Bug Summary

File:tools/clang/lib/Serialization/MultiOnDiskHashTable.h
Warning:line 222, column 11
Potential memory leak

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-eagerly-assume -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 -mrelocation-model pic -pic-level 2 -mthread-model posix -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn338205/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/include -internal-externc-isystem /usr/lib/gcc/x86_64-linux-gnu/8/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-class-memaccess -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/lib/Serialization -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-07-29-043837-17923-1 -x c++ /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp -faddrsig

/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp

1//===- ASTReaderDecl.cpp - Decl Deserialization ---------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the ASTReader::ReadDeclRecord method, which is the
11// entrypoint for loading a decl.
12//
13//===----------------------------------------------------------------------===//
14
15#include "ASTCommon.h"
16#include "ASTReaderInternals.h"
17#include "clang/AST/ASTContext.h"
18#include "clang/AST/Attr.h"
19#include "clang/AST/AttrIterator.h"
20#include "clang/AST/Decl.h"
21#include "clang/AST/DeclBase.h"
22#include "clang/AST/DeclCXX.h"
23#include "clang/AST/DeclFriend.h"
24#include "clang/AST/DeclObjC.h"
25#include "clang/AST/DeclOpenMP.h"
26#include "clang/AST/DeclTemplate.h"
27#include "clang/AST/DeclVisitor.h"
28#include "clang/AST/DeclarationName.h"
29#include "clang/AST/Expr.h"
30#include "clang/AST/ExternalASTSource.h"
31#include "clang/AST/LambdaCapture.h"
32#include "clang/AST/NestedNameSpecifier.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/Sema/SemaDiagnostic.h"
51#include "clang/Serialization/ASTBitCodes.h"
52#include "clang/Serialization/ASTReader.h"
53#include "clang/Serialization/ContinuousRangeMap.h"
54#include "clang/Serialization/Module.h"
55#include "llvm/ADT/DenseMap.h"
56#include "llvm/ADT/FoldingSet.h"
57#include "llvm/ADT/STLExtras.h"
58#include "llvm/ADT/SmallPtrSet.h"
59#include "llvm/ADT/SmallVector.h"
60#include "llvm/ADT/iterator_range.h"
61#include "llvm/Bitcode/BitstreamReader.h"
62#include "llvm/Support/Casting.h"
63#include "llvm/Support/ErrorHandling.h"
64#include "llvm/Support/SaveAndRestore.h"
65#include <algorithm>
66#include <cassert>
67#include <cstdint>
68#include <cstring>
69#include <string>
70#include <utility>
71
72using namespace clang;
73using namespace serialization;
74
75//===----------------------------------------------------------------------===//
76// Declaration deserialization
77//===----------------------------------------------------------------------===//
78
79namespace clang {
80
81 class ASTDeclReader : public DeclVisitor<ASTDeclReader, void> {
82 ASTReader &Reader;
83 ASTRecordReader &Record;
84 ASTReader::RecordLocation Loc;
85 const DeclID ThisDeclID;
86 const SourceLocation ThisDeclLoc;
87
88 using RecordData = ASTReader::RecordData;
89
90 TypeID DeferredTypeID = 0;
91 unsigned AnonymousDeclNumber;
92 GlobalDeclID NamedDeclForTagDecl = 0;
93 IdentifierInfo *TypedefNameForLinkage = nullptr;
94
95 bool HasPendingBody = false;
96
97 ///A flag to carry the information for a decl from the entity is
98 /// used. We use it to delay the marking of the canonical decl as used until
99 /// the entire declaration is deserialized and merged.
100 bool IsDeclMarkedUsed = false;
101
102 uint64_t GetCurrentCursorOffset();
103
104 uint64_t ReadLocalOffset() {
105 uint64_t LocalOffset = Record.readInt();
106 assert(LocalOffset < Loc.Offset && "offset point after current record")(static_cast <bool> (LocalOffset < Loc.Offset &&
"offset point after current record") ? void (0) : __assert_fail
("LocalOffset < Loc.Offset && \"offset point after current record\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 106, __extension__ __PRETTY_FUNCTION__))
;
107 return LocalOffset ? Loc.Offset - LocalOffset : 0;
108 }
109
110 uint64_t ReadGlobalOffset() {
111 uint64_t Local = ReadLocalOffset();
112 return Local ? Record.getGlobalBitOffset(Local) : 0;
113 }
114
115 SourceLocation ReadSourceLocation() {
116 return Record.readSourceLocation();
117 }
118
119 SourceRange ReadSourceRange() {
120 return Record.readSourceRange();
121 }
122
123 TypeSourceInfo *GetTypeSourceInfo() {
124 return Record.getTypeSourceInfo();
125 }
126
127 serialization::DeclID ReadDeclID() {
128 return Record.readDeclID();
129 }
130
131 std::string ReadString() {
132 return Record.readString();
133 }
134
135 void ReadDeclIDList(SmallVectorImpl<DeclID> &IDs) {
136 for (unsigned I = 0, Size = Record.readInt(); I != Size; ++I)
137 IDs.push_back(ReadDeclID());
138 }
139
140 Decl *ReadDecl() {
141 return Record.readDecl();
142 }
143
144 template<typename T>
145 T *ReadDeclAs() {
146 return Record.readDeclAs<T>();
147 }
148
149 void ReadQualifierInfo(QualifierInfo &Info) {
150 Record.readQualifierInfo(Info);
151 }
152
153 void ReadDeclarationNameLoc(DeclarationNameLoc &DNLoc, DeclarationName Name) {
154 Record.readDeclarationNameLoc(DNLoc, Name);
155 }
156
157 serialization::SubmoduleID readSubmoduleID() {
158 if (Record.getIdx() == Record.size())
159 return 0;
160
161 return Record.getGlobalSubmoduleID(Record.readInt());
162 }
163
164 Module *readModule() {
165 return Record.getSubmodule(readSubmoduleID());
166 }
167
168 void ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update);
169 void ReadCXXDefinitionData(struct CXXRecordDecl::DefinitionData &Data,
170 const CXXRecordDecl *D);
171 void MergeDefinitionData(CXXRecordDecl *D,
172 struct CXXRecordDecl::DefinitionData &&NewDD);
173 void ReadObjCDefinitionData(struct ObjCInterfaceDecl::DefinitionData &Data);
174 void MergeDefinitionData(ObjCInterfaceDecl *D,
175 struct ObjCInterfaceDecl::DefinitionData &&NewDD);
176 void ReadObjCDefinitionData(struct ObjCProtocolDecl::DefinitionData &Data);
177 void MergeDefinitionData(ObjCProtocolDecl *D,
178 struct ObjCProtocolDecl::DefinitionData &&NewDD);
179
180 static DeclContext *getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC);
181
182 static NamedDecl *getAnonymousDeclForMerging(ASTReader &Reader,
183 DeclContext *DC,
184 unsigned Index);
185 static void setAnonymousDeclForMerging(ASTReader &Reader, DeclContext *DC,
186 unsigned Index, NamedDecl *D);
187
188 /// Results from loading a RedeclarableDecl.
189 class RedeclarableResult {
190 Decl *MergeWith;
191 GlobalDeclID FirstID;
192 bool IsKeyDecl;
193
194 public:
195 RedeclarableResult(Decl *MergeWith, GlobalDeclID FirstID, bool IsKeyDecl)
196 : MergeWith(MergeWith), FirstID(FirstID), IsKeyDecl(IsKeyDecl) {}
197
198 /// Retrieve the first ID.
199 GlobalDeclID getFirstID() const { return FirstID; }
200
201 /// Is this declaration a key declaration?
202 bool isKeyDecl() const { return IsKeyDecl; }
203
204 /// Get a known declaration that this should be merged with, if
205 /// any.
206 Decl *getKnownMergeTarget() const { return MergeWith; }
207 };
208
209 /// Class used to capture the result of searching for an existing
210 /// declaration of a specific kind and name, along with the ability
211 /// to update the place where this result was found (the declaration
212 /// chain hanging off an identifier or the DeclContext we searched in)
213 /// if requested.
214 class FindExistingResult {
215 ASTReader &Reader;
216 NamedDecl *New = nullptr;
217 NamedDecl *Existing = nullptr;
218 bool AddResult = false;
219 unsigned AnonymousDeclNumber = 0;
220 IdentifierInfo *TypedefNameForLinkage = nullptr;
221
222 public:
223 FindExistingResult(ASTReader &Reader) : Reader(Reader) {}
224
225 FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,
226 unsigned AnonymousDeclNumber,
227 IdentifierInfo *TypedefNameForLinkage)
228 : Reader(Reader), New(New), Existing(Existing), AddResult(true),
229 AnonymousDeclNumber(AnonymousDeclNumber),
230 TypedefNameForLinkage(TypedefNameForLinkage) {}
231
232 FindExistingResult(FindExistingResult &&Other)
233 : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),
234 AddResult(Other.AddResult),
235 AnonymousDeclNumber(Other.AnonymousDeclNumber),
236 TypedefNameForLinkage(Other.TypedefNameForLinkage) {
237 Other.AddResult = false;
238 }
239
240 FindExistingResult &operator=(FindExistingResult &&) = delete;
241 ~FindExistingResult();
242
243 /// Suppress the addition of this result into the known set of
244 /// names.
245 void suppress() { AddResult = false; }
246
247 operator NamedDecl*() const { return Existing; }
248
249 template<typename T>
250 operator T*() const { return dyn_cast_or_null<T>(Existing); }
251 };
252
253 static DeclContext *getPrimaryContextForMerging(ASTReader &Reader,
254 DeclContext *DC);
255 FindExistingResult findExisting(NamedDecl *D);
256
257 public:
258 ASTDeclReader(ASTReader &Reader, ASTRecordReader &Record,
259 ASTReader::RecordLocation Loc,
260 DeclID thisDeclID, SourceLocation ThisDeclLoc)
261 : Reader(Reader), Record(Record), Loc(Loc), ThisDeclID(thisDeclID),
262 ThisDeclLoc(ThisDeclLoc) {}
263
264 template <typename T> static
265 void AddLazySpecializations(T *D,
266 SmallVectorImpl<serialization::DeclID>& IDs) {
267 if (IDs.empty())
268 return;
269
270 // FIXME: We should avoid this pattern of getting the ASTContext.
271 ASTContext &C = D->getASTContext();
272
273 auto *&LazySpecializations = D->getCommonPtr()->LazySpecializations;
274
275 if (auto &Old = LazySpecializations) {
276 IDs.insert(IDs.end(), Old + 1, Old + 1 + Old[0]);
277 llvm::sort(IDs.begin(), IDs.end());
278 IDs.erase(std::unique(IDs.begin(), IDs.end()), IDs.end());
279 }
280
281 auto *Result = new (C) serialization::DeclID[1 + IDs.size()];
282 *Result = IDs.size();
283 std::copy(IDs.begin(), IDs.end(), Result + 1);
284
285 LazySpecializations = Result;
286 }
287
288 template <typename DeclT>
289 static Decl *getMostRecentDeclImpl(Redeclarable<DeclT> *D);
290 static Decl *getMostRecentDeclImpl(...);
291 static Decl *getMostRecentDecl(Decl *D);
292
293 template <typename DeclT>
294 static void attachPreviousDeclImpl(ASTReader &Reader,
295 Redeclarable<DeclT> *D, Decl *Previous,
296 Decl *Canon);
297 static void attachPreviousDeclImpl(ASTReader &Reader, ...);
298 static void attachPreviousDecl(ASTReader &Reader, Decl *D, Decl *Previous,
299 Decl *Canon);
300
301 template <typename DeclT>
302 static void attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest);
303 static void attachLatestDeclImpl(...);
304 static void attachLatestDecl(Decl *D, Decl *latest);
305
306 template <typename DeclT>
307 static void markIncompleteDeclChainImpl(Redeclarable<DeclT> *D);
308 static void markIncompleteDeclChainImpl(...);
309
310 /// Determine whether this declaration has a pending body.
311 bool hasPendingBody() const { return HasPendingBody; }
312
313 void ReadFunctionDefinition(FunctionDecl *FD);
314 void Visit(Decl *D);
315
316 void UpdateDecl(Decl *D, SmallVectorImpl<serialization::DeclID> &);
317
318 static void setNextObjCCategory(ObjCCategoryDecl *Cat,
319 ObjCCategoryDecl *Next) {
320 Cat->NextClassCategory = Next;
321 }
322
323 void VisitDecl(Decl *D);
324 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
325 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
326 void VisitTranslationUnitDecl(TranslationUnitDecl *TU);
327 void VisitNamedDecl(NamedDecl *ND);
328 void VisitLabelDecl(LabelDecl *LD);
329 void VisitNamespaceDecl(NamespaceDecl *D);
330 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
331 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
332 void VisitTypeDecl(TypeDecl *TD);
333 RedeclarableResult VisitTypedefNameDecl(TypedefNameDecl *TD);
334 void VisitTypedefDecl(TypedefDecl *TD);
335 void VisitTypeAliasDecl(TypeAliasDecl *TD);
336 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
337 RedeclarableResult VisitTagDecl(TagDecl *TD);
338 void VisitEnumDecl(EnumDecl *ED);
339 RedeclarableResult VisitRecordDeclImpl(RecordDecl *RD);
340 void VisitRecordDecl(RecordDecl *RD) { VisitRecordDeclImpl(RD); }
341 RedeclarableResult VisitCXXRecordDeclImpl(CXXRecordDecl *D);
342 void VisitCXXRecordDecl(CXXRecordDecl *D) { VisitCXXRecordDeclImpl(D); }
343 RedeclarableResult VisitClassTemplateSpecializationDeclImpl(
344 ClassTemplateSpecializationDecl *D);
345
346 void VisitClassTemplateSpecializationDecl(
347 ClassTemplateSpecializationDecl *D) {
348 VisitClassTemplateSpecializationDeclImpl(D);
349 }
350
351 void VisitClassTemplatePartialSpecializationDecl(
352 ClassTemplatePartialSpecializationDecl *D);
353 void VisitClassScopeFunctionSpecializationDecl(
354 ClassScopeFunctionSpecializationDecl *D);
355 RedeclarableResult
356 VisitVarTemplateSpecializationDeclImpl(VarTemplateSpecializationDecl *D);
357
358 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D) {
359 VisitVarTemplateSpecializationDeclImpl(D);
360 }
361
362 void VisitVarTemplatePartialSpecializationDecl(
363 VarTemplatePartialSpecializationDecl *D);
364 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
365 void VisitValueDecl(ValueDecl *VD);
366 void VisitEnumConstantDecl(EnumConstantDecl *ECD);
367 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
368 void VisitDeclaratorDecl(DeclaratorDecl *DD);
369 void VisitFunctionDecl(FunctionDecl *FD);
370 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *GD);
371 void VisitCXXMethodDecl(CXXMethodDecl *D);
372 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
373 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
374 void VisitCXXConversionDecl(CXXConversionDecl *D);
375 void VisitFieldDecl(FieldDecl *FD);
376 void VisitMSPropertyDecl(MSPropertyDecl *FD);
377 void VisitIndirectFieldDecl(IndirectFieldDecl *FD);
378 RedeclarableResult VisitVarDeclImpl(VarDecl *D);
379 void VisitVarDecl(VarDecl *VD) { VisitVarDeclImpl(VD); }
380 void VisitImplicitParamDecl(ImplicitParamDecl *PD);
381 void VisitParmVarDecl(ParmVarDecl *PD);
382 void VisitDecompositionDecl(DecompositionDecl *DD);
383 void VisitBindingDecl(BindingDecl *BD);
384 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
385 DeclID VisitTemplateDecl(TemplateDecl *D);
386 RedeclarableResult VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
387 void VisitClassTemplateDecl(ClassTemplateDecl *D);
388 void VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D);
389 void VisitVarTemplateDecl(VarTemplateDecl *D);
390 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
391 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
392 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
393 void VisitUsingDecl(UsingDecl *D);
394 void VisitUsingPackDecl(UsingPackDecl *D);
395 void VisitUsingShadowDecl(UsingShadowDecl *D);
396 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
397 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
398 void VisitExportDecl(ExportDecl *D);
399 void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
400 void VisitImportDecl(ImportDecl *D);
401 void VisitAccessSpecDecl(AccessSpecDecl *D);
402 void VisitFriendDecl(FriendDecl *D);
403 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
404 void VisitStaticAssertDecl(StaticAssertDecl *D);
405 void VisitBlockDecl(BlockDecl *BD);
406 void VisitCapturedDecl(CapturedDecl *CD);
407 void VisitEmptyDecl(EmptyDecl *D);
408
409 std::pair<uint64_t, uint64_t> VisitDeclContext(DeclContext *DC);
410
411 template<typename T>
412 RedeclarableResult VisitRedeclarable(Redeclarable<T> *D);
413
414 template<typename T>
415 void mergeRedeclarable(Redeclarable<T> *D, RedeclarableResult &Redecl,
416 DeclID TemplatePatternID = 0);
417
418 template<typename T>
419 void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
420 RedeclarableResult &Redecl,
421 DeclID TemplatePatternID = 0);
422
423 template<typename T>
424 void mergeMergeable(Mergeable<T> *D);
425
426 void mergeTemplatePattern(RedeclarableTemplateDecl *D,
427 RedeclarableTemplateDecl *Existing,
428 DeclID DsID, bool IsKeyDecl);
429
430 ObjCTypeParamList *ReadObjCTypeParamList();
431
432 // FIXME: Reorder according to DeclNodes.td?
433 void VisitObjCMethodDecl(ObjCMethodDecl *D);
434 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
435 void VisitObjCContainerDecl(ObjCContainerDecl *D);
436 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
437 void VisitObjCIvarDecl(ObjCIvarDecl *D);
438 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
439 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
440 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
441 void VisitObjCImplDecl(ObjCImplDecl *D);
442 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
443 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
444 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
445 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
446 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
447 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
448 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
449 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
450 };
451
452} // namespace clang
453
454namespace {
455
456/// Iterator over the redeclarations of a declaration that have already
457/// been merged into the same redeclaration chain.
458template<typename DeclT>
459class MergedRedeclIterator {
460 DeclT *Start;
461 DeclT *Canonical = nullptr;
462 DeclT *Current = nullptr;
463
464public:
465 MergedRedeclIterator() = default;
466 MergedRedeclIterator(DeclT *Start) : Start(Start), Current(Start) {}
467
468 DeclT *operator*() { return Current; }
469
470 MergedRedeclIterator &operator++() {
471 if (Current->isFirstDecl()) {
472 Canonical = Current;
473 Current = Current->getMostRecentDecl();
474 } else
475 Current = Current->getPreviousDecl();
476
477 // If we started in the merged portion, we'll reach our start position
478 // eventually. Otherwise, we'll never reach it, but the second declaration
479 // we reached was the canonical declaration, so stop when we see that one
480 // again.
481 if (Current == Start || Current == Canonical)
482 Current = nullptr;
483 return *this;
484 }
485
486 friend bool operator!=(const MergedRedeclIterator &A,
487 const MergedRedeclIterator &B) {
488 return A.Current != B.Current;
489 }
490};
491
492} // namespace
493
494template <typename DeclT>
495static llvm::iterator_range<MergedRedeclIterator<DeclT>>
496merged_redecls(DeclT *D) {
497 return llvm::make_range(MergedRedeclIterator<DeclT>(D),
498 MergedRedeclIterator<DeclT>());
499}
500
501uint64_t ASTDeclReader::GetCurrentCursorOffset() {
502 return Loc.F->DeclsCursor.GetCurrentBitNo() + Loc.F->GlobalBitOffset;
503}
504
505void ASTDeclReader::ReadFunctionDefinition(FunctionDecl *FD) {
506 if (Record.readInt())
507 Reader.DefinitionSource[FD] = Loc.F->Kind == ModuleKind::MK_MainFile;
508 if (auto *CD = dyn_cast<CXXConstructorDecl>(FD)) {
509 CD->NumCtorInitializers = Record.readInt();
510 if (CD->NumCtorInitializers)
511 CD->CtorInitializers = ReadGlobalOffset();
512 }
513 // Store the offset of the body so we can lazily load it later.
514 Reader.PendingBodies[FD] = GetCurrentCursorOffset();
515 HasPendingBody = true;
516}
517
518void ASTDeclReader::Visit(Decl *D) {
519 DeclVisitor<ASTDeclReader, void>::Visit(D);
520
521 // At this point we have deserialized and merged the decl and it is safe to
522 // update its canonical decl to signal that the entire entity is used.
523 D->getCanonicalDecl()->Used |= IsDeclMarkedUsed;
524 IsDeclMarkedUsed = false;
525
526 if (auto *DD = dyn_cast<DeclaratorDecl>(D)) {
527 if (auto *TInfo = DD->getTypeSourceInfo())
528 Record.readTypeLoc(TInfo->getTypeLoc());
529 }
530
531 if (auto *TD = dyn_cast<TypeDecl>(D)) {
532 // We have a fully initialized TypeDecl. Read its type now.
533 TD->setTypeForDecl(Reader.GetType(DeferredTypeID).getTypePtrOrNull());
534
535 // If this is a tag declaration with a typedef name for linkage, it's safe
536 // to load that typedef now.
537 if (NamedDeclForTagDecl)
538 cast<TagDecl>(D)->TypedefNameDeclOrQualifier =
539 cast<TypedefNameDecl>(Reader.GetDecl(NamedDeclForTagDecl));
540 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
541 // if we have a fully initialized TypeDecl, we can safely read its type now.
542 ID->TypeForDecl = Reader.GetType(DeferredTypeID).getTypePtrOrNull();
543 } else if (auto *FD = dyn_cast<FunctionDecl>(D)) {
544 if (DeferredTypeID)
545 FD->setType(Reader.GetType(DeferredTypeID));
546
547 // FunctionDecl's body was written last after all other Stmts/Exprs.
548 // We only read it if FD doesn't already have a body (e.g., from another
549 // module).
550 // FIXME: Can we diagnose ODR violations somehow?
551 if (Record.readInt())
552 ReadFunctionDefinition(FD);
553 }
554}
555
556void ASTDeclReader::VisitDecl(Decl *D) {
557 if (D->isTemplateParameter() || D->isTemplateParameterPack() ||
558 isa<ParmVarDecl>(D)) {
559 // We don't want to deserialize the DeclContext of a template
560 // parameter or of a parameter of a function template immediately. These
561 // entities might be used in the formulation of its DeclContext (for
562 // example, a function parameter can be used in decltype() in trailing
563 // return type of the function). Use the translation unit DeclContext as a
564 // placeholder.
565 GlobalDeclID SemaDCIDForTemplateParmDecl = ReadDeclID();
566 GlobalDeclID LexicalDCIDForTemplateParmDecl = ReadDeclID();
567 if (!LexicalDCIDForTemplateParmDecl)
568 LexicalDCIDForTemplateParmDecl = SemaDCIDForTemplateParmDecl;
569 Reader.addPendingDeclContextInfo(D,
570 SemaDCIDForTemplateParmDecl,
571 LexicalDCIDForTemplateParmDecl);
572 D->setDeclContext(Reader.getContext().getTranslationUnitDecl());
573 } else {
574 auto *SemaDC = ReadDeclAs<DeclContext>();
575 auto *LexicalDC = ReadDeclAs<DeclContext>();
576 if (!LexicalDC)
577 LexicalDC = SemaDC;
578 DeclContext *MergedSemaDC = Reader.MergedDeclContexts.lookup(SemaDC);
579 // Avoid calling setLexicalDeclContext() directly because it uses
580 // Decl::getASTContext() internally which is unsafe during derialization.
581 D->setDeclContextsImpl(MergedSemaDC ? MergedSemaDC : SemaDC, LexicalDC,
582 Reader.getContext());
583 }
584 D->setLocation(ThisDeclLoc);
585 D->setInvalidDecl(Record.readInt());
586 if (Record.readInt()) { // hasAttrs
587 AttrVec Attrs;
588 Record.readAttributes(Attrs);
589 // Avoid calling setAttrs() directly because it uses Decl::getASTContext()
590 // internally which is unsafe during derialization.
591 D->setAttrsImpl(Attrs, Reader.getContext());
592 }
593 D->setImplicit(Record.readInt());
594 D->Used = Record.readInt();
595 IsDeclMarkedUsed |= D->Used;
596 D->setReferenced(Record.readInt());
597 D->setTopLevelDeclInObjCContainer(Record.readInt());
598 D->setAccess((AccessSpecifier)Record.readInt());
599 D->FromASTFile = true;
600 bool ModulePrivate = Record.readInt();
601
602 // Determine whether this declaration is part of a (sub)module. If so, it
603 // may not yet be visible.
604 if (unsigned SubmoduleID = readSubmoduleID()) {
605 // Store the owning submodule ID in the declaration.
606 D->setModuleOwnershipKind(
607 ModulePrivate ? Decl::ModuleOwnershipKind::ModulePrivate
608 : Decl::ModuleOwnershipKind::VisibleWhenImported);
609 D->setOwningModuleID(SubmoduleID);
610
611 if (ModulePrivate) {
612 // Module-private declarations are never visible, so there is no work to
613 // do.
614 } else if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
615 // If local visibility is being tracked, this declaration will become
616 // hidden and visible as the owning module does.
617 } else if (Module *Owner = Reader.getSubmodule(SubmoduleID)) {
618 // Mark the declaration as visible when its owning module becomes visible.
619 if (Owner->NameVisibility == Module::AllVisible)
620 D->setVisibleDespiteOwningModule();
621 else
622 Reader.HiddenNamesMap[Owner].push_back(D);
623 }
624 } else if (ModulePrivate) {
625 D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate);
626 }
627}
628
629void ASTDeclReader::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
630 VisitDecl(D);
631 D->setLocation(ReadSourceLocation());
632 D->CommentKind = (PragmaMSCommentKind)Record.readInt();
633 std::string Arg = ReadString();
634 memcpy(D->getTrailingObjects<char>(), Arg.data(), Arg.size());
635 D->getTrailingObjects<char>()[Arg.size()] = '\0';
636}
637
638void ASTDeclReader::VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D) {
639 VisitDecl(D);
640 D->setLocation(ReadSourceLocation());
641 std::string Name = ReadString();
642 memcpy(D->getTrailingObjects<char>(), Name.data(), Name.size());
643 D->getTrailingObjects<char>()[Name.size()] = '\0';
644
645 D->ValueStart = Name.size() + 1;
646 std::string Value = ReadString();
647 memcpy(D->getTrailingObjects<char>() + D->ValueStart, Value.data(),
648 Value.size());
649 D->getTrailingObjects<char>()[D->ValueStart + Value.size()] = '\0';
650}
651
652void ASTDeclReader::VisitTranslationUnitDecl(TranslationUnitDecl *TU) {
653 llvm_unreachable("Translation units are not serialized")::llvm::llvm_unreachable_internal("Translation units are not serialized"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 653)
;
654}
655
656void ASTDeclReader::VisitNamedDecl(NamedDecl *ND) {
657 VisitDecl(ND);
658 ND->setDeclName(Record.readDeclarationName());
659 AnonymousDeclNumber = Record.readInt();
660}
661
662void ASTDeclReader::VisitTypeDecl(TypeDecl *TD) {
663 VisitNamedDecl(TD);
664 TD->setLocStart(ReadSourceLocation());
665 // Delay type reading until after we have fully initialized the decl.
666 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
667}
668
669ASTDeclReader::RedeclarableResult
670ASTDeclReader::VisitTypedefNameDecl(TypedefNameDecl *TD) {
671 RedeclarableResult Redecl = VisitRedeclarable(TD);
672 VisitTypeDecl(TD);
673 TypeSourceInfo *TInfo = GetTypeSourceInfo();
674 if (Record.readInt()) { // isModed
675 QualType modedT = Record.readType();
676 TD->setModedTypeSourceInfo(TInfo, modedT);
677 } else
678 TD->setTypeSourceInfo(TInfo);
679 // Read and discard the declaration for which this is a typedef name for
680 // linkage, if it exists. We cannot rely on our type to pull in this decl,
681 // because it might have been merged with a type from another module and
682 // thus might not refer to our version of the declaration.
683 ReadDecl();
684 return Redecl;
685}
686
687void ASTDeclReader::VisitTypedefDecl(TypedefDecl *TD) {
688 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
689 mergeRedeclarable(TD, Redecl);
690}
691
692void ASTDeclReader::VisitTypeAliasDecl(TypeAliasDecl *TD) {
693 RedeclarableResult Redecl = VisitTypedefNameDecl(TD);
694 if (auto *Template = ReadDeclAs<TypeAliasTemplateDecl>())
695 // Merged when we merge the template.
696 TD->setDescribedAliasTemplate(Template);
697 else
698 mergeRedeclarable(TD, Redecl);
699}
700
701ASTDeclReader::RedeclarableResult ASTDeclReader::VisitTagDecl(TagDecl *TD) {
702 RedeclarableResult Redecl = VisitRedeclarable(TD);
703 VisitTypeDecl(TD);
704
705 TD->IdentifierNamespace = Record.readInt();
706 TD->setTagKind((TagDecl::TagKind)Record.readInt());
707 if (!isa<CXXRecordDecl>(TD))
708 TD->setCompleteDefinition(Record.readInt());
709 TD->setEmbeddedInDeclarator(Record.readInt());
710 TD->setFreeStanding(Record.readInt());
711 TD->setCompleteDefinitionRequired(Record.readInt());
712 TD->setBraceRange(ReadSourceRange());
713
714 switch (Record.readInt()) {
715 case 0:
716 break;
717 case 1: { // ExtInfo
718 auto *Info = new (Reader.getContext()) TagDecl::ExtInfo();
719 ReadQualifierInfo(*Info);
720 TD->TypedefNameDeclOrQualifier = Info;
721 break;
722 }
723 case 2: // TypedefNameForAnonDecl
724 NamedDeclForTagDecl = ReadDeclID();
725 TypedefNameForLinkage = Record.getIdentifierInfo();
726 break;
727 default:
728 llvm_unreachable("unexpected tag info kind")::llvm::llvm_unreachable_internal("unexpected tag info kind",
"/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 728)
;
729 }
730
731 if (!isa<CXXRecordDecl>(TD))
732 mergeRedeclarable(TD, Redecl);
733 return Redecl;
734}
735
736void ASTDeclReader::VisitEnumDecl(EnumDecl *ED) {
737 VisitTagDecl(ED);
738 if (TypeSourceInfo *TI = GetTypeSourceInfo())
739 ED->setIntegerTypeSourceInfo(TI);
740 else
741 ED->setIntegerType(Record.readType());
742 ED->setPromotionType(Record.readType());
743 ED->setNumPositiveBits(Record.readInt());
744 ED->setNumNegativeBits(Record.readInt());
745 ED->IsScoped = Record.readInt();
746 ED->IsScopedUsingClassTag = Record.readInt();
747 ED->IsFixed = Record.readInt();
748
749 ED->HasODRHash = true;
750 ED->ODRHash = Record.readInt();
751
752 // If this is a definition subject to the ODR, and we already have a
753 // definition, merge this one into it.
754 if (ED->IsCompleteDefinition &&
755 Reader.getContext().getLangOpts().Modules &&
756 Reader.getContext().getLangOpts().CPlusPlus) {
757 EnumDecl *&OldDef = Reader.EnumDefinitions[ED->getCanonicalDecl()];
758 if (!OldDef) {
759 // This is the first time we've seen an imported definition. Look for a
760 // local definition before deciding that we are the first definition.
761 for (auto *D : merged_redecls(ED->getCanonicalDecl())) {
762 if (!D->isFromASTFile() && D->isCompleteDefinition()) {
763 OldDef = D;
764 break;
765 }
766 }
767 }
768 if (OldDef) {
769 Reader.MergedDeclContexts.insert(std::make_pair(ED, OldDef));
770 ED->IsCompleteDefinition = false;
771 Reader.mergeDefinitionVisibility(OldDef, ED);
772 if (OldDef->getODRHash() != ED->getODRHash())
773 Reader.PendingEnumOdrMergeFailures[OldDef].push_back(ED);
774 } else {
775 OldDef = ED;
776 }
777 }
778
779 if (auto *InstED = ReadDeclAs<EnumDecl>()) {
780 auto TSK = (TemplateSpecializationKind)Record.readInt();
781 SourceLocation POI = ReadSourceLocation();
782 ED->setInstantiationOfMemberEnum(Reader.getContext(), InstED, TSK);
783 ED->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
784 }
785}
786
787ASTDeclReader::RedeclarableResult
788ASTDeclReader::VisitRecordDeclImpl(RecordDecl *RD) {
789 RedeclarableResult Redecl = VisitTagDecl(RD);
790 RD->setHasFlexibleArrayMember(Record.readInt());
791 RD->setAnonymousStructOrUnion(Record.readInt());
792 RD->setHasObjectMember(Record.readInt());
793 RD->setHasVolatileMember(Record.readInt());
794 RD->setNonTrivialToPrimitiveDefaultInitialize(Record.readInt());
795 RD->setNonTrivialToPrimitiveCopy(Record.readInt());
796 RD->setNonTrivialToPrimitiveDestroy(Record.readInt());
797 RD->setParamDestroyedInCallee(Record.readInt());
798 RD->setArgPassingRestrictions((RecordDecl::ArgPassingKind)Record.readInt());
799 return Redecl;
800}
801
802void ASTDeclReader::VisitValueDecl(ValueDecl *VD) {
803 VisitNamedDecl(VD);
804 // For function declarations, defer reading the type in case the function has
805 // a deduced return type that references an entity declared within the
806 // function.
807 if (isa<FunctionDecl>(VD))
808 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
809 else
810 VD->setType(Record.readType());
811}
812
813void ASTDeclReader::VisitEnumConstantDecl(EnumConstantDecl *ECD) {
814 VisitValueDecl(ECD);
815 if (Record.readInt())
816 ECD->setInitExpr(Record.readExpr());
817 ECD->setInitVal(Record.readAPSInt());
818 mergeMergeable(ECD);
819}
820
821void ASTDeclReader::VisitDeclaratorDecl(DeclaratorDecl *DD) {
822 VisitValueDecl(DD);
823 DD->setInnerLocStart(ReadSourceLocation());
824 if (Record.readInt()) { // hasExtInfo
825 auto *Info = new (Reader.getContext()) DeclaratorDecl::ExtInfo();
826 ReadQualifierInfo(*Info);
827 DD->DeclInfo = Info;
828 }
829 QualType TSIType = Record.readType();
830 DD->setTypeSourceInfo(
831 TSIType.isNull() ? nullptr
832 : Reader.getContext().CreateTypeSourceInfo(TSIType));
833}
834
835void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
836 RedeclarableResult Redecl = VisitRedeclarable(FD);
837 VisitDeclaratorDecl(FD);
838
839 // Attach a type to this function. Use the real type if possible, but fall
840 // back to the type as written if it involves a deduced return type.
841 if (FD->getTypeSourceInfo() &&
842 FD->getTypeSourceInfo()->getType()->castAs<FunctionType>()
843 ->getReturnType()->getContainedAutoType()) {
844 // We'll set up the real type in Visit, once we've finished loading the
845 // function.
846 FD->setType(FD->getTypeSourceInfo()->getType());
847 } else {
848 FD->setType(Reader.GetType(DeferredTypeID));
849 DeferredTypeID = 0;
850 }
851
852 ReadDeclarationNameLoc(FD->DNLoc, 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->SClass = (StorageClass)Record.readInt();
859 FD->IsInline = Record.readInt();
860 FD->IsInlineSpecified = Record.readInt();
861 FD->IsExplicitSpecified = Record.readInt();
862 FD->IsVirtualAsWritten = Record.readInt();
863 FD->IsPure = Record.readInt();
864 FD->HasInheritedPrototype = Record.readInt();
865 FD->HasWrittenPrototype = Record.readInt();
866 FD->IsDeleted = Record.readInt();
867 FD->IsTrivial = Record.readInt();
868 FD->IsTrivialForCall = Record.readInt();
869 FD->IsDefaulted = Record.readInt();
870 FD->IsExplicitlyDefaulted = Record.readInt();
871 FD->HasImplicitReturnZero = Record.readInt();
872 FD->IsConstexpr = Record.readInt();
873 FD->UsesSEHTry = Record.readInt();
874 FD->HasSkippedBody = Record.readInt();
875 FD->IsMultiVersion = Record.readInt();
876 FD->IsLateTemplateParsed = Record.readInt();
877 FD->setCachedLinkage(Linkage(Record.readInt()));
878 FD->EndRangeLoc = ReadSourceLocation();
879
880 FD->ODRHash = Record.readInt();
881 FD->HasODRHash = true;
882
883 switch ((FunctionDecl::TemplatedKind)Record.readInt()) {
884 case FunctionDecl::TK_NonTemplate:
885 mergeRedeclarable(FD, Redecl);
886 break;
887 case FunctionDecl::TK_FunctionTemplate:
888 // Merged when we merge the template.
889 FD->setDescribedFunctionTemplate(ReadDeclAs<FunctionTemplateDecl>());
890 break;
891 case FunctionDecl::TK_MemberSpecialization: {
892 auto *InstFD = ReadDeclAs<FunctionDecl>();
893 auto TSK = (TemplateSpecializationKind)Record.readInt();
894 SourceLocation POI = ReadSourceLocation();
895 FD->setInstantiationOfMemberFunction(Reader.getContext(), InstFD, TSK);
896 FD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
897 mergeRedeclarable(FD, Redecl);
898 break;
899 }
900 case FunctionDecl::TK_FunctionTemplateSpecialization: {
901 auto *Template = ReadDeclAs<FunctionTemplateDecl>();
902 auto TSK = (TemplateSpecializationKind)Record.readInt();
903
904 // Template arguments.
905 SmallVector<TemplateArgument, 8> TemplArgs;
906 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
907
908 // Template args as written.
909 SmallVector<TemplateArgumentLoc, 8> TemplArgLocs;
910 SourceLocation LAngleLoc, RAngleLoc;
911 bool HasTemplateArgumentsAsWritten = Record.readInt();
912 if (HasTemplateArgumentsAsWritten) {
913 unsigned NumTemplateArgLocs = Record.readInt();
914 TemplArgLocs.reserve(NumTemplateArgLocs);
915 for (unsigned i = 0; i != NumTemplateArgLocs; ++i)
916 TemplArgLocs.push_back(Record.readTemplateArgumentLoc());
917
918 LAngleLoc = ReadSourceLocation();
919 RAngleLoc = ReadSourceLocation();
920 }
921
922 SourceLocation POI = ReadSourceLocation();
923
924 ASTContext &C = Reader.getContext();
925 TemplateArgumentList *TemplArgList
926 = TemplateArgumentList::CreateCopy(C, TemplArgs);
927 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
928 for (unsigned i = 0, e = TemplArgLocs.size(); i != e; ++i)
929 TemplArgsInfo.addArgument(TemplArgLocs[i]);
930 FunctionTemplateSpecializationInfo *FTInfo
931 = FunctionTemplateSpecializationInfo::Create(C, FD, Template, TSK,
932 TemplArgList,
933 HasTemplateArgumentsAsWritten ? &TemplArgsInfo
934 : nullptr,
935 POI);
936 FD->TemplateOrSpecialization = FTInfo;
937
938 if (FD->isCanonicalDecl()) { // if canonical add to template's set.
939 // The template that contains the specializations set. It's not safe to
940 // use getCanonicalDecl on Template since it may still be initializing.
941 auto *CanonTemplate = ReadDeclAs<FunctionTemplateDecl>();
942 // Get the InsertPos by FindNodeOrInsertPos() instead of calling
943 // InsertNode(FTInfo) directly to avoid the getASTContext() call in
944 // FunctionTemplateSpecializationInfo's Profile().
945 // We avoid getASTContext because a decl in the parent hierarchy may
946 // be initializing.
947 llvm::FoldingSetNodeID ID;
948 FunctionTemplateSpecializationInfo::Profile(ID, TemplArgs, C);
949 void *InsertPos = nullptr;
950 FunctionTemplateDecl::Common *CommonPtr = CanonTemplate->getCommonPtr();
951 FunctionTemplateSpecializationInfo *ExistingInfo =
952 CommonPtr->Specializations.FindNodeOrInsertPos(ID, InsertPos);
953 if (InsertPos)
954 CommonPtr->Specializations.InsertNode(FTInfo, InsertPos);
955 else {
956 assert(Reader.getContext().getLangOpts().Modules &&(static_cast <bool> (Reader.getContext().getLangOpts().
Modules && "already deserialized this template specialization"
) ? void (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 957, __extension__ __PRETTY_FUNCTION__))
957 "already deserialized this template specialization")(static_cast <bool> (Reader.getContext().getLangOpts().
Modules && "already deserialized this template specialization"
) ? void (0) : __assert_fail ("Reader.getContext().getLangOpts().Modules && \"already deserialized this template specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 957, __extension__ __PRETTY_FUNCTION__))
;
958 mergeRedeclarable(FD, ExistingInfo->Function, Redecl);
959 }
960 }
961 break;
962 }
963 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
964 // Templates.
965 UnresolvedSet<8> TemplDecls;
966 unsigned NumTemplates = Record.readInt();
967 while (NumTemplates--)
968 TemplDecls.addDecl(ReadDeclAs<NamedDecl>());
969
970 // Templates args.
971 TemplateArgumentListInfo TemplArgs;
972 unsigned NumArgs = Record.readInt();
973 while (NumArgs--)
974 TemplArgs.addArgument(Record.readTemplateArgumentLoc());
975 TemplArgs.setLAngleLoc(ReadSourceLocation());
976 TemplArgs.setRAngleLoc(ReadSourceLocation());
977
978 FD->setDependentTemplateSpecialization(Reader.getContext(),
979 TemplDecls, TemplArgs);
980 // These are not merged; we don't need to merge redeclarations of dependent
981 // template friends.
982 break;
983 }
984 }
985
986 // Read in the parameters.
987 unsigned NumParams = Record.readInt();
988 SmallVector<ParmVarDecl *, 16> Params;
989 Params.reserve(NumParams);
990 for (unsigned I = 0; I != NumParams; ++I)
991 Params.push_back(ReadDeclAs<ParmVarDecl>());
992 FD->setParams(Reader.getContext(), Params);
993}
994
995void ASTDeclReader::VisitObjCMethodDecl(ObjCMethodDecl *MD) {
996 VisitNamedDecl(MD);
997 if (Record.readInt()) {
998 // Load the body on-demand. Most clients won't care, because method
999 // definitions rarely show up in headers.
1000 Reader.PendingBodies[MD] = GetCurrentCursorOffset();
1001 HasPendingBody = true;
1002 MD->setSelfDecl(ReadDeclAs<ImplicitParamDecl>());
1003 MD->setCmdDecl(ReadDeclAs<ImplicitParamDecl>());
1004 }
1005 MD->setInstanceMethod(Record.readInt());
1006 MD->setVariadic(Record.readInt());
1007 MD->setPropertyAccessor(Record.readInt());
1008 MD->setDefined(Record.readInt());
1009 MD->IsOverriding = Record.readInt();
1010 MD->HasSkippedBody = Record.readInt();
1011
1012 MD->IsRedeclaration = Record.readInt();
1013 MD->HasRedeclaration = Record.readInt();
1014 if (MD->HasRedeclaration)
1015 Reader.getContext().setObjCMethodRedeclaration(MD,
1016 ReadDeclAs<ObjCMethodDecl>());
1017
1018 MD->setDeclImplementation((ObjCMethodDecl::ImplementationControl)Record.readInt());
1019 MD->setObjCDeclQualifier((Decl::ObjCDeclQualifier)Record.readInt());
1020 MD->SetRelatedResultType(Record.readInt());
1021 MD->setReturnType(Record.readType());
1022 MD->setReturnTypeSourceInfo(GetTypeSourceInfo());
1023 MD->DeclEndLoc = ReadSourceLocation();
1024 unsigned NumParams = Record.readInt();
1025 SmallVector<ParmVarDecl *, 16> Params;
1026 Params.reserve(NumParams);
1027 for (unsigned I = 0; I != NumParams; ++I)
1028 Params.push_back(ReadDeclAs<ParmVarDecl>());
1029
1030 MD->SelLocsKind = Record.readInt();
1031 unsigned NumStoredSelLocs = Record.readInt();
1032 SmallVector<SourceLocation, 16> SelLocs;
1033 SelLocs.reserve(NumStoredSelLocs);
1034 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1035 SelLocs.push_back(ReadSourceLocation());
1036
1037 MD->setParamsAndSelLocs(Reader.getContext(), Params, SelLocs);
1038}
1039
1040void ASTDeclReader::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1041 VisitTypedefNameDecl(D);
1042
1043 D->Variance = Record.readInt();
1044 D->Index = Record.readInt();
1045 D->VarianceLoc = ReadSourceLocation();
1046 D->ColonLoc = ReadSourceLocation();
1047}
1048
1049void ASTDeclReader::VisitObjCContainerDecl(ObjCContainerDecl *CD) {
1050 VisitNamedDecl(CD);
1051 CD->setAtStartLoc(ReadSourceLocation());
1052 CD->setAtEndRange(ReadSourceRange());
1053}
1054
1055ObjCTypeParamList *ASTDeclReader::ReadObjCTypeParamList() {
1056 unsigned numParams = Record.readInt();
1057 if (numParams == 0)
1058 return nullptr;
1059
1060 SmallVector<ObjCTypeParamDecl *, 4> typeParams;
1061 typeParams.reserve(numParams);
1062 for (unsigned i = 0; i != numParams; ++i) {
1063 auto *typeParam = ReadDeclAs<ObjCTypeParamDecl>();
1064 if (!typeParam)
1065 return nullptr;
1066
1067 typeParams.push_back(typeParam);
1068 }
1069
1070 SourceLocation lAngleLoc = ReadSourceLocation();
1071 SourceLocation rAngleLoc = ReadSourceLocation();
1072
1073 return ObjCTypeParamList::create(Reader.getContext(), lAngleLoc,
1074 typeParams, rAngleLoc);
1075}
1076
1077void ASTDeclReader::ReadObjCDefinitionData(
1078 struct ObjCInterfaceDecl::DefinitionData &Data) {
1079 // Read the superclass.
1080 Data.SuperClassTInfo = GetTypeSourceInfo();
1081
1082 Data.EndLoc = ReadSourceLocation();
1083 Data.HasDesignatedInitializers = Record.readInt();
1084
1085 // Read the directly referenced protocols and their SourceLocations.
1086 unsigned NumProtocols = Record.readInt();
1087 SmallVector<ObjCProtocolDecl *, 16> Protocols;
1088 Protocols.reserve(NumProtocols);
1089 for (unsigned I = 0; I != NumProtocols; ++I)
1090 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1091 SmallVector<SourceLocation, 16> ProtoLocs;
1092 ProtoLocs.reserve(NumProtocols);
1093 for (unsigned I = 0; I != NumProtocols; ++I)
1094 ProtoLocs.push_back(ReadSourceLocation());
1095 Data.ReferencedProtocols.set(Protocols.data(), NumProtocols, ProtoLocs.data(),
1096 Reader.getContext());
1097
1098 // Read the transitive closure of protocols referenced by this class.
1099 NumProtocols = Record.readInt();
1100 Protocols.clear();
1101 Protocols.reserve(NumProtocols);
1102 for (unsigned I = 0; I != NumProtocols; ++I)
1103 Protocols.push_back(ReadDeclAs<ObjCProtocolDecl>());
1104 Data.AllReferencedProtocols.set(Protocols.data(), NumProtocols,
1105 Reader.getContext());
1106}
1107
1108void ASTDeclReader::MergeDefinitionData(ObjCInterfaceDecl *D,
1109 struct ObjCInterfaceDecl::DefinitionData &&NewDD) {
1110 // FIXME: odr checking?
1111}
1112
1113void ASTDeclReader::VisitObjCInterfaceDecl(ObjCInterfaceDecl *ID) {
1114 RedeclarableResult Redecl = VisitRedeclarable(ID);
1115 VisitObjCContainerDecl(ID);
1116 DeferredTypeID = Record.getGlobalTypeID(Record.readInt());
1117 mergeRedeclarable(ID, Redecl);
1118
1119 ID->TypeParamList = ReadObjCTypeParamList();
1120 if (Record.readInt()) {
1121 // Read the definition.
1122 ID->allocateDefinitionData();
1123
1124 ReadObjCDefinitionData(ID->data());
1125 ObjCInterfaceDecl *Canon = ID->getCanonicalDecl();
1126 if (Canon->Data.getPointer()) {
1127 // If we already have a definition, keep the definition invariant and
1128 // merge the data.
1129 MergeDefinitionData(Canon, std::move(ID->data()));
1130 ID->Data = Canon->Data;
1131 } else {
1132 // Set the definition data of the canonical declaration, so other
1133 // redeclarations will see it.
1134 ID->getCanonicalDecl()->Data = ID->Data;
1135
1136 // We will rebuild this list lazily.
1137 ID->setIvarList(nullptr);
1138 }
1139
1140 // Note that we have deserialized a definition.
1141 Reader.PendingDefinitions.insert(ID);
1142
1143 // Note that we've loaded this Objective-C class.
1144 Reader.ObjCClassesLoaded.push_back(ID);
1145 } else {
1146 ID->Data = ID->getCanonicalDecl()->Data;
1147 }
1148}
1149
1150void ASTDeclReader::VisitObjCIvarDecl(ObjCIvarDecl *IVD) {
1151 VisitFieldDecl(IVD);
1152 IVD->setAccessControl((ObjCIvarDecl::AccessControl)Record.readInt());
1153 // This field will be built lazily.
1154 IVD->setNextIvar(nullptr);
1155 bool synth = Record.readInt();
1156 IVD->setSynthesize(synth);
1157}
1158
1159void ASTDeclReader::ReadObjCDefinitionData(
1160 struct ObjCProtocolDecl::DefinitionData &Data) {
1161 unsigned NumProtoRefs = Record.readInt();
1162 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1163 ProtoRefs.reserve(NumProtoRefs);
1164 for (unsigned I = 0; I != NumProtoRefs; ++I)
1165 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1166 SmallVector<SourceLocation, 16> ProtoLocs;
1167 ProtoLocs.reserve(NumProtoRefs);
1168 for (unsigned I = 0; I != NumProtoRefs; ++I)
1169 ProtoLocs.push_back(ReadSourceLocation());
1170 Data.ReferencedProtocols.set(ProtoRefs.data(), NumProtoRefs,
1171 ProtoLocs.data(), Reader.getContext());
1172}
1173
1174void ASTDeclReader::MergeDefinitionData(ObjCProtocolDecl *D,
1175 struct ObjCProtocolDecl::DefinitionData &&NewDD) {
1176 // FIXME: odr checking?
1177}
1178
1179void ASTDeclReader::VisitObjCProtocolDecl(ObjCProtocolDecl *PD) {
1180 RedeclarableResult Redecl = VisitRedeclarable(PD);
1181 VisitObjCContainerDecl(PD);
1182 mergeRedeclarable(PD, Redecl);
1183
1184 if (Record.readInt()) {
1185 // Read the definition.
1186 PD->allocateDefinitionData();
1187
1188 ReadObjCDefinitionData(PD->data());
1189
1190 ObjCProtocolDecl *Canon = PD->getCanonicalDecl();
1191 if (Canon->Data.getPointer()) {
1192 // If we already have a definition, keep the definition invariant and
1193 // merge the data.
1194 MergeDefinitionData(Canon, std::move(PD->data()));
1195 PD->Data = Canon->Data;
1196 } else {
1197 // Set the definition data of the canonical declaration, so other
1198 // redeclarations will see it.
1199 PD->getCanonicalDecl()->Data = PD->Data;
1200 }
1201 // Note that we have deserialized a definition.
1202 Reader.PendingDefinitions.insert(PD);
1203 } else {
1204 PD->Data = PD->getCanonicalDecl()->Data;
1205 }
1206}
1207
1208void ASTDeclReader::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *FD) {
1209 VisitFieldDecl(FD);
1210}
1211
1212void ASTDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
1213 VisitObjCContainerDecl(CD);
1214 CD->setCategoryNameLoc(ReadSourceLocation());
1215 CD->setIvarLBraceLoc(ReadSourceLocation());
1216 CD->setIvarRBraceLoc(ReadSourceLocation());
1217
1218 // Note that this category has been deserialized. We do this before
1219 // deserializing the interface declaration, so that it will consider this
1220 /// category.
1221 Reader.CategoriesDeserialized.insert(CD);
1222
1223 CD->ClassInterface = ReadDeclAs<ObjCInterfaceDecl>();
1224 CD->TypeParamList = ReadObjCTypeParamList();
1225 unsigned NumProtoRefs = Record.readInt();
1226 SmallVector<ObjCProtocolDecl *, 16> ProtoRefs;
1227 ProtoRefs.reserve(NumProtoRefs);
1228 for (unsigned I = 0; I != NumProtoRefs; ++I)
1229 ProtoRefs.push_back(ReadDeclAs<ObjCProtocolDecl>());
1230 SmallVector<SourceLocation, 16> ProtoLocs;
1231 ProtoLocs.reserve(NumProtoRefs);
1232 for (unsigned I = 0; I != NumProtoRefs; ++I)
1233 ProtoLocs.push_back(ReadSourceLocation());
1234 CD->setProtocolList(ProtoRefs.data(), NumProtoRefs, ProtoLocs.data(),
1235 Reader.getContext());
1236
1237 // Protocols in the class extension belong to the class.
1238 if (NumProtoRefs > 0 && CD->ClassInterface && CD->IsClassExtension())
1239 CD->ClassInterface->mergeClassExtensionProtocolList(
1240 (ObjCProtocolDecl *const *)ProtoRefs.data(), NumProtoRefs,
1241 Reader.getContext());
1242}
1243
1244void ASTDeclReader::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *CAD) {
1245 VisitNamedDecl(CAD);
1246 CAD->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1247}
1248
1249void ASTDeclReader::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1250 VisitNamedDecl(D);
1251 D->setAtLoc(ReadSourceLocation());
1252 D->setLParenLoc(ReadSourceLocation());
1253 QualType T = Record.readType();
1254 TypeSourceInfo *TSI = GetTypeSourceInfo();
1255 D->setType(T, TSI);
1256 D->setPropertyAttributes(
1257 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1258 D->setPropertyAttributesAsWritten(
1259 (ObjCPropertyDecl::PropertyAttributeKind)Record.readInt());
1260 D->setPropertyImplementation(
1261 (ObjCPropertyDecl::PropertyControl)Record.readInt());
1262 DeclarationName GetterName = Record.readDeclarationName();
1263 SourceLocation GetterLoc = ReadSourceLocation();
1264 D->setGetterName(GetterName.getObjCSelector(), GetterLoc);
1265 DeclarationName SetterName = Record.readDeclarationName();
1266 SourceLocation SetterLoc = ReadSourceLocation();
1267 D->setSetterName(SetterName.getObjCSelector(), SetterLoc);
1268 D->setGetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1269 D->setSetterMethodDecl(ReadDeclAs<ObjCMethodDecl>());
1270 D->setPropertyIvarDecl(ReadDeclAs<ObjCIvarDecl>());
1271}
1272
1273void ASTDeclReader::VisitObjCImplDecl(ObjCImplDecl *D) {
1274 VisitObjCContainerDecl(D);
1275 D->setClassInterface(ReadDeclAs<ObjCInterfaceDecl>());
1276}
1277
1278void ASTDeclReader::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1279 VisitObjCImplDecl(D);
1280 D->CategoryNameLoc = ReadSourceLocation();
1281}
1282
1283void ASTDeclReader::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1284 VisitObjCImplDecl(D);
1285 D->setSuperClass(ReadDeclAs<ObjCInterfaceDecl>());
1286 D->SuperLoc = ReadSourceLocation();
1287 D->setIvarLBraceLoc(ReadSourceLocation());
1288 D->setIvarRBraceLoc(ReadSourceLocation());
1289 D->setHasNonZeroConstructors(Record.readInt());
1290 D->setHasDestructors(Record.readInt());
1291 D->NumIvarInitializers = Record.readInt();
1292 if (D->NumIvarInitializers)
1293 D->IvarInitializers = ReadGlobalOffset();
1294}
1295
1296void ASTDeclReader::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1297 VisitDecl(D);
1298 D->setAtLoc(ReadSourceLocation());
1299 D->setPropertyDecl(ReadDeclAs<ObjCPropertyDecl>());
1300 D->PropertyIvarDecl = ReadDeclAs<ObjCIvarDecl>();
1301 D->IvarLoc = ReadSourceLocation();
1302 D->setGetterCXXConstructor(Record.readExpr());
1303 D->setSetterCXXAssignment(Record.readExpr());
1304}
1305
1306void ASTDeclReader::VisitFieldDecl(FieldDecl *FD) {
1307 VisitDeclaratorDecl(FD);
1308 FD->Mutable = Record.readInt();
1309
1310 if (auto ISK = static_cast<FieldDecl::InitStorageKind>(Record.readInt())) {
1311 FD->InitStorage.setInt(ISK);
1312 FD->InitStorage.setPointer(ISK == FieldDecl::ISK_CapturedVLAType
1313 ? Record.readType().getAsOpaquePtr()
1314 : Record.readExpr());
1315 }
1316
1317 if (auto *BW = Record.readExpr())
1318 FD->setBitWidth(BW);
1319
1320 if (!FD->getDeclName()) {
1321 if (auto *Tmpl = ReadDeclAs<FieldDecl>())
1322 Reader.getContext().setInstantiatedFromUnnamedFieldDecl(FD, Tmpl);
1323 }
1324 mergeMergeable(FD);
1325}
1326
1327void ASTDeclReader::VisitMSPropertyDecl(MSPropertyDecl *PD) {
1328 VisitDeclaratorDecl(PD);
1329 PD->GetterId = Record.getIdentifierInfo();
1330 PD->SetterId = Record.getIdentifierInfo();
1331}
1332
1333void ASTDeclReader::VisitIndirectFieldDecl(IndirectFieldDecl *FD) {
1334 VisitValueDecl(FD);
1335
1336 FD->ChainingSize = Record.readInt();
1337 assert(FD->ChainingSize >= 2 && "Anonymous chaining must be >= 2")(static_cast <bool> (FD->ChainingSize >= 2 &&
"Anonymous chaining must be >= 2") ? void (0) : __assert_fail
("FD->ChainingSize >= 2 && \"Anonymous chaining must be >= 2\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1337, __extension__ __PRETTY_FUNCTION__))
;
1338 FD->Chaining = new (Reader.getContext())NamedDecl*[FD->ChainingSize];
1339
1340 for (unsigned I = 0; I != FD->ChainingSize; ++I)
1341 FD->Chaining[I] = ReadDeclAs<NamedDecl>();
1342
1343 mergeMergeable(FD);
1344}
1345
1346ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
1347 RedeclarableResult Redecl = VisitRedeclarable(VD);
1348 VisitDeclaratorDecl(VD);
1349
1350 VD->VarDeclBits.SClass = (StorageClass)Record.readInt();
1351 VD->VarDeclBits.TSCSpec = Record.readInt();
1352 VD->VarDeclBits.InitStyle = Record.readInt();
1353 if (!isa<ParmVarDecl>(VD)) {
1354 VD->NonParmVarDeclBits.IsThisDeclarationADemotedDefinition =
1355 Record.readInt();
1356 VD->NonParmVarDeclBits.ExceptionVar = Record.readInt();
1357 VD->NonParmVarDeclBits.NRVOVariable = Record.readInt();
1358 VD->NonParmVarDeclBits.CXXForRangeDecl = Record.readInt();
1359 VD->NonParmVarDeclBits.ObjCForDecl = Record.readInt();
1360 VD->NonParmVarDeclBits.ARCPseudoStrong = Record.readInt();
1361 VD->NonParmVarDeclBits.IsInline = Record.readInt();
1362 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
1363 VD->NonParmVarDeclBits.IsConstexpr = Record.readInt();
1364 VD->NonParmVarDeclBits.IsInitCapture = Record.readInt();
1365 VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record.readInt();
1366 VD->NonParmVarDeclBits.ImplicitParamKind = Record.readInt();
1367 }
1368 auto VarLinkage = Linkage(Record.readInt());
1369 VD->setCachedLinkage(VarLinkage);
1370
1371 // Reconstruct the one piece of the IdentifierNamespace that we need.
1372 if (VD->getStorageClass() == SC_Extern && VarLinkage != NoLinkage &&
1373 VD->getLexicalDeclContext()->isFunctionOrMethod())
1374 VD->setLocalExternDecl();
1375
1376 if (uint64_t Val = Record.readInt()) {
1377 VD->setInit(Record.readExpr());
1378 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
1379 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
1380 Eval->CheckedICE = true;
1381 Eval->IsICE = Val == 3;
1382 }
1383 }
1384
1385 if (VD->getStorageDuration() == SD_Static && Record.readInt())
1386 Reader.DefinitionSource[VD] = Loc.F->Kind == ModuleKind::MK_MainFile;
1387
1388 enum VarKind {
1389 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1390 };
1391 switch ((VarKind)Record.readInt()) {
1392 case VarNotTemplate:
1393 // Only true variables (not parameters or implicit parameters) can be
1394 // merged; the other kinds are not really redeclarable at all.
1395 if (!isa<ParmVarDecl>(VD) && !isa<ImplicitParamDecl>(VD) &&
1396 !isa<VarTemplateSpecializationDecl>(VD))
1397 mergeRedeclarable(VD, Redecl);
1398 break;
1399 case VarTemplate:
1400 // Merged when we merge the template.
1401 VD->setDescribedVarTemplate(ReadDeclAs<VarTemplateDecl>());
1402 break;
1403 case StaticDataMemberSpecialization: { // HasMemberSpecializationInfo.
1404 auto *Tmpl = ReadDeclAs<VarDecl>();
1405 auto TSK = (TemplateSpecializationKind)Record.readInt();
1406 SourceLocation POI = ReadSourceLocation();
1407 Reader.getContext().setInstantiatedFromStaticDataMember(VD, Tmpl, TSK,POI);
1408 mergeRedeclarable(VD, Redecl);
1409 break;
1410 }
1411 }
1412
1413 return Redecl;
1414}
1415
1416void ASTDeclReader::VisitImplicitParamDecl(ImplicitParamDecl *PD) {
1417 VisitVarDecl(PD);
1418}
1419
1420void ASTDeclReader::VisitParmVarDecl(ParmVarDecl *PD) {
1421 VisitVarDecl(PD);
1422 unsigned isObjCMethodParam = Record.readInt();
1423 unsigned scopeDepth = Record.readInt();
1424 unsigned scopeIndex = Record.readInt();
1425 unsigned declQualifier = Record.readInt();
1426 if (isObjCMethodParam) {
1427 assert(scopeDepth == 0)(static_cast <bool> (scopeDepth == 0) ? void (0) : __assert_fail
("scopeDepth == 0", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1427, __extension__ __PRETTY_FUNCTION__))
;
1428 PD->setObjCMethodScopeInfo(scopeIndex);
1429 PD->ParmVarDeclBits.ScopeDepthOrObjCQuals = declQualifier;
1430 } else {
1431 PD->setScopeInfo(scopeDepth, scopeIndex);
1432 }
1433 PD->ParmVarDeclBits.IsKNRPromoted = Record.readInt();
1434 PD->ParmVarDeclBits.HasInheritedDefaultArg = Record.readInt();
1435 if (Record.readInt()) // hasUninstantiatedDefaultArg.
1436 PD->setUninstantiatedDefaultArg(Record.readExpr());
1437
1438 // FIXME: If this is a redeclaration of a function from another module, handle
1439 // inheritance of default arguments.
1440}
1441
1442void ASTDeclReader::VisitDecompositionDecl(DecompositionDecl *DD) {
1443 VisitVarDecl(DD);
1444 auto **BDs = DD->getTrailingObjects<BindingDecl *>();
1445 for (unsigned I = 0; I != DD->NumBindings; ++I)
1446 BDs[I] = ReadDeclAs<BindingDecl>();
1447}
1448
1449void ASTDeclReader::VisitBindingDecl(BindingDecl *BD) {
1450 VisitValueDecl(BD);
1451 BD->Binding = Record.readExpr();
1452}
1453
1454void ASTDeclReader::VisitFileScopeAsmDecl(FileScopeAsmDecl *AD) {
1455 VisitDecl(AD);
1456 AD->setAsmString(cast<StringLiteral>(Record.readExpr()));
1457 AD->setRParenLoc(ReadSourceLocation());
1458}
1459
1460void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
1461 VisitDecl(BD);
1462 BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
1463 BD->setSignatureAsWritten(GetTypeSourceInfo());
1464 unsigned NumParams = Record.readInt();
1465 SmallVector<ParmVarDecl *, 16> Params;
1466 Params.reserve(NumParams);
1467 for (unsigned I = 0; I != NumParams; ++I)
1468 Params.push_back(ReadDeclAs<ParmVarDecl>());
1469 BD->setParams(Params);
1470
1471 BD->setIsVariadic(Record.readInt());
1472 BD->setBlockMissingReturnType(Record.readInt());
1473 BD->setIsConversionFromLambda(Record.readInt());
1474
1475 bool capturesCXXThis = Record.readInt();
1476 unsigned numCaptures = Record.readInt();
1477 SmallVector<BlockDecl::Capture, 16> captures;
1478 captures.reserve(numCaptures);
1479 for (unsigned i = 0; i != numCaptures; ++i) {
1480 auto *decl = ReadDeclAs<VarDecl>();
1481 unsigned flags = Record.readInt();
1482 bool byRef = (flags & 1);
1483 bool nested = (flags & 2);
1484 Expr *copyExpr = ((flags & 4) ? Record.readExpr() : nullptr);
1485
1486 captures.push_back(BlockDecl::Capture(decl, byRef, nested, copyExpr));
1487 }
1488 BD->setCaptures(Reader.getContext(), captures, capturesCXXThis);
1489}
1490
1491void ASTDeclReader::VisitCapturedDecl(CapturedDecl *CD) {
1492 VisitDecl(CD);
1493 unsigned ContextParamPos = Record.readInt();
1494 CD->setNothrow(Record.readInt() != 0);
1495 // Body is set by VisitCapturedStmt.
1496 for (unsigned I = 0; I < CD->NumParams; ++I) {
1497 if (I != ContextParamPos)
1498 CD->setParam(I, ReadDeclAs<ImplicitParamDecl>());
1499 else
1500 CD->setContextParam(I, ReadDeclAs<ImplicitParamDecl>());
1501 }
1502}
1503
1504void ASTDeclReader::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1505 VisitDecl(D);
1506 D->setLanguage((LinkageSpecDecl::LanguageIDs)Record.readInt());
1507 D->setExternLoc(ReadSourceLocation());
1508 D->setRBraceLoc(ReadSourceLocation());
1509}
1510
1511void ASTDeclReader::VisitExportDecl(ExportDecl *D) {
1512 VisitDecl(D);
1513 D->RBraceLoc = ReadSourceLocation();
1514}
1515
1516void ASTDeclReader::VisitLabelDecl(LabelDecl *D) {
1517 VisitNamedDecl(D);
1518 D->setLocStart(ReadSourceLocation());
1519}
1520
1521void ASTDeclReader::VisitNamespaceDecl(NamespaceDecl *D) {
1522 RedeclarableResult Redecl = VisitRedeclarable(D);
1523 VisitNamedDecl(D);
1524 D->setInline(Record.readInt());
1525 D->LocStart = ReadSourceLocation();
1526 D->RBraceLoc = ReadSourceLocation();
1527
1528 // Defer loading the anonymous namespace until we've finished merging
1529 // this namespace; loading it might load a later declaration of the
1530 // same namespace, and we have an invariant that older declarations
1531 // get merged before newer ones try to merge.
1532 GlobalDeclID AnonNamespace = 0;
1533 if (Redecl.getFirstID() == ThisDeclID) {
1534 AnonNamespace = ReadDeclID();
1535 } else {
1536 // Link this namespace back to the first declaration, which has already
1537 // been deserialized.
1538 D->AnonOrFirstNamespaceAndInline.setPointer(D->getFirstDecl());
1539 }
1540
1541 mergeRedeclarable(D, Redecl);
1542
1543 if (AnonNamespace) {
1544 // Each module has its own anonymous namespace, which is disjoint from
1545 // any other module's anonymous namespaces, so don't attach the anonymous
1546 // namespace at all.
1547 auto *Anon = cast<NamespaceDecl>(Reader.GetDecl(AnonNamespace));
1548 if (!Record.isModule())
1549 D->setAnonymousNamespace(Anon);
1550 }
1551}
1552
1553void ASTDeclReader::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1554 RedeclarableResult Redecl = VisitRedeclarable(D);
1555 VisitNamedDecl(D);
1556 D->NamespaceLoc = ReadSourceLocation();
1557 D->IdentLoc = ReadSourceLocation();
1558 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1559 D->Namespace = ReadDeclAs<NamedDecl>();
1560 mergeRedeclarable(D, Redecl);
1561}
1562
1563void ASTDeclReader::VisitUsingDecl(UsingDecl *D) {
1564 VisitNamedDecl(D);
1565 D->setUsingLoc(ReadSourceLocation());
1566 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1567 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1568 D->FirstUsingShadow.setPointer(ReadDeclAs<UsingShadowDecl>());
1569 D->setTypename(Record.readInt());
1570 if (auto *Pattern = ReadDeclAs<NamedDecl>())
1571 Reader.getContext().setInstantiatedFromUsingDecl(D, Pattern);
1572 mergeMergeable(D);
1573}
1574
1575void ASTDeclReader::VisitUsingPackDecl(UsingPackDecl *D) {
1576 VisitNamedDecl(D);
1577 D->InstantiatedFrom = ReadDeclAs<NamedDecl>();
1578 auto **Expansions = D->getTrailingObjects<NamedDecl *>();
1579 for (unsigned I = 0; I != D->NumExpansions; ++I)
1580 Expansions[I] = ReadDeclAs<NamedDecl>();
1581 mergeMergeable(D);
1582}
1583
1584void ASTDeclReader::VisitUsingShadowDecl(UsingShadowDecl *D) {
1585 RedeclarableResult Redecl = VisitRedeclarable(D);
1586 VisitNamedDecl(D);
1587 D->Underlying = ReadDeclAs<NamedDecl>();
1588 D->IdentifierNamespace = Record.readInt();
1589 D->UsingOrNextShadow = ReadDeclAs<NamedDecl>();
1590 auto *Pattern = ReadDeclAs<UsingShadowDecl>();
1591 if (Pattern)
1592 Reader.getContext().setInstantiatedFromUsingShadowDecl(D, Pattern);
1593 mergeRedeclarable(D, Redecl);
1594}
1595
1596void ASTDeclReader::VisitConstructorUsingShadowDecl(
1597 ConstructorUsingShadowDecl *D) {
1598 VisitUsingShadowDecl(D);
1599 D->NominatedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1600 D->ConstructedBaseClassShadowDecl = ReadDeclAs<ConstructorUsingShadowDecl>();
1601 D->IsVirtual = Record.readInt();
1602}
1603
1604void ASTDeclReader::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1605 VisitNamedDecl(D);
1606 D->UsingLoc = ReadSourceLocation();
1607 D->NamespaceLoc = ReadSourceLocation();
1608 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1609 D->NominatedNamespace = ReadDeclAs<NamedDecl>();
1610 D->CommonAncestor = ReadDeclAs<DeclContext>();
1611}
1612
1613void ASTDeclReader::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1614 VisitValueDecl(D);
1615 D->setUsingLoc(ReadSourceLocation());
1616 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1617 ReadDeclarationNameLoc(D->DNLoc, D->getDeclName());
1618 D->EllipsisLoc = ReadSourceLocation();
1619 mergeMergeable(D);
1620}
1621
1622void ASTDeclReader::VisitUnresolvedUsingTypenameDecl(
1623 UnresolvedUsingTypenameDecl *D) {
1624 VisitTypeDecl(D);
1625 D->TypenameLocation = ReadSourceLocation();
1626 D->QualifierLoc = Record.readNestedNameSpecifierLoc();
1627 D->EllipsisLoc = ReadSourceLocation();
1628 mergeMergeable(D);
1629}
1630
1631void ASTDeclReader::ReadCXXDefinitionData(
1632 struct CXXRecordDecl::DefinitionData &Data, const CXXRecordDecl *D) {
1633 // Note: the caller has deserialized the IsLambda bit already.
1634 Data.UserDeclaredConstructor = Record.readInt();
1635 Data.UserDeclaredSpecialMembers = Record.readInt();
1636 Data.Aggregate = Record.readInt();
1637 Data.PlainOldData = Record.readInt();
1638 Data.Empty = Record.readInt();
1639 Data.Polymorphic = Record.readInt();
1640 Data.Abstract = Record.readInt();
1641 Data.IsStandardLayout = Record.readInt();
1642 Data.IsCXX11StandardLayout = Record.readInt();
1643 Data.HasBasesWithFields = Record.readInt();
1644 Data.HasBasesWithNonStaticDataMembers = Record.readInt();
1645 Data.HasPrivateFields = Record.readInt();
1646 Data.HasProtectedFields = Record.readInt();
1647 Data.HasPublicFields = Record.readInt();
1648 Data.HasMutableFields = Record.readInt();
1649 Data.HasVariantMembers = Record.readInt();
1650 Data.HasOnlyCMembers = Record.readInt();
1651 Data.HasInClassInitializer = Record.readInt();
1652 Data.HasUninitializedReferenceMember = Record.readInt();
1653 Data.HasUninitializedFields = Record.readInt();
1654 Data.HasInheritedConstructor = Record.readInt();
1655 Data.HasInheritedAssignment = Record.readInt();
1656 Data.NeedOverloadResolutionForCopyConstructor = Record.readInt();
1657 Data.NeedOverloadResolutionForMoveConstructor = Record.readInt();
1658 Data.NeedOverloadResolutionForMoveAssignment = Record.readInt();
1659 Data.NeedOverloadResolutionForDestructor = Record.readInt();
1660 Data.DefaultedCopyConstructorIsDeleted = Record.readInt();
1661 Data.DefaultedMoveConstructorIsDeleted = Record.readInt();
1662 Data.DefaultedMoveAssignmentIsDeleted = Record.readInt();
1663 Data.DefaultedDestructorIsDeleted = Record.readInt();
1664 Data.HasTrivialSpecialMembers = Record.readInt();
1665 Data.HasTrivialSpecialMembersForCall = Record.readInt();
1666 Data.DeclaredNonTrivialSpecialMembers = Record.readInt();
1667 Data.DeclaredNonTrivialSpecialMembersForCall = Record.readInt();
1668 Data.HasIrrelevantDestructor = Record.readInt();
1669 Data.HasConstexprNonCopyMoveConstructor = Record.readInt();
1670 Data.HasDefaultedDefaultConstructor = Record.readInt();
1671 Data.DefaultedDefaultConstructorIsConstexpr = Record.readInt();
1672 Data.HasConstexprDefaultConstructor = Record.readInt();
1673 Data.HasNonLiteralTypeFieldsOrBases = Record.readInt();
1674 Data.ComputedVisibleConversions = Record.readInt();
1675 Data.UserProvidedDefaultConstructor = Record.readInt();
1676 Data.DeclaredSpecialMembers = Record.readInt();
1677 Data.ImplicitCopyConstructorCanHaveConstParamForVBase = Record.readInt();
1678 Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase = Record.readInt();
1679 Data.ImplicitCopyAssignmentHasConstParam = Record.readInt();
1680 Data.HasDeclaredCopyConstructorWithConstParam = Record.readInt();
1681 Data.HasDeclaredCopyAssignmentWithConstParam = Record.readInt();
1682 Data.ODRHash = Record.readInt();
1683 Data.HasODRHash = true;
1684
1685 if (Record.readInt())
1686 Reader.DefinitionSource[D] = Loc.F->Kind == ModuleKind::MK_MainFile;
1687
1688 Data.NumBases = Record.readInt();
1689 if (Data.NumBases)
1690 Data.Bases = ReadGlobalOffset();
1691 Data.NumVBases = Record.readInt();
1692 if (Data.NumVBases)
1693 Data.VBases = ReadGlobalOffset();
1694
1695 Record.readUnresolvedSet(Data.Conversions);
1696 Record.readUnresolvedSet(Data.VisibleConversions);
1697 assert(Data.Definition && "Data.Definition should be already set!")(static_cast <bool> (Data.Definition && "Data.Definition should be already set!"
) ? void (0) : __assert_fail ("Data.Definition && \"Data.Definition should be already set!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1697, __extension__ __PRETTY_FUNCTION__))
;
1698 Data.FirstFriend = ReadDeclID();
1699
1700 if (Data.IsLambda) {
1701 using Capture = LambdaCapture;
1702
1703 auto &Lambda = static_cast<CXXRecordDecl::LambdaDefinitionData &>(Data);
1704 Lambda.Dependent = Record.readInt();
1705 Lambda.IsGenericLambda = Record.readInt();
1706 Lambda.CaptureDefault = Record.readInt();
1707 Lambda.NumCaptures = Record.readInt();
1708 Lambda.NumExplicitCaptures = Record.readInt();
1709 Lambda.ManglingNumber = Record.readInt();
1710 Lambda.ContextDecl = ReadDeclID();
1711 Lambda.Captures = (Capture *)Reader.getContext().Allocate(
1712 sizeof(Capture) * Lambda.NumCaptures);
1713 Capture *ToCapture = Lambda.Captures;
1714 Lambda.MethodTyInfo = GetTypeSourceInfo();
1715 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
1716 SourceLocation Loc = ReadSourceLocation();
1717 bool IsImplicit = Record.readInt();
1718 auto Kind = static_cast<LambdaCaptureKind>(Record.readInt());
1719 switch (Kind) {
1720 case LCK_StarThis:
1721 case LCK_This:
1722 case LCK_VLAType:
1723 *ToCapture++ = Capture(Loc, IsImplicit, Kind, nullptr,SourceLocation());
1724 break;
1725 case LCK_ByCopy:
1726 case LCK_ByRef:
1727 auto *Var = ReadDeclAs<VarDecl>();
1728 SourceLocation EllipsisLoc = ReadSourceLocation();
1729 *ToCapture++ = Capture(Loc, IsImplicit, Kind, Var, EllipsisLoc);
1730 break;
1731 }
1732 }
1733 }
1734}
1735
1736void ASTDeclReader::MergeDefinitionData(
1737 CXXRecordDecl *D, struct CXXRecordDecl::DefinitionData &&MergeDD) {
1738 assert(D->DefinitionData &&(static_cast <bool> (D->DefinitionData && "merging class definition into non-definition"
) ? void (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1739, __extension__ __PRETTY_FUNCTION__))
1739 "merging class definition into non-definition")(static_cast <bool> (D->DefinitionData && "merging class definition into non-definition"
) ? void (0) : __assert_fail ("D->DefinitionData && \"merging class definition into non-definition\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1739, __extension__ __PRETTY_FUNCTION__))
;
1740 auto &DD = *D->DefinitionData;
1741
1742 if (DD.Definition != MergeDD.Definition) {
1743 // Track that we merged the definitions.
1744 Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
1745 DD.Definition));
1746 Reader.PendingDefinitions.erase(MergeDD.Definition);
1747 MergeDD.Definition->IsCompleteDefinition = false;
1748 Reader.mergeDefinitionVisibility(DD.Definition, MergeDD.Definition);
1749 assert(Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() &&(static_cast <bool> (Reader.Lookups.find(MergeDD.Definition
) == Reader.Lookups.end() && "already loaded pending lookups for merged definition"
) ? void (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1750, __extension__ __PRETTY_FUNCTION__))
1750 "already loaded pending lookups for merged definition")(static_cast <bool> (Reader.Lookups.find(MergeDD.Definition
) == Reader.Lookups.end() && "already loaded pending lookups for merged definition"
) ? void (0) : __assert_fail ("Reader.Lookups.find(MergeDD.Definition) == Reader.Lookups.end() && \"already loaded pending lookups for merged definition\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1750, __extension__ __PRETTY_FUNCTION__))
;
1751 }
1752
1753 auto PFDI = Reader.PendingFakeDefinitionData.find(&DD);
1754 if (PFDI != Reader.PendingFakeDefinitionData.end() &&
1755 PFDI->second == ASTReader::PendingFakeDefinitionKind::Fake) {
1756 // We faked up this definition data because we found a class for which we'd
1757 // not yet loaded the definition. Replace it with the real thing now.
1758 assert(!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?")(static_cast <bool> (!DD.IsLambda && !MergeDD.IsLambda
&& "faked up lambda definition?") ? void (0) : __assert_fail
("!DD.IsLambda && !MergeDD.IsLambda && \"faked up lambda definition?\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 1758, __extension__ __PRETTY_FUNCTION__))
;
1759 PFDI->second = ASTReader::PendingFakeDefinitionKind::FakeLoaded;
1760
1761 // Don't change which declaration is the definition; that is required
1762 // to be invariant once we select it.
1763 auto *Def = DD.Definition;
1764 DD = std::move(MergeDD);
1765 DD.Definition = Def;
1766 return;
1767 }
1768
1769 // FIXME: Move this out into a .def file?
1770 bool DetectedOdrViolation = false;
1771#define OR_FIELD(Field) DD.Field |= MergeDD.Field;
1772#define MATCH_FIELD(Field) \
1773 DetectedOdrViolation |= DD.Field != MergeDD.Field; \
1774 OR_FIELD(Field)
1775 MATCH_FIELD(UserDeclaredConstructor)
1776 MATCH_FIELD(UserDeclaredSpecialMembers)
1777 MATCH_FIELD(Aggregate)
1778 MATCH_FIELD(PlainOldData)
1779 MATCH_FIELD(Empty)
1780 MATCH_FIELD(Polymorphic)
1781 MATCH_FIELD(Abstract)
1782 MATCH_FIELD(IsStandardLayout)
1783 MATCH_FIELD(IsCXX11StandardLayout)
1784 MATCH_FIELD(HasBasesWithFields)
1785 MATCH_FIELD(HasBasesWithNonStaticDataMembers)
1786 MATCH_FIELD(HasPrivateFields)
1787 MATCH_FIELD(HasProtectedFields)
1788 MATCH_FIELD(HasPublicFields)
1789 MATCH_FIELD(HasMutableFields)
1790 MATCH_FIELD(HasVariantMembers)
1791 MATCH_FIELD(HasOnlyCMembers)
1792 MATCH_FIELD(HasInClassInitializer)
1793 MATCH_FIELD(HasUninitializedReferenceMember)
1794 MATCH_FIELD(HasUninitializedFields)
1795 MATCH_FIELD(HasInheritedConstructor)
1796 MATCH_FIELD(HasInheritedAssignment)
1797 MATCH_FIELD(NeedOverloadResolutionForCopyConstructor)
1798 MATCH_FIELD(NeedOverloadResolutionForMoveConstructor)
1799 MATCH_FIELD(NeedOverloadResolutionForMoveAssignment)
1800 MATCH_FIELD(NeedOverloadResolutionForDestructor)
1801 MATCH_FIELD(DefaultedCopyConstructorIsDeleted)
1802 MATCH_FIELD(DefaultedMoveConstructorIsDeleted)
1803 MATCH_FIELD(DefaultedMoveAssignmentIsDeleted)
1804 MATCH_FIELD(DefaultedDestructorIsDeleted)
1805 OR_FIELD(HasTrivialSpecialMembers)
1806 OR_FIELD(HasTrivialSpecialMembersForCall)
1807 OR_FIELD(DeclaredNonTrivialSpecialMembers)
1808 OR_FIELD(DeclaredNonTrivialSpecialMembersForCall)
1809 MATCH_FIELD(HasIrrelevantDestructor)
1810 OR_FIELD(HasConstexprNonCopyMoveConstructor)
1811 OR_FIELD(HasDefaultedDefaultConstructor)
1812 MATCH_FIELD(DefaultedDefaultConstructorIsConstexpr)
1813 OR_FIELD(HasConstexprDefaultConstructor)
1814 MATCH_FIELD(HasNonLiteralTypeFieldsOrBases)
1815 // ComputedVisibleConversions is handled below.
1816 MATCH_FIELD(UserProvidedDefaultConstructor)
1817 OR_FIELD(DeclaredSpecialMembers)
1818 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForVBase)
1819 MATCH_FIELD(ImplicitCopyConstructorCanHaveConstParamForNonVBase)
1820 MATCH_FIELD(ImplicitCopyAssignmentHasConstParam)
1821 OR_FIELD(HasDeclaredCopyConstructorWithConstParam)
1822 OR_FIELD(HasDeclaredCopyAssignmentWithConstParam)
1823 MATCH_FIELD(IsLambda)
1824#undef OR_FIELD
1825#undef MATCH_FIELD
1826
1827 if (DD.NumBases != MergeDD.NumBases || DD.NumVBases != MergeDD.NumVBases)
1828 DetectedOdrViolation = true;
1829 // FIXME: Issue a diagnostic if the base classes don't match when we come
1830 // to lazily load them.
1831
1832 // FIXME: Issue a diagnostic if the list of conversion functions doesn't
1833 // match when we come to lazily load them.
1834 if (MergeDD.ComputedVisibleConversions && !DD.ComputedVisibleConversions) {
1835 DD.VisibleConversions = std::move(MergeDD.VisibleConversions);
1836 DD.ComputedVisibleConversions = true;
1837 }
1838
1839 // FIXME: Issue a diagnostic if FirstFriend doesn't match when we come to
1840 // lazily load it.
1841
1842 if (DD.IsLambda) {
1843 // FIXME: ODR-checking for merging lambdas (this happens, for instance,
1844 // when they occur within the body of a function template specialization).
1845 }
1846
1847 if (D->getODRHash() != MergeDD.ODRHash) {
1848 DetectedOdrViolation = true;
1849 }
1850
1851 if (DetectedOdrViolation)
1852 Reader.PendingOdrMergeFailures[DD.Definition].push_back(
1853 {MergeDD.Definition, &MergeDD});
1854}
1855
1856void ASTDeclReader::ReadCXXRecordDefinition(CXXRecordDecl *D, bool Update) {
1857 struct CXXRecordDecl::DefinitionData *DD;
1858 ASTContext &C = Reader.getContext();
1859
1860 // Determine whether this is a lambda closure type, so that we can
1861 // allocate the appropriate DefinitionData structure.
1862 bool IsLambda = Record.readInt();
1863 if (IsLambda)
1864 DD = new (C) CXXRecordDecl::LambdaDefinitionData(D, nullptr, false, false,
1865 LCD_None);
1866 else
1867 DD = new (C) struct CXXRecordDecl::DefinitionData(D);
1868
1869 CXXRecordDecl *Canon = D->getCanonicalDecl();
1870 // Set decl definition data before reading it, so that during deserialization
1871 // when we read CXXRecordDecl, it already has definition data and we don't
1872 // set fake one.
1873 if (!Canon->DefinitionData)
1874 Canon->DefinitionData = DD;
1875 D->DefinitionData = Canon->DefinitionData;
1876 ReadCXXDefinitionData(*DD, D);
1877
1878 // We might already have a different definition for this record. This can
1879 // happen either because we're reading an update record, or because we've
1880 // already done some merging. Either way, just merge into it.
1881 if (Canon->DefinitionData != DD) {
1882 MergeDefinitionData(Canon, std::move(*DD));
1883 return;
1884 }
1885
1886 // Mark this declaration as being a definition.
1887 D->IsCompleteDefinition = true;
1888
1889 // If this is not the first declaration or is an update record, we can have
1890 // other redeclarations already. Make a note that we need to propagate the
1891 // DefinitionData pointer onto them.
1892 if (Update || Canon != D)
1893 Reader.PendingDefinitions.insert(D);
1894}
1895
1896ASTDeclReader::RedeclarableResult
1897ASTDeclReader::VisitCXXRecordDeclImpl(CXXRecordDecl *D) {
1898 RedeclarableResult Redecl = VisitRecordDeclImpl(D);
1899
1900 ASTContext &C = Reader.getContext();
1901
1902 enum CXXRecKind {
1903 CXXRecNotTemplate = 0, CXXRecTemplate, CXXRecMemberSpecialization
1904 };
1905 switch ((CXXRecKind)Record.readInt()) {
1906 case CXXRecNotTemplate:
1907 // Merged when we merge the folding set entry in the primary template.
1908 if (!isa<ClassTemplateSpecializationDecl>(D))
1909 mergeRedeclarable(D, Redecl);
1910 break;
1911 case CXXRecTemplate: {
1912 // Merged when we merge the template.
1913 auto *Template = ReadDeclAs<ClassTemplateDecl>();
1914 D->TemplateOrInstantiation = Template;
1915 if (!Template->getTemplatedDecl()) {
1916 // We've not actually loaded the ClassTemplateDecl yet, because we're
1917 // currently being loaded as its pattern. Rely on it to set up our
1918 // TypeForDecl (see VisitClassTemplateDecl).
1919 //
1920 // Beware: we do not yet know our canonical declaration, and may still
1921 // get merged once the surrounding class template has got off the ground.
1922 DeferredTypeID = 0;
1923 }
1924 break;
1925 }
1926 case CXXRecMemberSpecialization: {
1927 auto *RD = ReadDeclAs<CXXRecordDecl>();
1928 auto TSK = (TemplateSpecializationKind)Record.readInt();
1929 SourceLocation POI = ReadSourceLocation();
1930 MemberSpecializationInfo *MSI = new (C) MemberSpecializationInfo(RD, TSK);
1931 MSI->setPointOfInstantiation(POI);
1932 D->TemplateOrInstantiation = MSI;
1933 mergeRedeclarable(D, Redecl);
1934 break;
1935 }
1936 }
1937
1938 bool WasDefinition = Record.readInt();
1939 if (WasDefinition)
1940 ReadCXXRecordDefinition(D, /*Update*/false);
1941 else
1942 // Propagate DefinitionData pointer from the canonical declaration.
1943 D->DefinitionData = D->getCanonicalDecl()->DefinitionData;
1944
1945 // Lazily load the key function to avoid deserializing every method so we can
1946 // compute it.
1947 if (WasDefinition) {
1948 DeclID KeyFn = ReadDeclID();
1949 if (KeyFn && D->IsCompleteDefinition)
1950 // FIXME: This is wrong for the ARM ABI, where some other module may have
1951 // made this function no longer be a key function. We need an update
1952 // record or similar for that case.
1953 C.KeyFunctions[D] = KeyFn;
1954 }
1955
1956 return Redecl;
1957}
1958
1959void ASTDeclReader::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
1960 VisitFunctionDecl(D);
1961 D->IsCopyDeductionCandidate = Record.readInt();
1962}
1963
1964void ASTDeclReader::VisitCXXMethodDecl(CXXMethodDecl *D) {
1965 VisitFunctionDecl(D);
1966
1967 unsigned NumOverridenMethods = Record.readInt();
1968 if (D->isCanonicalDecl()) {
1969 while (NumOverridenMethods--) {
1970 // Avoid invariant checking of CXXMethodDecl::addOverriddenMethod,
1971 // MD may be initializing.
1972 if (auto *MD = ReadDeclAs<CXXMethodDecl>())
1973 Reader.getContext().addOverriddenMethod(D, MD->getCanonicalDecl());
1974 }
1975 } else {
1976 // We don't care about which declarations this used to override; we get
1977 // the relevant information from the canonical declaration.
1978 Record.skipInts(NumOverridenMethods);
1979 }
1980}
1981
1982void ASTDeclReader::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1983 // We need the inherited constructor information to merge the declaration,
1984 // so we have to read it before we call VisitCXXMethodDecl.
1985 if (D->isInheritingConstructor()) {
1986 auto *Shadow = ReadDeclAs<ConstructorUsingShadowDecl>();
1987 auto *Ctor = ReadDeclAs<CXXConstructorDecl>();
1988 *D->getTrailingObjects<InheritedConstructor>() =
1989 InheritedConstructor(Shadow, Ctor);
1990 }
1991
1992 VisitCXXMethodDecl(D);
1993}
1994
1995void ASTDeclReader::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1996 VisitCXXMethodDecl(D);
1997
1998 if (auto *OperatorDelete = ReadDeclAs<FunctionDecl>()) {
1999 CXXDestructorDecl *Canon = D->getCanonicalDecl();
2000 auto *ThisArg = Record.readExpr();
2001 // FIXME: Check consistency if we have an old and new operator delete.
2002 if (!Canon->OperatorDelete) {
2003 Canon->OperatorDelete = OperatorDelete;
2004 Canon->OperatorDeleteThisArg = ThisArg;
2005 }
2006 }
2007}
2008
2009void ASTDeclReader::VisitCXXConversionDecl(CXXConversionDecl *D) {
2010 VisitCXXMethodDecl(D);
2011}
2012
2013void ASTDeclReader::VisitImportDecl(ImportDecl *D) {
2014 VisitDecl(D);
2015 D->ImportedAndComplete.setPointer(readModule());
2016 D->ImportedAndComplete.setInt(Record.readInt());
2017 auto *StoredLocs = D->getTrailingObjects<SourceLocation>();
2018 for (unsigned I = 0, N = Record.back(); I != N; ++I)
2019 StoredLocs[I] = ReadSourceLocation();
2020 Record.skipInts(1); // The number of stored source locations.
2021}
2022
2023void ASTDeclReader::VisitAccessSpecDecl(AccessSpecDecl *D) {
2024 VisitDecl(D);
2025 D->setColonLoc(ReadSourceLocation());
2026}
2027
2028void ASTDeclReader::VisitFriendDecl(FriendDecl *D) {
2029 VisitDecl(D);
2030 if (Record.readInt()) // hasFriendDecl
2031 D->Friend = ReadDeclAs<NamedDecl>();
2032 else
2033 D->Friend = GetTypeSourceInfo();
2034 for (unsigned i = 0; i != D->NumTPLists; ++i)
2035 D->getTrailingObjects<TemplateParameterList *>()[i] =
2036 Record.readTemplateParameterList();
2037 D->NextFriend = ReadDeclID();
2038 D->UnsupportedFriend = (Record.readInt() != 0);
2039 D->FriendLoc = ReadSourceLocation();
2040}
2041
2042void ASTDeclReader::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
2043 VisitDecl(D);
2044 unsigned NumParams = Record.readInt();
2045 D->NumParams = NumParams;
2046 D->Params = new TemplateParameterList*[NumParams];
2047 for (unsigned i = 0; i != NumParams; ++i)
2048 D->Params[i] = Record.readTemplateParameterList();
2049 if (Record.readInt()) // HasFriendDecl
2050 D->Friend = ReadDeclAs<NamedDecl>();
2051 else
2052 D->Friend = GetTypeSourceInfo();
2053 D->FriendLoc = ReadSourceLocation();
2054}
2055
2056DeclID ASTDeclReader::VisitTemplateDecl(TemplateDecl *D) {
2057 VisitNamedDecl(D);
2058
2059 DeclID PatternID = ReadDeclID();
2060 auto *TemplatedDecl = cast_or_null<NamedDecl>(Reader.GetDecl(PatternID));
2061 TemplateParameterList *TemplateParams = Record.readTemplateParameterList();
2062 // FIXME handle associated constraints
2063 D->init(TemplatedDecl, TemplateParams);
2064
2065 return PatternID;
2066}
2067
2068ASTDeclReader::RedeclarableResult
2069ASTDeclReader::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
2070 RedeclarableResult Redecl = VisitRedeclarable(D);
2071
2072 // Make sure we've allocated the Common pointer first. We do this before
2073 // VisitTemplateDecl so that getCommonPtr() can be used during initialization.
2074 RedeclarableTemplateDecl *CanonD = D->getCanonicalDecl();
2075 if (!CanonD->Common) {
2076 CanonD->Common = CanonD->newCommon(Reader.getContext());
2077 Reader.PendingDefinitions.insert(CanonD);
2078 }
2079 D->Common = CanonD->Common;
2080
2081 // If this is the first declaration of the template, fill in the information
2082 // for the 'common' pointer.
2083 if (ThisDeclID == Redecl.getFirstID()) {
2084 if (auto *RTD = ReadDeclAs<RedeclarableTemplateDecl>()) {
2085 assert(RTD->getKind() == D->getKind() &&(static_cast <bool> (RTD->getKind() == D->getKind
() && "InstantiatedFromMemberTemplate kind mismatch")
? void (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2086, __extension__ __PRETTY_FUNCTION__))
2086 "InstantiatedFromMemberTemplate kind mismatch")(static_cast <bool> (RTD->getKind() == D->getKind
() && "InstantiatedFromMemberTemplate kind mismatch")
? void (0) : __assert_fail ("RTD->getKind() == D->getKind() && \"InstantiatedFromMemberTemplate kind mismatch\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2086, __extension__ __PRETTY_FUNCTION__))
;
2087 D->setInstantiatedFromMemberTemplate(RTD);
2088 if (Record.readInt())
2089 D->setMemberSpecialization();
2090 }
2091 }
2092
2093 DeclID PatternID = VisitTemplateDecl(D);
2094 D->IdentifierNamespace = Record.readInt();
2095
2096 mergeRedeclarable(D, Redecl, PatternID);
2097
2098 // If we merged the template with a prior declaration chain, merge the common
2099 // pointer.
2100 // FIXME: Actually merge here, don't just overwrite.
2101 D->Common = D->getCanonicalDecl()->Common;
2102
2103 return Redecl;
2104}
2105
2106void ASTDeclReader::VisitClassTemplateDecl(ClassTemplateDecl *D) {
2107 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2108
2109 if (ThisDeclID == Redecl.getFirstID()) {
2110 // This ClassTemplateDecl owns a CommonPtr; read it to keep track of all of
2111 // the specializations.
2112 SmallVector<serialization::DeclID, 32> SpecIDs;
2113 ReadDeclIDList(SpecIDs);
2114 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2115 }
2116
2117 if (D->getTemplatedDecl()->TemplateOrInstantiation) {
2118 // We were loaded before our templated declaration was. We've not set up
2119 // its corresponding type yet (see VisitCXXRecordDeclImpl), so reconstruct
2120 // it now.
2121 Reader.getContext().getInjectedClassNameType(
2122 D->getTemplatedDecl(), D->getInjectedClassNameSpecialization());
2123 }
2124}
2125
2126void ASTDeclReader::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) {
2127 llvm_unreachable("BuiltinTemplates are not serialized")::llvm::llvm_unreachable_internal("BuiltinTemplates are not serialized"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2127)
;
2128}
2129
2130/// TODO: Unify with ClassTemplateDecl version?
2131/// May require unifying ClassTemplateDecl and
2132/// VarTemplateDecl beyond TemplateDecl...
2133void ASTDeclReader::VisitVarTemplateDecl(VarTemplateDecl *D) {
2134 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2135
2136 if (ThisDeclID == Redecl.getFirstID()) {
2137 // This VarTemplateDecl owns a CommonPtr; read it to keep track of all of
2138 // the specializations.
2139 SmallVector<serialization::DeclID, 32> SpecIDs;
2140 ReadDeclIDList(SpecIDs);
2141 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2142 }
2143}
2144
2145ASTDeclReader::RedeclarableResult
2146ASTDeclReader::VisitClassTemplateSpecializationDeclImpl(
2147 ClassTemplateSpecializationDecl *D) {
2148 RedeclarableResult Redecl = VisitCXXRecordDeclImpl(D);
2149
2150 ASTContext &C = Reader.getContext();
2151 if (Decl *InstD = ReadDecl()) {
2152 if (auto *CTD = dyn_cast<ClassTemplateDecl>(InstD)) {
2153 D->SpecializedTemplate = CTD;
2154 } else {
2155 SmallVector<TemplateArgument, 8> TemplArgs;
2156 Record.readTemplateArgumentList(TemplArgs);
2157 TemplateArgumentList *ArgList
2158 = TemplateArgumentList::CreateCopy(C, TemplArgs);
2159 auto *PS =
2160 new (C) ClassTemplateSpecializationDecl::
2161 SpecializedPartialSpecialization();
2162 PS->PartialSpecialization
2163 = cast<ClassTemplatePartialSpecializationDecl>(InstD);
2164 PS->TemplateArgs = ArgList;
2165 D->SpecializedTemplate = PS;
2166 }
2167 }
2168
2169 SmallVector<TemplateArgument, 8> TemplArgs;
2170 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2171 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2172 D->PointOfInstantiation = ReadSourceLocation();
2173 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2174
2175 bool writtenAsCanonicalDecl = Record.readInt();
2176 if (writtenAsCanonicalDecl) {
2177 auto *CanonPattern = ReadDeclAs<ClassTemplateDecl>();
2178 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2179 // Set this as, or find, the canonical declaration for this specialization
2180 ClassTemplateSpecializationDecl *CanonSpec;
2181 if (auto *Partial = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) {
2182 CanonSpec = CanonPattern->getCommonPtr()->PartialSpecializations
2183 .GetOrInsertNode(Partial);
2184 } else {
2185 CanonSpec =
2186 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2187 }
2188 // If there was already a canonical specialization, merge into it.
2189 if (CanonSpec != D) {
2190 mergeRedeclarable<TagDecl>(D, CanonSpec, Redecl);
2191
2192 // This declaration might be a definition. Merge with any existing
2193 // definition.
2194 if (auto *DDD = D->DefinitionData) {
2195 if (CanonSpec->DefinitionData)
2196 MergeDefinitionData(CanonSpec, std::move(*DDD));
2197 else
2198 CanonSpec->DefinitionData = D->DefinitionData;
2199 }
2200 D->DefinitionData = CanonSpec->DefinitionData;
2201 }
2202 }
2203 }
2204
2205 // Explicit info.
2206 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2207 auto *ExplicitInfo =
2208 new (C) ClassTemplateSpecializationDecl::ExplicitSpecializationInfo;
2209 ExplicitInfo->TypeAsWritten = TyInfo;
2210 ExplicitInfo->ExternLoc = ReadSourceLocation();
2211 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2212 D->ExplicitInfo = ExplicitInfo;
2213 }
2214
2215 return Redecl;
2216}
2217
2218void ASTDeclReader::VisitClassTemplatePartialSpecializationDecl(
2219 ClassTemplatePartialSpecializationDecl *D) {
2220 RedeclarableResult Redecl = VisitClassTemplateSpecializationDeclImpl(D);
2221
2222 D->TemplateParams = Record.readTemplateParameterList();
2223 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2224
2225 // These are read/set from/to the first declaration.
2226 if (ThisDeclID == Redecl.getFirstID()) {
2227 D->InstantiatedFromMember.setPointer(
2228 ReadDeclAs<ClassTemplatePartialSpecializationDecl>());
2229 D->InstantiatedFromMember.setInt(Record.readInt());
2230 }
2231}
2232
2233void ASTDeclReader::VisitClassScopeFunctionSpecializationDecl(
2234 ClassScopeFunctionSpecializationDecl *D) {
2235 VisitDecl(D);
2236 D->Specialization = ReadDeclAs<CXXMethodDecl>();
2237}
2238
2239void ASTDeclReader::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2240 RedeclarableResult Redecl = VisitRedeclarableTemplateDecl(D);
2241
2242 if (ThisDeclID == Redecl.getFirstID()) {
2243 // This FunctionTemplateDecl owns a CommonPtr; read it.
2244 SmallVector<serialization::DeclID, 32> SpecIDs;
2245 ReadDeclIDList(SpecIDs);
2246 ASTDeclReader::AddLazySpecializations(D, SpecIDs);
2247 }
2248}
2249
2250/// TODO: Unify with ClassTemplateSpecializationDecl version?
2251/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2252/// VarTemplate(Partial)SpecializationDecl with a new data
2253/// structure Template(Partial)SpecializationDecl, and
2254/// using Template(Partial)SpecializationDecl as input type.
2255ASTDeclReader::RedeclarableResult
2256ASTDeclReader::VisitVarTemplateSpecializationDeclImpl(
2257 VarTemplateSpecializationDecl *D) {
2258 RedeclarableResult Redecl = VisitVarDeclImpl(D);
2259
2260 ASTContext &C = Reader.getContext();
2261 if (Decl *InstD = ReadDecl()) {
2262 if (auto *VTD = dyn_cast<VarTemplateDecl>(InstD)) {
2263 D->SpecializedTemplate = VTD;
2264 } else {
2265 SmallVector<TemplateArgument, 8> TemplArgs;
2266 Record.readTemplateArgumentList(TemplArgs);
2267 TemplateArgumentList *ArgList = TemplateArgumentList::CreateCopy(
2268 C, TemplArgs);
2269 auto *PS =
2270 new (C)
2271 VarTemplateSpecializationDecl::SpecializedPartialSpecialization();
2272 PS->PartialSpecialization =
2273 cast<VarTemplatePartialSpecializationDecl>(InstD);
2274 PS->TemplateArgs = ArgList;
2275 D->SpecializedTemplate = PS;
2276 }
2277 }
2278
2279 // Explicit info.
2280 if (TypeSourceInfo *TyInfo = GetTypeSourceInfo()) {
2281 auto *ExplicitInfo =
2282 new (C) VarTemplateSpecializationDecl::ExplicitSpecializationInfo;
2283 ExplicitInfo->TypeAsWritten = TyInfo;
2284 ExplicitInfo->ExternLoc = ReadSourceLocation();
2285 ExplicitInfo->TemplateKeywordLoc = ReadSourceLocation();
2286 D->ExplicitInfo = ExplicitInfo;
2287 }
2288
2289 SmallVector<TemplateArgument, 8> TemplArgs;
2290 Record.readTemplateArgumentList(TemplArgs, /*Canonicalize*/ true);
2291 D->TemplateArgs = TemplateArgumentList::CreateCopy(C, TemplArgs);
2292 D->PointOfInstantiation = ReadSourceLocation();
2293 D->SpecializationKind = (TemplateSpecializationKind)Record.readInt();
2294 D->IsCompleteDefinition = Record.readInt();
2295
2296 bool writtenAsCanonicalDecl = Record.readInt();
2297 if (writtenAsCanonicalDecl) {
2298 auto *CanonPattern = ReadDeclAs<VarTemplateDecl>();
2299 if (D->isCanonicalDecl()) { // It's kept in the folding set.
2300 // FIXME: If it's already present, merge it.
2301 if (auto *Partial = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
2302 CanonPattern->getCommonPtr()->PartialSpecializations
2303 .GetOrInsertNode(Partial);
2304 } else {
2305 CanonPattern->getCommonPtr()->Specializations.GetOrInsertNode(D);
2306 }
2307 }
2308 }
2309
2310 return Redecl;
2311}
2312
2313/// TODO: Unify with ClassTemplatePartialSpecializationDecl version?
2314/// May require unifying ClassTemplate(Partial)SpecializationDecl and
2315/// VarTemplate(Partial)SpecializationDecl with a new data
2316/// structure Template(Partial)SpecializationDecl, and
2317/// using Template(Partial)SpecializationDecl as input type.
2318void ASTDeclReader::VisitVarTemplatePartialSpecializationDecl(
2319 VarTemplatePartialSpecializationDecl *D) {
2320 RedeclarableResult Redecl = VisitVarTemplateSpecializationDeclImpl(D);
2321
2322 D->TemplateParams = Record.readTemplateParameterList();
2323 D->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
2324
2325 // These are read/set from/to the first declaration.
2326 if (ThisDeclID == Redecl.getFirstID()) {
2327 D->InstantiatedFromMember.setPointer(
2328 ReadDeclAs<VarTemplatePartialSpecializationDecl>());
2329 D->InstantiatedFromMember.setInt(Record.readInt());
2330 }
2331}
2332
2333void ASTDeclReader::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2334 VisitTypeDecl(D);
2335
2336 D->setDeclaredWithTypename(Record.readInt());
2337
2338 if (Record.readInt())
2339 D->setDefaultArgument(GetTypeSourceInfo());
2340}
2341
2342void ASTDeclReader::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2343 VisitDeclaratorDecl(D);
2344 // TemplateParmPosition.
2345 D->setDepth(Record.readInt());
2346 D->setPosition(Record.readInt());
2347 if (D->isExpandedParameterPack()) {
2348 auto TypesAndInfos =
2349 D->getTrailingObjects<std::pair<QualType, TypeSourceInfo *>>();
2350 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2351 new (&TypesAndInfos[I].first) QualType(Record.readType());
2352 TypesAndInfos[I].second = GetTypeSourceInfo();
2353 }
2354 } else {
2355 // Rest of NonTypeTemplateParmDecl.
2356 D->ParameterPack = Record.readInt();
2357 if (Record.readInt())
2358 D->setDefaultArgument(Record.readExpr());
2359 }
2360}
2361
2362void ASTDeclReader::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2363 VisitTemplateDecl(D);
2364 // TemplateParmPosition.
2365 D->setDepth(Record.readInt());
2366 D->setPosition(Record.readInt());
2367 if (D->isExpandedParameterPack()) {
2368 auto **Data = D->getTrailingObjects<TemplateParameterList *>();
2369 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2370 I != N; ++I)
2371 Data[I] = Record.readTemplateParameterList();
2372 } else {
2373 // Rest of TemplateTemplateParmDecl.
2374 D->ParameterPack = Record.readInt();
2375 if (Record.readInt())
2376 D->setDefaultArgument(Reader.getContext(),
2377 Record.readTemplateArgumentLoc());
2378 }
2379}
2380
2381void ASTDeclReader::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2382 VisitRedeclarableTemplateDecl(D);
2383}
2384
2385void ASTDeclReader::VisitStaticAssertDecl(StaticAssertDecl *D) {
2386 VisitDecl(D);
2387 D->AssertExprAndFailed.setPointer(Record.readExpr());
2388 D->AssertExprAndFailed.setInt(Record.readInt());
2389 D->Message = cast_or_null<StringLiteral>(Record.readExpr());
2390 D->RParenLoc = ReadSourceLocation();
2391}
2392
2393void ASTDeclReader::VisitEmptyDecl(EmptyDecl *D) {
2394 VisitDecl(D);
2395}
2396
2397std::pair<uint64_t, uint64_t>
2398ASTDeclReader::VisitDeclContext(DeclContext *DC) {
2399 uint64_t LexicalOffset = ReadLocalOffset();
2400 uint64_t VisibleOffset = ReadLocalOffset();
2401 return std::make_pair(LexicalOffset, VisibleOffset);
2402}
2403
2404template <typename T>
2405ASTDeclReader::RedeclarableResult
2406ASTDeclReader::VisitRedeclarable(Redeclarable<T> *D) {
2407 DeclID FirstDeclID = ReadDeclID();
2408 Decl *MergeWith = nullptr;
2409
2410 bool IsKeyDecl = ThisDeclID == FirstDeclID;
2411 bool IsFirstLocalDecl = false;
2412
2413 uint64_t RedeclOffset = 0;
2414
2415 // 0 indicates that this declaration was the only declaration of its entity,
2416 // and is used for space optimization.
2417 if (FirstDeclID == 0) {
2418 FirstDeclID = ThisDeclID;
2419 IsKeyDecl = true;
2420 IsFirstLocalDecl = true;
2421 } else if (unsigned N = Record.readInt()) {
2422 // This declaration was the first local declaration, but may have imported
2423 // other declarations.
2424 IsKeyDecl = N == 1;
2425 IsFirstLocalDecl = true;
2426
2427 // We have some declarations that must be before us in our redeclaration
2428 // chain. Read them now, and remember that we ought to merge with one of
2429 // them.
2430 // FIXME: Provide a known merge target to the second and subsequent such
2431 // declaration.
2432 for (unsigned I = 0; I != N - 1; ++I)
2433 MergeWith = ReadDecl();
2434
2435 RedeclOffset = ReadLocalOffset();
2436 } else {
2437 // This declaration was not the first local declaration. Read the first
2438 // local declaration now, to trigger the import of other redeclarations.
2439 (void)ReadDecl();
2440 }
2441
2442 auto *FirstDecl = cast_or_null<T>(Reader.GetDecl(FirstDeclID));
2443 if (FirstDecl != D) {
2444 // We delay loading of the redeclaration chain to avoid deeply nested calls.
2445 // We temporarily set the first (canonical) declaration as the previous one
2446 // which is the one that matters and mark the real previous DeclID to be
2447 // loaded & attached later on.
2448 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(FirstDecl);
2449 D->First = FirstDecl->getCanonicalDecl();
2450 }
2451
2452 auto *DAsT = static_cast<T *>(D);
2453
2454 // Note that we need to load local redeclarations of this decl and build a
2455 // decl chain for them. This must happen *after* we perform the preloading
2456 // above; this ensures that the redeclaration chain is built in the correct
2457 // order.
2458 if (IsFirstLocalDecl)
2459 Reader.PendingDeclChains.push_back(std::make_pair(DAsT, RedeclOffset));
2460
2461 return RedeclarableResult(MergeWith, FirstDeclID, IsKeyDecl);
2462}
2463
2464/// Attempts to merge the given declaration (D) with another declaration
2465/// of the same entity.
2466template<typename T>
2467void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase,
2468 RedeclarableResult &Redecl,
2469 DeclID TemplatePatternID) {
2470 // If modules are not available, there is no reason to perform this merge.
2471 if (!Reader.getContext().getLangOpts().Modules)
2472 return;
2473
2474 // If we're not the canonical declaration, we don't need to merge.
2475 if (!DBase->isFirstDecl())
2476 return;
2477
2478 auto *D = static_cast<T *>(DBase);
2479
2480 if (auto *Existing = Redecl.getKnownMergeTarget())
2481 // We already know of an existing declaration we should merge with.
2482 mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);
2483 else if (FindExistingResult ExistingRes = findExisting(D))
2484 if (T *Existing = ExistingRes)
2485 mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);
2486}
2487
2488/// "Cast" to type T, asserting if we don't have an implicit conversion.
2489/// We use this to put code in a template that will only be valid for certain
2490/// instantiations.
2491template<typename T> static T assert_cast(T t) { return t; }
2492template<typename T> static T assert_cast(...) {
2493 llvm_unreachable("bad assert_cast")::llvm::llvm_unreachable_internal("bad assert_cast", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2493)
;
2494}
2495
2496/// Merge together the pattern declarations from two template
2497/// declarations.
2498void ASTDeclReader::mergeTemplatePattern(RedeclarableTemplateDecl *D,
2499 RedeclarableTemplateDecl *Existing,
2500 DeclID DsID, bool IsKeyDecl) {
2501 auto *DPattern = D->getTemplatedDecl();
2502 auto *ExistingPattern = Existing->getTemplatedDecl();
2503 RedeclarableResult Result(/*MergeWith*/ ExistingPattern,
2504 DPattern->getCanonicalDecl()->getGlobalID(),
2505 IsKeyDecl);
2506
2507 if (auto *DClass = dyn_cast<CXXRecordDecl>(DPattern)) {
2508 // Merge with any existing definition.
2509 // FIXME: This is duplicated in several places. Refactor.
2510 auto *ExistingClass =
2511 cast<CXXRecordDecl>(ExistingPattern)->getCanonicalDecl();
2512 if (auto *DDD = DClass->DefinitionData) {
2513 if (ExistingClass->DefinitionData) {
2514 MergeDefinitionData(ExistingClass, std::move(*DDD));
2515 } else {
2516 ExistingClass->DefinitionData = DClass->DefinitionData;
2517 // We may have skipped this before because we thought that DClass
2518 // was the canonical declaration.
2519 Reader.PendingDefinitions.insert(DClass);
2520 }
2521 }
2522 DClass->DefinitionData = ExistingClass->DefinitionData;
2523
2524 return mergeRedeclarable(DClass, cast<TagDecl>(ExistingPattern),
2525 Result);
2526 }
2527 if (auto *DFunction = dyn_cast<FunctionDecl>(DPattern))
2528 return mergeRedeclarable(DFunction, cast<FunctionDecl>(ExistingPattern),
2529 Result);
2530 if (auto *DVar = dyn_cast<VarDecl>(DPattern))
2531 return mergeRedeclarable(DVar, cast<VarDecl>(ExistingPattern), Result);
2532 if (auto *DAlias = dyn_cast<TypeAliasDecl>(DPattern))
2533 return mergeRedeclarable(DAlias, cast<TypedefNameDecl>(ExistingPattern),
2534 Result);
2535 llvm_unreachable("merged an unknown kind of redeclarable template")::llvm::llvm_unreachable_internal("merged an unknown kind of redeclarable template"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2535)
;
2536}
2537
2538/// Attempts to merge the given declaration (D) with another declaration
2539/// of the same entity.
2540template<typename T>
2541void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,
2542 RedeclarableResult &Redecl,
2543 DeclID TemplatePatternID) {
2544 auto *D = static_cast<T *>(DBase);
2545 T *ExistingCanon = Existing->getCanonicalDecl();
2546 T *DCanon = D->getCanonicalDecl();
2547 if (ExistingCanon != DCanon) {
2548 assert(DCanon->getGlobalID() == Redecl.getFirstID() &&(static_cast <bool> (DCanon->getGlobalID() == Redecl
.getFirstID() && "already merged this declaration") ?
void (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2549, __extension__ __PRETTY_FUNCTION__))
2549 "already merged this declaration")(static_cast <bool> (DCanon->getGlobalID() == Redecl
.getFirstID() && "already merged this declaration") ?
void (0) : __assert_fail ("DCanon->getGlobalID() == Redecl.getFirstID() && \"already merged this declaration\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2549, __extension__ __PRETTY_FUNCTION__))
;
2550
2551 // Have our redeclaration link point back at the canonical declaration
2552 // of the existing declaration, so that this declaration has the
2553 // appropriate canonical declaration.
2554 D->RedeclLink = Redeclarable<T>::PreviousDeclLink(ExistingCanon);
2555 D->First = ExistingCanon;
2556 ExistingCanon->Used |= D->Used;
2557 D->Used = false;
2558
2559 // When we merge a namespace, update its pointer to the first namespace.
2560 // We cannot have loaded any redeclarations of this declaration yet, so
2561 // there's nothing else that needs to be updated.
2562 if (auto *Namespace = dyn_cast<NamespaceDecl>(D))
2563 Namespace->AnonOrFirstNamespaceAndInline.setPointer(
2564 assert_cast<NamespaceDecl*>(ExistingCanon));
2565
2566 // When we merge a template, merge its pattern.
2567 if (auto *DTemplate = dyn_cast<RedeclarableTemplateDecl>(D))
2568 mergeTemplatePattern(
2569 DTemplate, assert_cast<RedeclarableTemplateDecl*>(ExistingCanon),
2570 TemplatePatternID, Redecl.isKeyDecl());
2571
2572 // If this declaration is a key declaration, make a note of that.
2573 if (Redecl.isKeyDecl())
2574 Reader.KeyDecls[ExistingCanon].push_back(Redecl.getFirstID());
2575 }
2576}
2577
2578/// ODR-like semantics for C/ObjC allow us to merge tag types and a structural
2579/// check in Sema guarantees the types can be merged (see C11 6.2.7/1 or C89
2580/// 6.1.2.6/1). Although most merging is done in Sema, we need to guarantee
2581/// that some types are mergeable during deserialization, otherwise name
2582/// lookup fails. This is the case for EnumConstantDecl.
2583static bool allowODRLikeMergeInC(NamedDecl *ND) {
2584 if (!ND)
2585 return false;
2586 // TODO: implement merge for other necessary decls.
2587 if (isa<EnumConstantDecl>(ND))
2588 return true;
2589 return false;
2590}
2591
2592/// Attempts to merge the given declaration (D) with another declaration
2593/// of the same entity, for the case where the entity is not actually
2594/// redeclarable. This happens, for instance, when merging the fields of
2595/// identical class definitions from two different modules.
2596template<typename T>
2597void ASTDeclReader::mergeMergeable(Mergeable<T> *D) {
2598 // If modules are not available, there is no reason to perform this merge.
2599 if (!Reader.getContext().getLangOpts().Modules)
2600 return;
2601
2602 // ODR-based merging is performed in C++ and in some cases (tag types) in C.
2603 // Note that C identically-named things in different translation units are
2604 // not redeclarations, but may still have compatible types, where ODR-like
2605 // semantics may apply.
2606 if (!Reader.getContext().getLangOpts().CPlusPlus &&
2607 !allowODRLikeMergeInC(dyn_cast<NamedDecl>(static_cast<T*>(D))))
2608 return;
2609
2610 if (FindExistingResult ExistingRes = findExisting(static_cast<T*>(D)))
2611 if (T *Existing = ExistingRes)
2612 Reader.getContext().setPrimaryMergedDecl(static_cast<T *>(D),
2613 Existing->getCanonicalDecl());
2614}
2615
2616void ASTDeclReader::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2617 VisitDecl(D);
2618 unsigned NumVars = D->varlist_size();
2619 SmallVector<Expr *, 16> Vars;
2620 Vars.reserve(NumVars);
2621 for (unsigned i = 0; i != NumVars; ++i) {
2622 Vars.push_back(Record.readExpr());
2623 }
2624 D->setVars(Vars);
2625}
2626
2627void ASTDeclReader::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2628 VisitValueDecl(D);
2629 D->setLocation(ReadSourceLocation());
2630 D->setCombiner(Record.readExpr());
2631 D->setInitializer(
2632 Record.readExpr(),
2633 static_cast<OMPDeclareReductionDecl::InitKind>(Record.readInt()));
2634 D->PrevDeclInScope = ReadDeclID();
2635}
2636
2637void ASTDeclReader::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2638 VisitVarDecl(D);
2639}
2640
2641//===----------------------------------------------------------------------===//
2642// Attribute Reading
2643//===----------------------------------------------------------------------===//
2644
2645/// Reads attributes from the current stream position.
2646void ASTReader::ReadAttributes(ASTRecordReader &Record, AttrVec &Attrs) {
2647 for (unsigned i = 0, e = Record.readInt(); i != e; ++i) {
2648 Attr *New = nullptr;
2649 auto Kind = (attr::Kind)Record.readInt();
2650 SourceRange Range = Record.readSourceRange();
2651 ASTContext &Context = getContext();
2652
2653#include "clang/Serialization/AttrPCHRead.inc"
2654
2655 assert(New && "Unable to decode attribute?")(static_cast <bool> (New && "Unable to decode attribute?"
) ? void (0) : __assert_fail ("New && \"Unable to decode attribute?\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2655, __extension__ __PRETTY_FUNCTION__))
;
2656 Attrs.push_back(New);
2657 }
2658}
2659
2660//===----------------------------------------------------------------------===//
2661// ASTReader Implementation
2662//===----------------------------------------------------------------------===//
2663
2664/// Note that we have loaded the declaration with the given
2665/// Index.
2666///
2667/// This routine notes that this declaration has already been loaded,
2668/// so that future GetDecl calls will return this declaration rather
2669/// than trying to load a new declaration.
2670inline void ASTReader::LoadedDecl(unsigned Index, Decl *D) {
2671 assert(!DeclsLoaded[Index] && "Decl loaded twice?")(static_cast <bool> (!DeclsLoaded[Index] && "Decl loaded twice?"
) ? void (0) : __assert_fail ("!DeclsLoaded[Index] && \"Decl loaded twice?\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2671, __extension__ __PRETTY_FUNCTION__))
;
2672 DeclsLoaded[Index] = D;
2673}
2674
2675/// Determine whether the consumer will be interested in seeing
2676/// this declaration (via HandleTopLevelDecl).
2677///
2678/// This routine should return true for anything that might affect
2679/// code generation, e.g., inline function definitions, Objective-C
2680/// declarations with metadata, etc.
2681static bool isConsumerInterestedIn(ASTContext &Ctx, Decl *D, bool HasBody) {
2682 // An ObjCMethodDecl is never considered as "interesting" because its
2683 // implementation container always is.
2684
2685 // An ImportDecl or VarDecl imported from a module map module will get
2686 // emitted when we import the relevant module.
2687 if (isa<ImportDecl>(D) || isa<VarDecl>(D)) {
2688 auto *M = D->getImportedOwningModule();
2689 if (M && M->Kind == Module::ModuleMapModule &&
2690 Ctx.DeclMustBeEmitted(D))
2691 return false;
2692 }
2693
2694 if (isa<FileScopeAsmDecl>(D) ||
2695 isa<ObjCProtocolDecl>(D) ||
2696 isa<ObjCImplDecl>(D) ||
2697 isa<ImportDecl>(D) ||
2698 isa<PragmaCommentDecl>(D) ||
2699 isa<PragmaDetectMismatchDecl>(D))
2700 return true;
2701 if (isa<OMPThreadPrivateDecl>(D) || isa<OMPDeclareReductionDecl>(D))
2702 return !D->getDeclContext()->isFunctionOrMethod();
2703 if (const auto *Var = dyn_cast<VarDecl>(D))
2704 return Var->isFileVarDecl() &&
2705 Var->isThisDeclarationADefinition() == VarDecl::Definition;
2706 if (const auto *Func = dyn_cast<FunctionDecl>(D))
2707 return Func->doesThisDeclarationHaveABody() || HasBody;
2708
2709 if (auto *ES = D->getASTContext().getExternalSource())
2710 if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never)
2711 return true;
2712
2713 return false;
2714}
2715
2716/// Get the correct cursor and offset for loading a declaration.
2717ASTReader::RecordLocation
2718ASTReader::DeclCursorForID(DeclID ID, SourceLocation &Loc) {
2719 GlobalDeclMapType::iterator I = GlobalDeclMap.find(ID);
2720 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")(static_cast <bool> (I != GlobalDeclMap.end() &&
"Corrupted global declaration map") ? void (0) : __assert_fail
("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2720, __extension__ __PRETTY_FUNCTION__))
;
2721 ModuleFile *M = I->second;
2722 const DeclOffset &DOffs =
2723 M->DeclOffsets[ID - M->BaseDeclID - NUM_PREDEF_DECL_IDS];
2724 Loc = TranslateSourceLocation(*M, DOffs.getLocation());
2725 return RecordLocation(M, DOffs.BitOffset);
2726}
2727
2728ASTReader::RecordLocation ASTReader::getLocalBitOffset(uint64_t GlobalOffset) {
2729 auto I = GlobalBitOffsetsMap.find(GlobalOffset);
2730
2731 assert(I != GlobalBitOffsetsMap.end() && "Corrupted global bit offsets map")(static_cast <bool> (I != GlobalBitOffsetsMap.end() &&
"Corrupted global bit offsets map") ? void (0) : __assert_fail
("I != GlobalBitOffsetsMap.end() && \"Corrupted global bit offsets map\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2731, __extension__ __PRETTY_FUNCTION__))
;
2732 return RecordLocation(I->second, GlobalOffset - I->second->GlobalBitOffset);
2733}
2734
2735uint64_t ASTReader::getGlobalBitOffset(ModuleFile &M, uint32_t LocalOffset) {
2736 return LocalOffset + M.GlobalBitOffset;
2737}
2738
2739static bool isSameTemplateParameterList(const TemplateParameterList *X,
2740 const TemplateParameterList *Y);
2741
2742/// Determine whether two template parameters are similar enough
2743/// that they may be used in declarations of the same template.
2744static bool isSameTemplateParameter(const NamedDecl *X,
2745 const NamedDecl *Y) {
2746 if (X->getKind() != Y->getKind())
2747 return false;
2748
2749 if (const auto *TX = dyn_cast<TemplateTypeParmDecl>(X)) {
2750 const auto *TY = cast<TemplateTypeParmDecl>(Y);
2751 return TX->isParameterPack() == TY->isParameterPack();
2752 }
2753
2754 if (const auto *TX = dyn_cast<NonTypeTemplateParmDecl>(X)) {
2755 const auto *TY = cast<NonTypeTemplateParmDecl>(Y);
2756 return TX->isParameterPack() == TY->isParameterPack() &&
2757 TX->getASTContext().hasSameType(TX->getType(), TY->getType());
2758 }
2759
2760 const auto *TX = cast<TemplateTemplateParmDecl>(X);
2761 const auto *TY = cast<TemplateTemplateParmDecl>(Y);
2762 return TX->isParameterPack() == TY->isParameterPack() &&
2763 isSameTemplateParameterList(TX->getTemplateParameters(),
2764 TY->getTemplateParameters());
2765}
2766
2767static NamespaceDecl *getNamespace(const NestedNameSpecifier *X) {
2768 if (auto *NS = X->getAsNamespace())
2769 return NS;
2770 if (auto *NAS = X->getAsNamespaceAlias())
2771 return NAS->getNamespace();
2772 return nullptr;
2773}
2774
2775static bool isSameQualifier(const NestedNameSpecifier *X,
2776 const NestedNameSpecifier *Y) {
2777 if (auto *NSX = getNamespace(X)) {
2778 auto *NSY = getNamespace(Y);
2779 if (!NSY || NSX->getCanonicalDecl() != NSY->getCanonicalDecl())
2780 return false;
2781 } else if (X->getKind() != Y->getKind())
2782 return false;
2783
2784 // FIXME: For namespaces and types, we're permitted to check that the entity
2785 // is named via the same tokens. We should probably do so.
2786 switch (X->getKind()) {
2787 case NestedNameSpecifier::Identifier:
2788 if (X->getAsIdentifier() != Y->getAsIdentifier())
2789 return false;
2790 break;
2791 case NestedNameSpecifier::Namespace:
2792 case NestedNameSpecifier::NamespaceAlias:
2793 // We've already checked that we named the same namespace.
2794 break;
2795 case NestedNameSpecifier::TypeSpec:
2796 case NestedNameSpecifier::TypeSpecWithTemplate:
2797 if (X->getAsType()->getCanonicalTypeInternal() !=
2798 Y->getAsType()->getCanonicalTypeInternal())
2799 return false;
2800 break;
2801 case NestedNameSpecifier::Global:
2802 case NestedNameSpecifier::Super:
2803 return true;
2804 }
2805
2806 // Recurse into earlier portion of NNS, if any.
2807 auto *PX = X->getPrefix();
2808 auto *PY = Y->getPrefix();
2809 if (PX && PY)
2810 return isSameQualifier(PX, PY);
2811 return !PX && !PY;
2812}
2813
2814/// Determine whether two template parameter lists are similar enough
2815/// that they may be used in declarations of the same template.
2816static bool isSameTemplateParameterList(const TemplateParameterList *X,
2817 const TemplateParameterList *Y) {
2818 if (X->size() != Y->size())
2819 return false;
2820
2821 for (unsigned I = 0, N = X->size(); I != N; ++I)
2822 if (!isSameTemplateParameter(X->getParam(I), Y->getParam(I)))
2823 return false;
2824
2825 return true;
2826}
2827
2828/// Determine whether the attributes we can overload on are identical for A and
2829/// B. Will ignore any overloadable attrs represented in the type of A and B.
2830static bool hasSameOverloadableAttrs(const FunctionDecl *A,
2831 const FunctionDecl *B) {
2832 // Note that pass_object_size attributes are represented in the function's
2833 // ExtParameterInfo, so we don't need to check them here.
2834
2835 SmallVector<const EnableIfAttr *, 4> AEnableIfs;
2836 // Since this is an equality check, we can ignore that enable_if attrs show up
2837 // in reverse order.
2838 for (const auto *EIA : A->specific_attrs<EnableIfAttr>())
2839 AEnableIfs.push_back(EIA);
2840
2841 SmallVector<const EnableIfAttr *, 4> BEnableIfs;
2842 for (const auto *EIA : B->specific_attrs<EnableIfAttr>())
2843 BEnableIfs.push_back(EIA);
2844
2845 // Two very common cases: either we have 0 enable_if attrs, or we have an
2846 // unequal number of enable_if attrs.
2847 if (AEnableIfs.empty() && BEnableIfs.empty())
2848 return true;
2849
2850 if (AEnableIfs.size() != BEnableIfs.size())
2851 return false;
2852
2853 llvm::FoldingSetNodeID Cand1ID, Cand2ID;
2854 for (unsigned I = 0, E = AEnableIfs.size(); I != E; ++I) {
2855 Cand1ID.clear();
2856 Cand2ID.clear();
2857
2858 AEnableIfs[I]->getCond()->Profile(Cand1ID, A->getASTContext(), true);
2859 BEnableIfs[I]->getCond()->Profile(Cand2ID, B->getASTContext(), true);
2860 if (Cand1ID != Cand2ID)
2861 return false;
2862 }
2863
2864 return true;
2865}
2866
2867/// Determine whether the two declarations refer to the same entity.
2868static bool isSameEntity(NamedDecl *X, NamedDecl *Y) {
2869 assert(X->getDeclName() == Y->getDeclName() && "Declaration name mismatch!")(static_cast <bool> (X->getDeclName() == Y->getDeclName
() && "Declaration name mismatch!") ? void (0) : __assert_fail
("X->getDeclName() == Y->getDeclName() && \"Declaration name mismatch!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2869, __extension__ __PRETTY_FUNCTION__))
;
2870
2871 if (X == Y)
2872 return true;
2873
2874 // Must be in the same context.
2875 //
2876 // Note that we can't use DeclContext::Equals here, because the DeclContexts
2877 // could be two different declarations of the same function. (We will fix the
2878 // semantic DC to refer to the primary definition after merging.)
2879 if (!declaresSameEntity(cast<Decl>(X->getDeclContext()->getRedeclContext()),
2880 cast<Decl>(Y->getDeclContext()->getRedeclContext())))
2881 return false;
2882
2883 // Two typedefs refer to the same entity if they have the same underlying
2884 // type.
2885 if (const auto *TypedefX = dyn_cast<TypedefNameDecl>(X))
2886 if (const auto *TypedefY = dyn_cast<TypedefNameDecl>(Y))
2887 return X->getASTContext().hasSameType(TypedefX->getUnderlyingType(),
2888 TypedefY->getUnderlyingType());
2889
2890 // Must have the same kind.
2891 if (X->getKind() != Y->getKind())
2892 return false;
2893
2894 // Objective-C classes and protocols with the same name always match.
2895 if (isa<ObjCInterfaceDecl>(X) || isa<ObjCProtocolDecl>(X))
2896 return true;
2897
2898 if (isa<ClassTemplateSpecializationDecl>(X)) {
2899 // No need to handle these here: we merge them when adding them to the
2900 // template.
2901 return false;
2902 }
2903
2904 // Compatible tags match.
2905 if (const auto *TagX = dyn_cast<TagDecl>(X)) {
2906 const auto *TagY = cast<TagDecl>(Y);
2907 return (TagX->getTagKind() == TagY->getTagKind()) ||
2908 ((TagX->getTagKind() == TTK_Struct || TagX->getTagKind() == TTK_Class ||
2909 TagX->getTagKind() == TTK_Interface) &&
2910 (TagY->getTagKind() == TTK_Struct || TagY->getTagKind() == TTK_Class ||
2911 TagY->getTagKind() == TTK_Interface));
2912 }
2913
2914 // Functions with the same type and linkage match.
2915 // FIXME: This needs to cope with merging of prototyped/non-prototyped
2916 // functions, etc.
2917 if (const auto *FuncX = dyn_cast<FunctionDecl>(X)) {
2918 const auto *FuncY = cast<FunctionDecl>(Y);
2919 if (const auto *CtorX = dyn_cast<CXXConstructorDecl>(X)) {
2920 const auto *CtorY = cast<CXXConstructorDecl>(Y);
2921 if (CtorX->getInheritedConstructor() &&
2922 !isSameEntity(CtorX->getInheritedConstructor().getConstructor(),
2923 CtorY->getInheritedConstructor().getConstructor()))
2924 return false;
2925 }
2926
2927 if (FuncX->isMultiVersion() != FuncY->isMultiVersion())
2928 return false;
2929
2930 // Multiversioned functions with different feature strings are represented
2931 // as separate declarations.
2932 if (FuncX->isMultiVersion()) {
2933 const auto *TAX = FuncX->getAttr<TargetAttr>();
2934 const auto *TAY = FuncY->getAttr<TargetAttr>();
2935 assert(TAX && TAY && "Multiversion Function without target attribute")(static_cast <bool> (TAX && TAY && "Multiversion Function without target attribute"
) ? void (0) : __assert_fail ("TAX && TAY && \"Multiversion Function without target attribute\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 2935, __extension__ __PRETTY_FUNCTION__))
;
2936
2937 if (TAX->getFeaturesStr() != TAY->getFeaturesStr())
2938 return false;
2939 }
2940
2941 ASTContext &C = FuncX->getASTContext();
2942 auto GetTypeAsWritten = [](const FunctionDecl *FD) {
2943 // Map to the first declaration that we've already merged into this one.
2944 // The TSI of redeclarations might not match (due to calling conventions
2945 // being inherited onto the type but not the TSI), but the TSI type of
2946 // the first declaration of the function should match across modules.
2947 FD = FD->getCanonicalDecl();
2948 return FD->getTypeSourceInfo() ? FD->getTypeSourceInfo()->getType()
2949 : FD->getType();
2950 };
2951 QualType XT = GetTypeAsWritten(FuncX), YT = GetTypeAsWritten(FuncY);
2952 if (!C.hasSameType(XT, YT)) {
2953 // We can get functions with different types on the redecl chain in C++17
2954 // if they have differing exception specifications and at least one of
2955 // the excpetion specs is unresolved.
2956 auto *XFPT = XT->getAs<FunctionProtoType>();
2957 auto *YFPT = YT->getAs<FunctionProtoType>();
2958 if (C.getLangOpts().CPlusPlus17 && XFPT && YFPT &&
2959 (isUnresolvedExceptionSpec(XFPT->getExceptionSpecType()) ||
2960 isUnresolvedExceptionSpec(YFPT->getExceptionSpecType())) &&
2961 C.hasSameFunctionTypeIgnoringExceptionSpec(XT, YT))
2962 return true;
2963 return false;
2964 }
2965 return FuncX->getLinkageInternal() == FuncY->getLinkageInternal() &&
2966 hasSameOverloadableAttrs(FuncX, FuncY);
2967 }
2968
2969 // Variables with the same type and linkage match.
2970 if (const auto *VarX = dyn_cast<VarDecl>(X)) {
2971 const auto *VarY = cast<VarDecl>(Y);
2972 if (VarX->getLinkageInternal() == VarY->getLinkageInternal()) {
2973 ASTContext &C = VarX->getASTContext();
2974 if (C.hasSameType(VarX->getType(), VarY->getType()))
2975 return true;
2976
2977 // We can get decls with different types on the redecl chain. Eg.
2978 // template <typename T> struct S { static T Var[]; }; // #1
2979 // template <typename T> T S<T>::Var[sizeof(T)]; // #2
2980 // Only? happens when completing an incomplete array type. In this case
2981 // when comparing #1 and #2 we should go through their element type.
2982 const ArrayType *VarXTy = C.getAsArrayType(VarX->getType());
2983 const ArrayType *VarYTy = C.getAsArrayType(VarY->getType());
2984 if (!VarXTy || !VarYTy)
2985 return false;
2986 if (VarXTy->isIncompleteArrayType() || VarYTy->isIncompleteArrayType())
2987 return C.hasSameType(VarXTy->getElementType(), VarYTy->getElementType());
2988 }
2989 return false;
2990 }
2991
2992 // Namespaces with the same name and inlinedness match.
2993 if (const auto *NamespaceX = dyn_cast<NamespaceDecl>(X)) {
2994 const auto *NamespaceY = cast<NamespaceDecl>(Y);
2995 return NamespaceX->isInline() == NamespaceY->isInline();
2996 }
2997
2998 // Identical template names and kinds match if their template parameter lists
2999 // and patterns match.
3000 if (const auto *TemplateX = dyn_cast<TemplateDecl>(X)) {
3001 const auto *TemplateY = cast<TemplateDecl>(Y);
3002 return isSameEntity(TemplateX->getTemplatedDecl(),
3003 TemplateY->getTemplatedDecl()) &&
3004 isSameTemplateParameterList(TemplateX->getTemplateParameters(),
3005 TemplateY->getTemplateParameters());
3006 }
3007
3008 // Fields with the same name and the same type match.
3009 if (const auto *FDX = dyn_cast<FieldDecl>(X)) {
3010 const auto *FDY = cast<FieldDecl>(Y);
3011 // FIXME: Also check the bitwidth is odr-equivalent, if any.
3012 return X->getASTContext().hasSameType(FDX->getType(), FDY->getType());
3013 }
3014
3015 // Indirect fields with the same target field match.
3016 if (const auto *IFDX = dyn_cast<IndirectFieldDecl>(X)) {
3017 const auto *IFDY = cast<IndirectFieldDecl>(Y);
3018 return IFDX->getAnonField()->getCanonicalDecl() ==
3019 IFDY->getAnonField()->getCanonicalDecl();
3020 }
3021
3022 // Enumerators with the same name match.
3023 if (isa<EnumConstantDecl>(X))
3024 // FIXME: Also check the value is odr-equivalent.
3025 return true;
3026
3027 // Using shadow declarations with the same target match.
3028 if (const auto *USX = dyn_cast<UsingShadowDecl>(X)) {
3029 const auto *USY = cast<UsingShadowDecl>(Y);
3030 return USX->getTargetDecl() == USY->getTargetDecl();
3031 }
3032
3033 // Using declarations with the same qualifier match. (We already know that
3034 // the name matches.)
3035 if (const auto *UX = dyn_cast<UsingDecl>(X)) {
3036 const auto *UY = cast<UsingDecl>(Y);
3037 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3038 UX->hasTypename() == UY->hasTypename() &&
3039 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3040 }
3041 if (const auto *UX = dyn_cast<UnresolvedUsingValueDecl>(X)) {
3042 const auto *UY = cast<UnresolvedUsingValueDecl>(Y);
3043 return isSameQualifier(UX->getQualifier(), UY->getQualifier()) &&
3044 UX->isAccessDeclaration() == UY->isAccessDeclaration();
3045 }
3046 if (const auto *UX = dyn_cast<UnresolvedUsingTypenameDecl>(X))
3047 return isSameQualifier(
3048 UX->getQualifier(),
3049 cast<UnresolvedUsingTypenameDecl>(Y)->getQualifier());
3050
3051 // Namespace alias definitions with the same target match.
3052 if (const auto *NAX = dyn_cast<NamespaceAliasDecl>(X)) {
3053 const auto *NAY = cast<NamespaceAliasDecl>(Y);
3054 return NAX->getNamespace()->Equals(NAY->getNamespace());
3055 }
3056
3057 return false;
3058}
3059
3060/// Find the context in which we should search for previous declarations when
3061/// looking for declarations to merge.
3062DeclContext *ASTDeclReader::getPrimaryContextForMerging(ASTReader &Reader,
3063 DeclContext *DC) {
3064 if (auto *ND = dyn_cast<NamespaceDecl>(DC))
3065 return ND->getOriginalNamespace();
3066
3067 if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) {
3068 // Try to dig out the definition.
3069 auto *DD = RD->DefinitionData;
3070 if (!DD)
3071 DD = RD->getCanonicalDecl()->DefinitionData;
3072
3073 // If there's no definition yet, then DC's definition is added by an update
3074 // record, but we've not yet loaded that update record. In this case, we
3075 // commit to DC being the canonical definition now, and will fix this when
3076 // we load the update record.
3077 if (!DD) {
3078 DD = new (Reader.getContext()) struct CXXRecordDecl::DefinitionData(RD);
3079 RD->IsCompleteDefinition = true;
3080 RD->DefinitionData = DD;
3081 RD->getCanonicalDecl()->DefinitionData = DD;
3082
3083 // Track that we did this horrible thing so that we can fix it later.
3084 Reader.PendingFakeDefinitionData.insert(
3085 std::make_pair(DD, ASTReader::PendingFakeDefinitionKind::Fake));
3086 }
3087
3088 return DD->Definition;
3089 }
3090
3091 if (auto *ED = dyn_cast<EnumDecl>(DC))
3092 return ED->getASTContext().getLangOpts().CPlusPlus? ED->getDefinition()
3093 : nullptr;
3094
3095 // We can see the TU here only if we have no Sema object. In that case,
3096 // there's no TU scope to look in, so using the DC alone is sufficient.
3097 if (auto *TU = dyn_cast<TranslationUnitDecl>(DC))
3098 return TU;
3099
3100 return nullptr;
3101}
3102
3103ASTDeclReader::FindExistingResult::~FindExistingResult() {
3104 // Record that we had a typedef name for linkage whether or not we merge
3105 // with that declaration.
3106 if (TypedefNameForLinkage) {
3107 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3108 Reader.ImportedTypedefNamesForLinkage.insert(
3109 std::make_pair(std::make_pair(DC, TypedefNameForLinkage), New));
3110 return;
3111 }
3112
3113 if (!AddResult || Existing)
3114 return;
3115
3116 DeclarationName Name = New->getDeclName();
3117 DeclContext *DC = New->getDeclContext()->getRedeclContext();
3118 if (needsAnonymousDeclarationNumber(New)) {
3119 setAnonymousDeclForMerging(Reader, New->getLexicalDeclContext(),
3120 AnonymousDeclNumber, New);
3121 } else if (DC->isTranslationUnit() &&
3122 !Reader.getContext().getLangOpts().CPlusPlus) {
3123 if (Reader.getIdResolver().tryAddTopLevelDecl(New, Name))
3124 Reader.PendingFakeLookupResults[Name.getAsIdentifierInfo()]
3125 .push_back(New);
3126 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3127 // Add the declaration to its redeclaration context so later merging
3128 // lookups will find it.
3129 MergeDC->makeDeclVisibleInContextImpl(New, /*Internal*/true);
3130 }
3131}
3132
3133/// Find the declaration that should be merged into, given the declaration found
3134/// by name lookup. If we're merging an anonymous declaration within a typedef,
3135/// we need a matching typedef, and we merge with the type inside it.
3136static NamedDecl *getDeclForMerging(NamedDecl *Found,
3137 bool IsTypedefNameForLinkage) {
3138 if (!IsTypedefNameForLinkage)
3139 return Found;
3140
3141 // If we found a typedef declaration that gives a name to some other
3142 // declaration, then we want that inner declaration. Declarations from
3143 // AST files are handled via ImportedTypedefNamesForLinkage.
3144 if (Found->isFromASTFile())
3145 return nullptr;
3146
3147 if (auto *TND = dyn_cast<TypedefNameDecl>(Found))
3148 return TND->getAnonDeclWithTypedefName(/*AnyRedecl*/true);
3149
3150 return nullptr;
3151}
3152
3153/// Find the declaration to use to populate the anonymous declaration table
3154/// for the given lexical DeclContext. We only care about finding local
3155/// definitions of the context; we'll merge imported ones as we go.
3156DeclContext *
3157ASTDeclReader::getPrimaryDCForAnonymousDecl(DeclContext *LexicalDC) {
3158 // For classes, we track the definition as we merge.
3159 if (auto *RD = dyn_cast<CXXRecordDecl>(LexicalDC)) {
3160 auto *DD = RD->getCanonicalDecl()->DefinitionData;
3161 return DD ? DD->Definition : nullptr;
3162 }
3163
3164 // For anything else, walk its merged redeclarations looking for a definition.
3165 // Note that we can't just call getDefinition here because the redeclaration
3166 // chain isn't wired up.
3167 for (auto *D : merged_redecls(cast<Decl>(LexicalDC))) {
3168 if (auto *FD = dyn_cast<FunctionDecl>(D))
3169 if (FD->isThisDeclarationADefinition())
3170 return FD;
3171 if (auto *MD = dyn_cast<ObjCMethodDecl>(D))
3172 if (MD->isThisDeclarationADefinition())
3173 return MD;
3174 }
3175
3176 // No merged definition yet.
3177 return nullptr;
3178}
3179
3180NamedDecl *ASTDeclReader::getAnonymousDeclForMerging(ASTReader &Reader,
3181 DeclContext *DC,
3182 unsigned Index) {
3183 // If the lexical context has been merged, look into the now-canonical
3184 // definition.
3185 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3186
3187 // If we've seen this before, return the canonical declaration.
3188 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3189 if (Index < Previous.size() && Previous[Index])
3190 return Previous[Index];
3191
3192 // If this is the first time, but we have parsed a declaration of the context,
3193 // build the anonymous declaration list from the parsed declaration.
3194 auto *PrimaryDC = getPrimaryDCForAnonymousDecl(DC);
3195 if (PrimaryDC && !cast<Decl>(PrimaryDC)->isFromASTFile()) {
3196 numberAnonymousDeclsWithin(PrimaryDC, [&](NamedDecl *ND, unsigned Number) {
3197 if (Previous.size() == Number)
3198 Previous.push_back(cast<NamedDecl>(ND->getCanonicalDecl()));
3199 else
3200 Previous[Number] = cast<NamedDecl>(ND->getCanonicalDecl());
3201 });
3202 }
3203
3204 return Index < Previous.size() ? Previous[Index] : nullptr;
3205}
3206
3207void ASTDeclReader::setAnonymousDeclForMerging(ASTReader &Reader,
3208 DeclContext *DC, unsigned Index,
3209 NamedDecl *D) {
3210 auto *CanonDC = cast<Decl>(DC)->getCanonicalDecl();
3211
3212 auto &Previous = Reader.AnonymousDeclarationsForMerging[CanonDC];
3213 if (Index >= Previous.size())
3214 Previous.resize(Index + 1);
3215 if (!Previous[Index])
3216 Previous[Index] = D;
3217}
3218
3219ASTDeclReader::FindExistingResult ASTDeclReader::findExisting(NamedDecl *D) {
3220 DeclarationName Name = TypedefNameForLinkage ? TypedefNameForLinkage
3221 : D->getDeclName();
3222
3223 if (!Name && !needsAnonymousDeclarationNumber(D)) {
3224 // Don't bother trying to find unnamed declarations that are in
3225 // unmergeable contexts.
3226 FindExistingResult Result(Reader, D, /*Existing=*/nullptr,
3227 AnonymousDeclNumber, TypedefNameForLinkage);
3228 Result.suppress();
3229 return Result;
3230 }
3231
3232 DeclContext *DC = D->getDeclContext()->getRedeclContext();
3233 if (TypedefNameForLinkage) {
3234 auto It = Reader.ImportedTypedefNamesForLinkage.find(
3235 std::make_pair(DC, TypedefNameForLinkage));
3236 if (It != Reader.ImportedTypedefNamesForLinkage.end())
3237 if (isSameEntity(It->second, D))
3238 return FindExistingResult(Reader, D, It->second, AnonymousDeclNumber,
3239 TypedefNameForLinkage);
3240 // Go on to check in other places in case an existing typedef name
3241 // was not imported.
3242 }
3243
3244 if (needsAnonymousDeclarationNumber(D)) {
3245 // This is an anonymous declaration that we may need to merge. Look it up
3246 // in its context by number.
3247 if (auto *Existing = getAnonymousDeclForMerging(
3248 Reader, D->getLexicalDeclContext(), AnonymousDeclNumber))
3249 if (isSameEntity(Existing, D))
3250 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3251 TypedefNameForLinkage);
3252 } else if (DC->isTranslationUnit() &&
3253 !Reader.getContext().getLangOpts().CPlusPlus) {
3254 IdentifierResolver &IdResolver = Reader.getIdResolver();
3255
3256 // Temporarily consider the identifier to be up-to-date. We don't want to
3257 // cause additional lookups here.
3258 class UpToDateIdentifierRAII {
3259 IdentifierInfo *II;
3260 bool WasOutToDate = false;
3261
3262 public:
3263 explicit UpToDateIdentifierRAII(IdentifierInfo *II) : II(II) {
3264 if (II) {
3265 WasOutToDate = II->isOutOfDate();
3266 if (WasOutToDate)
3267 II->setOutOfDate(false);
3268 }
3269 }
3270
3271 ~UpToDateIdentifierRAII() {
3272 if (WasOutToDate)
3273 II->setOutOfDate(true);
3274 }
3275 } UpToDate(Name.getAsIdentifierInfo());
3276
3277 for (IdentifierResolver::iterator I = IdResolver.begin(Name),
3278 IEnd = IdResolver.end();
3279 I != IEnd; ++I) {
3280 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3281 if (isSameEntity(Existing, D))
3282 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3283 TypedefNameForLinkage);
3284 }
3285 } else if (DeclContext *MergeDC = getPrimaryContextForMerging(Reader, DC)) {
3286 DeclContext::lookup_result R = MergeDC->noload_lookup(Name);
3287 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
3288 if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))
3289 if (isSameEntity(Existing, D))
3290 return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,
3291 TypedefNameForLinkage);
3292 }
3293 } else {
3294 // Not in a mergeable context.
3295 return FindExistingResult(Reader);
3296 }
3297
3298 // If this declaration is from a merged context, make a note that we need to
3299 // check that the canonical definition of that context contains the decl.
3300 //
3301 // FIXME: We should do something similar if we merge two definitions of the
3302 // same template specialization into the same CXXRecordDecl.
3303 auto MergedDCIt = Reader.MergedDeclContexts.find(D->getLexicalDeclContext());
3304 if (MergedDCIt != Reader.MergedDeclContexts.end() &&
3305 MergedDCIt->second == D->getDeclContext())
3306 Reader.PendingOdrMergeChecks.push_back(D);
3307
3308 return FindExistingResult(Reader, D, /*Existing=*/nullptr,
3309 AnonymousDeclNumber, TypedefNameForLinkage);
3310}
3311
3312template<typename DeclT>
3313Decl *ASTDeclReader::getMostRecentDeclImpl(Redeclarable<DeclT> *D) {
3314 return D->RedeclLink.getLatestNotUpdated();
3315}
3316
3317Decl *ASTDeclReader::getMostRecentDeclImpl(...) {
3318 llvm_unreachable("getMostRecentDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("getMostRecentDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3318)
;
3319}
3320
3321Decl *ASTDeclReader::getMostRecentDecl(Decl *D) {
3322 assert(D)(static_cast <bool> (D) ? void (0) : __assert_fail ("D"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3322, __extension__ __PRETTY_FUNCTION__))
;
3323
3324 switch (D->getKind()) {
3325#define ABSTRACT_DECL(TYPE)
3326#define DECL(TYPE, BASE) \
3327 case Decl::TYPE: \
3328 return getMostRecentDeclImpl(cast<TYPE##Decl>(D));
3329#include "clang/AST/DeclNodes.inc"
3330 }
3331 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3331)
;
3332}
3333
3334Decl *ASTReader::getMostRecentExistingDecl(Decl *D) {
3335 return ASTDeclReader::getMostRecentDecl(D->getCanonicalDecl());
3336}
3337
3338template<typename DeclT>
3339void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3340 Redeclarable<DeclT> *D,
3341 Decl *Previous, Decl *Canon) {
3342 D->RedeclLink.setPrevious(cast<DeclT>(Previous));
3343 D->First = cast<DeclT>(Previous)->First;
3344}
3345
3346namespace clang {
3347
3348template<>
3349void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3350 Redeclarable<VarDecl> *D,
3351 Decl *Previous, Decl *Canon) {
3352 auto *VD = static_cast<VarDecl *>(D);
3353 auto *PrevVD = cast<VarDecl>(Previous);
3354 D->RedeclLink.setPrevious(PrevVD);
3355 D->First = PrevVD->First;
3356
3357 // We should keep at most one definition on the chain.
3358 // FIXME: Cache the definition once we've found it. Building a chain with
3359 // N definitions currently takes O(N^2) time here.
3360 if (VD->isThisDeclarationADefinition() == VarDecl::Definition) {
3361 for (VarDecl *CurD = PrevVD; CurD; CurD = CurD->getPreviousDecl()) {
3362 if (CurD->isThisDeclarationADefinition() == VarDecl::Definition) {
3363 Reader.mergeDefinitionVisibility(CurD, VD);
3364 VD->demoteThisDefinitionToDeclaration();
3365 break;
3366 }
3367 }
3368 }
3369}
3370
3371template<>
3372void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader,
3373 Redeclarable<FunctionDecl> *D,
3374 Decl *Previous, Decl *Canon) {
3375 auto *FD = static_cast<FunctionDecl *>(D);
3376 auto *PrevFD = cast<FunctionDecl>(Previous);
3377
3378 FD->RedeclLink.setPrevious(PrevFD);
3379 FD->First = PrevFD->First;
3380
3381 // If the previous declaration is an inline function declaration, then this
3382 // declaration is too.
3383 if (PrevFD->IsInline != FD->IsInline) {
3384 // FIXME: [dcl.fct.spec]p4:
3385 // If a function with external linkage is declared inline in one
3386 // translation unit, it shall be declared inline in all translation
3387 // units in which it appears.
3388 //
3389 // Be careful of this case:
3390 //
3391 // module A:
3392 // template<typename T> struct X { void f(); };
3393 // template<typename T> inline void X<T>::f() {}
3394 //
3395 // module B instantiates the declaration of X<int>::f
3396 // module C instantiates the definition of X<int>::f
3397 //
3398 // If module B and C are merged, we do not have a violation of this rule.
3399 FD->IsInline = true;
3400 }
3401
3402 // If we need to propagate an exception specification along the redecl
3403 // chain, make a note of that so that we can do so later.
3404 auto *FPT = FD->getType()->getAs<FunctionProtoType>();
3405 auto *PrevFPT = PrevFD->getType()->getAs<FunctionProtoType>();
3406 if (FPT && PrevFPT) {
3407 bool IsUnresolved = isUnresolvedExceptionSpec(FPT->getExceptionSpecType());
3408 bool WasUnresolved =
3409 isUnresolvedExceptionSpec(PrevFPT->getExceptionSpecType());
3410 if (IsUnresolved != WasUnresolved)
3411 Reader.PendingExceptionSpecUpdates.insert(
3412 std::make_pair(Canon, IsUnresolved ? PrevFD : FD));
3413 }
3414}
3415
3416} // namespace clang
3417
3418void ASTDeclReader::attachPreviousDeclImpl(ASTReader &Reader, ...) {
3419 llvm_unreachable("attachPreviousDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachPreviousDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3419)
;
3420}
3421
3422/// Inherit the default template argument from \p From to \p To. Returns
3423/// \c false if there is no default template for \p From.
3424template <typename ParmDecl>
3425static bool inheritDefaultTemplateArgument(ASTContext &Context, ParmDecl *From,
3426 Decl *ToD) {
3427 auto *To = cast<ParmDecl>(ToD);
3428 if (!From->hasDefaultArgument())
3429 return false;
3430 To->setInheritedDefaultArgument(Context, From);
3431 return true;
3432}
3433
3434static void inheritDefaultTemplateArguments(ASTContext &Context,
3435 TemplateDecl *From,
3436 TemplateDecl *To) {
3437 auto *FromTP = From->getTemplateParameters();
3438 auto *ToTP = To->getTemplateParameters();
3439 assert(FromTP->size() == ToTP->size() && "merged mismatched templates?")(static_cast <bool> (FromTP->size() == ToTP->size
() && "merged mismatched templates?") ? void (0) : __assert_fail
("FromTP->size() == ToTP->size() && \"merged mismatched templates?\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3439, __extension__ __PRETTY_FUNCTION__))
;
3440
3441 for (unsigned I = 0, N = FromTP->size(); I != N; ++I) {
3442 NamedDecl *FromParam = FromTP->getParam(N - I - 1);
3443 if (FromParam->isParameterPack())
3444 continue;
3445 NamedDecl *ToParam = ToTP->getParam(N - I - 1);
3446
3447 if (auto *FTTP = dyn_cast<TemplateTypeParmDecl>(FromParam)) {
3448 if (!inheritDefaultTemplateArgument(Context, FTTP, ToParam))
3449 break;
3450 } else if (auto *FNTTP = dyn_cast<NonTypeTemplateParmDecl>(FromParam)) {
3451 if (!inheritDefaultTemplateArgument(Context, FNTTP, ToParam))
3452 break;
3453 } else {
3454 if (!inheritDefaultTemplateArgument(
3455 Context, cast<TemplateTemplateParmDecl>(FromParam), ToParam))
3456 break;
3457 }
3458 }
3459}
3460
3461void ASTDeclReader::attachPreviousDecl(ASTReader &Reader, Decl *D,
3462 Decl *Previous, Decl *Canon) {
3463 assert(D && Previous)(static_cast <bool> (D && Previous) ? void (0) :
__assert_fail ("D && Previous", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3463, __extension__ __PRETTY_FUNCTION__))
;
3464
3465 switch (D->getKind()) {
3466#define ABSTRACT_DECL(TYPE)
3467#define DECL(TYPE, BASE) \
3468 case Decl::TYPE: \
3469 attachPreviousDeclImpl(Reader, cast<TYPE##Decl>(D), Previous, Canon); \
3470 break;
3471#include "clang/AST/DeclNodes.inc"
3472 }
3473
3474 // If the declaration was visible in one module, a redeclaration of it in
3475 // another module remains visible even if it wouldn't be visible by itself.
3476 //
3477 // FIXME: In this case, the declaration should only be visible if a module
3478 // that makes it visible has been imported.
3479 D->IdentifierNamespace |=
3480 Previous->IdentifierNamespace &
3481 (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
3482
3483 // If the declaration declares a template, it may inherit default arguments
3484 // from the previous declaration.
3485 if (auto *TD = dyn_cast<TemplateDecl>(D))
3486 inheritDefaultTemplateArguments(Reader.getContext(),
3487 cast<TemplateDecl>(Previous), TD);
3488}
3489
3490template<typename DeclT>
3491void ASTDeclReader::attachLatestDeclImpl(Redeclarable<DeclT> *D, Decl *Latest) {
3492 D->RedeclLink.setLatest(cast<DeclT>(Latest));
3493}
3494
3495void ASTDeclReader::attachLatestDeclImpl(...) {
3496 llvm_unreachable("attachLatestDecl on non-redeclarable declaration")::llvm::llvm_unreachable_internal("attachLatestDecl on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3496)
;
3497}
3498
3499void ASTDeclReader::attachLatestDecl(Decl *D, Decl *Latest) {
3500 assert(D && Latest)(static_cast <bool> (D && Latest) ? void (0) : __assert_fail
("D && Latest", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3500, __extension__ __PRETTY_FUNCTION__))
;
3501
3502 switch (D->getKind()) {
3503#define ABSTRACT_DECL(TYPE)
3504#define DECL(TYPE, BASE) \
3505 case Decl::TYPE: \
3506 attachLatestDeclImpl(cast<TYPE##Decl>(D), Latest); \
3507 break;
3508#include "clang/AST/DeclNodes.inc"
3509 }
3510}
3511
3512template<typename DeclT>
3513void ASTDeclReader::markIncompleteDeclChainImpl(Redeclarable<DeclT> *D) {
3514 D->RedeclLink.markIncomplete();
3515}
3516
3517void ASTDeclReader::markIncompleteDeclChainImpl(...) {
3518 llvm_unreachable("markIncompleteDeclChain on non-redeclarable declaration")::llvm::llvm_unreachable_internal("markIncompleteDeclChain on non-redeclarable declaration"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3518)
;
3519}
3520
3521void ASTReader::markIncompleteDeclChain(Decl *D) {
3522 switch (D->getKind()) {
3523#define ABSTRACT_DECL(TYPE)
3524#define DECL(TYPE, BASE) \
3525 case Decl::TYPE: \
3526 ASTDeclReader::markIncompleteDeclChainImpl(cast<TYPE##Decl>(D)); \
3527 break;
3528#include "clang/AST/DeclNodes.inc"
3529 }
3530}
3531
3532/// Read the declaration at the given offset from the AST file.
3533Decl *ASTReader::ReadDeclRecord(DeclID ID) {
3534 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
3535 SourceLocation DeclLoc;
3536 RecordLocation Loc = DeclCursorForID(ID, DeclLoc);
3537 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
3538 // Keep track of where we are in the stream, then jump back there
3539 // after reading this declaration.
3540 SavedStreamPosition SavedPosition(DeclsCursor);
3541
3542 ReadingKindTracker ReadingKind(Read_Decl, *this);
3543
3544 // Note that we are loading a declaration record.
3545 Deserializing ADecl(this);
3546
3547 DeclsCursor.JumpToBit(Loc.Offset);
3548 ASTRecordReader Record(*this, *Loc.F);
3549 ASTDeclReader Reader(*this, Record, Loc, ID, DeclLoc);
3550 unsigned Code = DeclsCursor.ReadCode();
3551
3552 ASTContext &Context = getContext();
3553 Decl *D = nullptr;
3554 switch ((DeclCode)Record.readRecord(DeclsCursor, Code)) {
3555 case DECL_CONTEXT_LEXICAL:
3556 case DECL_CONTEXT_VISIBLE:
3557 llvm_unreachable("Record cannot be de-serialized with ReadDeclRecord")::llvm::llvm_unreachable_internal("Record cannot be de-serialized with ReadDeclRecord"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3557)
;
3558 case DECL_TYPEDEF:
3559 D = TypedefDecl::CreateDeserialized(Context, ID);
3560 break;
3561 case DECL_TYPEALIAS:
3562 D = TypeAliasDecl::CreateDeserialized(Context, ID);
3563 break;
3564 case DECL_ENUM:
3565 D = EnumDecl::CreateDeserialized(Context, ID);
3566 break;
3567 case DECL_RECORD:
3568 D = RecordDecl::CreateDeserialized(Context, ID);
3569 break;
3570 case DECL_ENUM_CONSTANT:
3571 D = EnumConstantDecl::CreateDeserialized(Context, ID);
3572 break;
3573 case DECL_FUNCTION:
3574 D = FunctionDecl::CreateDeserialized(Context, ID);
3575 break;
3576 case DECL_LINKAGE_SPEC:
3577 D = LinkageSpecDecl::CreateDeserialized(Context, ID);
3578 break;
3579 case DECL_EXPORT:
3580 D = ExportDecl::CreateDeserialized(Context, ID);
3581 break;
3582 case DECL_LABEL:
3583 D = LabelDecl::CreateDeserialized(Context, ID);
3584 break;
3585 case DECL_NAMESPACE:
3586 D = NamespaceDecl::CreateDeserialized(Context, ID);
3587 break;
3588 case DECL_NAMESPACE_ALIAS:
3589 D = NamespaceAliasDecl::CreateDeserialized(Context, ID);
3590 break;
3591 case DECL_USING:
3592 D = UsingDecl::CreateDeserialized(Context, ID);
3593 break;
3594 case DECL_USING_PACK:
3595 D = UsingPackDecl::CreateDeserialized(Context, ID, Record.readInt());
3596 break;
3597 case DECL_USING_SHADOW:
3598 D = UsingShadowDecl::CreateDeserialized(Context, ID);
3599 break;
3600 case DECL_CONSTRUCTOR_USING_SHADOW:
3601 D = ConstructorUsingShadowDecl::CreateDeserialized(Context, ID);
3602 break;
3603 case DECL_USING_DIRECTIVE:
3604 D = UsingDirectiveDecl::CreateDeserialized(Context, ID);
3605 break;
3606 case DECL_UNRESOLVED_USING_VALUE:
3607 D = UnresolvedUsingValueDecl::CreateDeserialized(Context, ID);
3608 break;
3609 case DECL_UNRESOLVED_USING_TYPENAME:
3610 D = UnresolvedUsingTypenameDecl::CreateDeserialized(Context, ID);
3611 break;
3612 case DECL_CXX_RECORD:
3613 D = CXXRecordDecl::CreateDeserialized(Context, ID);
3614 break;
3615 case DECL_CXX_DEDUCTION_GUIDE:
3616 D = CXXDeductionGuideDecl::CreateDeserialized(Context, ID);
3617 break;
3618 case DECL_CXX_METHOD:
3619 D = CXXMethodDecl::CreateDeserialized(Context, ID);
3620 break;
3621 case DECL_CXX_CONSTRUCTOR:
3622 D = CXXConstructorDecl::CreateDeserialized(Context, ID, false);
3623 break;
3624 case DECL_CXX_INHERITED_CONSTRUCTOR:
3625 D = CXXConstructorDecl::CreateDeserialized(Context, ID, true);
3626 break;
3627 case DECL_CXX_DESTRUCTOR:
3628 D = CXXDestructorDecl::CreateDeserialized(Context, ID);
3629 break;
3630 case DECL_CXX_CONVERSION:
3631 D = CXXConversionDecl::CreateDeserialized(Context, ID);
3632 break;
3633 case DECL_ACCESS_SPEC:
3634 D = AccessSpecDecl::CreateDeserialized(Context, ID);
3635 break;
3636 case DECL_FRIEND:
3637 D = FriendDecl::CreateDeserialized(Context, ID, Record.readInt());
3638 break;
3639 case DECL_FRIEND_TEMPLATE:
3640 D = FriendTemplateDecl::CreateDeserialized(Context, ID);
3641 break;
3642 case DECL_CLASS_TEMPLATE:
3643 D = ClassTemplateDecl::CreateDeserialized(Context, ID);
3644 break;
3645 case DECL_CLASS_TEMPLATE_SPECIALIZATION:
3646 D = ClassTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3647 break;
3648 case DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION:
3649 D = ClassTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3650 break;
3651 case DECL_VAR_TEMPLATE:
3652 D = VarTemplateDecl::CreateDeserialized(Context, ID);
3653 break;
3654 case DECL_VAR_TEMPLATE_SPECIALIZATION:
3655 D = VarTemplateSpecializationDecl::CreateDeserialized(Context, ID);
3656 break;
3657 case DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION:
3658 D = VarTemplatePartialSpecializationDecl::CreateDeserialized(Context, ID);
3659 break;
3660 case DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION:
3661 D = ClassScopeFunctionSpecializationDecl::CreateDeserialized(Context, ID);
3662 break;
3663 case DECL_FUNCTION_TEMPLATE:
3664 D = FunctionTemplateDecl::CreateDeserialized(Context, ID);
3665 break;
3666 case DECL_TEMPLATE_TYPE_PARM:
3667 D = TemplateTypeParmDecl::CreateDeserialized(Context, ID);
3668 break;
3669 case DECL_NON_TYPE_TEMPLATE_PARM:
3670 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID);
3671 break;
3672 case DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK:
3673 D = NonTypeTemplateParmDecl::CreateDeserialized(Context, ID,
3674 Record.readInt());
3675 break;
3676 case DECL_TEMPLATE_TEMPLATE_PARM:
3677 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID);
3678 break;
3679 case DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK:
3680 D = TemplateTemplateParmDecl::CreateDeserialized(Context, ID,
3681 Record.readInt());
3682 break;
3683 case DECL_TYPE_ALIAS_TEMPLATE:
3684 D = TypeAliasTemplateDecl::CreateDeserialized(Context, ID);
3685 break;
3686 case DECL_STATIC_ASSERT:
3687 D = StaticAssertDecl::CreateDeserialized(Context, ID);
3688 break;
3689 case DECL_OBJC_METHOD:
3690 D = ObjCMethodDecl::CreateDeserialized(Context, ID);
3691 break;
3692 case DECL_OBJC_INTERFACE:
3693 D = ObjCInterfaceDecl::CreateDeserialized(Context, ID);
3694 break;
3695 case DECL_OBJC_IVAR:
3696 D = ObjCIvarDecl::CreateDeserialized(Context, ID);
3697 break;
3698 case DECL_OBJC_PROTOCOL:
3699 D = ObjCProtocolDecl::CreateDeserialized(Context, ID);
3700 break;
3701 case DECL_OBJC_AT_DEFS_FIELD:
3702 D = ObjCAtDefsFieldDecl::CreateDeserialized(Context, ID);
3703 break;
3704 case DECL_OBJC_CATEGORY:
3705 D = ObjCCategoryDecl::CreateDeserialized(Context, ID);
3706 break;
3707 case DECL_OBJC_CATEGORY_IMPL:
3708 D = ObjCCategoryImplDecl::CreateDeserialized(Context, ID);
3709 break;
3710 case DECL_OBJC_IMPLEMENTATION:
3711 D = ObjCImplementationDecl::CreateDeserialized(Context, ID);
3712 break;
3713 case DECL_OBJC_COMPATIBLE_ALIAS:
3714 D = ObjCCompatibleAliasDecl::CreateDeserialized(Context, ID);
3715 break;
3716 case DECL_OBJC_PROPERTY:
3717 D = ObjCPropertyDecl::CreateDeserialized(Context, ID);
3718 break;
3719 case DECL_OBJC_PROPERTY_IMPL:
3720 D = ObjCPropertyImplDecl::CreateDeserialized(Context, ID);
3721 break;
3722 case DECL_FIELD:
3723 D = FieldDecl::CreateDeserialized(Context, ID);
3724 break;
3725 case DECL_INDIRECTFIELD:
3726 D = IndirectFieldDecl::CreateDeserialized(Context, ID);
3727 break;
3728 case DECL_VAR:
3729 D = VarDecl::CreateDeserialized(Context, ID);
3730 break;
3731 case DECL_IMPLICIT_PARAM:
3732 D = ImplicitParamDecl::CreateDeserialized(Context, ID);
3733 break;
3734 case DECL_PARM_VAR:
3735 D = ParmVarDecl::CreateDeserialized(Context, ID);
3736 break;
3737 case DECL_DECOMPOSITION:
3738 D = DecompositionDecl::CreateDeserialized(Context, ID, Record.readInt());
3739 break;
3740 case DECL_BINDING:
3741 D = BindingDecl::CreateDeserialized(Context, ID);
3742 break;
3743 case DECL_FILE_SCOPE_ASM:
3744 D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
3745 break;
3746 case DECL_BLOCK:
3747 D = BlockDecl::CreateDeserialized(Context, ID);
3748 break;
3749 case DECL_MS_PROPERTY:
3750 D = MSPropertyDecl::CreateDeserialized(Context, ID);
3751 break;
3752 case DECL_CAPTURED:
3753 D = CapturedDecl::CreateDeserialized(Context, ID, Record.readInt());
3754 break;
3755 case DECL_CXX_BASE_SPECIFIERS:
3756 Error("attempt to read a C++ base-specifier record as a declaration");
3757 return nullptr;
3758 case DECL_CXX_CTOR_INITIALIZERS:
3759 Error("attempt to read a C++ ctor initializer record as a declaration");
3760 return nullptr;
3761 case DECL_IMPORT:
3762 // Note: last entry of the ImportDecl record is the number of stored source
3763 // locations.
3764 D = ImportDecl::CreateDeserialized(Context, ID, Record.back());
3765 break;
3766 case DECL_OMP_THREADPRIVATE:
3767 D = OMPThreadPrivateDecl::CreateDeserialized(Context, ID, Record.readInt());
3768 break;
3769 case DECL_OMP_DECLARE_REDUCTION:
3770 D = OMPDeclareReductionDecl::CreateDeserialized(Context, ID);
3771 break;
3772 case DECL_OMP_CAPTUREDEXPR:
3773 D = OMPCapturedExprDecl::CreateDeserialized(Context, ID);
3774 break;
3775 case DECL_PRAGMA_COMMENT:
3776 D = PragmaCommentDecl::CreateDeserialized(Context, ID, Record.readInt());
3777 break;
3778 case DECL_PRAGMA_DETECT_MISMATCH:
3779 D = PragmaDetectMismatchDecl::CreateDeserialized(Context, ID,
3780 Record.readInt());
3781 break;
3782 case DECL_EMPTY:
3783 D = EmptyDecl::CreateDeserialized(Context, ID);
3784 break;
3785 case DECL_OBJC_TYPE_PARAM:
3786 D = ObjCTypeParamDecl::CreateDeserialized(Context, ID);
3787 break;
3788 }
3789
3790 assert(D && "Unknown declaration reading AST file")(static_cast <bool> (D && "Unknown declaration reading AST file"
) ? void (0) : __assert_fail ("D && \"Unknown declaration reading AST file\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3790, __extension__ __PRETTY_FUNCTION__))
;
3791 LoadedDecl(Index, D);
3792 // Set the DeclContext before doing any deserialization, to make sure internal
3793 // calls to Decl::getASTContext() by Decl's methods will find the
3794 // TranslationUnitDecl without crashing.
3795 D->setDeclContext(Context.getTranslationUnitDecl());
3796 Reader.Visit(D);
3797
3798 // If this declaration is also a declaration context, get the
3799 // offsets for its tables of lexical and visible declarations.
3800 if (auto *DC = dyn_cast<DeclContext>(D)) {
3801 std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
3802 if (Offsets.first &&
3803 ReadLexicalDeclContextStorage(*Loc.F, DeclsCursor, Offsets.first, DC))
3804 return nullptr;
3805 if (Offsets.second &&
3806 ReadVisibleDeclContextStorage(*Loc.F, DeclsCursor, Offsets.second, ID))
3807 return nullptr;
3808 }
3809 assert(Record.getIdx() == Record.size())(static_cast <bool> (Record.getIdx() == Record.size()) ?
void (0) : __assert_fail ("Record.getIdx() == Record.size()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3809, __extension__ __PRETTY_FUNCTION__))
;
3810
3811 // Load any relevant update records.
3812 PendingUpdateRecords.push_back(
3813 PendingUpdateRecord(ID, D, /*JustLoaded=*/true));
3814
3815 // Load the categories after recursive loading is finished.
3816 if (auto *Class = dyn_cast<ObjCInterfaceDecl>(D))
3817 // If we already have a definition when deserializing the ObjCInterfaceDecl,
3818 // we put the Decl in PendingDefinitions so we can pull the categories here.
3819 if (Class->isThisDeclarationADefinition() ||
3820 PendingDefinitions.count(Class))
3821 loadObjCCategories(ID, Class);
3822
3823 // If we have deserialized a declaration that has a definition the
3824 // AST consumer might need to know about, queue it.
3825 // We don't pass it to the consumer immediately because we may be in recursive
3826 // loading, and some declarations may still be initializing.
3827 PotentiallyInterestingDecls.push_back(
3828 InterestingDecl(D, Reader.hasPendingBody()));
3829
3830 return D;
3831}
3832
3833void ASTReader::PassInterestingDeclsToConsumer() {
3834 assert(Consumer)(static_cast <bool> (Consumer) ? void (0) : __assert_fail
("Consumer", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3834, __extension__ __PRETTY_FUNCTION__))
;
3835
3836 if (PassingDeclsToConsumer)
3837 return;
3838
3839 // Guard variable to avoid recursively redoing the process of passing
3840 // decls to consumer.
3841 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
3842 true);
3843
3844 // Ensure that we've loaded all potentially-interesting declarations
3845 // that need to be eagerly loaded.
3846 for (auto ID : EagerlyDeserializedDecls)
3847 GetDecl(ID);
3848 EagerlyDeserializedDecls.clear();
3849
3850 while (!PotentiallyInterestingDecls.empty()) {
3851 InterestingDecl D = PotentiallyInterestingDecls.front();
3852 PotentiallyInterestingDecls.pop_front();
3853 if (isConsumerInterestedIn(getContext(), D.getDecl(), D.hasPendingBody()))
3854 PassInterestingDeclToConsumer(D.getDecl());
3855 }
3856}
3857
3858void ASTReader::loadDeclUpdateRecords(PendingUpdateRecord &Record) {
3859 // The declaration may have been modified by files later in the chain.
3860 // If this is the case, read the record containing the updates from each file
3861 // and pass it to ASTDeclReader to make the modifications.
3862 serialization::GlobalDeclID ID = Record.ID;
3863 Decl *D = Record.D;
3864 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
3865 DeclUpdateOffsetsMap::iterator UpdI = DeclUpdateOffsets.find(ID);
3866
3867 SmallVector<serialization::DeclID, 8> PendingLazySpecializationIDs;
3868
3869 if (UpdI != DeclUpdateOffsets.end()) {
1
Assuming the condition is false
2
Taking false branch
3870 auto UpdateOffsets = std::move(UpdI->second);
3871 DeclUpdateOffsets.erase(UpdI);
3872
3873 // Check if this decl was interesting to the consumer. If we just loaded
3874 // the declaration, then we know it was interesting and we skip the call
3875 // to isConsumerInterestedIn because it is unsafe to call in the
3876 // current ASTReader state.
3877 bool WasInteresting =
3878 Record.JustLoaded || isConsumerInterestedIn(getContext(), D, false);
3879 for (auto &FileAndOffset : UpdateOffsets) {
3880 ModuleFile *F = FileAndOffset.first;
3881 uint64_t Offset = FileAndOffset.second;
3882 llvm::BitstreamCursor &Cursor = F->DeclsCursor;
3883 SavedStreamPosition SavedPosition(Cursor);
3884 Cursor.JumpToBit(Offset);
3885 unsigned Code = Cursor.ReadCode();
3886 ASTRecordReader Record(*this, *F);
3887 unsigned RecCode = Record.readRecord(Cursor, Code);
3888 (void)RecCode;
3889 assert(RecCode == DECL_UPDATES && "Expected DECL_UPDATES record!")(static_cast <bool> (RecCode == DECL_UPDATES &&
"Expected DECL_UPDATES record!") ? void (0) : __assert_fail (
"RecCode == DECL_UPDATES && \"Expected DECL_UPDATES record!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3889, __extension__ __PRETTY_FUNCTION__))
;
3890
3891 ASTDeclReader Reader(*this, Record, RecordLocation(F, Offset), ID,
3892 SourceLocation());
3893 Reader.UpdateDecl(D, PendingLazySpecializationIDs);
3894
3895 // We might have made this declaration interesting. If so, remember that
3896 // we need to hand it off to the consumer.
3897 if (!WasInteresting &&
3898 isConsumerInterestedIn(getContext(), D, Reader.hasPendingBody())) {
3899 PotentiallyInterestingDecls.push_back(
3900 InterestingDecl(D, Reader.hasPendingBody()));
3901 WasInteresting = true;
3902 }
3903 }
3904 }
3905 // Add the lazy specializations to the template.
3906 assert((PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) ||(static_cast <bool> ((PendingLazySpecializationIDs.empty
() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl
>(D) || isa<VarTemplateDecl>(D)) && "Must not have pending specializations"
) ? void (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3908, __extension__ __PRETTY_FUNCTION__))
3907 isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) &&(static_cast <bool> ((PendingLazySpecializationIDs.empty
() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl
>(D) || isa<VarTemplateDecl>(D)) && "Must not have pending specializations"
) ? void (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3908, __extension__ __PRETTY_FUNCTION__))
3908 "Must not have pending specializations")(static_cast <bool> ((PendingLazySpecializationIDs.empty
() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl
>(D) || isa<VarTemplateDecl>(D)) && "Must not have pending specializations"
) ? void (0) : __assert_fail ("(PendingLazySpecializationIDs.empty() || isa<ClassTemplateDecl>(D) || isa<FunctionTemplateDecl>(D) || isa<VarTemplateDecl>(D)) && \"Must not have pending specializations\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3908, __extension__ __PRETTY_FUNCTION__))
;
3909 if (auto *CTD = dyn_cast<ClassTemplateDecl>(D))
3
Taking false branch
3910 ASTDeclReader::AddLazySpecializations(CTD, PendingLazySpecializationIDs);
3911 else if (auto *FTD = dyn_cast<FunctionTemplateDecl>(D))
4
Taking false branch
3912 ASTDeclReader::AddLazySpecializations(FTD, PendingLazySpecializationIDs);
3913 else if (auto *VTD = dyn_cast<VarTemplateDecl>(D))
5
Taking false branch
3914 ASTDeclReader::AddLazySpecializations(VTD, PendingLazySpecializationIDs);
3915 PendingLazySpecializationIDs.clear();
3916
3917 // Load the pending visible updates for this decl context, if it has any.
3918 auto I = PendingVisibleUpdates.find(ID);
3919 if (I != PendingVisibleUpdates.end()) {
6
Assuming the condition is true
7
Taking true branch
3920 auto VisibleUpdates = std::move(I->second);
3921 PendingVisibleUpdates.erase(I);
3922
3923 auto *DC = cast<DeclContext>(D)->getPrimaryContext();
3924 for (const auto &Update : VisibleUpdates)
8
Assuming '__begin2' is not equal to '__end2'
3925 Lookups[DC].Table.add(
9
Calling 'MultiOnDiskHashTable::add'
3926 Update.Mod, Update.Data,
3927 reader::ASTDeclContextNameLookupTrait(*this, *Update.Mod));
3928 DC->setHasExternalVisibleStorage(true);
3929 }
3930}
3931
3932void ASTReader::loadPendingDeclChain(Decl *FirstLocal, uint64_t LocalOffset) {
3933 // Attach FirstLocal to the end of the decl chain.
3934 Decl *CanonDecl = FirstLocal->getCanonicalDecl();
3935 if (FirstLocal != CanonDecl) {
3936 Decl *PrevMostRecent = ASTDeclReader::getMostRecentDecl(CanonDecl);
3937 ASTDeclReader::attachPreviousDecl(
3938 *this, FirstLocal, PrevMostRecent ? PrevMostRecent : CanonDecl,
3939 CanonDecl);
3940 }
3941
3942 if (!LocalOffset) {
3943 ASTDeclReader::attachLatestDecl(CanonDecl, FirstLocal);
3944 return;
3945 }
3946
3947 // Load the list of other redeclarations from this module file.
3948 ModuleFile *M = getOwningModuleFile(FirstLocal);
3949 assert(M && "imported decl from no module file")(static_cast <bool> (M && "imported decl from no module file"
) ? void (0) : __assert_fail ("M && \"imported decl from no module file\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3949, __extension__ __PRETTY_FUNCTION__))
;
3950
3951 llvm::BitstreamCursor &Cursor = M->DeclsCursor;
3952 SavedStreamPosition SavedPosition(Cursor);
3953 Cursor.JumpToBit(LocalOffset);
3954
3955 RecordData Record;
3956 unsigned Code = Cursor.ReadCode();
3957 unsigned RecCode = Cursor.readRecord(Code, Record);
3958 (void)RecCode;
3959 assert(RecCode == LOCAL_REDECLARATIONS && "expected LOCAL_REDECLARATIONS record!")(static_cast <bool> (RecCode == LOCAL_REDECLARATIONS &&
"expected LOCAL_REDECLARATIONS record!") ? void (0) : __assert_fail
("RecCode == LOCAL_REDECLARATIONS && \"expected LOCAL_REDECLARATIONS record!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 3959, __extension__ __PRETTY_FUNCTION__))
;
3960
3961 // FIXME: We have several different dispatches on decl kind here; maybe
3962 // we should instead generate one loop per kind and dispatch up-front?
3963 Decl *MostRecent = FirstLocal;
3964 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3965 auto *D = GetLocalDecl(*M, Record[N - I - 1]);
3966 ASTDeclReader::attachPreviousDecl(*this, D, MostRecent, CanonDecl);
3967 MostRecent = D;
3968 }
3969 ASTDeclReader::attachLatestDecl(CanonDecl, MostRecent);
3970}
3971
3972namespace {
3973
3974 /// Given an ObjC interface, goes through the modules and links to the
3975 /// interface all the categories for it.
3976 class ObjCCategoriesVisitor {
3977 ASTReader &Reader;
3978 ObjCInterfaceDecl *Interface;
3979 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized;
3980 ObjCCategoryDecl *Tail = nullptr;
3981 llvm::DenseMap<DeclarationName, ObjCCategoryDecl *> NameCategoryMap;
3982 serialization::GlobalDeclID InterfaceID;
3983 unsigned PreviousGeneration;
3984
3985 void add(ObjCCategoryDecl *Cat) {
3986 // Only process each category once.
3987 if (!Deserialized.erase(Cat))
3988 return;
3989
3990 // Check for duplicate categories.
3991 if (Cat->getDeclName()) {
3992 ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];
3993 if (Existing &&
3994 Reader.getOwningModuleFile(Existing)
3995 != Reader.getOwningModuleFile(Cat)) {
3996 // FIXME: We should not warn for duplicates in diamond:
3997 //
3998 // MT //
3999 // / \ //
4000 // ML MR //
4001 // \ / //
4002 // MB //
4003 //
4004 // If there are duplicates in ML/MR, there will be warning when
4005 // creating MB *and* when importing MB. We should not warn when
4006 // importing.
4007 Reader.Diag(Cat->getLocation(), diag::warn_dup_category_def)
4008 << Interface->getDeclName() << Cat->getDeclName();
4009 Reader.Diag(Existing->getLocation(), diag::note_previous_definition);
4010 } else if (!Existing) {
4011 // Record this category.
4012 Existing = Cat;
4013 }
4014 }
4015
4016 // Add this category to the end of the chain.
4017 if (Tail)
4018 ASTDeclReader::setNextObjCCategory(Tail, Cat);
4019 else
4020 Interface->setCategoryListRaw(Cat);
4021 Tail = Cat;
4022 }
4023
4024 public:
4025 ObjCCategoriesVisitor(ASTReader &Reader,
4026 ObjCInterfaceDecl *Interface,
4027 llvm::SmallPtrSetImpl<ObjCCategoryDecl *> &Deserialized,
4028 serialization::GlobalDeclID InterfaceID,
4029 unsigned PreviousGeneration)
4030 : Reader(Reader), Interface(Interface), Deserialized(Deserialized),
4031 InterfaceID(InterfaceID), PreviousGeneration(PreviousGeneration) {
4032 // Populate the name -> category map with the set of known categories.
4033 for (auto *Cat : Interface->known_categories()) {
4034 if (Cat->getDeclName())
4035 NameCategoryMap[Cat->getDeclName()] = Cat;
4036
4037 // Keep track of the tail of the category list.
4038 Tail = Cat;
4039 }
4040 }
4041
4042 bool operator()(ModuleFile &M) {
4043 // If we've loaded all of the category information we care about from
4044 // this module file, we're done.
4045 if (M.Generation <= PreviousGeneration)
4046 return true;
4047
4048 // Map global ID of the definition down to the local ID used in this
4049 // module file. If there is no such mapping, we'll find nothing here
4050 // (or in any module it imports).
4051 DeclID LocalID = Reader.mapGlobalIDToModuleFileGlobalID(M, InterfaceID);
4052 if (!LocalID)
4053 return true;
4054
4055 // Perform a binary search to find the local redeclarations for this
4056 // declaration (if any).
4057 const ObjCCategoriesInfo Compare = { LocalID, 0 };
4058 const ObjCCategoriesInfo *Result
4059 = std::lower_bound(M.ObjCCategoriesMap,
4060 M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap,
4061 Compare);
4062 if (Result == M.ObjCCategoriesMap + M.LocalNumObjCCategoriesInMap ||
4063 Result->DefinitionID != LocalID) {
4064 // We didn't find anything. If the class definition is in this module
4065 // file, then the module files it depends on cannot have any categories,
4066 // so suppress further lookup.
4067 return Reader.isDeclIDFromModule(InterfaceID, M);
4068 }
4069
4070 // We found something. Dig out all of the categories.
4071 unsigned Offset = Result->Offset;
4072 unsigned N = M.ObjCCategories[Offset];
4073 M.ObjCCategories[Offset++] = 0; // Don't try to deserialize again
4074 for (unsigned I = 0; I != N; ++I)
4075 add(cast_or_null<ObjCCategoryDecl>(
4076 Reader.GetLocalDecl(M, M.ObjCCategories[Offset++])));
4077 return true;
4078 }
4079 };
4080
4081} // namespace
4082
4083void ASTReader::loadObjCCategories(serialization::GlobalDeclID ID,
4084 ObjCInterfaceDecl *D,
4085 unsigned PreviousGeneration) {
4086 ObjCCategoriesVisitor Visitor(*this, D, CategoriesDeserialized, ID,
4087 PreviousGeneration);
4088 ModuleMgr.visit(Visitor);
4089}
4090
4091template<typename DeclT, typename Fn>
4092static void forAllLaterRedecls(DeclT *D, Fn F) {
4093 F(D);
4094
4095 // Check whether we've already merged D into its redeclaration chain.
4096 // MostRecent may or may not be nullptr if D has not been merged. If
4097 // not, walk the merged redecl chain and see if it's there.
4098 auto *MostRecent = D->getMostRecentDecl();
4099 bool Found = false;
4100 for (auto *Redecl = MostRecent; Redecl && !Found;
4101 Redecl = Redecl->getPreviousDecl())
4102 Found = (Redecl == D);
4103
4104 // If this declaration is merged, apply the functor to all later decls.
4105 if (Found) {
4106 for (auto *Redecl = MostRecent; Redecl != D;
4107 Redecl = Redecl->getPreviousDecl())
4108 F(Redecl);
4109 }
4110}
4111
4112void ASTDeclReader::UpdateDecl(Decl *D,
4113 llvm::SmallVectorImpl<serialization::DeclID> &PendingLazySpecializationIDs) {
4114 while (Record.getIdx() < Record.size()) {
4115 switch ((DeclUpdateKind)Record.readInt()) {
4116 case UPD_CXX_ADDED_IMPLICIT_MEMBER: {
4117 auto *RD = cast<CXXRecordDecl>(D);
4118 // FIXME: If we also have an update record for instantiating the
4119 // definition of D, we need that to happen before we get here.
4120 Decl *MD = Record.readDecl();
4121 assert(MD && "couldn't read decl from update record")(static_cast <bool> (MD && "couldn't read decl from update record"
) ? void (0) : __assert_fail ("MD && \"couldn't read decl from update record\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4121, __extension__ __PRETTY_FUNCTION__))
;
4122 // FIXME: We should call addHiddenDecl instead, to add the member
4123 // to its DeclContext.
4124 RD->addedMember(MD);
4125 break;
4126 }
4127
4128 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4129 // It will be added to the template's lazy specialization set.
4130 PendingLazySpecializationIDs.push_back(ReadDeclID());
4131 break;
4132
4133 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE: {
4134 auto *Anon = ReadDeclAs<NamespaceDecl>();
4135
4136 // Each module has its own anonymous namespace, which is disjoint from
4137 // any other module's anonymous namespaces, so don't attach the anonymous
4138 // namespace at all.
4139 if (!Record.isModule()) {
4140 if (auto *TU = dyn_cast<TranslationUnitDecl>(D))
4141 TU->setAnonymousNamespace(Anon);
4142 else
4143 cast<NamespaceDecl>(D)->setAnonymousNamespace(Anon);
4144 }
4145 break;
4146 }
4147
4148 case UPD_CXX_ADDED_VAR_DEFINITION: {
4149 auto *VD = cast<VarDecl>(D);
4150 VD->NonParmVarDeclBits.IsInline = Record.readInt();
4151 VD->NonParmVarDeclBits.IsInlineSpecified = Record.readInt();
4152 uint64_t Val = Record.readInt();
4153 if (Val && !VD->getInit()) {
4154 VD->setInit(Record.readExpr());
4155 if (Val > 1) { // IsInitKnownICE = 1, IsInitNotICE = 2, IsInitICE = 3
4156 EvaluatedStmt *Eval = VD->ensureEvaluatedStmt();
4157 Eval->CheckedICE = true;
4158 Eval->IsICE = Val == 3;
4159 }
4160 }
4161 break;
4162 }
4163
4164 case UPD_CXX_POINT_OF_INSTANTIATION: {
4165 SourceLocation POI = Record.readSourceLocation();
4166 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D)) {
4167 VTSD->setPointOfInstantiation(POI);
4168 } else if (auto *VD = dyn_cast<VarDecl>(D)) {
4169 VD->getMemberSpecializationInfo()->setPointOfInstantiation(POI);
4170 } else {
4171 auto *FD = cast<FunctionDecl>(D);
4172 if (auto *FTSInfo = FD->TemplateOrSpecialization
4173 .dyn_cast<FunctionTemplateSpecializationInfo *>())
4174 FTSInfo->setPointOfInstantiation(POI);
4175 else
4176 FD->TemplateOrSpecialization.get<MemberSpecializationInfo *>()
4177 ->setPointOfInstantiation(POI);
4178 }
4179 break;
4180 }
4181
4182 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT: {
4183 auto *Param = cast<ParmVarDecl>(D);
4184
4185 // We have to read the default argument regardless of whether we use it
4186 // so that hypothetical further update records aren't messed up.
4187 // TODO: Add a function to skip over the next expr record.
4188 auto *DefaultArg = Record.readExpr();
4189
4190 // Only apply the update if the parameter still has an uninstantiated
4191 // default argument.
4192 if (Param->hasUninstantiatedDefaultArg())
4193 Param->setDefaultArg(DefaultArg);
4194 break;
4195 }
4196
4197 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER: {
4198 auto *FD = cast<FieldDecl>(D);
4199 auto *DefaultInit = Record.readExpr();
4200
4201 // Only apply the update if the field still has an uninstantiated
4202 // default member initializer.
4203 if (FD->hasInClassInitializer() && !FD->getInClassInitializer()) {
4204 if (DefaultInit)
4205 FD->setInClassInitializer(DefaultInit);
4206 else
4207 // Instantiation failed. We can get here if we serialized an AST for
4208 // an invalid program.
4209 FD->removeInClassInitializer();
4210 }
4211 break;
4212 }
4213
4214 case UPD_CXX_ADDED_FUNCTION_DEFINITION: {
4215 auto *FD = cast<FunctionDecl>(D);
4216 if (Reader.PendingBodies[FD]) {
4217 // FIXME: Maybe check for ODR violations.
4218 // It's safe to stop now because this update record is always last.
4219 return;
4220 }
4221
4222 if (Record.readInt()) {
4223 // Maintain AST consistency: any later redeclarations of this function
4224 // are inline if this one is. (We might have merged another declaration
4225 // into this one.)
4226 forAllLaterRedecls(FD, [](FunctionDecl *FD) {
4227 FD->setImplicitlyInline();
4228 });
4229 }
4230 FD->setInnerLocStart(ReadSourceLocation());
4231 ReadFunctionDefinition(FD);
4232 assert(Record.getIdx() == Record.size() && "lazy body must be last")(static_cast <bool> (Record.getIdx() == Record.size() &&
"lazy body must be last") ? void (0) : __assert_fail ("Record.getIdx() == Record.size() && \"lazy body must be last\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4232, __extension__ __PRETTY_FUNCTION__))
;
4233 break;
4234 }
4235
4236 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4237 auto *RD = cast<CXXRecordDecl>(D);
4238 auto *OldDD = RD->getCanonicalDecl()->DefinitionData;
4239 bool HadRealDefinition =
4240 OldDD && (OldDD->Definition != RD ||
4241 !Reader.PendingFakeDefinitionData.count(OldDD));
4242 RD->setParamDestroyedInCallee(Record.readInt());
4243 RD->setArgPassingRestrictions(
4244 (RecordDecl::ArgPassingKind)Record.readInt());
4245 ReadCXXRecordDefinition(RD, /*Update*/true);
4246
4247 // Visible update is handled separately.
4248 uint64_t LexicalOffset = ReadLocalOffset();
4249 if (!HadRealDefinition && LexicalOffset) {
4250 Record.readLexicalDeclContextStorage(LexicalOffset, RD);
4251 Reader.PendingFakeDefinitionData.erase(OldDD);
4252 }
4253
4254 auto TSK = (TemplateSpecializationKind)Record.readInt();
4255 SourceLocation POI = ReadSourceLocation();
4256 if (MemberSpecializationInfo *MSInfo =
4257 RD->getMemberSpecializationInfo()) {
4258 MSInfo->setTemplateSpecializationKind(TSK);
4259 MSInfo->setPointOfInstantiation(POI);
4260 } else {
4261 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4262 Spec->setTemplateSpecializationKind(TSK);
4263 Spec->setPointOfInstantiation(POI);
4264
4265 if (Record.readInt()) {
4266 auto *PartialSpec =
4267 ReadDeclAs<ClassTemplatePartialSpecializationDecl>();
4268 SmallVector<TemplateArgument, 8> TemplArgs;
4269 Record.readTemplateArgumentList(TemplArgs);
4270 auto *TemplArgList = TemplateArgumentList::CreateCopy(
4271 Reader.getContext(), TemplArgs);
4272
4273 // FIXME: If we already have a partial specialization set,
4274 // check that it matches.
4275 if (!Spec->getSpecializedTemplateOrPartial()
4276 .is<ClassTemplatePartialSpecializationDecl *>())
4277 Spec->setInstantiationOf(PartialSpec, TemplArgList);
4278 }
4279 }
4280
4281 RD->setTagKind((TagTypeKind)Record.readInt());
4282 RD->setLocation(ReadSourceLocation());
4283 RD->setLocStart(ReadSourceLocation());
4284 RD->setBraceRange(ReadSourceRange());
4285
4286 if (Record.readInt()) {
4287 AttrVec Attrs;
4288 Record.readAttributes(Attrs);
4289 // If the declaration already has attributes, we assume that some other
4290 // AST file already loaded them.
4291 if (!D->hasAttrs())
4292 D->setAttrsImpl(Attrs, Reader.getContext());
4293 }
4294 break;
4295 }
4296
4297 case UPD_CXX_RESOLVED_DTOR_DELETE: {
4298 // Set the 'operator delete' directly to avoid emitting another update
4299 // record.
4300 auto *Del = ReadDeclAs<FunctionDecl>();
4301 auto *First = cast<CXXDestructorDecl>(D->getCanonicalDecl());
4302 auto *ThisArg = Record.readExpr();
4303 // FIXME: Check consistency if we have an old and new operator delete.
4304 if (!First->OperatorDelete) {
4305 First->OperatorDelete = Del;
4306 First->OperatorDeleteThisArg = ThisArg;
4307 }
4308 break;
4309 }
4310
4311 case UPD_CXX_RESOLVED_EXCEPTION_SPEC: {
4312 FunctionProtoType::ExceptionSpecInfo ESI;
4313 SmallVector<QualType, 8> ExceptionStorage;
4314 Record.readExceptionSpec(ExceptionStorage, ESI);
4315
4316 // Update this declaration's exception specification, if needed.
4317 auto *FD = cast<FunctionDecl>(D);
4318 auto *FPT = FD->getType()->castAs<FunctionProtoType>();
4319 // FIXME: If the exception specification is already present, check that it
4320 // matches.
4321 if (isUnresolvedExceptionSpec(FPT->getExceptionSpecType())) {
4322 FD->setType(Reader.getContext().getFunctionType(
4323 FPT->getReturnType(), FPT->getParamTypes(),
4324 FPT->getExtProtoInfo().withExceptionSpec(ESI)));
4325
4326 // When we get to the end of deserializing, see if there are other decls
4327 // that we need to propagate this exception specification onto.
4328 Reader.PendingExceptionSpecUpdates.insert(
4329 std::make_pair(FD->getCanonicalDecl(), FD));
4330 }
4331 break;
4332 }
4333
4334 case UPD_CXX_DEDUCED_RETURN_TYPE: {
4335 // FIXME: Also do this when merging redecls.
4336 QualType DeducedResultType = Record.readType();
4337 for (auto *Redecl : merged_redecls(D)) {
4338 // FIXME: If the return type is already deduced, check that it matches.
4339 auto *FD = cast<FunctionDecl>(Redecl);
4340 Reader.getContext().adjustDeducedFunctionResultType(FD,
4341 DeducedResultType);
4342 }
4343 break;
4344 }
4345
4346 case UPD_DECL_MARKED_USED:
4347 // Maintain AST consistency: any later redeclarations are used too.
4348 D->markUsed(Reader.getContext());
4349 break;
4350
4351 case UPD_MANGLING_NUMBER:
4352 Reader.getContext().setManglingNumber(cast<NamedDecl>(D),
4353 Record.readInt());
4354 break;
4355
4356 case UPD_STATIC_LOCAL_NUMBER:
4357 Reader.getContext().setStaticLocalNumber(cast<VarDecl>(D),
4358 Record.readInt());
4359 break;
4360
4361 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4362 D->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(Reader.getContext(),
4363 ReadSourceRange()));
4364 break;
4365
4366 case UPD_DECL_EXPORTED: {
4367 unsigned SubmoduleID = readSubmoduleID();
4368 auto *Exported = cast<NamedDecl>(D);
4369 if (auto *TD = dyn_cast<TagDecl>(Exported))
4370 Exported = TD->getDefinition();
4371 Module *Owner = SubmoduleID ? Reader.getSubmodule(SubmoduleID) : nullptr;
4372 if (Reader.getContext().getLangOpts().ModulesLocalVisibility) {
4373 Reader.getContext().mergeDefinitionIntoModule(cast<NamedDecl>(Exported),
4374 Owner);
4375 Reader.PendingMergedDefinitionsToDeduplicate.insert(
4376 cast<NamedDecl>(Exported));
4377 } else if (Owner && Owner->NameVisibility != Module::AllVisible) {
4378 // If Owner is made visible at some later point, make this declaration
4379 // visible too.
4380 Reader.HiddenNamesMap[Owner].push_back(Exported);
4381 } else {
4382 // The declaration is now visible.
4383 Exported->setVisibleDespiteOwningModule();
4384 }
4385 break;
4386 }
4387
4388 case UPD_DECL_MARKED_OPENMP_DECLARETARGET:
4389 case UPD_ADDED_ATTR_TO_RECORD:
4390 AttrVec Attrs;
4391 Record.readAttributes(Attrs);
4392 assert(Attrs.size() == 1)(static_cast <bool> (Attrs.size() == 1) ? void (0) : __assert_fail
("Attrs.size() == 1", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/ASTReaderDecl.cpp"
, 4392, __extension__ __PRETTY_FUNCTION__))
;
4393 D->addAttr(Attrs[0]);
4394 break;
4395 }
4396 }
4397}

/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/Serialization/MultiOnDiskHashTable.h

1//===- MultiOnDiskHashTable.h - Merged set of hash tables -------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file provides a hash table data structure suitable for incremental and
11// distributed storage across a set of files.
12//
13// Multiple hash tables from different files are implicitly merged to improve
14// performance, and on reload the merged table will override those from other
15// files.
16//
17//===----------------------------------------------------------------------===//
18
19#ifndef LLVM_CLANG_LIB_SERIALIZATION_MULTIONDISKHASHTABLE_H
20#define LLVM_CLANG_LIB_SERIALIZATION_MULTIONDISKHASHTABLE_H
21
22#include "llvm/ADT/DenseMap.h"
23#include "llvm/ADT/DenseSet.h"
24#include "llvm/ADT/PointerUnion.h"
25#include "llvm/ADT/STLExtras.h"
26#include "llvm/ADT/SmallVector.h"
27#include "llvm/ADT/TinyPtrVector.h"
28#include "llvm/ADT/iterator_range.h"
29#include "llvm/Support/Endian.h"
30#include "llvm/Support/EndianStream.h"
31#include "llvm/Support/OnDiskHashTable.h"
32#include "llvm/Support/raw_ostream.h"
33#include <algorithm>
34#include <cstdint>
35#include <vector>
36
37namespace clang {
38namespace serialization {
39
40/// A collection of on-disk hash tables, merged when relevant for performance.
41template<typename Info> class MultiOnDiskHashTable {
42public:
43 /// A handle to a file, used when overriding tables.
44 using file_type = typename Info::file_type;
45
46 /// A pointer to an on-disk representation of the hash table.
47 using storage_type = const unsigned char *;
48
49 using external_key_type = typename Info::external_key_type;
50 using internal_key_type = typename Info::internal_key_type;
51 using data_type = typename Info::data_type;
52 using data_type_builder = typename Info::data_type_builder;
53 using hash_value_type = unsigned;
54
55private:
56 /// The generator is permitted to read our merged table.
57 template<typename ReaderInfo, typename WriterInfo>
58 friend class MultiOnDiskHashTableGenerator;
59
60 /// A hash table stored on disk.
61 struct OnDiskTable {
62 using HashTable = llvm::OnDiskIterableChainedHashTable<Info>;
63
64 file_type File;
65 HashTable Table;
66
67 OnDiskTable(file_type File, unsigned NumBuckets, unsigned NumEntries,
68 storage_type Buckets, storage_type Payload, storage_type Base,
69 const Info &InfoObj)
70 : File(File),
71 Table(NumBuckets, NumEntries, Buckets, Payload, Base, InfoObj) {}
72 };
73
74 struct MergedTable {
75 std::vector<file_type> Files;
76 llvm::DenseMap<internal_key_type, data_type> Data;
77 };
78
79 using Table = llvm::PointerUnion<OnDiskTable *, MergedTable *>;
80 using TableVector = llvm::TinyPtrVector<void *>;
81
82 /// The current set of on-disk and merged tables.
83 /// We manually store the opaque value of the Table because TinyPtrVector
84 /// can't cope with holding a PointerUnion directly.
85 /// There can be at most one MergedTable in this vector, and if present,
86 /// it is the first table.
87 TableVector Tables;
88
89 /// Files corresponding to overridden tables that we've not yet
90 /// discarded.
91 llvm::TinyPtrVector<file_type> PendingOverrides;
92
93 struct AsOnDiskTable {
94 using result_type = OnDiskTable *;
95
96 result_type operator()(void *P) const {
97 return Table::getFromOpaqueValue(P).template get<OnDiskTable *>();
98 }
99 };
100
101 using table_iterator =
102 llvm::mapped_iterator<TableVector::iterator, AsOnDiskTable>;
103 using table_range = llvm::iterator_range<table_iterator>;
104
105 /// The current set of on-disk tables.
106 table_range tables() {
107 auto Begin = Tables.begin(), End = Tables.end();
108 if (getMergedTable())
109 ++Begin;
110 return llvm::make_range(llvm::map_iterator(Begin, AsOnDiskTable()),
111 llvm::map_iterator(End, AsOnDiskTable()));
112 }
113
114 MergedTable *getMergedTable() const {
115 // If we already have a merged table, it's the first one.
116 return Tables.empty() ? nullptr : Table::getFromOpaqueValue(*Tables.begin())
117 .template dyn_cast<MergedTable*>();
118 }
119
120 /// Delete all our current on-disk tables.
121 void clear() {
122 for (auto *T : tables())
123 delete T;
124 if (auto *M = getMergedTable())
125 delete M;
126 Tables.clear();
127 }
128
129 void removeOverriddenTables() {
130 llvm::DenseSet<file_type> Files;
131 Files.insert(PendingOverrides.begin(), PendingOverrides.end());
132 // Explicitly capture Files to work around an MSVC 2015 rejects-valid bug.
133 auto ShouldRemove = [&Files](void *T) -> bool {
134 auto *ODT = Table::getFromOpaqueValue(T).template get<OnDiskTable *>();
135 bool Remove = Files.count(ODT->File);
136 if (Remove)
137 delete ODT;
138 return Remove;
139 };
140 Tables.erase(std::remove_if(tables().begin().getCurrent(), Tables.end(),
141 ShouldRemove),
142 Tables.end());
143 PendingOverrides.clear();
144 }
145
146 void condense() {
147 MergedTable *Merged = getMergedTable();
148 if (!Merged)
149 Merged = new MergedTable;
150
151 // Read in all the tables and merge them together.
152 // FIXME: Be smarter about which tables we merge.
153 for (auto *ODT : tables()) {
154 auto &HT = ODT->Table;
155 Info &InfoObj = HT.getInfoObj();
156
157 for (auto I = HT.data_begin(), E = HT.data_end(); I != E; ++I) {
158 auto *LocalPtr = I.getItem();
159
160 // FIXME: Don't rely on the OnDiskHashTable format here.
161 auto L = InfoObj.ReadKeyDataLength(LocalPtr);
162 const internal_key_type &Key = InfoObj.ReadKey(LocalPtr, L.first);
163 data_type_builder ValueBuilder(Merged->Data[Key]);
164 InfoObj.ReadDataInto(Key, LocalPtr + L.first, L.second,
165 ValueBuilder);
166 }
167
168 Merged->Files.push_back(ODT->File);
169 delete ODT;
170 }
171
172 Tables.clear();
173 Tables.push_back(Table(Merged).getOpaqueValue());
174 }
175
176public:
177 MultiOnDiskHashTable() = default;
178
179 MultiOnDiskHashTable(MultiOnDiskHashTable &&O)
180 : Tables(std::move(O.Tables)),
181 PendingOverrides(std::move(O.PendingOverrides)) {
182 O.Tables.clear();
183 }
184
185 MultiOnDiskHashTable &operator=(MultiOnDiskHashTable &&O) {
186 if (&O == this)
187 return *this;
188 clear();
189 Tables = std::move(O.Tables);
190 O.Tables.clear();
191 PendingOverrides = std::move(O.PendingOverrides);
192 return *this;
193 }
194
195 ~MultiOnDiskHashTable() { clear(); }
196
197 /// Add the table \p Data loaded from file \p File.
198 void add(file_type File, storage_type Data, Info InfoObj = Info()) {
199 using namespace llvm::support;
200
201 storage_type Ptr = Data;
202
203 uint32_t BucketOffset = endian::readNext<uint32_t, little, unaligned>(Ptr);
204
205 // Read the list of overridden files.
206 uint32_t NumFiles = endian::readNext<uint32_t, little, unaligned>(Ptr);
207 // FIXME: Add a reserve() to TinyPtrVector so that we don't need to make
208 // an additional copy.
209 llvm::SmallVector<file_type, 16> OverriddenFiles;
210 OverriddenFiles.reserve(NumFiles);
211 for (/**/; NumFiles != 0; --NumFiles)
10
Assuming 'NumFiles' is equal to 0
11
Loop condition is false. Execution continues on line 213
212 OverriddenFiles.push_back(InfoObj.ReadFileRef(Ptr));
213 PendingOverrides.insert(PendingOverrides.end(), OverriddenFiles.begin(),
214 OverriddenFiles.end());
215
216 // Read the OnDiskChainedHashTable header.
217 storage_type Buckets = Data + BucketOffset;
218 auto NumBucketsAndEntries =
219 OnDiskTable::HashTable::readNumBucketsAndEntries(Buckets);
220
221 // Register the table.
222 Table NewTable = new OnDiskTable(File, NumBucketsAndEntries.first,
12
Memory is allocated
13
Potential memory leak
223 NumBucketsAndEntries.second,
224 Buckets, Ptr, Data, std::move(InfoObj));
225 Tables.push_back(NewTable.getOpaqueValue());
226 }
227
228 /// Find and read the lookup results for \p EKey.
229 data_type find(const external_key_type &EKey) {
230 data_type Result;
231
232 if (!PendingOverrides.empty())
233 removeOverriddenTables();
234
235 if (Tables.size() > static_cast<unsigned>(Info::MaxTables))
236 condense();
237
238 internal_key_type Key = Info::GetInternalKey(EKey);
239 auto KeyHash = Info::ComputeHash(Key);
240
241 if (MergedTable *M = getMergedTable()) {
242 auto It = M->Data.find(Key);
243 if (It != M->Data.end())
244 Result = It->second;
245 }
246
247 data_type_builder ResultBuilder(Result);
248
249 for (auto *ODT : tables()) {
250 auto &HT = ODT->Table;
251 auto It = HT.find_hashed(Key, KeyHash);
252 if (It != HT.end())
253 HT.getInfoObj().ReadDataInto(Key, It.getDataPtr(), It.getDataLen(),
254 ResultBuilder);
255 }
256
257 return Result;
258 }
259
260 /// Read all the lookup results into a single value. This only makes
261 /// sense if merging values across keys is meaningful.
262 data_type findAll() {
263 data_type Result;
264 data_type_builder ResultBuilder(Result);
265
266 if (!PendingOverrides.empty())
267 removeOverriddenTables();
268
269 if (MergedTable *M = getMergedTable()) {
270 for (auto &KV : M->Data)
271 Info::MergeDataInto(KV.second, ResultBuilder);
272 }
273
274 for (auto *ODT : tables()) {
275 auto &HT = ODT->Table;
276 Info &InfoObj = HT.getInfoObj();
277 for (auto I = HT.data_begin(), E = HT.data_end(); I != E; ++I) {
278 auto *LocalPtr = I.getItem();
279
280 // FIXME: Don't rely on the OnDiskHashTable format here.
281 auto L = InfoObj.ReadKeyDataLength(LocalPtr);
282 const internal_key_type &Key = InfoObj.ReadKey(LocalPtr, L.first);
283 InfoObj.ReadDataInto(Key, LocalPtr + L.first, L.second, ResultBuilder);
284 }
285 }
286
287 return Result;
288 }
289};
290
291/// Writer for the on-disk hash table.
292template<typename ReaderInfo, typename WriterInfo>
293class MultiOnDiskHashTableGenerator {
294 using BaseTable = MultiOnDiskHashTable<ReaderInfo>;
295 using Generator = llvm::OnDiskChainedHashTableGenerator<WriterInfo>;
296
297 Generator Gen;
298
299public:
300 MultiOnDiskHashTableGenerator() : Gen() {}
301
302 void insert(typename WriterInfo::key_type_ref Key,
303 typename WriterInfo::data_type_ref Data, WriterInfo &Info) {
304 Gen.insert(Key, Data, Info);
305 }
306
307 void emit(llvm::SmallVectorImpl<char> &Out, WriterInfo &Info,
308 const BaseTable *Base) {
309 using namespace llvm::support;
310
311 llvm::raw_svector_ostream OutStream(Out);
312
313 // Write our header information.
314 {
315 endian::Writer Writer(OutStream, little);
316
317 // Reserve four bytes for the bucket offset.
318 Writer.write<uint32_t>(0);
319
320 if (auto *Merged = Base ? Base->getMergedTable() : nullptr) {
321 // Write list of overridden files.
322 Writer.write<uint32_t>(Merged->Files.size());
323 for (const auto &F : Merged->Files)
324 Info.EmitFileRef(OutStream, F);
325
326 // Add all merged entries from Base to the generator.
327 for (auto &KV : Merged->Data) {
328 if (!Gen.contains(KV.first, Info))
329 Gen.insert(KV.first, Info.ImportData(KV.second), Info);
330 }
331 } else {
332 Writer.write<uint32_t>(0);
333 }
334 }
335
336 // Write the table itself.
337 uint32_t BucketOffset = Gen.Emit(OutStream, Info);
338
339 // Replace the first four bytes with the bucket offset.
340 endian::write32le(Out.data(), BucketOffset);
341 }
342};
343
344} // namespace serialization
345} // namespace clang
346
347#endif // LLVM_CLANG_LIB_SERIALIZATION_MULTIONDISKHASHTABLE_H