clang  7.0.0svn
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"
30 #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/Module.h"
45 #include "llvm/Support/FileSystem.h"
46 #include "llvm/Support/MD5.h"
47 #include "llvm/Support/Path.h"
48 using namespace clang;
49 using namespace clang::CodeGen;
50 
51 static uint32_t getTypeAlignIfRequired(const Type *Ty, const ASTContext &Ctx) {
52  auto TI = Ctx.getTypeInfo(Ty);
53  return TI.AlignIsRequired ? TI.Align : 0;
54 }
55 
56 static uint32_t getTypeAlignIfRequired(QualType Ty, const ASTContext &Ctx) {
57  return getTypeAlignIfRequired(Ty.getTypePtr(), Ctx);
58 }
59 
60 static uint32_t getDeclAlignIfRequired(const Decl *D, const ASTContext &Ctx) {
61  return D->hasAttr<AlignedAttr>() ? D->getMaxAlignment() : 0;
62 }
63 
65  : CGM(CGM), DebugKind(CGM.getCodeGenOpts().getDebugInfo()),
66  DebugTypeExtRefs(CGM.getCodeGenOpts().DebugTypeExtRefs),
67  DBuilder(CGM.getModule()) {
68  for (const auto &KV : CGM.getCodeGenOpts().DebugPrefixMap)
69  DebugPrefixMap[KV.first] = KV.second;
70  CreateCompileUnit();
71 }
72 
74  assert(LexicalBlockStack.empty() &&
75  "Region stack mismatch, stack not empty!");
76 }
77 
78 ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF,
79  SourceLocation TemporaryLocation)
80  : CGF(&CGF) {
81  init(TemporaryLocation);
82 }
83 
84 ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF,
85  bool DefaultToEmpty,
86  SourceLocation TemporaryLocation)
87  : CGF(&CGF) {
88  init(TemporaryLocation, DefaultToEmpty);
89 }
90 
91 void ApplyDebugLocation::init(SourceLocation TemporaryLocation,
92  bool DefaultToEmpty) {
93  auto *DI = CGF->getDebugInfo();
94  if (!DI) {
95  CGF = nullptr;
96  return;
97  }
98 
99  OriginalLocation = CGF->Builder.getCurrentDebugLocation();
100 
101  if (OriginalLocation && !DI->CGM.getExpressionLocationsEnabled())
102  return;
103 
104  if (TemporaryLocation.isValid()) {
105  DI->EmitLocation(CGF->Builder, TemporaryLocation);
106  return;
107  }
108 
109  if (DefaultToEmpty) {
110  CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc());
111  return;
112  }
113 
114  // Construct a location that has a valid scope, but no line info.
115  assert(!DI->LexicalBlockStack.empty());
116  CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(
117  0, 0, DI->LexicalBlockStack.back(), DI->getInlinedAt()));
118 }
119 
120 ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E)
121  : CGF(&CGF) {
122  init(E->getExprLoc());
123 }
124 
125 ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc)
126  : CGF(&CGF) {
127  if (!CGF.getDebugInfo()) {
128  this->CGF = nullptr;
129  return;
130  }
131  OriginalLocation = CGF.Builder.getCurrentDebugLocation();
132  if (Loc)
133  CGF.Builder.SetCurrentDebugLocation(std::move(Loc));
134 }
135 
137  // Query CGF so the location isn't overwritten when location updates are
138  // temporarily disabled (for C++ default function arguments)
139  if (CGF)
140  CGF->Builder.SetCurrentDebugLocation(std::move(OriginalLocation));
141 }
142 
144  GlobalDecl InlinedFn)
145  : CGF(&CGF) {
146  if (!CGF.getDebugInfo()) {
147  this->CGF = nullptr;
148  return;
149  }
150  auto &DI = *CGF.getDebugInfo();
151  SavedLocation = DI.getLocation();
152  assert((DI.getInlinedAt() ==
153  CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) &&
154  "CGDebugInfo and IRBuilder are out of sync");
155 
156  DI.EmitInlineFunctionStart(CGF.Builder, InlinedFn);
157 }
158 
160  if (!CGF)
161  return;
162  auto &DI = *CGF->getDebugInfo();
164  DI.EmitLocation(CGF->Builder, SavedLocation);
165 }
166 
168  // If the new location isn't valid return.
169  if (Loc.isInvalid())
170  return;
171 
172  CurLoc = CGM.getContext().getSourceManager().getExpansionLoc(Loc);
173 
174  // If we've changed files in the middle of a lexical scope go ahead
175  // and create a new lexical scope with file node if it's different
176  // from the one in the scope.
177  if (LexicalBlockStack.empty())
178  return;
179 
180  SourceManager &SM = CGM.getContext().getSourceManager();
181  auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
182  PresumedLoc PCLoc = SM.getPresumedLoc(CurLoc);
183 
184  if (PCLoc.isInvalid() || Scope->getFilename() == PCLoc.getFilename())
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  getOrCreateMainFile());
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  return PP;
238 }
239 
240 StringRef CGDebugInfo::getFunctionName(const FunctionDecl *FD) {
241  assert(FD && "Invalid FunctionDecl!");
242  IdentifierInfo *FII = FD->getIdentifier();
245 
246  // Emit the unqualified name in normal operation. LLVM and the debugger can
247  // compute the fully qualified name from the scope chain. If we're only
248  // emitting line table info, there won't be any scope chains, so emit the
249  // fully qualified name here so that stack traces are more accurate.
250  // FIXME: Do this when emitting DWARF as well as when emitting CodeView after
251  // evaluating the size impact.
252  bool UseQualifiedName = DebugKind == codegenoptions::DebugLineTablesOnly &&
253  CGM.getCodeGenOpts().EmitCodeView;
254 
255  if (!Info && FII && !UseQualifiedName)
256  return FII->getName();
257 
258  SmallString<128> NS;
259  llvm::raw_svector_ostream OS(NS);
260  if (!UseQualifiedName)
261  FD->printName(OS);
262  else
263  FD->printQualifiedName(OS, getPrintingPolicy());
264 
265  // Add any template specialization args.
266  if (Info) {
267  const TemplateArgumentList *TArgs = Info->TemplateArguments;
268  printTemplateArgumentList(OS, TArgs->asArray(), getPrintingPolicy());
269  }
270 
271  // Copy this name on the side and use its reference.
272  return internString(OS.str());
273 }
274 
275 StringRef CGDebugInfo::getObjCMethodName(const ObjCMethodDecl *OMD) {
276  SmallString<256> MethodName;
277  llvm::raw_svector_ostream OS(MethodName);
278  OS << (OMD->isInstanceMethod() ? '-' : '+') << '[';
279  const DeclContext *DC = OMD->getDeclContext();
280  if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) {
281  OS << OID->getName();
282  } else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) {
283  OS << OID->getName();
284  } else if (const auto *OC = dyn_cast<ObjCCategoryDecl>(DC)) {
285  if (OC->IsClassExtension()) {
286  OS << OC->getClassInterface()->getName();
287  } else {
288  OS << OC->getIdentifier()->getNameStart() << '('
289  << OC->getIdentifier()->getNameStart() << ')';
290  }
291  } else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) {
292  OS << OCD->getClassInterface()->getName() << '('
293  << OCD->getName() << ')';
294  } else if (isa<ObjCProtocolDecl>(DC)) {
295  // We can extract the type of the class from the self pointer.
296  if (ImplicitParamDecl *SelfDecl = OMD->getSelfDecl()) {
297  QualType ClassTy =
298  cast<ObjCObjectPointerType>(SelfDecl->getType())->getPointeeType();
299  ClassTy.print(OS, PrintingPolicy(LangOptions()));
300  }
301  }
302  OS << ' ' << OMD->getSelector().getAsString() << ']';
303 
304  return internString(OS.str());
305 }
306 
307 StringRef CGDebugInfo::getSelectorName(Selector S) {
308  return internString(S.getAsString());
309 }
310 
311 StringRef CGDebugInfo::getClassName(const RecordDecl *RD) {
312  if (isa<ClassTemplateSpecializationDecl>(RD)) {
313  SmallString<128> Name;
314  llvm::raw_svector_ostream OS(Name);
315  RD->getNameForDiagnostic(OS, getPrintingPolicy(),
316  /*Qualified*/ false);
317 
318  // Copy this name on the side and use its reference.
319  return internString(Name);
320  }
321 
322  // quick optimization to avoid having to intern strings that are already
323  // stored reliably elsewhere
324  if (const IdentifierInfo *II = RD->getIdentifier())
325  return II->getName();
326 
327  // The CodeView printer in LLVM wants to see the names of unnamed types: it is
328  // used to reconstruct the fully qualified type names.
329  if (CGM.getCodeGenOpts().EmitCodeView) {
330  if (const TypedefNameDecl *D = RD->getTypedefNameForAnonDecl()) {
331  assert(RD->getDeclContext() == D->getDeclContext() &&
332  "Typedef should not be in another decl context!");
333  assert(D->getDeclName().getAsIdentifierInfo() &&
334  "Typedef was not named!");
335  return D->getDeclName().getAsIdentifierInfo()->getName();
336  }
337 
338  if (CGM.getLangOpts().CPlusPlus) {
339  StringRef Name;
340 
341  ASTContext &Context = CGM.getContext();
342  if (const DeclaratorDecl *DD = Context.getDeclaratorForUnnamedTagDecl(RD))
343  // Anonymous types without a name for linkage purposes have their
344  // declarator mangled in if they have one.
345  Name = DD->getName();
346  else if (const TypedefNameDecl *TND =
348  // Anonymous types without a name for linkage purposes have their
349  // associate typedef mangled in if they have one.
350  Name = TND->getName();
351 
352  if (!Name.empty()) {
353  SmallString<256> UnnamedType("<unnamed-type-");
354  UnnamedType += Name;
355  UnnamedType += '>';
356  return internString(UnnamedType);
357  }
358  }
359  }
360 
361  return StringRef();
362 }
363 
365 CGDebugInfo::computeChecksum(FileID FID, SmallString<32> &Checksum) const {
366  Checksum.clear();
367 
368  if (!CGM.getCodeGenOpts().EmitCodeView &&
369  CGM.getCodeGenOpts().DwarfVersion < 5)
370  return None;
371 
372  SourceManager &SM = CGM.getContext().getSourceManager();
373  bool Invalid;
374  llvm::MemoryBuffer *MemBuffer = SM.getBuffer(FID, &Invalid);
375  if (Invalid)
376  return None;
377 
378  llvm::MD5 Hash;
379  llvm::MD5::MD5Result Result;
380 
381  Hash.update(MemBuffer->getBuffer());
382  Hash.final(Result);
383 
384  Hash.stringifyResult(Result, Checksum);
385  return llvm::DIFile::CSK_MD5;
386 }
387 
388 llvm::DIFile *CGDebugInfo::getOrCreateFile(SourceLocation Loc) {
389  if (!Loc.isValid())
390  // If Location is not valid then use main input file.
391  return DBuilder.createFile(remapDIPath(TheCU->getFilename()),
392  remapDIPath(TheCU->getDirectory()),
393  TheCU->getFile()->getChecksum());
394 
395  SourceManager &SM = CGM.getContext().getSourceManager();
396  PresumedLoc PLoc = SM.getPresumedLoc(Loc);
397 
398  if (PLoc.isInvalid() || StringRef(PLoc.getFilename()).empty())
399  // If the location is not valid then use main input file.
400  return DBuilder.createFile(remapDIPath(TheCU->getFilename()),
401  remapDIPath(TheCU->getDirectory()),
402  TheCU->getFile()->getChecksum());
403 
404  // Cache the results.
405  const char *fname = PLoc.getFilename();
406  auto it = DIFileCache.find(fname);
407 
408  if (it != DIFileCache.end()) {
409  // Verify that the information still exists.
410  if (llvm::Metadata *V = it->second)
411  return cast<llvm::DIFile>(V);
412  }
413 
414  SmallString<32> Checksum;
416  computeChecksum(SM.getFileID(Loc), Checksum);
418  if (CSKind)
419  CSInfo.emplace(*CSKind, Checksum);
420 
421  llvm::DIFile *F = DBuilder.createFile(remapDIPath(PLoc.getFilename()),
422  remapDIPath(getCurrentDirname()),
423  CSInfo);
424 
425  DIFileCache[fname].reset(F);
426  return F;
427 }
428 
429 llvm::DIFile *CGDebugInfo::getOrCreateMainFile() {
430  return DBuilder.createFile(remapDIPath(TheCU->getFilename()),
431  remapDIPath(TheCU->getDirectory()),
432  TheCU->getFile()->getChecksum());
433 }
434 
435 std::string CGDebugInfo::remapDIPath(StringRef Path) const {
436  for (const auto &Entry : DebugPrefixMap)
437  if (Path.startswith(Entry.first))
438  return (Twine(Entry.second) + Path.substr(Entry.first.size())).str();
439  return Path.str();
440 }
441 
442 unsigned CGDebugInfo::getLineNumber(SourceLocation Loc) {
443  if (Loc.isInvalid() && CurLoc.isInvalid())
444  return 0;
445  SourceManager &SM = CGM.getContext().getSourceManager();
446  PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc);
447  return PLoc.isValid() ? PLoc.getLine() : 0;
448 }
449 
450 unsigned CGDebugInfo::getColumnNumber(SourceLocation Loc, bool Force) {
451  // We may not want column information at all.
452  if (!Force && !CGM.getCodeGenOpts().DebugColumnInfo)
453  return 0;
454 
455  // If the location is invalid then use the current column.
456  if (Loc.isInvalid() && CurLoc.isInvalid())
457  return 0;
458  SourceManager &SM = CGM.getContext().getSourceManager();
459  PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc);
460  return PLoc.isValid() ? PLoc.getColumn() : 0;
461 }
462 
463 StringRef CGDebugInfo::getCurrentDirname() {
464  if (!CGM.getCodeGenOpts().DebugCompilationDir.empty())
465  return CGM.getCodeGenOpts().DebugCompilationDir;
466 
467  if (!CWDName.empty())
468  return CWDName;
469  SmallString<256> CWD;
470  llvm::sys::fs::current_path(CWD);
471  return CWDName = internString(CWD);
472 }
473 
474 void CGDebugInfo::CreateCompileUnit() {
475  SmallString<32> Checksum;
478 
479  // Should we be asking the SourceManager for the main file name, instead of
480  // accepting it as an argument? This just causes the main file name to
481  // mismatch with source locations and create extra lexical scopes or
482  // mismatched debug info (a CU with a DW_AT_file of "-", because that's what
483  // the driver passed, but functions/other things have DW_AT_file of "<stdin>"
484  // because that's what the SourceManager says)
485 
486  // Get absolute path name.
487  SourceManager &SM = CGM.getContext().getSourceManager();
488  std::string MainFileName = CGM.getCodeGenOpts().MainFileName;
489  if (MainFileName.empty())
490  MainFileName = "<stdin>";
491 
492  // The main file name provided via the "-main-file-name" option contains just
493  // the file name itself with no path information. This file name may have had
494  // a relative path, so we look into the actual file entry for the main
495  // file to determine the real absolute path for the file.
496  std::string MainFileDir;
497  if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
498  MainFileDir = remapDIPath(MainFile->getDir()->getName());
499  if (MainFileDir != ".") {
500  llvm::SmallString<1024> MainFileDirSS(MainFileDir);
501  llvm::sys::path::append(MainFileDirSS, MainFileName);
502  MainFileName = MainFileDirSS.str();
503  }
504  // If the main file name provided is identical to the input file name, and
505  // if the input file is a preprocessed source, use the module name for
506  // debug info. The module name comes from the name specified in the first
507  // linemarker if the input is a preprocessed source.
508  if (MainFile->getName() == MainFileName &&
510  MainFile->getName().rsplit('.').second)
511  .isPreprocessed())
512  MainFileName = CGM.getModule().getName().str();
513 
514  CSKind = computeChecksum(SM.getMainFileID(), Checksum);
515  }
516 
517  llvm::dwarf::SourceLanguage LangTag;
518  const LangOptions &LO = CGM.getLangOpts();
519  if (LO.CPlusPlus) {
520  if (LO.ObjC1)
521  LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus;
522  else
523  LangTag = llvm::dwarf::DW_LANG_C_plus_plus;
524  } else if (LO.ObjC1) {
525  LangTag = llvm::dwarf::DW_LANG_ObjC;
526  } else if (LO.RenderScript) {
527  LangTag = llvm::dwarf::DW_LANG_GOOGLE_RenderScript;
528  } else if (LO.C99) {
529  LangTag = llvm::dwarf::DW_LANG_C99;
530  } else {
531  LangTag = llvm::dwarf::DW_LANG_C89;
532  }
533 
534  std::string Producer = getClangFullVersion();
535 
536  // Figure out which version of the ObjC runtime we have.
537  unsigned RuntimeVers = 0;
538  if (LO.ObjC1)
539  RuntimeVers = LO.ObjCRuntime.isNonFragile() ? 2 : 1;
540 
541  llvm::DICompileUnit::DebugEmissionKind EmissionKind;
542  switch (DebugKind) {
545  EmissionKind = llvm::DICompileUnit::NoDebug;
546  break;
548  EmissionKind = llvm::DICompileUnit::LineTablesOnly;
549  break;
552  EmissionKind = llvm::DICompileUnit::FullDebug;
553  break;
554  }
555 
556  if (CSKind)
557  CSInfo.emplace(*CSKind, Checksum);
558 
559  // Create new compile unit.
560  // FIXME - Eliminate TheCU.
561  auto &CGOpts = CGM.getCodeGenOpts();
562  TheCU = DBuilder.createCompileUnit(
563  LangTag,
564  DBuilder.createFile(remapDIPath(MainFileName),
565  remapDIPath(getCurrentDirname()), CSInfo),
566  Producer, LO.Optimize || CGOpts.PrepareForLTO || CGOpts.EmitSummaryIndex,
567  CGOpts.DwarfDebugFlags, RuntimeVers,
568  CGOpts.EnableSplitDwarf ? "" : CGOpts.SplitDwarfFile, EmissionKind,
569  0 /* DWOid */, CGOpts.SplitDwarfInlining, CGOpts.DebugInfoForProfiling,
570  CGOpts.GnuPubnames);
571 }
572 
573 llvm::DIType *CGDebugInfo::CreateType(const BuiltinType *BT) {
574  llvm::dwarf::TypeKind Encoding;
575  StringRef BTName;
576  switch (BT->getKind()) {
577 #define BUILTIN_TYPE(Id, SingletonId)
578 #define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
579 #include "clang/AST/BuiltinTypes.def"
580  case BuiltinType::Dependent:
581  llvm_unreachable("Unexpected builtin type");
582  case BuiltinType::NullPtr:
583  return DBuilder.createNullPtrType();
584  case BuiltinType::Void:
585  return nullptr;
586  case BuiltinType::ObjCClass:
587  if (!ClassTy)
588  ClassTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
589  "objc_class", TheCU,
590  getOrCreateMainFile(), 0);
591  return ClassTy;
592  case BuiltinType::ObjCId: {
593  // typedef struct objc_class *Class;
594  // typedef struct objc_object {
595  // Class isa;
596  // } *id;
597 
598  if (ObjTy)
599  return ObjTy;
600 
601  if (!ClassTy)
602  ClassTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
603  "objc_class", TheCU,
604  getOrCreateMainFile(), 0);
605 
606  unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
607 
608  auto *ISATy = DBuilder.createPointerType(ClassTy, Size);
609 
610  ObjTy = DBuilder.createStructType(
611  TheCU, "objc_object", getOrCreateMainFile(), 0, 0, 0,
612  llvm::DINode::FlagZero, nullptr, llvm::DINodeArray());
613 
614  DBuilder.replaceArrays(
615  ObjTy, DBuilder.getOrCreateArray(&*DBuilder.createMemberType(
616  ObjTy, "isa", getOrCreateMainFile(), 0, Size, 0, 0,
617  llvm::DINode::FlagZero, ISATy)));
618  return ObjTy;
619  }
620  case BuiltinType::ObjCSel: {
621  if (!SelTy)
622  SelTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
623  "objc_selector", TheCU,
624  getOrCreateMainFile(), 0);
625  return SelTy;
626  }
627 
628 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
629  case BuiltinType::Id: \
630  return getOrCreateStructPtrType("opencl_" #ImgType "_" #Suffix "_t", \
631  SingletonId);
632 #include "clang/Basic/OpenCLImageTypes.def"
633  case BuiltinType::OCLSampler:
634  return getOrCreateStructPtrType("opencl_sampler_t",
635  OCLSamplerDITy);
636  case BuiltinType::OCLEvent:
637  return getOrCreateStructPtrType("opencl_event_t", OCLEventDITy);
638  case BuiltinType::OCLClkEvent:
639  return getOrCreateStructPtrType("opencl_clk_event_t", OCLClkEventDITy);
640  case BuiltinType::OCLQueue:
641  return getOrCreateStructPtrType("opencl_queue_t", OCLQueueDITy);
642  case BuiltinType::OCLReserveID:
643  return getOrCreateStructPtrType("opencl_reserve_id_t", OCLReserveIDDITy);
644 
645  case BuiltinType::UChar:
646  case BuiltinType::Char_U:
647  Encoding = llvm::dwarf::DW_ATE_unsigned_char;
648  break;
649  case BuiltinType::Char_S:
650  case BuiltinType::SChar:
651  Encoding = llvm::dwarf::DW_ATE_signed_char;
652  break;
653  case BuiltinType::Char16:
654  case BuiltinType::Char32:
655  Encoding = llvm::dwarf::DW_ATE_UTF;
656  break;
657  case BuiltinType::UShort:
658  case BuiltinType::UInt:
659  case BuiltinType::UInt128:
660  case BuiltinType::ULong:
661  case BuiltinType::WChar_U:
662  case BuiltinType::ULongLong:
663  Encoding = llvm::dwarf::DW_ATE_unsigned;
664  break;
665  case BuiltinType::Short:
666  case BuiltinType::Int:
667  case BuiltinType::Int128:
668  case BuiltinType::Long:
669  case BuiltinType::WChar_S:
670  case BuiltinType::LongLong:
671  Encoding = llvm::dwarf::DW_ATE_signed;
672  break;
673  case BuiltinType::Bool:
674  Encoding = llvm::dwarf::DW_ATE_boolean;
675  break;
676  case BuiltinType::Half:
677  case BuiltinType::Float:
678  case BuiltinType::LongDouble:
679  case BuiltinType::Float16:
680  case BuiltinType::Float128:
681  case BuiltinType::Double:
682  // FIXME: For targets where long double and __float128 have the same size,
683  // they are currently indistinguishable in the debugger without some
684  // special treatment. However, there is currently no consensus on encoding
685  // and this should be updated once a DWARF encoding exists for distinct
686  // floating point types of the same size.
687  Encoding = llvm::dwarf::DW_ATE_float;
688  break;
689  }
690 
691  switch (BT->getKind()) {
692  case BuiltinType::Long:
693  BTName = "long int";
694  break;
695  case BuiltinType::LongLong:
696  BTName = "long long int";
697  break;
698  case BuiltinType::ULong:
699  BTName = "long unsigned int";
700  break;
701  case BuiltinType::ULongLong:
702  BTName = "long long unsigned int";
703  break;
704  default:
705  BTName = BT->getName(CGM.getLangOpts());
706  break;
707  }
708  // Bit size and offset of the type.
709  uint64_t Size = CGM.getContext().getTypeSize(BT);
710  return DBuilder.createBasicType(BTName, Size, Encoding);
711 }
712 
713 llvm::DIType *CGDebugInfo::CreateType(const ComplexType *Ty) {
714  // Bit size and offset of the type.
715  llvm::dwarf::TypeKind Encoding = llvm::dwarf::DW_ATE_complex_float;
716  if (Ty->isComplexIntegerType())
717  Encoding = llvm::dwarf::DW_ATE_lo_user;
718 
719  uint64_t Size = CGM.getContext().getTypeSize(Ty);
720  return DBuilder.createBasicType("complex", Size, Encoding);
721 }
722 
723 llvm::DIType *CGDebugInfo::CreateQualifiedType(QualType Ty,
724  llvm::DIFile *Unit) {
726  const Type *T = Qc.strip(Ty);
727 
728  // Ignore these qualifiers for now.
729  Qc.removeObjCGCAttr();
730  Qc.removeAddressSpace();
731  Qc.removeObjCLifetime();
732 
733  // We will create one Derived type for one qualifier and recurse to handle any
734  // additional ones.
735  llvm::dwarf::Tag Tag;
736  if (Qc.hasConst()) {
737  Tag = llvm::dwarf::DW_TAG_const_type;
738  Qc.removeConst();
739  } else if (Qc.hasVolatile()) {
740  Tag = llvm::dwarf::DW_TAG_volatile_type;
741  Qc.removeVolatile();
742  } else if (Qc.hasRestrict()) {
743  Tag = llvm::dwarf::DW_TAG_restrict_type;
744  Qc.removeRestrict();
745  } else {
746  assert(Qc.empty() && "Unknown type qualifier for debug info");
747  return getOrCreateType(QualType(T, 0), Unit);
748  }
749 
750  auto *FromTy = getOrCreateType(Qc.apply(CGM.getContext(), T), Unit);
751 
752  // No need to fill in the Name, Line, Size, Alignment, Offset in case of
753  // CVR derived types.
754  return DBuilder.createQualifiedType(Tag, FromTy);
755 }
756 
757 llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectPointerType *Ty,
758  llvm::DIFile *Unit) {
759 
760  // The frontend treats 'id' as a typedef to an ObjCObjectType,
761  // whereas 'id<protocol>' is treated as an ObjCPointerType. For the
762  // debug info, we want to emit 'id' in both cases.
763  if (Ty->isObjCQualifiedIdType())
764  return getOrCreateType(CGM.getContext().getObjCIdType(), Unit);
765 
766  return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
767  Ty->getPointeeType(), Unit);
768 }
769 
770 llvm::DIType *CGDebugInfo::CreateType(const PointerType *Ty,
771  llvm::DIFile *Unit) {
772  return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
773  Ty->getPointeeType(), Unit);
774 }
775 
776 /// \return whether a C++ mangling exists for the type defined by TD.
777 static bool hasCXXMangling(const TagDecl *TD, llvm::DICompileUnit *TheCU) {
778  switch (TheCU->getSourceLanguage()) {
779  case llvm::dwarf::DW_LANG_C_plus_plus:
780  return true;
781  case llvm::dwarf::DW_LANG_ObjC_plus_plus:
782  return isa<CXXRecordDecl>(TD) || isa<EnumDecl>(TD);
783  default:
784  return false;
785  }
786 }
787 
788 /// In C++ mode, types have linkage, so we can rely on the ODR and
789 /// on their mangled names, if they're external.
790 static SmallString<256> getUniqueTagTypeName(const TagType *Ty,
791  CodeGenModule &CGM,
792  llvm::DICompileUnit *TheCU) {
793  SmallString<256> FullName;
794  const TagDecl *TD = Ty->getDecl();
795 
796  if (!hasCXXMangling(TD, TheCU) || !TD->isExternallyVisible())
797  return FullName;
798 
799  // TODO: This is using the RTTI name. Is there a better way to get
800  // a unique string for a type?
801  llvm::raw_svector_ostream Out(FullName);
803  return FullName;
804 }
805 
806 /// \return the approproate DWARF tag for a composite type.
807 static llvm::dwarf::Tag getTagForRecord(const RecordDecl *RD) {
808  llvm::dwarf::Tag Tag;
809  if (RD->isStruct() || RD->isInterface())
810  Tag = llvm::dwarf::DW_TAG_structure_type;
811  else if (RD->isUnion())
812  Tag = llvm::dwarf::DW_TAG_union_type;
813  else {
814  // FIXME: This could be a struct type giving a default visibility different
815  // than C++ class type, but needs llvm metadata changes first.
816  assert(RD->isClass());
817  Tag = llvm::dwarf::DW_TAG_class_type;
818  }
819  return Tag;
820 }
821 
822 llvm::DICompositeType *
823 CGDebugInfo::getOrCreateRecordFwdDecl(const RecordType *Ty,
824  llvm::DIScope *Ctx) {
825  const RecordDecl *RD = Ty->getDecl();
826  if (llvm::DIType *T = getTypeOrNull(CGM.getContext().getRecordType(RD)))
827  return cast<llvm::DICompositeType>(T);
828  llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
829  unsigned Line = getLineNumber(RD->getLocation());
830  StringRef RDName = getClassName(RD);
831 
832  uint64_t Size = 0;
833  uint32_t Align = 0;
834 
835  // Create the type.
836  SmallString<256> FullName = getUniqueTagTypeName(Ty, CGM, TheCU);
837  llvm::DICompositeType *RetTy = DBuilder.createReplaceableCompositeType(
838  getTagForRecord(RD), RDName, Ctx, DefUnit, Line, 0, Size, Align,
839  llvm::DINode::FlagFwdDecl, FullName);
840  if (CGM.getCodeGenOpts().DebugFwdTemplateParams)
841  if (auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD))
842  DBuilder.replaceArrays(RetTy, llvm::DINodeArray(),
843  CollectCXXTemplateParams(TSpecial, DefUnit));
844  ReplaceMap.emplace_back(
845  std::piecewise_construct, std::make_tuple(Ty),
846  std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
847  return RetTy;
848 }
849 
850 llvm::DIType *CGDebugInfo::CreatePointerLikeType(llvm::dwarf::Tag Tag,
851  const Type *Ty,
852  QualType PointeeTy,
853  llvm::DIFile *Unit) {
854  // Bit size, align and offset of the type.
855  // Size is always the size of a pointer. We can't use getTypeSize here
856  // because that does not return the correct value for references.
857  unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(PointeeTy);
858  uint64_t Size = CGM.getTarget().getPointerWidth(AddressSpace);
859  auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
860  Optional<unsigned> DWARFAddressSpace =
861  CGM.getTarget().getDWARFAddressSpace(AddressSpace);
862 
863  if (Tag == llvm::dwarf::DW_TAG_reference_type ||
864  Tag == llvm::dwarf::DW_TAG_rvalue_reference_type)
865  return DBuilder.createReferenceType(Tag, getOrCreateType(PointeeTy, Unit),
866  Size, Align, DWARFAddressSpace);
867  else
868  return DBuilder.createPointerType(getOrCreateType(PointeeTy, Unit), Size,
869  Align, DWARFAddressSpace);
870 }
871 
872 llvm::DIType *CGDebugInfo::getOrCreateStructPtrType(StringRef Name,
873  llvm::DIType *&Cache) {
874  if (Cache)
875  return Cache;
876  Cache = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, Name,
877  TheCU, getOrCreateMainFile(), 0);
878  unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
879  Cache = DBuilder.createPointerType(Cache, Size);
880  return Cache;
881 }
882 
883 llvm::DIType *CGDebugInfo::CreateType(const BlockPointerType *Ty,
884  llvm::DIFile *Unit) {
886  QualType FType;
887  uint64_t FieldSize, FieldOffset;
888  uint32_t FieldAlign;
889  llvm::DINodeArray Elements;
890 
891  FieldOffset = 0;
892  FType = CGM.getContext().UnsignedLongTy;
893  EltTys.push_back(CreateMemberType(Unit, FType, "reserved", &FieldOffset));
894  EltTys.push_back(CreateMemberType(Unit, FType, "Size", &FieldOffset));
895 
896  Elements = DBuilder.getOrCreateArray(EltTys);
897  EltTys.clear();
898 
899  llvm::DINode::DIFlags Flags = llvm::DINode::FlagAppleBlock;
900  unsigned LineNo = 0;
901 
902  auto *EltTy =
903  DBuilder.createStructType(Unit, "__block_descriptor", nullptr, LineNo,
904  FieldOffset, 0, Flags, nullptr, Elements);
905 
906  // Bit size, align and offset of the type.
907  uint64_t Size = CGM.getContext().getTypeSize(Ty);
908 
909  auto *DescTy = DBuilder.createPointerType(EltTy, Size);
910 
911  FieldOffset = 0;
912  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
913  EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
914  FType = CGM.getContext().IntTy;
915  EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
916  EltTys.push_back(CreateMemberType(Unit, FType, "__reserved", &FieldOffset));
917  FType = CGM.getContext().getPointerType(Ty->getPointeeType());
918  EltTys.push_back(CreateMemberType(Unit, FType, "__FuncPtr", &FieldOffset));
919 
920  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
921  FieldSize = CGM.getContext().getTypeSize(Ty);
922  FieldAlign = CGM.getContext().getTypeAlign(Ty);
923  EltTys.push_back(DBuilder.createMemberType(
924  Unit, "__descriptor", nullptr, LineNo, FieldSize, FieldAlign, FieldOffset,
925  llvm::DINode::FlagZero, DescTy));
926 
927  FieldOffset += FieldSize;
928  Elements = DBuilder.getOrCreateArray(EltTys);
929 
930  // The __block_literal_generic structs are marked with a special
931  // DW_AT_APPLE_BLOCK attribute and are an implementation detail only
932  // the debugger needs to know about. To allow type uniquing, emit
933  // them without a name or a location.
934  EltTy =
935  DBuilder.createStructType(Unit, "", nullptr, LineNo,
936  FieldOffset, 0, Flags, nullptr, Elements);
937 
938  return DBuilder.createPointerType(EltTy, Size);
939 }
940 
941 llvm::DIType *CGDebugInfo::CreateType(const TemplateSpecializationType *Ty,
942  llvm::DIFile *Unit) {
943  assert(Ty->isTypeAlias());
944  llvm::DIType *Src = getOrCreateType(Ty->getAliasedType(), Unit);
945 
946  SmallString<128> NS;
947  llvm::raw_svector_ostream OS(NS);
948  Ty->getTemplateName().print(OS, getPrintingPolicy(), /*qualified*/ false);
949  printTemplateArgumentList(OS, Ty->template_arguments(), getPrintingPolicy());
950 
951  auto *AliasDecl = cast<TypeAliasTemplateDecl>(
952  Ty->getTemplateName().getAsTemplateDecl())->getTemplatedDecl();
953 
954  SourceLocation Loc = AliasDecl->getLocation();
955  return DBuilder.createTypedef(Src, OS.str(), getOrCreateFile(Loc),
956  getLineNumber(Loc),
957  getDeclContextDescriptor(AliasDecl));
958 }
959 
960 llvm::DIType *CGDebugInfo::CreateType(const TypedefType *Ty,
961  llvm::DIFile *Unit) {
962  // We don't set size information, but do specify where the typedef was
963  // declared.
964  SourceLocation Loc = Ty->getDecl()->getLocation();
965 
966  // Typedefs are derived from some other type.
967  return DBuilder.createTypedef(
968  getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit),
969  Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc),
970  getDeclContextDescriptor(Ty->getDecl()));
971 }
972 
973 static unsigned getDwarfCC(CallingConv CC) {
974  switch (CC) {
975  case CC_C:
976  // Avoid emitting DW_AT_calling_convention if the C convention was used.
977  return 0;
978 
979  case CC_X86StdCall:
980  return llvm::dwarf::DW_CC_BORLAND_stdcall;
981  case CC_X86FastCall:
982  return llvm::dwarf::DW_CC_BORLAND_msfastcall;
983  case CC_X86ThisCall:
984  return llvm::dwarf::DW_CC_BORLAND_thiscall;
985  case CC_X86VectorCall:
986  return llvm::dwarf::DW_CC_LLVM_vectorcall;
987  case CC_X86Pascal:
988  return llvm::dwarf::DW_CC_BORLAND_pascal;
989 
990  // FIXME: Create new DW_CC_ codes for these calling conventions.
991  case CC_Win64:
992  case CC_X86_64SysV:
993  case CC_AAPCS:
994  case CC_AAPCS_VFP:
995  case CC_IntelOclBicc:
996  case CC_SpirFunction:
997  case CC_OpenCLKernel:
998  case CC_Swift:
999  case CC_PreserveMost:
1000  case CC_PreserveAll:
1001  case CC_X86RegCall:
1002  return 0;
1003  }
1004  return 0;
1005 }
1006 
1007 llvm::DIType *CGDebugInfo::CreateType(const FunctionType *Ty,
1008  llvm::DIFile *Unit) {
1010 
1011  // Add the result type at least.
1012  EltTys.push_back(getOrCreateType(Ty->getReturnType(), Unit));
1013 
1014  // Set up remainder of arguments if there is a prototype.
1015  // otherwise emit it as a variadic function.
1016  if (isa<FunctionNoProtoType>(Ty))
1017  EltTys.push_back(DBuilder.createUnspecifiedParameter());
1018  else if (const auto *FPT = dyn_cast<FunctionProtoType>(Ty)) {
1019  for (const QualType &ParamType : FPT->param_types())
1020  EltTys.push_back(getOrCreateType(ParamType, Unit));
1021  if (FPT->isVariadic())
1022  EltTys.push_back(DBuilder.createUnspecifiedParameter());
1023  }
1024 
1025  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys);
1026  return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
1027  getDwarfCC(Ty->getCallConv()));
1028 }
1029 
1030 /// Convert an AccessSpecifier into the corresponding DINode flag.
1031 /// As an optimization, return 0 if the access specifier equals the
1032 /// default for the containing type.
1033 static llvm::DINode::DIFlags getAccessFlag(AccessSpecifier Access,
1034  const RecordDecl *RD) {
1036  if (RD && RD->isClass())
1037  Default = clang::AS_private;
1038  else if (RD && (RD->isStruct() || RD->isUnion()))
1039  Default = clang::AS_public;
1040 
1041  if (Access == Default)
1042  return llvm::DINode::FlagZero;
1043 
1044  switch (Access) {
1045  case clang::AS_private:
1046  return llvm::DINode::FlagPrivate;
1047  case clang::AS_protected:
1048  return llvm::DINode::FlagProtected;
1049  case clang::AS_public:
1050  return llvm::DINode::FlagPublic;
1051  case clang::AS_none:
1052  return llvm::DINode::FlagZero;
1053  }
1054  llvm_unreachable("unexpected access enumerator");
1055 }
1056 
1057 llvm::DIType *CGDebugInfo::createBitFieldType(const FieldDecl *BitFieldDecl,
1058  llvm::DIScope *RecordTy,
1059  const RecordDecl *RD) {
1060  StringRef Name = BitFieldDecl->getName();
1061  QualType Ty = BitFieldDecl->getType();
1062  SourceLocation Loc = BitFieldDecl->getLocation();
1063  llvm::DIFile *VUnit = getOrCreateFile(Loc);
1064  llvm::DIType *DebugType = getOrCreateType(Ty, VUnit);
1065 
1066  // Get the location for the field.
1067  llvm::DIFile *File = getOrCreateFile(Loc);
1068  unsigned Line = getLineNumber(Loc);
1069 
1070  const CGBitFieldInfo &BitFieldInfo =
1071  CGM.getTypes().getCGRecordLayout(RD).getBitFieldInfo(BitFieldDecl);
1072  uint64_t SizeInBits = BitFieldInfo.Size;
1073  assert(SizeInBits > 0 && "found named 0-width bitfield");
1074  uint64_t StorageOffsetInBits =
1075  CGM.getContext().toBits(BitFieldInfo.StorageOffset);
1076  uint64_t Offset = BitFieldInfo.Offset;
1077  // The bit offsets for big endian machines are reversed for big
1078  // endian target, compensate for that as the DIDerivedType requires
1079  // un-reversed offsets.
1080  if (CGM.getDataLayout().isBigEndian())
1081  Offset = BitFieldInfo.StorageSize - BitFieldInfo.Size - Offset;
1082  uint64_t OffsetInBits = StorageOffsetInBits + Offset;
1083  llvm::DINode::DIFlags Flags = getAccessFlag(BitFieldDecl->getAccess(), RD);
1084  return DBuilder.createBitFieldMemberType(
1085  RecordTy, Name, File, Line, SizeInBits, OffsetInBits, StorageOffsetInBits,
1086  Flags, DebugType);
1087 }
1088 
1089 llvm::DIType *
1090 CGDebugInfo::createFieldType(StringRef name, QualType type, SourceLocation loc,
1091  AccessSpecifier AS, uint64_t offsetInBits,
1092  uint32_t AlignInBits, llvm::DIFile *tunit,
1093  llvm::DIScope *scope, const RecordDecl *RD) {
1094  llvm::DIType *debugType = getOrCreateType(type, tunit);
1095 
1096  // Get the location for the field.
1097  llvm::DIFile *file = getOrCreateFile(loc);
1098  unsigned line = getLineNumber(loc);
1099 
1100  uint64_t SizeInBits = 0;
1101  auto Align = AlignInBits;
1102  if (!type->isIncompleteArrayType()) {
1103  TypeInfo TI = CGM.getContext().getTypeInfo(type);
1104  SizeInBits = TI.Width;
1105  if (!Align)
1106  Align = getTypeAlignIfRequired(type, CGM.getContext());
1107  }
1108 
1109  llvm::DINode::DIFlags flags = getAccessFlag(AS, RD);
1110  return DBuilder.createMemberType(scope, name, file, line, SizeInBits,
1111  Align, offsetInBits, flags, debugType);
1112 }
1113 
1114 void CGDebugInfo::CollectRecordLambdaFields(
1115  const CXXRecordDecl *CXXDecl, SmallVectorImpl<llvm::Metadata *> &elements,
1116  llvm::DIType *RecordTy) {
1117  // For C++11 Lambdas a Field will be the same as a Capture, but the Capture
1118  // has the name and the location of the variable so we should iterate over
1119  // both concurrently.
1120  const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(CXXDecl);
1121  RecordDecl::field_iterator Field = CXXDecl->field_begin();
1122  unsigned fieldno = 0;
1124  E = CXXDecl->captures_end();
1125  I != E; ++I, ++Field, ++fieldno) {
1126  const LambdaCapture &C = *I;
1127  if (C.capturesVariable()) {
1128  SourceLocation Loc = C.getLocation();
1129  assert(!Field->isBitField() && "lambdas don't have bitfield members!");
1130  VarDecl *V = C.getCapturedVar();
1131  StringRef VName = V->getName();
1132  llvm::DIFile *VUnit = getOrCreateFile(Loc);
1133  auto Align = getDeclAlignIfRequired(V, CGM.getContext());
1134  llvm::DIType *FieldType = createFieldType(
1135  VName, Field->getType(), Loc, Field->getAccess(),
1136  layout.getFieldOffset(fieldno), Align, VUnit, RecordTy, CXXDecl);
1137  elements.push_back(FieldType);
1138  } else if (C.capturesThis()) {
1139  // TODO: Need to handle 'this' in some way by probably renaming the
1140  // this of the lambda class and having a field member of 'this' or
1141  // by using AT_object_pointer for the function and having that be
1142  // used as 'this' for semantic references.
1143  FieldDecl *f = *Field;
1144  llvm::DIFile *VUnit = getOrCreateFile(f->getLocation());
1145  QualType type = f->getType();
1146  llvm::DIType *fieldType = createFieldType(
1147  "this", type, f->getLocation(), f->getAccess(),
1148  layout.getFieldOffset(fieldno), VUnit, RecordTy, CXXDecl);
1149 
1150  elements.push_back(fieldType);
1151  }
1152  }
1153 }
1154 
1155 llvm::DIDerivedType *
1156 CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy,
1157  const RecordDecl *RD) {
1158  // Create the descriptor for the static variable, with or without
1159  // constant initializers.
1160  Var = Var->getCanonicalDecl();
1161  llvm::DIFile *VUnit = getOrCreateFile(Var->getLocation());
1162  llvm::DIType *VTy = getOrCreateType(Var->getType(), VUnit);
1163 
1164  unsigned LineNumber = getLineNumber(Var->getLocation());
1165  StringRef VName = Var->getName();
1166  llvm::Constant *C = nullptr;
1167  if (Var->getInit()) {
1168  const APValue *Value = Var->evaluateValue();
1169  if (Value) {
1170  if (Value->isInt())
1171  C = llvm::ConstantInt::get(CGM.getLLVMContext(), Value->getInt());
1172  if (Value->isFloat())
1173  C = llvm::ConstantFP::get(CGM.getLLVMContext(), Value->getFloat());
1174  }
1175  }
1176 
1177  llvm::DINode::DIFlags Flags = getAccessFlag(Var->getAccess(), RD);
1178  auto Align = getDeclAlignIfRequired(Var, CGM.getContext());
1179  llvm::DIDerivedType *GV = DBuilder.createStaticMemberType(
1180  RecordTy, VName, VUnit, LineNumber, VTy, Flags, C, Align);
1181  StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV);
1182  return GV;
1183 }
1184 
1185 void CGDebugInfo::CollectRecordNormalField(
1186  const FieldDecl *field, uint64_t OffsetInBits, llvm::DIFile *tunit,
1187  SmallVectorImpl<llvm::Metadata *> &elements, llvm::DIType *RecordTy,
1188  const RecordDecl *RD) {
1189  StringRef name = field->getName();
1190  QualType type = field->getType();
1191 
1192  // Ignore unnamed fields unless they're anonymous structs/unions.
1193  if (name.empty() && !type->isRecordType())
1194  return;
1195 
1196  llvm::DIType *FieldType;
1197  if (field->isBitField()) {
1198  FieldType = createBitFieldType(field, RecordTy, RD);
1199  } else {
1200  auto Align = getDeclAlignIfRequired(field, CGM.getContext());
1201  FieldType =
1202  createFieldType(name, type, field->getLocation(), field->getAccess(),
1203  OffsetInBits, Align, tunit, RecordTy, RD);
1204  }
1205 
1206  elements.push_back(FieldType);
1207 }
1208 
1209 void CGDebugInfo::CollectRecordNestedType(
1210  const TypeDecl *TD, SmallVectorImpl<llvm::Metadata *> &elements) {
1211  QualType Ty = CGM.getContext().getTypeDeclType(TD);
1212  // Injected class names are not considered nested records.
1213  if (isa<InjectedClassNameType>(Ty))
1214  return;
1215  SourceLocation Loc = TD->getLocation();
1216  llvm::DIType *nestedType = getOrCreateType(Ty, getOrCreateFile(Loc));
1217  elements.push_back(nestedType);
1218 }
1219 
1220 void CGDebugInfo::CollectRecordFields(
1221  const RecordDecl *record, llvm::DIFile *tunit,
1223  llvm::DICompositeType *RecordTy) {
1224  const auto *CXXDecl = dyn_cast<CXXRecordDecl>(record);
1225 
1226  if (CXXDecl && CXXDecl->isLambda())
1227  CollectRecordLambdaFields(CXXDecl, elements, RecordTy);
1228  else {
1229  const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(record);
1230 
1231  // Debug info for nested types is included in the member list only for
1232  // CodeView.
1233  bool IncludeNestedTypes = CGM.getCodeGenOpts().EmitCodeView;
1234 
1235  // Field number for non-static fields.
1236  unsigned fieldNo = 0;
1237 
1238  // Static and non-static members should appear in the same order as
1239  // the corresponding declarations in the source program.
1240  for (const auto *I : record->decls())
1241  if (const auto *V = dyn_cast<VarDecl>(I)) {
1242  if (V->hasAttr<NoDebugAttr>())
1243  continue;
1244  // Reuse the existing static member declaration if one exists
1245  auto MI = StaticDataMemberCache.find(V->getCanonicalDecl());
1246  if (MI != StaticDataMemberCache.end()) {
1247  assert(MI->second &&
1248  "Static data member declaration should still exist");
1249  elements.push_back(MI->second);
1250  } else {
1251  auto Field = CreateRecordStaticField(V, RecordTy, record);
1252  elements.push_back(Field);
1253  }
1254  } else if (const auto *field = dyn_cast<FieldDecl>(I)) {
1255  CollectRecordNormalField(field, layout.getFieldOffset(fieldNo), tunit,
1256  elements, RecordTy, record);
1257 
1258  // Bump field number for next field.
1259  ++fieldNo;
1260  } else if (IncludeNestedTypes) {
1261  if (const auto *nestedType = dyn_cast<TypeDecl>(I))
1262  if (!nestedType->isImplicit() &&
1263  nestedType->getDeclContext() == record)
1264  CollectRecordNestedType(nestedType, elements);
1265  }
1266  }
1267 }
1268 
1269 llvm::DISubroutineType *
1270 CGDebugInfo::getOrCreateMethodType(const CXXMethodDecl *Method,
1271  llvm::DIFile *Unit) {
1272  const FunctionProtoType *Func = Method->getType()->getAs<FunctionProtoType>();
1273  if (Method->isStatic())
1274  return cast_or_null<llvm::DISubroutineType>(
1275  getOrCreateType(QualType(Func, 0), Unit));
1276  return getOrCreateInstanceMethodType(Method->getThisType(CGM.getContext()),
1277  Func, Unit);
1278 }
1279 
1280 llvm::DISubroutineType *CGDebugInfo::getOrCreateInstanceMethodType(
1281  QualType ThisPtr, const FunctionProtoType *Func, llvm::DIFile *Unit) {
1282  // Add "this" pointer.
1283  llvm::DITypeRefArray Args(
1284  cast<llvm::DISubroutineType>(getOrCreateType(QualType(Func, 0), Unit))
1285  ->getTypeArray());
1286  assert(Args.size() && "Invalid number of arguments!");
1287 
1289 
1290  // First element is always return type. For 'void' functions it is NULL.
1291  Elts.push_back(Args[0]);
1292 
1293  // "this" pointer is always first argument.
1294  const CXXRecordDecl *RD = ThisPtr->getPointeeCXXRecordDecl();
1295  if (isa<ClassTemplateSpecializationDecl>(RD)) {
1296  // Create pointer type directly in this case.
1297  const PointerType *ThisPtrTy = cast<PointerType>(ThisPtr);
1298  QualType PointeeTy = ThisPtrTy->getPointeeType();
1299  unsigned AS = CGM.getContext().getTargetAddressSpace(PointeeTy);
1300  uint64_t Size = CGM.getTarget().getPointerWidth(AS);
1301  auto Align = getTypeAlignIfRequired(ThisPtrTy, CGM.getContext());
1302  llvm::DIType *PointeeType = getOrCreateType(PointeeTy, Unit);
1303  llvm::DIType *ThisPtrType =
1304  DBuilder.createPointerType(PointeeType, Size, Align);
1305  TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
1306  // TODO: This and the artificial type below are misleading, the
1307  // types aren't artificial the argument is, but the current
1308  // metadata doesn't represent that.
1309  ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType);
1310  Elts.push_back(ThisPtrType);
1311  } else {
1312  llvm::DIType *ThisPtrType = getOrCreateType(ThisPtr, Unit);
1313  TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
1314  ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType);
1315  Elts.push_back(ThisPtrType);
1316  }
1317 
1318  // Copy rest of the arguments.
1319  for (unsigned i = 1, e = Args.size(); i != e; ++i)
1320  Elts.push_back(Args[i]);
1321 
1322  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts);
1323 
1324  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
1325  if (Func->getExtProtoInfo().RefQualifier == RQ_LValue)
1326  Flags |= llvm::DINode::FlagLValueReference;
1327  if (Func->getExtProtoInfo().RefQualifier == RQ_RValue)
1328  Flags |= llvm::DINode::FlagRValueReference;
1329 
1330  return DBuilder.createSubroutineType(EltTypeArray, Flags,
1331  getDwarfCC(Func->getCallConv()));
1332 }
1333 
1334 /// isFunctionLocalClass - Return true if CXXRecordDecl is defined
1335 /// inside a function.
1336 static bool isFunctionLocalClass(const CXXRecordDecl *RD) {
1337  if (const auto *NRD = dyn_cast<CXXRecordDecl>(RD->getDeclContext()))
1338  return isFunctionLocalClass(NRD);
1339  if (isa<FunctionDecl>(RD->getDeclContext()))
1340  return true;
1341  return false;
1342 }
1343 
1344 llvm::DISubprogram *CGDebugInfo::CreateCXXMemberFunction(
1345  const CXXMethodDecl *Method, llvm::DIFile *Unit, llvm::DIType *RecordTy) {
1346  bool IsCtorOrDtor =
1347  isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method);
1348 
1349  StringRef MethodName = getFunctionName(Method);
1350  llvm::DISubroutineType *MethodTy = getOrCreateMethodType(Method, Unit);
1351 
1352  // Since a single ctor/dtor corresponds to multiple functions, it doesn't
1353  // make sense to give a single ctor/dtor a linkage name.
1354  StringRef MethodLinkageName;
1355  // FIXME: 'isFunctionLocalClass' seems like an arbitrary/unintentional
1356  // property to use here. It may've been intended to model "is non-external
1357  // type" but misses cases of non-function-local but non-external classes such
1358  // as those in anonymous namespaces as well as the reverse - external types
1359  // that are function local, such as those in (non-local) inline functions.
1360  if (!IsCtorOrDtor && !isFunctionLocalClass(Method->getParent()))
1361  MethodLinkageName = CGM.getMangledName(Method);
1362 
1363  // Get the location for the method.
1364  llvm::DIFile *MethodDefUnit = nullptr;
1365  unsigned MethodLine = 0;
1366  if (!Method->isImplicit()) {
1367  MethodDefUnit = getOrCreateFile(Method->getLocation());
1368  MethodLine = getLineNumber(Method->getLocation());
1369  }
1370 
1371  // Collect virtual method info.
1372  llvm::DIType *ContainingType = nullptr;
1373  unsigned Virtuality = 0;
1374  unsigned VIndex = 0;
1375  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
1376  int ThisAdjustment = 0;
1377 
1378  if (Method->isVirtual()) {
1379  if (Method->isPure())
1380  Virtuality = llvm::dwarf::DW_VIRTUALITY_pure_virtual;
1381  else
1382  Virtuality = llvm::dwarf::DW_VIRTUALITY_virtual;
1383 
1384  if (CGM.getTarget().getCXXABI().isItaniumFamily()) {
1385  // It doesn't make sense to give a virtual destructor a vtable index,
1386  // since a single destructor has two entries in the vtable.
1387  if (!isa<CXXDestructorDecl>(Method))
1388  VIndex = CGM.getItaniumVTableContext().getMethodVTableIndex(Method);
1389  } else {
1390  // Emit MS ABI vftable information. There is only one entry for the
1391  // deleting dtor.
1392  const auto *DD = dyn_cast<CXXDestructorDecl>(Method);
1393  GlobalDecl GD = DD ? GlobalDecl(DD, Dtor_Deleting) : GlobalDecl(Method);
1395  CGM.getMicrosoftVTableContext().getMethodVFTableLocation(GD);
1396  VIndex = ML.Index;
1397 
1398  // CodeView only records the vftable offset in the class that introduces
1399  // the virtual method. This is possible because, unlike Itanium, the MS
1400  // C++ ABI does not include all virtual methods from non-primary bases in
1401  // the vtable for the most derived class. For example, if C inherits from
1402  // A and B, C's primary vftable will not include B's virtual methods.
1403  if (Method->size_overridden_methods() == 0)
1404  Flags |= llvm::DINode::FlagIntroducedVirtual;
1405 
1406  // The 'this' adjustment accounts for both the virtual and non-virtual
1407  // portions of the adjustment. Presumably the debugger only uses it when
1408  // it knows the dynamic type of an object.
1409  ThisAdjustment = CGM.getCXXABI()
1410  .getVirtualFunctionPrologueThisAdjustment(GD)
1411  .getQuantity();
1412  }
1413  ContainingType = RecordTy;
1414  }
1415 
1416  if (Method->isStatic())
1417  Flags |= llvm::DINode::FlagStaticMember;
1418  if (Method->isImplicit())
1419  Flags |= llvm::DINode::FlagArtificial;
1420  Flags |= getAccessFlag(Method->getAccess(), Method->getParent());
1421  if (const auto *CXXC = dyn_cast<CXXConstructorDecl>(Method)) {
1422  if (CXXC->isExplicit())
1423  Flags |= llvm::DINode::FlagExplicit;
1424  } else if (const auto *CXXC = dyn_cast<CXXConversionDecl>(Method)) {
1425  if (CXXC->isExplicit())
1426  Flags |= llvm::DINode::FlagExplicit;
1427  }
1428  if (Method->hasPrototype())
1429  Flags |= llvm::DINode::FlagPrototyped;
1430  if (Method->getRefQualifier() == RQ_LValue)
1431  Flags |= llvm::DINode::FlagLValueReference;
1432  if (Method->getRefQualifier() == RQ_RValue)
1433  Flags |= llvm::DINode::FlagRValueReference;
1434 
1435  llvm::DINodeArray TParamsArray = CollectFunctionTemplateParams(Method, Unit);
1436  llvm::DISubprogram *SP = DBuilder.createMethod(
1437  RecordTy, MethodName, MethodLinkageName, MethodDefUnit, MethodLine,
1438  MethodTy, /*isLocalToUnit=*/false, /*isDefinition=*/false, Virtuality,
1439  VIndex, ThisAdjustment, ContainingType, Flags, CGM.getLangOpts().Optimize,
1440  TParamsArray.get());
1441 
1442  SPCache[Method->getCanonicalDecl()].reset(SP);
1443 
1444  return SP;
1445 }
1446 
1447 void CGDebugInfo::CollectCXXMemberFunctions(
1448  const CXXRecordDecl *RD, llvm::DIFile *Unit,
1449  SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy) {
1450 
1451  // Since we want more than just the individual member decls if we
1452  // have templated functions iterate over every declaration to gather
1453  // the functions.
1454  for (const auto *I : RD->decls()) {
1455  const auto *Method = dyn_cast<CXXMethodDecl>(I);
1456  // If the member is implicit, don't add it to the member list. This avoids
1457  // the member being added to type units by LLVM, while still allowing it
1458  // to be emitted into the type declaration/reference inside the compile
1459  // unit.
1460  // Ditto 'nodebug' methods, for consistency with CodeGenFunction.cpp.
1461  // FIXME: Handle Using(Shadow?)Decls here to create
1462  // DW_TAG_imported_declarations inside the class for base decls brought into
1463  // derived classes. GDB doesn't seem to notice/leverage these when I tried
1464  // it, so I'm not rushing to fix this. (GCC seems to produce them, if
1465  // referenced)
1466  if (!Method || Method->isImplicit() || Method->hasAttr<NoDebugAttr>())
1467  continue;
1468 
1469  if (Method->getType()->getAs<FunctionProtoType>()->getContainedAutoType())
1470  continue;
1471 
1472  // Reuse the existing member function declaration if it exists.
1473  // It may be associated with the declaration of the type & should be
1474  // reused as we're building the definition.
1475  //
1476  // This situation can arise in the vtable-based debug info reduction where
1477  // implicit members are emitted in a non-vtable TU.
1478  auto MI = SPCache.find(Method->getCanonicalDecl());
1479  EltTys.push_back(MI == SPCache.end()
1480  ? CreateCXXMemberFunction(Method, Unit, RecordTy)
1481  : static_cast<llvm::Metadata *>(MI->second));
1482  }
1483 }
1484 
1485 void CGDebugInfo::CollectCXXBases(const CXXRecordDecl *RD, llvm::DIFile *Unit,
1487  llvm::DIType *RecordTy) {
1489  CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->bases(), SeenTypes,
1490  llvm::DINode::FlagZero);
1491 
1492  // If we are generating CodeView debug info, we also need to emit records for
1493  // indirect virtual base classes.
1494  if (CGM.getCodeGenOpts().EmitCodeView) {
1495  CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->vbases(), SeenTypes,
1496  llvm::DINode::FlagIndirectVirtualBase);
1497  }
1498 }
1499 
1500 void CGDebugInfo::CollectCXXBasesAux(
1501  const CXXRecordDecl *RD, llvm::DIFile *Unit,
1502  SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy,
1505  llvm::DINode::DIFlags StartingFlags) {
1506  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
1507  for (const auto &BI : Bases) {
1508  const auto *Base =
1509  cast<CXXRecordDecl>(BI.getType()->getAs<RecordType>()->getDecl());
1510  if (!SeenTypes.insert(Base).second)
1511  continue;
1512  auto *BaseTy = getOrCreateType(BI.getType(), Unit);
1513  llvm::DINode::DIFlags BFlags = StartingFlags;
1514  uint64_t BaseOffset;
1515 
1516  if (BI.isVirtual()) {
1517  if (CGM.getTarget().getCXXABI().isItaniumFamily()) {
1518  // virtual base offset offset is -ve. The code generator emits dwarf
1519  // expression where it expects +ve number.
1520  BaseOffset = 0 - CGM.getItaniumVTableContext()
1521  .getVirtualBaseOffsetOffset(RD, Base)
1522  .getQuantity();
1523  } else {
1524  // In the MS ABI, store the vbtable offset, which is analogous to the
1525  // vbase offset offset in Itanium.
1526  BaseOffset =
1527  4 * CGM.getMicrosoftVTableContext().getVBTableIndex(RD, Base);
1528  }
1529  BFlags |= llvm::DINode::FlagVirtual;
1530  } else
1531  BaseOffset = CGM.getContext().toBits(RL.getBaseClassOffset(Base));
1532  // FIXME: Inconsistent units for BaseOffset. It is in bytes when
1533  // BI->isVirtual() and bits when not.
1534 
1535  BFlags |= getAccessFlag(BI.getAccessSpecifier(), RD);
1536  llvm::DIType *DTy =
1537  DBuilder.createInheritance(RecordTy, BaseTy, BaseOffset, BFlags);
1538  EltTys.push_back(DTy);
1539  }
1540 }
1541 
1542 llvm::DINodeArray
1543 CGDebugInfo::CollectTemplateParams(const TemplateParameterList *TPList,
1545  llvm::DIFile *Unit) {
1546  SmallVector<llvm::Metadata *, 16> TemplateParams;
1547  for (unsigned i = 0, e = TAList.size(); i != e; ++i) {
1548  const TemplateArgument &TA = TAList[i];
1549  StringRef Name;
1550  if (TPList)
1551  Name = TPList->getParam(i)->getName();
1552  switch (TA.getKind()) {
1553  case TemplateArgument::Type: {
1554  llvm::DIType *TTy = getOrCreateType(TA.getAsType(), Unit);
1555  TemplateParams.push_back(
1556  DBuilder.createTemplateTypeParameter(TheCU, Name, TTy));
1557  } break;
1559  llvm::DIType *TTy = getOrCreateType(TA.getIntegralType(), Unit);
1560  TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1561  TheCU, Name, TTy,
1562  llvm::ConstantInt::get(CGM.getLLVMContext(), TA.getAsIntegral())));
1563  } break;
1565  const ValueDecl *D = TA.getAsDecl();
1566  QualType T = TA.getParamTypeForDecl().getDesugaredType(CGM.getContext());
1567  llvm::DIType *TTy = getOrCreateType(T, Unit);
1568  llvm::Constant *V = nullptr;
1569  const CXXMethodDecl *MD;
1570  // Variable pointer template parameters have a value that is the address
1571  // of the variable.
1572  if (const auto *VD = dyn_cast<VarDecl>(D))
1573  V = CGM.GetAddrOfGlobalVar(VD);
1574  // Member function pointers have special support for building them, though
1575  // this is currently unsupported in LLVM CodeGen.
1576  else if ((MD = dyn_cast<CXXMethodDecl>(D)) && MD->isInstance())
1577  V = CGM.getCXXABI().EmitMemberFunctionPointer(MD);
1578  else if (const auto *FD = dyn_cast<FunctionDecl>(D))
1579  V = CGM.GetAddrOfFunction(FD);
1580  // Member data pointers have special handling too to compute the fixed
1581  // offset within the object.
1582  else if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr())) {
1583  // These five lines (& possibly the above member function pointer
1584  // handling) might be able to be refactored to use similar code in
1585  // CodeGenModule::getMemberPointerConstant
1586  uint64_t fieldOffset = CGM.getContext().getFieldOffset(D);
1587  CharUnits chars =
1588  CGM.getContext().toCharUnitsFromBits((int64_t)fieldOffset);
1589  V = CGM.getCXXABI().EmitMemberDataPointer(MPT, chars);
1590  }
1591  TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1592  TheCU, Name, TTy,
1593  cast_or_null<llvm::Constant>(V->stripPointerCasts())));
1594  } break;
1596  QualType T = TA.getNullPtrType();
1597  llvm::DIType *TTy = getOrCreateType(T, Unit);
1598  llvm::Constant *V = nullptr;
1599  // Special case member data pointer null values since they're actually -1
1600  // instead of zero.
1601  if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr()))
1602  // But treat member function pointers as simple zero integers because
1603  // it's easier than having a special case in LLVM's CodeGen. If LLVM
1604  // CodeGen grows handling for values of non-null member function
1605  // pointers then perhaps we could remove this special case and rely on
1606  // EmitNullMemberPointer for member function pointers.
1607  if (MPT->isMemberDataPointer())
1608  V = CGM.getCXXABI().EmitNullMemberPointer(MPT);
1609  if (!V)
1610  V = llvm::ConstantInt::get(CGM.Int8Ty, 0);
1611  TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1612  TheCU, Name, TTy, V));
1613  } break;
1615  TemplateParams.push_back(DBuilder.createTemplateTemplateParameter(
1616  TheCU, Name, nullptr,
1618  break;
1620  TemplateParams.push_back(DBuilder.createTemplateParameterPack(
1621  TheCU, Name, nullptr,
1622  CollectTemplateParams(nullptr, TA.getPackAsArray(), Unit)));
1623  break;
1625  const Expr *E = TA.getAsExpr();
1626  QualType T = E->getType();
1627  if (E->isGLValue())
1628  T = CGM.getContext().getLValueReferenceType(T);
1629  llvm::Constant *V = ConstantEmitter(CGM).emitAbstract(E, T);
1630  assert(V && "Expression in template argument isn't constant");
1631  llvm::DIType *TTy = getOrCreateType(T, Unit);
1632  TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1633  TheCU, Name, TTy, V->stripPointerCasts()));
1634  } break;
1635  // And the following should never occur:
1638  llvm_unreachable(
1639  "These argument types shouldn't exist in concrete types");
1640  }
1641  }
1642  return DBuilder.getOrCreateArray(TemplateParams);
1643 }
1644 
1645 llvm::DINodeArray
1646 CGDebugInfo::CollectFunctionTemplateParams(const FunctionDecl *FD,
1647  llvm::DIFile *Unit) {
1648  if (FD->getTemplatedKind() ==
1651  ->getTemplate()
1653  return CollectTemplateParams(
1654  TList, FD->getTemplateSpecializationArgs()->asArray(), Unit);
1655  }
1656  return llvm::DINodeArray();
1657 }
1658 
1659 llvm::DINodeArray CGDebugInfo::CollectCXXTemplateParams(
1660  const ClassTemplateSpecializationDecl *TSpecial, llvm::DIFile *Unit) {
1661  // Always get the full list of parameters, not just the ones from
1662  // the specialization.
1663  TemplateParameterList *TPList =
1665  const TemplateArgumentList &TAList = TSpecial->getTemplateArgs();
1666  return CollectTemplateParams(TPList, TAList.asArray(), Unit);
1667 }
1668 
1669 llvm::DIType *CGDebugInfo::getOrCreateVTablePtrType(llvm::DIFile *Unit) {
1670  if (VTablePtrType)
1671  return VTablePtrType;
1672 
1673  ASTContext &Context = CGM.getContext();
1674 
1675  /* Function type */
1676  llvm::Metadata *STy = getOrCreateType(Context.IntTy, Unit);
1677  llvm::DITypeRefArray SElements = DBuilder.getOrCreateTypeArray(STy);
1678  llvm::DIType *SubTy = DBuilder.createSubroutineType(SElements);
1679  unsigned Size = Context.getTypeSize(Context.VoidPtrTy);
1680  unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace();
1681  Optional<unsigned> DWARFAddressSpace =
1682  CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace);
1683 
1684  llvm::DIType *vtbl_ptr_type =
1685  DBuilder.createPointerType(SubTy, Size, 0, DWARFAddressSpace,
1686  "__vtbl_ptr_type");
1687  VTablePtrType = DBuilder.createPointerType(vtbl_ptr_type, Size);
1688  return VTablePtrType;
1689 }
1690 
1691 StringRef CGDebugInfo::getVTableName(const CXXRecordDecl *RD) {
1692  // Copy the gdb compatible name on the side and use its reference.
1693  return internString("_vptr$", RD->getNameAsString());
1694 }
1695 
1696 void CGDebugInfo::CollectVTableInfo(const CXXRecordDecl *RD, llvm::DIFile *Unit,
1698  llvm::DICompositeType *RecordTy) {
1699  // If this class is not dynamic then there is not any vtable info to collect.
1700  if (!RD->isDynamicClass())
1701  return;
1702 
1703  // Don't emit any vtable shape or vptr info if this class doesn't have an
1704  // extendable vfptr. This can happen if the class doesn't have virtual
1705  // methods, or in the MS ABI if those virtual methods only come from virtually
1706  // inherited bases.
1707  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
1708  if (!RL.hasExtendableVFPtr())
1709  return;
1710 
1711  // CodeView needs to know how large the vtable of every dynamic class is, so
1712  // emit a special named pointer type into the element list. The vptr type
1713  // points to this type as well.
1714  llvm::DIType *VPtrTy = nullptr;
1715  bool NeedVTableShape = CGM.getCodeGenOpts().EmitCodeView &&
1716  CGM.getTarget().getCXXABI().isMicrosoft();
1717  if (NeedVTableShape) {
1718  uint64_t PtrWidth =
1719  CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
1720  const VTableLayout &VFTLayout =
1721  CGM.getMicrosoftVTableContext().getVFTableLayout(RD, CharUnits::Zero());
1722  unsigned VSlotCount =
1723  VFTLayout.vtable_components().size() - CGM.getLangOpts().RTTIData;
1724  unsigned VTableWidth = PtrWidth * VSlotCount;
1725  unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace();
1726  Optional<unsigned> DWARFAddressSpace =
1727  CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace);
1728 
1729  // Create a very wide void* type and insert it directly in the element list.
1730  llvm::DIType *VTableType =
1731  DBuilder.createPointerType(nullptr, VTableWidth, 0, DWARFAddressSpace,
1732  "__vtbl_ptr_type");
1733  EltTys.push_back(VTableType);
1734 
1735  // The vptr is a pointer to this special vtable type.
1736  VPtrTy = DBuilder.createPointerType(VTableType, PtrWidth);
1737  }
1738 
1739  // If there is a primary base then the artificial vptr member lives there.
1740  if (RL.getPrimaryBase())
1741  return;
1742 
1743  if (!VPtrTy)
1744  VPtrTy = getOrCreateVTablePtrType(Unit);
1745 
1746  unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
1747  llvm::DIType *VPtrMember = DBuilder.createMemberType(
1748  Unit, getVTableName(RD), Unit, 0, Size, 0, 0,
1749  llvm::DINode::FlagArtificial, VPtrTy);
1750  EltTys.push_back(VPtrMember);
1751 }
1752 
1754  SourceLocation Loc) {
1755  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
1756  llvm::DIType *T = getOrCreateType(RTy, getOrCreateFile(Loc));
1757  return T;
1758 }
1759 
1761  SourceLocation Loc) {
1762  return getOrCreateStandaloneType(D, Loc);
1763 }
1764 
1766  SourceLocation Loc) {
1767  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
1768  assert(!D.isNull() && "null type");
1769  llvm::DIType *T = getOrCreateType(D, getOrCreateFile(Loc));
1770  assert(T && "could not create debug info for type");
1771 
1772  RetainedTypes.push_back(D.getAsOpaquePtr());
1773  return T;
1774 }
1775 
1777  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
1778  return;
1779  QualType Ty = CGM.getContext().getEnumType(ED);
1780  void *TyPtr = Ty.getAsOpaquePtr();
1781  auto I = TypeCache.find(TyPtr);
1782  if (I == TypeCache.end() || !cast<llvm::DIType>(I->second)->isForwardDecl())
1783  return;
1784  llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<EnumType>());
1785  assert(!Res->isForwardDecl());
1786  TypeCache[TyPtr].reset(Res);
1787 }
1788 
1790  if (DebugKind > codegenoptions::LimitedDebugInfo ||
1791  !CGM.getLangOpts().CPlusPlus)
1792  completeRequiredType(RD);
1793 }
1794 
1795 /// Return true if the class or any of its methods are marked dllimport.
1796 static bool isClassOrMethodDLLImport(const CXXRecordDecl *RD) {
1797  if (RD->hasAttr<DLLImportAttr>())
1798  return true;
1799  for (const CXXMethodDecl *MD : RD->methods())
1800  if (MD->hasAttr<DLLImportAttr>())
1801  return true;
1802  return false;
1803 }
1804 
1805 /// Does a type definition exist in an imported clang module?
1806 static bool isDefinedInClangModule(const RecordDecl *RD) {
1807  // Only definitions that where imported from an AST file come from a module.
1808  if (!RD || !RD->isFromASTFile())
1809  return false;
1810  // Anonymous entities cannot be addressed. Treat them as not from module.
1811  if (!RD->isExternallyVisible() && RD->getName().empty())
1812  return false;
1813  if (auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) {
1814  if (!CXXDecl->isCompleteDefinition())
1815  return false;
1816  auto TemplateKind = CXXDecl->getTemplateSpecializationKind();
1817  if (TemplateKind != TSK_Undeclared) {
1818  // This is a template, check the origin of the first member.
1819  if (CXXDecl->field_begin() == CXXDecl->field_end())
1820  return TemplateKind == TSK_ExplicitInstantiationDeclaration;
1821  if (!CXXDecl->field_begin()->isFromASTFile())
1822  return false;
1823  }
1824  }
1825  return true;
1826 }
1827 
1829  if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD))
1830  if (CXXRD->isDynamicClass() &&
1831  CGM.getVTableLinkage(CXXRD) ==
1832  llvm::GlobalValue::AvailableExternallyLinkage &&
1833  !isClassOrMethodDLLImport(CXXRD))
1834  return;
1835 
1836  if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition()))
1837  return;
1838 
1839  completeClass(RD);
1840 }
1841 
1843  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
1844  return;
1845  QualType Ty = CGM.getContext().getRecordType(RD);
1846  void *TyPtr = Ty.getAsOpaquePtr();
1847  auto I = TypeCache.find(TyPtr);
1848  if (I != TypeCache.end() && !cast<llvm::DIType>(I->second)->isForwardDecl())
1849  return;
1850  llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<RecordType>());
1851  assert(!Res->isForwardDecl());
1852  TypeCache[TyPtr].reset(Res);
1853 }
1854 
1857  for (CXXMethodDecl *MD : llvm::make_range(I, End))
1859  if (!Tmpl->isImplicit() && Tmpl->isThisDeclarationADefinition() &&
1860  !MD->getMemberSpecializationInfo()->isExplicitSpecialization())
1861  return true;
1862  return false;
1863 }
1864 
1866  bool DebugTypeExtRefs, const RecordDecl *RD,
1867  const LangOptions &LangOpts) {
1868  if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition()))
1869  return true;
1870 
1871  if (auto *ES = RD->getASTContext().getExternalSource())
1872  if (ES->hasExternalDefinitions(RD) == ExternalASTSource::EK_Always)
1873  return true;
1874 
1875  if (DebugKind > codegenoptions::LimitedDebugInfo)
1876  return false;
1877 
1878  if (!LangOpts.CPlusPlus)
1879  return false;
1880 
1881  if (!RD->isCompleteDefinitionRequired())
1882  return true;
1883 
1884  const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
1885 
1886  if (!CXXDecl)
1887  return false;
1888 
1889  // Only emit complete debug info for a dynamic class when its vtable is
1890  // emitted. However, Microsoft debuggers don't resolve type information
1891  // across DLL boundaries, so skip this optimization if the class or any of its
1892  // methods are marked dllimport. This isn't a complete solution, since objects
1893  // without any dllimport methods can be used in one DLL and constructed in
1894  // another, but it is the current behavior of LimitedDebugInfo.
1895  if (CXXDecl->hasDefinition() && CXXDecl->isDynamicClass() &&
1896  !isClassOrMethodDLLImport(CXXDecl))
1897  return true;
1898 
1900  if (const auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD))
1901  Spec = SD->getSpecializationKind();
1902 
1905  CXXDecl->method_end()))
1906  return true;
1907 
1908  return false;
1909 }
1910 
1912  if (shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, CGM.getLangOpts()))
1913  return;
1914 
1915  QualType Ty = CGM.getContext().getRecordType(RD);
1916  llvm::DIType *T = getTypeOrNull(Ty);
1917  if (T && T->isForwardDecl())
1918  completeClassData(RD);
1919 }
1920 
1921 llvm::DIType *CGDebugInfo::CreateType(const RecordType *Ty) {
1922  RecordDecl *RD = Ty->getDecl();
1923  llvm::DIType *T = cast_or_null<llvm::DIType>(getTypeOrNull(QualType(Ty, 0)));
1924  if (T || shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD,
1925  CGM.getLangOpts())) {
1926  if (!T)
1927  T = getOrCreateRecordFwdDecl(Ty, getDeclContextDescriptor(RD));
1928  return T;
1929  }
1930 
1931  return CreateTypeDefinition(Ty);
1932 }
1933 
1934 llvm::DIType *CGDebugInfo::CreateTypeDefinition(const RecordType *Ty) {
1935  RecordDecl *RD = Ty->getDecl();
1936 
1937  // Get overall information about the record type for the debug info.
1938  llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
1939 
1940  // Records and classes and unions can all be recursive. To handle them, we
1941  // first generate a debug descriptor for the struct as a forward declaration.
1942  // Then (if it is a definition) we go through and get debug info for all of
1943  // its members. Finally, we create a descriptor for the complete type (which
1944  // may refer to the forward decl if the struct is recursive) and replace all
1945  // uses of the forward declaration with the final definition.
1946  llvm::DICompositeType *FwdDecl = getOrCreateLimitedType(Ty, DefUnit);
1947 
1948  const RecordDecl *D = RD->getDefinition();
1949  if (!D || !D->isCompleteDefinition())
1950  return FwdDecl;
1951 
1952  if (const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD))
1953  CollectContainingType(CXXDecl, FwdDecl);
1954 
1955  // Push the struct on region stack.
1956  LexicalBlockStack.emplace_back(&*FwdDecl);
1957  RegionMap[Ty->getDecl()].reset(FwdDecl);
1958 
1959  // Convert all the elements.
1961  // what about nested types?
1962 
1963  // Note: The split of CXXDecl information here is intentional, the
1964  // gdb tests will depend on a certain ordering at printout. The debug
1965  // information offsets are still correct if we merge them all together
1966  // though.
1967  const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
1968  if (CXXDecl) {
1969  CollectCXXBases(CXXDecl, DefUnit, EltTys, FwdDecl);
1970  CollectVTableInfo(CXXDecl, DefUnit, EltTys, FwdDecl);
1971  }
1972 
1973  // Collect data fields (including static variables and any initializers).
1974  CollectRecordFields(RD, DefUnit, EltTys, FwdDecl);
1975  if (CXXDecl)
1976  CollectCXXMemberFunctions(CXXDecl, DefUnit, EltTys, FwdDecl);
1977 
1978  LexicalBlockStack.pop_back();
1979  RegionMap.erase(Ty->getDecl());
1980 
1981  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
1982  DBuilder.replaceArrays(FwdDecl, Elements);
1983 
1984  if (FwdDecl->isTemporary())
1985  FwdDecl =
1986  llvm::MDNode::replaceWithPermanent(llvm::TempDICompositeType(FwdDecl));
1987 
1988  RegionMap[Ty->getDecl()].reset(FwdDecl);
1989  return FwdDecl;
1990 }
1991 
1992 llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectType *Ty,
1993  llvm::DIFile *Unit) {
1994  // Ignore protocols.
1995  return getOrCreateType(Ty->getBaseType(), Unit);
1996 }
1997 
1998 llvm::DIType *CGDebugInfo::CreateType(const ObjCTypeParamType *Ty,
1999  llvm::DIFile *Unit) {
2000  // Ignore protocols.
2001  SourceLocation Loc = Ty->getDecl()->getLocation();
2002 
2003  // Use Typedefs to represent ObjCTypeParamType.
2004  return DBuilder.createTypedef(
2005  getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit),
2006  Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc),
2007  getDeclContextDescriptor(Ty->getDecl()));
2008 }
2009 
2010 /// \return true if Getter has the default name for the property PD.
2012  const ObjCMethodDecl *Getter) {
2013  assert(PD);
2014  if (!Getter)
2015  return true;
2016 
2017  assert(Getter->getDeclName().isObjCZeroArgSelector());
2018  return PD->getName() ==
2020 }
2021 
2022 /// \return true if Setter has the default name for the property PD.
2024  const ObjCMethodDecl *Setter) {
2025  assert(PD);
2026  if (!Setter)
2027  return true;
2028 
2029  assert(Setter->getDeclName().isObjCOneArgSelector());
2032 }
2033 
2034 llvm::DIType *CGDebugInfo::CreateType(const ObjCInterfaceType *Ty,
2035  llvm::DIFile *Unit) {
2036  ObjCInterfaceDecl *ID = Ty->getDecl();
2037  if (!ID)
2038  return nullptr;
2039 
2040  // Return a forward declaration if this type was imported from a clang module,
2041  // and this is not the compile unit with the implementation of the type (which
2042  // may contain hidden ivars).
2043  if (DebugTypeExtRefs && ID->isFromASTFile() && ID->getDefinition() &&
2044  !ID->getImplementation())
2045  return DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
2046  ID->getName(),
2047  getDeclContextDescriptor(ID), Unit, 0);
2048 
2049  // Get overall information about the record type for the debug info.
2050  llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation());
2051  unsigned Line = getLineNumber(ID->getLocation());
2052  auto RuntimeLang =
2053  static_cast<llvm::dwarf::SourceLanguage>(TheCU->getSourceLanguage());
2054 
2055  // If this is just a forward declaration return a special forward-declaration
2056  // debug type since we won't be able to lay out the entire type.
2057  ObjCInterfaceDecl *Def = ID->getDefinition();
2058  if (!Def || !Def->getImplementation()) {
2059  llvm::DIScope *Mod = getParentModuleOrNull(ID);
2060  llvm::DIType *FwdDecl = DBuilder.createReplaceableCompositeType(
2061  llvm::dwarf::DW_TAG_structure_type, ID->getName(), Mod ? Mod : TheCU,
2062  DefUnit, Line, RuntimeLang);
2063  ObjCInterfaceCache.push_back(ObjCInterfaceCacheEntry(Ty, FwdDecl, Unit));
2064  return FwdDecl;
2065  }
2066 
2067  return CreateTypeDefinition(Ty, Unit);
2068 }
2069 
2070 llvm::DIModule *
2071 CGDebugInfo::getOrCreateModuleRef(ExternalASTSource::ASTSourceDescriptor Mod,
2072  bool CreateSkeletonCU) {
2073  // Use the Module pointer as the key into the cache. This is a
2074  // nullptr if the "Module" is a PCH, which is safe because we don't
2075  // support chained PCH debug info, so there can only be a single PCH.
2076  const Module *M = Mod.getModuleOrNull();
2077  auto ModRef = ModuleCache.find(M);
2078  if (ModRef != ModuleCache.end())
2079  return cast<llvm::DIModule>(ModRef->second);
2080 
2081  // Macro definitions that were defined with "-D" on the command line.
2082  SmallString<128> ConfigMacros;
2083  {
2084  llvm::raw_svector_ostream OS(ConfigMacros);
2085  const auto &PPOpts = CGM.getPreprocessorOpts();
2086  unsigned I = 0;
2087  // Translate the macro definitions back into a commmand line.
2088  for (auto &M : PPOpts.Macros) {
2089  if (++I > 1)
2090  OS << " ";
2091  const std::string &Macro = M.first;
2092  bool Undef = M.second;
2093  OS << "\"-" << (Undef ? 'U' : 'D');
2094  for (char c : Macro)
2095  switch (c) {
2096  case '\\' : OS << "\\\\"; break;
2097  case '"' : OS << "\\\""; break;
2098  default: OS << c;
2099  }
2100  OS << '\"';
2101  }
2102  }
2103 
2104  bool IsRootModule = M ? !M->Parent : true;
2105  if (CreateSkeletonCU && IsRootModule) {
2106  // PCH files don't have a signature field in the control block,
2107  // but LLVM detects skeleton CUs by looking for a non-zero DWO id.
2108  // We use the lower 64 bits for debug info.
2109  uint64_t Signature =
2110  Mod.getSignature()
2111  ? (uint64_t)Mod.getSignature()[1] << 32 | Mod.getSignature()[0]
2112  : ~1ULL;
2113  llvm::DIBuilder DIB(CGM.getModule());
2114  DIB.createCompileUnit(TheCU->getSourceLanguage(),
2115  DIB.createFile(Mod.getModuleName(), Mod.getPath()),
2116  TheCU->getProducer(), true, StringRef(), 0,
2117  Mod.getASTFile(), llvm::DICompileUnit::FullDebug,
2118  Signature);
2119  DIB.finalize();
2120  }
2121  llvm::DIModule *Parent =
2122  IsRootModule ? nullptr
2123  : getOrCreateModuleRef(
2125  CreateSkeletonCU);
2126  llvm::DIModule *DIMod =
2127  DBuilder.createModule(Parent, Mod.getModuleName(), ConfigMacros,
2128  Mod.getPath(), CGM.getHeaderSearchOpts().Sysroot);
2129  ModuleCache[M].reset(DIMod);
2130  return DIMod;
2131 }
2132 
2133 llvm::DIType *CGDebugInfo::CreateTypeDefinition(const ObjCInterfaceType *Ty,
2134  llvm::DIFile *Unit) {
2135  ObjCInterfaceDecl *ID = Ty->getDecl();
2136  llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation());
2137  unsigned Line = getLineNumber(ID->getLocation());
2138  unsigned RuntimeLang = TheCU->getSourceLanguage();
2139 
2140  // Bit size, align and offset of the type.
2141  uint64_t Size = CGM.getContext().getTypeSize(Ty);
2142  auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2143 
2144  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2145  if (ID->getImplementation())
2146  Flags |= llvm::DINode::FlagObjcClassComplete;
2147 
2148  llvm::DIScope *Mod = getParentModuleOrNull(ID);
2149  llvm::DICompositeType *RealDecl = DBuilder.createStructType(
2150  Mod ? Mod : Unit, ID->getName(), DefUnit, Line, Size, Align, Flags,
2151  nullptr, llvm::DINodeArray(), RuntimeLang);
2152 
2153  QualType QTy(Ty, 0);
2154  TypeCache[QTy.getAsOpaquePtr()].reset(RealDecl);
2155 
2156  // Push the struct on region stack.
2157  LexicalBlockStack.emplace_back(RealDecl);
2158  RegionMap[Ty->getDecl()].reset(RealDecl);
2159 
2160  // Convert all the elements.
2162 
2163  ObjCInterfaceDecl *SClass = ID->getSuperClass();
2164  if (SClass) {
2165  llvm::DIType *SClassTy =
2166  getOrCreateType(CGM.getContext().getObjCInterfaceType(SClass), Unit);
2167  if (!SClassTy)
2168  return nullptr;
2169 
2170  llvm::DIType *InhTag = DBuilder.createInheritance(RealDecl, SClassTy, 0,
2171  llvm::DINode::FlagZero);
2172  EltTys.push_back(InhTag);
2173  }
2174 
2175  // Create entries for all of the properties.
2176  auto AddProperty = [&](const ObjCPropertyDecl *PD) {
2177  SourceLocation Loc = PD->getLocation();
2178  llvm::DIFile *PUnit = getOrCreateFile(Loc);
2179  unsigned PLine = getLineNumber(Loc);
2180  ObjCMethodDecl *Getter = PD->getGetterMethodDecl();
2181  ObjCMethodDecl *Setter = PD->getSetterMethodDecl();
2182  llvm::MDNode *PropertyNode = DBuilder.createObjCProperty(
2183  PD->getName(), PUnit, PLine,
2184  hasDefaultGetterName(PD, Getter) ? ""
2185  : getSelectorName(PD->getGetterName()),
2186  hasDefaultSetterName(PD, Setter) ? ""
2187  : getSelectorName(PD->getSetterName()),
2188  PD->getPropertyAttributes(), getOrCreateType(PD->getType(), PUnit));
2189  EltTys.push_back(PropertyNode);
2190  };
2191  {
2192  llvm::SmallPtrSet<const IdentifierInfo*, 16> PropertySet;
2193  for (const ObjCCategoryDecl *ClassExt : ID->known_extensions())
2194  for (auto *PD : ClassExt->properties()) {
2195  PropertySet.insert(PD->getIdentifier());
2196  AddProperty(PD);
2197  }
2198  for (const auto *PD : ID->properties()) {
2199  // Don't emit duplicate metadata for properties that were already in a
2200  // class extension.
2201  if (!PropertySet.insert(PD->getIdentifier()).second)
2202  continue;
2203  AddProperty(PD);
2204  }
2205  }
2206 
2207  const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID);
2208  unsigned FieldNo = 0;
2209  for (ObjCIvarDecl *Field = ID->all_declared_ivar_begin(); Field;
2210  Field = Field->getNextIvar(), ++FieldNo) {
2211  llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
2212  if (!FieldTy)
2213  return nullptr;
2214 
2215  StringRef FieldName = Field->getName();
2216 
2217  // Ignore unnamed fields.
2218  if (FieldName.empty())
2219  continue;
2220 
2221  // Get the location for the field.
2222  llvm::DIFile *FieldDefUnit = getOrCreateFile(Field->getLocation());
2223  unsigned FieldLine = getLineNumber(Field->getLocation());
2224  QualType FType = Field->getType();
2225  uint64_t FieldSize = 0;
2226  uint32_t FieldAlign = 0;
2227 
2228  if (!FType->isIncompleteArrayType()) {
2229 
2230  // Bit size, align and offset of the type.
2231  FieldSize = Field->isBitField()
2232  ? Field->getBitWidthValue(CGM.getContext())
2233  : CGM.getContext().getTypeSize(FType);
2234  FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext());
2235  }
2236 
2237  uint64_t FieldOffset;
2238  if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) {
2239  // We don't know the runtime offset of an ivar if we're using the
2240  // non-fragile ABI. For bitfields, use the bit offset into the first
2241  // byte of storage of the bitfield. For other fields, use zero.
2242  if (Field->isBitField()) {
2243  FieldOffset =
2244  CGM.getObjCRuntime().ComputeBitfieldBitOffset(CGM, ID, Field);
2245  FieldOffset %= CGM.getContext().getCharWidth();
2246  } else {
2247  FieldOffset = 0;
2248  }
2249  } else {
2250  FieldOffset = RL.getFieldOffset(FieldNo);
2251  }
2252 
2253  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2254  if (Field->getAccessControl() == ObjCIvarDecl::Protected)
2255  Flags = llvm::DINode::FlagProtected;
2256  else if (Field->getAccessControl() == ObjCIvarDecl::Private)
2257  Flags = llvm::DINode::FlagPrivate;
2258  else if (Field->getAccessControl() == ObjCIvarDecl::Public)
2259  Flags = llvm::DINode::FlagPublic;
2260 
2261  llvm::MDNode *PropertyNode = nullptr;
2262  if (ObjCImplementationDecl *ImpD = ID->getImplementation()) {
2263  if (ObjCPropertyImplDecl *PImpD =
2264  ImpD->FindPropertyImplIvarDecl(Field->getIdentifier())) {
2265  if (ObjCPropertyDecl *PD = PImpD->getPropertyDecl()) {
2266  SourceLocation Loc = PD->getLocation();
2267  llvm::DIFile *PUnit = getOrCreateFile(Loc);
2268  unsigned PLine = getLineNumber(Loc);
2269  ObjCMethodDecl *Getter = PD->getGetterMethodDecl();
2270  ObjCMethodDecl *Setter = PD->getSetterMethodDecl();
2271  PropertyNode = DBuilder.createObjCProperty(
2272  PD->getName(), PUnit, PLine,
2273  hasDefaultGetterName(PD, Getter) ? "" : getSelectorName(
2274  PD->getGetterName()),
2275  hasDefaultSetterName(PD, Setter) ? "" : getSelectorName(
2276  PD->getSetterName()),
2277  PD->getPropertyAttributes(),
2278  getOrCreateType(PD->getType(), PUnit));
2279  }
2280  }
2281  }
2282  FieldTy = DBuilder.createObjCIVar(FieldName, FieldDefUnit, FieldLine,
2283  FieldSize, FieldAlign, FieldOffset, Flags,
2284  FieldTy, PropertyNode);
2285  EltTys.push_back(FieldTy);
2286  }
2287 
2288  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
2289  DBuilder.replaceArrays(RealDecl, Elements);
2290 
2291  LexicalBlockStack.pop_back();
2292  return RealDecl;
2293 }
2294 
2295 llvm::DIType *CGDebugInfo::CreateType(const VectorType *Ty,
2296  llvm::DIFile *Unit) {
2297  llvm::DIType *ElementTy = getOrCreateType(Ty->getElementType(), Unit);
2298  int64_t Count = Ty->getNumElements();
2299 
2300  llvm::Metadata *Subscript;
2301  QualType QTy(Ty, 0);
2302  auto SizeExpr = SizeExprCache.find(QTy);
2303  if (SizeExpr != SizeExprCache.end())
2304  Subscript = DBuilder.getOrCreateSubrange(0, SizeExpr->getSecond());
2305  else
2306  Subscript = DBuilder.getOrCreateSubrange(0, Count ? Count : -1);
2307  llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscript);
2308 
2309  uint64_t Size = CGM.getContext().getTypeSize(Ty);
2310  auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2311 
2312  return DBuilder.createVectorType(Size, Align, ElementTy, SubscriptArray);
2313 }
2314 
2315 llvm::DIType *CGDebugInfo::CreateType(const ArrayType *Ty, llvm::DIFile *Unit) {
2316  uint64_t Size;
2317  uint32_t Align;
2318 
2319  // FIXME: make getTypeAlign() aware of VLAs and incomplete array types
2320  if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) {
2321  Size = 0;
2322  Align = getTypeAlignIfRequired(CGM.getContext().getBaseElementType(VAT),
2323  CGM.getContext());
2324  } else if (Ty->isIncompleteArrayType()) {
2325  Size = 0;
2326  if (Ty->getElementType()->isIncompleteType())
2327  Align = 0;
2328  else
2329  Align = getTypeAlignIfRequired(Ty->getElementType(), CGM.getContext());
2330  } else if (Ty->isIncompleteType()) {
2331  Size = 0;
2332  Align = 0;
2333  } else {
2334  // Size and align of the whole array, not the element type.
2335  Size = CGM.getContext().getTypeSize(Ty);
2336  Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2337  }
2338 
2339  // Add the dimensions of the array. FIXME: This loses CV qualifiers from
2340  // interior arrays, do we care? Why aren't nested arrays represented the
2341  // obvious/recursive way?
2343  QualType EltTy(Ty, 0);
2344  while ((Ty = dyn_cast<ArrayType>(EltTy))) {
2345  // If the number of elements is known, then count is that number. Otherwise,
2346  // it's -1. This allows us to represent a subrange with an array of 0
2347  // elements, like this:
2348  //
2349  // struct foo {
2350  // int x[0];
2351  // };
2352  int64_t Count = -1; // Count == -1 is an unbounded array.
2353  if (const auto *CAT = dyn_cast<ConstantArrayType>(Ty))
2354  Count = CAT->getSize().getZExtValue();
2355  else if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) {
2356  if (Expr *Size = VAT->getSizeExpr()) {
2357  llvm::APSInt V;
2358  if (Size->EvaluateAsInt(V, CGM.getContext()))
2359  Count = V.getExtValue();
2360  }
2361  }
2362 
2363  auto SizeNode = SizeExprCache.find(EltTy);
2364  if (SizeNode != SizeExprCache.end())
2365  Subscripts.push_back(
2366  DBuilder.getOrCreateSubrange(0, SizeNode->getSecond()));
2367  else
2368  Subscripts.push_back(DBuilder.getOrCreateSubrange(0, Count));
2369  EltTy = Ty->getElementType();
2370  }
2371 
2372  llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscripts);
2373 
2374  return DBuilder.createArrayType(Size, Align, getOrCreateType(EltTy, Unit),
2375  SubscriptArray);
2376 }
2377 
2378 llvm::DIType *CGDebugInfo::CreateType(const LValueReferenceType *Ty,
2379  llvm::DIFile *Unit) {
2380  return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type, Ty,
2381  Ty->getPointeeType(), Unit);
2382 }
2383 
2384 llvm::DIType *CGDebugInfo::CreateType(const RValueReferenceType *Ty,
2385  llvm::DIFile *Unit) {
2386  return CreatePointerLikeType(llvm::dwarf::DW_TAG_rvalue_reference_type, Ty,
2387  Ty->getPointeeType(), Unit);
2388 }
2389 
2390 llvm::DIType *CGDebugInfo::CreateType(const MemberPointerType *Ty,
2391  llvm::DIFile *U) {
2392  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2393  uint64_t Size = 0;
2394 
2395  if (!Ty->isIncompleteType()) {
2396  Size = CGM.getContext().getTypeSize(Ty);
2397 
2398  // Set the MS inheritance model. There is no flag for the unspecified model.
2399  if (CGM.getTarget().getCXXABI().isMicrosoft()) {
2401  case MSInheritanceAttr::Keyword_single_inheritance:
2402  Flags |= llvm::DINode::FlagSingleInheritance;
2403  break;
2404  case MSInheritanceAttr::Keyword_multiple_inheritance:
2405  Flags |= llvm::DINode::FlagMultipleInheritance;
2406  break;
2407  case MSInheritanceAttr::Keyword_virtual_inheritance:
2408  Flags |= llvm::DINode::FlagVirtualInheritance;
2409  break;
2410  case MSInheritanceAttr::Keyword_unspecified_inheritance:
2411  break;
2412  }
2413  }
2414  }
2415 
2416  llvm::DIType *ClassType = getOrCreateType(QualType(Ty->getClass(), 0), U);
2417  if (Ty->isMemberDataPointerType())
2418  return DBuilder.createMemberPointerType(
2419  getOrCreateType(Ty->getPointeeType(), U), ClassType, Size, /*Align=*/0,
2420  Flags);
2421 
2422  const FunctionProtoType *FPT =
2424  return DBuilder.createMemberPointerType(
2425  getOrCreateInstanceMethodType(CGM.getContext().getPointerType(QualType(
2426  Ty->getClass(), FPT->getTypeQuals())),
2427  FPT, U),
2428  ClassType, Size, /*Align=*/0, Flags);
2429 }
2430 
2431 llvm::DIType *CGDebugInfo::CreateType(const AtomicType *Ty, llvm::DIFile *U) {
2432  auto *FromTy = getOrCreateType(Ty->getValueType(), U);
2433  return DBuilder.createQualifiedType(llvm::dwarf::DW_TAG_atomic_type, FromTy);
2434 }
2435 
2436 llvm::DIType* CGDebugInfo::CreateType(const PipeType *Ty,
2437  llvm::DIFile *U) {
2438  return getOrCreateType(Ty->getElementType(), U);
2439 }
2440 
2441 llvm::DIType *CGDebugInfo::CreateEnumType(const EnumType *Ty) {
2442  const EnumDecl *ED = Ty->getDecl();
2443 
2444  uint64_t Size = 0;
2445  uint32_t Align = 0;
2446  if (!ED->getTypeForDecl()->isIncompleteType()) {
2447  Size = CGM.getContext().getTypeSize(ED->getTypeForDecl());
2448  Align = getDeclAlignIfRequired(ED, CGM.getContext());
2449  }
2450 
2451  SmallString<256> FullName = getUniqueTagTypeName(Ty, CGM, TheCU);
2452 
2453  bool isImportedFromModule =
2454  DebugTypeExtRefs && ED->isFromASTFile() && ED->getDefinition();
2455 
2456  // If this is just a forward declaration, construct an appropriately
2457  // marked node and just return it.
2458  if (isImportedFromModule || !ED->getDefinition()) {
2459  // Note that it is possible for enums to be created as part of
2460  // their own declcontext. In this case a FwdDecl will be created
2461  // twice. This doesn't cause a problem because both FwdDecls are
2462  // entered into the ReplaceMap: finalize() will replace the first
2463  // FwdDecl with the second and then replace the second with
2464  // complete type.
2465  llvm::DIScope *EDContext = getDeclContextDescriptor(ED);
2466  llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
2467  llvm::TempDIScope TmpContext(DBuilder.createReplaceableCompositeType(
2468  llvm::dwarf::DW_TAG_enumeration_type, "", TheCU, DefUnit, 0));
2469 
2470  unsigned Line = getLineNumber(ED->getLocation());
2471  StringRef EDName = ED->getName();
2472  llvm::DIType *RetTy = DBuilder.createReplaceableCompositeType(
2473  llvm::dwarf::DW_TAG_enumeration_type, EDName, EDContext, DefUnit, Line,
2474  0, Size, Align, llvm::DINode::FlagFwdDecl, FullName);
2475 
2476  ReplaceMap.emplace_back(
2477  std::piecewise_construct, std::make_tuple(Ty),
2478  std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
2479  return RetTy;
2480  }
2481 
2482  return CreateTypeDefinition(Ty);
2483 }
2484 
2485 llvm::DIType *CGDebugInfo::CreateTypeDefinition(const EnumType *Ty) {
2486  const EnumDecl *ED = Ty->getDecl();
2487  uint64_t Size = 0;
2488  uint32_t Align = 0;
2489  if (!ED->getTypeForDecl()->isIncompleteType()) {
2490  Size = CGM.getContext().getTypeSize(ED->getTypeForDecl());
2491  Align = getDeclAlignIfRequired(ED, CGM.getContext());
2492  }
2493 
2494  SmallString<256> FullName = getUniqueTagTypeName(Ty, CGM, TheCU);
2495 
2496  // Create elements for each enumerator.
2498  ED = ED->getDefinition();
2499  bool IsSigned = ED->getIntegerType()->isSignedIntegerType();
2500  for (const auto *Enum : ED->enumerators()) {
2501  const auto &InitVal = Enum->getInitVal();
2502  auto Value = IsSigned ? InitVal.getSExtValue() : InitVal.getZExtValue();
2503  Enumerators.push_back(
2504  DBuilder.createEnumerator(Enum->getName(), Value, !IsSigned));
2505  }
2506 
2507  // Return a CompositeType for the enum itself.
2508  llvm::DINodeArray EltArray = DBuilder.getOrCreateArray(Enumerators);
2509 
2510  llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
2511  unsigned Line = getLineNumber(ED->getLocation());
2512  llvm::DIScope *EnumContext = getDeclContextDescriptor(ED);
2513  llvm::DIType *ClassTy = getOrCreateType(ED->getIntegerType(), DefUnit);
2514  return DBuilder.createEnumerationType(EnumContext, ED->getName(), DefUnit,
2515  Line, Size, Align, EltArray, ClassTy,
2516  FullName, ED->isFixed());
2517 }
2518 
2519 llvm::DIMacro *CGDebugInfo::CreateMacro(llvm::DIMacroFile *Parent,
2520  unsigned MType, SourceLocation LineLoc,
2521  StringRef Name, StringRef Value) {
2522  unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc);
2523  return DBuilder.createMacro(Parent, Line, MType, Name, Value);
2524 }
2525 
2526 llvm::DIMacroFile *CGDebugInfo::CreateTempMacroFile(llvm::DIMacroFile *Parent,
2527  SourceLocation LineLoc,
2528  SourceLocation FileLoc) {
2529  llvm::DIFile *FName = getOrCreateFile(FileLoc);
2530  unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc);
2531  return DBuilder.createTempMacroFile(Parent, Line, FName);
2532 }
2533 
2535  Qualifiers Quals;
2536  do {
2537  Qualifiers InnerQuals = T.getLocalQualifiers();
2538  // Qualifiers::operator+() doesn't like it if you add a Qualifier
2539  // that is already there.
2540  Quals += Qualifiers::removeCommonQualifiers(Quals, InnerQuals);
2541  Quals += InnerQuals;
2542  QualType LastT = T;
2543  switch (T->getTypeClass()) {
2544  default:
2545  return C.getQualifiedType(T.getTypePtr(), Quals);
2546  case Type::TemplateSpecialization: {
2547  const auto *Spec = cast<TemplateSpecializationType>(T);
2548  if (Spec->isTypeAlias())
2549  return C.getQualifiedType(T.getTypePtr(), Quals);
2550  T = Spec->desugar();
2551  break;
2552  }
2553  case Type::TypeOfExpr:
2554  T = cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType();
2555  break;
2556  case Type::TypeOf:
2557  T = cast<TypeOfType>(T)->getUnderlyingType();
2558  break;
2559  case Type::Decltype:
2560  T = cast<DecltypeType>(T)->getUnderlyingType();
2561  break;
2562  case Type::UnaryTransform:
2563  T = cast<UnaryTransformType>(T)->getUnderlyingType();
2564  break;
2565  case Type::Attributed:
2566  T = cast<AttributedType>(T)->getEquivalentType();
2567  break;
2568  case Type::Elaborated:
2569  T = cast<ElaboratedType>(T)->getNamedType();
2570  break;
2571  case Type::Paren:
2572  T = cast<ParenType>(T)->getInnerType();
2573  break;
2574  case Type::SubstTemplateTypeParm:
2575  T = cast<SubstTemplateTypeParmType>(T)->getReplacementType();
2576  break;
2577  case Type::Auto:
2578  case Type::DeducedTemplateSpecialization: {
2579  QualType DT = cast<DeducedType>(T)->getDeducedType();
2580  assert(!DT.isNull() && "Undeduced types shouldn't reach here.");
2581  T = DT;
2582  break;
2583  }
2584  case Type::Adjusted:
2585  case Type::Decayed:
2586  // Decayed and adjusted types use the adjusted type in LLVM and DWARF.
2587  T = cast<AdjustedType>(T)->getAdjustedType();
2588  break;
2589  }
2590 
2591  assert(T != LastT && "Type unwrapping failed to unwrap!");
2592  (void)LastT;
2593  } while (true);
2594 }
2595 
2596 llvm::DIType *CGDebugInfo::getTypeOrNull(QualType Ty) {
2597 
2598  // Unwrap the type as needed for debug information.
2599  Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext());
2600 
2601  auto it = TypeCache.find(Ty.getAsOpaquePtr());
2602  if (it != TypeCache.end()) {
2603  // Verify that the debug info still exists.
2604  if (llvm::Metadata *V = it->second)
2605  return cast<llvm::DIType>(V);
2606  }
2607 
2608  return nullptr;
2609 }
2610 
2612  const ClassTemplateSpecializationDecl &SD) {
2613  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2614  return;
2615  completeUnusedClass(SD);
2616 }
2617 
2619  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2620  return;
2621 
2622  completeClassData(&D);
2623  // In case this type has no member function definitions being emitted, ensure
2624  // it is retained
2625  RetainedTypes.push_back(CGM.getContext().getRecordType(&D).getAsOpaquePtr());
2626 }
2627 
2628 llvm::DIType *CGDebugInfo::getOrCreateType(QualType Ty, llvm::DIFile *Unit) {
2629  if (Ty.isNull())
2630  return nullptr;
2631 
2632  // Unwrap the type as needed for debug information.
2633  Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext());
2634 
2635  if (auto *T = getTypeOrNull(Ty))
2636  return T;
2637 
2638  llvm::DIType *Res = CreateTypeNode(Ty, Unit);
2639  void* TyPtr = Ty.getAsOpaquePtr();
2640 
2641  // And update the type cache.
2642  TypeCache[TyPtr].reset(Res);
2643 
2644  return Res;
2645 }
2646 
2647 llvm::DIModule *CGDebugInfo::getParentModuleOrNull(const Decl *D) {
2648  // A forward declaration inside a module header does not belong to the module.
2649  if (isa<RecordDecl>(D) && !cast<RecordDecl>(D)->getDefinition())
2650  return nullptr;
2651  if (DebugTypeExtRefs && D->isFromASTFile()) {
2652  // Record a reference to an imported clang module or precompiled header.
2653  auto *Reader = CGM.getContext().getExternalSource();
2654  auto Idx = D->getOwningModuleID();
2655  auto Info = Reader->getSourceDescriptor(Idx);
2656  if (Info)
2657  return getOrCreateModuleRef(*Info, /*SkeletonCU=*/true);
2658  } else if (ClangModuleMap) {
2659  // We are building a clang module or a precompiled header.
2660  //
2661  // TODO: When D is a CXXRecordDecl or a C++ Enum, the ODR applies
2662  // and it wouldn't be necessary to specify the parent scope
2663  // because the type is already unique by definition (it would look
2664  // like the output of -fno-standalone-debug). On the other hand,
2665  // the parent scope helps a consumer to quickly locate the object
2666  // file where the type's definition is located, so it might be
2667  // best to make this behavior a command line or debugger tuning
2668  // option.
2669  if (Module *M = D->getOwningModule()) {
2670  // This is a (sub-)module.
2672  return getOrCreateModuleRef(Info, /*SkeletonCU=*/false);
2673  } else {
2674  // This the precompiled header being built.
2675  return getOrCreateModuleRef(PCHDescriptor, /*SkeletonCU=*/false);
2676  }
2677  }
2678 
2679  return nullptr;
2680 }
2681 
2682 llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit) {
2683  // Handle qualifiers, which recursively handles what they refer to.
2684  if (Ty.hasLocalQualifiers())
2685  return CreateQualifiedType(Ty, Unit);
2686 
2687  // Work out details of type.
2688  switch (Ty->getTypeClass()) {
2689 #define TYPE(Class, Base)
2690 #define ABSTRACT_TYPE(Class, Base)
2691 #define NON_CANONICAL_TYPE(Class, Base)
2692 #define DEPENDENT_TYPE(Class, Base) case Type::Class:
2693 #include "clang/AST/TypeNodes.def"
2694  llvm_unreachable("Dependent types cannot show up in debug information");
2695 
2696  case Type::ExtVector:
2697  case Type::Vector:
2698  return CreateType(cast<VectorType>(Ty), Unit);
2699  case Type::ObjCObjectPointer:
2700  return CreateType(cast<ObjCObjectPointerType>(Ty), Unit);
2701  case Type::ObjCObject:
2702  return CreateType(cast<ObjCObjectType>(Ty), Unit);
2703  case Type::ObjCTypeParam:
2704  return CreateType(cast<ObjCTypeParamType>(Ty), Unit);
2705  case Type::ObjCInterface:
2706  return CreateType(cast<ObjCInterfaceType>(Ty), Unit);
2707  case Type::Builtin:
2708  return CreateType(cast<BuiltinType>(Ty));
2709  case Type::Complex:
2710  return CreateType(cast<ComplexType>(Ty));
2711  case Type::Pointer:
2712  return CreateType(cast<PointerType>(Ty), Unit);
2713  case Type::BlockPointer:
2714  return CreateType(cast<BlockPointerType>(Ty), Unit);
2715  case Type::Typedef:
2716  return CreateType(cast<TypedefType>(Ty), Unit);
2717  case Type::Record:
2718  return CreateType(cast<RecordType>(Ty));
2719  case Type::Enum:
2720  return CreateEnumType(cast<EnumType>(Ty));
2721  case Type::FunctionProto:
2722  case Type::FunctionNoProto:
2723  return CreateType(cast<FunctionType>(Ty), Unit);
2724  case Type::ConstantArray:
2725  case Type::VariableArray:
2726  case Type::IncompleteArray:
2727  return CreateType(cast<ArrayType>(Ty), Unit);
2728 
2729  case Type::LValueReference:
2730  return CreateType(cast<LValueReferenceType>(Ty), Unit);
2731  case Type::RValueReference:
2732  return CreateType(cast<RValueReferenceType>(Ty), Unit);
2733 
2734  case Type::MemberPointer:
2735  return CreateType(cast<MemberPointerType>(Ty), Unit);
2736 
2737  case Type::Atomic:
2738  return CreateType(cast<AtomicType>(Ty), Unit);
2739 
2740  case Type::Pipe:
2741  return CreateType(cast<PipeType>(Ty), Unit);
2742 
2743  case Type::TemplateSpecialization:
2744  return CreateType(cast<TemplateSpecializationType>(Ty), Unit);
2745 
2746  case Type::Auto:
2747  case Type::Attributed:
2748  case Type::Adjusted:
2749  case Type::Decayed:
2750  case Type::DeducedTemplateSpecialization:
2751  case Type::Elaborated:
2752  case Type::Paren:
2753  case Type::SubstTemplateTypeParm:
2754  case Type::TypeOfExpr:
2755  case Type::TypeOf:
2756  case Type::Decltype:
2757  case Type::UnaryTransform:
2758  case Type::PackExpansion:
2759  break;
2760  }
2761 
2762  llvm_unreachable("type should have been unwrapped!");
2763 }
2764 
2765 llvm::DICompositeType *CGDebugInfo::getOrCreateLimitedType(const RecordType *Ty,
2766  llvm::DIFile *Unit) {
2767  QualType QTy(Ty, 0);
2768 
2769  auto *T = cast_or_null<llvm::DICompositeType>(getTypeOrNull(QTy));
2770 
2771  // We may have cached a forward decl when we could have created
2772  // a non-forward decl. Go ahead and create a non-forward decl
2773  // now.
2774  if (T && !T->isForwardDecl())
2775  return T;
2776 
2777  // Otherwise create the type.
2778  llvm::DICompositeType *Res = CreateLimitedType(Ty);
2779 
2780  // Propagate members from the declaration to the definition
2781  // CreateType(const RecordType*) will overwrite this with the members in the
2782  // correct order if the full type is needed.
2783  DBuilder.replaceArrays(Res, T ? T->getElements() : llvm::DINodeArray());
2784 
2785  // And update the type cache.
2786  TypeCache[QTy.getAsOpaquePtr()].reset(Res);
2787  return Res;
2788 }
2789 
2790 // TODO: Currently used for context chains when limiting debug info.
2791 llvm::DICompositeType *CGDebugInfo::CreateLimitedType(const RecordType *Ty) {
2792  RecordDecl *RD = Ty->getDecl();
2793 
2794  // Get overall information about the record type for the debug info.
2795  llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
2796  unsigned Line = getLineNumber(RD->getLocation());
2797  StringRef RDName = getClassName(RD);
2798 
2799  llvm::DIScope *RDContext = getDeclContextDescriptor(RD);
2800 
2801  // If we ended up creating the type during the context chain construction,
2802  // just return that.
2803  auto *T = cast_or_null<llvm::DICompositeType>(
2804  getTypeOrNull(CGM.getContext().getRecordType(RD)));
2805  if (T && (!T->isForwardDecl() || !RD->getDefinition()))
2806  return T;
2807 
2808  // If this is just a forward or incomplete declaration, construct an
2809  // appropriately marked node and just return it.
2810  const RecordDecl *D = RD->getDefinition();
2811  if (!D || !D->isCompleteDefinition())
2812  return getOrCreateRecordFwdDecl(Ty, RDContext);
2813 
2814  uint64_t Size = CGM.getContext().getTypeSize(Ty);
2815  auto Align = getDeclAlignIfRequired(D, CGM.getContext());
2816 
2817  SmallString<256> FullName = getUniqueTagTypeName(Ty, CGM, TheCU);
2818 
2819  // Explicitly record the calling convention for C++ records.
2820  auto Flags = llvm::DINode::FlagZero;
2821  if (auto CXXRD = dyn_cast<CXXRecordDecl>(RD)) {
2822  if (CGM.getCXXABI().getRecordArgABI(CXXRD) == CGCXXABI::RAA_Indirect)
2823  Flags |= llvm::DINode::FlagTypePassByReference;
2824  else
2825  Flags |= llvm::DINode::FlagTypePassByValue;
2826  }
2827 
2828  llvm::DICompositeType *RealDecl = DBuilder.createReplaceableCompositeType(
2829  getTagForRecord(RD), RDName, RDContext, DefUnit, Line, 0, Size, Align,
2830  Flags, FullName);
2831 
2832  // Elements of composite types usually have back to the type, creating
2833  // uniquing cycles. Distinct nodes are more efficient.
2834  switch (RealDecl->getTag()) {
2835  default:
2836  llvm_unreachable("invalid composite type tag");
2837 
2838  case llvm::dwarf::DW_TAG_array_type:
2839  case llvm::dwarf::DW_TAG_enumeration_type:
2840  // Array elements and most enumeration elements don't have back references,
2841  // so they don't tend to be involved in uniquing cycles and there is some
2842  // chance of merging them when linking together two modules. Only make
2843  // them distinct if they are ODR-uniqued.
2844  if (FullName.empty())
2845  break;
2846  LLVM_FALLTHROUGH;
2847 
2848  case llvm::dwarf::DW_TAG_structure_type:
2849  case llvm::dwarf::DW_TAG_union_type:
2850  case llvm::dwarf::DW_TAG_class_type:
2851  // Immediatley resolve to a distinct node.
2852  RealDecl =
2853  llvm::MDNode::replaceWithDistinct(llvm::TempDICompositeType(RealDecl));
2854  break;
2855  }
2856 
2857  RegionMap[Ty->getDecl()].reset(RealDecl);
2858  TypeCache[QualType(Ty, 0).getAsOpaquePtr()].reset(RealDecl);
2859 
2860  if (const auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD))
2861  DBuilder.replaceArrays(RealDecl, llvm::DINodeArray(),
2862  CollectCXXTemplateParams(TSpecial, DefUnit));
2863  return RealDecl;
2864 }
2865 
2866 void CGDebugInfo::CollectContainingType(const CXXRecordDecl *RD,
2867  llvm::DICompositeType *RealDecl) {
2868  // A class's primary base or the class itself contains the vtable.
2869  llvm::DICompositeType *ContainingType = nullptr;
2870  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
2871  if (const CXXRecordDecl *PBase = RL.getPrimaryBase()) {
2872  // Seek non-virtual primary base root.
2873  while (1) {
2874  const ASTRecordLayout &BRL = CGM.getContext().getASTRecordLayout(PBase);
2875  const CXXRecordDecl *PBT = BRL.getPrimaryBase();
2876  if (PBT && !BRL.isPrimaryBaseVirtual())
2877  PBase = PBT;
2878  else
2879  break;
2880  }
2881  ContainingType = cast<llvm::DICompositeType>(
2882  getOrCreateType(QualType(PBase->getTypeForDecl(), 0),
2883  getOrCreateFile(RD->getLocation())));
2884  } else if (RD->isDynamicClass())
2885  ContainingType = RealDecl;
2886 
2887  DBuilder.replaceVTableHolder(RealDecl, ContainingType);
2888 }
2889 
2890 llvm::DIType *CGDebugInfo::CreateMemberType(llvm::DIFile *Unit, QualType FType,
2891  StringRef Name, uint64_t *Offset) {
2892  llvm::DIType *FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
2893  uint64_t FieldSize = CGM.getContext().getTypeSize(FType);
2894  auto FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext());
2895  llvm::DIType *Ty =
2896  DBuilder.createMemberType(Unit, Name, Unit, 0, FieldSize, FieldAlign,
2897  *Offset, llvm::DINode::FlagZero, FieldTy);
2898  *Offset += FieldSize;
2899  return Ty;
2900 }
2901 
2902 void CGDebugInfo::collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit,
2903  StringRef &Name,
2904  StringRef &LinkageName,
2905  llvm::DIScope *&FDContext,
2906  llvm::DINodeArray &TParamsArray,
2907  llvm::DINode::DIFlags &Flags) {
2908  const auto *FD = cast<FunctionDecl>(GD.getDecl());
2909  Name = getFunctionName(FD);
2910  // Use mangled name as linkage name for C/C++ functions.
2911  if (FD->hasPrototype()) {
2912  LinkageName = CGM.getMangledName(GD);
2913  Flags |= llvm::DINode::FlagPrototyped;
2914  }
2915  // No need to replicate the linkage name if it isn't different from the
2916  // subprogram name, no need to have it at all unless coverage is enabled or
2917  // debug is set to more than just line tables or extra debug info is needed.
2918  if (LinkageName == Name || (!CGM.getCodeGenOpts().EmitGcovArcs &&
2919  !CGM.getCodeGenOpts().EmitGcovNotes &&
2920  !CGM.getCodeGenOpts().DebugInfoForProfiling &&
2922  LinkageName = StringRef();
2923 
2924  if (DebugKind >= codegenoptions::LimitedDebugInfo) {
2925  if (const NamespaceDecl *NSDecl =
2926  dyn_cast_or_null<NamespaceDecl>(FD->getDeclContext()))
2927  FDContext = getOrCreateNamespace(NSDecl);
2928  else if (const RecordDecl *RDecl =
2929  dyn_cast_or_null<RecordDecl>(FD->getDeclContext())) {
2930  llvm::DIScope *Mod = getParentModuleOrNull(RDecl);
2931  FDContext = getContextDescriptor(RDecl, Mod ? Mod : TheCU);
2932  }
2933  // Check if it is a noreturn-marked function
2934  if (FD->isNoReturn())
2935  Flags |= llvm::DINode::FlagNoReturn;
2936  // Collect template parameters.
2937  TParamsArray = CollectFunctionTemplateParams(FD, Unit);
2938  }
2939 }
2940 
2941 void CGDebugInfo::collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit,
2942  unsigned &LineNo, QualType &T,
2943  StringRef &Name, StringRef &LinkageName,
2944  llvm::DIScope *&VDContext) {
2945  Unit = getOrCreateFile(VD->getLocation());
2946  LineNo = getLineNumber(VD->getLocation());
2947 
2948  setLocation(VD->getLocation());
2949 
2950  T = VD->getType();
2951  if (T->isIncompleteArrayType()) {
2952  // CodeGen turns int[] into int[1] so we'll do the same here.
2953  llvm::APInt ConstVal(32, 1);
2954  QualType ET = CGM.getContext().getAsArrayType(T)->getElementType();
2955 
2956  T = CGM.getContext().getConstantArrayType(ET, ConstVal,
2957  ArrayType::Normal, 0);
2958  }
2959 
2960  Name = VD->getName();
2961  if (VD->getDeclContext() && !isa<FunctionDecl>(VD->getDeclContext()) &&
2962  !isa<ObjCMethodDecl>(VD->getDeclContext()))
2963  LinkageName = CGM.getMangledName(VD);
2964  if (LinkageName == Name)
2965  LinkageName = StringRef();
2966 
2967  // Since we emit declarations (DW_AT_members) for static members, place the
2968  // definition of those static members in the namespace they were declared in
2969  // in the source code (the lexical decl context).
2970  // FIXME: Generalize this for even non-member global variables where the
2971  // declaration and definition may have different lexical decl contexts, once
2972  // we have support for emitting declarations of (non-member) global variables.
2973  const DeclContext *DC = VD->isStaticDataMember() ? VD->getLexicalDeclContext()
2974  : VD->getDeclContext();
2975  // When a record type contains an in-line initialization of a static data
2976  // member, and the record type is marked as __declspec(dllexport), an implicit
2977  // definition of the member will be created in the record context. DWARF
2978  // doesn't seem to have a nice way to describe this in a form that consumers
2979  // are likely to understand, so fake the "normal" situation of a definition
2980  // outside the class by putting it in the global scope.
2981  if (DC->isRecord())
2982  DC = CGM.getContext().getTranslationUnitDecl();
2983 
2984  llvm::DIScope *Mod = getParentModuleOrNull(VD);
2985  VDContext = getContextDescriptor(cast<Decl>(DC), Mod ? Mod : TheCU);
2986 }
2987 
2988 llvm::DISubprogram *CGDebugInfo::getFunctionFwdDeclOrStub(GlobalDecl GD,
2989  bool Stub) {
2990  llvm::DINodeArray TParamsArray;
2991  StringRef Name, LinkageName;
2992  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2993  SourceLocation Loc = GD.getDecl()->getLocation();
2994  llvm::DIFile *Unit = getOrCreateFile(Loc);
2995  llvm::DIScope *DContext = Unit;
2996  unsigned Line = getLineNumber(Loc);
2997  collectFunctionDeclProps(GD, Unit, Name, LinkageName, DContext,
2998  TParamsArray, Flags);
2999  auto *FD = dyn_cast<FunctionDecl>(GD.getDecl());
3000 
3001  // Build function type.
3002  SmallVector<QualType, 16> ArgTypes;
3003  if (FD)
3004  for (const ParmVarDecl *Parm : FD->parameters())
3005  ArgTypes.push_back(Parm->getType());
3006  CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv();
3007  QualType FnType = CGM.getContext().getFunctionType(
3008  FD->getReturnType(), ArgTypes, FunctionProtoType::ExtProtoInfo(CC));
3009  if (Stub) {
3010  return DBuilder.createFunction(
3011  DContext, Name, LinkageName, Unit, Line,
3012  getOrCreateFunctionType(GD.getDecl(), FnType, Unit),
3013  !FD->isExternallyVisible(),
3014  /* isDefinition = */ true, 0, Flags, CGM.getLangOpts().Optimize,
3015  TParamsArray.get(), getFunctionDeclaration(FD));
3016  }
3017 
3018  llvm::DISubprogram *SP = DBuilder.createTempFunctionFwdDecl(
3019  DContext, Name, LinkageName, Unit, Line,
3020  getOrCreateFunctionType(GD.getDecl(), FnType, Unit),
3021  !FD->isExternallyVisible(),
3022  /* isDefinition = */ false, 0, Flags, CGM.getLangOpts().Optimize,
3023  TParamsArray.get(), getFunctionDeclaration(FD));
3024  const auto *CanonDecl = cast<FunctionDecl>(FD->getCanonicalDecl());
3025  FwdDeclReplaceMap.emplace_back(std::piecewise_construct,
3026  std::make_tuple(CanonDecl),
3027  std::make_tuple(SP));
3028  return SP;
3029 }
3030 
3031 llvm::DISubprogram *
3032 CGDebugInfo::getFunctionForwardDeclaration(GlobalDecl GD) {
3033  return getFunctionFwdDeclOrStub(GD, /* Stub = */ false);
3034 }
3035 
3036 llvm::DISubprogram *
3037 CGDebugInfo::getFunctionStub(GlobalDecl GD) {
3038  return getFunctionFwdDeclOrStub(GD, /* Stub = */ true);
3039 }
3040 
3041 llvm::DIGlobalVariable *
3042 CGDebugInfo::getGlobalVariableForwardDeclaration(const VarDecl *VD) {
3043  QualType T;
3044  StringRef Name, LinkageName;
3045  SourceLocation Loc = VD->getLocation();
3046  llvm::DIFile *Unit = getOrCreateFile(Loc);
3047  llvm::DIScope *DContext = Unit;
3048  unsigned Line = getLineNumber(Loc);
3049 
3050  collectVarDeclProps(VD, Unit, Line, T, Name, LinkageName, DContext);
3051  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3052  auto *GV = DBuilder.createTempGlobalVariableFwdDecl(
3053  DContext, Name, LinkageName, Unit, Line, getOrCreateType(T, Unit),
3054  !VD->isExternallyVisible(), nullptr, Align);
3055  FwdDeclReplaceMap.emplace_back(
3056  std::piecewise_construct,
3057  std::make_tuple(cast<VarDecl>(VD->getCanonicalDecl())),
3058  std::make_tuple(static_cast<llvm::Metadata *>(GV)));
3059  return GV;
3060 }
3061 
3062 llvm::DINode *CGDebugInfo::getDeclarationOrDefinition(const Decl *D) {
3063  // We only need a declaration (not a definition) of the type - so use whatever
3064  // we would otherwise do to get a type for a pointee. (forward declarations in
3065  // limited debug info, full definitions (if the type definition is available)
3066  // in unlimited debug info)
3067  if (const auto *TD = dyn_cast<TypeDecl>(D))
3068  return getOrCreateType(CGM.getContext().getTypeDeclType(TD),
3069  getOrCreateFile(TD->getLocation()));
3070  auto I = DeclCache.find(D->getCanonicalDecl());
3071 
3072  if (I != DeclCache.end()) {
3073  auto N = I->second;
3074  if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(N))
3075  return GVE->getVariable();
3076  return dyn_cast_or_null<llvm::DINode>(N);
3077  }
3078 
3079  // No definition for now. Emit a forward definition that might be
3080  // merged with a potential upcoming definition.
3081  if (const auto *FD = dyn_cast<FunctionDecl>(D))
3082  return getFunctionForwardDeclaration(FD);
3083  else if (const auto *VD = dyn_cast<VarDecl>(D))
3084  return getGlobalVariableForwardDeclaration(VD);
3085 
3086  return nullptr;
3087 }
3088 
3089 llvm::DISubprogram *CGDebugInfo::getFunctionDeclaration(const Decl *D) {
3090  if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly)
3091  return nullptr;
3092 
3093  const auto *FD = dyn_cast<FunctionDecl>(D);
3094  if (!FD)
3095  return nullptr;
3096 
3097  // Setup context.
3098  auto *S = getDeclContextDescriptor(D);
3099 
3100  auto MI = SPCache.find(FD->getCanonicalDecl());
3101  if (MI == SPCache.end()) {
3102  if (const auto *MD = dyn_cast<CXXMethodDecl>(FD->getCanonicalDecl())) {
3103  return CreateCXXMemberFunction(MD, getOrCreateFile(MD->getLocation()),
3104  cast<llvm::DICompositeType>(S));
3105  }
3106  }
3107  if (MI != SPCache.end()) {
3108  auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second);
3109  if (SP && !SP->isDefinition())
3110  return SP;
3111  }
3112 
3113  for (auto NextFD : FD->redecls()) {
3114  auto MI = SPCache.find(NextFD->getCanonicalDecl());
3115  if (MI != SPCache.end()) {
3116  auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second);
3117  if (SP && !SP->isDefinition())
3118  return SP;
3119  }
3120  }
3121  return nullptr;
3122 }
3123 
3124 // getOrCreateFunctionType - Construct type. If it is a c++ method, include
3125 // implicit parameter "this".
3126 llvm::DISubroutineType *CGDebugInfo::getOrCreateFunctionType(const Decl *D,
3127  QualType FnType,
3128  llvm::DIFile *F) {
3129  if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly)
3130  // Create fake but valid subroutine type. Otherwise -verify would fail, and
3131  // subprogram DIE will miss DW_AT_decl_file and DW_AT_decl_line fields.
3132  return DBuilder.createSubroutineType(DBuilder.getOrCreateTypeArray(None));
3133 
3134  if (const auto *Method = dyn_cast<CXXMethodDecl>(D))
3135  return getOrCreateMethodType(Method, F);
3136 
3137  const auto *FTy = FnType->getAs<FunctionType>();
3138  CallingConv CC = FTy ? FTy->getCallConv() : CallingConv::CC_C;
3139 
3140  if (const auto *OMethod = dyn_cast<ObjCMethodDecl>(D)) {
3141  // Add "self" and "_cmd"
3143 
3144  // First element is always return type. For 'void' functions it is NULL.
3145  QualType ResultTy = OMethod->getReturnType();
3146 
3147  // Replace the instancetype keyword with the actual type.
3148  if (ResultTy == CGM.getContext().getObjCInstanceType())
3149  ResultTy = CGM.getContext().getPointerType(
3150  QualType(OMethod->getClassInterface()->getTypeForDecl(), 0));
3151 
3152  Elts.push_back(getOrCreateType(ResultTy, F));
3153  // "self" pointer is always first argument.
3154  QualType SelfDeclTy;
3155  if (auto *SelfDecl = OMethod->getSelfDecl())
3156  SelfDeclTy = SelfDecl->getType();
3157  else if (auto *FPT = dyn_cast<FunctionProtoType>(FnType))
3158  if (FPT->getNumParams() > 1)
3159  SelfDeclTy = FPT->getParamType(0);
3160  if (!SelfDeclTy.isNull())
3161  Elts.push_back(CreateSelfType(SelfDeclTy, getOrCreateType(SelfDeclTy, F)));
3162  // "_cmd" pointer is always second argument.
3163  Elts.push_back(DBuilder.createArtificialType(
3164  getOrCreateType(CGM.getContext().getObjCSelType(), F)));
3165  // Get rest of the arguments.
3166  for (const auto *PI : OMethod->parameters())
3167  Elts.push_back(getOrCreateType(PI->getType(), F));
3168  // Variadic methods need a special marker at the end of the type list.
3169  if (OMethod->isVariadic())
3170  Elts.push_back(DBuilder.createUnspecifiedParameter());
3171 
3172  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts);
3173  return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
3174  getDwarfCC(CC));
3175  }
3176 
3177  // Handle variadic function types; they need an additional
3178  // unspecified parameter.
3179  if (const auto *FD = dyn_cast<FunctionDecl>(D))
3180  if (FD->isVariadic()) {
3182  EltTys.push_back(getOrCreateType(FD->getReturnType(), F));
3183  if (const auto *FPT = dyn_cast<FunctionProtoType>(FnType))
3184  for (QualType ParamType : FPT->param_types())
3185  EltTys.push_back(getOrCreateType(ParamType, F));
3186  EltTys.push_back(DBuilder.createUnspecifiedParameter());
3187  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys);
3188  return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
3189  getDwarfCC(CC));
3190  }
3191 
3192  return cast<llvm::DISubroutineType>(getOrCreateType(FnType, F));
3193 }
3194 
3196  SourceLocation ScopeLoc, QualType FnType,
3197  llvm::Function *Fn, CGBuilderTy &Builder) {
3198 
3199  StringRef Name;
3200  StringRef LinkageName;
3201 
3202  FnBeginRegionCount.push_back(LexicalBlockStack.size());
3203 
3204  const Decl *D = GD.getDecl();
3205  bool HasDecl = (D != nullptr);
3206 
3207  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3208  llvm::DIFile *Unit = getOrCreateFile(Loc);
3209  llvm::DIScope *FDContext = Unit;
3210  llvm::DINodeArray TParamsArray;
3211  if (!HasDecl) {
3212  // Use llvm function name.
3213  LinkageName = Fn->getName();
3214  } else if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
3215  // If there is a subprogram for this function available then use it.
3216  auto FI = SPCache.find(FD->getCanonicalDecl());
3217  if (FI != SPCache.end()) {
3218  auto *SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second);
3219  if (SP && SP->isDefinition()) {
3220  LexicalBlockStack.emplace_back(SP);
3221  RegionMap[D].reset(SP);
3222  return;
3223  }
3224  }
3225  collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext,
3226  TParamsArray, Flags);
3227  } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) {
3228  Name = getObjCMethodName(OMD);
3229  Flags |= llvm::DINode::FlagPrototyped;
3230  } else {
3231  // Use llvm function name.
3232  Name = Fn->getName();
3233  Flags |= llvm::DINode::FlagPrototyped;
3234  }
3235  if (Name.startswith("\01"))
3236  Name = Name.substr(1);
3237 
3238  if (!HasDecl || D->isImplicit() || D->hasAttr<ArtificialAttr>()) {
3239  Flags |= llvm::DINode::FlagArtificial;
3240  // Artificial functions should not silently reuse CurLoc.
3241  CurLoc = SourceLocation();
3242  }
3243  unsigned LineNo = getLineNumber(Loc);
3244  unsigned ScopeLine = getLineNumber(ScopeLoc);
3245 
3246  // FIXME: The function declaration we're constructing here is mostly reusing
3247  // declarations from CXXMethodDecl and not constructing new ones for arbitrary
3248  // FunctionDecls. When/if we fix this we can have FDContext be TheCU/null for
3249  // all subprograms instead of the actual context since subprogram definitions
3250  // are emitted as CU level entities by the backend.
3251  llvm::DISubprogram *SP = DBuilder.createFunction(
3252  FDContext, Name, LinkageName, Unit, LineNo,
3253  getOrCreateFunctionType(D, FnType, Unit), Fn->hasLocalLinkage(),
3254  true /*definition*/, ScopeLine, Flags, CGM.getLangOpts().Optimize,
3255  TParamsArray.get(), getFunctionDeclaration(D));
3256  Fn->setSubprogram(SP);
3257  // We might get here with a VarDecl in the case we're generating
3258  // code for the initialization of globals. Do not record these decls
3259  // as they will overwrite the actual VarDecl Decl in the cache.
3260  if (HasDecl && isa<FunctionDecl>(D))
3261  DeclCache[D->getCanonicalDecl()].reset(SP);
3262 
3263  // Push the function onto the lexical block stack.
3264  LexicalBlockStack.emplace_back(SP);
3265 
3266  if (HasDecl)
3267  RegionMap[D].reset(SP);
3268 }
3269 
3271  QualType FnType) {
3272  StringRef Name;
3273  StringRef LinkageName;
3274 
3275  const Decl *D = GD.getDecl();
3276  if (!D)
3277  return;
3278 
3279  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3280  llvm::DIFile *Unit = getOrCreateFile(Loc);
3281  llvm::DIScope *FDContext = getDeclContextDescriptor(D);
3282  llvm::DINodeArray TParamsArray;
3283  if (isa<FunctionDecl>(D)) {
3284  // If there is a DISubprogram for this function available then use it.
3285  collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext,
3286  TParamsArray, Flags);
3287  } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) {
3288  Name = getObjCMethodName(OMD);
3289  Flags |= llvm::DINode::FlagPrototyped;
3290  } else {
3291  llvm_unreachable("not a function or ObjC method");
3292  }
3293  if (!Name.empty() && Name[0] == '\01')
3294  Name = Name.substr(1);
3295 
3296  if (D->isImplicit()) {
3297  Flags |= llvm::DINode::FlagArtificial;
3298  // Artificial functions without a location should not silently reuse CurLoc.
3299  if (Loc.isInvalid())
3300  CurLoc = SourceLocation();
3301  }
3302  unsigned LineNo = getLineNumber(Loc);
3303  unsigned ScopeLine = 0;
3304 
3305  DBuilder.retainType(DBuilder.createFunction(
3306  FDContext, Name, LinkageName, Unit, LineNo,
3307  getOrCreateFunctionType(D, FnType, Unit), false /*internalLinkage*/,
3308  false /*definition*/, ScopeLine, Flags, CGM.getLangOpts().Optimize,
3309  TParamsArray.get(), getFunctionDeclaration(D)));
3310 }
3311 
3313  const auto *FD = cast<FunctionDecl>(GD.getDecl());
3314  // If there is a subprogram for this function available then use it.
3315  auto FI = SPCache.find(FD->getCanonicalDecl());
3316  llvm::DISubprogram *SP = nullptr;
3317  if (FI != SPCache.end())
3318  SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second);
3319  if (!SP || !SP->isDefinition())
3320  SP = getFunctionStub(GD);
3321  FnBeginRegionCount.push_back(LexicalBlockStack.size());
3322  LexicalBlockStack.emplace_back(SP);
3323  setInlinedAt(Builder.getCurrentDebugLocation());
3324  EmitLocation(Builder, FD->getLocation());
3325 }
3326 
3328  assert(CurInlinedAt && "unbalanced inline scope stack");
3329  EmitFunctionEnd(Builder, nullptr);
3330  setInlinedAt(llvm::DebugLoc(CurInlinedAt).getInlinedAt());
3331 }
3332 
3334  // Update our current location
3335  setLocation(Loc);
3336 
3337  if (CurLoc.isInvalid() || CurLoc.isMacroID())
3338  return;
3339 
3340  llvm::MDNode *Scope = LexicalBlockStack.back();
3341  Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(
3342  getLineNumber(CurLoc), getColumnNumber(CurLoc), Scope, CurInlinedAt));
3343 }
3344 
3345 void CGDebugInfo::CreateLexicalBlock(SourceLocation Loc) {
3346  llvm::MDNode *Back = nullptr;
3347  if (!LexicalBlockStack.empty())
3348  Back = LexicalBlockStack.back().get();
3349  LexicalBlockStack.emplace_back(DBuilder.createLexicalBlock(
3350  cast<llvm::DIScope>(Back), getOrCreateFile(CurLoc), getLineNumber(CurLoc),
3351  getColumnNumber(CurLoc)));
3352 }
3353 
3354 void CGDebugInfo::AppendAddressSpaceXDeref(
3355  unsigned AddressSpace,
3356  SmallVectorImpl<int64_t> &Expr) const {
3357  Optional<unsigned> DWARFAddressSpace =
3358  CGM.getTarget().getDWARFAddressSpace(AddressSpace);
3359  if (!DWARFAddressSpace)
3360  return;
3361 
3362  Expr.push_back(llvm::dwarf::DW_OP_constu);
3363  Expr.push_back(DWARFAddressSpace.getValue());
3364  Expr.push_back(llvm::dwarf::DW_OP_swap);
3365  Expr.push_back(llvm::dwarf::DW_OP_xderef);
3366 }
3367 
3369  SourceLocation Loc) {
3370  // Set our current location.
3371  setLocation(Loc);
3372 
3373  // Emit a line table change for the current location inside the new scope.
3374  Builder.SetCurrentDebugLocation(
3375  llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc),
3376  LexicalBlockStack.back(), CurInlinedAt));
3377 
3378  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
3379  return;
3380 
3381  // Create a new lexical block and push it on the stack.
3382  CreateLexicalBlock(Loc);
3383 }
3384 
3386  SourceLocation Loc) {
3387  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3388 
3389  // Provide an entry in the line table for the end of the block.
3390  EmitLocation(Builder, Loc);
3391 
3392  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
3393  return;
3394 
3395  LexicalBlockStack.pop_back();
3396 }
3397 
3398 void CGDebugInfo::EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn) {
3399  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3400  unsigned RCount = FnBeginRegionCount.back();
3401  assert(RCount <= LexicalBlockStack.size() && "Region stack mismatch");
3402 
3403  // Pop all regions for this function.
3404  while (LexicalBlockStack.size() != RCount) {
3405  // Provide an entry in the line table for the end of the block.
3406  EmitLocation(Builder, CurLoc);
3407  LexicalBlockStack.pop_back();
3408  }
3409  FnBeginRegionCount.pop_back();
3410 
3411  if (Fn && Fn->getSubprogram())
3412  DBuilder.finalizeSubprogram(Fn->getSubprogram());
3413 }
3414 
3415 llvm::DIType *CGDebugInfo::EmitTypeForVarWithBlocksAttr(const VarDecl *VD,
3416  uint64_t *XOffset) {
3417 
3419  QualType FType;
3420  uint64_t FieldSize, FieldOffset;
3421  uint32_t FieldAlign;
3422 
3423  llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
3424  QualType Type = VD->getType();
3425 
3426  FieldOffset = 0;
3427  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
3428  EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
3429  EltTys.push_back(CreateMemberType(Unit, FType, "__forwarding", &FieldOffset));
3430  FType = CGM.getContext().IntTy;
3431  EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
3432  EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset));
3433 
3434  bool HasCopyAndDispose = CGM.getContext().BlockRequiresCopying(Type, VD);
3435  if (HasCopyAndDispose) {
3436  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
3437  EltTys.push_back(
3438  CreateMemberType(Unit, FType, "__copy_helper", &FieldOffset));
3439  EltTys.push_back(
3440  CreateMemberType(Unit, FType, "__destroy_helper", &FieldOffset));
3441  }
3442  bool HasByrefExtendedLayout;
3443  Qualifiers::ObjCLifetime Lifetime;
3444  if (CGM.getContext().getByrefLifetime(Type, Lifetime,
3445  HasByrefExtendedLayout) &&
3446  HasByrefExtendedLayout) {
3447  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
3448  EltTys.push_back(
3449  CreateMemberType(Unit, FType, "__byref_variable_layout", &FieldOffset));
3450  }
3451 
3452  CharUnits Align = CGM.getContext().getDeclAlign(VD);
3453  if (Align > CGM.getContext().toCharUnitsFromBits(
3454  CGM.getTarget().getPointerAlign(0))) {
3455  CharUnits FieldOffsetInBytes =
3456  CGM.getContext().toCharUnitsFromBits(FieldOffset);
3457  CharUnits AlignedOffsetInBytes = FieldOffsetInBytes.alignTo(Align);
3458  CharUnits NumPaddingBytes = AlignedOffsetInBytes - FieldOffsetInBytes;
3459 
3460  if (NumPaddingBytes.isPositive()) {
3461  llvm::APInt pad(32, NumPaddingBytes.getQuantity());
3462  FType = CGM.getContext().getConstantArrayType(CGM.getContext().CharTy,
3463  pad, ArrayType::Normal, 0);
3464  EltTys.push_back(CreateMemberType(Unit, FType, "", &FieldOffset));
3465  }
3466  }
3467 
3468  FType = Type;
3469  llvm::DIType *FieldTy = getOrCreateType(FType, Unit);
3470  FieldSize = CGM.getContext().getTypeSize(FType);
3471  FieldAlign = CGM.getContext().toBits(Align);
3472 
3473  *XOffset = FieldOffset;
3474  FieldTy = DBuilder.createMemberType(Unit, VD->getName(), Unit, 0, FieldSize,
3475  FieldAlign, FieldOffset,
3476  llvm::DINode::FlagZero, FieldTy);
3477  EltTys.push_back(FieldTy);
3478  FieldOffset += FieldSize;
3479 
3480  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
3481 
3482  llvm::DINode::DIFlags Flags = llvm::DINode::FlagBlockByrefStruct;
3483 
3484  return DBuilder.createStructType(Unit, "", Unit, 0, FieldOffset, 0, Flags,
3485  nullptr, Elements);
3486 }
3487 
3488 llvm::DILocalVariable *CGDebugInfo::EmitDeclare(const VarDecl *VD,
3489  llvm::Value *Storage,
3491  CGBuilderTy &Builder) {
3492  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3493  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3494  if (VD->hasAttr<NoDebugAttr>())
3495  return nullptr;
3496 
3497  bool Unwritten =
3498  VD->isImplicit() || (isa<Decl>(VD->getDeclContext()) &&
3499  cast<Decl>(VD->getDeclContext())->isImplicit());
3500  llvm::DIFile *Unit = nullptr;
3501  if (!Unwritten)
3502  Unit = getOrCreateFile(VD->getLocation());
3503  llvm::DIType *Ty;
3504  uint64_t XOffset = 0;
3505  if (VD->hasAttr<BlocksAttr>())
3506  Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset);
3507  else
3508  Ty = getOrCreateType(VD->getType(), Unit);
3509 
3510  // If there is no debug info for this type then do not emit debug info
3511  // for this variable.
3512  if (!Ty)
3513  return nullptr;
3514 
3515  // Get location information.
3516  unsigned Line = 0;
3517  unsigned Column = 0;
3518  if (!Unwritten) {
3519  Line = getLineNumber(VD->getLocation());
3520  Column = getColumnNumber(VD->getLocation());
3521  }
3523  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3524  if (VD->isImplicit())
3525  Flags |= llvm::DINode::FlagArtificial;
3526 
3527  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3528 
3529  unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(VD->getType());
3530  AppendAddressSpaceXDeref(AddressSpace, Expr);
3531 
3532  // If this is implicit parameter of CXXThis or ObjCSelf kind, then give it an
3533  // object pointer flag.
3534  if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) {
3535  if (IPD->getParameterKind() == ImplicitParamDecl::CXXThis ||
3536  IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf)
3537  Flags |= llvm::DINode::FlagObjectPointer;
3538  }
3539 
3540  // Note: Older versions of clang used to emit byval references with an extra
3541  // DW_OP_deref, because they referenced the IR arg directly instead of
3542  // referencing an alloca. Newer versions of LLVM don't treat allocas
3543  // differently from other function arguments when used in a dbg.declare.
3544  auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
3545  StringRef Name = VD->getName();
3546  if (!Name.empty()) {
3547  if (VD->hasAttr<BlocksAttr>()) {
3548  // Here, we need an offset *into* the alloca.
3549  CharUnits offset = CharUnits::fromQuantity(32);
3550  Expr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3551  // offset of __forwarding field
3552  offset = CGM.getContext().toCharUnitsFromBits(
3553  CGM.getTarget().getPointerWidth(0));
3554  Expr.push_back(offset.getQuantity());
3555  Expr.push_back(llvm::dwarf::DW_OP_deref);
3556  Expr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3557  // offset of x field
3558  offset = CGM.getContext().toCharUnitsFromBits(XOffset);
3559  Expr.push_back(offset.getQuantity());
3560  }
3561  } else if (const auto *RT = dyn_cast<RecordType>(VD->getType())) {
3562  // If VD is an anonymous union then Storage represents value for
3563  // all union fields.
3564  const auto *RD = cast<RecordDecl>(RT->getDecl());
3565  if (RD->isUnion() && RD->isAnonymousStructOrUnion()) {
3566  // GDB has trouble finding local variables in anonymous unions, so we emit
3567  // artifical local variables for each of the members.
3568  //
3569  // FIXME: Remove this code as soon as GDB supports this.
3570  // The debug info verifier in LLVM operates based on the assumption that a
3571  // variable has the same size as its storage and we had to disable the check
3572  // for artificial variables.
3573  for (const auto *Field : RD->fields()) {
3574  llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
3575  StringRef FieldName = Field->getName();
3576 
3577  // Ignore unnamed fields. Do not ignore unnamed records.
3578  if (FieldName.empty() && !isa<RecordType>(Field->getType()))
3579  continue;
3580 
3581  // Use VarDecl's Tag, Scope and Line number.
3582  auto FieldAlign = getDeclAlignIfRequired(Field, CGM.getContext());
3583  auto *D = DBuilder.createAutoVariable(
3584  Scope, FieldName, Unit, Line, FieldTy, CGM.getLangOpts().Optimize,
3585  Flags | llvm::DINode::FlagArtificial, FieldAlign);
3586 
3587  // Insert an llvm.dbg.declare into the current block.
3588  DBuilder.insertDeclare(
3589  Storage, D, DBuilder.createExpression(Expr),
3590  llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt),
3591  Builder.GetInsertBlock());
3592  }
3593  }
3594  }
3595 
3596  // Create the descriptor for the variable.
3597  auto *D = ArgNo
3598  ? DBuilder.createParameterVariable(
3599  Scope, Name, *ArgNo, Unit, Line, Ty,
3600  CGM.getLangOpts().Optimize, Flags)
3601  : DBuilder.createAutoVariable(Scope, Name, Unit, Line, Ty,
3602  CGM.getLangOpts().Optimize, Flags,
3603  Align);
3604 
3605  // Insert an llvm.dbg.declare into the current block.
3606  DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(Expr),
3607  llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt),
3608  Builder.GetInsertBlock());
3609 
3610  return D;
3611 }
3612 
3613 llvm::DILocalVariable *
3615  CGBuilderTy &Builder) {
3616  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3617  return EmitDeclare(VD, Storage, llvm::None, Builder);
3618 }
3619 
3620 llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy,
3621  llvm::DIType *Ty) {
3622  llvm::DIType *CachedTy = getTypeOrNull(QualTy);
3623  if (CachedTy)
3624  Ty = CachedTy;
3625  return DBuilder.createObjectPointerType(Ty);
3626 }
3627 
3629  const VarDecl *VD, llvm::Value *Storage, CGBuilderTy &Builder,
3630  const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint) {
3631  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3632  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3633 
3634  if (Builder.GetInsertBlock() == nullptr)
3635  return;
3636  if (VD->hasAttr<NoDebugAttr>())
3637  return;
3638 
3639  bool isByRef = VD->hasAttr<BlocksAttr>();
3640 
3641  uint64_t XOffset = 0;
3642  llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
3643  llvm::DIType *Ty;
3644  if (isByRef)
3645  Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset);
3646  else
3647  Ty = getOrCreateType(VD->getType(), Unit);
3648 
3649  // Self is passed along as an implicit non-arg variable in a
3650  // block. Mark it as the object pointer.
3651  if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD))
3652  if (IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf)
3653  Ty = CreateSelfType(VD->getType(), Ty);
3654 
3655  // Get location information.
3656  unsigned Line = getLineNumber(VD->getLocation());
3657  unsigned Column = getColumnNumber(VD->getLocation());
3658 
3659  const llvm::DataLayout &target = CGM.getDataLayout();
3660 
3662  target.getStructLayout(blockInfo.StructureType)
3663  ->getElementOffset(blockInfo.getCapture(VD).getIndex()));
3664 
3666  addr.push_back(llvm::dwarf::DW_OP_deref);
3667  addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3668  addr.push_back(offset.getQuantity());
3669  if (isByRef) {
3670  addr.push_back(llvm::dwarf::DW_OP_deref);
3671  addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3672  // offset of __forwarding field
3673  offset =
3674  CGM.getContext().toCharUnitsFromBits(target.getPointerSizeInBits(0));
3675  addr.push_back(offset.getQuantity());
3676  addr.push_back(llvm::dwarf::DW_OP_deref);
3677  addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3678  // offset of x field
3679  offset = CGM.getContext().toCharUnitsFromBits(XOffset);
3680  addr.push_back(offset.getQuantity());
3681  }
3682 
3683  // Create the descriptor for the variable.
3684  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3685  auto *D = DBuilder.createAutoVariable(
3686  cast<llvm::DILocalScope>(LexicalBlockStack.back()), VD->getName(), Unit,
3687  Line, Ty, false, llvm::DINode::FlagZero, Align);
3688 
3689  // Insert an llvm.dbg.declare into the current block.
3690  auto DL =
3691  llvm::DebugLoc::get(Line, Column, LexicalBlockStack.back(), CurInlinedAt);
3692  auto *Expr = DBuilder.createExpression(addr);
3693  if (InsertPoint)
3694  DBuilder.insertDeclare(Storage, D, Expr, DL, InsertPoint);
3695  else
3696  DBuilder.insertDeclare(Storage, D, Expr, DL, Builder.GetInsertBlock());
3697 }
3698 
3700  unsigned ArgNo,
3701  CGBuilderTy &Builder) {
3702  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3703  EmitDeclare(VD, AI, ArgNo, Builder);
3704 }
3705 
3706 namespace {
3707 struct BlockLayoutChunk {
3708  uint64_t OffsetInBits;
3709  const BlockDecl::Capture *Capture;
3710 };
3711 bool operator<(const BlockLayoutChunk &l, const BlockLayoutChunk &r) {
3712  return l.OffsetInBits < r.OffsetInBits;
3713 }
3714 }
3715 
3717  StringRef Name,
3718  unsigned ArgNo,
3719  llvm::AllocaInst *Alloca,
3720  CGBuilderTy &Builder) {
3721  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3722  ASTContext &C = CGM.getContext();
3723  const BlockDecl *blockDecl = block.getBlockDecl();
3724 
3725  // Collect some general information about the block's location.
3726  SourceLocation loc = blockDecl->getCaretLocation();
3727  llvm::DIFile *tunit = getOrCreateFile(loc);
3728  unsigned line = getLineNumber(loc);
3729  unsigned column = getColumnNumber(loc);
3730 
3731  // Build the debug-info type for the block literal.
3732  getDeclContextDescriptor(blockDecl);
3733 
3734  const llvm::StructLayout *blockLayout =
3735  CGM.getDataLayout().getStructLayout(block.StructureType);
3736 
3738  fields.push_back(createFieldType("__isa", C.VoidPtrTy, loc, AS_public,
3739  blockLayout->getElementOffsetInBits(0),
3740  tunit, tunit));
3741  fields.push_back(createFieldType("__flags", C.IntTy, loc, AS_public,
3742  blockLayout->getElementOffsetInBits(1),
3743  tunit, tunit));
3744  fields.push_back(createFieldType("__reserved", C.IntTy, loc, AS_public,
3745  blockLayout->getElementOffsetInBits(2),
3746  tunit, tunit));
3747  auto *FnTy = block.getBlockExpr()->getFunctionType();
3748  auto FnPtrType = CGM.getContext().getPointerType(FnTy->desugar());
3749  fields.push_back(createFieldType("__FuncPtr", FnPtrType, loc, AS_public,
3750  blockLayout->getElementOffsetInBits(3),
3751  tunit, tunit));
3752  fields.push_back(createFieldType(
3753  "__descriptor", C.getPointerType(block.NeedsCopyDispose
3755  : C.getBlockDescriptorType()),
3756  loc, AS_public, blockLayout->getElementOffsetInBits(4), tunit, tunit));
3757 
3758  // We want to sort the captures by offset, not because DWARF
3759  // requires this, but because we're paranoid about debuggers.
3761 
3762  // 'this' capture.
3763  if (blockDecl->capturesCXXThis()) {
3764  BlockLayoutChunk chunk;
3765  chunk.OffsetInBits =
3766  blockLayout->getElementOffsetInBits(block.CXXThisIndex);
3767  chunk.Capture = nullptr;
3768  chunks.push_back(chunk);
3769  }
3770 
3771  // Variable captures.
3772  for (const auto &capture : blockDecl->captures()) {
3773  const VarDecl *variable = capture.getVariable();
3774  const CGBlockInfo::Capture &captureInfo = block.getCapture(variable);
3775 
3776  // Ignore constant captures.
3777  if (captureInfo.isConstant())
3778  continue;
3779 
3780  BlockLayoutChunk chunk;
3781  chunk.OffsetInBits =
3782  blockLayout->getElementOffsetInBits(captureInfo.getIndex());
3783  chunk.Capture = &capture;
3784  chunks.push_back(chunk);
3785  }
3786 
3787  // Sort by offset.
3788  llvm::array_pod_sort(chunks.begin(), chunks.end());
3789 
3790  for (const BlockLayoutChunk &Chunk : chunks) {
3791  uint64_t offsetInBits = Chunk.OffsetInBits;
3792  const BlockDecl::Capture *capture = Chunk.Capture;
3793 
3794  // If we have a null capture, this must be the C++ 'this' capture.
3795  if (!capture) {
3796  QualType type;
3797  if (auto *Method =
3798  cast_or_null<CXXMethodDecl>(blockDecl->getNonClosureContext()))
3799  type = Method->getThisType(C);
3800  else if (auto *RDecl = dyn_cast<CXXRecordDecl>(blockDecl->getParent()))
3801  type = QualType(RDecl->getTypeForDecl(), 0);
3802  else
3803  llvm_unreachable("unexpected block declcontext");
3804 
3805  fields.push_back(createFieldType("this", type, loc, AS_public,
3806  offsetInBits, tunit, tunit));
3807  continue;
3808  }
3809 
3810  const VarDecl *variable = capture->getVariable();
3811  StringRef name = variable->getName();
3812 
3813  llvm::DIType *fieldType;
3814  if (capture->isByRef()) {
3815  TypeInfo PtrInfo = C.getTypeInfo(C.VoidPtrTy);
3816  auto Align = PtrInfo.AlignIsRequired ? PtrInfo.Align : 0;
3817 
3818  // FIXME: this creates a second copy of this type!
3819  uint64_t xoffset;
3820  fieldType = EmitTypeForVarWithBlocksAttr(variable, &xoffset);
3821  fieldType = DBuilder.createPointerType(fieldType, PtrInfo.Width);
3822  fieldType = DBuilder.createMemberType(tunit, name, tunit, line,
3823  PtrInfo.Width, Align, offsetInBits,
3824  llvm::DINode::FlagZero, fieldType);
3825  } else {
3826  auto Align = getDeclAlignIfRequired(variable, CGM.getContext());
3827  fieldType = createFieldType(name, variable->getType(), loc, AS_public,
3828  offsetInBits, Align, tunit, tunit);
3829  }
3830  fields.push_back(fieldType);
3831  }
3832 
3833  SmallString<36> typeName;
3834  llvm::raw_svector_ostream(typeName) << "__block_literal_"
3835  << CGM.getUniqueBlockCount();
3836 
3837  llvm::DINodeArray fieldsArray = DBuilder.getOrCreateArray(fields);
3838 
3839  llvm::DIType *type =
3840  DBuilder.createStructType(tunit, typeName.str(), tunit, line,
3841  CGM.getContext().toBits(block.BlockSize), 0,
3842  llvm::DINode::FlagZero, nullptr, fieldsArray);
3843  type = DBuilder.createPointerType(type, CGM.PointerWidthInBits);
3844 
3845  // Get overall information about the block.
3846  llvm::DINode::DIFlags flags = llvm::DINode::FlagArtificial;
3847  auto *scope = cast<llvm::DILocalScope>(LexicalBlockStack.back());
3848 
3849  // Create the descriptor for the parameter.
3850  auto *debugVar = DBuilder.createParameterVariable(
3851  scope, Name, ArgNo, tunit, line, type,
3852  CGM.getLangOpts().Optimize, flags);
3853 
3854  // Insert an llvm.dbg.declare into the current block.
3855  DBuilder.insertDeclare(Alloca, debugVar, DBuilder.createExpression(),
3856  llvm::DebugLoc::get(line, column, scope, CurInlinedAt),
3857  Builder.GetInsertBlock());
3858 }
3859 
3860 llvm::DIDerivedType *
3861 CGDebugInfo::getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D) {
3862  if (!D->isStaticDataMember())
3863  return nullptr;
3864 
3865  auto MI = StaticDataMemberCache.find(D->getCanonicalDecl());
3866  if (MI != StaticDataMemberCache.end()) {
3867  assert(MI->second && "Static data member declaration should still exist");
3868  return MI->second;
3869  }
3870 
3871  // If the member wasn't found in the cache, lazily construct and add it to the
3872  // type (used when a limited form of the type is emitted).
3873  auto DC = D->getDeclContext();
3874  auto *Ctxt = cast<llvm::DICompositeType>(getDeclContextDescriptor(D));
3875  return CreateRecordStaticField(D, Ctxt, cast<RecordDecl>(DC));
3876 }
3877 
3878 llvm::DIGlobalVariableExpression *CGDebugInfo::CollectAnonRecordDecls(
3879  const RecordDecl *RD, llvm::DIFile *Unit, unsigned LineNo,
3880  StringRef LinkageName, llvm::GlobalVariable *Var, llvm::DIScope *DContext) {
3881  llvm::DIGlobalVariableExpression *GVE = nullptr;
3882 
3883  for (const auto *Field : RD->fields()) {
3884  llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
3885  StringRef FieldName = Field->getName();
3886 
3887  // Ignore unnamed fields, but recurse into anonymous records.
3888  if (FieldName.empty()) {
3889  if (const auto *RT = dyn_cast<RecordType>(Field->getType()))
3890  GVE = CollectAnonRecordDecls(RT->getDecl(), Unit, LineNo, LinkageName,
3891  Var, DContext);
3892  continue;
3893  }
3894  // Use VarDecl's Tag, Scope and Line number.
3895  GVE = DBuilder.createGlobalVariableExpression(
3896  DContext, FieldName, LinkageName, Unit, LineNo, FieldTy,
3897  Var->hasLocalLinkage());
3898  Var->addDebugInfo(GVE);
3899  }
3900  return GVE;
3901 }
3902 
3903 void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
3904  const VarDecl *D) {
3905  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3906  if (D->hasAttr<NoDebugAttr>())
3907  return;
3908 
3909  // If we already created a DIGlobalVariable for this declaration, just attach
3910  // it to the llvm::GlobalVariable.
3911  auto Cached = DeclCache.find(D->getCanonicalDecl());
3912  if (Cached != DeclCache.end())
3913  return Var->addDebugInfo(
3914  cast<llvm::DIGlobalVariableExpression>(Cached->second));
3915 
3916  // Create global variable debug descriptor.
3917  llvm::DIFile *Unit = nullptr;
3918  llvm::DIScope *DContext = nullptr;
3919  unsigned LineNo;
3920  StringRef DeclName, LinkageName;
3921  QualType T;
3922  collectVarDeclProps(D, Unit, LineNo, T, DeclName, LinkageName, DContext);
3923 
3924  // Attempt to store one global variable for the declaration - even if we
3925  // emit a lot of fields.
3926  llvm::DIGlobalVariableExpression *GVE = nullptr;
3927 
3928  // If this is an anonymous union then we'll want to emit a global
3929  // variable for each member of the anonymous union so that it's possible
3930  // to find the name of any field in the union.
3931  if (T->isUnionType() && DeclName.empty()) {
3932  const RecordDecl *RD = T->castAs<RecordType>()->getDecl();
3933  assert(RD->isAnonymousStructOrUnion() &&
3934  "unnamed non-anonymous struct or union?");
3935  GVE = CollectAnonRecordDecls(RD, Unit, LineNo, LinkageName, Var, DContext);
3936  } else {
3937  auto Align = getDeclAlignIfRequired(D, CGM.getContext());
3938 
3940  unsigned AddressSpace =
3941  CGM.getContext().getTargetAddressSpace(D->getType());
3942  AppendAddressSpaceXDeref(AddressSpace, Expr);
3943 
3944  GVE = DBuilder.createGlobalVariableExpression(
3945  DContext, DeclName, LinkageName, Unit, LineNo, getOrCreateType(T, Unit),
3946  Var->hasLocalLinkage(),
3947  Expr.empty() ? nullptr : DBuilder.createExpression(Expr),
3948  getOrCreateStaticDataMemberDeclarationOrNull(D), Align);
3949  Var->addDebugInfo(GVE);
3950  }
3951  DeclCache[D->getCanonicalDecl()].reset(GVE);
3952 }
3953 
3954 void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) {
3955  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3956  if (VD->hasAttr<NoDebugAttr>())
3957  return;
3958  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3959  // Create the descriptor for the variable.
3960  llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
3961  StringRef Name = VD->getName();
3962  llvm::DIType *Ty = getOrCreateType(VD->getType(), Unit);
3963  if (const auto *ECD = dyn_cast<EnumConstantDecl>(VD)) {
3964  const auto *ED = cast<EnumDecl>(ECD->getDeclContext());
3965  assert(isa<EnumType>(ED->getTypeForDecl()) && "Enum without EnumType?");
3966  Ty = getOrCreateType(QualType(ED->getTypeForDecl(), 0), Unit);
3967  }
3968  // Do not use global variables for enums.
3969  //
3970  // FIXME: why not?
3971  if (Ty->getTag() == llvm::dwarf::DW_TAG_enumeration_type)
3972  return;
3973  // Do not emit separate definitions for function local const/statics.
3974  if (isa<FunctionDecl>(VD->getDeclContext()))
3975  return;
3976  VD = cast<ValueDecl>(VD->getCanonicalDecl());
3977  auto *VarD = cast<VarDecl>(VD);
3978  if (VarD->isStaticDataMember()) {
3979  auto *RD = cast<RecordDecl>(VarD->getDeclContext());
3980  getDeclContextDescriptor(VarD);
3981  // Ensure that the type is retained even though it's otherwise unreferenced.
3982  //
3983  // FIXME: This is probably unnecessary, since Ty should reference RD
3984  // through its scope.
3985  RetainedTypes.push_back(
3986  CGM.getContext().getRecordType(RD).getAsOpaquePtr());
3987  return;
3988  }
3989 
3990  llvm::DIScope *DContext = getDeclContextDescriptor(VD);
3991 
3992  auto &GV = DeclCache[VD];
3993  if (GV)
3994  return;
3995  llvm::DIExpression *InitExpr = nullptr;
3996  if (CGM.getContext().getTypeSize(VD->getType()) <= 64) {
3997  // FIXME: Add a representation for integer constants wider than 64 bits.
3998  if (Init.isInt())
3999  InitExpr =
4000  DBuilder.createConstantValueExpression(Init.getInt().getExtValue());
4001  else if (Init.isFloat())
4002  InitExpr = DBuilder.createConstantValueExpression(
4003  Init.getFloat().bitcastToAPInt().getZExtValue());
4004  }
4005  GV.reset(DBuilder.createGlobalVariableExpression(
4006  DContext, Name, StringRef(), Unit, getLineNumber(VD->getLocation()), Ty,
4007  true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VarD),
4008  Align));
4009 }
4010 
4011 llvm::DIScope *CGDebugInfo::getCurrentContextDescriptor(const Decl *D) {
4012  if (!LexicalBlockStack.empty())
4013  return LexicalBlockStack.back();
4014  llvm::DIScope *Mod = getParentModuleOrNull(D);
4015  return getContextDescriptor(D, Mod ? Mod : TheCU);
4016 }
4017 
4019  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4020  return;
4021  const NamespaceDecl *NSDecl = UD.getNominatedNamespace();
4022  if (!NSDecl->isAnonymousNamespace() ||
4023  CGM.getCodeGenOpts().DebugExplicitImport) {
4024  auto Loc = UD.getLocation();
4025  DBuilder.createImportedModule(
4026  getCurrentContextDescriptor(cast<Decl>(UD.getDeclContext())),
4027  getOrCreateNamespace(NSDecl), getOrCreateFile(Loc), getLineNumber(Loc));
4028  }
4029 }
4030 
4032  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4033  return;
4034  assert(UD.shadow_size() &&
4035  "We shouldn't be codegening an invalid UsingDecl containing no decls");
4036  // Emitting one decl is sufficient - debuggers can detect that this is an
4037  // overloaded name & provide lookup for all the overloads.
4038  const UsingShadowDecl &USD = **UD.shadow_begin();
4039 
4040  // FIXME: Skip functions with undeduced auto return type for now since we
4041  // don't currently have the plumbing for separate declarations & definitions
4042  // of free functions and mismatched types (auto in the declaration, concrete
4043  // return type in the definition)
4044  if (const auto *FD = dyn_cast<FunctionDecl>(USD.getUnderlyingDecl()))
4045  if (const auto *AT =
4046  FD->getType()->getAs<FunctionProtoType>()->getContainedAutoType())
4047  if (AT->getDeducedType().isNull())
4048  return;
4049  if (llvm::DINode *Target =
4050  getDeclarationOrDefinition(USD.getUnderlyingDecl())) {
4051  auto Loc = USD.getLocation();
4052  DBuilder.createImportedDeclaration(
4053  getCurrentContextDescriptor(cast<Decl>(USD.getDeclContext())), Target,
4054  getOrCreateFile(Loc), getLineNumber(Loc));
4055  }
4056 }
4057 
4059  if (CGM.getCodeGenOpts().getDebuggerTuning() != llvm::DebuggerKind::LLDB)
4060  return;
4061  if (Module *M = ID.getImportedModule()) {
4063  auto Loc = ID.getLocation();
4064  DBuilder.createImportedDeclaration(
4065  getCurrentContextDescriptor(cast<Decl>(ID.getDeclContext())),
4066  getOrCreateModuleRef(Info, DebugTypeExtRefs), getOrCreateFile(Loc),
4067  getLineNumber(Loc));
4068  }
4069 }
4070 
4071 llvm::DIImportedEntity *
4073  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4074  return nullptr;
4075  auto &VH = NamespaceAliasCache[&NA];
4076  if (VH)
4077  return cast<llvm::DIImportedEntity>(VH);
4078  llvm::DIImportedEntity *R;
4079  auto Loc = NA.getLocation();
4080  if (const auto *Underlying =
4081  dyn_cast<NamespaceAliasDecl>(NA.getAliasedNamespace()))
4082  // This could cache & dedup here rather than relying on metadata deduping.
4083  R = DBuilder.createImportedDeclaration(
4084  getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())),
4085  EmitNamespaceAlias(*Underlying), getOrCreateFile(Loc),
4086  getLineNumber(Loc), NA.getName());
4087  else
4088  R = DBuilder.createImportedDeclaration(
4089  getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())),
4090  getOrCreateNamespace(cast<NamespaceDecl>(NA.getAliasedNamespace())),
4091  getOrCreateFile(Loc), getLineNumber(Loc), NA.getName());
4092  VH.reset(R);
4093  return R;
4094 }
4095 
4096 llvm::DINamespace *
4097 CGDebugInfo::getOrCreateNamespace(const NamespaceDecl *NSDecl) {
4098  // Don't canonicalize the NamespaceDecl here: The DINamespace will be uniqued
4099  // if necessary, and this way multiple declarations of the same namespace in
4100  // different parent modules stay distinct.
4101  auto I = NamespaceCache.find(NSDecl);
4102  if (I != NamespaceCache.end())
4103  return cast<llvm::DINamespace>(I->second);
4104 
4105  llvm::DIScope *Context = getDeclContextDescriptor(NSDecl);
4106  // Don't trust the context if it is a DIModule (see comment above).
4107  llvm::DINamespace *NS =
4108  DBuilder.createNameSpace(Context, NSDecl->getName(), NSDecl->isInline());
4109  NamespaceCache[NSDecl].reset(NS);
4110  return NS;
4111 }
4112 
4113 void CGDebugInfo::setDwoId(uint64_t Signature) {
4114  assert(TheCU && "no main compile unit");
4115  TheCU->setDWOId(Signature);
4116 }
4117 
4118 
4120  // Creating types might create further types - invalidating the current
4121  // element and the size(), so don't cache/reference them.
4122  for (size_t i = 0; i != ObjCInterfaceCache.size(); ++i) {
4123  ObjCInterfaceCacheEntry E = ObjCInterfaceCache[i];
4124  llvm::DIType *Ty = E.Type->getDecl()->getDefinition()
4125  ? CreateTypeDefinition(E.Type, E.Unit)
4126  : E.Decl;
4127  DBuilder.replaceTemporary(llvm::TempDIType(E.Decl), Ty);
4128  }
4129 
4130  for (auto p : ReplaceMap) {
4131  assert(p.second);
4132  auto *Ty = cast<llvm::DIType>(p.second);
4133  assert(Ty->isForwardDecl());
4134 
4135  auto it = TypeCache.find(p.first);
4136  assert(it != TypeCache.end());
4137  assert(it->second);
4138 
4139  DBuilder.replaceTemporary(llvm::TempDIType(Ty),
4140  cast<llvm::DIType>(it->second));
4141  }
4142 
4143  for (const auto &p : FwdDeclReplaceMap) {
4144  assert(p.second);
4145  llvm::TempMDNode FwdDecl(cast<llvm::MDNode>(p.second));
4146  llvm::Metadata *Repl;
4147 
4148  auto it = DeclCache.find(p.first);
4149  // If there has been no definition for the declaration, call RAUW
4150  // with ourselves, that will destroy the temporary MDNode and
4151  // replace it with a standard one, avoiding leaking memory.
4152  if (it == DeclCache.end())
4153  Repl = p.second;
4154  else
4155  Repl = it->second;
4156 
4157  if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(Repl))
4158  Repl = GVE->getVariable();
4159  DBuilder.replaceTemporary(std::move(FwdDecl), cast<llvm::MDNode>(Repl));
4160  }
4161 
4162  // We keep our own list of retained types, because we need to look
4163  // up the final type in the type cache.
4164  for (auto &RT : RetainedTypes)
4165  if (auto MD = TypeCache[RT])
4166  DBuilder.retainType(cast<llvm::DIType>(MD));
4167 
4168  DBuilder.finalize();
4169 }
4170 
4172  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4173  return;
4174 
4175  if (auto *DieTy = getOrCreateType(Ty, getOrCreateMainFile()))
4176  // Don't ignore in case of explicit cast where it is referenced indirectly.
4177  DBuilder.retainType(DieTy);
4178 }
4179 
4181  if (LexicalBlockStack.empty())
4182  return llvm::DebugLoc();
4183 
4184  llvm::MDNode *Scope = LexicalBlockStack.back();
4185  return llvm::DebugLoc::get(
4186  getLineNumber(Loc), getColumnNumber(Loc), Scope);
4187 }
bool isNoReturn() const
Determines whether this function is known to be &#39;noreturn&#39;, through an attribute on its declaration o...
Definition: Decl.cpp:2820
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
VarDecl * getCapturedVar() const
Retrieve the declaration of the local variable being captured.
bool isStruct() const
Definition: Decl.h:3184
const Capture & getCapture(const VarDecl *var) const
Definition: CGBlocks.h:261
Represents a function declaration or definition.
Definition: Decl.h:1696
FunctionTemplateDecl * getTemplate() const
Retrieve the template from which this function was specialized.
Definition: DeclTemplate.h:549
static bool hasDefaultSetterName(const ObjCPropertyDecl *PD, const ObjCMethodDecl *Setter)
bool isObjCQualifiedIdType() const
True if this is equivalent to &#39;id.
Definition: Type.h:5525
const FunctionProtoType * getFunctionType() const
getFunctionType - Return the underlying function type for this block.
Definition: Expr.cpp:2005
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:3717
Module * getOwningModule() const
Get the module that owns this declaration (for visibility purposes).
Definition: DeclBase.h:751
StringRef getName(const PrintingPolicy &Policy) const
Definition: Type.cpp:2581
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2289
QualType getElementType() const
Definition: Type.h:5668
CanQualType VoidPtrTy
Definition: ASTContext.h:1012
QualType getPointeeType() const
Definition: Type.h:2302
void EmitLocation(raw_ostream &o, const SourceManager &SM, SourceLocation L, const FIDMap &FM, unsigned indent)
Definition: PlistSupport.h:97
bool isPrimaryBaseVirtual() const
isPrimaryBaseVirtual - Get whether the primary base for this record is virtual or not...
Definition: RecordLayout.h:216
static uint32_t getTypeAlignIfRequired(const Type *Ty, const ASTContext &Ctx)
Definition: CGDebugInfo.cpp:51
A (possibly-)qualified type.
Definition: Type.h:653
base_class_range bases()
Definition: DeclCXX.h:784
const CodeGenOptions & getCodeGenOpts() const
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:994
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:5990
QualType getDesugaredType(const ASTContext &Context) const
Return the specified type with any "sugar" removed from the type.
Definition: Type.h:951
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:3397
llvm::DIType * getOrCreateRecordType(QualType Ty, SourceLocation L)
Emit record type&#39;s standalone debug info.
Kind getKind() const
Definition: Type.h:2170
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3062
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:223
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:6021
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1891
const Type * getTypeForDecl() const
Definition: Decl.h:2802
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
TagDecl * getDecl() const
Definition: Type.cpp:3038
bool isVirtual() const
Definition: DeclCXX.h:2064
Selector getObjCSelector() const
getObjCSelector - Get the Objective-C selector stored in this declaration name.
Defines the C++ template declaration subclasses.
Parameter for C++ &#39;this&#39; argument.
Definition: Decl.h:1466
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:1356
Represents an array type, per C99 6.7.5.2 - Array Declarators.
Definition: Type.h:2564
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:95
QualType getValueType() const
Gets the type contained by this atomic type, i.e.
Definition: Type.h:5635
Describes the capture of a variable or of this, or of a C++1y init-capture.
Definition: LambdaCapture.h:26
MSInheritanceAttr::Spelling getMSInheritanceModel() const
Returns the inheritance model used for this record.
QualType getElementType() const
Definition: Type.h:2599
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3119
enumerator_range enumerators() const
Definition: Decl.h:3357
bool isInterface() const
Definition: Decl.h:3185
Represents a variable declaration or definition.
Definition: Decl.h:812
void removeObjCLifetime()
Definition: Type.h:347
QualType getReturnType() const
Definition: Decl.h:2229
bool isFixed() const
Returns true if this is an Objective-C, C++11, or Microsoft-style enumeration with a fixed underlying...
Definition: Decl.h:3446
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6317
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:3393
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:1580
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:1690
void completeTemplateDefinition(const ClassTemplateSpecializationDecl &SD)
bool hasDefinition() const
Definition: DeclCXX.h:749
static const NamedDecl * getDefinition(const Decl *D)
Definition: SemaDecl.cpp:2512
Represents a parameter to a function.
Definition: Decl.h:1515
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:152
PipeType - OpenCL20.
Definition: Type.h:5654
bool isClass() const
Definition: Decl.h:3186
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:3510
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:5190
void removeRestrict()
Definition: Type.h:287
QualType getPointeeType() const
Definition: Type.h:2406
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:149
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:3629
void EmitImportDecl(const ImportDecl &ID)
Emit an declaration.
field_range fields() const
Definition: Decl.h:3639
Represents a member of a struct/union/class.
Definition: Decl.h:2488
TemplateName getTemplateName() const
Retrieve the name of the template that we are specializing.
Definition: Type.h:4569
void removeConst()
Definition: Type.h:273
CXXMethodDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:2101
prop_range properties() const
Definition: DeclObjC.h:1006
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:832
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:184
Describes a module or submodule.
Definition: Module.h:65
QualType getParamTypeForDecl() const
Definition: TemplateBase.h:269
unsigned getTypeQuals() const
Definition: Type.h:3633
Qualifiers getLocalQualifiers() const
Retrieve the set of qualifiers local to this particular QualType instance, not including any qualifie...
Definition: Type.h:5743
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:2189
Provides information about a function template specialization, which is a FunctionDecl that has been ...
Definition: DeclTemplate.h:507
bool isGLValue() const
Definition: Expr.h:252
Represents a C++ using-declaration.
Definition: DeclCXX.h:3334
Type(TypeClass tc, QualType canon, bool Dependent, bool InstantiationDependent, bool VariablyModified, bool ContainsUnexpandedParameterPack)
Definition: Type.h:1577
const TemplateArgumentList * TemplateArguments
The template arguments used to produce the function template specialization from the function templat...
Definition: DeclTemplate.h:539
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:2490
QualType getThisType(ASTContext &C) const
Returns the type of the this pointer.
Definition: DeclCXX.cpp:1989
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:2566
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:80
RefQualifierKind getRefQualifier() const
Retrieve the ref-qualifier associated with this method.
Definition: DeclCXX.h:2174
An lvalue ref-qualifier was provided (&).
Definition: Type.h:1312
~ApplyInlineDebugLocation()
Restore everything back to the orginial 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
const BlockDecl * getBlockDecl() const
Definition: CGBlocks.h:271
uint32_t Offset
Definition: CacheTokens.cpp:43
bool hasPrototype() const
Whether this function has a prototype, either because one was explicitly written or because it was "i...
Definition: Decl.h:2043
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:4554
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:3742
Represents a declaration of a type.
Definition: Decl.h:2778
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:2542
FunctionTemplateSpecializationInfo * getTemplateSpecializationInfo() const
If this function is actually a function template specialization, retrieve information about this func...
Definition: Decl.cpp:3349
bool isLambda() const
Determine whether this class describes a lambda function object.
Definition: DeclCXX.h:1163
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:39
static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R)
Returns the common set of qualifiers while removing them from the given sets.
Definition: Type.h:203
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:5724
unsigned Align
Definition: ASTContext.h:139
field_iterator field_begin() const
Definition: Decl.cpp:3968
bool AlignIsRequired
Definition: ASTContext.h:140
bool isInt() const
Definition: APValue.h:183
bool isCompleteDefinitionRequired() const
Return true if this complete decl is required to be complete for some existing use.
Definition: Decl.h:3125
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:60
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:820
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:2047
void * getAsOpaquePtr() const
Definition: Type.h:699
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:3212
Represents an ObjC class declaration.
Definition: DeclObjC.h:1191
shadow_iterator shadow_begin() const
Definition: DeclCXX.h:3438
void removeVolatile()
Definition: Type.h:280
bool hasConst() const
Definition: Type.h:269
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:869
bool isAnonymousStructOrUnion() const
Whether this is an anonymous struct or union.
Definition: Decl.h:3576
Module * getImportedModule() const
Retrieve the module that was imported by the import declaration.
Definition: Decl.h:4032
bool NeedsCopyDispose
True if the block needs a custom copy or dispose function.
Definition: CGBlocks.h:218
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2778
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:535
QualType getBaseType() const
Gets the base type of this object type.
Definition: Type.h:5253
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3274
bool isDynamicClass() const
Definition: DeclCXX.h:762
CGBlockInfo - Information to generate a block literal.
Definition: CGBlocks.h:149
TemplateSpecializationKind getTemplateSpecializationKind() const
Determine whether this particular class is a specialization or instantiation of a class template or m...
Definition: DeclCXX.cpp:1443
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:5159
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
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:1219
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:3713
Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...
Definition: Decl.h:636
Expr - This represents one expression.
Definition: Expr.h:106
QualType getPointeeType() const
Definition: Type.h:2446
SourceLocation End
known_extensions_range known_extensions() const
Definition: DeclObjC.h:1780
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:2575
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 FunctionProtoType * T
const CXXRecordDecl * getPointeeCXXRecordDecl() const
If this is a pointer or reference to a RecordType, return the CXXRecordDecl that that type refers to...
Definition: Type.cpp:1575
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6380
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:2675
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:551
const TemplateArgumentList * getTemplateSpecializationArgs() const
Retrieve the template arguments used to produce this function template specialization from the primar...
Definition: Decl.cpp:3355
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:3642
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:425
ObjCInterfaceDecl * getSuperClass() const
Definition: DeclObjC.cpp:330
const CXXRecordDecl * getPrimaryBase() const
getPrimaryBase - Get the primary base for this record.
Definition: RecordLayout.h:208
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:3331
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:1800
QualType getType() const
Definition: Expr.h:128
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:134
bool hasExtendableVFPtr() const
hasVFPtr - Does this class have a virtual function table pointer that can be extended by a derived cl...
Definition: RecordLayout.h:258
unsigned getMaxAlignment() const
getMaxAlignment - return the maximum alignment specified by attributes on this decl, 0 if there are none.
Definition: DeclBase.cpp:386
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1335
method_iterator method_end() const
Method past-the-end iterator.
Definition: DeclCXX.h:837
Represents an unpacked "presumed" location which can be presented to the user.
bool isInstanceMethod() const
Definition: DeclObjC.h:452
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:2920
SourceLocation getCaretLocation() const
Definition: Decl.h:3785
An lvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2472
APValue * evaluateValue() const
Attempt to evaluate the value of the initializer attached to this declaration, and produce notes expl...
Definition: Decl.cpp:2210
Selector getSelector() const
Definition: DeclObjC.h:359
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:1479
bool isUnionType() const
Definition: Type.cpp:432
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:719
ImplicitParamDecl * getSelfDecl() const
Definition: DeclObjC.h:444
const SourceManager & SM
Definition: Format.cpp:1412
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:233
VarDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.cpp:1978
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:3992
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:181
virtual void printName(raw_ostream &os) const
Definition: Decl.cpp:1468
unsigned size_overridden_methods() const
Definition: DeclCXX.cpp:1977
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:3506
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: Redeclarable.h:299
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:5403
QualType getReturnType() const
Definition: Type.h:3207
bool isPure() const
Whether this virtual function is pure, i.e.
Definition: Decl.h:2006
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of enums...
Definition: Type.h:4008
Interfaces are the core concept in Objective-C for object oriented design.
Definition: Type.h:5390
llvm::StructType * StructureType
Definition: CGBlocks.h:236
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:2968
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:378
QualType getElementType() const
Definition: Type.h:2955
const Decl * getDecl() const
Definition: GlobalDecl.h:64
static QualType getUnderlyingType(const SubRegion *R)
Cached information about one file (either on disk or in the virtual file system). ...
Definition: FileManager.h:59
APFloat & getFloat()
Definition: APValue.h:209
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2019
TypedefNameDecl * getTypedefNameForUnnamedTagDecl(const TagDecl *TD)
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2299
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:3732
bool hasRestrict() const
Definition: Type.h:283
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:746
bool isFromASTFile() const
Determine whether this declaration came from an AST file (such as a precompiled header or module) rat...
Definition: DeclBase.h:694
const BlockExpr * getBlockExpr() const
Definition: CGBlocks.h:272
TypeClass getTypeClass() const
Definition: Type.h:1618
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:146
bool operator<(DeclarationName LHS, DeclarationName RHS)
Ordering on two declaration names.
VarDecl * getVariable() const
The variable being captured.
Definition: Decl.h:3738
llvm::APSInt getAsIntegral() const
Retrieve the template argument as an integral value.
Definition: TemplateBase.h:301
EnumDecl * getDecl() const
Definition: Type.h:4015
unsigned CXXThisIndex
The field index of &#39;this&#39; within the block, if there is one.
Definition: CGBlocks.h:155
An rvalue ref-qualifier was provided (&&).
Definition: Type.h:1315
void removeObjCGCAttr()
Definition: Type.h:324
ObjCImplementationDecl * getImplementation() const
Definition: DeclObjC.cpp:1513
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:3988
SourceLocation getExprLoc() const LLVM_READONLY
getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic exp...
Definition: Expr.cpp:216
StringRef getName() const
Return the actual identifier string.
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2820
CXXRecordDecl * getMostRecentCXXRecordDecl() const
Definition: Type.cpp:3909
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:2345
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:1572
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:5691
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1256
ArrayRef< Capture > captures() const
Definition: Decl.h:3839
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:1409
Parameter for Objective-C &#39;self&#39; argument.
Definition: Decl.h:1460
QualType getUnderlyingType() const
Definition: Decl.h:2875
llvm::iterator_range< base_class_const_iterator > base_class_const_range
Definition: DeclCXX.h:782
const Expr * getInit() const
Definition: Decl.h:1214
AccessSpecifier getAccess() const
Definition: DeclBase.h:460
ObjCInterfaceDecl * getDefinition()
Retrieve the definition of this class, or NULL if this class has been forward-declared (with @class) ...
Definition: DeclObjC.h:1568
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:756
Emit location information but do not generate debug info in the output.
This template specialization was instantiated from a template due to an explicit instantiation declar...
Definition: Specifiers.h:157
const CXXRecordDecl * getParent() const
Returns the parent of this method declaration, which is the class in which this method is defined...
Definition: DeclCXX.h:2140
const Type * strip(QualType type)
Collect any qualifiers on the given type and return an unqualified type.
Definition: Type.h:5698
Decl * getNonClosureContext()
Find the innermost non-closure ancestor of this declaration, walking up through blocks, lambdas, etc.
Definition: DeclBase.cpp:972
unsigned shadow_size() const
Return the number of shadowed declarations associated with this using declaration.
Definition: DeclCXX.h:3446
CGDebugInfo(CodeGenModule &CGM)
Definition: CGDebugInfo.cpp:64
Represents an enum.
Definition: Decl.h:3261
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:2508
TemplateSpecializationKind
Describes the kind of template specialization that a particular template specialization declaration r...
Definition: Specifiers.h:143
QualType apply(const ASTContext &Context, QualType QT) const
Apply the collected qualifiers to the given type.
Definition: Type.cpp:3272
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1048
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:1600
Represents a pointer to an Objective C object.
Definition: Type.h:5446
Pointer to a block type.
Definition: Type.h:2391
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:2571
bool isIncompleteArrayType() const
Definition: Type.h:6005
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:3982
Complex values, per C99 6.2.5p11.
Definition: Type.h:2229
Don&#39;t generate debug info.
bool empty() const
Definition: Type.h:429
llvm::DIType * getOrCreateStandaloneType(QualType Ty, SourceLocation Loc)
Emit standalone debug info for a type.
unsigned getOwningModuleID() const
Retrieve the global ID of the module that owns this particular declaration.
Definition: DeclBase.h:706
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:2018
bool isIncompleteType(NamedDecl **Def=nullptr) const
Types are partitioned into 3 broad categories (C99 6.2.5p1): object types, function types...
Definition: Type.cpp:1986
The type-property cache.
Definition: Type.cpp:3351
bool capturesCXXThis() const
Definition: Decl.h:3844
A template argument list.
Definition: DeclTemplate.h:210
TypedefNameDecl * getDecl() const
Definition: Type.h:3779
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:5116
CallingConv getCallConv() const
Definition: Type.h:3217
QualType getAliasedType() const
Get the aliased type, if this is a specialization of a type alias template.
Definition: Type.h:4558
TypedefNameDecl * getTypedefNameForAnonDecl() const
Definition: Decl.h:3209
Represents a C++ struct/union/class.
Definition: DeclCXX.h:299
ArrayRef< TemplateArgument > template_arguments() const
Definition: Type.h:4583
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:1964
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.
void EmitFunctionStart(GlobalDecl GD, SourceLocation Loc, SourceLocation ScopeLoc, QualType FnType, llvm::Function *Fn, CGBuilderTy &Builder)
Emit a call to llvm.dbg.function.start to indicate start of a new function.
This class is used for builtin types like &#39;int&#39;.
Definition: Type.h:2149
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:444
QualType getIntegerType() const
Return the integer type this enum decl corresponds to.
Definition: Decl.h:3384
StringRef getName() const
Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:275
uint64_t Index
Method&#39;s index in the vftable.
bool hasVolatile() const
Definition: Type.h:276
void setLocation(SourceLocation Loc)
Update the current source location.
CGCXXABI & getCXXABI() const
uint64_t Width
Definition: ASTContext.h:138
std::string getQualifiedNameAsString() const
Definition: Decl.cpp:1472
CanQualType IntTy
Definition: ASTContext.h:1004
Abstracts clang modules and precompiled header files and holds everything needed to generate debug in...
unsigned getNumElements() const
Definition: Type.h:2956
QualType getAsType() const
Retrieve the type for a type template argument.
Definition: TemplateBase.h:257
bool isUnion() const
Definition: Decl.h:3187
Represents a type template specialization; the template must be a class template, a type alias templa...
Definition: Type.h:4499
bool MSVCFormatting
Use whitespace and punctuation like MSVC does.
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:3196
capture_const_iterator captures_begin() const
Definition: DeclCXX.h:1215
bool isStaticDataMember() const
Determines whether this is a static data member.
Definition: Decl.h:1129
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:352
FunctionDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.cpp:2846
ObjCIvarDecl * all_declared_ivar_begin()
all_declared_ivar_begin - return first ivar declared in this class, its extensions and its implementa...
Definition: DeclObjC.cpp:1556
static SmallString< 256 > getUniqueTagTypeName(const TagType *Ty, CodeGenModule &CGM, llvm::DICompileUnit *TheCU)
In C++ mode, types have linkage, so we can rely on the ODR and on their mangled names, if they&#39;re external.
Represents a C++ namespace alias.
Definition: DeclCXX.h:3002
TemplateName getAsTemplate() const
Retrieve the template name for a template name argument.
Definition: TemplateBase.h:281
APSInt & getInt()
Definition: APValue.h:201
static bool isDefinedInClangModule(const RecordDecl *RD)
Does a type definition exist in an imported clang module?
Represents C++ using-directive.
Definition: DeclCXX.h:2898
void removeAddressSpace()
Definition: Type.h:392
bool isObjCZeroArgSelector() const
base_class_range vbases()
Definition: DeclCXX.h:801
This class handles loading and caching of source files into memory.
SourceLocation getLocation() const
Definition: DeclBase.h:416
QualType getPointeeType() const
Definition: Type.h:2528
Represents a shadow declaration introduced into a scope by a (resolved) using declaration.
Definition: DeclCXX.h:3121
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:3098
QualType getPointeeType() const
Gets the type pointed to by this ObjC pointer.
Definition: Type.h:5462
method_range methods() const
Definition: DeclCXX.h:826