Bug Summary

File:clang/lib/Serialization/ASTReaderDecl.cpp
Warning:line 474, column 9
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 -disable-llvm-verifier -discard-value-names -main-file-name ASTReaderDecl.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -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 -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-12/lib/clang/12.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/include -I /build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-12/lib/clang/12.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/build-llvm/tools/clang/lib/Serialization -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-09-17-195756-12974-1 -x c++ /build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/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/Attr.h"
18#include "clang/AST/AttrIterator.h"
19#include "clang/AST/Decl.h"
20#include "clang/AST/DeclBase.h"
21#include "clang/AST/DeclCXX.h"
22#include "clang/AST/DeclFriend.h"
23#include "clang/AST/DeclObjC.h"
24#include "clang/AST/DeclOpenMP.h"
25#include "clang/AST/DeclTemplate.h"
26#include "clang/AST/DeclVisitor.h"
27#include "clang/AST/DeclarationName.h"
28#include "clang/AST/Expr.h"
29#include "clang/AST/ExternalASTSource.h"
30#include "clang/AST/LambdaCapture.h"
31#include "clang/AST/NestedNameSpecifier.h"
32#include "clang/AST/OpenMPClause.h"
33#include "clang/AST/Redeclarable.h"
34#include "clang/AST/Stmt.h"
35#include "clang/AST/TemplateBase.h"
36#include "clang/AST/Type.h"
37#include "clang/AST/UnresolvedSet.h"
38#include "clang/Basic/AttrKinds.h"
39#include "clang/Basic/ExceptionSpecificationType.h"
40#include "clang/Basic/IdentifierTable.h"
41#include "clang/Basic/LLVM.h"
42#include "clang/Basic/Lambda.h"
43#include "clang/Basic/LangOptions.h"
44#include "clang/Basic/Linkage.h"
45#include "clang/Basic/Module.h"
46#include "clang/Basic/PragmaKinds.h"
47#include "clang/Basic/SourceLocation.h"
48#include "clang/Basic/Specifiers.h"
49#include "clang/Sema/IdentifierResolver.h"
50#include "clang/Serialization/ASTBitCodes.h"
51#include "clang/Serialization/ASTRecordReader.h"
52#include "clang/Serialization/ContinuousRangeMap.h"
53#include "clang/Serialization/ModuleFile.h"
54#include "llvm/ADT/DenseMap.h"
55#include "llvm/ADT/FoldingSet.h"
56#include "llvm/ADT/STLExtras.h"
57#include "llvm/ADT/SmallPtrSet.h"
58#include "llvm/ADT/SmallVector.h"
59#include "llvm/ADT/iterator_range.h"
60#include "llvm/Bitstream/BitstreamReader.h"
61#include "llvm/Support/Casting.h"
62#include "llvm/Support/ErrorHandling.h"
63#include "llvm/Support/SaveAndRestore.h"
64#include <algorithm>
65#include <cassert>
66#include <cstdint>
67#include <cstring>
68#include <string>
69#include <utility>
70
71using namespace clang;
72using namespace serialization;
73
74//===----------------------------------------------------------------------===//
75// Declaration deserialization
76//===----------------------------------------------------------------------===//
77
78namespace clang {
79
80 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
81 ASTReader &Reader;
82 ASTRecordReader &Record;
83 ASTReader::RecordLocation Loc;
84 const DeclID ThisDeclID;
85 const SourceLocation ThisDeclLoc;
86
87 using RecordData = ASTReader::RecordData;
88
89 TypeID DeferredTypeID = 0;
90 unsigned AnonymousDeclNumber;
91 GlobalDeclID NamedDeclForTagDecl = 0;
92 IdentifierInfo *TypedefNameForLinkage = nullptr;
93
94 bool HasPendingBody = false;
95
96 ///A flag to carry the information for a decl from the entity is
97 /// used. We use it to delay the marking of the canonical decl as used until
98 /// the entire declaration is deserialized and merged.
99 bool IsDeclMarkedUsed = false;
100
101 uint64_t GetCurrentCursorOffset();
102
103 uint64_t ReadLocalOffset() {
104 uint64_t LocalOffset = Record.readInt();
105 assert(LocalOffset < Loc.Offset && "offset point after current record")((LocalOffset < Loc.Offset && "offset point after current record"
) ? static_cast<void> (0) : __assert_fail ("LocalOffset < Loc.Offset && \"offset point after current record\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 105, __PRETTY_FUNCTION__))
;
106 return LocalOffset ? Loc.Offset - LocalOffset : 0;
107 }
108
109 uint64_t ReadGlobalOffset() {
110 uint64_t Local = ReadLocalOffset();
111 return Local ? Record.getGlobalBitOffset(Local) : 0;
112 }
113
114 SourceLocation readSourceLocation() {
115 return Record.readSourceLocation();
116 }
117
118 SourceRange readSourceRange() {
119 return Record.readSourceRange();
120 }
121
122 TypeSourceInfo *readTypeSourceInfo() {
123 return Record.readTypeSourceInfo();
124 }
125
126 serialization::DeclID readDeclID() {
127 return Record.readDeclID();
128 }
129
130 std::string readString() {
131 return Record.readString();
132 }
133
134 void readDeclIDList(SmallVectorImpl<DeclID> &IDs) {
135 for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
136 IDs.push_back(readDeclID());
137 }
138
139 Decl *readDecl() {
140 return Record.readDecl();
141 }
142
143 template<typename T>
144 T *readDeclAs() {
145 return Record.readDeclAs<T>();
146 }
147
148 serialization::SubmoduleID readSubmoduleID() {
149 if (Record.getIdx() == Record.size())
150 return 0;
151
152 return Record.getGlobalSubmoduleID(Record.readInt());
153 }
154
155 Module *readModule() {
156 return Record.getSubmodule(readSubmoduleID());
157 }
158
159 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
160 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
161 const CXXRecordDecl *D);
162 void MergeDefinitionData(CXXRecordDecl *D,
163 struct CXXRecordDecl::DefinitionData &&NewDD);
164 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
165 void MergeDefinitionData(ObjCInterfaceDecl *D,
166 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
167 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
168 void MergeDefinitionData(ObjCProtocolDecl *D,
169 struct ObjCProtocolDecl::DefinitionData &&NewDD);
170
171 static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
172
173 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
174 DeclContext *DC,
175 unsigned Index);
176 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
177 unsigned Index, NamedDecl *D);
178
179 /// Results from loading a RedeclarableDecl.
180 class RedeclarableResult {
181 Decl *MergeWith;
182 GlobalDeclID FirstID;
183 bool IsKeyDecl;
184
185 public:
186 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
187 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
188
189 /// Retrieve the first ID.
190 GlobalDeclID getFirstID() const { return FirstID; }
191
192 /// Is this declaration a key declaration?
193 bool isKeyDecl() const { return IsKeyDecl; }
194
195 /// Get a known declaration that this should be merged with, if
196 /// any.
197 Decl *getKnownMergeTarget() const { return MergeWith; }
198 };
199
200 /// Class used to capture the result of searching for an existing
201 /// declaration of a specific kind and name, along with the ability
202 /// to update the place where this result was found (the declaration
203 /// chain hanging off an identifier or the DeclContext we searched in)
204 /// if requested.
205 class FindExistingResult {
206 ASTReader &Reader;
207 NamedDecl *New = nullptr;
208 NamedDecl *Existing = nullptr;
209 bool AddResult = false;
210 unsigned AnonymousDeclNumber = 0;
211 IdentifierInfo *TypedefNameForLinkage = nullptr;
212
213 public:
214 FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
215
216 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
217 unsigned AnonymousDeclNumber,
218 IdentifierInfo *TypedefNameForLinkage)
219 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
220 AnonymousDeclNumber(AnonymousDeclNumber),
221 TypedefNameForLinkage(TypedefNameForLinkage) {}
222
223 FindExistingResult(FindExistingResult &&Other)
224 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
225 AddResult(Other.AddResult),
226 AnonymousDeclNumber(Other.AnonymousDeclNumber),
227 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
228 Other.AddResult = false;
229 }
230
231 FindExistingResult &operator=(FindExistingResult &&) = delete;
232 ~FindExistingResult();
233
234 /// Suppress the addition of this result into the known set of
235 /// names.
236 void suppress() { AddResult = false; }
237
238 operator NamedDecl*() const { return Existing; }
239
240 template<typename T>
241 operator T*() const { return dyn_cast_or_null<T>(Existing); }
242 };
243
244 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
245 DeclContext *DC);
246 FindExistingResult findExisting(NamedDecl *D);
247
248 public:
249 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
250 ASTReader::RecordLocation Loc,
251 DeclID thisDeclID, SourceLocation ThisDeclLoc)
252 : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
253 ThisDeclLoc(ThisDeclLoc) {}
254
255 template <typename T> static
256 void AddLazySpecializations(T *D,
257 SmallVectorImpl<serialization::DeclID>& IDs) {
258 if (IDs.empty())
259 return;
260
261 // FIXME: We should avoid this pattern of getting the ASTContext.
262 ASTContext &C = D->getASTContext();
263
264 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
265
266 if (auto &Old = LazySpecializations) {
267 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
268 llvm::sort(IDs);
269 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
270 }
271
272 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
273 *Result = IDs.size();
274 std::copy(IDs.begin(), IDs.end(), Result + 1);
275
276 LazySpecializations = Result;
277 }
278
279 template <typename DeclT>
280 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
281 static Decl *getMostRecentDeclImpl(...);
282 static Decl *getMostRecentDecl(Decl *D);
283
284 static void mergeInheritableAttributes(ASTReader &Reader, Decl *D,
285 Decl *Previous);
286
287 template <typename DeclT>
288 static void attachPreviousDeclImpl(ASTReader &Reader,
289 Redeclarable<DeclT> *D, Decl *Previous,
290 Decl *Canon);
291 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
292 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
293 Decl *Canon);
294
295 template <typename DeclT>
296 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
297 static void attachLatestDeclImpl(...);
298 static void attachLatestDecl(Decl *D, Decl *latest);
299
300 template <typename DeclT>
301 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
302 static void markIncompleteDeclChainImpl(...);
303
304 /// Determine whether this declaration has a pending body.
305 bool hasPendingBody() const { return HasPendingBody; }
306
307 void ReadFunctionDefinition(FunctionDecl *FD);
308 void Visit(Decl *D);
309
310 void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
311
312 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
313 ObjCCategoryDecl *Next) {
314 Cat->NextClassCategory = Next;
315 }
316
317 void VisitDecl(Decl *D);
318 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
319 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
320 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
321 void VisitNamedDecl(NamedDecl *ND);
322 void VisitLabelDecl(LabelDecl *LD);
323 void VisitNamespaceDecl(NamespaceDecl *D);
324 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
325 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
326 void VisitTypeDecl(TypeDecl *TD);
327 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
328 void VisitTypedefDecl(TypedefDecl *TD);
329 void VisitTypeAliasDecl(TypeAliasDecl *TD);
330 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
331 RedeclarableResult VisitTagDecl(TagDecl *TD);
332 void VisitEnumDecl(EnumDecl *ED);
333 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
334 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
335 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
336 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
337 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
338 ClassTemplateSpecializationDecl *D);
339
340 void VisitClassTemplateSpecializationDecl(
341 ClassTemplateSpecializationDecl *D) {
342 VisitClassTemplateSpecializationDeclImpl(D);
343 }
344
345 void VisitClassTemplatePartialSpecializationDecl(
346 ClassTemplatePartialSpecializationDecl *D);
347 void VisitClassScopeFunctionSpecializationDecl(
348 ClassScopeFunctionSpecializationDecl *D);
349 RedeclarableResult
350 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
351
352 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
353 VisitVarTemplateSpecializationDeclImpl(D);
354 }
355
356 void VisitVarTemplatePartialSpecializationDecl(
357 VarTemplatePartialSpecializationDecl *D);
358 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
359 void VisitValueDecl(ValueDecl *VD);
360 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
361 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
362 void VisitDeclaratorDecl(DeclaratorDecl *DD);
363 void VisitFunctionDecl(FunctionDecl *FD);
364 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
365 void VisitCXXMethodDecl(CXXMethodDecl *D);
366 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
367 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
368 void VisitCXXConversionDecl(CXXConversionDecl *D);
369 void VisitFieldDecl(FieldDecl *FD);
370 void VisitMSPropertyDecl(MSPropertyDecl *FD);
371 void VisitMSGuidDecl(MSGuidDecl *D);
372 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
373 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
374 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
375 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
376 void VisitParmVarDecl(ParmVarDecl *PD);
377 void VisitDecompositionDecl(DecompositionDecl *DD);
378 void VisitBindingDecl(BindingDecl *BD);
379 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
380 DeclID VisitTemplateDecl(TemplateDecl *D);
381 void VisitConceptDecl(ConceptDecl *D);
382 void VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D);
383 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
384 void VisitClassTemplateDecl(ClassTemplateDecl *D);
385 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
386 void VisitVarTemplateDecl(VarTemplateDecl *D);
387 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
388 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
389 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
390 void VisitUsingDecl(UsingDecl *D);
391 void VisitUsingPackDecl(UsingPackDecl *D);
392 void VisitUsingShadowDecl(UsingShadowDecl *D);
393 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
394 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
395 void VisitExportDecl(ExportDecl *D);
396 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
397 void VisitImportDecl(ImportDecl *D);
398 void VisitAccessSpecDecl(AccessSpecDecl *D);
399 void VisitFriendDecl(FriendDecl *D);
400 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
401 void VisitStaticAssertDecl(StaticAssertDecl *D);
402 void VisitBlockDecl(BlockDecl *BD);
403 void VisitCapturedDecl(CapturedDecl *CD);
404 void VisitEmptyDecl(EmptyDecl *D);
405 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
406
407 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
408
409 template<typename T>
410 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
411
412 template<typename T>
413 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
414 DeclID TemplatePatternID = 0);
415
416 template<typename T>
417 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
418 RedeclarableResult &Redecl,
419 DeclID TemplatePatternID = 0);
420
421 template<typename T>
422 void mergeMergeable(Mergeable<T> *D);
423
424 void mergeMergeable(LifetimeExtendedTemporaryDecl *D);
425
426 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
427 RedeclarableTemplateDecl *Existing,
428 DeclID DsID, bool IsKeyDecl);
429
430 ObjCTypeParamList *ReadObjCTypeParamList();
431
432 // FIXME: Reorder according to DeclNodes.td?
433 void VisitObjCMethodDecl(ObjCMethodDecl *D);
434 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
435 void VisitObjCContainerDecl(ObjCContainerDecl *D);
436 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
437 void VisitObjCIvarDecl(ObjCIvarDecl *D);
438 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
439 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
440 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
441 void VisitObjCImplDecl(ObjCImplDecl *D);
442 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
443 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
444 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
445 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
446 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
447 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
448 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
449 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
450 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
451 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
452 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
453 };
454
455} // namespace clang
456
457namespace {
458
459/// Iterator over the redeclarations of a declaration that have already
460/// been merged into the same redeclaration chain.
461template<typename DeclT>
462class MergedRedeclIterator {
463 DeclT *Start;
464 DeclT *Canonical = nullptr;
465 DeclT *Current = nullptr;
466
467public:
468 MergedRedeclIterator() = default;
469 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
470
471 DeclT *operator*() { return Current; }
472
473 MergedRedeclIterator &operator++() {
474 if (Current->isFirstDecl()) {
24
Taking false branch
33
Called C++ object pointer is null
475 Canonical = Current;
476 Current = Current->getMostRecentDecl();
477 } else
478 Current = Current->getPreviousDecl();
479
480 // If we started in the merged portion, we'll reach our start position
481 // eventually. Otherwise, we'll never reach it, but the second declaration
482 // we reached was the canonical declaration, so stop when we see that one
483 // again.
484 if (Current == Start || Current == Canonical)
25
Assuming field 'Current' is equal to field 'Start'
485 Current = nullptr;
26
Null pointer value stored to '__begin1.Current'
486 return *this;
487 }
488
489 friend bool operator!=(const MergedRedeclIterator &A,
490 const MergedRedeclIterator &B) {
491 return A.Current != B.Current;
492 }
493};
494
495} // namespace
496
497template <typename DeclT>
498static llvm::iterator_range<MergedRedeclIterator<DeclT>>
499merged_redecls(DeclT *D) {
500 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
501 MergedRedeclIterator<DeclT>());
502}
503
504uint64_t ASTDeclReader::GetCurrentCursorOffset() {
505 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
506}
507
508void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
509 if (Record.readInt()) {
510 Reader.DefinitionSource[FD] =
511 Loc.F->Kind == ModuleKind::MK_MainFile ||
512 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
513 }
514 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
515 CD->setNumCtorInitializers(Record.readInt());
516 if (CD->getNumCtorInitializers())
517 CD->CtorInitializers = ReadGlobalOffset();
518 }
519 // Store the offset of the body so we can lazily load it later.
520 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
521 HasPendingBody = true;
522}
523
524void ASTDeclReader::Visit(Decl *D) {
525 DeclVisitor<ASTDeclReader, void>::Visit(D);
526
527 // At this point we have deserialized and merged the decl and it is safe to
528 // update its canonical decl to signal that the entire entity is used.
529 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
530 IsDeclMarkedUsed = false;
531
532 if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
533 if (auto *TInfo = DD->getTypeSourceInfo())
534 Record.readTypeLoc(TInfo->getTypeLoc());
535 }
536
537 if (auto *TD = dyn_cast<TypeDecl>(D)) {
538 // We have a fully initialized TypeDecl. Read its type now.
539 TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
540
541 // If this is a tag declaration with a typedef name for linkage, it's safe
542 // to load that typedef now.
543 if (NamedDeclForTagDecl)
544 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
545 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
546 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
547 // if we have a fully initialized TypeDecl, we can safely read its type now.
548 ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
549 } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
550 // FunctionDecl's body was written last after all other Stmts/Exprs.
551 // We only read it if FD doesn't already have a body (e.g., from another
552 // module).
553 // FIXME: Can we diagnose ODR violations somehow?
554 if (Record.readInt())
555 ReadFunctionDefinition(FD);
556 }
557}
558
559void ASTDeclReader::VisitDecl(Decl *D) {
560 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
561 isa<ParmVarDecl>(D) || isa<ObjCTypeParamDecl>(D)) {
562 // We don't want to deserialize the DeclContext of a template
563 // parameter or of a parameter of a function template immediately. These
564 // entities might be used in the formulation of its DeclContext (for
565 // example, a function parameter can be used in decltype() in trailing
566 // return type of the function). Use the translation unit DeclContext as a
567 // placeholder.
568 GlobalDeclID SemaDCIDForTemplateParmDecl = readDeclID();
569 GlobalDeclID LexicalDCIDForTemplateParmDecl = readDeclID();
570 if (!LexicalDCIDForTemplateParmDecl)
571 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
572 Reader.addPendingDeclContextInfo(D,
573 SemaDCIDForTemplateParmDecl,
574 LexicalDCIDForTemplateParmDecl);
575 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
576 } else {
577 auto *SemaDC = readDeclAs<DeclContext>();
578 auto *LexicalDC = readDeclAs<DeclContext>();
579 if (!LexicalDC)
580 LexicalDC = SemaDC;
581 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
582 // Avoid calling setLexicalDeclContext() directly because it uses
583 // Decl::getASTContext() internally which is unsafe during derialization.
584 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
585 Reader.getContext());
586 }
587 D->setLocation(ThisDeclLoc);
588 D->InvalidDecl = Record.readInt();
589 if (Record.readInt()) { // hasAttrs
590 AttrVec Attrs;
591 Record.readAttributes(Attrs);
592 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
593 // internally which is unsafe during derialization.
594 D->setAttrsImpl(Attrs, Reader.getContext());
595 }
596 D->setImplicit(Record.readInt());
597 D->Used = Record.readInt();
598 IsDeclMarkedUsed |= D->Used;
599 D->setReferenced(Record.readInt());
600 D->setTopLevelDeclInObjCContainer(Record.readInt());
601 D->setAccess((AccessSpecifier)Record.readInt());
602 D->FromASTFile = true;
603 bool ModulePrivate = Record.readInt();
604
605 // Determine whether this declaration is part of a (sub)module. If so, it
606 // may not yet be visible.
607 if (unsigned SubmoduleID = readSubmoduleID()) {
608 // Store the owning submodule ID in the declaration.
609 D->setModuleOwnershipKind(
610 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
611 : Decl::ModuleOwnershipKind::VisibleWhenImported);
612 D->setOwningModuleID(SubmoduleID);
613
614 if (ModulePrivate) {
615 // Module-private declarations are never visible, so there is no work to
616 // do.
617 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
618 // If local visibility is being tracked, this declaration will become
619 // hidden and visible as the owning module does.
620 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
621 // Mark the declaration as visible when its owning module becomes visible.
622 if (Owner->NameVisibility == Module::AllVisible)
623 D->setVisibleDespiteOwningModule();
624 else
625 Reader.HiddenNamesMap[Owner].push_back(D);
626 }
627 } else if (ModulePrivate) {
628 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
629 }
630}
631
632void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
633 VisitDecl(D);
634 D->setLocation(readSourceLocation());
635 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
636 std::string Arg = readString();
637 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
638 D->getTrailingObjects<char>()[Arg.size()] = '\0';
639}
640
641void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
642 VisitDecl(D);
643 D->setLocation(readSourceLocation());
644 std::string Name = readString();
645 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
646 D->getTrailingObjects<char>()[Name.size()] = '\0';
647
648 D->ValueStart = Name.size() + 1;
649 std::string Value = readString();
650 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
651 Value.size());
652 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
653}
654
655void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
656 llvm_unreachable("Translation units are not serialized")::llvm::llvm_unreachable_internal("Translation units are not serialized"
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 656)
;
657}
658
659void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
660 VisitDecl(ND);
661 ND->setDeclName(Record.readDeclarationName());
662 AnonymousDeclNumber = Record.readInt();
663}
664
665void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
666 VisitNamedDecl(TD);
667 TD->setLocStart(readSourceLocation());
668 // Delay type reading until after we have fully initialized the decl.
669 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
670}
671
672ASTDeclReader::RedeclarableResult
673ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
674 RedeclarableResult Redecl = VisitRedeclarable(TD);
675 VisitTypeDecl(TD);
676 TypeSourceInfo *TInfo = readTypeSourceInfo();
677 if (Record.readInt()) { // isModed
678 QualType modedT = Record.readType();
679 TD->setModedTypeSourceInfo(TInfo, modedT);
680 } else
681 TD->setTypeSourceInfo(TInfo);
682 // Read and discard the declaration for which this is a typedef name for
683 // linkage, if it exists. We cannot rely on our type to pull in this decl,
684 // because it might have been merged with a type from another module and
685 // thus might not refer to our version of the declaration.
686 readDecl();
687 return Redecl;
688}
689
690void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
691 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
692 mergeRedeclarable(TD, Redecl);
693}
694
695void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
696 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
697 if (auto *Template = readDeclAs<TypeAliasTemplateDecl>())
698 // Merged when we merge the template.
699 TD->setDescribedAliasTemplate(Template);
700 else
701 mergeRedeclarable(TD, Redecl);
702}
703
704ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
705 RedeclarableResult Redecl = VisitRedeclarable(TD);
706 VisitTypeDecl(TD);
707
708 TD->IdentifierNamespace = Record.readInt();
709 TD->setTagKind((TagDecl::TagKind)Record.readInt());
710 if (!isa<CXXRecordDecl>(TD))
711 TD->setCompleteDefinition(Record.readInt());
712 TD->setEmbeddedInDeclarator(Record.readInt());
713 TD->setFreeStanding(Record.readInt());
714 TD->setCompleteDefinitionRequired(Record.readInt());
715 TD->setBraceRange(readSourceRange());
716
717 switch (Record.readInt()) {
718 case 0:
719 break;
720 case 1: { // ExtInfo
721 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
722 Record.readQualifierInfo(*Info);
723 TD->TypedefNameDeclOrQualifier = Info;
724 break;
725 }
726 case 2: // TypedefNameForAnonDecl
727 NamedDeclForTagDecl = readDeclID();
728 TypedefNameForLinkage = Record.readIdentifier();
729 break;
730 default:
731 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 731)
;
732 }
733
734 if (!isa<CXXRecordDecl>(TD))
735 mergeRedeclarable(TD, Redecl);
736 return Redecl;
737}
738
739void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
740 VisitTagDecl(ED);
741 if (TypeSourceInfo *TI = readTypeSourceInfo())
742 ED->setIntegerTypeSourceInfo(TI);
743 else
744 ED->setIntegerType(Record.readType());
745 ED->setPromotionType(Record.readType());
746 ED->setNumPositiveBits(Record.readInt());
747 ED->setNumNegativeBits(Record.readInt());
748 ED->setScoped(Record.readInt());
749 ED->setScopedUsingClassTag(Record.readInt());
750 ED->setFixed(Record.readInt());
751
752 ED->setHasODRHash(true);
753 ED->ODRHash = Record.readInt();
754
755 // If this is a definition subject to the ODR, and we already have a
756 // definition, merge this one into it.
757 if (ED->isCompleteDefinition() &&
758 Reader.getContext().getLangOpts().Modules &&
759 Reader.getContext().getLangOpts().CPlusPlus) {
760 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
761 if (!OldDef) {
762 // This is the first time we've seen an imported definition. Look for a
763 // local definition before deciding that we are the first definition.
764 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
765 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
766 OldDef = D;
767 break;
768 }
769 }
770 }
771 if (OldDef) {
772 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
773 ED->setCompleteDefinition(false);
774 Reader.mergeDefinitionVisibility(OldDef, ED);
775 if (OldDef->getODRHash() != ED->getODRHash())
776 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
777 } else {
778 OldDef = ED;
779 }
780 }
781
782 if (auto *InstED = readDeclAs<EnumDecl>()) {
783 auto TSK = (TemplateSpecializationKind)Record.readInt();
784 SourceLocation POI = readSourceLocation();
785 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
786 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
787 }
788}
789
790ASTDeclReader::RedeclarableResult
791ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
792 RedeclarableResult Redecl = VisitTagDecl(RD);
793 RD->setHasFlexibleArrayMember(Record.readInt());
794 RD->setAnonymousStructOrUnion(Record.readInt());
795 RD->setHasObjectMember(Record.readInt());
796 RD->setHasVolatileMember(Record.readInt());
797 RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
798 RD->setNonTrivialToPrimitiveCopy(Record.readInt());
799 RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
800 RD->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(Record.readInt());
801 RD->setHasNonTrivialToPrimitiveDestructCUnion(Record.readInt());
802 RD->setHasNonTrivialToPrimitiveCopyCUnion(Record.readInt());
803 RD->setParamDestroyedInCallee(Record.readInt());
804 RD->setArgPassingRestrictions((RecordDecl::ArgPassingKind)Record.readInt());
805 return Redecl;
806}
807
808void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
809 VisitNamedDecl(VD);
810 // For function declarations, defer reading the type in case the function has
811 // a deduced return type that references an entity declared within the
812 // function.
813 if (isa<FunctionDecl>(VD))
814 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
815 else
816 VD->setType(Record.readType());
817}
818
819void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
820 VisitValueDecl(ECD);
821 if (Record.readInt())
822 ECD->setInitExpr(Record.readExpr());
823 ECD->setInitVal(Record.readAPSInt());
824 mergeMergeable(ECD);
825}
826
827void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
828 VisitValueDecl(DD);
829 DD->setInnerLocStart(readSourceLocation());
830 if (Record.readInt()) { // hasExtInfo
831 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
832 Record.readQualifierInfo(*Info);
833 Info->TrailingRequiresClause = Record.readExpr();
834 DD->DeclInfo = Info;
835 }
836 QualType TSIType = Record.readType();
837 DD->setTypeSourceInfo(
838 TSIType.isNull() ? nullptr
839 : Reader.getContext().CreateTypeSourceInfo(TSIType));
840}
841
842void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
843 RedeclarableResult Redecl = VisitRedeclarable(FD);
844 VisitDeclaratorDecl(FD);
845
846 // Attach a type to this function. Use the real type if possible, but fall
847 // back to the type as written if it involves a deduced return type.
848 if (FD->getTypeSourceInfo() &&
849 FD->getTypeSourceInfo()->getType()->castAs<FunctionType>()
850 ->getReturnType()->getContainedAutoType()) {
851 // We'll set up the real type in Visit, once we've finished loading the
852 // function.
853 FD->setType(FD->getTypeSourceInfo()->getType());
854 Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
855 } else {
856 FD->setType(Reader.GetType(DeferredTypeID));
857 }
858 DeferredTypeID = 0;
859
860 FD->DNLoc = Record.readDeclarationNameLoc(FD->getDeclName());
861 FD->IdentifierNamespace = Record.readInt();
862
863 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
864 // after everything else is read.
865
866 FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
867 FD->setInlineSpecified(Record.readInt());
868 FD->setImplicitlyInline(Record.readInt());
869 FD->setVirtualAsWritten(Record.readInt());
870 FD->setPure(Record.readInt());
871 FD->setHasInheritedPrototype(Record.readInt());
872 FD->setHasWrittenPrototype(Record.readInt());
873 FD->setDeletedAsWritten(Record.readInt());
874 FD->setTrivial(Record.readInt());
875 FD->setTrivialForCall(Record.readInt());
876 FD->setDefaulted(Record.readInt());
877 FD->setExplicitlyDefaulted(Record.readInt());
878 FD->setHasImplicitReturnZero(Record.readInt());
879 FD->setConstexprKind(static_cast<ConstexprSpecKind>(Record.readInt()));
880 FD->setUsesSEHTry(Record.readInt());
881 FD->setHasSkippedBody(Record.readInt());
882 FD->setIsMultiVersion(Record.readInt());
883 FD->setLateTemplateParsed(Record.readInt());
884
885 FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
886 FD->EndRangeLoc = readSourceLocation();
887
888 FD->ODRHash = Record.readInt();
889 FD->setHasODRHash(true);
890 FD->setUsesFPIntrin(Record.readInt());
891
892 if (FD->isDefaulted()) {
893 if (unsigned NumLookups = Record.readInt()) {
894 SmallVector<DeclAccessPair, 8> Lookups;
895 for (unsigned I = 0; I != NumLookups; ++I) {
896 NamedDecl *ND = Record.readDeclAs<NamedDecl>();
897 AccessSpecifier AS = (AccessSpecifier)Record.readInt();
898 Lookups.push_back(DeclAccessPair::make(ND, AS));
899 }
900 FD->setDefaultedFunctionInfo(FunctionDecl::DefaultedFunctionInfo::Create(
901 Reader.getContext(), Lookups));
902 }
903 }
904
905 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
906 case FunctionDecl::TK_NonTemplate:
907 mergeRedeclarable(FD, Redecl);
908 break;
909 case FunctionDecl::TK_FunctionTemplate:
910 // Merged when we merge the template.
911 FD->setDescribedFunctionTemplate(readDeclAs<FunctionTemplateDecl>());
912 break;
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 mergeRedeclarable(FD, Redecl);
920 break;
921 }
922 case FunctionDecl::TK_FunctionTemplateSpecialization: {
923 auto *Template = readDeclAs<FunctionTemplateDecl>();
924 auto TSK = (TemplateSpecializationKind)Record.readInt();
925
926 // Template arguments.
927 SmallVector<TemplateArgument, 8> TemplArgs;
928 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
929
930 // Template args as written.
931 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
932 SourceLocation LAngleLoc, RAngleLoc;
933 bool HasTemplateArgumentsAsWritten = Record.readInt();
934 if (HasTemplateArgumentsAsWritten) {
935 unsigned NumTemplateArgLocs = Record.readInt();
936 TemplArgLocs.reserve(NumTemplateArgLocs);
937 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
938 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
939
940 LAngleLoc = readSourceLocation();
941 RAngleLoc = readSourceLocation();
942 }
943
944 SourceLocation POI = readSourceLocation();
945
946 ASTContext &C = Reader.getContext();
947 TemplateArgumentList *TemplArgList
948 = TemplateArgumentList::CreateCopy(C, TemplArgs);
949 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
950 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
951 TemplArgsInfo.addArgument(TemplArgLocs[i]);
952
953 MemberSpecializationInfo *MSInfo = nullptr;
954 if (Record.readInt()) {
955 auto *FD = readDeclAs<FunctionDecl>();
956 auto TSK = (TemplateSpecializationKind)Record.readInt();
957 SourceLocation POI = readSourceLocation();
958
959 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
960 MSInfo->setPointOfInstantiation(POI);
961 }
962
963 FunctionTemplateSpecializationInfo *FTInfo =
964 FunctionTemplateSpecializationInfo::Create(
965 C, FD, Template, TSK, TemplArgList,
966 HasTemplateArgumentsAsWritten ? &TemplArgsInfo : nullptr, POI,
967 MSInfo);
968 FD->TemplateOrSpecialization = FTInfo;
969
970 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
971 // The template that contains the specializations set. It's not safe to
972 // use getCanonicalDecl on Template since it may still be initializing.
973 auto *CanonTemplate = readDeclAs<FunctionTemplateDecl>();
974 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
975 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
976 // FunctionTemplateSpecializationInfo's Profile().
977 // We avoid getASTContext because a decl in the parent hierarchy may
978 // be initializing.
979 llvm::FoldingSetNodeID ID;
980 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
981 void *InsertPos = nullptr;
982 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
983 FunctionTemplateSpecializationInfo *ExistingInfo =
984 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
985 if (InsertPos)
986 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
987 else {
988 assert(Reader.getContext().getLangOpts().Modules &&((Reader.getContext().getLangOpts().Modules && "already deserialized this template specialization"
) ? static_cast<void> (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 989, __PRETTY_FUNCTION__))
989 "already deserialized this template specialization")((Reader.getContext().getLangOpts().Modules && "already deserialized this template specialization"
) ? static_cast<void> (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 989, __PRETTY_FUNCTION__))
;
990 mergeRedeclarable(FD, ExistingInfo->getFunction(), Redecl);
991 }
992 }
993 break;
994 }
995 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
996 // Templates.
997 UnresolvedSet<8> TemplDecls;
998 unsigned NumTemplates = Record.readInt();
999 while (NumTemplates--)
1000 TemplDecls.addDecl(readDeclAs<NamedDecl>());
1001
1002 // Templates args.
1003 TemplateArgumentListInfo TemplArgs;
1004 unsigned NumArgs = Record.readInt();
1005 while (NumArgs--)
1006 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
1007 TemplArgs.setLAngleLoc(readSourceLocation());
1008 TemplArgs.setRAngleLoc(readSourceLocation());
1009
1010 FD->setDependentTemplateSpecialization(Reader.getContext(),
1011 TemplDecls, TemplArgs);
1012 // These are not merged; we don't need to merge redeclarations of dependent
1013 // template friends.
1014 break;
1015 }
1016 }
1017
1018 // Read in the parameters.
1019 unsigned NumParams = Record.readInt();
1020 SmallVector<ParmVarDecl *, 16> Params;
1021 Params.reserve(NumParams);
1022 for (unsigned I = 0; I != NumParams; ++I)
1023 Params.push_back(readDeclAs<ParmVarDecl>());
1024 FD->setParams(Reader.getContext(), Params);
1025}
1026
1027void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
1028 VisitNamedDecl(MD);
1029 if (Record.readInt()) {
1030 // Load the body on-demand. Most clients won't care, because method
1031 // definitions rarely show up in headers.
1032 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1033 HasPendingBody = true;
1034 }
1035 MD->setSelfDecl(readDeclAs<ImplicitParamDecl>());
1036 MD->setCmdDecl(readDeclAs<ImplicitParamDecl>());
1037 MD->setInstanceMethod(Record.readInt());
1038 MD->setVariadic(Record.readInt());
1039 MD->setPropertyAccessor(Record.readInt());
1040 MD->setSynthesizedAccessorStub(Record.readInt());
1041 MD->setDefined(Record.readInt());
1042 MD->setOverriding(Record.readInt());
1043 MD->setHasSkippedBody(Record.readInt());
1044
1045 MD->setIsRedeclaration(Record.readInt());
1046 MD->setHasRedeclaration(Record.readInt());
1047 if (MD->hasRedeclaration())
1048 Reader.getContext().setObjCMethodRedeclaration(MD,
1049 readDeclAs<ObjCMethodDecl>());
1050
1051 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1052 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1053 MD->setRelatedResultType(Record.readInt());
1054 MD->setReturnType(Record.readType());
1055 MD->setReturnTypeSourceInfo(readTypeSourceInfo());
1056 MD->DeclEndLoc = readSourceLocation();
1057 unsigned NumParams = Record.readInt();
1058 SmallVector<ParmVarDecl *, 16> Params;
1059 Params.reserve(NumParams);
1060 for (unsigned I = 0; I != NumParams; ++I)
1061 Params.push_back(readDeclAs<ParmVarDecl>());
1062
1063 MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1064 unsigned NumStoredSelLocs = Record.readInt();
1065 SmallVector<SourceLocation, 16> SelLocs;
1066 SelLocs.reserve(NumStoredSelLocs);
1067 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1068 SelLocs.push_back(readSourceLocation());
1069
1070 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1071}
1072
1073void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1074 VisitTypedefNameDecl(D);
1075
1076 D->Variance = Record.readInt();
1077 D->Index = Record.readInt();
1078 D->VarianceLoc = readSourceLocation();
1079 D->ColonLoc = readSourceLocation();
1080}
1081
1082void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1083 VisitNamedDecl(CD);
1084 CD->setAtStartLoc(readSourceLocation());
1085 CD->setAtEndRange(readSourceRange());
1086}
1087
1088ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1089 unsigned numParams = Record.readInt();
1090 if (numParams == 0)
1091 return nullptr;
1092
1093 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1094 typeParams.reserve(numParams);
1095 for (unsigned i = 0; i != numParams; ++i) {
1096 auto *typeParam = readDeclAs<ObjCTypeParamDecl>();
1097 if (!typeParam)
1098 return nullptr;
1099
1100 typeParams.push_back(typeParam);
1101 }
1102
1103 SourceLocation lAngleLoc = readSourceLocation();
1104 SourceLocation rAngleLoc = readSourceLocation();
1105
1106 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1107 typeParams, rAngleLoc);
1108}
1109
1110void ASTDeclReader::ReadObjCDefinitionData(
1111 struct ObjCInterfaceDecl::DefinitionData &Data) {
1112 // Read the superclass.
1113 Data.SuperClassTInfo = readTypeSourceInfo();
1114
1115 Data.EndLoc = readSourceLocation();
1116 Data.HasDesignatedInitializers = Record.readInt();
1117
1118 // Read the directly referenced protocols and their SourceLocations.
1119 unsigned NumProtocols = Record.readInt();
1120 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1121 Protocols.reserve(NumProtocols);
1122 for (unsigned I = 0; I != NumProtocols; ++I)
1123 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1124 SmallVector<SourceLocation, 16> ProtoLocs;
1125 ProtoLocs.reserve(NumProtocols);
1126 for (unsigned I = 0; I != NumProtocols; ++I)
1127 ProtoLocs.push_back(readSourceLocation());
1128 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1129 Reader.getContext());
1130
1131 // Read the transitive closure of protocols referenced by this class.
1132 NumProtocols = Record.readInt();
1133 Protocols.clear();
1134 Protocols.reserve(NumProtocols);
1135 for (unsigned I = 0; I != NumProtocols; ++I)
1136 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1137 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1138 Reader.getContext());
1139}
1140
1141void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1142 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1143 // FIXME: odr checking?
1144}
1145
1146void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1147 RedeclarableResult Redecl = VisitRedeclarable(ID);
1148 VisitObjCContainerDecl(ID);
1149 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1150 mergeRedeclarable(ID, Redecl);
1151
1152 ID->TypeParamList = ReadObjCTypeParamList();
1153 if (Record.readInt()) {
1154 // Read the definition.
1155 ID->allocateDefinitionData();
1156
1157 ReadObjCDefinitionData(ID->data());
1158 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1159 if (Canon->Data.getPointer()) {
1160 // If we already have a definition, keep the definition invariant and
1161 // merge the data.
1162 MergeDefinitionData(Canon, std::move(ID->data()));
1163 ID->Data = Canon->Data;
1164 } else {
1165 // Set the definition data of the canonical declaration, so other
1166 // redeclarations will see it.
1167 ID->getCanonicalDecl()->Data = ID->Data;
1168
1169 // We will rebuild this list lazily.
1170 ID->setIvarList(nullptr);
1171 }
1172
1173 // Note that we have deserialized a definition.
1174 Reader.PendingDefinitions.insert(ID);
1175
1176 // Note that we've loaded this Objective-C class.
1177 Reader.ObjCClassesLoaded.push_back(ID);
1178 } else {
1179 ID->Data = ID->getCanonicalDecl()->Data;
1180 }
1181}
1182
1183void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1184 VisitFieldDecl(IVD);
1185 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1186 // This field will be built lazily.
1187 IVD->setNextIvar(nullptr);
1188 bool synth = Record.readInt();
1189 IVD->setSynthesize(synth);
1190}
1191
1192void ASTDeclReader::ReadObjCDefinitionData(
1193 struct ObjCProtocolDecl::DefinitionData &Data) {
1194 unsigned NumProtoRefs = Record.readInt();
1195 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1196 ProtoRefs.reserve(NumProtoRefs);
1197 for (unsigned I = 0; I != NumProtoRefs; ++I)
1198 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1199 SmallVector<SourceLocation, 16> ProtoLocs;
1200 ProtoLocs.reserve(NumProtoRefs);
1201 for (unsigned I = 0; I != NumProtoRefs; ++I)
1202 ProtoLocs.push_back(readSourceLocation());
1203 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1204 ProtoLocs.data(), Reader.getContext());
1205}
1206
1207void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1208 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1209 // FIXME: odr checking?
1210}
1211
1212void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1213 RedeclarableResult Redecl = VisitRedeclarable(PD);
1214 VisitObjCContainerDecl(PD);
1215 mergeRedeclarable(PD, Redecl);
1216
1217 if (Record.readInt()) {
1218 // Read the definition.
1219 PD->allocateDefinitionData();
1220
1221 ReadObjCDefinitionData(PD->data());
1222
1223 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1224 if (Canon->Data.getPointer()) {
1225 // If we already have a definition, keep the definition invariant and
1226 // merge the data.
1227 MergeDefinitionData(Canon, std::move(PD->data()));
1228 PD->Data = Canon->Data;
1229 } else {
1230 // Set the definition data of the canonical declaration, so other
1231 // redeclarations will see it.
1232 PD->getCanonicalDecl()->Data = PD->Data;
1233 }
1234 // Note that we have deserialized a definition.
1235 Reader.PendingDefinitions.insert(PD);
1236 } else {
1237 PD->Data = PD->getCanonicalDecl()->Data;
1238 }
1239}
1240
1241void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1242 VisitFieldDecl(FD);
1243}
1244
1245void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1246 VisitObjCContainerDecl(CD);
1247 CD->setCategoryNameLoc(readSourceLocation());
1248 CD->setIvarLBraceLoc(readSourceLocation());
1249 CD->setIvarRBraceLoc(readSourceLocation());
1250
1251 // Note that this category has been deserialized. We do this before
1252 // deserializing the interface declaration, so that it will consider this
1253 /// category.
1254 Reader.CategoriesDeserialized.insert(CD);
1255
1256 CD->ClassInterface = readDeclAs<ObjCInterfaceDecl>();
1257 CD->TypeParamList = ReadObjCTypeParamList();
1258 unsigned NumProtoRefs = Record.readInt();
1259 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1260 ProtoRefs.reserve(NumProtoRefs);
1261 for (unsigned I = 0; I != NumProtoRefs; ++I)
1262 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1263 SmallVector<SourceLocation, 16> ProtoLocs;
1264 ProtoLocs.reserve(NumProtoRefs);
1265 for (unsigned I = 0; I != NumProtoRefs; ++I)
1266 ProtoLocs.push_back(readSourceLocation());
1267 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1268 Reader.getContext());
1269
1270 // Protocols in the class extension belong to the class.
1271 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1272 CD->ClassInterface->mergeClassExtensionProtocolList(
1273 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1274 Reader.getContext());
1275}
1276
1277void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1278 VisitNamedDecl(CAD);
1279 CAD->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1280}
1281
1282void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1283 VisitNamedDecl(D);
1284 D->setAtLoc(readSourceLocation());
1285 D->setLParenLoc(readSourceLocation());
1286 QualType T = Record.readType();
1287 TypeSourceInfo *TSI = readTypeSourceInfo();
1288 D->setType(T, TSI);
1289 D->setPropertyAttributes((ObjCPropertyAttribute::Kind)Record.readInt());
1290 D->setPropertyAttributesAsWritten(
1291 (ObjCPropertyAttribute::Kind)Record.readInt());
1292 D->setPropertyImplementation(
1293 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1294 DeclarationName GetterName = Record.readDeclarationName();
1295 SourceLocation GetterLoc = readSourceLocation();
1296 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1297 DeclarationName SetterName = Record.readDeclarationName();
1298 SourceLocation SetterLoc = readSourceLocation();
1299 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1300 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1301 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1302 D->setPropertyIvarDecl(readDeclAs<ObjCIvarDecl>());
1303}
1304
1305void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1306 VisitObjCContainerDecl(D);
1307 D->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1308}
1309
1310void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1311 VisitObjCImplDecl(D);
1312 D->CategoryNameLoc = readSourceLocation();
1313}
1314
1315void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1316 VisitObjCImplDecl(D);
1317 D->setSuperClass(readDeclAs<ObjCInterfaceDecl>());
1318 D->SuperLoc = readSourceLocation();
1319 D->setIvarLBraceLoc(readSourceLocation());
1320 D->setIvarRBraceLoc(readSourceLocation());
1321 D->setHasNonZeroConstructors(Record.readInt());
1322 D->setHasDestructors(Record.readInt());
1323 D->NumIvarInitializers = Record.readInt();
1324 if (D->NumIvarInitializers)
1325 D->IvarInitializers = ReadGlobalOffset();
1326}
1327
1328void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1329 VisitDecl(D);
1330 D->setAtLoc(readSourceLocation());
1331 D->setPropertyDecl(readDeclAs<ObjCPropertyDecl>());
1332 D->PropertyIvarDecl = readDeclAs<ObjCIvarDecl>();
1333 D->IvarLoc = readSourceLocation();
1334 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1335 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1336 D->setGetterCXXConstructor(Record.readExpr());
1337 D->setSetterCXXAssignment(Record.readExpr());
1338}
1339
1340void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1341 VisitDeclaratorDecl(FD);
1342 FD->Mutable = Record.readInt();
1343
1344 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1345 FD->InitStorage.setInt(ISK);
1346 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1347 ? Record.readType().getAsOpaquePtr()
1348 : Record.readExpr());
1349 }
1350
1351 if (auto *BW = Record.readExpr())
1352 FD->setBitWidth(BW);
1353
1354 if (!FD->getDeclName()) {
1355 if (auto *Tmpl = readDeclAs<FieldDecl>())
1356 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1357 }
1358 mergeMergeable(FD);
1359}
1360
1361void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1362 VisitDeclaratorDecl(PD);
1363 PD->GetterId = Record.readIdentifier();
1364 PD->SetterId = Record.readIdentifier();
1365}
1366
1367void ASTDeclReader::VisitMSGuidDecl(MSGuidDecl *D) {
1368 VisitValueDecl(D);
1369 D->PartVal.Part1 = Record.readInt();
1370 D->PartVal.Part2 = Record.readInt();
1371 D->PartVal.Part3 = Record.readInt();
1372 for (auto &C : D->PartVal.Part4And5)
1373 C = Record.readInt();
1374
1375 // Add this GUID to the AST context's lookup structure, and merge if needed.
1376 if (MSGuidDecl *Existing = Reader.getContext().MSGuidDecls.GetOrInsertNode(D))
1377 Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());
1378}
1379
1380void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1381 VisitValueDecl(FD);
1382
1383 FD->ChainingSize = Record.readInt();
1384 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2")((FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2"
) ? static_cast<void> (0) : __assert_fail ("FD->ChainingSize >= 2 && \"Anonymous chaining must be >= 2\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1384, __PRETTY_FUNCTION__))
;
1385 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1386
1387 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1388 FD->Chaining[I] = readDeclAs<NamedDecl>();
1389
1390 mergeMergeable(FD);
1391}
1392
1393ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1394 RedeclarableResult Redecl = VisitRedeclarable(VD);
1395 VisitDeclaratorDecl(VD);
1396
1397 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1398 VD->VarDeclBits.TSCSpec = Record.readInt();
1399 VD->VarDeclBits.InitStyle = Record.readInt();
1400 VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1401 if (!isa<ParmVarDecl>(VD)) {
1402 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1403 Record.readInt();
1404 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1405 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1406 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1407 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1408 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1409 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1410 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1411 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1412 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1413 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1414 VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1415 }
1416 auto VarLinkage = Linkage(Record.readInt());
1417 VD->setCachedLinkage(VarLinkage);
1418
1419 // Reconstruct the one piece of the IdentifierNamespace that we need.
1420 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1421 VD->getLexicalDeclContext()->isFunctionOrMethod())
1422 VD->setLocalExternDecl();
1423
1424 if (uint64_t Val = Record.readInt()) {
1425 VD->setInit(Record.readExpr());
1426 if (Val > 1) {
1427 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1428 Eval->CheckedICE = true;
1429 Eval->IsICE = (Val & 1) != 0;
1430 Eval->HasConstantDestruction = (Val & 4) != 0;
1431 }
1432 }
1433
1434 if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1435 Expr *CopyExpr = Record.readExpr();
1436 if (CopyExpr)
1437 Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1438 }
1439
1440 if (VD->getStorageDuration() == SD_Static && Record.readInt()) {
1441 Reader.DefinitionSource[VD] =
1442 Loc.F->Kind == ModuleKind::MK_MainFile ||
1443 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1444 }
1445
1446 enum VarKind {
1447 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1448 };
1449 switch ((VarKind)Record.readInt()) {
1450 case VarNotTemplate:
1451 // Only true variables (not parameters or implicit parameters) can be
1452 // merged; the other kinds are not really redeclarable at all.
1453 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1454 !isa<VarTemplateSpecializationDecl>(VD))
1455 mergeRedeclarable(VD, Redecl);
1456 break;
1457 case VarTemplate:
1458 // Merged when we merge the template.
1459 VD->setDescribedVarTemplate(readDeclAs<VarTemplateDecl>());
1460 break;
1461 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1462 auto *Tmpl = readDeclAs<VarDecl>();
1463 auto TSK = (TemplateSpecializationKind)Record.readInt();
1464 SourceLocation POI = readSourceLocation();
1465 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1466 mergeRedeclarable(VD, Redecl);
1467 break;
1468 }
1469 }
1470
1471 return Redecl;
1472}
1473
1474void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1475 VisitVarDecl(PD);
1476}
1477
1478void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1479 VisitVarDecl(PD);
1480 unsigned isObjCMethodParam = Record.readInt();
1481 unsigned scopeDepth = Record.readInt();
1482 unsigned scopeIndex = Record.readInt();
1483 unsigned declQualifier = Record.readInt();
1484 if (isObjCMethodParam) {
1485 assert(scopeDepth == 0)((scopeDepth == 0) ? static_cast<void> (0) : __assert_fail
("scopeDepth == 0", "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1485, __PRETTY_FUNCTION__))
;
1486 PD->setObjCMethodScopeInfo(scopeIndex);
1487 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1488 } else {
1489 PD->setScopeInfo(scopeDepth, scopeIndex);
1490 }
1491 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1492 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1493 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1494 PD->setUninstantiatedDefaultArg(Record.readExpr());
1495
1496 // FIXME: If this is a redeclaration of a function from another module, handle
1497 // inheritance of default arguments.
1498}
1499
1500void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1501 VisitVarDecl(DD);
1502 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1503 for (unsigned I = 0; I != DD->NumBindings; ++I) {
1504 BDs[I] = readDeclAs<BindingDecl>();
1505 BDs[I]->setDecomposedDecl(DD);
1506 }
1507}
1508
1509void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1510 VisitValueDecl(BD);
1511 BD->Binding = Record.readExpr();
1512}
1513
1514void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1515 VisitDecl(AD);
1516 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1517 AD->setRParenLoc(readSourceLocation());
1518}
1519
1520void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1521 VisitDecl(BD);
1522 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1523 BD->setSignatureAsWritten(readTypeSourceInfo());
1524 unsigned NumParams = Record.readInt();
1525 SmallVector<ParmVarDecl *, 16> Params;
1526 Params.reserve(NumParams);
1527 for (unsigned I = 0; I != NumParams; ++I)
1528 Params.push_back(readDeclAs<ParmVarDecl>());
1529 BD->setParams(Params);
1530
1531 BD->setIsVariadic(Record.readInt());
1532 BD->setBlockMissingReturnType(Record.readInt());
1533 BD->setIsConversionFromLambda(Record.readInt());
1534 BD->setDoesNotEscape(Record.readInt());
1535 BD->setCanAvoidCopyToHeap(Record.readInt());
1536
1537 bool capturesCXXThis = Record.readInt();
1538 unsigned numCaptures = Record.readInt();
1539 SmallVector<BlockDecl::Capture, 16> captures;
1540 captures.reserve(numCaptures);
1541 for (unsigned i = 0; i != numCaptures; ++i) {
1542 auto *decl = readDeclAs<VarDecl>();
1543 unsigned flags = Record.readInt();
1544 bool byRef = (flags & 1);
1545 bool nested = (flags & 2);
1546 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1547
1548 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1549 }
1550 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1551}
1552
1553void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1554 VisitDecl(CD);
1555 unsigned ContextParamPos = Record.readInt();
1556 CD->setNothrow(Record.readInt() != 0);
1557 // Body is set by VisitCapturedStmt.
1558 for (unsigned I = 0; I < CD->NumParams; ++I) {
1559 if (I != ContextParamPos)
1560 CD->setParam(I, readDeclAs<ImplicitParamDecl>());
1561 else
1562 CD->setContextParam(I, readDeclAs<ImplicitParamDecl>());
1563 }
1564}
1565
1566void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1567 VisitDecl(D);
1568 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1569 D->setExternLoc(readSourceLocation());
1570 D->setRBraceLoc(readSourceLocation());
1571}
1572
1573void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1574 VisitDecl(D);
1575 D->RBraceLoc = readSourceLocation();
1576}
1577
1578void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1579 VisitNamedDecl(D);
1580 D->setLocStart(readSourceLocation());
1581}
1582
1583void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1584 RedeclarableResult Redecl = VisitRedeclarable(D);
1585 VisitNamedDecl(D);
1586 D->setInline(Record.readInt());
1587 D->LocStart = readSourceLocation();
1588 D->RBraceLoc = readSourceLocation();
1589
1590 // Defer loading the anonymous namespace until we've finished merging
1591 // this namespace; loading it might load a later declaration of the
1592 // same namespace, and we have an invariant that older declarations
1593 // get merged before newer ones try to merge.
1594 GlobalDeclID AnonNamespace = 0;
1595 if (Redecl.getFirstID() == ThisDeclID) {
1596 AnonNamespace = readDeclID();
1597 } else {
1598 // Link this namespace back to the first declaration, which has already
1599 // been deserialized.
1600 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1601 }
1602
1603 mergeRedeclarable(D, Redecl);
1604
1605 if (AnonNamespace) {
1606 // Each module has its own anonymous namespace, which is disjoint from
1607 // any other module's anonymous namespaces, so don't attach the anonymous
1608 // namespace at all.
1609 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1610 if (!Record.isModule())
1611 D->setAnonymousNamespace(Anon);
1612 }
1613}
1614
1615void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1616 RedeclarableResult Redecl = VisitRedeclarable(D);
1617 VisitNamedDecl(D);
1618 D->NamespaceLoc = readSourceLocation();
1619 D->IdentLoc = readSourceLocation();
1620 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1621 D->Namespace = readDeclAs<NamedDecl>();
1622 mergeRedeclarable(D, Redecl);
1623}
1624
1625void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1626 VisitNamedDecl(D);
1627 D->setUsingLoc(readSourceLocation());
1628 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1629 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1630 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1631 D->setTypename(Record.readInt());
1632 if (auto *Pattern = readDeclAs<NamedDecl>())
1633 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1634 mergeMergeable(D);
1635}
1636
1637void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1638 VisitNamedDecl(D);
1639 D->InstantiatedFrom = readDeclAs<NamedDecl>();
1640 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1641 for (unsigned I = 0; I != D->NumExpansions; ++I)
1642 Expansions[I] = readDeclAs<NamedDecl>();
1643 mergeMergeable(D);
1644}
1645
1646void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1647 RedeclarableResult Redecl = VisitRedeclarable(D);
1648 VisitNamedDecl(D);
1649 D->Underlying = readDeclAs<NamedDecl>();
1650 D->IdentifierNamespace = Record.readInt();
1651 D->UsingOrNextShadow = readDeclAs<NamedDecl>();
1652 auto *Pattern = readDeclAs<UsingShadowDecl>();
1653 if (Pattern)
1654 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1655 mergeRedeclarable(D, Redecl);
1656}
1657
1658void ASTDeclReader::VisitConstructorUsingShadowDecl(
1659 ConstructorUsingShadowDecl *D) {
1660 VisitUsingShadowDecl(D);
1661 D->NominatedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1662 D->ConstructedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1663 D->IsVirtual = Record.readInt();
1664}
1665
1666void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1667 VisitNamedDecl(D);
1668 D->UsingLoc = readSourceLocation();
1669 D->NamespaceLoc = readSourceLocation();
1670 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1671 D->NominatedNamespace = readDeclAs<NamedDecl>();
1672 D->CommonAncestor = readDeclAs<DeclContext>();
1673}
1674
1675void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1676 VisitValueDecl(D);
1677 D->setUsingLoc(readSourceLocation());
1678 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1679 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1680 D->EllipsisLoc = readSourceLocation();
1681 mergeMergeable(D);
1682}
1683
1684void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1685 UnresolvedUsingTypenameDecl *D) {
1686 VisitTypeDecl(D);
1687 D->TypenameLocation = readSourceLocation();
1688 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1689 D->EllipsisLoc = readSourceLocation();
1690 mergeMergeable(D);
1691}
1692
1693void ASTDeclReader::ReadCXXDefinitionData(
1694 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1695 #define FIELD(Name, Width, Merge) \
1696 Data.Name = Record.readInt();
1697 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1698
1699 // Note: the caller has deserialized the IsLambda bit already.
1700 Data.ODRHash = Record.readInt();
1701 Data.HasODRHash = true;
1702
1703 if (Record.readInt()) {
1704 Reader.DefinitionSource[D] =
1705 Loc.F->Kind == ModuleKind::MK_MainFile ||
1706 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1707 }
1708
1709 Data.NumBases = Record.readInt();
1710 if (Data.NumBases)
1711 Data.Bases = ReadGlobalOffset();
1712 Data.NumVBases = Record.readInt();
1713 if (Data.NumVBases)
1714 Data.VBases = ReadGlobalOffset();
1715
1716 Record.readUnresolvedSet(Data.Conversions);
1717 Data.ComputedVisibleConversions = Record.readInt();
1718 if (Data.ComputedVisibleConversions)
1719 Record.readUnresolvedSet(Data.VisibleConversions);
1720 assert(Data.Definition && "Data.Definition should be already set!")((Data.Definition && "Data.Definition should be already set!"
) ? static_cast<void> (0) : __assert_fail ("Data.Definition && \"Data.Definition should be already set!\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1720, __PRETTY_FUNCTION__))
;
1721 Data.FirstFriend = readDeclID();
1722
1723 if (Data.IsLambda) {
1724 using Capture = LambdaCapture;
1725
1726 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1727 Lambda.Dependent = Record.readInt();
1728 Lambda.IsGenericLambda = Record.readInt();
1729 Lambda.CaptureDefault = Record.readInt();
1730 Lambda.NumCaptures = Record.readInt();
1731 Lambda.NumExplicitCaptures = Record.readInt();
1732 Lambda.HasKnownInternalLinkage = Record.readInt();
1733 Lambda.ManglingNumber = Record.readInt();
1734 Lambda.ContextDecl = readDeclID();
1735 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1736 sizeof(Capture) * Lambda.NumCaptures);
1737 Capture *ToCapture = Lambda.Captures;
1738 Lambda.MethodTyInfo = readTypeSourceInfo();
1739 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1740 SourceLocation Loc = readSourceLocation();
1741 bool IsImplicit = Record.readInt();
1742 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1743 switch (Kind) {
1744 case LCK_StarThis:
1745 case LCK_This:
1746 case LCK_VLAType:
1747 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1748 break;
1749 case LCK_ByCopy:
1750 case LCK_ByRef:
1751 auto *Var = readDeclAs<VarDecl>();
1752 SourceLocation EllipsisLoc = readSourceLocation();
1753 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1754 break;
1755 }
1756 }
1757 }
1758}
1759
1760void ASTDeclReader::MergeDefinitionData(
1761 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1762 assert(D->DefinitionData &&((D->DefinitionData && "merging class definition into non-definition"
) ? static_cast<void> (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1763, __PRETTY_FUNCTION__))
1763 "merging class definition into non-definition")((D->DefinitionData && "merging class definition into non-definition"
) ? static_cast<void> (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1763, __PRETTY_FUNCTION__))
;
1764 auto &DD = *D->DefinitionData;
1765
1766 if (DD.Definition != MergeDD.Definition) {
1767 // Track that we merged the definitions.
1768 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1769 DD.Definition));
1770 Reader.PendingDefinitions.erase(MergeDD.Definition);
1771 MergeDD.Definition->setCompleteDefinition(false);
1772 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1773 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&((Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end
() && "already loaded pending lookups for merged definition"
) ? static_cast<void> (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1774, __PRETTY_FUNCTION__))
1774 "already loaded pending lookups for merged definition")((Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end
() && "already loaded pending lookups for merged definition"
) ? static_cast<void> (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1774, __PRETTY_FUNCTION__))
;
1775 }
1776
1777 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1778 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1779 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1780 // We faked up this definition data because we found a class for which we'd
1781 // not yet loaded the definition. Replace it with the real thing now.
1782 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?")((!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?"
) ? static_cast<void> (0) : __assert_fail ("!DD.IsLambda && !MergeDD.IsLambda && \"faked up lambda definition?\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1782, __PRETTY_FUNCTION__))
;
1783 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1784
1785 // Don't change which declaration is the definition; that is required
1786 // to be invariant once we select it.
1787 auto *Def = DD.Definition;
1788 DD = std::move(MergeDD);
1789 DD.Definition = Def;
1790 return;
1791 }
1792
1793 bool DetectedOdrViolation = false;
1794
1795 #define FIELD(Name, Width, Merge) Merge(Name)
1796 #define MERGE_OR(Field) DD.Field |= MergeDD.Field;
1797 #define NO_MERGE(Field) \
1798 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1799 MERGE_OR(Field)
1800 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1801 NO_MERGE(IsLambda)
1802 #undef NO_MERGE
1803 #undef MERGE_OR
1804
1805 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1806 DetectedOdrViolation = true;
1807 // FIXME: Issue a diagnostic if the base classes don't match when we come
1808 // to lazily load them.
1809
1810 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1811 // match when we come to lazily load them.
1812 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1813 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1814 DD.ComputedVisibleConversions = true;
1815 }
1816
1817 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1818 // lazily load it.
1819
1820 if (DD.IsLambda) {
1821 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1822 // when they occur within the body of a function template specialization).
1823 }
1824
1825 if (D->getODRHash() != MergeDD.ODRHash) {
1826 DetectedOdrViolation = true;
1827 }
1828
1829 if (DetectedOdrViolation)
1830 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1831 {MergeDD.Definition, &MergeDD});
1832}
1833
1834void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1835 struct CXXRecordDecl::DefinitionData *DD;
1836 ASTContext &C = Reader.getContext();
1837
1838 // Determine whether this is a lambda closure type, so that we can
1839 // allocate the appropriate DefinitionData structure.
1840 bool IsLambda = Record.readInt();
1841 if (IsLambda)
1842 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1843 LCD_None);
1844 else
1845 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1846
1847 CXXRecordDecl *Canon = D->getCanonicalDecl();
1848 // Set decl definition data before reading it, so that during deserialization
1849 // when we read CXXRecordDecl, it already has definition data and we don't
1850 // set fake one.
1851 if (!Canon->DefinitionData)
1852 Canon->DefinitionData = DD;
1853 D->DefinitionData = Canon->DefinitionData;
1854 ReadCXXDefinitionData(*DD, D);
1855
1856 // We might already have a different definition for this record. This can
1857 // happen either because we're reading an update record, or because we've
1858 // already done some merging. Either way, just merge into it.
1859 if (Canon->DefinitionData != DD) {
1860 MergeDefinitionData(Canon, std::move(*DD));
1861 return;
1862 }
1863
1864 // Mark this declaration as being a definition.
1865 D->setCompleteDefinition(true);
1866
1867 // If this is not the first declaration or is an update record, we can have
1868 // other redeclarations already. Make a note that we need to propagate the
1869 // DefinitionData pointer onto them.
1870 if (Update || Canon != D)
1871 Reader.PendingDefinitions.insert(D);
1872}
1873
1874ASTDeclReader::RedeclarableResult
1875ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1876 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1877
1878 ASTContext &C = Reader.getContext();
1879
1880 enum CXXRecKind {
1881 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1882 };
1883 switch ((CXXRecKind)Record.readInt()) {
1884 case CXXRecNotTemplate:
1885 // Merged when we merge the folding set entry in the primary template.
1886 if (!isa<ClassTemplateSpecializationDecl>(D))
1887 mergeRedeclarable(D, Redecl);
1888 break;
1889 case CXXRecTemplate: {
1890 // Merged when we merge the template.
1891 auto *Template = readDeclAs<ClassTemplateDecl>();
1892 D->TemplateOrInstantiation = Template;
1893 if (!Template->getTemplatedDecl()) {
1894 // We've not actually loaded the ClassTemplateDecl yet, because we're
1895 // currently being loaded as its pattern. Rely on it to set up our
1896 // TypeForDecl (see VisitClassTemplateDecl).
1897 //
1898 // Beware: we do not yet know our canonical declaration, and may still
1899 // get merged once the surrounding class template has got off the ground.
1900 DeferredTypeID = 0;
1901 }
1902 break;
1903 }
1904 case CXXRecMemberSpecialization: {
1905 auto *RD = readDeclAs<CXXRecordDecl>();
1906 auto TSK = (TemplateSpecializationKind)Record.readInt();
1907 SourceLocation POI = readSourceLocation();
1908 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1909 MSI->setPointOfInstantiation(POI);
1910 D->TemplateOrInstantiation = MSI;
1911 mergeRedeclarable(D, Redecl);
1912 break;
1913 }
1914 }
1915
1916 bool WasDefinition = Record.readInt();
1917 if (WasDefinition)
1918 ReadCXXRecordDefinition(D, /*Update*/false);
1919 else
1920 // Propagate DefinitionData pointer from the canonical declaration.
1921 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1922
1923 // Lazily load the key function to avoid deserializing every method so we can
1924 // compute it.
1925 if (WasDefinition) {
1926 DeclID KeyFn = readDeclID();
1927 if (KeyFn && D->isCompleteDefinition())
1928 // FIXME: This is wrong for the ARM ABI, where some other module may have
1929 // made this function no longer be a key function. We need an update
1930 // record or similar for that case.
1931 C.KeyFunctions[D] = KeyFn;
1932 }
1933
1934 return Redecl;
1935}
1936
1937void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1938 D->setExplicitSpecifier(Record.readExplicitSpec());
1939 VisitFunctionDecl(D);
1940 D->setIsCopyDeductionCandidate(Record.readInt());
1941}
1942
1943void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1944 VisitFunctionDecl(D);
1945
1946 unsigned NumOverridenMethods = Record.readInt();
1947 if (D->isCanonicalDecl()) {
1948 while (NumOverridenMethods--) {
1949 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1950 // MD may be initializing.
1951 if (auto *MD = readDeclAs<CXXMethodDecl>())
1952 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1953 }
1954 } else {
1955 // We don't care about which declarations this used to override; we get
1956 // the relevant information from the canonical declaration.
1957 Record.skipInts(NumOverridenMethods);
1958 }
1959}
1960
1961void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1962 // We need the inherited constructor information to merge the declaration,
1963 // so we have to read it before we call VisitCXXMethodDecl.
1964 D->setExplicitSpecifier(Record.readExplicitSpec());
1965 if (D->isInheritingConstructor()) {
1966 auto *Shadow = readDeclAs<ConstructorUsingShadowDecl>();
1967 auto *Ctor = readDeclAs<CXXConstructorDecl>();
1968 *D->getTrailingObjects<InheritedConstructor>() =
1969 InheritedConstructor(Shadow, Ctor);
1970 }
1971
1972 VisitCXXMethodDecl(D);
1973}
1974
1975void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1976 VisitCXXMethodDecl(D);
1977
1978 if (auto *OperatorDelete = readDeclAs<FunctionDecl>()) {
1979 CXXDestructorDecl *Canon = D->getCanonicalDecl();
1980 auto *ThisArg = Record.readExpr();
1981 // FIXME: Check consistency if we have an old and new operator delete.
1982 if (!Canon->OperatorDelete) {
1983 Canon->OperatorDelete = OperatorDelete;
1984 Canon->OperatorDeleteThisArg = ThisArg;
1985 }
1986 }
1987}
1988
1989void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1990 D->setExplicitSpecifier(Record.readExplicitSpec());
1991 VisitCXXMethodDecl(D);
1992}
1993
1994void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1995 VisitDecl(D);
1996 D->ImportedModule = readModule();
1997 D->setImportComplete(Record.readInt());
1998 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
1999 for (unsigned I = 0, N = Record.back(); I != N; ++I)
2000 StoredLocs[I] = readSourceLocation();
2001 Record.skipInts(1); // The number of stored source locations.
2002}
2003
2004void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
2005 VisitDecl(D);
2006 D->setColonLoc(readSourceLocation());
2007}
2008
2009void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
2010 VisitDecl(D);
2011 if (Record.readInt()) // hasFriendDecl
2012 D->Friend = readDeclAs<NamedDecl>();
2013 else
2014 D->Friend = readTypeSourceInfo();
2015 for (unsigned i = 0; i != D->NumTPLists; ++i)
2016 D->getTrailingObjects<TemplateParameterList *>()[i] =
2017 Record.readTemplateParameterList();
2018 D->NextFriend = readDeclID();
2019 D->UnsupportedFriend = (Record.readInt() != 0);
2020 D->FriendLoc = readSourceLocation();
2021}
2022
2023void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
2024 VisitDecl(D);
2025 unsigned NumParams = Record.readInt();
2026 D->NumParams = NumParams;
2027 D->Params = new TemplateParameterList*[NumParams];
2028 for (unsigned i = 0; i != NumParams; ++i)
2029 D->Params[i] = Record.readTemplateParameterList();
2030 if (Record.readInt()) // HasFriendDecl
2031 D->Friend = readDeclAs<NamedDecl>();
2032 else
2033 D->Friend = readTypeSourceInfo();
2034 D->FriendLoc = readSourceLocation();
2035}
2036
2037DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2038 VisitNamedDecl(D);
2039
2040 DeclID PatternID = readDeclID();
2041 auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2042 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2043 D->init(TemplatedDecl, TemplateParams);
2044
2045 return PatternID;
2046}
2047
2048void ASTDeclReader::VisitConceptDecl(ConceptDecl *D) {
2049 VisitTemplateDecl(D);
2050 D->ConstraintExpr = Record.readExpr();
2051 mergeMergeable(D);
2052}
2053
2054void ASTDeclReader::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) {
2055}
2056
2057ASTDeclReader::RedeclarableResult
2058ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2059 RedeclarableResult Redecl = VisitRedeclarable(D);
2060
2061 // Make sure we've allocated the Common pointer first. We do this before
2062 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2063 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2064 if (!CanonD->Common) {
2065 CanonD->Common = CanonD->newCommon(Reader.getContext());
2066 Reader.PendingDefinitions.insert(CanonD);
2067 }
2068 D->Common = CanonD->Common;
2069
2070 // If this is the first declaration of the template, fill in the information
2071 // for the 'common' pointer.
2072 if (ThisDeclID == Redecl.getFirstID()) {
2073 if (auto *RTD = readDeclAs<RedeclarableTemplateDecl>()) {
2074 assert(RTD->getKind() == D->getKind() &&((RTD->getKind() == D->getKind() && "InstantiatedFromMemberTemplate kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2075, __PRETTY_FUNCTION__))
2075 "InstantiatedFromMemberTemplate kind mismatch")((RTD->getKind() == D->getKind() && "InstantiatedFromMemberTemplate kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2075, __PRETTY_FUNCTION__))
;
2076 D->setInstantiatedFromMemberTemplate(RTD);
2077 if (Record.readInt())
2078 D->setMemberSpecialization();
2079 }
2080 }
2081
2082 DeclID PatternID = VisitTemplateDecl(D);
2083 D->IdentifierNamespace = Record.readInt();
2084
2085 mergeRedeclarable(D, Redecl, PatternID);
2086
2087 // If we merged the template with a prior declaration chain, merge the common
2088 // pointer.
2089 // FIXME: Actually merge here, don't just overwrite.
2090 D->Common = D->getCanonicalDecl()->Common;
2091
2092 return Redecl;
2093}
2094
2095void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2096 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2097
2098 if (ThisDeclID == Redecl.getFirstID()) {
2099 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2100 // the specializations.
2101 SmallVector<serialization::DeclID, 32> SpecIDs;
2102 readDeclIDList(SpecIDs);
2103 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2104 }
2105
2106 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2107 // We were loaded before our templated declaration was. We've not set up
2108 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2109 // it now.
2110 Reader.getContext().getInjectedClassNameType(
2111 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2112 }
2113}
2114
2115void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2116 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2116)
;
2117}
2118
2119/// TODO: Unify with ClassTemplateDecl version?
2120/// May require unifying ClassTemplateDecl and
2121/// VarTemplateDecl beyond TemplateDecl...
2122void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2123 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2124
2125 if (ThisDeclID == Redecl.getFirstID()) {
2126 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2127 // the specializations.
2128 SmallVector<serialization::DeclID, 32> SpecIDs;
2129 readDeclIDList(SpecIDs);
2130 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2131 }
2132}
2133
2134ASTDeclReader::RedeclarableResult
2135ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2136 ClassTemplateSpecializationDecl *D) {
2137 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2138
2139 ASTContext &C = Reader.getContext();
2140 if (Decl *InstD = readDecl()) {
2141 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2142 D->SpecializedTemplate = CTD;
2143 } else {
2144 SmallVector<TemplateArgument, 8> TemplArgs;
2145 Record.readTemplateArgumentList(TemplArgs);
2146 TemplateArgumentList *ArgList
2147 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2148 auto *PS =
2149 new (C) ClassTemplateSpecializationDecl::
2150 SpecializedPartialSpecialization();
2151 PS->PartialSpecialization
2152 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2153 PS->TemplateArgs = ArgList;
2154 D->SpecializedTemplate = PS;
2155 }
2156 }
2157
2158 SmallVector<TemplateArgument, 8> TemplArgs;
2159 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2160 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2161 D->PointOfInstantiation = readSourceLocation();
2162 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2163
2164 bool writtenAsCanonicalDecl = Record.readInt();
2165 if (writtenAsCanonicalDecl) {
2166 auto *CanonPattern = readDeclAs<ClassTemplateDecl>();
2167 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2168 // Set this as, or find, the canonical declaration for this specialization
2169 ClassTemplateSpecializationDecl *CanonSpec;
2170 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2171 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2172 .GetOrInsertNode(Partial);
2173 } else {
2174 CanonSpec =
2175 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2176 }
2177 // If there was already a canonical specialization, merge into it.
2178 if (CanonSpec != D) {
2179 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2180
2181 // This declaration might be a definition. Merge with any existing
2182 // definition.
2183 if (auto *DDD = D->DefinitionData) {
2184 if (CanonSpec->DefinitionData)
2185 MergeDefinitionData(CanonSpec, std::move(*DDD));
2186 else
2187 CanonSpec->DefinitionData = D->DefinitionData;
2188 }
2189 D->DefinitionData = CanonSpec->DefinitionData;
2190 }
2191 }
2192 }
2193
2194 // Explicit info.
2195 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2196 auto *ExplicitInfo =
2197 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2198 ExplicitInfo->TypeAsWritten = TyInfo;
2199 ExplicitInfo->ExternLoc = readSourceLocation();
2200 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2201 D->ExplicitInfo = ExplicitInfo;
2202 }
2203
2204 return Redecl;
2205}
2206
2207void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2208 ClassTemplatePartialSpecializationDecl *D) {
2209 // We need to read the template params first because redeclarable is going to
2210 // need them for profiling
2211 TemplateParameterList *Params = Record.readTemplateParameterList();
2212 D->TemplateParams = Params;
2213 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2214
2215 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2216
2217 // These are read/set from/to the first declaration.
2218 if (ThisDeclID == Redecl.getFirstID()) {
2219 D->InstantiatedFromMember.setPointer(
2220 readDeclAs<ClassTemplatePartialSpecializationDecl>());
2221 D->InstantiatedFromMember.setInt(Record.readInt());
2222 }
2223}
2224
2225void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2226 ClassScopeFunctionSpecializationDecl *D) {
2227 VisitDecl(D);
2228 D->Specialization = readDeclAs<CXXMethodDecl>();
2229 if (Record.readInt())
2230 D->TemplateArgs = Record.readASTTemplateArgumentListInfo();
2231}
2232
2233void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2234 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2235
2236 if (ThisDeclID == Redecl.getFirstID()) {
2237 // This FunctionTemplateDecl owns a CommonPtr; read it.
2238 SmallVector<serialization::DeclID, 32> SpecIDs;
2239 readDeclIDList(SpecIDs);
2240 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2241 }
2242}
2243
2244/// TODO: Unify with ClassTemplateSpecializationDecl version?
2245/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2246/// VarTemplate(Partial)SpecializationDecl with a new data
2247/// structure Template(Partial)SpecializationDecl, and
2248/// using Template(Partial)SpecializationDecl as input type.
2249ASTDeclReader::RedeclarableResult
2250ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2251 VarTemplateSpecializationDecl *D) {
2252 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2253
2254 ASTContext &C = Reader.getContext();
2255 if (Decl *InstD = readDecl()) {
2256 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2257 D->SpecializedTemplate = VTD;
2258 } else {
2259 SmallVector<TemplateArgument, 8> TemplArgs;
2260 Record.readTemplateArgumentList(TemplArgs);
2261 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2262 C, TemplArgs);
2263 auto *PS =
2264 new (C)
2265 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2266 PS->PartialSpecialization =
2267 cast<VarTemplatePartialSpecializationDecl>(InstD);
2268 PS->TemplateArgs = ArgList;
2269 D->SpecializedTemplate = PS;
2270 }
2271 }
2272
2273 // Explicit info.
2274 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2275 auto *ExplicitInfo =
2276 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2277 ExplicitInfo->TypeAsWritten = TyInfo;
2278 ExplicitInfo->ExternLoc = readSourceLocation();
2279 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2280 D->ExplicitInfo = ExplicitInfo;
2281 }
2282
2283 SmallVector<TemplateArgument, 8> TemplArgs;
2284 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2285 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2286 D->PointOfInstantiation = readSourceLocation();
2287 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2288 D->IsCompleteDefinition = Record.readInt();
2289
2290 bool writtenAsCanonicalDecl = Record.readInt();
2291 if (writtenAsCanonicalDecl) {
2292 auto *CanonPattern = readDeclAs<VarTemplateDecl>();
2293 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2294 // FIXME: If it's already present, merge it.
2295 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2296 CanonPattern->getCommonPtr()->PartialSpecializations
2297 .GetOrInsertNode(Partial);
2298 } else {
2299 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2300 }
2301 }
2302 }
2303
2304 return Redecl;
2305}
2306
2307/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2308/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2309/// VarTemplate(Partial)SpecializationDecl with a new data
2310/// structure Template(Partial)SpecializationDecl, and
2311/// using Template(Partial)SpecializationDecl as input type.
2312void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2313 VarTemplatePartialSpecializationDecl *D) {
2314 TemplateParameterList *Params = Record.readTemplateParameterList();
2315 D->TemplateParams = Params;
2316 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2317
2318 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2319
2320 // These are read/set from/to the first declaration.
2321 if (ThisDeclID == Redecl.getFirstID()) {
2322 D->InstantiatedFromMember.setPointer(
2323 readDeclAs<VarTemplatePartialSpecializationDecl>());
2324 D->InstantiatedFromMember.setInt(Record.readInt());
2325 }
2326}
2327
2328void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2329 VisitTypeDecl(D);
2330
2331 D->setDeclaredWithTypename(Record.readInt());
2332
2333 if (Record.readBool()) {
2334 NestedNameSpecifierLoc NNS = Record.readNestedNameSpecifierLoc();
2335 DeclarationNameInfo DN = Record.readDeclarationNameInfo();
2336 ConceptDecl *NamedConcept = Record.readDeclAs<ConceptDecl>();
2337 const ASTTemplateArgumentListInfo *ArgsAsWritten = nullptr;
2338 if (Record.readBool())
2339 ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2340 Expr *ImmediatelyDeclaredConstraint = Record.readExpr();
2341 D->setTypeConstraint(NNS, DN, /*FoundDecl=*/nullptr, NamedConcept,
2342 ArgsAsWritten, ImmediatelyDeclaredConstraint);
2343 if ((D->ExpandedParameterPack = Record.readInt()))
2344 D->NumExpanded = Record.readInt();
2345 }
2346
2347 if (Record.readInt())
2348 D->setDefaultArgument(readTypeSourceInfo());
2349}
2350
2351void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2352 VisitDeclaratorDecl(D);
2353 // TemplateParmPosition.
2354 D->setDepth(Record.readInt());
2355 D->setPosition(Record.readInt());
2356 if (D->hasPlaceholderTypeConstraint())
2357 D->setPlaceholderTypeConstraint(Record.readExpr());
2358 if (D->isExpandedParameterPack()) {
2359 auto TypesAndInfos =
2360 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2361 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2362 new (&TypesAndInfos[I].first) QualType(Record.readType());
2363 TypesAndInfos[I].second = readTypeSourceInfo();
2364 }
2365 } else {
2366 // Rest of NonTypeTemplateParmDecl.
2367 D->ParameterPack = Record.readInt();
2368 if (Record.readInt())
2369 D->setDefaultArgument(Record.readExpr());
2370 }
2371}
2372
2373void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2374 VisitTemplateDecl(D);
2375 // TemplateParmPosition.
2376 D->setDepth(Record.readInt());
2377 D->setPosition(Record.readInt());
2378 if (D->isExpandedParameterPack()) {
2379 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2380 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2381 I != N; ++I)
2382 Data[I] = Record.readTemplateParameterList();
2383 } else {
2384 // Rest of TemplateTemplateParmDecl.
2385 D->ParameterPack = Record.readInt();
2386 if (Record.readInt())
2387 D->setDefaultArgument(Reader.getContext(),
2388 Record.readTemplateArgumentLoc());
2389 }
2390}
2391
2392void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2393 VisitRedeclarableTemplateDecl(D);
2394}
2395
2396void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2397 VisitDecl(D);
2398 D->AssertExprAndFailed.setPointer(Record.readExpr());
2399 D->AssertExprAndFailed.setInt(Record.readInt());
2400 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2401 D->RParenLoc = readSourceLocation();
2402}
2403
2404void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2405 VisitDecl(D);
2406}
2407
2408void ASTDeclReader::VisitLifetimeExtendedTemporaryDecl(
2409 LifetimeExtendedTemporaryDecl *D) {
2410 VisitDecl(D);
2411 D->ExtendingDecl = readDeclAs<ValueDecl>();
2412 D->ExprWithTemporary = Record.readStmt();
2413 if (Record.readInt())
2414 D->Value = new (D->getASTContext()) APValue(Record.readAPValue());
2415 D->ManglingNumber = Record.readInt();
2416 mergeMergeable(D);
2417}
2418
2419std::pair<uint64_t, uint64_t>
2420ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2421 uint64_t LexicalOffset = ReadLocalOffset();
2422 uint64_t VisibleOffset = ReadLocalOffset();
2423 return std::make_pair(LexicalOffset, VisibleOffset);
2424}
2425
2426template <typename T>
2427ASTDeclReader::RedeclarableResult
2428ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2429 DeclID FirstDeclID = readDeclID();
2430 Decl *MergeWith = nullptr;
2431
2432 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2433 bool IsFirstLocalDecl = false;
2434
2435 uint64_t RedeclOffset = 0;
2436
2437 // 0 indicates that this declaration was the only declaration of its entity,
2438 // and is used for space optimization.
2439 if (FirstDeclID == 0) {
2440 FirstDeclID = ThisDeclID;
2441 IsKeyDecl = true;
2442 IsFirstLocalDecl = true;
2443 } else if (unsigned N = Record.readInt()) {
2444 // This declaration was the first local declaration, but may have imported
2445 // other declarations.
2446 IsKeyDecl = N == 1;
2447 IsFirstLocalDecl = true;
2448
2449 // We have some declarations that must be before us in our redeclaration
2450 // chain. Read them now, and remember that we ought to merge with one of
2451 // them.
2452 // FIXME: Provide a known merge target to the second and subsequent such
2453 // declaration.
2454 for (unsigned I = 0; I != N - 1; ++I)
2455 MergeWith = readDecl();
2456
2457 RedeclOffset = ReadLocalOffset();
2458 } else {
2459 // This declaration was not the first local declaration. Read the first
2460 // local declaration now, to trigger the import of other redeclarations.
2461 (void)readDecl();
2462 }
2463
2464 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2465 if (FirstDecl != D) {
2466 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2467 // We temporarily set the first (canonical) declaration as the previous one
2468 // which is the one that matters and mark the real previous DeclID to be
2469 // loaded & attached later on.
2470 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2471 D->First = FirstDecl->getCanonicalDecl();
2472 }
2473
2474 auto *DAsT = static_cast<T *>(D);
2475
2476 // Note that we need to load local redeclarations of this decl and build a
2477 // decl chain for them. This must happen *after* we perform the preloading
2478 // above; this ensures that the redeclaration chain is built in the correct
2479 // order.
2480 if (IsFirstLocalDecl)
2481 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2482
2483 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2484}
2485
2486/// Attempts to merge the given declaration (D) with another declaration
2487/// of the same entity.
2488template<typename T>
2489void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2490 RedeclarableResult &Redecl,
2491 DeclID TemplatePatternID) {
2492 // If modules are not available, there is no reason to perform this merge.
2493 if (!Reader.getContext().getLangOpts().Modules)
2494 return;
2495
2496 // If we're not the canonical declaration, we don't need to merge.
2497 if (!DBase->isFirstDecl())
2498 return;
2499
2500 auto *D = static_cast<T *>(DBase);
2501
2502 if (auto *Existing = Redecl.getKnownMergeTarget())
2503 // We already know of an existing declaration we should merge with.
2504 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2505 else if (FindExistingResult ExistingRes = findExisting(D))
2506 if (T *Existing = ExistingRes)
2507 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2508}
2509
2510/// "Cast" to type T, asserting if we don't have an implicit conversion.
2511/// We use this to put code in a template that will only be valid for certain
2512/// instantiations.
2513template<typename T> static T assert_cast(T t) { return t; }
2514template<typename T> static T assert_cast(...) {
2515 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2515)
;
2516}
2517
2518/// Merge together the pattern declarations from two template
2519/// declarations.
2520void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2521 RedeclarableTemplateDecl *Existing,
2522 DeclID DsID, bool IsKeyDecl) {
2523 auto *DPattern = D->getTemplatedDecl();
2524 auto *ExistingPattern = Existing->getTemplatedDecl();
2525 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2526 DPattern->getCanonicalDecl()->getGlobalID(),
2527 IsKeyDecl);
2528
2529 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2530 // Merge with any existing definition.
2531 // FIXME: This is duplicated in several places. Refactor.
2532 auto *ExistingClass =
2533 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2534 if (auto *DDD = DClass->DefinitionData) {
2535 if (ExistingClass->DefinitionData) {
2536 MergeDefinitionData(ExistingClass, std::move(*DDD));
2537 } else {
2538 ExistingClass->DefinitionData = DClass->DefinitionData;
2539 // We may have skipped this before because we thought that DClass
2540 // was the canonical declaration.
2541 Reader.PendingDefinitions.insert(DClass);
2542 }
2543 }
2544 DClass->DefinitionData = ExistingClass->DefinitionData;
2545
2546 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2547 Result);
2548 }
2549 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2550 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2551 Result);
2552 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2553 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2554 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2555 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2556 Result);
2557 llvm_unreachable("merged an unknown kind of redeclarable template")::llvm::llvm_unreachable_internal("merged an unknown kind of redeclarable template"
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2557)
;
2558}
2559
2560/// Attempts to merge the given declaration (D) with another declaration
2561/// of the same entity.
2562template<typename T>
2563void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2564 RedeclarableResult &Redecl,
2565 DeclID TemplatePatternID) {
2566 auto *D = static_cast<T *>(DBase);
2567 T *ExistingCanon = Existing->getCanonicalDecl();
2568 T *DCanon = D->getCanonicalDecl();
2569 if (ExistingCanon != DCanon) {
2570 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&((DCanon->getGlobalID() == Redecl.getFirstID() && "already merged this declaration"
) ? static_cast<void> (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2571, __PRETTY_FUNCTION__))
2571 "already merged this declaration")((DCanon->getGlobalID() == Redecl.getFirstID() && "already merged this declaration"
) ? static_cast<void> (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2571, __PRETTY_FUNCTION__))
;
2572
2573 // Have our redeclaration link point back at the canonical declaration
2574 // of the existing declaration, so that this declaration has the
2575 // appropriate canonical declaration.
2576 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2577 D->First = ExistingCanon;
2578 ExistingCanon->Used |= D->Used;
2579 D->Used = false;
2580
2581 // When we merge a namespace, update its pointer to the first namespace.
2582 // We cannot have loaded any redeclarations of this declaration yet, so
2583 // there's nothing else that needs to be updated.
2584 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2585 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2586 assert_cast<NamespaceDecl*>(ExistingCanon));
2587
2588 // When we merge a template, merge its pattern.
2589 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2590 mergeTemplatePattern(
2591 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2592 TemplatePatternID, Redecl.isKeyDecl());
2593
2594 // If this declaration is a key declaration, make a note of that.
2595 if (Redecl.isKeyDecl())
2596 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2597 }
2598}
2599
2600/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2601/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2602/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2603/// that some types are mergeable during deserialization, otherwise name
2604/// lookup fails. This is the case for EnumConstantDecl.
2605static bool allowODRLikeMergeInC(NamedDecl *ND) {
2606 if (!ND)
2607 return false;
2608 // TODO: implement merge for other necessary decls.
2609 if (isa<EnumConstantDecl>(ND))
2610 return true;
2611 return false;
2612}
2613
2614/// Attempts to merge LifetimeExtendedTemporaryDecl with
2615/// identical class definitions from two different modules.
2616void ASTDeclReader::mergeMergeable(LifetimeExtendedTemporaryDecl *D) {
2617 // If modules are not available, there is no reason to perform this merge.
2618 if (!Reader.getContext().getLangOpts().Modules)
2619 return;
2620
2621 LifetimeExtendedTemporaryDecl *LETDecl = D;
2622
2623 LifetimeExtendedTemporaryDecl *&LookupResult =
2624 Reader.LETemporaryForMerging[std::make_pair(
2625 LETDecl->getExtendingDecl(), LETDecl->getManglingNumber())];
2626 if (LookupResult)
2627 Reader.getContext().setPrimaryMergedDecl(LETDecl,
2628 LookupResult->getCanonicalDecl());
2629 else
2630 LookupResult = LETDecl;
2631}
2632
2633/// Attempts to merge the given declaration (D) with another declaration
2634/// of the same entity, for the case where the entity is not actually
2635/// redeclarable. This happens, for instance, when merging the fields of
2636/// identical class definitions from two different modules.
2637template<typename T>
2638void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2639 // If modules are not available, there is no reason to perform this merge.
2640 if (!Reader.getContext().getLangOpts().Modules)
1
Assuming field 'Modules' is not equal to 0
2
Taking false branch
2641 return;
2642
2643 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2644 // Note that C identically-named things in different translation units are
2645 // not redeclarations, but may still have compatible types, where ODR-like
2646 // semantics may apply.
2647 if (!Reader.getContext().getLangOpts().CPlusPlus &&
3
Assuming field 'CPlusPlus' is not equal to 0
2648 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2649 return;
2650
2651 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
4
Calling 'ASTDeclReader::findExisting'
2652 if (T *Existing = ExistingRes)
2653 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2654 Existing->getCanonicalDecl());
2655}
2656
2657void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2658 Record.readOMPChildren(D->Data);
2659 VisitDecl(D);
2660}
2661
2662void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2663 Record.readOMPChildren(D->Data);
2664 VisitDecl(D);
2665}
2666
2667void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
2668 Record.readOMPChildren(D->Data);
2669 VisitDecl(D);
2670}
2671
2672void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2673 VisitValueDecl(D);
2674 D->setLocation(readSourceLocation());
2675 Expr *In = Record.readExpr();
2676 Expr *Out = Record.readExpr();
2677 D->setCombinerData(In, Out);
2678 Expr *Combiner = Record.readExpr();
2679 D->setCombiner(Combiner);
2680 Expr *Orig = Record.readExpr();
2681 Expr *Priv = Record.readExpr();
2682 D->setInitializerData(Orig, Priv);
2683 Expr *Init = Record.readExpr();
2684 auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2685 D->setInitializer(Init, IK);
2686 D->PrevDeclInScope = readDeclID();
2687}
2688
2689void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2690 Record.readOMPChildren(D->Data);
2691 VisitValueDecl(D);
2692 D->VarName = Record.readDeclarationName();
2693 D->PrevDeclInScope = readDeclID();
2694}
2695
2696void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2697 VisitVarDecl(D);
2698}
2699
2700//===----------------------------------------------------------------------===//
2701// Attribute Reading
2702//===----------------------------------------------------------------------===//
2703
2704namespace {
2705class AttrReader {
2706 ASTRecordReader &Reader;
2707
2708public:
2709 AttrReader(ASTRecordReader &Reader) : Reader(Reader) {}
2710
2711 uint64_t readInt() {
2712 return Reader.readInt();
2713 }
2714
2715 SourceRange readSourceRange() {
2716 return Reader.readSourceRange();
2717 }
2718
2719 SourceLocation readSourceLocation() {
2720 return Reader.readSourceLocation();
2721 }
2722
2723 Expr *readExpr() { return Reader.readExpr(); }
2724
2725 std::string readString() {
2726 return Reader.readString();
2727 }
2728
2729 TypeSourceInfo *readTypeSourceInfo() {
2730 return Reader.readTypeSourceInfo();
2731 }
2732
2733 IdentifierInfo *readIdentifier() {
2734 return Reader.readIdentifier();
2735 }
2736
2737 VersionTuple readVersionTuple() {
2738 return Reader.readVersionTuple();
2739 }
2740
2741 OMPTraitInfo *readOMPTraitInfo() { return Reader.readOMPTraitInfo(); }
2742
2743 template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2744 return Reader.GetLocalDeclAs<T>(LocalID);
2745 }
2746};
2747}
2748
2749Attr *ASTRecordReader::readAttr() {
2750 AttrReader Record(*this);
2751 auto V = Record.readInt();
2752 if (!V)
2753 return nullptr;
2754
2755 Attr *New = nullptr;
2756 // Kind is stored as a 1-based integer because 0 is used to indicate a null
2757 // Attr pointer.
2758 auto Kind = static_cast<attr::Kind>(V - 1);
2759 ASTContext &Context = getContext();
2760
2761 IdentifierInfo *AttrName = Record.readIdentifier();
2762 IdentifierInfo *ScopeName = Record.readIdentifier();
2763 SourceRange AttrRange = Record.readSourceRange();
2764 SourceLocation ScopeLoc = Record.readSourceLocation();
2765 unsigned ParsedKind = Record.readInt();
2766 unsigned Syntax = Record.readInt();
2767 unsigned SpellingIndex = Record.readInt();
2768
2769 AttributeCommonInfo Info(AttrName, ScopeName, AttrRange, ScopeLoc,
2770 AttributeCommonInfo::Kind(ParsedKind),
2771 AttributeCommonInfo::Syntax(Syntax), SpellingIndex);
2772
2773#include "clang/Serialization/AttrPCHRead.inc"
2774
2775 assert(New && "Unable to decode attribute?")((New && "Unable to decode attribute?") ? static_cast
<void> (0) : __assert_fail ("New && \"Unable to decode attribute?\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2775, __PRETTY_FUNCTION__))
;
2776 return New;
2777}
2778
2779/// Reads attributes from the current stream position.
2780void ASTRecordReader::readAttributes(AttrVec &Attrs) {
2781 for (unsigned I = 0, E = readInt(); I != E; ++I)
2782 Attrs.push_back(readAttr());
2783}
2784
2785//===----------------------------------------------------------------------===//
2786// ASTReader Implementation
2787//===----------------------------------------------------------------------===//
2788
2789/// Note that we have loaded the declaration with the given
2790/// Index.
2791///
2792/// This routine notes that this declaration has already been loaded,
2793/// so that future GetDecl calls will return this declaration rather
2794/// than trying to load a new declaration.
2795inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2796 assert(!DeclsLoaded[Index] && "Decl loaded twice?")((!DeclsLoaded[Index] && "Decl loaded twice?") ? static_cast
<void> (0) : __assert_fail ("!DeclsLoaded[Index] && \"Decl loaded twice?\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2796, __PRETTY_FUNCTION__))
;
2797 DeclsLoaded[Index] = D;
2798}
2799
2800/// Determine whether the consumer will be interested in seeing
2801/// this declaration (via HandleTopLevelDecl).
2802///
2803/// This routine should return true for anything that might affect
2804/// code generation, e.g., inline function definitions, Objective-C
2805/// declarations with metadata, etc.
2806static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2807 // An ObjCMethodDecl is never considered as "interesting" because its
2808 // implementation container always is.
2809
2810 // An ImportDecl or VarDecl imported from a module map module will get
2811 // emitted when we import the relevant module.
2812 if (isPartOfPerModuleInitializer(D)) {
2813 auto *M = D->getImportedOwningModule();
2814 if (M && M->Kind == Module::ModuleMapModule &&
2815 Ctx.DeclMustBeEmitted(D))
2816 return false;
2817 }
2818
2819 if (isa<FileScopeAsmDecl>(D) ||
2820 isa<ObjCProtocolDecl>(D) ||
2821 isa<ObjCImplDecl>(D) ||
2822 isa<ImportDecl>(D) ||
2823 isa<PragmaCommentDecl>(D) ||
2824 isa<PragmaDetectMismatchDecl>(D))
2825 return true;
2826 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2827 isa<OMPDeclareMapperDecl>(D) || isa<OMPAllocateDecl>(D) ||
2828 isa<OMPRequiresDecl>(D))
2829 return !D->getDeclContext()->isFunctionOrMethod();
2830 if (const auto *Var = dyn_cast<VarDecl>(D))
2831 return Var->isFileVarDecl() &&
2832 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2833 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2834 if (const auto *Func = dyn_cast<FunctionDecl>(D))
2835 return Func->doesThisDeclarationHaveABody() || HasBody;
2836
2837 if (auto *ES = D->getASTContext().getExternalSource())
2838 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2839 return true;
2840
2841 return false;
2842}
2843
2844/// Get the correct cursor and offset for loading a declaration.
2845ASTReader::RecordLocation
2846ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2847 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2848 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")((I != GlobalDeclMap.end() && "Corrupted global declaration map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2848, __PRETTY_FUNCTION__))
;
2849 ModuleFile *M = I->second;
2850 const DeclOffset &DOffs =
2851 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2852 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2853 return RecordLocation(M, DOffs.getBitOffset(M->DeclsBlockStartOffset));
2854}
2855
2856ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2857 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2858
2859 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map")((I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalBitOffsetsMap.end() && \"Corrupted global bit offsets map\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2859, __PRETTY_FUNCTION__))
;
2860 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2861}
2862
2863uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint64_t LocalOffset) {
2864 return LocalOffset + M.GlobalBitOffset;
2865}
2866
2867static bool isSameTemplateParameterList(const ASTContext &C,
2868 const TemplateParameterList *X,
2869 const TemplateParameterList *Y);
2870
2871/// Determine whether two template parameters are similar enough
2872/// that they may be used in declarations of the same template.
2873static bool isSameTemplateParameter(const NamedDecl *X,
2874 const NamedDecl *Y) {
2875 if (X->getKind() != Y->getKind())
2876 return false;
2877
2878 if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2879 const auto *TY = cast<TemplateTypeParmDecl>(Y);
2880 if (TX->isParameterPack() != TY->isParameterPack())
2881 return false;
2882 if (TX->hasTypeConstraint() != TY->hasTypeConstraint())
2883 return false;
2884 const TypeConstraint *TXTC = TX->getTypeConstraint();
2885 const TypeConstraint *TYTC = TY->getTypeConstraint();
2886 if (!TXTC != !TYTC)
2887 return false;
2888 if (TXTC && TYTC) {
2889 if (TXTC->getNamedConcept() != TYTC->getNamedConcept())
2890 return false;
2891 if (TXTC->hasExplicitTemplateArgs() != TYTC->hasExplicitTemplateArgs())
2892 return false;
2893 if (TXTC->hasExplicitTemplateArgs()) {
2894 const auto *TXTCArgs = TXTC->getTemplateArgsAsWritten();
2895 const auto *TYTCArgs = TYTC->getTemplateArgsAsWritten();
2896 if (TXTCArgs->NumTemplateArgs != TYTCArgs->NumTemplateArgs)
2897 return false;
2898 llvm::FoldingSetNodeID XID, YID;
2899 for (const auto &ArgLoc : TXTCArgs->arguments())
2900 ArgLoc.getArgument().Profile(XID, X->getASTContext());
2901 for (const auto &ArgLoc : TYTCArgs->arguments())
2902 ArgLoc.getArgument().Profile(YID, Y->getASTContext());
2903 if (XID != YID)
2904 return false;
2905 }
2906 }
2907 return true;
2908 }
2909
2910 if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2911 const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2912 return TX->isParameterPack() == TY->isParameterPack() &&
2913 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2914 }
2915
2916 const auto *TX = cast<TemplateTemplateParmDecl>(X);
2917 const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2918 return TX->isParameterPack() == TY->isParameterPack() &&
2919 isSameTemplateParameterList(TX->getASTContext(),
2920 TX->getTemplateParameters(),
2921 TY->getTemplateParameters());
2922}
2923
2924static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2925 if (auto *NS = X->getAsNamespace())
2926 return NS;
2927 if (auto *NAS = X->getAsNamespaceAlias())
2928 return NAS->getNamespace();
2929 return nullptr;
2930}
2931
2932static bool isSameQualifier(const NestedNameSpecifier *X,
2933 const NestedNameSpecifier *Y) {
2934 if (auto *NSX = getNamespace(X)) {
2935 auto *NSY = getNamespace(Y);
2936 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2937 return false;
2938 } else if (X->getKind() != Y->getKind())
2939 return false;
2940
2941 // FIXME: For namespaces and types, we're permitted to check that the entity
2942 // is named via the same tokens. We should probably do so.
2943 switch (X->getKind()) {
2944 case NestedNameSpecifier::Identifier:
2945 if (X->getAsIdentifier() != Y->getAsIdentifier())
2946 return false;
2947 break;
2948 case NestedNameSpecifier::Namespace:
2949 case NestedNameSpecifier::NamespaceAlias:
2950 // We've already checked that we named the same namespace.
2951 break;
2952 case NestedNameSpecifier::TypeSpec:
2953 case NestedNameSpecifier::TypeSpecWithTemplate:
2954 if (X->getAsType()->getCanonicalTypeInternal() !=
2955 Y->getAsType()->getCanonicalTypeInternal())
2956 return false;
2957 break;
2958 case NestedNameSpecifier::Global:
2959 case NestedNameSpecifier::Super:
2960 return true;
2961 }
2962
2963 // Recurse into earlier portion of NNS, if any.
2964 auto *PX = X->getPrefix();
2965 auto *PY = Y->getPrefix();
2966 if (PX && PY)
2967 return isSameQualifier(PX, PY);
2968 return !PX && !PY;
2969}
2970
2971/// Determine whether two template parameter lists are similar enough
2972/// that they may be used in declarations of the same template.
2973static bool isSameTemplateParameterList(const ASTContext &C,
2974 const TemplateParameterList *X,
2975 const TemplateParameterList *Y) {
2976 if (X->size() != Y->size())
2977 return false;
2978
2979 for (unsigned I = 0, N = X->size(); I != N; ++I)
2980 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2981 return false;
2982
2983 const Expr *XRC = X->getRequiresClause();
2984 const Expr *YRC = Y->getRequiresClause();
2985 if (!XRC != !YRC)
2986 return false;
2987 if (XRC) {
2988 llvm::FoldingSetNodeID XRCID, YRCID;
2989 XRC->Profile(XRCID, C, /*Canonical=*/true);
2990 YRC->Profile(YRCID, C, /*Canonical=*/true);
2991 if (XRCID != YRCID)
2992 return false;
2993 }
2994
2995 return true;
2996}
2997
2998/// Determine whether the attributes we can overload on are identical for A and
2999/// B. Will ignore any overloadable attrs represented in the type of A and B.
3000static bool hasSameOverloadableAttrs(const FunctionDecl *A,
3001 const FunctionDecl *B) {
3002 // Note that pass_object_size attributes are represented in the function's
3003 // ExtParameterInfo, so we don't need to check them here.
3004
3005 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
3006 auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
3007 auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
3008
3009 for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
3010 Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
3011 Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
3012
3013 // Return false if the number of enable_if attributes is different.
3014 if (!Cand1A || !Cand2A)
3015 return false;
3016
3017 Cand1ID.clear();
3018 Cand2ID.clear();
3019
3020 (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
3021 (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
3022
3023 // Return false if any of the enable_if expressions of A and B are
3024 // different.
3025 if (Cand1ID != Cand2ID)
3026 return false;
3027 }
3028 return true;
3029}
3030
3031/// Determine whether the two declarations refer to the same entity.pr
3032static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
3033 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!")((X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!"
) ? static_cast<void> (0) : __assert_fail ("X->getDeclName() == Y->getDeclName() && \"Declaration name mismatch!\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3033, __PRETTY_FUNCTION__))
;
3034
3035 if (X == Y)
3036 return true;
3037
3038 // Must be in the same context.
3039 //
3040 // Note that we can't use DeclContext::Equals here, because the DeclContexts
3041 // could be two different declarations of the same function. (We will fix the
3042 // semantic DC to refer to the primary definition after merging.)
3043 if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
3044 cast<Decl>(Y->getDeclContext()->getRedeclContext())))
3045 return false;
3046
3047 // Two typedefs refer to the same entity if they have the same underlying
3048 // type.
3049 if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
3050 if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
3051 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
3052 TypedefY->getUnderlyingType());
3053
3054 // Must have the same kind.
3055 if (X->getKind() != Y->getKind())
3056 return false;
3057
3058 // Objective-C classes and protocols with the same name always match.
3059 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
3060 return true;
3061
3062 if (isa<ClassTemplateSpecializationDecl>(X)) {
3063 // No need to handle these here: we merge them when adding them to the
3064 // template.
3065 return false;
3066 }
3067
3068 // Compatible tags match.
3069 if (const auto *TagX = dyn_cast<TagDecl>(X)) {
3070 const auto *TagY = cast<TagDecl>(Y);
3071 return (TagX->getTagKind() == TagY->getTagKind()) ||
3072 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
3073 TagX->getTagKind() == TTK_Interface) &&
3074 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
3075 TagY->getTagKind() == TTK_Interface));
3076 }
3077
3078 // Functions with the same type and linkage match.
3079 // FIXME: This needs to cope with merging of prototyped/non-prototyped
3080 // functions, etc.
3081 if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
3082 const auto *FuncY = cast<FunctionDecl>(Y);
3083 if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
3084 const auto *CtorY = cast<CXXConstructorDecl>(Y);
3085 if (CtorX->getInheritedConstructor() &&
3086 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
3087 CtorY->getInheritedConstructor().getConstructor()))
3088 return false;
3089 }
3090
3091 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3092 return false;
3093
3094 // Multiversioned functions with different feature strings are represented
3095 // as separate declarations.
3096 if (FuncX->isMultiVersion()) {
3097 const auto *TAX = FuncX->getAttr<TargetAttr>();
3098 const auto *TAY = FuncY->getAttr<TargetAttr>();
3099 assert(TAX && TAY && "Multiversion Function without target attribute")((TAX && TAY && "Multiversion Function without target attribute"
) ? static_cast<void> (0) : __assert_fail ("TAX && TAY && \"Multiversion Function without target attribute\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3099, __PRETTY_FUNCTION__))
;
3100
3101 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3102 return false;
3103 }
3104
3105 ASTContext &C = FuncX->getASTContext();
3106
3107 const Expr *XRC = FuncX->getTrailingRequiresClause();
3108 const Expr *YRC = FuncY->getTrailingRequiresClause();
3109 if (!XRC != !YRC)
3110 return false;
3111 if (XRC) {
3112 llvm::FoldingSetNodeID XRCID, YRCID;
3113 XRC->Profile(XRCID, C, /*Canonical=*/true);
3114 YRC->Profile(YRCID, C, /*Canonical=*/true);
3115 if (XRCID != YRCID)
3116 return false;
3117 }
3118
3119 auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3120 // Map to the first declaration that we've already merged into this one.
3121 // The TSI of redeclarations might not match (due to calling conventions
3122 // being inherited onto the type but not the TSI), but the TSI type of
3123 // the first declaration of the function should match across modules.
3124 FD = FD->getCanonicalDecl();
3125 return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3126 : FD->getType();
3127 };
3128 QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3129 if (!C.hasSameType(XT, YT)) {
3130 // We can get functions with different types on the redecl chain in C++17
3131 // if they have differing exception specifications and at least one of
3132 // the excpetion specs is unresolved.
3133 auto *XFPT = XT->getAs<FunctionProtoType>();
3134 auto *YFPT = YT->getAs<FunctionProtoType>();
3135 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3136 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3137 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
3138 C.hasSameFunctionTypeIgnoringExceptionSpec(XT, YT))
3139 return true;
3140 return false;
3141 }
3142
3143 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3144 hasSameOverloadableAttrs(FuncX, FuncY);
3145 }
3146
3147 // Variables with the same type and linkage match.
3148 if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3149 const auto *VarY = cast<VarDecl>(Y);
3150 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3151 ASTContext &C = VarX->getASTContext();
3152 if (C.hasSameType(VarX->getType(), VarY->getType()))
3153 return true;
3154
3155 // We can get decls with different types on the redecl chain. Eg.
3156 // template <typename T> struct S { static T Var[]; }; // #1
3157 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3158 // Only? happens when completing an incomplete array type. In this case
3159 // when comparing #1 and #2 we should go through their element type.
3160 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3161 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3162 if (!VarXTy || !VarYTy)
3163 return false;
3164 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3165 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3166 }
3167 return false;
3168 }
3169
3170 // Namespaces with the same name and inlinedness match.
3171 if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3172 const auto *NamespaceY = cast<NamespaceDecl>(Y);
3173 return NamespaceX->isInline() == NamespaceY->isInline();
3174 }
3175
3176 // Identical template names and kinds match if their template parameter lists
3177 // and patterns match.
3178 if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3179 const auto *TemplateY = cast<TemplateDecl>(Y);
3180 return isSameEntity(TemplateX->getTemplatedDecl(),
3181 TemplateY->getTemplatedDecl()) &&
3182 isSameTemplateParameterList(TemplateX->getASTContext(),
3183 TemplateX->getTemplateParameters(),
3184 TemplateY->getTemplateParameters());
3185 }
3186
3187 // Fields with the same name and the same type match.
3188 if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3189 const auto *FDY = cast<FieldDecl>(Y);
3190 // FIXME: Also check the bitwidth is odr-equivalent, if any.
3191 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3192 }
3193
3194 // Indirect fields with the same target field match.
3195 if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3196 const auto *IFDY = cast<IndirectFieldDecl>(Y);
3197 return IFDX->getAnonField()->getCanonicalDecl() ==
3198 IFDY->getAnonField()->getCanonicalDecl();
3199 }
3200
3201 // Enumerators with the same name match.
3202 if (isa<EnumConstantDecl>(X))
3203 // FIXME: Also check the value is odr-equivalent.
3204 return true;
3205
3206 // Using shadow declarations with the same target match.
3207 if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3208 const auto *USY = cast<UsingShadowDecl>(Y);
3209 return USX->getTargetDecl() == USY->getTargetDecl();
3210 }
3211
3212 // Using declarations with the same qualifier match. (We already know that
3213 // the name matches.)
3214 if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3215 const auto *UY = cast<UsingDecl>(Y);
3216 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3217 UX->hasTypename() == UY->hasTypename() &&
3218 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3219 }
3220 if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3221 const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3222 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3223 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3224 }
3225 if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3226 return isSameQualifier(
3227 UX->getQualifier(),
3228 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3229
3230 // Namespace alias definitions with the same target match.
3231 if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3232 const auto *NAY = cast<NamespaceAliasDecl>(Y);
3233 return NAX->getNamespace()->Equals(NAY->getNamespace());
3234 }
3235
3236 return false;
3237}
3238
3239/// Find the context in which we should search for previous declarations when
3240/// looking for declarations to merge.
3241DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3242 DeclContext *DC) {
3243 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3244 return ND->getOriginalNamespace();
3245
3246 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3247 // Try to dig out the definition.
3248 auto *DD = RD->DefinitionData;
3249 if (!DD)
3250 DD = RD->getCanonicalDecl()->DefinitionData;
3251
3252 // If there's no definition yet, then DC's definition is added by an update
3253 // record, but we've not yet loaded that update record. In this case, we
3254 // commit to DC being the canonical definition now, and will fix this when
3255 // we load the update record.
3256 if (!DD) {
3257 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3258 RD->setCompleteDefinition(true);
3259 RD->DefinitionData = DD;
3260 RD->getCanonicalDecl()->DefinitionData = DD;
3261
3262 // Track that we did this horrible thing so that we can fix it later.
3263 Reader.PendingFakeDefinitionData.insert(
3264 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3265 }
3266
3267 return DD->Definition;
3268 }
3269
3270 if (auto *ED = dyn_cast<EnumDecl>(DC))
3271 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3272 : nullptr;
3273
3274 // We can see the TU here only if we have no Sema object. In that case,
3275 // there's no TU scope to look in, so using the DC alone is sufficient.
3276 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3277 return TU;
3278
3279 return nullptr;
3280}
3281
3282ASTDeclReader::FindExistingResult::~FindExistingResult() {
3283 // Record that we had a typedef name for linkage whether or not we merge
3284 // with that declaration.
3285 if (TypedefNameForLinkage) {
3286 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3287 Reader.ImportedTypedefNamesForLinkage.insert(
3288 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3289 return;
3290 }
3291
3292 if (!AddResult || Existing)
3293 return;
3294
3295 DeclarationName Name = New->getDeclName();
3296 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3297 if (needsAnonymousDeclarationNumber(New)) {
3298 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3299 AnonymousDeclNumber, New);
3300 } else if (DC->isTranslationUnit() &&
3301 !Reader.getContext().getLangOpts().CPlusPlus) {
3302 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3303 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3304 .push_back(New);
3305 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3306 // Add the declaration to its redeclaration context so later merging
3307 // lookups will find it.
3308 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3309 }
3310}
3311
3312/// Find the declaration that should be merged into, given the declaration found
3313/// by name lookup. If we're merging an anonymous declaration within a typedef,
3314/// we need a matching typedef, and we merge with the type inside it.
3315static NamedDecl *getDeclForMerging(NamedDecl *Found,
3316 bool IsTypedefNameForLinkage) {
3317 if (!IsTypedefNameForLinkage)
3318 return Found;
3319
3320 // If we found a typedef declaration that gives a name to some other
3321 // declaration, then we want that inner declaration. Declarations from
3322 // AST files are handled via ImportedTypedefNamesForLinkage.
3323 if (Found->isFromASTFile())
3324 return nullptr;
3325
3326 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3327 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3328
3329 return nullptr;
3330}
3331
3332/// Find the declaration to use to populate the anonymous declaration table
3333/// for the given lexical DeclContext. We only care about finding local
3334/// definitions of the context; we'll merge imported ones as we go.
3335DeclContext *
3336ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3337 // For classes, we track the definition as we merge.
3338 if (auto *RD
16.1
'RD' is null
= dyn_cast<CXXRecordDecl>(LexicalDC)) {
16
Assuming 'LexicalDC' is not a 'CXXRecordDecl'
17
Taking false branch
3339 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3340 return DD ? DD->Definition : nullptr;
3341 }
3342
3343 // For anything else, walk its merged redeclarations looking for a definition.
3344 // Note that we can't just call getDefinition here because the redeclaration
3345 // chain isn't wired up.
3346 for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
18
'LexicalDC' is a 'Decl'
23
Calling 'MergedRedeclIterator::operator++'
27
Returning from 'MergedRedeclIterator::operator++'
32
Calling 'MergedRedeclIterator::operator++'
3347 if (auto *FD
19.1
'FD' is null
= dyn_cast<FunctionDecl>(D))
19
Assuming 'D' is not a 'FunctionDecl'
20
Taking false branch
28
Assuming 'FD' is null
29
Taking false branch
3348 if (FD->isThisDeclarationADefinition())
3349 return FD;
3350 if (auto *MD
21.1
'MD' is null
= dyn_cast<ObjCMethodDecl>(D))
21
Assuming 'D' is not a 'ObjCMethodDecl'
22
Taking false branch
30
Assuming 'MD' is null
31
Taking false branch
3351 if (MD->isThisDeclarationADefinition())
3352 return MD;
3353 }
3354
3355 // No merged definition yet.
3356 return nullptr;
3357}
3358
3359NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3360 DeclContext *DC,
3361 unsigned Index) {
3362 // If the lexical context has been merged, look into the now-canonical
3363 // definition.
3364 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
13
'DC' is a 'Decl'
3365
3366 // If we've seen this before, return the canonical declaration.
3367 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3368 if (Index < Previous.size() && Previous[Index])
14
Assuming the condition is false
3369 return Previous[Index];
3370
3371 // If this is the first time, but we have parsed a declaration of the context,
3372 // build the anonymous declaration list from the parsed declaration.
3373 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
15
Calling 'ASTDeclReader::getPrimaryDCForAnonymousDecl'
3374 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3375 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3376 if (Previous.size() == Number)
3377 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3378 else
3379 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3380 });
3381 }
3382
3383 return Index < Previous.size() ? Previous[Index] : nullptr;
3384}
3385
3386void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3387 DeclContext *DC, unsigned Index,
3388 NamedDecl *D) {
3389 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3390
3391 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3392 if (Index >= Previous.size())
3393 Previous.resize(Index + 1);
3394 if (!Previous[Index])
3395 Previous[Index] = D;
3396}
3397
3398ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3399 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
5
Assuming field 'TypedefNameForLinkage' is null
6
'?' condition is false
3400 : D->getDeclName();
3401
3402 if (!Name && !needsAnonymousDeclarationNumber(D)) {
7
Assuming the condition is false
8
Taking false branch
3403 // Don't bother trying to find unnamed declarations that are in
3404 // unmergeable contexts.
3405 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3406 AnonymousDeclNumber, TypedefNameForLinkage);
3407 Result.suppress();
3408 return Result;
3409 }
3410
3411 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3412 if (TypedefNameForLinkage
8.1
Field 'TypedefNameForLinkage' is null
) {
9
Taking false branch
3413 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3414 std::make_pair(DC, TypedefNameForLinkage));
3415 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3416 if (isSameEntity(It->second, D))
3417 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3418 TypedefNameForLinkage);
3419 // Go on to check in other places in case an existing typedef name
3420 // was not imported.
3421 }
3422
3423 if (needsAnonymousDeclarationNumber(D)) {
10
Assuming the condition is true
11
Taking true branch
3424 // This is an anonymous declaration that we may need to merge. Look it up
3425 // in its context by number.
3426 if (auto *Existing = getAnonymousDeclForMerging(
12
Calling 'ASTDeclReader::getAnonymousDeclForMerging'
3427 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3428 if (isSameEntity(Existing, D))
3429 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3430 TypedefNameForLinkage);
3431 } else if (DC->isTranslationUnit() &&
3432 !Reader.getContext().getLangOpts().CPlusPlus) {
3433 IdentifierResolver &IdResolver = Reader.getIdResolver();
3434
3435 // Temporarily consider the identifier to be up-to-date. We don't want to
3436 // cause additional lookups here.
3437 class UpToDateIdentifierRAII {
3438 IdentifierInfo *II;
3439 bool WasOutToDate = false;
3440
3441 public:
3442 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3443 if (II) {
3444 WasOutToDate = II->isOutOfDate();
3445 if (WasOutToDate)
3446 II->setOutOfDate(false);
3447 }
3448 }
3449
3450 ~UpToDateIdentifierRAII() {
3451 if (WasOutToDate)
3452 II->setOutOfDate(true);
3453 }
3454 } UpToDate(Name.getAsIdentifierInfo());
3455
3456 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3457 IEnd = IdResolver.end();
3458 I != IEnd; ++I) {
3459 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3460 if (isSameEntity(Existing, D))
3461 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3462 TypedefNameForLinkage);
3463 }
3464 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3465 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3466 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3467 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3468 if (isSameEntity(Existing, D))
3469 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3470 TypedefNameForLinkage);
3471 }
3472 } else {
3473 // Not in a mergeable context.
3474 return FindExistingResult(Reader);
3475 }
3476
3477 // If this declaration is from a merged context, make a note that we need to
3478 // check that the canonical definition of that context contains the decl.
3479 //
3480 // FIXME: We should do something similar if we merge two definitions of the
3481 // same template specialization into the same CXXRecordDecl.
3482 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3483 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3484 MergedDCIt->second == D->getDeclContext())
3485 Reader.PendingOdrMergeChecks.push_back(D);
3486
3487 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3488 AnonymousDeclNumber, TypedefNameForLinkage);
3489}
3490
3491template<typename DeclT>
3492Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3493 return D->RedeclLink.getLatestNotUpdated();
3494}
3495
3496Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3497 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3497)
;
3498}
3499
3500Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3501 assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3501, __PRETTY_FUNCTION__))
;
3502
3503 switch (D->getKind()) {
3504#define ABSTRACT_DECL(TYPE)
3505#define DECL(TYPE, BASE) \
3506 case Decl::TYPE: \
3507 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3508#include "clang/AST/DeclNodes.inc"
3509 }
3510 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3510)
;
3511}
3512
3513Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3514 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3515}
3516
3517void ASTDeclReader::mergeInheritableAttributes(ASTReader &Reader, Decl *D,
3518 Decl *Previous) {
3519 InheritableAttr *NewAttr = nullptr;
3520 ASTContext &Context = Reader.getContext();
3521 const auto *IA = Previous->getAttr<MSInheritanceAttr>();
3522
3523 if (IA && !D->hasAttr<MSInheritanceAttr>()) {
3524 NewAttr = cast<InheritableAttr>(IA->clone(Context));
3525 NewAttr->setInherited(true);
3526 D->addAttr(NewAttr);
3527 }
3528}
3529
3530template<typename DeclT>
3531void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3532 Redeclarable<DeclT> *D,
3533 Decl *Previous, Decl *Canon) {
3534 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3535 D->First = cast<DeclT>(Previous)->First;
3536}
3537
3538namespace clang {
3539
3540template<>
3541void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3542 Redeclarable<VarDecl> *D,
3543 Decl *Previous, Decl *Canon) {
3544 auto *VD = static_cast<VarDecl *>(D);
3545 auto *PrevVD = cast<VarDecl>(Previous);
3546 D->RedeclLink.setPrevious(PrevVD);
3547 D->First = PrevVD->First;
3548
3549 // We should keep at most one definition on the chain.
3550 // FIXME: Cache the definition once we've found it. Building a chain with
3551 // N definitions currently takes O(N^2) time here.
3552 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3553 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3554 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3555 Reader.mergeDefinitionVisibility(CurD, VD);
3556 VD->demoteThisDefinitionToDeclaration();
3557 break;
3558 }
3559 }
3560 }
3561}
3562
3563static bool isUndeducedReturnType(QualType T) {
3564 auto *DT = T->getContainedDeducedType();
3565 return DT && !DT->isDeduced();
3566}
3567
3568template<>
3569void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3570 Redeclarable<FunctionDecl> *D,
3571 Decl *Previous, Decl *Canon) {
3572 auto *FD = static_cast<FunctionDecl *>(D);
3573 auto *PrevFD = cast<FunctionDecl>(Previous);
3574
3575 FD->RedeclLink.setPrevious(PrevFD);
3576 FD->First = PrevFD->First;
3577
3578 // If the previous declaration is an inline function declaration, then this
3579 // declaration is too.
3580 if (PrevFD->isInlined() != FD->isInlined()) {
3581 // FIXME: [dcl.fct.spec]p4:
3582 // If a function with external linkage is declared inline in one
3583 // translation unit, it shall be declared inline in all translation
3584 // units in which it appears.
3585 //
3586 // Be careful of this case:
3587 //
3588 // module A:
3589 // template<typename T> struct X { void f(); };
3590 // template<typename T> inline void X<T>::f() {}
3591 //
3592 // module B instantiates the declaration of X<int>::f
3593 // module C instantiates the definition of X<int>::f
3594 //
3595 // If module B and C are merged, we do not have a violation of this rule.
3596 FD->setImplicitlyInline(true);
3597 }
3598
3599 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3600 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3601 if (FPT && PrevFPT) {
3602 // If we need to propagate an exception specification along the redecl
3603 // chain, make a note of that so that we can do so later.
3604 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3605 bool WasUnresolved =
3606 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3607 if (IsUnresolved != WasUnresolved)
3608 Reader.PendingExceptionSpecUpdates.insert(
3609 {Canon, IsUnresolved ? PrevFD : FD});
3610
3611 // If we need to propagate a deduced return type along the redecl chain,
3612 // make a note of that so that we can do it later.
3613 bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3614 bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3615 if (IsUndeduced != WasUndeduced)
3616 Reader.PendingDeducedTypeUpdates.insert(
3617 {cast<FunctionDecl>(Canon),
3618 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3619 }
3620}
3621
3622} // namespace clang
3623
3624void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3625 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3625)
;
3626}
3627
3628/// Inherit the default template argument from \p From to \p To. Returns
3629/// \c false if there is no default template for \p From.
3630template <typename ParmDecl>
3631static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3632 Decl *ToD) {
3633 auto *To = cast<ParmDecl>(ToD);
3634 if (!From->hasDefaultArgument())
3635 return false;
3636 To->setInheritedDefaultArgument(Context, From);
3637 return true;
3638}
3639
3640static void inheritDefaultTemplateArguments(ASTContext &Context,
3641 TemplateDecl *From,
3642 TemplateDecl *To) {
3643 auto *FromTP = From->getTemplateParameters();
3644 auto *ToTP = To->getTemplateParameters();
3645 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?")((FromTP->size() == ToTP->size() && "merged mismatched templates?"
) ? static_cast<void> (0) : __assert_fail ("FromTP->size() == ToTP->size() && \"merged mismatched templates?\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3645, __PRETTY_FUNCTION__))
;
3646
3647 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3648 NamedDecl *FromParam = FromTP->getParam(I);
3649 NamedDecl *ToParam = ToTP->getParam(I);
3650
3651 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3652 inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3653 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3654 inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3655 else
3656 inheritDefaultTemplateArgument(
3657 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3658 }
3659}
3660
3661void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3662 Decl *Previous, Decl *Canon) {
3663 assert(D && Previous)((D && Previous) ? static_cast<void> (0) : __assert_fail
("D && Previous", "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3663, __PRETTY_FUNCTION__))
;
3664
3665 switch (D->getKind()) {
3666#define ABSTRACT_DECL(TYPE)
3667#define DECL(TYPE, BASE) \
3668 case Decl::TYPE: \
3669 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3670 break;
3671#include "clang/AST/DeclNodes.inc"
3672 }
3673
3674 // If the declaration was visible in one module, a redeclaration of it in
3675 // another module remains visible even if it wouldn't be visible by itself.
3676 //
3677 // FIXME: In this case, the declaration should only be visible if a module
3678 // that makes it visible has been imported.
3679 D->IdentifierNamespace |=
3680 Previous->IdentifierNamespace &
3681 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3682
3683 // If the declaration declares a template, it may inherit default arguments
3684 // from the previous declaration.
3685 if (auto *TD = dyn_cast<TemplateDecl>(D))
3686 inheritDefaultTemplateArguments(Reader.getContext(),
3687 cast<TemplateDecl>(Previous), TD);
3688
3689 // If any of the declaration in the chain contains an Inheritable attribute,
3690 // it needs to be added to all the declarations in the redeclarable chain.
3691 // FIXME: Only the logic of merging MSInheritableAttr is present, it should
3692 // be extended for all inheritable attributes.
3693 mergeInheritableAttributes(Reader, D, Previous);
3694}
3695
3696template<typename DeclT>
3697void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3698 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3699}
3700
3701void ASTDeclReader::attachLatestDeclImpl(...) {
3702 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3702)
;
3703}
3704
3705void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3706 assert(D && Latest)((D && Latest) ? static_cast<void> (0) : __assert_fail
("D && Latest", "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3706, __PRETTY_FUNCTION__))
;
3707
3708 switch (D->getKind()) {
3709#define ABSTRACT_DECL(TYPE)
3710#define DECL(TYPE, BASE) \
3711 case Decl::TYPE: \
3712 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3713 break;
3714#include "clang/AST/DeclNodes.inc"
3715 }
3716}
3717
3718template<typename DeclT>
3719void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3720 D->RedeclLink.markIncomplete();
3721}
3722
3723void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3724 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3724)
;
3725}
3726
3727void ASTReader::markIncompleteDeclChain(Decl *D) {
3728 switch (D->getKind()) {
3729#define ABSTRACT_DECL(TYPE)
3730#define DECL(TYPE, BASE) \
3731 case Decl::TYPE: \
3732 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3733 break;
3734#include "clang/AST/DeclNodes.inc"
3735 }
3736}
3737
3738/// Read the declaration at the given offset from the AST file.
3739Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3740 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3741 SourceLocation DeclLoc;
3742 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3743 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3744 // Keep track of where we are in the stream, then jump back there
3745 // after reading this declaration.
3746 SavedStreamPosition SavedPosition(DeclsCursor);
3747
3748 ReadingKindTracker ReadingKind(Read_Decl, *this);
3749
3750 // Note that we are loading a declaration record.
3751 Deserializing ADecl(this);
3752
3753 auto Fail = [](const char *what, llvm::Error &&Err) {
3754 llvm::report_fatal_error(Twine("ASTReader::readDeclRecord failed ") + what +
3755 ": " + toString(std::move(Err)));
3756 };
3757
3758 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(Loc.Offset))
3759 Fail("jumping", std::move(JumpFailed));
3760 ASTRecordReader Record(*this, *Loc.F);
3761 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3762 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3763 if (!MaybeCode)
3764 Fail("reading code", MaybeCode.takeError());
3765 unsigned Code = MaybeCode.get();
3766
3767 ASTContext &Context = getContext();
3768 Decl *D = nullptr;
3769 Expected<unsigned> MaybeDeclCode = Record.readRecord(DeclsCursor, Code);
3770 if (!MaybeDeclCode)
3771 llvm::report_fatal_error(
3772 "ASTReader::readDeclRecord failed reading decl code: " +
3773 toString(MaybeDeclCode.takeError()));
3774 switch ((DeclCode)MaybeDeclCode.get()) {
3775 case DECL_CONTEXT_LEXICAL:
3776 case DECL_CONTEXT_VISIBLE:
3777 llvm_unreachable("Record cannot be de-serialized with readDeclRecord")::llvm::llvm_unreachable_internal("Record cannot be de-serialized with readDeclRecord"
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3777)
;
3778 case DECL_TYPEDEF:
3779 D = TypedefDecl::CreateDeserialized(Context, ID);
3780 break;
3781 case DECL_TYPEALIAS:
3782 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3783 break;
3784 case DECL_ENUM:
3785 D = EnumDecl::CreateDeserialized(Context, ID);
3786 break;
3787 case DECL_RECORD:
3788 D = RecordDecl::CreateDeserialized(Context, ID);
3789 break;
3790 case DECL_ENUM_CONSTANT:
3791 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3792 break;
3793 case DECL_FUNCTION:
3794 D = FunctionDecl::CreateDeserialized(Context, ID);
3795 break;
3796 case DECL_LINKAGE_SPEC:
3797 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3798 break;
3799 case DECL_EXPORT:
3800 D = ExportDecl::CreateDeserialized(Context, ID);
3801 break;
3802 case DECL_LABEL:
3803 D = LabelDecl::CreateDeserialized(Context, ID);
3804 break;
3805 case DECL_NAMESPACE:
3806 D = NamespaceDecl::CreateDeserialized(Context, ID);
3807 break;
3808 case DECL_NAMESPACE_ALIAS:
3809 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3810 break;
3811 case DECL_USING:
3812 D = UsingDecl::CreateDeserialized(Context, ID);
3813 break;
3814 case DECL_USING_PACK:
3815 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3816 break;
3817 case DECL_USING_SHADOW:
3818 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3819 break;
3820 case DECL_CONSTRUCTOR_USING_SHADOW:
3821 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3822 break;
3823 case DECL_USING_DIRECTIVE:
3824 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3825 break;
3826 case DECL_UNRESOLVED_USING_VALUE:
3827 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3828 break;
3829 case DECL_UNRESOLVED_USING_TYPENAME:
3830 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3831 break;
3832 case DECL_CXX_RECORD:
3833 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3834 break;
3835 case DECL_CXX_DEDUCTION_GUIDE:
3836 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3837 break;
3838 case DECL_CXX_METHOD:
3839 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3840 break;
3841 case DECL_CXX_CONSTRUCTOR:
3842 D = CXXConstructorDecl::CreateDeserialized(Context, ID, Record.readInt());
3843 break;
3844 case DECL_CXX_DESTRUCTOR:
3845 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3846 break;
3847 case DECL_CXX_CONVERSION:
3848 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3849 break;
3850 case DECL_ACCESS_SPEC:
3851 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3852 break;
3853 case DECL_FRIEND:
3854 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3855 break;
3856 case DECL_FRIEND_TEMPLATE:
3857 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3858 break;
3859 case DECL_CLASS_TEMPLATE:
3860 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3861 break;
3862 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3863 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3864 break;
3865 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3866 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3867 break;
3868 case DECL_VAR_TEMPLATE:
3869 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3870 break;
3871 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3872 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3873 break;
3874 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3875 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3876 break;
3877 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3878 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3879 break;
3880 case DECL_FUNCTION_TEMPLATE:
3881 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3882 break;
3883 case DECL_TEMPLATE_TYPE_PARM: {
3884 bool HasTypeConstraint = Record.readInt();
3885 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID,
3886 HasTypeConstraint);
3887 break;
3888 }
3889 case DECL_NON_TYPE_TEMPLATE_PARM: {
3890 bool HasTypeConstraint = Record.readInt();
3891 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3892 HasTypeConstraint);
3893 break;
3894 }
3895 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK: {
3896 bool HasTypeConstraint = Record.readInt();
3897 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3898 Record.readInt(),
3899 HasTypeConstraint);
3900 break;
3901 }
3902 case DECL_TEMPLATE_TEMPLATE_PARM:
3903 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3904 break;
3905 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3906 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3907 Record.readInt());
3908 break;
3909 case DECL_TYPE_ALIAS_TEMPLATE:
3910 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3911 break;
3912 case DECL_CONCEPT:
3913 D = ConceptDecl::CreateDeserialized(Context, ID);
3914 break;
3915 case DECL_REQUIRES_EXPR_BODY:
3916 D = RequiresExprBodyDecl::CreateDeserialized(Context, ID);
3917 break;
3918 case DECL_STATIC_ASSERT:
3919 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3920 break;
3921 case DECL_OBJC_METHOD:
3922 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3923 break;
3924 case DECL_OBJC_INTERFACE:
3925 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3926 break;
3927 case DECL_OBJC_IVAR:
3928 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3929 break;
3930 case DECL_OBJC_PROTOCOL:
3931 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3932 break;
3933 case DECL_OBJC_AT_DEFS_FIELD:
3934 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3935 break;
3936 case DECL_OBJC_CATEGORY:
3937 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3938 break;
3939 case DECL_OBJC_CATEGORY_IMPL:
3940 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3941 break;
3942 case DECL_OBJC_IMPLEMENTATION:
3943 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3944 break;
3945 case DECL_OBJC_COMPATIBLE_ALIAS:
3946 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3947 break;
3948 case DECL_OBJC_PROPERTY:
3949 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3950 break;
3951 case DECL_OBJC_PROPERTY_IMPL:
3952 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3953 break;
3954 case DECL_FIELD:
3955 D = FieldDecl::CreateDeserialized(Context, ID);
3956 break;
3957 case DECL_INDIRECTFIELD:
3958 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3959 break;
3960 case DECL_VAR:
3961 D = VarDecl::CreateDeserialized(Context, ID);
3962 break;
3963 case DECL_IMPLICIT_PARAM:
3964 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3965 break;
3966 case DECL_PARM_VAR:
3967 D = ParmVarDecl::CreateDeserialized(Context, ID);
3968 break;
3969 case DECL_DECOMPOSITION:
3970 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3971 break;
3972 case DECL_BINDING:
3973 D = BindingDecl::CreateDeserialized(Context, ID);
3974 break;
3975 case DECL_FILE_SCOPE_ASM:
3976 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3977 break;
3978 case DECL_BLOCK:
3979 D = BlockDecl::CreateDeserialized(Context, ID);
3980 break;
3981 case DECL_MS_PROPERTY:
3982 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3983 break;
3984 case DECL_MS_GUID:
3985 D = MSGuidDecl::CreateDeserialized(Context, ID);
3986 break;
3987 case DECL_CAPTURED:
3988 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3989 break;
3990 case DECL_CXX_BASE_SPECIFIERS:
3991 Error("attempt to read a C++ base-specifier record as a declaration");
3992 return nullptr;
3993 case DECL_CXX_CTOR_INITIALIZERS:
3994 Error("attempt to read a C++ ctor initializer record as a declaration");
3995 return nullptr;
3996 case DECL_IMPORT:
3997 // Note: last entry of the ImportDecl record is the number of stored source
3998 // locations.
3999 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
4000 break;
4001 case DECL_OMP_THREADPRIVATE: {
4002 Record.skipInts(1);
4003 unsigned NumChildren = Record.readInt();
4004 Record.skipInts(1);
4005 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, NumChildren);
4006 break;
4007 }
4008 case DECL_OMP_ALLOCATE: {
4009 unsigned NumClauses = Record.readInt();
4010 unsigned NumVars = Record.readInt();
4011 Record.skipInts(1);
4012 D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
4013 break;
4014 }
4015 case DECL_OMP_REQUIRES: {
4016 unsigned NumClauses = Record.readInt();
4017 Record.skipInts(2);
4018 D = OMPRequiresDecl::CreateDeserialized(Context, ID, NumClauses);
4019 break;
4020 }
4021 case DECL_OMP_DECLARE_REDUCTION:
4022 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
4023 break;
4024 case DECL_OMP_DECLARE_MAPPER: {
4025 unsigned NumClauses = Record.readInt();
4026 Record.skipInts(2);
4027 D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, NumClauses);
4028 break;
4029 }
4030 case DECL_OMP_CAPTUREDEXPR:
4031 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
4032 break;
4033 case DECL_PRAGMA_COMMENT:
4034 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
4035 break;
4036 case DECL_PRAGMA_DETECT_MISMATCH:
4037 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
4038 Record.readInt());
4039 break;
4040 case DECL_EMPTY:
4041 D = EmptyDecl::CreateDeserialized(Context, ID);
4042 break;
4043 case DECL_LIFETIME_EXTENDED_TEMPORARY:
4044 D = LifetimeExtendedTemporaryDecl::CreateDeserialized(Context, ID);
4045 break;
4046 case DECL_OBJC_TYPE_PARAM:
4047 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
4048 break;
4049 }
4050
4051 assert(D && "Unknown declaration reading AST file")((D && "Unknown declaration reading AST file") ? static_cast
<void> (0) : __assert_fail ("D && \"Unknown declaration reading AST file\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4051, __PRETTY_FUNCTION__))
;
4052 LoadedDecl(Index, D);
4053 // Set the DeclContext before doing any deserialization, to make sure internal
4054 // calls to Decl::getASTContext() by Decl's methods will find the
4055 // TranslationUnitDecl without crashing.
4056 D->setDeclContext(Context.getTranslationUnitDecl());
4057 Reader.Visit(D);
4058
4059 // If this declaration is also a declaration context, get the
4060 // offsets for its tables of lexical and visible declarations.
4061 if (auto *DC = dyn_cast<DeclContext>(D)) {
4062 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
4063 if (Offsets.first &&
4064 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
4065 return nullptr;
4066 if (Offsets.second &&
4067 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
4068 return nullptr;
4069 }
4070 assert(Record.getIdx() == Record.size())((Record.getIdx() == Record.size()) ? static_cast<void>
(0) : __assert_fail ("Record.getIdx() == Record.size()", "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4070, __PRETTY_FUNCTION__))
;
4071
4072 // Load any relevant update records.
4073 PendingUpdateRecords.push_back(
4074 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
4075
4076 // Load the categories after recursive loading is finished.
4077 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
4078 // If we already have a definition when deserializing the ObjCInterfaceDecl,
4079 // we put the Decl in PendingDefinitions so we can pull the categories here.
4080 if (Class->isThisDeclarationADefinition() ||
4081 PendingDefinitions.count(Class))
4082 loadObjCCategories(ID, Class);
4083
4084 // If we have deserialized a declaration that has a definition the
4085 // AST consumer might need to know about, queue it.
4086 // We don't pass it to the consumer immediately because we may be in recursive
4087 // loading, and some declarations may still be initializing.
4088 PotentiallyInterestingDecls.push_back(
4089 InterestingDecl(D, Reader.hasPendingBody()));
4090
4091 return D;
4092}
4093
4094void ASTReader::PassInterestingDeclsToConsumer() {
4095 assert(Consumer)((Consumer) ? static_cast<void> (0) : __assert_fail ("Consumer"
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4095, __PRETTY_FUNCTION__))
;
4096
4097 if (PassingDeclsToConsumer)
4098 return;
4099
4100 // Guard variable to avoid recursively redoing the process of passing
4101 // decls to consumer.
4102 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
4103 true);
4104
4105 // Ensure that we've loaded all potentially-interesting declarations
4106 // that need to be eagerly loaded.
4107 for (auto ID : EagerlyDeserializedDecls)
4108 GetDecl(ID);
4109 EagerlyDeserializedDecls.clear();
4110
4111 while (!PotentiallyInterestingDecls.empty()) {
4112 InterestingDecl D = PotentiallyInterestingDecls.front();
4113 PotentiallyInterestingDecls.pop_front();
4114 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
4115 PassInterestingDeclToConsumer(D.getDecl());
4116 }
4117}
4118
4119void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4120 // The declaration may have been modified by files later in the chain.
4121 // If this is the case, read the record containing the updates from each file
4122 // and pass it to ASTDeclReader to make the modifications.
4123 serialization::GlobalDeclID ID = Record.ID;
4124 Decl *D = Record.D;
4125 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4126 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
4127
4128 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
4129
4130 if (UpdI != DeclUpdateOffsets.end()) {
4131 auto UpdateOffsets = std::move(UpdI->second);
4132 DeclUpdateOffsets.erase(UpdI);
4133
4134 // Check if this decl was interesting to the consumer. If we just loaded
4135 // the declaration, then we know it was interesting and we skip the call
4136 // to isConsumerInterestedIn because it is unsafe to call in the
4137 // current ASTReader state.
4138 bool WasInteresting =
4139 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
4140 for (auto &FileAndOffset : UpdateOffsets) {
4141 ModuleFile *F = FileAndOffset.first;
4142 uint64_t Offset = FileAndOffset.second;
4143 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4144 SavedStreamPosition SavedPosition(Cursor);
4145 if (llvm::Error JumpFailed = Cursor.JumpToBit(Offset))
4146 // FIXME don't do a fatal error.
4147 llvm::report_fatal_error(
4148 "ASTReader::loadDeclUpdateRecords failed jumping: " +
4149 toString(std::move(JumpFailed)));
4150 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4151 if (!MaybeCode)
4152 llvm::report_fatal_error(
4153 "ASTReader::loadDeclUpdateRecords failed reading code: " +
4154 toString(MaybeCode.takeError()));
4155 unsigned Code = MaybeCode.get();
4156 ASTRecordReader Record(*this, *F);
4157 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, Code))
4158 assert(MaybeRecCode.get() == DECL_UPDATES &&((MaybeRecCode.get() == DECL_UPDATES && "Expected DECL_UPDATES record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4159, __PRETTY_FUNCTION__))
4159 "Expected DECL_UPDATES record!")((MaybeRecCode.get() == DECL_UPDATES && "Expected DECL_UPDATES record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4159, __PRETTY_FUNCTION__))
;
4160 else
4161 llvm::report_fatal_error(
4162 "ASTReader::loadDeclUpdateRecords failed reading rec code: " +
4163 toString(MaybeCode.takeError()));
4164
4165 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4166 SourceLocation());
4167 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4168
4169 // We might have made this declaration interesting. If so, remember that
4170 // we need to hand it off to the consumer.
4171 if (!WasInteresting &&
4172 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4173 PotentiallyInterestingDecls.push_back(
4174 InterestingDecl(D, Reader.hasPendingBody()));
4175 WasInteresting = true;
4176 }
4177 }
4178 }
4179 // Add the lazy specializations to the template.
4180 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||(((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl
>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl
>(D)) && "Must not have pending specializations") ?
static_cast<void> (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4182, __PRETTY_FUNCTION__))
4181 isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&(((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl
>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl
>(D)) && "Must not have pending specializations") ?
static_cast<void> (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4182, __PRETTY_FUNCTION__))
4182 "Must not have pending specializations")(((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl
>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl
>(D)) && "Must not have pending specializations") ?
static_cast<void> (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4182, __PRETTY_FUNCTION__))
;
4183 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4184 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4185 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4186 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4187 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4188 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4189 PendingLazySpecializationIDs.clear();
4190
4191 // Load the pending visible updates for this decl context, if it has any.
4192 auto I = PendingVisibleUpdates.find(ID);
4193 if (I != PendingVisibleUpdates.end()) {
4194 auto VisibleUpdates = std::move(I->second);
4195 PendingVisibleUpdates.erase(I);
4196
4197 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4198 for (const auto &Update : VisibleUpdates)
4199 Lookups[DC].Table.add(
4200 Update.Mod, Update.Data,
4201 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4202 DC->setHasExternalVisibleStorage(true);
4203 }
4204}
4205
4206void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4207 // Attach FirstLocal to the end of the decl chain.
4208 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4209 if (FirstLocal != CanonDecl) {
4210 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4211 ASTDeclReader::attachPreviousDecl(
4212 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4213 CanonDecl);
4214 }
4215
4216 if (!LocalOffset) {
4217 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4218 return;
4219 }
4220
4221 // Load the list of other redeclarations from this module file.
4222 ModuleFile *M = getOwningModuleFile(FirstLocal);
4223 assert(M && "imported decl from no module file")((M && "imported decl from no module file") ? static_cast
<void> (0) : __assert_fail ("M && \"imported decl from no module file\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4223, __PRETTY_FUNCTION__))
;
4224
4225 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4226 SavedStreamPosition SavedPosition(Cursor);
4227 if (llvm::Error JumpFailed = Cursor.JumpToBit(LocalOffset))
4228 llvm::report_fatal_error(
4229 "ASTReader::loadPendingDeclChain failed jumping: " +
4230 toString(std::move(JumpFailed)));
4231
4232 RecordData Record;
4233 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4234 if (!MaybeCode)
4235 llvm::report_fatal_error(
4236 "ASTReader::loadPendingDeclChain failed reading code: " +
4237 toString(MaybeCode.takeError()));
4238 unsigned Code = MaybeCode.get();
4239 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record))
4240 assert(MaybeRecCode.get() == LOCAL_REDECLARATIONS &&((MaybeRecCode.get() == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4241, __PRETTY_FUNCTION__))
4241 "expected LOCAL_REDECLARATIONS record!")((MaybeRecCode.get() == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4241, __PRETTY_FUNCTION__))
;
4242 else
4243 llvm::report_fatal_error(
4244 "ASTReader::loadPendingDeclChain failed reading rec code: " +
4245 toString(MaybeCode.takeError()));
4246
4247 // FIXME: We have several different dispatches on decl kind here; maybe
4248 // we should instead generate one loop per kind and dispatch up-front?
4249 Decl *MostRecent = FirstLocal;
4250 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4251 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4252 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4253 MostRecent = D;
4254 }
4255 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4256}
4257
4258namespace {
4259
4260 /// Given an ObjC interface, goes through the modules and links to the
4261 /// interface all the categories for it.
4262 class ObjCCategoriesVisitor {
4263 ASTReader &Reader;
4264 ObjCInterfaceDecl *Interface;
4265 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4266 ObjCCategoryDecl *Tail = nullptr;
4267 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4268 serialization::GlobalDeclID InterfaceID;
4269 unsigned PreviousGeneration;
4270
4271 void add(ObjCCategoryDecl *Cat) {
4272 // Only process each category once.
4273 if (!Deserialized.erase(Cat))
4274 return;
4275
4276 // Check for duplicate categories.
4277 if (Cat->getDeclName()) {
4278 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4279 if (Existing &&
4280 Reader.getOwningModuleFile(Existing)
4281 != Reader.getOwningModuleFile(Cat)) {
4282 // FIXME: We should not warn for duplicates in diamond:
4283 //
4284 // MT //
4285 // / \ //
4286 // ML MR //
4287 // \ / //
4288 // MB //
4289 //
4290 // If there are duplicates in ML/MR, there will be warning when
4291 // creating MB *and* when importing MB. We should not warn when
4292 // importing.
4293 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4294 << Interface->getDeclName() << Cat->getDeclName();
4295 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4296 } else if (!Existing) {
4297 // Record this category.
4298 Existing = Cat;
4299 }
4300 }
4301
4302 // Add this category to the end of the chain.
4303 if (Tail)
4304 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4305 else
4306 Interface->setCategoryListRaw(Cat);
4307 Tail = Cat;
4308 }
4309
4310 public:
4311 ObjCCategoriesVisitor(ASTReader &Reader,
4312 ObjCInterfaceDecl *Interface,
4313 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4314 serialization::GlobalDeclID InterfaceID,
4315 unsigned PreviousGeneration)
4316 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4317 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4318 // Populate the name -> category map with the set of known categories.
4319 for (auto *Cat : Interface->known_categories()) {
4320 if (Cat->getDeclName())
4321 NameCategoryMap[Cat->getDeclName()] = Cat;
4322
4323 // Keep track of the tail of the category list.
4324 Tail = Cat;
4325 }
4326 }
4327
4328 bool operator()(ModuleFile &M) {
4329 // If we've loaded all of the category information we care about from
4330 // this module file, we're done.
4331 if (M.Generation <= PreviousGeneration)
4332 return true;
4333
4334 // Map global ID of the definition down to the local ID used in this
4335 // module file. If there is no such mapping, we'll find nothing here
4336 // (or in any module it imports).
4337 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4338 if (!LocalID)
4339 return true;
4340
4341 // Perform a binary search to find the local redeclarations for this
4342 // declaration (if any).
4343 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4344 const ObjCCategoriesInfo *Result
4345 = std::lower_bound(M.ObjCCategoriesMap,
4346 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4347 Compare);
4348 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4349 Result->DefinitionID != LocalID) {
4350 // We didn't find anything. If the class definition is in this module
4351 // file, then the module files it depends on cannot have any categories,
4352 // so suppress further lookup.
4353 return Reader.isDeclIDFromModule(InterfaceID, M);
4354 }
4355
4356 // We found something. Dig out all of the categories.
4357 unsigned Offset = Result->Offset;
4358 unsigned N = M.ObjCCategories[Offset];
4359 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4360 for (unsigned I = 0; I != N; ++I)
4361 add(cast_or_null<ObjCCategoryDecl>(
4362 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4363 return true;
4364 }
4365 };
4366
4367} // namespace
4368
4369void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4370 ObjCInterfaceDecl *D,
4371 unsigned PreviousGeneration) {
4372 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4373 PreviousGeneration);
4374 ModuleMgr.visit(Visitor);
4375}
4376
4377template<typename DeclT, typename Fn>
4378static void forAllLaterRedecls(DeclT *D, Fn F) {
4379 F(D);
4380
4381 // Check whether we've already merged D into its redeclaration chain.
4382 // MostRecent may or may not be nullptr if D has not been merged. If
4383 // not, walk the merged redecl chain and see if it's there.
4384 auto *MostRecent = D->getMostRecentDecl();
4385 bool Found = false;
4386 for (auto *Redecl = MostRecent; Redecl && !Found;
4387 Redecl = Redecl->getPreviousDecl())
4388 Found = (Redecl == D);
4389
4390 // If this declaration is merged, apply the functor to all later decls.
4391 if (Found) {
4392 for (auto *Redecl = MostRecent; Redecl != D;
4393 Redecl = Redecl->getPreviousDecl())
4394 F(Redecl);
4395 }
4396}
4397
4398void ASTDeclReader::UpdateDecl(Decl *D,
4399 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4400 while (Record.getIdx() < Record.size()) {
4401 switch ((DeclUpdateKind)Record.readInt()) {
4402 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4403 auto *RD = cast<CXXRecordDecl>(D);
4404 // FIXME: If we also have an update record for instantiating the
4405 // definition of D, we need that to happen before we get here.
4406 Decl *MD = Record.readDecl();
4407 assert(MD && "couldn't read decl from update record")((MD && "couldn't read decl from update record") ? static_cast
<void> (0) : __assert_fail ("MD && \"couldn't read decl from update record\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4407, __PRETTY_FUNCTION__))
;
4408 // FIXME: We should call addHiddenDecl instead, to add the member
4409 // to its DeclContext.
4410 RD->addedMember(MD);
4411 break;
4412 }
4413
4414 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4415 // It will be added to the template's lazy specialization set.
4416 PendingLazySpecializationIDs.push_back(readDeclID());
4417 break;
4418
4419 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4420 auto *Anon = readDeclAs<NamespaceDecl>();
4421
4422 // Each module has its own anonymous namespace, which is disjoint from
4423 // any other module's anonymous namespaces, so don't attach the anonymous
4424 // namespace at all.
4425 if (!Record.isModule()) {
4426 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4427 TU->setAnonymousNamespace(Anon);
4428 else
4429 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4430 }
4431 break;
4432 }
4433
4434 case UPD_CXX_ADDED_VAR_DEFINITION: {
4435 auto *VD = cast<VarDecl>(D);
4436 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4437 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4438 uint64_t Val = Record.readInt();
4439 if (Val && !VD->getInit()) {
4440 VD->setInit(Record.readExpr());
4441 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4442 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4443 Eval->CheckedICE = true;
4444 Eval->IsICE = Val == 3;
4445 }
4446 }
4447 break;
4448 }
4449
4450 case UPD_CXX_POINT_OF_INSTANTIATION: {
4451 SourceLocation POI = Record.readSourceLocation();
4452 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4453 VTSD->setPointOfInstantiation(POI);
4454 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4455 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4456 } else {
4457 auto *FD = cast<FunctionDecl>(D);
4458 if (auto *FTSInfo = FD->TemplateOrSpecialization
4459 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4460 FTSInfo->setPointOfInstantiation(POI);
4461 else
4462 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4463 ->setPointOfInstantiation(POI);
4464 }
4465 break;
4466 }
4467
4468 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4469 auto *Param = cast<ParmVarDecl>(D);
4470
4471 // We have to read the default argument regardless of whether we use it
4472 // so that hypothetical further update records aren't messed up.
4473 // TODO: Add a function to skip over the next expr record.
4474 auto *DefaultArg = Record.readExpr();
4475
4476 // Only apply the update if the parameter still has an uninstantiated
4477 // default argument.
4478 if (Param->hasUninstantiatedDefaultArg())
4479 Param->setDefaultArg(DefaultArg);
4480 break;
4481 }
4482
4483 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4484 auto *FD = cast<FieldDecl>(D);
4485 auto *DefaultInit = Record.readExpr();
4486
4487 // Only apply the update if the field still has an uninstantiated
4488 // default member initializer.
4489 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4490 if (DefaultInit)
4491 FD->setInClassInitializer(DefaultInit);
4492 else
4493 // Instantiation failed. We can get here if we serialized an AST for
4494 // an invalid program.
4495 FD->removeInClassInitializer();
4496 }
4497 break;
4498 }
4499
4500 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4501 auto *FD = cast<FunctionDecl>(D);
4502 if (Reader.PendingBodies[FD]) {
4503 // FIXME: Maybe check for ODR violations.
4504 // It's safe to stop now because this update record is always last.
4505 return;
4506 }
4507
4508 if (Record.readInt()) {
4509 // Maintain AST consistency: any later redeclarations of this function
4510 // are inline if this one is. (We might have merged another declaration
4511 // into this one.)
4512 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4513 FD->setImplicitlyInline();
4514 });
4515 }
4516 FD->setInnerLocStart(readSourceLocation());
4517 ReadFunctionDefinition(FD);
4518 assert(Record.getIdx() == Record.size() && "lazy body must be last")((Record.getIdx() == Record.size() && "lazy body must be last"
) ? static_cast<void> (0) : __assert_fail ("Record.getIdx() == Record.size() && \"lazy body must be last\""
, "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4518, __PRETTY_FUNCTION__))
;
4519 break;
4520 }
4521
4522 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4523 auto *RD = cast<CXXRecordDecl>(D);
4524 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4525 bool HadRealDefinition =
4526 OldDD && (OldDD->Definition != RD ||
4527 !Reader.PendingFakeDefinitionData.count(OldDD));
4528 RD->setParamDestroyedInCallee(Record.readInt());
4529 RD->setArgPassingRestrictions(
4530 (RecordDecl::ArgPassingKind)Record.readInt());
4531 ReadCXXRecordDefinition(RD, /*Update*/true);
4532
4533 // Visible update is handled separately.
4534 uint64_t LexicalOffset = ReadLocalOffset();
4535 if (!HadRealDefinition && LexicalOffset) {
4536 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4537 Reader.PendingFakeDefinitionData.erase(OldDD);
4538 }
4539
4540 auto TSK = (TemplateSpecializationKind)Record.readInt();
4541 SourceLocation POI = readSourceLocation();
4542 if (MemberSpecializationInfo *MSInfo =
4543 RD->getMemberSpecializationInfo()) {
4544 MSInfo->setTemplateSpecializationKind(TSK);
4545 MSInfo->setPointOfInstantiation(POI);
4546 } else {
4547 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4548 Spec->setTemplateSpecializationKind(TSK);
4549 Spec->setPointOfInstantiation(POI);
4550
4551 if (Record.readInt()) {
4552 auto *PartialSpec =
4553 readDeclAs<ClassTemplatePartialSpecializationDecl>();
4554 SmallVector<TemplateArgument, 8> TemplArgs;
4555 Record.readTemplateArgumentList(TemplArgs);
4556 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4557 Reader.getContext(), TemplArgs);
4558
4559 // FIXME: If we already have a partial specialization set,
4560 // check that it matches.
4561 if (!Spec->getSpecializedTemplateOrPartial()
4562 .is<ClassTemplatePartialSpecializationDecl *>())
4563 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4564 }
4565 }
4566
4567 RD->setTagKind((TagTypeKind)Record.readInt());
4568 RD->setLocation(readSourceLocation());
4569 RD->setLocStart(readSourceLocation());
4570 RD->setBraceRange(readSourceRange());
4571
4572 if (Record.readInt()) {
4573 AttrVec Attrs;
4574 Record.readAttributes(Attrs);
4575 // If the declaration already has attributes, we assume that some other
4576 // AST file already loaded them.
4577 if (!D->hasAttrs())
4578 D->setAttrsImpl(Attrs, Reader.getContext());
4579 }
4580 break;
4581 }
4582
4583 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4584 // Set the 'operator delete' directly to avoid emitting another update
4585 // record.
4586 auto *Del = readDeclAs<FunctionDecl>();
4587 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4588 auto *ThisArg = Record.readExpr();
4589 // FIXME: Check consistency if we have an old and new operator delete.
4590 if (!First->OperatorDelete) {
4591 First->OperatorDelete = Del;
4592 First->OperatorDeleteThisArg = ThisArg;
4593 }
4594 break;
4595 }
4596
4597 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4598 SmallVector<QualType, 8> ExceptionStorage;
4599 auto ESI = Record.readExceptionSpecInfo(ExceptionStorage);
4600
4601 // Update this declaration's exception specification, if needed.
4602 auto *FD = cast<FunctionDecl>(D);
4603 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4604 // FIXME: If the exception specification is already present, check that it
4605 // matches.
4606 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4607 FD->setType(Reader.getContext().getFunctionType(
4608 FPT->getReturnType(), FPT->getParamTypes(),
4609 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4610
4611 // When we get to the end of deserializing, see if there are other decls
4612 // that we need to propagate this exception specification onto.
4613 Reader.PendingExceptionSpecUpdates.insert(
4614 std::make_pair(FD->getCanonicalDecl(), FD));
4615 }
4616 break;
4617 }
4618
4619 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4620 auto *FD = cast<FunctionDecl>(D);
4621 QualType DeducedResultType = Record.readType();
4622 Reader.PendingDeducedTypeUpdates.insert(
4623 {FD->getCanonicalDecl(), DeducedResultType});
4624 break;
4625 }
4626
4627 case UPD_DECL_MARKED_USED:
4628 // Maintain AST consistency: any later redeclarations are used too.
4629 D->markUsed(Reader.getContext());
4630 break;
4631
4632 case UPD_MANGLING_NUMBER:
4633 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4634 Record.readInt());
4635 break;
4636
4637 case UPD_STATIC_LOCAL_NUMBER:
4638 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4639 Record.readInt());
4640 break;
4641
4642 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4643 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
4644 Reader.getContext(), readSourceRange(),
4645 AttributeCommonInfo::AS_Pragma));
4646 break;
4647
4648 case UPD_DECL_MARKED_OPENMP_ALLOCATE: {
4649 auto AllocatorKind =
4650 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4651 Expr *Allocator = Record.readExpr();
4652 SourceRange SR = readSourceRange();
4653 D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4654 Reader.getContext(), AllocatorKind, Allocator, SR,
4655 AttributeCommonInfo::AS_Pragma));
4656 break;
4657 }
4658
4659 case UPD_DECL_EXPORTED: {
4660 unsigned SubmoduleID = readSubmoduleID();
4661 auto *Exported = cast<NamedDecl>(D);
4662 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4663 Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4664 Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4665 break;
4666 }
4667
4668 case UPD_DECL_MARKED_OPENMP_DECLARETARGET: {
4669 auto MapType = Record.readEnum<OMPDeclareTargetDeclAttr::MapTypeTy>();
4670 auto DevType = Record.readEnum<OMPDeclareTargetDeclAttr::DevTypeTy>();
4671 unsigned Level = Record.readInt();
4672 D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4673 Reader.getContext(), MapType, DevType, Level, readSourceRange(),
4674 AttributeCommonInfo::AS_Pragma));
4675 break;
4676 }
4677
4678 case UPD_ADDED_ATTR_TO_RECORD:
4679 AttrVec Attrs;
4680 Record.readAttributes(Attrs);
4681 assert(Attrs.size() == 1)((Attrs.size() == 1) ? static_cast<void> (0) : __assert_fail
("Attrs.size() == 1", "/build/llvm-toolchain-snapshot-12~++20200917111122+b03c2b8395b/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4681, __PRETTY_FUNCTION__))
;
4682 D->addAttr(Attrs[0]);
4683 break;
4684 }
4685 }
4686}