Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/lib/CodeGen/CGDebugInfo.cpp
Line
Count
Source (jump to first uncovered line)
1
//===--- CGDebugInfo.cpp - Emit Debug Information for a Module ------------===//
2
//
3
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4
// See https://llvm.org/LICENSE.txt for license information.
5
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6
//
7
//===----------------------------------------------------------------------===//
8
//
9
// This coordinates the debug information generation while generating code.
10
//
11
//===----------------------------------------------------------------------===//
12
13
#include "CGDebugInfo.h"
14
#include "CGBlocks.h"
15
#include "CGCXXABI.h"
16
#include "CGObjCRuntime.h"
17
#include "CGRecordLayout.h"
18
#include "CodeGenFunction.h"
19
#include "CodeGenModule.h"
20
#include "ConstantEmitter.h"
21
#include "clang/Analysis/Analyses/ExprMutationAnalyzer.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"
28
#include "clang/Basic/CodeGenOptions.h"
29
#include "clang/Basic/FileManager.h"
30
#include "clang/Basic/SourceManager.h"
31
#include "clang/Basic/Version.h"
32
#include "clang/Frontend/FrontendOptions.h"
33
#include "clang/Lex/HeaderSearchOptions.h"
34
#include "clang/Lex/ModuleMap.h"
35
#include "clang/Lex/PreprocessorOptions.h"
36
#include "llvm/ADT/DenseSet.h"
37
#include "llvm/ADT/SmallVector.h"
38
#include "llvm/ADT/StringExtras.h"
39
#include "llvm/IR/Constants.h"
40
#include "llvm/IR/DataLayout.h"
41
#include "llvm/IR/DerivedTypes.h"
42
#include "llvm/IR/Instructions.h"
43
#include "llvm/IR/Intrinsics.h"
44
#include "llvm/IR/Metadata.h"
45
#include "llvm/IR/Module.h"
46
#include "llvm/Support/FileSystem.h"
47
#include "llvm/Support/MD5.h"
48
#include "llvm/Support/Path.h"
49
using namespace clang;
50
using namespace clang::CodeGen;
51
52
3.23k
static uint32_t getTypeAlignIfRequired(const Type *Ty, const ASTContext &Ctx) {
53
3.23k
  auto TI = Ctx.getTypeInfo(Ty);
54
3.23k
  return TI.AlignIsRequired ? 
TI.Align0
: 0;
55
3.23k
}
56
57
1.08k
static uint32_t getTypeAlignIfRequired(QualType Ty, const ASTContext &Ctx) {
58
1.08k
  return getTypeAlignIfRequired(Ty.getTypePtr(), Ctx);
59
1.08k
}
60
61
6.84k
static uint32_t getDeclAlignIfRequired(const Decl *D, const ASTContext &Ctx) {
62
6.84k
  return D->hasAttr<AlignedAttr>() ? 
D->getMaxAlignment()0
: 0;
63
6.84k
}
64
65
CGDebugInfo::CGDebugInfo(CodeGenModule &CGM)
66
    : CGM(CGM), DebugKind(CGM.getCodeGenOpts().getDebugInfo()),
67
      DebugTypeExtRefs(CGM.getCodeGenOpts().DebugTypeExtRefs),
68
2.92k
      DBuilder(CGM.getModule()) {
69
2.92k
  for (const auto &KV : CGM.getCodeGenOpts().DebugPrefixMap)
70
5
    DebugPrefixMap[KV.first] = KV.second;
71
2.92k
  CreateCompileUnit();
72
2.92k
}
73
74
2.92k
CGDebugInfo::~CGDebugInfo() {
75
2.92k
  assert(LexicalBlockStack.empty() &&
76
2.92k
         "Region stack mismatch, stack not empty!");
77
2.92k
}
78
79
ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF,
80
                                       SourceLocation TemporaryLocation)
81
613k
    : CGF(&CGF) {
82
613k
  init(TemporaryLocation);
83
613k
}
84
85
ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF,
86
                                       bool DefaultToEmpty,
87
                                       SourceLocation TemporaryLocation)
88
559k
    : CGF(&CGF) {
89
559k
  init(TemporaryLocation, DefaultToEmpty);
90
559k
}
91
92
void ApplyDebugLocation::init(SourceLocation TemporaryLocation,
93
15.5M
                              bool DefaultToEmpty) {
94
15.5M
  auto *DI = CGF->getDebugInfo();
95
15.5M
  if (!DI) {
96
10.6M
    CGF = nullptr;
97
10.6M
    return;
98
10.6M
  }
99
4.85M
100
4.85M
  OriginalLocation = CGF->Builder.getCurrentDebugLocation();
101
4.85M
102
4.85M
  if (OriginalLocation && 
!DI->CGM.getExpressionLocationsEnabled()4.85M
)
103
548
    return;
104
4.85M
105
4.85M
  if (TemporaryLocation.isValid()) {
106
4.81M
    DI->EmitLocation(CGF->Builder, TemporaryLocation);
107
4.81M
    return;
108
4.81M
  }
109
34.3k
110
34.3k
  if (DefaultToEmpty) {
111
25.4k
    CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc());
112
25.4k
    return;
113
25.4k
  }
114
8.92k
115
8.92k
  // Construct a location that has a valid scope, but no line info.
116
8.92k
  assert(!DI->LexicalBlockStack.empty());
117
8.92k
  CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(
118
8.92k
      0, 0, DI->LexicalBlockStack.back(), DI->getInlinedAt()));
119
8.92k
}
120
121
ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E)
122
14.3M
    : CGF(&CGF) {
123
14.3M
  init(E->getExprLoc());
124
14.3M
}
125
126
ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc)
127
386k
    : CGF(&CGF) {
128
386k
  if (!CGF.getDebugInfo()) {
129
269k
    this->CGF = nullptr;
130
269k
    return;
131
269k
  }
132
117k
  OriginalLocation = CGF.Builder.getCurrentDebugLocation();
133
117k
  if (Loc)
134
39.7k
    CGF.Builder.SetCurrentDebugLocation(std::move(Loc));
135
117k
}
136
137
15.9M
ApplyDebugLocation::~ApplyDebugLocation() {
138
15.9M
  // Query CGF so the location isn't overwritten when location updates are
139
15.9M
  // temporarily disabled (for C++ default function arguments)
140
15.9M
  if (CGF)
141
4.97M
    CGF->Builder.SetCurrentDebugLocation(std::move(OriginalLocation));
142
15.9M
}
143
144
ApplyInlineDebugLocation::ApplyInlineDebugLocation(CodeGenFunction &CGF,
145
                                                   GlobalDecl InlinedFn)
146
47
    : CGF(&CGF) {
147
47
  if (!CGF.getDebugInfo()) {
148
44
    this->CGF = nullptr;
149
44
    return;
150
44
  }
151
3
  auto &DI = *CGF.getDebugInfo();
152
3
  SavedLocation = DI.getLocation();
153
3
  assert((DI.getInlinedAt() ==
154
3
          CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) &&
155
3
         "CGDebugInfo and IRBuilder are out of sync");
156
3
157
3
  DI.EmitInlineFunctionStart(CGF.Builder, InlinedFn);
158
3
}
159
160
47
ApplyInlineDebugLocation::~ApplyInlineDebugLocation() {
161
47
  if (!CGF)
162
44
    return;
163
3
  auto &DI = *CGF->getDebugInfo();
164
3
  DI.EmitInlineFunctionEnd(CGF->Builder);
165
3
  DI.EmitLocation(CGF->Builder, SavedLocation);
166
3
}
167
168
6.30M
void CGDebugInfo::setLocation(SourceLocation Loc) {
169
6.30M
  // If the new location isn't valid return.
170
6.30M
  if (Loc.isInvalid())
171
2.46k
    return;
172
6.30M
173
6.30M
  CurLoc = CGM.getContext().getSourceManager().getExpansionLoc(Loc);
174
6.30M
175
6.30M
  // If we've changed files in the middle of a lexical scope go ahead
176
6.30M
  // and create a new lexical scope with file node if it's different
177
6.30M
  // from the one in the scope.
178
6.30M
  if (LexicalBlockStack.empty())
179
503
    return;
180
6.30M
181
6.30M
  SourceManager &SM = CGM.getContext().getSourceManager();
182
6.30M
  auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
183
6.30M
  PresumedLoc PCLoc = SM.getPresumedLoc(CurLoc);
184
6.30M
  if (PCLoc.isInvalid() || Scope->getFile() == getOrCreateFile(CurLoc))
185
6.29M
    return;
186
1.00k
187
1.00k
  if (auto *LBF = dyn_cast<llvm::DILexicalBlockFile>(Scope)) {
188
591
    LexicalBlockStack.pop_back();
189
591
    LexicalBlockStack.emplace_back(DBuilder.createLexicalBlockFile(
190
591
        LBF->getScope(), getOrCreateFile(CurLoc)));
191
591
  } else 
if (411
isa<llvm::DILexicalBlock>(Scope)411
||
192
411
             isa<llvm::DISubprogram>(Scope)) {
193
411
    LexicalBlockStack.pop_back();
194
411
    LexicalBlockStack.emplace_back(
195
411
        DBuilder.createLexicalBlockFile(Scope, getOrCreateFile(CurLoc)));
196
411
  }
197
1.00k
}
198
199
3.71k
llvm::DIScope *CGDebugInfo::getDeclContextDescriptor(const Decl *D) {
200
3.71k
  llvm::DIScope *Mod = getParentModuleOrNull(D);
201
3.71k
  return getContextDescriptor(cast<Decl>(D->getDeclContext()),
202
3.71k
                              Mod ? 
Mod336
:
TheCU3.37k
);
203
3.71k
}
204
205
llvm::DIScope *CGDebugInfo::getContextDescriptor(const Decl *Context,
206
5.11k
                                                 llvm::DIScope *Default) {
207
5.11k
  if (!Context)
208
0
    return Default;
209
5.11k
210
5.11k
  auto I = RegionMap.find(Context);
211
5.11k
  if (I != RegionMap.end()) {
212
1.41k
    llvm::Metadata *V = I->second;
213
1.41k
    return dyn_cast_or_null<llvm::DIScope>(V);
214
1.41k
  }
215
3.69k
216
3.69k
  // Check namespace.
217
3.69k
  if (const auto *NSDecl = dyn_cast<NamespaceDecl>(Context))
218
496
    return getOrCreateNamespace(NSDecl);
219
3.19k
220
3.19k
  if (const auto *RDecl = dyn_cast<RecordDecl>(Context))
221
531
    if (!RDecl->isDependentType())
222
531
      return getOrCreateType(CGM.getContext().getTypeDeclType(RDecl),
223
531
                             TheCU->getFile());
224
2.66k
  return Default;
225
2.66k
}
226
227
18.1k
PrintingPolicy CGDebugInfo::getPrintingPolicy() const {
228
18.1k
  PrintingPolicy PP = CGM.getContext().getPrintingPolicy();
229
18.1k
230
18.1k
  // If we're emitting codeview, it's important to try to match MSVC's naming so
231
18.1k
  // that visualizers written for MSVC will trigger for our class names. In
232
18.1k
  // particular, we can't have spaces between arguments of standard templates
233
18.1k
  // like basic_string and vector.
234
18.1k
  if (CGM.getCodeGenOpts().EmitCodeView)
235
64
    PP.MSVCFormatting = true;
236
18.1k
237
18.1k
  // Apply -fdebug-prefix-map.
238
18.1k
  PP.RemapFilePaths = true;
239
18.1k
  PP.remapPath = [this](StringRef Path) 
{ return remapDIPath(Path); }211
;
240
18.1k
  return PP;
241
18.1k
}
242
243
116k
StringRef CGDebugInfo::getFunctionName(const FunctionDecl *FD) {
244
116k
  assert(FD && "Invalid FunctionDecl!");
245
116k
  IdentifierInfo *FII = FD->getIdentifier();
246
116k
  FunctionTemplateSpecializationInfo *Info =
247
116k
      FD->getTemplateSpecializationInfo();
248
116k
249
116k
  // Emit the unqualified name in normal operation. LLVM and the debugger can
250
116k
  // compute the fully qualified name from the scope chain. If we're only
251
116k
  // emitting line table info, there won't be any scope chains, so emit the
252
116k
  // fully qualified name here so that stack traces are more accurate.
253
116k
  // FIXME: Do this when emitting DWARF as well as when emitting CodeView after
254
116k
  // evaluating the size impact.
255
116k
  bool UseQualifiedName = DebugKind == codegenoptions::DebugLineTablesOnly &&
256
116k
                          
CGM.getCodeGenOpts().EmitCodeView113k
;
257
116k
258
116k
  if (!Info && 
FII98.9k
&&
!UseQualifiedName75.1k
)
259
75.0k
    return FII->getName();
260
41.6k
261
41.6k
  SmallString<128> NS;
262
41.6k
  llvm::raw_svector_ostream OS(NS);
263
41.6k
  if (!UseQualifiedName)
264
41.6k
    FD->printName(OS);
265
17
  else
266
17
    FD->printQualifiedName(OS, getPrintingPolicy());
267
41.6k
268
41.6k
  // Add any template specialization args.
269
41.6k
  if (Info) {
270
17.7k
    const TemplateArgumentList *TArgs = Info->TemplateArguments;
271
17.7k
    printTemplateArgumentList(OS, TArgs->asArray(), getPrintingPolicy());
272
17.7k
  }
273
41.6k
274
41.6k
  // Copy this name on the side and use its reference.
275
41.6k
  return internString(OS.str());
276
41.6k
}
277
278
136
StringRef CGDebugInfo::getObjCMethodName(const ObjCMethodDecl *OMD) {
279
136
  SmallString<256> MethodName;
280
136
  llvm::raw_svector_ostream OS(MethodName);
281
136
  OS << (OMD->isInstanceMethod() ? 
'-'117
:
'+'19
) << '[';
282
136
  const DeclContext *DC = OMD->getDeclContext();
283
136
  if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) {
284
57
    OS << OID->getName();
285
79
  } else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) {
286
62
    OS << OID->getName();
287
62
  } else 
if (const auto *17
OC17
= dyn_cast<ObjCCategoryDecl>(DC)) {
288
8
    if (OC->IsClassExtension()) {
289
5
      OS << OC->getClassInterface()->getName();
290
5
    } else {
291
3
      OS << OC->getIdentifier()->getNameStart() << '('
292
3
         << OC->getIdentifier()->getNameStart() << ')';
293
3
    }
294
9
  } else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) {
295
5
    OS << OCD->getClassInterface()->getName() << '(' << OCD->getName() << ')';
296
5
  } else 
if (4
isa<ObjCProtocolDecl>(DC)4
) {
297
4
    // We can extract the type of the class from the self pointer.
298
4
    if (ImplicitParamDecl *SelfDecl = OMD->getSelfDecl()) {
299
4
      QualType ClassTy =
300
4
          cast<ObjCObjectPointerType>(SelfDecl->getType())->getPointeeType();
301
4
      ClassTy.print(OS, PrintingPolicy(LangOptions()));
302
4
    }
303
4
  }
304
136
  OS << ' ' << OMD->getSelector().getAsString() << ']';
305
136
306
136
  return internString(OS.str());
307
136
}
308
309
7
StringRef CGDebugInfo::getSelectorName(Selector S) {
310
7
  return internString(S.getAsString());
311
7
}
312
313
1.37k
StringRef CGDebugInfo::getClassName(const RecordDecl *RD) {
314
1.37k
  if (isa<ClassTemplateSpecializationDecl>(RD)) {
315
396
    SmallString<128> Name;
316
396
    llvm::raw_svector_ostream OS(Name);
317
396
    RD->getNameForDiagnostic(OS, getPrintingPolicy(),
318
396
                             /*Qualified*/ false);
319
396
320
396
    // Copy this name on the side and use its reference.
321
396
    return internString(Name);
322
396
  }
323
977
324
977
  // quick optimization to avoid having to intern strings that are already
325
977
  // stored reliably elsewhere
326
977
  if (const IdentifierInfo *II = RD->getIdentifier())
327
841
    return II->getName();
328
136
329
136
  // The CodeView printer in LLVM wants to see the names of unnamed types: it is
330
136
  // used to reconstruct the fully qualified type names.
331
136
  if (CGM.getCodeGenOpts().EmitCodeView) {
332
21
    if (const TypedefNameDecl *D = RD->getTypedefNameForAnonDecl()) {
333
1
      assert(RD->getDeclContext() == D->getDeclContext() &&
334
1
             "Typedef should not be in another decl context!");
335
1
      assert(D->getDeclName().getAsIdentifierInfo() &&
336
1
             "Typedef was not named!");
337
1
      return D->getDeclName().getAsIdentifierInfo()->getName();
338
1
    }
339
20
340
20
    if (CGM.getLangOpts().CPlusPlus) {
341
19
      StringRef Name;
342
19
343
19
      ASTContext &Context = CGM.getContext();
344
19
      if (const DeclaratorDecl *DD = Context.getDeclaratorForUnnamedTagDecl(RD))
345
5
        // Anonymous types without a name for linkage purposes have their
346
5
        // declarator mangled in if they have one.
347
5
        Name = DD->getName();
348
14
      else if (const TypedefNameDecl *TND =
349
1
                   Context.getTypedefNameForUnnamedTagDecl(RD))
350
1
        // Anonymous types without a name for linkage purposes have their
351
1
        // associate typedef mangled in if they have one.
352
1
        Name = TND->getName();
353
19
354
19
      if (!Name.empty()) {
355
6
        SmallString<256> UnnamedType("<unnamed-type-");
356
6
        UnnamedType += Name;
357
6
        UnnamedType += '>';
358
6
        return internString(UnnamedType);
359
6
      }
360
129
    }
361
20
  }
362
129
363
129
  return StringRef();
364
129
}
365
366
Optional<llvm::DIFile::ChecksumKind>
367
13.0k
CGDebugInfo::computeChecksum(FileID FID, SmallString<32> &Checksum) const {
368
13.0k
  Checksum.clear();
369
13.0k
370
13.0k
  if (!CGM.getCodeGenOpts().EmitCodeView &&
371
13.0k
      
CGM.getCodeGenOpts().DwarfVersion < 512.9k
)
372
12.9k
    return None;
373
76
374
76
  SourceManager &SM = CGM.getContext().getSourceManager();
375
76
  bool Invalid;
376
76
  const llvm::MemoryBuffer *MemBuffer = SM.getBuffer(FID, &Invalid);
377
76
  if (Invalid)
378
3
    return None;
379
73
380
73
  llvm::MD5 Hash;
381
73
  llvm::MD5::MD5Result Result;
382
73
383
73
  Hash.update(MemBuffer->getBuffer());
384
73
  Hash.final(Result);
385
73
386
73
  Hash.stringifyResult(Result, Checksum);
387
73
  return llvm::DIFile::CSK_MD5;
388
73
}
389
390
Optional<StringRef> CGDebugInfo::getSource(const SourceManager &SM,
391
13.1k
                                           FileID FID) {
392
13.1k
  if (!CGM.getCodeGenOpts().EmbedSource)
393
13.1k
    return None;
394
2
395
2
  bool SourceInvalid = false;
396
2
  StringRef Source = SM.getBufferData(FID, &SourceInvalid);
397
2
398
2
  if (SourceInvalid)
399
0
    return None;
400
2
401
2
  return Source;
402
2
}
403
404
6.42M
llvm::DIFile *CGDebugInfo::getOrCreateFile(SourceLocation Loc) {
405
6.42M
  if (!Loc.isValid())
406
621
    // If Location is not valid then use main input file.
407
621
    return TheCU->getFile();
408
6.42M
409
6.42M
  SourceManager &SM = CGM.getContext().getSourceManager();
410
6.42M
  PresumedLoc PLoc = SM.getPresumedLoc(Loc);
411
6.42M
412
6.42M
  StringRef FileName = PLoc.getFilename();
413
6.42M
  if (PLoc.isInvalid() || FileName.empty())
414
8
    // If the location is not valid then use main input file.
415
8
    return TheCU->getFile();
416
6.42M
417
6.42M
  // Cache the results.
418
6.42M
  auto It = DIFileCache.find(FileName.data());
419
6.42M
  if (It != DIFileCache.end()) {
420
6.41M
    // Verify that the information still exists.
421
6.41M
    if (llvm::Metadata *V = It->second)
422
6.41M
      return cast<llvm::DIFile>(V);
423
10.2k
  }
424
10.2k
425
10.2k
  SmallString<32> Checksum;
426
10.2k
427
10.2k
  // Compute the checksum if possible. If the location is affected by a #line
428
10.2k
  // directive that refers to a file, PLoc will have an invalid FileID, and we
429
10.2k
  // will correctly get no checksum.
430
10.2k
  Optional<llvm::DIFile::ChecksumKind> CSKind =
431
10.2k
      computeChecksum(PLoc.getFileID(), Checksum);
432
10.2k
  Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo;
433
10.2k
  if (CSKind)
434
36
    CSInfo.emplace(*CSKind, Checksum);
435
10.2k
  return createFile(FileName, CSInfo, getSource(SM, SM.getFileID(Loc)));
436
10.2k
}
437
438
llvm::DIFile *
439
CGDebugInfo::createFile(StringRef FileName,
440
                        Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo,
441
10.2k
                        Optional<StringRef> Source) {
442
10.2k
  StringRef Dir;
443
10.2k
  StringRef File;
444
10.2k
  std::string RemappedFile = remapDIPath(FileName);
445
10.2k
  std::string CurDir = remapDIPath(getCurrentDirname());
446
10.2k
  SmallString<128> DirBuf;
447
10.2k
  SmallString<128> FileBuf;
448
10.2k
  if (llvm::sys::path::is_absolute(RemappedFile)) {
449
10.1k
    // Strip the common prefix (if it is more than just "/") from current
450
10.1k
    // directory and FileName for a more space-efficient encoding.
451
10.1k
    auto FileIt = llvm::sys::path::begin(RemappedFile);
452
10.1k
    auto FileE = llvm::sys::path::end(RemappedFile);
453
10.1k
    auto CurDirIt = llvm::sys::path::begin(CurDir);
454
10.1k
    auto CurDirE = llvm::sys::path::end(CurDir);
455
72.1k
    for (; CurDirIt != CurDirE && 
*CurDirIt == *FileIt72.1k
;
++CurDirIt, ++FileIt61.9k
)
456
61.9k
      llvm::sys::path::append(DirBuf, *CurDirIt);
457
10.1k
    if (std::distance(llvm::sys::path::begin(CurDir), CurDirIt) == 1) {
458
54
      // Don't strip the common prefix if it is only the root "/"
459
54
      // since that would make LLVM diagnostic locations confusing.
460
54
      Dir = {};
461
54
      File = RemappedFile;
462
10.1k
    } else {
463
78.3k
      for (; FileIt != FileE; 
++FileIt68.2k
)
464
68.2k
        llvm::sys::path::append(FileBuf, *FileIt);
465
10.1k
      Dir = DirBuf;
466
10.1k
      File = FileBuf;
467
10.1k
    }
468
10.1k
  } else {
469
50
    Dir = CurDir;
470
50
    File = RemappedFile;
471
50
  }
472
10.2k
  llvm::DIFile *F = DBuilder.createFile(File, Dir, CSInfo, Source);
473
10.2k
  DIFileCache[FileName.data()].reset(F);
474
10.2k
  return F;
475
10.2k
}
476
477
29.3k
std::string CGDebugInfo::remapDIPath(StringRef Path) const {
478
29.3k
  for (const auto &Entry : DebugPrefixMap)
479
34
    if (Path.startswith(Entry.first))
480
18
      return (Twine(Entry.second) + Path.substr(Entry.first.size())).str();
481
29.3k
  
return Path.str()29.2k
;
482
29.3k
}
483
484
6.61M
unsigned CGDebugInfo::getLineNumber(SourceLocation Loc) {
485
6.61M
  if (Loc.isInvalid() && 
CurLoc.isInvalid()1.34k
)
486
771
    return 0;
487
6.61M
  SourceManager &SM = CGM.getContext().getSourceManager();
488
6.61M
  PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? 
Loc6.61M
:
CurLoc569
);
489
6.61M
  return PLoc.isValid() ? PLoc.getLine() : 
00
;
490
6.61M
}
491
492
6.37M
unsigned CGDebugInfo::getColumnNumber(SourceLocation Loc, bool Force) {
493
6.37M
  // We may not want column information at all.
494
6.37M
  if (!Force && !CGM.getCodeGenOpts().DebugColumnInfo)
495
73.8k
    return 0;
496
6.30M
497
6.30M
  // If the location is invalid then use the current column.
498
6.30M
  if (Loc.isInvalid() && 
CurLoc.isInvalid()0
)
499
0
    return 0;
500
6.30M
  SourceManager &SM = CGM.getContext().getSourceManager();
501
6.30M
  PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : 
CurLoc0
);
502
6.30M
  return PLoc.isValid() ? PLoc.getColumn() : 
00
;
503
6.30M
}
504
505
13.1k
StringRef CGDebugInfo::getCurrentDirname() {
506
13.1k
  if (!CGM.getCodeGenOpts().DebugCompilationDir.empty())
507
11.8k
    return CGM.getCodeGenOpts().DebugCompilationDir;
508
1.30k
509
1.30k
  if (!CWDName.empty())
510
661
    return CWDName;
511
646
  SmallString<256> CWD;
512
646
  llvm::sys::fs::current_path(CWD);
513
646
  return CWDName = internString(CWD);
514
646
}
515
516
2.92k
void CGDebugInfo::CreateCompileUnit() {
517
2.92k
  SmallString<32> Checksum;
518
2.92k
  Optional<llvm::DIFile::ChecksumKind> CSKind;
519
2.92k
  Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo;
520
2.92k
521
2.92k
  // Should we be asking the SourceManager for the main file name, instead of
522
2.92k
  // accepting it as an argument? This just causes the main file name to
523
2.92k
  // mismatch with source locations and create extra lexical scopes or
524
2.92k
  // mismatched debug info (a CU with a DW_AT_file of "-", because that's what
525
2.92k
  // the driver passed, but functions/other things have DW_AT_file of "<stdin>"
526
2.92k
  // because that's what the SourceManager says)
527
2.92k
528
2.92k
  // Get absolute path name.
529
2.92k
  SourceManager &SM = CGM.getContext().getSourceManager();
530
2.92k
  std::string MainFileName = CGM.getCodeGenOpts().MainFileName;
531
2.92k
  if (MainFileName.empty())
532
610
    MainFileName = "<stdin>";
533
2.92k
534
2.92k
  // The main file name provided via the "-main-file-name" option contains just
535
2.92k
  // the file name itself with no path information. This file name may have had
536
2.92k
  // a relative path, so we look into the actual file entry for the main
537
2.92k
  // file to determine the real absolute path for the file.
538
2.92k
  std::string MainFileDir;
539
2.92k
  if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
540
2.78k
    MainFileDir = remapDIPath(MainFile->getDir()->getName());
541
2.78k
    if (MainFileDir != ".") {
542
2.76k
      llvm::SmallString<1024> MainFileDirSS(MainFileDir);
543
2.76k
      llvm::sys::path::append(MainFileDirSS, MainFileName);
544
2.76k
      MainFileName = MainFileDirSS.str();
545
2.76k
    }
546
2.78k
    // If the main file name provided is identical to the input file name, and
547
2.78k
    // if the input file is a preprocessed source, use the module name for
548
2.78k
    // debug info. The module name comes from the name specified in the first
549
2.78k
    // linemarker if the input is a preprocessed source.
550
2.78k
    if (MainFile->getName() == MainFileName &&
551
2.78k
        FrontendOptions::getInputKindForExtension(
552
2.29k
            MainFile->getName().rsplit('.').second)
553
2.29k
            .isPreprocessed())
554
0
      MainFileName = CGM.getModule().getName().str();
555
2.78k
556
2.78k
    CSKind = computeChecksum(SM.getMainFileID(), Checksum);
557
2.78k
  }
558
2.92k
559
2.92k
  llvm::dwarf::SourceLanguage LangTag;
560
2.92k
  const LangOptions &LO = CGM.getLangOpts();
561
2.92k
  if (LO.CPlusPlus) {
562
2.58k
    if (LO.ObjC)
563
35
      LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus;
564
2.54k
    else
565
2.54k
      LangTag = llvm::dwarf::DW_LANG_C_plus_plus;
566
2.58k
  } else 
if (340
LO.ObjC340
) {
567
75
    LangTag = llvm::dwarf::DW_LANG_ObjC;
568
265
  } else if (LO.RenderScript) {
569
1
    LangTag = llvm::dwarf::DW_LANG_GOOGLE_RenderScript;
570
264
  } else if (LO.C99) {
571
264
    LangTag = llvm::dwarf::DW_LANG_C99;
572
264
  } else {
573
0
    LangTag = llvm::dwarf::DW_LANG_C89;
574
0
  }
575
2.92k
576
2.92k
  std::string Producer = getClangFullVersion();
577
2.92k
578
2.92k
  // Figure out which version of the ObjC runtime we have.
579
2.92k
  unsigned RuntimeVers = 0;
580
2.92k
  if (LO.ObjC)
581
110
    RuntimeVers = LO.ObjCRuntime.isNonFragile() ? 
2104
:
16
;
582
2.92k
583
2.92k
  llvm::DICompileUnit::DebugEmissionKind EmissionKind;
584
2.92k
  switch (DebugKind) {
585
2.92k
  case codegenoptions::NoDebugInfo:
586
62
  case codegenoptions::LocTrackingOnly:
587
62
    EmissionKind = llvm::DICompileUnit::NoDebug;
588
62
    break;
589
2.24k
  case codegenoptions::DebugLineTablesOnly:
590
2.24k
    EmissionKind = llvm::DICompileUnit::LineTablesOnly;
591
2.24k
    break;
592
62
  case codegenoptions::DebugDirectivesOnly:
593
19
    EmissionKind = llvm::DICompileUnit::DebugDirectivesOnly;
594
19
    break;
595
595
  case codegenoptions::LimitedDebugInfo:
596
595
  case codegenoptions::FullDebugInfo:
597
595
    EmissionKind = llvm::DICompileUnit::FullDebug;
598
595
    break;
599
2.92k
  }
600
2.92k
601
2.92k
  uint64_t DwoId = 0;
602
2.92k
  auto &CGOpts = CGM.getCodeGenOpts();
603
2.92k
  // The DIFile used by the CU is distinct from the main source
604
2.92k
  // file. Its directory part specifies what becomes the
605
2.92k
  // DW_AT_comp_dir (the compilation directory), even if the source
606
2.92k
  // file was specified with an absolute path.
607
2.92k
  if (CSKind)
608
37
    CSInfo.emplace(*CSKind, Checksum);
609
2.92k
  llvm::DIFile *CUFile = DBuilder.createFile(
610
2.92k
      remapDIPath(MainFileName), remapDIPath(getCurrentDirname()), CSInfo,
611
2.92k
      getSource(SM, SM.getMainFileID()));
612
2.92k
613
2.92k
  // Create new compile unit.
614
2.92k
  TheCU = DBuilder.createCompileUnit(
615
2.92k
      LangTag, CUFile, CGOpts.EmitVersionIdentMetadata ? 
Producer2.92k
:
""2
,
616
2.92k
      LO.Optimize || 
CGOpts.PrepareForLTO671
||
CGOpts.PrepareForThinLTO665
,
617
2.92k
      CGOpts.DwarfDebugFlags, RuntimeVers, CGOpts.SplitDwarfFile, EmissionKind,
618
2.92k
      DwoId, CGOpts.SplitDwarfInlining, CGOpts.DebugInfoForProfiling,
619
2.92k
      CGM.getTarget().getTriple().isNVPTX()
620
2.92k
          ? 
llvm::DICompileUnit::DebugNameTableKind::None6
621
2.92k
          : static_cast<llvm::DICompileUnit::DebugNameTableKind>(
622
2.91k
                CGOpts.DebugNameTable),
623
2.92k
      CGOpts.DebugRangesBaseAddress);
624
2.92k
}
625
626
1.77k
llvm::DIType *CGDebugInfo::CreateType(const BuiltinType *BT) {
627
1.77k
  llvm::dwarf::TypeKind Encoding;
628
1.77k
  StringRef BTName;
629
1.77k
  switch (BT->getKind()) {
630
1.77k
#define BUILTIN_TYPE(Id, SingletonId)
631
1.77k
#define PLACEHOLDER_TYPE(Id, SingletonId) 
case BuiltinType::Id:0
632
1.77k
#include "clang/AST/BuiltinTypes.def"
633
0
  case BuiltinType::Dependent:
634
0
    llvm_unreachable("Unexpected builtin type");
635
2
  case BuiltinType::NullPtr:
636
2
    return DBuilder.createNullPtrType();
637
920
  case BuiltinType::Void:
638
920
    return nullptr;
639
12
  case BuiltinType::ObjCClass:
640
12
    if (!ClassTy)
641
7
      ClassTy =
642
7
          DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
643
7
                                     "objc_class", TheCU, TheCU->getFile(), 0);
644
12
    return ClassTy;
645
23
  case BuiltinType::ObjCId: {
646
23
    // typedef struct objc_class *Class;
647
23
    // typedef struct objc_object {
648
23
    //  Class isa;
649
23
    // } *id;
650
23
651
23
    if (ObjTy)
652
0
      return ObjTy;
653
23
654
23
    if (!ClassTy)
655
17
      ClassTy =
656
17
          DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
657
17
                                     "objc_class", TheCU, TheCU->getFile(), 0);
658
23
659
23
    unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
660
23
661
23
    auto *ISATy = DBuilder.createPointerType(ClassTy, Size);
662
23
663
23
    ObjTy = DBuilder.createStructType(TheCU, "objc_object", TheCU->getFile(), 0,
664
23
                                      0, 0, llvm::DINode::FlagZero, nullptr,
665
23
                                      llvm::DINodeArray());
666
23
667
23
    DBuilder.replaceArrays(
668
23
        ObjTy, DBuilder.getOrCreateArray(&*DBuilder.createMemberType(
669
23
                   ObjTy, "isa", TheCU->getFile(), 0, Size, 0, 0,
670
23
                   llvm::DINode::FlagZero, ISATy)));
671
23
    return ObjTy;
672
23
  }
673
47
  case BuiltinType::ObjCSel: {
674
47
    if (!SelTy)
675
47
      SelTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
676
47
                                         "objc_selector", TheCU,
677
47
                                         TheCU->getFile(), 0);
678
47
    return SelTy;
679
23
  }
680
23
681
23
#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix)                   \
682
23
  case BuiltinType::Id:                                                        \
683
0
    return getOrCreateStructPtrType("opencl_" #ImgType "_" #Suffix "_t",       \
684
0
                                    SingletonId);
685
47
#include "clang/Basic/OpenCLImageTypes.def"
686
23
  case BuiltinType::OCLSampler:
687
0
    return getOrCreateStructPtrType("opencl_sampler_t", OCLSamplerDITy);
688
23
  case BuiltinType::OCLEvent:
689
0
    return getOrCreateStructPtrType("opencl_event_t", OCLEventDITy);
690
23
  case BuiltinType::OCLClkEvent:
691
0
    return getOrCreateStructPtrType("opencl_clk_event_t", OCLClkEventDITy);
692
23
  case BuiltinType::OCLQueue:
693
1
    return getOrCreateStructPtrType("opencl_queue_t", OCLQueueDITy);
694
23
  case BuiltinType::OCLReserveID:
695
0
    return getOrCreateStructPtrType("opencl_reserve_id_t", OCLReserveIDDITy);
696
23
#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
697
23
  case BuiltinType::Id: \
698
0
    return getOrCreateStructPtrType("opencl_" #ExtType, Id##Ty);
699
23
#include 
"clang/Basic/OpenCLExtensionTypes.def"0
700
23
701
23
  case BuiltinType::UChar:
702
17
  case BuiltinType::Char_U:
703
17
    Encoding = llvm::dwarf::DW_ATE_unsigned_char;
704
17
    break;
705
81
  case BuiltinType::Char_S:
706
81
  case BuiltinType::SChar:
707
81
    Encoding = llvm::dwarf::DW_ATE_signed_char;
708
81
    break;
709
81
  case BuiltinType::Char8:
710
3
  case BuiltinType::Char16:
711
3
  case BuiltinType::Char32:
712
3
    Encoding = llvm::dwarf::DW_ATE_UTF;
713
3
    break;
714
121
  case BuiltinType::UShort:
715
121
  case BuiltinType::UInt:
716
121
  case BuiltinType::UInt128:
717
121
  case BuiltinType::ULong:
718
121
  case BuiltinType::WChar_U:
719
121
  case BuiltinType::ULongLong:
720
121
    Encoding = llvm::dwarf::DW_ATE_unsigned;
721
121
    break;
722
438
  case BuiltinType::Short:
723
438
  case BuiltinType::Int:
724
438
  case BuiltinType::Int128:
725
438
  case BuiltinType::Long:
726
438
  case BuiltinType::WChar_S:
727
438
  case BuiltinType::LongLong:
728
438
    Encoding = llvm::dwarf::DW_ATE_signed;
729
438
    break;
730
438
  case BuiltinType::Bool:
731
33
    Encoding = llvm::dwarf::DW_ATE_boolean;
732
33
    break;
733
438
  case BuiltinType::Half:
734
78
  case BuiltinType::Float:
735
78
  case BuiltinType::LongDouble:
736
78
  case BuiltinType::Float16:
737
78
  case BuiltinType::Float128:
738
78
  case BuiltinType::Double:
739
78
    // FIXME: For targets where long double and __float128 have the same size,
740
78
    // they are currently indistinguishable in the debugger without some
741
78
    // special treatment. However, there is currently no consensus on encoding
742
78
    // and this should be updated once a DWARF encoding exists for distinct
743
78
    // floating point types of the same size.
744
78
    Encoding = llvm::dwarf::DW_ATE_float;
745
78
    break;
746
78
  case BuiltinType::ShortAccum:
747
0
  case BuiltinType::Accum:
748
0
  case BuiltinType::LongAccum:
749
0
  case BuiltinType::ShortFract:
750
0
  case BuiltinType::Fract:
751
0
  case BuiltinType::LongFract:
752
0
  case BuiltinType::SatShortFract:
753
0
  case BuiltinType::SatFract:
754
0
  case BuiltinType::SatLongFract:
755
0
  case BuiltinType::SatShortAccum:
756
0
  case BuiltinType::SatAccum:
757
0
  case BuiltinType::SatLongAccum:
758
0
    Encoding = llvm::dwarf::DW_ATE_signed_fixed;
759
0
    break;
760
0
  case BuiltinType::UShortAccum:
761
0
  case BuiltinType::UAccum:
762
0
  case BuiltinType::ULongAccum:
763
0
  case BuiltinType::UShortFract:
764
0
  case BuiltinType::UFract:
765
0
  case BuiltinType::ULongFract:
766
0
  case BuiltinType::SatUShortAccum:
767
0
  case BuiltinType::SatUAccum:
768
0
  case BuiltinType::SatULongAccum:
769
0
  case BuiltinType::SatUShortFract:
770
0
  case BuiltinType::SatUFract:
771
0
  case BuiltinType::SatULongFract:
772
0
    Encoding = llvm::dwarf::DW_ATE_unsigned_fixed;
773
0
    break;
774
771
  }
775
771
776
771
  switch (BT->getKind()) {
777
771
  case BuiltinType::Long:
778
21
    BTName = "long int";
779
21
    break;
780
771
  case BuiltinType::LongLong:
781
13
    BTName = "long long int";
782
13
    break;
783
771
  case BuiltinType::ULong:
784
47
    BTName = "long unsigned int";
785
47
    break;
786
771
  case BuiltinType::ULongLong:
787
13
    BTName = "long long unsigned int";
788
13
    break;
789
771
  default:
790
677
    BTName = BT->getName(CGM.getLangOpts());
791
677
    break;
792
771
  }
793
771
  // Bit size and offset of the type.
794
771
  uint64_t Size = CGM.getContext().getTypeSize(BT);
795
771
  return DBuilder.createBasicType(BTName, Size, Encoding);
796
771
}
797
798
4
llvm::DIType *CGDebugInfo::CreateType(const ComplexType *Ty) {
799
4
  // Bit size and offset of the type.
800
4
  llvm::dwarf::TypeKind Encoding = llvm::dwarf::DW_ATE_complex_float;
801
4
  if (Ty->isComplexIntegerType())
802
0
    Encoding = llvm::dwarf::DW_ATE_lo_user;
803
4
804
4
  uint64_t Size = CGM.getContext().getTypeSize(Ty);
805
4
  return DBuilder.createBasicType("complex", Size, Encoding);
806
4
}
807
808
llvm::DIType *CGDebugInfo::CreateQualifiedType(QualType Ty,
809
458
                                               llvm::DIFile *Unit) {
810
458
  QualifierCollector Qc;
811
458
  const Type *T = Qc.strip(Ty);
812
458
813
458
  // Ignore these qualifiers for now.
814
458
  Qc.removeObjCGCAttr();
815
458
  Qc.removeAddressSpace();
816
458
  Qc.removeObjCLifetime();
817
458
818
458
  // We will create one Derived type for one qualifier and recurse to handle any
819
458
  // additional ones.
820
458
  llvm::dwarf::Tag Tag;
821
458
  if (Qc.hasConst()) {
822
251
    Tag = llvm::dwarf::DW_TAG_const_type;
823
251
    Qc.removeConst();
824
251
  } else 
if (207
Qc.hasVolatile()207
) {
825
3
    Tag = llvm::dwarf::DW_TAG_volatile_type;
826
3
    Qc.removeVolatile();
827
204
  } else if (Qc.hasRestrict()) {
828
56
    Tag = llvm::dwarf::DW_TAG_restrict_type;
829
56
    Qc.removeRestrict();
830
148
  } else {
831
148
    assert(Qc.empty() && "Unknown type qualifier for debug info");
832
148
    return getOrCreateType(QualType(T, 0), Unit);
833
148
  }
834
310
835
310
  auto *FromTy = getOrCreateType(Qc.apply(CGM.getContext(), T), Unit);
836
310
837
310
  // No need to fill in the Name, Line, Size, Alignment, Offset in case of
838
310
  // CVR derived types.
839
310
  return DBuilder.createQualifiedType(Tag, FromTy);
840
310
}
841
842
llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectPointerType *Ty,
843
142
                                      llvm::DIFile *Unit) {
844
142
845
142
  // The frontend treats 'id' as a typedef to an ObjCObjectType,
846
142
  // whereas 'id<protocol>' is treated as an ObjCPointerType. For the
847
142
  // debug info, we want to emit 'id' in both cases.
848
142
  if (Ty->isObjCQualifiedIdType())
849
1
    return getOrCreateType(CGM.getContext().getObjCIdType(), Unit);
850
141
851
141
  return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
852
141
                               Ty->getPointeeType(), Unit);
853
141
}
854
855
llvm::DIType *CGDebugInfo::CreateType(const PointerType *Ty,
856
1.05k
                                      llvm::DIFile *Unit) {
857
1.05k
  return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
858
1.05k
                               Ty->getPointeeType(), Unit);
859
1.05k
}
860
861
/// \return whether a C++ mangling exists for the type defined by TD.
862
1.54k
static bool hasCXXMangling(const TagDecl *TD, llvm::DICompileUnit *TheCU) {
863
1.54k
  switch (TheCU->getSourceLanguage()) {
864
1.54k
  case llvm::dwarf::DW_LANG_C_plus_plus:
865
1.20k
    return true;
866
1.54k
  case llvm::dwarf::DW_LANG_ObjC_plus_plus:
867
116
    return isa<CXXRecordDecl>(TD) || 
isa<EnumDecl>(TD)16
;
868
1.54k
  default:
869
222
    return false;
870
1.54k
  }
871
1.54k
}
872
873
// Determines if the debug info for this tag declaration needs a type
874
// identifier. The purpose of the unique identifier is to deduplicate type
875
// information for identical types across TUs. Because of the C++ one definition
876
// rule (ODR), it is valid to assume that the type is defined the same way in
877
// every TU and its debug info is equivalent.
878
//
879
// C does not have the ODR, and it is common for codebases to contain multiple
880
// different definitions of a struct with the same name in different TUs.
881
// Therefore, if the type doesn't have a C++ mangling, don't give it an
882
// identifer. Type information in C is smaller and simpler than C++ type
883
// information, so the increase in debug info size is negligible.
884
//
885
// If the type is not externally visible, it should be unique to the current TU,
886
// and should not need an identifier to participate in type deduplication.
887
// However, when emitting CodeView, the format internally uses these
888
// unique type name identifers for references between debug info. For example,
889
// the method of a class in an anonymous namespace uses the identifer to refer
890
// to its parent class. The Microsoft C++ ABI attempts to provide unique names
891
// for such types, so when emitting CodeView, always use identifiers for C++
892
// types. This may create problems when attempting to emit CodeView when the MS
893
// C++ ABI is not in use.
894
static bool needsTypeIdentifier(const TagDecl *TD, CodeGenModule &CGM,
895
1.54k
                                llvm::DICompileUnit *TheCU) {
896
1.54k
  // We only add a type identifier for types with C++ name mangling.
897
1.54k
  if (!hasCXXMangling(TD, TheCU))
898
222
    return false;
899
1.32k
900
1.32k
  // Externally visible types with C++ mangling need a type identifier.
901
1.32k
  if (TD->isExternallyVisible())
902
1.19k
    return true;
903
131
904
131
  // CodeView types with C++ mangling need a type identifier.
905
131
  if (CGM.getCodeGenOpts().EmitCodeView)
906
17
    return true;
907
114
908
114
  return false;
909
114
}
910
911
// Returns a unique type identifier string if one exists, or an empty string.
912
static SmallString<256> getTypeIdentifier(const TagType *Ty, CodeGenModule &CGM,
913
1.54k
                                          llvm::DICompileUnit *TheCU) {
914
1.54k
  SmallString<256> Identifier;
915
1.54k
  const TagDecl *TD = Ty->getDecl();
916
1.54k
917
1.54k
  if (!needsTypeIdentifier(TD, CGM, TheCU))
918
336
    return Identifier;
919
1.20k
  if (const auto *RD = dyn_cast<CXXRecordDecl>(TD))
920
1.05k
    if (RD->getDefinition())
921
973
      if (RD->isDynamicClass() &&
922
973
          
CGM.getVTableLinkage(RD) == llvm::GlobalValue::ExternalLinkage237
)
923
107
        return Identifier;
924
1.10k
925
1.10k
  // TODO: This is using the RTTI name. Is there a better way to get
926
1.10k
  // a unique string for a type?
927
1.10k
  llvm::raw_svector_ostream Out(Identifier);
928
1.10k
  CGM.getCXXABI().getMangleContext().mangleCXXRTTIName(QualType(Ty, 0), Out);
929
1.10k
  return Identifier;
930
1.10k
}
931
932
/// \return the appropriate DWARF tag for a composite type.
933
1.32k
static llvm::dwarf::Tag getTagForRecord(const RecordDecl *RD) {
934
1.32k
  llvm::dwarf::Tag Tag;
935
1.32k
  if (RD->isStruct() || 
RD->isInterface()400
)
936
922
    Tag = llvm::dwarf::DW_TAG_structure_type;
937
400
  else if (RD->isUnion())
938
54
    Tag = llvm::dwarf::DW_TAG_union_type;
939
346
  else {
940
346
    // FIXME: This could be a struct type giving a default visibility different
941
346
    // than C++ class type, but needs llvm metadata changes first.
942
346
    assert(RD->isClass());
943
346
    Tag = llvm::dwarf::DW_TAG_class_type;
944
346
  }
945
1.32k
  return Tag;
946
1.32k
}
947
948
llvm::DICompositeType *
949
CGDebugInfo::getOrCreateRecordFwdDecl(const RecordType *Ty,
950
347
                                      llvm::DIScope *Ctx) {
951
347
  const RecordDecl *RD = Ty->getDecl();
952
347
  if (llvm::DIType *T = getTypeOrNull(CGM.getContext().getRecordType(RD)))
953
4
    return cast<llvm::DICompositeType>(T);
954
343
  llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
955
343
  unsigned Line = getLineNumber(RD->getLocation());
956
343
  StringRef RDName = getClassName(RD);
957
343
958
343
  uint64_t Size = 0;
959
343
  uint32_t Align = 0;
960
343
961
343
  // Create the type.
962
343
  SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
963
343
  llvm::DICompositeType *RetTy = DBuilder.createReplaceableCompositeType(
964
343
      getTagForRecord(RD), RDName, Ctx, DefUnit, Line, 0, Size, Align,
965
343
      llvm::DINode::FlagFwdDecl, Identifier);
966
343
  if (CGM.getCodeGenOpts().DebugFwdTemplateParams)
967
1
    if (auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD))
968
1
      DBuilder.replaceArrays(RetTy, llvm::DINodeArray(),
969
1
                             CollectCXXTemplateParams(TSpecial, DefUnit));
970
343
  ReplaceMap.emplace_back(
971
343
      std::piecewise_construct, std::make_tuple(Ty),
972
343
      std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
973
343
  return RetTy;
974
343
}
975
976
llvm::DIType *CGDebugInfo::CreatePointerLikeType(llvm::dwarf::Tag Tag,
977
                                                 const Type *Ty,
978
                                                 QualType PointeeTy,
979
1.37k
                                                 llvm::DIFile *Unit) {
980
1.37k
  // Bit size, align and offset of the type.
981
1.37k
  // Size is always the size of a pointer. We can't use getTypeSize here
982
1.37k
  // because that does not return the correct value for references.
983
1.37k
  unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(PointeeTy);
984
1.37k
  uint64_t Size = CGM.getTarget().getPointerWidth(AddressSpace);
985
1.37k
  auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
986
1.37k
  Optional<unsigned> DWARFAddressSpace =
987
1.37k
      CGM.getTarget().getDWARFAddressSpace(AddressSpace);
988
1.37k
989
1.37k
  if (Tag == llvm::dwarf::DW_TAG_reference_type ||
990
1.37k
      
Tag == llvm::dwarf::DW_TAG_rvalue_reference_type1.21k
)
991
179
    return DBuilder.createReferenceType(Tag, getOrCreateType(PointeeTy, Unit),
992
179
                                        Size, Align, DWARFAddressSpace);
993
1.20k
  else
994
1.20k
    return DBuilder.createPointerType(getOrCreateType(PointeeTy, Unit), Size,
995
1.20k
                                      Align, DWARFAddressSpace);
996
1.37k
}
997
998
llvm::DIType *CGDebugInfo::getOrCreateStructPtrType(StringRef Name,
999
1
                                                    llvm::DIType *&Cache) {
1000
1
  if (Cache)
1001
0
    return Cache;
1002
1
  Cache = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, Name,
1003
1
                                     TheCU, TheCU->getFile(), 0);
1004
1
  unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
1005
1
  Cache = DBuilder.createPointerType(Cache, Size);
1006
1
  return Cache;
1007
1
}
1008
1009
uint64_t CGDebugInfo::collectDefaultElementTypesForBlockPointer(
1010
    const BlockPointerType *Ty, llvm::DIFile *Unit, llvm::DIDerivedType *DescTy,
1011
20
    unsigned LineNo, SmallVectorImpl<llvm::Metadata *> &EltTys) {
1012
20
  QualType FType;
1013
20
1014
20
  // Advanced by calls to CreateMemberType in increments of FType, then
1015
20
  // returned as the overall size of the default elements.
1016
20
  uint64_t FieldOffset = 0;
1017
20
1018
20
  // Blocks in OpenCL have unique constraints which make the standard fields
1019
20
  // redundant while requiring size and align fields for enqueue_kernel. See
1020
20
  // initializeForBlockHeader in CGBlocks.cpp
1021
20
  if (CGM.getLangOpts().OpenCL) {
1022
4
    FType = CGM.getContext().IntTy;
1023
4
    EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset));
1024
4
    EltTys.push_back(CreateMemberType(Unit, FType, "__align", &FieldOffset));
1025
16
  } else {
1026
16
    FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
1027
16
    EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
1028
16
    FType = CGM.getContext().IntTy;
1029
16
    EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
1030
16
    EltTys.push_back(CreateMemberType(Unit, FType, "__reserved", &FieldOffset));
1031
16
    FType = CGM.getContext().getPointerType(Ty->getPointeeType());
1032
16
    EltTys.push_back(CreateMemberType(Unit, FType, "__FuncPtr", &FieldOffset));
1033
16
    FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
1034
16
    uint64_t FieldSize = CGM.getContext().getTypeSize(Ty);
1035
16
    uint32_t FieldAlign = CGM.getContext().getTypeAlign(Ty);
1036
16
    EltTys.push_back(DBuilder.createMemberType(
1037
16
        Unit, "__descriptor", nullptr, LineNo, FieldSize, FieldAlign,
1038
16
        FieldOffset, llvm::DINode::FlagZero, DescTy));
1039
16
    FieldOffset += FieldSize;
1040
16
  }
1041
20
1042
20
  return FieldOffset;
1043
20
}
1044
1045
llvm::DIType *CGDebugInfo::CreateType(const BlockPointerType *Ty,
1046
20
                                      llvm::DIFile *Unit) {
1047
20
  SmallVector<llvm::Metadata *, 8> EltTys;
1048
20
  QualType FType;
1049
20
  uint64_t FieldOffset;
1050
20
  llvm::DINodeArray Elements;
1051
20
1052
20
  FieldOffset = 0;
1053
20
  FType = CGM.getContext().UnsignedLongTy;
1054
20
  EltTys.push_back(CreateMemberType(Unit, FType, "reserved", &FieldOffset));
1055
20
  EltTys.push_back(CreateMemberType(Unit, FType, "Size", &FieldOffset));
1056
20
1057
20
  Elements = DBuilder.getOrCreateArray(EltTys);
1058
20
  EltTys.clear();
1059
20
1060
20
  llvm::DINode::DIFlags Flags = llvm::DINode::FlagAppleBlock;
1061
20
1062
20
  auto *EltTy =
1063
20
      DBuilder.createStructType(Unit, "__block_descriptor", nullptr, 0,
1064
20
                                FieldOffset, 0, Flags, nullptr, Elements);
1065
20
1066
20
  // Bit size, align and offset of the type.
1067
20
  uint64_t Size = CGM.getContext().getTypeSize(Ty);
1068
20
1069
20
  auto *DescTy = DBuilder.createPointerType(EltTy, Size);
1070
20
1071
20
  FieldOffset = collectDefaultElementTypesForBlockPointer(Ty, Unit, DescTy,
1072
20
                                                          0, EltTys);
1073
20
1074
20
  Elements = DBuilder.getOrCreateArray(EltTys);
1075
20
1076
20
  // The __block_literal_generic structs are marked with a special
1077
20
  // DW_AT_APPLE_BLOCK attribute and are an implementation detail only
1078
20
  // the debugger needs to know about. To allow type uniquing, emit
1079
20
  // them without a name or a location.
1080
20
  EltTy = DBuilder.createStructType(Unit, "", nullptr, 0, FieldOffset, 0,
1081
20
                                    Flags, nullptr, Elements);
1082
20
1083
20
  return DBuilder.createPointerType(EltTy, Size);
1084
20
}
1085
1086
llvm::DIType *CGDebugInfo::CreateType(const TemplateSpecializationType *Ty,
1087
5
                                      llvm::DIFile *Unit) {
1088
5
  assert(Ty->isTypeAlias());
1089
5
  llvm::DIType *Src = getOrCreateType(Ty->getAliasedType(), Unit);
1090
5
1091
5
  auto *AliasDecl =
1092
5
      cast<TypeAliasTemplateDecl>(Ty->getTemplateName().getAsTemplateDecl())
1093
5
          ->getTemplatedDecl();
1094
5
1095
5
  if (AliasDecl->hasAttr<NoDebugAttr>())
1096
1
    return Src;
1097
4
1098
4
  SmallString<128> NS;
1099
4
  llvm::raw_svector_ostream OS(NS);
1100
4
  Ty->getTemplateName().print(OS, getPrintingPolicy(), /*qualified*/ false);
1101
4
  printTemplateArgumentList(OS, Ty->template_arguments(), getPrintingPolicy());
1102
4
1103
4
  SourceLocation Loc = AliasDecl->getLocation();
1104
4
  return DBuilder.createTypedef(Src, OS.str(), getOrCreateFile(Loc),
1105
4
                                getLineNumber(Loc),
1106
4
                                getDeclContextDescriptor(AliasDecl));
1107
4
}
1108
1109
llvm::DIType *CGDebugInfo::CreateType(const TypedefType *Ty,
1110
312
                                      llvm::DIFile *Unit) {
1111
312
  llvm::DIType *Underlying =
1112
312
      getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit);
1113
312
1114
312
  if (Ty->getDecl()->hasAttr<NoDebugAttr>())
1115
1
    return Underlying;
1116
311
1117
311
  // We don't set size information, but do specify where the typedef was
1118
311
  // declared.
1119
311
  SourceLocation Loc = Ty->getDecl()->getLocation();
1120
311
1121
311
  // Typedefs are derived from some other type.
1122
311
  return DBuilder.createTypedef(Underlying, Ty->getDecl()->getName(),
1123
311
                                getOrCreateFile(Loc), getLineNumber(Loc),
1124
311
                                getDeclContextDescriptor(Ty->getDecl()));
1125
311
}
1126
1127
3.26k
static unsigned getDwarfCC(CallingConv CC) {
1128
3.26k
  switch (CC) {
1129
3.26k
  case CC_C:
1130
3.11k
    // Avoid emitting DW_AT_calling_convention if the C convention was used.
1131
3.11k
    return 0;
1132
3.26k
1133
3.26k
  case CC_X86StdCall:
1134
2
    return llvm::dwarf::DW_CC_BORLAND_stdcall;
1135
3.26k
  case CC_X86FastCall:
1136
2
    return llvm::dwarf::DW_CC_BORLAND_msfastcall;
1137
3.26k
  case CC_X86ThisCall:
1138
117
    return llvm::dwarf::DW_CC_BORLAND_thiscall;
1139
3.26k
  case CC_X86VectorCall:
1140
2
    return llvm::dwarf::DW_CC_LLVM_vectorcall;
1141
3.26k
  case CC_X86Pascal:
1142
1
    return llvm::dwarf::DW_CC_BORLAND_pascal;
1143
3.26k
  case CC_Win64:
1144
1
    return llvm::dwarf::DW_CC_LLVM_Win64;
1145
3.26k
  case CC_X86_64SysV:
1146
1
    return llvm::dwarf::DW_CC_LLVM_X86_64SysV;
1147
3.26k
  case CC_AAPCS:
1148
1
  case CC_AArch64VectorCall:
1149
1
    return llvm::dwarf::DW_CC_LLVM_AAPCS;
1150
1
  case CC_AAPCS_VFP:
1151
1
    return llvm::dwarf::DW_CC_LLVM_AAPCS_VFP;
1152
1
  case CC_IntelOclBicc:
1153
1
    return llvm::dwarf::DW_CC_LLVM_IntelOclBicc;
1154
3
  case CC_SpirFunction:
1155
3
    return llvm::dwarf::DW_CC_LLVM_SpirFunction;
1156
7
  case CC_OpenCLKernel:
1157
7
    return llvm::dwarf::DW_CC_LLVM_OpenCLKernel;
1158
1
  case CC_Swift:
1159
1
    return llvm::dwarf::DW_CC_LLVM_Swift;
1160
1
  case CC_PreserveMost:
1161
1
    return llvm::dwarf::DW_CC_LLVM_PreserveMost;
1162
1
  case CC_PreserveAll:
1163
1
    return llvm::dwarf::DW_CC_LLVM_PreserveAll;
1164
1
  case CC_X86RegCall:
1165
1
    return llvm::dwarf::DW_CC_LLVM_X86RegCall;
1166
0
  }
1167
0
  return 0;
1168
0
}
1169
1170
llvm::DIType *CGDebugInfo::CreateType(const FunctionType *Ty,
1171
1.24k
                                      llvm::DIFile *Unit) {
1172
1.24k
  SmallVector<llvm::Metadata *, 16> EltTys;
1173
1.24k
1174
1.24k
  // Add the result type at least.
1175
1.24k
  EltTys.push_back(getOrCreateType(Ty->getReturnType(), Unit));
1176
1.24k
1177
1.24k
  // Set up remainder of arguments if there is a prototype.
1178
1.24k
  // otherwise emit it as a variadic function.
1179
1.24k
  if (isa<FunctionNoProtoType>(Ty))
1180
3
    EltTys.push_back(DBuilder.createUnspecifiedParameter());
1181
1.24k
  else if (const auto *FPT = dyn_cast<FunctionProtoType>(Ty)) {
1182
1.24k
    for (const QualType &ParamType : FPT->param_types())
1183
1.32k
      EltTys.push_back(getOrCreateType(ParamType, Unit));
1184
1.24k
    if (FPT->isVariadic())
1185
5
      EltTys.push_back(DBuilder.createUnspecifiedParameter());
1186
1.24k
  }
1187
1.24k
1188
1.24k
  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys);
1189
1.24k
  return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
1190
1.24k
                                       getDwarfCC(Ty->getCallConv()));
1191
1.24k
}
1192
1193
/// Convert an AccessSpecifier into the corresponding DINode flag.
1194
/// As an optimization, return 0 if the access specifier equals the
1195
/// default for the containing type.
1196
static llvm::DINode::DIFlags getAccessFlag(AccessSpecifier Access,
1197
2.18k
                                           const RecordDecl *RD) {
1198
2.18k
  AccessSpecifier Default = clang::AS_none;
1199
2.18k
  if (RD && 
RD->isClass()2.00k
)
1200
763
    Default = clang::AS_private;
1201
1.42k
  else if (RD && 
(1.24k
RD->isStruct()1.24k
||
RD->isUnion()73
))
1202
1.24k
    Default = clang::AS_public;
1203
2.18k
1204
2.18k
  if (Access == Default)
1205
1.41k
    return llvm::DINode::FlagZero;
1206
771
1207
771
  switch (Access) {
1208
771
  case clang::AS_private:
1209
2
    return llvm::DINode::FlagPrivate;
1210
771
  case clang::AS_protected:
1211
33
    return llvm::DINode::FlagProtected;
1212
771
  case clang::AS_public:
1213
732
    return llvm::DINode::FlagPublic;
1214
771
  case clang::AS_none:
1215
4
    return llvm::DINode::FlagZero;
1216
0
  }
1217
0
  llvm_unreachable("unexpected access enumerator");
1218
0
}
1219
1220
llvm::DIType *CGDebugInfo::createBitFieldType(const FieldDecl *BitFieldDecl,
1221
                                              llvm::DIScope *RecordTy,
1222
26
                                              const RecordDecl *RD) {
1223
26
  StringRef Name = BitFieldDecl->getName();
1224
26
  QualType Ty = BitFieldDecl->getType();
1225
26
  SourceLocation Loc = BitFieldDecl->getLocation();
1226
26
  llvm::DIFile *VUnit = getOrCreateFile(Loc);
1227
26
  llvm::DIType *DebugType = getOrCreateType(Ty, VUnit);
1228
26
1229
26
  // Get the location for the field.
1230
26
  llvm::DIFile *File = getOrCreateFile(Loc);
1231
26
  unsigned Line = getLineNumber(Loc);
1232
26
1233
26
  const CGBitFieldInfo &BitFieldInfo =
1234
26
      CGM.getTypes().getCGRecordLayout(RD).getBitFieldInfo(BitFieldDecl);
1235
26
  uint64_t SizeInBits = BitFieldInfo.Size;
1236
26
  assert(SizeInBits > 0 && "found named 0-width bitfield");
1237
26
  uint64_t StorageOffsetInBits =
1238
26
      CGM.getContext().toBits(BitFieldInfo.StorageOffset);
1239
26
  uint64_t Offset = BitFieldInfo.Offset;
1240
26
  // The bit offsets for big endian machines are reversed for big
1241
26
  // endian target, compensate for that as the DIDerivedType requires
1242
26
  // un-reversed offsets.
1243
26
  if (CGM.getDataLayout().isBigEndian())
1244
6
    Offset = BitFieldInfo.StorageSize - BitFieldInfo.Size - Offset;
1245
26
  uint64_t OffsetInBits = StorageOffsetInBits + Offset;
1246
26
  llvm::DINode::DIFlags Flags = getAccessFlag(BitFieldDecl->getAccess(), RD);
1247
26
  return DBuilder.createBitFieldMemberType(
1248
26
      RecordTy, Name, File, Line, SizeInBits, OffsetInBits, StorageOffsetInBits,
1249
26
      Flags, DebugType);
1250
26
}
1251
1252
llvm::DIType *
1253
CGDebugInfo::createFieldType(StringRef name, QualType type, SourceLocation loc,
1254
                             AccessSpecifier AS, uint64_t offsetInBits,
1255
                             uint32_t AlignInBits, llvm::DIFile *tunit,
1256
784
                             llvm::DIScope *scope, const RecordDecl *RD) {
1257
784
  llvm::DIType *debugType = getOrCreateType(type, tunit);
1258
784
1259
784
  // Get the location for the field.
1260
784
  llvm::DIFile *file = getOrCreateFile(loc);
1261
784
  unsigned line = getLineNumber(loc);
1262
784
1263
784
  uint64_t SizeInBits = 0;
1264
784
  auto Align = AlignInBits;
1265
784
  if (!type->isIncompleteArrayType()) {
1266
781
    TypeInfo TI = CGM.getContext().getTypeInfo(type);
1267
781
    SizeInBits = TI.Width;
1268
781
    if (!Align)
1269
781
      Align = getTypeAlignIfRequired(type, CGM.getContext());
1270
781
  }
1271
784
1272
784
  llvm::DINode::DIFlags flags = getAccessFlag(AS, RD);
1273
784
  return DBuilder.createMemberType(scope, name, file, line, SizeInBits, Align,
1274
784
                                   offsetInBits, flags, debugType);
1275
784
}
1276
1277
void CGDebugInfo::CollectRecordLambdaFields(
1278
    const CXXRecordDecl *CXXDecl, SmallVectorImpl<llvm::Metadata *> &elements,
1279
25
    llvm::DIType *RecordTy) {
1280
25
  // For C++11 Lambdas a Field will be the same as a Capture, but the Capture
1281
25
  // has the name and the location of the variable so we should iterate over
1282
25
  // both concurrently.
1283
25
  const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(CXXDecl);
1284
25
  RecordDecl::field_iterator Field = CXXDecl->field_begin();
1285
25
  unsigned fieldno = 0;
1286
25
  for (CXXRecordDecl::capture_const_iterator I = CXXDecl->captures_begin(),
1287
25
                                             E = CXXDecl->captures_end();
1288
38
       I != E; 
++I, ++Field, ++fieldno13
) {
1289
13
    const LambdaCapture &C = *I;
1290
13
    if (C.capturesVariable()) {
1291
12
      SourceLocation Loc = C.getLocation();
1292
12
      assert(!Field->isBitField() && "lambdas don't have bitfield members!");
1293
12
      VarDecl *V = C.getCapturedVar();
1294
12
      StringRef VName = V->getName();
1295
12
      llvm::DIFile *VUnit = getOrCreateFile(Loc);
1296
12
      auto Align = getDeclAlignIfRequired(V, CGM.getContext());
1297
12
      llvm::DIType *FieldType = createFieldType(
1298
12
          VName, Field->getType(), Loc, Field->getAccess(),
1299
12
          layout.getFieldOffset(fieldno), Align, VUnit, RecordTy, CXXDecl);
1300
12
      elements.push_back(FieldType);
1301
12
    } else 
if (1
C.capturesThis()1
) {
1302
1
      // TODO: Need to handle 'this' in some way by probably renaming the
1303
1
      // this of the lambda class and having a field member of 'this' or
1304
1
      // by using AT_object_pointer for the function and having that be
1305
1
      // used as 'this' for semantic references.
1306
1
      FieldDecl *f = *Field;
1307
1
      llvm::DIFile *VUnit = getOrCreateFile(f->getLocation());
1308
1
      QualType type = f->getType();
1309
1
      llvm::DIType *fieldType = createFieldType(
1310
1
          "this", type, f->getLocation(), f->getAccess(),
1311
1
          layout.getFieldOffset(fieldno), VUnit, RecordTy, CXXDecl);
1312
1
1313
1
      elements.push_back(fieldType);
1314
1
    }
1315
13
  }
1316
25
}
1317
1318
llvm::DIDerivedType *
1319
CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy,
1320
116
                                     const RecordDecl *RD) {
1321
116
  // Create the descriptor for the static variable, with or without
1322
116
  // constant initializers.
1323
116
  Var = Var->getCanonicalDecl();
1324
116
  llvm::DIFile *VUnit = getOrCreateFile(Var->getLocation());
1325
116
  llvm::DIType *VTy = getOrCreateType(Var->getType(), VUnit);
1326
116
1327
116
  unsigned LineNumber = getLineNumber(Var->getLocation());
1328
116
  StringRef VName = Var->getName();
1329
116
  llvm::Constant *C = nullptr;
1330
116
  if (Var->getInit()) {
1331
37
    const APValue *Value = Var->evaluateValue();
1332
37
    if (Value) {
1333
37
      if (Value->isInt())
1334
33
        C = llvm::ConstantInt::get(CGM.getLLVMContext(), Value->getInt());
1335
37
      if (Value->isFloat())
1336
4
        C = llvm::ConstantFP::get(CGM.getLLVMContext(), Value->getFloat());
1337
37
    }
1338
37
  }
1339
116
1340
116
  llvm::DINode::DIFlags Flags = getAccessFlag(Var->getAccess(), RD);
1341
116
  auto Align = getDeclAlignIfRequired(Var, CGM.getContext());
1342
116
  llvm::DIDerivedType *GV = DBuilder.createStaticMemberType(
1343
116
      RecordTy, VName, VUnit, LineNumber, VTy, Flags, C, Align);
1344
116
  StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV);
1345
116
  return GV;
1346
116
}
1347
1348
void CGDebugInfo::CollectRecordNormalField(
1349
    const FieldDecl *field, uint64_t OffsetInBits, llvm::DIFile *tunit,
1350
    SmallVectorImpl<llvm::Metadata *> &elements, llvm::DIType *RecordTy,
1351
632
    const RecordDecl *RD) {
1352
632
  StringRef name = field->getName();
1353
632
  QualType type = field->getType();
1354
632
1355
632
  // Ignore unnamed fields unless they're anonymous structs/unions.
1356
632
  if (name.empty() && 
!type->isRecordType()24
)
1357
16
    return;
1358
616
1359
616
  llvm::DIType *FieldType;
1360
616
  if (field->isBitField()) {
1361
26
    FieldType = createBitFieldType(field, RecordTy, RD);
1362
590
  } else {
1363
590
    auto Align = getDeclAlignIfRequired(field, CGM.getContext());
1364
590
    FieldType =
1365
590
        createFieldType(name, type, field->getLocation(), field->getAccess(),
1366
590
                        OffsetInBits, Align, tunit, RecordTy, RD);
1367
590
  }
1368
616
1369
616
  elements.push_back(FieldType);
1370
616
}
1371
1372
void CGDebugInfo::CollectRecordNestedType(
1373
12
    const TypeDecl *TD, SmallVectorImpl<llvm::Metadata *> &elements) {
1374
12
  QualType Ty = CGM.getContext().getTypeDeclType(TD);
1375
12
  // Injected class names are not considered nested records.
1376
12
  if (isa<InjectedClassNameType>(Ty))
1377
1
    return;
1378
11
  SourceLocation Loc = TD->getLocation();
1379
11
  llvm::DIType *nestedType = getOrCreateType(Ty, getOrCreateFile(Loc));
1380
11
  elements.push_back(nestedType);
1381
11
}
1382
1383
void CGDebugInfo::CollectRecordFields(
1384
    const RecordDecl *record, llvm::DIFile *tunit,
1385
    SmallVectorImpl<llvm::Metadata *> &elements,
1386
984
    llvm::DICompositeType *RecordTy) {
1387
984
  const auto *CXXDecl = dyn_cast<CXXRecordDecl>(record);
1388
984
1389
984
  if (CXXDecl && 
CXXDecl->isLambda()842
)
1390
25
    CollectRecordLambdaFields(CXXDecl, elements, RecordTy);
1391
959
  else {
1392
959
    const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(record);
1393
959
1394
959
    // Field number for non-static fields.
1395
959
    unsigned fieldNo = 0;
1396
959
1397
959
    // Static and non-static members should appear in the same order as
1398
959
    // the corresponding declarations in the source program.
1399
959
    for (const auto *I : record->decls())
1400
4.49k
      if (const auto *V = dyn_cast<VarDecl>(I)) {
1401
90
        if (V->hasAttr<NoDebugAttr>())
1402
2
          continue;
1403
88
1404
88
        // Skip variable template specializations when emitting CodeView. MSVC
1405
88
        // doesn't emit them.
1406
88
        if (CGM.getCodeGenOpts().EmitCodeView &&
1407
88
            
isa<VarTemplateSpecializationDecl>(V)15
)
1408
5
          continue;
1409
83
1410
83
        if (isa<VarTemplatePartialSpecializationDecl>(V))
1411
1
          continue;
1412
82
1413
82
        // Reuse the existing static member declaration if one exists
1414
82
        auto MI = StaticDataMemberCache.find(V->getCanonicalDecl());
1415
82
        if (MI != StaticDataMemberCache.end()) {
1416
0
          assert(MI->second &&
1417
0
                 "Static data member declaration should still exist");
1418
0
          elements.push_back(MI->second);
1419
82
        } else {
1420
82
          auto Field = CreateRecordStaticField(V, RecordTy, record);
1421
82
          elements.push_back(Field);
1422
82
        }
1423
4.40k
      } else if (const auto *field = dyn_cast<FieldDecl>(I)) {
1424
632
        CollectRecordNormalField(field, layout.getFieldOffset(fieldNo), tunit,
1425
632
                                 elements, RecordTy, record);
1426
632
1427
632
        // Bump field number for next field.
1428
632
        ++fieldNo;
1429
3.77k
      } else if (CGM.getCodeGenOpts().EmitCodeView) {
1430
328
        // Debug info for nested types is included in the member list only for
1431
328
        // CodeView.
1432
328
        if (const auto *nestedType = dyn_cast<TypeDecl>(I))
1433
82
          if (!nestedType->isImplicit() &&
1434
82
              
nestedType->getDeclContext() == record12
)
1435
12
            CollectRecordNestedType(nestedType, elements);
1436
328
      }
1437
959
  }
1438
984
}
1439
1440
llvm::DISubroutineType *
1441
CGDebugInfo::getOrCreateMethodType(const CXXMethodDecl *Method,
1442
1.91k
                                   llvm::DIFile *Unit) {
1443
1.91k
  const FunctionProtoType *Func = Method->getType()->getAs<FunctionProtoType>();
1444
1.91k
  if (Method->isStatic())
1445
61
    return cast_or_null<llvm::DISubroutineType>(
1446
61
        getOrCreateType(QualType(Func, 0), Unit));
1447
1.85k
  return getOrCreateInstanceMethodType(Method->getThisType(), Func, Unit);
1448
1.85k
}
1449
1450
llvm::DISubroutineType *CGDebugInfo::getOrCreateInstanceMethodType(
1451
1.87k
    QualType ThisPtr, const FunctionProtoType *Func, llvm::DIFile *Unit) {
1452
1.87k
  // Add "this" pointer.
1453
1.87k
  llvm::DITypeRefArray Args(
1454
1.87k
      cast<llvm::DISubroutineType>(getOrCreateType(QualType(Func, 0), Unit))
1455
1.87k
          ->getTypeArray());
1456
1.87k
  assert(Args.size() && "Invalid number of arguments!");
1457
1.87k
1458
1.87k
  SmallVector<llvm::Metadata *, 16> Elts;
1459
1.87k
1460
1.87k
  // First element is always return type. For 'void' functions it is NULL.
1461
1.87k
  Elts.push_back(Args[0]);
1462
1.87k
1463
1.87k
  // "this" pointer is always first argument.
1464
1.87k
  const CXXRecordDecl *RD = ThisPtr->getPointeeCXXRecordDecl();
1465
1.87k
  if (isa<ClassTemplateSpecializationDecl>(RD)) {
1466
428
    // Create pointer type directly in this case.
1467
428
    const PointerType *ThisPtrTy = cast<PointerType>(ThisPtr);
1468
428
    QualType PointeeTy = ThisPtrTy->getPointeeType();
1469
428
    unsigned AS = CGM.getContext().getTargetAddressSpace(PointeeTy);
1470
428
    uint64_t Size = CGM.getTarget().getPointerWidth(AS);
1471
428
    auto Align = getTypeAlignIfRequired(ThisPtrTy, CGM.getContext());
1472
428
    llvm::DIType *PointeeType = getOrCreateType(PointeeTy, Unit);
1473
428
    llvm::DIType *ThisPtrType =
1474
428
        DBuilder.createPointerType(PointeeType, Size, Align);
1475
428
    TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
1476
428
    // TODO: This and the artificial type below are misleading, the
1477
428
    // types aren't artificial the argument is, but the current
1478
428
    // metadata doesn't represent that.
1479
428
    ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType);
1480
428
    Elts.push_back(ThisPtrType);
1481
1.45k
  } else {
1482
1.45k
    llvm::DIType *ThisPtrType = getOrCreateType(ThisPtr, Unit);
1483
1.45k
    TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType);
1484
1.45k
    ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType);
1485
1.45k
    Elts.push_back(ThisPtrType);
1486
1.45k
  }
1487
1.87k
1488
1.87k
  // Copy rest of the arguments.
1489
2.28k
  for (unsigned i = 1, e = Args.size(); i != e; 
++i407
)
1490
407
    Elts.push_back(Args[i]);
1491
1.87k
1492
1.87k
  llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts);
1493
1.87k
1494
1.87k
  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
1495
1.87k
  if (Func->getExtProtoInfo().RefQualifier == RQ_LValue)
1496
4
    Flags |= llvm::DINode::FlagLValueReference;
1497
1.87k
  if (Func->getExtProtoInfo().RefQualifier == RQ_RValue)
1498
4
    Flags |= llvm::DINode::FlagRValueReference;
1499
1.87k
1500
1.87k
  return DBuilder.createSubroutineType(EltTypeArray, Flags,
1501
1.87k
                                       getDwarfCC(Func->getCallConv()));
1502
1.87k
}
1503
1504
/// isFunctionLocalClass - Return true if CXXRecordDecl is defined
1505
/// inside a function.
1506
750
static bool isFunctionLocalClass(const CXXRecordDecl *RD) {
1507
750
  if (const auto *NRD = dyn_cast<CXXRecordDecl>(RD->getDeclContext()))
1508
12
    return isFunctionLocalClass(NRD);
1509
738
  if (isa<FunctionDecl>(RD->getDeclContext()))
1510
17
    return true;
1511
721
  return false;
1512
721
}
1513
1514
llvm::DISubprogram *CGDebugInfo::CreateCXXMemberFunction(
1515
1.12k
    const CXXMethodDecl *Method, llvm::DIFile *Unit, llvm::DIType *RecordTy) {
1516
1.12k
  bool IsCtorOrDtor =
1517
1.12k
      isa<CXXConstructorDecl>(Method) || 
isa<CXXDestructorDecl>(Method)824
;
1518
1.12k
1519
1.12k
  StringRef MethodName = getFunctionName(Method);
1520
1.12k
  llvm::DISubroutineType *MethodTy = getOrCreateMethodType(Method, Unit);
1521
1.12k
1522
1.12k
  // Since a single ctor/dtor corresponds to multiple functions, it doesn't
1523
1.12k
  // make sense to give a single ctor/dtor a linkage name.
1524
1.12k
  StringRef MethodLinkageName;
1525
1.12k
  // FIXME: 'isFunctionLocalClass' seems like an arbitrary/unintentional
1526
1.12k
  // property to use here. It may've been intended to model "is non-external
1527
1.12k
  // type" but misses cases of non-function-local but non-external classes such
1528
1.12k
  // as those in anonymous namespaces as well as the reverse - external types
1529
1.12k
  // that are function local, such as those in (non-local) inline functions.
1530
1.12k
  if (!IsCtorOrDtor && 
!isFunctionLocalClass(Method->getParent())738
)
1531
721
    MethodLinkageName = CGM.getMangledName(Method);
1532
1.12k
1533
1.12k
  // Get the location for the method.
1534
1.12k
  llvm::DIFile *MethodDefUnit = nullptr;
1535
1.12k
  unsigned MethodLine = 0;
1536
1.12k
  if (!Method->isImplicit()) {
1537
1.01k
    MethodDefUnit = getOrCreateFile(Method->getLocation());
1538
1.01k
    MethodLine = getLineNumber(Method->getLocation());
1539
1.01k
  }
1540
1.12k
1541
1.12k
  // Collect virtual method info.
1542
1.12k
  llvm::DIType *ContainingType = nullptr;
1543
1.12k
  unsigned VIndex = 0;
1544
1.12k
  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
1545
1.12k
  llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
1546
1.12k
  int ThisAdjustment = 0;
1547
1.12k
1548
1.12k
  if (Method->isVirtual()) {
1549
402
    if (Method->isPure())
1550
8
      SPFlags |= llvm::DISubprogram::SPFlagPureVirtual;
1551
394
    else
1552
394
      SPFlags |= llvm::DISubprogram::SPFlagVirtual;
1553
402
1554
402
    if (CGM.getTarget().getCXXABI().isItaniumFamily()) {
1555
369
      // It doesn't make sense to give a virtual destructor a vtable index,
1556
369
      // since a single destructor has two entries in the vtable.
1557
369
      if (!isa<CXXDestructorDecl>(Method))
1558
341
        VIndex = CGM.getItaniumVTableContext().getMethodVTableIndex(Method);
1559
369
    } else {
1560
33
      // Emit MS ABI vftable information.  There is only one entry for the
1561
33
      // deleting dtor.
1562
33
      const auto *DD = dyn_cast<CXXDestructorDecl>(Method);
1563
33
      GlobalDecl GD = DD ? 
GlobalDecl(DD, Dtor_Deleting)2
:
GlobalDecl(Method)31
;
1564
33
      MethodVFTableLocation ML =
1565
33
          CGM.getMicrosoftVTableContext().getMethodVFTableLocation(GD);
1566
33
      VIndex = ML.Index;
1567
33
1568
33
      // CodeView only records the vftable offset in the class that introduces
1569
33
      // the virtual method. This is possible because, unlike Itanium, the MS
1570
33
      // C++ ABI does not include all virtual methods from non-primary bases in
1571
33
      // the vtable for the most derived class. For example, if C inherits from
1572
33
      // A and B, C's primary vftable will not include B's virtual methods.
1573
33
      if (Method->size_overridden_methods() == 0)
1574
20
        Flags |= llvm::DINode::FlagIntroducedVirtual;
1575
33
1576
33
      // The 'this' adjustment accounts for both the virtual and non-virtual
1577
33
      // portions of the adjustment. Presumably the debugger only uses it when
1578
33
      // it knows the dynamic type of an object.
1579
33
      ThisAdjustment = CGM.getCXXABI()
1580
33
                           .getVirtualFunctionPrologueThisAdjustment(GD)
1581
33
                           .getQuantity();
1582
33
    }
1583
402
    ContainingType = RecordTy;
1584
402
  }
1585
1.12k
1586
1.12k
  if (Method->isStatic())
1587
36
    Flags |= llvm::DINode::FlagStaticMember;
1588
1.12k
  if (Method->isImplicit())
1589
112
    Flags |= llvm::DINode::FlagArtificial;
1590
1.12k
  Flags |= getAccessFlag(Method->getAccess(), Method->getParent());
1591
1.12k
  if (const auto *CXXC = dyn_cast<CXXConstructorDecl>(Method)) {
1592
300
    if (CXXC->isExplicit())
1593
3
      Flags |= llvm::DINode::FlagExplicit;
1594
824
  } else if (const auto *CXXC = dyn_cast<CXXConversionDecl>(Method)) {
1595
6
    if (CXXC->isExplicit())
1596
0
      Flags |= llvm::DINode::FlagExplicit;
1597
6
  }
1598
1.12k
  if (Method->hasPrototype())
1599
1.12k
    Flags |= llvm::DINode::FlagPrototyped;
1600
1.12k
  if (Method->getRefQualifier() == RQ_LValue)
1601
2
    Flags |= llvm::DINode::FlagLValueReference;
1602
1.12k
  if (Method->getRefQualifier() == RQ_RValue)
1603
2
    Flags |= llvm::DINode::FlagRValueReference;
1604
1.12k
  if (CGM.getLangOpts().Optimize)
1605
8
    SPFlags |= llvm::DISubprogram::SPFlagOptimized;
1606
1.12k
1607
1.12k
  llvm::DINodeArray TParamsArray = CollectFunctionTemplateParams(Method, Unit);
1608
1.12k
  llvm::DISubprogram *SP = DBuilder.createMethod(
1609
1.12k
      RecordTy, MethodName, MethodLinkageName, MethodDefUnit, MethodLine,
1610
1.12k
      MethodTy, VIndex, ThisAdjustment, ContainingType, Flags, SPFlags,
1611
1.12k
      TParamsArray.get());
1612
1.12k
1613
1.12k
  SPCache[Method->getCanonicalDecl()].reset(SP);
1614
1.12k
1615
1.12k
  return SP;
1616
1.12k
}
1617
1618
void CGDebugInfo::CollectCXXMemberFunctions(
1619
    const CXXRecordDecl *RD, llvm::DIFile *Unit,
1620
842
    SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy) {
1621
842
1622
842
  // Since we want more than just the individual member decls if we
1623
842
  // have templated functions iterate over every declaration to gather
1624
842
  // the functions.
1625
4.30k
  for (const auto *I : RD->decls()) {
1626
4.30k
    const auto *Method = dyn_cast<CXXMethodDecl>(I);
1627
4.30k
    // If the member is implicit, don't add it to the member list. This avoids
1628
4.30k
    // the member being added to type units by LLVM, while still allowing it
1629
4.30k
    // to be emitted into the type declaration/reference inside the compile
1630
4.30k
    // unit.
1631
4.30k
    // Ditto 'nodebug' methods, for consistency with CodeGenFunction.cpp.
1632
4.30k
    // FIXME: Handle Using(Shadow?)Decls here to create
1633
4.30k
    // DW_TAG_imported_declarations inside the class for base decls brought into
1634
4.30k
    // derived classes. GDB doesn't seem to notice/leverage these when I tried
1635
4.30k
    // it, so I'm not rushing to fix this. (GCC seems to produce them, if
1636
4.30k
    // referenced)
1637
4.30k
    if (!Method || 
Method->isImplicit()2.66k
||
Method->hasAttr<NoDebugAttr>()854
)
1638
3.45k
      continue;
1639
853
1640
853
    if (Method->getType()->getAs<FunctionProtoType>()->getContainedAutoType())
1641
2
      continue;
1642
851
1643
851
    // Reuse the existing member function declaration if it exists.
1644
851
    // It may be associated with the declaration of the type & should be
1645
851
    // reused as we're building the definition.
1646
851
    //
1647
851
    // This situation can arise in the vtable-based debug info reduction where
1648
851
    // implicit members are emitted in a non-vtable TU.
1649
851
    auto MI = SPCache.find(Method->getCanonicalDecl());
1650
851
    EltTys.push_back(MI == SPCache.end()
1651
851
                         ? 
CreateCXXMemberFunction(Method, Unit, RecordTy)824
1652
851
                         : 
static_cast<llvm::Metadata *>(MI->second)27
);
1653
851
  }
1654
842
}
1655
1656
void CGDebugInfo::CollectCXXBases(const CXXRecordDecl *RD, llvm::DIFile *Unit,
1657
                                  SmallVectorImpl<llvm::Metadata *> &EltTys,
1658
842
                                  llvm::DIType *RecordTy) {
1659
842
  llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> SeenTypes;
1660
842
  CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->bases(), SeenTypes,
1661
842
                     llvm::DINode::FlagZero);
1662
842
1663
842
  // If we are generating CodeView debug info, we also need to emit records for
1664
842
  // indirect virtual base classes.
1665
842
  if (CGM.getCodeGenOpts().EmitCodeView) {
1666
82
    CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->vbases(), SeenTypes,
1667
82
                       llvm::DINode::FlagIndirectVirtualBase);
1668
82
  }
1669
842
}
1670
1671
void CGDebugInfo::CollectCXXBasesAux(
1672
    const CXXRecordDecl *RD, llvm::DIFile *Unit,
1673
    SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy,
1674
    const CXXRecordDecl::base_class_const_range &Bases,
1675
    llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> &SeenTypes,
1676
924
    llvm::DINode::DIFlags StartingFlags) {
1677
924
  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
1678
924
  for (const auto &BI : Bases) {
1679
140
    const auto *Base =
1680
140
        cast<CXXRecordDecl>(BI.getType()->getAs<RecordType>()->getDecl());
1681
140
    if (!SeenTypes.insert(Base).second)
1682
3
      continue;
1683
137
    auto *BaseTy = getOrCreateType(BI.getType(), Unit);
1684
137
    llvm::DINode::DIFlags BFlags = StartingFlags;
1685
137
    uint64_t BaseOffset;
1686
137
    uint32_t VBPtrOffset = 0;
1687
137
1688
137
    if (BI.isVirtual()) {
1689
17
      if (CGM.getTarget().getCXXABI().isItaniumFamily()) {
1690
12
        // virtual base offset offset is -ve. The code generator emits dwarf
1691
12
        // expression where it expects +ve number.
1692
12
        BaseOffset = 0 - CGM.getItaniumVTableContext()
1693
12
                             .getVirtualBaseOffsetOffset(RD, Base)
1694
12
                             .getQuantity();
1695
12
      } else {
1696
5
        // In the MS ABI, store the vbtable offset, which is analogous to the
1697
5
        // vbase offset offset in Itanium.
1698
5
        BaseOffset =
1699
5
            4 * CGM.getMicrosoftVTableContext().getVBTableIndex(RD, Base);
1700
5
        VBPtrOffset = CGM.getContext()
1701
5
                          .getASTRecordLayout(RD)
1702
5
                          .getVBPtrOffset()
1703
5
                          .getQuantity();
1704
5
      }
1705
17
      BFlags |= llvm::DINode::FlagVirtual;
1706
17
    } else
1707
120
      BaseOffset = CGM.getContext().toBits(RL.getBaseClassOffset(Base));
1708
137
    // FIXME: Inconsistent units for BaseOffset. It is in bytes when
1709
137
    // BI->isVirtual() and bits when not.
1710
137
1711
137
    BFlags |= getAccessFlag(BI.getAccessSpecifier(), RD);
1712
137
    llvm::DIType *DTy = DBuilder.createInheritance(RecordTy, BaseTy, BaseOffset,
1713
137
                                                   VBPtrOffset, BFlags);
1714
137
    EltTys.push_back(DTy);
1715
137
  }
1716
924
}
1717
1718
llvm::DINodeArray
1719
CGDebugInfo::CollectTemplateParams(const TemplateParameterList *TPList,
1720
                                   ArrayRef<TemplateArgument> TAList,
1721
662
                                   llvm::DIFile *Unit) {
1722
662
  SmallVector<llvm::Metadata *, 16> TemplateParams;
1723
1.46k
  for (unsigned i = 0, e = TAList.size(); i != e; 
++i800
) {
1724
800
    const TemplateArgument &TA = TAList[i];
1725
800
    StringRef Name;
1726
800
    if (TPList)
1727
790
      Name = TPList->getParam(i)->getName();
1728
800
    switch (TA.getKind()) {
1729
800
    case TemplateArgument::Type: {
1730
376
      llvm::DIType *TTy = getOrCreateType(TA.getAsType(), Unit);
1731
376
      TemplateParams.push_back(
1732
376
          DBuilder.createTemplateTypeParameter(TheCU, Name, TTy));
1733
376
    } break;
1734
800
    case TemplateArgument::Integral: {
1735
362
      llvm::DIType *TTy = getOrCreateType(TA.getIntegralType(), Unit);
1736
362
      TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1737
362
          TheCU, Name, TTy,
1738
362
          llvm::ConstantInt::get(CGM.getLLVMContext(), TA.getAsIntegral())));
1739
362
    } break;
1740
800
    case TemplateArgument::Declaration: {
1741
12
      const ValueDecl *D = TA.getAsDecl();
1742
12
      QualType T = TA.getParamTypeForDecl().getDesugaredType(CGM.getContext());
1743
12
      llvm::DIType *TTy = getOrCreateType(T, Unit);
1744
12
      llvm::Constant *V = nullptr;
1745
12
      // Skip retrieve the value if that template parameter has cuda device
1746
12
      // attribute, i.e. that value is not available at the host side.
1747
12
      if (!CGM.getLangOpts().CUDA || 
CGM.getLangOpts().CUDAIsDevice1
||
1748
12
          
!D->hasAttr<CUDADeviceAttr>()1
) {
1749
11
        const CXXMethodDecl *MD;
1750
11
        // Variable pointer template parameters have a value that is the address
1751
11
        // of the variable.
1752
11
        if (const auto *VD = dyn_cast<VarDecl>(D))
1753
5
          V = CGM.GetAddrOfGlobalVar(VD);
1754
6
        // Member function pointers have special support for building them,
1755
6
        // though this is currently unsupported in LLVM CodeGen.
1756
6
        else if ((MD = dyn_cast<CXXMethodDecl>(D)) && 
MD->isInstance()2
)
1757
1
          V = CGM.getCXXABI().EmitMemberFunctionPointer(MD);
1758
5
        else if (const auto *FD = dyn_cast<FunctionDecl>(D))
1759
3
          V = CGM.GetAddrOfFunction(FD);
1760
2
        // Member data pointers have special handling too to compute the fixed
1761
2
        // offset within the object.
1762
2
        else if (const auto *MPT =
1763
2
                     dyn_cast<MemberPointerType>(T.getTypePtr())) {
1764
2
          // These five lines (& possibly the above member function pointer
1765
2
          // handling) might be able to be refactored to use similar code in
1766
2
          // CodeGenModule::getMemberPointerConstant
1767
2
          uint64_t fieldOffset = CGM.getContext().getFieldOffset(D);
1768
2
          CharUnits chars =
1769
2
              CGM.getContext().toCharUnitsFromBits((int64_t)fieldOffset);
1770
2
          V = CGM.getCXXABI().EmitMemberDataPointer(MPT, chars);
1771
2
        }
1772
11
        V = V->stripPointerCasts();
1773
11
      }
1774
12
      TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1775
12
          TheCU, Name, TTy, cast_or_null<llvm::Constant>(V)));
1776
12
    } break;
1777
800
    case TemplateArgument::NullPtr: {
1778
4
      QualType T = TA.getNullPtrType();
1779
4
      llvm::DIType *TTy = getOrCreateType(T, Unit);
1780
4
      llvm::Constant *V = nullptr;
1781
4
      // Special case member data pointer null values since they're actually -1
1782
4
      // instead of zero.
1783
4
      if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr()))
1784
2
        // But treat member function pointers as simple zero integers because
1785
2
        // it's easier than having a special case in LLVM's CodeGen. If LLVM
1786
2
        // CodeGen grows handling for values of non-null member function
1787
2
        // pointers then perhaps we could remove this special case and rely on
1788
2
        // EmitNullMemberPointer for member function pointers.
1789
2
        if (MPT->isMemberDataPointer())
1790
1
          V = CGM.getCXXABI().EmitNullMemberPointer(MPT);
1791
4
      if (!V)
1792
3
        V = llvm::ConstantInt::get(CGM.Int8Ty, 0);
1793
4
      TemplateParams.push_back(
1794
4
          DBuilder.createTemplateValueParameter(TheCU, Name, TTy, V));
1795
4
    } break;
1796
800
    case TemplateArgument::Template:
1797
32
      TemplateParams.push_back(DBuilder.createTemplateTemplateParameter(
1798
32
          TheCU, Name, nullptr,
1799
32
          TA.getAsTemplate().getAsTemplateDecl()->getQualifiedNameAsString()));
1800
32
      break;
1801
800
    case TemplateArgument::Pack:
1802
10
      TemplateParams.push_back(DBuilder.createTemplateParameterPack(
1803
10
          TheCU, Name, nullptr,
1804
10
          CollectTemplateParams(nullptr, TA.getPackAsArray(), Unit)));
1805
10
      break;
1806
800
    case TemplateArgument::Expression: {
1807
4
      const Expr *E = TA.getAsExpr();
1808
4
      QualType T = E->getType();
1809
4
      if (E->isGLValue())
1810
2
        T = CGM.getContext().getLValueReferenceType(T);
1811
4
      llvm::Constant *V = ConstantEmitter(CGM).emitAbstract(E, T);
1812
4
      assert(V && "Expression in template argument isn't constant");
1813
4
      llvm::DIType *TTy = getOrCreateType(T, Unit);
1814
4
      TemplateParams.push_back(DBuilder.createTemplateValueParameter(
1815
4
          TheCU, Name, TTy, V->stripPointerCasts()));
1816
4
    } break;
1817
800
    // And the following should never occur:
1818
800
    case TemplateArgument::TemplateExpansion:
1819
0
    case TemplateArgument::Null:
1820
0
      llvm_unreachable(
1821
800
          "These argument types shouldn't exist in concrete types");
1822
800
    }
1823
800
  }
1824
662
  return DBuilder.getOrCreateArray(TemplateParams);
1825
662
}
1826
1827
llvm::DINodeArray
1828
CGDebugInfo::CollectFunctionTemplateParams(const FunctionDecl *FD,
1829
2.75k
                                           llvm::DIFile *Unit) {
1830
2.75k
  if (FD->getTemplatedKind() ==
1831
2.75k
      FunctionDecl::TK_FunctionTemplateSpecialization) {
1832
328
    const TemplateParameterList *TList = FD->getTemplateSpecializationInfo()
1833
328
                                             ->getTemplate()
1834
328
                                             ->getTemplateParameters();
1835
328
    return CollectTemplateParams(
1836
328
        TList, FD->getTemplateSpecializationArgs()->asArray(), Unit);
1837
328
  }
1838
2.43k
  return llvm::DINodeArray();
1839
2.43k
}
1840
1841
llvm::DINodeArray CGDebugInfo::CollectVarTemplateParams(const VarDecl *VL,
1842
9
                                                        llvm::DIFile *Unit) {
1843
9
  // Always get the full list of parameters, not just the ones from the
1844
9
  // specialization. A partial specialization may have fewer parameters than
1845
9
  // there are arguments.
1846
9
  auto *TS = dyn_cast<VarTemplateSpecializationDecl>(VL);
1847
9
  if (!TS)
1848
0
    return llvm::DINodeArray();
1849
9
  VarTemplateDecl *T = TS->getSpecializedTemplate();
1850
9
  const TemplateParameterList *TList = T->getTemplateParameters();
1851
9
  auto TA = TS->getTemplateArgs().asArray();
1852
9
  return CollectTemplateParams(TList, TA, Unit);
1853
9
}
1854
1855
llvm::DINodeArray CGDebugInfo::CollectCXXTemplateParams(
1856
315
    const ClassTemplateSpecializationDecl *TSpecial, llvm::DIFile *Unit) {
1857
315
  // Always get the full list of parameters, not just the ones from the
1858
315
  // specialization. A partial specialization may have fewer parameters than
1859
315
  // there are arguments.
1860
315
  TemplateParameterList *TPList =
1861
315
      TSpecial->getSpecializedTemplate()->getTemplateParameters();
1862
315
  const TemplateArgumentList &TAList = TSpecial->getTemplateArgs();
1863
315
  return CollectTemplateParams(TPList, TAList.asArray(), Unit);
1864
315
}
1865
1866
56
llvm::DIType *CGDebugInfo::getOrCreateVTablePtrType(llvm::DIFile *Unit) {
1867
56
  if (VTablePtrType)
1868
27
    return VTablePtrType;
1869
29
1870
29
  ASTContext &Context = CGM.getContext();
1871
29
1872
29
  /* Function type */
1873
29
  llvm::Metadata *STy = getOrCreateType(Context.IntTy, Unit);
1874
29
  llvm::DITypeRefArray SElements = DBuilder.getOrCreateTypeArray(STy);
1875
29
  llvm::DIType *SubTy = DBuilder.createSubroutineType(SElements);
1876
29
  unsigned Size = Context.getTypeSize(Context.VoidPtrTy);
1877
29
  unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace();
1878
29
  Optional<unsigned> DWARFAddressSpace =
1879
29
      CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace);
1880
29
1881
29
  llvm::DIType *vtbl_ptr_type = DBuilder.createPointerType(
1882
29
      SubTy, Size, 0, DWARFAddressSpace, "__vtbl_ptr_type");
1883
29
  VTablePtrType = DBuilder.createPointerType(vtbl_ptr_type, Size);
1884
29
  return VTablePtrType;
1885
29
}
1886
1887
63
StringRef CGDebugInfo::getVTableName(const CXXRecordDecl *RD) {
1888
63
  // Copy the gdb compatible name on the side and use its reference.
1889
63
  return internString("_vptr$", RD->getNameAsString());
1890
63
}
1891
1892
StringRef CGDebugInfo::getDynamicInitializerName(const VarDecl *VD,
1893
                                                 DynamicInitKind StubKind,
1894
235
                                                 llvm::Function *InitFn) {
1895
235
  // If we're not emitting codeview, use the mangled name. For Itanium, this is
1896
235
  // arbitrary.
1897
235
  if (!CGM.getCodeGenOpts().EmitCodeView)
1898
220
    return InitFn->getName();
1899
15
1900
15
  // Print the normal qualified name for the variable, then break off the last
1901
15
  // NNS, and add the appropriate other text. Clang always prints the global
1902
15
  // variable name without template arguments, so we can use rsplit("::") and
1903
15
  // then recombine the pieces.
1904
15
  SmallString<128> QualifiedGV;
1905
15
  StringRef Quals;
1906
15
  StringRef GVName;
1907
15
  {
1908
15
    llvm::raw_svector_ostream OS(QualifiedGV);
1909
15
    VD->printQualifiedName(OS, getPrintingPolicy());
1910
15
    std::tie(Quals, GVName) = OS.str().rsplit("::");
1911
15
    if (GVName.empty())
1912
10
      std::swap(Quals, GVName);
1913
15
  }
1914
15
1915
15
  SmallString<128> InitName;
1916
15
  llvm::raw_svector_ostream OS(InitName);
1917
15
  if (!Quals.empty())
1918
5
    OS << Quals << "::";
1919
15
1920
15
  switch (StubKind) {
1921
15
  case DynamicInitKind::NoStub:
1922
0
    llvm_unreachable("not an initializer");
1923
15
  case DynamicInitKind::Initializer:
1924
11
    OS << "`dynamic initializer for '";
1925
11
    break;
1926
15
  case DynamicInitKind::AtExit:
1927
4
    OS << "`dynamic atexit destructor for '";
1928
4
    break;
1929
15
  }
1930
15
1931
15
  OS << GVName;
1932
15
1933
15
  // Add any template specialization args.
1934
15
  if (const auto *VTpl = dyn_cast<VarTemplateSpecializationDecl>(VD)) {
1935
2
    printTemplateArgumentList(OS, VTpl->getTemplateArgs().asArray(),
1936
2
                              getPrintingPolicy());
1937
2
  }
1938
15
1939
15
  OS << '\'';
1940
15
1941
15
  return internString(OS.str());
1942
15
}
1943
1944
void CGDebugInfo::CollectVTableInfo(const CXXRecordDecl *RD, llvm::DIFile *Unit,
1945
                                    SmallVectorImpl<llvm::Metadata *> &EltTys,
1946
842
                                    llvm::DICompositeType *RecordTy) {
1947
842
  // If this class is not dynamic then there is not any vtable info to collect.
1948
842
  if (!RD->isDynamicClass())
1949
743
    return;
1950
99
1951
99
  // Don't emit any vtable shape or vptr info if this class doesn't have an
1952
99
  // extendable vfptr. This can happen if the class doesn't have virtual
1953
99
  // methods, or in the MS ABI if those virtual methods only come from virtually
1954
99
  // inherited bases.
1955
99
  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
1956
99
  if (!RL.hasExtendableVFPtr())
1957
3
    return;
1958
96
1959
96
  // CodeView needs to know how large the vtable of every dynamic class is, so
1960
96
  // emit a special named pointer type into the element list. The vptr type
1961
96
  // points to this type as well.
1962
96
  llvm::DIType *VPtrTy = nullptr;
1963
96
  bool NeedVTableShape = CGM.getCodeGenOpts().EmitCodeView &&
1964
96
                         
CGM.getTarget().getCXXABI().isMicrosoft()10
;
1965
96
  if (NeedVTableShape) {
1966
10
    uint64_t PtrWidth =
1967
10
        CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
1968
10
    const VTableLayout &VFTLayout =
1969
10
        CGM.getMicrosoftVTableContext().getVFTableLayout(RD, CharUnits::Zero());
1970
10
    unsigned VSlotCount =
1971
10
        VFTLayout.vtable_components().size() - CGM.getLangOpts().RTTIData;
1972
10
    unsigned VTableWidth = PtrWidth * VSlotCount;
1973
10
    unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace();
1974
10
    Optional<unsigned> DWARFAddressSpace =
1975
10
        CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace);
1976
10
1977
10
    // Create a very wide void* type and insert it directly in the element list.
1978
10
    llvm::DIType *VTableType = DBuilder.createPointerType(
1979
10
        nullptr, VTableWidth, 0, DWARFAddressSpace, "__vtbl_ptr_type");
1980
10
    EltTys.push_back(VTableType);
1981
10
1982
10
    // The vptr is a pointer to this special vtable type.
1983
10
    VPtrTy = DBuilder.createPointerType(VTableType, PtrWidth);
1984
10
  }
1985
96
1986
96
  // If there is a primary base then the artificial vptr member lives there.
1987
96
  if (RL.getPrimaryBase())
1988
33
    return;
1989
63
1990
63
  if (!VPtrTy)
1991
56
    VPtrTy = getOrCreateVTablePtrType(Unit);
1992
63
1993
63
  unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
1994
63
  llvm::DIType *VPtrMember =
1995
63
      DBuilder.createMemberType(Unit, getVTableName(RD), Unit, 0, Size, 0, 0,
1996
63
                                llvm::DINode::FlagArtificial, VPtrTy);
1997
63
  EltTys.push_back(VPtrMember);
1998
63
}
1999
2000
llvm::DIType *CGDebugInfo::getOrCreateRecordType(QualType RTy,
2001
18
                                                 SourceLocation Loc) {
2002
18
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
2003
18
  llvm::DIType *T = getOrCreateType(RTy, getOrCreateFile(Loc));
2004
18
  return T;
2005
18
}
2006
2007
llvm::DIType *CGDebugInfo::getOrCreateInterfaceType(QualType D,
2008
59
                                                    SourceLocation Loc) {
2009
59
  return getOrCreateStandaloneType(D, Loc);
2010
59
}
2011
2012
llvm::DIType *CGDebugInfo::getOrCreateStandaloneType(QualType D,
2013
239
                                                     SourceLocation Loc) {
2014
239
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
2015
239
  assert(!D.isNull() && "null type");
2016
239
  llvm::DIType *T = getOrCreateType(D, getOrCreateFile(Loc));
2017
239
  assert(T && "could not create debug info for type");
2018
239
2019
239
  RetainedTypes.push_back(D.getAsOpaquePtr());
2020
239
  return T;
2021
239
}
2022
2023
void CGDebugInfo::addHeapAllocSiteMetadata(llvm::Instruction *CI,
2024
                                           QualType D,
2025
5
                                           SourceLocation Loc) {
2026
5
  llvm::MDNode *node;
2027
5
  if (D.getTypePtr()->isVoidPointerType()) {
2028
3
    node = llvm::MDNode::get(CGM.getLLVMContext(), None);
2029
3
  } else {
2030
2
    QualType PointeeTy = D.getTypePtr()->getPointeeType();
2031
2
    node = getOrCreateType(PointeeTy, getOrCreateFile(Loc));
2032
2
  }
2033
5
2034
5
  CI->setMetadata("heapallocsite", node);
2035
5
}
2036
2037
21.9k
void CGDebugInfo::completeType(const EnumDecl *ED) {
2038
21.9k
  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2039
21.8k
    return;
2040
90
  QualType Ty = CGM.getContext().getEnumType(ED);
2041
90
  void *TyPtr = Ty.getAsOpaquePtr();
2042
90
  auto I = TypeCache.find(TyPtr);
2043
90
  if (I == TypeCache.end() || 
!cast<llvm::DIType>(I->second)->isForwardDecl()3
)
2044
89
    return;
2045
1
  llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<EnumType>());
2046
1
  assert(!Res->isForwardDecl());
2047
1
  TypeCache[TyPtr].reset(Res);
2048
1
}
2049
2050
619k
void CGDebugInfo::completeType(const RecordDecl *RD) {
2051
619k
  if (DebugKind > codegenoptions::LimitedDebugInfo ||
2052
619k
      
!CGM.getLangOpts().CPlusPlus619k
)
2053
335
    completeRequiredType(RD);
2054
619k
}
2055
2056
/// Return true if the class or any of its methods are marked dllimport.
2057
7.13k
static bool isClassOrMethodDLLImport(const CXXRecordDecl *RD) {
2058
7.13k
  if (RD->hasAttr<DLLImportAttr>())
2059
4
    return true;
2060
7.13k
  for (const CXXMethodDecl *MD : RD->methods())
2061
84.8k
    if (MD->hasAttr<DLLImportAttr>())
2062
2
      return true;
2063
7.13k
  
return false7.13k
;
2064
7.13k
}
2065
2066
/// Does a type definition exist in an imported clang module?
2067
308
static bool isDefinedInClangModule(const RecordDecl *RD) {
2068
308
  // Only definitions that where imported from an AST file come from a module.
2069
308
  if (!RD || 
!RD->isFromASTFile()286
)
2070
192
    return false;
2071
116
  // Anonymous entities cannot be addressed. Treat them as not from module.
2072
116
  if (!RD->isExternallyVisible() && 
RD->getName().empty()20
)
2073
16
    return false;
2074
100
  if (auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) {
2075
82
    if (!CXXDecl->isCompleteDefinition())
2076
1
      return false;
2077
81
    // Check wether RD is a template.
2078
81
    auto TemplateKind = CXXDecl->getTemplateSpecializationKind();
2079
81
    if (TemplateKind != TSK_Undeclared) {
2080
55
      // Unfortunately getOwningModule() isn't accurate enough to find the
2081
55
      // owning module of a ClassTemplateSpecializationDecl that is inside a
2082
55
      // namespace spanning multiple modules.
2083
55
      bool Explicit = false;
2084
55
      if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(CXXDecl))
2085
49
        Explicit = TD->isExplicitInstantiationOrSpecialization();
2086
55
      if (!Explicit && 
CXXDecl->getEnclosingNamespaceContext()41
)
2087
41
        return false;
2088
14
      // This is a template, check the origin of the first member.
2089
14
      if (CXXDecl->field_begin() == CXXDecl->field_end())
2090
6
        return TemplateKind == TSK_ExplicitInstantiationDeclaration;
2091
8
      if (!CXXDecl->field_begin()->isFromASTFile())
2092
0
        return false;
2093
52
    }
2094
81
  }
2095
52
  return true;
2096
52
}
2097
2098
1.41k
void CGDebugInfo::completeClassData(const RecordDecl *RD) {
2099
1.41k
  if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD))
2100
1.41k
    if (CXXRD->isDynamicClass() &&
2101
1.41k
        CGM.getVTableLinkage(CXXRD) ==
2102
1.39k
            llvm::GlobalValue::AvailableExternallyLinkage &&
2103
1.41k
        
!isClassOrMethodDLLImport(CXXRD)162
)
2104
161
      return;
2105
1.24k
2106
1.24k
  if (DebugTypeExtRefs && 
isDefinedInClangModule(RD->getDefinition())5
)
2107
2
    return;
2108
1.24k
2109
1.24k
  completeClass(RD);
2110
1.24k
}
2111
2112
1.24k
void CGDebugInfo::completeClass(const RecordDecl *RD) {
2113
1.24k
  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2114
1.10k
    return;
2115
146
  QualType Ty = CGM.getContext().getRecordType(RD);
2116
146
  void *TyPtr = Ty.getAsOpaquePtr();
2117
146
  auto I = TypeCache.find(TyPtr);
2118
146
  if (I != TypeCache.end() && 
!cast<llvm::DIType>(I->second)->isForwardDecl()140
)
2119
53
    return;
2120
93
  llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<RecordType>());
2121
93
  assert(!Res->isForwardDecl());
2122
93
  TypeCache[TyPtr].reset(Res);
2123
93
}
2124
2125
static bool hasExplicitMemberDefinition(CXXRecordDecl::method_iterator I,
2126
776
                                        CXXRecordDecl::method_iterator End) {
2127
776
  for (CXXMethodDecl *MD : llvm::make_range(I, End))
2128
2.95k
    if (FunctionDecl *Tmpl = MD->getInstantiatedFromMemberFunction())
2129
2.93k
      if (!Tmpl->isImplicit() && Tmpl->isThisDeclarationADefinition() &&
2130
2.93k
          
!MD->getMemberSpecializationInfo()->isExplicitSpecialization()438
)
2131
437
        return true;
2132
776
  
return false339
;
2133
776
}
2134
2135
static bool shouldOmitDefinition(codegenoptions::DebugInfoKind DebugKind,
2136
                                 bool DebugTypeExtRefs, const RecordDecl *RD,
2137
525k
                                 const LangOptions &LangOpts) {
2138
525k
  if (DebugTypeExtRefs && 
isDefinedInClangModule(RD->getDefinition())303
)
2139
52
    return true;
2140
525k
2141
525k
  if (auto *ES = RD->getASTContext().getExternalSource())
2142
347
    if (ES->hasExternalDefinitions(RD) == ExternalASTSource::EK_Always)
2143
5
      return true;
2144
525k
2145
525k
  if (DebugKind > codegenoptions::LimitedDebugInfo)
2146
649
    return false;
2147
524k
2148
524k
  if (!LangOpts.CPlusPlus)
2149
386
    return false;
2150
524k
2151
524k
  if (!RD->isCompleteDefinitionRequired())
2152
120
    return true;
2153
523k
2154
523k
  const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
2155
523k
2156
523k
  if (!CXXDecl)
2157
0
    return false;
2158
523k
2159
523k
  // Only emit complete debug info for a dynamic class when its vtable is
2160
523k
  // emitted.  However, Microsoft debuggers don't resolve type information
2161
523k
  // across DLL boundaries, so skip this optimization if the class or any of its
2162
523k
  // methods are marked dllimport. This isn't a complete solution, since objects
2163
523k
  // without any dllimport methods can be used in one DLL and constructed in
2164
523k
  // another, but it is the current behavior of LimitedDebugInfo.
2165
523k
  if (CXXDecl->hasDefinition() && CXXDecl->isDynamicClass() &&
2166
523k
      
!isClassOrMethodDLLImport(CXXDecl)6.97k
)
2167
6.97k
    return true;
2168
516k
2169
516k
  TemplateSpecializationKind Spec = TSK_Undeclared;
2170
516k
  if (const auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD))
2171
397k
    Spec = SD->getSpecializationKind();
2172
516k
2173
516k
  if (Spec == TSK_ExplicitInstantiationDeclaration &&
2174
516k
      hasExplicitMemberDefinition(CXXDecl->method_begin(),
2175
776
                                  CXXDecl->method_end()))
2176
437
    return true;
2177
516k
2178
516k
  return false;
2179
516k
}
2180
2181
523k
void CGDebugInfo::completeRequiredType(const RecordDecl *RD) {
2182
523k
  if (shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, CGM.getLangOpts()))
2183
7.28k
    return;
2184
516k
2185
516k
  QualType Ty = CGM.getContext().getRecordType(RD);
2186
516k
  llvm::DIType *T = getTypeOrNull(Ty);
2187
516k
  if (T && 
T->isForwardDecl()77
)
2188
11
    completeClassData(RD);
2189
516k
}
2190
2191
1.23k
llvm::DIType *CGDebugInfo::CreateType(const RecordType *Ty) {
2192
1.23k
  RecordDecl *RD = Ty->getDecl();
2193
1.23k
  llvm::DIType *T = cast_or_null<llvm::DIType>(getTypeOrNull(QualType(Ty, 0)));
2194
1.23k
  if (T || shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD,
2195
1.23k
                                CGM.getLangOpts())) {
2196
301
    if (!T)
2197
301
      T = getOrCreateRecordFwdDecl(Ty, getDeclContextDescriptor(RD));
2198
301
    return T;
2199
301
  }
2200
937
2201
937
  return CreateTypeDefinition(Ty);
2202
937
}
2203
2204
1.03k
llvm::DIType *CGDebugInfo::CreateTypeDefinition(const RecordType *Ty) {
2205
1.03k
  RecordDecl *RD = Ty->getDecl();
2206
1.03k
2207
1.03k
  // Get overall information about the record type for the debug info.
2208
1.03k
  llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
2209
1.03k
2210
1.03k
  // Records and classes and unions can all be recursive.  To handle them, we
2211
1.03k
  // first generate a debug descriptor for the struct as a forward declaration.
2212
1.03k
  // Then (if it is a definition) we go through and get debug info for all of
2213
1.03k
  // its members.  Finally, we create a descriptor for the complete type (which
2214
1.03k
  // may refer to the forward decl if the struct is recursive) and replace all
2215
1.03k
  // uses of the forward declaration with the final definition.
2216
1.03k
  llvm::DICompositeType *FwdDecl = getOrCreateLimitedType(Ty, DefUnit);
2217
1.03k
2218
1.03k
  const RecordDecl *D = RD->getDefinition();
2219
1.03k
  if (!D || 
!D->isCompleteDefinition()985
)
2220
46
    return FwdDecl;
2221
984
2222
984
  if (const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD))
2223
842
    CollectContainingType(CXXDecl, FwdDecl);
2224
984
2225
984
  // Push the struct on region stack.
2226
984
  LexicalBlockStack.emplace_back(&*FwdDecl);
2227
984
  RegionMap[Ty->getDecl()].reset(FwdDecl);
2228
984
2229
984
  // Convert all the elements.
2230
984
  SmallVector<llvm::Metadata *, 16> EltTys;
2231
984
  // what about nested types?
2232
984
2233
984
  // Note: The split of CXXDecl information here is intentional, the
2234
984
  // gdb tests will depend on a certain ordering at printout. The debug
2235
984
  // information offsets are still correct if we merge them all together
2236
984
  // though.
2237
984
  const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
2238
984
  if (CXXDecl) {
2239
842
    CollectCXXBases(CXXDecl, DefUnit, EltTys, FwdDecl);
2240
842
    CollectVTableInfo(CXXDecl, DefUnit, EltTys, FwdDecl);
2241
842
  }
2242
984
2243
984
  // Collect data fields (including static variables and any initializers).
2244
984
  CollectRecordFields(RD, DefUnit, EltTys, FwdDecl);
2245
984
  if (CXXDecl)
2246
842
    CollectCXXMemberFunctions(CXXDecl, DefUnit, EltTys, FwdDecl);
2247
984
2248
984
  LexicalBlockStack.pop_back();
2249
984
  RegionMap.erase(Ty->getDecl());
2250
984
2251
984
  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
2252
984
  DBuilder.replaceArrays(FwdDecl, Elements);
2253
984
2254
984
  if (FwdDecl->isTemporary())
2255
0
    FwdDecl =
2256
0
        llvm::MDNode::replaceWithPermanent(llvm::TempDICompositeType(FwdDecl));
2257
984
2258
984
  RegionMap[Ty->getDecl()].reset(FwdDecl);
2259
984
  return FwdDecl;
2260
984
}
2261
2262
llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectType *Ty,
2263
37
                                      llvm::DIFile *Unit) {
2264
37
  // Ignore protocols.
2265
37
  return getOrCreateType(Ty->getBaseType(), Unit);
2266
37
}
2267
2268
llvm::DIType *CGDebugInfo::CreateType(const ObjCTypeParamType *Ty,
2269
0
                                      llvm::DIFile *Unit) {
2270
0
  // Ignore protocols.
2271
0
  SourceLocation Loc = Ty->getDecl()->getLocation();
2272
0
2273
0
  // Use Typedefs to represent ObjCTypeParamType.
2274
0
  return DBuilder.createTypedef(
2275
0
      getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit),
2276
0
      Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc),
2277
0
      getDeclContextDescriptor(Ty->getDecl()));
2278
0
}
2279
2280
/// \return true if Getter has the default name for the property PD.
2281
static bool hasDefaultGetterName(const ObjCPropertyDecl *PD,
2282
73
                                 const ObjCMethodDecl *Getter) {
2283
73
  assert(PD);
2284
73
  if (!Getter)
2285
0
    return true;
2286
73
2287
73
  assert(Getter->getDeclName().isObjCZeroArgSelector());
2288
73
  return PD->getName() ==
2289
73
         Getter->getDeclName().getObjCSelector().getNameForSlot(0);
2290
73
}
2291
2292
/// \return true if Setter has the default name for the property PD.
2293
static bool hasDefaultSetterName(const ObjCPropertyDecl *PD,
2294
73
                                 const ObjCMethodDecl *Setter) {
2295
73
  assert(PD);
2296
73
  if (!Setter)
2297
10
    return true;
2298
63
2299
63
  assert(Setter->getDeclName().isObjCOneArgSelector());
2300
63
  return SelectorTable::constructSetterName(PD->getName()) ==
2301
63
         Setter->getDeclName().getObjCSelector().getNameForSlot(0);
2302
63
}
2303
2304
llvm::DIType *CGDebugInfo::CreateType(const ObjCInterfaceType *Ty,
2305
141
                                      llvm::DIFile *Unit) {
2306
141
  ObjCInterfaceDecl *ID = Ty->getDecl();
2307
141
  if (!ID)
2308
0
    return nullptr;
2309
141
2310
141
  // Return a forward declaration if this type was imported from a clang module,
2311
141
  // and this is not the compile unit with the implementation of the type (which
2312
141
  // may contain hidden ivars).
2313
141
  if (DebugTypeExtRefs && 
ID->isFromASTFile()19
&&
ID->getDefinition()6
&&
2314
141
      
!ID->getImplementation()6
)
2315
3
    return DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type,
2316
3
                                      ID->getName(),
2317
3
                                      getDeclContextDescriptor(ID), Unit, 0);
2318
138
2319
138
  // Get overall information about the record type for the debug info.
2320
138
  llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation());
2321
138
  unsigned Line = getLineNumber(ID->getLocation());
2322
138
  auto RuntimeLang =
2323
138
      static_cast<llvm::dwarf::SourceLanguage>(TheCU->getSourceLanguage());
2324
138
2325
138
  // If this is just a forward declaration return a special forward-declaration
2326
138
  // debug type since we won't be able to lay out the entire type.
2327
138
  ObjCInterfaceDecl *Def = ID->getDefinition();
2328
138
  if (!Def || 
!Def->getImplementation()123
) {
2329
82
    llvm::DIScope *Mod = getParentModuleOrNull(ID);
2330
82
    llvm::DIType *FwdDecl = DBuilder.createReplaceableCompositeType(
2331
82
        llvm::dwarf::DW_TAG_structure_type, ID->getName(), Mod ? 
Mod13
:
TheCU69
,
2332
82
        DefUnit, Line, RuntimeLang);
2333
82
    ObjCInterfaceCache.push_back(ObjCInterfaceCacheEntry(Ty, FwdDecl, Unit));
2334
82
    return FwdDecl;
2335
82
  }
2336
56
2337
56
  return CreateTypeDefinition(Ty, Unit);
2338
56
}
2339
2340
llvm::DIModule *
2341
CGDebugInfo::getOrCreateModuleRef(ExternalASTSource::ASTSourceDescriptor Mod,
2342
419
                                  bool CreateSkeletonCU) {
2343
419
  // Use the Module pointer as the key into the cache. This is a
2344
419
  // nullptr if the "Module" is a PCH, which is safe because we don't
2345
419
  // support chained PCH debug info, so there can only be a single PCH.
2346
419
  const Module *M = Mod.getModuleOrNull();
2347
419
  auto ModRef = ModuleCache.find(M);
2348
419
  if (ModRef != ModuleCache.end())
2349
363
    return cast<llvm::DIModule>(ModRef->second);
2350
56
2351
56
  // Macro definitions that were defined with "-D" on the command line.
2352
56
  SmallString<128> ConfigMacros;
2353
56
  {
2354
56
    llvm::raw_svector_ostream OS(ConfigMacros);
2355
56
    const auto &PPOpts = CGM.getPreprocessorOpts();
2356
56
    unsigned I = 0;
2357
56
    // Translate the macro definitions back into a command line.
2358
56
    for (auto &M : PPOpts.Macros) {
2359
17
      if (++I > 1)
2360
3
        OS << " ";
2361
17
      const std::string &Macro = M.first;
2362
17
      bool Undef = M.second;
2363
17
      OS << "\"-" << (Undef ? 
'U'1
:
'D'16
);
2364
17
      for (char c : Macro)
2365
139
        switch (c) {
2366
139
        case '\\':
2367
0
          OS << "\\\\";
2368
0
          break;
2369
139
        case '"':
2370
0
          OS << "\\\"";
2371
0
          break;
2372
139
        default:
2373
139
          OS << c;
2374
139
        }
2375
17
      OS << '\"';
2376
17
    }
2377
56
  }
2378
56
2379
56
  bool IsRootModule = M ? 
!M->Parent36
:
true20
;
2380
56
  // When a module name is specified as -fmodule-name, that module gets a
2381
56
  // clang::Module object, but it won't actually be built or imported; it will
2382
56
  // be textual.
2383
56
  if (CreateSkeletonCU && 
IsRootModule25
&&
Mod.getASTFile().empty()20
&&
M1
)
2384
56
    assert(StringRef(M->Name).startswith(CGM.getLangOpts().ModuleName) &&
2385
56
           "clang module without ASTFile must be specified by -fmodule-name");
2386
56
2387
56
  if (CreateSkeletonCU && 
IsRootModule25
&&
!Mod.getASTFile().empty()20
) {
2388
19
    // PCH files don't have a signature field in the control block,
2389
19
    // but LLVM detects skeleton CUs by looking for a non-zero DWO id.
2390
19
    // We use the lower 64 bits for debug info.
2391
19
    uint64_t Signature =
2392
19
        Mod.getSignature()
2393
19
            ? 
(uint64_t)Mod.getSignature()[1] << 32 | Mod.getSignature()[0]10
2394
19
            : 
~1ULL9
;
2395
19
    llvm::DIBuilder DIB(CGM.getModule());
2396
19
    DIB.createCompileUnit(TheCU->getSourceLanguage(),
2397
19
                          // TODO: Support "Source" from external AST providers?
2398
19
                          DIB.createFile(Mod.getModuleName(), Mod.getPath()),
2399
19
                          TheCU->getProducer(), true, StringRef(), 0,
2400
19
                          Mod.getASTFile(), llvm::DICompileUnit::FullDebug,
2401
19
                          Signature);
2402
19
    DIB.finalize();
2403
19
  }
2404
56
2405
56
  llvm::DIModule *Parent =
2406
56
      IsRootModule ? 
nullptr47
2407
56
                   : getOrCreateModuleRef(
2408
9
                         ExternalASTSource::ASTSourceDescriptor(*M->Parent),
2409
9
                         CreateSkeletonCU);
2410
56
  llvm::DIModule *DIMod =
2411
56
      DBuilder.createModule(Parent, Mod.getModuleName(), ConfigMacros,
2412
56
                            Mod.getPath(), CGM.getHeaderSearchOpts().Sysroot);
2413
56
  ModuleCache[M].reset(DIMod);
2414
56
  return DIMod;
2415
56
}
2416
2417
llvm::DIType *CGDebugInfo::CreateTypeDefinition(const ObjCInterfaceType *Ty,
2418
124
                                                llvm::DIFile *Unit) {
2419
124
  ObjCInterfaceDecl *ID = Ty->getDecl();
2420
124
  llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation());
2421
124
  unsigned Line = getLineNumber(ID->getLocation());
2422
124
  unsigned RuntimeLang = TheCU->getSourceLanguage();
2423
124
2424
124
  // Bit size, align and offset of the type.
2425
124
  uint64_t Size = CGM.getContext().getTypeSize(Ty);
2426
124
  auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2427
124
2428
124
  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2429
124
  if (ID->getImplementation())
2430
59
    Flags |= llvm::DINode::FlagObjcClassComplete;
2431
124
2432
124
  llvm::DIScope *Mod = getParentModuleOrNull(ID);
2433
124
  llvm::DICompositeType *RealDecl = DBuilder.createStructType(
2434
124
      Mod ? 
Mod13
:
Unit111
, ID->getName(), DefUnit, Line, Size, Align, Flags,
2435
124
      nullptr, llvm::DINodeArray(), RuntimeLang);
2436
124
2437
124
  QualType QTy(Ty, 0);
2438
124
  TypeCache[QTy.getAsOpaquePtr()].reset(RealDecl);
2439
124
2440
124
  // Push the struct on region stack.
2441
124
  LexicalBlockStack.emplace_back(RealDecl);
2442
124
  RegionMap[Ty->getDecl()].reset(RealDecl);
2443
124
2444
124
  // Convert all the elements.
2445
124
  SmallVector<llvm::Metadata *, 16> EltTys;
2446
124
2447
124
  ObjCInterfaceDecl *SClass = ID->getSuperClass();
2448
124
  if (SClass) {
2449
32
    llvm::DIType *SClassTy =
2450
32
        getOrCreateType(CGM.getContext().getObjCInterfaceType(SClass), Unit);
2451
32
    if (!SClassTy)
2452
0
      return nullptr;
2453
32
2454
32
    llvm::DIType *InhTag = DBuilder.createInheritance(RealDecl, SClassTy, 0, 0,
2455
32
                                                      llvm::DINode::FlagZero);
2456
32
    EltTys.push_back(InhTag);
2457
32
  }
2458
124
2459
124
  // Create entries for all of the properties.
2460
124
  auto AddProperty = [&](const ObjCPropertyDecl *PD) {
2461
43
    SourceLocation Loc = PD->getLocation();
2462
43
    llvm::DIFile *PUnit = getOrCreateFile(Loc);
2463
43
    unsigned PLine = getLineNumber(Loc);
2464
43
    ObjCMethodDecl *Getter = PD->getGetterMethodDecl();
2465
43
    ObjCMethodDecl *Setter = PD->getSetterMethodDecl();
2466
43
    llvm::MDNode *PropertyNode = DBuilder.createObjCProperty(
2467
43
        PD->getName(), PUnit, PLine,
2468
43
        hasDefaultGetterName(PD, Getter) ? 
""40
2469
43
                                         : 
getSelectorName(PD->getGetterName())3
,
2470
43
        hasDefaultSetterName(PD, Setter) ? 
""41
2471
43
                                         : 
getSelectorName(PD->getSetterName())2
,
2472
43
        PD->getPropertyAttributes(), getOrCreateType(PD->getType(), PUnit));
2473
43
    EltTys.push_back(PropertyNode);
2474
43
  };
2475
124
  {
2476
124
    llvm::SmallPtrSet<const IdentifierInfo *, 16> PropertySet;
2477
124
    for (const ObjCCategoryDecl *ClassExt : ID->known_extensions())
2478
11
      for (auto *PD : ClassExt->properties()) {
2479
7
        PropertySet.insert(PD->getIdentifier());
2480
7
        AddProperty(PD);
2481
7
      }
2482
124
    for (const auto *PD : ID->properties()) {
2483
38
      // Don't emit duplicate metadata for properties that were already in a
2484
38
      // class extension.
2485
38
      if (!PropertySet.insert(PD->getIdentifier()).second)
2486
2
        continue;
2487
36
      AddProperty(PD);
2488
36
    }
2489
124
  }
2490
124
2491
124
  const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID);
2492
124
  unsigned FieldNo = 0;
2493
214
  for (ObjCIvarDecl *Field = ID->all_declared_ivar_begin(); Field;
2494
124
       
Field = Field->getNextIvar(), ++FieldNo90
) {
2495
90
    llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
2496
90
    if (!FieldTy)
2497
0
      return nullptr;
2498
90
2499
90
    StringRef FieldName = Field->getName();
2500
90
2501
90
    // Ignore unnamed fields.
2502
90
    if (FieldName.empty())
2503
2
      continue;
2504
88
2505
88
    // Get the location for the field.
2506
88
    llvm::DIFile *FieldDefUnit = getOrCreateFile(Field->getLocation());
2507
88
    unsigned FieldLine = getLineNumber(Field->getLocation());
2508
88
    QualType FType = Field->getType();
2509
88
    uint64_t FieldSize = 0;
2510
88
    uint32_t FieldAlign = 0;
2511
88
2512
88
    if (!FType->isIncompleteArrayType()) {
2513
88
2514
88
      // Bit size, align and offset of the type.
2515
88
      FieldSize = Field->isBitField()
2516
88
                      ? 
Field->getBitWidthValue(CGM.getContext())4
2517
88
                      : 
CGM.getContext().getTypeSize(FType)84
;
2518
88
      FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext());
2519
88
    }
2520
88
2521
88
    uint64_t FieldOffset;
2522
88
    if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) {
2523
82
      // We don't know the runtime offset of an ivar if we're using the
2524
82
      // non-fragile ABI.  For bitfields, use the bit offset into the first
2525
82
      // byte of storage of the bitfield.  For other fields, use zero.
2526
82
      if (Field->isBitField()) {
2527
4
        FieldOffset =
2528
4
            CGM.getObjCRuntime().ComputeBitfieldBitOffset(CGM, ID, Field);
2529
4
        FieldOffset %= CGM.getContext().getCharWidth();
2530
78
      } else {
2531
78
        FieldOffset = 0;
2532
78
      }
2533
82
    } else {
2534
6
      FieldOffset = RL.getFieldOffset(FieldNo);
2535
6
    }
2536
88
2537
88
    llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2538
88
    if (Field->getAccessControl() == ObjCIvarDecl::Protected)
2539
47
      Flags = llvm::DINode::FlagProtected;
2540
41
    else if (Field->getAccessControl() == ObjCIvarDecl::Private)
2541
30
      Flags = llvm::DINode::FlagPrivate;
2542
11
    else if (Field->getAccessControl() == ObjCIvarDecl::Public)
2543
11
      Flags = llvm::DINode::FlagPublic;
2544
88
2545
88
    llvm::MDNode *PropertyNode = nullptr;
2546
88
    if (ObjCImplementationDecl *ImpD = ID->getImplementation()) {
2547
59
      if (ObjCPropertyImplDecl *PImpD =
2548
30
              ImpD->FindPropertyImplIvarDecl(Field->getIdentifier())) {
2549
30
        if (ObjCPropertyDecl *PD = PImpD->getPropertyDecl()) {
2550
30
          SourceLocation Loc = PD->getLocation();
2551
30
          llvm::DIFile *PUnit = getOrCreateFile(Loc);
2552
30
          unsigned PLine = getLineNumber(Loc);
2553
30
          ObjCMethodDecl *Getter = PD->getGetterMethodDecl();
2554
30
          ObjCMethodDecl *Setter = PD->getSetterMethodDecl();
2555
30
          PropertyNode = DBuilder.createObjCProperty(
2556
30
              PD->getName(), PUnit, PLine,
2557
30
              hasDefaultGetterName(PD, Getter)
2558
30
                  ? 
""29
2559
30
                  : 
getSelectorName(PD->getGetterName())1
,
2560
30
              hasDefaultSetterName(PD, Setter)
2561
30
                  ? 
""29
2562
30
                  : 
getSelectorName(PD->getSetterName())1
,
2563
30
              PD->getPropertyAttributes(),
2564
30
              getOrCreateType(PD->getType(), PUnit));
2565
30
        }
2566
30
      }
2567
59
    }
2568
88
    FieldTy = DBuilder.createObjCIVar(FieldName, FieldDefUnit, FieldLine,
2569
88
                                      FieldSize, FieldAlign, FieldOffset, Flags,
2570
88
                                      FieldTy, PropertyNode);
2571
88
    EltTys.push_back(FieldTy);
2572
88
  }
2573
124
2574
124
  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
2575
124
  DBuilder.replaceArrays(RealDecl, Elements);
2576
124
2577
124
  LexicalBlockStack.pop_back();
2578
124
  return RealDecl;
2579
124
}
2580
2581
llvm::DIType *CGDebugInfo::CreateType(const VectorType *Ty,
2582
15
                                      llvm::DIFile *Unit) {
2583
15
  llvm::DIType *ElementTy = getOrCreateType(Ty->getElementType(), Unit);
2584
15
  int64_t Count = Ty->getNumElements();
2585
15
2586
15
  llvm::Metadata *Subscript;
2587
15
  QualType QTy(Ty, 0);
2588
15
  auto SizeExpr = SizeExprCache.find(QTy);
2589
15
  if (SizeExpr != SizeExprCache.end())
2590
0
    Subscript = DBuilder.getOrCreateSubrange(0, SizeExpr->getSecond());
2591
15
  else
2592
15
    Subscript = DBuilder.getOrCreateSubrange(0, Count ? Count : 
-10
);
2593
15
  llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscript);
2594
15
2595
15
  uint64_t Size = CGM.getContext().getTypeSize(Ty);
2596
15
  auto Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2597
15
2598
15
  return DBuilder.createVectorType(Size, Align, ElementTy, SubscriptArray);
2599
15
}
2600
2601
226
llvm::DIType *CGDebugInfo::CreateType(const ArrayType *Ty, llvm::DIFile *Unit) {
2602
226
  uint64_t Size;
2603
226
  uint32_t Align;
2604
226
2605
226
  // FIXME: make getTypeAlign() aware of VLAs and incomplete array types
2606
226
  if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) {
2607
18
    Size = 0;
2608
18
    Align = getTypeAlignIfRequired(CGM.getContext().getBaseElementType(VAT),
2609
18
                                   CGM.getContext());
2610
208
  } else if (Ty->isIncompleteArrayType()) {
2611
4
    Size = 0;
2612
4
    if (Ty->getElementType()->isIncompleteType())
2613
1
      Align = 0;
2614
3
    else
2615
3
      Align = getTypeAlignIfRequired(Ty->getElementType(), CGM.getContext());
2616
204
  } else if (Ty->isIncompleteType()) {
2617
2
    Size = 0;
2618
2
    Align = 0;
2619
202
  } else {
2620
202
    // Size and align of the whole array, not the element type.
2621
202
    Size = CGM.getContext().getTypeSize(Ty);
2622
202
    Align = getTypeAlignIfRequired(Ty, CGM.getContext());
2623
202
  }
2624
226
2625
226
  // Add the dimensions of the array.  FIXME: This loses CV qualifiers from
2626
226
  // interior arrays, do we care?  Why aren't nested arrays represented the
2627
226
  // obvious/recursive way?
2628
226
  SmallVector<llvm::Metadata *, 8> Subscripts;
2629
226
  QualType EltTy(Ty, 0);
2630
465
  while ((Ty = dyn_cast<ArrayType>(EltTy))) {
2631
239
    // If the number of elements is known, then count is that number. Otherwise,
2632
239
    // it's -1. This allows us to represent a subrange with an array of 0
2633
239
    // elements, like this:
2634
239
    //
2635
239
    //   struct foo {
2636
239
    //     int x[0];
2637
239
    //   };
2638
239
    int64_t Count = -1; // Count == -1 is an unbounded array.
2639
239
    if (const auto *CAT = dyn_cast<ConstantArrayType>(Ty))
2640
216
      Count = CAT->getSize().getZExtValue();
2641
23
    else if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) {
2642
19
      if (Expr *Size = VAT->getSizeExpr()) {
2643
18
        Expr::EvalResult Result;
2644
18
        if (Size->EvaluateAsInt(Result, CGM.getContext()))
2645
1
          Count = Result.Val.getInt().getExtValue();
2646
18
      }
2647
19
    }
2648
239
2649
239
    auto SizeNode = SizeExprCache.find(EltTy);
2650
239
    if (SizeNode != SizeExprCache.end())
2651
16
      Subscripts.push_back(
2652
16
          DBuilder.getOrCreateSubrange(0, SizeNode->getSecond()));
2653
223
    else
2654
223
      Subscripts.push_back(DBuilder.getOrCreateSubrange(0, Count));
2655
239
    EltTy = Ty->getElementType();
2656
239
  }
2657
226
2658
226
  llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscripts);
2659
226
2660
226
  return DBuilder.createArrayType(Size, Align, getOrCreateType(EltTy, Unit),
2661
226
                                  SubscriptArray);
2662
226
}
2663
2664
llvm::DIType *CGDebugInfo::CreateType(const LValueReferenceType *Ty,
2665
166
                                      llvm::DIFile *Unit) {
2666
166
  return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type, Ty,
2667
166
                               Ty->getPointeeType(), Unit);
2668
166
}
2669
2670
llvm::DIType *CGDebugInfo::CreateType(const RValueReferenceType *Ty,
2671
13
                                      llvm::DIFile *Unit) {
2672
13
  return CreatePointerLikeType(llvm::dwarf::DW_TAG_rvalue_reference_type, Ty,
2673
13
                               Ty->getPointeeType(), Unit);
2674
13
}
2675
2676
llvm::DIType *CGDebugInfo::CreateType(const MemberPointerType *Ty,
2677
42
                                      llvm::DIFile *U) {
2678
42
  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
2679
42
  uint64_t Size = 0;
2680
42
2681
42
  if (!Ty->isIncompleteType()) {
2682
39
    Size = CGM.getContext().getTypeSize(Ty);
2683
39
2684
39
    // Set the MS inheritance model. There is no flag for the unspecified model.
2685
39
    if (CGM.getTarget().getCXXABI().isMicrosoft()) {
2686
15
      switch (Ty->getMostRecentCXXRecordDecl()->getMSInheritanceModel()) {
2687
15
      case MSInheritanceAttr::Keyword_single_inheritance:
2688
9
        Flags |= llvm::DINode::FlagSingleInheritance;
2689
9
        break;
2690
15
      case MSInheritanceAttr::Keyword_multiple_inheritance:
2691
2
        Flags |= llvm::DINode::FlagMultipleInheritance;
2692
2
        break;
2693
15
      case MSInheritanceAttr::Keyword_virtual_inheritance:
2694
2
        Flags |= llvm::DINode::FlagVirtualInheritance;
2695
2
        break;
2696
15
      case MSInheritanceAttr::Keyword_unspecified_inheritance:
2697
2
        break;
2698
42
      }
2699
42
    }
2700
39
  }
2701
42
2702
42
  llvm::DIType *ClassType = getOrCreateType(QualType(Ty->getClass(), 0), U);
2703
42
  if (Ty->isMemberDataPointerType())
2704
20
    return DBuilder.createMemberPointerType(
2705
20
        getOrCreateType(Ty->getPointeeType(), U), ClassType, Size, /*Align=*/0,
2706
20
        Flags);
2707
22
2708
22
  const FunctionProtoType *FPT =
2709
22
      Ty->getPointeeType()->getAs<FunctionProtoType>();
2710
22
  return DBuilder.createMemberPointerType(
2711
22
      getOrCreateInstanceMethodType(
2712
22
          CXXMethodDecl::getThisType(FPT, Ty->getMostRecentCXXRecordDecl()),
2713
22
          FPT, U),
2714
22
      ClassType, Size, /*Align=*/0, Flags);
2715
22
}
2716
2717
1
llvm::DIType *CGDebugInfo::CreateType(const AtomicType *Ty, llvm::DIFile *U) {
2718
1
  auto *FromTy = getOrCreateType(Ty->getValueType(), U);
2719
1
  return DBuilder.createQualifiedType(llvm::dwarf::DW_TAG_atomic_type, FromTy);
2720
1
}
2721
2722
0
llvm::DIType *CGDebugInfo::CreateType(const PipeType *Ty, llvm::DIFile *U) {
2723
0
  return getOrCreateType(Ty->getElementType(), U);
2724
0
}
2725
2726
124
llvm::DIType *CGDebugInfo::CreateEnumType(const EnumType *Ty) {
2727
124
  const EnumDecl *ED = Ty->getDecl();
2728
124
2729
124
  uint64_t Size = 0;
2730
124
  uint32_t Align = 0;
2731
124
  if (!ED->getTypeForDecl()->isIncompleteType()) {
2732
122
    Size = CGM.getContext().getTypeSize(ED->getTypeForDecl());
2733
122
    Align = getDeclAlignIfRequired(ED, CGM.getContext());
2734
122
  }
2735
124
2736
124
  SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
2737
124
2738
124
  bool isImportedFromModule =
2739
124
      DebugTypeExtRefs && 
ED->isFromASTFile()39
&&
ED->getDefinition()18
;
2740
124
2741
124
  // If this is just a forward declaration, construct an appropriately
2742
124
  // marked node and just return it.
2743
124
  if (isImportedFromModule || 
!ED->getDefinition()106
) {
2744
26
    // Note that it is possible for enums to be created as part of
2745
26
    // their own declcontext. In this case a FwdDecl will be created
2746
26
    // twice. This doesn't cause a problem because both FwdDecls are
2747
26
    // entered into the ReplaceMap: finalize() will replace the first
2748
26
    // FwdDecl with the second and then replace the second with
2749
26
    // complete type.
2750
26
    llvm::DIScope *EDContext = getDeclContextDescriptor(ED);
2751
26
    llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
2752
26
    llvm::TempDIScope TmpContext(DBuilder.createReplaceableCompositeType(
2753
26
        llvm::dwarf::DW_TAG_enumeration_type, "", TheCU, DefUnit, 0));
2754
26
2755
26
    unsigned Line = getLineNumber(ED->getLocation());
2756
26
    StringRef EDName = ED->getName();
2757
26
    llvm::DIType *RetTy = DBuilder.createReplaceableCompositeType(
2758
26
        llvm::dwarf::DW_TAG_enumeration_type, EDName, EDContext, DefUnit, Line,
2759
26
        0, Size, Align, llvm::DINode::FlagFwdDecl, Identifier);
2760
26
2761
26
    ReplaceMap.emplace_back(
2762
26
        std::piecewise_construct, std::make_tuple(Ty),
2763
26
        std::make_tuple(static_cast<llvm::Metadata *>(RetTy)));
2764
26
    return RetTy;
2765
26
  }
2766
98
2767
98
  return CreateTypeDefinition(Ty);
2768
98
}
2769
2770
99
llvm::DIType *CGDebugInfo::CreateTypeDefinition(const EnumType *Ty) {
2771
99
  const EnumDecl *ED = Ty->getDecl();
2772
99
  uint64_t Size = 0;
2773
99
  uint32_t Align = 0;
2774
99
  if (!ED->getTypeForDecl()->isIncompleteType()) {
2775
99
    Size = CGM.getContext().getTypeSize(ED->getTypeForDecl());
2776
99
    Align = getDeclAlignIfRequired(ED, CGM.getContext());
2777
99
  }
2778
99
2779
99
  SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
2780
99
2781
99
  // Create elements for each enumerator.
2782
99
  SmallVector<llvm::Metadata *, 16> Enumerators;
2783
99
  ED = ED->getDefinition();
2784
99
  bool IsSigned = ED->getIntegerType()->isSignedIntegerType();
2785
99
  for (const auto *Enum : ED->enumerators()) {
2786
79
    const auto &InitVal = Enum->getInitVal();
2787
79
    auto Value = IsSigned ? 
InitVal.getSExtValue()31
:
InitVal.getZExtValue()48
;
2788
79
    Enumerators.push_back(
2789
79
        DBuilder.createEnumerator(Enum->getName(), Value, !IsSigned));
2790
79
  }
2791
99
2792
99
  // Return a CompositeType for the enum itself.
2793
99
  llvm::DINodeArray EltArray = DBuilder.getOrCreateArray(Enumerators);
2794
99
2795
99
  llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
2796
99
  unsigned Line = getLineNumber(ED->getLocation());
2797
99
  llvm::DIScope *EnumContext = getDeclContextDescriptor(ED);
2798
99
  llvm::DIType *ClassTy = getOrCreateType(ED->getIntegerType(), DefUnit);
2799
99
  return DBuilder.createEnumerationType(EnumContext, ED->getName(), DefUnit,
2800
99
                                        Line, Size, Align, EltArray, ClassTy,
2801
99
                                        Identifier, ED->isScoped());
2802
99
}
2803
2804
llvm::DIMacro *CGDebugInfo::CreateMacro(llvm::DIMacroFile *Parent,
2805
                                        unsigned MType, SourceLocation LineLoc,
2806
1.41k
                                        StringRef Name, StringRef Value) {
2807
1.41k
  unsigned Line = LineLoc.isInvalid() ? 
01.36k
:
getLineNumber(LineLoc)45
;
2808
1.41k
  return DBuilder.createMacro(Parent, Line, MType, Name, Value);
2809
1.41k
}
2810
2811
llvm::DIMacroFile *CGDebugInfo::CreateTempMacroFile(llvm::DIMacroFile *Parent,
2812
                                                    SourceLocation LineLoc,
2813
20
                                                    SourceLocation FileLoc) {
2814
20
  llvm::DIFile *FName = getOrCreateFile(FileLoc);
2815
20
  unsigned Line = LineLoc.isInvalid() ? 
010
:
getLineNumber(LineLoc)10
;
2816
20
  return DBuilder.createTempMacroFile(Parent, Line, FName);
2817
20
}
2818
2819
557k
static QualType UnwrapTypeForDebugInfo(QualType T, const ASTContext &C) {
2820
557k
  Qualifiers Quals;
2821
558k
  do {
2822
558k
    Qualifiers InnerQuals = T.getLocalQualifiers();
2823
558k
    // Qualifiers::operator+() doesn't like it if you add a Qualifier
2824
558k
    // that is already there.
2825
558k
    Quals += Qualifiers::removeCommonQualifiers(Quals, InnerQuals);
2826
558k
    Quals += InnerQuals;
2827
558k
    QualType LastT = T;
2828
558k
    switch (T->getTypeClass()) {
2829
558k
    default:
2830
557k
      return C.getQualifiedType(T.getTypePtr(), Quals);
2831
558k
    case Type::TemplateSpecialization: {
2832
215
      const auto *Spec = cast<TemplateSpecializationType>(T);
2833
215
      if (Spec->isTypeAlias())
2834
10
        return C.getQualifiedType(T.getTypePtr(), Quals);
2835
205
      T = Spec->desugar();
2836
205
      break;
2837
205
    }
2838
205
    case Type::TypeOfExpr:
2839
4
      T = cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType();
2840
4
      break;
2841
205
    case Type::TypeOf:
2842
0
      T = cast<TypeOfType>(T)->getUnderlyingType();
2843
0
      break;
2844
205
    case Type::Decltype:
2845
45
      T = cast<DecltypeType>(T)->getUnderlyingType();
2846
45
      break;
2847
205
    case Type::UnaryTransform:
2848
0
      T = cast<UnaryTransformType>(T)->getUnderlyingType();
2849
0
      break;
2850
205
    case Type::Attributed:
2851
10
      T = cast<AttributedType>(T)->getEquivalentType();
2852
10
      break;
2853
445
    case Type::Elaborated:
2854
445
      T = cast<ElaboratedType>(T)->getNamedType();
2855
445
      break;
2856
205
    case Type::Paren:
2857
30
      T = cast<ParenType>(T)->getInnerType();
2858
30
      break;
2859
205
    case Type::MacroQualified:
2860
0
      T = cast<MacroQualifiedType>(T)->getUnderlyingType();
2861
0
      break;
2862
233
    case Type::SubstTemplateTypeParm:
2863
233
      T = cast<SubstTemplateTypeParmType>(T)->getReplacementType();
2864
233
      break;
2865
205
    case Type::Auto:
2866
52
    case Type::DeducedTemplateSpecialization: {
2867
52
      QualType DT = cast<DeducedType>(T)->getDeducedType();
2868
52
      assert(!DT.isNull() && "Undeduced types shouldn't reach here.");
2869
52
      T = DT;
2870
52
      break;
2871
52
    }
2872
63
    case Type::Adjusted:
2873
63
    case Type::Decayed:
2874
63
      // Decayed and adjusted types use the adjusted type in LLVM and DWARF.
2875
63
      T = cast<AdjustedType>(T)->getAdjustedType();
2876
63
      break;
2877
1.08k
    }
2878
1.08k
2879
1.08k
    assert(T != LastT && "Type unwrapping failed to unwrap!");
2880
1.08k
    (void)LastT;
2881
1.08k
  } while (true);
2882
557k
}
2883
2884
539k
llvm::DIType *CGDebugInfo::getTypeOrNull(QualType Ty) {
2885
539k
2886
539k
  // Unwrap the type as needed for debug information.
2887
539k
  Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext());
2888
539k
2889
539k
  auto It = TypeCache.find(Ty.getAsOpaquePtr());
2890
539k
  if (It != TypeCache.end()) {
2891
12.6k
    // Verify that the debug info still exists.
2892
12.6k
    if (llvm::Metadata *V = It->second)
2893
12.0k
      return cast<llvm::DIType>(V);
2894
527k
  }
2895
527k
2896
527k
  return nullptr;
2897
527k
}
2898
2899
void CGDebugInfo::completeTemplateDefinition(
2900
7
    const ClassTemplateSpecializationDecl &SD) {
2901
7
  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2902
4
    return;
2903
3
  completeUnusedClass(SD);
2904
3
}
2905
2906
7
void CGDebugInfo::completeUnusedClass(const CXXRecordDecl &D) {
2907
7
  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
2908
0
    return;
2909
7
2910
7
  completeClassData(&D);
2911
7
  // In case this type has no member function definitions being emitted, ensure
2912
7
  // it is retained
2913
7
  RetainedTypes.push_back(CGM.getContext().getRecordType(&D).getAsOpaquePtr());
2914
7
}
2915
2916
18.6k
llvm::DIType *CGDebugInfo::getOrCreateType(QualType Ty, llvm::DIFile *Unit) {
2917
18.6k
  if (Ty.isNull())
2918
0
    return nullptr;
2919
18.6k
2920
18.6k
  // Unwrap the type as needed for debug information.
2921
18.6k
  Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext());
2922
18.6k
2923
18.6k
  if (auto *T = getTypeOrNull(Ty))
2924
11.6k
    return T;
2925
7.02k
2926
7.02k
  llvm::DIType *Res = CreateTypeNode(Ty, Unit);
2927
7.02k
  void *TyPtr = Ty.getAsOpaquePtr();
2928
7.02k
2929
7.02k
  // And update the type cache.
2930
7.02k
  TypeCache[TyPtr].reset(Res);
2931
7.02k
2932
7.02k
  return Res;
2933
7.02k
}
2934
2935
5.31k
llvm::DIModule *CGDebugInfo::getParentModuleOrNull(const Decl *D) {
2936
5.31k
  // A forward declaration inside a module header does not belong to the module.
2937
5.31k
  if (isa<RecordDecl>(D) && 
!cast<RecordDecl>(D)->getDefinition()2.12k
)
2938
110
    return nullptr;
2939
5.20k
  if (DebugTypeExtRefs && 
D->isFromASTFile()489
) {
2940
177
    // Record a reference to an imported clang module or precompiled header.
2941
177
    auto *Reader = CGM.getContext().getExternalSource();
2942
177
    auto Idx = D->getOwningModuleID();
2943
177
    auto Info = Reader->getSourceDescriptor(Idx);
2944
177
    if (Info)
2945
177
      return getOrCreateModuleRef(*Info, /*SkeletonCU=*/true);
2946
5.02k
  } else if (ClangModuleMap) {
2947
221
    // We are building a clang module or a precompiled header.
2948
221
    //
2949
221
    // TODO: When D is a CXXRecordDecl or a C++ Enum, the ODR applies
2950
221
    // and it wouldn't be necessary to specify the parent scope
2951
221
    // because the type is already unique by definition (it would look
2952
221
    // like the output of -fno-standalone-debug). On the other hand,
2953
221
    // the parent scope helps a consumer to quickly locate the object
2954
221
    // file where the type's definition is located, so it might be
2955
221
    // best to make this behavior a command line or debugger tuning
2956
221
    // option.
2957
221
    if (Module *M = D->getOwningModule()) {
2958
130
      // This is a (sub-)module.
2959
130
      auto Info = ExternalASTSource::ASTSourceDescriptor(*M);
2960
130
      return getOrCreateModuleRef(Info, /*SkeletonCU=*/false);
2961
130
    } else {
2962
91
      // This the precompiled header being built.
2963
91
      return getOrCreateModuleRef(PCHDescriptor, /*SkeletonCU=*/false);
2964
91
    }
2965
4.80k
  }
2966
4.80k
2967
4.80k
  return nullptr;
2968
4.80k
}
2969
2970
7.02k
llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit) {
2971
7.02k
  // Handle qualifiers, which recursively handles what they refer to.
2972
7.02k
  if (Ty.hasLocalQualifiers())
2973
458
    return CreateQualifiedType(Ty, Unit);
2974
6.56k
2975
6.56k
  // Work out details of type.
2976
6.56k
  switch (Ty->getTypeClass()) {
2977
6.56k
#define TYPE(Class, Base)
2978
6.56k
#define ABSTRACT_TYPE(Class, Base)
2979
6.56k
#define NON_CANONICAL_TYPE(Class, Base)
2980
6.56k
#define DEPENDENT_TYPE(Class, Base) 
case Type::Class:0
2981
6.56k
#include "clang/AST/TypeNodes.def"
2982
0
    llvm_unreachable("Dependent types cannot show up in debug information");
2983
0
2984
15
  case Type::ExtVector:
2985
15
  case Type::Vector:
2986
15
    return CreateType(cast<VectorType>(Ty), Unit);
2987
142
  case Type::ObjCObjectPointer:
2988
142
    return CreateType(cast<ObjCObjectPointerType>(Ty), Unit);
2989
37
  case Type::ObjCObject:
2990
37
    return CreateType(cast<ObjCObjectType>(Ty), Unit);
2991
15
  case Type::ObjCTypeParam:
2992
0
    return CreateType(cast<ObjCTypeParamType>(Ty), Unit);
2993
141
  case Type::ObjCInterface:
2994
141
    return CreateType(cast<ObjCInterfaceType>(Ty), Unit);
2995
1.77k
  case Type::Builtin:
2996
1.77k
    return CreateType(cast<BuiltinType>(Ty));
2997
15
  case Type::Complex:
2998
4
    return CreateType(cast<ComplexType>(Ty));
2999
1.05k
  case Type::Pointer:
3000
1.05k
    return CreateType(cast<PointerType>(Ty), Unit);
3001
20
  case Type::BlockPointer:
3002
20
    return CreateType(cast<BlockPointerType>(Ty), Unit);
3003
312
  case Type::Typedef:
3004
312
    return CreateType(cast<TypedefType>(Ty), Unit);
3005
1.23k
  case Type::Record:
3006
1.23k
    return CreateType(cast<RecordType>(Ty));
3007
124
  case Type::Enum:
3008
124
    return CreateEnumType(cast<EnumType>(Ty));
3009
1.24k
  case Type::FunctionProto:
3010
1.24k
  case Type::FunctionNoProto:
3011
1.24k
    return CreateType(cast<FunctionType>(Ty), Unit);
3012
1.24k
  case Type::ConstantArray:
3013
226
  case Type::VariableArray:
3014
226
  case Type::IncompleteArray:
3015
226
    return CreateType(cast<ArrayType>(Ty), Unit);
3016
226
3017
226
  case Type::LValueReference:
3018
166
    return CreateType(cast<LValueReferenceType>(Ty), Unit);
3019
226
  case Type::RValueReference:
3020
13
    return CreateType(cast<RValueReferenceType>(Ty), Unit);
3021
226
3022
226
  case Type::MemberPointer:
3023
42
    return CreateType(cast<MemberPointerType>(Ty), Unit);
3024
226
3025
226
  case Type::Atomic:
3026
1
    return CreateType(cast<AtomicType>(Ty), Unit);
3027
226
3028
226
  case Type::Pipe:
3029
0
    return CreateType(cast<PipeType>(Ty), Unit);
3030
226
3031
226
  case Type::TemplateSpecialization:
3032
5
    return CreateType(cast<TemplateSpecializationType>(Ty), Unit);
3033
226
3034
226
  case Type::Auto:
3035
0
  case Type::Attributed:
3036
0
  case Type::Adjusted:
3037
0
  case Type::Decayed:
3038
0
  case Type::DeducedTemplateSpecialization:
3039
0
  case Type::Elaborated:
3040
0
  case Type::Paren:
3041
0
  case Type::MacroQualified:
3042
0
  case Type::SubstTemplateTypeParm:
3043
0
  case Type::TypeOfExpr:
3044
0
  case Type::TypeOf:
3045
0
  case Type::Decltype:
3046
0
  case Type::UnaryTransform:
3047
0
  case Type::PackExpansion:
3048
0
    break;
3049
0
  }
3050
0
3051
0
  llvm_unreachable("type should have been unwrapped!");
3052
0
}
3053
3054
llvm::DICompositeType *CGDebugInfo::getOrCreateLimitedType(const RecordType *Ty,
3055
1.03k
                                                           llvm::DIFile *Unit) {
3056
1.03k
  QualType QTy(Ty, 0);
3057
1.03k
3058
1.03k
  auto *T = cast_or_null<llvm::DICompositeType>(getTypeOrNull(QTy));
3059
1.03k
3060
1.03k
  // We may have cached a forward decl when we could have created
3061
1.03k
  // a non-forward decl. Go ahead and create a non-forward decl
3062
1.03k
  // now.
3063
1.03k
  if (T && 
!T->isForwardDecl()87
)
3064
0
    return T;
3065
1.03k
3066
1.03k
  // Otherwise create the type.
3067
1.03k
  llvm::DICompositeType *Res = CreateLimitedType(Ty);
3068
1.03k
3069
1.03k
  // Propagate members from the declaration to the definition
3070
1.03k
  // CreateType(const RecordType*) will overwrite this with the members in the
3071
1.03k
  // correct order if the full type is needed.
3072
1.03k
  DBuilder.replaceArrays(Res, T ? 
T->getElements()87
:
llvm::DINodeArray()943
);
3073
1.03k
3074
1.03k
  // And update the type cache.
3075
1.03k
  TypeCache[QTy.getAsOpaquePtr()].reset(Res);
3076
1.03k
  return Res;
3077
1.03k
}
3078
3079
// TODO: Currently used for context chains when limiting debug info.
3080
1.03k
llvm::DICompositeType *CGDebugInfo::CreateLimitedType(const RecordType *Ty) {
3081
1.03k
  RecordDecl *RD = Ty->getDecl();
3082
1.03k
3083
1.03k
  // Get overall information about the record type for the debug info.
3084
1.03k
  llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation());
3085
1.03k
  unsigned Line = getLineNumber(RD->getLocation());
3086
1.03k
  StringRef RDName = getClassName(RD);
3087
1.03k
3088
1.03k
  llvm::DIScope *RDContext = getDeclContextDescriptor(RD);
3089
1.03k
3090
1.03k
  // If we ended up creating the type during the context chain construction,
3091
1.03k
  // just return that.
3092
1.03k
  auto *T = cast_or_null<llvm::DICompositeType>(
3093
1.03k
      getTypeOrNull(CGM.getContext().getRecordType(RD)));
3094
1.03k
  if (T && 
(92
!T->isForwardDecl()92
||
!RD->getDefinition()87
))
3095
5
    return T;
3096
1.02k
3097
1.02k
  // If this is just a forward or incomplete declaration, construct an
3098
1.02k
  // appropriately marked node and just return it.
3099
1.02k
  const RecordDecl *D = RD->getDefinition();
3100
1.02k
  if (!D || 
!D->isCompleteDefinition()980
)
3101
46
    return getOrCreateRecordFwdDecl(Ty, RDContext);
3102
979
3103
979
  uint64_t Size = CGM.getContext().getTypeSize(Ty);
3104
979
  auto Align = getDeclAlignIfRequired(D, CGM.getContext());
3105
979
3106
979
  SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
3107
979
3108
979
  // Explicitly record the calling convention for C++ records.
3109
979
  auto Flags = llvm::DINode::FlagZero;
3110
979
  if (auto CXXRD = dyn_cast<CXXRecordDecl>(RD)) {
3111
837
    if (CGM.getCXXABI().getRecordArgABI(CXXRD) == CGCXXABI::RAA_Indirect)
3112
151
      Flags |= llvm::DINode::FlagTypePassByReference;
3113
686
    else
3114
686
      Flags |= llvm::DINode::FlagTypePassByValue;
3115
837
3116
837
    // Record if a C++ record is non-trivial type.
3117
837
    if (!CXXRD->isTrivial())
3118
311
      Flags |= llvm::DINode::FlagNonTrivial;
3119
837
  }
3120
979
3121
979
  llvm::DICompositeType *RealDecl = DBuilder.createReplaceableCompositeType(
3122
979
      getTagForRecord(RD), RDName, RDContext, DefUnit, Line, 0, Size, Align,
3123
979
      Flags, Identifier);
3124
979
3125
979
  // Elements of composite types usually have back to the type, creating
3126
979
  // uniquing cycles.  Distinct nodes are more efficient.
3127
979
  switch (RealDecl->getTag()) {
3128
979
  default:
3129
0
    llvm_unreachable("invalid composite type tag");
3130
979
3131
979
  case llvm::dwarf::DW_TAG_array_type:
3132
0
  case llvm::dwarf::DW_TAG_enumeration_type:
3133
0
    // Array elements and most enumeration elements don't have back references,
3134
0
    // so they don't tend to be involved in uniquing cycles and there is some
3135
0
    // chance of merging them when linking together two modules.  Only make
3136
0
    // them distinct if they are ODR-uniqued.
3137
0
    if (Identifier.empty())
3138
0
      break;
3139
0
    LLVM_FALLTHROUGH;
3140
0
3141
979
  case llvm::dwarf::DW_TAG_structure_type:
3142
979
  case llvm::dwarf::DW_TAG_union_type:
3143
979
  case llvm::dwarf::DW_TAG_class_type:
3144
979
    // Immediately resolve to a distinct node.
3145
979
    RealDecl =
3146
979
        llvm::MDNode::replaceWithDistinct(llvm::TempDICompositeType(RealDecl));
3147
979
    break;
3148
979
  }
3149
979
3150
979
  RegionMap[Ty->getDecl()].reset(RealDecl);
3151
979
  TypeCache[QualType(Ty, 0).getAsOpaquePtr()].reset(RealDecl);
3152
979
3153
979
  if (const auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD))
3154
314
    DBuilder.replaceArrays(RealDecl, llvm::DINodeArray(),
3155
314
                           CollectCXXTemplateParams(TSpecial, DefUnit));
3156
979
  return RealDecl;
3157
979
}
3158
3159
void CGDebugInfo::CollectContainingType(const CXXRecordDecl *RD,
3160
842
                                        llvm::DICompositeType *RealDecl) {
3161
842
  // A class's primary base or the class itself contains the vtable.
3162
842
  llvm::DICompositeType *ContainingType = nullptr;
3163
842
  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
3164
842
  if (const CXXRecordDecl *PBase = RL.getPrimaryBase()) {
3165
33
    // Seek non-virtual primary base root.
3166
36
    while (1) {
3167
36
      const ASTRecordLayout &BRL = CGM.getContext().getASTRecordLayout(PBase);
3168
36
      const CXXRecordDecl *PBT = BRL.getPrimaryBase();
3169
36
      if (PBT && 
!BRL.isPrimaryBaseVirtual()4
)
3170
3
        PBase = PBT;
3171
33
      else
3172
33
        break;
3173
36
    }
3174
33
    ContainingType = cast<llvm::DICompositeType>(
3175
33
        getOrCreateType(QualType(PBase->getTypeForDecl(), 0),
3176
33
                        getOrCreateFile(RD->getLocation())));
3177
809
  } else if (RD->isDynamicClass())
3178
66
    ContainingType = RealDecl;
3179
842
3180
842
  DBuilder.replaceVTableHolder(RealDecl, ContainingType);
3181
842
}
3182
3183
llvm::DIType *CGDebugInfo::CreateMemberType(llvm::DIFile *Unit, QualType FType,
3184
195
                                            StringRef Name, uint64_t *Offset) {
3185
195
  llvm::DIType *FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
3186
195
  uint64_t FieldSize = CGM.getContext().getTypeSize(FType);
3187
195
  auto FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext());
3188
195
  llvm::DIType *Ty =
3189
195
      DBuilder.createMemberType(Unit, Name, Unit, 0, FieldSize, FieldAlign,
3190
195
                                *Offset, llvm::DINode::FlagZero, FieldTy);
3191
195
  *Offset += FieldSize;
3192
195
  return Ty;
3193
195
}
3194
3195
void CGDebugInfo::collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit,
3196
                                           StringRef &Name,
3197
                                           StringRef &LinkageName,
3198
                                           llvm::DIScope *&FDContext,
3199
                                           llvm::DINodeArray &TParamsArray,
3200
115k
                                           llvm::DINode::DIFlags &Flags) {
3201
115k
  const auto *FD = cast<FunctionDecl>(GD.getDecl());
3202
115k
  Name = getFunctionName(FD);
3203
115k
  // Use mangled name as linkage name for C/C++ functions.
3204
115k
  if (FD->hasPrototype()) {
3205
115k
    LinkageName = CGM.getMangledName(GD);
3206
115k
    Flags |= llvm::DINode::FlagPrototyped;
3207
115k
  }
3208
115k
  // No need to replicate the linkage name if it isn't different from the
3209
115k
  // subprogram name, no need to have it at all unless coverage is enabled or
3210
115k
  // debug is set to more than just line tables or extra debug info is needed.
3211
115k
  if (LinkageName == Name || 
(104k
!CGM.getCodeGenOpts().EmitGcovArcs104k
&&
3212
104k
                              
!CGM.getCodeGenOpts().EmitGcovNotes104k
&&
3213
104k
                              
!CGM.getCodeGenOpts().DebugInfoForProfiling104k
&&
3214
104k
                              
DebugKind <= codegenoptions::DebugLineTablesOnly104k
))
3215
114k
    LinkageName = StringRef();
3216
115k
3217
115k
  if (DebugKind >= codegenoptions::LimitedDebugInfo) {
3218
1.63k
    if (const NamespaceDecl *NSDecl =
3219
95
            dyn_cast_or_null<NamespaceDecl>(FD->getDeclContext()))
3220
95
      FDContext = getOrCreateNamespace(NSDecl);
3221
1.54k
    else if (const RecordDecl *RDecl =
3222
793
                 dyn_cast_or_null<RecordDecl>(FD->getDeclContext())) {
3223
793
      llvm::DIScope *Mod = getParentModuleOrNull(RDecl);
3224
793
      FDContext = getContextDescriptor(RDecl, Mod ? 
Mod14
:
TheCU779
);
3225
793
    }
3226
1.63k
    // Check if it is a noreturn-marked function
3227
1.63k
    if (FD->isNoReturn())
3228
0
      Flags |= llvm::DINode::FlagNoReturn;
3229
1.63k
    // Collect template parameters.
3230
1.63k
    TParamsArray = CollectFunctionTemplateParams(FD, Unit);
3231
1.63k
  }
3232
115k
}
3233
3234
void CGDebugInfo::collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit,
3235
                                      unsigned &LineNo, QualType &T,
3236
                                      StringRef &Name, StringRef &LinkageName,
3237
                                      llvm::MDTuple *&TemplateParameters,
3238
574
                                      llvm::DIScope *&VDContext) {
3239
574
  Unit = getOrCreateFile(VD->getLocation());
3240
574
  LineNo = getLineNumber(VD->getLocation());
3241
574
3242
574
  setLocation(VD->getLocation());
3243
574
3244
574
  T = VD->getType();
3245
574
  if (T->isIncompleteArrayType()) {
3246
0
    // CodeGen turns int[] into int[1] so we'll do the same here.
3247
0
    llvm::APInt ConstVal(32, 1);
3248
0
    QualType ET = CGM.getContext().getAsArrayType(T)->getElementType();
3249
0
3250
0
    T = CGM.getContext().getConstantArrayType(ET, ConstVal, ArrayType::Normal,
3251
0
                                              0);
3252
0
  }
3253
574
3254
574
  Name = VD->getName();
3255
574
  if (VD->getDeclContext() && !isa<FunctionDecl>(VD->getDeclContext()) &&
3256
574
      
!isa<ObjCMethodDecl>(VD->getDeclContext())512
)
3257
510
    LinkageName = CGM.getMangledName(VD);
3258
574
  if (LinkageName == Name)
3259
360
    LinkageName = StringRef();
3260
574
3261
574
  if (isa<VarTemplateSpecializationDecl>(VD)) {
3262
7
    llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VD, &*Unit);
3263
7
    TemplateParameters = parameterNodes.get();
3264
567
  } else {
3265
567
    TemplateParameters = nullptr;
3266
567
  }
3267
574
3268
574
  // Since we emit declarations (DW_AT_members) for static members, place the
3269
574
  // definition of those static members in the namespace they were declared in
3270
574
  // in the source code (the lexical decl context).
3271
574
  // FIXME: Generalize this for even non-member global variables where the
3272
574
  // declaration and definition may have different lexical decl contexts, once
3273
574
  // we have support for emitting declarations of (non-member) global variables.
3274
574
  const DeclContext *DC = VD->isStaticDataMember() ? 
VD->getLexicalDeclContext()44
3275
574
                                                   : 
VD->getDeclContext()530
;
3276
574
  // When a record type contains an in-line initialization of a static data
3277
574
  // member, and the record type is marked as __declspec(dllexport), an implicit
3278
574
  // definition of the member will be created in the record context.  DWARF
3279
574
  // doesn't seem to have a nice way to describe this in a form that consumers
3280
574
  // are likely to understand, so fake the "normal" situation of a definition
3281
574
  // outside the class by putting it in the global scope.
3282
574
  if (DC->isRecord())
3283
1
    DC = CGM.getContext().getTranslationUnitDecl();
3284
574
3285
574
  llvm::DIScope *Mod = getParentModuleOrNull(VD);
3286
574
  VDContext = getContextDescriptor(cast<Decl>(DC), Mod ? 
Mod18
:
TheCU556
);
3287
574
}
3288
3289
llvm::DISubprogram *CGDebugInfo::getFunctionFwdDeclOrStub(GlobalDecl GD,
3290
7
                                                          bool Stub) {
3291
7
  llvm::DINodeArray TParamsArray;
3292
7
  StringRef Name, LinkageName;
3293
7
  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3294
7
  llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
3295
7
  SourceLocation Loc = GD.getDecl()->getLocation();
3296
7
  llvm::DIFile *Unit = getOrCreateFile(Loc);
3297
7
  llvm::DIScope *DContext = Unit;
3298
7
  unsigned Line = getLineNumber(Loc);
3299
7
  collectFunctionDeclProps(GD, Unit, Name, LinkageName, DContext, TParamsArray,
3300
7
                           Flags);
3301
7
  auto *FD = dyn_cast<FunctionDecl>(GD.getDecl());
3302
7
3303
7
  // Build function type.
3304
7
  SmallVector<QualType, 16> ArgTypes;
3305
7
  if (FD)
3306
7
    for (const ParmVarDecl *Parm : FD->parameters())
3307
3
      ArgTypes.push_back(Parm->getType());
3308
7
  CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv();
3309
7
  QualType FnType = CGM.getContext().getFunctionType(
3310
7
      FD->getReturnType(), ArgTypes, FunctionProtoType::ExtProtoInfo(CC));
3311
7
  if (!FD->isExternallyVisible())
3312
0
    SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit;
3313
7
  if (CGM.getLangOpts().Optimize)
3314
0
    SPFlags |= llvm::DISubprogram::SPFlagOptimized;
3315
7
3316
7
  if (Stub) {
3317
3
    Flags |= getCallSiteRelatedAttrs();
3318
3
    SPFlags |= llvm::DISubprogram::SPFlagDefinition;
3319
3
    return DBuilder.createFunction(
3320
3
        DContext, Name, LinkageName, Unit, Line,
3321
3
        getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags,
3322
3
        TParamsArray.get(), getFunctionDeclaration(FD));
3323
3
  }
3324
4
3325
4
  llvm::DISubprogram *SP = DBuilder.createTempFunctionFwdDecl(
3326
4
      DContext, Name, LinkageName, Unit, Line,
3327
4
      getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags,
3328
4
      TParamsArray.get(), getFunctionDeclaration(FD));
3329
4
  const FunctionDecl *CanonDecl = FD->getCanonicalDecl();
3330
4
  FwdDeclReplaceMap.emplace_back(std::piecewise_construct,
3331
4
                                 std::make_tuple(CanonDecl),
3332
4
                                 std::make_tuple(SP));
3333
4
  return SP;
3334
4
}
3335
3336
4
llvm::DISubprogram *CGDebugInfo::getFunctionForwardDeclaration(GlobalDecl GD) {
3337
4
  return getFunctionFwdDeclOrStub(GD, /* Stub = */ false);
3338
4
}
3339
3340
3
llvm::DISubprogram *CGDebugInfo::getFunctionStub(GlobalDecl GD) {
3341
3
  return getFunctionFwdDeclOrStub(GD, /* Stub = */ true);
3342
3
}
3343
3344
llvm::DIGlobalVariable *
3345
4
CGDebugInfo::getGlobalVariableForwardDeclaration(const VarDecl *VD) {
3346
4
  QualType T;
3347
4
  StringRef Name, LinkageName;
3348
4
  SourceLocation Loc = VD->getLocation();
3349
4
  llvm::DIFile *Unit = getOrCreateFile(Loc);
3350
4
  llvm::DIScope *DContext = Unit;
3351
4
  unsigned Line = getLineNumber(Loc);
3352
4
  llvm::MDTuple *TemplateParameters = nullptr;
3353
4
3354
4
  collectVarDeclProps(VD, Unit, Line, T, Name, LinkageName, TemplateParameters,
3355
4
                      DContext);
3356
4
  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3357
4
  auto *GV = DBuilder.createTempGlobalVariableFwdDecl(
3358
4
      DContext, Name, LinkageName, Unit, Line, getOrCreateType(T, Unit),
3359
4
      !VD->isExternallyVisible(), nullptr, TemplateParameters, Align);
3360
4
  FwdDeclReplaceMap.emplace_back(
3361
4
      std::piecewise_construct,
3362
4
      std::make_tuple(cast<VarDecl>(VD->getCanonicalDecl())),
3363
4
      std::make_tuple(static_cast<llvm::Metadata *>(GV)));
3364
4
  return GV;
3365
4
}
3366
3367
40
llvm::DINode *CGDebugInfo::getDeclarationOrDefinition(const Decl *D) {
3368
40
  // We only need a declaration (not a definition) of the type - so use whatever
3369
40
  // we would otherwise do to get a type for a pointee. (forward declarations in
3370
40
  // limited debug info, full definitions (if the type definition is available)
3371
40
  // in unlimited debug info)
3372
40
  if (const auto *TD = dyn_cast<TypeDecl>(D))
3373
10
    return getOrCreateType(CGM.getContext().getTypeDeclType(TD),
3374
10
                           getOrCreateFile(TD->getLocation()));
3375
30
  auto I = DeclCache.find(D->getCanonicalDecl());
3376
30
3377
30
  if (I != DeclCache.end()) {
3378
7
    auto N = I->second;
3379
7
    if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(N))
3380
4
      return GVE->getVariable();
3381
3
    return dyn_cast_or_null<llvm::DINode>(N);
3382
3
  }
3383
23
3384
23
  // No definition for now. Emit a forward definition that might be
3385
23
  // merged with a potential upcoming definition.
3386
23
  if (const auto *FD = dyn_cast<FunctionDecl>(D))
3387
4
    return getFunctionForwardDeclaration(FD);
3388
19
  else if (const auto *VD = dyn_cast<VarDecl>(D))
3389
4
    return getGlobalVariableForwardDeclaration(VD);
3390
15
3391
15
  return nullptr;
3392
15
}
3393
3394
117k
llvm::DISubprogram *CGDebugInfo::getFunctionDeclaration(const Decl *D) {
3395
117k
  if (!D || 
DebugKind <= codegenoptions::DebugLineTablesOnly116k
)
3396
115k
    return nullptr;
3397
2.02k
3398
2.02k
  const auto *FD = dyn_cast<FunctionDecl>(D);
3399
2.02k
  if (!FD)
3400
389
    return nullptr;
3401
1.63k
3402
1.63k
  // Setup context.
3403
1.63k
  auto *S = getDeclContextDescriptor(D);
3404
1.63k
3405
1.63k
  auto MI = SPCache.find(FD->getCanonicalDecl());
3406
1.63k
  if (MI == SPCache.end()) {
3407
1.14k
    if (const auto *MD = dyn_cast<CXXMethodDecl>(FD->getCanonicalDecl())) {
3408
300
      return CreateCXXMemberFunction(MD, getOrCreateFile(MD->getLocation()),
3409
300
                                     cast<llvm::DICompositeType>(S));
3410
300
    }
3411
1.33k
  }
3412
1.33k
  if (MI != SPCache.end()) {
3413
493
    auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second);
3414
493
    if (SP && !SP->isDefinition())
3415
493
      return SP;
3416
842
  }
3417
842
3418
867
  
for (auto NextFD : FD->redecls())842
{
3419
867
    auto MI = SPCache.find(NextFD->getCanonicalDecl());
3420
867
    if (MI != SPCache.end()) {
3421
0
      auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second);
3422
0
      if (SP && !SP->isDefinition())
3423
0
        return SP;
3424
0
    }
3425
867
  }
3426
842
  return nullptr;
3427
842
}
3428
3429
// getOrCreateFunctionType - Construct type. If it is a c++ method, include
3430
// implicit parameter "this".
3431
llvm::DISubroutineType *CGDebugInfo::getOrCreateFunctionType(const Decl *D,
3432
                                                             QualType FnType,
3433
117k
                                                             llvm::DIFile *F) {
3434
117k
  if (!D || 
DebugKind <= codegenoptions::DebugLineTablesOnly116k
)
3435
115k
    // Create fake but valid subroutine type. Otherwise -verify would fail, and
3436
115k
    // subprogram DIE will miss DW_AT_decl_file and DW_AT_decl_line fields.
3437
115k
    return DBuilder.createSubroutineType(DBuilder.getOrCreateTypeArray(None));
3438
2.02k
3439
2.02k
  if (const auto *Method = dyn_cast<CXXMethodDecl>(D))
3440
793
    return getOrCreateMethodType(Method, F);
3441
1.23k
3442
1.23k
  const auto *FTy = FnType->getAs<FunctionType>();
3443
1.23k
  CallingConv CC = FTy ? FTy->getCallConv() : 
CallingConv::CC_C0
;
3444
1.23k
3445
1.23k
  if (const auto *OMethod = dyn_cast<ObjCMethodDecl>(D)) {
3446
136
    // Add "self" and "_cmd"
3447
136
    SmallVector<llvm::Metadata *, 16> Elts;
3448
136
3449
136
    // First element is always return type. For 'void' functions it is NULL.
3450
136
    QualType ResultTy = OMethod->getReturnType();
3451
136
3452
136
    // Replace the instancetype keyword with the actual type.
3453
136
    if (ResultTy == CGM.getContext().getObjCInstanceType())
3454
1
      ResultTy = CGM.getContext().getPointerType(
3455
1
          QualType(OMethod->getClassInterface()->getTypeForDecl(), 0));
3456
136
3457
136
    Elts.push_back(getOrCreateType(ResultTy, F));
3458
136
    // "self" pointer is always first argument.
3459
136
    QualType SelfDeclTy;
3460
136
    if (auto *SelfDecl = OMethod->getSelfDecl())
3461
116
      SelfDeclTy = SelfDecl->getType();
3462
20
    else if (auto *FPT = dyn_cast<FunctionProtoType>(FnType))
3463
20
      if (FPT->getNumParams() > 1)
3464
20
        SelfDeclTy = FPT->getParamType(0);
3465
136
    if (!SelfDeclTy.isNull())
3466
136
      Elts.push_back(
3467
136
          CreateSelfType(SelfDeclTy, getOrCreateType(SelfDeclTy, F)));
3468
136
    // "_cmd" pointer is always second argument.
3469
136
    Elts.push_back(DBuilder.createArtificialType(
3470
136
        getOrCreateType(CGM.getContext().getObjCSelType(), F)));
3471
136
    // Get rest of the arguments.
3472
136
    for (const auto *PI : OMethod->parameters())
3473
65
      Elts.push_back(getOrCreateType(PI->getType(), F));
3474
136
    // Variadic methods need a special marker at the end of the type list.
3475
136
    if (OMethod->isVariadic())
3476
2
      Elts.push_back(DBuilder.createUnspecifiedParameter());
3477
136
3478
136
    llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts);
3479
136
    return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
3480
136
                                         getDwarfCC(CC));
3481
136
  }
3482
1.09k
3483
1.09k
  // Handle variadic function types; they need an additional
3484
1.09k
  // unspecified parameter.
3485
1.09k
  if (const auto *FD = dyn_cast<FunctionDecl>(D))
3486
842
    if (FD->isVariadic()) {
3487
2
      SmallVector<llvm::Metadata *, 16> EltTys;
3488
2
      EltTys.push_back(getOrCreateType(FD->getReturnType(), F));
3489
2
      if (const auto *FPT = dyn_cast<FunctionProtoType>(FnType))
3490
2
        for (QualType ParamType : FPT->param_types())
3491
2
          EltTys.push_back(getOrCreateType(ParamType, F));
3492
2
      EltTys.push_back(DBuilder.createUnspecifiedParameter());
3493
2
      llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys);
3494
2
      return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero,
3495
2
                                           getDwarfCC(CC));
3496
2
    }
3497
1.09k
3498
1.09k
  return cast<llvm::DISubroutineType>(getOrCreateType(FnType, F));
3499
1.09k
}
3500
3501
void CGDebugInfo::EmitFunctionStart(GlobalDecl GD, SourceLocation Loc,
3502
                                    SourceLocation ScopeLoc, QualType FnType,
3503
                                    llvm::Function *Fn, bool CurFuncIsThunk,
3504
117k
                                    CGBuilderTy &Builder) {
3505
117k
3506
117k
  StringRef Name;
3507
117k
  StringRef LinkageName;
3508
117k
3509
117k
  FnBeginRegionCount.push_back(LexicalBlockStack.size());
3510
117k
3511
117k
  const Decl *D = GD.getDecl();
3512
117k
  bool HasDecl = (D != nullptr);
3513
117k
3514
117k
  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3515
117k
  llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
3516
117k
  llvm::DIFile *Unit = getOrCreateFile(Loc);
3517
117k
  llvm::DIScope *FDContext = Unit;
3518
117k
  llvm::DINodeArray TParamsArray;
3519
117k
  if (!HasDecl) {
3520
602
    // Use llvm function name.
3521
602
    LinkageName = Fn->getName();
3522
116k
  } else if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
3523
115k
    // If there is a subprogram for this function available then use it.
3524
115k
    auto FI = SPCache.find(FD->getCanonicalDecl());
3525
115k
    if (FI != SPCache.end()) {
3526
435
      auto *SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second);
3527
435
      if (SP && SP->isDefinition()) {
3528
0
        LexicalBlockStack.emplace_back(SP);
3529
0
        RegionMap[D].reset(SP);
3530
0
        return;
3531
0
      }
3532
115k
    }
3533
115k
    collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext,
3534
115k
                             TParamsArray, Flags);
3535
115k
  } else 
if (const auto *896
OMD896
= dyn_cast<ObjCMethodDecl>(D)) {
3536
116
    Name = getObjCMethodName(OMD);
3537
116
    Flags |= llvm::DINode::FlagPrototyped;
3538
780
  } else if (isa<VarDecl>(D) &&
3539
780
             
GD.getDynamicInitKind() != DynamicInitKind::NoStub248
) {
3540
235
    // This is a global initializer or atexit destructor for a global variable.
3541
235
    Name = getDynamicInitializerName(cast<VarDecl>(D), GD.getDynamicInitKind(),
3542
235
                                     Fn);
3543
545
  } else {
3544
545
    // Use llvm function name.
3545
545
    Name = Fn->getName();
3546
545
    Flags |= llvm::DINode::FlagPrototyped;
3547
545
  }
3548
117k
  if (Name.startswith("\01"))
3549
0
    Name = Name.substr(1);
3550
117k
3551
117k
  if (!HasDecl || 
D->isImplicit()116k
||
D->hasAttr<ArtificialAttr>()114k
) {
3552
2.53k
    Flags |= llvm::DINode::FlagArtificial;
3553
2.53k
    // Artificial functions should not silently reuse CurLoc.
3554
2.53k
    CurLoc = SourceLocation();
3555
2.53k
  }
3556
117k
3557
117k
  if (CurFuncIsThunk)
3558
374
    Flags |= llvm::DINode::FlagThunk;
3559
117k
3560
117k
  if (Fn->hasLocalLinkage())
3561
8.85k
    SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit;
3562
117k
  if (CGM.getLangOpts().Optimize)
3563
114k
    SPFlags |= llvm::DISubprogram::SPFlagOptimized;
3564
117k
3565
117k
  llvm::DINode::DIFlags FlagsForDef = Flags | getCallSiteRelatedAttrs();
3566
117k
  llvm::DISubprogram::DISPFlags SPFlagsForDef =
3567
117k
      SPFlags | llvm::DISubprogram::SPFlagDefinition;
3568
117k
3569
117k
  unsigned LineNo = getLineNumber(Loc);
3570
117k
  unsigned ScopeLine = getLineNumber(ScopeLoc);
3571
117k
3572
117k
  // FIXME: The function declaration we're constructing here is mostly reusing
3573
117k
  // declarations from CXXMethodDecl and not constructing new ones for arbitrary
3574
117k
  // FunctionDecls. When/if we fix this we can have FDContext be TheCU/null for
3575
117k
  // all subprograms instead of the actual context since subprogram definitions
3576
117k
  // are emitted as CU level entities by the backend.
3577
117k
  llvm::DISubprogram *SP = DBuilder.createFunction(
3578
117k
      FDContext, Name, LinkageName, Unit, LineNo,
3579
117k
      getOrCreateFunctionType(D, FnType, Unit), ScopeLine, FlagsForDef,
3580
117k
      SPFlagsForDef, TParamsArray.get(), getFunctionDeclaration(D));
3581
117k
  Fn->setSubprogram(SP);
3582
117k
  // We might get here with a VarDecl in the case we're generating
3583
117k
  // code for the initialization of globals. Do not record these decls
3584
117k
  // as they will overwrite the actual VarDecl Decl in the cache.
3585
117k
  if (HasDecl && 
isa<FunctionDecl>(D)116k
)
3586
115k
    DeclCache[D->getCanonicalDecl()].reset(SP);
3587
117k
3588
117k
  // We use the SPDefCache only in the case when the debug entry values option
3589
117k
  // is set, in order to speed up parameters modification analysis.
3590
117k
  //
3591
117k
  // FIXME: Use AbstractCallee here to support ObjCMethodDecl.
3592
117k
  if (CGM.getCodeGenOpts().EnableDebugEntryValues && 
HasDecl9
)
3593
9
    if (auto *FD = dyn_cast<FunctionDecl>(D))
3594
9
      if (FD->hasBody() && 
!FD->param_empty()8
)
3595
2
        SPDefCache[FD].reset(SP);
3596
117k
3597
117k
  if (CGM.getCodeGenOpts().DwarfVersion >= 5) {
3598
22
    // Starting with DWARF V5 method declarations are emitted as children of
3599
22
    // the interface type.
3600
22
    if (const auto *OMD = dyn_cast_or_null<ObjCMethodDecl>(D)) {
3601
4
      const ObjCInterfaceDecl *ID = OMD->getClassInterface();
3602
4
      QualType QTy(ID->getTypeForDecl(), 0);
3603
4
      auto It = TypeCache.find(QTy.getAsOpaquePtr());
3604
4
      if (It != TypeCache.end()) {
3605
4
        llvm::DICompositeType *InterfaceDecl =
3606
4
            cast<llvm::DICompositeType>(It->second);
3607
4
        llvm::DISubprogram *FD = DBuilder.createFunction(
3608
4
            InterfaceDecl, Name, LinkageName, Unit, LineNo,
3609
4
            getOrCreateFunctionType(D, FnType, Unit), ScopeLine, Flags, SPFlags,
3610
4
            TParamsArray.get());
3611
4
        DBuilder.finalizeSubprogram(FD);
3612
4
        ObjCMethodCache[ID].push_back(FD);
3613
4
      }
3614
4
    }
3615
22
  }
3616
117k
3617
117k
  // Push the function onto the lexical block stack.
3618
117k
  LexicalBlockStack.emplace_back(SP);
3619
117k
3620
117k
  if (HasDecl)
3621
116k
    RegionMap[D].reset(SP);
3622
117k
}
3623
3624
void CGDebugInfo::EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc,
3625
33
                                   QualType FnType, llvm::Function *Fn) {
3626
33
  StringRef Name;
3627
33
  StringRef LinkageName;
3628
33
3629
33
  const Decl *D = GD.getDecl();
3630
33
  if (!D)
3631
0
    return;
3632
33
3633
33
  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3634
33
  llvm::DIFile *Unit = getOrCreateFile(Loc);
3635
33
  bool IsDeclForCallSite = Fn ? 
true2
:
false31
;
3636
33
  llvm::DIScope *FDContext =
3637
33
      IsDeclForCallSite ? 
Unit2
:
getDeclContextDescriptor(D)31
;
3638
33
  llvm::DINodeArray TParamsArray;
3639
33
  if (isa<FunctionDecl>(D)) {
3640
13
    // If there is a DISubprogram for this function available then use it.
3641
13
    collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext,
3642
13
                             TParamsArray, Flags);
3643
20
  } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) {
3644
20
    Name = getObjCMethodName(OMD);
3645
20
    Flags |= llvm::DINode::FlagPrototyped;
3646
20
  } else {
3647
0
    llvm_unreachable("not a function or ObjC method");
3648
0
  }
3649
33
  if (!Name.empty() && Name[0] == '\01')
3650
0
    Name = Name.substr(1);
3651
33
3652
33
  if (D->isImplicit()) {
3653
0
    Flags |= llvm::DINode::FlagArtificial;
3654
0
    // Artificial functions without a location should not silently reuse CurLoc.
3655
0
    if (Loc.isInvalid())
3656
0
      CurLoc = SourceLocation();
3657
0
  }
3658
33
  unsigned LineNo = getLineNumber(Loc);
3659
33
  unsigned ScopeLine = 0;
3660
33
  llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero;
3661
33
  if (CGM.getLangOpts().Optimize)
3662
2
    SPFlags |= llvm::DISubprogram::SPFlagOptimized;
3663
33
3664
33
  llvm::DISubprogram *SP = DBuilder.createFunction(
3665
33
      FDContext, Name, LinkageName, Unit, LineNo,
3666
33
      getOrCreateFunctionType(D, FnType, Unit), ScopeLine, Flags, SPFlags,
3667
33
      TParamsArray.get(), getFunctionDeclaration(D));
3668
33
3669
33
  if (IsDeclForCallSite)
3670
2
    Fn->setSubprogram(SP);
3671
33
3672
33
  DBuilder.retainType(SP);
3673
33
}
3674
3675
void CGDebugInfo::EmitFuncDeclForCallSite(llvm::CallBase *CallOrInvoke,
3676
                                          QualType CalleeType,
3677
203k
                                          const FunctionDecl *CalleeDecl) {
3678
203k
  auto &CGOpts = CGM.getCodeGenOpts();
3679
203k
  if (!CGOpts.EnableDebugEntryValues || 
!CGM.getLangOpts().Optimize2
||
3680
203k
      
!CallOrInvoke2
||
3681
203k
      
CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo2
)
3682
203k
    return;
3683
2
3684
2
  auto *Func = CallOrInvoke->getCalledFunction();
3685
2
  if (!Func)
3686
0
    return;
3687
2
3688
2
  // If there is no DISubprogram attached to the function being called,
3689
2
  // create the one describing the function in order to have complete
3690
2
  // call site debug info.
3691
2
  if (Func->getSubprogram())
3692
0
    return;
3693
2
3694
2
  if (!CalleeDecl->isStatic() && !CalleeDecl->isInlined())
3695
2
    EmitFunctionDecl(CalleeDecl, CalleeDecl->getLocation(), CalleeType, Func);
3696
2
}
3697
3698
3
void CGDebugInfo::EmitInlineFunctionStart(CGBuilderTy &Builder, GlobalDecl GD) {
3699
3
  const auto *FD = cast<FunctionDecl>(GD.getDecl());
3700
3
  // If there is a subprogram for this function available then use it.
3701
3
  auto FI = SPCache.find(FD->getCanonicalDecl());
3702
3
  llvm::DISubprogram *SP = nullptr;
3703
3
  if (FI != SPCache.end())
3704
1
    SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second);
3705
3
  if (!SP || 
!SP->isDefinition()1
)
3706
3
    SP = getFunctionStub(GD);
3707
3
  FnBeginRegionCount.push_back(LexicalBlockStack.size());
3708
3
  LexicalBlockStack.emplace_back(SP);
3709
3
  setInlinedAt(Builder.getCurrentDebugLocation());
3710
3
  EmitLocation(Builder, FD->getLocation());
3711
3
}
3712
3713
3
void CGDebugInfo::EmitInlineFunctionEnd(CGBuilderTy &Builder) {
3714
3
  assert(CurInlinedAt && "unbalanced inline scope stack");
3715
3
  EmitFunctionEnd(Builder, nullptr);
3716
3
  setInlinedAt(llvm::DebugLoc(CurInlinedAt).getInlinedAt());
3717
3
}
3718
3719
6.06M
void CGDebugInfo::EmitLocation(CGBuilderTy &Builder, SourceLocation Loc) {
3720
6.06M
  // Update our current location
3721
6.06M
  setLocation(Loc);
3722
6.06M
3723
6.06M
  if (CurLoc.isInvalid() || 
CurLoc.isMacroID()6.05M
||
LexicalBlockStack.empty()6.05M
)
3724
1.58k
    return;
3725
6.05M
3726
6.05M
  llvm::MDNode *Scope = LexicalBlockStack.back();
3727
6.05M
  Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(
3728
6.05M
      getLineNumber(CurLoc), getColumnNumber(CurLoc), Scope, CurInlinedAt));
3729
6.05M
}
3730
3731
800
void CGDebugInfo::CreateLexicalBlock(SourceLocation Loc) {
3732
800
  llvm::MDNode *Back = nullptr;
3733
800
  if (!LexicalBlockStack.empty())
3734
800
    Back = LexicalBlockStack.back().get();
3735
800
  LexicalBlockStack.emplace_back(DBuilder.createLexicalBlock(
3736
800
      cast<llvm::DIScope>(Back), getOrCreateFile(CurLoc), getLineNumber(CurLoc),
3737
800
      getColumnNumber(CurLoc)));
3738
800
}
3739
3740
void CGDebugInfo::AppendAddressSpaceXDeref(
3741
4.80k
    unsigned AddressSpace, SmallVectorImpl<int64_t> &Expr) const {
3742
4.80k
  Optional<unsigned> DWARFAddressSpace =
3743
4.80k
      CGM.getTarget().getDWARFAddressSpace(AddressSpace);
3744
4.80k
  if (!DWARFAddressSpace)
3745
4.71k
    return;
3746
97
3747
97
  Expr.push_back(llvm::dwarf::DW_OP_constu);
3748
97
  Expr.push_back(DWARFAddressSpace.getValue());
3749
97
  Expr.push_back(llvm::dwarf::DW_OP_swap);
3750
97
  Expr.push_back(llvm::dwarf::DW_OP_xderef);
3751
97
}
3752
3753
void CGDebugInfo::EmitLexicalBlockStart(CGBuilderTy &Builder,
3754
239k
                                        SourceLocation Loc) {
3755
239k
  // Set our current location.
3756
239k
  setLocation(Loc);
3757
239k
3758
239k
  // Emit a line table change for the current location inside the new scope.
3759
239k
  Builder.SetCurrentDebugLocation(
3760
239k
      llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc),
3761
239k
                          LexicalBlockStack.back(), CurInlinedAt));
3762
239k
3763
239k
  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
3764
239k
    return;
3765
800
3766
800
  // Create a new lexical block and push it on the stack.
3767
800
  CreateLexicalBlock(Loc);
3768
800
}
3769
3770
void CGDebugInfo::EmitLexicalBlockEnd(CGBuilderTy &Builder,
3771
239k
                                      SourceLocation Loc) {
3772
239k
  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3773
239k
3774
239k
  // Provide an entry in the line table for the end of the block.
3775
239k
  EmitLocation(Builder, Loc);
3776
239k
3777
239k
  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
3778
239k
    return;
3779
800
3780
800
  LexicalBlockStack.pop_back();
3781
800
}
3782
3783
117k
void CGDebugInfo::EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn) {
3784
117k
  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3785
117k
  unsigned RCount = FnBeginRegionCount.back();
3786
117k
  assert(RCount <= LexicalBlockStack.size() && "Region stack mismatch");
3787
117k
3788
117k
  // Pop all regions for this function.
3789
234k
  while (LexicalBlockStack.size() != RCount) {
3790
117k
    // Provide an entry in the line table for the end of the block.
3791
117k
    EmitLocation(Builder, CurLoc);
3792
117k
    LexicalBlockStack.pop_back();
3793
117k
  }
3794
117k
  FnBeginRegionCount.pop_back();
3795
117k
3796
117k
  if (Fn && 
Fn->getSubprogram()117k
)
3797
117k
    DBuilder.finalizeSubprogram(Fn->getSubprogram());
3798
117k
}
3799
3800
CGDebugInfo::BlockByRefType
3801
CGDebugInfo::EmitTypeForVarWithBlocksAttr(const VarDecl *VD,
3802
20
                                          uint64_t *XOffset) {
3803
20
  SmallVector<llvm::Metadata *, 5> EltTys;
3804
20
  QualType FType;
3805
20
  uint64_t FieldSize, FieldOffset;
3806
20
  uint32_t FieldAlign;
3807
20
3808
20
  llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
3809
20
  QualType Type = VD->getType();
3810
20
3811
20
  FieldOffset = 0;
3812
20
  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
3813
20
  EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
3814
20
  EltTys.push_back(CreateMemberType(Unit, FType, "__forwarding", &FieldOffset));
3815
20
  FType = CGM.getContext().IntTy;
3816
20
  EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
3817
20
  EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset));
3818
20
3819
20
  bool HasCopyAndDispose = CGM.getContext().BlockRequiresCopying(Type, VD);
3820
20
  if (HasCopyAndDispose) {
3821
0
    FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
3822
0
    EltTys.push_back(
3823
0
        CreateMemberType(Unit, FType, "__copy_helper", &FieldOffset));
3824
0
    EltTys.push_back(
3825
0
        CreateMemberType(Unit, FType, "__destroy_helper", &FieldOffset));
3826
0
  }
3827
20
  bool HasByrefExtendedLayout;
3828
20
  Qualifiers::ObjCLifetime Lifetime;
3829
20
  if (CGM.getContext().getByrefLifetime(Type, Lifetime,
3830
20
                                        HasByrefExtendedLayout) &&
3831
20
      
HasByrefExtendedLayout9
) {
3832
3
    FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
3833
3
    EltTys.push_back(
3834
3
        CreateMemberType(Unit, FType, "__byref_variable_layout", &FieldOffset));
3835
3
  }
3836
20
3837
20
  CharUnits Align = CGM.getContext().getDeclAlign(VD);
3838
20
  if (Align > CGM.getContext().toCharUnitsFromBits(
3839
20
                  CGM.getTarget().getPointerAlign(0))) {
3840
0
    CharUnits FieldOffsetInBytes =
3841
0
        CGM.getContext().toCharUnitsFromBits(FieldOffset);
3842
0
    CharUnits AlignedOffsetInBytes = FieldOffsetInBytes.alignTo(Align);
3843
0
    CharUnits NumPaddingBytes = AlignedOffsetInBytes - FieldOffsetInBytes;
3844
0
3845
0
    if (NumPaddingBytes.isPositive()) {
3846
0
      llvm::APInt pad(32, NumPaddingBytes.getQuantity());
3847
0
      FType = CGM.getContext().getConstantArrayType(CGM.getContext().CharTy,
3848
0
                                                    pad, ArrayType::Normal, 0);
3849
0
      EltTys.push_back(CreateMemberType(Unit, FType, "", &FieldOffset));
3850
0
    }
3851
0
  }
3852
20
3853
20
  FType = Type;
3854
20
  llvm::DIType *WrappedTy = getOrCreateType(FType, Unit);
3855
20
  FieldSize = CGM.getContext().getTypeSize(FType);
3856
20
  FieldAlign = CGM.getContext().toBits(Align);
3857
20
3858
20
  *XOffset = FieldOffset;
3859
20
  llvm::DIType *FieldTy = DBuilder.createMemberType(
3860
20
      Unit, VD->getName(), Unit, 0, FieldSize, FieldAlign, FieldOffset,
3861
20
      llvm::DINode::FlagZero, WrappedTy);
3862
20
  EltTys.push_back(FieldTy);
3863
20
  FieldOffset += FieldSize;
3864
20
3865
20
  llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
3866
20
  return {DBuilder.createStructType(Unit, "", Unit, 0, FieldOffset, 0,
3867
20
                                    llvm::DINode::FlagZero, nullptr, Elements),
3868
20
          WrappedTy};
3869
20
}
3870
3871
llvm::DILocalVariable *CGDebugInfo::EmitDeclare(const VarDecl *VD,
3872
                                                llvm::Value *Storage,
3873
                                                llvm::Optional<unsigned> ArgNo,
3874
                                                CGBuilderTy &Builder,
3875
4.24k
                                                const bool UsePointerValue) {
3876
4.24k
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
3877
4.24k
  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
3878
4.24k
  if (VD->hasAttr<NoDebugAttr>())
3879
2
    return nullptr;
3880
4.24k
3881
4.24k
  bool Unwritten =
3882
4.24k
      VD->isImplicit() || 
(2.16k
isa<Decl>(VD->getDeclContext())2.16k
&&
3883
2.16k
                           cast<Decl>(VD->getDeclContext())->isImplicit());
3884
4.24k
  llvm::DIFile *Unit = nullptr;
3885
4.24k
  if (!Unwritten)
3886
2.13k
    Unit = getOrCreateFile(VD->getLocation());
3887
4.24k
  llvm::DIType *Ty;
3888
4.24k
  uint64_t XOffset = 0;
3889
4.24k
  if (VD->hasAttr<BlocksAttr>())
3890
6
    Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType;
3891
4.23k
  else
3892
4.23k
    Ty = getOrCreateType(VD->getType(), Unit);
3893
4.24k
3894
4.24k
  // If there is no debug info for this type then do not emit debug info
3895
4.24k
  // for this variable.
3896
4.24k
  if (!Ty)
3897
0
    return nullptr;
3898
4.24k
3899
4.24k
  // Get location information.
3900
4.24k
  unsigned Line = 0;
3901
4.24k
  unsigned Column = 0;
3902
4.24k
  if (!Unwritten) {
3903
2.13k
    Line = getLineNumber(VD->getLocation());
3904
2.13k
    Column = getColumnNumber(VD->getLocation());
3905
2.13k
  }
3906
4.24k
  SmallVector<int64_t, 13> Expr;
3907
4.24k
  llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero;
3908
4.24k
  if (VD->isImplicit())
3909
2.07k
    Flags |= llvm::DINode::FlagArtificial;
3910
4.24k
3911
4.24k
  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
3912
4.24k
3913
4.24k
  unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(VD->getType());
3914
4.24k
  AppendAddressSpaceXDeref(AddressSpace, Expr);
3915
4.24k
3916
4.24k
  // If this is implicit parameter of CXXThis or ObjCSelf kind, then give it an
3917
4.24k
  // object pointer flag.
3918
4.24k
  if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) {
3919
1.44k
    if (IPD->getParameterKind() == ImplicitParamDecl::CXXThis ||
3920
1.44k
        
IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf650
)
3921
906
      Flags |= llvm::DINode::FlagObjectPointer;
3922
1.44k
  }
3923
4.24k
3924
4.24k
  // Note: Older versions of clang used to emit byval references with an extra
3925
4.24k
  // DW_OP_deref, because they referenced the IR arg directly instead of
3926
4.24k
  // referencing an alloca. Newer versions of LLVM don't treat allocas
3927
4.24k
  // differently from other function arguments when used in a dbg.declare.
3928
4.24k
  auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
3929
4.24k
  StringRef Name = VD->getName();
3930
4.24k
  if (!Name.empty()) {
3931
3.75k
    if (VD->hasAttr<BlocksAttr>()) {
3932
6
      // Here, we need an offset *into* the alloca.
3933
6
      CharUnits offset = CharUnits::fromQuantity(32);
3934
6
      Expr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3935
6
      // offset of __forwarding field
3936
6
      offset = CGM.getContext().toCharUnitsFromBits(
3937
6
          CGM.getTarget().getPointerWidth(0));
3938
6
      Expr.push_back(offset.getQuantity());
3939
6
      Expr.push_back(llvm::dwarf::DW_OP_deref);
3940
6
      Expr.push_back(llvm::dwarf::DW_OP_plus_uconst);
3941
6
      // offset of x field
3942
6
      offset = CGM.getContext().toCharUnitsFromBits(XOffset);
3943
6
      Expr.push_back(offset.getQuantity());
3944
6
    }
3945
3.75k
  } else 
if (const auto *484
RT484
= dyn_cast<RecordType>(VD->getType())) {
3946
14
    // If VD is an anonymous union then Storage represents value for
3947
14
    // all union fields.
3948
14
    const RecordDecl *RD = RT->getDecl();
3949
14
    if (RD->isUnion() && 
RD->isAnonymousStructOrUnion()1
) {
3950
1
      // GDB has trouble finding local variables in anonymous unions, so we emit
3951
1
      // artificial local variables for each of the members.
3952
1
      //
3953
1
      // FIXME: Remove this code as soon as GDB supports this.
3954
1
      // The debug info verifier in LLVM operates based on the assumption that a
3955
1
      // variable has the same size as its storage and we had to disable the
3956
1
      // check for artificial variables.
3957
2
      for (const auto *Field : RD->fields()) {
3958
2
        llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
3959
2
        StringRef FieldName = Field->getName();
3960
2
3961
2
        // Ignore unnamed fields. Do not ignore unnamed records.
3962
2
        if (FieldName.empty() && 
!isa<RecordType>(Field->getType())0
)
3963
0
          continue;
3964
2
3965
2
        // Use VarDecl's Tag, Scope and Line number.
3966
2
        auto FieldAlign = getDeclAlignIfRequired(Field, CGM.getContext());
3967
2
        auto *D = DBuilder.createAutoVariable(
3968
2
            Scope, FieldName, Unit, Line, FieldTy, CGM.getLangOpts().Optimize,
3969
2
            Flags | llvm::DINode::FlagArtificial, FieldAlign);
3970
2
3971
2
        // Insert an llvm.dbg.declare into the current block.
3972
2
        DBuilder.insertDeclare(
3973
2
            Storage, D, DBuilder.createExpression(Expr),
3974
2
            llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt),
3975
2
            Builder.GetInsertBlock());
3976
2
      }
3977
1
    }
3978
14
  }
3979
4.24k
3980
4.24k
  // Clang stores the sret pointer provided by the caller in a static alloca.
3981
4.24k
  // Use DW_OP_deref to tell the debugger to load the pointer and treat it as
3982
4.24k
  // the address of the variable.
3983
4.24k
  if (UsePointerValue) {
3984
1
    assert(std::find(Expr.begin(), Expr.end(), llvm::dwarf::DW_OP_deref) ==
3985
1
               Expr.end() &&
3986
1
           "Debug info already contains DW_OP_deref.");
3987
1
    Expr.push_back(llvm::dwarf::DW_OP_deref);
3988
1
  }
3989
4.24k
3990
4.24k
  // Create the descriptor for the variable.
3991
4.24k
  auto *D = ArgNo ? DBuilder.createParameterVariable(
3992
2.65k
                        Scope, Name, *ArgNo, Unit, Line, Ty,
3993
2.65k
                        CGM.getLangOpts().Optimize, Flags)
3994
4.24k
                  : DBuilder.createAutoVariable(Scope, Name, Unit, Line, Ty,
3995
1.58k
                                                CGM.getLangOpts().Optimize,
3996
1.58k
                                                Flags, Align);
3997
4.24k
3998
4.24k
  // Insert an llvm.dbg.declare into the current block.
3999
4.24k
  DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(Expr),
4000
4.24k
                         llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt),
4001
4.24k
                         Builder.GetInsertBlock());
4002
4.24k
4003
4.24k
  if (CGM.getCodeGenOpts().EnableDebugEntryValues && 
ArgNo16
) {
4004
13
    if (auto *PD = dyn_cast<ParmVarDecl>(VD))
4005
5
      ParamCache[PD].reset(D);
4006
13
  }
4007
4.24k
4008
4.24k
  return D;
4009
4.24k
}
4010
4011
llvm::DILocalVariable *
4012
CGDebugInfo::EmitDeclareOfAutoVariable(const VarDecl *VD, llvm::Value *Storage,
4013
                                       CGBuilderTy &Builder,
4014
1.58k
                                       const bool UsePointerValue) {
4015
1.58k
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4016
1.58k
  return EmitDeclare(VD, Storage, llvm::None, Builder, UsePointerValue);
4017
1.58k
}
4018
4019
7
void CGDebugInfo::EmitLabel(const LabelDecl *D, CGBuilderTy &Builder) {
4020
7
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4021
7
  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
4022
7
4023
7
  if (D->hasAttr<NoDebugAttr>())
4024
0
    return;
4025
7
4026
7
  auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
4027
7
  llvm::DIFile *Unit = getOrCreateFile(D->getLocation());
4028
7
4029
7
  // Get location information.
4030
7
  unsigned Line = getLineNumber(D->getLocation());
4031
7
  unsigned Column = getColumnNumber(D->getLocation());
4032
7
4033
7
  StringRef Name = D->getName();
4034
7
4035
7
  // Create the descriptor for the label.
4036
7
  auto *L =
4037
7
      DBuilder.createLabel(Scope, Name, Unit, Line, CGM.getLangOpts().Optimize);
4038
7
4039
7
  // Insert an llvm.dbg.label into the current block.
4040
7
  DBuilder.insertLabel(L,
4041
7
                       llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt),
4042
7
                       Builder.GetInsertBlock());
4043
7
}
4044
4045
llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy,
4046
139
                                          llvm::DIType *Ty) {
4047
139
  llvm::DIType *CachedTy = getTypeOrNull(QualTy);
4048
139
  if (CachedTy)
4049
139
    Ty = CachedTy;
4050
139
  return DBuilder.createObjectPointerType(Ty);
4051
139
}
4052
4053
void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable(
4054
    const VarDecl *VD, llvm::Value *Storage, CGBuilderTy &Builder,
4055
25
    const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint) {
4056
25
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4057
25
  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
4058
25
4059
25
  if (Builder.GetInsertBlock() == nullptr)
4060
0
    return;
4061
25
  if (VD->hasAttr<NoDebugAttr>())
4062
1
    return;
4063
24
4064
24
  bool isByRef = VD->hasAttr<BlocksAttr>();
4065
24
4066
24
  uint64_t XOffset = 0;
4067
24
  llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
4068
24
  llvm::DIType *Ty;
4069
24
  if (isByRef)
4070
7
    Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType;
4071
17
  else
4072
17
    Ty = getOrCreateType(VD->getType(), Unit);
4073
24
4074
24
  // Self is passed along as an implicit non-arg variable in a
4075
24
  // block. Mark it as the object pointer.
4076
24
  if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD))
4077
3
    if (IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf)
4078
3
      Ty = CreateSelfType(VD->getType(), Ty);
4079
24
4080
24
  // Get location information.
4081
24
  unsigned Line = getLineNumber(VD->getLocation());
4082
24
  unsigned Column = getColumnNumber(VD->getLocation());
4083
24
4084
24
  const llvm::DataLayout &target = CGM.getDataLayout();
4085
24
4086
24
  CharUnits offset = CharUnits::fromQuantity(
4087
24
      target.getStructLayout(blockInfo.StructureType)
4088
24
          ->getElementOffset(blockInfo.getCapture(VD).getIndex()));
4089
24
4090
24
  SmallVector<int64_t, 9> addr;
4091
24
  addr.push_back(llvm::dwarf::DW_OP_deref);
4092
24
  addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
4093
24
  addr.push_back(offset.getQuantity());
4094
24
  if (isByRef) {
4095
7
    addr.push_back(llvm::dwarf::DW_OP_deref);
4096
7
    addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
4097
7
    // offset of __forwarding field
4098
7
    offset =
4099
7
        CGM.getContext().toCharUnitsFromBits(target.getPointerSizeInBits(0));
4100
7
    addr.push_back(offset.getQuantity());
4101
7
    addr.push_back(llvm::dwarf::DW_OP_deref);
4102
7
    addr.push_back(llvm::dwarf::DW_OP_plus_uconst);
4103
7
    // offset of x field
4104
7
    offset = CGM.getContext().toCharUnitsFromBits(XOffset);
4105
7
    addr.push_back(offset.getQuantity());
4106
7
  }
4107
24
4108
24
  // Create the descriptor for the variable.
4109
24
  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
4110
24
  auto *D = DBuilder.createAutoVariable(
4111
24
      cast<llvm::DILocalScope>(LexicalBlockStack.back()), VD->getName(), Unit,
4112
24
      Line, Ty, false, llvm::DINode::FlagZero, Align);
4113
24
4114
24
  // Insert an llvm.dbg.declare into the current block.
4115
24
  auto DL =
4116
24
      llvm::DebugLoc::get(Line, Column, LexicalBlockStack.back(), CurInlinedAt);
4117
24
  auto *Expr = DBuilder.createExpression(addr);
4118
24
  if (InsertPoint)
4119
23
    DBuilder.insertDeclare(Storage, D, Expr, DL, InsertPoint);
4120
1
  else
4121
1
    DBuilder.insertDeclare(Storage, D, Expr, DL, Builder.GetInsertBlock());
4122
24
}
4123
4124
void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *VD, llvm::Value *AI,
4125
                                           unsigned ArgNo,
4126
2.65k
                                           CGBuilderTy &Builder) {
4127
2.65k
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4128
2.65k
  EmitDeclare(VD, AI, ArgNo, Builder);
4129
2.65k
}
4130
4131
namespace {
4132
struct BlockLayoutChunk {
4133
  uint64_t OffsetInBits;
4134
  const BlockDecl::Capture *Capture;
4135
};
4136
12
bool operator<(const BlockLayoutChunk &l, const BlockLayoutChunk &r) {
4137
12
  return l.OffsetInBits < r.OffsetInBits;
4138
12
}
4139
} // namespace
4140
4141
void CGDebugInfo::collectDefaultFieldsForBlockLiteralDeclare(
4142
    const CGBlockInfo &Block, const ASTContext &Context, SourceLocation Loc,
4143
    const llvm::StructLayout &BlockLayout, llvm::DIFile *Unit,
4144
39
    SmallVectorImpl<llvm::Metadata *> &Fields) {
4145
39
  // Blocks in OpenCL have unique constraints which make the standard fields
4146
39
  // redundant while requiring size and align fields for enqueue_kernel. See
4147
39
  // initializeForBlockHeader in CGBlocks.cpp
4148
39
  if (CGM.getLangOpts().OpenCL) {
4149
11
    Fields.push_back(createFieldType("__size", Context.IntTy, Loc, AS_public,
4150
11
                                     BlockLayout.getElementOffsetInBits(0),
4151
11
                                     Unit, Unit));
4152
11
    Fields.push_back(createFieldType("__align", Context.IntTy, Loc, AS_public,
4153
11
                                     BlockLayout.getElementOffsetInBits(1),
4154
11
                                     Unit, Unit));
4155
28
  } else {
4156
28
    Fields.push_back(createFieldType("__isa", Context.VoidPtrTy, Loc, AS_public,
4157
28
                                     BlockLayout.getElementOffsetInBits(0),
4158
28
                                     Unit, Unit));
4159
28
    Fields.push_back(createFieldType("__flags", Context.IntTy, Loc, AS_public,
4160
28
                                     BlockLayout.getElementOffsetInBits(1),
4161
28
                                     Unit, Unit));
4162
28
    Fields.push_back(
4163
28
        createFieldType("__reserved", Context.IntTy, Loc, AS_public,
4164
28
                        BlockLayout.getElementOffsetInBits(2), Unit, Unit));
4165
28
    auto *FnTy = Block.getBlockExpr()->getFunctionType();
4166
28
    auto FnPtrType = CGM.getContext().getPointerType(FnTy->desugar());
4167
28
    Fields.push_back(createFieldType("__FuncPtr", FnPtrType, Loc, AS_public,
4168
28
                                     BlockLayout.getElementOffsetInBits(3),
4169
28
                                     Unit, Unit));
4170
28
    Fields.push_back(createFieldType(
4171
28
        "__descriptor",
4172
28
        Context.getPointerType(Block.NeedsCopyDispose
4173
28
                                   ? 
Context.getBlockDescriptorExtendedType()15
4174
28
                                   : 
Context.getBlockDescriptorType()13
),
4175
28
        Loc, AS_public, BlockLayout.getElementOffsetInBits(4), Unit, Unit));
4176
28
  }
4177
39
}
4178
4179
void CGDebugInfo::EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block,
4180
                                                       StringRef Name,
4181
                                                       unsigned ArgNo,
4182
                                                       llvm::AllocaInst *Alloca,
4183
39
                                                       CGBuilderTy &Builder) {
4184
39
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4185
39
  ASTContext &C = CGM.getContext();
4186
39
  const BlockDecl *blockDecl = block.getBlockDecl();
4187
39
4188
39
  // Collect some general information about the block's location.
4189
39
  SourceLocation loc = blockDecl->getCaretLocation();
4190
39
  llvm::DIFile *tunit = getOrCreateFile(loc);
4191
39
  unsigned line = getLineNumber(loc);
4192
39
  unsigned column = getColumnNumber(loc);
4193
39
4194
39
  // Build the debug-info type for the block literal.
4195
39
  getDeclContextDescriptor(blockDecl);
4196
39
4197
39
  const llvm::StructLayout *blockLayout =
4198
39
      CGM.getDataLayout().getStructLayout(block.StructureType);
4199
39
4200
39
  SmallVector<llvm::Metadata *, 16> fields;
4201
39
  collectDefaultFieldsForBlockLiteralDeclare(block, C, loc, *blockLayout, tunit,
4202
39
                                             fields);
4203
39
4204
39
  // We want to sort the captures by offset, not because DWARF
4205
39
  // requires this, but because we're paranoid about debuggers.
4206
39
  SmallVector<BlockLayoutChunk, 8> chunks;
4207
39
4208
39
  // 'this' capture.
4209
39
  if (blockDecl->capturesCXXThis()) {
4210
1
    BlockLayoutChunk chunk;
4211
1
    chunk.OffsetInBits =
4212
1
        blockLayout->getElementOffsetInBits(block.CXXThisIndex);
4213
1
    chunk.Capture = nullptr;
4214
1
    chunks.push_back(chunk);
4215
1
  }
4216
39
4217
39
  // Variable captures.
4218
39
  for (const auto &capture : blockDecl->captures()) {
4219
25
    const VarDecl *variable = capture.getVariable();
4220
25
    const CGBlockInfo::Capture &captureInfo = block.getCapture(variable);
4221
25
4222
25
    // Ignore constant captures.
4223
25
    if (captureInfo.isConstant())
4224
0
      continue;
4225
25
4226
25
    BlockLayoutChunk chunk;
4227
25
    chunk.OffsetInBits =
4228
25
        blockLayout->getElementOffsetInBits(captureInfo.getIndex());
4229
25
    chunk.Capture = &capture;
4230
25
    chunks.push_back(chunk);
4231
25
  }
4232
39
4233
39
  // Sort by offset.
4234
39
  llvm::array_pod_sort(chunks.begin(), chunks.end());
4235
39
4236
39
  for (const BlockLayoutChunk &Chunk : chunks) {
4237
26
    uint64_t offsetInBits = Chunk.OffsetInBits;
4238
26
    const BlockDecl::Capture *capture = Chunk.Capture;
4239
26
4240
26
    // If we have a null capture, this must be the C++ 'this' capture.
4241
26
    if (!capture) {
4242
1
      QualType type;
4243
1
      if (auto *Method =
4244
0
              cast_or_null<CXXMethodDecl>(blockDecl->getNonClosureContext()))
4245
0
        type = Method->getThisType();
4246
1
      else if (auto *RDecl = dyn_cast<CXXRecordDecl>(blockDecl->getParent()))
4247
1
        type = QualType(RDecl->getTypeForDecl(), 0);
4248
1
      else
4249
1
        
llvm_unreachable0
("unexpected block declcontext");
4250
1
4251
1
      fields.push_back(createFieldType("this", type, loc, AS_public,
4252
1
                                       offsetInBits, tunit, tunit));
4253
1
      continue;
4254
25
    }
4255
25
4256
25
    const VarDecl *variable = capture->getVariable();
4257
25
    StringRef name = variable->getName();
4258
25
4259
25
    llvm::DIType *fieldType;
4260
25
    if (capture->isByRef()) {
4261
7
      TypeInfo PtrInfo = C.getTypeInfo(C.VoidPtrTy);
4262
7
      auto Align = PtrInfo.AlignIsRequired ? 
PtrInfo.Align0
: 0;
4263
7
      // FIXME: This recomputes the layout of the BlockByRefWrapper.
4264
7
      uint64_t xoffset;
4265
7
      fieldType =
4266
7
          EmitTypeForVarWithBlocksAttr(variable, &xoffset).BlockByRefWrapper;
4267
7
      fieldType = DBuilder.createPointerType(fieldType, PtrInfo.Width);
4268
7
      fieldType = DBuilder.createMemberType(tunit, name, tunit, line,
4269
7
                                            PtrInfo.Width, Align, offsetInBits,
4270
7
                                            llvm::DINode::FlagZero, fieldType);
4271
18
    } else {
4272
18
      auto Align = getDeclAlignIfRequired(variable, CGM.getContext());
4273
18
      fieldType = createFieldType(name, variable->getType(), loc, AS_public,
4274
18
                                  offsetInBits, Align, tunit, tunit);
4275
18
    }
4276
25
    fields.push_back(fieldType);
4277
25
  }
4278
39
4279
39
  SmallString<36> typeName;
4280
39
  llvm::raw_svector_ostream(typeName)
4281
39
      << "__block_literal_" << CGM.getUniqueBlockCount();
4282
39
4283
39
  llvm::DINodeArray fieldsArray = DBuilder.getOrCreateArray(fields);
4284
39
4285
39
  llvm::DIType *type =
4286
39
      DBuilder.createStructType(tunit, typeName.str(), tunit, line,
4287
39
                                CGM.getContext().toBits(block.BlockSize), 0,
4288
39
                                llvm::DINode::FlagZero, nullptr, fieldsArray);
4289
39
  type = DBuilder.createPointerType(type, CGM.PointerWidthInBits);
4290
39
4291
39
  // Get overall information about the block.
4292
39
  llvm::DINode::DIFlags flags = llvm::DINode::FlagArtificial;
4293
39
  auto *scope = cast<llvm::DILocalScope>(LexicalBlockStack.back());
4294
39
4295
39
  // Create the descriptor for the parameter.
4296
39
  auto *debugVar = DBuilder.createParameterVariable(
4297
39
      scope, Name, ArgNo, tunit, line, type, CGM.getLangOpts().Optimize, flags);
4298
39
4299
39
  // Insert an llvm.dbg.declare into the current block.
4300
39
  DBuilder.insertDeclare(Alloca, debugVar, DBuilder.createExpression(),
4301
39
                         llvm::DebugLoc::get(line, column, scope, CurInlinedAt),
4302
39
                         Builder.GetInsertBlock());
4303
39
}
4304
4305
llvm::DIDerivedType *
4306
591
CGDebugInfo::getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D) {
4307
591
  if (!D || 
!D->isStaticDataMember()588
)
4308
543
    return nullptr;
4309
48
4310
48
  auto MI = StaticDataMemberCache.find(D->getCanonicalDecl());
4311
48
  if (MI != StaticDataMemberCache.end()) {
4312
14
    assert(MI->second && "Static data member declaration should still exist");
4313
14
    return MI->second;
4314
14
  }
4315
34
4316
34
  // If the member wasn't found in the cache, lazily construct and add it to the
4317
34
  // type (used when a limited form of the type is emitted).
4318
34
  auto DC = D->getDeclContext();
4319
34
  auto *Ctxt = cast<llvm::DICompositeType>(getDeclContextDescriptor(D));
4320
34
  return CreateRecordStaticField(D, Ctxt, cast<RecordDecl>(DC));
4321
34
}
4322
4323
llvm::DIGlobalVariableExpression *CGDebugInfo::CollectAnonRecordDecls(
4324
    const RecordDecl *RD, llvm::DIFile *Unit, unsigned LineNo,
4325
5
    StringRef LinkageName, llvm::GlobalVariable *Var, llvm::DIScope *DContext) {
4326
5
  llvm::DIGlobalVariableExpression *GVE = nullptr;
4327
5
4328
9
  for (const auto *Field : RD->fields()) {
4329
9
    llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit);
4330
9
    StringRef FieldName = Field->getName();
4331
9
4332
9
    // Ignore unnamed fields, but recurse into anonymous records.
4333
9
    if (FieldName.empty()) {
4334
2
      if (const auto *RT = dyn_cast<RecordType>(Field->getType()))
4335
2
        GVE = CollectAnonRecordDecls(RT->getDecl(), Unit, LineNo, LinkageName,
4336
2
                                     Var, DContext);
4337
2
      continue;
4338
2
    }
4339
7
    // Use VarDecl's Tag, Scope and Line number.
4340
7
    GVE = DBuilder.createGlobalVariableExpression(
4341
7
        DContext, FieldName, LinkageName, Unit, LineNo, FieldTy,
4342
7
        Var->hasLocalLinkage());
4343
7
    Var->addDebugInfo(GVE);
4344
7
  }
4345
5
  return GVE;
4346
5
}
4347
4348
void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
4349
577
                                     const VarDecl *D) {
4350
577
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4351
577
  if (D->hasAttr<NoDebugAttr>())
4352
4
    return;
4353
573
4354
573
  // If we already created a DIGlobalVariable for this declaration, just attach
4355
573
  // it to the llvm::GlobalVariable.
4356
573
  auto Cached = DeclCache.find(D->getCanonicalDecl());
4357
573
  if (Cached != DeclCache.end())
4358
3
    return Var->addDebugInfo(
4359
3
        cast<llvm::DIGlobalVariableExpression>(Cached->second));
4360
570
4361
570
  // Create global variable debug descriptor.
4362
570
  llvm::DIFile *Unit = nullptr;
4363
570
  llvm::DIScope *DContext = nullptr;
4364
570
  unsigned LineNo;
4365
570
  StringRef DeclName, LinkageName;
4366
570
  QualType T;
4367
570
  llvm::MDTuple *TemplateParameters = nullptr;
4368
570
  collectVarDeclProps(D, Unit, LineNo, T, DeclName, LinkageName,
4369
570
                      TemplateParameters, DContext);
4370
570
4371
570
  // Attempt to store one global variable for the declaration - even if we
4372
570
  // emit a lot of fields.
4373
570
  llvm::DIGlobalVariableExpression *GVE = nullptr;
4374
570
4375
570
  // If this is an anonymous union then we'll want to emit a global
4376
570
  // variable for each member of the anonymous union so that it's possible
4377
570
  // to find the name of any field in the union.
4378
570
  if (T->isUnionType() && 
DeclName.empty()22
) {
4379
3
    const RecordDecl *RD = T->castAs<RecordType>()->getDecl();
4380
3
    assert(RD->isAnonymousStructOrUnion() &&
4381
3
           "unnamed non-anonymous struct or union?");
4382
3
    GVE = CollectAnonRecordDecls(RD, Unit, LineNo, LinkageName, Var, DContext);
4383
567
  } else {
4384
567
    auto Align = getDeclAlignIfRequired(D, CGM.getContext());
4385
567
4386
567
    SmallVector<int64_t, 4> Expr;
4387
567
    unsigned AddressSpace =
4388
567
        CGM.getContext().getTargetAddressSpace(D->getType());
4389
567
    if (CGM.getLangOpts().CUDA && 
CGM.getLangOpts().CUDAIsDevice4
) {
4390
4
      if (D->hasAttr<CUDASharedAttr>())
4391
2
        AddressSpace =
4392
2
            CGM.getContext().getTargetAddressSpace(LangAS::cuda_shared);
4393
2
      else if (D->hasAttr<CUDAConstantAttr>())
4394
1
        AddressSpace =
4395
1
            CGM.getContext().getTargetAddressSpace(LangAS::cuda_constant);
4396
4
    }
4397
567
    AppendAddressSpaceXDeref(AddressSpace, Expr);
4398
567
4399
567
    GVE = DBuilder.createGlobalVariableExpression(
4400
567
        DContext, DeclName, LinkageName, Unit, LineNo, getOrCreateType(T, Unit),
4401
567
        Var->hasLocalLinkage(),
4402
567
        Expr.empty() ? 
nullptr544
:
DBuilder.createExpression(Expr)23
,
4403
567
        getOrCreateStaticDataMemberDeclarationOrNull(D), TemplateParameters,
4404
567
        Align);
4405
567
    Var->addDebugInfo(GVE);
4406
567
  }
4407
570
  DeclCache[D->getCanonicalDecl()].reset(GVE);
4408
570
}
4409
4410
72
void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) {
4411
72
  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
4412
72
  if (VD->hasAttr<NoDebugAttr>())
4413
2
    return;
4414
70
  auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
4415
70
  // Create the descriptor for the variable.
4416
70
  llvm::DIFile *Unit = getOrCreateFile(VD->getLocation());
4417
70
  StringRef Name = VD->getName();
4418
70
  llvm::DIType *Ty = getOrCreateType(VD->getType(), Unit);
4419
70
4420
70
  // Do not use global variables for enums, unless in CodeView.
4421
70
  if (const auto *ECD = dyn_cast<EnumConstantDecl>(VD)) {
4422
33
    const auto *ED = cast<EnumDecl>(ECD->getDeclContext());
4423
33
    assert(isa<EnumType>(ED->getTypeForDecl()) && "Enum without EnumType?");
4424
33
    (void)ED;
4425
33
4426
33
    // If CodeView, emit enums as global variables, unless they are defined
4427
33
    // inside a class. We do this because MSVC doesn't emit S_CONSTANTs for
4428
33
    // enums in classes, and because it is difficult to attach this scope
4429
33
    // information to the global variable.
4430
33
    if (!CGM.getCodeGenOpts().EmitCodeView ||
4431
33
        
isa<RecordDecl>(ED->getDeclContext())3
)
4432
30
      return;
4433
40
  }
4434
40
4435
40
  llvm::DIScope *DContext = nullptr;
4436
40
4437
40
  // Do not emit separate definitions for function local consts.
4438
40
  if (isa<FunctionDecl>(VD->getDeclContext()))
4439
2
    return;
4440
38
4441
38
  // Emit definition for static members in CodeView.
4442
38
  VD = cast<ValueDecl>(VD->getCanonicalDecl());
4443
38
  auto *VarD = dyn_cast<VarDecl>(VD);
4444
38
  if (VarD && 
VarD->isStaticDataMember()35
) {
4445
17
    auto *RD = cast<RecordDecl>(VarD->getDeclContext());
4446
17
    getDeclContextDescriptor(VarD);
4447
17
    // Ensure that the type is retained even though it's otherwise unreferenced.
4448
17
    //
4449
17
    // FIXME: This is probably unnecessary, since Ty should reference RD
4450
17
    // through its scope.
4451
17
    RetainedTypes.push_back(
4452
17
        CGM.getContext().getRecordType(RD).getAsOpaquePtr());
4453
17
4454
17
    if (!CGM.getCodeGenOpts().EmitCodeView)
4455
13
      return;
4456
4
4457
4
    // Use the global scope for static members.
4458
4
    DContext = getContextDescriptor(
4459
4
        cast<Decl>(CGM.getContext().getTranslationUnitDecl()), TheCU);
4460
21
  } else {
4461
21
    DContext = getDeclContextDescriptor(VD);
4462
21
  }
4463
38
4464
38
  auto &GV = DeclCache[VD];
4465
25
  if (GV)
4466
1
    return;
4467
24
  llvm::DIExpression *InitExpr = nullptr;
4468
24
  if (CGM.getContext().getTypeSize(VD->getType()) <= 64) {
4469
21
    // FIXME: Add a representation for integer constants wider than 64 bits.
4470
21
    if (Init.isInt())
4471
11
      InitExpr =
4472
11
          DBuilder.createConstantValueExpression(Init.getInt().getExtValue());
4473
10
    else if (Init.isFloat())
4474
10
      InitExpr = DBuilder.createConstantValueExpression(
4475
10
          Init.getFloat().bitcastToAPInt().getZExtValue());
4476
21
  }
4477
24
4478
24
  llvm::MDTuple *TemplateParameters = nullptr;
4479
24
4480
24
  if (isa<VarTemplateSpecializationDecl>(VD))
4481
2
    if (VarD) {
4482
2
      llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VarD, &*Unit);
4483
2
      TemplateParameters = parameterNodes.get();
4484
2
    }
4485
24
4486
24
  GV.reset(DBuilder.createGlobalVariableExpression(
4487
24
      DContext, Name, StringRef(), Unit, getLineNumber(VD->getLocation()), Ty,
4488
24
      true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VarD),
4489
24
      TemplateParameters, Align));
4490
24
}
4491
4492
54
llvm::DIScope *CGDebugInfo::getCurrentContextDescriptor(const Decl *D) {
4493
54
  if (!LexicalBlockStack.empty())
4494
26
    return LexicalBlockStack.back();
4495
28
  llvm::DIScope *Mod = getParentModuleOrNull(D);
4496
28
  return getContextDescriptor(D, Mod ? 
Mod4
:
TheCU24
);
4497
28
}
4498
4499
18.1k
void CGDebugInfo::EmitUsingDirective(const UsingDirectiveDecl &UD) {
4500
18.1k
  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4501
18.1k
    return;
4502
29
  const NamespaceDecl *NSDecl = UD.getNominatedNamespace();
4503
29
  if (!NSDecl->isAnonymousNamespace() ||
4504
29
      
CGM.getCodeGenOpts().DebugExplicitImport20
) {
4505
11
    auto Loc = UD.getLocation();
4506
11
    DBuilder.createImportedModule(
4507
11
        getCurrentContextDescriptor(cast<Decl>(UD.getDeclContext())),
4508
11
        getOrCreateNamespace(NSDecl), getOrCreateFile(Loc), getLineNumber(Loc));
4509
11
  }
4510
29
}
4511
4512
33.6k
void CGDebugInfo::EmitUsingDecl(const UsingDecl &UD) {
4513
33.6k
  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4514
33.6k
    return;
4515
41
  assert(UD.shadow_size() &&
4516
41
         "We shouldn't be codegening an invalid UsingDecl containing no decls");
4517
41
  // Emitting one decl is sufficient - debuggers can detect that this is an
4518
41
  // overloaded name & provide lookup for all the overloads.
4519
41
  const UsingShadowDecl &USD = **UD.shadow_begin();
4520
41
4521
41
  // FIXME: Skip functions with undeduced auto return type for now since we
4522
41
  // don't currently have the plumbing for separate declarations & definitions
4523
41
  // of free functions and mismatched types (auto in the declaration, concrete
4524
41
  // return type in the definition)
4525
41
  if (const auto *FD = dyn_cast<FunctionDecl>(USD.getUnderlyingDecl()))
4526
8
    if (const auto *AT =
4527
2
            FD->getType()->getAs<FunctionProtoType>()->getContainedAutoType())
4528
2
      if (AT->getDeducedType().isNull())
4529
1
        return;
4530
40
  if (llvm::DINode *Target =
4531
25
          getDeclarationOrDefinition(USD.getUnderlyingDecl())) {
4532
25
    auto Loc = USD.getLocation();
4533
25
    DBuilder.createImportedDeclaration(
4534
25
        getCurrentContextDescriptor(cast<Decl>(USD.getDeclContext())), Target,
4535
25
        getOrCreateFile(Loc), getLineNumber(Loc));
4536
25
  }
4537
40
}
4538
4539
88
void CGDebugInfo::EmitImportDecl(const ImportDecl &ID) {
4540
88
  if (CGM.getCodeGenOpts().getDebuggerTuning() != llvm::DebuggerKind::LLDB)
4541
76
    return;
4542
12
  if (Module *M = ID.getImportedModule()) {
4543
12
    auto Info = ExternalASTSource::ASTSourceDescriptor(*M);
4544
12
    auto Loc = ID.getLocation();
4545
12
    DBuilder.createImportedDeclaration(
4546
12
        getCurrentContextDescriptor(cast<Decl>(ID.getDeclContext())),
4547
12
        getOrCreateModuleRef(Info, DebugTypeExtRefs), getOrCreateFile(Loc),
4548
12
        getLineNumber(Loc));
4549
12
  }
4550
12
}
4551
4552
llvm::DIImportedEntity *
4553
22
CGDebugInfo::EmitNamespaceAlias(const NamespaceAliasDecl &NA) {
4554
22
  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4555
14
    return nullptr;
4556
8
  auto &VH = NamespaceAliasCache[&NA];
4557
8
  if (VH)
4558
2
    return cast<llvm::DIImportedEntity>(VH);
4559
6
  llvm::DIImportedEntity *R;
4560
6
  auto Loc = NA.getLocation();
4561
6
  if (const auto *Underlying =
4562
2
          dyn_cast<NamespaceAliasDecl>(NA.getAliasedNamespace()))
4563
2
    // This could cache & dedup here rather than relying on metadata deduping.
4564
2
    R = DBuilder.createImportedDeclaration(
4565
2
        getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())),
4566
2
        EmitNamespaceAlias(*Underlying), getOrCreateFile(Loc),
4567
2
        getLineNumber(Loc), NA.getName());
4568
4
  else
4569
4
    R = DBuilder.createImportedDeclaration(
4570
4
        getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())),
4571
4
        getOrCreateNamespace(cast<NamespaceDecl>(NA.getAliasedNamespace())),
4572
4
        getOrCreateFile(Loc), getLineNumber(Loc), NA.getName());
4573
6
  VH.reset(R);
4574
6
  return R;
4575
6
}
4576
4577
llvm::DINamespace *
4578
606
CGDebugInfo::getOrCreateNamespace(const NamespaceDecl *NSDecl) {
4579
606
  // Don't canonicalize the NamespaceDecl here: The DINamespace will be uniqued
4580
606
  // if necessary, and this way multiple declarations of the same namespace in
4581
606
  // different parent modules stay distinct.
4582
606
  auto I = NamespaceCache.find(NSDecl);
4583
606
  if (I != NamespaceCache.end())
4584
443
    return cast<llvm::DINamespace>(I->second);
4585
163
4586
163
  llvm::DIScope *Context = getDeclContextDescriptor(NSDecl);
4587
163
  // Don't trust the context if it is a DIModule (see comment above).
4588
163
  llvm::DINamespace *NS =
4589
163
      DBuilder.createNameSpace(Context, NSDecl->getName(), NSDecl->isInline());
4590
163
  NamespaceCache[NSDecl].reset(NS);
4591
163
  return NS;
4592
163
}
4593
4594
23
void CGDebugInfo::setDwoId(uint64_t Signature) {
4595
23
  assert(TheCU && "no main compile unit");
4596
23
  TheCU->setDWOId(Signature);
4597
23
}
4598
4599
/// Analyzes each function parameter to determine whether it is constant
4600
/// throughout the function body.
4601
static void analyzeParametersModification(
4602
    ASTContext &Ctx,
4603
    llvm::DenseMap<const FunctionDecl *, llvm::TrackingMDRef> &SPDefCache,
4604
3
    llvm::DenseMap<const ParmVarDecl *, llvm::TrackingMDRef> &ParamCache) {
4605
3
  for (auto &SP : SPDefCache) {
4606
2
    auto *FD = SP.first;
4607
2
    assert(FD->hasBody() && "Functions must have body here");
4608
2
    const Stmt *FuncBody = (*FD).getBody();
4609
5
    for (auto Parm : FD->parameters()) {
4610
5
      ExprMutationAnalyzer FuncAnalyzer(*FuncBody, Ctx);
4611
5
      if (FuncAnalyzer.isMutated(Parm))
4612
1
        continue;
4613
4
4614
4
      auto I = ParamCache.find(Parm);
4615
4
      assert(I != ParamCache.end() && "Parameters should be already cached");
4616
4
      auto *DIParm = cast<llvm::DILocalVariable>(I->second);
4617
4
      DIParm->setIsNotModified();
4618
4
    }
4619
2
  }
4620
3
}
4621
4622
2.91k
void CGDebugInfo::finalize() {
4623
2.91k
  // Creating types might create further types - invalidating the current
4624
2.91k
  // element and the size(), so don't cache/reference them.
4625
3.00k
  for (size_t i = 0; i != ObjCInterfaceCache.size(); 
++i82
) {
4626
82
    ObjCInterfaceCacheEntry E = ObjCInterfaceCache[i];
4627
82
    llvm::DIType *Ty = E.Type->getDecl()->getDefinition()
4628
82
                           ? 
CreateTypeDefinition(E.Type, E.Unit)68
4629
82
                           : 
E.Decl14
;
4630
82
    DBuilder.replaceTemporary(llvm::TempDIType(E.Decl), Ty);
4631
82
  }
4632
2.91k
4633
2.91k
  if (CGM.getCodeGenOpts().DwarfVersion >= 5) {
4634
9
    // Add methods to interface.
4635
9
    for (const auto &P : ObjCMethodCache) {
4636
1
      if (P.second.empty())
4637
0
        continue;
4638
1
4639
1
      QualType QTy(P.first->getTypeForDecl(), 0);
4640
1
      auto It = TypeCache.find(QTy.getAsOpaquePtr());
4641
1
      assert(It != TypeCache.end());
4642
1
4643
1
      llvm::DICompositeType *InterfaceDecl =
4644
1
          cast<llvm::DICompositeType>(It->second);
4645
1
4646
1
      SmallVector<llvm::Metadata *, 16> EltTys;
4647
1
      auto CurrenetElts = InterfaceDecl->getElements();
4648
1
      EltTys.append(CurrenetElts.begin(), CurrenetElts.end());
4649
1
      for (auto &MD : P.second)
4650
4
        EltTys.push_back(MD);
4651
1
      llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys);
4652
1
      DBuilder.replaceArrays(InterfaceDecl, Elements);
4653
1
    }
4654
9
  }
4655
2.91k
4656
2.91k
  for (const auto &P : ReplaceMap) {
4657
369
    assert(P.second);
4658
369
    auto *Ty = cast<llvm::DIType>(P.second);
4659
369
    assert(Ty->isForwardDecl());
4660
369
4661
369
    auto It = TypeCache.find(P.first);
4662
369
    assert(It != TypeCache.end());
4663
369
    assert(It->second);
4664
369
4665
369
    DBuilder.replaceTemporary(llvm::TempDIType(Ty),
4666
369
                              cast<llvm::DIType>(It->second));
4667
369
  }
4668
2.91k
4669
2.91k
  for (const auto &P : FwdDeclReplaceMap) {
4670
8
    assert(P.second);
4671
8
    llvm::TempMDNode FwdDecl(cast<llvm::MDNode>(P.second));
4672
8
    llvm::Metadata *Repl;
4673
8
4674
8
    auto It = DeclCache.find(P.first);
4675
8
    // If there has been no definition for the declaration, call RAUW
4676
8
    // with ourselves, that will destroy the temporary MDNode and
4677
8
    // replace it with a standard one, avoiding leaking memory.
4678
8
    if (It == DeclCache.end())
4679
4
      Repl = P.second;
4680
4
    else
4681
4
      Repl = It->second;
4682
8
4683
8
    if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(Repl))
4684
2
      Repl = GVE->getVariable();
4685
8
    DBuilder.replaceTemporary(std::move(FwdDecl), cast<llvm::MDNode>(Repl));
4686
8
  }
4687
2.91k
4688
2.91k
  // We keep our own list of retained types, because we need to look
4689
2.91k
  // up the final type in the type cache.
4690
2.91k
  for (auto &RT : RetainedTypes)
4691
263
    if (auto MD = TypeCache[RT])
4692
263
      DBuilder.retainType(cast<llvm::DIType>(MD));
4693
2.91k
4694
2.91k
  if (CGM.getCodeGenOpts().EnableDebugEntryValues)
4695
3
    // This will be used to emit debug entry values.
4696
3
    analyzeParametersModification(CGM.getContext(), SPDefCache, ParamCache);
4697
2.91k
4698
2.91k
  DBuilder.finalize();
4699
2.91k
}
4700
4701
121k
void CGDebugInfo::EmitExplicitCastType(QualType Ty) {
4702
121k
  if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo)
4703
121k
    return;
4704
117
4705
117
  if (auto *DieTy = getOrCreateType(Ty, TheCU->getFile()))
4706
99
    // Don't ignore in case of explicit cast where it is referenced indirectly.
4707
99
    DBuilder.retainType(DieTy);
4708
117
}
4709
4710
72.2k
llvm::DebugLoc CGDebugInfo::SourceLocToDebugLoc(SourceLocation Loc) {
4711
72.2k
  if (LexicalBlockStack.empty())
4712
0
    return llvm::DebugLoc();
4713
72.2k
4714
72.2k
  llvm::MDNode *Scope = LexicalBlockStack.back();
4715
72.2k
  return llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc), Scope);
4716
72.2k
}
4717
4718
117k
llvm::DINode::DIFlags CGDebugInfo::getCallSiteRelatedAttrs() const {
4719
117k
  // Call site-related attributes are only useful in optimized programs, and
4720
117k
  // when there's a possibility of debugging backtraces.
4721
117k
  if (!CGM.getLangOpts().Optimize || 
DebugKind == codegenoptions::NoDebugInfo114k
||
4722
117k
      
DebugKind == codegenoptions::LocTrackingOnly114k
)
4723
2.80k
    return llvm::DINode::FlagZero;
4724
114k
4725
114k
  // Call site-related attributes are available in DWARF v5. Some debuggers,
4726
114k
  // while not fully DWARF v5-compliant, may accept these attributes as if they
4727
114k
  // were part of DWARF v4.
4728
114k
  bool SupportsDWARFv4Ext =
4729
114k
      CGM.getCodeGenOpts().DwarfVersion == 4 &&
4730
114k
      
(32
CGM.getCodeGenOpts().getDebuggerTuning() == llvm::DebuggerKind::LLDB32
||
4731
32
       
(22
CGM.getCodeGenOpts().EnableDebugEntryValues22
&&
4732
22
       
CGM.getCodeGenOpts().getDebuggerTuning() == llvm::DebuggerKind::GDB9
));
4733
114k
4734
114k
  if (!SupportsDWARFv4Ext && 
CGM.getCodeGenOpts().DwarfVersion < 5114k
)
4735
114k
    return llvm::DINode::FlagZero;
4736
24
4737
24
  return llvm::DINode::FlagAllCallsDescribed;
4738
24
}