Bug Summary

File:clang/lib/Serialization/ASTReaderDecl.cpp
Warning:line 4121, column 11
Called C++ object pointer is null

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ASTReaderDecl.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-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 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -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-10~+201911111502510600c19528f1809/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/include -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/build-llvm/include -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/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-10/lib/clang/10.0.0/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-10~+201911111502510600c19528f1809/build-llvm/tools/clang/lib/Serialization -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-12-11-181444-25759-1 -x c++ /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/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/ASTReader.h"
52#include "clang/Serialization/ContinuousRangeMap.h"
53#include "clang/Serialization/Module.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-10~+201911111502510600c19528f1809/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 *GetTypeSourceInfo() {
123 return Record.getTypeSourceInfo();
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 void ReadQualifierInfo(QualifierInfo &Info) {
149 Record.readQualifierInfo(Info);
150 }
151
152 void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name) {
153 Record.readDeclarationNameLoc(DNLoc, Name);
154 }
155
156 serialization::SubmoduleID readSubmoduleID() {
157 if (Record.getIdx() == Record.size())
158 return 0;
159
160 return Record.getGlobalSubmoduleID(Record.readInt());
161 }
162
163 Module *readModule() {
164 return Record.getSubmodule(readSubmoduleID());
165 }
166
167 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
168 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
169 const CXXRecordDecl *D);
170 void MergeDefinitionData(CXXRecordDecl *D,
171 struct CXXRecordDecl::DefinitionData &&NewDD);
172 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
173 void MergeDefinitionData(ObjCInterfaceDecl *D,
174 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
175 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
176 void MergeDefinitionData(ObjCProtocolDecl *D,
177 struct ObjCProtocolDecl::DefinitionData &&NewDD);
178
179 static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
180
181 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
182 DeclContext *DC,
183 unsigned Index);
184 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
185 unsigned Index, NamedDecl *D);
186
187 /// Results from loading a RedeclarableDecl.
188 class RedeclarableResult {
189 Decl *MergeWith;
190 GlobalDeclID FirstID;
191 bool IsKeyDecl;
192
193 public:
194 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
195 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
196
197 /// Retrieve the first ID.
198 GlobalDeclID getFirstID() const { return FirstID; }
199
200 /// Is this declaration a key declaration?
201 bool isKeyDecl() const { return IsKeyDecl; }
202
203 /// Get a known declaration that this should be merged with, if
204 /// any.
205 Decl *getKnownMergeTarget() const { return MergeWith; }
206 };
207
208 /// Class used to capture the result of searching for an existing
209 /// declaration of a specific kind and name, along with the ability
210 /// to update the place where this result was found (the declaration
211 /// chain hanging off an identifier or the DeclContext we searched in)
212 /// if requested.
213 class FindExistingResult {
214 ASTReader &Reader;
215 NamedDecl *New = nullptr;
216 NamedDecl *Existing = nullptr;
217 bool AddResult = false;
218 unsigned AnonymousDeclNumber = 0;
219 IdentifierInfo *TypedefNameForLinkage = nullptr;
220
221 public:
222 FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
223
224 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
225 unsigned AnonymousDeclNumber,
226 IdentifierInfo *TypedefNameForLinkage)
227 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
228 AnonymousDeclNumber(AnonymousDeclNumber),
229 TypedefNameForLinkage(TypedefNameForLinkage) {}
230
231 FindExistingResult(FindExistingResult &&Other)
232 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
233 AddResult(Other.AddResult),
234 AnonymousDeclNumber(Other.AnonymousDeclNumber),
235 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
236 Other.AddResult = false;
237 }
238
239 FindExistingResult &operator=(FindExistingResult &&) = delete;
240 ~FindExistingResult();
241
242 /// Suppress the addition of this result into the known set of
243 /// names.
244 void suppress() { AddResult = false; }
245
246 operator NamedDecl*() const { return Existing; }
247
248 template<typename T>
249 operator T*() const { return dyn_cast_or_null<T>(Existing); }
250 };
251
252 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
253 DeclContext *DC);
254 FindExistingResult findExisting(NamedDecl *D);
255
256 public:
257 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
258 ASTReader::RecordLocation Loc,
259 DeclID thisDeclID, SourceLocation ThisDeclLoc)
260 : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
261 ThisDeclLoc(ThisDeclLoc) {}
262
263 template <typename T> static
264 void AddLazySpecializations(T *D,
265 SmallVectorImpl<serialization::DeclID>& IDs) {
266 if (IDs.empty())
267 return;
268
269 // FIXME: We should avoid this pattern of getting the ASTContext.
270 ASTContext &C = D->getASTContext();
271
272 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
273
274 if (auto &Old = LazySpecializations) {
275 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
276 llvm::sort(IDs);
277 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
278 }
279
280 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
281 *Result = IDs.size();
282 std::copy(IDs.begin(), IDs.end(), Result + 1);
283
284 LazySpecializations = Result;
285 }
286
287 template <typename DeclT>
288 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
289 static Decl *getMostRecentDeclImpl(...);
290 static Decl *getMostRecentDecl(Decl *D);
291
292 template <typename DeclT>
293 static void attachPreviousDeclImpl(ASTReader &Reader,
294 Redeclarable<DeclT> *D, Decl *Previous,
295 Decl *Canon);
296 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
297 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
298 Decl *Canon);
299
300 template <typename DeclT>
301 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
302 static void attachLatestDeclImpl(...);
303 static void attachLatestDecl(Decl *D, Decl *latest);
304
305 template <typename DeclT>
306 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
307 static void markIncompleteDeclChainImpl(...);
308
309 /// Determine whether this declaration has a pending body.
310 bool hasPendingBody() const { return HasPendingBody; }
311
312 void ReadFunctionDefinition(FunctionDecl *FD);
313 void Visit(Decl *D);
314
315 void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
316
317 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
318 ObjCCategoryDecl *Next) {
319 Cat->NextClassCategory = Next;
320 }
321
322 void VisitDecl(Decl *D);
323 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
324 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
325 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
326 void VisitNamedDecl(NamedDecl *ND);
327 void VisitLabelDecl(LabelDecl *LD);
328 void VisitNamespaceDecl(NamespaceDecl *D);
329 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
330 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
331 void VisitTypeDecl(TypeDecl *TD);
332 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
333 void VisitTypedefDecl(TypedefDecl *TD);
334 void VisitTypeAliasDecl(TypeAliasDecl *TD);
335 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
336 RedeclarableResult VisitTagDecl(TagDecl *TD);
337 void VisitEnumDecl(EnumDecl *ED);
338 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
339 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
340 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
341 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
342 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
343 ClassTemplateSpecializationDecl *D);
344
345 void VisitClassTemplateSpecializationDecl(
346 ClassTemplateSpecializationDecl *D) {
347 VisitClassTemplateSpecializationDeclImpl(D);
348 }
349
350 void VisitClassTemplatePartialSpecializationDecl(
351 ClassTemplatePartialSpecializationDecl *D);
352 void VisitClassScopeFunctionSpecializationDecl(
353 ClassScopeFunctionSpecializationDecl *D);
354 RedeclarableResult
355 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
356
357 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
358 VisitVarTemplateSpecializationDeclImpl(D);
359 }
360
361 void VisitVarTemplatePartialSpecializationDecl(
362 VarTemplatePartialSpecializationDecl *D);
363 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
364 void VisitValueDecl(ValueDecl *VD);
365 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
366 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
367 void VisitDeclaratorDecl(DeclaratorDecl *DD);
368 void VisitFunctionDecl(FunctionDecl *FD);
369 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
370 void VisitCXXMethodDecl(CXXMethodDecl *D);
371 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
372 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
373 void VisitCXXConversionDecl(CXXConversionDecl *D);
374 void VisitFieldDecl(FieldDecl *FD);
375 void VisitMSPropertyDecl(MSPropertyDecl *FD);
376 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
377 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
378 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
379 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
380 void VisitParmVarDecl(ParmVarDecl *PD);
381 void VisitDecompositionDecl(DecompositionDecl *DD);
382 void VisitBindingDecl(BindingDecl *BD);
383 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
384 DeclID VisitTemplateDecl(TemplateDecl *D);
385 void VisitConceptDecl(ConceptDecl *D);
386 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
387 void VisitClassTemplateDecl(ClassTemplateDecl *D);
388 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
389 void VisitVarTemplateDecl(VarTemplateDecl *D);
390 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
391 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
392 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
393 void VisitUsingDecl(UsingDecl *D);
394 void VisitUsingPackDecl(UsingPackDecl *D);
395 void VisitUsingShadowDecl(UsingShadowDecl *D);
396 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
397 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
398 void VisitExportDecl(ExportDecl *D);
399 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
400 void VisitImportDecl(ImportDecl *D);
401 void VisitAccessSpecDecl(AccessSpecDecl *D);
402 void VisitFriendDecl(FriendDecl *D);
403 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
404 void VisitStaticAssertDecl(StaticAssertDecl *D);
405 void VisitBlockDecl(BlockDecl *BD);
406 void VisitCapturedDecl(CapturedDecl *CD);
407 void VisitEmptyDecl(EmptyDecl *D);
408
409 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
410
411 template<typename T>
412 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
413
414 template<typename T>
415 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
416 DeclID TemplatePatternID = 0);
417
418 template<typename T>
419 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
420 RedeclarableResult &Redecl,
421 DeclID TemplatePatternID = 0);
422
423 template<typename T>
424 void mergeMergeable(Mergeable<T> *D);
425
426 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
427 RedeclarableTemplateDecl *Existing,
428 DeclID DsID, bool IsKeyDecl);
429
430 ObjCTypeParamList *ReadObjCTypeParamList();
431
432 // FIXME: Reorder according to DeclNodes.td?
433 void VisitObjCMethodDecl(ObjCMethodDecl *D);
434 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
435 void VisitObjCContainerDecl(ObjCContainerDecl *D);
436 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
437 void VisitObjCIvarDecl(ObjCIvarDecl *D);
438 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
439 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
440 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
441 void VisitObjCImplDecl(ObjCImplDecl *D);
442 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
443 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
444 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
445 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
446 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
447 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
448 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
449 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
450 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
451 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
452 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
453 };
454
455} // namespace clang
456
457namespace {
458
459/// Iterator over the redeclarations of a declaration that have already
460/// been merged into the same redeclaration chain.
461template<typename DeclT>
462class MergedRedeclIterator {
463 DeclT *Start;
464 DeclT *Canonical = nullptr;
465 DeclT *Current = nullptr;
466
467public:
468 MergedRedeclIterator() = default;
469 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
470
471 DeclT *operator*() { return Current; }
472
473 MergedRedeclIterator &operator++() {
474 if (Current->isFirstDecl()) {
475 Canonical = Current;
476 Current = Current->getMostRecentDecl();
477 } else
478 Current = Current->getPreviousDecl();
479
480 // If we started in the merged portion, we'll reach our start position
481 // eventually. Otherwise, we'll never reach it, but the second declaration
482 // we reached was the canonical declaration, so stop when we see that one
483 // again.
484 if (Current == Start || Current == Canonical)
485 Current = nullptr;
486 return *this;
487 }
488
489 friend bool operator!=(const MergedRedeclIterator &A,
490 const MergedRedeclIterator &B) {
491 return A.Current != B.Current;
492 }
493};
494
495} // namespace
496
497template <typename DeclT>
498static llvm::iterator_range<MergedRedeclIterator<DeclT>>
499merged_redecls(DeclT *D) {
500 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
501 MergedRedeclIterator<DeclT>());
502}
503
504uint64_t ASTDeclReader::GetCurrentCursorOffset() {
505 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
506}
507
508void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
509 if (Record.readInt())
510 Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
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)) {
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-10~+201911111502510600c19528f1809/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 = GetTypeSourceInfo();
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 ReadQualifierInfo(*Info);
720 TD->TypedefNameDeclOrQualifier = Info;
721 break;
722 }
723 case 2: // TypedefNameForAnonDecl
724 NamedDeclForTagDecl = ReadDeclID();
725 TypedefNameForLinkage = Record.getIdentifierInfo();
726 break;
727 default:
728 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/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 = GetTypeSourceInfo())
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 ReadQualifierInfo(*Info);
830 DD->DeclInfo = Info;
831 }
832 QualType TSIType = Record.readType();
833 DD->setTypeSourceInfo(
834 TSIType.isNull() ? nullptr
835 : Reader.getContext().CreateTypeSourceInfo(TSIType));
836}
837
838void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
839 RedeclarableResult Redecl = VisitRedeclarable(FD);
840 VisitDeclaratorDecl(FD);
841
842 // Attach a type to this function. Use the real type if possible, but fall
843 // back to the type as written if it involves a deduced return type.
844 if (FD->getTypeSourceInfo() &&
845 FD->getTypeSourceInfo()->getType()->castAs<FunctionType>()
846 ->getReturnType()->getContainedAutoType()) {
847 // We'll set up the real type in Visit, once we've finished loading the
848 // function.
849 FD->setType(FD->getTypeSourceInfo()->getType());
850 Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
851 } else {
852 FD->setType(Reader.GetType(DeferredTypeID));
853 }
854 DeferredTypeID = 0;
855
856 ReadDeclarationNameLoc(FD->DNLoc, FD->getDeclName());
857 FD->IdentifierNamespace = Record.readInt();
858
859 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
860 // after everything else is read.
861
862 FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
863 FD->setInlineSpecified(Record.readInt());
864 FD->setImplicitlyInline(Record.readInt());
865 FD->setVirtualAsWritten(Record.readInt());
866 FD->setPure(Record.readInt());
867 FD->setHasInheritedPrototype(Record.readInt());
868 FD->setHasWrittenPrototype(Record.readInt());
869 FD->setDeletedAsWritten(Record.readInt());
870 FD->setTrivial(Record.readInt());
871 FD->setTrivialForCall(Record.readInt());
872 FD->setDefaulted(Record.readInt());
873 FD->setExplicitlyDefaulted(Record.readInt());
874 FD->setHasImplicitReturnZero(Record.readInt());
875 FD->setConstexprKind(static_cast<ConstexprSpecKind>(Record.readInt()));
876 FD->setUsesSEHTry(Record.readInt());
877 FD->setHasSkippedBody(Record.readInt());
878 FD->setIsMultiVersion(Record.readInt());
879 FD->setLateTemplateParsed(Record.readInt());
880
881 FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
882 FD->EndRangeLoc = ReadSourceLocation();
883
884 FD->ODRHash = Record.readInt();
885 FD->setHasODRHash(true);
886
887 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
888 case FunctionDecl::TK_NonTemplate:
889 mergeRedeclarable(FD, Redecl);
890 break;
891 case FunctionDecl::TK_FunctionTemplate:
892 // Merged when we merge the template.
893 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
894 break;
895 case FunctionDecl::TK_MemberSpecialization: {
896 auto *InstFD = ReadDeclAs<FunctionDecl>();
897 auto TSK = (TemplateSpecializationKind)Record.readInt();
898 SourceLocation POI = ReadSourceLocation();
899 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
900 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
901 mergeRedeclarable(FD, Redecl);
902 break;
903 }
904 case FunctionDecl::TK_FunctionTemplateSpecialization: {
905 auto *Template = ReadDeclAs<FunctionTemplateDecl>();
906 auto TSK = (TemplateSpecializationKind)Record.readInt();
907
908 // Template arguments.
909 SmallVector<TemplateArgument, 8> TemplArgs;
910 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
911
912 // Template args as written.
913 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
914 SourceLocation LAngleLoc, RAngleLoc;
915 bool HasTemplateArgumentsAsWritten = Record.readInt();
916 if (HasTemplateArgumentsAsWritten) {
917 unsigned NumTemplateArgLocs = Record.readInt();
918 TemplArgLocs.reserve(NumTemplateArgLocs);
919 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
920 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
921
922 LAngleLoc = ReadSourceLocation();
923 RAngleLoc = ReadSourceLocation();
924 }
925
926 SourceLocation POI = ReadSourceLocation();
927
928 ASTContext &C = Reader.getContext();
929 TemplateArgumentList *TemplArgList
930 = TemplateArgumentList::CreateCopy(C, TemplArgs);
931 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
932 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
933 TemplArgsInfo.addArgument(TemplArgLocs[i]);
934
935 MemberSpecializationInfo *MSInfo = nullptr;
936 if (Record.readInt()) {
937 auto *FD = ReadDeclAs<FunctionDecl>();
938 auto TSK = (TemplateSpecializationKind)Record.readInt();
939 SourceLocation POI = ReadSourceLocation();
940
941 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
942 MSInfo->setPointOfInstantiation(POI);
943 }
944
945 FunctionTemplateSpecializationInfo *FTInfo =
946 FunctionTemplateSpecializationInfo::Create(
947 C, FD, Template, TSK, TemplArgList,
948 HasTemplateArgumentsAsWritten ? &TemplArgsInfo : nullptr, POI,
949 MSInfo);
950 FD->TemplateOrSpecialization = FTInfo;
951
952 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
953 // The template that contains the specializations set. It's not safe to
954 // use getCanonicalDecl on Template since it may still be initializing.
955 auto *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
956 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
957 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
958 // FunctionTemplateSpecializationInfo's Profile().
959 // We avoid getASTContext because a decl in the parent hierarchy may
960 // be initializing.
961 llvm::FoldingSetNodeID ID;
962 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
963 void *InsertPos = nullptr;
964 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
965 FunctionTemplateSpecializationInfo *ExistingInfo =
966 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
967 if (InsertPos)
968 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
969 else {
970 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 971, __PRETTY_FUNCTION__))
971 "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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 971, __PRETTY_FUNCTION__))
;
972 mergeRedeclarable(FD, ExistingInfo->getFunction(), Redecl);
973 }
974 }
975 break;
976 }
977 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
978 // Templates.
979 UnresolvedSet<8> TemplDecls;
980 unsigned NumTemplates = Record.readInt();
981 while (NumTemplates--)
982 TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
983
984 // Templates args.
985 TemplateArgumentListInfo TemplArgs;
986 unsigned NumArgs = Record.readInt();
987 while (NumArgs--)
988 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
989 TemplArgs.setLAngleLoc(ReadSourceLocation());
990 TemplArgs.setRAngleLoc(ReadSourceLocation());
991
992 FD->setDependentTemplateSpecialization(Reader.getContext(),
993 TemplDecls, TemplArgs);
994 // These are not merged; we don't need to merge redeclarations of dependent
995 // template friends.
996 break;
997 }
998 }
999
1000 // Read in the parameters.
1001 unsigned NumParams = Record.readInt();
1002 SmallVector<ParmVarDecl *, 16> Params;
1003 Params.reserve(NumParams);
1004 for (unsigned I = 0; I != NumParams; ++I)
1005 Params.push_back(ReadDeclAs<ParmVarDecl>());
1006 FD->setParams(Reader.getContext(), Params);
1007}
1008
1009void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
1010 VisitNamedDecl(MD);
1011 if (Record.readInt()) {
1012 // Load the body on-demand. Most clients won't care, because method
1013 // definitions rarely show up in headers.
1014 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1015 HasPendingBody = true;
1016 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
1017 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
1018 }
1019 MD->setInstanceMethod(Record.readInt());
1020 MD->setVariadic(Record.readInt());
1021 MD->setPropertyAccessor(Record.readInt());
1022 MD->setSynthesizedAccessorStub(Record.readInt());
1023 MD->setDefined(Record.readInt());
1024 MD->setOverriding(Record.readInt());
1025 MD->setHasSkippedBody(Record.readInt());
1026
1027 MD->setIsRedeclaration(Record.readInt());
1028 MD->setHasRedeclaration(Record.readInt());
1029 if (MD->hasRedeclaration())
1030 Reader.getContext().setObjCMethodRedeclaration(MD,
1031 ReadDeclAs<ObjCMethodDecl>());
1032
1033 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1034 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1035 MD->setRelatedResultType(Record.readInt());
1036 MD->setReturnType(Record.readType());
1037 MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
1038 MD->DeclEndLoc = ReadSourceLocation();
1039 unsigned NumParams = Record.readInt();
1040 SmallVector<ParmVarDecl *, 16> Params;
1041 Params.reserve(NumParams);
1042 for (unsigned I = 0; I != NumParams; ++I)
1043 Params.push_back(ReadDeclAs<ParmVarDecl>());
1044
1045 MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1046 unsigned NumStoredSelLocs = Record.readInt();
1047 SmallVector<SourceLocation, 16> SelLocs;
1048 SelLocs.reserve(NumStoredSelLocs);
1049 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1050 SelLocs.push_back(ReadSourceLocation());
1051
1052 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1053}
1054
1055void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1056 VisitTypedefNameDecl(D);
1057
1058 D->Variance = Record.readInt();
1059 D->Index = Record.readInt();
1060 D->VarianceLoc = ReadSourceLocation();
1061 D->ColonLoc = ReadSourceLocation();
1062}
1063
1064void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1065 VisitNamedDecl(CD);
1066 CD->setAtStartLoc(ReadSourceLocation());
1067 CD->setAtEndRange(ReadSourceRange());
1068}
1069
1070ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1071 unsigned numParams = Record.readInt();
1072 if (numParams == 0)
1073 return nullptr;
1074
1075 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1076 typeParams.reserve(numParams);
1077 for (unsigned i = 0; i != numParams; ++i) {
1078 auto *typeParam = ReadDeclAs<ObjCTypeParamDecl>();
1079 if (!typeParam)
1080 return nullptr;
1081
1082 typeParams.push_back(typeParam);
1083 }
1084
1085 SourceLocation lAngleLoc = ReadSourceLocation();
1086 SourceLocation rAngleLoc = ReadSourceLocation();
1087
1088 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1089 typeParams, rAngleLoc);
1090}
1091
1092void ASTDeclReader::ReadObjCDefinitionData(
1093 struct ObjCInterfaceDecl::DefinitionData &Data) {
1094 // Read the superclass.
1095 Data.SuperClassTInfo = GetTypeSourceInfo();
1096
1097 Data.EndLoc = ReadSourceLocation();
1098 Data.HasDesignatedInitializers = Record.readInt();
1099
1100 // Read the directly referenced protocols and their SourceLocations.
1101 unsigned NumProtocols = Record.readInt();
1102 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1103 Protocols.reserve(NumProtocols);
1104 for (unsigned I = 0; I != NumProtocols; ++I)
1105 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1106 SmallVector<SourceLocation, 16> ProtoLocs;
1107 ProtoLocs.reserve(NumProtocols);
1108 for (unsigned I = 0; I != NumProtocols; ++I)
1109 ProtoLocs.push_back(ReadSourceLocation());
1110 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1111 Reader.getContext());
1112
1113 // Read the transitive closure of protocols referenced by this class.
1114 NumProtocols = Record.readInt();
1115 Protocols.clear();
1116 Protocols.reserve(NumProtocols);
1117 for (unsigned I = 0; I != NumProtocols; ++I)
1118 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1119 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1120 Reader.getContext());
1121}
1122
1123void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1124 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1125 // FIXME: odr checking?
1126}
1127
1128void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1129 RedeclarableResult Redecl = VisitRedeclarable(ID);
1130 VisitObjCContainerDecl(ID);
1131 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1132 mergeRedeclarable(ID, Redecl);
1133
1134 ID->TypeParamList = ReadObjCTypeParamList();
1135 if (Record.readInt()) {
1136 // Read the definition.
1137 ID->allocateDefinitionData();
1138
1139 ReadObjCDefinitionData(ID->data());
1140 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1141 if (Canon->Data.getPointer()) {
1142 // If we already have a definition, keep the definition invariant and
1143 // merge the data.
1144 MergeDefinitionData(Canon, std::move(ID->data()));
1145 ID->Data = Canon->Data;
1146 } else {
1147 // Set the definition data of the canonical declaration, so other
1148 // redeclarations will see it.
1149 ID->getCanonicalDecl()->Data = ID->Data;
1150
1151 // We will rebuild this list lazily.
1152 ID->setIvarList(nullptr);
1153 }
1154
1155 // Note that we have deserialized a definition.
1156 Reader.PendingDefinitions.insert(ID);
1157
1158 // Note that we've loaded this Objective-C class.
1159 Reader.ObjCClassesLoaded.push_back(ID);
1160 } else {
1161 ID->Data = ID->getCanonicalDecl()->Data;
1162 }
1163}
1164
1165void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1166 VisitFieldDecl(IVD);
1167 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1168 // This field will be built lazily.
1169 IVD->setNextIvar(nullptr);
1170 bool synth = Record.readInt();
1171 IVD->setSynthesize(synth);
1172}
1173
1174void ASTDeclReader::ReadObjCDefinitionData(
1175 struct ObjCProtocolDecl::DefinitionData &Data) {
1176 unsigned NumProtoRefs = Record.readInt();
1177 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1178 ProtoRefs.reserve(NumProtoRefs);
1179 for (unsigned I = 0; I != NumProtoRefs; ++I)
1180 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1181 SmallVector<SourceLocation, 16> ProtoLocs;
1182 ProtoLocs.reserve(NumProtoRefs);
1183 for (unsigned I = 0; I != NumProtoRefs; ++I)
1184 ProtoLocs.push_back(ReadSourceLocation());
1185 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1186 ProtoLocs.data(), Reader.getContext());
1187}
1188
1189void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1190 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1191 // FIXME: odr checking?
1192}
1193
1194void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1195 RedeclarableResult Redecl = VisitRedeclarable(PD);
1196 VisitObjCContainerDecl(PD);
1197 mergeRedeclarable(PD, Redecl);
1198
1199 if (Record.readInt()) {
1200 // Read the definition.
1201 PD->allocateDefinitionData();
1202
1203 ReadObjCDefinitionData(PD->data());
1204
1205 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1206 if (Canon->Data.getPointer()) {
1207 // If we already have a definition, keep the definition invariant and
1208 // merge the data.
1209 MergeDefinitionData(Canon, std::move(PD->data()));
1210 PD->Data = Canon->Data;
1211 } else {
1212 // Set the definition data of the canonical declaration, so other
1213 // redeclarations will see it.
1214 PD->getCanonicalDecl()->Data = PD->Data;
1215 }
1216 // Note that we have deserialized a definition.
1217 Reader.PendingDefinitions.insert(PD);
1218 } else {
1219 PD->Data = PD->getCanonicalDecl()->Data;
1220 }
1221}
1222
1223void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1224 VisitFieldDecl(FD);
1225}
1226
1227void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1228 VisitObjCContainerDecl(CD);
1229 CD->setCategoryNameLoc(ReadSourceLocation());
1230 CD->setIvarLBraceLoc(ReadSourceLocation());
1231 CD->setIvarRBraceLoc(ReadSourceLocation());
1232
1233 // Note that this category has been deserialized. We do this before
1234 // deserializing the interface declaration, so that it will consider this
1235 /// category.
1236 Reader.CategoriesDeserialized.insert(CD);
1237
1238 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1239 CD->TypeParamList = ReadObjCTypeParamList();
1240 unsigned NumProtoRefs = Record.readInt();
1241 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1242 ProtoRefs.reserve(NumProtoRefs);
1243 for (unsigned I = 0; I != NumProtoRefs; ++I)
1244 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1245 SmallVector<SourceLocation, 16> ProtoLocs;
1246 ProtoLocs.reserve(NumProtoRefs);
1247 for (unsigned I = 0; I != NumProtoRefs; ++I)
1248 ProtoLocs.push_back(ReadSourceLocation());
1249 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1250 Reader.getContext());
1251
1252 // Protocols in the class extension belong to the class.
1253 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1254 CD->ClassInterface->mergeClassExtensionProtocolList(
1255 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1256 Reader.getContext());
1257}
1258
1259void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1260 VisitNamedDecl(CAD);
1261 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1262}
1263
1264void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1265 VisitNamedDecl(D);
1266 D->setAtLoc(ReadSourceLocation());
1267 D->setLParenLoc(ReadSourceLocation());
1268 QualType T = Record.readType();
1269 TypeSourceInfo *TSI = GetTypeSourceInfo();
1270 D->setType(T, TSI);
1271 D->setPropertyAttributes(
1272 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1273 D->setPropertyAttributesAsWritten(
1274 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1275 D->setPropertyImplementation(
1276 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1277 DeclarationName GetterName = Record.readDeclarationName();
1278 SourceLocation GetterLoc = ReadSourceLocation();
1279 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1280 DeclarationName SetterName = Record.readDeclarationName();
1281 SourceLocation SetterLoc = ReadSourceLocation();
1282 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1283 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1284 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1285 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1286}
1287
1288void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1289 VisitObjCContainerDecl(D);
1290 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1291}
1292
1293void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1294 VisitObjCImplDecl(D);
1295 D->CategoryNameLoc = ReadSourceLocation();
1296}
1297
1298void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1299 VisitObjCImplDecl(D);
1300 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1301 D->SuperLoc = ReadSourceLocation();
1302 D->setIvarLBraceLoc(ReadSourceLocation());
1303 D->setIvarRBraceLoc(ReadSourceLocation());
1304 D->setHasNonZeroConstructors(Record.readInt());
1305 D->setHasDestructors(Record.readInt());
1306 D->NumIvarInitializers = Record.readInt();
1307 if (D->NumIvarInitializers)
1308 D->IvarInitializers = ReadGlobalOffset();
1309}
1310
1311void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1312 VisitDecl(D);
1313 D->setAtLoc(ReadSourceLocation());
1314 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1315 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1316 D->IvarLoc = ReadSourceLocation();
1317 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1318 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1319 D->setGetterCXXConstructor(Record.readExpr());
1320 D->setSetterCXXAssignment(Record.readExpr());
1321}
1322
1323void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1324 VisitDeclaratorDecl(FD);
1325 FD->Mutable = Record.readInt();
1326
1327 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1328 FD->InitStorage.setInt(ISK);
1329 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1330 ? Record.readType().getAsOpaquePtr()
1331 : Record.readExpr());
1332 }
1333
1334 if (auto *BW = Record.readExpr())
1335 FD->setBitWidth(BW);
1336
1337 if (!FD->getDeclName()) {
1338 if (auto *Tmpl = ReadDeclAs<FieldDecl>())
1339 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1340 }
1341 mergeMergeable(FD);
1342}
1343
1344void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1345 VisitDeclaratorDecl(PD);
1346 PD->GetterId = Record.getIdentifierInfo();
1347 PD->SetterId = Record.getIdentifierInfo();
1348}
1349
1350void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1351 VisitValueDecl(FD);
1352
1353 FD->ChainingSize = Record.readInt();
1354 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1354, __PRETTY_FUNCTION__))
;
1355 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1356
1357 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1358 FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1359
1360 mergeMergeable(FD);
1361}
1362
1363ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1364 RedeclarableResult Redecl = VisitRedeclarable(VD);
1365 VisitDeclaratorDecl(VD);
1366
1367 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1368 VD->VarDeclBits.TSCSpec = Record.readInt();
1369 VD->VarDeclBits.InitStyle = Record.readInt();
1370 VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1371 if (!isa<ParmVarDecl>(VD)) {
1372 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1373 Record.readInt();
1374 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1375 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1376 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1377 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1378 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1379 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1380 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1381 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1382 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1383 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1384 VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1385 }
1386 auto VarLinkage = Linkage(Record.readInt());
1387 VD->setCachedLinkage(VarLinkage);
1388
1389 // Reconstruct the one piece of the IdentifierNamespace that we need.
1390 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1391 VD->getLexicalDeclContext()->isFunctionOrMethod())
1392 VD->setLocalExternDecl();
1393
1394 if (uint64_t Val = Record.readInt()) {
1395 VD->setInit(Record.readExpr());
1396 if (Val > 1) {
1397 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1398 Eval->CheckedICE = true;
1399 Eval->IsICE = (Val & 1) != 0;
1400 Eval->HasConstantDestruction = (Val & 4) != 0;
1401 }
1402 }
1403
1404 if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1405 Expr *CopyExpr = Record.readExpr();
1406 if (CopyExpr)
1407 Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1408 }
1409
1410 if (VD->getStorageDuration() == SD_Static && Record.readInt())
1411 Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1412
1413 enum VarKind {
1414 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1415 };
1416 switch ((VarKind)Record.readInt()) {
1417 case VarNotTemplate:
1418 // Only true variables (not parameters or implicit parameters) can be
1419 // merged; the other kinds are not really redeclarable at all.
1420 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1421 !isa<VarTemplateSpecializationDecl>(VD))
1422 mergeRedeclarable(VD, Redecl);
1423 break;
1424 case VarTemplate:
1425 // Merged when we merge the template.
1426 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1427 break;
1428 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1429 auto *Tmpl = ReadDeclAs<VarDecl>();
1430 auto TSK = (TemplateSpecializationKind)Record.readInt();
1431 SourceLocation POI = ReadSourceLocation();
1432 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1433 mergeRedeclarable(VD, Redecl);
1434 break;
1435 }
1436 }
1437
1438 return Redecl;
1439}
1440
1441void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1442 VisitVarDecl(PD);
1443}
1444
1445void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1446 VisitVarDecl(PD);
1447 unsigned isObjCMethodParam = Record.readInt();
1448 unsigned scopeDepth = Record.readInt();
1449 unsigned scopeIndex = Record.readInt();
1450 unsigned declQualifier = Record.readInt();
1451 if (isObjCMethodParam) {
1452 assert(scopeDepth == 0)((scopeDepth == 0) ? static_cast<void> (0) : __assert_fail
("scopeDepth == 0", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1452, __PRETTY_FUNCTION__))
;
1453 PD->setObjCMethodScopeInfo(scopeIndex);
1454 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1455 } else {
1456 PD->setScopeInfo(scopeDepth, scopeIndex);
1457 }
1458 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1459 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1460 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1461 PD->setUninstantiatedDefaultArg(Record.readExpr());
1462
1463 // FIXME: If this is a redeclaration of a function from another module, handle
1464 // inheritance of default arguments.
1465}
1466
1467void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1468 VisitVarDecl(DD);
1469 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1470 for (unsigned I = 0; I != DD->NumBindings; ++I) {
1471 BDs[I] = ReadDeclAs<BindingDecl>();
1472 BDs[I]->setDecomposedDecl(DD);
1473 }
1474}
1475
1476void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1477 VisitValueDecl(BD);
1478 BD->Binding = Record.readExpr();
1479}
1480
1481void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1482 VisitDecl(AD);
1483 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1484 AD->setRParenLoc(ReadSourceLocation());
1485}
1486
1487void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1488 VisitDecl(BD);
1489 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1490 BD->setSignatureAsWritten(GetTypeSourceInfo());
1491 unsigned NumParams = Record.readInt();
1492 SmallVector<ParmVarDecl *, 16> Params;
1493 Params.reserve(NumParams);
1494 for (unsigned I = 0; I != NumParams; ++I)
1495 Params.push_back(ReadDeclAs<ParmVarDecl>());
1496 BD->setParams(Params);
1497
1498 BD->setIsVariadic(Record.readInt());
1499 BD->setBlockMissingReturnType(Record.readInt());
1500 BD->setIsConversionFromLambda(Record.readInt());
1501 BD->setDoesNotEscape(Record.readInt());
1502 BD->setCanAvoidCopyToHeap(Record.readInt());
1503
1504 bool capturesCXXThis = Record.readInt();
1505 unsigned numCaptures = Record.readInt();
1506 SmallVector<BlockDecl::Capture, 16> captures;
1507 captures.reserve(numCaptures);
1508 for (unsigned i = 0; i != numCaptures; ++i) {
1509 auto *decl = ReadDeclAs<VarDecl>();
1510 unsigned flags = Record.readInt();
1511 bool byRef = (flags & 1);
1512 bool nested = (flags & 2);
1513 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1514
1515 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1516 }
1517 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1518}
1519
1520void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1521 VisitDecl(CD);
1522 unsigned ContextParamPos = Record.readInt();
1523 CD->setNothrow(Record.readInt() != 0);
1524 // Body is set by VisitCapturedStmt.
1525 for (unsigned I = 0; I < CD->NumParams; ++I) {
1526 if (I != ContextParamPos)
1527 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1528 else
1529 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1530 }
1531}
1532
1533void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1534 VisitDecl(D);
1535 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1536 D->setExternLoc(ReadSourceLocation());
1537 D->setRBraceLoc(ReadSourceLocation());
1538}
1539
1540void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1541 VisitDecl(D);
1542 D->RBraceLoc = ReadSourceLocation();
1543}
1544
1545void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1546 VisitNamedDecl(D);
1547 D->setLocStart(ReadSourceLocation());
1548}
1549
1550void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1551 RedeclarableResult Redecl = VisitRedeclarable(D);
1552 VisitNamedDecl(D);
1553 D->setInline(Record.readInt());
1554 D->LocStart = ReadSourceLocation();
1555 D->RBraceLoc = ReadSourceLocation();
1556
1557 // Defer loading the anonymous namespace until we've finished merging
1558 // this namespace; loading it might load a later declaration of the
1559 // same namespace, and we have an invariant that older declarations
1560 // get merged before newer ones try to merge.
1561 GlobalDeclID AnonNamespace = 0;
1562 if (Redecl.getFirstID() == ThisDeclID) {
1563 AnonNamespace = ReadDeclID();
1564 } else {
1565 // Link this namespace back to the first declaration, which has already
1566 // been deserialized.
1567 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1568 }
1569
1570 mergeRedeclarable(D, Redecl);
1571
1572 if (AnonNamespace) {
1573 // Each module has its own anonymous namespace, which is disjoint from
1574 // any other module's anonymous namespaces, so don't attach the anonymous
1575 // namespace at all.
1576 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1577 if (!Record.isModule())
1578 D->setAnonymousNamespace(Anon);
1579 }
1580}
1581
1582void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1583 RedeclarableResult Redecl = VisitRedeclarable(D);
1584 VisitNamedDecl(D);
1585 D->NamespaceLoc = ReadSourceLocation();
1586 D->IdentLoc = ReadSourceLocation();
1587 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1588 D->Namespace = ReadDeclAs<NamedDecl>();
1589 mergeRedeclarable(D, Redecl);
1590}
1591
1592void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1593 VisitNamedDecl(D);
1594 D->setUsingLoc(ReadSourceLocation());
1595 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1596 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1597 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1598 D->setTypename(Record.readInt());
1599 if (auto *Pattern = ReadDeclAs<NamedDecl>())
1600 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1601 mergeMergeable(D);
1602}
1603
1604void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1605 VisitNamedDecl(D);
1606 D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1607 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1608 for (unsigned I = 0; I != D->NumExpansions; ++I)
1609 Expansions[I] = ReadDeclAs<NamedDecl>();
1610 mergeMergeable(D);
1611}
1612
1613void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1614 RedeclarableResult Redecl = VisitRedeclarable(D);
1615 VisitNamedDecl(D);
1616 D->Underlying = ReadDeclAs<NamedDecl>();
1617 D->IdentifierNamespace = Record.readInt();
1618 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1619 auto *Pattern = ReadDeclAs<UsingShadowDecl>();
1620 if (Pattern)
1621 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1622 mergeRedeclarable(D, Redecl);
1623}
1624
1625void ASTDeclReader::VisitConstructorUsingShadowDecl(
1626 ConstructorUsingShadowDecl *D) {
1627 VisitUsingShadowDecl(D);
1628 D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1629 D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1630 D->IsVirtual = Record.readInt();
1631}
1632
1633void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1634 VisitNamedDecl(D);
1635 D->UsingLoc = ReadSourceLocation();
1636 D->NamespaceLoc = ReadSourceLocation();
1637 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1638 D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1639 D->CommonAncestor = ReadDeclAs<DeclContext>();
1640}
1641
1642void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1643 VisitValueDecl(D);
1644 D->setUsingLoc(ReadSourceLocation());
1645 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1646 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1647 D->EllipsisLoc = ReadSourceLocation();
1648 mergeMergeable(D);
1649}
1650
1651void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1652 UnresolvedUsingTypenameDecl *D) {
1653 VisitTypeDecl(D);
1654 D->TypenameLocation = ReadSourceLocation();
1655 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1656 D->EllipsisLoc = ReadSourceLocation();
1657 mergeMergeable(D);
1658}
1659
1660void ASTDeclReader::ReadCXXDefinitionData(
1661 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1662 #define FIELD(Name, Width, Merge) \
1663 Data.Name = Record.readInt();
1664 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1665
1666 // Note: the caller has deserialized the IsLambda bit already.
1667 Data.ODRHash = Record.readInt();
1668 Data.HasODRHash = true;
1669
1670 if (Record.readInt())
1671 Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1672
1673 Data.NumBases = Record.readInt();
1674 if (Data.NumBases)
1675 Data.Bases = ReadGlobalOffset();
1676 Data.NumVBases = Record.readInt();
1677 if (Data.NumVBases)
1678 Data.VBases = ReadGlobalOffset();
1679
1680 Record.readUnresolvedSet(Data.Conversions);
1681 Data.ComputedVisibleConversions = Record.readInt();
1682 if (Data.ComputedVisibleConversions)
1683 Record.readUnresolvedSet(Data.VisibleConversions);
1684 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1684, __PRETTY_FUNCTION__))
;
1685 Data.FirstFriend = ReadDeclID();
1686
1687 if (Data.IsLambda) {
1688 using Capture = LambdaCapture;
1689
1690 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1691 Lambda.Dependent = Record.readInt();
1692 Lambda.IsGenericLambda = Record.readInt();
1693 Lambda.CaptureDefault = Record.readInt();
1694 Lambda.NumCaptures = Record.readInt();
1695 Lambda.NumExplicitCaptures = Record.readInt();
1696 Lambda.HasKnownInternalLinkage = Record.readInt();
1697 Lambda.ManglingNumber = Record.readInt();
1698 Lambda.ContextDecl = ReadDeclID();
1699 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1700 sizeof(Capture) * Lambda.NumCaptures);
1701 Capture *ToCapture = Lambda.Captures;
1702 Lambda.MethodTyInfo = GetTypeSourceInfo();
1703 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1704 SourceLocation Loc = ReadSourceLocation();
1705 bool IsImplicit = Record.readInt();
1706 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1707 switch (Kind) {
1708 case LCK_StarThis:
1709 case LCK_This:
1710 case LCK_VLAType:
1711 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1712 break;
1713 case LCK_ByCopy:
1714 case LCK_ByRef:
1715 auto *Var = ReadDeclAs<VarDecl>();
1716 SourceLocation EllipsisLoc = ReadSourceLocation();
1717 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1718 break;
1719 }
1720 }
1721 }
1722}
1723
1724void ASTDeclReader::MergeDefinitionData(
1725 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1726 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1727, __PRETTY_FUNCTION__))
1727 "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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1727, __PRETTY_FUNCTION__))
;
1728 auto &DD = *D->DefinitionData;
1729
1730 if (DD.Definition != MergeDD.Definition) {
1731 // Track that we merged the definitions.
1732 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1733 DD.Definition));
1734 Reader.PendingDefinitions.erase(MergeDD.Definition);
1735 MergeDD.Definition->setCompleteDefinition(false);
1736 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1737 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1738, __PRETTY_FUNCTION__))
1738 "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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1738, __PRETTY_FUNCTION__))
;
1739 }
1740
1741 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1742 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1743 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1744 // We faked up this definition data because we found a class for which we'd
1745 // not yet loaded the definition. Replace it with the real thing now.
1746 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1746, __PRETTY_FUNCTION__))
;
1747 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1748
1749 // Don't change which declaration is the definition; that is required
1750 // to be invariant once we select it.
1751 auto *Def = DD.Definition;
1752 DD = std::move(MergeDD);
1753 DD.Definition = Def;
1754 return;
1755 }
1756
1757 bool DetectedOdrViolation = false;
1758
1759 #define FIELD(Name, Width, Merge) Merge(Name)
1760 #define MERGE_OR(Field) DD.Field |= MergeDD.Field;
1761 #define NO_MERGE(Field) \
1762 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1763 MERGE_OR(Field)
1764 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1765 NO_MERGE(IsLambda)
1766 #undef NO_MERGE
1767 #undef MERGE_OR
1768
1769 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1770 DetectedOdrViolation = true;
1771 // FIXME: Issue a diagnostic if the base classes don't match when we come
1772 // to lazily load them.
1773
1774 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1775 // match when we come to lazily load them.
1776 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1777 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1778 DD.ComputedVisibleConversions = true;
1779 }
1780
1781 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1782 // lazily load it.
1783
1784 if (DD.IsLambda) {
1785 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1786 // when they occur within the body of a function template specialization).
1787 }
1788
1789 if (D->getODRHash() != MergeDD.ODRHash) {
1790 DetectedOdrViolation = true;
1791 }
1792
1793 if (DetectedOdrViolation)
1794 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1795 {MergeDD.Definition, &MergeDD});
1796}
1797
1798void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1799 struct CXXRecordDecl::DefinitionData *DD;
1800 ASTContext &C = Reader.getContext();
1801
1802 // Determine whether this is a lambda closure type, so that we can
1803 // allocate the appropriate DefinitionData structure.
1804 bool IsLambda = Record.readInt();
1805 if (IsLambda)
1806 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1807 LCD_None);
1808 else
1809 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1810
1811 CXXRecordDecl *Canon = D->getCanonicalDecl();
1812 // Set decl definition data before reading it, so that during deserialization
1813 // when we read CXXRecordDecl, it already has definition data and we don't
1814 // set fake one.
1815 if (!Canon->DefinitionData)
1816 Canon->DefinitionData = DD;
1817 D->DefinitionData = Canon->DefinitionData;
1818 ReadCXXDefinitionData(*DD, D);
1819
1820 // We might already have a different definition for this record. This can
1821 // happen either because we're reading an update record, or because we've
1822 // already done some merging. Either way, just merge into it.
1823 if (Canon->DefinitionData != DD) {
1824 MergeDefinitionData(Canon, std::move(*DD));
1825 return;
1826 }
1827
1828 // Mark this declaration as being a definition.
1829 D->setCompleteDefinition(true);
1830
1831 // If this is not the first declaration or is an update record, we can have
1832 // other redeclarations already. Make a note that we need to propagate the
1833 // DefinitionData pointer onto them.
1834 if (Update || Canon != D)
1835 Reader.PendingDefinitions.insert(D);
1836}
1837
1838ASTDeclReader::RedeclarableResult
1839ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1840 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1841
1842 ASTContext &C = Reader.getContext();
1843
1844 enum CXXRecKind {
1845 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1846 };
1847 switch ((CXXRecKind)Record.readInt()) {
1848 case CXXRecNotTemplate:
1849 // Merged when we merge the folding set entry in the primary template.
1850 if (!isa<ClassTemplateSpecializationDecl>(D))
1851 mergeRedeclarable(D, Redecl);
1852 break;
1853 case CXXRecTemplate: {
1854 // Merged when we merge the template.
1855 auto *Template = ReadDeclAs<ClassTemplateDecl>();
1856 D->TemplateOrInstantiation = Template;
1857 if (!Template->getTemplatedDecl()) {
1858 // We've not actually loaded the ClassTemplateDecl yet, because we're
1859 // currently being loaded as its pattern. Rely on it to set up our
1860 // TypeForDecl (see VisitClassTemplateDecl).
1861 //
1862 // Beware: we do not yet know our canonical declaration, and may still
1863 // get merged once the surrounding class template has got off the ground.
1864 DeferredTypeID = 0;
1865 }
1866 break;
1867 }
1868 case CXXRecMemberSpecialization: {
1869 auto *RD = ReadDeclAs<CXXRecordDecl>();
1870 auto TSK = (TemplateSpecializationKind)Record.readInt();
1871 SourceLocation POI = ReadSourceLocation();
1872 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1873 MSI->setPointOfInstantiation(POI);
1874 D->TemplateOrInstantiation = MSI;
1875 mergeRedeclarable(D, Redecl);
1876 break;
1877 }
1878 }
1879
1880 bool WasDefinition = Record.readInt();
1881 if (WasDefinition)
1882 ReadCXXRecordDefinition(D, /*Update*/false);
1883 else
1884 // Propagate DefinitionData pointer from the canonical declaration.
1885 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1886
1887 // Lazily load the key function to avoid deserializing every method so we can
1888 // compute it.
1889 if (WasDefinition) {
1890 DeclID KeyFn = ReadDeclID();
1891 if (KeyFn && D->isCompleteDefinition())
1892 // FIXME: This is wrong for the ARM ABI, where some other module may have
1893 // made this function no longer be a key function. We need an update
1894 // record or similar for that case.
1895 C.KeyFunctions[D] = KeyFn;
1896 }
1897
1898 return Redecl;
1899}
1900
1901void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1902 D->setExplicitSpecifier(Record.readExplicitSpec());
1903 VisitFunctionDecl(D);
1904 D->setIsCopyDeductionCandidate(Record.readInt());
1905}
1906
1907void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1908 VisitFunctionDecl(D);
1909
1910 unsigned NumOverridenMethods = Record.readInt();
1911 if (D->isCanonicalDecl()) {
1912 while (NumOverridenMethods--) {
1913 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1914 // MD may be initializing.
1915 if (auto *MD = ReadDeclAs<CXXMethodDecl>())
1916 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1917 }
1918 } else {
1919 // We don't care about which declarations this used to override; we get
1920 // the relevant information from the canonical declaration.
1921 Record.skipInts(NumOverridenMethods);
1922 }
1923}
1924
1925void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1926 // We need the inherited constructor information to merge the declaration,
1927 // so we have to read it before we call VisitCXXMethodDecl.
1928 D->setExplicitSpecifier(Record.readExplicitSpec());
1929 if (D->isInheritingConstructor()) {
1930 auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1931 auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1932 *D->getTrailingObjects<InheritedConstructor>() =
1933 InheritedConstructor(Shadow, Ctor);
1934 }
1935
1936 VisitCXXMethodDecl(D);
1937}
1938
1939void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1940 VisitCXXMethodDecl(D);
1941
1942 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
1943 CXXDestructorDecl *Canon = D->getCanonicalDecl();
1944 auto *ThisArg = Record.readExpr();
1945 // FIXME: Check consistency if we have an old and new operator delete.
1946 if (!Canon->OperatorDelete) {
1947 Canon->OperatorDelete = OperatorDelete;
1948 Canon->OperatorDeleteThisArg = ThisArg;
1949 }
1950 }
1951}
1952
1953void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1954 D->setExplicitSpecifier(Record.readExplicitSpec());
1955 VisitCXXMethodDecl(D);
1956}
1957
1958void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1959 VisitDecl(D);
1960 D->ImportedAndComplete.setPointer(readModule());
1961 D->ImportedAndComplete.setInt(Record.readInt());
1962 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
1963 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1964 StoredLocs[I] = ReadSourceLocation();
1965 Record.skipInts(1); // The number of stored source locations.
1966}
1967
1968void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1969 VisitDecl(D);
1970 D->setColonLoc(ReadSourceLocation());
1971}
1972
1973void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1974 VisitDecl(D);
1975 if (Record.readInt()) // hasFriendDecl
1976 D->Friend = ReadDeclAs<NamedDecl>();
1977 else
1978 D->Friend = GetTypeSourceInfo();
1979 for (unsigned i = 0; i != D->NumTPLists; ++i)
1980 D->getTrailingObjects<TemplateParameterList *>()[i] =
1981 Record.readTemplateParameterList();
1982 D->NextFriend = ReadDeclID();
1983 D->UnsupportedFriend = (Record.readInt() != 0);
1984 D->FriendLoc = ReadSourceLocation();
1985}
1986
1987void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1988 VisitDecl(D);
1989 unsigned NumParams = Record.readInt();
1990 D->NumParams = NumParams;
1991 D->Params = new TemplateParameterList*[NumParams];
1992 for (unsigned i = 0; i != NumParams; ++i)
1993 D->Params[i] = Record.readTemplateParameterList();
1994 if (Record.readInt()) // HasFriendDecl
1995 D->Friend = ReadDeclAs<NamedDecl>();
1996 else
1997 D->Friend = GetTypeSourceInfo();
1998 D->FriendLoc = ReadSourceLocation();
1999}
2000
2001DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2002 VisitNamedDecl(D);
2003
2004 DeclID PatternID = ReadDeclID();
2005 auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2006 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2007 D->init(TemplatedDecl, TemplateParams);
2008
2009 return PatternID;
2010}
2011
2012void ASTDeclReader::VisitConceptDecl(ConceptDecl *D) {
2013 VisitTemplateDecl(D);
2014 D->ConstraintExpr = Record.readExpr();
2015 mergeMergeable(D);
2016}
2017
2018ASTDeclReader::RedeclarableResult
2019ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2020 RedeclarableResult Redecl = VisitRedeclarable(D);
2021
2022 // Make sure we've allocated the Common pointer first. We do this before
2023 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2024 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2025 if (!CanonD->Common) {
2026 CanonD->Common = CanonD->newCommon(Reader.getContext());
2027 Reader.PendingDefinitions.insert(CanonD);
2028 }
2029 D->Common = CanonD->Common;
2030
2031 // If this is the first declaration of the template, fill in the information
2032 // for the 'common' pointer.
2033 if (ThisDeclID == Redecl.getFirstID()) {
2034 if (auto *RTD = ReadDeclAs<RedeclarableTemplateDecl>()) {
2035 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2036, __PRETTY_FUNCTION__))
2036 "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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2036, __PRETTY_FUNCTION__))
;
2037 D->setInstantiatedFromMemberTemplate(RTD);
2038 if (Record.readInt())
2039 D->setMemberSpecialization();
2040 }
2041 }
2042
2043 DeclID PatternID = VisitTemplateDecl(D);
2044 D->IdentifierNamespace = Record.readInt();
2045
2046 mergeRedeclarable(D, Redecl, PatternID);
2047
2048 // If we merged the template with a prior declaration chain, merge the common
2049 // pointer.
2050 // FIXME: Actually merge here, don't just overwrite.
2051 D->Common = D->getCanonicalDecl()->Common;
2052
2053 return Redecl;
2054}
2055
2056void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2057 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2058
2059 if (ThisDeclID == Redecl.getFirstID()) {
2060 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2061 // the specializations.
2062 SmallVector<serialization::DeclID, 32> SpecIDs;
2063 ReadDeclIDList(SpecIDs);
2064 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2065 }
2066
2067 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2068 // We were loaded before our templated declaration was. We've not set up
2069 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2070 // it now.
2071 Reader.getContext().getInjectedClassNameType(
2072 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2073 }
2074}
2075
2076void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2077 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2077)
;
2078}
2079
2080/// TODO: Unify with ClassTemplateDecl version?
2081/// May require unifying ClassTemplateDecl and
2082/// VarTemplateDecl beyond TemplateDecl...
2083void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2084 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2085
2086 if (ThisDeclID == Redecl.getFirstID()) {
2087 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2088 // the specializations.
2089 SmallVector<serialization::DeclID, 32> SpecIDs;
2090 ReadDeclIDList(SpecIDs);
2091 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2092 }
2093}
2094
2095ASTDeclReader::RedeclarableResult
2096ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2097 ClassTemplateSpecializationDecl *D) {
2098 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2099
2100 ASTContext &C = Reader.getContext();
2101 if (Decl *InstD = ReadDecl()) {
2102 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2103 D->SpecializedTemplate = CTD;
2104 } else {
2105 SmallVector<TemplateArgument, 8> TemplArgs;
2106 Record.readTemplateArgumentList(TemplArgs);
2107 TemplateArgumentList *ArgList
2108 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2109 auto *PS =
2110 new (C) ClassTemplateSpecializationDecl::
2111 SpecializedPartialSpecialization();
2112 PS->PartialSpecialization
2113 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2114 PS->TemplateArgs = ArgList;
2115 D->SpecializedTemplate = PS;
2116 }
2117 }
2118
2119 SmallVector<TemplateArgument, 8> TemplArgs;
2120 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2121 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2122 D->PointOfInstantiation = ReadSourceLocation();
2123 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2124
2125 bool writtenAsCanonicalDecl = Record.readInt();
2126 if (writtenAsCanonicalDecl) {
2127 auto *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2128 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2129 // Set this as, or find, the canonical declaration for this specialization
2130 ClassTemplateSpecializationDecl *CanonSpec;
2131 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2132 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2133 .GetOrInsertNode(Partial);
2134 } else {
2135 CanonSpec =
2136 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2137 }
2138 // If there was already a canonical specialization, merge into it.
2139 if (CanonSpec != D) {
2140 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2141
2142 // This declaration might be a definition. Merge with any existing
2143 // definition.
2144 if (auto *DDD = D->DefinitionData) {
2145 if (CanonSpec->DefinitionData)
2146 MergeDefinitionData(CanonSpec, std::move(*DDD));
2147 else
2148 CanonSpec->DefinitionData = D->DefinitionData;
2149 }
2150 D->DefinitionData = CanonSpec->DefinitionData;
2151 }
2152 }
2153 }
2154
2155 // Explicit info.
2156 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2157 auto *ExplicitInfo =
2158 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2159 ExplicitInfo->TypeAsWritten = TyInfo;
2160 ExplicitInfo->ExternLoc = ReadSourceLocation();
2161 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2162 D->ExplicitInfo = ExplicitInfo;
2163 }
2164
2165 return Redecl;
2166}
2167
2168void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2169 ClassTemplatePartialSpecializationDecl *D) {
2170 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2171
2172 TemplateParameterList *Params = Record.readTemplateParameterList();
2173 D->TemplateParams = Params;
2174 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2175
2176 // These are read/set from/to the first declaration.
2177 if (ThisDeclID == Redecl.getFirstID()) {
2178 D->InstantiatedFromMember.setPointer(
2179 ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2180 D->InstantiatedFromMember.setInt(Record.readInt());
2181 }
2182}
2183
2184void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2185 ClassScopeFunctionSpecializationDecl *D) {
2186 VisitDecl(D);
2187 D->Specialization = ReadDeclAs<CXXMethodDecl>();
2188 if (Record.readInt())
2189 D->TemplateArgs = Record.readASTTemplateArgumentListInfo();
2190}
2191
2192void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2193 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2194
2195 if (ThisDeclID == Redecl.getFirstID()) {
2196 // This FunctionTemplateDecl owns a CommonPtr; read it.
2197 SmallVector<serialization::DeclID, 32> SpecIDs;
2198 ReadDeclIDList(SpecIDs);
2199 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2200 }
2201}
2202
2203/// TODO: Unify with ClassTemplateSpecializationDecl version?
2204/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2205/// VarTemplate(Partial)SpecializationDecl with a new data
2206/// structure Template(Partial)SpecializationDecl, and
2207/// using Template(Partial)SpecializationDecl as input type.
2208ASTDeclReader::RedeclarableResult
2209ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2210 VarTemplateSpecializationDecl *D) {
2211 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2212
2213 ASTContext &C = Reader.getContext();
2214 if (Decl *InstD = ReadDecl()) {
2215 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2216 D->SpecializedTemplate = VTD;
2217 } else {
2218 SmallVector<TemplateArgument, 8> TemplArgs;
2219 Record.readTemplateArgumentList(TemplArgs);
2220 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2221 C, TemplArgs);
2222 auto *PS =
2223 new (C)
2224 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2225 PS->PartialSpecialization =
2226 cast<VarTemplatePartialSpecializationDecl>(InstD);
2227 PS->TemplateArgs = ArgList;
2228 D->SpecializedTemplate = PS;
2229 }
2230 }
2231
2232 // Explicit info.
2233 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2234 auto *ExplicitInfo =
2235 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2236 ExplicitInfo->TypeAsWritten = TyInfo;
2237 ExplicitInfo->ExternLoc = ReadSourceLocation();
2238 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2239 D->ExplicitInfo = ExplicitInfo;
2240 }
2241
2242 SmallVector<TemplateArgument, 8> TemplArgs;
2243 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2244 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2245 D->PointOfInstantiation = ReadSourceLocation();
2246 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2247 D->IsCompleteDefinition = Record.readInt();
2248
2249 bool writtenAsCanonicalDecl = Record.readInt();
2250 if (writtenAsCanonicalDecl) {
2251 auto *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2252 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2253 // FIXME: If it's already present, merge it.
2254 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2255 CanonPattern->getCommonPtr()->PartialSpecializations
2256 .GetOrInsertNode(Partial);
2257 } else {
2258 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2259 }
2260 }
2261 }
2262
2263 return Redecl;
2264}
2265
2266/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2267/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2268/// VarTemplate(Partial)SpecializationDecl with a new data
2269/// structure Template(Partial)SpecializationDecl, and
2270/// using Template(Partial)SpecializationDecl as input type.
2271void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2272 VarTemplatePartialSpecializationDecl *D) {
2273 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2274
2275 TemplateParameterList *Params = Record.readTemplateParameterList();
2276 D->TemplateParams = Params;
2277 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2278
2279 // These are read/set from/to the first declaration.
2280 if (ThisDeclID == Redecl.getFirstID()) {
2281 D->InstantiatedFromMember.setPointer(
2282 ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2283 D->InstantiatedFromMember.setInt(Record.readInt());
2284 }
2285}
2286
2287void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2288 VisitTypeDecl(D);
2289
2290 D->setDeclaredWithTypename(Record.readInt());
2291
2292 // TODO: Concepts: Immediately introduced constraint
2293 if (Record.readInt())
2294 D->setDefaultArgument(GetTypeSourceInfo());
2295}
2296
2297void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2298 VisitDeclaratorDecl(D);
2299 // TemplateParmPosition.
2300 D->setDepth(Record.readInt());
2301 D->setPosition(Record.readInt());
2302 if (D->isExpandedParameterPack()) {
2303 auto TypesAndInfos =
2304 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2305 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2306 new (&TypesAndInfos[I].first) QualType(Record.readType());
2307 TypesAndInfos[I].second = GetTypeSourceInfo();
2308 }
2309 } else {
2310 // Rest of NonTypeTemplateParmDecl.
2311 D->ParameterPack = Record.readInt();
2312 if (Record.readInt())
2313 D->setDefaultArgument(Record.readExpr());
2314 }
2315}
2316
2317void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2318 VisitTemplateDecl(D);
2319 // TemplateParmPosition.
2320 D->setDepth(Record.readInt());
2321 D->setPosition(Record.readInt());
2322 if (D->isExpandedParameterPack()) {
2323 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2324 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2325 I != N; ++I)
2326 Data[I] = Record.readTemplateParameterList();
2327 } else {
2328 // Rest of TemplateTemplateParmDecl.
2329 D->ParameterPack = Record.readInt();
2330 if (Record.readInt())
2331 D->setDefaultArgument(Reader.getContext(),
2332 Record.readTemplateArgumentLoc());
2333 }
2334}
2335
2336void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2337 VisitRedeclarableTemplateDecl(D);
2338}
2339
2340void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2341 VisitDecl(D);
2342 D->AssertExprAndFailed.setPointer(Record.readExpr());
2343 D->AssertExprAndFailed.setInt(Record.readInt());
2344 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2345 D->RParenLoc = ReadSourceLocation();
2346}
2347
2348void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2349 VisitDecl(D);
2350}
2351
2352std::pair<uint64_t, uint64_t>
2353ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2354 uint64_t LexicalOffset = ReadLocalOffset();
2355 uint64_t VisibleOffset = ReadLocalOffset();
2356 return std::make_pair(LexicalOffset, VisibleOffset);
2357}
2358
2359template <typename T>
2360ASTDeclReader::RedeclarableResult
2361ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2362 DeclID FirstDeclID = ReadDeclID();
2363 Decl *MergeWith = nullptr;
2364
2365 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2366 bool IsFirstLocalDecl = false;
2367
2368 uint64_t RedeclOffset = 0;
2369
2370 // 0 indicates that this declaration was the only declaration of its entity,
2371 // and is used for space optimization.
2372 if (FirstDeclID == 0) {
2373 FirstDeclID = ThisDeclID;
2374 IsKeyDecl = true;
2375 IsFirstLocalDecl = true;
2376 } else if (unsigned N = Record.readInt()) {
2377 // This declaration was the first local declaration, but may have imported
2378 // other declarations.
2379 IsKeyDecl = N == 1;
2380 IsFirstLocalDecl = true;
2381
2382 // We have some declarations that must be before us in our redeclaration
2383 // chain. Read them now, and remember that we ought to merge with one of
2384 // them.
2385 // FIXME: Provide a known merge target to the second and subsequent such
2386 // declaration.
2387 for (unsigned I = 0; I != N - 1; ++I)
2388 MergeWith = ReadDecl();
2389
2390 RedeclOffset = ReadLocalOffset();
2391 } else {
2392 // This declaration was not the first local declaration. Read the first
2393 // local declaration now, to trigger the import of other redeclarations.
2394 (void)ReadDecl();
2395 }
2396
2397 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2398 if (FirstDecl != D) {
2399 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2400 // We temporarily set the first (canonical) declaration as the previous one
2401 // which is the one that matters and mark the real previous DeclID to be
2402 // loaded & attached later on.
2403 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2404 D->First = FirstDecl->getCanonicalDecl();
2405 }
2406
2407 auto *DAsT = static_cast<T *>(D);
2408
2409 // Note that we need to load local redeclarations of this decl and build a
2410 // decl chain for them. This must happen *after* we perform the preloading
2411 // above; this ensures that the redeclaration chain is built in the correct
2412 // order.
2413 if (IsFirstLocalDecl)
2414 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2415
2416 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2417}
2418
2419/// Attempts to merge the given declaration (D) with another declaration
2420/// of the same entity.
2421template<typename T>
2422void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2423 RedeclarableResult &Redecl,
2424 DeclID TemplatePatternID) {
2425 // If modules are not available, there is no reason to perform this merge.
2426 if (!Reader.getContext().getLangOpts().Modules)
2427 return;
2428
2429 // If we're not the canonical declaration, we don't need to merge.
2430 if (!DBase->isFirstDecl())
2431 return;
2432
2433 auto *D = static_cast<T *>(DBase);
2434
2435 if (auto *Existing = Redecl.getKnownMergeTarget())
2436 // We already know of an existing declaration we should merge with.
2437 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2438 else if (FindExistingResult ExistingRes = findExisting(D))
2439 if (T *Existing = ExistingRes)
2440 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2441}
2442
2443/// "Cast" to type T, asserting if we don't have an implicit conversion.
2444/// We use this to put code in a template that will only be valid for certain
2445/// instantiations.
2446template<typename T> static T assert_cast(T t) { return t; }
2447template<typename T> static T assert_cast(...) {
2448 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2448)
;
2449}
2450
2451/// Merge together the pattern declarations from two template
2452/// declarations.
2453void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2454 RedeclarableTemplateDecl *Existing,
2455 DeclID DsID, bool IsKeyDecl) {
2456 auto *DPattern = D->getTemplatedDecl();
2457 auto *ExistingPattern = Existing->getTemplatedDecl();
2458 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2459 DPattern->getCanonicalDecl()->getGlobalID(),
2460 IsKeyDecl);
2461
2462 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2463 // Merge with any existing definition.
2464 // FIXME: This is duplicated in several places. Refactor.
2465 auto *ExistingClass =
2466 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2467 if (auto *DDD = DClass->DefinitionData) {
2468 if (ExistingClass->DefinitionData) {
2469 MergeDefinitionData(ExistingClass, std::move(*DDD));
2470 } else {
2471 ExistingClass->DefinitionData = DClass->DefinitionData;
2472 // We may have skipped this before because we thought that DClass
2473 // was the canonical declaration.
2474 Reader.PendingDefinitions.insert(DClass);
2475 }
2476 }
2477 DClass->DefinitionData = ExistingClass->DefinitionData;
2478
2479 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2480 Result);
2481 }
2482 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2483 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2484 Result);
2485 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2486 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2487 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2488 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2489 Result);
2490 llvm_unreachable("merged an unknown kind of redeclarable template")::llvm::llvm_unreachable_internal("merged an unknown kind of redeclarable template"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2490)
;
2491}
2492
2493/// Attempts to merge the given declaration (D) with another declaration
2494/// of the same entity.
2495template<typename T>
2496void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2497 RedeclarableResult &Redecl,
2498 DeclID TemplatePatternID) {
2499 auto *D = static_cast<T *>(DBase);
2500 T *ExistingCanon = Existing->getCanonicalDecl();
2501 T *DCanon = D->getCanonicalDecl();
2502 if (ExistingCanon != DCanon) {
2503 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2504, __PRETTY_FUNCTION__))
2504 "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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2504, __PRETTY_FUNCTION__))
;
2505
2506 // Have our redeclaration link point back at the canonical declaration
2507 // of the existing declaration, so that this declaration has the
2508 // appropriate canonical declaration.
2509 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2510 D->First = ExistingCanon;
2511 ExistingCanon->Used |= D->Used;
2512 D->Used = false;
2513
2514 // When we merge a namespace, update its pointer to the first namespace.
2515 // We cannot have loaded any redeclarations of this declaration yet, so
2516 // there's nothing else that needs to be updated.
2517 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2518 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2519 assert_cast<NamespaceDecl*>(ExistingCanon));
2520
2521 // When we merge a template, merge its pattern.
2522 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2523 mergeTemplatePattern(
2524 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2525 TemplatePatternID, Redecl.isKeyDecl());
2526
2527 // If this declaration is a key declaration, make a note of that.
2528 if (Redecl.isKeyDecl())
2529 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2530 }
2531}
2532
2533/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2534/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2535/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2536/// that some types are mergeable during deserialization, otherwise name
2537/// lookup fails. This is the case for EnumConstantDecl.
2538static bool allowODRLikeMergeInC(NamedDecl *ND) {
2539 if (!ND)
2540 return false;
2541 // TODO: implement merge for other necessary decls.
2542 if (isa<EnumConstantDecl>(ND))
2543 return true;
2544 return false;
2545}
2546
2547/// Attempts to merge the given declaration (D) with another declaration
2548/// of the same entity, for the case where the entity is not actually
2549/// redeclarable. This happens, for instance, when merging the fields of
2550/// identical class definitions from two different modules.
2551template<typename T>
2552void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2553 // If modules are not available, there is no reason to perform this merge.
2554 if (!Reader.getContext().getLangOpts().Modules)
2555 return;
2556
2557 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2558 // Note that C identically-named things in different translation units are
2559 // not redeclarations, but may still have compatible types, where ODR-like
2560 // semantics may apply.
2561 if (!Reader.getContext().getLangOpts().CPlusPlus &&
2562 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2563 return;
2564
2565 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2566 if (T *Existing = ExistingRes)
2567 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2568 Existing->getCanonicalDecl());
2569}
2570
2571void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2572 VisitDecl(D);
2573 unsigned NumVars = D->varlist_size();
2574 SmallVector<Expr *, 16> Vars;
2575 Vars.reserve(NumVars);
2576 for (unsigned i = 0; i != NumVars; ++i) {
2577 Vars.push_back(Record.readExpr());
2578 }
2579 D->setVars(Vars);
2580}
2581
2582void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2583 VisitDecl(D);
2584 unsigned NumVars = D->varlist_size();
2585 unsigned NumClauses = D->clauselist_size();
2586 SmallVector<Expr *, 16> Vars;
2587 Vars.reserve(NumVars);
2588 for (unsigned i = 0; i != NumVars; ++i) {
2589 Vars.push_back(Record.readExpr());
2590 }
2591 D->setVars(Vars);
2592 SmallVector<OMPClause *, 8> Clauses;
2593 Clauses.reserve(NumClauses);
2594 OMPClauseReader ClauseReader(Record);
2595 for (unsigned I = 0; I != NumClauses; ++I)
2596 Clauses.push_back(ClauseReader.readClause());
2597 D->setClauses(Clauses);
2598}
2599
2600void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
2601 VisitDecl(D);
2602 unsigned NumClauses = D->clauselist_size();
2603 SmallVector<OMPClause *, 8> Clauses;
2604 Clauses.reserve(NumClauses);
2605 OMPClauseReader ClauseReader(Record);
2606 for (unsigned I = 0; I != NumClauses; ++I)
2607 Clauses.push_back(ClauseReader.readClause());
2608 D->setClauses(Clauses);
2609}
2610
2611void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2612 VisitValueDecl(D);
2613 D->setLocation(ReadSourceLocation());
2614 Expr *In = Record.readExpr();
2615 Expr *Out = Record.readExpr();
2616 D->setCombinerData(In, Out);
2617 Expr *Combiner = Record.readExpr();
2618 D->setCombiner(Combiner);
2619 Expr *Orig = Record.readExpr();
2620 Expr *Priv = Record.readExpr();
2621 D->setInitializerData(Orig, Priv);
2622 Expr *Init = Record.readExpr();
2623 auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2624 D->setInitializer(Init, IK);
2625 D->PrevDeclInScope = ReadDeclID();
2626}
2627
2628void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2629 VisitValueDecl(D);
2630 D->setLocation(ReadSourceLocation());
2631 Expr *MapperVarRefE = Record.readExpr();
2632 D->setMapperVarRef(MapperVarRefE);
2633 D->VarName = Record.readDeclarationName();
2634 D->PrevDeclInScope = ReadDeclID();
2635 unsigned NumClauses = D->clauselist_size();
2636 SmallVector<OMPClause *, 8> Clauses;
2637 Clauses.reserve(NumClauses);
2638 OMPClauseReader ClauseReader(Record);
2639 for (unsigned I = 0; I != NumClauses; ++I)
2640 Clauses.push_back(ClauseReader.readClause());
2641 D->setClauses(Clauses);
2642}
2643
2644void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2645 VisitVarDecl(D);
2646}
2647
2648//===----------------------------------------------------------------------===//
2649// Attribute Reading
2650//===----------------------------------------------------------------------===//
2651
2652namespace {
2653class AttrReader {
2654 ModuleFile *F;
2655 ASTReader *Reader;
2656 const ASTReader::RecordData &Record;
2657 unsigned &Idx;
2658
2659public:
2660 AttrReader(ModuleFile &F, ASTReader &Reader,
2661 const ASTReader::RecordData &Record, unsigned &Idx)
2662 : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}
2663
2664 const uint64_t &readInt() { return Record[Idx++]; }
2665
2666 SourceRange readSourceRange() {
2667 return Reader->ReadSourceRange(*F, Record, Idx);
2668 }
2669
2670 SourceLocation readSourceLocation() {
2671 return Reader->ReadSourceLocation(*F, Record, Idx);
2672 }
2673
2674 Expr *readExpr() { return Reader->ReadExpr(*F); }
2675
2676 std::string readString() {
2677 return Reader->ReadString(Record, Idx);
2678 }
2679
2680 TypeSourceInfo *getTypeSourceInfo() {
2681 return Reader->GetTypeSourceInfo(*F, Record, Idx);
2682 }
2683
2684 IdentifierInfo *getIdentifierInfo() {
2685 return Reader->GetIdentifierInfo(*F, Record, Idx);
2686 }
2687
2688 VersionTuple readVersionTuple() {
2689 return ASTReader::ReadVersionTuple(Record, Idx);
2690 }
2691
2692 template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2693 return cast_or_null<T>(Reader->GetLocalDecl(*F, LocalID));
2694 }
2695};
2696}
2697
2698Attr *ASTReader::ReadAttr(ModuleFile &M, const RecordData &Rec,
2699 unsigned &Idx) {
2700 AttrReader Record(M, *this, Rec, Idx);
2701 auto V = Record.readInt();
2702 if (!V)
2703 return nullptr;
2704
2705 Attr *New = nullptr;
2706 // Kind is stored as a 1-based integer because 0 is used to indicate a null
2707 // Attr pointer.
2708 auto Kind = static_cast<attr::Kind>(V - 1);
2709 ASTContext &Context = getContext();
2710
2711 IdentifierInfo *AttrName = Record.getIdentifierInfo();
2712 IdentifierInfo *ScopeName = Record.getIdentifierInfo();
2713 SourceRange AttrRange = Record.readSourceRange();
2714 SourceLocation ScopeLoc = Record.readSourceLocation();
2715 unsigned ParsedKind = Record.readInt();
2716 unsigned Syntax = Record.readInt();
2717 unsigned SpellingIndex = Record.readInt();
2718
2719 AttributeCommonInfo Info(AttrName, ScopeName, AttrRange, ScopeLoc,
2720 AttributeCommonInfo::Kind(ParsedKind),
2721 AttributeCommonInfo::Syntax(Syntax), SpellingIndex);
2722
2723#include "clang/Serialization/AttrPCHRead.inc"
2724
2725 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2725, __PRETTY_FUNCTION__))
;
2726 return New;
2727}
2728
2729/// Reads attributes from the current stream position.
2730void ASTReader::ReadAttributes(ASTRecordReader &Record, AttrVec &Attrs) {
2731 for (unsigned I = 0, E = Record.readInt(); I != E; ++I)
2732 Attrs.push_back(Record.readAttr());
2733}
2734
2735//===----------------------------------------------------------------------===//
2736// ASTReader Implementation
2737//===----------------------------------------------------------------------===//
2738
2739/// Note that we have loaded the declaration with the given
2740/// Index.
2741///
2742/// This routine notes that this declaration has already been loaded,
2743/// so that future GetDecl calls will return this declaration rather
2744/// than trying to load a new declaration.
2745inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2746 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2746, __PRETTY_FUNCTION__))
;
2747 DeclsLoaded[Index] = D;
2748}
2749
2750/// Determine whether the consumer will be interested in seeing
2751/// this declaration (via HandleTopLevelDecl).
2752///
2753/// This routine should return true for anything that might affect
2754/// code generation, e.g., inline function definitions, Objective-C
2755/// declarations with metadata, etc.
2756static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2757 // An ObjCMethodDecl is never considered as "interesting" because its
2758 // implementation container always is.
2759
2760 // An ImportDecl or VarDecl imported from a module map module will get
2761 // emitted when we import the relevant module.
2762 if (isPartOfPerModuleInitializer(D)) {
2763 auto *M = D->getImportedOwningModule();
2764 if (M && M->Kind == Module::ModuleMapModule &&
2765 Ctx.DeclMustBeEmitted(D))
2766 return false;
2767 }
2768
2769 if (isa<FileScopeAsmDecl>(D) ||
2770 isa<ObjCProtocolDecl>(D) ||
2771 isa<ObjCImplDecl>(D) ||
2772 isa<ImportDecl>(D) ||
2773 isa<PragmaCommentDecl>(D) ||
2774 isa<PragmaDetectMismatchDecl>(D))
2775 return true;
2776 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2777 isa<OMPDeclareMapperDecl>(D) || isa<OMPAllocateDecl>(D))
2778 return !D->getDeclContext()->isFunctionOrMethod();
2779 if (const auto *Var = dyn_cast<VarDecl>(D))
2780 return Var->isFileVarDecl() &&
2781 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2782 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2783 if (const auto *Func = dyn_cast<FunctionDecl>(D))
2784 return Func->doesThisDeclarationHaveABody() || HasBody;
2785
2786 if (auto *ES = D->getASTContext().getExternalSource())
2787 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2788 return true;
2789
2790 return false;
2791}
2792
2793/// Get the correct cursor and offset for loading a declaration.
2794ASTReader::RecordLocation
2795ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2796 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2797 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2797, __PRETTY_FUNCTION__))
;
2798 ModuleFile *M = I->second;
2799 const DeclOffset &DOffs =
2800 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2801 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2802 return RecordLocation(M, DOffs.BitOffset);
2803}
2804
2805ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2806 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2807
2808 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2808, __PRETTY_FUNCTION__))
;
2809 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2810}
2811
2812uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2813 return LocalOffset + M.GlobalBitOffset;
2814}
2815
2816static bool isSameTemplateParameterList(const TemplateParameterList *X,
2817 const TemplateParameterList *Y);
2818
2819/// Determine whether two template parameters are similar enough
2820/// that they may be used in declarations of the same template.
2821static bool isSameTemplateParameter(const NamedDecl *X,
2822 const NamedDecl *Y) {
2823 if (X->getKind() != Y->getKind())
2824 return false;
2825
2826 if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2827 const auto *TY = cast<TemplateTypeParmDecl>(Y);
2828 return TX->isParameterPack() == TY->isParameterPack();
2829 }
2830
2831 if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2832 const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2833 return TX->isParameterPack() == TY->isParameterPack() &&
2834 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2835 }
2836
2837 const auto *TX = cast<TemplateTemplateParmDecl>(X);
2838 const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2839 return TX->isParameterPack() == TY->isParameterPack() &&
2840 isSameTemplateParameterList(TX->getTemplateParameters(),
2841 TY->getTemplateParameters());
2842}
2843
2844static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2845 if (auto *NS = X->getAsNamespace())
2846 return NS;
2847 if (auto *NAS = X->getAsNamespaceAlias())
2848 return NAS->getNamespace();
2849 return nullptr;
2850}
2851
2852static bool isSameQualifier(const NestedNameSpecifier *X,
2853 const NestedNameSpecifier *Y) {
2854 if (auto *NSX = getNamespace(X)) {
2855 auto *NSY = getNamespace(Y);
2856 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2857 return false;
2858 } else if (X->getKind() != Y->getKind())
2859 return false;
2860
2861 // FIXME: For namespaces and types, we're permitted to check that the entity
2862 // is named via the same tokens. We should probably do so.
2863 switch (X->getKind()) {
2864 case NestedNameSpecifier::Identifier:
2865 if (X->getAsIdentifier() != Y->getAsIdentifier())
2866 return false;
2867 break;
2868 case NestedNameSpecifier::Namespace:
2869 case NestedNameSpecifier::NamespaceAlias:
2870 // We've already checked that we named the same namespace.
2871 break;
2872 case NestedNameSpecifier::TypeSpec:
2873 case NestedNameSpecifier::TypeSpecWithTemplate:
2874 if (X->getAsType()->getCanonicalTypeInternal() !=
2875 Y->getAsType()->getCanonicalTypeInternal())
2876 return false;
2877 break;
2878 case NestedNameSpecifier::Global:
2879 case NestedNameSpecifier::Super:
2880 return true;
2881 }
2882
2883 // Recurse into earlier portion of NNS, if any.
2884 auto *PX = X->getPrefix();
2885 auto *PY = Y->getPrefix();
2886 if (PX && PY)
2887 return isSameQualifier(PX, PY);
2888 return !PX && !PY;
2889}
2890
2891/// Determine whether two template parameter lists are similar enough
2892/// that they may be used in declarations of the same template.
2893static bool isSameTemplateParameterList(const TemplateParameterList *X,
2894 const TemplateParameterList *Y) {
2895 if (X->size() != Y->size())
2896 return false;
2897
2898 for (unsigned I = 0, N = X->size(); I != N; ++I)
2899 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2900 return false;
2901
2902 return true;
2903}
2904
2905/// Determine whether the attributes we can overload on are identical for A and
2906/// B. Will ignore any overloadable attrs represented in the type of A and B.
2907static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2908 const FunctionDecl *B) {
2909 // Note that pass_object_size attributes are represented in the function's
2910 // ExtParameterInfo, so we don't need to check them here.
2911
2912 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2913 auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
2914 auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
2915
2916 for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
2917 Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
2918 Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
2919
2920 // Return false if the number of enable_if attributes is different.
2921 if (!Cand1A || !Cand2A)
2922 return false;
2923
2924 Cand1ID.clear();
2925 Cand2ID.clear();
2926
2927 (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2928 (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2929
2930 // Return false if any of the enable_if expressions of A and B are
2931 // different.
2932 if (Cand1ID != Cand2ID)
2933 return false;
2934 }
2935 return true;
2936}
2937
2938/// Determine whether the two declarations refer to the same entity.
2939static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2940 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2940, __PRETTY_FUNCTION__))
;
2941
2942 if (X == Y)
2943 return true;
2944
2945 // Must be in the same context.
2946 //
2947 // Note that we can't use DeclContext::Equals here, because the DeclContexts
2948 // could be two different declarations of the same function. (We will fix the
2949 // semantic DC to refer to the primary definition after merging.)
2950 if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
2951 cast<Decl>(Y->getDeclContext()->getRedeclContext())))
2952 return false;
2953
2954 // Two typedefs refer to the same entity if they have the same underlying
2955 // type.
2956 if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
2957 if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2958 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2959 TypedefY->getUnderlyingType());
2960
2961 // Must have the same kind.
2962 if (X->getKind() != Y->getKind())
2963 return false;
2964
2965 // Objective-C classes and protocols with the same name always match.
2966 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2967 return true;
2968
2969 if (isa<ClassTemplateSpecializationDecl>(X)) {
2970 // No need to handle these here: we merge them when adding them to the
2971 // template.
2972 return false;
2973 }
2974
2975 // Compatible tags match.
2976 if (const auto *TagX = dyn_cast<TagDecl>(X)) {
2977 const auto *TagY = cast<TagDecl>(Y);
2978 return (TagX->getTagKind() == TagY->getTagKind()) ||
2979 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2980 TagX->getTagKind() == TTK_Interface) &&
2981 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2982 TagY->getTagKind() == TTK_Interface));
2983 }
2984
2985 // Functions with the same type and linkage match.
2986 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2987 // functions, etc.
2988 if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
2989 const auto *FuncY = cast<FunctionDecl>(Y);
2990 if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2991 const auto *CtorY = cast<CXXConstructorDecl>(Y);
2992 if (CtorX->getInheritedConstructor() &&
2993 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2994 CtorY->getInheritedConstructor().getConstructor()))
2995 return false;
2996 }
2997
2998 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
2999 return false;
3000
3001 // Multiversioned functions with different feature strings are represented
3002 // as separate declarations.
3003 if (FuncX->isMultiVersion()) {
3004 const auto *TAX = FuncX->getAttr<TargetAttr>();
3005 const auto *TAY = FuncY->getAttr<TargetAttr>();
3006 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3006, __PRETTY_FUNCTION__))
;
3007
3008 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3009 return false;
3010 }
3011
3012 ASTContext &C = FuncX->getASTContext();
3013 auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3014 // Map to the first declaration that we've already merged into this one.
3015 // The TSI of redeclarations might not match (due to calling conventions
3016 // being inherited onto the type but not the TSI), but the TSI type of
3017 // the first declaration of the function should match across modules.
3018 FD = FD->getCanonicalDecl();
3019 return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3020 : FD->getType();
3021 };
3022 QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3023 if (!C.hasSameType(XT, YT)) {
3024 // We can get functions with different types on the redecl chain in C++17
3025 // if they have differing exception specifications and at least one of
3026 // the excpetion specs is unresolved.
3027 auto *XFPT = XT->getAs<FunctionProtoType>();
3028 auto *YFPT = YT->getAs<FunctionProtoType>();
3029 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3030 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3031 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
3032 C.hasSameFunctionTypeIgnoringExceptionSpec(XT, YT))
3033 return true;
3034 return false;
3035 }
3036 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3037 hasSameOverloadableAttrs(FuncX, FuncY);
3038 }
3039
3040 // Variables with the same type and linkage match.
3041 if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3042 const auto *VarY = cast<VarDecl>(Y);
3043 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3044 ASTContext &C = VarX->getASTContext();
3045 if (C.hasSameType(VarX->getType(), VarY->getType()))
3046 return true;
3047
3048 // We can get decls with different types on the redecl chain. Eg.
3049 // template <typename T> struct S { static T Var[]; }; // #1
3050 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3051 // Only? happens when completing an incomplete array type. In this case
3052 // when comparing #1 and #2 we should go through their element type.
3053 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3054 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3055 if (!VarXTy || !VarYTy)
3056 return false;
3057 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3058 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3059 }
3060 return false;
3061 }
3062
3063 // Namespaces with the same name and inlinedness match.
3064 if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3065 const auto *NamespaceY = cast<NamespaceDecl>(Y);
3066 return NamespaceX->isInline() == NamespaceY->isInline();
3067 }
3068
3069 // Identical template names and kinds match if their template parameter lists
3070 // and patterns match.
3071 if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3072 const auto *TemplateY = cast<TemplateDecl>(Y);
3073 return isSameEntity(TemplateX->getTemplatedDecl(),
3074 TemplateY->getTemplatedDecl()) &&
3075 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3076 TemplateY->getTemplateParameters());
3077 }
3078
3079 // Fields with the same name and the same type match.
3080 if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3081 const auto *FDY = cast<FieldDecl>(Y);
3082 // FIXME: Also check the bitwidth is odr-equivalent, if any.
3083 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3084 }
3085
3086 // Indirect fields with the same target field match.
3087 if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3088 const auto *IFDY = cast<IndirectFieldDecl>(Y);
3089 return IFDX->getAnonField()->getCanonicalDecl() ==
3090 IFDY->getAnonField()->getCanonicalDecl();
3091 }
3092
3093 // Enumerators with the same name match.
3094 if (isa<EnumConstantDecl>(X))
3095 // FIXME: Also check the value is odr-equivalent.
3096 return true;
3097
3098 // Using shadow declarations with the same target match.
3099 if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3100 const auto *USY = cast<UsingShadowDecl>(Y);
3101 return USX->getTargetDecl() == USY->getTargetDecl();
3102 }
3103
3104 // Using declarations with the same qualifier match. (We already know that
3105 // the name matches.)
3106 if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3107 const auto *UY = cast<UsingDecl>(Y);
3108 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3109 UX->hasTypename() == UY->hasTypename() &&
3110 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3111 }
3112 if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3113 const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3114 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3115 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3116 }
3117 if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3118 return isSameQualifier(
3119 UX->getQualifier(),
3120 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3121
3122 // Namespace alias definitions with the same target match.
3123 if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3124 const auto *NAY = cast<NamespaceAliasDecl>(Y);
3125 return NAX->getNamespace()->Equals(NAY->getNamespace());
3126 }
3127
3128 return false;
3129}
3130
3131/// Find the context in which we should search for previous declarations when
3132/// looking for declarations to merge.
3133DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3134 DeclContext *DC) {
3135 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3136 return ND->getOriginalNamespace();
3137
3138 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3139 // Try to dig out the definition.
3140 auto *DD = RD->DefinitionData;
3141 if (!DD)
3142 DD = RD->getCanonicalDecl()->DefinitionData;
3143
3144 // If there's no definition yet, then DC's definition is added by an update
3145 // record, but we've not yet loaded that update record. In this case, we
3146 // commit to DC being the canonical definition now, and will fix this when
3147 // we load the update record.
3148 if (!DD) {
3149 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3150 RD->setCompleteDefinition(true);
3151 RD->DefinitionData = DD;
3152 RD->getCanonicalDecl()->DefinitionData = DD;
3153
3154 // Track that we did this horrible thing so that we can fix it later.
3155 Reader.PendingFakeDefinitionData.insert(
3156 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3157 }
3158
3159 return DD->Definition;
3160 }
3161
3162 if (auto *ED = dyn_cast<EnumDecl>(DC))
3163 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3164 : nullptr;
3165
3166 // We can see the TU here only if we have no Sema object. In that case,
3167 // there's no TU scope to look in, so using the DC alone is sufficient.
3168 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3169 return TU;
3170
3171 return nullptr;
3172}
3173
3174ASTDeclReader::FindExistingResult::~FindExistingResult() {
3175 // Record that we had a typedef name for linkage whether or not we merge
3176 // with that declaration.
3177 if (TypedefNameForLinkage) {
3178 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3179 Reader.ImportedTypedefNamesForLinkage.insert(
3180 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3181 return;
3182 }
3183
3184 if (!AddResult || Existing)
3185 return;
3186
3187 DeclarationName Name = New->getDeclName();
3188 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3189 if (needsAnonymousDeclarationNumber(New)) {
3190 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3191 AnonymousDeclNumber, New);
3192 } else if (DC->isTranslationUnit() &&
3193 !Reader.getContext().getLangOpts().CPlusPlus) {
3194 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3195 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3196 .push_back(New);
3197 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3198 // Add the declaration to its redeclaration context so later merging
3199 // lookups will find it.
3200 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3201 }
3202}
3203
3204/// Find the declaration that should be merged into, given the declaration found
3205/// by name lookup. If we're merging an anonymous declaration within a typedef,
3206/// we need a matching typedef, and we merge with the type inside it.
3207static NamedDecl *getDeclForMerging(NamedDecl *Found,
3208 bool IsTypedefNameForLinkage) {
3209 if (!IsTypedefNameForLinkage)
3210 return Found;
3211
3212 // If we found a typedef declaration that gives a name to some other
3213 // declaration, then we want that inner declaration. Declarations from
3214 // AST files are handled via ImportedTypedefNamesForLinkage.
3215 if (Found->isFromASTFile())
3216 return nullptr;
3217
3218 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3219 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3220
3221 return nullptr;
3222}
3223
3224/// Find the declaration to use to populate the anonymous declaration table
3225/// for the given lexical DeclContext. We only care about finding local
3226/// definitions of the context; we'll merge imported ones as we go.
3227DeclContext *
3228ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3229 // For classes, we track the definition as we merge.
3230 if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3231 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3232 return DD ? DD->Definition : nullptr;
3233 }
3234
3235 // For anything else, walk its merged redeclarations looking for a definition.
3236 // Note that we can't just call getDefinition here because the redeclaration
3237 // chain isn't wired up.
3238 for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3239 if (auto *FD = dyn_cast<FunctionDecl>(D))
3240 if (FD->isThisDeclarationADefinition())
3241 return FD;
3242 if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3243 if (MD->isThisDeclarationADefinition())
3244 return MD;
3245 }
3246
3247 // No merged definition yet.
3248 return nullptr;
3249}
3250
3251NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3252 DeclContext *DC,
3253 unsigned Index) {
3254 // If the lexical context has been merged, look into the now-canonical
3255 // definition.
3256 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3257
3258 // If we've seen this before, return the canonical declaration.
3259 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3260 if (Index < Previous.size() && Previous[Index])
3261 return Previous[Index];
3262
3263 // If this is the first time, but we have parsed a declaration of the context,
3264 // build the anonymous declaration list from the parsed declaration.
3265 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3266 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3267 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3268 if (Previous.size() == Number)
3269 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3270 else
3271 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3272 });
3273 }
3274
3275 return Index < Previous.size() ? Previous[Index] : nullptr;
3276}
3277
3278void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3279 DeclContext *DC, unsigned Index,
3280 NamedDecl *D) {
3281 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3282
3283 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3284 if (Index >= Previous.size())
3285 Previous.resize(Index + 1);
3286 if (!Previous[Index])
3287 Previous[Index] = D;
3288}
3289
3290ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3291 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3292 : D->getDeclName();
3293
3294 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3295 // Don't bother trying to find unnamed declarations that are in
3296 // unmergeable contexts.
3297 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3298 AnonymousDeclNumber, TypedefNameForLinkage);
3299 Result.suppress();
3300 return Result;
3301 }
3302
3303 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3304 if (TypedefNameForLinkage) {
3305 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3306 std::make_pair(DC, TypedefNameForLinkage));
3307 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3308 if (isSameEntity(It->second, D))
3309 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3310 TypedefNameForLinkage);
3311 // Go on to check in other places in case an existing typedef name
3312 // was not imported.
3313 }
3314
3315 if (needsAnonymousDeclarationNumber(D)) {
3316 // This is an anonymous declaration that we may need to merge. Look it up
3317 // in its context by number.
3318 if (auto *Existing = getAnonymousDeclForMerging(
3319 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3320 if (isSameEntity(Existing, D))
3321 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3322 TypedefNameForLinkage);
3323 } else if (DC->isTranslationUnit() &&
3324 !Reader.getContext().getLangOpts().CPlusPlus) {
3325 IdentifierResolver &IdResolver = Reader.getIdResolver();
3326
3327 // Temporarily consider the identifier to be up-to-date. We don't want to
3328 // cause additional lookups here.
3329 class UpToDateIdentifierRAII {
3330 IdentifierInfo *II;
3331 bool WasOutToDate = false;
3332
3333 public:
3334 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3335 if (II) {
3336 WasOutToDate = II->isOutOfDate();
3337 if (WasOutToDate)
3338 II->setOutOfDate(false);
3339 }
3340 }
3341
3342 ~UpToDateIdentifierRAII() {
3343 if (WasOutToDate)
3344 II->setOutOfDate(true);
3345 }
3346 } UpToDate(Name.getAsIdentifierInfo());
3347
3348 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3349 IEnd = IdResolver.end();
3350 I != IEnd; ++I) {
3351 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3352 if (isSameEntity(Existing, D))
3353 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3354 TypedefNameForLinkage);
3355 }
3356 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3357 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3358 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3359 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3360 if (isSameEntity(Existing, D))
3361 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3362 TypedefNameForLinkage);
3363 }
3364 } else {
3365 // Not in a mergeable context.
3366 return FindExistingResult(Reader);
3367 }
3368
3369 // If this declaration is from a merged context, make a note that we need to
3370 // check that the canonical definition of that context contains the decl.
3371 //
3372 // FIXME: We should do something similar if we merge two definitions of the
3373 // same template specialization into the same CXXRecordDecl.
3374 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3375 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3376 MergedDCIt->second == D->getDeclContext())
3377 Reader.PendingOdrMergeChecks.push_back(D);
3378
3379 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3380 AnonymousDeclNumber, TypedefNameForLinkage);
3381}
3382
3383template<typename DeclT>
3384Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3385 return D->RedeclLink.getLatestNotUpdated();
3386}
3387
3388Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3389 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3389)
;
3390}
3391
3392Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3393 assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3393, __PRETTY_FUNCTION__))
;
3394
3395 switch (D->getKind()) {
3396#define ABSTRACT_DECL(TYPE)
3397#define DECL(TYPE, BASE) \
3398 case Decl::TYPE: \
3399 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3400#include "clang/AST/DeclNodes.inc"
3401 }
3402 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3402)
;
3403}
3404
3405Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3406 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3407}
3408
3409template<typename DeclT>
3410void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3411 Redeclarable<DeclT> *D,
3412 Decl *Previous, Decl *Canon) {
3413 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3414 D->First = cast<DeclT>(Previous)->First;
3415}
3416
3417namespace clang {
3418
3419template<>
3420void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3421 Redeclarable<VarDecl> *D,
3422 Decl *Previous, Decl *Canon) {
3423 auto *VD = static_cast<VarDecl *>(D);
3424 auto *PrevVD = cast<VarDecl>(Previous);
3425 D->RedeclLink.setPrevious(PrevVD);
3426 D->First = PrevVD->First;
3427
3428 // We should keep at most one definition on the chain.
3429 // FIXME: Cache the definition once we've found it. Building a chain with
3430 // N definitions currently takes O(N^2) time here.
3431 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3432 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3433 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3434 Reader.mergeDefinitionVisibility(CurD, VD);
3435 VD->demoteThisDefinitionToDeclaration();
3436 break;
3437 }
3438 }
3439 }
3440}
3441
3442static bool isUndeducedReturnType(QualType T) {
3443 auto *DT = T->getContainedDeducedType();
3444 return DT && !DT->isDeduced();
3445}
3446
3447template<>
3448void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3449 Redeclarable<FunctionDecl> *D,
3450 Decl *Previous, Decl *Canon) {
3451 auto *FD = static_cast<FunctionDecl *>(D);
3452 auto *PrevFD = cast<FunctionDecl>(Previous);
3453
3454 FD->RedeclLink.setPrevious(PrevFD);
3455 FD->First = PrevFD->First;
3456
3457 // If the previous declaration is an inline function declaration, then this
3458 // declaration is too.
3459 if (PrevFD->isInlined() != FD->isInlined()) {
3460 // FIXME: [dcl.fct.spec]p4:
3461 // If a function with external linkage is declared inline in one
3462 // translation unit, it shall be declared inline in all translation
3463 // units in which it appears.
3464 //
3465 // Be careful of this case:
3466 //
3467 // module A:
3468 // template<typename T> struct X { void f(); };
3469 // template<typename T> inline void X<T>::f() {}
3470 //
3471 // module B instantiates the declaration of X<int>::f
3472 // module C instantiates the definition of X<int>::f
3473 //
3474 // If module B and C are merged, we do not have a violation of this rule.
3475 FD->setImplicitlyInline(true);
3476 }
3477
3478 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3479 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3480 if (FPT && PrevFPT) {
3481 // If we need to propagate an exception specification along the redecl
3482 // chain, make a note of that so that we can do so later.
3483 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3484 bool WasUnresolved =
3485 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3486 if (IsUnresolved != WasUnresolved)
3487 Reader.PendingExceptionSpecUpdates.insert(
3488 {Canon, IsUnresolved ? PrevFD : FD});
3489
3490 // If we need to propagate a deduced return type along the redecl chain,
3491 // make a note of that so that we can do it later.
3492 bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3493 bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3494 if (IsUndeduced != WasUndeduced)
3495 Reader.PendingDeducedTypeUpdates.insert(
3496 {cast<FunctionDecl>(Canon),
3497 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3498 }
3499}
3500
3501} // namespace clang
3502
3503void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3504 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3504)
;
3505}
3506
3507/// Inherit the default template argument from \p From to \p To. Returns
3508/// \c false if there is no default template for \p From.
3509template <typename ParmDecl>
3510static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3511 Decl *ToD) {
3512 auto *To = cast<ParmDecl>(ToD);
3513 if (!From->hasDefaultArgument())
3514 return false;
3515 To->setInheritedDefaultArgument(Context, From);
3516 return true;
3517}
3518
3519static void inheritDefaultTemplateArguments(ASTContext &Context,
3520 TemplateDecl *From,
3521 TemplateDecl *To) {
3522 auto *FromTP = From->getTemplateParameters();
3523 auto *ToTP = To->getTemplateParameters();
3524 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3524, __PRETTY_FUNCTION__))
;
3525
3526 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3527 NamedDecl *FromParam = FromTP->getParam(I);
3528 NamedDecl *ToParam = ToTP->getParam(I);
3529
3530 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3531 inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3532 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3533 inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3534 else
3535 inheritDefaultTemplateArgument(
3536 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3537 }
3538}
3539
3540void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3541 Decl *Previous, Decl *Canon) {
3542 assert(D && Previous)((D && Previous) ? static_cast<void> (0) : __assert_fail
("D && Previous", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3542, __PRETTY_FUNCTION__))
;
3543
3544 switch (D->getKind()) {
3545#define ABSTRACT_DECL(TYPE)
3546#define DECL(TYPE, BASE) \
3547 case Decl::TYPE: \
3548 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3549 break;
3550#include "clang/AST/DeclNodes.inc"
3551 }
3552
3553 // If the declaration was visible in one module, a redeclaration of it in
3554 // another module remains visible even if it wouldn't be visible by itself.
3555 //
3556 // FIXME: In this case, the declaration should only be visible if a module
3557 // that makes it visible has been imported.
3558 D->IdentifierNamespace |=
3559 Previous->IdentifierNamespace &
3560 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3561
3562 // If the declaration declares a template, it may inherit default arguments
3563 // from the previous declaration.
3564 if (auto *TD = dyn_cast<TemplateDecl>(D))
3565 inheritDefaultTemplateArguments(Reader.getContext(),
3566 cast<TemplateDecl>(Previous), TD);
3567}
3568
3569template<typename DeclT>
3570void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3571 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3572}
3573
3574void ASTDeclReader::attachLatestDeclImpl(...) {
3575 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3575)
;
3576}
3577
3578void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3579 assert(D && Latest)((D && Latest) ? static_cast<void> (0) : __assert_fail
("D && Latest", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3579, __PRETTY_FUNCTION__))
;
3580
3581 switch (D->getKind()) {
3582#define ABSTRACT_DECL(TYPE)
3583#define DECL(TYPE, BASE) \
3584 case Decl::TYPE: \
3585 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3586 break;
3587#include "clang/AST/DeclNodes.inc"
3588 }
3589}
3590
3591template<typename DeclT>
3592void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3593 D->RedeclLink.markIncomplete();
3594}
3595
3596void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3597 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3597)
;
3598}
3599
3600void ASTReader::markIncompleteDeclChain(Decl *D) {
3601 switch (D->getKind()) {
3602#define ABSTRACT_DECL(TYPE)
3603#define DECL(TYPE, BASE) \
3604 case Decl::TYPE: \
3605 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3606 break;
3607#include "clang/AST/DeclNodes.inc"
3608 }
3609}
3610
3611/// Read the declaration at the given offset from the AST file.
3612Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3613 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3614 SourceLocation DeclLoc;
3615 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3616 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3617 // Keep track of where we are in the stream, then jump back there
3618 // after reading this declaration.
3619 SavedStreamPosition SavedPosition(DeclsCursor);
3620
3621 ReadingKindTracker ReadingKind(Read_Decl, *this);
3622
3623 // Note that we are loading a declaration record.
3624 Deserializing ADecl(this);
3625
3626 auto Fail = [](const char *what, llvm::Error &&Err) {
3627 llvm::report_fatal_error(Twine("ASTReader::ReadDeclRecord failed ") + what +
3628 ": " + toString(std::move(Err)));
3629 };
3630
3631 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(Loc.Offset))
3632 Fail("jumping", std::move(JumpFailed));
3633 ASTRecordReader Record(*this, *Loc.F);
3634 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3635 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3636 if (!MaybeCode)
3637 Fail("reading code", MaybeCode.takeError());
3638 unsigned Code = MaybeCode.get();
3639
3640 ASTContext &Context = getContext();
3641 Decl *D = nullptr;
3642 Expected<unsigned> MaybeDeclCode = Record.readRecord(DeclsCursor, Code);
3643 if (!MaybeDeclCode)
3644 llvm::report_fatal_error(
3645 "ASTReader::ReadDeclRecord failed reading decl code: " +
3646 toString(MaybeDeclCode.takeError()));
3647 switch ((DeclCode)MaybeDeclCode.get()) {
3648 case DECL_CONTEXT_LEXICAL:
3649 case DECL_CONTEXT_VISIBLE:
3650 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord")::llvm::llvm_unreachable_internal("Record cannot be de-serialized with ReadDeclRecord"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3650)
;
3651 case DECL_TYPEDEF:
3652 D = TypedefDecl::CreateDeserialized(Context, ID);
3653 break;
3654 case DECL_TYPEALIAS:
3655 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3656 break;
3657 case DECL_ENUM:
3658 D = EnumDecl::CreateDeserialized(Context, ID);
3659 break;
3660 case DECL_RECORD:
3661 D = RecordDecl::CreateDeserialized(Context, ID);
3662 break;
3663 case DECL_ENUM_CONSTANT:
3664 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3665 break;
3666 case DECL_FUNCTION:
3667 D = FunctionDecl::CreateDeserialized(Context, ID);
3668 break;
3669 case DECL_LINKAGE_SPEC:
3670 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3671 break;
3672 case DECL_EXPORT:
3673 D = ExportDecl::CreateDeserialized(Context, ID);
3674 break;
3675 case DECL_LABEL:
3676 D = LabelDecl::CreateDeserialized(Context, ID);
3677 break;
3678 case DECL_NAMESPACE:
3679 D = NamespaceDecl::CreateDeserialized(Context, ID);
3680 break;
3681 case DECL_NAMESPACE_ALIAS:
3682 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3683 break;
3684 case DECL_USING:
3685 D = UsingDecl::CreateDeserialized(Context, ID);
3686 break;
3687 case DECL_USING_PACK:
3688 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3689 break;
3690 case DECL_USING_SHADOW:
3691 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3692 break;
3693 case DECL_CONSTRUCTOR_USING_SHADOW:
3694 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3695 break;
3696 case DECL_USING_DIRECTIVE:
3697 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3698 break;
3699 case DECL_UNRESOLVED_USING_VALUE:
3700 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3701 break;
3702 case DECL_UNRESOLVED_USING_TYPENAME:
3703 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3704 break;
3705 case DECL_CXX_RECORD:
3706 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3707 break;
3708 case DECL_CXX_DEDUCTION_GUIDE:
3709 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3710 break;
3711 case DECL_CXX_METHOD:
3712 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3713 break;
3714 case DECL_CXX_CONSTRUCTOR:
3715 D = CXXConstructorDecl::CreateDeserialized(Context, ID, Record.readInt());
3716 break;
3717 case DECL_CXX_DESTRUCTOR:
3718 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3719 break;
3720 case DECL_CXX_CONVERSION:
3721 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3722 break;
3723 case DECL_ACCESS_SPEC:
3724 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3725 break;
3726 case DECL_FRIEND:
3727 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3728 break;
3729 case DECL_FRIEND_TEMPLATE:
3730 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3731 break;
3732 case DECL_CLASS_TEMPLATE:
3733 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3734 break;
3735 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3736 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3737 break;
3738 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3739 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3740 break;
3741 case DECL_VAR_TEMPLATE:
3742 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3743 break;
3744 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3745 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3746 break;
3747 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3748 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3749 break;
3750 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3751 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3752 break;
3753 case DECL_FUNCTION_TEMPLATE:
3754 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3755 break;
3756 case DECL_TEMPLATE_TYPE_PARM:
3757 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3758 break;
3759 case DECL_NON_TYPE_TEMPLATE_PARM:
3760 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3761 break;
3762 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3763 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3764 Record.readInt());
3765 break;
3766 case DECL_TEMPLATE_TEMPLATE_PARM:
3767 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3768 break;
3769 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3770 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3771 Record.readInt());
3772 break;
3773 case DECL_TYPE_ALIAS_TEMPLATE:
3774 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3775 break;
3776 case DECL_CONCEPT:
3777 D = ConceptDecl::CreateDeserialized(Context, ID);
3778 break;
3779 case DECL_STATIC_ASSERT:
3780 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3781 break;
3782 case DECL_OBJC_METHOD:
3783 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3784 break;
3785 case DECL_OBJC_INTERFACE:
3786 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3787 break;
3788 case DECL_OBJC_IVAR:
3789 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3790 break;
3791 case DECL_OBJC_PROTOCOL:
3792 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3793 break;
3794 case DECL_OBJC_AT_DEFS_FIELD:
3795 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3796 break;
3797 case DECL_OBJC_CATEGORY:
3798 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3799 break;
3800 case DECL_OBJC_CATEGORY_IMPL:
3801 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3802 break;
3803 case DECL_OBJC_IMPLEMENTATION:
3804 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3805 break;
3806 case DECL_OBJC_COMPATIBLE_ALIAS:
3807 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3808 break;
3809 case DECL_OBJC_PROPERTY:
3810 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3811 break;
3812 case DECL_OBJC_PROPERTY_IMPL:
3813 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3814 break;
3815 case DECL_FIELD:
3816 D = FieldDecl::CreateDeserialized(Context, ID);
3817 break;
3818 case DECL_INDIRECTFIELD:
3819 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3820 break;
3821 case DECL_VAR:
3822 D = VarDecl::CreateDeserialized(Context, ID);
3823 break;
3824 case DECL_IMPLICIT_PARAM:
3825 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3826 break;
3827 case DECL_PARM_VAR:
3828 D = ParmVarDecl::CreateDeserialized(Context, ID);
3829 break;
3830 case DECL_DECOMPOSITION:
3831 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3832 break;
3833 case DECL_BINDING:
3834 D = BindingDecl::CreateDeserialized(Context, ID);
3835 break;
3836 case DECL_FILE_SCOPE_ASM:
3837 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3838 break;
3839 case DECL_BLOCK:
3840 D = BlockDecl::CreateDeserialized(Context, ID);
3841 break;
3842 case DECL_MS_PROPERTY:
3843 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3844 break;
3845 case DECL_CAPTURED:
3846 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3847 break;
3848 case DECL_CXX_BASE_SPECIFIERS:
3849 Error("attempt to read a C++ base-specifier record as a declaration");
3850 return nullptr;
3851 case DECL_CXX_CTOR_INITIALIZERS:
3852 Error("attempt to read a C++ ctor initializer record as a declaration");
3853 return nullptr;
3854 case DECL_IMPORT:
3855 // Note: last entry of the ImportDecl record is the number of stored source
3856 // locations.
3857 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3858 break;
3859 case DECL_OMP_THREADPRIVATE:
3860 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3861 break;
3862 case DECL_OMP_ALLOCATE: {
3863 unsigned NumVars = Record.readInt();
3864 unsigned NumClauses = Record.readInt();
3865 D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
3866 break;
3867 }
3868 case DECL_OMP_REQUIRES:
3869 D = OMPRequiresDecl::CreateDeserialized(Context, ID, Record.readInt());
3870 break;
3871 case DECL_OMP_DECLARE_REDUCTION:
3872 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3873 break;
3874 case DECL_OMP_DECLARE_MAPPER:
3875 D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, Record.readInt());
3876 break;
3877 case DECL_OMP_CAPTUREDEXPR:
3878 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3879 break;
3880 case DECL_PRAGMA_COMMENT:
3881 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3882 break;
3883 case DECL_PRAGMA_DETECT_MISMATCH:
3884 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3885 Record.readInt());
3886 break;
3887 case DECL_EMPTY:
3888 D = EmptyDecl::CreateDeserialized(Context, ID);
3889 break;
3890 case DECL_OBJC_TYPE_PARAM:
3891 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3892 break;
3893 }
3894
3895 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3895, __PRETTY_FUNCTION__))
;
3896 LoadedDecl(Index, D);
3897 // Set the DeclContext before doing any deserialization, to make sure internal
3898 // calls to Decl::getASTContext() by Decl's methods will find the
3899 // TranslationUnitDecl without crashing.
3900 D->setDeclContext(Context.getTranslationUnitDecl());
3901 Reader.Visit(D);
3902
3903 // If this declaration is also a declaration context, get the
3904 // offsets for its tables of lexical and visible declarations.
3905 if (auto *DC = dyn_cast<DeclContext>(D)) {
3906 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3907 if (Offsets.first &&
3908 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3909 return nullptr;
3910 if (Offsets.second &&
3911 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3912 return nullptr;
3913 }
3914 assert(Record.getIdx() == Record.size())((Record.getIdx() == Record.size()) ? static_cast<void>
(0) : __assert_fail ("Record.getIdx() == Record.size()", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3914, __PRETTY_FUNCTION__))
;
3915
3916 // Load any relevant update records.
3917 PendingUpdateRecords.push_back(
3918 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3919
3920 // Load the categories after recursive loading is finished.
3921 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3922 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3923 // we put the Decl in PendingDefinitions so we can pull the categories here.
3924 if (Class->isThisDeclarationADefinition() ||
3925 PendingDefinitions.count(Class))
3926 loadObjCCategories(ID, Class);
3927
3928 // If we have deserialized a declaration that has a definition the
3929 // AST consumer might need to know about, queue it.
3930 // We don't pass it to the consumer immediately because we may be in recursive
3931 // loading, and some declarations may still be initializing.
3932 PotentiallyInterestingDecls.push_back(
3933 InterestingDecl(D, Reader.hasPendingBody()));
3934
3935 return D;
3936}
3937
3938void ASTReader::PassInterestingDeclsToConsumer() {
3939 assert(Consumer)((Consumer) ? static_cast<void> (0) : __assert_fail ("Consumer"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3939, __PRETTY_FUNCTION__))
;
3940
3941 if (PassingDeclsToConsumer)
3942 return;
3943
3944 // Guard variable to avoid recursively redoing the process of passing
3945 // decls to consumer.
3946 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3947 true);
3948
3949 // Ensure that we've loaded all potentially-interesting declarations
3950 // that need to be eagerly loaded.
3951 for (auto ID : EagerlyDeserializedDecls)
3952 GetDecl(ID);
3953 EagerlyDeserializedDecls.clear();
3954
3955 while (!PotentiallyInterestingDecls.empty()) {
3956 InterestingDecl D = PotentiallyInterestingDecls.front();
3957 PotentiallyInterestingDecls.pop_front();
3958 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3959 PassInterestingDeclToConsumer(D.getDecl());
3960 }
3961}
3962
3963void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3964 // The declaration may have been modified by files later in the chain.
3965 // If this is the case, read the record containing the updates from each file
3966 // and pass it to ASTDeclReader to make the modifications.
3967 serialization::GlobalDeclID ID = Record.ID;
3968 Decl *D = Record.D;
3969 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3970 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3971
3972 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3973
3974 if (UpdI != DeclUpdateOffsets.end()) {
3975 auto UpdateOffsets = std::move(UpdI->second);
3976 DeclUpdateOffsets.erase(UpdI);
3977
3978 // Check if this decl was interesting to the consumer. If we just loaded
3979 // the declaration, then we know it was interesting and we skip the call
3980 // to isConsumerInterestedIn because it is unsafe to call in the
3981 // current ASTReader state.
3982 bool WasInteresting =
3983 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3984 for (auto &FileAndOffset : UpdateOffsets) {
3985 ModuleFile *F = FileAndOffset.first;
3986 uint64_t Offset = FileAndOffset.second;
3987 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3988 SavedStreamPosition SavedPosition(Cursor);
3989 if (llvm::Error JumpFailed = Cursor.JumpToBit(Offset))
3990 // FIXME don't do a fatal error.
3991 llvm::report_fatal_error(
3992 "ASTReader::loadDeclUpdateRecords failed jumping: " +
3993 toString(std::move(JumpFailed)));
3994 Expected<unsigned> MaybeCode = Cursor.ReadCode();
3995 if (!MaybeCode)
3996 llvm::report_fatal_error(
3997 "ASTReader::loadDeclUpdateRecords failed reading code: " +
3998 toString(MaybeCode.takeError()));
3999 unsigned Code = MaybeCode.get();
4000 ASTRecordReader Record(*this, *F);
4001 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, Code))
4002 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4003, __PRETTY_FUNCTION__))
4003 "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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4003, __PRETTY_FUNCTION__))
;
4004 else
4005 llvm::report_fatal_error(
4006 "ASTReader::loadDeclUpdateRecords failed reading rec code: " +
4007 toString(MaybeCode.takeError()));
4008
4009 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4010 SourceLocation());
4011 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4012
4013 // We might have made this declaration interesting. If so, remember that
4014 // we need to hand it off to the consumer.
4015 if (!WasInteresting &&
4016 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4017 PotentiallyInterestingDecls.push_back(
4018 InterestingDecl(D, Reader.hasPendingBody()));
4019 WasInteresting = true;
4020 }
4021 }
4022 }
4023 // Add the lazy specializations to the template.
4024 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4026, __PRETTY_FUNCTION__))
4025 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4026, __PRETTY_FUNCTION__))
4026 "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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4026, __PRETTY_FUNCTION__))
;
4027 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4028 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4029 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4030 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4031 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4032 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4033 PendingLazySpecializationIDs.clear();
4034
4035 // Load the pending visible updates for this decl context, if it has any.
4036 auto I = PendingVisibleUpdates.find(ID);
4037 if (I != PendingVisibleUpdates.end()) {
4038 auto VisibleUpdates = std::move(I->second);
4039 PendingVisibleUpdates.erase(I);
4040
4041 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4042 for (const auto &Update : VisibleUpdates)
4043 Lookups[DC].Table.add(
4044 Update.Mod, Update.Data,
4045 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4046 DC->setHasExternalVisibleStorage(true);
4047 }
4048}
4049
4050void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4051 // Attach FirstLocal to the end of the decl chain.
4052 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4053 if (FirstLocal != CanonDecl) {
4054 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4055 ASTDeclReader::attachPreviousDecl(
4056 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4057 CanonDecl);
4058 }
4059
4060 if (!LocalOffset) {
4061 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4062 return;
4063 }
4064
4065 // Load the list of other redeclarations from this module file.
4066 ModuleFile *M = getOwningModuleFile(FirstLocal);
4067 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4067, __PRETTY_FUNCTION__))
;
4068
4069 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4070 SavedStreamPosition SavedPosition(Cursor);
4071 if (llvm::Error JumpFailed = Cursor.JumpToBit(LocalOffset))
4072 llvm::report_fatal_error(
4073 "ASTReader::loadPendingDeclChain failed jumping: " +
4074 toString(std::move(JumpFailed)));
4075
4076 RecordData Record;
4077 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4078 if (!MaybeCode)
4079 llvm::report_fatal_error(
4080 "ASTReader::loadPendingDeclChain failed reading code: " +
4081 toString(MaybeCode.takeError()));
4082 unsigned Code = MaybeCode.get();
4083 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record))
4084 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4085, __PRETTY_FUNCTION__))
4085 "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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4085, __PRETTY_FUNCTION__))
;
4086 else
4087 llvm::report_fatal_error(
4088 "ASTReader::loadPendingDeclChain failed reading rec code: " +
4089 toString(MaybeCode.takeError()));
4090
4091 // FIXME: We have several different dispatches on decl kind here; maybe
4092 // we should instead generate one loop per kind and dispatch up-front?
4093 Decl *MostRecent = FirstLocal;
4094 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4095 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4096 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4097 MostRecent = D;
4098 }
4099 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4100}
4101
4102namespace {
4103
4104 /// Given an ObjC interface, goes through the modules and links to the
4105 /// interface all the categories for it.
4106 class ObjCCategoriesVisitor {
4107 ASTReader &Reader;
4108 ObjCInterfaceDecl *Interface;
4109 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4110 ObjCCategoryDecl *Tail = nullptr;
4111 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4112 serialization::GlobalDeclID InterfaceID;
4113 unsigned PreviousGeneration;
4114
4115 void add(ObjCCategoryDecl *Cat) {
4116 // Only process each category once.
4117 if (!Deserialized.erase(Cat))
13
Assuming the condition is false
14
Taking false branch
4118 return;
4119
4120 // Check for duplicate categories.
4121 if (Cat->getDeclName()) {
15
Called C++ object pointer is null
4122 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4123 if (Existing &&
4124 Reader.getOwningModuleFile(Existing)
4125 != Reader.getOwningModuleFile(Cat)) {
4126 // FIXME: We should not warn for duplicates in diamond:
4127 //
4128 // MT //
4129 // / \ //
4130 // ML MR //
4131 // \ / //
4132 // MB //
4133 //
4134 // If there are duplicates in ML/MR, there will be warning when
4135 // creating MB *and* when importing MB. We should not warn when
4136 // importing.
4137 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4138 << Interface->getDeclName() << Cat->getDeclName();
4139 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4140 } else if (!Existing) {
4141 // Record this category.
4142 Existing = Cat;
4143 }
4144 }
4145
4146 // Add this category to the end of the chain.
4147 if (Tail)
4148 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4149 else
4150 Interface->setCategoryListRaw(Cat);
4151 Tail = Cat;
4152 }
4153
4154 public:
4155 ObjCCategoriesVisitor(ASTReader &Reader,
4156 ObjCInterfaceDecl *Interface,
4157 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4158 serialization::GlobalDeclID InterfaceID,
4159 unsigned PreviousGeneration)
4160 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4161 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4162 // Populate the name -> category map with the set of known categories.
4163 for (auto *Cat : Interface->known_categories()) {
4164 if (Cat->getDeclName())
4165 NameCategoryMap[Cat->getDeclName()] = Cat;
4166
4167 // Keep track of the tail of the category list.
4168 Tail = Cat;
4169 }
4170 }
4171
4172 bool operator()(ModuleFile &M) {
4173 // If we've loaded all of the category information we care about from
4174 // this module file, we're done.
4175 if (M.Generation <= PreviousGeneration)
1
Assuming field 'Generation' is > field 'PreviousGeneration'
2
Taking false branch
4176 return true;
4177
4178 // Map global ID of the definition down to the local ID used in this
4179 // module file. If there is no such mapping, we'll find nothing here
4180 // (or in any module it imports).
4181 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4182 if (!LocalID)
3
Assuming 'LocalID' is not equal to 0
4
Taking false branch
4183 return true;
4184
4185 // Perform a binary search to find the local redeclarations for this
4186 // declaration (if any).
4187 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4188 const ObjCCategoriesInfo *Result
4189 = std::lower_bound(M.ObjCCategoriesMap,
4190 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4191 Compare);
4192 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
5
Assuming the condition is false
7
Taking false branch
4193 Result->DefinitionID != LocalID) {
6
Assuming 'LocalID' is equal to field 'DefinitionID'
4194 // We didn't find anything. If the class definition is in this module
4195 // file, then the module files it depends on cannot have any categories,
4196 // so suppress further lookup.
4197 return Reader.isDeclIDFromModule(InterfaceID, M);
4198 }
4199
4200 // We found something. Dig out all of the categories.
4201 unsigned Offset = Result->Offset;
4202 unsigned N = M.ObjCCategories[Offset];
4203 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4204 for (unsigned I = 0; I != N; ++I)
8
Assuming 'I' is not equal to 'N'
9
Loop condition is true. Entering loop body
4205 add(cast_or_null<ObjCCategoryDecl>(
10
Assuming null pointer is passed into cast
11
Passing null pointer value via 1st parameter 'Cat'
12
Calling 'ObjCCategoriesVisitor::add'
4206 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4207 return true;
4208 }
4209 };
4210
4211} // namespace
4212
4213void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4214 ObjCInterfaceDecl *D,
4215 unsigned PreviousGeneration) {
4216 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4217 PreviousGeneration);
4218 ModuleMgr.visit(Visitor);
4219}
4220
4221template<typename DeclT, typename Fn>
4222static void forAllLaterRedecls(DeclT *D, Fn F) {
4223 F(D);
4224
4225 // Check whether we've already merged D into its redeclaration chain.
4226 // MostRecent may or may not be nullptr if D has not been merged. If
4227 // not, walk the merged redecl chain and see if it's there.
4228 auto *MostRecent = D->getMostRecentDecl();
4229 bool Found = false;
4230 for (auto *Redecl = MostRecent; Redecl && !Found;
4231 Redecl = Redecl->getPreviousDecl())
4232 Found = (Redecl == D);
4233
4234 // If this declaration is merged, apply the functor to all later decls.
4235 if (Found) {
4236 for (auto *Redecl = MostRecent; Redecl != D;
4237 Redecl = Redecl->getPreviousDecl())
4238 F(Redecl);
4239 }
4240}
4241
4242void ASTDeclReader::UpdateDecl(Decl *D,
4243 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4244 while (Record.getIdx() < Record.size()) {
4245 switch ((DeclUpdateKind)Record.readInt()) {
4246 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4247 auto *RD = cast<CXXRecordDecl>(D);
4248 // FIXME: If we also have an update record for instantiating the
4249 // definition of D, we need that to happen before we get here.
4250 Decl *MD = Record.readDecl();
4251 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4251, __PRETTY_FUNCTION__))
;
4252 // FIXME: We should call addHiddenDecl instead, to add the member
4253 // to its DeclContext.
4254 RD->addedMember(MD);
4255 break;
4256 }
4257
4258 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4259 // It will be added to the template's lazy specialization set.
4260 PendingLazySpecializationIDs.push_back(ReadDeclID());
4261 break;
4262
4263 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4264 auto *Anon = ReadDeclAs<NamespaceDecl>();
4265
4266 // Each module has its own anonymous namespace, which is disjoint from
4267 // any other module's anonymous namespaces, so don't attach the anonymous
4268 // namespace at all.
4269 if (!Record.isModule()) {
4270 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4271 TU->setAnonymousNamespace(Anon);
4272 else
4273 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4274 }
4275 break;
4276 }
4277
4278 case UPD_CXX_ADDED_VAR_DEFINITION: {
4279 auto *VD = cast<VarDecl>(D);
4280 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4281 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4282 uint64_t Val = Record.readInt();
4283 if (Val && !VD->getInit()) {
4284 VD->setInit(Record.readExpr());
4285 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4286 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4287 Eval->CheckedICE = true;
4288 Eval->IsICE = Val == 3;
4289 }
4290 }
4291 break;
4292 }
4293
4294 case UPD_CXX_POINT_OF_INSTANTIATION: {
4295 SourceLocation POI = Record.readSourceLocation();
4296 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4297 VTSD->setPointOfInstantiation(POI);
4298 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4299 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4300 } else {
4301 auto *FD = cast<FunctionDecl>(D);
4302 if (auto *FTSInfo = FD->TemplateOrSpecialization
4303 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4304 FTSInfo->setPointOfInstantiation(POI);
4305 else
4306 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4307 ->setPointOfInstantiation(POI);
4308 }
4309 break;
4310 }
4311
4312 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4313 auto *Param = cast<ParmVarDecl>(D);
4314
4315 // We have to read the default argument regardless of whether we use it
4316 // so that hypothetical further update records aren't messed up.
4317 // TODO: Add a function to skip over the next expr record.
4318 auto *DefaultArg = Record.readExpr();
4319
4320 // Only apply the update if the parameter still has an uninstantiated
4321 // default argument.
4322 if (Param->hasUninstantiatedDefaultArg())
4323 Param->setDefaultArg(DefaultArg);
4324 break;
4325 }
4326
4327 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4328 auto *FD = cast<FieldDecl>(D);
4329 auto *DefaultInit = Record.readExpr();
4330
4331 // Only apply the update if the field still has an uninstantiated
4332 // default member initializer.
4333 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4334 if (DefaultInit)
4335 FD->setInClassInitializer(DefaultInit);
4336 else
4337 // Instantiation failed. We can get here if we serialized an AST for
4338 // an invalid program.
4339 FD->removeInClassInitializer();
4340 }
4341 break;
4342 }
4343
4344 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4345 auto *FD = cast<FunctionDecl>(D);
4346 if (Reader.PendingBodies[FD]) {
4347 // FIXME: Maybe check for ODR violations.
4348 // It's safe to stop now because this update record is always last.
4349 return;
4350 }
4351
4352 if (Record.readInt()) {
4353 // Maintain AST consistency: any later redeclarations of this function
4354 // are inline if this one is. (We might have merged another declaration
4355 // into this one.)
4356 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4357 FD->setImplicitlyInline();
4358 });
4359 }
4360 FD->setInnerLocStart(ReadSourceLocation());
4361 ReadFunctionDefinition(FD);
4362 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-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4362, __PRETTY_FUNCTION__))
;
4363 break;
4364 }
4365
4366 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4367 auto *RD = cast<CXXRecordDecl>(D);
4368 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4369 bool HadRealDefinition =
4370 OldDD && (OldDD->Definition != RD ||
4371 !Reader.PendingFakeDefinitionData.count(OldDD));
4372 RD->setParamDestroyedInCallee(Record.readInt());
4373 RD->setArgPassingRestrictions(
4374 (RecordDecl::ArgPassingKind)Record.readInt());
4375 ReadCXXRecordDefinition(RD, /*Update*/true);
4376
4377 // Visible update is handled separately.
4378 uint64_t LexicalOffset = ReadLocalOffset();
4379 if (!HadRealDefinition && LexicalOffset) {
4380 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4381 Reader.PendingFakeDefinitionData.erase(OldDD);
4382 }
4383
4384 auto TSK = (TemplateSpecializationKind)Record.readInt();
4385 SourceLocation POI = ReadSourceLocation();
4386 if (MemberSpecializationInfo *MSInfo =
4387 RD->getMemberSpecializationInfo()) {
4388 MSInfo->setTemplateSpecializationKind(TSK);
4389 MSInfo->setPointOfInstantiation(POI);
4390 } else {
4391 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4392 Spec->setTemplateSpecializationKind(TSK);
4393 Spec->setPointOfInstantiation(POI);
4394
4395 if (Record.readInt()) {
4396 auto *PartialSpec =
4397 ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4398 SmallVector<TemplateArgument, 8> TemplArgs;
4399 Record.readTemplateArgumentList(TemplArgs);
4400 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4401 Reader.getContext(), TemplArgs);
4402
4403 // FIXME: If we already have a partial specialization set,
4404 // check that it matches.
4405 if (!Spec->getSpecializedTemplateOrPartial()
4406 .is<ClassTemplatePartialSpecializationDecl *>())
4407 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4408 }
4409 }
4410
4411 RD->setTagKind((TagTypeKind)Record.readInt());
4412 RD->setLocation(ReadSourceLocation());
4413 RD->setLocStart(ReadSourceLocation());
4414 RD->setBraceRange(ReadSourceRange());
4415
4416 if (Record.readInt()) {
4417 AttrVec Attrs;
4418 Record.readAttributes(Attrs);
4419 // If the declaration already has attributes, we assume that some other
4420 // AST file already loaded them.
4421 if (!D->hasAttrs())
4422 D->setAttrsImpl(Attrs, Reader.getContext());
4423 }
4424 break;
4425 }
4426
4427 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4428 // Set the 'operator delete' directly to avoid emitting another update
4429 // record.
4430 auto *Del = ReadDeclAs<FunctionDecl>();
4431 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4432 auto *ThisArg = Record.readExpr();
4433 // FIXME: Check consistency if we have an old and new operator delete.
4434 if (!First->OperatorDelete) {
4435 First->OperatorDelete = Del;
4436 First->OperatorDeleteThisArg = ThisArg;
4437 }
4438 break;
4439 }
4440
4441 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4442 FunctionProtoType::ExceptionSpecInfo ESI;
4443 SmallVector<QualType, 8> ExceptionStorage;
4444 Record.readExceptionSpec(ExceptionStorage, ESI);
4445
4446 // Update this declaration's exception specification, if needed.
4447 auto *FD = cast<FunctionDecl>(D);
4448 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4449 // FIXME: If the exception specification is already present, check that it
4450 // matches.
4451 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4452 FD->setType(Reader.getContext().getFunctionType(
4453 FPT->getReturnType(), FPT->getParamTypes(),
4454 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4455
4456 // When we get to the end of deserializing, see if there are other decls
4457 // that we need to propagate this exception specification onto.
4458 Reader.PendingExceptionSpecUpdates.insert(
4459 std::make_pair(FD->getCanonicalDecl(), FD));
4460 }
4461 break;
4462 }
4463
4464 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4465 auto *FD = cast<FunctionDecl>(D);
4466 QualType DeducedResultType = Record.readType();
4467 Reader.PendingDeducedTypeUpdates.insert(
4468 {FD->getCanonicalDecl(), DeducedResultType});
4469 break;
4470 }
4471
4472 case UPD_DECL_MARKED_USED:
4473 // Maintain AST consistency: any later redeclarations are used too.
4474 D->markUsed(Reader.getContext());
4475 break;
4476
4477 case UPD_MANGLING_NUMBER:
4478 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4479 Record.readInt());
4480 break;
4481
4482 case UPD_STATIC_LOCAL_NUMBER:
4483 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4484 Record.readInt());
4485 break;
4486
4487 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4488 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
4489 Reader.getContext(), ReadSourceRange(),
4490 AttributeCommonInfo::AS_Pragma));
4491 break;
4492
4493 case UPD_DECL_MARKED_OPENMP_ALLOCATE: {
4494 auto AllocatorKind =
4495 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4496 Expr *Allocator = Record.readExpr();
4497 SourceRange SR = ReadSourceRange();
4498 D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4499 Reader.getContext(), AllocatorKind, Allocator, SR,
4500 AttributeCommonInfo::AS_Pragma));
4501 break;
4502 }
4503
4504 case UPD_DECL_EXPORTED: {
4505 unsigned SubmoduleID = readSubmoduleID();
4506 auto *Exported = cast<NamedDecl>(D);
4507 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4508 Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4509 Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4510 break;
4511 }
4512
4513 case UPD_DECL_MARKED_OPENMP_DECLARETARGET: {
4514 OMPDeclareTargetDeclAttr::MapTypeTy MapType =
4515 static_cast<OMPDeclareTargetDeclAttr::MapTypeTy>(Record.readInt());
4516 OMPDeclareTargetDeclAttr::DevTypeTy DevType =
4517 static_cast<OMPDeclareTargetDeclAttr::DevTypeTy>(Record.readInt());
4518 D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4519 Reader.getContext(), MapType, DevType, ReadSourceRange(),
4520 AttributeCommonInfo::AS_Pragma));
4521 break;
4522 }
4523
4524 case UPD_ADDED_ATTR_TO_RECORD:
4525 AttrVec Attrs;
4526 Record.readAttributes(Attrs);
4527 assert(Attrs.size() == 1)((Attrs.size() == 1) ? static_cast<void> (0) : __assert_fail
("Attrs.size() == 1", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4527, __PRETTY_FUNCTION__))
;
4528 D->addAttr(Attrs[0]);
4529 break;
4530 }
4531 }
4532}