Bug Summary

File:clang/lib/Serialization/ASTReaderDecl.cpp
Warning:line 475, 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 _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/include -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/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~++20201129111111+e987fbdd85d/build-llvm/tools/clang/lib/Serialization -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d=. -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-2020-11-29-190409-37574-1 -x c++ /build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/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~++20201129111111+e987fbdd85d/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 VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D);
373 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
374 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
375 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
376 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
377 void VisitParmVarDecl(ParmVarDecl *PD);
378 void VisitDecompositionDecl(DecompositionDecl *DD);
379 void VisitBindingDecl(BindingDecl *BD);
380 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
381 DeclID VisitTemplateDecl(TemplateDecl *D);
382 void VisitConceptDecl(ConceptDecl *D);
383 void VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D);
384 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
385 void VisitClassTemplateDecl(ClassTemplateDecl *D);
386 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
387 void VisitVarTemplateDecl(VarTemplateDecl *D);
388 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
389 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
390 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
391 void VisitUsingDecl(UsingDecl *D);
392 void VisitUsingPackDecl(UsingPackDecl *D);
393 void VisitUsingShadowDecl(UsingShadowDecl *D);
394 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
395 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
396 void VisitExportDecl(ExportDecl *D);
397 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
398 void VisitImportDecl(ImportDecl *D);
399 void VisitAccessSpecDecl(AccessSpecDecl *D);
400 void VisitFriendDecl(FriendDecl *D);
401 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
402 void VisitStaticAssertDecl(StaticAssertDecl *D);
403 void VisitBlockDecl(BlockDecl *BD);
404 void VisitCapturedDecl(CapturedDecl *CD);
405 void VisitEmptyDecl(EmptyDecl *D);
406 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
407
408 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
409
410 template<typename T>
411 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
412
413 template<typename T>
414 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
415 DeclID TemplatePatternID = 0);
416
417 template<typename T>
418 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
419 RedeclarableResult &Redecl,
420 DeclID TemplatePatternID = 0);
421
422 template<typename T>
423 void mergeMergeable(Mergeable<T> *D);
424
425 void mergeMergeable(LifetimeExtendedTemporaryDecl *D);
426
427 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
428 RedeclarableTemplateDecl *Existing,
429 DeclID DsID, bool IsKeyDecl);
430
431 ObjCTypeParamList *ReadObjCTypeParamList();
432
433 // FIXME: Reorder according to DeclNodes.td?
434 void VisitObjCMethodDecl(ObjCMethodDecl *D);
435 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
436 void VisitObjCContainerDecl(ObjCContainerDecl *D);
437 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
438 void VisitObjCIvarDecl(ObjCIvarDecl *D);
439 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
440 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
441 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
442 void VisitObjCImplDecl(ObjCImplDecl *D);
443 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
444 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
445 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
446 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
447 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
448 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
449 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
450 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
451 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
452 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
453 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
454 };
455
456} // namespace clang
457
458namespace {
459
460/// Iterator over the redeclarations of a declaration that have already
461/// been merged into the same redeclaration chain.
462template<typename DeclT>
463class MergedRedeclIterator {
464 DeclT *Start;
465 DeclT *Canonical = nullptr;
466 DeclT *Current = nullptr;
467
468public:
469 MergedRedeclIterator() = default;
470 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
471
472 DeclT *operator*() { return Current; }
473
474 MergedRedeclIterator &operator++() {
475 if (Current->isFirstDecl()) {
24
Taking false branch
33
Called C++ object pointer is null
476 Canonical = Current;
477 Current = Current->getMostRecentDecl();
478 } else
479 Current = Current->getPreviousDecl();
480
481 // If we started in the merged portion, we'll reach our start position
482 // eventually. Otherwise, we'll never reach it, but the second declaration
483 // we reached was the canonical declaration, so stop when we see that one
484 // again.
485 if (Current == Start || Current == Canonical)
25
Assuming field 'Current' is equal to field 'Start'
486 Current = nullptr;
26
Null pointer value stored to '__begin1.Current'
487 return *this;
488 }
489
490 friend bool operator!=(const MergedRedeclIterator &A,
491 const MergedRedeclIterator &B) {
492 return A.Current != B.Current;
493 }
494};
495
496} // namespace
497
498template <typename DeclT>
499static llvm::iterator_range<MergedRedeclIterator<DeclT>>
500merged_redecls(DeclT *D) {
501 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
502 MergedRedeclIterator<DeclT>());
503}
504
505uint64_t ASTDeclReader::GetCurrentCursorOffset() {
506 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
507}
508
509void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
510 if (Record.readInt()) {
511 Reader.DefinitionSource[FD] =
512 Loc.F->Kind == ModuleKind::MK_MainFile ||
513 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
514 }
515 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
516 CD->setNumCtorInitializers(Record.readInt());
517 if (CD->getNumCtorInitializers())
518 CD->CtorInitializers = ReadGlobalOffset();
519 }
520 // Store the offset of the body so we can lazily load it later.
521 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
522 HasPendingBody = true;
523}
524
525void ASTDeclReader::Visit(Decl *D) {
526 DeclVisitor<ASTDeclReader, void>::Visit(D);
527
528 // At this point we have deserialized and merged the decl and it is safe to
529 // update its canonical decl to signal that the entire entity is used.
530 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
531 IsDeclMarkedUsed = false;
532
533 if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
534 if (auto *TInfo = DD->getTypeSourceInfo())
535 Record.readTypeLoc(TInfo->getTypeLoc());
536 }
537
538 if (auto *TD = dyn_cast<TypeDecl>(D)) {
539 // We have a fully initialized TypeDecl. Read its type now.
540 TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
541
542 // If this is a tag declaration with a typedef name for linkage, it's safe
543 // to load that typedef now.
544 if (NamedDeclForTagDecl)
545 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
546 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
547 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
548 // if we have a fully initialized TypeDecl, we can safely read its type now.
549 ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
550 } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
551 // FunctionDecl's body was written last after all other Stmts/Exprs.
552 // We only read it if FD doesn't already have a body (e.g., from another
553 // module).
554 // FIXME: Can we diagnose ODR violations somehow?
555 if (Record.readInt())
556 ReadFunctionDefinition(FD);
557 }
558}
559
560void ASTDeclReader::VisitDecl(Decl *D) {
561 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
562 isa<ParmVarDecl>(D) || isa<ObjCTypeParamDecl>(D)) {
563 // We don't want to deserialize the DeclContext of a template
564 // parameter or of a parameter of a function template immediately. These
565 // entities might be used in the formulation of its DeclContext (for
566 // example, a function parameter can be used in decltype() in trailing
567 // return type of the function). Use the translation unit DeclContext as a
568 // placeholder.
569 GlobalDeclID SemaDCIDForTemplateParmDecl = readDeclID();
570 GlobalDeclID LexicalDCIDForTemplateParmDecl = readDeclID();
571 if (!LexicalDCIDForTemplateParmDecl)
572 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
573 Reader.addPendingDeclContextInfo(D,
574 SemaDCIDForTemplateParmDecl,
575 LexicalDCIDForTemplateParmDecl);
576 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
577 } else {
578 auto *SemaDC = readDeclAs<DeclContext>();
579 auto *LexicalDC = readDeclAs<DeclContext>();
580 if (!LexicalDC)
581 LexicalDC = SemaDC;
582 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
583 // Avoid calling setLexicalDeclContext() directly because it uses
584 // Decl::getASTContext() internally which is unsafe during derialization.
585 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
586 Reader.getContext());
587 }
588 D->setLocation(ThisDeclLoc);
589 D->InvalidDecl = Record.readInt();
590 if (Record.readInt()) { // hasAttrs
591 AttrVec Attrs;
592 Record.readAttributes(Attrs);
593 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
594 // internally which is unsafe during derialization.
595 D->setAttrsImpl(Attrs, Reader.getContext());
596 }
597 D->setImplicit(Record.readInt());
598 D->Used = Record.readInt();
599 IsDeclMarkedUsed |= D->Used;
600 D->setReferenced(Record.readInt());
601 D->setTopLevelDeclInObjCContainer(Record.readInt());
602 D->setAccess((AccessSpecifier)Record.readInt());
603 D->FromASTFile = true;
604 bool ModulePrivate = Record.readInt();
605
606 // Determine whether this declaration is part of a (sub)module. If so, it
607 // may not yet be visible.
608 if (unsigned SubmoduleID = readSubmoduleID()) {
609 // Store the owning submodule ID in the declaration.
610 D->setModuleOwnershipKind(
611 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
612 : Decl::ModuleOwnershipKind::VisibleWhenImported);
613 D->setOwningModuleID(SubmoduleID);
614
615 if (ModulePrivate) {
616 // Module-private declarations are never visible, so there is no work to
617 // do.
618 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
619 // If local visibility is being tracked, this declaration will become
620 // hidden and visible as the owning module does.
621 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
622 // Mark the declaration as visible when its owning module becomes visible.
623 if (Owner->NameVisibility == Module::AllVisible)
624 D->setVisibleDespiteOwningModule();
625 else
626 Reader.HiddenNamesMap[Owner].push_back(D);
627 }
628 } else if (ModulePrivate) {
629 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
630 }
631}
632
633void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
634 VisitDecl(D);
635 D->setLocation(readSourceLocation());
636 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
637 std::string Arg = readString();
638 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
639 D->getTrailingObjects<char>()[Arg.size()] = '\0';
640}
641
642void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
643 VisitDecl(D);
644 D->setLocation(readSourceLocation());
645 std::string Name = readString();
646 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
647 D->getTrailingObjects<char>()[Name.size()] = '\0';
648
649 D->ValueStart = Name.size() + 1;
650 std::string Value = readString();
651 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
652 Value.size());
653 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
654}
655
656void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
657 llvm_unreachable("Translation units are not serialized")::llvm::llvm_unreachable_internal("Translation units are not serialized"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 657)
;
658}
659
660void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
661 VisitDecl(ND);
662 ND->setDeclName(Record.readDeclarationName());
663 AnonymousDeclNumber = Record.readInt();
664}
665
666void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
667 VisitNamedDecl(TD);
668 TD->setLocStart(readSourceLocation());
669 // Delay type reading until after we have fully initialized the decl.
670 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
671}
672
673ASTDeclReader::RedeclarableResult
674ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
675 RedeclarableResult Redecl = VisitRedeclarable(TD);
676 VisitTypeDecl(TD);
677 TypeSourceInfo *TInfo = readTypeSourceInfo();
678 if (Record.readInt()) { // isModed
679 QualType modedT = Record.readType();
680 TD->setModedTypeSourceInfo(TInfo, modedT);
681 } else
682 TD->setTypeSourceInfo(TInfo);
683 // Read and discard the declaration for which this is a typedef name for
684 // linkage, if it exists. We cannot rely on our type to pull in this decl,
685 // because it might have been merged with a type from another module and
686 // thus might not refer to our version of the declaration.
687 readDecl();
688 return Redecl;
689}
690
691void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
692 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
693 mergeRedeclarable(TD, Redecl);
694}
695
696void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
697 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
698 if (auto *Template = readDeclAs<TypeAliasTemplateDecl>())
699 // Merged when we merge the template.
700 TD->setDescribedAliasTemplate(Template);
701 else
702 mergeRedeclarable(TD, Redecl);
703}
704
705ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
706 RedeclarableResult Redecl = VisitRedeclarable(TD);
707 VisitTypeDecl(TD);
708
709 TD->IdentifierNamespace = Record.readInt();
710 TD->setTagKind((TagDecl::TagKind)Record.readInt());
711 if (!isa<CXXRecordDecl>(TD))
712 TD->setCompleteDefinition(Record.readInt());
713 TD->setEmbeddedInDeclarator(Record.readInt());
714 TD->setFreeStanding(Record.readInt());
715 TD->setCompleteDefinitionRequired(Record.readInt());
716 TD->setBraceRange(readSourceRange());
717
718 switch (Record.readInt()) {
719 case 0:
720 break;
721 case 1: { // ExtInfo
722 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
723 Record.readQualifierInfo(*Info);
724 TD->TypedefNameDeclOrQualifier = Info;
725 break;
726 }
727 case 2: // TypedefNameForAnonDecl
728 NamedDeclForTagDecl = readDeclID();
729 TypedefNameForLinkage = Record.readIdentifier();
730 break;
731 default:
732 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 732)
;
733 }
734
735 if (!isa<CXXRecordDecl>(TD))
736 mergeRedeclarable(TD, Redecl);
737 return Redecl;
738}
739
740void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
741 VisitTagDecl(ED);
742 if (TypeSourceInfo *TI = readTypeSourceInfo())
743 ED->setIntegerTypeSourceInfo(TI);
744 else
745 ED->setIntegerType(Record.readType());
746 ED->setPromotionType(Record.readType());
747 ED->setNumPositiveBits(Record.readInt());
748 ED->setNumNegativeBits(Record.readInt());
749 ED->setScoped(Record.readInt());
750 ED->setScopedUsingClassTag(Record.readInt());
751 ED->setFixed(Record.readInt());
752
753 ED->setHasODRHash(true);
754 ED->ODRHash = Record.readInt();
755
756 // If this is a definition subject to the ODR, and we already have a
757 // definition, merge this one into it.
758 if (ED->isCompleteDefinition() &&
759 Reader.getContext().getLangOpts().Modules &&
760 Reader.getContext().getLangOpts().CPlusPlus) {
761 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
762 if (!OldDef) {
763 // This is the first time we've seen an imported definition. Look for a
764 // local definition before deciding that we are the first definition.
765 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
766 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
767 OldDef = D;
768 break;
769 }
770 }
771 }
772 if (OldDef) {
773 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
774 ED->setCompleteDefinition(false);
775 Reader.mergeDefinitionVisibility(OldDef, ED);
776 if (OldDef->getODRHash() != ED->getODRHash())
777 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
778 } else {
779 OldDef = ED;
780 }
781 }
782
783 if (auto *InstED = readDeclAs<EnumDecl>()) {
784 auto TSK = (TemplateSpecializationKind)Record.readInt();
785 SourceLocation POI = readSourceLocation();
786 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
787 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
788 }
789}
790
791ASTDeclReader::RedeclarableResult
792ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
793 RedeclarableResult Redecl = VisitTagDecl(RD);
794 RD->setHasFlexibleArrayMember(Record.readInt());
795 RD->setAnonymousStructOrUnion(Record.readInt());
796 RD->setHasObjectMember(Record.readInt());
797 RD->setHasVolatileMember(Record.readInt());
798 RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
799 RD->setNonTrivialToPrimitiveCopy(Record.readInt());
800 RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
801 RD->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(Record.readInt());
802 RD->setHasNonTrivialToPrimitiveDestructCUnion(Record.readInt());
803 RD->setHasNonTrivialToPrimitiveCopyCUnion(Record.readInt());
804 RD->setParamDestroyedInCallee(Record.readInt());
805 RD->setArgPassingRestrictions((RecordDecl::ArgPassingKind)Record.readInt());
806 return Redecl;
807}
808
809void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
810 VisitNamedDecl(VD);
811 // For function declarations, defer reading the type in case the function has
812 // a deduced return type that references an entity declared within the
813 // function.
814 if (isa<FunctionDecl>(VD))
815 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
816 else
817 VD->setType(Record.readType());
818}
819
820void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
821 VisitValueDecl(ECD);
822 if (Record.readInt())
823 ECD->setInitExpr(Record.readExpr());
824 ECD->setInitVal(Record.readAPSInt());
825 mergeMergeable(ECD);
826}
827
828void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
829 VisitValueDecl(DD);
830 DD->setInnerLocStart(readSourceLocation());
831 if (Record.readInt()) { // hasExtInfo
832 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
833 Record.readQualifierInfo(*Info);
834 Info->TrailingRequiresClause = Record.readExpr();
835 DD->DeclInfo = Info;
836 }
837 QualType TSIType = Record.readType();
838 DD->setTypeSourceInfo(
839 TSIType.isNull() ? nullptr
840 : Reader.getContext().CreateTypeSourceInfo(TSIType));
841}
842
843void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
844 RedeclarableResult Redecl = VisitRedeclarable(FD);
845 VisitDeclaratorDecl(FD);
846
847 // Attach a type to this function. Use the real type if possible, but fall
848 // back to the type as written if it involves a deduced return type.
849 if (FD->getTypeSourceInfo() &&
850 FD->getTypeSourceInfo()->getType()->castAs<FunctionType>()
851 ->getReturnType()->getContainedAutoType()) {
852 // We'll set up the real type in Visit, once we've finished loading the
853 // function.
854 FD->setType(FD->getTypeSourceInfo()->getType());
855 Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
856 } else {
857 FD->setType(Reader.GetType(DeferredTypeID));
858 }
859 DeferredTypeID = 0;
860
861 FD->DNLoc = Record.readDeclarationNameLoc(FD->getDeclName());
862 FD->IdentifierNamespace = Record.readInt();
863
864 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
865 // after everything else is read.
866
867 FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
868 FD->setInlineSpecified(Record.readInt());
869 FD->setImplicitlyInline(Record.readInt());
870 FD->setVirtualAsWritten(Record.readInt());
871 // We defer calling `FunctionDecl::setPure()` here as for methods of
872 // `CXXTemplateSpecializationDecl`s, we may not have connected up the
873 // definition (which is required for `setPure`).
874 const bool Pure = Record.readInt();
875 FD->setHasInheritedPrototype(Record.readInt());
876 FD->setHasWrittenPrototype(Record.readInt());
877 FD->setDeletedAsWritten(Record.readInt());
878 FD->setTrivial(Record.readInt());
879 FD->setTrivialForCall(Record.readInt());
880 FD->setDefaulted(Record.readInt());
881 FD->setExplicitlyDefaulted(Record.readInt());
882 FD->setHasImplicitReturnZero(Record.readInt());
883 FD->setConstexprKind(static_cast<ConstexprSpecKind>(Record.readInt()));
884 FD->setUsesSEHTry(Record.readInt());
885 FD->setHasSkippedBody(Record.readInt());
886 FD->setIsMultiVersion(Record.readInt());
887 FD->setLateTemplateParsed(Record.readInt());
888
889 FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
890 FD->EndRangeLoc = readSourceLocation();
891
892 FD->ODRHash = Record.readInt();
893 FD->setHasODRHash(true);
894
895 if (FD->isDefaulted()) {
896 if (unsigned NumLookups = Record.readInt()) {
897 SmallVector<DeclAccessPair, 8> Lookups;
898 for (unsigned I = 0; I != NumLookups; ++I) {
899 NamedDecl *ND = Record.readDeclAs<NamedDecl>();
900 AccessSpecifier AS = (AccessSpecifier)Record.readInt();
901 Lookups.push_back(DeclAccessPair::make(ND, AS));
902 }
903 FD->setDefaultedFunctionInfo(FunctionDecl::DefaultedFunctionInfo::Create(
904 Reader.getContext(), Lookups));
905 }
906 }
907
908 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
909 case FunctionDecl::TK_NonTemplate:
910 mergeRedeclarable(FD, Redecl);
911 break;
912 case FunctionDecl::TK_FunctionTemplate:
913 // Merged when we merge the template.
914 FD->setDescribedFunctionTemplate(readDeclAs<FunctionTemplateDecl>());
915 break;
916 case FunctionDecl::TK_MemberSpecialization: {
917 auto *InstFD = readDeclAs<FunctionDecl>();
918 auto TSK = (TemplateSpecializationKind)Record.readInt();
919 SourceLocation POI = readSourceLocation();
920 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
921 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
922 mergeRedeclarable(FD, Redecl);
923 break;
924 }
925 case FunctionDecl::TK_FunctionTemplateSpecialization: {
926 auto *Template = readDeclAs<FunctionTemplateDecl>();
927 auto TSK = (TemplateSpecializationKind)Record.readInt();
928
929 // Template arguments.
930 SmallVector<TemplateArgument, 8> TemplArgs;
931 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
932
933 // Template args as written.
934 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
935 SourceLocation LAngleLoc, RAngleLoc;
936 bool HasTemplateArgumentsAsWritten = Record.readInt();
937 if (HasTemplateArgumentsAsWritten) {
938 unsigned NumTemplateArgLocs = Record.readInt();
939 TemplArgLocs.reserve(NumTemplateArgLocs);
940 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
941 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
942
943 LAngleLoc = readSourceLocation();
944 RAngleLoc = readSourceLocation();
945 }
946
947 SourceLocation POI = readSourceLocation();
948
949 ASTContext &C = Reader.getContext();
950 TemplateArgumentList *TemplArgList
951 = TemplateArgumentList::CreateCopy(C, TemplArgs);
952 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
953 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
954 TemplArgsInfo.addArgument(TemplArgLocs[i]);
955
956 MemberSpecializationInfo *MSInfo = nullptr;
957 if (Record.readInt()) {
958 auto *FD = readDeclAs<FunctionDecl>();
959 auto TSK = (TemplateSpecializationKind)Record.readInt();
960 SourceLocation POI = readSourceLocation();
961
962 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
963 MSInfo->setPointOfInstantiation(POI);
964 }
965
966 FunctionTemplateSpecializationInfo *FTInfo =
967 FunctionTemplateSpecializationInfo::Create(
968 C, FD, Template, TSK, TemplArgList,
969 HasTemplateArgumentsAsWritten ? &TemplArgsInfo : nullptr, POI,
970 MSInfo);
971 FD->TemplateOrSpecialization = FTInfo;
972
973 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
974 // The template that contains the specializations set. It's not safe to
975 // use getCanonicalDecl on Template since it may still be initializing.
976 auto *CanonTemplate = readDeclAs<FunctionTemplateDecl>();
977 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
978 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
979 // FunctionTemplateSpecializationInfo's Profile().
980 // We avoid getASTContext because a decl in the parent hierarchy may
981 // be initializing.
982 llvm::FoldingSetNodeID ID;
983 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
984 void *InsertPos = nullptr;
985 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
986 FunctionTemplateSpecializationInfo *ExistingInfo =
987 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
988 if (InsertPos)
989 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
990 else {
991 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 992, __PRETTY_FUNCTION__))
992 "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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 992, __PRETTY_FUNCTION__))
;
993 mergeRedeclarable(FD, ExistingInfo->getFunction(), Redecl);
994 }
995 }
996 break;
997 }
998 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
999 // Templates.
1000 UnresolvedSet<8> TemplDecls;
1001 unsigned NumTemplates = Record.readInt();
1002 while (NumTemplates--)
1003 TemplDecls.addDecl(readDeclAs<NamedDecl>());
1004
1005 // Templates args.
1006 TemplateArgumentListInfo TemplArgs;
1007 unsigned NumArgs = Record.readInt();
1008 while (NumArgs--)
1009 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
1010 TemplArgs.setLAngleLoc(readSourceLocation());
1011 TemplArgs.setRAngleLoc(readSourceLocation());
1012
1013 FD->setDependentTemplateSpecialization(Reader.getContext(),
1014 TemplDecls, TemplArgs);
1015 // These are not merged; we don't need to merge redeclarations of dependent
1016 // template friends.
1017 break;
1018 }
1019 }
1020
1021 // Defer calling `setPure` until merging above has guaranteed we've set
1022 // `DefinitionData` (as this will need to access it).
1023 FD->setPure(Pure);
1024
1025 // Read in the parameters.
1026 unsigned NumParams = Record.readInt();
1027 SmallVector<ParmVarDecl *, 16> Params;
1028 Params.reserve(NumParams);
1029 for (unsigned I = 0; I != NumParams; ++I)
1030 Params.push_back(readDeclAs<ParmVarDecl>());
1031 FD->setParams(Reader.getContext(), Params);
1032}
1033
1034void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
1035 VisitNamedDecl(MD);
1036 if (Record.readInt()) {
1037 // Load the body on-demand. Most clients won't care, because method
1038 // definitions rarely show up in headers.
1039 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1040 HasPendingBody = true;
1041 }
1042 MD->setSelfDecl(readDeclAs<ImplicitParamDecl>());
1043 MD->setCmdDecl(readDeclAs<ImplicitParamDecl>());
1044 MD->setInstanceMethod(Record.readInt());
1045 MD->setVariadic(Record.readInt());
1046 MD->setPropertyAccessor(Record.readInt());
1047 MD->setSynthesizedAccessorStub(Record.readInt());
1048 MD->setDefined(Record.readInt());
1049 MD->setOverriding(Record.readInt());
1050 MD->setHasSkippedBody(Record.readInt());
1051
1052 MD->setIsRedeclaration(Record.readInt());
1053 MD->setHasRedeclaration(Record.readInt());
1054 if (MD->hasRedeclaration())
1055 Reader.getContext().setObjCMethodRedeclaration(MD,
1056 readDeclAs<ObjCMethodDecl>());
1057
1058 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1059 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1060 MD->setRelatedResultType(Record.readInt());
1061 MD->setReturnType(Record.readType());
1062 MD->setReturnTypeSourceInfo(readTypeSourceInfo());
1063 MD->DeclEndLoc = readSourceLocation();
1064 unsigned NumParams = Record.readInt();
1065 SmallVector<ParmVarDecl *, 16> Params;
1066 Params.reserve(NumParams);
1067 for (unsigned I = 0; I != NumParams; ++I)
1068 Params.push_back(readDeclAs<ParmVarDecl>());
1069
1070 MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1071 unsigned NumStoredSelLocs = Record.readInt();
1072 SmallVector<SourceLocation, 16> SelLocs;
1073 SelLocs.reserve(NumStoredSelLocs);
1074 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1075 SelLocs.push_back(readSourceLocation());
1076
1077 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1078}
1079
1080void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1081 VisitTypedefNameDecl(D);
1082
1083 D->Variance = Record.readInt();
1084 D->Index = Record.readInt();
1085 D->VarianceLoc = readSourceLocation();
1086 D->ColonLoc = readSourceLocation();
1087}
1088
1089void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1090 VisitNamedDecl(CD);
1091 CD->setAtStartLoc(readSourceLocation());
1092 CD->setAtEndRange(readSourceRange());
1093}
1094
1095ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1096 unsigned numParams = Record.readInt();
1097 if (numParams == 0)
1098 return nullptr;
1099
1100 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1101 typeParams.reserve(numParams);
1102 for (unsigned i = 0; i != numParams; ++i) {
1103 auto *typeParam = readDeclAs<ObjCTypeParamDecl>();
1104 if (!typeParam)
1105 return nullptr;
1106
1107 typeParams.push_back(typeParam);
1108 }
1109
1110 SourceLocation lAngleLoc = readSourceLocation();
1111 SourceLocation rAngleLoc = readSourceLocation();
1112
1113 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1114 typeParams, rAngleLoc);
1115}
1116
1117void ASTDeclReader::ReadObjCDefinitionData(
1118 struct ObjCInterfaceDecl::DefinitionData &Data) {
1119 // Read the superclass.
1120 Data.SuperClassTInfo = readTypeSourceInfo();
1121
1122 Data.EndLoc = readSourceLocation();
1123 Data.HasDesignatedInitializers = Record.readInt();
1124
1125 // Read the directly referenced protocols and their SourceLocations.
1126 unsigned NumProtocols = Record.readInt();
1127 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1128 Protocols.reserve(NumProtocols);
1129 for (unsigned I = 0; I != NumProtocols; ++I)
1130 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1131 SmallVector<SourceLocation, 16> ProtoLocs;
1132 ProtoLocs.reserve(NumProtocols);
1133 for (unsigned I = 0; I != NumProtocols; ++I)
1134 ProtoLocs.push_back(readSourceLocation());
1135 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1136 Reader.getContext());
1137
1138 // Read the transitive closure of protocols referenced by this class.
1139 NumProtocols = Record.readInt();
1140 Protocols.clear();
1141 Protocols.reserve(NumProtocols);
1142 for (unsigned I = 0; I != NumProtocols; ++I)
1143 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1144 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1145 Reader.getContext());
1146}
1147
1148void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1149 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1150 // FIXME: odr checking?
1151}
1152
1153void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1154 RedeclarableResult Redecl = VisitRedeclarable(ID);
1155 VisitObjCContainerDecl(ID);
1156 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1157 mergeRedeclarable(ID, Redecl);
1158
1159 ID->TypeParamList = ReadObjCTypeParamList();
1160 if (Record.readInt()) {
1161 // Read the definition.
1162 ID->allocateDefinitionData();
1163
1164 ReadObjCDefinitionData(ID->data());
1165 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1166 if (Canon->Data.getPointer()) {
1167 // If we already have a definition, keep the definition invariant and
1168 // merge the data.
1169 MergeDefinitionData(Canon, std::move(ID->data()));
1170 ID->Data = Canon->Data;
1171 } else {
1172 // Set the definition data of the canonical declaration, so other
1173 // redeclarations will see it.
1174 ID->getCanonicalDecl()->Data = ID->Data;
1175
1176 // We will rebuild this list lazily.
1177 ID->setIvarList(nullptr);
1178 }
1179
1180 // Note that we have deserialized a definition.
1181 Reader.PendingDefinitions.insert(ID);
1182
1183 // Note that we've loaded this Objective-C class.
1184 Reader.ObjCClassesLoaded.push_back(ID);
1185 } else {
1186 ID->Data = ID->getCanonicalDecl()->Data;
1187 }
1188}
1189
1190void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1191 VisitFieldDecl(IVD);
1192 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1193 // This field will be built lazily.
1194 IVD->setNextIvar(nullptr);
1195 bool synth = Record.readInt();
1196 IVD->setSynthesize(synth);
1197}
1198
1199void ASTDeclReader::ReadObjCDefinitionData(
1200 struct ObjCProtocolDecl::DefinitionData &Data) {
1201 unsigned NumProtoRefs = Record.readInt();
1202 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1203 ProtoRefs.reserve(NumProtoRefs);
1204 for (unsigned I = 0; I != NumProtoRefs; ++I)
1205 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1206 SmallVector<SourceLocation, 16> ProtoLocs;
1207 ProtoLocs.reserve(NumProtoRefs);
1208 for (unsigned I = 0; I != NumProtoRefs; ++I)
1209 ProtoLocs.push_back(readSourceLocation());
1210 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1211 ProtoLocs.data(), Reader.getContext());
1212}
1213
1214void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1215 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1216 // FIXME: odr checking?
1217}
1218
1219void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1220 RedeclarableResult Redecl = VisitRedeclarable(PD);
1221 VisitObjCContainerDecl(PD);
1222 mergeRedeclarable(PD, Redecl);
1223
1224 if (Record.readInt()) {
1225 // Read the definition.
1226 PD->allocateDefinitionData();
1227
1228 ReadObjCDefinitionData(PD->data());
1229
1230 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1231 if (Canon->Data.getPointer()) {
1232 // If we already have a definition, keep the definition invariant and
1233 // merge the data.
1234 MergeDefinitionData(Canon, std::move(PD->data()));
1235 PD->Data = Canon->Data;
1236 } else {
1237 // Set the definition data of the canonical declaration, so other
1238 // redeclarations will see it.
1239 PD->getCanonicalDecl()->Data = PD->Data;
1240 }
1241 // Note that we have deserialized a definition.
1242 Reader.PendingDefinitions.insert(PD);
1243 } else {
1244 PD->Data = PD->getCanonicalDecl()->Data;
1245 }
1246}
1247
1248void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1249 VisitFieldDecl(FD);
1250}
1251
1252void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1253 VisitObjCContainerDecl(CD);
1254 CD->setCategoryNameLoc(readSourceLocation());
1255 CD->setIvarLBraceLoc(readSourceLocation());
1256 CD->setIvarRBraceLoc(readSourceLocation());
1257
1258 // Note that this category has been deserialized. We do this before
1259 // deserializing the interface declaration, so that it will consider this
1260 /// category.
1261 Reader.CategoriesDeserialized.insert(CD);
1262
1263 CD->ClassInterface = readDeclAs<ObjCInterfaceDecl>();
1264 CD->TypeParamList = ReadObjCTypeParamList();
1265 unsigned NumProtoRefs = Record.readInt();
1266 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1267 ProtoRefs.reserve(NumProtoRefs);
1268 for (unsigned I = 0; I != NumProtoRefs; ++I)
1269 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1270 SmallVector<SourceLocation, 16> ProtoLocs;
1271 ProtoLocs.reserve(NumProtoRefs);
1272 for (unsigned I = 0; I != NumProtoRefs; ++I)
1273 ProtoLocs.push_back(readSourceLocation());
1274 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1275 Reader.getContext());
1276
1277 // Protocols in the class extension belong to the class.
1278 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1279 CD->ClassInterface->mergeClassExtensionProtocolList(
1280 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1281 Reader.getContext());
1282}
1283
1284void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1285 VisitNamedDecl(CAD);
1286 CAD->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1287}
1288
1289void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1290 VisitNamedDecl(D);
1291 D->setAtLoc(readSourceLocation());
1292 D->setLParenLoc(readSourceLocation());
1293 QualType T = Record.readType();
1294 TypeSourceInfo *TSI = readTypeSourceInfo();
1295 D->setType(T, TSI);
1296 D->setPropertyAttributes((ObjCPropertyAttribute::Kind)Record.readInt());
1297 D->setPropertyAttributesAsWritten(
1298 (ObjCPropertyAttribute::Kind)Record.readInt());
1299 D->setPropertyImplementation(
1300 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1301 DeclarationName GetterName = Record.readDeclarationName();
1302 SourceLocation GetterLoc = readSourceLocation();
1303 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1304 DeclarationName SetterName = Record.readDeclarationName();
1305 SourceLocation SetterLoc = readSourceLocation();
1306 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1307 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1308 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1309 D->setPropertyIvarDecl(readDeclAs<ObjCIvarDecl>());
1310}
1311
1312void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1313 VisitObjCContainerDecl(D);
1314 D->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1315}
1316
1317void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1318 VisitObjCImplDecl(D);
1319 D->CategoryNameLoc = readSourceLocation();
1320}
1321
1322void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1323 VisitObjCImplDecl(D);
1324 D->setSuperClass(readDeclAs<ObjCInterfaceDecl>());
1325 D->SuperLoc = readSourceLocation();
1326 D->setIvarLBraceLoc(readSourceLocation());
1327 D->setIvarRBraceLoc(readSourceLocation());
1328 D->setHasNonZeroConstructors(Record.readInt());
1329 D->setHasDestructors(Record.readInt());
1330 D->NumIvarInitializers = Record.readInt();
1331 if (D->NumIvarInitializers)
1332 D->IvarInitializers = ReadGlobalOffset();
1333}
1334
1335void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1336 VisitDecl(D);
1337 D->setAtLoc(readSourceLocation());
1338 D->setPropertyDecl(readDeclAs<ObjCPropertyDecl>());
1339 D->PropertyIvarDecl = readDeclAs<ObjCIvarDecl>();
1340 D->IvarLoc = readSourceLocation();
1341 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1342 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1343 D->setGetterCXXConstructor(Record.readExpr());
1344 D->setSetterCXXAssignment(Record.readExpr());
1345}
1346
1347void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1348 VisitDeclaratorDecl(FD);
1349 FD->Mutable = Record.readInt();
1350
1351 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1352 FD->InitStorage.setInt(ISK);
1353 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1354 ? Record.readType().getAsOpaquePtr()
1355 : Record.readExpr());
1356 }
1357
1358 if (auto *BW = Record.readExpr())
1359 FD->setBitWidth(BW);
1360
1361 if (!FD->getDeclName()) {
1362 if (auto *Tmpl = readDeclAs<FieldDecl>())
1363 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1364 }
1365 mergeMergeable(FD);
1366}
1367
1368void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1369 VisitDeclaratorDecl(PD);
1370 PD->GetterId = Record.readIdentifier();
1371 PD->SetterId = Record.readIdentifier();
1372}
1373
1374void ASTDeclReader::VisitMSGuidDecl(MSGuidDecl *D) {
1375 VisitValueDecl(D);
1376 D->PartVal.Part1 = Record.readInt();
1377 D->PartVal.Part2 = Record.readInt();
1378 D->PartVal.Part3 = Record.readInt();
1379 for (auto &C : D->PartVal.Part4And5)
1380 C = Record.readInt();
1381
1382 // Add this GUID to the AST context's lookup structure, and merge if needed.
1383 if (MSGuidDecl *Existing = Reader.getContext().MSGuidDecls.GetOrInsertNode(D))
1384 Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());
1385}
1386
1387void ASTDeclReader::VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D) {
1388 VisitValueDecl(D);
1389 D->Value = Record.readAPValue();
1390
1391 // Add this template parameter object to the AST context's lookup structure,
1392 // and merge if needed.
1393 if (TemplateParamObjectDecl *Existing =
1394 Reader.getContext().TemplateParamObjectDecls.GetOrInsertNode(D))
1395 Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());
1396}
1397
1398void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1399 VisitValueDecl(FD);
1400
1401 FD->ChainingSize = Record.readInt();
1402 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1402, __PRETTY_FUNCTION__))
;
1403 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1404
1405 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1406 FD->Chaining[I] = readDeclAs<NamedDecl>();
1407
1408 mergeMergeable(FD);
1409}
1410
1411ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1412 RedeclarableResult Redecl = VisitRedeclarable(VD);
1413 VisitDeclaratorDecl(VD);
1414
1415 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1416 VD->VarDeclBits.TSCSpec = Record.readInt();
1417 VD->VarDeclBits.InitStyle = Record.readInt();
1418 VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1419 if (!isa<ParmVarDecl>(VD)) {
1420 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1421 Record.readInt();
1422 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1423 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1424 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1425 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1426 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1427 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1428 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1429 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1430 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1431 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1432 VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1433 }
1434 auto VarLinkage = Linkage(Record.readInt());
1435 VD->setCachedLinkage(VarLinkage);
1436
1437 // Reconstruct the one piece of the IdentifierNamespace that we need.
1438 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1439 VD->getLexicalDeclContext()->isFunctionOrMethod())
1440 VD->setLocalExternDecl();
1441
1442 if (uint64_t Val = Record.readInt()) {
1443 VD->setInit(Record.readExpr());
1444 if (Val != 1) {
1445 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1446 Eval->HasConstantInitialization = (Val & 2) != 0;
1447 Eval->HasConstantDestruction = (Val & 4) != 0;
1448 }
1449 }
1450
1451 if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1452 Expr *CopyExpr = Record.readExpr();
1453 if (CopyExpr)
1454 Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1455 }
1456
1457 if (VD->getStorageDuration() == SD_Static && Record.readInt()) {
1458 Reader.DefinitionSource[VD] =
1459 Loc.F->Kind == ModuleKind::MK_MainFile ||
1460 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1461 }
1462
1463 enum VarKind {
1464 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1465 };
1466 switch ((VarKind)Record.readInt()) {
1467 case VarNotTemplate:
1468 // Only true variables (not parameters or implicit parameters) can be
1469 // merged; the other kinds are not really redeclarable at all.
1470 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1471 !isa<VarTemplateSpecializationDecl>(VD))
1472 mergeRedeclarable(VD, Redecl);
1473 break;
1474 case VarTemplate:
1475 // Merged when we merge the template.
1476 VD->setDescribedVarTemplate(readDeclAs<VarTemplateDecl>());
1477 break;
1478 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1479 auto *Tmpl = readDeclAs<VarDecl>();
1480 auto TSK = (TemplateSpecializationKind)Record.readInt();
1481 SourceLocation POI = readSourceLocation();
1482 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1483 mergeRedeclarable(VD, Redecl);
1484 break;
1485 }
1486 }
1487
1488 return Redecl;
1489}
1490
1491void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1492 VisitVarDecl(PD);
1493}
1494
1495void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1496 VisitVarDecl(PD);
1497 unsigned isObjCMethodParam = Record.readInt();
1498 unsigned scopeDepth = Record.readInt();
1499 unsigned scopeIndex = Record.readInt();
1500 unsigned declQualifier = Record.readInt();
1501 if (isObjCMethodParam) {
1502 assert(scopeDepth == 0)((scopeDepth == 0) ? static_cast<void> (0) : __assert_fail
("scopeDepth == 0", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1502, __PRETTY_FUNCTION__))
;
1503 PD->setObjCMethodScopeInfo(scopeIndex);
1504 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1505 } else {
1506 PD->setScopeInfo(scopeDepth, scopeIndex);
1507 }
1508 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1509 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1510 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1511 PD->setUninstantiatedDefaultArg(Record.readExpr());
1512
1513 // FIXME: If this is a redeclaration of a function from another module, handle
1514 // inheritance of default arguments.
1515}
1516
1517void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1518 VisitVarDecl(DD);
1519 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1520 for (unsigned I = 0; I != DD->NumBindings; ++I) {
1521 BDs[I] = readDeclAs<BindingDecl>();
1522 BDs[I]->setDecomposedDecl(DD);
1523 }
1524}
1525
1526void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1527 VisitValueDecl(BD);
1528 BD->Binding = Record.readExpr();
1529}
1530
1531void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1532 VisitDecl(AD);
1533 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1534 AD->setRParenLoc(readSourceLocation());
1535}
1536
1537void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1538 VisitDecl(BD);
1539 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1540 BD->setSignatureAsWritten(readTypeSourceInfo());
1541 unsigned NumParams = Record.readInt();
1542 SmallVector<ParmVarDecl *, 16> Params;
1543 Params.reserve(NumParams);
1544 for (unsigned I = 0; I != NumParams; ++I)
1545 Params.push_back(readDeclAs<ParmVarDecl>());
1546 BD->setParams(Params);
1547
1548 BD->setIsVariadic(Record.readInt());
1549 BD->setBlockMissingReturnType(Record.readInt());
1550 BD->setIsConversionFromLambda(Record.readInt());
1551 BD->setDoesNotEscape(Record.readInt());
1552 BD->setCanAvoidCopyToHeap(Record.readInt());
1553
1554 bool capturesCXXThis = Record.readInt();
1555 unsigned numCaptures = Record.readInt();
1556 SmallVector<BlockDecl::Capture, 16> captures;
1557 captures.reserve(numCaptures);
1558 for (unsigned i = 0; i != numCaptures; ++i) {
1559 auto *decl = readDeclAs<VarDecl>();
1560 unsigned flags = Record.readInt();
1561 bool byRef = (flags & 1);
1562 bool nested = (flags & 2);
1563 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1564
1565 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1566 }
1567 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1568}
1569
1570void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1571 VisitDecl(CD);
1572 unsigned ContextParamPos = Record.readInt();
1573 CD->setNothrow(Record.readInt() != 0);
1574 // Body is set by VisitCapturedStmt.
1575 for (unsigned I = 0; I < CD->NumParams; ++I) {
1576 if (I != ContextParamPos)
1577 CD->setParam(I, readDeclAs<ImplicitParamDecl>());
1578 else
1579 CD->setContextParam(I, readDeclAs<ImplicitParamDecl>());
1580 }
1581}
1582
1583void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1584 VisitDecl(D);
1585 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1586 D->setExternLoc(readSourceLocation());
1587 D->setRBraceLoc(readSourceLocation());
1588}
1589
1590void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1591 VisitDecl(D);
1592 D->RBraceLoc = readSourceLocation();
1593}
1594
1595void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1596 VisitNamedDecl(D);
1597 D->setLocStart(readSourceLocation());
1598}
1599
1600void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1601 RedeclarableResult Redecl = VisitRedeclarable(D);
1602 VisitNamedDecl(D);
1603 D->setInline(Record.readInt());
1604 D->LocStart = readSourceLocation();
1605 D->RBraceLoc = readSourceLocation();
1606
1607 // Defer loading the anonymous namespace until we've finished merging
1608 // this namespace; loading it might load a later declaration of the
1609 // same namespace, and we have an invariant that older declarations
1610 // get merged before newer ones try to merge.
1611 GlobalDeclID AnonNamespace = 0;
1612 if (Redecl.getFirstID() == ThisDeclID) {
1613 AnonNamespace = readDeclID();
1614 } else {
1615 // Link this namespace back to the first declaration, which has already
1616 // been deserialized.
1617 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1618 }
1619
1620 mergeRedeclarable(D, Redecl);
1621
1622 if (AnonNamespace) {
1623 // Each module has its own anonymous namespace, which is disjoint from
1624 // any other module's anonymous namespaces, so don't attach the anonymous
1625 // namespace at all.
1626 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1627 if (!Record.isModule())
1628 D->setAnonymousNamespace(Anon);
1629 }
1630}
1631
1632void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1633 RedeclarableResult Redecl = VisitRedeclarable(D);
1634 VisitNamedDecl(D);
1635 D->NamespaceLoc = readSourceLocation();
1636 D->IdentLoc = readSourceLocation();
1637 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1638 D->Namespace = readDeclAs<NamedDecl>();
1639 mergeRedeclarable(D, Redecl);
1640}
1641
1642void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1643 VisitNamedDecl(D);
1644 D->setUsingLoc(readSourceLocation());
1645 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1646 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1647 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1648 D->setTypename(Record.readInt());
1649 if (auto *Pattern = readDeclAs<NamedDecl>())
1650 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1651 mergeMergeable(D);
1652}
1653
1654void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1655 VisitNamedDecl(D);
1656 D->InstantiatedFrom = readDeclAs<NamedDecl>();
1657 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1658 for (unsigned I = 0; I != D->NumExpansions; ++I)
1659 Expansions[I] = readDeclAs<NamedDecl>();
1660 mergeMergeable(D);
1661}
1662
1663void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1664 RedeclarableResult Redecl = VisitRedeclarable(D);
1665 VisitNamedDecl(D);
1666 D->Underlying = readDeclAs<NamedDecl>();
1667 D->IdentifierNamespace = Record.readInt();
1668 D->UsingOrNextShadow = readDeclAs<NamedDecl>();
1669 auto *Pattern = readDeclAs<UsingShadowDecl>();
1670 if (Pattern)
1671 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1672 mergeRedeclarable(D, Redecl);
1673}
1674
1675void ASTDeclReader::VisitConstructorUsingShadowDecl(
1676 ConstructorUsingShadowDecl *D) {
1677 VisitUsingShadowDecl(D);
1678 D->NominatedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1679 D->ConstructedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1680 D->IsVirtual = Record.readInt();
1681}
1682
1683void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1684 VisitNamedDecl(D);
1685 D->UsingLoc = readSourceLocation();
1686 D->NamespaceLoc = readSourceLocation();
1687 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1688 D->NominatedNamespace = readDeclAs<NamedDecl>();
1689 D->CommonAncestor = readDeclAs<DeclContext>();
1690}
1691
1692void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1693 VisitValueDecl(D);
1694 D->setUsingLoc(readSourceLocation());
1695 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1696 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1697 D->EllipsisLoc = readSourceLocation();
1698 mergeMergeable(D);
1699}
1700
1701void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1702 UnresolvedUsingTypenameDecl *D) {
1703 VisitTypeDecl(D);
1704 D->TypenameLocation = readSourceLocation();
1705 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1706 D->EllipsisLoc = readSourceLocation();
1707 mergeMergeable(D);
1708}
1709
1710void ASTDeclReader::ReadCXXDefinitionData(
1711 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1712 #define FIELD(Name, Width, Merge) \
1713 Data.Name = Record.readInt();
1714 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1715
1716 // Note: the caller has deserialized the IsLambda bit already.
1717 Data.ODRHash = Record.readInt();
1718 Data.HasODRHash = true;
1719
1720 if (Record.readInt()) {
1721 Reader.DefinitionSource[D] =
1722 Loc.F->Kind == ModuleKind::MK_MainFile ||
1723 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1724 }
1725
1726 Data.NumBases = Record.readInt();
1727 if (Data.NumBases)
1728 Data.Bases = ReadGlobalOffset();
1729 Data.NumVBases = Record.readInt();
1730 if (Data.NumVBases)
1731 Data.VBases = ReadGlobalOffset();
1732
1733 Record.readUnresolvedSet(Data.Conversions);
1734 Data.ComputedVisibleConversions = Record.readInt();
1735 if (Data.ComputedVisibleConversions)
1736 Record.readUnresolvedSet(Data.VisibleConversions);
1737 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1737, __PRETTY_FUNCTION__))
;
1738 Data.FirstFriend = readDeclID();
1739
1740 if (Data.IsLambda) {
1741 using Capture = LambdaCapture;
1742
1743 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1744 Lambda.Dependent = Record.readInt();
1745 Lambda.IsGenericLambda = Record.readInt();
1746 Lambda.CaptureDefault = Record.readInt();
1747 Lambda.NumCaptures = Record.readInt();
1748 Lambda.NumExplicitCaptures = Record.readInt();
1749 Lambda.HasKnownInternalLinkage = Record.readInt();
1750 Lambda.ManglingNumber = Record.readInt();
1751 Lambda.ContextDecl = readDeclID();
1752 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1753 sizeof(Capture) * Lambda.NumCaptures);
1754 Capture *ToCapture = Lambda.Captures;
1755 Lambda.MethodTyInfo = readTypeSourceInfo();
1756 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1757 SourceLocation Loc = readSourceLocation();
1758 bool IsImplicit = Record.readInt();
1759 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1760 switch (Kind) {
1761 case LCK_StarThis:
1762 case LCK_This:
1763 case LCK_VLAType:
1764 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1765 break;
1766 case LCK_ByCopy:
1767 case LCK_ByRef:
1768 auto *Var = readDeclAs<VarDecl>();
1769 SourceLocation EllipsisLoc = readSourceLocation();
1770 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1771 break;
1772 }
1773 }
1774 }
1775}
1776
1777void ASTDeclReader::MergeDefinitionData(
1778 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1779 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1780, __PRETTY_FUNCTION__))
1780 "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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1780, __PRETTY_FUNCTION__))
;
1781 auto &DD = *D->DefinitionData;
1782
1783 if (DD.Definition != MergeDD.Definition) {
1784 // Track that we merged the definitions.
1785 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1786 DD.Definition));
1787 Reader.PendingDefinitions.erase(MergeDD.Definition);
1788 MergeDD.Definition->setCompleteDefinition(false);
1789 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1790 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1791, __PRETTY_FUNCTION__))
1791 "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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1791, __PRETTY_FUNCTION__))
;
1792 }
1793
1794 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1795 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1796 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1797 // We faked up this definition data because we found a class for which we'd
1798 // not yet loaded the definition. Replace it with the real thing now.
1799 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1799, __PRETTY_FUNCTION__))
;
1800 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1801
1802 // Don't change which declaration is the definition; that is required
1803 // to be invariant once we select it.
1804 auto *Def = DD.Definition;
1805 DD = std::move(MergeDD);
1806 DD.Definition = Def;
1807 return;
1808 }
1809
1810 bool DetectedOdrViolation = false;
1811
1812 #define FIELD(Name, Width, Merge) Merge(Name)
1813 #define MERGE_OR(Field) DD.Field |= MergeDD.Field;
1814 #define NO_MERGE(Field) \
1815 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1816 MERGE_OR(Field)
1817 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1818 NO_MERGE(IsLambda)
1819 #undef NO_MERGE
1820 #undef MERGE_OR
1821
1822 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1823 DetectedOdrViolation = true;
1824 // FIXME: Issue a diagnostic if the base classes don't match when we come
1825 // to lazily load them.
1826
1827 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1828 // match when we come to lazily load them.
1829 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1830 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1831 DD.ComputedVisibleConversions = true;
1832 }
1833
1834 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1835 // lazily load it.
1836
1837 if (DD.IsLambda) {
1838 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1839 // when they occur within the body of a function template specialization).
1840 }
1841
1842 if (D->getODRHash() != MergeDD.ODRHash) {
1843 DetectedOdrViolation = true;
1844 }
1845
1846 if (DetectedOdrViolation)
1847 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1848 {MergeDD.Definition, &MergeDD});
1849}
1850
1851void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1852 struct CXXRecordDecl::DefinitionData *DD;
1853 ASTContext &C = Reader.getContext();
1854
1855 // Determine whether this is a lambda closure type, so that we can
1856 // allocate the appropriate DefinitionData structure.
1857 bool IsLambda = Record.readInt();
1858 if (IsLambda)
1859 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1860 LCD_None);
1861 else
1862 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1863
1864 CXXRecordDecl *Canon = D->getCanonicalDecl();
1865 // Set decl definition data before reading it, so that during deserialization
1866 // when we read CXXRecordDecl, it already has definition data and we don't
1867 // set fake one.
1868 if (!Canon->DefinitionData)
1869 Canon->DefinitionData = DD;
1870 D->DefinitionData = Canon->DefinitionData;
1871 ReadCXXDefinitionData(*DD, D);
1872
1873 // We might already have a different definition for this record. This can
1874 // happen either because we're reading an update record, or because we've
1875 // already done some merging. Either way, just merge into it.
1876 if (Canon->DefinitionData != DD) {
1877 MergeDefinitionData(Canon, std::move(*DD));
1878 return;
1879 }
1880
1881 // Mark this declaration as being a definition.
1882 D->setCompleteDefinition(true);
1883
1884 // If this is not the first declaration or is an update record, we can have
1885 // other redeclarations already. Make a note that we need to propagate the
1886 // DefinitionData pointer onto them.
1887 if (Update || Canon != D)
1888 Reader.PendingDefinitions.insert(D);
1889}
1890
1891ASTDeclReader::RedeclarableResult
1892ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1893 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1894
1895 ASTContext &C = Reader.getContext();
1896
1897 enum CXXRecKind {
1898 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1899 };
1900 switch ((CXXRecKind)Record.readInt()) {
1901 case CXXRecNotTemplate:
1902 // Merged when we merge the folding set entry in the primary template.
1903 if (!isa<ClassTemplateSpecializationDecl>(D))
1904 mergeRedeclarable(D, Redecl);
1905 break;
1906 case CXXRecTemplate: {
1907 // Merged when we merge the template.
1908 auto *Template = readDeclAs<ClassTemplateDecl>();
1909 D->TemplateOrInstantiation = Template;
1910 if (!Template->getTemplatedDecl()) {
1911 // We've not actually loaded the ClassTemplateDecl yet, because we're
1912 // currently being loaded as its pattern. Rely on it to set up our
1913 // TypeForDecl (see VisitClassTemplateDecl).
1914 //
1915 // Beware: we do not yet know our canonical declaration, and may still
1916 // get merged once the surrounding class template has got off the ground.
1917 DeferredTypeID = 0;
1918 }
1919 break;
1920 }
1921 case CXXRecMemberSpecialization: {
1922 auto *RD = readDeclAs<CXXRecordDecl>();
1923 auto TSK = (TemplateSpecializationKind)Record.readInt();
1924 SourceLocation POI = readSourceLocation();
1925 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1926 MSI->setPointOfInstantiation(POI);
1927 D->TemplateOrInstantiation = MSI;
1928 mergeRedeclarable(D, Redecl);
1929 break;
1930 }
1931 }
1932
1933 bool WasDefinition = Record.readInt();
1934 if (WasDefinition)
1935 ReadCXXRecordDefinition(D, /*Update*/false);
1936 else
1937 // Propagate DefinitionData pointer from the canonical declaration.
1938 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1939
1940 // Lazily load the key function to avoid deserializing every method so we can
1941 // compute it.
1942 if (WasDefinition) {
1943 DeclID KeyFn = readDeclID();
1944 if (KeyFn && D->isCompleteDefinition())
1945 // FIXME: This is wrong for the ARM ABI, where some other module may have
1946 // made this function no longer be a key function. We need an update
1947 // record or similar for that case.
1948 C.KeyFunctions[D] = KeyFn;
1949 }
1950
1951 return Redecl;
1952}
1953
1954void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1955 D->setExplicitSpecifier(Record.readExplicitSpec());
1956 VisitFunctionDecl(D);
1957 D->setIsCopyDeductionCandidate(Record.readInt());
1958}
1959
1960void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1961 VisitFunctionDecl(D);
1962
1963 unsigned NumOverridenMethods = Record.readInt();
1964 if (D->isCanonicalDecl()) {
1965 while (NumOverridenMethods--) {
1966 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1967 // MD may be initializing.
1968 if (auto *MD = readDeclAs<CXXMethodDecl>())
1969 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1970 }
1971 } else {
1972 // We don't care about which declarations this used to override; we get
1973 // the relevant information from the canonical declaration.
1974 Record.skipInts(NumOverridenMethods);
1975 }
1976}
1977
1978void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1979 // We need the inherited constructor information to merge the declaration,
1980 // so we have to read it before we call VisitCXXMethodDecl.
1981 D->setExplicitSpecifier(Record.readExplicitSpec());
1982 if (D->isInheritingConstructor()) {
1983 auto *Shadow = readDeclAs<ConstructorUsingShadowDecl>();
1984 auto *Ctor = readDeclAs<CXXConstructorDecl>();
1985 *D->getTrailingObjects<InheritedConstructor>() =
1986 InheritedConstructor(Shadow, Ctor);
1987 }
1988
1989 VisitCXXMethodDecl(D);
1990}
1991
1992void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1993 VisitCXXMethodDecl(D);
1994
1995 if (auto *OperatorDelete = readDeclAs<FunctionDecl>()) {
1996 CXXDestructorDecl *Canon = D->getCanonicalDecl();
1997 auto *ThisArg = Record.readExpr();
1998 // FIXME: Check consistency if we have an old and new operator delete.
1999 if (!Canon->OperatorDelete) {
2000 Canon->OperatorDelete = OperatorDelete;
2001 Canon->OperatorDeleteThisArg = ThisArg;
2002 }
2003 }
2004}
2005
2006void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
2007 D->setExplicitSpecifier(Record.readExplicitSpec());
2008 VisitCXXMethodDecl(D);
2009}
2010
2011void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
2012 VisitDecl(D);
2013 D->ImportedModule = readModule();
2014 D->setImportComplete(Record.readInt());
2015 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2016 for (unsigned I = 0, N = Record.back(); I != N; ++I)
2017 StoredLocs[I] = readSourceLocation();
2018 Record.skipInts(1); // The number of stored source locations.
2019}
2020
2021void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
2022 VisitDecl(D);
2023 D->setColonLoc(readSourceLocation());
2024}
2025
2026void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
2027 VisitDecl(D);
2028 if (Record.readInt()) // hasFriendDecl
2029 D->Friend = readDeclAs<NamedDecl>();
2030 else
2031 D->Friend = readTypeSourceInfo();
2032 for (unsigned i = 0; i != D->NumTPLists; ++i)
2033 D->getTrailingObjects<TemplateParameterList *>()[i] =
2034 Record.readTemplateParameterList();
2035 D->NextFriend = readDeclID();
2036 D->UnsupportedFriend = (Record.readInt() != 0);
2037 D->FriendLoc = readSourceLocation();
2038}
2039
2040void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
2041 VisitDecl(D);
2042 unsigned NumParams = Record.readInt();
2043 D->NumParams = NumParams;
2044 D->Params = new TemplateParameterList*[NumParams];
2045 for (unsigned i = 0; i != NumParams; ++i)
2046 D->Params[i] = Record.readTemplateParameterList();
2047 if (Record.readInt()) // HasFriendDecl
2048 D->Friend = readDeclAs<NamedDecl>();
2049 else
2050 D->Friend = readTypeSourceInfo();
2051 D->FriendLoc = readSourceLocation();
2052}
2053
2054DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2055 VisitNamedDecl(D);
2056
2057 DeclID PatternID = readDeclID();
2058 auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2059 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2060 D->init(TemplatedDecl, TemplateParams);
2061
2062 return PatternID;
2063}
2064
2065void ASTDeclReader::VisitConceptDecl(ConceptDecl *D) {
2066 VisitTemplateDecl(D);
2067 D->ConstraintExpr = Record.readExpr();
2068 mergeMergeable(D);
2069}
2070
2071void ASTDeclReader::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) {
2072}
2073
2074ASTDeclReader::RedeclarableResult
2075ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2076 RedeclarableResult Redecl = VisitRedeclarable(D);
2077
2078 // Make sure we've allocated the Common pointer first. We do this before
2079 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2080 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2081 if (!CanonD->Common) {
2082 CanonD->Common = CanonD->newCommon(Reader.getContext());
2083 Reader.PendingDefinitions.insert(CanonD);
2084 }
2085 D->Common = CanonD->Common;
2086
2087 // If this is the first declaration of the template, fill in the information
2088 // for the 'common' pointer.
2089 if (ThisDeclID == Redecl.getFirstID()) {
2090 if (auto *RTD = readDeclAs<RedeclarableTemplateDecl>()) {
2091 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2092, __PRETTY_FUNCTION__))
2092 "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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2092, __PRETTY_FUNCTION__))
;
2093 D->setInstantiatedFromMemberTemplate(RTD);
2094 if (Record.readInt())
2095 D->setMemberSpecialization();
2096 }
2097 }
2098
2099 DeclID PatternID = VisitTemplateDecl(D);
2100 D->IdentifierNamespace = Record.readInt();
2101
2102 mergeRedeclarable(D, Redecl, PatternID);
2103
2104 // If we merged the template with a prior declaration chain, merge the common
2105 // pointer.
2106 // FIXME: Actually merge here, don't just overwrite.
2107 D->Common = D->getCanonicalDecl()->Common;
2108
2109 return Redecl;
2110}
2111
2112void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2113 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2114
2115 if (ThisDeclID == Redecl.getFirstID()) {
2116 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2117 // the specializations.
2118 SmallVector<serialization::DeclID, 32> SpecIDs;
2119 readDeclIDList(SpecIDs);
2120 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2121 }
2122
2123 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2124 // We were loaded before our templated declaration was. We've not set up
2125 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2126 // it now.
2127 Reader.getContext().getInjectedClassNameType(
2128 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2129 }
2130}
2131
2132void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2133 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2133)
;
2134}
2135
2136/// TODO: Unify with ClassTemplateDecl version?
2137/// May require unifying ClassTemplateDecl and
2138/// VarTemplateDecl beyond TemplateDecl...
2139void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2140 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2141
2142 if (ThisDeclID == Redecl.getFirstID()) {
2143 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2144 // the specializations.
2145 SmallVector<serialization::DeclID, 32> SpecIDs;
2146 readDeclIDList(SpecIDs);
2147 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2148 }
2149}
2150
2151ASTDeclReader::RedeclarableResult
2152ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2153 ClassTemplateSpecializationDecl *D) {
2154 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2155
2156 ASTContext &C = Reader.getContext();
2157 if (Decl *InstD = readDecl()) {
2158 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2159 D->SpecializedTemplate = CTD;
2160 } else {
2161 SmallVector<TemplateArgument, 8> TemplArgs;
2162 Record.readTemplateArgumentList(TemplArgs);
2163 TemplateArgumentList *ArgList
2164 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2165 auto *PS =
2166 new (C) ClassTemplateSpecializationDecl::
2167 SpecializedPartialSpecialization();
2168 PS->PartialSpecialization
2169 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2170 PS->TemplateArgs = ArgList;
2171 D->SpecializedTemplate = PS;
2172 }
2173 }
2174
2175 SmallVector<TemplateArgument, 8> TemplArgs;
2176 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2177 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2178 D->PointOfInstantiation = readSourceLocation();
2179 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2180
2181 bool writtenAsCanonicalDecl = Record.readInt();
2182 if (writtenAsCanonicalDecl) {
2183 auto *CanonPattern = readDeclAs<ClassTemplateDecl>();
2184 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2185 // Set this as, or find, the canonical declaration for this specialization
2186 ClassTemplateSpecializationDecl *CanonSpec;
2187 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2188 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2189 .GetOrInsertNode(Partial);
2190 } else {
2191 CanonSpec =
2192 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2193 }
2194 // If there was already a canonical specialization, merge into it.
2195 if (CanonSpec != D) {
2196 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2197
2198 // This declaration might be a definition. Merge with any existing
2199 // definition.
2200 if (auto *DDD = D->DefinitionData) {
2201 if (CanonSpec->DefinitionData)
2202 MergeDefinitionData(CanonSpec, std::move(*DDD));
2203 else
2204 CanonSpec->DefinitionData = D->DefinitionData;
2205 }
2206 D->DefinitionData = CanonSpec->DefinitionData;
2207 }
2208 }
2209 }
2210
2211 // Explicit info.
2212 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2213 auto *ExplicitInfo =
2214 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2215 ExplicitInfo->TypeAsWritten = TyInfo;
2216 ExplicitInfo->ExternLoc = readSourceLocation();
2217 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2218 D->ExplicitInfo = ExplicitInfo;
2219 }
2220
2221 return Redecl;
2222}
2223
2224void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2225 ClassTemplatePartialSpecializationDecl *D) {
2226 // We need to read the template params first because redeclarable is going to
2227 // need them for profiling
2228 TemplateParameterList *Params = Record.readTemplateParameterList();
2229 D->TemplateParams = Params;
2230 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2231
2232 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2233
2234 // These are read/set from/to the first declaration.
2235 if (ThisDeclID == Redecl.getFirstID()) {
2236 D->InstantiatedFromMember.setPointer(
2237 readDeclAs<ClassTemplatePartialSpecializationDecl>());
2238 D->InstantiatedFromMember.setInt(Record.readInt());
2239 }
2240}
2241
2242void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2243 ClassScopeFunctionSpecializationDecl *D) {
2244 VisitDecl(D);
2245 D->Specialization = readDeclAs<CXXMethodDecl>();
2246 if (Record.readInt())
2247 D->TemplateArgs = Record.readASTTemplateArgumentListInfo();
2248}
2249
2250void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2251 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2252
2253 if (ThisDeclID == Redecl.getFirstID()) {
2254 // This FunctionTemplateDecl owns a CommonPtr; read it.
2255 SmallVector<serialization::DeclID, 32> SpecIDs;
2256 readDeclIDList(SpecIDs);
2257 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2258 }
2259}
2260
2261/// TODO: Unify with ClassTemplateSpecializationDecl version?
2262/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2263/// VarTemplate(Partial)SpecializationDecl with a new data
2264/// structure Template(Partial)SpecializationDecl, and
2265/// using Template(Partial)SpecializationDecl as input type.
2266ASTDeclReader::RedeclarableResult
2267ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2268 VarTemplateSpecializationDecl *D) {
2269 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2270
2271 ASTContext &C = Reader.getContext();
2272 if (Decl *InstD = readDecl()) {
2273 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2274 D->SpecializedTemplate = VTD;
2275 } else {
2276 SmallVector<TemplateArgument, 8> TemplArgs;
2277 Record.readTemplateArgumentList(TemplArgs);
2278 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2279 C, TemplArgs);
2280 auto *PS =
2281 new (C)
2282 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2283 PS->PartialSpecialization =
2284 cast<VarTemplatePartialSpecializationDecl>(InstD);
2285 PS->TemplateArgs = ArgList;
2286 D->SpecializedTemplate = PS;
2287 }
2288 }
2289
2290 // Explicit info.
2291 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2292 auto *ExplicitInfo =
2293 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2294 ExplicitInfo->TypeAsWritten = TyInfo;
2295 ExplicitInfo->ExternLoc = readSourceLocation();
2296 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2297 D->ExplicitInfo = ExplicitInfo;
2298 }
2299
2300 SmallVector<TemplateArgument, 8> TemplArgs;
2301 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2302 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2303 D->PointOfInstantiation = readSourceLocation();
2304 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2305 D->IsCompleteDefinition = Record.readInt();
2306
2307 bool writtenAsCanonicalDecl = Record.readInt();
2308 if (writtenAsCanonicalDecl) {
2309 auto *CanonPattern = readDeclAs<VarTemplateDecl>();
2310 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2311 // FIXME: If it's already present, merge it.
2312 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2313 CanonPattern->getCommonPtr()->PartialSpecializations
2314 .GetOrInsertNode(Partial);
2315 } else {
2316 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2317 }
2318 }
2319 }
2320
2321 return Redecl;
2322}
2323
2324/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2325/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2326/// VarTemplate(Partial)SpecializationDecl with a new data
2327/// structure Template(Partial)SpecializationDecl, and
2328/// using Template(Partial)SpecializationDecl as input type.
2329void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2330 VarTemplatePartialSpecializationDecl *D) {
2331 TemplateParameterList *Params = Record.readTemplateParameterList();
2332 D->TemplateParams = Params;
2333 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2334
2335 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2336
2337 // These are read/set from/to the first declaration.
2338 if (ThisDeclID == Redecl.getFirstID()) {
2339 D->InstantiatedFromMember.setPointer(
2340 readDeclAs<VarTemplatePartialSpecializationDecl>());
2341 D->InstantiatedFromMember.setInt(Record.readInt());
2342 }
2343}
2344
2345void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2346 VisitTypeDecl(D);
2347
2348 D->setDeclaredWithTypename(Record.readInt());
2349
2350 if (Record.readBool()) {
2351 NestedNameSpecifierLoc NNS = Record.readNestedNameSpecifierLoc();
2352 DeclarationNameInfo DN = Record.readDeclarationNameInfo();
2353 ConceptDecl *NamedConcept = Record.readDeclAs<ConceptDecl>();
2354 const ASTTemplateArgumentListInfo *ArgsAsWritten = nullptr;
2355 if (Record.readBool())
2356 ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2357 Expr *ImmediatelyDeclaredConstraint = Record.readExpr();
2358 D->setTypeConstraint(NNS, DN, /*FoundDecl=*/nullptr, NamedConcept,
2359 ArgsAsWritten, ImmediatelyDeclaredConstraint);
2360 if ((D->ExpandedParameterPack = Record.readInt()))
2361 D->NumExpanded = Record.readInt();
2362 }
2363
2364 if (Record.readInt())
2365 D->setDefaultArgument(readTypeSourceInfo());
2366}
2367
2368void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2369 VisitDeclaratorDecl(D);
2370 // TemplateParmPosition.
2371 D->setDepth(Record.readInt());
2372 D->setPosition(Record.readInt());
2373 if (D->hasPlaceholderTypeConstraint())
2374 D->setPlaceholderTypeConstraint(Record.readExpr());
2375 if (D->isExpandedParameterPack()) {
2376 auto TypesAndInfos =
2377 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2378 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2379 new (&TypesAndInfos[I].first) QualType(Record.readType());
2380 TypesAndInfos[I].second = readTypeSourceInfo();
2381 }
2382 } else {
2383 // Rest of NonTypeTemplateParmDecl.
2384 D->ParameterPack = Record.readInt();
2385 if (Record.readInt())
2386 D->setDefaultArgument(Record.readExpr());
2387 }
2388}
2389
2390void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2391 VisitTemplateDecl(D);
2392 // TemplateParmPosition.
2393 D->setDepth(Record.readInt());
2394 D->setPosition(Record.readInt());
2395 if (D->isExpandedParameterPack()) {
2396 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2397 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2398 I != N; ++I)
2399 Data[I] = Record.readTemplateParameterList();
2400 } else {
2401 // Rest of TemplateTemplateParmDecl.
2402 D->ParameterPack = Record.readInt();
2403 if (Record.readInt())
2404 D->setDefaultArgument(Reader.getContext(),
2405 Record.readTemplateArgumentLoc());
2406 }
2407}
2408
2409void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2410 VisitRedeclarableTemplateDecl(D);
2411}
2412
2413void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2414 VisitDecl(D);
2415 D->AssertExprAndFailed.setPointer(Record.readExpr());
2416 D->AssertExprAndFailed.setInt(Record.readInt());
2417 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2418 D->RParenLoc = readSourceLocation();
2419}
2420
2421void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2422 VisitDecl(D);
2423}
2424
2425void ASTDeclReader::VisitLifetimeExtendedTemporaryDecl(
2426 LifetimeExtendedTemporaryDecl *D) {
2427 VisitDecl(D);
2428 D->ExtendingDecl = readDeclAs<ValueDecl>();
2429 D->ExprWithTemporary = Record.readStmt();
2430 if (Record.readInt()) {
2431 D->Value = new (D->getASTContext()) APValue(Record.readAPValue());
2432 D->getASTContext().addDestruction(D->Value);
2433 }
2434 D->ManglingNumber = Record.readInt();
2435 mergeMergeable(D);
2436}
2437
2438std::pair<uint64_t, uint64_t>
2439ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2440 uint64_t LexicalOffset = ReadLocalOffset();
2441 uint64_t VisibleOffset = ReadLocalOffset();
2442 return std::make_pair(LexicalOffset, VisibleOffset);
2443}
2444
2445template <typename T>
2446ASTDeclReader::RedeclarableResult
2447ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2448 DeclID FirstDeclID = readDeclID();
2449 Decl *MergeWith = nullptr;
2450
2451 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2452 bool IsFirstLocalDecl = false;
2453
2454 uint64_t RedeclOffset = 0;
2455
2456 // 0 indicates that this declaration was the only declaration of its entity,
2457 // and is used for space optimization.
2458 if (FirstDeclID == 0) {
2459 FirstDeclID = ThisDeclID;
2460 IsKeyDecl = true;
2461 IsFirstLocalDecl = true;
2462 } else if (unsigned N = Record.readInt()) {
2463 // This declaration was the first local declaration, but may have imported
2464 // other declarations.
2465 IsKeyDecl = N == 1;
2466 IsFirstLocalDecl = true;
2467
2468 // We have some declarations that must be before us in our redeclaration
2469 // chain. Read them now, and remember that we ought to merge with one of
2470 // them.
2471 // FIXME: Provide a known merge target to the second and subsequent such
2472 // declaration.
2473 for (unsigned I = 0; I != N - 1; ++I)
2474 MergeWith = readDecl();
2475
2476 RedeclOffset = ReadLocalOffset();
2477 } else {
2478 // This declaration was not the first local declaration. Read the first
2479 // local declaration now, to trigger the import of other redeclarations.
2480 (void)readDecl();
2481 }
2482
2483 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2484 if (FirstDecl != D) {
2485 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2486 // We temporarily set the first (canonical) declaration as the previous one
2487 // which is the one that matters and mark the real previous DeclID to be
2488 // loaded & attached later on.
2489 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2490 D->First = FirstDecl->getCanonicalDecl();
2491 }
2492
2493 auto *DAsT = static_cast<T *>(D);
2494
2495 // Note that we need to load local redeclarations of this decl and build a
2496 // decl chain for them. This must happen *after* we perform the preloading
2497 // above; this ensures that the redeclaration chain is built in the correct
2498 // order.
2499 if (IsFirstLocalDecl)
2500 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2501
2502 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2503}
2504
2505/// Attempts to merge the given declaration (D) with another declaration
2506/// of the same entity.
2507template<typename T>
2508void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2509 RedeclarableResult &Redecl,
2510 DeclID TemplatePatternID) {
2511 // If modules are not available, there is no reason to perform this merge.
2512 if (!Reader.getContext().getLangOpts().Modules)
2513 return;
2514
2515 // If we're not the canonical declaration, we don't need to merge.
2516 if (!DBase->isFirstDecl())
2517 return;
2518
2519 auto *D = static_cast<T *>(DBase);
2520
2521 if (auto *Existing = Redecl.getKnownMergeTarget())
2522 // We already know of an existing declaration we should merge with.
2523 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2524 else if (FindExistingResult ExistingRes = findExisting(D))
2525 if (T *Existing = ExistingRes)
2526 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2527}
2528
2529/// "Cast" to type T, asserting if we don't have an implicit conversion.
2530/// We use this to put code in a template that will only be valid for certain
2531/// instantiations.
2532template<typename T> static T assert_cast(T t) { return t; }
2533template<typename T> static T assert_cast(...) {
2534 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2534)
;
2535}
2536
2537/// Merge together the pattern declarations from two template
2538/// declarations.
2539void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2540 RedeclarableTemplateDecl *Existing,
2541 DeclID DsID, bool IsKeyDecl) {
2542 auto *DPattern = D->getTemplatedDecl();
2543 auto *ExistingPattern = Existing->getTemplatedDecl();
2544 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2545 DPattern->getCanonicalDecl()->getGlobalID(),
2546 IsKeyDecl);
2547
2548 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2549 // Merge with any existing definition.
2550 // FIXME: This is duplicated in several places. Refactor.
2551 auto *ExistingClass =
2552 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2553 if (auto *DDD = DClass->DefinitionData) {
2554 if (ExistingClass->DefinitionData) {
2555 MergeDefinitionData(ExistingClass, std::move(*DDD));
2556 } else {
2557 ExistingClass->DefinitionData = DClass->DefinitionData;
2558 // We may have skipped this before because we thought that DClass
2559 // was the canonical declaration.
2560 Reader.PendingDefinitions.insert(DClass);
2561 }
2562 }
2563 DClass->DefinitionData = ExistingClass->DefinitionData;
2564
2565 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2566 Result);
2567 }
2568 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2569 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2570 Result);
2571 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2572 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2573 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2574 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2575 Result);
2576 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2576)
;
2577}
2578
2579/// Attempts to merge the given declaration (D) with another declaration
2580/// of the same entity.
2581template<typename T>
2582void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2583 RedeclarableResult &Redecl,
2584 DeclID TemplatePatternID) {
2585 auto *D = static_cast<T *>(DBase);
2586 T *ExistingCanon = Existing->getCanonicalDecl();
2587 T *DCanon = D->getCanonicalDecl();
2588 if (ExistingCanon != DCanon) {
2589 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2590, __PRETTY_FUNCTION__))
2590 "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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2590, __PRETTY_FUNCTION__))
;
2591
2592 // Have our redeclaration link point back at the canonical declaration
2593 // of the existing declaration, so that this declaration has the
2594 // appropriate canonical declaration.
2595 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2596 D->First = ExistingCanon;
2597 ExistingCanon->Used |= D->Used;
2598 D->Used = false;
2599
2600 // When we merge a namespace, update its pointer to the first namespace.
2601 // We cannot have loaded any redeclarations of this declaration yet, so
2602 // there's nothing else that needs to be updated.
2603 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2604 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2605 assert_cast<NamespaceDecl*>(ExistingCanon));
2606
2607 // When we merge a template, merge its pattern.
2608 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2609 mergeTemplatePattern(
2610 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2611 TemplatePatternID, Redecl.isKeyDecl());
2612
2613 // If this declaration is a key declaration, make a note of that.
2614 if (Redecl.isKeyDecl())
2615 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2616 }
2617}
2618
2619/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2620/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2621/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2622/// that some types are mergeable during deserialization, otherwise name
2623/// lookup fails. This is the case for EnumConstantDecl.
2624static bool allowODRLikeMergeInC(NamedDecl *ND) {
2625 if (!ND)
2626 return false;
2627 // TODO: implement merge for other necessary decls.
2628 if (isa<EnumConstantDecl>(ND))
2629 return true;
2630 return false;
2631}
2632
2633/// Attempts to merge LifetimeExtendedTemporaryDecl with
2634/// identical class definitions from two different modules.
2635void ASTDeclReader::mergeMergeable(LifetimeExtendedTemporaryDecl *D) {
2636 // If modules are not available, there is no reason to perform this merge.
2637 if (!Reader.getContext().getLangOpts().Modules)
2638 return;
2639
2640 LifetimeExtendedTemporaryDecl *LETDecl = D;
2641
2642 LifetimeExtendedTemporaryDecl *&LookupResult =
2643 Reader.LETemporaryForMerging[std::make_pair(
2644 LETDecl->getExtendingDecl(), LETDecl->getManglingNumber())];
2645 if (LookupResult)
2646 Reader.getContext().setPrimaryMergedDecl(LETDecl,
2647 LookupResult->getCanonicalDecl());
2648 else
2649 LookupResult = LETDecl;
2650}
2651
2652/// Attempts to merge the given declaration (D) with another declaration
2653/// of the same entity, for the case where the entity is not actually
2654/// redeclarable. This happens, for instance, when merging the fields of
2655/// identical class definitions from two different modules.
2656template<typename T>
2657void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2658 // If modules are not available, there is no reason to perform this merge.
2659 if (!Reader.getContext().getLangOpts().Modules)
1
Assuming field 'Modules' is not equal to 0
2
Taking false branch
2660 return;
2661
2662 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2663 // Note that C identically-named things in different translation units are
2664 // not redeclarations, but may still have compatible types, where ODR-like
2665 // semantics may apply.
2666 if (!Reader.getContext().getLangOpts().CPlusPlus &&
3
Assuming field 'CPlusPlus' is not equal to 0
2667 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2668 return;
2669
2670 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
4
Calling 'ASTDeclReader::findExisting'
2671 if (T *Existing = ExistingRes)
2672 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2673 Existing->getCanonicalDecl());
2674}
2675
2676void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2677 Record.readOMPChildren(D->Data);
2678 VisitDecl(D);
2679}
2680
2681void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2682 Record.readOMPChildren(D->Data);
2683 VisitDecl(D);
2684}
2685
2686void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
2687 Record.readOMPChildren(D->Data);
2688 VisitDecl(D);
2689}
2690
2691void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2692 VisitValueDecl(D);
2693 D->setLocation(readSourceLocation());
2694 Expr *In = Record.readExpr();
2695 Expr *Out = Record.readExpr();
2696 D->setCombinerData(In, Out);
2697 Expr *Combiner = Record.readExpr();
2698 D->setCombiner(Combiner);
2699 Expr *Orig = Record.readExpr();
2700 Expr *Priv = Record.readExpr();
2701 D->setInitializerData(Orig, Priv);
2702 Expr *Init = Record.readExpr();
2703 auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2704 D->setInitializer(Init, IK);
2705 D->PrevDeclInScope = readDeclID();
2706}
2707
2708void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2709 Record.readOMPChildren(D->Data);
2710 VisitValueDecl(D);
2711 D->VarName = Record.readDeclarationName();
2712 D->PrevDeclInScope = readDeclID();
2713}
2714
2715void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2716 VisitVarDecl(D);
2717}
2718
2719//===----------------------------------------------------------------------===//
2720// Attribute Reading
2721//===----------------------------------------------------------------------===//
2722
2723namespace {
2724class AttrReader {
2725 ASTRecordReader &Reader;
2726
2727public:
2728 AttrReader(ASTRecordReader &Reader) : Reader(Reader) {}
2729
2730 uint64_t readInt() {
2731 return Reader.readInt();
2732 }
2733
2734 SourceRange readSourceRange() {
2735 return Reader.readSourceRange();
2736 }
2737
2738 SourceLocation readSourceLocation() {
2739 return Reader.readSourceLocation();
2740 }
2741
2742 Expr *readExpr() { return Reader.readExpr(); }
2743
2744 std::string readString() {
2745 return Reader.readString();
2746 }
2747
2748 TypeSourceInfo *readTypeSourceInfo() {
2749 return Reader.readTypeSourceInfo();
2750 }
2751
2752 IdentifierInfo *readIdentifier() {
2753 return Reader.readIdentifier();
2754 }
2755
2756 VersionTuple readVersionTuple() {
2757 return Reader.readVersionTuple();
2758 }
2759
2760 OMPTraitInfo *readOMPTraitInfo() { return Reader.readOMPTraitInfo(); }
2761
2762 template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2763 return Reader.GetLocalDeclAs<T>(LocalID);
2764 }
2765};
2766}
2767
2768Attr *ASTRecordReader::readAttr() {
2769 AttrReader Record(*this);
2770 auto V = Record.readInt();
2771 if (!V)
2772 return nullptr;
2773
2774 Attr *New = nullptr;
2775 // Kind is stored as a 1-based integer because 0 is used to indicate a null
2776 // Attr pointer.
2777 auto Kind = static_cast<attr::Kind>(V - 1);
2778 ASTContext &Context = getContext();
2779
2780 IdentifierInfo *AttrName = Record.readIdentifier();
2781 IdentifierInfo *ScopeName = Record.readIdentifier();
2782 SourceRange AttrRange = Record.readSourceRange();
2783 SourceLocation ScopeLoc = Record.readSourceLocation();
2784 unsigned ParsedKind = Record.readInt();
2785 unsigned Syntax = Record.readInt();
2786 unsigned SpellingIndex = Record.readInt();
2787
2788 AttributeCommonInfo Info(AttrName, ScopeName, AttrRange, ScopeLoc,
2789 AttributeCommonInfo::Kind(ParsedKind),
2790 AttributeCommonInfo::Syntax(Syntax), SpellingIndex);
2791
2792#include "clang/Serialization/AttrPCHRead.inc"
2793
2794 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2794, __PRETTY_FUNCTION__))
;
2795 return New;
2796}
2797
2798/// Reads attributes from the current stream position.
2799void ASTRecordReader::readAttributes(AttrVec &Attrs) {
2800 for (unsigned I = 0, E = readInt(); I != E; ++I)
2801 Attrs.push_back(readAttr());
2802}
2803
2804//===----------------------------------------------------------------------===//
2805// ASTReader Implementation
2806//===----------------------------------------------------------------------===//
2807
2808/// Note that we have loaded the declaration with the given
2809/// Index.
2810///
2811/// This routine notes that this declaration has already been loaded,
2812/// so that future GetDecl calls will return this declaration rather
2813/// than trying to load a new declaration.
2814inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2815 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2815, __PRETTY_FUNCTION__))
;
2816 DeclsLoaded[Index] = D;
2817}
2818
2819/// Determine whether the consumer will be interested in seeing
2820/// this declaration (via HandleTopLevelDecl).
2821///
2822/// This routine should return true for anything that might affect
2823/// code generation, e.g., inline function definitions, Objective-C
2824/// declarations with metadata, etc.
2825static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2826 // An ObjCMethodDecl is never considered as "interesting" because its
2827 // implementation container always is.
2828
2829 // An ImportDecl or VarDecl imported from a module map module will get
2830 // emitted when we import the relevant module.
2831 if (isPartOfPerModuleInitializer(D)) {
2832 auto *M = D->getImportedOwningModule();
2833 if (M && M->Kind == Module::ModuleMapModule &&
2834 Ctx.DeclMustBeEmitted(D))
2835 return false;
2836 }
2837
2838 if (isa<FileScopeAsmDecl>(D) ||
2839 isa<ObjCProtocolDecl>(D) ||
2840 isa<ObjCImplDecl>(D) ||
2841 isa<ImportDecl>(D) ||
2842 isa<PragmaCommentDecl>(D) ||
2843 isa<PragmaDetectMismatchDecl>(D))
2844 return true;
2845 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2846 isa<OMPDeclareMapperDecl>(D) || isa<OMPAllocateDecl>(D) ||
2847 isa<OMPRequiresDecl>(D))
2848 return !D->getDeclContext()->isFunctionOrMethod();
2849 if (const auto *Var = dyn_cast<VarDecl>(D))
2850 return Var->isFileVarDecl() &&
2851 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2852 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2853 if (const auto *Func = dyn_cast<FunctionDecl>(D))
2854 return Func->doesThisDeclarationHaveABody() || HasBody;
2855
2856 if (auto *ES = D->getASTContext().getExternalSource())
2857 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2858 return true;
2859
2860 return false;
2861}
2862
2863/// Get the correct cursor and offset for loading a declaration.
2864ASTReader::RecordLocation
2865ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2866 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2867 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2867, __PRETTY_FUNCTION__))
;
2868 ModuleFile *M = I->second;
2869 const DeclOffset &DOffs =
2870 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2871 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2872 return RecordLocation(M, DOffs.getBitOffset(M->DeclsBlockStartOffset));
2873}
2874
2875ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2876 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2877
2878 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2878, __PRETTY_FUNCTION__))
;
2879 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2880}
2881
2882uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint64_t LocalOffset) {
2883 return LocalOffset + M.GlobalBitOffset;
2884}
2885
2886static bool isSameTemplateParameterList(const ASTContext &C,
2887 const TemplateParameterList *X,
2888 const TemplateParameterList *Y);
2889
2890/// Determine whether two template parameters are similar enough
2891/// that they may be used in declarations of the same template.
2892static bool isSameTemplateParameter(const NamedDecl *X,
2893 const NamedDecl *Y) {
2894 if (X->getKind() != Y->getKind())
2895 return false;
2896
2897 if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2898 const auto *TY = cast<TemplateTypeParmDecl>(Y);
2899 if (TX->isParameterPack() != TY->isParameterPack())
2900 return false;
2901 if (TX->hasTypeConstraint() != TY->hasTypeConstraint())
2902 return false;
2903 const TypeConstraint *TXTC = TX->getTypeConstraint();
2904 const TypeConstraint *TYTC = TY->getTypeConstraint();
2905 if (!TXTC != !TYTC)
2906 return false;
2907 if (TXTC && TYTC) {
2908 if (TXTC->getNamedConcept() != TYTC->getNamedConcept())
2909 return false;
2910 if (TXTC->hasExplicitTemplateArgs() != TYTC->hasExplicitTemplateArgs())
2911 return false;
2912 if (TXTC->hasExplicitTemplateArgs()) {
2913 const auto *TXTCArgs = TXTC->getTemplateArgsAsWritten();
2914 const auto *TYTCArgs = TYTC->getTemplateArgsAsWritten();
2915 if (TXTCArgs->NumTemplateArgs != TYTCArgs->NumTemplateArgs)
2916 return false;
2917 llvm::FoldingSetNodeID XID, YID;
2918 for (const auto &ArgLoc : TXTCArgs->arguments())
2919 ArgLoc.getArgument().Profile(XID, X->getASTContext());
2920 for (const auto &ArgLoc : TYTCArgs->arguments())
2921 ArgLoc.getArgument().Profile(YID, Y->getASTContext());
2922 if (XID != YID)
2923 return false;
2924 }
2925 }
2926 return true;
2927 }
2928
2929 if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2930 const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2931 return TX->isParameterPack() == TY->isParameterPack() &&
2932 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2933 }
2934
2935 const auto *TX = cast<TemplateTemplateParmDecl>(X);
2936 const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2937 return TX->isParameterPack() == TY->isParameterPack() &&
2938 isSameTemplateParameterList(TX->getASTContext(),
2939 TX->getTemplateParameters(),
2940 TY->getTemplateParameters());
2941}
2942
2943static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2944 if (auto *NS = X->getAsNamespace())
2945 return NS;
2946 if (auto *NAS = X->getAsNamespaceAlias())
2947 return NAS->getNamespace();
2948 return nullptr;
2949}
2950
2951static bool isSameQualifier(const NestedNameSpecifier *X,
2952 const NestedNameSpecifier *Y) {
2953 if (auto *NSX = getNamespace(X)) {
2954 auto *NSY = getNamespace(Y);
2955 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2956 return false;
2957 } else if (X->getKind() != Y->getKind())
2958 return false;
2959
2960 // FIXME: For namespaces and types, we're permitted to check that the entity
2961 // is named via the same tokens. We should probably do so.
2962 switch (X->getKind()) {
2963 case NestedNameSpecifier::Identifier:
2964 if (X->getAsIdentifier() != Y->getAsIdentifier())
2965 return false;
2966 break;
2967 case NestedNameSpecifier::Namespace:
2968 case NestedNameSpecifier::NamespaceAlias:
2969 // We've already checked that we named the same namespace.
2970 break;
2971 case NestedNameSpecifier::TypeSpec:
2972 case NestedNameSpecifier::TypeSpecWithTemplate:
2973 if (X->getAsType()->getCanonicalTypeInternal() !=
2974 Y->getAsType()->getCanonicalTypeInternal())
2975 return false;
2976 break;
2977 case NestedNameSpecifier::Global:
2978 case NestedNameSpecifier::Super:
2979 return true;
2980 }
2981
2982 // Recurse into earlier portion of NNS, if any.
2983 auto *PX = X->getPrefix();
2984 auto *PY = Y->getPrefix();
2985 if (PX && PY)
2986 return isSameQualifier(PX, PY);
2987 return !PX && !PY;
2988}
2989
2990/// Determine whether two template parameter lists are similar enough
2991/// that they may be used in declarations of the same template.
2992static bool isSameTemplateParameterList(const ASTContext &C,
2993 const TemplateParameterList *X,
2994 const TemplateParameterList *Y) {
2995 if (X->size() != Y->size())
2996 return false;
2997
2998 for (unsigned I = 0, N = X->size(); I != N; ++I)
2999 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
3000 return false;
3001
3002 const Expr *XRC = X->getRequiresClause();
3003 const Expr *YRC = Y->getRequiresClause();
3004 if (!XRC != !YRC)
3005 return false;
3006 if (XRC) {
3007 llvm::FoldingSetNodeID XRCID, YRCID;
3008 XRC->Profile(XRCID, C, /*Canonical=*/true);
3009 YRC->Profile(YRCID, C, /*Canonical=*/true);
3010 if (XRCID != YRCID)
3011 return false;
3012 }
3013
3014 return true;
3015}
3016
3017/// Determine whether the attributes we can overload on are identical for A and
3018/// B. Will ignore any overloadable attrs represented in the type of A and B.
3019static bool hasSameOverloadableAttrs(const FunctionDecl *A,
3020 const FunctionDecl *B) {
3021 // Note that pass_object_size attributes are represented in the function's
3022 // ExtParameterInfo, so we don't need to check them here.
3023
3024 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
3025 auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
3026 auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
3027
3028 for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
3029 Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
3030 Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
3031
3032 // Return false if the number of enable_if attributes is different.
3033 if (!Cand1A || !Cand2A)
3034 return false;
3035
3036 Cand1ID.clear();
3037 Cand2ID.clear();
3038
3039 (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
3040 (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
3041
3042 // Return false if any of the enable_if expressions of A and B are
3043 // different.
3044 if (Cand1ID != Cand2ID)
3045 return false;
3046 }
3047 return true;
3048}
3049
3050/// Determine whether the two declarations refer to the same entity.pr
3051static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
3052 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3052, __PRETTY_FUNCTION__))
;
3053
3054 if (X == Y)
3055 return true;
3056
3057 // Must be in the same context.
3058 //
3059 // Note that we can't use DeclContext::Equals here, because the DeclContexts
3060 // could be two different declarations of the same function. (We will fix the
3061 // semantic DC to refer to the primary definition after merging.)
3062 if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
3063 cast<Decl>(Y->getDeclContext()->getRedeclContext())))
3064 return false;
3065
3066 // Two typedefs refer to the same entity if they have the same underlying
3067 // type.
3068 if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
3069 if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
3070 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
3071 TypedefY->getUnderlyingType());
3072
3073 // Must have the same kind.
3074 if (X->getKind() != Y->getKind())
3075 return false;
3076
3077 // Objective-C classes and protocols with the same name always match.
3078 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
3079 return true;
3080
3081 if (isa<ClassTemplateSpecializationDecl>(X)) {
3082 // No need to handle these here: we merge them when adding them to the
3083 // template.
3084 return false;
3085 }
3086
3087 // Compatible tags match.
3088 if (const auto *TagX = dyn_cast<TagDecl>(X)) {
3089 const auto *TagY = cast<TagDecl>(Y);
3090 return (TagX->getTagKind() == TagY->getTagKind()) ||
3091 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
3092 TagX->getTagKind() == TTK_Interface) &&
3093 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
3094 TagY->getTagKind() == TTK_Interface));
3095 }
3096
3097 // Functions with the same type and linkage match.
3098 // FIXME: This needs to cope with merging of prototyped/non-prototyped
3099 // functions, etc.
3100 if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
3101 const auto *FuncY = cast<FunctionDecl>(Y);
3102 if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
3103 const auto *CtorY = cast<CXXConstructorDecl>(Y);
3104 if (CtorX->getInheritedConstructor() &&
3105 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
3106 CtorY->getInheritedConstructor().getConstructor()))
3107 return false;
3108 }
3109
3110 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3111 return false;
3112
3113 // Multiversioned functions with different feature strings are represented
3114 // as separate declarations.
3115 if (FuncX->isMultiVersion()) {
3116 const auto *TAX = FuncX->getAttr<TargetAttr>();
3117 const auto *TAY = FuncY->getAttr<TargetAttr>();
3118 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3118, __PRETTY_FUNCTION__))
;
3119
3120 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3121 return false;
3122 }
3123
3124 ASTContext &C = FuncX->getASTContext();
3125
3126 const Expr *XRC = FuncX->getTrailingRequiresClause();
3127 const Expr *YRC = FuncY->getTrailingRequiresClause();
3128 if (!XRC != !YRC)
3129 return false;
3130 if (XRC) {
3131 llvm::FoldingSetNodeID XRCID, YRCID;
3132 XRC->Profile(XRCID, C, /*Canonical=*/true);
3133 YRC->Profile(YRCID, C, /*Canonical=*/true);
3134 if (XRCID != YRCID)
3135 return false;
3136 }
3137
3138 auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3139 // Map to the first declaration that we've already merged into this one.
3140 // The TSI of redeclarations might not match (due to calling conventions
3141 // being inherited onto the type but not the TSI), but the TSI type of
3142 // the first declaration of the function should match across modules.
3143 FD = FD->getCanonicalDecl();
3144 return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3145 : FD->getType();
3146 };
3147 QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3148 if (!C.hasSameType(XT, YT)) {
3149 // We can get functions with different types on the redecl chain in C++17
3150 // if they have differing exception specifications and at least one of
3151 // the excpetion specs is unresolved.
3152 auto *XFPT = XT->getAs<FunctionProtoType>();
3153 auto *YFPT = YT->getAs<FunctionProtoType>();
3154 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3155 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3156 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
3157 C.hasSameFunctionTypeIgnoringExceptionSpec(XT, YT))
3158 return true;
3159 return false;
3160 }
3161
3162 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3163 hasSameOverloadableAttrs(FuncX, FuncY);
3164 }
3165
3166 // Variables with the same type and linkage match.
3167 if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3168 const auto *VarY = cast<VarDecl>(Y);
3169 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3170 ASTContext &C = VarX->getASTContext();
3171 if (C.hasSameType(VarX->getType(), VarY->getType()))
3172 return true;
3173
3174 // We can get decls with different types on the redecl chain. Eg.
3175 // template <typename T> struct S { static T Var[]; }; // #1
3176 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3177 // Only? happens when completing an incomplete array type. In this case
3178 // when comparing #1 and #2 we should go through their element type.
3179 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3180 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3181 if (!VarXTy || !VarYTy)
3182 return false;
3183 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3184 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3185 }
3186 return false;
3187 }
3188
3189 // Namespaces with the same name and inlinedness match.
3190 if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3191 const auto *NamespaceY = cast<NamespaceDecl>(Y);
3192 return NamespaceX->isInline() == NamespaceY->isInline();
3193 }
3194
3195 // Identical template names and kinds match if their template parameter lists
3196 // and patterns match.
3197 if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3198 const auto *TemplateY = cast<TemplateDecl>(Y);
3199 return isSameEntity(TemplateX->getTemplatedDecl(),
3200 TemplateY->getTemplatedDecl()) &&
3201 isSameTemplateParameterList(TemplateX->getASTContext(),
3202 TemplateX->getTemplateParameters(),
3203 TemplateY->getTemplateParameters());
3204 }
3205
3206 // Fields with the same name and the same type match.
3207 if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3208 const auto *FDY = cast<FieldDecl>(Y);
3209 // FIXME: Also check the bitwidth is odr-equivalent, if any.
3210 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3211 }
3212
3213 // Indirect fields with the same target field match.
3214 if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3215 const auto *IFDY = cast<IndirectFieldDecl>(Y);
3216 return IFDX->getAnonField()->getCanonicalDecl() ==
3217 IFDY->getAnonField()->getCanonicalDecl();
3218 }
3219
3220 // Enumerators with the same name match.
3221 if (isa<EnumConstantDecl>(X))
3222 // FIXME: Also check the value is odr-equivalent.
3223 return true;
3224
3225 // Using shadow declarations with the same target match.
3226 if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3227 const auto *USY = cast<UsingShadowDecl>(Y);
3228 return USX->getTargetDecl() == USY->getTargetDecl();
3229 }
3230
3231 // Using declarations with the same qualifier match. (We already know that
3232 // the name matches.)
3233 if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3234 const auto *UY = cast<UsingDecl>(Y);
3235 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3236 UX->hasTypename() == UY->hasTypename() &&
3237 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3238 }
3239 if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3240 const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3241 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3242 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3243 }
3244 if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3245 return isSameQualifier(
3246 UX->getQualifier(),
3247 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3248
3249 // Namespace alias definitions with the same target match.
3250 if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3251 const auto *NAY = cast<NamespaceAliasDecl>(Y);
3252 return NAX->getNamespace()->Equals(NAY->getNamespace());
3253 }
3254
3255 return false;
3256}
3257
3258/// Find the context in which we should search for previous declarations when
3259/// looking for declarations to merge.
3260DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3261 DeclContext *DC) {
3262 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3263 return ND->getOriginalNamespace();
3264
3265 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3266 // Try to dig out the definition.
3267 auto *DD = RD->DefinitionData;
3268 if (!DD)
3269 DD = RD->getCanonicalDecl()->DefinitionData;
3270
3271 // If there's no definition yet, then DC's definition is added by an update
3272 // record, but we've not yet loaded that update record. In this case, we
3273 // commit to DC being the canonical definition now, and will fix this when
3274 // we load the update record.
3275 if (!DD) {
3276 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3277 RD->setCompleteDefinition(true);
3278 RD->DefinitionData = DD;
3279 RD->getCanonicalDecl()->DefinitionData = DD;
3280
3281 // Track that we did this horrible thing so that we can fix it later.
3282 Reader.PendingFakeDefinitionData.insert(
3283 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3284 }
3285
3286 return DD->Definition;
3287 }
3288
3289 if (auto *ED = dyn_cast<EnumDecl>(DC))
3290 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3291 : nullptr;
3292
3293 // We can see the TU here only if we have no Sema object. In that case,
3294 // there's no TU scope to look in, so using the DC alone is sufficient.
3295 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3296 return TU;
3297
3298 return nullptr;
3299}
3300
3301ASTDeclReader::FindExistingResult::~FindExistingResult() {
3302 // Record that we had a typedef name for linkage whether or not we merge
3303 // with that declaration.
3304 if (TypedefNameForLinkage) {
3305 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3306 Reader.ImportedTypedefNamesForLinkage.insert(
3307 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3308 return;
3309 }
3310
3311 if (!AddResult || Existing)
3312 return;
3313
3314 DeclarationName Name = New->getDeclName();
3315 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3316 if (needsAnonymousDeclarationNumber(New)) {
3317 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3318 AnonymousDeclNumber, New);
3319 } else if (DC->isTranslationUnit() &&
3320 !Reader.getContext().getLangOpts().CPlusPlus) {
3321 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3322 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3323 .push_back(New);
3324 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3325 // Add the declaration to its redeclaration context so later merging
3326 // lookups will find it.
3327 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3328 }
3329}
3330
3331/// Find the declaration that should be merged into, given the declaration found
3332/// by name lookup. If we're merging an anonymous declaration within a typedef,
3333/// we need a matching typedef, and we merge with the type inside it.
3334static NamedDecl *getDeclForMerging(NamedDecl *Found,
3335 bool IsTypedefNameForLinkage) {
3336 if (!IsTypedefNameForLinkage)
3337 return Found;
3338
3339 // If we found a typedef declaration that gives a name to some other
3340 // declaration, then we want that inner declaration. Declarations from
3341 // AST files are handled via ImportedTypedefNamesForLinkage.
3342 if (Found->isFromASTFile())
3343 return nullptr;
3344
3345 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3346 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3347
3348 return nullptr;
3349}
3350
3351/// Find the declaration to use to populate the anonymous declaration table
3352/// for the given lexical DeclContext. We only care about finding local
3353/// definitions of the context; we'll merge imported ones as we go.
3354DeclContext *
3355ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3356 // For classes, we track the definition as we merge.
3357 if (auto *RD
16.1
'RD' is null
= dyn_cast<CXXRecordDecl>(LexicalDC)) {
16
Assuming 'LexicalDC' is not a 'CXXRecordDecl'
17
Taking false branch
3358 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3359 return DD ? DD->Definition : nullptr;
3360 }
3361
3362 // For anything else, walk its merged redeclarations looking for a definition.
3363 // Note that we can't just call getDefinition here because the redeclaration
3364 // chain isn't wired up.
3365 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++'
3366 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
3367 if (FD->isThisDeclarationADefinition())
3368 return FD;
3369 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
3370 if (MD->isThisDeclarationADefinition())
3371 return MD;
3372 }
3373
3374 // No merged definition yet.
3375 return nullptr;
3376}
3377
3378NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3379 DeclContext *DC,
3380 unsigned Index) {
3381 // If the lexical context has been merged, look into the now-canonical
3382 // definition.
3383 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
13
'DC' is a 'Decl'
3384
3385 // If we've seen this before, return the canonical declaration.
3386 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3387 if (Index < Previous.size() && Previous[Index])
14
Assuming the condition is false
3388 return Previous[Index];
3389
3390 // If this is the first time, but we have parsed a declaration of the context,
3391 // build the anonymous declaration list from the parsed declaration.
3392 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
15
Calling 'ASTDeclReader::getPrimaryDCForAnonymousDecl'
3393 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3394 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3395 if (Previous.size() == Number)
3396 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3397 else
3398 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3399 });
3400 }
3401
3402 return Index < Previous.size() ? Previous[Index] : nullptr;
3403}
3404
3405void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3406 DeclContext *DC, unsigned Index,
3407 NamedDecl *D) {
3408 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3409
3410 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3411 if (Index >= Previous.size())
3412 Previous.resize(Index + 1);
3413 if (!Previous[Index])
3414 Previous[Index] = D;
3415}
3416
3417ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3418 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
5
Assuming field 'TypedefNameForLinkage' is null
6
'?' condition is false
3419 : D->getDeclName();
3420
3421 if (!Name && !needsAnonymousDeclarationNumber(D)) {
7
Assuming the condition is false
8
Taking false branch
3422 // Don't bother trying to find unnamed declarations that are in
3423 // unmergeable contexts.
3424 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3425 AnonymousDeclNumber, TypedefNameForLinkage);
3426 Result.suppress();
3427 return Result;
3428 }
3429
3430 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3431 if (TypedefNameForLinkage
8.1
Field 'TypedefNameForLinkage' is null
) {
9
Taking false branch
3432 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3433 std::make_pair(DC, TypedefNameForLinkage));
3434 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3435 if (isSameEntity(It->second, D))
3436 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3437 TypedefNameForLinkage);
3438 // Go on to check in other places in case an existing typedef name
3439 // was not imported.
3440 }
3441
3442 if (needsAnonymousDeclarationNumber(D)) {
10
Assuming the condition is true
11
Taking true branch
3443 // This is an anonymous declaration that we may need to merge. Look it up
3444 // in its context by number.
3445 if (auto *Existing = getAnonymousDeclForMerging(
12
Calling 'ASTDeclReader::getAnonymousDeclForMerging'
3446 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3447 if (isSameEntity(Existing, D))
3448 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3449 TypedefNameForLinkage);
3450 } else if (DC->isTranslationUnit() &&
3451 !Reader.getContext().getLangOpts().CPlusPlus) {
3452 IdentifierResolver &IdResolver = Reader.getIdResolver();
3453
3454 // Temporarily consider the identifier to be up-to-date. We don't want to
3455 // cause additional lookups here.
3456 class UpToDateIdentifierRAII {
3457 IdentifierInfo *II;
3458 bool WasOutToDate = false;
3459
3460 public:
3461 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3462 if (II) {
3463 WasOutToDate = II->isOutOfDate();
3464 if (WasOutToDate)
3465 II->setOutOfDate(false);
3466 }
3467 }
3468
3469 ~UpToDateIdentifierRAII() {
3470 if (WasOutToDate)
3471 II->setOutOfDate(true);
3472 }
3473 } UpToDate(Name.getAsIdentifierInfo());
3474
3475 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3476 IEnd = IdResolver.end();
3477 I != IEnd; ++I) {
3478 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3479 if (isSameEntity(Existing, D))
3480 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3481 TypedefNameForLinkage);
3482 }
3483 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3484 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3485 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3486 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3487 if (isSameEntity(Existing, D))
3488 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3489 TypedefNameForLinkage);
3490 }
3491 } else {
3492 // Not in a mergeable context.
3493 return FindExistingResult(Reader);
3494 }
3495
3496 // If this declaration is from a merged context, make a note that we need to
3497 // check that the canonical definition of that context contains the decl.
3498 //
3499 // FIXME: We should do something similar if we merge two definitions of the
3500 // same template specialization into the same CXXRecordDecl.
3501 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3502 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3503 MergedDCIt->second == D->getDeclContext())
3504 Reader.PendingOdrMergeChecks.push_back(D);
3505
3506 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3507 AnonymousDeclNumber, TypedefNameForLinkage);
3508}
3509
3510template<typename DeclT>
3511Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3512 return D->RedeclLink.getLatestNotUpdated();
3513}
3514
3515Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3516 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3516)
;
3517}
3518
3519Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3520 assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3520, __PRETTY_FUNCTION__))
;
3521
3522 switch (D->getKind()) {
3523#define ABSTRACT_DECL(TYPE)
3524#define DECL(TYPE, BASE) \
3525 case Decl::TYPE: \
3526 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3527#include "clang/AST/DeclNodes.inc"
3528 }
3529 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3529)
;
3530}
3531
3532Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3533 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3534}
3535
3536void ASTDeclReader::mergeInheritableAttributes(ASTReader &Reader, Decl *D,
3537 Decl *Previous) {
3538 InheritableAttr *NewAttr = nullptr;
3539 ASTContext &Context = Reader.getContext();
3540 const auto *IA = Previous->getAttr<MSInheritanceAttr>();
3541
3542 if (IA && !D->hasAttr<MSInheritanceAttr>()) {
3543 NewAttr = cast<InheritableAttr>(IA->clone(Context));
3544 NewAttr->setInherited(true);
3545 D->addAttr(NewAttr);
3546 }
3547}
3548
3549template<typename DeclT>
3550void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3551 Redeclarable<DeclT> *D,
3552 Decl *Previous, Decl *Canon) {
3553 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3554 D->First = cast<DeclT>(Previous)->First;
3555}
3556
3557namespace clang {
3558
3559template<>
3560void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3561 Redeclarable<VarDecl> *D,
3562 Decl *Previous, Decl *Canon) {
3563 auto *VD = static_cast<VarDecl *>(D);
3564 auto *PrevVD = cast<VarDecl>(Previous);
3565 D->RedeclLink.setPrevious(PrevVD);
3566 D->First = PrevVD->First;
3567
3568 // We should keep at most one definition on the chain.
3569 // FIXME: Cache the definition once we've found it. Building a chain with
3570 // N definitions currently takes O(N^2) time here.
3571 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3572 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3573 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3574 Reader.mergeDefinitionVisibility(CurD, VD);
3575 VD->demoteThisDefinitionToDeclaration();
3576 break;
3577 }
3578 }
3579 }
3580}
3581
3582static bool isUndeducedReturnType(QualType T) {
3583 auto *DT = T->getContainedDeducedType();
3584 return DT && !DT->isDeduced();
3585}
3586
3587template<>
3588void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3589 Redeclarable<FunctionDecl> *D,
3590 Decl *Previous, Decl *Canon) {
3591 auto *FD = static_cast<FunctionDecl *>(D);
3592 auto *PrevFD = cast<FunctionDecl>(Previous);
3593
3594 FD->RedeclLink.setPrevious(PrevFD);
3595 FD->First = PrevFD->First;
3596
3597 // If the previous declaration is an inline function declaration, then this
3598 // declaration is too.
3599 if (PrevFD->isInlined() != FD->isInlined()) {
3600 // FIXME: [dcl.fct.spec]p4:
3601 // If a function with external linkage is declared inline in one
3602 // translation unit, it shall be declared inline in all translation
3603 // units in which it appears.
3604 //
3605 // Be careful of this case:
3606 //
3607 // module A:
3608 // template<typename T> struct X { void f(); };
3609 // template<typename T> inline void X<T>::f() {}
3610 //
3611 // module B instantiates the declaration of X<int>::f
3612 // module C instantiates the definition of X<int>::f
3613 //
3614 // If module B and C are merged, we do not have a violation of this rule.
3615 FD->setImplicitlyInline(true);
3616 }
3617
3618 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3619 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3620 if (FPT && PrevFPT) {
3621 // If we need to propagate an exception specification along the redecl
3622 // chain, make a note of that so that we can do so later.
3623 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3624 bool WasUnresolved =
3625 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3626 if (IsUnresolved != WasUnresolved)
3627 Reader.PendingExceptionSpecUpdates.insert(
3628 {Canon, IsUnresolved ? PrevFD : FD});
3629
3630 // If we need to propagate a deduced return type along the redecl chain,
3631 // make a note of that so that we can do it later.
3632 bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3633 bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3634 if (IsUndeduced != WasUndeduced)
3635 Reader.PendingDeducedTypeUpdates.insert(
3636 {cast<FunctionDecl>(Canon),
3637 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3638 }
3639}
3640
3641} // namespace clang
3642
3643void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3644 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3644)
;
3645}
3646
3647/// Inherit the default template argument from \p From to \p To. Returns
3648/// \c false if there is no default template for \p From.
3649template <typename ParmDecl>
3650static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3651 Decl *ToD) {
3652 auto *To = cast<ParmDecl>(ToD);
3653 if (!From->hasDefaultArgument())
3654 return false;
3655 To->setInheritedDefaultArgument(Context, From);
3656 return true;
3657}
3658
3659static void inheritDefaultTemplateArguments(ASTContext &Context,
3660 TemplateDecl *From,
3661 TemplateDecl *To) {
3662 auto *FromTP = From->getTemplateParameters();
3663 auto *ToTP = To->getTemplateParameters();
3664 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3664, __PRETTY_FUNCTION__))
;
3665
3666 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3667 NamedDecl *FromParam = FromTP->getParam(I);
3668 NamedDecl *ToParam = ToTP->getParam(I);
3669
3670 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3671 inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3672 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3673 inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3674 else
3675 inheritDefaultTemplateArgument(
3676 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3677 }
3678}
3679
3680void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3681 Decl *Previous, Decl *Canon) {
3682 assert(D && Previous)((D && Previous) ? static_cast<void> (0) : __assert_fail
("D && Previous", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3682, __PRETTY_FUNCTION__))
;
3683
3684 switch (D->getKind()) {
3685#define ABSTRACT_DECL(TYPE)
3686#define DECL(TYPE, BASE) \
3687 case Decl::TYPE: \
3688 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3689 break;
3690#include "clang/AST/DeclNodes.inc"
3691 }
3692
3693 // If the declaration was visible in one module, a redeclaration of it in
3694 // another module remains visible even if it wouldn't be visible by itself.
3695 //
3696 // FIXME: In this case, the declaration should only be visible if a module
3697 // that makes it visible has been imported.
3698 D->IdentifierNamespace |=
3699 Previous->IdentifierNamespace &
3700 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3701
3702 // If the declaration declares a template, it may inherit default arguments
3703 // from the previous declaration.
3704 if (auto *TD = dyn_cast<TemplateDecl>(D))
3705 inheritDefaultTemplateArguments(Reader.getContext(),
3706 cast<TemplateDecl>(Previous), TD);
3707
3708 // If any of the declaration in the chain contains an Inheritable attribute,
3709 // it needs to be added to all the declarations in the redeclarable chain.
3710 // FIXME: Only the logic of merging MSInheritableAttr is present, it should
3711 // be extended for all inheritable attributes.
3712 mergeInheritableAttributes(Reader, D, Previous);
3713}
3714
3715template<typename DeclT>
3716void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3717 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3718}
3719
3720void ASTDeclReader::attachLatestDeclImpl(...) {
3721 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3721)
;
3722}
3723
3724void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3725 assert(D && Latest)((D && Latest) ? static_cast<void> (0) : __assert_fail
("D && Latest", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3725, __PRETTY_FUNCTION__))
;
3726
3727 switch (D->getKind()) {
3728#define ABSTRACT_DECL(TYPE)
3729#define DECL(TYPE, BASE) \
3730 case Decl::TYPE: \
3731 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3732 break;
3733#include "clang/AST/DeclNodes.inc"
3734 }
3735}
3736
3737template<typename DeclT>
3738void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3739 D->RedeclLink.markIncomplete();
3740}
3741
3742void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3743 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3743)
;
3744}
3745
3746void ASTReader::markIncompleteDeclChain(Decl *D) {
3747 switch (D->getKind()) {
3748#define ABSTRACT_DECL(TYPE)
3749#define DECL(TYPE, BASE) \
3750 case Decl::TYPE: \
3751 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3752 break;
3753#include "clang/AST/DeclNodes.inc"
3754 }
3755}
3756
3757/// Read the declaration at the given offset from the AST file.
3758Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3759 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3760 SourceLocation DeclLoc;
3761 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3762 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3763 // Keep track of where we are in the stream, then jump back there
3764 // after reading this declaration.
3765 SavedStreamPosition SavedPosition(DeclsCursor);
3766
3767 ReadingKindTracker ReadingKind(Read_Decl, *this);
3768
3769 // Note that we are loading a declaration record.
3770 Deserializing ADecl(this);
3771
3772 auto Fail = [](const char *what, llvm::Error &&Err) {
3773 llvm::report_fatal_error(Twine("ASTReader::readDeclRecord failed ") + what +
3774 ": " + toString(std::move(Err)));
3775 };
3776
3777 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(Loc.Offset))
3778 Fail("jumping", std::move(JumpFailed));
3779 ASTRecordReader Record(*this, *Loc.F);
3780 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3781 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3782 if (!MaybeCode)
3783 Fail("reading code", MaybeCode.takeError());
3784 unsigned Code = MaybeCode.get();
3785
3786 ASTContext &Context = getContext();
3787 Decl *D = nullptr;
3788 Expected<unsigned> MaybeDeclCode = Record.readRecord(DeclsCursor, Code);
3789 if (!MaybeDeclCode)
3790 llvm::report_fatal_error(
3791 "ASTReader::readDeclRecord failed reading decl code: " +
3792 toString(MaybeDeclCode.takeError()));
3793 switch ((DeclCode)MaybeDeclCode.get()) {
3794 case DECL_CONTEXT_LEXICAL:
3795 case DECL_CONTEXT_VISIBLE:
3796 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3796)
;
3797 case DECL_TYPEDEF:
3798 D = TypedefDecl::CreateDeserialized(Context, ID);
3799 break;
3800 case DECL_TYPEALIAS:
3801 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3802 break;
3803 case DECL_ENUM:
3804 D = EnumDecl::CreateDeserialized(Context, ID);
3805 break;
3806 case DECL_RECORD:
3807 D = RecordDecl::CreateDeserialized(Context, ID);
3808 break;
3809 case DECL_ENUM_CONSTANT:
3810 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3811 break;
3812 case DECL_FUNCTION:
3813 D = FunctionDecl::CreateDeserialized(Context, ID);
3814 break;
3815 case DECL_LINKAGE_SPEC:
3816 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3817 break;
3818 case DECL_EXPORT:
3819 D = ExportDecl::CreateDeserialized(Context, ID);
3820 break;
3821 case DECL_LABEL:
3822 D = LabelDecl::CreateDeserialized(Context, ID);
3823 break;
3824 case DECL_NAMESPACE:
3825 D = NamespaceDecl::CreateDeserialized(Context, ID);
3826 break;
3827 case DECL_NAMESPACE_ALIAS:
3828 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3829 break;
3830 case DECL_USING:
3831 D = UsingDecl::CreateDeserialized(Context, ID);
3832 break;
3833 case DECL_USING_PACK:
3834 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3835 break;
3836 case DECL_USING_SHADOW:
3837 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3838 break;
3839 case DECL_CONSTRUCTOR_USING_SHADOW:
3840 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3841 break;
3842 case DECL_USING_DIRECTIVE:
3843 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3844 break;
3845 case DECL_UNRESOLVED_USING_VALUE:
3846 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3847 break;
3848 case DECL_UNRESOLVED_USING_TYPENAME:
3849 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3850 break;
3851 case DECL_CXX_RECORD:
3852 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3853 break;
3854 case DECL_CXX_DEDUCTION_GUIDE:
3855 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3856 break;
3857 case DECL_CXX_METHOD:
3858 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3859 break;
3860 case DECL_CXX_CONSTRUCTOR:
3861 D = CXXConstructorDecl::CreateDeserialized(Context, ID, Record.readInt());
3862 break;
3863 case DECL_CXX_DESTRUCTOR:
3864 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3865 break;
3866 case DECL_CXX_CONVERSION:
3867 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3868 break;
3869 case DECL_ACCESS_SPEC:
3870 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3871 break;
3872 case DECL_FRIEND:
3873 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3874 break;
3875 case DECL_FRIEND_TEMPLATE:
3876 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3877 break;
3878 case DECL_CLASS_TEMPLATE:
3879 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3880 break;
3881 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3882 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3883 break;
3884 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3885 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3886 break;
3887 case DECL_VAR_TEMPLATE:
3888 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3889 break;
3890 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3891 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3892 break;
3893 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3894 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3895 break;
3896 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3897 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3898 break;
3899 case DECL_FUNCTION_TEMPLATE:
3900 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3901 break;
3902 case DECL_TEMPLATE_TYPE_PARM: {
3903 bool HasTypeConstraint = Record.readInt();
3904 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID,
3905 HasTypeConstraint);
3906 break;
3907 }
3908 case DECL_NON_TYPE_TEMPLATE_PARM: {
3909 bool HasTypeConstraint = Record.readInt();
3910 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3911 HasTypeConstraint);
3912 break;
3913 }
3914 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK: {
3915 bool HasTypeConstraint = Record.readInt();
3916 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3917 Record.readInt(),
3918 HasTypeConstraint);
3919 break;
3920 }
3921 case DECL_TEMPLATE_TEMPLATE_PARM:
3922 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3923 break;
3924 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3925 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3926 Record.readInt());
3927 break;
3928 case DECL_TYPE_ALIAS_TEMPLATE:
3929 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3930 break;
3931 case DECL_CONCEPT:
3932 D = ConceptDecl::CreateDeserialized(Context, ID);
3933 break;
3934 case DECL_REQUIRES_EXPR_BODY:
3935 D = RequiresExprBodyDecl::CreateDeserialized(Context, ID);
3936 break;
3937 case DECL_STATIC_ASSERT:
3938 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3939 break;
3940 case DECL_OBJC_METHOD:
3941 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3942 break;
3943 case DECL_OBJC_INTERFACE:
3944 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3945 break;
3946 case DECL_OBJC_IVAR:
3947 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3948 break;
3949 case DECL_OBJC_PROTOCOL:
3950 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3951 break;
3952 case DECL_OBJC_AT_DEFS_FIELD:
3953 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3954 break;
3955 case DECL_OBJC_CATEGORY:
3956 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3957 break;
3958 case DECL_OBJC_CATEGORY_IMPL:
3959 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3960 break;
3961 case DECL_OBJC_IMPLEMENTATION:
3962 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3963 break;
3964 case DECL_OBJC_COMPATIBLE_ALIAS:
3965 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3966 break;
3967 case DECL_OBJC_PROPERTY:
3968 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3969 break;
3970 case DECL_OBJC_PROPERTY_IMPL:
3971 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3972 break;
3973 case DECL_FIELD:
3974 D = FieldDecl::CreateDeserialized(Context, ID);
3975 break;
3976 case DECL_INDIRECTFIELD:
3977 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3978 break;
3979 case DECL_VAR:
3980 D = VarDecl::CreateDeserialized(Context, ID);
3981 break;
3982 case DECL_IMPLICIT_PARAM:
3983 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3984 break;
3985 case DECL_PARM_VAR:
3986 D = ParmVarDecl::CreateDeserialized(Context, ID);
3987 break;
3988 case DECL_DECOMPOSITION:
3989 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3990 break;
3991 case DECL_BINDING:
3992 D = BindingDecl::CreateDeserialized(Context, ID);
3993 break;
3994 case DECL_FILE_SCOPE_ASM:
3995 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3996 break;
3997 case DECL_BLOCK:
3998 D = BlockDecl::CreateDeserialized(Context, ID);
3999 break;
4000 case DECL_MS_PROPERTY:
4001 D = MSPropertyDecl::CreateDeserialized(Context, ID);
4002 break;
4003 case DECL_MS_GUID:
4004 D = MSGuidDecl::CreateDeserialized(Context, ID);
4005 break;
4006 case DECL_TEMPLATE_PARAM_OBJECT:
4007 D = TemplateParamObjectDecl::CreateDeserialized(Context, ID);
4008 break;
4009 case DECL_CAPTURED:
4010 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
4011 break;
4012 case DECL_CXX_BASE_SPECIFIERS:
4013 Error("attempt to read a C++ base-specifier record as a declaration");
4014 return nullptr;
4015 case DECL_CXX_CTOR_INITIALIZERS:
4016 Error("attempt to read a C++ ctor initializer record as a declaration");
4017 return nullptr;
4018 case DECL_IMPORT:
4019 // Note: last entry of the ImportDecl record is the number of stored source
4020 // locations.
4021 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
4022 break;
4023 case DECL_OMP_THREADPRIVATE: {
4024 Record.skipInts(1);
4025 unsigned NumChildren = Record.readInt();
4026 Record.skipInts(1);
4027 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, NumChildren);
4028 break;
4029 }
4030 case DECL_OMP_ALLOCATE: {
4031 unsigned NumClauses = Record.readInt();
4032 unsigned NumVars = Record.readInt();
4033 Record.skipInts(1);
4034 D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
4035 break;
4036 }
4037 case DECL_OMP_REQUIRES: {
4038 unsigned NumClauses = Record.readInt();
4039 Record.skipInts(2);
4040 D = OMPRequiresDecl::CreateDeserialized(Context, ID, NumClauses);
4041 break;
4042 }
4043 case DECL_OMP_DECLARE_REDUCTION:
4044 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
4045 break;
4046 case DECL_OMP_DECLARE_MAPPER: {
4047 unsigned NumClauses = Record.readInt();
4048 Record.skipInts(2);
4049 D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, NumClauses);
4050 break;
4051 }
4052 case DECL_OMP_CAPTUREDEXPR:
4053 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
4054 break;
4055 case DECL_PRAGMA_COMMENT:
4056 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
4057 break;
4058 case DECL_PRAGMA_DETECT_MISMATCH:
4059 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
4060 Record.readInt());
4061 break;
4062 case DECL_EMPTY:
4063 D = EmptyDecl::CreateDeserialized(Context, ID);
4064 break;
4065 case DECL_LIFETIME_EXTENDED_TEMPORARY:
4066 D = LifetimeExtendedTemporaryDecl::CreateDeserialized(Context, ID);
4067 break;
4068 case DECL_OBJC_TYPE_PARAM:
4069 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
4070 break;
4071 }
4072
4073 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4073, __PRETTY_FUNCTION__))
;
4074 LoadedDecl(Index, D);
4075 // Set the DeclContext before doing any deserialization, to make sure internal
4076 // calls to Decl::getASTContext() by Decl's methods will find the
4077 // TranslationUnitDecl without crashing.
4078 D->setDeclContext(Context.getTranslationUnitDecl());
4079 Reader.Visit(D);
4080
4081 // If this declaration is also a declaration context, get the
4082 // offsets for its tables of lexical and visible declarations.
4083 if (auto *DC = dyn_cast<DeclContext>(D)) {
4084 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
4085 if (Offsets.first &&
4086 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
4087 return nullptr;
4088 if (Offsets.second &&
4089 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
4090 return nullptr;
4091 }
4092 assert(Record.getIdx() == Record.size())((Record.getIdx() == Record.size()) ? static_cast<void>
(0) : __assert_fail ("Record.getIdx() == Record.size()", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4092, __PRETTY_FUNCTION__))
;
4093
4094 // Load any relevant update records.
4095 PendingUpdateRecords.push_back(
4096 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
4097
4098 // Load the categories after recursive loading is finished.
4099 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
4100 // If we already have a definition when deserializing the ObjCInterfaceDecl,
4101 // we put the Decl in PendingDefinitions so we can pull the categories here.
4102 if (Class->isThisDeclarationADefinition() ||
4103 PendingDefinitions.count(Class))
4104 loadObjCCategories(ID, Class);
4105
4106 // If we have deserialized a declaration that has a definition the
4107 // AST consumer might need to know about, queue it.
4108 // We don't pass it to the consumer immediately because we may be in recursive
4109 // loading, and some declarations may still be initializing.
4110 PotentiallyInterestingDecls.push_back(
4111 InterestingDecl(D, Reader.hasPendingBody()));
4112
4113 return D;
4114}
4115
4116void ASTReader::PassInterestingDeclsToConsumer() {
4117 assert(Consumer)((Consumer) ? static_cast<void> (0) : __assert_fail ("Consumer"
, "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4117, __PRETTY_FUNCTION__))
;
4118
4119 if (PassingDeclsToConsumer)
4120 return;
4121
4122 // Guard variable to avoid recursively redoing the process of passing
4123 // decls to consumer.
4124 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
4125 true);
4126
4127 // Ensure that we've loaded all potentially-interesting declarations
4128 // that need to be eagerly loaded.
4129 for (auto ID : EagerlyDeserializedDecls)
4130 GetDecl(ID);
4131 EagerlyDeserializedDecls.clear();
4132
4133 while (!PotentiallyInterestingDecls.empty()) {
4134 InterestingDecl D = PotentiallyInterestingDecls.front();
4135 PotentiallyInterestingDecls.pop_front();
4136 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
4137 PassInterestingDeclToConsumer(D.getDecl());
4138 }
4139}
4140
4141void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4142 // The declaration may have been modified by files later in the chain.
4143 // If this is the case, read the record containing the updates from each file
4144 // and pass it to ASTDeclReader to make the modifications.
4145 serialization::GlobalDeclID ID = Record.ID;
4146 Decl *D = Record.D;
4147 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4148 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
4149
4150 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
4151
4152 if (UpdI != DeclUpdateOffsets.end()) {
4153 auto UpdateOffsets = std::move(UpdI->second);
4154 DeclUpdateOffsets.erase(UpdI);
4155
4156 // Check if this decl was interesting to the consumer. If we just loaded
4157 // the declaration, then we know it was interesting and we skip the call
4158 // to isConsumerInterestedIn because it is unsafe to call in the
4159 // current ASTReader state.
4160 bool WasInteresting =
4161 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
4162 for (auto &FileAndOffset : UpdateOffsets) {
4163 ModuleFile *F = FileAndOffset.first;
4164 uint64_t Offset = FileAndOffset.second;
4165 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4166 SavedStreamPosition SavedPosition(Cursor);
4167 if (llvm::Error JumpFailed = Cursor.JumpToBit(Offset))
4168 // FIXME don't do a fatal error.
4169 llvm::report_fatal_error(
4170 "ASTReader::loadDeclUpdateRecords failed jumping: " +
4171 toString(std::move(JumpFailed)));
4172 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4173 if (!MaybeCode)
4174 llvm::report_fatal_error(
4175 "ASTReader::loadDeclUpdateRecords failed reading code: " +
4176 toString(MaybeCode.takeError()));
4177 unsigned Code = MaybeCode.get();
4178 ASTRecordReader Record(*this, *F);
4179 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, Code))
4180 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4181, __PRETTY_FUNCTION__))
4181 "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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4181, __PRETTY_FUNCTION__))
;
4182 else
4183 llvm::report_fatal_error(
4184 "ASTReader::loadDeclUpdateRecords failed reading rec code: " +
4185 toString(MaybeCode.takeError()));
4186
4187 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4188 SourceLocation());
4189 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4190
4191 // We might have made this declaration interesting. If so, remember that
4192 // we need to hand it off to the consumer.
4193 if (!WasInteresting &&
4194 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4195 PotentiallyInterestingDecls.push_back(
4196 InterestingDecl(D, Reader.hasPendingBody()));
4197 WasInteresting = true;
4198 }
4199 }
4200 }
4201 // Add the lazy specializations to the template.
4202 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4204, __PRETTY_FUNCTION__))
4203 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4204, __PRETTY_FUNCTION__))
4204 "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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4204, __PRETTY_FUNCTION__))
;
4205 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4206 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4207 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4208 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4209 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4210 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4211 PendingLazySpecializationIDs.clear();
4212
4213 // Load the pending visible updates for this decl context, if it has any.
4214 auto I = PendingVisibleUpdates.find(ID);
4215 if (I != PendingVisibleUpdates.end()) {
4216 auto VisibleUpdates = std::move(I->second);
4217 PendingVisibleUpdates.erase(I);
4218
4219 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4220 for (const auto &Update : VisibleUpdates)
4221 Lookups[DC].Table.add(
4222 Update.Mod, Update.Data,
4223 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4224 DC->setHasExternalVisibleStorage(true);
4225 }
4226}
4227
4228void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4229 // Attach FirstLocal to the end of the decl chain.
4230 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4231 if (FirstLocal != CanonDecl) {
4232 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4233 ASTDeclReader::attachPreviousDecl(
4234 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4235 CanonDecl);
4236 }
4237
4238 if (!LocalOffset) {
4239 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4240 return;
4241 }
4242
4243 // Load the list of other redeclarations from this module file.
4244 ModuleFile *M = getOwningModuleFile(FirstLocal);
4245 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4245, __PRETTY_FUNCTION__))
;
4246
4247 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4248 SavedStreamPosition SavedPosition(Cursor);
4249 if (llvm::Error JumpFailed = Cursor.JumpToBit(LocalOffset))
4250 llvm::report_fatal_error(
4251 "ASTReader::loadPendingDeclChain failed jumping: " +
4252 toString(std::move(JumpFailed)));
4253
4254 RecordData Record;
4255 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4256 if (!MaybeCode)
4257 llvm::report_fatal_error(
4258 "ASTReader::loadPendingDeclChain failed reading code: " +
4259 toString(MaybeCode.takeError()));
4260 unsigned Code = MaybeCode.get();
4261 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record))
4262 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4263, __PRETTY_FUNCTION__))
4263 "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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4263, __PRETTY_FUNCTION__))
;
4264 else
4265 llvm::report_fatal_error(
4266 "ASTReader::loadPendingDeclChain failed reading rec code: " +
4267 toString(MaybeCode.takeError()));
4268
4269 // FIXME: We have several different dispatches on decl kind here; maybe
4270 // we should instead generate one loop per kind and dispatch up-front?
4271 Decl *MostRecent = FirstLocal;
4272 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4273 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4274 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4275 MostRecent = D;
4276 }
4277 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4278}
4279
4280namespace {
4281
4282 /// Given an ObjC interface, goes through the modules and links to the
4283 /// interface all the categories for it.
4284 class ObjCCategoriesVisitor {
4285 ASTReader &Reader;
4286 ObjCInterfaceDecl *Interface;
4287 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4288 ObjCCategoryDecl *Tail = nullptr;
4289 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4290 serialization::GlobalDeclID InterfaceID;
4291 unsigned PreviousGeneration;
4292
4293 void add(ObjCCategoryDecl *Cat) {
4294 // Only process each category once.
4295 if (!Deserialized.erase(Cat))
4296 return;
4297
4298 // Check for duplicate categories.
4299 if (Cat->getDeclName()) {
4300 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4301 if (Existing &&
4302 Reader.getOwningModuleFile(Existing)
4303 != Reader.getOwningModuleFile(Cat)) {
4304 // FIXME: We should not warn for duplicates in diamond:
4305 //
4306 // MT //
4307 // / \ //
4308 // ML MR //
4309 // \ / //
4310 // MB //
4311 //
4312 // If there are duplicates in ML/MR, there will be warning when
4313 // creating MB *and* when importing MB. We should not warn when
4314 // importing.
4315 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4316 << Interface->getDeclName() << Cat->getDeclName();
4317 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4318 } else if (!Existing) {
4319 // Record this category.
4320 Existing = Cat;
4321 }
4322 }
4323
4324 // Add this category to the end of the chain.
4325 if (Tail)
4326 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4327 else
4328 Interface->setCategoryListRaw(Cat);
4329 Tail = Cat;
4330 }
4331
4332 public:
4333 ObjCCategoriesVisitor(ASTReader &Reader,
4334 ObjCInterfaceDecl *Interface,
4335 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4336 serialization::GlobalDeclID InterfaceID,
4337 unsigned PreviousGeneration)
4338 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4339 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4340 // Populate the name -> category map with the set of known categories.
4341 for (auto *Cat : Interface->known_categories()) {
4342 if (Cat->getDeclName())
4343 NameCategoryMap[Cat->getDeclName()] = Cat;
4344
4345 // Keep track of the tail of the category list.
4346 Tail = Cat;
4347 }
4348 }
4349
4350 bool operator()(ModuleFile &M) {
4351 // If we've loaded all of the category information we care about from
4352 // this module file, we're done.
4353 if (M.Generation <= PreviousGeneration)
4354 return true;
4355
4356 // Map global ID of the definition down to the local ID used in this
4357 // module file. If there is no such mapping, we'll find nothing here
4358 // (or in any module it imports).
4359 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4360 if (!LocalID)
4361 return true;
4362
4363 // Perform a binary search to find the local redeclarations for this
4364 // declaration (if any).
4365 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4366 const ObjCCategoriesInfo *Result
4367 = std::lower_bound(M.ObjCCategoriesMap,
4368 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4369 Compare);
4370 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4371 Result->DefinitionID != LocalID) {
4372 // We didn't find anything. If the class definition is in this module
4373 // file, then the module files it depends on cannot have any categories,
4374 // so suppress further lookup.
4375 return Reader.isDeclIDFromModule(InterfaceID, M);
4376 }
4377
4378 // We found something. Dig out all of the categories.
4379 unsigned Offset = Result->Offset;
4380 unsigned N = M.ObjCCategories[Offset];
4381 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4382 for (unsigned I = 0; I != N; ++I)
4383 add(cast_or_null<ObjCCategoryDecl>(
4384 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4385 return true;
4386 }
4387 };
4388
4389} // namespace
4390
4391void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4392 ObjCInterfaceDecl *D,
4393 unsigned PreviousGeneration) {
4394 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4395 PreviousGeneration);
4396 ModuleMgr.visit(Visitor);
4397}
4398
4399template<typename DeclT, typename Fn>
4400static void forAllLaterRedecls(DeclT *D, Fn F) {
4401 F(D);
4402
4403 // Check whether we've already merged D into its redeclaration chain.
4404 // MostRecent may or may not be nullptr if D has not been merged. If
4405 // not, walk the merged redecl chain and see if it's there.
4406 auto *MostRecent = D->getMostRecentDecl();
4407 bool Found = false;
4408 for (auto *Redecl = MostRecent; Redecl && !Found;
4409 Redecl = Redecl->getPreviousDecl())
4410 Found = (Redecl == D);
4411
4412 // If this declaration is merged, apply the functor to all later decls.
4413 if (Found) {
4414 for (auto *Redecl = MostRecent; Redecl != D;
4415 Redecl = Redecl->getPreviousDecl())
4416 F(Redecl);
4417 }
4418}
4419
4420void ASTDeclReader::UpdateDecl(Decl *D,
4421 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4422 while (Record.getIdx() < Record.size()) {
4423 switch ((DeclUpdateKind)Record.readInt()) {
4424 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4425 auto *RD = cast<CXXRecordDecl>(D);
4426 // FIXME: If we also have an update record for instantiating the
4427 // definition of D, we need that to happen before we get here.
4428 Decl *MD = Record.readDecl();
4429 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4429, __PRETTY_FUNCTION__))
;
4430 // FIXME: We should call addHiddenDecl instead, to add the member
4431 // to its DeclContext.
4432 RD->addedMember(MD);
4433 break;
4434 }
4435
4436 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4437 // It will be added to the template's lazy specialization set.
4438 PendingLazySpecializationIDs.push_back(readDeclID());
4439 break;
4440
4441 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4442 auto *Anon = readDeclAs<NamespaceDecl>();
4443
4444 // Each module has its own anonymous namespace, which is disjoint from
4445 // any other module's anonymous namespaces, so don't attach the anonymous
4446 // namespace at all.
4447 if (!Record.isModule()) {
4448 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4449 TU->setAnonymousNamespace(Anon);
4450 else
4451 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4452 }
4453 break;
4454 }
4455
4456 case UPD_CXX_ADDED_VAR_DEFINITION: {
4457 auto *VD = cast<VarDecl>(D);
4458 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4459 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4460 uint64_t Val = Record.readInt();
4461 if (Val && !VD->getInit()) {
4462 VD->setInit(Record.readExpr());
4463 if (Val != 1) {
4464 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4465 Eval->HasConstantInitialization = (Val & 2) != 0;
4466 Eval->HasConstantDestruction = (Val & 4) != 0;
4467 }
4468 }
4469 break;
4470 }
4471
4472 case UPD_CXX_POINT_OF_INSTANTIATION: {
4473 SourceLocation POI = Record.readSourceLocation();
4474 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4475 VTSD->setPointOfInstantiation(POI);
4476 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4477 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4478 } else {
4479 auto *FD = cast<FunctionDecl>(D);
4480 if (auto *FTSInfo = FD->TemplateOrSpecialization
4481 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4482 FTSInfo->setPointOfInstantiation(POI);
4483 else
4484 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4485 ->setPointOfInstantiation(POI);
4486 }
4487 break;
4488 }
4489
4490 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4491 auto *Param = cast<ParmVarDecl>(D);
4492
4493 // We have to read the default argument regardless of whether we use it
4494 // so that hypothetical further update records aren't messed up.
4495 // TODO: Add a function to skip over the next expr record.
4496 auto *DefaultArg = Record.readExpr();
4497
4498 // Only apply the update if the parameter still has an uninstantiated
4499 // default argument.
4500 if (Param->hasUninstantiatedDefaultArg())
4501 Param->setDefaultArg(DefaultArg);
4502 break;
4503 }
4504
4505 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4506 auto *FD = cast<FieldDecl>(D);
4507 auto *DefaultInit = Record.readExpr();
4508
4509 // Only apply the update if the field still has an uninstantiated
4510 // default member initializer.
4511 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4512 if (DefaultInit)
4513 FD->setInClassInitializer(DefaultInit);
4514 else
4515 // Instantiation failed. We can get here if we serialized an AST for
4516 // an invalid program.
4517 FD->removeInClassInitializer();
4518 }
4519 break;
4520 }
4521
4522 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4523 auto *FD = cast<FunctionDecl>(D);
4524 if (Reader.PendingBodies[FD]) {
4525 // FIXME: Maybe check for ODR violations.
4526 // It's safe to stop now because this update record is always last.
4527 return;
4528 }
4529
4530 if (Record.readInt()) {
4531 // Maintain AST consistency: any later redeclarations of this function
4532 // are inline if this one is. (We might have merged another declaration
4533 // into this one.)
4534 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4535 FD->setImplicitlyInline();
4536 });
4537 }
4538 FD->setInnerLocStart(readSourceLocation());
4539 ReadFunctionDefinition(FD);
4540 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~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4540, __PRETTY_FUNCTION__))
;
4541 break;
4542 }
4543
4544 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4545 auto *RD = cast<CXXRecordDecl>(D);
4546 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4547 bool HadRealDefinition =
4548 OldDD && (OldDD->Definition != RD ||
4549 !Reader.PendingFakeDefinitionData.count(OldDD));
4550 RD->setParamDestroyedInCallee(Record.readInt());
4551 RD->setArgPassingRestrictions(
4552 (RecordDecl::ArgPassingKind)Record.readInt());
4553 ReadCXXRecordDefinition(RD, /*Update*/true);
4554
4555 // Visible update is handled separately.
4556 uint64_t LexicalOffset = ReadLocalOffset();
4557 if (!HadRealDefinition && LexicalOffset) {
4558 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4559 Reader.PendingFakeDefinitionData.erase(OldDD);
4560 }
4561
4562 auto TSK = (TemplateSpecializationKind)Record.readInt();
4563 SourceLocation POI = readSourceLocation();
4564 if (MemberSpecializationInfo *MSInfo =
4565 RD->getMemberSpecializationInfo()) {
4566 MSInfo->setTemplateSpecializationKind(TSK);
4567 MSInfo->setPointOfInstantiation(POI);
4568 } else {
4569 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4570 Spec->setTemplateSpecializationKind(TSK);
4571 Spec->setPointOfInstantiation(POI);
4572
4573 if (Record.readInt()) {
4574 auto *PartialSpec =
4575 readDeclAs<ClassTemplatePartialSpecializationDecl>();
4576 SmallVector<TemplateArgument, 8> TemplArgs;
4577 Record.readTemplateArgumentList(TemplArgs);
4578 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4579 Reader.getContext(), TemplArgs);
4580
4581 // FIXME: If we already have a partial specialization set,
4582 // check that it matches.
4583 if (!Spec->getSpecializedTemplateOrPartial()
4584 .is<ClassTemplatePartialSpecializationDecl *>())
4585 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4586 }
4587 }
4588
4589 RD->setTagKind((TagTypeKind)Record.readInt());
4590 RD->setLocation(readSourceLocation());
4591 RD->setLocStart(readSourceLocation());
4592 RD->setBraceRange(readSourceRange());
4593
4594 if (Record.readInt()) {
4595 AttrVec Attrs;
4596 Record.readAttributes(Attrs);
4597 // If the declaration already has attributes, we assume that some other
4598 // AST file already loaded them.
4599 if (!D->hasAttrs())
4600 D->setAttrsImpl(Attrs, Reader.getContext());
4601 }
4602 break;
4603 }
4604
4605 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4606 // Set the 'operator delete' directly to avoid emitting another update
4607 // record.
4608 auto *Del = readDeclAs<FunctionDecl>();
4609 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4610 auto *ThisArg = Record.readExpr();
4611 // FIXME: Check consistency if we have an old and new operator delete.
4612 if (!First->OperatorDelete) {
4613 First->OperatorDelete = Del;
4614 First->OperatorDeleteThisArg = ThisArg;
4615 }
4616 break;
4617 }
4618
4619 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4620 SmallVector<QualType, 8> ExceptionStorage;
4621 auto ESI = Record.readExceptionSpecInfo(ExceptionStorage);
4622
4623 // Update this declaration's exception specification, if needed.
4624 auto *FD = cast<FunctionDecl>(D);
4625 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4626 // FIXME: If the exception specification is already present, check that it
4627 // matches.
4628 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4629 FD->setType(Reader.getContext().getFunctionType(
4630 FPT->getReturnType(), FPT->getParamTypes(),
4631 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4632
4633 // When we get to the end of deserializing, see if there are other decls
4634 // that we need to propagate this exception specification onto.
4635 Reader.PendingExceptionSpecUpdates.insert(
4636 std::make_pair(FD->getCanonicalDecl(), FD));
4637 }
4638 break;
4639 }
4640
4641 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4642 auto *FD = cast<FunctionDecl>(D);
4643 QualType DeducedResultType = Record.readType();
4644 Reader.PendingDeducedTypeUpdates.insert(
4645 {FD->getCanonicalDecl(), DeducedResultType});
4646 break;
4647 }
4648
4649 case UPD_DECL_MARKED_USED:
4650 // Maintain AST consistency: any later redeclarations are used too.
4651 D->markUsed(Reader.getContext());
4652 break;
4653
4654 case UPD_MANGLING_NUMBER:
4655 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4656 Record.readInt());
4657 break;
4658
4659 case UPD_STATIC_LOCAL_NUMBER:
4660 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4661 Record.readInt());
4662 break;
4663
4664 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4665 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
4666 Reader.getContext(), readSourceRange(),
4667 AttributeCommonInfo::AS_Pragma));
4668 break;
4669
4670 case UPD_DECL_MARKED_OPENMP_ALLOCATE: {
4671 auto AllocatorKind =
4672 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4673 Expr *Allocator = Record.readExpr();
4674 SourceRange SR = readSourceRange();
4675 D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4676 Reader.getContext(), AllocatorKind, Allocator, SR,
4677 AttributeCommonInfo::AS_Pragma));
4678 break;
4679 }
4680
4681 case UPD_DECL_EXPORTED: {
4682 unsigned SubmoduleID = readSubmoduleID();
4683 auto *Exported = cast<NamedDecl>(D);
4684 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4685 Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4686 Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4687 break;
4688 }
4689
4690 case UPD_DECL_MARKED_OPENMP_DECLARETARGET: {
4691 auto MapType = Record.readEnum<OMPDeclareTargetDeclAttr::MapTypeTy>();
4692 auto DevType = Record.readEnum<OMPDeclareTargetDeclAttr::DevTypeTy>();
4693 unsigned Level = Record.readInt();
4694 D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4695 Reader.getContext(), MapType, DevType, Level, readSourceRange(),
4696 AttributeCommonInfo::AS_Pragma));
4697 break;
4698 }
4699
4700 case UPD_ADDED_ATTR_TO_RECORD:
4701 AttrVec Attrs;
4702 Record.readAttributes(Attrs);
4703 assert(Attrs.size() == 1)((Attrs.size() == 1) ? static_cast<void> (0) : __assert_fail
("Attrs.size() == 1", "/build/llvm-toolchain-snapshot-12~++20201129111111+e987fbdd85d/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4703, __PRETTY_FUNCTION__))
;
4704 D->addAttr(Attrs[0]);
4705 break;
4706 }
4707 }
4708}