Bug Summary

File:build/source/clang/lib/Serialization/ASTReaderDecl.cpp
Warning:line 2707, column 16
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name ASTReaderDecl.cpp -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 -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/source/build-llvm -resource-dir /usr/lib/llvm-17/lib/clang/17 -D _DEBUG -D _GLIBCXX_ASSERTIONS -D _GNU_SOURCE -D _LIBCPP_ENABLE_ASSERTIONS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I tools/clang/lib/Serialization -I /build/source/clang/lib/Serialization -I /build/source/clang/include -I tools/clang/include -I include -I /build/source/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-17/lib/clang/17/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/source/build-llvm=build-llvm -fmacro-prefix-map=/build/source/= -fcoverage-prefix-map=/build/source/build-llvm=build-llvm -fcoverage-prefix-map=/build/source/= -source-date-epoch 1679443490 -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -Wno-misleading-indentation -std=c++17 -fdeprecated-macro -fdebug-compilation-dir=/build/source/build-llvm -fdebug-prefix-map=/build/source/build-llvm=build-llvm -fdebug-prefix-map=/build/source/= -fdebug-prefix-map=/build/source/build-llvm=build-llvm -fdebug-prefix-map=/build/source/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2023-03-22-005342-16304-1 -x c++ /build/source/clang/lib/Serialization/ASTReaderDecl.cpp
1//===- ASTReaderDecl.cpp - Decl Deserialization ---------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the ASTReader::readDeclRecord method, which is the
10// entrypoint for loading a decl.
11//
12//===----------------------------------------------------------------------===//
13
14#include "ASTCommon.h"
15#include "ASTReaderInternals.h"
16#include "clang/AST/ASTContext.h"
17#include "clang/AST/ASTStructuralEquivalence.h"
18#include "clang/AST/Attr.h"
19#include "clang/AST/AttrIterator.h"
20#include "clang/AST/Decl.h"
21#include "clang/AST/DeclBase.h"
22#include "clang/AST/DeclCXX.h"
23#include "clang/AST/DeclFriend.h"
24#include "clang/AST/DeclObjC.h"
25#include "clang/AST/DeclOpenMP.h"
26#include "clang/AST/DeclTemplate.h"
27#include "clang/AST/DeclVisitor.h"
28#include "clang/AST/DeclarationName.h"
29#include "clang/AST/Expr.h"
30#include "clang/AST/ExternalASTSource.h"
31#include "clang/AST/LambdaCapture.h"
32#include "clang/AST/NestedNameSpecifier.h"
33#include "clang/AST/OpenMPClause.h"
34#include "clang/AST/Redeclarable.h"
35#include "clang/AST/Stmt.h"
36#include "clang/AST/TemplateBase.h"
37#include "clang/AST/Type.h"
38#include "clang/AST/UnresolvedSet.h"
39#include "clang/Basic/AttrKinds.h"
40#include "clang/Basic/DiagnosticSema.h"
41#include "clang/Basic/ExceptionSpecificationType.h"
42#include "clang/Basic/IdentifierTable.h"
43#include "clang/Basic/LLVM.h"
44#include "clang/Basic/Lambda.h"
45#include "clang/Basic/LangOptions.h"
46#include "clang/Basic/Linkage.h"
47#include "clang/Basic/Module.h"
48#include "clang/Basic/PragmaKinds.h"
49#include "clang/Basic/SourceLocation.h"
50#include "clang/Basic/Specifiers.h"
51#include "clang/Sema/IdentifierResolver.h"
52#include "clang/Serialization/ASTBitCodes.h"
53#include "clang/Serialization/ASTRecordReader.h"
54#include "clang/Serialization/ContinuousRangeMap.h"
55#include "clang/Serialization/ModuleFile.h"
56#include "llvm/ADT/DenseMap.h"
57#include "llvm/ADT/FoldingSet.h"
58#include "llvm/ADT/STLExtras.h"
59#include "llvm/ADT/SmallPtrSet.h"
60#include "llvm/ADT/SmallVector.h"
61#include "llvm/ADT/iterator_range.h"
62#include "llvm/Bitstream/BitstreamReader.h"
63#include "llvm/Support/Casting.h"
64#include "llvm/Support/ErrorHandling.h"
65#include "llvm/Support/SaveAndRestore.h"
66#include <algorithm>
67#include <cassert>
68#include <cstdint>
69#include <cstring>
70#include <string>
71#include <utility>
72
73using namespace clang;
74using namespace serialization;
75
76//===----------------------------------------------------------------------===//
77// Declaration deserialization
78//===----------------------------------------------------------------------===//
79
80namespace clang {
81
82 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
83 ASTReader &Reader;
84 ASTRecordReader &Record;
85 ASTReader::RecordLocation Loc;
86 const DeclID ThisDeclID;
87 const SourceLocation ThisDeclLoc;
88
89 using RecordData = ASTReader::RecordData;
90
91 TypeID DeferredTypeID = 0;
92 unsigned AnonymousDeclNumber;
93 GlobalDeclID NamedDeclForTagDecl = 0;
94 IdentifierInfo *TypedefNameForLinkage = nullptr;
95
96 bool HasPendingBody = false;
97
98 ///A flag to carry the information for a decl from the entity is
99 /// used. We use it to delay the marking of the canonical decl as used until
100 /// the entire declaration is deserialized and merged.
101 bool IsDeclMarkedUsed = false;
102
103 uint64_t GetCurrentCursorOffset();
104
105 uint64_t ReadLocalOffset() {
106 uint64_t LocalOffset = Record.readInt();
107 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 107, __extension__
__PRETTY_FUNCTION__))
;
108 return LocalOffset ? Loc.Offset - LocalOffset : 0;
109 }
110
111 uint64_t ReadGlobalOffset() {
112 uint64_t Local = ReadLocalOffset();
113 return Local ? Record.getGlobalBitOffset(Local) : 0;
114 }
115
116 SourceLocation readSourceLocation() {
117 return Record.readSourceLocation();
118 }
119
120 SourceRange readSourceRange() {
121 return Record.readSourceRange();
122 }
123
124 TypeSourceInfo *readTypeSourceInfo() {
125 return Record.readTypeSourceInfo();
126 }
127
128 serialization::DeclID readDeclID() {
129 return Record.readDeclID();
130 }
131
132 std::string readString() {
133 return Record.readString();
134 }
135
136 void readDeclIDList(SmallVectorImpl<DeclID> &IDs) {
137 for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
138 IDs.push_back(readDeclID());
139 }
140
141 Decl *readDecl() {
142 return Record.readDecl();
143 }
144
145 template<typename T>
146 T *readDeclAs() {
147 return Record.readDeclAs<T>();
148 }
149
150 serialization::SubmoduleID readSubmoduleID() {
151 if (Record.getIdx() == Record.size())
152 return 0;
153
154 return Record.getGlobalSubmoduleID(Record.readInt());
155 }
156
157 Module *readModule() {
158 return Record.getSubmodule(readSubmoduleID());
159 }
160
161 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
162 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
163 const CXXRecordDecl *D);
164 void MergeDefinitionData(CXXRecordDecl *D,
165 struct CXXRecordDecl::DefinitionData &&NewDD);
166 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
167 void MergeDefinitionData(ObjCInterfaceDecl *D,
168 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
169 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
170 void MergeDefinitionData(ObjCProtocolDecl *D,
171 struct ObjCProtocolDecl::DefinitionData &&NewDD);
172
173 static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
174
175 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
176 DeclContext *DC,
177 unsigned Index);
178 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
179 unsigned Index, NamedDecl *D);
180
181 /// Results from loading a RedeclarableDecl.
182 class RedeclarableResult {
183 Decl *MergeWith;
184 GlobalDeclID FirstID;
185 bool IsKeyDecl;
186
187 public:
188 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
189 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
190
191 /// Retrieve the first ID.
192 GlobalDeclID getFirstID() const { return FirstID; }
193
194 /// Is this declaration a key declaration?
195 bool isKeyDecl() const { return IsKeyDecl; }
196
197 /// Get a known declaration that this should be merged with, if
198 /// any.
199 Decl *getKnownMergeTarget() const { return MergeWith; }
200 };
201
202 /// Class used to capture the result of searching for an existing
203 /// declaration of a specific kind and name, along with the ability
204 /// to update the place where this result was found (the declaration
205 /// chain hanging off an identifier or the DeclContext we searched in)
206 /// if requested.
207 class FindExistingResult {
208 ASTReader &Reader;
209 NamedDecl *New = nullptr;
210 NamedDecl *Existing = nullptr;
211 bool AddResult = false;
212 unsigned AnonymousDeclNumber = 0;
213 IdentifierInfo *TypedefNameForLinkage = nullptr;
214
215 public:
216 FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
217
218 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
219 unsigned AnonymousDeclNumber,
220 IdentifierInfo *TypedefNameForLinkage)
221 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
222 AnonymousDeclNumber(AnonymousDeclNumber),
223 TypedefNameForLinkage(TypedefNameForLinkage) {}
224
225 FindExistingResult(FindExistingResult &&Other)
226 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
227 AddResult(Other.AddResult),
228 AnonymousDeclNumber(Other.AnonymousDeclNumber),
229 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
230 Other.AddResult = false;
231 }
232
233 FindExistingResult &operator=(FindExistingResult &&) = delete;
234 ~FindExistingResult();
235
236 /// Suppress the addition of this result into the known set of
237 /// names.
238 void suppress() { AddResult = false; }
239
240 operator NamedDecl*() const { return Existing; }
241
242 template<typename T>
243 operator T*() const { return dyn_cast_or_null<T>(Existing); }
244 };
245
246 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
247 DeclContext *DC);
248 FindExistingResult findExisting(NamedDecl *D);
249
250 public:
251 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
252 ASTReader::RecordLocation Loc,
253 DeclID thisDeclID, SourceLocation ThisDeclLoc)
254 : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
255 ThisDeclLoc(ThisDeclLoc) {}
256
257 template <typename T> static
258 void AddLazySpecializations(T *D,
259 SmallVectorImpl<serialization::DeclID>& IDs) {
260 if (IDs.empty())
261 return;
262
263 // FIXME: We should avoid this pattern of getting the ASTContext.
264 ASTContext &C = D->getASTContext();
265
266 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
267
268 if (auto &Old = LazySpecializations) {
269 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
270 llvm::sort(IDs);
271 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
272 }
273
274 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
275 *Result = IDs.size();
276 std::copy(IDs.begin(), IDs.end(), Result + 1);
277
278 LazySpecializations = Result;
279 }
280
281 template <typename DeclT>
282 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
283 static Decl *getMostRecentDeclImpl(...);
284 static Decl *getMostRecentDecl(Decl *D);
285
286 static void mergeInheritableAttributes(ASTReader &Reader, Decl *D,
287 Decl *Previous);
288
289 template <typename DeclT>
290 static void attachPreviousDeclImpl(ASTReader &Reader,
291 Redeclarable<DeclT> *D, Decl *Previous,
292 Decl *Canon);
293 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
294 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
295 Decl *Canon);
296
297 template <typename DeclT>
298 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
299 static void attachLatestDeclImpl(...);
300 static void attachLatestDecl(Decl *D, Decl *latest);
301
302 template <typename DeclT>
303 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
304 static void markIncompleteDeclChainImpl(...);
305
306 /// Determine whether this declaration has a pending body.
307 bool hasPendingBody() const { return HasPendingBody; }
308
309 void ReadFunctionDefinition(FunctionDecl *FD);
310 void Visit(Decl *D);
311
312 void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
313
314 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
315 ObjCCategoryDecl *Next) {
316 Cat->NextClassCategory = Next;
317 }
318
319 void VisitDecl(Decl *D);
320 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
321 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
322 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
323 void VisitNamedDecl(NamedDecl *ND);
324 void VisitLabelDecl(LabelDecl *LD);
325 void VisitNamespaceDecl(NamespaceDecl *D);
326 void VisitHLSLBufferDecl(HLSLBufferDecl *D);
327 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
328 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
329 void VisitTypeDecl(TypeDecl *TD);
330 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
331 void VisitTypedefDecl(TypedefDecl *TD);
332 void VisitTypeAliasDecl(TypeAliasDecl *TD);
333 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
334 void VisitUnresolvedUsingIfExistsDecl(UnresolvedUsingIfExistsDecl *D);
335 RedeclarableResult VisitTagDecl(TagDecl *TD);
336 void VisitEnumDecl(EnumDecl *ED);
337 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
338 void VisitRecordDecl(RecordDecl *RD);
339 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
340 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
341 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
342 ClassTemplateSpecializationDecl *D);
343
344 void VisitClassTemplateSpecializationDecl(
345 ClassTemplateSpecializationDecl *D) {
346 VisitClassTemplateSpecializationDeclImpl(D);
347 }
348
349 void VisitClassTemplatePartialSpecializationDecl(
350 ClassTemplatePartialSpecializationDecl *D);
351 void VisitClassScopeFunctionSpecializationDecl(
352 ClassScopeFunctionSpecializationDecl *D);
353 RedeclarableResult
354 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
355
356 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
357 VisitVarTemplateSpecializationDeclImpl(D);
358 }
359
360 void VisitVarTemplatePartialSpecializationDecl(
361 VarTemplatePartialSpecializationDecl *D);
362 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
363 void VisitValueDecl(ValueDecl *VD);
364 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
365 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
366 void VisitDeclaratorDecl(DeclaratorDecl *DD);
367 void VisitFunctionDecl(FunctionDecl *FD);
368 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
369 void VisitCXXMethodDecl(CXXMethodDecl *D);
370 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
371 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
372 void VisitCXXConversionDecl(CXXConversionDecl *D);
373 void VisitFieldDecl(FieldDecl *FD);
374 void VisitMSPropertyDecl(MSPropertyDecl *FD);
375 void VisitMSGuidDecl(MSGuidDecl *D);
376 void VisitUnnamedGlobalConstantDecl(UnnamedGlobalConstantDecl *D);
377 void VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D);
378 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
379 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
380 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
381 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
382 void VisitParmVarDecl(ParmVarDecl *PD);
383 void VisitDecompositionDecl(DecompositionDecl *DD);
384 void VisitBindingDecl(BindingDecl *BD);
385 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
386 void VisitTemplateDecl(TemplateDecl *D);
387 void VisitConceptDecl(ConceptDecl *D);
388 void VisitImplicitConceptSpecializationDecl(
389 ImplicitConceptSpecializationDecl *D);
390 void VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D);
391 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
392 void VisitClassTemplateDecl(ClassTemplateDecl *D);
393 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
394 void VisitVarTemplateDecl(VarTemplateDecl *D);
395 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
396 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
397 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
398 void VisitUsingDecl(UsingDecl *D);
399 void VisitUsingEnumDecl(UsingEnumDecl *D);
400 void VisitUsingPackDecl(UsingPackDecl *D);
401 void VisitUsingShadowDecl(UsingShadowDecl *D);
402 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
403 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
404 void VisitExportDecl(ExportDecl *D);
405 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
406 void VisitTopLevelStmtDecl(TopLevelStmtDecl *D);
407 void VisitImportDecl(ImportDecl *D);
408 void VisitAccessSpecDecl(AccessSpecDecl *D);
409 void VisitFriendDecl(FriendDecl *D);
410 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
411 void VisitStaticAssertDecl(StaticAssertDecl *D);
412 void VisitBlockDecl(BlockDecl *BD);
413 void VisitCapturedDecl(CapturedDecl *CD);
414 void VisitEmptyDecl(EmptyDecl *D);
415 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
416
417 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
418
419 template<typename T>
420 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
421
422 template <typename T>
423 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl);
424
425 void mergeRedeclarableTemplate(RedeclarableTemplateDecl *D,
426 RedeclarableResult &Redecl);
427
428 template <typename T>
429 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
430 RedeclarableResult &Redecl);
431
432 template<typename T>
433 void mergeMergeable(Mergeable<T> *D);
434
435 void mergeMergeable(LifetimeExtendedTemporaryDecl *D);
436
437 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
438 RedeclarableTemplateDecl *Existing,
439 bool IsKeyDecl);
440
441 ObjCTypeParamList *ReadObjCTypeParamList();
442
443 // FIXME: Reorder according to DeclNodes.td?
444 void VisitObjCMethodDecl(ObjCMethodDecl *D);
445 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
446 void VisitObjCContainerDecl(ObjCContainerDecl *D);
447 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
448 void VisitObjCIvarDecl(ObjCIvarDecl *D);
449 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
450 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
451 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
452 void VisitObjCImplDecl(ObjCImplDecl *D);
453 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
454 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
455 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
456 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
457 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
458 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
459 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
460 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
461 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
462 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
463 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
464 };
465
466} // namespace clang
467
468namespace {
469
470/// Iterator over the redeclarations of a declaration that have already
471/// been merged into the same redeclaration chain.
472template<typename DeclT>
473class MergedRedeclIterator {
474 DeclT *Start;
475 DeclT *Canonical = nullptr;
476 DeclT *Current = nullptr;
477
478public:
479 MergedRedeclIterator() = default;
480 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
481
482 DeclT *operator*() { return Current; }
483
484 MergedRedeclIterator &operator++() {
485 if (Current->isFirstDecl()) {
486 Canonical = Current;
487 Current = Current->getMostRecentDecl();
488 } else
489 Current = Current->getPreviousDecl();
490
491 // If we started in the merged portion, we'll reach our start position
492 // eventually. Otherwise, we'll never reach it, but the second declaration
493 // we reached was the canonical declaration, so stop when we see that one
494 // again.
495 if (Current == Start || Current == Canonical)
496 Current = nullptr;
497 return *this;
498 }
499
500 friend bool operator!=(const MergedRedeclIterator &A,
501 const MergedRedeclIterator &B) {
502 return A.Current != B.Current;
503 }
504};
505
506} // namespace
507
508template <typename DeclT>
509static llvm::iterator_range<MergedRedeclIterator<DeclT>>
510merged_redecls(DeclT *D) {
511 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
512 MergedRedeclIterator<DeclT>());
513}
514
515uint64_t ASTDeclReader::GetCurrentCursorOffset() {
516 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
517}
518
519void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
520 if (Record.readInt()) {
521 Reader.DefinitionSource[FD] =
522 Loc.F->Kind == ModuleKind::MK_MainFile ||
523 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
524 }
525 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
526 CD->setNumCtorInitializers(Record.readInt());
527 if (CD->getNumCtorInitializers())
528 CD->CtorInitializers = ReadGlobalOffset();
529 }
530 // Store the offset of the body so we can lazily load it later.
531 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
532 HasPendingBody = true;
533}
534
535void ASTDeclReader::Visit(Decl *D) {
536 DeclVisitor<ASTDeclReader, void>::Visit(D);
537
538 // At this point we have deserialized and merged the decl and it is safe to
539 // update its canonical decl to signal that the entire entity is used.
540 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
541 IsDeclMarkedUsed = false;
542
543 if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
544 if (auto *TInfo = DD->getTypeSourceInfo())
545 Record.readTypeLoc(TInfo->getTypeLoc());
546 }
547
548 if (auto *TD = dyn_cast<TypeDecl>(D)) {
549 // We have a fully initialized TypeDecl. Read its type now.
550 TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
551
552 // If this is a tag declaration with a typedef name for linkage, it's safe
553 // to load that typedef now.
554 if (NamedDeclForTagDecl)
555 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
556 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
557 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
558 // if we have a fully initialized TypeDecl, we can safely read its type now.
559 ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
560 } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
561 // FunctionDecl's body was written last after all other Stmts/Exprs.
562 // We only read it if FD doesn't already have a body (e.g., from another
563 // module).
564 // FIXME: Can we diagnose ODR violations somehow?
565 if (Record.readInt())
566 ReadFunctionDefinition(FD);
567 }
568}
569
570void ASTDeclReader::VisitDecl(Decl *D) {
571 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
572 isa<ParmVarDecl, ObjCTypeParamDecl>(D)) {
573 // We don't want to deserialize the DeclContext of a template
574 // parameter or of a parameter of a function template immediately. These
575 // entities might be used in the formulation of its DeclContext (for
576 // example, a function parameter can be used in decltype() in trailing
577 // return type of the function). Use the translation unit DeclContext as a
578 // placeholder.
579 GlobalDeclID SemaDCIDForTemplateParmDecl = readDeclID();
580 GlobalDeclID LexicalDCIDForTemplateParmDecl = readDeclID();
581 if (!LexicalDCIDForTemplateParmDecl)
582 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
583 Reader.addPendingDeclContextInfo(D,
584 SemaDCIDForTemplateParmDecl,
585 LexicalDCIDForTemplateParmDecl);
586 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
587 } else {
588 auto *SemaDC = readDeclAs<DeclContext>();
589 auto *LexicalDC = readDeclAs<DeclContext>();
590 if (!LexicalDC)
591 LexicalDC = SemaDC;
592 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
593 // Avoid calling setLexicalDeclContext() directly because it uses
594 // Decl::getASTContext() internally which is unsafe during derialization.
595 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
596 Reader.getContext());
597 }
598 D->setLocation(ThisDeclLoc);
599 D->InvalidDecl = Record.readInt();
600 if (Record.readInt()) { // hasAttrs
601 AttrVec Attrs;
602 Record.readAttributes(Attrs);
603 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
604 // internally which is unsafe during derialization.
605 D->setAttrsImpl(Attrs, Reader.getContext());
606 }
607 D->setImplicit(Record.readInt());
608 D->Used = Record.readInt();
609 IsDeclMarkedUsed |= D->Used;
610 D->setReferenced(Record.readInt());
611 D->setTopLevelDeclInObjCContainer(Record.readInt());
612 D->setAccess((AccessSpecifier)Record.readInt());
613 D->FromASTFile = true;
614 auto ModuleOwnership = (Decl::ModuleOwnershipKind)Record.readInt();
615 bool ModulePrivate =
616 (ModuleOwnership == Decl::ModuleOwnershipKind::ModulePrivate);
617
618 // Determine whether this declaration is part of a (sub)module. If so, it
619 // may not yet be visible.
620 if (unsigned SubmoduleID = readSubmoduleID()) {
621
622 switch (ModuleOwnership) {
623 case Decl::ModuleOwnershipKind::Visible:
624 ModuleOwnership = Decl::ModuleOwnershipKind::VisibleWhenImported;
625 break;
626 case Decl::ModuleOwnershipKind::Unowned:
627 case Decl::ModuleOwnershipKind::VisibleWhenImported:
628 case Decl::ModuleOwnershipKind::ReachableWhenImported:
629 case Decl::ModuleOwnershipKind::ModulePrivate:
630 break;
631 }
632
633 D->setModuleOwnershipKind(ModuleOwnership);
634 // Store the owning submodule ID in the declaration.
635 D->setOwningModuleID(SubmoduleID);
636
637 if (ModulePrivate) {
638 // Module-private declarations are never visible, so there is no work to
639 // do.
640 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
641 // If local visibility is being tracked, this declaration will become
642 // hidden and visible as the owning module does.
643 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
644 // Mark the declaration as visible when its owning module becomes visible.
645 if (Owner->NameVisibility == Module::AllVisible)
646 D->setVisibleDespiteOwningModule();
647 else
648 Reader.HiddenNamesMap[Owner].push_back(D);
649 }
650 } else if (ModulePrivate) {
651 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
652 }
653}
654
655void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
656 VisitDecl(D);
657 D->setLocation(readSourceLocation());
658 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
659 std::string Arg = readString();
660 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
661 D->getTrailingObjects<char>()[Arg.size()] = '\0';
662}
663
664void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
665 VisitDecl(D);
666 D->setLocation(readSourceLocation());
667 std::string Name = readString();
668 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
669 D->getTrailingObjects<char>()[Name.size()] = '\0';
670
671 D->ValueStart = Name.size() + 1;
672 std::string Value = readString();
673 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
674 Value.size());
675 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
676}
677
678void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
679 llvm_unreachable("Translation units are not serialized")::llvm::llvm_unreachable_internal("Translation units are not serialized"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 679)
;
680}
681
682void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
683 VisitDecl(ND);
684 ND->setDeclName(Record.readDeclarationName());
685 AnonymousDeclNumber = Record.readInt();
686}
687
688void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
689 VisitNamedDecl(TD);
690 TD->setLocStart(readSourceLocation());
691 // Delay type reading until after we have fully initialized the decl.
692 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
693}
694
695ASTDeclReader::RedeclarableResult
696ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
697 RedeclarableResult Redecl = VisitRedeclarable(TD);
698 VisitTypeDecl(TD);
699 TypeSourceInfo *TInfo = readTypeSourceInfo();
700 if (Record.readInt()) { // isModed
701 QualType modedT = Record.readType();
702 TD->setModedTypeSourceInfo(TInfo, modedT);
703 } else
704 TD->setTypeSourceInfo(TInfo);
705 // Read and discard the declaration for which this is a typedef name for
706 // linkage, if it exists. We cannot rely on our type to pull in this decl,
707 // because it might have been merged with a type from another module and
708 // thus might not refer to our version of the declaration.
709 readDecl();
710 return Redecl;
711}
712
713void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
714 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
715 mergeRedeclarable(TD, Redecl);
716}
717
718void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
719 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
720 if (auto *Template = readDeclAs<TypeAliasTemplateDecl>())
721 // Merged when we merge the template.
722 TD->setDescribedAliasTemplate(Template);
723 else
724 mergeRedeclarable(TD, Redecl);
725}
726
727ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
728 RedeclarableResult Redecl = VisitRedeclarable(TD);
729 VisitTypeDecl(TD);
730
731 TD->IdentifierNamespace = Record.readInt();
732 TD->setTagKind((TagDecl::TagKind)Record.readInt());
733 if (!isa<CXXRecordDecl>(TD))
734 TD->setCompleteDefinition(Record.readInt());
735 TD->setEmbeddedInDeclarator(Record.readInt());
736 TD->setFreeStanding(Record.readInt());
737 TD->setCompleteDefinitionRequired(Record.readInt());
738 TD->setBraceRange(readSourceRange());
739
740 switch (Record.readInt()) {
741 case 0:
742 break;
743 case 1: { // ExtInfo
744 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
745 Record.readQualifierInfo(*Info);
746 TD->TypedefNameDeclOrQualifier = Info;
747 break;
748 }
749 case 2: // TypedefNameForAnonDecl
750 NamedDeclForTagDecl = readDeclID();
751 TypedefNameForLinkage = Record.readIdentifier();
752 break;
753 default:
754 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"clang/lib/Serialization/ASTReaderDecl.cpp", 754)
;
755 }
756
757 if (!isa<CXXRecordDecl>(TD))
758 mergeRedeclarable(TD, Redecl);
759 return Redecl;
760}
761
762void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
763 VisitTagDecl(ED);
764 if (TypeSourceInfo *TI = readTypeSourceInfo())
765 ED->setIntegerTypeSourceInfo(TI);
766 else
767 ED->setIntegerType(Record.readType());
768 ED->setPromotionType(Record.readType());
769 ED->setNumPositiveBits(Record.readInt());
770 ED->setNumNegativeBits(Record.readInt());
771 ED->setScoped(Record.readInt());
772 ED->setScopedUsingClassTag(Record.readInt());
773 ED->setFixed(Record.readInt());
774
775 ED->setHasODRHash(true);
776 ED->ODRHash = Record.readInt();
777
778 // If this is a definition subject to the ODR, and we already have a
779 // definition, merge this one into it.
780 if (ED->isCompleteDefinition() &&
781 Reader.getContext().getLangOpts().Modules &&
782 Reader.getContext().getLangOpts().CPlusPlus) {
783 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
784 if (!OldDef) {
785 // This is the first time we've seen an imported definition. Look for a
786 // local definition before deciding that we are the first definition.
787 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
788 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
789 OldDef = D;
790 break;
791 }
792 }
793 }
794 if (OldDef) {
795 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
796 ED->demoteThisDefinitionToDeclaration();
797 Reader.mergeDefinitionVisibility(OldDef, ED);
798 if (OldDef->getODRHash() != ED->getODRHash())
799 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
800 } else {
801 OldDef = ED;
802 }
803 }
804
805 if (auto *InstED = readDeclAs<EnumDecl>()) {
806 auto TSK = (TemplateSpecializationKind)Record.readInt();
807 SourceLocation POI = readSourceLocation();
808 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
809 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
810 }
811}
812
813ASTDeclReader::RedeclarableResult
814ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
815 RedeclarableResult Redecl = VisitTagDecl(RD);
816 RD->setHasFlexibleArrayMember(Record.readInt());
817 RD->setAnonymousStructOrUnion(Record.readInt());
818 RD->setHasObjectMember(Record.readInt());
819 RD->setHasVolatileMember(Record.readInt());
820 RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
821 RD->setNonTrivialToPrimitiveCopy(Record.readInt());
822 RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
823 RD->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(Record.readInt());
824 RD->setHasNonTrivialToPrimitiveDestructCUnion(Record.readInt());
825 RD->setHasNonTrivialToPrimitiveCopyCUnion(Record.readInt());
826 RD->setParamDestroyedInCallee(Record.readInt());
827 RD->setArgPassingRestrictions((RecordDecl::ArgPassingKind)Record.readInt());
828 return Redecl;
829}
830
831void ASTDeclReader::VisitRecordDecl(RecordDecl *RD) {
832 VisitRecordDeclImpl(RD);
833 RD->setODRHash(Record.readInt());
834
835 // Maintain the invariant of a redeclaration chain containing only
836 // a single definition.
837 if (RD->isCompleteDefinition()) {
838 RecordDecl *Canon = static_cast<RecordDecl *>(RD->getCanonicalDecl());
839 RecordDecl *&OldDef = Reader.RecordDefinitions[Canon];
840 if (!OldDef) {
841 // This is the first time we've seen an imported definition. Look for a
842 // local definition before deciding that we are the first definition.
843 for (auto *D : merged_redecls(Canon)) {
844 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
845 OldDef = D;
846 break;
847 }
848 }
849 }
850 if (OldDef) {
851 Reader.MergedDeclContexts.insert(std::make_pair(RD, OldDef));
852 RD->demoteThisDefinitionToDeclaration();
853 Reader.mergeDefinitionVisibility(OldDef, RD);
854 if (OldDef->getODRHash() != RD->getODRHash())
855 Reader.PendingRecordOdrMergeFailures[OldDef].push_back(RD);
856 } else {
857 OldDef = RD;
858 }
859 }
860}
861
862void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
863 VisitNamedDecl(VD);
864 // For function declarations, defer reading the type in case the function has
865 // a deduced return type that references an entity declared within the
866 // function.
867 if (isa<FunctionDecl>(VD))
868 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
869 else
870 VD->setType(Record.readType());
871}
872
873void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
874 VisitValueDecl(ECD);
875 if (Record.readInt())
876 ECD->setInitExpr(Record.readExpr());
877 ECD->setInitVal(Record.readAPSInt());
878 mergeMergeable(ECD);
879}
880
881void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
882 VisitValueDecl(DD);
883 DD->setInnerLocStart(readSourceLocation());
884 if (Record.readInt()) { // hasExtInfo
885 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
886 Record.readQualifierInfo(*Info);
887 Info->TrailingRequiresClause = Record.readExpr();
888 DD->DeclInfo = Info;
889 }
890 QualType TSIType = Record.readType();
891 DD->setTypeSourceInfo(
892 TSIType.isNull() ? nullptr
893 : Reader.getContext().CreateTypeSourceInfo(TSIType));
894}
895
896void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
897 RedeclarableResult Redecl = VisitRedeclarable(FD);
898
899 FunctionDecl *Existing = nullptr;
900
901 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
902 case FunctionDecl::TK_NonTemplate:
903 break;
904 case FunctionDecl::TK_DependentNonTemplate:
905 FD->setInstantiatedFromDecl(readDeclAs<FunctionDecl>());
906 break;
907 case FunctionDecl::TK_FunctionTemplate: {
908 auto *Template = readDeclAs<FunctionTemplateDecl>();
909 Template->init(FD);
910 FD->setDescribedFunctionTemplate(Template);
911 break;
912 }
913 case FunctionDecl::TK_MemberSpecialization: {
914 auto *InstFD = readDeclAs<FunctionDecl>();
915 auto TSK = (TemplateSpecializationKind)Record.readInt();
916 SourceLocation POI = readSourceLocation();
917 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
918 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
919 break;
920 }
921 case FunctionDecl::TK_FunctionTemplateSpecialization: {
922 auto *Template = readDeclAs<FunctionTemplateDecl>();
923 auto TSK = (TemplateSpecializationKind)Record.readInt();
924
925 // Template arguments.
926 SmallVector<TemplateArgument, 8> TemplArgs;
927 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
928
929 // Template args as written.
930 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
931 SourceLocation LAngleLoc, RAngleLoc;
932 bool HasTemplateArgumentsAsWritten = Record.readInt();
933 if (HasTemplateArgumentsAsWritten) {
934 unsigned NumTemplateArgLocs = Record.readInt();
935 TemplArgLocs.reserve(NumTemplateArgLocs);
936 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
937 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
938
939 LAngleLoc = readSourceLocation();
940 RAngleLoc = readSourceLocation();
941 }
942
943 SourceLocation POI = readSourceLocation();
944
945 ASTContext &C = Reader.getContext();
946 TemplateArgumentList *TemplArgList
947 = TemplateArgumentList::CreateCopy(C, TemplArgs);
948 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
949 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
950 TemplArgsInfo.addArgument(TemplArgLocs[i]);
951
952 MemberSpecializationInfo *MSInfo = nullptr;
953 if (Record.readInt()) {
954 auto *FD = readDeclAs<FunctionDecl>();
955 auto TSK = (TemplateSpecializationKind)Record.readInt();
956 SourceLocation POI = readSourceLocation();
957
958 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
959 MSInfo->setPointOfInstantiation(POI);
960 }
961
962 FunctionTemplateSpecializationInfo *FTInfo =
963 FunctionTemplateSpecializationInfo::Create(
964 C, FD, Template, TSK, TemplArgList,
965 HasTemplateArgumentsAsWritten ? &TemplArgsInfo : nullptr, POI,
966 MSInfo);
967 FD->TemplateOrSpecialization = FTInfo;
968
969 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
970 // The template that contains the specializations set. It's not safe to
971 // use getCanonicalDecl on Template since it may still be initializing.
972 auto *CanonTemplate = readDeclAs<FunctionTemplateDecl>();
973 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
974 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
975 // FunctionTemplateSpecializationInfo's Profile().
976 // We avoid getASTContext because a decl in the parent hierarchy may
977 // be initializing.
978 llvm::FoldingSetNodeID ID;
979 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
980 void *InsertPos = nullptr;
981 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
982 FunctionTemplateSpecializationInfo *ExistingInfo =
983 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
984 if (InsertPos)
985 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
986 else {
987 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 988, __extension__
__PRETTY_FUNCTION__))
988 "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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 988, __extension__
__PRETTY_FUNCTION__))
;
989 Existing = ExistingInfo->getFunction();
990 }
991 }
992 break;
993 }
994 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
995 // Templates.
996 UnresolvedSet<8> TemplDecls;
997 unsigned NumTemplates = Record.readInt();
998 while (NumTemplates--)
999 TemplDecls.addDecl(readDeclAs<NamedDecl>());
1000
1001 // Templates args.
1002 TemplateArgumentListInfo TemplArgs;
1003 unsigned NumArgs = Record.readInt();
1004 while (NumArgs--)
1005 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
1006 TemplArgs.setLAngleLoc(readSourceLocation());
1007 TemplArgs.setRAngleLoc(readSourceLocation());
1008
1009 FD->setDependentTemplateSpecialization(Reader.getContext(),
1010 TemplDecls, TemplArgs);
1011 // These are not merged; we don't need to merge redeclarations of dependent
1012 // template friends.
1013 break;
1014 }
1015 }
1016
1017 VisitDeclaratorDecl(FD);
1018
1019 // Attach a type to this function. Use the real type if possible, but fall
1020 // back to the type as written if it involves a deduced return type.
1021 if (FD->getTypeSourceInfo() && FD->getTypeSourceInfo()
1022 ->getType()
1023 ->castAs<FunctionType>()
1024 ->getReturnType()
1025 ->getContainedAutoType()) {
1026 // We'll set up the real type in Visit, once we've finished loading the
1027 // function.
1028 FD->setType(FD->getTypeSourceInfo()->getType());
1029 Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
1030 } else {
1031 FD->setType(Reader.GetType(DeferredTypeID));
1032 }
1033 DeferredTypeID = 0;
1034
1035 FD->DNLoc = Record.readDeclarationNameLoc(FD->getDeclName());
1036 FD->IdentifierNamespace = Record.readInt();
1037
1038 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
1039 // after everything else is read.
1040
1041 FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
1042 FD->setInlineSpecified(Record.readInt());
1043 FD->setImplicitlyInline(Record.readInt());
1044 FD->setVirtualAsWritten(Record.readInt());
1045 // We defer calling `FunctionDecl::setPure()` here as for methods of
1046 // `CXXTemplateSpecializationDecl`s, we may not have connected up the
1047 // definition (which is required for `setPure`).
1048 const bool Pure = Record.readInt();
1049 FD->setHasInheritedPrototype(Record.readInt());
1050 FD->setHasWrittenPrototype(Record.readInt());
1051 FD->setDeletedAsWritten(Record.readInt());
1052 FD->setTrivial(Record.readInt());
1053 FD->setTrivialForCall(Record.readInt());
1054 FD->setDefaulted(Record.readInt());
1055 FD->setExplicitlyDefaulted(Record.readInt());
1056 FD->setIneligibleOrNotSelected(Record.readInt());
1057 FD->setHasImplicitReturnZero(Record.readInt());
1058 FD->setConstexprKind(static_cast<ConstexprSpecKind>(Record.readInt()));
1059 FD->setUsesSEHTry(Record.readInt());
1060 FD->setHasSkippedBody(Record.readInt());
1061 FD->setIsMultiVersion(Record.readInt());
1062 FD->setLateTemplateParsed(Record.readInt());
1063 FD->setFriendConstraintRefersToEnclosingTemplate(Record.readInt());
1064
1065 FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
1066 FD->EndRangeLoc = readSourceLocation();
1067 FD->setDefaultLoc(readSourceLocation());
1068
1069 FD->ODRHash = Record.readInt();
1070 FD->setHasODRHash(true);
1071
1072 if (FD->isDefaulted()) {
1073 if (unsigned NumLookups = Record.readInt()) {
1074 SmallVector<DeclAccessPair, 8> Lookups;
1075 for (unsigned I = 0; I != NumLookups; ++I) {
1076 NamedDecl *ND = Record.readDeclAs<NamedDecl>();
1077 AccessSpecifier AS = (AccessSpecifier)Record.readInt();
1078 Lookups.push_back(DeclAccessPair::make(ND, AS));
1079 }
1080 FD->setDefaultedFunctionInfo(FunctionDecl::DefaultedFunctionInfo::Create(
1081 Reader.getContext(), Lookups));
1082 }
1083 }
1084
1085 if (Existing)
1086 mergeRedeclarable(FD, Existing, Redecl);
1087 else if (auto Kind = FD->getTemplatedKind();
1088 Kind == FunctionDecl::TK_FunctionTemplate ||
1089 Kind == FunctionDecl::TK_FunctionTemplateSpecialization) {
1090 // Function Templates have their FunctionTemplateDecls merged instead of
1091 // their FunctionDecls.
1092 auto merge = [this, &Redecl, FD](auto &&F) {
1093 auto *Existing = cast_or_null<FunctionDecl>(Redecl.getKnownMergeTarget());
1094 RedeclarableResult NewRedecl(Existing ? F(Existing) : nullptr,
1095 Redecl.getFirstID(), Redecl.isKeyDecl());
1096 mergeRedeclarableTemplate(F(FD), NewRedecl);
1097 };
1098 if (Kind == FunctionDecl::TK_FunctionTemplate)
1099 merge(
1100 [](FunctionDecl *FD) { return FD->getDescribedFunctionTemplate(); });
1101 else
1102 merge([](FunctionDecl *FD) {
1103 return FD->getTemplateSpecializationInfo()->getTemplate();
1104 });
1105 } else
1106 mergeRedeclarable(FD, Redecl);
1107
1108 // Defer calling `setPure` until merging above has guaranteed we've set
1109 // `DefinitionData` (as this will need to access it).
1110 FD->setPure(Pure);
1111
1112 // Read in the parameters.
1113 unsigned NumParams = Record.readInt();
1114 SmallVector<ParmVarDecl *, 16> Params;
1115 Params.reserve(NumParams);
1116 for (unsigned I = 0; I != NumParams; ++I)
1117 Params.push_back(readDeclAs<ParmVarDecl>());
1118 FD->setParams(Reader.getContext(), Params);
1119}
1120
1121void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
1122 VisitNamedDecl(MD);
1123 if (Record.readInt()) {
1124 // Load the body on-demand. Most clients won't care, because method
1125 // definitions rarely show up in headers.
1126 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1127 HasPendingBody = true;
1128 }
1129 MD->setSelfDecl(readDeclAs<ImplicitParamDecl>());
1130 MD->setCmdDecl(readDeclAs<ImplicitParamDecl>());
1131 MD->setInstanceMethod(Record.readInt());
1132 MD->setVariadic(Record.readInt());
1133 MD->setPropertyAccessor(Record.readInt());
1134 MD->setSynthesizedAccessorStub(Record.readInt());
1135 MD->setDefined(Record.readInt());
1136 MD->setOverriding(Record.readInt());
1137 MD->setHasSkippedBody(Record.readInt());
1138
1139 MD->setIsRedeclaration(Record.readInt());
1140 MD->setHasRedeclaration(Record.readInt());
1141 if (MD->hasRedeclaration())
1142 Reader.getContext().setObjCMethodRedeclaration(MD,
1143 readDeclAs<ObjCMethodDecl>());
1144
1145 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1146 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1147 MD->setRelatedResultType(Record.readInt());
1148 MD->setReturnType(Record.readType());
1149 MD->setReturnTypeSourceInfo(readTypeSourceInfo());
1150 MD->DeclEndLoc = readSourceLocation();
1151 unsigned NumParams = Record.readInt();
1152 SmallVector<ParmVarDecl *, 16> Params;
1153 Params.reserve(NumParams);
1154 for (unsigned I = 0; I != NumParams; ++I)
1155 Params.push_back(readDeclAs<ParmVarDecl>());
1156
1157 MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1158 unsigned NumStoredSelLocs = Record.readInt();
1159 SmallVector<SourceLocation, 16> SelLocs;
1160 SelLocs.reserve(NumStoredSelLocs);
1161 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1162 SelLocs.push_back(readSourceLocation());
1163
1164 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1165}
1166
1167void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1168 VisitTypedefNameDecl(D);
1169
1170 D->Variance = Record.readInt();
1171 D->Index = Record.readInt();
1172 D->VarianceLoc = readSourceLocation();
1173 D->ColonLoc = readSourceLocation();
1174}
1175
1176void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1177 VisitNamedDecl(CD);
1178 CD->setAtStartLoc(readSourceLocation());
1179 CD->setAtEndRange(readSourceRange());
1180}
1181
1182ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1183 unsigned numParams = Record.readInt();
1184 if (numParams == 0)
1185 return nullptr;
1186
1187 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1188 typeParams.reserve(numParams);
1189 for (unsigned i = 0; i != numParams; ++i) {
1190 auto *typeParam = readDeclAs<ObjCTypeParamDecl>();
1191 if (!typeParam)
1192 return nullptr;
1193
1194 typeParams.push_back(typeParam);
1195 }
1196
1197 SourceLocation lAngleLoc = readSourceLocation();
1198 SourceLocation rAngleLoc = readSourceLocation();
1199
1200 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1201 typeParams, rAngleLoc);
1202}
1203
1204void ASTDeclReader::ReadObjCDefinitionData(
1205 struct ObjCInterfaceDecl::DefinitionData &Data) {
1206 // Read the superclass.
1207 Data.SuperClassTInfo = readTypeSourceInfo();
1208
1209 Data.EndLoc = readSourceLocation();
1210 Data.HasDesignatedInitializers = Record.readInt();
1211 Data.ODRHash = Record.readInt();
1212 Data.HasODRHash = true;
1213
1214 // Read the directly referenced protocols and their SourceLocations.
1215 unsigned NumProtocols = Record.readInt();
1216 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1217 Protocols.reserve(NumProtocols);
1218 for (unsigned I = 0; I != NumProtocols; ++I)
1219 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1220 SmallVector<SourceLocation, 16> ProtoLocs;
1221 ProtoLocs.reserve(NumProtocols);
1222 for (unsigned I = 0; I != NumProtocols; ++I)
1223 ProtoLocs.push_back(readSourceLocation());
1224 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1225 Reader.getContext());
1226
1227 // Read the transitive closure of protocols referenced by this class.
1228 NumProtocols = Record.readInt();
1229 Protocols.clear();
1230 Protocols.reserve(NumProtocols);
1231 for (unsigned I = 0; I != NumProtocols; ++I)
1232 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1233 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1234 Reader.getContext());
1235}
1236
1237void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1238 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1239 struct ObjCInterfaceDecl::DefinitionData &DD = D->data();
1240 if (DD.Definition == NewDD.Definition)
1241 return;
1242
1243 Reader.MergedDeclContexts.insert(
1244 std::make_pair(NewDD.Definition, DD.Definition));
1245 Reader.mergeDefinitionVisibility(DD.Definition, NewDD.Definition);
1246
1247 if (D->getODRHash() != NewDD.ODRHash)
1248 Reader.PendingObjCInterfaceOdrMergeFailures[DD.Definition].push_back(
1249 {NewDD.Definition, &NewDD});
1250}
1251
1252void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1253 RedeclarableResult Redecl = VisitRedeclarable(ID);
1254 VisitObjCContainerDecl(ID);
1255 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1256 mergeRedeclarable(ID, Redecl);
1257
1258 ID->TypeParamList = ReadObjCTypeParamList();
1259 if (Record.readInt()) {
1260 // Read the definition.
1261 ID->allocateDefinitionData();
1262
1263 ReadObjCDefinitionData(ID->data());
1264 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1265 if (Canon->Data.getPointer()) {
1266 // If we already have a definition, keep the definition invariant and
1267 // merge the data.
1268 MergeDefinitionData(Canon, std::move(ID->data()));
1269 ID->Data = Canon->Data;
1270 } else {
1271 // Set the definition data of the canonical declaration, so other
1272 // redeclarations will see it.
1273 ID->getCanonicalDecl()->Data = ID->Data;
1274
1275 // We will rebuild this list lazily.
1276 ID->setIvarList(nullptr);
1277 }
1278
1279 // Note that we have deserialized a definition.
1280 Reader.PendingDefinitions.insert(ID);
1281
1282 // Note that we've loaded this Objective-C class.
1283 Reader.ObjCClassesLoaded.push_back(ID);
1284 } else {
1285 ID->Data = ID->getCanonicalDecl()->Data;
1286 }
1287}
1288
1289void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1290 VisitFieldDecl(IVD);
1291 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1292 // This field will be built lazily.
1293 IVD->setNextIvar(nullptr);
1294 bool synth = Record.readInt();
1295 IVD->setSynthesize(synth);
1296
1297 // Check ivar redeclaration.
1298 if (IVD->isInvalidDecl())
1299 return;
1300 // Don't check ObjCInterfaceDecl as interfaces are named and mismatches can be
1301 // detected in VisitObjCInterfaceDecl. Here we are looking for redeclarations
1302 // in extensions.
1303 if (isa<ObjCInterfaceDecl>(IVD->getDeclContext()))
1304 return;
1305 ObjCInterfaceDecl *CanonIntf =
1306 IVD->getContainingInterface()->getCanonicalDecl();
1307 IdentifierInfo *II = IVD->getIdentifier();
1308 ObjCIvarDecl *PrevIvar = CanonIntf->lookupInstanceVariable(II);
1309 if (PrevIvar && PrevIvar != IVD) {
1310 auto *ParentExt = dyn_cast<ObjCCategoryDecl>(IVD->getDeclContext());
1311 auto *PrevParentExt =
1312 dyn_cast<ObjCCategoryDecl>(PrevIvar->getDeclContext());
1313 if (ParentExt && PrevParentExt) {
1314 // Postpone diagnostic as we should merge identical extensions from
1315 // different modules.
1316 Reader
1317 .PendingObjCExtensionIvarRedeclarations[std::make_pair(ParentExt,
1318 PrevParentExt)]
1319 .push_back(std::make_pair(IVD, PrevIvar));
1320 } else if (ParentExt || PrevParentExt) {
1321 // Duplicate ivars in extension + implementation are never compatible.
1322 // Compatibility of implementation + implementation should be handled in
1323 // VisitObjCImplementationDecl.
1324 Reader.Diag(IVD->getLocation(), diag::err_duplicate_ivar_declaration)
1325 << II;
1326 Reader.Diag(PrevIvar->getLocation(), diag::note_previous_definition);
1327 }
1328 }
1329}
1330
1331void ASTDeclReader::ReadObjCDefinitionData(
1332 struct ObjCProtocolDecl::DefinitionData &Data) {
1333 unsigned NumProtoRefs = Record.readInt();
1334 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1335 ProtoRefs.reserve(NumProtoRefs);
1336 for (unsigned I = 0; I != NumProtoRefs; ++I)
1337 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1338 SmallVector<SourceLocation, 16> ProtoLocs;
1339 ProtoLocs.reserve(NumProtoRefs);
1340 for (unsigned I = 0; I != NumProtoRefs; ++I)
1341 ProtoLocs.push_back(readSourceLocation());
1342 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1343 ProtoLocs.data(), Reader.getContext());
1344 Data.ODRHash = Record.readInt();
1345 Data.HasODRHash = true;
1346}
1347
1348void ASTDeclReader::MergeDefinitionData(
1349 ObjCProtocolDecl *D, struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1350 struct ObjCProtocolDecl::DefinitionData &DD = D->data();
1351 if (DD.Definition == NewDD.Definition)
1352 return;
1353
1354 Reader.MergedDeclContexts.insert(
1355 std::make_pair(NewDD.Definition, DD.Definition));
1356 Reader.mergeDefinitionVisibility(DD.Definition, NewDD.Definition);
1357
1358 if (D->getODRHash() != NewDD.ODRHash)
1359 Reader.PendingObjCProtocolOdrMergeFailures[DD.Definition].push_back(
1360 {NewDD.Definition, &NewDD});
1361}
1362
1363void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1364 RedeclarableResult Redecl = VisitRedeclarable(PD);
1365 VisitObjCContainerDecl(PD);
1366 mergeRedeclarable(PD, Redecl);
1367
1368 if (Record.readInt()) {
1369 // Read the definition.
1370 PD->allocateDefinitionData();
1371
1372 ReadObjCDefinitionData(PD->data());
1373
1374 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1375 if (Canon->Data.getPointer()) {
1376 // If we already have a definition, keep the definition invariant and
1377 // merge the data.
1378 MergeDefinitionData(Canon, std::move(PD->data()));
1379 PD->Data = Canon->Data;
1380 } else {
1381 // Set the definition data of the canonical declaration, so other
1382 // redeclarations will see it.
1383 PD->getCanonicalDecl()->Data = PD->Data;
1384 }
1385 // Note that we have deserialized a definition.
1386 Reader.PendingDefinitions.insert(PD);
1387 } else {
1388 PD->Data = PD->getCanonicalDecl()->Data;
1389 }
1390}
1391
1392void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1393 VisitFieldDecl(FD);
1394}
1395
1396void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1397 VisitObjCContainerDecl(CD);
1398 CD->setCategoryNameLoc(readSourceLocation());
1399 CD->setIvarLBraceLoc(readSourceLocation());
1400 CD->setIvarRBraceLoc(readSourceLocation());
1401
1402 // Note that this category has been deserialized. We do this before
1403 // deserializing the interface declaration, so that it will consider this
1404 /// category.
1405 Reader.CategoriesDeserialized.insert(CD);
1406
1407 CD->ClassInterface = readDeclAs<ObjCInterfaceDecl>();
1408 CD->TypeParamList = ReadObjCTypeParamList();
1409 unsigned NumProtoRefs = Record.readInt();
1410 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1411 ProtoRefs.reserve(NumProtoRefs);
1412 for (unsigned I = 0; I != NumProtoRefs; ++I)
1413 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1414 SmallVector<SourceLocation, 16> ProtoLocs;
1415 ProtoLocs.reserve(NumProtoRefs);
1416 for (unsigned I = 0; I != NumProtoRefs; ++I)
1417 ProtoLocs.push_back(readSourceLocation());
1418 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1419 Reader.getContext());
1420
1421 // Protocols in the class extension belong to the class.
1422 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1423 CD->ClassInterface->mergeClassExtensionProtocolList(
1424 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1425 Reader.getContext());
1426}
1427
1428void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1429 VisitNamedDecl(CAD);
1430 CAD->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1431}
1432
1433void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1434 VisitNamedDecl(D);
1435 D->setAtLoc(readSourceLocation());
1436 D->setLParenLoc(readSourceLocation());
1437 QualType T = Record.readType();
1438 TypeSourceInfo *TSI = readTypeSourceInfo();
1439 D->setType(T, TSI);
1440 D->setPropertyAttributes((ObjCPropertyAttribute::Kind)Record.readInt());
1441 D->setPropertyAttributesAsWritten(
1442 (ObjCPropertyAttribute::Kind)Record.readInt());
1443 D->setPropertyImplementation(
1444 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1445 DeclarationName GetterName = Record.readDeclarationName();
1446 SourceLocation GetterLoc = readSourceLocation();
1447 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1448 DeclarationName SetterName = Record.readDeclarationName();
1449 SourceLocation SetterLoc = readSourceLocation();
1450 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1451 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1452 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1453 D->setPropertyIvarDecl(readDeclAs<ObjCIvarDecl>());
1454}
1455
1456void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1457 VisitObjCContainerDecl(D);
1458 D->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1459}
1460
1461void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1462 VisitObjCImplDecl(D);
1463 D->CategoryNameLoc = readSourceLocation();
1464}
1465
1466void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1467 VisitObjCImplDecl(D);
1468 D->setSuperClass(readDeclAs<ObjCInterfaceDecl>());
1469 D->SuperLoc = readSourceLocation();
1470 D->setIvarLBraceLoc(readSourceLocation());
1471 D->setIvarRBraceLoc(readSourceLocation());
1472 D->setHasNonZeroConstructors(Record.readInt());
1473 D->setHasDestructors(Record.readInt());
1474 D->NumIvarInitializers = Record.readInt();
1475 if (D->NumIvarInitializers)
1476 D->IvarInitializers = ReadGlobalOffset();
1477}
1478
1479void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1480 VisitDecl(D);
1481 D->setAtLoc(readSourceLocation());
1482 D->setPropertyDecl(readDeclAs<ObjCPropertyDecl>());
1483 D->PropertyIvarDecl = readDeclAs<ObjCIvarDecl>();
1484 D->IvarLoc = readSourceLocation();
1485 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1486 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1487 D->setGetterCXXConstructor(Record.readExpr());
1488 D->setSetterCXXAssignment(Record.readExpr());
1489}
1490
1491void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1492 VisitDeclaratorDecl(FD);
1493 FD->Mutable = Record.readInt();
1494
1495 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1496 FD->InitStorage.setInt(ISK);
1497 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1498 ? Record.readType().getAsOpaquePtr()
1499 : Record.readExpr());
1500 }
1501
1502 if (auto *BW = Record.readExpr())
1503 FD->setBitWidth(BW);
1504
1505 if (!FD->getDeclName()) {
1506 if (auto *Tmpl = readDeclAs<FieldDecl>())
1507 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1508 }
1509 mergeMergeable(FD);
1510}
1511
1512void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1513 VisitDeclaratorDecl(PD);
1514 PD->GetterId = Record.readIdentifier();
1515 PD->SetterId = Record.readIdentifier();
1516}
1517
1518void ASTDeclReader::VisitMSGuidDecl(MSGuidDecl *D) {
1519 VisitValueDecl(D);
1520 D->PartVal.Part1 = Record.readInt();
1521 D->PartVal.Part2 = Record.readInt();
1522 D->PartVal.Part3 = Record.readInt();
1523 for (auto &C : D->PartVal.Part4And5)
1524 C = Record.readInt();
1525
1526 // Add this GUID to the AST context's lookup structure, and merge if needed.
1527 if (MSGuidDecl *Existing = Reader.getContext().MSGuidDecls.GetOrInsertNode(D))
1528 Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());
1529}
1530
1531void ASTDeclReader::VisitUnnamedGlobalConstantDecl(
1532 UnnamedGlobalConstantDecl *D) {
1533 VisitValueDecl(D);
1534 D->Value = Record.readAPValue();
1535
1536 // Add this to the AST context's lookup structure, and merge if needed.
1537 if (UnnamedGlobalConstantDecl *Existing =
1538 Reader.getContext().UnnamedGlobalConstantDecls.GetOrInsertNode(D))
1539 Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());
1540}
1541
1542void ASTDeclReader::VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D) {
1543 VisitValueDecl(D);
1544 D->Value = Record.readAPValue();
1545
1546 // Add this template parameter object to the AST context's lookup structure,
1547 // and merge if needed.
1548 if (TemplateParamObjectDecl *Existing =
1549 Reader.getContext().TemplateParamObjectDecls.GetOrInsertNode(D))
1550 Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());
1551}
1552
1553void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1554 VisitValueDecl(FD);
1555
1556 FD->ChainingSize = Record.readInt();
1557 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 1557, __extension__
__PRETTY_FUNCTION__))
;
1558 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1559
1560 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1561 FD->Chaining[I] = readDeclAs<NamedDecl>();
1562
1563 mergeMergeable(FD);
1564}
1565
1566ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1567 RedeclarableResult Redecl = VisitRedeclarable(VD);
1568 VisitDeclaratorDecl(VD);
1569
1570 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1571 VD->VarDeclBits.TSCSpec = Record.readInt();
1572 VD->VarDeclBits.InitStyle = Record.readInt();
1573 VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1574 if (!isa<ParmVarDecl>(VD)) {
1575 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1576 Record.readInt();
1577 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1578 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1579 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1580 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1581 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1582 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1583 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1584 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1585 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1586 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1587 VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1588 }
1589 auto VarLinkage = Linkage(Record.readInt());
1590 VD->setCachedLinkage(VarLinkage);
1591
1592 // Reconstruct the one piece of the IdentifierNamespace that we need.
1593 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1594 VD->getLexicalDeclContext()->isFunctionOrMethod())
1595 VD->setLocalExternDecl();
1596
1597 if (uint64_t Val = Record.readInt()) {
1598 VD->setInit(Record.readExpr());
1599 if (Val != 1) {
1600 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1601 Eval->HasConstantInitialization = (Val & 2) != 0;
1602 Eval->HasConstantDestruction = (Val & 4) != 0;
1603 }
1604 }
1605
1606 if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1607 Expr *CopyExpr = Record.readExpr();
1608 if (CopyExpr)
1609 Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1610 }
1611
1612 if (VD->getStorageDuration() == SD_Static && Record.readInt()) {
1613 Reader.DefinitionSource[VD] =
1614 Loc.F->Kind == ModuleKind::MK_MainFile ||
1615 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1616 }
1617
1618 enum VarKind {
1619 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1620 };
1621 switch ((VarKind)Record.readInt()) {
1622 case VarNotTemplate:
1623 // Only true variables (not parameters or implicit parameters) can be
1624 // merged; the other kinds are not really redeclarable at all.
1625 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1626 !isa<VarTemplateSpecializationDecl>(VD))
1627 mergeRedeclarable(VD, Redecl);
1628 break;
1629 case VarTemplate:
1630 // Merged when we merge the template.
1631 VD->setDescribedVarTemplate(readDeclAs<VarTemplateDecl>());
1632 break;
1633 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1634 auto *Tmpl = readDeclAs<VarDecl>();
1635 auto TSK = (TemplateSpecializationKind)Record.readInt();
1636 SourceLocation POI = readSourceLocation();
1637 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1638 mergeRedeclarable(VD, Redecl);
1639 break;
1640 }
1641 }
1642
1643 return Redecl;
1644}
1645
1646void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1647 VisitVarDecl(PD);
1648}
1649
1650void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1651 VisitVarDecl(PD);
1652 unsigned isObjCMethodParam = Record.readInt();
1653 unsigned scopeDepth = Record.readInt();
1654 unsigned scopeIndex = Record.readInt();
1655 unsigned declQualifier = Record.readInt();
1656 if (isObjCMethodParam) {
1657 assert(scopeDepth == 0)(static_cast <bool> (scopeDepth == 0) ? void (0) : __assert_fail
("scopeDepth == 0", "clang/lib/Serialization/ASTReaderDecl.cpp"
, 1657, __extension__ __PRETTY_FUNCTION__))
;
1658 PD->setObjCMethodScopeInfo(scopeIndex);
1659 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1660 } else {
1661 PD->setScopeInfo(scopeDepth, scopeIndex);
1662 }
1663 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1664 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1665 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1666 PD->setUninstantiatedDefaultArg(Record.readExpr());
1667
1668 // FIXME: If this is a redeclaration of a function from another module, handle
1669 // inheritance of default arguments.
1670}
1671
1672void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1673 VisitVarDecl(DD);
1674 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1675 for (unsigned I = 0; I != DD->NumBindings; ++I) {
1676 BDs[I] = readDeclAs<BindingDecl>();
1677 BDs[I]->setDecomposedDecl(DD);
1678 }
1679}
1680
1681void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1682 VisitValueDecl(BD);
1683 BD->Binding = Record.readExpr();
1684}
1685
1686void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1687 VisitDecl(AD);
1688 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1689 AD->setRParenLoc(readSourceLocation());
1690}
1691
1692void ASTDeclReader::VisitTopLevelStmtDecl(TopLevelStmtDecl *D) {
1693 VisitDecl(D);
1694 D->Statement = Record.readStmt();
1695}
1696
1697void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1698 VisitDecl(BD);
1699 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1700 BD->setSignatureAsWritten(readTypeSourceInfo());
1701 unsigned NumParams = Record.readInt();
1702 SmallVector<ParmVarDecl *, 16> Params;
1703 Params.reserve(NumParams);
1704 for (unsigned I = 0; I != NumParams; ++I)
1705 Params.push_back(readDeclAs<ParmVarDecl>());
1706 BD->setParams(Params);
1707
1708 BD->setIsVariadic(Record.readInt());
1709 BD->setBlockMissingReturnType(Record.readInt());
1710 BD->setIsConversionFromLambda(Record.readInt());
1711 BD->setDoesNotEscape(Record.readInt());
1712 BD->setCanAvoidCopyToHeap(Record.readInt());
1713
1714 bool capturesCXXThis = Record.readInt();
1715 unsigned numCaptures = Record.readInt();
1716 SmallVector<BlockDecl::Capture, 16> captures;
1717 captures.reserve(numCaptures);
1718 for (unsigned i = 0; i != numCaptures; ++i) {
1719 auto *decl = readDeclAs<VarDecl>();
1720 unsigned flags = Record.readInt();
1721 bool byRef = (flags & 1);
1722 bool nested = (flags & 2);
1723 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1724
1725 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1726 }
1727 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1728}
1729
1730void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1731 VisitDecl(CD);
1732 unsigned ContextParamPos = Record.readInt();
1733 CD->setNothrow(Record.readInt() != 0);
1734 // Body is set by VisitCapturedStmt.
1735 for (unsigned I = 0; I < CD->NumParams; ++I) {
1736 if (I != ContextParamPos)
1737 CD->setParam(I, readDeclAs<ImplicitParamDecl>());
1738 else
1739 CD->setContextParam(I, readDeclAs<ImplicitParamDecl>());
1740 }
1741}
1742
1743void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1744 VisitDecl(D);
1745 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1746 D->setExternLoc(readSourceLocation());
1747 D->setRBraceLoc(readSourceLocation());
1748}
1749
1750void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1751 VisitDecl(D);
1752 D->RBraceLoc = readSourceLocation();
1753}
1754
1755void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1756 VisitNamedDecl(D);
1757 D->setLocStart(readSourceLocation());
1758}
1759
1760void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1761 RedeclarableResult Redecl = VisitRedeclarable(D);
1762 VisitNamedDecl(D);
1763 D->setInline(Record.readInt());
1764 D->setNested(Record.readInt());
1765 D->LocStart = readSourceLocation();
1766 D->RBraceLoc = readSourceLocation();
1767
1768 // Defer loading the anonymous namespace until we've finished merging
1769 // this namespace; loading it might load a later declaration of the
1770 // same namespace, and we have an invariant that older declarations
1771 // get merged before newer ones try to merge.
1772 GlobalDeclID AnonNamespace = 0;
1773 if (Redecl.getFirstID() == ThisDeclID) {
1774 AnonNamespace = readDeclID();
1775 } else {
1776 // Link this namespace back to the first declaration, which has already
1777 // been deserialized.
1778 D->AnonOrFirstNamespaceAndFlags.setPointer(D->getFirstDecl());
1779 }
1780
1781 mergeRedeclarable(D, Redecl);
1782
1783 if (AnonNamespace) {
1784 // Each module has its own anonymous namespace, which is disjoint from
1785 // any other module's anonymous namespaces, so don't attach the anonymous
1786 // namespace at all.
1787 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1788 if (!Record.isModule())
1789 D->setAnonymousNamespace(Anon);
1790 }
1791}
1792
1793void ASTDeclReader::VisitHLSLBufferDecl(HLSLBufferDecl *D) {
1794 VisitNamedDecl(D);
1795 VisitDeclContext(D);
1796 D->IsCBuffer = Record.readBool();
1797 D->KwLoc = readSourceLocation();
1798 D->LBraceLoc = readSourceLocation();
1799 D->RBraceLoc = readSourceLocation();
1800}
1801
1802void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1803 RedeclarableResult Redecl = VisitRedeclarable(D);
1804 VisitNamedDecl(D);
1805 D->NamespaceLoc = readSourceLocation();
1806 D->IdentLoc = readSourceLocation();
1807 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1808 D->Namespace = readDeclAs<NamedDecl>();
1809 mergeRedeclarable(D, Redecl);
1810}
1811
1812void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1813 VisitNamedDecl(D);
1814 D->setUsingLoc(readSourceLocation());
1815 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1816 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1817 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1818 D->setTypename(Record.readInt());
1819 if (auto *Pattern = readDeclAs<NamedDecl>())
1820 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1821 mergeMergeable(D);
1822}
1823
1824void ASTDeclReader::VisitUsingEnumDecl(UsingEnumDecl *D) {
1825 VisitNamedDecl(D);
1826 D->setUsingLoc(readSourceLocation());
1827 D->setEnumLoc(readSourceLocation());
1828 D->setEnumType(Record.readTypeSourceInfo());
1829 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1830 if (auto *Pattern = readDeclAs<UsingEnumDecl>())
1831 Reader.getContext().setInstantiatedFromUsingEnumDecl(D, Pattern);
1832 mergeMergeable(D);
1833}
1834
1835void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1836 VisitNamedDecl(D);
1837 D->InstantiatedFrom = readDeclAs<NamedDecl>();
1838 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1839 for (unsigned I = 0; I != D->NumExpansions; ++I)
1840 Expansions[I] = readDeclAs<NamedDecl>();
1841 mergeMergeable(D);
1842}
1843
1844void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1845 RedeclarableResult Redecl = VisitRedeclarable(D);
1846 VisitNamedDecl(D);
1847 D->Underlying = readDeclAs<NamedDecl>();
1848 D->IdentifierNamespace = Record.readInt();
1849 D->UsingOrNextShadow = readDeclAs<NamedDecl>();
1850 auto *Pattern = readDeclAs<UsingShadowDecl>();
1851 if (Pattern)
1852 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1853 mergeRedeclarable(D, Redecl);
1854}
1855
1856void ASTDeclReader::VisitConstructorUsingShadowDecl(
1857 ConstructorUsingShadowDecl *D) {
1858 VisitUsingShadowDecl(D);
1859 D->NominatedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1860 D->ConstructedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1861 D->IsVirtual = Record.readInt();
1862}
1863
1864void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1865 VisitNamedDecl(D);
1866 D->UsingLoc = readSourceLocation();
1867 D->NamespaceLoc = readSourceLocation();
1868 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1869 D->NominatedNamespace = readDeclAs<NamedDecl>();
1870 D->CommonAncestor = readDeclAs<DeclContext>();
1871}
1872
1873void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1874 VisitValueDecl(D);
1875 D->setUsingLoc(readSourceLocation());
1876 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1877 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1878 D->EllipsisLoc = readSourceLocation();
1879 mergeMergeable(D);
1880}
1881
1882void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1883 UnresolvedUsingTypenameDecl *D) {
1884 VisitTypeDecl(D);
1885 D->TypenameLocation = readSourceLocation();
1886 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1887 D->EllipsisLoc = readSourceLocation();
1888 mergeMergeable(D);
1889}
1890
1891void ASTDeclReader::VisitUnresolvedUsingIfExistsDecl(
1892 UnresolvedUsingIfExistsDecl *D) {
1893 VisitNamedDecl(D);
1894}
1895
1896void ASTDeclReader::ReadCXXDefinitionData(
1897 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1898 #define FIELD(Name, Width, Merge) \
1899 Data.Name = Record.readInt();
1900 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1901
1902 // Note: the caller has deserialized the IsLambda bit already.
1903 Data.ODRHash = Record.readInt();
1904 Data.HasODRHash = true;
1905
1906 if (Record.readInt()) {
1907 Reader.DefinitionSource[D] =
1908 Loc.F->Kind == ModuleKind::MK_MainFile ||
1909 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1910 }
1911
1912 Data.NumBases = Record.readInt();
1913 if (Data.NumBases)
1914 Data.Bases = ReadGlobalOffset();
1915 Data.NumVBases = Record.readInt();
1916 if (Data.NumVBases)
1917 Data.VBases = ReadGlobalOffset();
1918
1919 Record.readUnresolvedSet(Data.Conversions);
1920 Data.ComputedVisibleConversions = Record.readInt();
1921 if (Data.ComputedVisibleConversions)
1922 Record.readUnresolvedSet(Data.VisibleConversions);
1923 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!\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 1923, __extension__
__PRETTY_FUNCTION__))
;
1924 Data.FirstFriend = readDeclID();
1925
1926 if (Data.IsLambda) {
1927 using Capture = LambdaCapture;
1928
1929 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1930 Lambda.DependencyKind = Record.readInt();
1931 Lambda.IsGenericLambda = Record.readInt();
1932 Lambda.CaptureDefault = Record.readInt();
1933 Lambda.NumCaptures = Record.readInt();
1934 Lambda.NumExplicitCaptures = Record.readInt();
1935 Lambda.HasKnownInternalLinkage = Record.readInt();
1936 Lambda.ManglingNumber = Record.readInt();
1937 D->setDeviceLambdaManglingNumber(Record.readInt());
1938 Lambda.ContextDecl = readDeclID();
1939 Capture *ToCapture = nullptr;
1940 if (Lambda.NumCaptures) {
1941 ToCapture = (Capture *)Reader.getContext().Allocate(sizeof(Capture) *
1942 Lambda.NumCaptures);
1943 Lambda.AddCaptureList(Reader.getContext(), ToCapture);
1944 }
1945 Lambda.MethodTyInfo = readTypeSourceInfo();
1946 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1947 SourceLocation Loc = readSourceLocation();
1948 bool IsImplicit = Record.readInt();
1949 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1950 switch (Kind) {
1951 case LCK_StarThis:
1952 case LCK_This:
1953 case LCK_VLAType:
1954 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1955 break;
1956 case LCK_ByCopy:
1957 case LCK_ByRef:
1958 auto *Var = readDeclAs<VarDecl>();
1959 SourceLocation EllipsisLoc = readSourceLocation();
1960 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1961 break;
1962 }
1963 }
1964 }
1965}
1966
1967void ASTDeclReader::MergeDefinitionData(
1968 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1969 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 1970, __extension__
__PRETTY_FUNCTION__))
1970 "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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 1970, __extension__
__PRETTY_FUNCTION__))
;
1971 auto &DD = *D->DefinitionData;
1972
1973 if (DD.Definition != MergeDD.Definition) {
1974 // Track that we merged the definitions.
1975 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1976 DD.Definition));
1977 Reader.PendingDefinitions.erase(MergeDD.Definition);
1978 MergeDD.Definition->setCompleteDefinition(false);
1979 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1980 assert(!Reader.Lookups.contains(MergeDD.Definition) &&(static_cast <bool> (!Reader.Lookups.contains(MergeDD.Definition
) && "already loaded pending lookups for merged definition"
) ? void (0) : __assert_fail ("!Reader.Lookups.contains(MergeDD.Definition) && \"already loaded pending lookups for merged definition\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 1981, __extension__
__PRETTY_FUNCTION__))
1981 "already loaded pending lookups for merged definition")(static_cast <bool> (!Reader.Lookups.contains(MergeDD.Definition
) && "already loaded pending lookups for merged definition"
) ? void (0) : __assert_fail ("!Reader.Lookups.contains(MergeDD.Definition) && \"already loaded pending lookups for merged definition\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 1981, __extension__
__PRETTY_FUNCTION__))
;
1982 }
1983
1984 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1985 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1986 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1987 // We faked up this definition data because we found a class for which we'd
1988 // not yet loaded the definition. Replace it with the real thing now.
1989 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?\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 1989, __extension__
__PRETTY_FUNCTION__))
;
1990 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1991
1992 // Don't change which declaration is the definition; that is required
1993 // to be invariant once we select it.
1994 auto *Def = DD.Definition;
1995 DD = std::move(MergeDD);
1996 DD.Definition = Def;
1997 return;
1998 }
1999
2000 bool DetectedOdrViolation = false;
2001
2002 #define FIELD(Name, Width, Merge) Merge(Name)
2003 #define MERGE_OR(Field) DD.Field |= MergeDD.Field;
2004 #define NO_MERGE(Field) \
2005 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
2006 MERGE_OR(Field)
2007 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
2008 NO_MERGE(IsLambda)
2009 #undef NO_MERGE
2010 #undef MERGE_OR
2011
2012 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
2013 DetectedOdrViolation = true;
2014 // FIXME: Issue a diagnostic if the base classes don't match when we come
2015 // to lazily load them.
2016
2017 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
2018 // match when we come to lazily load them.
2019 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
2020 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
2021 DD.ComputedVisibleConversions = true;
2022 }
2023
2024 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
2025 // lazily load it.
2026
2027 if (DD.IsLambda) {
2028 auto &Lambda1 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(DD);
2029 auto &Lambda2 = static_cast<CXXRecordDecl::LambdaDefinitionData &>(MergeDD);
2030 DetectedOdrViolation |= Lambda1.DependencyKind != Lambda2.DependencyKind;
2031 DetectedOdrViolation |= Lambda1.IsGenericLambda != Lambda2.IsGenericLambda;
2032 DetectedOdrViolation |= Lambda1.CaptureDefault != Lambda2.CaptureDefault;
2033 DetectedOdrViolation |= Lambda1.NumCaptures != Lambda2.NumCaptures;
2034 DetectedOdrViolation |=
2035 Lambda1.NumExplicitCaptures != Lambda2.NumExplicitCaptures;
2036 DetectedOdrViolation |=
2037 Lambda1.HasKnownInternalLinkage != Lambda2.HasKnownInternalLinkage;
2038 DetectedOdrViolation |= Lambda1.ManglingNumber != Lambda2.ManglingNumber;
2039
2040 if (Lambda1.NumCaptures && Lambda1.NumCaptures == Lambda2.NumCaptures) {
2041 for (unsigned I = 0, N = Lambda1.NumCaptures; I != N; ++I) {
2042 LambdaCapture &Cap1 = Lambda1.Captures.front()[I];
2043 LambdaCapture &Cap2 = Lambda2.Captures.front()[I];
2044 DetectedOdrViolation |= Cap1.getCaptureKind() != Cap2.getCaptureKind();
2045 }
2046 Lambda1.AddCaptureList(Reader.getContext(), Lambda2.Captures.front());
2047 }
2048 }
2049
2050 if (D->getODRHash() != MergeDD.ODRHash) {
2051 DetectedOdrViolation = true;
2052 }
2053
2054 if (DetectedOdrViolation)
2055 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
2056 {MergeDD.Definition, &MergeDD});
2057}
2058
2059void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
2060 struct CXXRecordDecl::DefinitionData *DD;
2061 ASTContext &C = Reader.getContext();
2062
2063 // Determine whether this is a lambda closure type, so that we can
2064 // allocate the appropriate DefinitionData structure.
2065 bool IsLambda = Record.readInt();
2066 if (IsLambda)
2067 DD = new (C) CXXRecordDecl::LambdaDefinitionData(
2068 D, nullptr, CXXRecordDecl::LDK_Unknown, false, LCD_None);
2069 else
2070 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
2071
2072 CXXRecordDecl *Canon = D->getCanonicalDecl();
2073 // Set decl definition data before reading it, so that during deserialization
2074 // when we read CXXRecordDecl, it already has definition data and we don't
2075 // set fake one.
2076 if (!Canon->DefinitionData)
2077 Canon->DefinitionData = DD;
2078 D->DefinitionData = Canon->DefinitionData;
2079 ReadCXXDefinitionData(*DD, D);
2080
2081 // We might already have a different definition for this record. This can
2082 // happen either because we're reading an update record, or because we've
2083 // already done some merging. Either way, just merge into it.
2084 if (Canon->DefinitionData != DD) {
2085 MergeDefinitionData(Canon, std::move(*DD));
2086 return;
2087 }
2088
2089 // Mark this declaration as being a definition.
2090 D->setCompleteDefinition(true);
2091
2092 // If this is not the first declaration or is an update record, we can have
2093 // other redeclarations already. Make a note that we need to propagate the
2094 // DefinitionData pointer onto them.
2095 if (Update || Canon != D)
2096 Reader.PendingDefinitions.insert(D);
2097}
2098
2099ASTDeclReader::RedeclarableResult
2100ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
2101 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
2102
2103 ASTContext &C = Reader.getContext();
2104
2105 enum CXXRecKind {
2106 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
2107 };
2108 switch ((CXXRecKind)Record.readInt()) {
2109 case CXXRecNotTemplate:
2110 // Merged when we merge the folding set entry in the primary template.
2111 if (!isa<ClassTemplateSpecializationDecl>(D))
2112 mergeRedeclarable(D, Redecl);
2113 break;
2114 case CXXRecTemplate: {
2115 // Merged when we merge the template.
2116 auto *Template = readDeclAs<ClassTemplateDecl>();
2117 D->TemplateOrInstantiation = Template;
2118 if (!Template->getTemplatedDecl()) {
2119 // We've not actually loaded the ClassTemplateDecl yet, because we're
2120 // currently being loaded as its pattern. Rely on it to set up our
2121 // TypeForDecl (see VisitClassTemplateDecl).
2122 //
2123 // Beware: we do not yet know our canonical declaration, and may still
2124 // get merged once the surrounding class template has got off the ground.
2125 DeferredTypeID = 0;
2126 }
2127 break;
2128 }
2129 case CXXRecMemberSpecialization: {
2130 auto *RD = readDeclAs<CXXRecordDecl>();
2131 auto TSK = (TemplateSpecializationKind)Record.readInt();
2132 SourceLocation POI = readSourceLocation();
2133 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
2134 MSI->setPointOfInstantiation(POI);
2135 D->TemplateOrInstantiation = MSI;
2136 mergeRedeclarable(D, Redecl);
2137 break;
2138 }
2139 }
2140
2141 bool WasDefinition = Record.readInt();
2142 if (WasDefinition)
2143 ReadCXXRecordDefinition(D, /*Update*/false);
2144 else
2145 // Propagate DefinitionData pointer from the canonical declaration.
2146 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
2147
2148 // Lazily load the key function to avoid deserializing every method so we can
2149 // compute it.
2150 if (WasDefinition) {
2151 DeclID KeyFn = readDeclID();
2152 if (KeyFn && D->isCompleteDefinition())
2153 // FIXME: This is wrong for the ARM ABI, where some other module may have
2154 // made this function no longer be a key function. We need an update
2155 // record or similar for that case.
2156 C.KeyFunctions[D] = KeyFn;
2157 }
2158
2159 return Redecl;
2160}
2161
2162void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
2163 D->setExplicitSpecifier(Record.readExplicitSpec());
2164 D->Ctor = readDeclAs<CXXConstructorDecl>();
2165 VisitFunctionDecl(D);
2166 D->setIsCopyDeductionCandidate(Record.readInt());
2167}
2168
2169void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
2170 VisitFunctionDecl(D);
2171
2172 unsigned NumOverridenMethods = Record.readInt();
2173 if (D->isCanonicalDecl()) {
2174 while (NumOverridenMethods--) {
2175 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
2176 // MD may be initializing.
2177 if (auto *MD = readDeclAs<CXXMethodDecl>())
2178 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
2179 }
2180 } else {
2181 // We don't care about which declarations this used to override; we get
2182 // the relevant information from the canonical declaration.
2183 Record.skipInts(NumOverridenMethods);
2184 }
2185}
2186
2187void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
2188 // We need the inherited constructor information to merge the declaration,
2189 // so we have to read it before we call VisitCXXMethodDecl.
2190 D->setExplicitSpecifier(Record.readExplicitSpec());
2191 if (D->isInheritingConstructor()) {
2192 auto *Shadow = readDeclAs<ConstructorUsingShadowDecl>();
2193 auto *Ctor = readDeclAs<CXXConstructorDecl>();
2194 *D->getTrailingObjects<InheritedConstructor>() =
2195 InheritedConstructor(Shadow, Ctor);
2196 }
2197
2198 VisitCXXMethodDecl(D);
2199}
2200
2201void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
2202 VisitCXXMethodDecl(D);
2203
2204 if (auto *OperatorDelete = readDeclAs<FunctionDecl>()) {
2205 CXXDestructorDecl *Canon = D->getCanonicalDecl();
2206 auto *ThisArg = Record.readExpr();
2207 // FIXME: Check consistency if we have an old and new operator delete.
2208 if (!Canon->OperatorDelete) {
2209 Canon->OperatorDelete = OperatorDelete;
2210 Canon->OperatorDeleteThisArg = ThisArg;
2211 }
2212 }
2213}
2214
2215void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
2216 D->setExplicitSpecifier(Record.readExplicitSpec());
2217 VisitCXXMethodDecl(D);
2218}
2219
2220void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
2221 VisitDecl(D);
2222 D->ImportedModule = readModule();
2223 D->setImportComplete(Record.readInt());
2224 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2225 for (unsigned I = 0, N = Record.back(); I != N; ++I)
2226 StoredLocs[I] = readSourceLocation();
2227 Record.skipInts(1); // The number of stored source locations.
2228}
2229
2230void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
2231 VisitDecl(D);
2232 D->setColonLoc(readSourceLocation());
2233}
2234
2235void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
2236 VisitDecl(D);
2237 if (Record.readInt()) // hasFriendDecl
2238 D->Friend = readDeclAs<NamedDecl>();
2239 else
2240 D->Friend = readTypeSourceInfo();
2241 for (unsigned i = 0; i != D->NumTPLists; ++i)
2242 D->getTrailingObjects<TemplateParameterList *>()[i] =
2243 Record.readTemplateParameterList();
2244 D->NextFriend = readDeclID();
2245 D->UnsupportedFriend = (Record.readInt() != 0);
2246 D->FriendLoc = readSourceLocation();
2247}
2248
2249void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
2250 VisitDecl(D);
2251 unsigned NumParams = Record.readInt();
2252 D->NumParams = NumParams;
2253 D->Params = new (Reader.getContext()) TemplateParameterList *[NumParams];
2254 for (unsigned i = 0; i != NumParams; ++i)
2255 D->Params[i] = Record.readTemplateParameterList();
2256 if (Record.readInt()) // HasFriendDecl
2257 D->Friend = readDeclAs<NamedDecl>();
2258 else
2259 D->Friend = readTypeSourceInfo();
2260 D->FriendLoc = readSourceLocation();
2261}
2262
2263void ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2264 VisitNamedDecl(D);
2265
2266 assert(!D->TemplateParams && "TemplateParams already set!")(static_cast <bool> (!D->TemplateParams && "TemplateParams already set!"
) ? void (0) : __assert_fail ("!D->TemplateParams && \"TemplateParams already set!\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 2266, __extension__
__PRETTY_FUNCTION__))
;
2267 D->TemplateParams = Record.readTemplateParameterList();
2268 D->init(readDeclAs<NamedDecl>());
2269}
2270
2271void ASTDeclReader::VisitConceptDecl(ConceptDecl *D) {
2272 VisitTemplateDecl(D);
2273 D->ConstraintExpr = Record.readExpr();
2274 mergeMergeable(D);
2275}
2276
2277void ASTDeclReader::VisitImplicitConceptSpecializationDecl(
2278 ImplicitConceptSpecializationDecl *D) {
2279 // The size of the template list was read during creation of the Decl, so we
2280 // don't have to re-read it here.
2281 VisitDecl(D);
2282 llvm::SmallVector<TemplateArgument, 4> Args;
2283 for (unsigned I = 0; I < D->NumTemplateArgs; ++I)
2284 Args.push_back(Record.readTemplateArgument(/*Canonicalize=*/true));
2285 D->setTemplateArguments(Args);
2286}
2287
2288void ASTDeclReader::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) {
2289}
2290
2291ASTDeclReader::RedeclarableResult
2292ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2293 RedeclarableResult Redecl = VisitRedeclarable(D);
2294
2295 // Make sure we've allocated the Common pointer first. We do this before
2296 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2297 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2298 if (!CanonD->Common) {
2299 CanonD->Common = CanonD->newCommon(Reader.getContext());
2300 Reader.PendingDefinitions.insert(CanonD);
2301 }
2302 D->Common = CanonD->Common;
2303
2304 // If this is the first declaration of the template, fill in the information
2305 // for the 'common' pointer.
2306 if (ThisDeclID == Redecl.getFirstID()) {
2307 if (auto *RTD = readDeclAs<RedeclarableTemplateDecl>()) {
2308 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 2309, __extension__
__PRETTY_FUNCTION__))
2309 "InstantiatedFromMemberTemplate kind mismatch")(static_cast <bool> (RTD->getKind() == D->getKind
() && "InstantiatedFromMemberTemplate kind mismatch")
? void (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 2309, __extension__
__PRETTY_FUNCTION__))
;
2310 D->setInstantiatedFromMemberTemplate(RTD);
2311 if (Record.readInt())
2312 D->setMemberSpecialization();
2313 }
2314 }
2315
2316 VisitTemplateDecl(D);
2317 D->IdentifierNamespace = Record.readInt();
2318
2319 return Redecl;
2320}
2321
2322void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2323 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2324 mergeRedeclarableTemplate(D, Redecl);
2325
2326 if (ThisDeclID == Redecl.getFirstID()) {
2327 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2328 // the specializations.
2329 SmallVector<serialization::DeclID, 32> SpecIDs;
2330 readDeclIDList(SpecIDs);
2331 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2332 }
2333
2334 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2335 // We were loaded before our templated declaration was. We've not set up
2336 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2337 // it now.
2338 Reader.getContext().getInjectedClassNameType(
2339 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2340 }
2341}
2342
2343void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2344 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 2344)
;
2345}
2346
2347/// TODO: Unify with ClassTemplateDecl version?
2348/// May require unifying ClassTemplateDecl and
2349/// VarTemplateDecl beyond TemplateDecl...
2350void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2351 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2352 mergeRedeclarableTemplate(D, Redecl);
2353
2354 if (ThisDeclID == Redecl.getFirstID()) {
2355 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2356 // the specializations.
2357 SmallVector<serialization::DeclID, 32> SpecIDs;
2358 readDeclIDList(SpecIDs);
2359 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2360 }
2361}
2362
2363ASTDeclReader::RedeclarableResult
2364ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2365 ClassTemplateSpecializationDecl *D) {
2366 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2367
2368 ASTContext &C = Reader.getContext();
2369 if (Decl *InstD = readDecl()) {
2370 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2371 D->SpecializedTemplate = CTD;
2372 } else {
2373 SmallVector<TemplateArgument, 8> TemplArgs;
2374 Record.readTemplateArgumentList(TemplArgs);
2375 TemplateArgumentList *ArgList
2376 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2377 auto *PS =
2378 new (C) ClassTemplateSpecializationDecl::
2379 SpecializedPartialSpecialization();
2380 PS->PartialSpecialization
2381 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2382 PS->TemplateArgs = ArgList;
2383 D->SpecializedTemplate = PS;
2384 }
2385 }
2386
2387 SmallVector<TemplateArgument, 8> TemplArgs;
2388 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2389 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2390 D->PointOfInstantiation = readSourceLocation();
2391 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2392
2393 bool writtenAsCanonicalDecl = Record.readInt();
2394 if (writtenAsCanonicalDecl) {
2395 auto *CanonPattern = readDeclAs<ClassTemplateDecl>();
2396 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2397 // Set this as, or find, the canonical declaration for this specialization
2398 ClassTemplateSpecializationDecl *CanonSpec;
2399 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2400 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2401 .GetOrInsertNode(Partial);
2402 } else {
2403 CanonSpec =
2404 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2405 }
2406 // If there was already a canonical specialization, merge into it.
2407 if (CanonSpec != D) {
2408 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2409
2410 // This declaration might be a definition. Merge with any existing
2411 // definition.
2412 if (auto *DDD = D->DefinitionData) {
2413 if (CanonSpec->DefinitionData)
2414 MergeDefinitionData(CanonSpec, std::move(*DDD));
2415 else
2416 CanonSpec->DefinitionData = D->DefinitionData;
2417 }
2418 D->DefinitionData = CanonSpec->DefinitionData;
2419 }
2420 }
2421 }
2422
2423 // Explicit info.
2424 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2425 auto *ExplicitInfo =
2426 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2427 ExplicitInfo->TypeAsWritten = TyInfo;
2428 ExplicitInfo->ExternLoc = readSourceLocation();
2429 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2430 D->ExplicitInfo = ExplicitInfo;
2431 }
2432
2433 return Redecl;
2434}
2435
2436void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2437 ClassTemplatePartialSpecializationDecl *D) {
2438 // We need to read the template params first because redeclarable is going to
2439 // need them for profiling
2440 TemplateParameterList *Params = Record.readTemplateParameterList();
2441 D->TemplateParams = Params;
2442 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2443
2444 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2445
2446 // These are read/set from/to the first declaration.
2447 if (ThisDeclID == Redecl.getFirstID()) {
2448 D->InstantiatedFromMember.setPointer(
2449 readDeclAs<ClassTemplatePartialSpecializationDecl>());
2450 D->InstantiatedFromMember.setInt(Record.readInt());
2451 }
2452}
2453
2454void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2455 ClassScopeFunctionSpecializationDecl *D) {
2456 VisitDecl(D);
2457 D->Specialization = readDeclAs<CXXMethodDecl>();
2458 if (Record.readInt())
2459 D->TemplateArgs = Record.readASTTemplateArgumentListInfo();
2460}
2461
2462void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2463 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2464
2465 if (ThisDeclID == Redecl.getFirstID()) {
2466 // This FunctionTemplateDecl owns a CommonPtr; read it.
2467 SmallVector<serialization::DeclID, 32> SpecIDs;
2468 readDeclIDList(SpecIDs);
2469 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2470 }
2471}
2472
2473/// TODO: Unify with ClassTemplateSpecializationDecl version?
2474/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2475/// VarTemplate(Partial)SpecializationDecl with a new data
2476/// structure Template(Partial)SpecializationDecl, and
2477/// using Template(Partial)SpecializationDecl as input type.
2478ASTDeclReader::RedeclarableResult
2479ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2480 VarTemplateSpecializationDecl *D) {
2481 ASTContext &C = Reader.getContext();
2482 if (Decl *InstD = readDecl()) {
2483 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2484 D->SpecializedTemplate = VTD;
2485 } else {
2486 SmallVector<TemplateArgument, 8> TemplArgs;
2487 Record.readTemplateArgumentList(TemplArgs);
2488 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2489 C, TemplArgs);
2490 auto *PS =
2491 new (C)
2492 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2493 PS->PartialSpecialization =
2494 cast<VarTemplatePartialSpecializationDecl>(InstD);
2495 PS->TemplateArgs = ArgList;
2496 D->SpecializedTemplate = PS;
2497 }
2498 }
2499
2500 // Explicit info.
2501 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2502 auto *ExplicitInfo =
2503 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2504 ExplicitInfo->TypeAsWritten = TyInfo;
2505 ExplicitInfo->ExternLoc = readSourceLocation();
2506 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2507 D->ExplicitInfo = ExplicitInfo;
2508 }
2509
2510 SmallVector<TemplateArgument, 8> TemplArgs;
2511 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2512 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2513 D->PointOfInstantiation = readSourceLocation();
2514 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2515 D->IsCompleteDefinition = Record.readInt();
2516
2517 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2518
2519 bool writtenAsCanonicalDecl = Record.readInt();
2520 if (writtenAsCanonicalDecl) {
2521 auto *CanonPattern = readDeclAs<VarTemplateDecl>();
2522 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2523 VarTemplateSpecializationDecl *CanonSpec;
2524 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2525 CanonSpec = CanonPattern->getCommonPtr()
2526 ->PartialSpecializations.GetOrInsertNode(Partial);
2527 } else {
2528 CanonSpec =
2529 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2530 }
2531 // If we already have a matching specialization, merge it.
2532 if (CanonSpec != D)
2533 mergeRedeclarable<VarDecl>(D, CanonSpec, Redecl);
2534 }
2535 }
2536
2537 return Redecl;
2538}
2539
2540/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2541/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2542/// VarTemplate(Partial)SpecializationDecl with a new data
2543/// structure Template(Partial)SpecializationDecl, and
2544/// using Template(Partial)SpecializationDecl as input type.
2545void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2546 VarTemplatePartialSpecializationDecl *D) {
2547 TemplateParameterList *Params = Record.readTemplateParameterList();
2548 D->TemplateParams = Params;
2549 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2550
2551 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2552
2553 // These are read/set from/to the first declaration.
2554 if (ThisDeclID == Redecl.getFirstID()) {
2555 D->InstantiatedFromMember.setPointer(
2556 readDeclAs<VarTemplatePartialSpecializationDecl>());
2557 D->InstantiatedFromMember.setInt(Record.readInt());
2558 }
2559}
2560
2561void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2562 VisitTypeDecl(D);
2563
2564 D->setDeclaredWithTypename(Record.readInt());
2565
2566 if (Record.readBool()) {
2567 NestedNameSpecifierLoc NNS = Record.readNestedNameSpecifierLoc();
2568 DeclarationNameInfo DN = Record.readDeclarationNameInfo();
2569 ConceptDecl *NamedConcept = Record.readDeclAs<ConceptDecl>();
2570 const ASTTemplateArgumentListInfo *ArgsAsWritten = nullptr;
2571 if (Record.readBool())
2572 ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2573 Expr *ImmediatelyDeclaredConstraint = Record.readExpr();
2574 D->setTypeConstraint(NNS, DN, /*FoundDecl=*/nullptr, NamedConcept,
2575 ArgsAsWritten, ImmediatelyDeclaredConstraint);
2576 if ((D->ExpandedParameterPack = Record.readInt()))
2577 D->NumExpanded = Record.readInt();
2578 }
2579
2580 if (Record.readInt())
2581 D->setDefaultArgument(readTypeSourceInfo());
2582}
2583
2584void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2585 VisitDeclaratorDecl(D);
2586 // TemplateParmPosition.
2587 D->setDepth(Record.readInt());
2588 D->setPosition(Record.readInt());
2589 if (D->hasPlaceholderTypeConstraint())
2590 D->setPlaceholderTypeConstraint(Record.readExpr());
2591 if (D->isExpandedParameterPack()) {
2592 auto TypesAndInfos =
2593 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2594 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2595 new (&TypesAndInfos[I].first) QualType(Record.readType());
2596 TypesAndInfos[I].second = readTypeSourceInfo();
2597 }
2598 } else {
2599 // Rest of NonTypeTemplateParmDecl.
2600 D->ParameterPack = Record.readInt();
2601 if (Record.readInt())
2602 D->setDefaultArgument(Record.readExpr());
2603 }
2604}
2605
2606void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2607 VisitTemplateDecl(D);
2608 // TemplateParmPosition.
2609 D->setDepth(Record.readInt());
2610 D->setPosition(Record.readInt());
2611 if (D->isExpandedParameterPack()) {
2612 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2613 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2614 I != N; ++I)
2615 Data[I] = Record.readTemplateParameterList();
2616 } else {
2617 // Rest of TemplateTemplateParmDecl.
2618 D->ParameterPack = Record.readInt();
2619 if (Record.readInt())
2620 D->setDefaultArgument(Reader.getContext(),
2621 Record.readTemplateArgumentLoc());
2622 }
2623}
2624
2625void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2626 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2627 mergeRedeclarableTemplate(D, Redecl);
2628}
2629
2630void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2631 VisitDecl(D);
2632 D->AssertExprAndFailed.setPointer(Record.readExpr());
2633 D->AssertExprAndFailed.setInt(Record.readInt());
2634 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2635 D->RParenLoc = readSourceLocation();
2636}
2637
2638void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2639 VisitDecl(D);
2640}
2641
2642void ASTDeclReader::VisitLifetimeExtendedTemporaryDecl(
2643 LifetimeExtendedTemporaryDecl *D) {
2644 VisitDecl(D);
2645 D->ExtendingDecl = readDeclAs<ValueDecl>();
2646 D->ExprWithTemporary = Record.readStmt();
2647 if (Record.readInt()) {
2648 D->Value = new (D->getASTContext()) APValue(Record.readAPValue());
2649 D->getASTContext().addDestruction(D->Value);
2650 }
2651 D->ManglingNumber = Record.readInt();
2652 mergeMergeable(D);
2653}
2654
2655std::pair<uint64_t, uint64_t>
2656ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2657 uint64_t LexicalOffset = ReadLocalOffset();
2658 uint64_t VisibleOffset = ReadLocalOffset();
2659 return std::make_pair(LexicalOffset, VisibleOffset);
2660}
2661
2662template <typename T>
2663ASTDeclReader::RedeclarableResult
2664ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2665 DeclID FirstDeclID = readDeclID();
2666 Decl *MergeWith = nullptr;
2667
2668 bool IsKeyDecl = ThisDeclID == FirstDeclID;
1
Assuming 'FirstDeclID' is not equal to field 'ThisDeclID'
2669 bool IsFirstLocalDecl = false;
2670
2671 uint64_t RedeclOffset = 0;
2672
2673 // 0 indicates that this declaration was the only declaration of its entity,
2674 // and is used for space optimization.
2675 if (FirstDeclID == 0) {
2
Assuming 'FirstDeclID' is equal to 0
3
Taking true branch
2676 FirstDeclID = ThisDeclID;
2677 IsKeyDecl = true;
2678 IsFirstLocalDecl = true;
2679 } else if (unsigned N = Record.readInt()) {
2680 // This declaration was the first local declaration, but may have imported
2681 // other declarations.
2682 IsKeyDecl = N == 1;
2683 IsFirstLocalDecl = true;
2684
2685 // We have some declarations that must be before us in our redeclaration
2686 // chain. Read them now, and remember that we ought to merge with one of
2687 // them.
2688 // FIXME: Provide a known merge target to the second and subsequent such
2689 // declaration.
2690 for (unsigned I = 0; I != N - 1; ++I)
2691 MergeWith = readDecl();
2692
2693 RedeclOffset = ReadLocalOffset();
2694 } else {
2695 // This declaration was not the first local declaration. Read the first
2696 // local declaration now, to trigger the import of other redeclarations.
2697 (void)readDecl();
2698 }
2699
2700 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
4
Assuming null pointer is passed into cast
5
'FirstDecl' initialized to a null pointer value
2701 if (FirstDecl != D) {
6
Assuming 'FirstDecl' is not equal to 'D'
7
Taking true branch
2702 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2703 // We temporarily set the first (canonical) declaration as the previous one
2704 // which is the one that matters and mark the real previous DeclID to be
2705 // loaded & attached later on.
2706 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2707 D->First = FirstDecl->getCanonicalDecl();
8
Called C++ object pointer is null
2708 }
2709
2710 auto *DAsT = static_cast<T *>(D);
2711
2712 // Note that we need to load local redeclarations of this decl and build a
2713 // decl chain for them. This must happen *after* we perform the preloading
2714 // above; this ensures that the redeclaration chain is built in the correct
2715 // order.
2716 if (IsFirstLocalDecl)
2717 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2718
2719 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2720}
2721
2722/// Attempts to merge the given declaration (D) with another declaration
2723/// of the same entity.
2724template <typename T>
2725void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2726 RedeclarableResult &Redecl) {
2727 // If modules are not available, there is no reason to perform this merge.
2728 if (!Reader.getContext().getLangOpts().Modules)
2729 return;
2730
2731 // If we're not the canonical declaration, we don't need to merge.
2732 if (!DBase->isFirstDecl())
2733 return;
2734
2735 auto *D = static_cast<T *>(DBase);
2736
2737 if (auto *Existing = Redecl.getKnownMergeTarget())
2738 // We already know of an existing declaration we should merge with.
2739 mergeRedeclarable(D, cast<T>(Existing), Redecl);
2740 else if (FindExistingResult ExistingRes = findExisting(D))
2741 if (T *Existing = ExistingRes)
2742 mergeRedeclarable(D, Existing, Redecl);
2743}
2744
2745void ASTDeclReader::mergeRedeclarableTemplate(RedeclarableTemplateDecl *D,
2746 RedeclarableResult &Redecl) {
2747 mergeRedeclarable(D, Redecl);
2748 // If we merged the template with a prior declaration chain, merge the
2749 // common pointer.
2750 // FIXME: Actually merge here, don't just overwrite.
2751 D->Common = D->getCanonicalDecl()->Common;
2752}
2753
2754/// "Cast" to type T, asserting if we don't have an implicit conversion.
2755/// We use this to put code in a template that will only be valid for certain
2756/// instantiations.
2757template<typename T> static T assert_cast(T t) { return t; }
2758template<typename T> static T assert_cast(...) {
2759 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "clang/lib/Serialization/ASTReaderDecl.cpp"
, 2759)
;
2760}
2761
2762/// Merge together the pattern declarations from two template
2763/// declarations.
2764void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2765 RedeclarableTemplateDecl *Existing,
2766 bool IsKeyDecl) {
2767 auto *DPattern = D->getTemplatedDecl();
2768 auto *ExistingPattern = Existing->getTemplatedDecl();
2769 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2770 DPattern->getCanonicalDecl()->getGlobalID(),
2771 IsKeyDecl);
2772
2773 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2774 // Merge with any existing definition.
2775 // FIXME: This is duplicated in several places. Refactor.
2776 auto *ExistingClass =
2777 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2778 if (auto *DDD = DClass->DefinitionData) {
2779 if (ExistingClass->DefinitionData) {
2780 MergeDefinitionData(ExistingClass, std::move(*DDD));
2781 } else {
2782 ExistingClass->DefinitionData = DClass->DefinitionData;
2783 // We may have skipped this before because we thought that DClass
2784 // was the canonical declaration.
2785 Reader.PendingDefinitions.insert(DClass);
2786 }
2787 }
2788 DClass->DefinitionData = ExistingClass->DefinitionData;
2789
2790 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2791 Result);
2792 }
2793 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2794 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2795 Result);
2796 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2797 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2798 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2799 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2800 Result);
2801 llvm_unreachable("merged an unknown kind of redeclarable template")::llvm::llvm_unreachable_internal("merged an unknown kind of redeclarable template"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 2801)
;
2802}
2803
2804/// Attempts to merge the given declaration (D) with another declaration
2805/// of the same entity.
2806template <typename T>
2807void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2808 RedeclarableResult &Redecl) {
2809 auto *D = static_cast<T *>(DBase);
2810 T *ExistingCanon = Existing->getCanonicalDecl();
2811 T *DCanon = D->getCanonicalDecl();
2812 if (ExistingCanon != DCanon) {
2813 // Have our redeclaration link point back at the canonical declaration
2814 // of the existing declaration, so that this declaration has the
2815 // appropriate canonical declaration.
2816 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2817 D->First = ExistingCanon;
2818 ExistingCanon->Used |= D->Used;
2819 D->Used = false;
2820
2821 // When we merge a namespace, update its pointer to the first namespace.
2822 // We cannot have loaded any redeclarations of this declaration yet, so
2823 // there's nothing else that needs to be updated.
2824 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2825 Namespace->AnonOrFirstNamespaceAndFlags.setPointer(
2826 assert_cast<NamespaceDecl *>(ExistingCanon));
2827
2828 // When we merge a template, merge its pattern.
2829 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2830 mergeTemplatePattern(
2831 DTemplate, assert_cast<RedeclarableTemplateDecl *>(ExistingCanon),
2832 Redecl.isKeyDecl());
2833
2834 // If this declaration is a key declaration, make a note of that.
2835 if (Redecl.isKeyDecl())
2836 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2837 }
2838}
2839
2840/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2841/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2842/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2843/// that some types are mergeable during deserialization, otherwise name
2844/// lookup fails. This is the case for EnumConstantDecl.
2845static bool allowODRLikeMergeInC(NamedDecl *ND) {
2846 if (!ND)
2847 return false;
2848 // TODO: implement merge for other necessary decls.
2849 if (isa<EnumConstantDecl, FieldDecl, IndirectFieldDecl>(ND))
2850 return true;
2851 return false;
2852}
2853
2854/// Attempts to merge LifetimeExtendedTemporaryDecl with
2855/// identical class definitions from two different modules.
2856void ASTDeclReader::mergeMergeable(LifetimeExtendedTemporaryDecl *D) {
2857 // If modules are not available, there is no reason to perform this merge.
2858 if (!Reader.getContext().getLangOpts().Modules)
2859 return;
2860
2861 LifetimeExtendedTemporaryDecl *LETDecl = D;
2862
2863 LifetimeExtendedTemporaryDecl *&LookupResult =
2864 Reader.LETemporaryForMerging[std::make_pair(
2865 LETDecl->getExtendingDecl(), LETDecl->getManglingNumber())];
2866 if (LookupResult)
2867 Reader.getContext().setPrimaryMergedDecl(LETDecl,
2868 LookupResult->getCanonicalDecl());
2869 else
2870 LookupResult = LETDecl;
2871}
2872
2873/// Attempts to merge the given declaration (D) with another declaration
2874/// of the same entity, for the case where the entity is not actually
2875/// redeclarable. This happens, for instance, when merging the fields of
2876/// identical class definitions from two different modules.
2877template<typename T>
2878void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2879 // If modules are not available, there is no reason to perform this merge.
2880 if (!Reader.getContext().getLangOpts().Modules)
2881 return;
2882
2883 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2884 // Note that C identically-named things in different translation units are
2885 // not redeclarations, but may still have compatible types, where ODR-like
2886 // semantics may apply.
2887 if (!Reader.getContext().getLangOpts().CPlusPlus &&
2888 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2889 return;
2890
2891 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2892 if (T *Existing = ExistingRes)
2893 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2894 Existing->getCanonicalDecl());
2895}
2896
2897void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2898 Record.readOMPChildren(D->Data);
2899 VisitDecl(D);
2900}
2901
2902void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2903 Record.readOMPChildren(D->Data);
2904 VisitDecl(D);
2905}
2906
2907void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
2908 Record.readOMPChildren(D->Data);
2909 VisitDecl(D);
2910}
2911
2912void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2913 VisitValueDecl(D);
2914 D->setLocation(readSourceLocation());
2915 Expr *In = Record.readExpr();
2916 Expr *Out = Record.readExpr();
2917 D->setCombinerData(In, Out);
2918 Expr *Combiner = Record.readExpr();
2919 D->setCombiner(Combiner);
2920 Expr *Orig = Record.readExpr();
2921 Expr *Priv = Record.readExpr();
2922 D->setInitializerData(Orig, Priv);
2923 Expr *Init = Record.readExpr();
2924 auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2925 D->setInitializer(Init, IK);
2926 D->PrevDeclInScope = readDeclID();
2927}
2928
2929void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2930 Record.readOMPChildren(D->Data);
2931 VisitValueDecl(D);
2932 D->VarName = Record.readDeclarationName();
2933 D->PrevDeclInScope = readDeclID();
2934}
2935
2936void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2937 VisitVarDecl(D);
2938}
2939
2940//===----------------------------------------------------------------------===//
2941// Attribute Reading
2942//===----------------------------------------------------------------------===//
2943
2944namespace {
2945class AttrReader {
2946 ASTRecordReader &Reader;
2947
2948public:
2949 AttrReader(ASTRecordReader &Reader) : Reader(Reader) {}
2950
2951 uint64_t readInt() {
2952 return Reader.readInt();
2953 }
2954
2955 bool readBool() { return Reader.readBool(); }
2956
2957 SourceRange readSourceRange() {
2958 return Reader.readSourceRange();
2959 }
2960
2961 SourceLocation readSourceLocation() {
2962 return Reader.readSourceLocation();
2963 }
2964
2965 Expr *readExpr() { return Reader.readExpr(); }
2966
2967 std::string readString() {
2968 return Reader.readString();
2969 }
2970
2971 TypeSourceInfo *readTypeSourceInfo() {
2972 return Reader.readTypeSourceInfo();
2973 }
2974
2975 IdentifierInfo *readIdentifier() {
2976 return Reader.readIdentifier();
2977 }
2978
2979 VersionTuple readVersionTuple() {
2980 return Reader.readVersionTuple();
2981 }
2982
2983 OMPTraitInfo *readOMPTraitInfo() { return Reader.readOMPTraitInfo(); }
2984
2985 template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2986 return Reader.GetLocalDeclAs<T>(LocalID);
2987 }
2988};
2989}
2990
2991Attr *ASTRecordReader::readAttr() {
2992 AttrReader Record(*this);
2993 auto V = Record.readInt();
2994 if (!V)
2995 return nullptr;
2996
2997 Attr *New = nullptr;
2998 // Kind is stored as a 1-based integer because 0 is used to indicate a null
2999 // Attr pointer.
3000 auto Kind = static_cast<attr::Kind>(V - 1);
3001 ASTContext &Context = getContext();
3002
3003 IdentifierInfo *AttrName = Record.readIdentifier();
3004 IdentifierInfo *ScopeName = Record.readIdentifier();
3005 SourceRange AttrRange = Record.readSourceRange();
3006 SourceLocation ScopeLoc = Record.readSourceLocation();
3007 unsigned ParsedKind = Record.readInt();
3008 unsigned Syntax = Record.readInt();
3009 unsigned SpellingIndex = Record.readInt();
3010
3011 AttributeCommonInfo Info(AttrName, ScopeName, AttrRange, ScopeLoc,
3012 AttributeCommonInfo::Kind(ParsedKind),
3013 AttributeCommonInfo::Syntax(Syntax), SpellingIndex);
3014
3015#include "clang/Serialization/AttrPCHRead.inc"
3016
3017 assert(New && "Unable to decode attribute?")(static_cast <bool> (New && "Unable to decode attribute?"
) ? void (0) : __assert_fail ("New && \"Unable to decode attribute?\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3017, __extension__
__PRETTY_FUNCTION__))
;
3018 return New;
3019}
3020
3021/// Reads attributes from the current stream position.
3022void ASTRecordReader::readAttributes(AttrVec &Attrs) {
3023 for (unsigned I = 0, E = readInt(); I != E; ++I)
3024 if (auto *A = readAttr())
3025 Attrs.push_back(A);
3026}
3027
3028//===----------------------------------------------------------------------===//
3029// ASTReader Implementation
3030//===----------------------------------------------------------------------===//
3031
3032/// Note that we have loaded the declaration with the given
3033/// Index.
3034///
3035/// This routine notes that this declaration has already been loaded,
3036/// so that future GetDecl calls will return this declaration rather
3037/// than trying to load a new declaration.
3038inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
3039 assert(!DeclsLoaded[Index] && "Decl loaded twice?")(static_cast <bool> (!DeclsLoaded[Index] && "Decl loaded twice?"
) ? void (0) : __assert_fail ("!DeclsLoaded[Index] && \"Decl loaded twice?\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3039, __extension__
__PRETTY_FUNCTION__))
;
3040 DeclsLoaded[Index] = D;
3041}
3042
3043/// Determine whether the consumer will be interested in seeing
3044/// this declaration (via HandleTopLevelDecl).
3045///
3046/// This routine should return true for anything that might affect
3047/// code generation, e.g., inline function definitions, Objective-C
3048/// declarations with metadata, etc.
3049static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
3050 // An ObjCMethodDecl is never considered as "interesting" because its
3051 // implementation container always is.
3052
3053 // An ImportDecl or VarDecl imported from a module map module will get
3054 // emitted when we import the relevant module.
3055 if (isPartOfPerModuleInitializer(D)) {
3056 auto *M = D->getImportedOwningModule();
3057 if (M && M->Kind == Module::ModuleMapModule &&
3058 Ctx.DeclMustBeEmitted(D))
3059 return false;
3060 }
3061
3062 if (isa<FileScopeAsmDecl, TopLevelStmtDecl, ObjCProtocolDecl, ObjCImplDecl,
3063 ImportDecl, PragmaCommentDecl, PragmaDetectMismatchDecl>(D))
3064 return true;
3065 if (isa<OMPThreadPrivateDecl, OMPDeclareReductionDecl, OMPDeclareMapperDecl,
3066 OMPAllocateDecl, OMPRequiresDecl>(D))
3067 return !D->getDeclContext()->isFunctionOrMethod();
3068 if (const auto *Var = dyn_cast<VarDecl>(D))
3069 return Var->isFileVarDecl() &&
3070 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
3071 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
3072 if (const auto *Func = dyn_cast<FunctionDecl>(D))
3073 return Func->doesThisDeclarationHaveABody() || HasBody;
3074
3075 if (auto *ES = D->getASTContext().getExternalSource())
3076 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
3077 return true;
3078
3079 return false;
3080}
3081
3082/// Get the correct cursor and offset for loading a declaration.
3083ASTReader::RecordLocation
3084ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
3085 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
3086 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3086, __extension__
__PRETTY_FUNCTION__))
;
3087 ModuleFile *M = I->second;
3088 const DeclOffset &DOffs =
3089 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
3090 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
3091 return RecordLocation(M, DOffs.getBitOffset(M->DeclsBlockStartOffset));
3092}
3093
3094ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
3095 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
3096
3097 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3097, __extension__
__PRETTY_FUNCTION__))
;
3098 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
3099}
3100
3101uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint64_t LocalOffset) {
3102 return LocalOffset + M.GlobalBitOffset;
3103}
3104
3105/// Find the context in which we should search for previous declarations when
3106/// looking for declarations to merge.
3107DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3108 DeclContext *DC) {
3109 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3110 return ND->getOriginalNamespace();
3111
3112 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3113 // Try to dig out the definition.
3114 auto *DD = RD->DefinitionData;
3115 if (!DD)
3116 DD = RD->getCanonicalDecl()->DefinitionData;
3117
3118 // If there's no definition yet, then DC's definition is added by an update
3119 // record, but we've not yet loaded that update record. In this case, we
3120 // commit to DC being the canonical definition now, and will fix this when
3121 // we load the update record.
3122 if (!DD) {
3123 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3124 RD->setCompleteDefinition(true);
3125 RD->DefinitionData = DD;
3126 RD->getCanonicalDecl()->DefinitionData = DD;
3127
3128 // Track that we did this horrible thing so that we can fix it later.
3129 Reader.PendingFakeDefinitionData.insert(
3130 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3131 }
3132
3133 return DD->Definition;
3134 }
3135
3136 if (auto *RD = dyn_cast<RecordDecl>(DC))
3137 return RD->getDefinition();
3138
3139 if (auto *ED = dyn_cast<EnumDecl>(DC))
3140 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3141 : nullptr;
3142
3143 if (auto *OID = dyn_cast<ObjCInterfaceDecl>(DC))
3144 return OID->getDefinition();
3145
3146 // We can see the TU here only if we have no Sema object. In that case,
3147 // there's no TU scope to look in, so using the DC alone is sufficient.
3148 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3149 return TU;
3150
3151 return nullptr;
3152}
3153
3154ASTDeclReader::FindExistingResult::~FindExistingResult() {
3155 // Record that we had a typedef name for linkage whether or not we merge
3156 // with that declaration.
3157 if (TypedefNameForLinkage) {
3158 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3159 Reader.ImportedTypedefNamesForLinkage.insert(
3160 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3161 return;
3162 }
3163
3164 if (!AddResult || Existing)
3165 return;
3166
3167 DeclarationName Name = New->getDeclName();
3168 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3169 if (needsAnonymousDeclarationNumber(New)) {
3170 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3171 AnonymousDeclNumber, New);
3172 } else if (DC->isTranslationUnit() &&
3173 !Reader.getContext().getLangOpts().CPlusPlus) {
3174 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3175 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3176 .push_back(New);
3177 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3178 // Add the declaration to its redeclaration context so later merging
3179 // lookups will find it.
3180 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3181 }
3182}
3183
3184/// Find the declaration that should be merged into, given the declaration found
3185/// by name lookup. If we're merging an anonymous declaration within a typedef,
3186/// we need a matching typedef, and we merge with the type inside it.
3187static NamedDecl *getDeclForMerging(NamedDecl *Found,
3188 bool IsTypedefNameForLinkage) {
3189 if (!IsTypedefNameForLinkage)
3190 return Found;
3191
3192 // If we found a typedef declaration that gives a name to some other
3193 // declaration, then we want that inner declaration. Declarations from
3194 // AST files are handled via ImportedTypedefNamesForLinkage.
3195 if (Found->isFromASTFile())
3196 return nullptr;
3197
3198 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3199 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3200
3201 return nullptr;
3202}
3203
3204/// Find the declaration to use to populate the anonymous declaration table
3205/// for the given lexical DeclContext. We only care about finding local
3206/// definitions of the context; we'll merge imported ones as we go.
3207DeclContext *
3208ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3209 // For classes, we track the definition as we merge.
3210 if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3211 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3212 return DD ? DD->Definition : nullptr;
3213 } else if (auto *OID = dyn_cast<ObjCInterfaceDecl>(LexicalDC)) {
3214 return OID->getCanonicalDecl()->getDefinition();
3215 }
3216
3217 // For anything else, walk its merged redeclarations looking for a definition.
3218 // Note that we can't just call getDefinition here because the redeclaration
3219 // chain isn't wired up.
3220 for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3221 if (auto *FD = dyn_cast<FunctionDecl>(D))
3222 if (FD->isThisDeclarationADefinition())
3223 return FD;
3224 if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3225 if (MD->isThisDeclarationADefinition())
3226 return MD;
3227 if (auto *RD = dyn_cast<RecordDecl>(D))
3228 if (RD->isThisDeclarationADefinition())
3229 return RD;
3230 }
3231
3232 // No merged definition yet.
3233 return nullptr;
3234}
3235
3236NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3237 DeclContext *DC,
3238 unsigned Index) {
3239 // If the lexical context has been merged, look into the now-canonical
3240 // definition.
3241 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3242
3243 // If we've seen this before, return the canonical declaration.
3244 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3245 if (Index < Previous.size() && Previous[Index])
3246 return Previous[Index];
3247
3248 // If this is the first time, but we have parsed a declaration of the context,
3249 // build the anonymous declaration list from the parsed declaration.
3250 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3251 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3252 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3253 if (Previous.size() == Number)
3254 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3255 else
3256 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3257 });
3258 }
3259
3260 return Index < Previous.size() ? Previous[Index] : nullptr;
3261}
3262
3263void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3264 DeclContext *DC, unsigned Index,
3265 NamedDecl *D) {
3266 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3267
3268 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3269 if (Index >= Previous.size())
3270 Previous.resize(Index + 1);
3271 if (!Previous[Index])
3272 Previous[Index] = D;
3273}
3274
3275ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3276 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3277 : D->getDeclName();
3278
3279 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3280 // Don't bother trying to find unnamed declarations that are in
3281 // unmergeable contexts.
3282 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3283 AnonymousDeclNumber, TypedefNameForLinkage);
3284 Result.suppress();
3285 return Result;
3286 }
3287
3288 ASTContext &C = Reader.getContext();
3289 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3290 if (TypedefNameForLinkage) {
3291 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3292 std::make_pair(DC, TypedefNameForLinkage));
3293 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3294 if (C.isSameEntity(It->second, D))
3295 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3296 TypedefNameForLinkage);
3297 // Go on to check in other places in case an existing typedef name
3298 // was not imported.
3299 }
3300
3301 if (needsAnonymousDeclarationNumber(D)) {
3302 // This is an anonymous declaration that we may need to merge. Look it up
3303 // in its context by number.
3304 if (auto *Existing = getAnonymousDeclForMerging(
3305 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3306 if (C.isSameEntity(Existing, D))
3307 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3308 TypedefNameForLinkage);
3309 } else if (DC->isTranslationUnit() &&
3310 !Reader.getContext().getLangOpts().CPlusPlus) {
3311 IdentifierResolver &IdResolver = Reader.getIdResolver();
3312
3313 // Temporarily consider the identifier to be up-to-date. We don't want to
3314 // cause additional lookups here.
3315 class UpToDateIdentifierRAII {
3316 IdentifierInfo *II;
3317 bool WasOutToDate = false;
3318
3319 public:
3320 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3321 if (II) {
3322 WasOutToDate = II->isOutOfDate();
3323 if (WasOutToDate)
3324 II->setOutOfDate(false);
3325 }
3326 }
3327
3328 ~UpToDateIdentifierRAII() {
3329 if (WasOutToDate)
3330 II->setOutOfDate(true);
3331 }
3332 } UpToDate(Name.getAsIdentifierInfo());
3333
3334 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3335 IEnd = IdResolver.end();
3336 I != IEnd; ++I) {
3337 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3338 if (C.isSameEntity(Existing, D))
3339 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3340 TypedefNameForLinkage);
3341 }
3342 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3343 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3344 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3345 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3346 if (C.isSameEntity(Existing, D))
3347 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3348 TypedefNameForLinkage);
3349 }
3350 } else {
3351 // Not in a mergeable context.
3352 return FindExistingResult(Reader);
3353 }
3354
3355 // If this declaration is from a merged context, make a note that we need to
3356 // check that the canonical definition of that context contains the decl.
3357 //
3358 // FIXME: We should do something similar if we merge two definitions of the
3359 // same template specialization into the same CXXRecordDecl.
3360 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3361 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3362 MergedDCIt->second == D->getDeclContext())
3363 Reader.PendingOdrMergeChecks.push_back(D);
3364
3365 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3366 AnonymousDeclNumber, TypedefNameForLinkage);
3367}
3368
3369template<typename DeclT>
3370Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3371 return D->RedeclLink.getLatestNotUpdated();
3372}
3373
3374Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3375 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3375)
;
3376}
3377
3378Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3379 assert(D)(static_cast <bool> (D) ? void (0) : __assert_fail ("D"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3379, __extension__
__PRETTY_FUNCTION__))
;
3380
3381 switch (D->getKind()) {
3382#define ABSTRACT_DECL(TYPE)
3383#define DECL(TYPE, BASE) \
3384 case Decl::TYPE: \
3385 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3386#include "clang/AST/DeclNodes.inc"
3387 }
3388 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "clang/lib/Serialization/ASTReaderDecl.cpp"
, 3388)
;
3389}
3390
3391Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3392 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3393}
3394
3395void ASTDeclReader::mergeInheritableAttributes(ASTReader &Reader, Decl *D,
3396 Decl *Previous) {
3397 InheritableAttr *NewAttr = nullptr;
3398 ASTContext &Context = Reader.getContext();
3399 const auto *IA = Previous->getAttr<MSInheritanceAttr>();
3400
3401 if (IA && !D->hasAttr<MSInheritanceAttr>()) {
3402 NewAttr = cast<InheritableAttr>(IA->clone(Context));
3403 NewAttr->setInherited(true);
3404 D->addAttr(NewAttr);
3405 }
3406
3407 const auto *AA = Previous->getAttr<AvailabilityAttr>();
3408 if (AA && !D->hasAttr<AvailabilityAttr>()) {
3409 NewAttr = AA->clone(Context);
3410 NewAttr->setInherited(true);
3411 D->addAttr(NewAttr);
3412 }
3413}
3414
3415template<typename DeclT>
3416void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3417 Redeclarable<DeclT> *D,
3418 Decl *Previous, Decl *Canon) {
3419 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3420 D->First = cast<DeclT>(Previous)->First;
3421}
3422
3423namespace clang {
3424
3425template<>
3426void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3427 Redeclarable<VarDecl> *D,
3428 Decl *Previous, Decl *Canon) {
3429 auto *VD = static_cast<VarDecl *>(D);
3430 auto *PrevVD = cast<VarDecl>(Previous);
3431 D->RedeclLink.setPrevious(PrevVD);
3432 D->First = PrevVD->First;
3433
3434 // We should keep at most one definition on the chain.
3435 // FIXME: Cache the definition once we've found it. Building a chain with
3436 // N definitions currently takes O(N^2) time here.
3437 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3438 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3439 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3440 Reader.mergeDefinitionVisibility(CurD, VD);
3441 VD->demoteThisDefinitionToDeclaration();
3442 break;
3443 }
3444 }
3445 }
3446}
3447
3448static bool isUndeducedReturnType(QualType T) {
3449 auto *DT = T->getContainedDeducedType();
3450 return DT && !DT->isDeduced();
3451}
3452
3453template<>
3454void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3455 Redeclarable<FunctionDecl> *D,
3456 Decl *Previous, Decl *Canon) {
3457 auto *FD = static_cast<FunctionDecl *>(D);
3458 auto *PrevFD = cast<FunctionDecl>(Previous);
3459
3460 FD->RedeclLink.setPrevious(PrevFD);
3461 FD->First = PrevFD->First;
3462
3463 // If the previous declaration is an inline function declaration, then this
3464 // declaration is too.
3465 if (PrevFD->isInlined() != FD->isInlined()) {
3466 // FIXME: [dcl.fct.spec]p4:
3467 // If a function with external linkage is declared inline in one
3468 // translation unit, it shall be declared inline in all translation
3469 // units in which it appears.
3470 //
3471 // Be careful of this case:
3472 //
3473 // module A:
3474 // template<typename T> struct X { void f(); };
3475 // template<typename T> inline void X<T>::f() {}
3476 //
3477 // module B instantiates the declaration of X<int>::f
3478 // module C instantiates the definition of X<int>::f
3479 //
3480 // If module B and C are merged, we do not have a violation of this rule.
3481 FD->setImplicitlyInline(true);
3482 }
3483
3484 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3485 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3486 if (FPT && PrevFPT) {
3487 // If we need to propagate an exception specification along the redecl
3488 // chain, make a note of that so that we can do so later.
3489 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3490 bool WasUnresolved =
3491 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3492 if (IsUnresolved != WasUnresolved)
3493 Reader.PendingExceptionSpecUpdates.insert(
3494 {Canon, IsUnresolved ? PrevFD : FD});
3495
3496 // If we need to propagate a deduced return type along the redecl chain,
3497 // make a note of that so that we can do it later.
3498 bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3499 bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3500 if (IsUndeduced != WasUndeduced)
3501 Reader.PendingDeducedTypeUpdates.insert(
3502 {cast<FunctionDecl>(Canon),
3503 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3504 }
3505}
3506
3507} // namespace clang
3508
3509void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3510 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3510)
;
3511}
3512
3513/// Inherit the default template argument from \p From to \p To. Returns
3514/// \c false if there is no default template for \p From.
3515template <typename ParmDecl>
3516static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3517 Decl *ToD) {
3518 auto *To = cast<ParmDecl>(ToD);
3519 if (!From->hasDefaultArgument())
3520 return false;
3521 To->setInheritedDefaultArgument(Context, From);
3522 return true;
3523}
3524
3525static void inheritDefaultTemplateArguments(ASTContext &Context,
3526 TemplateDecl *From,
3527 TemplateDecl *To) {
3528 auto *FromTP = From->getTemplateParameters();
3529 auto *ToTP = To->getTemplateParameters();
3530 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?\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3530, __extension__
__PRETTY_FUNCTION__))
;
3531
3532 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3533 NamedDecl *FromParam = FromTP->getParam(I);
3534 NamedDecl *ToParam = ToTP->getParam(I);
3535
3536 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3537 inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3538 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3539 inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3540 else
3541 inheritDefaultTemplateArgument(
3542 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3543 }
3544}
3545
3546void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3547 Decl *Previous, Decl *Canon) {
3548 assert(D && Previous)(static_cast <bool> (D && Previous) ? void (0) :
__assert_fail ("D && Previous", "clang/lib/Serialization/ASTReaderDecl.cpp"
, 3548, __extension__ __PRETTY_FUNCTION__))
;
3549
3550 switch (D->getKind()) {
3551#define ABSTRACT_DECL(TYPE)
3552#define DECL(TYPE, BASE) \
3553 case Decl::TYPE: \
3554 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3555 break;
3556#include "clang/AST/DeclNodes.inc"
3557 }
3558
3559 // If the declaration was visible in one module, a redeclaration of it in
3560 // another module remains visible even if it wouldn't be visible by itself.
3561 //
3562 // FIXME: In this case, the declaration should only be visible if a module
3563 // that makes it visible has been imported.
3564 D->IdentifierNamespace |=
3565 Previous->IdentifierNamespace &
3566 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3567
3568 // If the declaration declares a template, it may inherit default arguments
3569 // from the previous declaration.
3570 if (auto *TD = dyn_cast<TemplateDecl>(D))
3571 inheritDefaultTemplateArguments(Reader.getContext(),
3572 cast<TemplateDecl>(Previous), TD);
3573
3574 // If any of the declaration in the chain contains an Inheritable attribute,
3575 // it needs to be added to all the declarations in the redeclarable chain.
3576 // FIXME: Only the logic of merging MSInheritableAttr is present, it should
3577 // be extended for all inheritable attributes.
3578 mergeInheritableAttributes(Reader, D, Previous);
3579}
3580
3581template<typename DeclT>
3582void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3583 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3584}
3585
3586void ASTDeclReader::attachLatestDeclImpl(...) {
3587 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3587)
;
3588}
3589
3590void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3591 assert(D && Latest)(static_cast <bool> (D && Latest) ? void (0) : __assert_fail
("D && Latest", "clang/lib/Serialization/ASTReaderDecl.cpp"
, 3591, __extension__ __PRETTY_FUNCTION__))
;
3592
3593 switch (D->getKind()) {
3594#define ABSTRACT_DECL(TYPE)
3595#define DECL(TYPE, BASE) \
3596 case Decl::TYPE: \
3597 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3598 break;
3599#include "clang/AST/DeclNodes.inc"
3600 }
3601}
3602
3603template<typename DeclT>
3604void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3605 D->RedeclLink.markIncomplete();
3606}
3607
3608void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3609 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3609)
;
3610}
3611
3612void ASTReader::markIncompleteDeclChain(Decl *D) {
3613 switch (D->getKind()) {
3614#define ABSTRACT_DECL(TYPE)
3615#define DECL(TYPE, BASE) \
3616 case Decl::TYPE: \
3617 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3618 break;
3619#include "clang/AST/DeclNodes.inc"
3620 }
3621}
3622
3623/// Read the declaration at the given offset from the AST file.
3624Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3625 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3626 SourceLocation DeclLoc;
3627 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3628 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3629 // Keep track of where we are in the stream, then jump back there
3630 // after reading this declaration.
3631 SavedStreamPosition SavedPosition(DeclsCursor);
3632
3633 ReadingKindTracker ReadingKind(Read_Decl, *this);
3634
3635 // Note that we are loading a declaration record.
3636 Deserializing ADecl(this);
3637
3638 auto Fail = [](const char *what, llvm::Error &&Err) {
3639 llvm::report_fatal_error(Twine("ASTReader::readDeclRecord failed ") + what +
3640 ": " + toString(std::move(Err)));
3641 };
3642
3643 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(Loc.Offset))
3644 Fail("jumping", std::move(JumpFailed));
3645 ASTRecordReader Record(*this, *Loc.F);
3646 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3647 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3648 if (!MaybeCode)
3649 Fail("reading code", MaybeCode.takeError());
3650 unsigned Code = MaybeCode.get();
3651
3652 ASTContext &Context = getContext();
3653 Decl *D = nullptr;
3654 Expected<unsigned> MaybeDeclCode = Record.readRecord(DeclsCursor, Code);
3655 if (!MaybeDeclCode)
3656 llvm::report_fatal_error(
3657 Twine("ASTReader::readDeclRecord failed reading decl code: ") +
3658 toString(MaybeDeclCode.takeError()));
3659 switch ((DeclCode)MaybeDeclCode.get()) {
3660 case DECL_CONTEXT_LEXICAL:
3661 case DECL_CONTEXT_VISIBLE:
3662 llvm_unreachable("Record cannot be de-serialized with readDeclRecord")::llvm::llvm_unreachable_internal("Record cannot be de-serialized with readDeclRecord"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3662)
;
3663 case DECL_TYPEDEF:
3664 D = TypedefDecl::CreateDeserialized(Context, ID);
3665 break;
3666 case DECL_TYPEALIAS:
3667 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3668 break;
3669 case DECL_ENUM:
3670 D = EnumDecl::CreateDeserialized(Context, ID);
3671 break;
3672 case DECL_RECORD:
3673 D = RecordDecl::CreateDeserialized(Context, ID);
3674 break;
3675 case DECL_ENUM_CONSTANT:
3676 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3677 break;
3678 case DECL_FUNCTION:
3679 D = FunctionDecl::CreateDeserialized(Context, ID);
3680 break;
3681 case DECL_LINKAGE_SPEC:
3682 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3683 break;
3684 case DECL_EXPORT:
3685 D = ExportDecl::CreateDeserialized(Context, ID);
3686 break;
3687 case DECL_LABEL:
3688 D = LabelDecl::CreateDeserialized(Context, ID);
3689 break;
3690 case DECL_NAMESPACE:
3691 D = NamespaceDecl::CreateDeserialized(Context, ID);
3692 break;
3693 case DECL_NAMESPACE_ALIAS:
3694 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3695 break;
3696 case DECL_USING:
3697 D = UsingDecl::CreateDeserialized(Context, ID);
3698 break;
3699 case DECL_USING_PACK:
3700 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3701 break;
3702 case DECL_USING_SHADOW:
3703 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3704 break;
3705 case DECL_USING_ENUM:
3706 D = UsingEnumDecl::CreateDeserialized(Context, ID);
3707 break;
3708 case DECL_CONSTRUCTOR_USING_SHADOW:
3709 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3710 break;
3711 case DECL_USING_DIRECTIVE:
3712 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3713 break;
3714 case DECL_UNRESOLVED_USING_VALUE:
3715 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3716 break;
3717 case DECL_UNRESOLVED_USING_TYPENAME:
3718 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3719 break;
3720 case DECL_UNRESOLVED_USING_IF_EXISTS:
3721 D = UnresolvedUsingIfExistsDecl::CreateDeserialized(Context, ID);
3722 break;
3723 case DECL_CXX_RECORD:
3724 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3725 break;
3726 case DECL_CXX_DEDUCTION_GUIDE:
3727 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3728 break;
3729 case DECL_CXX_METHOD:
3730 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3731 break;
3732 case DECL_CXX_CONSTRUCTOR:
3733 D = CXXConstructorDecl::CreateDeserialized(Context, ID, Record.readInt());
3734 break;
3735 case DECL_CXX_DESTRUCTOR:
3736 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3737 break;
3738 case DECL_CXX_CONVERSION:
3739 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3740 break;
3741 case DECL_ACCESS_SPEC:
3742 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3743 break;
3744 case DECL_FRIEND:
3745 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3746 break;
3747 case DECL_FRIEND_TEMPLATE:
3748 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3749 break;
3750 case DECL_CLASS_TEMPLATE:
3751 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3752 break;
3753 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3754 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3755 break;
3756 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3757 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3758 break;
3759 case DECL_VAR_TEMPLATE:
3760 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3761 break;
3762 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3763 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3764 break;
3765 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3766 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3767 break;
3768 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3769 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3770 break;
3771 case DECL_FUNCTION_TEMPLATE:
3772 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3773 break;
3774 case DECL_TEMPLATE_TYPE_PARM: {
3775 bool HasTypeConstraint = Record.readInt();
3776 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID,
3777 HasTypeConstraint);
3778 break;
3779 }
3780 case DECL_NON_TYPE_TEMPLATE_PARM: {
3781 bool HasTypeConstraint = Record.readInt();
3782 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3783 HasTypeConstraint);
3784 break;
3785 }
3786 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK: {
3787 bool HasTypeConstraint = Record.readInt();
3788 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3789 Record.readInt(),
3790 HasTypeConstraint);
3791 break;
3792 }
3793 case DECL_TEMPLATE_TEMPLATE_PARM:
3794 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3795 break;
3796 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3797 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3798 Record.readInt());
3799 break;
3800 case DECL_TYPE_ALIAS_TEMPLATE:
3801 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3802 break;
3803 case DECL_CONCEPT:
3804 D = ConceptDecl::CreateDeserialized(Context, ID);
3805 break;
3806 case DECL_REQUIRES_EXPR_BODY:
3807 D = RequiresExprBodyDecl::CreateDeserialized(Context, ID);
3808 break;
3809 case DECL_STATIC_ASSERT:
3810 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3811 break;
3812 case DECL_OBJC_METHOD:
3813 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3814 break;
3815 case DECL_OBJC_INTERFACE:
3816 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3817 break;
3818 case DECL_OBJC_IVAR:
3819 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3820 break;
3821 case DECL_OBJC_PROTOCOL:
3822 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3823 break;
3824 case DECL_OBJC_AT_DEFS_FIELD:
3825 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3826 break;
3827 case DECL_OBJC_CATEGORY:
3828 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3829 break;
3830 case DECL_OBJC_CATEGORY_IMPL:
3831 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3832 break;
3833 case DECL_OBJC_IMPLEMENTATION:
3834 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3835 break;
3836 case DECL_OBJC_COMPATIBLE_ALIAS:
3837 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3838 break;
3839 case DECL_OBJC_PROPERTY:
3840 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3841 break;
3842 case DECL_OBJC_PROPERTY_IMPL:
3843 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3844 break;
3845 case DECL_FIELD:
3846 D = FieldDecl::CreateDeserialized(Context, ID);
3847 break;
3848 case DECL_INDIRECTFIELD:
3849 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3850 break;
3851 case DECL_VAR:
3852 D = VarDecl::CreateDeserialized(Context, ID);
3853 break;
3854 case DECL_IMPLICIT_PARAM:
3855 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3856 break;
3857 case DECL_PARM_VAR:
3858 D = ParmVarDecl::CreateDeserialized(Context, ID);
3859 break;
3860 case DECL_DECOMPOSITION:
3861 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3862 break;
3863 case DECL_BINDING:
3864 D = BindingDecl::CreateDeserialized(Context, ID);
3865 break;
3866 case DECL_FILE_SCOPE_ASM:
3867 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3868 break;
3869 case DECL_TOP_LEVEL_STMT_DECL:
3870 D = TopLevelStmtDecl::CreateDeserialized(Context, ID);
3871 break;
3872 case DECL_BLOCK:
3873 D = BlockDecl::CreateDeserialized(Context, ID);
3874 break;
3875 case DECL_MS_PROPERTY:
3876 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3877 break;
3878 case DECL_MS_GUID:
3879 D = MSGuidDecl::CreateDeserialized(Context, ID);
3880 break;
3881 case DECL_UNNAMED_GLOBAL_CONSTANT:
3882 D = UnnamedGlobalConstantDecl::CreateDeserialized(Context, ID);
3883 break;
3884 case DECL_TEMPLATE_PARAM_OBJECT:
3885 D = TemplateParamObjectDecl::CreateDeserialized(Context, ID);
3886 break;
3887 case DECL_CAPTURED:
3888 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3889 break;
3890 case DECL_CXX_BASE_SPECIFIERS:
3891 Error("attempt to read a C++ base-specifier record as a declaration");
3892 return nullptr;
3893 case DECL_CXX_CTOR_INITIALIZERS:
3894 Error("attempt to read a C++ ctor initializer record as a declaration");
3895 return nullptr;
3896 case DECL_IMPORT:
3897 // Note: last entry of the ImportDecl record is the number of stored source
3898 // locations.
3899 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3900 break;
3901 case DECL_OMP_THREADPRIVATE: {
3902 Record.skipInts(1);
3903 unsigned NumChildren = Record.readInt();
3904 Record.skipInts(1);
3905 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, NumChildren);
3906 break;
3907 }
3908 case DECL_OMP_ALLOCATE: {
3909 unsigned NumClauses = Record.readInt();
3910 unsigned NumVars = Record.readInt();
3911 Record.skipInts(1);
3912 D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
3913 break;
3914 }
3915 case DECL_OMP_REQUIRES: {
3916 unsigned NumClauses = Record.readInt();
3917 Record.skipInts(2);
3918 D = OMPRequiresDecl::CreateDeserialized(Context, ID, NumClauses);
3919 break;
3920 }
3921 case DECL_OMP_DECLARE_REDUCTION:
3922 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3923 break;
3924 case DECL_OMP_DECLARE_MAPPER: {
3925 unsigned NumClauses = Record.readInt();
3926 Record.skipInts(2);
3927 D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, NumClauses);
3928 break;
3929 }
3930 case DECL_OMP_CAPTUREDEXPR:
3931 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3932 break;
3933 case DECL_PRAGMA_COMMENT:
3934 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3935 break;
3936 case DECL_PRAGMA_DETECT_MISMATCH:
3937 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3938 Record.readInt());
3939 break;
3940 case DECL_EMPTY:
3941 D = EmptyDecl::CreateDeserialized(Context, ID);
3942 break;
3943 case DECL_LIFETIME_EXTENDED_TEMPORARY:
3944 D = LifetimeExtendedTemporaryDecl::CreateDeserialized(Context, ID);
3945 break;
3946 case DECL_OBJC_TYPE_PARAM:
3947 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3948 break;
3949 case DECL_HLSL_BUFFER:
3950 D = HLSLBufferDecl::CreateDeserialized(Context, ID);
3951 break;
3952 case DECL_IMPLICIT_CONCEPT_SPECIALIZATION:
3953 D = ImplicitConceptSpecializationDecl::CreateDeserialized(Context, ID,
3954 Record.readInt());
3955 break;
3956 }
3957
3958 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3958, __extension__
__PRETTY_FUNCTION__))
;
3959 LoadedDecl(Index, D);
3960 // Set the DeclContext before doing any deserialization, to make sure internal
3961 // calls to Decl::getASTContext() by Decl's methods will find the
3962 // TranslationUnitDecl without crashing.
3963 D->setDeclContext(Context.getTranslationUnitDecl());
3964 Reader.Visit(D);
3965
3966 // If this declaration is also a declaration context, get the
3967 // offsets for its tables of lexical and visible declarations.
3968 if (auto *DC = dyn_cast<DeclContext>(D)) {
3969 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3970 if (Offsets.first &&
3971 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3972 return nullptr;
3973 if (Offsets.second &&
3974 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3975 return nullptr;
3976 }
3977 assert(Record.getIdx() == Record.size())(static_cast <bool> (Record.getIdx() == Record.size()) ?
void (0) : __assert_fail ("Record.getIdx() == Record.size()"
, "clang/lib/Serialization/ASTReaderDecl.cpp", 3977, __extension__
__PRETTY_FUNCTION__))
;
3978
3979 // Load any relevant update records.
3980 PendingUpdateRecords.push_back(
3981 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3982
3983 // Load the categories after recursive loading is finished.
3984 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3985 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3986 // we put the Decl in PendingDefinitions so we can pull the categories here.
3987 if (Class->isThisDeclarationADefinition() ||
3988 PendingDefinitions.count(Class))
3989 loadObjCCategories(ID, Class);
3990
3991 // If we have deserialized a declaration that has a definition the
3992 // AST consumer might need to know about, queue it.
3993 // We don't pass it to the consumer immediately because we may be in recursive
3994 // loading, and some declarations may still be initializing.
3995 PotentiallyInterestingDecls.push_back(
3996 InterestingDecl(D, Reader.hasPendingBody()));
3997
3998 return D;
3999}
4000
4001void ASTReader::PassInterestingDeclsToConsumer() {
4002 assert(Consumer)(static_cast <bool> (Consumer) ? void (0) : __assert_fail
("Consumer", "clang/lib/Serialization/ASTReaderDecl.cpp", 4002
, __extension__ __PRETTY_FUNCTION__))
;
4003
4004 if (PassingDeclsToConsumer)
4005 return;
4006
4007 // Guard variable to avoid recursively redoing the process of passing
4008 // decls to consumer.
4009 SaveAndRestore GuardPassingDeclsToConsumer(PassingDeclsToConsumer, true);
4010
4011 // Ensure that we've loaded all potentially-interesting declarations
4012 // that need to be eagerly loaded.
4013 for (auto ID : EagerlyDeserializedDecls)
4014 GetDecl(ID);
4015 EagerlyDeserializedDecls.clear();
4016
4017 while (!PotentiallyInterestingDecls.empty()) {
4018 InterestingDecl D = PotentiallyInterestingDecls.front();
4019 PotentiallyInterestingDecls.pop_front();
4020 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
4021 PassInterestingDeclToConsumer(D.getDecl());
4022 }
4023}
4024
4025void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4026 // The declaration may have been modified by files later in the chain.
4027 // If this is the case, read the record containing the updates from each file
4028 // and pass it to ASTDeclReader to make the modifications.
4029 serialization::GlobalDeclID ID = Record.ID;
4030 Decl *D = Record.D;
4031 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4032 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
4033
4034 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
4035
4036 if (UpdI != DeclUpdateOffsets.end()) {
4037 auto UpdateOffsets = std::move(UpdI->second);
4038 DeclUpdateOffsets.erase(UpdI);
4039
4040 // Check if this decl was interesting to the consumer. If we just loaded
4041 // the declaration, then we know it was interesting and we skip the call
4042 // to isConsumerInterestedIn because it is unsafe to call in the
4043 // current ASTReader state.
4044 bool WasInteresting =
4045 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
4046 for (auto &FileAndOffset : UpdateOffsets) {
4047 ModuleFile *F = FileAndOffset.first;
4048 uint64_t Offset = FileAndOffset.second;
4049 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4050 SavedStreamPosition SavedPosition(Cursor);
4051 if (llvm::Error JumpFailed = Cursor.JumpToBit(Offset))
4052 // FIXME don't do a fatal error.
4053 llvm::report_fatal_error(
4054 Twine("ASTReader::loadDeclUpdateRecords failed jumping: ") +
4055 toString(std::move(JumpFailed)));
4056 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4057 if (!MaybeCode)
4058 llvm::report_fatal_error(
4059 Twine("ASTReader::loadDeclUpdateRecords failed reading code: ") +
4060 toString(MaybeCode.takeError()));
4061 unsigned Code = MaybeCode.get();
4062 ASTRecordReader Record(*this, *F);
4063 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, Code))
4064 assert(MaybeRecCode.get() == DECL_UPDATES &&(static_cast <bool> (MaybeRecCode.get() == DECL_UPDATES
&& "Expected DECL_UPDATES record!") ? void (0) : __assert_fail
("MaybeRecCode.get() == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4065, __extension__
__PRETTY_FUNCTION__))
4065 "Expected DECL_UPDATES record!")(static_cast <bool> (MaybeRecCode.get() == DECL_UPDATES
&& "Expected DECL_UPDATES record!") ? void (0) : __assert_fail
("MaybeRecCode.get() == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4065, __extension__
__PRETTY_FUNCTION__))
;
4066 else
4067 llvm::report_fatal_error(
4068 Twine("ASTReader::loadDeclUpdateRecords failed reading rec code: ") +
4069 toString(MaybeCode.takeError()));
4070
4071 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4072 SourceLocation());
4073 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4074
4075 // We might have made this declaration interesting. If so, remember that
4076 // we need to hand it off to the consumer.
4077 if (!WasInteresting &&
4078 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4079 PotentiallyInterestingDecls.push_back(
4080 InterestingDecl(D, Reader.hasPendingBody()));
4081 WasInteresting = true;
4082 }
4083 }
4084 }
4085 // Add the lazy specializations to the template.
4086 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||(static_cast <bool> ((PendingLazySpecializationIDs.empty
() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl
, VarTemplateDecl>(D)) && "Must not have pending specializations"
) ? void (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl, VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4088, __extension__
__PRETTY_FUNCTION__))
4087 isa<FunctionTemplateDecl, VarTemplateDecl>(D)) &&(static_cast <bool> ((PendingLazySpecializationIDs.empty
() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl
, VarTemplateDecl>(D)) && "Must not have pending specializations"
) ? void (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl, VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4088, __extension__
__PRETTY_FUNCTION__))
4088 "Must not have pending specializations")(static_cast <bool> ((PendingLazySpecializationIDs.empty
() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl
, VarTemplateDecl>(D)) && "Must not have pending specializations"
) ? void (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl, VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4088, __extension__
__PRETTY_FUNCTION__))
;
4089 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4090 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4091 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4092 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4093 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4094 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4095 PendingLazySpecializationIDs.clear();
4096
4097 // Load the pending visible updates for this decl context, if it has any.
4098 auto I = PendingVisibleUpdates.find(ID);
4099 if (I != PendingVisibleUpdates.end()) {
4100 auto VisibleUpdates = std::move(I->second);
4101 PendingVisibleUpdates.erase(I);
4102
4103 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4104 for (const auto &Update : VisibleUpdates)
4105 Lookups[DC].Table.add(
4106 Update.Mod, Update.Data,
4107 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4108 DC->setHasExternalVisibleStorage(true);
4109 }
4110}
4111
4112void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4113 // Attach FirstLocal to the end of the decl chain.
4114 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4115 if (FirstLocal != CanonDecl) {
4116 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4117 ASTDeclReader::attachPreviousDecl(
4118 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4119 CanonDecl);
4120 }
4121
4122 if (!LocalOffset) {
4123 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4124 return;
4125 }
4126
4127 // Load the list of other redeclarations from this module file.
4128 ModuleFile *M = getOwningModuleFile(FirstLocal);
4129 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4129, __extension__
__PRETTY_FUNCTION__))
;
4130
4131 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4132 SavedStreamPosition SavedPosition(Cursor);
4133 if (llvm::Error JumpFailed = Cursor.JumpToBit(LocalOffset))
4134 llvm::report_fatal_error(
4135 Twine("ASTReader::loadPendingDeclChain failed jumping: ") +
4136 toString(std::move(JumpFailed)));
4137
4138 RecordData Record;
4139 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4140 if (!MaybeCode)
4141 llvm::report_fatal_error(
4142 Twine("ASTReader::loadPendingDeclChain failed reading code: ") +
4143 toString(MaybeCode.takeError()));
4144 unsigned Code = MaybeCode.get();
4145 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record))
4146 assert(MaybeRecCode.get() == LOCAL_REDECLARATIONS &&(static_cast <bool> (MaybeRecCode.get() == LOCAL_REDECLARATIONS
&& "expected LOCAL_REDECLARATIONS record!") ? void (
0) : __assert_fail ("MaybeRecCode.get() == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4147, __extension__
__PRETTY_FUNCTION__))
4147 "expected LOCAL_REDECLARATIONS record!")(static_cast <bool> (MaybeRecCode.get() == LOCAL_REDECLARATIONS
&& "expected LOCAL_REDECLARATIONS record!") ? void (
0) : __assert_fail ("MaybeRecCode.get() == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4147, __extension__
__PRETTY_FUNCTION__))
;
4148 else
4149 llvm::report_fatal_error(
4150 Twine("ASTReader::loadPendingDeclChain failed reading rec code: ") +
4151 toString(MaybeCode.takeError()));
4152
4153 // FIXME: We have several different dispatches on decl kind here; maybe
4154 // we should instead generate one loop per kind and dispatch up-front?
4155 Decl *MostRecent = FirstLocal;
4156 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4157 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4158 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4159 MostRecent = D;
4160 }
4161 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4162}
4163
4164namespace {
4165
4166 /// Given an ObjC interface, goes through the modules and links to the
4167 /// interface all the categories for it.
4168 class ObjCCategoriesVisitor {
4169 ASTReader &Reader;
4170 ObjCInterfaceDecl *Interface;
4171 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4172 ObjCCategoryDecl *Tail = nullptr;
4173 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4174 serialization::GlobalDeclID InterfaceID;
4175 unsigned PreviousGeneration;
4176
4177 void add(ObjCCategoryDecl *Cat) {
4178 // Only process each category once.
4179 if (!Deserialized.erase(Cat))
4180 return;
4181
4182 // Check for duplicate categories.
4183 if (Cat->getDeclName()) {
4184 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4185 if (Existing && Reader.getOwningModuleFile(Existing) !=
4186 Reader.getOwningModuleFile(Cat)) {
4187 llvm::DenseSet<std::pair<Decl *, Decl *>> NonEquivalentDecls;
4188 StructuralEquivalenceContext Ctx(
4189 Cat->getASTContext(), Existing->getASTContext(),
4190 NonEquivalentDecls, StructuralEquivalenceKind::Default,
4191 /*StrictTypeSpelling =*/false,
4192 /*Complain =*/false,
4193 /*ErrorOnTagTypeMismatch =*/true);
4194 if (!Ctx.IsEquivalent(Cat, Existing)) {
4195 // Warn only if the categories with the same name are different.
4196 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4197 << Interface->getDeclName() << Cat->getDeclName();
4198 Reader.Diag(Existing->getLocation(),
4199 diag::note_previous_definition);
4200 }
4201 } else if (!Existing) {
4202 // Record this category.
4203 Existing = Cat;
4204 }
4205 }
4206
4207 // Add this category to the end of the chain.
4208 if (Tail)
4209 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4210 else
4211 Interface->setCategoryListRaw(Cat);
4212 Tail = Cat;
4213 }
4214
4215 public:
4216 ObjCCategoriesVisitor(ASTReader &Reader,
4217 ObjCInterfaceDecl *Interface,
4218 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4219 serialization::GlobalDeclID InterfaceID,
4220 unsigned PreviousGeneration)
4221 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4222 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4223 // Populate the name -> category map with the set of known categories.
4224 for (auto *Cat : Interface->known_categories()) {
4225 if (Cat->getDeclName())
4226 NameCategoryMap[Cat->getDeclName()] = Cat;
4227
4228 // Keep track of the tail of the category list.
4229 Tail = Cat;
4230 }
4231 }
4232
4233 bool operator()(ModuleFile &M) {
4234 // If we've loaded all of the category information we care about from
4235 // this module file, we're done.
4236 if (M.Generation <= PreviousGeneration)
4237 return true;
4238
4239 // Map global ID of the definition down to the local ID used in this
4240 // module file. If there is no such mapping, we'll find nothing here
4241 // (or in any module it imports).
4242 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4243 if (!LocalID)
4244 return true;
4245
4246 // Perform a binary search to find the local redeclarations for this
4247 // declaration (if any).
4248 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4249 const ObjCCategoriesInfo *Result
4250 = std::lower_bound(M.ObjCCategoriesMap,
4251 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4252 Compare);
4253 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4254 Result->DefinitionID != LocalID) {
4255 // We didn't find anything. If the class definition is in this module
4256 // file, then the module files it depends on cannot have any categories,
4257 // so suppress further lookup.
4258 return Reader.isDeclIDFromModule(InterfaceID, M);
4259 }
4260
4261 // We found something. Dig out all of the categories.
4262 unsigned Offset = Result->Offset;
4263 unsigned N = M.ObjCCategories[Offset];
4264 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4265 for (unsigned I = 0; I != N; ++I)
4266 add(cast_or_null<ObjCCategoryDecl>(
4267 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4268 return true;
4269 }
4270 };
4271
4272} // namespace
4273
4274void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4275 ObjCInterfaceDecl *D,
4276 unsigned PreviousGeneration) {
4277 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4278 PreviousGeneration);
4279 ModuleMgr.visit(Visitor);
4280}
4281
4282template<typename DeclT, typename Fn>
4283static void forAllLaterRedecls(DeclT *D, Fn F) {
4284 F(D);
4285
4286 // Check whether we've already merged D into its redeclaration chain.
4287 // MostRecent may or may not be nullptr if D has not been merged. If
4288 // not, walk the merged redecl chain and see if it's there.
4289 auto *MostRecent = D->getMostRecentDecl();
4290 bool Found = false;
4291 for (auto *Redecl = MostRecent; Redecl && !Found;
4292 Redecl = Redecl->getPreviousDecl())
4293 Found = (Redecl == D);
4294
4295 // If this declaration is merged, apply the functor to all later decls.
4296 if (Found) {
4297 for (auto *Redecl = MostRecent; Redecl != D;
4298 Redecl = Redecl->getPreviousDecl())
4299 F(Redecl);
4300 }
4301}
4302
4303void ASTDeclReader::UpdateDecl(Decl *D,
4304 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4305 while (Record.getIdx() < Record.size()) {
4306 switch ((DeclUpdateKind)Record.readInt()) {
4307 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4308 auto *RD = cast<CXXRecordDecl>(D);
4309 // FIXME: If we also have an update record for instantiating the
4310 // definition of D, we need that to happen before we get here.
4311 Decl *MD = Record.readDecl();
4312 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4312, __extension__
__PRETTY_FUNCTION__))
;
4313 // FIXME: We should call addHiddenDecl instead, to add the member
4314 // to its DeclContext.
4315 RD->addedMember(MD);
4316 break;
4317 }
4318
4319 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4320 // It will be added to the template's lazy specialization set.
4321 PendingLazySpecializationIDs.push_back(readDeclID());
4322 break;
4323
4324 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4325 auto *Anon = readDeclAs<NamespaceDecl>();
4326
4327 // Each module has its own anonymous namespace, which is disjoint from
4328 // any other module's anonymous namespaces, so don't attach the anonymous
4329 // namespace at all.
4330 if (!Record.isModule()) {
4331 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4332 TU->setAnonymousNamespace(Anon);
4333 else
4334 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4335 }
4336 break;
4337 }
4338
4339 case UPD_CXX_ADDED_VAR_DEFINITION: {
4340 auto *VD = cast<VarDecl>(D);
4341 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4342 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4343 uint64_t Val = Record.readInt();
4344 if (Val && !VD->getInit()) {
4345 VD->setInit(Record.readExpr());
4346 if (Val != 1) {
4347 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4348 Eval->HasConstantInitialization = (Val & 2) != 0;
4349 Eval->HasConstantDestruction = (Val & 4) != 0;
4350 }
4351 }
4352 break;
4353 }
4354
4355 case UPD_CXX_POINT_OF_INSTANTIATION: {
4356 SourceLocation POI = Record.readSourceLocation();
4357 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4358 VTSD->setPointOfInstantiation(POI);
4359 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4360 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4361 } else {
4362 auto *FD = cast<FunctionDecl>(D);
4363 if (auto *FTSInfo = FD->TemplateOrSpecialization
4364 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4365 FTSInfo->setPointOfInstantiation(POI);
4366 else
4367 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4368 ->setPointOfInstantiation(POI);
4369 }
4370 break;
4371 }
4372
4373 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4374 auto *Param = cast<ParmVarDecl>(D);
4375
4376 // We have to read the default argument regardless of whether we use it
4377 // so that hypothetical further update records aren't messed up.
4378 // TODO: Add a function to skip over the next expr record.
4379 auto *DefaultArg = Record.readExpr();
4380
4381 // Only apply the update if the parameter still has an uninstantiated
4382 // default argument.
4383 if (Param->hasUninstantiatedDefaultArg())
4384 Param->setDefaultArg(DefaultArg);
4385 break;
4386 }
4387
4388 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4389 auto *FD = cast<FieldDecl>(D);
4390 auto *DefaultInit = Record.readExpr();
4391
4392 // Only apply the update if the field still has an uninstantiated
4393 // default member initializer.
4394 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4395 if (DefaultInit)
4396 FD->setInClassInitializer(DefaultInit);
4397 else
4398 // Instantiation failed. We can get here if we serialized an AST for
4399 // an invalid program.
4400 FD->removeInClassInitializer();
4401 }
4402 break;
4403 }
4404
4405 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4406 auto *FD = cast<FunctionDecl>(D);
4407 if (Reader.PendingBodies[FD]) {
4408 // FIXME: Maybe check for ODR violations.
4409 // It's safe to stop now because this update record is always last.
4410 return;
4411 }
4412
4413 if (Record.readInt()) {
4414 // Maintain AST consistency: any later redeclarations of this function
4415 // are inline if this one is. (We might have merged another declaration
4416 // into this one.)
4417 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4418 FD->setImplicitlyInline();
4419 });
4420 }
4421 FD->setInnerLocStart(readSourceLocation());
4422 ReadFunctionDefinition(FD);
4423 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\""
, "clang/lib/Serialization/ASTReaderDecl.cpp", 4423, __extension__
__PRETTY_FUNCTION__))
;
4424 break;
4425 }
4426
4427 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4428 auto *RD = cast<CXXRecordDecl>(D);
4429 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4430 bool HadRealDefinition =
4431 OldDD && (OldDD->Definition != RD ||
4432 !Reader.PendingFakeDefinitionData.count(OldDD));
4433 RD->setParamDestroyedInCallee(Record.readInt());
4434 RD->setArgPassingRestrictions(
4435 (RecordDecl::ArgPassingKind)Record.readInt());
4436 ReadCXXRecordDefinition(RD, /*Update*/true);
4437
4438 // Visible update is handled separately.
4439 uint64_t LexicalOffset = ReadLocalOffset();
4440 if (!HadRealDefinition && LexicalOffset) {
4441 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4442 Reader.PendingFakeDefinitionData.erase(OldDD);
4443 }
4444
4445 auto TSK = (TemplateSpecializationKind)Record.readInt();
4446 SourceLocation POI = readSourceLocation();
4447 if (MemberSpecializationInfo *MSInfo =
4448 RD->getMemberSpecializationInfo()) {
4449 MSInfo->setTemplateSpecializationKind(TSK);
4450 MSInfo->setPointOfInstantiation(POI);
4451 } else {
4452 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4453 Spec->setTemplateSpecializationKind(TSK);
4454 Spec->setPointOfInstantiation(POI);
4455
4456 if (Record.readInt()) {
4457 auto *PartialSpec =
4458 readDeclAs<ClassTemplatePartialSpecializationDecl>();
4459 SmallVector<TemplateArgument, 8> TemplArgs;
4460 Record.readTemplateArgumentList(TemplArgs);
4461 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4462 Reader.getContext(), TemplArgs);
4463
4464 // FIXME: If we already have a partial specialization set,
4465 // check that it matches.
4466 if (!Spec->getSpecializedTemplateOrPartial()
4467 .is<ClassTemplatePartialSpecializationDecl *>())
4468 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4469 }
4470 }
4471
4472 RD->setTagKind((TagTypeKind)Record.readInt());
4473 RD->setLocation(readSourceLocation());
4474 RD->setLocStart(readSourceLocation());
4475 RD->setBraceRange(readSourceRange());
4476
4477 if (Record.readInt()) {
4478 AttrVec Attrs;
4479 Record.readAttributes(Attrs);
4480 // If the declaration already has attributes, we assume that some other
4481 // AST file already loaded them.
4482 if (!D->hasAttrs())
4483 D->setAttrsImpl(Attrs, Reader.getContext());
4484 }
4485 break;
4486 }
4487
4488 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4489 // Set the 'operator delete' directly to avoid emitting another update
4490 // record.
4491 auto *Del = readDeclAs<FunctionDecl>();
4492 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4493 auto *ThisArg = Record.readExpr();
4494 // FIXME: Check consistency if we have an old and new operator delete.
4495 if (!First->OperatorDelete) {
4496 First->OperatorDelete = Del;
4497 First->OperatorDeleteThisArg = ThisArg;
4498 }
4499 break;
4500 }
4501
4502 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4503 SmallVector<QualType, 8> ExceptionStorage;
4504 auto ESI = Record.readExceptionSpecInfo(ExceptionStorage);
4505
4506 // Update this declaration's exception specification, if needed.
4507 auto *FD = cast<FunctionDecl>(D);
4508 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4509 // FIXME: If the exception specification is already present, check that it
4510 // matches.
4511 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4512 FD->setType(Reader.getContext().getFunctionType(
4513 FPT->getReturnType(), FPT->getParamTypes(),
4514 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4515
4516 // When we get to the end of deserializing, see if there are other decls
4517 // that we need to propagate this exception specification onto.
4518 Reader.PendingExceptionSpecUpdates.insert(
4519 std::make_pair(FD->getCanonicalDecl(), FD));
4520 }
4521 break;
4522 }
4523
4524 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4525 auto *FD = cast<FunctionDecl>(D);
4526 QualType DeducedResultType = Record.readType();
4527 Reader.PendingDeducedTypeUpdates.insert(
4528 {FD->getCanonicalDecl(), DeducedResultType});
4529 break;
4530 }
4531
4532 case UPD_DECL_MARKED_USED:
4533 // Maintain AST consistency: any later redeclarations are used too.
4534 D->markUsed(Reader.getContext());
4535 break;
4536
4537 case UPD_MANGLING_NUMBER:
4538 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4539 Record.readInt());
4540 break;
4541
4542 case UPD_STATIC_LOCAL_NUMBER:
4543 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4544 Record.readInt());
4545 break;
4546
4547 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4548 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
4549 Reader.getContext(), readSourceRange(),
4550 AttributeCommonInfo::AS_Pragma));
4551 break;
4552
4553 case UPD_DECL_MARKED_OPENMP_ALLOCATE: {
4554 auto AllocatorKind =
4555 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4556 Expr *Allocator = Record.readExpr();
4557 Expr *Alignment = Record.readExpr();
4558 SourceRange SR = readSourceRange();
4559 D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4560 Reader.getContext(), AllocatorKind, Allocator, Alignment, SR,
4561 AttributeCommonInfo::AS_Pragma));
4562 break;
4563 }
4564
4565 case UPD_DECL_EXPORTED: {
4566 unsigned SubmoduleID = readSubmoduleID();
4567 auto *Exported = cast<NamedDecl>(D);
4568 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4569 Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4570 Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4571 break;
4572 }
4573
4574 case UPD_DECL_MARKED_OPENMP_DECLARETARGET: {
4575 auto MapType = Record.readEnum<OMPDeclareTargetDeclAttr::MapTypeTy>();
4576 auto DevType = Record.readEnum<OMPDeclareTargetDeclAttr::DevTypeTy>();
4577 Expr *IndirectE = Record.readExpr();
4578 bool Indirect = Record.readBool();
4579 unsigned Level = Record.readInt();
4580 D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4581 Reader.getContext(), MapType, DevType, IndirectE, Indirect, Level,
4582 readSourceRange(), AttributeCommonInfo::AS_Pragma));
4583 break;
4584 }
4585
4586 case UPD_ADDED_ATTR_TO_RECORD:
4587 AttrVec Attrs;
4588 Record.readAttributes(Attrs);
4589 assert(Attrs.size() == 1)(static_cast <bool> (Attrs.size() == 1) ? void (0) : __assert_fail
("Attrs.size() == 1", "clang/lib/Serialization/ASTReaderDecl.cpp"
, 4589, __extension__ __PRETTY_FUNCTION__))
;
4590 D->addAttr(Attrs[0]);
4591 break;
4592 }
4593 }
4594}