Bug Summary

File:clang/lib/Serialization/ASTReaderDecl.cpp
Warning:line 4159, column 11
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ASTReaderDecl.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/include -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/build-llvm/include -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/build-llvm/tools/clang/lib/Serialization -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-01-13-084841-49055-1 -x c++ /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/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-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 105, __PRETTY_FUNCTION__))
;
106 return LocalOffset ? Loc.Offset - LocalOffset : 0;
107 }
108
109 uint64_t ReadGlobalOffset() {
110 uint64_t Local = ReadLocalOffset();
111 return Local ? Record.getGlobalBitOffset(Local) : 0;
112 }
113
114 SourceLocation readSourceLocation() {
115 return Record.readSourceLocation();
116 }
117
118 SourceRange readSourceRange() {
119 return Record.readSourceRange();
120 }
121
122 TypeSourceInfo *readTypeSourceInfo() {
123 return Record.readTypeSourceInfo();
124 }
125
126 serialization::DeclID readDeclID() {
127 return Record.readDeclID();
128 }
129
130 std::string readString() {
131 return Record.readString();
132 }
133
134 void readDeclIDList(SmallVectorImpl<DeclID> &IDs) {
135 for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
136 IDs.push_back(readDeclID());
137 }
138
139 Decl *readDecl() {
140 return Record.readDecl();
141 }
142
143 template<typename T>
144 T *readDeclAs() {
145 return Record.readDeclAs<T>();
146 }
147
148 serialization::SubmoduleID readSubmoduleID() {
149 if (Record.getIdx() == Record.size())
150 return 0;
151
152 return Record.getGlobalSubmoduleID(Record.readInt());
153 }
154
155 Module *readModule() {
156 return Record.getSubmodule(readSubmoduleID());
157 }
158
159 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
160 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
161 const CXXRecordDecl *D);
162 void MergeDefinitionData(CXXRecordDecl *D,
163 struct CXXRecordDecl::DefinitionData &&NewDD);
164 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
165 void MergeDefinitionData(ObjCInterfaceDecl *D,
166 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
167 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
168 void MergeDefinitionData(ObjCProtocolDecl *D,
169 struct ObjCProtocolDecl::DefinitionData &&NewDD);
170
171 static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
172
173 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
174 DeclContext *DC,
175 unsigned Index);
176 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
177 unsigned Index, NamedDecl *D);
178
179 /// Results from loading a RedeclarableDecl.
180 class RedeclarableResult {
181 Decl *MergeWith;
182 GlobalDeclID FirstID;
183 bool IsKeyDecl;
184
185 public:
186 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
187 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
188
189 /// Retrieve the first ID.
190 GlobalDeclID getFirstID() const { return FirstID; }
191
192 /// Is this declaration a key declaration?
193 bool isKeyDecl() const { return IsKeyDecl; }
194
195 /// Get a known declaration that this should be merged with, if
196 /// any.
197 Decl *getKnownMergeTarget() const { return MergeWith; }
198 };
199
200 /// Class used to capture the result of searching for an existing
201 /// declaration of a specific kind and name, along with the ability
202 /// to update the place where this result was found (the declaration
203 /// chain hanging off an identifier or the DeclContext we searched in)
204 /// if requested.
205 class FindExistingResult {
206 ASTReader &Reader;
207 NamedDecl *New = nullptr;
208 NamedDecl *Existing = nullptr;
209 bool AddResult = false;
210 unsigned AnonymousDeclNumber = 0;
211 IdentifierInfo *TypedefNameForLinkage = nullptr;
212
213 public:
214 FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
215
216 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
217 unsigned AnonymousDeclNumber,
218 IdentifierInfo *TypedefNameForLinkage)
219 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
220 AnonymousDeclNumber(AnonymousDeclNumber),
221 TypedefNameForLinkage(TypedefNameForLinkage) {}
222
223 FindExistingResult(FindExistingResult &&Other)
224 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
225 AddResult(Other.AddResult),
226 AnonymousDeclNumber(Other.AnonymousDeclNumber),
227 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
228 Other.AddResult = false;
229 }
230
231 FindExistingResult &operator=(FindExistingResult &&) = delete;
232 ~FindExistingResult();
233
234 /// Suppress the addition of this result into the known set of
235 /// names.
236 void suppress() { AddResult = false; }
237
238 operator NamedDecl*() const { return Existing; }
239
240 template<typename T>
241 operator T*() const { return dyn_cast_or_null<T>(Existing); }
242 };
243
244 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
245 DeclContext *DC);
246 FindExistingResult findExisting(NamedDecl *D);
247
248 public:
249 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
250 ASTReader::RecordLocation Loc,
251 DeclID thisDeclID, SourceLocation ThisDeclLoc)
252 : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
253 ThisDeclLoc(ThisDeclLoc) {}
254
255 template <typename T> static
256 void AddLazySpecializations(T *D,
257 SmallVectorImpl<serialization::DeclID>& IDs) {
258 if (IDs.empty())
259 return;
260
261 // FIXME: We should avoid this pattern of getting the ASTContext.
262 ASTContext &C = D->getASTContext();
263
264 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
265
266 if (auto &Old = LazySpecializations) {
267 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
268 llvm::sort(IDs);
269 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
270 }
271
272 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
273 *Result = IDs.size();
274 std::copy(IDs.begin(), IDs.end(), Result + 1);
275
276 LazySpecializations = Result;
277 }
278
279 template <typename DeclT>
280 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
281 static Decl *getMostRecentDeclImpl(...);
282 static Decl *getMostRecentDecl(Decl *D);
283
284 template <typename DeclT>
285 static void attachPreviousDeclImpl(ASTReader &Reader,
286 Redeclarable<DeclT> *D, Decl *Previous,
287 Decl *Canon);
288 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
289 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
290 Decl *Canon);
291
292 template <typename DeclT>
293 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
294 static void attachLatestDeclImpl(...);
295 static void attachLatestDecl(Decl *D, Decl *latest);
296
297 template <typename DeclT>
298 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
299 static void markIncompleteDeclChainImpl(...);
300
301 /// Determine whether this declaration has a pending body.
302 bool hasPendingBody() const { return HasPendingBody; }
303
304 void ReadFunctionDefinition(FunctionDecl *FD);
305 void Visit(Decl *D);
306
307 void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
308
309 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
310 ObjCCategoryDecl *Next) {
311 Cat->NextClassCategory = Next;
312 }
313
314 void VisitDecl(Decl *D);
315 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
316 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
317 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
318 void VisitNamedDecl(NamedDecl *ND);
319 void VisitLabelDecl(LabelDecl *LD);
320 void VisitNamespaceDecl(NamespaceDecl *D);
321 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
322 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
323 void VisitTypeDecl(TypeDecl *TD);
324 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
325 void VisitTypedefDecl(TypedefDecl *TD);
326 void VisitTypeAliasDecl(TypeAliasDecl *TD);
327 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
328 RedeclarableResult VisitTagDecl(TagDecl *TD);
329 void VisitEnumDecl(EnumDecl *ED);
330 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
331 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
332 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
333 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
334 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
335 ClassTemplateSpecializationDecl *D);
336
337 void VisitClassTemplateSpecializationDecl(
338 ClassTemplateSpecializationDecl *D) {
339 VisitClassTemplateSpecializationDeclImpl(D);
340 }
341
342 void VisitClassTemplatePartialSpecializationDecl(
343 ClassTemplatePartialSpecializationDecl *D);
344 void VisitClassScopeFunctionSpecializationDecl(
345 ClassScopeFunctionSpecializationDecl *D);
346 RedeclarableResult
347 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
348
349 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
350 VisitVarTemplateSpecializationDeclImpl(D);
351 }
352
353 void VisitVarTemplatePartialSpecializationDecl(
354 VarTemplatePartialSpecializationDecl *D);
355 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
356 void VisitValueDecl(ValueDecl *VD);
357 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
358 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
359 void VisitDeclaratorDecl(DeclaratorDecl *DD);
360 void VisitFunctionDecl(FunctionDecl *FD);
361 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
362 void VisitCXXMethodDecl(CXXMethodDecl *D);
363 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
364 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
365 void VisitCXXConversionDecl(CXXConversionDecl *D);
366 void VisitFieldDecl(FieldDecl *FD);
367 void VisitMSPropertyDecl(MSPropertyDecl *FD);
368 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
369 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
370 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
371 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
372 void VisitParmVarDecl(ParmVarDecl *PD);
373 void VisitDecompositionDecl(DecompositionDecl *DD);
374 void VisitBindingDecl(BindingDecl *BD);
375 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
376 DeclID VisitTemplateDecl(TemplateDecl *D);
377 void VisitConceptDecl(ConceptDecl *D);
378 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
379 void VisitClassTemplateDecl(ClassTemplateDecl *D);
380 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
381 void VisitVarTemplateDecl(VarTemplateDecl *D);
382 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
383 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
384 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
385 void VisitUsingDecl(UsingDecl *D);
386 void VisitUsingPackDecl(UsingPackDecl *D);
387 void VisitUsingShadowDecl(UsingShadowDecl *D);
388 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
389 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
390 void VisitExportDecl(ExportDecl *D);
391 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
392 void VisitImportDecl(ImportDecl *D);
393 void VisitAccessSpecDecl(AccessSpecDecl *D);
394 void VisitFriendDecl(FriendDecl *D);
395 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
396 void VisitStaticAssertDecl(StaticAssertDecl *D);
397 void VisitBlockDecl(BlockDecl *BD);
398 void VisitCapturedDecl(CapturedDecl *CD);
399 void VisitEmptyDecl(EmptyDecl *D);
400 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
401
402 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
403
404 template<typename T>
405 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
406
407 template<typename T>
408 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
409 DeclID TemplatePatternID = 0);
410
411 template<typename T>
412 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
413 RedeclarableResult &Redecl,
414 DeclID TemplatePatternID = 0);
415
416 template<typename T>
417 void mergeMergeable(Mergeable<T> *D);
418
419 void mergeMergeable(LifetimeExtendedTemporaryDecl *D);
420
421 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
422 RedeclarableTemplateDecl *Existing,
423 DeclID DsID, bool IsKeyDecl);
424
425 ObjCTypeParamList *ReadObjCTypeParamList();
426
427 // FIXME: Reorder according to DeclNodes.td?
428 void VisitObjCMethodDecl(ObjCMethodDecl *D);
429 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
430 void VisitObjCContainerDecl(ObjCContainerDecl *D);
431 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
432 void VisitObjCIvarDecl(ObjCIvarDecl *D);
433 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
434 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
435 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
436 void VisitObjCImplDecl(ObjCImplDecl *D);
437 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
438 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
439 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
440 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
441 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
442 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
443 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
444 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
445 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
446 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
447 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
448 };
449
450} // namespace clang
451
452namespace {
453
454/// Iterator over the redeclarations of a declaration that have already
455/// been merged into the same redeclaration chain.
456template<typename DeclT>
457class MergedRedeclIterator {
458 DeclT *Start;
459 DeclT *Canonical = nullptr;
460 DeclT *Current = nullptr;
461
462public:
463 MergedRedeclIterator() = default;
464 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
465
466 DeclT *operator*() { return Current; }
467
468 MergedRedeclIterator &operator++() {
469 if (Current->isFirstDecl()) {
470 Canonical = Current;
471 Current = Current->getMostRecentDecl();
472 } else
473 Current = Current->getPreviousDecl();
474
475 // If we started in the merged portion, we'll reach our start position
476 // eventually. Otherwise, we'll never reach it, but the second declaration
477 // we reached was the canonical declaration, so stop when we see that one
478 // again.
479 if (Current == Start || Current == Canonical)
480 Current = nullptr;
481 return *this;
482 }
483
484 friend bool operator!=(const MergedRedeclIterator &A,
485 const MergedRedeclIterator &B) {
486 return A.Current != B.Current;
487 }
488};
489
490} // namespace
491
492template <typename DeclT>
493static llvm::iterator_range<MergedRedeclIterator<DeclT>>
494merged_redecls(DeclT *D) {
495 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
496 MergedRedeclIterator<DeclT>());
497}
498
499uint64_t ASTDeclReader::GetCurrentCursorOffset() {
500 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
501}
502
503void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
504 if (Record.readInt())
505 Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
506 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
507 CD->setNumCtorInitializers(Record.readInt());
508 if (CD->getNumCtorInitializers())
509 CD->CtorInitializers = ReadGlobalOffset();
510 }
511 // Store the offset of the body so we can lazily load it later.
512 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
513 HasPendingBody = true;
514}
515
516void ASTDeclReader::Visit(Decl *D) {
517 DeclVisitor<ASTDeclReader, void>::Visit(D);
518
519 // At this point we have deserialized and merged the decl and it is safe to
520 // update its canonical decl to signal that the entire entity is used.
521 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
522 IsDeclMarkedUsed = false;
523
524 if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
525 if (auto *TInfo = DD->getTypeSourceInfo())
526 Record.readTypeLoc(TInfo->getTypeLoc());
527 }
528
529 if (auto *TD = dyn_cast<TypeDecl>(D)) {
530 // We have a fully initialized TypeDecl. Read its type now.
531 TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
532
533 // If this is a tag declaration with a typedef name for linkage, it's safe
534 // to load that typedef now.
535 if (NamedDeclForTagDecl)
536 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
537 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
538 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
539 // if we have a fully initialized TypeDecl, we can safely read its type now.
540 ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
541 } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
542 // FunctionDecl's body was written last after all other Stmts/Exprs.
543 // We only read it if FD doesn't already have a body (e.g., from another
544 // module).
545 // FIXME: Can we diagnose ODR violations somehow?
546 if (Record.readInt())
547 ReadFunctionDefinition(FD);
548 }
549}
550
551void ASTDeclReader::VisitDecl(Decl *D) {
552 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
553 isa<ParmVarDecl>(D)) {
554 // We don't want to deserialize the DeclContext of a template
555 // parameter or of a parameter of a function template immediately. These
556 // entities might be used in the formulation of its DeclContext (for
557 // example, a function parameter can be used in decltype() in trailing
558 // return type of the function). Use the translation unit DeclContext as a
559 // placeholder.
560 GlobalDeclID SemaDCIDForTemplateParmDecl = readDeclID();
561 GlobalDeclID LexicalDCIDForTemplateParmDecl = readDeclID();
562 if (!LexicalDCIDForTemplateParmDecl)
563 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
564 Reader.addPendingDeclContextInfo(D,
565 SemaDCIDForTemplateParmDecl,
566 LexicalDCIDForTemplateParmDecl);
567 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
568 } else {
569 auto *SemaDC = readDeclAs<DeclContext>();
570 auto *LexicalDC = readDeclAs<DeclContext>();
571 if (!LexicalDC)
572 LexicalDC = SemaDC;
573 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
574 // Avoid calling setLexicalDeclContext() directly because it uses
575 // Decl::getASTContext() internally which is unsafe during derialization.
576 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
577 Reader.getContext());
578 }
579 D->setLocation(ThisDeclLoc);
580 D->setInvalidDecl(Record.readInt());
581 if (Record.readInt()) { // hasAttrs
582 AttrVec Attrs;
583 Record.readAttributes(Attrs);
584 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
585 // internally which is unsafe during derialization.
586 D->setAttrsImpl(Attrs, Reader.getContext());
587 }
588 D->setImplicit(Record.readInt());
589 D->Used = Record.readInt();
590 IsDeclMarkedUsed |= D->Used;
591 D->setReferenced(Record.readInt());
592 D->setTopLevelDeclInObjCContainer(Record.readInt());
593 D->setAccess((AccessSpecifier)Record.readInt());
594 D->FromASTFile = true;
595 bool ModulePrivate = Record.readInt();
596
597 // Determine whether this declaration is part of a (sub)module. If so, it
598 // may not yet be visible.
599 if (unsigned SubmoduleID = readSubmoduleID()) {
600 // Store the owning submodule ID in the declaration.
601 D->setModuleOwnershipKind(
602 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
603 : Decl::ModuleOwnershipKind::VisibleWhenImported);
604 D->setOwningModuleID(SubmoduleID);
605
606 if (ModulePrivate) {
607 // Module-private declarations are never visible, so there is no work to
608 // do.
609 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
610 // If local visibility is being tracked, this declaration will become
611 // hidden and visible as the owning module does.
612 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
613 // Mark the declaration as visible when its owning module becomes visible.
614 if (Owner->NameVisibility == Module::AllVisible)
615 D->setVisibleDespiteOwningModule();
616 else
617 Reader.HiddenNamesMap[Owner].push_back(D);
618 }
619 } else if (ModulePrivate) {
620 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
621 }
622}
623
624void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
625 VisitDecl(D);
626 D->setLocation(readSourceLocation());
627 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
628 std::string Arg = readString();
629 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
630 D->getTrailingObjects<char>()[Arg.size()] = '\0';
631}
632
633void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
634 VisitDecl(D);
635 D->setLocation(readSourceLocation());
636 std::string Name = readString();
637 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
638 D->getTrailingObjects<char>()[Name.size()] = '\0';
639
640 D->ValueStart = Name.size() + 1;
641 std::string Value = readString();
642 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
643 Value.size());
644 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
645}
646
647void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
648 llvm_unreachable("Translation units are not serialized")::llvm::llvm_unreachable_internal("Translation units are not serialized"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 648)
;
649}
650
651void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
652 VisitDecl(ND);
653 ND->setDeclName(Record.readDeclarationName());
654 AnonymousDeclNumber = Record.readInt();
655}
656
657void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
658 VisitNamedDecl(TD);
659 TD->setLocStart(readSourceLocation());
660 // Delay type reading until after we have fully initialized the decl.
661 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
662}
663
664ASTDeclReader::RedeclarableResult
665ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
666 RedeclarableResult Redecl = VisitRedeclarable(TD);
667 VisitTypeDecl(TD);
668 TypeSourceInfo *TInfo = readTypeSourceInfo();
669 if (Record.readInt()) { // isModed
670 QualType modedT = Record.readType();
671 TD->setModedTypeSourceInfo(TInfo, modedT);
672 } else
673 TD->setTypeSourceInfo(TInfo);
674 // Read and discard the declaration for which this is a typedef name for
675 // linkage, if it exists. We cannot rely on our type to pull in this decl,
676 // because it might have been merged with a type from another module and
677 // thus might not refer to our version of the declaration.
678 readDecl();
679 return Redecl;
680}
681
682void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
683 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
684 mergeRedeclarable(TD, Redecl);
685}
686
687void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
688 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
689 if (auto *Template = readDeclAs<TypeAliasTemplateDecl>())
690 // Merged when we merge the template.
691 TD->setDescribedAliasTemplate(Template);
692 else
693 mergeRedeclarable(TD, Redecl);
694}
695
696ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
697 RedeclarableResult Redecl = VisitRedeclarable(TD);
698 VisitTypeDecl(TD);
699
700 TD->IdentifierNamespace = Record.readInt();
701 TD->setTagKind((TagDecl::TagKind)Record.readInt());
702 if (!isa<CXXRecordDecl>(TD))
703 TD->setCompleteDefinition(Record.readInt());
704 TD->setEmbeddedInDeclarator(Record.readInt());
705 TD->setFreeStanding(Record.readInt());
706 TD->setCompleteDefinitionRequired(Record.readInt());
707 TD->setBraceRange(readSourceRange());
708
709 switch (Record.readInt()) {
710 case 0:
711 break;
712 case 1: { // ExtInfo
713 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
714 Record.readQualifierInfo(*Info);
715 TD->TypedefNameDeclOrQualifier = Info;
716 break;
717 }
718 case 2: // TypedefNameForAnonDecl
719 NamedDeclForTagDecl = readDeclID();
720 TypedefNameForLinkage = Record.readIdentifier();
721 break;
722 default:
723 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 723)
;
724 }
725
726 if (!isa<CXXRecordDecl>(TD))
727 mergeRedeclarable(TD, Redecl);
728 return Redecl;
729}
730
731void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
732 VisitTagDecl(ED);
733 if (TypeSourceInfo *TI = readTypeSourceInfo())
734 ED->setIntegerTypeSourceInfo(TI);
735 else
736 ED->setIntegerType(Record.readType());
737 ED->setPromotionType(Record.readType());
738 ED->setNumPositiveBits(Record.readInt());
739 ED->setNumNegativeBits(Record.readInt());
740 ED->setScoped(Record.readInt());
741 ED->setScopedUsingClassTag(Record.readInt());
742 ED->setFixed(Record.readInt());
743
744 ED->setHasODRHash(true);
745 ED->ODRHash = Record.readInt();
746
747 // If this is a definition subject to the ODR, and we already have a
748 // definition, merge this one into it.
749 if (ED->isCompleteDefinition() &&
750 Reader.getContext().getLangOpts().Modules &&
751 Reader.getContext().getLangOpts().CPlusPlus) {
752 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
753 if (!OldDef) {
754 // This is the first time we've seen an imported definition. Look for a
755 // local definition before deciding that we are the first definition.
756 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
757 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
758 OldDef = D;
759 break;
760 }
761 }
762 }
763 if (OldDef) {
764 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
765 ED->setCompleteDefinition(false);
766 Reader.mergeDefinitionVisibility(OldDef, ED);
767 if (OldDef->getODRHash() != ED->getODRHash())
768 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
769 } else {
770 OldDef = ED;
771 }
772 }
773
774 if (auto *InstED = readDeclAs<EnumDecl>()) {
775 auto TSK = (TemplateSpecializationKind)Record.readInt();
776 SourceLocation POI = readSourceLocation();
777 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
778 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
779 }
780}
781
782ASTDeclReader::RedeclarableResult
783ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
784 RedeclarableResult Redecl = VisitTagDecl(RD);
785 RD->setHasFlexibleArrayMember(Record.readInt());
786 RD->setAnonymousStructOrUnion(Record.readInt());
787 RD->setHasObjectMember(Record.readInt());
788 RD->setHasVolatileMember(Record.readInt());
789 RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
790 RD->setNonTrivialToPrimitiveCopy(Record.readInt());
791 RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
792 RD->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(Record.readInt());
793 RD->setHasNonTrivialToPrimitiveDestructCUnion(Record.readInt());
794 RD->setHasNonTrivialToPrimitiveCopyCUnion(Record.readInt());
795 RD->setParamDestroyedInCallee(Record.readInt());
796 RD->setArgPassingRestrictions((RecordDecl::ArgPassingKind)Record.readInt());
797 return Redecl;
798}
799
800void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
801 VisitNamedDecl(VD);
802 // For function declarations, defer reading the type in case the function has
803 // a deduced return type that references an entity declared within the
804 // function.
805 if (isa<FunctionDecl>(VD))
806 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
807 else
808 VD->setType(Record.readType());
809}
810
811void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
812 VisitValueDecl(ECD);
813 if (Record.readInt())
814 ECD->setInitExpr(Record.readExpr());
815 ECD->setInitVal(Record.readAPSInt());
816 mergeMergeable(ECD);
817}
818
819void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
820 VisitValueDecl(DD);
821 DD->setInnerLocStart(readSourceLocation());
822 if (Record.readInt()) { // hasExtInfo
823 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
824 Record.readQualifierInfo(*Info);
825 Info->TrailingRequiresClause = Record.readExpr();
826 DD->DeclInfo = Info;
827 }
828 QualType TSIType = Record.readType();
829 DD->setTypeSourceInfo(
830 TSIType.isNull() ? nullptr
831 : Reader.getContext().CreateTypeSourceInfo(TSIType));
832}
833
834void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
835 RedeclarableResult Redecl = VisitRedeclarable(FD);
836 VisitDeclaratorDecl(FD);
837
838 // Attach a type to this function. Use the real type if possible, but fall
839 // back to the type as written if it involves a deduced return type.
840 if (FD->getTypeSourceInfo() &&
841 FD->getTypeSourceInfo()->getType()->castAs<FunctionType>()
842 ->getReturnType()->getContainedAutoType()) {
843 // We'll set up the real type in Visit, once we've finished loading the
844 // function.
845 FD->setType(FD->getTypeSourceInfo()->getType());
846 Reader.PendingFunctionTypes.push_back({FD, DeferredTypeID});
847 } else {
848 FD->setType(Reader.GetType(DeferredTypeID));
849 }
850 DeferredTypeID = 0;
851
852 FD->DNLoc = Record.readDeclarationNameLoc(FD->getDeclName());
853 FD->IdentifierNamespace = Record.readInt();
854
855 // FunctionDecl's body is handled last at ASTDeclReader::Visit,
856 // after everything else is read.
857
858 FD->setStorageClass(static_cast<StorageClass>(Record.readInt()));
859 FD->setInlineSpecified(Record.readInt());
860 FD->setImplicitlyInline(Record.readInt());
861 FD->setVirtualAsWritten(Record.readInt());
862 FD->setPure(Record.readInt());
863 FD->setHasInheritedPrototype(Record.readInt());
864 FD->setHasWrittenPrototype(Record.readInt());
865 FD->setDeletedAsWritten(Record.readInt());
866 FD->setTrivial(Record.readInt());
867 FD->setTrivialForCall(Record.readInt());
868 FD->setDefaulted(Record.readInt());
869 FD->setExplicitlyDefaulted(Record.readInt());
870 FD->setHasImplicitReturnZero(Record.readInt());
871 FD->setConstexprKind(static_cast<ConstexprSpecKind>(Record.readInt()));
872 FD->setUsesSEHTry(Record.readInt());
873 FD->setHasSkippedBody(Record.readInt());
874 FD->setIsMultiVersion(Record.readInt());
875 FD->setLateTemplateParsed(Record.readInt());
876
877 FD->setCachedLinkage(static_cast<Linkage>(Record.readInt()));
878 FD->EndRangeLoc = readSourceLocation();
879
880 FD->ODRHash = Record.readInt();
881 FD->setHasODRHash(true);
882 FD->setUsesFPIntrin(Record.readInt());
883
884 if (FD->isDefaulted()) {
885 if (unsigned NumLookups = Record.readInt()) {
886 SmallVector<DeclAccessPair, 8> Lookups;
887 for (unsigned I = 0; I != NumLookups; ++I) {
888 NamedDecl *ND = Record.readDeclAs<NamedDecl>();
889 AccessSpecifier AS = (AccessSpecifier)Record.readInt();
890 Lookups.push_back(DeclAccessPair::make(ND, AS));
891 }
892 FD->setDefaultedFunctionInfo(FunctionDecl::DefaultedFunctionInfo::Create(
893 Reader.getContext(), Lookups));
894 }
895 }
896
897 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
898 case FunctionDecl::TK_NonTemplate:
899 mergeRedeclarable(FD, Redecl);
900 break;
901 case FunctionDecl::TK_FunctionTemplate:
902 // Merged when we merge the template.
903 FD->setDescribedFunctionTemplate(readDeclAs<FunctionTemplateDecl>());
904 break;
905 case FunctionDecl::TK_MemberSpecialization: {
906 auto *InstFD = readDeclAs<FunctionDecl>();
907 auto TSK = (TemplateSpecializationKind)Record.readInt();
908 SourceLocation POI = readSourceLocation();
909 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
910 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
911 mergeRedeclarable(FD, Redecl);
912 break;
913 }
914 case FunctionDecl::TK_FunctionTemplateSpecialization: {
915 auto *Template = readDeclAs<FunctionTemplateDecl>();
916 auto TSK = (TemplateSpecializationKind)Record.readInt();
917
918 // Template arguments.
919 SmallVector<TemplateArgument, 8> TemplArgs;
920 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
921
922 // Template args as written.
923 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
924 SourceLocation LAngleLoc, RAngleLoc;
925 bool HasTemplateArgumentsAsWritten = Record.readInt();
926 if (HasTemplateArgumentsAsWritten) {
927 unsigned NumTemplateArgLocs = Record.readInt();
928 TemplArgLocs.reserve(NumTemplateArgLocs);
929 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
930 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
931
932 LAngleLoc = readSourceLocation();
933 RAngleLoc = readSourceLocation();
934 }
935
936 SourceLocation POI = readSourceLocation();
937
938 ASTContext &C = Reader.getContext();
939 TemplateArgumentList *TemplArgList
940 = TemplateArgumentList::CreateCopy(C, TemplArgs);
941 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
942 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
943 TemplArgsInfo.addArgument(TemplArgLocs[i]);
944
945 MemberSpecializationInfo *MSInfo = nullptr;
946 if (Record.readInt()) {
947 auto *FD = readDeclAs<FunctionDecl>();
948 auto TSK = (TemplateSpecializationKind)Record.readInt();
949 SourceLocation POI = readSourceLocation();
950
951 MSInfo = new (C) MemberSpecializationInfo(FD, TSK);
952 MSInfo->setPointOfInstantiation(POI);
953 }
954
955 FunctionTemplateSpecializationInfo *FTInfo =
956 FunctionTemplateSpecializationInfo::Create(
957 C, FD, Template, TSK, TemplArgList,
958 HasTemplateArgumentsAsWritten ? &TemplArgsInfo : nullptr, POI,
959 MSInfo);
960 FD->TemplateOrSpecialization = FTInfo;
961
962 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
963 // The template that contains the specializations set. It's not safe to
964 // use getCanonicalDecl on Template since it may still be initializing.
965 auto *CanonTemplate = readDeclAs<FunctionTemplateDecl>();
966 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
967 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
968 // FunctionTemplateSpecializationInfo's Profile().
969 // We avoid getASTContext because a decl in the parent hierarchy may
970 // be initializing.
971 llvm::FoldingSetNodeID ID;
972 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
973 void *InsertPos = nullptr;
974 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
975 FunctionTemplateSpecializationInfo *ExistingInfo =
976 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
977 if (InsertPos)
978 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
979 else {
980 assert(Reader.getContext().getLangOpts().Modules &&((Reader.getContext().getLangOpts().Modules && "already deserialized this template specialization"
) ? static_cast<void> (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 981, __PRETTY_FUNCTION__))
981 "already deserialized this template specialization")((Reader.getContext().getLangOpts().Modules && "already deserialized this template specialization"
) ? static_cast<void> (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 981, __PRETTY_FUNCTION__))
;
982 mergeRedeclarable(FD, ExistingInfo->getFunction(), Redecl);
983 }
984 }
985 break;
986 }
987 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
988 // Templates.
989 UnresolvedSet<8> TemplDecls;
990 unsigned NumTemplates = Record.readInt();
991 while (NumTemplates--)
992 TemplDecls.addDecl(readDeclAs<NamedDecl>());
993
994 // Templates args.
995 TemplateArgumentListInfo TemplArgs;
996 unsigned NumArgs = Record.readInt();
997 while (NumArgs--)
998 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
999 TemplArgs.setLAngleLoc(readSourceLocation());
1000 TemplArgs.setRAngleLoc(readSourceLocation());
1001
1002 FD->setDependentTemplateSpecialization(Reader.getContext(),
1003 TemplDecls, TemplArgs);
1004 // These are not merged; we don't need to merge redeclarations of dependent
1005 // template friends.
1006 break;
1007 }
1008 }
1009
1010 // Read in the parameters.
1011 unsigned NumParams = Record.readInt();
1012 SmallVector<ParmVarDecl *, 16> Params;
1013 Params.reserve(NumParams);
1014 for (unsigned I = 0; I != NumParams; ++I)
1015 Params.push_back(readDeclAs<ParmVarDecl>());
1016 FD->setParams(Reader.getContext(), Params);
1017}
1018
1019void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
1020 VisitNamedDecl(MD);
1021 if (Record.readInt()) {
1022 // Load the body on-demand. Most clients won't care, because method
1023 // definitions rarely show up in headers.
1024 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1025 HasPendingBody = true;
1026 }
1027 MD->setSelfDecl(readDeclAs<ImplicitParamDecl>());
1028 MD->setCmdDecl(readDeclAs<ImplicitParamDecl>());
1029 MD->setInstanceMethod(Record.readInt());
1030 MD->setVariadic(Record.readInt());
1031 MD->setPropertyAccessor(Record.readInt());
1032 MD->setSynthesizedAccessorStub(Record.readInt());
1033 MD->setDefined(Record.readInt());
1034 MD->setOverriding(Record.readInt());
1035 MD->setHasSkippedBody(Record.readInt());
1036
1037 MD->setIsRedeclaration(Record.readInt());
1038 MD->setHasRedeclaration(Record.readInt());
1039 if (MD->hasRedeclaration())
1040 Reader.getContext().setObjCMethodRedeclaration(MD,
1041 readDeclAs<ObjCMethodDecl>());
1042
1043 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1044 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1045 MD->setRelatedResultType(Record.readInt());
1046 MD->setReturnType(Record.readType());
1047 MD->setReturnTypeSourceInfo(readTypeSourceInfo());
1048 MD->DeclEndLoc = readSourceLocation();
1049 unsigned NumParams = Record.readInt();
1050 SmallVector<ParmVarDecl *, 16> Params;
1051 Params.reserve(NumParams);
1052 for (unsigned I = 0; I != NumParams; ++I)
1053 Params.push_back(readDeclAs<ParmVarDecl>());
1054
1055 MD->setSelLocsKind((SelectorLocationsKind)Record.readInt());
1056 unsigned NumStoredSelLocs = Record.readInt();
1057 SmallVector<SourceLocation, 16> SelLocs;
1058 SelLocs.reserve(NumStoredSelLocs);
1059 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1060 SelLocs.push_back(readSourceLocation());
1061
1062 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1063}
1064
1065void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1066 VisitTypedefNameDecl(D);
1067
1068 D->Variance = Record.readInt();
1069 D->Index = Record.readInt();
1070 D->VarianceLoc = readSourceLocation();
1071 D->ColonLoc = readSourceLocation();
1072}
1073
1074void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1075 VisitNamedDecl(CD);
1076 CD->setAtStartLoc(readSourceLocation());
1077 CD->setAtEndRange(readSourceRange());
1078}
1079
1080ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1081 unsigned numParams = Record.readInt();
1082 if (numParams == 0)
1083 return nullptr;
1084
1085 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1086 typeParams.reserve(numParams);
1087 for (unsigned i = 0; i != numParams; ++i) {
1088 auto *typeParam = readDeclAs<ObjCTypeParamDecl>();
1089 if (!typeParam)
1090 return nullptr;
1091
1092 typeParams.push_back(typeParam);
1093 }
1094
1095 SourceLocation lAngleLoc = readSourceLocation();
1096 SourceLocation rAngleLoc = readSourceLocation();
1097
1098 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1099 typeParams, rAngleLoc);
1100}
1101
1102void ASTDeclReader::ReadObjCDefinitionData(
1103 struct ObjCInterfaceDecl::DefinitionData &Data) {
1104 // Read the superclass.
1105 Data.SuperClassTInfo = readTypeSourceInfo();
1106
1107 Data.EndLoc = readSourceLocation();
1108 Data.HasDesignatedInitializers = Record.readInt();
1109
1110 // Read the directly referenced protocols and their SourceLocations.
1111 unsigned NumProtocols = Record.readInt();
1112 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1113 Protocols.reserve(NumProtocols);
1114 for (unsigned I = 0; I != NumProtocols; ++I)
1115 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1116 SmallVector<SourceLocation, 16> ProtoLocs;
1117 ProtoLocs.reserve(NumProtocols);
1118 for (unsigned I = 0; I != NumProtocols; ++I)
1119 ProtoLocs.push_back(readSourceLocation());
1120 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1121 Reader.getContext());
1122
1123 // Read the transitive closure of protocols referenced by this class.
1124 NumProtocols = Record.readInt();
1125 Protocols.clear();
1126 Protocols.reserve(NumProtocols);
1127 for (unsigned I = 0; I != NumProtocols; ++I)
1128 Protocols.push_back(readDeclAs<ObjCProtocolDecl>());
1129 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1130 Reader.getContext());
1131}
1132
1133void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1134 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1135 // FIXME: odr checking?
1136}
1137
1138void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1139 RedeclarableResult Redecl = VisitRedeclarable(ID);
1140 VisitObjCContainerDecl(ID);
1141 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1142 mergeRedeclarable(ID, Redecl);
1143
1144 ID->TypeParamList = ReadObjCTypeParamList();
1145 if (Record.readInt()) {
1146 // Read the definition.
1147 ID->allocateDefinitionData();
1148
1149 ReadObjCDefinitionData(ID->data());
1150 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1151 if (Canon->Data.getPointer()) {
1152 // If we already have a definition, keep the definition invariant and
1153 // merge the data.
1154 MergeDefinitionData(Canon, std::move(ID->data()));
1155 ID->Data = Canon->Data;
1156 } else {
1157 // Set the definition data of the canonical declaration, so other
1158 // redeclarations will see it.
1159 ID->getCanonicalDecl()->Data = ID->Data;
1160
1161 // We will rebuild this list lazily.
1162 ID->setIvarList(nullptr);
1163 }
1164
1165 // Note that we have deserialized a definition.
1166 Reader.PendingDefinitions.insert(ID);
1167
1168 // Note that we've loaded this Objective-C class.
1169 Reader.ObjCClassesLoaded.push_back(ID);
1170 } else {
1171 ID->Data = ID->getCanonicalDecl()->Data;
1172 }
1173}
1174
1175void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1176 VisitFieldDecl(IVD);
1177 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1178 // This field will be built lazily.
1179 IVD->setNextIvar(nullptr);
1180 bool synth = Record.readInt();
1181 IVD->setSynthesize(synth);
1182}
1183
1184void ASTDeclReader::ReadObjCDefinitionData(
1185 struct ObjCProtocolDecl::DefinitionData &Data) {
1186 unsigned NumProtoRefs = Record.readInt();
1187 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1188 ProtoRefs.reserve(NumProtoRefs);
1189 for (unsigned I = 0; I != NumProtoRefs; ++I)
1190 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1191 SmallVector<SourceLocation, 16> ProtoLocs;
1192 ProtoLocs.reserve(NumProtoRefs);
1193 for (unsigned I = 0; I != NumProtoRefs; ++I)
1194 ProtoLocs.push_back(readSourceLocation());
1195 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1196 ProtoLocs.data(), Reader.getContext());
1197}
1198
1199void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1200 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1201 // FIXME: odr checking?
1202}
1203
1204void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1205 RedeclarableResult Redecl = VisitRedeclarable(PD);
1206 VisitObjCContainerDecl(PD);
1207 mergeRedeclarable(PD, Redecl);
1208
1209 if (Record.readInt()) {
1210 // Read the definition.
1211 PD->allocateDefinitionData();
1212
1213 ReadObjCDefinitionData(PD->data());
1214
1215 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1216 if (Canon->Data.getPointer()) {
1217 // If we already have a definition, keep the definition invariant and
1218 // merge the data.
1219 MergeDefinitionData(Canon, std::move(PD->data()));
1220 PD->Data = Canon->Data;
1221 } else {
1222 // Set the definition data of the canonical declaration, so other
1223 // redeclarations will see it.
1224 PD->getCanonicalDecl()->Data = PD->Data;
1225 }
1226 // Note that we have deserialized a definition.
1227 Reader.PendingDefinitions.insert(PD);
1228 } else {
1229 PD->Data = PD->getCanonicalDecl()->Data;
1230 }
1231}
1232
1233void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1234 VisitFieldDecl(FD);
1235}
1236
1237void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1238 VisitObjCContainerDecl(CD);
1239 CD->setCategoryNameLoc(readSourceLocation());
1240 CD->setIvarLBraceLoc(readSourceLocation());
1241 CD->setIvarRBraceLoc(readSourceLocation());
1242
1243 // Note that this category has been deserialized. We do this before
1244 // deserializing the interface declaration, so that it will consider this
1245 /// category.
1246 Reader.CategoriesDeserialized.insert(CD);
1247
1248 CD->ClassInterface = readDeclAs<ObjCInterfaceDecl>();
1249 CD->TypeParamList = ReadObjCTypeParamList();
1250 unsigned NumProtoRefs = Record.readInt();
1251 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1252 ProtoRefs.reserve(NumProtoRefs);
1253 for (unsigned I = 0; I != NumProtoRefs; ++I)
1254 ProtoRefs.push_back(readDeclAs<ObjCProtocolDecl>());
1255 SmallVector<SourceLocation, 16> ProtoLocs;
1256 ProtoLocs.reserve(NumProtoRefs);
1257 for (unsigned I = 0; I != NumProtoRefs; ++I)
1258 ProtoLocs.push_back(readSourceLocation());
1259 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1260 Reader.getContext());
1261
1262 // Protocols in the class extension belong to the class.
1263 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1264 CD->ClassInterface->mergeClassExtensionProtocolList(
1265 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1266 Reader.getContext());
1267}
1268
1269void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1270 VisitNamedDecl(CAD);
1271 CAD->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1272}
1273
1274void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1275 VisitNamedDecl(D);
1276 D->setAtLoc(readSourceLocation());
1277 D->setLParenLoc(readSourceLocation());
1278 QualType T = Record.readType();
1279 TypeSourceInfo *TSI = readTypeSourceInfo();
1280 D->setType(T, TSI);
1281 D->setPropertyAttributes(
1282 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1283 D->setPropertyAttributesAsWritten(
1284 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1285 D->setPropertyImplementation(
1286 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1287 DeclarationName GetterName = Record.readDeclarationName();
1288 SourceLocation GetterLoc = readSourceLocation();
1289 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1290 DeclarationName SetterName = Record.readDeclarationName();
1291 SourceLocation SetterLoc = readSourceLocation();
1292 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1293 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1294 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1295 D->setPropertyIvarDecl(readDeclAs<ObjCIvarDecl>());
1296}
1297
1298void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1299 VisitObjCContainerDecl(D);
1300 D->setClassInterface(readDeclAs<ObjCInterfaceDecl>());
1301}
1302
1303void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1304 VisitObjCImplDecl(D);
1305 D->CategoryNameLoc = readSourceLocation();
1306}
1307
1308void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1309 VisitObjCImplDecl(D);
1310 D->setSuperClass(readDeclAs<ObjCInterfaceDecl>());
1311 D->SuperLoc = readSourceLocation();
1312 D->setIvarLBraceLoc(readSourceLocation());
1313 D->setIvarRBraceLoc(readSourceLocation());
1314 D->setHasNonZeroConstructors(Record.readInt());
1315 D->setHasDestructors(Record.readInt());
1316 D->NumIvarInitializers = Record.readInt();
1317 if (D->NumIvarInitializers)
1318 D->IvarInitializers = ReadGlobalOffset();
1319}
1320
1321void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1322 VisitDecl(D);
1323 D->setAtLoc(readSourceLocation());
1324 D->setPropertyDecl(readDeclAs<ObjCPropertyDecl>());
1325 D->PropertyIvarDecl = readDeclAs<ObjCIvarDecl>();
1326 D->IvarLoc = readSourceLocation();
1327 D->setGetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1328 D->setSetterMethodDecl(readDeclAs<ObjCMethodDecl>());
1329 D->setGetterCXXConstructor(Record.readExpr());
1330 D->setSetterCXXAssignment(Record.readExpr());
1331}
1332
1333void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1334 VisitDeclaratorDecl(FD);
1335 FD->Mutable = Record.readInt();
1336
1337 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1338 FD->InitStorage.setInt(ISK);
1339 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1340 ? Record.readType().getAsOpaquePtr()
1341 : Record.readExpr());
1342 }
1343
1344 if (auto *BW = Record.readExpr())
1345 FD->setBitWidth(BW);
1346
1347 if (!FD->getDeclName()) {
1348 if (auto *Tmpl = readDeclAs<FieldDecl>())
1349 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1350 }
1351 mergeMergeable(FD);
1352}
1353
1354void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1355 VisitDeclaratorDecl(PD);
1356 PD->GetterId = Record.readIdentifier();
1357 PD->SetterId = Record.readIdentifier();
1358}
1359
1360void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1361 VisitValueDecl(FD);
1362
1363 FD->ChainingSize = Record.readInt();
1364 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2")((FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2"
) ? static_cast<void> (0) : __assert_fail ("FD->ChainingSize >= 2 && \"Anonymous chaining must be >= 2\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1364, __PRETTY_FUNCTION__))
;
1365 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1366
1367 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1368 FD->Chaining[I] = readDeclAs<NamedDecl>();
1369
1370 mergeMergeable(FD);
1371}
1372
1373ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1374 RedeclarableResult Redecl = VisitRedeclarable(VD);
1375 VisitDeclaratorDecl(VD);
1376
1377 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1378 VD->VarDeclBits.TSCSpec = Record.readInt();
1379 VD->VarDeclBits.InitStyle = Record.readInt();
1380 VD->VarDeclBits.ARCPseudoStrong = Record.readInt();
1381 if (!isa<ParmVarDecl>(VD)) {
1382 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1383 Record.readInt();
1384 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1385 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1386 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1387 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1388 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1389 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1390 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1391 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1392 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1393 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1394 VD->NonParmVarDeclBits.EscapingByref = Record.readInt();
1395 }
1396 auto VarLinkage = Linkage(Record.readInt());
1397 VD->setCachedLinkage(VarLinkage);
1398
1399 // Reconstruct the one piece of the IdentifierNamespace that we need.
1400 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1401 VD->getLexicalDeclContext()->isFunctionOrMethod())
1402 VD->setLocalExternDecl();
1403
1404 if (uint64_t Val = Record.readInt()) {
1405 VD->setInit(Record.readExpr());
1406 if (Val > 1) {
1407 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1408 Eval->CheckedICE = true;
1409 Eval->IsICE = (Val & 1) != 0;
1410 Eval->HasConstantDestruction = (Val & 4) != 0;
1411 }
1412 }
1413
1414 if (VD->hasAttr<BlocksAttr>() && VD->getType()->getAsCXXRecordDecl()) {
1415 Expr *CopyExpr = Record.readExpr();
1416 if (CopyExpr)
1417 Reader.getContext().setBlockVarCopyInit(VD, CopyExpr, Record.readInt());
1418 }
1419
1420 if (VD->getStorageDuration() == SD_Static && Record.readInt())
1421 Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1422
1423 enum VarKind {
1424 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1425 };
1426 switch ((VarKind)Record.readInt()) {
1427 case VarNotTemplate:
1428 // Only true variables (not parameters or implicit parameters) can be
1429 // merged; the other kinds are not really redeclarable at all.
1430 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1431 !isa<VarTemplateSpecializationDecl>(VD))
1432 mergeRedeclarable(VD, Redecl);
1433 break;
1434 case VarTemplate:
1435 // Merged when we merge the template.
1436 VD->setDescribedVarTemplate(readDeclAs<VarTemplateDecl>());
1437 break;
1438 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1439 auto *Tmpl = readDeclAs<VarDecl>();
1440 auto TSK = (TemplateSpecializationKind)Record.readInt();
1441 SourceLocation POI = readSourceLocation();
1442 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1443 mergeRedeclarable(VD, Redecl);
1444 break;
1445 }
1446 }
1447
1448 return Redecl;
1449}
1450
1451void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1452 VisitVarDecl(PD);
1453}
1454
1455void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1456 VisitVarDecl(PD);
1457 unsigned isObjCMethodParam = Record.readInt();
1458 unsigned scopeDepth = Record.readInt();
1459 unsigned scopeIndex = Record.readInt();
1460 unsigned declQualifier = Record.readInt();
1461 if (isObjCMethodParam) {
1462 assert(scopeDepth == 0)((scopeDepth == 0) ? static_cast<void> (0) : __assert_fail
("scopeDepth == 0", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1462, __PRETTY_FUNCTION__))
;
1463 PD->setObjCMethodScopeInfo(scopeIndex);
1464 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1465 } else {
1466 PD->setScopeInfo(scopeDepth, scopeIndex);
1467 }
1468 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1469 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1470 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1471 PD->setUninstantiatedDefaultArg(Record.readExpr());
1472
1473 // FIXME: If this is a redeclaration of a function from another module, handle
1474 // inheritance of default arguments.
1475}
1476
1477void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1478 VisitVarDecl(DD);
1479 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1480 for (unsigned I = 0; I != DD->NumBindings; ++I) {
1481 BDs[I] = readDeclAs<BindingDecl>();
1482 BDs[I]->setDecomposedDecl(DD);
1483 }
1484}
1485
1486void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1487 VisitValueDecl(BD);
1488 BD->Binding = Record.readExpr();
1489}
1490
1491void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1492 VisitDecl(AD);
1493 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1494 AD->setRParenLoc(readSourceLocation());
1495}
1496
1497void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1498 VisitDecl(BD);
1499 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1500 BD->setSignatureAsWritten(readTypeSourceInfo());
1501 unsigned NumParams = Record.readInt();
1502 SmallVector<ParmVarDecl *, 16> Params;
1503 Params.reserve(NumParams);
1504 for (unsigned I = 0; I != NumParams; ++I)
1505 Params.push_back(readDeclAs<ParmVarDecl>());
1506 BD->setParams(Params);
1507
1508 BD->setIsVariadic(Record.readInt());
1509 BD->setBlockMissingReturnType(Record.readInt());
1510 BD->setIsConversionFromLambda(Record.readInt());
1511 BD->setDoesNotEscape(Record.readInt());
1512 BD->setCanAvoidCopyToHeap(Record.readInt());
1513
1514 bool capturesCXXThis = Record.readInt();
1515 unsigned numCaptures = Record.readInt();
1516 SmallVector<BlockDecl::Capture, 16> captures;
1517 captures.reserve(numCaptures);
1518 for (unsigned i = 0; i != numCaptures; ++i) {
1519 auto *decl = readDeclAs<VarDecl>();
1520 unsigned flags = Record.readInt();
1521 bool byRef = (flags & 1);
1522 bool nested = (flags & 2);
1523 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1524
1525 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1526 }
1527 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1528}
1529
1530void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1531 VisitDecl(CD);
1532 unsigned ContextParamPos = Record.readInt();
1533 CD->setNothrow(Record.readInt() != 0);
1534 // Body is set by VisitCapturedStmt.
1535 for (unsigned I = 0; I < CD->NumParams; ++I) {
1536 if (I != ContextParamPos)
1537 CD->setParam(I, readDeclAs<ImplicitParamDecl>());
1538 else
1539 CD->setContextParam(I, readDeclAs<ImplicitParamDecl>());
1540 }
1541}
1542
1543void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1544 VisitDecl(D);
1545 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1546 D->setExternLoc(readSourceLocation());
1547 D->setRBraceLoc(readSourceLocation());
1548}
1549
1550void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1551 VisitDecl(D);
1552 D->RBraceLoc = readSourceLocation();
1553}
1554
1555void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1556 VisitNamedDecl(D);
1557 D->setLocStart(readSourceLocation());
1558}
1559
1560void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1561 RedeclarableResult Redecl = VisitRedeclarable(D);
1562 VisitNamedDecl(D);
1563 D->setInline(Record.readInt());
1564 D->LocStart = readSourceLocation();
1565 D->RBraceLoc = readSourceLocation();
1566
1567 // Defer loading the anonymous namespace until we've finished merging
1568 // this namespace; loading it might load a later declaration of the
1569 // same namespace, and we have an invariant that older declarations
1570 // get merged before newer ones try to merge.
1571 GlobalDeclID AnonNamespace = 0;
1572 if (Redecl.getFirstID() == ThisDeclID) {
1573 AnonNamespace = readDeclID();
1574 } else {
1575 // Link this namespace back to the first declaration, which has already
1576 // been deserialized.
1577 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1578 }
1579
1580 mergeRedeclarable(D, Redecl);
1581
1582 if (AnonNamespace) {
1583 // Each module has its own anonymous namespace, which is disjoint from
1584 // any other module's anonymous namespaces, so don't attach the anonymous
1585 // namespace at all.
1586 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1587 if (!Record.isModule())
1588 D->setAnonymousNamespace(Anon);
1589 }
1590}
1591
1592void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1593 RedeclarableResult Redecl = VisitRedeclarable(D);
1594 VisitNamedDecl(D);
1595 D->NamespaceLoc = readSourceLocation();
1596 D->IdentLoc = readSourceLocation();
1597 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1598 D->Namespace = readDeclAs<NamedDecl>();
1599 mergeRedeclarable(D, Redecl);
1600}
1601
1602void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1603 VisitNamedDecl(D);
1604 D->setUsingLoc(readSourceLocation());
1605 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1606 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1607 D->FirstUsingShadow.setPointer(readDeclAs<UsingShadowDecl>());
1608 D->setTypename(Record.readInt());
1609 if (auto *Pattern = readDeclAs<NamedDecl>())
1610 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1611 mergeMergeable(D);
1612}
1613
1614void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1615 VisitNamedDecl(D);
1616 D->InstantiatedFrom = readDeclAs<NamedDecl>();
1617 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1618 for (unsigned I = 0; I != D->NumExpansions; ++I)
1619 Expansions[I] = readDeclAs<NamedDecl>();
1620 mergeMergeable(D);
1621}
1622
1623void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1624 RedeclarableResult Redecl = VisitRedeclarable(D);
1625 VisitNamedDecl(D);
1626 D->Underlying = readDeclAs<NamedDecl>();
1627 D->IdentifierNamespace = Record.readInt();
1628 D->UsingOrNextShadow = readDeclAs<NamedDecl>();
1629 auto *Pattern = readDeclAs<UsingShadowDecl>();
1630 if (Pattern)
1631 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1632 mergeRedeclarable(D, Redecl);
1633}
1634
1635void ASTDeclReader::VisitConstructorUsingShadowDecl(
1636 ConstructorUsingShadowDecl *D) {
1637 VisitUsingShadowDecl(D);
1638 D->NominatedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1639 D->ConstructedBaseClassShadowDecl = readDeclAs<ConstructorUsingShadowDecl>();
1640 D->IsVirtual = Record.readInt();
1641}
1642
1643void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1644 VisitNamedDecl(D);
1645 D->UsingLoc = readSourceLocation();
1646 D->NamespaceLoc = readSourceLocation();
1647 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1648 D->NominatedNamespace = readDeclAs<NamedDecl>();
1649 D->CommonAncestor = readDeclAs<DeclContext>();
1650}
1651
1652void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1653 VisitValueDecl(D);
1654 D->setUsingLoc(readSourceLocation());
1655 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1656 D->DNLoc = Record.readDeclarationNameLoc(D->getDeclName());
1657 D->EllipsisLoc = readSourceLocation();
1658 mergeMergeable(D);
1659}
1660
1661void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1662 UnresolvedUsingTypenameDecl *D) {
1663 VisitTypeDecl(D);
1664 D->TypenameLocation = readSourceLocation();
1665 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1666 D->EllipsisLoc = readSourceLocation();
1667 mergeMergeable(D);
1668}
1669
1670void ASTDeclReader::ReadCXXDefinitionData(
1671 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1672 #define FIELD(Name, Width, Merge) \
1673 Data.Name = Record.readInt();
1674 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1675
1676 // Note: the caller has deserialized the IsLambda bit already.
1677 Data.ODRHash = Record.readInt();
1678 Data.HasODRHash = true;
1679
1680 if (Record.readInt())
1681 Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1682
1683 Data.NumBases = Record.readInt();
1684 if (Data.NumBases)
1685 Data.Bases = ReadGlobalOffset();
1686 Data.NumVBases = Record.readInt();
1687 if (Data.NumVBases)
1688 Data.VBases = ReadGlobalOffset();
1689
1690 Record.readUnresolvedSet(Data.Conversions);
1691 Data.ComputedVisibleConversions = Record.readInt();
1692 if (Data.ComputedVisibleConversions)
1693 Record.readUnresolvedSet(Data.VisibleConversions);
1694 assert(Data.Definition && "Data.Definition should be already set!")((Data.Definition && "Data.Definition should be already set!"
) ? static_cast<void> (0) : __assert_fail ("Data.Definition && \"Data.Definition should be already set!\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1694, __PRETTY_FUNCTION__))
;
1695 Data.FirstFriend = readDeclID();
1696
1697 if (Data.IsLambda) {
1698 using Capture = LambdaCapture;
1699
1700 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1701 Lambda.Dependent = Record.readInt();
1702 Lambda.IsGenericLambda = Record.readInt();
1703 Lambda.CaptureDefault = Record.readInt();
1704 Lambda.NumCaptures = Record.readInt();
1705 Lambda.NumExplicitCaptures = Record.readInt();
1706 Lambda.HasKnownInternalLinkage = Record.readInt();
1707 Lambda.ManglingNumber = Record.readInt();
1708 Lambda.ContextDecl = readDeclID();
1709 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1710 sizeof(Capture) * Lambda.NumCaptures);
1711 Capture *ToCapture = Lambda.Captures;
1712 Lambda.MethodTyInfo = readTypeSourceInfo();
1713 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1714 SourceLocation Loc = readSourceLocation();
1715 bool IsImplicit = Record.readInt();
1716 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1717 switch (Kind) {
1718 case LCK_StarThis:
1719 case LCK_This:
1720 case LCK_VLAType:
1721 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1722 break;
1723 case LCK_ByCopy:
1724 case LCK_ByRef:
1725 auto *Var = readDeclAs<VarDecl>();
1726 SourceLocation EllipsisLoc = readSourceLocation();
1727 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1728 break;
1729 }
1730 }
1731 }
1732}
1733
1734void ASTDeclReader::MergeDefinitionData(
1735 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1736 assert(D->DefinitionData &&((D->DefinitionData && "merging class definition into non-definition"
) ? static_cast<void> (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1737, __PRETTY_FUNCTION__))
1737 "merging class definition into non-definition")((D->DefinitionData && "merging class definition into non-definition"
) ? static_cast<void> (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1737, __PRETTY_FUNCTION__))
;
1738 auto &DD = *D->DefinitionData;
1739
1740 if (DD.Definition != MergeDD.Definition) {
1741 // Track that we merged the definitions.
1742 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1743 DD.Definition));
1744 Reader.PendingDefinitions.erase(MergeDD.Definition);
1745 MergeDD.Definition->setCompleteDefinition(false);
1746 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1747 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&((Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end
() && "already loaded pending lookups for merged definition"
) ? static_cast<void> (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1748, __PRETTY_FUNCTION__))
1748 "already loaded pending lookups for merged definition")((Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end
() && "already loaded pending lookups for merged definition"
) ? static_cast<void> (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1748, __PRETTY_FUNCTION__))
;
1749 }
1750
1751 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1752 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1753 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1754 // We faked up this definition data because we found a class for which we'd
1755 // not yet loaded the definition. Replace it with the real thing now.
1756 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?")((!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?"
) ? static_cast<void> (0) : __assert_fail ("!DD.IsLambda && !MergeDD.IsLambda && \"faked up lambda definition?\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1756, __PRETTY_FUNCTION__))
;
1757 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1758
1759 // Don't change which declaration is the definition; that is required
1760 // to be invariant once we select it.
1761 auto *Def = DD.Definition;
1762 DD = std::move(MergeDD);
1763 DD.Definition = Def;
1764 return;
1765 }
1766
1767 bool DetectedOdrViolation = false;
1768
1769 #define FIELD(Name, Width, Merge) Merge(Name)
1770 #define MERGE_OR(Field) DD.Field |= MergeDD.Field;
1771 #define NO_MERGE(Field) \
1772 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1773 MERGE_OR(Field)
1774 #include "clang/AST/CXXRecordDeclDefinitionBits.def"
1775 NO_MERGE(IsLambda)
1776 #undef NO_MERGE
1777 #undef MERGE_OR
1778
1779 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1780 DetectedOdrViolation = true;
1781 // FIXME: Issue a diagnostic if the base classes don't match when we come
1782 // to lazily load them.
1783
1784 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1785 // match when we come to lazily load them.
1786 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1787 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1788 DD.ComputedVisibleConversions = true;
1789 }
1790
1791 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1792 // lazily load it.
1793
1794 if (DD.IsLambda) {
1795 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1796 // when they occur within the body of a function template specialization).
1797 }
1798
1799 if (D->getODRHash() != MergeDD.ODRHash) {
1800 DetectedOdrViolation = true;
1801 }
1802
1803 if (DetectedOdrViolation)
1804 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1805 {MergeDD.Definition, &MergeDD});
1806}
1807
1808void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1809 struct CXXRecordDecl::DefinitionData *DD;
1810 ASTContext &C = Reader.getContext();
1811
1812 // Determine whether this is a lambda closure type, so that we can
1813 // allocate the appropriate DefinitionData structure.
1814 bool IsLambda = Record.readInt();
1815 if (IsLambda)
1816 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1817 LCD_None);
1818 else
1819 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1820
1821 CXXRecordDecl *Canon = D->getCanonicalDecl();
1822 // Set decl definition data before reading it, so that during deserialization
1823 // when we read CXXRecordDecl, it already has definition data and we don't
1824 // set fake one.
1825 if (!Canon->DefinitionData)
1826 Canon->DefinitionData = DD;
1827 D->DefinitionData = Canon->DefinitionData;
1828 ReadCXXDefinitionData(*DD, D);
1829
1830 // We might already have a different definition for this record. This can
1831 // happen either because we're reading an update record, or because we've
1832 // already done some merging. Either way, just merge into it.
1833 if (Canon->DefinitionData != DD) {
1834 MergeDefinitionData(Canon, std::move(*DD));
1835 return;
1836 }
1837
1838 // Mark this declaration as being a definition.
1839 D->setCompleteDefinition(true);
1840
1841 // If this is not the first declaration or is an update record, we can have
1842 // other redeclarations already. Make a note that we need to propagate the
1843 // DefinitionData pointer onto them.
1844 if (Update || Canon != D)
1845 Reader.PendingDefinitions.insert(D);
1846}
1847
1848ASTDeclReader::RedeclarableResult
1849ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1850 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1851
1852 ASTContext &C = Reader.getContext();
1853
1854 enum CXXRecKind {
1855 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1856 };
1857 switch ((CXXRecKind)Record.readInt()) {
1858 case CXXRecNotTemplate:
1859 // Merged when we merge the folding set entry in the primary template.
1860 if (!isa<ClassTemplateSpecializationDecl>(D))
1861 mergeRedeclarable(D, Redecl);
1862 break;
1863 case CXXRecTemplate: {
1864 // Merged when we merge the template.
1865 auto *Template = readDeclAs<ClassTemplateDecl>();
1866 D->TemplateOrInstantiation = Template;
1867 if (!Template->getTemplatedDecl()) {
1868 // We've not actually loaded the ClassTemplateDecl yet, because we're
1869 // currently being loaded as its pattern. Rely on it to set up our
1870 // TypeForDecl (see VisitClassTemplateDecl).
1871 //
1872 // Beware: we do not yet know our canonical declaration, and may still
1873 // get merged once the surrounding class template has got off the ground.
1874 DeferredTypeID = 0;
1875 }
1876 break;
1877 }
1878 case CXXRecMemberSpecialization: {
1879 auto *RD = readDeclAs<CXXRecordDecl>();
1880 auto TSK = (TemplateSpecializationKind)Record.readInt();
1881 SourceLocation POI = readSourceLocation();
1882 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1883 MSI->setPointOfInstantiation(POI);
1884 D->TemplateOrInstantiation = MSI;
1885 mergeRedeclarable(D, Redecl);
1886 break;
1887 }
1888 }
1889
1890 bool WasDefinition = Record.readInt();
1891 if (WasDefinition)
1892 ReadCXXRecordDefinition(D, /*Update*/false);
1893 else
1894 // Propagate DefinitionData pointer from the canonical declaration.
1895 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1896
1897 // Lazily load the key function to avoid deserializing every method so we can
1898 // compute it.
1899 if (WasDefinition) {
1900 DeclID KeyFn = readDeclID();
1901 if (KeyFn && D->isCompleteDefinition())
1902 // FIXME: This is wrong for the ARM ABI, where some other module may have
1903 // made this function no longer be a key function. We need an update
1904 // record or similar for that case.
1905 C.KeyFunctions[D] = KeyFn;
1906 }
1907
1908 return Redecl;
1909}
1910
1911void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1912 D->setExplicitSpecifier(Record.readExplicitSpec());
1913 VisitFunctionDecl(D);
1914 D->setIsCopyDeductionCandidate(Record.readInt());
1915}
1916
1917void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1918 VisitFunctionDecl(D);
1919
1920 unsigned NumOverridenMethods = Record.readInt();
1921 if (D->isCanonicalDecl()) {
1922 while (NumOverridenMethods--) {
1923 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1924 // MD may be initializing.
1925 if (auto *MD = readDeclAs<CXXMethodDecl>())
1926 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1927 }
1928 } else {
1929 // We don't care about which declarations this used to override; we get
1930 // the relevant information from the canonical declaration.
1931 Record.skipInts(NumOverridenMethods);
1932 }
1933}
1934
1935void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1936 // We need the inherited constructor information to merge the declaration,
1937 // so we have to read it before we call VisitCXXMethodDecl.
1938 D->setExplicitSpecifier(Record.readExplicitSpec());
1939 if (D->isInheritingConstructor()) {
1940 auto *Shadow = readDeclAs<ConstructorUsingShadowDecl>();
1941 auto *Ctor = readDeclAs<CXXConstructorDecl>();
1942 *D->getTrailingObjects<InheritedConstructor>() =
1943 InheritedConstructor(Shadow, Ctor);
1944 }
1945
1946 VisitCXXMethodDecl(D);
1947}
1948
1949void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1950 VisitCXXMethodDecl(D);
1951
1952 if (auto *OperatorDelete = readDeclAs<FunctionDecl>()) {
1953 CXXDestructorDecl *Canon = D->getCanonicalDecl();
1954 auto *ThisArg = Record.readExpr();
1955 // FIXME: Check consistency if we have an old and new operator delete.
1956 if (!Canon->OperatorDelete) {
1957 Canon->OperatorDelete = OperatorDelete;
1958 Canon->OperatorDeleteThisArg = ThisArg;
1959 }
1960 }
1961}
1962
1963void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
1964 D->setExplicitSpecifier(Record.readExplicitSpec());
1965 VisitCXXMethodDecl(D);
1966}
1967
1968void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
1969 VisitDecl(D);
1970 D->ImportedAndComplete.setPointer(readModule());
1971 D->ImportedAndComplete.setInt(Record.readInt());
1972 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
1973 for (unsigned I = 0, N = Record.back(); I != N; ++I)
1974 StoredLocs[I] = readSourceLocation();
1975 Record.skipInts(1); // The number of stored source locations.
1976}
1977
1978void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
1979 VisitDecl(D);
1980 D->setColonLoc(readSourceLocation());
1981}
1982
1983void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
1984 VisitDecl(D);
1985 if (Record.readInt()) // hasFriendDecl
1986 D->Friend = readDeclAs<NamedDecl>();
1987 else
1988 D->Friend = readTypeSourceInfo();
1989 for (unsigned i = 0; i != D->NumTPLists; ++i)
1990 D->getTrailingObjects<TemplateParameterList *>()[i] =
1991 Record.readTemplateParameterList();
1992 D->NextFriend = readDeclID();
1993 D->UnsupportedFriend = (Record.readInt() != 0);
1994 D->FriendLoc = readSourceLocation();
1995}
1996
1997void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1998 VisitDecl(D);
1999 unsigned NumParams = Record.readInt();
2000 D->NumParams = NumParams;
2001 D->Params = new TemplateParameterList*[NumParams];
2002 for (unsigned i = 0; i != NumParams; ++i)
2003 D->Params[i] = Record.readTemplateParameterList();
2004 if (Record.readInt()) // HasFriendDecl
2005 D->Friend = readDeclAs<NamedDecl>();
2006 else
2007 D->Friend = readTypeSourceInfo();
2008 D->FriendLoc = readSourceLocation();
2009}
2010
2011DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2012 VisitNamedDecl(D);
2013
2014 DeclID PatternID = readDeclID();
2015 auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2016 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2017 D->init(TemplatedDecl, TemplateParams);
2018
2019 return PatternID;
2020}
2021
2022void ASTDeclReader::VisitConceptDecl(ConceptDecl *D) {
2023 VisitTemplateDecl(D);
2024 D->ConstraintExpr = Record.readExpr();
2025 mergeMergeable(D);
2026}
2027
2028ASTDeclReader::RedeclarableResult
2029ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2030 RedeclarableResult Redecl = VisitRedeclarable(D);
2031
2032 // Make sure we've allocated the Common pointer first. We do this before
2033 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2034 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2035 if (!CanonD->Common) {
2036 CanonD->Common = CanonD->newCommon(Reader.getContext());
2037 Reader.PendingDefinitions.insert(CanonD);
2038 }
2039 D->Common = CanonD->Common;
2040
2041 // If this is the first declaration of the template, fill in the information
2042 // for the 'common' pointer.
2043 if (ThisDeclID == Redecl.getFirstID()) {
2044 if (auto *RTD = readDeclAs<RedeclarableTemplateDecl>()) {
2045 assert(RTD->getKind() == D->getKind() &&((RTD->getKind() == D->getKind() && "InstantiatedFromMemberTemplate kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2046, __PRETTY_FUNCTION__))
2046 "InstantiatedFromMemberTemplate kind mismatch")((RTD->getKind() == D->getKind() && "InstantiatedFromMemberTemplate kind mismatch"
) ? static_cast<void> (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2046, __PRETTY_FUNCTION__))
;
2047 D->setInstantiatedFromMemberTemplate(RTD);
2048 if (Record.readInt())
2049 D->setMemberSpecialization();
2050 }
2051 }
2052
2053 DeclID PatternID = VisitTemplateDecl(D);
2054 D->IdentifierNamespace = Record.readInt();
2055
2056 mergeRedeclarable(D, Redecl, PatternID);
2057
2058 // If we merged the template with a prior declaration chain, merge the common
2059 // pointer.
2060 // FIXME: Actually merge here, don't just overwrite.
2061 D->Common = D->getCanonicalDecl()->Common;
2062
2063 return Redecl;
2064}
2065
2066void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2067 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2068
2069 if (ThisDeclID == Redecl.getFirstID()) {
2070 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2071 // the specializations.
2072 SmallVector<serialization::DeclID, 32> SpecIDs;
2073 readDeclIDList(SpecIDs);
2074 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2075 }
2076
2077 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2078 // We were loaded before our templated declaration was. We've not set up
2079 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2080 // it now.
2081 Reader.getContext().getInjectedClassNameType(
2082 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2083 }
2084}
2085
2086void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2087 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2087)
;
2088}
2089
2090/// TODO: Unify with ClassTemplateDecl version?
2091/// May require unifying ClassTemplateDecl and
2092/// VarTemplateDecl beyond TemplateDecl...
2093void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2094 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2095
2096 if (ThisDeclID == Redecl.getFirstID()) {
2097 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2098 // the specializations.
2099 SmallVector<serialization::DeclID, 32> SpecIDs;
2100 readDeclIDList(SpecIDs);
2101 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2102 }
2103}
2104
2105ASTDeclReader::RedeclarableResult
2106ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2107 ClassTemplateSpecializationDecl *D) {
2108 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2109
2110 ASTContext &C = Reader.getContext();
2111 if (Decl *InstD = readDecl()) {
2112 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2113 D->SpecializedTemplate = CTD;
2114 } else {
2115 SmallVector<TemplateArgument, 8> TemplArgs;
2116 Record.readTemplateArgumentList(TemplArgs);
2117 TemplateArgumentList *ArgList
2118 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2119 auto *PS =
2120 new (C) ClassTemplateSpecializationDecl::
2121 SpecializedPartialSpecialization();
2122 PS->PartialSpecialization
2123 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2124 PS->TemplateArgs = ArgList;
2125 D->SpecializedTemplate = PS;
2126 }
2127 }
2128
2129 SmallVector<TemplateArgument, 8> TemplArgs;
2130 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2131 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2132 D->PointOfInstantiation = readSourceLocation();
2133 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2134
2135 bool writtenAsCanonicalDecl = Record.readInt();
2136 if (writtenAsCanonicalDecl) {
2137 auto *CanonPattern = readDeclAs<ClassTemplateDecl>();
2138 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2139 // Set this as, or find, the canonical declaration for this specialization
2140 ClassTemplateSpecializationDecl *CanonSpec;
2141 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2142 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2143 .GetOrInsertNode(Partial);
2144 } else {
2145 CanonSpec =
2146 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2147 }
2148 // If there was already a canonical specialization, merge into it.
2149 if (CanonSpec != D) {
2150 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2151
2152 // This declaration might be a definition. Merge with any existing
2153 // definition.
2154 if (auto *DDD = D->DefinitionData) {
2155 if (CanonSpec->DefinitionData)
2156 MergeDefinitionData(CanonSpec, std::move(*DDD));
2157 else
2158 CanonSpec->DefinitionData = D->DefinitionData;
2159 }
2160 D->DefinitionData = CanonSpec->DefinitionData;
2161 }
2162 }
2163 }
2164
2165 // Explicit info.
2166 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2167 auto *ExplicitInfo =
2168 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2169 ExplicitInfo->TypeAsWritten = TyInfo;
2170 ExplicitInfo->ExternLoc = readSourceLocation();
2171 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2172 D->ExplicitInfo = ExplicitInfo;
2173 }
2174
2175 return Redecl;
2176}
2177
2178void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2179 ClassTemplatePartialSpecializationDecl *D) {
2180 // We need to read the template params first because redeclarable is going to
2181 // need them for profiling
2182 TemplateParameterList *Params = Record.readTemplateParameterList();
2183 D->TemplateParams = Params;
2184 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2185
2186 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2187
2188 // These are read/set from/to the first declaration.
2189 if (ThisDeclID == Redecl.getFirstID()) {
2190 D->InstantiatedFromMember.setPointer(
2191 readDeclAs<ClassTemplatePartialSpecializationDecl>());
2192 D->InstantiatedFromMember.setInt(Record.readInt());
2193 }
2194}
2195
2196void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2197 ClassScopeFunctionSpecializationDecl *D) {
2198 VisitDecl(D);
2199 D->Specialization = readDeclAs<CXXMethodDecl>();
2200 if (Record.readInt())
2201 D->TemplateArgs = Record.readASTTemplateArgumentListInfo();
2202}
2203
2204void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2205 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2206
2207 if (ThisDeclID == Redecl.getFirstID()) {
2208 // This FunctionTemplateDecl owns a CommonPtr; read it.
2209 SmallVector<serialization::DeclID, 32> SpecIDs;
2210 readDeclIDList(SpecIDs);
2211 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2212 }
2213}
2214
2215/// TODO: Unify with ClassTemplateSpecializationDecl version?
2216/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2217/// VarTemplate(Partial)SpecializationDecl with a new data
2218/// structure Template(Partial)SpecializationDecl, and
2219/// using Template(Partial)SpecializationDecl as input type.
2220ASTDeclReader::RedeclarableResult
2221ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2222 VarTemplateSpecializationDecl *D) {
2223 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2224
2225 ASTContext &C = Reader.getContext();
2226 if (Decl *InstD = readDecl()) {
2227 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2228 D->SpecializedTemplate = VTD;
2229 } else {
2230 SmallVector<TemplateArgument, 8> TemplArgs;
2231 Record.readTemplateArgumentList(TemplArgs);
2232 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2233 C, TemplArgs);
2234 auto *PS =
2235 new (C)
2236 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2237 PS->PartialSpecialization =
2238 cast<VarTemplatePartialSpecializationDecl>(InstD);
2239 PS->TemplateArgs = ArgList;
2240 D->SpecializedTemplate = PS;
2241 }
2242 }
2243
2244 // Explicit info.
2245 if (TypeSourceInfo *TyInfo = readTypeSourceInfo()) {
2246 auto *ExplicitInfo =
2247 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2248 ExplicitInfo->TypeAsWritten = TyInfo;
2249 ExplicitInfo->ExternLoc = readSourceLocation();
2250 ExplicitInfo->TemplateKeywordLoc = readSourceLocation();
2251 D->ExplicitInfo = ExplicitInfo;
2252 }
2253
2254 SmallVector<TemplateArgument, 8> TemplArgs;
2255 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2256 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2257 D->PointOfInstantiation = readSourceLocation();
2258 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2259 D->IsCompleteDefinition = Record.readInt();
2260
2261 bool writtenAsCanonicalDecl = Record.readInt();
2262 if (writtenAsCanonicalDecl) {
2263 auto *CanonPattern = readDeclAs<VarTemplateDecl>();
2264 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2265 // FIXME: If it's already present, merge it.
2266 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2267 CanonPattern->getCommonPtr()->PartialSpecializations
2268 .GetOrInsertNode(Partial);
2269 } else {
2270 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2271 }
2272 }
2273 }
2274
2275 return Redecl;
2276}
2277
2278/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2279/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2280/// VarTemplate(Partial)SpecializationDecl with a new data
2281/// structure Template(Partial)SpecializationDecl, and
2282/// using Template(Partial)SpecializationDecl as input type.
2283void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2284 VarTemplatePartialSpecializationDecl *D) {
2285 TemplateParameterList *Params = Record.readTemplateParameterList();
2286 D->TemplateParams = Params;
2287 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2288
2289 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2290
2291 // These are read/set from/to the first declaration.
2292 if (ThisDeclID == Redecl.getFirstID()) {
2293 D->InstantiatedFromMember.setPointer(
2294 readDeclAs<VarTemplatePartialSpecializationDecl>());
2295 D->InstantiatedFromMember.setInt(Record.readInt());
2296 }
2297}
2298
2299void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2300 VisitTypeDecl(D);
2301
2302 D->setDeclaredWithTypename(Record.readInt());
2303
2304 // TODO: Concepts: Immediately introduced constraint
2305 if (Record.readInt())
2306 D->setDefaultArgument(readTypeSourceInfo());
2307}
2308
2309void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2310 VisitDeclaratorDecl(D);
2311 // TemplateParmPosition.
2312 D->setDepth(Record.readInt());
2313 D->setPosition(Record.readInt());
2314 if (D->isExpandedParameterPack()) {
2315 auto TypesAndInfos =
2316 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2317 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2318 new (&TypesAndInfos[I].first) QualType(Record.readType());
2319 TypesAndInfos[I].second = readTypeSourceInfo();
2320 }
2321 } else {
2322 // Rest of NonTypeTemplateParmDecl.
2323 D->ParameterPack = Record.readInt();
2324 if (Record.readInt())
2325 D->setDefaultArgument(Record.readExpr());
2326 }
2327}
2328
2329void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2330 VisitTemplateDecl(D);
2331 // TemplateParmPosition.
2332 D->setDepth(Record.readInt());
2333 D->setPosition(Record.readInt());
2334 if (D->isExpandedParameterPack()) {
2335 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2336 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2337 I != N; ++I)
2338 Data[I] = Record.readTemplateParameterList();
2339 } else {
2340 // Rest of TemplateTemplateParmDecl.
2341 D->ParameterPack = Record.readInt();
2342 if (Record.readInt())
2343 D->setDefaultArgument(Reader.getContext(),
2344 Record.readTemplateArgumentLoc());
2345 }
2346}
2347
2348void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2349 VisitRedeclarableTemplateDecl(D);
2350}
2351
2352void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2353 VisitDecl(D);
2354 D->AssertExprAndFailed.setPointer(Record.readExpr());
2355 D->AssertExprAndFailed.setInt(Record.readInt());
2356 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2357 D->RParenLoc = readSourceLocation();
2358}
2359
2360void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2361 VisitDecl(D);
2362}
2363
2364void ASTDeclReader::VisitLifetimeExtendedTemporaryDecl(
2365 LifetimeExtendedTemporaryDecl *D) {
2366 VisitDecl(D);
2367 D->ExtendingDecl = readDeclAs<ValueDecl>();
2368 D->ExprWithTemporary = Record.readStmt();
2369 if (Record.readInt())
2370 D->Value = new (D->getASTContext()) APValue(Record.readAPValue());
2371 D->ManglingNumber = Record.readInt();
2372 mergeMergeable(D);
2373}
2374
2375std::pair<uint64_t, uint64_t>
2376ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2377 uint64_t LexicalOffset = ReadLocalOffset();
2378 uint64_t VisibleOffset = ReadLocalOffset();
2379 return std::make_pair(LexicalOffset, VisibleOffset);
2380}
2381
2382template <typename T>
2383ASTDeclReader::RedeclarableResult
2384ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2385 DeclID FirstDeclID = readDeclID();
2386 Decl *MergeWith = nullptr;
2387
2388 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2389 bool IsFirstLocalDecl = false;
2390
2391 uint64_t RedeclOffset = 0;
2392
2393 // 0 indicates that this declaration was the only declaration of its entity,
2394 // and is used for space optimization.
2395 if (FirstDeclID == 0) {
2396 FirstDeclID = ThisDeclID;
2397 IsKeyDecl = true;
2398 IsFirstLocalDecl = true;
2399 } else if (unsigned N = Record.readInt()) {
2400 // This declaration was the first local declaration, but may have imported
2401 // other declarations.
2402 IsKeyDecl = N == 1;
2403 IsFirstLocalDecl = true;
2404
2405 // We have some declarations that must be before us in our redeclaration
2406 // chain. Read them now, and remember that we ought to merge with one of
2407 // them.
2408 // FIXME: Provide a known merge target to the second and subsequent such
2409 // declaration.
2410 for (unsigned I = 0; I != N - 1; ++I)
2411 MergeWith = readDecl();
2412
2413 RedeclOffset = ReadLocalOffset();
2414 } else {
2415 // This declaration was not the first local declaration. Read the first
2416 // local declaration now, to trigger the import of other redeclarations.
2417 (void)readDecl();
2418 }
2419
2420 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2421 if (FirstDecl != D) {
2422 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2423 // We temporarily set the first (canonical) declaration as the previous one
2424 // which is the one that matters and mark the real previous DeclID to be
2425 // loaded & attached later on.
2426 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2427 D->First = FirstDecl->getCanonicalDecl();
2428 }
2429
2430 auto *DAsT = static_cast<T *>(D);
2431
2432 // Note that we need to load local redeclarations of this decl and build a
2433 // decl chain for them. This must happen *after* we perform the preloading
2434 // above; this ensures that the redeclaration chain is built in the correct
2435 // order.
2436 if (IsFirstLocalDecl)
2437 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2438
2439 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2440}
2441
2442/// Attempts to merge the given declaration (D) with another declaration
2443/// of the same entity.
2444template<typename T>
2445void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2446 RedeclarableResult &Redecl,
2447 DeclID TemplatePatternID) {
2448 // If modules are not available, there is no reason to perform this merge.
2449 if (!Reader.getContext().getLangOpts().Modules)
2450 return;
2451
2452 // If we're not the canonical declaration, we don't need to merge.
2453 if (!DBase->isFirstDecl())
2454 return;
2455
2456 auto *D = static_cast<T *>(DBase);
2457
2458 if (auto *Existing = Redecl.getKnownMergeTarget())
2459 // We already know of an existing declaration we should merge with.
2460 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2461 else if (FindExistingResult ExistingRes = findExisting(D))
2462 if (T *Existing = ExistingRes)
2463 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2464}
2465
2466/// "Cast" to type T, asserting if we don't have an implicit conversion.
2467/// We use this to put code in a template that will only be valid for certain
2468/// instantiations.
2469template<typename T> static T assert_cast(T t) { return t; }
2470template<typename T> static T assert_cast(...) {
2471 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2471)
;
2472}
2473
2474/// Merge together the pattern declarations from two template
2475/// declarations.
2476void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2477 RedeclarableTemplateDecl *Existing,
2478 DeclID DsID, bool IsKeyDecl) {
2479 auto *DPattern = D->getTemplatedDecl();
2480 auto *ExistingPattern = Existing->getTemplatedDecl();
2481 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2482 DPattern->getCanonicalDecl()->getGlobalID(),
2483 IsKeyDecl);
2484
2485 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2486 // Merge with any existing definition.
2487 // FIXME: This is duplicated in several places. Refactor.
2488 auto *ExistingClass =
2489 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2490 if (auto *DDD = DClass->DefinitionData) {
2491 if (ExistingClass->DefinitionData) {
2492 MergeDefinitionData(ExistingClass, std::move(*DDD));
2493 } else {
2494 ExistingClass->DefinitionData = DClass->DefinitionData;
2495 // We may have skipped this before because we thought that DClass
2496 // was the canonical declaration.
2497 Reader.PendingDefinitions.insert(DClass);
2498 }
2499 }
2500 DClass->DefinitionData = ExistingClass->DefinitionData;
2501
2502 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2503 Result);
2504 }
2505 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2506 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2507 Result);
2508 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2509 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2510 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2511 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2512 Result);
2513 llvm_unreachable("merged an unknown kind of redeclarable template")::llvm::llvm_unreachable_internal("merged an unknown kind of redeclarable template"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2513)
;
2514}
2515
2516/// Attempts to merge the given declaration (D) with another declaration
2517/// of the same entity.
2518template<typename T>
2519void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2520 RedeclarableResult &Redecl,
2521 DeclID TemplatePatternID) {
2522 auto *D = static_cast<T *>(DBase);
2523 T *ExistingCanon = Existing->getCanonicalDecl();
2524 T *DCanon = D->getCanonicalDecl();
2525 if (ExistingCanon != DCanon) {
2526 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&((DCanon->getGlobalID() == Redecl.getFirstID() && "already merged this declaration"
) ? static_cast<void> (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2527, __PRETTY_FUNCTION__))
2527 "already merged this declaration")((DCanon->getGlobalID() == Redecl.getFirstID() && "already merged this declaration"
) ? static_cast<void> (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2527, __PRETTY_FUNCTION__))
;
2528
2529 // Have our redeclaration link point back at the canonical declaration
2530 // of the existing declaration, so that this declaration has the
2531 // appropriate canonical declaration.
2532 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2533 D->First = ExistingCanon;
2534 ExistingCanon->Used |= D->Used;
2535 D->Used = false;
2536
2537 // When we merge a namespace, update its pointer to the first namespace.
2538 // We cannot have loaded any redeclarations of this declaration yet, so
2539 // there's nothing else that needs to be updated.
2540 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2541 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2542 assert_cast<NamespaceDecl*>(ExistingCanon));
2543
2544 // When we merge a template, merge its pattern.
2545 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2546 mergeTemplatePattern(
2547 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2548 TemplatePatternID, Redecl.isKeyDecl());
2549
2550 // If this declaration is a key declaration, make a note of that.
2551 if (Redecl.isKeyDecl())
2552 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2553 }
2554}
2555
2556/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2557/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2558/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2559/// that some types are mergeable during deserialization, otherwise name
2560/// lookup fails. This is the case for EnumConstantDecl.
2561static bool allowODRLikeMergeInC(NamedDecl *ND) {
2562 if (!ND)
2563 return false;
2564 // TODO: implement merge for other necessary decls.
2565 if (isa<EnumConstantDecl>(ND))
2566 return true;
2567 return false;
2568}
2569
2570/// Attempts to merge LifetimeExtendedTemporaryDecl with
2571/// identical class definitions from two different modules.
2572void ASTDeclReader::mergeMergeable(LifetimeExtendedTemporaryDecl *D) {
2573 // If modules are not available, there is no reason to perform this merge.
2574 if (!Reader.getContext().getLangOpts().Modules)
2575 return;
2576
2577 LifetimeExtendedTemporaryDecl *LETDecl = D;
2578
2579 LifetimeExtendedTemporaryDecl *&LookupResult =
2580 Reader.LETemporaryForMerging[std::make_pair(
2581 LETDecl->getExtendingDecl(), LETDecl->getManglingNumber())];
2582 if (LookupResult)
2583 Reader.getContext().setPrimaryMergedDecl(LETDecl,
2584 LookupResult->getCanonicalDecl());
2585 else
2586 LookupResult = LETDecl;
2587}
2588
2589/// Attempts to merge the given declaration (D) with another declaration
2590/// of the same entity, for the case where the entity is not actually
2591/// redeclarable. This happens, for instance, when merging the fields of
2592/// identical class definitions from two different modules.
2593template<typename T>
2594void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2595 // If modules are not available, there is no reason to perform this merge.
2596 if (!Reader.getContext().getLangOpts().Modules)
2597 return;
2598
2599 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2600 // Note that C identically-named things in different translation units are
2601 // not redeclarations, but may still have compatible types, where ODR-like
2602 // semantics may apply.
2603 if (!Reader.getContext().getLangOpts().CPlusPlus &&
2604 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2605 return;
2606
2607 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2608 if (T *Existing = ExistingRes)
2609 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2610 Existing->getCanonicalDecl());
2611}
2612
2613void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2614 VisitDecl(D);
2615 unsigned NumVars = D->varlist_size();
2616 SmallVector<Expr *, 16> Vars;
2617 Vars.reserve(NumVars);
2618 for (unsigned i = 0; i != NumVars; ++i) {
2619 Vars.push_back(Record.readExpr());
2620 }
2621 D->setVars(Vars);
2622}
2623
2624void ASTDeclReader::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2625 VisitDecl(D);
2626 unsigned NumVars = D->varlist_size();
2627 unsigned NumClauses = D->clauselist_size();
2628 SmallVector<Expr *, 16> Vars;
2629 Vars.reserve(NumVars);
2630 for (unsigned i = 0; i != NumVars; ++i) {
2631 Vars.push_back(Record.readExpr());
2632 }
2633 D->setVars(Vars);
2634 SmallVector<OMPClause *, 8> Clauses;
2635 Clauses.reserve(NumClauses);
2636 for (unsigned I = 0; I != NumClauses; ++I)
2637 Clauses.push_back(Record.readOMPClause());
2638 D->setClauses(Clauses);
2639}
2640
2641void ASTDeclReader::VisitOMPRequiresDecl(OMPRequiresDecl * D) {
2642 VisitDecl(D);
2643 unsigned NumClauses = D->clauselist_size();
2644 SmallVector<OMPClause *, 8> Clauses;
2645 Clauses.reserve(NumClauses);
2646 for (unsigned I = 0; I != NumClauses; ++I)
2647 Clauses.push_back(Record.readOMPClause());
2648 D->setClauses(Clauses);
2649}
2650
2651void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2652 VisitValueDecl(D);
2653 D->setLocation(readSourceLocation());
2654 Expr *In = Record.readExpr();
2655 Expr *Out = Record.readExpr();
2656 D->setCombinerData(In, Out);
2657 Expr *Combiner = Record.readExpr();
2658 D->setCombiner(Combiner);
2659 Expr *Orig = Record.readExpr();
2660 Expr *Priv = Record.readExpr();
2661 D->setInitializerData(Orig, Priv);
2662 Expr *Init = Record.readExpr();
2663 auto IK = static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt());
2664 D->setInitializer(Init, IK);
2665 D->PrevDeclInScope = readDeclID();
2666}
2667
2668void ASTDeclReader::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2669 VisitValueDecl(D);
2670 D->setLocation(readSourceLocation());
2671 Expr *MapperVarRefE = Record.readExpr();
2672 D->setMapperVarRef(MapperVarRefE);
2673 D->VarName = Record.readDeclarationName();
2674 D->PrevDeclInScope = readDeclID();
2675 unsigned NumClauses = D->clauselist_size();
2676 SmallVector<OMPClause *, 8> Clauses;
2677 Clauses.reserve(NumClauses);
2678 for (unsigned I = 0; I != NumClauses; ++I)
2679 Clauses.push_back(Record.readOMPClause());
2680 D->setClauses(Clauses);
2681}
2682
2683void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2684 VisitVarDecl(D);
2685}
2686
2687//===----------------------------------------------------------------------===//
2688// Attribute Reading
2689//===----------------------------------------------------------------------===//
2690
2691namespace {
2692class AttrReader {
2693 ASTRecordReader &Reader;
2694
2695public:
2696 AttrReader(ASTRecordReader &Reader) : Reader(Reader) {}
2697
2698 uint64_t readInt() {
2699 return Reader.readInt();
2700 }
2701
2702 SourceRange readSourceRange() {
2703 return Reader.readSourceRange();
2704 }
2705
2706 SourceLocation readSourceLocation() {
2707 return Reader.readSourceLocation();
2708 }
2709
2710 Expr *readExpr() { return Reader.readExpr(); }
2711
2712 std::string readString() {
2713 return Reader.readString();
2714 }
2715
2716 TypeSourceInfo *readTypeSourceInfo() {
2717 return Reader.readTypeSourceInfo();
2718 }
2719
2720 IdentifierInfo *readIdentifier() {
2721 return Reader.readIdentifier();
2722 }
2723
2724 VersionTuple readVersionTuple() {
2725 return Reader.readVersionTuple();
2726 }
2727
2728 template <typename T> T *GetLocalDeclAs(uint32_t LocalID) {
2729 return Reader.GetLocalDeclAs<T>(LocalID);
2730 }
2731};
2732}
2733
2734Attr *ASTRecordReader::readAttr() {
2735 AttrReader Record(*this);
2736 auto V = Record.readInt();
2737 if (!V)
2738 return nullptr;
2739
2740 Attr *New = nullptr;
2741 // Kind is stored as a 1-based integer because 0 is used to indicate a null
2742 // Attr pointer.
2743 auto Kind = static_cast<attr::Kind>(V - 1);
2744 ASTContext &Context = getContext();
2745
2746 IdentifierInfo *AttrName = Record.readIdentifier();
2747 IdentifierInfo *ScopeName = Record.readIdentifier();
2748 SourceRange AttrRange = Record.readSourceRange();
2749 SourceLocation ScopeLoc = Record.readSourceLocation();
2750 unsigned ParsedKind = Record.readInt();
2751 unsigned Syntax = Record.readInt();
2752 unsigned SpellingIndex = Record.readInt();
2753
2754 AttributeCommonInfo Info(AttrName, ScopeName, AttrRange, ScopeLoc,
2755 AttributeCommonInfo::Kind(ParsedKind),
2756 AttributeCommonInfo::Syntax(Syntax), SpellingIndex);
2757
2758#include "clang/Serialization/AttrPCHRead.inc"
2759
2760 assert(New && "Unable to decode attribute?")((New && "Unable to decode attribute?") ? static_cast
<void> (0) : __assert_fail ("New && \"Unable to decode attribute?\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2760, __PRETTY_FUNCTION__))
;
2761 return New;
2762}
2763
2764/// Reads attributes from the current stream position.
2765void ASTRecordReader::readAttributes(AttrVec &Attrs) {
2766 for (unsigned I = 0, E = readInt(); I != E; ++I)
2767 Attrs.push_back(readAttr());
2768}
2769
2770//===----------------------------------------------------------------------===//
2771// ASTReader Implementation
2772//===----------------------------------------------------------------------===//
2773
2774/// Note that we have loaded the declaration with the given
2775/// Index.
2776///
2777/// This routine notes that this declaration has already been loaded,
2778/// so that future GetDecl calls will return this declaration rather
2779/// than trying to load a new declaration.
2780inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2781 assert(!DeclsLoaded[Index] && "Decl loaded twice?")((!DeclsLoaded[Index] && "Decl loaded twice?") ? static_cast
<void> (0) : __assert_fail ("!DeclsLoaded[Index] && \"Decl loaded twice?\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2781, __PRETTY_FUNCTION__))
;
2782 DeclsLoaded[Index] = D;
2783}
2784
2785/// Determine whether the consumer will be interested in seeing
2786/// this declaration (via HandleTopLevelDecl).
2787///
2788/// This routine should return true for anything that might affect
2789/// code generation, e.g., inline function definitions, Objective-C
2790/// declarations with metadata, etc.
2791static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2792 // An ObjCMethodDecl is never considered as "interesting" because its
2793 // implementation container always is.
2794
2795 // An ImportDecl or VarDecl imported from a module map module will get
2796 // emitted when we import the relevant module.
2797 if (isPartOfPerModuleInitializer(D)) {
2798 auto *M = D->getImportedOwningModule();
2799 if (M && M->Kind == Module::ModuleMapModule &&
2800 Ctx.DeclMustBeEmitted(D))
2801 return false;
2802 }
2803
2804 if (isa<FileScopeAsmDecl>(D) ||
2805 isa<ObjCProtocolDecl>(D) ||
2806 isa<ObjCImplDecl>(D) ||
2807 isa<ImportDecl>(D) ||
2808 isa<PragmaCommentDecl>(D) ||
2809 isa<PragmaDetectMismatchDecl>(D))
2810 return true;
2811 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D) ||
2812 isa<OMPDeclareMapperDecl>(D) || isa<OMPAllocateDecl>(D))
2813 return !D->getDeclContext()->isFunctionOrMethod();
2814 if (const auto *Var = dyn_cast<VarDecl>(D))
2815 return Var->isFileVarDecl() &&
2816 (Var->isThisDeclarationADefinition() == VarDecl::Definition ||
2817 OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Var));
2818 if (const auto *Func = dyn_cast<FunctionDecl>(D))
2819 return Func->doesThisDeclarationHaveABody() || HasBody;
2820
2821 if (auto *ES = D->getASTContext().getExternalSource())
2822 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2823 return true;
2824
2825 return false;
2826}
2827
2828/// Get the correct cursor and offset for loading a declaration.
2829ASTReader::RecordLocation
2830ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2831 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2832 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")((I != GlobalDeclMap.end() && "Corrupted global declaration map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2832, __PRETTY_FUNCTION__))
;
2833 ModuleFile *M = I->second;
2834 const DeclOffset &DOffs =
2835 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2836 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2837 return RecordLocation(M, DOffs.BitOffset);
2838}
2839
2840ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2841 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2842
2843 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map")((I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalBitOffsetsMap.end() && \"Corrupted global bit offsets map\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2843, __PRETTY_FUNCTION__))
;
2844 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2845}
2846
2847uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2848 return LocalOffset + M.GlobalBitOffset;
2849}
2850
2851static bool isSameTemplateParameterList(const TemplateParameterList *X,
2852 const TemplateParameterList *Y);
2853
2854/// Determine whether two template parameters are similar enough
2855/// that they may be used in declarations of the same template.
2856static bool isSameTemplateParameter(const NamedDecl *X,
2857 const NamedDecl *Y) {
2858 if (X->getKind() != Y->getKind())
2859 return false;
2860
2861 if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2862 const auto *TY = cast<TemplateTypeParmDecl>(Y);
2863 return TX->isParameterPack() == TY->isParameterPack();
2864 }
2865
2866 if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2867 const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2868 return TX->isParameterPack() == TY->isParameterPack() &&
2869 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2870 }
2871
2872 const auto *TX = cast<TemplateTemplateParmDecl>(X);
2873 const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2874 return TX->isParameterPack() == TY->isParameterPack() &&
2875 isSameTemplateParameterList(TX->getTemplateParameters(),
2876 TY->getTemplateParameters());
2877}
2878
2879static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2880 if (auto *NS = X->getAsNamespace())
2881 return NS;
2882 if (auto *NAS = X->getAsNamespaceAlias())
2883 return NAS->getNamespace();
2884 return nullptr;
2885}
2886
2887static bool isSameQualifier(const NestedNameSpecifier *X,
2888 const NestedNameSpecifier *Y) {
2889 if (auto *NSX = getNamespace(X)) {
2890 auto *NSY = getNamespace(Y);
2891 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2892 return false;
2893 } else if (X->getKind() != Y->getKind())
2894 return false;
2895
2896 // FIXME: For namespaces and types, we're permitted to check that the entity
2897 // is named via the same tokens. We should probably do so.
2898 switch (X->getKind()) {
2899 case NestedNameSpecifier::Identifier:
2900 if (X->getAsIdentifier() != Y->getAsIdentifier())
2901 return false;
2902 break;
2903 case NestedNameSpecifier::Namespace:
2904 case NestedNameSpecifier::NamespaceAlias:
2905 // We've already checked that we named the same namespace.
2906 break;
2907 case NestedNameSpecifier::TypeSpec:
2908 case NestedNameSpecifier::TypeSpecWithTemplate:
2909 if (X->getAsType()->getCanonicalTypeInternal() !=
2910 Y->getAsType()->getCanonicalTypeInternal())
2911 return false;
2912 break;
2913 case NestedNameSpecifier::Global:
2914 case NestedNameSpecifier::Super:
2915 return true;
2916 }
2917
2918 // Recurse into earlier portion of NNS, if any.
2919 auto *PX = X->getPrefix();
2920 auto *PY = Y->getPrefix();
2921 if (PX && PY)
2922 return isSameQualifier(PX, PY);
2923 return !PX && !PY;
2924}
2925
2926/// Determine whether two template parameter lists are similar enough
2927/// that they may be used in declarations of the same template.
2928static bool isSameTemplateParameterList(const TemplateParameterList *X,
2929 const TemplateParameterList *Y) {
2930 if (X->size() != Y->size())
2931 return false;
2932
2933 for (unsigned I = 0, N = X->size(); I != N; ++I)
2934 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2935 return false;
2936
2937 return true;
2938}
2939
2940/// Determine whether the attributes we can overload on are identical for A and
2941/// B. Will ignore any overloadable attrs represented in the type of A and B.
2942static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2943 const FunctionDecl *B) {
2944 // Note that pass_object_size attributes are represented in the function's
2945 // ExtParameterInfo, so we don't need to check them here.
2946
2947 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2948 auto AEnableIfAttrs = A->specific_attrs<EnableIfAttr>();
2949 auto BEnableIfAttrs = B->specific_attrs<EnableIfAttr>();
2950
2951 for (auto Pair : zip_longest(AEnableIfAttrs, BEnableIfAttrs)) {
2952 Optional<EnableIfAttr *> Cand1A = std::get<0>(Pair);
2953 Optional<EnableIfAttr *> Cand2A = std::get<1>(Pair);
2954
2955 // Return false if the number of enable_if attributes is different.
2956 if (!Cand1A || !Cand2A)
2957 return false;
2958
2959 Cand1ID.clear();
2960 Cand2ID.clear();
2961
2962 (*Cand1A)->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2963 (*Cand2A)->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2964
2965 // Return false if any of the enable_if expressions of A and B are
2966 // different.
2967 if (Cand1ID != Cand2ID)
2968 return false;
2969 }
2970 return true;
2971}
2972
2973/// Determine whether the two declarations refer to the same entity.
2974static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2975 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!")((X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!"
) ? static_cast<void> (0) : __assert_fail ("X->getDeclName() == Y->getDeclName() && \"Declaration name mismatch!\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2975, __PRETTY_FUNCTION__))
;
2976
2977 if (X == Y)
2978 return true;
2979
2980 // Must be in the same context.
2981 //
2982 // Note that we can't use DeclContext::Equals here, because the DeclContexts
2983 // could be two different declarations of the same function. (We will fix the
2984 // semantic DC to refer to the primary definition after merging.)
2985 if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
2986 cast<Decl>(Y->getDeclContext()->getRedeclContext())))
2987 return false;
2988
2989 // Two typedefs refer to the same entity if they have the same underlying
2990 // type.
2991 if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
2992 if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2993 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2994 TypedefY->getUnderlyingType());
2995
2996 // Must have the same kind.
2997 if (X->getKind() != Y->getKind())
2998 return false;
2999
3000 // Objective-C classes and protocols with the same name always match.
3001 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
3002 return true;
3003
3004 if (isa<ClassTemplateSpecializationDecl>(X)) {
3005 // No need to handle these here: we merge them when adding them to the
3006 // template.
3007 return false;
3008 }
3009
3010 // Compatible tags match.
3011 if (const auto *TagX = dyn_cast<TagDecl>(X)) {
3012 const auto *TagY = cast<TagDecl>(Y);
3013 return (TagX->getTagKind() == TagY->getTagKind()) ||
3014 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
3015 TagX->getTagKind() == TTK_Interface) &&
3016 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
3017 TagY->getTagKind() == TTK_Interface));
3018 }
3019
3020 // Functions with the same type and linkage match.
3021 // FIXME: This needs to cope with merging of prototyped/non-prototyped
3022 // functions, etc.
3023 if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
3024 const auto *FuncY = cast<FunctionDecl>(Y);
3025 if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
3026 const auto *CtorY = cast<CXXConstructorDecl>(Y);
3027 if (CtorX->getInheritedConstructor() &&
3028 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
3029 CtorY->getInheritedConstructor().getConstructor()))
3030 return false;
3031 }
3032
3033 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
3034 return false;
3035
3036 // Multiversioned functions with different feature strings are represented
3037 // as separate declarations.
3038 if (FuncX->isMultiVersion()) {
3039 const auto *TAX = FuncX->getAttr<TargetAttr>();
3040 const auto *TAY = FuncY->getAttr<TargetAttr>();
3041 assert(TAX && TAY && "Multiversion Function without target attribute")((TAX && TAY && "Multiversion Function without target attribute"
) ? static_cast<void> (0) : __assert_fail ("TAX && TAY && \"Multiversion Function without target attribute\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3041, __PRETTY_FUNCTION__))
;
3042
3043 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
3044 return false;
3045 }
3046
3047 ASTContext &C = FuncX->getASTContext();
3048 auto GetTypeAsWritten = [](const FunctionDecl *FD) {
3049 // Map to the first declaration that we've already merged into this one.
3050 // The TSI of redeclarations might not match (due to calling conventions
3051 // being inherited onto the type but not the TSI), but the TSI type of
3052 // the first declaration of the function should match across modules.
3053 FD = FD->getCanonicalDecl();
3054 return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
3055 : FD->getType();
3056 };
3057 QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
3058 if (!C.hasSameType(XT, YT)) {
3059 // We can get functions with different types on the redecl chain in C++17
3060 // if they have differing exception specifications and at least one of
3061 // the excpetion specs is unresolved.
3062 auto *XFPT = XT->getAs<FunctionProtoType>();
3063 auto *YFPT = YT->getAs<FunctionProtoType>();
3064 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
3065 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
3066 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
3067 C.hasSameFunctionTypeIgnoringExceptionSpec(XT, YT))
3068 return true;
3069 return false;
3070 }
3071 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
3072 hasSameOverloadableAttrs(FuncX, FuncY);
3073 }
3074
3075 // Variables with the same type and linkage match.
3076 if (const auto *VarX = dyn_cast<VarDecl>(X)) {
3077 const auto *VarY = cast<VarDecl>(Y);
3078 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
3079 ASTContext &C = VarX->getASTContext();
3080 if (C.hasSameType(VarX->getType(), VarY->getType()))
3081 return true;
3082
3083 // We can get decls with different types on the redecl chain. Eg.
3084 // template <typename T> struct S { static T Var[]; }; // #1
3085 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
3086 // Only? happens when completing an incomplete array type. In this case
3087 // when comparing #1 and #2 we should go through their element type.
3088 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
3089 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
3090 if (!VarXTy || !VarYTy)
3091 return false;
3092 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
3093 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
3094 }
3095 return false;
3096 }
3097
3098 // Namespaces with the same name and inlinedness match.
3099 if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
3100 const auto *NamespaceY = cast<NamespaceDecl>(Y);
3101 return NamespaceX->isInline() == NamespaceY->isInline();
3102 }
3103
3104 // Identical template names and kinds match if their template parameter lists
3105 // and patterns match.
3106 if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3107 const auto *TemplateY = cast<TemplateDecl>(Y);
3108 return isSameEntity(TemplateX->getTemplatedDecl(),
3109 TemplateY->getTemplatedDecl()) &&
3110 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3111 TemplateY->getTemplateParameters());
3112 }
3113
3114 // Fields with the same name and the same type match.
3115 if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3116 const auto *FDY = cast<FieldDecl>(Y);
3117 // FIXME: Also check the bitwidth is odr-equivalent, if any.
3118 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3119 }
3120
3121 // Indirect fields with the same target field match.
3122 if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3123 const auto *IFDY = cast<IndirectFieldDecl>(Y);
3124 return IFDX->getAnonField()->getCanonicalDecl() ==
3125 IFDY->getAnonField()->getCanonicalDecl();
3126 }
3127
3128 // Enumerators with the same name match.
3129 if (isa<EnumConstantDecl>(X))
3130 // FIXME: Also check the value is odr-equivalent.
3131 return true;
3132
3133 // Using shadow declarations with the same target match.
3134 if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3135 const auto *USY = cast<UsingShadowDecl>(Y);
3136 return USX->getTargetDecl() == USY->getTargetDecl();
3137 }
3138
3139 // Using declarations with the same qualifier match. (We already know that
3140 // the name matches.)
3141 if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3142 const auto *UY = cast<UsingDecl>(Y);
3143 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3144 UX->hasTypename() == UY->hasTypename() &&
3145 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3146 }
3147 if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3148 const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3149 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3150 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3151 }
3152 if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3153 return isSameQualifier(
3154 UX->getQualifier(),
3155 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3156
3157 // Namespace alias definitions with the same target match.
3158 if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3159 const auto *NAY = cast<NamespaceAliasDecl>(Y);
3160 return NAX->getNamespace()->Equals(NAY->getNamespace());
3161 }
3162
3163 return false;
3164}
3165
3166/// Find the context in which we should search for previous declarations when
3167/// looking for declarations to merge.
3168DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3169 DeclContext *DC) {
3170 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3171 return ND->getOriginalNamespace();
3172
3173 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3174 // Try to dig out the definition.
3175 auto *DD = RD->DefinitionData;
3176 if (!DD)
3177 DD = RD->getCanonicalDecl()->DefinitionData;
3178
3179 // If there's no definition yet, then DC's definition is added by an update
3180 // record, but we've not yet loaded that update record. In this case, we
3181 // commit to DC being the canonical definition now, and will fix this when
3182 // we load the update record.
3183 if (!DD) {
3184 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3185 RD->setCompleteDefinition(true);
3186 RD->DefinitionData = DD;
3187 RD->getCanonicalDecl()->DefinitionData = DD;
3188
3189 // Track that we did this horrible thing so that we can fix it later.
3190 Reader.PendingFakeDefinitionData.insert(
3191 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3192 }
3193
3194 return DD->Definition;
3195 }
3196
3197 if (auto *ED = dyn_cast<EnumDecl>(DC))
3198 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3199 : nullptr;
3200
3201 // We can see the TU here only if we have no Sema object. In that case,
3202 // there's no TU scope to look in, so using the DC alone is sufficient.
3203 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3204 return TU;
3205
3206 return nullptr;
3207}
3208
3209ASTDeclReader::FindExistingResult::~FindExistingResult() {
3210 // Record that we had a typedef name for linkage whether or not we merge
3211 // with that declaration.
3212 if (TypedefNameForLinkage) {
3213 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3214 Reader.ImportedTypedefNamesForLinkage.insert(
3215 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3216 return;
3217 }
3218
3219 if (!AddResult || Existing)
3220 return;
3221
3222 DeclarationName Name = New->getDeclName();
3223 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3224 if (needsAnonymousDeclarationNumber(New)) {
3225 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3226 AnonymousDeclNumber, New);
3227 } else if (DC->isTranslationUnit() &&
3228 !Reader.getContext().getLangOpts().CPlusPlus) {
3229 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3230 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3231 .push_back(New);
3232 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3233 // Add the declaration to its redeclaration context so later merging
3234 // lookups will find it.
3235 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3236 }
3237}
3238
3239/// Find the declaration that should be merged into, given the declaration found
3240/// by name lookup. If we're merging an anonymous declaration within a typedef,
3241/// we need a matching typedef, and we merge with the type inside it.
3242static NamedDecl *getDeclForMerging(NamedDecl *Found,
3243 bool IsTypedefNameForLinkage) {
3244 if (!IsTypedefNameForLinkage)
3245 return Found;
3246
3247 // If we found a typedef declaration that gives a name to some other
3248 // declaration, then we want that inner declaration. Declarations from
3249 // AST files are handled via ImportedTypedefNamesForLinkage.
3250 if (Found->isFromASTFile())
3251 return nullptr;
3252
3253 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3254 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3255
3256 return nullptr;
3257}
3258
3259/// Find the declaration to use to populate the anonymous declaration table
3260/// for the given lexical DeclContext. We only care about finding local
3261/// definitions of the context; we'll merge imported ones as we go.
3262DeclContext *
3263ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3264 // For classes, we track the definition as we merge.
3265 if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3266 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3267 return DD ? DD->Definition : nullptr;
3268 }
3269
3270 // For anything else, walk its merged redeclarations looking for a definition.
3271 // Note that we can't just call getDefinition here because the redeclaration
3272 // chain isn't wired up.
3273 for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3274 if (auto *FD = dyn_cast<FunctionDecl>(D))
3275 if (FD->isThisDeclarationADefinition())
3276 return FD;
3277 if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3278 if (MD->isThisDeclarationADefinition())
3279 return MD;
3280 }
3281
3282 // No merged definition yet.
3283 return nullptr;
3284}
3285
3286NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3287 DeclContext *DC,
3288 unsigned Index) {
3289 // If the lexical context has been merged, look into the now-canonical
3290 // definition.
3291 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3292
3293 // If we've seen this before, return the canonical declaration.
3294 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3295 if (Index < Previous.size() && Previous[Index])
3296 return Previous[Index];
3297
3298 // If this is the first time, but we have parsed a declaration of the context,
3299 // build the anonymous declaration list from the parsed declaration.
3300 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3301 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3302 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3303 if (Previous.size() == Number)
3304 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3305 else
3306 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3307 });
3308 }
3309
3310 return Index < Previous.size() ? Previous[Index] : nullptr;
3311}
3312
3313void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3314 DeclContext *DC, unsigned Index,
3315 NamedDecl *D) {
3316 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3317
3318 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3319 if (Index >= Previous.size())
3320 Previous.resize(Index + 1);
3321 if (!Previous[Index])
3322 Previous[Index] = D;
3323}
3324
3325ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3326 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3327 : D->getDeclName();
3328
3329 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3330 // Don't bother trying to find unnamed declarations that are in
3331 // unmergeable contexts.
3332 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3333 AnonymousDeclNumber, TypedefNameForLinkage);
3334 Result.suppress();
3335 return Result;
3336 }
3337
3338 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3339 if (TypedefNameForLinkage) {
3340 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3341 std::make_pair(DC, TypedefNameForLinkage));
3342 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3343 if (isSameEntity(It->second, D))
3344 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3345 TypedefNameForLinkage);
3346 // Go on to check in other places in case an existing typedef name
3347 // was not imported.
3348 }
3349
3350 if (needsAnonymousDeclarationNumber(D)) {
3351 // This is an anonymous declaration that we may need to merge. Look it up
3352 // in its context by number.
3353 if (auto *Existing = getAnonymousDeclForMerging(
3354 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3355 if (isSameEntity(Existing, D))
3356 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3357 TypedefNameForLinkage);
3358 } else if (DC->isTranslationUnit() &&
3359 !Reader.getContext().getLangOpts().CPlusPlus) {
3360 IdentifierResolver &IdResolver = Reader.getIdResolver();
3361
3362 // Temporarily consider the identifier to be up-to-date. We don't want to
3363 // cause additional lookups here.
3364 class UpToDateIdentifierRAII {
3365 IdentifierInfo *II;
3366 bool WasOutToDate = false;
3367
3368 public:
3369 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3370 if (II) {
3371 WasOutToDate = II->isOutOfDate();
3372 if (WasOutToDate)
3373 II->setOutOfDate(false);
3374 }
3375 }
3376
3377 ~UpToDateIdentifierRAII() {
3378 if (WasOutToDate)
3379 II->setOutOfDate(true);
3380 }
3381 } UpToDate(Name.getAsIdentifierInfo());
3382
3383 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3384 IEnd = IdResolver.end();
3385 I != IEnd; ++I) {
3386 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3387 if (isSameEntity(Existing, D))
3388 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3389 TypedefNameForLinkage);
3390 }
3391 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3392 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3393 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3394 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3395 if (isSameEntity(Existing, D))
3396 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3397 TypedefNameForLinkage);
3398 }
3399 } else {
3400 // Not in a mergeable context.
3401 return FindExistingResult(Reader);
3402 }
3403
3404 // If this declaration is from a merged context, make a note that we need to
3405 // check that the canonical definition of that context contains the decl.
3406 //
3407 // FIXME: We should do something similar if we merge two definitions of the
3408 // same template specialization into the same CXXRecordDecl.
3409 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3410 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3411 MergedDCIt->second == D->getDeclContext())
3412 Reader.PendingOdrMergeChecks.push_back(D);
3413
3414 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3415 AnonymousDeclNumber, TypedefNameForLinkage);
3416}
3417
3418template<typename DeclT>
3419Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3420 return D->RedeclLink.getLatestNotUpdated();
3421}
3422
3423Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3424 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3424)
;
3425}
3426
3427Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3428 assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3428, __PRETTY_FUNCTION__))
;
3429
3430 switch (D->getKind()) {
3431#define ABSTRACT_DECL(TYPE)
3432#define DECL(TYPE, BASE) \
3433 case Decl::TYPE: \
3434 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3435#include "clang/AST/DeclNodes.inc"
3436 }
3437 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3437)
;
3438}
3439
3440Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3441 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3442}
3443
3444template<typename DeclT>
3445void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3446 Redeclarable<DeclT> *D,
3447 Decl *Previous, Decl *Canon) {
3448 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3449 D->First = cast<DeclT>(Previous)->First;
3450}
3451
3452namespace clang {
3453
3454template<>
3455void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3456 Redeclarable<VarDecl> *D,
3457 Decl *Previous, Decl *Canon) {
3458 auto *VD = static_cast<VarDecl *>(D);
3459 auto *PrevVD = cast<VarDecl>(Previous);
3460 D->RedeclLink.setPrevious(PrevVD);
3461 D->First = PrevVD->First;
3462
3463 // We should keep at most one definition on the chain.
3464 // FIXME: Cache the definition once we've found it. Building a chain with
3465 // N definitions currently takes O(N^2) time here.
3466 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3467 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3468 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3469 Reader.mergeDefinitionVisibility(CurD, VD);
3470 VD->demoteThisDefinitionToDeclaration();
3471 break;
3472 }
3473 }
3474 }
3475}
3476
3477static bool isUndeducedReturnType(QualType T) {
3478 auto *DT = T->getContainedDeducedType();
3479 return DT && !DT->isDeduced();
3480}
3481
3482template<>
3483void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3484 Redeclarable<FunctionDecl> *D,
3485 Decl *Previous, Decl *Canon) {
3486 auto *FD = static_cast<FunctionDecl *>(D);
3487 auto *PrevFD = cast<FunctionDecl>(Previous);
3488
3489 FD->RedeclLink.setPrevious(PrevFD);
3490 FD->First = PrevFD->First;
3491
3492 // If the previous declaration is an inline function declaration, then this
3493 // declaration is too.
3494 if (PrevFD->isInlined() != FD->isInlined()) {
3495 // FIXME: [dcl.fct.spec]p4:
3496 // If a function with external linkage is declared inline in one
3497 // translation unit, it shall be declared inline in all translation
3498 // units in which it appears.
3499 //
3500 // Be careful of this case:
3501 //
3502 // module A:
3503 // template<typename T> struct X { void f(); };
3504 // template<typename T> inline void X<T>::f() {}
3505 //
3506 // module B instantiates the declaration of X<int>::f
3507 // module C instantiates the definition of X<int>::f
3508 //
3509 // If module B and C are merged, we do not have a violation of this rule.
3510 FD->setImplicitlyInline(true);
3511 }
3512
3513 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3514 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3515 if (FPT && PrevFPT) {
3516 // If we need to propagate an exception specification along the redecl
3517 // chain, make a note of that so that we can do so later.
3518 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3519 bool WasUnresolved =
3520 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3521 if (IsUnresolved != WasUnresolved)
3522 Reader.PendingExceptionSpecUpdates.insert(
3523 {Canon, IsUnresolved ? PrevFD : FD});
3524
3525 // If we need to propagate a deduced return type along the redecl chain,
3526 // make a note of that so that we can do it later.
3527 bool IsUndeduced = isUndeducedReturnType(FPT->getReturnType());
3528 bool WasUndeduced = isUndeducedReturnType(PrevFPT->getReturnType());
3529 if (IsUndeduced != WasUndeduced)
3530 Reader.PendingDeducedTypeUpdates.insert(
3531 {cast<FunctionDecl>(Canon),
3532 (IsUndeduced ? PrevFPT : FPT)->getReturnType()});
3533 }
3534}
3535
3536} // namespace clang
3537
3538void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3539 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3539)
;
3540}
3541
3542/// Inherit the default template argument from \p From to \p To. Returns
3543/// \c false if there is no default template for \p From.
3544template <typename ParmDecl>
3545static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3546 Decl *ToD) {
3547 auto *To = cast<ParmDecl>(ToD);
3548 if (!From->hasDefaultArgument())
3549 return false;
3550 To->setInheritedDefaultArgument(Context, From);
3551 return true;
3552}
3553
3554static void inheritDefaultTemplateArguments(ASTContext &Context,
3555 TemplateDecl *From,
3556 TemplateDecl *To) {
3557 auto *FromTP = From->getTemplateParameters();
3558 auto *ToTP = To->getTemplateParameters();
3559 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?")((FromTP->size() == ToTP->size() && "merged mismatched templates?"
) ? static_cast<void> (0) : __assert_fail ("FromTP->size() == ToTP->size() && \"merged mismatched templates?\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3559, __PRETTY_FUNCTION__))
;
3560
3561 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3562 NamedDecl *FromParam = FromTP->getParam(I);
3563 NamedDecl *ToParam = ToTP->getParam(I);
3564
3565 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam))
3566 inheritDefaultTemplateArgument(Context, FTTP, ToParam);
3567 else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam))
3568 inheritDefaultTemplateArgument(Context, FNTTP, ToParam);
3569 else
3570 inheritDefaultTemplateArgument(
3571 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam);
3572 }
3573}
3574
3575void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3576 Decl *Previous, Decl *Canon) {
3577 assert(D && Previous)((D && Previous) ? static_cast<void> (0) : __assert_fail
("D && Previous", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3577, __PRETTY_FUNCTION__))
;
3578
3579 switch (D->getKind()) {
3580#define ABSTRACT_DECL(TYPE)
3581#define DECL(TYPE, BASE) \
3582 case Decl::TYPE: \
3583 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3584 break;
3585#include "clang/AST/DeclNodes.inc"
3586 }
3587
3588 // If the declaration was visible in one module, a redeclaration of it in
3589 // another module remains visible even if it wouldn't be visible by itself.
3590 //
3591 // FIXME: In this case, the declaration should only be visible if a module
3592 // that makes it visible has been imported.
3593 D->IdentifierNamespace |=
3594 Previous->IdentifierNamespace &
3595 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3596
3597 // If the declaration declares a template, it may inherit default arguments
3598 // from the previous declaration.
3599 if (auto *TD = dyn_cast<TemplateDecl>(D))
3600 inheritDefaultTemplateArguments(Reader.getContext(),
3601 cast<TemplateDecl>(Previous), TD);
3602}
3603
3604template<typename DeclT>
3605void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3606 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3607}
3608
3609void ASTDeclReader::attachLatestDeclImpl(...) {
3610 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3610)
;
3611}
3612
3613void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3614 assert(D && Latest)((D && Latest) ? static_cast<void> (0) : __assert_fail
("D && Latest", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3614, __PRETTY_FUNCTION__))
;
3615
3616 switch (D->getKind()) {
3617#define ABSTRACT_DECL(TYPE)
3618#define DECL(TYPE, BASE) \
3619 case Decl::TYPE: \
3620 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3621 break;
3622#include "clang/AST/DeclNodes.inc"
3623 }
3624}
3625
3626template<typename DeclT>
3627void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3628 D->RedeclLink.markIncomplete();
3629}
3630
3631void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3632 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3632)
;
3633}
3634
3635void ASTReader::markIncompleteDeclChain(Decl *D) {
3636 switch (D->getKind()) {
3637#define ABSTRACT_DECL(TYPE)
3638#define DECL(TYPE, BASE) \
3639 case Decl::TYPE: \
3640 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3641 break;
3642#include "clang/AST/DeclNodes.inc"
3643 }
3644}
3645
3646/// Read the declaration at the given offset from the AST file.
3647Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3648 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3649 SourceLocation DeclLoc;
3650 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3651 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3652 // Keep track of where we are in the stream, then jump back there
3653 // after reading this declaration.
3654 SavedStreamPosition SavedPosition(DeclsCursor);
3655
3656 ReadingKindTracker ReadingKind(Read_Decl, *this);
3657
3658 // Note that we are loading a declaration record.
3659 Deserializing ADecl(this);
3660
3661 auto Fail = [](const char *what, llvm::Error &&Err) {
3662 llvm::report_fatal_error(Twine("ASTReader::readDeclRecord failed ") + what +
3663 ": " + toString(std::move(Err)));
3664 };
3665
3666 if (llvm::Error JumpFailed = DeclsCursor.JumpToBit(Loc.Offset))
3667 Fail("jumping", std::move(JumpFailed));
3668 ASTRecordReader Record(*this, *Loc.F);
3669 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3670 Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
3671 if (!MaybeCode)
3672 Fail("reading code", MaybeCode.takeError());
3673 unsigned Code = MaybeCode.get();
3674
3675 ASTContext &Context = getContext();
3676 Decl *D = nullptr;
3677 Expected<unsigned> MaybeDeclCode = Record.readRecord(DeclsCursor, Code);
3678 if (!MaybeDeclCode)
3679 llvm::report_fatal_error(
3680 "ASTReader::readDeclRecord failed reading decl code: " +
3681 toString(MaybeDeclCode.takeError()));
3682 switch ((DeclCode)MaybeDeclCode.get()) {
3683 case DECL_CONTEXT_LEXICAL:
3684 case DECL_CONTEXT_VISIBLE:
3685 llvm_unreachable("Record cannot be de-serialized with readDeclRecord")::llvm::llvm_unreachable_internal("Record cannot be de-serialized with readDeclRecord"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3685)
;
3686 case DECL_TYPEDEF:
3687 D = TypedefDecl::CreateDeserialized(Context, ID);
3688 break;
3689 case DECL_TYPEALIAS:
3690 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3691 break;
3692 case DECL_ENUM:
3693 D = EnumDecl::CreateDeserialized(Context, ID);
3694 break;
3695 case DECL_RECORD:
3696 D = RecordDecl::CreateDeserialized(Context, ID);
3697 break;
3698 case DECL_ENUM_CONSTANT:
3699 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3700 break;
3701 case DECL_FUNCTION:
3702 D = FunctionDecl::CreateDeserialized(Context, ID);
3703 break;
3704 case DECL_LINKAGE_SPEC:
3705 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3706 break;
3707 case DECL_EXPORT:
3708 D = ExportDecl::CreateDeserialized(Context, ID);
3709 break;
3710 case DECL_LABEL:
3711 D = LabelDecl::CreateDeserialized(Context, ID);
3712 break;
3713 case DECL_NAMESPACE:
3714 D = NamespaceDecl::CreateDeserialized(Context, ID);
3715 break;
3716 case DECL_NAMESPACE_ALIAS:
3717 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3718 break;
3719 case DECL_USING:
3720 D = UsingDecl::CreateDeserialized(Context, ID);
3721 break;
3722 case DECL_USING_PACK:
3723 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3724 break;
3725 case DECL_USING_SHADOW:
3726 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3727 break;
3728 case DECL_CONSTRUCTOR_USING_SHADOW:
3729 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3730 break;
3731 case DECL_USING_DIRECTIVE:
3732 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3733 break;
3734 case DECL_UNRESOLVED_USING_VALUE:
3735 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3736 break;
3737 case DECL_UNRESOLVED_USING_TYPENAME:
3738 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3739 break;
3740 case DECL_CXX_RECORD:
3741 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3742 break;
3743 case DECL_CXX_DEDUCTION_GUIDE:
3744 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3745 break;
3746 case DECL_CXX_METHOD:
3747 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3748 break;
3749 case DECL_CXX_CONSTRUCTOR:
3750 D = CXXConstructorDecl::CreateDeserialized(Context, ID, Record.readInt());
3751 break;
3752 case DECL_CXX_DESTRUCTOR:
3753 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3754 break;
3755 case DECL_CXX_CONVERSION:
3756 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3757 break;
3758 case DECL_ACCESS_SPEC:
3759 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3760 break;
3761 case DECL_FRIEND:
3762 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3763 break;
3764 case DECL_FRIEND_TEMPLATE:
3765 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3766 break;
3767 case DECL_CLASS_TEMPLATE:
3768 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3769 break;
3770 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3771 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3772 break;
3773 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3774 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3775 break;
3776 case DECL_VAR_TEMPLATE:
3777 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3778 break;
3779 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3780 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3781 break;
3782 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3783 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3784 break;
3785 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3786 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3787 break;
3788 case DECL_FUNCTION_TEMPLATE:
3789 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3790 break;
3791 case DECL_TEMPLATE_TYPE_PARM:
3792 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3793 break;
3794 case DECL_NON_TYPE_TEMPLATE_PARM:
3795 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3796 break;
3797 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3798 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3799 Record.readInt());
3800 break;
3801 case DECL_TEMPLATE_TEMPLATE_PARM:
3802 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3803 break;
3804 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3805 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3806 Record.readInt());
3807 break;
3808 case DECL_TYPE_ALIAS_TEMPLATE:
3809 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3810 break;
3811 case DECL_CONCEPT:
3812 D = ConceptDecl::CreateDeserialized(Context, ID);
3813 break;
3814 case DECL_STATIC_ASSERT:
3815 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3816 break;
3817 case DECL_OBJC_METHOD:
3818 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3819 break;
3820 case DECL_OBJC_INTERFACE:
3821 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3822 break;
3823 case DECL_OBJC_IVAR:
3824 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3825 break;
3826 case DECL_OBJC_PROTOCOL:
3827 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3828 break;
3829 case DECL_OBJC_AT_DEFS_FIELD:
3830 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3831 break;
3832 case DECL_OBJC_CATEGORY:
3833 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3834 break;
3835 case DECL_OBJC_CATEGORY_IMPL:
3836 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3837 break;
3838 case DECL_OBJC_IMPLEMENTATION:
3839 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3840 break;
3841 case DECL_OBJC_COMPATIBLE_ALIAS:
3842 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3843 break;
3844 case DECL_OBJC_PROPERTY:
3845 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3846 break;
3847 case DECL_OBJC_PROPERTY_IMPL:
3848 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3849 break;
3850 case DECL_FIELD:
3851 D = FieldDecl::CreateDeserialized(Context, ID);
3852 break;
3853 case DECL_INDIRECTFIELD:
3854 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3855 break;
3856 case DECL_VAR:
3857 D = VarDecl::CreateDeserialized(Context, ID);
3858 break;
3859 case DECL_IMPLICIT_PARAM:
3860 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3861 break;
3862 case DECL_PARM_VAR:
3863 D = ParmVarDecl::CreateDeserialized(Context, ID);
3864 break;
3865 case DECL_DECOMPOSITION:
3866 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3867 break;
3868 case DECL_BINDING:
3869 D = BindingDecl::CreateDeserialized(Context, ID);
3870 break;
3871 case DECL_FILE_SCOPE_ASM:
3872 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3873 break;
3874 case DECL_BLOCK:
3875 D = BlockDecl::CreateDeserialized(Context, ID);
3876 break;
3877 case DECL_MS_PROPERTY:
3878 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3879 break;
3880 case DECL_CAPTURED:
3881 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3882 break;
3883 case DECL_CXX_BASE_SPECIFIERS:
3884 Error("attempt to read a C++ base-specifier record as a declaration");
3885 return nullptr;
3886 case DECL_CXX_CTOR_INITIALIZERS:
3887 Error("attempt to read a C++ ctor initializer record as a declaration");
3888 return nullptr;
3889 case DECL_IMPORT:
3890 // Note: last entry of the ImportDecl record is the number of stored source
3891 // locations.
3892 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3893 break;
3894 case DECL_OMP_THREADPRIVATE:
3895 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3896 break;
3897 case DECL_OMP_ALLOCATE: {
3898 unsigned NumVars = Record.readInt();
3899 unsigned NumClauses = Record.readInt();
3900 D = OMPAllocateDecl::CreateDeserialized(Context, ID, NumVars, NumClauses);
3901 break;
3902 }
3903 case DECL_OMP_REQUIRES:
3904 D = OMPRequiresDecl::CreateDeserialized(Context, ID, Record.readInt());
3905 break;
3906 case DECL_OMP_DECLARE_REDUCTION:
3907 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3908 break;
3909 case DECL_OMP_DECLARE_MAPPER:
3910 D = OMPDeclareMapperDecl::CreateDeserialized(Context, ID, Record.readInt());
3911 break;
3912 case DECL_OMP_CAPTUREDEXPR:
3913 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3914 break;
3915 case DECL_PRAGMA_COMMENT:
3916 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3917 break;
3918 case DECL_PRAGMA_DETECT_MISMATCH:
3919 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3920 Record.readInt());
3921 break;
3922 case DECL_EMPTY:
3923 D = EmptyDecl::CreateDeserialized(Context, ID);
3924 break;
3925 case DECL_LIFETIME_EXTENDED_TEMPORARY:
3926 D = LifetimeExtendedTemporaryDecl::CreateDeserialized(Context, ID);
3927 break;
3928 case DECL_OBJC_TYPE_PARAM:
3929 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3930 break;
3931 }
3932
3933 assert(D && "Unknown declaration reading AST file")((D && "Unknown declaration reading AST file") ? static_cast
<void> (0) : __assert_fail ("D && \"Unknown declaration reading AST file\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3933, __PRETTY_FUNCTION__))
;
3934 LoadedDecl(Index, D);
3935 // Set the DeclContext before doing any deserialization, to make sure internal
3936 // calls to Decl::getASTContext() by Decl's methods will find the
3937 // TranslationUnitDecl without crashing.
3938 D->setDeclContext(Context.getTranslationUnitDecl());
3939 Reader.Visit(D);
3940
3941 // If this declaration is also a declaration context, get the
3942 // offsets for its tables of lexical and visible declarations.
3943 if (auto *DC = dyn_cast<DeclContext>(D)) {
3944 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3945 if (Offsets.first &&
3946 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3947 return nullptr;
3948 if (Offsets.second &&
3949 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3950 return nullptr;
3951 }
3952 assert(Record.getIdx() == Record.size())((Record.getIdx() == Record.size()) ? static_cast<void>
(0) : __assert_fail ("Record.getIdx() == Record.size()", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3952, __PRETTY_FUNCTION__))
;
3953
3954 // Load any relevant update records.
3955 PendingUpdateRecords.push_back(
3956 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3957
3958 // Load the categories after recursive loading is finished.
3959 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3960 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3961 // we put the Decl in PendingDefinitions so we can pull the categories here.
3962 if (Class->isThisDeclarationADefinition() ||
3963 PendingDefinitions.count(Class))
3964 loadObjCCategories(ID, Class);
3965
3966 // If we have deserialized a declaration that has a definition the
3967 // AST consumer might need to know about, queue it.
3968 // We don't pass it to the consumer immediately because we may be in recursive
3969 // loading, and some declarations may still be initializing.
3970 PotentiallyInterestingDecls.push_back(
3971 InterestingDecl(D, Reader.hasPendingBody()));
3972
3973 return D;
3974}
3975
3976void ASTReader::PassInterestingDeclsToConsumer() {
3977 assert(Consumer)((Consumer) ? static_cast<void> (0) : __assert_fail ("Consumer"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3977, __PRETTY_FUNCTION__))
;
3978
3979 if (PassingDeclsToConsumer)
3980 return;
3981
3982 // Guard variable to avoid recursively redoing the process of passing
3983 // decls to consumer.
3984 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3985 true);
3986
3987 // Ensure that we've loaded all potentially-interesting declarations
3988 // that need to be eagerly loaded.
3989 for (auto ID : EagerlyDeserializedDecls)
3990 GetDecl(ID);
3991 EagerlyDeserializedDecls.clear();
3992
3993 while (!PotentiallyInterestingDecls.empty()) {
3994 InterestingDecl D = PotentiallyInterestingDecls.front();
3995 PotentiallyInterestingDecls.pop_front();
3996 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3997 PassInterestingDeclToConsumer(D.getDecl());
3998 }
3999}
4000
4001void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
4002 // The declaration may have been modified by files later in the chain.
4003 // If this is the case, read the record containing the updates from each file
4004 // and pass it to ASTDeclReader to make the modifications.
4005 serialization::GlobalDeclID ID = Record.ID;
4006 Decl *D = Record.D;
4007 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
4008 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
4009
4010 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
4011
4012 if (UpdI != DeclUpdateOffsets.end()) {
4013 auto UpdateOffsets = std::move(UpdI->second);
4014 DeclUpdateOffsets.erase(UpdI);
4015
4016 // Check if this decl was interesting to the consumer. If we just loaded
4017 // the declaration, then we know it was interesting and we skip the call
4018 // to isConsumerInterestedIn because it is unsafe to call in the
4019 // current ASTReader state.
4020 bool WasInteresting =
4021 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
4022 for (auto &FileAndOffset : UpdateOffsets) {
4023 ModuleFile *F = FileAndOffset.first;
4024 uint64_t Offset = FileAndOffset.second;
4025 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
4026 SavedStreamPosition SavedPosition(Cursor);
4027 if (llvm::Error JumpFailed = Cursor.JumpToBit(Offset))
4028 // FIXME don't do a fatal error.
4029 llvm::report_fatal_error(
4030 "ASTReader::loadDeclUpdateRecords failed jumping: " +
4031 toString(std::move(JumpFailed)));
4032 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4033 if (!MaybeCode)
4034 llvm::report_fatal_error(
4035 "ASTReader::loadDeclUpdateRecords failed reading code: " +
4036 toString(MaybeCode.takeError()));
4037 unsigned Code = MaybeCode.get();
4038 ASTRecordReader Record(*this, *F);
4039 if (Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, Code))
4040 assert(MaybeRecCode.get() == DECL_UPDATES &&((MaybeRecCode.get() == DECL_UPDATES && "Expected DECL_UPDATES record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4041, __PRETTY_FUNCTION__))
4041 "Expected DECL_UPDATES record!")((MaybeRecCode.get() == DECL_UPDATES && "Expected DECL_UPDATES record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4041, __PRETTY_FUNCTION__))
;
4042 else
4043 llvm::report_fatal_error(
4044 "ASTReader::loadDeclUpdateRecords failed reading rec code: " +
4045 toString(MaybeCode.takeError()));
4046
4047 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
4048 SourceLocation());
4049 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
4050
4051 // We might have made this declaration interesting. If so, remember that
4052 // we need to hand it off to the consumer.
4053 if (!WasInteresting &&
4054 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
4055 PotentiallyInterestingDecls.push_back(
4056 InterestingDecl(D, Reader.hasPendingBody()));
4057 WasInteresting = true;
4058 }
4059 }
4060 }
4061 // Add the lazy specializations to the template.
4062 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||(((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl
>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl
>(D)) && "Must not have pending specializations") ?
static_cast<void> (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4064, __PRETTY_FUNCTION__))
4063 isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&(((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl
>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl
>(D)) && "Must not have pending specializations") ?
static_cast<void> (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4064, __PRETTY_FUNCTION__))
4064 "Must not have pending specializations")(((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl
>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl
>(D)) && "Must not have pending specializations") ?
static_cast<void> (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4064, __PRETTY_FUNCTION__))
;
4065 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
4066 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
4067 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4068 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
4069 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
4070 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
4071 PendingLazySpecializationIDs.clear();
4072
4073 // Load the pending visible updates for this decl context, if it has any.
4074 auto I = PendingVisibleUpdates.find(ID);
4075 if (I != PendingVisibleUpdates.end()) {
4076 auto VisibleUpdates = std::move(I->second);
4077 PendingVisibleUpdates.erase(I);
4078
4079 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
4080 for (const auto &Update : VisibleUpdates)
4081 Lookups[DC].Table.add(
4082 Update.Mod, Update.Data,
4083 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
4084 DC->setHasExternalVisibleStorage(true);
4085 }
4086}
4087
4088void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
4089 // Attach FirstLocal to the end of the decl chain.
4090 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
4091 if (FirstLocal != CanonDecl) {
4092 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
4093 ASTDeclReader::attachPreviousDecl(
4094 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
4095 CanonDecl);
4096 }
4097
4098 if (!LocalOffset) {
4099 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
4100 return;
4101 }
4102
4103 // Load the list of other redeclarations from this module file.
4104 ModuleFile *M = getOwningModuleFile(FirstLocal);
4105 assert(M && "imported decl from no module file")((M && "imported decl from no module file") ? static_cast
<void> (0) : __assert_fail ("M && \"imported decl from no module file\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4105, __PRETTY_FUNCTION__))
;
4106
4107 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
4108 SavedStreamPosition SavedPosition(Cursor);
4109 if (llvm::Error JumpFailed = Cursor.JumpToBit(LocalOffset))
4110 llvm::report_fatal_error(
4111 "ASTReader::loadPendingDeclChain failed jumping: " +
4112 toString(std::move(JumpFailed)));
4113
4114 RecordData Record;
4115 Expected<unsigned> MaybeCode = Cursor.ReadCode();
4116 if (!MaybeCode)
4117 llvm::report_fatal_error(
4118 "ASTReader::loadPendingDeclChain failed reading code: " +
4119 toString(MaybeCode.takeError()));
4120 unsigned Code = MaybeCode.get();
4121 if (Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record))
4122 assert(MaybeRecCode.get() == LOCAL_REDECLARATIONS &&((MaybeRecCode.get() == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4123, __PRETTY_FUNCTION__))
4123 "expected LOCAL_REDECLARATIONS record!")((MaybeRecCode.get() == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!"
) ? static_cast<void> (0) : __assert_fail ("MaybeRecCode.get() == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4123, __PRETTY_FUNCTION__))
;
4124 else
4125 llvm::report_fatal_error(
4126 "ASTReader::loadPendingDeclChain failed reading rec code: " +
4127 toString(MaybeCode.takeError()));
4128
4129 // FIXME: We have several different dispatches on decl kind here; maybe
4130 // we should instead generate one loop per kind and dispatch up-front?
4131 Decl *MostRecent = FirstLocal;
4132 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
4133 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
4134 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
4135 MostRecent = D;
4136 }
4137 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
4138}
4139
4140namespace {
4141
4142 /// Given an ObjC interface, goes through the modules and links to the
4143 /// interface all the categories for it.
4144 class ObjCCategoriesVisitor {
4145 ASTReader &Reader;
4146 ObjCInterfaceDecl *Interface;
4147 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
4148 ObjCCategoryDecl *Tail = nullptr;
4149 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
4150 serialization::GlobalDeclID InterfaceID;
4151 unsigned PreviousGeneration;
4152
4153 void add(ObjCCategoryDecl *Cat) {
4154 // Only process each category once.
4155 if (!Deserialized.erase(Cat))
13
Assuming the condition is false
14
Taking false branch
4156 return;
4157
4158 // Check for duplicate categories.
4159 if (Cat->getDeclName()) {
15
Called C++ object pointer is null
4160 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
4161 if (Existing &&
4162 Reader.getOwningModuleFile(Existing)
4163 != Reader.getOwningModuleFile(Cat)) {
4164 // FIXME: We should not warn for duplicates in diamond:
4165 //
4166 // MT //
4167 // / \ //
4168 // ML MR //
4169 // \ / //
4170 // MB //
4171 //
4172 // If there are duplicates in ML/MR, there will be warning when
4173 // creating MB *and* when importing MB. We should not warn when
4174 // importing.
4175 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4176 << Interface->getDeclName() << Cat->getDeclName();
4177 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4178 } else if (!Existing) {
4179 // Record this category.
4180 Existing = Cat;
4181 }
4182 }
4183
4184 // Add this category to the end of the chain.
4185 if (Tail)
4186 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4187 else
4188 Interface->setCategoryListRaw(Cat);
4189 Tail = Cat;
4190 }
4191
4192 public:
4193 ObjCCategoriesVisitor(ASTReader &Reader,
4194 ObjCInterfaceDecl *Interface,
4195 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4196 serialization::GlobalDeclID InterfaceID,
4197 unsigned PreviousGeneration)
4198 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4199 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4200 // Populate the name -> category map with the set of known categories.
4201 for (auto *Cat : Interface->known_categories()) {
4202 if (Cat->getDeclName())
4203 NameCategoryMap[Cat->getDeclName()] = Cat;
4204
4205 // Keep track of the tail of the category list.
4206 Tail = Cat;
4207 }
4208 }
4209
4210 bool operator()(ModuleFile &M) {
4211 // If we've loaded all of the category information we care about from
4212 // this module file, we're done.
4213 if (M.Generation <= PreviousGeneration)
1
Assuming field 'Generation' is > field 'PreviousGeneration'
2
Taking false branch
4214 return true;
4215
4216 // Map global ID of the definition down to the local ID used in this
4217 // module file. If there is no such mapping, we'll find nothing here
4218 // (or in any module it imports).
4219 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4220 if (!LocalID)
3
Assuming 'LocalID' is not equal to 0
4
Taking false branch
4221 return true;
4222
4223 // Perform a binary search to find the local redeclarations for this
4224 // declaration (if any).
4225 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4226 const ObjCCategoriesInfo *Result
4227 = std::lower_bound(M.ObjCCategoriesMap,
4228 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4229 Compare);
4230 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
5
Assuming the condition is false
7
Taking false branch
4231 Result->DefinitionID != LocalID) {
6
Assuming 'LocalID' is equal to field 'DefinitionID'
4232 // We didn't find anything. If the class definition is in this module
4233 // file, then the module files it depends on cannot have any categories,
4234 // so suppress further lookup.
4235 return Reader.isDeclIDFromModule(InterfaceID, M);
4236 }
4237
4238 // We found something. Dig out all of the categories.
4239 unsigned Offset = Result->Offset;
4240 unsigned N = M.ObjCCategories[Offset];
4241 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4242 for (unsigned I = 0; I != N; ++I)
8
Assuming 'I' is not equal to 'N'
9
Loop condition is true. Entering loop body
4243 add(cast_or_null<ObjCCategoryDecl>(
10
Assuming null pointer is passed into cast
11
Passing null pointer value via 1st parameter 'Cat'
12
Calling 'ObjCCategoriesVisitor::add'
4244 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4245 return true;
4246 }
4247 };
4248
4249} // namespace
4250
4251void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4252 ObjCInterfaceDecl *D,
4253 unsigned PreviousGeneration) {
4254 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4255 PreviousGeneration);
4256 ModuleMgr.visit(Visitor);
4257}
4258
4259template<typename DeclT, typename Fn>
4260static void forAllLaterRedecls(DeclT *D, Fn F) {
4261 F(D);
4262
4263 // Check whether we've already merged D into its redeclaration chain.
4264 // MostRecent may or may not be nullptr if D has not been merged. If
4265 // not, walk the merged redecl chain and see if it's there.
4266 auto *MostRecent = D->getMostRecentDecl();
4267 bool Found = false;
4268 for (auto *Redecl = MostRecent; Redecl && !Found;
4269 Redecl = Redecl->getPreviousDecl())
4270 Found = (Redecl == D);
4271
4272 // If this declaration is merged, apply the functor to all later decls.
4273 if (Found) {
4274 for (auto *Redecl = MostRecent; Redecl != D;
4275 Redecl = Redecl->getPreviousDecl())
4276 F(Redecl);
4277 }
4278}
4279
4280void ASTDeclReader::UpdateDecl(Decl *D,
4281 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4282 while (Record.getIdx() < Record.size()) {
4283 switch ((DeclUpdateKind)Record.readInt()) {
4284 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4285 auto *RD = cast<CXXRecordDecl>(D);
4286 // FIXME: If we also have an update record for instantiating the
4287 // definition of D, we need that to happen before we get here.
4288 Decl *MD = Record.readDecl();
4289 assert(MD && "couldn't read decl from update record")((MD && "couldn't read decl from update record") ? static_cast
<void> (0) : __assert_fail ("MD && \"couldn't read decl from update record\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4289, __PRETTY_FUNCTION__))
;
4290 // FIXME: We should call addHiddenDecl instead, to add the member
4291 // to its DeclContext.
4292 RD->addedMember(MD);
4293 break;
4294 }
4295
4296 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4297 // It will be added to the template's lazy specialization set.
4298 PendingLazySpecializationIDs.push_back(readDeclID());
4299 break;
4300
4301 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4302 auto *Anon = readDeclAs<NamespaceDecl>();
4303
4304 // Each module has its own anonymous namespace, which is disjoint from
4305 // any other module's anonymous namespaces, so don't attach the anonymous
4306 // namespace at all.
4307 if (!Record.isModule()) {
4308 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4309 TU->setAnonymousNamespace(Anon);
4310 else
4311 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4312 }
4313 break;
4314 }
4315
4316 case UPD_CXX_ADDED_VAR_DEFINITION: {
4317 auto *VD = cast<VarDecl>(D);
4318 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4319 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4320 uint64_t Val = Record.readInt();
4321 if (Val && !VD->getInit()) {
4322 VD->setInit(Record.readExpr());
4323 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4324 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4325 Eval->CheckedICE = true;
4326 Eval->IsICE = Val == 3;
4327 }
4328 }
4329 break;
4330 }
4331
4332 case UPD_CXX_POINT_OF_INSTANTIATION: {
4333 SourceLocation POI = Record.readSourceLocation();
4334 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4335 VTSD->setPointOfInstantiation(POI);
4336 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4337 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4338 } else {
4339 auto *FD = cast<FunctionDecl>(D);
4340 if (auto *FTSInfo = FD->TemplateOrSpecialization
4341 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4342 FTSInfo->setPointOfInstantiation(POI);
4343 else
4344 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4345 ->setPointOfInstantiation(POI);
4346 }
4347 break;
4348 }
4349
4350 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4351 auto *Param = cast<ParmVarDecl>(D);
4352
4353 // We have to read the default argument regardless of whether we use it
4354 // so that hypothetical further update records aren't messed up.
4355 // TODO: Add a function to skip over the next expr record.
4356 auto *DefaultArg = Record.readExpr();
4357
4358 // Only apply the update if the parameter still has an uninstantiated
4359 // default argument.
4360 if (Param->hasUninstantiatedDefaultArg())
4361 Param->setDefaultArg(DefaultArg);
4362 break;
4363 }
4364
4365 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4366 auto *FD = cast<FieldDecl>(D);
4367 auto *DefaultInit = Record.readExpr();
4368
4369 // Only apply the update if the field still has an uninstantiated
4370 // default member initializer.
4371 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4372 if (DefaultInit)
4373 FD->setInClassInitializer(DefaultInit);
4374 else
4375 // Instantiation failed. We can get here if we serialized an AST for
4376 // an invalid program.
4377 FD->removeInClassInitializer();
4378 }
4379 break;
4380 }
4381
4382 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4383 auto *FD = cast<FunctionDecl>(D);
4384 if (Reader.PendingBodies[FD]) {
4385 // FIXME: Maybe check for ODR violations.
4386 // It's safe to stop now because this update record is always last.
4387 return;
4388 }
4389
4390 if (Record.readInt()) {
4391 // Maintain AST consistency: any later redeclarations of this function
4392 // are inline if this one is. (We might have merged another declaration
4393 // into this one.)
4394 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4395 FD->setImplicitlyInline();
4396 });
4397 }
4398 FD->setInnerLocStart(readSourceLocation());
4399 ReadFunctionDefinition(FD);
4400 assert(Record.getIdx() == Record.size() && "lazy body must be last")((Record.getIdx() == Record.size() && "lazy body must be last"
) ? static_cast<void> (0) : __assert_fail ("Record.getIdx() == Record.size() && \"lazy body must be last\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4400, __PRETTY_FUNCTION__))
;
4401 break;
4402 }
4403
4404 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4405 auto *RD = cast<CXXRecordDecl>(D);
4406 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4407 bool HadRealDefinition =
4408 OldDD && (OldDD->Definition != RD ||
4409 !Reader.PendingFakeDefinitionData.count(OldDD));
4410 RD->setParamDestroyedInCallee(Record.readInt());
4411 RD->setArgPassingRestrictions(
4412 (RecordDecl::ArgPassingKind)Record.readInt());
4413 ReadCXXRecordDefinition(RD, /*Update*/true);
4414
4415 // Visible update is handled separately.
4416 uint64_t LexicalOffset = ReadLocalOffset();
4417 if (!HadRealDefinition && LexicalOffset) {
4418 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4419 Reader.PendingFakeDefinitionData.erase(OldDD);
4420 }
4421
4422 auto TSK = (TemplateSpecializationKind)Record.readInt();
4423 SourceLocation POI = readSourceLocation();
4424 if (MemberSpecializationInfo *MSInfo =
4425 RD->getMemberSpecializationInfo()) {
4426 MSInfo->setTemplateSpecializationKind(TSK);
4427 MSInfo->setPointOfInstantiation(POI);
4428 } else {
4429 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4430 Spec->setTemplateSpecializationKind(TSK);
4431 Spec->setPointOfInstantiation(POI);
4432
4433 if (Record.readInt()) {
4434 auto *PartialSpec =
4435 readDeclAs<ClassTemplatePartialSpecializationDecl>();
4436 SmallVector<TemplateArgument, 8> TemplArgs;
4437 Record.readTemplateArgumentList(TemplArgs);
4438 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4439 Reader.getContext(), TemplArgs);
4440
4441 // FIXME: If we already have a partial specialization set,
4442 // check that it matches.
4443 if (!Spec->getSpecializedTemplateOrPartial()
4444 .is<ClassTemplatePartialSpecializationDecl *>())
4445 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4446 }
4447 }
4448
4449 RD->setTagKind((TagTypeKind)Record.readInt());
4450 RD->setLocation(readSourceLocation());
4451 RD->setLocStart(readSourceLocation());
4452 RD->setBraceRange(readSourceRange());
4453
4454 if (Record.readInt()) {
4455 AttrVec Attrs;
4456 Record.readAttributes(Attrs);
4457 // If the declaration already has attributes, we assume that some other
4458 // AST file already loaded them.
4459 if (!D->hasAttrs())
4460 D->setAttrsImpl(Attrs, Reader.getContext());
4461 }
4462 break;
4463 }
4464
4465 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4466 // Set the 'operator delete' directly to avoid emitting another update
4467 // record.
4468 auto *Del = readDeclAs<FunctionDecl>();
4469 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4470 auto *ThisArg = Record.readExpr();
4471 // FIXME: Check consistency if we have an old and new operator delete.
4472 if (!First->OperatorDelete) {
4473 First->OperatorDelete = Del;
4474 First->OperatorDeleteThisArg = ThisArg;
4475 }
4476 break;
4477 }
4478
4479 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4480 SmallVector<QualType, 8> ExceptionStorage;
4481 auto ESI = Record.readExceptionSpecInfo(ExceptionStorage);
4482
4483 // Update this declaration's exception specification, if needed.
4484 auto *FD = cast<FunctionDecl>(D);
4485 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4486 // FIXME: If the exception specification is already present, check that it
4487 // matches.
4488 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4489 FD->setType(Reader.getContext().getFunctionType(
4490 FPT->getReturnType(), FPT->getParamTypes(),
4491 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4492
4493 // When we get to the end of deserializing, see if there are other decls
4494 // that we need to propagate this exception specification onto.
4495 Reader.PendingExceptionSpecUpdates.insert(
4496 std::make_pair(FD->getCanonicalDecl(), FD));
4497 }
4498 break;
4499 }
4500
4501 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4502 auto *FD = cast<FunctionDecl>(D);
4503 QualType DeducedResultType = Record.readType();
4504 Reader.PendingDeducedTypeUpdates.insert(
4505 {FD->getCanonicalDecl(), DeducedResultType});
4506 break;
4507 }
4508
4509 case UPD_DECL_MARKED_USED:
4510 // Maintain AST consistency: any later redeclarations are used too.
4511 D->markUsed(Reader.getContext());
4512 break;
4513
4514 case UPD_MANGLING_NUMBER:
4515 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4516 Record.readInt());
4517 break;
4518
4519 case UPD_STATIC_LOCAL_NUMBER:
4520 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4521 Record.readInt());
4522 break;
4523
4524 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4525 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
4526 Reader.getContext(), readSourceRange(),
4527 AttributeCommonInfo::AS_Pragma));
4528 break;
4529
4530 case UPD_DECL_MARKED_OPENMP_ALLOCATE: {
4531 auto AllocatorKind =
4532 static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(Record.readInt());
4533 Expr *Allocator = Record.readExpr();
4534 SourceRange SR = readSourceRange();
4535 D->addAttr(OMPAllocateDeclAttr::CreateImplicit(
4536 Reader.getContext(), AllocatorKind, Allocator, SR,
4537 AttributeCommonInfo::AS_Pragma));
4538 break;
4539 }
4540
4541 case UPD_DECL_EXPORTED: {
4542 unsigned SubmoduleID = readSubmoduleID();
4543 auto *Exported = cast<NamedDecl>(D);
4544 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4545 Reader.getContext().mergeDefinitionIntoModule(Exported, Owner);
4546 Reader.PendingMergedDefinitionsToDeduplicate.insert(Exported);
4547 break;
4548 }
4549
4550 case UPD_DECL_MARKED_OPENMP_DECLARETARGET: {
4551 OMPDeclareTargetDeclAttr::MapTypeTy MapType =
4552 static_cast<OMPDeclareTargetDeclAttr::MapTypeTy>(Record.readInt());
4553 OMPDeclareTargetDeclAttr::DevTypeTy DevType =
4554 static_cast<OMPDeclareTargetDeclAttr::DevTypeTy>(Record.readInt());
4555 D->addAttr(OMPDeclareTargetDeclAttr::CreateImplicit(
4556 Reader.getContext(), MapType, DevType, readSourceRange(),
4557 AttributeCommonInfo::AS_Pragma));
4558 break;
4559 }
4560
4561 case UPD_ADDED_ATTR_TO_RECORD:
4562 AttrVec Attrs;
4563 Record.readAttributes(Attrs);
4564 assert(Attrs.size() == 1)((Attrs.size() == 1) ? static_cast<void> (0) : __assert_fail
("Attrs.size() == 1", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4564, __PRETTY_FUNCTION__))
;
4565 D->addAttr(Attrs[0]);
4566 break;
4567 }
4568 }
4569}