Bug Summary

File:clang/lib/Serialization/ASTReaderDecl.cpp
Warning:line 2483, column 16
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ASTReaderDecl.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-12/lib/clang/12.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/include -I /build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-12/lib/clang/12.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/build-llvm/tools/clang/lib/Serialization -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-10-27-053609-25509-1 -x c++ /build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp
1//===- ASTReaderDecl.cpp - Decl Deserialization ---------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the ASTReader::readDeclRecord method, which is the
10// entrypoint for loading a decl.
11//
12//===----------------------------------------------------------------------===//
13
14#include "ASTCommon.h"
15#include "ASTReaderInternals.h"
16#include "clang/AST/ASTContext.h"
17#include "clang/AST/Attr.h"
18#include "clang/AST/AttrIterator.h"
19#include "clang/AST/Decl.h"
20#include "clang/AST/DeclBase.h"
21#include "clang/AST/DeclCXX.h"
22#include "clang/AST/DeclFriend.h"
23#include "clang/AST/DeclObjC.h"
24#include "clang/AST/DeclOpenMP.h"
25#include "clang/AST/DeclTemplate.h"
26#include "clang/AST/DeclVisitor.h"
27#include "clang/AST/DeclarationName.h"
28#include "clang/AST/Expr.h"
29#include "clang/AST/ExternalASTSource.h"
30#include "clang/AST/LambdaCapture.h"
31#include "clang/AST/NestedNameSpecifier.h"
32#include "clang/AST/OpenMPClause.h"
33#include "clang/AST/Redeclarable.h"
34#include "clang/AST/Stmt.h"
35#include "clang/AST/TemplateBase.h"
36#include "clang/AST/Type.h"
37#include "clang/AST/UnresolvedSet.h"
38#include "clang/Basic/AttrKinds.h"
39#include "clang/Basic/ExceptionSpecificationType.h"
40#include "clang/Basic/IdentifierTable.h"
41#include "clang/Basic/LLVM.h"
42#include "clang/Basic/Lambda.h"
43#include "clang/Basic/LangOptions.h"
44#include "clang/Basic/Linkage.h"
45#include "clang/Basic/Module.h"
46#include "clang/Basic/PragmaKinds.h"
47#include "clang/Basic/SourceLocation.h"
48#include "clang/Basic/Specifiers.h"
49#include "clang/Sema/IdentifierResolver.h"
50#include "clang/Serialization/ASTBitCodes.h"
51#include "clang/Serialization/ASTRecordReader.h"
52#include "clang/Serialization/ContinuousRangeMap.h"
53#include "clang/Serialization/ModuleFile.h"
54#include "llvm/ADT/DenseMap.h"
55#include "llvm/ADT/FoldingSet.h"
56#include "llvm/ADT/STLExtras.h"
57#include "llvm/ADT/SmallPtrSet.h"
58#include "llvm/ADT/SmallVector.h"
59#include "llvm/ADT/iterator_range.h"
60#include "llvm/Bitstream/BitstreamReader.h"
61#include "llvm/Support/Casting.h"
62#include "llvm/Support/ErrorHandling.h"
63#include "llvm/Support/SaveAndRestore.h"
64#include <algorithm>
65#include <cassert>
66#include <cstdint>
67#include <cstring>
68#include <string>
69#include <utility>
70
71using namespace clang;
72using namespace serialization;
73
74//===----------------------------------------------------------------------===//
75// Declaration deserialization
76//===----------------------------------------------------------------------===//
77
78namespace clang {
79
80 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
81 ASTReader &Reader;
82 ASTRecordReader &Record;
83 ASTReader::RecordLocation Loc;
84 const DeclID ThisDeclID;
85 const SourceLocation ThisDeclLoc;
86
87 using RecordData = ASTReader::RecordData;
88
89 TypeID DeferredTypeID = 0;
90 unsigned AnonymousDeclNumber;
91 GlobalDeclID NamedDeclForTagDecl = 0;
92 IdentifierInfo *TypedefNameForLinkage = nullptr;
93
94 bool HasPendingBody = false;
95
96 ///A flag to carry the information for a decl from the entity is
97 /// used. We use it to delay the marking of the canonical decl as used until
98 /// the entire declaration is deserialized and merged.
99 bool IsDeclMarkedUsed = false;
100
101 uint64_t GetCurrentCursorOffset();
102
103 uint64_t ReadLocalOffset() {
104 uint64_t LocalOffset = Record.readInt();
105 assert(LocalOffset < Loc.Offset && "offset point after current record")((LocalOffset < Loc.Offset && "offset point after current record"
) ? static_cast<void> (0) : __assert_fail ("LocalOffset < Loc.Offset && \"offset point after current record\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 105, __PRETTY_FUNCTION__))
;
106 return LocalOffset ? Loc.Offset - LocalOffset : 0;
107 }
108
109 uint64_t ReadGlobalOffset() {
110 uint64_t Local = ReadLocalOffset();
111 return Local ? Record.getGlobalBitOffset(Local) : 0;
112 }
113
114 SourceLocation readSourceLocation() {
115 return Record.readSourceLocation();
116 }
117
118 SourceRange readSourceRange() {
119 return Record.readSourceRange();
120 }
121
122 TypeSourceInfo *readTypeSourceInfo() {
123 return Record.readTypeSourceInfo();
124 }
125
126 serialization::DeclID readDeclID() {
127 return Record.readDeclID();
128 }
129
130 std::string readString() {
131 return Record.readString();
132 }
133
134 void readDeclIDList(SmallVectorImpl<DeclID> &IDs) {
135 for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
136 IDs.push_back(readDeclID());
137 }
138
139 Decl *readDecl() {
140 return Record.readDecl();
141 }
142
143 template<typename T>
144 T *readDeclAs() {
145 return Record.readDeclAs<T>();
146 }
147
148 serialization::SubmoduleID readSubmoduleID() {
149 if (Record.getIdx() == Record.size())
150 return 0;
151
152 return Record.getGlobalSubmoduleID(Record.readInt());
153 }
154
155 Module *readModule() {
156 return Record.getSubmodule(readSubmoduleID());
157 }
158
159 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
160 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
161 const CXXRecordDecl *D);
162 void MergeDefinitionData(CXXRecordDecl *D,
163 struct CXXRecordDecl::DefinitionData &&NewDD);
164 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
165 void MergeDefinitionData(ObjCInterfaceDecl *D,
166 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
167 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
168 void MergeDefinitionData(ObjCProtocolDecl *D,
169 struct ObjCProtocolDecl::DefinitionData &&NewDD);
170
171 static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
172
173 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
174 DeclContext *DC,
175 unsigned Index);
176 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
177 unsigned Index, NamedDecl *D);
178
179 /// Results from loading a RedeclarableDecl.
180 class RedeclarableResult {
181 Decl *MergeWith;
182 GlobalDeclID FirstID;
183 bool IsKeyDecl;
184
185 public:
186 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
187 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
188
189 /// Retrieve the first ID.
190 GlobalDeclID getFirstID() const { return FirstID; }
191
192 /// Is this declaration a key declaration?
193 bool isKeyDecl() const { return IsKeyDecl; }
194
195 /// Get a known declaration that this should be merged with, if
196 /// any.
197 Decl *getKnownMergeTarget() const { return MergeWith; }
198 };
199
200 /// Class used to capture the result of searching for an existing
201 /// declaration of a specific kind and name, along with the ability
202 /// to update the place where this result was found (the declaration
203 /// chain hanging off an identifier or the DeclContext we searched in)
204 /// if requested.
205 class FindExistingResult {
206 ASTReader &Reader;
207 NamedDecl *New = nullptr;
208 NamedDecl *Existing = nullptr;
209 bool AddResult = false;
210 unsigned AnonymousDeclNumber = 0;
211 IdentifierInfo *TypedefNameForLinkage = nullptr;
212
213 public:
214 FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
215
216 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
217 unsigned AnonymousDeclNumber,
218 IdentifierInfo *TypedefNameForLinkage)
219 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
220 AnonymousDeclNumber(AnonymousDeclNumber),
221 TypedefNameForLinkage(TypedefNameForLinkage) {}
222
223 FindExistingResult(FindExistingResult &&Other)
224 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
225 AddResult(Other.AddResult),
226 AnonymousDeclNumber(Other.AnonymousDeclNumber),
227 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
228 Other.AddResult = false;
229 }
230
231 FindExistingResult &operator=(FindExistingResult &&) = delete;
232 ~FindExistingResult();
233
234 /// Suppress the addition of this result into the known set of
235 /// names.
236 void suppress() { AddResult = false; }
237
238 operator NamedDecl*() const { return Existing; }
239
240 template<typename T>
241 operator T*() const { return dyn_cast_or_null<T>(Existing); }
242 };
243
244 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
245 DeclContext *DC);
246 FindExistingResult findExisting(NamedDecl *D);
247
248 public:
249 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
250 ASTReader::RecordLocation Loc,
251 DeclID thisDeclID, SourceLocation ThisDeclLoc)
252 : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
253 ThisDeclLoc(ThisDeclLoc) {}
254
255 template <typename T> static
256 void AddLazySpecializations(T *D,
257 SmallVectorImpl<serialization::DeclID>& IDs) {
258 if (IDs.empty())
259 return;
260
261 // FIXME: We should avoid this pattern of getting the ASTContext.
262 ASTContext &C = D->getASTContext();
263
264 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
265
266 if (auto &Old = LazySpecializations) {
267 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
268 llvm::sort(IDs);
269 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
270 }
271
272 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
273 *Result = IDs.size();
274 std::copy(IDs.begin(), IDs.end(), Result + 1);
275
276 LazySpecializations = Result;
277 }
278
279 template <typename DeclT>
280 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
281 static Decl *getMostRecentDeclImpl(...);
282 static Decl *getMostRecentDecl(Decl *D);
283
284 static void mergeInheritableAttributes(ASTReader &Reader, Decl *D,
285 Decl *Previous);
286
287 template <typename DeclT>
288 static void attachPreviousDeclImpl(ASTReader &Reader,
289 Redeclarable<DeclT> *D, Decl *Previous,
290 Decl *Canon);
291 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
292 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
293 Decl *Canon);
294
295 template <typename DeclT>
296 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
297 static void attachLatestDeclImpl(...);
298 static void attachLatestDecl(Decl *D, Decl *latest);
299
300 template <typename DeclT>
301 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
302 static void markIncompleteDeclChainImpl(...);
303
304 /// Determine whether this declaration has a pending body.
305 bool hasPendingBody() const { return HasPendingBody; }
306
307 void ReadFunctionDefinition(FunctionDecl *FD);
308 void Visit(Decl *D);
309
310 void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
311
312 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
313 ObjCCategoryDecl *Next) {
314 Cat->NextClassCategory = Next;
315 }
316
317 void VisitDecl(Decl *D);
318 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
319 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
320 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
321 void VisitNamedDecl(NamedDecl *ND);
322 void VisitLabelDecl(LabelDecl *LD);
323 void VisitNamespaceDecl(NamespaceDecl *D);
324 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
325 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
326 void VisitTypeDecl(TypeDecl *TD);
327 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
328 void VisitTypedefDecl(TypedefDecl *TD);
329 void VisitTypeAliasDecl(TypeAliasDecl *TD);
330 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
331 RedeclarableResult VisitTagDecl(TagDecl *TD);
332 void VisitEnumDecl(EnumDecl *ED);
333 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
334 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
335 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
336 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
337 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
338 ClassTemplateSpecializationDecl *D);
339
340 void VisitClassTemplateSpecializationDecl(
341 ClassTemplateSpecializationDecl *D) {
342 VisitClassTemplateSpecializationDeclImpl(D);
343 }
344
345 void VisitClassTemplatePartialSpecializationDecl(
346 ClassTemplatePartialSpecializationDecl *D);
347 void VisitClassScopeFunctionSpecializationDecl(
348 ClassScopeFunctionSpecializationDecl *D);
349 RedeclarableResult
350 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
351
352 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
353 VisitVarTemplateSpecializationDeclImpl(D);
354 }
355
356 void VisitVarTemplatePartialSpecializationDecl(
357 VarTemplatePartialSpecializationDecl *D);
358 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
359 void VisitValueDecl(ValueDecl *VD);
360 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
361 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
362 void VisitDeclaratorDecl(DeclaratorDecl *DD);
363 void VisitFunctionDecl(FunctionDecl *FD);
364 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
365 void VisitCXXMethodDecl(CXXMethodDecl *D);
366 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
367 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
368 void VisitCXXConversionDecl(CXXConversionDecl *D);
369 void VisitFieldDecl(FieldDecl *FD);
370 void VisitMSPropertyDecl(MSPropertyDecl *FD);
371 void VisitMSGuidDecl(MSGuidDecl *D);
372 void VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D);
373 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
374 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
375 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
376 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
377 void VisitParmVarDecl(ParmVarDecl *PD);
378 void VisitDecompositionDecl(DecompositionDecl *DD);
379 void VisitBindingDecl(BindingDecl *BD);
380 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
381 DeclID VisitTemplateDecl(TemplateDecl *D);
382 void VisitConceptDecl(ConceptDecl *D);
383 void VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D);
384 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
385 void VisitClassTemplateDecl(ClassTemplateDecl *D);
386 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
387 void VisitVarTemplateDecl(VarTemplateDecl *D);
388 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
389 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
390 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
391 void VisitUsingDecl(UsingDecl *D);
392 void VisitUsingPackDecl(UsingPackDecl *D);
393 void VisitUsingShadowDecl(UsingShadowDecl *D);
394 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
395 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
396 void VisitExportDecl(ExportDecl *D);
397 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
398 void VisitImportDecl(ImportDecl *D);
399 void VisitAccessSpecDecl(AccessSpecDecl *D);
400 void VisitFriendDecl(FriendDecl *D);
401 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
402 void VisitStaticAssertDecl(StaticAssertDecl *D);
403 void VisitBlockDecl(BlockDecl *BD);
404 void VisitCapturedDecl(CapturedDecl *CD);
405 void VisitEmptyDecl(EmptyDecl *D);
406 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
407
408 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
409
410 template<typename T>
411 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
412
413 template<typename T>
414 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
415 DeclID TemplatePatternID = 0);
416
417 template<typename T>
418 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
419 RedeclarableResult &Redecl,
420 DeclID TemplatePatternID = 0);
421
422 template<typename T>
423 void mergeMergeable(Mergeable<T> *D);
424
425 void mergeMergeable(LifetimeExtendedTemporaryDecl *D);
426
427 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
428 RedeclarableTemplateDecl *Existing,
429 DeclID DsID, bool IsKeyDecl);
430
431 ObjCTypeParamList *ReadObjCTypeParamList();
432
433 // FIXME: Reorder according to DeclNodes.td?
434 void VisitObjCMethodDecl(ObjCMethodDecl *D);
435 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
436 void VisitObjCContainerDecl(ObjCContainerDecl *D);
437 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
438 void VisitObjCIvarDecl(ObjCIvarDecl *D);
439 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
440 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
441 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
442 void VisitObjCImplDecl(ObjCImplDecl *D);
443 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
444 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
445 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
446 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
447 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
448 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
449 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
450 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
451 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
452 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
453 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
454 };
455
456} // namespace clang
457
458namespace {
459
460/// Iterator over the redeclarations of a declaration that have already
461/// been merged into the same redeclaration chain.
462template<typename DeclT>
463class MergedRedeclIterator {
464 DeclT *Start;
465 DeclT *Canonical = nullptr;
466 DeclT *Current = nullptr;
467
468public:
469 MergedRedeclIterator() = default;
470 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
471
472 DeclT *operator*() { return Current; }
473
474 MergedRedeclIterator &operator++() {
475 if (Current->isFirstDecl()) {
476 Canonical = Current;
477 Current = Current->getMostRecentDecl();
478 } else
479 Current = Current->getPreviousDecl();
480
481 // If we started in the merged portion, we'll reach our start position
482 // eventually. Otherwise, we'll never reach it, but the second declaration
483 // we reached was the canonical declaration, so stop when we see that one
484 // again.
485 if (Current == Start || Current == Canonical)
486 Current = nullptr;
487 return *this;
488 }
489
490 friend bool operator!=(const MergedRedeclIterator &A,
491 const MergedRedeclIterator &B) {
492 return A.Current != B.Current;
493 }
494};
495
496} // namespace
497
498template <typename DeclT>
499static llvm::iterator_range<MergedRedeclIterator<DeclT>>
500merged_redecls(DeclT *D) {
501 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
502 MergedRedeclIterator<DeclT>());
503}
504
505uint64_t ASTDeclReader::GetCurrentCursorOffset() {
506 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
507}
508
509void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
510 if (Record.readInt()) {
511 Reader.DefinitionSource[FD] =
512 Loc.F->Kind == ModuleKind::MK_MainFile ||
513 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
514 }
515 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
516 CD->setNumCtorInitializers(Record.readInt());
517 if (CD->getNumCtorInitializers())
518 CD->CtorInitializers = ReadGlobalOffset();
519 }
520 // Store the offset of the body so we can lazily load it later.
521 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
522 HasPendingBody = true;
523}
524
525void ASTDeclReader::Visit(Decl *D) {
526 DeclVisitor<ASTDeclReader, void>::Visit(D);
527
528 // At this point we have deserialized and merged the decl and it is safe to
529 // update its canonical decl to signal that the entire entity is used.
530 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
531 IsDeclMarkedUsed = false;
532
533 if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
534 if (auto *TInfo = DD->getTypeSourceInfo())
535 Record.readTypeLoc(TInfo->getTypeLoc());
536 }
537
538 if (auto *TD = dyn_cast<TypeDecl>(D)) {
539 // We have a fully initialized TypeDecl. Read its type now.
540 TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
541
542 // If this is a tag declaration with a typedef name for linkage, it's safe
543 // to load that typedef now.
544 if (NamedDeclForTagDecl)
545 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
546 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
547 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
548 // if we have a fully initialized TypeDecl, we can safely read its type now.
549 ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
550 } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
551 // FunctionDecl's body was written last after all other Stmts/Exprs.
552 // We only read it if FD doesn't already have a body (e.g., from another
553 // module).
554 // FIXME: Can we diagnose ODR violations somehow?
555 if (Record.readInt())
556 ReadFunctionDefinition(FD);
557 }
558}
559
560void ASTDeclReader::VisitDecl(Decl *D) {
561 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
562 isa<ParmVarDecl>(D) || isa<ObjCTypeParamDecl>(D)) {
563 // We don't want to deserialize the DeclContext of a template
564 // parameter or of a parameter of a function template immediately. These
565 // entities might be used in the formulation of its DeclContext (for
566 // example, a function parameter can be used in decltype() in trailing
567 // return type of the function). Use the translation unit DeclContext as a
568 // placeholder.
569 GlobalDeclID SemaDCIDForTemplateParmDecl = readDeclID();
570 GlobalDeclID LexicalDCIDForTemplateParmDecl = readDeclID();
571 if (!LexicalDCIDForTemplateParmDecl)
572 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
573 Reader.addPendingDeclContextInfo(D,
574 SemaDCIDForTemplateParmDecl,
575 LexicalDCIDForTemplateParmDecl);
576 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
577 } else {
578 auto *SemaDC = readDeclAs<DeclContext>();
579 auto *LexicalDC = readDeclAs<DeclContext>();
580 if (!LexicalDC)
581 LexicalDC = SemaDC;
582 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
583 // Avoid calling setLexicalDeclContext() directly because it uses
584 // Decl::getASTContext() internally which is unsafe during derialization.
585 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
586 Reader.getContext());
587 }
588 D->setLocation(ThisDeclLoc);
589 D->InvalidDecl = Record.readInt();
590 if (Record.readInt()) { // hasAttrs
591 AttrVec Attrs;
592 Record.readAttributes(Attrs);
593 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
594 // internally which is unsafe during derialization.
595 D->setAttrsImpl(Attrs, Reader.getContext());
596 }
597 D->setImplicit(Record.readInt());
598 D->Used = Record.readInt();
599 IsDeclMarkedUsed |= D->Used;
600 D->setReferenced(Record.readInt());
601 D->setTopLevelDeclInObjCContainer(Record.readInt());
602 D->setAccess((AccessSpecifier)Record.readInt());
603 D->FromASTFile = true;
604 bool ModulePrivate = Record.readInt();
605
606 // Determine whether this declaration is part of a (sub)module. If so, it
607 // may not yet be visible.
608 if (unsigned SubmoduleID = readSubmoduleID()) {
609 // Store the owning submodule ID in the declaration.
610 D->setModuleOwnershipKind(
611 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
612 : Decl::ModuleOwnershipKind::VisibleWhenImported);
613 D->setOwningModuleID(SubmoduleID);
614
615 if (ModulePrivate) {
616 // Module-private declarations are never visible, so there is no work to
617 // do.
618 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
619 // If local visibility is being tracked, this declaration will become
620 // hidden and visible as the owning module does.
621 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
622 // Mark the declaration as visible when its owning module becomes visible.
623 if (Owner->NameVisibility == Module::AllVisible)
624 D->setVisibleDespiteOwningModule();
625 else
626 Reader.HiddenNamesMap[Owner].push_back(D);
627 }
628 } else if (ModulePrivate) {
629 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
630 }
631}
632
633void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
634 VisitDecl(D);
635 D->setLocation(readSourceLocation());
636 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
637 std::string Arg = readString();
638 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
639 D->getTrailingObjects<char>()[Arg.size()] = '\0';
640}
641
642void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
643 VisitDecl(D);
644 D->setLocation(readSourceLocation());
645 std::string Name = readString();
646 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
647 D->getTrailingObjects<char>()[Name.size()] = '\0';
648
649 D->ValueStart = Name.size() + 1;
650 std::string Value = readString();
651 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
652 Value.size());
653 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
654}
655
656void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
657 llvm_unreachable("Translation units are not serialized")::llvm::llvm_unreachable_internal("Translation units are not serialized"
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 657)
;
658}
659
660void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
661 VisitDecl(ND);
662 ND->setDeclName(Record.readDeclarationName());
663 AnonymousDeclNumber = Record.readInt();
664}
665
666void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
667 VisitNamedDecl(TD);
668 TD->setLocStart(readSourceLocation());
669 // Delay type reading until after we have fully initialized the decl.
670 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
671}
672
673ASTDeclReader::RedeclarableResult
674ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
675 RedeclarableResult Redecl = VisitRedeclarable(TD);
676 VisitTypeDecl(TD);
677 TypeSourceInfo *TInfo = readTypeSourceInfo();
678 if (Record.readInt()) { // isModed
679 QualType modedT = Record.readType();
680 TD->setModedTypeSourceInfo(TInfo, modedT);
681 } else
682 TD->setTypeSourceInfo(TInfo);
683 // Read and discard the declaration for which this is a typedef name for
684 // linkage, if it exists. We cannot rely on our type to pull in this decl,
685 // because it might have been merged with a type from another module and
686 // thus might not refer to our version of the declaration.
687 readDecl();
688 return Redecl;
689}
690
691void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
692 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
693 mergeRedeclarable(TD, Redecl);
694}
695
696void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
697 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
698 if (auto *Template = readDeclAs<TypeAliasTemplateDecl>())
699 // Merged when we merge the template.
700 TD->setDescribedAliasTemplate(Template);
701 else
702 mergeRedeclarable(TD, Redecl);
703}
704
705ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
706 RedeclarableResult Redecl = VisitRedeclarable(TD);
707 VisitTypeDecl(TD);
708
709 TD->IdentifierNamespace = Record.readInt();
710 TD->setTagKind((TagDecl::TagKind)Record.readInt());
711 if (!isa<CXXRecordDecl>(TD))
712 TD->setCompleteDefinition(Record.readInt());
713 TD->setEmbeddedInDeclarator(Record.readInt());
714 TD->setFreeStanding(Record.readInt());
715 TD->setCompleteDefinitionRequired(Record.readInt());
716 TD->setBraceRange(readSourceRange());
717
718 switch (Record.readInt()) {
719 case 0:
720 break;
721 case 1: { // ExtInfo
722 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
723 Record.readQualifierInfo(*Info);
724 TD->TypedefNameDeclOrQualifier = Info;
725 break;
726 }
727 case 2: // TypedefNameForAnonDecl
728 NamedDeclForTagDecl = readDeclID();
729 TypedefNameForLinkage = Record.readIdentifier();
730 break;
731 default:
732 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 732)
;
733 }
734
735 if (!isa<CXXRecordDecl>(TD))
736 mergeRedeclarable(TD, Redecl);
737 return Redecl;
738}
739
740void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
741 VisitTagDecl(ED);
742 if (TypeSourceInfo *TI = readTypeSourceInfo())
743 ED->setIntegerTypeSourceInfo(TI);
744 else
745 ED->setIntegerType(Record.readType());
746 ED->setPromotionType(Record.readType());
747 ED->setNumPositiveBits(Record.readInt());
748 ED->setNumNegativeBits(Record.readInt());
749 ED->setScoped(Record.readInt());
750 ED->setScopedUsingClassTag(Record.readInt());
751 ED->setFixed(Record.readInt());
752
753 ED->setHasODRHash(true);
754 ED->ODRHash = Record.readInt();
755
756 // If this is a definition subject to the ODR, and we already have a
757 // definition, merge this one into it.
758 if (ED->isCompleteDefinition() &&
759 Reader.getContext().getLangOpts().Modules &&
760 Reader.getContext().getLangOpts().CPlusPlus) {
761 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
762 if (!OldDef) {
763 // This is the first time we've seen an imported definition. Look for a
764 // local definition before deciding that we are the first definition.
765 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
766 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
767 OldDef = D;
768 break;
769 }
770 }
771 }
772 if (OldDef) {
773 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
774 ED->setCompleteDefinition(false);
775 Reader.mergeDefinitionVisibility(OldDef, ED);
776 if (OldDef->getODRHash() != ED->getODRHash())
777 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
778 } else {
779 OldDef = ED;
780 }
781 }
782
783 if (auto *InstED = readDeclAs<EnumDecl>()) {
784 auto TSK = (TemplateSpecializationKind)Record.readInt();
785 SourceLocation POI = readSourceLocation();
786 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
787 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
788 }
789}
790
791ASTDeclReader::RedeclarableResult
792ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
793 RedeclarableResult Redecl = VisitTagDecl(RD);
794 RD->setHasFlexibleArrayMember(Record.readInt());
795 RD->setAnonymousStructOrUnion(Record.readInt());
796 RD->setHasObjectMember(Record.readInt());
797 RD->setHasVolatileMember(Record.readInt());
798 RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
799 RD->setNonTrivialToPrimitiveCopy(Record.readInt());
800 RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
801 RD->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(Record.readInt());
802 RD->setHasNonTrivialToPrimitiveDestructCUnion(Record.readInt());
803 RD->setHasNonTrivialToPrimitiveCopyCUnion(Record.readInt());
804 RD->setParamDestroyedInCallee(Record.readInt());
805 RD->setArgPassingRestrictions((RecordDecl::ArgPassingKind)Record.readInt());
806 return Redecl;
807}
808
809void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
810 VisitNamedDecl(VD);
811 // For function declarations, defer reading the type in case the function has
812 // a deduced return type that references an entity declared within the
813 // function.
814 if (isa<FunctionDecl>(VD))
815 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
816 else
817 VD->setType(Record.readType());
818}
819
820void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
821 VisitValueDecl(ECD);
822 if (Record.readInt())
823 ECD->setInitExpr(Record.readExpr());
824 ECD->setInitVal(Record.readAPSInt());
825 mergeMergeable(ECD);
826}
827
828void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
829 VisitValueDecl(DD);
830 DD->setInnerLocStart(readSourceLocation());
831 if (Record.readInt()) { // hasExtInfo
832 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
833 Record.readQualifierInfo(*Info);
834 Info->TrailingRequiresClause = Record.readExpr();
835 DD->DeclInfo = Info;
836 }
837 QualType TSIType = Record.readType();
838 DD->setTypeSourceInfo(
839 TSIType.isNull() ? nullptr
840 : Reader.getContext().CreateTypeSourceInfo(TSIType));
841}
842
843void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
844 RedeclarableResult Redecl = VisitRedeclarable(FD);
845 VisitDeclaratorDecl(FD);
846
847 // Attach a type to this function. Use the real type if possible, but fall
848 // back to the type as written if it involves a deduced return type.
849 if (FD->getTypeSourceInfo() &&
850 FD->getTypeSourceInfo()->getType()->castAs<FunctionType>()
851 ->getReturnType()->getContainedAutoType()) {
852 // We'll set up the real type in Visit, once we've finished loading the
853 // function.
854 FD->setType(FD->getTypeSourceInfo()->getType());
855 Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
856 } else {
857 FD->setType(Reader.GetType(DeferredTypeID));
858 }
859 DeferredTypeID = 0;
860
861 FD->DNLoc = Record.readDeclarationNameLoc(FD->getDeclName());
862 FD->IdentifierNamespace = Record.readInt();
863
864 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
865 // after everything else is read.
866
867 FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
868 FD->setInlineSpecified(Record.readInt());
869 FD->setImplicitlyInline(Record.readInt());
870 FD->setVirtualAsWritten(Record.readInt());
871 FD->setPure(Record.readInt());
872 FD->setHasInheritedPrototype(Record.readInt());
873 FD->setHasWrittenPrototype(Record.readInt());
874 FD->setDeletedAsWritten(Record.readInt());
875 FD->setTrivial(Record.readInt());
876 FD->setTrivialForCall(Record.readInt());
877 FD->setDefaulted(Record.readInt());
878 FD->setExplicitlyDefaulted(Record.readInt());
879 FD->setHasImplicitReturnZero(Record.readInt());
880 FD->setConstexprKind(static_cast<ConstexprSpecKind>(Record.readInt()));
881 FD->setUsesSEHTry(Record.readInt());
882 FD->setHasSkippedBody(Record.readInt());
883 FD->setIsMultiVersion(Record.readInt());
884 FD->setLateTemplateParsed(Record.readInt());
885
886 FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
887 FD->EndRangeLoc = readSourceLocation();
888
889 FD->ODRHash = Record.readInt();
890 FD->setHasODRHash(true);
891
892 if (FD->isDefaulted()) {
893 if (unsigned NumLookups = Record.readInt()) {
894 SmallVector<DeclAccessPair, 8> Lookups;
895 for (unsigned I = 0; I != NumLookups; ++I) {
896 NamedDecl *ND = Record.readDeclAs<NamedDecl>();
897 AccessSpecifier AS = (AccessSpecifier)Record.readInt();
898 Lookups.push_back(DeclAccessPair::make(ND, AS));
899 }
900 FD->setDefaultedFunctionInfo(FunctionDecl::DefaultedFunctionInfo::Create(
901 Reader.getContext(), Lookups));
902 }
903 }
904
905 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
906 case FunctionDecl::TK_NonTemplate:
907 mergeRedeclarable(FD, Redecl);
908 break;
909 case FunctionDecl::TK_FunctionTemplate:
910 // Merged when we merge the template.
911 FD->setDescribedFunctionTemplate(readDeclAs<FunctionTemplateDecl>());
912 break;
913 case FunctionDecl::TK_MemberSpecialization: {
914 auto *InstFD = readDeclAs<FunctionDecl>();
915 auto TSK = (TemplateSpecializationKind)Record.readInt();
916 SourceLocation POI = readSourceLocation();
917 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
918 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
919 mergeRedeclarable(FD, Redecl);
920 break;
921 }
922 case FunctionDecl::TK_FunctionTemplateSpecialization: {
923 auto *Template = readDeclAs<FunctionTemplateDecl>();
924 auto TSK = (TemplateSpecializationKind)Record.readInt();
925
926 // Template arguments.
927 SmallVector<TemplateArgument, 8> TemplArgs;
928 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
929
930 // Template args as written.
931 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
932 SourceLocation LAngleLoc, RAngleLoc;
933 bool HasTemplateArgumentsAsWritten = Record.readInt();
934 if (HasTemplateArgumentsAsWritten) {
935 unsigned NumTemplateArgLocs = Record.readInt();
936 TemplArgLocs.reserve(NumTemplateArgLocs);
937 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
938 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
939
940 LAngleLoc = readSourceLocation();
941 RAngleLoc = readSourceLocation();
942 }
943
944 SourceLocation POI = readSourceLocation();
945
946 ASTContext &C = Reader.getContext();
947 TemplateArgumentList *TemplArgList
948 = TemplateArgumentList::CreateCopy(C, TemplArgs);
949 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
950 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
951 TemplArgsInfo.addArgument(TemplArgLocs[i]);
952
953 MemberSpecializationInfo *MSInfo = nullptr;
954 if (Record.readInt()) {
955 auto *FD = readDeclAs<FunctionDecl>();
956 auto TSK = (TemplateSpecializationKind)Record.readInt();
957 SourceLocation POI = readSourceLocation();
958
959 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
960 MSInfo->setPointOfInstantiation(POI);
961 }
962
963 FunctionTemplateSpecializationInfo *FTInfo =
964 FunctionTemplateSpecializationInfo::Create(
965 C, FD, Template, TSK, TemplArgList,
966 HasTemplateArgumentsAsWritten ? &TemplArgsInfo : nullptr, POI,
967 MSInfo);
968 FD->TemplateOrSpecialization = FTInfo;
969
970 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
971 // The template that contains the specializations set. It's not safe to
972 // use getCanonicalDecl on Template since it may still be initializing.
973 auto *CanonTemplate = readDeclAs<FunctionTemplateDecl>();
974 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
975 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
976 // FunctionTemplateSpecializationInfo's Profile().
977 // We avoid getASTContext because a decl in the parent hierarchy may
978 // be initializing.
979 llvm::FoldingSetNodeID ID;
980 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
981 void *InsertPos = nullptr;
982 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
983 FunctionTemplateSpecializationInfo *ExistingInfo =
984 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
985 if (InsertPos)
986 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
987 else {
988 assert(Reader.getContext().getLangOpts().Modules &&((Reader.getContext().getLangOpts().Modules && "already deserialized this template specialization"
) ? static_cast<void> (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 989, __PRETTY_FUNCTION__))
989 "already deserialized this template specialization")((Reader.getContext().getLangOpts().Modules && "already deserialized this template specialization"
) ? static_cast<void> (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 989, __PRETTY_FUNCTION__))
;
990 mergeRedeclarable(FD, ExistingInfo->getFunction(), Redecl);
991 }
992 }
993 break;
994 }
995 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
996 // Templates.
997 UnresolvedSet<8> TemplDecls;
998 unsigned NumTemplates = Record.readInt();
999 while (NumTemplates--)
1000 TemplDecls.addDecl(readDeclAs<NamedDecl>());
1001
1002 // Templates args.
1003 TemplateArgumentListInfo TemplArgs;
1004 unsigned NumArgs = Record.readInt();
1005 while (NumArgs--)
1006 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
1007 TemplArgs.setLAngleLoc(readSourceLocation());
1008 TemplArgs.setRAngleLoc(readSourceLocation());
1009
1010 FD->setDependentTemplateSpecialization(Reader.getContext(),
1011 TemplDecls, TemplArgs);
1012 // These are not merged; we don't need to merge redeclarations of dependent
1013 // template friends.
1014 break;
1015 }
1016 }
1017
1018 // Read in the parameters.
1019 unsigned NumParams = Record.readInt();
1020 SmallVector<ParmVarDecl *, 16> Params;
1021 Params.reserve(NumParams);
1022 for (unsigned I = 0; I != NumParams; ++I)
1023 Params.push_back(readDeclAs<ParmVarDecl>());
1024 FD->setParams(Reader.getContext(), Params);
1025}
1026
1027void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
1028 VisitNamedDecl(MD);
1029 if (Record.readInt()) {
1030 // Load the body on-demand. Most clients won't care, because method
1031 // definitions rarely show up in headers.
1032 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1033 HasPendingBody = true;
1034 }
1035 MD->setSelfDecl(readDeclAs<ImplicitParamDecl>());
1036 MD->setCmdDecl(readDeclAs<ImplicitParamDecl>());
1037 MD->setInstanceMethod(Record.readInt());
1038 MD->setVariadic(Record.readInt());
1039 MD->setPropertyAccessor(Record.readInt());
1040 MD->setSynthesizedAccessorStub(Record.readInt());
1041 MD->setDefined(Record.readInt());
1042 MD->setOverriding(Record.readInt());
1043 MD->setHasSkippedBody(Record.readInt());
1044
1045 MD->setIsRedeclaration(Record.readInt());
1046 MD->setHasRedeclaration(Record.readInt());
1047 if (MD->hasRedeclaration())
1048 Reader.getContext().setObjCMethodRedeclaration(MD,
1049 readDeclAs<ObjCMethodDecl>());
1050
1051 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1052 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1053 MD->setRelatedResultType(Record.readInt());
1054 MD->setReturnType(Record.readType());
1055 MD->setReturnTypeSourceInfo(readTypeSourceInfo());
1056 MD->DeclEndLoc = readSourceLocation();
1057 unsigned NumParams = Record.readInt();
1058 SmallVector<ParmVarDecl *, 16> Params;
1059 Params.reserve(NumParams);
1060 for (unsigned I = 0; I != NumParams; ++I)
1061 Params.push_back(readDeclAs<ParmVarDecl>());
1062
1063 MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1064 unsigned NumStoredSelLocs = Record.readInt();
1065 SmallVector<SourceLocation, 16> SelLocs;
1066 SelLocs.reserve(NumStoredSelLocs);
1067 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1068 SelLocs.push_back(readSourceLocation());
1069
1070 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1071}
1072
1073void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1074 VisitTypedefNameDecl(D);
1075
1076 D->Variance = Record.readInt();
1077 D->Index = Record.readInt();
1078 D->VarianceLoc = readSourceLocation();
1079 D->ColonLoc = readSourceLocation();
1080}
1081
1082void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1083 VisitNamedDecl(CD);
1084 CD->setAtStartLoc(readSourceLocation());
1085 CD->setAtEndRange(readSourceRange());
1086}
1087
1088ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1089 unsigned numParams = Record.readInt();
1090 if (numParams == 0)
1091 return nullptr;
1092
1093 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1094 typeParams.reserve(numParams);
1095 for (unsigned i = 0; i != numParams; ++i) {
1096 auto *typeParam = readDeclAs<ObjCTypeParamDecl>();
1097 if (!typeParam)
1098 return nullptr;
1099
1100 typeParams.push_back(typeParam);
1101 }
1102
1103 SourceLocation lAngleLoc = readSourceLocation();
1104 SourceLocation rAngleLoc = readSourceLocation();
1105
1106 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1107 typeParams, rAngleLoc);
1108}
1109
1110void ASTDeclReader::ReadObjCDefinitionData(
1111 struct ObjCInterfaceDecl::DefinitionData &Data) {
1112 // Read the superclass.
1113 Data.SuperClassTInfo = readTypeSourceInfo();
1114
1115 Data.EndLoc = readSourceLocation();
1116 Data.HasDesignatedInitializers = Record.readInt();
1117
1118 // Read the directly referenced protocols and their SourceLocations.
1119 unsigned NumProtocols = Record.readInt();
1120 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1121 Protocols.reserve(NumProtocols);
1122 for (unsigned I = 0; I != NumProtocols; ++I)
1123 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1124 SmallVector<SourceLocation, 16> ProtoLocs;
1125 ProtoLocs.reserve(NumProtocols);
1126 for (unsigned I = 0; I != NumProtocols; ++I)
1127 ProtoLocs.push_back(readSourceLocation());
1128 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1129 Reader.getContext());
1130
1131 // Read the transitive closure of protocols referenced by this class.
1132 NumProtocols = Record.readInt();
1133 Protocols.clear();
1134 Protocols.reserve(NumProtocols);
1135 for (unsigned I = 0; I != NumProtocols; ++I)
1136 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1137 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1138 Reader.getContext());
1139}
1140
1141void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1142 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1143 // FIXME: odr checking?
1144}
1145
1146void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1147 RedeclarableResult Redecl = VisitRedeclarable(ID);
1148 VisitObjCContainerDecl(ID);
1149 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1150 mergeRedeclarable(ID, Redecl);
1151
1152 ID->TypeParamList = ReadObjCTypeParamList();
1153 if (Record.readInt()) {
1154 // Read the definition.
1155 ID->allocateDefinitionData();
1156
1157 ReadObjCDefinitionData(ID->data());
1158 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1159 if (Canon->Data.getPointer()) {
1160 // If we already have a definition, keep the definition invariant and
1161 // merge the data.
1162 MergeDefinitionData(Canon, std::move(ID->data()));
1163 ID->Data = Canon->Data;
1164 } else {
1165 // Set the definition data of the canonical declaration, so other
1166 // redeclarations will see it.
1167 ID->getCanonicalDecl()->Data = ID->Data;
1168
1169 // We will rebuild this list lazily.
1170 ID->setIvarList(nullptr);
1171 }
1172
1173 // Note that we have deserialized a definition.
1174 Reader.PendingDefinitions.insert(ID);
1175
1176 // Note that we've loaded this Objective-C class.
1177 Reader.ObjCClassesLoaded.push_back(ID);
1178 } else {
1179 ID->Data = ID->getCanonicalDecl()->Data;
1180 }
1181}
1182
1183void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1184 VisitFieldDecl(IVD);
1185 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1186 // This field will be built lazily.
1187 IVD->setNextIvar(nullptr);
1188 bool synth = Record.readInt();
1189 IVD->setSynthesize(synth);
1190}
1191
1192void ASTDeclReader::ReadObjCDefinitionData(
1193 struct ObjCProtocolDecl::DefinitionData &Data) {
1194 unsigned NumProtoRefs = Record.readInt();
1195 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1196 ProtoRefs.reserve(NumProtoRefs);
1197 for (unsigned I = 0; I != NumProtoRefs; ++I)
1198 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1199 SmallVector<SourceLocation, 16> ProtoLocs;
1200 ProtoLocs.reserve(NumProtoRefs);
1201 for (unsigned I = 0; I != NumProtoRefs; ++I)
1202 ProtoLocs.push_back(readSourceLocation());
1203 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1204 ProtoLocs.data(), Reader.getContext());
1205}
1206
1207void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1208 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1209 // FIXME: odr checking?
1210}
1211
1212void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1213 RedeclarableResult Redecl = VisitRedeclarable(PD);
1214 VisitObjCContainerDecl(PD);
1215 mergeRedeclarable(PD, Redecl);
1216
1217 if (Record.readInt()) {
1218 // Read the definition.
1219 PD->allocateDefinitionData();
1220
1221 ReadObjCDefinitionData(PD->data());
1222
1223 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1224 if (Canon->Data.getPointer()) {
1225 // If we already have a definition, keep the definition invariant and
1226 // merge the data.
1227 MergeDefinitionData(Canon, std::move(PD->data()));
1228 PD->Data = Canon->Data;
1229 } else {
1230 // Set the definition data of the canonical declaration, so other
1231 // redeclarations will see it.
1232 PD->getCanonicalDecl()->Data = PD->Data;
1233 }
1234 // Note that we have deserialized a definition.
1235 Reader.PendingDefinitions.insert(PD);
1236 } else {
1237 PD->Data = PD->getCanonicalDecl()->Data;
1238 }
1239}
1240
1241void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1242 VisitFieldDecl(FD);
1243}
1244
1245void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1246 VisitObjCContainerDecl(CD);
1247 CD->setCategoryNameLoc(readSourceLocation());
1248 CD->setIvarLBraceLoc(readSourceLocation());
1249 CD->setIvarRBraceLoc(readSourceLocation());
1250
1251 // Note that this category has been deserialized. We do this before
1252 // deserializing the interface declaration, so that it will consider this
1253 /// category.
1254 Reader.CategoriesDeserialized.insert(CD);
1255
1256 CD->ClassInterface = readDeclAs<ObjCInterfaceDecl>();
1257 CD->TypeParamList = ReadObjCTypeParamList();
1258 unsigned NumProtoRefs = Record.readInt();
1259 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1260 ProtoRefs.reserve(NumProtoRefs);
1261 for (unsigned I = 0; I != NumProtoRefs; ++I)
1262 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1263 SmallVector<SourceLocation, 16> ProtoLocs;
1264 ProtoLocs.reserve(NumProtoRefs);
1265 for (unsigned I = 0; I != NumProtoRefs; ++I)
1266 ProtoLocs.push_back(readSourceLocation());
1267 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1268 Reader.getContext());
1269
1270 // Protocols in the class extension belong to the class.
1271 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1272 CD->ClassInterface->mergeClassExtensionProtocolList(
1273 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1274 Reader.getContext());
1275}
1276
1277void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1278 VisitNamedDecl(CAD);
1279 CAD->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1280}
1281
1282void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1283 VisitNamedDecl(D);
1284 D->setAtLoc(readSourceLocation());
1285 D->setLParenLoc(readSourceLocation());
1286 QualType T = Record.readType();
1287 TypeSourceInfo *TSI = readTypeSourceInfo();
1288 D->setType(T, TSI);
1289 D->setPropertyAttributes((ObjCPropertyAttribute::Kind)Record.readInt());
1290 D->setPropertyAttributesAsWritten(
1291 (ObjCPropertyAttribute::Kind)Record.readInt());
1292 D->setPropertyImplementation(
1293 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1294 DeclarationName GetterName = Record.readDeclarationName();
1295 SourceLocation GetterLoc = readSourceLocation();
1296 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1297 DeclarationName SetterName = Record.readDeclarationName();
1298 SourceLocation SetterLoc = readSourceLocation();
1299 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1300 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1301 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1302 D->setPropertyIvarDecl(readDeclAs<ObjCIvarDecl>());
1303}
1304
1305void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1306 VisitObjCContainerDecl(D);
1307 D->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1308}
1309
1310void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1311 VisitObjCImplDecl(D);
1312 D->CategoryNameLoc = readSourceLocation();
1313}
1314
1315void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1316 VisitObjCImplDecl(D);
1317 D->setSuperClass(readDeclAs<ObjCInterfaceDecl>());
1318 D->SuperLoc = readSourceLocation();
1319 D->setIvarLBraceLoc(readSourceLocation());
1320 D->setIvarRBraceLoc(readSourceLocation());
1321 D->setHasNonZeroConstructors(Record.readInt());
1322 D->setHasDestructors(Record.readInt());
1323 D->NumIvarInitializers = Record.readInt();
1324 if (D->NumIvarInitializers)
1325 D->IvarInitializers = ReadGlobalOffset();
1326}
1327
1328void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1329 VisitDecl(D);
1330 D->setAtLoc(readSourceLocation());
1331 D->setPropertyDecl(readDeclAs<ObjCPropertyDecl>());
1332 D->PropertyIvarDecl = readDeclAs<ObjCIvarDecl>();
1333 D->IvarLoc = readSourceLocation();
1334 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1335 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1336 D->setGetterCXXConstructor(Record.readExpr());
1337 D->setSetterCXXAssignment(Record.readExpr());
1338}
1339
1340void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1341 VisitDeclaratorDecl(FD);
1342 FD->Mutable = Record.readInt();
1343
1344 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1345 FD->InitStorage.setInt(ISK);
1346 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1347 ? Record.readType().getAsOpaquePtr()
1348 : Record.readExpr());
1349 }
1350
1351 if (auto *BW = Record.readExpr())
1352 FD->setBitWidth(BW);
1353
1354 if (!FD->getDeclName()) {
1355 if (auto *Tmpl = readDeclAs<FieldDecl>())
1356 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1357 }
1358 mergeMergeable(FD);
1359}
1360
1361void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1362 VisitDeclaratorDecl(PD);
1363 PD->GetterId = Record.readIdentifier();
1364 PD->SetterId = Record.readIdentifier();
1365}
1366
1367void ASTDeclReader::VisitMSGuidDecl(MSGuidDecl *D) {
1368 VisitValueDecl(D);
1369 D->PartVal.Part1 = Record.readInt();
1370 D->PartVal.Part2 = Record.readInt();
1371 D->PartVal.Part3 = Record.readInt();
1372 for (auto &C : D->PartVal.Part4And5)
1373 C = Record.readInt();
1374
1375 // Add this GUID to the AST context's lookup structure, and merge if needed.
1376 if (MSGuidDecl *Existing = Reader.getContext().MSGuidDecls.GetOrInsertNode(D))
1377 Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());
1378}
1379
1380void ASTDeclReader::VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D) {
1381 VisitValueDecl(D);
1382 D->Value = Record.readAPValue();
1383
1384 // Add this template parameter object to the AST context's lookup structure,
1385 // and merge if needed.
1386 if (TemplateParamObjectDecl *Existing =
1387 Reader.getContext().TemplateParamObjectDecls.GetOrInsertNode(D))
1388 Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());
1389}
1390
1391void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1392 VisitValueDecl(FD);
1393
1394 FD->ChainingSize = Record.readInt();
1395 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2")((FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2"
) ? static_cast<void> (0) : __assert_fail ("FD->ChainingSize >= 2 && \"Anonymous chaining must be >= 2\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1395, __PRETTY_FUNCTION__))
;
1396 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1397
1398 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1399 FD->Chaining[I] = readDeclAs<NamedDecl>();
1400
1401 mergeMergeable(FD);
1402}
1403
1404ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1405 RedeclarableResult Redecl = VisitRedeclarable(VD);
1406 VisitDeclaratorDecl(VD);
1407
1408 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1409 VD->VarDeclBits.TSCSpec = Record.readInt();
1410 VD->VarDeclBits.InitStyle = Record.readInt();
1411 VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1412 if (!isa<ParmVarDecl>(VD)) {
1413 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1414 Record.readInt();
1415 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1416 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1417 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1418 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1419 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1420 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1421 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1422 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1423 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1424 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1425 VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1426 }
1427 auto VarLinkage = Linkage(Record.readInt());
1428 VD->setCachedLinkage(VarLinkage);
1429
1430 // Reconstruct the one piece of the IdentifierNamespace that we need.
1431 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1432 VD->getLexicalDeclContext()->isFunctionOrMethod())
1433 VD->setLocalExternDecl();
1434
1435 if (uint64_t Val = Record.readInt()) {
1436 VD->setInit(Record.readExpr());
1437 if (Val != 1) {
1438 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1439 Eval->HasConstantInitialization = (Val & 2) != 0;
1440 Eval->HasConstantDestruction = (Val & 4) != 0;
1441 }
1442 }
1443
1444 if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1445 Expr *CopyExpr = Record.readExpr();
1446 if (CopyExpr)
1447 Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1448 }
1449
1450 if (VD->getStorageDuration() == SD_Static && Record.readInt()) {
1451 Reader.DefinitionSource[VD] =
1452 Loc.F->Kind == ModuleKind::MK_MainFile ||
1453 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1454 }
1455
1456 enum VarKind {
1457 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1458 };
1459 switch ((VarKind)Record.readInt()) {
1460 case VarNotTemplate:
1461 // Only true variables (not parameters or implicit parameters) can be
1462 // merged; the other kinds are not really redeclarable at all.
1463 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1464 !isa<VarTemplateSpecializationDecl>(VD))
1465 mergeRedeclarable(VD, Redecl);
1466 break;
1467 case VarTemplate:
1468 // Merged when we merge the template.
1469 VD->setDescribedVarTemplate(readDeclAs<VarTemplateDecl>());
1470 break;
1471 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1472 auto *Tmpl = readDeclAs<VarDecl>();
1473 auto TSK = (TemplateSpecializationKind)Record.readInt();
1474 SourceLocation POI = readSourceLocation();
1475 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1476 mergeRedeclarable(VD, Redecl);
1477 break;
1478 }
1479 }
1480
1481 return Redecl;
1482}
1483
1484void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1485 VisitVarDecl(PD);
1486}
1487
1488void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1489 VisitVarDecl(PD);
1490 unsigned isObjCMethodParam = Record.readInt();
1491 unsigned scopeDepth = Record.readInt();
1492 unsigned scopeIndex = Record.readInt();
1493 unsigned declQualifier = Record.readInt();
1494 if (isObjCMethodParam) {
1495 assert(scopeDepth == 0)((scopeDepth == 0) ? static_cast<void> (0) : __assert_fail
("scopeDepth == 0", "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1495, __PRETTY_FUNCTION__))
;
1496 PD->setObjCMethodScopeInfo(scopeIndex);
1497 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1498 } else {
1499 PD->setScopeInfo(scopeDepth, scopeIndex);
1500 }
1501 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1502 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1503 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1504 PD->setUninstantiatedDefaultArg(Record.readExpr());
1505
1506 // FIXME: If this is a redeclaration of a function from another module, handle
1507 // inheritance of default arguments.
1508}
1509
1510void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1511 VisitVarDecl(DD);
1512 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1513 for (unsigned I = 0; I != DD->NumBindings; ++I) {
1514 BDs[I] = readDeclAs<BindingDecl>();
1515 BDs[I]->setDecomposedDecl(DD);
1516 }
1517}
1518
1519void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1520 VisitValueDecl(BD);
1521 BD->Binding = Record.readExpr();
1522}
1523
1524void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1525 VisitDecl(AD);
1526 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1527 AD->setRParenLoc(readSourceLocation());
1528}
1529
1530void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1531 VisitDecl(BD);
1532 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1533 BD->setSignatureAsWritten(readTypeSourceInfo());
1534 unsigned NumParams = Record.readInt();
1535 SmallVector<ParmVarDecl *, 16> Params;
1536 Params.reserve(NumParams);
1537 for (unsigned I = 0; I != NumParams; ++I)
1538 Params.push_back(readDeclAs<ParmVarDecl>());
1539 BD->setParams(Params);
1540
1541 BD->setIsVariadic(Record.readInt());
1542 BD->setBlockMissingReturnType(Record.readInt());
1543 BD->setIsConversionFromLambda(Record.readInt());
1544 BD->setDoesNotEscape(Record.readInt());
1545 BD->setCanAvoidCopyToHeap(Record.readInt());
1546
1547 bool capturesCXXThis = Record.readInt();
1548 unsigned numCaptures = Record.readInt();
1549 SmallVector<BlockDecl::Capture, 16> captures;
1550 captures.reserve(numCaptures);
1551 for (unsigned i = 0; i != numCaptures; ++i) {
1552 auto *decl = readDeclAs<VarDecl>();
1553 unsigned flags = Record.readInt();
1554 bool byRef = (flags & 1);
1555 bool nested = (flags & 2);
1556 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1557
1558 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1559 }
1560 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1561}
1562
1563void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1564 VisitDecl(CD);
1565 unsigned ContextParamPos = Record.readInt();
1566 CD->setNothrow(Record.readInt() != 0);
1567 // Body is set by VisitCapturedStmt.
1568 for (unsigned I = 0; I < CD->NumParams; ++I) {
1569 if (I != ContextParamPos)
1570 CD->setParam(I, readDeclAs<ImplicitParamDecl>());
1571 else
1572 CD->setContextParam(I, readDeclAs<ImplicitParamDecl>());
1573 }
1574}
1575
1576void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1577 VisitDecl(D);
1578 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1579 D->setExternLoc(readSourceLocation());
1580 D->setRBraceLoc(readSourceLocation());
1581}
1582
1583void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1584 VisitDecl(D);
1585 D->RBraceLoc = readSourceLocation();
1586}
1587
1588void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1589 VisitNamedDecl(D);
1590 D->setLocStart(readSourceLocation());
1591}
1592
1593void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1594 RedeclarableResult Redecl = VisitRedeclarable(D);
1595 VisitNamedDecl(D);
1596 D->setInline(Record.readInt());
1597 D->LocStart = readSourceLocation();
1598 D->RBraceLoc = readSourceLocation();
1599
1600 // Defer loading the anonymous namespace until we've finished merging
1601 // this namespace; loading it might load a later declaration of the
1602 // same namespace, and we have an invariant that older declarations
1603 // get merged before newer ones try to merge.
1604 GlobalDeclID AnonNamespace = 0;
1605 if (Redecl.getFirstID() == ThisDeclID) {
1606 AnonNamespace = readDeclID();
1607 } else {
1608 // Link this namespace back to the first declaration, which has already
1609 // been deserialized.
1610 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1611 }
1612
1613 mergeRedeclarable(D, Redecl);
1614
1615 if (AnonNamespace) {
1616 // Each module has its own anonymous namespace, which is disjoint from
1617 // any other module's anonymous namespaces, so don't attach the anonymous
1618 // namespace at all.
1619 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1620 if (!Record.isModule())
1621 D->setAnonymousNamespace(Anon);
1622 }
1623}
1624
1625void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1626 RedeclarableResult Redecl = VisitRedeclarable(D);
1
Calling 'ASTDeclReader::VisitRedeclarable'
1627 VisitNamedDecl(D);
1628 D->NamespaceLoc = readSourceLocation();
1629 D->IdentLoc = readSourceLocation();
1630 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1631 D->Namespace = readDeclAs<NamedDecl>();
1632 mergeRedeclarable(D, Redecl);
1633}
1634
1635void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1636 VisitNamedDecl(D);
1637 D->setUsingLoc(readSourceLocation());
1638 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1639 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1640 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1641 D->setTypename(Record.readInt());
1642 if (auto *Pattern = readDeclAs<NamedDecl>())
1643 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1644 mergeMergeable(D);
1645}
1646
1647void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1648 VisitNamedDecl(D);
1649 D->InstantiatedFrom = readDeclAs<NamedDecl>();
1650 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1651 for (unsigned I = 0; I != D->NumExpansions; ++I)
1652 Expansions[I] = readDeclAs<NamedDecl>();
1653 mergeMergeable(D);
1654}
1655
1656void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1657 RedeclarableResult Redecl = VisitRedeclarable(D);
1658 VisitNamedDecl(D);
1659 D->Underlying = readDeclAs<NamedDecl>();
1660 D->IdentifierNamespace = Record.readInt();
1661 D->UsingOrNextShadow = readDeclAs<NamedDecl>();
1662 auto *Pattern = readDeclAs<UsingShadowDecl>();
1663 if (Pattern)
1664 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1665 mergeRedeclarable(D, Redecl);
1666}
1667
1668void ASTDeclReader::VisitConstructorUsingShadowDecl(
1669 ConstructorUsingShadowDecl *D) {
1670 VisitUsingShadowDecl(D);
1671 D->NominatedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1672 D->ConstructedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1673 D->IsVirtual = Record.readInt();
1674}
1675
1676void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1677 VisitNamedDecl(D);
1678 D->UsingLoc = readSourceLocation();
1679 D->NamespaceLoc = readSourceLocation();
1680 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1681 D->NominatedNamespace = readDeclAs<NamedDecl>();
1682 D->CommonAncestor = readDeclAs<DeclContext>();
1683}
1684
1685void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1686 VisitValueDecl(D);
1687 D->setUsingLoc(readSourceLocation());
1688 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1689 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1690 D->EllipsisLoc = readSourceLocation();
1691 mergeMergeable(D);
1692}
1693
1694void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1695 UnresolvedUsingTypenameDecl *D) {
1696 VisitTypeDecl(D);
1697 D->TypenameLocation = readSourceLocation();
1698 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1699 D->EllipsisLoc = readSourceLocation();
1700 mergeMergeable(D);
1701}
1702
1703void ASTDeclReader::ReadCXXDefinitionData(
1704 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1705 #define FIELD(Name, Width, Merge) \
1706 Data.Name = Record.readInt();
1707 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1708
1709 // Note: the caller has deserialized the IsLambda bit already.
1710 Data.ODRHash = Record.readInt();
1711 Data.HasODRHash = true;
1712
1713 if (Record.readInt()) {
1714 Reader.DefinitionSource[D] =
1715 Loc.F->Kind == ModuleKind::MK_MainFile ||
1716 Reader.getContext().getLangOpts().BuildingPCHWithObjectFile;
1717 }
1718
1719 Data.NumBases = Record.readInt();
1720 if (Data.NumBases)
1721 Data.Bases = ReadGlobalOffset();
1722 Data.NumVBases = Record.readInt();
1723 if (Data.NumVBases)
1724 Data.VBases = ReadGlobalOffset();
1725
1726 Record.readUnresolvedSet(Data.Conversions);
1727 Data.ComputedVisibleConversions = Record.readInt();
1728 if (Data.ComputedVisibleConversions)
1729 Record.readUnresolvedSet(Data.VisibleConversions);
1730 assert(Data.Definition && "Data.Definition should be already set!")((Data.Definition && "Data.Definition should be already set!"
) ? static_cast<void> (0) : __assert_fail ("Data.Definition && \"Data.Definition should be already set!\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1730, __PRETTY_FUNCTION__))
;
1731 Data.FirstFriend = readDeclID();
1732
1733 if (Data.IsLambda) {
1734 using Capture = LambdaCapture;
1735
1736 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1737 Lambda.Dependent = Record.readInt();
1738 Lambda.IsGenericLambda = Record.readInt();
1739 Lambda.CaptureDefault = Record.readInt();
1740 Lambda.NumCaptures = Record.readInt();
1741 Lambda.NumExplicitCaptures = Record.readInt();
1742 Lambda.HasKnownInternalLinkage = Record.readInt();
1743 Lambda.ManglingNumber = Record.readInt();
1744 Lambda.ContextDecl = readDeclID();
1745 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1746 sizeof(Capture) * Lambda.NumCaptures);
1747 Capture *ToCapture = Lambda.Captures;
1748 Lambda.MethodTyInfo = readTypeSourceInfo();
1749 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1750 SourceLocation Loc = readSourceLocation();
1751 bool IsImplicit = Record.readInt();
1752 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1753 switch (Kind) {
1754 case LCK_StarThis:
1755 case LCK_This:
1756 case LCK_VLAType:
1757 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1758 break;
1759 case LCK_ByCopy:
1760 case LCK_ByRef:
1761 auto *Var = readDeclAs<VarDecl>();
1762 SourceLocation EllipsisLoc = readSourceLocation();
1763 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1764 break;
1765 }
1766 }
1767 }
1768}
1769
1770void ASTDeclReader::MergeDefinitionData(
1771 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1772 assert(D->DefinitionData &&((D->DefinitionData && "merging class definition into non-definition"
) ? static_cast<void> (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1773, __PRETTY_FUNCTION__))
1773 "merging class definition into non-definition")((D->DefinitionData && "merging class definition into non-definition"
) ? static_cast<void> (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1773, __PRETTY_FUNCTION__))
;
1774 auto &DD = *D->DefinitionData;
1775
1776 if (DD.Definition != MergeDD.Definition) {
1777 // Track that we merged the definitions.
1778 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1779 DD.Definition));
1780 Reader.PendingDefinitions.erase(MergeDD.Definition);
1781 MergeDD.Definition->setCompleteDefinition(false);
1782 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1783 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&((Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end
() && "already loaded pending lookups for merged definition"
) ? static_cast<void> (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1784, __PRETTY_FUNCTION__))
1784 "already loaded pending lookups for merged definition")((Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end
() && "already loaded pending lookups for merged definition"
) ? static_cast<void> (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1784, __PRETTY_FUNCTION__))
;
1785 }
1786
1787 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1788 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1789 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1790 // We faked up this definition data because we found a class for which we'd
1791 // not yet loaded the definition. Replace it with the real thing now.
1792 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?")((!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?"
) ? static_cast<void> (0) : __assert_fail ("!DD.IsLambda && !MergeDD.IsLambda && \"faked up lambda definition?\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1792, __PRETTY_FUNCTION__))
;
1793 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1794
1795 // Don't change which declaration is the definition; that is required
1796 // to be invariant once we select it.
1797 auto *Def = DD.Definition;
1798 DD = std::move(MergeDD);
1799 DD.Definition = Def;
1800 return;
1801 }
1802
1803 bool DetectedOdrViolation = false;
1804
1805 #define FIELD(Name, Width, Merge) Merge(Name)
1806 #define MERGE_OR(Field) DD.Field |= MergeDD.Field;
1807 #define NO_MERGE(Field) \
1808 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1809 MERGE_OR(Field)
1810 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1811 NO_MERGE(IsLambda)
1812 #undef NO_MERGE
1813 #undef MERGE_OR
1814
1815 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1816 DetectedOdrViolation = true;
1817 // FIXME: Issue a diagnostic if the base classes don't match when we come
1818 // to lazily load them.
1819
1820 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1821 // match when we come to lazily load them.
1822 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1823 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1824 DD.ComputedVisibleConversions = true;
1825 }
1826
1827 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1828 // lazily load it.
1829
1830 if (DD.IsLambda) {
1831 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1832 // when they occur within the body of a function template specialization).
1833 }
1834
1835 if (D->getODRHash() != MergeDD.ODRHash) {
1836 DetectedOdrViolation = true;
1837 }
1838
1839 if (DetectedOdrViolation)
1840 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1841 {MergeDD.Definition, &MergeDD});
1842}
1843
1844void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1845 struct CXXRecordDecl::DefinitionData *DD;
1846 ASTContext &C = Reader.getContext();
1847
1848 // Determine whether this is a lambda closure type, so that we can
1849 // allocate the appropriate DefinitionData structure.
1850 bool IsLambda = Record.readInt();
1851 if (IsLambda)
1852 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1853 LCD_None);
1854 else
1855 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1856
1857 CXXRecordDecl *Canon = D->getCanonicalDecl();
1858 // Set decl definition data before reading it, so that during deserialization
1859 // when we read CXXRecordDecl, it already has definition data and we don't
1860 // set fake one.
1861 if (!Canon->DefinitionData)
1862 Canon->DefinitionData = DD;
1863 D->DefinitionData = Canon->DefinitionData;
1864 ReadCXXDefinitionData(*DD, D);
1865
1866 // We might already have a different definition for this record. This can
1867 // happen either because we're reading an update record, or because we've
1868 // already done some merging. Either way, just merge into it.
1869 if (Canon->DefinitionData != DD) {
1870 MergeDefinitionData(Canon, std::move(*DD));
1871 return;
1872 }
1873
1874 // Mark this declaration as being a definition.
1875 D->setCompleteDefinition(true);
1876
1877 // If this is not the first declaration or is an update record, we can have
1878 // other redeclarations already. Make a note that we need to propagate the
1879 // DefinitionData pointer onto them.
1880 if (Update || Canon != D)
1881 Reader.PendingDefinitions.insert(D);
1882}
1883
1884ASTDeclReader::RedeclarableResult
1885ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1886 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1887
1888 ASTContext &C = Reader.getContext();
1889
1890 enum CXXRecKind {
1891 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1892 };
1893 switch ((CXXRecKind)Record.readInt()) {
1894 case CXXRecNotTemplate:
1895 // Merged when we merge the folding set entry in the primary template.
1896 if (!isa<ClassTemplateSpecializationDecl>(D))
1897 mergeRedeclarable(D, Redecl);
1898 break;
1899 case CXXRecTemplate: {
1900 // Merged when we merge the template.
1901 auto *Template = readDeclAs<ClassTemplateDecl>();
1902 D->TemplateOrInstantiation = Template;
1903 if (!Template->getTemplatedDecl()) {
1904 // We've not actually loaded the ClassTemplateDecl yet, because we're
1905 // currently being loaded as its pattern. Rely on it to set up our
1906 // TypeForDecl (see VisitClassTemplateDecl).
1907 //
1908 // Beware: we do not yet know our canonical declaration, and may still
1909 // get merged once the surrounding class template has got off the ground.
1910 DeferredTypeID = 0;
1911 }
1912 break;
1913 }
1914 case CXXRecMemberSpecialization: {
1915 auto *RD = readDeclAs<CXXRecordDecl>();
1916 auto TSK = (TemplateSpecializationKind)Record.readInt();
1917 SourceLocation POI = readSourceLocation();
1918 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1919 MSI->setPointOfInstantiation(POI);
1920 D->TemplateOrInstantiation = MSI;
1921 mergeRedeclarable(D, Redecl);
1922 break;
1923 }
1924 }
1925
1926 bool WasDefinition = Record.readInt();
1927 if (WasDefinition)
1928 ReadCXXRecordDefinition(D, /*Update*/false);
1929 else
1930 // Propagate DefinitionData pointer from the canonical declaration.
1931 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1932
1933 // Lazily load the key function to avoid deserializing every method so we can
1934 // compute it.
1935 if (WasDefinition) {
1936 DeclID KeyFn = readDeclID();
1937 if (KeyFn && D->isCompleteDefinition())
1938 // FIXME: This is wrong for the ARM ABI, where some other module may have
1939 // made this function no longer be a key function. We need an update
1940 // record or similar for that case.
1941 C.KeyFunctions[D] = KeyFn;
1942 }
1943
1944 return Redecl;
1945}
1946
1947void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1948 D->setExplicitSpecifier(Record.readExplicitSpec());
1949 VisitFunctionDecl(D);
1950 D->setIsCopyDeductionCandidate(Record.readInt());
1951}
1952
1953void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1954 VisitFunctionDecl(D);
1955
1956 unsigned NumOverridenMethods = Record.readInt();
1957 if (D->isCanonicalDecl()) {
1958 while (NumOverridenMethods--) {
1959 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1960 // MD may be initializing.
1961 if (auto *MD = readDeclAs<CXXMethodDecl>())
1962 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1963 }
1964 } else {
1965 // We don't care about which declarations this used to override; we get
1966 // the relevant information from the canonical declaration.
1967 Record.skipInts(NumOverridenMethods);
1968 }
1969}
1970
1971void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1972 // We need the inherited constructor information to merge the declaration,
1973 // so we have to read it before we call VisitCXXMethodDecl.
1974 D->setExplicitSpecifier(Record.readExplicitSpec());
1975 if (D->isInheritingConstructor()) {
1976 auto *Shadow = readDeclAs<ConstructorUsingShadowDecl>();
1977 auto *Ctor = readDeclAs<CXXConstructorDecl>();
1978 *D->getTrailingObjects<InheritedConstructor>() =
1979 InheritedConstructor(Shadow, Ctor);
1980 }
1981
1982 VisitCXXMethodDecl(D);
1983}
1984
1985void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1986 VisitCXXMethodDecl(D);
1987
1988 if (auto *OperatorDelete = readDeclAs<FunctionDecl>()) {
1989 CXXDestructorDecl *Canon = D->getCanonicalDecl();
1990 auto *ThisArg = Record.readExpr();
1991 // FIXME: Check consistency if we have an old and new operator delete.
1992 if (!Canon->OperatorDelete) {
1993 Canon->OperatorDelete = OperatorDelete;
1994 Canon->OperatorDeleteThisArg = ThisArg;
1995 }
1996 }
1997}
1998
1999void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
2000 D->setExplicitSpecifier(Record.readExplicitSpec());
2001 VisitCXXMethodDecl(D);
2002}
2003
2004void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
2005 VisitDecl(D);
2006 D->ImportedModule = readModule();
2007 D->setImportComplete(Record.readInt());
2008 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2009 for (unsigned I = 0, N = Record.back(); I != N; ++I)
2010 StoredLocs[I] = readSourceLocation();
2011 Record.skipInts(1); // The number of stored source locations.
2012}
2013
2014void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
2015 VisitDecl(D);
2016 D->setColonLoc(readSourceLocation());
2017}
2018
2019void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
2020 VisitDecl(D);
2021 if (Record.readInt()) // hasFriendDecl
2022 D->Friend = readDeclAs<NamedDecl>();
2023 else
2024 D->Friend = readTypeSourceInfo();
2025 for (unsigned i = 0; i != D->NumTPLists; ++i)
2026 D->getTrailingObjects<TemplateParameterList *>()[i] =
2027 Record.readTemplateParameterList();
2028 D->NextFriend = readDeclID();
2029 D->UnsupportedFriend = (Record.readInt() != 0);
2030 D->FriendLoc = readSourceLocation();
2031}
2032
2033void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
2034 VisitDecl(D);
2035 unsigned NumParams = Record.readInt();
2036 D->NumParams = NumParams;
2037 D->Params = new TemplateParameterList*[NumParams];
2038 for (unsigned i = 0; i != NumParams; ++i)
2039 D->Params[i] = Record.readTemplateParameterList();
2040 if (Record.readInt()) // HasFriendDecl
2041 D->Friend = readDeclAs<NamedDecl>();
2042 else
2043 D->Friend = readTypeSourceInfo();
2044 D->FriendLoc = readSourceLocation();
2045}
2046
2047DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2048 VisitNamedDecl(D);
2049
2050 DeclID PatternID = readDeclID();
2051 auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2052 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2053 D->init(TemplatedDecl, TemplateParams);
2054
2055 return PatternID;
2056}
2057
2058void ASTDeclReader::VisitConceptDecl(ConceptDecl *D) {
2059 VisitTemplateDecl(D);
2060 D->ConstraintExpr = Record.readExpr();
2061 mergeMergeable(D);
2062}
2063
2064void ASTDeclReader::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) {
2065}
2066
2067ASTDeclReader::RedeclarableResult
2068ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2069 RedeclarableResult Redecl = VisitRedeclarable(D);
2070
2071 // Make sure we've allocated the Common pointer first. We do this before
2072 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2073 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2074 if (!CanonD->Common) {
2075 CanonD->Common = CanonD->newCommon(Reader.getContext());
2076 Reader.PendingDefinitions.insert(CanonD);
2077 }
2078 D->Common = CanonD->Common;
2079
2080 // If this is the first declaration of the template, fill in the information
2081 // for the 'common' pointer.
2082 if (ThisDeclID == Redecl.getFirstID()) {
2083 if (auto *RTD = readDeclAs<RedeclarableTemplateDecl>()) {
2084 assert(RTD->getKind() == D->getKind() &&((RTD->getKind() == D->getKind() && "InstantiatedFromMemberTemplate kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2085, __PRETTY_FUNCTION__))
2085 "InstantiatedFromMemberTemplate kind mismatch")((RTD->getKind() == D->getKind() && "InstantiatedFromMemberTemplate kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2085, __PRETTY_FUNCTION__))
;
2086 D->setInstantiatedFromMemberTemplate(RTD);
2087 if (Record.readInt())
2088 D->setMemberSpecialization();
2089 }
2090 }
2091
2092 DeclID PatternID = VisitTemplateDecl(D);
2093 D->IdentifierNamespace = Record.readInt();
2094
2095 mergeRedeclarable(D, Redecl, PatternID);
2096
2097 // If we merged the template with a prior declaration chain, merge the common
2098 // pointer.
2099 // FIXME: Actually merge here, don't just overwrite.
2100 D->Common = D->getCanonicalDecl()->Common;
2101
2102 return Redecl;
2103}
2104
2105void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2106 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2107
2108 if (ThisDeclID == Redecl.getFirstID()) {
2109 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2110 // the specializations.
2111 SmallVector<serialization::DeclID, 32> SpecIDs;
2112 readDeclIDList(SpecIDs);
2113 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2114 }
2115
2116 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2117 // We were loaded before our templated declaration was. We've not set up
2118 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2119 // it now.
2120 Reader.getContext().getInjectedClassNameType(
2121 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2122 }
2123}
2124
2125void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2126 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2126)
;
2127}
2128
2129/// TODO: Unify with ClassTemplateDecl version?
2130/// May require unifying ClassTemplateDecl and
2131/// VarTemplateDecl beyond TemplateDecl...
2132void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2133 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2134
2135 if (ThisDeclID == Redecl.getFirstID()) {
2136 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2137 // the specializations.
2138 SmallVector<serialization::DeclID, 32> SpecIDs;
2139 readDeclIDList(SpecIDs);
2140 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2141 }
2142}
2143
2144ASTDeclReader::RedeclarableResult
2145ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2146 ClassTemplateSpecializationDecl *D) {
2147 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2148
2149 ASTContext &C = Reader.getContext();
2150 if (Decl *InstD = readDecl()) {
2151 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2152 D->SpecializedTemplate = CTD;
2153 } else {
2154 SmallVector<TemplateArgument, 8> TemplArgs;
2155 Record.readTemplateArgumentList(TemplArgs);
2156 TemplateArgumentList *ArgList
2157 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2158 auto *PS =
2159 new (C) ClassTemplateSpecializationDecl::
2160 SpecializedPartialSpecialization();
2161 PS->PartialSpecialization
2162 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2163 PS->TemplateArgs = ArgList;
2164 D->SpecializedTemplate = PS;
2165 }
2166 }
2167
2168 SmallVector<TemplateArgument, 8> TemplArgs;
2169 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2170 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2171 D->PointOfInstantiation = readSourceLocation();
2172 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2173
2174 bool writtenAsCanonicalDecl = Record.readInt();
2175 if (writtenAsCanonicalDecl) {
2176 auto *CanonPattern = readDeclAs<ClassTemplateDecl>();
2177 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2178 // Set this as, or find, the canonical declaration for this specialization
2179 ClassTemplateSpecializationDecl *CanonSpec;
2180 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2181 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2182 .GetOrInsertNode(Partial);
2183 } else {
2184 CanonSpec =
2185 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2186 }
2187 // If there was already a canonical specialization, merge into it.
2188 if (CanonSpec != D) {
2189 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2190
2191 // This declaration might be a definition. Merge with any existing
2192 // definition.
2193 if (auto *DDD = D->DefinitionData) {
2194 if (CanonSpec->DefinitionData)
2195 MergeDefinitionData(CanonSpec, std::move(*DDD));
2196 else
2197 CanonSpec->DefinitionData = D->DefinitionData;
2198 }
2199 D->DefinitionData = CanonSpec->DefinitionData;
2200 }
2201 }
2202 }
2203
2204 // Explicit info.
2205 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2206 auto *ExplicitInfo =
2207 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2208 ExplicitInfo->TypeAsWritten = TyInfo;
2209 ExplicitInfo->ExternLoc = readSourceLocation();
2210 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2211 D->ExplicitInfo = ExplicitInfo;
2212 }
2213
2214 return Redecl;
2215}
2216
2217void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2218 ClassTemplatePartialSpecializationDecl *D) {
2219 // We need to read the template params first because redeclarable is going to
2220 // need them for profiling
2221 TemplateParameterList *Params = Record.readTemplateParameterList();
2222 D->TemplateParams = Params;
2223 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2224
2225 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2226
2227 // These are read/set from/to the first declaration.
2228 if (ThisDeclID == Redecl.getFirstID()) {
2229 D->InstantiatedFromMember.setPointer(
2230 readDeclAs<ClassTemplatePartialSpecializationDecl>());
2231 D->InstantiatedFromMember.setInt(Record.readInt());
2232 }
2233}
2234
2235void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2236 ClassScopeFunctionSpecializationDecl *D) {
2237 VisitDecl(D);
2238 D->Specialization = readDeclAs<CXXMethodDecl>();
2239 if (Record.readInt())
2240 D->TemplateArgs = Record.readASTTemplateArgumentListInfo();
2241}
2242
2243void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2244 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2245
2246 if (ThisDeclID == Redecl.getFirstID()) {
2247 // This FunctionTemplateDecl owns a CommonPtr; read it.
2248 SmallVector<serialization::DeclID, 32> SpecIDs;
2249 readDeclIDList(SpecIDs);
2250 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2251 }
2252}
2253
2254/// TODO: Unify with ClassTemplateSpecializationDecl version?
2255/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2256/// VarTemplate(Partial)SpecializationDecl with a new data
2257/// structure Template(Partial)SpecializationDecl, and
2258/// using Template(Partial)SpecializationDecl as input type.
2259ASTDeclReader::RedeclarableResult
2260ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2261 VarTemplateSpecializationDecl *D) {
2262 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2263
2264 ASTContext &C = Reader.getContext();
2265 if (Decl *InstD = readDecl()) {
2266 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2267 D->SpecializedTemplate = VTD;
2268 } else {
2269 SmallVector<TemplateArgument, 8> TemplArgs;
2270 Record.readTemplateArgumentList(TemplArgs);
2271 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2272 C, TemplArgs);
2273 auto *PS =
2274 new (C)
2275 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2276 PS->PartialSpecialization =
2277 cast<VarTemplatePartialSpecializationDecl>(InstD);
2278 PS->TemplateArgs = ArgList;
2279 D->SpecializedTemplate = PS;
2280 }
2281 }
2282
2283 // Explicit info.
2284 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2285 auto *ExplicitInfo =
2286 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2287 ExplicitInfo->TypeAsWritten = TyInfo;
2288 ExplicitInfo->ExternLoc = readSourceLocation();
2289 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2290 D->ExplicitInfo = ExplicitInfo;
2291 }
2292
2293 SmallVector<TemplateArgument, 8> TemplArgs;
2294 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2295 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2296 D->PointOfInstantiation = readSourceLocation();
2297 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2298 D->IsCompleteDefinition = Record.readInt();
2299
2300 bool writtenAsCanonicalDecl = Record.readInt();
2301 if (writtenAsCanonicalDecl) {
2302 auto *CanonPattern = readDeclAs<VarTemplateDecl>();
2303 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2304 // FIXME: If it's already present, merge it.
2305 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2306 CanonPattern->getCommonPtr()->PartialSpecializations
2307 .GetOrInsertNode(Partial);
2308 } else {
2309 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2310 }
2311 }
2312 }
2313
2314 return Redecl;
2315}
2316
2317/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2318/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2319/// VarTemplate(Partial)SpecializationDecl with a new data
2320/// structure Template(Partial)SpecializationDecl, and
2321/// using Template(Partial)SpecializationDecl as input type.
2322void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2323 VarTemplatePartialSpecializationDecl *D) {
2324 TemplateParameterList *Params = Record.readTemplateParameterList();
2325 D->TemplateParams = Params;
2326 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2327
2328 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2329
2330 // These are read/set from/to the first declaration.
2331 if (ThisDeclID == Redecl.getFirstID()) {
2332 D->InstantiatedFromMember.setPointer(
2333 readDeclAs<VarTemplatePartialSpecializationDecl>());
2334 D->InstantiatedFromMember.setInt(Record.readInt());
2335 }
2336}
2337
2338void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2339 VisitTypeDecl(D);
2340
2341 D->setDeclaredWithTypename(Record.readInt());
2342
2343 if (Record.readBool()) {
2344 NestedNameSpecifierLoc NNS = Record.readNestedNameSpecifierLoc();
2345 DeclarationNameInfo DN = Record.readDeclarationNameInfo();
2346 ConceptDecl *NamedConcept = Record.readDeclAs<ConceptDecl>();
2347 const ASTTemplateArgumentListInfo *ArgsAsWritten = nullptr;
2348 if (Record.readBool())
2349 ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2350 Expr *ImmediatelyDeclaredConstraint = Record.readExpr();
2351 D->setTypeConstraint(NNS, DN, /*FoundDecl=*/nullptr, NamedConcept,
2352 ArgsAsWritten, ImmediatelyDeclaredConstraint);
2353 if ((D->ExpandedParameterPack = Record.readInt()))
2354 D->NumExpanded = Record.readInt();
2355 }
2356
2357 if (Record.readInt())
2358 D->setDefaultArgument(readTypeSourceInfo());
2359}
2360
2361void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2362 VisitDeclaratorDecl(D);
2363 // TemplateParmPosition.
2364 D->setDepth(Record.readInt());
2365 D->setPosition(Record.readInt());
2366 if (D->hasPlaceholderTypeConstraint())
2367 D->setPlaceholderTypeConstraint(Record.readExpr());
2368 if (D->isExpandedParameterPack()) {
2369 auto TypesAndInfos =
2370 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2371 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2372 new (&TypesAndInfos[I].first) QualType(Record.readType());
2373 TypesAndInfos[I].second = readTypeSourceInfo();
2374 }
2375 } else {
2376 // Rest of NonTypeTemplateParmDecl.
2377 D->ParameterPack = Record.readInt();
2378 if (Record.readInt())
2379 D->setDefaultArgument(Record.readExpr());
2380 }
2381}
2382
2383void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2384 VisitTemplateDecl(D);
2385 // TemplateParmPosition.
2386 D->setDepth(Record.readInt());
2387 D->setPosition(Record.readInt());
2388 if (D->isExpandedParameterPack()) {
2389 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2390 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2391 I != N; ++I)
2392 Data[I] = Record.readTemplateParameterList();
2393 } else {
2394 // Rest of TemplateTemplateParmDecl.
2395 D->ParameterPack = Record.readInt();
2396 if (Record.readInt())
2397 D->setDefaultArgument(Reader.getContext(),
2398 Record.readTemplateArgumentLoc());
2399 }
2400}
2401
2402void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2403 VisitRedeclarableTemplateDecl(D);
2404}
2405
2406void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2407 VisitDecl(D);
2408 D->AssertExprAndFailed.setPointer(Record.readExpr());
2409 D->AssertExprAndFailed.setInt(Record.readInt());
2410 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2411 D->RParenLoc = readSourceLocation();
2412}
2413
2414void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2415 VisitDecl(D);
2416}
2417
2418void ASTDeclReader::VisitLifetimeExtendedTemporaryDecl(
2419 LifetimeExtendedTemporaryDecl *D) {
2420 VisitDecl(D);
2421 D->ExtendingDecl = readDeclAs<ValueDecl>();
2422 D->ExprWithTemporary = Record.readStmt();
2423 if (Record.readInt()) {
2424 D->Value = new (D->getASTContext()) APValue(Record.readAPValue());
2425 D->getASTContext().addDestruction(D->Value);
2426 }
2427 D->ManglingNumber = Record.readInt();
2428 mergeMergeable(D);
2429}
2430
2431std::pair<uint64_t, uint64_t>
2432ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2433 uint64_t LexicalOffset = ReadLocalOffset();
2434 uint64_t VisibleOffset = ReadLocalOffset();
2435 return std::make_pair(LexicalOffset, VisibleOffset);
2436}
2437
2438template <typename T>
2439ASTDeclReader::RedeclarableResult
2440ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2441 DeclID FirstDeclID = readDeclID();
2442 Decl *MergeWith = nullptr;
2443
2444 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2
Assuming 'FirstDeclID' is not equal to field 'ThisDeclID'
2445 bool IsFirstLocalDecl = false;
2446
2447 uint64_t RedeclOffset = 0;
2448
2449 // 0 indicates that this declaration was the only declaration of its entity,
2450 // and is used for space optimization.
2451 if (FirstDeclID == 0) {
3
Assuming 'FirstDeclID' is not equal to 0
4
Taking false branch
2452 FirstDeclID = ThisDeclID;
2453 IsKeyDecl = true;
2454 IsFirstLocalDecl = true;
2455 } else if (unsigned N = Record.readInt()) {
5
Assuming 'N' is 0
6
Taking false branch
2456 // This declaration was the first local declaration, but may have imported
2457 // other declarations.
2458 IsKeyDecl = N == 1;
2459 IsFirstLocalDecl = true;
2460
2461 // We have some declarations that must be before us in our redeclaration
2462 // chain. Read them now, and remember that we ought to merge with one of
2463 // them.
2464 // FIXME: Provide a known merge target to the second and subsequent such
2465 // declaration.
2466 for (unsigned I = 0; I != N - 1; ++I)
2467 MergeWith = readDecl();
2468
2469 RedeclOffset = ReadLocalOffset();
2470 } else {
2471 // This declaration was not the first local declaration. Read the first
2472 // local declaration now, to trigger the import of other redeclarations.
2473 (void)readDecl();
2474 }
2475
2476 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
7
Assuming null pointer is passed into cast
8
'FirstDecl' initialized to a null pointer value
2477 if (FirstDecl != D) {
9
Assuming 'FirstDecl' is not equal to 'D'
10
Taking true branch
2478 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2479 // We temporarily set the first (canonical) declaration as the previous one
2480 // which is the one that matters and mark the real previous DeclID to be
2481 // loaded & attached later on.
2482 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2483 D->First = FirstDecl->getCanonicalDecl();
11
Called C++ object pointer is null
2484 }
2485
2486 auto *DAsT = static_cast<T *>(D);
2487
2488 // Note that we need to load local redeclarations of this decl and build a
2489 // decl chain for them. This must happen *after* we perform the preloading
2490 // above; this ensures that the redeclaration chain is built in the correct
2491 // order.
2492 if (IsFirstLocalDecl)
2493 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2494
2495 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2496}
2497
2498/// Attempts to merge the given declaration (D) with another declaration
2499/// of the same entity.
2500template<typename T>
2501void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2502 RedeclarableResult &Redecl,
2503 DeclID TemplatePatternID) {
2504 // If modules are not available, there is no reason to perform this merge.
2505 if (!Reader.getContext().getLangOpts().Modules)
2506 return;
2507
2508 // If we're not the canonical declaration, we don't need to merge.
2509 if (!DBase->isFirstDecl())
2510 return;
2511
2512 auto *D = static_cast<T *>(DBase);
2513
2514 if (auto *Existing = Redecl.getKnownMergeTarget())
2515 // We already know of an existing declaration we should merge with.
2516 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2517 else if (FindExistingResult ExistingRes = findExisting(D))
2518 if (T *Existing = ExistingRes)
2519 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2520}
2521
2522/// "Cast" to type T, asserting if we don't have an implicit conversion.
2523/// We use this to put code in a template that will only be valid for certain
2524/// instantiations.
2525template<typename T> static T assert_cast(T t) { return t; }
2526template<typename T> static T assert_cast(...) {
2527 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2527)
;
2528}
2529
2530/// Merge together the pattern declarations from two template
2531/// declarations.
2532void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2533 RedeclarableTemplateDecl *Existing,
2534 DeclID DsID, bool IsKeyDecl) {
2535 auto *DPattern = D->getTemplatedDecl();
2536 auto *ExistingPattern = Existing->getTemplatedDecl();
2537 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2538 DPattern->getCanonicalDecl()->getGlobalID(),
2539 IsKeyDecl);
2540
2541 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2542 // Merge with any existing definition.
2543 // FIXME: This is duplicated in several places. Refactor.
2544 auto *ExistingClass =
2545 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2546 if (auto *DDD = DClass->DefinitionData) {
2547 if (ExistingClass->DefinitionData) {
2548 MergeDefinitionData(ExistingClass, std::move(*DDD));
2549 } else {
2550 ExistingClass->DefinitionData = DClass->DefinitionData;
2551 // We may have skipped this before because we thought that DClass
2552 // was the canonical declaration.
2553 Reader.PendingDefinitions.insert(DClass);
2554 }
2555 }
2556 DClass->DefinitionData = ExistingClass->DefinitionData;
2557
2558 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2559 Result);
2560 }
2561 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2562 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2563 Result);
2564 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2565 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2566 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2567 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2568 Result);
2569 llvm_unreachable("merged an unknown kind of redeclarable template")::llvm::llvm_unreachable_internal("merged an unknown kind of redeclarable template"
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2569)
;
2570}
2571
2572/// Attempts to merge the given declaration (D) with another declaration
2573/// of the same entity.
2574template<typename T>
2575void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2576 RedeclarableResult &Redecl,
2577 DeclID TemplatePatternID) {
2578 auto *D = static_cast<T *>(DBase);
2579 T *ExistingCanon = Existing->getCanonicalDecl();
2580 T *DCanon = D->getCanonicalDecl();
2581 if (ExistingCanon != DCanon) {
2582 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&((DCanon->getGlobalID() == Redecl.getFirstID() && "already merged this declaration"
) ? static_cast<void> (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2583, __PRETTY_FUNCTION__))
2583 "already merged this declaration")((DCanon->getGlobalID() == Redecl.getFirstID() && "already merged this declaration"
) ? static_cast<void> (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2583, __PRETTY_FUNCTION__))
;
2584
2585 // Have our redeclaration link point back at the canonical declaration
2586 // of the existing declaration, so that this declaration has the
2587 // appropriate canonical declaration.
2588 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2589 D->First = ExistingCanon;
2590 ExistingCanon->Used |= D->Used;
2591 D->Used = false;
2592
2593 // When we merge a namespace, update its pointer to the first namespace.
2594 // We cannot have loaded any redeclarations of this declaration yet, so
2595 // there's nothing else that needs to be updated.
2596 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2597 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2598 assert_cast<NamespaceDecl*>(ExistingCanon));
2599
2600 // When we merge a template, merge its pattern.
2601 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2602 mergeTemplatePattern(
2603 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2604 TemplatePatternID, Redecl.isKeyDecl());
2605
2606 // If this declaration is a key declaration, make a note of that.
2607 if (Redecl.isKeyDecl())
2608 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2609 }
2610}
2611
2612/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2613/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2614/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2615/// that some types are mergeable during deserialization, otherwise name
2616/// lookup fails. This is the case for EnumConstantDecl.
2617static bool allowODRLikeMergeInC(NamedDecl *ND) {
2618 if (!ND)
2619 return false;
2620 // TODO: implement merge for other necessary decls.
2621 if (isa<EnumConstantDecl>(ND))
2622 return true;
2623 return false;
2624}
2625
2626/// Attempts to merge LifetimeExtendedTemporaryDecl with
2627/// identical class definitions from two different modules.
2628void ASTDeclReader::mergeMergeable(LifetimeExtendedTemporaryDecl *D) {
2629 // If modules are not available, there is no reason to perform this merge.
2630 if (!Reader.getContext().getLangOpts().Modules)
2631 return;
2632
2633 LifetimeExtendedTemporaryDecl *LETDecl = D;
2634
2635 LifetimeExtendedTemporaryDecl *&LookupResult =
2636 Reader.LETemporaryForMerging[std::make_pair(
2637 LETDecl->getExtendingDecl(), LETDecl->getManglingNumber())];
2638 if (LookupResult)
2639 Reader.getContext().setPrimaryMergedDecl(LETDecl,
2640 LookupResult->getCanonicalDecl());
2641 else
2642 LookupResult = LETDecl;
2643}
2644
2645/// Attempts to merge the given declaration (D) with another declaration
2646/// of the same entity, for the case where the entity is not actually
2647/// redeclarable. This happens, for instance, when merging the fields of
2648/// identical class definitions from two different modules.
2649template<typename T>
2650void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2651 // If modules are not available, there is no reason to perform this merge.
2652 if (!Reader.getContext().getLangOpts().Modules)
2653 return;
2654
2655 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2656 // Note that C identically-named things in different translation units are
2657 // not redeclarations, but may still have compatible types, where ODR-like
2658 // semantics may apply.
2659 if (!Reader.getContext().getLangOpts().CPlusPlus &&
2660 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2661 return;
2662
2663 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2664 if (T *Existing = ExistingRes)
2665 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2666 Existing->getCanonicalDecl());
2667}
2668
2669void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2670 Record.readOMPChildren(D->Data);
2671 VisitDecl(D);
2672}
2673
2674void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2675 Record.readOMPChildren(D->Data);
2676 VisitDecl(D);
2677}
2678
2679void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
2680 Record.readOMPChildren(D->Data);
2681 VisitDecl(D);
2682}
2683
2684void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2685 VisitValueDecl(D);
2686 D->setLocation(readSourceLocation());
2687 Expr *In = Record.readExpr();
2688 Expr *Out = Record.readExpr();
2689 D->setCombinerData(In, Out);
2690 Expr *Combiner = Record.readExpr();
2691 D->setCombiner(Combiner);
2692 Expr *Orig = Record.readExpr();
2693 Expr *Priv = Record.readExpr();
2694 D->setInitializerData(Orig, Priv);
2695 Expr *Init = Record.readExpr();
2696 auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2697 D->setInitializer(Init, IK);
2698 D->PrevDeclInScope = readDeclID();
2699}
2700
2701void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2702 Record.readOMPChildren(D->Data);
2703 VisitValueDecl(D);
2704 D->VarName = Record.readDeclarationName();
2705 D->PrevDeclInScope = readDeclID();
2706}
2707
2708void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2709 VisitVarDecl(D);
2710}
2711
2712//===----------------------------------------------------------------------===//
2713// Attribute Reading
2714//===----------------------------------------------------------------------===//
2715
2716namespace {
2717class AttrReader {
2718 ASTRecordReader &Reader;
2719
2720public:
2721 AttrReader(ASTRecordReader &Reader) : Reader(Reader) {}
2722
2723 uint64_t readInt() {
2724 return Reader.readInt();
2725 }
2726
2727 SourceRange readSourceRange() {
2728 return Reader.readSourceRange();
2729 }
2730
2731 SourceLocation readSourceLocation() {
2732 return Reader.readSourceLocation();
2733 }
2734
2735 Expr *readExpr() { return Reader.readExpr(); }
2736
2737 std::string readString() {
2738 return Reader.readString();
2739 }
2740
2741 TypeSourceInfo *readTypeSourceInfo() {
2742 return Reader.readTypeSourceInfo();
2743 }
2744
2745 IdentifierInfo *readIdentifier() {
2746 return Reader.readIdentifier();
2747 }
2748
2749 VersionTuple readVersionTuple() {
2750 return Reader.readVersionTuple();
2751 }
2752
2753 OMPTraitInfo *readOMPTraitInfo() { return Reader.readOMPTraitInfo(); }
2754
2755 template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2756 return Reader.GetLocalDeclAs<T>(LocalID);
2757 }
2758};
2759}
2760
2761Attr *ASTRecordReader::readAttr() {
2762 AttrReader Record(*this);
2763 auto V = Record.readInt();
2764 if (!V)
2765 return nullptr;
2766
2767 Attr *New = nullptr;
2768 // Kind is stored as a 1-based integer because 0 is used to indicate a null
2769 // Attr pointer.
2770 auto Kind = static_cast<attr::Kind>(V - 1);
2771 ASTContext &Context = getContext();
2772
2773 IdentifierInfo *AttrName = Record.readIdentifier();
2774 IdentifierInfo *ScopeName = Record.readIdentifier();
2775 SourceRange AttrRange = Record.readSourceRange();
2776 SourceLocation ScopeLoc = Record.readSourceLocation();
2777 unsigned ParsedKind = Record.readInt();
2778 unsigned Syntax = Record.readInt();
2779 unsigned SpellingIndex = Record.readInt();
2780
2781 AttributeCommonInfo Info(AttrName, ScopeName, AttrRange, ScopeLoc,
2782 AttributeCommonInfo::Kind(ParsedKind),
2783 AttributeCommonInfo::Syntax(Syntax), SpellingIndex);
2784
2785#include "clang/Serialization/AttrPCHRead.inc"
2786
2787 assert(New && "Unable to decode attribute?")((New && "Unable to decode attribute?") ? static_cast
<void> (0) : __assert_fail ("New && \"Unable to decode attribute?\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2787, __PRETTY_FUNCTION__))
;
2788 return New;
2789}
2790
2791/// Reads attributes from the current stream position.
2792void ASTRecordReader::readAttributes(AttrVec &Attrs) {
2793 for (unsigned I = 0, E = readInt(); I != E; ++I)
2794 Attrs.push_back(readAttr());
2795}
2796
2797//===----------------------------------------------------------------------===//
2798// ASTReader Implementation
2799//===----------------------------------------------------------------------===//
2800
2801/// Note that we have loaded the declaration with the given
2802/// Index.
2803///
2804/// This routine notes that this declaration has already been loaded,
2805/// so that future GetDecl calls will return this declaration rather
2806/// than trying to load a new declaration.
2807inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2808 assert(!DeclsLoaded[Index] && "Decl loaded twice?")((!DeclsLoaded[Index] && "Decl loaded twice?") ? static_cast
<void> (0) : __assert_fail ("!DeclsLoaded[Index] && \"Decl loaded twice?\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2808, __PRETTY_FUNCTION__))
;
2809 DeclsLoaded[Index] = D;
2810}
2811
2812/// Determine whether the consumer will be interested in seeing
2813/// this declaration (via HandleTopLevelDecl).
2814///
2815/// This routine should return true for anything that might affect
2816/// code generation, e.g., inline function definitions, Objective-C
2817/// declarations with metadata, etc.
2818static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2819 // An ObjCMethodDecl is never considered as "interesting" because its
2820 // implementation container always is.
2821
2822 // An ImportDecl or VarDecl imported from a module map module will get
2823 // emitted when we import the relevant module.
2824 if (isPartOfPerModuleInitializer(D)) {
2825 auto *M = D->getImportedOwningModule();
2826 if (M && M->Kind == Module::ModuleMapModule &&
2827 Ctx.DeclMustBeEmitted(D))
2828 return false;
2829 }
2830
2831 if (isa<FileScopeAsmDecl>(D) ||
2832 isa<ObjCProtocolDecl>(D) ||
2833 isa<ObjCImplDecl>(D) ||
2834 isa<ImportDecl>(D) ||
2835 isa<PragmaCommentDecl>(D) ||
2836 isa<PragmaDetectMismatchDecl>(D))
2837 return true;
2838 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2839 isa<OMPDeclareMapperDecl>(D) || isa<OMPAllocateDecl>(D) ||
2840 isa<OMPRequiresDecl>(D))
2841 return !D->getDeclContext()->isFunctionOrMethod();
2842 if (const auto *Var = dyn_cast<VarDecl>(D))
2843 return Var->isFileVarDecl() &&
2844 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2845 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2846 if (const auto *Func = dyn_cast<FunctionDecl>(D))
2847 return Func->doesThisDeclarationHaveABody() || HasBody;
2848
2849 if (auto *ES = D->getASTContext().getExternalSource())
2850 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2851 return true;
2852
2853 return false;
2854}
2855
2856/// Get the correct cursor and offset for loading a declaration.
2857ASTReader::RecordLocation
2858ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2859 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2860 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")((I != GlobalDeclMap.end() && "Corrupted global declaration map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2860, __PRETTY_FUNCTION__))
;
2861 ModuleFile *M = I->second;
2862 const DeclOffset &DOffs =
2863 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2864 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2865 return RecordLocation(M, DOffs.getBitOffset(M->DeclsBlockStartOffset));
2866}
2867
2868ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2869 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2870
2871 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map")((I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalBitOffsetsMap.end() && \"Corrupted global bit offsets map\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2871, __PRETTY_FUNCTION__))
;
2872 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2873}
2874
2875uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint64_t LocalOffset) {
2876 return LocalOffset + M.GlobalBitOffset;
2877}
2878
2879static bool isSameTemplateParameterList(const ASTContext &C,
2880 const TemplateParameterList *X,
2881 const TemplateParameterList *Y);
2882
2883/// Determine whether two template parameters are similar enough
2884/// that they may be used in declarations of the same template.
2885static bool isSameTemplateParameter(const NamedDecl *X,
2886 const NamedDecl *Y) {
2887 if (X->getKind() != Y->getKind())
2888 return false;
2889
2890 if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2891 const auto *TY = cast<TemplateTypeParmDecl>(Y);
2892 if (TX->isParameterPack() != TY->isParameterPack())
2893 return false;
2894 if (TX->hasTypeConstraint() != TY->hasTypeConstraint())
2895 return false;
2896 const TypeConstraint *TXTC = TX->getTypeConstraint();
2897 const TypeConstraint *TYTC = TY->getTypeConstraint();
2898 if (!TXTC != !TYTC)
2899 return false;
2900 if (TXTC && TYTC) {
2901 if (TXTC->getNamedConcept() != TYTC->getNamedConcept())
2902 return false;
2903 if (TXTC->hasExplicitTemplateArgs() != TYTC->hasExplicitTemplateArgs())
2904 return false;
2905 if (TXTC->hasExplicitTemplateArgs()) {
2906 const auto *TXTCArgs = TXTC->getTemplateArgsAsWritten();
2907 const auto *TYTCArgs = TYTC->getTemplateArgsAsWritten();
2908 if (TXTCArgs->NumTemplateArgs != TYTCArgs->NumTemplateArgs)
2909 return false;
2910 llvm::FoldingSetNodeID XID, YID;
2911 for (const auto &ArgLoc : TXTCArgs->arguments())
2912 ArgLoc.getArgument().Profile(XID, X->getASTContext());
2913 for (const auto &ArgLoc : TYTCArgs->arguments())
2914 ArgLoc.getArgument().Profile(YID, Y->getASTContext());
2915 if (XID != YID)
2916 return false;
2917 }
2918 }
2919 return true;
2920 }
2921
2922 if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2923 const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2924 return TX->isParameterPack() == TY->isParameterPack() &&
2925 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2926 }
2927
2928 const auto *TX = cast<TemplateTemplateParmDecl>(X);
2929 const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2930 return TX->isParameterPack() == TY->isParameterPack() &&
2931 isSameTemplateParameterList(TX->getASTContext(),
2932 TX->getTemplateParameters(),
2933 TY->getTemplateParameters());
2934}
2935
2936static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2937 if (auto *NS = X->getAsNamespace())
2938 return NS;
2939 if (auto *NAS = X->getAsNamespaceAlias())
2940 return NAS->getNamespace();
2941 return nullptr;
2942}
2943
2944static bool isSameQualifier(const NestedNameSpecifier *X,
2945 const NestedNameSpecifier *Y) {
2946 if (auto *NSX = getNamespace(X)) {
2947 auto *NSY = getNamespace(Y);
2948 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2949 return false;
2950 } else if (X->getKind() != Y->getKind())
2951 return false;
2952
2953 // FIXME: For namespaces and types, we're permitted to check that the entity
2954 // is named via the same tokens. We should probably do so.
2955 switch (X->getKind()) {
2956 case NestedNameSpecifier::Identifier:
2957 if (X->getAsIdentifier() != Y->getAsIdentifier())
2958 return false;
2959 break;
2960 case NestedNameSpecifier::Namespace:
2961 case NestedNameSpecifier::NamespaceAlias:
2962 // We've already checked that we named the same namespace.
2963 break;
2964 case NestedNameSpecifier::TypeSpec:
2965 case NestedNameSpecifier::TypeSpecWithTemplate:
2966 if (X->getAsType()->getCanonicalTypeInternal() !=
2967 Y->getAsType()->getCanonicalTypeInternal())
2968 return false;
2969 break;
2970 case NestedNameSpecifier::Global:
2971 case NestedNameSpecifier::Super:
2972 return true;
2973 }
2974
2975 // Recurse into earlier portion of NNS, if any.
2976 auto *PX = X->getPrefix();
2977 auto *PY = Y->getPrefix();
2978 if (PX && PY)
2979 return isSameQualifier(PX, PY);
2980 return !PX && !PY;
2981}
2982
2983/// Determine whether two template parameter lists are similar enough
2984/// that they may be used in declarations of the same template.
2985static bool isSameTemplateParameterList(const ASTContext &C,
2986 const TemplateParameterList *X,
2987 const TemplateParameterList *Y) {
2988 if (X->size() != Y->size())
2989 return false;
2990
2991 for (unsigned I = 0, N = X->size(); I != N; ++I)
2992 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2993 return false;
2994
2995 const Expr *XRC = X->getRequiresClause();
2996 const Expr *YRC = Y->getRequiresClause();
2997 if (!XRC != !YRC)
2998 return false;
2999 if (XRC) {
3000 llvm::FoldingSetNodeID XRCID, YRCID;
3001 XRC->Profile(XRCID, C, /*Canonical=*/true);
3002 YRC->Profile(YRCID, C, /*Canonical=*/true);
3003 if (XRCID != YRCID)
3004 return false;
3005 }
3006
3007 return true;
3008}
3009
3010/// Determine whether the attributes we can overload on are identical for A and
3011/// B. Will ignore any overloadable attrs represented in the type of A and B.
3012static bool hasSameOverloadableAttrs(const FunctionDecl *A,
3013 const FunctionDecl *B) {
3014 // Note that pass_object_size attributes are represented in the function's
3015 // ExtParameterInfo, so we don't need to check them here.
3016
3017 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
3018 auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
3019 auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
3020
3021 for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
3022 Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
3023 Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
3024
3025 // Return false if the number of enable_if attributes is different.
3026 if (!Cand1A || !Cand2A)
3027 return false;
3028
3029 Cand1ID.clear();
3030 Cand2ID.clear();
3031
3032 (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
3033 (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
3034
3035 // Return false if any of the enable_if expressions of A and B are
3036 // different.
3037 if (Cand1ID != Cand2ID)
3038 return false;
3039 }
3040 return true;
3041}
3042
3043/// Determine whether the two declarations refer to the same entity.pr
3044static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
3045 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!")((X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!"
) ? static_cast<void> (0) : __assert_fail ("X->getDeclName() == Y->getDeclName() && \"Declaration name mismatch!\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3045, __PRETTY_FUNCTION__))
;
3046
3047 if (X == Y)
3048 return true;
3049
3050 // Must be in the same context.
3051 //
3052 // Note that we can't use DeclContext::Equals here, because the DeclContexts
3053 // could be two different declarations of the same function. (We will fix the
3054 // semantic DC to refer to the primary definition after merging.)
3055 if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
3056 cast<Decl>(Y->getDeclContext()->getRedeclContext())))
3057 return false;
3058
3059 // Two typedefs refer to the same entity if they have the same underlying
3060 // type.
3061 if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
3062 if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
3063 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
3064 TypedefY->getUnderlyingType());
3065
3066 // Must have the same kind.
3067 if (X->getKind() != Y->getKind())
3068 return false;
3069
3070 // Objective-C classes and protocols with the same name always match.
3071 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
3072 return true;
3073
3074 if (isa<ClassTemplateSpecializationDecl>(X)) {
3075 // No need to handle these here: we merge them when adding them to the
3076 // template.
3077 return false;
3078 }
3079
3080 // Compatible tags match.
3081 if (const auto *TagX = dyn_cast<TagDecl>(X)) {
3082 const auto *TagY = cast<TagDecl>(Y);
3083 return (TagX->getTagKind() == TagY->getTagKind()) ||
3084 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
3085 TagX->getTagKind() == TTK_Interface) &&
3086 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
3087 TagY->getTagKind() == TTK_Interface));
3088 }
3089
3090 // Functions with the same type and linkage match.
3091 // FIXME: This needs to cope with merging of prototyped/non-prototyped
3092 // functions, etc.
3093 if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
3094 const auto *FuncY = cast<FunctionDecl>(Y);
3095 if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
3096 const auto *CtorY = cast<CXXConstructorDecl>(Y);
3097 if (CtorX->getInheritedConstructor() &&
3098 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
3099 CtorY->getInheritedConstructor().getConstructor()))
3100 return false;
3101 }
3102
3103 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3104 return false;
3105
3106 // Multiversioned functions with different feature strings are represented
3107 // as separate declarations.
3108 if (FuncX->isMultiVersion()) {
3109 const auto *TAX = FuncX->getAttr<TargetAttr>();
3110 const auto *TAY = FuncY->getAttr<TargetAttr>();
3111 assert(TAX && TAY && "Multiversion Function without target attribute")((TAX && TAY && "Multiversion Function without target attribute"
) ? static_cast<void> (0) : __assert_fail ("TAX && TAY && \"Multiversion Function without target attribute\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3111, __PRETTY_FUNCTION__))
;
3112
3113 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3114 return false;
3115 }
3116
3117 ASTContext &C = FuncX->getASTContext();
3118
3119 const Expr *XRC = FuncX->getTrailingRequiresClause();
3120 const Expr *YRC = FuncY->getTrailingRequiresClause();
3121 if (!XRC != !YRC)
3122 return false;
3123 if (XRC) {
3124 llvm::FoldingSetNodeID XRCID, YRCID;
3125 XRC->Profile(XRCID, C, /*Canonical=*/true);
3126 YRC->Profile(YRCID, C, /*Canonical=*/true);
3127 if (XRCID != YRCID)
3128 return false;
3129 }
3130
3131 auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3132 // Map to the first declaration that we've already merged into this one.
3133 // The TSI of redeclarations might not match (due to calling conventions
3134 // being inherited onto the type but not the TSI), but the TSI type of
3135 // the first declaration of the function should match across modules.
3136 FD = FD->getCanonicalDecl();
3137 return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3138 : FD->getType();
3139 };
3140 QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3141 if (!C.hasSameType(XT, YT)) {
3142 // We can get functions with different types on the redecl chain in C++17
3143 // if they have differing exception specifications and at least one of
3144 // the excpetion specs is unresolved.
3145 auto *XFPT = XT->getAs<FunctionProtoType>();
3146 auto *YFPT = YT->getAs<FunctionProtoType>();
3147 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3148 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3149 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
3150 C.hasSameFunctionTypeIgnoringExceptionSpec(XT, YT))
3151 return true;
3152 return false;
3153 }
3154
3155 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3156 hasSameOverloadableAttrs(FuncX, FuncY);
3157 }
3158
3159 // Variables with the same type and linkage match.
3160 if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3161 const auto *VarY = cast<VarDecl>(Y);
3162 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3163 ASTContext &C = VarX->getASTContext();
3164 if (C.hasSameType(VarX->getType(), VarY->getType()))
3165 return true;
3166
3167 // We can get decls with different types on the redecl chain. Eg.
3168 // template <typename T> struct S { static T Var[]; }; // #1
3169 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3170 // Only? happens when completing an incomplete array type. In this case
3171 // when comparing #1 and #2 we should go through their element type.
3172 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3173 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3174 if (!VarXTy || !VarYTy)
3175 return false;
3176 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3177 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3178 }
3179 return false;
3180 }
3181
3182 // Namespaces with the same name and inlinedness match.
3183 if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3184 const auto *NamespaceY = cast<NamespaceDecl>(Y);
3185 return NamespaceX->isInline() == NamespaceY->isInline();
3186 }
3187
3188 // Identical template names and kinds match if their template parameter lists
3189 // and patterns match.
3190 if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3191 const auto *TemplateY = cast<TemplateDecl>(Y);
3192 return isSameEntity(TemplateX->getTemplatedDecl(),
3193 TemplateY->getTemplatedDecl()) &&
3194 isSameTemplateParameterList(TemplateX->getASTContext(),
3195 TemplateX->getTemplateParameters(),
3196 TemplateY->getTemplateParameters());
3197 }
3198
3199 // Fields with the same name and the same type match.
3200 if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3201 const auto *FDY = cast<FieldDecl>(Y);
3202 // FIXME: Also check the bitwidth is odr-equivalent, if any.
3203 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3204 }
3205
3206 // Indirect fields with the same target field match.
3207 if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3208 const auto *IFDY = cast<IndirectFieldDecl>(Y);
3209 return IFDX->getAnonField()->getCanonicalDecl() ==
3210 IFDY->getAnonField()->getCanonicalDecl();
3211 }
3212
3213 // Enumerators with the same name match.
3214 if (isa<EnumConstantDecl>(X))
3215 // FIXME: Also check the value is odr-equivalent.
3216 return true;
3217
3218 // Using shadow declarations with the same target match.
3219 if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3220 const auto *USY = cast<UsingShadowDecl>(Y);
3221 return USX->getTargetDecl() == USY->getTargetDecl();
3222 }
3223
3224 // Using declarations with the same qualifier match. (We already know that
3225 // the name matches.)
3226 if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3227 const auto *UY = cast<UsingDecl>(Y);
3228 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3229 UX->hasTypename() == UY->hasTypename() &&
3230 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3231 }
3232 if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3233 const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3234 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3235 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3236 }
3237 if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3238 return isSameQualifier(
3239 UX->getQualifier(),
3240 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3241
3242 // Namespace alias definitions with the same target match.
3243 if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3244 const auto *NAY = cast<NamespaceAliasDecl>(Y);
3245 return NAX->getNamespace()->Equals(NAY->getNamespace());
3246 }
3247
3248 return false;
3249}
3250
3251/// Find the context in which we should search for previous declarations when
3252/// looking for declarations to merge.
3253DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3254 DeclContext *DC) {
3255 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3256 return ND->getOriginalNamespace();
3257
3258 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3259 // Try to dig out the definition.
3260 auto *DD = RD->DefinitionData;
3261 if (!DD)
3262 DD = RD->getCanonicalDecl()->DefinitionData;
3263
3264 // If there's no definition yet, then DC's definition is added by an update
3265 // record, but we've not yet loaded that update record. In this case, we
3266 // commit to DC being the canonical definition now, and will fix this when
3267 // we load the update record.
3268 if (!DD) {
3269 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3270 RD->setCompleteDefinition(true);
3271 RD->DefinitionData = DD;
3272 RD->getCanonicalDecl()->DefinitionData = DD;
3273
3274 // Track that we did this horrible thing so that we can fix it later.
3275 Reader.PendingFakeDefinitionData.insert(
3276 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3277 }
3278
3279 return DD->Definition;
3280 }
3281
3282 if (auto *ED = dyn_cast<EnumDecl>(DC))
3283 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3284 : nullptr;
3285
3286 // We can see the TU here only if we have no Sema object. In that case,
3287 // there's no TU scope to look in, so using the DC alone is sufficient.
3288 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3289 return TU;
3290
3291 return nullptr;
3292}
3293
3294ASTDeclReader::FindExistingResult::~FindExistingResult() {
3295 // Record that we had a typedef name for linkage whether or not we merge
3296 // with that declaration.
3297 if (TypedefNameForLinkage) {
3298 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3299 Reader.ImportedTypedefNamesForLinkage.insert(
3300 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3301 return;
3302 }
3303
3304 if (!AddResult || Existing)
3305 return;
3306
3307 DeclarationName Name = New->getDeclName();
3308 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3309 if (needsAnonymousDeclarationNumber(New)) {
3310 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3311 AnonymousDeclNumber, New);
3312 } else if (DC->isTranslationUnit() &&
3313 !Reader.getContext().getLangOpts().CPlusPlus) {
3314 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3315 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3316 .push_back(New);
3317 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3318 // Add the declaration to its redeclaration context so later merging
3319 // lookups will find it.
3320 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3321 }
3322}
3323
3324/// Find the declaration that should be merged into, given the declaration found
3325/// by name lookup. If we're merging an anonymous declaration within a typedef,
3326/// we need a matching typedef, and we merge with the type inside it.
3327static NamedDecl *getDeclForMerging(NamedDecl *Found,
3328 bool IsTypedefNameForLinkage) {
3329 if (!IsTypedefNameForLinkage)
3330 return Found;
3331
3332 // If we found a typedef declaration that gives a name to some other
3333 // declaration, then we want that inner declaration. Declarations from
3334 // AST files are handled via ImportedTypedefNamesForLinkage.
3335 if (Found->isFromASTFile())
3336 return nullptr;
3337
3338 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3339 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3340
3341 return nullptr;
3342}
3343
3344/// Find the declaration to use to populate the anonymous declaration table
3345/// for the given lexical DeclContext. We only care about finding local
3346/// definitions of the context; we'll merge imported ones as we go.
3347DeclContext *
3348ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3349 // For classes, we track the definition as we merge.
3350 if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3351 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3352 return DD ? DD->Definition : nullptr;
3353 }
3354
3355 // For anything else, walk its merged redeclarations looking for a definition.
3356 // Note that we can't just call getDefinition here because the redeclaration
3357 // chain isn't wired up.
3358 for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3359 if (auto *FD = dyn_cast<FunctionDecl>(D))
3360 if (FD->isThisDeclarationADefinition())
3361 return FD;
3362 if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3363 if (MD->isThisDeclarationADefinition())
3364 return MD;
3365 }
3366
3367 // No merged definition yet.
3368 return nullptr;
3369}
3370
3371NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3372 DeclContext *DC,
3373 unsigned Index) {
3374 // If the lexical context has been merged, look into the now-canonical
3375 // definition.
3376 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3377
3378 // If we've seen this before, return the canonical declaration.
3379 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3380 if (Index < Previous.size() && Previous[Index])
3381 return Previous[Index];
3382
3383 // If this is the first time, but we have parsed a declaration of the context,
3384 // build the anonymous declaration list from the parsed declaration.
3385 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3386 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3387 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3388 if (Previous.size() == Number)
3389 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3390 else
3391 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3392 });
3393 }
3394
3395 return Index < Previous.size() ? Previous[Index] : nullptr;
3396}
3397
3398void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3399 DeclContext *DC, unsigned Index,
3400 NamedDecl *D) {
3401 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3402
3403 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3404 if (Index >= Previous.size())
3405 Previous.resize(Index + 1);
3406 if (!Previous[Index])
3407 Previous[Index] = D;
3408}
3409
3410ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3411 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3412 : D->getDeclName();
3413
3414 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3415 // Don't bother trying to find unnamed declarations that are in
3416 // unmergeable contexts.
3417 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3418 AnonymousDeclNumber, TypedefNameForLinkage);
3419 Result.suppress();
3420 return Result;
3421 }
3422
3423 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3424 if (TypedefNameForLinkage) {
3425 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3426 std::make_pair(DC, TypedefNameForLinkage));
3427 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3428 if (isSameEntity(It->second, D))
3429 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3430 TypedefNameForLinkage);
3431 // Go on to check in other places in case an existing typedef name
3432 // was not imported.
3433 }
3434
3435 if (needsAnonymousDeclarationNumber(D)) {
3436 // This is an anonymous declaration that we may need to merge. Look it up
3437 // in its context by number.
3438 if (auto *Existing = getAnonymousDeclForMerging(
3439 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3440 if (isSameEntity(Existing, D))
3441 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3442 TypedefNameForLinkage);
3443 } else if (DC->isTranslationUnit() &&
3444 !Reader.getContext().getLangOpts().CPlusPlus) {
3445 IdentifierResolver &IdResolver = Reader.getIdResolver();
3446
3447 // Temporarily consider the identifier to be up-to-date. We don't want to
3448 // cause additional lookups here.
3449 class UpToDateIdentifierRAII {
3450 IdentifierInfo *II;
3451 bool WasOutToDate = false;
3452
3453 public:
3454 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3455 if (II) {
3456 WasOutToDate = II->isOutOfDate();
3457 if (WasOutToDate)
3458 II->setOutOfDate(false);
3459 }
3460 }
3461
3462 ~UpToDateIdentifierRAII() {
3463 if (WasOutToDate)
3464 II->setOutOfDate(true);
3465 }
3466 } UpToDate(Name.getAsIdentifierInfo());
3467
3468 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3469 IEnd = IdResolver.end();
3470 I != IEnd; ++I) {
3471 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3472 if (isSameEntity(Existing, D))
3473 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3474 TypedefNameForLinkage);
3475 }
3476 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3477 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3478 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3479 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3480 if (isSameEntity(Existing, D))
3481 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3482 TypedefNameForLinkage);
3483 }
3484 } else {
3485 // Not in a mergeable context.
3486 return FindExistingResult(Reader);
3487 }
3488
3489 // If this declaration is from a merged context, make a note that we need to
3490 // check that the canonical definition of that context contains the decl.
3491 //
3492 // FIXME: We should do something similar if we merge two definitions of the
3493 // same template specialization into the same CXXRecordDecl.
3494 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3495 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3496 MergedDCIt->second == D->getDeclContext())
3497 Reader.PendingOdrMergeChecks.push_back(D);
3498
3499 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3500 AnonymousDeclNumber, TypedefNameForLinkage);
3501}
3502
3503template<typename DeclT>
3504Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3505 return D->RedeclLink.getLatestNotUpdated();
3506}
3507
3508Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3509 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3509)
;
3510}
3511
3512Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3513 assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3513, __PRETTY_FUNCTION__))
;
3514
3515 switch (D->getKind()) {
3516#define ABSTRACT_DECL(TYPE)
3517#define DECL(TYPE, BASE) \
3518 case Decl::TYPE: \
3519 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3520#include "clang/AST/DeclNodes.inc"
3521 }
3522 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3522)
;
3523}
3524
3525Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3526 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3527}
3528
3529void ASTDeclReader::mergeInheritableAttributes(ASTReader &Reader, Decl *D,
3530 Decl *Previous) {
3531 InheritableAttr *NewAttr = nullptr;
3532 ASTContext &Context = Reader.getContext();
3533 const auto *IA = Previous->getAttr<MSInheritanceAttr>();
3534
3535 if (IA && !D->hasAttr<MSInheritanceAttr>()) {
3536 NewAttr = cast<InheritableAttr>(IA->clone(Context));
3537 NewAttr->setInherited(true);
3538 D->addAttr(NewAttr);
3539 }
3540}
3541
3542template<typename DeclT>
3543void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3544 Redeclarable<DeclT> *D,
3545 Decl *Previous, Decl *Canon) {
3546 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3547 D->First = cast<DeclT>(Previous)->First;
3548}
3549
3550namespace clang {
3551
3552template<>
3553void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3554 Redeclarable<VarDecl> *D,
3555 Decl *Previous, Decl *Canon) {
3556 auto *VD = static_cast<VarDecl *>(D);
3557 auto *PrevVD = cast<VarDecl>(Previous);
3558 D->RedeclLink.setPrevious(PrevVD);
3559 D->First = PrevVD->First;
3560
3561 // We should keep at most one definition on the chain.
3562 // FIXME: Cache the definition once we've found it. Building a chain with
3563 // N definitions currently takes O(N^2) time here.
3564 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3565 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3566 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3567 Reader.mergeDefinitionVisibility(CurD, VD);
3568 VD->demoteThisDefinitionToDeclaration();
3569 break;
3570 }
3571 }
3572 }
3573}
3574
3575static bool isUndeducedReturnType(QualType T) {
3576 auto *DT = T->getContainedDeducedType();
3577 return DT && !DT->isDeduced();
3578}
3579
3580template<>
3581void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3582 Redeclarable<FunctionDecl> *D,
3583 Decl *Previous, Decl *Canon) {
3584 auto *FD = static_cast<FunctionDecl *>(D);
3585 auto *PrevFD = cast<FunctionDecl>(Previous);
3586
3587 FD->RedeclLink.setPrevious(PrevFD);
3588 FD->First = PrevFD->First;
3589
3590 // If the previous declaration is an inline function declaration, then this
3591 // declaration is too.
3592 if (PrevFD->isInlined() != FD->isInlined()) {
3593 // FIXME: [dcl.fct.spec]p4:
3594 // If a function with external linkage is declared inline in one
3595 // translation unit, it shall be declared inline in all translation
3596 // units in which it appears.
3597 //
3598 // Be careful of this case:
3599 //
3600 // module A:
3601 // template<typename T> struct X { void f(); };
3602 // template<typename T> inline void X<T>::f() {}
3603 //
3604 // module B instantiates the declaration of X<int>::f
3605 // module C instantiates the definition of X<int>::f
3606 //
3607 // If module B and C are merged, we do not have a violation of this rule.
3608 FD->setImplicitlyInline(true);
3609 }
3610
3611 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3612 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3613 if (FPT && PrevFPT) {
3614 // If we need to propagate an exception specification along the redecl
3615 // chain, make a note of that so that we can do so later.
3616 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3617 bool WasUnresolved =
3618 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3619 if (IsUnresolved != WasUnresolved)
3620 Reader.PendingExceptionSpecUpdates.insert(
3621 {Canon, IsUnresolved ? PrevFD : FD});
3622
3623 // If we need to propagate a deduced return type along the redecl chain,
3624 // make a note of that so that we can do it later.
3625 bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3626 bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3627 if (IsUndeduced != WasUndeduced)
3628 Reader.PendingDeducedTypeUpdates.insert(
3629 {cast<FunctionDecl>(Canon),
3630 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3631 }
3632}
3633
3634} // namespace clang
3635
3636void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3637 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3637)
;
3638}
3639
3640/// Inherit the default template argument from \p From to \p To. Returns
3641/// \c false if there is no default template for \p From.
3642template <typename ParmDecl>
3643static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3644 Decl *ToD) {
3645 auto *To = cast<ParmDecl>(ToD);
3646 if (!From->hasDefaultArgument())
3647 return false;
3648 To->setInheritedDefaultArgument(Context, From);
3649 return true;
3650}
3651
3652static void inheritDefaultTemplateArguments(ASTContext &Context,
3653 TemplateDecl *From,
3654 TemplateDecl *To) {
3655 auto *FromTP = From->getTemplateParameters();
3656 auto *ToTP = To->getTemplateParameters();
3657 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?")((FromTP->size() == ToTP->size() && "merged mismatched templates?"
) ? static_cast<void> (0) : __assert_fail ("FromTP->size() == ToTP->size() && \"merged mismatched templates?\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3657, __PRETTY_FUNCTION__))
;
3658
3659 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3660 NamedDecl *FromParam = FromTP->getParam(I);
3661 NamedDecl *ToParam = ToTP->getParam(I);
3662
3663 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3664 inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3665 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3666 inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3667 else
3668 inheritDefaultTemplateArgument(
3669 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3670 }
3671}
3672
3673void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3674 Decl *Previous, Decl *Canon) {
3675 assert(D && Previous)((D && Previous) ? static_cast<void> (0) : __assert_fail
("D && Previous", "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3675, __PRETTY_FUNCTION__))
;
3676
3677 switch (D->getKind()) {
3678#define ABSTRACT_DECL(TYPE)
3679#define DECL(TYPE, BASE) \
3680 case Decl::TYPE: \
3681 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3682 break;
3683#include "clang/AST/DeclNodes.inc"
3684 }
3685
3686 // If the declaration was visible in one module, a redeclaration of it in
3687 // another module remains visible even if it wouldn't be visible by itself.
3688 //
3689 // FIXME: In this case, the declaration should only be visible if a module
3690 // that makes it visible has been imported.
3691 D->IdentifierNamespace |=
3692 Previous->IdentifierNamespace &
3693 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3694
3695 // If the declaration declares a template, it may inherit default arguments
3696 // from the previous declaration.
3697 if (auto *TD = dyn_cast<TemplateDecl>(D))
3698 inheritDefaultTemplateArguments(Reader.getContext(),
3699 cast<TemplateDecl>(Previous), TD);
3700
3701 // If any of the declaration in the chain contains an Inheritable attribute,
3702 // it needs to be added to all the declarations in the redeclarable chain.
3703 // FIXME: Only the logic of merging MSInheritableAttr is present, it should
3704 // be extended for all inheritable attributes.
3705 mergeInheritableAttributes(Reader, D, Previous);
3706}
3707
3708template<typename DeclT>
3709void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3710 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3711}
3712
3713void ASTDeclReader::attachLatestDeclImpl(...) {
3714 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3714)
;
3715}
3716
3717void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3718 assert(D && Latest)((D && Latest) ? static_cast<void> (0) : __assert_fail
("D && Latest", "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3718, __PRETTY_FUNCTION__))
;
3719
3720 switch (D->getKind()) {
3721#define ABSTRACT_DECL(TYPE)
3722#define DECL(TYPE, BASE) \
3723 case Decl::TYPE: \
3724 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3725 break;
3726#include "clang/AST/DeclNodes.inc"
3727 }
3728}
3729
3730template<typename DeclT>
3731void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3732 D->RedeclLink.markIncomplete();
3733}
3734
3735void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3736 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3736)
;
3737}
3738
3739void ASTReader::markIncompleteDeclChain(Decl *D) {
3740 switch (D->getKind()) {
3741#define ABSTRACT_DECL(TYPE)
3742#define DECL(TYPE, BASE) \
3743 case Decl::TYPE: \
3744 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3745 break;
3746#include "clang/AST/DeclNodes.inc"
3747 }
3748}
3749
3750/// Read the declaration at the given offset from the AST file.
3751Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3752 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3753 SourceLocation DeclLoc;
3754 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3755 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3756 // Keep track of where we are in the stream, then jump back there
3757 // after reading this declaration.
3758 SavedStreamPosition SavedPosition(DeclsCursor);
3759
3760 ReadingKindTracker ReadingKind(Read_Decl, *this);
3761
3762 // Note that we are loading a declaration record.
3763 Deserializing ADecl(this);
3764
3765 auto Fail = [](const char *what, llvm::Error &&Err) {
3766 llvm::report_fatal_error(Twine("ASTReader::readDeclRecord failed ") + what +
3767 ": " + toString(std::move(Err)));
3768 };
3769
3770 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(Loc.Offset))
3771 Fail("jumping", std::move(JumpFailed));
3772 ASTRecordReader Record(*this, *Loc.F);
3773 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3774 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3775 if (!MaybeCode)
3776 Fail("reading code", MaybeCode.takeError());
3777 unsigned Code = MaybeCode.get();
3778
3779 ASTContext &Context = getContext();
3780 Decl *D = nullptr;
3781 Expected<unsigned> MaybeDeclCode = Record.readRecord(DeclsCursor, Code);
3782 if (!MaybeDeclCode)
3783 llvm::report_fatal_error(
3784 "ASTReader::readDeclRecord failed reading decl code: " +
3785 toString(MaybeDeclCode.takeError()));
3786 switch ((DeclCode)MaybeDeclCode.get()) {
3787 case DECL_CONTEXT_LEXICAL:
3788 case DECL_CONTEXT_VISIBLE:
3789 llvm_unreachable("Record cannot be de-serialized with readDeclRecord")::llvm::llvm_unreachable_internal("Record cannot be de-serialized with readDeclRecord"
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3789)
;
3790 case DECL_TYPEDEF:
3791 D = TypedefDecl::CreateDeserialized(Context, ID);
3792 break;
3793 case DECL_TYPEALIAS:
3794 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3795 break;
3796 case DECL_ENUM:
3797 D = EnumDecl::CreateDeserialized(Context, ID);
3798 break;
3799 case DECL_RECORD:
3800 D = RecordDecl::CreateDeserialized(Context, ID);
3801 break;
3802 case DECL_ENUM_CONSTANT:
3803 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3804 break;
3805 case DECL_FUNCTION:
3806 D = FunctionDecl::CreateDeserialized(Context, ID);
3807 break;
3808 case DECL_LINKAGE_SPEC:
3809 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3810 break;
3811 case DECL_EXPORT:
3812 D = ExportDecl::CreateDeserialized(Context, ID);
3813 break;
3814 case DECL_LABEL:
3815 D = LabelDecl::CreateDeserialized(Context, ID);
3816 break;
3817 case DECL_NAMESPACE:
3818 D = NamespaceDecl::CreateDeserialized(Context, ID);
3819 break;
3820 case DECL_NAMESPACE_ALIAS:
3821 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3822 break;
3823 case DECL_USING:
3824 D = UsingDecl::CreateDeserialized(Context, ID);
3825 break;
3826 case DECL_USING_PACK:
3827 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3828 break;
3829 case DECL_USING_SHADOW:
3830 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3831 break;
3832 case DECL_CONSTRUCTOR_USING_SHADOW:
3833 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3834 break;
3835 case DECL_USING_DIRECTIVE:
3836 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3837 break;
3838 case DECL_UNRESOLVED_USING_VALUE:
3839 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3840 break;
3841 case DECL_UNRESOLVED_USING_TYPENAME:
3842 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3843 break;
3844 case DECL_CXX_RECORD:
3845 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3846 break;
3847 case DECL_CXX_DEDUCTION_GUIDE:
3848 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3849 break;
3850 case DECL_CXX_METHOD:
3851 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3852 break;
3853 case DECL_CXX_CONSTRUCTOR:
3854 D = CXXConstructorDecl::CreateDeserialized(Context, ID, Record.readInt());
3855 break;
3856 case DECL_CXX_DESTRUCTOR:
3857 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3858 break;
3859 case DECL_CXX_CONVERSION:
3860 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3861 break;
3862 case DECL_ACCESS_SPEC:
3863 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3864 break;
3865 case DECL_FRIEND:
3866 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3867 break;
3868 case DECL_FRIEND_TEMPLATE:
3869 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3870 break;
3871 case DECL_CLASS_TEMPLATE:
3872 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3873 break;
3874 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3875 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3876 break;
3877 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3878 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3879 break;
3880 case DECL_VAR_TEMPLATE:
3881 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3882 break;
3883 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3884 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3885 break;
3886 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3887 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3888 break;
3889 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3890 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3891 break;
3892 case DECL_FUNCTION_TEMPLATE:
3893 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3894 break;
3895 case DECL_TEMPLATE_TYPE_PARM: {
3896 bool HasTypeConstraint = Record.readInt();
3897 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID,
3898 HasTypeConstraint);
3899 break;
3900 }
3901 case DECL_NON_TYPE_TEMPLATE_PARM: {
3902 bool HasTypeConstraint = Record.readInt();
3903 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3904 HasTypeConstraint);
3905 break;
3906 }
3907 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK: {
3908 bool HasTypeConstraint = Record.readInt();
3909 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3910 Record.readInt(),
3911 HasTypeConstraint);
3912 break;
3913 }
3914 case DECL_TEMPLATE_TEMPLATE_PARM:
3915 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3916 break;
3917 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3918 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3919 Record.readInt());
3920 break;
3921 case DECL_TYPE_ALIAS_TEMPLATE:
3922 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3923 break;
3924 case DECL_CONCEPT:
3925 D = ConceptDecl::CreateDeserialized(Context, ID);
3926 break;
3927 case DECL_REQUIRES_EXPR_BODY:
3928 D = RequiresExprBodyDecl::CreateDeserialized(Context, ID);
3929 break;
3930 case DECL_STATIC_ASSERT:
3931 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3932 break;
3933 case DECL_OBJC_METHOD:
3934 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3935 break;
3936 case DECL_OBJC_INTERFACE:
3937 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3938 break;
3939 case DECL_OBJC_IVAR:
3940 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3941 break;
3942 case DECL_OBJC_PROTOCOL:
3943 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3944 break;
3945 case DECL_OBJC_AT_DEFS_FIELD:
3946 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3947 break;
3948 case DECL_OBJC_CATEGORY:
3949 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3950 break;
3951 case DECL_OBJC_CATEGORY_IMPL:
3952 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3953 break;
3954 case DECL_OBJC_IMPLEMENTATION:
3955 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3956 break;
3957 case DECL_OBJC_COMPATIBLE_ALIAS:
3958 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3959 break;
3960 case DECL_OBJC_PROPERTY:
3961 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3962 break;
3963 case DECL_OBJC_PROPERTY_IMPL:
3964 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3965 break;
3966 case DECL_FIELD:
3967 D = FieldDecl::CreateDeserialized(Context, ID);
3968 break;
3969 case DECL_INDIRECTFIELD:
3970 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3971 break;
3972 case DECL_VAR:
3973 D = VarDecl::CreateDeserialized(Context, ID);
3974 break;
3975 case DECL_IMPLICIT_PARAM:
3976 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3977 break;
3978 case DECL_PARM_VAR:
3979 D = ParmVarDecl::CreateDeserialized(Context, ID);
3980 break;
3981 case DECL_DECOMPOSITION:
3982 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3983 break;
3984 case DECL_BINDING:
3985 D = BindingDecl::CreateDeserialized(Context, ID);
3986 break;
3987 case DECL_FILE_SCOPE_ASM:
3988 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3989 break;
3990 case DECL_BLOCK:
3991 D = BlockDecl::CreateDeserialized(Context, ID);
3992 break;
3993 case DECL_MS_PROPERTY:
3994 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3995 break;
3996 case DECL_MS_GUID:
3997 D = MSGuidDecl::CreateDeserialized(Context, ID);
3998 break;
3999 case DECL_TEMPLATE_PARAM_OBJECT:
4000 D = TemplateParamObjectDecl::CreateDeserialized(Context, ID);
4001 break;
4002 case DECL_CAPTURED:
4003 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
4004 break;
4005 case DECL_CXX_BASE_SPECIFIERS:
4006 Error("attempt to read a C++ base-specifier record as a declaration");
4007 return nullptr;
4008 case DECL_CXX_CTOR_INITIALIZERS:
4009 Error("attempt to read a C++ ctor initializer record as a declaration");
4010 return nullptr;
4011 case DECL_IMPORT:
4012 // Note: last entry of the ImportDecl record is the number of stored source
4013 // locations.
4014 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
4015 break;
4016 case DECL_OMP_THREADPRIVATE: {
4017 Record.skipInts(1);
4018 unsigned NumChildren = Record.readInt();
4019 Record.skipInts(1);
4020 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, NumChildren);
4021 break;
4022 }
4023 case DECL_OMP_ALLOCATE: {
4024 unsigned NumClauses = Record.readInt();
4025 unsigned NumVars = Record.readInt();
4026 Record.skipInts(1);
4027 D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
4028 break;
4029 }
4030 case DECL_OMP_REQUIRES: {
4031 unsigned NumClauses = Record.readInt();
4032 Record.skipInts(2);
4033 D = OMPRequiresDecl::CreateDeserialized(Context, ID, NumClauses);
4034 break;
4035 }
4036 case DECL_OMP_DECLARE_REDUCTION:
4037 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
4038 break;
4039 case DECL_OMP_DECLARE_MAPPER: {
4040 unsigned NumClauses = Record.readInt();
4041 Record.skipInts(2);
4042 D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, NumClauses);
4043 break;
4044 }
4045 case DECL_OMP_CAPTUREDEXPR:
4046 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
4047 break;
4048 case DECL_PRAGMA_COMMENT:
4049 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
4050 break;
4051 case DECL_PRAGMA_DETECT_MISMATCH:
4052 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
4053 Record.readInt());
4054 break;
4055 case DECL_EMPTY:
4056 D = EmptyDecl::CreateDeserialized(Context, ID);
4057 break;
4058 case DECL_LIFETIME_EXTENDED_TEMPORARY:
4059 D = LifetimeExtendedTemporaryDecl::CreateDeserialized(Context, ID);
4060 break;
4061 case DECL_OBJC_TYPE_PARAM:
4062 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
4063 break;
4064 }
4065
4066 assert(D && "Unknown declaration reading AST file")((D && "Unknown declaration reading AST file") ? static_cast
<void> (0) : __assert_fail ("D && \"Unknown declaration reading AST file\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4066, __PRETTY_FUNCTION__))
;
4067 LoadedDecl(Index, D);
4068 // Set the DeclContext before doing any deserialization, to make sure internal
4069 // calls to Decl::getASTContext() by Decl's methods will find the
4070 // TranslationUnitDecl without crashing.
4071 D->setDeclContext(Context.getTranslationUnitDecl());
4072 Reader.Visit(D);
4073
4074 // If this declaration is also a declaration context, get the
4075 // offsets for its tables of lexical and visible declarations.
4076 if (auto *DC = dyn_cast<DeclContext>(D)) {
4077 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
4078 if (Offsets.first &&
4079 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
4080 return nullptr;
4081 if (Offsets.second &&
4082 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
4083 return nullptr;
4084 }
4085 assert(Record.getIdx() == Record.size())((Record.getIdx() == Record.size()) ? static_cast<void>
(0) : __assert_fail ("Record.getIdx() == Record.size()", "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4085, __PRETTY_FUNCTION__))
;
4086
4087 // Load any relevant update records.
4088 PendingUpdateRecords.push_back(
4089 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
4090
4091 // Load the categories after recursive loading is finished.
4092 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
4093 // If we already have a definition when deserializing the ObjCInterfaceDecl,
4094 // we put the Decl in PendingDefinitions so we can pull the categories here.
4095 if (Class->isThisDeclarationADefinition() ||
4096 PendingDefinitions.count(Class))
4097 loadObjCCategories(ID, Class);
4098
4099 // If we have deserialized a declaration that has a definition the
4100 // AST consumer might need to know about, queue it.
4101 // We don't pass it to the consumer immediately because we may be in recursive
4102 // loading, and some declarations may still be initializing.
4103 PotentiallyInterestingDecls.push_back(
4104 InterestingDecl(D, Reader.hasPendingBody()));
4105
4106 return D;
4107}
4108
4109void ASTReader::PassInterestingDeclsToConsumer() {
4110 assert(Consumer)((Consumer) ? static_cast<void> (0) : __assert_fail ("Consumer"
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4110, __PRETTY_FUNCTION__))
;
4111
4112 if (PassingDeclsToConsumer)
4113 return;
4114
4115 // Guard variable to avoid recursively redoing the process of passing
4116 // decls to consumer.
4117 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
4118 true);
4119
4120 // Ensure that we've loaded all potentially-interesting declarations
4121 // that need to be eagerly loaded.
4122 for (auto ID : EagerlyDeserializedDecls)
4123 GetDecl(ID);
4124 EagerlyDeserializedDecls.clear();
4125
4126 while (!PotentiallyInterestingDecls.empty()) {
4127 InterestingDecl D = PotentiallyInterestingDecls.front();
4128 PotentiallyInterestingDecls.pop_front();
4129 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
4130 PassInterestingDeclToConsumer(D.getDecl());
4131 }
4132}
4133
4134void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4135 // The declaration may have been modified by files later in the chain.
4136 // If this is the case, read the record containing the updates from each file
4137 // and pass it to ASTDeclReader to make the modifications.
4138 serialization::GlobalDeclID ID = Record.ID;
4139 Decl *D = Record.D;
4140 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4141 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
4142
4143 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
4144
4145 if (UpdI != DeclUpdateOffsets.end()) {
4146 auto UpdateOffsets = std::move(UpdI->second);
4147 DeclUpdateOffsets.erase(UpdI);
4148
4149 // Check if this decl was interesting to the consumer. If we just loaded
4150 // the declaration, then we know it was interesting and we skip the call
4151 // to isConsumerInterestedIn because it is unsafe to call in the
4152 // current ASTReader state.
4153 bool WasInteresting =
4154 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
4155 for (auto &FileAndOffset : UpdateOffsets) {
4156 ModuleFile *F = FileAndOffset.first;
4157 uint64_t Offset = FileAndOffset.second;
4158 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4159 SavedStreamPosition SavedPosition(Cursor);
4160 if (llvm::Error JumpFailed = Cursor.JumpToBit(Offset))
4161 // FIXME don't do a fatal error.
4162 llvm::report_fatal_error(
4163 "ASTReader::loadDeclUpdateRecords failed jumping: " +
4164 toString(std::move(JumpFailed)));
4165 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4166 if (!MaybeCode)
4167 llvm::report_fatal_error(
4168 "ASTReader::loadDeclUpdateRecords failed reading code: " +
4169 toString(MaybeCode.takeError()));
4170 unsigned Code = MaybeCode.get();
4171 ASTRecordReader Record(*this, *F);
4172 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, Code))
4173 assert(MaybeRecCode.get() == DECL_UPDATES &&((MaybeRecCode.get() == DECL_UPDATES && "Expected DECL_UPDATES record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4174, __PRETTY_FUNCTION__))
4174 "Expected DECL_UPDATES record!")((MaybeRecCode.get() == DECL_UPDATES && "Expected DECL_UPDATES record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4174, __PRETTY_FUNCTION__))
;
4175 else
4176 llvm::report_fatal_error(
4177 "ASTReader::loadDeclUpdateRecords failed reading rec code: " +
4178 toString(MaybeCode.takeError()));
4179
4180 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4181 SourceLocation());
4182 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4183
4184 // We might have made this declaration interesting. If so, remember that
4185 // we need to hand it off to the consumer.
4186 if (!WasInteresting &&
4187 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4188 PotentiallyInterestingDecls.push_back(
4189 InterestingDecl(D, Reader.hasPendingBody()));
4190 WasInteresting = true;
4191 }
4192 }
4193 }
4194 // Add the lazy specializations to the template.
4195 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||(((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl
>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl
>(D)) && "Must not have pending specializations") ?
static_cast<void> (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4197, __PRETTY_FUNCTION__))
4196 isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&(((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl
>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl
>(D)) && "Must not have pending specializations") ?
static_cast<void> (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4197, __PRETTY_FUNCTION__))
4197 "Must not have pending specializations")(((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl
>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl
>(D)) && "Must not have pending specializations") ?
static_cast<void> (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4197, __PRETTY_FUNCTION__))
;
4198 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4199 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4200 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4201 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4202 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4203 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4204 PendingLazySpecializationIDs.clear();
4205
4206 // Load the pending visible updates for this decl context, if it has any.
4207 auto I = PendingVisibleUpdates.find(ID);
4208 if (I != PendingVisibleUpdates.end()) {
4209 auto VisibleUpdates = std::move(I->second);
4210 PendingVisibleUpdates.erase(I);
4211
4212 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4213 for (const auto &Update : VisibleUpdates)
4214 Lookups[DC].Table.add(
4215 Update.Mod, Update.Data,
4216 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4217 DC->setHasExternalVisibleStorage(true);
4218 }
4219}
4220
4221void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4222 // Attach FirstLocal to the end of the decl chain.
4223 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4224 if (FirstLocal != CanonDecl) {
4225 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4226 ASTDeclReader::attachPreviousDecl(
4227 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4228 CanonDecl);
4229 }
4230
4231 if (!LocalOffset) {
4232 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4233 return;
4234 }
4235
4236 // Load the list of other redeclarations from this module file.
4237 ModuleFile *M = getOwningModuleFile(FirstLocal);
4238 assert(M && "imported decl from no module file")((M && "imported decl from no module file") ? static_cast
<void> (0) : __assert_fail ("M && \"imported decl from no module file\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4238, __PRETTY_FUNCTION__))
;
4239
4240 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4241 SavedStreamPosition SavedPosition(Cursor);
4242 if (llvm::Error JumpFailed = Cursor.JumpToBit(LocalOffset))
4243 llvm::report_fatal_error(
4244 "ASTReader::loadPendingDeclChain failed jumping: " +
4245 toString(std::move(JumpFailed)));
4246
4247 RecordData Record;
4248 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4249 if (!MaybeCode)
4250 llvm::report_fatal_error(
4251 "ASTReader::loadPendingDeclChain failed reading code: " +
4252 toString(MaybeCode.takeError()));
4253 unsigned Code = MaybeCode.get();
4254 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record))
4255 assert(MaybeRecCode.get() == LOCAL_REDECLARATIONS &&((MaybeRecCode.get() == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4256, __PRETTY_FUNCTION__))
4256 "expected LOCAL_REDECLARATIONS record!")((MaybeRecCode.get() == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4256, __PRETTY_FUNCTION__))
;
4257 else
4258 llvm::report_fatal_error(
4259 "ASTReader::loadPendingDeclChain failed reading rec code: " +
4260 toString(MaybeCode.takeError()));
4261
4262 // FIXME: We have several different dispatches on decl kind here; maybe
4263 // we should instead generate one loop per kind and dispatch up-front?
4264 Decl *MostRecent = FirstLocal;
4265 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4266 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4267 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4268 MostRecent = D;
4269 }
4270 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4271}
4272
4273namespace {
4274
4275 /// Given an ObjC interface, goes through the modules and links to the
4276 /// interface all the categories for it.
4277 class ObjCCategoriesVisitor {
4278 ASTReader &Reader;
4279 ObjCInterfaceDecl *Interface;
4280 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4281 ObjCCategoryDecl *Tail = nullptr;
4282 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4283 serialization::GlobalDeclID InterfaceID;
4284 unsigned PreviousGeneration;
4285
4286 void add(ObjCCategoryDecl *Cat) {
4287 // Only process each category once.
4288 if (!Deserialized.erase(Cat))
4289 return;
4290
4291 // Check for duplicate categories.
4292 if (Cat->getDeclName()) {
4293 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4294 if (Existing &&
4295 Reader.getOwningModuleFile(Existing)
4296 != Reader.getOwningModuleFile(Cat)) {
4297 // FIXME: We should not warn for duplicates in diamond:
4298 //
4299 // MT //
4300 // / \ //
4301 // ML MR //
4302 // \ / //
4303 // MB //
4304 //
4305 // If there are duplicates in ML/MR, there will be warning when
4306 // creating MB *and* when importing MB. We should not warn when
4307 // importing.
4308 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4309 << Interface->getDeclName() << Cat->getDeclName();
4310 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4311 } else if (!Existing) {
4312 // Record this category.
4313 Existing = Cat;
4314 }
4315 }
4316
4317 // Add this category to the end of the chain.
4318 if (Tail)
4319 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4320 else
4321 Interface->setCategoryListRaw(Cat);
4322 Tail = Cat;
4323 }
4324
4325 public:
4326 ObjCCategoriesVisitor(ASTReader &Reader,
4327 ObjCInterfaceDecl *Interface,
4328 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4329 serialization::GlobalDeclID InterfaceID,
4330 unsigned PreviousGeneration)
4331 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4332 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4333 // Populate the name -> category map with the set of known categories.
4334 for (auto *Cat : Interface->known_categories()) {
4335 if (Cat->getDeclName())
4336 NameCategoryMap[Cat->getDeclName()] = Cat;
4337
4338 // Keep track of the tail of the category list.
4339 Tail = Cat;
4340 }
4341 }
4342
4343 bool operator()(ModuleFile &M) {
4344 // If we've loaded all of the category information we care about from
4345 // this module file, we're done.
4346 if (M.Generation <= PreviousGeneration)
4347 return true;
4348
4349 // Map global ID of the definition down to the local ID used in this
4350 // module file. If there is no such mapping, we'll find nothing here
4351 // (or in any module it imports).
4352 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4353 if (!LocalID)
4354 return true;
4355
4356 // Perform a binary search to find the local redeclarations for this
4357 // declaration (if any).
4358 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4359 const ObjCCategoriesInfo *Result
4360 = std::lower_bound(M.ObjCCategoriesMap,
4361 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4362 Compare);
4363 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4364 Result->DefinitionID != LocalID) {
4365 // We didn't find anything. If the class definition is in this module
4366 // file, then the module files it depends on cannot have any categories,
4367 // so suppress further lookup.
4368 return Reader.isDeclIDFromModule(InterfaceID, M);
4369 }
4370
4371 // We found something. Dig out all of the categories.
4372 unsigned Offset = Result->Offset;
4373 unsigned N = M.ObjCCategories[Offset];
4374 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4375 for (unsigned I = 0; I != N; ++I)
4376 add(cast_or_null<ObjCCategoryDecl>(
4377 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4378 return true;
4379 }
4380 };
4381
4382} // namespace
4383
4384void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4385 ObjCInterfaceDecl *D,
4386 unsigned PreviousGeneration) {
4387 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4388 PreviousGeneration);
4389 ModuleMgr.visit(Visitor);
4390}
4391
4392template<typename DeclT, typename Fn>
4393static void forAllLaterRedecls(DeclT *D, Fn F) {
4394 F(D);
4395
4396 // Check whether we've already merged D into its redeclaration chain.
4397 // MostRecent may or may not be nullptr if D has not been merged. If
4398 // not, walk the merged redecl chain and see if it's there.
4399 auto *MostRecent = D->getMostRecentDecl();
4400 bool Found = false;
4401 for (auto *Redecl = MostRecent; Redecl && !Found;
4402 Redecl = Redecl->getPreviousDecl())
4403 Found = (Redecl == D);
4404
4405 // If this declaration is merged, apply the functor to all later decls.
4406 if (Found) {
4407 for (auto *Redecl = MostRecent; Redecl != D;
4408 Redecl = Redecl->getPreviousDecl())
4409 F(Redecl);
4410 }
4411}
4412
4413void ASTDeclReader::UpdateDecl(Decl *D,
4414 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4415 while (Record.getIdx() < Record.size()) {
4416 switch ((DeclUpdateKind)Record.readInt()) {
4417 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4418 auto *RD = cast<CXXRecordDecl>(D);
4419 // FIXME: If we also have an update record for instantiating the
4420 // definition of D, we need that to happen before we get here.
4421 Decl *MD = Record.readDecl();
4422 assert(MD && "couldn't read decl from update record")((MD && "couldn't read decl from update record") ? static_cast
<void> (0) : __assert_fail ("MD && \"couldn't read decl from update record\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4422, __PRETTY_FUNCTION__))
;
4423 // FIXME: We should call addHiddenDecl instead, to add the member
4424 // to its DeclContext.
4425 RD->addedMember(MD);
4426 break;
4427 }
4428
4429 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4430 // It will be added to the template's lazy specialization set.
4431 PendingLazySpecializationIDs.push_back(readDeclID());
4432 break;
4433
4434 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4435 auto *Anon = readDeclAs<NamespaceDecl>();
4436
4437 // Each module has its own anonymous namespace, which is disjoint from
4438 // any other module's anonymous namespaces, so don't attach the anonymous
4439 // namespace at all.
4440 if (!Record.isModule()) {
4441 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4442 TU->setAnonymousNamespace(Anon);
4443 else
4444 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4445 }
4446 break;
4447 }
4448
4449 case UPD_CXX_ADDED_VAR_DEFINITION: {
4450 auto *VD = cast<VarDecl>(D);
4451 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4452 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4453 uint64_t Val = Record.readInt();
4454 if (Val && !VD->getInit()) {
4455 VD->setInit(Record.readExpr());
4456 if (Val != 1) {
4457 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4458 Eval->HasConstantInitialization = (Val & 2) != 0;
4459 Eval->HasConstantDestruction = (Val & 4) != 0;
4460 }
4461 }
4462 break;
4463 }
4464
4465 case UPD_CXX_POINT_OF_INSTANTIATION: {
4466 SourceLocation POI = Record.readSourceLocation();
4467 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4468 VTSD->setPointOfInstantiation(POI);
4469 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4470 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4471 } else {
4472 auto *FD = cast<FunctionDecl>(D);
4473 if (auto *FTSInfo = FD->TemplateOrSpecialization
4474 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4475 FTSInfo->setPointOfInstantiation(POI);
4476 else
4477 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4478 ->setPointOfInstantiation(POI);
4479 }
4480 break;
4481 }
4482
4483 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4484 auto *Param = cast<ParmVarDecl>(D);
4485
4486 // We have to read the default argument regardless of whether we use it
4487 // so that hypothetical further update records aren't messed up.
4488 // TODO: Add a function to skip over the next expr record.
4489 auto *DefaultArg = Record.readExpr();
4490
4491 // Only apply the update if the parameter still has an uninstantiated
4492 // default argument.
4493 if (Param->hasUninstantiatedDefaultArg())
4494 Param->setDefaultArg(DefaultArg);
4495 break;
4496 }
4497
4498 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4499 auto *FD = cast<FieldDecl>(D);
4500 auto *DefaultInit = Record.readExpr();
4501
4502 // Only apply the update if the field still has an uninstantiated
4503 // default member initializer.
4504 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4505 if (DefaultInit)
4506 FD->setInClassInitializer(DefaultInit);
4507 else
4508 // Instantiation failed. We can get here if we serialized an AST for
4509 // an invalid program.
4510 FD->removeInClassInitializer();
4511 }
4512 break;
4513 }
4514
4515 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4516 auto *FD = cast<FunctionDecl>(D);
4517 if (Reader.PendingBodies[FD]) {
4518 // FIXME: Maybe check for ODR violations.
4519 // It's safe to stop now because this update record is always last.
4520 return;
4521 }
4522
4523 if (Record.readInt()) {
4524 // Maintain AST consistency: any later redeclarations of this function
4525 // are inline if this one is. (We might have merged another declaration
4526 // into this one.)
4527 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4528 FD->setImplicitlyInline();
4529 });
4530 }
4531 FD->setInnerLocStart(readSourceLocation());
4532 ReadFunctionDefinition(FD);
4533 assert(Record.getIdx() == Record.size() && "lazy body must be last")((Record.getIdx() == Record.size() && "lazy body must be last"
) ? static_cast<void> (0) : __assert_fail ("Record.getIdx() == Record.size() && \"lazy body must be last\""
, "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4533, __PRETTY_FUNCTION__))
;
4534 break;
4535 }
4536
4537 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4538 auto *RD = cast<CXXRecordDecl>(D);
4539 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4540 bool HadRealDefinition =
4541 OldDD && (OldDD->Definition != RD ||
4542 !Reader.PendingFakeDefinitionData.count(OldDD));
4543 RD->setParamDestroyedInCallee(Record.readInt());
4544 RD->setArgPassingRestrictions(
4545 (RecordDecl::ArgPassingKind)Record.readInt());
4546 ReadCXXRecordDefinition(RD, /*Update*/true);
4547
4548 // Visible update is handled separately.
4549 uint64_t LexicalOffset = ReadLocalOffset();
4550 if (!HadRealDefinition && LexicalOffset) {
4551 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4552 Reader.PendingFakeDefinitionData.erase(OldDD);
4553 }
4554
4555 auto TSK = (TemplateSpecializationKind)Record.readInt();
4556 SourceLocation POI = readSourceLocation();
4557 if (MemberSpecializationInfo *MSInfo =
4558 RD->getMemberSpecializationInfo()) {
4559 MSInfo->setTemplateSpecializationKind(TSK);
4560 MSInfo->setPointOfInstantiation(POI);
4561 } else {
4562 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4563 Spec->setTemplateSpecializationKind(TSK);
4564 Spec->setPointOfInstantiation(POI);
4565
4566 if (Record.readInt()) {
4567 auto *PartialSpec =
4568 readDeclAs<ClassTemplatePartialSpecializationDecl>();
4569 SmallVector<TemplateArgument, 8> TemplArgs;
4570 Record.readTemplateArgumentList(TemplArgs);
4571 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4572 Reader.getContext(), TemplArgs);
4573
4574 // FIXME: If we already have a partial specialization set,
4575 // check that it matches.
4576 if (!Spec->getSpecializedTemplateOrPartial()
4577 .is<ClassTemplatePartialSpecializationDecl *>())
4578 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4579 }
4580 }
4581
4582 RD->setTagKind((TagTypeKind)Record.readInt());
4583 RD->setLocation(readSourceLocation());
4584 RD->setLocStart(readSourceLocation());
4585 RD->setBraceRange(readSourceRange());
4586
4587 if (Record.readInt()) {
4588 AttrVec Attrs;
4589 Record.readAttributes(Attrs);
4590 // If the declaration already has attributes, we assume that some other
4591 // AST file already loaded them.
4592 if (!D->hasAttrs())
4593 D->setAttrsImpl(Attrs, Reader.getContext());
4594 }
4595 break;
4596 }
4597
4598 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4599 // Set the 'operator delete' directly to avoid emitting another update
4600 // record.
4601 auto *Del = readDeclAs<FunctionDecl>();
4602 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4603 auto *ThisArg = Record.readExpr();
4604 // FIXME: Check consistency if we have an old and new operator delete.
4605 if (!First->OperatorDelete) {
4606 First->OperatorDelete = Del;
4607 First->OperatorDeleteThisArg = ThisArg;
4608 }
4609 break;
4610 }
4611
4612 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4613 SmallVector<QualType, 8> ExceptionStorage;
4614 auto ESI = Record.readExceptionSpecInfo(ExceptionStorage);
4615
4616 // Update this declaration's exception specification, if needed.
4617 auto *FD = cast<FunctionDecl>(D);
4618 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4619 // FIXME: If the exception specification is already present, check that it
4620 // matches.
4621 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4622 FD->setType(Reader.getContext().getFunctionType(
4623 FPT->getReturnType(), FPT->getParamTypes(),
4624 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4625
4626 // When we get to the end of deserializing, see if there are other decls
4627 // that we need to propagate this exception specification onto.
4628 Reader.PendingExceptionSpecUpdates.insert(
4629 std::make_pair(FD->getCanonicalDecl(), FD));
4630 }
4631 break;
4632 }
4633
4634 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4635 auto *FD = cast<FunctionDecl>(D);
4636 QualType DeducedResultType = Record.readType();
4637 Reader.PendingDeducedTypeUpdates.insert(
4638 {FD->getCanonicalDecl(), DeducedResultType});
4639 break;
4640 }
4641
4642 case UPD_DECL_MARKED_USED:
4643 // Maintain AST consistency: any later redeclarations are used too.
4644 D->markUsed(Reader.getContext());
4645 break;
4646
4647 case UPD_MANGLING_NUMBER:
4648 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4649 Record.readInt());
4650 break;
4651
4652 case UPD_STATIC_LOCAL_NUMBER:
4653 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4654 Record.readInt());
4655 break;
4656
4657 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4658 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
4659 Reader.getContext(), readSourceRange(),
4660 AttributeCommonInfo::AS_Pragma));
4661 break;
4662
4663 case UPD_DECL_MARKED_OPENMP_ALLOCATE: {
4664 auto AllocatorKind =
4665 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4666 Expr *Allocator = Record.readExpr();
4667 SourceRange SR = readSourceRange();
4668 D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4669 Reader.getContext(), AllocatorKind, Allocator, SR,
4670 AttributeCommonInfo::AS_Pragma));
4671 break;
4672 }
4673
4674 case UPD_DECL_EXPORTED: {
4675 unsigned SubmoduleID = readSubmoduleID();
4676 auto *Exported = cast<NamedDecl>(D);
4677 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4678 Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4679 Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4680 break;
4681 }
4682
4683 case UPD_DECL_MARKED_OPENMP_DECLARETARGET: {
4684 auto MapType = Record.readEnum<OMPDeclareTargetDeclAttr::MapTypeTy>();
4685 auto DevType = Record.readEnum<OMPDeclareTargetDeclAttr::DevTypeTy>();
4686 unsigned Level = Record.readInt();
4687 D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4688 Reader.getContext(), MapType, DevType, Level, readSourceRange(),
4689 AttributeCommonInfo::AS_Pragma));
4690 break;
4691 }
4692
4693 case UPD_ADDED_ATTR_TO_RECORD:
4694 AttrVec Attrs;
4695 Record.readAttributes(Attrs);
4696 assert(Attrs.size() == 1)((Attrs.size() == 1) ? static_cast<void> (0) : __assert_fail
("Attrs.size() == 1", "/build/llvm-toolchain-snapshot-12~++20201026111116+d3205bbca3e/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4696, __PRETTY_FUNCTION__))
;
4697 D->addAttr(Attrs[0]);
4698 break;
4699 }
4700 }
4701}