clang  8.0.0svn
CGDebugInfo.cpp
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1 //===--- CGDebugInfo.cpp - Emit Debug Information for a Module ------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This coordinates the debug information generation while generating code.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "CGDebugInfo.h"
15 #include "CGBlocks.h"
16 #include "CGCXXABI.h"
17 #include "CGObjCRuntime.h"
18 #include "CGRecordLayout.h"
19 #include "CodeGenFunction.h"
20 #include "CodeGenModule.h"
21 #include "ConstantEmitter.h"
22 #include "clang/AST/ASTContext.h"
23 #include "clang/AST/DeclFriend.h"
24 #include "clang/AST/DeclObjC.h"
25 #include "clang/AST/DeclTemplate.h"
26 #include "clang/AST/Expr.h"
27 #include "clang/AST/RecordLayout.h"
31 #include "clang/Basic/Version.h"
34 #include "clang/Lex/ModuleMap.h"
36 #include "llvm/ADT/DenseSet.h"
37 #include "llvm/ADT/SmallVector.h"
38 #include "llvm/ADT/StringExtras.h"
39 #include "llvm/IR/Constants.h"
40 #include "llvm/IR/DataLayout.h"
41 #include "llvm/IR/DerivedTypes.h"
42 #include "llvm/IR/Instructions.h"
43 #include "llvm/IR/Intrinsics.h"
44 #include "llvm/IR/Metadata.h"
45 #include "llvm/IR/Module.h"
46 #include "llvm/Support/FileSystem.h"
47 #include "llvm/Support/MD5.h"
48 #include "llvm/Support/Path.h"
49 using namespace clang;
50 using namespace clang::CodeGen;
51 
52 static uint32_t getTypeAlignIfRequired(const Type *Ty, const ASTContext &Ctx) {
53  auto TI = Ctx.getTypeInfo(Ty);
54  return TI.AlignIsRequired ? TI.Align : 0;
55 }
56 
57 static uint32_t getTypeAlignIfRequired(QualType Ty, const ASTContext &Ctx) {
58  return getTypeAlignIfRequired(Ty.getTypePtr(), Ctx);
59 }
60 
61 static uint32_t getDeclAlignIfRequired(const Decl *D, const ASTContext &Ctx) {
62  return D->hasAttr<AlignedAttr>() ? D->getMaxAlignment() : 0;
63 }
64 
66  : CGM(CGM), DebugKind(CGM.getCodeGenOpts().getDebugInfo()),
67  DebugTypeExtRefs(CGM.getCodeGenOpts().DebugTypeExtRefs),
68  DBuilder(CGM.getModule()) {
69  for (const auto &KV : CGM.getCodeGenOpts().DebugPrefixMap)
70  DebugPrefixMap[KV.first] = KV.second;
71  CreateCompileUnit();
72 }
73 
75  assert(LexicalBlockStack.empty() &&
76  "Region stack mismatch, stack not empty!");
77 }
78 
79 ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF,
80  SourceLocation TemporaryLocation)
81  : CGF(&CGF) {
82  init(TemporaryLocation);
83 }
84 
85 ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF,
86  bool DefaultToEmpty,
87  SourceLocation TemporaryLocation)
88  : CGF(&CGF) {
89  init(TemporaryLocation, DefaultToEmpty);
90 }
91 
92 void ApplyDebugLocation::init(SourceLocation TemporaryLocation,
93  bool DefaultToEmpty) {
94  auto *DI = CGF->getDebugInfo();
95  if (!DI) {
96  CGF = nullptr;
97  return;
98  }
99 
100  OriginalLocation = CGF->Builder.getCurrentDebugLocation();
101 
102  if (OriginalLocation && !DI->CGM.getExpressionLocationsEnabled())
103  return;
104 
105  if (TemporaryLocation.isValid()) {
106  DI->EmitLocation(CGF->Builder, TemporaryLocation);
107  return;
108  }
109 
110  if (DefaultToEmpty) {
111  CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc());
112  return;
113  }
114 
115  // Construct a location that has a valid scope, but no line info.
116  assert(!DI->LexicalBlockStack.empty());
117  CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(
118  0, 0, DI->LexicalBlockStack.back(), DI->getInlinedAt()));
119 }
120 
121 ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E)
122  : CGF(&CGF) {
123  init(E->getExprLoc());
124 }
125 
126 ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc)
127  : CGF(&CGF) {
128  if (!CGF.getDebugInfo()) {
129  this->CGF = nullptr;
130  return;
131  }
132  OriginalLocation = CGF.Builder.getCurrentDebugLocation();
133  if (Loc)
134  CGF.Builder.SetCurrentDebugLocation(std::move(Loc));
135 }
136 
138  // Query CGF so the location isn't overwritten when location updates are
139  // temporarily disabled (for C++ default function arguments)
140  if (CGF)
141  CGF->Builder.SetCurrentDebugLocation(std::move(OriginalLocation));
142 }
143 
145  GlobalDecl InlinedFn)
146  : CGF(&CGF) {
147  if (!CGF.getDebugInfo()) {
148  this->CGF = nullptr;
149  return;
150  }
151  auto &DI = *CGF.getDebugInfo();
152  SavedLocation = DI.getLocation();
153  assert((DI.getInlinedAt() ==
154  CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) &&
155  "CGDebugInfo and IRBuilder are out of sync");
156 
157  DI.EmitInlineFunctionStart(CGF.Builder, InlinedFn);
158 }
159 
161  if (!CGF)
162  return;
163  auto &DI = *CGF->getDebugInfo();
165  DI.EmitLocation(CGF->Builder, SavedLocation);
166 }
167 
169  // If the new location isn't valid return.
170  if (Loc.isInvalid())
171  return;
172 
173  CurLoc = CGM.getContext().getSourceManager().getExpansionLoc(Loc);
174 
175  // If we've changed files in the middle of a lexical scope go ahead
176  // and create a new lexical scope with file node if it's different
177  // from the one in the scope.
178  if (LexicalBlockStack.empty())
179  return;
180 
181  SourceManager &SM = CGM.getContext().getSourceManager();
182  auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
183  PresumedLoc PCLoc = SM.getPresumedLoc(CurLoc);
184  if (PCLoc.isInvalid() || Scope->getFile() == getOrCreateFile(CurLoc))
185  return;
186 
187  if (auto *LBF = dyn_cast<llvm::DILexicalBlockFile>(Scope)) {
188  LexicalBlockStack.pop_back();
189  LexicalBlockStack.emplace_back(DBuilder.createLexicalBlockFile(
190  LBF->getScope(), getOrCreateFile(CurLoc)));
191  } else if (isa<llvm::DILexicalBlock>(Scope) ||
192  isa<llvm::DISubprogram>(Scope)) {
193  LexicalBlockStack.pop_back();
194  LexicalBlockStack.emplace_back(
195  DBuilder.createLexicalBlockFile(Scope, getOrCreateFile(CurLoc)));
196  }
197 }
198 
199 llvm::DIScope *CGDebugInfo::getDeclContextDescriptor(const Decl *D) {
200  llvm::DIScope *Mod = getParentModuleOrNull(D);
201  return getContextDescriptor(cast<Decl>(D->getDeclContext()),
202  Mod ? Mod : TheCU);
203 }
204 
205 llvm::DIScope *CGDebugInfo::getContextDescriptor(const Decl *Context,
206  llvm::DIScope *Default) {
207  if (!Context)
208  return Default;
209 
210  auto I = RegionMap.find(Context);
211  if (I != RegionMap.end()) {
212  llvm::Metadata *V = I->second;
213  return dyn_cast_or_null<llvm::DIScope>(V);
214  }
215 
216  // Check namespace.
217  if (const auto *NSDecl = dyn_cast<NamespaceDecl>(Context))
218  return getOrCreateNamespace(NSDecl);
219 
220  if (const auto *RDecl = dyn_cast<RecordDecl>(Context))
221  if (!RDecl->isDependentType())
222  return getOrCreateType(CGM.getContext().getTypeDeclType(RDecl),
223  TheCU->getFile());
224  return Default;
225 }
226 
227 PrintingPolicy CGDebugInfo::getPrintingPolicy() const {
228  PrintingPolicy PP = CGM.getContext().getPrintingPolicy();
229 
230  // If we're emitting codeview, it's important to try to match MSVC's naming so
231  // that visualizers written for MSVC will trigger for our class names. In
232  // particular, we can't have spaces between arguments of standard templates
233  // like basic_string and vector.
234  if (CGM.getCodeGenOpts().EmitCodeView)
235  PP.MSVCFormatting = true;
236 
237  // Apply -fdebug-prefix-map.
238  PP.RemapFilePaths = true;
239  PP.remapPath = [this](StringRef Path) { return remapDIPath(Path); };
240  return PP;
241 }
242 
243 StringRef CGDebugInfo::getFunctionName(const FunctionDecl *FD) {
244  assert(FD && "Invalid FunctionDecl!");
245  IdentifierInfo *FII = FD->getIdentifier();
248 
249  // Emit the unqualified name in normal operation. LLVM and the debugger can
250  // compute the fully qualified name from the scope chain. If we're only
251  // emitting line table info, there won't be any scope chains, so emit the
252  // fully qualified name here so that stack traces are more accurate.
253  // FIXME: Do this when emitting DWARF as well as when emitting CodeView after
254  // evaluating the size impact.
255  bool UseQualifiedName = DebugKind == codegenoptions::DebugLineTablesOnly &&
256  CGM.getCodeGenOpts().EmitCodeView;
257 
258  if (!Info && FII && !UseQualifiedName)
259  return FII->getName();
260 
261  SmallString<128> NS;
262  llvm::raw_svector_ostream OS(NS);
263  if (!UseQualifiedName)
264  FD->printName(OS);
265  else
266  FD->printQualifiedName(OS, getPrintingPolicy());
267 
268  // Add any template specialization args.
269  if (Info) {
270  const TemplateArgumentList *TArgs = Info->TemplateArguments;
271  printTemplateArgumentList(OS, TArgs->asArray(), getPrintingPolicy());
272  }
273 
274  // Copy this name on the side and use its reference.
275  return internString(OS.str());
276 }
277 
278 StringRef CGDebugInfo::getObjCMethodName(const ObjCMethodDecl *OMD) {
279  SmallString<256> MethodName;
280  llvm::raw_svector_ostream OS(MethodName);
281  OS << (OMD->isInstanceMethod() ? '-' : '+') << '[';
282  const DeclContext *DC = OMD->getDeclContext();
283  if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) {
284  OS << OID->getName();
285  } else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) {
286  OS << OID->getName();
287  } else if (const auto *OC = dyn_cast<ObjCCategoryDecl>(DC)) {
288  if (OC->IsClassExtension()) {
289  OS << OC->getClassInterface()->getName();
290  } else {
291  OS << OC->getIdentifier()->getNameStart() << '('
292  << OC->getIdentifier()->getNameStart() << ')';
293  }
294  } else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) {
295  OS << OCD->getClassInterface()->getName() << '(' << OCD->getName() << ')';
296  } else if (isa<ObjCProtocolDecl>(DC)) {
297  // We can extract the type of the class from the self pointer.
298  if (ImplicitParamDecl *SelfDecl = OMD->getSelfDecl()) {
299  QualType ClassTy =
300  cast<ObjCObjectPointerType>(SelfDecl->getType())->getPointeeType();
301  ClassTy.print(OS, PrintingPolicy(LangOptions()));
302  }
303  }
304  OS << ' ' << OMD->getSelector().getAsString() << ']';
305 
306  return internString(OS.str());
307 }
308 
309 StringRef CGDebugInfo::getSelectorName(Selector S) {
310  return internString(S.getAsString());
311 }
312 
313 StringRef CGDebugInfo::getClassName(const RecordDecl *RD) {
314  if (isa<ClassTemplateSpecializationDecl>(RD)) {
315  SmallString<128> Name;
316  llvm::raw_svector_ostream OS(Name);
317  RD->getNameForDiagnostic(OS, getPrintingPolicy(),
318  /*Qualified*/ false);
319 
320  // Copy this name on the side and use its reference.
321  return internString(Name);
322  }
323 
324  // quick optimization to avoid having to intern strings that are already
325  // stored reliably elsewhere
326  if (const IdentifierInfo *II = RD->getIdentifier())
327  return II->getName();
328 
329  // The CodeView printer in LLVM wants to see the names of unnamed types: it is
330  // used to reconstruct the fully qualified type names.
331  if (CGM.getCodeGenOpts().EmitCodeView) {
332  if (const TypedefNameDecl *D = RD->getTypedefNameForAnonDecl()) {
333  assert(RD->getDeclContext() == D->getDeclContext() &&
334  "Typedef should not be in another decl context!");
335  assert(D->getDeclName().getAsIdentifierInfo() &&
336  "Typedef was not named!");
337  return D->getDeclName().getAsIdentifierInfo()->getName();
338  }
339 
340  if (CGM.getLangOpts().CPlusPlus) {
341  StringRef Name;
342 
343  ASTContext &Context = CGM.getContext();
344  if (const DeclaratorDecl *DD = Context.getDeclaratorForUnnamedTagDecl(RD))
345  // Anonymous types without a name for linkage purposes have their
346  // declarator mangled in if they have one.
347  Name = DD->getName();
348  else if (const TypedefNameDecl *TND =
350  // Anonymous types without a name for linkage purposes have their
351  // associate typedef mangled in if they have one.
352  Name = TND->getName();
353 
354  if (!Name.empty()) {
355  SmallString<256> UnnamedType("<unnamed-type-");
356  UnnamedType += Name;
357  UnnamedType += '>';
358  return internString(UnnamedType);
359  }
360  }
361  }
362 
363  return StringRef();
364 }
365 
367 CGDebugInfo::computeChecksum(FileID FID, SmallString<32> &Checksum) const {
368  Checksum.clear();
369 
370  if (!CGM.getCodeGenOpts().EmitCodeView &&
371  CGM.getCodeGenOpts().DwarfVersion < 5)
372  return None;
373 
374  SourceManager &SM = CGM.getContext().getSourceManager();
375  bool Invalid;
376  llvm::MemoryBuffer *MemBuffer = SM.getBuffer(FID, &Invalid);
377  if (Invalid)
378  return None;
379 
380  llvm::MD5 Hash;
381  llvm::MD5::MD5Result Result;
382 
383  Hash.update(MemBuffer->getBuffer());
384  Hash.final(Result);
385 
386  Hash.stringifyResult(Result, Checksum);
387  return llvm::DIFile::CSK_MD5;
388 }
389 
390 Optional<StringRef> CGDebugInfo::getSource(const SourceManager &SM,
391  FileID FID) {
392  if (!CGM.getCodeGenOpts().EmbedSource)
393  return None;
394 
395  bool SourceInvalid = false;
396  StringRef Source = SM.getBufferData(FID, &SourceInvalid);
397 
398  if (SourceInvalid)
399  return None;
400 
401  return Source;
402 }
403 
404 llvm::DIFile *CGDebugInfo::getOrCreateFile(SourceLocation Loc) {
405  if (!Loc.isValid())
406  // If Location is not valid then use main input file.
407  return TheCU->getFile();
408 
409  SourceManager &SM = CGM.getContext().getSourceManager();
410  PresumedLoc PLoc = SM.getPresumedLoc(Loc);
411 
412  StringRef FileName = PLoc.getFilename();
413  if (PLoc.isInvalid() || FileName.empty())
414  // If the location is not valid then use main input file.
415  return TheCU->getFile();
416 
417  // Cache the results.
418  auto It = DIFileCache.find(FileName.data());
419  if (It != DIFileCache.end()) {
420  // Verify that the information still exists.
421  if (llvm::Metadata *V = It->second)
422  return cast<llvm::DIFile>(V);
423  }
424 
425  SmallString<32> Checksum;
427  computeChecksum(SM.getFileID(Loc), Checksum);
429  if (CSKind)
430  CSInfo.emplace(*CSKind, Checksum);
431  return createFile(FileName, CSInfo, getSource(SM, SM.getFileID(Loc)));
432 }
433 
434 llvm::DIFile *
435 CGDebugInfo::createFile(StringRef FileName,
436  Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo,
437  Optional<StringRef> Source) {
438  StringRef Dir;
439  StringRef File;
440  std::string RemappedFile = remapDIPath(FileName);
441  std::string CurDir = remapDIPath(getCurrentDirname());
442  SmallString<128> DirBuf;
443  SmallString<128> FileBuf;
444  if (llvm::sys::path::is_absolute(RemappedFile)) {
445  // Strip the common prefix (if it is more than just "/") from current
446  // directory and FileName for a more space-efficient encoding.
447  auto FileIt = llvm::sys::path::begin(RemappedFile);
448  auto FileE = llvm::sys::path::end(RemappedFile);
449  auto CurDirIt = llvm::sys::path::begin(CurDir);
450  auto CurDirE = llvm::sys::path::end(CurDir);
451  for (; CurDirIt != CurDirE && *CurDirIt == *FileIt; ++CurDirIt, ++FileIt)
452  llvm::sys::path::append(DirBuf, *CurDirIt);
453  if (std::distance(llvm::sys::path::begin(CurDir), CurDirIt) == 1) {
454  // The common prefix only the root; stripping it would cause
455  // LLVM diagnostic locations to be more confusing.
456  Dir = {};
457  File = RemappedFile;
458  } else {
459  for (; FileIt != FileE; ++FileIt)
460  llvm::sys::path::append(FileBuf, *FileIt);
461  Dir = DirBuf;
462  File = FileBuf;
463  }
464  } else {
465  Dir = CurDir;
466  File = RemappedFile;
467  }
468  llvm::DIFile *F = DBuilder.createFile(File, Dir, CSInfo, Source);
469  DIFileCache[FileName.data()].reset(F);
470  return F;
471 }
472 
473 std::string CGDebugInfo::remapDIPath(StringRef Path) const {
474  for (const auto &Entry : DebugPrefixMap)
475  if (Path.startswith(Entry.first))
476  return (Twine(Entry.second) + Path.substr(Entry.first.size())).str();
477  return Path.str();
478 }
479 
480 unsigned CGDebugInfo::getLineNumber(SourceLocation Loc) {
481  if (Loc.isInvalid() && CurLoc.isInvalid())
482  return 0;
483  SourceManager &SM = CGM.getContext().getSourceManager();
484  PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc);
485  return PLoc.isValid() ? PLoc.getLine() : 0;
486 }
487 
488 unsigned CGDebugInfo::getColumnNumber(SourceLocation Loc, bool Force) {
489  // We may not want column information at all.
490  if (!Force && !CGM.getCodeGenOpts().DebugColumnInfo)
491  return 0;
492 
493  // If the location is invalid then use the current column.
494  if (Loc.isInvalid() && CurLoc.isInvalid())
495  return 0;
496  SourceManager &SM = CGM.getContext().getSourceManager();
497  PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc);
498  return PLoc.isValid() ? PLoc.getColumn() : 0;
499 }
500 
501 StringRef CGDebugInfo::getCurrentDirname() {
502  if (!CGM.getCodeGenOpts().DebugCompilationDir.empty())
503  return CGM.getCodeGenOpts().DebugCompilationDir;
504 
505  if (!CWDName.empty())
506  return CWDName;
507  SmallString<256> CWD;
508  llvm::sys::fs::current_path(CWD);
509  return CWDName = internString(CWD);
510 }
511 
512 void CGDebugInfo::CreateCompileUnit() {
513  SmallString<32> Checksum;
516 
517  // Should we be asking the SourceManager for the main file name, instead of
518  // accepting it as an argument? This just causes the main file name to
519  // mismatch with source locations and create extra lexical scopes or
520  // mismatched debug info (a CU with a DW_AT_file of "-", because that's what
521  // the driver passed, but functions/other things have DW_AT_file of "<stdin>"
522  // because that's what the SourceManager says)
523 
524  // Get absolute path name.
525  SourceManager &SM = CGM.getContext().getSourceManager();
526  std::string MainFileName = CGM.getCodeGenOpts().MainFileName;
527  if (MainFileName.empty())
528  MainFileName = "<stdin>";
529 
530  // The main file name provided via the "-main-file-name" option contains just
531  // the file name itself with no path information. This file name may have had
532  // a relative path, so we look into the actual file entry for the main
533  // file to determine the real absolute path for the file.
534  std::string MainFileDir;
535  if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
536  MainFileDir = remapDIPath(MainFile->getDir()->getName());
537  if (MainFileDir != ".") {
538  llvm::SmallString<1024> MainFileDirSS(MainFileDir);
539  llvm::sys::path::append(MainFileDirSS, MainFileName);
540  MainFileName = MainFileDirSS.str();
541  }
542  // If the main file name provided is identical to the input file name, and
543  // if the input file is a preprocessed source, use the module name for
544  // debug info. The module name comes from the name specified in the first
545  // linemarker if the input is a preprocessed source.
546  if (MainFile->getName() == MainFileName &&
548  MainFile->getName().rsplit('.').second)
549  .isPreprocessed())
550  MainFileName = CGM.getModule().getName().str();
551 
552  CSKind = computeChecksum(SM.getMainFileID(), Checksum);
553  }
554 
555  llvm::dwarf::SourceLanguage LangTag;
556  const LangOptions &LO = CGM.getLangOpts();
557  if (LO.CPlusPlus) {
558  if (LO.ObjC)
559  LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus;
560  else
561  LangTag = llvm::dwarf::DW_LANG_C_plus_plus;
562  } else if (LO.ObjC) {
563  LangTag = llvm::dwarf::DW_LANG_ObjC;
564  } else if (LO.RenderScript) {
565  LangTag = llvm::dwarf::DW_LANG_GOOGLE_RenderScript;
566  } else if (LO.C99) {
567  LangTag = llvm::dwarf::DW_LANG_C99;
568  } else {
569  LangTag = llvm::dwarf::DW_LANG_C89;
570  }
571 
572  std::string Producer = getClangFullVersion();
573 
574  // Figure out which version of the ObjC runtime we have.
575  unsigned RuntimeVers = 0;
576  if (LO.ObjC)
577  RuntimeVers = LO.ObjCRuntime.isNonFragile() ? 2 : 1;
578 
579  llvm::DICompileUnit::DebugEmissionKind EmissionKind;
580  switch (DebugKind) {
583  EmissionKind = llvm::DICompileUnit::NoDebug;
584  break;
586  EmissionKind = llvm::DICompileUnit::LineTablesOnly;
587  break;
590  break;
593  EmissionKind = llvm::DICompileUnit::FullDebug;
594  break;
595  }
596 
597  uint64_t DwoId = 0;
598  auto &CGOpts = CGM.getCodeGenOpts();
599  // The DIFile used by the CU is distinct from the main source
600  // file. Its directory part specifies what becomes the
601  // DW_AT_comp_dir (the compilation directory), even if the source
602  // file was specified with an absolute path.
603  if (CSKind)
604  CSInfo.emplace(*CSKind, Checksum);
605  llvm::DIFile *CUFile = DBuilder.createFile(
606  remapDIPath(MainFileName), remapDIPath(getCurrentDirname()), CSInfo,
607  getSource(SM, SM.getMainFileID()));
608 
609  // Create new compile unit.
610  TheCU = DBuilder.createCompileUnit(
611  LangTag, CUFile, CGOpts.EmitVersionIdentMetadata ? Producer : "",
612  LO.Optimize || CGOpts.PrepareForLTO || CGOpts.PrepareForThinLTO,
613  CGOpts.DwarfDebugFlags, RuntimeVers,
614  (CGOpts.getSplitDwarfMode() != CodeGenOptions::NoFission)
615  ? ""
616  : CGOpts.SplitDwarfFile,
617  EmissionKind, DwoId, CGOpts.SplitDwarfInlining,
618  CGOpts.DebugInfoForProfiling,
619  CGM.getTarget().getTriple().isNVPTX()
621  : static_cast<llvm::DICompileUnit::DebugNameTableKind>(
622  CGOpts.DebugNameTable),
623  CGOpts.DebugRangesBaseAddress);
624 }
625 
626 llvm::DIType *CGDebugInfo::CreateType(const BuiltinType *BT) {
627  llvm::dwarf::TypeKind Encoding;
628  StringRef BTName;
629  switch (BT->getKind()) {
630 #define BUILTIN_TYPE(Id, SingletonId)
631 #define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
632 #include "clang/AST/BuiltinTypes.def"
633  case BuiltinType::Dependent:
634  llvm_unreachable("Unexpected builtin type");
635  case BuiltinType::NullPtr:
636  return DBuilder.createNullPtrType();
637  case BuiltinType::Void:
638  return nullptr;
639  case BuiltinType::ObjCClass:
640  if (!ClassTy)
641  ClassTy =
642  DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
643  "objc_class", TheCU, TheCU->getFile(), 0);
644  return ClassTy;
645  case BuiltinType::ObjCId: {
646  // typedef struct objc_class *Class;
647  // typedef struct objc_object {
648  // Class isa;
649  // } *id;
650 
651  if (ObjTy)
652  return ObjTy;
653 
654  if (!ClassTy)
655  ClassTy =
656  DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
657  "objc_class", TheCU, TheCU->getFile(), 0);
658 
659  unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
660 
661  auto *ISATy = DBuilder.createPointerType(ClassTy, Size);
662 
663  ObjTy = DBuilder.createStructType(TheCU, "objc_object", TheCU->getFile(), 0,
664  0, 0, llvm::DINode::FlagZero, nullptr,
665  llvm::DINodeArray());
666 
667  DBuilder.replaceArrays(
668  ObjTy, DBuilder.getOrCreateArray(&*DBuilder.createMemberType(
669  ObjTy, "isa", TheCU->getFile(), 0, Size, 0, 0,
670  llvm::DINode::FlagZero, ISATy)));
671  return ObjTy;
672  }
673  case BuiltinType::ObjCSel: {
674  if (!SelTy)
675  SelTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
676  "objc_selector", TheCU,
677  TheCU->getFile(), 0);
678  return SelTy;
679  }
680 
681 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
682  case BuiltinType::Id: \
683  return getOrCreateStructPtrType("opencl_" #ImgType "_" #Suffix "_t", \
684  SingletonId);
685 #include "clang/Basic/OpenCLImageTypes.def"
686  case BuiltinType::OCLSampler:
687  return getOrCreateStructPtrType("opencl_sampler_t", OCLSamplerDITy);
688  case BuiltinType::OCLEvent:
689  return getOrCreateStructPtrType("opencl_event_t", OCLEventDITy);
690  case BuiltinType::OCLClkEvent:
691  return getOrCreateStructPtrType("opencl_clk_event_t", OCLClkEventDITy);
692  case BuiltinType::OCLQueue:
693  return getOrCreateStructPtrType("opencl_queue_t", OCLQueueDITy);
694  case BuiltinType::OCLReserveID:
695  return getOrCreateStructPtrType("opencl_reserve_id_t", OCLReserveIDDITy);
696 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
697  case BuiltinType::Id: \
698  return getOrCreateStructPtrType("opencl_" #ExtType, Id##Ty);
699 #include "clang/Basic/OpenCLExtensionTypes.def"
700 
701  case BuiltinType::UChar:
702  case BuiltinType::Char_U:
703  Encoding = llvm::dwarf::DW_ATE_unsigned_char;
704  break;
705  case BuiltinType::Char_S:
706  case BuiltinType::SChar:
707  Encoding = llvm::dwarf::DW_ATE_signed_char;
708  break;
709  case BuiltinType::Char8:
710  case BuiltinType::Char16:
711  case BuiltinType::Char32:
712  Encoding = llvm::dwarf::DW_ATE_UTF;
713  break;
714  case BuiltinType::UShort:
715  case BuiltinType::UInt:
716  case BuiltinType::UInt128:
717  case BuiltinType::ULong:
718  case BuiltinType::WChar_U:
719  case BuiltinType::ULongLong:
720  Encoding = llvm::dwarf::DW_ATE_unsigned;
721  break;
722  case BuiltinType::Short:
723  case BuiltinType::Int:
724  case BuiltinType::Int128:
725  case BuiltinType::Long:
726  case BuiltinType::WChar_S:
727  case BuiltinType::LongLong:
728  Encoding = llvm::dwarf::DW_ATE_signed;
729  break;
730  case BuiltinType::Bool:
731  Encoding = llvm::dwarf::DW_ATE_boolean;
732  break;
733  case BuiltinType::Half:
734  case BuiltinType::Float:
735  case BuiltinType::LongDouble:
736  case BuiltinType::Float16:
737  case BuiltinType::Float128:
738  case BuiltinType::Double:
739  // FIXME: For targets where long double and __float128 have the same size,
740  // they are currently indistinguishable in the debugger without some
741  // special treatment. However, there is currently no consensus on encoding
742  // and this should be updated once a DWARF encoding exists for distinct
743  // floating point types of the same size.
744  Encoding = llvm::dwarf::DW_ATE_float;
745  break;
746  case BuiltinType::ShortAccum:
747  case BuiltinType::Accum:
748  case BuiltinType::LongAccum:
749  case BuiltinType::ShortFract:
750  case BuiltinType::Fract:
751  case BuiltinType::LongFract:
752  case BuiltinType::SatShortFract:
753  case BuiltinType::SatFract:
754  case BuiltinType::SatLongFract:
755  case BuiltinType::SatShortAccum:
756  case BuiltinType::SatAccum:
757  case BuiltinType::SatLongAccum:
758  Encoding = llvm::dwarf::DW_ATE_signed_fixed;
759  break;
760  case BuiltinType::UShortAccum:
761  case BuiltinType::UAccum:
762  case BuiltinType::ULongAccum:
763  case BuiltinType::UShortFract:
764  case BuiltinType::UFract:
765  case BuiltinType::ULongFract:
766  case BuiltinType::SatUShortAccum:
767  case BuiltinType::SatUAccum:
768  case BuiltinType::SatULongAccum:
769  case BuiltinType::SatUShortFract:
770  case BuiltinType::SatUFract:
771  case BuiltinType::SatULongFract:
772  Encoding = llvm::dwarf::DW_ATE_unsigned_fixed;
773  break;
774  }
775 
776  switch (BT->getKind()) {
777  case BuiltinType::Long:
778  BTName = "long int";
779  break;
780  case BuiltinType::LongLong:
781  BTName = "long long int";
782  break;
783  case BuiltinType::ULong:
784  BTName = "long unsigned int";
785  break;
786  case BuiltinType::ULongLong:
787  BTName = "long long unsigned int";
788  break;
789  default:
790  BTName = BT->getName(CGM.getLangOpts());
791  break;
792  }
793  // Bit size and offset of the type.
794  uint64_t Size = CGM.getContext().getTypeSize(BT);
795  return DBuilder.createBasicType(BTName, Size, Encoding);
796 }
797 
798 llvm::DIType *CGDebugInfo::CreateType(const ComplexType *Ty) {
799  // Bit size and offset of the type.
800  llvm::dwarf::TypeKind Encoding = llvm::dwarf::DW_ATE_complex_float;
801  if (Ty->isComplexIntegerType())
802  Encoding = llvm::dwarf::DW_ATE_lo_user;
803 
804  uint64_t Size = CGM.getContext().getTypeSize(Ty);
805  return DBuilder.createBasicType("complex", Size, Encoding);
806 }
807 
808 llvm::DIType *CGDebugInfo::CreateQualifiedType(QualType Ty,
809  llvm::DIFile *Unit) {
811  const Type *T = Qc.strip(Ty);
812 
813  // Ignore these qualifiers for now.
814  Qc.removeObjCGCAttr();
815  Qc.removeAddressSpace();
816  Qc.removeObjCLifetime();
817 
818  // We will create one Derived type for one qualifier and recurse to handle any
819  // additional ones.
820  llvm::dwarf::Tag Tag;
821  if (Qc.hasConst()) {
822  Tag = llvm::dwarf::DW_TAG_const_type;
823  Qc.removeConst();
824  } else if (Qc.hasVolatile()) {
825  Tag = llvm::dwarf::DW_TAG_volatile_type;
826  Qc.removeVolatile();
827  } else if (Qc.hasRestrict()) {
828  Tag = llvm::dwarf::DW_TAG_restrict_type;
829  Qc.removeRestrict();
830  } else {
831  assert(Qc.empty() && "Unknown type qualifier for debug info");
832  return getOrCreateType(QualType(T, 0), Unit);
833  }
834 
835  auto *FromTy = getOrCreateType(Qc.apply(CGM.getContext(), T), Unit);
836 
837  // No need to fill in the Name, Line, Size, Alignment, Offset in case of
838  // CVR derived types.
839  return DBuilder.createQualifiedType(Tag, FromTy);
840 }
841 
842 llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectPointerType *Ty,
843  llvm::DIFile *Unit) {
844 
845  // The frontend treats 'id' as a typedef to an ObjCObjectType,
846  // whereas 'id<protocol>' is treated as an ObjCPointerType. For the
847  // debug info, we want to emit 'id' in both cases.
848  if (Ty->isObjCQualifiedIdType())
849  return getOrCreateType(CGM.getContext().getObjCIdType(), Unit);
850 
851  return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
852  Ty->getPointeeType(), Unit);
853 }
854 
855 llvm::DIType *CGDebugInfo::CreateType(const PointerType *Ty,
856  llvm::DIFile *Unit) {
857  return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
858  Ty->getPointeeType(), Unit);
859 }
860 
861 /// \return whether a C++ mangling exists for the type defined by TD.
862 static bool hasCXXMangling(const TagDecl *TD, llvm::DICompileUnit *TheCU) {
863  switch (TheCU->getSourceLanguage()) {
864  case llvm::dwarf::DW_LANG_C_plus_plus:
865  return true;
866  case llvm::dwarf::DW_LANG_ObjC_plus_plus:
867  return isa<CXXRecordDecl>(TD) || isa<EnumDecl>(TD);
868  default:
869  return false;
870  }
871 }
872 
873 // Determines if the debug info for this tag declaration needs a type
874 // identifier. The purpose of the unique identifier is to deduplicate type
875 // information for identical types across TUs. Because of the C++ one definition
876 // rule (ODR), it is valid to assume that the type is defined the same way in
877 // every TU and its debug info is equivalent.
878 //
879 // C does not have the ODR, and it is common for codebases to contain multiple
880 // different definitions of a struct with the same name in different TUs.
881 // Therefore, if the type doesn't have a C++ mangling, don't give it an
882 // identifer. Type information in C is smaller and simpler than C++ type
883 // information, so the increase in debug info size is negligible.
884 //
885 // If the type is not externally visible, it should be unique to the current TU,
886 // and should not need an identifier to participate in type deduplication.
887 // However, when emitting CodeView, the format internally uses these
888 // unique type name identifers for references between debug info. For example,
889 // the method of a class in an anonymous namespace uses the identifer to refer
890 // to its parent class. The Microsoft C++ ABI attempts to provide unique names
891 // for such types, so when emitting CodeView, always use identifiers for C++
892 // types. This may create problems when attempting to emit CodeView when the MS
893 // C++ ABI is not in use.
894 static bool needsTypeIdentifier(const TagDecl *TD, CodeGenModule &CGM,
895  llvm::DICompileUnit *TheCU) {
896  // We only add a type identifier for types with C++ name mangling.
897  if (!hasCXXMangling(TD, TheCU))
898  return false;
899 
900  // Externally visible types with C++ mangling need a type identifier.
901  if (TD->isExternallyVisible())
902  return true;
903 
904  // CodeView types with C++ mangling need a type identifier.
905  if (CGM.getCodeGenOpts().EmitCodeView)
906  return true;
907 
908  return false;
909 }
910 
911 // Returns a unique type identifier string if one exists, or an empty string.
912 static SmallString<256> getTypeIdentifier(const TagType *Ty, CodeGenModule &CGM,
913  llvm::DICompileUnit *TheCU) {
914  SmallString<256> Identifier;
915  const TagDecl *TD = Ty->getDecl();
916 
917  if (!needsTypeIdentifier(TD, CGM, TheCU))
918  return Identifier;
919 
920  // TODO: This is using the RTTI name. Is there a better way to get
921  // a unique string for a type?
922  llvm::raw_svector_ostream Out(Identifier);
924  return Identifier;
925 }
926 
927 /// \return the appropriate DWARF tag for a composite type.
928 static llvm::dwarf::Tag getTagForRecord(const RecordDecl *RD) {
929  llvm::dwarf::Tag Tag;
930  if (RD->isStruct() || RD->isInterface())
931  Tag = llvm::dwarf::DW_TAG_structure_type;
932  else if (RD->isUnion())
933  Tag = llvm::dwarf::DW_TAG_union_type;
934  else {
935  // FIXME: This could be a struct type giving a default visibility different
936  // than C++ class type, but needs llvm metadata changes first.
937  assert(RD->isClass());
938  Tag = llvm::dwarf::DW_TAG_class_type;
939  }
940  return Tag;
941 }
942 
943 llvm::DICompositeType *
944 CGDebugInfo::getOrCreateRecordFwdDecl(const RecordType *Ty,
945  llvm::DIScope *Ctx) {
946  const RecordDecl *RD = Ty->getDecl();
947  if (llvm::DIType *T = getTypeOrNull(CGM.getContext().getRecordType(RD)))
948  return cast<llvm::DICompositeType>(T);
949  llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
950  unsigned Line = getLineNumber(RD->getLocation());
951  StringRef RDName = getClassName(RD);
952 
953  uint64_t Size = 0;
954  uint32_t Align = 0;
955 
956  // Create the type.
957  SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
958  llvm::DICompositeType *RetTy = DBuilder.createReplaceableCompositeType(
959  getTagForRecord(RD), RDName, Ctx, DefUnit, Line, 0, Size, Align,
960  llvm::DINode::FlagFwdDecl, Identifier);
961  if (CGM.getCodeGenOpts().DebugFwdTemplateParams)
962  if (auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD))
963  DBuilder.replaceArrays(RetTy, llvm::DINodeArray(),
964  CollectCXXTemplateParams(TSpecial, DefUnit));
965  ReplaceMap.emplace_back(
966  std::piecewise_construct, std::make_tuple(Ty),
967  std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
968  return RetTy;
969 }
970 
971 llvm::DIType *CGDebugInfo::CreatePointerLikeType(llvm::dwarf::Tag Tag,
972  const Type *Ty,
973  QualType PointeeTy,
974  llvm::DIFile *Unit) {
975  // Bit size, align and offset of the type.
976  // Size is always the size of a pointer. We can't use getTypeSize here
977  // because that does not return the correct value for references.
978  unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(PointeeTy);
979  uint64_t Size = CGM.getTarget().getPointerWidth(AddressSpace);
980  auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
981  Optional<unsigned> DWARFAddressSpace =
982  CGM.getTarget().getDWARFAddressSpace(AddressSpace);
983 
984  if (Tag == llvm::dwarf::DW_TAG_reference_type ||
985  Tag == llvm::dwarf::DW_TAG_rvalue_reference_type)
986  return DBuilder.createReferenceType(Tag, getOrCreateType(PointeeTy, Unit),
987  Size, Align, DWARFAddressSpace);
988  else
989  return DBuilder.createPointerType(getOrCreateType(PointeeTy, Unit), Size,
990  Align, DWARFAddressSpace);
991 }
992 
993 llvm::DIType *CGDebugInfo::getOrCreateStructPtrType(StringRef Name,
994  llvm::DIType *&Cache) {
995  if (Cache)
996  return Cache;
997  Cache = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, Name,
998  TheCU, TheCU->getFile(), 0);
999  unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
1000  Cache = DBuilder.createPointerType(Cache, Size);
1001  return Cache;
1002 }
1003 
1004 uint64_t CGDebugInfo::collectDefaultElementTypesForBlockPointer(
1005  const BlockPointerType *Ty, llvm::DIFile *Unit, llvm::DIDerivedType *DescTy,
1006  unsigned LineNo, SmallVectorImpl<llvm::Metadata *> &EltTys) {
1007  QualType FType;
1008 
1009  // Advanced by calls to CreateMemberType in increments of FType, then
1010  // returned as the overall size of the default elements.
1011  uint64_t FieldOffset = 0;
1012 
1013  // Blocks in OpenCL have unique constraints which make the standard fields
1014  // redundant while requiring size and align fields for enqueue_kernel. See
1015  // initializeForBlockHeader in CGBlocks.cpp
1016  if (CGM.getLangOpts().OpenCL) {
1017  FType = CGM.getContext().IntTy;
1018  EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset));
1019  EltTys.push_back(CreateMemberType(Unit, FType, "__align", &FieldOffset));
1020  } else {
1021  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
1022  EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
1023  FType = CGM.getContext().IntTy;
1024  EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
1025  EltTys.push_back(CreateMemberType(Unit, FType, "__reserved", &FieldOffset));
1026  FType = CGM.getContext().getPointerType(Ty->getPointeeType());
1027  EltTys.push_back(CreateMemberType(Unit, FType, "__FuncPtr", &FieldOffset));
1028  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
1029  uint64_t FieldSize = CGM.getContext().getTypeSize(Ty);
1030  uint32_t FieldAlign = CGM.getContext().getTypeAlign(Ty);
1031  EltTys.push_back(DBuilder.createMemberType(
1032  Unit, "__descriptor", nullptr, LineNo, FieldSize, FieldAlign,
1033  FieldOffset, llvm::DINode::FlagZero, DescTy));
1034  FieldOffset += FieldSize;
1035  }
1036 
1037  return FieldOffset;
1038 }
1039 
1040 llvm::DIType *CGDebugInfo::CreateType(const BlockPointerType *Ty,
1041  llvm::DIFile *Unit) {
1043  QualType FType;
1044  uint64_t FieldOffset;
1045  llvm::DINodeArray Elements;
1046 
1047  FieldOffset = 0;
1048  FType = CGM.getContext().UnsignedLongTy;
1049  EltTys.push_back(CreateMemberType(Unit, FType, "reserved", &FieldOffset));
1050  EltTys.push_back(CreateMemberType(Unit, FType, "Size", &FieldOffset));
1051 
1052  Elements = DBuilder.getOrCreateArray(EltTys);
1053  EltTys.clear();
1054 
1055  llvm::DINode::DIFlags Flags = llvm::DINode::FlagAppleBlock;
1056 
1057  auto *EltTy =
1058  DBuilder.createStructType(Unit, "__block_descriptor", nullptr, 0,
1059  FieldOffset, 0, Flags, nullptr, Elements);
1060 
1061  // Bit size, align and offset of the type.
1062  uint64_t Size = CGM.getContext().getTypeSize(Ty);
1063 
1064  auto *DescTy = DBuilder.createPointerType(EltTy, Size);
1065 
1066  FieldOffset = collectDefaultElementTypesForBlockPointer(Ty, Unit, DescTy,
1067  0, EltTys);
1068 
1069  Elements = DBuilder.getOrCreateArray(EltTys);
1070 
1071  // The __block_literal_generic structs are marked with a special
1072  // DW_AT_APPLE_BLOCK attribute and are an implementation detail only
1073  // the debugger needs to know about. To allow type uniquing, emit
1074  // them without a name or a location.
1075  EltTy = DBuilder.createStructType(Unit, "", nullptr, 0, FieldOffset, 0,
1076  Flags, nullptr, Elements);
1077 
1078  return DBuilder.createPointerType(EltTy, Size);
1079 }
1080 
1081 llvm::DIType *CGDebugInfo::CreateType(const TemplateSpecializationType *Ty,
1082  llvm::DIFile *Unit) {
1083  assert(Ty->isTypeAlias());
1084  llvm::DIType *Src = getOrCreateType(Ty->getAliasedType(), Unit);
1085 
1086  SmallString<128> NS;
1087  llvm::raw_svector_ostream OS(NS);
1088  Ty->getTemplateName().print(OS, getPrintingPolicy(), /*qualified*/ false);
1089  printTemplateArgumentList(OS, Ty->template_arguments(), getPrintingPolicy());
1090 
1091  auto *AliasDecl =
1092  cast<TypeAliasTemplateDecl>(Ty->getTemplateName().getAsTemplateDecl())
1093  ->getTemplatedDecl();
1094 
1095  SourceLocation Loc = AliasDecl->getLocation();
1096  return DBuilder.createTypedef(Src, OS.str(), getOrCreateFile(Loc),
1097  getLineNumber(Loc),
1098  getDeclContextDescriptor(AliasDecl));
1099 }
1100 
1101 llvm::DIType *CGDebugInfo::CreateType(const TypedefType *Ty,
1102  llvm::DIFile *Unit) {
1103  // We don't set size information, but do specify where the typedef was
1104  // declared.
1105  SourceLocation Loc = Ty->getDecl()->getLocation();
1106 
1107  // Typedefs are derived from some other type.
1108  return DBuilder.createTypedef(
1109  getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit),
1110  Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc),
1111  getDeclContextDescriptor(Ty->getDecl()));
1112 }
1113 
1114 static unsigned getDwarfCC(CallingConv CC) {
1115  switch (CC) {
1116  case CC_C:
1117  // Avoid emitting DW_AT_calling_convention if the C convention was used.
1118  return 0;
1119 
1120  case CC_X86StdCall:
1121  return llvm::dwarf::DW_CC_BORLAND_stdcall;
1122  case CC_X86FastCall:
1123  return llvm::dwarf::DW_CC_BORLAND_msfastcall;
1124  case CC_X86ThisCall:
1125  return llvm::dwarf::DW_CC_BORLAND_thiscall;
1126  case CC_X86VectorCall:
1127  return llvm::dwarf::DW_CC_LLVM_vectorcall;
1128  case CC_X86Pascal:
1129  return llvm::dwarf::DW_CC_BORLAND_pascal;
1130  case CC_Win64:
1131  return llvm::dwarf::DW_CC_LLVM_Win64;
1132  case CC_X86_64SysV:
1133  return llvm::dwarf::DW_CC_LLVM_X86_64SysV;
1134  case CC_AAPCS:
1135  case CC_AArch64VectorCall:
1136  return llvm::dwarf::DW_CC_LLVM_AAPCS;
1137  case CC_AAPCS_VFP:
1138  return llvm::dwarf::DW_CC_LLVM_AAPCS_VFP;
1139  case CC_IntelOclBicc:
1140  return llvm::dwarf::DW_CC_LLVM_IntelOclBicc;
1141  case CC_SpirFunction:
1142  return llvm::dwarf::DW_CC_LLVM_SpirFunction;
1143  case CC_OpenCLKernel:
1144  return llvm::dwarf::DW_CC_LLVM_OpenCLKernel;
1145  case CC_Swift:
1146  return llvm::dwarf::DW_CC_LLVM_Swift;
1147  case CC_PreserveMost:
1148  return llvm::dwarf::DW_CC_LLVM_PreserveMost;
1149  case CC_PreserveAll:
1150  return llvm::dwarf::DW_CC_LLVM_PreserveAll;
1151  case CC_X86RegCall:
1152  return llvm::dwarf::DW_CC_LLVM_X86RegCall;
1153  }
1154  return 0;
1155 }
1156 
1157 llvm::DIType *CGDebugInfo::CreateType(const FunctionType *Ty,
1158  llvm::DIFile *Unit) {
1160 
1161  // Add the result type at least.
1162  EltTys.push_back(getOrCreateType(Ty->getReturnType(), Unit));
1163 
1164  // Set up remainder of arguments if there is a prototype.
1165  // otherwise emit it as a variadic function.
1166  if (isa<FunctionNoProtoType>(Ty))
1167  EltTys.push_back(DBuilder.createUnspecifiedParameter());
1168  else if (const auto *FPT = dyn_cast<FunctionProtoType>(Ty)) {
1169  for (const QualType &ParamType : FPT->param_types())
1170  EltTys.push_back(getOrCreateType(ParamType, Unit));
1171  if (FPT->isVariadic())
1172  EltTys.push_back(DBuilder.createUnspecifiedParameter());
1173  }
1174 
1175  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys);
1176  return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
1177  getDwarfCC(Ty->getCallConv()));
1178 }
1179 
1180 /// Convert an AccessSpecifier into the corresponding DINode flag.
1181 /// As an optimization, return 0 if the access specifier equals the
1182 /// default for the containing type.
1183 static llvm::DINode::DIFlags getAccessFlag(AccessSpecifier Access,
1184  const RecordDecl *RD) {
1186  if (RD && RD->isClass())
1187  Default = clang::AS_private;
1188  else if (RD && (RD->isStruct() || RD->isUnion()))
1189  Default = clang::AS_public;
1190 
1191  if (Access == Default)
1192  return llvm::DINode::FlagZero;
1193 
1194  switch (Access) {
1195  case clang::AS_private:
1196  return llvm::DINode::FlagPrivate;
1197  case clang::AS_protected:
1198  return llvm::DINode::FlagProtected;
1199  case clang::AS_public:
1200  return llvm::DINode::FlagPublic;
1201  case clang::AS_none:
1202  return llvm::DINode::FlagZero;
1203  }
1204  llvm_unreachable("unexpected access enumerator");
1205 }
1206 
1207 llvm::DIType *CGDebugInfo::createBitFieldType(const FieldDecl *BitFieldDecl,
1208  llvm::DIScope *RecordTy,
1209  const RecordDecl *RD) {
1210  StringRef Name = BitFieldDecl->getName();
1211  QualType Ty = BitFieldDecl->getType();
1212  SourceLocation Loc = BitFieldDecl->getLocation();
1213  llvm::DIFile *VUnit = getOrCreateFile(Loc);
1214  llvm::DIType *DebugType = getOrCreateType(Ty, VUnit);
1215 
1216  // Get the location for the field.
1217  llvm::DIFile *File = getOrCreateFile(Loc);
1218  unsigned Line = getLineNumber(Loc);
1219 
1220  const CGBitFieldInfo &BitFieldInfo =
1221  CGM.getTypes().getCGRecordLayout(RD).getBitFieldInfo(BitFieldDecl);
1222  uint64_t SizeInBits = BitFieldInfo.Size;
1223  assert(SizeInBits > 0 && "found named 0-width bitfield");
1224  uint64_t StorageOffsetInBits =
1225  CGM.getContext().toBits(BitFieldInfo.StorageOffset);
1226  uint64_t Offset = BitFieldInfo.Offset;
1227  // The bit offsets for big endian machines are reversed for big
1228  // endian target, compensate for that as the DIDerivedType requires
1229  // un-reversed offsets.
1230  if (CGM.getDataLayout().isBigEndian())
1231  Offset = BitFieldInfo.StorageSize - BitFieldInfo.Size - Offset;
1232  uint64_t OffsetInBits = StorageOffsetInBits + Offset;
1233  llvm::DINode::DIFlags Flags = getAccessFlag(BitFieldDecl->getAccess(), RD);
1234  return DBuilder.createBitFieldMemberType(
1235  RecordTy, Name, File, Line, SizeInBits, OffsetInBits, StorageOffsetInBits,
1236  Flags, DebugType);
1237 }
1238 
1239 llvm::DIType *
1240 CGDebugInfo::createFieldType(StringRef name, QualType type, SourceLocation loc,
1241  AccessSpecifier AS, uint64_t offsetInBits,
1242  uint32_t AlignInBits, llvm::DIFile *tunit,
1243  llvm::DIScope *scope, const RecordDecl *RD) {
1244  llvm::DIType *debugType = getOrCreateType(type, tunit);
1245 
1246  // Get the location for the field.
1247  llvm::DIFile *file = getOrCreateFile(loc);
1248  unsigned line = getLineNumber(loc);
1249 
1250  uint64_t SizeInBits = 0;
1251  auto Align = AlignInBits;
1252  if (!type->isIncompleteArrayType()) {
1253  TypeInfo TI = CGM.getContext().getTypeInfo(type);
1254  SizeInBits = TI.Width;
1255  if (!Align)
1256  Align = getTypeAlignIfRequired(type, CGM.getContext());
1257  }
1258 
1259  llvm::DINode::DIFlags flags = getAccessFlag(AS, RD);
1260  return DBuilder.createMemberType(scope, name, file, line, SizeInBits, Align,
1261  offsetInBits, flags, debugType);
1262 }
1263 
1264 void CGDebugInfo::CollectRecordLambdaFields(
1265  const CXXRecordDecl *CXXDecl, SmallVectorImpl<llvm::Metadata *> &elements,
1266  llvm::DIType *RecordTy) {
1267  // For C++11 Lambdas a Field will be the same as a Capture, but the Capture
1268  // has the name and the location of the variable so we should iterate over
1269  // both concurrently.
1270  const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(CXXDecl);
1271  RecordDecl::field_iterator Field = CXXDecl->field_begin();
1272  unsigned fieldno = 0;
1274  E = CXXDecl->captures_end();
1275  I != E; ++I, ++Field, ++fieldno) {
1276  const LambdaCapture &C = *I;
1277  if (C.capturesVariable()) {
1278  SourceLocation Loc = C.getLocation();
1279  assert(!Field->isBitField() && "lambdas don't have bitfield members!");
1280  VarDecl *V = C.getCapturedVar();
1281  StringRef VName = V->getName();
1282  llvm::DIFile *VUnit = getOrCreateFile(Loc);
1283  auto Align = getDeclAlignIfRequired(V, CGM.getContext());
1284  llvm::DIType *FieldType = createFieldType(
1285  VName, Field->getType(), Loc, Field->getAccess(),
1286  layout.getFieldOffset(fieldno), Align, VUnit, RecordTy, CXXDecl);
1287  elements.push_back(FieldType);
1288  } else if (C.capturesThis()) {
1289  // TODO: Need to handle 'this' in some way by probably renaming the
1290  // this of the lambda class and having a field member of 'this' or
1291  // by using AT_object_pointer for the function and having that be
1292  // used as 'this' for semantic references.
1293  FieldDecl *f = *Field;
1294  llvm::DIFile *VUnit = getOrCreateFile(f->getLocation());
1295  QualType type = f->getType();
1296  llvm::DIType *fieldType = createFieldType(
1297  "this", type, f->getLocation(), f->getAccess(),
1298  layout.getFieldOffset(fieldno), VUnit, RecordTy, CXXDecl);
1299 
1300  elements.push_back(fieldType);
1301  }
1302  }
1303 }
1304 
1305 llvm::DIDerivedType *
1306 CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy,
1307  const RecordDecl *RD) {
1308  // Create the descriptor for the static variable, with or without
1309  // constant initializers.
1310  Var = Var->getCanonicalDecl();
1311  llvm::DIFile *VUnit = getOrCreateFile(Var->getLocation());
1312  llvm::DIType *VTy = getOrCreateType(Var->getType(), VUnit);
1313 
1314  unsigned LineNumber = getLineNumber(Var->getLocation());
1315  StringRef VName = Var->getName();
1316  llvm::Constant *C = nullptr;
1317  if (Var->getInit()) {
1318  const APValue *Value = Var->evaluateValue();
1319  if (Value) {
1320  if (Value->isInt())
1321  C = llvm::ConstantInt::get(CGM.getLLVMContext(), Value->getInt());
1322  if (Value->isFloat())
1323  C = llvm::ConstantFP::get(CGM.getLLVMContext(), Value->getFloat());
1324  }
1325  }
1326 
1327  llvm::DINode::DIFlags Flags = getAccessFlag(Var->getAccess(), RD);
1328  auto Align = getDeclAlignIfRequired(Var, CGM.getContext());
1329  llvm::DIDerivedType *GV = DBuilder.createStaticMemberType(
1330  RecordTy, VName, VUnit, LineNumber, VTy, Flags, C, Align);
1331  StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV);
1332  return GV;
1333 }
1334 
1335 void CGDebugInfo::CollectRecordNormalField(
1336  const FieldDecl *field, uint64_t OffsetInBits, llvm::DIFile *tunit,
1337  SmallVectorImpl<llvm::Metadata *> &elements, llvm::DIType *RecordTy,
1338  const RecordDecl *RD) {
1339  StringRef name = field->getName();
1340  QualType type = field->getType();
1341 
1342  // Ignore unnamed fields unless they're anonymous structs/unions.
1343  if (name.empty() && !type->isRecordType())
1344  return;
1345 
1346  llvm::DIType *FieldType;
1347  if (field->isBitField()) {
1348  FieldType = createBitFieldType(field, RecordTy, RD);
1349  } else {
1350  auto Align = getDeclAlignIfRequired(field, CGM.getContext());
1351  FieldType =
1352  createFieldType(name, type, field->getLocation(), field->getAccess(),
1353  OffsetInBits, Align, tunit, RecordTy, RD);
1354  }
1355 
1356  elements.push_back(FieldType);
1357 }
1358 
1359 void CGDebugInfo::CollectRecordNestedType(
1360  const TypeDecl *TD, SmallVectorImpl<llvm::Metadata *> &elements) {
1361  QualType Ty = CGM.getContext().getTypeDeclType(TD);
1362  // Injected class names are not considered nested records.
1363  if (isa<InjectedClassNameType>(Ty))
1364  return;
1365  SourceLocation Loc = TD->getLocation();
1366  llvm::DIType *nestedType = getOrCreateType(Ty, getOrCreateFile(Loc));
1367  elements.push_back(nestedType);
1368 }
1369 
1370 void CGDebugInfo::CollectRecordFields(
1371  const RecordDecl *record, llvm::DIFile *tunit,
1373  llvm::DICompositeType *RecordTy) {
1374  const auto *CXXDecl = dyn_cast<CXXRecordDecl>(record);
1375 
1376  if (CXXDecl && CXXDecl->isLambda())
1377  CollectRecordLambdaFields(CXXDecl, elements, RecordTy);
1378  else {
1379  const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(record);
1380 
1381  // Field number for non-static fields.
1382  unsigned fieldNo = 0;
1383 
1384  // Static and non-static members should appear in the same order as
1385  // the corresponding declarations in the source program.
1386  for (const auto *I : record->decls())
1387  if (const auto *V = dyn_cast<VarDecl>(I)) {
1388  if (V->hasAttr<NoDebugAttr>())
1389  continue;
1390 
1391  // Skip variable template specializations when emitting CodeView. MSVC
1392  // doesn't emit them.
1393  if (CGM.getCodeGenOpts().EmitCodeView &&
1394  isa<VarTemplateSpecializationDecl>(V))
1395  continue;
1396 
1397  // Reuse the existing static member declaration if one exists
1398  auto MI = StaticDataMemberCache.find(V->getCanonicalDecl());
1399  if (MI != StaticDataMemberCache.end()) {
1400  assert(MI->second &&
1401  "Static data member declaration should still exist");
1402  elements.push_back(MI->second);
1403  } else {
1404  auto Field = CreateRecordStaticField(V, RecordTy, record);
1405  elements.push_back(Field);
1406  }
1407  } else if (const auto *field = dyn_cast<FieldDecl>(I)) {
1408  CollectRecordNormalField(field, layout.getFieldOffset(fieldNo), tunit,
1409  elements, RecordTy, record);
1410 
1411  // Bump field number for next field.
1412  ++fieldNo;
1413  } else if (CGM.getCodeGenOpts().EmitCodeView) {
1414  // Debug info for nested types is included in the member list only for
1415  // CodeView.
1416  if (const auto *nestedType = dyn_cast<TypeDecl>(I))
1417  if (!nestedType->isImplicit() &&
1418  nestedType->getDeclContext() == record)
1419  CollectRecordNestedType(nestedType, elements);
1420  }
1421  }
1422 }
1423 
1424 llvm::DISubroutineType *
1425 CGDebugInfo::getOrCreateMethodType(const CXXMethodDecl *Method,
1426  llvm::DIFile *Unit) {
1427  const FunctionProtoType *Func = Method->getType()->getAs<FunctionProtoType>();
1428  if (Method->isStatic())
1429  return cast_or_null<llvm::DISubroutineType>(
1430  getOrCreateType(QualType(Func, 0), Unit));
1431  return getOrCreateInstanceMethodType(Method->getThisType(CGM.getContext()),
1432  Func, Unit);
1433 }
1434 
1435 llvm::DISubroutineType *CGDebugInfo::getOrCreateInstanceMethodType(
1436  QualType ThisPtr, const FunctionProtoType *Func, llvm::DIFile *Unit) {
1437  // Add "this" pointer.
1438  llvm::DITypeRefArray Args(
1439  cast<llvm::DISubroutineType>(getOrCreateType(QualType(Func, 0), Unit))
1440  ->getTypeArray());
1441  assert(Args.size() && "Invalid number of arguments!");
1442 
1444 
1445  // First element is always return type. For 'void' functions it is NULL.
1446  Elts.push_back(Args[0]);
1447 
1448  // "this" pointer is always first argument.
1449  const CXXRecordDecl *RD = ThisPtr->getPointeeCXXRecordDecl();
1450  if (isa<ClassTemplateSpecializationDecl>(RD)) {
1451  // Create pointer type directly in this case.
1452  const PointerType *ThisPtrTy = cast<PointerType>(ThisPtr);
1453  QualType PointeeTy = ThisPtrTy->getPointeeType();
1454  unsigned AS = CGM.getContext().getTargetAddressSpace(PointeeTy);
1455  uint64_t Size = CGM.getTarget().getPointerWidth(AS);
1456  auto Align = getTypeAlignIfRequired(ThisPtrTy, CGM.getContext());
1457  llvm::DIType *PointeeType = getOrCreateType(PointeeTy, Unit);
1458  llvm::DIType *ThisPtrType =
1459  DBuilder.createPointerType(PointeeType, Size, Align);
1460  TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
1461  // TODO: This and the artificial type below are misleading, the
1462  // types aren't artificial the argument is, but the current
1463  // metadata doesn't represent that.
1464  ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType);
1465  Elts.push_back(ThisPtrType);
1466  } else {
1467  llvm::DIType *ThisPtrType = getOrCreateType(ThisPtr, Unit);
1468  TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
1469  ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType);
1470  Elts.push_back(ThisPtrType);
1471  }
1472 
1473  // Copy rest of the arguments.
1474  for (unsigned i = 1, e = Args.size(); i != e; ++i)
1475  Elts.push_back(Args[i]);
1476 
1477  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts);
1478 
1479  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
1480  if (Func->getExtProtoInfo().RefQualifier == RQ_LValue)
1481  Flags |= llvm::DINode::FlagLValueReference;
1482  if (Func->getExtProtoInfo().RefQualifier == RQ_RValue)
1483  Flags |= llvm::DINode::FlagRValueReference;
1484 
1485  return DBuilder.createSubroutineType(EltTypeArray, Flags,
1486  getDwarfCC(Func->getCallConv()));
1487 }
1488 
1489 /// isFunctionLocalClass - Return true if CXXRecordDecl is defined
1490 /// inside a function.
1491 static bool isFunctionLocalClass(const CXXRecordDecl *RD) {
1492  if (const auto *NRD = dyn_cast<CXXRecordDecl>(RD->getDeclContext()))
1493  return isFunctionLocalClass(NRD);
1494  if (isa<FunctionDecl>(RD->getDeclContext()))
1495  return true;
1496  return false;
1497 }
1498 
1499 llvm::DISubprogram *CGDebugInfo::CreateCXXMemberFunction(
1500  const CXXMethodDecl *Method, llvm::DIFile *Unit, llvm::DIType *RecordTy) {
1501  bool IsCtorOrDtor =
1502  isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method);
1503 
1504  StringRef MethodName = getFunctionName(Method);
1505  llvm::DISubroutineType *MethodTy = getOrCreateMethodType(Method, Unit);
1506 
1507  // Since a single ctor/dtor corresponds to multiple functions, it doesn't
1508  // make sense to give a single ctor/dtor a linkage name.
1509  StringRef MethodLinkageName;
1510  // FIXME: 'isFunctionLocalClass' seems like an arbitrary/unintentional
1511  // property to use here. It may've been intended to model "is non-external
1512  // type" but misses cases of non-function-local but non-external classes such
1513  // as those in anonymous namespaces as well as the reverse - external types
1514  // that are function local, such as those in (non-local) inline functions.
1515  if (!IsCtorOrDtor && !isFunctionLocalClass(Method->getParent()))
1516  MethodLinkageName = CGM.getMangledName(Method);
1517 
1518  // Get the location for the method.
1519  llvm::DIFile *MethodDefUnit = nullptr;
1520  unsigned MethodLine = 0;
1521  if (!Method->isImplicit()) {
1522  MethodDefUnit = getOrCreateFile(Method->getLocation());
1523  MethodLine = getLineNumber(Method->getLocation());
1524  }
1525 
1526  // Collect virtual method info.
1527  llvm::DIType *ContainingType = nullptr;
1528  unsigned VIndex = 0;
1529  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
1530  llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
1531  int ThisAdjustment = 0;
1532 
1533  if (Method->isVirtual()) {
1534  if (Method->isPure())
1535  SPFlags |= llvm::DISubprogram::SPFlagPureVirtual;
1536  else
1537  SPFlags |= llvm::DISubprogram::SPFlagVirtual;
1538 
1539  if (CGM.getTarget().getCXXABI().isItaniumFamily()) {
1540  // It doesn't make sense to give a virtual destructor a vtable index,
1541  // since a single destructor has two entries in the vtable.
1542  if (!isa<CXXDestructorDecl>(Method))
1543  VIndex = CGM.getItaniumVTableContext().getMethodVTableIndex(Method);
1544  } else {
1545  // Emit MS ABI vftable information. There is only one entry for the
1546  // deleting dtor.
1547  const auto *DD = dyn_cast<CXXDestructorDecl>(Method);
1548  GlobalDecl GD = DD ? GlobalDecl(DD, Dtor_Deleting) : GlobalDecl(Method);
1550  CGM.getMicrosoftVTableContext().getMethodVFTableLocation(GD);
1551  VIndex = ML.Index;
1552 
1553  // CodeView only records the vftable offset in the class that introduces
1554  // the virtual method. This is possible because, unlike Itanium, the MS
1555  // C++ ABI does not include all virtual methods from non-primary bases in
1556  // the vtable for the most derived class. For example, if C inherits from
1557  // A and B, C's primary vftable will not include B's virtual methods.
1558  if (Method->size_overridden_methods() == 0)
1559  Flags |= llvm::DINode::FlagIntroducedVirtual;
1560 
1561  // The 'this' adjustment accounts for both the virtual and non-virtual
1562  // portions of the adjustment. Presumably the debugger only uses it when
1563  // it knows the dynamic type of an object.
1564  ThisAdjustment = CGM.getCXXABI()
1565  .getVirtualFunctionPrologueThisAdjustment(GD)
1566  .getQuantity();
1567  }
1568  ContainingType = RecordTy;
1569  }
1570 
1571  if (Method->isStatic())
1572  Flags |= llvm::DINode::FlagStaticMember;
1573  if (Method->isImplicit())
1574  Flags |= llvm::DINode::FlagArtificial;
1575  Flags |= getAccessFlag(Method->getAccess(), Method->getParent());
1576  if (const auto *CXXC = dyn_cast<CXXConstructorDecl>(Method)) {
1577  if (CXXC->isExplicit())
1578  Flags |= llvm::DINode::FlagExplicit;
1579  } else if (const auto *CXXC = dyn_cast<CXXConversionDecl>(Method)) {
1580  if (CXXC->isExplicit())
1581  Flags |= llvm::DINode::FlagExplicit;
1582  }
1583  if (Method->hasPrototype())
1584  Flags |= llvm::DINode::FlagPrototyped;
1585  if (Method->getRefQualifier() == RQ_LValue)
1586  Flags |= llvm::DINode::FlagLValueReference;
1587  if (Method->getRefQualifier() == RQ_RValue)
1588  Flags |= llvm::DINode::FlagRValueReference;
1589  if (CGM.getLangOpts().Optimize)
1590  SPFlags |= llvm::DISubprogram::SPFlagOptimized;
1591 
1592  llvm::DINodeArray TParamsArray = CollectFunctionTemplateParams(Method, Unit);
1593  llvm::DISubprogram *SP = DBuilder.createMethod(
1594  RecordTy, MethodName, MethodLinkageName, MethodDefUnit, MethodLine,
1595  MethodTy, VIndex, ThisAdjustment, ContainingType, Flags, SPFlags,
1596  TParamsArray.get());
1597 
1598  SPCache[Method->getCanonicalDecl()].reset(SP);
1599 
1600  return SP;
1601 }
1602 
1603 void CGDebugInfo::CollectCXXMemberFunctions(
1604  const CXXRecordDecl *RD, llvm::DIFile *Unit,
1605  SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy) {
1606 
1607  // Since we want more than just the individual member decls if we
1608  // have templated functions iterate over every declaration to gather
1609  // the functions.
1610  for (const auto *I : RD->decls()) {
1611  const auto *Method = dyn_cast<CXXMethodDecl>(I);
1612  // If the member is implicit, don't add it to the member list. This avoids
1613  // the member being added to type units by LLVM, while still allowing it
1614  // to be emitted into the type declaration/reference inside the compile
1615  // unit.
1616  // Ditto 'nodebug' methods, for consistency with CodeGenFunction.cpp.
1617  // FIXME: Handle Using(Shadow?)Decls here to create
1618  // DW_TAG_imported_declarations inside the class for base decls brought into
1619  // derived classes. GDB doesn't seem to notice/leverage these when I tried
1620  // it, so I'm not rushing to fix this. (GCC seems to produce them, if
1621  // referenced)
1622  if (!Method || Method->isImplicit() || Method->hasAttr<NoDebugAttr>())
1623  continue;
1624 
1625  if (Method->getType()->getAs<FunctionProtoType>()->getContainedAutoType())
1626  continue;
1627 
1628  // Reuse the existing member function declaration if it exists.
1629  // It may be associated with the declaration of the type & should be
1630  // reused as we're building the definition.
1631  //
1632  // This situation can arise in the vtable-based debug info reduction where
1633  // implicit members are emitted in a non-vtable TU.
1634  auto MI = SPCache.find(Method->getCanonicalDecl());
1635  EltTys.push_back(MI == SPCache.end()
1636  ? CreateCXXMemberFunction(Method, Unit, RecordTy)
1637  : static_cast<llvm::Metadata *>(MI->second));
1638  }
1639 }
1640 
1641 void CGDebugInfo::CollectCXXBases(const CXXRecordDecl *RD, llvm::DIFile *Unit,
1643  llvm::DIType *RecordTy) {
1645  CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->bases(), SeenTypes,
1646  llvm::DINode::FlagZero);
1647 
1648  // If we are generating CodeView debug info, we also need to emit records for
1649  // indirect virtual base classes.
1650  if (CGM.getCodeGenOpts().EmitCodeView) {
1651  CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->vbases(), SeenTypes,
1652  llvm::DINode::FlagIndirectVirtualBase);
1653  }
1654 }
1655 
1656 void CGDebugInfo::CollectCXXBasesAux(
1657  const CXXRecordDecl *RD, llvm::DIFile *Unit,
1658  SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy,
1661  llvm::DINode::DIFlags StartingFlags) {
1662  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
1663  for (const auto &BI : Bases) {
1664  const auto *Base =
1665  cast<CXXRecordDecl>(BI.getType()->getAs<RecordType>()->getDecl());
1666  if (!SeenTypes.insert(Base).second)
1667  continue;
1668  auto *BaseTy = getOrCreateType(BI.getType(), Unit);
1669  llvm::DINode::DIFlags BFlags = StartingFlags;
1670  uint64_t BaseOffset;
1671  uint32_t VBPtrOffset = 0;
1672 
1673  if (BI.isVirtual()) {
1674  if (CGM.getTarget().getCXXABI().isItaniumFamily()) {
1675  // virtual base offset offset is -ve. The code generator emits dwarf
1676  // expression where it expects +ve number.
1677  BaseOffset = 0 - CGM.getItaniumVTableContext()
1678  .getVirtualBaseOffsetOffset(RD, Base)
1679  .getQuantity();
1680  } else {
1681  // In the MS ABI, store the vbtable offset, which is analogous to the
1682  // vbase offset offset in Itanium.
1683  BaseOffset =
1684  4 * CGM.getMicrosoftVTableContext().getVBTableIndex(RD, Base);
1685  VBPtrOffset = CGM.getContext()
1686  .getASTRecordLayout(RD)
1687  .getVBPtrOffset()
1688  .getQuantity();
1689  }
1690  BFlags |= llvm::DINode::FlagVirtual;
1691  } else
1692  BaseOffset = CGM.getContext().toBits(RL.getBaseClassOffset(Base));
1693  // FIXME: Inconsistent units for BaseOffset. It is in bytes when
1694  // BI->isVirtual() and bits when not.
1695 
1696  BFlags |= getAccessFlag(BI.getAccessSpecifier(), RD);
1697  llvm::DIType *DTy = DBuilder.createInheritance(RecordTy, BaseTy, BaseOffset,
1698  VBPtrOffset, BFlags);
1699  EltTys.push_back(DTy);
1700  }
1701 }
1702 
1703 llvm::DINodeArray
1704 CGDebugInfo::CollectTemplateParams(const TemplateParameterList *TPList,
1706  llvm::DIFile *Unit) {
1707  SmallVector<llvm::Metadata *, 16> TemplateParams;
1708  for (unsigned i = 0, e = TAList.size(); i != e; ++i) {
1709  const TemplateArgument &TA = TAList[i];
1710  StringRef Name;
1711  if (TPList)
1712  Name = TPList->getParam(i)->getName();
1713  switch (TA.getKind()) {
1714  case TemplateArgument::Type: {
1715  llvm::DIType *TTy = getOrCreateType(TA.getAsType(), Unit);
1716  TemplateParams.push_back(
1717  DBuilder.createTemplateTypeParameter(TheCU, Name, TTy));
1718  } break;
1720  llvm::DIType *TTy = getOrCreateType(TA.getIntegralType(), Unit);
1721  TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1722  TheCU, Name, TTy,
1723  llvm::ConstantInt::get(CGM.getLLVMContext(), TA.getAsIntegral())));
1724  } break;
1726  const ValueDecl *D = TA.getAsDecl();
1727  QualType T = TA.getParamTypeForDecl().getDesugaredType(CGM.getContext());
1728  llvm::DIType *TTy = getOrCreateType(T, Unit);
1729  llvm::Constant *V = nullptr;
1730  const CXXMethodDecl *MD;
1731  // Variable pointer template parameters have a value that is the address
1732  // of the variable.
1733  if (const auto *VD = dyn_cast<VarDecl>(D))
1734  V = CGM.GetAddrOfGlobalVar(VD);
1735  // Member function pointers have special support for building them, though
1736  // this is currently unsupported in LLVM CodeGen.
1737  else if ((MD = dyn_cast<CXXMethodDecl>(D)) && MD->isInstance())
1738  V = CGM.getCXXABI().EmitMemberFunctionPointer(MD);
1739  else if (const auto *FD = dyn_cast<FunctionDecl>(D))
1740  V = CGM.GetAddrOfFunction(FD);
1741  // Member data pointers have special handling too to compute the fixed
1742  // offset within the object.
1743  else if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr())) {
1744  // These five lines (& possibly the above member function pointer
1745  // handling) might be able to be refactored to use similar code in
1746  // CodeGenModule::getMemberPointerConstant
1747  uint64_t fieldOffset = CGM.getContext().getFieldOffset(D);
1748  CharUnits chars =
1749  CGM.getContext().toCharUnitsFromBits((int64_t)fieldOffset);
1750  V = CGM.getCXXABI().EmitMemberDataPointer(MPT, chars);
1751  }
1752  TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1753  TheCU, Name, TTy,
1754  cast_or_null<llvm::Constant>(V->stripPointerCasts())));
1755  } break;
1757  QualType T = TA.getNullPtrType();
1758  llvm::DIType *TTy = getOrCreateType(T, Unit);
1759  llvm::Constant *V = nullptr;
1760  // Special case member data pointer null values since they're actually -1
1761  // instead of zero.
1762  if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr()))
1763  // But treat member function pointers as simple zero integers because
1764  // it's easier than having a special case in LLVM's CodeGen. If LLVM
1765  // CodeGen grows handling for values of non-null member function
1766  // pointers then perhaps we could remove this special case and rely on
1767  // EmitNullMemberPointer for member function pointers.
1768  if (MPT->isMemberDataPointer())
1769  V = CGM.getCXXABI().EmitNullMemberPointer(MPT);
1770  if (!V)
1771  V = llvm::ConstantInt::get(CGM.Int8Ty, 0);
1772  TemplateParams.push_back(
1773  DBuilder.createTemplateValueParameter(TheCU, Name, TTy, V));
1774  } break;
1776  TemplateParams.push_back(DBuilder.createTemplateTemplateParameter(
1777  TheCU, Name, nullptr,
1779  break;
1781  TemplateParams.push_back(DBuilder.createTemplateParameterPack(
1782  TheCU, Name, nullptr,
1783  CollectTemplateParams(nullptr, TA.getPackAsArray(), Unit)));
1784  break;
1786  const Expr *E = TA.getAsExpr();
1787  QualType T = E->getType();
1788  if (E->isGLValue())
1789  T = CGM.getContext().getLValueReferenceType(T);
1790  llvm::Constant *V = ConstantEmitter(CGM).emitAbstract(E, T);
1791  assert(V && "Expression in template argument isn't constant");
1792  llvm::DIType *TTy = getOrCreateType(T, Unit);
1793  TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1794  TheCU, Name, TTy, V->stripPointerCasts()));
1795  } break;
1796  // And the following should never occur:
1799  llvm_unreachable(
1800  "These argument types shouldn't exist in concrete types");
1801  }
1802  }
1803  return DBuilder.getOrCreateArray(TemplateParams);
1804 }
1805 
1806 llvm::DINodeArray
1807 CGDebugInfo::CollectFunctionTemplateParams(const FunctionDecl *FD,
1808  llvm::DIFile *Unit) {
1809  if (FD->getTemplatedKind() ==
1812  ->getTemplate()
1814  return CollectTemplateParams(
1815  TList, FD->getTemplateSpecializationArgs()->asArray(), Unit);
1816  }
1817  return llvm::DINodeArray();
1818 }
1819 
1820 llvm::DINodeArray CGDebugInfo::CollectVarTemplateParams(const VarDecl *VL,
1821  llvm::DIFile *Unit) {
1822  if (auto *TS = dyn_cast<VarTemplateSpecializationDecl>(VL)) {
1823  auto T = TS->getSpecializedTemplateOrPartial();
1824  auto TA = TS->getTemplateArgs().asArray();
1825  // Collect parameters for a partial specialization
1826  if (T.is<VarTemplatePartialSpecializationDecl *>()) {
1827  const TemplateParameterList *TList =
1829  ->getTemplateParameters();
1830  return CollectTemplateParams(TList, TA, Unit);
1831  }
1832 
1833  // Collect parameters for an explicit specialization
1834  if (T.is<VarTemplateDecl *>()) {
1835  const TemplateParameterList *TList = T.get<VarTemplateDecl *>()
1836  ->getTemplateParameters();
1837  return CollectTemplateParams(TList, TA, Unit);
1838  }
1839  }
1840  return llvm::DINodeArray();
1841 }
1842 
1843 llvm::DINodeArray CGDebugInfo::CollectCXXTemplateParams(
1844  const ClassTemplateSpecializationDecl *TSpecial, llvm::DIFile *Unit) {
1845  // Always get the full list of parameters, not just the ones from
1846  // the specialization.
1847  TemplateParameterList *TPList =
1849  const TemplateArgumentList &TAList = TSpecial->getTemplateArgs();
1850  return CollectTemplateParams(TPList, TAList.asArray(), Unit);
1851 }
1852 
1853 llvm::DIType *CGDebugInfo::getOrCreateVTablePtrType(llvm::DIFile *Unit) {
1854  if (VTablePtrType)
1855  return VTablePtrType;
1856 
1857  ASTContext &Context = CGM.getContext();
1858 
1859  /* Function type */
1860  llvm::Metadata *STy = getOrCreateType(Context.IntTy, Unit);
1861  llvm::DITypeRefArray SElements = DBuilder.getOrCreateTypeArray(STy);
1862  llvm::DIType *SubTy = DBuilder.createSubroutineType(SElements);
1863  unsigned Size = Context.getTypeSize(Context.VoidPtrTy);
1864  unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace();
1865  Optional<unsigned> DWARFAddressSpace =
1866  CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace);
1867 
1868  llvm::DIType *vtbl_ptr_type = DBuilder.createPointerType(
1869  SubTy, Size, 0, DWARFAddressSpace, "__vtbl_ptr_type");
1870  VTablePtrType = DBuilder.createPointerType(vtbl_ptr_type, Size);
1871  return VTablePtrType;
1872 }
1873 
1874 StringRef CGDebugInfo::getVTableName(const CXXRecordDecl *RD) {
1875  // Copy the gdb compatible name on the side and use its reference.
1876  return internString("_vptr$", RD->getNameAsString());
1877 }
1878 
1879 void CGDebugInfo::CollectVTableInfo(const CXXRecordDecl *RD, llvm::DIFile *Unit,
1881  llvm::DICompositeType *RecordTy) {
1882  // If this class is not dynamic then there is not any vtable info to collect.
1883  if (!RD->isDynamicClass())
1884  return;
1885 
1886  // Don't emit any vtable shape or vptr info if this class doesn't have an
1887  // extendable vfptr. This can happen if the class doesn't have virtual
1888  // methods, or in the MS ABI if those virtual methods only come from virtually
1889  // inherited bases.
1890  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
1891  if (!RL.hasExtendableVFPtr())
1892  return;
1893 
1894  // CodeView needs to know how large the vtable of every dynamic class is, so
1895  // emit a special named pointer type into the element list. The vptr type
1896  // points to this type as well.
1897  llvm::DIType *VPtrTy = nullptr;
1898  bool NeedVTableShape = CGM.getCodeGenOpts().EmitCodeView &&
1899  CGM.getTarget().getCXXABI().isMicrosoft();
1900  if (NeedVTableShape) {
1901  uint64_t PtrWidth =
1902  CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
1903  const VTableLayout &VFTLayout =
1904  CGM.getMicrosoftVTableContext().getVFTableLayout(RD, CharUnits::Zero());
1905  unsigned VSlotCount =
1906  VFTLayout.vtable_components().size() - CGM.getLangOpts().RTTIData;
1907  unsigned VTableWidth = PtrWidth * VSlotCount;
1908  unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace();
1909  Optional<unsigned> DWARFAddressSpace =
1910  CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace);
1911 
1912  // Create a very wide void* type and insert it directly in the element list.
1913  llvm::DIType *VTableType = DBuilder.createPointerType(
1914  nullptr, VTableWidth, 0, DWARFAddressSpace, "__vtbl_ptr_type");
1915  EltTys.push_back(VTableType);
1916 
1917  // The vptr is a pointer to this special vtable type.
1918  VPtrTy = DBuilder.createPointerType(VTableType, PtrWidth);
1919  }
1920 
1921  // If there is a primary base then the artificial vptr member lives there.
1922  if (RL.getPrimaryBase())
1923  return;
1924 
1925  if (!VPtrTy)
1926  VPtrTy = getOrCreateVTablePtrType(Unit);
1927 
1928  unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
1929  llvm::DIType *VPtrMember =
1930  DBuilder.createMemberType(Unit, getVTableName(RD), Unit, 0, Size, 0, 0,
1931  llvm::DINode::FlagArtificial, VPtrTy);
1932  EltTys.push_back(VPtrMember);
1933 }
1934 
1936  SourceLocation Loc) {
1937  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
1938  llvm::DIType *T = getOrCreateType(RTy, getOrCreateFile(Loc));
1939  return T;
1940 }
1941 
1943  SourceLocation Loc) {
1944  return getOrCreateStandaloneType(D, Loc);
1945 }
1946 
1948  SourceLocation Loc) {
1949  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
1950  assert(!D.isNull() && "null type");
1951  llvm::DIType *T = getOrCreateType(D, getOrCreateFile(Loc));
1952  assert(T && "could not create debug info for type");
1953 
1954  RetainedTypes.push_back(D.getAsOpaquePtr());
1955  return T;
1956 }
1957 
1959  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
1960  return;
1961  QualType Ty = CGM.getContext().getEnumType(ED);
1962  void *TyPtr = Ty.getAsOpaquePtr();
1963  auto I = TypeCache.find(TyPtr);
1964  if (I == TypeCache.end() || !cast<llvm::DIType>(I->second)->isForwardDecl())
1965  return;
1966  llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<EnumType>());
1967  assert(!Res->isForwardDecl());
1968  TypeCache[TyPtr].reset(Res);
1969 }
1970 
1972  if (DebugKind > codegenoptions::LimitedDebugInfo ||
1973  !CGM.getLangOpts().CPlusPlus)
1974  completeRequiredType(RD);
1975 }
1976 
1977 /// Return true if the class or any of its methods are marked dllimport.
1978 static bool isClassOrMethodDLLImport(const CXXRecordDecl *RD) {
1979  if (RD->hasAttr<DLLImportAttr>())
1980  return true;
1981  for (const CXXMethodDecl *MD : RD->methods())
1982  if (MD->hasAttr<DLLImportAttr>())
1983  return true;
1984  return false;
1985 }
1986 
1987 /// Does a type definition exist in an imported clang module?
1988 static bool isDefinedInClangModule(const RecordDecl *RD) {
1989  // Only definitions that where imported from an AST file come from a module.
1990  if (!RD || !RD->isFromASTFile())
1991  return false;
1992  // Anonymous entities cannot be addressed. Treat them as not from module.
1993  if (!RD->isExternallyVisible() && RD->getName().empty())
1994  return false;
1995  if (auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) {
1996  if (!CXXDecl->isCompleteDefinition())
1997  return false;
1998  // Check wether RD is a template.
1999  auto TemplateKind = CXXDecl->getTemplateSpecializationKind();
2000  if (TemplateKind != TSK_Undeclared) {
2001  // Unfortunately getOwningModule() isn't accurate enough to find the
2002  // owning module of a ClassTemplateSpecializationDecl that is inside a
2003  // namespace spanning multiple modules.
2004  bool Explicit = false;
2005  if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(CXXDecl))
2006  Explicit = TD->isExplicitInstantiationOrSpecialization();
2007  if (!Explicit && CXXDecl->getEnclosingNamespaceContext())
2008  return false;
2009  // This is a template, check the origin of the first member.
2010  if (CXXDecl->field_begin() == CXXDecl->field_end())
2011  return TemplateKind == TSK_ExplicitInstantiationDeclaration;
2012  if (!CXXDecl->field_begin()->isFromASTFile())
2013  return false;
2014  }
2015  }
2016  return true;
2017 }
2018 
2020  if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD))
2021  if (CXXRD->isDynamicClass() &&
2022  CGM.getVTableLinkage(CXXRD) ==
2023  llvm::GlobalValue::AvailableExternallyLinkage &&
2024  !isClassOrMethodDLLImport(CXXRD))
2025  return;
2026 
2027  if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition()))
2028  return;
2029 
2030  completeClass(RD);
2031 }
2032 
2034  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2035  return;
2036  QualType Ty = CGM.getContext().getRecordType(RD);
2037  void *TyPtr = Ty.getAsOpaquePtr();
2038  auto I = TypeCache.find(TyPtr);
2039  if (I != TypeCache.end() && !cast<llvm::DIType>(I->second)->isForwardDecl())
2040  return;
2041  llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<RecordType>());
2042  assert(!Res->isForwardDecl());
2043  TypeCache[TyPtr].reset(Res);
2044 }
2045 
2048  for (CXXMethodDecl *MD : llvm::make_range(I, End))
2050  if (!Tmpl->isImplicit() && Tmpl->isThisDeclarationADefinition() &&
2051  !MD->getMemberSpecializationInfo()->isExplicitSpecialization())
2052  return true;
2053  return false;
2054 }
2055 
2057  bool DebugTypeExtRefs, const RecordDecl *RD,
2058  const LangOptions &LangOpts) {
2059  if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition()))
2060  return true;
2061 
2062  if (auto *ES = RD->getASTContext().getExternalSource())
2063  if (ES->hasExternalDefinitions(RD) == ExternalASTSource::EK_Always)
2064  return true;
2065 
2066  if (DebugKind > codegenoptions::LimitedDebugInfo)
2067  return false;
2068 
2069  if (!LangOpts.CPlusPlus)
2070  return false;
2071 
2072  if (!RD->isCompleteDefinitionRequired())
2073  return true;
2074 
2075  const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
2076 
2077  if (!CXXDecl)
2078  return false;
2079 
2080  // Only emit complete debug info for a dynamic class when its vtable is
2081  // emitted. However, Microsoft debuggers don't resolve type information
2082  // across DLL boundaries, so skip this optimization if the class or any of its
2083  // methods are marked dllimport. This isn't a complete solution, since objects
2084  // without any dllimport methods can be used in one DLL and constructed in
2085  // another, but it is the current behavior of LimitedDebugInfo.
2086  if (CXXDecl->hasDefinition() && CXXDecl->isDynamicClass() &&
2087  !isClassOrMethodDLLImport(CXXDecl))
2088  return true;
2089 
2091  if (const auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD))
2092  Spec = SD->getSpecializationKind();
2093 
2096  CXXDecl->method_end()))
2097  return true;
2098 
2099  return false;
2100 }
2101 
2103  if (shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, CGM.getLangOpts()))
2104  return;
2105 
2106  QualType Ty = CGM.getContext().getRecordType(RD);
2107  llvm::DIType *T = getTypeOrNull(Ty);
2108  if (T && T->isForwardDecl())
2109  completeClassData(RD);
2110 }
2111 
2112 llvm::DIType *CGDebugInfo::CreateType(const RecordType *Ty) {
2113  RecordDecl *RD = Ty->getDecl();
2114  llvm::DIType *T = cast_or_null<llvm::DIType>(getTypeOrNull(QualType(Ty, 0)));
2115  if (T || shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD,
2116  CGM.getLangOpts())) {
2117  if (!T)
2118  T = getOrCreateRecordFwdDecl(Ty, getDeclContextDescriptor(RD));
2119  return T;
2120  }
2121 
2122  return CreateTypeDefinition(Ty);
2123 }
2124 
2125 llvm::DIType *CGDebugInfo::CreateTypeDefinition(const RecordType *Ty) {
2126  RecordDecl *RD = Ty->getDecl();
2127 
2128  // Get overall information about the record type for the debug info.
2129  llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
2130 
2131  // Records and classes and unions can all be recursive. To handle them, we
2132  // first generate a debug descriptor for the struct as a forward declaration.
2133  // Then (if it is a definition) we go through and get debug info for all of
2134  // its members. Finally, we create a descriptor for the complete type (which
2135  // may refer to the forward decl if the struct is recursive) and replace all
2136  // uses of the forward declaration with the final definition.
2137  llvm::DICompositeType *FwdDecl = getOrCreateLimitedType(Ty, DefUnit);
2138 
2139  const RecordDecl *D = RD->getDefinition();
2140  if (!D || !D->isCompleteDefinition())
2141  return FwdDecl;
2142 
2143  if (const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD))
2144  CollectContainingType(CXXDecl, FwdDecl);
2145 
2146  // Push the struct on region stack.
2147  LexicalBlockStack.emplace_back(&*FwdDecl);
2148  RegionMap[Ty->getDecl()].reset(FwdDecl);
2149 
2150  // Convert all the elements.
2152  // what about nested types?
2153 
2154  // Note: The split of CXXDecl information here is intentional, the
2155  // gdb tests will depend on a certain ordering at printout. The debug
2156  // information offsets are still correct if we merge them all together
2157  // though.
2158  const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
2159  if (CXXDecl) {
2160  CollectCXXBases(CXXDecl, DefUnit, EltTys, FwdDecl);
2161  CollectVTableInfo(CXXDecl, DefUnit, EltTys, FwdDecl);
2162  }
2163 
2164  // Collect data fields (including static variables and any initializers).
2165  CollectRecordFields(RD, DefUnit, EltTys, FwdDecl);
2166  if (CXXDecl)
2167  CollectCXXMemberFunctions(CXXDecl, DefUnit, EltTys, FwdDecl);
2168 
2169  LexicalBlockStack.pop_back();
2170  RegionMap.erase(Ty->getDecl());
2171 
2172  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
2173  DBuilder.replaceArrays(FwdDecl, Elements);
2174 
2175  if (FwdDecl->isTemporary())
2176  FwdDecl =
2177  llvm::MDNode::replaceWithPermanent(llvm::TempDICompositeType(FwdDecl));
2178 
2179  RegionMap[Ty->getDecl()].reset(FwdDecl);
2180  return FwdDecl;
2181 }
2182 
2183 llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectType *Ty,
2184  llvm::DIFile *Unit) {
2185  // Ignore protocols.
2186  return getOrCreateType(Ty->getBaseType(), Unit);
2187 }
2188 
2189 llvm::DIType *CGDebugInfo::CreateType(const ObjCTypeParamType *Ty,
2190  llvm::DIFile *Unit) {
2191  // Ignore protocols.
2192  SourceLocation Loc = Ty->getDecl()->getLocation();
2193 
2194  // Use Typedefs to represent ObjCTypeParamType.
2195  return DBuilder.createTypedef(
2196  getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit),
2197  Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc),
2198  getDeclContextDescriptor(Ty->getDecl()));
2199 }
2200 
2201 /// \return true if Getter has the default name for the property PD.
2203  const ObjCMethodDecl *Getter) {
2204  assert(PD);
2205  if (!Getter)
2206  return true;
2207 
2208  assert(Getter->getDeclName().isObjCZeroArgSelector());
2209  return PD->getName() ==
2211 }
2212 
2213 /// \return true if Setter has the default name for the property PD.
2215  const ObjCMethodDecl *Setter) {
2216  assert(PD);
2217  if (!Setter)
2218  return true;
2219 
2220  assert(Setter->getDeclName().isObjCOneArgSelector());
2223 }
2224 
2225 llvm::DIType *CGDebugInfo::CreateType(const ObjCInterfaceType *Ty,
2226  llvm::DIFile *Unit) {
2227  ObjCInterfaceDecl *ID = Ty->getDecl();
2228  if (!ID)
2229  return nullptr;
2230 
2231  // Return a forward declaration if this type was imported from a clang module,
2232  // and this is not the compile unit with the implementation of the type (which
2233  // may contain hidden ivars).
2234  if (DebugTypeExtRefs && ID->isFromASTFile() && ID->getDefinition() &&
2235  !ID->getImplementation())
2236  return DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
2237  ID->getName(),
2238  getDeclContextDescriptor(ID), Unit, 0);
2239 
2240  // Get overall information about the record type for the debug info.
2241  llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation());
2242  unsigned Line = getLineNumber(ID->getLocation());
2243  auto RuntimeLang =
2244  static_cast<llvm::dwarf::SourceLanguage>(TheCU->getSourceLanguage());
2245 
2246  // If this is just a forward declaration return a special forward-declaration
2247  // debug type since we won't be able to lay out the entire type.
2248  ObjCInterfaceDecl *Def = ID->getDefinition();
2249  if (!Def || !Def->getImplementation()) {
2250  llvm::DIScope *Mod = getParentModuleOrNull(ID);
2251  llvm::DIType *FwdDecl = DBuilder.createReplaceableCompositeType(
2252  llvm::dwarf::DW_TAG_structure_type, ID->getName(), Mod ? Mod : TheCU,
2253  DefUnit, Line, RuntimeLang);
2254  ObjCInterfaceCache.push_back(ObjCInterfaceCacheEntry(Ty, FwdDecl, Unit));
2255  return FwdDecl;
2256  }
2257 
2258  return CreateTypeDefinition(Ty, Unit);
2259 }
2260 
2261 llvm::DIModule *
2262 CGDebugInfo::getOrCreateModuleRef(ExternalASTSource::ASTSourceDescriptor Mod,
2263  bool CreateSkeletonCU) {
2264  // Use the Module pointer as the key into the cache. This is a
2265  // nullptr if the "Module" is a PCH, which is safe because we don't
2266  // support chained PCH debug info, so there can only be a single PCH.
2267  const Module *M = Mod.getModuleOrNull();
2268  auto ModRef = ModuleCache.find(M);
2269  if (ModRef != ModuleCache.end())
2270  return cast<llvm::DIModule>(ModRef->second);
2271 
2272  // Macro definitions that were defined with "-D" on the command line.
2273  SmallString<128> ConfigMacros;
2274  {
2275  llvm::raw_svector_ostream OS(ConfigMacros);
2276  const auto &PPOpts = CGM.getPreprocessorOpts();
2277  unsigned I = 0;
2278  // Translate the macro definitions back into a command line.
2279  for (auto &M : PPOpts.Macros) {
2280  if (++I > 1)
2281  OS << " ";
2282  const std::string &Macro = M.first;
2283  bool Undef = M.second;
2284  OS << "\"-" << (Undef ? 'U' : 'D');
2285  for (char c : Macro)
2286  switch (c) {
2287  case '\\':
2288  OS << "\\\\";
2289  break;
2290  case '"':
2291  OS << "\\\"";
2292  break;
2293  default:
2294  OS << c;
2295  }
2296  OS << '\"';
2297  }
2298  }
2299 
2300  bool IsRootModule = M ? !M->Parent : true;
2301  if (CreateSkeletonCU && IsRootModule) {
2302  // PCH files don't have a signature field in the control block,
2303  // but LLVM detects skeleton CUs by looking for a non-zero DWO id.
2304  // We use the lower 64 bits for debug info.
2305  uint64_t Signature =
2306  Mod.getSignature()
2307  ? (uint64_t)Mod.getSignature()[1] << 32 | Mod.getSignature()[0]
2308  : ~1ULL;
2309  llvm::DIBuilder DIB(CGM.getModule());
2310  DIB.createCompileUnit(TheCU->getSourceLanguage(),
2311  // TODO: Support "Source" from external AST providers?
2312  DIB.createFile(Mod.getModuleName(), Mod.getPath()),
2313  TheCU->getProducer(), true, StringRef(), 0,
2314  Mod.getASTFile(), llvm::DICompileUnit::FullDebug,
2315  Signature);
2316  DIB.finalize();
2317  }
2318  llvm::DIModule *Parent =
2319  IsRootModule ? nullptr
2320  : getOrCreateModuleRef(
2322  CreateSkeletonCU);
2323  llvm::DIModule *DIMod =
2324  DBuilder.createModule(Parent, Mod.getModuleName(), ConfigMacros,
2325  Mod.getPath(), CGM.getHeaderSearchOpts().Sysroot);
2326  ModuleCache[M].reset(DIMod);
2327  return DIMod;
2328 }
2329 
2330 llvm::DIType *CGDebugInfo::CreateTypeDefinition(const ObjCInterfaceType *Ty,
2331  llvm::DIFile *Unit) {
2332  ObjCInterfaceDecl *ID = Ty->getDecl();
2333  llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation());
2334  unsigned Line = getLineNumber(ID->getLocation());
2335  unsigned RuntimeLang = TheCU->getSourceLanguage();
2336 
2337  // Bit size, align and offset of the type.
2338  uint64_t Size = CGM.getContext().getTypeSize(Ty);
2339  auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2340 
2341  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2342  if (ID->getImplementation())
2343  Flags |= llvm::DINode::FlagObjcClassComplete;
2344 
2345  llvm::DIScope *Mod = getParentModuleOrNull(ID);
2346  llvm::DICompositeType *RealDecl = DBuilder.createStructType(
2347  Mod ? Mod : Unit, ID->getName(), DefUnit, Line, Size, Align, Flags,
2348  nullptr, llvm::DINodeArray(), RuntimeLang);
2349 
2350  QualType QTy(Ty, 0);
2351  TypeCache[QTy.getAsOpaquePtr()].reset(RealDecl);
2352 
2353  // Push the struct on region stack.
2354  LexicalBlockStack.emplace_back(RealDecl);
2355  RegionMap[Ty->getDecl()].reset(RealDecl);
2356 
2357  // Convert all the elements.
2359 
2360  ObjCInterfaceDecl *SClass = ID->getSuperClass();
2361  if (SClass) {
2362  llvm::DIType *SClassTy =
2363  getOrCreateType(CGM.getContext().getObjCInterfaceType(SClass), Unit);
2364  if (!SClassTy)
2365  return nullptr;
2366 
2367  llvm::DIType *InhTag = DBuilder.createInheritance(RealDecl, SClassTy, 0, 0,
2368  llvm::DINode::FlagZero);
2369  EltTys.push_back(InhTag);
2370  }
2371 
2372  // Create entries for all of the properties.
2373  auto AddProperty = [&](const ObjCPropertyDecl *PD) {
2374  SourceLocation Loc = PD->getLocation();
2375  llvm::DIFile *PUnit = getOrCreateFile(Loc);
2376  unsigned PLine = getLineNumber(Loc);
2377  ObjCMethodDecl *Getter = PD->getGetterMethodDecl();
2378  ObjCMethodDecl *Setter = PD->getSetterMethodDecl();
2379  llvm::MDNode *PropertyNode = DBuilder.createObjCProperty(
2380  PD->getName(), PUnit, PLine,
2381  hasDefaultGetterName(PD, Getter) ? ""
2382  : getSelectorName(PD->getGetterName()),
2383  hasDefaultSetterName(PD, Setter) ? ""
2384  : getSelectorName(PD->getSetterName()),
2385  PD->getPropertyAttributes(), getOrCreateType(PD->getType(), PUnit));
2386  EltTys.push_back(PropertyNode);
2387  };
2388  {
2389  llvm::SmallPtrSet<const IdentifierInfo *, 16> PropertySet;
2390  for (const ObjCCategoryDecl *ClassExt : ID->known_extensions())
2391  for (auto *PD : ClassExt->properties()) {
2392  PropertySet.insert(PD->getIdentifier());
2393  AddProperty(PD);
2394  }
2395  for (const auto *PD : ID->properties()) {
2396  // Don't emit duplicate metadata for properties that were already in a
2397  // class extension.
2398  if (!PropertySet.insert(PD->getIdentifier()).second)
2399  continue;
2400  AddProperty(PD);
2401  }
2402  }
2403 
2404  const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID);
2405  unsigned FieldNo = 0;
2406  for (ObjCIvarDecl *Field = ID->all_declared_ivar_begin(); Field;
2407  Field = Field->getNextIvar(), ++FieldNo) {
2408  llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
2409  if (!FieldTy)
2410  return nullptr;
2411 
2412  StringRef FieldName = Field->getName();
2413 
2414  // Ignore unnamed fields.
2415  if (FieldName.empty())
2416  continue;
2417 
2418  // Get the location for the field.
2419  llvm::DIFile *FieldDefUnit = getOrCreateFile(Field->getLocation());
2420  unsigned FieldLine = getLineNumber(Field->getLocation());
2421  QualType FType = Field->getType();
2422  uint64_t FieldSize = 0;
2423  uint32_t FieldAlign = 0;
2424 
2425  if (!FType->isIncompleteArrayType()) {
2426 
2427  // Bit size, align and offset of the type.
2428  FieldSize = Field->isBitField()
2429  ? Field->getBitWidthValue(CGM.getContext())
2430  : CGM.getContext().getTypeSize(FType);
2431  FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext());
2432  }
2433 
2434  uint64_t FieldOffset;
2435  if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) {
2436  // We don't know the runtime offset of an ivar if we're using the
2437  // non-fragile ABI. For bitfields, use the bit offset into the first
2438  // byte of storage of the bitfield. For other fields, use zero.
2439  if (Field->isBitField()) {
2440  FieldOffset =
2441  CGM.getObjCRuntime().ComputeBitfieldBitOffset(CGM, ID, Field);
2442  FieldOffset %= CGM.getContext().getCharWidth();
2443  } else {
2444  FieldOffset = 0;
2445  }
2446  } else {
2447  FieldOffset = RL.getFieldOffset(FieldNo);
2448  }
2449 
2450  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2451  if (Field->getAccessControl() == ObjCIvarDecl::Protected)
2452  Flags = llvm::DINode::FlagProtected;
2453  else if (Field->getAccessControl() == ObjCIvarDecl::Private)
2454  Flags = llvm::DINode::FlagPrivate;
2455  else if (Field->getAccessControl() == ObjCIvarDecl::Public)
2456  Flags = llvm::DINode::FlagPublic;
2457 
2458  llvm::MDNode *PropertyNode = nullptr;
2459  if (ObjCImplementationDecl *ImpD = ID->getImplementation()) {
2460  if (ObjCPropertyImplDecl *PImpD =
2461  ImpD->FindPropertyImplIvarDecl(Field->getIdentifier())) {
2462  if (ObjCPropertyDecl *PD = PImpD->getPropertyDecl()) {
2463  SourceLocation Loc = PD->getLocation();
2464  llvm::DIFile *PUnit = getOrCreateFile(Loc);
2465  unsigned PLine = getLineNumber(Loc);
2466  ObjCMethodDecl *Getter = PD->getGetterMethodDecl();
2467  ObjCMethodDecl *Setter = PD->getSetterMethodDecl();
2468  PropertyNode = DBuilder.createObjCProperty(
2469  PD->getName(), PUnit, PLine,
2470  hasDefaultGetterName(PD, Getter)
2471  ? ""
2472  : getSelectorName(PD->getGetterName()),
2473  hasDefaultSetterName(PD, Setter)
2474  ? ""
2475  : getSelectorName(PD->getSetterName()),
2476  PD->getPropertyAttributes(),
2477  getOrCreateType(PD->getType(), PUnit));
2478  }
2479  }
2480  }
2481  FieldTy = DBuilder.createObjCIVar(FieldName, FieldDefUnit, FieldLine,
2482  FieldSize, FieldAlign, FieldOffset, Flags,
2483  FieldTy, PropertyNode);
2484  EltTys.push_back(FieldTy);
2485  }
2486 
2487  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
2488  DBuilder.replaceArrays(RealDecl, Elements);
2489 
2490  LexicalBlockStack.pop_back();
2491  return RealDecl;
2492 }
2493 
2494 llvm::DIType *CGDebugInfo::CreateType(const VectorType *Ty,
2495  llvm::DIFile *Unit) {
2496  llvm::DIType *ElementTy = getOrCreateType(Ty->getElementType(), Unit);
2497  int64_t Count = Ty->getNumElements();
2498 
2499  llvm::Metadata *Subscript;
2500  QualType QTy(Ty, 0);
2501  auto SizeExpr = SizeExprCache.find(QTy);
2502  if (SizeExpr != SizeExprCache.end())
2503  Subscript = DBuilder.getOrCreateSubrange(0, SizeExpr->getSecond());
2504  else
2505  Subscript = DBuilder.getOrCreateSubrange(0, Count ? Count : -1);
2506  llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscript);
2507 
2508  uint64_t Size = CGM.getContext().getTypeSize(Ty);
2509  auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2510 
2511  return DBuilder.createVectorType(Size, Align, ElementTy, SubscriptArray);
2512 }
2513 
2514 llvm::DIType *CGDebugInfo::CreateType(const ArrayType *Ty, llvm::DIFile *Unit) {
2515  uint64_t Size;
2516  uint32_t Align;
2517 
2518  // FIXME: make getTypeAlign() aware of VLAs and incomplete array types
2519  if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) {
2520  Size = 0;
2521  Align = getTypeAlignIfRequired(CGM.getContext().getBaseElementType(VAT),
2522  CGM.getContext());
2523  } else if (Ty->isIncompleteArrayType()) {
2524  Size = 0;
2525  if (Ty->getElementType()->isIncompleteType())
2526  Align = 0;
2527  else
2528  Align = getTypeAlignIfRequired(Ty->getElementType(), CGM.getContext());
2529  } else if (Ty->isIncompleteType()) {
2530  Size = 0;
2531  Align = 0;
2532  } else {
2533  // Size and align of the whole array, not the element type.
2534  Size = CGM.getContext().getTypeSize(Ty);
2535  Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2536  }
2537 
2538  // Add the dimensions of the array. FIXME: This loses CV qualifiers from
2539  // interior arrays, do we care? Why aren't nested arrays represented the
2540  // obvious/recursive way?
2542  QualType EltTy(Ty, 0);
2543  while ((Ty = dyn_cast<ArrayType>(EltTy))) {
2544  // If the number of elements is known, then count is that number. Otherwise,
2545  // it's -1. This allows us to represent a subrange with an array of 0
2546  // elements, like this:
2547  //
2548  // struct foo {
2549  // int x[0];
2550  // };
2551  int64_t Count = -1; // Count == -1 is an unbounded array.
2552  if (const auto *CAT = dyn_cast<ConstantArrayType>(Ty))
2553  Count = CAT->getSize().getZExtValue();
2554  else if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) {
2555  if (Expr *Size = VAT->getSizeExpr()) {
2556  Expr::EvalResult Result;
2557  if (Size->EvaluateAsInt(Result, CGM.getContext()))
2558  Count = Result.Val.getInt().getExtValue();
2559  }
2560  }
2561 
2562  auto SizeNode = SizeExprCache.find(EltTy);
2563  if (SizeNode != SizeExprCache.end())
2564  Subscripts.push_back(
2565  DBuilder.getOrCreateSubrange(0, SizeNode->getSecond()));
2566  else
2567  Subscripts.push_back(DBuilder.getOrCreateSubrange(0, Count));
2568  EltTy = Ty->getElementType();
2569  }
2570 
2571  llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscripts);
2572 
2573  return DBuilder.createArrayType(Size, Align, getOrCreateType(EltTy, Unit),
2574  SubscriptArray);
2575 }
2576 
2577 llvm::DIType *CGDebugInfo::CreateType(const LValueReferenceType *Ty,
2578  llvm::DIFile *Unit) {
2579  return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type, Ty,
2580  Ty->getPointeeType(), Unit);
2581 }
2582 
2583 llvm::DIType *CGDebugInfo::CreateType(const RValueReferenceType *Ty,
2584  llvm::DIFile *Unit) {
2585  return CreatePointerLikeType(llvm::dwarf::DW_TAG_rvalue_reference_type, Ty,
2586  Ty->getPointeeType(), Unit);
2587 }
2588 
2589 llvm::DIType *CGDebugInfo::CreateType(const MemberPointerType *Ty,
2590  llvm::DIFile *U) {
2591  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2592  uint64_t Size = 0;
2593 
2594  if (!Ty->isIncompleteType()) {
2595  Size = CGM.getContext().getTypeSize(Ty);
2596 
2597  // Set the MS inheritance model. There is no flag for the unspecified model.
2598  if (CGM.getTarget().getCXXABI().isMicrosoft()) {
2600  case MSInheritanceAttr::Keyword_single_inheritance:
2601  Flags |= llvm::DINode::FlagSingleInheritance;
2602  break;
2603  case MSInheritanceAttr::Keyword_multiple_inheritance:
2604  Flags |= llvm::DINode::FlagMultipleInheritance;
2605  break;
2606  case MSInheritanceAttr::Keyword_virtual_inheritance:
2607  Flags |= llvm::DINode::FlagVirtualInheritance;
2608  break;
2609  case MSInheritanceAttr::Keyword_unspecified_inheritance:
2610  break;
2611  }
2612  }
2613  }
2614 
2615  llvm::DIType *ClassType = getOrCreateType(QualType(Ty->getClass(), 0), U);
2616  if (Ty->isMemberDataPointerType())
2617  return DBuilder.createMemberPointerType(
2618  getOrCreateType(Ty->getPointeeType(), U), ClassType, Size, /*Align=*/0,
2619  Flags);
2620 
2621  const FunctionProtoType *FPT =
2623  return DBuilder.createMemberPointerType(
2624  getOrCreateInstanceMethodType(
2626  FPT, U),
2627  ClassType, Size, /*Align=*/0, Flags);
2628 }
2629 
2630 llvm::DIType *CGDebugInfo::CreateType(const AtomicType *Ty, llvm::DIFile *U) {
2631  auto *FromTy = getOrCreateType(Ty->getValueType(), U);
2632  return DBuilder.createQualifiedType(llvm::dwarf::DW_TAG_atomic_type, FromTy);
2633 }
2634 
2635 llvm::DIType *CGDebugInfo::CreateType(const PipeType *Ty, llvm::DIFile *U) {
2636  return getOrCreateType(Ty->getElementType(), U);
2637 }
2638 
2639 llvm::DIType *CGDebugInfo::CreateEnumType(const EnumType *Ty) {
2640  const EnumDecl *ED = Ty->getDecl();
2641 
2642  uint64_t Size = 0;
2643  uint32_t Align = 0;
2644  if (!ED->getTypeForDecl()->isIncompleteType()) {
2645  Size = CGM.getContext().getTypeSize(ED->getTypeForDecl());
2646  Align = getDeclAlignIfRequired(ED, CGM.getContext());
2647  }
2648 
2649  SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
2650 
2651  bool isImportedFromModule =
2652  DebugTypeExtRefs && ED->isFromASTFile() && ED->getDefinition();
2653 
2654  // If this is just a forward declaration, construct an appropriately
2655  // marked node and just return it.
2656  if (isImportedFromModule || !ED->getDefinition()) {
2657  // Note that it is possible for enums to be created as part of
2658  // their own declcontext. In this case a FwdDecl will be created
2659  // twice. This doesn't cause a problem because both FwdDecls are
2660  // entered into the ReplaceMap: finalize() will replace the first
2661  // FwdDecl with the second and then replace the second with
2662  // complete type.
2663  llvm::DIScope *EDContext = getDeclContextDescriptor(ED);
2664  llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
2665  llvm::TempDIScope TmpContext(DBuilder.createReplaceableCompositeType(
2666  llvm::dwarf::DW_TAG_enumeration_type, "", TheCU, DefUnit, 0));
2667 
2668  unsigned Line = getLineNumber(ED->getLocation());
2669  StringRef EDName = ED->getName();
2670  llvm::DIType *RetTy = DBuilder.createReplaceableCompositeType(
2671  llvm::dwarf::DW_TAG_enumeration_type, EDName, EDContext, DefUnit, Line,
2672  0, Size, Align, llvm::DINode::FlagFwdDecl, Identifier);
2673 
2674  ReplaceMap.emplace_back(
2675  std::piecewise_construct, std::make_tuple(Ty),
2676  std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
2677  return RetTy;
2678  }
2679 
2680  return CreateTypeDefinition(Ty);
2681 }
2682 
2683 llvm::DIType *CGDebugInfo::CreateTypeDefinition(const EnumType *Ty) {
2684  const EnumDecl *ED = Ty->getDecl();
2685  uint64_t Size = 0;
2686  uint32_t Align = 0;
2687  if (!ED->getTypeForDecl()->isIncompleteType()) {
2688  Size = CGM.getContext().getTypeSize(ED->getTypeForDecl());
2689  Align = getDeclAlignIfRequired(ED, CGM.getContext());
2690  }
2691 
2692  SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
2693 
2694  // Create elements for each enumerator.
2696  ED = ED->getDefinition();
2697  bool IsSigned = ED->getIntegerType()->isSignedIntegerType();
2698  for (const auto *Enum : ED->enumerators()) {
2699  const auto &InitVal = Enum->getInitVal();
2700  auto Value = IsSigned ? InitVal.getSExtValue() : InitVal.getZExtValue();
2701  Enumerators.push_back(
2702  DBuilder.createEnumerator(Enum->getName(), Value, !IsSigned));
2703  }
2704 
2705  // Return a CompositeType for the enum itself.
2706  llvm::DINodeArray EltArray = DBuilder.getOrCreateArray(Enumerators);
2707 
2708  llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
2709  unsigned Line = getLineNumber(ED->getLocation());
2710  llvm::DIScope *EnumContext = getDeclContextDescriptor(ED);
2711  llvm::DIType *ClassTy = getOrCreateType(ED->getIntegerType(), DefUnit);
2712  return DBuilder.createEnumerationType(EnumContext, ED->getName(), DefUnit,
2713  Line, Size, Align, EltArray, ClassTy,
2714  Identifier, ED->isFixed());
2715 }
2716 
2717 llvm::DIMacro *CGDebugInfo::CreateMacro(llvm::DIMacroFile *Parent,
2718  unsigned MType, SourceLocation LineLoc,
2719  StringRef Name, StringRef Value) {
2720  unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc);
2721  return DBuilder.createMacro(Parent, Line, MType, Name, Value);
2722 }
2723 
2724 llvm::DIMacroFile *CGDebugInfo::CreateTempMacroFile(llvm::DIMacroFile *Parent,
2725  SourceLocation LineLoc,
2726  SourceLocation FileLoc) {
2727  llvm::DIFile *FName = getOrCreateFile(FileLoc);
2728  unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc);
2729  return DBuilder.createTempMacroFile(Parent, Line, FName);
2730 }
2731 
2733  Qualifiers Quals;
2734  do {
2735  Qualifiers InnerQuals = T.getLocalQualifiers();
2736  // Qualifiers::operator+() doesn't like it if you add a Qualifier
2737  // that is already there.
2738  Quals += Qualifiers::removeCommonQualifiers(Quals, InnerQuals);
2739  Quals += InnerQuals;
2740  QualType LastT = T;
2741  switch (T->getTypeClass()) {
2742  default:
2743  return C.getQualifiedType(T.getTypePtr(), Quals);
2744  case Type::TemplateSpecialization: {
2745  const auto *Spec = cast<TemplateSpecializationType>(T);
2746  if (Spec->isTypeAlias())
2747  return C.getQualifiedType(T.getTypePtr(), Quals);
2748  T = Spec->desugar();
2749  break;
2750  }
2751  case Type::TypeOfExpr:
2752  T = cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType();
2753  break;
2754  case Type::TypeOf:
2755  T = cast<TypeOfType>(T)->getUnderlyingType();
2756  break;
2757  case Type::Decltype:
2758  T = cast<DecltypeType>(T)->getUnderlyingType();
2759  break;
2760  case Type::UnaryTransform:
2761  T = cast<UnaryTransformType>(T)->getUnderlyingType();
2762  break;
2763  case Type::Attributed:
2764  T = cast<AttributedType>(T)->getEquivalentType();
2765  break;
2766  case Type::Elaborated:
2767  T = cast<ElaboratedType>(T)->getNamedType();
2768  break;
2769  case Type::Paren:
2770  T = cast<ParenType>(T)->getInnerType();
2771  break;
2772  case Type::SubstTemplateTypeParm:
2773  T = cast<SubstTemplateTypeParmType>(T)->getReplacementType();
2774  break;
2775  case Type::Auto:
2776  case Type::DeducedTemplateSpecialization: {
2777  QualType DT = cast<DeducedType>(T)->getDeducedType();
2778  assert(!DT.isNull() && "Undeduced types shouldn't reach here.");
2779  T = DT;
2780  break;
2781  }
2782  case Type::Adjusted:
2783  case Type::Decayed:
2784  // Decayed and adjusted types use the adjusted type in LLVM and DWARF.
2785  T = cast<AdjustedType>(T)->getAdjustedType();
2786  break;
2787  }
2788 
2789  assert(T != LastT && "Type unwrapping failed to unwrap!");
2790  (void)LastT;
2791  } while (true);
2792 }
2793 
2794 llvm::DIType *CGDebugInfo::getTypeOrNull(QualType Ty) {
2795 
2796  // Unwrap the type as needed for debug information.
2797  Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext());
2798 
2799  auto It = TypeCache.find(Ty.getAsOpaquePtr());
2800  if (It != TypeCache.end()) {
2801  // Verify that the debug info still exists.
2802  if (llvm::Metadata *V = It->second)
2803  return cast<llvm::DIType>(V);
2804  }
2805 
2806  return nullptr;
2807 }
2808 
2810  const ClassTemplateSpecializationDecl &SD) {
2811  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2812  return;
2813  completeUnusedClass(SD);
2814 }
2815 
2817  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2818  return;
2819 
2820  completeClassData(&D);
2821  // In case this type has no member function definitions being emitted, ensure
2822  // it is retained
2823  RetainedTypes.push_back(CGM.getContext().getRecordType(&D).getAsOpaquePtr());
2824 }
2825 
2826 llvm::DIType *CGDebugInfo::getOrCreateType(QualType Ty, llvm::DIFile *Unit) {
2827  if (Ty.isNull())
2828  return nullptr;
2829 
2830  // Unwrap the type as needed for debug information.
2831  Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext());
2832 
2833  if (auto *T = getTypeOrNull(Ty))
2834  return T;
2835 
2836  llvm::DIType *Res = CreateTypeNode(Ty, Unit);
2837  void *TyPtr = Ty.getAsOpaquePtr();
2838 
2839  // And update the type cache.
2840  TypeCache[TyPtr].reset(Res);
2841 
2842  return Res;
2843 }
2844 
2845 llvm::DIModule *CGDebugInfo::getParentModuleOrNull(const Decl *D) {
2846  // A forward declaration inside a module header does not belong to the module.
2847  if (isa<RecordDecl>(D) && !cast<RecordDecl>(D)->getDefinition())
2848  return nullptr;
2849  if (DebugTypeExtRefs && D->isFromASTFile()) {
2850  // Record a reference to an imported clang module or precompiled header.
2851  auto *Reader = CGM.getContext().getExternalSource();
2852  auto Idx = D->getOwningModuleID();
2853  auto Info = Reader->getSourceDescriptor(Idx);
2854  if (Info)
2855  return getOrCreateModuleRef(*Info, /*SkeletonCU=*/true);
2856  } else if (ClangModuleMap) {
2857  // We are building a clang module or a precompiled header.
2858  //
2859  // TODO: When D is a CXXRecordDecl or a C++ Enum, the ODR applies
2860  // and it wouldn't be necessary to specify the parent scope
2861  // because the type is already unique by definition (it would look
2862  // like the output of -fno-standalone-debug). On the other hand,
2863  // the parent scope helps a consumer to quickly locate the object
2864  // file where the type's definition is located, so it might be
2865  // best to make this behavior a command line or debugger tuning
2866  // option.
2867  if (Module *M = D->getOwningModule()) {
2868  // This is a (sub-)module.
2870  return getOrCreateModuleRef(Info, /*SkeletonCU=*/false);
2871  } else {
2872  // This the precompiled header being built.
2873  return getOrCreateModuleRef(PCHDescriptor, /*SkeletonCU=*/false);
2874  }
2875  }
2876 
2877  return nullptr;
2878 }
2879 
2880 llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit) {
2881  // Handle qualifiers, which recursively handles what they refer to.
2882  if (Ty.hasLocalQualifiers())
2883  return CreateQualifiedType(Ty, Unit);
2884 
2885  // Work out details of type.
2886  switch (Ty->getTypeClass()) {
2887 #define TYPE(Class, Base)
2888 #define ABSTRACT_TYPE(Class, Base)
2889 #define NON_CANONICAL_TYPE(Class, Base)
2890 #define DEPENDENT_TYPE(Class, Base) case Type::Class:
2891 #include "clang/AST/TypeNodes.def"
2892  llvm_unreachable("Dependent types cannot show up in debug information");
2893 
2894  case Type::ExtVector:
2895  case Type::Vector:
2896  return CreateType(cast<VectorType>(Ty), Unit);
2897  case Type::ObjCObjectPointer:
2898  return CreateType(cast<ObjCObjectPointerType>(Ty), Unit);
2899  case Type::ObjCObject:
2900  return CreateType(cast<ObjCObjectType>(Ty), Unit);
2901  case Type::ObjCTypeParam:
2902  return CreateType(cast<ObjCTypeParamType>(Ty), Unit);
2903  case Type::ObjCInterface:
2904  return CreateType(cast<ObjCInterfaceType>(Ty), Unit);
2905  case Type::Builtin:
2906  return CreateType(cast<BuiltinType>(Ty));
2907  case Type::Complex:
2908  return CreateType(cast<ComplexType>(Ty));
2909  case Type::Pointer:
2910  return CreateType(cast<PointerType>(Ty), Unit);
2911  case Type::BlockPointer:
2912  return CreateType(cast<BlockPointerType>(Ty), Unit);
2913  case Type::Typedef:
2914  return CreateType(cast<TypedefType>(Ty), Unit);
2915  case Type::Record:
2916  return CreateType(cast<RecordType>(Ty));
2917  case Type::Enum:
2918  return CreateEnumType(cast<EnumType>(Ty));
2919  case Type::FunctionProto:
2920  case Type::FunctionNoProto:
2921  return CreateType(cast<FunctionType>(Ty), Unit);
2922  case Type::ConstantArray:
2923  case Type::VariableArray:
2924  case Type::IncompleteArray:
2925  return CreateType(cast<ArrayType>(Ty), Unit);
2926 
2927  case Type::LValueReference:
2928  return CreateType(cast<LValueReferenceType>(Ty), Unit);
2929  case Type::RValueReference:
2930  return CreateType(cast<RValueReferenceType>(Ty), Unit);
2931 
2932  case Type::MemberPointer:
2933  return CreateType(cast<MemberPointerType>(Ty), Unit);
2934 
2935  case Type::Atomic:
2936  return CreateType(cast<AtomicType>(Ty), Unit);
2937 
2938  case Type::Pipe:
2939  return CreateType(cast<PipeType>(Ty), Unit);
2940 
2941  case Type::TemplateSpecialization:
2942  return CreateType(cast<TemplateSpecializationType>(Ty), Unit);
2943 
2944  case Type::Auto:
2945  case Type::Attributed:
2946  case Type::Adjusted:
2947  case Type::Decayed:
2948  case Type::DeducedTemplateSpecialization:
2949  case Type::Elaborated:
2950  case Type::Paren:
2951  case Type::SubstTemplateTypeParm:
2952  case Type::TypeOfExpr:
2953  case Type::TypeOf:
2954  case Type::Decltype:
2955  case Type::UnaryTransform:
2956  case Type::PackExpansion:
2957  break;
2958  }
2959 
2960  llvm_unreachable("type should have been unwrapped!");
2961 }
2962 
2963 llvm::DICompositeType *CGDebugInfo::getOrCreateLimitedType(const RecordType *Ty,
2964  llvm::DIFile *Unit) {
2965  QualType QTy(Ty, 0);
2966 
2967  auto *T = cast_or_null<llvm::DICompositeType>(getTypeOrNull(QTy));
2968 
2969  // We may have cached a forward decl when we could have created
2970  // a non-forward decl. Go ahead and create a non-forward decl
2971  // now.
2972  if (T && !T->isForwardDecl())
2973  return T;
2974 
2975  // Otherwise create the type.
2976  llvm::DICompositeType *Res = CreateLimitedType(Ty);
2977 
2978  // Propagate members from the declaration to the definition
2979  // CreateType(const RecordType*) will overwrite this with the members in the
2980  // correct order if the full type is needed.
2981  DBuilder.replaceArrays(Res, T ? T->getElements() : llvm::DINodeArray());
2982 
2983  // And update the type cache.
2984  TypeCache[QTy.getAsOpaquePtr()].reset(Res);
2985  return Res;
2986 }
2987 
2988 // TODO: Currently used for context chains when limiting debug info.
2989 llvm::DICompositeType *CGDebugInfo::CreateLimitedType(const RecordType *Ty) {
2990  RecordDecl *RD = Ty->getDecl();
2991 
2992  // Get overall information about the record type for the debug info.
2993  llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
2994  unsigned Line = getLineNumber(RD->getLocation());
2995  StringRef RDName = getClassName(RD);
2996 
2997  llvm::DIScope *RDContext = getDeclContextDescriptor(RD);
2998 
2999  // If we ended up creating the type during the context chain construction,
3000  // just return that.
3001  auto *T = cast_or_null<llvm::DICompositeType>(
3002  getTypeOrNull(CGM.getContext().getRecordType(RD)));
3003  if (T && (!T->isForwardDecl() || !RD->getDefinition()))
3004  return T;
3005 
3006  // If this is just a forward or incomplete declaration, construct an
3007  // appropriately marked node and just return it.
3008  const RecordDecl *D = RD->getDefinition();
3009  if (!D || !D->isCompleteDefinition())
3010  return getOrCreateRecordFwdDecl(Ty, RDContext);
3011 
3012  uint64_t Size = CGM.getContext().getTypeSize(Ty);
3013  auto Align = getDeclAlignIfRequired(D, CGM.getContext());
3014 
3015  SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
3016 
3017  // Explicitly record the calling convention for C++ records.
3018  auto Flags = llvm::DINode::FlagZero;
3019  if (auto CXXRD = dyn_cast<CXXRecordDecl>(RD)) {
3020  if (CGM.getCXXABI().getRecordArgABI(CXXRD) == CGCXXABI::RAA_Indirect)
3021  Flags |= llvm::DINode::FlagTypePassByReference;
3022  else
3023  Flags |= llvm::DINode::FlagTypePassByValue;
3024 
3025  // Record if a C++ record is trivial type.
3026  if (CXXRD->isTrivial())
3027  Flags |= llvm::DINode::FlagTrivial;
3028  }
3029 
3030  llvm::DICompositeType *RealDecl = DBuilder.createReplaceableCompositeType(
3031  getTagForRecord(RD), RDName, RDContext, DefUnit, Line, 0, Size, Align,
3032  Flags, Identifier);
3033 
3034  // Elements of composite types usually have back to the type, creating
3035  // uniquing cycles. Distinct nodes are more efficient.
3036  switch (RealDecl->getTag()) {
3037  default:
3038  llvm_unreachable("invalid composite type tag");
3039 
3040  case llvm::dwarf::DW_TAG_array_type:
3041  case llvm::dwarf::DW_TAG_enumeration_type:
3042  // Array elements and most enumeration elements don't have back references,
3043  // so they don't tend to be involved in uniquing cycles and there is some
3044  // chance of merging them when linking together two modules. Only make
3045  // them distinct if they are ODR-uniqued.
3046  if (Identifier.empty())
3047  break;
3048  LLVM_FALLTHROUGH;
3049 
3050  case llvm::dwarf::DW_TAG_structure_type:
3051  case llvm::dwarf::DW_TAG_union_type:
3052  case llvm::dwarf::DW_TAG_class_type:
3053  // Immediately resolve to a distinct node.
3054  RealDecl =
3055  llvm::MDNode::replaceWithDistinct(llvm::TempDICompositeType(RealDecl));
3056  break;
3057  }
3058 
3059  RegionMap[Ty->getDecl()].reset(RealDecl);
3060  TypeCache[QualType(Ty, 0).getAsOpaquePtr()].reset(RealDecl);
3061 
3062  if (const auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD))
3063  DBuilder.replaceArrays(RealDecl, llvm::DINodeArray(),
3064  CollectCXXTemplateParams(TSpecial, DefUnit));
3065  return RealDecl;
3066 }
3067 
3068 void CGDebugInfo::CollectContainingType(const CXXRecordDecl *RD,
3069  llvm::DICompositeType *RealDecl) {
3070  // A class's primary base or the class itself contains the vtable.
3071  llvm::DICompositeType *ContainingType = nullptr;
3072  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
3073  if (const CXXRecordDecl *PBase = RL.getPrimaryBase()) {
3074  // Seek non-virtual primary base root.
3075  while (1) {
3076  const ASTRecordLayout &BRL = CGM.getContext().getASTRecordLayout(PBase);
3077  const CXXRecordDecl *PBT = BRL.getPrimaryBase();
3078  if (PBT && !BRL.isPrimaryBaseVirtual())
3079  PBase = PBT;
3080  else
3081  break;
3082  }
3083  ContainingType = cast<llvm::DICompositeType>(
3084  getOrCreateType(QualType(PBase->getTypeForDecl(), 0),
3085  getOrCreateFile(RD->getLocation())));
3086  } else if (RD->isDynamicClass())
3087  ContainingType = RealDecl;
3088 
3089  DBuilder.replaceVTableHolder(RealDecl, ContainingType);
3090 }
3091 
3092 llvm::DIType *CGDebugInfo::CreateMemberType(llvm::DIFile *Unit, QualType FType,
3093  StringRef Name, uint64_t *Offset) {
3094  llvm::DIType *FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
3095  uint64_t FieldSize = CGM.getContext().getTypeSize(FType);
3096  auto FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext());
3097  llvm::DIType *Ty =
3098  DBuilder.createMemberType(Unit, Name, Unit, 0, FieldSize, FieldAlign,
3099  *Offset, llvm::DINode::FlagZero, FieldTy);
3100  *Offset += FieldSize;
3101  return Ty;
3102 }
3103 
3104 void CGDebugInfo::collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit,
3105  StringRef &Name,
3106  StringRef &LinkageName,
3107  llvm::DIScope *&FDContext,
3108  llvm::DINodeArray &TParamsArray,
3109  llvm::DINode::DIFlags &Flags) {
3110  const auto *FD = cast<FunctionDecl>(GD.getDecl());
3111  Name = getFunctionName(FD);
3112  // Use mangled name as linkage name for C/C++ functions.
3113  if (FD->hasPrototype()) {
3114  LinkageName = CGM.getMangledName(GD);
3115  Flags |= llvm::DINode::FlagPrototyped;
3116  }
3117  // No need to replicate the linkage name if it isn't different from the
3118  // subprogram name, no need to have it at all unless coverage is enabled or
3119  // debug is set to more than just line tables or extra debug info is needed.
3120  if (LinkageName == Name || (!CGM.getCodeGenOpts().EmitGcovArcs &&
3121  !CGM.getCodeGenOpts().EmitGcovNotes &&
3122  !CGM.getCodeGenOpts().DebugInfoForProfiling &&
3124  LinkageName = StringRef();
3125 
3126  if (DebugKind >= codegenoptions::LimitedDebugInfo) {
3127  if (const NamespaceDecl *NSDecl =
3128  dyn_cast_or_null<NamespaceDecl>(FD->getDeclContext()))
3129  FDContext = getOrCreateNamespace(NSDecl);
3130  else if (const RecordDecl *RDecl =
3131  dyn_cast_or_null<RecordDecl>(FD->getDeclContext())) {
3132  llvm::DIScope *Mod = getParentModuleOrNull(RDecl);
3133  FDContext = getContextDescriptor(RDecl, Mod ? Mod : TheCU);
3134  }
3135  // Check if it is a noreturn-marked function
3136  if (FD->isNoReturn())
3137  Flags |= llvm::DINode::FlagNoReturn;
3138  // Collect template parameters.
3139  TParamsArray = CollectFunctionTemplateParams(FD, Unit);
3140  }
3141 }
3142 
3143 void CGDebugInfo::collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit,
3144  unsigned &LineNo, QualType &T,
3145  StringRef &Name, StringRef &LinkageName,
3146  llvm::MDTuple *&TemplateParameters,
3147  llvm::DIScope *&VDContext) {
3148  Unit = getOrCreateFile(VD->getLocation());
3149  LineNo = getLineNumber(VD->getLocation());
3150 
3151  setLocation(VD->getLocation());
3152 
3153  T = VD->getType();
3154  if (T->isIncompleteArrayType()) {
3155  // CodeGen turns int[] into int[1] so we'll do the same here.
3156  llvm::APInt ConstVal(32, 1);
3157  QualType ET = CGM.getContext().getAsArrayType(T)->getElementType();
3158 
3159  T = CGM.getContext().getConstantArrayType(ET, ConstVal, ArrayType::Normal,
3160  0);
3161  }
3162 
3163  Name = VD->getName();
3164  if (VD->getDeclContext() && !isa<FunctionDecl>(VD->getDeclContext()) &&
3165  !isa<ObjCMethodDecl>(VD->getDeclContext()))
3166  LinkageName = CGM.getMangledName(VD);
3167  if (LinkageName == Name)
3168  LinkageName = StringRef();
3169 
3170  if (isa<VarTemplateSpecializationDecl>(VD)) {
3171  llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VD, &*Unit);
3172  TemplateParameters = parameterNodes.get();
3173  } else {
3174  TemplateParameters = nullptr;
3175  }
3176 
3177  // Since we emit declarations (DW_AT_members) for static members, place the
3178  // definition of those static members in the namespace they were declared in
3179  // in the source code (the lexical decl context).
3180  // FIXME: Generalize this for even non-member global variables where the
3181  // declaration and definition may have different lexical decl contexts, once
3182  // we have support for emitting declarations of (non-member) global variables.
3183  const DeclContext *DC = VD->isStaticDataMember() ? VD->getLexicalDeclContext()
3184  : VD->getDeclContext();
3185  // When a record type contains an in-line initialization of a static data
3186  // member, and the record type is marked as __declspec(dllexport), an implicit
3187  // definition of the member will be created in the record context. DWARF
3188  // doesn't seem to have a nice way to describe this in a form that consumers
3189  // are likely to understand, so fake the "normal" situation of a definition
3190  // outside the class by putting it in the global scope.
3191  if (DC->isRecord())
3192  DC = CGM.getContext().getTranslationUnitDecl();
3193 
3194  llvm::DIScope *Mod = getParentModuleOrNull(VD);
3195  VDContext = getContextDescriptor(cast<Decl>(DC), Mod ? Mod : TheCU);
3196 }
3197 
3198 llvm::DISubprogram *CGDebugInfo::getFunctionFwdDeclOrStub(GlobalDecl GD,
3199  bool Stub) {
3200  llvm::DINodeArray TParamsArray;
3201  StringRef Name, LinkageName;
3202  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3203  llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
3204  SourceLocation Loc = GD.getDecl()->getLocation();
3205  llvm::DIFile *Unit = getOrCreateFile(Loc);
3206  llvm::DIScope *DContext = Unit;
3207  unsigned Line = getLineNumber(Loc);
3208  collectFunctionDeclProps(GD, Unit, Name, LinkageName, DContext, TParamsArray,
3209  Flags);
3210  auto *FD = dyn_cast<FunctionDecl>(GD.getDecl());
3211 
3212  // Build function type.
3213  SmallVector<QualType, 16> ArgTypes;
3214  if (FD)
3215  for (const ParmVarDecl *Parm : FD->parameters())
3216  ArgTypes.push_back(Parm->getType());
3217  CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv();
3218  QualType FnType = CGM.getContext().getFunctionType(
3219  FD->getReturnType(), ArgTypes, FunctionProtoType::ExtProtoInfo(CC));
3220  if (!FD->isExternallyVisible())
3221  SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit;
3222  if (CGM.getLangOpts().Optimize)
3223  SPFlags |= llvm::DISubprogram::SPFlagOptimized;
3224 
3225  if (Stub) {
3226  Flags |= getCallSiteRelatedAttrs();
3227  SPFlags |= llvm::DISubprogram::SPFlagDefinition;
3228  return DBuilder.createFunction(
3229  DContext, Name, LinkageName, Unit, Line,
3230  getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags,
3231  TParamsArray.get(), getFunctionDeclaration(FD));
3232  }
3233 
3234  llvm::DISubprogram *SP = DBuilder.createTempFunctionFwdDecl(
3235  DContext, Name, LinkageName, Unit, Line,
3236  getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags,
3237  TParamsArray.get(), getFunctionDeclaration(FD));
3238  const FunctionDecl *CanonDecl = FD->getCanonicalDecl();
3239  FwdDeclReplaceMap.emplace_back(std::piecewise_construct,
3240  std::make_tuple(CanonDecl),
3241  std::make_tuple(SP));
3242  return SP;
3243 }
3244 
3245 llvm::DISubprogram *CGDebugInfo::getFunctionForwardDeclaration(GlobalDecl GD) {
3246  return getFunctionFwdDeclOrStub(GD, /* Stub = */ false);
3247 }
3248 
3249 llvm::DISubprogram *CGDebugInfo::getFunctionStub(GlobalDecl GD) {
3250  return getFunctionFwdDeclOrStub(GD, /* Stub = */ true);
3251 }
3252 
3253 llvm::DIGlobalVariable *
3254 CGDebugInfo::getGlobalVariableForwardDeclaration(const VarDecl *VD) {
3255  QualType T;
3256  StringRef Name, LinkageName;
3257  SourceLocation Loc = VD->getLocation();
3258  llvm::DIFile *Unit = getOrCreateFile(Loc);
3259  llvm::DIScope *DContext = Unit;
3260  unsigned Line = getLineNumber(Loc);
3261  llvm::MDTuple *TemplateParameters = nullptr;
3262 
3263  collectVarDeclProps(VD, Unit, Line, T, Name, LinkageName, TemplateParameters,
3264  DContext);
3265  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3266  auto *GV = DBuilder.createTempGlobalVariableFwdDecl(
3267  DContext, Name, LinkageName, Unit, Line, getOrCreateType(T, Unit),
3268  !VD->isExternallyVisible(), nullptr, TemplateParameters, Align);
3269  FwdDeclReplaceMap.emplace_back(
3270  std::piecewise_construct,
3271  std::make_tuple(cast<VarDecl>(VD->getCanonicalDecl())),
3272  std::make_tuple(static_cast<llvm::Metadata *>(GV)));
3273  return GV;
3274 }
3275 
3276 llvm::DINode *CGDebugInfo::getDeclarationOrDefinition(const Decl *D) {
3277  // We only need a declaration (not a definition) of the type - so use whatever
3278  // we would otherwise do to get a type for a pointee. (forward declarations in
3279  // limited debug info, full definitions (if the type definition is available)
3280  // in unlimited debug info)
3281  if (const auto *TD = dyn_cast<TypeDecl>(D))
3282  return getOrCreateType(CGM.getContext().getTypeDeclType(TD),
3283  getOrCreateFile(TD->getLocation()));
3284  auto I = DeclCache.find(D->getCanonicalDecl());
3285 
3286  if (I != DeclCache.end()) {
3287  auto N = I->second;
3288  if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(N))
3289  return GVE->getVariable();
3290  return dyn_cast_or_null<llvm::DINode>(N);
3291  }
3292 
3293  // No definition for now. Emit a forward definition that might be
3294  // merged with a potential upcoming definition.
3295  if (const auto *FD = dyn_cast<FunctionDecl>(D))
3296  return getFunctionForwardDeclaration(FD);
3297  else if (const auto *VD = dyn_cast<VarDecl>(D))
3298  return getGlobalVariableForwardDeclaration(VD);
3299 
3300  return nullptr;
3301 }
3302 
3303 llvm::DISubprogram *CGDebugInfo::getFunctionDeclaration(const Decl *D) {
3304  if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly)
3305  return nullptr;
3306 
3307  const auto *FD = dyn_cast<FunctionDecl>(D);
3308  if (!FD)
3309  return nullptr;
3310 
3311  // Setup context.
3312  auto *S = getDeclContextDescriptor(D);
3313 
3314  auto MI = SPCache.find(FD->getCanonicalDecl());
3315  if (MI == SPCache.end()) {
3316  if (const auto *MD = dyn_cast<CXXMethodDecl>(FD->getCanonicalDecl())) {
3317  return CreateCXXMemberFunction(MD, getOrCreateFile(MD->getLocation()),
3318  cast<llvm::DICompositeType>(S));
3319  }
3320  }
3321  if (MI != SPCache.end()) {
3322  auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second);
3323  if (SP && !SP->isDefinition())
3324  return SP;
3325  }
3326 
3327  for (auto NextFD : FD->redecls()) {
3328  auto MI = SPCache.find(NextFD->getCanonicalDecl());
3329  if (MI != SPCache.end()) {
3330  auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second);
3331  if (SP && !SP->isDefinition())
3332  return SP;
3333  }
3334  }
3335  return nullptr;
3336 }
3337 
3338 // getOrCreateFunctionType - Construct type. If it is a c++ method, include
3339 // implicit parameter "this".
3340 llvm::DISubroutineType *CGDebugInfo::getOrCreateFunctionType(const Decl *D,
3341  QualType FnType,
3342  llvm::DIFile *F) {
3343  if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly)
3344  // Create fake but valid subroutine type. Otherwise -verify would fail, and
3345  // subprogram DIE will miss DW_AT_decl_file and DW_AT_decl_line fields.
3346  return DBuilder.createSubroutineType(DBuilder.getOrCreateTypeArray(None));
3347 
3348  if (const auto *Method = dyn_cast<CXXMethodDecl>(D))
3349  return getOrCreateMethodType(Method, F);
3350 
3351  const auto *FTy = FnType->getAs<FunctionType>();
3352  CallingConv CC = FTy ? FTy->getCallConv() : CallingConv::CC_C;
3353 
3354  if (const auto *OMethod = dyn_cast<ObjCMethodDecl>(D)) {
3355  // Add "self" and "_cmd"
3357 
3358  // First element is always return type. For 'void' functions it is NULL.
3359  QualType ResultTy = OMethod->getReturnType();
3360 
3361  // Replace the instancetype keyword with the actual type.
3362  if (ResultTy == CGM.getContext().getObjCInstanceType())
3363  ResultTy = CGM.getContext().getPointerType(
3364  QualType(OMethod->getClassInterface()->getTypeForDecl(), 0));
3365 
3366  Elts.push_back(getOrCreateType(ResultTy, F));
3367  // "self" pointer is always first argument.
3368  QualType SelfDeclTy;
3369  if (auto *SelfDecl = OMethod->getSelfDecl())
3370  SelfDeclTy = SelfDecl->getType();
3371  else if (auto *FPT = dyn_cast<FunctionProtoType>(FnType))
3372  if (FPT->getNumParams() > 1)
3373  SelfDeclTy = FPT->getParamType(0);
3374  if (!SelfDeclTy.isNull())
3375  Elts.push_back(
3376  CreateSelfType(SelfDeclTy, getOrCreateType(SelfDeclTy, F)));
3377  // "_cmd" pointer is always second argument.
3378  Elts.push_back(DBuilder.createArtificialType(
3379  getOrCreateType(CGM.getContext().getObjCSelType(), F)));
3380  // Get rest of the arguments.
3381  for (const auto *PI : OMethod->parameters())
3382  Elts.push_back(getOrCreateType(PI->getType(), F));
3383  // Variadic methods need a special marker at the end of the type list.
3384  if (OMethod->isVariadic())
3385  Elts.push_back(DBuilder.createUnspecifiedParameter());
3386 
3387  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts);
3388  return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
3389  getDwarfCC(CC));
3390  }
3391 
3392  // Handle variadic function types; they need an additional
3393  // unspecified parameter.
3394  if (const auto *FD = dyn_cast<FunctionDecl>(D))
3395  if (FD->isVariadic()) {
3397  EltTys.push_back(getOrCreateType(FD->getReturnType(), F));
3398  if (const auto *FPT = dyn_cast<FunctionProtoType>(FnType))
3399  for (QualType ParamType : FPT->param_types())
3400  EltTys.push_back(getOrCreateType(ParamType, F));
3401  EltTys.push_back(DBuilder.createUnspecifiedParameter());
3402  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys);
3403  return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
3404  getDwarfCC(CC));
3405  }
3406 
3407  return cast<llvm::DISubroutineType>(getOrCreateType(FnType, F));
3408 }
3409 
3411  SourceLocation ScopeLoc, QualType FnType,
3412  llvm::Function *Fn, bool CurFuncIsThunk,
3413  CGBuilderTy &Builder) {
3414 
3415  StringRef Name;
3416  StringRef LinkageName;
3417 
3418  FnBeginRegionCount.push_back(LexicalBlockStack.size());
3419 
3420  const Decl *D = GD.getDecl();
3421  bool HasDecl = (D != nullptr);
3422 
3423  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3424  llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
3425  llvm::DIFile *Unit = getOrCreateFile(Loc);
3426  llvm::DIScope *FDContext = Unit;
3427  llvm::DINodeArray TParamsArray;
3428  if (!HasDecl) {
3429  // Use llvm function name.
3430  LinkageName = Fn->getName();
3431  } else if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
3432  // If there is a subprogram for this function available then use it.
3433  auto FI = SPCache.find(FD->getCanonicalDecl());
3434  if (FI != SPCache.end()) {
3435  auto *SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second);
3436  if (SP && SP->isDefinition()) {
3437  LexicalBlockStack.emplace_back(SP);
3438  RegionMap[D].reset(SP);
3439  return;
3440  }
3441  }
3442  collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext,
3443  TParamsArray, Flags);
3444  } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) {
3445  Name = getObjCMethodName(OMD);
3446  Flags |= llvm::DINode::FlagPrototyped;
3447  } else {
3448  // Use llvm function name.
3449  Name = Fn->getName();
3450  Flags |= llvm::DINode::FlagPrototyped;
3451  }
3452  if (Name.startswith("\01"))
3453  Name = Name.substr(1);
3454 
3455  if (!HasDecl || D->isImplicit() || D->hasAttr<ArtificialAttr>()) {
3456  Flags |= llvm::DINode::FlagArtificial;
3457  // Artificial functions should not silently reuse CurLoc.
3458  CurLoc = SourceLocation();
3459  }
3460 
3461  if (CurFuncIsThunk)
3462  Flags |= llvm::DINode::FlagThunk;
3463 
3464  if (Fn->hasLocalLinkage())
3465  SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit;
3466  if (CGM.getLangOpts().Optimize)
3467  SPFlags |= llvm::DISubprogram::SPFlagOptimized;
3468 
3469  llvm::DINode::DIFlags FlagsForDef = Flags | getCallSiteRelatedAttrs();
3470  llvm::DISubprogram::DISPFlags SPFlagsForDef =
3471  SPFlags | llvm::DISubprogram::SPFlagDefinition;
3472 
3473  unsigned LineNo = getLineNumber(Loc);
3474  unsigned ScopeLine = getLineNumber(ScopeLoc);
3475 
3476  // FIXME: The function declaration we're constructing here is mostly reusing
3477  // declarations from CXXMethodDecl and not constructing new ones for arbitrary
3478  // FunctionDecls. When/if we fix this we can have FDContext be TheCU/null for
3479  // all subprograms instead of the actual context since subprogram definitions
3480  // are emitted as CU level entities by the backend.
3481  llvm::DISubprogram *SP = DBuilder.createFunction(
3482  FDContext, Name, LinkageName, Unit, LineNo,
3483  getOrCreateFunctionType(D, FnType, Unit), ScopeLine, FlagsForDef,
3484  SPFlagsForDef, TParamsArray.get(), getFunctionDeclaration(D));
3485  Fn->setSubprogram(SP);
3486  // We might get here with a VarDecl in the case we're generating
3487  // code for the initialization of globals. Do not record these decls
3488  // as they will overwrite the actual VarDecl Decl in the cache.
3489  if (HasDecl && isa<FunctionDecl>(D))
3490  DeclCache[D->getCanonicalDecl()].reset(SP);
3491 
3492  if (CGM.getCodeGenOpts().DwarfVersion >= 5) {
3493  // Starting with DWARF V5 method declarations are emitted as children of
3494  // the interface type.
3495  if (const auto *OMD = dyn_cast_or_null<ObjCMethodDecl>(D)) {
3496  const ObjCInterfaceDecl *ID = OMD->getClassInterface();
3497  QualType QTy(ID->getTypeForDecl(), 0);
3498  auto It = TypeCache.find(QTy.getAsOpaquePtr());
3499  if (It != TypeCache.end()) {
3500  llvm::DICompositeType *InterfaceDecl =
3501  cast<llvm::DICompositeType>(It->second);
3502  llvm::DISubprogram *FD = DBuilder.createFunction(
3503  InterfaceDecl, Name, LinkageName, Unit, LineNo,
3504  getOrCreateFunctionType(D, FnType, Unit), ScopeLine, Flags, SPFlags,
3505  TParamsArray.get());
3506  DBuilder.finalizeSubprogram(FD);
3507  ObjCMethodCache[ID].push_back(FD);
3508  }
3509  }
3510  }
3511 
3512  // Push the function onto the lexical block stack.
3513  LexicalBlockStack.emplace_back(SP);
3514 
3515  if (HasDecl)
3516  RegionMap[D].reset(SP);
3517 }
3518 
3520  QualType FnType) {
3521  StringRef Name;
3522  StringRef LinkageName;
3523 
3524  const Decl *D = GD.getDecl();
3525  if (!D)
3526  return;
3527 
3528  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3529  llvm::DIFile *Unit = getOrCreateFile(Loc);
3530  llvm::DIScope *FDContext = getDeclContextDescriptor(D);
3531  llvm::DINodeArray TParamsArray;
3532  if (isa<FunctionDecl>(D)) {
3533  // If there is a DISubprogram for this function available then use it.
3534  collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext,
3535  TParamsArray, Flags);
3536  } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) {
3537  Name = getObjCMethodName(OMD);
3538  Flags |= llvm::DINode::FlagPrototyped;
3539  } else {
3540  llvm_unreachable("not a function or ObjC method");
3541  }
3542  if (!Name.empty() && Name[0] == '\01')
3543  Name = Name.substr(1);
3544 
3545  if (D->isImplicit()) {
3546  Flags |= llvm::DINode::FlagArtificial;
3547  // Artificial functions without a location should not silently reuse CurLoc.
3548  if (Loc.isInvalid())
3549  CurLoc = SourceLocation();
3550  }
3551  unsigned LineNo = getLineNumber(Loc);
3552  unsigned ScopeLine = 0;
3553  llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
3554  if (CGM.getLangOpts().Optimize)
3555  SPFlags |= llvm::DISubprogram::SPFlagOptimized;
3556 
3557  DBuilder.retainType(DBuilder.createFunction(
3558  FDContext, Name, LinkageName, Unit, LineNo,
3559  getOrCreateFunctionType(D, FnType, Unit), ScopeLine, Flags, SPFlags,
3560  TParamsArray.get(), getFunctionDeclaration(D)));
3561 }
3562 
3564  const auto *FD = cast<FunctionDecl>(GD.getDecl());
3565  // If there is a subprogram for this function available then use it.
3566  auto FI = SPCache.find(FD->getCanonicalDecl());
3567  llvm::DISubprogram *SP = nullptr;
3568  if (FI != SPCache.end())
3569  SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second);
3570  if (!SP || !SP->isDefinition())
3571  SP = getFunctionStub(GD);
3572  FnBeginRegionCount.push_back(LexicalBlockStack.size());
3573  LexicalBlockStack.emplace_back(SP);
3574  setInlinedAt(Builder.getCurrentDebugLocation());
3575  EmitLocation(Builder, FD->getLocation());
3576 }
3577 
3579  assert(CurInlinedAt && "unbalanced inline scope stack");
3580  EmitFunctionEnd(Builder, nullptr);
3581  setInlinedAt(llvm::DebugLoc(CurInlinedAt).getInlinedAt());
3582 }
3583 
3585  // Update our current location
3586  setLocation(Loc);
3587 
3588  if (CurLoc.isInvalid() || CurLoc.isMacroID() || LexicalBlockStack.empty())
3589  return;
3590 
3591  llvm::MDNode *Scope = LexicalBlockStack.back();
3592  Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(
3593  getLineNumber(CurLoc), getColumnNumber(CurLoc), Scope, CurInlinedAt));
3594 }
3595 
3596 void CGDebugInfo::CreateLexicalBlock(SourceLocation Loc) {
3597  llvm::MDNode *Back = nullptr;
3598  if (!LexicalBlockStack.empty())
3599  Back = LexicalBlockStack.back().get();
3600  LexicalBlockStack.emplace_back(DBuilder.createLexicalBlock(
3601  cast<llvm::DIScope>(Back), getOrCreateFile(CurLoc), getLineNumber(CurLoc),
3602  getColumnNumber(CurLoc)));
3603 }
3604 
3605 void CGDebugInfo::AppendAddressSpaceXDeref(
3606  unsigned AddressSpace, SmallVectorImpl<int64_t> &Expr) const {
3607  Optional<unsigned> DWARFAddressSpace =
3608  CGM.getTarget().getDWARFAddressSpace(AddressSpace);
3609  if (!DWARFAddressSpace)
3610  return;
3611 
3612  Expr.push_back(llvm::dwarf::DW_OP_constu);
3613  Expr.push_back(DWARFAddressSpace.getValue());
3614  Expr.push_back(llvm::dwarf::DW_OP_swap);
3615  Expr.push_back(llvm::dwarf::DW_OP_xderef);
3616 }
3617 
3619  SourceLocation Loc) {
3620  // Set our current location.
3621  setLocation(Loc);
3622 
3623  // Emit a line table change for the current location inside the new scope.
3624  Builder.SetCurrentDebugLocation(
3625  llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc),
3626  LexicalBlockStack.back(), CurInlinedAt));
3627 
3628  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
3629  return;
3630 
3631  // Create a new lexical block and push it on the stack.
3632  CreateLexicalBlock(Loc);
3633 }
3634 
3636  SourceLocation Loc) {
3637  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3638 
3639  // Provide an entry in the line table for the end of the block.
3640  EmitLocation(Builder, Loc);
3641 
3642  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
3643  return;
3644 
3645  LexicalBlockStack.pop_back();
3646 }
3647 
3648 void CGDebugInfo::EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn) {
3649  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3650  unsigned RCount = FnBeginRegionCount.back();
3651  assert(RCount <= LexicalBlockStack.size() && "Region stack mismatch");
3652 
3653  // Pop all regions for this function.
3654  while (LexicalBlockStack.size() != RCount) {
3655  // Provide an entry in the line table for the end of the block.
3656  EmitLocation(Builder, CurLoc);
3657  LexicalBlockStack.pop_back();
3658  }
3659  FnBeginRegionCount.pop_back();
3660 
3661  if (Fn && Fn->getSubprogram())
3662  DBuilder.finalizeSubprogram(Fn->getSubprogram());
3663 }
3664 
3665 CGDebugInfo::BlockByRefType
3666 CGDebugInfo::EmitTypeForVarWithBlocksAttr(const VarDecl *VD,
3667  uint64_t *XOffset) {
3669  QualType FType;
3670  uint64_t FieldSize, FieldOffset;
3671  uint32_t FieldAlign;
3672 
3673  llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
3674  QualType Type = VD->getType();
3675 
3676  FieldOffset = 0;
3677  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
3678  EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
3679  EltTys.push_back(CreateMemberType(Unit, FType, "__forwarding", &FieldOffset));
3680  FType = CGM.getContext().IntTy;
3681  EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
3682  EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset));
3683 
3684  bool HasCopyAndDispose = CGM.getContext().BlockRequiresCopying(Type, VD);
3685  if (HasCopyAndDispose) {
3686  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
3687  EltTys.push_back(
3688  CreateMemberType(Unit, FType, "__copy_helper", &FieldOffset));
3689  EltTys.push_back(
3690  CreateMemberType(Unit, FType, "__destroy_helper", &FieldOffset));
3691  }
3692  bool HasByrefExtendedLayout;
3693  Qualifiers::ObjCLifetime Lifetime;
3694  if (CGM.getContext().getByrefLifetime(Type, Lifetime,
3695  HasByrefExtendedLayout) &&
3696  HasByrefExtendedLayout) {
3697  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
3698  EltTys.push_back(
3699  CreateMemberType(Unit, FType, "__byref_variable_layout", &FieldOffset));
3700  }
3701 
3702  CharUnits Align = CGM.getContext().getDeclAlign(VD);
3703  if (Align > CGM.getContext().toCharUnitsFromBits(
3704  CGM.getTarget().getPointerAlign(0))) {
3705  CharUnits FieldOffsetInBytes =
3706  CGM.getContext().toCharUnitsFromBits(FieldOffset);
3707  CharUnits AlignedOffsetInBytes = FieldOffsetInBytes.alignTo(Align);
3708  CharUnits NumPaddingBytes = AlignedOffsetInBytes - FieldOffsetInBytes;
3709 
3710  if (NumPaddingBytes.isPositive()) {
3711  llvm::APInt pad(32, NumPaddingBytes.getQuantity());
3712  FType = CGM.getContext().getConstantArrayType(CGM.getContext().CharTy,
3713  pad, ArrayType::Normal, 0);
3714  EltTys.push_back(CreateMemberType(Unit, FType, "", &FieldOffset));
3715  }
3716  }
3717 
3718  FType = Type;
3719  llvm::DIType *WrappedTy = getOrCreateType(FType, Unit);
3720  FieldSize = CGM.getContext().getTypeSize(FType);
3721  FieldAlign = CGM.getContext().toBits(Align);
3722 
3723  *XOffset = FieldOffset;
3724  llvm::DIType *FieldTy = DBuilder.createMemberType(
3725  Unit, VD->getName(), Unit, 0, FieldSize, FieldAlign, FieldOffset,
3726  llvm::DINode::FlagZero, WrappedTy);
3727  EltTys.push_back(FieldTy);
3728  FieldOffset += FieldSize;
3729 
3730  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
3731  return {DBuilder.createStructType(Unit, "", Unit, 0, FieldOffset, 0,
3732  llvm::DINode::FlagZero, nullptr, Elements),
3733  WrappedTy};
3734 }
3735 
3736 llvm::DILocalVariable *CGDebugInfo::EmitDeclare(const VarDecl *VD,
3737  llvm::Value *Storage,
3739  CGBuilderTy &Builder) {
3740  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3741  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3742  if (VD->hasAttr<NoDebugAttr>())
3743  return nullptr;
3744 
3745  bool Unwritten =
3746  VD->isImplicit() || (isa<Decl>(VD->getDeclContext()) &&
3747  cast<Decl>(VD->getDeclContext())->isImplicit());
3748  llvm::DIFile *Unit = nullptr;
3749  if (!Unwritten)
3750  Unit = getOrCreateFile(VD->getLocation());
3751  llvm::DIType *Ty;
3752  uint64_t XOffset = 0;
3753  if (VD->hasAttr<BlocksAttr>())
3754  Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType;
3755  else
3756  Ty = getOrCreateType(VD->getType(), Unit);
3757 
3758  // If there is no debug info for this type then do not emit debug info
3759  // for this variable.
3760  if (!Ty)
3761  return nullptr;
3762 
3763  // Get location information.
3764  unsigned Line = 0;
3765  unsigned Column = 0;
3766  if (!Unwritten) {
3767  Line = getLineNumber(VD->getLocation());
3768  Column = getColumnNumber(VD->getLocation());
3769  }
3771  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3772  if (VD->isImplicit())
3773  Flags |= llvm::DINode::FlagArtificial;
3774 
3775  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3776 
3777  unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(VD->getType());
3778  AppendAddressSpaceXDeref(AddressSpace, Expr);
3779 
3780  // If this is implicit parameter of CXXThis or ObjCSelf kind, then give it an
3781  // object pointer flag.
3782  if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) {
3783  if (IPD->getParameterKind() == ImplicitParamDecl::CXXThis ||
3784  IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf)
3785  Flags |= llvm::DINode::FlagObjectPointer;
3786  }
3787 
3788  // Note: Older versions of clang used to emit byval references with an extra
3789  // DW_OP_deref, because they referenced the IR arg directly instead of
3790  // referencing an alloca. Newer versions of LLVM don't treat allocas
3791  // differently from other function arguments when used in a dbg.declare.
3792  auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
3793  StringRef Name = VD->getName();
3794  if (!Name.empty()) {
3795  if (VD->hasAttr<BlocksAttr>()) {
3796  // Here, we need an offset *into* the alloca.
3797  CharUnits offset = CharUnits::fromQuantity(32);
3798  Expr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3799  // offset of __forwarding field
3800  offset = CGM.getContext().toCharUnitsFromBits(
3801  CGM.getTarget().getPointerWidth(0));
3802  Expr.push_back(offset.getQuantity());
3803  Expr.push_back(llvm::dwarf::DW_OP_deref);
3804  Expr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3805  // offset of x field
3806  offset = CGM.getContext().toCharUnitsFromBits(XOffset);
3807  Expr.push_back(offset.getQuantity());
3808  }
3809  } else if (const auto *RT = dyn_cast<RecordType>(VD->getType())) {
3810  // If VD is an anonymous union then Storage represents value for
3811  // all union fields.
3812  const RecordDecl *RD = RT->getDecl();
3813  if (RD->isUnion() && RD->isAnonymousStructOrUnion()) {
3814  // GDB has trouble finding local variables in anonymous unions, so we emit
3815  // artificial local variables for each of the members.
3816  //
3817  // FIXME: Remove this code as soon as GDB supports this.
3818  // The debug info verifier in LLVM operates based on the assumption that a
3819  // variable has the same size as its storage and we had to disable the
3820  // check for artificial variables.
3821  for (const auto *Field : RD->fields()) {
3822  llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
3823  StringRef FieldName = Field->getName();
3824 
3825  // Ignore unnamed fields. Do not ignore unnamed records.
3826  if (FieldName.empty() && !isa<RecordType>(Field->getType()))
3827  continue;
3828 
3829  // Use VarDecl's Tag, Scope and Line number.
3830  auto FieldAlign = getDeclAlignIfRequired(Field, CGM.getContext());
3831  auto *D = DBuilder.createAutoVariable(
3832  Scope, FieldName, Unit, Line, FieldTy, CGM.getLangOpts().Optimize,
3833  Flags | llvm::DINode::FlagArtificial, FieldAlign);
3834 
3835  // Insert an llvm.dbg.declare into the current block.
3836  DBuilder.insertDeclare(
3837  Storage, D, DBuilder.createExpression(Expr),
3838  llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt),
3839  Builder.GetInsertBlock());
3840  }
3841  }
3842  }
3843 
3844  // Create the descriptor for the variable.
3845  auto *D = ArgNo ? DBuilder.createParameterVariable(
3846  Scope, Name, *ArgNo, Unit, Line, Ty,
3847  CGM.getLangOpts().Optimize, Flags)
3848  : DBuilder.createAutoVariable(Scope, Name, Unit, Line, Ty,
3849  CGM.getLangOpts().Optimize,
3850  Flags, Align);
3851 
3852  // Insert an llvm.dbg.declare into the current block.
3853  DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(Expr),
3854  llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt),
3855  Builder.GetInsertBlock());
3856 
3857  return D;
3858 }
3859 
3860 llvm::DILocalVariable *
3862  CGBuilderTy &Builder) {
3863  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3864  return EmitDeclare(VD, Storage, llvm::None, Builder);
3865 }
3866 
3867 llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy,
3868  llvm::DIType *Ty) {
3869  llvm::DIType *CachedTy = getTypeOrNull(QualTy);
3870  if (CachedTy)
3871  Ty = CachedTy;
3872  return DBuilder.createObjectPointerType(Ty);
3873 }
3874 
3876  const VarDecl *VD, llvm::Value *Storage, CGBuilderTy &Builder,
3877  const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint) {
3878  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3879  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3880 
3881  if (Builder.GetInsertBlock() == nullptr)
3882  return;
3883  if (VD->hasAttr<NoDebugAttr>())
3884  return;
3885 
3886  bool isByRef = VD->hasAttr<BlocksAttr>();
3887 
3888  uint64_t XOffset = 0;
3889  llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
3890  llvm::DIType *Ty;
3891  if (isByRef)
3892  Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType;
3893  else
3894  Ty = getOrCreateType(VD->getType(), Unit);
3895 
3896  // Self is passed along as an implicit non-arg variable in a
3897  // block. Mark it as the object pointer.
3898  if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD))
3899  if (IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf)
3900  Ty = CreateSelfType(VD->getType(), Ty);
3901 
3902  // Get location information.
3903  unsigned Line = getLineNumber(VD->getLocation());
3904  unsigned Column = getColumnNumber(VD->getLocation());
3905 
3906  const llvm::DataLayout &target = CGM.getDataLayout();
3907 
3909  target.getStructLayout(blockInfo.StructureType)
3910  ->getElementOffset(blockInfo.getCapture(VD).getIndex()));
3911 
3913  addr.push_back(llvm::dwarf::DW_OP_deref);
3914  addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3915  addr.push_back(offset.getQuantity());
3916  if (isByRef) {
3917  addr.push_back(llvm::dwarf::DW_OP_deref);
3918  addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3919  // offset of __forwarding field
3920  offset =
3921  CGM.getContext().toCharUnitsFromBits(target.getPointerSizeInBits(0));
3922  addr.push_back(offset.getQuantity());
3923  addr.push_back(llvm::dwarf::DW_OP_deref);
3924  addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3925  // offset of x field
3926  offset = CGM.getContext().toCharUnitsFromBits(XOffset);
3927  addr.push_back(offset.getQuantity());
3928  }
3929 
3930  // Create the descriptor for the variable.
3931  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3932  auto *D = DBuilder.createAutoVariable(
3933  cast<llvm::DILocalScope>(LexicalBlockStack.back()), VD->getName(), Unit,
3934  Line, Ty, false, llvm::DINode::FlagZero, Align);
3935 
3936  // Insert an llvm.dbg.declare into the current block.
3937  auto DL =
3938  llvm::DebugLoc::get(Line, Column, LexicalBlockStack.back(), CurInlinedAt);
3939  auto *Expr = DBuilder.createExpression(addr);
3940  if (InsertPoint)
3941  DBuilder.insertDeclare(Storage, D, Expr, DL, InsertPoint);
3942  else
3943  DBuilder.insertDeclare(Storage, D, Expr, DL, Builder.GetInsertBlock());
3944 }
3945 
3947  unsigned ArgNo,
3948  CGBuilderTy &Builder) {
3949  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3950  EmitDeclare(VD, AI, ArgNo, Builder);
3951 }
3952 
3953 namespace {
3954 struct BlockLayoutChunk {
3955  uint64_t OffsetInBits;
3956  const BlockDecl::Capture *Capture;
3957 };
3958 bool operator<(const BlockLayoutChunk &l, const BlockLayoutChunk &r) {
3959  return l.OffsetInBits < r.OffsetInBits;
3960 }
3961 } // namespace
3962 
3963 void CGDebugInfo::collectDefaultFieldsForBlockLiteralDeclare(
3964  const CGBlockInfo &Block, const ASTContext &Context, SourceLocation Loc,
3965  const llvm::StructLayout &BlockLayout, llvm::DIFile *Unit,
3967  // Blocks in OpenCL have unique constraints which make the standard fields
3968  // redundant while requiring size and align fields for enqueue_kernel. See
3969  // initializeForBlockHeader in CGBlocks.cpp
3970  if (CGM.getLangOpts().OpenCL) {
3971  Fields.push_back(createFieldType("__size", Context.IntTy, Loc, AS_public,
3972  BlockLayout.getElementOffsetInBits(0),
3973  Unit, Unit));
3974  Fields.push_back(createFieldType("__align", Context.IntTy, Loc, AS_public,
3975  BlockLayout.getElementOffsetInBits(1),
3976  Unit, Unit));
3977  } else {
3978  Fields.push_back(createFieldType("__isa", Context.VoidPtrTy, Loc, AS_public,
3979  BlockLayout.getElementOffsetInBits(0),
3980  Unit, Unit));
3981  Fields.push_back(createFieldType("__flags", Context.IntTy, Loc, AS_public,
3982  BlockLayout.getElementOffsetInBits(1),
3983  Unit, Unit));
3984  Fields.push_back(
3985  createFieldType("__reserved", Context.IntTy, Loc, AS_public,
3986  BlockLayout.getElementOffsetInBits(2), Unit, Unit));
3987  auto *FnTy = Block.getBlockExpr()->getFunctionType();
3988  auto FnPtrType = CGM.getContext().getPointerType(FnTy->desugar());
3989  Fields.push_back(createFieldType("__FuncPtr", FnPtrType, Loc, AS_public,
3990  BlockLayout.getElementOffsetInBits(3),
3991  Unit, Unit));
3992  Fields.push_back(createFieldType(
3993  "__descriptor",
3994  Context.getPointerType(Block.NeedsCopyDispose
3995  ? Context.getBlockDescriptorExtendedType()
3996  : Context.getBlockDescriptorType()),
3997  Loc, AS_public, BlockLayout.getElementOffsetInBits(4), Unit, Unit));
3998  }
3999 }
4000 
4002  StringRef Name,
4003  unsigned ArgNo,
4004  llvm::AllocaInst *Alloca,
4005  CGBuilderTy &Builder) {
4006  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4007  ASTContext &C = CGM.getContext();
4008  const BlockDecl *blockDecl = block.getBlockDecl();
4009 
4010  // Collect some general information about the block's location.
4011  SourceLocation loc = blockDecl->getCaretLocation();
4012  llvm::DIFile *tunit = getOrCreateFile(loc);
4013  unsigned line = getLineNumber(loc);
4014  unsigned column = getColumnNumber(loc);
4015 
4016  // Build the debug-info type for the block literal.
4017  getDeclContextDescriptor(blockDecl);
4018 
4019  const llvm::StructLayout *blockLayout =
4020  CGM.getDataLayout().getStructLayout(block.StructureType);
4021 
4023  collectDefaultFieldsForBlockLiteralDeclare(block, C, loc, *blockLayout, tunit,
4024  fields);
4025 
4026  // We want to sort the captures by offset, not because DWARF
4027  // requires this, but because we're paranoid about debuggers.
4029 
4030  // 'this' capture.
4031  if (blockDecl->capturesCXXThis()) {
4032  BlockLayoutChunk chunk;
4033  chunk.OffsetInBits =
4034  blockLayout->getElementOffsetInBits(block.CXXThisIndex);
4035  chunk.Capture = nullptr;
4036  chunks.push_back(chunk);
4037  }
4038 
4039  // Variable captures.
4040  for (const auto &capture : blockDecl->captures()) {
4041  const VarDecl *variable = capture.getVariable();
4042  const CGBlockInfo::Capture &captureInfo = block.getCapture(variable);
4043 
4044  // Ignore constant captures.
4045  if (captureInfo.isConstant())
4046  continue;
4047 
4048  BlockLayoutChunk chunk;
4049  chunk.OffsetInBits =
4050  blockLayout->getElementOffsetInBits(captureInfo.getIndex());
4051  chunk.Capture = &capture;
4052  chunks.push_back(chunk);
4053  }
4054 
4055  // Sort by offset.
4056  llvm::array_pod_sort(chunks.begin(), chunks.end());
4057 
4058  for (const BlockLayoutChunk &Chunk : chunks) {
4059  uint64_t offsetInBits = Chunk.OffsetInBits;
4060  const BlockDecl::Capture *capture = Chunk.Capture;
4061 
4062  // If we have a null capture, this must be the C++ 'this' capture.
4063  if (!capture) {
4064  QualType type;
4065  if (auto *Method =
4066  cast_or_null<CXXMethodDecl>(blockDecl->getNonClosureContext()))
4067  type = Method->getThisType(C);
4068  else if (auto *RDecl = dyn_cast<CXXRecordDecl>(blockDecl->getParent()))
4069  type = QualType(RDecl->getTypeForDecl(), 0);
4070  else
4071  llvm_unreachable("unexpected block declcontext");
4072 
4073  fields.push_back(createFieldType("this", type, loc, AS_public,
4074  offsetInBits, tunit, tunit));
4075  continue;
4076  }
4077 
4078  const VarDecl *variable = capture->getVariable();
4079  StringRef name = variable->getName();
4080 
4081  llvm::DIType *fieldType;
4082  if (capture->isByRef()) {
4083  TypeInfo PtrInfo = C.getTypeInfo(C.VoidPtrTy);
4084  auto Align = PtrInfo.AlignIsRequired ? PtrInfo.Align : 0;
4085  // FIXME: This recomputes the layout of the BlockByRefWrapper.
4086  uint64_t xoffset;
4087  fieldType =
4088  EmitTypeForVarWithBlocksAttr(variable, &xoffset).BlockByRefWrapper;
4089  fieldType = DBuilder.createPointerType(fieldType, PtrInfo.Width);
4090  fieldType = DBuilder.createMemberType(tunit, name, tunit, line,
4091  PtrInfo.Width, Align, offsetInBits,
4092  llvm::DINode::FlagZero, fieldType);
4093  } else {
4094  auto Align = getDeclAlignIfRequired(variable, CGM.getContext());
4095  fieldType = createFieldType(name, variable->getType(), loc, AS_public,
4096  offsetInBits, Align, tunit, tunit);
4097  }
4098  fields.push_back(fieldType);
4099  }
4100 
4101  SmallString<36> typeName;
4102  llvm::raw_svector_ostream(typeName)
4103  << "__block_literal_" << CGM.getUniqueBlockCount();
4104 
4105  llvm::DINodeArray fieldsArray = DBuilder.getOrCreateArray(fields);
4106 
4107  llvm::DIType *type =
4108  DBuilder.createStructType(tunit, typeName.str(), tunit, line,
4109  CGM.getContext().toBits(block.BlockSize), 0,
4110  llvm::DINode::FlagZero, nullptr, fieldsArray);
4111  type = DBuilder.createPointerType(type, CGM.PointerWidthInBits);
4112 
4113  // Get overall information about the block.
4114  llvm::DINode::DIFlags flags = llvm::DINode::FlagArtificial;
4115  auto *scope = cast<llvm::DILocalScope>(LexicalBlockStack.back());
4116 
4117  // Create the descriptor for the parameter.
4118  auto *debugVar = DBuilder.createParameterVariable(
4119  scope, Name, ArgNo, tunit, line, type, CGM.getLangOpts().Optimize, flags);
4120 
4121  // Insert an llvm.dbg.declare into the current block.
4122  DBuilder.insertDeclare(Alloca, debugVar, DBuilder.createExpression(),
4123  llvm::DebugLoc::get(line, column, scope, CurInlinedAt),
4124  Builder.GetInsertBlock());
4125 }
4126 
4127 llvm::DIDerivedType *
4128 CGDebugInfo::getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D) {
4129  if (!D->isStaticDataMember())
4130  return nullptr;
4131 
4132  auto MI = StaticDataMemberCache.find(D->getCanonicalDecl());
4133  if (MI != StaticDataMemberCache.end()) {
4134  assert(MI->second && "Static data member declaration should still exist");
4135  return MI->second;
4136  }
4137 
4138  // If the member wasn't found in the cache, lazily construct and add it to the
4139  // type (used when a limited form of the type is emitted).
4140  auto DC = D->getDeclContext();
4141  auto *Ctxt = cast<llvm::DICompositeType>(getDeclContextDescriptor(D));
4142  return CreateRecordStaticField(D, Ctxt, cast<RecordDecl>(DC));
4143 }
4144 
4145 llvm::DIGlobalVariableExpression *CGDebugInfo::CollectAnonRecordDecls(
4146  const RecordDecl *RD, llvm::DIFile *Unit, unsigned LineNo,
4147  StringRef LinkageName, llvm::GlobalVariable *Var, llvm::DIScope *DContext) {
4148  llvm::DIGlobalVariableExpression *GVE = nullptr;
4149 
4150  for (const auto *Field : RD->fields()) {
4151  llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
4152  StringRef FieldName = Field->getName();
4153 
4154  // Ignore unnamed fields, but recurse into anonymous records.
4155  if (FieldName.empty()) {
4156  if (const auto *RT = dyn_cast<RecordType>(Field->getType()))
4157  GVE = CollectAnonRecordDecls(RT->getDecl(), Unit, LineNo, LinkageName,
4158  Var, DContext);
4159  continue;
4160  }
4161  // Use VarDecl's Tag, Scope and Line number.
4162  GVE = DBuilder.createGlobalVariableExpression(
4163  DContext, FieldName, LinkageName, Unit, LineNo, FieldTy,
4164  Var->hasLocalLinkage());
4165  Var->addDebugInfo(GVE);
4166  }
4167  return GVE;
4168 }
4169 
4170 void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
4171  const VarDecl *D) {
4172  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4173  if (D->hasAttr<NoDebugAttr>())
4174  return;
4175 
4176  // If we already created a DIGlobalVariable for this declaration, just attach
4177  // it to the llvm::GlobalVariable.
4178  auto Cached = DeclCache.find(D->getCanonicalDecl());
4179  if (Cached != DeclCache.end())
4180  return Var->addDebugInfo(
4181  cast<llvm::DIGlobalVariableExpression>(Cached->second));
4182 
4183  // Create global variable debug descriptor.
4184  llvm::DIFile *Unit = nullptr;
4185  llvm::DIScope *DContext = nullptr;
4186  unsigned LineNo;
4187  StringRef DeclName, LinkageName;
4188  QualType T;
4189  llvm::MDTuple *TemplateParameters = nullptr;
4190  collectVarDeclProps(D, Unit, LineNo, T, DeclName, LinkageName,
4191  TemplateParameters, DContext);
4192 
4193  // Attempt to store one global variable for the declaration - even if we
4194  // emit a lot of fields.
4195  llvm::DIGlobalVariableExpression *GVE = nullptr;
4196 
4197  // If this is an anonymous union then we'll want to emit a global
4198  // variable for each member of the anonymous union so that it's possible
4199  // to find the name of any field in the union.
4200  if (T->isUnionType() && DeclName.empty()) {
4201  const RecordDecl *RD = T->castAs<RecordType>()->getDecl();
4202  assert(RD->isAnonymousStructOrUnion() &&
4203  "unnamed non-anonymous struct or union?");
4204  GVE = CollectAnonRecordDecls(RD, Unit, LineNo, LinkageName, Var, DContext);
4205  } else {
4206  auto Align = getDeclAlignIfRequired(D, CGM.getContext());
4207 
4209  unsigned AddressSpace =
4210  CGM.getContext().getTargetAddressSpace(D->getType());
4211  AppendAddressSpaceXDeref(AddressSpace, Expr);
4212 
4213  GVE = DBuilder.createGlobalVariableExpression(
4214  DContext, DeclName, LinkageName, Unit, LineNo, getOrCreateType(T, Unit),
4215  Var->hasLocalLinkage(),
4216  Expr.empty() ? nullptr : DBuilder.createExpression(Expr),
4217  getOrCreateStaticDataMemberDeclarationOrNull(D), TemplateParameters,
4218  Align);
4219  Var->addDebugInfo(GVE);
4220  }
4221  DeclCache[D->getCanonicalDecl()].reset(GVE);
4222 }
4223 
4224 void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) {
4225  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4226  if (VD->hasAttr<NoDebugAttr>())
4227  return;
4228  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
4229  // Create the descriptor for the variable.
4230  llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
4231  StringRef Name = VD->getName();
4232  llvm::DIType *Ty = getOrCreateType(VD->getType(), Unit);
4233  if (const auto *ECD = dyn_cast<EnumConstantDecl>(VD)) {
4234  const auto *ED = cast<EnumDecl>(ECD->getDeclContext());
4235  assert(isa<EnumType>(ED->getTypeForDecl()) && "Enum without EnumType?");
4236  Ty = getOrCreateType(QualType(ED->getTypeForDecl(), 0), Unit);
4237  }
4238  // Do not use global variables for enums.
4239  //
4240  // FIXME: why not?
4241  if (Ty->getTag() == llvm::dwarf::DW_TAG_enumeration_type)
4242  return;
4243  // Do not emit separate definitions for function local const/statics.
4244  if (isa<FunctionDecl>(VD->getDeclContext()))
4245  return;
4246  VD = cast<ValueDecl>(VD->getCanonicalDecl());
4247  auto *VarD = cast<VarDecl>(VD);
4248  if (VarD->isStaticDataMember()) {
4249  auto *RD = cast<RecordDecl>(VarD->getDeclContext());
4250  getDeclContextDescriptor(VarD);
4251  // Ensure that the type is retained even though it's otherwise unreferenced.
4252  //
4253  // FIXME: This is probably unnecessary, since Ty should reference RD
4254  // through its scope.
4255  RetainedTypes.push_back(
4256  CGM.getContext().getRecordType(RD).getAsOpaquePtr());
4257  return;
4258  }
4259 
4260  llvm::DIScope *DContext = getDeclContextDescriptor(VD);
4261 
4262  auto &GV = DeclCache[VD];
4263  if (GV)
4264  return;
4265  llvm::DIExpression *InitExpr = nullptr;
4266  if (CGM.getContext().getTypeSize(VD->getType()) <= 64) {
4267  // FIXME: Add a representation for integer constants wider than 64 bits.
4268  if (Init.isInt())
4269  InitExpr =
4270  DBuilder.createConstantValueExpression(Init.getInt().getExtValue());
4271  else if (Init.isFloat())
4272  InitExpr = DBuilder.createConstantValueExpression(
4273  Init.getFloat().bitcastToAPInt().getZExtValue());
4274  }
4275 
4276  llvm::MDTuple *TemplateParameters = nullptr;
4277 
4278  if (isa<VarTemplateSpecializationDecl>(VD))
4279  if (VarD) {
4280  llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VarD, &*Unit);
4281  TemplateParameters = parameterNodes.get();
4282  }
4283 
4284  GV.reset(DBuilder.createGlobalVariableExpression(
4285  DContext, Name, StringRef(), Unit, getLineNumber(VD->getLocation()), Ty,
4286  true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VarD),
4287  TemplateParameters, Align));
4288 }
4289 
4290 llvm::DIScope *CGDebugInfo::getCurrentContextDescriptor(const Decl *D) {
4291  if (!LexicalBlockStack.empty())
4292  return LexicalBlockStack.back();
4293  llvm::DIScope *Mod = getParentModuleOrNull(D);
4294  return getContextDescriptor(D, Mod ? Mod : TheCU);
4295 }
4296 
4298  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4299  return;
4300  const NamespaceDecl *NSDecl = UD.getNominatedNamespace();
4301  if (!NSDecl->isAnonymousNamespace() ||
4302  CGM.getCodeGenOpts().DebugExplicitImport) {
4303  auto Loc = UD.getLocation();
4304  DBuilder.createImportedModule(
4305  getCurrentContextDescriptor(cast<Decl>(UD.getDeclContext())),
4306  getOrCreateNamespace(NSDecl), getOrCreateFile(Loc), getLineNumber(Loc));
4307  }
4308 }
4309 
4311  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4312  return;
4313  assert(UD.shadow_size() &&
4314  "We shouldn't be codegening an invalid UsingDecl containing no decls");
4315  // Emitting one decl is sufficient - debuggers can detect that this is an
4316  // overloaded name & provide lookup for all the overloads.
4317  const UsingShadowDecl &USD = **UD.shadow_begin();
4318 
4319  // FIXME: Skip functions with undeduced auto return type for now since we
4320  // don't currently have the plumbing for separate declarations & definitions
4321  // of free functions and mismatched types (auto in the declaration, concrete
4322  // return type in the definition)
4323  if (const auto *FD = dyn_cast<FunctionDecl>(USD.getUnderlyingDecl()))
4324  if (const auto *AT =
4325  FD->getType()->getAs<FunctionProtoType>()->getContainedAutoType())
4326  if (AT->getDeducedType().isNull())
4327  return;
4328  if (llvm::DINode *Target =
4329  getDeclarationOrDefinition(USD.getUnderlyingDecl())) {
4330  auto Loc = USD.getLocation();
4331  DBuilder.createImportedDeclaration(
4332  getCurrentContextDescriptor(cast<Decl>(USD.getDeclContext())), Target,
4333  getOrCreateFile(Loc), getLineNumber(Loc));
4334  }
4335 }
4336 
4338  if (CGM.getCodeGenOpts().getDebuggerTuning() != llvm::DebuggerKind::LLDB)
4339  return;
4340  if (Module *M = ID.getImportedModule()) {
4342  auto Loc = ID.getLocation();
4343  DBuilder.createImportedDeclaration(
4344  getCurrentContextDescriptor(cast<Decl>(ID.getDeclContext())),
4345  getOrCreateModuleRef(Info, DebugTypeExtRefs), getOrCreateFile(Loc),
4346  getLineNumber(Loc));
4347  }
4348 }
4349 
4350 llvm::DIImportedEntity *
4352  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4353  return nullptr;
4354  auto &VH = NamespaceAliasCache[&NA];
4355  if (VH)
4356  return cast<llvm::DIImportedEntity>(VH);
4357  llvm::DIImportedEntity *R;
4358  auto Loc = NA.getLocation();
4359  if (const auto *Underlying =
4360  dyn_cast<NamespaceAliasDecl>(NA.getAliasedNamespace()))
4361  // This could cache & dedup here rather than relying on metadata deduping.
4362  R = DBuilder.createImportedDeclaration(
4363  getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())),
4364  EmitNamespaceAlias(*Underlying), getOrCreateFile(Loc),
4365  getLineNumber(Loc), NA.getName());
4366  else
4367  R = DBuilder.createImportedDeclaration(
4368  getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())),
4369  getOrCreateNamespace(cast<NamespaceDecl>(NA.getAliasedNamespace())),
4370  getOrCreateFile(Loc), getLineNumber(Loc), NA.getName());
4371  VH.reset(R);
4372  return R;
4373 }
4374 
4375 llvm::DINamespace *
4376 CGDebugInfo::getOrCreateNamespace(const NamespaceDecl *NSDecl) {
4377  // Don't canonicalize the NamespaceDecl here: The DINamespace will be uniqued
4378  // if necessary, and this way multiple declarations of the same namespace in
4379  // different parent modules stay distinct.
4380  auto I = NamespaceCache.find(NSDecl);
4381  if (I != NamespaceCache.end())
4382  return cast<llvm::DINamespace>(I->second);
4383 
4384  llvm::DIScope *Context = getDeclContextDescriptor(NSDecl);
4385  // Don't trust the context if it is a DIModule (see comment above).
4386  llvm::DINamespace *NS =
4387  DBuilder.createNameSpace(Context, NSDecl->getName(), NSDecl->isInline());
4388  NamespaceCache[NSDecl].reset(NS);
4389  return NS;
4390 }
4391 
4392 void CGDebugInfo::setDwoId(uint64_t Signature) {
4393  assert(TheCU && "no main compile unit");
4394  TheCU->setDWOId(Signature);
4395 }
4396 
4398  // Creating types might create further types - invalidating the current
4399  // element and the size(), so don't cache/reference them.
4400  for (size_t i = 0; i != ObjCInterfaceCache.size(); ++i) {
4401  ObjCInterfaceCacheEntry E = ObjCInterfaceCache[i];
4402  llvm::DIType *Ty = E.Type->getDecl()->getDefinition()
4403  ? CreateTypeDefinition(E.Type, E.Unit)
4404  : E.Decl;
4405  DBuilder.replaceTemporary(llvm::TempDIType(E.Decl), Ty);
4406  }
4407 
4408  if (CGM.getCodeGenOpts().DwarfVersion >= 5) {
4409  // Add methods to interface.
4410  for (const auto &P : ObjCMethodCache) {
4411  if (P.second.empty())
4412  continue;
4413 
4414  QualType QTy(P.first->getTypeForDecl(), 0);
4415  auto It = TypeCache.find(QTy.getAsOpaquePtr());
4416  assert(It != TypeCache.end());
4417 
4418  llvm::DICompositeType *InterfaceDecl =
4419  cast<llvm::DICompositeType>(It->second);
4420 
4422  auto CurrenetElts = InterfaceDecl->getElements();
4423  EltTys.append(CurrenetElts.begin(), CurrenetElts.end());
4424  for (auto &MD : P.second)
4425  EltTys.push_back(MD);
4426  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
4427  DBuilder.replaceArrays(InterfaceDecl, Elements);
4428  }
4429  }
4430 
4431  for (const auto &P : ReplaceMap) {
4432  assert(P.second);
4433  auto *Ty = cast<llvm::DIType>(P.second);
4434  assert(Ty->isForwardDecl());
4435 
4436  auto It = TypeCache.find(P.first);
4437  assert(It != TypeCache.end());
4438  assert(It->second);
4439 
4440  DBuilder.replaceTemporary(llvm::TempDIType(Ty),
4441  cast<llvm::DIType>(It->second));
4442  }
4443 
4444  for (const auto &P : FwdDeclReplaceMap) {
4445  assert(P.second);
4446  llvm::TempMDNode FwdDecl(cast<llvm::MDNode>(P.second));
4447  llvm::Metadata *Repl;
4448 
4449  auto It = DeclCache.find(P.first);
4450  // If there has been no definition for the declaration, call RAUW
4451  // with ourselves, that will destroy the temporary MDNode and
4452  // replace it with a standard one, avoiding leaking memory.
4453  if (It == DeclCache.end())
4454  Repl = P.second;
4455  else
4456  Repl = It->second;
4457 
4458  if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(Repl))
4459  Repl = GVE->getVariable();
4460  DBuilder.replaceTemporary(std::move(FwdDecl), cast<llvm::MDNode>(Repl));
4461  }
4462 
4463  // We keep our own list of retained types, because we need to look
4464  // up the final type in the type cache.
4465  for (auto &RT : RetainedTypes)
4466  if (auto MD = TypeCache[RT])
4467  DBuilder.retainType(cast<llvm::DIType>(MD));
4468 
4469  DBuilder.finalize();
4470 }
4471 
4473  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4474  return;
4475 
4476  if (auto *DieTy = getOrCreateType(Ty, TheCU->getFile()))
4477  // Don't ignore in case of explicit cast where it is referenced indirectly.
4478  DBuilder.retainType(DieTy);
4479 }
4480 
4482  if (LexicalBlockStack.empty())
4483  return llvm::DebugLoc();
4484 
4485  llvm::MDNode *Scope = LexicalBlockStack.back();
4486  return llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc), Scope);
4487 }
4488 
4489 llvm::DINode::DIFlags CGDebugInfo::getCallSiteRelatedAttrs() const {
4490  // Call site-related attributes are only useful in optimized programs, and
4491  // when there's a possibility of debugging backtraces.
4492  if (!CGM.getLangOpts().Optimize || DebugKind == codegenoptions::NoDebugInfo ||
4493  DebugKind == codegenoptions::LocTrackingOnly)
4494  return llvm::DINode::FlagZero;
4495 
4496  // Call site-related attributes are available in DWARF v5. Some debuggers,
4497  // while not fully DWARF v5-compliant, may accept these attributes as if they
4498  // were part of DWARF v4.
4499  bool SupportsDWARFv4Ext =
4500  CGM.getCodeGenOpts().DwarfVersion == 4 &&
4501  CGM.getCodeGenOpts().getDebuggerTuning() == llvm::DebuggerKind::LLDB;
4502  if (!SupportsDWARFv4Ext && CGM.getCodeGenOpts().DwarfVersion < 5)
4503  return llvm::DINode::FlagZero;
4504 
4505  return llvm::DINode::FlagAllCallsDescribed;
4506 }
bool isNoReturn() const
Determines whether this function is known to be &#39;noreturn&#39;, through an attribute on its declaration o...
Definition: Decl.cpp:2934
const internal::VariadicAllOfMatcher< Type > type
Matches Types in the clang AST.
Defines the clang::ASTContext interface.
CharUnits alignTo(const CharUnits &Align) const
alignTo - Returns the next integer (mod 2**64) that is greater than or equal to this quantity and is ...
Definition: CharUnits.h:184
const Type * getTypeForDecl() const
Definition: DeclObjC.h:1911
VarDecl * getCapturedVar() const
Retrieve the declaration of the local variable being captured.
bool isStruct() const
Definition: Decl.h:3258
const Capture & getCapture(const VarDecl *var) const
Definition: CGBlocks.h:271
Represents a function declaration or definition.
Definition: Decl.h:1739
FunctionTemplateDecl * getTemplate() const
Retrieve the template from which this function was specialized.
Definition: DeclTemplate.h:550
StringRef Identifier
Definition: Format.cpp:1636
static bool hasDefaultSetterName(const ObjCPropertyDecl *PD, const ObjCMethodDecl *Setter)
bool isObjCQualifiedIdType() const
True if this is equivalent to &#39;id.
Definition: Type.h:5877
const FunctionProtoType * getFunctionType() const
getFunctionType - Return the underlying function type for this block.
Definition: Expr.cpp:2092
Smart pointer class that efficiently represents Objective-C method names.
A class which contains all the information about a particular captured value.
Definition: Decl.h:3873
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:752
StringRef getName(const PrintingPolicy &Policy) const
Definition: Type.cpp:2656
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2541
QualType getElementType() const
Definition: Type.h:6020
CanQualType VoidPtrTy
Definition: ASTContext.h:1043
QualType getPointeeType() const
Definition: Type.h:2554
void EmitLocation(raw_ostream &o, const SourceManager &SM, SourceLocation L, const FIDMap &FM, unsigned indent)
Definition: PlistSupport.h:108
bool isPrimaryBaseVirtual() const
isPrimaryBaseVirtual - Get whether the primary base for this record is virtual or not...
Definition: RecordLayout.h:226
static uint32_t getTypeAlignIfRequired(const Type *Ty, const ASTContext &Ctx)
Definition: CGDebugInfo.cpp:52
A (possibly-)qualified type.
Definition: Type.h:638
base_class_range bases()
Definition: DeclCXX.h:823
const CodeGenOptions & getCodeGenOpts() const
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.cpp:1144
void EmitExplicitCastType(QualType Ty)
Emit the type explicitly casted to.
void print(raw_ostream &OS, const PrintingPolicy &Policy, const Twine &PlaceHolder=Twine(), unsigned Indentation=0) const
Definition: Type.h:981
static ClassTemplateDecl * getDefinition(ClassTemplateDecl *D)
ArrayRef< TemplateArgument > getPackAsArray() const
Return the array of arguments in this template argument pack.
Definition: TemplateBase.h:366
Defines the clang::FileManager interface and associated types.
bool isMemberDataPointerType() const
Definition: Type.h:6342
QualType getDesugaredType(const ASTContext &Context) const
Return the specified type with any "sugar" removed from the type.
Definition: Type.h:938
std::string getClangFullVersion()
Retrieves a string representing the complete clang version, which includes the clang version number...
Definition: Version.cpp:118
TypePropertyCache< Private > Cache
Definition: Type.cpp:3494
llvm::DIType * getOrCreateRecordType(QualType Ty, SourceLocation L)
Emit record type&#39;s standalone debug info.
Kind getKind() const
Definition: Type.h:2422
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3359
void EmitLexicalBlockEnd(CGBuilderTy &Builder, SourceLocation Loc)
Emit metadata to indicate the end of a new lexical block and pop the current block.
CharUnits getBaseClassOffset(const CXXRecordDecl *Base) const
getBaseClassOffset - Get the offset, in chars, for the given base class.
Definition: RecordLayout.h:233
Defines the SourceManager interface.
static bool shouldOmitDefinition(codegenoptions::DebugInfoKind DebugKind, bool DebugTypeExtRefs, const RecordDecl *RD, const LangOptions &LangOpts)
The template argument is an expression, and we&#39;ve not resolved it to one of the other forms yet...
Definition: TemplateBase.h:87
bool isRecordType() const
Definition: Type.h:6373
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1932
const Type * getTypeForDecl() const
Definition: Decl.h:2907
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
TagDecl * getDecl() const
Definition: Type.cpp:3166
bool isVirtual() const
Definition: DeclCXX.h:2086
Selector getObjCSelector() const
Get the Objective-C selector stored in this declaration name.
Defines the C++ template declaration subclasses.
StringRef P
Parameter for C++ &#39;this&#39; argument.
Definition: Decl.h:1502
static QualType UnwrapTypeForDebugInfo(QualType T, const ASTContext &C)
static bool hasDefaultGetterName(const ObjCPropertyDecl *PD, const ObjCMethodDecl *Getter)
The base class of the type hierarchy.
Definition: Type.h:1411
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2816
Declaration of a variable template.
The template argument is a declaration that was provided for a pointer, reference, or pointer to member non-type template parameter.
Definition: TemplateBase.h:64
Represent a C++ namespace.
Definition: Decl.h:514
NamedDecl * getParam(unsigned Idx)
Definition: DeclTemplate.h:133
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:98
QualType getValueType() const
Gets the type contained by this atomic type, i.e.
Definition: Type.h:5987
static bool needsTypeIdentifier(const TagDecl *TD, CodeGenModule &CGM, llvm::DICompileUnit *TheCU)
Describes the capture of a variable or of this, or of a C++1y init-capture.
Definition: LambdaCapture.h:26
float __ovld __cnfn distance(float p0, float p1)
Returns the distance between p0 and p1.
MSInheritanceAttr::Spelling getMSInheritanceModel() const
Returns the inheritance model used for this record.
QualType getElementType() const
Definition: Type.h:2851
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3178
StringRef getBufferData(FileID FID, bool *Invalid=nullptr) const
Return a StringRef to the source buffer data for the specified FileID.
enumerator_range enumerators() const
Definition: Decl.h:3462
bool isInterface() const
Definition: Decl.h:3259
Represents a variable declaration or definition.
Definition: Decl.h:812
void removeObjCLifetime()
Definition: Type.h:332
QualType getReturnType() const
Definition: Decl.h:2303
bool isFixed() const
Returns true if this is an Objective-C, C++11, or Microsoft-style enumeration with a fixed underlying...
Definition: Decl.h:3538
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6734
Represents an empty template argument, e.g., one that has not been deduced.
Definition: TemplateBase.h:57
Extra information about a function prototype.
Definition: Type.h:3771
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:1997
A this pointer adjustment.
Definition: ABI.h:108
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:68
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
bool isStatic() const
Definition: DeclCXX.cpp:1872
void completeTemplateDefinition(const ClassTemplateSpecializationDecl &SD)
bool hasDefinition() const
Definition: DeclCXX.h:776
Represents a parameter to a function.
Definition: Decl.h:1551
QualType getIntegralType() const
Retrieve the type of the integral value.
Definition: TemplateBase.h:315
static llvm::dwarf::Tag getTagForRecord(const RecordDecl *RD)
The collection of all-type qualifiers we support.
Definition: Type.h:141
PipeType - OpenCL20.
Definition: Type.h:6006
bool isClass() const
Definition: Decl.h:3260
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:269
void EmitInlineFunctionEnd(CGBuilderTy &Builder)
End an inlined function scope.
Represents a struct/union/class.
Definition: Decl.h:3602
const TemplateArgumentList & getTemplateArgs() const
Retrieve the template arguments of the class template specialization.
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:297
Represents a class template specialization, which refers to a class template with a given set of temp...
One of these records is kept for each identifier that is lexed.
std::map< std::string, std::string > DebugPrefixMap
void print(raw_ostream &OS, const PrintingPolicy &Policy, bool SuppressNNS=false) const
Print the template name.
Represents a class type in Objective C.
Definition: Type.h:5542
void removeRestrict()
Definition: Type.h:270
QualType getPointeeType() const
Definition: Type.h:2658
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
Expr * getAsExpr() const
Retrieve the template argument as an expression.
Definition: TemplateBase.h:330
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:154
bool isInline() const
Returns true if this is an inline namespace declaration.
Definition: Decl.h:575
The template argument is an integral value stored in an llvm::APSInt that was provided for an integra...
Definition: TemplateBase.h:72
static bool isFunctionLocalClass(const CXXRecordDecl *RD)
isFunctionLocalClass - Return true if CXXRecordDecl is defined inside a function. ...
TemplateDecl * getAsTemplateDecl() const
Retrieve the underlying template declaration that this template name refers to, if known...
RecordDecl * getDefinition() const
Returns the RecordDecl that actually defines this struct/union/class.
Definition: Decl.h:3783
void EmitImportDecl(const ImportDecl &ID)
Emit an declaration.
field_range fields() const
Definition: Decl.h:3793
Represents a member of a struct/union/class.
Definition: Decl.h:2588
TemplateName getTemplateName() const
Retrieve the name of the template that we are specializing.
Definition: Type.h:4908
void removeConst()
Definition: Type.h:260
CXXMethodDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:2127
prop_range properties() const
Definition: DeclObjC.h:980
void completeClassData(const RecordDecl *RD)
static CharUnits Zero()
Zero - Construct a CharUnits quantity of zero.
Definition: CharUnits.h:53
llvm::DIMacro * CreateMacro(llvm::DIMacroFile *Parent, unsigned MType, SourceLocation LineLoc, StringRef Name, StringRef Value)
Create debug info for a macro defined by a #define directive or a macro undefined by a #undef directi...
method_iterator method_begin() const
Method begin iterator.
Definition: DeclCXX.h:871
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:50
bool isFloat() const
Definition: APValue.h:235
Describes a module or submodule.
Definition: Module.h:65
QualType getParamTypeForDecl() const
Definition: TemplateBase.h:269
Qualifiers getLocalQualifiers() const
Retrieve the set of qualifiers local to this particular QualType instance, not including any qualifie...
Definition: Type.h:6095
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:2263
Provides information about a function template specialization, which is a FunctionDecl that has been ...
Definition: DeclTemplate.h:508
bool isGLValue() const
Definition: Expr.h:252
Represents a C++ using-declaration.
Definition: DeclCXX.h:3352
Type(TypeClass tc, QualType canon, bool Dependent, bool InstantiationDependent, bool VariablyModified, bool ContainsUnexpandedParameterPack)
Definition: Type.h:1774
const TemplateArgumentList * TemplateArguments
The template arguments used to produce the function template specialization from the function templat...
Definition: DeclTemplate.h:540
static SmallString< 64 > constructSetterName(StringRef Name)
Return the default setter name for the given identifier.
ArrayRef< VTableComponent > vtable_components() const
unsigned Size
The total size of the bit-field, in bits.
An rvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2742
QualType getThisType(ASTContext &C) const
Returns the type of the this pointer.
Definition: DeclCXX.cpp:2184
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:2666
DeclContext * getEnclosingNamespaceContext()
Retrieve the nearest enclosing namespace context.
Definition: DeclBase.cpp:1740
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:82
RefQualifierKind getRefQualifier() const
Retrieve the ref-qualifier associated with this method.
Definition: DeclCXX.h:2203
An lvalue ref-qualifier was provided (&).
Definition: Type.h:1367
~ApplyInlineDebugLocation()
Restore everything back to the original state.
CharUnits - This is an opaque type for sizes expressed in character units.
Definition: CharUnits.h:38
bool capturesThis() const
Determine whether this capture handles the C++ this pointer.
Definition: LambdaCapture.h:83
APValue Val
Val - This is the value the expression can be folded to.
Definition: Expr.h:573
const BlockDecl * getBlockDecl() const
Definition: CGBlocks.h:281
Emit location information but do not generate debug info in the output.
bool hasPrototype() const
Whether this function has a prototype, either because one was explicitly written or because it was "i...
Definition: Decl.h:2068
CharUnits StorageOffset
The offset of the bitfield storage from the start of the struct.
QualType getNullPtrType() const
Retrieve the type for null non-type template argument.
Definition: TemplateBase.h:275
bool isTypeAlias() const
Determine if this template specialization type is for a type alias template that has been substituted...
Definition: Type.h:4893
void EmitGlobalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl)
Emit information about a global variable.
Deleting dtor.
Definition: ABI.h:35
bool isByRef() const
Whether this is a "by ref" capture, i.e.
Definition: Decl.h:3898
Represents a declaration of a type.
Definition: Decl.h:2883
static bool hasCXXMangling(const TagDecl *TD, llvm::DICompileUnit *TheCU)
Module * Parent
The parent of this module.
Definition: Module.h:91
const Type * getClass() const
Definition: Type.h:2794
FunctionTemplateSpecializationInfo * getTemplateSpecializationInfo() const
If this function is actually a function template specialization, retrieve information about this func...
Definition: Decl.cpp:3483
bool isLambda() const
Determine whether this class describes a lambda function object.
Definition: DeclCXX.h:1196
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R)
Returns the common set of qualifiers while removing them from the given sets.
Definition: Type.h:192
llvm::DIType * getOrCreateInterfaceType(QualType Ty, SourceLocation Loc)
Emit an Objective-C interface type standalone debug info.
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6076
unsigned Align
Definition: ASTContext.h:144
field_iterator field_begin() const
Definition: Decl.cpp:4159
bool AlignIsRequired
Definition: ASTContext.h:145
bool isInt() const
Definition: APValue.h:234
bool isCompleteDefinitionRequired() const
Return true if this complete decl is required to be complete for some existing use.
Definition: Decl.h:3187
unsigned Offset
The offset within a contiguous run of bitfields that are represented as a single "field" within the L...
static uint32_t getDeclAlignIfRequired(const Decl *D, const ASTContext &Ctx)
Definition: CGDebugInfo.cpp:61
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:821
void EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn)
Constructs the debug code for exiting a function.
llvm::DIImportedEntity * EmitNamespaceAlias(const NamespaceAliasDecl &NA)
Emit C++ namespace alias.
bool isInstance() const
Definition: DeclCXX.h:2069
void * getAsOpaquePtr() const
Definition: Type.h:683
FunctionDecl * getInstantiatedFromMemberFunction() const
If this function is an instantiation of a member function of a class template specialization, retrieves the function from which it was instantiated.
Definition: Decl.cpp:3346
Represents an ObjC class declaration.
Definition: DeclObjC.h:1164
shadow_iterator shadow_begin() const
Definition: DeclCXX.h:3456
void removeVolatile()
Definition: Type.h:265
bool hasConst() const
Definition: Type.h:258
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:870
bool isAnonymousStructOrUnion() const
Whether this is an anonymous struct or union.
Definition: Decl.h:3675
Module * getImportedModule() const
Retrieve the module that was imported by the import declaration.
Definition: Decl.h:4202
bool NeedsCopyDispose
True if the block has captures that would necessitate custom copy or dispose helper functions if the ...
Definition: CGBlocks.h:223
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2751
NodeId Parent
Definition: ASTDiff.cpp:192
QualType getBlockDescriptorExtendedType() const
Gets the struct used to keep track of the extended descriptor for pointer to blocks.
static unsigned getDwarfCC(CallingConv CC)
bool hasAttr() const
Definition: DeclBase.h:531
QualType getBaseType() const
Gets the base type of this object type.
Definition: Type.h:5605
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3691
bool isDynamicClass() const
Definition: DeclCXX.h:789
unsigned MSVCFormatting
Use whitespace and punctuation like MSVC does.
CGBlockInfo - Information to generate a block literal.
Definition: CGBlocks.h:153
TemplateSpecializationKind getTemplateSpecializationKind() const
Determine whether this particular class is a specialization or instantiation of a class template or m...
Definition: DeclCXX.cpp:1627
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
QuantityType getQuantity() const
getQuantity - Get the raw integer representation of this quantity.
Definition: CharUnits.h:179
ObjCTypeParamDecl * getDecl() const
Definition: Type.h:5511
void setDwoId(uint64_t Signature)
Module debugging: Support for building PCMs.
ValueDecl * getAsDecl() const
Retrieve the declaration for a declaration non-type template argument.
Definition: TemplateBase.h:264
unsigned Offset
Definition: Format.cpp:1631
ASTRecordLayout - This class contains layout information for one RecordDecl, which is a struct/union/...
Definition: RecordLayout.h:39
capture_const_iterator captures_end() const
Definition: DeclCXX.h:1256
llvm::DILocalVariable * EmitDeclareOfAutoVariable(const VarDecl *Decl, llvm::Value *AI, CGBuilderTy &Builder)
Emit call to llvm.dbg.declare for an automatic variable declaration.
bool isValid() const
void EmitLocation(CGBuilderTy &Builder, SourceLocation Loc)
Emit metadata to indicate a change in line/column information in the source file. ...
TemplateParameterList * getTemplateParameters() const
Get the list of template parameters.
Definition: DeclTemplate.h:432
ApplyInlineDebugLocation(CodeGenFunction &CGF, GlobalDecl InlinedFn)
Set up the CodeGenFunction&#39;s DebugInfo to produce inline locations for the function InlinedFn...
Pepresents a block literal declaration, which is like an unnamed FunctionDecl.
Definition: Decl.h:3867
Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...
Definition: Decl.h:636
This represents one expression.
Definition: Expr.h:106
QualType getPointeeType() const
Definition: Type.h:2698
SourceLocation End
known_extensions_range known_extensions() const
Definition: DeclObjC.h:1753
Emit only debug info necessary for generating line number tables (-gline-tables-only).
bool isPositive() const
isPositive - Test whether the quantity is greater than zero.
Definition: CharUnits.h:122
bool isVariadic() const
Whether this function is variadic.
Definition: Decl.cpp:2689
bool isInvalid() const
Return true if this object is invalid or uninitialized.
void EmitInlineFunctionStart(CGBuilderTy &Builder, GlobalDecl GD)
Start a new scope for an inlined function.
const FileEntry * getFileEntryForID(FileID FID) const
Returns the FileEntry record for the provided FileID.
const AnnotatedLine * Line
const CXXRecordDecl * getPointeeCXXRecordDecl() const
If this is a pointer or reference to a RecordType, return the CXXRecordDecl that the type refers to...
Definition: Type.cpp:1598
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6797
The template argument is a null pointer or null pointer to member that was provided for a non-type te...
Definition: TemplateBase.h:68
unsigned getLine() const
Return the presumed line number of this location.
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2706
Defines version macros and version-related utility functions for Clang.
bool isAnonymousNamespace() const
Returns true if this is an anonymous namespace declaration.
Definition: Decl.h:570
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:547
const TemplateArgumentList * getTemplateSpecializationArgs() const
Retrieve the template arguments used to produce this function template specialization from the primar...
Definition: Decl.cpp:3489
llvm::DIMacroFile * CreateTempMacroFile(llvm::DIMacroFile *Parent, SourceLocation LineLoc, SourceLocation FileLoc)
Create debug info for a file referenced by an #include directive.
field_iterator field_end() const
Definition: Decl.h:3796
ClassTemplateDecl * getSpecializedTemplate() const
Retrieve the template that this specialization specializes.
StringRef getNameForSlot(unsigned argIndex) const
Retrieve the name at a given position in the selector.
DeclContext * getDeclContext()
Definition: DeclBase.h:427
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:338
const CXXRecordDecl * getPrimaryBase() const
getPrimaryBase - Get the primary base for this record.
Definition: RecordLayout.h:218
static CharUnits fromQuantity(QuantityType Quantity)
fromQuantity - Construct a CharUnits quantity from a raw integer type.
Definition: CharUnits.h:63
ArrayRef< TemplateArgument > asArray() const
Produce this as an array ref.
Definition: DeclTemplate.h:264
void completeUnusedClass(const CXXRecordDecl &D)
EnumDecl * getDefinition() const
Definition: Decl.h:3436
void printTemplateArgumentList(raw_ostream &OS, ArrayRef< TemplateArgument > Args, const PrintingPolicy &Policy)
Print a template argument list, including the &#39;<&#39; and &#39;>&#39; enclosing the template arguments.
bool isSignedIntegerType() const
Return true if this is an integer type that is signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], or an enum decl which has a signed representation.
Definition: Type.cpp:1844
QualType getType() const
Definition: Expr.h:128
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:199
bool hasExtendableVFPtr() const
hasVFPtr - Does this class have a virtual function table pointer that can be extended by a derived cl...
Definition: RecordLayout.h:268
unsigned getMaxAlignment() const
getMaxAlignment - return the maximum alignment specified by attributes on this decl, 0 if there are none.
Definition: DeclBase.cpp:384
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1752
method_iterator method_end() const
Method past-the-end iterator.
Definition: DeclCXX.h:876
Represents an unpacked "presumed" location which can be presented to the user.
bool isInstanceMethod() const
Definition: DeclObjC.h:414
QualType getBlockDescriptorType() const
Gets the struct used to keep track of the descriptor for pointer to blocks.
Represents a GCC generic vector type.
Definition: Type.h:3172
SourceLocation getCaretLocation() const
Definition: Decl.h:3940
An lvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2724
APValue * evaluateValue() const
Attempt to evaluate the value of the initializer attached to this declaration, and produce notes expl...
Definition: Decl.cpp:2258
Selector getSelector() const
Definition: DeclObjC.h:321
void printQualifiedName(raw_ostream &OS) const
Returns a human-readable qualified name for this declaration, like A::B::i, for i being member of nam...
Definition: Decl.cpp:1527
bool isUnionType() const
Definition: Type.cpp:475
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:703
ImplicitParamDecl * getSelfDecl() const
Definition: DeclObjC.h:406
static json::Object createFile(const FileEntry &FE)
const SourceManager & SM
Definition: Format.cpp:1490
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:236
VarDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.cpp:2026
GlobalDecl - represents a global declaration.
Definition: GlobalDecl.h:35
bool isObjCOneArgSelector() const
The l-value was considered opaque, so the alignment was determined from a type.
RecordDecl * getDecl() const
Definition: Type.h:4384
const char * getFilename() const
Return the presumed filename of this location.
void EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI, unsigned ArgNo, CGBuilderTy &Builder)
Emit call to llvm.dbg.declare for an argument variable declaration.
bool capturesVariable() const
Determine whether this capture handles a variable.
Definition: LambdaCapture.h:89
Pass it as a pointer to temporary memory.
Definition: CGCXXABI.h:137
uint64_t getFieldOffset(unsigned FieldNo) const
getFieldOffset - Get the offset of the given field index, in bits.
Definition: RecordLayout.h:191
virtual void printName(raw_ostream &os) const
Definition: Decl.cpp:1516
unsigned size_overridden_methods() const
Definition: DeclCXX.cpp:2164
void EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc, QualType FnType)
Emit debug info for a function declaration.
static llvm::DINode::DIFlags getAccessFlag(AccessSpecifier Access, const RecordDecl *RD)
Convert an AccessSpecifier into the corresponding DINode flag.
std::string getAsString() const
Derive the full selector name (e.g.
llvm::MemoryBuffer * getBuffer(FileID FID, SourceLocation Loc, bool *Invalid=nullptr) const
Return the buffer for the specified FileID.
virtual void mangleCXXRTTIName(QualType T, raw_ostream &)=0
ExtProtoInfo getExtProtoInfo() const
Definition: Type.h:3903
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: Redeclarable.h:295
unsigned getColumn() const
Return the presumed column number of this location.
Encodes a location in the source.
ObjCInterfaceDecl * getDecl() const
Get the declaration of this interface.
Definition: Type.h:5755
QualType getReturnType() const
Definition: Type.h:3617
bool isPure() const
Whether this virtual function is pure, i.e.
Definition: Decl.h:2010
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of enums...
Definition: Type.h:4400
Interfaces are the core concept in Objective-C for object oriented design.
Definition: Type.h:5742
llvm::StructType * StructureType
Definition: CGBlocks.h:246
void completeRequiredType(const RecordDecl *RD)
std::string getNameAsString() const
Get a human-readable name for the declaration, even if it is one of the special kinds of names (C++ c...
Definition: Decl.h:291
Limit generated debug info to reduce size (-fno-standalone-debug).
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3073
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
QualType getElementType() const
Definition: Type.h:3207
const Decl * getDecl() const
Definition: GlobalDecl.h:69
static QualType getUnderlyingType(const SubRegion *R)
Cached information about one file (either on disk or in the virtual file system). ...
Definition: FileManager.h:60
APFloat & getFloat()
Definition: APValue.h:260
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2041
TypedefNameDecl * getTypedefNameForUnnamedTagDecl(const TagDecl *TD)
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2272
unsigned RemapFilePaths
Whether to apply -fdebug-prefix-map to any file paths.
llvm::Constant * emitAbstract(const Expr *E, QualType T)
Emit the result of the given expression as an abstract constant, asserting that it succeeded...
Capture(VarDecl *variable, bool byRef, bool nested, Expr *copy)
Definition: Decl.h:3888
bool hasRestrict() const
Definition: Type.h:268
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:721
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:695
const BlockExpr * getBlockExpr() const
Definition: CGBlocks.h:282
TypeClass getTypeClass() const
Definition: Type.h:1815
MangleContext & getMangleContext()
Gets the mangle context.
Definition: CGCXXABI.h:97
This template specialization was formed from a template-id but has not yet been declared, defined, or instantiated.
Definition: Specifiers.h:149
constexpr XRayInstrMask None
Definition: XRayInstr.h:38
bool operator<(DeclarationName LHS, DeclarationName RHS)
Ordering on two declaration names.
VarDecl * getVariable() const
The variable being captured.
Definition: Decl.h:3894
llvm::APSInt getAsIntegral() const
Retrieve the template argument as an integral value.
Definition: TemplateBase.h:301
EnumDecl * getDecl() const
Definition: Type.h:4407
unsigned CXXThisIndex
The field index of &#39;this&#39; within the block, if there is one.
Definition: CGBlocks.h:159
An rvalue ref-qualifier was provided (&&).
Definition: Type.h:1370
void removeObjCGCAttr()
Definition: Type.h:309
ObjCImplementationDecl * getImplementation() const
Definition: DeclObjC.cpp:1549
static bool hasExplicitMemberDefinition(CXXRecordDecl::method_iterator I, CXXRecordDecl::method_iterator End)
llvm::DebugLoc SourceLocToDebugLoc(SourceLocation Loc)
Describes a module import declaration, which makes the contents of the named module visible in the cu...
Definition: Decl.h:4158
SourceLocation getExprLoc() const LLVM_READONLY
getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic exp...
Definition: Expr.cpp:215
StringRef getName() const
Return the actual identifier string.
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2925
CXXRecordDecl * getMostRecentCXXRecordDecl() const
Definition: Type.cpp:4013
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
Represents a template argument.
Definition: TemplateBase.h:51
void completeClass(const RecordDecl *RD)
This class organizes the cross-function state that is used while generating LLVM code.
NamespaceDecl * getNominatedNamespace()
Returns the namespace nominated by this using-directive.
Definition: DeclCXX.cpp:2566
Dataflow Directional Tag Classes.
virtual void getNameForDiagnostic(raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const
Appends a human-readable name for this declaration into the given stream.
Definition: Decl.cpp:1620
bool isValid() const
Return true if this is a valid SourceLocation object.
A qualifier set is used to build a set of qualifiers.
Definition: Type.h:6043
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
EvalResult is a struct with detailed info about an evaluated expression.
Definition: Expr.h:571
uint64_t Index
Method&#39;s index in the vftable.
ArrayRef< Capture > captures() const
Definition: Decl.h:3994
static SmallString< 256 > getTypeIdentifier(const TagType *Ty, CodeGenModule &CGM, llvm::DICompileUnit *TheCU)
The template argument is a pack expansion of a template name that was provided for a template templat...
Definition: TemplateBase.h:80
bool isRecord() const
Definition: DeclBase.h:1827
Parameter for Objective-C &#39;self&#39; argument.
Definition: Decl.h:1496
QualType getUnderlyingType() const
Definition: Decl.h:2980
llvm::iterator_range< base_class_const_iterator > base_class_const_range
Definition: DeclCXX.h:821
const Expr * getInit() const
Definition: Decl.h:1219
AccessSpecifier getAccess() const
Definition: DeclBase.h:462
ObjCInterfaceDecl * getDefinition()
Retrieve the definition of this class, or NULL if this class has been forward-declared (with @class) ...
Definition: DeclObjC.h:1541
FileID getMainFileID() const
Returns the FileID of the main source file.
bool hasLocalQualifiers() const
Determine whether this particular QualType instance has any qualifiers, without looking through any t...
Definition: Type.h:740
Emit only debug directives with the line numbers data.
This template specialization was instantiated from a template due to an explicit instantiation declar...
Definition: Specifiers.h:160
const CXXRecordDecl * getParent() const
Returns the parent of this method declaration, which is the class in which this method is defined...
Definition: DeclCXX.h:2166
const Type * strip(QualType type)
Collect any qualifiers on the given type and return an unqualified type.
Definition: Type.h:6050
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:999
unsigned shadow_size() const
Return the number of shadowed declarations associated with this using declaration.
Definition: DeclCXX.h:3464
CGDebugInfo(CodeGenModule &CGM)
Definition: CGDebugInfo.cpp:65
Represents an enum.
Definition: Decl.h:3335
unsigned StorageSize
The storage size in bits which should be used when accessing this bitfield.
PresumedLoc getPresumedLoc(SourceLocation Loc, bool UseLineDirectives=true) const
Returns the "presumed" location of a SourceLocation specifies.
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2760
TemplateSpecializationKind
Describes the kind of template specialization that a particular template specialization declaration r...
Definition: Specifiers.h:146
QualType apply(const ASTContext &Context, QualType QT) const
Apply the collected qualifiers to the given type.
Definition: Type.cpp:3369
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1082
specific_decl_iterator - Iterates over a subrange of declarations stored in a DeclContext, providing only those that are of type SpecificDecl (or a class derived from it).
Definition: DeclBase.h:2017
Represents a pointer to an Objective C object.
Definition: Type.h:5798
Pointer to a block type.
Definition: Type.h:2643
FileID getFileID(SourceLocation SpellingLoc) const
Return the FileID for a SourceLocation.
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2544
bool isIncompleteArrayType() const
Definition: Type.h:6357
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4374
Complex values, per C99 6.2.5p11.
Definition: Type.h:2481
Don&#39;t generate debug info.
void EmitFunctionStart(GlobalDecl GD, SourceLocation Loc, SourceLocation ScopeLoc, QualType FnType, llvm::Function *Fn, bool CurFnIsThunk, CGBuilderTy &Builder)
Emit a call to llvm.dbg.function.start to indicate start of a new function.
bool empty() const
Definition: Type.h:414
llvm::DIType * getOrCreateStandaloneType(QualType Ty, SourceLocation Loc)
Emit standalone debug info for a type.
std::string remapDIPath(StringRef) const
Remap a given path with the current debug prefix map.
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:707
void completeType(const EnumDecl *ED)
DeclaratorDecl * getDeclaratorForUnnamedTagDecl(const TagDecl *TD)
The template argument is a type.
Definition: TemplateBase.h:60
The template argument is actually a parameter pack.
Definition: TemplateBase.h:91
APValue - This class implements a discriminated union of [uninitialized] [APSInt] [APFloat]...
Definition: APValue.h:38
uint64_t getTypeSize(QualType T) const
Return the size of the specified (complete) type T, in bits.
Definition: ASTContext.h:2069
bool isIncompleteType(NamedDecl **Def=nullptr) const
Types are partitioned into 3 broad categories (C99 6.2.5p1): object types, function types...
Definition: Type.cpp:2031
The type-property cache.
Definition: Type.cpp:3448
bool capturesCXXThis() const
Definition: Decl.h:3999
std::function< std::string(StringRef)> remapPath
When RemapFilePaths is true, this function performs the action.
A template argument list.
Definition: DeclTemplate.h:210
TypedefNameDecl * getDecl() const
Definition: Type.h:4171
void EmitUsingDecl(const UsingDecl &UD)
Emit C++ using declaration.
void EmitUsingDirective(const UsingDirectiveDecl &UD)
Emit C++ using directive.
void EmitLexicalBlockStart(CGBuilderTy &Builder, SourceLocation Loc)
Emit metadata to indicate the beginning of a new lexical block and push the block onto the stack...
ArgKind getKind() const
Return the kind of stored template argument.
Definition: TemplateBase.h:235
Represents a type parameter type in Objective C.
Definition: Type.h:5468
CallingConv getCallConv() const
Definition: Type.h:3627
QualType getAliasedType() const
Get the aliased type, if this is a specialization of a type alias template.
Definition: Type.h:4897
TypedefNameDecl * getTypedefNameForAnonDecl() const
Definition: Decl.h:3283
Represents a C++ struct/union/class.
Definition: DeclCXX.h:300
ArrayRef< TemplateArgument > template_arguments() const
Definition: Type.h:4924
TypeInfo getTypeInfo(const Type *T) const
Get the size and alignment of the specified complete type in bits.
The template argument is a template name that was provided for a template template parameter...
Definition: TemplateBase.h:76
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1937
QualType getPointerType(QualType T) const
Return the uniqued reference to the type for a pointer to the specified type.
void EmitDeclareOfBlockDeclRefVariable(const VarDecl *variable, llvm::Value *storage, CGBuilderTy &Builder, const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint=nullptr)
Emit call to llvm.dbg.declare for an imported variable declaration in a block.
This class is used for builtin types like &#39;int&#39;.
Definition: Type.h:2395
void EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block, StringRef Name, unsigned ArgNo, llvm::AllocaInst *LocalAddr, CGBuilderTy &Builder)
Emit call to llvm.dbg.declare for the block-literal argument to a block invocation function...
SourceLocation getLocation() const
Retrieve the source location of the capture.
bool isComplexIntegerType() const
Definition: Type.cpp:487
QualType getIntegerType() const
Return the integer type this enum decl corresponds to.
Definition: Decl.h:3489
StringRef getName() const
Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:275
bool hasVolatile() const
Definition: Type.h:263
void setLocation(SourceLocation Loc)
Update the current source location.
CGCXXABI & getCXXABI() const
uint64_t Width
Definition: ASTContext.h:143
std::string getQualifiedNameAsString() const
Definition: Decl.cpp:1520
CanQualType IntTy
Definition: ASTContext.h:1024
Abstracts clang modules and precompiled header files and holds everything needed to generate debug in...
unsigned getNumElements() const
Definition: Type.h:3208
QualType getAsType() const
Retrieve the type for a type template argument.
Definition: TemplateBase.h:257
bool isUnion() const
Definition: Decl.h:3261
Represents a type template specialization; the template must be a class template, a type alias templa...
Definition: Type.h:4845
const internal::VariadicDynCastAllOfMatcher< Decl, BlockDecl > blockDecl
Matches block declarations.
static bool isClassOrMethodDLLImport(const CXXRecordDecl *RD)
Return true if the class or any of its methods are marked dllimport.
TemplatedKind getTemplatedKind() const
What kind of templated function this is.
Definition: Decl.cpp:3330
capture_const_iterator captures_begin() const
Definition: DeclCXX.h:1252
bool isStaticDataMember() const
Determines whether this is a static data member.
Definition: Decl.h:1134
QualType getType() const
Definition: Decl.h:647
static InputKind getInputKindForExtension(StringRef Extension)
getInputKindForExtension - Return the appropriate input kind for a file extension.
A wrapper class around a pointer that always points to its canonical declaration. ...
Definition: Redeclarable.h:348
FunctionDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.cpp:2983
ObjCIvarDecl * all_declared_ivar_begin()
all_declared_ivar_begin - return first ivar declared in this class, its extensions and its implementa...
Definition: DeclObjC.cpp:1592
Represents a C++ namespace alias.
Definition: DeclCXX.h:3020
TemplateName getAsTemplate() const
Retrieve the template name for a template name argument.
Definition: TemplateBase.h:281
APSInt & getInt()
Definition: APValue.h:252
static bool isDefinedInClangModule(const RecordDecl *RD)
Does a type definition exist in an imported clang module?
Represents C++ using-directive.
Definition: DeclCXX.h:2916
void removeAddressSpace()
Definition: Type.h:377
bool isObjCZeroArgSelector() const
base_class_range vbases()
Definition: DeclCXX.h:840
This class handles loading and caching of source files into memory.
SourceLocation getLocation() const
Definition: DeclBase.h:418
QualType getPointeeType() const
Definition: Type.h:2780
Represents a shadow declaration introduced into a scope by a (resolved) using declaration.
Definition: DeclCXX.h:3139
bool isExternallyVisible() const
Definition: Decl.h:379
Structure with information about how a bitfield should be accessed.
NamedDecl * getAliasedNamespace() const
Retrieve the namespace that this alias refers to, which may either be a NamespaceDecl or a NamespaceA...
Definition: DeclCXX.h:3116
QualType getPointeeType() const
Gets the type pointed to by this ObjC pointer.
Definition: Type.h:5814
method_range methods() const
Definition: DeclCXX.h:865