0, Data.size()-1);
901  } else {
902  OS << MAI->getAsciiDirective();
903  }
904 
905  PrintQuotedString(Data, OS);
906  EmitEOL();
907 }
908 
909 void MCAsmStreamer::EmitBinaryData(StringRef Data) {
910  // This is binary data. Print it in a grid of hex bytes for readability.
911  const size_t Cols = 4;
912  for (size_t I = 0, EI = alignTo(Data.size(), Cols); I < EI; I += Cols) {
913  size_t J = I, EJ = std::min(I + Cols, Data.size());
914  assert(EJ > 0);
915  OS << MAI->getData8bitsDirective();
916  for (; J < EJ - 1; ++J)
917  OS << format("0x%02x", uint8_t(Data[J])) << ", ";
918  OS << format("0x%02x", uint8_t(Data[J]));
919  EmitEOL();
920  }
921 }
922 
923 void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
924  EmitValue(MCConstantExpr::create(Value, getContext()), Size);
925 }
926 
927 void MCAsmStreamer::EmitIntValueInHex(uint64_t Value, unsigned Size) {
928  EmitValue(MCConstantExpr::create(Value, getContext(), true), Size);
929 }
930 
931 void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
932  SMLoc Loc) {
933  assert(Size <= 8 && "Invalid size");
934  assert(getCurrentSectionOnly() &&
935  "Cannot emit contents before setting section!");
936  const char *Directive = nullptr;
937  switch (Size) {
938  default: break;
939  case 1: Directive = MAI->getData8bitsDirective(); break;
940  case 2: Directive = MAI->getData16bitsDirective(); break;
941  case 4: Directive = MAI->getData32bitsDirective(); break;
942  case 8: Directive = MAI->getData64bitsDirective(); break;
943  }
944 
945  if (!Directive) {
946  int64_t IntValue;
947  if (!Value->evaluateAsAbsolute(IntValue))
948  report_fatal_error("Don't know how to emit this value.");
949 
950  // We couldn't handle the requested integer size so we fallback by breaking
951  // the request down into several, smaller, integers.
952  // Since sizes greater or equal to "Size" are invalid, we use the greatest
953  // power of 2 that is less than "Size" as our largest piece of granularity.
954  bool IsLittleEndian = MAI->isLittleEndian();
955  for (unsigned Emitted = 0; Emitted != Size;) {
956  unsigned Remaining = Size - Emitted;
957  // The size of our partial emission must be a power of two less than
958  // Size.
959  unsigned EmissionSize = PowerOf2Floor(std::min(Remaining, Size - 1));
960  // Calculate the byte offset of our partial emission taking into account
961  // the endianness of the target.
962  unsigned ByteOffset =
963  IsLittleEndian ? Emitted : (Remaining - EmissionSize);
964  uint64_t ValueToEmit = IntValue >> (ByteOffset * 8);
965  // We truncate our partial emission to fit within the bounds of the
966  // emission domain. This produces nicer output and silences potential
967  // truncation warnings when round tripping through another assembler.
968  uint64_t Shift = 64 - EmissionSize * 8;
969  assert(Shift < static_cast<uint64_t>(
970  std::numeric_limits<unsigned long long>::digits) &&
971  "undefined behavior");
972  ValueToEmit &= ~0ULL >> Shift;
973  EmitIntValue(ValueToEmit, EmissionSize);
974  Emitted += EmissionSize;
975  }
976  return;
977  }
978 
979  assert(Directive && "Invalid size for machine code value!");
980  OS << Directive;
981  if (MCTargetStreamer *TS = getTargetStreamer()) {
982  TS->emitValue(Value);
983  } else {
984  Value->print(OS, MAI);
985  EmitEOL();
986  }
987 }
988 
989 void MCAsmStreamer::EmitULEB128Value(const MCExpr *Value) {
990  int64_t IntValue;
991  if (Value->evaluateAsAbsolute(IntValue)) {
992  EmitULEB128IntValue(IntValue);
993  return;
994  }
995  OS << "\t.uleb128 ";
996  Value->print(OS, MAI);
997  EmitEOL();
998 }
999 
1000 void MCAsmStreamer::EmitSLEB128Value(const MCExpr *Value) {
1001  int64_t IntValue;
1002  if (Value->evaluateAsAbsolute(IntValue)) {
1003  EmitSLEB128IntValue(IntValue);
1004  return;
1005  }
1006  OS << "\t.sleb128 ";
1007  Value->print(OS, MAI);
1008  EmitEOL();
1009 }
1010 
1011 void MCAsmStreamer::EmitDTPRel64Value(const MCExpr *Value) {
1012  assert(MAI->getDTPRel64Directive() != nullptr);
1013  OS << MAI->getDTPRel64Directive();
1014  Value->print(OS, MAI);
1015  EmitEOL();
1016 }
1017 
1018 void MCAsmStreamer::EmitDTPRel32Value(const MCExpr *Value) {
1019  assert(MAI->getDTPRel32Directive() != nullptr);
1020  OS << MAI->getDTPRel32Directive();
1021  Value->print(OS, MAI);
1022  EmitEOL();
1023 }
1024 
1025 void MCAsmStreamer::EmitTPRel64Value(const MCExpr *Value) {
1026  assert(MAI->getTPRel64Directive() != nullptr);
1027  OS << MAI->getTPRel64Directive();
1028  Value->print(OS, MAI);
1029  EmitEOL();
1030 }
1031 
1032 void MCAsmStreamer::EmitTPRel32Value(const MCExpr *Value) {
1033  assert(MAI->getTPRel32Directive() != nullptr);
1034  OS << MAI->getTPRel32Directive();
1035  Value->print(OS, MAI);
1036  EmitEOL();
1037 }
1038 
1039 void MCAsmStreamer::EmitGPRel64Value(const MCExpr *Value) {
1040  assert(MAI->getGPRel64Directive() != nullptr);
1041  OS << MAI->getGPRel64Directive();
1042  Value->print(OS, MAI);
1043  EmitEOL();
1044 }
1045 
1046 void MCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) {
1047  assert(MAI->getGPRel32Directive() != nullptr);
1048  OS << MAI->getGPRel32Directive();
1049  Value->print(OS, MAI);
1050  EmitEOL();
1051 }
1052 
1053 void MCAsmStreamer::emitFill(const MCExpr &NumBytes, uint64_t FillValue,
1054  SMLoc Loc) {
1055  int64_t IntNumBytes;
1056  if (NumBytes.evaluateAsAbsolute(IntNumBytes) && IntNumBytes == 0)
1057  return;
1058 
1059  if (const char *ZeroDirective = MAI->getZeroDirective()) {
1060  // FIXME: Emit location directives
1061  OS << ZeroDirective;
1062  NumBytes.print(OS, MAI);
1063  if (FillValue != 0)
1064  OS << ',' << (int)FillValue;
1065  EmitEOL();
1066  return;
1067  }
1068 
1069  MCStreamer::emitFill(NumBytes, FillValue);
1070 }
1071 
1072 void MCAsmStreamer::emitFill(const MCExpr &NumValues, int64_t Size,
1073  int64_t Expr, SMLoc Loc) {
1074  // FIXME: Emit location directives
1075  OS << "\t.fill\t";
1076  NumValues.print(OS, MAI);
1077  OS << ", " << Size << ", 0x";
1078  OS.write_hex(truncateToSize(Expr, 4));
1079  EmitEOL();
1080 }
1081 
1082 void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
1083  unsigned ValueSize,
1084  unsigned MaxBytesToEmit) {
1085  // Some assemblers don't support non-power of two alignments, so we always
1086  // emit alignments as a power of two if possible.
1087  if (isPowerOf2_32(ByteAlignment)) {
1088  switch (ValueSize) {
1089  default:
1090  llvm_unreachable("Invalid size for machine code value!");
1091  case 1:
1092  OS << "\t.p2align\t";
1093  break;
1094  case 2:
1095  OS << ".p2alignw ";
1096  break;
1097  case 4:
1098  OS << ".p2alignl ";
1099  break;
1100  case 8:
1101  llvm_unreachable("Unsupported alignment size!");
1102  }
1103 
1104  OS << Log2_32(ByteAlignment);
1105 
1106  if (Value || MaxBytesToEmit) {
1107  OS << ", 0x";
1108  OS.write_hex(truncateToSize(Value, ValueSize));
1109 
1110  if (MaxBytesToEmit)
1111  OS << ", " << MaxBytesToEmit;
1112  }
1113  EmitEOL();
1114  return;
1115  }
1116 
1117  // Non-power of two alignment. This is not widely supported by assemblers.
1118  // FIXME: Parameterize this based on MAI.
1119  switch (ValueSize) {
1120  default: llvm_unreachable("Invalid size for machine code value!");
1121  case 1: OS << ".balign"; break;
1122  case 2: OS << ".balignw"; break;
1123  case 4: OS << ".balignl"; break;
1124  case 8: llvm_unreachable("Unsupported alignment size!");
1125  }
1126 
1127  OS << ' ' << ByteAlignment;
1128  OS << ", " << truncateToSize(Value, ValueSize);
1129  if (MaxBytesToEmit)
1130  OS << ", " << MaxBytesToEmit;
1131  EmitEOL();
1132 }
1133 
1134 void MCAsmStreamer::EmitCodeAlignment(unsigned ByteAlignment,
1135  unsigned MaxBytesToEmit) {
1136  // Emit with a text fill value.
1137  EmitValueToAlignment(ByteAlignment, MAI->getTextAlignFillValue(),
1138  1, MaxBytesToEmit);
1139 }
1140 
1141 void MCAsmStreamer::emitValueToOffset(const MCExpr *Offset,
1142  unsigned char Value,
1143  SMLoc Loc) {
1144  // FIXME: Verify that Offset is associated with the current section.
1145  OS << ".org ";
1146  Offset->print(OS, MAI);
1147  OS << ", " << (unsigned)Value;
1148  EmitEOL();
1149 }
1150 
1151 void MCAsmStreamer::EmitFileDirective(StringRef Filename) {
1153  OS << "\t.file\t";
1154  PrintQuotedString(Filename, OS);
1155  EmitEOL();
1156 }
1157 
1158 static void printDwarfFileDirective(unsigned FileNo, StringRef Directory,
1159  StringRef Filename,
1160  Optional<MD5::MD5Result> Checksum,
1162  bool UseDwarfDirectory,
1163  raw_svector_ostream &OS) {
1164  SmallString<128> FullPathName;
1165 
1166  if (!UseDwarfDirectory && !Directory.empty()) {
1167  if (sys::path::is_absolute(Filename))
1168  Directory = "";
1169  else {
1170  FullPathName = Directory;
1171  sys::path::append(FullPathName, Filename);
1172  Directory = "";
1173  Filename = FullPathName;
1174  }
1175  }
1176 
1177  OS << "\t.file\t" << FileNo << ' ';
1178  if (!Directory.empty()) {
1179  PrintQuotedString(Directory, OS);
1180  OS << ' ';
1181  }
1182  PrintQuotedString(Filename, OS);
1183  if (Checksum)
1184  OS << " md5 0x" << Checksum->digest();
1185  if (Source) {
1186  OS << " source ";
1187  PrintQuotedString(*Source, OS);
1188  }
1189 }
1190 
1191 Expected<unsigned> MCAsmStreamer::tryEmitDwarfFileDirective(
1192  unsigned FileNo, StringRef Directory, StringRef Filename,
1193  Optional<MD5::MD5Result> Checksum, Optional<StringRef> Source, unsigned CUID) {
1194  assert(CUID == 0 && "multiple CUs not supported by MCAsmStreamer");
1195 
1196  MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
1197  unsigned NumFiles = Table.getMCDwarfFiles().size();
1198  Expected<unsigned> FileNoOrErr =
1199  Table.tryGetFile(Directory, Filename, Checksum, Source,
1200  getContext().getDwarfVersion(), FileNo);
1201  if (!FileNoOrErr)
1202  return FileNoOrErr.takeError();
1203  FileNo = FileNoOrErr.get();
1204  if (NumFiles == Table.getMCDwarfFiles().size())
1205  return FileNo;
1206 
1207  SmallString<128> Str;
1208  raw_svector_ostream OS1(Str);
1209  printDwarfFileDirective(FileNo, Directory, Filename, Checksum, Source,
1210  UseDwarfDirectory, OS1);
1211 
1212  if (MCTargetStreamer *TS = getTargetStreamer())
1213  TS->emitDwarfFileDirective(OS1.str());
1214  else
1215  EmitRawText(OS1.str());
1216 
1217  return FileNo;
1218 }
1219 
1220 void MCAsmStreamer::emitDwarfFile0Directive(StringRef Directory,
1221  StringRef Filename,
1222  Optional<MD5::MD5Result> Checksum,
1223  Optional<StringRef> Source,
1224  unsigned CUID) {
1225  assert(CUID == 0);
1226  // .file 0 is new for DWARF v5.
1227  if (getContext().getDwarfVersion() < 5)
1228  return;
1229  // Inform MCDwarf about the root file.
1230  getContext().setMCLineTableRootFile(CUID, Directory, Filename, Checksum,
1231  Source);
1232 
1233  SmallString<128> Str;
1234  raw_svector_ostream OS1(Str);
1235  printDwarfFileDirective(0, Directory, Filename, Checksum, Source,
1236  UseDwarfDirectory, OS1);
1237 
1238  if (MCTargetStreamer *TS = getTargetStreamer())
1239  TS->emitDwarfFileDirective(OS1.str());
1240  else
1241  EmitRawText(OS1.str());
1242 }
1243 
1244 void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
1245  unsigned Column, unsigned Flags,
1246  unsigned Isa,
1247  unsigned Discriminator,
1248  StringRef FileName) {
1249  OS << "\t.loc\t" << FileNo << " " << Line << " " << Column;
1250  if (MAI->supportsExtendedDwarfLocDirective()) {
1251  if (Flags & DWARF2_FLAG_BASIC_BLOCK)
1252  OS << " basic_block";
1253  if (Flags & DWARF2_FLAG_PROLOGUE_END)
1254  OS << " prologue_end";
1255  if (Flags & DWARF2_FLAG_EPILOGUE_BEGIN)
1256  OS << " epilogue_begin";
1257 
1258  unsigned OldFlags = getContext().getCurrentDwarfLoc().getFlags();
1259  if ((Flags & DWARF2_FLAG_IS_STMT) != (OldFlags & DWARF2_FLAG_IS_STMT)) {
1260  OS << " is_stmt ";
1261 
1262  if (Flags & DWARF2_FLAG_IS_STMT)
1263  OS << "1";
1264  else
1265  OS << "0";
1266  }
1267 
1268  if (Isa)
1269  OS << " isa " << Isa;
1270  if (Discriminator)
1271  OS << " discriminator " << Discriminator;
1272  }
1273 
1274  if (IsVerboseAsm) {
1275  OS.PadToColumn(MAI->getCommentColumn());
1276  OS << MAI->getCommentString() << ' ' << FileName << ':'
1277  << Line << ':' << Column;
1278  }
1279  EmitEOL();
1280  this->MCStreamer::EmitDwarfLocDirective(FileNo, Line, Column, Flags,
1281  Isa, Discriminator, FileName);
1282 }
1283 
1284 MCSymbol *MCAsmStreamer::getDwarfLineTableSymbol(unsigned CUID) {
1285  // Always use the zeroth line table, since asm syntax only supports one line
1286  // table for now.
1288 }
1289 
1290 bool MCAsmStreamer::EmitCVFileDirective(unsigned FileNo, StringRef Filename,
1291  ArrayRef<uint8_t> Checksum,
1292  unsigned ChecksumKind) {
1293  if (!getContext().getCVContext().addFile(*this, FileNo, Filename, Checksum,
1294  ChecksumKind))
1295  return false;
1296 
1297  OS << "\t.cv_file\t" << FileNo << ' ';
1298  PrintQuotedString(Filename, OS);
1299 
1300  if (!ChecksumKind) {
1301  EmitEOL();
1302  return true;
1303  }
1304 
1305  OS << ' ';
1306  PrintQuotedString(toHex(Checksum), OS);
1307  OS << ' ' << ChecksumKind;
1308 
1309  EmitEOL();
1310  return true;
1311 }
1312 
1313 bool MCAsmStreamer::EmitCVFuncIdDirective(unsigned FuncId) {
1314  OS << "\t.cv_func_id " << FuncId << '\n';
1315  return MCStreamer::EmitCVFuncIdDirective(FuncId);
1316 }
1317 
1318 bool MCAsmStreamer::EmitCVInlineSiteIdDirective(unsigned FunctionId,
1319  unsigned IAFunc,
1320  unsigned IAFile,
1321  unsigned IALine, unsigned IACol,
1322  SMLoc Loc) {
1323  OS << "\t.cv_inline_site_id " << FunctionId << " within " << IAFunc
1324  << " inlined_at " << IAFile << ' ' << IALine << ' ' << IACol << '\n';
1325  return MCStreamer::EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
1326  IALine, IACol, Loc);
1327 }
1328 
1329 void MCAsmStreamer::EmitCVLocDirective(unsigned FunctionId, unsigned FileNo,
1330  unsigned Line, unsigned Column,
1331  bool PrologueEnd, bool IsStmt,
1332  StringRef FileName, SMLoc Loc) {
1333  // Validate the directive.
1334  if (!checkCVLocSection(FunctionId, FileNo, Loc))
1335  return;
1336 
1337  OS << "\t.cv_loc\t" << FunctionId << " " << FileNo << " " << Line << " "
1338  << Column;
1339  if (PrologueEnd)
1340  OS << " prologue_end";
1341 
1342  if (IsStmt)
1343  OS << " is_stmt 1";
1344 
1345  if (IsVerboseAsm) {
1346  OS.PadToColumn(MAI->getCommentColumn());
1347  OS << MAI->getCommentString() << ' ' << FileName << ':' << Line << ':'
1348  << Column;
1349  }
1350  EmitEOL();
1351 }
1352 
1353 void MCAsmStreamer::EmitCVLinetableDirective(unsigned FunctionId,
1354  const MCSymbol *FnStart,
1355  const MCSymbol *FnEnd) {
1356  OS << "\t.cv_linetable\t" << FunctionId << ", ";
1357  FnStart->print(OS, MAI);
1358  OS << ", ";
1359  FnEnd->print(OS, MAI);
1360  EmitEOL();
1361  this->MCStreamer::EmitCVLinetableDirective(FunctionId, FnStart, FnEnd);
1362 }
1363 
1364 void MCAsmStreamer::EmitCVInlineLinetableDirective(unsigned PrimaryFunctionId,
1365  unsigned SourceFileId,
1366  unsigned SourceLineNum,
1367  const MCSymbol *FnStartSym,
1368  const MCSymbol *FnEndSym) {
1369  OS << "\t.cv_inline_linetable\t" << PrimaryFunctionId << ' ' << SourceFileId
1370  << ' ' << SourceLineNum << ' ';
1371  FnStartSym->print(OS, MAI);
1372  OS << ' ';
1373  FnEndSym->print(OS, MAI);
1374  EmitEOL();
1376  PrimaryFunctionId, SourceFileId, SourceLineNum, FnStartSym, FnEndSym);
1377 }
1378 
1379 void MCAsmStreamer::EmitCVDefRangeDirective(
1380  ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
1381  StringRef FixedSizePortion) {
1382  OS << "\t.cv_def_range\t";
1383  for (std::pair<const MCSymbol *, const MCSymbol *> Range : Ranges) {
1384  OS << ' ';
1385  Range.first->print(OS, MAI);
1386  OS << ' ';
1387  Range.second->print(OS, MAI);
1388  }
1389  OS << ", ";
1390  PrintQuotedString(FixedSizePortion, OS);
1391  EmitEOL();
1392  this->MCStreamer::EmitCVDefRangeDirective(Ranges, FixedSizePortion);
1393 }
1394 
1395 void MCAsmStreamer::EmitCVStringTableDirective() {
1396  OS << "\t.cv_stringtable";
1397  EmitEOL();
1398 }
1399 
1400 void MCAsmStreamer::EmitCVFileChecksumsDirective() {
1401  OS << "\t.cv_filechecksums";
1402  EmitEOL();
1403 }
1404 
1405 void MCAsmStreamer::EmitCVFileChecksumOffsetDirective(unsigned FileNo) {
1406  OS << "\t.cv_filechecksumoffset\t" << FileNo;
1407  EmitEOL();
1408 }
1409 
1410 void MCAsmStreamer::EmitCVFPOData(const MCSymbol *ProcSym, SMLoc L) {
1411  OS << "\t.cv_fpo_data\t";
1412  ProcSym->print(OS, MAI);
1413  EmitEOL();
1414 }
1415 
1416 void MCAsmStreamer::EmitIdent(StringRef IdentString) {
1417  assert(MAI->hasIdentDirective() && ".ident directive not supported");
1418  OS << "\t.ident\t";
1419  PrintQuotedString(IdentString, OS);
1420  EmitEOL();
1421 }
1422 
1423 void MCAsmStreamer::EmitCFISections(bool EH, bool Debug) {
1424  MCStreamer::EmitCFISections(EH, Debug);
1425  OS << "\t.cfi_sections ";
1426  if (EH) {
1427  OS << ".eh_frame";
1428  if (Debug)
1429  OS << ", .debug_frame";
1430  } else if (Debug) {
1431  OS << ".debug_frame";
1432  }
1433 
1434  EmitEOL();
1435 }
1436 
1437 void MCAsmStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
1438  OS << "\t.cfi_startproc";
1439  if (Frame.IsSimple)
1440  OS << " simple";
1441  EmitEOL();
1442 }
1443 
1444 void MCAsmStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
1446  OS << "\t.cfi_endproc";
1447  EmitEOL();
1448 }
1449 
1450 void MCAsmStreamer::EmitRegisterName(int64_t Register) {
1451  if (!MAI->useDwarfRegNumForCFI()) {
1452  // User .cfi_* directives can use arbitrary DWARF register numbers, not
1453  // just ones that map to LLVM register numbers and have known names.
1454  // Fall back to using the original number directly if no name is known.
1455  const MCRegisterInfo *MRI = getContext().getRegisterInfo();
1456  int LLVMRegister = MRI->getLLVMRegNumFromEH(Register);
1457  if (LLVMRegister != -1) {
1458  InstPrinter->printRegName(OS, LLVMRegister);
1459  return;
1460  }
1461  }
1462  OS << Register;
1463 }
1464 
1465 void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
1466  MCStreamer::EmitCFIDefCfa(Register, Offset);
1467  OS << "\t.cfi_def_cfa ";
1468  EmitRegisterName(Register);
1469  OS << ", " << Offset;
1470  EmitEOL();
1471 }
1472 
1473 void MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
1475  OS << "\t.cfi_def_cfa_offset " << Offset;
1476  EmitEOL();
1477 }
1478 
1480  OS << "\t.cfi_escape ";
1481  if (!Values.empty()) {
1482  size_t e = Values.size() - 1;
1483  for (size_t i = 0; i < e; ++i)
1484  OS << format("0x%02x", uint8_t(Values[i])) << ", ";
1485  OS << format("0x%02x", uint8_t(Values[e]));
1486  }
1487 }
1488 
1489 void MCAsmStreamer::EmitCFIEscape(StringRef Values) {
1490  MCStreamer::EmitCFIEscape(Values);
1491  PrintCFIEscape(OS, Values);
1492  EmitEOL();
1493 }
1494 
1495 void MCAsmStreamer::EmitCFIGnuArgsSize(int64_t Size) {
1497 
1498  uint8_t Buffer[16] = { dwarf::DW_CFA_GNU_args_size };
1499  unsigned Len = encodeULEB128(Size, Buffer + 1) + 1;
1500 
1501  PrintCFIEscape(OS, StringRef((const char *)&Buffer[0], Len));
1502  EmitEOL();
1503 }
1504 
1505 void MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) {
1507  OS << "\t.cfi_def_cfa_register ";
1508  EmitRegisterName(Register);
1509  EmitEOL();
1510 }
1511 
1512 void MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
1513  this->MCStreamer::EmitCFIOffset(Register, Offset);
1514  OS << "\t.cfi_offset ";
1515  EmitRegisterName(Register);
1516  OS << ", " << Offset;
1517  EmitEOL();
1518 }
1519 
1520 void MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym,
1521  unsigned Encoding) {
1522  MCStreamer::EmitCFIPersonality(Sym, Encoding);
1523  OS << "\t.cfi_personality " << Encoding << ", ";
1524  Sym->print(OS, MAI);
1525  EmitEOL();
1526 }
1527 
1528 void MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
1529  MCStreamer::EmitCFILsda(Sym, Encoding);
1530  OS << "\t.cfi_lsda " << Encoding << ", ";
1531  Sym->print(OS, MAI);
1532  EmitEOL();
1533 }
1534 
1535 void MCAsmStreamer::EmitCFIRememberState() {
1537  OS << "\t.cfi_remember_state";
1538  EmitEOL();
1539 }
1540 
1541 void MCAsmStreamer::EmitCFIRestoreState() {
1543  OS << "\t.cfi_restore_state";
1544  EmitEOL();
1545 }
1546 
1547 void MCAsmStreamer::EmitCFIRestore(int64_t Register) {
1548  MCStreamer::EmitCFIRestore(Register);
1549  OS << "\t.cfi_restore ";
1550  EmitRegisterName(Register);
1551  EmitEOL();
1552 }
1553 
1554 void MCAsmStreamer::EmitCFISameValue(int64_t Register) {
1555  MCStreamer::EmitCFISameValue(Register);
1556  OS << "\t.cfi_same_value ";
1557  EmitRegisterName(Register);
1558  EmitEOL();
1559 }
1560 
1561 void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
1562  MCStreamer::EmitCFIRelOffset(Register, Offset);
1563  OS << "\t.cfi_rel_offset ";
1564  EmitRegisterName(Register);
1565  OS << ", " << Offset;
1566  EmitEOL();
1567 }
1568 
1569 void MCAsmStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
1571  OS << "\t.cfi_adjust_cfa_offset " << Adjustment;
1572  EmitEOL();
1573 }
1574 
1575 void MCAsmStreamer::EmitCFISignalFrame() {
1577  OS << "\t.cfi_signal_frame";
1578  EmitEOL();
1579 }
1580 
1581 void MCAsmStreamer::EmitCFIUndefined(int64_t Register) {
1582  MCStreamer::EmitCFIUndefined(Register);
1583  OS << "\t.cfi_undefined " << Register;
1584  EmitEOL();
1585 }
1586 
1587 void MCAsmStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
1588  MCStreamer::EmitCFIRegister(Register1, Register2);
1589  OS << "\t.cfi_register " << Register1 << ", " << Register2;
1590  EmitEOL();
1591 }
1592 
1593 void MCAsmStreamer::EmitCFIWindowSave() {
1595  OS << "\t.cfi_window_save";
1596  EmitEOL();
1597 }
1598 
1599 void MCAsmStreamer::EmitCFINegateRAState() {
1601  OS << "\t.cfi_negate_ra_state";
1602  EmitEOL();
1603 }
1604 
1605 void MCAsmStreamer::EmitCFIReturnColumn(int64_t Register) {
1607  OS << "\t.cfi_return_column " << Register;
1608  EmitEOL();
1609 }
1610 
1611 void MCAsmStreamer::EmitCFIBKeyFrame() {
1613  OS << "\t.cfi_b_key_frame";
1614  EmitEOL();
1615 }
1616 
1617 void MCAsmStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol, SMLoc Loc) {
1618  MCStreamer::EmitWinCFIStartProc(Symbol, Loc);
1619 
1620  OS << ".seh_proc ";
1621  Symbol->print(OS, MAI);
1622  EmitEOL();
1623 }
1624 
1625 void MCAsmStreamer::EmitWinCFIEndProc(SMLoc Loc) {
1627 
1628  OS << "\t.seh_endproc";
1629  EmitEOL();
1630 }
1631 
1632 // TODO: Implement
1633 void MCAsmStreamer::EmitWinCFIFuncletOrFuncEnd(SMLoc Loc) {
1634 }
1635 
1636 void MCAsmStreamer::EmitWinCFIStartChained(SMLoc Loc) {
1638 
1639  OS << "\t.seh_startchained";
1640  EmitEOL();
1641 }
1642 
1643 void MCAsmStreamer::EmitWinCFIEndChained(SMLoc Loc) {
1645 
1646  OS << "\t.seh_endchained";
1647  EmitEOL();
1648 }
1649 
1650 void MCAsmStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
1651  bool Except, SMLoc Loc) {
1652  MCStreamer::EmitWinEHHandler(Sym, Unwind, Except, Loc);
1653 
1654  OS << "\t.seh_handler ";
1655  Sym->print(OS, MAI);
1656  if (Unwind)
1657  OS << ", @unwind";
1658  if (Except)
1659  OS << ", @except";
1660  EmitEOL();
1661 }
1662 
1663 void MCAsmStreamer::EmitWinEHHandlerData(SMLoc Loc) {
1665 
1666  // Switch sections. Don't call SwitchSection directly, because that will
1667  // cause the section switch to be visible in the emitted assembly.
1668  // We only do this so the section switch that terminates the handler
1669  // data block is visible.
1670  WinEH::FrameInfo *CurFrame = getCurrentWinFrameInfo();
1671  MCSection *TextSec = &CurFrame->Function->getSection();
1672  MCSection *XData = getAssociatedXDataSection(TextSec);
1673  SwitchSectionNoChange(XData);
1674 
1675  OS << "\t.seh_handlerdata";
1676  EmitEOL();
1677 }
1678 
1679 void MCAsmStreamer::EmitWinCFIPushReg(unsigned Register, SMLoc Loc) {
1680  MCStreamer::EmitWinCFIPushReg(Register, Loc);
1681 
1682  OS << "\t.seh_pushreg " << Register;
1683  EmitEOL();
1684 }
1685 
1686 void MCAsmStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset,
1687  SMLoc Loc) {
1688  MCStreamer::EmitWinCFISetFrame(Register, Offset, Loc);
1689 
1690  OS << "\t.seh_setframe " << Register << ", " << Offset;
1691  EmitEOL();
1692 }
1693 
1694 void MCAsmStreamer::EmitWinCFIAllocStack(unsigned Size, SMLoc Loc) {
1696 
1697  OS << "\t.seh_stackalloc " << Size;
1698  EmitEOL();
1699 }
1700 
1701 void MCAsmStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset,
1702  SMLoc Loc) {
1703  MCStreamer::EmitWinCFISaveReg(Register, Offset, Loc);
1704 
1705  OS << "\t.seh_savereg " << Register << ", " << Offset;
1706  EmitEOL();
1707 }
1708 
1709 void MCAsmStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset,
1710  SMLoc Loc) {
1711  MCStreamer::EmitWinCFISaveXMM(Register, Offset, Loc);
1712 
1713  OS << "\t.seh_savexmm " << Register << ", " << Offset;
1714  EmitEOL();
1715 }
1716 
1717 void MCAsmStreamer::EmitWinCFIPushFrame(bool Code, SMLoc Loc) {
1719 
1720  OS << "\t.seh_pushframe";
1721  if (Code)
1722  OS << " @code";
1723  EmitEOL();
1724 }
1725 
1726 void MCAsmStreamer::EmitWinCFIEndProlog(SMLoc Loc) {
1728 
1729  OS << "\t.seh_endprologue";
1730  EmitEOL();
1731 }
1732 
1733 void MCAsmStreamer::emitCGProfileEntry(const MCSymbolRefExpr *From,
1734  const MCSymbolRefExpr *To,
1735  uint64_t Count) {
1736  OS << "\t.cg_profile ";
1737  From->getSymbol().print(OS, MAI);
1738  OS << ", ";
1739  To->getSymbol().print(OS, MAI);
1740  OS << ", " << Count;
1741  EmitEOL();
1742 }
1743 
1744 void MCAsmStreamer::AddEncodingComment(const MCInst &Inst,
1745  const MCSubtargetInfo &STI) {
1746  raw_ostream &OS = GetCommentOS();
1747  SmallString<256> Code;
1749  raw_svector_ostream VecOS(Code);
1750 
1751  // If we have no code emitter, don't emit code.
1752  if (!getAssembler().getEmitterPtr())
1753  return;
1754 
1755  getAssembler().getEmitter().encodeInstruction(Inst, VecOS, Fixups, STI);
1756 
1757  // If we are showing fixups, create symbolic markers in the encoded
1758  // representation. We do this by making a per-bit map to the fixup item index,
1759  // then trying to display it as nicely as possible.
1760  SmallVector<uint8_t, 64> FixupMap;
1761  FixupMap.resize(Code.size() * 8);
1762  for (unsigned i = 0, e = Code.size() * 8; i != e; ++i)
1763  FixupMap[i] = 0;
1764 
1765  for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
1766  MCFixup &F = Fixups[i];
1767  const MCFixupKindInfo &Info =
1768  getAssembler().getBackend().getFixupKindInfo(F.getKind());
1769  for (unsigned j = 0; j != Info.TargetSize; ++j) {
1770  unsigned Index = F.getOffset() * 8 + Info.TargetOffset + j;
1771  assert(Index < Code.size() * 8 && "Invalid offset in fixup!");
1772  FixupMap[Index] = 1 + i;
1773  }
1774  }
1775 
1776  // FIXME: Note the fixup comments for Thumb2 are completely bogus since the
1777  // high order halfword of a 32-bit Thumb2 instruction is emitted first.
1778  OS << "encoding: [";
1779  for (unsigned i = 0, e = Code.size(); i != e; ++i) {
1780  if (i)
1781  OS << ',';
1782 
1783  // See if all bits are the same map entry.
1784  uint8_t MapEntry = FixupMap[i * 8 + 0];
1785  for (unsigned j = 1; j != 8; ++j) {
1786  if (FixupMap[i * 8 + j] == MapEntry)
1787  continue;
1788 
1789  MapEntry = uint8_t(~0U);
1790  break;
1791  }
1792 
1793  if (MapEntry != uint8_t(~0U)) {
1794  if (MapEntry == 0) {
1795  OS << format("0x%02x", uint8_t(Code[i]));
1796  } else {
1797  if (Code[i]) {
1798  // FIXME: Some of the 8 bits require fix up.
1799  OS << format("0x%02x", uint8_t(Code[i])) << '\''
1800  << char('A' + MapEntry - 1) << '\'';
1801  } else
1802  OS << char('A' + MapEntry - 1);
1803  }
1804  } else {
1805  // Otherwise, write out in binary.
1806  OS << "0b";
1807  for (unsigned j = 8; j--;) {
1808  unsigned Bit = (Code[i] >> j) & 1;
1809 
1810  unsigned FixupBit;
1811  if (MAI->isLittleEndian())
1812  FixupBit = i * 8 + j;
1813  else
1814  FixupBit = i * 8 + (7-j);
1815 
1816  if (uint8_t MapEntry = FixupMap[FixupBit]) {
1817  assert(Bit == 0 && "Encoder wrote into fixed up bit!");
1818  OS << char('A' + MapEntry - 1);
1819  } else
1820  OS << Bit;
1821  }
1822  }
1823  }
1824  OS << "]\n";
1825 
1826  for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
1827  MCFixup &F = Fixups[i];
1828  const MCFixupKindInfo &Info =
1829  getAssembler().getBackend().getFixupKindInfo(F.getKind());
1830  OS << " fixup " << char('A' + i) << " - " << "offset: " << F.getOffset()
1831  << ", value: " << *F.getValue() << ", kind: " << Info.Name << "\n";
1832  }
1833 }
1834 
1835 void MCAsmStreamer::EmitInstruction(const MCInst &Inst,
1836  const MCSubtargetInfo &STI) {
1837  assert(getCurrentSectionOnly() &&
1838  "Cannot emit contents before setting section!");
1839 
1840  // Show the encoding in a comment if we have a code emitter.
1841  AddEncodingComment(Inst, STI);
1842 
1843  // Show the MCInst if enabled.
1844  if (ShowInst) {
1845  Inst.dump_pretty(GetCommentOS(), InstPrinter.get(), "\n ");
1846  GetCommentOS() << "\n";
1847  }
1848 
1849  if(getTargetStreamer())
1850  getTargetStreamer()->prettyPrintAsm(*InstPrinter, OS, Inst, STI);
1851  else
1852  InstPrinter->printInst(&Inst, OS, "", STI);
1853 
1854  StringRef Comments = CommentToEmit;
1855  if (Comments.size() && Comments.back() != '\n')
1856  GetCommentOS() << "\n";
1857 
1858  EmitEOL();
1859 }
1860 
1861 void MCAsmStreamer::EmitBundleAlignMode(unsigned AlignPow2) {
1862  OS << "\t.bundle_align_mode " << AlignPow2;
1863  EmitEOL();
1864 }
1865 
1866 void MCAsmStreamer::EmitBundleLock(bool AlignToEnd) {
1867  OS << "\t.bundle_lock";
1868  if (AlignToEnd)
1869  OS << " align_to_end";
1870  EmitEOL();
1871 }
1872 
1873 void MCAsmStreamer::EmitBundleUnlock() {
1874  OS << "\t.bundle_unlock";
1875  EmitEOL();
1876 }
1877 
1878 bool MCAsmStreamer::EmitRelocDirective(const MCExpr &Offset, StringRef Name,
1879  const MCExpr *Expr, SMLoc,
1880  const MCSubtargetInfo &STI) {
1881  OS << "\t.reloc ";
1882  Offset.print(OS, MAI);
1883  OS << ", " << Name;
1884  if (Expr) {
1885  OS << ", ";
1886  Expr->print(OS, MAI);
1887  }
1888  EmitEOL();
1889  return false;
1890 }
1891 
1892 void MCAsmStreamer::EmitAddrsig() {
1893  OS << "\t.addrsig";
1894  EmitEOL();
1895 }
1896 
1897 void MCAsmStreamer::EmitAddrsigSym(const MCSymbol *Sym) {
1898  OS << "\t.addrsig_sym ";
1899  Sym->print(OS, MAI);
1900  EmitEOL();
1901 }
1902 
1903 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
1904 /// the specified string in the output .s file. This capability is
1905 /// indicated by the hasRawTextSupport() predicate.
1906 void MCAsmStreamer::EmitRawTextImpl(StringRef String) {
1907  if (!String.empty() && String.back() == '\n')
1908  String = String.substr(0, String.size()-1);
1909  OS << String;
1910  EmitEOL();
1911 }
1912 
1913 void MCAsmStreamer::FinishImpl() {
1914  // If we are generating dwarf for assembly source files dump out the sections.
1915  if (getContext().getGenDwarfForAssembly())
1916  MCGenDwarfInfo::Emit(this);
1917 
1918  // Emit the label for the line table, if requested - since the rest of the
1919  // line table will be defined by .loc/.file directives, and not emitted
1920  // directly, the label is the only work required here.
1921  const auto &Tables = getContext().getMCDwarfLineTables();
1922  if (!Tables.empty()) {
1923  assert(Tables.size() == 1 && "asm output only supports one line table");
1924  if (auto *Label = Tables.begin()->second.getLabel()) {
1925  SwitchSection(getContext().getObjectFileInfo()->getDwarfLineSection());
1926  EmitLabel(Label);
1927  }
1928  }
1929 }
1930 
1932  std::unique_ptr<formatted_raw_ostream> OS,
1933  bool isVerboseAsm, bool useDwarfDirectory,
1934  MCInstPrinter *IP,
1935  std::unique_ptr<MCCodeEmitter> &&CE,
1936  std::unique_ptr<MCAsmBackend> &&MAB,
1937  bool ShowInst) {
1938  return new MCAsmStreamer(Context, std::move(OS), isVerboseAsm,
1939  useDwarfDirectory, IP, std::move(CE), std::move(MAB),
1940  ShowInst);
1941 }
bool doesSupportDataRegionDirectives() const
Definition: MCAsmInfo.h:519
bool getCOMMDirectiveAlignmentIsInBytes() const
Definition: MCAsmInfo.h:536
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:235
uint64_t CallInst * C
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:38
virtual void EmitCFISameValue(int64_t Register)
Definition: MCStreamer.cpp:515
const char * getLabelSuffix() const
Definition: MCAsmInfo.h:493
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:330
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang", "erlang-compatible garbage collector")
virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding)
Definition: MCStreamer.cpp:479
virtual void EmitWinCFIPushReg(unsigned Register, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:766
This represents a section on a Mach-O system (used by Mac OS X).
LLVM_NODISCARD std::string str() const
str - Get the contents as an std::string.
Definition: StringRef.h:218
virtual void EmitCFIGnuArgsSize(int64_t Size)
Definition: MCStreamer.cpp:544
LLVMContext & Context
bool isPrint(char C)
Checks whether character C is printable.
Definition: StringExtras.h:105
#define DWARF2_FLAG_PROLOGUE_END
Definition: MCDwarf.h:84
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
const char * getGlobalDirective() const
Definition: MCAsmInfo.h:528
.type _foo, STT_OBJECT # aka
Definition: MCDirectives.h:25
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
Not a valid directive.
Definition: MCDirectives.h:19
virtual void EmitWinCFIStartProc(const MCSymbol *Symbol, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:622
bool hasSingleParameterDotFile() const
Definition: MCAsmInfo.h:546
amdgpu Simplify well known AMD library false FunctionCallee Value const Twine & Name
formatted_raw_ostream - A raw_ostream that wraps another one and keeps track of line and column posit...
.watchos_version_min
Definition: MCDirectives.h:68
LLVM_NODISCARD bool startswith(StringRef Prefix) const
Check if this string starts with the given Prefix.
Definition: StringRef.h:256
A raw_ostream that discards all output.
Definition: raw_ostream.h:538
void push_back(const T &Elt)
Definition: SmallVector.h:211
virtual void EmitWinCFISaveXMM(unsigned Register, unsigned Offset, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:833
SmallString< 32 > digest() const
Definition: MD5.cpp:264
void dump_pretty(raw_ostream &OS, const MCInstPrinter *Printer=nullptr, StringRef Separator=" ") const
Dump the MCInst as prettily as possible using the additional MC structures, if given.
Definition: MCInst.cpp:72
Target specific streamer interface.
Definition: MCStreamer.h:83
.ios_version_min
Definition: MCDirectives.h:65
format_object< Ts... > format(const char *Fmt, const Ts &... Vals)
These are helper functions used to produce formatted output.
Definition: Format.h:123
const char * getCode16Directive() const
Definition: MCAsmInfo.h:512
bool hasDotTypeDotSizeDirective() const
Definition: MCAsmInfo.h:545
int getLLVMRegNumFromEH(unsigned RegNum) const
Map a DWARF EH register back to a target register (same as getLLVMRegNum(RegNum, true)) but return -1...
A raw_ostream that writes to an SmallVector or SmallString.
Definition: raw_ostream.h:509
const char * getData64bitsDirective() const
Definition: MCAsmInfo.h:417
virtual void EmitCFIRegister(int64_t Register1, int64_t Register2)
Definition: MCStreamer.cpp:571
F(f)
const char * getTPRel64Directive() const
Definition: MCAsmInfo.h:422
uint64_t alignTo(uint64_t Value, uint64_t Align, uint64_t Skew=0)
Returns the next integer (mod 2**64) that is greater than or equal to Value and is a multiple of Alig...
Definition: MathExtras.h:689
.macosx_version_min
Definition: MCDirectives.h:66
std::enable_if<!std::is_array< T >::value, std::unique_ptr< T > >::type make_unique(Args &&... args)
Constructs a new T() with the given args and returns a unique_ptr<T> which owns the object...
Definition: STLExtras.h:1405
MCDataRegionType
Definition: MCDirectives.h:56
Error takeError()
Take ownership of the stored error.
Definition: Error.h:552
virtual void EmitCFIDefCfaOffset(int64_t Offset)
Definition: MCStreamer.cpp:428
.type _foo, STT_NOTYPE # aka
Definition: MCDirectives.h:28
virtual MCSymbol * getDwarfLineTableSymbol(unsigned CUID)
Definition: MCStreamer.cpp:244
COFF::SymbolStorageClass StorageClass
Definition: COFFYAML.cpp:356
bool hasIdentDirective() const
Definition: MCAsmInfo.h:547
unsigned TargetOffset
The bit offset to write the relocation into.
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:74
virtual void EmitCFISections(bool EH, bool Debug)
Definition: MCStreamer.cpp:369
const char * getDTPRel64Directive() const
Definition: MCAsmInfo.h:420
static int64_t truncateToSize(int64_t Value, unsigned Bytes)
virtual void EmitCFIRememberState()
Definition: MCStreamer.cpp:496
.cold (MachO)
Definition: MCDirectives.h:22
void append(SmallVectorImpl< char > &path, const Twine &a, const Twine &b="", const Twine &c="", const Twine &d="")
Append to path.
Definition: Path.cpp:455
virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding)
Definition: MCStreamer.cpp:488
#define DWARF2_FLAG_IS_STMT
Definition: MCDwarf.h:82
Definition: BitVector.h:937
const char * getAscizDirective() const
Definition: MCAsmInfo.h:525
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:639
virtual void EmitCFIEscape(StringRef Values)
Definition: MCStreamer.cpp:535
const char * getZeroDirective() const
Definition: MCAsmInfo.h:523
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
Definition: APFloat.h:41
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
virtual void EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:688
bool is_absolute(const Twine &path, Style style=Style::native)
Is path absolute?
Definition: Path.cpp:663
const char * Name
A target specific name for the fixup kind.
.data_region jt16
Definition: MCDirectives.h:59
Represent a reference to a symbol from inside an expression.
Definition: MCExpr.h:173
LLVM_NODISCARD StringRef slice(size_t Start, size_t End) const
Return a reference to the substring from [Start, End).
Definition: StringRef.h:679
iterator_range< const unsigned char * > bytes() const
Definition: StringRef.h:111
.local (ELF)
Definition: MCDirectives.h:35
const char * getGPRel64Directive() const
Definition: MCAsmInfo.h:418
Tagged union holding either a T or a Error.
Definition: CachePruning.h:22
static void EmitSDKVersionSuffix(raw_ostream &OS, const VersionTuple &SDKVersion)
StringRef getSingleStringRef() const
This returns the twine as a single StringRef.
Definition: Twine.h:439
LLVM_NODISCARD StringRef substr(size_t Start, size_t N=npos) const
Return a reference to the substring from [Start, Start + N).
Definition: StringRef.h:578
const char * getWeakRefDirective() const
Definition: MCAsmInfo.h:551
.no_dead_strip (MachO)
Definition: MCDirectives.h:36
LLVM_NODISCARD bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:126
Position
Position to insert a new instruction relative to an existing instruction.
PlatformType
Definition: MachO.h:484
virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value)
Emit an assignment of Value to Symbol.
Definition: MCStreamer.cpp:916
virtual void EmitWinCFIStartChained(SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:661
Context object for machine code objects.
Definition: MCContext.h:64
const char * getWeakDirective() const
Definition: MCAsmInfo.h:550
formatted_raw_ostream & PadToColumn(unsigned NewCol)
PadToColumn - Align the output to some column number.
.code16 (X86) / .code 16 (ARM)
Definition: MCDirectives.h:51
virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &CurFrame)
Definition: MCStreamer.cpp:405
raw_ostream & write_hex(unsigned long long N)
Output N in hexadecimal, without any prefix or padding.
.type _foo, STT_GNU_IFUNC
Definition: MCDirectives.h:24
.alt_entry (MachO)
Definition: MCDirectives.h:38
MCStreamer * createAsmStreamer(MCContext &Ctx, std::unique_ptr< formatted_raw_ostream > OS, bool isVerboseAsm, bool useDwarfDirectory, MCInstPrinter *InstPrint, MCCodeEmitter *CE, MCAsmBackend *TAB, bool ShowInst)
Create a machine code streamer which will print out assembly for the native target, suitable for compiling with a native assembler.
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:32
.protected (ELF)
Definition: MCDirectives.h:40
LLVM_NODISCARD size_t size() const
size - Get the string size.
Definition: StringRef.h:130
.lazy_reference (MachO)
Definition: MCDirectives.h:34
virtual void EmitCFIRestoreState()
Definition: MCStreamer.cpp:505
const char * getTPRel32Directive() const
Definition: MCAsmInfo.h:423
bool hasNoDeadStrip() const
Definition: MCAsmInfo.h:548
.reference (MachO)
Definition: MCDirectives.h:41
StringRef getSegmentName() const
Analysis containing CSE Info
Definition: CSEInfo.cpp:20
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
bool supportsExtendedDwarfLocDirective() const
Definition: MCAsmInfo.h:603
virtual void EmitCFIRestore(int64_t Register)
Definition: MCStreamer.cpp:525
const char * getData8bitsDirective() const
Definition: MCAsmInfo.h:414
Flag
These should be considered private to the implementation of the MCInstrDesc class.
Definition: MCInstrDesc.h:117
MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc object...
This class is intended to be used as a base class for asm properties and features specific to the tar...
Definition: MCAsmInfo.h:56
void append(in_iter S, in_iter E)
Append from an iterator pair.
Definition: SmallString.h:74
.hidden (ELF)
Definition: MCDirectives.h:31
.data_region jt32
Definition: MCDirectives.h:60
const SmallVectorImpl< MCDwarfFile > & getMCDwarfFiles() const
Definition: MCDwarf.h:362
Streaming machine code generation interface.
Definition: MCStreamer.h:188
void print(raw_ostream &OS, const MCAsmInfo *MAI, bool InParens=false) const
Definition: MCExpr.cpp:42
unsigned const MachineRegisterInfo * MRI
.weak_def_can_be_hidden (MachO)
Definition: MCDirectives.h:45
bool useDwarfRegNumForCFI() const
Definition: MCAsmInfo.h:601
const char * getData16bitsDirective() const
Definition: MCAsmInfo.h:415
constexpr bool isPowerOf2_32(uint32_t Value)
Return true if the argument is a power of two > 0.
Definition: MathExtras.h:428
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:320
.tvos_version_min
Definition: MCDirectives.h:67
static char toOctal(int X)
unsigned getAssemblerDialect() const
Definition: MCAsmInfo.h:515
#define DWARF2_FLAG_EPILOGUE_BEGIN
Definition: MCDwarf.h:85
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
const char * getSeparatorString() const
Definition: MCAsmInfo.h:486
LLVM_NODISCARD size_t find(char C, size_t From=0) const
Search for the first character C in the string.
Definition: StringRef.h:285
unsigned getMajor() const
Retrieve the major version number.
Definition: VersionTuple.h:67
virtual void EmitCFIDefCfaRegister(int64_t Register)
Definition: MCStreamer.cpp:448
MCLOHType
Linker Optimization Hint Type.
StringRef getCommentString() const
Definition: MCAsmInfo.h:492
.subsections_via_symbols (MachO)
Definition: MCDirectives.h:50
amdgpu Simplify well known AMD library false FunctionCallee Value * Arg
LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const
Definition: MCAsmInfo.h:540
#define DWARF2_FLAG_BASIC_BLOCK
Definition: MCDwarf.h:83
virtual void EmitWinEHHandlerData(SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:705
static const char * getVersionMinDirective(MCVersionMinType Type)
uint32_t getOffset() const
Definition: MCFixup.h:125
SectionVariant getVariant() const
Definition: MCSection.h:107
virtual void EmitCFIUndefined(int64_t Register)
Definition: MCStreamer.cpp:561
virtual void EmitCFINegateRAState()
Definition: MCStreamer.cpp:591
bool hasSubsectionsViaSymbols() const
Definition: MCAsmInfo.h:410
.weak_reference (MachO)
Definition: MCDirectives.h:44
void toVector(SmallVectorImpl< char > &Out) const
Append the concatenated string into the given SmallString or SmallVector.
Definition: Twine.cpp:32
const char * getData32bitsDirective() const
Definition: MCAsmInfo.h:416
virtual void EmitWinCFIEndChained(SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:674
size_t size() const
Definition: SmallVector.h:52
LLVM_NODISCARD char back() const
back - Get the last character in the string.
Definition: StringRef.h:141
virtual void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T, raw_ostream &OS, const MCExpr *Subsection) const =0
virtual void EmitWinCFISetFrame(unsigned Register, unsigned Offset, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:777
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Optional< unsigned > getMinor() const
Retrieve the minor version number, if provided.
Definition: VersionTuple.h:70
virtual void EmitWinCFIPushFrame(bool Code, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:848
static void PrintCFIEscape(llvm::formatted_raw_ostream &OS, StringRef Values)
const MCDummyFragment & getDummyFragment() const
Definition: MCSection.h:159
virtual void EmitCFIReturnColumn(int64_t Register)
Definition: MCStreamer.cpp:600
BlockVerifier::State From
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
const MCSymbol & getSymbol() const
Definition: MCExpr.h:344
virtual void EmitCFIOffset(int64_t Register, int64_t Offset)
Definition: MCStreamer.cpp:459
This is a &#39;vector&#39; (really, a variable-sized array), optimized for the case when the array is small...
Definition: SmallVector.h:837
virtual void EmitWinCFIEndProlog(SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:862
.indirect_symbol (MachO)
Definition: MCDirectives.h:32
virtual void EmitWinCFIAllocStack(unsigned Size, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:799
.type _foo, STT_TLS # aka
Definition: MCDirectives.h:26
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:324
unsigned TargetSize
The number of bits written by this fixup.
StringRef str()
Return a StringRef for the vector contents.
Definition: raw_ostream.h:534
reference get()
Returns a reference to the stored T value.
Definition: Error.h:532
MCSymbolAttr
Definition: MCDirectives.h:18
static StringRef MCLOHDirectiveName()
unsigned Log2_32(uint32_t Value)
Return the floor log base 2 of the specified value, -1 if the value is zero.
Definition: MathExtras.h:538
const MCSymbol * Function
Definition: MCWinEH.h:36
.syntax (ARM/ELF)
Definition: MCDirectives.h:49
MCSection & getSection() const
Get the section associated with a defined, non-absolute symbol.
Definition: MCSymbol.h:268
size_t GetNumBytesInBuffer() const
Definition: raw_ostream.h:133
.internal (ELF)
Definition: MCDirectives.h:33
static void Emit(MCStreamer *MCOS)
Definition: MCDwarf.cpp:1136
.code32 (X86) / .code 32 (ARM)
Definition: MCDirectives.h:52
.type _foo, STT_COMMON # aka
Definition: MCDirectives.h:27
.code64 (X86)
Definition: MCDirectives.h:53
LLVM_NODISCARD bool equals(StringRef RHS) const
equals - Check for string equality, this is more efficient than compare() when the relative ordering ...
Definition: StringRef.h:160
static const char * getPlatformName(MachO::PlatformType Type)
This is an instance of a target assembly language printer that converts an MCInst to valid target ass...
Definition: MCInstPrinter.h:39
.symbol_resolver (MachO)
Definition: MCDirectives.h:37
Represents a version number in the form major[.minor[.subminor[.build]]].
Definition: VersionTuple.h:26
virtual void EmitWinCFISaveReg(unsigned Register, unsigned Offset, SMLoc Loc=SMLoc())
Definition: MCStreamer.cpp:816
.type _foo,
Definition: MCDirectives.h:30
virtual void EmitCFISignalFrame()
Definition: MCStreamer.cpp:554
virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset)
Definition: MCStreamer.cpp:469
LLVM_NODISCARD bool empty() const
Definition: SmallVector.h:55
MCAssemblerFlag
Definition: MCDirectives.h:48
.type _foo, STT_FUNC # aka
Definition: MCDirectives.h:23
LLVM_NODISCARD size_t find_first_of(char C, size_t From=0) const
Find the first character in the string that is C, or npos if not found.
Definition: StringRef.h:380
#define I(x, y, z)
Definition: MD5.cpp:58
const char * getDTPRel32Directive() const
Definition: MCAsmInfo.h:421
Generic base class for all target subtargets.
uint32_t Size
Definition: Profile.cpp:46
bool isLittleEndian() const
True if the target is little endian.
Definition: MCAsmInfo.h:405
.weak_definition (MachO)
Definition: MCDirectives.h:43
void emitFill(uint64_t NumBytes, uint8_t FillValue)
Emit NumBytes bytes worth of the value specified by FillValue.
Definition: MCStreamer.cpp:200
virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset)
Definition: MCStreamer.cpp:417
Target independent information on a fixup kind.
const char * getAsciiDirective() const
Definition: MCAsmInfo.h:524
static void printDwarfFileDirective(unsigned FileNo, StringRef Directory, StringRef Filename, Optional< MD5::MD5Result > Checksum, Optional< StringRef > Source, bool UseDwarfDirectory, raw_svector_ostream &OS)
const char * getGPRel32Directive() const
Definition: MCAsmInfo.h:419
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
.private_extern (MachO)
Definition: MCDirectives.h:39
unsigned getTextAlignFillValue() const
Definition: MCAsmInfo.h:527
.data_region jt8
Definition: MCDirectives.h:58
LLVM_NODISCARD char front() const
front - Get the first character in the string.
Definition: StringRef.h:134
unsigned getCommentColumn() const
This indicates the column (zero-based) at which asm comments should be printed.
Definition: MCAsmInfo.h:490
static int MCLOHIdToNbArgs(MCLOHType Kind)
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:279
uint64_t PowerOf2Floor(uint64_t A)
Returns the power of two which is less than or equal to the given value.
Definition: MathExtras.h:656
MCVersionMinType
Definition: MCDirectives.h:64
LLVM Value Representation.
Definition: Value.h:72
static cl::opt< bool, true > Debug("debug", cl::desc("Enable debug output"), cl::Hidden, cl::location(DebugFlag))
virtual bool EmitCVFuncIdDirective(unsigned FunctionId)
Introduces a function id for use with .cv_loc.
Definition: MCStreamer.cpp:275
raw_ostream & nulls()
This returns a reference to a raw_ostream which simply discards output.
virtual void EmitCFIBKeyFrame()
Definition: MCStreamer.cpp:228
static StringRef MCLOHIdToName(MCLOHType Kind)
virtual void EmitLabel(MCSymbol *Symbol, SMLoc Loc=SMLoc())
Emit a label for Symbol into the current section.
Definition: MCStreamer.cpp:351
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:45
const MCExpr * getValue() const
Definition: MCFixup.h:128
const char * getCode64Directive() const
Definition: MCAsmInfo.h:514
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
Optional< unsigned > getSubminor() const
Retrieve the subminor version number, if provided.
Definition: VersionTuple.h:77
bool empty() const
Determine whether this version information is empty (e.g., all version components are zero)...
Definition: VersionTuple.h:62
Expected< unsigned > tryGetFile(StringRef &Directory, StringRef &FileName, Optional< MD5::MD5Result > Checksum, Optional< StringRef > Source, uint16_t DwarfVersion, unsigned FileNumber=0)
Definition: MCDwarf.cpp:537
static void PrintQuotedString(StringRef Data, raw_ostream &OS)
Represents a location in source code.
Definition: SMLoc.h:23
std::string toHex(StringRef Input, bool LowerCase=false)
Convert buffer Input to its hexadecimal representation.
Definition: StringExtras.h:141
constexpr char Args[]
Key for Kernel::Metadata::mArgs.
virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment)
Definition: MCStreamer.cpp:438
.end_data_region
Definition: MCDirectives.h:61
MCFixupKind getKind() const
Definition: MCFixup.h:123
Wrapper class representing virtual and physical registers.
Definition: Register.h:18
bool empty() const
empty - Check if the array is empty.
Definition: ArrayRef.h:143
const char * getCode32Directive() const
Definition: MCAsmInfo.h:513
virtual void EmitCFIWindowSave()
Definition: MCStreamer.cpp:581
void print(raw_ostream &OS, const MCAsmInfo *MAI) const
print - Print the value to the stream OS.
Definition: MCSymbol.cpp:59
void resize(size_type N)
Definition: SmallVector.h:344