Bug Summary

File:tools/clang/lib/Serialization/ASTReaderDecl.cpp
Warning:line 222, column 11
Potential memory leak

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ASTReaderDecl.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model pic -pic-level 2 -mthread-model posix -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn325874/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-7~svn325874/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn325874/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn325874/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn325874/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn325874/build-llvm/tools/clang/lib/Serialization -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-02-23-163436-368-1 -x c++ /build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp

/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp

1//===--- ASTReaderDecl.cpp - Decl Deserialization ---------------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the ASTReader::ReadDeclRecord method, which is the
11// entrypoint for loading a decl.
12//
13//===----------------------------------------------------------------------===//
14
15#include "ASTCommon.h"
16#include "ASTReaderInternals.h"
17#include "clang/AST/ASTContext.h"
18#include "clang/AST/DeclCXX.h"
19#include "clang/AST/DeclGroup.h"
20#include "clang/AST/DeclTemplate.h"
21#include "clang/AST/DeclVisitor.h"
22#include "clang/AST/Expr.h"
23#include "clang/Sema/IdentifierResolver.h"
24#include "clang/Sema/SemaDiagnostic.h"
25#include "clang/Serialization/ASTReader.h"
26#include "llvm/Support/SaveAndRestore.h"
27
28using namespace clang;
29using namespace clang::serialization;
30
31//===----------------------------------------------------------------------===//
32// Declaration deserialization
33//===----------------------------------------------------------------------===//
34
35namespace clang {
36 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
37 ASTReader &Reader;
38 ASTRecordReader &Record;
39 ASTReader::RecordLocation Loc;
40 const DeclID ThisDeclID;
41 const SourceLocation ThisDeclLoc;
42 typedef ASTReader::RecordData RecordData;
43 TypeID TypeIDForTypeDecl;
44 unsigned AnonymousDeclNumber;
45 GlobalDeclID NamedDeclForTagDecl;
46 IdentifierInfo *TypedefNameForLinkage;
47
48 bool HasPendingBody;
49
50 ///\brief A flag to carry the information for a decl from the entity is
51 /// used. We use it to delay the marking of the canonical decl as used until
52 /// the entire declaration is deserialized and merged.
53 bool IsDeclMarkedUsed;
54
55 uint64_t GetCurrentCursorOffset();
56
57 uint64_t ReadLocalOffset() {
58 uint64_t LocalOffset = Record.readInt();
59 assert(LocalOffset < Loc.Offset && "offset point after current record")(static_cast <bool> (LocalOffset < Loc.Offset &&
"offset point after current record") ? void (0) : __assert_fail
("LocalOffset < Loc.Offset && \"offset point after current record\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 59, __extension__ __PRETTY_FUNCTION__))
;
60 return LocalOffset ? Loc.Offset - LocalOffset : 0;
61 }
62
63 uint64_t ReadGlobalOffset() {
64 uint64_t Local = ReadLocalOffset();
65 return Local ? Record.getGlobalBitOffset(Local) : 0;
66 }
67
68 SourceLocation ReadSourceLocation() {
69 return Record.readSourceLocation();
70 }
71
72 SourceRange ReadSourceRange() {
73 return Record.readSourceRange();
74 }
75
76 TypeSourceInfo *GetTypeSourceInfo() {
77 return Record.getTypeSourceInfo();
78 }
79
80 serialization::DeclID ReadDeclID() {
81 return Record.readDeclID();
82 }
83
84 std::string ReadString() {
85 return Record.readString();
86 }
87
88 void ReadDeclIDList(SmallVectorImpl<DeclID> &IDs) {
89 for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
90 IDs.push_back(ReadDeclID());
91 }
92
93 Decl *ReadDecl() {
94 return Record.readDecl();
95 }
96
97 template<typename T>
98 T *ReadDeclAs() {
99 return Record.readDeclAs<T>();
100 }
101
102 void ReadQualifierInfo(QualifierInfo &Info) {
103 Record.readQualifierInfo(Info);
104 }
105
106 void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name) {
107 Record.readDeclarationNameLoc(DNLoc, Name);
108 }
109
110 serialization::SubmoduleID readSubmoduleID() {
111 if (Record.getIdx() == Record.size())
112 return 0;
113
114 return Record.getGlobalSubmoduleID(Record.readInt());
115 }
116
117 Module *readModule() {
118 return Record.getSubmodule(readSubmoduleID());
119 }
120
121 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
122 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
123 const CXXRecordDecl *D);
124 void MergeDefinitionData(CXXRecordDecl *D,
125 struct CXXRecordDecl::DefinitionData &&NewDD);
126 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
127 void MergeDefinitionData(ObjCInterfaceDecl *D,
128 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
129 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
130 void MergeDefinitionData(ObjCProtocolDecl *D,
131 struct ObjCProtocolDecl::DefinitionData &&NewDD);
132
133 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
134 DeclContext *DC,
135 unsigned Index);
136 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
137 unsigned Index, NamedDecl *D);
138
139 /// Results from loading a RedeclarableDecl.
140 class RedeclarableResult {
141 Decl *MergeWith;
142 GlobalDeclID FirstID;
143 bool IsKeyDecl;
144
145 public:
146 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
147 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
148
149 /// \brief Retrieve the first ID.
150 GlobalDeclID getFirstID() const { return FirstID; }
151
152 /// \brief Is this declaration a key declaration?
153 bool isKeyDecl() const { return IsKeyDecl; }
154
155 /// \brief Get a known declaration that this should be merged with, if
156 /// any.
157 Decl *getKnownMergeTarget() const { return MergeWith; }
158 };
159
160 /// \brief Class used to capture the result of searching for an existing
161 /// declaration of a specific kind and name, along with the ability
162 /// to update the place where this result was found (the declaration
163 /// chain hanging off an identifier or the DeclContext we searched in)
164 /// if requested.
165 class FindExistingResult {
166 ASTReader &Reader;
167 NamedDecl *New;
168 NamedDecl *Existing;
169 bool AddResult;
170
171 unsigned AnonymousDeclNumber;
172 IdentifierInfo *TypedefNameForLinkage;
173
174 void operator=(FindExistingResult &&) = delete;
175
176 public:
177 FindExistingResult(ASTReader &Reader)
178 : Reader(Reader), New(nullptr), Existing(nullptr), AddResult(false),
179 AnonymousDeclNumber(0), TypedefNameForLinkage(nullptr) {}
180
181 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
182 unsigned AnonymousDeclNumber,
183 IdentifierInfo *TypedefNameForLinkage)
184 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
185 AnonymousDeclNumber(AnonymousDeclNumber),
186 TypedefNameForLinkage(TypedefNameForLinkage) {}
187
188 FindExistingResult(FindExistingResult &&Other)
189 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
190 AddResult(Other.AddResult),
191 AnonymousDeclNumber(Other.AnonymousDeclNumber),
192 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
193 Other.AddResult = false;
194 }
195
196 ~FindExistingResult();
197
198 /// \brief Suppress the addition of this result into the known set of
199 /// names.
200 void suppress() { AddResult = false; }
201
202 operator NamedDecl*() const { return Existing; }
203
204 template<typename T>
205 operator T*() const { return dyn_cast_or_null<T>(Existing); }
206 };
207
208 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
209 DeclContext *DC);
210 FindExistingResult findExisting(NamedDecl *D);
211
212 public:
213 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
214 ASTReader::RecordLocation Loc,
215 DeclID thisDeclID, SourceLocation ThisDeclLoc)
216 : Reader(Reader), Record(Record), Loc(Loc),
217 ThisDeclID(thisDeclID), ThisDeclLoc(ThisDeclLoc),
218 TypeIDForTypeDecl(0), NamedDeclForTagDecl(0),
219 TypedefNameForLinkage(nullptr), HasPendingBody(false),
220 IsDeclMarkedUsed(false) {}
221
222 template <typename T> static
223 void AddLazySpecializations(T *D,
224 SmallVectorImpl<serialization::DeclID>& IDs) {
225 if (IDs.empty())
226 return;
227
228 // FIXME: We should avoid this pattern of getting the ASTContext.
229 ASTContext &C = D->getASTContext();
230
231 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
232
233 if (auto &Old = LazySpecializations) {
234 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
235 std::sort(IDs.begin(), IDs.end());
236 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
237 }
238
239 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
240 *Result = IDs.size();
241 std::copy(IDs.begin(), IDs.end(), Result + 1);
242
243 LazySpecializations = Result;
244 }
245
246 template <typename DeclT>
247 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
248 static Decl *getMostRecentDeclImpl(...);
249 static Decl *getMostRecentDecl(Decl *D);
250
251 template <typename DeclT>
252 static void attachPreviousDeclImpl(ASTReader &Reader,
253 Redeclarable<DeclT> *D, Decl *Previous,
254 Decl *Canon);
255 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
256 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
257 Decl *Canon);
258
259 template <typename DeclT>
260 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
261 static void attachLatestDeclImpl(...);
262 static void attachLatestDecl(Decl *D, Decl *latest);
263
264 template <typename DeclT>
265 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
266 static void markIncompleteDeclChainImpl(...);
267
268 /// \brief Determine whether this declaration has a pending body.
269 bool hasPendingBody() const { return HasPendingBody; }
270
271 void ReadFunctionDefinition(FunctionDecl *FD);
272 void Visit(Decl *D);
273
274 void UpdateDecl(Decl *D, llvm::SmallVectorImpl<serialization::DeclID>&);
275
276 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
277 ObjCCategoryDecl *Next) {
278 Cat->NextClassCategory = Next;
279 }
280
281 void VisitDecl(Decl *D);
282 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
283 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
284 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
285 void VisitNamedDecl(NamedDecl *ND);
286 void VisitLabelDecl(LabelDecl *LD);
287 void VisitNamespaceDecl(NamespaceDecl *D);
288 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
289 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
290 void VisitTypeDecl(TypeDecl *TD);
291 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
292 void VisitTypedefDecl(TypedefDecl *TD);
293 void VisitTypeAliasDecl(TypeAliasDecl *TD);
294 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
295 RedeclarableResult VisitTagDecl(TagDecl *TD);
296 void VisitEnumDecl(EnumDecl *ED);
297 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
298 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
299 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
300 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
301 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
302 ClassTemplateSpecializationDecl *D);
303 void VisitClassTemplateSpecializationDecl(
304 ClassTemplateSpecializationDecl *D) {
305 VisitClassTemplateSpecializationDeclImpl(D);
306 }
307 void VisitClassTemplatePartialSpecializationDecl(
308 ClassTemplatePartialSpecializationDecl *D);
309 void VisitClassScopeFunctionSpecializationDecl(
310 ClassScopeFunctionSpecializationDecl *D);
311 RedeclarableResult
312 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
313 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
314 VisitVarTemplateSpecializationDeclImpl(D);
315 }
316 void VisitVarTemplatePartialSpecializationDecl(
317 VarTemplatePartialSpecializationDecl *D);
318 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
319 void VisitValueDecl(ValueDecl *VD);
320 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
321 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
322 void VisitDeclaratorDecl(DeclaratorDecl *DD);
323 void VisitFunctionDecl(FunctionDecl *FD);
324 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
325 void VisitCXXMethodDecl(CXXMethodDecl *D);
326 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
327 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
328 void VisitCXXConversionDecl(CXXConversionDecl *D);
329 void VisitFieldDecl(FieldDecl *FD);
330 void VisitMSPropertyDecl(MSPropertyDecl *FD);
331 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
332 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
333 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
334 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
335 void VisitParmVarDecl(ParmVarDecl *PD);
336 void VisitDecompositionDecl(DecompositionDecl *DD);
337 void VisitBindingDecl(BindingDecl *BD);
338 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
339 DeclID VisitTemplateDecl(TemplateDecl *D);
340 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
341 void VisitClassTemplateDecl(ClassTemplateDecl *D);
342 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
343 void VisitVarTemplateDecl(VarTemplateDecl *D);
344 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
345 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
346 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
347 void VisitUsingDecl(UsingDecl *D);
348 void VisitUsingPackDecl(UsingPackDecl *D);
349 void VisitUsingShadowDecl(UsingShadowDecl *D);
350 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
351 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
352 void VisitExportDecl(ExportDecl *D);
353 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
354 void VisitImportDecl(ImportDecl *D);
355 void VisitAccessSpecDecl(AccessSpecDecl *D);
356 void VisitFriendDecl(FriendDecl *D);
357 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
358 void VisitStaticAssertDecl(StaticAssertDecl *D);
359 void VisitBlockDecl(BlockDecl *BD);
360 void VisitCapturedDecl(CapturedDecl *CD);
361 void VisitEmptyDecl(EmptyDecl *D);
362
363 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
364
365 template<typename T>
366 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
367
368 template<typename T>
369 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
370 DeclID TemplatePatternID = 0);
371
372 template<typename T>
373 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
374 RedeclarableResult &Redecl,
375 DeclID TemplatePatternID = 0);
376
377 template<typename T>
378 void mergeMergeable(Mergeable<T> *D);
379
380 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
381 RedeclarableTemplateDecl *Existing,
382 DeclID DsID, bool IsKeyDecl);
383
384 ObjCTypeParamList *ReadObjCTypeParamList();
385
386 // FIXME: Reorder according to DeclNodes.td?
387 void VisitObjCMethodDecl(ObjCMethodDecl *D);
388 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
389 void VisitObjCContainerDecl(ObjCContainerDecl *D);
390 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
391 void VisitObjCIvarDecl(ObjCIvarDecl *D);
392 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
393 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
394 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
395 void VisitObjCImplDecl(ObjCImplDecl *D);
396 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
397 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
398 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
399 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
400 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
401 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
402 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
403 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
404 };
405} // end namespace clang
406
407namespace {
408/// Iterator over the redeclarations of a declaration that have already
409/// been merged into the same redeclaration chain.
410template<typename DeclT>
411class MergedRedeclIterator {
412 DeclT *Start, *Canonical, *Current;
413public:
414 MergedRedeclIterator() : Current(nullptr) {}
415 MergedRedeclIterator(DeclT *Start)
416 : Start(Start), Canonical(nullptr), Current(Start) {}
417
418 DeclT *operator*() { return Current; }
419
420 MergedRedeclIterator &operator++() {
421 if (Current->isFirstDecl()) {
422 Canonical = Current;
423 Current = Current->getMostRecentDecl();
424 } else
425 Current = Current->getPreviousDecl();
426
427 // If we started in the merged portion, we'll reach our start position
428 // eventually. Otherwise, we'll never reach it, but the second declaration
429 // we reached was the canonical declaration, so stop when we see that one
430 // again.
431 if (Current == Start || Current == Canonical)
432 Current = nullptr;
433 return *this;
434 }
435
436 friend bool operator!=(const MergedRedeclIterator &A,
437 const MergedRedeclIterator &B) {
438 return A.Current != B.Current;
439 }
440};
441} // end anonymous namespace
442
443template <typename DeclT>
444static llvm::iterator_range<MergedRedeclIterator<DeclT>>
445merged_redecls(DeclT *D) {
446 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
447 MergedRedeclIterator<DeclT>());
448}
449
450uint64_t ASTDeclReader::GetCurrentCursorOffset() {
451 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
452}
453
454void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
455 if (Record.readInt())
456 Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
457 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
458 CD->NumCtorInitializers = Record.readInt();
459 if (CD->NumCtorInitializers)
460 CD->CtorInitializers = ReadGlobalOffset();
461 }
462 // Store the offset of the body so we can lazily load it later.
463 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
464 HasPendingBody = true;
465}
466
467void ASTDeclReader::Visit(Decl *D) {
468 DeclVisitor<ASTDeclReader, void>::Visit(D);
469
470 // At this point we have deserialized and merged the decl and it is safe to
471 // update its canonical decl to signal that the entire entity is used.
472 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
473 IsDeclMarkedUsed = false;
474
475 if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
476 if (DD->DeclInfo) {
477 DeclaratorDecl::ExtInfo *Info =
478 DD->DeclInfo.get<DeclaratorDecl::ExtInfo *>();
479 Info->TInfo = GetTypeSourceInfo();
480 }
481 else {
482 DD->DeclInfo = GetTypeSourceInfo();
483 }
484 }
485
486 if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
487 // We have a fully initialized TypeDecl. Read its type now.
488 TD->setTypeForDecl(Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull());
489
490 // If this is a tag declaration with a typedef name for linkage, it's safe
491 // to load that typedef now.
492 if (NamedDeclForTagDecl)
493 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
494 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
495 } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
496 // if we have a fully initialized TypeDecl, we can safely read its type now.
497 ID->TypeForDecl = Reader.GetType(TypeIDForTypeDecl).getTypePtrOrNull();
498 } else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
499 // FunctionDecl's body was written last after all other Stmts/Exprs.
500 // We only read it if FD doesn't already have a body (e.g., from another
501 // module).
502 // FIXME: Can we diagnose ODR violations somehow?
503 if (Record.readInt())
504 ReadFunctionDefinition(FD);
505 }
506}
507
508void ASTDeclReader::VisitDecl(Decl *D) {
509 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
510 isa<ParmVarDecl>(D)) {
511 // We don't want to deserialize the DeclContext of a template
512 // parameter or of a parameter of a function template immediately. These
513 // entities might be used in the formulation of its DeclContext (for
514 // example, a function parameter can be used in decltype() in trailing
515 // return type of the function). Use the translation unit DeclContext as a
516 // placeholder.
517 GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
518 GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
519 if (!LexicalDCIDForTemplateParmDecl)
520 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
521 Reader.addPendingDeclContextInfo(D,
522 SemaDCIDForTemplateParmDecl,
523 LexicalDCIDForTemplateParmDecl);
524 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
525 } else {
526 DeclContext *SemaDC = ReadDeclAs<DeclContext>();
527 DeclContext *LexicalDC = ReadDeclAs<DeclContext>();
528 if (!LexicalDC)
529 LexicalDC = SemaDC;
530 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
531 // Avoid calling setLexicalDeclContext() directly because it uses
532 // Decl::getASTContext() internally which is unsafe during derialization.
533 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
534 Reader.getContext());
535 }
536 D->setLocation(ThisDeclLoc);
537 D->setInvalidDecl(Record.readInt());
538 if (Record.readInt()) { // hasAttrs
539 AttrVec Attrs;
540 Record.readAttributes(Attrs);
541 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
542 // internally which is unsafe during derialization.
543 D->setAttrsImpl(Attrs, Reader.getContext());
544 }
545 D->setImplicit(Record.readInt());
546 D->Used = Record.readInt();
547 IsDeclMarkedUsed |= D->Used;
548 D->setReferenced(Record.readInt());
549 D->setTopLevelDeclInObjCContainer(Record.readInt());
550 D->setAccess((AccessSpecifier)Record.readInt());
551 D->FromASTFile = true;
552 bool ModulePrivate = Record.readInt();
553
554 // Determine whether this declaration is part of a (sub)module. If so, it
555 // may not yet be visible.
556 if (unsigned SubmoduleID = readSubmoduleID()) {
557 // Store the owning submodule ID in the declaration.
558 D->setModuleOwnershipKind(
559 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
560 : Decl::ModuleOwnershipKind::VisibleWhenImported);
561 D->setOwningModuleID(SubmoduleID);
562
563 if (ModulePrivate) {
564 // Module-private declarations are never visible, so there is no work to
565 // do.
566 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
567 // If local visibility is being tracked, this declaration will become
568 // hidden and visible as the owning module does.
569 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
570 // Mark the declaration as visible when its owning module becomes visible.
571 if (Owner->NameVisibility == Module::AllVisible)
572 D->setVisibleDespiteOwningModule();
573 else
574 Reader.HiddenNamesMap[Owner].push_back(D);
575 }
576 } else if (ModulePrivate) {
577 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
578 }
579}
580
581void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
582 VisitDecl(D);
583 D->setLocation(ReadSourceLocation());
584 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
585 std::string Arg = ReadString();
586 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
587 D->getTrailingObjects<char>()[Arg.size()] = '\0';
588}
589
590void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
591 VisitDecl(D);
592 D->setLocation(ReadSourceLocation());
593 std::string Name = ReadString();
594 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
595 D->getTrailingObjects<char>()[Name.size()] = '\0';
596
597 D->ValueStart = Name.size() + 1;
598 std::string Value = ReadString();
599 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
600 Value.size());
601 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
602}
603
604void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
605 llvm_unreachable("Translation units are not serialized")::llvm::llvm_unreachable_internal("Translation units are not serialized"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 605)
;
606}
607
608void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
609 VisitDecl(ND);
610 ND->setDeclName(Record.readDeclarationName());
611 AnonymousDeclNumber = Record.readInt();
612}
613
614void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
615 VisitNamedDecl(TD);
616 TD->setLocStart(ReadSourceLocation());
617 // Delay type reading until after we have fully initialized the decl.
618 TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
619}
620
621ASTDeclReader::RedeclarableResult
622ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
623 RedeclarableResult Redecl = VisitRedeclarable(TD);
624 VisitTypeDecl(TD);
625 TypeSourceInfo *TInfo = GetTypeSourceInfo();
626 if (Record.readInt()) { // isModed
627 QualType modedT = Record.readType();
628 TD->setModedTypeSourceInfo(TInfo, modedT);
629 } else
630 TD->setTypeSourceInfo(TInfo);
631 // Read and discard the declaration for which this is a typedef name for
632 // linkage, if it exists. We cannot rely on our type to pull in this decl,
633 // because it might have been merged with a type from another module and
634 // thus might not refer to our version of the declaration.
635 ReadDecl();
636 return Redecl;
637}
638
639void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
640 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
641 mergeRedeclarable(TD, Redecl);
642}
643
644void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
645 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
646 if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
647 // Merged when we merge the template.
648 TD->setDescribedAliasTemplate(Template);
649 else
650 mergeRedeclarable(TD, Redecl);
651}
652
653ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
654 RedeclarableResult Redecl = VisitRedeclarable(TD);
655 VisitTypeDecl(TD);
656
657 TD->IdentifierNamespace = Record.readInt();
658 TD->setTagKind((TagDecl::TagKind)Record.readInt());
659 if (!isa<CXXRecordDecl>(TD))
660 TD->setCompleteDefinition(Record.readInt());
661 TD->setEmbeddedInDeclarator(Record.readInt());
662 TD->setFreeStanding(Record.readInt());
663 TD->setCompleteDefinitionRequired(Record.readInt());
664 TD->setBraceRange(ReadSourceRange());
665
666 switch (Record.readInt()) {
667 case 0:
668 break;
669 case 1: { // ExtInfo
670 TagDecl::ExtInfo *Info = new (Reader.getContext()) TagDecl::ExtInfo();
671 ReadQualifierInfo(*Info);
672 TD->TypedefNameDeclOrQualifier = Info;
673 break;
674 }
675 case 2: // TypedefNameForAnonDecl
676 NamedDeclForTagDecl = ReadDeclID();
677 TypedefNameForLinkage = Record.getIdentifierInfo();
678 break;
679 default:
680 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 680)
;
681 }
682
683 if (!isa<CXXRecordDecl>(TD))
684 mergeRedeclarable(TD, Redecl);
685 return Redecl;
686}
687
688void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
689 VisitTagDecl(ED);
690 if (TypeSourceInfo *TI = GetTypeSourceInfo())
691 ED->setIntegerTypeSourceInfo(TI);
692 else
693 ED->setIntegerType(Record.readType());
694 ED->setPromotionType(Record.readType());
695 ED->setNumPositiveBits(Record.readInt());
696 ED->setNumNegativeBits(Record.readInt());
697 ED->IsScoped = Record.readInt();
698 ED->IsScopedUsingClassTag = Record.readInt();
699 ED->IsFixed = Record.readInt();
700
701 // If this is a definition subject to the ODR, and we already have a
702 // definition, merge this one into it.
703 if (ED->IsCompleteDefinition &&
704 Reader.getContext().getLangOpts().Modules &&
705 Reader.getContext().getLangOpts().CPlusPlus) {
706 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
707 if (!OldDef) {
708 // This is the first time we've seen an imported definition. Look for a
709 // local definition before deciding that we are the first definition.
710 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
711 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
712 OldDef = D;
713 break;
714 }
715 }
716 }
717 if (OldDef) {
718 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
719 ED->IsCompleteDefinition = false;
720 Reader.mergeDefinitionVisibility(OldDef, ED);
721 } else {
722 OldDef = ED;
723 }
724 }
725
726 if (EnumDecl *InstED = ReadDeclAs<EnumDecl>()) {
727 TemplateSpecializationKind TSK =
728 (TemplateSpecializationKind)Record.readInt();
729 SourceLocation POI = ReadSourceLocation();
730 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
731 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
732 }
733}
734
735ASTDeclReader::RedeclarableResult
736ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
737 RedeclarableResult Redecl = VisitTagDecl(RD);
738 RD->setHasFlexibleArrayMember(Record.readInt());
739 RD->setAnonymousStructOrUnion(Record.readInt());
740 RD->setHasObjectMember(Record.readInt());
741 RD->setHasVolatileMember(Record.readInt());
742 return Redecl;
743}
744
745void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
746 VisitNamedDecl(VD);
747 VD->setType(Record.readType());
748}
749
750void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
751 VisitValueDecl(ECD);
752 if (Record.readInt())
753 ECD->setInitExpr(Record.readExpr());
754 ECD->setInitVal(Record.readAPSInt());
755 mergeMergeable(ECD);
756}
757
758void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
759 VisitValueDecl(DD);
760 DD->setInnerLocStart(ReadSourceLocation());
761 if (Record.readInt()) { // hasExtInfo
762 DeclaratorDecl::ExtInfo *Info
763 = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
764 ReadQualifierInfo(*Info);
765 DD->DeclInfo = Info;
766 }
767}
768
769void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
770 RedeclarableResult Redecl = VisitRedeclarable(FD);
771 VisitDeclaratorDecl(FD);
772
773 ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
774 FD->IdentifierNamespace = Record.readInt();
775
776 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
777 // after everything else is read.
778
779 FD->SClass = (StorageClass)Record.readInt();
780 FD->IsInline = Record.readInt();
781 FD->IsInlineSpecified = Record.readInt();
782 FD->IsExplicitSpecified = Record.readInt();
783 FD->IsVirtualAsWritten = Record.readInt();
784 FD->IsPure = Record.readInt();
785 FD->HasInheritedPrototype = Record.readInt();
786 FD->HasWrittenPrototype = Record.readInt();
787 FD->IsDeleted = Record.readInt();
788 FD->IsTrivial = Record.readInt();
789 FD->IsTrivialForCall = Record.readInt();
790 FD->IsDefaulted = Record.readInt();
791 FD->IsExplicitlyDefaulted = Record.readInt();
792 FD->HasImplicitReturnZero = Record.readInt();
793 FD->IsConstexpr = Record.readInt();
794 FD->UsesSEHTry = Record.readInt();
795 FD->HasSkippedBody = Record.readInt();
796 FD->IsMultiVersion = Record.readInt();
797 FD->IsLateTemplateParsed = Record.readInt();
798 FD->setCachedLinkage(Linkage(Record.readInt()));
799 FD->EndRangeLoc = ReadSourceLocation();
800
801 FD->ODRHash = Record.readInt();
802 FD->HasODRHash = true;
803
804 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
805 case FunctionDecl::TK_NonTemplate:
806 mergeRedeclarable(FD, Redecl);
807 break;
808 case FunctionDecl::TK_FunctionTemplate:
809 // Merged when we merge the template.
810 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
811 break;
812 case FunctionDecl::TK_MemberSpecialization: {
813 FunctionDecl *InstFD = ReadDeclAs<FunctionDecl>();
814 TemplateSpecializationKind TSK =
815 (TemplateSpecializationKind)Record.readInt();
816 SourceLocation POI = ReadSourceLocation();
817 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
818 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
819 mergeRedeclarable(FD, Redecl);
820 break;
821 }
822 case FunctionDecl::TK_FunctionTemplateSpecialization: {
823 FunctionTemplateDecl *Template = ReadDeclAs<FunctionTemplateDecl>();
824 TemplateSpecializationKind TSK =
825 (TemplateSpecializationKind)Record.readInt();
826
827 // Template arguments.
828 SmallVector<TemplateArgument, 8> TemplArgs;
829 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
830
831 // Template args as written.
832 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
833 SourceLocation LAngleLoc, RAngleLoc;
834 bool HasTemplateArgumentsAsWritten = Record.readInt();
835 if (HasTemplateArgumentsAsWritten) {
836 unsigned NumTemplateArgLocs = Record.readInt();
837 TemplArgLocs.reserve(NumTemplateArgLocs);
838 for (unsigned i=0; i != NumTemplateArgLocs; ++i)
839 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
840
841 LAngleLoc = ReadSourceLocation();
842 RAngleLoc = ReadSourceLocation();
843 }
844
845 SourceLocation POI = ReadSourceLocation();
846
847 ASTContext &C = Reader.getContext();
848 TemplateArgumentList *TemplArgList
849 = TemplateArgumentList::CreateCopy(C, TemplArgs);
850 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
851 for (unsigned i=0, e = TemplArgLocs.size(); i != e; ++i)
852 TemplArgsInfo.addArgument(TemplArgLocs[i]);
853 FunctionTemplateSpecializationInfo *FTInfo
854 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
855 TemplArgList,
856 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
857 : nullptr,
858 POI);
859 FD->TemplateOrSpecialization = FTInfo;
860
861 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
862 // The template that contains the specializations set. It's not safe to
863 // use getCanonicalDecl on Template since it may still be initializing.
864 FunctionTemplateDecl *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
865 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
866 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
867 // FunctionTemplateSpecializationInfo's Profile().
868 // We avoid getASTContext because a decl in the parent hierarchy may
869 // be initializing.
870 llvm::FoldingSetNodeID ID;
871 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
872 void *InsertPos = nullptr;
873 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
874 FunctionTemplateSpecializationInfo *ExistingInfo =
875 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
876 if (InsertPos)
877 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
878 else {
879 assert(Reader.getContext().getLangOpts().Modules &&(static_cast <bool> (Reader.getContext().getLangOpts().
Modules && "already deserialized this template specialization"
) ? void (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 880, __extension__ __PRETTY_FUNCTION__))
880 "already deserialized this template specialization")(static_cast <bool> (Reader.getContext().getLangOpts().
Modules && "already deserialized this template specialization"
) ? void (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 880, __extension__ __PRETTY_FUNCTION__))
;
881 mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
882 }
883 }
884 break;
885 }
886 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
887 // Templates.
888 UnresolvedSet<8> TemplDecls;
889 unsigned NumTemplates = Record.readInt();
890 while (NumTemplates--)
891 TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
892
893 // Templates args.
894 TemplateArgumentListInfo TemplArgs;
895 unsigned NumArgs = Record.readInt();
896 while (NumArgs--)
897 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
898 TemplArgs.setLAngleLoc(ReadSourceLocation());
899 TemplArgs.setRAngleLoc(ReadSourceLocation());
900
901 FD->setDependentTemplateSpecialization(Reader.getContext(),
902 TemplDecls, TemplArgs);
903 // These are not merged; we don't need to merge redeclarations of dependent
904 // template friends.
905 break;
906 }
907 }
908
909 // Read in the parameters.
910 unsigned NumParams = Record.readInt();
911 SmallVector<ParmVarDecl *, 16> Params;
912 Params.reserve(NumParams);
913 for (unsigned I = 0; I != NumParams; ++I)
914 Params.push_back(ReadDeclAs<ParmVarDecl>());
915 FD->setParams(Reader.getContext(), Params);
916}
917
918void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
919 VisitNamedDecl(MD);
920 if (Record.readInt()) {
921 // Load the body on-demand. Most clients won't care, because method
922 // definitions rarely show up in headers.
923 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
924 HasPendingBody = true;
925 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
926 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
927 }
928 MD->setInstanceMethod(Record.readInt());
929 MD->setVariadic(Record.readInt());
930 MD->setPropertyAccessor(Record.readInt());
931 MD->setDefined(Record.readInt());
932 MD->IsOverriding = Record.readInt();
933 MD->HasSkippedBody = Record.readInt();
934
935 MD->IsRedeclaration = Record.readInt();
936 MD->HasRedeclaration = Record.readInt();
937 if (MD->HasRedeclaration)
938 Reader.getContext().setObjCMethodRedeclaration(MD,
939 ReadDeclAs<ObjCMethodDecl>());
940
941 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
942 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
943 MD->SetRelatedResultType(Record.readInt());
944 MD->setReturnType(Record.readType());
945 MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
946 MD->DeclEndLoc = ReadSourceLocation();
947 unsigned NumParams = Record.readInt();
948 SmallVector<ParmVarDecl *, 16> Params;
949 Params.reserve(NumParams);
950 for (unsigned I = 0; I != NumParams; ++I)
951 Params.push_back(ReadDeclAs<ParmVarDecl>());
952
953 MD->SelLocsKind = Record.readInt();
954 unsigned NumStoredSelLocs = Record.readInt();
955 SmallVector<SourceLocation, 16> SelLocs;
956 SelLocs.reserve(NumStoredSelLocs);
957 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
958 SelLocs.push_back(ReadSourceLocation());
959
960 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
961}
962
963void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
964 VisitTypedefNameDecl(D);
965
966 D->Variance = Record.readInt();
967 D->Index = Record.readInt();
968 D->VarianceLoc = ReadSourceLocation();
969 D->ColonLoc = ReadSourceLocation();
970}
971
972void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
973 VisitNamedDecl(CD);
974 CD->setAtStartLoc(ReadSourceLocation());
975 CD->setAtEndRange(ReadSourceRange());
976}
977
978ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
979 unsigned numParams = Record.readInt();
980 if (numParams == 0)
981 return nullptr;
982
983 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
984 typeParams.reserve(numParams);
985 for (unsigned i = 0; i != numParams; ++i) {
986 auto typeParam = ReadDeclAs<ObjCTypeParamDecl>();
987 if (!typeParam)
988 return nullptr;
989
990 typeParams.push_back(typeParam);
991 }
992
993 SourceLocation lAngleLoc = ReadSourceLocation();
994 SourceLocation rAngleLoc = ReadSourceLocation();
995
996 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
997 typeParams, rAngleLoc);
998}
999
1000void ASTDeclReader::ReadObjCDefinitionData(
1001 struct ObjCInterfaceDecl::DefinitionData &Data) {
1002 // Read the superclass.
1003 Data.SuperClassTInfo = GetTypeSourceInfo();
1004
1005 Data.EndLoc = ReadSourceLocation();
1006 Data.HasDesignatedInitializers = Record.readInt();
1007
1008 // Read the directly referenced protocols and their SourceLocations.
1009 unsigned NumProtocols = Record.readInt();
1010 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1011 Protocols.reserve(NumProtocols);
1012 for (unsigned I = 0; I != NumProtocols; ++I)
1013 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1014 SmallVector<SourceLocation, 16> ProtoLocs;
1015 ProtoLocs.reserve(NumProtocols);
1016 for (unsigned I = 0; I != NumProtocols; ++I)
1017 ProtoLocs.push_back(ReadSourceLocation());
1018 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1019 Reader.getContext());
1020
1021 // Read the transitive closure of protocols referenced by this class.
1022 NumProtocols = Record.readInt();
1023 Protocols.clear();
1024 Protocols.reserve(NumProtocols);
1025 for (unsigned I = 0; I != NumProtocols; ++I)
1026 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1027 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1028 Reader.getContext());
1029}
1030
1031void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1032 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1033 // FIXME: odr checking?
1034}
1035
1036void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1037 RedeclarableResult Redecl = VisitRedeclarable(ID);
1038 VisitObjCContainerDecl(ID);
1039 TypeIDForTypeDecl = Record.getGlobalTypeID(Record.readInt());
1040 mergeRedeclarable(ID, Redecl);
1041
1042 ID->TypeParamList = ReadObjCTypeParamList();
1043 if (Record.readInt()) {
1044 // Read the definition.
1045 ID->allocateDefinitionData();
1046
1047 ReadObjCDefinitionData(ID->data());
1048 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1049 if (Canon->Data.getPointer()) {
1050 // If we already have a definition, keep the definition invariant and
1051 // merge the data.
1052 MergeDefinitionData(Canon, std::move(ID->data()));
1053 ID->Data = Canon->Data;
1054 } else {
1055 // Set the definition data of the canonical declaration, so other
1056 // redeclarations will see it.
1057 ID->getCanonicalDecl()->Data = ID->Data;
1058
1059 // We will rebuild this list lazily.
1060 ID->setIvarList(nullptr);
1061 }
1062
1063 // Note that we have deserialized a definition.
1064 Reader.PendingDefinitions.insert(ID);
1065
1066 // Note that we've loaded this Objective-C class.
1067 Reader.ObjCClassesLoaded.push_back(ID);
1068 } else {
1069 ID->Data = ID->getCanonicalDecl()->Data;
1070 }
1071}
1072
1073void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1074 VisitFieldDecl(IVD);
1075 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1076 // This field will be built lazily.
1077 IVD->setNextIvar(nullptr);
1078 bool synth = Record.readInt();
1079 IVD->setSynthesize(synth);
1080}
1081
1082void ASTDeclReader::ReadObjCDefinitionData(
1083 struct ObjCProtocolDecl::DefinitionData &Data) {
1084
1085 unsigned NumProtoRefs = Record.readInt();
1086 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1087 ProtoRefs.reserve(NumProtoRefs);
1088 for (unsigned I = 0; I != NumProtoRefs; ++I)
1089 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1090 SmallVector<SourceLocation, 16> ProtoLocs;
1091 ProtoLocs.reserve(NumProtoRefs);
1092 for (unsigned I = 0; I != NumProtoRefs; ++I)
1093 ProtoLocs.push_back(ReadSourceLocation());
1094 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1095 ProtoLocs.data(), Reader.getContext());
1096}
1097
1098void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1099 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1100 // FIXME: odr checking?
1101}
1102
1103void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1104 RedeclarableResult Redecl = VisitRedeclarable(PD);
1105 VisitObjCContainerDecl(PD);
1106 mergeRedeclarable(PD, Redecl);
1107
1108 if (Record.readInt()) {
1109 // Read the definition.
1110 PD->allocateDefinitionData();
1111
1112 ReadObjCDefinitionData(PD->data());
1113
1114 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1115 if (Canon->Data.getPointer()) {
1116 // If we already have a definition, keep the definition invariant and
1117 // merge the data.
1118 MergeDefinitionData(Canon, std::move(PD->data()));
1119 PD->Data = Canon->Data;
1120 } else {
1121 // Set the definition data of the canonical declaration, so other
1122 // redeclarations will see it.
1123 PD->getCanonicalDecl()->Data = PD->Data;
1124 }
1125 // Note that we have deserialized a definition.
1126 Reader.PendingDefinitions.insert(PD);
1127 } else {
1128 PD->Data = PD->getCanonicalDecl()->Data;
1129 }
1130}
1131
1132void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1133 VisitFieldDecl(FD);
1134}
1135
1136void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1137 VisitObjCContainerDecl(CD);
1138 CD->setCategoryNameLoc(ReadSourceLocation());
1139 CD->setIvarLBraceLoc(ReadSourceLocation());
1140 CD->setIvarRBraceLoc(ReadSourceLocation());
1141
1142 // Note that this category has been deserialized. We do this before
1143 // deserializing the interface declaration, so that it will consider this
1144 /// category.
1145 Reader.CategoriesDeserialized.insert(CD);
1146
1147 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1148 CD->TypeParamList = ReadObjCTypeParamList();
1149 unsigned NumProtoRefs = Record.readInt();
1150 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1151 ProtoRefs.reserve(NumProtoRefs);
1152 for (unsigned I = 0; I != NumProtoRefs; ++I)
1153 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1154 SmallVector<SourceLocation, 16> ProtoLocs;
1155 ProtoLocs.reserve(NumProtoRefs);
1156 for (unsigned I = 0; I != NumProtoRefs; ++I)
1157 ProtoLocs.push_back(ReadSourceLocation());
1158 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1159 Reader.getContext());
1160}
1161
1162void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1163 VisitNamedDecl(CAD);
1164 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1165}
1166
1167void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1168 VisitNamedDecl(D);
1169 D->setAtLoc(ReadSourceLocation());
1170 D->setLParenLoc(ReadSourceLocation());
1171 QualType T = Record.readType();
1172 TypeSourceInfo *TSI = GetTypeSourceInfo();
1173 D->setType(T, TSI);
1174 D->setPropertyAttributes(
1175 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1176 D->setPropertyAttributesAsWritten(
1177 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1178 D->setPropertyImplementation(
1179 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1180 DeclarationName GetterName = Record.readDeclarationName();
1181 SourceLocation GetterLoc = ReadSourceLocation();
1182 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1183 DeclarationName SetterName = Record.readDeclarationName();
1184 SourceLocation SetterLoc = ReadSourceLocation();
1185 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1186 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1187 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1188 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1189}
1190
1191void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1192 VisitObjCContainerDecl(D);
1193 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1194}
1195
1196void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1197 VisitObjCImplDecl(D);
1198 D->CategoryNameLoc = ReadSourceLocation();
1199}
1200
1201void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1202 VisitObjCImplDecl(D);
1203 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1204 D->SuperLoc = ReadSourceLocation();
1205 D->setIvarLBraceLoc(ReadSourceLocation());
1206 D->setIvarRBraceLoc(ReadSourceLocation());
1207 D->setHasNonZeroConstructors(Record.readInt());
1208 D->setHasDestructors(Record.readInt());
1209 D->NumIvarInitializers = Record.readInt();
1210 if (D->NumIvarInitializers)
1211 D->IvarInitializers = ReadGlobalOffset();
1212}
1213
1214void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1215 VisitDecl(D);
1216 D->setAtLoc(ReadSourceLocation());
1217 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1218 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1219 D->IvarLoc = ReadSourceLocation();
1220 D->setGetterCXXConstructor(Record.readExpr());
1221 D->setSetterCXXAssignment(Record.readExpr());
1222}
1223
1224void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1225 VisitDeclaratorDecl(FD);
1226 FD->Mutable = Record.readInt();
1227
1228 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1229 FD->InitStorage.setInt(ISK);
1230 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1231 ? Record.readType().getAsOpaquePtr()
1232 : Record.readExpr());
1233 }
1234
1235 if (auto *BW = Record.readExpr())
1236 FD->setBitWidth(BW);
1237
1238 if (!FD->getDeclName()) {
1239 if (FieldDecl *Tmpl = ReadDeclAs<FieldDecl>())
1240 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1241 }
1242 mergeMergeable(FD);
1243}
1244
1245void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1246 VisitDeclaratorDecl(PD);
1247 PD->GetterId = Record.getIdentifierInfo();
1248 PD->SetterId = Record.getIdentifierInfo();
1249}
1250
1251void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1252 VisitValueDecl(FD);
1253
1254 FD->ChainingSize = Record.readInt();
1255 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2")(static_cast <bool> (FD->ChainingSize >= 2 &&
"Anonymous chaining must be >= 2") ? void (0) : __assert_fail
("FD->ChainingSize >= 2 && \"Anonymous chaining must be >= 2\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1255, __extension__ __PRETTY_FUNCTION__))
;
1256 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1257
1258 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1259 FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1260
1261 mergeMergeable(FD);
1262}
1263
1264ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1265 RedeclarableResult Redecl = VisitRedeclarable(VD);
1266 VisitDeclaratorDecl(VD);
1267
1268 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1269 VD->VarDeclBits.TSCSpec = Record.readInt();
1270 VD->VarDeclBits.InitStyle = Record.readInt();
1271 if (!isa<ParmVarDecl>(VD)) {
1272 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1273 Record.readInt();
1274 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1275 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1276 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1277 VD->NonParmVarDeclBits.ARCPseudoStrong = Record.readInt();
1278 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1279 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1280 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1281 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1282 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1283 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1284 }
1285 Linkage VarLinkage = Linkage(Record.readInt());
1286 VD->setCachedLinkage(VarLinkage);
1287
1288 // Reconstruct the one piece of the IdentifierNamespace that we need.
1289 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1290 VD->getLexicalDeclContext()->isFunctionOrMethod())
1291 VD->setLocalExternDecl();
1292
1293 if (uint64_t Val = Record.readInt()) {
1294 VD->setInit(Record.readExpr());
1295 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1296 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1297 Eval->CheckedICE = true;
1298 Eval->IsICE = Val == 3;
1299 }
1300 }
1301
1302 if (VD->getStorageDuration() == SD_Static && Record.readInt())
1303 Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1304
1305 enum VarKind {
1306 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1307 };
1308 switch ((VarKind)Record.readInt()) {
1309 case VarNotTemplate:
1310 // Only true variables (not parameters or implicit parameters) can be
1311 // merged; the other kinds are not really redeclarable at all.
1312 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1313 !isa<VarTemplateSpecializationDecl>(VD))
1314 mergeRedeclarable(VD, Redecl);
1315 break;
1316 case VarTemplate:
1317 // Merged when we merge the template.
1318 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1319 break;
1320 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1321 VarDecl *Tmpl = ReadDeclAs<VarDecl>();
1322 TemplateSpecializationKind TSK =
1323 (TemplateSpecializationKind)Record.readInt();
1324 SourceLocation POI = ReadSourceLocation();
1325 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1326 mergeRedeclarable(VD, Redecl);
1327 break;
1328 }
1329 }
1330
1331 return Redecl;
1332}
1333
1334void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1335 VisitVarDecl(PD);
1336}
1337
1338void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1339 VisitVarDecl(PD);
1340 unsigned isObjCMethodParam = Record.readInt();
1341 unsigned scopeDepth = Record.readInt();
1342 unsigned scopeIndex = Record.readInt();
1343 unsigned declQualifier = Record.readInt();
1344 if (isObjCMethodParam) {
1345 assert(scopeDepth == 0)(static_cast <bool> (scopeDepth == 0) ? void (0) : __assert_fail
("scopeDepth == 0", "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1345, __extension__ __PRETTY_FUNCTION__))
;
1346 PD->setObjCMethodScopeInfo(scopeIndex);
1347 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1348 } else {
1349 PD->setScopeInfo(scopeDepth, scopeIndex);
1350 }
1351 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1352 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1353 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1354 PD->setUninstantiatedDefaultArg(Record.readExpr());
1355
1356 // FIXME: If this is a redeclaration of a function from another module, handle
1357 // inheritance of default arguments.
1358}
1359
1360void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1361 VisitVarDecl(DD);
1362 BindingDecl **BDs = DD->getTrailingObjects<BindingDecl*>();
1363 for (unsigned I = 0; I != DD->NumBindings; ++I)
1364 BDs[I] = ReadDeclAs<BindingDecl>();
1365}
1366
1367void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1368 VisitValueDecl(BD);
1369 BD->Binding = Record.readExpr();
1370}
1371
1372void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1373 VisitDecl(AD);
1374 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1375 AD->setRParenLoc(ReadSourceLocation());
1376}
1377
1378void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1379 VisitDecl(BD);
1380 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1381 BD->setSignatureAsWritten(GetTypeSourceInfo());
1382 unsigned NumParams = Record.readInt();
1383 SmallVector<ParmVarDecl *, 16> Params;
1384 Params.reserve(NumParams);
1385 for (unsigned I = 0; I != NumParams; ++I)
1386 Params.push_back(ReadDeclAs<ParmVarDecl>());
1387 BD->setParams(Params);
1388
1389 BD->setIsVariadic(Record.readInt());
1390 BD->setBlockMissingReturnType(Record.readInt());
1391 BD->setIsConversionFromLambda(Record.readInt());
1392
1393 bool capturesCXXThis = Record.readInt();
1394 unsigned numCaptures = Record.readInt();
1395 SmallVector<BlockDecl::Capture, 16> captures;
1396 captures.reserve(numCaptures);
1397 for (unsigned i = 0; i != numCaptures; ++i) {
1398 VarDecl *decl = ReadDeclAs<VarDecl>();
1399 unsigned flags = Record.readInt();
1400 bool byRef = (flags & 1);
1401 bool nested = (flags & 2);
1402 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1403
1404 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1405 }
1406 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1407}
1408
1409void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1410 VisitDecl(CD);
1411 unsigned ContextParamPos = Record.readInt();
1412 CD->setNothrow(Record.readInt() != 0);
1413 // Body is set by VisitCapturedStmt.
1414 for (unsigned I = 0; I < CD->NumParams; ++I) {
1415 if (I != ContextParamPos)
1416 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1417 else
1418 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1419 }
1420}
1421
1422void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1423 VisitDecl(D);
1424 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1425 D->setExternLoc(ReadSourceLocation());
1426 D->setRBraceLoc(ReadSourceLocation());
1427}
1428
1429void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1430 VisitDecl(D);
1431 D->RBraceLoc = ReadSourceLocation();
1432}
1433
1434void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1435 VisitNamedDecl(D);
1436 D->setLocStart(ReadSourceLocation());
1437}
1438
1439void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1440 RedeclarableResult Redecl = VisitRedeclarable(D);
1441 VisitNamedDecl(D);
1442 D->setInline(Record.readInt());
1443 D->LocStart = ReadSourceLocation();
1444 D->RBraceLoc = ReadSourceLocation();
1445
1446 // Defer loading the anonymous namespace until we've finished merging
1447 // this namespace; loading it might load a later declaration of the
1448 // same namespace, and we have an invariant that older declarations
1449 // get merged before newer ones try to merge.
1450 GlobalDeclID AnonNamespace = 0;
1451 if (Redecl.getFirstID() == ThisDeclID) {
1452 AnonNamespace = ReadDeclID();
1453 } else {
1454 // Link this namespace back to the first declaration, which has already
1455 // been deserialized.
1456 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1457 }
1458
1459 mergeRedeclarable(D, Redecl);
1460
1461 if (AnonNamespace) {
1462 // Each module has its own anonymous namespace, which is disjoint from
1463 // any other module's anonymous namespaces, so don't attach the anonymous
1464 // namespace at all.
1465 NamespaceDecl *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1466 if (!Record.isModule())
1467 D->setAnonymousNamespace(Anon);
1468 }
1469}
1470
1471void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1472 RedeclarableResult Redecl = VisitRedeclarable(D);
1473 VisitNamedDecl(D);
1474 D->NamespaceLoc = ReadSourceLocation();
1475 D->IdentLoc = ReadSourceLocation();
1476 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1477 D->Namespace = ReadDeclAs<NamedDecl>();
1478 mergeRedeclarable(D, Redecl);
1479}
1480
1481void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1482 VisitNamedDecl(D);
1483 D->setUsingLoc(ReadSourceLocation());
1484 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1485 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1486 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1487 D->setTypename(Record.readInt());
1488 if (NamedDecl *Pattern = ReadDeclAs<NamedDecl>())
1489 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1490 mergeMergeable(D);
1491}
1492
1493void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1494 VisitNamedDecl(D);
1495 D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1496 NamedDecl **Expansions = D->getTrailingObjects<NamedDecl*>();
1497 for (unsigned I = 0; I != D->NumExpansions; ++I)
1498 Expansions[I] = ReadDeclAs<NamedDecl>();
1499 mergeMergeable(D);
1500}
1501
1502void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1503 RedeclarableResult Redecl = VisitRedeclarable(D);
1504 VisitNamedDecl(D);
1505 D->Underlying = ReadDeclAs<NamedDecl>();
1506 D->IdentifierNamespace = Record.readInt();
1507 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1508 UsingShadowDecl *Pattern = ReadDeclAs<UsingShadowDecl>();
1509 if (Pattern)
1510 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1511 mergeRedeclarable(D, Redecl);
1512}
1513
1514void ASTDeclReader::VisitConstructorUsingShadowDecl(
1515 ConstructorUsingShadowDecl *D) {
1516 VisitUsingShadowDecl(D);
1517 D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1518 D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1519 D->IsVirtual = Record.readInt();
1520}
1521
1522void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1523 VisitNamedDecl(D);
1524 D->UsingLoc = ReadSourceLocation();
1525 D->NamespaceLoc = ReadSourceLocation();
1526 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1527 D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1528 D->CommonAncestor = ReadDeclAs<DeclContext>();
1529}
1530
1531void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1532 VisitValueDecl(D);
1533 D->setUsingLoc(ReadSourceLocation());
1534 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1535 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1536 D->EllipsisLoc = ReadSourceLocation();
1537 mergeMergeable(D);
1538}
1539
1540void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1541 UnresolvedUsingTypenameDecl *D) {
1542 VisitTypeDecl(D);
1543 D->TypenameLocation = ReadSourceLocation();
1544 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1545 D->EllipsisLoc = ReadSourceLocation();
1546 mergeMergeable(D);
1547}
1548
1549void ASTDeclReader::ReadCXXDefinitionData(
1550 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1551 // Note: the caller has deserialized the IsLambda bit already.
1552 Data.UserDeclaredConstructor = Record.readInt();
1553 Data.UserDeclaredSpecialMembers = Record.readInt();
1554 Data.Aggregate = Record.readInt();
1555 Data.PlainOldData = Record.readInt();
1556 Data.Empty = Record.readInt();
1557 Data.Polymorphic = Record.readInt();
1558 Data.Abstract = Record.readInt();
1559 Data.IsStandardLayout = Record.readInt();
1560 Data.HasNoNonEmptyBases = Record.readInt();
1561 Data.HasPrivateFields = Record.readInt();
1562 Data.HasProtectedFields = Record.readInt();
1563 Data.HasPublicFields = Record.readInt();
1564 Data.HasMutableFields = Record.readInt();
1565 Data.HasVariantMembers = Record.readInt();
1566 Data.HasOnlyCMembers = Record.readInt();
1567 Data.HasInClassInitializer = Record.readInt();
1568 Data.HasUninitializedReferenceMember = Record.readInt();
1569 Data.HasUninitializedFields = Record.readInt();
1570 Data.HasInheritedConstructor = Record.readInt();
1571 Data.HasInheritedAssignment = Record.readInt();
1572 Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1573 Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1574 Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1575 Data.NeedOverloadResolutionForDestructor = Record.readInt();
1576 Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1577 Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1578 Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1579 Data.DefaultedDestructorIsDeleted = Record.readInt();
1580 Data.HasTrivialSpecialMembers = Record.readInt();
1581 Data.HasTrivialSpecialMembersForCall = Record.readInt();
1582 Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1583 Data.DeclaredNonTrivialSpecialMembersForCall = Record.readInt();
1584 Data.HasIrrelevantDestructor = Record.readInt();
1585 Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1586 Data.HasDefaultedDefaultConstructor = Record.readInt();
1587 Data.CanPassInRegisters = Record.readInt();
1588 Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1589 Data.HasConstexprDefaultConstructor = Record.readInt();
1590 Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1591 Data.ComputedVisibleConversions = Record.readInt();
1592 Data.UserProvidedDefaultConstructor = Record.readInt();
1593 Data.DeclaredSpecialMembers = Record.readInt();
1594 Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1595 Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1596 Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1597 Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1598 Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1599 Data.ODRHash = Record.readInt();
1600 Data.HasODRHash = true;
1601
1602 if (Record.readInt())
1603 Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1604
1605 Data.NumBases = Record.readInt();
1606 if (Data.NumBases)
1607 Data.Bases = ReadGlobalOffset();
1608 Data.NumVBases = Record.readInt();
1609 if (Data.NumVBases)
1610 Data.VBases = ReadGlobalOffset();
1611
1612 Record.readUnresolvedSet(Data.Conversions);
1613 Record.readUnresolvedSet(Data.VisibleConversions);
1614 assert(Data.Definition && "Data.Definition should be already set!")(static_cast <bool> (Data.Definition && "Data.Definition should be already set!"
) ? void (0) : __assert_fail ("Data.Definition && \"Data.Definition should be already set!\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1614, __extension__ __PRETTY_FUNCTION__))
;
1615 Data.FirstFriend = ReadDeclID();
1616
1617 if (Data.IsLambda) {
1618 typedef LambdaCapture Capture;
1619 CXXRecordDecl::LambdaDefinitionData &Lambda
1620 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1621 Lambda.Dependent = Record.readInt();
1622 Lambda.IsGenericLambda = Record.readInt();
1623 Lambda.CaptureDefault = Record.readInt();
1624 Lambda.NumCaptures = Record.readInt();
1625 Lambda.NumExplicitCaptures = Record.readInt();
1626 Lambda.ManglingNumber = Record.readInt();
1627 Lambda.ContextDecl = ReadDeclID();
1628 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1629 sizeof(Capture) * Lambda.NumCaptures);
1630 Capture *ToCapture = Lambda.Captures;
1631 Lambda.MethodTyInfo = GetTypeSourceInfo();
1632 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1633 SourceLocation Loc = ReadSourceLocation();
1634 bool IsImplicit = Record.readInt();
1635 LambdaCaptureKind Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1636 switch (Kind) {
1637 case LCK_StarThis:
1638 case LCK_This:
1639 case LCK_VLAType:
1640 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1641 break;
1642 case LCK_ByCopy:
1643 case LCK_ByRef:
1644 VarDecl *Var = ReadDeclAs<VarDecl>();
1645 SourceLocation EllipsisLoc = ReadSourceLocation();
1646 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1647 break;
1648 }
1649 }
1650 }
1651}
1652
1653void ASTDeclReader::MergeDefinitionData(
1654 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1655 assert(D->DefinitionData &&(static_cast <bool> (D->DefinitionData && "merging class definition into non-definition"
) ? void (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1656, __extension__ __PRETTY_FUNCTION__))
1656 "merging class definition into non-definition")(static_cast <bool> (D->DefinitionData && "merging class definition into non-definition"
) ? void (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1656, __extension__ __PRETTY_FUNCTION__))
;
1657 auto &DD = *D->DefinitionData;
1658
1659 if (DD.Definition != MergeDD.Definition) {
1660 // Track that we merged the definitions.
1661 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1662 DD.Definition));
1663 Reader.PendingDefinitions.erase(MergeDD.Definition);
1664 MergeDD.Definition->IsCompleteDefinition = false;
1665 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1666 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&(static_cast <bool> (Reader.Lookups.find(MergeDD.Definition
) == Reader.Lookups.end() && "already loaded pending lookups for merged definition"
) ? void (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1667, __extension__ __PRETTY_FUNCTION__))
1667 "already loaded pending lookups for merged definition")(static_cast <bool> (Reader.Lookups.find(MergeDD.Definition
) == Reader.Lookups.end() && "already loaded pending lookups for merged definition"
) ? void (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1667, __extension__ __PRETTY_FUNCTION__))
;
1668 }
1669
1670 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1671 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1672 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1673 // We faked up this definition data because we found a class for which we'd
1674 // not yet loaded the definition. Replace it with the real thing now.
1675 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?")(static_cast <bool> (!DD.IsLambda && !MergeDD.IsLambda
&& "faked up lambda definition?") ? void (0) : __assert_fail
("!DD.IsLambda && !MergeDD.IsLambda && \"faked up lambda definition?\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1675, __extension__ __PRETTY_FUNCTION__))
;
1676 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1677
1678 // Don't change which declaration is the definition; that is required
1679 // to be invariant once we select it.
1680 auto *Def = DD.Definition;
1681 DD = std::move(MergeDD);
1682 DD.Definition = Def;
1683 return;
1684 }
1685
1686 // FIXME: Move this out into a .def file?
1687 bool DetectedOdrViolation = false;
1688#define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1689#define MATCH_FIELD(Field) \
1690 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1691 OR_FIELD(Field)
1692 MATCH_FIELD(UserDeclaredConstructor)
1693 MATCH_FIELD(UserDeclaredSpecialMembers)
1694 MATCH_FIELD(Aggregate)
1695 MATCH_FIELD(PlainOldData)
1696 MATCH_FIELD(Empty)
1697 MATCH_FIELD(Polymorphic)
1698 MATCH_FIELD(Abstract)
1699 MATCH_FIELD(IsStandardLayout)
1700 MATCH_FIELD(HasNoNonEmptyBases)
1701 MATCH_FIELD(HasPrivateFields)
1702 MATCH_FIELD(HasProtectedFields)
1703 MATCH_FIELD(HasPublicFields)
1704 MATCH_FIELD(HasMutableFields)
1705 MATCH_FIELD(HasVariantMembers)
1706 MATCH_FIELD(HasOnlyCMembers)
1707 MATCH_FIELD(HasInClassInitializer)
1708 MATCH_FIELD(HasUninitializedReferenceMember)
1709 MATCH_FIELD(HasUninitializedFields)
1710 MATCH_FIELD(HasInheritedConstructor)
1711 MATCH_FIELD(HasInheritedAssignment)
1712 MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1713 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1714 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1715 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1716 MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1717 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1718 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1719 MATCH_FIELD(DefaultedDestructorIsDeleted)
1720 OR_FIELD(HasTrivialSpecialMembers)
1721 OR_FIELD(HasTrivialSpecialMembersForCall)
1722 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1723 OR_FIELD(DeclaredNonTrivialSpecialMembersForCall)
1724 MATCH_FIELD(HasIrrelevantDestructor)
1725 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1726 OR_FIELD(HasDefaultedDefaultConstructor)
1727 MATCH_FIELD(CanPassInRegisters)
1728 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1729 OR_FIELD(HasConstexprDefaultConstructor)
1730 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1731 // ComputedVisibleConversions is handled below.
1732 MATCH_FIELD(UserProvidedDefaultConstructor)
1733 OR_FIELD(DeclaredSpecialMembers)
1734 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1735 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1736 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1737 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1738 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1739 MATCH_FIELD(IsLambda)
1740#undef OR_FIELD
1741#undef MATCH_FIELD
1742
1743 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1744 DetectedOdrViolation = true;
1745 // FIXME: Issue a diagnostic if the base classes don't match when we come
1746 // to lazily load them.
1747
1748 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1749 // match when we come to lazily load them.
1750 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1751 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1752 DD.ComputedVisibleConversions = true;
1753 }
1754
1755 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1756 // lazily load it.
1757
1758 if (DD.IsLambda) {
1759 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1760 // when they occur within the body of a function template specialization).
1761 }
1762
1763 if (D->getODRHash() != MergeDD.ODRHash) {
1764 DetectedOdrViolation = true;
1765 }
1766
1767 if (DetectedOdrViolation)
1768 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1769 {MergeDD.Definition, &MergeDD});
1770}
1771
1772void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1773 struct CXXRecordDecl::DefinitionData *DD;
1774 ASTContext &C = Reader.getContext();
1775
1776 // Determine whether this is a lambda closure type, so that we can
1777 // allocate the appropriate DefinitionData structure.
1778 bool IsLambda = Record.readInt();
1779 if (IsLambda)
1780 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1781 LCD_None);
1782 else
1783 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1784
1785 ReadCXXDefinitionData(*DD, D);
1786
1787 // We might already have a definition for this record. This can happen either
1788 // because we're reading an update record, or because we've already done some
1789 // merging. Either way, just merge into it.
1790 CXXRecordDecl *Canon = D->getCanonicalDecl();
1791 if (Canon->DefinitionData) {
1792 MergeDefinitionData(Canon, std::move(*DD));
1793 D->DefinitionData = Canon->DefinitionData;
1794 return;
1795 }
1796
1797 // Mark this declaration as being a definition.
1798 D->IsCompleteDefinition = true;
1799 D->DefinitionData = DD;
1800
1801 // If this is not the first declaration or is an update record, we can have
1802 // other redeclarations already. Make a note that we need to propagate the
1803 // DefinitionData pointer onto them.
1804 if (Update || Canon != D) {
1805 Canon->DefinitionData = D->DefinitionData;
1806 Reader.PendingDefinitions.insert(D);
1807 }
1808}
1809
1810ASTDeclReader::RedeclarableResult
1811ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1812 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1813
1814 ASTContext &C = Reader.getContext();
1815
1816 enum CXXRecKind {
1817 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1818 };
1819 switch ((CXXRecKind)Record.readInt()) {
1820 case CXXRecNotTemplate:
1821 // Merged when we merge the folding set entry in the primary template.
1822 if (!isa<ClassTemplateSpecializationDecl>(D))
1823 mergeRedeclarable(D, Redecl);
1824 break;
1825 case CXXRecTemplate: {
1826 // Merged when we merge the template.
1827 ClassTemplateDecl *Template = ReadDeclAs<ClassTemplateDecl>();
1828 D->TemplateOrInstantiation = Template;
1829 if (!Template->getTemplatedDecl()) {
1830 // We've not actually loaded the ClassTemplateDecl yet, because we're
1831 // currently being loaded as its pattern. Rely on it to set up our
1832 // TypeForDecl (see VisitClassTemplateDecl).
1833 //
1834 // Beware: we do not yet know our canonical declaration, and may still
1835 // get merged once the surrounding class template has got off the ground.
1836 TypeIDForTypeDecl = 0;
1837 }
1838 break;
1839 }
1840 case CXXRecMemberSpecialization: {
1841 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>();
1842 TemplateSpecializationKind TSK =
1843 (TemplateSpecializationKind)Record.readInt();
1844 SourceLocation POI = ReadSourceLocation();
1845 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1846 MSI->setPointOfInstantiation(POI);
1847 D->TemplateOrInstantiation = MSI;
1848 mergeRedeclarable(D, Redecl);
1849 break;
1850 }
1851 }
1852
1853 bool WasDefinition = Record.readInt();
1854 if (WasDefinition)
1855 ReadCXXRecordDefinition(D, /*Update*/false);
1856 else
1857 // Propagate DefinitionData pointer from the canonical declaration.
1858 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1859
1860 // Lazily load the key function to avoid deserializing every method so we can
1861 // compute it.
1862 if (WasDefinition) {
1863 DeclID KeyFn = ReadDeclID();
1864 if (KeyFn && D->IsCompleteDefinition)
1865 // FIXME: This is wrong for the ARM ABI, where some other module may have
1866 // made this function no longer be a key function. We need an update
1867 // record or similar for that case.
1868 C.KeyFunctions[D] = KeyFn;
1869 }
1870
1871 return Redecl;
1872}
1873
1874void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1875 VisitFunctionDecl(D);
1876 D->IsCopyDeductionCandidate = Record.readInt();
1877}
1878
1879void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1880 VisitFunctionDecl(D);
1881
1882 unsigned NumOverridenMethods = Record.readInt();
1883 if (D->isCanonicalDecl()) {
1884 while (NumOverridenMethods--) {
1885 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1886 // MD may be initializing.
1887 if (CXXMethodDecl *MD = ReadDeclAs<CXXMethodDecl>())
1888 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1889 }
1890 } else {
1891 // We don't care about which declarations this used to override; we get
1892 // the relevant information from the canonical declaration.
1893 Record.skipInts(NumOverridenMethods);
1894 }
1895}
1896
1897void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1898 // We need the inherited constructor information to merge the declaration,
1899 // so we have to read it before we call VisitCXXMethodDecl.
1900 if (D->isInheritingConstructor()) {
1901 auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1902 auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1903 *D->getTrailingObjects<InheritedConstructor>() =
1904 InheritedConstructor(Shadow, Ctor);
1905 }
1906
1907 VisitCXXMethodDecl(D);
1908}
1909
1910void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1911 VisitCXXMethodDecl(D);
1912
1913 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
1914 auto *Canon = cast<CXXDestructorDecl>(D->getCanonicalDecl());
1915 auto *ThisArg = Record.readExpr();
1916 // FIXME: Check consistency if we have an old and new operator delete.
1917 if (!Canon->OperatorDelete) {
1918 Canon->OperatorDelete = OperatorDelete;
1919 Canon->OperatorDeleteThisArg = ThisArg;
1920 }
1921 }
1922}
1923
1924void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1925 VisitCXXMethodDecl(D);
1926}
1927
1928void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1929 VisitDecl(D);
1930 D->ImportedAndComplete.setPointer(readModule());
1931 D->ImportedAndComplete.setInt(Record.readInt());
1932 SourceLocation *StoredLocs = D->getTrailingObjects<SourceLocation>();
1933 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1934 StoredLocs[I] = ReadSourceLocation();
1935 Record.skipInts(1); // The number of stored source locations.
1936}
1937
1938void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1939 VisitDecl(D);
1940 D->setColonLoc(ReadSourceLocation());
1941}
1942
1943void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1944 VisitDecl(D);
1945 if (Record.readInt()) // hasFriendDecl
1946 D->Friend = ReadDeclAs<NamedDecl>();
1947 else
1948 D->Friend = GetTypeSourceInfo();
1949 for (unsigned i = 0; i != D->NumTPLists; ++i)
1950 D->getTrailingObjects<TemplateParameterList *>()[i] =
1951 Record.readTemplateParameterList();
1952 D->NextFriend = ReadDeclID();
1953 D->UnsupportedFriend = (Record.readInt() != 0);
1954 D->FriendLoc = ReadSourceLocation();
1955}
1956
1957void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1958 VisitDecl(D);
1959 unsigned NumParams = Record.readInt();
1960 D->NumParams = NumParams;
1961 D->Params = new TemplateParameterList*[NumParams];
1962 for (unsigned i = 0; i != NumParams; ++i)
1963 D->Params[i] = Record.readTemplateParameterList();
1964 if (Record.readInt()) // HasFriendDecl
1965 D->Friend = ReadDeclAs<NamedDecl>();
1966 else
1967 D->Friend = GetTypeSourceInfo();
1968 D->FriendLoc = ReadSourceLocation();
1969}
1970
1971DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
1972 VisitNamedDecl(D);
1973
1974 DeclID PatternID = ReadDeclID();
1975 NamedDecl *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
1976 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
1977 // FIXME handle associated constraints
1978 D->init(TemplatedDecl, TemplateParams);
1979
1980 return PatternID;
1981}
1982
1983ASTDeclReader::RedeclarableResult
1984ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1985 RedeclarableResult Redecl = VisitRedeclarable(D);
1986
1987 // Make sure we've allocated the Common pointer first. We do this before
1988 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
1989 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
1990 if (!CanonD->Common) {
1991 CanonD->Common = CanonD->newCommon(Reader.getContext());
1992 Reader.PendingDefinitions.insert(CanonD);
1993 }
1994 D->Common = CanonD->Common;
1995
1996 // If this is the first declaration of the template, fill in the information
1997 // for the 'common' pointer.
1998 if (ThisDeclID == Redecl.getFirstID()) {
1999 if (RedeclarableTemplateDecl *RTD
2000 = ReadDeclAs<RedeclarableTemplateDecl>()) {
2001 assert(RTD->getKind() == D->getKind() &&(static_cast <bool> (RTD->getKind() == D->getKind
() && "InstantiatedFromMemberTemplate kind mismatch")
? void (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2002, __extension__ __PRETTY_FUNCTION__))
2002 "InstantiatedFromMemberTemplate kind mismatch")(static_cast <bool> (RTD->getKind() == D->getKind
() && "InstantiatedFromMemberTemplate kind mismatch")
? void (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2002, __extension__ __PRETTY_FUNCTION__))
;
2003 D->setInstantiatedFromMemberTemplate(RTD);
2004 if (Record.readInt())
2005 D->setMemberSpecialization();
2006 }
2007 }
2008
2009 DeclID PatternID = VisitTemplateDecl(D);
2010 D->IdentifierNamespace = Record.readInt();
2011
2012 mergeRedeclarable(D, Redecl, PatternID);
2013
2014 // If we merged the template with a prior declaration chain, merge the common
2015 // pointer.
2016 // FIXME: Actually merge here, don't just overwrite.
2017 D->Common = D->getCanonicalDecl()->Common;
2018
2019 return Redecl;
2020}
2021
2022void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2023 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2024
2025 if (ThisDeclID == Redecl.getFirstID()) {
2026 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2027 // the specializations.
2028 SmallVector<serialization::DeclID, 32> SpecIDs;
2029 ReadDeclIDList(SpecIDs);
2030 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2031 }
2032
2033 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2034 // We were loaded before our templated declaration was. We've not set up
2035 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2036 // it now.
2037 Reader.getContext().getInjectedClassNameType(
2038 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2039 }
2040}
2041
2042void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2043 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2043)
;
2044}
2045
2046/// TODO: Unify with ClassTemplateDecl version?
2047/// May require unifying ClassTemplateDecl and
2048/// VarTemplateDecl beyond TemplateDecl...
2049void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2050 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2051
2052 if (ThisDeclID == Redecl.getFirstID()) {
2053 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2054 // the specializations.
2055 SmallVector<serialization::DeclID, 32> SpecIDs;
2056 ReadDeclIDList(SpecIDs);
2057 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2058 }
2059}
2060
2061ASTDeclReader::RedeclarableResult
2062ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2063 ClassTemplateSpecializationDecl *D) {
2064 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2065
2066 ASTContext &C = Reader.getContext();
2067 if (Decl *InstD = ReadDecl()) {
2068 if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2069 D->SpecializedTemplate = CTD;
2070 } else {
2071 SmallVector<TemplateArgument, 8> TemplArgs;
2072 Record.readTemplateArgumentList(TemplArgs);
2073 TemplateArgumentList *ArgList
2074 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2075 ClassTemplateSpecializationDecl::SpecializedPartialSpecialization *PS
2076 = new (C) ClassTemplateSpecializationDecl::
2077 SpecializedPartialSpecialization();
2078 PS->PartialSpecialization
2079 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2080 PS->TemplateArgs = ArgList;
2081 D->SpecializedTemplate = PS;
2082 }
2083 }
2084
2085 SmallVector<TemplateArgument, 8> TemplArgs;
2086 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2087 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2088 D->PointOfInstantiation = ReadSourceLocation();
2089 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2090
2091 bool writtenAsCanonicalDecl = Record.readInt();
2092 if (writtenAsCanonicalDecl) {
2093 ClassTemplateDecl *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2094 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2095 // Set this as, or find, the canonical declaration for this specialization
2096 ClassTemplateSpecializationDecl *CanonSpec;
2097 if (ClassTemplatePartialSpecializationDecl *Partial =
2098 dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2099 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2100 .GetOrInsertNode(Partial);
2101 } else {
2102 CanonSpec =
2103 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2104 }
2105 // If there was already a canonical specialization, merge into it.
2106 if (CanonSpec != D) {
2107 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2108
2109 // This declaration might be a definition. Merge with any existing
2110 // definition.
2111 if (auto *DDD = D->DefinitionData) {
2112 if (CanonSpec->DefinitionData)
2113 MergeDefinitionData(CanonSpec, std::move(*DDD));
2114 else
2115 CanonSpec->DefinitionData = D->DefinitionData;
2116 }
2117 D->DefinitionData = CanonSpec->DefinitionData;
2118 }
2119 }
2120 }
2121
2122 // Explicit info.
2123 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2124 ClassTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo
2125 = new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2126 ExplicitInfo->TypeAsWritten = TyInfo;
2127 ExplicitInfo->ExternLoc = ReadSourceLocation();
2128 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2129 D->ExplicitInfo = ExplicitInfo;
2130 }
2131
2132 return Redecl;
2133}
2134
2135void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2136 ClassTemplatePartialSpecializationDecl *D) {
2137 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2138
2139 D->TemplateParams = Record.readTemplateParameterList();
2140 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2141
2142 // These are read/set from/to the first declaration.
2143 if (ThisDeclID == Redecl.getFirstID()) {
2144 D->InstantiatedFromMember.setPointer(
2145 ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2146 D->InstantiatedFromMember.setInt(Record.readInt());
2147 }
2148}
2149
2150void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2151 ClassScopeFunctionSpecializationDecl *D) {
2152 VisitDecl(D);
2153 D->Specialization = ReadDeclAs<CXXMethodDecl>();
2154}
2155
2156void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2157 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2158
2159 if (ThisDeclID == Redecl.getFirstID()) {
2160 // This FunctionTemplateDecl owns a CommonPtr; read it.
2161 SmallVector<serialization::DeclID, 32> SpecIDs;
2162 ReadDeclIDList(SpecIDs);
2163 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2164 }
2165}
2166
2167/// TODO: Unify with ClassTemplateSpecializationDecl version?
2168/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2169/// VarTemplate(Partial)SpecializationDecl with a new data
2170/// structure Template(Partial)SpecializationDecl, and
2171/// using Template(Partial)SpecializationDecl as input type.
2172ASTDeclReader::RedeclarableResult
2173ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2174 VarTemplateSpecializationDecl *D) {
2175 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2176
2177 ASTContext &C = Reader.getContext();
2178 if (Decl *InstD = ReadDecl()) {
2179 if (VarTemplateDecl *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2180 D->SpecializedTemplate = VTD;
2181 } else {
2182 SmallVector<TemplateArgument, 8> TemplArgs;
2183 Record.readTemplateArgumentList(TemplArgs);
2184 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2185 C, TemplArgs);
2186 VarTemplateSpecializationDecl::SpecializedPartialSpecialization *PS =
2187 new (C)
2188 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2189 PS->PartialSpecialization =
2190 cast<VarTemplatePartialSpecializationDecl>(InstD);
2191 PS->TemplateArgs = ArgList;
2192 D->SpecializedTemplate = PS;
2193 }
2194 }
2195
2196 // Explicit info.
2197 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2198 VarTemplateSpecializationDecl::ExplicitSpecializationInfo *ExplicitInfo =
2199 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2200 ExplicitInfo->TypeAsWritten = TyInfo;
2201 ExplicitInfo->ExternLoc = ReadSourceLocation();
2202 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2203 D->ExplicitInfo = ExplicitInfo;
2204 }
2205
2206 SmallVector<TemplateArgument, 8> TemplArgs;
2207 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2208 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2209 D->PointOfInstantiation = ReadSourceLocation();
2210 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2211 D->IsCompleteDefinition = Record.readInt();
2212
2213 bool writtenAsCanonicalDecl = Record.readInt();
2214 if (writtenAsCanonicalDecl) {
2215 VarTemplateDecl *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2216 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2217 // FIXME: If it's already present, merge it.
2218 if (VarTemplatePartialSpecializationDecl *Partial =
2219 dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2220 CanonPattern->getCommonPtr()->PartialSpecializations
2221 .GetOrInsertNode(Partial);
2222 } else {
2223 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2224 }
2225 }
2226 }
2227
2228 return Redecl;
2229}
2230
2231/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2232/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2233/// VarTemplate(Partial)SpecializationDecl with a new data
2234/// structure Template(Partial)SpecializationDecl, and
2235/// using Template(Partial)SpecializationDecl as input type.
2236void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2237 VarTemplatePartialSpecializationDecl *D) {
2238 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2239
2240 D->TemplateParams = Record.readTemplateParameterList();
2241 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2242
2243 // These are read/set from/to the first declaration.
2244 if (ThisDeclID == Redecl.getFirstID()) {
2245 D->InstantiatedFromMember.setPointer(
2246 ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2247 D->InstantiatedFromMember.setInt(Record.readInt());
2248 }
2249}
2250
2251void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2252 VisitTypeDecl(D);
2253
2254 D->setDeclaredWithTypename(Record.readInt());
2255
2256 if (Record.readInt())
2257 D->setDefaultArgument(GetTypeSourceInfo());
2258}
2259
2260void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2261 VisitDeclaratorDecl(D);
2262 // TemplateParmPosition.
2263 D->setDepth(Record.readInt());
2264 D->setPosition(Record.readInt());
2265 if (D->isExpandedParameterPack()) {
2266 auto TypesAndInfos =
2267 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2268 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2269 new (&TypesAndInfos[I].first) QualType(Record.readType());
2270 TypesAndInfos[I].second = GetTypeSourceInfo();
2271 }
2272 } else {
2273 // Rest of NonTypeTemplateParmDecl.
2274 D->ParameterPack = Record.readInt();
2275 if (Record.readInt())
2276 D->setDefaultArgument(Record.readExpr());
2277 }
2278}
2279
2280void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2281 VisitTemplateDecl(D);
2282 // TemplateParmPosition.
2283 D->setDepth(Record.readInt());
2284 D->setPosition(Record.readInt());
2285 if (D->isExpandedParameterPack()) {
2286 TemplateParameterList **Data =
2287 D->getTrailingObjects<TemplateParameterList *>();
2288 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2289 I != N; ++I)
2290 Data[I] = Record.readTemplateParameterList();
2291 } else {
2292 // Rest of TemplateTemplateParmDecl.
2293 D->ParameterPack = Record.readInt();
2294 if (Record.readInt())
2295 D->setDefaultArgument(Reader.getContext(),
2296 Record.readTemplateArgumentLoc());
2297 }
2298}
2299
2300void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2301 VisitRedeclarableTemplateDecl(D);
2302}
2303
2304void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2305 VisitDecl(D);
2306 D->AssertExprAndFailed.setPointer(Record.readExpr());
2307 D->AssertExprAndFailed.setInt(Record.readInt());
2308 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2309 D->RParenLoc = ReadSourceLocation();
2310}
2311
2312void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2313 VisitDecl(D);
2314}
2315
2316std::pair<uint64_t, uint64_t>
2317ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2318 uint64_t LexicalOffset = ReadLocalOffset();
2319 uint64_t VisibleOffset = ReadLocalOffset();
2320 return std::make_pair(LexicalOffset, VisibleOffset);
2321}
2322
2323template <typename T>
2324ASTDeclReader::RedeclarableResult
2325ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2326 DeclID FirstDeclID = ReadDeclID();
2327 Decl *MergeWith = nullptr;
2328
2329 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2330 bool IsFirstLocalDecl = false;
2331
2332 uint64_t RedeclOffset = 0;
2333
2334 // 0 indicates that this declaration was the only declaration of its entity,
2335 // and is used for space optimization.
2336 if (FirstDeclID == 0) {
2337 FirstDeclID = ThisDeclID;
2338 IsKeyDecl = true;
2339 IsFirstLocalDecl = true;
2340 } else if (unsigned N = Record.readInt()) {
2341 // This declaration was the first local declaration, but may have imported
2342 // other declarations.
2343 IsKeyDecl = N == 1;
2344 IsFirstLocalDecl = true;
2345
2346 // We have some declarations that must be before us in our redeclaration
2347 // chain. Read them now, and remember that we ought to merge with one of
2348 // them.
2349 // FIXME: Provide a known merge target to the second and subsequent such
2350 // declaration.
2351 for (unsigned I = 0; I != N - 1; ++I)
2352 MergeWith = ReadDecl();
2353
2354 RedeclOffset = ReadLocalOffset();
2355 } else {
2356 // This declaration was not the first local declaration. Read the first
2357 // local declaration now, to trigger the import of other redeclarations.
2358 (void)ReadDecl();
2359 }
2360
2361 T *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2362 if (FirstDecl != D) {
2363 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2364 // We temporarily set the first (canonical) declaration as the previous one
2365 // which is the one that matters and mark the real previous DeclID to be
2366 // loaded & attached later on.
2367 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2368 D->First = FirstDecl->getCanonicalDecl();
2369 }
2370
2371 T *DAsT = static_cast<T*>(D);
2372
2373 // Note that we need to load local redeclarations of this decl and build a
2374 // decl chain for them. This must happen *after* we perform the preloading
2375 // above; this ensures that the redeclaration chain is built in the correct
2376 // order.
2377 if (IsFirstLocalDecl)
2378 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2379
2380 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2381}
2382
2383/// \brief Attempts to merge the given declaration (D) with another declaration
2384/// of the same entity.
2385template<typename T>
2386void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2387 RedeclarableResult &Redecl,
2388 DeclID TemplatePatternID) {
2389 // If modules are not available, there is no reason to perform this merge.
2390 if (!Reader.getContext().getLangOpts().Modules)
2391 return;
2392
2393 // If we're not the canonical declaration, we don't need to merge.
2394 if (!DBase->isFirstDecl())
2395 return;
2396
2397 T *D = static_cast<T*>(DBase);
2398
2399 if (auto *Existing = Redecl.getKnownMergeTarget())
2400 // We already know of an existing declaration we should merge with.
2401 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2402 else if (FindExistingResult ExistingRes = findExisting(D))
2403 if (T *Existing = ExistingRes)
2404 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2405}
2406
2407/// \brief "Cast" to type T, asserting if we don't have an implicit conversion.
2408/// We use this to put code in a template that will only be valid for certain
2409/// instantiations.
2410template<typename T> static T assert_cast(T t) { return t; }
2411template<typename T> static T assert_cast(...) {
2412 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2412)
;
2413}
2414
2415/// \brief Merge together the pattern declarations from two template
2416/// declarations.
2417void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2418 RedeclarableTemplateDecl *Existing,
2419 DeclID DsID, bool IsKeyDecl) {
2420 auto *DPattern = D->getTemplatedDecl();
2421 auto *ExistingPattern = Existing->getTemplatedDecl();
2422 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2423 DPattern->getCanonicalDecl()->getGlobalID(),
2424 IsKeyDecl);
2425
2426 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2427 // Merge with any existing definition.
2428 // FIXME: This is duplicated in several places. Refactor.
2429 auto *ExistingClass =
2430 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2431 if (auto *DDD = DClass->DefinitionData) {
2432 if (ExistingClass->DefinitionData) {
2433 MergeDefinitionData(ExistingClass, std::move(*DDD));
2434 } else {
2435 ExistingClass->DefinitionData = DClass->DefinitionData;
2436 // We may have skipped this before because we thought that DClass
2437 // was the canonical declaration.
2438 Reader.PendingDefinitions.insert(DClass);
2439 }
2440 }
2441 DClass->DefinitionData = ExistingClass->DefinitionData;
2442
2443 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2444 Result);
2445 }
2446 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2447 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2448 Result);
2449 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2450 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2451 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2452 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2453 Result);
2454 llvm_unreachable("merged an unknown kind of redeclarable template")::llvm::llvm_unreachable_internal("merged an unknown kind of redeclarable template"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2454)
;
2455}
2456
2457/// \brief Attempts to merge the given declaration (D) with another declaration
2458/// of the same entity.
2459template<typename T>
2460void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2461 RedeclarableResult &Redecl,
2462 DeclID TemplatePatternID) {
2463 T *D = static_cast<T*>(DBase);
2464 T *ExistingCanon = Existing->getCanonicalDecl();
2465 T *DCanon = D->getCanonicalDecl();
2466 if (ExistingCanon != DCanon) {
2467 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&(static_cast <bool> (DCanon->getGlobalID() == Redecl
.getFirstID() && "already merged this declaration") ?
void (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2468, __extension__ __PRETTY_FUNCTION__))
2468 "already merged this declaration")(static_cast <bool> (DCanon->getGlobalID() == Redecl
.getFirstID() && "already merged this declaration") ?
void (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2468, __extension__ __PRETTY_FUNCTION__))
;
2469
2470 // Have our redeclaration link point back at the canonical declaration
2471 // of the existing declaration, so that this declaration has the
2472 // appropriate canonical declaration.
2473 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2474 D->First = ExistingCanon;
2475 ExistingCanon->Used |= D->Used;
2476 D->Used = false;
2477
2478 // When we merge a namespace, update its pointer to the first namespace.
2479 // We cannot have loaded any redeclarations of this declaration yet, so
2480 // there's nothing else that needs to be updated.
2481 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2482 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2483 assert_cast<NamespaceDecl*>(ExistingCanon));
2484
2485 // When we merge a template, merge its pattern.
2486 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2487 mergeTemplatePattern(
2488 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2489 TemplatePatternID, Redecl.isKeyDecl());
2490
2491 // If this declaration is a key declaration, make a note of that.
2492 if (Redecl.isKeyDecl())
2493 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2494 }
2495}
2496
2497/// \brief Attempts to merge the given declaration (D) with another declaration
2498/// of the same entity, for the case where the entity is not actually
2499/// redeclarable. This happens, for instance, when merging the fields of
2500/// identical class definitions from two different modules.
2501template<typename T>
2502void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2503 // If modules are not available, there is no reason to perform this merge.
2504 if (!Reader.getContext().getLangOpts().Modules)
2505 return;
2506
2507 // ODR-based merging is only performed in C++. In C, identically-named things
2508 // in different translation units are not redeclarations (but may still have
2509 // compatible types).
2510 if (!Reader.getContext().getLangOpts().CPlusPlus)
2511 return;
2512
2513 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2514 if (T *Existing = ExistingRes)
2515 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2516 Existing->getCanonicalDecl());
2517}
2518
2519void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2520 VisitDecl(D);
2521 unsigned NumVars = D->varlist_size();
2522 SmallVector<Expr *, 16> Vars;
2523 Vars.reserve(NumVars);
2524 for (unsigned i = 0; i != NumVars; ++i) {
2525 Vars.push_back(Record.readExpr());
2526 }
2527 D->setVars(Vars);
2528}
2529
2530void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2531 VisitValueDecl(D);
2532 D->setLocation(ReadSourceLocation());
2533 D->setCombiner(Record.readExpr());
2534 D->setInitializer(
2535 Record.readExpr(),
2536 static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt()));
2537 D->PrevDeclInScope = ReadDeclID();
2538}
2539
2540void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2541 VisitVarDecl(D);
2542}
2543
2544//===----------------------------------------------------------------------===//
2545// Attribute Reading
2546//===----------------------------------------------------------------------===//
2547
2548/// \brief Reads attributes from the current stream position.
2549void ASTReader::ReadAttributes(ASTRecordReader &Record, AttrVec &Attrs) {
2550 for (unsigned i = 0, e = Record.readInt(); i != e; ++i) {
2551 Attr *New = nullptr;
2552 attr::Kind Kind = (attr::Kind)Record.readInt();
2553 SourceRange Range = Record.readSourceRange();
2554 ASTContext &Context = getContext();
2555
2556#include "clang/Serialization/AttrPCHRead.inc"
2557
2558 assert(New && "Unable to decode attribute?")(static_cast <bool> (New && "Unable to decode attribute?"
) ? void (0) : __assert_fail ("New && \"Unable to decode attribute?\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2558, __extension__ __PRETTY_FUNCTION__))
;
2559 Attrs.push_back(New);
2560 }
2561}
2562
2563//===----------------------------------------------------------------------===//
2564// ASTReader Implementation
2565//===----------------------------------------------------------------------===//
2566
2567/// \brief Note that we have loaded the declaration with the given
2568/// Index.
2569///
2570/// This routine notes that this declaration has already been loaded,
2571/// so that future GetDecl calls will return this declaration rather
2572/// than trying to load a new declaration.
2573inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2574 assert(!DeclsLoaded[Index] && "Decl loaded twice?")(static_cast <bool> (!DeclsLoaded[Index] && "Decl loaded twice?"
) ? void (0) : __assert_fail ("!DeclsLoaded[Index] && \"Decl loaded twice?\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2574, __extension__ __PRETTY_FUNCTION__))
;
2575 DeclsLoaded[Index] = D;
2576}
2577
2578
2579/// \brief Determine whether the consumer will be interested in seeing
2580/// this declaration (via HandleTopLevelDecl).
2581///
2582/// This routine should return true for anything that might affect
2583/// code generation, e.g., inline function definitions, Objective-C
2584/// declarations with metadata, etc.
2585static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2586 // An ObjCMethodDecl is never considered as "interesting" because its
2587 // implementation container always is.
2588
2589 // An ImportDecl or VarDecl imported from a module map module will get
2590 // emitted when we import the relevant module.
2591 if (isa<ImportDecl>(D) || isa<VarDecl>(D)) {
2592 auto *M = D->getImportedOwningModule();
2593 if (M && M->Kind == Module::ModuleMapModule &&
2594 Ctx.DeclMustBeEmitted(D))
2595 return false;
2596 }
2597
2598 if (isa<FileScopeAsmDecl>(D) ||
2599 isa<ObjCProtocolDecl>(D) ||
2600 isa<ObjCImplDecl>(D) ||
2601 isa<ImportDecl>(D) ||
2602 isa<PragmaCommentDecl>(D) ||
2603 isa<PragmaDetectMismatchDecl>(D))
2604 return true;
2605 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2606 return !D->getDeclContext()->isFunctionOrMethod();
2607 if (VarDecl *Var = dyn_cast<VarDecl>(D))
2608 return Var->isFileVarDecl() &&
2609 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2610 if (FunctionDecl *Func = dyn_cast<FunctionDecl>(D))
2611 return Func->doesThisDeclarationHaveABody() || HasBody;
2612
2613 if (auto *ES = D->getASTContext().getExternalSource())
2614 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2615 return true;
2616
2617 return false;
2618}
2619
2620/// \brief Get the correct cursor and offset for loading a declaration.
2621ASTReader::RecordLocation
2622ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2623 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2624 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")(static_cast <bool> (I != GlobalDeclMap.end() &&
"Corrupted global declaration map") ? void (0) : __assert_fail
("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2624, __extension__ __PRETTY_FUNCTION__))
;
2625 ModuleFile *M = I->second;
2626 const DeclOffset &DOffs =
2627 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2628 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2629 return RecordLocation(M, DOffs.BitOffset);
2630}
2631
2632ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2633 ContinuousRangeMap<uint64_t, ModuleFile*, 4>::iterator I
2634 = GlobalBitOffsetsMap.find(GlobalOffset);
2635
2636 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map")(static_cast <bool> (I != GlobalBitOffsetsMap.end() &&
"Corrupted global bit offsets map") ? void (0) : __assert_fail
("I != GlobalBitOffsetsMap.end() && \"Corrupted global bit offsets map\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2636, __extension__ __PRETTY_FUNCTION__))
;
2637 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2638}
2639
2640uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2641 return LocalOffset + M.GlobalBitOffset;
2642}
2643
2644static bool isSameTemplateParameterList(const TemplateParameterList *X,
2645 const TemplateParameterList *Y);
2646
2647/// \brief Determine whether two template parameters are similar enough
2648/// that they may be used in declarations of the same template.
2649static bool isSameTemplateParameter(const NamedDecl *X,
2650 const NamedDecl *Y) {
2651 if (X->getKind() != Y->getKind())
2652 return false;
2653
2654 if (const TemplateTypeParmDecl *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2655 const TemplateTypeParmDecl *TY = cast<TemplateTypeParmDecl>(Y);
2656 return TX->isParameterPack() == TY->isParameterPack();
2657 }
2658
2659 if (const NonTypeTemplateParmDecl *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2660 const NonTypeTemplateParmDecl *TY = cast<NonTypeTemplateParmDecl>(Y);
2661 return TX->isParameterPack() == TY->isParameterPack() &&
2662 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2663 }
2664
2665 const TemplateTemplateParmDecl *TX = cast<TemplateTemplateParmDecl>(X);
2666 const TemplateTemplateParmDecl *TY = cast<TemplateTemplateParmDecl>(Y);
2667 return TX->isParameterPack() == TY->isParameterPack() &&
2668 isSameTemplateParameterList(TX->getTemplateParameters(),
2669 TY->getTemplateParameters());
2670}
2671
2672static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2673 if (auto *NS = X->getAsNamespace())
2674 return NS;
2675 if (auto *NAS = X->getAsNamespaceAlias())
2676 return NAS->getNamespace();
2677 return nullptr;
2678}
2679
2680static bool isSameQualifier(const NestedNameSpecifier *X,
2681 const NestedNameSpecifier *Y) {
2682 if (auto *NSX = getNamespace(X)) {
2683 auto *NSY = getNamespace(Y);
2684 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2685 return false;
2686 } else if (X->getKind() != Y->getKind())
2687 return false;
2688
2689 // FIXME: For namespaces and types, we're permitted to check that the entity
2690 // is named via the same tokens. We should probably do so.
2691 switch (X->getKind()) {
2692 case NestedNameSpecifier::Identifier:
2693 if (X->getAsIdentifier() != Y->getAsIdentifier())
2694 return false;
2695 break;
2696 case NestedNameSpecifier::Namespace:
2697 case NestedNameSpecifier::NamespaceAlias:
2698 // We've already checked that we named the same namespace.
2699 break;
2700 case NestedNameSpecifier::TypeSpec:
2701 case NestedNameSpecifier::TypeSpecWithTemplate:
2702 if (X->getAsType()->getCanonicalTypeInternal() !=
2703 Y->getAsType()->getCanonicalTypeInternal())
2704 return false;
2705 break;
2706 case NestedNameSpecifier::Global:
2707 case NestedNameSpecifier::Super:
2708 return true;
2709 }
2710
2711 // Recurse into earlier portion of NNS, if any.
2712 auto *PX = X->getPrefix();
2713 auto *PY = Y->getPrefix();
2714 if (PX && PY)
2715 return isSameQualifier(PX, PY);
2716 return !PX && !PY;
2717}
2718
2719/// \brief Determine whether two template parameter lists are similar enough
2720/// that they may be used in declarations of the same template.
2721static bool isSameTemplateParameterList(const TemplateParameterList *X,
2722 const TemplateParameterList *Y) {
2723 if (X->size() != Y->size())
2724 return false;
2725
2726 for (unsigned I = 0, N = X->size(); I != N; ++I)
2727 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2728 return false;
2729
2730 return true;
2731}
2732
2733/// Determine whether the attributes we can overload on are identical for A and
2734/// B. Will ignore any overloadable attrs represented in the type of A and B.
2735static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2736 const FunctionDecl *B) {
2737 // Note that pass_object_size attributes are represented in the function's
2738 // ExtParameterInfo, so we don't need to check them here.
2739
2740 SmallVector<const EnableIfAttr *, 4> AEnableIfs;
2741 // Since this is an equality check, we can ignore that enable_if attrs show up
2742 // in reverse order.
2743 for (const auto *EIA : A->specific_attrs<EnableIfAttr>())
2744 AEnableIfs.push_back(EIA);
2745
2746 SmallVector<const EnableIfAttr *, 4> BEnableIfs;
2747 for (const auto *EIA : B->specific_attrs<EnableIfAttr>())
2748 BEnableIfs.push_back(EIA);
2749
2750 // Two very common cases: either we have 0 enable_if attrs, or we have an
2751 // unequal number of enable_if attrs.
2752 if (AEnableIfs.empty() && BEnableIfs.empty())
2753 return true;
2754
2755 if (AEnableIfs.size() != BEnableIfs.size())
2756 return false;
2757
2758 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2759 for (unsigned I = 0, E = AEnableIfs.size(); I != E; ++I) {
2760 Cand1ID.clear();
2761 Cand2ID.clear();
2762
2763 AEnableIfs[I]->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2764 BEnableIfs[I]->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2765 if (Cand1ID != Cand2ID)
2766 return false;
2767 }
2768
2769 return true;
2770}
2771
2772/// \brief Determine whether the two declarations refer to the same entity.
2773static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2774 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!")(static_cast <bool> (X->getDeclName() == Y->getDeclName
() && "Declaration name mismatch!") ? void (0) : __assert_fail
("X->getDeclName() == Y->getDeclName() && \"Declaration name mismatch!\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2774, __extension__ __PRETTY_FUNCTION__))
;
2775
2776 if (X == Y)
2777 return true;
2778
2779 // Must be in the same context.
2780 if (!X->getDeclContext()->getRedeclContext()->Equals(
2781 Y->getDeclContext()->getRedeclContext()))
2782 return false;
2783
2784 // Two typedefs refer to the same entity if they have the same underlying
2785 // type.
2786 if (TypedefNameDecl *TypedefX = dyn_cast<TypedefNameDecl>(X))
2787 if (TypedefNameDecl *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2788 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2789 TypedefY->getUnderlyingType());
2790
2791 // Must have the same kind.
2792 if (X->getKind() != Y->getKind())
2793 return false;
2794
2795 // Objective-C classes and protocols with the same name always match.
2796 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2797 return true;
2798
2799 if (isa<ClassTemplateSpecializationDecl>(X)) {
2800 // No need to handle these here: we merge them when adding them to the
2801 // template.
2802 return false;
2803 }
2804
2805 // Compatible tags match.
2806 if (TagDecl *TagX = dyn_cast<TagDecl>(X)) {
2807 TagDecl *TagY = cast<TagDecl>(Y);
2808 return (TagX->getTagKind() == TagY->getTagKind()) ||
2809 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2810 TagX->getTagKind() == TTK_Interface) &&
2811 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2812 TagY->getTagKind() == TTK_Interface));
2813 }
2814
2815 // Functions with the same type and linkage match.
2816 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2817 // functions, etc.
2818 if (FunctionDecl *FuncX = dyn_cast<FunctionDecl>(X)) {
2819 FunctionDecl *FuncY = cast<FunctionDecl>(Y);
2820 if (CXXConstructorDecl *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2821 CXXConstructorDecl *CtorY = cast<CXXConstructorDecl>(Y);
2822 if (CtorX->getInheritedConstructor() &&
2823 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2824 CtorY->getInheritedConstructor().getConstructor()))
2825 return false;
2826 }
2827
2828 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
2829 return false;
2830
2831 // Multiversioned functions with different feature strings are represented
2832 // as separate declarations.
2833 if (FuncX->isMultiVersion()) {
2834 const auto *TAX = FuncX->getAttr<TargetAttr>();
2835 const auto *TAY = FuncY->getAttr<TargetAttr>();
2836 assert(TAX && TAY && "Multiversion Function without target attribute")(static_cast <bool> (TAX && TAY && "Multiversion Function without target attribute"
) ? void (0) : __assert_fail ("TAX && TAY && \"Multiversion Function without target attribute\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2836, __extension__ __PRETTY_FUNCTION__))
;
2837
2838 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
2839 return false;
2840 }
2841
2842 ASTContext &C = FuncX->getASTContext();
2843 if (!C.hasSameType(FuncX->getType(), FuncY->getType())) {
2844 // We can get functions with different types on the redecl chain in C++17
2845 // if they have differing exception specifications and at least one of
2846 // the excpetion specs is unresolved.
2847 // FIXME: Do we need to check for C++14 deduced return types here too?
2848 auto *XFPT = FuncX->getType()->getAs<FunctionProtoType>();
2849 auto *YFPT = FuncY->getType()->getAs<FunctionProtoType>();
2850 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
2851 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
2852 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
2853 C.hasSameFunctionTypeIgnoringExceptionSpec(FuncX->getType(),
2854 FuncY->getType()))
2855 return true;
2856 return false;
2857 }
2858 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
2859 hasSameOverloadableAttrs(FuncX, FuncY);
2860 }
2861
2862 // Variables with the same type and linkage match.
2863 if (VarDecl *VarX = dyn_cast<VarDecl>(X)) {
2864 VarDecl *VarY = cast<VarDecl>(Y);
2865 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
2866 ASTContext &C = VarX->getASTContext();
2867 if (C.hasSameType(VarX->getType(), VarY->getType()))
2868 return true;
2869
2870 // We can get decls with different types on the redecl chain. Eg.
2871 // template <typename T> struct S { static T Var[]; }; // #1
2872 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
2873 // Only? happens when completing an incomplete array type. In this case
2874 // when comparing #1 and #2 we should go through their element type.
2875 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
2876 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
2877 if (!VarXTy || !VarYTy)
2878 return false;
2879 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
2880 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
2881 }
2882 return false;
2883 }
2884
2885 // Namespaces with the same name and inlinedness match.
2886 if (NamespaceDecl *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2887 NamespaceDecl *NamespaceY = cast<NamespaceDecl>(Y);
2888 return NamespaceX->isInline() == NamespaceY->isInline();
2889 }
2890
2891 // Identical template names and kinds match if their template parameter lists
2892 // and patterns match.
2893 if (TemplateDecl *TemplateX = dyn_cast<TemplateDecl>(X)) {
2894 TemplateDecl *TemplateY = cast<TemplateDecl>(Y);
2895 return isSameEntity(TemplateX->getTemplatedDecl(),
2896 TemplateY->getTemplatedDecl()) &&
2897 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
2898 TemplateY->getTemplateParameters());
2899 }
2900
2901 // Fields with the same name and the same type match.
2902 if (FieldDecl *FDX = dyn_cast<FieldDecl>(X)) {
2903 FieldDecl *FDY = cast<FieldDecl>(Y);
2904 // FIXME: Also check the bitwidth is odr-equivalent, if any.
2905 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
2906 }
2907
2908 // Indirect fields with the same target field match.
2909 if (auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
2910 auto *IFDY = cast<IndirectFieldDecl>(Y);
2911 return IFDX->getAnonField()->getCanonicalDecl() ==
2912 IFDY->getAnonField()->getCanonicalDecl();
2913 }
2914
2915 // Enumerators with the same name match.
2916 if (isa<EnumConstantDecl>(X))
2917 // FIXME: Also check the value is odr-equivalent.
2918 return true;
2919
2920 // Using shadow declarations with the same target match.
2921 if (UsingShadowDecl *USX = dyn_cast<UsingShadowDecl>(X)) {
2922 UsingShadowDecl *USY = cast<UsingShadowDecl>(Y);
2923 return USX->getTargetDecl() == USY->getTargetDecl();
2924 }
2925
2926 // Using declarations with the same qualifier match. (We already know that
2927 // the name matches.)
2928 if (auto *UX = dyn_cast<UsingDecl>(X)) {
2929 auto *UY = cast<UsingDecl>(Y);
2930 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2931 UX->hasTypename() == UY->hasTypename() &&
2932 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2933 }
2934 if (auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
2935 auto *UY = cast<UnresolvedUsingValueDecl>(Y);
2936 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
2937 UX->isAccessDeclaration() == UY->isAccessDeclaration();
2938 }
2939 if (auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
2940 return isSameQualifier(
2941 UX->getQualifier(),
2942 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
2943
2944 // Namespace alias definitions with the same target match.
2945 if (auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
2946 auto *NAY = cast<NamespaceAliasDecl>(Y);
2947 return NAX->getNamespace()->Equals(NAY->getNamespace());
2948 }
2949
2950 return false;
2951}
2952
2953/// Find the context in which we should search for previous declarations when
2954/// looking for declarations to merge.
2955DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
2956 DeclContext *DC) {
2957 if (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC))
2958 return ND->getOriginalNamespace();
2959
2960 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) {
2961 // Try to dig out the definition.
2962 auto *DD = RD->DefinitionData;
2963 if (!DD)
2964 DD = RD->getCanonicalDecl()->DefinitionData;
2965
2966 // If there's no definition yet, then DC's definition is added by an update
2967 // record, but we've not yet loaded that update record. In this case, we
2968 // commit to DC being the canonical definition now, and will fix this when
2969 // we load the update record.
2970 if (!DD) {
2971 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
2972 RD->IsCompleteDefinition = true;
2973 RD->DefinitionData = DD;
2974 RD->getCanonicalDecl()->DefinitionData = DD;
2975
2976 // Track that we did this horrible thing so that we can fix it later.
2977 Reader.PendingFakeDefinitionData.insert(
2978 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
2979 }
2980
2981 return DD->Definition;
2982 }
2983
2984 if (EnumDecl *ED = dyn_cast<EnumDecl>(DC))
2985 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
2986 : nullptr;
2987
2988 // We can see the TU here only if we have no Sema object. In that case,
2989 // there's no TU scope to look in, so using the DC alone is sufficient.
2990 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
2991 return TU;
2992
2993 return nullptr;
2994}
2995
2996ASTDeclReader::FindExistingResult::~FindExistingResult() {
2997 // Record that we had a typedef name for linkage whether or not we merge
2998 // with that declaration.
2999 if (TypedefNameForLinkage) {
3000 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3001 Reader.ImportedTypedefNamesForLinkage.insert(
3002 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3003 return;
3004 }
3005
3006 if (!AddResult || Existing)
3007 return;
3008
3009 DeclarationName Name = New->getDeclName();
3010 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3011 if (needsAnonymousDeclarationNumber(New)) {
3012 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3013 AnonymousDeclNumber, New);
3014 } else if (DC->isTranslationUnit() &&
3015 !Reader.getContext().getLangOpts().CPlusPlus) {
3016 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3017 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3018 .push_back(New);
3019 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3020 // Add the declaration to its redeclaration context so later merging
3021 // lookups will find it.
3022 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3023 }
3024}
3025
3026/// Find the declaration that should be merged into, given the declaration found
3027/// by name lookup. If we're merging an anonymous declaration within a typedef,
3028/// we need a matching typedef, and we merge with the type inside it.
3029static NamedDecl *getDeclForMerging(NamedDecl *Found,
3030 bool IsTypedefNameForLinkage) {
3031 if (!IsTypedefNameForLinkage)
3032 return Found;
3033
3034 // If we found a typedef declaration that gives a name to some other
3035 // declaration, then we want that inner declaration. Declarations from
3036 // AST files are handled via ImportedTypedefNamesForLinkage.
3037 if (Found->isFromASTFile())
3038 return nullptr;
3039
3040 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3041 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3042
3043 return nullptr;
3044}
3045
3046NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3047 DeclContext *DC,
3048 unsigned Index) {
3049 // If the lexical context has been merged, look into the now-canonical
3050 // definition.
3051 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3052 DC = Merged;
3053
3054 // If we've seen this before, return the canonical declaration.
3055 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3056 if (Index < Previous.size() && Previous[Index])
3057 return Previous[Index];
3058
3059 // If this is the first time, but we have parsed a declaration of the context,
3060 // build the anonymous declaration list from the parsed declaration.
3061 if (!cast<Decl>(DC)->isFromASTFile()) {
3062 numberAnonymousDeclsWithin(DC, [&](NamedDecl *ND, unsigned Number) {
3063 if (Previous.size() == Number)
3064 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3065 else
3066 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3067 });
3068 }
3069
3070 return Index < Previous.size() ? Previous[Index] : nullptr;
3071}
3072
3073void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3074 DeclContext *DC, unsigned Index,
3075 NamedDecl *D) {
3076 if (auto *Merged = Reader.MergedDeclContexts.lookup(DC))
3077 DC = Merged;
3078
3079 auto &Previous = Reader.AnonymousDeclarationsForMerging[DC];
3080 if (Index >= Previous.size())
3081 Previous.resize(Index + 1);
3082 if (!Previous[Index])
3083 Previous[Index] = D;
3084}
3085
3086ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3087 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3088 : D->getDeclName();
3089
3090 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3091 // Don't bother trying to find unnamed declarations that are in
3092 // unmergeable contexts.
3093 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3094 AnonymousDeclNumber, TypedefNameForLinkage);
3095 Result.suppress();
3096 return Result;
3097 }
3098
3099 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3100 if (TypedefNameForLinkage) {
3101 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3102 std::make_pair(DC, TypedefNameForLinkage));
3103 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3104 if (isSameEntity(It->second, D))
3105 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3106 TypedefNameForLinkage);
3107 // Go on to check in other places in case an existing typedef name
3108 // was not imported.
3109 }
3110
3111 if (needsAnonymousDeclarationNumber(D)) {
3112 // This is an anonymous declaration that we may need to merge. Look it up
3113 // in its context by number.
3114 if (auto *Existing = getAnonymousDeclForMerging(
3115 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3116 if (isSameEntity(Existing, D))
3117 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3118 TypedefNameForLinkage);
3119 } else if (DC->isTranslationUnit() &&
3120 !Reader.getContext().getLangOpts().CPlusPlus) {
3121 IdentifierResolver &IdResolver = Reader.getIdResolver();
3122
3123 // Temporarily consider the identifier to be up-to-date. We don't want to
3124 // cause additional lookups here.
3125 class UpToDateIdentifierRAII {
3126 IdentifierInfo *II;
3127 bool WasOutToDate;
3128
3129 public:
3130 explicit UpToDateIdentifierRAII(IdentifierInfo *II)
3131 : II(II), WasOutToDate(false)
3132 {
3133 if (II) {
3134 WasOutToDate = II->isOutOfDate();
3135 if (WasOutToDate)
3136 II->setOutOfDate(false);
3137 }
3138 }
3139
3140 ~UpToDateIdentifierRAII() {
3141 if (WasOutToDate)
3142 II->setOutOfDate(true);
3143 }
3144 } UpToDate(Name.getAsIdentifierInfo());
3145
3146 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3147 IEnd = IdResolver.end();
3148 I != IEnd; ++I) {
3149 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3150 if (isSameEntity(Existing, D))
3151 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3152 TypedefNameForLinkage);
3153 }
3154 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3155 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3156 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3157 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3158 if (isSameEntity(Existing, D))
3159 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3160 TypedefNameForLinkage);
3161 }
3162 } else {
3163 // Not in a mergeable context.
3164 return FindExistingResult(Reader);
3165 }
3166
3167 // If this declaration is from a merged context, make a note that we need to
3168 // check that the canonical definition of that context contains the decl.
3169 //
3170 // FIXME: We should do something similar if we merge two definitions of the
3171 // same template specialization into the same CXXRecordDecl.
3172 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3173 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3174 MergedDCIt->second == D->getDeclContext())
3175 Reader.PendingOdrMergeChecks.push_back(D);
3176
3177 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3178 AnonymousDeclNumber, TypedefNameForLinkage);
3179}
3180
3181template<typename DeclT>
3182Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3183 return D->RedeclLink.getLatestNotUpdated();
3184}
3185Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3186 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3186)
;
3187}
3188
3189Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3190 assert(D)(static_cast <bool> (D) ? void (0) : __assert_fail ("D"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3190, __extension__ __PRETTY_FUNCTION__))
;
3191
3192 switch (D->getKind()) {
3193#define ABSTRACT_DECL(TYPE)
3194#define DECL(TYPE, BASE) \
3195 case Decl::TYPE: \
3196 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3197#include "clang/AST/DeclNodes.inc"
3198 }
3199 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3199)
;
3200}
3201
3202Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3203 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3204}
3205
3206template<typename DeclT>
3207void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3208 Redeclarable<DeclT> *D,
3209 Decl *Previous, Decl *Canon) {
3210 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3211 D->First = cast<DeclT>(Previous)->First;
3212}
3213
3214namespace clang {
3215template<>
3216void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3217 Redeclarable<VarDecl> *D,
3218 Decl *Previous, Decl *Canon) {
3219 VarDecl *VD = static_cast<VarDecl*>(D);
3220 VarDecl *PrevVD = cast<VarDecl>(Previous);
3221 D->RedeclLink.setPrevious(PrevVD);
3222 D->First = PrevVD->First;
3223
3224 // We should keep at most one definition on the chain.
3225 // FIXME: Cache the definition once we've found it. Building a chain with
3226 // N definitions currently takes O(N^2) time here.
3227 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3228 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3229 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3230 Reader.mergeDefinitionVisibility(CurD, VD);
3231 VD->demoteThisDefinitionToDeclaration();
3232 break;
3233 }
3234 }
3235 }
3236}
3237
3238template<>
3239void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3240 Redeclarable<FunctionDecl> *D,
3241 Decl *Previous, Decl *Canon) {
3242 FunctionDecl *FD = static_cast<FunctionDecl*>(D);
3243 FunctionDecl *PrevFD = cast<FunctionDecl>(Previous);
3244
3245 FD->RedeclLink.setPrevious(PrevFD);
3246 FD->First = PrevFD->First;
3247
3248 // If the previous declaration is an inline function declaration, then this
3249 // declaration is too.
3250 if (PrevFD->IsInline != FD->IsInline) {
3251 // FIXME: [dcl.fct.spec]p4:
3252 // If a function with external linkage is declared inline in one
3253 // translation unit, it shall be declared inline in all translation
3254 // units in which it appears.
3255 //
3256 // Be careful of this case:
3257 //
3258 // module A:
3259 // template<typename T> struct X { void f(); };
3260 // template<typename T> inline void X<T>::f() {}
3261 //
3262 // module B instantiates the declaration of X<int>::f
3263 // module C instantiates the definition of X<int>::f
3264 //
3265 // If module B and C are merged, we do not have a violation of this rule.
3266 FD->IsInline = true;
3267 }
3268
3269 // If we need to propagate an exception specification along the redecl
3270 // chain, make a note of that so that we can do so later.
3271 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3272 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3273 if (FPT && PrevFPT) {
3274 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3275 bool WasUnresolved =
3276 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3277 if (IsUnresolved != WasUnresolved)
3278 Reader.PendingExceptionSpecUpdates.insert(
3279 std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
3280 }
3281}
3282} // end namespace clang
3283
3284void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3285 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3285)
;
3286}
3287
3288/// Inherit the default template argument from \p From to \p To. Returns
3289/// \c false if there is no default template for \p From.
3290template <typename ParmDecl>
3291static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3292 Decl *ToD) {
3293 auto *To = cast<ParmDecl>(ToD);
3294 if (!From->hasDefaultArgument())
3295 return false;
3296 To->setInheritedDefaultArgument(Context, From);
3297 return true;
3298}
3299
3300static void inheritDefaultTemplateArguments(ASTContext &Context,
3301 TemplateDecl *From,
3302 TemplateDecl *To) {
3303 auto *FromTP = From->getTemplateParameters();
3304 auto *ToTP = To->getTemplateParameters();
3305 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?")(static_cast <bool> (FromTP->size() == ToTP->size
() && "merged mismatched templates?") ? void (0) : __assert_fail
("FromTP->size() == ToTP->size() && \"merged mismatched templates?\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3305, __extension__ __PRETTY_FUNCTION__))
;
3306
3307 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3308 NamedDecl *FromParam = FromTP->getParam(N - I - 1);
3309 if (FromParam->isParameterPack())
3310 continue;
3311 NamedDecl *ToParam = ToTP->getParam(N - I - 1);
3312
3313 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam)) {
3314 if (!inheritDefaultTemplateArgument(Context, FTTP, ToParam))
3315 break;
3316 } else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam)) {
3317 if (!inheritDefaultTemplateArgument(Context, FNTTP, ToParam))
3318 break;
3319 } else {
3320 if (!inheritDefaultTemplateArgument(
3321 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam))
3322 break;
3323 }
3324 }
3325}
3326
3327void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3328 Decl *Previous, Decl *Canon) {
3329 assert(D && Previous)(static_cast <bool> (D && Previous) ? void (0) :
__assert_fail ("D && Previous", "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3329, __extension__ __PRETTY_FUNCTION__))
;
3330
3331 switch (D->getKind()) {
3332#define ABSTRACT_DECL(TYPE)
3333#define DECL(TYPE, BASE) \
3334 case Decl::TYPE: \
3335 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3336 break;
3337#include "clang/AST/DeclNodes.inc"
3338 }
3339
3340 // If the declaration was visible in one module, a redeclaration of it in
3341 // another module remains visible even if it wouldn't be visible by itself.
3342 //
3343 // FIXME: In this case, the declaration should only be visible if a module
3344 // that makes it visible has been imported.
3345 D->IdentifierNamespace |=
3346 Previous->IdentifierNamespace &
3347 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3348
3349 // If the declaration declares a template, it may inherit default arguments
3350 // from the previous declaration.
3351 if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D))
3352 inheritDefaultTemplateArguments(Reader.getContext(),
3353 cast<TemplateDecl>(Previous), TD);
3354}
3355
3356template<typename DeclT>
3357void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3358 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3359}
3360void ASTDeclReader::attachLatestDeclImpl(...) {
3361 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3361)
;
3362}
3363
3364void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3365 assert(D && Latest)(static_cast <bool> (D && Latest) ? void (0) : __assert_fail
("D && Latest", "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3365, __extension__ __PRETTY_FUNCTION__))
;
3366
3367 switch (D->getKind()) {
3368#define ABSTRACT_DECL(TYPE)
3369#define DECL(TYPE, BASE) \
3370 case Decl::TYPE: \
3371 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3372 break;
3373#include "clang/AST/DeclNodes.inc"
3374 }
3375}
3376
3377template<typename DeclT>
3378void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3379 D->RedeclLink.markIncomplete();
3380}
3381void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3382 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3382)
;
3383}
3384
3385void ASTReader::markIncompleteDeclChain(Decl *D) {
3386 switch (D->getKind()) {
3387#define ABSTRACT_DECL(TYPE)
3388#define DECL(TYPE, BASE) \
3389 case Decl::TYPE: \
3390 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3391 break;
3392#include "clang/AST/DeclNodes.inc"
3393 }
3394}
3395
3396/// \brief Read the declaration at the given offset from the AST file.
3397Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3398 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3399 SourceLocation DeclLoc;
3400 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3401 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3402 // Keep track of where we are in the stream, then jump back there
3403 // after reading this declaration.
3404 SavedStreamPosition SavedPosition(DeclsCursor);
3405
3406 ReadingKindTracker ReadingKind(Read_Decl, *this);
3407
3408 // Note that we are loading a declaration record.
3409 Deserializing ADecl(this);
3410
3411 DeclsCursor.JumpToBit(Loc.Offset);
3412 ASTRecordReader Record(*this, *Loc.F);
3413 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3414 unsigned Code = DeclsCursor.ReadCode();
3415
3416 ASTContext &Context = getContext();
3417 Decl *D = nullptr;
3418 switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3419 case DECL_CONTEXT_LEXICAL:
3420 case DECL_CONTEXT_VISIBLE:
3421 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord")::llvm::llvm_unreachable_internal("Record cannot be de-serialized with ReadDeclRecord"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3421)
;
3422 case DECL_TYPEDEF:
3423 D = TypedefDecl::CreateDeserialized(Context, ID);
3424 break;
3425 case DECL_TYPEALIAS:
3426 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3427 break;
3428 case DECL_ENUM:
3429 D = EnumDecl::CreateDeserialized(Context, ID);
3430 break;
3431 case DECL_RECORD:
3432 D = RecordDecl::CreateDeserialized(Context, ID);
3433 break;
3434 case DECL_ENUM_CONSTANT:
3435 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3436 break;
3437 case DECL_FUNCTION:
3438 D = FunctionDecl::CreateDeserialized(Context, ID);
3439 break;
3440 case DECL_LINKAGE_SPEC:
3441 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3442 break;
3443 case DECL_EXPORT:
3444 D = ExportDecl::CreateDeserialized(Context, ID);
3445 break;
3446 case DECL_LABEL:
3447 D = LabelDecl::CreateDeserialized(Context, ID);
3448 break;
3449 case DECL_NAMESPACE:
3450 D = NamespaceDecl::CreateDeserialized(Context, ID);
3451 break;
3452 case DECL_NAMESPACE_ALIAS:
3453 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3454 break;
3455 case DECL_USING:
3456 D = UsingDecl::CreateDeserialized(Context, ID);
3457 break;
3458 case DECL_USING_PACK:
3459 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3460 break;
3461 case DECL_USING_SHADOW:
3462 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3463 break;
3464 case DECL_CONSTRUCTOR_USING_SHADOW:
3465 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3466 break;
3467 case DECL_USING_DIRECTIVE:
3468 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3469 break;
3470 case DECL_UNRESOLVED_USING_VALUE:
3471 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3472 break;
3473 case DECL_UNRESOLVED_USING_TYPENAME:
3474 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3475 break;
3476 case DECL_CXX_RECORD:
3477 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3478 break;
3479 case DECL_CXX_DEDUCTION_GUIDE:
3480 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3481 break;
3482 case DECL_CXX_METHOD:
3483 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3484 break;
3485 case DECL_CXX_CONSTRUCTOR:
3486 D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3487 break;
3488 case DECL_CXX_INHERITED_CONSTRUCTOR:
3489 D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3490 break;
3491 case DECL_CXX_DESTRUCTOR:
3492 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3493 break;
3494 case DECL_CXX_CONVERSION:
3495 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3496 break;
3497 case DECL_ACCESS_SPEC:
3498 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3499 break;
3500 case DECL_FRIEND:
3501 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3502 break;
3503 case DECL_FRIEND_TEMPLATE:
3504 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3505 break;
3506 case DECL_CLASS_TEMPLATE:
3507 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3508 break;
3509 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3510 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3511 break;
3512 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3513 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3514 break;
3515 case DECL_VAR_TEMPLATE:
3516 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3517 break;
3518 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3519 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3520 break;
3521 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3522 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3523 break;
3524 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3525 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3526 break;
3527 case DECL_FUNCTION_TEMPLATE:
3528 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3529 break;
3530 case DECL_TEMPLATE_TYPE_PARM:
3531 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3532 break;
3533 case DECL_NON_TYPE_TEMPLATE_PARM:
3534 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3535 break;
3536 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3537 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3538 Record.readInt());
3539 break;
3540 case DECL_TEMPLATE_TEMPLATE_PARM:
3541 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3542 break;
3543 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3544 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3545 Record.readInt());
3546 break;
3547 case DECL_TYPE_ALIAS_TEMPLATE:
3548 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3549 break;
3550 case DECL_STATIC_ASSERT:
3551 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3552 break;
3553 case DECL_OBJC_METHOD:
3554 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3555 break;
3556 case DECL_OBJC_INTERFACE:
3557 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3558 break;
3559 case DECL_OBJC_IVAR:
3560 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3561 break;
3562 case DECL_OBJC_PROTOCOL:
3563 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3564 break;
3565 case DECL_OBJC_AT_DEFS_FIELD:
3566 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3567 break;
3568 case DECL_OBJC_CATEGORY:
3569 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3570 break;
3571 case DECL_OBJC_CATEGORY_IMPL:
3572 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3573 break;
3574 case DECL_OBJC_IMPLEMENTATION:
3575 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3576 break;
3577 case DECL_OBJC_COMPATIBLE_ALIAS:
3578 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3579 break;
3580 case DECL_OBJC_PROPERTY:
3581 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3582 break;
3583 case DECL_OBJC_PROPERTY_IMPL:
3584 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3585 break;
3586 case DECL_FIELD:
3587 D = FieldDecl::CreateDeserialized(Context, ID);
3588 break;
3589 case DECL_INDIRECTFIELD:
3590 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3591 break;
3592 case DECL_VAR:
3593 D = VarDecl::CreateDeserialized(Context, ID);
3594 break;
3595 case DECL_IMPLICIT_PARAM:
3596 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3597 break;
3598 case DECL_PARM_VAR:
3599 D = ParmVarDecl::CreateDeserialized(Context, ID);
3600 break;
3601 case DECL_DECOMPOSITION:
3602 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3603 break;
3604 case DECL_BINDING:
3605 D = BindingDecl::CreateDeserialized(Context, ID);
3606 break;
3607 case DECL_FILE_SCOPE_ASM:
3608 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3609 break;
3610 case DECL_BLOCK:
3611 D = BlockDecl::CreateDeserialized(Context, ID);
3612 break;
3613 case DECL_MS_PROPERTY:
3614 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3615 break;
3616 case DECL_CAPTURED:
3617 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3618 break;
3619 case DECL_CXX_BASE_SPECIFIERS:
3620 Error("attempt to read a C++ base-specifier record as a declaration");
3621 return nullptr;
3622 case DECL_CXX_CTOR_INITIALIZERS:
3623 Error("attempt to read a C++ ctor initializer record as a declaration");
3624 return nullptr;
3625 case DECL_IMPORT:
3626 // Note: last entry of the ImportDecl record is the number of stored source
3627 // locations.
3628 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3629 break;
3630 case DECL_OMP_THREADPRIVATE:
3631 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3632 break;
3633 case DECL_OMP_DECLARE_REDUCTION:
3634 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3635 break;
3636 case DECL_OMP_CAPTUREDEXPR:
3637 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3638 break;
3639 case DECL_PRAGMA_COMMENT:
3640 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3641 break;
3642 case DECL_PRAGMA_DETECT_MISMATCH:
3643 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3644 Record.readInt());
3645 break;
3646 case DECL_EMPTY:
3647 D = EmptyDecl::CreateDeserialized(Context, ID);
3648 break;
3649 case DECL_OBJC_TYPE_PARAM:
3650 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3651 break;
3652 }
3653
3654 assert(D && "Unknown declaration reading AST file")(static_cast <bool> (D && "Unknown declaration reading AST file"
) ? void (0) : __assert_fail ("D && \"Unknown declaration reading AST file\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3654, __extension__ __PRETTY_FUNCTION__))
;
3655 LoadedDecl(Index, D);
3656 // Set the DeclContext before doing any deserialization, to make sure internal
3657 // calls to Decl::getASTContext() by Decl's methods will find the
3658 // TranslationUnitDecl without crashing.
3659 D->setDeclContext(Context.getTranslationUnitDecl());
3660 Reader.Visit(D);
3661
3662 // If this declaration is also a declaration context, get the
3663 // offsets for its tables of lexical and visible declarations.
3664 if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
3665 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3666 if (Offsets.first &&
3667 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3668 return nullptr;
3669 if (Offsets.second &&
3670 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3671 return nullptr;
3672 }
3673 assert(Record.getIdx() == Record.size())(static_cast <bool> (Record.getIdx() == Record.size()) ?
void (0) : __assert_fail ("Record.getIdx() == Record.size()"
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3673, __extension__ __PRETTY_FUNCTION__))
;
3674
3675 // Load any relevant update records.
3676 PendingUpdateRecords.push_back(
3677 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3678
3679 // Load the categories after recursive loading is finished.
3680 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))
3681 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3682 // we put the Decl in PendingDefinitions so we can pull the categories here.
3683 if (Class->isThisDeclarationADefinition() ||
3684 PendingDefinitions.count(Class))
3685 loadObjCCategories(ID, Class);
3686
3687 // If we have deserialized a declaration that has a definition the
3688 // AST consumer might need to know about, queue it.
3689 // We don't pass it to the consumer immediately because we may be in recursive
3690 // loading, and some declarations may still be initializing.
3691 PotentiallyInterestingDecls.push_back(
3692 InterestingDecl(D, Reader.hasPendingBody()));
3693
3694 return D;
3695}
3696
3697void ASTReader::PassInterestingDeclsToConsumer() {
3698 assert(Consumer)(static_cast <bool> (Consumer) ? void (0) : __assert_fail
("Consumer", "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3698, __extension__ __PRETTY_FUNCTION__))
;
3699
3700 if (PassingDeclsToConsumer)
3701 return;
3702
3703 // Guard variable to avoid recursively redoing the process of passing
3704 // decls to consumer.
3705 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3706 true);
3707
3708 // Ensure that we've loaded all potentially-interesting declarations
3709 // that need to be eagerly loaded.
3710 for (auto ID : EagerlyDeserializedDecls)
3711 GetDecl(ID);
3712 EagerlyDeserializedDecls.clear();
3713
3714 while (!PotentiallyInterestingDecls.empty()) {
3715 InterestingDecl D = PotentiallyInterestingDecls.front();
3716 PotentiallyInterestingDecls.pop_front();
3717 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3718 PassInterestingDeclToConsumer(D.getDecl());
3719 }
3720}
3721
3722void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3723 // The declaration may have been modified by files later in the chain.
3724 // If this is the case, read the record containing the updates from each file
3725 // and pass it to ASTDeclReader to make the modifications.
3726 serialization::GlobalDeclID ID = Record.ID;
3727 Decl *D = Record.D;
3728 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3729 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3730
3731 llvm::SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3732
3733 if (UpdI != DeclUpdateOffsets.end()) {
1
Assuming the condition is false
2
Taking false branch
3734 auto UpdateOffsets = std::move(UpdI->second);
3735 DeclUpdateOffsets.erase(UpdI);
3736
3737 // Check if this decl was interesting to the consumer. If we just loaded
3738 // the declaration, then we know it was interesting and we skip the call
3739 // to isConsumerInterestedIn because it is unsafe to call in the
3740 // current ASTReader state.
3741 bool WasInteresting =
3742 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3743 for (auto &FileAndOffset : UpdateOffsets) {
3744 ModuleFile *F = FileAndOffset.first;
3745 uint64_t Offset = FileAndOffset.second;
3746 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3747 SavedStreamPosition SavedPosition(Cursor);
3748 Cursor.JumpToBit(Offset);
3749 unsigned Code = Cursor.ReadCode();
3750 ASTRecordReader Record(*this, *F);
3751 unsigned RecCode = Record.readRecord(Cursor, Code);
3752 (void)RecCode;
3753 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!")(static_cast <bool> (RecCode == DECL_UPDATES &&
"Expected DECL_UPDATES record!") ? void (0) : __assert_fail (
"RecCode == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3753, __extension__ __PRETTY_FUNCTION__))
;
3754
3755 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3756 SourceLocation());
3757 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3758
3759 // We might have made this declaration interesting. If so, remember that
3760 // we need to hand it off to the consumer.
3761 if (!WasInteresting &&
3762 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
3763 PotentiallyInterestingDecls.push_back(
3764 InterestingDecl(D, Reader.hasPendingBody()));
3765 WasInteresting = true;
3766 }
3767 }
3768 }
3769 // Add the lazy specializations to the template.
3770 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||(static_cast <bool> ((PendingLazySpecializationIDs.empty
() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl
>(D) || isa<VarTemplateDecl>(D)) && "Must not have pending specializations"
) ? void (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3772, __extension__ __PRETTY_FUNCTION__))
3771 isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&(static_cast <bool> ((PendingLazySpecializationIDs.empty
() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl
>(D) || isa<VarTemplateDecl>(D)) && "Must not have pending specializations"
) ? void (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3772, __extension__ __PRETTY_FUNCTION__))
3772 "Must not have pending specializations")(static_cast <bool> ((PendingLazySpecializationIDs.empty
() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl
>(D) || isa<VarTemplateDecl>(D)) && "Must not have pending specializations"
) ? void (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3772, __extension__ __PRETTY_FUNCTION__))
;
3773 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
3
Assuming 'CTD' is non-null
4
Taking true branch
3774 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
3775 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
3776 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
3777 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
3778 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
3779 PendingLazySpecializationIDs.clear();
3780
3781 // Load the pending visible updates for this decl context, if it has any.
3782 auto I = PendingVisibleUpdates.find(ID);
3783 if (I != PendingVisibleUpdates.end()) {
5
Assuming the condition is true
6
Taking true branch
3784 auto VisibleUpdates = std::move(I->second);
3785 PendingVisibleUpdates.erase(I);
3786
3787 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3788 for (const PendingVisibleUpdate &Update : VisibleUpdates)
7
Assuming '__begin2' is not equal to '__end2'
3789 Lookups[DC].Table.add(
8
Calling 'MultiOnDiskHashTable::add'
3790 Update.Mod, Update.Data,
3791 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
3792 DC->setHasExternalVisibleStorage(true);
3793 }
3794}
3795
3796void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3797 // Attach FirstLocal to the end of the decl chain.
3798 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3799 if (FirstLocal != CanonDecl) {
3800 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3801 ASTDeclReader::attachPreviousDecl(
3802 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3803 CanonDecl);
3804 }
3805
3806 if (!LocalOffset) {
3807 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3808 return;
3809 }
3810
3811 // Load the list of other redeclarations from this module file.
3812 ModuleFile *M = getOwningModuleFile(FirstLocal);
3813 assert(M && "imported decl from no module file")(static_cast <bool> (M && "imported decl from no module file"
) ? void (0) : __assert_fail ("M && \"imported decl from no module file\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3813, __extension__ __PRETTY_FUNCTION__))
;
3814
3815 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3816 SavedStreamPosition SavedPosition(Cursor);
3817 Cursor.JumpToBit(LocalOffset);
3818
3819 RecordData Record;
3820 unsigned Code = Cursor.ReadCode();
3821 unsigned RecCode = Cursor.readRecord(Code, Record);
3822 (void)RecCode;
3823 assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!")(static_cast <bool> (RecCode == LOCAL_REDECLARATIONS &&
"expected LOCAL_REDECLARATIONS record!") ? void (0) : __assert_fail
("RecCode == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3823, __extension__ __PRETTY_FUNCTION__))
;
3824
3825 // FIXME: We have several different dispatches on decl kind here; maybe
3826 // we should instead generate one loop per kind and dispatch up-front?
3827 Decl *MostRecent = FirstLocal;
3828 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3829 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3830 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3831 MostRecent = D;
3832 }
3833 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3834}
3835
3836namespace {
3837 /// \brief Given an ObjC interface, goes through the modules and links to the
3838 /// interface all the categories for it.
3839 class ObjCCategoriesVisitor {
3840 ASTReader &Reader;
3841 ObjCInterfaceDecl *Interface;
3842 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3843 ObjCCategoryDecl *Tail;
3844 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3845 serialization::GlobalDeclID InterfaceID;
3846 unsigned PreviousGeneration;
3847
3848 void add(ObjCCategoryDecl *Cat) {
3849 // Only process each category once.
3850 if (!Deserialized.erase(Cat))
3851 return;
3852
3853 // Check for duplicate categories.
3854 if (Cat->getDeclName()) {
3855 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3856 if (Existing &&
3857 Reader.getOwningModuleFile(Existing)
3858 != Reader.getOwningModuleFile(Cat)) {
3859 // FIXME: We should not warn for duplicates in diamond:
3860 //
3861 // MT //
3862 // / \ //
3863 // ML MR //
3864 // \ / //
3865 // MB //
3866 //
3867 // If there are duplicates in ML/MR, there will be warning when
3868 // creating MB *and* when importing MB. We should not warn when
3869 // importing.
3870 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
3871 << Interface->getDeclName() << Cat->getDeclName();
3872 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
3873 } else if (!Existing) {
3874 // Record this category.
3875 Existing = Cat;
3876 }
3877 }
3878
3879 // Add this category to the end of the chain.
3880 if (Tail)
3881 ASTDeclReader::setNextObjCCategory(Tail, Cat);
3882 else
3883 Interface->setCategoryListRaw(Cat);
3884 Tail = Cat;
3885 }
3886
3887 public:
3888 ObjCCategoriesVisitor(ASTReader &Reader,
3889 ObjCInterfaceDecl *Interface,
3890 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
3891 serialization::GlobalDeclID InterfaceID,
3892 unsigned PreviousGeneration)
3893 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
3894 Tail(nullptr), InterfaceID(InterfaceID),
3895 PreviousGeneration(PreviousGeneration)
3896 {
3897 // Populate the name -> category map with the set of known categories.
3898 for (auto *Cat : Interface->known_categories()) {
3899 if (Cat->getDeclName())
3900 NameCategoryMap[Cat->getDeclName()] = Cat;
3901
3902 // Keep track of the tail of the category list.
3903 Tail = Cat;
3904 }
3905 }
3906
3907 bool operator()(ModuleFile &M) {
3908 // If we've loaded all of the category information we care about from
3909 // this module file, we're done.
3910 if (M.Generation <= PreviousGeneration)
3911 return true;
3912
3913 // Map global ID of the definition down to the local ID used in this
3914 // module file. If there is no such mapping, we'll find nothing here
3915 // (or in any module it imports).
3916 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
3917 if (!LocalID)
3918 return true;
3919
3920 // Perform a binary search to find the local redeclarations for this
3921 // declaration (if any).
3922 const ObjCCategoriesInfo Compare = { LocalID, 0 };
3923 const ObjCCategoriesInfo *Result
3924 = std::lower_bound(M.ObjCCategoriesMap,
3925 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
3926 Compare);
3927 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
3928 Result->DefinitionID != LocalID) {
3929 // We didn't find anything. If the class definition is in this module
3930 // file, then the module files it depends on cannot have any categories,
3931 // so suppress further lookup.
3932 return Reader.isDeclIDFromModule(InterfaceID, M);
3933 }
3934
3935 // We found something. Dig out all of the categories.
3936 unsigned Offset = Result->Offset;
3937 unsigned N = M.ObjCCategories[Offset];
3938 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
3939 for (unsigned I = 0; I != N; ++I)
3940 add(cast_or_null<ObjCCategoryDecl>(
3941 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
3942 return true;
3943 }
3944 };
3945} // end anonymous namespace
3946
3947void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
3948 ObjCInterfaceDecl *D,
3949 unsigned PreviousGeneration) {
3950 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
3951 PreviousGeneration);
3952 ModuleMgr.visit(Visitor);
3953}
3954
3955template<typename DeclT, typename Fn>
3956static void forAllLaterRedecls(DeclT *D, Fn F) {
3957 F(D);
3958
3959 // Check whether we've already merged D into its redeclaration chain.
3960 // MostRecent may or may not be nullptr if D has not been merged. If
3961 // not, walk the merged redecl chain and see if it's there.
3962 auto *MostRecent = D->getMostRecentDecl();
3963 bool Found = false;
3964 for (auto *Redecl = MostRecent; Redecl && !Found;
3965 Redecl = Redecl->getPreviousDecl())
3966 Found = (Redecl == D);
3967
3968 // If this declaration is merged, apply the functor to all later decls.
3969 if (Found) {
3970 for (auto *Redecl = MostRecent; Redecl != D;
3971 Redecl = Redecl->getPreviousDecl())
3972 F(Redecl);
3973 }
3974}
3975
3976void ASTDeclReader::UpdateDecl(Decl *D,
3977 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
3978 while (Record.getIdx() < Record.size()) {
3979 switch ((DeclUpdateKind)Record.readInt()) {
3980 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
3981 auto *RD = cast<CXXRecordDecl>(D);
3982 // FIXME: If we also have an update record for instantiating the
3983 // definition of D, we need that to happen before we get here.
3984 Decl *MD = Record.readDecl();
3985 assert(MD && "couldn't read decl from update record")(static_cast <bool> (MD && "couldn't read decl from update record"
) ? void (0) : __assert_fail ("MD && \"couldn't read decl from update record\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3985, __extension__ __PRETTY_FUNCTION__))
;
3986 // FIXME: We should call addHiddenDecl instead, to add the member
3987 // to its DeclContext.
3988 RD->addedMember(MD);
3989 break;
3990 }
3991
3992 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
3993 // It will be added to the template's lazy specialization set.
3994 PendingLazySpecializationIDs.push_back(ReadDeclID());
3995 break;
3996
3997 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
3998 NamespaceDecl *Anon = ReadDeclAs<NamespaceDecl>();
3999
4000 // Each module has its own anonymous namespace, which is disjoint from
4001 // any other module's anonymous namespaces, so don't attach the anonymous
4002 // namespace at all.
4003 if (!Record.isModule()) {
4004 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(D))
4005 TU->setAnonymousNamespace(Anon);
4006 else
4007 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4008 }
4009 break;
4010 }
4011
4012 case UPD_CXX_ADDED_VAR_DEFINITION: {
4013 VarDecl *VD = cast<VarDecl>(D);
4014 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4015 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4016 uint64_t Val = Record.readInt();
4017 if (Val && !VD->getInit()) {
4018 VD->setInit(Record.readExpr());
4019 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4020 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4021 Eval->CheckedICE = true;
4022 Eval->IsICE = Val == 3;
4023 }
4024 }
4025 break;
4026 }
4027
4028 case UPD_CXX_POINT_OF_INSTANTIATION: {
4029 SourceLocation POI = Record.readSourceLocation();
4030 if (VarTemplateSpecializationDecl *VTSD =
4031 dyn_cast<VarTemplateSpecializationDecl>(D)) {
4032 VTSD->setPointOfInstantiation(POI);
4033 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4034 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4035 } else {
4036 auto *FD = cast<FunctionDecl>(D);
4037 if (auto *FTSInfo = FD->TemplateOrSpecialization
4038 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4039 FTSInfo->setPointOfInstantiation(POI);
4040 else
4041 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4042 ->setPointOfInstantiation(POI);
4043 }
4044 break;
4045 }
4046
4047 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4048 auto Param = cast<ParmVarDecl>(D);
4049
4050 // We have to read the default argument regardless of whether we use it
4051 // so that hypothetical further update records aren't messed up.
4052 // TODO: Add a function to skip over the next expr record.
4053 auto DefaultArg = Record.readExpr();
4054
4055 // Only apply the update if the parameter still has an uninstantiated
4056 // default argument.
4057 if (Param->hasUninstantiatedDefaultArg())
4058 Param->setDefaultArg(DefaultArg);
4059 break;
4060 }
4061
4062 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4063 auto FD = cast<FieldDecl>(D);
4064 auto DefaultInit = Record.readExpr();
4065
4066 // Only apply the update if the field still has an uninstantiated
4067 // default member initializer.
4068 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4069 if (DefaultInit)
4070 FD->setInClassInitializer(DefaultInit);
4071 else
4072 // Instantiation failed. We can get here if we serialized an AST for
4073 // an invalid program.
4074 FD->removeInClassInitializer();
4075 }
4076 break;
4077 }
4078
4079 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4080 FunctionDecl *FD = cast<FunctionDecl>(D);
4081 if (Reader.PendingBodies[FD]) {
4082 // FIXME: Maybe check for ODR violations.
4083 // It's safe to stop now because this update record is always last.
4084 return;
4085 }
4086
4087 if (Record.readInt()) {
4088 // Maintain AST consistency: any later redeclarations of this function
4089 // are inline if this one is. (We might have merged another declaration
4090 // into this one.)
4091 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4092 FD->setImplicitlyInline();
4093 });
4094 }
4095 FD->setInnerLocStart(ReadSourceLocation());
4096 ReadFunctionDefinition(FD);
4097 assert(Record.getIdx() == Record.size() && "lazy body must be last")(static_cast <bool> (Record.getIdx() == Record.size() &&
"lazy body must be last") ? void (0) : __assert_fail ("Record.getIdx() == Record.size() && \"lazy body must be last\""
, "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4097, __extension__ __PRETTY_FUNCTION__))
;
4098 break;
4099 }
4100
4101 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4102 auto *RD = cast<CXXRecordDecl>(D);
4103 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4104 bool HadRealDefinition =
4105 OldDD && (OldDD->Definition != RD ||
4106 !Reader.PendingFakeDefinitionData.count(OldDD));
4107 ReadCXXRecordDefinition(RD, /*Update*/true);
4108
4109 // Visible update is handled separately.
4110 uint64_t LexicalOffset = ReadLocalOffset();
4111 if (!HadRealDefinition && LexicalOffset) {
4112 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4113 Reader.PendingFakeDefinitionData.erase(OldDD);
4114 }
4115
4116 auto TSK = (TemplateSpecializationKind)Record.readInt();
4117 SourceLocation POI = ReadSourceLocation();
4118 if (MemberSpecializationInfo *MSInfo =
4119 RD->getMemberSpecializationInfo()) {
4120 MSInfo->setTemplateSpecializationKind(TSK);
4121 MSInfo->setPointOfInstantiation(POI);
4122 } else {
4123 ClassTemplateSpecializationDecl *Spec =
4124 cast<ClassTemplateSpecializationDecl>(RD);
4125 Spec->setTemplateSpecializationKind(TSK);
4126 Spec->setPointOfInstantiation(POI);
4127
4128 if (Record.readInt()) {
4129 auto PartialSpec =
4130 ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4131 SmallVector<TemplateArgument, 8> TemplArgs;
4132 Record.readTemplateArgumentList(TemplArgs);
4133 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4134 Reader.getContext(), TemplArgs);
4135
4136 // FIXME: If we already have a partial specialization set,
4137 // check that it matches.
4138 if (!Spec->getSpecializedTemplateOrPartial()
4139 .is<ClassTemplatePartialSpecializationDecl *>())
4140 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4141 }
4142 }
4143
4144 RD->setTagKind((TagTypeKind)Record.readInt());
4145 RD->setLocation(ReadSourceLocation());
4146 RD->setLocStart(ReadSourceLocation());
4147 RD->setBraceRange(ReadSourceRange());
4148
4149 if (Record.readInt()) {
4150 AttrVec Attrs;
4151 Record.readAttributes(Attrs);
4152 // If the declaration already has attributes, we assume that some other
4153 // AST file already loaded them.
4154 if (!D->hasAttrs())
4155 D->setAttrsImpl(Attrs, Reader.getContext());
4156 }
4157 break;
4158 }
4159
4160 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4161 // Set the 'operator delete' directly to avoid emitting another update
4162 // record.
4163 auto *Del = ReadDeclAs<FunctionDecl>();
4164 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4165 auto *ThisArg = Record.readExpr();
4166 // FIXME: Check consistency if we have an old and new operator delete.
4167 if (!First->OperatorDelete) {
4168 First->OperatorDelete = Del;
4169 First->OperatorDeleteThisArg = ThisArg;
4170 }
4171 break;
4172 }
4173
4174 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4175 FunctionProtoType::ExceptionSpecInfo ESI;
4176 SmallVector<QualType, 8> ExceptionStorage;
4177 Record.readExceptionSpec(ExceptionStorage, ESI);
4178
4179 // Update this declaration's exception specification, if needed.
4180 auto *FD = cast<FunctionDecl>(D);
4181 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4182 // FIXME: If the exception specification is already present, check that it
4183 // matches.
4184 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4185 FD->setType(Reader.getContext().getFunctionType(
4186 FPT->getReturnType(), FPT->getParamTypes(),
4187 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4188
4189 // When we get to the end of deserializing, see if there are other decls
4190 // that we need to propagate this exception specification onto.
4191 Reader.PendingExceptionSpecUpdates.insert(
4192 std::make_pair(FD->getCanonicalDecl(), FD));
4193 }
4194 break;
4195 }
4196
4197 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4198 // FIXME: Also do this when merging redecls.
4199 QualType DeducedResultType = Record.readType();
4200 for (auto *Redecl : merged_redecls(D)) {
4201 // FIXME: If the return type is already deduced, check that it matches.
4202 FunctionDecl *FD = cast<FunctionDecl>(Redecl);
4203 Reader.getContext().adjustDeducedFunctionResultType(FD,
4204 DeducedResultType);
4205 }
4206 break;
4207 }
4208
4209 case UPD_DECL_MARKED_USED: {
4210 // Maintain AST consistency: any later redeclarations are used too.
4211 D->markUsed(Reader.getContext());
4212 break;
4213 }
4214
4215 case UPD_MANGLING_NUMBER:
4216 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4217 Record.readInt());
4218 break;
4219
4220 case UPD_STATIC_LOCAL_NUMBER:
4221 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4222 Record.readInt());
4223 break;
4224
4225 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4226 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4227 ReadSourceRange()));
4228 break;
4229
4230 case UPD_DECL_EXPORTED: {
4231 unsigned SubmoduleID = readSubmoduleID();
4232 auto *Exported = cast<NamedDecl>(D);
4233 if (auto *TD = dyn_cast<TagDecl>(Exported))
4234 Exported = TD->getDefinition();
4235 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4236 if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
4237 Reader.getContext().mergeDefinitionIntoModule(cast<NamedDecl>(Exported),
4238 Owner);
4239 Reader.PendingMergedDefinitionsToDeduplicate.insert(
4240 cast<NamedDecl>(Exported));
4241 } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
4242 // If Owner is made visible at some later point, make this declaration
4243 // visible too.
4244 Reader.HiddenNamesMap[Owner].push_back(Exported);
4245 } else {
4246 // The declaration is now visible.
4247 Exported->setVisibleDespiteOwningModule();
4248 }
4249 break;
4250 }
4251
4252 case UPD_DECL_MARKED_OPENMP_DECLARETARGET:
4253 case UPD_ADDED_ATTR_TO_RECORD:
4254 AttrVec Attrs;
4255 Record.readAttributes(Attrs);
4256 assert(Attrs.size() == 1)(static_cast <bool> (Attrs.size() == 1) ? void (0) : __assert_fail
("Attrs.size() == 1", "/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4256, __extension__ __PRETTY_FUNCTION__))
;
4257 D->addAttr(Attrs[0]);
4258 break;
4259 }
4260 }
4261}

/build/llvm-toolchain-snapshot-7~svn325874/tools/clang/lib/Serialization/MultiOnDiskHashTable.h

1//===- MultiOnDiskHashTable.h - Merged set of hash tables -------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file provides a hash table data structure suitable for incremental and
11// distributed storage across a set of files.
12//
13// Multiple hash tables from different files are implicitly merged to improve
14// performance, and on reload the merged table will override those from other
15// files.
16//
17//===----------------------------------------------------------------------===//
18
19#ifndef LLVM_CLANG_LIB_SERIALIZATION_MULTIONDISKHASHTABLE_H
20#define LLVM_CLANG_LIB_SERIALIZATION_MULTIONDISKHASHTABLE_H
21
22#include "llvm/ADT/DenseMap.h"
23#include "llvm/ADT/DenseSet.h"
24#include "llvm/ADT/PointerUnion.h"
25#include "llvm/ADT/STLExtras.h"
26#include "llvm/ADT/SmallVector.h"
27#include "llvm/ADT/TinyPtrVector.h"
28#include "llvm/ADT/iterator_range.h"
29#include "llvm/Support/Endian.h"
30#include "llvm/Support/EndianStream.h"
31#include "llvm/Support/OnDiskHashTable.h"
32#include "llvm/Support/raw_ostream.h"
33#include <algorithm>
34#include <cstdint>
35#include <vector>
36
37namespace clang {
38namespace serialization {
39
40/// \brief A collection of on-disk hash tables, merged when relevant for performance.
41template<typename Info> class MultiOnDiskHashTable {
42public:
43 /// A handle to a file, used when overriding tables.
44 using file_type = typename Info::file_type;
45
46 /// A pointer to an on-disk representation of the hash table.
47 using storage_type = const unsigned char *;
48
49 using external_key_type = typename Info::external_key_type;
50 using internal_key_type = typename Info::internal_key_type;
51 using data_type = typename Info::data_type;
52 using data_type_builder = typename Info::data_type_builder;
53 using hash_value_type = unsigned;
54
55private:
56 /// The generator is permitted to read our merged table.
57 template<typename ReaderInfo, typename WriterInfo>
58 friend class MultiOnDiskHashTableGenerator;
59
60 /// \brief A hash table stored on disk.
61 struct OnDiskTable {
62 using HashTable = llvm::OnDiskIterableChainedHashTable<Info>;
63
64 file_type File;
65 HashTable Table;
66
67 OnDiskTable(file_type File, unsigned NumBuckets, unsigned NumEntries,
68 storage_type Buckets, storage_type Payload, storage_type Base,
69 const Info &InfoObj)
70 : File(File),
71 Table(NumBuckets, NumEntries, Buckets, Payload, Base, InfoObj) {}
72 };
73
74 struct MergedTable {
75 std::vector<file_type> Files;
76 llvm::DenseMap<internal_key_type, data_type> Data;
77 };
78
79 using Table = llvm::PointerUnion<OnDiskTable *, MergedTable *>;
80 using TableVector = llvm::TinyPtrVector<void *>;
81
82 /// \brief The current set of on-disk and merged tables.
83 /// We manually store the opaque value of the Table because TinyPtrVector
84 /// can't cope with holding a PointerUnion directly.
85 /// There can be at most one MergedTable in this vector, and if present,
86 /// it is the first table.
87 TableVector Tables;
88
89 /// \brief Files corresponding to overridden tables that we've not yet
90 /// discarded.
91 llvm::TinyPtrVector<file_type> PendingOverrides;
92
93 struct AsOnDiskTable {
94 using result_type = OnDiskTable *;
95
96 result_type operator()(void *P) const {
97 return Table::getFromOpaqueValue(P).template get<OnDiskTable *>();
98 }
99 };
100
101 using table_iterator =
102 llvm::mapped_iterator<TableVector::iterator, AsOnDiskTable>;
103 using table_range = llvm::iterator_range<table_iterator>;
104
105 /// \brief The current set of on-disk tables.
106 table_range tables() {
107 auto Begin = Tables.begin(), End = Tables.end();
108 if (getMergedTable())
109 ++Begin;
110 return llvm::make_range(llvm::map_iterator(Begin, AsOnDiskTable()),
111 llvm::map_iterator(End, AsOnDiskTable()));
112 }
113
114 MergedTable *getMergedTable() const {
115 // If we already have a merged table, it's the first one.
116 return Tables.empty() ? nullptr : Table::getFromOpaqueValue(*Tables.begin())
117 .template dyn_cast<MergedTable*>();
118 }
119
120 /// \brief Delete all our current on-disk tables.
121 void clear() {
122 for (auto *T : tables())
123 delete T;
124 if (auto *M = getMergedTable())
125 delete M;
126 Tables.clear();
127 }
128
129 void removeOverriddenTables() {
130 llvm::DenseSet<file_type> Files;
131 Files.insert(PendingOverrides.begin(), PendingOverrides.end());
132 // Explicitly capture Files to work around an MSVC 2015 rejects-valid bug.
133 auto ShouldRemove = [&Files](void *T) -> bool {
134 auto *ODT = Table::getFromOpaqueValue(T).template get<OnDiskTable *>();
135 bool Remove = Files.count(ODT->File);
136 if (Remove)
137 delete ODT;
138 return Remove;
139 };
140 Tables.erase(std::remove_if(tables().begin().getCurrent(), Tables.end(),
141 ShouldRemove),
142 Tables.end());
143 PendingOverrides.clear();
144 }
145
146 void condense() {
147 MergedTable *Merged = getMergedTable();
148 if (!Merged)
149 Merged = new MergedTable;
150
151 // Read in all the tables and merge them together.
152 // FIXME: Be smarter about which tables we merge.
153 for (auto *ODT : tables()) {
154 auto &HT = ODT->Table;
155 Info &InfoObj = HT.getInfoObj();
156
157 for (auto I = HT.data_begin(), E = HT.data_end(); I != E; ++I) {
158 auto *LocalPtr = I.getItem();
159
160 // FIXME: Don't rely on the OnDiskHashTable format here.
161 auto L = InfoObj.ReadKeyDataLength(LocalPtr);
162 const internal_key_type &Key = InfoObj.ReadKey(LocalPtr, L.first);
163 data_type_builder ValueBuilder(Merged->Data[Key]);
164 InfoObj.ReadDataInto(Key, LocalPtr + L.first, L.second,
165 ValueBuilder);
166 }
167
168 Merged->Files.push_back(ODT->File);
169 delete ODT;
170 }
171
172 Tables.clear();
173 Tables.push_back(Table(Merged).getOpaqueValue());
174 }
175
176public:
177 MultiOnDiskHashTable() = default;
178
179 MultiOnDiskHashTable(MultiOnDiskHashTable &&O)
180 : Tables(std::move(O.Tables)),
181 PendingOverrides(std::move(O.PendingOverrides)) {
182 O.Tables.clear();
183 }
184
185 MultiOnDiskHashTable &operator=(MultiOnDiskHashTable &&O) {
186 if (&O == this)
187 return *this;
188 clear();
189 Tables = std::move(O.Tables);
190 O.Tables.clear();
191 PendingOverrides = std::move(O.PendingOverrides);
192 return *this;
193 }
194
195 ~MultiOnDiskHashTable() { clear(); }
196
197 /// \brief Add the table \p Data loaded from file \p File.
198 void add(file_type File, storage_type Data, Info InfoObj = Info()) {
199 using namespace llvm::support;
200
201 storage_type Ptr = Data;
202
203 uint32_t BucketOffset = endian::readNext<uint32_t, little, unaligned>(Ptr);
204
205 // Read the list of overridden files.
206 uint32_t NumFiles = endian::readNext<uint32_t, little, unaligned>(Ptr);
207 // FIXME: Add a reserve() to TinyPtrVector so that we don't need to make
208 // an additional copy.
209 llvm::SmallVector<file_type, 16> OverriddenFiles;
210 OverriddenFiles.reserve(NumFiles);
211 for (/**/; NumFiles != 0; --NumFiles)
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Assuming 'NumFiles' is equal to 0
10
Loop condition is false. Execution continues on line 213
212 OverriddenFiles.push_back(InfoObj.ReadFileRef(Ptr));
213 PendingOverrides.insert(PendingOverrides.end(), OverriddenFiles.begin(),
214 OverriddenFiles.end());
215
216 // Read the OnDiskChainedHashTable header.
217 storage_type Buckets = Data + BucketOffset;
218 auto NumBucketsAndEntries =
219 OnDiskTable::HashTable::readNumBucketsAndEntries(Buckets);
220
221 // Register the table.
222 Table NewTable = new OnDiskTable(File, NumBucketsAndEntries.first,
11
Memory is allocated
12
Potential memory leak
223 NumBucketsAndEntries.second,
224 Buckets, Ptr, Data, std::move(InfoObj));
225 Tables.push_back(NewTable.getOpaqueValue());
226 }
227
228 /// \brief Find and read the lookup results for \p EKey.
229 data_type find(const external_key_type &EKey) {
230 data_type Result;
231
232 if (!PendingOverrides.empty())
233 removeOverriddenTables();
234
235 if (Tables.size() > static_cast<unsigned>(Info::MaxTables))
236 condense();
237
238 internal_key_type Key = Info::GetInternalKey(EKey);
239 auto KeyHash = Info::ComputeHash(Key);
240
241 if (MergedTable *M = getMergedTable()) {
242 auto It = M->Data.find(Key);
243 if (It != M->Data.end())
244 Result = It->second;
245 }
246
247 data_type_builder ResultBuilder(Result);
248
249 for (auto *ODT : tables()) {
250 auto &HT = ODT->Table;
251 auto It = HT.find_hashed(Key, KeyHash);
252 if (It != HT.end())
253 HT.getInfoObj().ReadDataInto(Key, It.getDataPtr(), It.getDataLen(),
254 ResultBuilder);
255 }
256
257 return Result;
258 }
259
260 /// \brief Read all the lookup results into a single value. This only makes
261 /// sense if merging values across keys is meaningful.
262 data_type findAll() {
263 data_type Result;
264 data_type_builder ResultBuilder(Result);
265
266 if (!PendingOverrides.empty())
267 removeOverriddenTables();
268
269 if (MergedTable *M = getMergedTable()) {
270 for (auto &KV : M->Data)
271 Info::MergeDataInto(KV.second, ResultBuilder);
272 }
273
274 for (auto *ODT : tables()) {
275 auto &HT = ODT->Table;
276 Info &InfoObj = HT.getInfoObj();
277 for (auto I = HT.data_begin(), E = HT.data_end(); I != E; ++I) {
278 auto *LocalPtr = I.getItem();
279
280 // FIXME: Don't rely on the OnDiskHashTable format here.
281 auto L = InfoObj.ReadKeyDataLength(LocalPtr);
282 const internal_key_type &Key = InfoObj.ReadKey(LocalPtr, L.first);
283 InfoObj.ReadDataInto(Key, LocalPtr + L.first, L.second, ResultBuilder);
284 }
285 }
286
287 return Result;
288 }
289};
290
291/// \brief Writer for the on-disk hash table.
292template<typename ReaderInfo, typename WriterInfo>
293class MultiOnDiskHashTableGenerator {
294 using BaseTable = MultiOnDiskHashTable<ReaderInfo>;
295 using Generator = llvm::OnDiskChainedHashTableGenerator<WriterInfo>;
296
297 Generator Gen;
298
299public:
300 MultiOnDiskHashTableGenerator() : Gen() {}
301
302 void insert(typename WriterInfo::key_type_ref Key,
303 typename WriterInfo::data_type_ref Data, WriterInfo &Info) {
304 Gen.insert(Key, Data, Info);
305 }
306
307 void emit(llvm::SmallVectorImpl<char> &Out, WriterInfo &Info,
308 const BaseTable *Base) {
309 using namespace llvm::support;
310
311 llvm::raw_svector_ostream OutStream(Out);
312
313 // Write our header information.
314 {
315 endian::Writer<little> Writer(OutStream);
316
317 // Reserve four bytes for the bucket offset.
318 Writer.write<uint32_t>(0);
319
320 if (auto *Merged = Base ? Base->getMergedTable() : nullptr) {
321 // Write list of overridden files.
322 Writer.write<uint32_t>(Merged->Files.size());
323 for (const auto &F : Merged->Files)
324 Info.EmitFileRef(OutStream, F);
325
326 // Add all merged entries from Base to the generator.
327 for (auto &KV : Merged->Data) {
328 if (!Gen.contains(KV.first, Info))
329 Gen.insert(KV.first, Info.ImportData(KV.second), Info);
330 }
331 } else {
332 Writer.write<uint32_t>(0);
333 }
334 }
335
336 // Write the table itself.
337 uint32_t BucketOffset = Gen.Emit(OutStream, Info);
338
339 // Replace the first four bytes with the bucket offset.
340 endian::write32le(Out.data(), BucketOffset);
341 }
342};
343
344} // namespace serialization
345} // namespace clang
346
347#endif // LLVM_CLANG_LIB_SERIALIZATION_MULTIONDISKHASHTABLE_H