Bug Summary

File:clang/lib/Serialization/ASTReaderDecl.cpp
Warning:line 4193, column 11
Called C++ object pointer is null

Annotated Source Code

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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 -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-11/lib/clang/11.0.0 -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-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/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-11/lib/clang/11.0.0/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-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/lib/Serialization -fdebug-prefix-map=/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347=. -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-2020-03-09-184146-41876-1 -x c++ /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp
1//===- ASTReaderDecl.cpp - Decl Deserialization ---------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the ASTReader::readDeclRecord method, which is the
10// entrypoint for loading a decl.
11//
12//===----------------------------------------------------------------------===//
13
14#include "ASTCommon.h"
15#include "ASTReaderInternals.h"
16#include "clang/AST/ASTContext.h"
17#include "clang/AST/Attr.h"
18#include "clang/AST/AttrIterator.h"
19#include "clang/AST/Decl.h"
20#include "clang/AST/DeclBase.h"
21#include "clang/AST/DeclCXX.h"
22#include "clang/AST/DeclFriend.h"
23#include "clang/AST/DeclObjC.h"
24#include "clang/AST/DeclOpenMP.h"
25#include "clang/AST/DeclTemplate.h"
26#include "clang/AST/DeclVisitor.h"
27#include "clang/AST/DeclarationName.h"
28#include "clang/AST/Expr.h"
29#include "clang/AST/ExternalASTSource.h"
30#include "clang/AST/LambdaCapture.h"
31#include "clang/AST/NestedNameSpecifier.h"
32#include "clang/AST/OpenMPClause.h"
33#include "clang/AST/Redeclarable.h"
34#include "clang/AST/Stmt.h"
35#include "clang/AST/TemplateBase.h"
36#include "clang/AST/Type.h"
37#include "clang/AST/UnresolvedSet.h"
38#include "clang/Basic/AttrKinds.h"
39#include "clang/Basic/ExceptionSpecificationType.h"
40#include "clang/Basic/IdentifierTable.h"
41#include "clang/Basic/LLVM.h"
42#include "clang/Basic/Lambda.h"
43#include "clang/Basic/LangOptions.h"
44#include "clang/Basic/Linkage.h"
45#include "clang/Basic/Module.h"
46#include "clang/Basic/PragmaKinds.h"
47#include "clang/Basic/SourceLocation.h"
48#include "clang/Basic/Specifiers.h"
49#include "clang/Sema/IdentifierResolver.h"
50#include "clang/Serialization/ASTBitCodes.h"
51#include "clang/Serialization/ASTRecordReader.h"
52#include "clang/Serialization/ContinuousRangeMap.h"
53#include "clang/Serialization/ModuleFile.h"
54#include "llvm/ADT/DenseMap.h"
55#include "llvm/ADT/FoldingSet.h"
56#include "llvm/ADT/STLExtras.h"
57#include "llvm/ADT/SmallPtrSet.h"
58#include "llvm/ADT/SmallVector.h"
59#include "llvm/ADT/iterator_range.h"
60#include "llvm/Bitstream/BitstreamReader.h"
61#include "llvm/Support/Casting.h"
62#include "llvm/Support/ErrorHandling.h"
63#include "llvm/Support/SaveAndRestore.h"
64#include <algorithm>
65#include <cassert>
66#include <cstdint>
67#include <cstring>
68#include <string>
69#include <utility>
70
71using namespace clang;
72using namespace serialization;
73
74//===----------------------------------------------------------------------===//
75// Declaration deserialization
76//===----------------------------------------------------------------------===//
77
78namespace clang {
79
80 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
81 ASTReader &Reader;
82 ASTRecordReader &Record;
83 ASTReader::RecordLocation Loc;
84 const DeclID ThisDeclID;
85 const SourceLocation ThisDeclLoc;
86
87 using RecordData = ASTReader::RecordData;
88
89 TypeID DeferredTypeID = 0;
90 unsigned AnonymousDeclNumber;
91 GlobalDeclID NamedDeclForTagDecl = 0;
92 IdentifierInfo *TypedefNameForLinkage = nullptr;
93
94 bool HasPendingBody = false;
95
96 ///A flag to carry the information for a decl from the entity is
97 /// used. We use it to delay the marking of the canonical decl as used until
98 /// the entire declaration is deserialized and merged.
99 bool IsDeclMarkedUsed = false;
100
101 uint64_t GetCurrentCursorOffset();
102
103 uint64_t ReadLocalOffset() {
104 uint64_t LocalOffset = Record.readInt();
105 assert(LocalOffset < Loc.Offset && "offset point after current record")((LocalOffset < Loc.Offset && "offset point after current record"
) ? static_cast<void> (0) : __assert_fail ("LocalOffset < Loc.Offset && \"offset point after current record\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 105, __PRETTY_FUNCTION__))
;
106 return LocalOffset ? Loc.Offset - LocalOffset : 0;
107 }
108
109 uint64_t ReadGlobalOffset() {
110 uint64_t Local = ReadLocalOffset();
111 return Local ? Record.getGlobalBitOffset(Local) : 0;
112 }
113
114 SourceLocation readSourceLocation() {
115 return Record.readSourceLocation();
116 }
117
118 SourceRange readSourceRange() {
119 return Record.readSourceRange();
120 }
121
122 TypeSourceInfo *readTypeSourceInfo() {
123 return Record.readTypeSourceInfo();
124 }
125
126 serialization::DeclID readDeclID() {
127 return Record.readDeclID();
128 }
129
130 std::string readString() {
131 return Record.readString();
132 }
133
134 void readDeclIDList(SmallVectorImpl<DeclID> &IDs) {
135 for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
136 IDs.push_back(readDeclID());
137 }
138
139 Decl *readDecl() {
140 return Record.readDecl();
141 }
142
143 template<typename T>
144 T *readDeclAs() {
145 return Record.readDeclAs<T>();
146 }
147
148 serialization::SubmoduleID readSubmoduleID() {
149 if (Record.getIdx() == Record.size())
150 return 0;
151
152 return Record.getGlobalSubmoduleID(Record.readInt());
153 }
154
155 Module *readModule() {
156 return Record.getSubmodule(readSubmoduleID());
157 }
158
159 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
160 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
161 const CXXRecordDecl *D);
162 void MergeDefinitionData(CXXRecordDecl *D,
163 struct CXXRecordDecl::DefinitionData &&NewDD);
164 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
165 void MergeDefinitionData(ObjCInterfaceDecl *D,
166 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
167 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
168 void MergeDefinitionData(ObjCProtocolDecl *D,
169 struct ObjCProtocolDecl::DefinitionData &&NewDD);
170
171 static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
172
173 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
174 DeclContext *DC,
175 unsigned Index);
176 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
177 unsigned Index, NamedDecl *D);
178
179 /// Results from loading a RedeclarableDecl.
180 class RedeclarableResult {
181 Decl *MergeWith;
182 GlobalDeclID FirstID;
183 bool IsKeyDecl;
184
185 public:
186 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
187 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
188
189 /// Retrieve the first ID.
190 GlobalDeclID getFirstID() const { return FirstID; }
191
192 /// Is this declaration a key declaration?
193 bool isKeyDecl() const { return IsKeyDecl; }
194
195 /// Get a known declaration that this should be merged with, if
196 /// any.
197 Decl *getKnownMergeTarget() const { return MergeWith; }
198 };
199
200 /// Class used to capture the result of searching for an existing
201 /// declaration of a specific kind and name, along with the ability
202 /// to update the place where this result was found (the declaration
203 /// chain hanging off an identifier or the DeclContext we searched in)
204 /// if requested.
205 class FindExistingResult {
206 ASTReader &Reader;
207 NamedDecl *New = nullptr;
208 NamedDecl *Existing = nullptr;
209 bool AddResult = false;
210 unsigned AnonymousDeclNumber = 0;
211 IdentifierInfo *TypedefNameForLinkage = nullptr;
212
213 public:
214 FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
215
216 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
217 unsigned AnonymousDeclNumber,
218 IdentifierInfo *TypedefNameForLinkage)
219 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
220 AnonymousDeclNumber(AnonymousDeclNumber),
221 TypedefNameForLinkage(TypedefNameForLinkage) {}
222
223 FindExistingResult(FindExistingResult &&Other)
224 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
225 AddResult(Other.AddResult),
226 AnonymousDeclNumber(Other.AnonymousDeclNumber),
227 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
228 Other.AddResult = false;
229 }
230
231 FindExistingResult &operator=(FindExistingResult &&) = delete;
232 ~FindExistingResult();
233
234 /// Suppress the addition of this result into the known set of
235 /// names.
236 void suppress() { AddResult = false; }
237
238 operator NamedDecl*() const { return Existing; }
239
240 template<typename T>
241 operator T*() const { return dyn_cast_or_null<T>(Existing); }
242 };
243
244 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
245 DeclContext *DC);
246 FindExistingResult findExisting(NamedDecl *D);
247
248 public:
249 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
250 ASTReader::RecordLocation Loc,
251 DeclID thisDeclID, SourceLocation ThisDeclLoc)
252 : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
253 ThisDeclLoc(ThisDeclLoc) {}
254
255 template <typename T> static
256 void AddLazySpecializations(T *D,
257 SmallVectorImpl<serialization::DeclID>& IDs) {
258 if (IDs.empty())
259 return;
260
261 // FIXME: We should avoid this pattern of getting the ASTContext.
262 ASTContext &C = D->getASTContext();
263
264 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
265
266 if (auto &Old = LazySpecializations) {
267 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
268 llvm::sort(IDs);
269 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
270 }
271
272 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
273 *Result = IDs.size();
274 std::copy(IDs.begin(), IDs.end(), Result + 1);
275
276 LazySpecializations = Result;
277 }
278
279 template <typename DeclT>
280 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
281 static Decl *getMostRecentDeclImpl(...);
282 static Decl *getMostRecentDecl(Decl *D);
283
284 template <typename DeclT>
285 static void attachPreviousDeclImpl(ASTReader &Reader,
286 Redeclarable<DeclT> *D, Decl *Previous,
287 Decl *Canon);
288 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
289 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
290 Decl *Canon);
291
292 template <typename DeclT>
293 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
294 static void attachLatestDeclImpl(...);
295 static void attachLatestDecl(Decl *D, Decl *latest);
296
297 template <typename DeclT>
298 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
299 static void markIncompleteDeclChainImpl(...);
300
301 /// Determine whether this declaration has a pending body.
302 bool hasPendingBody() const { return HasPendingBody; }
303
304 void ReadFunctionDefinition(FunctionDecl *FD);
305 void Visit(Decl *D);
306
307 void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
308
309 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
310 ObjCCategoryDecl *Next) {
311 Cat->NextClassCategory = Next;
312 }
313
314 void VisitDecl(Decl *D);
315 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
316 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
317 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
318 void VisitNamedDecl(NamedDecl *ND);
319 void VisitLabelDecl(LabelDecl *LD);
320 void VisitNamespaceDecl(NamespaceDecl *D);
321 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
322 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
323 void VisitTypeDecl(TypeDecl *TD);
324 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
325 void VisitTypedefDecl(TypedefDecl *TD);
326 void VisitTypeAliasDecl(TypeAliasDecl *TD);
327 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
328 RedeclarableResult VisitTagDecl(TagDecl *TD);
329 void VisitEnumDecl(EnumDecl *ED);
330 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
331 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
332 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
333 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
334 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
335 ClassTemplateSpecializationDecl *D);
336
337 void VisitClassTemplateSpecializationDecl(
338 ClassTemplateSpecializationDecl *D) {
339 VisitClassTemplateSpecializationDeclImpl(D);
340 }
341
342 void VisitClassTemplatePartialSpecializationDecl(
343 ClassTemplatePartialSpecializationDecl *D);
344 void VisitClassScopeFunctionSpecializationDecl(
345 ClassScopeFunctionSpecializationDecl *D);
346 RedeclarableResult
347 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
348
349 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
350 VisitVarTemplateSpecializationDeclImpl(D);
351 }
352
353 void VisitVarTemplatePartialSpecializationDecl(
354 VarTemplatePartialSpecializationDecl *D);
355 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
356 void VisitValueDecl(ValueDecl *VD);
357 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
358 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
359 void VisitDeclaratorDecl(DeclaratorDecl *DD);
360 void VisitFunctionDecl(FunctionDecl *FD);
361 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
362 void VisitCXXMethodDecl(CXXMethodDecl *D);
363 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
364 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
365 void VisitCXXConversionDecl(CXXConversionDecl *D);
366 void VisitFieldDecl(FieldDecl *FD);
367 void VisitMSPropertyDecl(MSPropertyDecl *FD);
368 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
369 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
370 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
371 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
372 void VisitParmVarDecl(ParmVarDecl *PD);
373 void VisitDecompositionDecl(DecompositionDecl *DD);
374 void VisitBindingDecl(BindingDecl *BD);
375 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
376 DeclID VisitTemplateDecl(TemplateDecl *D);
377 void VisitConceptDecl(ConceptDecl *D);
378 void VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D);
379 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
380 void VisitClassTemplateDecl(ClassTemplateDecl *D);
381 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
382 void VisitVarTemplateDecl(VarTemplateDecl *D);
383 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
384 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
385 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
386 void VisitUsingDecl(UsingDecl *D);
387 void VisitUsingPackDecl(UsingPackDecl *D);
388 void VisitUsingShadowDecl(UsingShadowDecl *D);
389 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
390 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
391 void VisitExportDecl(ExportDecl *D);
392 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
393 void VisitImportDecl(ImportDecl *D);
394 void VisitAccessSpecDecl(AccessSpecDecl *D);
395 void VisitFriendDecl(FriendDecl *D);
396 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
397 void VisitStaticAssertDecl(StaticAssertDecl *D);
398 void VisitBlockDecl(BlockDecl *BD);
399 void VisitCapturedDecl(CapturedDecl *CD);
400 void VisitEmptyDecl(EmptyDecl *D);
401 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
402
403 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
404
405 template<typename T>
406 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
407
408 template<typename T>
409 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
410 DeclID TemplatePatternID = 0);
411
412 template<typename T>
413 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
414 RedeclarableResult &Redecl,
415 DeclID TemplatePatternID = 0);
416
417 template<typename T>
418 void mergeMergeable(Mergeable<T> *D);
419
420 void mergeMergeable(LifetimeExtendedTemporaryDecl *D);
421
422 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
423 RedeclarableTemplateDecl *Existing,
424 DeclID DsID, bool IsKeyDecl);
425
426 ObjCTypeParamList *ReadObjCTypeParamList();
427
428 // FIXME: Reorder according to DeclNodes.td?
429 void VisitObjCMethodDecl(ObjCMethodDecl *D);
430 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
431 void VisitObjCContainerDecl(ObjCContainerDecl *D);
432 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
433 void VisitObjCIvarDecl(ObjCIvarDecl *D);
434 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
435 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
436 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
437 void VisitObjCImplDecl(ObjCImplDecl *D);
438 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
439 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
440 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
441 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
442 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
443 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
444 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
445 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
446 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
447 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
448 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
449 };
450
451} // namespace clang
452
453namespace {
454
455/// Iterator over the redeclarations of a declaration that have already
456/// been merged into the same redeclaration chain.
457template<typename DeclT>
458class MergedRedeclIterator {
459 DeclT *Start;
460 DeclT *Canonical = nullptr;
461 DeclT *Current = nullptr;
462
463public:
464 MergedRedeclIterator() = default;
465 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
466
467 DeclT *operator*() { return Current; }
468
469 MergedRedeclIterator &operator++() {
470 if (Current->isFirstDecl()) {
471 Canonical = Current;
472 Current = Current->getMostRecentDecl();
473 } else
474 Current = Current->getPreviousDecl();
475
476 // If we started in the merged portion, we'll reach our start position
477 // eventually. Otherwise, we'll never reach it, but the second declaration
478 // we reached was the canonical declaration, so stop when we see that one
479 // again.
480 if (Current == Start || Current == Canonical)
481 Current = nullptr;
482 return *this;
483 }
484
485 friend bool operator!=(const MergedRedeclIterator &A,
486 const MergedRedeclIterator &B) {
487 return A.Current != B.Current;
488 }
489};
490
491} // namespace
492
493template <typename DeclT>
494static llvm::iterator_range<MergedRedeclIterator<DeclT>>
495merged_redecls(DeclT *D) {
496 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
497 MergedRedeclIterator<DeclT>());
498}
499
500uint64_t ASTDeclReader::GetCurrentCursorOffset() {
501 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
502}
503
504void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
505 if (Record.readInt())
506 Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
507 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
508 CD->setNumCtorInitializers(Record.readInt());
509 if (CD->getNumCtorInitializers())
510 CD->CtorInitializers = ReadGlobalOffset();
511 }
512 // Store the offset of the body so we can lazily load it later.
513 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
514 HasPendingBody = true;
515}
516
517void ASTDeclReader::Visit(Decl *D) {
518 DeclVisitor<ASTDeclReader, void>::Visit(D);
519
520 // At this point we have deserialized and merged the decl and it is safe to
521 // update its canonical decl to signal that the entire entity is used.
522 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
523 IsDeclMarkedUsed = false;
524
525 if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
526 if (auto *TInfo = DD->getTypeSourceInfo())
527 Record.readTypeLoc(TInfo->getTypeLoc());
528 }
529
530 if (auto *TD = dyn_cast<TypeDecl>(D)) {
531 // We have a fully initialized TypeDecl. Read its type now.
532 TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
533
534 // If this is a tag declaration with a typedef name for linkage, it's safe
535 // to load that typedef now.
536 if (NamedDeclForTagDecl)
537 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
538 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
539 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
540 // if we have a fully initialized TypeDecl, we can safely read its type now.
541 ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
542 } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
543 // FunctionDecl's body was written last after all other Stmts/Exprs.
544 // We only read it if FD doesn't already have a body (e.g., from another
545 // module).
546 // FIXME: Can we diagnose ODR violations somehow?
547 if (Record.readInt())
548 ReadFunctionDefinition(FD);
549 }
550}
551
552void ASTDeclReader::VisitDecl(Decl *D) {
553 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
554 isa<ParmVarDecl>(D) || isa<ObjCTypeParamDecl>(D)) {
555 // We don't want to deserialize the DeclContext of a template
556 // parameter or of a parameter of a function template immediately. These
557 // entities might be used in the formulation of its DeclContext (for
558 // example, a function parameter can be used in decltype() in trailing
559 // return type of the function). Use the translation unit DeclContext as a
560 // placeholder.
561 GlobalDeclID SemaDCIDForTemplateParmDecl = readDeclID();
562 GlobalDeclID LexicalDCIDForTemplateParmDecl = readDeclID();
563 if (!LexicalDCIDForTemplateParmDecl)
564 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
565 Reader.addPendingDeclContextInfo(D,
566 SemaDCIDForTemplateParmDecl,
567 LexicalDCIDForTemplateParmDecl);
568 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
569 } else {
570 auto *SemaDC = readDeclAs<DeclContext>();
571 auto *LexicalDC = readDeclAs<DeclContext>();
572 if (!LexicalDC)
573 LexicalDC = SemaDC;
574 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
575 // Avoid calling setLexicalDeclContext() directly because it uses
576 // Decl::getASTContext() internally which is unsafe during derialization.
577 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
578 Reader.getContext());
579 }
580 D->setLocation(ThisDeclLoc);
581 D->setInvalidDecl(Record.readInt());
582 if (Record.readInt()) { // hasAttrs
583 AttrVec Attrs;
584 Record.readAttributes(Attrs);
585 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
586 // internally which is unsafe during derialization.
587 D->setAttrsImpl(Attrs, Reader.getContext());
588 }
589 D->setImplicit(Record.readInt());
590 D->Used = Record.readInt();
591 IsDeclMarkedUsed |= D->Used;
592 D->setReferenced(Record.readInt());
593 D->setTopLevelDeclInObjCContainer(Record.readInt());
594 D->setAccess((AccessSpecifier)Record.readInt());
595 D->FromASTFile = true;
596 bool ModulePrivate = Record.readInt();
597
598 // Determine whether this declaration is part of a (sub)module. If so, it
599 // may not yet be visible.
600 if (unsigned SubmoduleID = readSubmoduleID()) {
601 // Store the owning submodule ID in the declaration.
602 D->setModuleOwnershipKind(
603 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
604 : Decl::ModuleOwnershipKind::VisibleWhenImported);
605 D->setOwningModuleID(SubmoduleID);
606
607 if (ModulePrivate) {
608 // Module-private declarations are never visible, so there is no work to
609 // do.
610 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
611 // If local visibility is being tracked, this declaration will become
612 // hidden and visible as the owning module does.
613 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
614 // Mark the declaration as visible when its owning module becomes visible.
615 if (Owner->NameVisibility == Module::AllVisible)
616 D->setVisibleDespiteOwningModule();
617 else
618 Reader.HiddenNamesMap[Owner].push_back(D);
619 }
620 } else if (ModulePrivate) {
621 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
622 }
623}
624
625void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
626 VisitDecl(D);
627 D->setLocation(readSourceLocation());
628 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
629 std::string Arg = readString();
630 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
631 D->getTrailingObjects<char>()[Arg.size()] = '\0';
632}
633
634void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
635 VisitDecl(D);
636 D->setLocation(readSourceLocation());
637 std::string Name = readString();
638 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
639 D->getTrailingObjects<char>()[Name.size()] = '\0';
640
641 D->ValueStart = Name.size() + 1;
642 std::string Value = readString();
643 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
644 Value.size());
645 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
646}
647
648void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
649 llvm_unreachable("Translation units are not serialized")::llvm::llvm_unreachable_internal("Translation units are not serialized"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 649)
;
650}
651
652void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
653 VisitDecl(ND);
654 ND->setDeclName(Record.readDeclarationName());
655 AnonymousDeclNumber = Record.readInt();
656}
657
658void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
659 VisitNamedDecl(TD);
660 TD->setLocStart(readSourceLocation());
661 // Delay type reading until after we have fully initialized the decl.
662 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
663}
664
665ASTDeclReader::RedeclarableResult
666ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
667 RedeclarableResult Redecl = VisitRedeclarable(TD);
668 VisitTypeDecl(TD);
669 TypeSourceInfo *TInfo = readTypeSourceInfo();
670 if (Record.readInt()) { // isModed
671 QualType modedT = Record.readType();
672 TD->setModedTypeSourceInfo(TInfo, modedT);
673 } else
674 TD->setTypeSourceInfo(TInfo);
675 // Read and discard the declaration for which this is a typedef name for
676 // linkage, if it exists. We cannot rely on our type to pull in this decl,
677 // because it might have been merged with a type from another module and
678 // thus might not refer to our version of the declaration.
679 readDecl();
680 return Redecl;
681}
682
683void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
684 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
685 mergeRedeclarable(TD, Redecl);
686}
687
688void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
689 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
690 if (auto *Template = readDeclAs<TypeAliasTemplateDecl>())
691 // Merged when we merge the template.
692 TD->setDescribedAliasTemplate(Template);
693 else
694 mergeRedeclarable(TD, Redecl);
695}
696
697ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
698 RedeclarableResult Redecl = VisitRedeclarable(TD);
699 VisitTypeDecl(TD);
700
701 TD->IdentifierNamespace = Record.readInt();
702 TD->setTagKind((TagDecl::TagKind)Record.readInt());
703 if (!isa<CXXRecordDecl>(TD))
704 TD->setCompleteDefinition(Record.readInt());
705 TD->setEmbeddedInDeclarator(Record.readInt());
706 TD->setFreeStanding(Record.readInt());
707 TD->setCompleteDefinitionRequired(Record.readInt());
708 TD->setBraceRange(readSourceRange());
709
710 switch (Record.readInt()) {
711 case 0:
712 break;
713 case 1: { // ExtInfo
714 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
715 Record.readQualifierInfo(*Info);
716 TD->TypedefNameDeclOrQualifier = Info;
717 break;
718 }
719 case 2: // TypedefNameForAnonDecl
720 NamedDeclForTagDecl = readDeclID();
721 TypedefNameForLinkage = Record.readIdentifier();
722 break;
723 default:
724 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 724)
;
725 }
726
727 if (!isa<CXXRecordDecl>(TD))
728 mergeRedeclarable(TD, Redecl);
729 return Redecl;
730}
731
732void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
733 VisitTagDecl(ED);
734 if (TypeSourceInfo *TI = readTypeSourceInfo())
735 ED->setIntegerTypeSourceInfo(TI);
736 else
737 ED->setIntegerType(Record.readType());
738 ED->setPromotionType(Record.readType());
739 ED->setNumPositiveBits(Record.readInt());
740 ED->setNumNegativeBits(Record.readInt());
741 ED->setScoped(Record.readInt());
742 ED->setScopedUsingClassTag(Record.readInt());
743 ED->setFixed(Record.readInt());
744
745 ED->setHasODRHash(true);
746 ED->ODRHash = Record.readInt();
747
748 // If this is a definition subject to the ODR, and we already have a
749 // definition, merge this one into it.
750 if (ED->isCompleteDefinition() &&
751 Reader.getContext().getLangOpts().Modules &&
752 Reader.getContext().getLangOpts().CPlusPlus) {
753 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
754 if (!OldDef) {
755 // This is the first time we've seen an imported definition. Look for a
756 // local definition before deciding that we are the first definition.
757 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
758 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
759 OldDef = D;
760 break;
761 }
762 }
763 }
764 if (OldDef) {
765 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
766 ED->setCompleteDefinition(false);
767 Reader.mergeDefinitionVisibility(OldDef, ED);
768 if (OldDef->getODRHash() != ED->getODRHash())
769 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
770 } else {
771 OldDef = ED;
772 }
773 }
774
775 if (auto *InstED = readDeclAs<EnumDecl>()) {
776 auto TSK = (TemplateSpecializationKind)Record.readInt();
777 SourceLocation POI = readSourceLocation();
778 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
779 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
780 }
781}
782
783ASTDeclReader::RedeclarableResult
784ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
785 RedeclarableResult Redecl = VisitTagDecl(RD);
786 RD->setHasFlexibleArrayMember(Record.readInt());
787 RD->setAnonymousStructOrUnion(Record.readInt());
788 RD->setHasObjectMember(Record.readInt());
789 RD->setHasVolatileMember(Record.readInt());
790 RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
791 RD->setNonTrivialToPrimitiveCopy(Record.readInt());
792 RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
793 RD->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(Record.readInt());
794 RD->setHasNonTrivialToPrimitiveDestructCUnion(Record.readInt());
795 RD->setHasNonTrivialToPrimitiveCopyCUnion(Record.readInt());
796 RD->setParamDestroyedInCallee(Record.readInt());
797 RD->setArgPassingRestrictions((RecordDecl::ArgPassingKind)Record.readInt());
798 return Redecl;
799}
800
801void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
802 VisitNamedDecl(VD);
803 // For function declarations, defer reading the type in case the function has
804 // a deduced return type that references an entity declared within the
805 // function.
806 if (isa<FunctionDecl>(VD))
807 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
808 else
809 VD->setType(Record.readType());
810}
811
812void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
813 VisitValueDecl(ECD);
814 if (Record.readInt())
815 ECD->setInitExpr(Record.readExpr());
816 ECD->setInitVal(Record.readAPSInt());
817 mergeMergeable(ECD);
818}
819
820void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
821 VisitValueDecl(DD);
822 DD->setInnerLocStart(readSourceLocation());
823 if (Record.readInt()) { // hasExtInfo
824 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
825 Record.readQualifierInfo(*Info);
826 Info->TrailingRequiresClause = Record.readExpr();
827 DD->DeclInfo = Info;
828 }
829 QualType TSIType = Record.readType();
830 DD->setTypeSourceInfo(
831 TSIType.isNull() ? nullptr
832 : Reader.getContext().CreateTypeSourceInfo(TSIType));
833}
834
835void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
836 RedeclarableResult Redecl = VisitRedeclarable(FD);
837 VisitDeclaratorDecl(FD);
838
839 // Attach a type to this function. Use the real type if possible, but fall
840 // back to the type as written if it involves a deduced return type.
841 if (FD->getTypeSourceInfo() &&
842 FD->getTypeSourceInfo()->getType()->castAs<FunctionType>()
843 ->getReturnType()->getContainedAutoType()) {
844 // We'll set up the real type in Visit, once we've finished loading the
845 // function.
846 FD->setType(FD->getTypeSourceInfo()->getType());
847 Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
848 } else {
849 FD->setType(Reader.GetType(DeferredTypeID));
850 }
851 DeferredTypeID = 0;
852
853 FD->DNLoc = Record.readDeclarationNameLoc(FD->getDeclName());
854 FD->IdentifierNamespace = Record.readInt();
855
856 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
857 // after everything else is read.
858
859 FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
860 FD->setInlineSpecified(Record.readInt());
861 FD->setImplicitlyInline(Record.readInt());
862 FD->setVirtualAsWritten(Record.readInt());
863 FD->setPure(Record.readInt());
864 FD->setHasInheritedPrototype(Record.readInt());
865 FD->setHasWrittenPrototype(Record.readInt());
866 FD->setDeletedAsWritten(Record.readInt());
867 FD->setTrivial(Record.readInt());
868 FD->setTrivialForCall(Record.readInt());
869 FD->setDefaulted(Record.readInt());
870 FD->setExplicitlyDefaulted(Record.readInt());
871 FD->setHasImplicitReturnZero(Record.readInt());
872 FD->setConstexprKind(static_cast<ConstexprSpecKind>(Record.readInt()));
873 FD->setUsesSEHTry(Record.readInt());
874 FD->setHasSkippedBody(Record.readInt());
875 FD->setIsMultiVersion(Record.readInt());
876 FD->setLateTemplateParsed(Record.readInt());
877
878 FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
879 FD->EndRangeLoc = readSourceLocation();
880
881 FD->ODRHash = Record.readInt();
882 FD->setHasODRHash(true);
883 FD->setUsesFPIntrin(Record.readInt());
884
885 if (FD->isDefaulted()) {
886 if (unsigned NumLookups = Record.readInt()) {
887 SmallVector<DeclAccessPair, 8> Lookups;
888 for (unsigned I = 0; I != NumLookups; ++I) {
889 NamedDecl *ND = Record.readDeclAs<NamedDecl>();
890 AccessSpecifier AS = (AccessSpecifier)Record.readInt();
891 Lookups.push_back(DeclAccessPair::make(ND, AS));
892 }
893 FD->setDefaultedFunctionInfo(FunctionDecl::DefaultedFunctionInfo::Create(
894 Reader.getContext(), Lookups));
895 }
896 }
897
898 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
899 case FunctionDecl::TK_NonTemplate:
900 mergeRedeclarable(FD, Redecl);
901 break;
902 case FunctionDecl::TK_FunctionTemplate:
903 // Merged when we merge the template.
904 FD->setDescribedFunctionTemplate(readDeclAs<FunctionTemplateDecl>());
905 break;
906 case FunctionDecl::TK_MemberSpecialization: {
907 auto *InstFD = readDeclAs<FunctionDecl>();
908 auto TSK = (TemplateSpecializationKind)Record.readInt();
909 SourceLocation POI = readSourceLocation();
910 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
911 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
912 mergeRedeclarable(FD, Redecl);
913 break;
914 }
915 case FunctionDecl::TK_FunctionTemplateSpecialization: {
916 auto *Template = readDeclAs<FunctionTemplateDecl>();
917 auto TSK = (TemplateSpecializationKind)Record.readInt();
918
919 // Template arguments.
920 SmallVector<TemplateArgument, 8> TemplArgs;
921 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
922
923 // Template args as written.
924 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
925 SourceLocation LAngleLoc, RAngleLoc;
926 bool HasTemplateArgumentsAsWritten = Record.readInt();
927 if (HasTemplateArgumentsAsWritten) {
928 unsigned NumTemplateArgLocs = Record.readInt();
929 TemplArgLocs.reserve(NumTemplateArgLocs);
930 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
931 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
932
933 LAngleLoc = readSourceLocation();
934 RAngleLoc = readSourceLocation();
935 }
936
937 SourceLocation POI = readSourceLocation();
938
939 ASTContext &C = Reader.getContext();
940 TemplateArgumentList *TemplArgList
941 = TemplateArgumentList::CreateCopy(C, TemplArgs);
942 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
943 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
944 TemplArgsInfo.addArgument(TemplArgLocs[i]);
945
946 MemberSpecializationInfo *MSInfo = nullptr;
947 if (Record.readInt()) {
948 auto *FD = readDeclAs<FunctionDecl>();
949 auto TSK = (TemplateSpecializationKind)Record.readInt();
950 SourceLocation POI = readSourceLocation();
951
952 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
953 MSInfo->setPointOfInstantiation(POI);
954 }
955
956 FunctionTemplateSpecializationInfo *FTInfo =
957 FunctionTemplateSpecializationInfo::Create(
958 C, FD, Template, TSK, TemplArgList,
959 HasTemplateArgumentsAsWritten ? &TemplArgsInfo : nullptr, POI,
960 MSInfo);
961 FD->TemplateOrSpecialization = FTInfo;
962
963 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
964 // The template that contains the specializations set. It's not safe to
965 // use getCanonicalDecl on Template since it may still be initializing.
966 auto *CanonTemplate = readDeclAs<FunctionTemplateDecl>();
967 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
968 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
969 // FunctionTemplateSpecializationInfo's Profile().
970 // We avoid getASTContext because a decl in the parent hierarchy may
971 // be initializing.
972 llvm::FoldingSetNodeID ID;
973 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
974 void *InsertPos = nullptr;
975 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
976 FunctionTemplateSpecializationInfo *ExistingInfo =
977 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
978 if (InsertPos)
979 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
980 else {
981 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 982, __PRETTY_FUNCTION__))
982 "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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 982, __PRETTY_FUNCTION__))
;
983 mergeRedeclarable(FD, ExistingInfo->getFunction(), Redecl);
984 }
985 }
986 break;
987 }
988 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
989 // Templates.
990 UnresolvedSet<8> TemplDecls;
991 unsigned NumTemplates = Record.readInt();
992 while (NumTemplates--)
993 TemplDecls.addDecl(readDeclAs<NamedDecl>());
994
995 // Templates args.
996 TemplateArgumentListInfo TemplArgs;
997 unsigned NumArgs = Record.readInt();
998 while (NumArgs--)
999 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
1000 TemplArgs.setLAngleLoc(readSourceLocation());
1001 TemplArgs.setRAngleLoc(readSourceLocation());
1002
1003 FD->setDependentTemplateSpecialization(Reader.getContext(),
1004 TemplDecls, TemplArgs);
1005 // These are not merged; we don't need to merge redeclarations of dependent
1006 // template friends.
1007 break;
1008 }
1009 }
1010
1011 // Read in the parameters.
1012 unsigned NumParams = Record.readInt();
1013 SmallVector<ParmVarDecl *, 16> Params;
1014 Params.reserve(NumParams);
1015 for (unsigned I = 0; I != NumParams; ++I)
1016 Params.push_back(readDeclAs<ParmVarDecl>());
1017 FD->setParams(Reader.getContext(), Params);
1018}
1019
1020void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
1021 VisitNamedDecl(MD);
1022 if (Record.readInt()) {
1023 // Load the body on-demand. Most clients won't care, because method
1024 // definitions rarely show up in headers.
1025 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1026 HasPendingBody = true;
1027 }
1028 MD->setSelfDecl(readDeclAs<ImplicitParamDecl>());
1029 MD->setCmdDecl(readDeclAs<ImplicitParamDecl>());
1030 MD->setInstanceMethod(Record.readInt());
1031 MD->setVariadic(Record.readInt());
1032 MD->setPropertyAccessor(Record.readInt());
1033 MD->setSynthesizedAccessorStub(Record.readInt());
1034 MD->setDefined(Record.readInt());
1035 MD->setOverriding(Record.readInt());
1036 MD->setHasSkippedBody(Record.readInt());
1037
1038 MD->setIsRedeclaration(Record.readInt());
1039 MD->setHasRedeclaration(Record.readInt());
1040 if (MD->hasRedeclaration())
1041 Reader.getContext().setObjCMethodRedeclaration(MD,
1042 readDeclAs<ObjCMethodDecl>());
1043
1044 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1045 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1046 MD->setRelatedResultType(Record.readInt());
1047 MD->setReturnType(Record.readType());
1048 MD->setReturnTypeSourceInfo(readTypeSourceInfo());
1049 MD->DeclEndLoc = readSourceLocation();
1050 unsigned NumParams = Record.readInt();
1051 SmallVector<ParmVarDecl *, 16> Params;
1052 Params.reserve(NumParams);
1053 for (unsigned I = 0; I != NumParams; ++I)
1054 Params.push_back(readDeclAs<ParmVarDecl>());
1055
1056 MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1057 unsigned NumStoredSelLocs = Record.readInt();
1058 SmallVector<SourceLocation, 16> SelLocs;
1059 SelLocs.reserve(NumStoredSelLocs);
1060 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1061 SelLocs.push_back(readSourceLocation());
1062
1063 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1064}
1065
1066void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1067 VisitTypedefNameDecl(D);
1068
1069 D->Variance = Record.readInt();
1070 D->Index = Record.readInt();
1071 D->VarianceLoc = readSourceLocation();
1072 D->ColonLoc = readSourceLocation();
1073}
1074
1075void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1076 VisitNamedDecl(CD);
1077 CD->setAtStartLoc(readSourceLocation());
1078 CD->setAtEndRange(readSourceRange());
1079}
1080
1081ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1082 unsigned numParams = Record.readInt();
1083 if (numParams == 0)
1084 return nullptr;
1085
1086 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1087 typeParams.reserve(numParams);
1088 for (unsigned i = 0; i != numParams; ++i) {
1089 auto *typeParam = readDeclAs<ObjCTypeParamDecl>();
1090 if (!typeParam)
1091 return nullptr;
1092
1093 typeParams.push_back(typeParam);
1094 }
1095
1096 SourceLocation lAngleLoc = readSourceLocation();
1097 SourceLocation rAngleLoc = readSourceLocation();
1098
1099 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1100 typeParams, rAngleLoc);
1101}
1102
1103void ASTDeclReader::ReadObjCDefinitionData(
1104 struct ObjCInterfaceDecl::DefinitionData &Data) {
1105 // Read the superclass.
1106 Data.SuperClassTInfo = readTypeSourceInfo();
1107
1108 Data.EndLoc = readSourceLocation();
1109 Data.HasDesignatedInitializers = Record.readInt();
1110
1111 // Read the directly referenced protocols and their SourceLocations.
1112 unsigned NumProtocols = Record.readInt();
1113 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1114 Protocols.reserve(NumProtocols);
1115 for (unsigned I = 0; I != NumProtocols; ++I)
1116 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1117 SmallVector<SourceLocation, 16> ProtoLocs;
1118 ProtoLocs.reserve(NumProtocols);
1119 for (unsigned I = 0; I != NumProtocols; ++I)
1120 ProtoLocs.push_back(readSourceLocation());
1121 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1122 Reader.getContext());
1123
1124 // Read the transitive closure of protocols referenced by this class.
1125 NumProtocols = Record.readInt();
1126 Protocols.clear();
1127 Protocols.reserve(NumProtocols);
1128 for (unsigned I = 0; I != NumProtocols; ++I)
1129 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1130 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1131 Reader.getContext());
1132}
1133
1134void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1135 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1136 // FIXME: odr checking?
1137}
1138
1139void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1140 RedeclarableResult Redecl = VisitRedeclarable(ID);
1141 VisitObjCContainerDecl(ID);
1142 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1143 mergeRedeclarable(ID, Redecl);
1144
1145 ID->TypeParamList = ReadObjCTypeParamList();
1146 if (Record.readInt()) {
1147 // Read the definition.
1148 ID->allocateDefinitionData();
1149
1150 ReadObjCDefinitionData(ID->data());
1151 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1152 if (Canon->Data.getPointer()) {
1153 // If we already have a definition, keep the definition invariant and
1154 // merge the data.
1155 MergeDefinitionData(Canon, std::move(ID->data()));
1156 ID->Data = Canon->Data;
1157 } else {
1158 // Set the definition data of the canonical declaration, so other
1159 // redeclarations will see it.
1160 ID->getCanonicalDecl()->Data = ID->Data;
1161
1162 // We will rebuild this list lazily.
1163 ID->setIvarList(nullptr);
1164 }
1165
1166 // Note that we have deserialized a definition.
1167 Reader.PendingDefinitions.insert(ID);
1168
1169 // Note that we've loaded this Objective-C class.
1170 Reader.ObjCClassesLoaded.push_back(ID);
1171 } else {
1172 ID->Data = ID->getCanonicalDecl()->Data;
1173 }
1174}
1175
1176void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1177 VisitFieldDecl(IVD);
1178 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1179 // This field will be built lazily.
1180 IVD->setNextIvar(nullptr);
1181 bool synth = Record.readInt();
1182 IVD->setSynthesize(synth);
1183}
1184
1185void ASTDeclReader::ReadObjCDefinitionData(
1186 struct ObjCProtocolDecl::DefinitionData &Data) {
1187 unsigned NumProtoRefs = Record.readInt();
1188 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1189 ProtoRefs.reserve(NumProtoRefs);
1190 for (unsigned I = 0; I != NumProtoRefs; ++I)
1191 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1192 SmallVector<SourceLocation, 16> ProtoLocs;
1193 ProtoLocs.reserve(NumProtoRefs);
1194 for (unsigned I = 0; I != NumProtoRefs; ++I)
1195 ProtoLocs.push_back(readSourceLocation());
1196 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1197 ProtoLocs.data(), Reader.getContext());
1198}
1199
1200void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1201 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1202 // FIXME: odr checking?
1203}
1204
1205void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1206 RedeclarableResult Redecl = VisitRedeclarable(PD);
1207 VisitObjCContainerDecl(PD);
1208 mergeRedeclarable(PD, Redecl);
1209
1210 if (Record.readInt()) {
1211 // Read the definition.
1212 PD->allocateDefinitionData();
1213
1214 ReadObjCDefinitionData(PD->data());
1215
1216 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1217 if (Canon->Data.getPointer()) {
1218 // If we already have a definition, keep the definition invariant and
1219 // merge the data.
1220 MergeDefinitionData(Canon, std::move(PD->data()));
1221 PD->Data = Canon->Data;
1222 } else {
1223 // Set the definition data of the canonical declaration, so other
1224 // redeclarations will see it.
1225 PD->getCanonicalDecl()->Data = PD->Data;
1226 }
1227 // Note that we have deserialized a definition.
1228 Reader.PendingDefinitions.insert(PD);
1229 } else {
1230 PD->Data = PD->getCanonicalDecl()->Data;
1231 }
1232}
1233
1234void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1235 VisitFieldDecl(FD);
1236}
1237
1238void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1239 VisitObjCContainerDecl(CD);
1240 CD->setCategoryNameLoc(readSourceLocation());
1241 CD->setIvarLBraceLoc(readSourceLocation());
1242 CD->setIvarRBraceLoc(readSourceLocation());
1243
1244 // Note that this category has been deserialized. We do this before
1245 // deserializing the interface declaration, so that it will consider this
1246 /// category.
1247 Reader.CategoriesDeserialized.insert(CD);
1248
1249 CD->ClassInterface = readDeclAs<ObjCInterfaceDecl>();
1250 CD->TypeParamList = ReadObjCTypeParamList();
1251 unsigned NumProtoRefs = Record.readInt();
1252 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1253 ProtoRefs.reserve(NumProtoRefs);
1254 for (unsigned I = 0; I != NumProtoRefs; ++I)
1255 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1256 SmallVector<SourceLocation, 16> ProtoLocs;
1257 ProtoLocs.reserve(NumProtoRefs);
1258 for (unsigned I = 0; I != NumProtoRefs; ++I)
1259 ProtoLocs.push_back(readSourceLocation());
1260 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1261 Reader.getContext());
1262
1263 // Protocols in the class extension belong to the class.
1264 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1265 CD->ClassInterface->mergeClassExtensionProtocolList(
1266 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1267 Reader.getContext());
1268}
1269
1270void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1271 VisitNamedDecl(CAD);
1272 CAD->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1273}
1274
1275void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1276 VisitNamedDecl(D);
1277 D->setAtLoc(readSourceLocation());
1278 D->setLParenLoc(readSourceLocation());
1279 QualType T = Record.readType();
1280 TypeSourceInfo *TSI = readTypeSourceInfo();
1281 D->setType(T, TSI);
1282 D->setPropertyAttributes(
1283 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1284 D->setPropertyAttributesAsWritten(
1285 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1286 D->setPropertyImplementation(
1287 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1288 DeclarationName GetterName = Record.readDeclarationName();
1289 SourceLocation GetterLoc = readSourceLocation();
1290 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1291 DeclarationName SetterName = Record.readDeclarationName();
1292 SourceLocation SetterLoc = readSourceLocation();
1293 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1294 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1295 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1296 D->setPropertyIvarDecl(readDeclAs<ObjCIvarDecl>());
1297}
1298
1299void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1300 VisitObjCContainerDecl(D);
1301 D->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1302}
1303
1304void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1305 VisitObjCImplDecl(D);
1306 D->CategoryNameLoc = readSourceLocation();
1307}
1308
1309void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1310 VisitObjCImplDecl(D);
1311 D->setSuperClass(readDeclAs<ObjCInterfaceDecl>());
1312 D->SuperLoc = readSourceLocation();
1313 D->setIvarLBraceLoc(readSourceLocation());
1314 D->setIvarRBraceLoc(readSourceLocation());
1315 D->setHasNonZeroConstructors(Record.readInt());
1316 D->setHasDestructors(Record.readInt());
1317 D->NumIvarInitializers = Record.readInt();
1318 if (D->NumIvarInitializers)
1319 D->IvarInitializers = ReadGlobalOffset();
1320}
1321
1322void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1323 VisitDecl(D);
1324 D->setAtLoc(readSourceLocation());
1325 D->setPropertyDecl(readDeclAs<ObjCPropertyDecl>());
1326 D->PropertyIvarDecl = readDeclAs<ObjCIvarDecl>();
1327 D->IvarLoc = readSourceLocation();
1328 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1329 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1330 D->setGetterCXXConstructor(Record.readExpr());
1331 D->setSetterCXXAssignment(Record.readExpr());
1332}
1333
1334void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1335 VisitDeclaratorDecl(FD);
1336 FD->Mutable = Record.readInt();
1337
1338 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1339 FD->InitStorage.setInt(ISK);
1340 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1341 ? Record.readType().getAsOpaquePtr()
1342 : Record.readExpr());
1343 }
1344
1345 if (auto *BW = Record.readExpr())
1346 FD->setBitWidth(BW);
1347
1348 if (!FD->getDeclName()) {
1349 if (auto *Tmpl = readDeclAs<FieldDecl>())
1350 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1351 }
1352 mergeMergeable(FD);
1353}
1354
1355void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1356 VisitDeclaratorDecl(PD);
1357 PD->GetterId = Record.readIdentifier();
1358 PD->SetterId = Record.readIdentifier();
1359}
1360
1361void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1362 VisitValueDecl(FD);
1363
1364 FD->ChainingSize = Record.readInt();
1365 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1365, __PRETTY_FUNCTION__))
;
1366 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1367
1368 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1369 FD->Chaining[I] = readDeclAs<NamedDecl>();
1370
1371 mergeMergeable(FD);
1372}
1373
1374ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1375 RedeclarableResult Redecl = VisitRedeclarable(VD);
1376 VisitDeclaratorDecl(VD);
1377
1378 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1379 VD->VarDeclBits.TSCSpec = Record.readInt();
1380 VD->VarDeclBits.InitStyle = Record.readInt();
1381 VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1382 if (!isa<ParmVarDecl>(VD)) {
1383 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1384 Record.readInt();
1385 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1386 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1387 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1388 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1389 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1390 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1391 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1392 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1393 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1394 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1395 VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1396 }
1397 auto VarLinkage = Linkage(Record.readInt());
1398 VD->setCachedLinkage(VarLinkage);
1399
1400 // Reconstruct the one piece of the IdentifierNamespace that we need.
1401 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1402 VD->getLexicalDeclContext()->isFunctionOrMethod())
1403 VD->setLocalExternDecl();
1404
1405 if (uint64_t Val = Record.readInt()) {
1406 VD->setInit(Record.readExpr());
1407 if (Val > 1) {
1408 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1409 Eval->CheckedICE = true;
1410 Eval->IsICE = (Val & 1) != 0;
1411 Eval->HasConstantDestruction = (Val & 4) != 0;
1412 }
1413 }
1414
1415 if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1416 Expr *CopyExpr = Record.readExpr();
1417 if (CopyExpr)
1418 Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1419 }
1420
1421 if (VD->getStorageDuration() == SD_Static && Record.readInt())
1422 Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1423
1424 enum VarKind {
1425 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1426 };
1427 switch ((VarKind)Record.readInt()) {
1428 case VarNotTemplate:
1429 // Only true variables (not parameters or implicit parameters) can be
1430 // merged; the other kinds are not really redeclarable at all.
1431 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1432 !isa<VarTemplateSpecializationDecl>(VD))
1433 mergeRedeclarable(VD, Redecl);
1434 break;
1435 case VarTemplate:
1436 // Merged when we merge the template.
1437 VD->setDescribedVarTemplate(readDeclAs<VarTemplateDecl>());
1438 break;
1439 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1440 auto *Tmpl = readDeclAs<VarDecl>();
1441 auto TSK = (TemplateSpecializationKind)Record.readInt();
1442 SourceLocation POI = readSourceLocation();
1443 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1444 mergeRedeclarable(VD, Redecl);
1445 break;
1446 }
1447 }
1448
1449 return Redecl;
1450}
1451
1452void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1453 VisitVarDecl(PD);
1454}
1455
1456void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1457 VisitVarDecl(PD);
1458 unsigned isObjCMethodParam = Record.readInt();
1459 unsigned scopeDepth = Record.readInt();
1460 unsigned scopeIndex = Record.readInt();
1461 unsigned declQualifier = Record.readInt();
1462 if (isObjCMethodParam) {
1463 assert(scopeDepth == 0)((scopeDepth == 0) ? static_cast<void> (0) : __assert_fail
("scopeDepth == 0", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1463, __PRETTY_FUNCTION__))
;
1464 PD->setObjCMethodScopeInfo(scopeIndex);
1465 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1466 } else {
1467 PD->setScopeInfo(scopeDepth, scopeIndex);
1468 }
1469 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1470 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1471 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1472 PD->setUninstantiatedDefaultArg(Record.readExpr());
1473
1474 // FIXME: If this is a redeclaration of a function from another module, handle
1475 // inheritance of default arguments.
1476}
1477
1478void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1479 VisitVarDecl(DD);
1480 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1481 for (unsigned I = 0; I != DD->NumBindings; ++I) {
1482 BDs[I] = readDeclAs<BindingDecl>();
1483 BDs[I]->setDecomposedDecl(DD);
1484 }
1485}
1486
1487void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1488 VisitValueDecl(BD);
1489 BD->Binding = Record.readExpr();
1490}
1491
1492void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1493 VisitDecl(AD);
1494 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1495 AD->setRParenLoc(readSourceLocation());
1496}
1497
1498void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1499 VisitDecl(BD);
1500 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1501 BD->setSignatureAsWritten(readTypeSourceInfo());
1502 unsigned NumParams = Record.readInt();
1503 SmallVector<ParmVarDecl *, 16> Params;
1504 Params.reserve(NumParams);
1505 for (unsigned I = 0; I != NumParams; ++I)
1506 Params.push_back(readDeclAs<ParmVarDecl>());
1507 BD->setParams(Params);
1508
1509 BD->setIsVariadic(Record.readInt());
1510 BD->setBlockMissingReturnType(Record.readInt());
1511 BD->setIsConversionFromLambda(Record.readInt());
1512 BD->setDoesNotEscape(Record.readInt());
1513 BD->setCanAvoidCopyToHeap(Record.readInt());
1514
1515 bool capturesCXXThis = Record.readInt();
1516 unsigned numCaptures = Record.readInt();
1517 SmallVector<BlockDecl::Capture, 16> captures;
1518 captures.reserve(numCaptures);
1519 for (unsigned i = 0; i != numCaptures; ++i) {
1520 auto *decl = readDeclAs<VarDecl>();
1521 unsigned flags = Record.readInt();
1522 bool byRef = (flags & 1);
1523 bool nested = (flags & 2);
1524 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1525
1526 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1527 }
1528 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1529}
1530
1531void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1532 VisitDecl(CD);
1533 unsigned ContextParamPos = Record.readInt();
1534 CD->setNothrow(Record.readInt() != 0);
1535 // Body is set by VisitCapturedStmt.
1536 for (unsigned I = 0; I < CD->NumParams; ++I) {
1537 if (I != ContextParamPos)
1538 CD->setParam(I, readDeclAs<ImplicitParamDecl>());
1539 else
1540 CD->setContextParam(I, readDeclAs<ImplicitParamDecl>());
1541 }
1542}
1543
1544void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1545 VisitDecl(D);
1546 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1547 D->setExternLoc(readSourceLocation());
1548 D->setRBraceLoc(readSourceLocation());
1549}
1550
1551void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1552 VisitDecl(D);
1553 D->RBraceLoc = readSourceLocation();
1554}
1555
1556void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1557 VisitNamedDecl(D);
1558 D->setLocStart(readSourceLocation());
1559}
1560
1561void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1562 RedeclarableResult Redecl = VisitRedeclarable(D);
1563 VisitNamedDecl(D);
1564 D->setInline(Record.readInt());
1565 D->LocStart = readSourceLocation();
1566 D->RBraceLoc = readSourceLocation();
1567
1568 // Defer loading the anonymous namespace until we've finished merging
1569 // this namespace; loading it might load a later declaration of the
1570 // same namespace, and we have an invariant that older declarations
1571 // get merged before newer ones try to merge.
1572 GlobalDeclID AnonNamespace = 0;
1573 if (Redecl.getFirstID() == ThisDeclID) {
1574 AnonNamespace = readDeclID();
1575 } else {
1576 // Link this namespace back to the first declaration, which has already
1577 // been deserialized.
1578 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1579 }
1580
1581 mergeRedeclarable(D, Redecl);
1582
1583 if (AnonNamespace) {
1584 // Each module has its own anonymous namespace, which is disjoint from
1585 // any other module's anonymous namespaces, so don't attach the anonymous
1586 // namespace at all.
1587 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1588 if (!Record.isModule())
1589 D->setAnonymousNamespace(Anon);
1590 }
1591}
1592
1593void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1594 RedeclarableResult Redecl = VisitRedeclarable(D);
1595 VisitNamedDecl(D);
1596 D->NamespaceLoc = readSourceLocation();
1597 D->IdentLoc = readSourceLocation();
1598 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1599 D->Namespace = readDeclAs<NamedDecl>();
1600 mergeRedeclarable(D, Redecl);
1601}
1602
1603void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1604 VisitNamedDecl(D);
1605 D->setUsingLoc(readSourceLocation());
1606 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1607 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1608 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1609 D->setTypename(Record.readInt());
1610 if (auto *Pattern = readDeclAs<NamedDecl>())
1611 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1612 mergeMergeable(D);
1613}
1614
1615void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1616 VisitNamedDecl(D);
1617 D->InstantiatedFrom = readDeclAs<NamedDecl>();
1618 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1619 for (unsigned I = 0; I != D->NumExpansions; ++I)
1620 Expansions[I] = readDeclAs<NamedDecl>();
1621 mergeMergeable(D);
1622}
1623
1624void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1625 RedeclarableResult Redecl = VisitRedeclarable(D);
1626 VisitNamedDecl(D);
1627 D->Underlying = readDeclAs<NamedDecl>();
1628 D->IdentifierNamespace = Record.readInt();
1629 D->UsingOrNextShadow = readDeclAs<NamedDecl>();
1630 auto *Pattern = readDeclAs<UsingShadowDecl>();
1631 if (Pattern)
1632 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1633 mergeRedeclarable(D, Redecl);
1634}
1635
1636void ASTDeclReader::VisitConstructorUsingShadowDecl(
1637 ConstructorUsingShadowDecl *D) {
1638 VisitUsingShadowDecl(D);
1639 D->NominatedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1640 D->ConstructedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1641 D->IsVirtual = Record.readInt();
1642}
1643
1644void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1645 VisitNamedDecl(D);
1646 D->UsingLoc = readSourceLocation();
1647 D->NamespaceLoc = readSourceLocation();
1648 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1649 D->NominatedNamespace = readDeclAs<NamedDecl>();
1650 D->CommonAncestor = readDeclAs<DeclContext>();
1651}
1652
1653void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1654 VisitValueDecl(D);
1655 D->setUsingLoc(readSourceLocation());
1656 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1657 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1658 D->EllipsisLoc = readSourceLocation();
1659 mergeMergeable(D);
1660}
1661
1662void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1663 UnresolvedUsingTypenameDecl *D) {
1664 VisitTypeDecl(D);
1665 D->TypenameLocation = readSourceLocation();
1666 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1667 D->EllipsisLoc = readSourceLocation();
1668 mergeMergeable(D);
1669}
1670
1671void ASTDeclReader::ReadCXXDefinitionData(
1672 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1673 #define FIELD(Name, Width, Merge) \
1674 Data.Name = Record.readInt();
1675 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1676
1677 // Note: the caller has deserialized the IsLambda bit already.
1678 Data.ODRHash = Record.readInt();
1679 Data.HasODRHash = true;
1680
1681 if (Record.readInt())
1682 Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1683
1684 Data.NumBases = Record.readInt();
1685 if (Data.NumBases)
1686 Data.Bases = ReadGlobalOffset();
1687 Data.NumVBases = Record.readInt();
1688 if (Data.NumVBases)
1689 Data.VBases = ReadGlobalOffset();
1690
1691 Record.readUnresolvedSet(Data.Conversions);
1692 Data.ComputedVisibleConversions = Record.readInt();
1693 if (Data.ComputedVisibleConversions)
1694 Record.readUnresolvedSet(Data.VisibleConversions);
1695 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1695, __PRETTY_FUNCTION__))
;
1696 Data.FirstFriend = readDeclID();
1697
1698 if (Data.IsLambda) {
1699 using Capture = LambdaCapture;
1700
1701 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1702 Lambda.Dependent = Record.readInt();
1703 Lambda.IsGenericLambda = Record.readInt();
1704 Lambda.CaptureDefault = Record.readInt();
1705 Lambda.NumCaptures = Record.readInt();
1706 Lambda.NumExplicitCaptures = Record.readInt();
1707 Lambda.HasKnownInternalLinkage = Record.readInt();
1708 Lambda.ManglingNumber = Record.readInt();
1709 Lambda.ContextDecl = readDeclID();
1710 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1711 sizeof(Capture) * Lambda.NumCaptures);
1712 Capture *ToCapture = Lambda.Captures;
1713 Lambda.MethodTyInfo = readTypeSourceInfo();
1714 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1715 SourceLocation Loc = readSourceLocation();
1716 bool IsImplicit = Record.readInt();
1717 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1718 switch (Kind) {
1719 case LCK_StarThis:
1720 case LCK_This:
1721 case LCK_VLAType:
1722 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1723 break;
1724 case LCK_ByCopy:
1725 case LCK_ByRef:
1726 auto *Var = readDeclAs<VarDecl>();
1727 SourceLocation EllipsisLoc = readSourceLocation();
1728 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1729 break;
1730 }
1731 }
1732 }
1733}
1734
1735void ASTDeclReader::MergeDefinitionData(
1736 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1737 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1738, __PRETTY_FUNCTION__))
1738 "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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1738, __PRETTY_FUNCTION__))
;
1739 auto &DD = *D->DefinitionData;
1740
1741 if (DD.Definition != MergeDD.Definition) {
1742 // Track that we merged the definitions.
1743 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1744 DD.Definition));
1745 Reader.PendingDefinitions.erase(MergeDD.Definition);
1746 MergeDD.Definition->setCompleteDefinition(false);
1747 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1748 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1749, __PRETTY_FUNCTION__))
1749 "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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1749, __PRETTY_FUNCTION__))
;
1750 }
1751
1752 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1753 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1754 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1755 // We faked up this definition data because we found a class for which we'd
1756 // not yet loaded the definition. Replace it with the real thing now.
1757 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1757, __PRETTY_FUNCTION__))
;
1758 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1759
1760 // Don't change which declaration is the definition; that is required
1761 // to be invariant once we select it.
1762 auto *Def = DD.Definition;
1763 DD = std::move(MergeDD);
1764 DD.Definition = Def;
1765 return;
1766 }
1767
1768 bool DetectedOdrViolation = false;
1769
1770 #define FIELD(Name, Width, Merge) Merge(Name)
1771 #define MERGE_OR(Field) DD.Field |= MergeDD.Field;
1772 #define NO_MERGE(Field) \
1773 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1774 MERGE_OR(Field)
1775 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1776 NO_MERGE(IsLambda)
1777 #undef NO_MERGE
1778 #undef MERGE_OR
1779
1780 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1781 DetectedOdrViolation = true;
1782 // FIXME: Issue a diagnostic if the base classes don't match when we come
1783 // to lazily load them.
1784
1785 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1786 // match when we come to lazily load them.
1787 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1788 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1789 DD.ComputedVisibleConversions = true;
1790 }
1791
1792 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1793 // lazily load it.
1794
1795 if (DD.IsLambda) {
1796 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1797 // when they occur within the body of a function template specialization).
1798 }
1799
1800 if (D->getODRHash() != MergeDD.ODRHash) {
1801 DetectedOdrViolation = true;
1802 }
1803
1804 if (DetectedOdrViolation)
1805 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1806 {MergeDD.Definition, &MergeDD});
1807}
1808
1809void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1810 struct CXXRecordDecl::DefinitionData *DD;
1811 ASTContext &C = Reader.getContext();
1812
1813 // Determine whether this is a lambda closure type, so that we can
1814 // allocate the appropriate DefinitionData structure.
1815 bool IsLambda = Record.readInt();
1816 if (IsLambda)
1817 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1818 LCD_None);
1819 else
1820 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1821
1822 CXXRecordDecl *Canon = D->getCanonicalDecl();
1823 // Set decl definition data before reading it, so that during deserialization
1824 // when we read CXXRecordDecl, it already has definition data and we don't
1825 // set fake one.
1826 if (!Canon->DefinitionData)
1827 Canon->DefinitionData = DD;
1828 D->DefinitionData = Canon->DefinitionData;
1829 ReadCXXDefinitionData(*DD, D);
1830
1831 // We might already have a different definition for this record. This can
1832 // happen either because we're reading an update record, or because we've
1833 // already done some merging. Either way, just merge into it.
1834 if (Canon->DefinitionData != DD) {
1835 MergeDefinitionData(Canon, std::move(*DD));
1836 return;
1837 }
1838
1839 // Mark this declaration as being a definition.
1840 D->setCompleteDefinition(true);
1841
1842 // If this is not the first declaration or is an update record, we can have
1843 // other redeclarations already. Make a note that we need to propagate the
1844 // DefinitionData pointer onto them.
1845 if (Update || Canon != D)
1846 Reader.PendingDefinitions.insert(D);
1847}
1848
1849ASTDeclReader::RedeclarableResult
1850ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1851 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1852
1853 ASTContext &C = Reader.getContext();
1854
1855 enum CXXRecKind {
1856 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1857 };
1858 switch ((CXXRecKind)Record.readInt()) {
1859 case CXXRecNotTemplate:
1860 // Merged when we merge the folding set entry in the primary template.
1861 if (!isa<ClassTemplateSpecializationDecl>(D))
1862 mergeRedeclarable(D, Redecl);
1863 break;
1864 case CXXRecTemplate: {
1865 // Merged when we merge the template.
1866 auto *Template = readDeclAs<ClassTemplateDecl>();
1867 D->TemplateOrInstantiation = Template;
1868 if (!Template->getTemplatedDecl()) {
1869 // We've not actually loaded the ClassTemplateDecl yet, because we're
1870 // currently being loaded as its pattern. Rely on it to set up our
1871 // TypeForDecl (see VisitClassTemplateDecl).
1872 //
1873 // Beware: we do not yet know our canonical declaration, and may still
1874 // get merged once the surrounding class template has got off the ground.
1875 DeferredTypeID = 0;
1876 }
1877 break;
1878 }
1879 case CXXRecMemberSpecialization: {
1880 auto *RD = readDeclAs<CXXRecordDecl>();
1881 auto TSK = (TemplateSpecializationKind)Record.readInt();
1882 SourceLocation POI = readSourceLocation();
1883 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1884 MSI->setPointOfInstantiation(POI);
1885 D->TemplateOrInstantiation = MSI;
1886 mergeRedeclarable(D, Redecl);
1887 break;
1888 }
1889 }
1890
1891 bool WasDefinition = Record.readInt();
1892 if (WasDefinition)
1893 ReadCXXRecordDefinition(D, /*Update*/false);
1894 else
1895 // Propagate DefinitionData pointer from the canonical declaration.
1896 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1897
1898 // Lazily load the key function to avoid deserializing every method so we can
1899 // compute it.
1900 if (WasDefinition) {
1901 DeclID KeyFn = readDeclID();
1902 if (KeyFn && D->isCompleteDefinition())
1903 // FIXME: This is wrong for the ARM ABI, where some other module may have
1904 // made this function no longer be a key function. We need an update
1905 // record or similar for that case.
1906 C.KeyFunctions[D] = KeyFn;
1907 }
1908
1909 return Redecl;
1910}
1911
1912void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1913 D->setExplicitSpecifier(Record.readExplicitSpec());
1914 VisitFunctionDecl(D);
1915 D->setIsCopyDeductionCandidate(Record.readInt());
1916}
1917
1918void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1919 VisitFunctionDecl(D);
1920
1921 unsigned NumOverridenMethods = Record.readInt();
1922 if (D->isCanonicalDecl()) {
1923 while (NumOverridenMethods--) {
1924 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1925 // MD may be initializing.
1926 if (auto *MD = readDeclAs<CXXMethodDecl>())
1927 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1928 }
1929 } else {
1930 // We don't care about which declarations this used to override; we get
1931 // the relevant information from the canonical declaration.
1932 Record.skipInts(NumOverridenMethods);
1933 }
1934}
1935
1936void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1937 // We need the inherited constructor information to merge the declaration,
1938 // so we have to read it before we call VisitCXXMethodDecl.
1939 D->setExplicitSpecifier(Record.readExplicitSpec());
1940 if (D->isInheritingConstructor()) {
1941 auto *Shadow = readDeclAs<ConstructorUsingShadowDecl>();
1942 auto *Ctor = readDeclAs<CXXConstructorDecl>();
1943 *D->getTrailingObjects<InheritedConstructor>() =
1944 InheritedConstructor(Shadow, Ctor);
1945 }
1946
1947 VisitCXXMethodDecl(D);
1948}
1949
1950void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1951 VisitCXXMethodDecl(D);
1952
1953 if (auto *OperatorDelete = readDeclAs<FunctionDecl>()) {
1954 CXXDestructorDecl *Canon = D->getCanonicalDecl();
1955 auto *ThisArg = Record.readExpr();
1956 // FIXME: Check consistency if we have an old and new operator delete.
1957 if (!Canon->OperatorDelete) {
1958 Canon->OperatorDelete = OperatorDelete;
1959 Canon->OperatorDeleteThisArg = ThisArg;
1960 }
1961 }
1962}
1963
1964void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1965 D->setExplicitSpecifier(Record.readExplicitSpec());
1966 VisitCXXMethodDecl(D);
1967}
1968
1969void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1970 VisitDecl(D);
1971 D->ImportedAndComplete.setPointer(readModule());
1972 D->ImportedAndComplete.setInt(Record.readInt());
1973 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
1974 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1975 StoredLocs[I] = readSourceLocation();
1976 Record.skipInts(1); // The number of stored source locations.
1977}
1978
1979void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1980 VisitDecl(D);
1981 D->setColonLoc(readSourceLocation());
1982}
1983
1984void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1985 VisitDecl(D);
1986 if (Record.readInt()) // hasFriendDecl
1987 D->Friend = readDeclAs<NamedDecl>();
1988 else
1989 D->Friend = readTypeSourceInfo();
1990 for (unsigned i = 0; i != D->NumTPLists; ++i)
1991 D->getTrailingObjects<TemplateParameterList *>()[i] =
1992 Record.readTemplateParameterList();
1993 D->NextFriend = readDeclID();
1994 D->UnsupportedFriend = (Record.readInt() != 0);
1995 D->FriendLoc = readSourceLocation();
1996}
1997
1998void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1999 VisitDecl(D);
2000 unsigned NumParams = Record.readInt();
2001 D->NumParams = NumParams;
2002 D->Params = new TemplateParameterList*[NumParams];
2003 for (unsigned i = 0; i != NumParams; ++i)
2004 D->Params[i] = Record.readTemplateParameterList();
2005 if (Record.readInt()) // HasFriendDecl
2006 D->Friend = readDeclAs<NamedDecl>();
2007 else
2008 D->Friend = readTypeSourceInfo();
2009 D->FriendLoc = readSourceLocation();
2010}
2011
2012DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2013 VisitNamedDecl(D);
2014
2015 DeclID PatternID = readDeclID();
2016 auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2017 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2018 D->init(TemplatedDecl, TemplateParams);
2019
2020 return PatternID;
2021}
2022
2023void ASTDeclReader::VisitConceptDecl(ConceptDecl *D) {
2024 VisitTemplateDecl(D);
2025 D->ConstraintExpr = Record.readExpr();
2026 mergeMergeable(D);
2027}
2028
2029void ASTDeclReader::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) {
2030}
2031
2032ASTDeclReader::RedeclarableResult
2033ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2034 RedeclarableResult Redecl = VisitRedeclarable(D);
2035
2036 // Make sure we've allocated the Common pointer first. We do this before
2037 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2038 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2039 if (!CanonD->Common) {
2040 CanonD->Common = CanonD->newCommon(Reader.getContext());
2041 Reader.PendingDefinitions.insert(CanonD);
2042 }
2043 D->Common = CanonD->Common;
2044
2045 // If this is the first declaration of the template, fill in the information
2046 // for the 'common' pointer.
2047 if (ThisDeclID == Redecl.getFirstID()) {
2048 if (auto *RTD = readDeclAs<RedeclarableTemplateDecl>()) {
2049 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2050, __PRETTY_FUNCTION__))
2050 "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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2050, __PRETTY_FUNCTION__))
;
2051 D->setInstantiatedFromMemberTemplate(RTD);
2052 if (Record.readInt())
2053 D->setMemberSpecialization();
2054 }
2055 }
2056
2057 DeclID PatternID = VisitTemplateDecl(D);
2058 D->IdentifierNamespace = Record.readInt();
2059
2060 mergeRedeclarable(D, Redecl, PatternID);
2061
2062 // If we merged the template with a prior declaration chain, merge the common
2063 // pointer.
2064 // FIXME: Actually merge here, don't just overwrite.
2065 D->Common = D->getCanonicalDecl()->Common;
2066
2067 return Redecl;
2068}
2069
2070void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2071 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2072
2073 if (ThisDeclID == Redecl.getFirstID()) {
2074 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2075 // the specializations.
2076 SmallVector<serialization::DeclID, 32> SpecIDs;
2077 readDeclIDList(SpecIDs);
2078 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2079 }
2080
2081 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2082 // We were loaded before our templated declaration was. We've not set up
2083 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2084 // it now.
2085 Reader.getContext().getInjectedClassNameType(
2086 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2087 }
2088}
2089
2090void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2091 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2091)
;
2092}
2093
2094/// TODO: Unify with ClassTemplateDecl version?
2095/// May require unifying ClassTemplateDecl and
2096/// VarTemplateDecl beyond TemplateDecl...
2097void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2098 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2099
2100 if (ThisDeclID == Redecl.getFirstID()) {
2101 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2102 // the specializations.
2103 SmallVector<serialization::DeclID, 32> SpecIDs;
2104 readDeclIDList(SpecIDs);
2105 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2106 }
2107}
2108
2109ASTDeclReader::RedeclarableResult
2110ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2111 ClassTemplateSpecializationDecl *D) {
2112 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2113
2114 ASTContext &C = Reader.getContext();
2115 if (Decl *InstD = readDecl()) {
2116 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2117 D->SpecializedTemplate = CTD;
2118 } else {
2119 SmallVector<TemplateArgument, 8> TemplArgs;
2120 Record.readTemplateArgumentList(TemplArgs);
2121 TemplateArgumentList *ArgList
2122 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2123 auto *PS =
2124 new (C) ClassTemplateSpecializationDecl::
2125 SpecializedPartialSpecialization();
2126 PS->PartialSpecialization
2127 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2128 PS->TemplateArgs = ArgList;
2129 D->SpecializedTemplate = PS;
2130 }
2131 }
2132
2133 SmallVector<TemplateArgument, 8> TemplArgs;
2134 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2135 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2136 D->PointOfInstantiation = readSourceLocation();
2137 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2138
2139 bool writtenAsCanonicalDecl = Record.readInt();
2140 if (writtenAsCanonicalDecl) {
2141 auto *CanonPattern = readDeclAs<ClassTemplateDecl>();
2142 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2143 // Set this as, or find, the canonical declaration for this specialization
2144 ClassTemplateSpecializationDecl *CanonSpec;
2145 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2146 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2147 .GetOrInsertNode(Partial);
2148 } else {
2149 CanonSpec =
2150 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2151 }
2152 // If there was already a canonical specialization, merge into it.
2153 if (CanonSpec != D) {
2154 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2155
2156 // This declaration might be a definition. Merge with any existing
2157 // definition.
2158 if (auto *DDD = D->DefinitionData) {
2159 if (CanonSpec->DefinitionData)
2160 MergeDefinitionData(CanonSpec, std::move(*DDD));
2161 else
2162 CanonSpec->DefinitionData = D->DefinitionData;
2163 }
2164 D->DefinitionData = CanonSpec->DefinitionData;
2165 }
2166 }
2167 }
2168
2169 // Explicit info.
2170 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2171 auto *ExplicitInfo =
2172 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2173 ExplicitInfo->TypeAsWritten = TyInfo;
2174 ExplicitInfo->ExternLoc = readSourceLocation();
2175 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2176 D->ExplicitInfo = ExplicitInfo;
2177 }
2178
2179 return Redecl;
2180}
2181
2182void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2183 ClassTemplatePartialSpecializationDecl *D) {
2184 // We need to read the template params first because redeclarable is going to
2185 // need them for profiling
2186 TemplateParameterList *Params = Record.readTemplateParameterList();
2187 D->TemplateParams = Params;
2188 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2189
2190 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2191
2192 // These are read/set from/to the first declaration.
2193 if (ThisDeclID == Redecl.getFirstID()) {
2194 D->InstantiatedFromMember.setPointer(
2195 readDeclAs<ClassTemplatePartialSpecializationDecl>());
2196 D->InstantiatedFromMember.setInt(Record.readInt());
2197 }
2198}
2199
2200void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2201 ClassScopeFunctionSpecializationDecl *D) {
2202 VisitDecl(D);
2203 D->Specialization = readDeclAs<CXXMethodDecl>();
2204 if (Record.readInt())
2205 D->TemplateArgs = Record.readASTTemplateArgumentListInfo();
2206}
2207
2208void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2209 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2210
2211 if (ThisDeclID == Redecl.getFirstID()) {
2212 // This FunctionTemplateDecl owns a CommonPtr; read it.
2213 SmallVector<serialization::DeclID, 32> SpecIDs;
2214 readDeclIDList(SpecIDs);
2215 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2216 }
2217}
2218
2219/// TODO: Unify with ClassTemplateSpecializationDecl version?
2220/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2221/// VarTemplate(Partial)SpecializationDecl with a new data
2222/// structure Template(Partial)SpecializationDecl, and
2223/// using Template(Partial)SpecializationDecl as input type.
2224ASTDeclReader::RedeclarableResult
2225ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2226 VarTemplateSpecializationDecl *D) {
2227 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2228
2229 ASTContext &C = Reader.getContext();
2230 if (Decl *InstD = readDecl()) {
2231 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2232 D->SpecializedTemplate = VTD;
2233 } else {
2234 SmallVector<TemplateArgument, 8> TemplArgs;
2235 Record.readTemplateArgumentList(TemplArgs);
2236 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2237 C, TemplArgs);
2238 auto *PS =
2239 new (C)
2240 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2241 PS->PartialSpecialization =
2242 cast<VarTemplatePartialSpecializationDecl>(InstD);
2243 PS->TemplateArgs = ArgList;
2244 D->SpecializedTemplate = PS;
2245 }
2246 }
2247
2248 // Explicit info.
2249 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2250 auto *ExplicitInfo =
2251 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2252 ExplicitInfo->TypeAsWritten = TyInfo;
2253 ExplicitInfo->ExternLoc = readSourceLocation();
2254 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2255 D->ExplicitInfo = ExplicitInfo;
2256 }
2257
2258 SmallVector<TemplateArgument, 8> TemplArgs;
2259 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2260 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2261 D->PointOfInstantiation = readSourceLocation();
2262 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2263 D->IsCompleteDefinition = Record.readInt();
2264
2265 bool writtenAsCanonicalDecl = Record.readInt();
2266 if (writtenAsCanonicalDecl) {
2267 auto *CanonPattern = readDeclAs<VarTemplateDecl>();
2268 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2269 // FIXME: If it's already present, merge it.
2270 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2271 CanonPattern->getCommonPtr()->PartialSpecializations
2272 .GetOrInsertNode(Partial);
2273 } else {
2274 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2275 }
2276 }
2277 }
2278
2279 return Redecl;
2280}
2281
2282/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2283/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2284/// VarTemplate(Partial)SpecializationDecl with a new data
2285/// structure Template(Partial)SpecializationDecl, and
2286/// using Template(Partial)SpecializationDecl as input type.
2287void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2288 VarTemplatePartialSpecializationDecl *D) {
2289 TemplateParameterList *Params = Record.readTemplateParameterList();
2290 D->TemplateParams = Params;
2291 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2292
2293 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2294
2295 // These are read/set from/to the first declaration.
2296 if (ThisDeclID == Redecl.getFirstID()) {
2297 D->InstantiatedFromMember.setPointer(
2298 readDeclAs<VarTemplatePartialSpecializationDecl>());
2299 D->InstantiatedFromMember.setInt(Record.readInt());
2300 }
2301}
2302
2303void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2304 VisitTypeDecl(D);
2305
2306 D->setDeclaredWithTypename(Record.readInt());
2307
2308 if (Record.readBool()) {
2309 NestedNameSpecifierLoc NNS = Record.readNestedNameSpecifierLoc();
2310 DeclarationNameInfo DN = Record.readDeclarationNameInfo();
2311 ConceptDecl *NamedConcept = Record.readDeclAs<ConceptDecl>();
2312 const ASTTemplateArgumentListInfo *ArgsAsWritten = nullptr;
2313 if (Record.readBool())
2314 ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2315 Expr *ImmediatelyDeclaredConstraint = Record.readExpr();
2316 D->setTypeConstraint(NNS, DN, /*FoundDecl=*/nullptr, NamedConcept,
2317 ArgsAsWritten, ImmediatelyDeclaredConstraint);
2318 if ((D->ExpandedParameterPack = Record.readInt()))
2319 D->NumExpanded = Record.readInt();
2320 }
2321
2322 if (Record.readInt())
2323 D->setDefaultArgument(readTypeSourceInfo());
2324}
2325
2326void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2327 VisitDeclaratorDecl(D);
2328 // TemplateParmPosition.
2329 D->setDepth(Record.readInt());
2330 D->setPosition(Record.readInt());
2331 if (D->hasPlaceholderTypeConstraint())
2332 D->setPlaceholderTypeConstraint(Record.readExpr());
2333 if (D->isExpandedParameterPack()) {
2334 auto TypesAndInfos =
2335 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2336 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2337 new (&TypesAndInfos[I].first) QualType(Record.readType());
2338 TypesAndInfos[I].second = readTypeSourceInfo();
2339 }
2340 } else {
2341 // Rest of NonTypeTemplateParmDecl.
2342 D->ParameterPack = Record.readInt();
2343 if (Record.readInt())
2344 D->setDefaultArgument(Record.readExpr());
2345 }
2346}
2347
2348void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2349 VisitTemplateDecl(D);
2350 // TemplateParmPosition.
2351 D->setDepth(Record.readInt());
2352 D->setPosition(Record.readInt());
2353 if (D->isExpandedParameterPack()) {
2354 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2355 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2356 I != N; ++I)
2357 Data[I] = Record.readTemplateParameterList();
2358 } else {
2359 // Rest of TemplateTemplateParmDecl.
2360 D->ParameterPack = Record.readInt();
2361 if (Record.readInt())
2362 D->setDefaultArgument(Reader.getContext(),
2363 Record.readTemplateArgumentLoc());
2364 }
2365}
2366
2367void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2368 VisitRedeclarableTemplateDecl(D);
2369}
2370
2371void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2372 VisitDecl(D);
2373 D->AssertExprAndFailed.setPointer(Record.readExpr());
2374 D->AssertExprAndFailed.setInt(Record.readInt());
2375 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2376 D->RParenLoc = readSourceLocation();
2377}
2378
2379void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2380 VisitDecl(D);
2381}
2382
2383void ASTDeclReader::VisitLifetimeExtendedTemporaryDecl(
2384 LifetimeExtendedTemporaryDecl *D) {
2385 VisitDecl(D);
2386 D->ExtendingDecl = readDeclAs<ValueDecl>();
2387 D->ExprWithTemporary = Record.readStmt();
2388 if (Record.readInt())
2389 D->Value = new (D->getASTContext()) APValue(Record.readAPValue());
2390 D->ManglingNumber = Record.readInt();
2391 mergeMergeable(D);
2392}
2393
2394std::pair<uint64_t, uint64_t>
2395ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2396 uint64_t LexicalOffset = ReadLocalOffset();
2397 uint64_t VisibleOffset = ReadLocalOffset();
2398 return std::make_pair(LexicalOffset, VisibleOffset);
2399}
2400
2401template <typename T>
2402ASTDeclReader::RedeclarableResult
2403ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2404 DeclID FirstDeclID = readDeclID();
2405 Decl *MergeWith = nullptr;
2406
2407 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2408 bool IsFirstLocalDecl = false;
2409
2410 uint64_t RedeclOffset = 0;
2411
2412 // 0 indicates that this declaration was the only declaration of its entity,
2413 // and is used for space optimization.
2414 if (FirstDeclID == 0) {
2415 FirstDeclID = ThisDeclID;
2416 IsKeyDecl = true;
2417 IsFirstLocalDecl = true;
2418 } else if (unsigned N = Record.readInt()) {
2419 // This declaration was the first local declaration, but may have imported
2420 // other declarations.
2421 IsKeyDecl = N == 1;
2422 IsFirstLocalDecl = true;
2423
2424 // We have some declarations that must be before us in our redeclaration
2425 // chain. Read them now, and remember that we ought to merge with one of
2426 // them.
2427 // FIXME: Provide a known merge target to the second and subsequent such
2428 // declaration.
2429 for (unsigned I = 0; I != N - 1; ++I)
2430 MergeWith = readDecl();
2431
2432 RedeclOffset = ReadLocalOffset();
2433 } else {
2434 // This declaration was not the first local declaration. Read the first
2435 // local declaration now, to trigger the import of other redeclarations.
2436 (void)readDecl();
2437 }
2438
2439 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2440 if (FirstDecl != D) {
2441 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2442 // We temporarily set the first (canonical) declaration as the previous one
2443 // which is the one that matters and mark the real previous DeclID to be
2444 // loaded & attached later on.
2445 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2446 D->First = FirstDecl->getCanonicalDecl();
2447 }
2448
2449 auto *DAsT = static_cast<T *>(D);
2450
2451 // Note that we need to load local redeclarations of this decl and build a
2452 // decl chain for them. This must happen *after* we perform the preloading
2453 // above; this ensures that the redeclaration chain is built in the correct
2454 // order.
2455 if (IsFirstLocalDecl)
2456 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2457
2458 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2459}
2460
2461/// Attempts to merge the given declaration (D) with another declaration
2462/// of the same entity.
2463template<typename T>
2464void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2465 RedeclarableResult &Redecl,
2466 DeclID TemplatePatternID) {
2467 // If modules are not available, there is no reason to perform this merge.
2468 if (!Reader.getContext().getLangOpts().Modules)
2469 return;
2470
2471 // If we're not the canonical declaration, we don't need to merge.
2472 if (!DBase->isFirstDecl())
2473 return;
2474
2475 auto *D = static_cast<T *>(DBase);
2476
2477 if (auto *Existing = Redecl.getKnownMergeTarget())
2478 // We already know of an existing declaration we should merge with.
2479 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2480 else if (FindExistingResult ExistingRes = findExisting(D))
2481 if (T *Existing = ExistingRes)
2482 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2483}
2484
2485/// "Cast" to type T, asserting if we don't have an implicit conversion.
2486/// We use this to put code in a template that will only be valid for certain
2487/// instantiations.
2488template<typename T> static T assert_cast(T t) { return t; }
2489template<typename T> static T assert_cast(...) {
2490 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2490)
;
2491}
2492
2493/// Merge together the pattern declarations from two template
2494/// declarations.
2495void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2496 RedeclarableTemplateDecl *Existing,
2497 DeclID DsID, bool IsKeyDecl) {
2498 auto *DPattern = D->getTemplatedDecl();
2499 auto *ExistingPattern = Existing->getTemplatedDecl();
2500 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2501 DPattern->getCanonicalDecl()->getGlobalID(),
2502 IsKeyDecl);
2503
2504 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2505 // Merge with any existing definition.
2506 // FIXME: This is duplicated in several places. Refactor.
2507 auto *ExistingClass =
2508 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2509 if (auto *DDD = DClass->DefinitionData) {
2510 if (ExistingClass->DefinitionData) {
2511 MergeDefinitionData(ExistingClass, std::move(*DDD));
2512 } else {
2513 ExistingClass->DefinitionData = DClass->DefinitionData;
2514 // We may have skipped this before because we thought that DClass
2515 // was the canonical declaration.
2516 Reader.PendingDefinitions.insert(DClass);
2517 }
2518 }
2519 DClass->DefinitionData = ExistingClass->DefinitionData;
2520
2521 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2522 Result);
2523 }
2524 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2525 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2526 Result);
2527 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2528 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2529 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2530 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2531 Result);
2532 llvm_unreachable("merged an unknown kind of redeclarable template")::llvm::llvm_unreachable_internal("merged an unknown kind of redeclarable template"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2532)
;
2533}
2534
2535/// Attempts to merge the given declaration (D) with another declaration
2536/// of the same entity.
2537template<typename T>
2538void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2539 RedeclarableResult &Redecl,
2540 DeclID TemplatePatternID) {
2541 auto *D = static_cast<T *>(DBase);
2542 T *ExistingCanon = Existing->getCanonicalDecl();
2543 T *DCanon = D->getCanonicalDecl();
2544 if (ExistingCanon != DCanon) {
2545 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2546, __PRETTY_FUNCTION__))
2546 "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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2546, __PRETTY_FUNCTION__))
;
2547
2548 // Have our redeclaration link point back at the canonical declaration
2549 // of the existing declaration, so that this declaration has the
2550 // appropriate canonical declaration.
2551 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2552 D->First = ExistingCanon;
2553 ExistingCanon->Used |= D->Used;
2554 D->Used = false;
2555
2556 // When we merge a namespace, update its pointer to the first namespace.
2557 // We cannot have loaded any redeclarations of this declaration yet, so
2558 // there's nothing else that needs to be updated.
2559 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2560 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2561 assert_cast<NamespaceDecl*>(ExistingCanon));
2562
2563 // When we merge a template, merge its pattern.
2564 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2565 mergeTemplatePattern(
2566 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2567 TemplatePatternID, Redecl.isKeyDecl());
2568
2569 // If this declaration is a key declaration, make a note of that.
2570 if (Redecl.isKeyDecl())
2571 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2572 }
2573}
2574
2575/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2576/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2577/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2578/// that some types are mergeable during deserialization, otherwise name
2579/// lookup fails. This is the case for EnumConstantDecl.
2580static bool allowODRLikeMergeInC(NamedDecl *ND) {
2581 if (!ND)
2582 return false;
2583 // TODO: implement merge for other necessary decls.
2584 if (isa<EnumConstantDecl>(ND))
2585 return true;
2586 return false;
2587}
2588
2589/// Attempts to merge LifetimeExtendedTemporaryDecl with
2590/// identical class definitions from two different modules.
2591void ASTDeclReader::mergeMergeable(LifetimeExtendedTemporaryDecl *D) {
2592 // If modules are not available, there is no reason to perform this merge.
2593 if (!Reader.getContext().getLangOpts().Modules)
2594 return;
2595
2596 LifetimeExtendedTemporaryDecl *LETDecl = D;
2597
2598 LifetimeExtendedTemporaryDecl *&LookupResult =
2599 Reader.LETemporaryForMerging[std::make_pair(
2600 LETDecl->getExtendingDecl(), LETDecl->getManglingNumber())];
2601 if (LookupResult)
2602 Reader.getContext().setPrimaryMergedDecl(LETDecl,
2603 LookupResult->getCanonicalDecl());
2604 else
2605 LookupResult = LETDecl;
2606}
2607
2608/// Attempts to merge the given declaration (D) with another declaration
2609/// of the same entity, for the case where the entity is not actually
2610/// redeclarable. This happens, for instance, when merging the fields of
2611/// identical class definitions from two different modules.
2612template<typename T>
2613void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2614 // If modules are not available, there is no reason to perform this merge.
2615 if (!Reader.getContext().getLangOpts().Modules)
2616 return;
2617
2618 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2619 // Note that C identically-named things in different translation units are
2620 // not redeclarations, but may still have compatible types, where ODR-like
2621 // semantics may apply.
2622 if (!Reader.getContext().getLangOpts().CPlusPlus &&
2623 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2624 return;
2625
2626 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2627 if (T *Existing = ExistingRes)
2628 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2629 Existing->getCanonicalDecl());
2630}
2631
2632void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2633 VisitDecl(D);
2634 unsigned NumVars = D->varlist_size();
2635 SmallVector<Expr *, 16> Vars;
2636 Vars.reserve(NumVars);
2637 for (unsigned i = 0; i != NumVars; ++i) {
2638 Vars.push_back(Record.readExpr());
2639 }
2640 D->setVars(Vars);
2641}
2642
2643void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2644 VisitDecl(D);
2645 unsigned NumVars = D->varlist_size();
2646 unsigned NumClauses = D->clauselist_size();
2647 SmallVector<Expr *, 16> Vars;
2648 Vars.reserve(NumVars);
2649 for (unsigned i = 0; i != NumVars; ++i) {
2650 Vars.push_back(Record.readExpr());
2651 }
2652 D->setVars(Vars);
2653 SmallVector<OMPClause *, 8> Clauses;
2654 Clauses.reserve(NumClauses);
2655 for (unsigned I = 0; I != NumClauses; ++I)
2656 Clauses.push_back(Record.readOMPClause());
2657 D->setClauses(Clauses);
2658}
2659
2660void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
2661 VisitDecl(D);
2662 unsigned NumClauses = D->clauselist_size();
2663 SmallVector<OMPClause *, 8> Clauses;
2664 Clauses.reserve(NumClauses);
2665 for (unsigned I = 0; I != NumClauses; ++I)
2666 Clauses.push_back(Record.readOMPClause());
2667 D->setClauses(Clauses);
2668}
2669
2670void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2671 VisitValueDecl(D);
2672 D->setLocation(readSourceLocation());
2673 Expr *In = Record.readExpr();
2674 Expr *Out = Record.readExpr();
2675 D->setCombinerData(In, Out);
2676 Expr *Combiner = Record.readExpr();
2677 D->setCombiner(Combiner);
2678 Expr *Orig = Record.readExpr();
2679 Expr *Priv = Record.readExpr();
2680 D->setInitializerData(Orig, Priv);
2681 Expr *Init = Record.readExpr();
2682 auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2683 D->setInitializer(Init, IK);
2684 D->PrevDeclInScope = readDeclID();
2685}
2686
2687void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2688 VisitValueDecl(D);
2689 D->setLocation(readSourceLocation());
2690 Expr *MapperVarRefE = Record.readExpr();
2691 D->setMapperVarRef(MapperVarRefE);
2692 D->VarName = Record.readDeclarationName();
2693 D->PrevDeclInScope = readDeclID();
2694 unsigned NumClauses = D->clauselist_size();
2695 SmallVector<OMPClause *, 8> Clauses;
2696 Clauses.reserve(NumClauses);
2697 for (unsigned I = 0; I != NumClauses; ++I)
2698 Clauses.push_back(Record.readOMPClause());
2699 D->setClauses(Clauses);
2700}
2701
2702void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2703 VisitVarDecl(D);
2704}
2705
2706//===----------------------------------------------------------------------===//
2707// Attribute Reading
2708//===----------------------------------------------------------------------===//
2709
2710namespace {
2711class AttrReader {
2712 ASTRecordReader &Reader;
2713
2714public:
2715 AttrReader(ASTRecordReader &Reader) : Reader(Reader) {}
2716
2717 uint64_t readInt() {
2718 return Reader.readInt();
2719 }
2720
2721 SourceRange readSourceRange() {
2722 return Reader.readSourceRange();
2723 }
2724
2725 SourceLocation readSourceLocation() {
2726 return Reader.readSourceLocation();
2727 }
2728
2729 Expr *readExpr() { return Reader.readExpr(); }
2730
2731 std::string readString() {
2732 return Reader.readString();
2733 }
2734
2735 TypeSourceInfo *readTypeSourceInfo() {
2736 return Reader.readTypeSourceInfo();
2737 }
2738
2739 IdentifierInfo *readIdentifier() {
2740 return Reader.readIdentifier();
2741 }
2742
2743 VersionTuple readVersionTuple() {
2744 return Reader.readVersionTuple();
2745 }
2746
2747 OMPTraitInfo readOMPTraitInfo() { return Reader.readOMPTraitInfo(); }
2748
2749 template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2750 return Reader.GetLocalDeclAs<T>(LocalID);
2751 }
2752};
2753}
2754
2755Attr *ASTRecordReader::readAttr() {
2756 AttrReader Record(*this);
2757 auto V = Record.readInt();
2758 if (!V)
2759 return nullptr;
2760
2761 Attr *New = nullptr;
2762 // Kind is stored as a 1-based integer because 0 is used to indicate a null
2763 // Attr pointer.
2764 auto Kind = static_cast<attr::Kind>(V - 1);
2765 ASTContext &Context = getContext();
2766
2767 IdentifierInfo *AttrName = Record.readIdentifier();
2768 IdentifierInfo *ScopeName = Record.readIdentifier();
2769 SourceRange AttrRange = Record.readSourceRange();
2770 SourceLocation ScopeLoc = Record.readSourceLocation();
2771 unsigned ParsedKind = Record.readInt();
2772 unsigned Syntax = Record.readInt();
2773 unsigned SpellingIndex = Record.readInt();
2774
2775 AttributeCommonInfo Info(AttrName, ScopeName, AttrRange, ScopeLoc,
2776 AttributeCommonInfo::Kind(ParsedKind),
2777 AttributeCommonInfo::Syntax(Syntax), SpellingIndex);
2778
2779#include "clang/Serialization/AttrPCHRead.inc"
2780
2781 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2781, __PRETTY_FUNCTION__))
;
2782 return New;
2783}
2784
2785/// Reads attributes from the current stream position.
2786void ASTRecordReader::readAttributes(AttrVec &Attrs) {
2787 for (unsigned I = 0, E = readInt(); I != E; ++I)
2788 Attrs.push_back(readAttr());
2789}
2790
2791//===----------------------------------------------------------------------===//
2792// ASTReader Implementation
2793//===----------------------------------------------------------------------===//
2794
2795/// Note that we have loaded the declaration with the given
2796/// Index.
2797///
2798/// This routine notes that this declaration has already been loaded,
2799/// so that future GetDecl calls will return this declaration rather
2800/// than trying to load a new declaration.
2801inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2802 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2802, __PRETTY_FUNCTION__))
;
2803 DeclsLoaded[Index] = D;
2804}
2805
2806/// Determine whether the consumer will be interested in seeing
2807/// this declaration (via HandleTopLevelDecl).
2808///
2809/// This routine should return true for anything that might affect
2810/// code generation, e.g., inline function definitions, Objective-C
2811/// declarations with metadata, etc.
2812static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2813 // An ObjCMethodDecl is never considered as "interesting" because its
2814 // implementation container always is.
2815
2816 // An ImportDecl or VarDecl imported from a module map module will get
2817 // emitted when we import the relevant module.
2818 if (isPartOfPerModuleInitializer(D)) {
2819 auto *M = D->getImportedOwningModule();
2820 if (M && M->Kind == Module::ModuleMapModule &&
2821 Ctx.DeclMustBeEmitted(D))
2822 return false;
2823 }
2824
2825 if (isa<FileScopeAsmDecl>(D) ||
2826 isa<ObjCProtocolDecl>(D) ||
2827 isa<ObjCImplDecl>(D) ||
2828 isa<ImportDecl>(D) ||
2829 isa<PragmaCommentDecl>(D) ||
2830 isa<PragmaDetectMismatchDecl>(D))
2831 return true;
2832 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2833 isa<OMPDeclareMapperDecl>(D) || isa<OMPAllocateDecl>(D) ||
2834 isa<OMPRequiresDecl>(D))
2835 return !D->getDeclContext()->isFunctionOrMethod();
2836 if (const auto *Var = dyn_cast<VarDecl>(D))
2837 return Var->isFileVarDecl() &&
2838 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2839 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2840 if (const auto *Func = dyn_cast<FunctionDecl>(D))
2841 return Func->doesThisDeclarationHaveABody() || HasBody;
2842
2843 if (auto *ES = D->getASTContext().getExternalSource())
2844 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2845 return true;
2846
2847 return false;
2848}
2849
2850/// Get the correct cursor and offset for loading a declaration.
2851ASTReader::RecordLocation
2852ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2853 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2854 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2854, __PRETTY_FUNCTION__))
;
2855 ModuleFile *M = I->second;
2856 const DeclOffset &DOffs =
2857 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2858 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2859 return RecordLocation(M, DOffs.BitOffset);
2860}
2861
2862ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2863 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2864
2865 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2865, __PRETTY_FUNCTION__))
;
2866 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2867}
2868
2869uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2870 return LocalOffset + M.GlobalBitOffset;
2871}
2872
2873static bool isSameTemplateParameterList(const TemplateParameterList *X,
2874 const TemplateParameterList *Y);
2875
2876/// Determine whether two template parameters are similar enough
2877/// that they may be used in declarations of the same template.
2878static bool isSameTemplateParameter(const NamedDecl *X,
2879 const NamedDecl *Y) {
2880 if (X->getKind() != Y->getKind())
2881 return false;
2882
2883 if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2884 const auto *TY = cast<TemplateTypeParmDecl>(Y);
2885 return TX->isParameterPack() == TY->isParameterPack();
2886 }
2887
2888 if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2889 const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2890 return TX->isParameterPack() == TY->isParameterPack() &&
2891 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2892 }
2893
2894 const auto *TX = cast<TemplateTemplateParmDecl>(X);
2895 const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2896 return TX->isParameterPack() == TY->isParameterPack() &&
2897 isSameTemplateParameterList(TX->getTemplateParameters(),
2898 TY->getTemplateParameters());
2899}
2900
2901static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2902 if (auto *NS = X->getAsNamespace())
2903 return NS;
2904 if (auto *NAS = X->getAsNamespaceAlias())
2905 return NAS->getNamespace();
2906 return nullptr;
2907}
2908
2909static bool isSameQualifier(const NestedNameSpecifier *X,
2910 const NestedNameSpecifier *Y) {
2911 if (auto *NSX = getNamespace(X)) {
2912 auto *NSY = getNamespace(Y);
2913 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2914 return false;
2915 } else if (X->getKind() != Y->getKind())
2916 return false;
2917
2918 // FIXME: For namespaces and types, we're permitted to check that the entity
2919 // is named via the same tokens. We should probably do so.
2920 switch (X->getKind()) {
2921 case NestedNameSpecifier::Identifier:
2922 if (X->getAsIdentifier() != Y->getAsIdentifier())
2923 return false;
2924 break;
2925 case NestedNameSpecifier::Namespace:
2926 case NestedNameSpecifier::NamespaceAlias:
2927 // We've already checked that we named the same namespace.
2928 break;
2929 case NestedNameSpecifier::TypeSpec:
2930 case NestedNameSpecifier::TypeSpecWithTemplate:
2931 if (X->getAsType()->getCanonicalTypeInternal() !=
2932 Y->getAsType()->getCanonicalTypeInternal())
2933 return false;
2934 break;
2935 case NestedNameSpecifier::Global:
2936 case NestedNameSpecifier::Super:
2937 return true;
2938 }
2939
2940 // Recurse into earlier portion of NNS, if any.
2941 auto *PX = X->getPrefix();
2942 auto *PY = Y->getPrefix();
2943 if (PX && PY)
2944 return isSameQualifier(PX, PY);
2945 return !PX && !PY;
2946}
2947
2948/// Determine whether two template parameter lists are similar enough
2949/// that they may be used in declarations of the same template.
2950static bool isSameTemplateParameterList(const TemplateParameterList *X,
2951 const TemplateParameterList *Y) {
2952 if (X->size() != Y->size())
2953 return false;
2954
2955 for (unsigned I = 0, N = X->size(); I != N; ++I)
2956 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2957 return false;
2958
2959 return true;
2960}
2961
2962/// Determine whether the attributes we can overload on are identical for A and
2963/// B. Will ignore any overloadable attrs represented in the type of A and B.
2964static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2965 const FunctionDecl *B) {
2966 // Note that pass_object_size attributes are represented in the function's
2967 // ExtParameterInfo, so we don't need to check them here.
2968
2969 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2970 auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
2971 auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
2972
2973 for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
2974 Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
2975 Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
2976
2977 // Return false if the number of enable_if attributes is different.
2978 if (!Cand1A || !Cand2A)
2979 return false;
2980
2981 Cand1ID.clear();
2982 Cand2ID.clear();
2983
2984 (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2985 (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2986
2987 // Return false if any of the enable_if expressions of A and B are
2988 // different.
2989 if (Cand1ID != Cand2ID)
2990 return false;
2991 }
2992 return true;
2993}
2994
2995/// Determine whether the two declarations refer to the same entity.
2996static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2997 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2997, __PRETTY_FUNCTION__))
;
2998
2999 if (X == Y)
3000 return true;
3001
3002 // Must be in the same context.
3003 //
3004 // Note that we can't use DeclContext::Equals here, because the DeclContexts
3005 // could be two different declarations of the same function. (We will fix the
3006 // semantic DC to refer to the primary definition after merging.)
3007 if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
3008 cast<Decl>(Y->getDeclContext()->getRedeclContext())))
3009 return false;
3010
3011 // Two typedefs refer to the same entity if they have the same underlying
3012 // type.
3013 if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
3014 if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
3015 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
3016 TypedefY->getUnderlyingType());
3017
3018 // Must have the same kind.
3019 if (X->getKind() != Y->getKind())
3020 return false;
3021
3022 // Objective-C classes and protocols with the same name always match.
3023 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
3024 return true;
3025
3026 if (isa<ClassTemplateSpecializationDecl>(X)) {
3027 // No need to handle these here: we merge them when adding them to the
3028 // template.
3029 return false;
3030 }
3031
3032 // Compatible tags match.
3033 if (const auto *TagX = dyn_cast<TagDecl>(X)) {
3034 const auto *TagY = cast<TagDecl>(Y);
3035 return (TagX->getTagKind() == TagY->getTagKind()) ||
3036 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
3037 TagX->getTagKind() == TTK_Interface) &&
3038 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
3039 TagY->getTagKind() == TTK_Interface));
3040 }
3041
3042 // Functions with the same type and linkage match.
3043 // FIXME: This needs to cope with merging of prototyped/non-prototyped
3044 // functions, etc.
3045 if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
3046 const auto *FuncY = cast<FunctionDecl>(Y);
3047 if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
3048 const auto *CtorY = cast<CXXConstructorDecl>(Y);
3049 if (CtorX->getInheritedConstructor() &&
3050 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
3051 CtorY->getInheritedConstructor().getConstructor()))
3052 return false;
3053 }
3054
3055 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3056 return false;
3057
3058 // Multiversioned functions with different feature strings are represented
3059 // as separate declarations.
3060 if (FuncX->isMultiVersion()) {
3061 const auto *TAX = FuncX->getAttr<TargetAttr>();
3062 const auto *TAY = FuncY->getAttr<TargetAttr>();
3063 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3063, __PRETTY_FUNCTION__))
;
3064
3065 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3066 return false;
3067 }
3068
3069 ASTContext &C = FuncX->getASTContext();
3070 auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3071 // Map to the first declaration that we've already merged into this one.
3072 // The TSI of redeclarations might not match (due to calling conventions
3073 // being inherited onto the type but not the TSI), but the TSI type of
3074 // the first declaration of the function should match across modules.
3075 FD = FD->getCanonicalDecl();
3076 return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3077 : FD->getType();
3078 };
3079 QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3080 if (!C.hasSameType(XT, YT)) {
3081 // We can get functions with different types on the redecl chain in C++17
3082 // if they have differing exception specifications and at least one of
3083 // the excpetion specs is unresolved.
3084 auto *XFPT = XT->getAs<FunctionProtoType>();
3085 auto *YFPT = YT->getAs<FunctionProtoType>();
3086 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3087 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3088 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
3089 C.hasSameFunctionTypeIgnoringExceptionSpec(XT, YT))
3090 return true;
3091 return false;
3092 }
3093 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3094 hasSameOverloadableAttrs(FuncX, FuncY);
3095 }
3096
3097 // Variables with the same type and linkage match.
3098 if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3099 const auto *VarY = cast<VarDecl>(Y);
3100 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3101 ASTContext &C = VarX->getASTContext();
3102 if (C.hasSameType(VarX->getType(), VarY->getType()))
3103 return true;
3104
3105 // We can get decls with different types on the redecl chain. Eg.
3106 // template <typename T> struct S { static T Var[]; }; // #1
3107 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3108 // Only? happens when completing an incomplete array type. In this case
3109 // when comparing #1 and #2 we should go through their element type.
3110 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3111 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3112 if (!VarXTy || !VarYTy)
3113 return false;
3114 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3115 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3116 }
3117 return false;
3118 }
3119
3120 // Namespaces with the same name and inlinedness match.
3121 if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3122 const auto *NamespaceY = cast<NamespaceDecl>(Y);
3123 return NamespaceX->isInline() == NamespaceY->isInline();
3124 }
3125
3126 // Identical template names and kinds match if their template parameter lists
3127 // and patterns match.
3128 if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3129 const auto *TemplateY = cast<TemplateDecl>(Y);
3130 return isSameEntity(TemplateX->getTemplatedDecl(),
3131 TemplateY->getTemplatedDecl()) &&
3132 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3133 TemplateY->getTemplateParameters());
3134 }
3135
3136 // Fields with the same name and the same type match.
3137 if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3138 const auto *FDY = cast<FieldDecl>(Y);
3139 // FIXME: Also check the bitwidth is odr-equivalent, if any.
3140 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3141 }
3142
3143 // Indirect fields with the same target field match.
3144 if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3145 const auto *IFDY = cast<IndirectFieldDecl>(Y);
3146 return IFDX->getAnonField()->getCanonicalDecl() ==
3147 IFDY->getAnonField()->getCanonicalDecl();
3148 }
3149
3150 // Enumerators with the same name match.
3151 if (isa<EnumConstantDecl>(X))
3152 // FIXME: Also check the value is odr-equivalent.
3153 return true;
3154
3155 // Using shadow declarations with the same target match.
3156 if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3157 const auto *USY = cast<UsingShadowDecl>(Y);
3158 return USX->getTargetDecl() == USY->getTargetDecl();
3159 }
3160
3161 // Using declarations with the same qualifier match. (We already know that
3162 // the name matches.)
3163 if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3164 const auto *UY = cast<UsingDecl>(Y);
3165 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3166 UX->hasTypename() == UY->hasTypename() &&
3167 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3168 }
3169 if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3170 const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3171 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3172 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3173 }
3174 if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3175 return isSameQualifier(
3176 UX->getQualifier(),
3177 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3178
3179 // Namespace alias definitions with the same target match.
3180 if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3181 const auto *NAY = cast<NamespaceAliasDecl>(Y);
3182 return NAX->getNamespace()->Equals(NAY->getNamespace());
3183 }
3184
3185 return false;
3186}
3187
3188/// Find the context in which we should search for previous declarations when
3189/// looking for declarations to merge.
3190DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3191 DeclContext *DC) {
3192 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3193 return ND->getOriginalNamespace();
3194
3195 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3196 // Try to dig out the definition.
3197 auto *DD = RD->DefinitionData;
3198 if (!DD)
3199 DD = RD->getCanonicalDecl()->DefinitionData;
3200
3201 // If there's no definition yet, then DC's definition is added by an update
3202 // record, but we've not yet loaded that update record. In this case, we
3203 // commit to DC being the canonical definition now, and will fix this when
3204 // we load the update record.
3205 if (!DD) {
3206 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3207 RD->setCompleteDefinition(true);
3208 RD->DefinitionData = DD;
3209 RD->getCanonicalDecl()->DefinitionData = DD;
3210
3211 // Track that we did this horrible thing so that we can fix it later.
3212 Reader.PendingFakeDefinitionData.insert(
3213 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3214 }
3215
3216 return DD->Definition;
3217 }
3218
3219 if (auto *ED = dyn_cast<EnumDecl>(DC))
3220 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3221 : nullptr;
3222
3223 // We can see the TU here only if we have no Sema object. In that case,
3224 // there's no TU scope to look in, so using the DC alone is sufficient.
3225 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3226 return TU;
3227
3228 return nullptr;
3229}
3230
3231ASTDeclReader::FindExistingResult::~FindExistingResult() {
3232 // Record that we had a typedef name for linkage whether or not we merge
3233 // with that declaration.
3234 if (TypedefNameForLinkage) {
3235 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3236 Reader.ImportedTypedefNamesForLinkage.insert(
3237 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3238 return;
3239 }
3240
3241 if (!AddResult || Existing)
3242 return;
3243
3244 DeclarationName Name = New->getDeclName();
3245 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3246 if (needsAnonymousDeclarationNumber(New)) {
3247 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3248 AnonymousDeclNumber, New);
3249 } else if (DC->isTranslationUnit() &&
3250 !Reader.getContext().getLangOpts().CPlusPlus) {
3251 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3252 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3253 .push_back(New);
3254 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3255 // Add the declaration to its redeclaration context so later merging
3256 // lookups will find it.
3257 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3258 }
3259}
3260
3261/// Find the declaration that should be merged into, given the declaration found
3262/// by name lookup. If we're merging an anonymous declaration within a typedef,
3263/// we need a matching typedef, and we merge with the type inside it.
3264static NamedDecl *getDeclForMerging(NamedDecl *Found,
3265 bool IsTypedefNameForLinkage) {
3266 if (!IsTypedefNameForLinkage)
3267 return Found;
3268
3269 // If we found a typedef declaration that gives a name to some other
3270 // declaration, then we want that inner declaration. Declarations from
3271 // AST files are handled via ImportedTypedefNamesForLinkage.
3272 if (Found->isFromASTFile())
3273 return nullptr;
3274
3275 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3276 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3277
3278 return nullptr;
3279}
3280
3281/// Find the declaration to use to populate the anonymous declaration table
3282/// for the given lexical DeclContext. We only care about finding local
3283/// definitions of the context; we'll merge imported ones as we go.
3284DeclContext *
3285ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3286 // For classes, we track the definition as we merge.
3287 if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3288 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3289 return DD ? DD->Definition : nullptr;
3290 }
3291
3292 // For anything else, walk its merged redeclarations looking for a definition.
3293 // Note that we can't just call getDefinition here because the redeclaration
3294 // chain isn't wired up.
3295 for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3296 if (auto *FD = dyn_cast<FunctionDecl>(D))
3297 if (FD->isThisDeclarationADefinition())
3298 return FD;
3299 if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3300 if (MD->isThisDeclarationADefinition())
3301 return MD;
3302 }
3303
3304 // No merged definition yet.
3305 return nullptr;
3306}
3307
3308NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3309 DeclContext *DC,
3310 unsigned Index) {
3311 // If the lexical context has been merged, look into the now-canonical
3312 // definition.
3313 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3314
3315 // If we've seen this before, return the canonical declaration.
3316 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3317 if (Index < Previous.size() && Previous[Index])
3318 return Previous[Index];
3319
3320 // If this is the first time, but we have parsed a declaration of the context,
3321 // build the anonymous declaration list from the parsed declaration.
3322 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3323 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3324 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3325 if (Previous.size() == Number)
3326 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3327 else
3328 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3329 });
3330 }
3331
3332 return Index < Previous.size() ? Previous[Index] : nullptr;
3333}
3334
3335void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3336 DeclContext *DC, unsigned Index,
3337 NamedDecl *D) {
3338 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3339
3340 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3341 if (Index >= Previous.size())
3342 Previous.resize(Index + 1);
3343 if (!Previous[Index])
3344 Previous[Index] = D;
3345}
3346
3347ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3348 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3349 : D->getDeclName();
3350
3351 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3352 // Don't bother trying to find unnamed declarations that are in
3353 // unmergeable contexts.
3354 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3355 AnonymousDeclNumber, TypedefNameForLinkage);
3356 Result.suppress();
3357 return Result;
3358 }
3359
3360 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3361 if (TypedefNameForLinkage) {
3362 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3363 std::make_pair(DC, TypedefNameForLinkage));
3364 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3365 if (isSameEntity(It->second, D))
3366 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3367 TypedefNameForLinkage);
3368 // Go on to check in other places in case an existing typedef name
3369 // was not imported.
3370 }
3371
3372 if (needsAnonymousDeclarationNumber(D)) {
3373 // This is an anonymous declaration that we may need to merge. Look it up
3374 // in its context by number.
3375 if (auto *Existing = getAnonymousDeclForMerging(
3376 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3377 if (isSameEntity(Existing, D))
3378 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3379 TypedefNameForLinkage);
3380 } else if (DC->isTranslationUnit() &&
3381 !Reader.getContext().getLangOpts().CPlusPlus) {
3382 IdentifierResolver &IdResolver = Reader.getIdResolver();
3383
3384 // Temporarily consider the identifier to be up-to-date. We don't want to
3385 // cause additional lookups here.
3386 class UpToDateIdentifierRAII {
3387 IdentifierInfo *II;
3388 bool WasOutToDate = false;
3389
3390 public:
3391 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3392 if (II) {
3393 WasOutToDate = II->isOutOfDate();
3394 if (WasOutToDate)
3395 II->setOutOfDate(false);
3396 }
3397 }
3398
3399 ~UpToDateIdentifierRAII() {
3400 if (WasOutToDate)
3401 II->setOutOfDate(true);
3402 }
3403 } UpToDate(Name.getAsIdentifierInfo());
3404
3405 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3406 IEnd = IdResolver.end();
3407 I != IEnd; ++I) {
3408 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3409 if (isSameEntity(Existing, D))
3410 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3411 TypedefNameForLinkage);
3412 }
3413 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3414 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3415 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3416 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3417 if (isSameEntity(Existing, D))
3418 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3419 TypedefNameForLinkage);
3420 }
3421 } else {
3422 // Not in a mergeable context.
3423 return FindExistingResult(Reader);
3424 }
3425
3426 // If this declaration is from a merged context, make a note that we need to
3427 // check that the canonical definition of that context contains the decl.
3428 //
3429 // FIXME: We should do something similar if we merge two definitions of the
3430 // same template specialization into the same CXXRecordDecl.
3431 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3432 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3433 MergedDCIt->second == D->getDeclContext())
3434 Reader.PendingOdrMergeChecks.push_back(D);
3435
3436 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3437 AnonymousDeclNumber, TypedefNameForLinkage);
3438}
3439
3440template<typename DeclT>
3441Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3442 return D->RedeclLink.getLatestNotUpdated();
3443}
3444
3445Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3446 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3446)
;
3447}
3448
3449Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3450 assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3450, __PRETTY_FUNCTION__))
;
3451
3452 switch (D->getKind()) {
3453#define ABSTRACT_DECL(TYPE)
3454#define DECL(TYPE, BASE) \
3455 case Decl::TYPE: \
3456 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3457#include "clang/AST/DeclNodes.inc"
3458 }
3459 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3459)
;
3460}
3461
3462Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3463 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3464}
3465
3466template<typename DeclT>
3467void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3468 Redeclarable<DeclT> *D,
3469 Decl *Previous, Decl *Canon) {
3470 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3471 D->First = cast<DeclT>(Previous)->First;
3472}
3473
3474namespace clang {
3475
3476template<>
3477void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3478 Redeclarable<VarDecl> *D,
3479 Decl *Previous, Decl *Canon) {
3480 auto *VD = static_cast<VarDecl *>(D);
3481 auto *PrevVD = cast<VarDecl>(Previous);
3482 D->RedeclLink.setPrevious(PrevVD);
3483 D->First = PrevVD->First;
3484
3485 // We should keep at most one definition on the chain.
3486 // FIXME: Cache the definition once we've found it. Building a chain with
3487 // N definitions currently takes O(N^2) time here.
3488 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3489 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3490 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3491 Reader.mergeDefinitionVisibility(CurD, VD);
3492 VD->demoteThisDefinitionToDeclaration();
3493 break;
3494 }
3495 }
3496 }
3497}
3498
3499static bool isUndeducedReturnType(QualType T) {
3500 auto *DT = T->getContainedDeducedType();
3501 return DT && !DT->isDeduced();
3502}
3503
3504template<>
3505void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3506 Redeclarable<FunctionDecl> *D,
3507 Decl *Previous, Decl *Canon) {
3508 auto *FD = static_cast<FunctionDecl *>(D);
3509 auto *PrevFD = cast<FunctionDecl>(Previous);
3510
3511 FD->RedeclLink.setPrevious(PrevFD);
3512 FD->First = PrevFD->First;
3513
3514 // If the previous declaration is an inline function declaration, then this
3515 // declaration is too.
3516 if (PrevFD->isInlined() != FD->isInlined()) {
3517 // FIXME: [dcl.fct.spec]p4:
3518 // If a function with external linkage is declared inline in one
3519 // translation unit, it shall be declared inline in all translation
3520 // units in which it appears.
3521 //
3522 // Be careful of this case:
3523 //
3524 // module A:
3525 // template<typename T> struct X { void f(); };
3526 // template<typename T> inline void X<T>::f() {}
3527 //
3528 // module B instantiates the declaration of X<int>::f
3529 // module C instantiates the definition of X<int>::f
3530 //
3531 // If module B and C are merged, we do not have a violation of this rule.
3532 FD->setImplicitlyInline(true);
3533 }
3534
3535 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3536 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3537 if (FPT && PrevFPT) {
3538 // If we need to propagate an exception specification along the redecl
3539 // chain, make a note of that so that we can do so later.
3540 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3541 bool WasUnresolved =
3542 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3543 if (IsUnresolved != WasUnresolved)
3544 Reader.PendingExceptionSpecUpdates.insert(
3545 {Canon, IsUnresolved ? PrevFD : FD});
3546
3547 // If we need to propagate a deduced return type along the redecl chain,
3548 // make a note of that so that we can do it later.
3549 bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3550 bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3551 if (IsUndeduced != WasUndeduced)
3552 Reader.PendingDeducedTypeUpdates.insert(
3553 {cast<FunctionDecl>(Canon),
3554 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3555 }
3556}
3557
3558} // namespace clang
3559
3560void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3561 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3561)
;
3562}
3563
3564/// Inherit the default template argument from \p From to \p To. Returns
3565/// \c false if there is no default template for \p From.
3566template <typename ParmDecl>
3567static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3568 Decl *ToD) {
3569 auto *To = cast<ParmDecl>(ToD);
3570 if (!From->hasDefaultArgument())
3571 return false;
3572 To->setInheritedDefaultArgument(Context, From);
3573 return true;
3574}
3575
3576static void inheritDefaultTemplateArguments(ASTContext &Context,
3577 TemplateDecl *From,
3578 TemplateDecl *To) {
3579 auto *FromTP = From->getTemplateParameters();
3580 auto *ToTP = To->getTemplateParameters();
3581 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3581, __PRETTY_FUNCTION__))
;
3582
3583 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3584 NamedDecl *FromParam = FromTP->getParam(I);
3585 NamedDecl *ToParam = ToTP->getParam(I);
3586
3587 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3588 inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3589 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3590 inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3591 else
3592 inheritDefaultTemplateArgument(
3593 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3594 }
3595}
3596
3597void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3598 Decl *Previous, Decl *Canon) {
3599 assert(D && Previous)((D && Previous) ? static_cast<void> (0) : __assert_fail
("D && Previous", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3599, __PRETTY_FUNCTION__))
;
3600
3601 switch (D->getKind()) {
3602#define ABSTRACT_DECL(TYPE)
3603#define DECL(TYPE, BASE) \
3604 case Decl::TYPE: \
3605 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3606 break;
3607#include "clang/AST/DeclNodes.inc"
3608 }
3609
3610 // If the declaration was visible in one module, a redeclaration of it in
3611 // another module remains visible even if it wouldn't be visible by itself.
3612 //
3613 // FIXME: In this case, the declaration should only be visible if a module
3614 // that makes it visible has been imported.
3615 D->IdentifierNamespace |=
3616 Previous->IdentifierNamespace &
3617 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3618
3619 // If the declaration declares a template, it may inherit default arguments
3620 // from the previous declaration.
3621 if (auto *TD = dyn_cast<TemplateDecl>(D))
3622 inheritDefaultTemplateArguments(Reader.getContext(),
3623 cast<TemplateDecl>(Previous), TD);
3624}
3625
3626template<typename DeclT>
3627void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3628 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3629}
3630
3631void ASTDeclReader::attachLatestDeclImpl(...) {
3632 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3632)
;
3633}
3634
3635void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3636 assert(D && Latest)((D && Latest) ? static_cast<void> (0) : __assert_fail
("D && Latest", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3636, __PRETTY_FUNCTION__))
;
3637
3638 switch (D->getKind()) {
3639#define ABSTRACT_DECL(TYPE)
3640#define DECL(TYPE, BASE) \
3641 case Decl::TYPE: \
3642 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3643 break;
3644#include "clang/AST/DeclNodes.inc"
3645 }
3646}
3647
3648template<typename DeclT>
3649void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3650 D->RedeclLink.markIncomplete();
3651}
3652
3653void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3654 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3654)
;
3655}
3656
3657void ASTReader::markIncompleteDeclChain(Decl *D) {
3658 switch (D->getKind()) {
3659#define ABSTRACT_DECL(TYPE)
3660#define DECL(TYPE, BASE) \
3661 case Decl::TYPE: \
3662 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3663 break;
3664#include "clang/AST/DeclNodes.inc"
3665 }
3666}
3667
3668/// Read the declaration at the given offset from the AST file.
3669Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3670 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3671 SourceLocation DeclLoc;
3672 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3673 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3674 // Keep track of where we are in the stream, then jump back there
3675 // after reading this declaration.
3676 SavedStreamPosition SavedPosition(DeclsCursor);
3677
3678 ReadingKindTracker ReadingKind(Read_Decl, *this);
3679
3680 // Note that we are loading a declaration record.
3681 Deserializing ADecl(this);
3682
3683 auto Fail = [](const char *what, llvm::Error &&Err) {
3684 llvm::report_fatal_error(Twine("ASTReader::readDeclRecord failed ") + what +
3685 ": " + toString(std::move(Err)));
3686 };
3687
3688 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(Loc.Offset))
3689 Fail("jumping", std::move(JumpFailed));
3690 ASTRecordReader Record(*this, *Loc.F);
3691 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3692 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3693 if (!MaybeCode)
3694 Fail("reading code", MaybeCode.takeError());
3695 unsigned Code = MaybeCode.get();
3696
3697 ASTContext &Context = getContext();
3698 Decl *D = nullptr;
3699 Expected<unsigned> MaybeDeclCode = Record.readRecord(DeclsCursor, Code);
3700 if (!MaybeDeclCode)
3701 llvm::report_fatal_error(
3702 "ASTReader::readDeclRecord failed reading decl code: " +
3703 toString(MaybeDeclCode.takeError()));
3704 switch ((DeclCode)MaybeDeclCode.get()) {
3705 case DECL_CONTEXT_LEXICAL:
3706 case DECL_CONTEXT_VISIBLE:
3707 llvm_unreachable("Record cannot be de-serialized with readDeclRecord")::llvm::llvm_unreachable_internal("Record cannot be de-serialized with readDeclRecord"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3707)
;
3708 case DECL_TYPEDEF:
3709 D = TypedefDecl::CreateDeserialized(Context, ID);
3710 break;
3711 case DECL_TYPEALIAS:
3712 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3713 break;
3714 case DECL_ENUM:
3715 D = EnumDecl::CreateDeserialized(Context, ID);
3716 break;
3717 case DECL_RECORD:
3718 D = RecordDecl::CreateDeserialized(Context, ID);
3719 break;
3720 case DECL_ENUM_CONSTANT:
3721 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3722 break;
3723 case DECL_FUNCTION:
3724 D = FunctionDecl::CreateDeserialized(Context, ID);
3725 break;
3726 case DECL_LINKAGE_SPEC:
3727 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3728 break;
3729 case DECL_EXPORT:
3730 D = ExportDecl::CreateDeserialized(Context, ID);
3731 break;
3732 case DECL_LABEL:
3733 D = LabelDecl::CreateDeserialized(Context, ID);
3734 break;
3735 case DECL_NAMESPACE:
3736 D = NamespaceDecl::CreateDeserialized(Context, ID);
3737 break;
3738 case DECL_NAMESPACE_ALIAS:
3739 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3740 break;
3741 case DECL_USING:
3742 D = UsingDecl::CreateDeserialized(Context, ID);
3743 break;
3744 case DECL_USING_PACK:
3745 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3746 break;
3747 case DECL_USING_SHADOW:
3748 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3749 break;
3750 case DECL_CONSTRUCTOR_USING_SHADOW:
3751 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3752 break;
3753 case DECL_USING_DIRECTIVE:
3754 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3755 break;
3756 case DECL_UNRESOLVED_USING_VALUE:
3757 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3758 break;
3759 case DECL_UNRESOLVED_USING_TYPENAME:
3760 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3761 break;
3762 case DECL_CXX_RECORD:
3763 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3764 break;
3765 case DECL_CXX_DEDUCTION_GUIDE:
3766 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3767 break;
3768 case DECL_CXX_METHOD:
3769 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3770 break;
3771 case DECL_CXX_CONSTRUCTOR:
3772 D = CXXConstructorDecl::CreateDeserialized(Context, ID, Record.readInt());
3773 break;
3774 case DECL_CXX_DESTRUCTOR:
3775 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3776 break;
3777 case DECL_CXX_CONVERSION:
3778 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3779 break;
3780 case DECL_ACCESS_SPEC:
3781 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3782 break;
3783 case DECL_FRIEND:
3784 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3785 break;
3786 case DECL_FRIEND_TEMPLATE:
3787 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3788 break;
3789 case DECL_CLASS_TEMPLATE:
3790 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3791 break;
3792 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3793 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3794 break;
3795 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3796 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3797 break;
3798 case DECL_VAR_TEMPLATE:
3799 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3800 break;
3801 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3802 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3803 break;
3804 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3805 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3806 break;
3807 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3808 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3809 break;
3810 case DECL_FUNCTION_TEMPLATE:
3811 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3812 break;
3813 case DECL_TEMPLATE_TYPE_PARM: {
3814 bool HasTypeConstraint = Record.readInt();
3815 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID,
3816 HasTypeConstraint);
3817 break;
3818 }
3819 case DECL_NON_TYPE_TEMPLATE_PARM: {
3820 bool HasTypeConstraint = Record.readInt();
3821 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3822 HasTypeConstraint);
3823 break;
3824 }
3825 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK: {
3826 bool HasTypeConstraint = Record.readInt();
3827 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3828 Record.readInt(),
3829 HasTypeConstraint);
3830 break;
3831 }
3832 case DECL_TEMPLATE_TEMPLATE_PARM:
3833 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3834 break;
3835 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3836 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3837 Record.readInt());
3838 break;
3839 case DECL_TYPE_ALIAS_TEMPLATE:
3840 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3841 break;
3842 case DECL_CONCEPT:
3843 D = ConceptDecl::CreateDeserialized(Context, ID);
3844 break;
3845 case DECL_REQUIRES_EXPR_BODY:
3846 D = RequiresExprBodyDecl::CreateDeserialized(Context, ID);
3847 break;
3848 case DECL_STATIC_ASSERT:
3849 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3850 break;
3851 case DECL_OBJC_METHOD:
3852 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3853 break;
3854 case DECL_OBJC_INTERFACE:
3855 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3856 break;
3857 case DECL_OBJC_IVAR:
3858 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3859 break;
3860 case DECL_OBJC_PROTOCOL:
3861 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3862 break;
3863 case DECL_OBJC_AT_DEFS_FIELD:
3864 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3865 break;
3866 case DECL_OBJC_CATEGORY:
3867 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3868 break;
3869 case DECL_OBJC_CATEGORY_IMPL:
3870 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3871 break;
3872 case DECL_OBJC_IMPLEMENTATION:
3873 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3874 break;
3875 case DECL_OBJC_COMPATIBLE_ALIAS:
3876 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3877 break;
3878 case DECL_OBJC_PROPERTY:
3879 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3880 break;
3881 case DECL_OBJC_PROPERTY_IMPL:
3882 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3883 break;
3884 case DECL_FIELD:
3885 D = FieldDecl::CreateDeserialized(Context, ID);
3886 break;
3887 case DECL_INDIRECTFIELD:
3888 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3889 break;
3890 case DECL_VAR:
3891 D = VarDecl::CreateDeserialized(Context, ID);
3892 break;
3893 case DECL_IMPLICIT_PARAM:
3894 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3895 break;
3896 case DECL_PARM_VAR:
3897 D = ParmVarDecl::CreateDeserialized(Context, ID);
3898 break;
3899 case DECL_DECOMPOSITION:
3900 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3901 break;
3902 case DECL_BINDING:
3903 D = BindingDecl::CreateDeserialized(Context, ID);
3904 break;
3905 case DECL_FILE_SCOPE_ASM:
3906 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3907 break;
3908 case DECL_BLOCK:
3909 D = BlockDecl::CreateDeserialized(Context, ID);
3910 break;
3911 case DECL_MS_PROPERTY:
3912 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3913 break;
3914 case DECL_CAPTURED:
3915 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3916 break;
3917 case DECL_CXX_BASE_SPECIFIERS:
3918 Error("attempt to read a C++ base-specifier record as a declaration");
3919 return nullptr;
3920 case DECL_CXX_CTOR_INITIALIZERS:
3921 Error("attempt to read a C++ ctor initializer record as a declaration");
3922 return nullptr;
3923 case DECL_IMPORT:
3924 // Note: last entry of the ImportDecl record is the number of stored source
3925 // locations.
3926 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3927 break;
3928 case DECL_OMP_THREADPRIVATE:
3929 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3930 break;
3931 case DECL_OMP_ALLOCATE: {
3932 unsigned NumVars = Record.readInt();
3933 unsigned NumClauses = Record.readInt();
3934 D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
3935 break;
3936 }
3937 case DECL_OMP_REQUIRES:
3938 D = OMPRequiresDecl::CreateDeserialized(Context, ID, Record.readInt());
3939 break;
3940 case DECL_OMP_DECLARE_REDUCTION:
3941 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3942 break;
3943 case DECL_OMP_DECLARE_MAPPER:
3944 D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, Record.readInt());
3945 break;
3946 case DECL_OMP_CAPTUREDEXPR:
3947 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3948 break;
3949 case DECL_PRAGMA_COMMENT:
3950 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3951 break;
3952 case DECL_PRAGMA_DETECT_MISMATCH:
3953 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3954 Record.readInt());
3955 break;
3956 case DECL_EMPTY:
3957 D = EmptyDecl::CreateDeserialized(Context, ID);
3958 break;
3959 case DECL_LIFETIME_EXTENDED_TEMPORARY:
3960 D = LifetimeExtendedTemporaryDecl::CreateDeserialized(Context, ID);
3961 break;
3962 case DECL_OBJC_TYPE_PARAM:
3963 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3964 break;
3965 }
3966
3967 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3967, __PRETTY_FUNCTION__))
;
3968 LoadedDecl(Index, D);
3969 // Set the DeclContext before doing any deserialization, to make sure internal
3970 // calls to Decl::getASTContext() by Decl's methods will find the
3971 // TranslationUnitDecl without crashing.
3972 D->setDeclContext(Context.getTranslationUnitDecl());
3973 Reader.Visit(D);
3974
3975 // If this declaration is also a declaration context, get the
3976 // offsets for its tables of lexical and visible declarations.
3977 if (auto *DC = dyn_cast<DeclContext>(D)) {
3978 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3979 if (Offsets.first &&
3980 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3981 return nullptr;
3982 if (Offsets.second &&
3983 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3984 return nullptr;
3985 }
3986 assert(Record.getIdx() == Record.size())((Record.getIdx() == Record.size()) ? static_cast<void>
(0) : __assert_fail ("Record.getIdx() == Record.size()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3986, __PRETTY_FUNCTION__))
;
3987
3988 // Load any relevant update records.
3989 PendingUpdateRecords.push_back(
3990 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3991
3992 // Load the categories after recursive loading is finished.
3993 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3994 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3995 // we put the Decl in PendingDefinitions so we can pull the categories here.
3996 if (Class->isThisDeclarationADefinition() ||
3997 PendingDefinitions.count(Class))
3998 loadObjCCategories(ID, Class);
3999
4000 // If we have deserialized a declaration that has a definition the
4001 // AST consumer might need to know about, queue it.
4002 // We don't pass it to the consumer immediately because we may be in recursive
4003 // loading, and some declarations may still be initializing.
4004 PotentiallyInterestingDecls.push_back(
4005 InterestingDecl(D, Reader.hasPendingBody()));
4006
4007 return D;
4008}
4009
4010void ASTReader::PassInterestingDeclsToConsumer() {
4011 assert(Consumer)((Consumer) ? static_cast<void> (0) : __assert_fail ("Consumer"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4011, __PRETTY_FUNCTION__))
;
4012
4013 if (PassingDeclsToConsumer)
4014 return;
4015
4016 // Guard variable to avoid recursively redoing the process of passing
4017 // decls to consumer.
4018 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
4019 true);
4020
4021 // Ensure that we've loaded all potentially-interesting declarations
4022 // that need to be eagerly loaded.
4023 for (auto ID : EagerlyDeserializedDecls)
4024 GetDecl(ID);
4025 EagerlyDeserializedDecls.clear();
4026
4027 while (!PotentiallyInterestingDecls.empty()) {
4028 InterestingDecl D = PotentiallyInterestingDecls.front();
4029 PotentiallyInterestingDecls.pop_front();
4030 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
4031 PassInterestingDeclToConsumer(D.getDecl());
4032 }
4033}
4034
4035void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4036 // The declaration may have been modified by files later in the chain.
4037 // If this is the case, read the record containing the updates from each file
4038 // and pass it to ASTDeclReader to make the modifications.
4039 serialization::GlobalDeclID ID = Record.ID;
4040 Decl *D = Record.D;
4041 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4042 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
4043
4044 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
4045
4046 if (UpdI != DeclUpdateOffsets.end()) {
4047 auto UpdateOffsets = std::move(UpdI->second);
4048 DeclUpdateOffsets.erase(UpdI);
4049
4050 // Check if this decl was interesting to the consumer. If we just loaded
4051 // the declaration, then we know it was interesting and we skip the call
4052 // to isConsumerInterestedIn because it is unsafe to call in the
4053 // current ASTReader state.
4054 bool WasInteresting =
4055 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
4056 for (auto &FileAndOffset : UpdateOffsets) {
4057 ModuleFile *F = FileAndOffset.first;
4058 uint64_t Offset = FileAndOffset.second;
4059 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4060 SavedStreamPosition SavedPosition(Cursor);
4061 if (llvm::Error JumpFailed = Cursor.JumpToBit(Offset))
4062 // FIXME don't do a fatal error.
4063 llvm::report_fatal_error(
4064 "ASTReader::loadDeclUpdateRecords failed jumping: " +
4065 toString(std::move(JumpFailed)));
4066 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4067 if (!MaybeCode)
4068 llvm::report_fatal_error(
4069 "ASTReader::loadDeclUpdateRecords failed reading code: " +
4070 toString(MaybeCode.takeError()));
4071 unsigned Code = MaybeCode.get();
4072 ASTRecordReader Record(*this, *F);
4073 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, Code))
4074 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4075, __PRETTY_FUNCTION__))
4075 "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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4075, __PRETTY_FUNCTION__))
;
4076 else
4077 llvm::report_fatal_error(
4078 "ASTReader::loadDeclUpdateRecords failed reading rec code: " +
4079 toString(MaybeCode.takeError()));
4080
4081 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4082 SourceLocation());
4083 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4084
4085 // We might have made this declaration interesting. If so, remember that
4086 // we need to hand it off to the consumer.
4087 if (!WasInteresting &&
4088 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4089 PotentiallyInterestingDecls.push_back(
4090 InterestingDecl(D, Reader.hasPendingBody()));
4091 WasInteresting = true;
4092 }
4093 }
4094 }
4095 // Add the lazy specializations to the template.
4096 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4098, __PRETTY_FUNCTION__))
4097 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4098, __PRETTY_FUNCTION__))
4098 "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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4098, __PRETTY_FUNCTION__))
;
4099 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4100 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4101 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4102 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4103 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4104 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4105 PendingLazySpecializationIDs.clear();
4106
4107 // Load the pending visible updates for this decl context, if it has any.
4108 auto I = PendingVisibleUpdates.find(ID);
4109 if (I != PendingVisibleUpdates.end()) {
4110 auto VisibleUpdates = std::move(I->second);
4111 PendingVisibleUpdates.erase(I);
4112
4113 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4114 for (const auto &Update : VisibleUpdates)
4115 Lookups[DC].Table.add(
4116 Update.Mod, Update.Data,
4117 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4118 DC->setHasExternalVisibleStorage(true);
4119 }
4120}
4121
4122void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4123 // Attach FirstLocal to the end of the decl chain.
4124 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4125 if (FirstLocal != CanonDecl) {
4126 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4127 ASTDeclReader::attachPreviousDecl(
4128 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4129 CanonDecl);
4130 }
4131
4132 if (!LocalOffset) {
4133 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4134 return;
4135 }
4136
4137 // Load the list of other redeclarations from this module file.
4138 ModuleFile *M = getOwningModuleFile(FirstLocal);
4139 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4139, __PRETTY_FUNCTION__))
;
4140
4141 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4142 SavedStreamPosition SavedPosition(Cursor);
4143 if (llvm::Error JumpFailed = Cursor.JumpToBit(LocalOffset))
4144 llvm::report_fatal_error(
4145 "ASTReader::loadPendingDeclChain failed jumping: " +
4146 toString(std::move(JumpFailed)));
4147
4148 RecordData Record;
4149 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4150 if (!MaybeCode)
4151 llvm::report_fatal_error(
4152 "ASTReader::loadPendingDeclChain failed reading code: " +
4153 toString(MaybeCode.takeError()));
4154 unsigned Code = MaybeCode.get();
4155 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record))
4156 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4157, __PRETTY_FUNCTION__))
4157 "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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4157, __PRETTY_FUNCTION__))
;
4158 else
4159 llvm::report_fatal_error(
4160 "ASTReader::loadPendingDeclChain failed reading rec code: " +
4161 toString(MaybeCode.takeError()));
4162
4163 // FIXME: We have several different dispatches on decl kind here; maybe
4164 // we should instead generate one loop per kind and dispatch up-front?
4165 Decl *MostRecent = FirstLocal;
4166 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4167 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4168 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4169 MostRecent = D;
4170 }
4171 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4172}
4173
4174namespace {
4175
4176 /// Given an ObjC interface, goes through the modules and links to the
4177 /// interface all the categories for it.
4178 class ObjCCategoriesVisitor {
4179 ASTReader &Reader;
4180 ObjCInterfaceDecl *Interface;
4181 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4182 ObjCCategoryDecl *Tail = nullptr;
4183 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4184 serialization::GlobalDeclID InterfaceID;
4185 unsigned PreviousGeneration;
4186
4187 void add(ObjCCategoryDecl *Cat) {
4188 // Only process each category once.
4189 if (!Deserialized.erase(Cat))
13
Assuming the condition is false
14
Taking false branch
4190 return;
4191
4192 // Check for duplicate categories.
4193 if (Cat->getDeclName()) {
15
Called C++ object pointer is null
4194 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4195 if (Existing &&
4196 Reader.getOwningModuleFile(Existing)
4197 != Reader.getOwningModuleFile(Cat)) {
4198 // FIXME: We should not warn for duplicates in diamond:
4199 //
4200 // MT //
4201 // / \ //
4202 // ML MR //
4203 // \ / //
4204 // MB //
4205 //
4206 // If there are duplicates in ML/MR, there will be warning when
4207 // creating MB *and* when importing MB. We should not warn when
4208 // importing.
4209 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4210 << Interface->getDeclName() << Cat->getDeclName();
4211 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4212 } else if (!Existing) {
4213 // Record this category.
4214 Existing = Cat;
4215 }
4216 }
4217
4218 // Add this category to the end of the chain.
4219 if (Tail)
4220 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4221 else
4222 Interface->setCategoryListRaw(Cat);
4223 Tail = Cat;
4224 }
4225
4226 public:
4227 ObjCCategoriesVisitor(ASTReader &Reader,
4228 ObjCInterfaceDecl *Interface,
4229 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4230 serialization::GlobalDeclID InterfaceID,
4231 unsigned PreviousGeneration)
4232 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4233 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4234 // Populate the name -> category map with the set of known categories.
4235 for (auto *Cat : Interface->known_categories()) {
4236 if (Cat->getDeclName())
4237 NameCategoryMap[Cat->getDeclName()] = Cat;
4238
4239 // Keep track of the tail of the category list.
4240 Tail = Cat;
4241 }
4242 }
4243
4244 bool operator()(ModuleFile &M) {
4245 // If we've loaded all of the category information we care about from
4246 // this module file, we're done.
4247 if (M.Generation <= PreviousGeneration)
1
Assuming field 'Generation' is > field 'PreviousGeneration'
2
Taking false branch
4248 return true;
4249
4250 // Map global ID of the definition down to the local ID used in this
4251 // module file. If there is no such mapping, we'll find nothing here
4252 // (or in any module it imports).
4253 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4254 if (!LocalID)
3
Assuming 'LocalID' is not equal to 0
4
Taking false branch
4255 return true;
4256
4257 // Perform a binary search to find the local redeclarations for this
4258 // declaration (if any).
4259 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4260 const ObjCCategoriesInfo *Result
4261 = std::lower_bound(M.ObjCCategoriesMap,
4262 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4263 Compare);
4264 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
5
Assuming the condition is false
7
Taking false branch
4265 Result->DefinitionID != LocalID) {
6
Assuming 'LocalID' is equal to field 'DefinitionID'
4266 // We didn't find anything. If the class definition is in this module
4267 // file, then the module files it depends on cannot have any categories,
4268 // so suppress further lookup.
4269 return Reader.isDeclIDFromModule(InterfaceID, M);
4270 }
4271
4272 // We found something. Dig out all of the categories.
4273 unsigned Offset = Result->Offset;
4274 unsigned N = M.ObjCCategories[Offset];
4275 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4276 for (unsigned I = 0; I != N; ++I)
8
Assuming 'I' is not equal to 'N'
9
Loop condition is true. Entering loop body
4277 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'
4278 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4279 return true;
4280 }
4281 };
4282
4283} // namespace
4284
4285void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4286 ObjCInterfaceDecl *D,
4287 unsigned PreviousGeneration) {
4288 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4289 PreviousGeneration);
4290 ModuleMgr.visit(Visitor);
4291}
4292
4293template<typename DeclT, typename Fn>
4294static void forAllLaterRedecls(DeclT *D, Fn F) {
4295 F(D);
4296
4297 // Check whether we've already merged D into its redeclaration chain.
4298 // MostRecent may or may not be nullptr if D has not been merged. If
4299 // not, walk the merged redecl chain and see if it's there.
4300 auto *MostRecent = D->getMostRecentDecl();
4301 bool Found = false;
4302 for (auto *Redecl = MostRecent; Redecl && !Found;
4303 Redecl = Redecl->getPreviousDecl())
4304 Found = (Redecl == D);
4305
4306 // If this declaration is merged, apply the functor to all later decls.
4307 if (Found) {
4308 for (auto *Redecl = MostRecent; Redecl != D;
4309 Redecl = Redecl->getPreviousDecl())
4310 F(Redecl);
4311 }
4312}
4313
4314void ASTDeclReader::UpdateDecl(Decl *D,
4315 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4316 while (Record.getIdx() < Record.size()) {
4317 switch ((DeclUpdateKind)Record.readInt()) {
4318 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4319 auto *RD = cast<CXXRecordDecl>(D);
4320 // FIXME: If we also have an update record for instantiating the
4321 // definition of D, we need that to happen before we get here.
4322 Decl *MD = Record.readDecl();
4323 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4323, __PRETTY_FUNCTION__))
;
4324 // FIXME: We should call addHiddenDecl instead, to add the member
4325 // to its DeclContext.
4326 RD->addedMember(MD);
4327 break;
4328 }
4329
4330 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4331 // It will be added to the template's lazy specialization set.
4332 PendingLazySpecializationIDs.push_back(readDeclID());
4333 break;
4334
4335 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4336 auto *Anon = readDeclAs<NamespaceDecl>();
4337
4338 // Each module has its own anonymous namespace, which is disjoint from
4339 // any other module's anonymous namespaces, so don't attach the anonymous
4340 // namespace at all.
4341 if (!Record.isModule()) {
4342 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4343 TU->setAnonymousNamespace(Anon);
4344 else
4345 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4346 }
4347 break;
4348 }
4349
4350 case UPD_CXX_ADDED_VAR_DEFINITION: {
4351 auto *VD = cast<VarDecl>(D);
4352 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4353 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4354 uint64_t Val = Record.readInt();
4355 if (Val && !VD->getInit()) {
4356 VD->setInit(Record.readExpr());
4357 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4358 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4359 Eval->CheckedICE = true;
4360 Eval->IsICE = Val == 3;
4361 }
4362 }
4363 break;
4364 }
4365
4366 case UPD_CXX_POINT_OF_INSTANTIATION: {
4367 SourceLocation POI = Record.readSourceLocation();
4368 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4369 VTSD->setPointOfInstantiation(POI);
4370 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4371 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4372 } else {
4373 auto *FD = cast<FunctionDecl>(D);
4374 if (auto *FTSInfo = FD->TemplateOrSpecialization
4375 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4376 FTSInfo->setPointOfInstantiation(POI);
4377 else
4378 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4379 ->setPointOfInstantiation(POI);
4380 }
4381 break;
4382 }
4383
4384 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4385 auto *Param = cast<ParmVarDecl>(D);
4386
4387 // We have to read the default argument regardless of whether we use it
4388 // so that hypothetical further update records aren't messed up.
4389 // TODO: Add a function to skip over the next expr record.
4390 auto *DefaultArg = Record.readExpr();
4391
4392 // Only apply the update if the parameter still has an uninstantiated
4393 // default argument.
4394 if (Param->hasUninstantiatedDefaultArg())
4395 Param->setDefaultArg(DefaultArg);
4396 break;
4397 }
4398
4399 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4400 auto *FD = cast<FieldDecl>(D);
4401 auto *DefaultInit = Record.readExpr();
4402
4403 // Only apply the update if the field still has an uninstantiated
4404 // default member initializer.
4405 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4406 if (DefaultInit)
4407 FD->setInClassInitializer(DefaultInit);
4408 else
4409 // Instantiation failed. We can get here if we serialized an AST for
4410 // an invalid program.
4411 FD->removeInClassInitializer();
4412 }
4413 break;
4414 }
4415
4416 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4417 auto *FD = cast<FunctionDecl>(D);
4418 if (Reader.PendingBodies[FD]) {
4419 // FIXME: Maybe check for ODR violations.
4420 // It's safe to stop now because this update record is always last.
4421 return;
4422 }
4423
4424 if (Record.readInt()) {
4425 // Maintain AST consistency: any later redeclarations of this function
4426 // are inline if this one is. (We might have merged another declaration
4427 // into this one.)
4428 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4429 FD->setImplicitlyInline();
4430 });
4431 }
4432 FD->setInnerLocStart(readSourceLocation());
4433 ReadFunctionDefinition(FD);
4434 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-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4434, __PRETTY_FUNCTION__))
;
4435 break;
4436 }
4437
4438 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4439 auto *RD = cast<CXXRecordDecl>(D);
4440 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4441 bool HadRealDefinition =
4442 OldDD && (OldDD->Definition != RD ||
4443 !Reader.PendingFakeDefinitionData.count(OldDD));
4444 RD->setParamDestroyedInCallee(Record.readInt());
4445 RD->setArgPassingRestrictions(
4446 (RecordDecl::ArgPassingKind)Record.readInt());
4447 ReadCXXRecordDefinition(RD, /*Update*/true);
4448
4449 // Visible update is handled separately.
4450 uint64_t LexicalOffset = ReadLocalOffset();
4451 if (!HadRealDefinition && LexicalOffset) {
4452 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4453 Reader.PendingFakeDefinitionData.erase(OldDD);
4454 }
4455
4456 auto TSK = (TemplateSpecializationKind)Record.readInt();
4457 SourceLocation POI = readSourceLocation();
4458 if (MemberSpecializationInfo *MSInfo =
4459 RD->getMemberSpecializationInfo()) {
4460 MSInfo->setTemplateSpecializationKind(TSK);
4461 MSInfo->setPointOfInstantiation(POI);
4462 } else {
4463 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4464 Spec->setTemplateSpecializationKind(TSK);
4465 Spec->setPointOfInstantiation(POI);
4466
4467 if (Record.readInt()) {
4468 auto *PartialSpec =
4469 readDeclAs<ClassTemplatePartialSpecializationDecl>();
4470 SmallVector<TemplateArgument, 8> TemplArgs;
4471 Record.readTemplateArgumentList(TemplArgs);
4472 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4473 Reader.getContext(), TemplArgs);
4474
4475 // FIXME: If we already have a partial specialization set,
4476 // check that it matches.
4477 if (!Spec->getSpecializedTemplateOrPartial()
4478 .is<ClassTemplatePartialSpecializationDecl *>())
4479 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4480 }
4481 }
4482
4483 RD->setTagKind((TagTypeKind)Record.readInt());
4484 RD->setLocation(readSourceLocation());
4485 RD->setLocStart(readSourceLocation());
4486 RD->setBraceRange(readSourceRange());
4487
4488 if (Record.readInt()) {
4489 AttrVec Attrs;
4490 Record.readAttributes(Attrs);
4491 // If the declaration already has attributes, we assume that some other
4492 // AST file already loaded them.
4493 if (!D->hasAttrs())
4494 D->setAttrsImpl(Attrs, Reader.getContext());
4495 }
4496 break;
4497 }
4498
4499 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4500 // Set the 'operator delete' directly to avoid emitting another update
4501 // record.
4502 auto *Del = readDeclAs<FunctionDecl>();
4503 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4504 auto *ThisArg = Record.readExpr();
4505 // FIXME: Check consistency if we have an old and new operator delete.
4506 if (!First->OperatorDelete) {
4507 First->OperatorDelete = Del;
4508 First->OperatorDeleteThisArg = ThisArg;
4509 }
4510 break;
4511 }
4512
4513 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4514 SmallVector<QualType, 8> ExceptionStorage;
4515 auto ESI = Record.readExceptionSpecInfo(ExceptionStorage);
4516
4517 // Update this declaration's exception specification, if needed.
4518 auto *FD = cast<FunctionDecl>(D);
4519 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4520 // FIXME: If the exception specification is already present, check that it
4521 // matches.
4522 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4523 FD->setType(Reader.getContext().getFunctionType(
4524 FPT->getReturnType(), FPT->getParamTypes(),
4525 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4526
4527 // When we get to the end of deserializing, see if there are other decls
4528 // that we need to propagate this exception specification onto.
4529 Reader.PendingExceptionSpecUpdates.insert(
4530 std::make_pair(FD->getCanonicalDecl(), FD));
4531 }
4532 break;
4533 }
4534
4535 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4536 auto *FD = cast<FunctionDecl>(D);
4537 QualType DeducedResultType = Record.readType();
4538 Reader.PendingDeducedTypeUpdates.insert(
4539 {FD->getCanonicalDecl(), DeducedResultType});
4540 break;
4541 }
4542
4543 case UPD_DECL_MARKED_USED:
4544 // Maintain AST consistency: any later redeclarations are used too.
4545 D->markUsed(Reader.getContext());
4546 break;
4547
4548 case UPD_MANGLING_NUMBER:
4549 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4550 Record.readInt());
4551 break;
4552
4553 case UPD_STATIC_LOCAL_NUMBER:
4554 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4555 Record.readInt());
4556 break;
4557
4558 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4559 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
4560 Reader.getContext(), readSourceRange(),
4561 AttributeCommonInfo::AS_Pragma));
4562 break;
4563
4564 case UPD_DECL_MARKED_OPENMP_ALLOCATE: {
4565 auto AllocatorKind =
4566 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4567 Expr *Allocator = Record.readExpr();
4568 SourceRange SR = readSourceRange();
4569 D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4570 Reader.getContext(), AllocatorKind, Allocator, SR,
4571 AttributeCommonInfo::AS_Pragma));
4572 break;
4573 }
4574
4575 case UPD_DECL_EXPORTED: {
4576 unsigned SubmoduleID = readSubmoduleID();
4577 auto *Exported = cast<NamedDecl>(D);
4578 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4579 Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4580 Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4581 break;
4582 }
4583
4584 case UPD_DECL_MARKED_OPENMP_DECLARETARGET: {
4585 OMPDeclareTargetDeclAttr::MapTypeTy MapType =
4586 static_cast<OMPDeclareTargetDeclAttr::MapTypeTy>(Record.readInt());
4587 OMPDeclareTargetDeclAttr::DevTypeTy DevType =
4588 static_cast<OMPDeclareTargetDeclAttr::DevTypeTy>(Record.readInt());
4589 D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4590 Reader.getContext(), MapType, DevType, readSourceRange(),
4591 AttributeCommonInfo::AS_Pragma));
4592 break;
4593 }
4594
4595 case UPD_ADDED_ATTR_TO_RECORD:
4596 AttrVec Attrs;
4597 Record.readAttributes(Attrs);
4598 assert(Attrs.size() == 1)((Attrs.size() == 1) ? static_cast<void> (0) : __assert_fail
("Attrs.size() == 1", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4598, __PRETTY_FUNCTION__))
;
4599 D->addAttr(Attrs[0]);
4600 break;
4601 }
4602 }
4603}