Bug Summary

File:clang/lib/Serialization/ASTReaderDecl.cpp
Warning:line 2468, column 16
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -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 -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-12/lib/clang/12.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/include -I /build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/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~++20200806111125+5446ec85070/build-llvm/tools/clang/lib/Serialization -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070=. -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-2020-08-06-171148-17323-1 -x c++ /build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/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~++20200806111125+5446ec85070/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 template <typename DeclT>
285 static void attachPreviousDeclImpl(ASTReader &Reader,
286 Redeclarable<DeclT> *D, Decl *Previous,
287 Decl *Canon);
288 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
289 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
290 Decl *Canon);
291
292 template <typename DeclT>
293 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
294 static void attachLatestDeclImpl(...);
295 static void attachLatestDecl(Decl *D, Decl *latest);
296
297 template <typename DeclT>
298 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
299 static void markIncompleteDeclChainImpl(...);
300
301 /// Determine whether this declaration has a pending body.
302 bool hasPendingBody() const { return HasPendingBody; }
303
304 void ReadFunctionDefinition(FunctionDecl *FD);
305 void Visit(Decl *D);
306
307 void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
308
309 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
310 ObjCCategoryDecl *Next) {
311 Cat->NextClassCategory = Next;
312 }
313
314 void VisitDecl(Decl *D);
315 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
316 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
317 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
318 void VisitNamedDecl(NamedDecl *ND);
319 void VisitLabelDecl(LabelDecl *LD);
320 void VisitNamespaceDecl(NamespaceDecl *D);
321 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
322 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
323 void VisitTypeDecl(TypeDecl *TD);
324 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
325 void VisitTypedefDecl(TypedefDecl *TD);
326 void VisitTypeAliasDecl(TypeAliasDecl *TD);
327 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
328 RedeclarableResult VisitTagDecl(TagDecl *TD);
329 void VisitEnumDecl(EnumDecl *ED);
330 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
331 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
332 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
333 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
334 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
335 ClassTemplateSpecializationDecl *D);
336
337 void VisitClassTemplateSpecializationDecl(
338 ClassTemplateSpecializationDecl *D) {
339 VisitClassTemplateSpecializationDeclImpl(D);
340 }
341
342 void VisitClassTemplatePartialSpecializationDecl(
343 ClassTemplatePartialSpecializationDecl *D);
344 void VisitClassScopeFunctionSpecializationDecl(
345 ClassScopeFunctionSpecializationDecl *D);
346 RedeclarableResult
347 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
348
349 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
350 VisitVarTemplateSpecializationDeclImpl(D);
351 }
352
353 void VisitVarTemplatePartialSpecializationDecl(
354 VarTemplatePartialSpecializationDecl *D);
355 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
356 void VisitValueDecl(ValueDecl *VD);
357 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
358 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
359 void VisitDeclaratorDecl(DeclaratorDecl *DD);
360 void VisitFunctionDecl(FunctionDecl *FD);
361 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
362 void VisitCXXMethodDecl(CXXMethodDecl *D);
363 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
364 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
365 void VisitCXXConversionDecl(CXXConversionDecl *D);
366 void VisitFieldDecl(FieldDecl *FD);
367 void VisitMSPropertyDecl(MSPropertyDecl *FD);
368 void VisitMSGuidDecl(MSGuidDecl *D);
369 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
370 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
371 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
372 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
373 void VisitParmVarDecl(ParmVarDecl *PD);
374 void VisitDecompositionDecl(DecompositionDecl *DD);
375 void VisitBindingDecl(BindingDecl *BD);
376 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
377 DeclID VisitTemplateDecl(TemplateDecl *D);
378 void VisitConceptDecl(ConceptDecl *D);
379 void VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D);
380 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
381 void VisitClassTemplateDecl(ClassTemplateDecl *D);
382 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
383 void VisitVarTemplateDecl(VarTemplateDecl *D);
384 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
385 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
386 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
387 void VisitUsingDecl(UsingDecl *D);
388 void VisitUsingPackDecl(UsingPackDecl *D);
389 void VisitUsingShadowDecl(UsingShadowDecl *D);
390 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
391 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
392 void VisitExportDecl(ExportDecl *D);
393 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
394 void VisitImportDecl(ImportDecl *D);
395 void VisitAccessSpecDecl(AccessSpecDecl *D);
396 void VisitFriendDecl(FriendDecl *D);
397 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
398 void VisitStaticAssertDecl(StaticAssertDecl *D);
399 void VisitBlockDecl(BlockDecl *BD);
400 void VisitCapturedDecl(CapturedDecl *CD);
401 void VisitEmptyDecl(EmptyDecl *D);
402 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
403
404 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
405
406 template<typename T>
407 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
408
409 template<typename T>
410 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
411 DeclID TemplatePatternID = 0);
412
413 template<typename T>
414 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
415 RedeclarableResult &Redecl,
416 DeclID TemplatePatternID = 0);
417
418 template<typename T>
419 void mergeMergeable(Mergeable<T> *D);
420
421 void mergeMergeable(LifetimeExtendedTemporaryDecl *D);
422
423 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
424 RedeclarableTemplateDecl *Existing,
425 DeclID DsID, bool IsKeyDecl);
426
427 ObjCTypeParamList *ReadObjCTypeParamList();
428
429 // FIXME: Reorder according to DeclNodes.td?
430 void VisitObjCMethodDecl(ObjCMethodDecl *D);
431 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
432 void VisitObjCContainerDecl(ObjCContainerDecl *D);
433 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
434 void VisitObjCIvarDecl(ObjCIvarDecl *D);
435 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
436 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
437 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
438 void VisitObjCImplDecl(ObjCImplDecl *D);
439 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
440 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
441 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
442 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
443 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
444 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
445 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
446 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
447 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
448 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
449 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
450 };
451
452} // namespace clang
453
454namespace {
455
456/// Iterator over the redeclarations of a declaration that have already
457/// been merged into the same redeclaration chain.
458template<typename DeclT>
459class MergedRedeclIterator {
460 DeclT *Start;
461 DeclT *Canonical = nullptr;
462 DeclT *Current = nullptr;
463
464public:
465 MergedRedeclIterator() = default;
466 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
467
468 DeclT *operator*() { return Current; }
469
470 MergedRedeclIterator &operator++() {
471 if (Current->isFirstDecl()) {
472 Canonical = Current;
473 Current = Current->getMostRecentDecl();
474 } else
475 Current = Current->getPreviousDecl();
476
477 // If we started in the merged portion, we'll reach our start position
478 // eventually. Otherwise, we'll never reach it, but the second declaration
479 // we reached was the canonical declaration, so stop when we see that one
480 // again.
481 if (Current == Start || Current == Canonical)
482 Current = nullptr;
483 return *this;
484 }
485
486 friend bool operator!=(const MergedRedeclIterator &A,
487 const MergedRedeclIterator &B) {
488 return A.Current != B.Current;
489 }
490};
491
492} // namespace
493
494template <typename DeclT>
495static llvm::iterator_range<MergedRedeclIterator<DeclT>>
496merged_redecls(DeclT *D) {
497 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
498 MergedRedeclIterator<DeclT>());
499}
500
501uint64_t ASTDeclReader::GetCurrentCursorOffset() {
502 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
503}
504
505void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
506 if (Record.readInt()) {
507 Reader.DefinitionSource[FD] =
508 Loc.F->Kind == ModuleKind::MK_MainFile ||
509 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
510 }
511 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
512 CD->setNumCtorInitializers(Record.readInt());
513 if (CD->getNumCtorInitializers())
514 CD->CtorInitializers = ReadGlobalOffset();
515 }
516 // Store the offset of the body so we can lazily load it later.
517 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
518 HasPendingBody = true;
519}
520
521void ASTDeclReader::Visit(Decl *D) {
522 DeclVisitor<ASTDeclReader, void>::Visit(D);
523
524 // At this point we have deserialized and merged the decl and it is safe to
525 // update its canonical decl to signal that the entire entity is used.
526 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
527 IsDeclMarkedUsed = false;
528
529 if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
530 if (auto *TInfo = DD->getTypeSourceInfo())
531 Record.readTypeLoc(TInfo->getTypeLoc());
532 }
533
534 if (auto *TD = dyn_cast<TypeDecl>(D)) {
535 // We have a fully initialized TypeDecl. Read its type now.
536 TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
537
538 // If this is a tag declaration with a typedef name for linkage, it's safe
539 // to load that typedef now.
540 if (NamedDeclForTagDecl)
541 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
542 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
543 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
544 // if we have a fully initialized TypeDecl, we can safely read its type now.
545 ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
546 } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
547 // FunctionDecl's body was written last after all other Stmts/Exprs.
548 // We only read it if FD doesn't already have a body (e.g., from another
549 // module).
550 // FIXME: Can we diagnose ODR violations somehow?
551 if (Record.readInt())
552 ReadFunctionDefinition(FD);
553 }
554}
555
556void ASTDeclReader::VisitDecl(Decl *D) {
557 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
558 isa<ParmVarDecl>(D) || isa<ObjCTypeParamDecl>(D)) {
559 // We don't want to deserialize the DeclContext of a template
560 // parameter or of a parameter of a function template immediately. These
561 // entities might be used in the formulation of its DeclContext (for
562 // example, a function parameter can be used in decltype() in trailing
563 // return type of the function). Use the translation unit DeclContext as a
564 // placeholder.
565 GlobalDeclID SemaDCIDForTemplateParmDecl = readDeclID();
566 GlobalDeclID LexicalDCIDForTemplateParmDecl = readDeclID();
567 if (!LexicalDCIDForTemplateParmDecl)
568 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
569 Reader.addPendingDeclContextInfo(D,
570 SemaDCIDForTemplateParmDecl,
571 LexicalDCIDForTemplateParmDecl);
572 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
573 } else {
574 auto *SemaDC = readDeclAs<DeclContext>();
575 auto *LexicalDC = readDeclAs<DeclContext>();
576 if (!LexicalDC)
577 LexicalDC = SemaDC;
578 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
579 // Avoid calling setLexicalDeclContext() directly because it uses
580 // Decl::getASTContext() internally which is unsafe during derialization.
581 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
582 Reader.getContext());
583 }
584 D->setLocation(ThisDeclLoc);
585 D->setInvalidDecl(Record.readInt());
586 if (Record.readInt()) { // hasAttrs
587 AttrVec Attrs;
588 Record.readAttributes(Attrs);
589 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
590 // internally which is unsafe during derialization.
591 D->setAttrsImpl(Attrs, Reader.getContext());
592 }
593 D->setImplicit(Record.readInt());
594 D->Used = Record.readInt();
595 IsDeclMarkedUsed |= D->Used;
596 D->setReferenced(Record.readInt());
597 D->setTopLevelDeclInObjCContainer(Record.readInt());
598 D->setAccess((AccessSpecifier)Record.readInt());
599 D->FromASTFile = true;
600 bool ModulePrivate = Record.readInt();
601
602 // Determine whether this declaration is part of a (sub)module. If so, it
603 // may not yet be visible.
604 if (unsigned SubmoduleID = readSubmoduleID()) {
605 // Store the owning submodule ID in the declaration.
606 D->setModuleOwnershipKind(
607 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
608 : Decl::ModuleOwnershipKind::VisibleWhenImported);
609 D->setOwningModuleID(SubmoduleID);
610
611 if (ModulePrivate) {
612 // Module-private declarations are never visible, so there is no work to
613 // do.
614 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
615 // If local visibility is being tracked, this declaration will become
616 // hidden and visible as the owning module does.
617 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
618 // Mark the declaration as visible when its owning module becomes visible.
619 if (Owner->NameVisibility == Module::AllVisible)
620 D->setVisibleDespiteOwningModule();
621 else
622 Reader.HiddenNamesMap[Owner].push_back(D);
623 }
624 } else if (ModulePrivate) {
625 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
626 }
627}
628
629void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
630 VisitDecl(D);
631 D->setLocation(readSourceLocation());
632 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
633 std::string Arg = readString();
634 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
635 D->getTrailingObjects<char>()[Arg.size()] = '\0';
636}
637
638void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
639 VisitDecl(D);
640 D->setLocation(readSourceLocation());
641 std::string Name = readString();
642 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
643 D->getTrailingObjects<char>()[Name.size()] = '\0';
644
645 D->ValueStart = Name.size() + 1;
646 std::string Value = readString();
647 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
648 Value.size());
649 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
650}
651
652void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
653 llvm_unreachable("Translation units are not serialized")::llvm::llvm_unreachable_internal("Translation units are not serialized"
, "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 653)
;
654}
655
656void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
657 VisitDecl(ND);
658 ND->setDeclName(Record.readDeclarationName());
659 AnonymousDeclNumber = Record.readInt();
660}
661
662void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
663 VisitNamedDecl(TD);
664 TD->setLocStart(readSourceLocation());
665 // Delay type reading until after we have fully initialized the decl.
666 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
667}
668
669ASTDeclReader::RedeclarableResult
670ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
671 RedeclarableResult Redecl = VisitRedeclarable(TD);
672 VisitTypeDecl(TD);
673 TypeSourceInfo *TInfo = readTypeSourceInfo();
674 if (Record.readInt()) { // isModed
675 QualType modedT = Record.readType();
676 TD->setModedTypeSourceInfo(TInfo, modedT);
677 } else
678 TD->setTypeSourceInfo(TInfo);
679 // Read and discard the declaration for which this is a typedef name for
680 // linkage, if it exists. We cannot rely on our type to pull in this decl,
681 // because it might have been merged with a type from another module and
682 // thus might not refer to our version of the declaration.
683 readDecl();
684 return Redecl;
685}
686
687void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
688 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
689 mergeRedeclarable(TD, Redecl);
690}
691
692void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
693 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
694 if (auto *Template = readDeclAs<TypeAliasTemplateDecl>())
695 // Merged when we merge the template.
696 TD->setDescribedAliasTemplate(Template);
697 else
698 mergeRedeclarable(TD, Redecl);
699}
700
701ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
702 RedeclarableResult Redecl = VisitRedeclarable(TD);
703 VisitTypeDecl(TD);
704
705 TD->IdentifierNamespace = Record.readInt();
706 TD->setTagKind((TagDecl::TagKind)Record.readInt());
707 if (!isa<CXXRecordDecl>(TD))
708 TD->setCompleteDefinition(Record.readInt());
709 TD->setEmbeddedInDeclarator(Record.readInt());
710 TD->setFreeStanding(Record.readInt());
711 TD->setCompleteDefinitionRequired(Record.readInt());
712 TD->setBraceRange(readSourceRange());
713
714 switch (Record.readInt()) {
715 case 0:
716 break;
717 case 1: { // ExtInfo
718 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
719 Record.readQualifierInfo(*Info);
720 TD->TypedefNameDeclOrQualifier = Info;
721 break;
722 }
723 case 2: // TypedefNameForAnonDecl
724 NamedDeclForTagDecl = readDeclID();
725 TypedefNameForLinkage = Record.readIdentifier();
726 break;
727 default:
728 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 728)
;
729 }
730
731 if (!isa<CXXRecordDecl>(TD))
732 mergeRedeclarable(TD, Redecl);
733 return Redecl;
734}
735
736void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
737 VisitTagDecl(ED);
738 if (TypeSourceInfo *TI = readTypeSourceInfo())
739 ED->setIntegerTypeSourceInfo(TI);
740 else
741 ED->setIntegerType(Record.readType());
742 ED->setPromotionType(Record.readType());
743 ED->setNumPositiveBits(Record.readInt());
744 ED->setNumNegativeBits(Record.readInt());
745 ED->setScoped(Record.readInt());
746 ED->setScopedUsingClassTag(Record.readInt());
747 ED->setFixed(Record.readInt());
748
749 ED->setHasODRHash(true);
750 ED->ODRHash = Record.readInt();
751
752 // If this is a definition subject to the ODR, and we already have a
753 // definition, merge this one into it.
754 if (ED->isCompleteDefinition() &&
755 Reader.getContext().getLangOpts().Modules &&
756 Reader.getContext().getLangOpts().CPlusPlus) {
757 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
758 if (!OldDef) {
759 // This is the first time we've seen an imported definition. Look for a
760 // local definition before deciding that we are the first definition.
761 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
762 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
763 OldDef = D;
764 break;
765 }
766 }
767 }
768 if (OldDef) {
769 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
770 ED->setCompleteDefinition(false);
771 Reader.mergeDefinitionVisibility(OldDef, ED);
772 if (OldDef->getODRHash() != ED->getODRHash())
773 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
774 } else {
775 OldDef = ED;
776 }
777 }
778
779 if (auto *InstED = readDeclAs<EnumDecl>()) {
780 auto TSK = (TemplateSpecializationKind)Record.readInt();
781 SourceLocation POI = readSourceLocation();
782 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
783 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
784 }
785}
786
787ASTDeclReader::RedeclarableResult
788ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
789 RedeclarableResult Redecl = VisitTagDecl(RD);
790 RD->setHasFlexibleArrayMember(Record.readInt());
791 RD->setAnonymousStructOrUnion(Record.readInt());
792 RD->setHasObjectMember(Record.readInt());
793 RD->setHasVolatileMember(Record.readInt());
794 RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
795 RD->setNonTrivialToPrimitiveCopy(Record.readInt());
796 RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
797 RD->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(Record.readInt());
798 RD->setHasNonTrivialToPrimitiveDestructCUnion(Record.readInt());
799 RD->setHasNonTrivialToPrimitiveCopyCUnion(Record.readInt());
800 RD->setParamDestroyedInCallee(Record.readInt());
801 RD->setArgPassingRestrictions((RecordDecl::ArgPassingKind)Record.readInt());
802 return Redecl;
803}
804
805void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
806 VisitNamedDecl(VD);
807 // For function declarations, defer reading the type in case the function has
808 // a deduced return type that references an entity declared within the
809 // function.
810 if (isa<FunctionDecl>(VD))
811 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
812 else
813 VD->setType(Record.readType());
814}
815
816void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
817 VisitValueDecl(ECD);
818 if (Record.readInt())
819 ECD->setInitExpr(Record.readExpr());
820 ECD->setInitVal(Record.readAPSInt());
821 mergeMergeable(ECD);
822}
823
824void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
825 VisitValueDecl(DD);
826 DD->setInnerLocStart(readSourceLocation());
827 if (Record.readInt()) { // hasExtInfo
828 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
829 Record.readQualifierInfo(*Info);
830 Info->TrailingRequiresClause = Record.readExpr();
831 DD->DeclInfo = Info;
832 }
833 QualType TSIType = Record.readType();
834 DD->setTypeSourceInfo(
835 TSIType.isNull() ? nullptr
836 : Reader.getContext().CreateTypeSourceInfo(TSIType));
837}
838
839void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
840 RedeclarableResult Redecl = VisitRedeclarable(FD);
841 VisitDeclaratorDecl(FD);
842
843 // Attach a type to this function. Use the real type if possible, but fall
844 // back to the type as written if it involves a deduced return type.
845 if (FD->getTypeSourceInfo() &&
846 FD->getTypeSourceInfo()->getType()->castAs<FunctionType>()
847 ->getReturnType()->getContainedAutoType()) {
848 // We'll set up the real type in Visit, once we've finished loading the
849 // function.
850 FD->setType(FD->getTypeSourceInfo()->getType());
851 Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
852 } else {
853 FD->setType(Reader.GetType(DeferredTypeID));
854 }
855 DeferredTypeID = 0;
856
857 FD->DNLoc = Record.readDeclarationNameLoc(FD->getDeclName());
858 FD->IdentifierNamespace = Record.readInt();
859
860 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
861 // after everything else is read.
862
863 FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
864 FD->setInlineSpecified(Record.readInt());
865 FD->setImplicitlyInline(Record.readInt());
866 FD->setVirtualAsWritten(Record.readInt());
867 FD->setPure(Record.readInt());
868 FD->setHasInheritedPrototype(Record.readInt());
869 FD->setHasWrittenPrototype(Record.readInt());
870 FD->setDeletedAsWritten(Record.readInt());
871 FD->setTrivial(Record.readInt());
872 FD->setTrivialForCall(Record.readInt());
873 FD->setDefaulted(Record.readInt());
874 FD->setExplicitlyDefaulted(Record.readInt());
875 FD->setHasImplicitReturnZero(Record.readInt());
876 FD->setConstexprKind(static_cast<ConstexprSpecKind>(Record.readInt()));
877 FD->setUsesSEHTry(Record.readInt());
878 FD->setHasSkippedBody(Record.readInt());
879 FD->setIsMultiVersion(Record.readInt());
880 FD->setLateTemplateParsed(Record.readInt());
881
882 FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
883 FD->EndRangeLoc = readSourceLocation();
884
885 FD->ODRHash = Record.readInt();
886 FD->setHasODRHash(true);
887 FD->setUsesFPIntrin(Record.readInt());
888
889 if (FD->isDefaulted()) {
890 if (unsigned NumLookups = Record.readInt()) {
891 SmallVector<DeclAccessPair, 8> Lookups;
892 for (unsigned I = 0; I != NumLookups; ++I) {
893 NamedDecl *ND = Record.readDeclAs<NamedDecl>();
894 AccessSpecifier AS = (AccessSpecifier)Record.readInt();
895 Lookups.push_back(DeclAccessPair::make(ND, AS));
896 }
897 FD->setDefaultedFunctionInfo(FunctionDecl::DefaultedFunctionInfo::Create(
898 Reader.getContext(), Lookups));
899 }
900 }
901
902 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
903 case FunctionDecl::TK_NonTemplate:
904 mergeRedeclarable(FD, Redecl);
905 break;
906 case FunctionDecl::TK_FunctionTemplate:
907 // Merged when we merge the template.
908 FD->setDescribedFunctionTemplate(readDeclAs<FunctionTemplateDecl>());
909 break;
910 case FunctionDecl::TK_MemberSpecialization: {
911 auto *InstFD = readDeclAs<FunctionDecl>();
912 auto TSK = (TemplateSpecializationKind)Record.readInt();
913 SourceLocation POI = readSourceLocation();
914 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
915 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
916 mergeRedeclarable(FD, Redecl);
917 break;
918 }
919 case FunctionDecl::TK_FunctionTemplateSpecialization: {
920 auto *Template = readDeclAs<FunctionTemplateDecl>();
921 auto TSK = (TemplateSpecializationKind)Record.readInt();
922
923 // Template arguments.
924 SmallVector<TemplateArgument, 8> TemplArgs;
925 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
926
927 // Template args as written.
928 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
929 SourceLocation LAngleLoc, RAngleLoc;
930 bool HasTemplateArgumentsAsWritten = Record.readInt();
931 if (HasTemplateArgumentsAsWritten) {
932 unsigned NumTemplateArgLocs = Record.readInt();
933 TemplArgLocs.reserve(NumTemplateArgLocs);
934 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
935 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
936
937 LAngleLoc = readSourceLocation();
938 RAngleLoc = readSourceLocation();
939 }
940
941 SourceLocation POI = readSourceLocation();
942
943 ASTContext &C = Reader.getContext();
944 TemplateArgumentList *TemplArgList
945 = TemplateArgumentList::CreateCopy(C, TemplArgs);
946 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
947 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
948 TemplArgsInfo.addArgument(TemplArgLocs[i]);
949
950 MemberSpecializationInfo *MSInfo = nullptr;
951 if (Record.readInt()) {
952 auto *FD = readDeclAs<FunctionDecl>();
953 auto TSK = (TemplateSpecializationKind)Record.readInt();
954 SourceLocation POI = readSourceLocation();
955
956 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
957 MSInfo->setPointOfInstantiation(POI);
958 }
959
960 FunctionTemplateSpecializationInfo *FTInfo =
961 FunctionTemplateSpecializationInfo::Create(
962 C, FD, Template, TSK, TemplArgList,
963 HasTemplateArgumentsAsWritten ? &TemplArgsInfo : nullptr, POI,
964 MSInfo);
965 FD->TemplateOrSpecialization = FTInfo;
966
967 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
968 // The template that contains the specializations set. It's not safe to
969 // use getCanonicalDecl on Template since it may still be initializing.
970 auto *CanonTemplate = readDeclAs<FunctionTemplateDecl>();
971 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
972 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
973 // FunctionTemplateSpecializationInfo's Profile().
974 // We avoid getASTContext because a decl in the parent hierarchy may
975 // be initializing.
976 llvm::FoldingSetNodeID ID;
977 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
978 void *InsertPos = nullptr;
979 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
980 FunctionTemplateSpecializationInfo *ExistingInfo =
981 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
982 if (InsertPos)
983 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
984 else {
985 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 986, __PRETTY_FUNCTION__))
986 "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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 986, __PRETTY_FUNCTION__))
;
987 mergeRedeclarable(FD, ExistingInfo->getFunction(), Redecl);
988 }
989 }
990 break;
991 }
992 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
993 // Templates.
994 UnresolvedSet<8> TemplDecls;
995 unsigned NumTemplates = Record.readInt();
996 while (NumTemplates--)
997 TemplDecls.addDecl(readDeclAs<NamedDecl>());
998
999 // Templates args.
1000 TemplateArgumentListInfo TemplArgs;
1001 unsigned NumArgs = Record.readInt();
1002 while (NumArgs--)
1003 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
1004 TemplArgs.setLAngleLoc(readSourceLocation());
1005 TemplArgs.setRAngleLoc(readSourceLocation());
1006
1007 FD->setDependentTemplateSpecialization(Reader.getContext(),
1008 TemplDecls, TemplArgs);
1009 // These are not merged; we don't need to merge redeclarations of dependent
1010 // template friends.
1011 break;
1012 }
1013 }
1014
1015 // Read in the parameters.
1016 unsigned NumParams = Record.readInt();
1017 SmallVector<ParmVarDecl *, 16> Params;
1018 Params.reserve(NumParams);
1019 for (unsigned I = 0; I != NumParams; ++I)
1020 Params.push_back(readDeclAs<ParmVarDecl>());
1021 FD->setParams(Reader.getContext(), Params);
1022}
1023
1024void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
1025 VisitNamedDecl(MD);
1026 if (Record.readInt()) {
1027 // Load the body on-demand. Most clients won't care, because method
1028 // definitions rarely show up in headers.
1029 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1030 HasPendingBody = true;
1031 }
1032 MD->setSelfDecl(readDeclAs<ImplicitParamDecl>());
1033 MD->setCmdDecl(readDeclAs<ImplicitParamDecl>());
1034 MD->setInstanceMethod(Record.readInt());
1035 MD->setVariadic(Record.readInt());
1036 MD->setPropertyAccessor(Record.readInt());
1037 MD->setSynthesizedAccessorStub(Record.readInt());
1038 MD->setDefined(Record.readInt());
1039 MD->setOverriding(Record.readInt());
1040 MD->setHasSkippedBody(Record.readInt());
1041
1042 MD->setIsRedeclaration(Record.readInt());
1043 MD->setHasRedeclaration(Record.readInt());
1044 if (MD->hasRedeclaration())
1045 Reader.getContext().setObjCMethodRedeclaration(MD,
1046 readDeclAs<ObjCMethodDecl>());
1047
1048 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1049 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1050 MD->setRelatedResultType(Record.readInt());
1051 MD->setReturnType(Record.readType());
1052 MD->setReturnTypeSourceInfo(readTypeSourceInfo());
1053 MD->DeclEndLoc = readSourceLocation();
1054 unsigned NumParams = Record.readInt();
1055 SmallVector<ParmVarDecl *, 16> Params;
1056 Params.reserve(NumParams);
1057 for (unsigned I = 0; I != NumParams; ++I)
1058 Params.push_back(readDeclAs<ParmVarDecl>());
1059
1060 MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1061 unsigned NumStoredSelLocs = Record.readInt();
1062 SmallVector<SourceLocation, 16> SelLocs;
1063 SelLocs.reserve(NumStoredSelLocs);
1064 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1065 SelLocs.push_back(readSourceLocation());
1066
1067 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1068}
1069
1070void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1071 VisitTypedefNameDecl(D);
1072
1073 D->Variance = Record.readInt();
1074 D->Index = Record.readInt();
1075 D->VarianceLoc = readSourceLocation();
1076 D->ColonLoc = readSourceLocation();
1077}
1078
1079void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1080 VisitNamedDecl(CD);
1081 CD->setAtStartLoc(readSourceLocation());
1082 CD->setAtEndRange(readSourceRange());
1083}
1084
1085ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1086 unsigned numParams = Record.readInt();
1087 if (numParams == 0)
1088 return nullptr;
1089
1090 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1091 typeParams.reserve(numParams);
1092 for (unsigned i = 0; i != numParams; ++i) {
1093 auto *typeParam = readDeclAs<ObjCTypeParamDecl>();
1094 if (!typeParam)
1095 return nullptr;
1096
1097 typeParams.push_back(typeParam);
1098 }
1099
1100 SourceLocation lAngleLoc = readSourceLocation();
1101 SourceLocation rAngleLoc = readSourceLocation();
1102
1103 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1104 typeParams, rAngleLoc);
1105}
1106
1107void ASTDeclReader::ReadObjCDefinitionData(
1108 struct ObjCInterfaceDecl::DefinitionData &Data) {
1109 // Read the superclass.
1110 Data.SuperClassTInfo = readTypeSourceInfo();
1111
1112 Data.EndLoc = readSourceLocation();
1113 Data.HasDesignatedInitializers = Record.readInt();
1114
1115 // Read the directly referenced protocols and their SourceLocations.
1116 unsigned NumProtocols = Record.readInt();
1117 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1118 Protocols.reserve(NumProtocols);
1119 for (unsigned I = 0; I != NumProtocols; ++I)
1120 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1121 SmallVector<SourceLocation, 16> ProtoLocs;
1122 ProtoLocs.reserve(NumProtocols);
1123 for (unsigned I = 0; I != NumProtocols; ++I)
1124 ProtoLocs.push_back(readSourceLocation());
1125 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1126 Reader.getContext());
1127
1128 // Read the transitive closure of protocols referenced by this class.
1129 NumProtocols = Record.readInt();
1130 Protocols.clear();
1131 Protocols.reserve(NumProtocols);
1132 for (unsigned I = 0; I != NumProtocols; ++I)
1133 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1134 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1135 Reader.getContext());
1136}
1137
1138void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1139 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1140 // FIXME: odr checking?
1141}
1142
1143void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1144 RedeclarableResult Redecl = VisitRedeclarable(ID);
1145 VisitObjCContainerDecl(ID);
1146 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1147 mergeRedeclarable(ID, Redecl);
1148
1149 ID->TypeParamList = ReadObjCTypeParamList();
1150 if (Record.readInt()) {
1151 // Read the definition.
1152 ID->allocateDefinitionData();
1153
1154 ReadObjCDefinitionData(ID->data());
1155 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1156 if (Canon->Data.getPointer()) {
1157 // If we already have a definition, keep the definition invariant and
1158 // merge the data.
1159 MergeDefinitionData(Canon, std::move(ID->data()));
1160 ID->Data = Canon->Data;
1161 } else {
1162 // Set the definition data of the canonical declaration, so other
1163 // redeclarations will see it.
1164 ID->getCanonicalDecl()->Data = ID->Data;
1165
1166 // We will rebuild this list lazily.
1167 ID->setIvarList(nullptr);
1168 }
1169
1170 // Note that we have deserialized a definition.
1171 Reader.PendingDefinitions.insert(ID);
1172
1173 // Note that we've loaded this Objective-C class.
1174 Reader.ObjCClassesLoaded.push_back(ID);
1175 } else {
1176 ID->Data = ID->getCanonicalDecl()->Data;
1177 }
1178}
1179
1180void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1181 VisitFieldDecl(IVD);
1182 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1183 // This field will be built lazily.
1184 IVD->setNextIvar(nullptr);
1185 bool synth = Record.readInt();
1186 IVD->setSynthesize(synth);
1187}
1188
1189void ASTDeclReader::ReadObjCDefinitionData(
1190 struct ObjCProtocolDecl::DefinitionData &Data) {
1191 unsigned NumProtoRefs = Record.readInt();
1192 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1193 ProtoRefs.reserve(NumProtoRefs);
1194 for (unsigned I = 0; I != NumProtoRefs; ++I)
1195 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1196 SmallVector<SourceLocation, 16> ProtoLocs;
1197 ProtoLocs.reserve(NumProtoRefs);
1198 for (unsigned I = 0; I != NumProtoRefs; ++I)
1199 ProtoLocs.push_back(readSourceLocation());
1200 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1201 ProtoLocs.data(), Reader.getContext());
1202}
1203
1204void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1205 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1206 // FIXME: odr checking?
1207}
1208
1209void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1210 RedeclarableResult Redecl = VisitRedeclarable(PD);
1211 VisitObjCContainerDecl(PD);
1212 mergeRedeclarable(PD, Redecl);
1213
1214 if (Record.readInt()) {
1215 // Read the definition.
1216 PD->allocateDefinitionData();
1217
1218 ReadObjCDefinitionData(PD->data());
1219
1220 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1221 if (Canon->Data.getPointer()) {
1222 // If we already have a definition, keep the definition invariant and
1223 // merge the data.
1224 MergeDefinitionData(Canon, std::move(PD->data()));
1225 PD->Data = Canon->Data;
1226 } else {
1227 // Set the definition data of the canonical declaration, so other
1228 // redeclarations will see it.
1229 PD->getCanonicalDecl()->Data = PD->Data;
1230 }
1231 // Note that we have deserialized a definition.
1232 Reader.PendingDefinitions.insert(PD);
1233 } else {
1234 PD->Data = PD->getCanonicalDecl()->Data;
1235 }
1236}
1237
1238void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1239 VisitFieldDecl(FD);
1240}
1241
1242void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1243 VisitObjCContainerDecl(CD);
1244 CD->setCategoryNameLoc(readSourceLocation());
1245 CD->setIvarLBraceLoc(readSourceLocation());
1246 CD->setIvarRBraceLoc(readSourceLocation());
1247
1248 // Note that this category has been deserialized. We do this before
1249 // deserializing the interface declaration, so that it will consider this
1250 /// category.
1251 Reader.CategoriesDeserialized.insert(CD);
1252
1253 CD->ClassInterface = readDeclAs<ObjCInterfaceDecl>();
1254 CD->TypeParamList = ReadObjCTypeParamList();
1255 unsigned NumProtoRefs = Record.readInt();
1256 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1257 ProtoRefs.reserve(NumProtoRefs);
1258 for (unsigned I = 0; I != NumProtoRefs; ++I)
1259 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1260 SmallVector<SourceLocation, 16> ProtoLocs;
1261 ProtoLocs.reserve(NumProtoRefs);
1262 for (unsigned I = 0; I != NumProtoRefs; ++I)
1263 ProtoLocs.push_back(readSourceLocation());
1264 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1265 Reader.getContext());
1266
1267 // Protocols in the class extension belong to the class.
1268 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1269 CD->ClassInterface->mergeClassExtensionProtocolList(
1270 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1271 Reader.getContext());
1272}
1273
1274void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1275 VisitNamedDecl(CAD);
1276 CAD->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1277}
1278
1279void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1280 VisitNamedDecl(D);
1281 D->setAtLoc(readSourceLocation());
1282 D->setLParenLoc(readSourceLocation());
1283 QualType T = Record.readType();
1284 TypeSourceInfo *TSI = readTypeSourceInfo();
1285 D->setType(T, TSI);
1286 D->setPropertyAttributes((ObjCPropertyAttribute::Kind)Record.readInt());
1287 D->setPropertyAttributesAsWritten(
1288 (ObjCPropertyAttribute::Kind)Record.readInt());
1289 D->setPropertyImplementation(
1290 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1291 DeclarationName GetterName = Record.readDeclarationName();
1292 SourceLocation GetterLoc = readSourceLocation();
1293 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1294 DeclarationName SetterName = Record.readDeclarationName();
1295 SourceLocation SetterLoc = readSourceLocation();
1296 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1297 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1298 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1299 D->setPropertyIvarDecl(readDeclAs<ObjCIvarDecl>());
1300}
1301
1302void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1303 VisitObjCContainerDecl(D);
1304 D->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1305}
1306
1307void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1308 VisitObjCImplDecl(D);
1309 D->CategoryNameLoc = readSourceLocation();
1310}
1311
1312void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1313 VisitObjCImplDecl(D);
1314 D->setSuperClass(readDeclAs<ObjCInterfaceDecl>());
1315 D->SuperLoc = readSourceLocation();
1316 D->setIvarLBraceLoc(readSourceLocation());
1317 D->setIvarRBraceLoc(readSourceLocation());
1318 D->setHasNonZeroConstructors(Record.readInt());
1319 D->setHasDestructors(Record.readInt());
1320 D->NumIvarInitializers = Record.readInt();
1321 if (D->NumIvarInitializers)
1322 D->IvarInitializers = ReadGlobalOffset();
1323}
1324
1325void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1326 VisitDecl(D);
1327 D->setAtLoc(readSourceLocation());
1328 D->setPropertyDecl(readDeclAs<ObjCPropertyDecl>());
1329 D->PropertyIvarDecl = readDeclAs<ObjCIvarDecl>();
1330 D->IvarLoc = readSourceLocation();
1331 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1332 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1333 D->setGetterCXXConstructor(Record.readExpr());
1334 D->setSetterCXXAssignment(Record.readExpr());
1335}
1336
1337void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1338 VisitDeclaratorDecl(FD);
1339 FD->Mutable = Record.readInt();
1340
1341 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1342 FD->InitStorage.setInt(ISK);
1343 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1344 ? Record.readType().getAsOpaquePtr()
1345 : Record.readExpr());
1346 }
1347
1348 if (auto *BW = Record.readExpr())
1349 FD->setBitWidth(BW);
1350
1351 if (!FD->getDeclName()) {
1352 if (auto *Tmpl = readDeclAs<FieldDecl>())
1353 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1354 }
1355 mergeMergeable(FD);
1356}
1357
1358void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1359 VisitDeclaratorDecl(PD);
1360 PD->GetterId = Record.readIdentifier();
1361 PD->SetterId = Record.readIdentifier();
1362}
1363
1364void ASTDeclReader::VisitMSGuidDecl(MSGuidDecl *D) {
1365 VisitValueDecl(D);
1366 D->PartVal.Part1 = Record.readInt();
1367 D->PartVal.Part2 = Record.readInt();
1368 D->PartVal.Part3 = Record.readInt();
1369 for (auto &C : D->PartVal.Part4And5)
1370 C = Record.readInt();
1371
1372 // Add this GUID to the AST context's lookup structure, and merge if needed.
1373 if (MSGuidDecl *Existing = Reader.getContext().MSGuidDecls.GetOrInsertNode(D))
1374 Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());
1375}
1376
1377void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1378 VisitValueDecl(FD);
1379
1380 FD->ChainingSize = Record.readInt();
1381 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1381, __PRETTY_FUNCTION__))
;
1382 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1383
1384 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1385 FD->Chaining[I] = readDeclAs<NamedDecl>();
1386
1387 mergeMergeable(FD);
1388}
1389
1390ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1391 RedeclarableResult Redecl = VisitRedeclarable(VD);
1392 VisitDeclaratorDecl(VD);
1393
1394 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1395 VD->VarDeclBits.TSCSpec = Record.readInt();
1396 VD->VarDeclBits.InitStyle = Record.readInt();
1397 VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1398 if (!isa<ParmVarDecl>(VD)) {
1399 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1400 Record.readInt();
1401 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1402 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1403 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1404 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1405 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1406 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1407 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1408 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1409 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1410 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1411 VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1412 }
1413 auto VarLinkage = Linkage(Record.readInt());
1414 VD->setCachedLinkage(VarLinkage);
1415
1416 // Reconstruct the one piece of the IdentifierNamespace that we need.
1417 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1418 VD->getLexicalDeclContext()->isFunctionOrMethod())
1419 VD->setLocalExternDecl();
1420
1421 if (uint64_t Val = Record.readInt()) {
1422 VD->setInit(Record.readExpr());
1423 if (Val > 1) {
1424 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1425 Eval->CheckedICE = true;
1426 Eval->IsICE = (Val & 1) != 0;
1427 Eval->HasConstantDestruction = (Val & 4) != 0;
1428 }
1429 }
1430
1431 if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1432 Expr *CopyExpr = Record.readExpr();
1433 if (CopyExpr)
1434 Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1435 }
1436
1437 if (VD->getStorageDuration() == SD_Static && Record.readInt()) {
1438 Reader.DefinitionSource[VD] =
1439 Loc.F->Kind == ModuleKind::MK_MainFile ||
1440 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1441 }
1442
1443 enum VarKind {
1444 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1445 };
1446 switch ((VarKind)Record.readInt()) {
1447 case VarNotTemplate:
1448 // Only true variables (not parameters or implicit parameters) can be
1449 // merged; the other kinds are not really redeclarable at all.
1450 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1451 !isa<VarTemplateSpecializationDecl>(VD))
1452 mergeRedeclarable(VD, Redecl);
1453 break;
1454 case VarTemplate:
1455 // Merged when we merge the template.
1456 VD->setDescribedVarTemplate(readDeclAs<VarTemplateDecl>());
1457 break;
1458 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1459 auto *Tmpl = readDeclAs<VarDecl>();
1460 auto TSK = (TemplateSpecializationKind)Record.readInt();
1461 SourceLocation POI = readSourceLocation();
1462 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1463 mergeRedeclarable(VD, Redecl);
1464 break;
1465 }
1466 }
1467
1468 return Redecl;
1469}
1470
1471void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1472 VisitVarDecl(PD);
1473}
1474
1475void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1476 VisitVarDecl(PD);
1477 unsigned isObjCMethodParam = Record.readInt();
1478 unsigned scopeDepth = Record.readInt();
1479 unsigned scopeIndex = Record.readInt();
1480 unsigned declQualifier = Record.readInt();
1481 if (isObjCMethodParam) {
1482 assert(scopeDepth == 0)((scopeDepth == 0) ? static_cast<void> (0) : __assert_fail
("scopeDepth == 0", "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1482, __PRETTY_FUNCTION__))
;
1483 PD->setObjCMethodScopeInfo(scopeIndex);
1484 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1485 } else {
1486 PD->setScopeInfo(scopeDepth, scopeIndex);
1487 }
1488 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1489 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1490 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1491 PD->setUninstantiatedDefaultArg(Record.readExpr());
1492
1493 // FIXME: If this is a redeclaration of a function from another module, handle
1494 // inheritance of default arguments.
1495}
1496
1497void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1498 VisitVarDecl(DD);
1499 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1500 for (unsigned I = 0; I != DD->NumBindings; ++I) {
1501 BDs[I] = readDeclAs<BindingDecl>();
1502 BDs[I]->setDecomposedDecl(DD);
1503 }
1504}
1505
1506void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1507 VisitValueDecl(BD);
1508 BD->Binding = Record.readExpr();
1509}
1510
1511void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1512 VisitDecl(AD);
1513 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1514 AD->setRParenLoc(readSourceLocation());
1515}
1516
1517void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1518 VisitDecl(BD);
1519 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1520 BD->setSignatureAsWritten(readTypeSourceInfo());
1521 unsigned NumParams = Record.readInt();
1522 SmallVector<ParmVarDecl *, 16> Params;
1523 Params.reserve(NumParams);
1524 for (unsigned I = 0; I != NumParams; ++I)
1525 Params.push_back(readDeclAs<ParmVarDecl>());
1526 BD->setParams(Params);
1527
1528 BD->setIsVariadic(Record.readInt());
1529 BD->setBlockMissingReturnType(Record.readInt());
1530 BD->setIsConversionFromLambda(Record.readInt());
1531 BD->setDoesNotEscape(Record.readInt());
1532 BD->setCanAvoidCopyToHeap(Record.readInt());
1533
1534 bool capturesCXXThis = Record.readInt();
1535 unsigned numCaptures = Record.readInt();
1536 SmallVector<BlockDecl::Capture, 16> captures;
1537 captures.reserve(numCaptures);
1538 for (unsigned i = 0; i != numCaptures; ++i) {
1539 auto *decl = readDeclAs<VarDecl>();
1540 unsigned flags = Record.readInt();
1541 bool byRef = (flags & 1);
1542 bool nested = (flags & 2);
1543 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1544
1545 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1546 }
1547 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1548}
1549
1550void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1551 VisitDecl(CD);
1552 unsigned ContextParamPos = Record.readInt();
1553 CD->setNothrow(Record.readInt() != 0);
1554 // Body is set by VisitCapturedStmt.
1555 for (unsigned I = 0; I < CD->NumParams; ++I) {
1556 if (I != ContextParamPos)
1557 CD->setParam(I, readDeclAs<ImplicitParamDecl>());
1558 else
1559 CD->setContextParam(I, readDeclAs<ImplicitParamDecl>());
1560 }
1561}
1562
1563void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1564 VisitDecl(D);
1565 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1566 D->setExternLoc(readSourceLocation());
1567 D->setRBraceLoc(readSourceLocation());
1568}
1569
1570void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1571 VisitDecl(D);
1572 D->RBraceLoc = readSourceLocation();
1573}
1574
1575void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1576 VisitNamedDecl(D);
1577 D->setLocStart(readSourceLocation());
1578}
1579
1580void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1581 RedeclarableResult Redecl = VisitRedeclarable(D);
1
Calling 'ASTDeclReader::VisitRedeclarable'
1582 VisitNamedDecl(D);
1583 D->setInline(Record.readInt());
1584 D->LocStart = readSourceLocation();
1585 D->RBraceLoc = readSourceLocation();
1586
1587 // Defer loading the anonymous namespace until we've finished merging
1588 // this namespace; loading it might load a later declaration of the
1589 // same namespace, and we have an invariant that older declarations
1590 // get merged before newer ones try to merge.
1591 GlobalDeclID AnonNamespace = 0;
1592 if (Redecl.getFirstID() == ThisDeclID) {
1593 AnonNamespace = readDeclID();
1594 } else {
1595 // Link this namespace back to the first declaration, which has already
1596 // been deserialized.
1597 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1598 }
1599
1600 mergeRedeclarable(D, Redecl);
1601
1602 if (AnonNamespace) {
1603 // Each module has its own anonymous namespace, which is disjoint from
1604 // any other module's anonymous namespaces, so don't attach the anonymous
1605 // namespace at all.
1606 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1607 if (!Record.isModule())
1608 D->setAnonymousNamespace(Anon);
1609 }
1610}
1611
1612void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1613 RedeclarableResult Redecl = VisitRedeclarable(D);
1614 VisitNamedDecl(D);
1615 D->NamespaceLoc = readSourceLocation();
1616 D->IdentLoc = readSourceLocation();
1617 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1618 D->Namespace = readDeclAs<NamedDecl>();
1619 mergeRedeclarable(D, Redecl);
1620}
1621
1622void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1623 VisitNamedDecl(D);
1624 D->setUsingLoc(readSourceLocation());
1625 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1626 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1627 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1628 D->setTypename(Record.readInt());
1629 if (auto *Pattern = readDeclAs<NamedDecl>())
1630 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1631 mergeMergeable(D);
1632}
1633
1634void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1635 VisitNamedDecl(D);
1636 D->InstantiatedFrom = readDeclAs<NamedDecl>();
1637 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1638 for (unsigned I = 0; I != D->NumExpansions; ++I)
1639 Expansions[I] = readDeclAs<NamedDecl>();
1640 mergeMergeable(D);
1641}
1642
1643void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1644 RedeclarableResult Redecl = VisitRedeclarable(D);
1645 VisitNamedDecl(D);
1646 D->Underlying = readDeclAs<NamedDecl>();
1647 D->IdentifierNamespace = Record.readInt();
1648 D->UsingOrNextShadow = readDeclAs<NamedDecl>();
1649 auto *Pattern = readDeclAs<UsingShadowDecl>();
1650 if (Pattern)
1651 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1652 mergeRedeclarable(D, Redecl);
1653}
1654
1655void ASTDeclReader::VisitConstructorUsingShadowDecl(
1656 ConstructorUsingShadowDecl *D) {
1657 VisitUsingShadowDecl(D);
1658 D->NominatedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1659 D->ConstructedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1660 D->IsVirtual = Record.readInt();
1661}
1662
1663void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1664 VisitNamedDecl(D);
1665 D->UsingLoc = readSourceLocation();
1666 D->NamespaceLoc = readSourceLocation();
1667 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1668 D->NominatedNamespace = readDeclAs<NamedDecl>();
1669 D->CommonAncestor = readDeclAs<DeclContext>();
1670}
1671
1672void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1673 VisitValueDecl(D);
1674 D->setUsingLoc(readSourceLocation());
1675 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1676 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1677 D->EllipsisLoc = readSourceLocation();
1678 mergeMergeable(D);
1679}
1680
1681void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1682 UnresolvedUsingTypenameDecl *D) {
1683 VisitTypeDecl(D);
1684 D->TypenameLocation = readSourceLocation();
1685 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1686 D->EllipsisLoc = readSourceLocation();
1687 mergeMergeable(D);
1688}
1689
1690void ASTDeclReader::ReadCXXDefinitionData(
1691 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1692 #define FIELD(Name, Width, Merge) \
1693 Data.Name = Record.readInt();
1694 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1695
1696 // Note: the caller has deserialized the IsLambda bit already.
1697 Data.ODRHash = Record.readInt();
1698 Data.HasODRHash = true;
1699
1700 if (Record.readInt()) {
1701 Reader.DefinitionSource[D] =
1702 Loc.F->Kind == ModuleKind::MK_MainFile ||
1703 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1704 }
1705
1706 Data.NumBases = Record.readInt();
1707 if (Data.NumBases)
1708 Data.Bases = ReadGlobalOffset();
1709 Data.NumVBases = Record.readInt();
1710 if (Data.NumVBases)
1711 Data.VBases = ReadGlobalOffset();
1712
1713 Record.readUnresolvedSet(Data.Conversions);
1714 Data.ComputedVisibleConversions = Record.readInt();
1715 if (Data.ComputedVisibleConversions)
1716 Record.readUnresolvedSet(Data.VisibleConversions);
1717 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1717, __PRETTY_FUNCTION__))
;
1718 Data.FirstFriend = readDeclID();
1719
1720 if (Data.IsLambda) {
1721 using Capture = LambdaCapture;
1722
1723 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1724 Lambda.Dependent = Record.readInt();
1725 Lambda.IsGenericLambda = Record.readInt();
1726 Lambda.CaptureDefault = Record.readInt();
1727 Lambda.NumCaptures = Record.readInt();
1728 Lambda.NumExplicitCaptures = Record.readInt();
1729 Lambda.HasKnownInternalLinkage = Record.readInt();
1730 Lambda.ManglingNumber = Record.readInt();
1731 Lambda.ContextDecl = readDeclID();
1732 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1733 sizeof(Capture) * Lambda.NumCaptures);
1734 Capture *ToCapture = Lambda.Captures;
1735 Lambda.MethodTyInfo = readTypeSourceInfo();
1736 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1737 SourceLocation Loc = readSourceLocation();
1738 bool IsImplicit = Record.readInt();
1739 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1740 switch (Kind) {
1741 case LCK_StarThis:
1742 case LCK_This:
1743 case LCK_VLAType:
1744 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1745 break;
1746 case LCK_ByCopy:
1747 case LCK_ByRef:
1748 auto *Var = readDeclAs<VarDecl>();
1749 SourceLocation EllipsisLoc = readSourceLocation();
1750 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1751 break;
1752 }
1753 }
1754 }
1755}
1756
1757void ASTDeclReader::MergeDefinitionData(
1758 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1759 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1760, __PRETTY_FUNCTION__))
1760 "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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1760, __PRETTY_FUNCTION__))
;
1761 auto &DD = *D->DefinitionData;
1762
1763 if (DD.Definition != MergeDD.Definition) {
1764 // Track that we merged the definitions.
1765 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1766 DD.Definition));
1767 Reader.PendingDefinitions.erase(MergeDD.Definition);
1768 MergeDD.Definition->setCompleteDefinition(false);
1769 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1770 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1771, __PRETTY_FUNCTION__))
1771 "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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1771, __PRETTY_FUNCTION__))
;
1772 }
1773
1774 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1775 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1776 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1777 // We faked up this definition data because we found a class for which we'd
1778 // not yet loaded the definition. Replace it with the real thing now.
1779 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1779, __PRETTY_FUNCTION__))
;
1780 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1781
1782 // Don't change which declaration is the definition; that is required
1783 // to be invariant once we select it.
1784 auto *Def = DD.Definition;
1785 DD = std::move(MergeDD);
1786 DD.Definition = Def;
1787 return;
1788 }
1789
1790 bool DetectedOdrViolation = false;
1791
1792 #define FIELD(Name, Width, Merge) Merge(Name)
1793 #define MERGE_OR(Field) DD.Field |= MergeDD.Field;
1794 #define NO_MERGE(Field) \
1795 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1796 MERGE_OR(Field)
1797 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1798 NO_MERGE(IsLambda)
1799 #undef NO_MERGE
1800 #undef MERGE_OR
1801
1802 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1803 DetectedOdrViolation = true;
1804 // FIXME: Issue a diagnostic if the base classes don't match when we come
1805 // to lazily load them.
1806
1807 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1808 // match when we come to lazily load them.
1809 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1810 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1811 DD.ComputedVisibleConversions = true;
1812 }
1813
1814 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1815 // lazily load it.
1816
1817 if (DD.IsLambda) {
1818 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1819 // when they occur within the body of a function template specialization).
1820 }
1821
1822 if (D->getODRHash() != MergeDD.ODRHash) {
1823 DetectedOdrViolation = true;
1824 }
1825
1826 if (DetectedOdrViolation)
1827 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1828 {MergeDD.Definition, &MergeDD});
1829}
1830
1831void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1832 struct CXXRecordDecl::DefinitionData *DD;
1833 ASTContext &C = Reader.getContext();
1834
1835 // Determine whether this is a lambda closure type, so that we can
1836 // allocate the appropriate DefinitionData structure.
1837 bool IsLambda = Record.readInt();
1838 if (IsLambda)
1839 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1840 LCD_None);
1841 else
1842 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1843
1844 CXXRecordDecl *Canon = D->getCanonicalDecl();
1845 // Set decl definition data before reading it, so that during deserialization
1846 // when we read CXXRecordDecl, it already has definition data and we don't
1847 // set fake one.
1848 if (!Canon->DefinitionData)
1849 Canon->DefinitionData = DD;
1850 D->DefinitionData = Canon->DefinitionData;
1851 ReadCXXDefinitionData(*DD, D);
1852
1853 // We might already have a different definition for this record. This can
1854 // happen either because we're reading an update record, or because we've
1855 // already done some merging. Either way, just merge into it.
1856 if (Canon->DefinitionData != DD) {
1857 MergeDefinitionData(Canon, std::move(*DD));
1858 return;
1859 }
1860
1861 // Mark this declaration as being a definition.
1862 D->setCompleteDefinition(true);
1863
1864 // If this is not the first declaration or is an update record, we can have
1865 // other redeclarations already. Make a note that we need to propagate the
1866 // DefinitionData pointer onto them.
1867 if (Update || Canon != D)
1868 Reader.PendingDefinitions.insert(D);
1869}
1870
1871ASTDeclReader::RedeclarableResult
1872ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1873 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1874
1875 ASTContext &C = Reader.getContext();
1876
1877 enum CXXRecKind {
1878 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1879 };
1880 switch ((CXXRecKind)Record.readInt()) {
1881 case CXXRecNotTemplate:
1882 // Merged when we merge the folding set entry in the primary template.
1883 if (!isa<ClassTemplateSpecializationDecl>(D))
1884 mergeRedeclarable(D, Redecl);
1885 break;
1886 case CXXRecTemplate: {
1887 // Merged when we merge the template.
1888 auto *Template = readDeclAs<ClassTemplateDecl>();
1889 D->TemplateOrInstantiation = Template;
1890 if (!Template->getTemplatedDecl()) {
1891 // We've not actually loaded the ClassTemplateDecl yet, because we're
1892 // currently being loaded as its pattern. Rely on it to set up our
1893 // TypeForDecl (see VisitClassTemplateDecl).
1894 //
1895 // Beware: we do not yet know our canonical declaration, and may still
1896 // get merged once the surrounding class template has got off the ground.
1897 DeferredTypeID = 0;
1898 }
1899 break;
1900 }
1901 case CXXRecMemberSpecialization: {
1902 auto *RD = readDeclAs<CXXRecordDecl>();
1903 auto TSK = (TemplateSpecializationKind)Record.readInt();
1904 SourceLocation POI = readSourceLocation();
1905 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1906 MSI->setPointOfInstantiation(POI);
1907 D->TemplateOrInstantiation = MSI;
1908 mergeRedeclarable(D, Redecl);
1909 break;
1910 }
1911 }
1912
1913 bool WasDefinition = Record.readInt();
1914 if (WasDefinition)
1915 ReadCXXRecordDefinition(D, /*Update*/false);
1916 else
1917 // Propagate DefinitionData pointer from the canonical declaration.
1918 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1919
1920 // Lazily load the key function to avoid deserializing every method so we can
1921 // compute it.
1922 if (WasDefinition) {
1923 DeclID KeyFn = readDeclID();
1924 if (KeyFn && D->isCompleteDefinition())
1925 // FIXME: This is wrong for the ARM ABI, where some other module may have
1926 // made this function no longer be a key function. We need an update
1927 // record or similar for that case.
1928 C.KeyFunctions[D] = KeyFn;
1929 }
1930
1931 return Redecl;
1932}
1933
1934void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1935 D->setExplicitSpecifier(Record.readExplicitSpec());
1936 VisitFunctionDecl(D);
1937 D->setIsCopyDeductionCandidate(Record.readInt());
1938}
1939
1940void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1941 VisitFunctionDecl(D);
1942
1943 unsigned NumOverridenMethods = Record.readInt();
1944 if (D->isCanonicalDecl()) {
1945 while (NumOverridenMethods--) {
1946 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1947 // MD may be initializing.
1948 if (auto *MD = readDeclAs<CXXMethodDecl>())
1949 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1950 }
1951 } else {
1952 // We don't care about which declarations this used to override; we get
1953 // the relevant information from the canonical declaration.
1954 Record.skipInts(NumOverridenMethods);
1955 }
1956}
1957
1958void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1959 // We need the inherited constructor information to merge the declaration,
1960 // so we have to read it before we call VisitCXXMethodDecl.
1961 D->setExplicitSpecifier(Record.readExplicitSpec());
1962 if (D->isInheritingConstructor()) {
1963 auto *Shadow = readDeclAs<ConstructorUsingShadowDecl>();
1964 auto *Ctor = readDeclAs<CXXConstructorDecl>();
1965 *D->getTrailingObjects<InheritedConstructor>() =
1966 InheritedConstructor(Shadow, Ctor);
1967 }
1968
1969 VisitCXXMethodDecl(D);
1970}
1971
1972void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1973 VisitCXXMethodDecl(D);
1974
1975 if (auto *OperatorDelete = readDeclAs<FunctionDecl>()) {
1976 CXXDestructorDecl *Canon = D->getCanonicalDecl();
1977 auto *ThisArg = Record.readExpr();
1978 // FIXME: Check consistency if we have an old and new operator delete.
1979 if (!Canon->OperatorDelete) {
1980 Canon->OperatorDelete = OperatorDelete;
1981 Canon->OperatorDeleteThisArg = ThisArg;
1982 }
1983 }
1984}
1985
1986void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1987 D->setExplicitSpecifier(Record.readExplicitSpec());
1988 VisitCXXMethodDecl(D);
1989}
1990
1991void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1992 VisitDecl(D);
1993 D->ImportedModule = readModule();
1994 D->setImportComplete(Record.readInt());
1995 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
1996 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1997 StoredLocs[I] = readSourceLocation();
1998 Record.skipInts(1); // The number of stored source locations.
1999}
2000
2001void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
2002 VisitDecl(D);
2003 D->setColonLoc(readSourceLocation());
2004}
2005
2006void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
2007 VisitDecl(D);
2008 if (Record.readInt()) // hasFriendDecl
2009 D->Friend = readDeclAs<NamedDecl>();
2010 else
2011 D->Friend = readTypeSourceInfo();
2012 for (unsigned i = 0; i != D->NumTPLists; ++i)
2013 D->getTrailingObjects<TemplateParameterList *>()[i] =
2014 Record.readTemplateParameterList();
2015 D->NextFriend = readDeclID();
2016 D->UnsupportedFriend = (Record.readInt() != 0);
2017 D->FriendLoc = readSourceLocation();
2018}
2019
2020void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
2021 VisitDecl(D);
2022 unsigned NumParams = Record.readInt();
2023 D->NumParams = NumParams;
2024 D->Params = new TemplateParameterList*[NumParams];
2025 for (unsigned i = 0; i != NumParams; ++i)
2026 D->Params[i] = Record.readTemplateParameterList();
2027 if (Record.readInt()) // HasFriendDecl
2028 D->Friend = readDeclAs<NamedDecl>();
2029 else
2030 D->Friend = readTypeSourceInfo();
2031 D->FriendLoc = readSourceLocation();
2032}
2033
2034DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2035 VisitNamedDecl(D);
2036
2037 DeclID PatternID = readDeclID();
2038 auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2039 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2040 D->init(TemplatedDecl, TemplateParams);
2041
2042 return PatternID;
2043}
2044
2045void ASTDeclReader::VisitConceptDecl(ConceptDecl *D) {
2046 VisitTemplateDecl(D);
2047 D->ConstraintExpr = Record.readExpr();
2048 mergeMergeable(D);
2049}
2050
2051void ASTDeclReader::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) {
2052}
2053
2054ASTDeclReader::RedeclarableResult
2055ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2056 RedeclarableResult Redecl = VisitRedeclarable(D);
2057
2058 // Make sure we've allocated the Common pointer first. We do this before
2059 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2060 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2061 if (!CanonD->Common) {
2062 CanonD->Common = CanonD->newCommon(Reader.getContext());
2063 Reader.PendingDefinitions.insert(CanonD);
2064 }
2065 D->Common = CanonD->Common;
2066
2067 // If this is the first declaration of the template, fill in the information
2068 // for the 'common' pointer.
2069 if (ThisDeclID == Redecl.getFirstID()) {
2070 if (auto *RTD = readDeclAs<RedeclarableTemplateDecl>()) {
2071 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2072, __PRETTY_FUNCTION__))
2072 "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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2072, __PRETTY_FUNCTION__))
;
2073 D->setInstantiatedFromMemberTemplate(RTD);
2074 if (Record.readInt())
2075 D->setMemberSpecialization();
2076 }
2077 }
2078
2079 DeclID PatternID = VisitTemplateDecl(D);
2080 D->IdentifierNamespace = Record.readInt();
2081
2082 mergeRedeclarable(D, Redecl, PatternID);
2083
2084 // If we merged the template with a prior declaration chain, merge the common
2085 // pointer.
2086 // FIXME: Actually merge here, don't just overwrite.
2087 D->Common = D->getCanonicalDecl()->Common;
2088
2089 return Redecl;
2090}
2091
2092void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2093 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2094
2095 if (ThisDeclID == Redecl.getFirstID()) {
2096 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2097 // the specializations.
2098 SmallVector<serialization::DeclID, 32> SpecIDs;
2099 readDeclIDList(SpecIDs);
2100 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2101 }
2102
2103 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2104 // We were loaded before our templated declaration was. We've not set up
2105 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2106 // it now.
2107 Reader.getContext().getInjectedClassNameType(
2108 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2109 }
2110}
2111
2112void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2113 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2113)
;
2114}
2115
2116/// TODO: Unify with ClassTemplateDecl version?
2117/// May require unifying ClassTemplateDecl and
2118/// VarTemplateDecl beyond TemplateDecl...
2119void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2120 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2121
2122 if (ThisDeclID == Redecl.getFirstID()) {
2123 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2124 // the specializations.
2125 SmallVector<serialization::DeclID, 32> SpecIDs;
2126 readDeclIDList(SpecIDs);
2127 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2128 }
2129}
2130
2131ASTDeclReader::RedeclarableResult
2132ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2133 ClassTemplateSpecializationDecl *D) {
2134 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2135
2136 ASTContext &C = Reader.getContext();
2137 if (Decl *InstD = readDecl()) {
2138 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2139 D->SpecializedTemplate = CTD;
2140 } else {
2141 SmallVector<TemplateArgument, 8> TemplArgs;
2142 Record.readTemplateArgumentList(TemplArgs);
2143 TemplateArgumentList *ArgList
2144 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2145 auto *PS =
2146 new (C) ClassTemplateSpecializationDecl::
2147 SpecializedPartialSpecialization();
2148 PS->PartialSpecialization
2149 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2150 PS->TemplateArgs = ArgList;
2151 D->SpecializedTemplate = PS;
2152 }
2153 }
2154
2155 SmallVector<TemplateArgument, 8> TemplArgs;
2156 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2157 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2158 D->PointOfInstantiation = readSourceLocation();
2159 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2160
2161 bool writtenAsCanonicalDecl = Record.readInt();
2162 if (writtenAsCanonicalDecl) {
2163 auto *CanonPattern = readDeclAs<ClassTemplateDecl>();
2164 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2165 // Set this as, or find, the canonical declaration for this specialization
2166 ClassTemplateSpecializationDecl *CanonSpec;
2167 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2168 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2169 .GetOrInsertNode(Partial);
2170 } else {
2171 CanonSpec =
2172 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2173 }
2174 // If there was already a canonical specialization, merge into it.
2175 if (CanonSpec != D) {
2176 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2177
2178 // This declaration might be a definition. Merge with any existing
2179 // definition.
2180 if (auto *DDD = D->DefinitionData) {
2181 if (CanonSpec->DefinitionData)
2182 MergeDefinitionData(CanonSpec, std::move(*DDD));
2183 else
2184 CanonSpec->DefinitionData = D->DefinitionData;
2185 }
2186 D->DefinitionData = CanonSpec->DefinitionData;
2187 }
2188 }
2189 }
2190
2191 // Explicit info.
2192 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2193 auto *ExplicitInfo =
2194 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2195 ExplicitInfo->TypeAsWritten = TyInfo;
2196 ExplicitInfo->ExternLoc = readSourceLocation();
2197 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2198 D->ExplicitInfo = ExplicitInfo;
2199 }
2200
2201 return Redecl;
2202}
2203
2204void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2205 ClassTemplatePartialSpecializationDecl *D) {
2206 // We need to read the template params first because redeclarable is going to
2207 // need them for profiling
2208 TemplateParameterList *Params = Record.readTemplateParameterList();
2209 D->TemplateParams = Params;
2210 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2211
2212 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2213
2214 // These are read/set from/to the first declaration.
2215 if (ThisDeclID == Redecl.getFirstID()) {
2216 D->InstantiatedFromMember.setPointer(
2217 readDeclAs<ClassTemplatePartialSpecializationDecl>());
2218 D->InstantiatedFromMember.setInt(Record.readInt());
2219 }
2220}
2221
2222void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2223 ClassScopeFunctionSpecializationDecl *D) {
2224 VisitDecl(D);
2225 D->Specialization = readDeclAs<CXXMethodDecl>();
2226 if (Record.readInt())
2227 D->TemplateArgs = Record.readASTTemplateArgumentListInfo();
2228}
2229
2230void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2231 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2232
2233 if (ThisDeclID == Redecl.getFirstID()) {
2234 // This FunctionTemplateDecl owns a CommonPtr; read it.
2235 SmallVector<serialization::DeclID, 32> SpecIDs;
2236 readDeclIDList(SpecIDs);
2237 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2238 }
2239}
2240
2241/// TODO: Unify with ClassTemplateSpecializationDecl version?
2242/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2243/// VarTemplate(Partial)SpecializationDecl with a new data
2244/// structure Template(Partial)SpecializationDecl, and
2245/// using Template(Partial)SpecializationDecl as input type.
2246ASTDeclReader::RedeclarableResult
2247ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2248 VarTemplateSpecializationDecl *D) {
2249 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2250
2251 ASTContext &C = Reader.getContext();
2252 if (Decl *InstD = readDecl()) {
2253 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2254 D->SpecializedTemplate = VTD;
2255 } else {
2256 SmallVector<TemplateArgument, 8> TemplArgs;
2257 Record.readTemplateArgumentList(TemplArgs);
2258 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2259 C, TemplArgs);
2260 auto *PS =
2261 new (C)
2262 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2263 PS->PartialSpecialization =
2264 cast<VarTemplatePartialSpecializationDecl>(InstD);
2265 PS->TemplateArgs = ArgList;
2266 D->SpecializedTemplate = PS;
2267 }
2268 }
2269
2270 // Explicit info.
2271 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2272 auto *ExplicitInfo =
2273 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2274 ExplicitInfo->TypeAsWritten = TyInfo;
2275 ExplicitInfo->ExternLoc = readSourceLocation();
2276 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2277 D->ExplicitInfo = ExplicitInfo;
2278 }
2279
2280 SmallVector<TemplateArgument, 8> TemplArgs;
2281 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2282 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2283 D->PointOfInstantiation = readSourceLocation();
2284 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2285 D->IsCompleteDefinition = Record.readInt();
2286
2287 bool writtenAsCanonicalDecl = Record.readInt();
2288 if (writtenAsCanonicalDecl) {
2289 auto *CanonPattern = readDeclAs<VarTemplateDecl>();
2290 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2291 // FIXME: If it's already present, merge it.
2292 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2293 CanonPattern->getCommonPtr()->PartialSpecializations
2294 .GetOrInsertNode(Partial);
2295 } else {
2296 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2297 }
2298 }
2299 }
2300
2301 return Redecl;
2302}
2303
2304/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2305/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2306/// VarTemplate(Partial)SpecializationDecl with a new data
2307/// structure Template(Partial)SpecializationDecl, and
2308/// using Template(Partial)SpecializationDecl as input type.
2309void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2310 VarTemplatePartialSpecializationDecl *D) {
2311 TemplateParameterList *Params = Record.readTemplateParameterList();
2312 D->TemplateParams = Params;
2313 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2314
2315 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2316
2317 // These are read/set from/to the first declaration.
2318 if (ThisDeclID == Redecl.getFirstID()) {
2319 D->InstantiatedFromMember.setPointer(
2320 readDeclAs<VarTemplatePartialSpecializationDecl>());
2321 D->InstantiatedFromMember.setInt(Record.readInt());
2322 }
2323}
2324
2325void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2326 VisitTypeDecl(D);
2327
2328 D->setDeclaredWithTypename(Record.readInt());
2329
2330 if (Record.readBool()) {
2331 NestedNameSpecifierLoc NNS = Record.readNestedNameSpecifierLoc();
2332 DeclarationNameInfo DN = Record.readDeclarationNameInfo();
2333 ConceptDecl *NamedConcept = Record.readDeclAs<ConceptDecl>();
2334 const ASTTemplateArgumentListInfo *ArgsAsWritten = nullptr;
2335 if (Record.readBool())
2336 ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2337 Expr *ImmediatelyDeclaredConstraint = Record.readExpr();
2338 D->setTypeConstraint(NNS, DN, /*FoundDecl=*/nullptr, NamedConcept,
2339 ArgsAsWritten, ImmediatelyDeclaredConstraint);
2340 if ((D->ExpandedParameterPack = Record.readInt()))
2341 D->NumExpanded = Record.readInt();
2342 }
2343
2344 if (Record.readInt())
2345 D->setDefaultArgument(readTypeSourceInfo());
2346}
2347
2348void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2349 VisitDeclaratorDecl(D);
2350 // TemplateParmPosition.
2351 D->setDepth(Record.readInt());
2352 D->setPosition(Record.readInt());
2353 if (D->hasPlaceholderTypeConstraint())
2354 D->setPlaceholderTypeConstraint(Record.readExpr());
2355 if (D->isExpandedParameterPack()) {
2356 auto TypesAndInfos =
2357 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2358 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2359 new (&TypesAndInfos[I].first) QualType(Record.readType());
2360 TypesAndInfos[I].second = readTypeSourceInfo();
2361 }
2362 } else {
2363 // Rest of NonTypeTemplateParmDecl.
2364 D->ParameterPack = Record.readInt();
2365 if (Record.readInt())
2366 D->setDefaultArgument(Record.readExpr());
2367 }
2368}
2369
2370void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2371 VisitTemplateDecl(D);
2372 // TemplateParmPosition.
2373 D->setDepth(Record.readInt());
2374 D->setPosition(Record.readInt());
2375 if (D->isExpandedParameterPack()) {
2376 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2377 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2378 I != N; ++I)
2379 Data[I] = Record.readTemplateParameterList();
2380 } else {
2381 // Rest of TemplateTemplateParmDecl.
2382 D->ParameterPack = Record.readInt();
2383 if (Record.readInt())
2384 D->setDefaultArgument(Reader.getContext(),
2385 Record.readTemplateArgumentLoc());
2386 }
2387}
2388
2389void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2390 VisitRedeclarableTemplateDecl(D);
2391}
2392
2393void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2394 VisitDecl(D);
2395 D->AssertExprAndFailed.setPointer(Record.readExpr());
2396 D->AssertExprAndFailed.setInt(Record.readInt());
2397 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2398 D->RParenLoc = readSourceLocation();
2399}
2400
2401void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2402 VisitDecl(D);
2403}
2404
2405void ASTDeclReader::VisitLifetimeExtendedTemporaryDecl(
2406 LifetimeExtendedTemporaryDecl *D) {
2407 VisitDecl(D);
2408 D->ExtendingDecl = readDeclAs<ValueDecl>();
2409 D->ExprWithTemporary = Record.readStmt();
2410 if (Record.readInt())
2411 D->Value = new (D->getASTContext()) APValue(Record.readAPValue());
2412 D->ManglingNumber = Record.readInt();
2413 mergeMergeable(D);
2414}
2415
2416std::pair<uint64_t, uint64_t>
2417ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2418 uint64_t LexicalOffset = ReadLocalOffset();
2419 uint64_t VisibleOffset = ReadLocalOffset();
2420 return std::make_pair(LexicalOffset, VisibleOffset);
2421}
2422
2423template <typename T>
2424ASTDeclReader::RedeclarableResult
2425ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2426 DeclID FirstDeclID = readDeclID();
2427 Decl *MergeWith = nullptr;
2428
2429 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2
Assuming 'FirstDeclID' is not equal to field 'ThisDeclID'
2430 bool IsFirstLocalDecl = false;
2431
2432 uint64_t RedeclOffset = 0;
2433
2434 // 0 indicates that this declaration was the only declaration of its entity,
2435 // and is used for space optimization.
2436 if (FirstDeclID == 0) {
3
Assuming 'FirstDeclID' is not equal to 0
4
Taking false branch
2437 FirstDeclID = ThisDeclID;
2438 IsKeyDecl = true;
2439 IsFirstLocalDecl = true;
2440 } else if (unsigned N = Record.readInt()) {
5
Assuming 'N' is 0
6
Taking false branch
2441 // This declaration was the first local declaration, but may have imported
2442 // other declarations.
2443 IsKeyDecl = N == 1;
2444 IsFirstLocalDecl = true;
2445
2446 // We have some declarations that must be before us in our redeclaration
2447 // chain. Read them now, and remember that we ought to merge with one of
2448 // them.
2449 // FIXME: Provide a known merge target to the second and subsequent such
2450 // declaration.
2451 for (unsigned I = 0; I != N - 1; ++I)
2452 MergeWith = readDecl();
2453
2454 RedeclOffset = ReadLocalOffset();
2455 } else {
2456 // This declaration was not the first local declaration. Read the first
2457 // local declaration now, to trigger the import of other redeclarations.
2458 (void)readDecl();
2459 }
2460
2461 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
7
Assuming null pointer is passed into cast
8
'FirstDecl' initialized to a null pointer value
2462 if (FirstDecl != D) {
9
Assuming 'FirstDecl' is not equal to 'D'
10
Taking true branch
2463 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2464 // We temporarily set the first (canonical) declaration as the previous one
2465 // which is the one that matters and mark the real previous DeclID to be
2466 // loaded & attached later on.
2467 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2468 D->First = FirstDecl->getCanonicalDecl();
11
Called C++ object pointer is null
2469 }
2470
2471 auto *DAsT = static_cast<T *>(D);
2472
2473 // Note that we need to load local redeclarations of this decl and build a
2474 // decl chain for them. This must happen *after* we perform the preloading
2475 // above; this ensures that the redeclaration chain is built in the correct
2476 // order.
2477 if (IsFirstLocalDecl)
2478 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2479
2480 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2481}
2482
2483/// Attempts to merge the given declaration (D) with another declaration
2484/// of the same entity.
2485template<typename T>
2486void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2487 RedeclarableResult &Redecl,
2488 DeclID TemplatePatternID) {
2489 // If modules are not available, there is no reason to perform this merge.
2490 if (!Reader.getContext().getLangOpts().Modules)
2491 return;
2492
2493 // If we're not the canonical declaration, we don't need to merge.
2494 if (!DBase->isFirstDecl())
2495 return;
2496
2497 auto *D = static_cast<T *>(DBase);
2498
2499 if (auto *Existing = Redecl.getKnownMergeTarget())
2500 // We already know of an existing declaration we should merge with.
2501 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2502 else if (FindExistingResult ExistingRes = findExisting(D))
2503 if (T *Existing = ExistingRes)
2504 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2505}
2506
2507/// "Cast" to type T, asserting if we don't have an implicit conversion.
2508/// We use this to put code in a template that will only be valid for certain
2509/// instantiations.
2510template<typename T> static T assert_cast(T t) { return t; }
2511template<typename T> static T assert_cast(...) {
2512 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2512)
;
2513}
2514
2515/// Merge together the pattern declarations from two template
2516/// declarations.
2517void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2518 RedeclarableTemplateDecl *Existing,
2519 DeclID DsID, bool IsKeyDecl) {
2520 auto *DPattern = D->getTemplatedDecl();
2521 auto *ExistingPattern = Existing->getTemplatedDecl();
2522 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2523 DPattern->getCanonicalDecl()->getGlobalID(),
2524 IsKeyDecl);
2525
2526 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2527 // Merge with any existing definition.
2528 // FIXME: This is duplicated in several places. Refactor.
2529 auto *ExistingClass =
2530 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2531 if (auto *DDD = DClass->DefinitionData) {
2532 if (ExistingClass->DefinitionData) {
2533 MergeDefinitionData(ExistingClass, std::move(*DDD));
2534 } else {
2535 ExistingClass->DefinitionData = DClass->DefinitionData;
2536 // We may have skipped this before because we thought that DClass
2537 // was the canonical declaration.
2538 Reader.PendingDefinitions.insert(DClass);
2539 }
2540 }
2541 DClass->DefinitionData = ExistingClass->DefinitionData;
2542
2543 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2544 Result);
2545 }
2546 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2547 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2548 Result);
2549 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2550 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2551 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2552 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2553 Result);
2554 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2554)
;
2555}
2556
2557/// Attempts to merge the given declaration (D) with another declaration
2558/// of the same entity.
2559template<typename T>
2560void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2561 RedeclarableResult &Redecl,
2562 DeclID TemplatePatternID) {
2563 auto *D = static_cast<T *>(DBase);
2564 T *ExistingCanon = Existing->getCanonicalDecl();
2565 T *DCanon = D->getCanonicalDecl();
2566 if (ExistingCanon != DCanon) {
2567 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2568, __PRETTY_FUNCTION__))
2568 "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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2568, __PRETTY_FUNCTION__))
;
2569
2570 // Have our redeclaration link point back at the canonical declaration
2571 // of the existing declaration, so that this declaration has the
2572 // appropriate canonical declaration.
2573 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2574 D->First = ExistingCanon;
2575 ExistingCanon->Used |= D->Used;
2576 D->Used = false;
2577
2578 // When we merge a namespace, update its pointer to the first namespace.
2579 // We cannot have loaded any redeclarations of this declaration yet, so
2580 // there's nothing else that needs to be updated.
2581 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2582 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2583 assert_cast<NamespaceDecl*>(ExistingCanon));
2584
2585 // When we merge a template, merge its pattern.
2586 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2587 mergeTemplatePattern(
2588 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2589 TemplatePatternID, Redecl.isKeyDecl());
2590
2591 // If this declaration is a key declaration, make a note of that.
2592 if (Redecl.isKeyDecl())
2593 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2594 }
2595}
2596
2597/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2598/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2599/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2600/// that some types are mergeable during deserialization, otherwise name
2601/// lookup fails. This is the case for EnumConstantDecl.
2602static bool allowODRLikeMergeInC(NamedDecl *ND) {
2603 if (!ND)
2604 return false;
2605 // TODO: implement merge for other necessary decls.
2606 if (isa<EnumConstantDecl>(ND))
2607 return true;
2608 return false;
2609}
2610
2611/// Attempts to merge LifetimeExtendedTemporaryDecl with
2612/// identical class definitions from two different modules.
2613void ASTDeclReader::mergeMergeable(LifetimeExtendedTemporaryDecl *D) {
2614 // If modules are not available, there is no reason to perform this merge.
2615 if (!Reader.getContext().getLangOpts().Modules)
2616 return;
2617
2618 LifetimeExtendedTemporaryDecl *LETDecl = D;
2619
2620 LifetimeExtendedTemporaryDecl *&LookupResult =
2621 Reader.LETemporaryForMerging[std::make_pair(
2622 LETDecl->getExtendingDecl(), LETDecl->getManglingNumber())];
2623 if (LookupResult)
2624 Reader.getContext().setPrimaryMergedDecl(LETDecl,
2625 LookupResult->getCanonicalDecl());
2626 else
2627 LookupResult = LETDecl;
2628}
2629
2630/// Attempts to merge the given declaration (D) with another declaration
2631/// of the same entity, for the case where the entity is not actually
2632/// redeclarable. This happens, for instance, when merging the fields of
2633/// identical class definitions from two different modules.
2634template<typename T>
2635void ASTDeclReader::mergeMergeable(Mergeable<T> *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 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2641 // Note that C identically-named things in different translation units are
2642 // not redeclarations, but may still have compatible types, where ODR-like
2643 // semantics may apply.
2644 if (!Reader.getContext().getLangOpts().CPlusPlus &&
2645 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2646 return;
2647
2648 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2649 if (T *Existing = ExistingRes)
2650 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2651 Existing->getCanonicalDecl());
2652}
2653
2654void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2655 VisitDecl(D);
2656 unsigned NumVars = D->varlist_size();
2657 SmallVector<Expr *, 16> Vars;
2658 Vars.reserve(NumVars);
2659 for (unsigned i = 0; i != NumVars; ++i) {
2660 Vars.push_back(Record.readExpr());
2661 }
2662 D->setVars(Vars);
2663}
2664
2665void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2666 VisitDecl(D);
2667 unsigned NumVars = D->varlist_size();
2668 unsigned NumClauses = D->clauselist_size();
2669 SmallVector<Expr *, 16> Vars;
2670 Vars.reserve(NumVars);
2671 for (unsigned i = 0; i != NumVars; ++i) {
2672 Vars.push_back(Record.readExpr());
2673 }
2674 D->setVars(Vars);
2675 SmallVector<OMPClause *, 8> Clauses;
2676 Clauses.reserve(NumClauses);
2677 for (unsigned I = 0; I != NumClauses; ++I)
2678 Clauses.push_back(Record.readOMPClause());
2679 D->setClauses(Clauses);
2680}
2681
2682void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
2683 VisitDecl(D);
2684 unsigned NumClauses = D->clauselist_size();
2685 SmallVector<OMPClause *, 8> Clauses;
2686 Clauses.reserve(NumClauses);
2687 for (unsigned I = 0; I != NumClauses; ++I)
2688 Clauses.push_back(Record.readOMPClause());
2689 D->setClauses(Clauses);
2690}
2691
2692void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2693 VisitValueDecl(D);
2694 D->setLocation(readSourceLocation());
2695 Expr *In = Record.readExpr();
2696 Expr *Out = Record.readExpr();
2697 D->setCombinerData(In, Out);
2698 Expr *Combiner = Record.readExpr();
2699 D->setCombiner(Combiner);
2700 Expr *Orig = Record.readExpr();
2701 Expr *Priv = Record.readExpr();
2702 D->setInitializerData(Orig, Priv);
2703 Expr *Init = Record.readExpr();
2704 auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2705 D->setInitializer(Init, IK);
2706 D->PrevDeclInScope = readDeclID();
2707}
2708
2709void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2710 VisitValueDecl(D);
2711 D->setLocation(readSourceLocation());
2712 Expr *MapperVarRefE = Record.readExpr();
2713 D->setMapperVarRef(MapperVarRefE);
2714 D->VarName = Record.readDeclarationName();
2715 D->PrevDeclInScope = readDeclID();
2716 unsigned NumClauses = D->clauselist_size();
2717 SmallVector<OMPClause *, 8> Clauses;
2718 Clauses.reserve(NumClauses);
2719 for (unsigned I = 0; I != NumClauses; ++I)
2720 Clauses.push_back(Record.readOMPClause());
2721 D->setClauses(Clauses);
2722}
2723
2724void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2725 VisitVarDecl(D);
2726}
2727
2728//===----------------------------------------------------------------------===//
2729// Attribute Reading
2730//===----------------------------------------------------------------------===//
2731
2732namespace {
2733class AttrReader {
2734 ASTRecordReader &Reader;
2735
2736public:
2737 AttrReader(ASTRecordReader &Reader) : Reader(Reader) {}
2738
2739 uint64_t readInt() {
2740 return Reader.readInt();
2741 }
2742
2743 SourceRange readSourceRange() {
2744 return Reader.readSourceRange();
2745 }
2746
2747 SourceLocation readSourceLocation() {
2748 return Reader.readSourceLocation();
2749 }
2750
2751 Expr *readExpr() { return Reader.readExpr(); }
2752
2753 std::string readString() {
2754 return Reader.readString();
2755 }
2756
2757 TypeSourceInfo *readTypeSourceInfo() {
2758 return Reader.readTypeSourceInfo();
2759 }
2760
2761 IdentifierInfo *readIdentifier() {
2762 return Reader.readIdentifier();
2763 }
2764
2765 VersionTuple readVersionTuple() {
2766 return Reader.readVersionTuple();
2767 }
2768
2769 OMPTraitInfo *readOMPTraitInfo() { return Reader.readOMPTraitInfo(); }
2770
2771 template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2772 return Reader.GetLocalDeclAs<T>(LocalID);
2773 }
2774};
2775}
2776
2777Attr *ASTRecordReader::readAttr() {
2778 AttrReader Record(*this);
2779 auto V = Record.readInt();
2780 if (!V)
2781 return nullptr;
2782
2783 Attr *New = nullptr;
2784 // Kind is stored as a 1-based integer because 0 is used to indicate a null
2785 // Attr pointer.
2786 auto Kind = static_cast<attr::Kind>(V - 1);
2787 ASTContext &Context = getContext();
2788
2789 IdentifierInfo *AttrName = Record.readIdentifier();
2790 IdentifierInfo *ScopeName = Record.readIdentifier();
2791 SourceRange AttrRange = Record.readSourceRange();
2792 SourceLocation ScopeLoc = Record.readSourceLocation();
2793 unsigned ParsedKind = Record.readInt();
2794 unsigned Syntax = Record.readInt();
2795 unsigned SpellingIndex = Record.readInt();
2796
2797 AttributeCommonInfo Info(AttrName, ScopeName, AttrRange, ScopeLoc,
2798 AttributeCommonInfo::Kind(ParsedKind),
2799 AttributeCommonInfo::Syntax(Syntax), SpellingIndex);
2800
2801#include "clang/Serialization/AttrPCHRead.inc"
2802
2803 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2803, __PRETTY_FUNCTION__))
;
2804 return New;
2805}
2806
2807/// Reads attributes from the current stream position.
2808void ASTRecordReader::readAttributes(AttrVec &Attrs) {
2809 for (unsigned I = 0, E = readInt(); I != E; ++I)
2810 Attrs.push_back(readAttr());
2811}
2812
2813//===----------------------------------------------------------------------===//
2814// ASTReader Implementation
2815//===----------------------------------------------------------------------===//
2816
2817/// Note that we have loaded the declaration with the given
2818/// Index.
2819///
2820/// This routine notes that this declaration has already been loaded,
2821/// so that future GetDecl calls will return this declaration rather
2822/// than trying to load a new declaration.
2823inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2824 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2824, __PRETTY_FUNCTION__))
;
2825 DeclsLoaded[Index] = D;
2826}
2827
2828/// Determine whether the consumer will be interested in seeing
2829/// this declaration (via HandleTopLevelDecl).
2830///
2831/// This routine should return true for anything that might affect
2832/// code generation, e.g., inline function definitions, Objective-C
2833/// declarations with metadata, etc.
2834static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2835 // An ObjCMethodDecl is never considered as "interesting" because its
2836 // implementation container always is.
2837
2838 // An ImportDecl or VarDecl imported from a module map module will get
2839 // emitted when we import the relevant module.
2840 if (isPartOfPerModuleInitializer(D)) {
2841 auto *M = D->getImportedOwningModule();
2842 if (M && M->Kind == Module::ModuleMapModule &&
2843 Ctx.DeclMustBeEmitted(D))
2844 return false;
2845 }
2846
2847 if (isa<FileScopeAsmDecl>(D) ||
2848 isa<ObjCProtocolDecl>(D) ||
2849 isa<ObjCImplDecl>(D) ||
2850 isa<ImportDecl>(D) ||
2851 isa<PragmaCommentDecl>(D) ||
2852 isa<PragmaDetectMismatchDecl>(D))
2853 return true;
2854 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2855 isa<OMPDeclareMapperDecl>(D) || isa<OMPAllocateDecl>(D) ||
2856 isa<OMPRequiresDecl>(D))
2857 return !D->getDeclContext()->isFunctionOrMethod();
2858 if (const auto *Var = dyn_cast<VarDecl>(D))
2859 return Var->isFileVarDecl() &&
2860 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2861 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2862 if (const auto *Func = dyn_cast<FunctionDecl>(D))
2863 return Func->doesThisDeclarationHaveABody() || HasBody;
2864
2865 if (auto *ES = D->getASTContext().getExternalSource())
2866 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2867 return true;
2868
2869 return false;
2870}
2871
2872/// Get the correct cursor and offset for loading a declaration.
2873ASTReader::RecordLocation
2874ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2875 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2876 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2876, __PRETTY_FUNCTION__))
;
2877 ModuleFile *M = I->second;
2878 const DeclOffset &DOffs =
2879 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2880 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2881 return RecordLocation(M, DOffs.getBitOffset(M->DeclsBlockStartOffset));
2882}
2883
2884ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2885 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2886
2887 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2887, __PRETTY_FUNCTION__))
;
2888 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2889}
2890
2891uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint64_t LocalOffset) {
2892 return LocalOffset + M.GlobalBitOffset;
2893}
2894
2895static bool isSameTemplateParameterList(const ASTContext &C,
2896 const TemplateParameterList *X,
2897 const TemplateParameterList *Y);
2898
2899/// Determine whether two template parameters are similar enough
2900/// that they may be used in declarations of the same template.
2901static bool isSameTemplateParameter(const NamedDecl *X,
2902 const NamedDecl *Y) {
2903 if (X->getKind() != Y->getKind())
2904 return false;
2905
2906 if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2907 const auto *TY = cast<TemplateTypeParmDecl>(Y);
2908 if (TX->isParameterPack() != TY->isParameterPack())
2909 return false;
2910 if (TX->hasTypeConstraint() != TY->hasTypeConstraint())
2911 return false;
2912 const TypeConstraint *TXTC = TX->getTypeConstraint();
2913 const TypeConstraint *TYTC = TY->getTypeConstraint();
2914 if (!TXTC != !TYTC)
2915 return false;
2916 if (TXTC && TYTC) {
2917 if (TXTC->getNamedConcept() != TYTC->getNamedConcept())
2918 return false;
2919 if (TXTC->hasExplicitTemplateArgs() != TYTC->hasExplicitTemplateArgs())
2920 return false;
2921 if (TXTC->hasExplicitTemplateArgs()) {
2922 const auto *TXTCArgs = TXTC->getTemplateArgsAsWritten();
2923 const auto *TYTCArgs = TYTC->getTemplateArgsAsWritten();
2924 if (TXTCArgs->NumTemplateArgs != TYTCArgs->NumTemplateArgs)
2925 return false;
2926 llvm::FoldingSetNodeID XID, YID;
2927 for (const auto &ArgLoc : TXTCArgs->arguments())
2928 ArgLoc.getArgument().Profile(XID, X->getASTContext());
2929 for (const auto &ArgLoc : TYTCArgs->arguments())
2930 ArgLoc.getArgument().Profile(YID, Y->getASTContext());
2931 if (XID != YID)
2932 return false;
2933 }
2934 }
2935 return true;
2936 }
2937
2938 if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2939 const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2940 return TX->isParameterPack() == TY->isParameterPack() &&
2941 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2942 }
2943
2944 const auto *TX = cast<TemplateTemplateParmDecl>(X);
2945 const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2946 return TX->isParameterPack() == TY->isParameterPack() &&
2947 isSameTemplateParameterList(TX->getASTContext(),
2948 TX->getTemplateParameters(),
2949 TY->getTemplateParameters());
2950}
2951
2952static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2953 if (auto *NS = X->getAsNamespace())
2954 return NS;
2955 if (auto *NAS = X->getAsNamespaceAlias())
2956 return NAS->getNamespace();
2957 return nullptr;
2958}
2959
2960static bool isSameQualifier(const NestedNameSpecifier *X,
2961 const NestedNameSpecifier *Y) {
2962 if (auto *NSX = getNamespace(X)) {
2963 auto *NSY = getNamespace(Y);
2964 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2965 return false;
2966 } else if (X->getKind() != Y->getKind())
2967 return false;
2968
2969 // FIXME: For namespaces and types, we're permitted to check that the entity
2970 // is named via the same tokens. We should probably do so.
2971 switch (X->getKind()) {
2972 case NestedNameSpecifier::Identifier:
2973 if (X->getAsIdentifier() != Y->getAsIdentifier())
2974 return false;
2975 break;
2976 case NestedNameSpecifier::Namespace:
2977 case NestedNameSpecifier::NamespaceAlias:
2978 // We've already checked that we named the same namespace.
2979 break;
2980 case NestedNameSpecifier::TypeSpec:
2981 case NestedNameSpecifier::TypeSpecWithTemplate:
2982 if (X->getAsType()->getCanonicalTypeInternal() !=
2983 Y->getAsType()->getCanonicalTypeInternal())
2984 return false;
2985 break;
2986 case NestedNameSpecifier::Global:
2987 case NestedNameSpecifier::Super:
2988 return true;
2989 }
2990
2991 // Recurse into earlier portion of NNS, if any.
2992 auto *PX = X->getPrefix();
2993 auto *PY = Y->getPrefix();
2994 if (PX && PY)
2995 return isSameQualifier(PX, PY);
2996 return !PX && !PY;
2997}
2998
2999/// Determine whether two template parameter lists are similar enough
3000/// that they may be used in declarations of the same template.
3001static bool isSameTemplateParameterList(const ASTContext &C,
3002 const TemplateParameterList *X,
3003 const TemplateParameterList *Y) {
3004 if (X->size() != Y->size())
3005 return false;
3006
3007 for (unsigned I = 0, N = X->size(); I != N; ++I)
3008 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
3009 return false;
3010
3011 const Expr *XRC = X->getRequiresClause();
3012 const Expr *YRC = Y->getRequiresClause();
3013 if (!XRC != !YRC)
3014 return false;
3015 if (XRC) {
3016 llvm::FoldingSetNodeID XRCID, YRCID;
3017 XRC->Profile(XRCID, C, /*Canonical=*/true);
3018 YRC->Profile(YRCID, C, /*Canonical=*/true);
3019 if (XRCID != YRCID)
3020 return false;
3021 }
3022
3023 return true;
3024}
3025
3026/// Determine whether the attributes we can overload on are identical for A and
3027/// B. Will ignore any overloadable attrs represented in the type of A and B.
3028static bool hasSameOverloadableAttrs(const FunctionDecl *A,
3029 const FunctionDecl *B) {
3030 // Note that pass_object_size attributes are represented in the function's
3031 // ExtParameterInfo, so we don't need to check them here.
3032
3033 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
3034 auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
3035 auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
3036
3037 for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
3038 Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
3039 Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
3040
3041 // Return false if the number of enable_if attributes is different.
3042 if (!Cand1A || !Cand2A)
3043 return false;
3044
3045 Cand1ID.clear();
3046 Cand2ID.clear();
3047
3048 (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
3049 (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
3050
3051 // Return false if any of the enable_if expressions of A and B are
3052 // different.
3053 if (Cand1ID != Cand2ID)
3054 return false;
3055 }
3056 return true;
3057}
3058
3059/// Determine whether the two declarations refer to the same entity.pr
3060static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
3061 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3061, __PRETTY_FUNCTION__))
;
3062
3063 if (X == Y)
3064 return true;
3065
3066 // Must be in the same context.
3067 //
3068 // Note that we can't use DeclContext::Equals here, because the DeclContexts
3069 // could be two different declarations of the same function. (We will fix the
3070 // semantic DC to refer to the primary definition after merging.)
3071 if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
3072 cast<Decl>(Y->getDeclContext()->getRedeclContext())))
3073 return false;
3074
3075 // Two typedefs refer to the same entity if they have the same underlying
3076 // type.
3077 if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
3078 if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
3079 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
3080 TypedefY->getUnderlyingType());
3081
3082 // Must have the same kind.
3083 if (X->getKind() != Y->getKind())
3084 return false;
3085
3086 // Objective-C classes and protocols with the same name always match.
3087 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
3088 return true;
3089
3090 if (isa<ClassTemplateSpecializationDecl>(X)) {
3091 // No need to handle these here: we merge them when adding them to the
3092 // template.
3093 return false;
3094 }
3095
3096 // Compatible tags match.
3097 if (const auto *TagX = dyn_cast<TagDecl>(X)) {
3098 const auto *TagY = cast<TagDecl>(Y);
3099 return (TagX->getTagKind() == TagY->getTagKind()) ||
3100 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
3101 TagX->getTagKind() == TTK_Interface) &&
3102 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
3103 TagY->getTagKind() == TTK_Interface));
3104 }
3105
3106 // Functions with the same type and linkage match.
3107 // FIXME: This needs to cope with merging of prototyped/non-prototyped
3108 // functions, etc.
3109 if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
3110 const auto *FuncY = cast<FunctionDecl>(Y);
3111 if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
3112 const auto *CtorY = cast<CXXConstructorDecl>(Y);
3113 if (CtorX->getInheritedConstructor() &&
3114 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
3115 CtorY->getInheritedConstructor().getConstructor()))
3116 return false;
3117 }
3118
3119 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3120 return false;
3121
3122 // Multiversioned functions with different feature strings are represented
3123 // as separate declarations.
3124 if (FuncX->isMultiVersion()) {
3125 const auto *TAX = FuncX->getAttr<TargetAttr>();
3126 const auto *TAY = FuncY->getAttr<TargetAttr>();
3127 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3127, __PRETTY_FUNCTION__))
;
3128
3129 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3130 return false;
3131 }
3132
3133 ASTContext &C = FuncX->getASTContext();
3134
3135 const Expr *XRC = FuncX->getTrailingRequiresClause();
3136 const Expr *YRC = FuncY->getTrailingRequiresClause();
3137 if (!XRC != !YRC)
3138 return false;
3139 if (XRC) {
3140 llvm::FoldingSetNodeID XRCID, YRCID;
3141 XRC->Profile(XRCID, C, /*Canonical=*/true);
3142 YRC->Profile(YRCID, C, /*Canonical=*/true);
3143 if (XRCID != YRCID)
3144 return false;
3145 }
3146
3147 auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3148 // Map to the first declaration that we've already merged into this one.
3149 // The TSI of redeclarations might not match (due to calling conventions
3150 // being inherited onto the type but not the TSI), but the TSI type of
3151 // the first declaration of the function should match across modules.
3152 FD = FD->getCanonicalDecl();
3153 return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3154 : FD->getType();
3155 };
3156 QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3157 if (!C.hasSameType(XT, YT)) {
3158 // We can get functions with different types on the redecl chain in C++17
3159 // if they have differing exception specifications and at least one of
3160 // the excpetion specs is unresolved.
3161 auto *XFPT = XT->getAs<FunctionProtoType>();
3162 auto *YFPT = YT->getAs<FunctionProtoType>();
3163 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3164 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3165 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
3166 C.hasSameFunctionTypeIgnoringExceptionSpec(XT, YT))
3167 return true;
3168 return false;
3169 }
3170
3171 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3172 hasSameOverloadableAttrs(FuncX, FuncY);
3173 }
3174
3175 // Variables with the same type and linkage match.
3176 if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3177 const auto *VarY = cast<VarDecl>(Y);
3178 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3179 ASTContext &C = VarX->getASTContext();
3180 if (C.hasSameType(VarX->getType(), VarY->getType()))
3181 return true;
3182
3183 // We can get decls with different types on the redecl chain. Eg.
3184 // template <typename T> struct S { static T Var[]; }; // #1
3185 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3186 // Only? happens when completing an incomplete array type. In this case
3187 // when comparing #1 and #2 we should go through their element type.
3188 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3189 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3190 if (!VarXTy || !VarYTy)
3191 return false;
3192 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3193 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3194 }
3195 return false;
3196 }
3197
3198 // Namespaces with the same name and inlinedness match.
3199 if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3200 const auto *NamespaceY = cast<NamespaceDecl>(Y);
3201 return NamespaceX->isInline() == NamespaceY->isInline();
3202 }
3203
3204 // Identical template names and kinds match if their template parameter lists
3205 // and patterns match.
3206 if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3207 const auto *TemplateY = cast<TemplateDecl>(Y);
3208 return isSameEntity(TemplateX->getTemplatedDecl(),
3209 TemplateY->getTemplatedDecl()) &&
3210 isSameTemplateParameterList(TemplateX->getASTContext(),
3211 TemplateX->getTemplateParameters(),
3212 TemplateY->getTemplateParameters());
3213 }
3214
3215 // Fields with the same name and the same type match.
3216 if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3217 const auto *FDY = cast<FieldDecl>(Y);
3218 // FIXME: Also check the bitwidth is odr-equivalent, if any.
3219 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3220 }
3221
3222 // Indirect fields with the same target field match.
3223 if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3224 const auto *IFDY = cast<IndirectFieldDecl>(Y);
3225 return IFDX->getAnonField()->getCanonicalDecl() ==
3226 IFDY->getAnonField()->getCanonicalDecl();
3227 }
3228
3229 // Enumerators with the same name match.
3230 if (isa<EnumConstantDecl>(X))
3231 // FIXME: Also check the value is odr-equivalent.
3232 return true;
3233
3234 // Using shadow declarations with the same target match.
3235 if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3236 const auto *USY = cast<UsingShadowDecl>(Y);
3237 return USX->getTargetDecl() == USY->getTargetDecl();
3238 }
3239
3240 // Using declarations with the same qualifier match. (We already know that
3241 // the name matches.)
3242 if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3243 const auto *UY = cast<UsingDecl>(Y);
3244 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3245 UX->hasTypename() == UY->hasTypename() &&
3246 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3247 }
3248 if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3249 const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3250 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3251 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3252 }
3253 if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3254 return isSameQualifier(
3255 UX->getQualifier(),
3256 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3257
3258 // Namespace alias definitions with the same target match.
3259 if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3260 const auto *NAY = cast<NamespaceAliasDecl>(Y);
3261 return NAX->getNamespace()->Equals(NAY->getNamespace());
3262 }
3263
3264 return false;
3265}
3266
3267/// Find the context in which we should search for previous declarations when
3268/// looking for declarations to merge.
3269DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3270 DeclContext *DC) {
3271 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3272 return ND->getOriginalNamespace();
3273
3274 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3275 // Try to dig out the definition.
3276 auto *DD = RD->DefinitionData;
3277 if (!DD)
3278 DD = RD->getCanonicalDecl()->DefinitionData;
3279
3280 // If there's no definition yet, then DC's definition is added by an update
3281 // record, but we've not yet loaded that update record. In this case, we
3282 // commit to DC being the canonical definition now, and will fix this when
3283 // we load the update record.
3284 if (!DD) {
3285 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3286 RD->setCompleteDefinition(true);
3287 RD->DefinitionData = DD;
3288 RD->getCanonicalDecl()->DefinitionData = DD;
3289
3290 // Track that we did this horrible thing so that we can fix it later.
3291 Reader.PendingFakeDefinitionData.insert(
3292 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3293 }
3294
3295 return DD->Definition;
3296 }
3297
3298 if (auto *ED = dyn_cast<EnumDecl>(DC))
3299 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3300 : nullptr;
3301
3302 // We can see the TU here only if we have no Sema object. In that case,
3303 // there's no TU scope to look in, so using the DC alone is sufficient.
3304 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3305 return TU;
3306
3307 return nullptr;
3308}
3309
3310ASTDeclReader::FindExistingResult::~FindExistingResult() {
3311 // Record that we had a typedef name for linkage whether or not we merge
3312 // with that declaration.
3313 if (TypedefNameForLinkage) {
3314 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3315 Reader.ImportedTypedefNamesForLinkage.insert(
3316 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3317 return;
3318 }
3319
3320 if (!AddResult || Existing)
3321 return;
3322
3323 DeclarationName Name = New->getDeclName();
3324 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3325 if (needsAnonymousDeclarationNumber(New)) {
3326 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3327 AnonymousDeclNumber, New);
3328 } else if (DC->isTranslationUnit() &&
3329 !Reader.getContext().getLangOpts().CPlusPlus) {
3330 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3331 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3332 .push_back(New);
3333 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3334 // Add the declaration to its redeclaration context so later merging
3335 // lookups will find it.
3336 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3337 }
3338}
3339
3340/// Find the declaration that should be merged into, given the declaration found
3341/// by name lookup. If we're merging an anonymous declaration within a typedef,
3342/// we need a matching typedef, and we merge with the type inside it.
3343static NamedDecl *getDeclForMerging(NamedDecl *Found,
3344 bool IsTypedefNameForLinkage) {
3345 if (!IsTypedefNameForLinkage)
3346 return Found;
3347
3348 // If we found a typedef declaration that gives a name to some other
3349 // declaration, then we want that inner declaration. Declarations from
3350 // AST files are handled via ImportedTypedefNamesForLinkage.
3351 if (Found->isFromASTFile())
3352 return nullptr;
3353
3354 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3355 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3356
3357 return nullptr;
3358}
3359
3360/// Find the declaration to use to populate the anonymous declaration table
3361/// for the given lexical DeclContext. We only care about finding local
3362/// definitions of the context; we'll merge imported ones as we go.
3363DeclContext *
3364ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3365 // For classes, we track the definition as we merge.
3366 if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3367 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3368 return DD ? DD->Definition : nullptr;
3369 }
3370
3371 // For anything else, walk its merged redeclarations looking for a definition.
3372 // Note that we can't just call getDefinition here because the redeclaration
3373 // chain isn't wired up.
3374 for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3375 if (auto *FD = dyn_cast<FunctionDecl>(D))
3376 if (FD->isThisDeclarationADefinition())
3377 return FD;
3378 if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3379 if (MD->isThisDeclarationADefinition())
3380 return MD;
3381 }
3382
3383 // No merged definition yet.
3384 return nullptr;
3385}
3386
3387NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3388 DeclContext *DC,
3389 unsigned Index) {
3390 // If the lexical context has been merged, look into the now-canonical
3391 // definition.
3392 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3393
3394 // If we've seen this before, return the canonical declaration.
3395 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3396 if (Index < Previous.size() && Previous[Index])
3397 return Previous[Index];
3398
3399 // If this is the first time, but we have parsed a declaration of the context,
3400 // build the anonymous declaration list from the parsed declaration.
3401 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3402 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3403 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3404 if (Previous.size() == Number)
3405 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3406 else
3407 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3408 });
3409 }
3410
3411 return Index < Previous.size() ? Previous[Index] : nullptr;
3412}
3413
3414void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3415 DeclContext *DC, unsigned Index,
3416 NamedDecl *D) {
3417 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3418
3419 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3420 if (Index >= Previous.size())
3421 Previous.resize(Index + 1);
3422 if (!Previous[Index])
3423 Previous[Index] = D;
3424}
3425
3426ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3427 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3428 : D->getDeclName();
3429
3430 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3431 // Don't bother trying to find unnamed declarations that are in
3432 // unmergeable contexts.
3433 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3434 AnonymousDeclNumber, TypedefNameForLinkage);
3435 Result.suppress();
3436 return Result;
3437 }
3438
3439 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3440 if (TypedefNameForLinkage) {
3441 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3442 std::make_pair(DC, TypedefNameForLinkage));
3443 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3444 if (isSameEntity(It->second, D))
3445 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3446 TypedefNameForLinkage);
3447 // Go on to check in other places in case an existing typedef name
3448 // was not imported.
3449 }
3450
3451 if (needsAnonymousDeclarationNumber(D)) {
3452 // This is an anonymous declaration that we may need to merge. Look it up
3453 // in its context by number.
3454 if (auto *Existing = getAnonymousDeclForMerging(
3455 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3456 if (isSameEntity(Existing, D))
3457 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3458 TypedefNameForLinkage);
3459 } else if (DC->isTranslationUnit() &&
3460 !Reader.getContext().getLangOpts().CPlusPlus) {
3461 IdentifierResolver &IdResolver = Reader.getIdResolver();
3462
3463 // Temporarily consider the identifier to be up-to-date. We don't want to
3464 // cause additional lookups here.
3465 class UpToDateIdentifierRAII {
3466 IdentifierInfo *II;
3467 bool WasOutToDate = false;
3468
3469 public:
3470 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3471 if (II) {
3472 WasOutToDate = II->isOutOfDate();
3473 if (WasOutToDate)
3474 II->setOutOfDate(false);
3475 }
3476 }
3477
3478 ~UpToDateIdentifierRAII() {
3479 if (WasOutToDate)
3480 II->setOutOfDate(true);
3481 }
3482 } UpToDate(Name.getAsIdentifierInfo());
3483
3484 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3485 IEnd = IdResolver.end();
3486 I != IEnd; ++I) {
3487 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3488 if (isSameEntity(Existing, D))
3489 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3490 TypedefNameForLinkage);
3491 }
3492 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3493 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3494 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3495 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3496 if (isSameEntity(Existing, D))
3497 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3498 TypedefNameForLinkage);
3499 }
3500 } else {
3501 // Not in a mergeable context.
3502 return FindExistingResult(Reader);
3503 }
3504
3505 // If this declaration is from a merged context, make a note that we need to
3506 // check that the canonical definition of that context contains the decl.
3507 //
3508 // FIXME: We should do something similar if we merge two definitions of the
3509 // same template specialization into the same CXXRecordDecl.
3510 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3511 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3512 MergedDCIt->second == D->getDeclContext())
3513 Reader.PendingOdrMergeChecks.push_back(D);
3514
3515 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3516 AnonymousDeclNumber, TypedefNameForLinkage);
3517}
3518
3519template<typename DeclT>
3520Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3521 return D->RedeclLink.getLatestNotUpdated();
3522}
3523
3524Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3525 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3525)
;
3526}
3527
3528Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3529 assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3529, __PRETTY_FUNCTION__))
;
3530
3531 switch (D->getKind()) {
3532#define ABSTRACT_DECL(TYPE)
3533#define DECL(TYPE, BASE) \
3534 case Decl::TYPE: \
3535 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3536#include "clang/AST/DeclNodes.inc"
3537 }
3538 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3538)
;
3539}
3540
3541Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3542 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3543}
3544
3545template<typename DeclT>
3546void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3547 Redeclarable<DeclT> *D,
3548 Decl *Previous, Decl *Canon) {
3549 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3550 D->First = cast<DeclT>(Previous)->First;
3551}
3552
3553namespace clang {
3554
3555template<>
3556void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3557 Redeclarable<VarDecl> *D,
3558 Decl *Previous, Decl *Canon) {
3559 auto *VD = static_cast<VarDecl *>(D);
3560 auto *PrevVD = cast<VarDecl>(Previous);
3561 D->RedeclLink.setPrevious(PrevVD);
3562 D->First = PrevVD->First;
3563
3564 // We should keep at most one definition on the chain.
3565 // FIXME: Cache the definition once we've found it. Building a chain with
3566 // N definitions currently takes O(N^2) time here.
3567 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3568 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3569 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3570 Reader.mergeDefinitionVisibility(CurD, VD);
3571 VD->demoteThisDefinitionToDeclaration();
3572 break;
3573 }
3574 }
3575 }
3576}
3577
3578static bool isUndeducedReturnType(QualType T) {
3579 auto *DT = T->getContainedDeducedType();
3580 return DT && !DT->isDeduced();
3581}
3582
3583template<>
3584void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3585 Redeclarable<FunctionDecl> *D,
3586 Decl *Previous, Decl *Canon) {
3587 auto *FD = static_cast<FunctionDecl *>(D);
3588 auto *PrevFD = cast<FunctionDecl>(Previous);
3589
3590 FD->RedeclLink.setPrevious(PrevFD);
3591 FD->First = PrevFD->First;
3592
3593 // If the previous declaration is an inline function declaration, then this
3594 // declaration is too.
3595 if (PrevFD->isInlined() != FD->isInlined()) {
3596 // FIXME: [dcl.fct.spec]p4:
3597 // If a function with external linkage is declared inline in one
3598 // translation unit, it shall be declared inline in all translation
3599 // units in which it appears.
3600 //
3601 // Be careful of this case:
3602 //
3603 // module A:
3604 // template<typename T> struct X { void f(); };
3605 // template<typename T> inline void X<T>::f() {}
3606 //
3607 // module B instantiates the declaration of X<int>::f
3608 // module C instantiates the definition of X<int>::f
3609 //
3610 // If module B and C are merged, we do not have a violation of this rule.
3611 FD->setImplicitlyInline(true);
3612 }
3613
3614 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3615 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3616 if (FPT && PrevFPT) {
3617 // If we need to propagate an exception specification along the redecl
3618 // chain, make a note of that so that we can do so later.
3619 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3620 bool WasUnresolved =
3621 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3622 if (IsUnresolved != WasUnresolved)
3623 Reader.PendingExceptionSpecUpdates.insert(
3624 {Canon, IsUnresolved ? PrevFD : FD});
3625
3626 // If we need to propagate a deduced return type along the redecl chain,
3627 // make a note of that so that we can do it later.
3628 bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3629 bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3630 if (IsUndeduced != WasUndeduced)
3631 Reader.PendingDeducedTypeUpdates.insert(
3632 {cast<FunctionDecl>(Canon),
3633 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3634 }
3635}
3636
3637} // namespace clang
3638
3639void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3640 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3640)
;
3641}
3642
3643/// Inherit the default template argument from \p From to \p To. Returns
3644/// \c false if there is no default template for \p From.
3645template <typename ParmDecl>
3646static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3647 Decl *ToD) {
3648 auto *To = cast<ParmDecl>(ToD);
3649 if (!From->hasDefaultArgument())
3650 return false;
3651 To->setInheritedDefaultArgument(Context, From);
3652 return true;
3653}
3654
3655static void inheritDefaultTemplateArguments(ASTContext &Context,
3656 TemplateDecl *From,
3657 TemplateDecl *To) {
3658 auto *FromTP = From->getTemplateParameters();
3659 auto *ToTP = To->getTemplateParameters();
3660 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3660, __PRETTY_FUNCTION__))
;
3661
3662 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3663 NamedDecl *FromParam = FromTP->getParam(I);
3664 NamedDecl *ToParam = ToTP->getParam(I);
3665
3666 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3667 inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3668 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3669 inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3670 else
3671 inheritDefaultTemplateArgument(
3672 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3673 }
3674}
3675
3676void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3677 Decl *Previous, Decl *Canon) {
3678 assert(D && Previous)((D && Previous) ? static_cast<void> (0) : __assert_fail
("D && Previous", "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3678, __PRETTY_FUNCTION__))
;
3679
3680 switch (D->getKind()) {
3681#define ABSTRACT_DECL(TYPE)
3682#define DECL(TYPE, BASE) \
3683 case Decl::TYPE: \
3684 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3685 break;
3686#include "clang/AST/DeclNodes.inc"
3687 }
3688
3689 // If the declaration was visible in one module, a redeclaration of it in
3690 // another module remains visible even if it wouldn't be visible by itself.
3691 //
3692 // FIXME: In this case, the declaration should only be visible if a module
3693 // that makes it visible has been imported.
3694 D->IdentifierNamespace |=
3695 Previous->IdentifierNamespace &
3696 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3697
3698 // If the declaration declares a template, it may inherit default arguments
3699 // from the previous declaration.
3700 if (auto *TD = dyn_cast<TemplateDecl>(D))
3701 inheritDefaultTemplateArguments(Reader.getContext(),
3702 cast<TemplateDecl>(Previous), TD);
3703}
3704
3705template<typename DeclT>
3706void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3707 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3708}
3709
3710void ASTDeclReader::attachLatestDeclImpl(...) {
3711 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3711)
;
3712}
3713
3714void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3715 assert(D && Latest)((D && Latest) ? static_cast<void> (0) : __assert_fail
("D && Latest", "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3715, __PRETTY_FUNCTION__))
;
3716
3717 switch (D->getKind()) {
3718#define ABSTRACT_DECL(TYPE)
3719#define DECL(TYPE, BASE) \
3720 case Decl::TYPE: \
3721 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3722 break;
3723#include "clang/AST/DeclNodes.inc"
3724 }
3725}
3726
3727template<typename DeclT>
3728void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3729 D->RedeclLink.markIncomplete();
3730}
3731
3732void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3733 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3733)
;
3734}
3735
3736void ASTReader::markIncompleteDeclChain(Decl *D) {
3737 switch (D->getKind()) {
3738#define ABSTRACT_DECL(TYPE)
3739#define DECL(TYPE, BASE) \
3740 case Decl::TYPE: \
3741 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3742 break;
3743#include "clang/AST/DeclNodes.inc"
3744 }
3745}
3746
3747/// Read the declaration at the given offset from the AST file.
3748Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3749 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3750 SourceLocation DeclLoc;
3751 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3752 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3753 // Keep track of where we are in the stream, then jump back there
3754 // after reading this declaration.
3755 SavedStreamPosition SavedPosition(DeclsCursor);
3756
3757 ReadingKindTracker ReadingKind(Read_Decl, *this);
3758
3759 // Note that we are loading a declaration record.
3760 Deserializing ADecl(this);
3761
3762 auto Fail = [](const char *what, llvm::Error &&Err) {
3763 llvm::report_fatal_error(Twine("ASTReader::readDeclRecord failed ") + what +
3764 ": " + toString(std::move(Err)));
3765 };
3766
3767 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(Loc.Offset))
3768 Fail("jumping", std::move(JumpFailed));
3769 ASTRecordReader Record(*this, *Loc.F);
3770 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3771 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3772 if (!MaybeCode)
3773 Fail("reading code", MaybeCode.takeError());
3774 unsigned Code = MaybeCode.get();
3775
3776 ASTContext &Context = getContext();
3777 Decl *D = nullptr;
3778 Expected<unsigned> MaybeDeclCode = Record.readRecord(DeclsCursor, Code);
3779 if (!MaybeDeclCode)
3780 llvm::report_fatal_error(
3781 "ASTReader::readDeclRecord failed reading decl code: " +
3782 toString(MaybeDeclCode.takeError()));
3783 switch ((DeclCode)MaybeDeclCode.get()) {
3784 case DECL_CONTEXT_LEXICAL:
3785 case DECL_CONTEXT_VISIBLE:
3786 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3786)
;
3787 case DECL_TYPEDEF:
3788 D = TypedefDecl::CreateDeserialized(Context, ID);
3789 break;
3790 case DECL_TYPEALIAS:
3791 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3792 break;
3793 case DECL_ENUM:
3794 D = EnumDecl::CreateDeserialized(Context, ID);
3795 break;
3796 case DECL_RECORD:
3797 D = RecordDecl::CreateDeserialized(Context, ID);
3798 break;
3799 case DECL_ENUM_CONSTANT:
3800 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3801 break;
3802 case DECL_FUNCTION:
3803 D = FunctionDecl::CreateDeserialized(Context, ID);
3804 break;
3805 case DECL_LINKAGE_SPEC:
3806 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3807 break;
3808 case DECL_EXPORT:
3809 D = ExportDecl::CreateDeserialized(Context, ID);
3810 break;
3811 case DECL_LABEL:
3812 D = LabelDecl::CreateDeserialized(Context, ID);
3813 break;
3814 case DECL_NAMESPACE:
3815 D = NamespaceDecl::CreateDeserialized(Context, ID);
3816 break;
3817 case DECL_NAMESPACE_ALIAS:
3818 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3819 break;
3820 case DECL_USING:
3821 D = UsingDecl::CreateDeserialized(Context, ID);
3822 break;
3823 case DECL_USING_PACK:
3824 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3825 break;
3826 case DECL_USING_SHADOW:
3827 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3828 break;
3829 case DECL_CONSTRUCTOR_USING_SHADOW:
3830 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3831 break;
3832 case DECL_USING_DIRECTIVE:
3833 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3834 break;
3835 case DECL_UNRESOLVED_USING_VALUE:
3836 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3837 break;
3838 case DECL_UNRESOLVED_USING_TYPENAME:
3839 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3840 break;
3841 case DECL_CXX_RECORD:
3842 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3843 break;
3844 case DECL_CXX_DEDUCTION_GUIDE:
3845 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3846 break;
3847 case DECL_CXX_METHOD:
3848 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3849 break;
3850 case DECL_CXX_CONSTRUCTOR:
3851 D = CXXConstructorDecl::CreateDeserialized(Context, ID, Record.readInt());
3852 break;
3853 case DECL_CXX_DESTRUCTOR:
3854 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3855 break;
3856 case DECL_CXX_CONVERSION:
3857 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3858 break;
3859 case DECL_ACCESS_SPEC:
3860 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3861 break;
3862 case DECL_FRIEND:
3863 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3864 break;
3865 case DECL_FRIEND_TEMPLATE:
3866 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3867 break;
3868 case DECL_CLASS_TEMPLATE:
3869 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3870 break;
3871 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3872 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3873 break;
3874 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3875 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3876 break;
3877 case DECL_VAR_TEMPLATE:
3878 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3879 break;
3880 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3881 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3882 break;
3883 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3884 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3885 break;
3886 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3887 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3888 break;
3889 case DECL_FUNCTION_TEMPLATE:
3890 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3891 break;
3892 case DECL_TEMPLATE_TYPE_PARM: {
3893 bool HasTypeConstraint = Record.readInt();
3894 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID,
3895 HasTypeConstraint);
3896 break;
3897 }
3898 case DECL_NON_TYPE_TEMPLATE_PARM: {
3899 bool HasTypeConstraint = Record.readInt();
3900 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3901 HasTypeConstraint);
3902 break;
3903 }
3904 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK: {
3905 bool HasTypeConstraint = Record.readInt();
3906 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3907 Record.readInt(),
3908 HasTypeConstraint);
3909 break;
3910 }
3911 case DECL_TEMPLATE_TEMPLATE_PARM:
3912 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3913 break;
3914 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3915 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3916 Record.readInt());
3917 break;
3918 case DECL_TYPE_ALIAS_TEMPLATE:
3919 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3920 break;
3921 case DECL_CONCEPT:
3922 D = ConceptDecl::CreateDeserialized(Context, ID);
3923 break;
3924 case DECL_REQUIRES_EXPR_BODY:
3925 D = RequiresExprBodyDecl::CreateDeserialized(Context, ID);
3926 break;
3927 case DECL_STATIC_ASSERT:
3928 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3929 break;
3930 case DECL_OBJC_METHOD:
3931 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3932 break;
3933 case DECL_OBJC_INTERFACE:
3934 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3935 break;
3936 case DECL_OBJC_IVAR:
3937 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3938 break;
3939 case DECL_OBJC_PROTOCOL:
3940 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3941 break;
3942 case DECL_OBJC_AT_DEFS_FIELD:
3943 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3944 break;
3945 case DECL_OBJC_CATEGORY:
3946 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3947 break;
3948 case DECL_OBJC_CATEGORY_IMPL:
3949 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3950 break;
3951 case DECL_OBJC_IMPLEMENTATION:
3952 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3953 break;
3954 case DECL_OBJC_COMPATIBLE_ALIAS:
3955 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3956 break;
3957 case DECL_OBJC_PROPERTY:
3958 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3959 break;
3960 case DECL_OBJC_PROPERTY_IMPL:
3961 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3962 break;
3963 case DECL_FIELD:
3964 D = FieldDecl::CreateDeserialized(Context, ID);
3965 break;
3966 case DECL_INDIRECTFIELD:
3967 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3968 break;
3969 case DECL_VAR:
3970 D = VarDecl::CreateDeserialized(Context, ID);
3971 break;
3972 case DECL_IMPLICIT_PARAM:
3973 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3974 break;
3975 case DECL_PARM_VAR:
3976 D = ParmVarDecl::CreateDeserialized(Context, ID);
3977 break;
3978 case DECL_DECOMPOSITION:
3979 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3980 break;
3981 case DECL_BINDING:
3982 D = BindingDecl::CreateDeserialized(Context, ID);
3983 break;
3984 case DECL_FILE_SCOPE_ASM:
3985 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3986 break;
3987 case DECL_BLOCK:
3988 D = BlockDecl::CreateDeserialized(Context, ID);
3989 break;
3990 case DECL_MS_PROPERTY:
3991 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3992 break;
3993 case DECL_MS_GUID:
3994 D = MSGuidDecl::CreateDeserialized(Context, ID);
3995 break;
3996 case DECL_CAPTURED:
3997 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3998 break;
3999 case DECL_CXX_BASE_SPECIFIERS:
4000 Error("attempt to read a C++ base-specifier record as a declaration");
4001 return nullptr;
4002 case DECL_CXX_CTOR_INITIALIZERS:
4003 Error("attempt to read a C++ ctor initializer record as a declaration");
4004 return nullptr;
4005 case DECL_IMPORT:
4006 // Note: last entry of the ImportDecl record is the number of stored source
4007 // locations.
4008 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
4009 break;
4010 case DECL_OMP_THREADPRIVATE:
4011 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
4012 break;
4013 case DECL_OMP_ALLOCATE: {
4014 unsigned NumVars = Record.readInt();
4015 unsigned NumClauses = Record.readInt();
4016 D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
4017 break;
4018 }
4019 case DECL_OMP_REQUIRES:
4020 D = OMPRequiresDecl::CreateDeserialized(Context, ID, Record.readInt());
4021 break;
4022 case DECL_OMP_DECLARE_REDUCTION:
4023 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
4024 break;
4025 case DECL_OMP_DECLARE_MAPPER:
4026 D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, Record.readInt());
4027 break;
4028 case DECL_OMP_CAPTUREDEXPR:
4029 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
4030 break;
4031 case DECL_PRAGMA_COMMENT:
4032 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
4033 break;
4034 case DECL_PRAGMA_DETECT_MISMATCH:
4035 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
4036 Record.readInt());
4037 break;
4038 case DECL_EMPTY:
4039 D = EmptyDecl::CreateDeserialized(Context, ID);
4040 break;
4041 case DECL_LIFETIME_EXTENDED_TEMPORARY:
4042 D = LifetimeExtendedTemporaryDecl::CreateDeserialized(Context, ID);
4043 break;
4044 case DECL_OBJC_TYPE_PARAM:
4045 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
4046 break;
4047 }
4048
4049 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4049, __PRETTY_FUNCTION__))
;
4050 LoadedDecl(Index, D);
4051 // Set the DeclContext before doing any deserialization, to make sure internal
4052 // calls to Decl::getASTContext() by Decl's methods will find the
4053 // TranslationUnitDecl without crashing.
4054 D->setDeclContext(Context.getTranslationUnitDecl());
4055 Reader.Visit(D);
4056
4057 // If this declaration is also a declaration context, get the
4058 // offsets for its tables of lexical and visible declarations.
4059 if (auto *DC = dyn_cast<DeclContext>(D)) {
4060 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
4061 if (Offsets.first &&
4062 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
4063 return nullptr;
4064 if (Offsets.second &&
4065 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
4066 return nullptr;
4067 }
4068 assert(Record.getIdx() == Record.size())((Record.getIdx() == Record.size()) ? static_cast<void>
(0) : __assert_fail ("Record.getIdx() == Record.size()", "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4068, __PRETTY_FUNCTION__))
;
4069
4070 // Load any relevant update records.
4071 PendingUpdateRecords.push_back(
4072 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
4073
4074 // Load the categories after recursive loading is finished.
4075 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
4076 // If we already have a definition when deserializing the ObjCInterfaceDecl,
4077 // we put the Decl in PendingDefinitions so we can pull the categories here.
4078 if (Class->isThisDeclarationADefinition() ||
4079 PendingDefinitions.count(Class))
4080 loadObjCCategories(ID, Class);
4081
4082 // If we have deserialized a declaration that has a definition the
4083 // AST consumer might need to know about, queue it.
4084 // We don't pass it to the consumer immediately because we may be in recursive
4085 // loading, and some declarations may still be initializing.
4086 PotentiallyInterestingDecls.push_back(
4087 InterestingDecl(D, Reader.hasPendingBody()));
4088
4089 return D;
4090}
4091
4092void ASTReader::PassInterestingDeclsToConsumer() {
4093 assert(Consumer)((Consumer) ? static_cast<void> (0) : __assert_fail ("Consumer"
, "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4093, __PRETTY_FUNCTION__))
;
4094
4095 if (PassingDeclsToConsumer)
4096 return;
4097
4098 // Guard variable to avoid recursively redoing the process of passing
4099 // decls to consumer.
4100 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
4101 true);
4102
4103 // Ensure that we've loaded all potentially-interesting declarations
4104 // that need to be eagerly loaded.
4105 for (auto ID : EagerlyDeserializedDecls)
4106 GetDecl(ID);
4107 EagerlyDeserializedDecls.clear();
4108
4109 while (!PotentiallyInterestingDecls.empty()) {
4110 InterestingDecl D = PotentiallyInterestingDecls.front();
4111 PotentiallyInterestingDecls.pop_front();
4112 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
4113 PassInterestingDeclToConsumer(D.getDecl());
4114 }
4115}
4116
4117void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4118 // The declaration may have been modified by files later in the chain.
4119 // If this is the case, read the record containing the updates from each file
4120 // and pass it to ASTDeclReader to make the modifications.
4121 serialization::GlobalDeclID ID = Record.ID;
4122 Decl *D = Record.D;
4123 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4124 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
4125
4126 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
4127
4128 if (UpdI != DeclUpdateOffsets.end()) {
4129 auto UpdateOffsets = std::move(UpdI->second);
4130 DeclUpdateOffsets.erase(UpdI);
4131
4132 // Check if this decl was interesting to the consumer. If we just loaded
4133 // the declaration, then we know it was interesting and we skip the call
4134 // to isConsumerInterestedIn because it is unsafe to call in the
4135 // current ASTReader state.
4136 bool WasInteresting =
4137 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
4138 for (auto &FileAndOffset : UpdateOffsets) {
4139 ModuleFile *F = FileAndOffset.first;
4140 uint64_t Offset = FileAndOffset.second;
4141 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4142 SavedStreamPosition SavedPosition(Cursor);
4143 if (llvm::Error JumpFailed = Cursor.JumpToBit(Offset))
4144 // FIXME don't do a fatal error.
4145 llvm::report_fatal_error(
4146 "ASTReader::loadDeclUpdateRecords failed jumping: " +
4147 toString(std::move(JumpFailed)));
4148 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4149 if (!MaybeCode)
4150 llvm::report_fatal_error(
4151 "ASTReader::loadDeclUpdateRecords failed reading code: " +
4152 toString(MaybeCode.takeError()));
4153 unsigned Code = MaybeCode.get();
4154 ASTRecordReader Record(*this, *F);
4155 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, Code))
4156 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4157, __PRETTY_FUNCTION__))
4157 "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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4157, __PRETTY_FUNCTION__))
;
4158 else
4159 llvm::report_fatal_error(
4160 "ASTReader::loadDeclUpdateRecords failed reading rec code: " +
4161 toString(MaybeCode.takeError()));
4162
4163 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4164 SourceLocation());
4165 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4166
4167 // We might have made this declaration interesting. If so, remember that
4168 // we need to hand it off to the consumer.
4169 if (!WasInteresting &&
4170 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4171 PotentiallyInterestingDecls.push_back(
4172 InterestingDecl(D, Reader.hasPendingBody()));
4173 WasInteresting = true;
4174 }
4175 }
4176 }
4177 // Add the lazy specializations to the template.
4178 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4180, __PRETTY_FUNCTION__))
4179 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4180, __PRETTY_FUNCTION__))
4180 "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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4180, __PRETTY_FUNCTION__))
;
4181 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4182 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4183 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4184 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4185 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4186 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4187 PendingLazySpecializationIDs.clear();
4188
4189 // Load the pending visible updates for this decl context, if it has any.
4190 auto I = PendingVisibleUpdates.find(ID);
4191 if (I != PendingVisibleUpdates.end()) {
4192 auto VisibleUpdates = std::move(I->second);
4193 PendingVisibleUpdates.erase(I);
4194
4195 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4196 for (const auto &Update : VisibleUpdates)
4197 Lookups[DC].Table.add(
4198 Update.Mod, Update.Data,
4199 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4200 DC->setHasExternalVisibleStorage(true);
4201 }
4202}
4203
4204void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4205 // Attach FirstLocal to the end of the decl chain.
4206 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4207 if (FirstLocal != CanonDecl) {
4208 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4209 ASTDeclReader::attachPreviousDecl(
4210 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4211 CanonDecl);
4212 }
4213
4214 if (!LocalOffset) {
4215 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4216 return;
4217 }
4218
4219 // Load the list of other redeclarations from this module file.
4220 ModuleFile *M = getOwningModuleFile(FirstLocal);
4221 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4221, __PRETTY_FUNCTION__))
;
4222
4223 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4224 SavedStreamPosition SavedPosition(Cursor);
4225 if (llvm::Error JumpFailed = Cursor.JumpToBit(LocalOffset))
4226 llvm::report_fatal_error(
4227 "ASTReader::loadPendingDeclChain failed jumping: " +
4228 toString(std::move(JumpFailed)));
4229
4230 RecordData Record;
4231 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4232 if (!MaybeCode)
4233 llvm::report_fatal_error(
4234 "ASTReader::loadPendingDeclChain failed reading code: " +
4235 toString(MaybeCode.takeError()));
4236 unsigned Code = MaybeCode.get();
4237 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record))
4238 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4239, __PRETTY_FUNCTION__))
4239 "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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4239, __PRETTY_FUNCTION__))
;
4240 else
4241 llvm::report_fatal_error(
4242 "ASTReader::loadPendingDeclChain failed reading rec code: " +
4243 toString(MaybeCode.takeError()));
4244
4245 // FIXME: We have several different dispatches on decl kind here; maybe
4246 // we should instead generate one loop per kind and dispatch up-front?
4247 Decl *MostRecent = FirstLocal;
4248 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4249 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4250 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4251 MostRecent = D;
4252 }
4253 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4254}
4255
4256namespace {
4257
4258 /// Given an ObjC interface, goes through the modules and links to the
4259 /// interface all the categories for it.
4260 class ObjCCategoriesVisitor {
4261 ASTReader &Reader;
4262 ObjCInterfaceDecl *Interface;
4263 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4264 ObjCCategoryDecl *Tail = nullptr;
4265 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4266 serialization::GlobalDeclID InterfaceID;
4267 unsigned PreviousGeneration;
4268
4269 void add(ObjCCategoryDecl *Cat) {
4270 // Only process each category once.
4271 if (!Deserialized.erase(Cat))
4272 return;
4273
4274 // Check for duplicate categories.
4275 if (Cat->getDeclName()) {
4276 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4277 if (Existing &&
4278 Reader.getOwningModuleFile(Existing)
4279 != Reader.getOwningModuleFile(Cat)) {
4280 // FIXME: We should not warn for duplicates in diamond:
4281 //
4282 // MT //
4283 // / \ //
4284 // ML MR //
4285 // \ / //
4286 // MB //
4287 //
4288 // If there are duplicates in ML/MR, there will be warning when
4289 // creating MB *and* when importing MB. We should not warn when
4290 // importing.
4291 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4292 << Interface->getDeclName() << Cat->getDeclName();
4293 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4294 } else if (!Existing) {
4295 // Record this category.
4296 Existing = Cat;
4297 }
4298 }
4299
4300 // Add this category to the end of the chain.
4301 if (Tail)
4302 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4303 else
4304 Interface->setCategoryListRaw(Cat);
4305 Tail = Cat;
4306 }
4307
4308 public:
4309 ObjCCategoriesVisitor(ASTReader &Reader,
4310 ObjCInterfaceDecl *Interface,
4311 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4312 serialization::GlobalDeclID InterfaceID,
4313 unsigned PreviousGeneration)
4314 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4315 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4316 // Populate the name -> category map with the set of known categories.
4317 for (auto *Cat : Interface->known_categories()) {
4318 if (Cat->getDeclName())
4319 NameCategoryMap[Cat->getDeclName()] = Cat;
4320
4321 // Keep track of the tail of the category list.
4322 Tail = Cat;
4323 }
4324 }
4325
4326 bool operator()(ModuleFile &M) {
4327 // If we've loaded all of the category information we care about from
4328 // this module file, we're done.
4329 if (M.Generation <= PreviousGeneration)
4330 return true;
4331
4332 // Map global ID of the definition down to the local ID used in this
4333 // module file. If there is no such mapping, we'll find nothing here
4334 // (or in any module it imports).
4335 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4336 if (!LocalID)
4337 return true;
4338
4339 // Perform a binary search to find the local redeclarations for this
4340 // declaration (if any).
4341 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4342 const ObjCCategoriesInfo *Result
4343 = std::lower_bound(M.ObjCCategoriesMap,
4344 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4345 Compare);
4346 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4347 Result->DefinitionID != LocalID) {
4348 // We didn't find anything. If the class definition is in this module
4349 // file, then the module files it depends on cannot have any categories,
4350 // so suppress further lookup.
4351 return Reader.isDeclIDFromModule(InterfaceID, M);
4352 }
4353
4354 // We found something. Dig out all of the categories.
4355 unsigned Offset = Result->Offset;
4356 unsigned N = M.ObjCCategories[Offset];
4357 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4358 for (unsigned I = 0; I != N; ++I)
4359 add(cast_or_null<ObjCCategoryDecl>(
4360 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4361 return true;
4362 }
4363 };
4364
4365} // namespace
4366
4367void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4368 ObjCInterfaceDecl *D,
4369 unsigned PreviousGeneration) {
4370 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4371 PreviousGeneration);
4372 ModuleMgr.visit(Visitor);
4373}
4374
4375template<typename DeclT, typename Fn>
4376static void forAllLaterRedecls(DeclT *D, Fn F) {
4377 F(D);
4378
4379 // Check whether we've already merged D into its redeclaration chain.
4380 // MostRecent may or may not be nullptr if D has not been merged. If
4381 // not, walk the merged redecl chain and see if it's there.
4382 auto *MostRecent = D->getMostRecentDecl();
4383 bool Found = false;
4384 for (auto *Redecl = MostRecent; Redecl && !Found;
4385 Redecl = Redecl->getPreviousDecl())
4386 Found = (Redecl == D);
4387
4388 // If this declaration is merged, apply the functor to all later decls.
4389 if (Found) {
4390 for (auto *Redecl = MostRecent; Redecl != D;
4391 Redecl = Redecl->getPreviousDecl())
4392 F(Redecl);
4393 }
4394}
4395
4396void ASTDeclReader::UpdateDecl(Decl *D,
4397 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4398 while (Record.getIdx() < Record.size()) {
4399 switch ((DeclUpdateKind)Record.readInt()) {
4400 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4401 auto *RD = cast<CXXRecordDecl>(D);
4402 // FIXME: If we also have an update record for instantiating the
4403 // definition of D, we need that to happen before we get here.
4404 Decl *MD = Record.readDecl();
4405 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4405, __PRETTY_FUNCTION__))
;
4406 // FIXME: We should call addHiddenDecl instead, to add the member
4407 // to its DeclContext.
4408 RD->addedMember(MD);
4409 break;
4410 }
4411
4412 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4413 // It will be added to the template's lazy specialization set.
4414 PendingLazySpecializationIDs.push_back(readDeclID());
4415 break;
4416
4417 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4418 auto *Anon = readDeclAs<NamespaceDecl>();
4419
4420 // Each module has its own anonymous namespace, which is disjoint from
4421 // any other module's anonymous namespaces, so don't attach the anonymous
4422 // namespace at all.
4423 if (!Record.isModule()) {
4424 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4425 TU->setAnonymousNamespace(Anon);
4426 else
4427 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4428 }
4429 break;
4430 }
4431
4432 case UPD_CXX_ADDED_VAR_DEFINITION: {
4433 auto *VD = cast<VarDecl>(D);
4434 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4435 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4436 uint64_t Val = Record.readInt();
4437 if (Val && !VD->getInit()) {
4438 VD->setInit(Record.readExpr());
4439 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4440 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4441 Eval->CheckedICE = true;
4442 Eval->IsICE = Val == 3;
4443 }
4444 }
4445 break;
4446 }
4447
4448 case UPD_CXX_POINT_OF_INSTANTIATION: {
4449 SourceLocation POI = Record.readSourceLocation();
4450 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4451 VTSD->setPointOfInstantiation(POI);
4452 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4453 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4454 } else {
4455 auto *FD = cast<FunctionDecl>(D);
4456 if (auto *FTSInfo = FD->TemplateOrSpecialization
4457 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4458 FTSInfo->setPointOfInstantiation(POI);
4459 else
4460 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4461 ->setPointOfInstantiation(POI);
4462 }
4463 break;
4464 }
4465
4466 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4467 auto *Param = cast<ParmVarDecl>(D);
4468
4469 // We have to read the default argument regardless of whether we use it
4470 // so that hypothetical further update records aren't messed up.
4471 // TODO: Add a function to skip over the next expr record.
4472 auto *DefaultArg = Record.readExpr();
4473
4474 // Only apply the update if the parameter still has an uninstantiated
4475 // default argument.
4476 if (Param->hasUninstantiatedDefaultArg())
4477 Param->setDefaultArg(DefaultArg);
4478 break;
4479 }
4480
4481 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4482 auto *FD = cast<FieldDecl>(D);
4483 auto *DefaultInit = Record.readExpr();
4484
4485 // Only apply the update if the field still has an uninstantiated
4486 // default member initializer.
4487 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4488 if (DefaultInit)
4489 FD->setInClassInitializer(DefaultInit);
4490 else
4491 // Instantiation failed. We can get here if we serialized an AST for
4492 // an invalid program.
4493 FD->removeInClassInitializer();
4494 }
4495 break;
4496 }
4497
4498 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4499 auto *FD = cast<FunctionDecl>(D);
4500 if (Reader.PendingBodies[FD]) {
4501 // FIXME: Maybe check for ODR violations.
4502 // It's safe to stop now because this update record is always last.
4503 return;
4504 }
4505
4506 if (Record.readInt()) {
4507 // Maintain AST consistency: any later redeclarations of this function
4508 // are inline if this one is. (We might have merged another declaration
4509 // into this one.)
4510 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4511 FD->setImplicitlyInline();
4512 });
4513 }
4514 FD->setInnerLocStart(readSourceLocation());
4515 ReadFunctionDefinition(FD);
4516 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~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4516, __PRETTY_FUNCTION__))
;
4517 break;
4518 }
4519
4520 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4521 auto *RD = cast<CXXRecordDecl>(D);
4522 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4523 bool HadRealDefinition =
4524 OldDD && (OldDD->Definition != RD ||
4525 !Reader.PendingFakeDefinitionData.count(OldDD));
4526 RD->setParamDestroyedInCallee(Record.readInt());
4527 RD->setArgPassingRestrictions(
4528 (RecordDecl::ArgPassingKind)Record.readInt());
4529 ReadCXXRecordDefinition(RD, /*Update*/true);
4530
4531 // Visible update is handled separately.
4532 uint64_t LexicalOffset = ReadLocalOffset();
4533 if (!HadRealDefinition && LexicalOffset) {
4534 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4535 Reader.PendingFakeDefinitionData.erase(OldDD);
4536 }
4537
4538 auto TSK = (TemplateSpecializationKind)Record.readInt();
4539 SourceLocation POI = readSourceLocation();
4540 if (MemberSpecializationInfo *MSInfo =
4541 RD->getMemberSpecializationInfo()) {
4542 MSInfo->setTemplateSpecializationKind(TSK);
4543 MSInfo->setPointOfInstantiation(POI);
4544 } else {
4545 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4546 Spec->setTemplateSpecializationKind(TSK);
4547 Spec->setPointOfInstantiation(POI);
4548
4549 if (Record.readInt()) {
4550 auto *PartialSpec =
4551 readDeclAs<ClassTemplatePartialSpecializationDecl>();
4552 SmallVector<TemplateArgument, 8> TemplArgs;
4553 Record.readTemplateArgumentList(TemplArgs);
4554 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4555 Reader.getContext(), TemplArgs);
4556
4557 // FIXME: If we already have a partial specialization set,
4558 // check that it matches.
4559 if (!Spec->getSpecializedTemplateOrPartial()
4560 .is<ClassTemplatePartialSpecializationDecl *>())
4561 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4562 }
4563 }
4564
4565 RD->setTagKind((TagTypeKind)Record.readInt());
4566 RD->setLocation(readSourceLocation());
4567 RD->setLocStart(readSourceLocation());
4568 RD->setBraceRange(readSourceRange());
4569
4570 if (Record.readInt()) {
4571 AttrVec Attrs;
4572 Record.readAttributes(Attrs);
4573 // If the declaration already has attributes, we assume that some other
4574 // AST file already loaded them.
4575 if (!D->hasAttrs())
4576 D->setAttrsImpl(Attrs, Reader.getContext());
4577 }
4578 break;
4579 }
4580
4581 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4582 // Set the 'operator delete' directly to avoid emitting another update
4583 // record.
4584 auto *Del = readDeclAs<FunctionDecl>();
4585 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4586 auto *ThisArg = Record.readExpr();
4587 // FIXME: Check consistency if we have an old and new operator delete.
4588 if (!First->OperatorDelete) {
4589 First->OperatorDelete = Del;
4590 First->OperatorDeleteThisArg = ThisArg;
4591 }
4592 break;
4593 }
4594
4595 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4596 SmallVector<QualType, 8> ExceptionStorage;
4597 auto ESI = Record.readExceptionSpecInfo(ExceptionStorage);
4598
4599 // Update this declaration's exception specification, if needed.
4600 auto *FD = cast<FunctionDecl>(D);
4601 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4602 // FIXME: If the exception specification is already present, check that it
4603 // matches.
4604 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4605 FD->setType(Reader.getContext().getFunctionType(
4606 FPT->getReturnType(), FPT->getParamTypes(),
4607 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4608
4609 // When we get to the end of deserializing, see if there are other decls
4610 // that we need to propagate this exception specification onto.
4611 Reader.PendingExceptionSpecUpdates.insert(
4612 std::make_pair(FD->getCanonicalDecl(), FD));
4613 }
4614 break;
4615 }
4616
4617 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4618 auto *FD = cast<FunctionDecl>(D);
4619 QualType DeducedResultType = Record.readType();
4620 Reader.PendingDeducedTypeUpdates.insert(
4621 {FD->getCanonicalDecl(), DeducedResultType});
4622 break;
4623 }
4624
4625 case UPD_DECL_MARKED_USED:
4626 // Maintain AST consistency: any later redeclarations are used too.
4627 D->markUsed(Reader.getContext());
4628 break;
4629
4630 case UPD_MANGLING_NUMBER:
4631 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4632 Record.readInt());
4633 break;
4634
4635 case UPD_STATIC_LOCAL_NUMBER:
4636 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4637 Record.readInt());
4638 break;
4639
4640 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4641 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
4642 Reader.getContext(), readSourceRange(),
4643 AttributeCommonInfo::AS_Pragma));
4644 break;
4645
4646 case UPD_DECL_MARKED_OPENMP_ALLOCATE: {
4647 auto AllocatorKind =
4648 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4649 Expr *Allocator = Record.readExpr();
4650 SourceRange SR = readSourceRange();
4651 D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4652 Reader.getContext(), AllocatorKind, Allocator, SR,
4653 AttributeCommonInfo::AS_Pragma));
4654 break;
4655 }
4656
4657 case UPD_DECL_EXPORTED: {
4658 unsigned SubmoduleID = readSubmoduleID();
4659 auto *Exported = cast<NamedDecl>(D);
4660 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4661 Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4662 Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4663 break;
4664 }
4665
4666 case UPD_DECL_MARKED_OPENMP_DECLARETARGET: {
4667 OMPDeclareTargetDeclAttr::MapTypeTy MapType =
4668 static_cast<OMPDeclareTargetDeclAttr::MapTypeTy>(Record.readInt());
4669 OMPDeclareTargetDeclAttr::DevTypeTy DevType =
4670 static_cast<OMPDeclareTargetDeclAttr::DevTypeTy>(Record.readInt());
4671 D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4672 Reader.getContext(), MapType, DevType, readSourceRange(),
4673 AttributeCommonInfo::AS_Pragma));
4674 break;
4675 }
4676
4677 case UPD_ADDED_ATTR_TO_RECORD:
4678 AttrVec Attrs;
4679 Record.readAttributes(Attrs);
4680 assert(Attrs.size() == 1)((Attrs.size() == 1) ? static_cast<void> (0) : __assert_fail
("Attrs.size() == 1", "/build/llvm-toolchain-snapshot-12~++20200806111125+5446ec85070/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4680, __PRETTY_FUNCTION__))
;
4681 D->addAttr(Attrs[0]);
4682 break;
4683 }
4684 }
4685}