File: | clang/lib/Sema/SemaDecl.cpp |
Warning: | line 10753, column 48 Called C++ object pointer is null |
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1 | //===--- SemaDecl.cpp - Semantic Analysis for Declarations ----------------===// | ||||||
2 | // | ||||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||
6 | // | ||||||
7 | //===----------------------------------------------------------------------===// | ||||||
8 | // | ||||||
9 | // This file implements semantic analysis for declarations. | ||||||
10 | // | ||||||
11 | //===----------------------------------------------------------------------===// | ||||||
12 | |||||||
13 | #include "TypeLocBuilder.h" | ||||||
14 | #include "clang/AST/ASTConsumer.h" | ||||||
15 | #include "clang/AST/ASTContext.h" | ||||||
16 | #include "clang/AST/ASTLambda.h" | ||||||
17 | #include "clang/AST/CXXInheritance.h" | ||||||
18 | #include "clang/AST/CharUnits.h" | ||||||
19 | #include "clang/AST/CommentDiagnostic.h" | ||||||
20 | #include "clang/AST/DeclCXX.h" | ||||||
21 | #include "clang/AST/DeclObjC.h" | ||||||
22 | #include "clang/AST/DeclTemplate.h" | ||||||
23 | #include "clang/AST/EvaluatedExprVisitor.h" | ||||||
24 | #include "clang/AST/Expr.h" | ||||||
25 | #include "clang/AST/ExprCXX.h" | ||||||
26 | #include "clang/AST/NonTrivialTypeVisitor.h" | ||||||
27 | #include "clang/AST/StmtCXX.h" | ||||||
28 | #include "clang/Basic/Builtins.h" | ||||||
29 | #include "clang/Basic/PartialDiagnostic.h" | ||||||
30 | #include "clang/Basic/SourceManager.h" | ||||||
31 | #include "clang/Basic/TargetInfo.h" | ||||||
32 | #include "clang/Lex/HeaderSearch.h" // TODO: Sema shouldn't depend on Lex | ||||||
33 | #include "clang/Lex/Lexer.h" // TODO: Extract static functions to fix layering. | ||||||
34 | #include "clang/Lex/ModuleLoader.h" // TODO: Sema shouldn't depend on Lex | ||||||
35 | #include "clang/Lex/Preprocessor.h" // Included for isCodeCompletionEnabled() | ||||||
36 | #include "clang/Sema/CXXFieldCollector.h" | ||||||
37 | #include "clang/Sema/DeclSpec.h" | ||||||
38 | #include "clang/Sema/DelayedDiagnostic.h" | ||||||
39 | #include "clang/Sema/Initialization.h" | ||||||
40 | #include "clang/Sema/Lookup.h" | ||||||
41 | #include "clang/Sema/ParsedTemplate.h" | ||||||
42 | #include "clang/Sema/Scope.h" | ||||||
43 | #include "clang/Sema/ScopeInfo.h" | ||||||
44 | #include "clang/Sema/SemaInternal.h" | ||||||
45 | #include "clang/Sema/Template.h" | ||||||
46 | #include "llvm/ADT/SmallString.h" | ||||||
47 | #include "llvm/ADT/Triple.h" | ||||||
48 | #include <algorithm> | ||||||
49 | #include <cstring> | ||||||
50 | #include <functional> | ||||||
51 | #include <unordered_map> | ||||||
52 | |||||||
53 | using namespace clang; | ||||||
54 | using namespace sema; | ||||||
55 | |||||||
56 | Sema::DeclGroupPtrTy Sema::ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType) { | ||||||
57 | if (OwnedType) { | ||||||
58 | Decl *Group[2] = { OwnedType, Ptr }; | ||||||
59 | return DeclGroupPtrTy::make(DeclGroupRef::Create(Context, Group, 2)); | ||||||
60 | } | ||||||
61 | |||||||
62 | return DeclGroupPtrTy::make(DeclGroupRef(Ptr)); | ||||||
63 | } | ||||||
64 | |||||||
65 | namespace { | ||||||
66 | |||||||
67 | class TypeNameValidatorCCC final : public CorrectionCandidateCallback { | ||||||
68 | public: | ||||||
69 | TypeNameValidatorCCC(bool AllowInvalid, bool WantClass = false, | ||||||
70 | bool AllowTemplates = false, | ||||||
71 | bool AllowNonTemplates = true) | ||||||
72 | : AllowInvalidDecl(AllowInvalid), WantClassName(WantClass), | ||||||
73 | AllowTemplates(AllowTemplates), AllowNonTemplates(AllowNonTemplates) { | ||||||
74 | WantExpressionKeywords = false; | ||||||
75 | WantCXXNamedCasts = false; | ||||||
76 | WantRemainingKeywords = false; | ||||||
77 | } | ||||||
78 | |||||||
79 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||
80 | if (NamedDecl *ND = candidate.getCorrectionDecl()) { | ||||||
81 | if (!AllowInvalidDecl && ND->isInvalidDecl()) | ||||||
82 | return false; | ||||||
83 | |||||||
84 | if (getAsTypeTemplateDecl(ND)) | ||||||
85 | return AllowTemplates; | ||||||
86 | |||||||
87 | bool IsType = isa<TypeDecl>(ND) || isa<ObjCInterfaceDecl>(ND); | ||||||
88 | if (!IsType) | ||||||
89 | return false; | ||||||
90 | |||||||
91 | if (AllowNonTemplates) | ||||||
92 | return true; | ||||||
93 | |||||||
94 | // An injected-class-name of a class template (specialization) is valid | ||||||
95 | // as a template or as a non-template. | ||||||
96 | if (AllowTemplates) { | ||||||
97 | auto *RD = dyn_cast<CXXRecordDecl>(ND); | ||||||
98 | if (!RD || !RD->isInjectedClassName()) | ||||||
99 | return false; | ||||||
100 | RD = cast<CXXRecordDecl>(RD->getDeclContext()); | ||||||
101 | return RD->getDescribedClassTemplate() || | ||||||
102 | isa<ClassTemplateSpecializationDecl>(RD); | ||||||
103 | } | ||||||
104 | |||||||
105 | return false; | ||||||
106 | } | ||||||
107 | |||||||
108 | return !WantClassName && candidate.isKeyword(); | ||||||
109 | } | ||||||
110 | |||||||
111 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
112 | return std::make_unique<TypeNameValidatorCCC>(*this); | ||||||
113 | } | ||||||
114 | |||||||
115 | private: | ||||||
116 | bool AllowInvalidDecl; | ||||||
117 | bool WantClassName; | ||||||
118 | bool AllowTemplates; | ||||||
119 | bool AllowNonTemplates; | ||||||
120 | }; | ||||||
121 | |||||||
122 | } // end anonymous namespace | ||||||
123 | |||||||
124 | /// Determine whether the token kind starts a simple-type-specifier. | ||||||
125 | bool Sema::isSimpleTypeSpecifier(tok::TokenKind Kind) const { | ||||||
126 | switch (Kind) { | ||||||
127 | // FIXME: Take into account the current language when deciding whether a | ||||||
128 | // token kind is a valid type specifier | ||||||
129 | case tok::kw_short: | ||||||
130 | case tok::kw_long: | ||||||
131 | case tok::kw___int64: | ||||||
132 | case tok::kw___int128: | ||||||
133 | case tok::kw_signed: | ||||||
134 | case tok::kw_unsigned: | ||||||
135 | case tok::kw_void: | ||||||
136 | case tok::kw_char: | ||||||
137 | case tok::kw_int: | ||||||
138 | case tok::kw_half: | ||||||
139 | case tok::kw_float: | ||||||
140 | case tok::kw_double: | ||||||
141 | case tok::kw___bf16: | ||||||
142 | case tok::kw__Float16: | ||||||
143 | case tok::kw___float128: | ||||||
144 | case tok::kw___ibm128: | ||||||
145 | case tok::kw_wchar_t: | ||||||
146 | case tok::kw_bool: | ||||||
147 | case tok::kw___underlying_type: | ||||||
148 | case tok::kw___auto_type: | ||||||
149 | return true; | ||||||
150 | |||||||
151 | case tok::annot_typename: | ||||||
152 | case tok::kw_char16_t: | ||||||
153 | case tok::kw_char32_t: | ||||||
154 | case tok::kw_typeof: | ||||||
155 | case tok::annot_decltype: | ||||||
156 | case tok::kw_decltype: | ||||||
157 | return getLangOpts().CPlusPlus; | ||||||
158 | |||||||
159 | case tok::kw_char8_t: | ||||||
160 | return getLangOpts().Char8; | ||||||
161 | |||||||
162 | default: | ||||||
163 | break; | ||||||
164 | } | ||||||
165 | |||||||
166 | return false; | ||||||
167 | } | ||||||
168 | |||||||
169 | namespace { | ||||||
170 | enum class UnqualifiedTypeNameLookupResult { | ||||||
171 | NotFound, | ||||||
172 | FoundNonType, | ||||||
173 | FoundType | ||||||
174 | }; | ||||||
175 | } // end anonymous namespace | ||||||
176 | |||||||
177 | /// Tries to perform unqualified lookup of the type decls in bases for | ||||||
178 | /// dependent class. | ||||||
179 | /// \return \a NotFound if no any decls is found, \a FoundNotType if found not a | ||||||
180 | /// type decl, \a FoundType if only type decls are found. | ||||||
181 | static UnqualifiedTypeNameLookupResult | ||||||
182 | lookupUnqualifiedTypeNameInBase(Sema &S, const IdentifierInfo &II, | ||||||
183 | SourceLocation NameLoc, | ||||||
184 | const CXXRecordDecl *RD) { | ||||||
185 | if (!RD->hasDefinition()) | ||||||
186 | return UnqualifiedTypeNameLookupResult::NotFound; | ||||||
187 | // Look for type decls in base classes. | ||||||
188 | UnqualifiedTypeNameLookupResult FoundTypeDecl = | ||||||
189 | UnqualifiedTypeNameLookupResult::NotFound; | ||||||
190 | for (const auto &Base : RD->bases()) { | ||||||
191 | const CXXRecordDecl *BaseRD = nullptr; | ||||||
192 | if (auto *BaseTT = Base.getType()->getAs<TagType>()) | ||||||
193 | BaseRD = BaseTT->getAsCXXRecordDecl(); | ||||||
194 | else if (auto *TST = Base.getType()->getAs<TemplateSpecializationType>()) { | ||||||
195 | // Look for type decls in dependent base classes that have known primary | ||||||
196 | // templates. | ||||||
197 | if (!TST || !TST->isDependentType()) | ||||||
198 | continue; | ||||||
199 | auto *TD = TST->getTemplateName().getAsTemplateDecl(); | ||||||
200 | if (!TD) | ||||||
201 | continue; | ||||||
202 | if (auto *BasePrimaryTemplate = | ||||||
203 | dyn_cast_or_null<CXXRecordDecl>(TD->getTemplatedDecl())) { | ||||||
204 | if (BasePrimaryTemplate->getCanonicalDecl() != RD->getCanonicalDecl()) | ||||||
205 | BaseRD = BasePrimaryTemplate; | ||||||
206 | else if (auto *CTD = dyn_cast<ClassTemplateDecl>(TD)) { | ||||||
207 | if (const ClassTemplatePartialSpecializationDecl *PS = | ||||||
208 | CTD->findPartialSpecialization(Base.getType())) | ||||||
209 | if (PS->getCanonicalDecl() != RD->getCanonicalDecl()) | ||||||
210 | BaseRD = PS; | ||||||
211 | } | ||||||
212 | } | ||||||
213 | } | ||||||
214 | if (BaseRD) { | ||||||
215 | for (NamedDecl *ND : BaseRD->lookup(&II)) { | ||||||
216 | if (!isa<TypeDecl>(ND)) | ||||||
217 | return UnqualifiedTypeNameLookupResult::FoundNonType; | ||||||
218 | FoundTypeDecl = UnqualifiedTypeNameLookupResult::FoundType; | ||||||
219 | } | ||||||
220 | if (FoundTypeDecl == UnqualifiedTypeNameLookupResult::NotFound) { | ||||||
221 | switch (lookupUnqualifiedTypeNameInBase(S, II, NameLoc, BaseRD)) { | ||||||
222 | case UnqualifiedTypeNameLookupResult::FoundNonType: | ||||||
223 | return UnqualifiedTypeNameLookupResult::FoundNonType; | ||||||
224 | case UnqualifiedTypeNameLookupResult::FoundType: | ||||||
225 | FoundTypeDecl = UnqualifiedTypeNameLookupResult::FoundType; | ||||||
226 | break; | ||||||
227 | case UnqualifiedTypeNameLookupResult::NotFound: | ||||||
228 | break; | ||||||
229 | } | ||||||
230 | } | ||||||
231 | } | ||||||
232 | } | ||||||
233 | |||||||
234 | return FoundTypeDecl; | ||||||
235 | } | ||||||
236 | |||||||
237 | static ParsedType recoverFromTypeInKnownDependentBase(Sema &S, | ||||||
238 | const IdentifierInfo &II, | ||||||
239 | SourceLocation NameLoc) { | ||||||
240 | // Lookup in the parent class template context, if any. | ||||||
241 | const CXXRecordDecl *RD = nullptr; | ||||||
242 | UnqualifiedTypeNameLookupResult FoundTypeDecl = | ||||||
243 | UnqualifiedTypeNameLookupResult::NotFound; | ||||||
244 | for (DeclContext *DC = S.CurContext; | ||||||
245 | DC && FoundTypeDecl == UnqualifiedTypeNameLookupResult::NotFound; | ||||||
246 | DC = DC->getParent()) { | ||||||
247 | // Look for type decls in dependent base classes that have known primary | ||||||
248 | // templates. | ||||||
249 | RD = dyn_cast<CXXRecordDecl>(DC); | ||||||
250 | if (RD && RD->getDescribedClassTemplate()) | ||||||
251 | FoundTypeDecl = lookupUnqualifiedTypeNameInBase(S, II, NameLoc, RD); | ||||||
252 | } | ||||||
253 | if (FoundTypeDecl != UnqualifiedTypeNameLookupResult::FoundType) | ||||||
254 | return nullptr; | ||||||
255 | |||||||
256 | // We found some types in dependent base classes. Recover as if the user | ||||||
257 | // wrote 'typename MyClass::II' instead of 'II'. We'll fully resolve the | ||||||
258 | // lookup during template instantiation. | ||||||
259 | S.Diag(NameLoc, diag::ext_found_in_dependent_base) << &II; | ||||||
260 | |||||||
261 | ASTContext &Context = S.Context; | ||||||
262 | auto *NNS = NestedNameSpecifier::Create(Context, nullptr, false, | ||||||
263 | cast<Type>(Context.getRecordType(RD))); | ||||||
264 | QualType T = Context.getDependentNameType(ETK_Typename, NNS, &II); | ||||||
265 | |||||||
266 | CXXScopeSpec SS; | ||||||
267 | SS.MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
268 | |||||||
269 | TypeLocBuilder Builder; | ||||||
270 | DependentNameTypeLoc DepTL = Builder.push<DependentNameTypeLoc>(T); | ||||||
271 | DepTL.setNameLoc(NameLoc); | ||||||
272 | DepTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
273 | DepTL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||
274 | return S.CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
275 | } | ||||||
276 | |||||||
277 | /// If the identifier refers to a type name within this scope, | ||||||
278 | /// return the declaration of that type. | ||||||
279 | /// | ||||||
280 | /// This routine performs ordinary name lookup of the identifier II | ||||||
281 | /// within the given scope, with optional C++ scope specifier SS, to | ||||||
282 | /// determine whether the name refers to a type. If so, returns an | ||||||
283 | /// opaque pointer (actually a QualType) corresponding to that | ||||||
284 | /// type. Otherwise, returns NULL. | ||||||
285 | ParsedType Sema::getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, | ||||||
286 | Scope *S, CXXScopeSpec *SS, | ||||||
287 | bool isClassName, bool HasTrailingDot, | ||||||
288 | ParsedType ObjectTypePtr, | ||||||
289 | bool IsCtorOrDtorName, | ||||||
290 | bool WantNontrivialTypeSourceInfo, | ||||||
291 | bool IsClassTemplateDeductionContext, | ||||||
292 | IdentifierInfo **CorrectedII) { | ||||||
293 | // FIXME: Consider allowing this outside C++1z mode as an extension. | ||||||
294 | bool AllowDeducedTemplate = IsClassTemplateDeductionContext && | ||||||
295 | getLangOpts().CPlusPlus17 && !IsCtorOrDtorName && | ||||||
296 | !isClassName && !HasTrailingDot; | ||||||
297 | |||||||
298 | // Determine where we will perform name lookup. | ||||||
299 | DeclContext *LookupCtx = nullptr; | ||||||
300 | if (ObjectTypePtr) { | ||||||
301 | QualType ObjectType = ObjectTypePtr.get(); | ||||||
302 | if (ObjectType->isRecordType()) | ||||||
303 | LookupCtx = computeDeclContext(ObjectType); | ||||||
304 | } else if (SS && SS->isNotEmpty()) { | ||||||
305 | LookupCtx = computeDeclContext(*SS, false); | ||||||
306 | |||||||
307 | if (!LookupCtx) { | ||||||
308 | if (isDependentScopeSpecifier(*SS)) { | ||||||
309 | // C++ [temp.res]p3: | ||||||
310 | // A qualified-id that refers to a type and in which the | ||||||
311 | // nested-name-specifier depends on a template-parameter (14.6.2) | ||||||
312 | // shall be prefixed by the keyword typename to indicate that the | ||||||
313 | // qualified-id denotes a type, forming an | ||||||
314 | // elaborated-type-specifier (7.1.5.3). | ||||||
315 | // | ||||||
316 | // We therefore do not perform any name lookup if the result would | ||||||
317 | // refer to a member of an unknown specialization. | ||||||
318 | if (!isClassName && !IsCtorOrDtorName) | ||||||
319 | return nullptr; | ||||||
320 | |||||||
321 | // We know from the grammar that this name refers to a type, | ||||||
322 | // so build a dependent node to describe the type. | ||||||
323 | if (WantNontrivialTypeSourceInfo) | ||||||
324 | return ActOnTypenameType(S, SourceLocation(), *SS, II, NameLoc).get(); | ||||||
325 | |||||||
326 | NestedNameSpecifierLoc QualifierLoc = SS->getWithLocInContext(Context); | ||||||
327 | QualType T = CheckTypenameType(ETK_None, SourceLocation(), QualifierLoc, | ||||||
328 | II, NameLoc); | ||||||
329 | return ParsedType::make(T); | ||||||
330 | } | ||||||
331 | |||||||
332 | return nullptr; | ||||||
333 | } | ||||||
334 | |||||||
335 | if (!LookupCtx->isDependentContext() && | ||||||
336 | RequireCompleteDeclContext(*SS, LookupCtx)) | ||||||
337 | return nullptr; | ||||||
338 | } | ||||||
339 | |||||||
340 | // FIXME: LookupNestedNameSpecifierName isn't the right kind of | ||||||
341 | // lookup for class-names. | ||||||
342 | LookupNameKind Kind = isClassName ? LookupNestedNameSpecifierName : | ||||||
343 | LookupOrdinaryName; | ||||||
344 | LookupResult Result(*this, &II, NameLoc, Kind); | ||||||
345 | if (LookupCtx) { | ||||||
346 | // Perform "qualified" name lookup into the declaration context we | ||||||
347 | // computed, which is either the type of the base of a member access | ||||||
348 | // expression or the declaration context associated with a prior | ||||||
349 | // nested-name-specifier. | ||||||
350 | LookupQualifiedName(Result, LookupCtx); | ||||||
351 | |||||||
352 | if (ObjectTypePtr && Result.empty()) { | ||||||
353 | // C++ [basic.lookup.classref]p3: | ||||||
354 | // If the unqualified-id is ~type-name, the type-name is looked up | ||||||
355 | // in the context of the entire postfix-expression. If the type T of | ||||||
356 | // the object expression is of a class type C, the type-name is also | ||||||
357 | // looked up in the scope of class C. At least one of the lookups shall | ||||||
358 | // find a name that refers to (possibly cv-qualified) T. | ||||||
359 | LookupName(Result, S); | ||||||
360 | } | ||||||
361 | } else { | ||||||
362 | // Perform unqualified name lookup. | ||||||
363 | LookupName(Result, S); | ||||||
364 | |||||||
365 | // For unqualified lookup in a class template in MSVC mode, look into | ||||||
366 | // dependent base classes where the primary class template is known. | ||||||
367 | if (Result.empty() && getLangOpts().MSVCCompat && (!SS || SS->isEmpty())) { | ||||||
368 | if (ParsedType TypeInBase = | ||||||
369 | recoverFromTypeInKnownDependentBase(*this, II, NameLoc)) | ||||||
370 | return TypeInBase; | ||||||
371 | } | ||||||
372 | } | ||||||
373 | |||||||
374 | NamedDecl *IIDecl = nullptr; | ||||||
375 | switch (Result.getResultKind()) { | ||||||
376 | case LookupResult::NotFound: | ||||||
377 | case LookupResult::NotFoundInCurrentInstantiation: | ||||||
378 | if (CorrectedII) { | ||||||
379 | TypeNameValidatorCCC CCC(/*AllowInvalid=*/true, isClassName, | ||||||
380 | AllowDeducedTemplate); | ||||||
381 | TypoCorrection Correction = CorrectTypo(Result.getLookupNameInfo(), Kind, | ||||||
382 | S, SS, CCC, CTK_ErrorRecovery); | ||||||
383 | IdentifierInfo *NewII = Correction.getCorrectionAsIdentifierInfo(); | ||||||
384 | TemplateTy Template; | ||||||
385 | bool MemberOfUnknownSpecialization; | ||||||
386 | UnqualifiedId TemplateName; | ||||||
387 | TemplateName.setIdentifier(NewII, NameLoc); | ||||||
388 | NestedNameSpecifier *NNS = Correction.getCorrectionSpecifier(); | ||||||
389 | CXXScopeSpec NewSS, *NewSSPtr = SS; | ||||||
390 | if (SS && NNS) { | ||||||
391 | NewSS.MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
392 | NewSSPtr = &NewSS; | ||||||
393 | } | ||||||
394 | if (Correction && (NNS || NewII != &II) && | ||||||
395 | // Ignore a correction to a template type as the to-be-corrected | ||||||
396 | // identifier is not a template (typo correction for template names | ||||||
397 | // is handled elsewhere). | ||||||
398 | !(getLangOpts().CPlusPlus && NewSSPtr && | ||||||
399 | isTemplateName(S, *NewSSPtr, false, TemplateName, nullptr, false, | ||||||
400 | Template, MemberOfUnknownSpecialization))) { | ||||||
401 | ParsedType Ty = getTypeName(*NewII, NameLoc, S, NewSSPtr, | ||||||
402 | isClassName, HasTrailingDot, ObjectTypePtr, | ||||||
403 | IsCtorOrDtorName, | ||||||
404 | WantNontrivialTypeSourceInfo, | ||||||
405 | IsClassTemplateDeductionContext); | ||||||
406 | if (Ty) { | ||||||
407 | diagnoseTypo(Correction, | ||||||
408 | PDiag(diag::err_unknown_type_or_class_name_suggest) | ||||||
409 | << Result.getLookupName() << isClassName); | ||||||
410 | if (SS && NNS) | ||||||
411 | SS->MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
412 | *CorrectedII = NewII; | ||||||
413 | return Ty; | ||||||
414 | } | ||||||
415 | } | ||||||
416 | } | ||||||
417 | // If typo correction failed or was not performed, fall through | ||||||
418 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
419 | case LookupResult::FoundOverloaded: | ||||||
420 | case LookupResult::FoundUnresolvedValue: | ||||||
421 | Result.suppressDiagnostics(); | ||||||
422 | return nullptr; | ||||||
423 | |||||||
424 | case LookupResult::Ambiguous: | ||||||
425 | // Recover from type-hiding ambiguities by hiding the type. We'll | ||||||
426 | // do the lookup again when looking for an object, and we can | ||||||
427 | // diagnose the error then. If we don't do this, then the error | ||||||
428 | // about hiding the type will be immediately followed by an error | ||||||
429 | // that only makes sense if the identifier was treated like a type. | ||||||
430 | if (Result.getAmbiguityKind() == LookupResult::AmbiguousTagHiding) { | ||||||
431 | Result.suppressDiagnostics(); | ||||||
432 | return nullptr; | ||||||
433 | } | ||||||
434 | |||||||
435 | // Look to see if we have a type anywhere in the list of results. | ||||||
436 | for (LookupResult::iterator Res = Result.begin(), ResEnd = Result.end(); | ||||||
437 | Res != ResEnd; ++Res) { | ||||||
438 | NamedDecl *RealRes = (*Res)->getUnderlyingDecl(); | ||||||
439 | if (isa<TypeDecl, ObjCInterfaceDecl, UnresolvedUsingIfExistsDecl>( | ||||||
440 | RealRes) || | ||||||
441 | (AllowDeducedTemplate && getAsTypeTemplateDecl(RealRes))) { | ||||||
442 | if (!IIDecl || | ||||||
443 | // Make the selection of the recovery decl deterministic. | ||||||
444 | RealRes->getLocation() < IIDecl->getLocation()) | ||||||
445 | IIDecl = RealRes; | ||||||
446 | } | ||||||
447 | } | ||||||
448 | |||||||
449 | if (!IIDecl) { | ||||||
450 | // None of the entities we found is a type, so there is no way | ||||||
451 | // to even assume that the result is a type. In this case, don't | ||||||
452 | // complain about the ambiguity. The parser will either try to | ||||||
453 | // perform this lookup again (e.g., as an object name), which | ||||||
454 | // will produce the ambiguity, or will complain that it expected | ||||||
455 | // a type name. | ||||||
456 | Result.suppressDiagnostics(); | ||||||
457 | return nullptr; | ||||||
458 | } | ||||||
459 | |||||||
460 | // We found a type within the ambiguous lookup; diagnose the | ||||||
461 | // ambiguity and then return that type. This might be the right | ||||||
462 | // answer, or it might not be, but it suppresses any attempt to | ||||||
463 | // perform the name lookup again. | ||||||
464 | break; | ||||||
465 | |||||||
466 | case LookupResult::Found: | ||||||
467 | IIDecl = Result.getFoundDecl(); | ||||||
468 | break; | ||||||
469 | } | ||||||
470 | |||||||
471 | assert(IIDecl && "Didn't find decl")(static_cast <bool> (IIDecl && "Didn't find decl" ) ? void (0) : __assert_fail ("IIDecl && \"Didn't find decl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 471, __extension__ __PRETTY_FUNCTION__)); | ||||||
472 | |||||||
473 | QualType T; | ||||||
474 | if (TypeDecl *TD = dyn_cast<TypeDecl>(IIDecl)) { | ||||||
475 | // C++ [class.qual]p2: A lookup that would find the injected-class-name | ||||||
476 | // instead names the constructors of the class, except when naming a class. | ||||||
477 | // This is ill-formed when we're not actually forming a ctor or dtor name. | ||||||
478 | auto *LookupRD = dyn_cast_or_null<CXXRecordDecl>(LookupCtx); | ||||||
479 | auto *FoundRD = dyn_cast<CXXRecordDecl>(TD); | ||||||
480 | if (!isClassName && !IsCtorOrDtorName && LookupRD && FoundRD && | ||||||
481 | FoundRD->isInjectedClassName() && | ||||||
482 | declaresSameEntity(LookupRD, cast<Decl>(FoundRD->getParent()))) | ||||||
483 | Diag(NameLoc, diag::err_out_of_line_qualified_id_type_names_constructor) | ||||||
484 | << &II << /*Type*/1; | ||||||
485 | |||||||
486 | DiagnoseUseOfDecl(IIDecl, NameLoc); | ||||||
487 | |||||||
488 | T = Context.getTypeDeclType(TD); | ||||||
489 | MarkAnyDeclReferenced(TD->getLocation(), TD, /*OdrUse=*/false); | ||||||
490 | } else if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(IIDecl)) { | ||||||
491 | (void)DiagnoseUseOfDecl(IDecl, NameLoc); | ||||||
492 | if (!HasTrailingDot) | ||||||
493 | T = Context.getObjCInterfaceType(IDecl); | ||||||
494 | } else if (auto *UD = dyn_cast<UnresolvedUsingIfExistsDecl>(IIDecl)) { | ||||||
495 | (void)DiagnoseUseOfDecl(UD, NameLoc); | ||||||
496 | // Recover with 'int' | ||||||
497 | T = Context.IntTy; | ||||||
498 | } else if (AllowDeducedTemplate) { | ||||||
499 | if (auto *TD = getAsTypeTemplateDecl(IIDecl)) | ||||||
500 | T = Context.getDeducedTemplateSpecializationType(TemplateName(TD), | ||||||
501 | QualType(), false); | ||||||
502 | } | ||||||
503 | |||||||
504 | if (T.isNull()) { | ||||||
505 | // If it's not plausibly a type, suppress diagnostics. | ||||||
506 | Result.suppressDiagnostics(); | ||||||
507 | return nullptr; | ||||||
508 | } | ||||||
509 | |||||||
510 | // NOTE: avoid constructing an ElaboratedType(Loc) if this is a | ||||||
511 | // constructor or destructor name (in such a case, the scope specifier | ||||||
512 | // will be attached to the enclosing Expr or Decl node). | ||||||
513 | if (SS && SS->isNotEmpty() && !IsCtorOrDtorName && | ||||||
514 | !isa<ObjCInterfaceDecl, UnresolvedUsingIfExistsDecl>(IIDecl)) { | ||||||
515 | if (WantNontrivialTypeSourceInfo) { | ||||||
516 | // Construct a type with type-source information. | ||||||
517 | TypeLocBuilder Builder; | ||||||
518 | Builder.pushTypeSpec(T).setNameLoc(NameLoc); | ||||||
519 | |||||||
520 | T = getElaboratedType(ETK_None, *SS, T); | ||||||
521 | ElaboratedTypeLoc ElabTL = Builder.push<ElaboratedTypeLoc>(T); | ||||||
522 | ElabTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
523 | ElabTL.setQualifierLoc(SS->getWithLocInContext(Context)); | ||||||
524 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
525 | } else { | ||||||
526 | T = getElaboratedType(ETK_None, *SS, T); | ||||||
527 | } | ||||||
528 | } | ||||||
529 | |||||||
530 | return ParsedType::make(T); | ||||||
531 | } | ||||||
532 | |||||||
533 | // Builds a fake NNS for the given decl context. | ||||||
534 | static NestedNameSpecifier * | ||||||
535 | synthesizeCurrentNestedNameSpecifier(ASTContext &Context, DeclContext *DC) { | ||||||
536 | for (;; DC = DC->getLookupParent()) { | ||||||
537 | DC = DC->getPrimaryContext(); | ||||||
538 | auto *ND = dyn_cast<NamespaceDecl>(DC); | ||||||
539 | if (ND && !ND->isInline() && !ND->isAnonymousNamespace()) | ||||||
540 | return NestedNameSpecifier::Create(Context, nullptr, ND); | ||||||
541 | else if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) | ||||||
542 | return NestedNameSpecifier::Create(Context, nullptr, RD->isTemplateDecl(), | ||||||
543 | RD->getTypeForDecl()); | ||||||
544 | else if (isa<TranslationUnitDecl>(DC)) | ||||||
545 | return NestedNameSpecifier::GlobalSpecifier(Context); | ||||||
546 | } | ||||||
547 | llvm_unreachable("something isn't in TU scope?")::llvm::llvm_unreachable_internal("something isn't in TU scope?" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 547); | ||||||
548 | } | ||||||
549 | |||||||
550 | /// Find the parent class with dependent bases of the innermost enclosing method | ||||||
551 | /// context. Do not look for enclosing CXXRecordDecls directly, or we will end | ||||||
552 | /// up allowing unqualified dependent type names at class-level, which MSVC | ||||||
553 | /// correctly rejects. | ||||||
554 | static const CXXRecordDecl * | ||||||
555 | findRecordWithDependentBasesOfEnclosingMethod(const DeclContext *DC) { | ||||||
556 | for (; DC && DC->isDependentContext(); DC = DC->getLookupParent()) { | ||||||
557 | DC = DC->getPrimaryContext(); | ||||||
558 | if (const auto *MD = dyn_cast<CXXMethodDecl>(DC)) | ||||||
559 | if (MD->getParent()->hasAnyDependentBases()) | ||||||
560 | return MD->getParent(); | ||||||
561 | } | ||||||
562 | return nullptr; | ||||||
563 | } | ||||||
564 | |||||||
565 | ParsedType Sema::ActOnMSVCUnknownTypeName(const IdentifierInfo &II, | ||||||
566 | SourceLocation NameLoc, | ||||||
567 | bool IsTemplateTypeArg) { | ||||||
568 | assert(getLangOpts().MSVCCompat && "shouldn't be called in non-MSVC mode")(static_cast <bool> (getLangOpts().MSVCCompat && "shouldn't be called in non-MSVC mode") ? void (0) : __assert_fail ("getLangOpts().MSVCCompat && \"shouldn't be called in non-MSVC mode\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 568, __extension__ __PRETTY_FUNCTION__)); | ||||||
569 | |||||||
570 | NestedNameSpecifier *NNS = nullptr; | ||||||
571 | if (IsTemplateTypeArg && getCurScope()->isTemplateParamScope()) { | ||||||
572 | // If we weren't able to parse a default template argument, delay lookup | ||||||
573 | // until instantiation time by making a non-dependent DependentTypeName. We | ||||||
574 | // pretend we saw a NestedNameSpecifier referring to the current scope, and | ||||||
575 | // lookup is retried. | ||||||
576 | // FIXME: This hurts our diagnostic quality, since we get errors like "no | ||||||
577 | // type named 'Foo' in 'current_namespace'" when the user didn't write any | ||||||
578 | // name specifiers. | ||||||
579 | NNS = synthesizeCurrentNestedNameSpecifier(Context, CurContext); | ||||||
580 | Diag(NameLoc, diag::ext_ms_delayed_template_argument) << &II; | ||||||
581 | } else if (const CXXRecordDecl *RD = | ||||||
582 | findRecordWithDependentBasesOfEnclosingMethod(CurContext)) { | ||||||
583 | // Build a DependentNameType that will perform lookup into RD at | ||||||
584 | // instantiation time. | ||||||
585 | NNS = NestedNameSpecifier::Create(Context, nullptr, RD->isTemplateDecl(), | ||||||
586 | RD->getTypeForDecl()); | ||||||
587 | |||||||
588 | // Diagnose that this identifier was undeclared, and retry the lookup during | ||||||
589 | // template instantiation. | ||||||
590 | Diag(NameLoc, diag::ext_undeclared_unqual_id_with_dependent_base) << &II | ||||||
591 | << RD; | ||||||
592 | } else { | ||||||
593 | // This is not a situation that we should recover from. | ||||||
594 | return ParsedType(); | ||||||
595 | } | ||||||
596 | |||||||
597 | QualType T = Context.getDependentNameType(ETK_None, NNS, &II); | ||||||
598 | |||||||
599 | // Build type location information. We synthesized the qualifier, so we have | ||||||
600 | // to build a fake NestedNameSpecifierLoc. | ||||||
601 | NestedNameSpecifierLocBuilder NNSLocBuilder; | ||||||
602 | NNSLocBuilder.MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
603 | NestedNameSpecifierLoc QualifierLoc = NNSLocBuilder.getWithLocInContext(Context); | ||||||
604 | |||||||
605 | TypeLocBuilder Builder; | ||||||
606 | DependentNameTypeLoc DepTL = Builder.push<DependentNameTypeLoc>(T); | ||||||
607 | DepTL.setNameLoc(NameLoc); | ||||||
608 | DepTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
609 | DepTL.setQualifierLoc(QualifierLoc); | ||||||
610 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
611 | } | ||||||
612 | |||||||
613 | /// isTagName() - This method is called *for error recovery purposes only* | ||||||
614 | /// to determine if the specified name is a valid tag name ("struct foo"). If | ||||||
615 | /// so, this returns the TST for the tag corresponding to it (TST_enum, | ||||||
616 | /// TST_union, TST_struct, TST_interface, TST_class). This is used to diagnose | ||||||
617 | /// cases in C where the user forgot to specify the tag. | ||||||
618 | DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) { | ||||||
619 | // Do a tag name lookup in this scope. | ||||||
620 | LookupResult R(*this, &II, SourceLocation(), LookupTagName); | ||||||
621 | LookupName(R, S, false); | ||||||
622 | R.suppressDiagnostics(); | ||||||
623 | if (R.getResultKind() == LookupResult::Found) | ||||||
624 | if (const TagDecl *TD = R.getAsSingle<TagDecl>()) { | ||||||
625 | switch (TD->getTagKind()) { | ||||||
626 | case TTK_Struct: return DeclSpec::TST_struct; | ||||||
627 | case TTK_Interface: return DeclSpec::TST_interface; | ||||||
628 | case TTK_Union: return DeclSpec::TST_union; | ||||||
629 | case TTK_Class: return DeclSpec::TST_class; | ||||||
630 | case TTK_Enum: return DeclSpec::TST_enum; | ||||||
631 | } | ||||||
632 | } | ||||||
633 | |||||||
634 | return DeclSpec::TST_unspecified; | ||||||
635 | } | ||||||
636 | |||||||
637 | /// isMicrosoftMissingTypename - In Microsoft mode, within class scope, | ||||||
638 | /// if a CXXScopeSpec's type is equal to the type of one of the base classes | ||||||
639 | /// then downgrade the missing typename error to a warning. | ||||||
640 | /// This is needed for MSVC compatibility; Example: | ||||||
641 | /// @code | ||||||
642 | /// template<class T> class A { | ||||||
643 | /// public: | ||||||
644 | /// typedef int TYPE; | ||||||
645 | /// }; | ||||||
646 | /// template<class T> class B : public A<T> { | ||||||
647 | /// public: | ||||||
648 | /// A<T>::TYPE a; // no typename required because A<T> is a base class. | ||||||
649 | /// }; | ||||||
650 | /// @endcode | ||||||
651 | bool Sema::isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S) { | ||||||
652 | if (CurContext->isRecord()) { | ||||||
653 | if (SS->getScopeRep()->getKind() == NestedNameSpecifier::Super) | ||||||
654 | return true; | ||||||
655 | |||||||
656 | const Type *Ty = SS->getScopeRep()->getAsType(); | ||||||
657 | |||||||
658 | CXXRecordDecl *RD = cast<CXXRecordDecl>(CurContext); | ||||||
659 | for (const auto &Base : RD->bases()) | ||||||
660 | if (Ty && Context.hasSameUnqualifiedType(QualType(Ty, 1), Base.getType())) | ||||||
661 | return true; | ||||||
662 | return S->isFunctionPrototypeScope(); | ||||||
663 | } | ||||||
664 | return CurContext->isFunctionOrMethod() || S->isFunctionPrototypeScope(); | ||||||
665 | } | ||||||
666 | |||||||
667 | void Sema::DiagnoseUnknownTypeName(IdentifierInfo *&II, | ||||||
668 | SourceLocation IILoc, | ||||||
669 | Scope *S, | ||||||
670 | CXXScopeSpec *SS, | ||||||
671 | ParsedType &SuggestedType, | ||||||
672 | bool IsTemplateName) { | ||||||
673 | // Don't report typename errors for editor placeholders. | ||||||
674 | if (II->isEditorPlaceholder()) | ||||||
675 | return; | ||||||
676 | // We don't have anything to suggest (yet). | ||||||
677 | SuggestedType = nullptr; | ||||||
678 | |||||||
679 | // There may have been a typo in the name of the type. Look up typo | ||||||
680 | // results, in case we have something that we can suggest. | ||||||
681 | TypeNameValidatorCCC CCC(/*AllowInvalid=*/false, /*WantClass=*/false, | ||||||
682 | /*AllowTemplates=*/IsTemplateName, | ||||||
683 | /*AllowNonTemplates=*/!IsTemplateName); | ||||||
684 | if (TypoCorrection Corrected = | ||||||
685 | CorrectTypo(DeclarationNameInfo(II, IILoc), LookupOrdinaryName, S, SS, | ||||||
686 | CCC, CTK_ErrorRecovery)) { | ||||||
687 | // FIXME: Support error recovery for the template-name case. | ||||||
688 | bool CanRecover = !IsTemplateName; | ||||||
689 | if (Corrected.isKeyword()) { | ||||||
690 | // We corrected to a keyword. | ||||||
691 | diagnoseTypo(Corrected, | ||||||
692 | PDiag(IsTemplateName ? diag::err_no_template_suggest | ||||||
693 | : diag::err_unknown_typename_suggest) | ||||||
694 | << II); | ||||||
695 | II = Corrected.getCorrectionAsIdentifierInfo(); | ||||||
696 | } else { | ||||||
697 | // We found a similarly-named type or interface; suggest that. | ||||||
698 | if (!SS || !SS->isSet()) { | ||||||
699 | diagnoseTypo(Corrected, | ||||||
700 | PDiag(IsTemplateName ? diag::err_no_template_suggest | ||||||
701 | : diag::err_unknown_typename_suggest) | ||||||
702 | << II, CanRecover); | ||||||
703 | } else if (DeclContext *DC = computeDeclContext(*SS, false)) { | ||||||
704 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | ||||||
705 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | ||||||
706 | II->getName().equals(CorrectedStr); | ||||||
707 | diagnoseTypo(Corrected, | ||||||
708 | PDiag(IsTemplateName | ||||||
709 | ? diag::err_no_member_template_suggest | ||||||
710 | : diag::err_unknown_nested_typename_suggest) | ||||||
711 | << II << DC << DroppedSpecifier << SS->getRange(), | ||||||
712 | CanRecover); | ||||||
713 | } else { | ||||||
714 | llvm_unreachable("could not have corrected a typo here")::llvm::llvm_unreachable_internal("could not have corrected a typo here" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 714); | ||||||
715 | } | ||||||
716 | |||||||
717 | if (!CanRecover) | ||||||
718 | return; | ||||||
719 | |||||||
720 | CXXScopeSpec tmpSS; | ||||||
721 | if (Corrected.getCorrectionSpecifier()) | ||||||
722 | tmpSS.MakeTrivial(Context, Corrected.getCorrectionSpecifier(), | ||||||
723 | SourceRange(IILoc)); | ||||||
724 | // FIXME: Support class template argument deduction here. | ||||||
725 | SuggestedType = | ||||||
726 | getTypeName(*Corrected.getCorrectionAsIdentifierInfo(), IILoc, S, | ||||||
727 | tmpSS.isSet() ? &tmpSS : SS, false, false, nullptr, | ||||||
728 | /*IsCtorOrDtorName=*/false, | ||||||
729 | /*WantNontrivialTypeSourceInfo=*/true); | ||||||
730 | } | ||||||
731 | return; | ||||||
732 | } | ||||||
733 | |||||||
734 | if (getLangOpts().CPlusPlus && !IsTemplateName) { | ||||||
735 | // See if II is a class template that the user forgot to pass arguments to. | ||||||
736 | UnqualifiedId Name; | ||||||
737 | Name.setIdentifier(II, IILoc); | ||||||
738 | CXXScopeSpec EmptySS; | ||||||
739 | TemplateTy TemplateResult; | ||||||
740 | bool MemberOfUnknownSpecialization; | ||||||
741 | if (isTemplateName(S, SS ? *SS : EmptySS, /*hasTemplateKeyword=*/false, | ||||||
742 | Name, nullptr, true, TemplateResult, | ||||||
743 | MemberOfUnknownSpecialization) == TNK_Type_template) { | ||||||
744 | diagnoseMissingTemplateArguments(TemplateResult.get(), IILoc); | ||||||
745 | return; | ||||||
746 | } | ||||||
747 | } | ||||||
748 | |||||||
749 | // FIXME: Should we move the logic that tries to recover from a missing tag | ||||||
750 | // (struct, union, enum) from Parser::ParseImplicitInt here, instead? | ||||||
751 | |||||||
752 | if (!SS || (!SS->isSet() && !SS->isInvalid())) | ||||||
753 | Diag(IILoc, IsTemplateName ? diag::err_no_template | ||||||
754 | : diag::err_unknown_typename) | ||||||
755 | << II; | ||||||
756 | else if (DeclContext *DC = computeDeclContext(*SS, false)) | ||||||
757 | Diag(IILoc, IsTemplateName ? diag::err_no_member_template | ||||||
758 | : diag::err_typename_nested_not_found) | ||||||
759 | << II << DC << SS->getRange(); | ||||||
760 | else if (SS->isValid() && SS->getScopeRep()->containsErrors()) { | ||||||
761 | SuggestedType = | ||||||
762 | ActOnTypenameType(S, SourceLocation(), *SS, *II, IILoc).get(); | ||||||
763 | } else if (isDependentScopeSpecifier(*SS)) { | ||||||
764 | unsigned DiagID = diag::err_typename_missing; | ||||||
765 | if (getLangOpts().MSVCCompat && isMicrosoftMissingTypename(SS, S)) | ||||||
766 | DiagID = diag::ext_typename_missing; | ||||||
767 | |||||||
768 | Diag(SS->getRange().getBegin(), DiagID) | ||||||
769 | << SS->getScopeRep() << II->getName() | ||||||
770 | << SourceRange(SS->getRange().getBegin(), IILoc) | ||||||
771 | << FixItHint::CreateInsertion(SS->getRange().getBegin(), "typename "); | ||||||
772 | SuggestedType = ActOnTypenameType(S, SourceLocation(), | ||||||
773 | *SS, *II, IILoc).get(); | ||||||
774 | } else { | ||||||
775 | assert(SS && SS->isInvalid() &&(static_cast <bool> (SS && SS->isInvalid() && "Invalid scope specifier has already been diagnosed") ? void (0) : __assert_fail ("SS && SS->isInvalid() && \"Invalid scope specifier has already been diagnosed\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 776, __extension__ __PRETTY_FUNCTION__)) | ||||||
776 | "Invalid scope specifier has already been diagnosed")(static_cast <bool> (SS && SS->isInvalid() && "Invalid scope specifier has already been diagnosed") ? void (0) : __assert_fail ("SS && SS->isInvalid() && \"Invalid scope specifier has already been diagnosed\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 776, __extension__ __PRETTY_FUNCTION__)); | ||||||
777 | } | ||||||
778 | } | ||||||
779 | |||||||
780 | /// Determine whether the given result set contains either a type name | ||||||
781 | /// or | ||||||
782 | static bool isResultTypeOrTemplate(LookupResult &R, const Token &NextToken) { | ||||||
783 | bool CheckTemplate = R.getSema().getLangOpts().CPlusPlus && | ||||||
784 | NextToken.is(tok::less); | ||||||
785 | |||||||
786 | for (LookupResult::iterator I = R.begin(), IEnd = R.end(); I != IEnd; ++I) { | ||||||
787 | if (isa<TypeDecl>(*I) || isa<ObjCInterfaceDecl>(*I)) | ||||||
788 | return true; | ||||||
789 | |||||||
790 | if (CheckTemplate && isa<TemplateDecl>(*I)) | ||||||
791 | return true; | ||||||
792 | } | ||||||
793 | |||||||
794 | return false; | ||||||
795 | } | ||||||
796 | |||||||
797 | static bool isTagTypeWithMissingTag(Sema &SemaRef, LookupResult &Result, | ||||||
798 | Scope *S, CXXScopeSpec &SS, | ||||||
799 | IdentifierInfo *&Name, | ||||||
800 | SourceLocation NameLoc) { | ||||||
801 | LookupResult R(SemaRef, Name, NameLoc, Sema::LookupTagName); | ||||||
802 | SemaRef.LookupParsedName(R, S, &SS); | ||||||
803 | if (TagDecl *Tag = R.getAsSingle<TagDecl>()) { | ||||||
804 | StringRef FixItTagName; | ||||||
805 | switch (Tag->getTagKind()) { | ||||||
806 | case TTK_Class: | ||||||
807 | FixItTagName = "class "; | ||||||
808 | break; | ||||||
809 | |||||||
810 | case TTK_Enum: | ||||||
811 | FixItTagName = "enum "; | ||||||
812 | break; | ||||||
813 | |||||||
814 | case TTK_Struct: | ||||||
815 | FixItTagName = "struct "; | ||||||
816 | break; | ||||||
817 | |||||||
818 | case TTK_Interface: | ||||||
819 | FixItTagName = "__interface "; | ||||||
820 | break; | ||||||
821 | |||||||
822 | case TTK_Union: | ||||||
823 | FixItTagName = "union "; | ||||||
824 | break; | ||||||
825 | } | ||||||
826 | |||||||
827 | StringRef TagName = FixItTagName.drop_back(); | ||||||
828 | SemaRef.Diag(NameLoc, diag::err_use_of_tag_name_without_tag) | ||||||
829 | << Name << TagName << SemaRef.getLangOpts().CPlusPlus | ||||||
830 | << FixItHint::CreateInsertion(NameLoc, FixItTagName); | ||||||
831 | |||||||
832 | for (LookupResult::iterator I = Result.begin(), IEnd = Result.end(); | ||||||
833 | I != IEnd; ++I) | ||||||
834 | SemaRef.Diag((*I)->getLocation(), diag::note_decl_hiding_tag_type) | ||||||
835 | << Name << TagName; | ||||||
836 | |||||||
837 | // Replace lookup results with just the tag decl. | ||||||
838 | Result.clear(Sema::LookupTagName); | ||||||
839 | SemaRef.LookupParsedName(Result, S, &SS); | ||||||
840 | return true; | ||||||
841 | } | ||||||
842 | |||||||
843 | return false; | ||||||
844 | } | ||||||
845 | |||||||
846 | /// Build a ParsedType for a simple-type-specifier with a nested-name-specifier. | ||||||
847 | static ParsedType buildNestedType(Sema &S, CXXScopeSpec &SS, | ||||||
848 | QualType T, SourceLocation NameLoc) { | ||||||
849 | ASTContext &Context = S.Context; | ||||||
850 | |||||||
851 | TypeLocBuilder Builder; | ||||||
852 | Builder.pushTypeSpec(T).setNameLoc(NameLoc); | ||||||
853 | |||||||
854 | T = S.getElaboratedType(ETK_None, SS, T); | ||||||
855 | ElaboratedTypeLoc ElabTL = Builder.push<ElaboratedTypeLoc>(T); | ||||||
856 | ElabTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
857 | ElabTL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||
858 | return S.CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
859 | } | ||||||
860 | |||||||
861 | Sema::NameClassification Sema::ClassifyName(Scope *S, CXXScopeSpec &SS, | ||||||
862 | IdentifierInfo *&Name, | ||||||
863 | SourceLocation NameLoc, | ||||||
864 | const Token &NextToken, | ||||||
865 | CorrectionCandidateCallback *CCC) { | ||||||
866 | DeclarationNameInfo NameInfo(Name, NameLoc); | ||||||
867 | ObjCMethodDecl *CurMethod = getCurMethodDecl(); | ||||||
868 | |||||||
869 | assert(NextToken.isNot(tok::coloncolon) &&(static_cast <bool> (NextToken.isNot(tok::coloncolon) && "parse nested name specifiers before calling ClassifyName") ? void (0) : __assert_fail ("NextToken.isNot(tok::coloncolon) && \"parse nested name specifiers before calling ClassifyName\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 870, __extension__ __PRETTY_FUNCTION__)) | ||||||
870 | "parse nested name specifiers before calling ClassifyName")(static_cast <bool> (NextToken.isNot(tok::coloncolon) && "parse nested name specifiers before calling ClassifyName") ? void (0) : __assert_fail ("NextToken.isNot(tok::coloncolon) && \"parse nested name specifiers before calling ClassifyName\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 870, __extension__ __PRETTY_FUNCTION__)); | ||||||
871 | if (getLangOpts().CPlusPlus && SS.isSet() && | ||||||
872 | isCurrentClassName(*Name, S, &SS)) { | ||||||
873 | // Per [class.qual]p2, this names the constructors of SS, not the | ||||||
874 | // injected-class-name. We don't have a classification for that. | ||||||
875 | // There's not much point caching this result, since the parser | ||||||
876 | // will reject it later. | ||||||
877 | return NameClassification::Unknown(); | ||||||
878 | } | ||||||
879 | |||||||
880 | LookupResult Result(*this, Name, NameLoc, LookupOrdinaryName); | ||||||
881 | LookupParsedName(Result, S, &SS, !CurMethod); | ||||||
882 | |||||||
883 | if (SS.isInvalid()) | ||||||
884 | return NameClassification::Error(); | ||||||
885 | |||||||
886 | // For unqualified lookup in a class template in MSVC mode, look into | ||||||
887 | // dependent base classes where the primary class template is known. | ||||||
888 | if (Result.empty() && SS.isEmpty() && getLangOpts().MSVCCompat) { | ||||||
889 | if (ParsedType TypeInBase = | ||||||
890 | recoverFromTypeInKnownDependentBase(*this, *Name, NameLoc)) | ||||||
891 | return TypeInBase; | ||||||
892 | } | ||||||
893 | |||||||
894 | // Perform lookup for Objective-C instance variables (including automatically | ||||||
895 | // synthesized instance variables), if we're in an Objective-C method. | ||||||
896 | // FIXME: This lookup really, really needs to be folded in to the normal | ||||||
897 | // unqualified lookup mechanism. | ||||||
898 | if (SS.isEmpty() && CurMethod && !isResultTypeOrTemplate(Result, NextToken)) { | ||||||
899 | DeclResult Ivar = LookupIvarInObjCMethod(Result, S, Name); | ||||||
900 | if (Ivar.isInvalid()) | ||||||
901 | return NameClassification::Error(); | ||||||
902 | if (Ivar.isUsable()) | ||||||
903 | return NameClassification::NonType(cast<NamedDecl>(Ivar.get())); | ||||||
904 | |||||||
905 | // We defer builtin creation until after ivar lookup inside ObjC methods. | ||||||
906 | if (Result.empty()) | ||||||
907 | LookupBuiltin(Result); | ||||||
908 | } | ||||||
909 | |||||||
910 | bool SecondTry = false; | ||||||
911 | bool IsFilteredTemplateName = false; | ||||||
912 | |||||||
913 | Corrected: | ||||||
914 | switch (Result.getResultKind()) { | ||||||
915 | case LookupResult::NotFound: | ||||||
916 | // If an unqualified-id is followed by a '(', then we have a function | ||||||
917 | // call. | ||||||
918 | if (SS.isEmpty() && NextToken.is(tok::l_paren)) { | ||||||
919 | // In C++, this is an ADL-only call. | ||||||
920 | // FIXME: Reference? | ||||||
921 | if (getLangOpts().CPlusPlus) | ||||||
922 | return NameClassification::UndeclaredNonType(); | ||||||
923 | |||||||
924 | // C90 6.3.2.2: | ||||||
925 | // If the expression that precedes the parenthesized argument list in a | ||||||
926 | // function call consists solely of an identifier, and if no | ||||||
927 | // declaration is visible for this identifier, the identifier is | ||||||
928 | // implicitly declared exactly as if, in the innermost block containing | ||||||
929 | // the function call, the declaration | ||||||
930 | // | ||||||
931 | // extern int identifier (); | ||||||
932 | // | ||||||
933 | // appeared. | ||||||
934 | // | ||||||
935 | // We also allow this in C99 as an extension. | ||||||
936 | if (NamedDecl *D = ImplicitlyDefineFunction(NameLoc, *Name, S)) | ||||||
937 | return NameClassification::NonType(D); | ||||||
938 | } | ||||||
939 | |||||||
940 | if (getLangOpts().CPlusPlus20 && SS.isEmpty() && NextToken.is(tok::less)) { | ||||||
941 | // In C++20 onwards, this could be an ADL-only call to a function | ||||||
942 | // template, and we're required to assume that this is a template name. | ||||||
943 | // | ||||||
944 | // FIXME: Find a way to still do typo correction in this case. | ||||||
945 | TemplateName Template = | ||||||
946 | Context.getAssumedTemplateName(NameInfo.getName()); | ||||||
947 | return NameClassification::UndeclaredTemplate(Template); | ||||||
948 | } | ||||||
949 | |||||||
950 | // In C, we first see whether there is a tag type by the same name, in | ||||||
951 | // which case it's likely that the user just forgot to write "enum", | ||||||
952 | // "struct", or "union". | ||||||
953 | if (!getLangOpts().CPlusPlus && !SecondTry && | ||||||
954 | isTagTypeWithMissingTag(*this, Result, S, SS, Name, NameLoc)) { | ||||||
955 | break; | ||||||
956 | } | ||||||
957 | |||||||
958 | // Perform typo correction to determine if there is another name that is | ||||||
959 | // close to this name. | ||||||
960 | if (!SecondTry && CCC) { | ||||||
961 | SecondTry = true; | ||||||
962 | if (TypoCorrection Corrected = | ||||||
963 | CorrectTypo(Result.getLookupNameInfo(), Result.getLookupKind(), S, | ||||||
964 | &SS, *CCC, CTK_ErrorRecovery)) { | ||||||
965 | unsigned UnqualifiedDiag = diag::err_undeclared_var_use_suggest; | ||||||
966 | unsigned QualifiedDiag = diag::err_no_member_suggest; | ||||||
967 | |||||||
968 | NamedDecl *FirstDecl = Corrected.getFoundDecl(); | ||||||
969 | NamedDecl *UnderlyingFirstDecl = Corrected.getCorrectionDecl(); | ||||||
970 | if (getLangOpts().CPlusPlus && NextToken.is(tok::less) && | ||||||
971 | UnderlyingFirstDecl && isa<TemplateDecl>(UnderlyingFirstDecl)) { | ||||||
972 | UnqualifiedDiag = diag::err_no_template_suggest; | ||||||
973 | QualifiedDiag = diag::err_no_member_template_suggest; | ||||||
974 | } else if (UnderlyingFirstDecl && | ||||||
975 | (isa<TypeDecl>(UnderlyingFirstDecl) || | ||||||
976 | isa<ObjCInterfaceDecl>(UnderlyingFirstDecl) || | ||||||
977 | isa<ObjCCompatibleAliasDecl>(UnderlyingFirstDecl))) { | ||||||
978 | UnqualifiedDiag = diag::err_unknown_typename_suggest; | ||||||
979 | QualifiedDiag = diag::err_unknown_nested_typename_suggest; | ||||||
980 | } | ||||||
981 | |||||||
982 | if (SS.isEmpty()) { | ||||||
983 | diagnoseTypo(Corrected, PDiag(UnqualifiedDiag) << Name); | ||||||
984 | } else {// FIXME: is this even reachable? Test it. | ||||||
985 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | ||||||
986 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | ||||||
987 | Name->getName().equals(CorrectedStr); | ||||||
988 | diagnoseTypo(Corrected, PDiag(QualifiedDiag) | ||||||
989 | << Name << computeDeclContext(SS, false) | ||||||
990 | << DroppedSpecifier << SS.getRange()); | ||||||
991 | } | ||||||
992 | |||||||
993 | // Update the name, so that the caller has the new name. | ||||||
994 | Name = Corrected.getCorrectionAsIdentifierInfo(); | ||||||
995 | |||||||
996 | // Typo correction corrected to a keyword. | ||||||
997 | if (Corrected.isKeyword()) | ||||||
998 | return Name; | ||||||
999 | |||||||
1000 | // Also update the LookupResult... | ||||||
1001 | // FIXME: This should probably go away at some point | ||||||
1002 | Result.clear(); | ||||||
1003 | Result.setLookupName(Corrected.getCorrection()); | ||||||
1004 | if (FirstDecl) | ||||||
1005 | Result.addDecl(FirstDecl); | ||||||
1006 | |||||||
1007 | // If we found an Objective-C instance variable, let | ||||||
1008 | // LookupInObjCMethod build the appropriate expression to | ||||||
1009 | // reference the ivar. | ||||||
1010 | // FIXME: This is a gross hack. | ||||||
1011 | if (ObjCIvarDecl *Ivar = Result.getAsSingle<ObjCIvarDecl>()) { | ||||||
1012 | DeclResult R = | ||||||
1013 | LookupIvarInObjCMethod(Result, S, Ivar->getIdentifier()); | ||||||
1014 | if (R.isInvalid()) | ||||||
1015 | return NameClassification::Error(); | ||||||
1016 | if (R.isUsable()) | ||||||
1017 | return NameClassification::NonType(Ivar); | ||||||
1018 | } | ||||||
1019 | |||||||
1020 | goto Corrected; | ||||||
1021 | } | ||||||
1022 | } | ||||||
1023 | |||||||
1024 | // We failed to correct; just fall through and let the parser deal with it. | ||||||
1025 | Result.suppressDiagnostics(); | ||||||
1026 | return NameClassification::Unknown(); | ||||||
1027 | |||||||
1028 | case LookupResult::NotFoundInCurrentInstantiation: { | ||||||
1029 | // We performed name lookup into the current instantiation, and there were | ||||||
1030 | // dependent bases, so we treat this result the same way as any other | ||||||
1031 | // dependent nested-name-specifier. | ||||||
1032 | |||||||
1033 | // C++ [temp.res]p2: | ||||||
1034 | // A name used in a template declaration or definition and that is | ||||||
1035 | // dependent on a template-parameter is assumed not to name a type | ||||||
1036 | // unless the applicable name lookup finds a type name or the name is | ||||||
1037 | // qualified by the keyword typename. | ||||||
1038 | // | ||||||
1039 | // FIXME: If the next token is '<', we might want to ask the parser to | ||||||
1040 | // perform some heroics to see if we actually have a | ||||||
1041 | // template-argument-list, which would indicate a missing 'template' | ||||||
1042 | // keyword here. | ||||||
1043 | return NameClassification::DependentNonType(); | ||||||
1044 | } | ||||||
1045 | |||||||
1046 | case LookupResult::Found: | ||||||
1047 | case LookupResult::FoundOverloaded: | ||||||
1048 | case LookupResult::FoundUnresolvedValue: | ||||||
1049 | break; | ||||||
1050 | |||||||
1051 | case LookupResult::Ambiguous: | ||||||
1052 | if (getLangOpts().CPlusPlus && NextToken.is(tok::less) && | ||||||
1053 | hasAnyAcceptableTemplateNames(Result, /*AllowFunctionTemplates=*/true, | ||||||
1054 | /*AllowDependent=*/false)) { | ||||||
1055 | // C++ [temp.local]p3: | ||||||
1056 | // A lookup that finds an injected-class-name (10.2) can result in an | ||||||
1057 | // ambiguity in certain cases (for example, if it is found in more than | ||||||
1058 | // one base class). If all of the injected-class-names that are found | ||||||
1059 | // refer to specializations of the same class template, and if the name | ||||||
1060 | // is followed by a template-argument-list, the reference refers to the | ||||||
1061 | // class template itself and not a specialization thereof, and is not | ||||||
1062 | // ambiguous. | ||||||
1063 | // | ||||||
1064 | // This filtering can make an ambiguous result into an unambiguous one, | ||||||
1065 | // so try again after filtering out template names. | ||||||
1066 | FilterAcceptableTemplateNames(Result); | ||||||
1067 | if (!Result.isAmbiguous()) { | ||||||
1068 | IsFilteredTemplateName = true; | ||||||
1069 | break; | ||||||
1070 | } | ||||||
1071 | } | ||||||
1072 | |||||||
1073 | // Diagnose the ambiguity and return an error. | ||||||
1074 | return NameClassification::Error(); | ||||||
1075 | } | ||||||
1076 | |||||||
1077 | if (getLangOpts().CPlusPlus && NextToken.is(tok::less) && | ||||||
1078 | (IsFilteredTemplateName || | ||||||
1079 | hasAnyAcceptableTemplateNames( | ||||||
1080 | Result, /*AllowFunctionTemplates=*/true, | ||||||
1081 | /*AllowDependent=*/false, | ||||||
1082 | /*AllowNonTemplateFunctions*/ SS.isEmpty() && | ||||||
1083 | getLangOpts().CPlusPlus20))) { | ||||||
1084 | // C++ [temp.names]p3: | ||||||
1085 | // After name lookup (3.4) finds that a name is a template-name or that | ||||||
1086 | // an operator-function-id or a literal- operator-id refers to a set of | ||||||
1087 | // overloaded functions any member of which is a function template if | ||||||
1088 | // this is followed by a <, the < is always taken as the delimiter of a | ||||||
1089 | // template-argument-list and never as the less-than operator. | ||||||
1090 | // C++2a [temp.names]p2: | ||||||
1091 | // A name is also considered to refer to a template if it is an | ||||||
1092 | // unqualified-id followed by a < and name lookup finds either one | ||||||
1093 | // or more functions or finds nothing. | ||||||
1094 | if (!IsFilteredTemplateName) | ||||||
1095 | FilterAcceptableTemplateNames(Result); | ||||||
1096 | |||||||
1097 | bool IsFunctionTemplate; | ||||||
1098 | bool IsVarTemplate; | ||||||
1099 | TemplateName Template; | ||||||
1100 | if (Result.end() - Result.begin() > 1) { | ||||||
1101 | IsFunctionTemplate = true; | ||||||
1102 | Template = Context.getOverloadedTemplateName(Result.begin(), | ||||||
1103 | Result.end()); | ||||||
1104 | } else if (!Result.empty()) { | ||||||
1105 | auto *TD = cast<TemplateDecl>(getAsTemplateNameDecl( | ||||||
1106 | *Result.begin(), /*AllowFunctionTemplates=*/true, | ||||||
1107 | /*AllowDependent=*/false)); | ||||||
1108 | IsFunctionTemplate = isa<FunctionTemplateDecl>(TD); | ||||||
1109 | IsVarTemplate = isa<VarTemplateDecl>(TD); | ||||||
1110 | |||||||
1111 | if (SS.isNotEmpty()) | ||||||
1112 | Template = | ||||||
1113 | Context.getQualifiedTemplateName(SS.getScopeRep(), | ||||||
1114 | /*TemplateKeyword=*/false, TD); | ||||||
1115 | else | ||||||
1116 | Template = TemplateName(TD); | ||||||
1117 | } else { | ||||||
1118 | // All results were non-template functions. This is a function template | ||||||
1119 | // name. | ||||||
1120 | IsFunctionTemplate = true; | ||||||
1121 | Template = Context.getAssumedTemplateName(NameInfo.getName()); | ||||||
1122 | } | ||||||
1123 | |||||||
1124 | if (IsFunctionTemplate) { | ||||||
1125 | // Function templates always go through overload resolution, at which | ||||||
1126 | // point we'll perform the various checks (e.g., accessibility) we need | ||||||
1127 | // to based on which function we selected. | ||||||
1128 | Result.suppressDiagnostics(); | ||||||
1129 | |||||||
1130 | return NameClassification::FunctionTemplate(Template); | ||||||
1131 | } | ||||||
1132 | |||||||
1133 | return IsVarTemplate ? NameClassification::VarTemplate(Template) | ||||||
1134 | : NameClassification::TypeTemplate(Template); | ||||||
1135 | } | ||||||
1136 | |||||||
1137 | NamedDecl *FirstDecl = (*Result.begin())->getUnderlyingDecl(); | ||||||
1138 | if (TypeDecl *Type = dyn_cast<TypeDecl>(FirstDecl)) { | ||||||
1139 | DiagnoseUseOfDecl(Type, NameLoc); | ||||||
1140 | MarkAnyDeclReferenced(Type->getLocation(), Type, /*OdrUse=*/false); | ||||||
1141 | QualType T = Context.getTypeDeclType(Type); | ||||||
1142 | if (SS.isNotEmpty()) | ||||||
1143 | return buildNestedType(*this, SS, T, NameLoc); | ||||||
1144 | return ParsedType::make(T); | ||||||
1145 | } | ||||||
1146 | |||||||
1147 | ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(FirstDecl); | ||||||
1148 | if (!Class) { | ||||||
1149 | // FIXME: It's unfortunate that we don't have a Type node for handling this. | ||||||
1150 | if (ObjCCompatibleAliasDecl *Alias = | ||||||
1151 | dyn_cast<ObjCCompatibleAliasDecl>(FirstDecl)) | ||||||
1152 | Class = Alias->getClassInterface(); | ||||||
1153 | } | ||||||
1154 | |||||||
1155 | if (Class) { | ||||||
1156 | DiagnoseUseOfDecl(Class, NameLoc); | ||||||
1157 | |||||||
1158 | if (NextToken.is(tok::period)) { | ||||||
1159 | // Interface. <something> is parsed as a property reference expression. | ||||||
1160 | // Just return "unknown" as a fall-through for now. | ||||||
1161 | Result.suppressDiagnostics(); | ||||||
1162 | return NameClassification::Unknown(); | ||||||
1163 | } | ||||||
1164 | |||||||
1165 | QualType T = Context.getObjCInterfaceType(Class); | ||||||
1166 | return ParsedType::make(T); | ||||||
1167 | } | ||||||
1168 | |||||||
1169 | if (isa<ConceptDecl>(FirstDecl)) | ||||||
1170 | return NameClassification::Concept( | ||||||
1171 | TemplateName(cast<TemplateDecl>(FirstDecl))); | ||||||
1172 | |||||||
1173 | if (auto *EmptyD = dyn_cast<UnresolvedUsingIfExistsDecl>(FirstDecl)) { | ||||||
1174 | (void)DiagnoseUseOfDecl(EmptyD, NameLoc); | ||||||
1175 | return NameClassification::Error(); | ||||||
1176 | } | ||||||
1177 | |||||||
1178 | // We can have a type template here if we're classifying a template argument. | ||||||
1179 | if (isa<TemplateDecl>(FirstDecl) && !isa<FunctionTemplateDecl>(FirstDecl) && | ||||||
1180 | !isa<VarTemplateDecl>(FirstDecl)) | ||||||
1181 | return NameClassification::TypeTemplate( | ||||||
1182 | TemplateName(cast<TemplateDecl>(FirstDecl))); | ||||||
1183 | |||||||
1184 | // Check for a tag type hidden by a non-type decl in a few cases where it | ||||||
1185 | // seems likely a type is wanted instead of the non-type that was found. | ||||||
1186 | bool NextIsOp = NextToken.isOneOf(tok::amp, tok::star); | ||||||
1187 | if ((NextToken.is(tok::identifier) || | ||||||
1188 | (NextIsOp && | ||||||
1189 | FirstDecl->getUnderlyingDecl()->isFunctionOrFunctionTemplate())) && | ||||||
1190 | isTagTypeWithMissingTag(*this, Result, S, SS, Name, NameLoc)) { | ||||||
1191 | TypeDecl *Type = Result.getAsSingle<TypeDecl>(); | ||||||
1192 | DiagnoseUseOfDecl(Type, NameLoc); | ||||||
1193 | QualType T = Context.getTypeDeclType(Type); | ||||||
1194 | if (SS.isNotEmpty()) | ||||||
1195 | return buildNestedType(*this, SS, T, NameLoc); | ||||||
1196 | return ParsedType::make(T); | ||||||
1197 | } | ||||||
1198 | |||||||
1199 | // If we already know which single declaration is referenced, just annotate | ||||||
1200 | // that declaration directly. Defer resolving even non-overloaded class | ||||||
1201 | // member accesses, as we need to defer certain access checks until we know | ||||||
1202 | // the context. | ||||||
1203 | bool ADL = UseArgumentDependentLookup(SS, Result, NextToken.is(tok::l_paren)); | ||||||
1204 | if (Result.isSingleResult() && !ADL && !FirstDecl->isCXXClassMember()) | ||||||
1205 | return NameClassification::NonType(Result.getRepresentativeDecl()); | ||||||
1206 | |||||||
1207 | // Otherwise, this is an overload set that we will need to resolve later. | ||||||
1208 | Result.suppressDiagnostics(); | ||||||
1209 | return NameClassification::OverloadSet(UnresolvedLookupExpr::Create( | ||||||
1210 | Context, Result.getNamingClass(), SS.getWithLocInContext(Context), | ||||||
1211 | Result.getLookupNameInfo(), ADL, Result.isOverloadedResult(), | ||||||
1212 | Result.begin(), Result.end())); | ||||||
1213 | } | ||||||
1214 | |||||||
1215 | ExprResult | ||||||
1216 | Sema::ActOnNameClassifiedAsUndeclaredNonType(IdentifierInfo *Name, | ||||||
1217 | SourceLocation NameLoc) { | ||||||
1218 | assert(getLangOpts().CPlusPlus && "ADL-only call in C?")(static_cast <bool> (getLangOpts().CPlusPlus && "ADL-only call in C?") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"ADL-only call in C?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1218, __extension__ __PRETTY_FUNCTION__)); | ||||||
1219 | CXXScopeSpec SS; | ||||||
1220 | LookupResult Result(*this, Name, NameLoc, LookupOrdinaryName); | ||||||
1221 | return BuildDeclarationNameExpr(SS, Result, /*ADL=*/true); | ||||||
1222 | } | ||||||
1223 | |||||||
1224 | ExprResult | ||||||
1225 | Sema::ActOnNameClassifiedAsDependentNonType(const CXXScopeSpec &SS, | ||||||
1226 | IdentifierInfo *Name, | ||||||
1227 | SourceLocation NameLoc, | ||||||
1228 | bool IsAddressOfOperand) { | ||||||
1229 | DeclarationNameInfo NameInfo(Name, NameLoc); | ||||||
1230 | return ActOnDependentIdExpression(SS, /*TemplateKWLoc=*/SourceLocation(), | ||||||
1231 | NameInfo, IsAddressOfOperand, | ||||||
1232 | /*TemplateArgs=*/nullptr); | ||||||
1233 | } | ||||||
1234 | |||||||
1235 | ExprResult Sema::ActOnNameClassifiedAsNonType(Scope *S, const CXXScopeSpec &SS, | ||||||
1236 | NamedDecl *Found, | ||||||
1237 | SourceLocation NameLoc, | ||||||
1238 | const Token &NextToken) { | ||||||
1239 | if (getCurMethodDecl() && SS.isEmpty()) | ||||||
1240 | if (auto *Ivar = dyn_cast<ObjCIvarDecl>(Found->getUnderlyingDecl())) | ||||||
1241 | return BuildIvarRefExpr(S, NameLoc, Ivar); | ||||||
1242 | |||||||
1243 | // Reconstruct the lookup result. | ||||||
1244 | LookupResult Result(*this, Found->getDeclName(), NameLoc, LookupOrdinaryName); | ||||||
1245 | Result.addDecl(Found); | ||||||
1246 | Result.resolveKind(); | ||||||
1247 | |||||||
1248 | bool ADL = UseArgumentDependentLookup(SS, Result, NextToken.is(tok::l_paren)); | ||||||
1249 | return BuildDeclarationNameExpr(SS, Result, ADL); | ||||||
1250 | } | ||||||
1251 | |||||||
1252 | ExprResult Sema::ActOnNameClassifiedAsOverloadSet(Scope *S, Expr *E) { | ||||||
1253 | // For an implicit class member access, transform the result into a member | ||||||
1254 | // access expression if necessary. | ||||||
1255 | auto *ULE = cast<UnresolvedLookupExpr>(E); | ||||||
1256 | if ((*ULE->decls_begin())->isCXXClassMember()) { | ||||||
1257 | CXXScopeSpec SS; | ||||||
1258 | SS.Adopt(ULE->getQualifierLoc()); | ||||||
1259 | |||||||
1260 | // Reconstruct the lookup result. | ||||||
1261 | LookupResult Result(*this, ULE->getName(), ULE->getNameLoc(), | ||||||
1262 | LookupOrdinaryName); | ||||||
1263 | Result.setNamingClass(ULE->getNamingClass()); | ||||||
1264 | for (auto I = ULE->decls_begin(), E = ULE->decls_end(); I != E; ++I) | ||||||
1265 | Result.addDecl(*I, I.getAccess()); | ||||||
1266 | Result.resolveKind(); | ||||||
1267 | return BuildPossibleImplicitMemberExpr(SS, SourceLocation(), Result, | ||||||
1268 | nullptr, S); | ||||||
1269 | } | ||||||
1270 | |||||||
1271 | // Otherwise, this is already in the form we needed, and no further checks | ||||||
1272 | // are necessary. | ||||||
1273 | return ULE; | ||||||
1274 | } | ||||||
1275 | |||||||
1276 | Sema::TemplateNameKindForDiagnostics | ||||||
1277 | Sema::getTemplateNameKindForDiagnostics(TemplateName Name) { | ||||||
1278 | auto *TD = Name.getAsTemplateDecl(); | ||||||
1279 | if (!TD) | ||||||
1280 | return TemplateNameKindForDiagnostics::DependentTemplate; | ||||||
1281 | if (isa<ClassTemplateDecl>(TD)) | ||||||
1282 | return TemplateNameKindForDiagnostics::ClassTemplate; | ||||||
1283 | if (isa<FunctionTemplateDecl>(TD)) | ||||||
1284 | return TemplateNameKindForDiagnostics::FunctionTemplate; | ||||||
1285 | if (isa<VarTemplateDecl>(TD)) | ||||||
1286 | return TemplateNameKindForDiagnostics::VarTemplate; | ||||||
1287 | if (isa<TypeAliasTemplateDecl>(TD)) | ||||||
1288 | return TemplateNameKindForDiagnostics::AliasTemplate; | ||||||
1289 | if (isa<TemplateTemplateParmDecl>(TD)) | ||||||
1290 | return TemplateNameKindForDiagnostics::TemplateTemplateParam; | ||||||
1291 | if (isa<ConceptDecl>(TD)) | ||||||
1292 | return TemplateNameKindForDiagnostics::Concept; | ||||||
1293 | return TemplateNameKindForDiagnostics::DependentTemplate; | ||||||
1294 | } | ||||||
1295 | |||||||
1296 | void Sema::PushDeclContext(Scope *S, DeclContext *DC) { | ||||||
1297 | assert(DC->getLexicalParent() == CurContext &&(static_cast <bool> (DC->getLexicalParent() == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("DC->getLexicalParent() == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1298, __extension__ __PRETTY_FUNCTION__)) | ||||||
1298 | "The next DeclContext should be lexically contained in the current one.")(static_cast <bool> (DC->getLexicalParent() == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("DC->getLexicalParent() == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1298, __extension__ __PRETTY_FUNCTION__)); | ||||||
1299 | CurContext = DC; | ||||||
1300 | S->setEntity(DC); | ||||||
1301 | } | ||||||
1302 | |||||||
1303 | void Sema::PopDeclContext() { | ||||||
1304 | assert(CurContext && "DeclContext imbalance!")(static_cast <bool> (CurContext && "DeclContext imbalance!" ) ? void (0) : __assert_fail ("CurContext && \"DeclContext imbalance!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1304, __extension__ __PRETTY_FUNCTION__)); | ||||||
1305 | |||||||
1306 | CurContext = CurContext->getLexicalParent(); | ||||||
1307 | assert(CurContext && "Popped translation unit!")(static_cast <bool> (CurContext && "Popped translation unit!" ) ? void (0) : __assert_fail ("CurContext && \"Popped translation unit!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1307, __extension__ __PRETTY_FUNCTION__)); | ||||||
1308 | } | ||||||
1309 | |||||||
1310 | Sema::SkippedDefinitionContext Sema::ActOnTagStartSkippedDefinition(Scope *S, | ||||||
1311 | Decl *D) { | ||||||
1312 | // Unlike PushDeclContext, the context to which we return is not necessarily | ||||||
1313 | // the containing DC of TD, because the new context will be some pre-existing | ||||||
1314 | // TagDecl definition instead of a fresh one. | ||||||
1315 | auto Result = static_cast<SkippedDefinitionContext>(CurContext); | ||||||
1316 | CurContext = cast<TagDecl>(D)->getDefinition(); | ||||||
1317 | assert(CurContext && "skipping definition of undefined tag")(static_cast <bool> (CurContext && "skipping definition of undefined tag" ) ? void (0) : __assert_fail ("CurContext && \"skipping definition of undefined tag\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1317, __extension__ __PRETTY_FUNCTION__)); | ||||||
1318 | // Start lookups from the parent of the current context; we don't want to look | ||||||
1319 | // into the pre-existing complete definition. | ||||||
1320 | S->setEntity(CurContext->getLookupParent()); | ||||||
1321 | return Result; | ||||||
1322 | } | ||||||
1323 | |||||||
1324 | void Sema::ActOnTagFinishSkippedDefinition(SkippedDefinitionContext Context) { | ||||||
1325 | CurContext = static_cast<decltype(CurContext)>(Context); | ||||||
1326 | } | ||||||
1327 | |||||||
1328 | /// EnterDeclaratorContext - Used when we must lookup names in the context | ||||||
1329 | /// of a declarator's nested name specifier. | ||||||
1330 | /// | ||||||
1331 | void Sema::EnterDeclaratorContext(Scope *S, DeclContext *DC) { | ||||||
1332 | // C++0x [basic.lookup.unqual]p13: | ||||||
1333 | // A name used in the definition of a static data member of class | ||||||
1334 | // X (after the qualified-id of the static member) is looked up as | ||||||
1335 | // if the name was used in a member function of X. | ||||||
1336 | // C++0x [basic.lookup.unqual]p14: | ||||||
1337 | // If a variable member of a namespace is defined outside of the | ||||||
1338 | // scope of its namespace then any name used in the definition of | ||||||
1339 | // the variable member (after the declarator-id) is looked up as | ||||||
1340 | // if the definition of the variable member occurred in its | ||||||
1341 | // namespace. | ||||||
1342 | // Both of these imply that we should push a scope whose context | ||||||
1343 | // is the semantic context of the declaration. We can't use | ||||||
1344 | // PushDeclContext here because that context is not necessarily | ||||||
1345 | // lexically contained in the current context. Fortunately, | ||||||
1346 | // the containing scope should have the appropriate information. | ||||||
1347 | |||||||
1348 | assert(!S->getEntity() && "scope already has entity")(static_cast <bool> (!S->getEntity() && "scope already has entity" ) ? void (0) : __assert_fail ("!S->getEntity() && \"scope already has entity\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1348, __extension__ __PRETTY_FUNCTION__)); | ||||||
1349 | |||||||
1350 | #ifndef NDEBUG | ||||||
1351 | Scope *Ancestor = S->getParent(); | ||||||
1352 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); | ||||||
1353 | assert(Ancestor->getEntity() == CurContext && "ancestor context mismatch")(static_cast <bool> (Ancestor->getEntity() == CurContext && "ancestor context mismatch") ? void (0) : __assert_fail ("Ancestor->getEntity() == CurContext && \"ancestor context mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1353, __extension__ __PRETTY_FUNCTION__)); | ||||||
1354 | #endif | ||||||
1355 | |||||||
1356 | CurContext = DC; | ||||||
1357 | S->setEntity(DC); | ||||||
1358 | |||||||
1359 | if (S->getParent()->isTemplateParamScope()) { | ||||||
1360 | // Also set the corresponding entities for all immediately-enclosing | ||||||
1361 | // template parameter scopes. | ||||||
1362 | EnterTemplatedContext(S->getParent(), DC); | ||||||
1363 | } | ||||||
1364 | } | ||||||
1365 | |||||||
1366 | void Sema::ExitDeclaratorContext(Scope *S) { | ||||||
1367 | assert(S->getEntity() == CurContext && "Context imbalance!")(static_cast <bool> (S->getEntity() == CurContext && "Context imbalance!") ? void (0) : __assert_fail ("S->getEntity() == CurContext && \"Context imbalance!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1367, __extension__ __PRETTY_FUNCTION__)); | ||||||
1368 | |||||||
1369 | // Switch back to the lexical context. The safety of this is | ||||||
1370 | // enforced by an assert in EnterDeclaratorContext. | ||||||
1371 | Scope *Ancestor = S->getParent(); | ||||||
1372 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); | ||||||
1373 | CurContext = Ancestor->getEntity(); | ||||||
1374 | |||||||
1375 | // We don't need to do anything with the scope, which is going to | ||||||
1376 | // disappear. | ||||||
1377 | } | ||||||
1378 | |||||||
1379 | void Sema::EnterTemplatedContext(Scope *S, DeclContext *DC) { | ||||||
1380 | assert(S->isTemplateParamScope() &&(static_cast <bool> (S->isTemplateParamScope() && "expected to be initializing a template parameter scope") ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"expected to be initializing a template parameter scope\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1381, __extension__ __PRETTY_FUNCTION__)) | ||||||
1381 | "expected to be initializing a template parameter scope")(static_cast <bool> (S->isTemplateParamScope() && "expected to be initializing a template parameter scope") ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"expected to be initializing a template parameter scope\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1381, __extension__ __PRETTY_FUNCTION__)); | ||||||
1382 | |||||||
1383 | // C++20 [temp.local]p7: | ||||||
1384 | // In the definition of a member of a class template that appears outside | ||||||
1385 | // of the class template definition, the name of a member of the class | ||||||
1386 | // template hides the name of a template-parameter of any enclosing class | ||||||
1387 | // templates (but not a template-parameter of the member if the member is a | ||||||
1388 | // class or function template). | ||||||
1389 | // C++20 [temp.local]p9: | ||||||
1390 | // In the definition of a class template or in the definition of a member | ||||||
1391 | // of such a template that appears outside of the template definition, for | ||||||
1392 | // each non-dependent base class (13.8.2.1), if the name of the base class | ||||||
1393 | // or the name of a member of the base class is the same as the name of a | ||||||
1394 | // template-parameter, the base class name or member name hides the | ||||||
1395 | // template-parameter name (6.4.10). | ||||||
1396 | // | ||||||
1397 | // This means that a template parameter scope should be searched immediately | ||||||
1398 | // after searching the DeclContext for which it is a template parameter | ||||||
1399 | // scope. For example, for | ||||||
1400 | // template<typename T> template<typename U> template<typename V> | ||||||
1401 | // void N::A<T>::B<U>::f(...) | ||||||
1402 | // we search V then B<U> (and base classes) then U then A<T> (and base | ||||||
1403 | // classes) then T then N then ::. | ||||||
1404 | unsigned ScopeDepth = getTemplateDepth(S); | ||||||
1405 | for (; S && S->isTemplateParamScope(); S = S->getParent(), --ScopeDepth) { | ||||||
1406 | DeclContext *SearchDCAfterScope = DC; | ||||||
1407 | for (; DC; DC = DC->getLookupParent()) { | ||||||
1408 | if (const TemplateParameterList *TPL = | ||||||
1409 | cast<Decl>(DC)->getDescribedTemplateParams()) { | ||||||
1410 | unsigned DCDepth = TPL->getDepth() + 1; | ||||||
1411 | if (DCDepth > ScopeDepth) | ||||||
1412 | continue; | ||||||
1413 | if (ScopeDepth == DCDepth) | ||||||
1414 | SearchDCAfterScope = DC = DC->getLookupParent(); | ||||||
1415 | break; | ||||||
1416 | } | ||||||
1417 | } | ||||||
1418 | S->setLookupEntity(SearchDCAfterScope); | ||||||
1419 | } | ||||||
1420 | } | ||||||
1421 | |||||||
1422 | void Sema::ActOnReenterFunctionContext(Scope* S, Decl *D) { | ||||||
1423 | // We assume that the caller has already called | ||||||
1424 | // ActOnReenterTemplateScope so getTemplatedDecl() works. | ||||||
1425 | FunctionDecl *FD = D->getAsFunction(); | ||||||
1426 | if (!FD) | ||||||
1427 | return; | ||||||
1428 | |||||||
1429 | // Same implementation as PushDeclContext, but enters the context | ||||||
1430 | // from the lexical parent, rather than the top-level class. | ||||||
1431 | assert(CurContext == FD->getLexicalParent() &&(static_cast <bool> (CurContext == FD->getLexicalParent () && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("CurContext == FD->getLexicalParent() && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1432, __extension__ __PRETTY_FUNCTION__)) | ||||||
1432 | "The next DeclContext should be lexically contained in the current one.")(static_cast <bool> (CurContext == FD->getLexicalParent () && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("CurContext == FD->getLexicalParent() && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1432, __extension__ __PRETTY_FUNCTION__)); | ||||||
1433 | CurContext = FD; | ||||||
1434 | S->setEntity(CurContext); | ||||||
1435 | |||||||
1436 | for (unsigned P = 0, NumParams = FD->getNumParams(); P < NumParams; ++P) { | ||||||
1437 | ParmVarDecl *Param = FD->getParamDecl(P); | ||||||
1438 | // If the parameter has an identifier, then add it to the scope | ||||||
1439 | if (Param->getIdentifier()) { | ||||||
1440 | S->AddDecl(Param); | ||||||
1441 | IdResolver.AddDecl(Param); | ||||||
1442 | } | ||||||
1443 | } | ||||||
1444 | } | ||||||
1445 | |||||||
1446 | void Sema::ActOnExitFunctionContext() { | ||||||
1447 | // Same implementation as PopDeclContext, but returns to the lexical parent, | ||||||
1448 | // rather than the top-level class. | ||||||
1449 | assert(CurContext && "DeclContext imbalance!")(static_cast <bool> (CurContext && "DeclContext imbalance!" ) ? void (0) : __assert_fail ("CurContext && \"DeclContext imbalance!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1449, __extension__ __PRETTY_FUNCTION__)); | ||||||
1450 | CurContext = CurContext->getLexicalParent(); | ||||||
1451 | assert(CurContext && "Popped translation unit!")(static_cast <bool> (CurContext && "Popped translation unit!" ) ? void (0) : __assert_fail ("CurContext && \"Popped translation unit!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1451, __extension__ __PRETTY_FUNCTION__)); | ||||||
1452 | } | ||||||
1453 | |||||||
1454 | /// Determine whether we allow overloading of the function | ||||||
1455 | /// PrevDecl with another declaration. | ||||||
1456 | /// | ||||||
1457 | /// This routine determines whether overloading is possible, not | ||||||
1458 | /// whether some new function is actually an overload. It will return | ||||||
1459 | /// true in C++ (where we can always provide overloads) or, as an | ||||||
1460 | /// extension, in C when the previous function is already an | ||||||
1461 | /// overloaded function declaration or has the "overloadable" | ||||||
1462 | /// attribute. | ||||||
1463 | static bool AllowOverloadingOfFunction(LookupResult &Previous, | ||||||
1464 | ASTContext &Context, | ||||||
1465 | const FunctionDecl *New) { | ||||||
1466 | if (Context.getLangOpts().CPlusPlus) | ||||||
1467 | return true; | ||||||
1468 | |||||||
1469 | if (Previous.getResultKind() == LookupResult::FoundOverloaded) | ||||||
1470 | return true; | ||||||
1471 | |||||||
1472 | return Previous.getResultKind() == LookupResult::Found && | ||||||
1473 | (Previous.getFoundDecl()->hasAttr<OverloadableAttr>() || | ||||||
1474 | New->hasAttr<OverloadableAttr>()); | ||||||
1475 | } | ||||||
1476 | |||||||
1477 | /// Add this decl to the scope shadowed decl chains. | ||||||
1478 | void Sema::PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext) { | ||||||
1479 | // Move up the scope chain until we find the nearest enclosing | ||||||
1480 | // non-transparent context. The declaration will be introduced into this | ||||||
1481 | // scope. | ||||||
1482 | while (S->getEntity() && S->getEntity()->isTransparentContext()) | ||||||
1483 | S = S->getParent(); | ||||||
1484 | |||||||
1485 | // Add scoped declarations into their context, so that they can be | ||||||
1486 | // found later. Declarations without a context won't be inserted | ||||||
1487 | // into any context. | ||||||
1488 | if (AddToContext) | ||||||
1489 | CurContext->addDecl(D); | ||||||
1490 | |||||||
1491 | // Out-of-line definitions shouldn't be pushed into scope in C++, unless they | ||||||
1492 | // are function-local declarations. | ||||||
1493 | if (getLangOpts().CPlusPlus && D->isOutOfLine() && !S->getFnParent()) | ||||||
1494 | return; | ||||||
1495 | |||||||
1496 | // Template instantiations should also not be pushed into scope. | ||||||
1497 | if (isa<FunctionDecl>(D) && | ||||||
1498 | cast<FunctionDecl>(D)->isFunctionTemplateSpecialization()) | ||||||
1499 | return; | ||||||
1500 | |||||||
1501 | // If this replaces anything in the current scope, | ||||||
1502 | IdentifierResolver::iterator I = IdResolver.begin(D->getDeclName()), | ||||||
1503 | IEnd = IdResolver.end(); | ||||||
1504 | for (; I != IEnd; ++I) { | ||||||
1505 | if (S->isDeclScope(*I) && D->declarationReplaces(*I)) { | ||||||
1506 | S->RemoveDecl(*I); | ||||||
1507 | IdResolver.RemoveDecl(*I); | ||||||
1508 | |||||||
1509 | // Should only need to replace one decl. | ||||||
1510 | break; | ||||||
1511 | } | ||||||
1512 | } | ||||||
1513 | |||||||
1514 | S->AddDecl(D); | ||||||
1515 | |||||||
1516 | if (isa<LabelDecl>(D) && !cast<LabelDecl>(D)->isGnuLocal()) { | ||||||
1517 | // Implicitly-generated labels may end up getting generated in an order that | ||||||
1518 | // isn't strictly lexical, which breaks name lookup. Be careful to insert | ||||||
1519 | // the label at the appropriate place in the identifier chain. | ||||||
1520 | for (I = IdResolver.begin(D->getDeclName()); I != IEnd; ++I) { | ||||||
1521 | DeclContext *IDC = (*I)->getLexicalDeclContext()->getRedeclContext(); | ||||||
1522 | if (IDC == CurContext) { | ||||||
1523 | if (!S->isDeclScope(*I)) | ||||||
1524 | continue; | ||||||
1525 | } else if (IDC->Encloses(CurContext)) | ||||||
1526 | break; | ||||||
1527 | } | ||||||
1528 | |||||||
1529 | IdResolver.InsertDeclAfter(I, D); | ||||||
1530 | } else { | ||||||
1531 | IdResolver.AddDecl(D); | ||||||
1532 | } | ||||||
1533 | warnOnReservedIdentifier(D); | ||||||
1534 | } | ||||||
1535 | |||||||
1536 | bool Sema::isDeclInScope(NamedDecl *D, DeclContext *Ctx, Scope *S, | ||||||
1537 | bool AllowInlineNamespace) { | ||||||
1538 | return IdResolver.isDeclInScope(D, Ctx, S, AllowInlineNamespace); | ||||||
1539 | } | ||||||
1540 | |||||||
1541 | Scope *Sema::getScopeForDeclContext(Scope *S, DeclContext *DC) { | ||||||
1542 | DeclContext *TargetDC = DC->getPrimaryContext(); | ||||||
1543 | do { | ||||||
1544 | if (DeclContext *ScopeDC = S->getEntity()) | ||||||
1545 | if (ScopeDC->getPrimaryContext() == TargetDC) | ||||||
1546 | return S; | ||||||
1547 | } while ((S = S->getParent())); | ||||||
1548 | |||||||
1549 | return nullptr; | ||||||
1550 | } | ||||||
1551 | |||||||
1552 | static bool isOutOfScopePreviousDeclaration(NamedDecl *, | ||||||
1553 | DeclContext*, | ||||||
1554 | ASTContext&); | ||||||
1555 | |||||||
1556 | /// Filters out lookup results that don't fall within the given scope | ||||||
1557 | /// as determined by isDeclInScope. | ||||||
1558 | void Sema::FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, | ||||||
1559 | bool ConsiderLinkage, | ||||||
1560 | bool AllowInlineNamespace) { | ||||||
1561 | LookupResult::Filter F = R.makeFilter(); | ||||||
1562 | while (F.hasNext()) { | ||||||
1563 | NamedDecl *D = F.next(); | ||||||
1564 | |||||||
1565 | if (isDeclInScope(D, Ctx, S, AllowInlineNamespace)) | ||||||
1566 | continue; | ||||||
1567 | |||||||
1568 | if (ConsiderLinkage && isOutOfScopePreviousDeclaration(D, Ctx, Context)) | ||||||
1569 | continue; | ||||||
1570 | |||||||
1571 | F.erase(); | ||||||
1572 | } | ||||||
1573 | |||||||
1574 | F.done(); | ||||||
1575 | } | ||||||
1576 | |||||||
1577 | /// We've determined that \p New is a redeclaration of \p Old. Check that they | ||||||
1578 | /// have compatible owning modules. | ||||||
1579 | bool Sema::CheckRedeclarationModuleOwnership(NamedDecl *New, NamedDecl *Old) { | ||||||
1580 | // FIXME: The Modules TS is not clear about how friend declarations are | ||||||
1581 | // to be treated. It's not meaningful to have different owning modules for | ||||||
1582 | // linkage in redeclarations of the same entity, so for now allow the | ||||||
1583 | // redeclaration and change the owning modules to match. | ||||||
1584 | if (New->getFriendObjectKind() && | ||||||
1585 | Old->getOwningModuleForLinkage() != New->getOwningModuleForLinkage()) { | ||||||
1586 | New->setLocalOwningModule(Old->getOwningModule()); | ||||||
1587 | makeMergedDefinitionVisible(New); | ||||||
1588 | return false; | ||||||
1589 | } | ||||||
1590 | |||||||
1591 | Module *NewM = New->getOwningModule(); | ||||||
1592 | Module *OldM = Old->getOwningModule(); | ||||||
1593 | |||||||
1594 | if (NewM && NewM->Kind == Module::PrivateModuleFragment) | ||||||
1595 | NewM = NewM->Parent; | ||||||
1596 | if (OldM && OldM->Kind == Module::PrivateModuleFragment) | ||||||
1597 | OldM = OldM->Parent; | ||||||
1598 | |||||||
1599 | if (NewM == OldM) | ||||||
1600 | return false; | ||||||
1601 | |||||||
1602 | bool NewIsModuleInterface = NewM && NewM->isModulePurview(); | ||||||
1603 | bool OldIsModuleInterface = OldM && OldM->isModulePurview(); | ||||||
1604 | if (NewIsModuleInterface || OldIsModuleInterface) { | ||||||
1605 | // C++ Modules TS [basic.def.odr] 6.2/6.7 [sic]: | ||||||
1606 | // if a declaration of D [...] appears in the purview of a module, all | ||||||
1607 | // other such declarations shall appear in the purview of the same module | ||||||
1608 | Diag(New->getLocation(), diag::err_mismatched_owning_module) | ||||||
1609 | << New | ||||||
1610 | << NewIsModuleInterface | ||||||
1611 | << (NewIsModuleInterface ? NewM->getFullModuleName() : "") | ||||||
1612 | << OldIsModuleInterface | ||||||
1613 | << (OldIsModuleInterface ? OldM->getFullModuleName() : ""); | ||||||
1614 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
1615 | New->setInvalidDecl(); | ||||||
1616 | return true; | ||||||
1617 | } | ||||||
1618 | |||||||
1619 | return false; | ||||||
1620 | } | ||||||
1621 | |||||||
1622 | static bool isUsingDecl(NamedDecl *D) { | ||||||
1623 | return isa<UsingShadowDecl>(D) || | ||||||
1624 | isa<UnresolvedUsingTypenameDecl>(D) || | ||||||
1625 | isa<UnresolvedUsingValueDecl>(D); | ||||||
1626 | } | ||||||
1627 | |||||||
1628 | /// Removes using shadow declarations from the lookup results. | ||||||
1629 | static void RemoveUsingDecls(LookupResult &R) { | ||||||
1630 | LookupResult::Filter F = R.makeFilter(); | ||||||
1631 | while (F.hasNext()) | ||||||
1632 | if (isUsingDecl(F.next())) | ||||||
1633 | F.erase(); | ||||||
1634 | |||||||
1635 | F.done(); | ||||||
1636 | } | ||||||
1637 | |||||||
1638 | /// Check for this common pattern: | ||||||
1639 | /// @code | ||||||
1640 | /// class S { | ||||||
1641 | /// S(const S&); // DO NOT IMPLEMENT | ||||||
1642 | /// void operator=(const S&); // DO NOT IMPLEMENT | ||||||
1643 | /// }; | ||||||
1644 | /// @endcode | ||||||
1645 | static bool IsDisallowedCopyOrAssign(const CXXMethodDecl *D) { | ||||||
1646 | // FIXME: Should check for private access too but access is set after we get | ||||||
1647 | // the decl here. | ||||||
1648 | if (D->doesThisDeclarationHaveABody()) | ||||||
1649 | return false; | ||||||
1650 | |||||||
1651 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) | ||||||
1652 | return CD->isCopyConstructor(); | ||||||
1653 | return D->isCopyAssignmentOperator(); | ||||||
1654 | } | ||||||
1655 | |||||||
1656 | // We need this to handle | ||||||
1657 | // | ||||||
1658 | // typedef struct { | ||||||
1659 | // void *foo() { return 0; } | ||||||
1660 | // } A; | ||||||
1661 | // | ||||||
1662 | // When we see foo we don't know if after the typedef we will get 'A' or '*A' | ||||||
1663 | // for example. If 'A', foo will have external linkage. If we have '*A', | ||||||
1664 | // foo will have no linkage. Since we can't know until we get to the end | ||||||
1665 | // of the typedef, this function finds out if D might have non-external linkage. | ||||||
1666 | // Callers should verify at the end of the TU if it D has external linkage or | ||||||
1667 | // not. | ||||||
1668 | bool Sema::mightHaveNonExternalLinkage(const DeclaratorDecl *D) { | ||||||
1669 | const DeclContext *DC = D->getDeclContext(); | ||||||
1670 | while (!DC->isTranslationUnit()) { | ||||||
1671 | if (const RecordDecl *RD = dyn_cast<RecordDecl>(DC)){ | ||||||
1672 | if (!RD->hasNameForLinkage()) | ||||||
1673 | return true; | ||||||
1674 | } | ||||||
1675 | DC = DC->getParent(); | ||||||
1676 | } | ||||||
1677 | |||||||
1678 | return !D->isExternallyVisible(); | ||||||
1679 | } | ||||||
1680 | |||||||
1681 | // FIXME: This needs to be refactored; some other isInMainFile users want | ||||||
1682 | // these semantics. | ||||||
1683 | static bool isMainFileLoc(const Sema &S, SourceLocation Loc) { | ||||||
1684 | if (S.TUKind != TU_Complete) | ||||||
1685 | return false; | ||||||
1686 | return S.SourceMgr.isInMainFile(Loc); | ||||||
1687 | } | ||||||
1688 | |||||||
1689 | bool Sema::ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const { | ||||||
1690 | assert(D)(static_cast <bool> (D) ? void (0) : __assert_fail ("D" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1690, __extension__ __PRETTY_FUNCTION__)); | ||||||
1691 | |||||||
1692 | if (D->isInvalidDecl() || D->isUsed() || D->hasAttr<UnusedAttr>()) | ||||||
1693 | return false; | ||||||
1694 | |||||||
1695 | // Ignore all entities declared within templates, and out-of-line definitions | ||||||
1696 | // of members of class templates. | ||||||
1697 | if (D->getDeclContext()->isDependentContext() || | ||||||
1698 | D->getLexicalDeclContext()->isDependentContext()) | ||||||
1699 | return false; | ||||||
1700 | |||||||
1701 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
1702 | if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) | ||||||
1703 | return false; | ||||||
1704 | // A non-out-of-line declaration of a member specialization was implicitly | ||||||
1705 | // instantiated; it's the out-of-line declaration that we're interested in. | ||||||
1706 | if (FD->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && | ||||||
1707 | FD->getMemberSpecializationInfo() && !FD->isOutOfLine()) | ||||||
1708 | return false; | ||||||
1709 | |||||||
1710 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||
1711 | if (MD->isVirtual() || IsDisallowedCopyOrAssign(MD)) | ||||||
1712 | return false; | ||||||
1713 | } else { | ||||||
1714 | // 'static inline' functions are defined in headers; don't warn. | ||||||
1715 | if (FD->isInlined() && !isMainFileLoc(*this, FD->getLocation())) | ||||||
1716 | return false; | ||||||
1717 | } | ||||||
1718 | |||||||
1719 | if (FD->doesThisDeclarationHaveABody() && | ||||||
1720 | Context.DeclMustBeEmitted(FD)) | ||||||
1721 | return false; | ||||||
1722 | } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1723 | // Constants and utility variables are defined in headers with internal | ||||||
1724 | // linkage; don't warn. (Unlike functions, there isn't a convenient marker | ||||||
1725 | // like "inline".) | ||||||
1726 | if (!isMainFileLoc(*this, VD->getLocation())) | ||||||
1727 | return false; | ||||||
1728 | |||||||
1729 | if (Context.DeclMustBeEmitted(VD)) | ||||||
1730 | return false; | ||||||
1731 | |||||||
1732 | if (VD->isStaticDataMember() && | ||||||
1733 | VD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) | ||||||
1734 | return false; | ||||||
1735 | if (VD->isStaticDataMember() && | ||||||
1736 | VD->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && | ||||||
1737 | VD->getMemberSpecializationInfo() && !VD->isOutOfLine()) | ||||||
1738 | return false; | ||||||
1739 | |||||||
1740 | if (VD->isInline() && !isMainFileLoc(*this, VD->getLocation())) | ||||||
1741 | return false; | ||||||
1742 | } else { | ||||||
1743 | return false; | ||||||
1744 | } | ||||||
1745 | |||||||
1746 | // Only warn for unused decls internal to the translation unit. | ||||||
1747 | // FIXME: This seems like a bogus check; it suppresses -Wunused-function | ||||||
1748 | // for inline functions defined in the main source file, for instance. | ||||||
1749 | return mightHaveNonExternalLinkage(D); | ||||||
1750 | } | ||||||
1751 | |||||||
1752 | void Sema::MarkUnusedFileScopedDecl(const DeclaratorDecl *D) { | ||||||
1753 | if (!D) | ||||||
1754 | return; | ||||||
1755 | |||||||
1756 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
1757 | const FunctionDecl *First = FD->getFirstDecl(); | ||||||
1758 | if (FD != First && ShouldWarnIfUnusedFileScopedDecl(First)) | ||||||
1759 | return; // First should already be in the vector. | ||||||
1760 | } | ||||||
1761 | |||||||
1762 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1763 | const VarDecl *First = VD->getFirstDecl(); | ||||||
1764 | if (VD != First && ShouldWarnIfUnusedFileScopedDecl(First)) | ||||||
1765 | return; // First should already be in the vector. | ||||||
1766 | } | ||||||
1767 | |||||||
1768 | if (ShouldWarnIfUnusedFileScopedDecl(D)) | ||||||
1769 | UnusedFileScopedDecls.push_back(D); | ||||||
1770 | } | ||||||
1771 | |||||||
1772 | static bool ShouldDiagnoseUnusedDecl(const NamedDecl *D) { | ||||||
1773 | if (D->isInvalidDecl()) | ||||||
1774 | return false; | ||||||
1775 | |||||||
1776 | if (auto *DD = dyn_cast<DecompositionDecl>(D)) { | ||||||
1777 | // For a decomposition declaration, warn if none of the bindings are | ||||||
1778 | // referenced, instead of if the variable itself is referenced (which | ||||||
1779 | // it is, by the bindings' expressions). | ||||||
1780 | for (auto *BD : DD->bindings()) | ||||||
1781 | if (BD->isReferenced()) | ||||||
1782 | return false; | ||||||
1783 | } else if (!D->getDeclName()) { | ||||||
1784 | return false; | ||||||
1785 | } else if (D->isReferenced() || D->isUsed()) { | ||||||
1786 | return false; | ||||||
1787 | } | ||||||
1788 | |||||||
1789 | if (D->hasAttr<UnusedAttr>() || D->hasAttr<ObjCPreciseLifetimeAttr>()) | ||||||
1790 | return false; | ||||||
1791 | |||||||
1792 | if (isa<LabelDecl>(D)) | ||||||
1793 | return true; | ||||||
1794 | |||||||
1795 | // Except for labels, we only care about unused decls that are local to | ||||||
1796 | // functions. | ||||||
1797 | bool WithinFunction = D->getDeclContext()->isFunctionOrMethod(); | ||||||
1798 | if (const auto *R = dyn_cast<CXXRecordDecl>(D->getDeclContext())) | ||||||
1799 | // For dependent types, the diagnostic is deferred. | ||||||
1800 | WithinFunction = | ||||||
1801 | WithinFunction || (R->isLocalClass() && !R->isDependentType()); | ||||||
1802 | if (!WithinFunction) | ||||||
1803 | return false; | ||||||
1804 | |||||||
1805 | if (isa<TypedefNameDecl>(D)) | ||||||
1806 | return true; | ||||||
1807 | |||||||
1808 | // White-list anything that isn't a local variable. | ||||||
1809 | if (!isa<VarDecl>(D) || isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D)) | ||||||
1810 | return false; | ||||||
1811 | |||||||
1812 | // Types of valid local variables should be complete, so this should succeed. | ||||||
1813 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1814 | |||||||
1815 | // White-list anything with an __attribute__((unused)) type. | ||||||
1816 | const auto *Ty = VD->getType().getTypePtr(); | ||||||
1817 | |||||||
1818 | // Only look at the outermost level of typedef. | ||||||
1819 | if (const TypedefType *TT = Ty->getAs<TypedefType>()) { | ||||||
1820 | if (TT->getDecl()->hasAttr<UnusedAttr>()) | ||||||
1821 | return false; | ||||||
1822 | } | ||||||
1823 | |||||||
1824 | // If we failed to complete the type for some reason, or if the type is | ||||||
1825 | // dependent, don't diagnose the variable. | ||||||
1826 | if (Ty->isIncompleteType() || Ty->isDependentType()) | ||||||
1827 | return false; | ||||||
1828 | |||||||
1829 | // Look at the element type to ensure that the warning behaviour is | ||||||
1830 | // consistent for both scalars and arrays. | ||||||
1831 | Ty = Ty->getBaseElementTypeUnsafe(); | ||||||
1832 | |||||||
1833 | if (const TagType *TT = Ty->getAs<TagType>()) { | ||||||
1834 | const TagDecl *Tag = TT->getDecl(); | ||||||
1835 | if (Tag->hasAttr<UnusedAttr>()) | ||||||
1836 | return false; | ||||||
1837 | |||||||
1838 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Tag)) { | ||||||
1839 | if (!RD->hasTrivialDestructor() && !RD->hasAttr<WarnUnusedAttr>()) | ||||||
1840 | return false; | ||||||
1841 | |||||||
1842 | if (const Expr *Init = VD->getInit()) { | ||||||
1843 | if (const ExprWithCleanups *Cleanups = | ||||||
1844 | dyn_cast<ExprWithCleanups>(Init)) | ||||||
1845 | Init = Cleanups->getSubExpr(); | ||||||
1846 | const CXXConstructExpr *Construct = | ||||||
1847 | dyn_cast<CXXConstructExpr>(Init); | ||||||
1848 | if (Construct && !Construct->isElidable()) { | ||||||
1849 | CXXConstructorDecl *CD = Construct->getConstructor(); | ||||||
1850 | if (!CD->isTrivial() && !RD->hasAttr<WarnUnusedAttr>() && | ||||||
1851 | (VD->getInit()->isValueDependent() || !VD->evaluateValue())) | ||||||
1852 | return false; | ||||||
1853 | } | ||||||
1854 | |||||||
1855 | // Suppress the warning if we don't know how this is constructed, and | ||||||
1856 | // it could possibly be non-trivial constructor. | ||||||
1857 | if (Init->isTypeDependent()) | ||||||
1858 | for (const CXXConstructorDecl *Ctor : RD->ctors()) | ||||||
1859 | if (!Ctor->isTrivial()) | ||||||
1860 | return false; | ||||||
1861 | } | ||||||
1862 | } | ||||||
1863 | } | ||||||
1864 | |||||||
1865 | // TODO: __attribute__((unused)) templates? | ||||||
1866 | } | ||||||
1867 | |||||||
1868 | return true; | ||||||
1869 | } | ||||||
1870 | |||||||
1871 | static void GenerateFixForUnusedDecl(const NamedDecl *D, ASTContext &Ctx, | ||||||
1872 | FixItHint &Hint) { | ||||||
1873 | if (isa<LabelDecl>(D)) { | ||||||
1874 | SourceLocation AfterColon = Lexer::findLocationAfterToken( | ||||||
1875 | D->getEndLoc(), tok::colon, Ctx.getSourceManager(), Ctx.getLangOpts(), | ||||||
1876 | true); | ||||||
1877 | if (AfterColon.isInvalid()) | ||||||
1878 | return; | ||||||
1879 | Hint = FixItHint::CreateRemoval( | ||||||
1880 | CharSourceRange::getCharRange(D->getBeginLoc(), AfterColon)); | ||||||
1881 | } | ||||||
1882 | } | ||||||
1883 | |||||||
1884 | void Sema::DiagnoseUnusedNestedTypedefs(const RecordDecl *D) { | ||||||
1885 | if (D->getTypeForDecl()->isDependentType()) | ||||||
1886 | return; | ||||||
1887 | |||||||
1888 | for (auto *TmpD : D->decls()) { | ||||||
1889 | if (const auto *T = dyn_cast<TypedefNameDecl>(TmpD)) | ||||||
1890 | DiagnoseUnusedDecl(T); | ||||||
1891 | else if(const auto *R = dyn_cast<RecordDecl>(TmpD)) | ||||||
1892 | DiagnoseUnusedNestedTypedefs(R); | ||||||
1893 | } | ||||||
1894 | } | ||||||
1895 | |||||||
1896 | /// DiagnoseUnusedDecl - Emit warnings about declarations that are not used | ||||||
1897 | /// unless they are marked attr(unused). | ||||||
1898 | void Sema::DiagnoseUnusedDecl(const NamedDecl *D) { | ||||||
1899 | if (!ShouldDiagnoseUnusedDecl(D)) | ||||||
1900 | return; | ||||||
1901 | |||||||
1902 | if (auto *TD = dyn_cast<TypedefNameDecl>(D)) { | ||||||
1903 | // typedefs can be referenced later on, so the diagnostics are emitted | ||||||
1904 | // at end-of-translation-unit. | ||||||
1905 | UnusedLocalTypedefNameCandidates.insert(TD); | ||||||
1906 | return; | ||||||
1907 | } | ||||||
1908 | |||||||
1909 | FixItHint Hint; | ||||||
1910 | GenerateFixForUnusedDecl(D, Context, Hint); | ||||||
1911 | |||||||
1912 | unsigned DiagID; | ||||||
1913 | if (isa<VarDecl>(D) && cast<VarDecl>(D)->isExceptionVariable()) | ||||||
1914 | DiagID = diag::warn_unused_exception_param; | ||||||
1915 | else if (isa<LabelDecl>(D)) | ||||||
1916 | DiagID = diag::warn_unused_label; | ||||||
1917 | else | ||||||
1918 | DiagID = diag::warn_unused_variable; | ||||||
1919 | |||||||
1920 | Diag(D->getLocation(), DiagID) << D << Hint; | ||||||
1921 | } | ||||||
1922 | |||||||
1923 | void Sema::DiagnoseUnusedButSetDecl(const VarDecl *VD) { | ||||||
1924 | // If it's not referenced, it can't be set. If it has the Cleanup attribute, | ||||||
1925 | // it's not really unused. | ||||||
1926 | if (!VD->isReferenced() || !VD->getDeclName() || VD->hasAttr<UnusedAttr>() || | ||||||
1927 | VD->hasAttr<CleanupAttr>()) | ||||||
1928 | return; | ||||||
1929 | |||||||
1930 | const auto *Ty = VD->getType().getTypePtr()->getBaseElementTypeUnsafe(); | ||||||
1931 | |||||||
1932 | if (Ty->isReferenceType() || Ty->isDependentType()) | ||||||
1933 | return; | ||||||
1934 | |||||||
1935 | if (const TagType *TT = Ty->getAs<TagType>()) { | ||||||
1936 | const TagDecl *Tag = TT->getDecl(); | ||||||
1937 | if (Tag->hasAttr<UnusedAttr>()) | ||||||
1938 | return; | ||||||
1939 | // In C++, don't warn for record types that don't have WarnUnusedAttr, to | ||||||
1940 | // mimic gcc's behavior. | ||||||
1941 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Tag)) { | ||||||
1942 | if (!RD->hasAttr<WarnUnusedAttr>()) | ||||||
1943 | return; | ||||||
1944 | } | ||||||
1945 | } | ||||||
1946 | |||||||
1947 | // Don't warn about __block Objective-C pointer variables, as they might | ||||||
1948 | // be assigned in the block but not used elsewhere for the purpose of lifetime | ||||||
1949 | // extension. | ||||||
1950 | if (VD->hasAttr<BlocksAttr>() && Ty->isObjCObjectPointerType()) | ||||||
1951 | return; | ||||||
1952 | |||||||
1953 | auto iter = RefsMinusAssignments.find(VD); | ||||||
1954 | if (iter == RefsMinusAssignments.end()) | ||||||
1955 | return; | ||||||
1956 | |||||||
1957 | assert(iter->getSecond() >= 0 &&(static_cast <bool> (iter->getSecond() >= 0 && "Found a negative number of references to a VarDecl") ? void (0) : __assert_fail ("iter->getSecond() >= 0 && \"Found a negative number of references to a VarDecl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1958, __extension__ __PRETTY_FUNCTION__)) | ||||||
1958 | "Found a negative number of references to a VarDecl")(static_cast <bool> (iter->getSecond() >= 0 && "Found a negative number of references to a VarDecl") ? void (0) : __assert_fail ("iter->getSecond() >= 0 && \"Found a negative number of references to a VarDecl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1958, __extension__ __PRETTY_FUNCTION__)); | ||||||
1959 | if (iter->getSecond() != 0) | ||||||
1960 | return; | ||||||
1961 | unsigned DiagID = isa<ParmVarDecl>(VD) ? diag::warn_unused_but_set_parameter | ||||||
1962 | : diag::warn_unused_but_set_variable; | ||||||
1963 | Diag(VD->getLocation(), DiagID) << VD; | ||||||
1964 | } | ||||||
1965 | |||||||
1966 | static void CheckPoppedLabel(LabelDecl *L, Sema &S) { | ||||||
1967 | // Verify that we have no forward references left. If so, there was a goto | ||||||
1968 | // or address of a label taken, but no definition of it. Label fwd | ||||||
1969 | // definitions are indicated with a null substmt which is also not a resolved | ||||||
1970 | // MS inline assembly label name. | ||||||
1971 | bool Diagnose = false; | ||||||
1972 | if (L->isMSAsmLabel()) | ||||||
1973 | Diagnose = !L->isResolvedMSAsmLabel(); | ||||||
1974 | else | ||||||
1975 | Diagnose = L->getStmt() == nullptr; | ||||||
1976 | if (Diagnose) | ||||||
1977 | S.Diag(L->getLocation(), diag::err_undeclared_label_use) << L; | ||||||
1978 | } | ||||||
1979 | |||||||
1980 | void Sema::ActOnPopScope(SourceLocation Loc, Scope *S) { | ||||||
1981 | S->mergeNRVOIntoParent(); | ||||||
1982 | |||||||
1983 | if (S->decl_empty()) return; | ||||||
1984 | assert((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) &&(static_cast <bool> ((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && "Scope shouldn't contain decls!" ) ? void (0) : __assert_fail ("(S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && \"Scope shouldn't contain decls!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1985, __extension__ __PRETTY_FUNCTION__)) | ||||||
1985 | "Scope shouldn't contain decls!")(static_cast <bool> ((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && "Scope shouldn't contain decls!" ) ? void (0) : __assert_fail ("(S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && \"Scope shouldn't contain decls!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1985, __extension__ __PRETTY_FUNCTION__)); | ||||||
1986 | |||||||
1987 | for (auto *TmpD : S->decls()) { | ||||||
1988 | assert(TmpD && "This decl didn't get pushed??")(static_cast <bool> (TmpD && "This decl didn't get pushed??" ) ? void (0) : __assert_fail ("TmpD && \"This decl didn't get pushed??\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1988, __extension__ __PRETTY_FUNCTION__)); | ||||||
1989 | |||||||
1990 | assert(isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?")(static_cast <bool> (isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?") ? void (0) : __assert_fail ("isa<NamedDecl>(TmpD) && \"Decl isn't NamedDecl?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 1990, __extension__ __PRETTY_FUNCTION__)); | ||||||
1991 | NamedDecl *D = cast<NamedDecl>(TmpD); | ||||||
1992 | |||||||
1993 | // Diagnose unused variables in this scope. | ||||||
1994 | if (!S->hasUnrecoverableErrorOccurred()) { | ||||||
1995 | DiagnoseUnusedDecl(D); | ||||||
1996 | if (const auto *RD = dyn_cast<RecordDecl>(D)) | ||||||
1997 | DiagnoseUnusedNestedTypedefs(RD); | ||||||
1998 | if (VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1999 | DiagnoseUnusedButSetDecl(VD); | ||||||
2000 | RefsMinusAssignments.erase(VD); | ||||||
2001 | } | ||||||
2002 | } | ||||||
2003 | |||||||
2004 | if (!D->getDeclName()) continue; | ||||||
2005 | |||||||
2006 | // If this was a forward reference to a label, verify it was defined. | ||||||
2007 | if (LabelDecl *LD = dyn_cast<LabelDecl>(D)) | ||||||
2008 | CheckPoppedLabel(LD, *this); | ||||||
2009 | |||||||
2010 | // Remove this name from our lexical scope, and warn on it if we haven't | ||||||
2011 | // already. | ||||||
2012 | IdResolver.RemoveDecl(D); | ||||||
2013 | auto ShadowI = ShadowingDecls.find(D); | ||||||
2014 | if (ShadowI != ShadowingDecls.end()) { | ||||||
2015 | if (const auto *FD = dyn_cast<FieldDecl>(ShadowI->second)) { | ||||||
2016 | Diag(D->getLocation(), diag::warn_ctor_parm_shadows_field) | ||||||
2017 | << D << FD << FD->getParent(); | ||||||
2018 | Diag(FD->getLocation(), diag::note_previous_declaration); | ||||||
2019 | } | ||||||
2020 | ShadowingDecls.erase(ShadowI); | ||||||
2021 | } | ||||||
2022 | } | ||||||
2023 | } | ||||||
2024 | |||||||
2025 | /// Look for an Objective-C class in the translation unit. | ||||||
2026 | /// | ||||||
2027 | /// \param Id The name of the Objective-C class we're looking for. If | ||||||
2028 | /// typo-correction fixes this name, the Id will be updated | ||||||
2029 | /// to the fixed name. | ||||||
2030 | /// | ||||||
2031 | /// \param IdLoc The location of the name in the translation unit. | ||||||
2032 | /// | ||||||
2033 | /// \param DoTypoCorrection If true, this routine will attempt typo correction | ||||||
2034 | /// if there is no class with the given name. | ||||||
2035 | /// | ||||||
2036 | /// \returns The declaration of the named Objective-C class, or NULL if the | ||||||
2037 | /// class could not be found. | ||||||
2038 | ObjCInterfaceDecl *Sema::getObjCInterfaceDecl(IdentifierInfo *&Id, | ||||||
2039 | SourceLocation IdLoc, | ||||||
2040 | bool DoTypoCorrection) { | ||||||
2041 | // The third "scope" argument is 0 since we aren't enabling lazy built-in | ||||||
2042 | // creation from this context. | ||||||
2043 | NamedDecl *IDecl = LookupSingleName(TUScope, Id, IdLoc, LookupOrdinaryName); | ||||||
2044 | |||||||
2045 | if (!IDecl && DoTypoCorrection) { | ||||||
2046 | // Perform typo correction at the given location, but only if we | ||||||
2047 | // find an Objective-C class name. | ||||||
2048 | DeclFilterCCC<ObjCInterfaceDecl> CCC{}; | ||||||
2049 | if (TypoCorrection C = | ||||||
2050 | CorrectTypo(DeclarationNameInfo(Id, IdLoc), LookupOrdinaryName, | ||||||
2051 | TUScope, nullptr, CCC, CTK_ErrorRecovery)) { | ||||||
2052 | diagnoseTypo(C, PDiag(diag::err_undef_interface_suggest) << Id); | ||||||
2053 | IDecl = C.getCorrectionDeclAs<ObjCInterfaceDecl>(); | ||||||
2054 | Id = IDecl->getIdentifier(); | ||||||
2055 | } | ||||||
2056 | } | ||||||
2057 | ObjCInterfaceDecl *Def = dyn_cast_or_null<ObjCInterfaceDecl>(IDecl); | ||||||
2058 | // This routine must always return a class definition, if any. | ||||||
2059 | if (Def && Def->getDefinition()) | ||||||
2060 | Def = Def->getDefinition(); | ||||||
2061 | return Def; | ||||||
2062 | } | ||||||
2063 | |||||||
2064 | /// getNonFieldDeclScope - Retrieves the innermost scope, starting | ||||||
2065 | /// from S, where a non-field would be declared. This routine copes | ||||||
2066 | /// with the difference between C and C++ scoping rules in structs and | ||||||
2067 | /// unions. For example, the following code is well-formed in C but | ||||||
2068 | /// ill-formed in C++: | ||||||
2069 | /// @code | ||||||
2070 | /// struct S6 { | ||||||
2071 | /// enum { BAR } e; | ||||||
2072 | /// }; | ||||||
2073 | /// | ||||||
2074 | /// void test_S6() { | ||||||
2075 | /// struct S6 a; | ||||||
2076 | /// a.e = BAR; | ||||||
2077 | /// } | ||||||
2078 | /// @endcode | ||||||
2079 | /// For the declaration of BAR, this routine will return a different | ||||||
2080 | /// scope. The scope S will be the scope of the unnamed enumeration | ||||||
2081 | /// within S6. In C++, this routine will return the scope associated | ||||||
2082 | /// with S6, because the enumeration's scope is a transparent | ||||||
2083 | /// context but structures can contain non-field names. In C, this | ||||||
2084 | /// routine will return the translation unit scope, since the | ||||||
2085 | /// enumeration's scope is a transparent context and structures cannot | ||||||
2086 | /// contain non-field names. | ||||||
2087 | Scope *Sema::getNonFieldDeclScope(Scope *S) { | ||||||
2088 | while (((S->getFlags() & Scope::DeclScope) == 0) || | ||||||
2089 | (S->getEntity() && S->getEntity()->isTransparentContext()) || | ||||||
2090 | (S->isClassScope() && !getLangOpts().CPlusPlus)) | ||||||
2091 | S = S->getParent(); | ||||||
2092 | return S; | ||||||
2093 | } | ||||||
2094 | |||||||
2095 | static StringRef getHeaderName(Builtin::Context &BuiltinInfo, unsigned ID, | ||||||
2096 | ASTContext::GetBuiltinTypeError Error) { | ||||||
2097 | switch (Error) { | ||||||
2098 | case ASTContext::GE_None: | ||||||
2099 | return ""; | ||||||
2100 | case ASTContext::GE_Missing_type: | ||||||
2101 | return BuiltinInfo.getHeaderName(ID); | ||||||
2102 | case ASTContext::GE_Missing_stdio: | ||||||
2103 | return "stdio.h"; | ||||||
2104 | case ASTContext::GE_Missing_setjmp: | ||||||
2105 | return "setjmp.h"; | ||||||
2106 | case ASTContext::GE_Missing_ucontext: | ||||||
2107 | return "ucontext.h"; | ||||||
2108 | } | ||||||
2109 | llvm_unreachable("unhandled error kind")::llvm::llvm_unreachable_internal("unhandled error kind", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 2109); | ||||||
2110 | } | ||||||
2111 | |||||||
2112 | FunctionDecl *Sema::CreateBuiltin(IdentifierInfo *II, QualType Type, | ||||||
2113 | unsigned ID, SourceLocation Loc) { | ||||||
2114 | DeclContext *Parent = Context.getTranslationUnitDecl(); | ||||||
2115 | |||||||
2116 | if (getLangOpts().CPlusPlus) { | ||||||
2117 | LinkageSpecDecl *CLinkageDecl = LinkageSpecDecl::Create( | ||||||
2118 | Context, Parent, Loc, Loc, LinkageSpecDecl::lang_c, false); | ||||||
2119 | CLinkageDecl->setImplicit(); | ||||||
2120 | Parent->addDecl(CLinkageDecl); | ||||||
2121 | Parent = CLinkageDecl; | ||||||
2122 | } | ||||||
2123 | |||||||
2124 | FunctionDecl *New = FunctionDecl::Create(Context, Parent, Loc, Loc, II, Type, | ||||||
2125 | /*TInfo=*/nullptr, SC_Extern, | ||||||
2126 | getCurFPFeatures().isFPConstrained(), | ||||||
2127 | false, Type->isFunctionProtoType()); | ||||||
2128 | New->setImplicit(); | ||||||
2129 | New->addAttr(BuiltinAttr::CreateImplicit(Context, ID)); | ||||||
2130 | |||||||
2131 | // Create Decl objects for each parameter, adding them to the | ||||||
2132 | // FunctionDecl. | ||||||
2133 | if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(Type)) { | ||||||
2134 | SmallVector<ParmVarDecl *, 16> Params; | ||||||
2135 | for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) { | ||||||
2136 | ParmVarDecl *parm = ParmVarDecl::Create( | ||||||
2137 | Context, New, SourceLocation(), SourceLocation(), nullptr, | ||||||
2138 | FT->getParamType(i), /*TInfo=*/nullptr, SC_None, nullptr); | ||||||
2139 | parm->setScopeInfo(0, i); | ||||||
2140 | Params.push_back(parm); | ||||||
2141 | } | ||||||
2142 | New->setParams(Params); | ||||||
2143 | } | ||||||
2144 | |||||||
2145 | AddKnownFunctionAttributes(New); | ||||||
2146 | return New; | ||||||
2147 | } | ||||||
2148 | |||||||
2149 | /// LazilyCreateBuiltin - The specified Builtin-ID was first used at | ||||||
2150 | /// file scope. lazily create a decl for it. ForRedeclaration is true | ||||||
2151 | /// if we're creating this built-in in anticipation of redeclaring the | ||||||
2152 | /// built-in. | ||||||
2153 | NamedDecl *Sema::LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, | ||||||
2154 | Scope *S, bool ForRedeclaration, | ||||||
2155 | SourceLocation Loc) { | ||||||
2156 | LookupNecessaryTypesForBuiltin(S, ID); | ||||||
2157 | |||||||
2158 | ASTContext::GetBuiltinTypeError Error; | ||||||
2159 | QualType R = Context.GetBuiltinType(ID, Error); | ||||||
2160 | if (Error) { | ||||||
2161 | if (!ForRedeclaration) | ||||||
2162 | return nullptr; | ||||||
2163 | |||||||
2164 | // If we have a builtin without an associated type we should not emit a | ||||||
2165 | // warning when we were not able to find a type for it. | ||||||
2166 | if (Error == ASTContext::GE_Missing_type || | ||||||
2167 | Context.BuiltinInfo.allowTypeMismatch(ID)) | ||||||
2168 | return nullptr; | ||||||
2169 | |||||||
2170 | // If we could not find a type for setjmp it is because the jmp_buf type was | ||||||
2171 | // not defined prior to the setjmp declaration. | ||||||
2172 | if (Error == ASTContext::GE_Missing_setjmp) { | ||||||
2173 | Diag(Loc, diag::warn_implicit_decl_no_jmp_buf) | ||||||
2174 | << Context.BuiltinInfo.getName(ID); | ||||||
2175 | return nullptr; | ||||||
2176 | } | ||||||
2177 | |||||||
2178 | // Generally, we emit a warning that the declaration requires the | ||||||
2179 | // appropriate header. | ||||||
2180 | Diag(Loc, diag::warn_implicit_decl_requires_sysheader) | ||||||
2181 | << getHeaderName(Context.BuiltinInfo, ID, Error) | ||||||
2182 | << Context.BuiltinInfo.getName(ID); | ||||||
2183 | return nullptr; | ||||||
2184 | } | ||||||
2185 | |||||||
2186 | if (!ForRedeclaration && | ||||||
2187 | (Context.BuiltinInfo.isPredefinedLibFunction(ID) || | ||||||
2188 | Context.BuiltinInfo.isHeaderDependentFunction(ID))) { | ||||||
2189 | Diag(Loc, diag::ext_implicit_lib_function_decl) | ||||||
2190 | << Context.BuiltinInfo.getName(ID) << R; | ||||||
2191 | if (const char *Header = Context.BuiltinInfo.getHeaderName(ID)) | ||||||
2192 | Diag(Loc, diag::note_include_header_or_declare) | ||||||
2193 | << Header << Context.BuiltinInfo.getName(ID); | ||||||
2194 | } | ||||||
2195 | |||||||
2196 | if (R.isNull()) | ||||||
2197 | return nullptr; | ||||||
2198 | |||||||
2199 | FunctionDecl *New = CreateBuiltin(II, R, ID, Loc); | ||||||
2200 | RegisterLocallyScopedExternCDecl(New, S); | ||||||
2201 | |||||||
2202 | // TUScope is the translation-unit scope to insert this function into. | ||||||
2203 | // FIXME: This is hideous. We need to teach PushOnScopeChains to | ||||||
2204 | // relate Scopes to DeclContexts, and probably eliminate CurContext | ||||||
2205 | // entirely, but we're not there yet. | ||||||
2206 | DeclContext *SavedContext = CurContext; | ||||||
2207 | CurContext = New->getDeclContext(); | ||||||
2208 | PushOnScopeChains(New, TUScope); | ||||||
2209 | CurContext = SavedContext; | ||||||
2210 | return New; | ||||||
2211 | } | ||||||
2212 | |||||||
2213 | /// Typedef declarations don't have linkage, but they still denote the same | ||||||
2214 | /// entity if their types are the same. | ||||||
2215 | /// FIXME: This is notionally doing the same thing as ASTReaderDecl's | ||||||
2216 | /// isSameEntity. | ||||||
2217 | static void filterNonConflictingPreviousTypedefDecls(Sema &S, | ||||||
2218 | TypedefNameDecl *Decl, | ||||||
2219 | LookupResult &Previous) { | ||||||
2220 | // This is only interesting when modules are enabled. | ||||||
2221 | if (!S.getLangOpts().Modules && !S.getLangOpts().ModulesLocalVisibility) | ||||||
2222 | return; | ||||||
2223 | |||||||
2224 | // Empty sets are uninteresting. | ||||||
2225 | if (Previous.empty()) | ||||||
2226 | return; | ||||||
2227 | |||||||
2228 | LookupResult::Filter Filter = Previous.makeFilter(); | ||||||
2229 | while (Filter.hasNext()) { | ||||||
2230 | NamedDecl *Old = Filter.next(); | ||||||
2231 | |||||||
2232 | // Non-hidden declarations are never ignored. | ||||||
2233 | if (S.isVisible(Old)) | ||||||
2234 | continue; | ||||||
2235 | |||||||
2236 | // Declarations of the same entity are not ignored, even if they have | ||||||
2237 | // different linkages. | ||||||
2238 | if (auto *OldTD = dyn_cast<TypedefNameDecl>(Old)) { | ||||||
2239 | if (S.Context.hasSameType(OldTD->getUnderlyingType(), | ||||||
2240 | Decl->getUnderlyingType())) | ||||||
2241 | continue; | ||||||
2242 | |||||||
2243 | // If both declarations give a tag declaration a typedef name for linkage | ||||||
2244 | // purposes, then they declare the same entity. | ||||||
2245 | if (OldTD->getAnonDeclWithTypedefName(/*AnyRedecl*/true) && | ||||||
2246 | Decl->getAnonDeclWithTypedefName()) | ||||||
2247 | continue; | ||||||
2248 | } | ||||||
2249 | |||||||
2250 | Filter.erase(); | ||||||
2251 | } | ||||||
2252 | |||||||
2253 | Filter.done(); | ||||||
2254 | } | ||||||
2255 | |||||||
2256 | bool Sema::isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New) { | ||||||
2257 | QualType OldType; | ||||||
2258 | if (TypedefNameDecl *OldTypedef = dyn_cast<TypedefNameDecl>(Old)) | ||||||
2259 | OldType = OldTypedef->getUnderlyingType(); | ||||||
2260 | else | ||||||
2261 | OldType = Context.getTypeDeclType(Old); | ||||||
2262 | QualType NewType = New->getUnderlyingType(); | ||||||
2263 | |||||||
2264 | if (NewType->isVariablyModifiedType()) { | ||||||
2265 | // Must not redefine a typedef with a variably-modified type. | ||||||
2266 | int Kind = isa<TypeAliasDecl>(Old) ? 1 : 0; | ||||||
2267 | Diag(New->getLocation(), diag::err_redefinition_variably_modified_typedef) | ||||||
2268 | << Kind << NewType; | ||||||
2269 | if (Old->getLocation().isValid()) | ||||||
2270 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2271 | New->setInvalidDecl(); | ||||||
2272 | return true; | ||||||
2273 | } | ||||||
2274 | |||||||
2275 | if (OldType != NewType && | ||||||
2276 | !OldType->isDependentType() && | ||||||
2277 | !NewType->isDependentType() && | ||||||
2278 | !Context.hasSameType(OldType, NewType)) { | ||||||
2279 | int Kind = isa<TypeAliasDecl>(Old) ? 1 : 0; | ||||||
2280 | Diag(New->getLocation(), diag::err_redefinition_different_typedef) | ||||||
2281 | << Kind << NewType << OldType; | ||||||
2282 | if (Old->getLocation().isValid()) | ||||||
2283 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2284 | New->setInvalidDecl(); | ||||||
2285 | return true; | ||||||
2286 | } | ||||||
2287 | return false; | ||||||
2288 | } | ||||||
2289 | |||||||
2290 | /// MergeTypedefNameDecl - We just parsed a typedef 'New' which has the | ||||||
2291 | /// same name and scope as a previous declaration 'Old'. Figure out | ||||||
2292 | /// how to resolve this situation, merging decls or emitting | ||||||
2293 | /// diagnostics as appropriate. If there was an error, set New to be invalid. | ||||||
2294 | /// | ||||||
2295 | void Sema::MergeTypedefNameDecl(Scope *S, TypedefNameDecl *New, | ||||||
2296 | LookupResult &OldDecls) { | ||||||
2297 | // If the new decl is known invalid already, don't bother doing any | ||||||
2298 | // merging checks. | ||||||
2299 | if (New->isInvalidDecl()) return; | ||||||
2300 | |||||||
2301 | // Allow multiple definitions for ObjC built-in typedefs. | ||||||
2302 | // FIXME: Verify the underlying types are equivalent! | ||||||
2303 | if (getLangOpts().ObjC) { | ||||||
2304 | const IdentifierInfo *TypeID = New->getIdentifier(); | ||||||
2305 | switch (TypeID->getLength()) { | ||||||
2306 | default: break; | ||||||
2307 | case 2: | ||||||
2308 | { | ||||||
2309 | if (!TypeID->isStr("id")) | ||||||
2310 | break; | ||||||
2311 | QualType T = New->getUnderlyingType(); | ||||||
2312 | if (!T->isPointerType()) | ||||||
2313 | break; | ||||||
2314 | if (!T->isVoidPointerType()) { | ||||||
2315 | QualType PT = T->castAs<PointerType>()->getPointeeType(); | ||||||
2316 | if (!PT->isStructureType()) | ||||||
2317 | break; | ||||||
2318 | } | ||||||
2319 | Context.setObjCIdRedefinitionType(T); | ||||||
2320 | // Install the built-in type for 'id', ignoring the current definition. | ||||||
2321 | New->setTypeForDecl(Context.getObjCIdType().getTypePtr()); | ||||||
2322 | return; | ||||||
2323 | } | ||||||
2324 | case 5: | ||||||
2325 | if (!TypeID->isStr("Class")) | ||||||
2326 | break; | ||||||
2327 | Context.setObjCClassRedefinitionType(New->getUnderlyingType()); | ||||||
2328 | // Install the built-in type for 'Class', ignoring the current definition. | ||||||
2329 | New->setTypeForDecl(Context.getObjCClassType().getTypePtr()); | ||||||
2330 | return; | ||||||
2331 | case 3: | ||||||
2332 | if (!TypeID->isStr("SEL")) | ||||||
2333 | break; | ||||||
2334 | Context.setObjCSelRedefinitionType(New->getUnderlyingType()); | ||||||
2335 | // Install the built-in type for 'SEL', ignoring the current definition. | ||||||
2336 | New->setTypeForDecl(Context.getObjCSelType().getTypePtr()); | ||||||
2337 | return; | ||||||
2338 | } | ||||||
2339 | // Fall through - the typedef name was not a builtin type. | ||||||
2340 | } | ||||||
2341 | |||||||
2342 | // Verify the old decl was also a type. | ||||||
2343 | TypeDecl *Old = OldDecls.getAsSingle<TypeDecl>(); | ||||||
2344 | if (!Old) { | ||||||
2345 | Diag(New->getLocation(), diag::err_redefinition_different_kind) | ||||||
2346 | << New->getDeclName(); | ||||||
2347 | |||||||
2348 | NamedDecl *OldD = OldDecls.getRepresentativeDecl(); | ||||||
2349 | if (OldD->getLocation().isValid()) | ||||||
2350 | notePreviousDefinition(OldD, New->getLocation()); | ||||||
2351 | |||||||
2352 | return New->setInvalidDecl(); | ||||||
2353 | } | ||||||
2354 | |||||||
2355 | // If the old declaration is invalid, just give up here. | ||||||
2356 | if (Old->isInvalidDecl()) | ||||||
2357 | return New->setInvalidDecl(); | ||||||
2358 | |||||||
2359 | if (auto *OldTD = dyn_cast<TypedefNameDecl>(Old)) { | ||||||
2360 | auto *OldTag = OldTD->getAnonDeclWithTypedefName(/*AnyRedecl*/true); | ||||||
2361 | auto *NewTag = New->getAnonDeclWithTypedefName(); | ||||||
2362 | NamedDecl *Hidden = nullptr; | ||||||
2363 | if (OldTag && NewTag && | ||||||
2364 | OldTag->getCanonicalDecl() != NewTag->getCanonicalDecl() && | ||||||
2365 | !hasVisibleDefinition(OldTag, &Hidden)) { | ||||||
2366 | // There is a definition of this tag, but it is not visible. Use it | ||||||
2367 | // instead of our tag. | ||||||
2368 | New->setTypeForDecl(OldTD->getTypeForDecl()); | ||||||
2369 | if (OldTD->isModed()) | ||||||
2370 | New->setModedTypeSourceInfo(OldTD->getTypeSourceInfo(), | ||||||
2371 | OldTD->getUnderlyingType()); | ||||||
2372 | else | ||||||
2373 | New->setTypeSourceInfo(OldTD->getTypeSourceInfo()); | ||||||
2374 | |||||||
2375 | // Make the old tag definition visible. | ||||||
2376 | makeMergedDefinitionVisible(Hidden); | ||||||
2377 | |||||||
2378 | // If this was an unscoped enumeration, yank all of its enumerators | ||||||
2379 | // out of the scope. | ||||||
2380 | if (isa<EnumDecl>(NewTag)) { | ||||||
2381 | Scope *EnumScope = getNonFieldDeclScope(S); | ||||||
2382 | for (auto *D : NewTag->decls()) { | ||||||
2383 | auto *ED = cast<EnumConstantDecl>(D); | ||||||
2384 | assert(EnumScope->isDeclScope(ED))(static_cast <bool> (EnumScope->isDeclScope(ED)) ? void (0) : __assert_fail ("EnumScope->isDeclScope(ED)", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 2384, __extension__ __PRETTY_FUNCTION__)); | ||||||
2385 | EnumScope->RemoveDecl(ED); | ||||||
2386 | IdResolver.RemoveDecl(ED); | ||||||
2387 | ED->getLexicalDeclContext()->removeDecl(ED); | ||||||
2388 | } | ||||||
2389 | } | ||||||
2390 | } | ||||||
2391 | } | ||||||
2392 | |||||||
2393 | // If the typedef types are not identical, reject them in all languages and | ||||||
2394 | // with any extensions enabled. | ||||||
2395 | if (isIncompatibleTypedef(Old, New)) | ||||||
2396 | return; | ||||||
2397 | |||||||
2398 | // The types match. Link up the redeclaration chain and merge attributes if | ||||||
2399 | // the old declaration was a typedef. | ||||||
2400 | if (TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Old)) { | ||||||
2401 | New->setPreviousDecl(Typedef); | ||||||
2402 | mergeDeclAttributes(New, Old); | ||||||
2403 | } | ||||||
2404 | |||||||
2405 | if (getLangOpts().MicrosoftExt) | ||||||
2406 | return; | ||||||
2407 | |||||||
2408 | if (getLangOpts().CPlusPlus) { | ||||||
2409 | // C++ [dcl.typedef]p2: | ||||||
2410 | // In a given non-class scope, a typedef specifier can be used to | ||||||
2411 | // redefine the name of any type declared in that scope to refer | ||||||
2412 | // to the type to which it already refers. | ||||||
2413 | if (!isa<CXXRecordDecl>(CurContext)) | ||||||
2414 | return; | ||||||
2415 | |||||||
2416 | // C++0x [dcl.typedef]p4: | ||||||
2417 | // In a given class scope, a typedef specifier can be used to redefine | ||||||
2418 | // any class-name declared in that scope that is not also a typedef-name | ||||||
2419 | // to refer to the type to which it already refers. | ||||||
2420 | // | ||||||
2421 | // This wording came in via DR424, which was a correction to the | ||||||
2422 | // wording in DR56, which accidentally banned code like: | ||||||
2423 | // | ||||||
2424 | // struct S { | ||||||
2425 | // typedef struct A { } A; | ||||||
2426 | // }; | ||||||
2427 | // | ||||||
2428 | // in the C++03 standard. We implement the C++0x semantics, which | ||||||
2429 | // allow the above but disallow | ||||||
2430 | // | ||||||
2431 | // struct S { | ||||||
2432 | // typedef int I; | ||||||
2433 | // typedef int I; | ||||||
2434 | // }; | ||||||
2435 | // | ||||||
2436 | // since that was the intent of DR56. | ||||||
2437 | if (!isa<TypedefNameDecl>(Old)) | ||||||
2438 | return; | ||||||
2439 | |||||||
2440 | Diag(New->getLocation(), diag::err_redefinition) | ||||||
2441 | << New->getDeclName(); | ||||||
2442 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2443 | return New->setInvalidDecl(); | ||||||
2444 | } | ||||||
2445 | |||||||
2446 | // Modules always permit redefinition of typedefs, as does C11. | ||||||
2447 | if (getLangOpts().Modules || getLangOpts().C11) | ||||||
2448 | return; | ||||||
2449 | |||||||
2450 | // If we have a redefinition of a typedef in C, emit a warning. This warning | ||||||
2451 | // is normally mapped to an error, but can be controlled with | ||||||
2452 | // -Wtypedef-redefinition. If either the original or the redefinition is | ||||||
2453 | // in a system header, don't emit this for compatibility with GCC. | ||||||
2454 | if (getDiagnostics().getSuppressSystemWarnings() && | ||||||
2455 | // Some standard types are defined implicitly in Clang (e.g. OpenCL). | ||||||
2456 | (Old->isImplicit() || | ||||||
2457 | Context.getSourceManager().isInSystemHeader(Old->getLocation()) || | ||||||
2458 | Context.getSourceManager().isInSystemHeader(New->getLocation()))) | ||||||
2459 | return; | ||||||
2460 | |||||||
2461 | Diag(New->getLocation(), diag::ext_redefinition_of_typedef) | ||||||
2462 | << New->getDeclName(); | ||||||
2463 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2464 | } | ||||||
2465 | |||||||
2466 | /// DeclhasAttr - returns true if decl Declaration already has the target | ||||||
2467 | /// attribute. | ||||||
2468 | static bool DeclHasAttr(const Decl *D, const Attr *A) { | ||||||
2469 | const OwnershipAttr *OA = dyn_cast<OwnershipAttr>(A); | ||||||
2470 | const AnnotateAttr *Ann = dyn_cast<AnnotateAttr>(A); | ||||||
2471 | for (const auto *i : D->attrs()) | ||||||
2472 | if (i->getKind() == A->getKind()) { | ||||||
2473 | if (Ann) { | ||||||
2474 | if (Ann->getAnnotation() == cast<AnnotateAttr>(i)->getAnnotation()) | ||||||
2475 | return true; | ||||||
2476 | continue; | ||||||
2477 | } | ||||||
2478 | // FIXME: Don't hardcode this check | ||||||
2479 | if (OA && isa<OwnershipAttr>(i)) | ||||||
2480 | return OA->getOwnKind() == cast<OwnershipAttr>(i)->getOwnKind(); | ||||||
2481 | return true; | ||||||
2482 | } | ||||||
2483 | |||||||
2484 | return false; | ||||||
2485 | } | ||||||
2486 | |||||||
2487 | static bool isAttributeTargetADefinition(Decl *D) { | ||||||
2488 | if (VarDecl *VD = dyn_cast<VarDecl>(D)) | ||||||
2489 | return VD->isThisDeclarationADefinition(); | ||||||
2490 | if (TagDecl *TD = dyn_cast<TagDecl>(D)) | ||||||
2491 | return TD->isCompleteDefinition() || TD->isBeingDefined(); | ||||||
2492 | return true; | ||||||
2493 | } | ||||||
2494 | |||||||
2495 | /// Merge alignment attributes from \p Old to \p New, taking into account the | ||||||
2496 | /// special semantics of C11's _Alignas specifier and C++11's alignas attribute. | ||||||
2497 | /// | ||||||
2498 | /// \return \c true if any attributes were added to \p New. | ||||||
2499 | static bool mergeAlignedAttrs(Sema &S, NamedDecl *New, Decl *Old) { | ||||||
2500 | // Look for alignas attributes on Old, and pick out whichever attribute | ||||||
2501 | // specifies the strictest alignment requirement. | ||||||
2502 | AlignedAttr *OldAlignasAttr = nullptr; | ||||||
2503 | AlignedAttr *OldStrictestAlignAttr = nullptr; | ||||||
2504 | unsigned OldAlign = 0; | ||||||
2505 | for (auto *I : Old->specific_attrs<AlignedAttr>()) { | ||||||
2506 | // FIXME: We have no way of representing inherited dependent alignments | ||||||
2507 | // in a case like: | ||||||
2508 | // template<int A, int B> struct alignas(A) X; | ||||||
2509 | // template<int A, int B> struct alignas(B) X {}; | ||||||
2510 | // For now, we just ignore any alignas attributes which are not on the | ||||||
2511 | // definition in such a case. | ||||||
2512 | if (I->isAlignmentDependent()) | ||||||
2513 | return false; | ||||||
2514 | |||||||
2515 | if (I->isAlignas()) | ||||||
2516 | OldAlignasAttr = I; | ||||||
2517 | |||||||
2518 | unsigned Align = I->getAlignment(S.Context); | ||||||
2519 | if (Align > OldAlign) { | ||||||
2520 | OldAlign = Align; | ||||||
2521 | OldStrictestAlignAttr = I; | ||||||
2522 | } | ||||||
2523 | } | ||||||
2524 | |||||||
2525 | // Look for alignas attributes on New. | ||||||
2526 | AlignedAttr *NewAlignasAttr = nullptr; | ||||||
2527 | unsigned NewAlign = 0; | ||||||
2528 | for (auto *I : New->specific_attrs<AlignedAttr>()) { | ||||||
2529 | if (I->isAlignmentDependent()) | ||||||
2530 | return false; | ||||||
2531 | |||||||
2532 | if (I->isAlignas()) | ||||||
2533 | NewAlignasAttr = I; | ||||||
2534 | |||||||
2535 | unsigned Align = I->getAlignment(S.Context); | ||||||
2536 | if (Align > NewAlign) | ||||||
2537 | NewAlign = Align; | ||||||
2538 | } | ||||||
2539 | |||||||
2540 | if (OldAlignasAttr && NewAlignasAttr && OldAlign != NewAlign) { | ||||||
2541 | // Both declarations have 'alignas' attributes. We require them to match. | ||||||
2542 | // C++11 [dcl.align]p6 and C11 6.7.5/7 both come close to saying this, but | ||||||
2543 | // fall short. (If two declarations both have alignas, they must both match | ||||||
2544 | // every definition, and so must match each other if there is a definition.) | ||||||
2545 | |||||||
2546 | // If either declaration only contains 'alignas(0)' specifiers, then it | ||||||
2547 | // specifies the natural alignment for the type. | ||||||
2548 | if (OldAlign == 0 || NewAlign == 0) { | ||||||
2549 | QualType Ty; | ||||||
2550 | if (ValueDecl *VD = dyn_cast<ValueDecl>(New)) | ||||||
2551 | Ty = VD->getType(); | ||||||
2552 | else | ||||||
2553 | Ty = S.Context.getTagDeclType(cast<TagDecl>(New)); | ||||||
2554 | |||||||
2555 | if (OldAlign == 0) | ||||||
2556 | OldAlign = S.Context.getTypeAlign(Ty); | ||||||
2557 | if (NewAlign == 0) | ||||||
2558 | NewAlign = S.Context.getTypeAlign(Ty); | ||||||
2559 | } | ||||||
2560 | |||||||
2561 | if (OldAlign != NewAlign) { | ||||||
2562 | S.Diag(NewAlignasAttr->getLocation(), diag::err_alignas_mismatch) | ||||||
2563 | << (unsigned)S.Context.toCharUnitsFromBits(OldAlign).getQuantity() | ||||||
2564 | << (unsigned)S.Context.toCharUnitsFromBits(NewAlign).getQuantity(); | ||||||
2565 | S.Diag(OldAlignasAttr->getLocation(), diag::note_previous_declaration); | ||||||
2566 | } | ||||||
2567 | } | ||||||
2568 | |||||||
2569 | if (OldAlignasAttr && !NewAlignasAttr && isAttributeTargetADefinition(New)) { | ||||||
2570 | // C++11 [dcl.align]p6: | ||||||
2571 | // if any declaration of an entity has an alignment-specifier, | ||||||
2572 | // every defining declaration of that entity shall specify an | ||||||
2573 | // equivalent alignment. | ||||||
2574 | // C11 6.7.5/7: | ||||||
2575 | // If the definition of an object does not have an alignment | ||||||
2576 | // specifier, any other declaration of that object shall also | ||||||
2577 | // have no alignment specifier. | ||||||
2578 | S.Diag(New->getLocation(), diag::err_alignas_missing_on_definition) | ||||||
2579 | << OldAlignasAttr; | ||||||
2580 | S.Diag(OldAlignasAttr->getLocation(), diag::note_alignas_on_declaration) | ||||||
2581 | << OldAlignasAttr; | ||||||
2582 | } | ||||||
2583 | |||||||
2584 | bool AnyAdded = false; | ||||||
2585 | |||||||
2586 | // Ensure we have an attribute representing the strictest alignment. | ||||||
2587 | if (OldAlign > NewAlign) { | ||||||
2588 | AlignedAttr *Clone = OldStrictestAlignAttr->clone(S.Context); | ||||||
2589 | Clone->setInherited(true); | ||||||
2590 | New->addAttr(Clone); | ||||||
2591 | AnyAdded = true; | ||||||
2592 | } | ||||||
2593 | |||||||
2594 | // Ensure we have an alignas attribute if the old declaration had one. | ||||||
2595 | if (OldAlignasAttr && !NewAlignasAttr && | ||||||
2596 | !(AnyAdded && OldStrictestAlignAttr->isAlignas())) { | ||||||
2597 | AlignedAttr *Clone = OldAlignasAttr->clone(S.Context); | ||||||
2598 | Clone->setInherited(true); | ||||||
2599 | New->addAttr(Clone); | ||||||
2600 | AnyAdded = true; | ||||||
2601 | } | ||||||
2602 | |||||||
2603 | return AnyAdded; | ||||||
2604 | } | ||||||
2605 | |||||||
2606 | #define WANT_DECL_MERGE_LOGIC | ||||||
2607 | #include "clang/Sema/AttrParsedAttrImpl.inc" | ||||||
2608 | #undef WANT_DECL_MERGE_LOGIC | ||||||
2609 | |||||||
2610 | static bool mergeDeclAttribute(Sema &S, NamedDecl *D, | ||||||
2611 | const InheritableAttr *Attr, | ||||||
2612 | Sema::AvailabilityMergeKind AMK) { | ||||||
2613 | // Diagnose any mutual exclusions between the attribute that we want to add | ||||||
2614 | // and attributes that already exist on the declaration. | ||||||
2615 | if (!DiagnoseMutualExclusions(S, D, Attr)) | ||||||
2616 | return false; | ||||||
2617 | |||||||
2618 | // This function copies an attribute Attr from a previous declaration to the | ||||||
2619 | // new declaration D if the new declaration doesn't itself have that attribute | ||||||
2620 | // yet or if that attribute allows duplicates. | ||||||
2621 | // If you're adding a new attribute that requires logic different from | ||||||
2622 | // "use explicit attribute on decl if present, else use attribute from | ||||||
2623 | // previous decl", for example if the attribute needs to be consistent | ||||||
2624 | // between redeclarations, you need to call a custom merge function here. | ||||||
2625 | InheritableAttr *NewAttr = nullptr; | ||||||
2626 | if (const auto *AA = dyn_cast<AvailabilityAttr>(Attr)) | ||||||
2627 | NewAttr = S.mergeAvailabilityAttr( | ||||||
2628 | D, *AA, AA->getPlatform(), AA->isImplicit(), AA->getIntroduced(), | ||||||
2629 | AA->getDeprecated(), AA->getObsoleted(), AA->getUnavailable(), | ||||||
2630 | AA->getMessage(), AA->getStrict(), AA->getReplacement(), AMK, | ||||||
2631 | AA->getPriority()); | ||||||
2632 | else if (const auto *VA = dyn_cast<VisibilityAttr>(Attr)) | ||||||
2633 | NewAttr = S.mergeVisibilityAttr(D, *VA, VA->getVisibility()); | ||||||
2634 | else if (const auto *VA = dyn_cast<TypeVisibilityAttr>(Attr)) | ||||||
2635 | NewAttr = S.mergeTypeVisibilityAttr(D, *VA, VA->getVisibility()); | ||||||
2636 | else if (const auto *ImportA = dyn_cast<DLLImportAttr>(Attr)) | ||||||
2637 | NewAttr = S.mergeDLLImportAttr(D, *ImportA); | ||||||
2638 | else if (const auto *ExportA = dyn_cast<DLLExportAttr>(Attr)) | ||||||
2639 | NewAttr = S.mergeDLLExportAttr(D, *ExportA); | ||||||
2640 | else if (const auto *EA = dyn_cast<ErrorAttr>(Attr)) | ||||||
2641 | NewAttr = S.mergeErrorAttr(D, *EA, EA->getUserDiagnostic()); | ||||||
2642 | else if (const auto *FA = dyn_cast<FormatAttr>(Attr)) | ||||||
2643 | NewAttr = S.mergeFormatAttr(D, *FA, FA->getType(), FA->getFormatIdx(), | ||||||
2644 | FA->getFirstArg()); | ||||||
2645 | else if (const auto *SA = dyn_cast<SectionAttr>(Attr)) | ||||||
2646 | NewAttr = S.mergeSectionAttr(D, *SA, SA->getName()); | ||||||
2647 | else if (const auto *CSA = dyn_cast<CodeSegAttr>(Attr)) | ||||||
2648 | NewAttr = S.mergeCodeSegAttr(D, *CSA, CSA->getName()); | ||||||
2649 | else if (const auto *IA = dyn_cast<MSInheritanceAttr>(Attr)) | ||||||
2650 | NewAttr = S.mergeMSInheritanceAttr(D, *IA, IA->getBestCase(), | ||||||
2651 | IA->getInheritanceModel()); | ||||||
2652 | else if (const auto *AA = dyn_cast<AlwaysInlineAttr>(Attr)) | ||||||
2653 | NewAttr = S.mergeAlwaysInlineAttr(D, *AA, | ||||||
2654 | &S.Context.Idents.get(AA->getSpelling())); | ||||||
2655 | else if (S.getLangOpts().CUDA && isa<FunctionDecl>(D) && | ||||||
2656 | (isa<CUDAHostAttr>(Attr) || isa<CUDADeviceAttr>(Attr) || | ||||||
2657 | isa<CUDAGlobalAttr>(Attr))) { | ||||||
2658 | // CUDA target attributes are part of function signature for | ||||||
2659 | // overloading purposes and must not be merged. | ||||||
2660 | return false; | ||||||
2661 | } else if (const auto *MA = dyn_cast<MinSizeAttr>(Attr)) | ||||||
2662 | NewAttr = S.mergeMinSizeAttr(D, *MA); | ||||||
2663 | else if (const auto *SNA = dyn_cast<SwiftNameAttr>(Attr)) | ||||||
2664 | NewAttr = S.mergeSwiftNameAttr(D, *SNA, SNA->getName()); | ||||||
2665 | else if (const auto *OA = dyn_cast<OptimizeNoneAttr>(Attr)) | ||||||
2666 | NewAttr = S.mergeOptimizeNoneAttr(D, *OA); | ||||||
2667 | else if (const auto *InternalLinkageA = dyn_cast<InternalLinkageAttr>(Attr)) | ||||||
2668 | NewAttr = S.mergeInternalLinkageAttr(D, *InternalLinkageA); | ||||||
2669 | else if (isa<AlignedAttr>(Attr)) | ||||||
2670 | // AlignedAttrs are handled separately, because we need to handle all | ||||||
2671 | // such attributes on a declaration at the same time. | ||||||
2672 | NewAttr = nullptr; | ||||||
2673 | else if ((isa<DeprecatedAttr>(Attr) || isa<UnavailableAttr>(Attr)) && | ||||||
2674 | (AMK == Sema::AMK_Override || | ||||||
2675 | AMK == Sema::AMK_ProtocolImplementation || | ||||||
2676 | AMK == Sema::AMK_OptionalProtocolImplementation)) | ||||||
2677 | NewAttr = nullptr; | ||||||
2678 | else if (const auto *UA = dyn_cast<UuidAttr>(Attr)) | ||||||
2679 | NewAttr = S.mergeUuidAttr(D, *UA, UA->getGuid(), UA->getGuidDecl()); | ||||||
2680 | else if (const auto *IMA = dyn_cast<WebAssemblyImportModuleAttr>(Attr)) | ||||||
2681 | NewAttr = S.mergeImportModuleAttr(D, *IMA); | ||||||
2682 | else if (const auto *INA = dyn_cast<WebAssemblyImportNameAttr>(Attr)) | ||||||
2683 | NewAttr = S.mergeImportNameAttr(D, *INA); | ||||||
2684 | else if (const auto *TCBA = dyn_cast<EnforceTCBAttr>(Attr)) | ||||||
2685 | NewAttr = S.mergeEnforceTCBAttr(D, *TCBA); | ||||||
2686 | else if (const auto *TCBLA = dyn_cast<EnforceTCBLeafAttr>(Attr)) | ||||||
2687 | NewAttr = S.mergeEnforceTCBLeafAttr(D, *TCBLA); | ||||||
2688 | else if (const auto *BTFA = dyn_cast<BTFDeclTagAttr>(Attr)) | ||||||
2689 | NewAttr = S.mergeBTFDeclTagAttr(D, *BTFA); | ||||||
2690 | else if (Attr->shouldInheritEvenIfAlreadyPresent() || !DeclHasAttr(D, Attr)) | ||||||
2691 | NewAttr = cast<InheritableAttr>(Attr->clone(S.Context)); | ||||||
2692 | |||||||
2693 | if (NewAttr) { | ||||||
2694 | NewAttr->setInherited(true); | ||||||
2695 | D->addAttr(NewAttr); | ||||||
2696 | if (isa<MSInheritanceAttr>(NewAttr)) | ||||||
2697 | S.Consumer.AssignInheritanceModel(cast<CXXRecordDecl>(D)); | ||||||
2698 | return true; | ||||||
2699 | } | ||||||
2700 | |||||||
2701 | return false; | ||||||
2702 | } | ||||||
2703 | |||||||
2704 | static const NamedDecl *getDefinition(const Decl *D) { | ||||||
2705 | if (const TagDecl *TD = dyn_cast<TagDecl>(D)) | ||||||
2706 | return TD->getDefinition(); | ||||||
2707 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
2708 | const VarDecl *Def = VD->getDefinition(); | ||||||
2709 | if (Def) | ||||||
2710 | return Def; | ||||||
2711 | return VD->getActingDefinition(); | ||||||
2712 | } | ||||||
2713 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
2714 | const FunctionDecl *Def = nullptr; | ||||||
2715 | if (FD->isDefined(Def, true)) | ||||||
2716 | return Def; | ||||||
2717 | } | ||||||
2718 | return nullptr; | ||||||
2719 | } | ||||||
2720 | |||||||
2721 | static bool hasAttribute(const Decl *D, attr::Kind Kind) { | ||||||
2722 | for (const auto *Attribute : D->attrs()) | ||||||
2723 | if (Attribute->getKind() == Kind) | ||||||
2724 | return true; | ||||||
2725 | return false; | ||||||
2726 | } | ||||||
2727 | |||||||
2728 | /// checkNewAttributesAfterDef - If we already have a definition, check that | ||||||
2729 | /// there are no new attributes in this declaration. | ||||||
2730 | static void checkNewAttributesAfterDef(Sema &S, Decl *New, const Decl *Old) { | ||||||
2731 | if (!New->hasAttrs()) | ||||||
2732 | return; | ||||||
2733 | |||||||
2734 | const NamedDecl *Def = getDefinition(Old); | ||||||
2735 | if (!Def || Def == New) | ||||||
2736 | return; | ||||||
2737 | |||||||
2738 | AttrVec &NewAttributes = New->getAttrs(); | ||||||
2739 | for (unsigned I = 0, E = NewAttributes.size(); I != E;) { | ||||||
2740 | const Attr *NewAttribute = NewAttributes[I]; | ||||||
2741 | |||||||
2742 | if (isa<AliasAttr>(NewAttribute) || isa<IFuncAttr>(NewAttribute)) { | ||||||
2743 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(New)) { | ||||||
2744 | Sema::SkipBodyInfo SkipBody; | ||||||
2745 | S.CheckForFunctionRedefinition(FD, cast<FunctionDecl>(Def), &SkipBody); | ||||||
2746 | |||||||
2747 | // If we're skipping this definition, drop the "alias" attribute. | ||||||
2748 | if (SkipBody.ShouldSkip) { | ||||||
2749 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2750 | --E; | ||||||
2751 | continue; | ||||||
2752 | } | ||||||
2753 | } else { | ||||||
2754 | VarDecl *VD = cast<VarDecl>(New); | ||||||
2755 | unsigned Diag = cast<VarDecl>(Def)->isThisDeclarationADefinition() == | ||||||
2756 | VarDecl::TentativeDefinition | ||||||
2757 | ? diag::err_alias_after_tentative | ||||||
2758 | : diag::err_redefinition; | ||||||
2759 | S.Diag(VD->getLocation(), Diag) << VD->getDeclName(); | ||||||
2760 | if (Diag == diag::err_redefinition) | ||||||
2761 | S.notePreviousDefinition(Def, VD->getLocation()); | ||||||
2762 | else | ||||||
2763 | S.Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
2764 | VD->setInvalidDecl(); | ||||||
2765 | } | ||||||
2766 | ++I; | ||||||
2767 | continue; | ||||||
2768 | } | ||||||
2769 | |||||||
2770 | if (const VarDecl *VD = dyn_cast<VarDecl>(Def)) { | ||||||
2771 | // Tentative definitions are only interesting for the alias check above. | ||||||
2772 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition) { | ||||||
2773 | ++I; | ||||||
2774 | continue; | ||||||
2775 | } | ||||||
2776 | } | ||||||
2777 | |||||||
2778 | if (hasAttribute(Def, NewAttribute->getKind())) { | ||||||
2779 | ++I; | ||||||
2780 | continue; // regular attr merging will take care of validating this. | ||||||
2781 | } | ||||||
2782 | |||||||
2783 | if (isa<C11NoReturnAttr>(NewAttribute)) { | ||||||
2784 | // C's _Noreturn is allowed to be added to a function after it is defined. | ||||||
2785 | ++I; | ||||||
2786 | continue; | ||||||
2787 | } else if (isa<UuidAttr>(NewAttribute)) { | ||||||
2788 | // msvc will allow a subsequent definition to add an uuid to a class | ||||||
2789 | ++I; | ||||||
2790 | continue; | ||||||
2791 | } else if (const AlignedAttr *AA = dyn_cast<AlignedAttr>(NewAttribute)) { | ||||||
2792 | if (AA->isAlignas()) { | ||||||
2793 | // C++11 [dcl.align]p6: | ||||||
2794 | // if any declaration of an entity has an alignment-specifier, | ||||||
2795 | // every defining declaration of that entity shall specify an | ||||||
2796 | // equivalent alignment. | ||||||
2797 | // C11 6.7.5/7: | ||||||
2798 | // If the definition of an object does not have an alignment | ||||||
2799 | // specifier, any other declaration of that object shall also | ||||||
2800 | // have no alignment specifier. | ||||||
2801 | S.Diag(Def->getLocation(), diag::err_alignas_missing_on_definition) | ||||||
2802 | << AA; | ||||||
2803 | S.Diag(NewAttribute->getLocation(), diag::note_alignas_on_declaration) | ||||||
2804 | << AA; | ||||||
2805 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2806 | --E; | ||||||
2807 | continue; | ||||||
2808 | } | ||||||
2809 | } else if (isa<LoaderUninitializedAttr>(NewAttribute)) { | ||||||
2810 | // If there is a C definition followed by a redeclaration with this | ||||||
2811 | // attribute then there are two different definitions. In C++, prefer the | ||||||
2812 | // standard diagnostics. | ||||||
2813 | if (!S.getLangOpts().CPlusPlus) { | ||||||
2814 | S.Diag(NewAttribute->getLocation(), | ||||||
2815 | diag::err_loader_uninitialized_redeclaration); | ||||||
2816 | S.Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
2817 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2818 | --E; | ||||||
2819 | continue; | ||||||
2820 | } | ||||||
2821 | } else if (isa<SelectAnyAttr>(NewAttribute) && | ||||||
2822 | cast<VarDecl>(New)->isInline() && | ||||||
2823 | !cast<VarDecl>(New)->isInlineSpecified()) { | ||||||
2824 | // Don't warn about applying selectany to implicitly inline variables. | ||||||
2825 | // Older compilers and language modes would require the use of selectany | ||||||
2826 | // to make such variables inline, and it would have no effect if we | ||||||
2827 | // honored it. | ||||||
2828 | ++I; | ||||||
2829 | continue; | ||||||
2830 | } else if (isa<OMPDeclareVariantAttr>(NewAttribute)) { | ||||||
2831 | // We allow to add OMP[Begin]DeclareVariantAttr to be added to | ||||||
2832 | // declarations after defintions. | ||||||
2833 | ++I; | ||||||
2834 | continue; | ||||||
2835 | } | ||||||
2836 | |||||||
2837 | S.Diag(NewAttribute->getLocation(), | ||||||
2838 | diag::warn_attribute_precede_definition); | ||||||
2839 | S.Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
2840 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2841 | --E; | ||||||
2842 | } | ||||||
2843 | } | ||||||
2844 | |||||||
2845 | static void diagnoseMissingConstinit(Sema &S, const VarDecl *InitDecl, | ||||||
2846 | const ConstInitAttr *CIAttr, | ||||||
2847 | bool AttrBeforeInit) { | ||||||
2848 | SourceLocation InsertLoc = InitDecl->getInnerLocStart(); | ||||||
2849 | |||||||
2850 | // Figure out a good way to write this specifier on the old declaration. | ||||||
2851 | // FIXME: We should just use the spelling of CIAttr, but we don't preserve | ||||||
2852 | // enough of the attribute list spelling information to extract that without | ||||||
2853 | // heroics. | ||||||
2854 | std::string SuitableSpelling; | ||||||
2855 | if (S.getLangOpts().CPlusPlus20) | ||||||
2856 | SuitableSpelling = std::string( | ||||||
2857 | S.PP.getLastMacroWithSpelling(InsertLoc, {tok::kw_constinit})); | ||||||
2858 | if (SuitableSpelling.empty() && S.getLangOpts().CPlusPlus11) | ||||||
2859 | SuitableSpelling = std::string(S.PP.getLastMacroWithSpelling( | ||||||
2860 | InsertLoc, {tok::l_square, tok::l_square, | ||||||
2861 | S.PP.getIdentifierInfo("clang"), tok::coloncolon, | ||||||
2862 | S.PP.getIdentifierInfo("require_constant_initialization"), | ||||||
2863 | tok::r_square, tok::r_square})); | ||||||
2864 | if (SuitableSpelling.empty()) | ||||||
2865 | SuitableSpelling = std::string(S.PP.getLastMacroWithSpelling( | ||||||
2866 | InsertLoc, {tok::kw___attribute, tok::l_paren, tok::r_paren, | ||||||
2867 | S.PP.getIdentifierInfo("require_constant_initialization"), | ||||||
2868 | tok::r_paren, tok::r_paren})); | ||||||
2869 | if (SuitableSpelling.empty() && S.getLangOpts().CPlusPlus20) | ||||||
2870 | SuitableSpelling = "constinit"; | ||||||
2871 | if (SuitableSpelling.empty() && S.getLangOpts().CPlusPlus11) | ||||||
2872 | SuitableSpelling = "[[clang::require_constant_initialization]]"; | ||||||
2873 | if (SuitableSpelling.empty()) | ||||||
2874 | SuitableSpelling = "__attribute__((require_constant_initialization))"; | ||||||
2875 | SuitableSpelling += " "; | ||||||
2876 | |||||||
2877 | if (AttrBeforeInit) { | ||||||
2878 | // extern constinit int a; | ||||||
2879 | // int a = 0; // error (missing 'constinit'), accepted as extension | ||||||
2880 | assert(CIAttr->isConstinit() && "should not diagnose this for attribute")(static_cast <bool> (CIAttr->isConstinit() && "should not diagnose this for attribute") ? void (0) : __assert_fail ("CIAttr->isConstinit() && \"should not diagnose this for attribute\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 2880, __extension__ __PRETTY_FUNCTION__)); | ||||||
2881 | S.Diag(InitDecl->getLocation(), diag::ext_constinit_missing) | ||||||
2882 | << InitDecl << FixItHint::CreateInsertion(InsertLoc, SuitableSpelling); | ||||||
2883 | S.Diag(CIAttr->getLocation(), diag::note_constinit_specified_here); | ||||||
2884 | } else { | ||||||
2885 | // int a = 0; | ||||||
2886 | // constinit extern int a; // error (missing 'constinit') | ||||||
2887 | S.Diag(CIAttr->getLocation(), | ||||||
2888 | CIAttr->isConstinit() ? diag::err_constinit_added_too_late | ||||||
2889 | : diag::warn_require_const_init_added_too_late) | ||||||
2890 | << FixItHint::CreateRemoval(SourceRange(CIAttr->getLocation())); | ||||||
2891 | S.Diag(InitDecl->getLocation(), diag::note_constinit_missing_here) | ||||||
2892 | << CIAttr->isConstinit() | ||||||
2893 | << FixItHint::CreateInsertion(InsertLoc, SuitableSpelling); | ||||||
2894 | } | ||||||
2895 | } | ||||||
2896 | |||||||
2897 | /// mergeDeclAttributes - Copy attributes from the Old decl to the New one. | ||||||
2898 | void Sema::mergeDeclAttributes(NamedDecl *New, Decl *Old, | ||||||
2899 | AvailabilityMergeKind AMK) { | ||||||
2900 | if (UsedAttr *OldAttr = Old->getMostRecentDecl()->getAttr<UsedAttr>()) { | ||||||
2901 | UsedAttr *NewAttr = OldAttr->clone(Context); | ||||||
2902 | NewAttr->setInherited(true); | ||||||
2903 | New->addAttr(NewAttr); | ||||||
2904 | } | ||||||
2905 | if (RetainAttr *OldAttr = Old->getMostRecentDecl()->getAttr<RetainAttr>()) { | ||||||
2906 | RetainAttr *NewAttr = OldAttr->clone(Context); | ||||||
2907 | NewAttr->setInherited(true); | ||||||
2908 | New->addAttr(NewAttr); | ||||||
2909 | } | ||||||
2910 | |||||||
2911 | if (!Old->hasAttrs() && !New->hasAttrs()) | ||||||
2912 | return; | ||||||
2913 | |||||||
2914 | // [dcl.constinit]p1: | ||||||
2915 | // If the [constinit] specifier is applied to any declaration of a | ||||||
2916 | // variable, it shall be applied to the initializing declaration. | ||||||
2917 | const auto *OldConstInit = Old->getAttr<ConstInitAttr>(); | ||||||
2918 | const auto *NewConstInit = New->getAttr<ConstInitAttr>(); | ||||||
2919 | if (bool(OldConstInit) != bool(NewConstInit)) { | ||||||
2920 | const auto *OldVD = cast<VarDecl>(Old); | ||||||
2921 | auto *NewVD = cast<VarDecl>(New); | ||||||
2922 | |||||||
2923 | // Find the initializing declaration. Note that we might not have linked | ||||||
2924 | // the new declaration into the redeclaration chain yet. | ||||||
2925 | const VarDecl *InitDecl = OldVD->getInitializingDeclaration(); | ||||||
2926 | if (!InitDecl && | ||||||
2927 | (NewVD->hasInit() || NewVD->isThisDeclarationADefinition())) | ||||||
2928 | InitDecl = NewVD; | ||||||
2929 | |||||||
2930 | if (InitDecl == NewVD) { | ||||||
2931 | // This is the initializing declaration. If it would inherit 'constinit', | ||||||
2932 | // that's ill-formed. (Note that we do not apply this to the attribute | ||||||
2933 | // form). | ||||||
2934 | if (OldConstInit && OldConstInit->isConstinit()) | ||||||
2935 | diagnoseMissingConstinit(*this, NewVD, OldConstInit, | ||||||
2936 | /*AttrBeforeInit=*/true); | ||||||
2937 | } else if (NewConstInit) { | ||||||
2938 | // This is the first time we've been told that this declaration should | ||||||
2939 | // have a constant initializer. If we already saw the initializing | ||||||
2940 | // declaration, this is too late. | ||||||
2941 | if (InitDecl && InitDecl != NewVD) { | ||||||
2942 | diagnoseMissingConstinit(*this, InitDecl, NewConstInit, | ||||||
2943 | /*AttrBeforeInit=*/false); | ||||||
2944 | NewVD->dropAttr<ConstInitAttr>(); | ||||||
2945 | } | ||||||
2946 | } | ||||||
2947 | } | ||||||
2948 | |||||||
2949 | // Attributes declared post-definition are currently ignored. | ||||||
2950 | checkNewAttributesAfterDef(*this, New, Old); | ||||||
2951 | |||||||
2952 | if (AsmLabelAttr *NewA = New->getAttr<AsmLabelAttr>()) { | ||||||
2953 | if (AsmLabelAttr *OldA = Old->getAttr<AsmLabelAttr>()) { | ||||||
2954 | if (!OldA->isEquivalent(NewA)) { | ||||||
2955 | // This redeclaration changes __asm__ label. | ||||||
2956 | Diag(New->getLocation(), diag::err_different_asm_label); | ||||||
2957 | Diag(OldA->getLocation(), diag::note_previous_declaration); | ||||||
2958 | } | ||||||
2959 | } else if (Old->isUsed()) { | ||||||
2960 | // This redeclaration adds an __asm__ label to a declaration that has | ||||||
2961 | // already been ODR-used. | ||||||
2962 | Diag(New->getLocation(), diag::err_late_asm_label_name) | ||||||
2963 | << isa<FunctionDecl>(Old) << New->getAttr<AsmLabelAttr>()->getRange(); | ||||||
2964 | } | ||||||
2965 | } | ||||||
2966 | |||||||
2967 | // Re-declaration cannot add abi_tag's. | ||||||
2968 | if (const auto *NewAbiTagAttr = New->getAttr<AbiTagAttr>()) { | ||||||
2969 | if (const auto *OldAbiTagAttr = Old->getAttr<AbiTagAttr>()) { | ||||||
2970 | for (const auto &NewTag : NewAbiTagAttr->tags()) { | ||||||
2971 | if (!llvm::is_contained(OldAbiTagAttr->tags(), NewTag)) { | ||||||
2972 | Diag(NewAbiTagAttr->getLocation(), | ||||||
2973 | diag::err_new_abi_tag_on_redeclaration) | ||||||
2974 | << NewTag; | ||||||
2975 | Diag(OldAbiTagAttr->getLocation(), diag::note_previous_declaration); | ||||||
2976 | } | ||||||
2977 | } | ||||||
2978 | } else { | ||||||
2979 | Diag(NewAbiTagAttr->getLocation(), diag::err_abi_tag_on_redeclaration); | ||||||
2980 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
2981 | } | ||||||
2982 | } | ||||||
2983 | |||||||
2984 | // This redeclaration adds a section attribute. | ||||||
2985 | if (New->hasAttr<SectionAttr>() && !Old->hasAttr<SectionAttr>()) { | ||||||
2986 | if (auto *VD = dyn_cast<VarDecl>(New)) { | ||||||
2987 | if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) { | ||||||
2988 | Diag(New->getLocation(), diag::warn_attribute_section_on_redeclaration); | ||||||
2989 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
2990 | } | ||||||
2991 | } | ||||||
2992 | } | ||||||
2993 | |||||||
2994 | // Redeclaration adds code-seg attribute. | ||||||
2995 | const auto *NewCSA = New->getAttr<CodeSegAttr>(); | ||||||
2996 | if (NewCSA && !Old->hasAttr<CodeSegAttr>() && | ||||||
2997 | !NewCSA->isImplicit() && isa<CXXMethodDecl>(New)) { | ||||||
2998 | Diag(New->getLocation(), diag::warn_mismatched_section) | ||||||
2999 | << 0 /*codeseg*/; | ||||||
3000 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
3001 | } | ||||||
3002 | |||||||
3003 | if (!Old->hasAttrs()) | ||||||
3004 | return; | ||||||
3005 | |||||||
3006 | bool foundAny = New->hasAttrs(); | ||||||
3007 | |||||||
3008 | // Ensure that any moving of objects within the allocated map is done before | ||||||
3009 | // we process them. | ||||||
3010 | if (!foundAny) New->setAttrs(AttrVec()); | ||||||
3011 | |||||||
3012 | for (auto *I : Old->specific_attrs<InheritableAttr>()) { | ||||||
3013 | // Ignore deprecated/unavailable/availability attributes if requested. | ||||||
3014 | AvailabilityMergeKind LocalAMK = AMK_None; | ||||||
3015 | if (isa<DeprecatedAttr>(I) || | ||||||
3016 | isa<UnavailableAttr>(I) || | ||||||
3017 | isa<AvailabilityAttr>(I)) { | ||||||
3018 | switch (AMK) { | ||||||
3019 | case AMK_None: | ||||||
3020 | continue; | ||||||
3021 | |||||||
3022 | case AMK_Redeclaration: | ||||||
3023 | case AMK_Override: | ||||||
3024 | case AMK_ProtocolImplementation: | ||||||
3025 | case AMK_OptionalProtocolImplementation: | ||||||
3026 | LocalAMK = AMK; | ||||||
3027 | break; | ||||||
3028 | } | ||||||
3029 | } | ||||||
3030 | |||||||
3031 | // Already handled. | ||||||
3032 | if (isa<UsedAttr>(I) || isa<RetainAttr>(I)) | ||||||
3033 | continue; | ||||||
3034 | |||||||
3035 | if (mergeDeclAttribute(*this, New, I, LocalAMK)) | ||||||
3036 | foundAny = true; | ||||||
3037 | } | ||||||
3038 | |||||||
3039 | if (mergeAlignedAttrs(*this, New, Old)) | ||||||
3040 | foundAny = true; | ||||||
3041 | |||||||
3042 | if (!foundAny) New->dropAttrs(); | ||||||
3043 | } | ||||||
3044 | |||||||
3045 | /// mergeParamDeclAttributes - Copy attributes from the old parameter | ||||||
3046 | /// to the new one. | ||||||
3047 | static void mergeParamDeclAttributes(ParmVarDecl *newDecl, | ||||||
3048 | const ParmVarDecl *oldDecl, | ||||||
3049 | Sema &S) { | ||||||
3050 | // C++11 [dcl.attr.depend]p2: | ||||||
3051 | // The first declaration of a function shall specify the | ||||||
3052 | // carries_dependency attribute for its declarator-id if any declaration | ||||||
3053 | // of the function specifies the carries_dependency attribute. | ||||||
3054 | const CarriesDependencyAttr *CDA = newDecl->getAttr<CarriesDependencyAttr>(); | ||||||
3055 | if (CDA && !oldDecl->hasAttr<CarriesDependencyAttr>()) { | ||||||
3056 | S.Diag(CDA->getLocation(), | ||||||
3057 | diag::err_carries_dependency_missing_on_first_decl) << 1/*Param*/; | ||||||
3058 | // Find the first declaration of the parameter. | ||||||
3059 | // FIXME: Should we build redeclaration chains for function parameters? | ||||||
3060 | const FunctionDecl *FirstFD = | ||||||
3061 | cast<FunctionDecl>(oldDecl->getDeclContext())->getFirstDecl(); | ||||||
3062 | const ParmVarDecl *FirstVD = | ||||||
3063 | FirstFD->getParamDecl(oldDecl->getFunctionScopeIndex()); | ||||||
3064 | S.Diag(FirstVD->getLocation(), | ||||||
3065 | diag::note_carries_dependency_missing_first_decl) << 1/*Param*/; | ||||||
3066 | } | ||||||
3067 | |||||||
3068 | if (!oldDecl->hasAttrs()) | ||||||
3069 | return; | ||||||
3070 | |||||||
3071 | bool foundAny = newDecl->hasAttrs(); | ||||||
3072 | |||||||
3073 | // Ensure that any moving of objects within the allocated map is | ||||||
3074 | // done before we process them. | ||||||
3075 | if (!foundAny) newDecl->setAttrs(AttrVec()); | ||||||
3076 | |||||||
3077 | for (const auto *I : oldDecl->specific_attrs<InheritableParamAttr>()) { | ||||||
3078 | if (!DeclHasAttr(newDecl, I)) { | ||||||
3079 | InheritableAttr *newAttr = | ||||||
3080 | cast<InheritableParamAttr>(I->clone(S.Context)); | ||||||
3081 | newAttr->setInherited(true); | ||||||
3082 | newDecl->addAttr(newAttr); | ||||||
3083 | foundAny = true; | ||||||
3084 | } | ||||||
3085 | } | ||||||
3086 | |||||||
3087 | if (!foundAny) newDecl->dropAttrs(); | ||||||
3088 | } | ||||||
3089 | |||||||
3090 | static void mergeParamDeclTypes(ParmVarDecl *NewParam, | ||||||
3091 | const ParmVarDecl *OldParam, | ||||||
3092 | Sema &S) { | ||||||
3093 | if (auto Oldnullability = OldParam->getType()->getNullability(S.Context)) { | ||||||
3094 | if (auto Newnullability = NewParam->getType()->getNullability(S.Context)) { | ||||||
3095 | if (*Oldnullability != *Newnullability) { | ||||||
3096 | S.Diag(NewParam->getLocation(), diag::warn_mismatched_nullability_attr) | ||||||
3097 | << DiagNullabilityKind( | ||||||
3098 | *Newnullability, | ||||||
3099 | ((NewParam->getObjCDeclQualifier() & Decl::OBJC_TQ_CSNullability) | ||||||
3100 | != 0)) | ||||||
3101 | << DiagNullabilityKind( | ||||||
3102 | *Oldnullability, | ||||||
3103 | ((OldParam->getObjCDeclQualifier() & Decl::OBJC_TQ_CSNullability) | ||||||
3104 | != 0)); | ||||||
3105 | S.Diag(OldParam->getLocation(), diag::note_previous_declaration); | ||||||
3106 | } | ||||||
3107 | } else { | ||||||
3108 | QualType NewT = NewParam->getType(); | ||||||
3109 | NewT = S.Context.getAttributedType( | ||||||
3110 | AttributedType::getNullabilityAttrKind(*Oldnullability), | ||||||
3111 | NewT, NewT); | ||||||
3112 | NewParam->setType(NewT); | ||||||
3113 | } | ||||||
3114 | } | ||||||
3115 | } | ||||||
3116 | |||||||
3117 | namespace { | ||||||
3118 | |||||||
3119 | /// Used in MergeFunctionDecl to keep track of function parameters in | ||||||
3120 | /// C. | ||||||
3121 | struct GNUCompatibleParamWarning { | ||||||
3122 | ParmVarDecl *OldParm; | ||||||
3123 | ParmVarDecl *NewParm; | ||||||
3124 | QualType PromotedType; | ||||||
3125 | }; | ||||||
3126 | |||||||
3127 | } // end anonymous namespace | ||||||
3128 | |||||||
3129 | // Determine whether the previous declaration was a definition, implicit | ||||||
3130 | // declaration, or a declaration. | ||||||
3131 | template <typename T> | ||||||
3132 | static std::pair<diag::kind, SourceLocation> | ||||||
3133 | getNoteDiagForInvalidRedeclaration(const T *Old, const T *New) { | ||||||
3134 | diag::kind PrevDiag; | ||||||
3135 | SourceLocation OldLocation = Old->getLocation(); | ||||||
3136 | if (Old->isThisDeclarationADefinition()) | ||||||
3137 | PrevDiag = diag::note_previous_definition; | ||||||
3138 | else if (Old->isImplicit()) { | ||||||
3139 | PrevDiag = diag::note_previous_implicit_declaration; | ||||||
3140 | if (OldLocation.isInvalid()) | ||||||
3141 | OldLocation = New->getLocation(); | ||||||
3142 | } else | ||||||
3143 | PrevDiag = diag::note_previous_declaration; | ||||||
3144 | return std::make_pair(PrevDiag, OldLocation); | ||||||
3145 | } | ||||||
3146 | |||||||
3147 | /// canRedefineFunction - checks if a function can be redefined. Currently, | ||||||
3148 | /// only extern inline functions can be redefined, and even then only in | ||||||
3149 | /// GNU89 mode. | ||||||
3150 | static bool canRedefineFunction(const FunctionDecl *FD, | ||||||
3151 | const LangOptions& LangOpts) { | ||||||
3152 | return ((FD->hasAttr<GNUInlineAttr>() || LangOpts.GNUInline) && | ||||||
3153 | !LangOpts.CPlusPlus && | ||||||
3154 | FD->isInlineSpecified() && | ||||||
3155 | FD->getStorageClass() == SC_Extern); | ||||||
3156 | } | ||||||
3157 | |||||||
3158 | const AttributedType *Sema::getCallingConvAttributedType(QualType T) const { | ||||||
3159 | const AttributedType *AT = T->getAs<AttributedType>(); | ||||||
3160 | while (AT && !AT->isCallingConv()) | ||||||
3161 | AT = AT->getModifiedType()->getAs<AttributedType>(); | ||||||
3162 | return AT; | ||||||
3163 | } | ||||||
3164 | |||||||
3165 | template <typename T> | ||||||
3166 | static bool haveIncompatibleLanguageLinkages(const T *Old, const T *New) { | ||||||
3167 | const DeclContext *DC = Old->getDeclContext(); | ||||||
3168 | if (DC->isRecord()) | ||||||
3169 | return false; | ||||||
3170 | |||||||
3171 | LanguageLinkage OldLinkage = Old->getLanguageLinkage(); | ||||||
3172 | if (OldLinkage == CXXLanguageLinkage && New->isInExternCContext()) | ||||||
3173 | return true; | ||||||
3174 | if (OldLinkage == CLanguageLinkage && New->isInExternCXXContext()) | ||||||
3175 | return true; | ||||||
3176 | return false; | ||||||
3177 | } | ||||||
3178 | |||||||
3179 | template<typename T> static bool isExternC(T *D) { return D->isExternC(); } | ||||||
3180 | static bool isExternC(VarTemplateDecl *) { return false; } | ||||||
3181 | static bool isExternC(FunctionTemplateDecl *) { return false; } | ||||||
3182 | |||||||
3183 | /// Check whether a redeclaration of an entity introduced by a | ||||||
3184 | /// using-declaration is valid, given that we know it's not an overload | ||||||
3185 | /// (nor a hidden tag declaration). | ||||||
3186 | template<typename ExpectedDecl> | ||||||
3187 | static bool checkUsingShadowRedecl(Sema &S, UsingShadowDecl *OldS, | ||||||
3188 | ExpectedDecl *New) { | ||||||
3189 | // C++11 [basic.scope.declarative]p4: | ||||||
3190 | // Given a set of declarations in a single declarative region, each of | ||||||
3191 | // which specifies the same unqualified name, | ||||||
3192 | // -- they shall all refer to the same entity, or all refer to functions | ||||||
3193 | // and function templates; or | ||||||
3194 | // -- exactly one declaration shall declare a class name or enumeration | ||||||
3195 | // name that is not a typedef name and the other declarations shall all | ||||||
3196 | // refer to the same variable or enumerator, or all refer to functions | ||||||
3197 | // and function templates; in this case the class name or enumeration | ||||||
3198 | // name is hidden (3.3.10). | ||||||
3199 | |||||||
3200 | // C++11 [namespace.udecl]p14: | ||||||
3201 | // If a function declaration in namespace scope or block scope has the | ||||||
3202 | // same name and the same parameter-type-list as a function introduced | ||||||
3203 | // by a using-declaration, and the declarations do not declare the same | ||||||
3204 | // function, the program is ill-formed. | ||||||
3205 | |||||||
3206 | auto *Old = dyn_cast<ExpectedDecl>(OldS->getTargetDecl()); | ||||||
3207 | if (Old && | ||||||
3208 | !Old->getDeclContext()->getRedeclContext()->Equals( | ||||||
3209 | New->getDeclContext()->getRedeclContext()) && | ||||||
3210 | !(isExternC(Old) && isExternC(New))) | ||||||
3211 | Old = nullptr; | ||||||
3212 | |||||||
3213 | if (!Old) { | ||||||
3214 | S.Diag(New->getLocation(), diag::err_using_decl_conflict_reverse); | ||||||
3215 | S.Diag(OldS->getTargetDecl()->getLocation(), diag::note_using_decl_target); | ||||||
3216 | S.Diag(OldS->getIntroducer()->getLocation(), diag::note_using_decl) << 0; | ||||||
3217 | return true; | ||||||
3218 | } | ||||||
3219 | return false; | ||||||
3220 | } | ||||||
3221 | |||||||
3222 | static bool hasIdenticalPassObjectSizeAttrs(const FunctionDecl *A, | ||||||
3223 | const FunctionDecl *B) { | ||||||
3224 | assert(A->getNumParams() == B->getNumParams())(static_cast <bool> (A->getNumParams() == B->getNumParams ()) ? void (0) : __assert_fail ("A->getNumParams() == B->getNumParams()" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 3224, __extension__ __PRETTY_FUNCTION__)); | ||||||
3225 | |||||||
3226 | auto AttrEq = [](const ParmVarDecl *A, const ParmVarDecl *B) { | ||||||
3227 | const auto *AttrA = A->getAttr<PassObjectSizeAttr>(); | ||||||
3228 | const auto *AttrB = B->getAttr<PassObjectSizeAttr>(); | ||||||
3229 | if (AttrA == AttrB) | ||||||
3230 | return true; | ||||||
3231 | return AttrA && AttrB && AttrA->getType() == AttrB->getType() && | ||||||
3232 | AttrA->isDynamic() == AttrB->isDynamic(); | ||||||
3233 | }; | ||||||
3234 | |||||||
3235 | return std::equal(A->param_begin(), A->param_end(), B->param_begin(), AttrEq); | ||||||
3236 | } | ||||||
3237 | |||||||
3238 | /// If necessary, adjust the semantic declaration context for a qualified | ||||||
3239 | /// declaration to name the correct inline namespace within the qualifier. | ||||||
3240 | static void adjustDeclContextForDeclaratorDecl(DeclaratorDecl *NewD, | ||||||
3241 | DeclaratorDecl *OldD) { | ||||||
3242 | // The only case where we need to update the DeclContext is when | ||||||
3243 | // redeclaration lookup for a qualified name finds a declaration | ||||||
3244 | // in an inline namespace within the context named by the qualifier: | ||||||
3245 | // | ||||||
3246 | // inline namespace N { int f(); } | ||||||
3247 | // int ::f(); // Sema DC needs adjusting from :: to N::. | ||||||
3248 | // | ||||||
3249 | // For unqualified declarations, the semantic context *can* change | ||||||
3250 | // along the redeclaration chain (for local extern declarations, | ||||||
3251 | // extern "C" declarations, and friend declarations in particular). | ||||||
3252 | if (!NewD->getQualifier()) | ||||||
3253 | return; | ||||||
3254 | |||||||
3255 | // NewD is probably already in the right context. | ||||||
3256 | auto *NamedDC = NewD->getDeclContext()->getRedeclContext(); | ||||||
3257 | auto *SemaDC = OldD->getDeclContext()->getRedeclContext(); | ||||||
3258 | if (NamedDC->Equals(SemaDC)) | ||||||
3259 | return; | ||||||
3260 | |||||||
3261 | assert((NamedDC->InEnclosingNamespaceSetOf(SemaDC) ||(static_cast <bool> ((NamedDC->InEnclosingNamespaceSetOf (SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl ()) && "unexpected context for redeclaration") ? void (0) : __assert_fail ("(NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl()) && \"unexpected context for redeclaration\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 3263, __extension__ __PRETTY_FUNCTION__)) | ||||||
3262 | NewD->isInvalidDecl() || OldD->isInvalidDecl()) &&(static_cast <bool> ((NamedDC->InEnclosingNamespaceSetOf (SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl ()) && "unexpected context for redeclaration") ? void (0) : __assert_fail ("(NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl()) && \"unexpected context for redeclaration\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 3263, __extension__ __PRETTY_FUNCTION__)) | ||||||
3263 | "unexpected context for redeclaration")(static_cast <bool> ((NamedDC->InEnclosingNamespaceSetOf (SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl ()) && "unexpected context for redeclaration") ? void (0) : __assert_fail ("(NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl()) && \"unexpected context for redeclaration\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 3263, __extension__ __PRETTY_FUNCTION__)); | ||||||
3264 | |||||||
3265 | auto *LexDC = NewD->getLexicalDeclContext(); | ||||||
3266 | auto FixSemaDC = [=](NamedDecl *D) { | ||||||
3267 | if (!D) | ||||||
3268 | return; | ||||||
3269 | D->setDeclContext(SemaDC); | ||||||
3270 | D->setLexicalDeclContext(LexDC); | ||||||
3271 | }; | ||||||
3272 | |||||||
3273 | FixSemaDC(NewD); | ||||||
3274 | if (auto *FD = dyn_cast<FunctionDecl>(NewD)) | ||||||
3275 | FixSemaDC(FD->getDescribedFunctionTemplate()); | ||||||
3276 | else if (auto *VD = dyn_cast<VarDecl>(NewD)) | ||||||
3277 | FixSemaDC(VD->getDescribedVarTemplate()); | ||||||
3278 | } | ||||||
3279 | |||||||
3280 | /// MergeFunctionDecl - We just parsed a function 'New' from | ||||||
3281 | /// declarator D which has the same name and scope as a previous | ||||||
3282 | /// declaration 'Old'. Figure out how to resolve this situation, | ||||||
3283 | /// merging decls or emitting diagnostics as appropriate. | ||||||
3284 | /// | ||||||
3285 | /// In C++, New and Old must be declarations that are not | ||||||
3286 | /// overloaded. Use IsOverload to determine whether New and Old are | ||||||
3287 | /// overloaded, and to select the Old declaration that New should be | ||||||
3288 | /// merged with. | ||||||
3289 | /// | ||||||
3290 | /// Returns true if there was an error, false otherwise. | ||||||
3291 | bool Sema::MergeFunctionDecl(FunctionDecl *New, NamedDecl *&OldD, | ||||||
3292 | Scope *S, bool MergeTypeWithOld) { | ||||||
3293 | // Verify the old decl was also a function. | ||||||
3294 | FunctionDecl *Old = OldD->getAsFunction(); | ||||||
3295 | if (!Old) { | ||||||
3296 | if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(OldD)) { | ||||||
3297 | if (New->getFriendObjectKind()) { | ||||||
3298 | Diag(New->getLocation(), diag::err_using_decl_friend); | ||||||
3299 | Diag(Shadow->getTargetDecl()->getLocation(), | ||||||
3300 | diag::note_using_decl_target); | ||||||
3301 | Diag(Shadow->getIntroducer()->getLocation(), diag::note_using_decl) | ||||||
3302 | << 0; | ||||||
3303 | return true; | ||||||
3304 | } | ||||||
3305 | |||||||
3306 | // Check whether the two declarations might declare the same function or | ||||||
3307 | // function template. | ||||||
3308 | if (FunctionTemplateDecl *NewTemplate = | ||||||
3309 | New->getDescribedFunctionTemplate()) { | ||||||
3310 | if (checkUsingShadowRedecl<FunctionTemplateDecl>(*this, Shadow, | ||||||
3311 | NewTemplate)) | ||||||
3312 | return true; | ||||||
3313 | OldD = Old = cast<FunctionTemplateDecl>(Shadow->getTargetDecl()) | ||||||
3314 | ->getAsFunction(); | ||||||
3315 | } else { | ||||||
3316 | if (checkUsingShadowRedecl<FunctionDecl>(*this, Shadow, New)) | ||||||
3317 | return true; | ||||||
3318 | OldD = Old = cast<FunctionDecl>(Shadow->getTargetDecl()); | ||||||
3319 | } | ||||||
3320 | } else { | ||||||
3321 | Diag(New->getLocation(), diag::err_redefinition_different_kind) | ||||||
3322 | << New->getDeclName(); | ||||||
3323 | notePreviousDefinition(OldD, New->getLocation()); | ||||||
3324 | return true; | ||||||
3325 | } | ||||||
3326 | } | ||||||
3327 | |||||||
3328 | // If the old declaration was found in an inline namespace and the new | ||||||
3329 | // declaration was qualified, update the DeclContext to match. | ||||||
3330 | adjustDeclContextForDeclaratorDecl(New, Old); | ||||||
3331 | |||||||
3332 | // If the old declaration is invalid, just give up here. | ||||||
3333 | if (Old->isInvalidDecl()) | ||||||
3334 | return true; | ||||||
3335 | |||||||
3336 | // Disallow redeclaration of some builtins. | ||||||
3337 | if (!getASTContext().canBuiltinBeRedeclared(Old)) { | ||||||
3338 | Diag(New->getLocation(), diag::err_builtin_redeclare) << Old->getDeclName(); | ||||||
3339 | Diag(Old->getLocation(), diag::note_previous_builtin_declaration) | ||||||
3340 | << Old << Old->getType(); | ||||||
3341 | return true; | ||||||
3342 | } | ||||||
3343 | |||||||
3344 | diag::kind PrevDiag; | ||||||
3345 | SourceLocation OldLocation; | ||||||
3346 | std::tie(PrevDiag, OldLocation) = | ||||||
3347 | getNoteDiagForInvalidRedeclaration(Old, New); | ||||||
3348 | |||||||
3349 | // Don't complain about this if we're in GNU89 mode and the old function | ||||||
3350 | // is an extern inline function. | ||||||
3351 | // Don't complain about specializations. They are not supposed to have | ||||||
3352 | // storage classes. | ||||||
3353 | if (!isa<CXXMethodDecl>(New) && !isa<CXXMethodDecl>(Old) && | ||||||
3354 | New->getStorageClass() == SC_Static && | ||||||
3355 | Old->hasExternalFormalLinkage() && | ||||||
3356 | !New->getTemplateSpecializationInfo() && | ||||||
3357 | !canRedefineFunction(Old, getLangOpts())) { | ||||||
3358 | if (getLangOpts().MicrosoftExt) { | ||||||
3359 | Diag(New->getLocation(), diag::ext_static_non_static) << New; | ||||||
3360 | Diag(OldLocation, PrevDiag); | ||||||
3361 | } else { | ||||||
3362 | Diag(New->getLocation(), diag::err_static_non_static) << New; | ||||||
3363 | Diag(OldLocation, PrevDiag); | ||||||
3364 | return true; | ||||||
3365 | } | ||||||
3366 | } | ||||||
3367 | |||||||
3368 | if (const auto *ILA = New->getAttr<InternalLinkageAttr>()) | ||||||
3369 | if (!Old->hasAttr<InternalLinkageAttr>()) { | ||||||
3370 | Diag(New->getLocation(), diag::err_attribute_missing_on_first_decl) | ||||||
3371 | << ILA; | ||||||
3372 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
3373 | New->dropAttr<InternalLinkageAttr>(); | ||||||
3374 | } | ||||||
3375 | |||||||
3376 | if (auto *EA = New->getAttr<ErrorAttr>()) { | ||||||
3377 | if (!Old->hasAttr<ErrorAttr>()) { | ||||||
3378 | Diag(EA->getLocation(), diag::err_attribute_missing_on_first_decl) << EA; | ||||||
3379 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
3380 | New->dropAttr<ErrorAttr>(); | ||||||
3381 | } | ||||||
3382 | } | ||||||
3383 | |||||||
3384 | if (CheckRedeclarationModuleOwnership(New, Old)) | ||||||
3385 | return true; | ||||||
3386 | |||||||
3387 | if (!getLangOpts().CPlusPlus) { | ||||||
3388 | bool OldOvl = Old->hasAttr<OverloadableAttr>(); | ||||||
3389 | if (OldOvl != New->hasAttr<OverloadableAttr>() && !Old->isImplicit()) { | ||||||
3390 | Diag(New->getLocation(), diag::err_attribute_overloadable_mismatch) | ||||||
3391 | << New << OldOvl; | ||||||
3392 | |||||||
3393 | // Try our best to find a decl that actually has the overloadable | ||||||
3394 | // attribute for the note. In most cases (e.g. programs with only one | ||||||
3395 | // broken declaration/definition), this won't matter. | ||||||
3396 | // | ||||||
3397 | // FIXME: We could do this if we juggled some extra state in | ||||||
3398 | // OverloadableAttr, rather than just removing it. | ||||||
3399 | const Decl *DiagOld = Old; | ||||||
3400 | if (OldOvl) { | ||||||
3401 | auto OldIter = llvm::find_if(Old->redecls(), [](const Decl *D) { | ||||||
3402 | const auto *A = D->getAttr<OverloadableAttr>(); | ||||||
3403 | return A && !A->isImplicit(); | ||||||
3404 | }); | ||||||
3405 | // If we've implicitly added *all* of the overloadable attrs to this | ||||||
3406 | // chain, emitting a "previous redecl" note is pointless. | ||||||
3407 | DiagOld = OldIter == Old->redecls_end() ? nullptr : *OldIter; | ||||||
3408 | } | ||||||
3409 | |||||||
3410 | if (DiagOld) | ||||||
3411 | Diag(DiagOld->getLocation(), | ||||||
3412 | diag::note_attribute_overloadable_prev_overload) | ||||||
3413 | << OldOvl; | ||||||
3414 | |||||||
3415 | if (OldOvl) | ||||||
3416 | New->addAttr(OverloadableAttr::CreateImplicit(Context)); | ||||||
3417 | else | ||||||
3418 | New->dropAttr<OverloadableAttr>(); | ||||||
3419 | } | ||||||
3420 | } | ||||||
3421 | |||||||
3422 | // If a function is first declared with a calling convention, but is later | ||||||
3423 | // declared or defined without one, all following decls assume the calling | ||||||
3424 | // convention of the first. | ||||||
3425 | // | ||||||
3426 | // It's OK if a function is first declared without a calling convention, | ||||||
3427 | // but is later declared or defined with the default calling convention. | ||||||
3428 | // | ||||||
3429 | // To test if either decl has an explicit calling convention, we look for | ||||||
3430 | // AttributedType sugar nodes on the type as written. If they are missing or | ||||||
3431 | // were canonicalized away, we assume the calling convention was implicit. | ||||||
3432 | // | ||||||
3433 | // Note also that we DO NOT return at this point, because we still have | ||||||
3434 | // other tests to run. | ||||||
3435 | QualType OldQType = Context.getCanonicalType(Old->getType()); | ||||||
3436 | QualType NewQType = Context.getCanonicalType(New->getType()); | ||||||
3437 | const FunctionType *OldType = cast<FunctionType>(OldQType); | ||||||
3438 | const FunctionType *NewType = cast<FunctionType>(NewQType); | ||||||
3439 | FunctionType::ExtInfo OldTypeInfo = OldType->getExtInfo(); | ||||||
3440 | FunctionType::ExtInfo NewTypeInfo = NewType->getExtInfo(); | ||||||
3441 | bool RequiresAdjustment = false; | ||||||
3442 | |||||||
3443 | if (OldTypeInfo.getCC() != NewTypeInfo.getCC()) { | ||||||
3444 | FunctionDecl *First = Old->getFirstDecl(); | ||||||
3445 | const FunctionType *FT = | ||||||
3446 | First->getType().getCanonicalType()->castAs<FunctionType>(); | ||||||
3447 | FunctionType::ExtInfo FI = FT->getExtInfo(); | ||||||
3448 | bool NewCCExplicit = getCallingConvAttributedType(New->getType()); | ||||||
3449 | if (!NewCCExplicit) { | ||||||
3450 | // Inherit the CC from the previous declaration if it was specified | ||||||
3451 | // there but not here. | ||||||
3452 | NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC()); | ||||||
3453 | RequiresAdjustment = true; | ||||||
3454 | } else if (Old->getBuiltinID()) { | ||||||
3455 | // Builtin attribute isn't propagated to the new one yet at this point, | ||||||
3456 | // so we check if the old one is a builtin. | ||||||
3457 | |||||||
3458 | // Calling Conventions on a Builtin aren't really useful and setting a | ||||||
3459 | // default calling convention and cdecl'ing some builtin redeclarations is | ||||||
3460 | // common, so warn and ignore the calling convention on the redeclaration. | ||||||
3461 | Diag(New->getLocation(), diag::warn_cconv_unsupported) | ||||||
3462 | << FunctionType::getNameForCallConv(NewTypeInfo.getCC()) | ||||||
3463 | << (int)CallingConventionIgnoredReason::BuiltinFunction; | ||||||
3464 | NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC()); | ||||||
3465 | RequiresAdjustment = true; | ||||||
3466 | } else { | ||||||
3467 | // Calling conventions aren't compatible, so complain. | ||||||
3468 | bool FirstCCExplicit = getCallingConvAttributedType(First->getType()); | ||||||
3469 | Diag(New->getLocation(), diag::err_cconv_change) | ||||||
3470 | << FunctionType::getNameForCallConv(NewTypeInfo.getCC()) | ||||||
3471 | << !FirstCCExplicit | ||||||
3472 | << (!FirstCCExplicit ? "" : | ||||||
3473 | FunctionType::getNameForCallConv(FI.getCC())); | ||||||
3474 | |||||||
3475 | // Put the note on the first decl, since it is the one that matters. | ||||||
3476 | Diag(First->getLocation(), diag::note_previous_declaration); | ||||||
3477 | return true; | ||||||
3478 | } | ||||||
3479 | } | ||||||
3480 | |||||||
3481 | // FIXME: diagnose the other way around? | ||||||
3482 | if (OldTypeInfo.getNoReturn() && !NewTypeInfo.getNoReturn()) { | ||||||
3483 | NewTypeInfo = NewTypeInfo.withNoReturn(true); | ||||||
3484 | RequiresAdjustment = true; | ||||||
3485 | } | ||||||
3486 | |||||||
3487 | // Merge regparm attribute. | ||||||
3488 | if (OldTypeInfo.getHasRegParm() != NewTypeInfo.getHasRegParm() || | ||||||
3489 | OldTypeInfo.getRegParm() != NewTypeInfo.getRegParm()) { | ||||||
3490 | if (NewTypeInfo.getHasRegParm()) { | ||||||
3491 | Diag(New->getLocation(), diag::err_regparm_mismatch) | ||||||
3492 | << NewType->getRegParmType() | ||||||
3493 | << OldType->getRegParmType(); | ||||||
3494 | Diag(OldLocation, diag::note_previous_declaration); | ||||||
3495 | return true; | ||||||
3496 | } | ||||||
3497 | |||||||
3498 | NewTypeInfo = NewTypeInfo.withRegParm(OldTypeInfo.getRegParm()); | ||||||
3499 | RequiresAdjustment = true; | ||||||
3500 | } | ||||||
3501 | |||||||
3502 | // Merge ns_returns_retained attribute. | ||||||
3503 | if (OldTypeInfo.getProducesResult() != NewTypeInfo.getProducesResult()) { | ||||||
3504 | if (NewTypeInfo.getProducesResult()) { | ||||||
3505 | Diag(New->getLocation(), diag::err_function_attribute_mismatch) | ||||||
3506 | << "'ns_returns_retained'"; | ||||||
3507 | Diag(OldLocation, diag::note_previous_declaration); | ||||||
3508 | return true; | ||||||
3509 | } | ||||||
3510 | |||||||
3511 | NewTypeInfo = NewTypeInfo.withProducesResult(true); | ||||||
3512 | RequiresAdjustment = true; | ||||||
3513 | } | ||||||
3514 | |||||||
3515 | if (OldTypeInfo.getNoCallerSavedRegs() != | ||||||
3516 | NewTypeInfo.getNoCallerSavedRegs()) { | ||||||
3517 | if (NewTypeInfo.getNoCallerSavedRegs()) { | ||||||
3518 | AnyX86NoCallerSavedRegistersAttr *Attr = | ||||||
3519 | New->getAttr<AnyX86NoCallerSavedRegistersAttr>(); | ||||||
3520 | Diag(New->getLocation(), diag::err_function_attribute_mismatch) << Attr; | ||||||
3521 | Diag(OldLocation, diag::note_previous_declaration); | ||||||
3522 | return true; | ||||||
3523 | } | ||||||
3524 | |||||||
3525 | NewTypeInfo = NewTypeInfo.withNoCallerSavedRegs(true); | ||||||
3526 | RequiresAdjustment = true; | ||||||
3527 | } | ||||||
3528 | |||||||
3529 | if (RequiresAdjustment) { | ||||||
3530 | const FunctionType *AdjustedType = New->getType()->getAs<FunctionType>(); | ||||||
3531 | AdjustedType = Context.adjustFunctionType(AdjustedType, NewTypeInfo); | ||||||
3532 | New->setType(QualType(AdjustedType, 0)); | ||||||
3533 | NewQType = Context.getCanonicalType(New->getType()); | ||||||
3534 | } | ||||||
3535 | |||||||
3536 | // If this redeclaration makes the function inline, we may need to add it to | ||||||
3537 | // UndefinedButUsed. | ||||||
3538 | if (!Old->isInlined() && New->isInlined() && | ||||||
3539 | !New->hasAttr<GNUInlineAttr>() && | ||||||
3540 | !getLangOpts().GNUInline && | ||||||
3541 | Old->isUsed(false) && | ||||||
3542 | !Old->isDefined() && !New->isThisDeclarationADefinition()) | ||||||
3543 | UndefinedButUsed.insert(std::make_pair(Old->getCanonicalDecl(), | ||||||
3544 | SourceLocation())); | ||||||
3545 | |||||||
3546 | // If this redeclaration makes it newly gnu_inline, we don't want to warn | ||||||
3547 | // about it. | ||||||
3548 | if (New->hasAttr<GNUInlineAttr>() && | ||||||
3549 | Old->isInlined() && !Old->hasAttr<GNUInlineAttr>()) { | ||||||
3550 | UndefinedButUsed.erase(Old->getCanonicalDecl()); | ||||||
3551 | } | ||||||
3552 | |||||||
3553 | // If pass_object_size params don't match up perfectly, this isn't a valid | ||||||
3554 | // redeclaration. | ||||||
3555 | if (Old->getNumParams() > 0 && Old->getNumParams() == New->getNumParams() && | ||||||
3556 | !hasIdenticalPassObjectSizeAttrs(Old, New)) { | ||||||
3557 | Diag(New->getLocation(), diag::err_different_pass_object_size_params) | ||||||
3558 | << New->getDeclName(); | ||||||
3559 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3560 | return true; | ||||||
3561 | } | ||||||
3562 | |||||||
3563 | if (getLangOpts().CPlusPlus) { | ||||||
3564 | // C++1z [over.load]p2 | ||||||
3565 | // Certain function declarations cannot be overloaded: | ||||||
3566 | // -- Function declarations that differ only in the return type, | ||||||
3567 | // the exception specification, or both cannot be overloaded. | ||||||
3568 | |||||||
3569 | // Check the exception specifications match. This may recompute the type of | ||||||
3570 | // both Old and New if it resolved exception specifications, so grab the | ||||||
3571 | // types again after this. Because this updates the type, we do this before | ||||||
3572 | // any of the other checks below, which may update the "de facto" NewQType | ||||||
3573 | // but do not necessarily update the type of New. | ||||||
3574 | if (CheckEquivalentExceptionSpec(Old, New)) | ||||||
3575 | return true; | ||||||
3576 | OldQType = Context.getCanonicalType(Old->getType()); | ||||||
3577 | NewQType = Context.getCanonicalType(New->getType()); | ||||||
3578 | |||||||
3579 | // Go back to the type source info to compare the declared return types, | ||||||
3580 | // per C++1y [dcl.type.auto]p13: | ||||||
3581 | // Redeclarations or specializations of a function or function template | ||||||
3582 | // with a declared return type that uses a placeholder type shall also | ||||||
3583 | // use that placeholder, not a deduced type. | ||||||
3584 | QualType OldDeclaredReturnType = Old->getDeclaredReturnType(); | ||||||
3585 | QualType NewDeclaredReturnType = New->getDeclaredReturnType(); | ||||||
3586 | if (!Context.hasSameType(OldDeclaredReturnType, NewDeclaredReturnType) && | ||||||
3587 | canFullyTypeCheckRedeclaration(New, Old, NewDeclaredReturnType, | ||||||
3588 | OldDeclaredReturnType)) { | ||||||
3589 | QualType ResQT; | ||||||
3590 | if (NewDeclaredReturnType->isObjCObjectPointerType() && | ||||||
3591 | OldDeclaredReturnType->isObjCObjectPointerType()) | ||||||
3592 | // FIXME: This does the wrong thing for a deduced return type. | ||||||
3593 | ResQT = Context.mergeObjCGCQualifiers(NewQType, OldQType); | ||||||
3594 | if (ResQT.isNull()) { | ||||||
3595 | if (New->isCXXClassMember() && New->isOutOfLine()) | ||||||
3596 | Diag(New->getLocation(), diag::err_member_def_does_not_match_ret_type) | ||||||
3597 | << New << New->getReturnTypeSourceRange(); | ||||||
3598 | else | ||||||
3599 | Diag(New->getLocation(), diag::err_ovl_diff_return_type) | ||||||
3600 | << New->getReturnTypeSourceRange(); | ||||||
3601 | Diag(OldLocation, PrevDiag) << Old << Old->getType() | ||||||
3602 | << Old->getReturnTypeSourceRange(); | ||||||
3603 | return true; | ||||||
3604 | } | ||||||
3605 | else | ||||||
3606 | NewQType = ResQT; | ||||||
3607 | } | ||||||
3608 | |||||||
3609 | QualType OldReturnType = OldType->getReturnType(); | ||||||
3610 | QualType NewReturnType = cast<FunctionType>(NewQType)->getReturnType(); | ||||||
3611 | if (OldReturnType != NewReturnType) { | ||||||
3612 | // If this function has a deduced return type and has already been | ||||||
3613 | // defined, copy the deduced value from the old declaration. | ||||||
3614 | AutoType *OldAT = Old->getReturnType()->getContainedAutoType(); | ||||||
3615 | if (OldAT && OldAT->isDeduced()) { | ||||||
3616 | New->setType( | ||||||
3617 | SubstAutoType(New->getType(), | ||||||
3618 | OldAT->isDependentType() ? Context.DependentTy | ||||||
3619 | : OldAT->getDeducedType())); | ||||||
3620 | NewQType = Context.getCanonicalType( | ||||||
3621 | SubstAutoType(NewQType, | ||||||
3622 | OldAT->isDependentType() ? Context.DependentTy | ||||||
3623 | : OldAT->getDeducedType())); | ||||||
3624 | } | ||||||
3625 | } | ||||||
3626 | |||||||
3627 | const CXXMethodDecl *OldMethod = dyn_cast<CXXMethodDecl>(Old); | ||||||
3628 | CXXMethodDecl *NewMethod = dyn_cast<CXXMethodDecl>(New); | ||||||
3629 | if (OldMethod && NewMethod) { | ||||||
3630 | // Preserve triviality. | ||||||
3631 | NewMethod->setTrivial(OldMethod->isTrivial()); | ||||||
3632 | |||||||
3633 | // MSVC allows explicit template specialization at class scope: | ||||||
3634 | // 2 CXXMethodDecls referring to the same function will be injected. | ||||||
3635 | // We don't want a redeclaration error. | ||||||
3636 | bool IsClassScopeExplicitSpecialization = | ||||||
3637 | OldMethod->isFunctionTemplateSpecialization() && | ||||||
3638 | NewMethod->isFunctionTemplateSpecialization(); | ||||||
3639 | bool isFriend = NewMethod->getFriendObjectKind(); | ||||||
3640 | |||||||
3641 | if (!isFriend && NewMethod->getLexicalDeclContext()->isRecord() && | ||||||
3642 | !IsClassScopeExplicitSpecialization) { | ||||||
3643 | // -- Member function declarations with the same name and the | ||||||
3644 | // same parameter types cannot be overloaded if any of them | ||||||
3645 | // is a static member function declaration. | ||||||
3646 | if (OldMethod->isStatic() != NewMethod->isStatic()) { | ||||||
3647 | Diag(New->getLocation(), diag::err_ovl_static_nonstatic_member); | ||||||
3648 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3649 | return true; | ||||||
3650 | } | ||||||
3651 | |||||||
3652 | // C++ [class.mem]p1: | ||||||
3653 | // [...] A member shall not be declared twice in the | ||||||
3654 | // member-specification, except that a nested class or member | ||||||
3655 | // class template can be declared and then later defined. | ||||||
3656 | if (!inTemplateInstantiation()) { | ||||||
3657 | unsigned NewDiag; | ||||||
3658 | if (isa<CXXConstructorDecl>(OldMethod)) | ||||||
3659 | NewDiag = diag::err_constructor_redeclared; | ||||||
3660 | else if (isa<CXXDestructorDecl>(NewMethod)) | ||||||
3661 | NewDiag = diag::err_destructor_redeclared; | ||||||
3662 | else if (isa<CXXConversionDecl>(NewMethod)) | ||||||
3663 | NewDiag = diag::err_conv_function_redeclared; | ||||||
3664 | else | ||||||
3665 | NewDiag = diag::err_member_redeclared; | ||||||
3666 | |||||||
3667 | Diag(New->getLocation(), NewDiag); | ||||||
3668 | } else { | ||||||
3669 | Diag(New->getLocation(), diag::err_member_redeclared_in_instantiation) | ||||||
3670 | << New << New->getType(); | ||||||
3671 | } | ||||||
3672 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3673 | return true; | ||||||
3674 | |||||||
3675 | // Complain if this is an explicit declaration of a special | ||||||
3676 | // member that was initially declared implicitly. | ||||||
3677 | // | ||||||
3678 | // As an exception, it's okay to befriend such methods in order | ||||||
3679 | // to permit the implicit constructor/destructor/operator calls. | ||||||
3680 | } else if (OldMethod->isImplicit()) { | ||||||
3681 | if (isFriend) { | ||||||
3682 | NewMethod->setImplicit(); | ||||||
3683 | } else { | ||||||
3684 | Diag(NewMethod->getLocation(), | ||||||
3685 | diag::err_definition_of_implicitly_declared_member) | ||||||
3686 | << New << getSpecialMember(OldMethod); | ||||||
3687 | return true; | ||||||
3688 | } | ||||||
3689 | } else if (OldMethod->getFirstDecl()->isExplicitlyDefaulted() && !isFriend) { | ||||||
3690 | Diag(NewMethod->getLocation(), | ||||||
3691 | diag::err_definition_of_explicitly_defaulted_member) | ||||||
3692 | << getSpecialMember(OldMethod); | ||||||
3693 | return true; | ||||||
3694 | } | ||||||
3695 | } | ||||||
3696 | |||||||
3697 | // C++11 [dcl.attr.noreturn]p1: | ||||||
3698 | // The first declaration of a function shall specify the noreturn | ||||||
3699 | // attribute if any declaration of that function specifies the noreturn | ||||||
3700 | // attribute. | ||||||
3701 | if (const auto *NRA = New->getAttr<CXX11NoReturnAttr>()) | ||||||
3702 | if (!Old->hasAttr<CXX11NoReturnAttr>()) { | ||||||
3703 | Diag(NRA->getLocation(), diag::err_attribute_missing_on_first_decl) | ||||||
3704 | << NRA; | ||||||
3705 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
3706 | } | ||||||
3707 | |||||||
3708 | // C++11 [dcl.attr.depend]p2: | ||||||
3709 | // The first declaration of a function shall specify the | ||||||
3710 | // carries_dependency attribute for its declarator-id if any declaration | ||||||
3711 | // of the function specifies the carries_dependency attribute. | ||||||
3712 | const CarriesDependencyAttr *CDA = New->getAttr<CarriesDependencyAttr>(); | ||||||
3713 | if (CDA && !Old->hasAttr<CarriesDependencyAttr>()) { | ||||||
3714 | Diag(CDA->getLocation(), | ||||||
3715 | diag::err_carries_dependency_missing_on_first_decl) << 0/*Function*/; | ||||||
3716 | Diag(Old->getFirstDecl()->getLocation(), | ||||||
3717 | diag::note_carries_dependency_missing_first_decl) << 0/*Function*/; | ||||||
3718 | } | ||||||
3719 | |||||||
3720 | // (C++98 8.3.5p3): | ||||||
3721 | // All declarations for a function shall agree exactly in both the | ||||||
3722 | // return type and the parameter-type-list. | ||||||
3723 | // We also want to respect all the extended bits except noreturn. | ||||||
3724 | |||||||
3725 | // noreturn should now match unless the old type info didn't have it. | ||||||
3726 | QualType OldQTypeForComparison = OldQType; | ||||||
3727 | if (!OldTypeInfo.getNoReturn() && NewTypeInfo.getNoReturn()) { | ||||||
3728 | auto *OldType = OldQType->castAs<FunctionProtoType>(); | ||||||
3729 | const FunctionType *OldTypeForComparison | ||||||
3730 | = Context.adjustFunctionType(OldType, OldTypeInfo.withNoReturn(true)); | ||||||
3731 | OldQTypeForComparison = QualType(OldTypeForComparison, 0); | ||||||
3732 | assert(OldQTypeForComparison.isCanonical())(static_cast <bool> (OldQTypeForComparison.isCanonical( )) ? void (0) : __assert_fail ("OldQTypeForComparison.isCanonical()" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 3732, __extension__ __PRETTY_FUNCTION__)); | ||||||
3733 | } | ||||||
3734 | |||||||
3735 | if (haveIncompatibleLanguageLinkages(Old, New)) { | ||||||
3736 | // As a special case, retain the language linkage from previous | ||||||
3737 | // declarations of a friend function as an extension. | ||||||
3738 | // | ||||||
3739 | // This liberal interpretation of C++ [class.friend]p3 matches GCC/MSVC | ||||||
3740 | // and is useful because there's otherwise no way to specify language | ||||||
3741 | // linkage within class scope. | ||||||
3742 | // | ||||||
3743 | // Check cautiously as the friend object kind isn't yet complete. | ||||||
3744 | if (New->getFriendObjectKind() != Decl::FOK_None) { | ||||||
3745 | Diag(New->getLocation(), diag::ext_retained_language_linkage) << New; | ||||||
3746 | Diag(OldLocation, PrevDiag); | ||||||
3747 | } else { | ||||||
3748 | Diag(New->getLocation(), diag::err_different_language_linkage) << New; | ||||||
3749 | Diag(OldLocation, PrevDiag); | ||||||
3750 | return true; | ||||||
3751 | } | ||||||
3752 | } | ||||||
3753 | |||||||
3754 | // If the function types are compatible, merge the declarations. Ignore the | ||||||
3755 | // exception specifier because it was already checked above in | ||||||
3756 | // CheckEquivalentExceptionSpec, and we don't want follow-on diagnostics | ||||||
3757 | // about incompatible types under -fms-compatibility. | ||||||
3758 | if (Context.hasSameFunctionTypeIgnoringExceptionSpec(OldQTypeForComparison, | ||||||
3759 | NewQType)) | ||||||
3760 | return MergeCompatibleFunctionDecls(New, Old, S, MergeTypeWithOld); | ||||||
3761 | |||||||
3762 | // If the types are imprecise (due to dependent constructs in friends or | ||||||
3763 | // local extern declarations), it's OK if they differ. We'll check again | ||||||
3764 | // during instantiation. | ||||||
3765 | if (!canFullyTypeCheckRedeclaration(New, Old, NewQType, OldQType)) | ||||||
3766 | return false; | ||||||
3767 | |||||||
3768 | // Fall through for conflicting redeclarations and redefinitions. | ||||||
3769 | } | ||||||
3770 | |||||||
3771 | // C: Function types need to be compatible, not identical. This handles | ||||||
3772 | // duplicate function decls like "void f(int); void f(enum X);" properly. | ||||||
3773 | if (!getLangOpts().CPlusPlus && | ||||||
3774 | Context.typesAreCompatible(OldQType, NewQType)) { | ||||||
3775 | const FunctionType *OldFuncType = OldQType->getAs<FunctionType>(); | ||||||
3776 | const FunctionType *NewFuncType = NewQType->getAs<FunctionType>(); | ||||||
3777 | const FunctionProtoType *OldProto = nullptr; | ||||||
3778 | if (MergeTypeWithOld && isa<FunctionNoProtoType>(NewFuncType) && | ||||||
3779 | (OldProto = dyn_cast<FunctionProtoType>(OldFuncType))) { | ||||||
3780 | // The old declaration provided a function prototype, but the | ||||||
3781 | // new declaration does not. Merge in the prototype. | ||||||
3782 | assert(!OldProto->hasExceptionSpec() && "Exception spec in C")(static_cast <bool> (!OldProto->hasExceptionSpec() && "Exception spec in C") ? void (0) : __assert_fail ("!OldProto->hasExceptionSpec() && \"Exception spec in C\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 3782, __extension__ __PRETTY_FUNCTION__)); | ||||||
3783 | SmallVector<QualType, 16> ParamTypes(OldProto->param_types()); | ||||||
3784 | NewQType = | ||||||
3785 | Context.getFunctionType(NewFuncType->getReturnType(), ParamTypes, | ||||||
3786 | OldProto->getExtProtoInfo()); | ||||||
3787 | New->setType(NewQType); | ||||||
3788 | New->setHasInheritedPrototype(); | ||||||
3789 | |||||||
3790 | // Synthesize parameters with the same types. | ||||||
3791 | SmallVector<ParmVarDecl*, 16> Params; | ||||||
3792 | for (const auto &ParamType : OldProto->param_types()) { | ||||||
3793 | ParmVarDecl *Param = ParmVarDecl::Create(Context, New, SourceLocation(), | ||||||
3794 | SourceLocation(), nullptr, | ||||||
3795 | ParamType, /*TInfo=*/nullptr, | ||||||
3796 | SC_None, nullptr); | ||||||
3797 | Param->setScopeInfo(0, Params.size()); | ||||||
3798 | Param->setImplicit(); | ||||||
3799 | Params.push_back(Param); | ||||||
3800 | } | ||||||
3801 | |||||||
3802 | New->setParams(Params); | ||||||
3803 | } | ||||||
3804 | |||||||
3805 | return MergeCompatibleFunctionDecls(New, Old, S, MergeTypeWithOld); | ||||||
3806 | } | ||||||
3807 | |||||||
3808 | // Check if the function types are compatible when pointer size address | ||||||
3809 | // spaces are ignored. | ||||||
3810 | if (Context.hasSameFunctionTypeIgnoringPtrSizes(OldQType, NewQType)) | ||||||
3811 | return false; | ||||||
3812 | |||||||
3813 | // GNU C permits a K&R definition to follow a prototype declaration | ||||||
3814 | // if the declared types of the parameters in the K&R definition | ||||||
3815 | // match the types in the prototype declaration, even when the | ||||||
3816 | // promoted types of the parameters from the K&R definition differ | ||||||
3817 | // from the types in the prototype. GCC then keeps the types from | ||||||
3818 | // the prototype. | ||||||
3819 | // | ||||||
3820 | // If a variadic prototype is followed by a non-variadic K&R definition, | ||||||
3821 | // the K&R definition becomes variadic. This is sort of an edge case, but | ||||||
3822 | // it's legal per the standard depending on how you read C99 6.7.5.3p15 and | ||||||
3823 | // C99 6.9.1p8. | ||||||
3824 | if (!getLangOpts().CPlusPlus && | ||||||
3825 | Old->hasPrototype() && !New->hasPrototype() && | ||||||
3826 | New->getType()->getAs<FunctionProtoType>() && | ||||||
3827 | Old->getNumParams() == New->getNumParams()) { | ||||||
3828 | SmallVector<QualType, 16> ArgTypes; | ||||||
3829 | SmallVector<GNUCompatibleParamWarning, 16> Warnings; | ||||||
3830 | const FunctionProtoType *OldProto | ||||||
3831 | = Old->getType()->getAs<FunctionProtoType>(); | ||||||
3832 | const FunctionProtoType *NewProto | ||||||
3833 | = New->getType()->getAs<FunctionProtoType>(); | ||||||
3834 | |||||||
3835 | // Determine whether this is the GNU C extension. | ||||||
3836 | QualType MergedReturn = Context.mergeTypes(OldProto->getReturnType(), | ||||||
3837 | NewProto->getReturnType()); | ||||||
3838 | bool LooseCompatible = !MergedReturn.isNull(); | ||||||
3839 | for (unsigned Idx = 0, End = Old->getNumParams(); | ||||||
3840 | LooseCompatible && Idx != End; ++Idx) { | ||||||
3841 | ParmVarDecl *OldParm = Old->getParamDecl(Idx); | ||||||
3842 | ParmVarDecl *NewParm = New->getParamDecl(Idx); | ||||||
3843 | if (Context.typesAreCompatible(OldParm->getType(), | ||||||
3844 | NewProto->getParamType(Idx))) { | ||||||
3845 | ArgTypes.push_back(NewParm->getType()); | ||||||
3846 | } else if (Context.typesAreCompatible(OldParm->getType(), | ||||||
3847 | NewParm->getType(), | ||||||
3848 | /*CompareUnqualified=*/true)) { | ||||||
3849 | GNUCompatibleParamWarning Warn = { OldParm, NewParm, | ||||||
3850 | NewProto->getParamType(Idx) }; | ||||||
3851 | Warnings.push_back(Warn); | ||||||
3852 | ArgTypes.push_back(NewParm->getType()); | ||||||
3853 | } else | ||||||
3854 | LooseCompatible = false; | ||||||
3855 | } | ||||||
3856 | |||||||
3857 | if (LooseCompatible) { | ||||||
3858 | for (unsigned Warn = 0; Warn < Warnings.size(); ++Warn) { | ||||||
3859 | Diag(Warnings[Warn].NewParm->getLocation(), | ||||||
3860 | diag::ext_param_promoted_not_compatible_with_prototype) | ||||||
3861 | << Warnings[Warn].PromotedType | ||||||
3862 | << Warnings[Warn].OldParm->getType(); | ||||||
3863 | if (Warnings[Warn].OldParm->getLocation().isValid()) | ||||||
3864 | Diag(Warnings[Warn].OldParm->getLocation(), | ||||||
3865 | diag::note_previous_declaration); | ||||||
3866 | } | ||||||
3867 | |||||||
3868 | if (MergeTypeWithOld) | ||||||
3869 | New->setType(Context.getFunctionType(MergedReturn, ArgTypes, | ||||||
3870 | OldProto->getExtProtoInfo())); | ||||||
3871 | return MergeCompatibleFunctionDecls(New, Old, S, MergeTypeWithOld); | ||||||
3872 | } | ||||||
3873 | |||||||
3874 | // Fall through to diagnose conflicting types. | ||||||
3875 | } | ||||||
3876 | |||||||
3877 | // A function that has already been declared has been redeclared or | ||||||
3878 | // defined with a different type; show an appropriate diagnostic. | ||||||
3879 | |||||||
3880 | // If the previous declaration was an implicitly-generated builtin | ||||||
3881 | // declaration, then at the very least we should use a specialized note. | ||||||
3882 | unsigned BuiltinID; | ||||||
3883 | if (Old->isImplicit() && (BuiltinID = Old->getBuiltinID())) { | ||||||
3884 | // If it's actually a library-defined builtin function like 'malloc' | ||||||
3885 | // or 'printf', just warn about the incompatible redeclaration. | ||||||
3886 | if (Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { | ||||||
3887 | Diag(New->getLocation(), diag::warn_redecl_library_builtin) << New; | ||||||
3888 | Diag(OldLocation, diag::note_previous_builtin_declaration) | ||||||
3889 | << Old << Old->getType(); | ||||||
3890 | return false; | ||||||
3891 | } | ||||||
3892 | |||||||
3893 | PrevDiag = diag::note_previous_builtin_declaration; | ||||||
3894 | } | ||||||
3895 | |||||||
3896 | Diag(New->getLocation(), diag::err_conflicting_types) << New->getDeclName(); | ||||||
3897 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3898 | return true; | ||||||
3899 | } | ||||||
3900 | |||||||
3901 | /// Completes the merge of two function declarations that are | ||||||
3902 | /// known to be compatible. | ||||||
3903 | /// | ||||||
3904 | /// This routine handles the merging of attributes and other | ||||||
3905 | /// properties of function declarations from the old declaration to | ||||||
3906 | /// the new declaration, once we know that New is in fact a | ||||||
3907 | /// redeclaration of Old. | ||||||
3908 | /// | ||||||
3909 | /// \returns false | ||||||
3910 | bool Sema::MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old, | ||||||
3911 | Scope *S, bool MergeTypeWithOld) { | ||||||
3912 | // Merge the attributes | ||||||
3913 | mergeDeclAttributes(New, Old); | ||||||
3914 | |||||||
3915 | // Merge "pure" flag. | ||||||
3916 | if (Old->isPure()) | ||||||
3917 | New->setPure(); | ||||||
3918 | |||||||
3919 | // Merge "used" flag. | ||||||
3920 | if (Old->getMostRecentDecl()->isUsed(false)) | ||||||
3921 | New->setIsUsed(); | ||||||
3922 | |||||||
3923 | // Merge attributes from the parameters. These can mismatch with K&R | ||||||
3924 | // declarations. | ||||||
3925 | if (New->getNumParams() == Old->getNumParams()) | ||||||
3926 | for (unsigned i = 0, e = New->getNumParams(); i != e; ++i) { | ||||||
3927 | ParmVarDecl *NewParam = New->getParamDecl(i); | ||||||
3928 | ParmVarDecl *OldParam = Old->getParamDecl(i); | ||||||
3929 | mergeParamDeclAttributes(NewParam, OldParam, *this); | ||||||
3930 | mergeParamDeclTypes(NewParam, OldParam, *this); | ||||||
3931 | } | ||||||
3932 | |||||||
3933 | if (getLangOpts().CPlusPlus) | ||||||
3934 | return MergeCXXFunctionDecl(New, Old, S); | ||||||
3935 | |||||||
3936 | // Merge the function types so the we get the composite types for the return | ||||||
3937 | // and argument types. Per C11 6.2.7/4, only update the type if the old decl | ||||||
3938 | // was visible. | ||||||
3939 | QualType Merged = Context.mergeTypes(Old->getType(), New->getType()); | ||||||
3940 | if (!Merged.isNull() && MergeTypeWithOld) | ||||||
3941 | New->setType(Merged); | ||||||
3942 | |||||||
3943 | return false; | ||||||
3944 | } | ||||||
3945 | |||||||
3946 | void Sema::mergeObjCMethodDecls(ObjCMethodDecl *newMethod, | ||||||
3947 | ObjCMethodDecl *oldMethod) { | ||||||
3948 | // Merge the attributes, including deprecated/unavailable | ||||||
3949 | AvailabilityMergeKind MergeKind = | ||||||
3950 | isa<ObjCProtocolDecl>(oldMethod->getDeclContext()) | ||||||
3951 | ? (oldMethod->isOptional() ? AMK_OptionalProtocolImplementation | ||||||
3952 | : AMK_ProtocolImplementation) | ||||||
3953 | : isa<ObjCImplDecl>(newMethod->getDeclContext()) ? AMK_Redeclaration | ||||||
3954 | : AMK_Override; | ||||||
3955 | |||||||
3956 | mergeDeclAttributes(newMethod, oldMethod, MergeKind); | ||||||
3957 | |||||||
3958 | // Merge attributes from the parameters. | ||||||
3959 | ObjCMethodDecl::param_const_iterator oi = oldMethod->param_begin(), | ||||||
3960 | oe = oldMethod->param_end(); | ||||||
3961 | for (ObjCMethodDecl::param_iterator | ||||||
3962 | ni = newMethod->param_begin(), ne = newMethod->param_end(); | ||||||
3963 | ni != ne && oi != oe; ++ni, ++oi) | ||||||
3964 | mergeParamDeclAttributes(*ni, *oi, *this); | ||||||
3965 | |||||||
3966 | CheckObjCMethodOverride(newMethod, oldMethod); | ||||||
3967 | } | ||||||
3968 | |||||||
3969 | static void diagnoseVarDeclTypeMismatch(Sema &S, VarDecl *New, VarDecl* Old) { | ||||||
3970 | assert(!S.Context.hasSameType(New->getType(), Old->getType()))(static_cast <bool> (!S.Context.hasSameType(New->getType (), Old->getType())) ? void (0) : __assert_fail ("!S.Context.hasSameType(New->getType(), Old->getType())" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 3970, __extension__ __PRETTY_FUNCTION__)); | ||||||
3971 | |||||||
3972 | S.Diag(New->getLocation(), New->isThisDeclarationADefinition() | ||||||
3973 | ? diag::err_redefinition_different_type | ||||||
3974 | : diag::err_redeclaration_different_type) | ||||||
3975 | << New->getDeclName() << New->getType() << Old->getType(); | ||||||
3976 | |||||||
3977 | diag::kind PrevDiag; | ||||||
3978 | SourceLocation OldLocation; | ||||||
3979 | std::tie(PrevDiag, OldLocation) | ||||||
3980 | = getNoteDiagForInvalidRedeclaration(Old, New); | ||||||
3981 | S.Diag(OldLocation, PrevDiag); | ||||||
3982 | New->setInvalidDecl(); | ||||||
3983 | } | ||||||
3984 | |||||||
3985 | /// MergeVarDeclTypes - We parsed a variable 'New' which has the same name and | ||||||
3986 | /// scope as a previous declaration 'Old'. Figure out how to merge their types, | ||||||
3987 | /// emitting diagnostics as appropriate. | ||||||
3988 | /// | ||||||
3989 | /// Declarations using the auto type specifier (C++ [decl.spec.auto]) call back | ||||||
3990 | /// to here in AddInitializerToDecl. We can't check them before the initializer | ||||||
3991 | /// is attached. | ||||||
3992 | void Sema::MergeVarDeclTypes(VarDecl *New, VarDecl *Old, | ||||||
3993 | bool MergeTypeWithOld) { | ||||||
3994 | if (New->isInvalidDecl() || Old->isInvalidDecl()) | ||||||
3995 | return; | ||||||
3996 | |||||||
3997 | QualType MergedT; | ||||||
3998 | if (getLangOpts().CPlusPlus) { | ||||||
3999 | if (New->getType()->isUndeducedType()) { | ||||||
4000 | // We don't know what the new type is until the initializer is attached. | ||||||
4001 | return; | ||||||
4002 | } else if (Context.hasSameType(New->getType(), Old->getType())) { | ||||||
4003 | // These could still be something that needs exception specs checked. | ||||||
4004 | return MergeVarDeclExceptionSpecs(New, Old); | ||||||
4005 | } | ||||||
4006 | // C++ [basic.link]p10: | ||||||
4007 | // [...] the types specified by all declarations referring to a given | ||||||
4008 | // object or function shall be identical, except that declarations for an | ||||||
4009 | // array object can specify array types that differ by the presence or | ||||||
4010 | // absence of a major array bound (8.3.4). | ||||||
4011 | else if (Old->getType()->isArrayType() && New->getType()->isArrayType()) { | ||||||
4012 | const ArrayType *OldArray = Context.getAsArrayType(Old->getType()); | ||||||
4013 | const ArrayType *NewArray = Context.getAsArrayType(New->getType()); | ||||||
4014 | |||||||
4015 | // We are merging a variable declaration New into Old. If it has an array | ||||||
4016 | // bound, and that bound differs from Old's bound, we should diagnose the | ||||||
4017 | // mismatch. | ||||||
4018 | if (!NewArray->isIncompleteArrayType() && !NewArray->isDependentType()) { | ||||||
4019 | for (VarDecl *PrevVD = Old->getMostRecentDecl(); PrevVD; | ||||||
4020 | PrevVD = PrevVD->getPreviousDecl()) { | ||||||
4021 | QualType PrevVDTy = PrevVD->getType(); | ||||||
4022 | if (PrevVDTy->isIncompleteArrayType() || PrevVDTy->isDependentType()) | ||||||
4023 | continue; | ||||||
4024 | |||||||
4025 | if (!Context.hasSameType(New->getType(), PrevVDTy)) | ||||||
4026 | return diagnoseVarDeclTypeMismatch(*this, New, PrevVD); | ||||||
4027 | } | ||||||
4028 | } | ||||||
4029 | |||||||
4030 | if (OldArray->isIncompleteArrayType() && NewArray->isArrayType()) { | ||||||
4031 | if (Context.hasSameType(OldArray->getElementType(), | ||||||
4032 | NewArray->getElementType())) | ||||||
4033 | MergedT = New->getType(); | ||||||
4034 | } | ||||||
4035 | // FIXME: Check visibility. New is hidden but has a complete type. If New | ||||||
4036 | // has no array bound, it should not inherit one from Old, if Old is not | ||||||
4037 | // visible. | ||||||
4038 | else if (OldArray->isArrayType() && NewArray->isIncompleteArrayType()) { | ||||||
4039 | if (Context.hasSameType(OldArray->getElementType(), | ||||||
4040 | NewArray->getElementType())) | ||||||
4041 | MergedT = Old->getType(); | ||||||
4042 | } | ||||||
4043 | } | ||||||
4044 | else if (New->getType()->isObjCObjectPointerType() && | ||||||
4045 | Old->getType()->isObjCObjectPointerType()) { | ||||||
4046 | MergedT = Context.mergeObjCGCQualifiers(New->getType(), | ||||||
4047 | Old->getType()); | ||||||
4048 | } | ||||||
4049 | } else { | ||||||
4050 | // C 6.2.7p2: | ||||||
4051 | // All declarations that refer to the same object or function shall have | ||||||
4052 | // compatible type. | ||||||
4053 | MergedT = Context.mergeTypes(New->getType(), Old->getType()); | ||||||
4054 | } | ||||||
4055 | if (MergedT.isNull()) { | ||||||
4056 | // It's OK if we couldn't merge types if either type is dependent, for a | ||||||
4057 | // block-scope variable. In other cases (static data members of class | ||||||
4058 | // templates, variable templates, ...), we require the types to be | ||||||
4059 | // equivalent. | ||||||
4060 | // FIXME: The C++ standard doesn't say anything about this. | ||||||
4061 | if ((New->getType()->isDependentType() || | ||||||
4062 | Old->getType()->isDependentType()) && New->isLocalVarDecl()) { | ||||||
4063 | // If the old type was dependent, we can't merge with it, so the new type | ||||||
4064 | // becomes dependent for now. We'll reproduce the original type when we | ||||||
4065 | // instantiate the TypeSourceInfo for the variable. | ||||||
4066 | if (!New->getType()->isDependentType() && MergeTypeWithOld) | ||||||
4067 | New->setType(Context.DependentTy); | ||||||
4068 | return; | ||||||
4069 | } | ||||||
4070 | return diagnoseVarDeclTypeMismatch(*this, New, Old); | ||||||
4071 | } | ||||||
4072 | |||||||
4073 | // Don't actually update the type on the new declaration if the old | ||||||
4074 | // declaration was an extern declaration in a different scope. | ||||||
4075 | if (MergeTypeWithOld) | ||||||
4076 | New->setType(MergedT); | ||||||
4077 | } | ||||||
4078 | |||||||
4079 | static bool mergeTypeWithPrevious(Sema &S, VarDecl *NewVD, VarDecl *OldVD, | ||||||
4080 | LookupResult &Previous) { | ||||||
4081 | // C11 6.2.7p4: | ||||||
4082 | // For an identifier with internal or external linkage declared | ||||||
4083 | // in a scope in which a prior declaration of that identifier is | ||||||
4084 | // visible, if the prior declaration specifies internal or | ||||||
4085 | // external linkage, the type of the identifier at the later | ||||||
4086 | // declaration becomes the composite type. | ||||||
4087 | // | ||||||
4088 | // If the variable isn't visible, we do not merge with its type. | ||||||
4089 | if (Previous.isShadowed()) | ||||||
4090 | return false; | ||||||
4091 | |||||||
4092 | if (S.getLangOpts().CPlusPlus) { | ||||||
4093 | // C++11 [dcl.array]p3: | ||||||
4094 | // If there is a preceding declaration of the entity in the same | ||||||
4095 | // scope in which the bound was specified, an omitted array bound | ||||||
4096 | // is taken to be the same as in that earlier declaration. | ||||||
4097 | return NewVD->isPreviousDeclInSameBlockScope() || | ||||||
4098 | (!OldVD->getLexicalDeclContext()->isFunctionOrMethod() && | ||||||
4099 | !NewVD->getLexicalDeclContext()->isFunctionOrMethod()); | ||||||
4100 | } else { | ||||||
4101 | // If the old declaration was function-local, don't merge with its | ||||||
4102 | // type unless we're in the same function. | ||||||
4103 | return !OldVD->getLexicalDeclContext()->isFunctionOrMethod() || | ||||||
4104 | OldVD->getLexicalDeclContext() == NewVD->getLexicalDeclContext(); | ||||||
4105 | } | ||||||
4106 | } | ||||||
4107 | |||||||
4108 | /// MergeVarDecl - We just parsed a variable 'New' which has the same name | ||||||
4109 | /// and scope as a previous declaration 'Old'. Figure out how to resolve this | ||||||
4110 | /// situation, merging decls or emitting diagnostics as appropriate. | ||||||
4111 | /// | ||||||
4112 | /// Tentative definition rules (C99 6.9.2p2) are checked by | ||||||
4113 | /// FinalizeDeclaratorGroup. Unfortunately, we can't analyze tentative | ||||||
4114 | /// definitions here, since the initializer hasn't been attached. | ||||||
4115 | /// | ||||||
4116 | void Sema::MergeVarDecl(VarDecl *New, LookupResult &Previous) { | ||||||
4117 | // If the new decl is already invalid, don't do any other checking. | ||||||
4118 | if (New->isInvalidDecl()) | ||||||
4119 | return; | ||||||
4120 | |||||||
4121 | if (!shouldLinkPossiblyHiddenDecl(Previous, New)) | ||||||
4122 | return; | ||||||
4123 | |||||||
4124 | VarTemplateDecl *NewTemplate = New->getDescribedVarTemplate(); | ||||||
4125 | |||||||
4126 | // Verify the old decl was also a variable or variable template. | ||||||
4127 | VarDecl *Old = nullptr; | ||||||
4128 | VarTemplateDecl *OldTemplate = nullptr; | ||||||
4129 | if (Previous.isSingleResult()) { | ||||||
4130 | if (NewTemplate) { | ||||||
4131 | OldTemplate = dyn_cast<VarTemplateDecl>(Previous.getFoundDecl()); | ||||||
4132 | Old = OldTemplate ? OldTemplate->getTemplatedDecl() : nullptr; | ||||||
4133 | |||||||
4134 | if (auto *Shadow = | ||||||
4135 | dyn_cast<UsingShadowDecl>(Previous.getRepresentativeDecl())) | ||||||
4136 | if (checkUsingShadowRedecl<VarTemplateDecl>(*this, Shadow, NewTemplate)) | ||||||
4137 | return New->setInvalidDecl(); | ||||||
4138 | } else { | ||||||
4139 | Old = dyn_cast<VarDecl>(Previous.getFoundDecl()); | ||||||
4140 | |||||||
4141 | if (auto *Shadow = | ||||||
4142 | dyn_cast<UsingShadowDecl>(Previous.getRepresentativeDecl())) | ||||||
4143 | if (checkUsingShadowRedecl<VarDecl>(*this, Shadow, New)) | ||||||
4144 | return New->setInvalidDecl(); | ||||||
4145 | } | ||||||
4146 | } | ||||||
4147 | if (!Old) { | ||||||
4148 | Diag(New->getLocation(), diag::err_redefinition_different_kind) | ||||||
4149 | << New->getDeclName(); | ||||||
4150 | notePreviousDefinition(Previous.getRepresentativeDecl(), | ||||||
4151 | New->getLocation()); | ||||||
4152 | return New->setInvalidDecl(); | ||||||
4153 | } | ||||||
4154 | |||||||
4155 | // If the old declaration was found in an inline namespace and the new | ||||||
4156 | // declaration was qualified, update the DeclContext to match. | ||||||
4157 | adjustDeclContextForDeclaratorDecl(New, Old); | ||||||
4158 | |||||||
4159 | // Ensure the template parameters are compatible. | ||||||
4160 | if (NewTemplate && | ||||||
4161 | !TemplateParameterListsAreEqual(NewTemplate->getTemplateParameters(), | ||||||
4162 | OldTemplate->getTemplateParameters(), | ||||||
4163 | /*Complain=*/true, TPL_TemplateMatch)) | ||||||
4164 | return New->setInvalidDecl(); | ||||||
4165 | |||||||
4166 | // C++ [class.mem]p1: | ||||||
4167 | // A member shall not be declared twice in the member-specification [...] | ||||||
4168 | // | ||||||
4169 | // Here, we need only consider static data members. | ||||||
4170 | if (Old->isStaticDataMember() && !New->isOutOfLine()) { | ||||||
4171 | Diag(New->getLocation(), diag::err_duplicate_member) | ||||||
4172 | << New->getIdentifier(); | ||||||
4173 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
4174 | New->setInvalidDecl(); | ||||||
4175 | } | ||||||
4176 | |||||||
4177 | mergeDeclAttributes(New, Old); | ||||||
4178 | // Warn if an already-declared variable is made a weak_import in a subsequent | ||||||
4179 | // declaration | ||||||
4180 | if (New->hasAttr<WeakImportAttr>() && | ||||||
4181 | Old->getStorageClass() == SC_None && | ||||||
4182 | !Old->hasAttr<WeakImportAttr>()) { | ||||||
4183 | Diag(New->getLocation(), diag::warn_weak_import) << New->getDeclName(); | ||||||
4184 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
4185 | // Remove weak_import attribute on new declaration. | ||||||
4186 | New->dropAttr<WeakImportAttr>(); | ||||||
4187 | } | ||||||
4188 | |||||||
4189 | if (const auto *ILA = New->getAttr<InternalLinkageAttr>()) | ||||||
4190 | if (!Old->hasAttr<InternalLinkageAttr>()) { | ||||||
4191 | Diag(New->getLocation(), diag::err_attribute_missing_on_first_decl) | ||||||
4192 | << ILA; | ||||||
4193 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
4194 | New->dropAttr<InternalLinkageAttr>(); | ||||||
4195 | } | ||||||
4196 | |||||||
4197 | // Merge the types. | ||||||
4198 | VarDecl *MostRecent = Old->getMostRecentDecl(); | ||||||
4199 | if (MostRecent != Old) { | ||||||
4200 | MergeVarDeclTypes(New, MostRecent, | ||||||
4201 | mergeTypeWithPrevious(*this, New, MostRecent, Previous)); | ||||||
4202 | if (New->isInvalidDecl()) | ||||||
4203 | return; | ||||||
4204 | } | ||||||
4205 | |||||||
4206 | MergeVarDeclTypes(New, Old, mergeTypeWithPrevious(*this, New, Old, Previous)); | ||||||
4207 | if (New->isInvalidDecl()) | ||||||
4208 | return; | ||||||
4209 | |||||||
4210 | diag::kind PrevDiag; | ||||||
4211 | SourceLocation OldLocation; | ||||||
4212 | std::tie(PrevDiag, OldLocation) = | ||||||
4213 | getNoteDiagForInvalidRedeclaration(Old, New); | ||||||
4214 | |||||||
4215 | // [dcl.stc]p8: Check if we have a non-static decl followed by a static. | ||||||
4216 | if (New->getStorageClass() == SC_Static && | ||||||
4217 | !New->isStaticDataMember() && | ||||||
4218 | Old->hasExternalFormalLinkage()) { | ||||||
4219 | if (getLangOpts().MicrosoftExt) { | ||||||
4220 | Diag(New->getLocation(), diag::ext_static_non_static) | ||||||
4221 | << New->getDeclName(); | ||||||
4222 | Diag(OldLocation, PrevDiag); | ||||||
4223 | } else { | ||||||
4224 | Diag(New->getLocation(), diag::err_static_non_static) | ||||||
4225 | << New->getDeclName(); | ||||||
4226 | Diag(OldLocation, PrevDiag); | ||||||
4227 | return New->setInvalidDecl(); | ||||||
4228 | } | ||||||
4229 | } | ||||||
4230 | // C99 6.2.2p4: | ||||||
4231 | // For an identifier declared with the storage-class specifier | ||||||
4232 | // extern in a scope in which a prior declaration of that | ||||||
4233 | // identifier is visible,23) if the prior declaration specifies | ||||||
4234 | // internal or external linkage, the linkage of the identifier at | ||||||
4235 | // the later declaration is the same as the linkage specified at | ||||||
4236 | // the prior declaration. If no prior declaration is visible, or | ||||||
4237 | // if the prior declaration specifies no linkage, then the | ||||||
4238 | // identifier has external linkage. | ||||||
4239 | if (New->hasExternalStorage() && Old->hasLinkage()) | ||||||
4240 | /* Okay */; | ||||||
4241 | else if (New->getCanonicalDecl()->getStorageClass() != SC_Static && | ||||||
4242 | !New->isStaticDataMember() && | ||||||
4243 | Old->getCanonicalDecl()->getStorageClass() == SC_Static) { | ||||||
4244 | Diag(New->getLocation(), diag::err_non_static_static) << New->getDeclName(); | ||||||
4245 | Diag(OldLocation, PrevDiag); | ||||||
4246 | return New->setInvalidDecl(); | ||||||
4247 | } | ||||||
4248 | |||||||
4249 | // Check if extern is followed by non-extern and vice-versa. | ||||||
4250 | if (New->hasExternalStorage() && | ||||||
4251 | !Old->hasLinkage() && Old->isLocalVarDeclOrParm()) { | ||||||
4252 | Diag(New->getLocation(), diag::err_extern_non_extern) << New->getDeclName(); | ||||||
4253 | Diag(OldLocation, PrevDiag); | ||||||
4254 | return New->setInvalidDecl(); | ||||||
4255 | } | ||||||
4256 | if (Old->hasLinkage() && New->isLocalVarDeclOrParm() && | ||||||
4257 | !New->hasExternalStorage()) { | ||||||
4258 | Diag(New->getLocation(), diag::err_non_extern_extern) << New->getDeclName(); | ||||||
4259 | Diag(OldLocation, PrevDiag); | ||||||
4260 | return New->setInvalidDecl(); | ||||||
4261 | } | ||||||
4262 | |||||||
4263 | if (CheckRedeclarationModuleOwnership(New, Old)) | ||||||
4264 | return; | ||||||
4265 | |||||||
4266 | // Variables with external linkage are analyzed in FinalizeDeclaratorGroup. | ||||||
4267 | |||||||
4268 | // FIXME: The test for external storage here seems wrong? We still | ||||||
4269 | // need to check for mismatches. | ||||||
4270 | if (!New->hasExternalStorage() && !New->isFileVarDecl() && | ||||||
4271 | // Don't complain about out-of-line definitions of static members. | ||||||
4272 | !(Old->getLexicalDeclContext()->isRecord() && | ||||||
4273 | !New->getLexicalDeclContext()->isRecord())) { | ||||||
4274 | Diag(New->getLocation(), diag::err_redefinition) << New->getDeclName(); | ||||||
4275 | Diag(OldLocation, PrevDiag); | ||||||
4276 | return New->setInvalidDecl(); | ||||||
4277 | } | ||||||
4278 | |||||||
4279 | if (New->isInline() && !Old->getMostRecentDecl()->isInline()) { | ||||||
4280 | if (VarDecl *Def = Old->getDefinition()) { | ||||||
4281 | // C++1z [dcl.fcn.spec]p4: | ||||||
4282 | // If the definition of a variable appears in a translation unit before | ||||||
4283 | // its first declaration as inline, the program is ill-formed. | ||||||
4284 | Diag(New->getLocation(), diag::err_inline_decl_follows_def) << New; | ||||||
4285 | Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
4286 | } | ||||||
4287 | } | ||||||
4288 | |||||||
4289 | // If this redeclaration makes the variable inline, we may need to add it to | ||||||
4290 | // UndefinedButUsed. | ||||||
4291 | if (!Old->isInline() && New->isInline() && Old->isUsed(false) && | ||||||
4292 | !Old->getDefinition() && !New->isThisDeclarationADefinition()) | ||||||
4293 | UndefinedButUsed.insert(std::make_pair(Old->getCanonicalDecl(), | ||||||
4294 | SourceLocation())); | ||||||
4295 | |||||||
4296 | if (New->getTLSKind() != Old->getTLSKind()) { | ||||||
4297 | if (!Old->getTLSKind()) { | ||||||
4298 | Diag(New->getLocation(), diag::err_thread_non_thread) << New->getDeclName(); | ||||||
4299 | Diag(OldLocation, PrevDiag); | ||||||
4300 | } else if (!New->getTLSKind()) { | ||||||
4301 | Diag(New->getLocation(), diag::err_non_thread_thread) << New->getDeclName(); | ||||||
4302 | Diag(OldLocation, PrevDiag); | ||||||
4303 | } else { | ||||||
4304 | // Do not allow redeclaration to change the variable between requiring | ||||||
4305 | // static and dynamic initialization. | ||||||
4306 | // FIXME: GCC allows this, but uses the TLS keyword on the first | ||||||
4307 | // declaration to determine the kind. Do we need to be compatible here? | ||||||
4308 | Diag(New->getLocation(), diag::err_thread_thread_different_kind) | ||||||
4309 | << New->getDeclName() << (New->getTLSKind() == VarDecl::TLS_Dynamic); | ||||||
4310 | Diag(OldLocation, PrevDiag); | ||||||
4311 | } | ||||||
4312 | } | ||||||
4313 | |||||||
4314 | // C++ doesn't have tentative definitions, so go right ahead and check here. | ||||||
4315 | if (getLangOpts().CPlusPlus && | ||||||
4316 | New->isThisDeclarationADefinition() == VarDecl::Definition) { | ||||||
4317 | if (Old->isStaticDataMember() && Old->getCanonicalDecl()->isInline() && | ||||||
4318 | Old->getCanonicalDecl()->isConstexpr()) { | ||||||
4319 | // This definition won't be a definition any more once it's been merged. | ||||||
4320 | Diag(New->getLocation(), | ||||||
4321 | diag::warn_deprecated_redundant_constexpr_static_def); | ||||||
4322 | } else if (VarDecl *Def = Old->getDefinition()) { | ||||||
4323 | if (checkVarDeclRedefinition(Def, New)) | ||||||
4324 | return; | ||||||
4325 | } | ||||||
4326 | } | ||||||
4327 | |||||||
4328 | if (haveIncompatibleLanguageLinkages(Old, New)) { | ||||||
4329 | Diag(New->getLocation(), diag::err_different_language_linkage) << New; | ||||||
4330 | Diag(OldLocation, PrevDiag); | ||||||
4331 | New->setInvalidDecl(); | ||||||
4332 | return; | ||||||
4333 | } | ||||||
4334 | |||||||
4335 | // Merge "used" flag. | ||||||
4336 | if (Old->getMostRecentDecl()->isUsed(false)) | ||||||
4337 | New->setIsUsed(); | ||||||
4338 | |||||||
4339 | // Keep a chain of previous declarations. | ||||||
4340 | New->setPreviousDecl(Old); | ||||||
4341 | if (NewTemplate) | ||||||
4342 | NewTemplate->setPreviousDecl(OldTemplate); | ||||||
4343 | |||||||
4344 | // Inherit access appropriately. | ||||||
4345 | New->setAccess(Old->getAccess()); | ||||||
4346 | if (NewTemplate) | ||||||
4347 | NewTemplate->setAccess(New->getAccess()); | ||||||
4348 | |||||||
4349 | if (Old->isInline()) | ||||||
4350 | New->setImplicitlyInline(); | ||||||
4351 | } | ||||||
4352 | |||||||
4353 | void Sema::notePreviousDefinition(const NamedDecl *Old, SourceLocation New) { | ||||||
4354 | SourceManager &SrcMgr = getSourceManager(); | ||||||
4355 | auto FNewDecLoc = SrcMgr.getDecomposedLoc(New); | ||||||
4356 | auto FOldDecLoc = SrcMgr.getDecomposedLoc(Old->getLocation()); | ||||||
4357 | auto *FNew = SrcMgr.getFileEntryForID(FNewDecLoc.first); | ||||||
4358 | auto *FOld = SrcMgr.getFileEntryForID(FOldDecLoc.first); | ||||||
4359 | auto &HSI = PP.getHeaderSearchInfo(); | ||||||
4360 | StringRef HdrFilename = | ||||||
4361 | SrcMgr.getFilename(SrcMgr.getSpellingLoc(Old->getLocation())); | ||||||
4362 | |||||||
4363 | auto noteFromModuleOrInclude = [&](Module *Mod, | ||||||
4364 | SourceLocation IncLoc) -> bool { | ||||||
4365 | // Redefinition errors with modules are common with non modular mapped | ||||||
4366 | // headers, example: a non-modular header H in module A that also gets | ||||||
4367 | // included directly in a TU. Pointing twice to the same header/definition | ||||||
4368 | // is confusing, try to get better diagnostics when modules is on. | ||||||
4369 | if (IncLoc.isValid()) { | ||||||
4370 | if (Mod) { | ||||||
4371 | Diag(IncLoc, diag::note_redefinition_modules_same_file) | ||||||
4372 | << HdrFilename.str() << Mod->getFullModuleName(); | ||||||
4373 | if (!Mod->DefinitionLoc.isInvalid()) | ||||||
4374 | Diag(Mod->DefinitionLoc, diag::note_defined_here) | ||||||
4375 | << Mod->getFullModuleName(); | ||||||
4376 | } else { | ||||||
4377 | Diag(IncLoc, diag::note_redefinition_include_same_file) | ||||||
4378 | << HdrFilename.str(); | ||||||
4379 | } | ||||||
4380 | return true; | ||||||
4381 | } | ||||||
4382 | |||||||
4383 | return false; | ||||||
4384 | }; | ||||||
4385 | |||||||
4386 | // Is it the same file and same offset? Provide more information on why | ||||||
4387 | // this leads to a redefinition error. | ||||||
4388 | if (FNew == FOld && FNewDecLoc.second == FOldDecLoc.second) { | ||||||
4389 | SourceLocation OldIncLoc = SrcMgr.getIncludeLoc(FOldDecLoc.first); | ||||||
4390 | SourceLocation NewIncLoc = SrcMgr.getIncludeLoc(FNewDecLoc.first); | ||||||
4391 | bool EmittedDiag = | ||||||
4392 | noteFromModuleOrInclude(Old->getOwningModule(), OldIncLoc); | ||||||
4393 | EmittedDiag |= noteFromModuleOrInclude(getCurrentModule(), NewIncLoc); | ||||||
4394 | |||||||
4395 | // If the header has no guards, emit a note suggesting one. | ||||||
4396 | if (FOld && !HSI.isFileMultipleIncludeGuarded(FOld)) | ||||||
4397 | Diag(Old->getLocation(), diag::note_use_ifdef_guards); | ||||||
4398 | |||||||
4399 | if (EmittedDiag) | ||||||
4400 | return; | ||||||
4401 | } | ||||||
4402 | |||||||
4403 | // Redefinition coming from different files or couldn't do better above. | ||||||
4404 | if (Old->getLocation().isValid()) | ||||||
4405 | Diag(Old->getLocation(), diag::note_previous_definition); | ||||||
4406 | } | ||||||
4407 | |||||||
4408 | /// We've just determined that \p Old and \p New both appear to be definitions | ||||||
4409 | /// of the same variable. Either diagnose or fix the problem. | ||||||
4410 | bool Sema::checkVarDeclRedefinition(VarDecl *Old, VarDecl *New) { | ||||||
4411 | if (!hasVisibleDefinition(Old) && | ||||||
4412 | (New->getFormalLinkage() == InternalLinkage || | ||||||
4413 | New->isInline() || | ||||||
4414 | New->getDescribedVarTemplate() || | ||||||
4415 | New->getNumTemplateParameterLists() || | ||||||
4416 | New->getDeclContext()->isDependentContext())) { | ||||||
4417 | // The previous definition is hidden, and multiple definitions are | ||||||
4418 | // permitted (in separate TUs). Demote this to a declaration. | ||||||
4419 | New->demoteThisDefinitionToDeclaration(); | ||||||
4420 | |||||||
4421 | // Make the canonical definition visible. | ||||||
4422 | if (auto *OldTD = Old->getDescribedVarTemplate()) | ||||||
4423 | makeMergedDefinitionVisible(OldTD); | ||||||
4424 | makeMergedDefinitionVisible(Old); | ||||||
4425 | return false; | ||||||
4426 | } else { | ||||||
4427 | Diag(New->getLocation(), diag::err_redefinition) << New; | ||||||
4428 | notePreviousDefinition(Old, New->getLocation()); | ||||||
4429 | New->setInvalidDecl(); | ||||||
4430 | return true; | ||||||
4431 | } | ||||||
4432 | } | ||||||
4433 | |||||||
4434 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with | ||||||
4435 | /// no declarator (e.g. "struct foo;") is parsed. | ||||||
4436 | Decl * | ||||||
4437 | Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, | ||||||
4438 | RecordDecl *&AnonRecord) { | ||||||
4439 | return ParsedFreeStandingDeclSpec(S, AS, DS, MultiTemplateParamsArg(), false, | ||||||
4440 | AnonRecord); | ||||||
4441 | } | ||||||
4442 | |||||||
4443 | // The MS ABI changed between VS2013 and VS2015 with regard to numbers used to | ||||||
4444 | // disambiguate entities defined in different scopes. | ||||||
4445 | // While the VS2015 ABI fixes potential miscompiles, it is also breaks | ||||||
4446 | // compatibility. | ||||||
4447 | // We will pick our mangling number depending on which version of MSVC is being | ||||||
4448 | // targeted. | ||||||
4449 | static unsigned getMSManglingNumber(const LangOptions &LO, Scope *S) { | ||||||
4450 | return LO.isCompatibleWithMSVC(LangOptions::MSVC2015) | ||||||
4451 | ? S->getMSCurManglingNumber() | ||||||
4452 | : S->getMSLastManglingNumber(); | ||||||
4453 | } | ||||||
4454 | |||||||
4455 | void Sema::handleTagNumbering(const TagDecl *Tag, Scope *TagScope) { | ||||||
4456 | if (!Context.getLangOpts().CPlusPlus) | ||||||
4457 | return; | ||||||
4458 | |||||||
4459 | if (isa<CXXRecordDecl>(Tag->getParent())) { | ||||||
4460 | // If this tag is the direct child of a class, number it if | ||||||
4461 | // it is anonymous. | ||||||
4462 | if (!Tag->getName().empty() || Tag->getTypedefNameForAnonDecl()) | ||||||
4463 | return; | ||||||
4464 | MangleNumberingContext &MCtx = | ||||||
4465 | Context.getManglingNumberContext(Tag->getParent()); | ||||||
4466 | Context.setManglingNumber( | ||||||
4467 | Tag, MCtx.getManglingNumber( | ||||||
4468 | Tag, getMSManglingNumber(getLangOpts(), TagScope))); | ||||||
4469 | return; | ||||||
4470 | } | ||||||
4471 | |||||||
4472 | // If this tag isn't a direct child of a class, number it if it is local. | ||||||
4473 | MangleNumberingContext *MCtx; | ||||||
4474 | Decl *ManglingContextDecl; | ||||||
4475 | std::tie(MCtx, ManglingContextDecl) = | ||||||
4476 | getCurrentMangleNumberContext(Tag->getDeclContext()); | ||||||
4477 | if (MCtx) { | ||||||
4478 | Context.setManglingNumber( | ||||||
4479 | Tag, MCtx->getManglingNumber( | ||||||
4480 | Tag, getMSManglingNumber(getLangOpts(), TagScope))); | ||||||
4481 | } | ||||||
4482 | } | ||||||
4483 | |||||||
4484 | namespace { | ||||||
4485 | struct NonCLikeKind { | ||||||
4486 | enum { | ||||||
4487 | None, | ||||||
4488 | BaseClass, | ||||||
4489 | DefaultMemberInit, | ||||||
4490 | Lambda, | ||||||
4491 | Friend, | ||||||
4492 | OtherMember, | ||||||
4493 | Invalid, | ||||||
4494 | } Kind = None; | ||||||
4495 | SourceRange Range; | ||||||
4496 | |||||||
4497 | explicit operator bool() { return Kind != None; } | ||||||
4498 | }; | ||||||
4499 | } | ||||||
4500 | |||||||
4501 | /// Determine whether a class is C-like, according to the rules of C++ | ||||||
4502 | /// [dcl.typedef] for anonymous classes with typedef names for linkage. | ||||||
4503 | static NonCLikeKind getNonCLikeKindForAnonymousStruct(const CXXRecordDecl *RD) { | ||||||
4504 | if (RD->isInvalidDecl()) | ||||||
4505 | return {NonCLikeKind::Invalid, {}}; | ||||||
4506 | |||||||
4507 | // C++ [dcl.typedef]p9: [P1766R1] | ||||||
4508 | // An unnamed class with a typedef name for linkage purposes shall not | ||||||
4509 | // | ||||||
4510 | // -- have any base classes | ||||||
4511 | if (RD->getNumBases()) | ||||||
4512 | return {NonCLikeKind::BaseClass, | ||||||
4513 | SourceRange(RD->bases_begin()->getBeginLoc(), | ||||||
4514 | RD->bases_end()[-1].getEndLoc())}; | ||||||
4515 | bool Invalid = false; | ||||||
4516 | for (Decl *D : RD->decls()) { | ||||||
4517 | // Don't complain about things we already diagnosed. | ||||||
4518 | if (D->isInvalidDecl()) { | ||||||
4519 | Invalid = true; | ||||||
4520 | continue; | ||||||
4521 | } | ||||||
4522 | |||||||
4523 | // -- have any [...] default member initializers | ||||||
4524 | if (auto *FD = dyn_cast<FieldDecl>(D)) { | ||||||
4525 | if (FD->hasInClassInitializer()) { | ||||||
4526 | auto *Init = FD->getInClassInitializer(); | ||||||
4527 | return {NonCLikeKind::DefaultMemberInit, | ||||||
4528 | Init ? Init->getSourceRange() : D->getSourceRange()}; | ||||||
4529 | } | ||||||
4530 | continue; | ||||||
4531 | } | ||||||
4532 | |||||||
4533 | // FIXME: We don't allow friend declarations. This violates the wording of | ||||||
4534 | // P1766, but not the intent. | ||||||
4535 | if (isa<FriendDecl>(D)) | ||||||
4536 | return {NonCLikeKind::Friend, D->getSourceRange()}; | ||||||
4537 | |||||||
4538 | // -- declare any members other than non-static data members, member | ||||||
4539 | // enumerations, or member classes, | ||||||
4540 | if (isa<StaticAssertDecl>(D) || isa<IndirectFieldDecl>(D) || | ||||||
4541 | isa<EnumDecl>(D)) | ||||||
4542 | continue; | ||||||
4543 | auto *MemberRD = dyn_cast<CXXRecordDecl>(D); | ||||||
4544 | if (!MemberRD) { | ||||||
4545 | if (D->isImplicit()) | ||||||
4546 | continue; | ||||||
4547 | return {NonCLikeKind::OtherMember, D->getSourceRange()}; | ||||||
4548 | } | ||||||
4549 | |||||||
4550 | // -- contain a lambda-expression, | ||||||
4551 | if (MemberRD->isLambda()) | ||||||
4552 | return {NonCLikeKind::Lambda, MemberRD->getSourceRange()}; | ||||||
4553 | |||||||
4554 | // and all member classes shall also satisfy these requirements | ||||||
4555 | // (recursively). | ||||||
4556 | if (MemberRD->isThisDeclarationADefinition()) { | ||||||
4557 | if (auto Kind = getNonCLikeKindForAnonymousStruct(MemberRD)) | ||||||
4558 | return Kind; | ||||||
4559 | } | ||||||
4560 | } | ||||||
4561 | |||||||
4562 | return {Invalid ? NonCLikeKind::Invalid : NonCLikeKind::None, {}}; | ||||||
4563 | } | ||||||
4564 | |||||||
4565 | void Sema::setTagNameForLinkagePurposes(TagDecl *TagFromDeclSpec, | ||||||
4566 | TypedefNameDecl *NewTD) { | ||||||
4567 | if (TagFromDeclSpec->isInvalidDecl()) | ||||||
4568 | return; | ||||||
4569 | |||||||
4570 | // Do nothing if the tag already has a name for linkage purposes. | ||||||
4571 | if (TagFromDeclSpec->hasNameForLinkage()) | ||||||
4572 | return; | ||||||
4573 | |||||||
4574 | // A well-formed anonymous tag must always be a TUK_Definition. | ||||||
4575 | assert(TagFromDeclSpec->isThisDeclarationADefinition())(static_cast <bool> (TagFromDeclSpec->isThisDeclarationADefinition ()) ? void (0) : __assert_fail ("TagFromDeclSpec->isThisDeclarationADefinition()" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 4575, __extension__ __PRETTY_FUNCTION__)); | ||||||
4576 | |||||||
4577 | // The type must match the tag exactly; no qualifiers allowed. | ||||||
4578 | if (!Context.hasSameType(NewTD->getUnderlyingType(), | ||||||
4579 | Context.getTagDeclType(TagFromDeclSpec))) { | ||||||
4580 | if (getLangOpts().CPlusPlus) | ||||||
4581 | Context.addTypedefNameForUnnamedTagDecl(TagFromDeclSpec, NewTD); | ||||||
4582 | return; | ||||||
4583 | } | ||||||
4584 | |||||||
4585 | // C++ [dcl.typedef]p9: [P1766R1, applied as DR] | ||||||
4586 | // An unnamed class with a typedef name for linkage purposes shall [be | ||||||
4587 | // C-like]. | ||||||
4588 | // | ||||||
4589 | // FIXME: Also diagnose if we've already computed the linkage. That ideally | ||||||
4590 | // shouldn't happen, but there are constructs that the language rule doesn't | ||||||
4591 | // disallow for which we can't reasonably avoid computing linkage early. | ||||||
4592 | const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(TagFromDeclSpec); | ||||||
4593 | NonCLikeKind NonCLike = RD ? getNonCLikeKindForAnonymousStruct(RD) | ||||||
4594 | : NonCLikeKind(); | ||||||
4595 | bool ChangesLinkage = TagFromDeclSpec->hasLinkageBeenComputed(); | ||||||
4596 | if (NonCLike || ChangesLinkage) { | ||||||
4597 | if (NonCLike.Kind == NonCLikeKind::Invalid) | ||||||
4598 | return; | ||||||
4599 | |||||||
4600 | unsigned DiagID = diag::ext_non_c_like_anon_struct_in_typedef; | ||||||
4601 | if (ChangesLinkage) { | ||||||
4602 | // If the linkage changes, we can't accept this as an extension. | ||||||
4603 | if (NonCLike.Kind == NonCLikeKind::None) | ||||||
4604 | DiagID = diag::err_typedef_changes_linkage; | ||||||
4605 | else | ||||||
4606 | DiagID = diag::err_non_c_like_anon_struct_in_typedef; | ||||||
4607 | } | ||||||
4608 | |||||||
4609 | SourceLocation FixitLoc = | ||||||
4610 | getLocForEndOfToken(TagFromDeclSpec->getInnerLocStart()); | ||||||
4611 | llvm::SmallString<40> TextToInsert; | ||||||
4612 | TextToInsert += ' '; | ||||||
4613 | TextToInsert += NewTD->getIdentifier()->getName(); | ||||||
4614 | |||||||
4615 | Diag(FixitLoc, DiagID) | ||||||
4616 | << isa<TypeAliasDecl>(NewTD) | ||||||
4617 | << FixItHint::CreateInsertion(FixitLoc, TextToInsert); | ||||||
4618 | if (NonCLike.Kind != NonCLikeKind::None) { | ||||||
4619 | Diag(NonCLike.Range.getBegin(), diag::note_non_c_like_anon_struct) | ||||||
4620 | << NonCLike.Kind - 1 << NonCLike.Range; | ||||||
4621 | } | ||||||
4622 | Diag(NewTD->getLocation(), diag::note_typedef_for_linkage_here) | ||||||
4623 | << NewTD << isa<TypeAliasDecl>(NewTD); | ||||||
4624 | |||||||
4625 | if (ChangesLinkage) | ||||||
4626 | return; | ||||||
4627 | } | ||||||
4628 | |||||||
4629 | // Otherwise, set this as the anon-decl typedef for the tag. | ||||||
4630 | TagFromDeclSpec->setTypedefNameForAnonDecl(NewTD); | ||||||
4631 | } | ||||||
4632 | |||||||
4633 | static unsigned GetDiagnosticTypeSpecifierID(DeclSpec::TST T) { | ||||||
4634 | switch (T) { | ||||||
4635 | case DeclSpec::TST_class: | ||||||
4636 | return 0; | ||||||
4637 | case DeclSpec::TST_struct: | ||||||
4638 | return 1; | ||||||
4639 | case DeclSpec::TST_interface: | ||||||
4640 | return 2; | ||||||
4641 | case DeclSpec::TST_union: | ||||||
4642 | return 3; | ||||||
4643 | case DeclSpec::TST_enum: | ||||||
4644 | return 4; | ||||||
4645 | default: | ||||||
4646 | llvm_unreachable("unexpected type specifier")::llvm::llvm_unreachable_internal("unexpected type specifier" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 4646); | ||||||
4647 | } | ||||||
4648 | } | ||||||
4649 | |||||||
4650 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with | ||||||
4651 | /// no declarator (e.g. "struct foo;") is parsed. It also accepts template | ||||||
4652 | /// parameters to cope with template friend declarations. | ||||||
4653 | Decl * | ||||||
4654 | Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, | ||||||
4655 | MultiTemplateParamsArg TemplateParams, | ||||||
4656 | bool IsExplicitInstantiation, | ||||||
4657 | RecordDecl *&AnonRecord) { | ||||||
4658 | Decl *TagD = nullptr; | ||||||
4659 | TagDecl *Tag = nullptr; | ||||||
4660 | if (DS.getTypeSpecType() == DeclSpec::TST_class || | ||||||
4661 | DS.getTypeSpecType() == DeclSpec::TST_struct || | ||||||
4662 | DS.getTypeSpecType() == DeclSpec::TST_interface || | ||||||
4663 | DS.getTypeSpecType() == DeclSpec::TST_union || | ||||||
4664 | DS.getTypeSpecType() == DeclSpec::TST_enum) { | ||||||
4665 | TagD = DS.getRepAsDecl(); | ||||||
4666 | |||||||
4667 | if (!TagD) // We probably had an error | ||||||
4668 | return nullptr; | ||||||
4669 | |||||||
4670 | // Note that the above type specs guarantee that the | ||||||
4671 | // type rep is a Decl, whereas in many of the others | ||||||
4672 | // it's a Type. | ||||||
4673 | if (isa<TagDecl>(TagD)) | ||||||
4674 | Tag = cast<TagDecl>(TagD); | ||||||
4675 | else if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(TagD)) | ||||||
4676 | Tag = CTD->getTemplatedDecl(); | ||||||
4677 | } | ||||||
4678 | |||||||
4679 | if (Tag) { | ||||||
4680 | handleTagNumbering(Tag, S); | ||||||
4681 | Tag->setFreeStanding(); | ||||||
4682 | if (Tag->isInvalidDecl()) | ||||||
4683 | return Tag; | ||||||
4684 | } | ||||||
4685 | |||||||
4686 | if (unsigned TypeQuals = DS.getTypeQualifiers()) { | ||||||
4687 | // Enforce C99 6.7.3p2: "Types other than pointer types derived from object | ||||||
4688 | // or incomplete types shall not be restrict-qualified." | ||||||
4689 | if (TypeQuals & DeclSpec::TQ_restrict) | ||||||
4690 | Diag(DS.getRestrictSpecLoc(), | ||||||
4691 | diag::err_typecheck_invalid_restrict_not_pointer_noarg) | ||||||
4692 | << DS.getSourceRange(); | ||||||
4693 | } | ||||||
4694 | |||||||
4695 | if (DS.isInlineSpecified()) | ||||||
4696 | Diag(DS.getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
4697 | << getLangOpts().CPlusPlus17; | ||||||
4698 | |||||||
4699 | if (DS.hasConstexprSpecifier()) { | ||||||
4700 | // C++0x [dcl.constexpr]p1: constexpr can only be applied to declarations | ||||||
4701 | // and definitions of functions and variables. | ||||||
4702 | // C++2a [dcl.constexpr]p1: The consteval specifier shall be applied only to | ||||||
4703 | // the declaration of a function or function template | ||||||
4704 | if (Tag) | ||||||
4705 | Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_tag) | ||||||
4706 | << GetDiagnosticTypeSpecifierID(DS.getTypeSpecType()) | ||||||
4707 | << static_cast<int>(DS.getConstexprSpecifier()); | ||||||
4708 | else | ||||||
4709 | Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_wrong_decl_kind) | ||||||
4710 | << static_cast<int>(DS.getConstexprSpecifier()); | ||||||
4711 | // Don't emit warnings after this error. | ||||||
4712 | return TagD; | ||||||
4713 | } | ||||||
4714 | |||||||
4715 | DiagnoseFunctionSpecifiers(DS); | ||||||
4716 | |||||||
4717 | if (DS.isFriendSpecified()) { | ||||||
4718 | // If we're dealing with a decl but not a TagDecl, assume that | ||||||
4719 | // whatever routines created it handled the friendship aspect. | ||||||
4720 | if (TagD && !Tag) | ||||||
4721 | return nullptr; | ||||||
4722 | return ActOnFriendTypeDecl(S, DS, TemplateParams); | ||||||
4723 | } | ||||||
4724 | |||||||
4725 | const CXXScopeSpec &SS = DS.getTypeSpecScope(); | ||||||
4726 | bool IsExplicitSpecialization = | ||||||
4727 | !TemplateParams.empty() && TemplateParams.back()->size() == 0; | ||||||
4728 | if (Tag && SS.isNotEmpty() && !Tag->isCompleteDefinition() && | ||||||
4729 | !IsExplicitInstantiation && !IsExplicitSpecialization && | ||||||
4730 | !isa<ClassTemplatePartialSpecializationDecl>(Tag)) { | ||||||
4731 | // Per C++ [dcl.type.elab]p1, a class declaration cannot have a | ||||||
4732 | // nested-name-specifier unless it is an explicit instantiation | ||||||
4733 | // or an explicit specialization. | ||||||
4734 | // | ||||||
4735 | // FIXME: We allow class template partial specializations here too, per the | ||||||
4736 | // obvious intent of DR1819. | ||||||
4737 | // | ||||||
4738 | // Per C++ [dcl.enum]p1, an opaque-enum-declaration can't either. | ||||||
4739 | Diag(SS.getBeginLoc(), diag::err_standalone_class_nested_name_specifier) | ||||||
4740 | << GetDiagnosticTypeSpecifierID(DS.getTypeSpecType()) << SS.getRange(); | ||||||
4741 | return nullptr; | ||||||
4742 | } | ||||||
4743 | |||||||
4744 | // Track whether this decl-specifier declares anything. | ||||||
4745 | bool DeclaresAnything = true; | ||||||
4746 | |||||||
4747 | // Handle anonymous struct definitions. | ||||||
4748 | if (RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag)) { | ||||||
4749 | if (!Record->getDeclName() && Record->isCompleteDefinition() && | ||||||
4750 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) { | ||||||
4751 | if (getLangOpts().CPlusPlus || | ||||||
4752 | Record->getDeclContext()->isRecord()) { | ||||||
4753 | // If CurContext is a DeclContext that can contain statements, | ||||||
4754 | // RecursiveASTVisitor won't visit the decls that | ||||||
4755 | // BuildAnonymousStructOrUnion() will put into CurContext. | ||||||
4756 | // Also store them here so that they can be part of the | ||||||
4757 | // DeclStmt that gets created in this case. | ||||||
4758 | // FIXME: Also return the IndirectFieldDecls created by | ||||||
4759 | // BuildAnonymousStructOr union, for the same reason? | ||||||
4760 | if (CurContext->isFunctionOrMethod()) | ||||||
4761 | AnonRecord = Record; | ||||||
4762 | return BuildAnonymousStructOrUnion(S, DS, AS, Record, | ||||||
4763 | Context.getPrintingPolicy()); | ||||||
4764 | } | ||||||
4765 | |||||||
4766 | DeclaresAnything = false; | ||||||
4767 | } | ||||||
4768 | } | ||||||
4769 | |||||||
4770 | // C11 6.7.2.1p2: | ||||||
4771 | // A struct-declaration that does not declare an anonymous structure or | ||||||
4772 | // anonymous union shall contain a struct-declarator-list. | ||||||
4773 | // | ||||||
4774 | // This rule also existed in C89 and C99; the grammar for struct-declaration | ||||||
4775 | // did not permit a struct-declaration without a struct-declarator-list. | ||||||
4776 | if (!getLangOpts().CPlusPlus && CurContext->isRecord() && | ||||||
4777 | DS.getStorageClassSpec() == DeclSpec::SCS_unspecified) { | ||||||
4778 | // Check for Microsoft C extension: anonymous struct/union member. | ||||||
4779 | // Handle 2 kinds of anonymous struct/union: | ||||||
4780 | // struct STRUCT; | ||||||
4781 | // union UNION; | ||||||
4782 | // and | ||||||
4783 | // STRUCT_TYPE; <- where STRUCT_TYPE is a typedef struct. | ||||||
4784 | // UNION_TYPE; <- where UNION_TYPE is a typedef union. | ||||||
4785 | if ((Tag && Tag->getDeclName()) || | ||||||
4786 | DS.getTypeSpecType() == DeclSpec::TST_typename) { | ||||||
4787 | RecordDecl *Record = nullptr; | ||||||
4788 | if (Tag) | ||||||
4789 | Record = dyn_cast<RecordDecl>(Tag); | ||||||
4790 | else if (const RecordType *RT = | ||||||
4791 | DS.getRepAsType().get()->getAsStructureType()) | ||||||
4792 | Record = RT->getDecl(); | ||||||
4793 | else if (const RecordType *UT = DS.getRepAsType().get()->getAsUnionType()) | ||||||
4794 | Record = UT->getDecl(); | ||||||
4795 | |||||||
4796 | if (Record && getLangOpts().MicrosoftExt) { | ||||||
4797 | Diag(DS.getBeginLoc(), diag::ext_ms_anonymous_record) | ||||||
4798 | << Record->isUnion() << DS.getSourceRange(); | ||||||
4799 | return BuildMicrosoftCAnonymousStruct(S, DS, Record); | ||||||
4800 | } | ||||||
4801 | |||||||
4802 | DeclaresAnything = false; | ||||||
4803 | } | ||||||
4804 | } | ||||||
4805 | |||||||
4806 | // Skip all the checks below if we have a type error. | ||||||
4807 | if (DS.getTypeSpecType() == DeclSpec::TST_error || | ||||||
4808 | (TagD && TagD->isInvalidDecl())) | ||||||
4809 | return TagD; | ||||||
4810 | |||||||
4811 | if (getLangOpts().CPlusPlus && | ||||||
4812 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) | ||||||
4813 | if (EnumDecl *Enum = dyn_cast_or_null<EnumDecl>(Tag)) | ||||||
4814 | if (Enum->enumerator_begin() == Enum->enumerator_end() && | ||||||
4815 | !Enum->getIdentifier() && !Enum->isInvalidDecl()) | ||||||
4816 | DeclaresAnything = false; | ||||||
4817 | |||||||
4818 | if (!DS.isMissingDeclaratorOk()) { | ||||||
4819 | // Customize diagnostic for a typedef missing a name. | ||||||
4820 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||||
4821 | Diag(DS.getBeginLoc(), diag::ext_typedef_without_a_name) | ||||||
4822 | << DS.getSourceRange(); | ||||||
4823 | else | ||||||
4824 | DeclaresAnything = false; | ||||||
4825 | } | ||||||
4826 | |||||||
4827 | if (DS.isModulePrivateSpecified() && | ||||||
4828 | Tag && Tag->getDeclContext()->isFunctionOrMethod()) | ||||||
4829 | Diag(DS.getModulePrivateSpecLoc(), diag::err_module_private_local_class) | ||||||
4830 | << Tag->getTagKind() | ||||||
4831 | << FixItHint::CreateRemoval(DS.getModulePrivateSpecLoc()); | ||||||
4832 | |||||||
4833 | ActOnDocumentableDecl(TagD); | ||||||
4834 | |||||||
4835 | // C 6.7/2: | ||||||
4836 | // A declaration [...] shall declare at least a declarator [...], a tag, | ||||||
4837 | // or the members of an enumeration. | ||||||
4838 | // C++ [dcl.dcl]p3: | ||||||
4839 | // [If there are no declarators], and except for the declaration of an | ||||||
4840 | // unnamed bit-field, the decl-specifier-seq shall introduce one or more | ||||||
4841 | // names into the program, or shall redeclare a name introduced by a | ||||||
4842 | // previous declaration. | ||||||
4843 | if (!DeclaresAnything) { | ||||||
4844 | // In C, we allow this as a (popular) extension / bug. Don't bother | ||||||
4845 | // producing further diagnostics for redundant qualifiers after this. | ||||||
4846 | Diag(DS.getBeginLoc(), (IsExplicitInstantiation || !TemplateParams.empty()) | ||||||
4847 | ? diag::err_no_declarators | ||||||
4848 | : diag::ext_no_declarators) | ||||||
4849 | << DS.getSourceRange(); | ||||||
4850 | return TagD; | ||||||
4851 | } | ||||||
4852 | |||||||
4853 | // C++ [dcl.stc]p1: | ||||||
4854 | // If a storage-class-specifier appears in a decl-specifier-seq, [...] the | ||||||
4855 | // init-declarator-list of the declaration shall not be empty. | ||||||
4856 | // C++ [dcl.fct.spec]p1: | ||||||
4857 | // If a cv-qualifier appears in a decl-specifier-seq, the | ||||||
4858 | // init-declarator-list of the declaration shall not be empty. | ||||||
4859 | // | ||||||
4860 | // Spurious qualifiers here appear to be valid in C. | ||||||
4861 | unsigned DiagID = diag::warn_standalone_specifier; | ||||||
4862 | if (getLangOpts().CPlusPlus) | ||||||
4863 | DiagID = diag::ext_standalone_specifier; | ||||||
4864 | |||||||
4865 | // Note that a linkage-specification sets a storage class, but | ||||||
4866 | // 'extern "C" struct foo;' is actually valid and not theoretically | ||||||
4867 | // useless. | ||||||
4868 | if (DeclSpec::SCS SCS = DS.getStorageClassSpec()) { | ||||||
4869 | if (SCS == DeclSpec::SCS_mutable) | ||||||
4870 | // Since mutable is not a viable storage class specifier in C, there is | ||||||
4871 | // no reason to treat it as an extension. Instead, diagnose as an error. | ||||||
4872 | Diag(DS.getStorageClassSpecLoc(), diag::err_mutable_nonmember); | ||||||
4873 | else if (!DS.isExternInLinkageSpec() && SCS != DeclSpec::SCS_typedef) | ||||||
4874 | Diag(DS.getStorageClassSpecLoc(), DiagID) | ||||||
4875 | << DeclSpec::getSpecifierName(SCS); | ||||||
4876 | } | ||||||
4877 | |||||||
4878 | if (DeclSpec::TSCS TSCS = DS.getThreadStorageClassSpec()) | ||||||
4879 | Diag(DS.getThreadStorageClassSpecLoc(), DiagID) | ||||||
4880 | << DeclSpec::getSpecifierName(TSCS); | ||||||
4881 | if (DS.getTypeQualifiers()) { | ||||||
4882 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) | ||||||
4883 | Diag(DS.getConstSpecLoc(), DiagID) << "const"; | ||||||
4884 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) | ||||||
4885 | Diag(DS.getConstSpecLoc(), DiagID) << "volatile"; | ||||||
4886 | // Restrict is covered above. | ||||||
4887 | if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic) | ||||||
4888 | Diag(DS.getAtomicSpecLoc(), DiagID) << "_Atomic"; | ||||||
4889 | if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned) | ||||||
4890 | Diag(DS.getUnalignedSpecLoc(), DiagID) << "__unaligned"; | ||||||
4891 | } | ||||||
4892 | |||||||
4893 | // Warn about ignored type attributes, for example: | ||||||
4894 | // __attribute__((aligned)) struct A; | ||||||
4895 | // Attributes should be placed after tag to apply to type declaration. | ||||||
4896 | if (!DS.getAttributes().empty()) { | ||||||
4897 | DeclSpec::TST TypeSpecType = DS.getTypeSpecType(); | ||||||
4898 | if (TypeSpecType == DeclSpec::TST_class || | ||||||
4899 | TypeSpecType == DeclSpec::TST_struct || | ||||||
4900 | TypeSpecType == DeclSpec::TST_interface || | ||||||
4901 | TypeSpecType == DeclSpec::TST_union || | ||||||
4902 | TypeSpecType == DeclSpec::TST_enum) { | ||||||
4903 | for (const ParsedAttr &AL : DS.getAttributes()) | ||||||
4904 | Diag(AL.getLoc(), diag::warn_declspec_attribute_ignored) | ||||||
4905 | << AL << GetDiagnosticTypeSpecifierID(TypeSpecType); | ||||||
4906 | } | ||||||
4907 | } | ||||||
4908 | |||||||
4909 | return TagD; | ||||||
4910 | } | ||||||
4911 | |||||||
4912 | /// We are trying to inject an anonymous member into the given scope; | ||||||
4913 | /// check if there's an existing declaration that can't be overloaded. | ||||||
4914 | /// | ||||||
4915 | /// \return true if this is a forbidden redeclaration | ||||||
4916 | static bool CheckAnonMemberRedeclaration(Sema &SemaRef, | ||||||
4917 | Scope *S, | ||||||
4918 | DeclContext *Owner, | ||||||
4919 | DeclarationName Name, | ||||||
4920 | SourceLocation NameLoc, | ||||||
4921 | bool IsUnion) { | ||||||
4922 | LookupResult R(SemaRef, Name, NameLoc, Sema::LookupMemberName, | ||||||
4923 | Sema::ForVisibleRedeclaration); | ||||||
4924 | if (!SemaRef.LookupName(R, S)) return false; | ||||||
4925 | |||||||
4926 | // Pick a representative declaration. | ||||||
4927 | NamedDecl *PrevDecl = R.getRepresentativeDecl()->getUnderlyingDecl(); | ||||||
4928 | assert(PrevDecl && "Expected a non-null Decl")(static_cast <bool> (PrevDecl && "Expected a non-null Decl" ) ? void (0) : __assert_fail ("PrevDecl && \"Expected a non-null Decl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 4928, __extension__ __PRETTY_FUNCTION__)); | ||||||
4929 | |||||||
4930 | if (!SemaRef.isDeclInScope(PrevDecl, Owner, S)) | ||||||
4931 | return false; | ||||||
4932 | |||||||
4933 | SemaRef.Diag(NameLoc, diag::err_anonymous_record_member_redecl) | ||||||
4934 | << IsUnion << Name; | ||||||
4935 | SemaRef.Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
4936 | |||||||
4937 | return true; | ||||||
4938 | } | ||||||
4939 | |||||||
4940 | /// InjectAnonymousStructOrUnionMembers - Inject the members of the | ||||||
4941 | /// anonymous struct or union AnonRecord into the owning context Owner | ||||||
4942 | /// and scope S. This routine will be invoked just after we realize | ||||||
4943 | /// that an unnamed union or struct is actually an anonymous union or | ||||||
4944 | /// struct, e.g., | ||||||
4945 | /// | ||||||
4946 | /// @code | ||||||
4947 | /// union { | ||||||
4948 | /// int i; | ||||||
4949 | /// float f; | ||||||
4950 | /// }; // InjectAnonymousStructOrUnionMembers called here to inject i and | ||||||
4951 | /// // f into the surrounding scope.x | ||||||
4952 | /// @endcode | ||||||
4953 | /// | ||||||
4954 | /// This routine is recursive, injecting the names of nested anonymous | ||||||
4955 | /// structs/unions into the owning context and scope as well. | ||||||
4956 | static bool | ||||||
4957 | InjectAnonymousStructOrUnionMembers(Sema &SemaRef, Scope *S, DeclContext *Owner, | ||||||
4958 | RecordDecl *AnonRecord, AccessSpecifier AS, | ||||||
4959 | SmallVectorImpl<NamedDecl *> &Chaining) { | ||||||
4960 | bool Invalid = false; | ||||||
4961 | |||||||
4962 | // Look every FieldDecl and IndirectFieldDecl with a name. | ||||||
4963 | for (auto *D : AnonRecord->decls()) { | ||||||
4964 | if ((isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D)) && | ||||||
4965 | cast<NamedDecl>(D)->getDeclName()) { | ||||||
4966 | ValueDecl *VD = cast<ValueDecl>(D); | ||||||
4967 | if (CheckAnonMemberRedeclaration(SemaRef, S, Owner, VD->getDeclName(), | ||||||
4968 | VD->getLocation(), | ||||||
4969 | AnonRecord->isUnion())) { | ||||||
4970 | // C++ [class.union]p2: | ||||||
4971 | // The names of the members of an anonymous union shall be | ||||||
4972 | // distinct from the names of any other entity in the | ||||||
4973 | // scope in which the anonymous union is declared. | ||||||
4974 | Invalid = true; | ||||||
4975 | } else { | ||||||
4976 | // C++ [class.union]p2: | ||||||
4977 | // For the purpose of name lookup, after the anonymous union | ||||||
4978 | // definition, the members of the anonymous union are | ||||||
4979 | // considered to have been defined in the scope in which the | ||||||
4980 | // anonymous union is declared. | ||||||
4981 | unsigned OldChainingSize = Chaining.size(); | ||||||
4982 | if (IndirectFieldDecl *IF = dyn_cast<IndirectFieldDecl>(VD)) | ||||||
4983 | Chaining.append(IF->chain_begin(), IF->chain_end()); | ||||||
4984 | else | ||||||
4985 | Chaining.push_back(VD); | ||||||
4986 | |||||||
4987 | assert(Chaining.size() >= 2)(static_cast <bool> (Chaining.size() >= 2) ? void (0 ) : __assert_fail ("Chaining.size() >= 2", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 4987, __extension__ __PRETTY_FUNCTION__)); | ||||||
4988 | NamedDecl **NamedChain = | ||||||
4989 | new (SemaRef.Context)NamedDecl*[Chaining.size()]; | ||||||
4990 | for (unsigned i = 0; i < Chaining.size(); i++) | ||||||
4991 | NamedChain[i] = Chaining[i]; | ||||||
4992 | |||||||
4993 | IndirectFieldDecl *IndirectField = IndirectFieldDecl::Create( | ||||||
4994 | SemaRef.Context, Owner, VD->getLocation(), VD->getIdentifier(), | ||||||
4995 | VD->getType(), {NamedChain, Chaining.size()}); | ||||||
4996 | |||||||
4997 | for (const auto *Attr : VD->attrs()) | ||||||
4998 | IndirectField->addAttr(Attr->clone(SemaRef.Context)); | ||||||
4999 | |||||||
5000 | IndirectField->setAccess(AS); | ||||||
5001 | IndirectField->setImplicit(); | ||||||
5002 | SemaRef.PushOnScopeChains(IndirectField, S); | ||||||
5003 | |||||||
5004 | // That includes picking up the appropriate access specifier. | ||||||
5005 | if (AS != AS_none) IndirectField->setAccess(AS); | ||||||
5006 | |||||||
5007 | Chaining.resize(OldChainingSize); | ||||||
5008 | } | ||||||
5009 | } | ||||||
5010 | } | ||||||
5011 | |||||||
5012 | return Invalid; | ||||||
5013 | } | ||||||
5014 | |||||||
5015 | /// StorageClassSpecToVarDeclStorageClass - Maps a DeclSpec::SCS to | ||||||
5016 | /// a VarDecl::StorageClass. Any error reporting is up to the caller: | ||||||
5017 | /// illegal input values are mapped to SC_None. | ||||||
5018 | static StorageClass | ||||||
5019 | StorageClassSpecToVarDeclStorageClass(const DeclSpec &DS) { | ||||||
5020 | DeclSpec::SCS StorageClassSpec = DS.getStorageClassSpec(); | ||||||
5021 | assert(StorageClassSpec != DeclSpec::SCS_typedef &&(static_cast <bool> (StorageClassSpec != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class VarDecl." ) ? void (0) : __assert_fail ("StorageClassSpec != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class VarDecl.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5022, __extension__ __PRETTY_FUNCTION__)) | ||||||
5022 | "Parser allowed 'typedef' as storage class VarDecl.")(static_cast <bool> (StorageClassSpec != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class VarDecl." ) ? void (0) : __assert_fail ("StorageClassSpec != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class VarDecl.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5022, __extension__ __PRETTY_FUNCTION__)); | ||||||
5023 | switch (StorageClassSpec) { | ||||||
5024 | case DeclSpec::SCS_unspecified: return SC_None; | ||||||
5025 | case DeclSpec::SCS_extern: | ||||||
5026 | if (DS.isExternInLinkageSpec()) | ||||||
5027 | return SC_None; | ||||||
5028 | return SC_Extern; | ||||||
5029 | case DeclSpec::SCS_static: return SC_Static; | ||||||
5030 | case DeclSpec::SCS_auto: return SC_Auto; | ||||||
5031 | case DeclSpec::SCS_register: return SC_Register; | ||||||
5032 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; | ||||||
5033 | // Illegal SCSs map to None: error reporting is up to the caller. | ||||||
5034 | case DeclSpec::SCS_mutable: // Fall through. | ||||||
5035 | case DeclSpec::SCS_typedef: return SC_None; | ||||||
5036 | } | ||||||
5037 | llvm_unreachable("unknown storage class specifier")::llvm::llvm_unreachable_internal("unknown storage class specifier" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5037); | ||||||
5038 | } | ||||||
5039 | |||||||
5040 | static SourceLocation findDefaultInitializer(const CXXRecordDecl *Record) { | ||||||
5041 | assert(Record->hasInClassInitializer())(static_cast <bool> (Record->hasInClassInitializer() ) ? void (0) : __assert_fail ("Record->hasInClassInitializer()" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5041, __extension__ __PRETTY_FUNCTION__)); | ||||||
5042 | |||||||
5043 | for (const auto *I : Record->decls()) { | ||||||
5044 | const auto *FD = dyn_cast<FieldDecl>(I); | ||||||
5045 | if (const auto *IFD = dyn_cast<IndirectFieldDecl>(I)) | ||||||
5046 | FD = IFD->getAnonField(); | ||||||
5047 | if (FD && FD->hasInClassInitializer()) | ||||||
5048 | return FD->getLocation(); | ||||||
5049 | } | ||||||
5050 | |||||||
5051 | llvm_unreachable("couldn't find in-class initializer")::llvm::llvm_unreachable_internal("couldn't find in-class initializer" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5051); | ||||||
5052 | } | ||||||
5053 | |||||||
5054 | static void checkDuplicateDefaultInit(Sema &S, CXXRecordDecl *Parent, | ||||||
5055 | SourceLocation DefaultInitLoc) { | ||||||
5056 | if (!Parent->isUnion() || !Parent->hasInClassInitializer()) | ||||||
5057 | return; | ||||||
5058 | |||||||
5059 | S.Diag(DefaultInitLoc, diag::err_multiple_mem_union_initialization); | ||||||
5060 | S.Diag(findDefaultInitializer(Parent), diag::note_previous_initializer) << 0; | ||||||
5061 | } | ||||||
5062 | |||||||
5063 | static void checkDuplicateDefaultInit(Sema &S, CXXRecordDecl *Parent, | ||||||
5064 | CXXRecordDecl *AnonUnion) { | ||||||
5065 | if (!Parent->isUnion() || !Parent->hasInClassInitializer()) | ||||||
5066 | return; | ||||||
5067 | |||||||
5068 | checkDuplicateDefaultInit(S, Parent, findDefaultInitializer(AnonUnion)); | ||||||
5069 | } | ||||||
5070 | |||||||
5071 | /// BuildAnonymousStructOrUnion - Handle the declaration of an | ||||||
5072 | /// anonymous structure or union. Anonymous unions are a C++ feature | ||||||
5073 | /// (C++ [class.union]) and a C11 feature; anonymous structures | ||||||
5074 | /// are a C11 feature and GNU C++ extension. | ||||||
5075 | Decl *Sema::BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, | ||||||
5076 | AccessSpecifier AS, | ||||||
5077 | RecordDecl *Record, | ||||||
5078 | const PrintingPolicy &Policy) { | ||||||
5079 | DeclContext *Owner = Record->getDeclContext(); | ||||||
5080 | |||||||
5081 | // Diagnose whether this anonymous struct/union is an extension. | ||||||
5082 | if (Record->isUnion() && !getLangOpts().CPlusPlus && !getLangOpts().C11) | ||||||
5083 | Diag(Record->getLocation(), diag::ext_anonymous_union); | ||||||
5084 | else if (!Record->isUnion() && getLangOpts().CPlusPlus) | ||||||
5085 | Diag(Record->getLocation(), diag::ext_gnu_anonymous_struct); | ||||||
5086 | else if (!Record->isUnion() && !getLangOpts().C11) | ||||||
5087 | Diag(Record->getLocation(), diag::ext_c11_anonymous_struct); | ||||||
5088 | |||||||
5089 | // C and C++ require different kinds of checks for anonymous | ||||||
5090 | // structs/unions. | ||||||
5091 | bool Invalid = false; | ||||||
5092 | if (getLangOpts().CPlusPlus) { | ||||||
5093 | const char *PrevSpec = nullptr; | ||||||
5094 | if (Record->isUnion()) { | ||||||
5095 | // C++ [class.union]p6: | ||||||
5096 | // C++17 [class.union.anon]p2: | ||||||
5097 | // Anonymous unions declared in a named namespace or in the | ||||||
5098 | // global namespace shall be declared static. | ||||||
5099 | unsigned DiagID; | ||||||
5100 | DeclContext *OwnerScope = Owner->getRedeclContext(); | ||||||
5101 | if (DS.getStorageClassSpec() != DeclSpec::SCS_static && | ||||||
5102 | (OwnerScope->isTranslationUnit() || | ||||||
5103 | (OwnerScope->isNamespace() && | ||||||
5104 | !cast<NamespaceDecl>(OwnerScope)->isAnonymousNamespace()))) { | ||||||
5105 | Diag(Record->getLocation(), diag::err_anonymous_union_not_static) | ||||||
5106 | << FixItHint::CreateInsertion(Record->getLocation(), "static "); | ||||||
5107 | |||||||
5108 | // Recover by adding 'static'. | ||||||
5109 | DS.SetStorageClassSpec(*this, DeclSpec::SCS_static, SourceLocation(), | ||||||
5110 | PrevSpec, DiagID, Policy); | ||||||
5111 | } | ||||||
5112 | // C++ [class.union]p6: | ||||||
5113 | // A storage class is not allowed in a declaration of an | ||||||
5114 | // anonymous union in a class scope. | ||||||
5115 | else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && | ||||||
5116 | isa<RecordDecl>(Owner)) { | ||||||
5117 | Diag(DS.getStorageClassSpecLoc(), | ||||||
5118 | diag::err_anonymous_union_with_storage_spec) | ||||||
5119 | << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); | ||||||
5120 | |||||||
5121 | // Recover by removing the storage specifier. | ||||||
5122 | DS.SetStorageClassSpec(*this, DeclSpec::SCS_unspecified, | ||||||
5123 | SourceLocation(), | ||||||
5124 | PrevSpec, DiagID, Context.getPrintingPolicy()); | ||||||
5125 | } | ||||||
5126 | } | ||||||
5127 | |||||||
5128 | // Ignore const/volatile/restrict qualifiers. | ||||||
5129 | if (DS.getTypeQualifiers()) { | ||||||
5130 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) | ||||||
5131 | Diag(DS.getConstSpecLoc(), diag::ext_anonymous_struct_union_qualified) | ||||||
5132 | << Record->isUnion() << "const" | ||||||
5133 | << FixItHint::CreateRemoval(DS.getConstSpecLoc()); | ||||||
5134 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) | ||||||
5135 | Diag(DS.getVolatileSpecLoc(), | ||||||
5136 | diag::ext_anonymous_struct_union_qualified) | ||||||
5137 | << Record->isUnion() << "volatile" | ||||||
5138 | << FixItHint::CreateRemoval(DS.getVolatileSpecLoc()); | ||||||
5139 | if (DS.getTypeQualifiers() & DeclSpec::TQ_restrict) | ||||||
5140 | Diag(DS.getRestrictSpecLoc(), | ||||||
5141 | diag::ext_anonymous_struct_union_qualified) | ||||||
5142 | << Record->isUnion() << "restrict" | ||||||
5143 | << FixItHint::CreateRemoval(DS.getRestrictSpecLoc()); | ||||||
5144 | if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic) | ||||||
5145 | Diag(DS.getAtomicSpecLoc(), | ||||||
5146 | diag::ext_anonymous_struct_union_qualified) | ||||||
5147 | << Record->isUnion() << "_Atomic" | ||||||
5148 | << FixItHint::CreateRemoval(DS.getAtomicSpecLoc()); | ||||||
5149 | if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned) | ||||||
5150 | Diag(DS.getUnalignedSpecLoc(), | ||||||
5151 | diag::ext_anonymous_struct_union_qualified) | ||||||
5152 | << Record->isUnion() << "__unaligned" | ||||||
5153 | << FixItHint::CreateRemoval(DS.getUnalignedSpecLoc()); | ||||||
5154 | |||||||
5155 | DS.ClearTypeQualifiers(); | ||||||
5156 | } | ||||||
5157 | |||||||
5158 | // C++ [class.union]p2: | ||||||
5159 | // The member-specification of an anonymous union shall only | ||||||
5160 | // define non-static data members. [Note: nested types and | ||||||
5161 | // functions cannot be declared within an anonymous union. ] | ||||||
5162 | for (auto *Mem : Record->decls()) { | ||||||
5163 | // Ignore invalid declarations; we already diagnosed them. | ||||||
5164 | if (Mem->isInvalidDecl()) | ||||||
5165 | continue; | ||||||
5166 | |||||||
5167 | if (auto *FD = dyn_cast<FieldDecl>(Mem)) { | ||||||
5168 | // C++ [class.union]p3: | ||||||
5169 | // An anonymous union shall not have private or protected | ||||||
5170 | // members (clause 11). | ||||||
5171 | assert(FD->getAccess() != AS_none)(static_cast <bool> (FD->getAccess() != AS_none) ? void (0) : __assert_fail ("FD->getAccess() != AS_none", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5171, __extension__ __PRETTY_FUNCTION__)); | ||||||
5172 | if (FD->getAccess() != AS_public) { | ||||||
5173 | Diag(FD->getLocation(), diag::err_anonymous_record_nonpublic_member) | ||||||
5174 | << Record->isUnion() << (FD->getAccess() == AS_protected); | ||||||
5175 | Invalid = true; | ||||||
5176 | } | ||||||
5177 | |||||||
5178 | // C++ [class.union]p1 | ||||||
5179 | // An object of a class with a non-trivial constructor, a non-trivial | ||||||
5180 | // copy constructor, a non-trivial destructor, or a non-trivial copy | ||||||
5181 | // assignment operator cannot be a member of a union, nor can an | ||||||
5182 | // array of such objects. | ||||||
5183 | if (CheckNontrivialField(FD)) | ||||||
5184 | Invalid = true; | ||||||
5185 | } else if (Mem->isImplicit()) { | ||||||
5186 | // Any implicit members are fine. | ||||||
5187 | } else if (isa<TagDecl>(Mem) && Mem->getDeclContext() != Record) { | ||||||
5188 | // This is a type that showed up in an | ||||||
5189 | // elaborated-type-specifier inside the anonymous struct or | ||||||
5190 | // union, but which actually declares a type outside of the | ||||||
5191 | // anonymous struct or union. It's okay. | ||||||
5192 | } else if (auto *MemRecord = dyn_cast<RecordDecl>(Mem)) { | ||||||
5193 | if (!MemRecord->isAnonymousStructOrUnion() && | ||||||
5194 | MemRecord->getDeclName()) { | ||||||
5195 | // Visual C++ allows type definition in anonymous struct or union. | ||||||
5196 | if (getLangOpts().MicrosoftExt) | ||||||
5197 | Diag(MemRecord->getLocation(), diag::ext_anonymous_record_with_type) | ||||||
5198 | << Record->isUnion(); | ||||||
5199 | else { | ||||||
5200 | // This is a nested type declaration. | ||||||
5201 | Diag(MemRecord->getLocation(), diag::err_anonymous_record_with_type) | ||||||
5202 | << Record->isUnion(); | ||||||
5203 | Invalid = true; | ||||||
5204 | } | ||||||
5205 | } else { | ||||||
5206 | // This is an anonymous type definition within another anonymous type. | ||||||
5207 | // This is a popular extension, provided by Plan9, MSVC and GCC, but | ||||||
5208 | // not part of standard C++. | ||||||
5209 | Diag(MemRecord->getLocation(), | ||||||
5210 | diag::ext_anonymous_record_with_anonymous_type) | ||||||
5211 | << Record->isUnion(); | ||||||
5212 | } | ||||||
5213 | } else if (isa<AccessSpecDecl>(Mem)) { | ||||||
5214 | // Any access specifier is fine. | ||||||
5215 | } else if (isa<StaticAssertDecl>(Mem)) { | ||||||
5216 | // In C++1z, static_assert declarations are also fine. | ||||||
5217 | } else { | ||||||
5218 | // We have something that isn't a non-static data | ||||||
5219 | // member. Complain about it. | ||||||
5220 | unsigned DK = diag::err_anonymous_record_bad_member; | ||||||
5221 | if (isa<TypeDecl>(Mem)) | ||||||
5222 | DK = diag::err_anonymous_record_with_type; | ||||||
5223 | else if (isa<FunctionDecl>(Mem)) | ||||||
5224 | DK = diag::err_anonymous_record_with_function; | ||||||
5225 | else if (isa<VarDecl>(Mem)) | ||||||
5226 | DK = diag::err_anonymous_record_with_static; | ||||||
5227 | |||||||
5228 | // Visual C++ allows type definition in anonymous struct or union. | ||||||
5229 | if (getLangOpts().MicrosoftExt && | ||||||
5230 | DK == diag::err_anonymous_record_with_type) | ||||||
5231 | Diag(Mem->getLocation(), diag::ext_anonymous_record_with_type) | ||||||
5232 | << Record->isUnion(); | ||||||
5233 | else { | ||||||
5234 | Diag(Mem->getLocation(), DK) << Record->isUnion(); | ||||||
5235 | Invalid = true; | ||||||
5236 | } | ||||||
5237 | } | ||||||
5238 | } | ||||||
5239 | |||||||
5240 | // C++11 [class.union]p8 (DR1460): | ||||||
5241 | // At most one variant member of a union may have a | ||||||
5242 | // brace-or-equal-initializer. | ||||||
5243 | if (cast<CXXRecordDecl>(Record)->hasInClassInitializer() && | ||||||
5244 | Owner->isRecord()) | ||||||
5245 | checkDuplicateDefaultInit(*this, cast<CXXRecordDecl>(Owner), | ||||||
5246 | cast<CXXRecordDecl>(Record)); | ||||||
5247 | } | ||||||
5248 | |||||||
5249 | if (!Record->isUnion() && !Owner->isRecord()) { | ||||||
5250 | Diag(Record->getLocation(), diag::err_anonymous_struct_not_member) | ||||||
5251 | << getLangOpts().CPlusPlus; | ||||||
5252 | Invalid = true; | ||||||
5253 | } | ||||||
5254 | |||||||
5255 | // C++ [dcl.dcl]p3: | ||||||
5256 | // [If there are no declarators], and except for the declaration of an | ||||||
5257 | // unnamed bit-field, the decl-specifier-seq shall introduce one or more | ||||||
5258 | // names into the program | ||||||
5259 | // C++ [class.mem]p2: | ||||||
5260 | // each such member-declaration shall either declare at least one member | ||||||
5261 | // name of the class or declare at least one unnamed bit-field | ||||||
5262 | // | ||||||
5263 | // For C this is an error even for a named struct, and is diagnosed elsewhere. | ||||||
5264 | if (getLangOpts().CPlusPlus && Record->field_empty()) | ||||||
5265 | Diag(DS.getBeginLoc(), diag::ext_no_declarators) << DS.getSourceRange(); | ||||||
5266 | |||||||
5267 | // Mock up a declarator. | ||||||
5268 | Declarator Dc(DS, DeclaratorContext::Member); | ||||||
5269 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); | ||||||
5270 | assert(TInfo && "couldn't build declarator info for anonymous struct/union")(static_cast <bool> (TInfo && "couldn't build declarator info for anonymous struct/union" ) ? void (0) : __assert_fail ("TInfo && \"couldn't build declarator info for anonymous struct/union\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5270, __extension__ __PRETTY_FUNCTION__)); | ||||||
5271 | |||||||
5272 | // Create a declaration for this anonymous struct/union. | ||||||
5273 | NamedDecl *Anon = nullptr; | ||||||
5274 | if (RecordDecl *OwningClass = dyn_cast<RecordDecl>(Owner)) { | ||||||
5275 | Anon = FieldDecl::Create( | ||||||
5276 | Context, OwningClass, DS.getBeginLoc(), Record->getLocation(), | ||||||
5277 | /*IdentifierInfo=*/nullptr, Context.getTypeDeclType(Record), TInfo, | ||||||
5278 | /*BitWidth=*/nullptr, /*Mutable=*/false, | ||||||
5279 | /*InitStyle=*/ICIS_NoInit); | ||||||
5280 | Anon->setAccess(AS); | ||||||
5281 | ProcessDeclAttributes(S, Anon, Dc); | ||||||
5282 | |||||||
5283 | if (getLangOpts().CPlusPlus) | ||||||
5284 | FieldCollector->Add(cast<FieldDecl>(Anon)); | ||||||
5285 | } else { | ||||||
5286 | DeclSpec::SCS SCSpec = DS.getStorageClassSpec(); | ||||||
5287 | StorageClass SC = StorageClassSpecToVarDeclStorageClass(DS); | ||||||
5288 | if (SCSpec == DeclSpec::SCS_mutable) { | ||||||
5289 | // mutable can only appear on non-static class members, so it's always | ||||||
5290 | // an error here | ||||||
5291 | Diag(Record->getLocation(), diag::err_mutable_nonmember); | ||||||
5292 | Invalid = true; | ||||||
5293 | SC = SC_None; | ||||||
5294 | } | ||||||
5295 | |||||||
5296 | assert(DS.getAttributes().empty() && "No attribute expected")(static_cast <bool> (DS.getAttributes().empty() && "No attribute expected") ? void (0) : __assert_fail ("DS.getAttributes().empty() && \"No attribute expected\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5296, __extension__ __PRETTY_FUNCTION__)); | ||||||
5297 | Anon = VarDecl::Create(Context, Owner, DS.getBeginLoc(), | ||||||
5298 | Record->getLocation(), /*IdentifierInfo=*/nullptr, | ||||||
5299 | Context.getTypeDeclType(Record), TInfo, SC); | ||||||
5300 | |||||||
5301 | // Default-initialize the implicit variable. This initialization will be | ||||||
5302 | // trivial in almost all cases, except if a union member has an in-class | ||||||
5303 | // initializer: | ||||||
5304 | // union { int n = 0; }; | ||||||
5305 | ActOnUninitializedDecl(Anon); | ||||||
5306 | } | ||||||
5307 | Anon->setImplicit(); | ||||||
5308 | |||||||
5309 | // Mark this as an anonymous struct/union type. | ||||||
5310 | Record->setAnonymousStructOrUnion(true); | ||||||
5311 | |||||||
5312 | // Add the anonymous struct/union object to the current | ||||||
5313 | // context. We'll be referencing this object when we refer to one of | ||||||
5314 | // its members. | ||||||
5315 | Owner->addDecl(Anon); | ||||||
5316 | |||||||
5317 | // Inject the members of the anonymous struct/union into the owning | ||||||
5318 | // context and into the identifier resolver chain for name lookup | ||||||
5319 | // purposes. | ||||||
5320 | SmallVector<NamedDecl*, 2> Chain; | ||||||
5321 | Chain.push_back(Anon); | ||||||
5322 | |||||||
5323 | if (InjectAnonymousStructOrUnionMembers(*this, S, Owner, Record, AS, Chain)) | ||||||
5324 | Invalid = true; | ||||||
5325 | |||||||
5326 | if (VarDecl *NewVD = dyn_cast<VarDecl>(Anon)) { | ||||||
5327 | if (getLangOpts().CPlusPlus && NewVD->isStaticLocal()) { | ||||||
5328 | MangleNumberingContext *MCtx; | ||||||
5329 | Decl *ManglingContextDecl; | ||||||
5330 | std::tie(MCtx, ManglingContextDecl) = | ||||||
5331 | getCurrentMangleNumberContext(NewVD->getDeclContext()); | ||||||
5332 | if (MCtx) { | ||||||
5333 | Context.setManglingNumber( | ||||||
5334 | NewVD, MCtx->getManglingNumber( | ||||||
5335 | NewVD, getMSManglingNumber(getLangOpts(), S))); | ||||||
5336 | Context.setStaticLocalNumber(NewVD, MCtx->getStaticLocalNumber(NewVD)); | ||||||
5337 | } | ||||||
5338 | } | ||||||
5339 | } | ||||||
5340 | |||||||
5341 | if (Invalid) | ||||||
5342 | Anon->setInvalidDecl(); | ||||||
5343 | |||||||
5344 | return Anon; | ||||||
5345 | } | ||||||
5346 | |||||||
5347 | /// BuildMicrosoftCAnonymousStruct - Handle the declaration of an | ||||||
5348 | /// Microsoft C anonymous structure. | ||||||
5349 | /// Ref: http://msdn.microsoft.com/en-us/library/z2cx9y4f.aspx | ||||||
5350 | /// Example: | ||||||
5351 | /// | ||||||
5352 | /// struct A { int a; }; | ||||||
5353 | /// struct B { struct A; int b; }; | ||||||
5354 | /// | ||||||
5355 | /// void foo() { | ||||||
5356 | /// B var; | ||||||
5357 | /// var.a = 3; | ||||||
5358 | /// } | ||||||
5359 | /// | ||||||
5360 | Decl *Sema::BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, | ||||||
5361 | RecordDecl *Record) { | ||||||
5362 | assert(Record && "expected a record!")(static_cast <bool> (Record && "expected a record!" ) ? void (0) : __assert_fail ("Record && \"expected a record!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5362, __extension__ __PRETTY_FUNCTION__)); | ||||||
5363 | |||||||
5364 | // Mock up a declarator. | ||||||
5365 | Declarator Dc(DS, DeclaratorContext::TypeName); | ||||||
5366 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); | ||||||
5367 | assert(TInfo && "couldn't build declarator info for anonymous struct")(static_cast <bool> (TInfo && "couldn't build declarator info for anonymous struct" ) ? void (0) : __assert_fail ("TInfo && \"couldn't build declarator info for anonymous struct\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5367, __extension__ __PRETTY_FUNCTION__)); | ||||||
5368 | |||||||
5369 | auto *ParentDecl = cast<RecordDecl>(CurContext); | ||||||
5370 | QualType RecTy = Context.getTypeDeclType(Record); | ||||||
5371 | |||||||
5372 | // Create a declaration for this anonymous struct. | ||||||
5373 | NamedDecl *Anon = | ||||||
5374 | FieldDecl::Create(Context, ParentDecl, DS.getBeginLoc(), DS.getBeginLoc(), | ||||||
5375 | /*IdentifierInfo=*/nullptr, RecTy, TInfo, | ||||||
5376 | /*BitWidth=*/nullptr, /*Mutable=*/false, | ||||||
5377 | /*InitStyle=*/ICIS_NoInit); | ||||||
5378 | Anon->setImplicit(); | ||||||
5379 | |||||||
5380 | // Add the anonymous struct object to the current context. | ||||||
5381 | CurContext->addDecl(Anon); | ||||||
5382 | |||||||
5383 | // Inject the members of the anonymous struct into the current | ||||||
5384 | // context and into the identifier resolver chain for name lookup | ||||||
5385 | // purposes. | ||||||
5386 | SmallVector<NamedDecl*, 2> Chain; | ||||||
5387 | Chain.push_back(Anon); | ||||||
5388 | |||||||
5389 | RecordDecl *RecordDef = Record->getDefinition(); | ||||||
5390 | if (RequireCompleteSizedType(Anon->getLocation(), RecTy, | ||||||
5391 | diag::err_field_incomplete_or_sizeless) || | ||||||
5392 | InjectAnonymousStructOrUnionMembers(*this, S, CurContext, RecordDef, | ||||||
5393 | AS_none, Chain)) { | ||||||
5394 | Anon->setInvalidDecl(); | ||||||
5395 | ParentDecl->setInvalidDecl(); | ||||||
5396 | } | ||||||
5397 | |||||||
5398 | return Anon; | ||||||
5399 | } | ||||||
5400 | |||||||
5401 | /// GetNameForDeclarator - Determine the full declaration name for the | ||||||
5402 | /// given Declarator. | ||||||
5403 | DeclarationNameInfo Sema::GetNameForDeclarator(Declarator &D) { | ||||||
5404 | return GetNameFromUnqualifiedId(D.getName()); | ||||||
5405 | } | ||||||
5406 | |||||||
5407 | /// Retrieves the declaration name from a parsed unqualified-id. | ||||||
5408 | DeclarationNameInfo | ||||||
5409 | Sema::GetNameFromUnqualifiedId(const UnqualifiedId &Name) { | ||||||
5410 | DeclarationNameInfo NameInfo; | ||||||
5411 | NameInfo.setLoc(Name.StartLocation); | ||||||
5412 | |||||||
5413 | switch (Name.getKind()) { | ||||||
5414 | |||||||
5415 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||
5416 | case UnqualifiedIdKind::IK_Identifier: | ||||||
5417 | NameInfo.setName(Name.Identifier); | ||||||
5418 | return NameInfo; | ||||||
5419 | |||||||
5420 | case UnqualifiedIdKind::IK_DeductionGuideName: { | ||||||
5421 | // C++ [temp.deduct.guide]p3: | ||||||
5422 | // The simple-template-id shall name a class template specialization. | ||||||
5423 | // The template-name shall be the same identifier as the template-name | ||||||
5424 | // of the simple-template-id. | ||||||
5425 | // These together intend to imply that the template-name shall name a | ||||||
5426 | // class template. | ||||||
5427 | // FIXME: template<typename T> struct X {}; | ||||||
5428 | // template<typename T> using Y = X<T>; | ||||||
5429 | // Y(int) -> Y<int>; | ||||||
5430 | // satisfies these rules but does not name a class template. | ||||||
5431 | TemplateName TN = Name.TemplateName.get().get(); | ||||||
5432 | auto *Template = TN.getAsTemplateDecl(); | ||||||
5433 | if (!Template || !isa<ClassTemplateDecl>(Template)) { | ||||||
5434 | Diag(Name.StartLocation, | ||||||
5435 | diag::err_deduction_guide_name_not_class_template) | ||||||
5436 | << (int)getTemplateNameKindForDiagnostics(TN) << TN; | ||||||
5437 | if (Template) | ||||||
5438 | Diag(Template->getLocation(), diag::note_template_decl_here); | ||||||
5439 | return DeclarationNameInfo(); | ||||||
5440 | } | ||||||
5441 | |||||||
5442 | NameInfo.setName( | ||||||
5443 | Context.DeclarationNames.getCXXDeductionGuideName(Template)); | ||||||
5444 | return NameInfo; | ||||||
5445 | } | ||||||
5446 | |||||||
5447 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||
5448 | NameInfo.setName(Context.DeclarationNames.getCXXOperatorName( | ||||||
5449 | Name.OperatorFunctionId.Operator)); | ||||||
5450 | NameInfo.setCXXOperatorNameRange(SourceRange( | ||||||
5451 | Name.OperatorFunctionId.SymbolLocations[0], Name.EndLocation)); | ||||||
5452 | return NameInfo; | ||||||
5453 | |||||||
5454 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||
5455 | NameInfo.setName(Context.DeclarationNames.getCXXLiteralOperatorName( | ||||||
5456 | Name.Identifier)); | ||||||
5457 | NameInfo.setCXXLiteralOperatorNameLoc(Name.EndLocation); | ||||||
5458 | return NameInfo; | ||||||
5459 | |||||||
5460 | case UnqualifiedIdKind::IK_ConversionFunctionId: { | ||||||
5461 | TypeSourceInfo *TInfo; | ||||||
5462 | QualType Ty = GetTypeFromParser(Name.ConversionFunctionId, &TInfo); | ||||||
5463 | if (Ty.isNull()) | ||||||
5464 | return DeclarationNameInfo(); | ||||||
5465 | NameInfo.setName(Context.DeclarationNames.getCXXConversionFunctionName( | ||||||
5466 | Context.getCanonicalType(Ty))); | ||||||
5467 | NameInfo.setNamedTypeInfo(TInfo); | ||||||
5468 | return NameInfo; | ||||||
5469 | } | ||||||
5470 | |||||||
5471 | case UnqualifiedIdKind::IK_ConstructorName: { | ||||||
5472 | TypeSourceInfo *TInfo; | ||||||
5473 | QualType Ty = GetTypeFromParser(Name.ConstructorName, &TInfo); | ||||||
5474 | if (Ty.isNull()) | ||||||
5475 | return DeclarationNameInfo(); | ||||||
5476 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||
5477 | Context.getCanonicalType(Ty))); | ||||||
5478 | NameInfo.setNamedTypeInfo(TInfo); | ||||||
5479 | return NameInfo; | ||||||
5480 | } | ||||||
5481 | |||||||
5482 | case UnqualifiedIdKind::IK_ConstructorTemplateId: { | ||||||
5483 | // In well-formed code, we can only have a constructor | ||||||
5484 | // template-id that refers to the current context, so go there | ||||||
5485 | // to find the actual type being constructed. | ||||||
5486 | CXXRecordDecl *CurClass = dyn_cast<CXXRecordDecl>(CurContext); | ||||||
5487 | if (!CurClass || CurClass->getIdentifier() != Name.TemplateId->Name) | ||||||
5488 | return DeclarationNameInfo(); | ||||||
5489 | |||||||
5490 | // Determine the type of the class being constructed. | ||||||
5491 | QualType CurClassType = Context.getTypeDeclType(CurClass); | ||||||
5492 | |||||||
5493 | // FIXME: Check two things: that the template-id names the same type as | ||||||
5494 | // CurClassType, and that the template-id does not occur when the name | ||||||
5495 | // was qualified. | ||||||
5496 | |||||||
5497 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||
5498 | Context.getCanonicalType(CurClassType))); | ||||||
5499 | // FIXME: should we retrieve TypeSourceInfo? | ||||||
5500 | NameInfo.setNamedTypeInfo(nullptr); | ||||||
5501 | return NameInfo; | ||||||
5502 | } | ||||||
5503 | |||||||
5504 | case UnqualifiedIdKind::IK_DestructorName: { | ||||||
5505 | TypeSourceInfo *TInfo; | ||||||
5506 | QualType Ty = GetTypeFromParser(Name.DestructorName, &TInfo); | ||||||
5507 | if (Ty.isNull()) | ||||||
5508 | return DeclarationNameInfo(); | ||||||
5509 | NameInfo.setName(Context.DeclarationNames.getCXXDestructorName( | ||||||
5510 | Context.getCanonicalType(Ty))); | ||||||
5511 | NameInfo.setNamedTypeInfo(TInfo); | ||||||
5512 | return NameInfo; | ||||||
5513 | } | ||||||
5514 | |||||||
5515 | case UnqualifiedIdKind::IK_TemplateId: { | ||||||
5516 | TemplateName TName = Name.TemplateId->Template.get(); | ||||||
5517 | SourceLocation TNameLoc = Name.TemplateId->TemplateNameLoc; | ||||||
5518 | return Context.getNameForTemplate(TName, TNameLoc); | ||||||
5519 | } | ||||||
5520 | |||||||
5521 | } // switch (Name.getKind()) | ||||||
5522 | |||||||
5523 | llvm_unreachable("Unknown name kind")::llvm::llvm_unreachable_internal("Unknown name kind", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 5523); | ||||||
5524 | } | ||||||
5525 | |||||||
5526 | static QualType getCoreType(QualType Ty) { | ||||||
5527 | do { | ||||||
5528 | if (Ty->isPointerType() || Ty->isReferenceType()) | ||||||
5529 | Ty = Ty->getPointeeType(); | ||||||
5530 | else if (Ty->isArrayType()) | ||||||
5531 | Ty = Ty->castAsArrayTypeUnsafe()->getElementType(); | ||||||
5532 | else | ||||||
5533 | return Ty.withoutLocalFastQualifiers(); | ||||||
5534 | } while (true); | ||||||
5535 | } | ||||||
5536 | |||||||
5537 | /// hasSimilarParameters - Determine whether the C++ functions Declaration | ||||||
5538 | /// and Definition have "nearly" matching parameters. This heuristic is | ||||||
5539 | /// used to improve diagnostics in the case where an out-of-line function | ||||||
5540 | /// definition doesn't match any declaration within the class or namespace. | ||||||
5541 | /// Also sets Params to the list of indices to the parameters that differ | ||||||
5542 | /// between the declaration and the definition. If hasSimilarParameters | ||||||
5543 | /// returns true and Params is empty, then all of the parameters match. | ||||||
5544 | static bool hasSimilarParameters(ASTContext &Context, | ||||||
5545 | FunctionDecl *Declaration, | ||||||
5546 | FunctionDecl *Definition, | ||||||
5547 | SmallVectorImpl<unsigned> &Params) { | ||||||
5548 | Params.clear(); | ||||||
5549 | if (Declaration->param_size() != Definition->param_size()) | ||||||
5550 | return false; | ||||||
5551 | for (unsigned Idx = 0; Idx < Declaration->param_size(); ++Idx) { | ||||||
5552 | QualType DeclParamTy = Declaration->getParamDecl(Idx)->getType(); | ||||||
5553 | QualType DefParamTy = Definition->getParamDecl(Idx)->getType(); | ||||||
5554 | |||||||
5555 | // The parameter types are identical | ||||||
5556 | if (Context.hasSameUnqualifiedType(DefParamTy, DeclParamTy)) | ||||||
5557 | continue; | ||||||
5558 | |||||||
5559 | QualType DeclParamBaseTy = getCoreType(DeclParamTy); | ||||||
5560 | QualType DefParamBaseTy = getCoreType(DefParamTy); | ||||||
5561 | const IdentifierInfo *DeclTyName = DeclParamBaseTy.getBaseTypeIdentifier(); | ||||||
5562 | const IdentifierInfo *DefTyName = DefParamBaseTy.getBaseTypeIdentifier(); | ||||||
5563 | |||||||
5564 | if (Context.hasSameUnqualifiedType(DeclParamBaseTy, DefParamBaseTy) || | ||||||
5565 | (DeclTyName && DeclTyName == DefTyName)) | ||||||
5566 | Params.push_back(Idx); | ||||||
5567 | else // The two parameters aren't even close | ||||||
5568 | return false; | ||||||
5569 | } | ||||||
5570 | |||||||
5571 | return true; | ||||||
5572 | } | ||||||
5573 | |||||||
5574 | /// NeedsRebuildingInCurrentInstantiation - Checks whether the given | ||||||
5575 | /// declarator needs to be rebuilt in the current instantiation. | ||||||
5576 | /// Any bits of declarator which appear before the name are valid for | ||||||
5577 | /// consideration here. That's specifically the type in the decl spec | ||||||
5578 | /// and the base type in any member-pointer chunks. | ||||||
5579 | static bool RebuildDeclaratorInCurrentInstantiation(Sema &S, Declarator &D, | ||||||
5580 | DeclarationName Name) { | ||||||
5581 | // The types we specifically need to rebuild are: | ||||||
5582 | // - typenames, typeofs, and decltypes | ||||||
5583 | // - types which will become injected class names | ||||||
5584 | // Of course, we also need to rebuild any type referencing such a | ||||||
5585 | // type. It's safest to just say "dependent", but we call out a | ||||||
5586 | // few cases here. | ||||||
5587 | |||||||
5588 | DeclSpec &DS = D.getMutableDeclSpec(); | ||||||
5589 | switch (DS.getTypeSpecType()) { | ||||||
5590 | case DeclSpec::TST_typename: | ||||||
5591 | case DeclSpec::TST_typeofType: | ||||||
5592 | case DeclSpec::TST_underlyingType: | ||||||
5593 | case DeclSpec::TST_atomic: { | ||||||
5594 | // Grab the type from the parser. | ||||||
5595 | TypeSourceInfo *TSI = nullptr; | ||||||
5596 | QualType T = S.GetTypeFromParser(DS.getRepAsType(), &TSI); | ||||||
5597 | if (T.isNull() || !T->isInstantiationDependentType()) break; | ||||||
5598 | |||||||
5599 | // Make sure there's a type source info. This isn't really much | ||||||
5600 | // of a waste; most dependent types should have type source info | ||||||
5601 | // attached already. | ||||||
5602 | if (!TSI) | ||||||
5603 | TSI = S.Context.getTrivialTypeSourceInfo(T, DS.getTypeSpecTypeLoc()); | ||||||
5604 | |||||||
5605 | // Rebuild the type in the current instantiation. | ||||||
5606 | TSI = S.RebuildTypeInCurrentInstantiation(TSI, D.getIdentifierLoc(), Name); | ||||||
5607 | if (!TSI) return true; | ||||||
5608 | |||||||
5609 | // Store the new type back in the decl spec. | ||||||
5610 | ParsedType LocType = S.CreateParsedType(TSI->getType(), TSI); | ||||||
5611 | DS.UpdateTypeRep(LocType); | ||||||
5612 | break; | ||||||
5613 | } | ||||||
5614 | |||||||
5615 | case DeclSpec::TST_decltype: | ||||||
5616 | case DeclSpec::TST_typeofExpr: { | ||||||
5617 | Expr *E = DS.getRepAsExpr(); | ||||||
5618 | ExprResult Result = S.RebuildExprInCurrentInstantiation(E); | ||||||
5619 | if (Result.isInvalid()) return true; | ||||||
5620 | DS.UpdateExprRep(Result.get()); | ||||||
5621 | break; | ||||||
5622 | } | ||||||
5623 | |||||||
5624 | default: | ||||||
5625 | // Nothing to do for these decl specs. | ||||||
5626 | break; | ||||||
5627 | } | ||||||
5628 | |||||||
5629 | // It doesn't matter what order we do this in. | ||||||
5630 | for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) { | ||||||
5631 | DeclaratorChunk &Chunk = D.getTypeObject(I); | ||||||
5632 | |||||||
5633 | // The only type information in the declarator which can come | ||||||
5634 | // before the declaration name is the base type of a member | ||||||
5635 | // pointer. | ||||||
5636 | if (Chunk.Kind != DeclaratorChunk::MemberPointer) | ||||||
5637 | continue; | ||||||
5638 | |||||||
5639 | // Rebuild the scope specifier in-place. | ||||||
5640 | CXXScopeSpec &SS = Chunk.Mem.Scope(); | ||||||
5641 | if (S.RebuildNestedNameSpecifierInCurrentInstantiation(SS)) | ||||||
5642 | return true; | ||||||
5643 | } | ||||||
5644 | |||||||
5645 | return false; | ||||||
5646 | } | ||||||
5647 | |||||||
5648 | void Sema::warnOnReservedIdentifier(const NamedDecl *D) { | ||||||
5649 | // Avoid warning twice on the same identifier, and don't warn on redeclaration | ||||||
5650 | // of system decl. | ||||||
5651 | if (D->getPreviousDecl() || D->isImplicit()) | ||||||
5652 | return; | ||||||
5653 | ReservedIdentifierStatus Status = D->isReserved(getLangOpts()); | ||||||
5654 | if (Status != ReservedIdentifierStatus::NotReserved && | ||||||
5655 | !Context.getSourceManager().isInSystemHeader(D->getLocation())) | ||||||
5656 | Diag(D->getLocation(), diag::warn_reserved_extern_symbol) | ||||||
5657 | << D << static_cast<int>(Status); | ||||||
5658 | } | ||||||
5659 | |||||||
5660 | Decl *Sema::ActOnDeclarator(Scope *S, Declarator &D) { | ||||||
5661 | D.setFunctionDefinitionKind(FunctionDefinitionKind::Declaration); | ||||||
5662 | Decl *Dcl = HandleDeclarator(S, D, MultiTemplateParamsArg()); | ||||||
5663 | |||||||
5664 | if (OriginalLexicalContext && OriginalLexicalContext->isObjCContainer() && | ||||||
5665 | Dcl && Dcl->getDeclContext()->isFileContext()) | ||||||
5666 | Dcl->setTopLevelDeclInObjCContainer(); | ||||||
5667 | |||||||
5668 | return Dcl; | ||||||
5669 | } | ||||||
5670 | |||||||
5671 | /// DiagnoseClassNameShadow - Implement C++ [class.mem]p13: | ||||||
5672 | /// If T is the name of a class, then each of the following shall have a | ||||||
5673 | /// name different from T: | ||||||
5674 | /// - every static data member of class T; | ||||||
5675 | /// - every member function of class T | ||||||
5676 | /// - every member of class T that is itself a type; | ||||||
5677 | /// \returns true if the declaration name violates these rules. | ||||||
5678 | bool Sema::DiagnoseClassNameShadow(DeclContext *DC, | ||||||
5679 | DeclarationNameInfo NameInfo) { | ||||||
5680 | DeclarationName Name = NameInfo.getName(); | ||||||
5681 | |||||||
5682 | CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(DC); | ||||||
5683 | while (Record && Record->isAnonymousStructOrUnion()) | ||||||
5684 | Record = dyn_cast<CXXRecordDecl>(Record->getParent()); | ||||||
5685 | if (Record && Record->getIdentifier() && Record->getDeclName() == Name) { | ||||||
5686 | Diag(NameInfo.getLoc(), diag::err_member_name_of_class) << Name; | ||||||
5687 | return true; | ||||||
5688 | } | ||||||
5689 | |||||||
5690 | return false; | ||||||
5691 | } | ||||||
5692 | |||||||
5693 | /// Diagnose a declaration whose declarator-id has the given | ||||||
5694 | /// nested-name-specifier. | ||||||
5695 | /// | ||||||
5696 | /// \param SS The nested-name-specifier of the declarator-id. | ||||||
5697 | /// | ||||||
5698 | /// \param DC The declaration context to which the nested-name-specifier | ||||||
5699 | /// resolves. | ||||||
5700 | /// | ||||||
5701 | /// \param Name The name of the entity being declared. | ||||||
5702 | /// | ||||||
5703 | /// \param Loc The location of the name of the entity being declared. | ||||||
5704 | /// | ||||||
5705 | /// \param IsTemplateId Whether the name is a (simple-)template-id, and thus | ||||||
5706 | /// we're declaring an explicit / partial specialization / instantiation. | ||||||
5707 | /// | ||||||
5708 | /// \returns true if we cannot safely recover from this error, false otherwise. | ||||||
5709 | bool Sema::diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC, | ||||||
5710 | DeclarationName Name, | ||||||
5711 | SourceLocation Loc, bool IsTemplateId) { | ||||||
5712 | DeclContext *Cur = CurContext; | ||||||
5713 | while (isa<LinkageSpecDecl>(Cur) || isa<CapturedDecl>(Cur)) | ||||||
5714 | Cur = Cur->getParent(); | ||||||
5715 | |||||||
5716 | // If the user provided a superfluous scope specifier that refers back to the | ||||||
5717 | // class in which the entity is already declared, diagnose and ignore it. | ||||||
5718 | // | ||||||
5719 | // class X { | ||||||
5720 | // void X::f(); | ||||||
5721 | // }; | ||||||
5722 | // | ||||||
5723 | // Note, it was once ill-formed to give redundant qualification in all | ||||||
5724 | // contexts, but that rule was removed by DR482. | ||||||
5725 | if (Cur->Equals(DC)) { | ||||||
5726 | if (Cur->isRecord()) { | ||||||
5727 | Diag(Loc, LangOpts.MicrosoftExt ? diag::warn_member_extra_qualification | ||||||
5728 | : diag::err_member_extra_qualification) | ||||||
5729 | << Name << FixItHint::CreateRemoval(SS.getRange()); | ||||||
5730 | SS.clear(); | ||||||
5731 | } else { | ||||||
5732 | Diag(Loc, diag::warn_namespace_member_extra_qualification) << Name; | ||||||
5733 | } | ||||||
5734 | return false; | ||||||
5735 | } | ||||||
5736 | |||||||
5737 | // Check whether the qualifying scope encloses the scope of the original | ||||||
5738 | // declaration. For a template-id, we perform the checks in | ||||||
5739 | // CheckTemplateSpecializationScope. | ||||||
5740 | if (!Cur->Encloses(DC) && !IsTemplateId) { | ||||||
5741 | if (Cur->isRecord()) | ||||||
5742 | Diag(Loc, diag::err_member_qualification) | ||||||
5743 | << Name << SS.getRange(); | ||||||
5744 | else if (isa<TranslationUnitDecl>(DC)) | ||||||
5745 | Diag(Loc, diag::err_invalid_declarator_global_scope) | ||||||
5746 | << Name << SS.getRange(); | ||||||
5747 | else if (isa<FunctionDecl>(Cur)) | ||||||
5748 | Diag(Loc, diag::err_invalid_declarator_in_function) | ||||||
5749 | << Name << SS.getRange(); | ||||||
5750 | else if (isa<BlockDecl>(Cur)) | ||||||
5751 | Diag(Loc, diag::err_invalid_declarator_in_block) | ||||||
5752 | << Name << SS.getRange(); | ||||||
5753 | else | ||||||
5754 | Diag(Loc, diag::err_invalid_declarator_scope) | ||||||
5755 | << Name << cast<NamedDecl>(Cur) << cast<NamedDecl>(DC) << SS.getRange(); | ||||||
5756 | |||||||
5757 | return true; | ||||||
5758 | } | ||||||
5759 | |||||||
5760 | if (Cur->isRecord()) { | ||||||
5761 | // Cannot qualify members within a class. | ||||||
5762 | Diag(Loc, diag::err_member_qualification) | ||||||
5763 | << Name << SS.getRange(); | ||||||
5764 | SS.clear(); | ||||||
5765 | |||||||
5766 | // C++ constructors and destructors with incorrect scopes can break | ||||||
5767 | // our AST invariants by having the wrong underlying types. If | ||||||
5768 | // that's the case, then drop this declaration entirely. | ||||||
5769 | if ((Name.getNameKind() == DeclarationName::CXXConstructorName || | ||||||
5770 | Name.getNameKind() == DeclarationName::CXXDestructorName) && | ||||||
5771 | !Context.hasSameType(Name.getCXXNameType(), | ||||||
5772 | Context.getTypeDeclType(cast<CXXRecordDecl>(Cur)))) | ||||||
5773 | return true; | ||||||
5774 | |||||||
5775 | return false; | ||||||
5776 | } | ||||||
5777 | |||||||
5778 | // C++11 [dcl.meaning]p1: | ||||||
5779 | // [...] "The nested-name-specifier of the qualified declarator-id shall | ||||||
5780 | // not begin with a decltype-specifer" | ||||||
5781 | NestedNameSpecifierLoc SpecLoc(SS.getScopeRep(), SS.location_data()); | ||||||
5782 | while (SpecLoc.getPrefix()) | ||||||
5783 | SpecLoc = SpecLoc.getPrefix(); | ||||||
5784 | if (dyn_cast_or_null<DecltypeType>( | ||||||
5785 | SpecLoc.getNestedNameSpecifier()->getAsType())) | ||||||
5786 | Diag(Loc, diag::err_decltype_in_declarator) | ||||||
5787 | << SpecLoc.getTypeLoc().getSourceRange(); | ||||||
5788 | |||||||
5789 | return false; | ||||||
5790 | } | ||||||
5791 | |||||||
5792 | NamedDecl *Sema::HandleDeclarator(Scope *S, Declarator &D, | ||||||
5793 | MultiTemplateParamsArg TemplateParamLists) { | ||||||
5794 | // TODO: consider using NameInfo for diagnostic. | ||||||
5795 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||
5796 | DeclarationName Name = NameInfo.getName(); | ||||||
5797 | |||||||
5798 | // All of these full declarators require an identifier. If it doesn't have | ||||||
5799 | // one, the ParsedFreeStandingDeclSpec action should be used. | ||||||
5800 | if (D.isDecompositionDeclarator()) { | ||||||
5801 | return ActOnDecompositionDeclarator(S, D, TemplateParamLists); | ||||||
5802 | } else if (!Name) { | ||||||
5803 | if (!D.isInvalidType()) // Reject this if we think it is valid. | ||||||
5804 | Diag(D.getDeclSpec().getBeginLoc(), diag::err_declarator_need_ident) | ||||||
5805 | << D.getDeclSpec().getSourceRange() << D.getSourceRange(); | ||||||
5806 | return nullptr; | ||||||
5807 | } else if (DiagnoseUnexpandedParameterPack(NameInfo, UPPC_DeclarationType)) | ||||||
5808 | return nullptr; | ||||||
5809 | |||||||
5810 | // The scope passed in may not be a decl scope. Zip up the scope tree until | ||||||
5811 | // we find one that is. | ||||||
5812 | while ((S->getFlags() & Scope::DeclScope) == 0 || | ||||||
5813 | (S->getFlags() & Scope::TemplateParamScope) != 0) | ||||||
5814 | S = S->getParent(); | ||||||
5815 | |||||||
5816 | DeclContext *DC = CurContext; | ||||||
5817 | if (D.getCXXScopeSpec().isInvalid()) | ||||||
5818 | D.setInvalidType(); | ||||||
5819 | else if (D.getCXXScopeSpec().isSet()) { | ||||||
5820 | if (DiagnoseUnexpandedParameterPack(D.getCXXScopeSpec(), | ||||||
5821 | UPPC_DeclarationQualifier)) | ||||||
5822 | return nullptr; | ||||||
5823 | |||||||
5824 | bool EnteringContext = !D.getDeclSpec().isFriendSpecified(); | ||||||
5825 | DC = computeDeclContext(D.getCXXScopeSpec(), EnteringContext); | ||||||
5826 | if (!DC || isa<EnumDecl>(DC)) { | ||||||
5827 | // If we could not compute the declaration context, it's because the | ||||||
5828 | // declaration context is dependent but does not refer to a class, | ||||||
5829 | // class template, or class template partial specialization. Complain | ||||||
5830 | // and return early, to avoid the coming semantic disaster. | ||||||
5831 | Diag(D.getIdentifierLoc(), | ||||||
5832 | diag::err_template_qualified_declarator_no_match) | ||||||
5833 | << D.getCXXScopeSpec().getScopeRep() | ||||||
5834 | << D.getCXXScopeSpec().getRange(); | ||||||
5835 | return nullptr; | ||||||
5836 | } | ||||||
5837 | bool IsDependentContext = DC->isDependentContext(); | ||||||
5838 | |||||||
5839 | if (!IsDependentContext && | ||||||
5840 | RequireCompleteDeclContext(D.getCXXScopeSpec(), DC)) | ||||||
5841 | return nullptr; | ||||||
5842 | |||||||
5843 | // If a class is incomplete, do not parse entities inside it. | ||||||
5844 | if (isa<CXXRecordDecl>(DC) && !cast<CXXRecordDecl>(DC)->hasDefinition()) { | ||||||
5845 | Diag(D.getIdentifierLoc(), | ||||||
5846 | diag::err_member_def_undefined_record) | ||||||
5847 | << Name << DC << D.getCXXScopeSpec().getRange(); | ||||||
5848 | return nullptr; | ||||||
5849 | } | ||||||
5850 | if (!D.getDeclSpec().isFriendSpecified()) { | ||||||
5851 | if (diagnoseQualifiedDeclaration( | ||||||
5852 | D.getCXXScopeSpec(), DC, Name, D.getIdentifierLoc(), | ||||||
5853 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId)) { | ||||||
5854 | if (DC->isRecord()) | ||||||
5855 | return nullptr; | ||||||
5856 | |||||||
5857 | D.setInvalidType(); | ||||||
5858 | } | ||||||
5859 | } | ||||||
5860 | |||||||
5861 | // Check whether we need to rebuild the type of the given | ||||||
5862 | // declaration in the current instantiation. | ||||||
5863 | if (EnteringContext && IsDependentContext && | ||||||
5864 | TemplateParamLists.size() != 0) { | ||||||
5865 | ContextRAII SavedContext(*this, DC); | ||||||
5866 | if (RebuildDeclaratorInCurrentInstantiation(*this, D, Name)) | ||||||
5867 | D.setInvalidType(); | ||||||
5868 | } | ||||||
5869 | } | ||||||
5870 | |||||||
5871 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
5872 | QualType R = TInfo->getType(); | ||||||
5873 | |||||||
5874 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||
5875 | UPPC_DeclarationType)) | ||||||
5876 | D.setInvalidType(); | ||||||
5877 | |||||||
5878 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||
5879 | forRedeclarationInCurContext()); | ||||||
5880 | |||||||
5881 | // See if this is a redefinition of a variable in the same scope. | ||||||
5882 | if (!D.getCXXScopeSpec().isSet()) { | ||||||
5883 | bool IsLinkageLookup = false; | ||||||
5884 | bool CreateBuiltins = false; | ||||||
5885 | |||||||
5886 | // If the declaration we're planning to build will be a function | ||||||
5887 | // or object with linkage, then look for another declaration with | ||||||
5888 | // linkage (C99 6.2.2p4-5 and C++ [basic.link]p6). | ||||||
5889 | // | ||||||
5890 | // If the declaration we're planning to build will be declared with | ||||||
5891 | // external linkage in the translation unit, create any builtin with | ||||||
5892 | // the same name. | ||||||
5893 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||||
5894 | /* Do nothing*/; | ||||||
5895 | else if (CurContext->isFunctionOrMethod() && | ||||||
5896 | (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern || | ||||||
5897 | R->isFunctionType())) { | ||||||
5898 | IsLinkageLookup = true; | ||||||
5899 | CreateBuiltins = | ||||||
5900 | CurContext->getEnclosingNamespaceContext()->isTranslationUnit(); | ||||||
5901 | } else if (CurContext->getRedeclContext()->isTranslationUnit() && | ||||||
5902 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) | ||||||
5903 | CreateBuiltins = true; | ||||||
5904 | |||||||
5905 | if (IsLinkageLookup) { | ||||||
5906 | Previous.clear(LookupRedeclarationWithLinkage); | ||||||
5907 | Previous.setRedeclarationKind(ForExternalRedeclaration); | ||||||
5908 | } | ||||||
5909 | |||||||
5910 | LookupName(Previous, S, CreateBuiltins); | ||||||
5911 | } else { // Something like "int foo::x;" | ||||||
5912 | LookupQualifiedName(Previous, DC); | ||||||
5913 | |||||||
5914 | // C++ [dcl.meaning]p1: | ||||||
5915 | // When the declarator-id is qualified, the declaration shall refer to a | ||||||
5916 | // previously declared member of the class or namespace to which the | ||||||
5917 | // qualifier refers (or, in the case of a namespace, of an element of the | ||||||
5918 | // inline namespace set of that namespace (7.3.1)) or to a specialization | ||||||
5919 | // thereof; [...] | ||||||
5920 | // | ||||||
5921 | // Note that we already checked the context above, and that we do not have | ||||||
5922 | // enough information to make sure that Previous contains the declaration | ||||||
5923 | // we want to match. For example, given: | ||||||
5924 | // | ||||||
5925 | // class X { | ||||||
5926 | // void f(); | ||||||
5927 | // void f(float); | ||||||
5928 | // }; | ||||||
5929 | // | ||||||
5930 | // void X::f(int) { } // ill-formed | ||||||
5931 | // | ||||||
5932 | // In this case, Previous will point to the overload set | ||||||
5933 | // containing the two f's declared in X, but neither of them | ||||||
5934 | // matches. | ||||||
5935 | |||||||
5936 | // C++ [dcl.meaning]p1: | ||||||
5937 | // [...] the member shall not merely have been introduced by a | ||||||
5938 | // using-declaration in the scope of the class or namespace nominated by | ||||||
5939 | // the nested-name-specifier of the declarator-id. | ||||||
5940 | RemoveUsingDecls(Previous); | ||||||
5941 | } | ||||||
5942 | |||||||
5943 | if (Previous.isSingleResult() && | ||||||
5944 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||
5945 | // Maybe we will complain about the shadowed template parameter. | ||||||
5946 | if (!D.isInvalidType()) | ||||||
5947 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), | ||||||
5948 | Previous.getFoundDecl()); | ||||||
5949 | |||||||
5950 | // Just pretend that we didn't see the previous declaration. | ||||||
5951 | Previous.clear(); | ||||||
5952 | } | ||||||
5953 | |||||||
5954 | if (!R->isFunctionType() && DiagnoseClassNameShadow(DC, NameInfo)) | ||||||
5955 | // Forget that the previous declaration is the injected-class-name. | ||||||
5956 | Previous.clear(); | ||||||
5957 | |||||||
5958 | // In C++, the previous declaration we find might be a tag type | ||||||
5959 | // (class or enum). In this case, the new declaration will hide the | ||||||
5960 | // tag type. Note that this applies to functions, function templates, and | ||||||
5961 | // variables, but not to typedefs (C++ [dcl.typedef]p4) or variable templates. | ||||||
5962 | if (Previous.isSingleTagDecl() && | ||||||
5963 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && | ||||||
5964 | (TemplateParamLists.size() == 0 || R->isFunctionType())) | ||||||
5965 | Previous.clear(); | ||||||
5966 | |||||||
5967 | // Check that there are no default arguments other than in the parameters | ||||||
5968 | // of a function declaration (C++ only). | ||||||
5969 | if (getLangOpts().CPlusPlus) | ||||||
5970 | CheckExtraCXXDefaultArguments(D); | ||||||
5971 | |||||||
5972 | NamedDecl *New; | ||||||
5973 | |||||||
5974 | bool AddToScope = true; | ||||||
5975 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { | ||||||
5976 | if (TemplateParamLists.size()) { | ||||||
5977 | Diag(D.getIdentifierLoc(), diag::err_template_typedef); | ||||||
5978 | return nullptr; | ||||||
5979 | } | ||||||
5980 | |||||||
5981 | New = ActOnTypedefDeclarator(S, D, DC, TInfo, Previous); | ||||||
5982 | } else if (R->isFunctionType()) { | ||||||
5983 | New = ActOnFunctionDeclarator(S, D, DC, TInfo, Previous, | ||||||
5984 | TemplateParamLists, | ||||||
5985 | AddToScope); | ||||||
5986 | } else { | ||||||
5987 | New = ActOnVariableDeclarator(S, D, DC, TInfo, Previous, TemplateParamLists, | ||||||
5988 | AddToScope); | ||||||
5989 | } | ||||||
5990 | |||||||
5991 | if (!New) | ||||||
5992 | return nullptr; | ||||||
5993 | |||||||
5994 | // If this has an identifier and is not a function template specialization, | ||||||
5995 | // add it to the scope stack. | ||||||
5996 | if (New->getDeclName() && AddToScope) | ||||||
5997 | PushOnScopeChains(New, S); | ||||||
5998 | |||||||
5999 | if (isInOpenMPDeclareTargetContext()) | ||||||
6000 | checkDeclIsAllowedInOpenMPTarget(nullptr, New); | ||||||
6001 | |||||||
6002 | return New; | ||||||
6003 | } | ||||||
6004 | |||||||
6005 | /// Helper method to turn variable array types into constant array | ||||||
6006 | /// types in certain situations which would otherwise be errors (for | ||||||
6007 | /// GCC compatibility). | ||||||
6008 | static QualType TryToFixInvalidVariablyModifiedType(QualType T, | ||||||
6009 | ASTContext &Context, | ||||||
6010 | bool &SizeIsNegative, | ||||||
6011 | llvm::APSInt &Oversized) { | ||||||
6012 | // This method tries to turn a variable array into a constant | ||||||
6013 | // array even when the size isn't an ICE. This is necessary | ||||||
6014 | // for compatibility with code that depends on gcc's buggy | ||||||
6015 | // constant expression folding, like struct {char x[(int)(char*)2];} | ||||||
6016 | SizeIsNegative = false; | ||||||
6017 | Oversized = 0; | ||||||
6018 | |||||||
6019 | if (T->isDependentType()) | ||||||
6020 | return QualType(); | ||||||
6021 | |||||||
6022 | QualifierCollector Qs; | ||||||
6023 | const Type *Ty = Qs.strip(T); | ||||||
6024 | |||||||
6025 | if (const PointerType* PTy = dyn_cast<PointerType>(Ty)) { | ||||||
6026 | QualType Pointee = PTy->getPointeeType(); | ||||||
6027 | QualType FixedType = | ||||||
6028 | TryToFixInvalidVariablyModifiedType(Pointee, Context, SizeIsNegative, | ||||||
6029 | Oversized); | ||||||
6030 | if (FixedType.isNull()) return FixedType; | ||||||
6031 | FixedType = Context.getPointerType(FixedType); | ||||||
6032 | return Qs.apply(Context, FixedType); | ||||||
6033 | } | ||||||
6034 | if (const ParenType* PTy = dyn_cast<ParenType>(Ty)) { | ||||||
6035 | QualType Inner = PTy->getInnerType(); | ||||||
6036 | QualType FixedType = | ||||||
6037 | TryToFixInvalidVariablyModifiedType(Inner, Context, SizeIsNegative, | ||||||
6038 | Oversized); | ||||||
6039 | if (FixedType.isNull()) return FixedType; | ||||||
6040 | FixedType = Context.getParenType(FixedType); | ||||||
6041 | return Qs.apply(Context, FixedType); | ||||||
6042 | } | ||||||
6043 | |||||||
6044 | const VariableArrayType* VLATy = dyn_cast<VariableArrayType>(T); | ||||||
6045 | if (!VLATy) | ||||||
6046 | return QualType(); | ||||||
6047 | |||||||
6048 | QualType ElemTy = VLATy->getElementType(); | ||||||
6049 | if (ElemTy->isVariablyModifiedType()) { | ||||||
6050 | ElemTy = TryToFixInvalidVariablyModifiedType(ElemTy, Context, | ||||||
6051 | SizeIsNegative, Oversized); | ||||||
6052 | if (ElemTy.isNull()) | ||||||
6053 | return QualType(); | ||||||
6054 | } | ||||||
6055 | |||||||
6056 | Expr::EvalResult Result; | ||||||
6057 | if (!VLATy->getSizeExpr() || | ||||||
6058 | !VLATy->getSizeExpr()->EvaluateAsInt(Result, Context)) | ||||||
6059 | return QualType(); | ||||||
6060 | |||||||
6061 | llvm::APSInt Res = Result.Val.getInt(); | ||||||
6062 | |||||||
6063 | // Check whether the array size is negative. | ||||||
6064 | if (Res.isSigned() && Res.isNegative()) { | ||||||
6065 | SizeIsNegative = true; | ||||||
6066 | return QualType(); | ||||||
6067 | } | ||||||
6068 | |||||||
6069 | // Check whether the array is too large to be addressed. | ||||||
6070 | unsigned ActiveSizeBits = | ||||||
6071 | (!ElemTy->isDependentType() && !ElemTy->isVariablyModifiedType() && | ||||||
6072 | !ElemTy->isIncompleteType() && !ElemTy->isUndeducedType()) | ||||||
6073 | ? ConstantArrayType::getNumAddressingBits(Context, ElemTy, Res) | ||||||
6074 | : Res.getActiveBits(); | ||||||
6075 | if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) { | ||||||
6076 | Oversized = Res; | ||||||
6077 | return QualType(); | ||||||
6078 | } | ||||||
6079 | |||||||
6080 | QualType FoldedArrayType = Context.getConstantArrayType( | ||||||
6081 | ElemTy, Res, VLATy->getSizeExpr(), ArrayType::Normal, 0); | ||||||
6082 | return Qs.apply(Context, FoldedArrayType); | ||||||
6083 | } | ||||||
6084 | |||||||
6085 | static void | ||||||
6086 | FixInvalidVariablyModifiedTypeLoc(TypeLoc SrcTL, TypeLoc DstTL) { | ||||||
6087 | SrcTL = SrcTL.getUnqualifiedLoc(); | ||||||
6088 | DstTL = DstTL.getUnqualifiedLoc(); | ||||||
6089 | if (PointerTypeLoc SrcPTL = SrcTL.getAs<PointerTypeLoc>()) { | ||||||
6090 | PointerTypeLoc DstPTL = DstTL.castAs<PointerTypeLoc>(); | ||||||
6091 | FixInvalidVariablyModifiedTypeLoc(SrcPTL.getPointeeLoc(), | ||||||
6092 | DstPTL.getPointeeLoc()); | ||||||
6093 | DstPTL.setStarLoc(SrcPTL.getStarLoc()); | ||||||
6094 | return; | ||||||
6095 | } | ||||||
6096 | if (ParenTypeLoc SrcPTL = SrcTL.getAs<ParenTypeLoc>()) { | ||||||
6097 | ParenTypeLoc DstPTL = DstTL.castAs<ParenTypeLoc>(); | ||||||
6098 | FixInvalidVariablyModifiedTypeLoc(SrcPTL.getInnerLoc(), | ||||||
6099 | DstPTL.getInnerLoc()); | ||||||
6100 | DstPTL.setLParenLoc(SrcPTL.getLParenLoc()); | ||||||
6101 | DstPTL.setRParenLoc(SrcPTL.getRParenLoc()); | ||||||
6102 | return; | ||||||
6103 | } | ||||||
6104 | ArrayTypeLoc SrcATL = SrcTL.castAs<ArrayTypeLoc>(); | ||||||
6105 | ArrayTypeLoc DstATL = DstTL.castAs<ArrayTypeLoc>(); | ||||||
6106 | TypeLoc SrcElemTL = SrcATL.getElementLoc(); | ||||||
6107 | TypeLoc DstElemTL = DstATL.getElementLoc(); | ||||||
6108 | if (VariableArrayTypeLoc SrcElemATL = | ||||||
6109 | SrcElemTL.getAs<VariableArrayTypeLoc>()) { | ||||||
6110 | ConstantArrayTypeLoc DstElemATL = DstElemTL.castAs<ConstantArrayTypeLoc>(); | ||||||
6111 | FixInvalidVariablyModifiedTypeLoc(SrcElemATL, DstElemATL); | ||||||
6112 | } else { | ||||||
6113 | DstElemTL.initializeFullCopy(SrcElemTL); | ||||||
6114 | } | ||||||
6115 | DstATL.setLBracketLoc(SrcATL.getLBracketLoc()); | ||||||
6116 | DstATL.setSizeExpr(SrcATL.getSizeExpr()); | ||||||
6117 | DstATL.setRBracketLoc(SrcATL.getRBracketLoc()); | ||||||
6118 | } | ||||||
6119 | |||||||
6120 | /// Helper method to turn variable array types into constant array | ||||||
6121 | /// types in certain situations which would otherwise be errors (for | ||||||
6122 | /// GCC compatibility). | ||||||
6123 | static TypeSourceInfo* | ||||||
6124 | TryToFixInvalidVariablyModifiedTypeSourceInfo(TypeSourceInfo *TInfo, | ||||||
6125 | ASTContext &Context, | ||||||
6126 | bool &SizeIsNegative, | ||||||
6127 | llvm::APSInt &Oversized) { | ||||||
6128 | QualType FixedTy | ||||||
6129 | = TryToFixInvalidVariablyModifiedType(TInfo->getType(), Context, | ||||||
6130 | SizeIsNegative, Oversized); | ||||||
6131 | if (FixedTy.isNull()) | ||||||
6132 | return nullptr; | ||||||
6133 | TypeSourceInfo *FixedTInfo = Context.getTrivialTypeSourceInfo(FixedTy); | ||||||
6134 | FixInvalidVariablyModifiedTypeLoc(TInfo->getTypeLoc(), | ||||||
6135 | FixedTInfo->getTypeLoc()); | ||||||
6136 | return FixedTInfo; | ||||||
6137 | } | ||||||
6138 | |||||||
6139 | /// Attempt to fold a variable-sized type to a constant-sized type, returning | ||||||
6140 | /// true if we were successful. | ||||||
6141 | bool Sema::tryToFixVariablyModifiedVarType(TypeSourceInfo *&TInfo, | ||||||
6142 | QualType &T, SourceLocation Loc, | ||||||
6143 | unsigned FailedFoldDiagID) { | ||||||
6144 | bool SizeIsNegative; | ||||||
6145 | llvm::APSInt Oversized; | ||||||
6146 | TypeSourceInfo *FixedTInfo = TryToFixInvalidVariablyModifiedTypeSourceInfo( | ||||||
6147 | TInfo, Context, SizeIsNegative, Oversized); | ||||||
6148 | if (FixedTInfo) { | ||||||
6149 | Diag(Loc, diag::ext_vla_folded_to_constant); | ||||||
6150 | TInfo = FixedTInfo; | ||||||
6151 | T = FixedTInfo->getType(); | ||||||
6152 | return true; | ||||||
6153 | } | ||||||
6154 | |||||||
6155 | if (SizeIsNegative) | ||||||
6156 | Diag(Loc, diag::err_typecheck_negative_array_size); | ||||||
6157 | else if (Oversized.getBoolValue()) | ||||||
6158 | Diag(Loc, diag::err_array_too_large) << toString(Oversized, 10); | ||||||
6159 | else if (FailedFoldDiagID) | ||||||
6160 | Diag(Loc, FailedFoldDiagID); | ||||||
6161 | return false; | ||||||
6162 | } | ||||||
6163 | |||||||
6164 | /// Register the given locally-scoped extern "C" declaration so | ||||||
6165 | /// that it can be found later for redeclarations. We include any extern "C" | ||||||
6166 | /// declaration that is not visible in the translation unit here, not just | ||||||
6167 | /// function-scope declarations. | ||||||
6168 | void | ||||||
6169 | Sema::RegisterLocallyScopedExternCDecl(NamedDecl *ND, Scope *S) { | ||||||
6170 | if (!getLangOpts().CPlusPlus && | ||||||
6171 | ND->getLexicalDeclContext()->getRedeclContext()->isTranslationUnit()) | ||||||
6172 | // Don't need to track declarations in the TU in C. | ||||||
6173 | return; | ||||||
6174 | |||||||
6175 | // Note that we have a locally-scoped external with this name. | ||||||
6176 | Context.getExternCContextDecl()->makeDeclVisibleInContext(ND); | ||||||
6177 | } | ||||||
6178 | |||||||
6179 | NamedDecl *Sema::findLocallyScopedExternCDecl(DeclarationName Name) { | ||||||
6180 | // FIXME: We can have multiple results via __attribute__((overloadable)). | ||||||
6181 | auto Result = Context.getExternCContextDecl()->lookup(Name); | ||||||
6182 | return Result.empty() ? nullptr : *Result.begin(); | ||||||
6183 | } | ||||||
6184 | |||||||
6185 | /// Diagnose function specifiers on a declaration of an identifier that | ||||||
6186 | /// does not identify a function. | ||||||
6187 | void Sema::DiagnoseFunctionSpecifiers(const DeclSpec &DS) { | ||||||
6188 | // FIXME: We should probably indicate the identifier in question to avoid | ||||||
6189 | // confusion for constructs like "virtual int a(), b;" | ||||||
6190 | if (DS.isVirtualSpecified()) | ||||||
6191 | Diag(DS.getVirtualSpecLoc(), | ||||||
6192 | diag::err_virtual_non_function); | ||||||
6193 | |||||||
6194 | if (DS.hasExplicitSpecifier()) | ||||||
6195 | Diag(DS.getExplicitSpecLoc(), | ||||||
6196 | diag::err_explicit_non_function); | ||||||
6197 | |||||||
6198 | if (DS.isNoreturnSpecified()) | ||||||
6199 | Diag(DS.getNoreturnSpecLoc(), | ||||||
6200 | diag::err_noreturn_non_function); | ||||||
6201 | } | ||||||
6202 | |||||||
6203 | NamedDecl* | ||||||
6204 | Sema::ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, | ||||||
6205 | TypeSourceInfo *TInfo, LookupResult &Previous) { | ||||||
6206 | // Typedef declarators cannot be qualified (C++ [dcl.meaning]p1). | ||||||
6207 | if (D.getCXXScopeSpec().isSet()) { | ||||||
6208 | Diag(D.getIdentifierLoc(), diag::err_qualified_typedef_declarator) | ||||||
6209 | << D.getCXXScopeSpec().getRange(); | ||||||
6210 | D.setInvalidType(); | ||||||
6211 | // Pretend we didn't see the scope specifier. | ||||||
6212 | DC = CurContext; | ||||||
6213 | Previous.clear(); | ||||||
6214 | } | ||||||
6215 | |||||||
6216 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
6217 | |||||||
6218 | if (D.getDeclSpec().isInlineSpecified()) | ||||||
6219 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
6220 | << getLangOpts().CPlusPlus17; | ||||||
6221 | if (D.getDeclSpec().hasConstexprSpecifier()) | ||||||
6222 | Diag(D.getDeclSpec().getConstexprSpecLoc(), diag::err_invalid_constexpr) | ||||||
6223 | << 1 << static_cast<int>(D.getDeclSpec().getConstexprSpecifier()); | ||||||
6224 | |||||||
6225 | if (D.getName().Kind != UnqualifiedIdKind::IK_Identifier) { | ||||||
6226 | if (D.getName().Kind == UnqualifiedIdKind::IK_DeductionGuideName) | ||||||
6227 | Diag(D.getName().StartLocation, | ||||||
6228 | diag::err_deduction_guide_invalid_specifier) | ||||||
6229 | << "typedef"; | ||||||
6230 | else | ||||||
6231 | Diag(D.getName().StartLocation, diag::err_typedef_not_identifier) | ||||||
6232 | << D.getName().getSourceRange(); | ||||||
6233 | return nullptr; | ||||||
6234 | } | ||||||
6235 | |||||||
6236 | TypedefDecl *NewTD = ParseTypedefDecl(S, D, TInfo->getType(), TInfo); | ||||||
6237 | if (!NewTD) return nullptr; | ||||||
6238 | |||||||
6239 | // Handle attributes prior to checking for duplicates in MergeVarDecl | ||||||
6240 | ProcessDeclAttributes(S, NewTD, D); | ||||||
6241 | |||||||
6242 | CheckTypedefForVariablyModifiedType(S, NewTD); | ||||||
6243 | |||||||
6244 | bool Redeclaration = D.isRedeclaration(); | ||||||
6245 | NamedDecl *ND = ActOnTypedefNameDecl(S, DC, NewTD, Previous, Redeclaration); | ||||||
6246 | D.setRedeclaration(Redeclaration); | ||||||
6247 | return ND; | ||||||
6248 | } | ||||||
6249 | |||||||
6250 | void | ||||||
6251 | Sema::CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *NewTD) { | ||||||
6252 | // C99 6.7.7p2: If a typedef name specifies a variably modified type | ||||||
6253 | // then it shall have block scope. | ||||||
6254 | // Note that variably modified types must be fixed before merging the decl so | ||||||
6255 | // that redeclarations will match. | ||||||
6256 | TypeSourceInfo *TInfo = NewTD->getTypeSourceInfo(); | ||||||
6257 | QualType T = TInfo->getType(); | ||||||
6258 | if (T->isVariablyModifiedType()) { | ||||||
6259 | setFunctionHasBranchProtectedScope(); | ||||||
6260 | |||||||
6261 | if (S->getFnParent() == nullptr) { | ||||||
6262 | bool SizeIsNegative; | ||||||
6263 | llvm::APSInt Oversized; | ||||||
6264 | TypeSourceInfo *FixedTInfo = | ||||||
6265 | TryToFixInvalidVariablyModifiedTypeSourceInfo(TInfo, Context, | ||||||
6266 | SizeIsNegative, | ||||||
6267 | Oversized); | ||||||
6268 | if (FixedTInfo) { | ||||||
6269 | Diag(NewTD->getLocation(), diag::ext_vla_folded_to_constant); | ||||||
6270 | NewTD->setTypeSourceInfo(FixedTInfo); | ||||||
6271 | } else { | ||||||
6272 | if (SizeIsNegative) | ||||||
6273 | Diag(NewTD->getLocation(), diag::err_typecheck_negative_array_size); | ||||||
6274 | else if (T->isVariableArrayType()) | ||||||
6275 | Diag(NewTD->getLocation(), diag::err_vla_decl_in_file_scope); | ||||||
6276 | else if (Oversized.getBoolValue()) | ||||||
6277 | Diag(NewTD->getLocation(), diag::err_array_too_large) | ||||||
6278 | << toString(Oversized, 10); | ||||||
6279 | else | ||||||
6280 | Diag(NewTD->getLocation(), diag::err_vm_decl_in_file_scope); | ||||||
6281 | NewTD->setInvalidDecl(); | ||||||
6282 | } | ||||||
6283 | } | ||||||
6284 | } | ||||||
6285 | } | ||||||
6286 | |||||||
6287 | /// ActOnTypedefNameDecl - Perform semantic checking for a declaration which | ||||||
6288 | /// declares a typedef-name, either using the 'typedef' type specifier or via | ||||||
6289 | /// a C++0x [dcl.typedef]p2 alias-declaration: 'using T = A;'. | ||||||
6290 | NamedDecl* | ||||||
6291 | Sema::ActOnTypedefNameDecl(Scope *S, DeclContext *DC, TypedefNameDecl *NewTD, | ||||||
6292 | LookupResult &Previous, bool &Redeclaration) { | ||||||
6293 | |||||||
6294 | // Find the shadowed declaration before filtering for scope. | ||||||
6295 | NamedDecl *ShadowedDecl = getShadowedDeclaration(NewTD, Previous); | ||||||
6296 | |||||||
6297 | // Merge the decl with the existing one if appropriate. If the decl is | ||||||
6298 | // in an outer scope, it isn't the same thing. | ||||||
6299 | FilterLookupForScope(Previous, DC, S, /*ConsiderLinkage*/false, | ||||||
6300 | /*AllowInlineNamespace*/false); | ||||||
6301 | filterNonConflictingPreviousTypedefDecls(*this, NewTD, Previous); | ||||||
6302 | if (!Previous.empty()) { | ||||||
6303 | Redeclaration = true; | ||||||
6304 | MergeTypedefNameDecl(S, NewTD, Previous); | ||||||
6305 | } else { | ||||||
6306 | inferGslPointerAttribute(NewTD); | ||||||
6307 | } | ||||||
6308 | |||||||
6309 | if (ShadowedDecl && !Redeclaration) | ||||||
6310 | CheckShadow(NewTD, ShadowedDecl, Previous); | ||||||
6311 | |||||||
6312 | // If this is the C FILE type, notify the AST context. | ||||||
6313 | if (IdentifierInfo *II = NewTD->getIdentifier()) | ||||||
6314 | if (!NewTD->isInvalidDecl() && | ||||||
6315 | NewTD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { | ||||||
6316 | if (II->isStr("FILE")) | ||||||
6317 | Context.setFILEDecl(NewTD); | ||||||
6318 | else if (II->isStr("jmp_buf")) | ||||||
6319 | Context.setjmp_bufDecl(NewTD); | ||||||
6320 | else if (II->isStr("sigjmp_buf")) | ||||||
6321 | Context.setsigjmp_bufDecl(NewTD); | ||||||
6322 | else if (II->isStr("ucontext_t")) | ||||||
6323 | Context.setucontext_tDecl(NewTD); | ||||||
6324 | } | ||||||
6325 | |||||||
6326 | return NewTD; | ||||||
6327 | } | ||||||
6328 | |||||||
6329 | /// Determines whether the given declaration is an out-of-scope | ||||||
6330 | /// previous declaration. | ||||||
6331 | /// | ||||||
6332 | /// This routine should be invoked when name lookup has found a | ||||||
6333 | /// previous declaration (PrevDecl) that is not in the scope where a | ||||||
6334 | /// new declaration by the same name is being introduced. If the new | ||||||
6335 | /// declaration occurs in a local scope, previous declarations with | ||||||
6336 | /// linkage may still be considered previous declarations (C99 | ||||||
6337 | /// 6.2.2p4-5, C++ [basic.link]p6). | ||||||
6338 | /// | ||||||
6339 | /// \param PrevDecl the previous declaration found by name | ||||||
6340 | /// lookup | ||||||
6341 | /// | ||||||
6342 | /// \param DC the context in which the new declaration is being | ||||||
6343 | /// declared. | ||||||
6344 | /// | ||||||
6345 | /// \returns true if PrevDecl is an out-of-scope previous declaration | ||||||
6346 | /// for a new delcaration with the same name. | ||||||
6347 | static bool | ||||||
6348 | isOutOfScopePreviousDeclaration(NamedDecl *PrevDecl, DeclContext *DC, | ||||||
6349 | ASTContext &Context) { | ||||||
6350 | if (!PrevDecl) | ||||||
6351 | return false; | ||||||
6352 | |||||||
6353 | if (!PrevDecl->hasLinkage()) | ||||||
6354 | return false; | ||||||
6355 | |||||||
6356 | if (Context.getLangOpts().CPlusPlus) { | ||||||
6357 | // C++ [basic.link]p6: | ||||||
6358 | // If there is a visible declaration of an entity with linkage | ||||||
6359 | // having the same name and type, ignoring entities declared | ||||||
6360 | // outside the innermost enclosing namespace scope, the block | ||||||
6361 | // scope declaration declares that same entity and receives the | ||||||
6362 | // linkage of the previous declaration. | ||||||
6363 | DeclContext *OuterContext = DC->getRedeclContext(); | ||||||
6364 | if (!OuterContext->isFunctionOrMethod()) | ||||||
6365 | // This rule only applies to block-scope declarations. | ||||||
6366 | return false; | ||||||
6367 | |||||||
6368 | DeclContext *PrevOuterContext = PrevDecl->getDeclContext(); | ||||||
6369 | if (PrevOuterContext->isRecord()) | ||||||
6370 | // We found a member function: ignore it. | ||||||
6371 | return false; | ||||||
6372 | |||||||
6373 | // Find the innermost enclosing namespace for the new and | ||||||
6374 | // previous declarations. | ||||||
6375 | OuterContext = OuterContext->getEnclosingNamespaceContext(); | ||||||
6376 | PrevOuterContext = PrevOuterContext->getEnclosingNamespaceContext(); | ||||||
6377 | |||||||
6378 | // The previous declaration is in a different namespace, so it | ||||||
6379 | // isn't the same function. | ||||||
6380 | if (!OuterContext->Equals(PrevOuterContext)) | ||||||
6381 | return false; | ||||||
6382 | } | ||||||
6383 | |||||||
6384 | return true; | ||||||
6385 | } | ||||||
6386 | |||||||
6387 | static void SetNestedNameSpecifier(Sema &S, DeclaratorDecl *DD, Declarator &D) { | ||||||
6388 | CXXScopeSpec &SS = D.getCXXScopeSpec(); | ||||||
6389 | if (!SS.isSet()) return; | ||||||
6390 | DD->setQualifierInfo(SS.getWithLocInContext(S.Context)); | ||||||
6391 | } | ||||||
6392 | |||||||
6393 | bool Sema::inferObjCARCLifetime(ValueDecl *decl) { | ||||||
6394 | QualType type = decl->getType(); | ||||||
6395 | Qualifiers::ObjCLifetime lifetime = type.getObjCLifetime(); | ||||||
6396 | if (lifetime == Qualifiers::OCL_Autoreleasing) { | ||||||
6397 | // Various kinds of declaration aren't allowed to be __autoreleasing. | ||||||
6398 | unsigned kind = -1U; | ||||||
6399 | if (VarDecl *var = dyn_cast<VarDecl>(decl)) { | ||||||
6400 | if (var->hasAttr<BlocksAttr>()) | ||||||
6401 | kind = 0; // __block | ||||||
6402 | else if (!var->hasLocalStorage()) | ||||||
6403 | kind = 1; // global | ||||||
6404 | } else if (isa<ObjCIvarDecl>(decl)) { | ||||||
6405 | kind = 3; // ivar | ||||||
6406 | } else if (isa<FieldDecl>(decl)) { | ||||||
6407 | kind = 2; // field | ||||||
6408 | } | ||||||
6409 | |||||||
6410 | if (kind != -1U) { | ||||||
6411 | Diag(decl->getLocation(), diag::err_arc_autoreleasing_var) | ||||||
6412 | << kind; | ||||||
6413 | } | ||||||
6414 | } else if (lifetime == Qualifiers::OCL_None) { | ||||||
6415 | // Try to infer lifetime. | ||||||
6416 | if (!type->isObjCLifetimeType()) | ||||||
6417 | return false; | ||||||
6418 | |||||||
6419 | lifetime = type->getObjCARCImplicitLifetime(); | ||||||
6420 | type = Context.getLifetimeQualifiedType(type, lifetime); | ||||||
6421 | decl->setType(type); | ||||||
6422 | } | ||||||
6423 | |||||||
6424 | if (VarDecl *var = dyn_cast<VarDecl>(decl)) { | ||||||
6425 | // Thread-local variables cannot have lifetime. | ||||||
6426 | if (lifetime && lifetime != Qualifiers::OCL_ExplicitNone && | ||||||
6427 | var->getTLSKind()) { | ||||||
6428 | Diag(var->getLocation(), diag::err_arc_thread_ownership) | ||||||
6429 | << var->getType(); | ||||||
6430 | return true; | ||||||
6431 | } | ||||||
6432 | } | ||||||
6433 | |||||||
6434 | return false; | ||||||
6435 | } | ||||||
6436 | |||||||
6437 | void Sema::deduceOpenCLAddressSpace(ValueDecl *Decl) { | ||||||
6438 | if (Decl->getType().hasAddressSpace()) | ||||||
6439 | return; | ||||||
6440 | if (Decl->getType()->isDependentType()) | ||||||
6441 | return; | ||||||
6442 | if (VarDecl *Var = dyn_cast<VarDecl>(Decl)) { | ||||||
6443 | QualType Type = Var->getType(); | ||||||
6444 | if (Type->isSamplerT() || Type->isVoidType()) | ||||||
6445 | return; | ||||||
6446 | LangAS ImplAS = LangAS::opencl_private; | ||||||
6447 | // OpenCL C v3.0 s6.7.8 - For OpenCL C 2.0 or with the | ||||||
6448 | // __opencl_c_program_scope_global_variables feature, the address space | ||||||
6449 | // for a variable at program scope or a static or extern variable inside | ||||||
6450 | // a function are inferred to be __global. | ||||||
6451 | if (getOpenCLOptions().areProgramScopeVariablesSupported(getLangOpts()) && | ||||||
6452 | Var->hasGlobalStorage()) | ||||||
6453 | ImplAS = LangAS::opencl_global; | ||||||
6454 | // If the original type from a decayed type is an array type and that array | ||||||
6455 | // type has no address space yet, deduce it now. | ||||||
6456 | if (auto DT = dyn_cast<DecayedType>(Type)) { | ||||||
6457 | auto OrigTy = DT->getOriginalType(); | ||||||
6458 | if (!OrigTy.hasAddressSpace() && OrigTy->isArrayType()) { | ||||||
6459 | // Add the address space to the original array type and then propagate | ||||||
6460 | // that to the element type through `getAsArrayType`. | ||||||
6461 | OrigTy = Context.getAddrSpaceQualType(OrigTy, ImplAS); | ||||||
6462 | OrigTy = QualType(Context.getAsArrayType(OrigTy), 0); | ||||||
6463 | // Re-generate the decayed type. | ||||||
6464 | Type = Context.getDecayedType(OrigTy); | ||||||
6465 | } | ||||||
6466 | } | ||||||
6467 | Type = Context.getAddrSpaceQualType(Type, ImplAS); | ||||||
6468 | // Apply any qualifiers (including address space) from the array type to | ||||||
6469 | // the element type. This implements C99 6.7.3p8: "If the specification of | ||||||
6470 | // an array type includes any type qualifiers, the element type is so | ||||||
6471 | // qualified, not the array type." | ||||||
6472 | if (Type->isArrayType()) | ||||||
6473 | Type = QualType(Context.getAsArrayType(Type), 0); | ||||||
6474 | Decl->setType(Type); | ||||||
6475 | } | ||||||
6476 | } | ||||||
6477 | |||||||
6478 | static void checkAttributesAfterMerging(Sema &S, NamedDecl &ND) { | ||||||
6479 | // Ensure that an auto decl is deduced otherwise the checks below might cache | ||||||
6480 | // the wrong linkage. | ||||||
6481 | assert(S.ParsingInitForAutoVars.count(&ND) == 0)(static_cast <bool> (S.ParsingInitForAutoVars.count(& ND) == 0) ? void (0) : __assert_fail ("S.ParsingInitForAutoVars.count(&ND) == 0" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 6481, __extension__ __PRETTY_FUNCTION__)); | ||||||
6482 | |||||||
6483 | // 'weak' only applies to declarations with external linkage. | ||||||
6484 | if (WeakAttr *Attr = ND.getAttr<WeakAttr>()) { | ||||||
6485 | if (!ND.isExternallyVisible()) { | ||||||
6486 | S.Diag(Attr->getLocation(), diag::err_attribute_weak_static); | ||||||
6487 | ND.dropAttr<WeakAttr>(); | ||||||
6488 | } | ||||||
6489 | } | ||||||
6490 | if (WeakRefAttr *Attr = ND.getAttr<WeakRefAttr>()) { | ||||||
6491 | if (ND.isExternallyVisible()) { | ||||||
6492 | S.Diag(Attr->getLocation(), diag::err_attribute_weakref_not_static); | ||||||
6493 | ND.dropAttr<WeakRefAttr>(); | ||||||
6494 | ND.dropAttr<AliasAttr>(); | ||||||
6495 | } | ||||||
6496 | } | ||||||
6497 | |||||||
6498 | if (auto *VD = dyn_cast<VarDecl>(&ND)) { | ||||||
6499 | if (VD->hasInit()) { | ||||||
6500 | if (const auto *Attr = VD->getAttr<AliasAttr>()) { | ||||||
6501 | assert(VD->isThisDeclarationADefinition() &&(static_cast <bool> (VD->isThisDeclarationADefinition () && !VD->isExternallyVisible() && "Broken AliasAttr handled late!" ) ? void (0) : __assert_fail ("VD->isThisDeclarationADefinition() && !VD->isExternallyVisible() && \"Broken AliasAttr handled late!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 6502, __extension__ __PRETTY_FUNCTION__)) | ||||||
6502 | !VD->isExternallyVisible() && "Broken AliasAttr handled late!")(static_cast <bool> (VD->isThisDeclarationADefinition () && !VD->isExternallyVisible() && "Broken AliasAttr handled late!" ) ? void (0) : __assert_fail ("VD->isThisDeclarationADefinition() && !VD->isExternallyVisible() && \"Broken AliasAttr handled late!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 6502, __extension__ __PRETTY_FUNCTION__)); | ||||||
6503 | S.Diag(Attr->getLocation(), diag::err_alias_is_definition) << VD << 0; | ||||||
6504 | VD->dropAttr<AliasAttr>(); | ||||||
6505 | } | ||||||
6506 | } | ||||||
6507 | } | ||||||
6508 | |||||||
6509 | // 'selectany' only applies to externally visible variable declarations. | ||||||
6510 | // It does not apply to functions. | ||||||
6511 | if (SelectAnyAttr *Attr = ND.getAttr<SelectAnyAttr>()) { | ||||||
6512 | if (isa<FunctionDecl>(ND) || !ND.isExternallyVisible()) { | ||||||
6513 | S.Diag(Attr->getLocation(), | ||||||
6514 | diag::err_attribute_selectany_non_extern_data); | ||||||
6515 | ND.dropAttr<SelectAnyAttr>(); | ||||||
6516 | } | ||||||
6517 | } | ||||||
6518 | |||||||
6519 | if (const InheritableAttr *Attr = getDLLAttr(&ND)) { | ||||||
6520 | auto *VD = dyn_cast<VarDecl>(&ND); | ||||||
6521 | bool IsAnonymousNS = false; | ||||||
6522 | bool IsMicrosoft = S.Context.getTargetInfo().getCXXABI().isMicrosoft(); | ||||||
6523 | if (VD) { | ||||||
6524 | const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(VD->getDeclContext()); | ||||||
6525 | while (NS && !IsAnonymousNS) { | ||||||
6526 | IsAnonymousNS = NS->isAnonymousNamespace(); | ||||||
6527 | NS = dyn_cast<NamespaceDecl>(NS->getParent()); | ||||||
6528 | } | ||||||
6529 | } | ||||||
6530 | // dll attributes require external linkage. Static locals may have external | ||||||
6531 | // linkage but still cannot be explicitly imported or exported. | ||||||
6532 | // In Microsoft mode, a variable defined in anonymous namespace must have | ||||||
6533 | // external linkage in order to be exported. | ||||||
6534 | bool AnonNSInMicrosoftMode = IsAnonymousNS && IsMicrosoft; | ||||||
6535 | if ((ND.isExternallyVisible() && AnonNSInMicrosoftMode) || | ||||||
6536 | (!AnonNSInMicrosoftMode && | ||||||
6537 | (!ND.isExternallyVisible() || (VD && VD->isStaticLocal())))) { | ||||||
6538 | S.Diag(ND.getLocation(), diag::err_attribute_dll_not_extern) | ||||||
6539 | << &ND << Attr; | ||||||
6540 | ND.setInvalidDecl(); | ||||||
6541 | } | ||||||
6542 | } | ||||||
6543 | |||||||
6544 | // Check the attributes on the function type, if any. | ||||||
6545 | if (const auto *FD = dyn_cast<FunctionDecl>(&ND)) { | ||||||
6546 | // Don't declare this variable in the second operand of the for-statement; | ||||||
6547 | // GCC miscompiles that by ending its lifetime before evaluating the | ||||||
6548 | // third operand. See gcc.gnu.org/PR86769. | ||||||
6549 | AttributedTypeLoc ATL; | ||||||
6550 | for (TypeLoc TL = FD->getTypeSourceInfo()->getTypeLoc(); | ||||||
6551 | (ATL = TL.getAsAdjusted<AttributedTypeLoc>()); | ||||||
6552 | TL = ATL.getModifiedLoc()) { | ||||||
6553 | // The [[lifetimebound]] attribute can be applied to the implicit object | ||||||
6554 | // parameter of a non-static member function (other than a ctor or dtor) | ||||||
6555 | // by applying it to the function type. | ||||||
6556 | if (const auto *A = ATL.getAttrAs<LifetimeBoundAttr>()) { | ||||||
6557 | const auto *MD = dyn_cast<CXXMethodDecl>(FD); | ||||||
6558 | if (!MD || MD->isStatic()) { | ||||||
6559 | S.Diag(A->getLocation(), diag::err_lifetimebound_no_object_param) | ||||||
6560 | << !MD << A->getRange(); | ||||||
6561 | } else if (isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)) { | ||||||
6562 | S.Diag(A->getLocation(), diag::err_lifetimebound_ctor_dtor) | ||||||
6563 | << isa<CXXDestructorDecl>(MD) << A->getRange(); | ||||||
6564 | } | ||||||
6565 | } | ||||||
6566 | } | ||||||
6567 | } | ||||||
6568 | } | ||||||
6569 | |||||||
6570 | static void checkDLLAttributeRedeclaration(Sema &S, NamedDecl *OldDecl, | ||||||
6571 | NamedDecl *NewDecl, | ||||||
6572 | bool IsSpecialization, | ||||||
6573 | bool IsDefinition) { | ||||||
6574 | if (OldDecl->isInvalidDecl() || NewDecl->isInvalidDecl()) | ||||||
6575 | return; | ||||||
6576 | |||||||
6577 | bool IsTemplate = false; | ||||||
6578 | if (TemplateDecl *OldTD = dyn_cast<TemplateDecl>(OldDecl)) { | ||||||
6579 | OldDecl = OldTD->getTemplatedDecl(); | ||||||
6580 | IsTemplate = true; | ||||||
6581 | if (!IsSpecialization) | ||||||
6582 | IsDefinition = false; | ||||||
6583 | } | ||||||
6584 | if (TemplateDecl *NewTD = dyn_cast<TemplateDecl>(NewDecl)) { | ||||||
6585 | NewDecl = NewTD->getTemplatedDecl(); | ||||||
6586 | IsTemplate = true; | ||||||
6587 | } | ||||||
6588 | |||||||
6589 | if (!OldDecl || !NewDecl) | ||||||
6590 | return; | ||||||
6591 | |||||||
6592 | const DLLImportAttr *OldImportAttr = OldDecl->getAttr<DLLImportAttr>(); | ||||||
6593 | const DLLExportAttr *OldExportAttr = OldDecl->getAttr<DLLExportAttr>(); | ||||||
6594 | const DLLImportAttr *NewImportAttr = NewDecl->getAttr<DLLImportAttr>(); | ||||||
6595 | const DLLExportAttr *NewExportAttr = NewDecl->getAttr<DLLExportAttr>(); | ||||||
6596 | |||||||
6597 | // dllimport and dllexport are inheritable attributes so we have to exclude | ||||||
6598 | // inherited attribute instances. | ||||||
6599 | bool HasNewAttr = (NewImportAttr && !NewImportAttr->isInherited()) || | ||||||
6600 | (NewExportAttr && !NewExportAttr->isInherited()); | ||||||
6601 | |||||||
6602 | // A redeclaration is not allowed to add a dllimport or dllexport attribute, | ||||||
6603 | // the only exception being explicit specializations. | ||||||
6604 | // Implicitly generated declarations are also excluded for now because there | ||||||
6605 | // is no other way to switch these to use dllimport or dllexport. | ||||||
6606 | bool AddsAttr = !(OldImportAttr || OldExportAttr) && HasNewAttr; | ||||||
6607 | |||||||
6608 | if (AddsAttr && !IsSpecialization && !OldDecl->isImplicit()) { | ||||||
6609 | // Allow with a warning for free functions and global variables. | ||||||
6610 | bool JustWarn = false; | ||||||
6611 | if (!OldDecl->isCXXClassMember()) { | ||||||
6612 | auto *VD = dyn_cast<VarDecl>(OldDecl); | ||||||
6613 | if (VD && !VD->getDescribedVarTemplate()) | ||||||
6614 | JustWarn = true; | ||||||
6615 | auto *FD = dyn_cast<FunctionDecl>(OldDecl); | ||||||
6616 | if (FD && FD->getTemplatedKind() == FunctionDecl::TK_NonTemplate) | ||||||
6617 | JustWarn = true; | ||||||
6618 | } | ||||||
6619 | |||||||
6620 | // We cannot change a declaration that's been used because IR has already | ||||||
6621 | // been emitted. Dllimported functions will still work though (modulo | ||||||
6622 | // address equality) as they can use the thunk. | ||||||
6623 | if (OldDecl->isUsed()) | ||||||
6624 | if (!isa<FunctionDecl>(OldDecl) || !NewImportAttr) | ||||||
6625 | JustWarn = false; | ||||||
6626 | |||||||
6627 | unsigned DiagID = JustWarn ? diag::warn_attribute_dll_redeclaration | ||||||
6628 | : diag::err_attribute_dll_redeclaration; | ||||||
6629 | S.Diag(NewDecl->getLocation(), DiagID) | ||||||
6630 | << NewDecl | ||||||
6631 | << (NewImportAttr ? (const Attr *)NewImportAttr : NewExportAttr); | ||||||
6632 | S.Diag(OldDecl->getLocation(), diag::note_previous_declaration); | ||||||
6633 | if (!JustWarn) { | ||||||
6634 | NewDecl->setInvalidDecl(); | ||||||
6635 | return; | ||||||
6636 | } | ||||||
6637 | } | ||||||
6638 | |||||||
6639 | // A redeclaration is not allowed to drop a dllimport attribute, the only | ||||||
6640 | // exceptions being inline function definitions (except for function | ||||||
6641 | // templates), local extern declarations, qualified friend declarations or | ||||||
6642 | // special MSVC extension: in the last case, the declaration is treated as if | ||||||
6643 | // it were marked dllexport. | ||||||
6644 | bool IsInline = false, IsStaticDataMember = false, IsQualifiedFriend = false; | ||||||
6645 | bool IsMicrosoftABI = S.Context.getTargetInfo().shouldDLLImportComdatSymbols(); | ||||||
6646 | if (const auto *VD = dyn_cast<VarDecl>(NewDecl)) { | ||||||
6647 | // Ignore static data because out-of-line definitions are diagnosed | ||||||
6648 | // separately. | ||||||
6649 | IsStaticDataMember = VD->isStaticDataMember(); | ||||||
6650 | IsDefinition = VD->isThisDeclarationADefinition(S.Context) != | ||||||
6651 | VarDecl::DeclarationOnly; | ||||||
6652 | } else if (const auto *FD = dyn_cast<FunctionDecl>(NewDecl)) { | ||||||
6653 | IsInline = FD->isInlined(); | ||||||
6654 | IsQualifiedFriend = FD->getQualifier() && | ||||||
6655 | FD->getFriendObjectKind() == Decl::FOK_Declared; | ||||||
6656 | } | ||||||
6657 | |||||||
6658 | if (OldImportAttr && !HasNewAttr && | ||||||
6659 | (!IsInline || (IsMicrosoftABI && IsTemplate)) && !IsStaticDataMember && | ||||||
6660 | !NewDecl->isLocalExternDecl() && !IsQualifiedFriend) { | ||||||
6661 | if (IsMicrosoftABI && IsDefinition) { | ||||||
6662 | S.Diag(NewDecl->getLocation(), | ||||||
6663 | diag::warn_redeclaration_without_import_attribute) | ||||||
6664 | << NewDecl; | ||||||
6665 | S.Diag(OldDecl->getLocation(), diag::note_previous_declaration); | ||||||
6666 | NewDecl->dropAttr<DLLImportAttr>(); | ||||||
6667 | NewDecl->addAttr( | ||||||
6668 | DLLExportAttr::CreateImplicit(S.Context, NewImportAttr->getRange())); | ||||||
6669 | } else { | ||||||
6670 | S.Diag(NewDecl->getLocation(), | ||||||
6671 | diag::warn_redeclaration_without_attribute_prev_attribute_ignored) | ||||||
6672 | << NewDecl << OldImportAttr; | ||||||
6673 | S.Diag(OldDecl->getLocation(), diag::note_previous_declaration); | ||||||
6674 | S.Diag(OldImportAttr->getLocation(), diag::note_previous_attribute); | ||||||
6675 | OldDecl->dropAttr<DLLImportAttr>(); | ||||||
6676 | NewDecl->dropAttr<DLLImportAttr>(); | ||||||
6677 | } | ||||||
6678 | } else if (IsInline && OldImportAttr && !IsMicrosoftABI) { | ||||||
6679 | // In MinGW, seeing a function declared inline drops the dllimport | ||||||
6680 | // attribute. | ||||||
6681 | OldDecl->dropAttr<DLLImportAttr>(); | ||||||
6682 | NewDecl->dropAttr<DLLImportAttr>(); | ||||||
6683 | S.Diag(NewDecl->getLocation(), | ||||||
6684 | diag::warn_dllimport_dropped_from_inline_function) | ||||||
6685 | << NewDecl << OldImportAttr; | ||||||
6686 | } | ||||||
6687 | |||||||
6688 | // A specialization of a class template member function is processed here | ||||||
6689 | // since it's a redeclaration. If the parent class is dllexport, the | ||||||
6690 | // specialization inherits that attribute. This doesn't happen automatically | ||||||
6691 | // since the parent class isn't instantiated until later. | ||||||
6692 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewDecl)) { | ||||||
6693 | if (MD->getTemplatedKind() == FunctionDecl::TK_MemberSpecialization && | ||||||
6694 | !NewImportAttr && !NewExportAttr) { | ||||||
6695 | if (const DLLExportAttr *ParentExportAttr = | ||||||
6696 | MD->getParent()->getAttr<DLLExportAttr>()) { | ||||||
6697 | DLLExportAttr *NewAttr = ParentExportAttr->clone(S.Context); | ||||||
6698 | NewAttr->setInherited(true); | ||||||
6699 | NewDecl->addAttr(NewAttr); | ||||||
6700 | } | ||||||
6701 | } | ||||||
6702 | } | ||||||
6703 | } | ||||||
6704 | |||||||
6705 | /// Given that we are within the definition of the given function, | ||||||
6706 | /// will that definition behave like C99's 'inline', where the | ||||||
6707 | /// definition is discarded except for optimization purposes? | ||||||
6708 | static bool isFunctionDefinitionDiscarded(Sema &S, FunctionDecl *FD) { | ||||||
6709 | // Try to avoid calling GetGVALinkageForFunction. | ||||||
6710 | |||||||
6711 | // All cases of this require the 'inline' keyword. | ||||||
6712 | if (!FD->isInlined()) return false; | ||||||
6713 | |||||||
6714 | // This is only possible in C++ with the gnu_inline attribute. | ||||||
6715 | if (S.getLangOpts().CPlusPlus && !FD->hasAttr<GNUInlineAttr>()) | ||||||
6716 | return false; | ||||||
6717 | |||||||
6718 | // Okay, go ahead and call the relatively-more-expensive function. | ||||||
6719 | return S.Context.GetGVALinkageForFunction(FD) == GVA_AvailableExternally; | ||||||
6720 | } | ||||||
6721 | |||||||
6722 | /// Determine whether a variable is extern "C" prior to attaching | ||||||
6723 | /// an initializer. We can't just call isExternC() here, because that | ||||||
6724 | /// will also compute and cache whether the declaration is externally | ||||||
6725 | /// visible, which might change when we attach the initializer. | ||||||
6726 | /// | ||||||
6727 | /// This can only be used if the declaration is known to not be a | ||||||
6728 | /// redeclaration of an internal linkage declaration. | ||||||
6729 | /// | ||||||
6730 | /// For instance: | ||||||
6731 | /// | ||||||
6732 | /// auto x = []{}; | ||||||
6733 | /// | ||||||
6734 | /// Attaching the initializer here makes this declaration not externally | ||||||
6735 | /// visible, because its type has internal linkage. | ||||||
6736 | /// | ||||||
6737 | /// FIXME: This is a hack. | ||||||
6738 | template<typename T> | ||||||
6739 | static bool isIncompleteDeclExternC(Sema &S, const T *D) { | ||||||
6740 | if (S.getLangOpts().CPlusPlus) { | ||||||
6741 | // In C++, the overloadable attribute negates the effects of extern "C". | ||||||
6742 | if (!D->isInExternCContext() || D->template hasAttr<OverloadableAttr>()) | ||||||
6743 | return false; | ||||||
6744 | |||||||
6745 | // So do CUDA's host/device attributes. | ||||||
6746 | if (S.getLangOpts().CUDA && (D->template hasAttr<CUDADeviceAttr>() || | ||||||
6747 | D->template hasAttr<CUDAHostAttr>())) | ||||||
6748 | return false; | ||||||
6749 | } | ||||||
6750 | return D->isExternC(); | ||||||
6751 | } | ||||||
6752 | |||||||
6753 | static bool shouldConsiderLinkage(const VarDecl *VD) { | ||||||
6754 | const DeclContext *DC = VD->getDeclContext()->getRedeclContext(); | ||||||
6755 | if (DC->isFunctionOrMethod() || isa<OMPDeclareReductionDecl>(DC) || | ||||||
6756 | isa<OMPDeclareMapperDecl>(DC)) | ||||||
6757 | return VD->hasExternalStorage(); | ||||||
6758 | if (DC->isFileContext()) | ||||||
6759 | return true; | ||||||
6760 | if (DC->isRecord()) | ||||||
6761 | return false; | ||||||
6762 | if (isa<RequiresExprBodyDecl>(DC)) | ||||||
6763 | return false; | ||||||
6764 | llvm_unreachable("Unexpected context")::llvm::llvm_unreachable_internal("Unexpected context", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 6764); | ||||||
6765 | } | ||||||
6766 | |||||||
6767 | static bool shouldConsiderLinkage(const FunctionDecl *FD) { | ||||||
6768 | const DeclContext *DC = FD->getDeclContext()->getRedeclContext(); | ||||||
6769 | if (DC->isFileContext() || DC->isFunctionOrMethod() || | ||||||
6770 | isa<OMPDeclareReductionDecl>(DC) || isa<OMPDeclareMapperDecl>(DC)) | ||||||
6771 | return true; | ||||||
6772 | if (DC->isRecord()) | ||||||
6773 | return false; | ||||||
6774 | llvm_unreachable("Unexpected context")::llvm::llvm_unreachable_internal("Unexpected context", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 6774); | ||||||
6775 | } | ||||||
6776 | |||||||
6777 | static bool hasParsedAttr(Scope *S, const Declarator &PD, | ||||||
6778 | ParsedAttr::Kind Kind) { | ||||||
6779 | // Check decl attributes on the DeclSpec. | ||||||
6780 | if (PD.getDeclSpec().getAttributes().hasAttribute(Kind)) | ||||||
6781 | return true; | ||||||
6782 | |||||||
6783 | // Walk the declarator structure, checking decl attributes that were in a type | ||||||
6784 | // position to the decl itself. | ||||||
6785 | for (unsigned I = 0, E = PD.getNumTypeObjects(); I != E; ++I) { | ||||||
6786 | if (PD.getTypeObject(I).getAttrs().hasAttribute(Kind)) | ||||||
6787 | return true; | ||||||
6788 | } | ||||||
6789 | |||||||
6790 | // Finally, check attributes on the decl itself. | ||||||
6791 | return PD.getAttributes().hasAttribute(Kind); | ||||||
6792 | } | ||||||
6793 | |||||||
6794 | /// Adjust the \c DeclContext for a function or variable that might be a | ||||||
6795 | /// function-local external declaration. | ||||||
6796 | bool Sema::adjustContextForLocalExternDecl(DeclContext *&DC) { | ||||||
6797 | if (!DC->isFunctionOrMethod()) | ||||||
6798 | return false; | ||||||
6799 | |||||||
6800 | // If this is a local extern function or variable declared within a function | ||||||
6801 | // template, don't add it into the enclosing namespace scope until it is | ||||||
6802 | // instantiated; it might have a dependent type right now. | ||||||
6803 | if (DC->isDependentContext()) | ||||||
6804 | return true; | ||||||
6805 | |||||||
6806 | // C++11 [basic.link]p7: | ||||||
6807 | // When a block scope declaration of an entity with linkage is not found to | ||||||
6808 | // refer to some other declaration, then that entity is a member of the | ||||||
6809 | // innermost enclosing namespace. | ||||||
6810 | // | ||||||
6811 | // Per C++11 [namespace.def]p6, the innermost enclosing namespace is a | ||||||
6812 | // semantically-enclosing namespace, not a lexically-enclosing one. | ||||||
6813 | while (!DC->isFileContext() && !isa<LinkageSpecDecl>(DC)) | ||||||
6814 | DC = DC->getParent(); | ||||||
6815 | return true; | ||||||
6816 | } | ||||||
6817 | |||||||
6818 | /// Returns true if given declaration has external C language linkage. | ||||||
6819 | static bool isDeclExternC(const Decl *D) { | ||||||
6820 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) | ||||||
6821 | return FD->isExternC(); | ||||||
6822 | if (const auto *VD = dyn_cast<VarDecl>(D)) | ||||||
6823 | return VD->isExternC(); | ||||||
6824 | |||||||
6825 | llvm_unreachable("Unknown type of decl!")::llvm::llvm_unreachable_internal("Unknown type of decl!", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 6825); | ||||||
6826 | } | ||||||
6827 | |||||||
6828 | /// Returns true if there hasn't been any invalid type diagnosed. | ||||||
6829 | static bool diagnoseOpenCLTypes(Sema &Se, VarDecl *NewVD) { | ||||||
6830 | DeclContext *DC = NewVD->getDeclContext(); | ||||||
6831 | QualType R = NewVD->getType(); | ||||||
6832 | |||||||
6833 | // OpenCL v2.0 s6.9.b - Image type can only be used as a function argument. | ||||||
6834 | // OpenCL v2.0 s6.13.16.1 - Pipe type can only be used as a function | ||||||
6835 | // argument. | ||||||
6836 | if (R->isImageType() || R->isPipeType()) { | ||||||
6837 | Se.Diag(NewVD->getLocation(), | ||||||
6838 | diag::err_opencl_type_can_only_be_used_as_function_parameter) | ||||||
6839 | << R; | ||||||
6840 | NewVD->setInvalidDecl(); | ||||||
6841 | return false; | ||||||
6842 | } | ||||||
6843 | |||||||
6844 | // OpenCL v1.2 s6.9.r: | ||||||
6845 | // The event type cannot be used to declare a program scope variable. | ||||||
6846 | // OpenCL v2.0 s6.9.q: | ||||||
6847 | // The clk_event_t and reserve_id_t types cannot be declared in program | ||||||
6848 | // scope. | ||||||
6849 | if (NewVD->hasGlobalStorage() && !NewVD->isStaticLocal()) { | ||||||
6850 | if (R->isReserveIDT() || R->isClkEventT() || R->isEventT()) { | ||||||
6851 | Se.Diag(NewVD->getLocation(), | ||||||
6852 | diag::err_invalid_type_for_program_scope_var) | ||||||
6853 | << R; | ||||||
6854 | NewVD->setInvalidDecl(); | ||||||
6855 | return false; | ||||||
6856 | } | ||||||
6857 | } | ||||||
6858 | |||||||
6859 | // OpenCL v1.0 s6.8.a.3: Pointers to functions are not allowed. | ||||||
6860 | if (!Se.getOpenCLOptions().isAvailableOption("__cl_clang_function_pointers", | ||||||
6861 | Se.getLangOpts())) { | ||||||
6862 | QualType NR = R.getCanonicalType(); | ||||||
6863 | while (NR->isPointerType() || NR->isMemberFunctionPointerType() || | ||||||
6864 | NR->isReferenceType()) { | ||||||
6865 | if (NR->isFunctionPointerType() || NR->isMemberFunctionPointerType() || | ||||||
6866 | NR->isFunctionReferenceType()) { | ||||||
6867 | Se.Diag(NewVD->getLocation(), diag::err_opencl_function_pointer) | ||||||
6868 | << NR->isReferenceType(); | ||||||
6869 | NewVD->setInvalidDecl(); | ||||||
6870 | return false; | ||||||
6871 | } | ||||||
6872 | NR = NR->getPointeeType(); | ||||||
6873 | } | ||||||
6874 | } | ||||||
6875 | |||||||
6876 | if (!Se.getOpenCLOptions().isAvailableOption("cl_khr_fp16", | ||||||
6877 | Se.getLangOpts())) { | ||||||
6878 | // OpenCL v1.2 s6.1.1.1: reject declaring variables of the half and | ||||||
6879 | // half array type (unless the cl_khr_fp16 extension is enabled). | ||||||
6880 | if (Se.Context.getBaseElementType(R)->isHalfType()) { | ||||||
6881 | Se.Diag(NewVD->getLocation(), diag::err_opencl_half_declaration) << R; | ||||||
6882 | NewVD->setInvalidDecl(); | ||||||
6883 | return false; | ||||||
6884 | } | ||||||
6885 | } | ||||||
6886 | |||||||
6887 | // OpenCL v1.2 s6.9.r: | ||||||
6888 | // The event type cannot be used with the __local, __constant and __global | ||||||
6889 | // address space qualifiers. | ||||||
6890 | if (R->isEventT()) { | ||||||
6891 | if (R.getAddressSpace() != LangAS::opencl_private) { | ||||||
6892 | Se.Diag(NewVD->getBeginLoc(), diag::err_event_t_addr_space_qual); | ||||||
6893 | NewVD->setInvalidDecl(); | ||||||
6894 | return false; | ||||||
6895 | } | ||||||
6896 | } | ||||||
6897 | |||||||
6898 | if (R->isSamplerT()) { | ||||||
6899 | // OpenCL v1.2 s6.9.b p4: | ||||||
6900 | // The sampler type cannot be used with the __local and __global address | ||||||
6901 | // space qualifiers. | ||||||
6902 | if (R.getAddressSpace() == LangAS::opencl_local || | ||||||
6903 | R.getAddressSpace() == LangAS::opencl_global) { | ||||||
6904 | Se.Diag(NewVD->getLocation(), diag::err_wrong_sampler_addressspace); | ||||||
6905 | NewVD->setInvalidDecl(); | ||||||
6906 | } | ||||||
6907 | |||||||
6908 | // OpenCL v1.2 s6.12.14.1: | ||||||
6909 | // A global sampler must be declared with either the constant address | ||||||
6910 | // space qualifier or with the const qualifier. | ||||||
6911 | if (DC->isTranslationUnit() && | ||||||
6912 | !(R.getAddressSpace() == LangAS::opencl_constant || | ||||||
6913 | R.isConstQualified())) { | ||||||
6914 | Se.Diag(NewVD->getLocation(), diag::err_opencl_nonconst_global_sampler); | ||||||
6915 | NewVD->setInvalidDecl(); | ||||||
6916 | } | ||||||
6917 | if (NewVD->isInvalidDecl()) | ||||||
6918 | return false; | ||||||
6919 | } | ||||||
6920 | |||||||
6921 | return true; | ||||||
6922 | } | ||||||
6923 | |||||||
6924 | template <typename AttrTy> | ||||||
6925 | static void copyAttrFromTypedefToDecl(Sema &S, Decl *D, const TypedefType *TT) { | ||||||
6926 | const TypedefNameDecl *TND = TT->getDecl(); | ||||||
6927 | if (const auto *Attribute = TND->getAttr<AttrTy>()) { | ||||||
6928 | AttrTy *Clone = Attribute->clone(S.Context); | ||||||
6929 | Clone->setInherited(true); | ||||||
6930 | D->addAttr(Clone); | ||||||
6931 | } | ||||||
6932 | } | ||||||
6933 | |||||||
6934 | NamedDecl *Sema::ActOnVariableDeclarator( | ||||||
6935 | Scope *S, Declarator &D, DeclContext *DC, TypeSourceInfo *TInfo, | ||||||
6936 | LookupResult &Previous, MultiTemplateParamsArg TemplateParamLists, | ||||||
6937 | bool &AddToScope, ArrayRef<BindingDecl *> Bindings) { | ||||||
6938 | QualType R = TInfo->getType(); | ||||||
6939 | DeclarationName Name = GetNameForDeclarator(D).getName(); | ||||||
6940 | |||||||
6941 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | ||||||
6942 | |||||||
6943 | if (D.isDecompositionDeclarator()) { | ||||||
6944 | // Take the name of the first declarator as our name for diagnostic | ||||||
6945 | // purposes. | ||||||
6946 | auto &Decomp = D.getDecompositionDeclarator(); | ||||||
6947 | if (!Decomp.bindings().empty()) { | ||||||
6948 | II = Decomp.bindings()[0].Name; | ||||||
6949 | Name = II; | ||||||
6950 | } | ||||||
6951 | } else if (!II) { | ||||||
6952 | Diag(D.getIdentifierLoc(), diag::err_bad_variable_name) << Name; | ||||||
6953 | return nullptr; | ||||||
6954 | } | ||||||
6955 | |||||||
6956 | |||||||
6957 | DeclSpec::SCS SCSpec = D.getDeclSpec().getStorageClassSpec(); | ||||||
6958 | StorageClass SC = StorageClassSpecToVarDeclStorageClass(D.getDeclSpec()); | ||||||
6959 | |||||||
6960 | // dllimport globals without explicit storage class are treated as extern. We | ||||||
6961 | // have to change the storage class this early to get the right DeclContext. | ||||||
6962 | if (SC == SC_None && !DC->isRecord() && | ||||||
6963 | hasParsedAttr(S, D, ParsedAttr::AT_DLLImport) && | ||||||
6964 | !hasParsedAttr(S, D, ParsedAttr::AT_DLLExport)) | ||||||
6965 | SC = SC_Extern; | ||||||
6966 | |||||||
6967 | DeclContext *OriginalDC = DC; | ||||||
6968 | bool IsLocalExternDecl = SC == SC_Extern && | ||||||
6969 | adjustContextForLocalExternDecl(DC); | ||||||
6970 | |||||||
6971 | if (SCSpec == DeclSpec::SCS_mutable) { | ||||||
6972 | // mutable can only appear on non-static class members, so it's always | ||||||
6973 | // an error here | ||||||
6974 | Diag(D.getIdentifierLoc(), diag::err_mutable_nonmember); | ||||||
6975 | D.setInvalidType(); | ||||||
6976 | SC = SC_None; | ||||||
6977 | } | ||||||
6978 | |||||||
6979 | if (getLangOpts().CPlusPlus11 && SCSpec == DeclSpec::SCS_register && | ||||||
6980 | !D.getAsmLabel() && !getSourceManager().isInSystemMacro( | ||||||
6981 | D.getDeclSpec().getStorageClassSpecLoc())) { | ||||||
6982 | // In C++11, the 'register' storage class specifier is deprecated. | ||||||
6983 | // Suppress the warning in system macros, it's used in macros in some | ||||||
6984 | // popular C system headers, such as in glibc's htonl() macro. | ||||||
6985 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
6986 | getLangOpts().CPlusPlus17 ? diag::ext_register_storage_class | ||||||
6987 | : diag::warn_deprecated_register) | ||||||
6988 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
6989 | } | ||||||
6990 | |||||||
6991 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
6992 | |||||||
6993 | if (!DC->isRecord() && S->getFnParent() == nullptr) { | ||||||
6994 | // C99 6.9p2: The storage-class specifiers auto and register shall not | ||||||
6995 | // appear in the declaration specifiers in an external declaration. | ||||||
6996 | // Global Register+Asm is a GNU extension we support. | ||||||
6997 | if (SC == SC_Auto || (SC == SC_Register && !D.getAsmLabel())) { | ||||||
6998 | Diag(D.getIdentifierLoc(), diag::err_typecheck_sclass_fscope); | ||||||
6999 | D.setInvalidType(); | ||||||
7000 | } | ||||||
7001 | } | ||||||
7002 | |||||||
7003 | // If this variable has a VLA type and an initializer, try to | ||||||
7004 | // fold to a constant-sized type. This is otherwise invalid. | ||||||
7005 | if (D.hasInitializer() && R->isVariableArrayType()) | ||||||
7006 | tryToFixVariablyModifiedVarType(TInfo, R, D.getIdentifierLoc(), | ||||||
7007 | /*DiagID=*/0); | ||||||
7008 | |||||||
7009 | bool IsMemberSpecialization = false; | ||||||
7010 | bool IsVariableTemplateSpecialization = false; | ||||||
7011 | bool IsPartialSpecialization = false; | ||||||
7012 | bool IsVariableTemplate = false; | ||||||
7013 | VarDecl *NewVD = nullptr; | ||||||
7014 | VarTemplateDecl *NewTemplate = nullptr; | ||||||
7015 | TemplateParameterList *TemplateParams = nullptr; | ||||||
7016 | if (!getLangOpts().CPlusPlus) { | ||||||
7017 | NewVD = VarDecl::Create(Context, DC, D.getBeginLoc(), D.getIdentifierLoc(), | ||||||
7018 | II, R, TInfo, SC); | ||||||
7019 | |||||||
7020 | if (R->getContainedDeducedType()) | ||||||
7021 | ParsingInitForAutoVars.insert(NewVD); | ||||||
7022 | |||||||
7023 | if (D.isInvalidType()) | ||||||
7024 | NewVD->setInvalidDecl(); | ||||||
7025 | |||||||
7026 | if (NewVD->getType().hasNonTrivialToPrimitiveDestructCUnion() && | ||||||
7027 | NewVD->hasLocalStorage()) | ||||||
7028 | checkNonTrivialCUnion(NewVD->getType(), NewVD->getLocation(), | ||||||
7029 | NTCUC_AutoVar, NTCUK_Destruct); | ||||||
7030 | } else { | ||||||
7031 | bool Invalid = false; | ||||||
7032 | |||||||
7033 | if (DC->isRecord() && !CurContext->isRecord()) { | ||||||
7034 | // This is an out-of-line definition of a static data member. | ||||||
7035 | switch (SC) { | ||||||
7036 | case SC_None: | ||||||
7037 | break; | ||||||
7038 | case SC_Static: | ||||||
7039 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
7040 | diag::err_static_out_of_line) | ||||||
7041 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
7042 | break; | ||||||
7043 | case SC_Auto: | ||||||
7044 | case SC_Register: | ||||||
7045 | case SC_Extern: | ||||||
7046 | // [dcl.stc] p2: The auto or register specifiers shall be applied only | ||||||
7047 | // to names of variables declared in a block or to function parameters. | ||||||
7048 | // [dcl.stc] p6: The extern specifier cannot be used in the declaration | ||||||
7049 | // of class members | ||||||
7050 | |||||||
7051 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
7052 | diag::err_storage_class_for_static_member) | ||||||
7053 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
7054 | break; | ||||||
7055 | case SC_PrivateExtern: | ||||||
7056 | llvm_unreachable("C storage class in c++!")::llvm::llvm_unreachable_internal("C storage class in c++!", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 7056); | ||||||
7057 | } | ||||||
7058 | } | ||||||
7059 | |||||||
7060 | if (SC == SC_Static && CurContext->isRecord()) { | ||||||
7061 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) { | ||||||
7062 | // Walk up the enclosing DeclContexts to check for any that are | ||||||
7063 | // incompatible with static data members. | ||||||
7064 | const DeclContext *FunctionOrMethod = nullptr; | ||||||
7065 | const CXXRecordDecl *AnonStruct = nullptr; | ||||||
7066 | for (DeclContext *Ctxt = DC; Ctxt; Ctxt = Ctxt->getParent()) { | ||||||
7067 | if (Ctxt->isFunctionOrMethod()) { | ||||||
7068 | FunctionOrMethod = Ctxt; | ||||||
7069 | break; | ||||||
7070 | } | ||||||
7071 | const CXXRecordDecl *ParentDecl = dyn_cast<CXXRecordDecl>(Ctxt); | ||||||
7072 | if (ParentDecl && !ParentDecl->getDeclName()) { | ||||||
7073 | AnonStruct = ParentDecl; | ||||||
7074 | break; | ||||||
7075 | } | ||||||
7076 | } | ||||||
7077 | if (FunctionOrMethod) { | ||||||
7078 | // C++ [class.static.data]p5: A local class shall not have static data | ||||||
7079 | // members. | ||||||
7080 | Diag(D.getIdentifierLoc(), | ||||||
7081 | diag::err_static_data_member_not_allowed_in_local_class) | ||||||
7082 | << Name << RD->getDeclName() << RD->getTagKind(); | ||||||
7083 | } else if (AnonStruct) { | ||||||
7084 | // C++ [class.static.data]p4: Unnamed classes and classes contained | ||||||
7085 | // directly or indirectly within unnamed classes shall not contain | ||||||
7086 | // static data members. | ||||||
7087 | Diag(D.getIdentifierLoc(), | ||||||
7088 | diag::err_static_data_member_not_allowed_in_anon_struct) | ||||||
7089 | << Name << AnonStruct->getTagKind(); | ||||||
7090 | Invalid = true; | ||||||
7091 | } else if (RD->isUnion()) { | ||||||
7092 | // C++98 [class.union]p1: If a union contains a static data member, | ||||||
7093 | // the program is ill-formed. C++11 drops this restriction. | ||||||
7094 | Diag(D.getIdentifierLoc(), | ||||||
7095 | getLangOpts().CPlusPlus11 | ||||||
7096 | ? diag::warn_cxx98_compat_static_data_member_in_union | ||||||
7097 | : diag::ext_static_data_member_in_union) << Name; | ||||||
7098 | } | ||||||
7099 | } | ||||||
7100 | } | ||||||
7101 | |||||||
7102 | // Match up the template parameter lists with the scope specifier, then | ||||||
7103 | // determine whether we have a template or a template specialization. | ||||||
7104 | bool InvalidScope = false; | ||||||
7105 | TemplateParams = MatchTemplateParametersToScopeSpecifier( | ||||||
7106 | D.getDeclSpec().getBeginLoc(), D.getIdentifierLoc(), | ||||||
7107 | D.getCXXScopeSpec(), | ||||||
7108 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId | ||||||
7109 | ? D.getName().TemplateId | ||||||
7110 | : nullptr, | ||||||
7111 | TemplateParamLists, | ||||||
7112 | /*never a friend*/ false, IsMemberSpecialization, InvalidScope); | ||||||
7113 | Invalid |= InvalidScope; | ||||||
7114 | |||||||
7115 | if (TemplateParams) { | ||||||
7116 | if (!TemplateParams->size() && | ||||||
7117 | D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) { | ||||||
7118 | // There is an extraneous 'template<>' for this variable. Complain | ||||||
7119 | // about it, but allow the declaration of the variable. | ||||||
7120 | Diag(TemplateParams->getTemplateLoc(), | ||||||
7121 | diag::err_template_variable_noparams) | ||||||
7122 | << II | ||||||
7123 | << SourceRange(TemplateParams->getTemplateLoc(), | ||||||
7124 | TemplateParams->getRAngleLoc()); | ||||||
7125 | TemplateParams = nullptr; | ||||||
7126 | } else { | ||||||
7127 | // Check that we can declare a template here. | ||||||
7128 | if (CheckTemplateDeclScope(S, TemplateParams)) | ||||||
7129 | return nullptr; | ||||||
7130 | |||||||
7131 | if (D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId) { | ||||||
7132 | // This is an explicit specialization or a partial specialization. | ||||||
7133 | IsVariableTemplateSpecialization = true; | ||||||
7134 | IsPartialSpecialization = TemplateParams->size() > 0; | ||||||
7135 | } else { // if (TemplateParams->size() > 0) | ||||||
7136 | // This is a template declaration. | ||||||
7137 | IsVariableTemplate = true; | ||||||
7138 | |||||||
7139 | // Only C++1y supports variable templates (N3651). | ||||||
7140 | Diag(D.getIdentifierLoc(), | ||||||
7141 | getLangOpts().CPlusPlus14 | ||||||
7142 | ? diag::warn_cxx11_compat_variable_template | ||||||
7143 | : diag::ext_variable_template); | ||||||
7144 | } | ||||||
7145 | } | ||||||
7146 | } else { | ||||||
7147 | // Check that we can declare a member specialization here. | ||||||
7148 | if (!TemplateParamLists.empty() && IsMemberSpecialization && | ||||||
7149 | CheckTemplateDeclScope(S, TemplateParamLists.back())) | ||||||
7150 | return nullptr; | ||||||
7151 | assert((Invalid ||(static_cast <bool> ((Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 7153, __extension__ __PRETTY_FUNCTION__)) | ||||||
7152 | D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) &&(static_cast <bool> ((Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 7153, __extension__ __PRETTY_FUNCTION__)) | ||||||
7153 | "should have a 'template<>' for this decl")(static_cast <bool> ((Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 7153, __extension__ __PRETTY_FUNCTION__)); | ||||||
7154 | } | ||||||
7155 | |||||||
7156 | if (IsVariableTemplateSpecialization) { | ||||||
7157 | SourceLocation TemplateKWLoc = | ||||||
7158 | TemplateParamLists.size() > 0 | ||||||
7159 | ? TemplateParamLists[0]->getTemplateLoc() | ||||||
7160 | : SourceLocation(); | ||||||
7161 | DeclResult Res = ActOnVarTemplateSpecialization( | ||||||
7162 | S, D, TInfo, TemplateKWLoc, TemplateParams, SC, | ||||||
7163 | IsPartialSpecialization); | ||||||
7164 | if (Res.isInvalid()) | ||||||
7165 | return nullptr; | ||||||
7166 | NewVD = cast<VarDecl>(Res.get()); | ||||||
7167 | AddToScope = false; | ||||||
7168 | } else if (D.isDecompositionDeclarator()) { | ||||||
7169 | NewVD = DecompositionDecl::Create(Context, DC, D.getBeginLoc(), | ||||||
7170 | D.getIdentifierLoc(), R, TInfo, SC, | ||||||
7171 | Bindings); | ||||||
7172 | } else | ||||||
7173 | NewVD = VarDecl::Create(Context, DC, D.getBeginLoc(), | ||||||
7174 | D.getIdentifierLoc(), II, R, TInfo, SC); | ||||||
7175 | |||||||
7176 | // If this is supposed to be a variable template, create it as such. | ||||||
7177 | if (IsVariableTemplate) { | ||||||
7178 | NewTemplate = | ||||||
7179 | VarTemplateDecl::Create(Context, DC, D.getIdentifierLoc(), Name, | ||||||
7180 | TemplateParams, NewVD); | ||||||
7181 | NewVD->setDescribedVarTemplate(NewTemplate); | ||||||
7182 | } | ||||||
7183 | |||||||
7184 | // If this decl has an auto type in need of deduction, make a note of the | ||||||
7185 | // Decl so we can diagnose uses of it in its own initializer. | ||||||
7186 | if (R->getContainedDeducedType()) | ||||||
7187 | ParsingInitForAutoVars.insert(NewVD); | ||||||
7188 | |||||||
7189 | if (D.isInvalidType() || Invalid) { | ||||||
7190 | NewVD->setInvalidDecl(); | ||||||
7191 | if (NewTemplate) | ||||||
7192 | NewTemplate->setInvalidDecl(); | ||||||
7193 | } | ||||||
7194 | |||||||
7195 | SetNestedNameSpecifier(*this, NewVD, D); | ||||||
7196 | |||||||
7197 | // If we have any template parameter lists that don't directly belong to | ||||||
7198 | // the variable (matching the scope specifier), store them. | ||||||
7199 | unsigned VDTemplateParamLists = TemplateParams ? 1 : 0; | ||||||
7200 | if (TemplateParamLists.size() > VDTemplateParamLists) | ||||||
7201 | NewVD->setTemplateParameterListsInfo( | ||||||
7202 | Context, TemplateParamLists.drop_back(VDTemplateParamLists)); | ||||||
7203 | } | ||||||
7204 | |||||||
7205 | if (D.getDeclSpec().isInlineSpecified()) { | ||||||
7206 | if (!getLangOpts().CPlusPlus) { | ||||||
7207 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
7208 | << 0; | ||||||
7209 | } else if (CurContext->isFunctionOrMethod()) { | ||||||
7210 | // 'inline' is not allowed on block scope variable declaration. | ||||||
7211 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
7212 | diag::err_inline_declaration_block_scope) << Name | ||||||
7213 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); | ||||||
7214 | } else { | ||||||
7215 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
7216 | getLangOpts().CPlusPlus17 ? diag::warn_cxx14_compat_inline_variable | ||||||
7217 | : diag::ext_inline_variable); | ||||||
7218 | NewVD->setInlineSpecified(); | ||||||
7219 | } | ||||||
7220 | } | ||||||
7221 | |||||||
7222 | // Set the lexical context. If the declarator has a C++ scope specifier, the | ||||||
7223 | // lexical context will be different from the semantic context. | ||||||
7224 | NewVD->setLexicalDeclContext(CurContext); | ||||||
7225 | if (NewTemplate) | ||||||
7226 | NewTemplate->setLexicalDeclContext(CurContext); | ||||||
7227 | |||||||
7228 | if (IsLocalExternDecl) { | ||||||
7229 | if (D.isDecompositionDeclarator()) | ||||||
7230 | for (auto *B : Bindings) | ||||||
7231 | B->setLocalExternDecl(); | ||||||
7232 | else | ||||||
7233 | NewVD->setLocalExternDecl(); | ||||||
7234 | } | ||||||
7235 | |||||||
7236 | bool EmitTLSUnsupportedError = false; | ||||||
7237 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) { | ||||||
7238 | // C++11 [dcl.stc]p4: | ||||||
7239 | // When thread_local is applied to a variable of block scope the | ||||||
7240 | // storage-class-specifier static is implied if it does not appear | ||||||
7241 | // explicitly. | ||||||
7242 | // Core issue: 'static' is not implied if the variable is declared | ||||||
7243 | // 'extern'. | ||||||
7244 | if (NewVD->hasLocalStorage() && | ||||||
7245 | (SCSpec != DeclSpec::SCS_unspecified || | ||||||
7246 | TSCS != DeclSpec::TSCS_thread_local || | ||||||
7247 | !DC->isFunctionOrMethod())) | ||||||
7248 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7249 | diag::err_thread_non_global) | ||||||
7250 | << DeclSpec::getSpecifierName(TSCS); | ||||||
7251 | else if (!Context.getTargetInfo().isTLSSupported()) { | ||||||
7252 | if (getLangOpts().CUDA || getLangOpts().OpenMPIsDevice || | ||||||
7253 | getLangOpts().SYCLIsDevice) { | ||||||
7254 | // Postpone error emission until we've collected attributes required to | ||||||
7255 | // figure out whether it's a host or device variable and whether the | ||||||
7256 | // error should be ignored. | ||||||
7257 | EmitTLSUnsupportedError = true; | ||||||
7258 | // We still need to mark the variable as TLS so it shows up in AST with | ||||||
7259 | // proper storage class for other tools to use even if we're not going | ||||||
7260 | // to emit any code for it. | ||||||
7261 | NewVD->setTSCSpec(TSCS); | ||||||
7262 | } else | ||||||
7263 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7264 | diag::err_thread_unsupported); | ||||||
7265 | } else | ||||||
7266 | NewVD->setTSCSpec(TSCS); | ||||||
7267 | } | ||||||
7268 | |||||||
7269 | switch (D.getDeclSpec().getConstexprSpecifier()) { | ||||||
7270 | case ConstexprSpecKind::Unspecified: | ||||||
7271 | break; | ||||||
7272 | |||||||
7273 | case ConstexprSpecKind::Consteval: | ||||||
7274 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
7275 | diag::err_constexpr_wrong_decl_kind) | ||||||
7276 | << static_cast<int>(D.getDeclSpec().getConstexprSpecifier()); | ||||||
7277 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
7278 | |||||||
7279 | case ConstexprSpecKind::Constexpr: | ||||||
7280 | NewVD->setConstexpr(true); | ||||||
7281 | // C++1z [dcl.spec.constexpr]p1: | ||||||
7282 | // A static data member declared with the constexpr specifier is | ||||||
7283 | // implicitly an inline variable. | ||||||
7284 | if (NewVD->isStaticDataMember() && | ||||||
7285 | (getLangOpts().CPlusPlus17 || | ||||||
7286 | Context.getTargetInfo().getCXXABI().isMicrosoft())) | ||||||
7287 | NewVD->setImplicitlyInline(); | ||||||
7288 | break; | ||||||
7289 | |||||||
7290 | case ConstexprSpecKind::Constinit: | ||||||
7291 | if (!NewVD->hasGlobalStorage()) | ||||||
7292 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
7293 | diag::err_constinit_local_variable); | ||||||
7294 | else | ||||||
7295 | NewVD->addAttr(ConstInitAttr::Create( | ||||||
7296 | Context, D.getDeclSpec().getConstexprSpecLoc(), | ||||||
7297 | AttributeCommonInfo::AS_Keyword, ConstInitAttr::Keyword_constinit)); | ||||||
7298 | break; | ||||||
7299 | } | ||||||
7300 | |||||||
7301 | // C99 6.7.4p3 | ||||||
7302 | // An inline definition of a function with external linkage shall | ||||||
7303 | // not contain a definition of a modifiable object with static or | ||||||
7304 | // thread storage duration... | ||||||
7305 | // We only apply this when the function is required to be defined | ||||||
7306 | // elsewhere, i.e. when the function is not 'extern inline'. Note | ||||||
7307 | // that a local variable with thread storage duration still has to | ||||||
7308 | // be marked 'static'. Also note that it's possible to get these | ||||||
7309 | // semantics in C++ using __attribute__((gnu_inline)). | ||||||
7310 | if (SC == SC_Static && S->getFnParent() != nullptr && | ||||||
7311 | !NewVD->getType().isConstQualified()) { | ||||||
7312 | FunctionDecl *CurFD = getCurFunctionDecl(); | ||||||
7313 | if (CurFD && isFunctionDefinitionDiscarded(*this, CurFD)) { | ||||||
7314 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
7315 | diag::warn_static_local_in_extern_inline); | ||||||
7316 | MaybeSuggestAddingStaticToDecl(CurFD); | ||||||
7317 | } | ||||||
7318 | } | ||||||
7319 | |||||||
7320 | if (D.getDeclSpec().isModulePrivateSpecified()) { | ||||||
7321 | if (IsVariableTemplateSpecialization) | ||||||
7322 | Diag(NewVD->getLocation(), diag::err_module_private_specialization) | ||||||
7323 | << (IsPartialSpecialization ? 1 : 0) | ||||||
7324 | << FixItHint::CreateRemoval( | ||||||
7325 | D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
7326 | else if (IsMemberSpecialization) | ||||||
7327 | Diag(NewVD->getLocation(), diag::err_module_private_specialization) | ||||||
7328 | << 2 | ||||||
7329 | << FixItHint::CreateRemoval(D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
7330 | else if (NewVD->hasLocalStorage()) | ||||||
7331 | Diag(NewVD->getLocation(), diag::err_module_private_local) | ||||||
7332 | << 0 << NewVD | ||||||
7333 | << SourceRange(D.getDeclSpec().getModulePrivateSpecLoc()) | ||||||
7334 | << FixItHint::CreateRemoval( | ||||||
7335 | D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
7336 | else { | ||||||
7337 | NewVD->setModulePrivate(); | ||||||
7338 | if (NewTemplate) | ||||||
7339 | NewTemplate->setModulePrivate(); | ||||||
7340 | for (auto *B : Bindings) | ||||||
7341 | B->setModulePrivate(); | ||||||
7342 | } | ||||||
7343 | } | ||||||
7344 | |||||||
7345 | if (getLangOpts().OpenCL) { | ||||||
7346 | deduceOpenCLAddressSpace(NewVD); | ||||||
7347 | |||||||
7348 | DeclSpec::TSCS TSC = D.getDeclSpec().getThreadStorageClassSpec(); | ||||||
7349 | if (TSC != TSCS_unspecified) { | ||||||
7350 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7351 | diag::err_opencl_unknown_type_specifier) | ||||||
7352 | << getLangOpts().getOpenCLVersionString() | ||||||
7353 | << DeclSpec::getSpecifierName(TSC) << 1; | ||||||
7354 | NewVD->setInvalidDecl(); | ||||||
7355 | } | ||||||
7356 | } | ||||||
7357 | |||||||
7358 | // Handle attributes prior to checking for duplicates in MergeVarDecl | ||||||
7359 | ProcessDeclAttributes(S, NewVD, D); | ||||||
7360 | |||||||
7361 | // FIXME: This is probably the wrong location to be doing this and we should | ||||||
7362 | // probably be doing this for more attributes (especially for function | ||||||
7363 | // pointer attributes such as format, warn_unused_result, etc.). Ideally | ||||||
7364 | // the code to copy attributes would be generated by TableGen. | ||||||
7365 | if (R->isFunctionPointerType()) | ||||||
7366 | if (const auto *TT = R->getAs<TypedefType>()) | ||||||
7367 | copyAttrFromTypedefToDecl<AllocSizeAttr>(*this, NewVD, TT); | ||||||
7368 | |||||||
7369 | if (getLangOpts().CUDA || getLangOpts().OpenMPIsDevice || | ||||||
7370 | getLangOpts().SYCLIsDevice) { | ||||||
7371 | if (EmitTLSUnsupportedError && | ||||||
7372 | ((getLangOpts().CUDA && DeclAttrsMatchCUDAMode(getLangOpts(), NewVD)) || | ||||||
7373 | (getLangOpts().OpenMPIsDevice && | ||||||
7374 | OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(NewVD)))) | ||||||
7375 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7376 | diag::err_thread_unsupported); | ||||||
7377 | |||||||
7378 | if (EmitTLSUnsupportedError && | ||||||
7379 | (LangOpts.SYCLIsDevice || (LangOpts.OpenMP && LangOpts.OpenMPIsDevice))) | ||||||
7380 | targetDiag(D.getIdentifierLoc(), diag::err_thread_unsupported); | ||||||
7381 | // CUDA B.2.5: "__shared__ and __constant__ variables have implied static | ||||||
7382 | // storage [duration]." | ||||||
7383 | if (SC == SC_None && S->getFnParent() != nullptr && | ||||||
7384 | (NewVD->hasAttr<CUDASharedAttr>() || | ||||||
7385 | NewVD->hasAttr<CUDAConstantAttr>())) { | ||||||
7386 | NewVD->setStorageClass(SC_Static); | ||||||
7387 | } | ||||||
7388 | } | ||||||
7389 | |||||||
7390 | // Ensure that dllimport globals without explicit storage class are treated as | ||||||
7391 | // extern. The storage class is set above using parsed attributes. Now we can | ||||||
7392 | // check the VarDecl itself. | ||||||
7393 | assert(!NewVD->hasAttr<DLLImportAttr>() ||(static_cast <bool> (!NewVD->hasAttr<DLLImportAttr >() || NewVD->getAttr<DLLImportAttr>()->isInherited () || NewVD->isStaticDataMember() || NewVD->getStorageClass () != SC_None) ? void (0) : __assert_fail ("!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr<DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 7395, __extension__ __PRETTY_FUNCTION__)) | ||||||
7394 | NewVD->getAttr<DLLImportAttr>()->isInherited() ||(static_cast <bool> (!NewVD->hasAttr<DLLImportAttr >() || NewVD->getAttr<DLLImportAttr>()->isInherited () || NewVD->isStaticDataMember() || NewVD->getStorageClass () != SC_None) ? void (0) : __assert_fail ("!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr<DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 7395, __extension__ __PRETTY_FUNCTION__)) | ||||||
7395 | NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None)(static_cast <bool> (!NewVD->hasAttr<DLLImportAttr >() || NewVD->getAttr<DLLImportAttr>()->isInherited () || NewVD->isStaticDataMember() || NewVD->getStorageClass () != SC_None) ? void (0) : __assert_fail ("!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr<DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 7395, __extension__ __PRETTY_FUNCTION__)); | ||||||
7396 | |||||||
7397 | // In auto-retain/release, infer strong retension for variables of | ||||||
7398 | // retainable type. | ||||||
7399 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewVD)) | ||||||
7400 | NewVD->setInvalidDecl(); | ||||||
7401 | |||||||
7402 | // Handle GNU asm-label extension (encoded as an attribute). | ||||||
7403 | if (Expr *E = (Expr*)D.getAsmLabel()) { | ||||||
7404 | // The parser guarantees this is a string. | ||||||
7405 | StringLiteral *SE = cast<StringLiteral>(E); | ||||||
7406 | StringRef Label = SE->getString(); | ||||||
7407 | if (S->getFnParent() != nullptr) { | ||||||
7408 | switch (SC) { | ||||||
7409 | case SC_None: | ||||||
7410 | case SC_Auto: | ||||||
7411 | Diag(E->getExprLoc(), diag::warn_asm_label_on_auto_decl) << Label; | ||||||
7412 | break; | ||||||
7413 | case SC_Register: | ||||||
7414 | // Local Named register | ||||||
7415 | if (!Context.getTargetInfo().isValidGCCRegisterName(Label) && | ||||||
7416 | DeclAttrsMatchCUDAMode(getLangOpts(), getCurFunctionDecl())) | ||||||
7417 | Diag(E->getExprLoc(), diag::err_asm_unknown_register_name) << Label; | ||||||
7418 | break; | ||||||
7419 | case SC_Static: | ||||||
7420 | case SC_Extern: | ||||||
7421 | case SC_PrivateExtern: | ||||||
7422 | break; | ||||||
7423 | } | ||||||
7424 | } else if (SC == SC_Register) { | ||||||
7425 | // Global Named register | ||||||
7426 | if (DeclAttrsMatchCUDAMode(getLangOpts(), NewVD)) { | ||||||
7427 | const auto &TI = Context.getTargetInfo(); | ||||||
7428 | bool HasSizeMismatch; | ||||||
7429 | |||||||
7430 | if (!TI.isValidGCCRegisterName(Label)) | ||||||
7431 | Diag(E->getExprLoc(), diag::err_asm_unknown_register_name) << Label; | ||||||
7432 | else if (!TI.validateGlobalRegisterVariable(Label, | ||||||
7433 | Context.getTypeSize(R), | ||||||
7434 | HasSizeMismatch)) | ||||||
7435 | Diag(E->getExprLoc(), diag::err_asm_invalid_global_var_reg) << Label; | ||||||
7436 | else if (HasSizeMismatch) | ||||||
7437 | Diag(E->getExprLoc(), diag::err_asm_register_size_mismatch) << Label; | ||||||
7438 | } | ||||||
7439 | |||||||
7440 | if (!R->isIntegralType(Context) && !R->isPointerType()) { | ||||||
7441 | Diag(D.getBeginLoc(), diag::err_asm_bad_register_type); | ||||||
7442 | NewVD->setInvalidDecl(true); | ||||||
7443 | } | ||||||
7444 | } | ||||||
7445 | |||||||
7446 | NewVD->addAttr(AsmLabelAttr::Create(Context, Label, | ||||||
7447 | /*IsLiteralLabel=*/true, | ||||||
7448 | SE->getStrTokenLoc(0))); | ||||||
7449 | } else if (!ExtnameUndeclaredIdentifiers.empty()) { | ||||||
7450 | llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*>::iterator I = | ||||||
7451 | ExtnameUndeclaredIdentifiers.find(NewVD->getIdentifier()); | ||||||
7452 | if (I != ExtnameUndeclaredIdentifiers.end()) { | ||||||
7453 | if (isDeclExternC(NewVD)) { | ||||||
7454 | NewVD->addAttr(I->second); | ||||||
7455 | ExtnameUndeclaredIdentifiers.erase(I); | ||||||
7456 | } else | ||||||
7457 | Diag(NewVD->getLocation(), diag::warn_redefine_extname_not_applied) | ||||||
7458 | << /*Variable*/1 << NewVD; | ||||||
7459 | } | ||||||
7460 | } | ||||||
7461 | |||||||
7462 | // Find the shadowed declaration before filtering for scope. | ||||||
7463 | NamedDecl *ShadowedDecl = D.getCXXScopeSpec().isEmpty() | ||||||
7464 | ? getShadowedDeclaration(NewVD, Previous) | ||||||
7465 | : nullptr; | ||||||
7466 | |||||||
7467 | // Don't consider existing declarations that are in a different | ||||||
7468 | // scope and are out-of-semantic-context declarations (if the new | ||||||
7469 | // declaration has linkage). | ||||||
7470 | FilterLookupForScope(Previous, OriginalDC, S, shouldConsiderLinkage(NewVD), | ||||||
7471 | D.getCXXScopeSpec().isNotEmpty() || | ||||||
7472 | IsMemberSpecialization || | ||||||
7473 | IsVariableTemplateSpecialization); | ||||||
7474 | |||||||
7475 | // Check whether the previous declaration is in the same block scope. This | ||||||
7476 | // affects whether we merge types with it, per C++11 [dcl.array]p3. | ||||||
7477 | if (getLangOpts().CPlusPlus && | ||||||
7478 | NewVD->isLocalVarDecl() && NewVD->hasExternalStorage()) | ||||||
7479 | NewVD->setPreviousDeclInSameBlockScope( | ||||||
7480 | Previous.isSingleResult() && !Previous.isShadowed() && | ||||||
7481 | isDeclInScope(Previous.getFoundDecl(), OriginalDC, S, false)); | ||||||
7482 | |||||||
7483 | if (!getLangOpts().CPlusPlus) { | ||||||
7484 | D.setRedeclaration(CheckVariableDeclaration(NewVD, Previous)); | ||||||
7485 | } else { | ||||||
7486 | // If this is an explicit specialization of a static data member, check it. | ||||||
7487 | if (IsMemberSpecialization && !NewVD->isInvalidDecl() && | ||||||
7488 | CheckMemberSpecialization(NewVD, Previous)) | ||||||
7489 | NewVD->setInvalidDecl(); | ||||||
7490 | |||||||
7491 | // Merge the decl with the existing one if appropriate. | ||||||
7492 | if (!Previous.empty()) { | ||||||
7493 | if (Previous.isSingleResult() && | ||||||
7494 | isa<FieldDecl>(Previous.getFoundDecl()) && | ||||||
7495 | D.getCXXScopeSpec().isSet()) { | ||||||
7496 | // The user tried to define a non-static data member | ||||||
7497 | // out-of-line (C++ [dcl.meaning]p1). | ||||||
7498 | Diag(NewVD->getLocation(), diag::err_nonstatic_member_out_of_line) | ||||||
7499 | << D.getCXXScopeSpec().getRange(); | ||||||
7500 | Previous.clear(); | ||||||
7501 | NewVD->setInvalidDecl(); | ||||||
7502 | } | ||||||
7503 | } else if (D.getCXXScopeSpec().isSet()) { | ||||||
7504 | // No previous declaration in the qualifying scope. | ||||||
7505 | Diag(D.getIdentifierLoc(), diag::err_no_member) | ||||||
7506 | << Name << computeDeclContext(D.getCXXScopeSpec(), true) | ||||||
7507 | << D.getCXXScopeSpec().getRange(); | ||||||
7508 | NewVD->setInvalidDecl(); | ||||||
7509 | } | ||||||
7510 | |||||||
7511 | if (!IsVariableTemplateSpecialization) | ||||||
7512 | D.setRedeclaration(CheckVariableDeclaration(NewVD, Previous)); | ||||||
7513 | |||||||
7514 | if (NewTemplate) { | ||||||
7515 | VarTemplateDecl *PrevVarTemplate = | ||||||
7516 | NewVD->getPreviousDecl() | ||||||
7517 | ? NewVD->getPreviousDecl()->getDescribedVarTemplate() | ||||||
7518 | : nullptr; | ||||||
7519 | |||||||
7520 | // Check the template parameter list of this declaration, possibly | ||||||
7521 | // merging in the template parameter list from the previous variable | ||||||
7522 | // template declaration. | ||||||
7523 | if (CheckTemplateParameterList( | ||||||
7524 | TemplateParams, | ||||||
7525 | PrevVarTemplate ? PrevVarTemplate->getTemplateParameters() | ||||||
7526 | : nullptr, | ||||||
7527 | (D.getCXXScopeSpec().isSet() && DC && DC->isRecord() && | ||||||
7528 | DC->isDependentContext()) | ||||||
7529 | ? TPC_ClassTemplateMember | ||||||
7530 | : TPC_VarTemplate)) | ||||||
7531 | NewVD->setInvalidDecl(); | ||||||
7532 | |||||||
7533 | // If we are providing an explicit specialization of a static variable | ||||||
7534 | // template, make a note of that. | ||||||
7535 | if (PrevVarTemplate && | ||||||
7536 | PrevVarTemplate->getInstantiatedFromMemberTemplate()) | ||||||
7537 | PrevVarTemplate->setMemberSpecialization(); | ||||||
7538 | } | ||||||
7539 | } | ||||||
7540 | |||||||
7541 | // Diagnose shadowed variables iff this isn't a redeclaration. | ||||||
7542 | if (ShadowedDecl && !D.isRedeclaration()) | ||||||
7543 | CheckShadow(NewVD, ShadowedDecl, Previous); | ||||||
7544 | |||||||
7545 | ProcessPragmaWeak(S, NewVD); | ||||||
7546 | |||||||
7547 | // If this is the first declaration of an extern C variable, update | ||||||
7548 | // the map of such variables. | ||||||
7549 | if (NewVD->isFirstDecl() && !NewVD->isInvalidDecl() && | ||||||
7550 | isIncompleteDeclExternC(*this, NewVD)) | ||||||
7551 | RegisterLocallyScopedExternCDecl(NewVD, S); | ||||||
7552 | |||||||
7553 | if (getLangOpts().CPlusPlus && NewVD->isStaticLocal()) { | ||||||
7554 | MangleNumberingContext *MCtx; | ||||||
7555 | Decl *ManglingContextDecl; | ||||||
7556 | std::tie(MCtx, ManglingContextDecl) = | ||||||
7557 | getCurrentMangleNumberContext(NewVD->getDeclContext()); | ||||||
7558 | if (MCtx) { | ||||||
7559 | Context.setManglingNumber( | ||||||
7560 | NewVD, MCtx->getManglingNumber( | ||||||
7561 | NewVD, getMSManglingNumber(getLangOpts(), S))); | ||||||
7562 | Context.setStaticLocalNumber(NewVD, MCtx->getStaticLocalNumber(NewVD)); | ||||||
7563 | } | ||||||
7564 | } | ||||||
7565 | |||||||
7566 | // Special handling of variable named 'main'. | ||||||
7567 | if (Name.getAsIdentifierInfo() && Name.getAsIdentifierInfo()->isStr("main") && | ||||||
7568 | NewVD->getDeclContext()->getRedeclContext()->isTranslationUnit() && | ||||||
7569 | !getLangOpts().Freestanding && !NewVD->getDescribedVarTemplate()) { | ||||||
7570 | |||||||
7571 | // C++ [basic.start.main]p3 | ||||||
7572 | // A program that declares a variable main at global scope is ill-formed. | ||||||
7573 | if (getLangOpts().CPlusPlus) | ||||||
7574 | Diag(D.getBeginLoc(), diag::err_main_global_variable); | ||||||
7575 | |||||||
7576 | // In C, and external-linkage variable named main results in undefined | ||||||
7577 | // behavior. | ||||||
7578 | else if (NewVD->hasExternalFormalLinkage()) | ||||||
7579 | Diag(D.getBeginLoc(), diag::warn_main_redefined); | ||||||
7580 | } | ||||||
7581 | |||||||
7582 | if (D.isRedeclaration() && !Previous.empty()) { | ||||||
7583 | NamedDecl *Prev = Previous.getRepresentativeDecl(); | ||||||
7584 | checkDLLAttributeRedeclaration(*this, Prev, NewVD, IsMemberSpecialization, | ||||||
7585 | D.isFunctionDefinition()); | ||||||
7586 | } | ||||||
7587 | |||||||
7588 | if (NewTemplate) { | ||||||
7589 | if (NewVD->isInvalidDecl()) | ||||||
7590 | NewTemplate->setInvalidDecl(); | ||||||
7591 | ActOnDocumentableDecl(NewTemplate); | ||||||
7592 | return NewTemplate; | ||||||
7593 | } | ||||||
7594 | |||||||
7595 | if (IsMemberSpecialization && !NewVD->isInvalidDecl()) | ||||||
7596 | CompleteMemberSpecialization(NewVD, Previous); | ||||||
7597 | |||||||
7598 | return NewVD; | ||||||
7599 | } | ||||||
7600 | |||||||
7601 | /// Enum describing the %select options in diag::warn_decl_shadow. | ||||||
7602 | enum ShadowedDeclKind { | ||||||
7603 | SDK_Local, | ||||||
7604 | SDK_Global, | ||||||
7605 | SDK_StaticMember, | ||||||
7606 | SDK_Field, | ||||||
7607 | SDK_Typedef, | ||||||
7608 | SDK_Using, | ||||||
7609 | SDK_StructuredBinding | ||||||
7610 | }; | ||||||
7611 | |||||||
7612 | /// Determine what kind of declaration we're shadowing. | ||||||
7613 | static ShadowedDeclKind computeShadowedDeclKind(const NamedDecl *ShadowedDecl, | ||||||
7614 | const DeclContext *OldDC) { | ||||||
7615 | if (isa<TypeAliasDecl>(ShadowedDecl)) | ||||||
7616 | return SDK_Using; | ||||||
7617 | else if (isa<TypedefDecl>(ShadowedDecl)) | ||||||
7618 | return SDK_Typedef; | ||||||
7619 | else if (isa<BindingDecl>(ShadowedDecl)) | ||||||
7620 | return SDK_StructuredBinding; | ||||||
7621 | else if (isa<RecordDecl>(OldDC)) | ||||||
7622 | return isa<FieldDecl>(ShadowedDecl) ? SDK_Field : SDK_StaticMember; | ||||||
7623 | |||||||
7624 | return OldDC->isFileContext() ? SDK_Global : SDK_Local; | ||||||
7625 | } | ||||||
7626 | |||||||
7627 | /// Return the location of the capture if the given lambda captures the given | ||||||
7628 | /// variable \p VD, or an invalid source location otherwise. | ||||||
7629 | static SourceLocation getCaptureLocation(const LambdaScopeInfo *LSI, | ||||||
7630 | const VarDecl *VD) { | ||||||
7631 | for (const Capture &Capture : LSI->Captures) { | ||||||
7632 | if (Capture.isVariableCapture() && Capture.getVariable() == VD) | ||||||
7633 | return Capture.getLocation(); | ||||||
7634 | } | ||||||
7635 | return SourceLocation(); | ||||||
7636 | } | ||||||
7637 | |||||||
7638 | static bool shouldWarnIfShadowedDecl(const DiagnosticsEngine &Diags, | ||||||
7639 | const LookupResult &R) { | ||||||
7640 | // Only diagnose if we're shadowing an unambiguous field or variable. | ||||||
7641 | if (R.getResultKind() != LookupResult::Found) | ||||||
7642 | return false; | ||||||
7643 | |||||||
7644 | // Return false if warning is ignored. | ||||||
7645 | return !Diags.isIgnored(diag::warn_decl_shadow, R.getNameLoc()); | ||||||
7646 | } | ||||||
7647 | |||||||
7648 | /// Return the declaration shadowed by the given variable \p D, or null | ||||||
7649 | /// if it doesn't shadow any declaration or shadowing warnings are disabled. | ||||||
7650 | NamedDecl *Sema::getShadowedDeclaration(const VarDecl *D, | ||||||
7651 | const LookupResult &R) { | ||||||
7652 | if (!shouldWarnIfShadowedDecl(Diags, R)) | ||||||
7653 | return nullptr; | ||||||
7654 | |||||||
7655 | // Don't diagnose declarations at file scope. | ||||||
7656 | if (D->hasGlobalStorage()) | ||||||
7657 | return nullptr; | ||||||
7658 | |||||||
7659 | NamedDecl *ShadowedDecl = R.getFoundDecl(); | ||||||
7660 | return isa<VarDecl, FieldDecl, BindingDecl>(ShadowedDecl) ? ShadowedDecl | ||||||
7661 | : nullptr; | ||||||
7662 | } | ||||||
7663 | |||||||
7664 | /// Return the declaration shadowed by the given typedef \p D, or null | ||||||
7665 | /// if it doesn't shadow any declaration or shadowing warnings are disabled. | ||||||
7666 | NamedDecl *Sema::getShadowedDeclaration(const TypedefNameDecl *D, | ||||||
7667 | const LookupResult &R) { | ||||||
7668 | // Don't warn if typedef declaration is part of a class | ||||||
7669 | if (D->getDeclContext()->isRecord()) | ||||||
7670 | return nullptr; | ||||||
7671 | |||||||
7672 | if (!shouldWarnIfShadowedDecl(Diags, R)) | ||||||
7673 | return nullptr; | ||||||
7674 | |||||||
7675 | NamedDecl *ShadowedDecl = R.getFoundDecl(); | ||||||
7676 | return isa<TypedefNameDecl>(ShadowedDecl) ? ShadowedDecl : nullptr; | ||||||
7677 | } | ||||||
7678 | |||||||
7679 | /// Return the declaration shadowed by the given variable \p D, or null | ||||||
7680 | /// if it doesn't shadow any declaration or shadowing warnings are disabled. | ||||||
7681 | NamedDecl *Sema::getShadowedDeclaration(const BindingDecl *D, | ||||||
7682 | const LookupResult &R) { | ||||||
7683 | if (!shouldWarnIfShadowedDecl(Diags, R)) | ||||||
7684 | return nullptr; | ||||||
7685 | |||||||
7686 | NamedDecl *ShadowedDecl = R.getFoundDecl(); | ||||||
7687 | return isa<VarDecl, FieldDecl, BindingDecl>(ShadowedDecl) ? ShadowedDecl | ||||||
7688 | : nullptr; | ||||||
7689 | } | ||||||
7690 | |||||||
7691 | /// Diagnose variable or built-in function shadowing. Implements | ||||||
7692 | /// -Wshadow. | ||||||
7693 | /// | ||||||
7694 | /// This method is called whenever a VarDecl is added to a "useful" | ||||||
7695 | /// scope. | ||||||
7696 | /// | ||||||
7697 | /// \param ShadowedDecl the declaration that is shadowed by the given variable | ||||||
7698 | /// \param R the lookup of the name | ||||||
7699 | /// | ||||||
7700 | void Sema::CheckShadow(NamedDecl *D, NamedDecl *ShadowedDecl, | ||||||
7701 | const LookupResult &R) { | ||||||
7702 | DeclContext *NewDC = D->getDeclContext(); | ||||||
7703 | |||||||
7704 | if (FieldDecl *FD = dyn_cast<FieldDecl>(ShadowedDecl)) { | ||||||
7705 | // Fields are not shadowed by variables in C++ static methods. | ||||||
7706 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewDC)) | ||||||
7707 | if (MD->isStatic()) | ||||||
7708 | return; | ||||||
7709 | |||||||
7710 | // Fields shadowed by constructor parameters are a special case. Usually | ||||||
7711 | // the constructor initializes the field with the parameter. | ||||||
7712 | if (isa<CXXConstructorDecl>(NewDC)) | ||||||
7713 | if (const auto PVD = dyn_cast<ParmVarDecl>(D)) { | ||||||
7714 | // Remember that this was shadowed so we can either warn about its | ||||||
7715 | // modification or its existence depending on warning settings. | ||||||
7716 | ShadowingDecls.insert({PVD->getCanonicalDecl(), FD}); | ||||||
7717 | return; | ||||||
7718 | } | ||||||
7719 | } | ||||||
7720 | |||||||
7721 | if (VarDecl *shadowedVar = dyn_cast<VarDecl>(ShadowedDecl)) | ||||||
7722 | if (shadowedVar->isExternC()) { | ||||||
7723 | // For shadowing external vars, make sure that we point to the global | ||||||
7724 | // declaration, not a locally scoped extern declaration. | ||||||
7725 | for (auto I : shadowedVar->redecls()) | ||||||
7726 | if (I->isFileVarDecl()) { | ||||||
7727 | ShadowedDecl = I; | ||||||
7728 | break; | ||||||
7729 | } | ||||||
7730 | } | ||||||
7731 | |||||||
7732 | DeclContext *OldDC = ShadowedDecl->getDeclContext()->getRedeclContext(); | ||||||
7733 | |||||||
7734 | unsigned WarningDiag = diag::warn_decl_shadow; | ||||||
7735 | SourceLocation CaptureLoc; | ||||||
7736 | if (isa<VarDecl>(D) && isa<VarDecl>(ShadowedDecl) && NewDC && | ||||||
7737 | isa<CXXMethodDecl>(NewDC)) { | ||||||
7738 | if (const auto *RD = dyn_cast<CXXRecordDecl>(NewDC->getParent())) { | ||||||
7739 | if (RD->isLambda() && OldDC->Encloses(NewDC->getLexicalParent())) { | ||||||
7740 | if (RD->getLambdaCaptureDefault() == LCD_None) { | ||||||
7741 | // Try to avoid warnings for lambdas with an explicit capture list. | ||||||
7742 | const auto *LSI = cast<LambdaScopeInfo>(getCurFunction()); | ||||||
7743 | // Warn only when the lambda captures the shadowed decl explicitly. | ||||||
7744 | CaptureLoc = getCaptureLocation(LSI, cast<VarDecl>(ShadowedDecl)); | ||||||
7745 | if (CaptureLoc.isInvalid()) | ||||||
7746 | WarningDiag = diag::warn_decl_shadow_uncaptured_local; | ||||||
7747 | } else { | ||||||
7748 | // Remember that this was shadowed so we can avoid the warning if the | ||||||
7749 | // shadowed decl isn't captured and the warning settings allow it. | ||||||
7750 | cast<LambdaScopeInfo>(getCurFunction()) | ||||||
7751 | ->ShadowingDecls.push_back( | ||||||
7752 | {cast<VarDecl>(D), cast<VarDecl>(ShadowedDecl)}); | ||||||
7753 | return; | ||||||
7754 | } | ||||||
7755 | } | ||||||
7756 | |||||||
7757 | if (cast<VarDecl>(ShadowedDecl)->hasLocalStorage()) { | ||||||
7758 | // A variable can't shadow a local variable in an enclosing scope, if | ||||||
7759 | // they are separated by a non-capturing declaration context. | ||||||
7760 | for (DeclContext *ParentDC = NewDC; | ||||||
7761 | ParentDC && !ParentDC->Equals(OldDC); | ||||||
7762 | ParentDC = getLambdaAwareParentOfDeclContext(ParentDC)) { | ||||||
7763 | // Only block literals, captured statements, and lambda expressions | ||||||
7764 | // can capture; other scopes don't. | ||||||
7765 | if (!isa<BlockDecl>(ParentDC) && !isa<CapturedDecl>(ParentDC) && | ||||||
7766 | !isLambdaCallOperator(ParentDC)) { | ||||||
7767 | return; | ||||||
7768 | } | ||||||
7769 | } | ||||||
7770 | } | ||||||
7771 | } | ||||||
7772 | } | ||||||
7773 | |||||||
7774 | // Only warn about certain kinds of shadowing for class members. | ||||||
7775 | if (NewDC && NewDC->isRecord()) { | ||||||
7776 | // In particular, don't warn about shadowing non-class members. | ||||||
7777 | if (!OldDC->isRecord()) | ||||||
7778 | return; | ||||||
7779 | |||||||
7780 | // TODO: should we warn about static data members shadowing | ||||||
7781 | // static data members from base classes? | ||||||
7782 | |||||||
7783 | // TODO: don't diagnose for inaccessible shadowed members. | ||||||
7784 | // This is hard to do perfectly because we might friend the | ||||||
7785 | // shadowing context, but that's just a false negative. | ||||||
7786 | } | ||||||
7787 | |||||||
7788 | |||||||
7789 | DeclarationName Name = R.getLookupName(); | ||||||
7790 | |||||||
7791 | // Emit warning and note. | ||||||
7792 | if (getSourceManager().isInSystemMacro(R.getNameLoc())) | ||||||
7793 | return; | ||||||
7794 | ShadowedDeclKind Kind = computeShadowedDeclKind(ShadowedDecl, OldDC); | ||||||
7795 | Diag(R.getNameLoc(), WarningDiag) << Name << Kind << OldDC; | ||||||
7796 | if (!CaptureLoc.isInvalid()) | ||||||
7797 | Diag(CaptureLoc, diag::note_var_explicitly_captured_here) | ||||||
7798 | << Name << /*explicitly*/ 1; | ||||||
7799 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); | ||||||
7800 | } | ||||||
7801 | |||||||
7802 | /// Diagnose shadowing for variables shadowed in the lambda record \p LambdaRD | ||||||
7803 | /// when these variables are captured by the lambda. | ||||||
7804 | void Sema::DiagnoseShadowingLambdaDecls(const LambdaScopeInfo *LSI) { | ||||||
7805 | for (const auto &Shadow : LSI->ShadowingDecls) { | ||||||
7806 | const VarDecl *ShadowedDecl = Shadow.ShadowedDecl; | ||||||
7807 | // Try to avoid the warning when the shadowed decl isn't captured. | ||||||
7808 | SourceLocation CaptureLoc = getCaptureLocation(LSI, ShadowedDecl); | ||||||
7809 | const DeclContext *OldDC = ShadowedDecl->getDeclContext(); | ||||||
7810 | Diag(Shadow.VD->getLocation(), CaptureLoc.isInvalid() | ||||||
7811 | ? diag::warn_decl_shadow_uncaptured_local | ||||||
7812 | : diag::warn_decl_shadow) | ||||||
7813 | << Shadow.VD->getDeclName() | ||||||
7814 | << computeShadowedDeclKind(ShadowedDecl, OldDC) << OldDC; | ||||||
7815 | if (!CaptureLoc.isInvalid()) | ||||||
7816 | Diag(CaptureLoc, diag::note_var_explicitly_captured_here) | ||||||
7817 | << Shadow.VD->getDeclName() << /*explicitly*/ 0; | ||||||
7818 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); | ||||||
7819 | } | ||||||
7820 | } | ||||||
7821 | |||||||
7822 | /// Check -Wshadow without the advantage of a previous lookup. | ||||||
7823 | void Sema::CheckShadow(Scope *S, VarDecl *D) { | ||||||
7824 | if (Diags.isIgnored(diag::warn_decl_shadow, D->getLocation())) | ||||||
7825 | return; | ||||||
7826 | |||||||
7827 | LookupResult R(*this, D->getDeclName(), D->getLocation(), | ||||||
7828 | Sema::LookupOrdinaryName, Sema::ForVisibleRedeclaration); | ||||||
7829 | LookupName(R, S); | ||||||
7830 | if (NamedDecl *ShadowedDecl = getShadowedDeclaration(D, R)) | ||||||
7831 | CheckShadow(D, ShadowedDecl, R); | ||||||
7832 | } | ||||||
7833 | |||||||
7834 | /// Check if 'E', which is an expression that is about to be modified, refers | ||||||
7835 | /// to a constructor parameter that shadows a field. | ||||||
7836 | void Sema::CheckShadowingDeclModification(Expr *E, SourceLocation Loc) { | ||||||
7837 | // Quickly ignore expressions that can't be shadowing ctor parameters. | ||||||
7838 | if (!getLangOpts().CPlusPlus || ShadowingDecls.empty()) | ||||||
7839 | return; | ||||||
7840 | E = E->IgnoreParenImpCasts(); | ||||||
7841 | auto *DRE = dyn_cast<DeclRefExpr>(E); | ||||||
7842 | if (!DRE) | ||||||
7843 | return; | ||||||
7844 | const NamedDecl *D = cast<NamedDecl>(DRE->getDecl()->getCanonicalDecl()); | ||||||
7845 | auto I = ShadowingDecls.find(D); | ||||||
7846 | if (I == ShadowingDecls.end()) | ||||||
7847 | return; | ||||||
7848 | const NamedDecl *ShadowedDecl = I->second; | ||||||
7849 | const DeclContext *OldDC = ShadowedDecl->getDeclContext(); | ||||||
7850 | Diag(Loc, diag::warn_modifying_shadowing_decl) << D << OldDC; | ||||||
7851 | Diag(D->getLocation(), diag::note_var_declared_here) << D; | ||||||
7852 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); | ||||||
7853 | |||||||
7854 | // Avoid issuing multiple warnings about the same decl. | ||||||
7855 | ShadowingDecls.erase(I); | ||||||
7856 | } | ||||||
7857 | |||||||
7858 | /// Check for conflict between this global or extern "C" declaration and | ||||||
7859 | /// previous global or extern "C" declarations. This is only used in C++. | ||||||
7860 | template<typename T> | ||||||
7861 | static bool checkGlobalOrExternCConflict( | ||||||
7862 | Sema &S, const T *ND, bool IsGlobal, LookupResult &Previous) { | ||||||
7863 | assert(S.getLangOpts().CPlusPlus && "only C++ has extern \"C\"")(static_cast <bool> (S.getLangOpts().CPlusPlus && "only C++ has extern \"C\"") ? void (0) : __assert_fail ("S.getLangOpts().CPlusPlus && \"only C++ has extern \\\"C\\\"\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 7863, __extension__ __PRETTY_FUNCTION__)); | ||||||
7864 | NamedDecl *Prev = S.findLocallyScopedExternCDecl(ND->getDeclName()); | ||||||
7865 | |||||||
7866 | if (!Prev && IsGlobal && !isIncompleteDeclExternC(S, ND)) { | ||||||
7867 | // The common case: this global doesn't conflict with any extern "C" | ||||||
7868 | // declaration. | ||||||
7869 | return false; | ||||||
7870 | } | ||||||
7871 | |||||||
7872 | if (Prev) { | ||||||
7873 | if (!IsGlobal || isIncompleteDeclExternC(S, ND)) { | ||||||
7874 | // Both the old and new declarations have C language linkage. This is a | ||||||
7875 | // redeclaration. | ||||||
7876 | Previous.clear(); | ||||||
7877 | Previous.addDecl(Prev); | ||||||
7878 | return true; | ||||||
7879 | } | ||||||
7880 | |||||||
7881 | // This is a global, non-extern "C" declaration, and there is a previous | ||||||
7882 | // non-global extern "C" declaration. Diagnose if this is a variable | ||||||
7883 | // declaration. | ||||||
7884 | if (!isa<VarDecl>(ND)) | ||||||
7885 | return false; | ||||||
7886 | } else { | ||||||
7887 | // The declaration is extern "C". Check for any declaration in the | ||||||
7888 | // translation unit which might conflict. | ||||||
7889 | if (IsGlobal) { | ||||||
7890 | // We have already performed the lookup into the translation unit. | ||||||
7891 | IsGlobal = false; | ||||||
7892 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | ||||||
7893 | I != E; ++I) { | ||||||
7894 | if (isa<VarDecl>(*I)) { | ||||||
7895 | Prev = *I; | ||||||
7896 | break; | ||||||
7897 | } | ||||||
7898 | } | ||||||
7899 | } else { | ||||||
7900 | DeclContext::lookup_result R = | ||||||
7901 | S.Context.getTranslationUnitDecl()->lookup(ND->getDeclName()); | ||||||
7902 | for (DeclContext::lookup_result::iterator I = R.begin(), E = R.end(); | ||||||
7903 | I != E; ++I) { | ||||||
7904 | if (isa<VarDecl>(*I)) { | ||||||
7905 | Prev = *I; | ||||||
7906 | break; | ||||||
7907 | } | ||||||
7908 | // FIXME: If we have any other entity with this name in global scope, | ||||||
7909 | // the declaration is ill-formed, but that is a defect: it breaks the | ||||||
7910 | // 'stat' hack, for instance. Only variables can have mangled name | ||||||
7911 | // clashes with extern "C" declarations, so only they deserve a | ||||||
7912 | // diagnostic. | ||||||
7913 | } | ||||||
7914 | } | ||||||
7915 | |||||||
7916 | if (!Prev) | ||||||
7917 | return false; | ||||||
7918 | } | ||||||
7919 | |||||||
7920 | // Use the first declaration's location to ensure we point at something which | ||||||
7921 | // is lexically inside an extern "C" linkage-spec. | ||||||
7922 | assert(Prev && "should have found a previous declaration to diagnose")(static_cast <bool> (Prev && "should have found a previous declaration to diagnose" ) ? void (0) : __assert_fail ("Prev && \"should have found a previous declaration to diagnose\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 7922, __extension__ __PRETTY_FUNCTION__)); | ||||||
7923 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Prev)) | ||||||
7924 | Prev = FD->getFirstDecl(); | ||||||
7925 | else | ||||||
7926 | Prev = cast<VarDecl>(Prev)->getFirstDecl(); | ||||||
7927 | |||||||
7928 | S.Diag(ND->getLocation(), diag::err_extern_c_global_conflict) | ||||||
7929 | << IsGlobal << ND; | ||||||
7930 | S.Diag(Prev->getLocation(), diag::note_extern_c_global_conflict) | ||||||
7931 | << IsGlobal; | ||||||
7932 | return false; | ||||||
7933 | } | ||||||
7934 | |||||||
7935 | /// Apply special rules for handling extern "C" declarations. Returns \c true | ||||||
7936 | /// if we have found that this is a redeclaration of some prior entity. | ||||||
7937 | /// | ||||||
7938 | /// Per C++ [dcl.link]p6: | ||||||
7939 | /// Two declarations [for a function or variable] with C language linkage | ||||||
7940 | /// with the same name that appear in different scopes refer to the same | ||||||
7941 | /// [entity]. An entity with C language linkage shall not be declared with | ||||||
7942 | /// the same name as an entity in global scope. | ||||||
7943 | template<typename T> | ||||||
7944 | static bool checkForConflictWithNonVisibleExternC(Sema &S, const T *ND, | ||||||
7945 | LookupResult &Previous) { | ||||||
7946 | if (!S.getLangOpts().CPlusPlus) { | ||||||
7947 | // In C, when declaring a global variable, look for a corresponding 'extern' | ||||||
7948 | // variable declared in function scope. We don't need this in C++, because | ||||||
7949 | // we find local extern decls in the surrounding file-scope DeclContext. | ||||||
7950 | if (ND->getDeclContext()->getRedeclContext()->isTranslationUnit()) { | ||||||
7951 | if (NamedDecl *Prev = S.findLocallyScopedExternCDecl(ND->getDeclName())) { | ||||||
7952 | Previous.clear(); | ||||||
7953 | Previous.addDecl(Prev); | ||||||
7954 | return true; | ||||||
7955 | } | ||||||
7956 | } | ||||||
7957 | return false; | ||||||
7958 | } | ||||||
7959 | |||||||
7960 | // A declaration in the translation unit can conflict with an extern "C" | ||||||
7961 | // declaration. | ||||||
7962 | if (ND->getDeclContext()->getRedeclContext()->isTranslationUnit()) | ||||||
7963 | return checkGlobalOrExternCConflict(S, ND, /*IsGlobal*/true, Previous); | ||||||
7964 | |||||||
7965 | // An extern "C" declaration can conflict with a declaration in the | ||||||
7966 | // translation unit or can be a redeclaration of an extern "C" declaration | ||||||
7967 | // in another scope. | ||||||
7968 | if (isIncompleteDeclExternC(S,ND)) | ||||||
7969 | return checkGlobalOrExternCConflict(S, ND, /*IsGlobal*/false, Previous); | ||||||
7970 | |||||||
7971 | // Neither global nor extern "C": nothing to do. | ||||||
7972 | return false; | ||||||
7973 | } | ||||||
7974 | |||||||
7975 | void Sema::CheckVariableDeclarationType(VarDecl *NewVD) { | ||||||
7976 | // If the decl is already known invalid, don't check it. | ||||||
7977 | if (NewVD->isInvalidDecl()) | ||||||
7978 | return; | ||||||
7979 | |||||||
7980 | QualType T = NewVD->getType(); | ||||||
7981 | |||||||
7982 | // Defer checking an 'auto' type until its initializer is attached. | ||||||
7983 | if (T->isUndeducedType()) | ||||||
7984 | return; | ||||||
7985 | |||||||
7986 | if (NewVD->hasAttrs()) | ||||||
7987 | CheckAlignasUnderalignment(NewVD); | ||||||
7988 | |||||||
7989 | if (T->isObjCObjectType()) { | ||||||
7990 | Diag(NewVD->getLocation(), diag::err_statically_allocated_object) | ||||||
7991 | << FixItHint::CreateInsertion(NewVD->getLocation(), "*"); | ||||||
7992 | T = Context.getObjCObjectPointerType(T); | ||||||
7993 | NewVD->setType(T); | ||||||
7994 | } | ||||||
7995 | |||||||
7996 | // Emit an error if an address space was applied to decl with local storage. | ||||||
7997 | // This includes arrays of objects with address space qualifiers, but not | ||||||
7998 | // automatic variables that point to other address spaces. | ||||||
7999 | // ISO/IEC TR 18037 S5.1.2 | ||||||
8000 | if (!getLangOpts().OpenCL && NewVD->hasLocalStorage() && | ||||||
8001 | T.getAddressSpace() != LangAS::Default) { | ||||||
8002 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl) << 0; | ||||||
8003 | NewVD->setInvalidDecl(); | ||||||
8004 | return; | ||||||
8005 | } | ||||||
8006 | |||||||
8007 | // OpenCL v1.2 s6.8 - The static qualifier is valid only in program | ||||||
8008 | // scope. | ||||||
8009 | if (getLangOpts().OpenCLVersion == 120 && | ||||||
8010 | !getOpenCLOptions().isAvailableOption("cl_clang_storage_class_specifiers", | ||||||
8011 | getLangOpts()) && | ||||||
8012 | NewVD->isStaticLocal()) { | ||||||
8013 | Diag(NewVD->getLocation(), diag::err_static_function_scope); | ||||||
8014 | NewVD->setInvalidDecl(); | ||||||
8015 | return; | ||||||
8016 | } | ||||||
8017 | |||||||
8018 | if (getLangOpts().OpenCL) { | ||||||
8019 | if (!diagnoseOpenCLTypes(*this, NewVD)) | ||||||
8020 | return; | ||||||
8021 | |||||||
8022 | // OpenCL v2.0 s6.12.5 - The __block storage type is not supported. | ||||||
8023 | if (NewVD->hasAttr<BlocksAttr>()) { | ||||||
8024 | Diag(NewVD->getLocation(), diag::err_opencl_block_storage_type); | ||||||
8025 | return; | ||||||
8026 | } | ||||||
8027 | |||||||
8028 | if (T->isBlockPointerType()) { | ||||||
8029 | // OpenCL v2.0 s6.12.5 - Any block declaration must be const qualified and | ||||||
8030 | // can't use 'extern' storage class. | ||||||
8031 | if (!T.isConstQualified()) { | ||||||
8032 | Diag(NewVD->getLocation(), diag::err_opencl_invalid_block_declaration) | ||||||
8033 | << 0 /*const*/; | ||||||
8034 | NewVD->setInvalidDecl(); | ||||||
8035 | return; | ||||||
8036 | } | ||||||
8037 | if (NewVD->hasExternalStorage()) { | ||||||
8038 | Diag(NewVD->getLocation(), diag::err_opencl_extern_block_declaration); | ||||||
8039 | NewVD->setInvalidDecl(); | ||||||
8040 | return; | ||||||
8041 | } | ||||||
8042 | } | ||||||
8043 | |||||||
8044 | // FIXME: Adding local AS in C++ for OpenCL might make sense. | ||||||
8045 | if (NewVD->isFileVarDecl() || NewVD->isStaticLocal() || | ||||||
8046 | NewVD->hasExternalStorage()) { | ||||||
8047 | if (!T->isSamplerT() && !T->isDependentType() && | ||||||
8048 | !(T.getAddressSpace() == LangAS::opencl_constant || | ||||||
8049 | (T.getAddressSpace() == LangAS::opencl_global && | ||||||
8050 | getOpenCLOptions().areProgramScopeVariablesSupported( | ||||||
8051 | getLangOpts())))) { | ||||||
8052 | int Scope = NewVD->isStaticLocal() | NewVD->hasExternalStorage() << 1; | ||||||
8053 | if (getOpenCLOptions().areProgramScopeVariablesSupported(getLangOpts())) | ||||||
8054 | Diag(NewVD->getLocation(), diag::err_opencl_global_invalid_addr_space) | ||||||
8055 | << Scope << "global or constant"; | ||||||
8056 | else | ||||||
8057 | Diag(NewVD->getLocation(), diag::err_opencl_global_invalid_addr_space) | ||||||
8058 | << Scope << "constant"; | ||||||
8059 | NewVD->setInvalidDecl(); | ||||||
8060 | return; | ||||||
8061 | } | ||||||
8062 | } else { | ||||||
8063 | if (T.getAddressSpace() == LangAS::opencl_global) { | ||||||
8064 | Diag(NewVD->getLocation(), diag::err_opencl_function_variable) | ||||||
8065 | << 1 /*is any function*/ << "global"; | ||||||
8066 | NewVD->setInvalidDecl(); | ||||||
8067 | return; | ||||||
8068 | } | ||||||
8069 | if (T.getAddressSpace() == LangAS::opencl_constant || | ||||||
8070 | T.getAddressSpace() == LangAS::opencl_local) { | ||||||
8071 | FunctionDecl *FD = getCurFunctionDecl(); | ||||||
8072 | // OpenCL v1.1 s6.5.2 and s6.5.3: no local or constant variables | ||||||
8073 | // in functions. | ||||||
8074 | if (FD && !FD->hasAttr<OpenCLKernelAttr>()) { | ||||||
8075 | if (T.getAddressSpace() == LangAS::opencl_constant) | ||||||
8076 | Diag(NewVD->getLocation(), diag::err_opencl_function_variable) | ||||||
8077 | << 0 /*non-kernel only*/ << "constant"; | ||||||
8078 | else | ||||||
8079 | Diag(NewVD->getLocation(), diag::err_opencl_function_variable) | ||||||
8080 | << 0 /*non-kernel only*/ << "local"; | ||||||
8081 | NewVD->setInvalidDecl(); | ||||||
8082 | return; | ||||||
8083 | } | ||||||
8084 | // OpenCL v2.0 s6.5.2 and s6.5.3: local and constant variables must be | ||||||
8085 | // in the outermost scope of a kernel function. | ||||||
8086 | if (FD && FD->hasAttr<OpenCLKernelAttr>()) { | ||||||
8087 | if (!getCurScope()->isFunctionScope()) { | ||||||
8088 | if (T.getAddressSpace() == LangAS::opencl_constant) | ||||||
8089 | Diag(NewVD->getLocation(), diag::err_opencl_addrspace_scope) | ||||||
8090 | << "constant"; | ||||||
8091 | else | ||||||
8092 | Diag(NewVD->getLocation(), diag::err_opencl_addrspace_scope) | ||||||
8093 | << "local"; | ||||||
8094 | NewVD->setInvalidDecl(); | ||||||
8095 | return; | ||||||
8096 | } | ||||||
8097 | } | ||||||
8098 | } else if (T.getAddressSpace() != LangAS::opencl_private && | ||||||
8099 | // If we are parsing a template we didn't deduce an addr | ||||||
8100 | // space yet. | ||||||
8101 | T.getAddressSpace() != LangAS::Default) { | ||||||
8102 | // Do not allow other address spaces on automatic variable. | ||||||
8103 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl) << 1; | ||||||
8104 | NewVD->setInvalidDecl(); | ||||||
8105 | return; | ||||||
8106 | } | ||||||
8107 | } | ||||||
8108 | } | ||||||
8109 | |||||||
8110 | if (NewVD->hasLocalStorage() && T.isObjCGCWeak() | ||||||
8111 | && !NewVD->hasAttr<BlocksAttr>()) { | ||||||
8112 | if (getLangOpts().getGC() != LangOptions::NonGC) | ||||||
8113 | Diag(NewVD->getLocation(), diag::warn_gc_attribute_weak_on_local); | ||||||
8114 | else { | ||||||
8115 | assert(!getLangOpts().ObjCAutoRefCount)(static_cast <bool> (!getLangOpts().ObjCAutoRefCount) ? void (0) : __assert_fail ("!getLangOpts().ObjCAutoRefCount", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8115, __extension__ __PRETTY_FUNCTION__)); | ||||||
8116 | Diag(NewVD->getLocation(), diag::warn_attribute_weak_on_local); | ||||||
8117 | } | ||||||
8118 | } | ||||||
8119 | |||||||
8120 | bool isVM = T->isVariablyModifiedType(); | ||||||
8121 | if (isVM || NewVD->hasAttr<CleanupAttr>() || | ||||||
8122 | NewVD->hasAttr<BlocksAttr>()) | ||||||
8123 | setFunctionHasBranchProtectedScope(); | ||||||
8124 | |||||||
8125 | if ((isVM && NewVD->hasLinkage()) || | ||||||
8126 | (T->isVariableArrayType() && NewVD->hasGlobalStorage())) { | ||||||
8127 | bool SizeIsNegative; | ||||||
8128 | llvm::APSInt Oversized; | ||||||
8129 | TypeSourceInfo *FixedTInfo = TryToFixInvalidVariablyModifiedTypeSourceInfo( | ||||||
8130 | NewVD->getTypeSourceInfo(), Context, SizeIsNegative, Oversized); | ||||||
8131 | QualType FixedT; | ||||||
8132 | if (FixedTInfo && T == NewVD->getTypeSourceInfo()->getType()) | ||||||
8133 | FixedT = FixedTInfo->getType(); | ||||||
8134 | else if (FixedTInfo) { | ||||||
8135 | // Type and type-as-written are canonically different. We need to fix up | ||||||
8136 | // both types separately. | ||||||
8137 | FixedT = TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative, | ||||||
8138 | Oversized); | ||||||
8139 | } | ||||||
8140 | if ((!FixedTInfo || FixedT.isNull()) && T->isVariableArrayType()) { | ||||||
8141 | const VariableArrayType *VAT = Context.getAsVariableArrayType(T); | ||||||
8142 | // FIXME: This won't give the correct result for | ||||||
8143 | // int a[10][n]; | ||||||
8144 | SourceRange SizeRange = VAT->getSizeExpr()->getSourceRange(); | ||||||
8145 | |||||||
8146 | if (NewVD->isFileVarDecl()) | ||||||
8147 | Diag(NewVD->getLocation(), diag::err_vla_decl_in_file_scope) | ||||||
8148 | << SizeRange; | ||||||
8149 | else if (NewVD->isStaticLocal()) | ||||||
8150 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_static_storage) | ||||||
8151 | << SizeRange; | ||||||
8152 | else | ||||||
8153 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_extern_linkage) | ||||||
8154 | << SizeRange; | ||||||
8155 | NewVD->setInvalidDecl(); | ||||||
8156 | return; | ||||||
8157 | } | ||||||
8158 | |||||||
8159 | if (!FixedTInfo) { | ||||||
8160 | if (NewVD->isFileVarDecl()) | ||||||
8161 | Diag(NewVD->getLocation(), diag::err_vm_decl_in_file_scope); | ||||||
8162 | else | ||||||
8163 | Diag(NewVD->getLocation(), diag::err_vm_decl_has_extern_linkage); | ||||||
8164 | NewVD->setInvalidDecl(); | ||||||
8165 | return; | ||||||
8166 | } | ||||||
8167 | |||||||
8168 | Diag(NewVD->getLocation(), diag::ext_vla_folded_to_constant); | ||||||
8169 | NewVD->setType(FixedT); | ||||||
8170 | NewVD->setTypeSourceInfo(FixedTInfo); | ||||||
8171 | } | ||||||
8172 | |||||||
8173 | if (T->isVoidType()) { | ||||||
8174 | // C++98 [dcl.stc]p5: The extern specifier can be applied only to the names | ||||||
8175 | // of objects and functions. | ||||||
8176 | if (NewVD->isThisDeclarationADefinition() || getLangOpts().CPlusPlus) { | ||||||
8177 | Diag(NewVD->getLocation(), diag::err_typecheck_decl_incomplete_type) | ||||||
8178 | << T; | ||||||
8179 | NewVD->setInvalidDecl(); | ||||||
8180 | return; | ||||||
8181 | } | ||||||
8182 | } | ||||||
8183 | |||||||
8184 | if (!NewVD->hasLocalStorage() && NewVD->hasAttr<BlocksAttr>()) { | ||||||
8185 | Diag(NewVD->getLocation(), diag::err_block_on_nonlocal); | ||||||
8186 | NewVD->setInvalidDecl(); | ||||||
8187 | return; | ||||||
8188 | } | ||||||
8189 | |||||||
8190 | if (!NewVD->hasLocalStorage() && T->isSizelessType()) { | ||||||
8191 | Diag(NewVD->getLocation(), diag::err_sizeless_nonlocal) << T; | ||||||
8192 | NewVD->setInvalidDecl(); | ||||||
8193 | return; | ||||||
8194 | } | ||||||
8195 | |||||||
8196 | if (isVM && NewVD->hasAttr<BlocksAttr>()) { | ||||||
8197 | Diag(NewVD->getLocation(), diag::err_block_on_vm); | ||||||
8198 | NewVD->setInvalidDecl(); | ||||||
8199 | return; | ||||||
8200 | } | ||||||
8201 | |||||||
8202 | if (NewVD->isConstexpr() && !T->isDependentType() && | ||||||
8203 | RequireLiteralType(NewVD->getLocation(), T, | ||||||
8204 | diag::err_constexpr_var_non_literal)) { | ||||||
8205 | NewVD->setInvalidDecl(); | ||||||
8206 | return; | ||||||
8207 | } | ||||||
8208 | |||||||
8209 | // PPC MMA non-pointer types are not allowed as non-local variable types. | ||||||
8210 | if (Context.getTargetInfo().getTriple().isPPC64() && | ||||||
8211 | !NewVD->isLocalVarDecl() && | ||||||
8212 | CheckPPCMMAType(T, NewVD->getLocation())) { | ||||||
8213 | NewVD->setInvalidDecl(); | ||||||
8214 | return; | ||||||
8215 | } | ||||||
8216 | } | ||||||
8217 | |||||||
8218 | /// Perform semantic checking on a newly-created variable | ||||||
8219 | /// declaration. | ||||||
8220 | /// | ||||||
8221 | /// This routine performs all of the type-checking required for a | ||||||
8222 | /// variable declaration once it has been built. It is used both to | ||||||
8223 | /// check variables after they have been parsed and their declarators | ||||||
8224 | /// have been translated into a declaration, and to check variables | ||||||
8225 | /// that have been instantiated from a template. | ||||||
8226 | /// | ||||||
8227 | /// Sets NewVD->isInvalidDecl() if an error was encountered. | ||||||
8228 | /// | ||||||
8229 | /// Returns true if the variable declaration is a redeclaration. | ||||||
8230 | bool Sema::CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous) { | ||||||
8231 | CheckVariableDeclarationType(NewVD); | ||||||
8232 | |||||||
8233 | // If the decl is already known invalid, don't check it. | ||||||
8234 | if (NewVD->isInvalidDecl()) | ||||||
8235 | return false; | ||||||
8236 | |||||||
8237 | // If we did not find anything by this name, look for a non-visible | ||||||
8238 | // extern "C" declaration with the same name. | ||||||
8239 | if (Previous.empty() && | ||||||
8240 | checkForConflictWithNonVisibleExternC(*this, NewVD, Previous)) | ||||||
8241 | Previous.setShadowed(); | ||||||
8242 | |||||||
8243 | if (!Previous.empty()) { | ||||||
8244 | MergeVarDecl(NewVD, Previous); | ||||||
8245 | return true; | ||||||
8246 | } | ||||||
8247 | return false; | ||||||
8248 | } | ||||||
8249 | |||||||
8250 | /// AddOverriddenMethods - See if a method overrides any in the base classes, | ||||||
8251 | /// and if so, check that it's a valid override and remember it. | ||||||
8252 | bool Sema::AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) { | ||||||
8253 | llvm::SmallPtrSet<const CXXMethodDecl*, 4> Overridden; | ||||||
8254 | |||||||
8255 | // Look for methods in base classes that this method might override. | ||||||
8256 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/false, | ||||||
8257 | /*DetectVirtual=*/false); | ||||||
8258 | auto VisitBase = [&] (const CXXBaseSpecifier *Specifier, CXXBasePath &Path) { | ||||||
8259 | CXXRecordDecl *BaseRecord = Specifier->getType()->getAsCXXRecordDecl(); | ||||||
8260 | DeclarationName Name = MD->getDeclName(); | ||||||
8261 | |||||||
8262 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { | ||||||
8263 | // We really want to find the base class destructor here. | ||||||
8264 | QualType T = Context.getTypeDeclType(BaseRecord); | ||||||
8265 | CanQualType CT = Context.getCanonicalType(T); | ||||||
8266 | Name = Context.DeclarationNames.getCXXDestructorName(CT); | ||||||
8267 | } | ||||||
8268 | |||||||
8269 | for (NamedDecl *BaseND : BaseRecord->lookup(Name)) { | ||||||
8270 | CXXMethodDecl *BaseMD = | ||||||
8271 | dyn_cast<CXXMethodDecl>(BaseND->getCanonicalDecl()); | ||||||
8272 | if (!BaseMD || !BaseMD->isVirtual() || | ||||||
8273 | IsOverload(MD, BaseMD, /*UseMemberUsingDeclRules=*/false, | ||||||
8274 | /*ConsiderCudaAttrs=*/true, | ||||||
8275 | // C++2a [class.virtual]p2 does not consider requires | ||||||
8276 | // clauses when overriding. | ||||||
8277 | /*ConsiderRequiresClauses=*/false)) | ||||||
8278 | continue; | ||||||
8279 | |||||||
8280 | if (Overridden.insert(BaseMD).second) { | ||||||
8281 | MD->addOverriddenMethod(BaseMD); | ||||||
8282 | CheckOverridingFunctionReturnType(MD, BaseMD); | ||||||
8283 | CheckOverridingFunctionAttributes(MD, BaseMD); | ||||||
8284 | CheckOverridingFunctionExceptionSpec(MD, BaseMD); | ||||||
8285 | CheckIfOverriddenFunctionIsMarkedFinal(MD, BaseMD); | ||||||
8286 | } | ||||||
8287 | |||||||
8288 | // A method can only override one function from each base class. We | ||||||
8289 | // don't track indirectly overridden methods from bases of bases. | ||||||
8290 | return true; | ||||||
8291 | } | ||||||
8292 | |||||||
8293 | return false; | ||||||
8294 | }; | ||||||
8295 | |||||||
8296 | DC->lookupInBases(VisitBase, Paths); | ||||||
8297 | return !Overridden.empty(); | ||||||
8298 | } | ||||||
8299 | |||||||
8300 | namespace { | ||||||
8301 | // Struct for holding all of the extra arguments needed by | ||||||
8302 | // DiagnoseInvalidRedeclaration to call Sema::ActOnFunctionDeclarator. | ||||||
8303 | struct ActOnFDArgs { | ||||||
8304 | Scope *S; | ||||||
8305 | Declarator &D; | ||||||
8306 | MultiTemplateParamsArg TemplateParamLists; | ||||||
8307 | bool AddToScope; | ||||||
8308 | }; | ||||||
8309 | } // end anonymous namespace | ||||||
8310 | |||||||
8311 | namespace { | ||||||
8312 | |||||||
8313 | // Callback to only accept typo corrections that have a non-zero edit distance. | ||||||
8314 | // Also only accept corrections that have the same parent decl. | ||||||
8315 | class DifferentNameValidatorCCC final : public CorrectionCandidateCallback { | ||||||
8316 | public: | ||||||
8317 | DifferentNameValidatorCCC(ASTContext &Context, FunctionDecl *TypoFD, | ||||||
8318 | CXXRecordDecl *Parent) | ||||||
8319 | : Context(Context), OriginalFD(TypoFD), | ||||||
8320 | ExpectedParent(Parent ? Parent->getCanonicalDecl() : nullptr) {} | ||||||
8321 | |||||||
8322 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||
8323 | if (candidate.getEditDistance() == 0) | ||||||
8324 | return false; | ||||||
8325 | |||||||
8326 | SmallVector<unsigned, 1> MismatchedParams; | ||||||
8327 | for (TypoCorrection::const_decl_iterator CDecl = candidate.begin(), | ||||||
8328 | CDeclEnd = candidate.end(); | ||||||
8329 | CDecl != CDeclEnd; ++CDecl) { | ||||||
8330 | FunctionDecl *FD = dyn_cast<FunctionDecl>(*CDecl); | ||||||
8331 | |||||||
8332 | if (FD && !FD->hasBody() && | ||||||
8333 | hasSimilarParameters(Context, FD, OriginalFD, MismatchedParams)) { | ||||||
8334 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||
8335 | CXXRecordDecl *Parent = MD->getParent(); | ||||||
8336 | if (Parent && Parent->getCanonicalDecl() == ExpectedParent) | ||||||
8337 | return true; | ||||||
8338 | } else if (!ExpectedParent) { | ||||||
8339 | return true; | ||||||
8340 | } | ||||||
8341 | } | ||||||
8342 | } | ||||||
8343 | |||||||
8344 | return false; | ||||||
8345 | } | ||||||
8346 | |||||||
8347 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
8348 | return std::make_unique<DifferentNameValidatorCCC>(*this); | ||||||
8349 | } | ||||||
8350 | |||||||
8351 | private: | ||||||
8352 | ASTContext &Context; | ||||||
8353 | FunctionDecl *OriginalFD; | ||||||
8354 | CXXRecordDecl *ExpectedParent; | ||||||
8355 | }; | ||||||
8356 | |||||||
8357 | } // end anonymous namespace | ||||||
8358 | |||||||
8359 | void Sema::MarkTypoCorrectedFunctionDefinition(const NamedDecl *F) { | ||||||
8360 | TypoCorrectedFunctionDefinitions.insert(F); | ||||||
8361 | } | ||||||
8362 | |||||||
8363 | /// Generate diagnostics for an invalid function redeclaration. | ||||||
8364 | /// | ||||||
8365 | /// This routine handles generating the diagnostic messages for an invalid | ||||||
8366 | /// function redeclaration, including finding possible similar declarations | ||||||
8367 | /// or performing typo correction if there are no previous declarations with | ||||||
8368 | /// the same name. | ||||||
8369 | /// | ||||||
8370 | /// Returns a NamedDecl iff typo correction was performed and substituting in | ||||||
8371 | /// the new declaration name does not cause new errors. | ||||||
8372 | static NamedDecl *DiagnoseInvalidRedeclaration( | ||||||
8373 | Sema &SemaRef, LookupResult &Previous, FunctionDecl *NewFD, | ||||||
8374 | ActOnFDArgs &ExtraArgs, bool IsLocalFriend, Scope *S) { | ||||||
8375 | DeclarationName Name = NewFD->getDeclName(); | ||||||
8376 | DeclContext *NewDC = NewFD->getDeclContext(); | ||||||
8377 | SmallVector<unsigned, 1> MismatchedParams; | ||||||
8378 | SmallVector<std::pair<FunctionDecl *, unsigned>, 1> NearMatches; | ||||||
8379 | TypoCorrection Correction; | ||||||
8380 | bool IsDefinition = ExtraArgs.D.isFunctionDefinition(); | ||||||
8381 | unsigned DiagMsg = | ||||||
8382 | IsLocalFriend ? diag::err_no_matching_local_friend : | ||||||
8383 | NewFD->getFriendObjectKind() ? diag::err_qualified_friend_no_match : | ||||||
8384 | diag::err_member_decl_does_not_match; | ||||||
8385 | LookupResult Prev(SemaRef, Name, NewFD->getLocation(), | ||||||
8386 | IsLocalFriend ? Sema::LookupLocalFriendName | ||||||
8387 | : Sema::LookupOrdinaryName, | ||||||
8388 | Sema::ForVisibleRedeclaration); | ||||||
8389 | |||||||
8390 | NewFD->setInvalidDecl(); | ||||||
8391 | if (IsLocalFriend) | ||||||
8392 | SemaRef.LookupName(Prev, S); | ||||||
8393 | else | ||||||
8394 | SemaRef.LookupQualifiedName(Prev, NewDC); | ||||||
8395 | assert(!Prev.isAmbiguous() &&(static_cast <bool> (!Prev.isAmbiguous() && "Cannot have an ambiguity in previous-declaration lookup" ) ? void (0) : __assert_fail ("!Prev.isAmbiguous() && \"Cannot have an ambiguity in previous-declaration lookup\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8396, __extension__ __PRETTY_FUNCTION__)) | ||||||
8396 | "Cannot have an ambiguity in previous-declaration lookup")(static_cast <bool> (!Prev.isAmbiguous() && "Cannot have an ambiguity in previous-declaration lookup" ) ? void (0) : __assert_fail ("!Prev.isAmbiguous() && \"Cannot have an ambiguity in previous-declaration lookup\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8396, __extension__ __PRETTY_FUNCTION__)); | ||||||
8397 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD); | ||||||
8398 | DifferentNameValidatorCCC CCC(SemaRef.Context, NewFD, | ||||||
8399 | MD ? MD->getParent() : nullptr); | ||||||
8400 | if (!Prev.empty()) { | ||||||
8401 | for (LookupResult::iterator Func = Prev.begin(), FuncEnd = Prev.end(); | ||||||
8402 | Func != FuncEnd; ++Func) { | ||||||
8403 | FunctionDecl *FD = dyn_cast<FunctionDecl>(*Func); | ||||||
8404 | if (FD && | ||||||
8405 | hasSimilarParameters(SemaRef.Context, FD, NewFD, MismatchedParams)) { | ||||||
8406 | // Add 1 to the index so that 0 can mean the mismatch didn't | ||||||
8407 | // involve a parameter | ||||||
8408 | unsigned ParamNum = | ||||||
8409 | MismatchedParams.empty() ? 0 : MismatchedParams.front() + 1; | ||||||
8410 | NearMatches.push_back(std::make_pair(FD, ParamNum)); | ||||||
8411 | } | ||||||
8412 | } | ||||||
8413 | // If the qualified name lookup yielded nothing, try typo correction | ||||||
8414 | } else if ((Correction = SemaRef.CorrectTypo( | ||||||
8415 | Prev.getLookupNameInfo(), Prev.getLookupKind(), S, | ||||||
8416 | &ExtraArgs.D.getCXXScopeSpec(), CCC, Sema::CTK_ErrorRecovery, | ||||||
8417 | IsLocalFriend ? nullptr : NewDC))) { | ||||||
8418 | // Set up everything for the call to ActOnFunctionDeclarator | ||||||
8419 | ExtraArgs.D.SetIdentifier(Correction.getCorrectionAsIdentifierInfo(), | ||||||
8420 | ExtraArgs.D.getIdentifierLoc()); | ||||||
8421 | Previous.clear(); | ||||||
8422 | Previous.setLookupName(Correction.getCorrection()); | ||||||
8423 | for (TypoCorrection::decl_iterator CDecl = Correction.begin(), | ||||||
8424 | CDeclEnd = Correction.end(); | ||||||
8425 | CDecl != CDeclEnd; ++CDecl) { | ||||||
8426 | FunctionDecl *FD = dyn_cast<FunctionDecl>(*CDecl); | ||||||
8427 | if (FD && !FD->hasBody() && | ||||||
8428 | hasSimilarParameters(SemaRef.Context, FD, NewFD, MismatchedParams)) { | ||||||
8429 | Previous.addDecl(FD); | ||||||
8430 | } | ||||||
8431 | } | ||||||
8432 | bool wasRedeclaration = ExtraArgs.D.isRedeclaration(); | ||||||
8433 | |||||||
8434 | NamedDecl *Result; | ||||||
8435 | // Retry building the function declaration with the new previous | ||||||
8436 | // declarations, and with errors suppressed. | ||||||
8437 | { | ||||||
8438 | // Trap errors. | ||||||
8439 | Sema::SFINAETrap Trap(SemaRef); | ||||||
8440 | |||||||
8441 | // TODO: Refactor ActOnFunctionDeclarator so that we can call only the | ||||||
8442 | // pieces need to verify the typo-corrected C++ declaration and hopefully | ||||||
8443 | // eliminate the need for the parameter pack ExtraArgs. | ||||||
8444 | Result = SemaRef.ActOnFunctionDeclarator( | ||||||
8445 | ExtraArgs.S, ExtraArgs.D, | ||||||
8446 | Correction.getCorrectionDecl()->getDeclContext(), | ||||||
8447 | NewFD->getTypeSourceInfo(), Previous, ExtraArgs.TemplateParamLists, | ||||||
8448 | ExtraArgs.AddToScope); | ||||||
8449 | |||||||
8450 | if (Trap.hasErrorOccurred()) | ||||||
8451 | Result = nullptr; | ||||||
8452 | } | ||||||
8453 | |||||||
8454 | if (Result) { | ||||||
8455 | // Determine which correction we picked. | ||||||
8456 | Decl *Canonical = Result->getCanonicalDecl(); | ||||||
8457 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | ||||||
8458 | I != E; ++I) | ||||||
8459 | if ((*I)->getCanonicalDecl() == Canonical) | ||||||
8460 | Correction.setCorrectionDecl(*I); | ||||||
8461 | |||||||
8462 | // Let Sema know about the correction. | ||||||
8463 | SemaRef.MarkTypoCorrectedFunctionDefinition(Result); | ||||||
8464 | SemaRef.diagnoseTypo( | ||||||
8465 | Correction, | ||||||
8466 | SemaRef.PDiag(IsLocalFriend | ||||||
8467 | ? diag::err_no_matching_local_friend_suggest | ||||||
8468 | : diag::err_member_decl_does_not_match_suggest) | ||||||
8469 | << Name << NewDC << IsDefinition); | ||||||
8470 | return Result; | ||||||
8471 | } | ||||||
8472 | |||||||
8473 | // Pretend the typo correction never occurred | ||||||
8474 | ExtraArgs.D.SetIdentifier(Name.getAsIdentifierInfo(), | ||||||
8475 | ExtraArgs.D.getIdentifierLoc()); | ||||||
8476 | ExtraArgs.D.setRedeclaration(wasRedeclaration); | ||||||
8477 | Previous.clear(); | ||||||
8478 | Previous.setLookupName(Name); | ||||||
8479 | } | ||||||
8480 | |||||||
8481 | SemaRef.Diag(NewFD->getLocation(), DiagMsg) | ||||||
8482 | << Name << NewDC << IsDefinition << NewFD->getLocation(); | ||||||
8483 | |||||||
8484 | bool NewFDisConst = false; | ||||||
8485 | if (CXXMethodDecl *NewMD = dyn_cast<CXXMethodDecl>(NewFD)) | ||||||
8486 | NewFDisConst = NewMD->isConst(); | ||||||
8487 | |||||||
8488 | for (SmallVectorImpl<std::pair<FunctionDecl *, unsigned> >::iterator | ||||||
8489 | NearMatch = NearMatches.begin(), NearMatchEnd = NearMatches.end(); | ||||||
8490 | NearMatch != NearMatchEnd; ++NearMatch) { | ||||||
8491 | FunctionDecl *FD = NearMatch->first; | ||||||
8492 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD); | ||||||
8493 | bool FDisConst = MD && MD->isConst(); | ||||||
8494 | bool IsMember = MD || !IsLocalFriend; | ||||||
8495 | |||||||
8496 | // FIXME: These notes are poorly worded for the local friend case. | ||||||
8497 | if (unsigned Idx = NearMatch->second) { | ||||||
8498 | ParmVarDecl *FDParam = FD->getParamDecl(Idx-1); | ||||||
8499 | SourceLocation Loc = FDParam->getTypeSpecStartLoc(); | ||||||
8500 | if (Loc.isInvalid()) Loc = FD->getLocation(); | ||||||
8501 | SemaRef.Diag(Loc, IsMember ? diag::note_member_def_close_param_match | ||||||
8502 | : diag::note_local_decl_close_param_match) | ||||||
8503 | << Idx << FDParam->getType() | ||||||
8504 | << NewFD->getParamDecl(Idx - 1)->getType(); | ||||||
8505 | } else if (FDisConst != NewFDisConst) { | ||||||
8506 | SemaRef.Diag(FD->getLocation(), diag::note_member_def_close_const_match) | ||||||
8507 | << NewFDisConst << FD->getSourceRange().getEnd(); | ||||||
8508 | } else | ||||||
8509 | SemaRef.Diag(FD->getLocation(), | ||||||
8510 | IsMember ? diag::note_member_def_close_match | ||||||
8511 | : diag::note_local_decl_close_match); | ||||||
8512 | } | ||||||
8513 | return nullptr; | ||||||
8514 | } | ||||||
8515 | |||||||
8516 | static StorageClass getFunctionStorageClass(Sema &SemaRef, Declarator &D) { | ||||||
8517 | switch (D.getDeclSpec().getStorageClassSpec()) { | ||||||
8518 | default: llvm_unreachable("Unknown storage class!")::llvm::llvm_unreachable_internal("Unknown storage class!", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8518); | ||||||
8519 | case DeclSpec::SCS_auto: | ||||||
8520 | case DeclSpec::SCS_register: | ||||||
8521 | case DeclSpec::SCS_mutable: | ||||||
8522 | SemaRef.Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
8523 | diag::err_typecheck_sclass_func); | ||||||
8524 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||
8525 | D.setInvalidType(); | ||||||
8526 | break; | ||||||
8527 | case DeclSpec::SCS_unspecified: break; | ||||||
8528 | case DeclSpec::SCS_extern: | ||||||
8529 | if (D.getDeclSpec().isExternInLinkageSpec()) | ||||||
8530 | return SC_None; | ||||||
8531 | return SC_Extern; | ||||||
8532 | case DeclSpec::SCS_static: { | ||||||
8533 | if (SemaRef.CurContext->getRedeclContext()->isFunctionOrMethod()) { | ||||||
8534 | // C99 6.7.1p5: | ||||||
8535 | // The declaration of an identifier for a function that has | ||||||
8536 | // block scope shall have no explicit storage-class specifier | ||||||
8537 | // other than extern | ||||||
8538 | // See also (C++ [dcl.stc]p4). | ||||||
8539 | SemaRef.Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
8540 | diag::err_static_block_func); | ||||||
8541 | break; | ||||||
8542 | } else | ||||||
8543 | return SC_Static; | ||||||
8544 | } | ||||||
8545 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; | ||||||
8546 | } | ||||||
8547 | |||||||
8548 | // No explicit storage class has already been returned | ||||||
8549 | return SC_None; | ||||||
8550 | } | ||||||
8551 | |||||||
8552 | static FunctionDecl *CreateNewFunctionDecl(Sema &SemaRef, Declarator &D, | ||||||
8553 | DeclContext *DC, QualType &R, | ||||||
8554 | TypeSourceInfo *TInfo, | ||||||
8555 | StorageClass SC, | ||||||
8556 | bool &IsVirtualOkay) { | ||||||
8557 | DeclarationNameInfo NameInfo = SemaRef.GetNameForDeclarator(D); | ||||||
8558 | DeclarationName Name = NameInfo.getName(); | ||||||
8559 | |||||||
8560 | FunctionDecl *NewFD = nullptr; | ||||||
8561 | bool isInline = D.getDeclSpec().isInlineSpecified(); | ||||||
8562 | |||||||
8563 | if (!SemaRef.getLangOpts().CPlusPlus) { | ||||||
8564 | // Determine whether the function was written with a | ||||||
8565 | // prototype. This true when: | ||||||
8566 | // - there is a prototype in the declarator, or | ||||||
8567 | // - the type R of the function is some kind of typedef or other non- | ||||||
8568 | // attributed reference to a type name (which eventually refers to a | ||||||
8569 | // function type). | ||||||
8570 | bool HasPrototype = | ||||||
8571 | (D.isFunctionDeclarator() && D.getFunctionTypeInfo().hasPrototype) || | ||||||
8572 | (!R->getAsAdjusted<FunctionType>() && R->isFunctionProtoType()); | ||||||
8573 | |||||||
8574 | NewFD = FunctionDecl::Create( | ||||||
8575 | SemaRef.Context, DC, D.getBeginLoc(), NameInfo, R, TInfo, SC, | ||||||
8576 | SemaRef.getCurFPFeatures().isFPConstrained(), isInline, HasPrototype, | ||||||
8577 | ConstexprSpecKind::Unspecified, | ||||||
8578 | /*TrailingRequiresClause=*/nullptr); | ||||||
8579 | if (D.isInvalidType()) | ||||||
8580 | NewFD->setInvalidDecl(); | ||||||
8581 | |||||||
8582 | return NewFD; | ||||||
8583 | } | ||||||
8584 | |||||||
8585 | ExplicitSpecifier ExplicitSpecifier = D.getDeclSpec().getExplicitSpecifier(); | ||||||
8586 | |||||||
8587 | ConstexprSpecKind ConstexprKind = D.getDeclSpec().getConstexprSpecifier(); | ||||||
8588 | if (ConstexprKind == ConstexprSpecKind::Constinit) { | ||||||
8589 | SemaRef.Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
8590 | diag::err_constexpr_wrong_decl_kind) | ||||||
8591 | << static_cast<int>(ConstexprKind); | ||||||
8592 | ConstexprKind = ConstexprSpecKind::Unspecified; | ||||||
8593 | D.getMutableDeclSpec().ClearConstexprSpec(); | ||||||
8594 | } | ||||||
8595 | Expr *TrailingRequiresClause = D.getTrailingRequiresClause(); | ||||||
8596 | |||||||
8597 | // Check that the return type is not an abstract class type. | ||||||
8598 | // For record types, this is done by the AbstractClassUsageDiagnoser once | ||||||
8599 | // the class has been completely parsed. | ||||||
8600 | if (!DC->isRecord() && | ||||||
8601 | SemaRef.RequireNonAbstractType( | ||||||
8602 | D.getIdentifierLoc(), R->castAs<FunctionType>()->getReturnType(), | ||||||
8603 | diag::err_abstract_type_in_decl, SemaRef.AbstractReturnType)) | ||||||
8604 | D.setInvalidType(); | ||||||
8605 | |||||||
8606 | if (Name.getNameKind() == DeclarationName::CXXConstructorName) { | ||||||
8607 | // This is a C++ constructor declaration. | ||||||
8608 | assert(DC->isRecord() &&(static_cast <bool> (DC->isRecord() && "Constructors can only be declared in a member context" ) ? void (0) : __assert_fail ("DC->isRecord() && \"Constructors can only be declared in a member context\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8609, __extension__ __PRETTY_FUNCTION__)) | ||||||
8609 | "Constructors can only be declared in a member context")(static_cast <bool> (DC->isRecord() && "Constructors can only be declared in a member context" ) ? void (0) : __assert_fail ("DC->isRecord() && \"Constructors can only be declared in a member context\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8609, __extension__ __PRETTY_FUNCTION__)); | ||||||
8610 | |||||||
8611 | R = SemaRef.CheckConstructorDeclarator(D, R, SC); | ||||||
8612 | return CXXConstructorDecl::Create( | ||||||
8613 | SemaRef.Context, cast<CXXRecordDecl>(DC), D.getBeginLoc(), NameInfo, R, | ||||||
8614 | TInfo, ExplicitSpecifier, SemaRef.getCurFPFeatures().isFPConstrained(), | ||||||
8615 | isInline, /*isImplicitlyDeclared=*/false, ConstexprKind, | ||||||
8616 | InheritedConstructor(), TrailingRequiresClause); | ||||||
8617 | |||||||
8618 | } else if (Name.getNameKind() == DeclarationName::CXXDestructorName) { | ||||||
8619 | // This is a C++ destructor declaration. | ||||||
8620 | if (DC->isRecord()) { | ||||||
8621 | R = SemaRef.CheckDestructorDeclarator(D, R, SC); | ||||||
8622 | CXXRecordDecl *Record = cast<CXXRecordDecl>(DC); | ||||||
8623 | CXXDestructorDecl *NewDD = CXXDestructorDecl::Create( | ||||||
8624 | SemaRef.Context, Record, D.getBeginLoc(), NameInfo, R, TInfo, | ||||||
8625 | SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8626 | /*isImplicitlyDeclared=*/false, ConstexprKind, | ||||||
8627 | TrailingRequiresClause); | ||||||
8628 | |||||||
8629 | // If the destructor needs an implicit exception specification, set it | ||||||
8630 | // now. FIXME: It'd be nice to be able to create the right type to start | ||||||
8631 | // with, but the type needs to reference the destructor declaration. | ||||||
8632 | if (SemaRef.getLangOpts().CPlusPlus11) | ||||||
8633 | SemaRef.AdjustDestructorExceptionSpec(NewDD); | ||||||
8634 | |||||||
8635 | IsVirtualOkay = true; | ||||||
8636 | return NewDD; | ||||||
8637 | |||||||
8638 | } else { | ||||||
8639 | SemaRef.Diag(D.getIdentifierLoc(), diag::err_destructor_not_member); | ||||||
8640 | D.setInvalidType(); | ||||||
8641 | |||||||
8642 | // Create a FunctionDecl to satisfy the function definition parsing | ||||||
8643 | // code path. | ||||||
8644 | return FunctionDecl::Create( | ||||||
8645 | SemaRef.Context, DC, D.getBeginLoc(), D.getIdentifierLoc(), Name, R, | ||||||
8646 | TInfo, SC, SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8647 | /*hasPrototype=*/true, ConstexprKind, TrailingRequiresClause); | ||||||
8648 | } | ||||||
8649 | |||||||
8650 | } else if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName) { | ||||||
8651 | if (!DC->isRecord()) { | ||||||
8652 | SemaRef.Diag(D.getIdentifierLoc(), | ||||||
8653 | diag::err_conv_function_not_member); | ||||||
8654 | return nullptr; | ||||||
8655 | } | ||||||
8656 | |||||||
8657 | SemaRef.CheckConversionDeclarator(D, R, SC); | ||||||
8658 | if (D.isInvalidType()) | ||||||
8659 | return nullptr; | ||||||
8660 | |||||||
8661 | IsVirtualOkay = true; | ||||||
8662 | return CXXConversionDecl::Create( | ||||||
8663 | SemaRef.Context, cast<CXXRecordDecl>(DC), D.getBeginLoc(), NameInfo, R, | ||||||
8664 | TInfo, SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8665 | ExplicitSpecifier, ConstexprKind, SourceLocation(), | ||||||
8666 | TrailingRequiresClause); | ||||||
8667 | |||||||
8668 | } else if (Name.getNameKind() == DeclarationName::CXXDeductionGuideName) { | ||||||
8669 | if (TrailingRequiresClause) | ||||||
8670 | SemaRef.Diag(TrailingRequiresClause->getBeginLoc(), | ||||||
8671 | diag::err_trailing_requires_clause_on_deduction_guide) | ||||||
8672 | << TrailingRequiresClause->getSourceRange(); | ||||||
8673 | SemaRef.CheckDeductionGuideDeclarator(D, R, SC); | ||||||
8674 | |||||||
8675 | return CXXDeductionGuideDecl::Create(SemaRef.Context, DC, D.getBeginLoc(), | ||||||
8676 | ExplicitSpecifier, NameInfo, R, TInfo, | ||||||
8677 | D.getEndLoc()); | ||||||
8678 | } else if (DC->isRecord()) { | ||||||
8679 | // If the name of the function is the same as the name of the record, | ||||||
8680 | // then this must be an invalid constructor that has a return type. | ||||||
8681 | // (The parser checks for a return type and makes the declarator a | ||||||
8682 | // constructor if it has no return type). | ||||||
8683 | if (Name.getAsIdentifierInfo() && | ||||||
8684 | Name.getAsIdentifierInfo() == cast<CXXRecordDecl>(DC)->getIdentifier()){ | ||||||
8685 | SemaRef.Diag(D.getIdentifierLoc(), diag::err_constructor_return_type) | ||||||
8686 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) | ||||||
8687 | << SourceRange(D.getIdentifierLoc()); | ||||||
8688 | return nullptr; | ||||||
8689 | } | ||||||
8690 | |||||||
8691 | // This is a C++ method declaration. | ||||||
8692 | CXXMethodDecl *Ret = CXXMethodDecl::Create( | ||||||
8693 | SemaRef.Context, cast<CXXRecordDecl>(DC), D.getBeginLoc(), NameInfo, R, | ||||||
8694 | TInfo, SC, SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8695 | ConstexprKind, SourceLocation(), TrailingRequiresClause); | ||||||
8696 | IsVirtualOkay = !Ret->isStatic(); | ||||||
8697 | return Ret; | ||||||
8698 | } else { | ||||||
8699 | bool isFriend = | ||||||
8700 | SemaRef.getLangOpts().CPlusPlus && D.getDeclSpec().isFriendSpecified(); | ||||||
8701 | if (!isFriend && SemaRef.CurContext->isRecord()) | ||||||
8702 | return nullptr; | ||||||
8703 | |||||||
8704 | // Determine whether the function was written with a | ||||||
8705 | // prototype. This true when: | ||||||
8706 | // - we're in C++ (where every function has a prototype), | ||||||
8707 | return FunctionDecl::Create( | ||||||
8708 | SemaRef.Context, DC, D.getBeginLoc(), NameInfo, R, TInfo, SC, | ||||||
8709 | SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8710 | true /*HasPrototype*/, ConstexprKind, TrailingRequiresClause); | ||||||
8711 | } | ||||||
8712 | } | ||||||
8713 | |||||||
8714 | enum OpenCLParamType { | ||||||
8715 | ValidKernelParam, | ||||||
8716 | PtrPtrKernelParam, | ||||||
8717 | PtrKernelParam, | ||||||
8718 | InvalidAddrSpacePtrKernelParam, | ||||||
8719 | InvalidKernelParam, | ||||||
8720 | RecordKernelParam | ||||||
8721 | }; | ||||||
8722 | |||||||
8723 | static bool isOpenCLSizeDependentType(ASTContext &C, QualType Ty) { | ||||||
8724 | // Size dependent types are just typedefs to normal integer types | ||||||
8725 | // (e.g. unsigned long), so we cannot distinguish them from other typedefs to | ||||||
8726 | // integers other than by their names. | ||||||
8727 | StringRef SizeTypeNames[] = {"size_t", "intptr_t", "uintptr_t", "ptrdiff_t"}; | ||||||
8728 | |||||||
8729 | // Remove typedefs one by one until we reach a typedef | ||||||
8730 | // for a size dependent type. | ||||||
8731 | QualType DesugaredTy = Ty; | ||||||
8732 | do { | ||||||
8733 | ArrayRef<StringRef> Names(SizeTypeNames); | ||||||
8734 | auto Match = llvm::find(Names, DesugaredTy.getUnqualifiedType().getAsString()); | ||||||
8735 | if (Names.end() != Match) | ||||||
8736 | return true; | ||||||
8737 | |||||||
8738 | Ty = DesugaredTy; | ||||||
8739 | DesugaredTy = Ty.getSingleStepDesugaredType(C); | ||||||
8740 | } while (DesugaredTy != Ty); | ||||||
8741 | |||||||
8742 | return false; | ||||||
8743 | } | ||||||
8744 | |||||||
8745 | static OpenCLParamType getOpenCLKernelParameterType(Sema &S, QualType PT) { | ||||||
8746 | if (PT->isDependentType()) | ||||||
8747 | return InvalidKernelParam; | ||||||
8748 | |||||||
8749 | if (PT->isPointerType() || PT->isReferenceType()) { | ||||||
8750 | QualType PointeeType = PT->getPointeeType(); | ||||||
8751 | if (PointeeType.getAddressSpace() == LangAS::opencl_generic || | ||||||
8752 | PointeeType.getAddressSpace() == LangAS::opencl_private || | ||||||
8753 | PointeeType.getAddressSpace() == LangAS::Default) | ||||||
8754 | return InvalidAddrSpacePtrKernelParam; | ||||||
8755 | |||||||
8756 | if (PointeeType->isPointerType()) { | ||||||
8757 | // This is a pointer to pointer parameter. | ||||||
8758 | // Recursively check inner type. | ||||||
8759 | OpenCLParamType ParamKind = getOpenCLKernelParameterType(S, PointeeType); | ||||||
8760 | if (ParamKind == InvalidAddrSpacePtrKernelParam || | ||||||
8761 | ParamKind == InvalidKernelParam) | ||||||
8762 | return ParamKind; | ||||||
8763 | |||||||
8764 | return PtrPtrKernelParam; | ||||||
8765 | } | ||||||
8766 | |||||||
8767 | // C++ for OpenCL v1.0 s2.4: | ||||||
8768 | // Moreover the types used in parameters of the kernel functions must be: | ||||||
8769 | // Standard layout types for pointer parameters. The same applies to | ||||||
8770 | // reference if an implementation supports them in kernel parameters. | ||||||
8771 | if (S.getLangOpts().OpenCLCPlusPlus && | ||||||
8772 | !S.getOpenCLOptions().isAvailableOption( | ||||||
8773 | "__cl_clang_non_portable_kernel_param_types", S.getLangOpts()) && | ||||||
8774 | !PointeeType->isAtomicType() && !PointeeType->isVoidType() && | ||||||
8775 | !PointeeType->isStandardLayoutType()) | ||||||
8776 | return InvalidKernelParam; | ||||||
8777 | |||||||
8778 | return PtrKernelParam; | ||||||
8779 | } | ||||||
8780 | |||||||
8781 | // OpenCL v1.2 s6.9.k: | ||||||
8782 | // Arguments to kernel functions in a program cannot be declared with the | ||||||
8783 | // built-in scalar types bool, half, size_t, ptrdiff_t, intptr_t, and | ||||||
8784 | // uintptr_t or a struct and/or union that contain fields declared to be one | ||||||
8785 | // of these built-in scalar types. | ||||||
8786 | if (isOpenCLSizeDependentType(S.getASTContext(), PT)) | ||||||
8787 | return InvalidKernelParam; | ||||||
8788 | |||||||
8789 | if (PT->isImageType()) | ||||||
8790 | return PtrKernelParam; | ||||||
8791 | |||||||
8792 | if (PT->isBooleanType() || PT->isEventT() || PT->isReserveIDT()) | ||||||
8793 | return InvalidKernelParam; | ||||||
8794 | |||||||
8795 | // OpenCL extension spec v1.2 s9.5: | ||||||
8796 | // This extension adds support for half scalar and vector types as built-in | ||||||
8797 | // types that can be used for arithmetic operations, conversions etc. | ||||||
8798 | if (!S.getOpenCLOptions().isAvailableOption("cl_khr_fp16", S.getLangOpts()) && | ||||||
8799 | PT->isHalfType()) | ||||||
8800 | return InvalidKernelParam; | ||||||
8801 | |||||||
8802 | // Look into an array argument to check if it has a forbidden type. | ||||||
8803 | if (PT->isArrayType()) { | ||||||
8804 | const Type *UnderlyingTy = PT->getPointeeOrArrayElementType(); | ||||||
8805 | // Call ourself to check an underlying type of an array. Since the | ||||||
8806 | // getPointeeOrArrayElementType returns an innermost type which is not an | ||||||
8807 | // array, this recursive call only happens once. | ||||||
8808 | return getOpenCLKernelParameterType(S, QualType(UnderlyingTy, 0)); | ||||||
8809 | } | ||||||
8810 | |||||||
8811 | // C++ for OpenCL v1.0 s2.4: | ||||||
8812 | // Moreover the types used in parameters of the kernel functions must be: | ||||||
8813 | // Trivial and standard-layout types C++17 [basic.types] (plain old data | ||||||
8814 | // types) for parameters passed by value; | ||||||
8815 | if (S.getLangOpts().OpenCLCPlusPlus && | ||||||
8816 | !S.getOpenCLOptions().isAvailableOption( | ||||||
8817 | "__cl_clang_non_portable_kernel_param_types", S.getLangOpts()) && | ||||||
8818 | !PT->isOpenCLSpecificType() && !PT.isPODType(S.Context)) | ||||||
8819 | return InvalidKernelParam; | ||||||
8820 | |||||||
8821 | if (PT->isRecordType()) | ||||||
8822 | return RecordKernelParam; | ||||||
8823 | |||||||
8824 | return ValidKernelParam; | ||||||
8825 | } | ||||||
8826 | |||||||
8827 | static void checkIsValidOpenCLKernelParameter( | ||||||
8828 | Sema &S, | ||||||
8829 | Declarator &D, | ||||||
8830 | ParmVarDecl *Param, | ||||||
8831 | llvm::SmallPtrSetImpl<const Type *> &ValidTypes) { | ||||||
8832 | QualType PT = Param->getType(); | ||||||
8833 | |||||||
8834 | // Cache the valid types we encounter to avoid rechecking structs that are | ||||||
8835 | // used again | ||||||
8836 | if (ValidTypes.count(PT.getTypePtr())) | ||||||
8837 | return; | ||||||
8838 | |||||||
8839 | switch (getOpenCLKernelParameterType(S, PT)) { | ||||||
8840 | case PtrPtrKernelParam: | ||||||
8841 | // OpenCL v3.0 s6.11.a: | ||||||
8842 | // A kernel function argument cannot be declared as a pointer to a pointer | ||||||
8843 | // type. [...] This restriction only applies to OpenCL C 1.2 or below. | ||||||
8844 | if (S.getLangOpts().getOpenCLCompatibleVersion() <= 120) { | ||||||
8845 | S.Diag(Param->getLocation(), diag::err_opencl_ptrptr_kernel_param); | ||||||
8846 | D.setInvalidType(); | ||||||
8847 | return; | ||||||
8848 | } | ||||||
8849 | |||||||
8850 | ValidTypes.insert(PT.getTypePtr()); | ||||||
8851 | return; | ||||||
8852 | |||||||
8853 | case InvalidAddrSpacePtrKernelParam: | ||||||
8854 | // OpenCL v1.0 s6.5: | ||||||
8855 | // __kernel function arguments declared to be a pointer of a type can point | ||||||
8856 | // to one of the following address spaces only : __global, __local or | ||||||
8857 | // __constant. | ||||||
8858 | S.Diag(Param->getLocation(), diag::err_kernel_arg_address_space); | ||||||
8859 | D.setInvalidType(); | ||||||
8860 | return; | ||||||
8861 | |||||||
8862 | // OpenCL v1.2 s6.9.k: | ||||||
8863 | // Arguments to kernel functions in a program cannot be declared with the | ||||||
8864 | // built-in scalar types bool, half, size_t, ptrdiff_t, intptr_t, and | ||||||
8865 | // uintptr_t or a struct and/or union that contain fields declared to be | ||||||
8866 | // one of these built-in scalar types. | ||||||
8867 | |||||||
8868 | case InvalidKernelParam: | ||||||
8869 | // OpenCL v1.2 s6.8 n: | ||||||
8870 | // A kernel function argument cannot be declared | ||||||
8871 | // of event_t type. | ||||||
8872 | // Do not diagnose half type since it is diagnosed as invalid argument | ||||||
8873 | // type for any function elsewhere. | ||||||
8874 | if (!PT->isHalfType()) { | ||||||
8875 | S.Diag(Param->getLocation(), diag::err_bad_kernel_param_type) << PT; | ||||||
8876 | |||||||
8877 | // Explain what typedefs are involved. | ||||||
8878 | const TypedefType *Typedef = nullptr; | ||||||
8879 | while ((Typedef = PT->getAs<TypedefType>())) { | ||||||
8880 | SourceLocation Loc = Typedef->getDecl()->getLocation(); | ||||||
8881 | // SourceLocation may be invalid for a built-in type. | ||||||
8882 | if (Loc.isValid()) | ||||||
8883 | S.Diag(Loc, diag::note_entity_declared_at) << PT; | ||||||
8884 | PT = Typedef->desugar(); | ||||||
8885 | } | ||||||
8886 | } | ||||||
8887 | |||||||
8888 | D.setInvalidType(); | ||||||
8889 | return; | ||||||
8890 | |||||||
8891 | case PtrKernelParam: | ||||||
8892 | case ValidKernelParam: | ||||||
8893 | ValidTypes.insert(PT.getTypePtr()); | ||||||
8894 | return; | ||||||
8895 | |||||||
8896 | case RecordKernelParam: | ||||||
8897 | break; | ||||||
8898 | } | ||||||
8899 | |||||||
8900 | // Track nested structs we will inspect | ||||||
8901 | SmallVector<const Decl *, 4> VisitStack; | ||||||
8902 | |||||||
8903 | // Track where we are in the nested structs. Items will migrate from | ||||||
8904 | // VisitStack to HistoryStack as we do the DFS for bad field. | ||||||
8905 | SmallVector<const FieldDecl *, 4> HistoryStack; | ||||||
8906 | HistoryStack.push_back(nullptr); | ||||||
8907 | |||||||
8908 | // At this point we already handled everything except of a RecordType or | ||||||
8909 | // an ArrayType of a RecordType. | ||||||
8910 | assert((PT->isArrayType() || PT->isRecordType()) && "Unexpected type.")(static_cast <bool> ((PT->isArrayType() || PT->isRecordType ()) && "Unexpected type.") ? void (0) : __assert_fail ("(PT->isArrayType() || PT->isRecordType()) && \"Unexpected type.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8910, __extension__ __PRETTY_FUNCTION__)); | ||||||
8911 | const RecordType *RecTy = | ||||||
8912 | PT->getPointeeOrArrayElementType()->getAs<RecordType>(); | ||||||
8913 | const RecordDecl *OrigRecDecl = RecTy->getDecl(); | ||||||
8914 | |||||||
8915 | VisitStack.push_back(RecTy->getDecl()); | ||||||
8916 | assert(VisitStack.back() && "First decl null?")(static_cast <bool> (VisitStack.back() && "First decl null?" ) ? void (0) : __assert_fail ("VisitStack.back() && \"First decl null?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8916, __extension__ __PRETTY_FUNCTION__)); | ||||||
8917 | |||||||
8918 | do { | ||||||
8919 | const Decl *Next = VisitStack.pop_back_val(); | ||||||
8920 | if (!Next) { | ||||||
8921 | assert(!HistoryStack.empty())(static_cast <bool> (!HistoryStack.empty()) ? void (0) : __assert_fail ("!HistoryStack.empty()", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8921, __extension__ __PRETTY_FUNCTION__)); | ||||||
8922 | // Found a marker, we have gone up a level | ||||||
8923 | if (const FieldDecl *Hist = HistoryStack.pop_back_val()) | ||||||
8924 | ValidTypes.insert(Hist->getType().getTypePtr()); | ||||||
8925 | |||||||
8926 | continue; | ||||||
8927 | } | ||||||
8928 | |||||||
8929 | // Adds everything except the original parameter declaration (which is not a | ||||||
8930 | // field itself) to the history stack. | ||||||
8931 | const RecordDecl *RD; | ||||||
8932 | if (const FieldDecl *Field = dyn_cast<FieldDecl>(Next)) { | ||||||
8933 | HistoryStack.push_back(Field); | ||||||
8934 | |||||||
8935 | QualType FieldTy = Field->getType(); | ||||||
8936 | // Other field types (known to be valid or invalid) are handled while we | ||||||
8937 | // walk around RecordDecl::fields(). | ||||||
8938 | assert((FieldTy->isArrayType() || FieldTy->isRecordType()) &&(static_cast <bool> ((FieldTy->isArrayType() || FieldTy ->isRecordType()) && "Unexpected type.") ? void (0 ) : __assert_fail ("(FieldTy->isArrayType() || FieldTy->isRecordType()) && \"Unexpected type.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8939, __extension__ __PRETTY_FUNCTION__)) | ||||||
8939 | "Unexpected type.")(static_cast <bool> ((FieldTy->isArrayType() || FieldTy ->isRecordType()) && "Unexpected type.") ? void (0 ) : __assert_fail ("(FieldTy->isArrayType() || FieldTy->isRecordType()) && \"Unexpected type.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 8939, __extension__ __PRETTY_FUNCTION__)); | ||||||
8940 | const Type *FieldRecTy = FieldTy->getPointeeOrArrayElementType(); | ||||||
8941 | |||||||
8942 | RD = FieldRecTy->castAs<RecordType>()->getDecl(); | ||||||
8943 | } else { | ||||||
8944 | RD = cast<RecordDecl>(Next); | ||||||
8945 | } | ||||||
8946 | |||||||
8947 | // Add a null marker so we know when we've gone back up a level | ||||||
8948 | VisitStack.push_back(nullptr); | ||||||
8949 | |||||||
8950 | for (const auto *FD : RD->fields()) { | ||||||
8951 | QualType QT = FD->getType(); | ||||||
8952 | |||||||
8953 | if (ValidTypes.count(QT.getTypePtr())) | ||||||
8954 | continue; | ||||||
8955 | |||||||
8956 | OpenCLParamType ParamType = getOpenCLKernelParameterType(S, QT); | ||||||
8957 | if (ParamType == ValidKernelParam) | ||||||
8958 | continue; | ||||||
8959 | |||||||
8960 | if (ParamType == RecordKernelParam) { | ||||||
8961 | VisitStack.push_back(FD); | ||||||
8962 | continue; | ||||||
8963 | } | ||||||
8964 | |||||||
8965 | // OpenCL v1.2 s6.9.p: | ||||||
8966 | // Arguments to kernel functions that are declared to be a struct or union | ||||||
8967 | // do not allow OpenCL objects to be passed as elements of the struct or | ||||||
8968 | // union. | ||||||
8969 | if (ParamType == PtrKernelParam || ParamType == PtrPtrKernelParam || | ||||||
8970 | ParamType == InvalidAddrSpacePtrKernelParam) { | ||||||
8971 | S.Diag(Param->getLocation(), | ||||||
8972 | diag::err_record_with_pointers_kernel_param) | ||||||
8973 | << PT->isUnionType() | ||||||
8974 | << PT; | ||||||
8975 | } else { | ||||||
8976 | S.Diag(Param->getLocation(), diag::err_bad_kernel_param_type) << PT; | ||||||
8977 | } | ||||||
8978 | |||||||
8979 | S.Diag(OrigRecDecl->getLocation(), diag::note_within_field_of_type) | ||||||
8980 | << OrigRecDecl->getDeclName(); | ||||||
8981 | |||||||
8982 | // We have an error, now let's go back up through history and show where | ||||||
8983 | // the offending field came from | ||||||
8984 | for (ArrayRef<const FieldDecl *>::const_iterator | ||||||
8985 | I = HistoryStack.begin() + 1, | ||||||
8986 | E = HistoryStack.end(); | ||||||
8987 | I != E; ++I) { | ||||||
8988 | const FieldDecl *OuterField = *I; | ||||||
8989 | S.Diag(OuterField->getLocation(), diag::note_within_field_of_type) | ||||||
8990 | << OuterField->getType(); | ||||||
8991 | } | ||||||
8992 | |||||||
8993 | S.Diag(FD->getLocation(), diag::note_illegal_field_declared_here) | ||||||
8994 | << QT->isPointerType() | ||||||
8995 | << QT; | ||||||
8996 | D.setInvalidType(); | ||||||
8997 | return; | ||||||
8998 | } | ||||||
8999 | } while (!VisitStack.empty()); | ||||||
9000 | } | ||||||
9001 | |||||||
9002 | /// Find the DeclContext in which a tag is implicitly declared if we see an | ||||||
9003 | /// elaborated type specifier in the specified context, and lookup finds | ||||||
9004 | /// nothing. | ||||||
9005 | static DeclContext *getTagInjectionContext(DeclContext *DC) { | ||||||
9006 | while (!DC->isFileContext() && !DC->isFunctionOrMethod()) | ||||||
9007 | DC = DC->getParent(); | ||||||
9008 | return DC; | ||||||
9009 | } | ||||||
9010 | |||||||
9011 | /// Find the Scope in which a tag is implicitly declared if we see an | ||||||
9012 | /// elaborated type specifier in the specified context, and lookup finds | ||||||
9013 | /// nothing. | ||||||
9014 | static Scope *getTagInjectionScope(Scope *S, const LangOptions &LangOpts) { | ||||||
9015 | while (S->isClassScope() || | ||||||
9016 | (LangOpts.CPlusPlus && | ||||||
9017 | S->isFunctionPrototypeScope()) || | ||||||
9018 | ((S->getFlags() & Scope::DeclScope) == 0) || | ||||||
9019 | (S->getEntity() && S->getEntity()->isTransparentContext())) | ||||||
9020 | S = S->getParent(); | ||||||
9021 | return S; | ||||||
9022 | } | ||||||
9023 | |||||||
9024 | NamedDecl* | ||||||
9025 | Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC, | ||||||
9026 | TypeSourceInfo *TInfo, LookupResult &Previous, | ||||||
9027 | MultiTemplateParamsArg TemplateParamListsRef, | ||||||
9028 | bool &AddToScope) { | ||||||
9029 | QualType R = TInfo->getType(); | ||||||
9030 | |||||||
9031 | assert(R->isFunctionType())(static_cast <bool> (R->isFunctionType()) ? void (0) : __assert_fail ("R->isFunctionType()", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9031, __extension__ __PRETTY_FUNCTION__)); | ||||||
9032 | if (R.getCanonicalType()->castAs<FunctionType>()->getCmseNSCallAttr()) | ||||||
9033 | Diag(D.getIdentifierLoc(), diag::err_function_decl_cmse_ns_call); | ||||||
9034 | |||||||
9035 | SmallVector<TemplateParameterList *, 4> TemplateParamLists; | ||||||
9036 | for (TemplateParameterList *TPL : TemplateParamListsRef) | ||||||
9037 | TemplateParamLists.push_back(TPL); | ||||||
9038 | if (TemplateParameterList *Invented = D.getInventedTemplateParameterList()) { | ||||||
9039 | if (!TemplateParamLists.empty() && | ||||||
9040 | Invented->getDepth() == TemplateParamLists.back()->getDepth()) | ||||||
9041 | TemplateParamLists.back() = Invented; | ||||||
9042 | else | ||||||
9043 | TemplateParamLists.push_back(Invented); | ||||||
9044 | } | ||||||
9045 | |||||||
9046 | // TODO: consider using NameInfo for diagnostic. | ||||||
9047 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||
9048 | DeclarationName Name = NameInfo.getName(); | ||||||
9049 | StorageClass SC = getFunctionStorageClass(*this, D); | ||||||
9050 | |||||||
9051 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) | ||||||
9052 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
9053 | diag::err_invalid_thread) | ||||||
9054 | << DeclSpec::getSpecifierName(TSCS); | ||||||
9055 | |||||||
9056 | if (D.isFirstDeclarationOfMember()) | ||||||
9057 | adjustMemberFunctionCC(R, D.isStaticMember(), D.isCtorOrDtor(), | ||||||
9058 | D.getIdentifierLoc()); | ||||||
9059 | |||||||
9060 | bool isFriend = false; | ||||||
9061 | FunctionTemplateDecl *FunctionTemplate = nullptr; | ||||||
9062 | bool isMemberSpecialization = false; | ||||||
9063 | bool isFunctionTemplateSpecialization = false; | ||||||
9064 | |||||||
9065 | bool isDependentClassScopeExplicitSpecialization = false; | ||||||
9066 | bool HasExplicitTemplateArgs = false; | ||||||
9067 | TemplateArgumentListInfo TemplateArgs; | ||||||
9068 | |||||||
9069 | bool isVirtualOkay = false; | ||||||
9070 | |||||||
9071 | DeclContext *OriginalDC = DC; | ||||||
9072 | bool IsLocalExternDecl = adjustContextForLocalExternDecl(DC); | ||||||
9073 | |||||||
9074 | FunctionDecl *NewFD = CreateNewFunctionDecl(*this, D, DC, R, TInfo, SC, | ||||||
9075 | isVirtualOkay); | ||||||
9076 | if (!NewFD) return nullptr; | ||||||
9077 | |||||||
9078 | if (OriginalLexicalContext && OriginalLexicalContext->isObjCContainer()) | ||||||
9079 | NewFD->setTopLevelDeclInObjCContainer(); | ||||||
9080 | |||||||
9081 | // Set the lexical context. If this is a function-scope declaration, or has a | ||||||
9082 | // C++ scope specifier, or is the object of a friend declaration, the lexical | ||||||
9083 | // context will be different from the semantic context. | ||||||
9084 | NewFD->setLexicalDeclContext(CurContext); | ||||||
9085 | |||||||
9086 | if (IsLocalExternDecl) | ||||||
9087 | NewFD->setLocalExternDecl(); | ||||||
9088 | |||||||
9089 | if (getLangOpts().CPlusPlus) { | ||||||
9090 | bool isInline = D.getDeclSpec().isInlineSpecified(); | ||||||
9091 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); | ||||||
9092 | bool hasExplicit = D.getDeclSpec().hasExplicitSpecifier(); | ||||||
9093 | isFriend = D.getDeclSpec().isFriendSpecified(); | ||||||
9094 | if (isFriend && !isInline && D.isFunctionDefinition()) { | ||||||
9095 | // C++ [class.friend]p5 | ||||||
9096 | // A function can be defined in a friend declaration of a | ||||||
9097 | // class . . . . Such a function is implicitly inline. | ||||||
9098 | NewFD->setImplicitlyInline(); | ||||||
9099 | } | ||||||
9100 | |||||||
9101 | // If this is a method defined in an __interface, and is not a constructor | ||||||
9102 | // or an overloaded operator, then set the pure flag (isVirtual will already | ||||||
9103 | // return true). | ||||||
9104 | if (const CXXRecordDecl *Parent = | ||||||
9105 | dyn_cast<CXXRecordDecl>(NewFD->getDeclContext())) { | ||||||
9106 | if (Parent->isInterface() && cast<CXXMethodDecl>(NewFD)->isUserProvided()) | ||||||
9107 | NewFD->setPure(true); | ||||||
9108 | |||||||
9109 | // C++ [class.union]p2 | ||||||
9110 | // A union can have member functions, but not virtual functions. | ||||||
9111 | if (isVirtual && Parent->isUnion()) { | ||||||
9112 | Diag(D.getDeclSpec().getVirtualSpecLoc(), diag::err_virtual_in_union); | ||||||
9113 | NewFD->setInvalidDecl(); | ||||||
9114 | } | ||||||
9115 | } | ||||||
9116 | |||||||
9117 | SetNestedNameSpecifier(*this, NewFD, D); | ||||||
9118 | isMemberSpecialization = false; | ||||||
9119 | isFunctionTemplateSpecialization = false; | ||||||
9120 | if (D.isInvalidType()) | ||||||
9121 | NewFD->setInvalidDecl(); | ||||||
9122 | |||||||
9123 | // Match up the template parameter lists with the scope specifier, then | ||||||
9124 | // determine whether we have a template or a template specialization. | ||||||
9125 | bool Invalid = false; | ||||||
9126 | TemplateParameterList *TemplateParams = | ||||||
9127 | MatchTemplateParametersToScopeSpecifier( | ||||||
9128 | D.getDeclSpec().getBeginLoc(), D.getIdentifierLoc(), | ||||||
9129 | D.getCXXScopeSpec(), | ||||||
9130 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId | ||||||
9131 | ? D.getName().TemplateId | ||||||
9132 | : nullptr, | ||||||
9133 | TemplateParamLists, isFriend, isMemberSpecialization, | ||||||
9134 | Invalid); | ||||||
9135 | if (TemplateParams) { | ||||||
9136 | // Check that we can declare a template here. | ||||||
9137 | if (CheckTemplateDeclScope(S, TemplateParams)) | ||||||
9138 | NewFD->setInvalidDecl(); | ||||||
9139 | |||||||
9140 | if (TemplateParams->size() > 0) { | ||||||
9141 | // This is a function template | ||||||
9142 | |||||||
9143 | // A destructor cannot be a template. | ||||||
9144 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { | ||||||
9145 | Diag(NewFD->getLocation(), diag::err_destructor_template); | ||||||
9146 | NewFD->setInvalidDecl(); | ||||||
9147 | } | ||||||
9148 | |||||||
9149 | // If we're adding a template to a dependent context, we may need to | ||||||
9150 | // rebuilding some of the types used within the template parameter list, | ||||||
9151 | // now that we know what the current instantiation is. | ||||||
9152 | if (DC->isDependentContext()) { | ||||||
9153 | ContextRAII SavedContext(*this, DC); | ||||||
9154 | if (RebuildTemplateParamsInCurrentInstantiation(TemplateParams)) | ||||||
9155 | Invalid = true; | ||||||
9156 | } | ||||||
9157 | |||||||
9158 | FunctionTemplate = FunctionTemplateDecl::Create(Context, DC, | ||||||
9159 | NewFD->getLocation(), | ||||||
9160 | Name, TemplateParams, | ||||||
9161 | NewFD); | ||||||
9162 | FunctionTemplate->setLexicalDeclContext(CurContext); | ||||||
9163 | NewFD->setDescribedFunctionTemplate(FunctionTemplate); | ||||||
9164 | |||||||
9165 | // For source fidelity, store the other template param lists. | ||||||
9166 | if (TemplateParamLists.size() > 1) { | ||||||
9167 | NewFD->setTemplateParameterListsInfo(Context, | ||||||
9168 | ArrayRef<TemplateParameterList *>(TemplateParamLists) | ||||||
9169 | .drop_back(1)); | ||||||
9170 | } | ||||||
9171 | } else { | ||||||
9172 | // This is a function template specialization. | ||||||
9173 | isFunctionTemplateSpecialization = true; | ||||||
9174 | // For source fidelity, store all the template param lists. | ||||||
9175 | if (TemplateParamLists.size() > 0) | ||||||
9176 | NewFD->setTemplateParameterListsInfo(Context, TemplateParamLists); | ||||||
9177 | |||||||
9178 | // C++0x [temp.expl.spec]p20 forbids "template<> friend void foo(int);". | ||||||
9179 | if (isFriend) { | ||||||
9180 | // We want to remove the "template<>", found here. | ||||||
9181 | SourceRange RemoveRange = TemplateParams->getSourceRange(); | ||||||
9182 | |||||||
9183 | // If we remove the template<> and the name is not a | ||||||
9184 | // template-id, we're actually silently creating a problem: | ||||||
9185 | // the friend declaration will refer to an untemplated decl, | ||||||
9186 | // and clearly the user wants a template specialization. So | ||||||
9187 | // we need to insert '<>' after the name. | ||||||
9188 | SourceLocation InsertLoc; | ||||||
9189 | if (D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) { | ||||||
9190 | InsertLoc = D.getName().getSourceRange().getEnd(); | ||||||
9191 | InsertLoc = getLocForEndOfToken(InsertLoc); | ||||||
9192 | } | ||||||
9193 | |||||||
9194 | Diag(D.getIdentifierLoc(), diag::err_template_spec_decl_friend) | ||||||
9195 | << Name << RemoveRange | ||||||
9196 | << FixItHint::CreateRemoval(RemoveRange) | ||||||
9197 | << FixItHint::CreateInsertion(InsertLoc, "<>"); | ||||||
9198 | } | ||||||
9199 | } | ||||||
9200 | } else { | ||||||
9201 | // Check that we can declare a template here. | ||||||
9202 | if (!TemplateParamLists.empty() && isMemberSpecialization && | ||||||
9203 | CheckTemplateDeclScope(S, TemplateParamLists.back())) | ||||||
9204 | NewFD->setInvalidDecl(); | ||||||
9205 | |||||||
9206 | // All template param lists were matched against the scope specifier: | ||||||
9207 | // this is NOT (an explicit specialization of) a template. | ||||||
9208 | if (TemplateParamLists.size() > 0) | ||||||
9209 | // For source fidelity, store all the template param lists. | ||||||
9210 | NewFD->setTemplateParameterListsInfo(Context, TemplateParamLists); | ||||||
9211 | } | ||||||
9212 | |||||||
9213 | if (Invalid) { | ||||||
9214 | NewFD->setInvalidDecl(); | ||||||
9215 | if (FunctionTemplate) | ||||||
9216 | FunctionTemplate->setInvalidDecl(); | ||||||
9217 | } | ||||||
9218 | |||||||
9219 | // C++ [dcl.fct.spec]p5: | ||||||
9220 | // The virtual specifier shall only be used in declarations of | ||||||
9221 | // nonstatic class member functions that appear within a | ||||||
9222 | // member-specification of a class declaration; see 10.3. | ||||||
9223 | // | ||||||
9224 | if (isVirtual && !NewFD->isInvalidDecl()) { | ||||||
9225 | if (!isVirtualOkay) { | ||||||
9226 | Diag(D.getDeclSpec().getVirtualSpecLoc(), | ||||||
9227 | diag::err_virtual_non_function); | ||||||
9228 | } else if (!CurContext->isRecord()) { | ||||||
9229 | // 'virtual' was specified outside of the class. | ||||||
9230 | Diag(D.getDeclSpec().getVirtualSpecLoc(), | ||||||
9231 | diag::err_virtual_out_of_class) | ||||||
9232 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); | ||||||
9233 | } else if (NewFD->getDescribedFunctionTemplate()) { | ||||||
9234 | // C++ [temp.mem]p3: | ||||||
9235 | // A member function template shall not be virtual. | ||||||
9236 | Diag(D.getDeclSpec().getVirtualSpecLoc(), | ||||||
9237 | diag::err_virtual_member_function_template) | ||||||
9238 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); | ||||||
9239 | } else { | ||||||
9240 | // Okay: Add virtual to the method. | ||||||
9241 | NewFD->setVirtualAsWritten(true); | ||||||
9242 | } | ||||||
9243 | |||||||
9244 | if (getLangOpts().CPlusPlus14 && | ||||||
9245 | NewFD->getReturnType()->isUndeducedType()) | ||||||
9246 | Diag(D.getDeclSpec().getVirtualSpecLoc(), diag::err_auto_fn_virtual); | ||||||
9247 | } | ||||||
9248 | |||||||
9249 | if (getLangOpts().CPlusPlus14 && | ||||||
9250 | (NewFD->isDependentContext() || | ||||||
9251 | (isFriend && CurContext->isDependentContext())) && | ||||||
9252 | NewFD->getReturnType()->isUndeducedType()) { | ||||||
9253 | // If the function template is referenced directly (for instance, as a | ||||||
9254 | // member of the current instantiation), pretend it has a dependent type. | ||||||
9255 | // This is not really justified by the standard, but is the only sane | ||||||
9256 | // thing to do. | ||||||
9257 | // FIXME: For a friend function, we have not marked the function as being | ||||||
9258 | // a friend yet, so 'isDependentContext' on the FD doesn't work. | ||||||
9259 | const FunctionProtoType *FPT = | ||||||
9260 | NewFD->getType()->castAs<FunctionProtoType>(); | ||||||
9261 | QualType Result = | ||||||
9262 | SubstAutoType(FPT->getReturnType(), Context.DependentTy); | ||||||
9263 | NewFD->setType(Context.getFunctionType(Result, FPT->getParamTypes(), | ||||||
9264 | FPT->getExtProtoInfo())); | ||||||
9265 | } | ||||||
9266 | |||||||
9267 | // C++ [dcl.fct.spec]p3: | ||||||
9268 | // The inline specifier shall not appear on a block scope function | ||||||
9269 | // declaration. | ||||||
9270 | if (isInline && !NewFD->isInvalidDecl()) { | ||||||
9271 | if (CurContext->isFunctionOrMethod()) { | ||||||
9272 | // 'inline' is not allowed on block scope function declaration. | ||||||
9273 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
9274 | diag::err_inline_declaration_block_scope) << Name | ||||||
9275 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); | ||||||
9276 | } | ||||||
9277 | } | ||||||
9278 | |||||||
9279 | // C++ [dcl.fct.spec]p6: | ||||||
9280 | // The explicit specifier shall be used only in the declaration of a | ||||||
9281 | // constructor or conversion function within its class definition; | ||||||
9282 | // see 12.3.1 and 12.3.2. | ||||||
9283 | if (hasExplicit && !NewFD->isInvalidDecl() && | ||||||
9284 | !isa<CXXDeductionGuideDecl>(NewFD)) { | ||||||
9285 | if (!CurContext->isRecord()) { | ||||||
9286 | // 'explicit' was specified outside of the class. | ||||||
9287 | Diag(D.getDeclSpec().getExplicitSpecLoc(), | ||||||
9288 | diag::err_explicit_out_of_class) | ||||||
9289 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecRange()); | ||||||
9290 | } else if (!isa<CXXConstructorDecl>(NewFD) && | ||||||
9291 | !isa<CXXConversionDecl>(NewFD)) { | ||||||
9292 | // 'explicit' was specified on a function that wasn't a constructor | ||||||
9293 | // or conversion function. | ||||||
9294 | Diag(D.getDeclSpec().getExplicitSpecLoc(), | ||||||
9295 | diag::err_explicit_non_ctor_or_conv_function) | ||||||
9296 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecRange()); | ||||||
9297 | } | ||||||
9298 | } | ||||||
9299 | |||||||
9300 | ConstexprSpecKind ConstexprKind = D.getDeclSpec().getConstexprSpecifier(); | ||||||
9301 | if (ConstexprKind != ConstexprSpecKind::Unspecified) { | ||||||
9302 | // C++11 [dcl.constexpr]p2: constexpr functions and constexpr constructors | ||||||
9303 | // are implicitly inline. | ||||||
9304 | NewFD->setImplicitlyInline(); | ||||||
9305 | |||||||
9306 | // C++11 [dcl.constexpr]p3: functions declared constexpr are required to | ||||||
9307 | // be either constructors or to return a literal type. Therefore, | ||||||
9308 | // destructors cannot be declared constexpr. | ||||||
9309 | if (isa<CXXDestructorDecl>(NewFD) && | ||||||
9310 | (!getLangOpts().CPlusPlus20 || | ||||||
9311 | ConstexprKind == ConstexprSpecKind::Consteval)) { | ||||||
9312 | Diag(D.getDeclSpec().getConstexprSpecLoc(), diag::err_constexpr_dtor) | ||||||
9313 | << static_cast<int>(ConstexprKind); | ||||||
9314 | NewFD->setConstexprKind(getLangOpts().CPlusPlus20 | ||||||
9315 | ? ConstexprSpecKind::Unspecified | ||||||
9316 | : ConstexprSpecKind::Constexpr); | ||||||
9317 | } | ||||||
9318 | // C++20 [dcl.constexpr]p2: An allocation function, or a | ||||||
9319 | // deallocation function shall not be declared with the consteval | ||||||
9320 | // specifier. | ||||||
9321 | if (ConstexprKind == ConstexprSpecKind::Consteval && | ||||||
9322 | (NewFD->getOverloadedOperator() == OO_New || | ||||||
9323 | NewFD->getOverloadedOperator() == OO_Array_New || | ||||||
9324 | NewFD->getOverloadedOperator() == OO_Delete || | ||||||
9325 | NewFD->getOverloadedOperator() == OO_Array_Delete)) { | ||||||
9326 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
9327 | diag::err_invalid_consteval_decl_kind) | ||||||
9328 | << NewFD; | ||||||
9329 | NewFD->setConstexprKind(ConstexprSpecKind::Constexpr); | ||||||
9330 | } | ||||||
9331 | } | ||||||
9332 | |||||||
9333 | // If __module_private__ was specified, mark the function accordingly. | ||||||
9334 | if (D.getDeclSpec().isModulePrivateSpecified()) { | ||||||
9335 | if (isFunctionTemplateSpecialization) { | ||||||
9336 | SourceLocation ModulePrivateLoc | ||||||
9337 | = D.getDeclSpec().getModulePrivateSpecLoc(); | ||||||
9338 | Diag(ModulePrivateLoc, diag::err_module_private_specialization) | ||||||
9339 | << 0 | ||||||
9340 | << FixItHint::CreateRemoval(ModulePrivateLoc); | ||||||
9341 | } else { | ||||||
9342 | NewFD->setModulePrivate(); | ||||||
9343 | if (FunctionTemplate) | ||||||
9344 | FunctionTemplate->setModulePrivate(); | ||||||
9345 | } | ||||||
9346 | } | ||||||
9347 | |||||||
9348 | if (isFriend) { | ||||||
9349 | if (FunctionTemplate) { | ||||||
9350 | FunctionTemplate->setObjectOfFriendDecl(); | ||||||
9351 | FunctionTemplate->setAccess(AS_public); | ||||||
9352 | } | ||||||
9353 | NewFD->setObjectOfFriendDecl(); | ||||||
9354 | NewFD->setAccess(AS_public); | ||||||
9355 | } | ||||||
9356 | |||||||
9357 | // If a function is defined as defaulted or deleted, mark it as such now. | ||||||
9358 | // We'll do the relevant checks on defaulted / deleted functions later. | ||||||
9359 | switch (D.getFunctionDefinitionKind()) { | ||||||
9360 | case FunctionDefinitionKind::Declaration: | ||||||
9361 | case FunctionDefinitionKind::Definition: | ||||||
9362 | break; | ||||||
9363 | |||||||
9364 | case FunctionDefinitionKind::Defaulted: | ||||||
9365 | NewFD->setDefaulted(); | ||||||
9366 | break; | ||||||
9367 | |||||||
9368 | case FunctionDefinitionKind::Deleted: | ||||||
9369 | NewFD->setDeletedAsWritten(); | ||||||
9370 | break; | ||||||
9371 | } | ||||||
9372 | |||||||
9373 | if (isa<CXXMethodDecl>(NewFD) && DC == CurContext && | ||||||
9374 | D.isFunctionDefinition()) { | ||||||
9375 | // C++ [class.mfct]p2: | ||||||
9376 | // A member function may be defined (8.4) in its class definition, in | ||||||
9377 | // which case it is an inline member function (7.1.2) | ||||||
9378 | NewFD->setImplicitlyInline(); | ||||||
9379 | } | ||||||
9380 | |||||||
9381 | if (SC == SC_Static && isa<CXXMethodDecl>(NewFD) && | ||||||
9382 | !CurContext->isRecord()) { | ||||||
9383 | // C++ [class.static]p1: | ||||||
9384 | // A data or function member of a class may be declared static | ||||||
9385 | // in a class definition, in which case it is a static member of | ||||||
9386 | // the class. | ||||||
9387 | |||||||
9388 | // Complain about the 'static' specifier if it's on an out-of-line | ||||||
9389 | // member function definition. | ||||||
9390 | |||||||
9391 | // MSVC permits the use of a 'static' storage specifier on an out-of-line | ||||||
9392 | // member function template declaration and class member template | ||||||
9393 | // declaration (MSVC versions before 2015), warn about this. | ||||||
9394 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
9395 | ((!getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) && | ||||||
9396 | cast<CXXRecordDecl>(DC)->getDescribedClassTemplate()) || | ||||||
9397 | (getLangOpts().MSVCCompat && NewFD->getDescribedFunctionTemplate())) | ||||||
9398 | ? diag::ext_static_out_of_line : diag::err_static_out_of_line) | ||||||
9399 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
9400 | } | ||||||
9401 | |||||||
9402 | // C++11 [except.spec]p15: | ||||||
9403 | // A deallocation function with no exception-specification is treated | ||||||
9404 | // as if it were specified with noexcept(true). | ||||||
9405 | const FunctionProtoType *FPT = R->getAs<FunctionProtoType>(); | ||||||
9406 | if ((Name.getCXXOverloadedOperator() == OO_Delete || | ||||||
9407 | Name.getCXXOverloadedOperator() == OO_Array_Delete) && | ||||||
9408 | getLangOpts().CPlusPlus11 && FPT && !FPT->hasExceptionSpec()) | ||||||
9409 | NewFD->setType(Context.getFunctionType( | ||||||
9410 | FPT->getReturnType(), FPT->getParamTypes(), | ||||||
9411 | FPT->getExtProtoInfo().withExceptionSpec(EST_BasicNoexcept))); | ||||||
9412 | } | ||||||
9413 | |||||||
9414 | // Filter out previous declarations that don't match the scope. | ||||||
9415 | FilterLookupForScope(Previous, OriginalDC, S, shouldConsiderLinkage(NewFD), | ||||||
9416 | D.getCXXScopeSpec().isNotEmpty() || | ||||||
9417 | isMemberSpecialization || | ||||||
9418 | isFunctionTemplateSpecialization); | ||||||
9419 | |||||||
9420 | // Handle GNU asm-label extension (encoded as an attribute). | ||||||
9421 | if (Expr *E = (Expr*) D.getAsmLabel()) { | ||||||
9422 | // The parser guarantees this is a string. | ||||||
9423 | StringLiteral *SE = cast<StringLiteral>(E); | ||||||
9424 | NewFD->addAttr(AsmLabelAttr::Create(Context, SE->getString(), | ||||||
9425 | /*IsLiteralLabel=*/true, | ||||||
9426 | SE->getStrTokenLoc(0))); | ||||||
9427 | } else if (!ExtnameUndeclaredIdentifiers.empty()) { | ||||||
9428 | llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*>::iterator I = | ||||||
9429 | ExtnameUndeclaredIdentifiers.find(NewFD->getIdentifier()); | ||||||
9430 | if (I != ExtnameUndeclaredIdentifiers.end()) { | ||||||
9431 | if (isDeclExternC(NewFD)) { | ||||||
9432 | NewFD->addAttr(I->second); | ||||||
9433 | ExtnameUndeclaredIdentifiers.erase(I); | ||||||
9434 | } else | ||||||
9435 | Diag(NewFD->getLocation(), diag::warn_redefine_extname_not_applied) | ||||||
9436 | << /*Variable*/0 << NewFD; | ||||||
9437 | } | ||||||
9438 | } | ||||||
9439 | |||||||
9440 | // Copy the parameter declarations from the declarator D to the function | ||||||
9441 | // declaration NewFD, if they are available. First scavenge them into Params. | ||||||
9442 | SmallVector<ParmVarDecl*, 16> Params; | ||||||
9443 | unsigned FTIIdx; | ||||||
9444 | if (D.isFunctionDeclarator(FTIIdx)) { | ||||||
9445 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(FTIIdx).Fun; | ||||||
9446 | |||||||
9447 | // Check for C99 6.7.5.3p10 - foo(void) is a non-varargs | ||||||
9448 | // function that takes no arguments, not a function that takes a | ||||||
9449 | // single void argument. | ||||||
9450 | // We let through "const void" here because Sema::GetTypeForDeclarator | ||||||
9451 | // already checks for that case. | ||||||
9452 | if (FTIHasNonVoidParameters(FTI) && FTI.Params[0].Param) { | ||||||
9453 | for (unsigned i = 0, e = FTI.NumParams; i != e; ++i) { | ||||||
9454 | ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param); | ||||||
9455 | assert(Param->getDeclContext() != NewFD && "Was set before ?")(static_cast <bool> (Param->getDeclContext() != NewFD && "Was set before ?") ? void (0) : __assert_fail ("Param->getDeclContext() != NewFD && \"Was set before ?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9455, __extension__ __PRETTY_FUNCTION__)); | ||||||
9456 | Param->setDeclContext(NewFD); | ||||||
9457 | Params.push_back(Param); | ||||||
9458 | |||||||
9459 | if (Param->isInvalidDecl()) | ||||||
9460 | NewFD->setInvalidDecl(); | ||||||
9461 | } | ||||||
9462 | } | ||||||
9463 | |||||||
9464 | if (!getLangOpts().CPlusPlus) { | ||||||
9465 | // In C, find all the tag declarations from the prototype and move them | ||||||
9466 | // into the function DeclContext. Remove them from the surrounding tag | ||||||
9467 | // injection context of the function, which is typically but not always | ||||||
9468 | // the TU. | ||||||
9469 | DeclContext *PrototypeTagContext = | ||||||
9470 | getTagInjectionContext(NewFD->getLexicalDeclContext()); | ||||||
9471 | for (NamedDecl *NonParmDecl : FTI.getDeclsInPrototype()) { | ||||||
9472 | auto *TD = dyn_cast<TagDecl>(NonParmDecl); | ||||||
9473 | |||||||
9474 | // We don't want to reparent enumerators. Look at their parent enum | ||||||
9475 | // instead. | ||||||
9476 | if (!TD) { | ||||||
9477 | if (auto *ECD = dyn_cast<EnumConstantDecl>(NonParmDecl)) | ||||||
9478 | TD = cast<EnumDecl>(ECD->getDeclContext()); | ||||||
9479 | } | ||||||
9480 | if (!TD) | ||||||
9481 | continue; | ||||||
9482 | DeclContext *TagDC = TD->getLexicalDeclContext(); | ||||||
9483 | if (!TagDC->containsDecl(TD)) | ||||||
9484 | continue; | ||||||
9485 | TagDC->removeDecl(TD); | ||||||
9486 | TD->setDeclContext(NewFD); | ||||||
9487 | NewFD->addDecl(TD); | ||||||
9488 | |||||||
9489 | // Preserve the lexical DeclContext if it is not the surrounding tag | ||||||
9490 | // injection context of the FD. In this example, the semantic context of | ||||||
9491 | // E will be f and the lexical context will be S, while both the | ||||||
9492 | // semantic and lexical contexts of S will be f: | ||||||
9493 | // void f(struct S { enum E { a } f; } s); | ||||||
9494 | if (TagDC != PrototypeTagContext) | ||||||
9495 | TD->setLexicalDeclContext(TagDC); | ||||||
9496 | } | ||||||
9497 | } | ||||||
9498 | } else if (const FunctionProtoType *FT = R->getAs<FunctionProtoType>()) { | ||||||
9499 | // When we're declaring a function with a typedef, typeof, etc as in the | ||||||
9500 | // following example, we'll need to synthesize (unnamed) | ||||||
9501 | // parameters for use in the declaration. | ||||||
9502 | // | ||||||
9503 | // @code | ||||||
9504 | // typedef void fn(int); | ||||||
9505 | // fn f; | ||||||
9506 | // @endcode | ||||||
9507 | |||||||
9508 | // Synthesize a parameter for each argument type. | ||||||
9509 | for (const auto &AI : FT->param_types()) { | ||||||
9510 | ParmVarDecl *Param = | ||||||
9511 | BuildParmVarDeclForTypedef(NewFD, D.getIdentifierLoc(), AI); | ||||||
9512 | Param->setScopeInfo(0, Params.size()); | ||||||
9513 | Params.push_back(Param); | ||||||
9514 | } | ||||||
9515 | } else { | ||||||
9516 | assert(R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 &&(static_cast <bool> (R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && "Should not need args for typedef of non-prototype fn" ) ? void (0) : __assert_fail ("R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && \"Should not need args for typedef of non-prototype fn\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9517, __extension__ __PRETTY_FUNCTION__)) | ||||||
9517 | "Should not need args for typedef of non-prototype fn")(static_cast <bool> (R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && "Should not need args for typedef of non-prototype fn" ) ? void (0) : __assert_fail ("R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && \"Should not need args for typedef of non-prototype fn\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9517, __extension__ __PRETTY_FUNCTION__)); | ||||||
9518 | } | ||||||
9519 | |||||||
9520 | // Finally, we know we have the right number of parameters, install them. | ||||||
9521 | NewFD->setParams(Params); | ||||||
9522 | |||||||
9523 | if (D.getDeclSpec().isNoreturnSpecified()) | ||||||
9524 | NewFD->addAttr(C11NoReturnAttr::Create(Context, | ||||||
9525 | D.getDeclSpec().getNoreturnSpecLoc(), | ||||||
9526 | AttributeCommonInfo::AS_Keyword)); | ||||||
9527 | |||||||
9528 | // Functions returning a variably modified type violate C99 6.7.5.2p2 | ||||||
9529 | // because all functions have linkage. | ||||||
9530 | if (!NewFD->isInvalidDecl() && | ||||||
9531 | NewFD->getReturnType()->isVariablyModifiedType()) { | ||||||
9532 | Diag(NewFD->getLocation(), diag::err_vm_func_decl); | ||||||
9533 | NewFD->setInvalidDecl(); | ||||||
9534 | } | ||||||
9535 | |||||||
9536 | // Apply an implicit SectionAttr if '#pragma clang section text' is active | ||||||
9537 | if (PragmaClangTextSection.Valid && D.isFunctionDefinition() && | ||||||
9538 | !NewFD->hasAttr<SectionAttr>()) | ||||||
9539 | NewFD->addAttr(PragmaClangTextSectionAttr::CreateImplicit( | ||||||
9540 | Context, PragmaClangTextSection.SectionName, | ||||||
9541 | PragmaClangTextSection.PragmaLocation, AttributeCommonInfo::AS_Pragma)); | ||||||
9542 | |||||||
9543 | // Apply an implicit SectionAttr if #pragma code_seg is active. | ||||||
9544 | if (CodeSegStack.CurrentValue && D.isFunctionDefinition() && | ||||||
9545 | !NewFD->hasAttr<SectionAttr>()) { | ||||||
9546 | NewFD->addAttr(SectionAttr::CreateImplicit( | ||||||
9547 | Context, CodeSegStack.CurrentValue->getString(), | ||||||
9548 | CodeSegStack.CurrentPragmaLocation, AttributeCommonInfo::AS_Pragma, | ||||||
9549 | SectionAttr::Declspec_allocate)); | ||||||
9550 | if (UnifySection(CodeSegStack.CurrentValue->getString(), | ||||||
9551 | ASTContext::PSF_Implicit | ASTContext::PSF_Execute | | ||||||
9552 | ASTContext::PSF_Read, | ||||||
9553 | NewFD)) | ||||||
9554 | NewFD->dropAttr<SectionAttr>(); | ||||||
9555 | } | ||||||
9556 | |||||||
9557 | // Apply an implicit CodeSegAttr from class declspec or | ||||||
9558 | // apply an implicit SectionAttr from #pragma code_seg if active. | ||||||
9559 | if (!NewFD->hasAttr<CodeSegAttr>()) { | ||||||
9560 | if (Attr *SAttr = getImplicitCodeSegOrSectionAttrForFunction(NewFD, | ||||||
9561 | D.isFunctionDefinition())) { | ||||||
9562 | NewFD->addAttr(SAttr); | ||||||
9563 | } | ||||||
9564 | } | ||||||
9565 | |||||||
9566 | // Handle attributes. | ||||||
9567 | ProcessDeclAttributes(S, NewFD, D); | ||||||
9568 | |||||||
9569 | if (getLangOpts().OpenCL) { | ||||||
9570 | // OpenCL v1.1 s6.5: Using an address space qualifier in a function return | ||||||
9571 | // type declaration will generate a compilation error. | ||||||
9572 | LangAS AddressSpace = NewFD->getReturnType().getAddressSpace(); | ||||||
9573 | if (AddressSpace != LangAS::Default) { | ||||||
9574 | Diag(NewFD->getLocation(), | ||||||
9575 | diag::err_opencl_return_value_with_address_space); | ||||||
9576 | NewFD->setInvalidDecl(); | ||||||
9577 | } | ||||||
9578 | } | ||||||
9579 | |||||||
9580 | if (!getLangOpts().CPlusPlus) { | ||||||
9581 | // Perform semantic checking on the function declaration. | ||||||
9582 | if (!NewFD->isInvalidDecl() && NewFD->isMain()) | ||||||
9583 | CheckMain(NewFD, D.getDeclSpec()); | ||||||
9584 | |||||||
9585 | if (!NewFD->isInvalidDecl() && NewFD->isMSVCRTEntryPoint()) | ||||||
9586 | CheckMSVCRTEntryPoint(NewFD); | ||||||
9587 | |||||||
9588 | if (!NewFD->isInvalidDecl()) | ||||||
9589 | D.setRedeclaration(CheckFunctionDeclaration(S, NewFD, Previous, | ||||||
9590 | isMemberSpecialization)); | ||||||
9591 | else if (!Previous.empty()) | ||||||
9592 | // Recover gracefully from an invalid redeclaration. | ||||||
9593 | D.setRedeclaration(true); | ||||||
9594 | assert((NewFD->isInvalidDecl() || !D.isRedeclaration() ||(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9596, __extension__ __PRETTY_FUNCTION__)) | ||||||
9595 | Previous.getResultKind() != LookupResult::FoundOverloaded) &&(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9596, __extension__ __PRETTY_FUNCTION__)) | ||||||
9596 | "previous declaration set still overloaded")(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9596, __extension__ __PRETTY_FUNCTION__)); | ||||||
9597 | |||||||
9598 | // Diagnose no-prototype function declarations with calling conventions that | ||||||
9599 | // don't support variadic calls. Only do this in C and do it after merging | ||||||
9600 | // possibly prototyped redeclarations. | ||||||
9601 | const FunctionType *FT = NewFD->getType()->castAs<FunctionType>(); | ||||||
9602 | if (isa<FunctionNoProtoType>(FT) && !D.isFunctionDefinition()) { | ||||||
9603 | CallingConv CC = FT->getExtInfo().getCC(); | ||||||
9604 | if (!supportsVariadicCall(CC)) { | ||||||
9605 | // Windows system headers sometimes accidentally use stdcall without | ||||||
9606 | // (void) parameters, so we relax this to a warning. | ||||||
9607 | int DiagID = | ||||||
9608 | CC == CC_X86StdCall ? diag::warn_cconv_knr : diag::err_cconv_knr; | ||||||
9609 | Diag(NewFD->getLocation(), DiagID) | ||||||
9610 | << FunctionType::getNameForCallConv(CC); | ||||||
9611 | } | ||||||
9612 | } | ||||||
9613 | |||||||
9614 | if (NewFD->getReturnType().hasNonTrivialToPrimitiveDestructCUnion() || | ||||||
9615 | NewFD->getReturnType().hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
9616 | checkNonTrivialCUnion(NewFD->getReturnType(), | ||||||
9617 | NewFD->getReturnTypeSourceRange().getBegin(), | ||||||
9618 | NTCUC_FunctionReturn, NTCUK_Destruct|NTCUK_Copy); | ||||||
9619 | } else { | ||||||
9620 | // C++11 [replacement.functions]p3: | ||||||
9621 | // The program's definitions shall not be specified as inline. | ||||||
9622 | // | ||||||
9623 | // N.B. We diagnose declarations instead of definitions per LWG issue 2340. | ||||||
9624 | // | ||||||
9625 | // Suppress the diagnostic if the function is __attribute__((used)), since | ||||||
9626 | // that forces an external definition to be emitted. | ||||||
9627 | if (D.getDeclSpec().isInlineSpecified() && | ||||||
9628 | NewFD->isReplaceableGlobalAllocationFunction() && | ||||||
9629 | !NewFD->hasAttr<UsedAttr>()) | ||||||
9630 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
9631 | diag::ext_operator_new_delete_declared_inline) | ||||||
9632 | << NewFD->getDeclName(); | ||||||
9633 | |||||||
9634 | // If the declarator is a template-id, translate the parser's template | ||||||
9635 | // argument list into our AST format. | ||||||
9636 | if (D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId) { | ||||||
9637 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; | ||||||
9638 | TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc); | ||||||
9639 | TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc); | ||||||
9640 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), | ||||||
9641 | TemplateId->NumArgs); | ||||||
9642 | translateTemplateArguments(TemplateArgsPtr, | ||||||
9643 | TemplateArgs); | ||||||
9644 | |||||||
9645 | HasExplicitTemplateArgs = true; | ||||||
9646 | |||||||
9647 | if (NewFD->isInvalidDecl()) { | ||||||
9648 | HasExplicitTemplateArgs = false; | ||||||
9649 | } else if (FunctionTemplate) { | ||||||
9650 | // Function template with explicit template arguments. | ||||||
9651 | Diag(D.getIdentifierLoc(), diag::err_function_template_partial_spec) | ||||||
9652 | << SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc); | ||||||
9653 | |||||||
9654 | HasExplicitTemplateArgs = false; | ||||||
9655 | } else { | ||||||
9656 | assert((isFunctionTemplateSpecialization ||(static_cast <bool> ((isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9658, __extension__ __PRETTY_FUNCTION__)) | ||||||
9657 | D.getDeclSpec().isFriendSpecified()) &&(static_cast <bool> ((isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9658, __extension__ __PRETTY_FUNCTION__)) | ||||||
9658 | "should have a 'template<>' for this decl")(static_cast <bool> ((isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9658, __extension__ __PRETTY_FUNCTION__)); | ||||||
9659 | // "friend void foo<>(int);" is an implicit specialization decl. | ||||||
9660 | isFunctionTemplateSpecialization = true; | ||||||
9661 | } | ||||||
9662 | } else if (isFriend && isFunctionTemplateSpecialization) { | ||||||
9663 | // This combination is only possible in a recovery case; the user | ||||||
9664 | // wrote something like: | ||||||
9665 | // template <> friend void foo(int); | ||||||
9666 | // which we're recovering from as if the user had written: | ||||||
9667 | // friend void foo<>(int); | ||||||
9668 | // Go ahead and fake up a template id. | ||||||
9669 | HasExplicitTemplateArgs = true; | ||||||
9670 | TemplateArgs.setLAngleLoc(D.getIdentifierLoc()); | ||||||
9671 | TemplateArgs.setRAngleLoc(D.getIdentifierLoc()); | ||||||
9672 | } | ||||||
9673 | |||||||
9674 | // We do not add HD attributes to specializations here because | ||||||
9675 | // they may have different constexpr-ness compared to their | ||||||
9676 | // templates and, after maybeAddCUDAHostDeviceAttrs() is applied, | ||||||
9677 | // may end up with different effective targets. Instead, a | ||||||
9678 | // specialization inherits its target attributes from its template | ||||||
9679 | // in the CheckFunctionTemplateSpecialization() call below. | ||||||
9680 | if (getLangOpts().CUDA && !isFunctionTemplateSpecialization) | ||||||
9681 | maybeAddCUDAHostDeviceAttrs(NewFD, Previous); | ||||||
9682 | |||||||
9683 | // If it's a friend (and only if it's a friend), it's possible | ||||||
9684 | // that either the specialized function type or the specialized | ||||||
9685 | // template is dependent, and therefore matching will fail. In | ||||||
9686 | // this case, don't check the specialization yet. | ||||||
9687 | if (isFunctionTemplateSpecialization && isFriend && | ||||||
9688 | (NewFD->getType()->isDependentType() || DC->isDependentContext() || | ||||||
9689 | TemplateSpecializationType::anyInstantiationDependentTemplateArguments( | ||||||
9690 | TemplateArgs.arguments()))) { | ||||||
9691 | assert(HasExplicitTemplateArgs &&(static_cast <bool> (HasExplicitTemplateArgs && "friend function specialization without template args") ? void (0) : __assert_fail ("HasExplicitTemplateArgs && \"friend function specialization without template args\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9692, __extension__ __PRETTY_FUNCTION__)) | ||||||
9692 | "friend function specialization without template args")(static_cast <bool> (HasExplicitTemplateArgs && "friend function specialization without template args") ? void (0) : __assert_fail ("HasExplicitTemplateArgs && \"friend function specialization without template args\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9692, __extension__ __PRETTY_FUNCTION__)); | ||||||
9693 | if (CheckDependentFunctionTemplateSpecialization(NewFD, TemplateArgs, | ||||||
9694 | Previous)) | ||||||
9695 | NewFD->setInvalidDecl(); | ||||||
9696 | } else if (isFunctionTemplateSpecialization) { | ||||||
9697 | if (CurContext->isDependentContext() && CurContext->isRecord() | ||||||
9698 | && !isFriend) { | ||||||
9699 | isDependentClassScopeExplicitSpecialization = true; | ||||||
9700 | } else if (!NewFD->isInvalidDecl() && | ||||||
9701 | CheckFunctionTemplateSpecialization( | ||||||
9702 | NewFD, (HasExplicitTemplateArgs ? &TemplateArgs : nullptr), | ||||||
9703 | Previous)) | ||||||
9704 | NewFD->setInvalidDecl(); | ||||||
9705 | |||||||
9706 | // C++ [dcl.stc]p1: | ||||||
9707 | // A storage-class-specifier shall not be specified in an explicit | ||||||
9708 | // specialization (14.7.3) | ||||||
9709 | FunctionTemplateSpecializationInfo *Info = | ||||||
9710 | NewFD->getTemplateSpecializationInfo(); | ||||||
9711 | if (Info && SC != SC_None) { | ||||||
9712 | if (SC != Info->getTemplate()->getTemplatedDecl()->getStorageClass()) | ||||||
9713 | Diag(NewFD->getLocation(), | ||||||
9714 | diag::err_explicit_specialization_inconsistent_storage_class) | ||||||
9715 | << SC | ||||||
9716 | << FixItHint::CreateRemoval( | ||||||
9717 | D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
9718 | |||||||
9719 | else | ||||||
9720 | Diag(NewFD->getLocation(), | ||||||
9721 | diag::ext_explicit_specialization_storage_class) | ||||||
9722 | << FixItHint::CreateRemoval( | ||||||
9723 | D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
9724 | } | ||||||
9725 | } else if (isMemberSpecialization && isa<CXXMethodDecl>(NewFD)) { | ||||||
9726 | if (CheckMemberSpecialization(NewFD, Previous)) | ||||||
9727 | NewFD->setInvalidDecl(); | ||||||
9728 | } | ||||||
9729 | |||||||
9730 | // Perform semantic checking on the function declaration. | ||||||
9731 | if (!isDependentClassScopeExplicitSpecialization) { | ||||||
9732 | if (!NewFD->isInvalidDecl() && NewFD->isMain()) | ||||||
9733 | CheckMain(NewFD, D.getDeclSpec()); | ||||||
9734 | |||||||
9735 | if (!NewFD->isInvalidDecl() && NewFD->isMSVCRTEntryPoint()) | ||||||
9736 | CheckMSVCRTEntryPoint(NewFD); | ||||||
9737 | |||||||
9738 | if (!NewFD->isInvalidDecl()) | ||||||
9739 | D.setRedeclaration(CheckFunctionDeclaration(S, NewFD, Previous, | ||||||
9740 | isMemberSpecialization)); | ||||||
9741 | else if (!Previous.empty()) | ||||||
9742 | // Recover gracefully from an invalid redeclaration. | ||||||
9743 | D.setRedeclaration(true); | ||||||
9744 | } | ||||||
9745 | |||||||
9746 | assert((NewFD->isInvalidDecl() || !D.isRedeclaration() ||(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9748, __extension__ __PRETTY_FUNCTION__)) | ||||||
9747 | Previous.getResultKind() != LookupResult::FoundOverloaded) &&(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9748, __extension__ __PRETTY_FUNCTION__)) | ||||||
9748 | "previous declaration set still overloaded")(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 9748, __extension__ __PRETTY_FUNCTION__)); | ||||||
9749 | |||||||
9750 | NamedDecl *PrincipalDecl = (FunctionTemplate | ||||||
9751 | ? cast<NamedDecl>(FunctionTemplate) | ||||||
9752 | : NewFD); | ||||||
9753 | |||||||
9754 | if (isFriend && NewFD->getPreviousDecl()) { | ||||||
9755 | AccessSpecifier Access = AS_public; | ||||||
9756 | if (!NewFD->isInvalidDecl()) | ||||||
9757 | Access = NewFD->getPreviousDecl()->getAccess(); | ||||||
9758 | |||||||
9759 | NewFD->setAccess(Access); | ||||||
9760 | if (FunctionTemplate) FunctionTemplate->setAccess(Access); | ||||||
9761 | } | ||||||
9762 | |||||||
9763 | if (NewFD->isOverloadedOperator() && !DC->isRecord() && | ||||||
9764 | PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary)) | ||||||
9765 | PrincipalDecl->setNonMemberOperator(); | ||||||
9766 | |||||||
9767 | // If we have a function template, check the template parameter | ||||||
9768 | // list. This will check and merge default template arguments. | ||||||
9769 | if (FunctionTemplate) { | ||||||
9770 | FunctionTemplateDecl *PrevTemplate = | ||||||
9771 | FunctionTemplate->getPreviousDecl(); | ||||||
9772 | CheckTemplateParameterList(FunctionTemplate->getTemplateParameters(), | ||||||
9773 | PrevTemplate ? PrevTemplate->getTemplateParameters() | ||||||
9774 | : nullptr, | ||||||
9775 | D.getDeclSpec().isFriendSpecified() | ||||||
9776 | ? (D.isFunctionDefinition() | ||||||
9777 | ? TPC_FriendFunctionTemplateDefinition | ||||||
9778 | : TPC_FriendFunctionTemplate) | ||||||
9779 | : (D.getCXXScopeSpec().isSet() && | ||||||
9780 | DC && DC->isRecord() && | ||||||
9781 | DC->isDependentContext()) | ||||||
9782 | ? TPC_ClassTemplateMember | ||||||
9783 | : TPC_FunctionTemplate); | ||||||
9784 | } | ||||||
9785 | |||||||
9786 | if (NewFD->isInvalidDecl()) { | ||||||
9787 | // Ignore all the rest of this. | ||||||
9788 | } else if (!D.isRedeclaration()) { | ||||||
9789 | struct ActOnFDArgs ExtraArgs = { S, D, TemplateParamLists, | ||||||
9790 | AddToScope }; | ||||||
9791 | // Fake up an access specifier if it's supposed to be a class member. | ||||||
9792 | if (isa<CXXRecordDecl>(NewFD->getDeclContext())) | ||||||
9793 | NewFD->setAccess(AS_public); | ||||||
9794 | |||||||
9795 | // Qualified decls generally require a previous declaration. | ||||||
9796 | if (D.getCXXScopeSpec().isSet()) { | ||||||
9797 | // ...with the major exception of templated-scope or | ||||||
9798 | // dependent-scope friend declarations. | ||||||
9799 | |||||||
9800 | // TODO: we currently also suppress this check in dependent | ||||||
9801 | // contexts because (1) the parameter depth will be off when | ||||||
9802 | // matching friend templates and (2) we might actually be | ||||||
9803 | // selecting a friend based on a dependent factor. But there | ||||||
9804 | // are situations where these conditions don't apply and we | ||||||
9805 | // can actually do this check immediately. | ||||||
9806 | // | ||||||
9807 | // Unless the scope is dependent, it's always an error if qualified | ||||||
9808 | // redeclaration lookup found nothing at all. Diagnose that now; | ||||||
9809 | // nothing will diagnose that error later. | ||||||
9810 | if (isFriend && | ||||||
9811 | (D.getCXXScopeSpec().getScopeRep()->isDependent() || | ||||||
9812 | (!Previous.empty() && CurContext->isDependentContext()))) { | ||||||
9813 | // ignore these | ||||||
9814 | } else if (NewFD->isCPUDispatchMultiVersion() || | ||||||
9815 | NewFD->isCPUSpecificMultiVersion()) { | ||||||
9816 | // ignore this, we allow the redeclaration behavior here to create new | ||||||
9817 | // versions of the function. | ||||||
9818 | } else { | ||||||
9819 | // The user tried to provide an out-of-line definition for a | ||||||
9820 | // function that is a member of a class or namespace, but there | ||||||
9821 | // was no such member function declared (C++ [class.mfct]p2, | ||||||
9822 | // C++ [namespace.memdef]p2). For example: | ||||||
9823 | // | ||||||
9824 | // class X { | ||||||
9825 | // void f() const; | ||||||
9826 | // }; | ||||||
9827 | // | ||||||
9828 | // void X::f() { } // ill-formed | ||||||
9829 | // | ||||||
9830 | // Complain about this problem, and attempt to suggest close | ||||||
9831 | // matches (e.g., those that differ only in cv-qualifiers and | ||||||
9832 | // whether the parameter types are references). | ||||||
9833 | |||||||
9834 | if (NamedDecl *Result = DiagnoseInvalidRedeclaration( | ||||||
9835 | *this, Previous, NewFD, ExtraArgs, false, nullptr)) { | ||||||
9836 | AddToScope = ExtraArgs.AddToScope; | ||||||
9837 | return Result; | ||||||
9838 | } | ||||||
9839 | } | ||||||
9840 | |||||||
9841 | // Unqualified local friend declarations are required to resolve | ||||||
9842 | // to something. | ||||||
9843 | } else if (isFriend && cast<CXXRecordDecl>(CurContext)->isLocalClass()) { | ||||||
9844 | if (NamedDecl *Result = DiagnoseInvalidRedeclaration( | ||||||
9845 | *this, Previous, NewFD, ExtraArgs, true, S)) { | ||||||
9846 | AddToScope = ExtraArgs.AddToScope; | ||||||
9847 | return Result; | ||||||
9848 | } | ||||||
9849 | } | ||||||
9850 | } else if (!D.isFunctionDefinition() && | ||||||
9851 | isa<CXXMethodDecl>(NewFD) && NewFD->isOutOfLine() && | ||||||
9852 | !isFriend && !isFunctionTemplateSpecialization && | ||||||
9853 | !isMemberSpecialization) { | ||||||
9854 | // An out-of-line member function declaration must also be a | ||||||
9855 | // definition (C++ [class.mfct]p2). | ||||||
9856 | // Note that this is not the case for explicit specializations of | ||||||
9857 | // function templates or member functions of class templates, per | ||||||
9858 | // C++ [temp.expl.spec]p2. We also allow these declarations as an | ||||||
9859 | // extension for compatibility with old SWIG code which likes to | ||||||
9860 | // generate them. | ||||||
9861 | Diag(NewFD->getLocation(), diag::ext_out_of_line_declaration) | ||||||
9862 | << D.getCXXScopeSpec().getRange(); | ||||||
9863 | } | ||||||
9864 | } | ||||||
9865 | |||||||
9866 | // If this is the first declaration of a library builtin function, add | ||||||
9867 | // attributes as appropriate. | ||||||
9868 | if (!D.isRedeclaration() && | ||||||
9869 | NewFD->getDeclContext()->getRedeclContext()->isFileContext()) { | ||||||
9870 | if (IdentifierInfo *II = Previous.getLookupName().getAsIdentifierInfo()) { | ||||||
9871 | if (unsigned BuiltinID = II->getBuiltinID()) { | ||||||
9872 | if (NewFD->getLanguageLinkage() == CLanguageLinkage) { | ||||||
9873 | // Validate the type matches unless this builtin is specified as | ||||||
9874 | // matching regardless of its declared type. | ||||||
9875 | if (Context.BuiltinInfo.allowTypeMismatch(BuiltinID)) { | ||||||
9876 | NewFD->addAttr(BuiltinAttr::CreateImplicit(Context, BuiltinID)); | ||||||
9877 | } else { | ||||||
9878 | ASTContext::GetBuiltinTypeError Error; | ||||||
9879 | LookupNecessaryTypesForBuiltin(S, BuiltinID); | ||||||
9880 | QualType BuiltinType = Context.GetBuiltinType(BuiltinID, Error); | ||||||
9881 | |||||||
9882 | if (!Error && !BuiltinType.isNull() && | ||||||
9883 | Context.hasSameFunctionTypeIgnoringExceptionSpec( | ||||||
9884 | NewFD->getType(), BuiltinType)) | ||||||
9885 | NewFD->addAttr(BuiltinAttr::CreateImplicit(Context, BuiltinID)); | ||||||
9886 | } | ||||||
9887 | } else if (BuiltinID == Builtin::BI__GetExceptionInfo && | ||||||
9888 | Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
9889 | // FIXME: We should consider this a builtin only in the std namespace. | ||||||
9890 | NewFD->addAttr(BuiltinAttr::CreateImplicit(Context, BuiltinID)); | ||||||
9891 | } | ||||||
9892 | } | ||||||
9893 | } | ||||||
9894 | } | ||||||
9895 | |||||||
9896 | ProcessPragmaWeak(S, NewFD); | ||||||
9897 | checkAttributesAfterMerging(*this, *NewFD); | ||||||
9898 | |||||||
9899 | AddKnownFunctionAttributes(NewFD); | ||||||
9900 | |||||||
9901 | if (NewFD->hasAttr<OverloadableAttr>() && | ||||||
9902 | !NewFD->getType()->getAs<FunctionProtoType>()) { | ||||||
9903 | Diag(NewFD->getLocation(), | ||||||
9904 | diag::err_attribute_overloadable_no_prototype) | ||||||
9905 | << NewFD; | ||||||
9906 | |||||||
9907 | // Turn this into a variadic function with no parameters. | ||||||
9908 | const FunctionType *FT = NewFD->getType()->getAs<FunctionType>(); | ||||||
9909 | FunctionProtoType::ExtProtoInfo EPI( | ||||||
9910 | Context.getDefaultCallingConvention(true, false)); | ||||||
9911 | EPI.Variadic = true; | ||||||
9912 | EPI.ExtInfo = FT->getExtInfo(); | ||||||
9913 | |||||||
9914 | QualType R = Context.getFunctionType(FT->getReturnType(), None, EPI); | ||||||
9915 | NewFD->setType(R); | ||||||
9916 | } | ||||||
9917 | |||||||
9918 | // If there's a #pragma GCC visibility in scope, and this isn't a class | ||||||
9919 | // member, set the visibility of this function. | ||||||
9920 | if (!DC->isRecord() && NewFD->isExternallyVisible()) | ||||||
9921 | AddPushedVisibilityAttribute(NewFD); | ||||||
9922 | |||||||
9923 | // If there's a #pragma clang arc_cf_code_audited in scope, consider | ||||||
9924 | // marking the function. | ||||||
9925 | AddCFAuditedAttribute(NewFD); | ||||||
9926 | |||||||
9927 | // If this is a function definition, check if we have to apply optnone due to | ||||||
9928 | // a pragma. | ||||||
9929 | if(D.isFunctionDefinition()) | ||||||
9930 | AddRangeBasedOptnone(NewFD); | ||||||
9931 | |||||||
9932 | // If this is the first declaration of an extern C variable, update | ||||||
9933 | // the map of such variables. | ||||||
9934 | if (NewFD->isFirstDecl() && !NewFD->isInvalidDecl() && | ||||||
9935 | isIncompleteDeclExternC(*this, NewFD)) | ||||||
9936 | RegisterLocallyScopedExternCDecl(NewFD, S); | ||||||
9937 | |||||||
9938 | // Set this FunctionDecl's range up to the right paren. | ||||||
9939 | NewFD->setRangeEnd(D.getSourceRange().getEnd()); | ||||||
9940 | |||||||
9941 | if (D.isRedeclaration() && !Previous.empty()) { | ||||||
9942 | NamedDecl *Prev = Previous.getRepresentativeDecl(); | ||||||
9943 | checkDLLAttributeRedeclaration(*this, Prev, NewFD, | ||||||
9944 | isMemberSpecialization || | ||||||
9945 | isFunctionTemplateSpecialization, | ||||||
9946 | D.isFunctionDefinition()); | ||||||
9947 | } | ||||||
9948 | |||||||
9949 | if (getLangOpts().CUDA) { | ||||||
9950 | IdentifierInfo *II = NewFD->getIdentifier(); | ||||||
9951 | if (II && II->isStr(getCudaConfigureFuncName()) && | ||||||
9952 | !NewFD->isInvalidDecl() && | ||||||
9953 | NewFD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { | ||||||
9954 | if (!R->castAs<FunctionType>()->getReturnType()->isScalarType()) | ||||||
9955 | Diag(NewFD->getLocation(), diag::err_config_scalar_return) | ||||||
9956 | << getCudaConfigureFuncName(); | ||||||
9957 | Context.setcudaConfigureCallDecl(NewFD); | ||||||
9958 | } | ||||||
9959 | |||||||
9960 | // Variadic functions, other than a *declaration* of printf, are not allowed | ||||||
9961 | // in device-side CUDA code, unless someone passed | ||||||
9962 | // -fcuda-allow-variadic-functions. | ||||||
9963 | if (!getLangOpts().CUDAAllowVariadicFunctions && NewFD->isVariadic() && | ||||||
9964 | (NewFD->hasAttr<CUDADeviceAttr>() || | ||||||
9965 | NewFD->hasAttr<CUDAGlobalAttr>()) && | ||||||
9966 | !(II && II->isStr("printf") && NewFD->isExternC() && | ||||||
9967 | !D.isFunctionDefinition())) { | ||||||
9968 | Diag(NewFD->getLocation(), diag::err_variadic_device_fn); | ||||||
9969 | } | ||||||
9970 | } | ||||||
9971 | |||||||
9972 | MarkUnusedFileScopedDecl(NewFD); | ||||||
9973 | |||||||
9974 | |||||||
9975 | |||||||
9976 | if (getLangOpts().OpenCL && NewFD->hasAttr<OpenCLKernelAttr>()) { | ||||||
9977 | // OpenCL v1.2 s6.8 static is invalid for kernel functions. | ||||||
9978 | if (SC == SC_Static) { | ||||||
9979 | Diag(D.getIdentifierLoc(), diag::err_static_kernel); | ||||||
9980 | D.setInvalidType(); | ||||||
9981 | } | ||||||
9982 | |||||||
9983 | // OpenCL v1.2, s6.9 -- Kernels can only have return type void. | ||||||
9984 | if (!NewFD->getReturnType()->isVoidType()) { | ||||||
9985 | SourceRange RTRange = NewFD->getReturnTypeSourceRange(); | ||||||
9986 | Diag(D.getIdentifierLoc(), diag::err_expected_kernel_void_return_type) | ||||||
9987 | << (RTRange.isValid() ? FixItHint::CreateReplacement(RTRange, "void") | ||||||
9988 | : FixItHint()); | ||||||
9989 | D.setInvalidType(); | ||||||
9990 | } | ||||||
9991 | |||||||
9992 | llvm::SmallPtrSet<const Type *, 16> ValidTypes; | ||||||
9993 | for (auto Param : NewFD->parameters()) | ||||||
9994 | checkIsValidOpenCLKernelParameter(*this, D, Param, ValidTypes); | ||||||
9995 | |||||||
9996 | if (getLangOpts().OpenCLCPlusPlus) { | ||||||
9997 | if (DC->isRecord()) { | ||||||
9998 | Diag(D.getIdentifierLoc(), diag::err_method_kernel); | ||||||
9999 | D.setInvalidType(); | ||||||
10000 | } | ||||||
10001 | if (FunctionTemplate) { | ||||||
10002 | Diag(D.getIdentifierLoc(), diag::err_template_kernel); | ||||||
10003 | D.setInvalidType(); | ||||||
10004 | } | ||||||
10005 | } | ||||||
10006 | } | ||||||
10007 | |||||||
10008 | if (getLangOpts().CPlusPlus) { | ||||||
10009 | if (FunctionTemplate) { | ||||||
10010 | if (NewFD->isInvalidDecl()) | ||||||
10011 | FunctionTemplate->setInvalidDecl(); | ||||||
10012 | return FunctionTemplate; | ||||||
10013 | } | ||||||
10014 | |||||||
10015 | if (isMemberSpecialization && !NewFD->isInvalidDecl()) | ||||||
10016 | CompleteMemberSpecialization(NewFD, Previous); | ||||||
10017 | } | ||||||
10018 | |||||||
10019 | for (const ParmVarDecl *Param : NewFD->parameters()) { | ||||||
10020 | QualType PT = Param->getType(); | ||||||
10021 | |||||||
10022 | // OpenCL 2.0 pipe restrictions forbids pipe packet types to be non-value | ||||||
10023 | // types. | ||||||
10024 | if (getLangOpts().getOpenCLCompatibleVersion() >= 200) { | ||||||
10025 | if(const PipeType *PipeTy = PT->getAs<PipeType>()) { | ||||||
10026 | QualType ElemTy = PipeTy->getElementType(); | ||||||
10027 | if (ElemTy->isReferenceType() || ElemTy->isPointerType()) { | ||||||
10028 | Diag(Param->getTypeSpecStartLoc(), diag::err_reference_pipe_type ); | ||||||
10029 | D.setInvalidType(); | ||||||
10030 | } | ||||||
10031 | } | ||||||
10032 | } | ||||||
10033 | } | ||||||
10034 | |||||||
10035 | // Here we have an function template explicit specialization at class scope. | ||||||
10036 | // The actual specialization will be postponed to template instatiation | ||||||
10037 | // time via the ClassScopeFunctionSpecializationDecl node. | ||||||
10038 | if (isDependentClassScopeExplicitSpecialization) { | ||||||
10039 | ClassScopeFunctionSpecializationDecl *NewSpec = | ||||||
10040 | ClassScopeFunctionSpecializationDecl::Create( | ||||||
10041 | Context, CurContext, NewFD->getLocation(), | ||||||
10042 | cast<CXXMethodDecl>(NewFD), | ||||||
10043 | HasExplicitTemplateArgs, TemplateArgs); | ||||||
10044 | CurContext->addDecl(NewSpec); | ||||||
10045 | AddToScope = false; | ||||||
10046 | } | ||||||
10047 | |||||||
10048 | // Diagnose availability attributes. Availability cannot be used on functions | ||||||
10049 | // that are run during load/unload. | ||||||
10050 | if (const auto *attr = NewFD->getAttr<AvailabilityAttr>()) { | ||||||
10051 | if (NewFD->hasAttr<ConstructorAttr>()) { | ||||||
10052 | Diag(attr->getLocation(), diag::warn_availability_on_static_initializer) | ||||||
10053 | << 1; | ||||||
10054 | NewFD->dropAttr<AvailabilityAttr>(); | ||||||
10055 | } | ||||||
10056 | if (NewFD->hasAttr<DestructorAttr>()) { | ||||||
10057 | Diag(attr->getLocation(), diag::warn_availability_on_static_initializer) | ||||||
10058 | << 2; | ||||||
10059 | NewFD->dropAttr<AvailabilityAttr>(); | ||||||
10060 | } | ||||||
10061 | } | ||||||
10062 | |||||||
10063 | // Diagnose no_builtin attribute on function declaration that are not a | ||||||
10064 | // definition. | ||||||
10065 | // FIXME: We should really be doing this in | ||||||
10066 | // SemaDeclAttr.cpp::handleNoBuiltinAttr, unfortunately we only have access to | ||||||
10067 | // the FunctionDecl and at this point of the code | ||||||
10068 | // FunctionDecl::isThisDeclarationADefinition() which always returns `false` | ||||||
10069 | // because Sema::ActOnStartOfFunctionDef has not been called yet. | ||||||
10070 | if (const auto *NBA = NewFD->getAttr<NoBuiltinAttr>()) | ||||||
10071 | switch (D.getFunctionDefinitionKind()) { | ||||||
10072 | case FunctionDefinitionKind::Defaulted: | ||||||
10073 | case FunctionDefinitionKind::Deleted: | ||||||
10074 | Diag(NBA->getLocation(), | ||||||
10075 | diag::err_attribute_no_builtin_on_defaulted_deleted_function) | ||||||
10076 | << NBA->getSpelling(); | ||||||
10077 | break; | ||||||
10078 | case FunctionDefinitionKind::Declaration: | ||||||
10079 | Diag(NBA->getLocation(), diag::err_attribute_no_builtin_on_non_definition) | ||||||
10080 | << NBA->getSpelling(); | ||||||
10081 | break; | ||||||
10082 | case FunctionDefinitionKind::Definition: | ||||||
10083 | break; | ||||||
10084 | } | ||||||
10085 | |||||||
10086 | return NewFD; | ||||||
10087 | } | ||||||
10088 | |||||||
10089 | /// Return a CodeSegAttr from a containing class. The Microsoft docs say | ||||||
10090 | /// when __declspec(code_seg) "is applied to a class, all member functions of | ||||||
10091 | /// the class and nested classes -- this includes compiler-generated special | ||||||
10092 | /// member functions -- are put in the specified segment." | ||||||
10093 | /// The actual behavior is a little more complicated. The Microsoft compiler | ||||||
10094 | /// won't check outer classes if there is an active value from #pragma code_seg. | ||||||
10095 | /// The CodeSeg is always applied from the direct parent but only from outer | ||||||
10096 | /// classes when the #pragma code_seg stack is empty. See: | ||||||
10097 | /// https://reviews.llvm.org/D22931, the Microsoft feedback page is no longer | ||||||
10098 | /// available since MS has removed the page. | ||||||
10099 | static Attr *getImplicitCodeSegAttrFromClass(Sema &S, const FunctionDecl *FD) { | ||||||
10100 | const auto *Method = dyn_cast<CXXMethodDecl>(FD); | ||||||
10101 | if (!Method) | ||||||
10102 | return nullptr; | ||||||
10103 | const CXXRecordDecl *Parent = Method->getParent(); | ||||||
10104 | if (const auto *SAttr = Parent->getAttr<CodeSegAttr>()) { | ||||||
10105 | Attr *NewAttr = SAttr->clone(S.getASTContext()); | ||||||
10106 | NewAttr->setImplicit(true); | ||||||
10107 | return NewAttr; | ||||||
10108 | } | ||||||
10109 | |||||||
10110 | // The Microsoft compiler won't check outer classes for the CodeSeg | ||||||
10111 | // when the #pragma code_seg stack is active. | ||||||
10112 | if (S.CodeSegStack.CurrentValue) | ||||||
10113 | return nullptr; | ||||||
10114 | |||||||
10115 | while ((Parent = dyn_cast<CXXRecordDecl>(Parent->getParent()))) { | ||||||
10116 | if (const auto *SAttr = Parent->getAttr<CodeSegAttr>()) { | ||||||
10117 | Attr *NewAttr = SAttr->clone(S.getASTContext()); | ||||||
10118 | NewAttr->setImplicit(true); | ||||||
10119 | return NewAttr; | ||||||
10120 | } | ||||||
10121 | } | ||||||
10122 | return nullptr; | ||||||
10123 | } | ||||||
10124 | |||||||
10125 | /// Returns an implicit CodeSegAttr if a __declspec(code_seg) is found on a | ||||||
10126 | /// containing class. Otherwise it will return implicit SectionAttr if the | ||||||
10127 | /// function is a definition and there is an active value on CodeSegStack | ||||||
10128 | /// (from the current #pragma code-seg value). | ||||||
10129 | /// | ||||||
10130 | /// \param FD Function being declared. | ||||||
10131 | /// \param IsDefinition Whether it is a definition or just a declarartion. | ||||||
10132 | /// \returns A CodeSegAttr or SectionAttr to apply to the function or | ||||||
10133 | /// nullptr if no attribute should be added. | ||||||
10134 | Attr *Sema::getImplicitCodeSegOrSectionAttrForFunction(const FunctionDecl *FD, | ||||||
10135 | bool IsDefinition) { | ||||||
10136 | if (Attr *A = getImplicitCodeSegAttrFromClass(*this, FD)) | ||||||
10137 | return A; | ||||||
10138 | if (!FD->hasAttr<SectionAttr>() && IsDefinition && | ||||||
10139 | CodeSegStack.CurrentValue) | ||||||
10140 | return SectionAttr::CreateImplicit( | ||||||
10141 | getASTContext(), CodeSegStack.CurrentValue->getString(), | ||||||
10142 | CodeSegStack.CurrentPragmaLocation, AttributeCommonInfo::AS_Pragma, | ||||||
10143 | SectionAttr::Declspec_allocate); | ||||||
10144 | return nullptr; | ||||||
10145 | } | ||||||
10146 | |||||||
10147 | /// Determines if we can perform a correct type check for \p D as a | ||||||
10148 | /// redeclaration of \p PrevDecl. If not, we can generally still perform a | ||||||
10149 | /// best-effort check. | ||||||
10150 | /// | ||||||
10151 | /// \param NewD The new declaration. | ||||||
10152 | /// \param OldD The old declaration. | ||||||
10153 | /// \param NewT The portion of the type of the new declaration to check. | ||||||
10154 | /// \param OldT The portion of the type of the old declaration to check. | ||||||
10155 | bool Sema::canFullyTypeCheckRedeclaration(ValueDecl *NewD, ValueDecl *OldD, | ||||||
10156 | QualType NewT, QualType OldT) { | ||||||
10157 | if (!NewD->getLexicalDeclContext()->isDependentContext()) | ||||||
10158 | return true; | ||||||
10159 | |||||||
10160 | // For dependently-typed local extern declarations and friends, we can't | ||||||
10161 | // perform a correct type check in general until instantiation: | ||||||
10162 | // | ||||||
10163 | // int f(); | ||||||
10164 | // template<typename T> void g() { T f(); } | ||||||
10165 | // | ||||||
10166 | // (valid if g() is only instantiated with T = int). | ||||||
10167 | if (NewT->isDependentType() && | ||||||
10168 | (NewD->isLocalExternDecl() || NewD->getFriendObjectKind())) | ||||||
10169 | return false; | ||||||
10170 | |||||||
10171 | // Similarly, if the previous declaration was a dependent local extern | ||||||
10172 | // declaration, we don't really know its type yet. | ||||||
10173 | if (OldT->isDependentType() && OldD->isLocalExternDecl()) | ||||||
10174 | return false; | ||||||
10175 | |||||||
10176 | return true; | ||||||
10177 | } | ||||||
10178 | |||||||
10179 | /// Checks if the new declaration declared in dependent context must be | ||||||
10180 | /// put in the same redeclaration chain as the specified declaration. | ||||||
10181 | /// | ||||||
10182 | /// \param D Declaration that is checked. | ||||||
10183 | /// \param PrevDecl Previous declaration found with proper lookup method for the | ||||||
10184 | /// same declaration name. | ||||||
10185 | /// \returns True if D must be added to the redeclaration chain which PrevDecl | ||||||
10186 | /// belongs to. | ||||||
10187 | /// | ||||||
10188 | bool Sema::shouldLinkDependentDeclWithPrevious(Decl *D, Decl *PrevDecl) { | ||||||
10189 | if (!D->getLexicalDeclContext()->isDependentContext()) | ||||||
10190 | return true; | ||||||
10191 | |||||||
10192 | // Don't chain dependent friend function definitions until instantiation, to | ||||||
10193 | // permit cases like | ||||||
10194 | // | ||||||
10195 | // void func(); | ||||||
10196 | // template<typename T> class C1 { friend void func() {} }; | ||||||
10197 | // template<typename T> class C2 { friend void func() {} }; | ||||||
10198 | // | ||||||
10199 | // ... which is valid if only one of C1 and C2 is ever instantiated. | ||||||
10200 | // | ||||||
10201 | // FIXME: This need only apply to function definitions. For now, we proxy | ||||||
10202 | // this by checking for a file-scope function. We do not want this to apply | ||||||
10203 | // to friend declarations nominating member functions, because that gets in | ||||||
10204 | // the way of access checks. | ||||||
10205 | if (D->getFriendObjectKind() && D->getDeclContext()->isFileContext()) | ||||||
10206 | return false; | ||||||
10207 | |||||||
10208 | auto *VD = dyn_cast<ValueDecl>(D); | ||||||
10209 | auto *PrevVD = dyn_cast<ValueDecl>(PrevDecl); | ||||||
10210 | return !VD || !PrevVD || | ||||||
10211 | canFullyTypeCheckRedeclaration(VD, PrevVD, VD->getType(), | ||||||
10212 | PrevVD->getType()); | ||||||
10213 | } | ||||||
10214 | |||||||
10215 | /// Check the target attribute of the function for MultiVersion | ||||||
10216 | /// validity. | ||||||
10217 | /// | ||||||
10218 | /// Returns true if there was an error, false otherwise. | ||||||
10219 | static bool CheckMultiVersionValue(Sema &S, const FunctionDecl *FD) { | ||||||
10220 | const auto *TA = FD->getAttr<TargetAttr>(); | ||||||
10221 | assert(TA && "MultiVersion Candidate requires a target attribute")(static_cast <bool> (TA && "MultiVersion Candidate requires a target attribute" ) ? void (0) : __assert_fail ("TA && \"MultiVersion Candidate requires a target attribute\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10221, __extension__ __PRETTY_FUNCTION__)); | ||||||
10222 | ParsedTargetAttr ParseInfo = TA->parse(); | ||||||
10223 | const TargetInfo &TargetInfo = S.Context.getTargetInfo(); | ||||||
10224 | enum ErrType { Feature = 0, Architecture = 1 }; | ||||||
10225 | |||||||
10226 | if (!ParseInfo.Architecture.empty() && | ||||||
10227 | !TargetInfo.validateCpuIs(ParseInfo.Architecture)) { | ||||||
10228 | S.Diag(FD->getLocation(), diag::err_bad_multiversion_option) | ||||||
10229 | << Architecture << ParseInfo.Architecture; | ||||||
10230 | return true; | ||||||
10231 | } | ||||||
10232 | |||||||
10233 | for (const auto &Feat : ParseInfo.Features) { | ||||||
10234 | auto BareFeat = StringRef{Feat}.substr(1); | ||||||
10235 | if (Feat[0] == '-') { | ||||||
10236 | S.Diag(FD->getLocation(), diag::err_bad_multiversion_option) | ||||||
10237 | << Feature << ("no-" + BareFeat).str(); | ||||||
10238 | return true; | ||||||
10239 | } | ||||||
10240 | |||||||
10241 | if (!TargetInfo.validateCpuSupports(BareFeat) || | ||||||
10242 | !TargetInfo.isValidFeatureName(BareFeat)) { | ||||||
10243 | S.Diag(FD->getLocation(), diag::err_bad_multiversion_option) | ||||||
10244 | << Feature << BareFeat; | ||||||
10245 | return true; | ||||||
10246 | } | ||||||
10247 | } | ||||||
10248 | return false; | ||||||
10249 | } | ||||||
10250 | |||||||
10251 | // Provide a white-list of attributes that are allowed to be combined with | ||||||
10252 | // multiversion functions. | ||||||
10253 | static bool AttrCompatibleWithMultiVersion(attr::Kind Kind, | ||||||
10254 | MultiVersionKind MVType) { | ||||||
10255 | // Note: this list/diagnosis must match the list in | ||||||
10256 | // checkMultiversionAttributesAllSame. | ||||||
10257 | switch (Kind) { | ||||||
10258 | default: | ||||||
10259 | return false; | ||||||
10260 | case attr::Used: | ||||||
10261 | return MVType == MultiVersionKind::Target; | ||||||
10262 | case attr::NonNull: | ||||||
10263 | case attr::NoThrow: | ||||||
10264 | return true; | ||||||
10265 | } | ||||||
10266 | } | ||||||
10267 | |||||||
10268 | static bool checkNonMultiVersionCompatAttributes(Sema &S, | ||||||
10269 | const FunctionDecl *FD, | ||||||
10270 | const FunctionDecl *CausedFD, | ||||||
10271 | MultiVersionKind MVType) { | ||||||
10272 | bool IsCPUSpecificCPUDispatchMVType = | ||||||
10273 | MVType == MultiVersionKind::CPUDispatch || | ||||||
10274 | MVType == MultiVersionKind::CPUSpecific; | ||||||
10275 | const auto Diagnose = [FD, CausedFD, IsCPUSpecificCPUDispatchMVType]( | ||||||
10276 | Sema &S, const Attr *A) { | ||||||
10277 | S.Diag(FD->getLocation(), diag::err_multiversion_disallowed_other_attr) | ||||||
10278 | << IsCPUSpecificCPUDispatchMVType << A; | ||||||
10279 | if (CausedFD) | ||||||
10280 | S.Diag(CausedFD->getLocation(), diag::note_multiversioning_caused_here); | ||||||
10281 | return true; | ||||||
10282 | }; | ||||||
10283 | |||||||
10284 | for (const Attr *A : FD->attrs()) { | ||||||
10285 | switch (A->getKind()) { | ||||||
10286 | case attr::CPUDispatch: | ||||||
10287 | case attr::CPUSpecific: | ||||||
10288 | if (MVType != MultiVersionKind::CPUDispatch && | ||||||
10289 | MVType != MultiVersionKind::CPUSpecific) | ||||||
10290 | return Diagnose(S, A); | ||||||
10291 | break; | ||||||
10292 | case attr::Target: | ||||||
10293 | if (MVType != MultiVersionKind::Target) | ||||||
10294 | return Diagnose(S, A); | ||||||
10295 | break; | ||||||
10296 | default: | ||||||
10297 | if (!AttrCompatibleWithMultiVersion(A->getKind(), MVType)) | ||||||
10298 | return Diagnose(S, A); | ||||||
10299 | break; | ||||||
10300 | } | ||||||
10301 | } | ||||||
10302 | return false; | ||||||
10303 | } | ||||||
10304 | |||||||
10305 | bool Sema::areMultiversionVariantFunctionsCompatible( | ||||||
10306 | const FunctionDecl *OldFD, const FunctionDecl *NewFD, | ||||||
10307 | const PartialDiagnostic &NoProtoDiagID, | ||||||
10308 | const PartialDiagnosticAt &NoteCausedDiagIDAt, | ||||||
10309 | const PartialDiagnosticAt &NoSupportDiagIDAt, | ||||||
10310 | const PartialDiagnosticAt &DiffDiagIDAt, bool TemplatesSupported, | ||||||
10311 | bool ConstexprSupported, bool CLinkageMayDiffer) { | ||||||
10312 | enum DoesntSupport { | ||||||
10313 | FuncTemplates = 0, | ||||||
10314 | VirtFuncs = 1, | ||||||
10315 | DeducedReturn = 2, | ||||||
10316 | Constructors = 3, | ||||||
10317 | Destructors = 4, | ||||||
10318 | DeletedFuncs = 5, | ||||||
10319 | DefaultedFuncs = 6, | ||||||
10320 | ConstexprFuncs = 7, | ||||||
10321 | ConstevalFuncs = 8, | ||||||
10322 | }; | ||||||
10323 | enum Different { | ||||||
10324 | CallingConv = 0, | ||||||
10325 | ReturnType = 1, | ||||||
10326 | ConstexprSpec = 2, | ||||||
10327 | InlineSpec = 3, | ||||||
10328 | Linkage = 4, | ||||||
10329 | LanguageLinkage = 5, | ||||||
10330 | }; | ||||||
10331 | |||||||
10332 | if (NoProtoDiagID.getDiagID() != 0 && OldFD && | ||||||
10333 | !OldFD->getType()->getAs<FunctionProtoType>()) { | ||||||
10334 | Diag(OldFD->getLocation(), NoProtoDiagID); | ||||||
10335 | Diag(NoteCausedDiagIDAt.first, NoteCausedDiagIDAt.second); | ||||||
10336 | return true; | ||||||
10337 | } | ||||||
10338 | |||||||
10339 | if (NoProtoDiagID.getDiagID() != 0 && | ||||||
10340 | !NewFD->getType()->getAs<FunctionProtoType>()) | ||||||
10341 | return Diag(NewFD->getLocation(), NoProtoDiagID); | ||||||
10342 | |||||||
10343 | if (!TemplatesSupported && | ||||||
10344 | NewFD->getTemplatedKind() == FunctionDecl::TK_FunctionTemplate) | ||||||
10345 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10346 | << FuncTemplates; | ||||||
10347 | |||||||
10348 | if (const auto *NewCXXFD = dyn_cast<CXXMethodDecl>(NewFD)) { | ||||||
10349 | if (NewCXXFD->isVirtual()) | ||||||
10350 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10351 | << VirtFuncs; | ||||||
10352 | |||||||
10353 | if (isa<CXXConstructorDecl>(NewCXXFD)) | ||||||
10354 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10355 | << Constructors; | ||||||
10356 | |||||||
10357 | if (isa<CXXDestructorDecl>(NewCXXFD)) | ||||||
10358 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10359 | << Destructors; | ||||||
10360 | } | ||||||
10361 | |||||||
10362 | if (NewFD->isDeleted()) | ||||||
10363 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10364 | << DeletedFuncs; | ||||||
10365 | |||||||
10366 | if (NewFD->isDefaulted()) | ||||||
10367 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10368 | << DefaultedFuncs; | ||||||
10369 | |||||||
10370 | if (!ConstexprSupported && NewFD->isConstexpr()) | ||||||
10371 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10372 | << (NewFD->isConsteval() ? ConstevalFuncs : ConstexprFuncs); | ||||||
10373 | |||||||
10374 | QualType NewQType = Context.getCanonicalType(NewFD->getType()); | ||||||
10375 | const auto *NewType = cast<FunctionType>(NewQType); | ||||||
10376 | QualType NewReturnType = NewType->getReturnType(); | ||||||
10377 | |||||||
10378 | if (NewReturnType->isUndeducedType()) | ||||||
10379 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10380 | << DeducedReturn; | ||||||
10381 | |||||||
10382 | // Ensure the return type is identical. | ||||||
10383 | if (OldFD) { | ||||||
10384 | QualType OldQType = Context.getCanonicalType(OldFD->getType()); | ||||||
10385 | const auto *OldType = cast<FunctionType>(OldQType); | ||||||
10386 | FunctionType::ExtInfo OldTypeInfo = OldType->getExtInfo(); | ||||||
10387 | FunctionType::ExtInfo NewTypeInfo = NewType->getExtInfo(); | ||||||
10388 | |||||||
10389 | if (OldTypeInfo.getCC() != NewTypeInfo.getCC()) | ||||||
10390 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << CallingConv; | ||||||
10391 | |||||||
10392 | QualType OldReturnType = OldType->getReturnType(); | ||||||
10393 | |||||||
10394 | if (OldReturnType != NewReturnType) | ||||||
10395 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << ReturnType; | ||||||
10396 | |||||||
10397 | if (OldFD->getConstexprKind() != NewFD->getConstexprKind()) | ||||||
10398 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << ConstexprSpec; | ||||||
10399 | |||||||
10400 | if (OldFD->isInlineSpecified() != NewFD->isInlineSpecified()) | ||||||
10401 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << InlineSpec; | ||||||
10402 | |||||||
10403 | if (OldFD->getFormalLinkage() != NewFD->getFormalLinkage()) | ||||||
10404 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << Linkage; | ||||||
10405 | |||||||
10406 | if (!CLinkageMayDiffer && OldFD->isExternC() != NewFD->isExternC()) | ||||||
10407 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << LanguageLinkage; | ||||||
10408 | |||||||
10409 | if (CheckEquivalentExceptionSpec( | ||||||
10410 | OldFD->getType()->getAs<FunctionProtoType>(), OldFD->getLocation(), | ||||||
10411 | NewFD->getType()->getAs<FunctionProtoType>(), NewFD->getLocation())) | ||||||
10412 | return true; | ||||||
10413 | } | ||||||
10414 | return false; | ||||||
10415 | } | ||||||
10416 | |||||||
10417 | static bool CheckMultiVersionAdditionalRules(Sema &S, const FunctionDecl *OldFD, | ||||||
10418 | const FunctionDecl *NewFD, | ||||||
10419 | bool CausesMV, | ||||||
10420 | MultiVersionKind MVType) { | ||||||
10421 | if (!S.getASTContext().getTargetInfo().supportsMultiVersioning()) { | ||||||
10422 | S.Diag(NewFD->getLocation(), diag::err_multiversion_not_supported); | ||||||
10423 | if (OldFD) | ||||||
10424 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10425 | return true; | ||||||
10426 | } | ||||||
10427 | |||||||
10428 | bool IsCPUSpecificCPUDispatchMVType = | ||||||
10429 | MVType == MultiVersionKind::CPUDispatch || | ||||||
10430 | MVType == MultiVersionKind::CPUSpecific; | ||||||
10431 | |||||||
10432 | if (CausesMV && OldFD && | ||||||
10433 | checkNonMultiVersionCompatAttributes(S, OldFD, NewFD, MVType)) | ||||||
10434 | return true; | ||||||
10435 | |||||||
10436 | if (checkNonMultiVersionCompatAttributes(S, NewFD, nullptr, MVType)) | ||||||
10437 | return true; | ||||||
10438 | |||||||
10439 | // Only allow transition to MultiVersion if it hasn't been used. | ||||||
10440 | if (OldFD && CausesMV && OldFD->isUsed(false)) | ||||||
10441 | return S.Diag(NewFD->getLocation(), diag::err_multiversion_after_used); | ||||||
10442 | |||||||
10443 | return S.areMultiversionVariantFunctionsCompatible( | ||||||
10444 | OldFD, NewFD, S.PDiag(diag::err_multiversion_noproto), | ||||||
10445 | PartialDiagnosticAt(NewFD->getLocation(), | ||||||
10446 | S.PDiag(diag::note_multiversioning_caused_here)), | ||||||
10447 | PartialDiagnosticAt(NewFD->getLocation(), | ||||||
10448 | S.PDiag(diag::err_multiversion_doesnt_support) | ||||||
10449 | << IsCPUSpecificCPUDispatchMVType), | ||||||
10450 | PartialDiagnosticAt(NewFD->getLocation(), | ||||||
10451 | S.PDiag(diag::err_multiversion_diff)), | ||||||
10452 | /*TemplatesSupported=*/false, | ||||||
10453 | /*ConstexprSupported=*/!IsCPUSpecificCPUDispatchMVType, | ||||||
10454 | /*CLinkageMayDiffer=*/false); | ||||||
10455 | } | ||||||
10456 | |||||||
10457 | /// Check the validity of a multiversion function declaration that is the | ||||||
10458 | /// first of its kind. Also sets the multiversion'ness' of the function itself. | ||||||
10459 | /// | ||||||
10460 | /// This sets NewFD->isInvalidDecl() to true if there was an error. | ||||||
10461 | /// | ||||||
10462 | /// Returns true if there was an error, false otherwise. | ||||||
10463 | static bool CheckMultiVersionFirstFunction(Sema &S, FunctionDecl *FD, | ||||||
10464 | MultiVersionKind MVType, | ||||||
10465 | const TargetAttr *TA) { | ||||||
10466 | assert(MVType != MultiVersionKind::None &&(static_cast <bool> (MVType != MultiVersionKind::None && "Function lacks multiversion attribute") ? void (0) : __assert_fail ("MVType != MultiVersionKind::None && \"Function lacks multiversion attribute\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10467, __extension__ __PRETTY_FUNCTION__)) | ||||||
10467 | "Function lacks multiversion attribute")(static_cast <bool> (MVType != MultiVersionKind::None && "Function lacks multiversion attribute") ? void (0) : __assert_fail ("MVType != MultiVersionKind::None && \"Function lacks multiversion attribute\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10467, __extension__ __PRETTY_FUNCTION__)); | ||||||
10468 | |||||||
10469 | // Target only causes MV if it is default, otherwise this is a normal | ||||||
10470 | // function. | ||||||
10471 | if (MVType == MultiVersionKind::Target && !TA->isDefaultVersion()) | ||||||
10472 | return false; | ||||||
10473 | |||||||
10474 | if (MVType == MultiVersionKind::Target && CheckMultiVersionValue(S, FD)) { | ||||||
10475 | FD->setInvalidDecl(); | ||||||
10476 | return true; | ||||||
10477 | } | ||||||
10478 | |||||||
10479 | if (CheckMultiVersionAdditionalRules(S, nullptr, FD, true, MVType)) { | ||||||
10480 | FD->setInvalidDecl(); | ||||||
10481 | return true; | ||||||
10482 | } | ||||||
10483 | |||||||
10484 | FD->setIsMultiVersion(); | ||||||
10485 | return false; | ||||||
10486 | } | ||||||
10487 | |||||||
10488 | static bool PreviousDeclsHaveMultiVersionAttribute(const FunctionDecl *FD) { | ||||||
10489 | for (const Decl *D = FD->getPreviousDecl(); D; D = D->getPreviousDecl()) { | ||||||
10490 | if (D->getAsFunction()->getMultiVersionKind() != MultiVersionKind::None) | ||||||
10491 | return true; | ||||||
10492 | } | ||||||
10493 | |||||||
10494 | return false; | ||||||
10495 | } | ||||||
10496 | |||||||
10497 | static bool CheckTargetCausesMultiVersioning( | ||||||
10498 | Sema &S, FunctionDecl *OldFD, FunctionDecl *NewFD, const TargetAttr *NewTA, | ||||||
10499 | bool &Redeclaration, NamedDecl *&OldDecl, bool &MergeTypeWithPrevious, | ||||||
10500 | LookupResult &Previous) { | ||||||
10501 | const auto *OldTA = OldFD->getAttr<TargetAttr>(); | ||||||
10502 | ParsedTargetAttr NewParsed = NewTA->parse(); | ||||||
10503 | // Sort order doesn't matter, it just needs to be consistent. | ||||||
10504 | llvm::sort(NewParsed.Features); | ||||||
10505 | |||||||
10506 | // If the old decl is NOT MultiVersioned yet, and we don't cause that | ||||||
10507 | // to change, this is a simple redeclaration. | ||||||
10508 | if (!NewTA->isDefaultVersion() && | ||||||
10509 | (!OldTA || OldTA->getFeaturesStr() == NewTA->getFeaturesStr())) | ||||||
10510 | return false; | ||||||
10511 | |||||||
10512 | // Otherwise, this decl causes MultiVersioning. | ||||||
10513 | if (!S.getASTContext().getTargetInfo().supportsMultiVersioning()) { | ||||||
10514 | S.Diag(NewFD->getLocation(), diag::err_multiversion_not_supported); | ||||||
10515 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10516 | NewFD->setInvalidDecl(); | ||||||
10517 | return true; | ||||||
10518 | } | ||||||
10519 | |||||||
10520 | if (CheckMultiVersionAdditionalRules(S, OldFD, NewFD, true, | ||||||
10521 | MultiVersionKind::Target)) { | ||||||
10522 | NewFD->setInvalidDecl(); | ||||||
10523 | return true; | ||||||
10524 | } | ||||||
10525 | |||||||
10526 | if (CheckMultiVersionValue(S, NewFD)) { | ||||||
10527 | NewFD->setInvalidDecl(); | ||||||
10528 | return true; | ||||||
10529 | } | ||||||
10530 | |||||||
10531 | // If this is 'default', permit the forward declaration. | ||||||
10532 | if (!OldFD->isMultiVersion() && !OldTA && NewTA->isDefaultVersion()) { | ||||||
10533 | Redeclaration = true; | ||||||
10534 | OldDecl = OldFD; | ||||||
10535 | OldFD->setIsMultiVersion(); | ||||||
10536 | NewFD->setIsMultiVersion(); | ||||||
10537 | return false; | ||||||
10538 | } | ||||||
10539 | |||||||
10540 | if (CheckMultiVersionValue(S, OldFD)) { | ||||||
10541 | S.Diag(NewFD->getLocation(), diag::note_multiversioning_caused_here); | ||||||
10542 | NewFD->setInvalidDecl(); | ||||||
10543 | return true; | ||||||
10544 | } | ||||||
10545 | |||||||
10546 | ParsedTargetAttr OldParsed = OldTA->parse(std::less<std::string>()); | ||||||
10547 | |||||||
10548 | if (OldParsed == NewParsed) { | ||||||
10549 | S.Diag(NewFD->getLocation(), diag::err_multiversion_duplicate); | ||||||
10550 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10551 | NewFD->setInvalidDecl(); | ||||||
10552 | return true; | ||||||
10553 | } | ||||||
10554 | |||||||
10555 | for (const auto *FD : OldFD->redecls()) { | ||||||
10556 | const auto *CurTA = FD->getAttr<TargetAttr>(); | ||||||
10557 | // We allow forward declarations before ANY multiversioning attributes, but | ||||||
10558 | // nothing after the fact. | ||||||
10559 | if (PreviousDeclsHaveMultiVersionAttribute(FD) && | ||||||
10560 | (!CurTA || CurTA->isInherited())) { | ||||||
10561 | S.Diag(FD->getLocation(), diag::err_multiversion_required_in_redecl) | ||||||
10562 | << 0; | ||||||
10563 | S.Diag(NewFD->getLocation(), diag::note_multiversioning_caused_here); | ||||||
10564 | NewFD->setInvalidDecl(); | ||||||
10565 | return true; | ||||||
10566 | } | ||||||
10567 | } | ||||||
10568 | |||||||
10569 | OldFD->setIsMultiVersion(); | ||||||
10570 | NewFD->setIsMultiVersion(); | ||||||
10571 | Redeclaration = false; | ||||||
10572 | MergeTypeWithPrevious = false; | ||||||
10573 | OldDecl = nullptr; | ||||||
10574 | Previous.clear(); | ||||||
10575 | return false; | ||||||
10576 | } | ||||||
10577 | |||||||
10578 | /// Check the validity of a new function declaration being added to an existing | ||||||
10579 | /// multiversioned declaration collection. | ||||||
10580 | static bool CheckMultiVersionAdditionalDecl( | ||||||
10581 | Sema &S, FunctionDecl *OldFD, FunctionDecl *NewFD, | ||||||
10582 | MultiVersionKind NewMVType, const TargetAttr *NewTA, | ||||||
10583 | const CPUDispatchAttr *NewCPUDisp, const CPUSpecificAttr *NewCPUSpec, | ||||||
10584 | bool &Redeclaration, NamedDecl *&OldDecl, bool &MergeTypeWithPrevious, | ||||||
10585 | LookupResult &Previous) { | ||||||
10586 | |||||||
10587 | MultiVersionKind OldMVType = OldFD->getMultiVersionKind(); | ||||||
10588 | // Disallow mixing of multiversioning types. | ||||||
10589 | if ((OldMVType == MultiVersionKind::Target && | ||||||
10590 | NewMVType != MultiVersionKind::Target) || | ||||||
10591 | (NewMVType == MultiVersionKind::Target && | ||||||
10592 | OldMVType != MultiVersionKind::Target)) { | ||||||
10593 | S.Diag(NewFD->getLocation(), diag::err_multiversion_types_mixed); | ||||||
10594 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10595 | NewFD->setInvalidDecl(); | ||||||
10596 | return true; | ||||||
10597 | } | ||||||
10598 | |||||||
10599 | ParsedTargetAttr NewParsed; | ||||||
10600 | if (NewTA) { | ||||||
10601 | NewParsed = NewTA->parse(); | ||||||
10602 | llvm::sort(NewParsed.Features); | ||||||
10603 | } | ||||||
10604 | |||||||
10605 | bool UseMemberUsingDeclRules = | ||||||
10606 | S.CurContext->isRecord() && !NewFD->getFriendObjectKind(); | ||||||
10607 | |||||||
10608 | // Next, check ALL non-overloads to see if this is a redeclaration of a | ||||||
10609 | // previous member of the MultiVersion set. | ||||||
10610 | for (NamedDecl *ND : Previous) { | ||||||
10611 | FunctionDecl *CurFD = ND->getAsFunction(); | ||||||
10612 | if (!CurFD) | ||||||
10613 | continue; | ||||||
10614 | if (S.IsOverload(NewFD, CurFD, UseMemberUsingDeclRules)) | ||||||
10615 | continue; | ||||||
10616 | |||||||
10617 | if (NewMVType == MultiVersionKind::Target) { | ||||||
10618 | const auto *CurTA = CurFD->getAttr<TargetAttr>(); | ||||||
10619 | if (CurTA->getFeaturesStr() == NewTA->getFeaturesStr()) { | ||||||
10620 | NewFD->setIsMultiVersion(); | ||||||
10621 | Redeclaration = true; | ||||||
10622 | OldDecl = ND; | ||||||
10623 | return false; | ||||||
10624 | } | ||||||
10625 | |||||||
10626 | ParsedTargetAttr CurParsed = CurTA->parse(std::less<std::string>()); | ||||||
10627 | if (CurParsed == NewParsed) { | ||||||
10628 | S.Diag(NewFD->getLocation(), diag::err_multiversion_duplicate); | ||||||
10629 | S.Diag(CurFD->getLocation(), diag::note_previous_declaration); | ||||||
10630 | NewFD->setInvalidDecl(); | ||||||
10631 | return true; | ||||||
10632 | } | ||||||
10633 | } else { | ||||||
10634 | const auto *CurCPUSpec = CurFD->getAttr<CPUSpecificAttr>(); | ||||||
10635 | const auto *CurCPUDisp = CurFD->getAttr<CPUDispatchAttr>(); | ||||||
10636 | // Handle CPUDispatch/CPUSpecific versions. | ||||||
10637 | // Only 1 CPUDispatch function is allowed, this will make it go through | ||||||
10638 | // the redeclaration errors. | ||||||
10639 | if (NewMVType == MultiVersionKind::CPUDispatch && | ||||||
10640 | CurFD->hasAttr<CPUDispatchAttr>()) { | ||||||
10641 | if (CurCPUDisp->cpus_size() == NewCPUDisp->cpus_size() && | ||||||
10642 | std::equal( | ||||||
10643 | CurCPUDisp->cpus_begin(), CurCPUDisp->cpus_end(), | ||||||
10644 | NewCPUDisp->cpus_begin(), | ||||||
10645 | [](const IdentifierInfo *Cur, const IdentifierInfo *New) { | ||||||
10646 | return Cur->getName() == New->getName(); | ||||||
10647 | })) { | ||||||
10648 | NewFD->setIsMultiVersion(); | ||||||
10649 | Redeclaration = true; | ||||||
10650 | OldDecl = ND; | ||||||
10651 | return false; | ||||||
10652 | } | ||||||
10653 | |||||||
10654 | // If the declarations don't match, this is an error condition. | ||||||
10655 | S.Diag(NewFD->getLocation(), diag::err_cpu_dispatch_mismatch); | ||||||
10656 | S.Diag(CurFD->getLocation(), diag::note_previous_declaration); | ||||||
10657 | NewFD->setInvalidDecl(); | ||||||
10658 | return true; | ||||||
10659 | } | ||||||
10660 | if (NewMVType == MultiVersionKind::CPUSpecific && CurCPUSpec) { | ||||||
10661 | |||||||
10662 | if (CurCPUSpec->cpus_size() == NewCPUSpec->cpus_size() && | ||||||
10663 | std::equal( | ||||||
10664 | CurCPUSpec->cpus_begin(), CurCPUSpec->cpus_end(), | ||||||
10665 | NewCPUSpec->cpus_begin(), | ||||||
10666 | [](const IdentifierInfo *Cur, const IdentifierInfo *New) { | ||||||
10667 | return Cur->getName() == New->getName(); | ||||||
10668 | })) { | ||||||
10669 | NewFD->setIsMultiVersion(); | ||||||
10670 | Redeclaration = true; | ||||||
10671 | OldDecl = ND; | ||||||
10672 | return false; | ||||||
10673 | } | ||||||
10674 | |||||||
10675 | // Only 1 version of CPUSpecific is allowed for each CPU. | ||||||
10676 | for (const IdentifierInfo *CurII : CurCPUSpec->cpus()) { | ||||||
10677 | for (const IdentifierInfo *NewII : NewCPUSpec->cpus()) { | ||||||
10678 | if (CurII == NewII) { | ||||||
10679 | S.Diag(NewFD->getLocation(), diag::err_cpu_specific_multiple_defs) | ||||||
10680 | << NewII; | ||||||
10681 | S.Diag(CurFD->getLocation(), diag::note_previous_declaration); | ||||||
10682 | NewFD->setInvalidDecl(); | ||||||
10683 | return true; | ||||||
10684 | } | ||||||
10685 | } | ||||||
10686 | } | ||||||
10687 | } | ||||||
10688 | // If the two decls aren't the same MVType, there is no possible error | ||||||
10689 | // condition. | ||||||
10690 | } | ||||||
10691 | } | ||||||
10692 | |||||||
10693 | // Else, this is simply a non-redecl case. Checking the 'value' is only | ||||||
10694 | // necessary in the Target case, since The CPUSpecific/Dispatch cases are | ||||||
10695 | // handled in the attribute adding step. | ||||||
10696 | if (NewMVType == MultiVersionKind::Target && | ||||||
10697 | CheckMultiVersionValue(S, NewFD)) { | ||||||
10698 | NewFD->setInvalidDecl(); | ||||||
10699 | return true; | ||||||
10700 | } | ||||||
10701 | |||||||
10702 | if (CheckMultiVersionAdditionalRules(S, OldFD, NewFD, | ||||||
10703 | !OldFD->isMultiVersion(), NewMVType)) { | ||||||
10704 | NewFD->setInvalidDecl(); | ||||||
10705 | return true; | ||||||
10706 | } | ||||||
10707 | |||||||
10708 | // Permit forward declarations in the case where these two are compatible. | ||||||
10709 | if (!OldFD->isMultiVersion()) { | ||||||
10710 | OldFD->setIsMultiVersion(); | ||||||
10711 | NewFD->setIsMultiVersion(); | ||||||
10712 | Redeclaration = true; | ||||||
10713 | OldDecl = OldFD; | ||||||
10714 | return false; | ||||||
10715 | } | ||||||
10716 | |||||||
10717 | NewFD->setIsMultiVersion(); | ||||||
10718 | Redeclaration = false; | ||||||
10719 | MergeTypeWithPrevious = false; | ||||||
10720 | OldDecl = nullptr; | ||||||
10721 | Previous.clear(); | ||||||
10722 | return false; | ||||||
10723 | } | ||||||
10724 | |||||||
10725 | |||||||
10726 | /// Check the validity of a mulitversion function declaration. | ||||||
10727 | /// Also sets the multiversion'ness' of the function itself. | ||||||
10728 | /// | ||||||
10729 | /// This sets NewFD->isInvalidDecl() to true if there was an error. | ||||||
10730 | /// | ||||||
10731 | /// Returns true if there was an error, false otherwise. | ||||||
10732 | static bool CheckMultiVersionFunction(Sema &S, FunctionDecl *NewFD, | ||||||
10733 | bool &Redeclaration, NamedDecl *&OldDecl, | ||||||
10734 | bool &MergeTypeWithPrevious, | ||||||
10735 | LookupResult &Previous) { | ||||||
10736 | const auto *NewTA = NewFD->getAttr<TargetAttr>(); | ||||||
10737 | const auto *NewCPUDisp = NewFD->getAttr<CPUDispatchAttr>(); | ||||||
10738 | const auto *NewCPUSpec = NewFD->getAttr<CPUSpecificAttr>(); | ||||||
10739 | |||||||
10740 | // Mixing Multiversioning types is prohibited. | ||||||
10741 | if ((NewTA && NewCPUDisp) || (NewTA
| ||||||
10742 | (NewCPUDisp && NewCPUSpec)) { | ||||||
10743 | S.Diag(NewFD->getLocation(), diag::err_multiversion_types_mixed); | ||||||
10744 | NewFD->setInvalidDecl(); | ||||||
10745 | return true; | ||||||
10746 | } | ||||||
10747 | |||||||
10748 | MultiVersionKind MVType = NewFD->getMultiVersionKind(); | ||||||
10749 | |||||||
10750 | // Main isn't allowed to become a multiversion function, however it IS | ||||||
10751 | // permitted to have 'main' be marked with the 'target' optimization hint. | ||||||
10752 | if (NewFD->isMain()) { | ||||||
10753 | if ((MVType == MultiVersionKind::Target && NewTA->isDefaultVersion()) || | ||||||
| |||||||
10754 | MVType == MultiVersionKind::CPUDispatch || | ||||||
10755 | MVType == MultiVersionKind::CPUSpecific) { | ||||||
10756 | S.Diag(NewFD->getLocation(), diag::err_multiversion_not_allowed_on_main); | ||||||
10757 | NewFD->setInvalidDecl(); | ||||||
10758 | return true; | ||||||
10759 | } | ||||||
10760 | return false; | ||||||
10761 | } | ||||||
10762 | |||||||
10763 | if (!OldDecl || !OldDecl->getAsFunction() || | ||||||
10764 | OldDecl->getDeclContext()->getRedeclContext() != | ||||||
10765 | NewFD->getDeclContext()->getRedeclContext()) { | ||||||
10766 | // If there's no previous declaration, AND this isn't attempting to cause | ||||||
10767 | // multiversioning, this isn't an error condition. | ||||||
10768 | if (MVType == MultiVersionKind::None) | ||||||
10769 | return false; | ||||||
10770 | return CheckMultiVersionFirstFunction(S, NewFD, MVType, NewTA); | ||||||
10771 | } | ||||||
10772 | |||||||
10773 | FunctionDecl *OldFD = OldDecl->getAsFunction(); | ||||||
10774 | |||||||
10775 | if (!OldFD->isMultiVersion() && MVType == MultiVersionKind::None) | ||||||
10776 | return false; | ||||||
10777 | |||||||
10778 | if (OldFD->isMultiVersion() && MVType == MultiVersionKind::None) { | ||||||
10779 | S.Diag(NewFD->getLocation(), diag::err_multiversion_required_in_redecl) | ||||||
10780 | << (OldFD->getMultiVersionKind() != MultiVersionKind::Target); | ||||||
10781 | NewFD->setInvalidDecl(); | ||||||
10782 | return true; | ||||||
10783 | } | ||||||
10784 | |||||||
10785 | // Handle the target potentially causes multiversioning case. | ||||||
10786 | if (!OldFD->isMultiVersion() && MVType == MultiVersionKind::Target) | ||||||
10787 | return CheckTargetCausesMultiVersioning(S, OldFD, NewFD, NewTA, | ||||||
10788 | Redeclaration, OldDecl, | ||||||
10789 | MergeTypeWithPrevious, Previous); | ||||||
10790 | |||||||
10791 | // At this point, we have a multiversion function decl (in OldFD) AND an | ||||||
10792 | // appropriate attribute in the current function decl. Resolve that these are | ||||||
10793 | // still compatible with previous declarations. | ||||||
10794 | return CheckMultiVersionAdditionalDecl( | ||||||
10795 | S, OldFD, NewFD, MVType, NewTA, NewCPUDisp, NewCPUSpec, Redeclaration, | ||||||
10796 | OldDecl, MergeTypeWithPrevious, Previous); | ||||||
10797 | } | ||||||
10798 | |||||||
10799 | /// Perform semantic checking of a new function declaration. | ||||||
10800 | /// | ||||||
10801 | /// Performs semantic analysis of the new function declaration | ||||||
10802 | /// NewFD. This routine performs all semantic checking that does not | ||||||
10803 | /// require the actual declarator involved in the declaration, and is | ||||||
10804 | /// used both for the declaration of functions as they are parsed | ||||||
10805 | /// (called via ActOnDeclarator) and for the declaration of functions | ||||||
10806 | /// that have been instantiated via C++ template instantiation (called | ||||||
10807 | /// via InstantiateDecl). | ||||||
10808 | /// | ||||||
10809 | /// \param IsMemberSpecialization whether this new function declaration is | ||||||
10810 | /// a member specialization (that replaces any definition provided by the | ||||||
10811 | /// previous declaration). | ||||||
10812 | /// | ||||||
10813 | /// This sets NewFD->isInvalidDecl() to true if there was an error. | ||||||
10814 | /// | ||||||
10815 | /// \returns true if the function declaration is a redeclaration. | ||||||
10816 | bool Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD, | ||||||
10817 | LookupResult &Previous, | ||||||
10818 | bool IsMemberSpecialization) { | ||||||
10819 | assert(!NewFD->getReturnType()->isVariablyModifiedType() &&(static_cast <bool> (!NewFD->getReturnType()->isVariablyModifiedType () && "Variably modified return types are not handled here" ) ? void (0) : __assert_fail ("!NewFD->getReturnType()->isVariablyModifiedType() && \"Variably modified return types are not handled here\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10820, __extension__ __PRETTY_FUNCTION__)) | ||||||
| |||||||
10820 | "Variably modified return types are not handled here")(static_cast <bool> (!NewFD->getReturnType()->isVariablyModifiedType () && "Variably modified return types are not handled here" ) ? void (0) : __assert_fail ("!NewFD->getReturnType()->isVariablyModifiedType() && \"Variably modified return types are not handled here\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10820, __extension__ __PRETTY_FUNCTION__)); | ||||||
10821 | |||||||
10822 | // Determine whether the type of this function should be merged with | ||||||
10823 | // a previous visible declaration. This never happens for functions in C++, | ||||||
10824 | // and always happens in C if the previous declaration was visible. | ||||||
10825 | bool MergeTypeWithPrevious = !getLangOpts().CPlusPlus && | ||||||
10826 | !Previous.isShadowed(); | ||||||
10827 | |||||||
10828 | bool Redeclaration = false; | ||||||
10829 | NamedDecl *OldDecl = nullptr; | ||||||
10830 | bool MayNeedOverloadableChecks = false; | ||||||
10831 | |||||||
10832 | // Merge or overload the declaration with an existing declaration of | ||||||
10833 | // the same name, if appropriate. | ||||||
10834 | if (!Previous.empty()) { | ||||||
10835 | // Determine whether NewFD is an overload of PrevDecl or | ||||||
10836 | // a declaration that requires merging. If it's an overload, | ||||||
10837 | // there's no more work to do here; we'll just add the new | ||||||
10838 | // function to the scope. | ||||||
10839 | if (!AllowOverloadingOfFunction(Previous, Context, NewFD)) { | ||||||
10840 | NamedDecl *Candidate = Previous.getRepresentativeDecl(); | ||||||
10841 | if (shouldLinkPossiblyHiddenDecl(Candidate, NewFD)) { | ||||||
10842 | Redeclaration = true; | ||||||
10843 | OldDecl = Candidate; | ||||||
10844 | } | ||||||
10845 | } else { | ||||||
10846 | MayNeedOverloadableChecks = true; | ||||||
10847 | switch (CheckOverload(S, NewFD, Previous, OldDecl, | ||||||
10848 | /*NewIsUsingDecl*/ false)) { | ||||||
10849 | case Ovl_Match: | ||||||
10850 | Redeclaration = true; | ||||||
10851 | break; | ||||||
10852 | |||||||
10853 | case Ovl_NonFunction: | ||||||
10854 | Redeclaration = true; | ||||||
10855 | break; | ||||||
10856 | |||||||
10857 | case Ovl_Overload: | ||||||
10858 | Redeclaration = false; | ||||||
10859 | break; | ||||||
10860 | } | ||||||
10861 | } | ||||||
10862 | } | ||||||
10863 | |||||||
10864 | // Check for a previous extern "C" declaration with this name. | ||||||
10865 | if (!Redeclaration
| ||||||
10866 | checkForConflictWithNonVisibleExternC(*this, NewFD, Previous)) { | ||||||
10867 | if (!Previous.empty()) { | ||||||
10868 | // This is an extern "C" declaration with the same name as a previous | ||||||
10869 | // declaration, and thus redeclares that entity... | ||||||
10870 | Redeclaration = true; | ||||||
10871 | OldDecl = Previous.getFoundDecl(); | ||||||
10872 | MergeTypeWithPrevious = false; | ||||||
10873 | |||||||
10874 | // ... except in the presence of __attribute__((overloadable)). | ||||||
10875 | if (OldDecl->hasAttr<OverloadableAttr>() || | ||||||
10876 | NewFD->hasAttr<OverloadableAttr>()) { | ||||||
10877 | if (IsOverload(NewFD, cast<FunctionDecl>(OldDecl), false)) { | ||||||
10878 | MayNeedOverloadableChecks = true; | ||||||
10879 | Redeclaration = false; | ||||||
10880 | OldDecl = nullptr; | ||||||
10881 | } | ||||||
10882 | } | ||||||
10883 | } | ||||||
10884 | } | ||||||
10885 | |||||||
10886 | if (CheckMultiVersionFunction(*this, NewFD, Redeclaration, OldDecl, | ||||||
10887 | MergeTypeWithPrevious, Previous)) | ||||||
10888 | return Redeclaration; | ||||||
10889 | |||||||
10890 | // PPC MMA non-pointer types are not allowed as function return types. | ||||||
10891 | if (Context.getTargetInfo().getTriple().isPPC64() && | ||||||
10892 | CheckPPCMMAType(NewFD->getReturnType(), NewFD->getLocation())) { | ||||||
10893 | NewFD->setInvalidDecl(); | ||||||
10894 | } | ||||||
10895 | |||||||
10896 | // C++11 [dcl.constexpr]p8: | ||||||
10897 | // A constexpr specifier for a non-static member function that is not | ||||||
10898 | // a constructor declares that member function to be const. | ||||||
10899 | // | ||||||
10900 | // This needs to be delayed until we know whether this is an out-of-line | ||||||
10901 | // definition of a static member function. | ||||||
10902 | // | ||||||
10903 | // This rule is not present in C++1y, so we produce a backwards | ||||||
10904 | // compatibility warning whenever it happens in C++11. | ||||||
10905 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD); | ||||||
10906 | if (!getLangOpts().CPlusPlus14 && MD && MD->isConstexpr() && | ||||||
10907 | !MD->isStatic() && !isa<CXXConstructorDecl>(MD) && | ||||||
10908 | !isa<CXXDestructorDecl>(MD) && !MD->getMethodQualifiers().hasConst()) { | ||||||
10909 | CXXMethodDecl *OldMD = nullptr; | ||||||
10910 | if (OldDecl) | ||||||
10911 | OldMD = dyn_cast_or_null<CXXMethodDecl>(OldDecl->getAsFunction()); | ||||||
10912 | if (!OldMD || !OldMD->isStatic()) { | ||||||
10913 | const FunctionProtoType *FPT = | ||||||
10914 | MD->getType()->castAs<FunctionProtoType>(); | ||||||
10915 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||||
10916 | EPI.TypeQuals.addConst(); | ||||||
10917 | MD->setType(Context.getFunctionType(FPT->getReturnType(), | ||||||
10918 | FPT->getParamTypes(), EPI)); | ||||||
10919 | |||||||
10920 | // Warn that we did this, if we're not performing template instantiation. | ||||||
10921 | // In that case, we'll have warned already when the template was defined. | ||||||
10922 | if (!inTemplateInstantiation()) { | ||||||
10923 | SourceLocation AddConstLoc; | ||||||
10924 | if (FunctionTypeLoc FTL = MD->getTypeSourceInfo()->getTypeLoc() | ||||||
10925 | .IgnoreParens().getAs<FunctionTypeLoc>()) | ||||||
10926 | AddConstLoc = getLocForEndOfToken(FTL.getRParenLoc()); | ||||||
10927 | |||||||
10928 | Diag(MD->getLocation(), diag::warn_cxx14_compat_constexpr_not_const) | ||||||
10929 | << FixItHint::CreateInsertion(AddConstLoc, " const"); | ||||||
10930 | } | ||||||
10931 | } | ||||||
10932 | } | ||||||
10933 | |||||||
10934 | if (Redeclaration) { | ||||||
10935 | // NewFD and OldDecl represent declarations that need to be | ||||||
10936 | // merged. | ||||||
10937 | if (MergeFunctionDecl(NewFD, OldDecl, S, MergeTypeWithPrevious)) { | ||||||
10938 | NewFD->setInvalidDecl(); | ||||||
10939 | return Redeclaration; | ||||||
10940 | } | ||||||
10941 | |||||||
10942 | Previous.clear(); | ||||||
10943 | Previous.addDecl(OldDecl); | ||||||
10944 | |||||||
10945 | if (FunctionTemplateDecl *OldTemplateDecl = | ||||||
10946 | dyn_cast<FunctionTemplateDecl>(OldDecl)) { | ||||||
10947 | auto *OldFD = OldTemplateDecl->getTemplatedDecl(); | ||||||
10948 | FunctionTemplateDecl *NewTemplateDecl | ||||||
10949 | = NewFD->getDescribedFunctionTemplate(); | ||||||
10950 | assert(NewTemplateDecl && "Template/non-template mismatch")(static_cast <bool> (NewTemplateDecl && "Template/non-template mismatch" ) ? void (0) : __assert_fail ("NewTemplateDecl && \"Template/non-template mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10950, __extension__ __PRETTY_FUNCTION__)); | ||||||
10951 | |||||||
10952 | // The call to MergeFunctionDecl above may have created some state in | ||||||
10953 | // NewTemplateDecl that needs to be merged with OldTemplateDecl before we | ||||||
10954 | // can add it as a redeclaration. | ||||||
10955 | NewTemplateDecl->mergePrevDecl(OldTemplateDecl); | ||||||
10956 | |||||||
10957 | NewFD->setPreviousDeclaration(OldFD); | ||||||
10958 | if (NewFD->isCXXClassMember()) { | ||||||
10959 | NewFD->setAccess(OldTemplateDecl->getAccess()); | ||||||
10960 | NewTemplateDecl->setAccess(OldTemplateDecl->getAccess()); | ||||||
10961 | } | ||||||
10962 | |||||||
10963 | // If this is an explicit specialization of a member that is a function | ||||||
10964 | // template, mark it as a member specialization. | ||||||
10965 | if (IsMemberSpecialization && | ||||||
10966 | NewTemplateDecl->getInstantiatedFromMemberTemplate()) { | ||||||
10967 | NewTemplateDecl->setMemberSpecialization(); | ||||||
10968 | assert(OldTemplateDecl->isMemberSpecialization())(static_cast <bool> (OldTemplateDecl->isMemberSpecialization ()) ? void (0) : __assert_fail ("OldTemplateDecl->isMemberSpecialization()" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10968, __extension__ __PRETTY_FUNCTION__)); | ||||||
10969 | // Explicit specializations of a member template do not inherit deleted | ||||||
10970 | // status from the parent member template that they are specializing. | ||||||
10971 | if (OldFD->isDeleted()) { | ||||||
10972 | // FIXME: This assert will not hold in the presence of modules. | ||||||
10973 | assert(OldFD->getCanonicalDecl() == OldFD)(static_cast <bool> (OldFD->getCanonicalDecl() == OldFD ) ? void (0) : __assert_fail ("OldFD->getCanonicalDecl() == OldFD" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10973, __extension__ __PRETTY_FUNCTION__)); | ||||||
10974 | // FIXME: We need an update record for this AST mutation. | ||||||
10975 | OldFD->setDeletedAsWritten(false); | ||||||
10976 | } | ||||||
10977 | } | ||||||
10978 | |||||||
10979 | } else { | ||||||
10980 | if (shouldLinkDependentDeclWithPrevious(NewFD, OldDecl)) { | ||||||
10981 | auto *OldFD = cast<FunctionDecl>(OldDecl); | ||||||
10982 | // This needs to happen first so that 'inline' propagates. | ||||||
10983 | NewFD->setPreviousDeclaration(OldFD); | ||||||
10984 | if (NewFD->isCXXClassMember()) | ||||||
10985 | NewFD->setAccess(OldFD->getAccess()); | ||||||
10986 | } | ||||||
10987 | } | ||||||
10988 | } else if (!getLangOpts().CPlusPlus && MayNeedOverloadableChecks && | ||||||
10989 | !NewFD->getAttr<OverloadableAttr>()) { | ||||||
10990 | assert((Previous.empty() ||(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10995, __extension__ __PRETTY_FUNCTION__)) | ||||||
10991 | llvm::any_of(Previous,(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10995, __extension__ __PRETTY_FUNCTION__)) | ||||||
10992 | [](const NamedDecl *ND) {(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10995, __extension__ __PRETTY_FUNCTION__)) | ||||||
10993 | return ND->hasAttr<OverloadableAttr>();(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10995, __extension__ __PRETTY_FUNCTION__)) | ||||||
10994 | })) &&(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10995, __extension__ __PRETTY_FUNCTION__)) | ||||||
10995 | "Non-redecls shouldn't happen without overloadable present")(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 10995, __extension__ __PRETTY_FUNCTION__)); | ||||||
10996 | |||||||
10997 | auto OtherUnmarkedIter = llvm::find_if(Previous, [](const NamedDecl *ND) { | ||||||
10998 | const auto *FD = dyn_cast<FunctionDecl>(ND); | ||||||
10999 | return FD && !FD->hasAttr<OverloadableAttr>(); | ||||||
11000 | }); | ||||||
11001 | |||||||
11002 | if (OtherUnmarkedIter != Previous.end()) { | ||||||
11003 | Diag(NewFD->getLocation(), | ||||||
11004 | diag::err_attribute_overloadable_multiple_unmarked_overloads); | ||||||
11005 | Diag((*OtherUnmarkedIter)->getLocation(), | ||||||
11006 | diag::note_attribute_overloadable_prev_overload) | ||||||
11007 | << false; | ||||||
11008 | |||||||
11009 | NewFD->addAttr(OverloadableAttr::CreateImplicit(Context)); | ||||||
11010 | } | ||||||
11011 | } | ||||||
11012 | |||||||
11013 | if (LangOpts.OpenMP) | ||||||
11014 | ActOnFinishedFunctionDefinitionInOpenMPAssumeScope(NewFD); | ||||||
11015 | |||||||
11016 | // Semantic checking for this function declaration (in isolation). | ||||||
11017 | |||||||
11018 | if (getLangOpts().CPlusPlus) { | ||||||
11019 | // C++-specific checks. | ||||||
11020 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(NewFD)) { | ||||||
11021 | CheckConstructor(Constructor); | ||||||
11022 | } else if (CXXDestructorDecl *Destructor = | ||||||
11023 | dyn_cast<CXXDestructorDecl>(NewFD)) { | ||||||
11024 | CXXRecordDecl *Record = Destructor->getParent(); | ||||||
11025 | QualType ClassType = Context.getTypeDeclType(Record); | ||||||
11026 | |||||||
11027 | // FIXME: Shouldn't we be able to perform this check even when the class | ||||||
11028 | // type is dependent? Both gcc and edg can handle that. | ||||||
11029 | if (!ClassType->isDependentType()) { | ||||||
11030 | DeclarationName Name | ||||||
11031 | = Context.DeclarationNames.getCXXDestructorName( | ||||||
11032 | Context.getCanonicalType(ClassType)); | ||||||
11033 | if (NewFD->getDeclName() != Name) { | ||||||
11034 | Diag(NewFD->getLocation(), diag::err_destructor_name); | ||||||
11035 | NewFD->setInvalidDecl(); | ||||||
11036 | return Redeclaration; | ||||||
11037 | } | ||||||
11038 | } | ||||||
11039 | } else if (auto *Guide = dyn_cast<CXXDeductionGuideDecl>(NewFD)) { | ||||||
11040 | if (auto *TD = Guide->getDescribedFunctionTemplate()) | ||||||
11041 | CheckDeductionGuideTemplate(TD); | ||||||
11042 | |||||||
11043 | // A deduction guide is not on the list of entities that can be | ||||||
11044 | // explicitly specialized. | ||||||
11045 | if (Guide->getTemplateSpecializationKind() == TSK_ExplicitSpecialization) | ||||||
11046 | Diag(Guide->getBeginLoc(), diag::err_deduction_guide_specialized) | ||||||
11047 | << /*explicit specialization*/ 1; | ||||||
11048 | } | ||||||
11049 | |||||||
11050 | // Find any virtual functions that this function overrides. | ||||||
11051 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD)) { | ||||||
11052 | if (!Method->isFunctionTemplateSpecialization() && | ||||||
11053 | !Method->getDescribedFunctionTemplate() && | ||||||
11054 | Method->isCanonicalDecl()) { | ||||||
11055 | AddOverriddenMethods(Method->getParent(), Method); | ||||||
11056 | } | ||||||
11057 | if (Method->isVirtual() && NewFD->getTrailingRequiresClause()) | ||||||
11058 | // C++2a [class.virtual]p6 | ||||||
11059 | // A virtual method shall not have a requires-clause. | ||||||
11060 | Diag(NewFD->getTrailingRequiresClause()->getBeginLoc(), | ||||||
11061 | diag::err_constrained_virtual_method); | ||||||
11062 | |||||||
11063 | if (Method->isStatic()) | ||||||
11064 | checkThisInStaticMemberFunctionType(Method); | ||||||
11065 | } | ||||||
11066 | |||||||
11067 | if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(NewFD)) | ||||||
11068 | ActOnConversionDeclarator(Conversion); | ||||||
11069 | |||||||
11070 | // Extra checking for C++ overloaded operators (C++ [over.oper]). | ||||||
11071 | if (NewFD->isOverloadedOperator() && | ||||||
11072 | CheckOverloadedOperatorDeclaration(NewFD)) { | ||||||
11073 | NewFD->setInvalidDecl(); | ||||||
11074 | return Redeclaration; | ||||||
11075 | } | ||||||
11076 | |||||||
11077 | // Extra checking for C++0x literal operators (C++0x [over.literal]). | ||||||
11078 | if (NewFD->getLiteralIdentifier() && | ||||||
11079 | CheckLiteralOperatorDeclaration(NewFD)) { | ||||||
11080 | NewFD->setInvalidDecl(); | ||||||
11081 | return Redeclaration; | ||||||
11082 | } | ||||||
11083 | |||||||
11084 | // In C++, check default arguments now that we have merged decls. Unless | ||||||
11085 | // the lexical context is the class, because in this case this is done | ||||||
11086 | // during delayed parsing anyway. | ||||||
11087 | if (!CurContext->isRecord()) | ||||||
11088 | CheckCXXDefaultArguments(NewFD); | ||||||
11089 | |||||||
11090 | // If this function is declared as being extern "C", then check to see if | ||||||
11091 | // the function returns a UDT (class, struct, or union type) that is not C | ||||||
11092 | // compatible, and if it does, warn the user. | ||||||
11093 | // But, issue any diagnostic on the first declaration only. | ||||||
11094 | if (Previous.empty() && NewFD->isExternC()) { | ||||||
11095 | QualType R = NewFD->getReturnType(); | ||||||
11096 | if (R->isIncompleteType() && !R->isVoidType()) | ||||||
11097 | Diag(NewFD->getLocation(), diag::warn_return_value_udt_incomplete) | ||||||
11098 | << NewFD << R; | ||||||
11099 | else if (!R.isPODType(Context) && !R->isVoidType() && | ||||||
11100 | !R->isObjCObjectPointerType()) | ||||||
11101 | Diag(NewFD->getLocation(), diag::warn_return_value_udt) << NewFD << R; | ||||||
11102 | } | ||||||
11103 | |||||||
11104 | // C++1z [dcl.fct]p6: | ||||||
11105 | // [...] whether the function has a non-throwing exception-specification | ||||||
11106 | // [is] part of the function type | ||||||
11107 | // | ||||||
11108 | // This results in an ABI break between C++14 and C++17 for functions whose | ||||||
11109 | // declared type includes an exception-specification in a parameter or | ||||||
11110 | // return type. (Exception specifications on the function itself are OK in | ||||||
11111 | // most cases, and exception specifications are not permitted in most other | ||||||
11112 | // contexts where they could make it into a mangling.) | ||||||
11113 | if (!getLangOpts().CPlusPlus17 && !NewFD->getPrimaryTemplate()) { | ||||||
11114 | auto HasNoexcept = [&](QualType T) -> bool { | ||||||
11115 | // Strip off declarator chunks that could be between us and a function | ||||||
11116 | // type. We don't need to look far, exception specifications are very | ||||||
11117 | // restricted prior to C++17. | ||||||
11118 | if (auto *RT = T->getAs<ReferenceType>()) | ||||||
11119 | T = RT->getPointeeType(); | ||||||
11120 | else if (T->isAnyPointerType()) | ||||||
11121 | T = T->getPointeeType(); | ||||||
11122 | else if (auto *MPT = T->getAs<MemberPointerType>()) | ||||||
11123 | T = MPT->getPointeeType(); | ||||||
11124 | if (auto *FPT = T->getAs<FunctionProtoType>()) | ||||||
11125 | if (FPT->isNothrow()) | ||||||
11126 | return true; | ||||||
11127 | return false; | ||||||
11128 | }; | ||||||
11129 | |||||||
11130 | auto *FPT = NewFD->getType()->castAs<FunctionProtoType>(); | ||||||
11131 | bool AnyNoexcept = HasNoexcept(FPT->getReturnType()); | ||||||
11132 | for (QualType T : FPT->param_types()) | ||||||
11133 | AnyNoexcept |= HasNoexcept(T); | ||||||
11134 | if (AnyNoexcept) | ||||||
11135 | Diag(NewFD->getLocation(), | ||||||
11136 | diag::warn_cxx17_compat_exception_spec_in_signature) | ||||||
11137 | << NewFD; | ||||||
11138 | } | ||||||
11139 | |||||||
11140 | if (!Redeclaration && LangOpts.CUDA) | ||||||
11141 | checkCUDATargetOverload(NewFD, Previous); | ||||||
11142 | } | ||||||
11143 | return Redeclaration; | ||||||
11144 | } | ||||||
11145 | |||||||
11146 | void Sema::CheckMain(FunctionDecl* FD, const DeclSpec& DS) { | ||||||
11147 | // C++11 [basic.start.main]p3: | ||||||
11148 | // A program that [...] declares main to be inline, static or | ||||||
11149 | // constexpr is ill-formed. | ||||||
11150 | // C11 6.7.4p4: In a hosted environment, no function specifier(s) shall | ||||||
11151 | // appear in a declaration of main. | ||||||
11152 | // static main is not an error under C99, but we should warn about it. | ||||||
11153 | // We accept _Noreturn main as an extension. | ||||||
11154 | if (FD->getStorageClass() == SC_Static) | ||||||
11155 | Diag(DS.getStorageClassSpecLoc(), getLangOpts().CPlusPlus | ||||||
11156 | ? diag::err_static_main : diag::warn_static_main) | ||||||
11157 | << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); | ||||||
11158 | if (FD->isInlineSpecified()) | ||||||
11159 | Diag(DS.getInlineSpecLoc(), diag::err_inline_main) | ||||||
11160 | << FixItHint::CreateRemoval(DS.getInlineSpecLoc()); | ||||||
11161 | if (DS.isNoreturnSpecified()) { | ||||||
11162 | SourceLocation NoreturnLoc = DS.getNoreturnSpecLoc(); | ||||||
11163 | SourceRange NoreturnRange(NoreturnLoc, getLocForEndOfToken(NoreturnLoc)); | ||||||
11164 | Diag(NoreturnLoc, diag::ext_noreturn_main); | ||||||
11165 | Diag(NoreturnLoc, diag::note_main_remove_noreturn) | ||||||
11166 | << FixItHint::CreateRemoval(NoreturnRange); | ||||||
11167 | } | ||||||
11168 | if (FD->isConstexpr()) { | ||||||
11169 | Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_main) | ||||||
11170 | << FD->isConsteval() | ||||||
11171 | << FixItHint::CreateRemoval(DS.getConstexprSpecLoc()); | ||||||
11172 | FD->setConstexprKind(ConstexprSpecKind::Unspecified); | ||||||
11173 | } | ||||||
11174 | |||||||
11175 | if (getLangOpts().OpenCL) { | ||||||
11176 | Diag(FD->getLocation(), diag::err_opencl_no_main) | ||||||
11177 | << FD->hasAttr<OpenCLKernelAttr>(); | ||||||
11178 | FD->setInvalidDecl(); | ||||||
11179 | return; | ||||||
11180 | } | ||||||
11181 | |||||||
11182 | QualType T = FD->getType(); | ||||||
11183 | assert(T->isFunctionType() && "function decl is not of function type")(static_cast <bool> (T->isFunctionType() && "function decl is not of function type" ) ? void (0) : __assert_fail ("T->isFunctionType() && \"function decl is not of function type\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11183, __extension__ __PRETTY_FUNCTION__)); | ||||||
11184 | const FunctionType* FT = T->castAs<FunctionType>(); | ||||||
11185 | |||||||
11186 | // Set default calling convention for main() | ||||||
11187 | if (FT->getCallConv() != CC_C) { | ||||||
11188 | FT = Context.adjustFunctionType(FT, FT->getExtInfo().withCallingConv(CC_C)); | ||||||
11189 | FD->setType(QualType(FT, 0)); | ||||||
11190 | T = Context.getCanonicalType(FD->getType()); | ||||||
11191 | } | ||||||
11192 | |||||||
11193 | if (getLangOpts().GNUMode && !getLangOpts().CPlusPlus) { | ||||||
11194 | // In C with GNU extensions we allow main() to have non-integer return | ||||||
11195 | // type, but we should warn about the extension, and we disable the | ||||||
11196 | // implicit-return-zero rule. | ||||||
11197 | |||||||
11198 | // GCC in C mode accepts qualified 'int'. | ||||||
11199 | if (Context.hasSameUnqualifiedType(FT->getReturnType(), Context.IntTy)) | ||||||
11200 | FD->setHasImplicitReturnZero(true); | ||||||
11201 | else { | ||||||
11202 | Diag(FD->getTypeSpecStartLoc(), diag::ext_main_returns_nonint); | ||||||
11203 | SourceRange RTRange = FD->getReturnTypeSourceRange(); | ||||||
11204 | if (RTRange.isValid()) | ||||||
11205 | Diag(RTRange.getBegin(), diag::note_main_change_return_type) | ||||||
11206 | << FixItHint::CreateReplacement(RTRange, "int"); | ||||||
11207 | } | ||||||
11208 | } else { | ||||||
11209 | // In C and C++, main magically returns 0 if you fall off the end; | ||||||
11210 | // set the flag which tells us that. | ||||||
11211 | // This is C++ [basic.start.main]p5 and C99 5.1.2.2.3. | ||||||
11212 | |||||||
11213 | // All the standards say that main() should return 'int'. | ||||||
11214 | if (Context.hasSameType(FT->getReturnType(), Context.IntTy)) | ||||||
11215 | FD->setHasImplicitReturnZero(true); | ||||||
11216 | else { | ||||||
11217 | // Otherwise, this is just a flat-out error. | ||||||
11218 | SourceRange RTRange = FD->getReturnTypeSourceRange(); | ||||||
11219 | Diag(FD->getTypeSpecStartLoc(), diag::err_main_returns_nonint) | ||||||
11220 | << (RTRange.isValid() ? FixItHint::CreateReplacement(RTRange, "int") | ||||||
11221 | : FixItHint()); | ||||||
11222 | FD->setInvalidDecl(true); | ||||||
11223 | } | ||||||
11224 | } | ||||||
11225 | |||||||
11226 | // Treat protoless main() as nullary. | ||||||
11227 | if (isa<FunctionNoProtoType>(FT)) return; | ||||||
11228 | |||||||
11229 | const FunctionProtoType* FTP = cast<const FunctionProtoType>(FT); | ||||||
11230 | unsigned nparams = FTP->getNumParams(); | ||||||
11231 | assert(FD->getNumParams() == nparams)(static_cast <bool> (FD->getNumParams() == nparams) ? void (0) : __assert_fail ("FD->getNumParams() == nparams" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11231, __extension__ __PRETTY_FUNCTION__)); | ||||||
11232 | |||||||
11233 | bool HasExtraParameters = (nparams > 3); | ||||||
11234 | |||||||
11235 | if (FTP->isVariadic()) { | ||||||
11236 | Diag(FD->getLocation(), diag::ext_variadic_main); | ||||||
11237 | // FIXME: if we had information about the location of the ellipsis, we | ||||||
11238 | // could add a FixIt hint to remove it as a parameter. | ||||||
11239 | } | ||||||
11240 | |||||||
11241 | // Darwin passes an undocumented fourth argument of type char**. If | ||||||
11242 | // other platforms start sprouting these, the logic below will start | ||||||
11243 | // getting shifty. | ||||||
11244 | if (nparams == 4 && Context.getTargetInfo().getTriple().isOSDarwin()) | ||||||
11245 | HasExtraParameters = false; | ||||||
11246 | |||||||
11247 | if (HasExtraParameters) { | ||||||
11248 | Diag(FD->getLocation(), diag::err_main_surplus_args) << nparams; | ||||||
11249 | FD->setInvalidDecl(true); | ||||||
11250 | nparams = 3; | ||||||
11251 | } | ||||||
11252 | |||||||
11253 | // FIXME: a lot of the following diagnostics would be improved | ||||||
11254 | // if we had some location information about types. | ||||||
11255 | |||||||
11256 | QualType CharPP = | ||||||
11257 | Context.getPointerType(Context.getPointerType(Context.CharTy)); | ||||||
11258 | QualType Expected[] = { Context.IntTy, CharPP, CharPP, CharPP }; | ||||||
11259 | |||||||
11260 | for (unsigned i = 0; i < nparams; ++i) { | ||||||
11261 | QualType AT = FTP->getParamType(i); | ||||||
11262 | |||||||
11263 | bool mismatch = true; | ||||||
11264 | |||||||
11265 | if (Context.hasSameUnqualifiedType(AT, Expected[i])) | ||||||
11266 | mismatch = false; | ||||||
11267 | else if (Expected[i] == CharPP) { | ||||||
11268 | // As an extension, the following forms are okay: | ||||||
11269 | // char const ** | ||||||
11270 | // char const * const * | ||||||
11271 | // char * const * | ||||||
11272 | |||||||
11273 | QualifierCollector qs; | ||||||
11274 | const PointerType* PT; | ||||||
11275 | if ((PT = qs.strip(AT)->getAs<PointerType>()) && | ||||||
11276 | (PT = qs.strip(PT->getPointeeType())->getAs<PointerType>()) && | ||||||
11277 | Context.hasSameType(QualType(qs.strip(PT->getPointeeType()), 0), | ||||||
11278 | Context.CharTy)) { | ||||||
11279 | qs.removeConst(); | ||||||
11280 | mismatch = !qs.empty(); | ||||||
11281 | } | ||||||
11282 | } | ||||||
11283 | |||||||
11284 | if (mismatch) { | ||||||
11285 | Diag(FD->getLocation(), diag::err_main_arg_wrong) << i << Expected[i]; | ||||||
11286 | // TODO: suggest replacing given type with expected type | ||||||
11287 | FD->setInvalidDecl(true); | ||||||
11288 | } | ||||||
11289 | } | ||||||
11290 | |||||||
11291 | if (nparams == 1 && !FD->isInvalidDecl()) { | ||||||
11292 | Diag(FD->getLocation(), diag::warn_main_one_arg); | ||||||
11293 | } | ||||||
11294 | |||||||
11295 | if (!FD->isInvalidDecl() && FD->getDescribedFunctionTemplate()) { | ||||||
11296 | Diag(FD->getLocation(), diag::err_mainlike_template_decl) << FD; | ||||||
11297 | FD->setInvalidDecl(); | ||||||
11298 | } | ||||||
11299 | } | ||||||
11300 | |||||||
11301 | static bool isDefaultStdCall(FunctionDecl *FD, Sema &S) { | ||||||
11302 | |||||||
11303 | // Default calling convention for main and wmain is __cdecl | ||||||
11304 | if (FD->getName() == "main" || FD->getName() == "wmain") | ||||||
11305 | return false; | ||||||
11306 | |||||||
11307 | // Default calling convention for MinGW is __cdecl | ||||||
11308 | const llvm::Triple &T = S.Context.getTargetInfo().getTriple(); | ||||||
11309 | if (T.isWindowsGNUEnvironment()) | ||||||
11310 | return false; | ||||||
11311 | |||||||
11312 | // Default calling convention for WinMain, wWinMain and DllMain | ||||||
11313 | // is __stdcall on 32 bit Windows | ||||||
11314 | if (T.isOSWindows() && T.getArch() == llvm::Triple::x86) | ||||||
11315 | return true; | ||||||
11316 | |||||||
11317 | return false; | ||||||
11318 | } | ||||||
11319 | |||||||
11320 | void Sema::CheckMSVCRTEntryPoint(FunctionDecl *FD) { | ||||||
11321 | QualType T = FD->getType(); | ||||||
11322 | assert(T->isFunctionType() && "function decl is not of function type")(static_cast <bool> (T->isFunctionType() && "function decl is not of function type" ) ? void (0) : __assert_fail ("T->isFunctionType() && \"function decl is not of function type\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11322, __extension__ __PRETTY_FUNCTION__)); | ||||||
11323 | const FunctionType *FT = T->castAs<FunctionType>(); | ||||||
11324 | |||||||
11325 | // Set an implicit return of 'zero' if the function can return some integral, | ||||||
11326 | // enumeration, pointer or nullptr type. | ||||||
11327 | if (FT->getReturnType()->isIntegralOrEnumerationType() || | ||||||
11328 | FT->getReturnType()->isAnyPointerType() || | ||||||
11329 | FT->getReturnType()->isNullPtrType()) | ||||||
11330 | // DllMain is exempt because a return value of zero means it failed. | ||||||
11331 | if (FD->getName() != "DllMain") | ||||||
11332 | FD->setHasImplicitReturnZero(true); | ||||||
11333 | |||||||
11334 | // Explicity specified calling conventions are applied to MSVC entry points | ||||||
11335 | if (!hasExplicitCallingConv(T)) { | ||||||
11336 | if (isDefaultStdCall(FD, *this)) { | ||||||
11337 | if (FT->getCallConv() != CC_X86StdCall) { | ||||||
11338 | FT = Context.adjustFunctionType( | ||||||
11339 | FT, FT->getExtInfo().withCallingConv(CC_X86StdCall)); | ||||||
11340 | FD->setType(QualType(FT, 0)); | ||||||
11341 | } | ||||||
11342 | } else if (FT->getCallConv() != CC_C) { | ||||||
11343 | FT = Context.adjustFunctionType(FT, | ||||||
11344 | FT->getExtInfo().withCallingConv(CC_C)); | ||||||
11345 | FD->setType(QualType(FT, 0)); | ||||||
11346 | } | ||||||
11347 | } | ||||||
11348 | |||||||
11349 | if (!FD->isInvalidDecl() && FD->getDescribedFunctionTemplate()) { | ||||||
11350 | Diag(FD->getLocation(), diag::err_mainlike_template_decl) << FD; | ||||||
11351 | FD->setInvalidDecl(); | ||||||
11352 | } | ||||||
11353 | } | ||||||
11354 | |||||||
11355 | bool Sema::CheckForConstantInitializer(Expr *Init, QualType DclT) { | ||||||
11356 | // FIXME: Need strict checking. In C89, we need to check for | ||||||
11357 | // any assignment, increment, decrement, function-calls, or | ||||||
11358 | // commas outside of a sizeof. In C99, it's the same list, | ||||||
11359 | // except that the aforementioned are allowed in unevaluated | ||||||
11360 | // expressions. Everything else falls under the | ||||||
11361 | // "may accept other forms of constant expressions" exception. | ||||||
11362 | // | ||||||
11363 | // Regular C++ code will not end up here (exceptions: language extensions, | ||||||
11364 | // OpenCL C++ etc), so the constant expression rules there don't matter. | ||||||
11365 | if (Init->isValueDependent()) { | ||||||
11366 | assert(Init->containsErrors() &&(static_cast <bool> (Init->containsErrors() && "Dependent code should only occur in error-recovery path.") ? void (0) : __assert_fail ("Init->containsErrors() && \"Dependent code should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11367, __extension__ __PRETTY_FUNCTION__)) | ||||||
11367 | "Dependent code should only occur in error-recovery path.")(static_cast <bool> (Init->containsErrors() && "Dependent code should only occur in error-recovery path.") ? void (0) : __assert_fail ("Init->containsErrors() && \"Dependent code should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11367, __extension__ __PRETTY_FUNCTION__)); | ||||||
11368 | return true; | ||||||
11369 | } | ||||||
11370 | const Expr *Culprit; | ||||||
11371 | if (Init->isConstantInitializer(Context, false, &Culprit)) | ||||||
11372 | return false; | ||||||
11373 | Diag(Culprit->getExprLoc(), diag::err_init_element_not_constant) | ||||||
11374 | << Culprit->getSourceRange(); | ||||||
11375 | return true; | ||||||
11376 | } | ||||||
11377 | |||||||
11378 | namespace { | ||||||
11379 | // Visits an initialization expression to see if OrigDecl is evaluated in | ||||||
11380 | // its own initialization and throws a warning if it does. | ||||||
11381 | class SelfReferenceChecker | ||||||
11382 | : public EvaluatedExprVisitor<SelfReferenceChecker> { | ||||||
11383 | Sema &S; | ||||||
11384 | Decl *OrigDecl; | ||||||
11385 | bool isRecordType; | ||||||
11386 | bool isPODType; | ||||||
11387 | bool isReferenceType; | ||||||
11388 | |||||||
11389 | bool isInitList; | ||||||
11390 | llvm::SmallVector<unsigned, 4> InitFieldIndex; | ||||||
11391 | |||||||
11392 | public: | ||||||
11393 | typedef EvaluatedExprVisitor<SelfReferenceChecker> Inherited; | ||||||
11394 | |||||||
11395 | SelfReferenceChecker(Sema &S, Decl *OrigDecl) : Inherited(S.Context), | ||||||
11396 | S(S), OrigDecl(OrigDecl) { | ||||||
11397 | isPODType = false; | ||||||
11398 | isRecordType = false; | ||||||
11399 | isReferenceType = false; | ||||||
11400 | isInitList = false; | ||||||
11401 | if (ValueDecl *VD = dyn_cast<ValueDecl>(OrigDecl)) { | ||||||
11402 | isPODType = VD->getType().isPODType(S.Context); | ||||||
11403 | isRecordType = VD->getType()->isRecordType(); | ||||||
11404 | isReferenceType = VD->getType()->isReferenceType(); | ||||||
11405 | } | ||||||
11406 | } | ||||||
11407 | |||||||
11408 | // For most expressions, just call the visitor. For initializer lists, | ||||||
11409 | // track the index of the field being initialized since fields are | ||||||
11410 | // initialized in order allowing use of previously initialized fields. | ||||||
11411 | void CheckExpr(Expr *E) { | ||||||
11412 | InitListExpr *InitList = dyn_cast<InitListExpr>(E); | ||||||
11413 | if (!InitList) { | ||||||
11414 | Visit(E); | ||||||
11415 | return; | ||||||
11416 | } | ||||||
11417 | |||||||
11418 | // Track and increment the index here. | ||||||
11419 | isInitList = true; | ||||||
11420 | InitFieldIndex.push_back(0); | ||||||
11421 | for (auto Child : InitList->children()) { | ||||||
11422 | CheckExpr(cast<Expr>(Child)); | ||||||
11423 | ++InitFieldIndex.back(); | ||||||
11424 | } | ||||||
11425 | InitFieldIndex.pop_back(); | ||||||
11426 | } | ||||||
11427 | |||||||
11428 | // Returns true if MemberExpr is checked and no further checking is needed. | ||||||
11429 | // Returns false if additional checking is required. | ||||||
11430 | bool CheckInitListMemberExpr(MemberExpr *E, bool CheckReference) { | ||||||
11431 | llvm::SmallVector<FieldDecl*, 4> Fields; | ||||||
11432 | Expr *Base = E; | ||||||
11433 | bool ReferenceField = false; | ||||||
11434 | |||||||
11435 | // Get the field members used. | ||||||
11436 | while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) { | ||||||
11437 | FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl()); | ||||||
11438 | if (!FD) | ||||||
11439 | return false; | ||||||
11440 | Fields.push_back(FD); | ||||||
11441 | if (FD->getType()->isReferenceType()) | ||||||
11442 | ReferenceField = true; | ||||||
11443 | Base = ME->getBase()->IgnoreParenImpCasts(); | ||||||
11444 | } | ||||||
11445 | |||||||
11446 | // Keep checking only if the base Decl is the same. | ||||||
11447 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base); | ||||||
11448 | if (!DRE || DRE->getDecl() != OrigDecl) | ||||||
11449 | return false; | ||||||
11450 | |||||||
11451 | // A reference field can be bound to an unininitialized field. | ||||||
11452 | if (CheckReference && !ReferenceField) | ||||||
11453 | return true; | ||||||
11454 | |||||||
11455 | // Convert FieldDecls to their index number. | ||||||
11456 | llvm::SmallVector<unsigned, 4> UsedFieldIndex; | ||||||
11457 | for (const FieldDecl *I : llvm::reverse(Fields)) | ||||||
11458 | UsedFieldIndex.push_back(I->getFieldIndex()); | ||||||
11459 | |||||||
11460 | // See if a warning is needed by checking the first difference in index | ||||||
11461 | // numbers. If field being used has index less than the field being | ||||||
11462 | // initialized, then the use is safe. | ||||||
11463 | for (auto UsedIter = UsedFieldIndex.begin(), | ||||||
11464 | UsedEnd = UsedFieldIndex.end(), | ||||||
11465 | OrigIter = InitFieldIndex.begin(), | ||||||
11466 | OrigEnd = InitFieldIndex.end(); | ||||||
11467 | UsedIter != UsedEnd && OrigIter != OrigEnd; ++UsedIter, ++OrigIter) { | ||||||
11468 | if (*UsedIter < *OrigIter) | ||||||
11469 | return true; | ||||||
11470 | if (*UsedIter > *OrigIter) | ||||||
11471 | break; | ||||||
11472 | } | ||||||
11473 | |||||||
11474 | // TODO: Add a different warning which will print the field names. | ||||||
11475 | HandleDeclRefExpr(DRE); | ||||||
11476 | return true; | ||||||
11477 | } | ||||||
11478 | |||||||
11479 | // For most expressions, the cast is directly above the DeclRefExpr. | ||||||
11480 | // For conditional operators, the cast can be outside the conditional | ||||||
11481 | // operator if both expressions are DeclRefExpr's. | ||||||
11482 | void HandleValue(Expr *E) { | ||||||
11483 | E = E->IgnoreParens(); | ||||||
11484 | if (DeclRefExpr* DRE = dyn_cast<DeclRefExpr>(E)) { | ||||||
11485 | HandleDeclRefExpr(DRE); | ||||||
11486 | return; | ||||||
11487 | } | ||||||
11488 | |||||||
11489 | if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) { | ||||||
11490 | Visit(CO->getCond()); | ||||||
11491 | HandleValue(CO->getTrueExpr()); | ||||||
11492 | HandleValue(CO->getFalseExpr()); | ||||||
11493 | return; | ||||||
11494 | } | ||||||
11495 | |||||||
11496 | if (BinaryConditionalOperator *BCO = | ||||||
11497 | dyn_cast<BinaryConditionalOperator>(E)) { | ||||||
11498 | Visit(BCO->getCond()); | ||||||
11499 | HandleValue(BCO->getFalseExpr()); | ||||||
11500 | return; | ||||||
11501 | } | ||||||
11502 | |||||||
11503 | if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(E)) { | ||||||
11504 | HandleValue(OVE->getSourceExpr()); | ||||||
11505 | return; | ||||||
11506 | } | ||||||
11507 | |||||||
11508 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | ||||||
11509 | if (BO->getOpcode() == BO_Comma) { | ||||||
11510 | Visit(BO->getLHS()); | ||||||
11511 | HandleValue(BO->getRHS()); | ||||||
11512 | return; | ||||||
11513 | } | ||||||
11514 | } | ||||||
11515 | |||||||
11516 | if (isa<MemberExpr>(E)) { | ||||||
11517 | if (isInitList) { | ||||||
11518 | if (CheckInitListMemberExpr(cast<MemberExpr>(E), | ||||||
11519 | false /*CheckReference*/)) | ||||||
11520 | return; | ||||||
11521 | } | ||||||
11522 | |||||||
11523 | Expr *Base = E->IgnoreParenImpCasts(); | ||||||
11524 | while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) { | ||||||
11525 | // Check for static member variables and don't warn on them. | ||||||
11526 | if (!isa<FieldDecl>(ME->getMemberDecl())) | ||||||
11527 | return; | ||||||
11528 | Base = ME->getBase()->IgnoreParenImpCasts(); | ||||||
11529 | } | ||||||
11530 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) | ||||||
11531 | HandleDeclRefExpr(DRE); | ||||||
11532 | return; | ||||||
11533 | } | ||||||
11534 | |||||||
11535 | Visit(E); | ||||||
11536 | } | ||||||
11537 | |||||||
11538 | // Reference types not handled in HandleValue are handled here since all | ||||||
11539 | // uses of references are bad, not just r-value uses. | ||||||
11540 | void VisitDeclRefExpr(DeclRefExpr *E) { | ||||||
11541 | if (isReferenceType) | ||||||
11542 | HandleDeclRefExpr(E); | ||||||
11543 | } | ||||||
11544 | |||||||
11545 | void VisitImplicitCastExpr(ImplicitCastExpr *E) { | ||||||
11546 | if (E->getCastKind() == CK_LValueToRValue) { | ||||||
11547 | HandleValue(E->getSubExpr()); | ||||||
11548 | return; | ||||||
11549 | } | ||||||
11550 | |||||||
11551 | Inherited::VisitImplicitCastExpr(E); | ||||||
11552 | } | ||||||
11553 | |||||||
11554 | void VisitMemberExpr(MemberExpr *E) { | ||||||
11555 | if (isInitList) { | ||||||
11556 | if (CheckInitListMemberExpr(E, true /*CheckReference*/)) | ||||||
11557 | return; | ||||||
11558 | } | ||||||
11559 | |||||||
11560 | // Don't warn on arrays since they can be treated as pointers. | ||||||
11561 | if (E->getType()->canDecayToPointerType()) return; | ||||||
11562 | |||||||
11563 | // Warn when a non-static method call is followed by non-static member | ||||||
11564 | // field accesses, which is followed by a DeclRefExpr. | ||||||
11565 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(E->getMemberDecl()); | ||||||
11566 | bool Warn = (MD && !MD->isStatic()); | ||||||
11567 | Expr *Base = E->getBase()->IgnoreParenImpCasts(); | ||||||
11568 | while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) { | ||||||
11569 | if (!isa<FieldDecl>(ME->getMemberDecl())) | ||||||
11570 | Warn = false; | ||||||
11571 | Base = ME->getBase()->IgnoreParenImpCasts(); | ||||||
11572 | } | ||||||
11573 | |||||||
11574 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) { | ||||||
11575 | if (Warn) | ||||||
11576 | HandleDeclRefExpr(DRE); | ||||||
11577 | return; | ||||||
11578 | } | ||||||
11579 | |||||||
11580 | // The base of a MemberExpr is not a MemberExpr or a DeclRefExpr. | ||||||
11581 | // Visit that expression. | ||||||
11582 | Visit(Base); | ||||||
11583 | } | ||||||
11584 | |||||||
11585 | void VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) { | ||||||
11586 | Expr *Callee = E->getCallee(); | ||||||
11587 | |||||||
11588 | if (isa<UnresolvedLookupExpr>(Callee)) | ||||||
11589 | return Inherited::VisitCXXOperatorCallExpr(E); | ||||||
11590 | |||||||
11591 | Visit(Callee); | ||||||
11592 | for (auto Arg: E->arguments()) | ||||||
11593 | HandleValue(Arg->IgnoreParenImpCasts()); | ||||||
11594 | } | ||||||
11595 | |||||||
11596 | void VisitUnaryOperator(UnaryOperator *E) { | ||||||
11597 | // For POD record types, addresses of its own members are well-defined. | ||||||
11598 | if (E->getOpcode() == UO_AddrOf && isRecordType && | ||||||
11599 | isa<MemberExpr>(E->getSubExpr()->IgnoreParens())) { | ||||||
11600 | if (!isPODType) | ||||||
11601 | HandleValue(E->getSubExpr()); | ||||||
11602 | return; | ||||||
11603 | } | ||||||
11604 | |||||||
11605 | if (E->isIncrementDecrementOp()) { | ||||||
11606 | HandleValue(E->getSubExpr()); | ||||||
11607 | return; | ||||||
11608 | } | ||||||
11609 | |||||||
11610 | Inherited::VisitUnaryOperator(E); | ||||||
11611 | } | ||||||
11612 | |||||||
11613 | void VisitObjCMessageExpr(ObjCMessageExpr *E) {} | ||||||
11614 | |||||||
11615 | void VisitCXXConstructExpr(CXXConstructExpr *E) { | ||||||
11616 | if (E->getConstructor()->isCopyConstructor()) { | ||||||
11617 | Expr *ArgExpr = E->getArg(0); | ||||||
11618 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(ArgExpr)) | ||||||
11619 | if (ILE->getNumInits() == 1) | ||||||
11620 | ArgExpr = ILE->getInit(0); | ||||||
11621 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgExpr)) | ||||||
11622 | if (ICE->getCastKind() == CK_NoOp) | ||||||
11623 | ArgExpr = ICE->getSubExpr(); | ||||||
11624 | HandleValue(ArgExpr); | ||||||
11625 | return; | ||||||
11626 | } | ||||||
11627 | Inherited::VisitCXXConstructExpr(E); | ||||||
11628 | } | ||||||
11629 | |||||||
11630 | void VisitCallExpr(CallExpr *E) { | ||||||
11631 | // Treat std::move as a use. | ||||||
11632 | if (E->isCallToStdMove()) { | ||||||
11633 | HandleValue(E->getArg(0)); | ||||||
11634 | return; | ||||||
11635 | } | ||||||
11636 | |||||||
11637 | Inherited::VisitCallExpr(E); | ||||||
11638 | } | ||||||
11639 | |||||||
11640 | void VisitBinaryOperator(BinaryOperator *E) { | ||||||
11641 | if (E->isCompoundAssignmentOp()) { | ||||||
11642 | HandleValue(E->getLHS()); | ||||||
11643 | Visit(E->getRHS()); | ||||||
11644 | return; | ||||||
11645 | } | ||||||
11646 | |||||||
11647 | Inherited::VisitBinaryOperator(E); | ||||||
11648 | } | ||||||
11649 | |||||||
11650 | // A custom visitor for BinaryConditionalOperator is needed because the | ||||||
11651 | // regular visitor would check the condition and true expression separately | ||||||
11652 | // but both point to the same place giving duplicate diagnostics. | ||||||
11653 | void VisitBinaryConditionalOperator(BinaryConditionalOperator *E) { | ||||||
11654 | Visit(E->getCond()); | ||||||
11655 | Visit(E->getFalseExpr()); | ||||||
11656 | } | ||||||
11657 | |||||||
11658 | void HandleDeclRefExpr(DeclRefExpr *DRE) { | ||||||
11659 | Decl* ReferenceDecl = DRE->getDecl(); | ||||||
11660 | if (OrigDecl != ReferenceDecl) return; | ||||||
11661 | unsigned diag; | ||||||
11662 | if (isReferenceType) { | ||||||
11663 | diag = diag::warn_uninit_self_reference_in_reference_init; | ||||||
11664 | } else if (cast<VarDecl>(OrigDecl)->isStaticLocal()) { | ||||||
11665 | diag = diag::warn_static_self_reference_in_init; | ||||||
11666 | } else if (isa<TranslationUnitDecl>(OrigDecl->getDeclContext()) || | ||||||
11667 | isa<NamespaceDecl>(OrigDecl->getDeclContext()) || | ||||||
11668 | DRE->getDecl()->getType()->isRecordType()) { | ||||||
11669 | diag = diag::warn_uninit_self_reference_in_init; | ||||||
11670 | } else { | ||||||
11671 | // Local variables will be handled by the CFG analysis. | ||||||
11672 | return; | ||||||
11673 | } | ||||||
11674 | |||||||
11675 | S.DiagRuntimeBehavior(DRE->getBeginLoc(), DRE, | ||||||
11676 | S.PDiag(diag) | ||||||
11677 | << DRE->getDecl() << OrigDecl->getLocation() | ||||||
11678 | << DRE->getSourceRange()); | ||||||
11679 | } | ||||||
11680 | }; | ||||||
11681 | |||||||
11682 | /// CheckSelfReference - Warns if OrigDecl is used in expression E. | ||||||
11683 | static void CheckSelfReference(Sema &S, Decl* OrigDecl, Expr *E, | ||||||
11684 | bool DirectInit) { | ||||||
11685 | // Parameters arguments are occassionially constructed with itself, | ||||||
11686 | // for instance, in recursive functions. Skip them. | ||||||
11687 | if (isa<ParmVarDecl>(OrigDecl)) | ||||||
11688 | return; | ||||||
11689 | |||||||
11690 | E = E->IgnoreParens(); | ||||||
11691 | |||||||
11692 | // Skip checking T a = a where T is not a record or reference type. | ||||||
11693 | // Doing so is a way to silence uninitialized warnings. | ||||||
11694 | if (!DirectInit && !cast<VarDecl>(OrigDecl)->getType()->isRecordType()) | ||||||
11695 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) | ||||||
11696 | if (ICE->getCastKind() == CK_LValueToRValue) | ||||||
11697 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr())) | ||||||
11698 | if (DRE->getDecl() == OrigDecl) | ||||||
11699 | return; | ||||||
11700 | |||||||
11701 | SelfReferenceChecker(S, OrigDecl).CheckExpr(E); | ||||||
11702 | } | ||||||
11703 | } // end anonymous namespace | ||||||
11704 | |||||||
11705 | namespace { | ||||||
11706 | // Simple wrapper to add the name of a variable or (if no variable is | ||||||
11707 | // available) a DeclarationName into a diagnostic. | ||||||
11708 | struct VarDeclOrName { | ||||||
11709 | VarDecl *VDecl; | ||||||
11710 | DeclarationName Name; | ||||||
11711 | |||||||
11712 | friend const Sema::SemaDiagnosticBuilder & | ||||||
11713 | operator<<(const Sema::SemaDiagnosticBuilder &Diag, VarDeclOrName VN) { | ||||||
11714 | return VN.VDecl ? Diag << VN.VDecl : Diag << VN.Name; | ||||||
11715 | } | ||||||
11716 | }; | ||||||
11717 | } // end anonymous namespace | ||||||
11718 | |||||||
11719 | QualType Sema::deduceVarTypeFromInitializer(VarDecl *VDecl, | ||||||
11720 | DeclarationName Name, QualType Type, | ||||||
11721 | TypeSourceInfo *TSI, | ||||||
11722 | SourceRange Range, bool DirectInit, | ||||||
11723 | Expr *Init) { | ||||||
11724 | bool IsInitCapture = !VDecl; | ||||||
11725 | assert((!VDecl || !VDecl->isInitCapture()) &&(static_cast <bool> ((!VDecl || !VDecl->isInitCapture ()) && "init captures are expected to be deduced prior to initialization" ) ? void (0) : __assert_fail ("(!VDecl || !VDecl->isInitCapture()) && \"init captures are expected to be deduced prior to initialization\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11726, __extension__ __PRETTY_FUNCTION__)) | ||||||
11726 | "init captures are expected to be deduced prior to initialization")(static_cast <bool> ((!VDecl || !VDecl->isInitCapture ()) && "init captures are expected to be deduced prior to initialization" ) ? void (0) : __assert_fail ("(!VDecl || !VDecl->isInitCapture()) && \"init captures are expected to be deduced prior to initialization\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11726, __extension__ __PRETTY_FUNCTION__)); | ||||||
11727 | |||||||
11728 | VarDeclOrName VN{VDecl, Name}; | ||||||
11729 | |||||||
11730 | DeducedType *Deduced = Type->getContainedDeducedType(); | ||||||
11731 | assert(Deduced && "deduceVarTypeFromInitializer for non-deduced type")(static_cast <bool> (Deduced && "deduceVarTypeFromInitializer for non-deduced type" ) ? void (0) : __assert_fail ("Deduced && \"deduceVarTypeFromInitializer for non-deduced type\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11731, __extension__ __PRETTY_FUNCTION__)); | ||||||
11732 | |||||||
11733 | // C++11 [dcl.spec.auto]p3 | ||||||
11734 | if (!Init) { | ||||||
11735 | assert(VDecl && "no init for init capture deduction?")(static_cast <bool> (VDecl && "no init for init capture deduction?" ) ? void (0) : __assert_fail ("VDecl && \"no init for init capture deduction?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11735, __extension__ __PRETTY_FUNCTION__)); | ||||||
11736 | |||||||
11737 | // Except for class argument deduction, and then for an initializing | ||||||
11738 | // declaration only, i.e. no static at class scope or extern. | ||||||
11739 | if (!isa<DeducedTemplateSpecializationType>(Deduced) || | ||||||
11740 | VDecl->hasExternalStorage() || | ||||||
11741 | VDecl->isStaticDataMember()) { | ||||||
11742 | Diag(VDecl->getLocation(), diag::err_auto_var_requires_init) | ||||||
11743 | << VDecl->getDeclName() << Type; | ||||||
11744 | return QualType(); | ||||||
11745 | } | ||||||
11746 | } | ||||||
11747 | |||||||
11748 | ArrayRef<Expr*> DeduceInits; | ||||||
11749 | if (Init) | ||||||
11750 | DeduceInits = Init; | ||||||
11751 | |||||||
11752 | if (DirectInit) { | ||||||
11753 | if (auto *PL = dyn_cast_or_null<ParenListExpr>(Init)) | ||||||
11754 | DeduceInits = PL->exprs(); | ||||||
11755 | } | ||||||
11756 | |||||||
11757 | if (isa<DeducedTemplateSpecializationType>(Deduced)) { | ||||||
11758 | assert(VDecl && "non-auto type for init capture deduction?")(static_cast <bool> (VDecl && "non-auto type for init capture deduction?" ) ? void (0) : __assert_fail ("VDecl && \"non-auto type for init capture deduction?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11758, __extension__ __PRETTY_FUNCTION__)); | ||||||
11759 | InitializedEntity Entity = InitializedEntity::InitializeVariable(VDecl); | ||||||
11760 | InitializationKind Kind = InitializationKind::CreateForInit( | ||||||
11761 | VDecl->getLocation(), DirectInit, Init); | ||||||
11762 | // FIXME: Initialization should not be taking a mutable list of inits. | ||||||
11763 | SmallVector<Expr*, 8> InitsCopy(DeduceInits.begin(), DeduceInits.end()); | ||||||
11764 | return DeduceTemplateSpecializationFromInitializer(TSI, Entity, Kind, | ||||||
11765 | InitsCopy); | ||||||
11766 | } | ||||||
11767 | |||||||
11768 | if (DirectInit) { | ||||||
11769 | if (auto *IL = dyn_cast<InitListExpr>(Init)) | ||||||
11770 | DeduceInits = IL->inits(); | ||||||
11771 | } | ||||||
11772 | |||||||
11773 | // Deduction only works if we have exactly one source expression. | ||||||
11774 | if (DeduceInits.empty()) { | ||||||
11775 | // It isn't possible to write this directly, but it is possible to | ||||||
11776 | // end up in this situation with "auto x(some_pack...);" | ||||||
11777 | Diag(Init->getBeginLoc(), IsInitCapture | ||||||
11778 | ? diag::err_init_capture_no_expression | ||||||
11779 | : diag::err_auto_var_init_no_expression) | ||||||
11780 | << VN << Type << Range; | ||||||
11781 | return QualType(); | ||||||
11782 | } | ||||||
11783 | |||||||
11784 | if (DeduceInits.size() > 1) { | ||||||
11785 | Diag(DeduceInits[1]->getBeginLoc(), | ||||||
11786 | IsInitCapture ? diag::err_init_capture_multiple_expressions | ||||||
11787 | : diag::err_auto_var_init_multiple_expressions) | ||||||
11788 | << VN << Type << Range; | ||||||
11789 | return QualType(); | ||||||
11790 | } | ||||||
11791 | |||||||
11792 | Expr *DeduceInit = DeduceInits[0]; | ||||||
11793 | if (DirectInit && isa<InitListExpr>(DeduceInit)) { | ||||||
11794 | Diag(Init->getBeginLoc(), IsInitCapture | ||||||
11795 | ? diag::err_init_capture_paren_braces | ||||||
11796 | : diag::err_auto_var_init_paren_braces) | ||||||
11797 | << isa<InitListExpr>(Init) << VN << Type << Range; | ||||||
11798 | return QualType(); | ||||||
11799 | } | ||||||
11800 | |||||||
11801 | // Expressions default to 'id' when we're in a debugger. | ||||||
11802 | bool DefaultedAnyToId = false; | ||||||
11803 | if (getLangOpts().DebuggerCastResultToId && | ||||||
11804 | Init->getType() == Context.UnknownAnyTy && !IsInitCapture) { | ||||||
11805 | ExprResult Result = forceUnknownAnyToType(Init, Context.getObjCIdType()); | ||||||
11806 | if (Result.isInvalid()) { | ||||||
11807 | return QualType(); | ||||||
11808 | } | ||||||
11809 | Init = Result.get(); | ||||||
11810 | DefaultedAnyToId = true; | ||||||
11811 | } | ||||||
11812 | |||||||
11813 | // C++ [dcl.decomp]p1: | ||||||
11814 | // If the assignment-expression [...] has array type A and no ref-qualifier | ||||||
11815 | // is present, e has type cv A | ||||||
11816 | if (VDecl && isa<DecompositionDecl>(VDecl) && | ||||||
11817 | Context.hasSameUnqualifiedType(Type, Context.getAutoDeductType()) && | ||||||
11818 | DeduceInit->getType()->isConstantArrayType()) | ||||||
11819 | return Context.getQualifiedType(DeduceInit->getType(), | ||||||
11820 | Type.getQualifiers()); | ||||||
11821 | |||||||
11822 | QualType DeducedType; | ||||||
11823 | if (DeduceAutoType(TSI, DeduceInit, DeducedType) == DAR_Failed) { | ||||||
11824 | if (!IsInitCapture) | ||||||
11825 | DiagnoseAutoDeductionFailure(VDecl, DeduceInit); | ||||||
11826 | else if (isa<InitListExpr>(Init)) | ||||||
11827 | Diag(Range.getBegin(), | ||||||
11828 | diag::err_init_capture_deduction_failure_from_init_list) | ||||||
11829 | << VN | ||||||
11830 | << (DeduceInit->getType().isNull() ? TSI->getType() | ||||||
11831 | : DeduceInit->getType()) | ||||||
11832 | << DeduceInit->getSourceRange(); | ||||||
11833 | else | ||||||
11834 | Diag(Range.getBegin(), diag::err_init_capture_deduction_failure) | ||||||
11835 | << VN << TSI->getType() | ||||||
11836 | << (DeduceInit->getType().isNull() ? TSI->getType() | ||||||
11837 | : DeduceInit->getType()) | ||||||
11838 | << DeduceInit->getSourceRange(); | ||||||
11839 | } | ||||||
11840 | |||||||
11841 | // Warn if we deduced 'id'. 'auto' usually implies type-safety, but using | ||||||
11842 | // 'id' instead of a specific object type prevents most of our usual | ||||||
11843 | // checks. | ||||||
11844 | // We only want to warn outside of template instantiations, though: | ||||||
11845 | // inside a template, the 'id' could have come from a parameter. | ||||||
11846 | if (!inTemplateInstantiation() && !DefaultedAnyToId && !IsInitCapture && | ||||||
11847 | !DeducedType.isNull() && DeducedType->isObjCIdType()) { | ||||||
11848 | SourceLocation Loc = TSI->getTypeLoc().getBeginLoc(); | ||||||
11849 | Diag(Loc, diag::warn_auto_var_is_id) << VN << Range; | ||||||
11850 | } | ||||||
11851 | |||||||
11852 | return DeducedType; | ||||||
11853 | } | ||||||
11854 | |||||||
11855 | bool Sema::DeduceVariableDeclarationType(VarDecl *VDecl, bool DirectInit, | ||||||
11856 | Expr *Init) { | ||||||
11857 | assert(!Init || !Init->containsErrors())(static_cast <bool> (!Init || !Init->containsErrors( )) ? void (0) : __assert_fail ("!Init || !Init->containsErrors()" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11857, __extension__ __PRETTY_FUNCTION__)); | ||||||
11858 | QualType DeducedType = deduceVarTypeFromInitializer( | ||||||
11859 | VDecl, VDecl->getDeclName(), VDecl->getType(), VDecl->getTypeSourceInfo(), | ||||||
11860 | VDecl->getSourceRange(), DirectInit, Init); | ||||||
11861 | if (DeducedType.isNull()) { | ||||||
11862 | VDecl->setInvalidDecl(); | ||||||
11863 | return true; | ||||||
11864 | } | ||||||
11865 | |||||||
11866 | VDecl->setType(DeducedType); | ||||||
11867 | assert(VDecl->isLinkageValid())(static_cast <bool> (VDecl->isLinkageValid()) ? void (0) : __assert_fail ("VDecl->isLinkageValid()", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11867, __extension__ __PRETTY_FUNCTION__)); | ||||||
11868 | |||||||
11869 | // In ARC, infer lifetime. | ||||||
11870 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(VDecl)) | ||||||
11871 | VDecl->setInvalidDecl(); | ||||||
11872 | |||||||
11873 | if (getLangOpts().OpenCL) | ||||||
11874 | deduceOpenCLAddressSpace(VDecl); | ||||||
11875 | |||||||
11876 | // If this is a redeclaration, check that the type we just deduced matches | ||||||
11877 | // the previously declared type. | ||||||
11878 | if (VarDecl *Old = VDecl->getPreviousDecl()) { | ||||||
11879 | // We never need to merge the type, because we cannot form an incomplete | ||||||
11880 | // array of auto, nor deduce such a type. | ||||||
11881 | MergeVarDeclTypes(VDecl, Old, /*MergeTypeWithPrevious*/ false); | ||||||
11882 | } | ||||||
11883 | |||||||
11884 | // Check the deduced type is valid for a variable declaration. | ||||||
11885 | CheckVariableDeclarationType(VDecl); | ||||||
11886 | return VDecl->isInvalidDecl(); | ||||||
11887 | } | ||||||
11888 | |||||||
11889 | void Sema::checkNonTrivialCUnionInInitializer(const Expr *Init, | ||||||
11890 | SourceLocation Loc) { | ||||||
11891 | if (auto *EWC = dyn_cast<ExprWithCleanups>(Init)) | ||||||
11892 | Init = EWC->getSubExpr(); | ||||||
11893 | |||||||
11894 | if (auto *CE = dyn_cast<ConstantExpr>(Init)) | ||||||
11895 | Init = CE->getSubExpr(); | ||||||
11896 | |||||||
11897 | QualType InitType = Init->getType(); | ||||||
11898 | assert((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() ||(static_cast <bool> ((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && "shouldn't be called if type doesn't have a non-trivial C struct" ) ? void (0) : __assert_fail ("(InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C struct\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11900, __extension__ __PRETTY_FUNCTION__)) | ||||||
11899 | InitType.hasNonTrivialToPrimitiveCopyCUnion()) &&(static_cast <bool> ((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && "shouldn't be called if type doesn't have a non-trivial C struct" ) ? void (0) : __assert_fail ("(InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C struct\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11900, __extension__ __PRETTY_FUNCTION__)) | ||||||
11900 | "shouldn't be called if type doesn't have a non-trivial C struct")(static_cast <bool> ((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && "shouldn't be called if type doesn't have a non-trivial C struct" ) ? void (0) : __assert_fail ("(InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C struct\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 11900, __extension__ __PRETTY_FUNCTION__)); | ||||||
11901 | if (auto *ILE = dyn_cast<InitListExpr>(Init)) { | ||||||
11902 | for (auto I : ILE->inits()) { | ||||||
11903 | if (!I->getType().hasNonTrivialToPrimitiveDefaultInitializeCUnion() && | ||||||
11904 | !I->getType().hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
11905 | continue; | ||||||
11906 | SourceLocation SL = I->getExprLoc(); | ||||||
11907 | checkNonTrivialCUnionInInitializer(I, SL.isValid() ? SL : Loc); | ||||||
11908 | } | ||||||
11909 | return; | ||||||
11910 | } | ||||||
11911 | |||||||
11912 | if (isa<ImplicitValueInitExpr>(Init)) { | ||||||
11913 | if (InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion()) | ||||||
11914 | checkNonTrivialCUnion(InitType, Loc, NTCUC_DefaultInitializedObject, | ||||||
11915 | NTCUK_Init); | ||||||
11916 | } else { | ||||||
11917 | // Assume all other explicit initializers involving copying some existing | ||||||
11918 | // object. | ||||||
11919 | // TODO: ignore any explicit initializers where we can guarantee | ||||||
11920 | // copy-elision. | ||||||
11921 | if (InitType.hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
11922 | checkNonTrivialCUnion(InitType, Loc, NTCUC_CopyInit, NTCUK_Copy); | ||||||
11923 | } | ||||||
11924 | } | ||||||
11925 | |||||||
11926 | namespace { | ||||||
11927 | |||||||
11928 | bool shouldIgnoreForRecordTriviality(const FieldDecl *FD) { | ||||||
11929 | // Ignore unavailable fields. A field can be marked as unavailable explicitly | ||||||
11930 | // in the source code or implicitly by the compiler if it is in a union | ||||||
11931 | // defined in a system header and has non-trivial ObjC ownership | ||||||
11932 | // qualifications. We don't want those fields to participate in determining | ||||||
11933 | // whether the containing union is non-trivial. | ||||||
11934 | return FD->hasAttr<UnavailableAttr>(); | ||||||
11935 | } | ||||||
11936 | |||||||
11937 | struct DiagNonTrivalCUnionDefaultInitializeVisitor | ||||||
11938 | : DefaultInitializedTypeVisitor<DiagNonTrivalCUnionDefaultInitializeVisitor, | ||||||
11939 | void> { | ||||||
11940 | using Super = | ||||||
11941 | DefaultInitializedTypeVisitor<DiagNonTrivalCUnionDefaultInitializeVisitor, | ||||||
11942 | void>; | ||||||
11943 | |||||||
11944 | DiagNonTrivalCUnionDefaultInitializeVisitor( | ||||||
11945 | QualType OrigTy, SourceLocation OrigLoc, | ||||||
11946 | Sema::NonTrivialCUnionContext UseContext, Sema &S) | ||||||
11947 | : OrigTy(OrigTy), OrigLoc(OrigLoc), UseContext(UseContext), S(S) {} | ||||||
11948 | |||||||
11949 | void visitWithKind(QualType::PrimitiveDefaultInitializeKind PDIK, QualType QT, | ||||||
11950 | const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11951 | if (const auto *AT = S.Context.getAsArrayType(QT)) | ||||||
11952 | return this->asDerived().visit(S.Context.getBaseElementType(AT), FD, | ||||||
11953 | InNonTrivialUnion); | ||||||
11954 | return Super::visitWithKind(PDIK, QT, FD, InNonTrivialUnion); | ||||||
11955 | } | ||||||
11956 | |||||||
11957 | void visitARCStrong(QualType QT, const FieldDecl *FD, | ||||||
11958 | bool InNonTrivialUnion) { | ||||||
11959 | if (InNonTrivialUnion) | ||||||
11960 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11961 | << 1 << 0 << QT << FD->getName(); | ||||||
11962 | } | ||||||
11963 | |||||||
11964 | void visitARCWeak(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11965 | if (InNonTrivialUnion) | ||||||
11966 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11967 | << 1 << 0 << QT << FD->getName(); | ||||||
11968 | } | ||||||
11969 | |||||||
11970 | void visitStruct(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11971 | const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); | ||||||
11972 | if (RD->isUnion()) { | ||||||
11973 | if (OrigLoc.isValid()) { | ||||||
11974 | bool IsUnion = false; | ||||||
11975 | if (auto *OrigRD = OrigTy->getAsRecordDecl()) | ||||||
11976 | IsUnion = OrigRD->isUnion(); | ||||||
11977 | S.Diag(OrigLoc, diag::err_non_trivial_c_union_in_invalid_context) | ||||||
11978 | << 0 << OrigTy << IsUnion << UseContext; | ||||||
11979 | // Reset OrigLoc so that this diagnostic is emitted only once. | ||||||
11980 | OrigLoc = SourceLocation(); | ||||||
11981 | } | ||||||
11982 | InNonTrivialUnion = true; | ||||||
11983 | } | ||||||
11984 | |||||||
11985 | if (InNonTrivialUnion) | ||||||
11986 | S.Diag(RD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11987 | << 0 << 0 << QT.getUnqualifiedType() << ""; | ||||||
11988 | |||||||
11989 | for (const FieldDecl *FD : RD->fields()) | ||||||
11990 | if (!shouldIgnoreForRecordTriviality(FD)) | ||||||
11991 | asDerived().visit(FD->getType(), FD, InNonTrivialUnion); | ||||||
11992 | } | ||||||
11993 | |||||||
11994 | void visitTrivial(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
11995 | |||||||
11996 | // The non-trivial C union type or the struct/union type that contains a | ||||||
11997 | // non-trivial C union. | ||||||
11998 | QualType OrigTy; | ||||||
11999 | SourceLocation OrigLoc; | ||||||
12000 | Sema::NonTrivialCUnionContext UseContext; | ||||||
12001 | Sema &S; | ||||||
12002 | }; | ||||||
12003 | |||||||
12004 | struct DiagNonTrivalCUnionDestructedTypeVisitor | ||||||
12005 | : DestructedTypeVisitor<DiagNonTrivalCUnionDestructedTypeVisitor, void> { | ||||||
12006 | using Super = | ||||||
12007 | DestructedTypeVisitor<DiagNonTrivalCUnionDestructedTypeVisitor, void>; | ||||||
12008 | |||||||
12009 | DiagNonTrivalCUnionDestructedTypeVisitor( | ||||||
12010 | QualType OrigTy, SourceLocation OrigLoc, | ||||||
12011 | Sema::NonTrivialCUnionContext UseContext, Sema &S) | ||||||
12012 | : OrigTy(OrigTy), OrigLoc(OrigLoc), UseContext(UseContext), S(S) {} | ||||||
12013 | |||||||
12014 | void visitWithKind(QualType::DestructionKind DK, QualType QT, | ||||||
12015 | const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12016 | if (const auto *AT = S.Context.getAsArrayType(QT)) | ||||||
12017 | return this->asDerived().visit(S.Context.getBaseElementType(AT), FD, | ||||||
12018 | InNonTrivialUnion); | ||||||
12019 | return Super::visitWithKind(DK, QT, FD, InNonTrivialUnion); | ||||||
12020 | } | ||||||
12021 | |||||||
12022 | void visitARCStrong(QualType QT, const FieldDecl *FD, | ||||||
12023 | bool InNonTrivialUnion) { | ||||||
12024 | if (InNonTrivialUnion) | ||||||
12025 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12026 | << 1 << 1 << QT << FD->getName(); | ||||||
12027 | } | ||||||
12028 | |||||||
12029 | void visitARCWeak(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12030 | if (InNonTrivialUnion) | ||||||
12031 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12032 | << 1 << 1 << QT << FD->getName(); | ||||||
12033 | } | ||||||
12034 | |||||||
12035 | void visitStruct(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12036 | const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); | ||||||
12037 | if (RD->isUnion()) { | ||||||
12038 | if (OrigLoc.isValid()) { | ||||||
12039 | bool IsUnion = false; | ||||||
12040 | if (auto *OrigRD = OrigTy->getAsRecordDecl()) | ||||||
12041 | IsUnion = OrigRD->isUnion(); | ||||||
12042 | S.Diag(OrigLoc, diag::err_non_trivial_c_union_in_invalid_context) | ||||||
12043 | << 1 << OrigTy << IsUnion << UseContext; | ||||||
12044 | // Reset OrigLoc so that this diagnostic is emitted only once. | ||||||
12045 | OrigLoc = SourceLocation(); | ||||||
12046 | } | ||||||
12047 | InNonTrivialUnion = true; | ||||||
12048 | } | ||||||
12049 | |||||||
12050 | if (InNonTrivialUnion) | ||||||
12051 | S.Diag(RD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12052 | << 0 << 1 << QT.getUnqualifiedType() << ""; | ||||||
12053 | |||||||
12054 | for (const FieldDecl *FD : RD->fields()) | ||||||
12055 | if (!shouldIgnoreForRecordTriviality(FD)) | ||||||
12056 | asDerived().visit(FD->getType(), FD, InNonTrivialUnion); | ||||||
12057 | } | ||||||
12058 | |||||||
12059 | void visitTrivial(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
12060 | void visitCXXDestructor(QualType QT, const FieldDecl *FD, | ||||||
12061 | bool InNonTrivialUnion) {} | ||||||
12062 | |||||||
12063 | // The non-trivial C union type or the struct/union type that contains a | ||||||
12064 | // non-trivial C union. | ||||||
12065 | QualType OrigTy; | ||||||
12066 | SourceLocation OrigLoc; | ||||||
12067 | Sema::NonTrivialCUnionContext UseContext; | ||||||
12068 | Sema &S; | ||||||
12069 | }; | ||||||
12070 | |||||||
12071 | struct DiagNonTrivalCUnionCopyVisitor | ||||||
12072 | : CopiedTypeVisitor<DiagNonTrivalCUnionCopyVisitor, false, void> { | ||||||
12073 | using Super = CopiedTypeVisitor<DiagNonTrivalCUnionCopyVisitor, false, void>; | ||||||
12074 | |||||||
12075 | DiagNonTrivalCUnionCopyVisitor(QualType OrigTy, SourceLocation OrigLoc, | ||||||
12076 | Sema::NonTrivialCUnionContext UseContext, | ||||||
12077 | Sema &S) | ||||||
12078 | : OrigTy(OrigTy), OrigLoc(OrigLoc), UseContext(UseContext), S(S) {} | ||||||
12079 | |||||||
12080 | void visitWithKind(QualType::PrimitiveCopyKind PCK, QualType QT, | ||||||
12081 | const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12082 | if (const auto *AT = S.Context.getAsArrayType(QT)) | ||||||
12083 | return this->asDerived().visit(S.Context.getBaseElementType(AT), FD, | ||||||
12084 | InNonTrivialUnion); | ||||||
12085 | return Super::visitWithKind(PCK, QT, FD, InNonTrivialUnion); | ||||||
12086 | } | ||||||
12087 | |||||||
12088 | void visitARCStrong(QualType QT, const FieldDecl *FD, | ||||||
12089 | bool InNonTrivialUnion) { | ||||||
12090 | if (InNonTrivialUnion) | ||||||
12091 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12092 | << 1 << 2 << QT << FD->getName(); | ||||||
12093 | } | ||||||
12094 | |||||||
12095 | void visitARCWeak(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12096 | if (InNonTrivialUnion) | ||||||
12097 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12098 | << 1 << 2 << QT << FD->getName(); | ||||||
12099 | } | ||||||
12100 | |||||||
12101 | void visitStruct(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12102 | const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); | ||||||
12103 | if (RD->isUnion()) { | ||||||
12104 | if (OrigLoc.isValid()) { | ||||||
12105 | bool IsUnion = false; | ||||||
12106 | if (auto *OrigRD = OrigTy->getAsRecordDecl()) | ||||||
12107 | IsUnion = OrigRD->isUnion(); | ||||||
12108 | S.Diag(OrigLoc, diag::err_non_trivial_c_union_in_invalid_context) | ||||||
12109 | << 2 << OrigTy << IsUnion << UseContext; | ||||||
12110 | // Reset OrigLoc so that this diagnostic is emitted only once. | ||||||
12111 | OrigLoc = SourceLocation(); | ||||||
12112 | } | ||||||
12113 | InNonTrivialUnion = true; | ||||||
12114 | } | ||||||
12115 | |||||||
12116 | if (InNonTrivialUnion) | ||||||
12117 | S.Diag(RD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12118 | << 0 << 2 << QT.getUnqualifiedType() << ""; | ||||||
12119 | |||||||
12120 | for (const FieldDecl *FD : RD->fields()) | ||||||
12121 | if (!shouldIgnoreForRecordTriviality(FD)) | ||||||
12122 | asDerived().visit(FD->getType(), FD, InNonTrivialUnion); | ||||||
12123 | } | ||||||
12124 | |||||||
12125 | void preVisit(QualType::PrimitiveCopyKind PCK, QualType QT, | ||||||
12126 | const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
12127 | void visitTrivial(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
12128 | void visitVolatileTrivial(QualType QT, const FieldDecl *FD, | ||||||
12129 | bool InNonTrivialUnion) {} | ||||||
12130 | |||||||
12131 | // The non-trivial C union type or the struct/union type that contains a | ||||||
12132 | // non-trivial C union. | ||||||
12133 | QualType OrigTy; | ||||||
12134 | SourceLocation OrigLoc; | ||||||
12135 | Sema::NonTrivialCUnionContext UseContext; | ||||||
12136 | Sema &S; | ||||||
12137 | }; | ||||||
12138 | |||||||
12139 | } // namespace | ||||||
12140 | |||||||
12141 | void Sema::checkNonTrivialCUnion(QualType QT, SourceLocation Loc, | ||||||
12142 | NonTrivialCUnionContext UseContext, | ||||||
12143 | unsigned NonTrivialKind) { | ||||||
12144 | assert((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() ||(static_cast <bool> ((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? void (0) : __assert_fail ("(QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C union\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 12147, __extension__ __PRETTY_FUNCTION__)) | ||||||
12145 | QT.hasNonTrivialToPrimitiveDestructCUnion() ||(static_cast <bool> ((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? void (0) : __assert_fail ("(QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C union\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 12147, __extension__ __PRETTY_FUNCTION__)) | ||||||
12146 | QT.hasNonTrivialToPrimitiveCopyCUnion()) &&(static_cast <bool> ((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? void (0) : __assert_fail ("(QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C union\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 12147, __extension__ __PRETTY_FUNCTION__)) | ||||||
12147 | "shouldn't be called if type doesn't have a non-trivial C union")(static_cast <bool> ((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? void (0) : __assert_fail ("(QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C union\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 12147, __extension__ __PRETTY_FUNCTION__)); | ||||||
12148 | |||||||
12149 | if ((NonTrivialKind & NTCUK_Init) && | ||||||
12150 | QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion()) | ||||||
12151 | DiagNonTrivalCUnionDefaultInitializeVisitor(QT, Loc, UseContext, *this) | ||||||
12152 | .visit(QT, nullptr, false); | ||||||
12153 | if ((NonTrivialKind & NTCUK_Destruct) && | ||||||
12154 | QT.hasNonTrivialToPrimitiveDestructCUnion()) | ||||||
12155 | DiagNonTrivalCUnionDestructedTypeVisitor(QT, Loc, UseContext, *this) | ||||||
12156 | .visit(QT, nullptr, false); | ||||||
12157 | if ((NonTrivialKind & NTCUK_Copy) && QT.hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
12158 | DiagNonTrivalCUnionCopyVisitor(QT, Loc, UseContext, *this) | ||||||
12159 | .visit(QT, nullptr, false); | ||||||
12160 | } | ||||||
12161 | |||||||
12162 | /// AddInitializerToDecl - Adds the initializer Init to the | ||||||
12163 | /// declaration dcl. If DirectInit is true, this is C++ direct | ||||||
12164 | /// initialization rather than copy initialization. | ||||||
12165 | void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init, bool DirectInit) { | ||||||
12166 | // If there is no declaration, there was an error parsing it. Just ignore | ||||||
12167 | // the initializer. | ||||||
12168 | if (!RealDecl || RealDecl->isInvalidDecl()) { | ||||||
12169 | CorrectDelayedTyposInExpr(Init, dyn_cast_or_null<VarDecl>(RealDecl)); | ||||||
12170 | return; | ||||||
12171 | } | ||||||
12172 | |||||||
12173 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(RealDecl)) { | ||||||
12174 | // Pure-specifiers are handled in ActOnPureSpecifier. | ||||||
12175 | Diag(Method->getLocation(), diag::err_member_function_initialization) | ||||||
12176 | << Method->getDeclName() << Init->getSourceRange(); | ||||||
12177 | Method->setInvalidDecl(); | ||||||
12178 | return; | ||||||
12179 | } | ||||||
12180 | |||||||
12181 | VarDecl *VDecl = dyn_cast<VarDecl>(RealDecl); | ||||||
12182 | if (!VDecl) { | ||||||
12183 | assert(!isa<FieldDecl>(RealDecl) && "field init shouldn't get here")(static_cast <bool> (!isa<FieldDecl>(RealDecl) && "field init shouldn't get here") ? void (0) : __assert_fail ( "!isa<FieldDecl>(RealDecl) && \"field init shouldn't get here\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 12183, __extension__ __PRETTY_FUNCTION__)); | ||||||
12184 | Diag(RealDecl->getLocation(), diag::err_illegal_initializer); | ||||||
12185 | RealDecl->setInvalidDecl(); | ||||||
12186 | return; | ||||||
12187 | } | ||||||
12188 | |||||||
12189 | // C++11 [decl.spec.auto]p6. Deduce the type which 'auto' stands in for. | ||||||
12190 | if (VDecl->getType()->isUndeducedType()) { | ||||||
12191 | // Attempt typo correction early so that the type of the init expression can | ||||||
12192 | // be deduced based on the chosen correction if the original init contains a | ||||||
12193 | // TypoExpr. | ||||||
12194 | ExprResult Res = CorrectDelayedTyposInExpr(Init, VDecl); | ||||||
12195 | if (!Res.isUsable()) { | ||||||
12196 | // There are unresolved typos in Init, just drop them. | ||||||
12197 | // FIXME: improve the recovery strategy to preserve the Init. | ||||||
12198 | RealDecl->setInvalidDecl(); | ||||||
12199 | return; | ||||||
12200 | } | ||||||
12201 | if (Res.get()->containsErrors()) { | ||||||
12202 | // Invalidate the decl as we don't know the type for recovery-expr yet. | ||||||
12203 | RealDecl->setInvalidDecl(); | ||||||
12204 | VDecl->setInit(Res.get()); | ||||||
12205 | return; | ||||||
12206 | } | ||||||
12207 | Init = Res.get(); | ||||||
12208 | |||||||
12209 | if (DeduceVariableDeclarationType(VDecl, DirectInit, Init)) | ||||||
12210 | return; | ||||||
12211 | } | ||||||
12212 | |||||||
12213 | // dllimport cannot be used on variable definitions. | ||||||
12214 | if (VDecl->hasAttr<DLLImportAttr>() && !VDecl->isStaticDataMember()) { | ||||||
12215 | Diag(VDecl->getLocation(), diag::err_attribute_dllimport_data_definition); | ||||||
12216 | VDecl->setInvalidDecl(); | ||||||
12217 | return; | ||||||
12218 | } | ||||||
12219 | |||||||
12220 | if (VDecl->isLocalVarDecl() && VDecl->hasExternalStorage()) { | ||||||
12221 | // C99 6.7.8p5. C++ has no such restriction, but that is a defect. | ||||||
12222 | Diag(VDecl->getLocation(), diag::err_block_extern_cant_init); | ||||||
12223 | VDecl->setInvalidDecl(); | ||||||
12224 | return; | ||||||
12225 | } | ||||||
12226 | |||||||
12227 | if (!VDecl->getType()->isDependentType()) { | ||||||
12228 | // A definition must end up with a complete type, which means it must be | ||||||
12229 | // complete with the restriction that an array type might be completed by | ||||||
12230 | // the initializer; note that later code assumes this restriction. | ||||||
12231 | QualType BaseDeclType = VDecl->getType(); | ||||||
12232 | if (const ArrayType *Array = Context.getAsIncompleteArrayType(BaseDeclType)) | ||||||
12233 | BaseDeclType = Array->getElementType(); | ||||||
12234 | if (RequireCompleteType(VDecl->getLocation(), BaseDeclType, | ||||||
12235 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12236 | RealDecl->setInvalidDecl(); | ||||||
12237 | return; | ||||||
12238 | } | ||||||
12239 | |||||||
12240 | // The variable can not have an abstract class type. | ||||||
12241 | if (RequireNonAbstractType(VDecl->getLocation(), VDecl->getType(), | ||||||
12242 | diag::err_abstract_type_in_decl, | ||||||
12243 | AbstractVariableType)) | ||||||
12244 | VDecl->setInvalidDecl(); | ||||||
12245 | } | ||||||
12246 | |||||||
12247 | // If adding the initializer will turn this declaration into a definition, | ||||||
12248 | // and we already have a definition for this variable, diagnose or otherwise | ||||||
12249 | // handle the situation. | ||||||
12250 | if (VarDecl *Def = VDecl->getDefinition()) | ||||||
12251 | if (Def != VDecl && | ||||||
12252 | (!VDecl->isStaticDataMember() || VDecl->isOutOfLine()) && | ||||||
12253 | !VDecl->isThisDeclarationADemotedDefinition() && | ||||||
12254 | checkVarDeclRedefinition(Def, VDecl)) | ||||||
12255 | return; | ||||||
12256 | |||||||
12257 | if (getLangOpts().CPlusPlus) { | ||||||
12258 | // C++ [class.static.data]p4 | ||||||
12259 | // If a static data member is of const integral or const | ||||||
12260 | // enumeration type, its declaration in the class definition can | ||||||
12261 | // specify a constant-initializer which shall be an integral | ||||||
12262 | // constant expression (5.19). In that case, the member can appear | ||||||
12263 | // in integral constant expressions. The member shall still be | ||||||
12264 | // defined in a namespace scope if it is used in the program and the | ||||||
12265 | // namespace scope definition shall not contain an initializer. | ||||||
12266 | // | ||||||
12267 | // We already performed a redefinition check above, but for static | ||||||
12268 | // data members we also need to check whether there was an in-class | ||||||
12269 | // declaration with an initializer. | ||||||
12270 | if (VDecl->isStaticDataMember() && VDecl->getCanonicalDecl()->hasInit()) { | ||||||
12271 | Diag(Init->getExprLoc(), diag::err_static_data_member_reinitialization) | ||||||
12272 | << VDecl->getDeclName(); | ||||||
12273 | Diag(VDecl->getCanonicalDecl()->getInit()->getExprLoc(), | ||||||
12274 | diag::note_previous_initializer) | ||||||
12275 | << 0; | ||||||
12276 | return; | ||||||
12277 | } | ||||||
12278 | |||||||
12279 | if (VDecl->hasLocalStorage()) | ||||||
12280 | setFunctionHasBranchProtectedScope(); | ||||||
12281 | |||||||
12282 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) { | ||||||
12283 | VDecl->setInvalidDecl(); | ||||||
12284 | return; | ||||||
12285 | } | ||||||
12286 | } | ||||||
12287 | |||||||
12288 | // OpenCL 1.1 6.5.2: "Variables allocated in the __local address space inside | ||||||
12289 | // a kernel function cannot be initialized." | ||||||
12290 | if (VDecl->getType().getAddressSpace() == LangAS::opencl_local) { | ||||||
12291 | Diag(VDecl->getLocation(), diag::err_local_cant_init); | ||||||
12292 | VDecl->setInvalidDecl(); | ||||||
12293 | return; | ||||||
12294 | } | ||||||
12295 | |||||||
12296 | // The LoaderUninitialized attribute acts as a definition (of undef). | ||||||
12297 | if (VDecl->hasAttr<LoaderUninitializedAttr>()) { | ||||||
12298 | Diag(VDecl->getLocation(), diag::err_loader_uninitialized_cant_init); | ||||||
12299 | VDecl->setInvalidDecl(); | ||||||
12300 | return; | ||||||
12301 | } | ||||||
12302 | |||||||
12303 | // Get the decls type and save a reference for later, since | ||||||
12304 | // CheckInitializerTypes may change it. | ||||||
12305 | QualType DclT = VDecl->getType(), SavT = DclT; | ||||||
12306 | |||||||
12307 | // Expressions default to 'id' when we're in a debugger | ||||||
12308 | // and we are assigning it to a variable of Objective-C pointer type. | ||||||
12309 | if (getLangOpts().DebuggerCastResultToId && DclT->isObjCObjectPointerType() && | ||||||
12310 | Init->getType() == Context.UnknownAnyTy) { | ||||||
12311 | ExprResult Result = forceUnknownAnyToType(Init, Context.getObjCIdType()); | ||||||
12312 | if (Result.isInvalid()) { | ||||||
12313 | VDecl->setInvalidDecl(); | ||||||
12314 | return; | ||||||
12315 | } | ||||||
12316 | Init = Result.get(); | ||||||
12317 | } | ||||||
12318 | |||||||
12319 | // Perform the initialization. | ||||||
12320 | ParenListExpr *CXXDirectInit = dyn_cast<ParenListExpr>(Init); | ||||||
12321 | if (!VDecl->isInvalidDecl()) { | ||||||
12322 | InitializedEntity Entity = InitializedEntity::InitializeVariable(VDecl); | ||||||
12323 | InitializationKind Kind = InitializationKind::CreateForInit( | ||||||
12324 | VDecl->getLocation(), DirectInit, Init); | ||||||
12325 | |||||||
12326 | MultiExprArg Args = Init; | ||||||
12327 | if (CXXDirectInit) | ||||||
12328 | Args = MultiExprArg(CXXDirectInit->getExprs(), | ||||||
12329 | CXXDirectInit->getNumExprs()); | ||||||
12330 | |||||||
12331 | // Try to correct any TypoExprs in the initialization arguments. | ||||||
12332 | for (size_t Idx = 0; Idx < Args.size(); ++Idx) { | ||||||
12333 | ExprResult Res = CorrectDelayedTyposInExpr( | ||||||
12334 | Args[Idx], VDecl, /*RecoverUncorrectedTypos=*/true, | ||||||
12335 | [this, Entity, Kind](Expr *E) { | ||||||
12336 | InitializationSequence Init(*this, Entity, Kind, MultiExprArg(E)); | ||||||
12337 | return Init.Failed() ? ExprError() : E; | ||||||
12338 | }); | ||||||
12339 | if (Res.isInvalid()) { | ||||||
12340 | VDecl->setInvalidDecl(); | ||||||
12341 | } else if (Res.get() != Args[Idx]) { | ||||||
12342 | Args[Idx] = Res.get(); | ||||||
12343 | } | ||||||
12344 | } | ||||||
12345 | if (VDecl->isInvalidDecl()) | ||||||
12346 | return; | ||||||
12347 | |||||||
12348 | InitializationSequence InitSeq(*this, Entity, Kind, Args, | ||||||
12349 | /*TopLevelOfInitList=*/false, | ||||||
12350 | /*TreatUnavailableAsInvalid=*/false); | ||||||
12351 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, Args, &DclT); | ||||||
12352 | if (Result.isInvalid()) { | ||||||
12353 | // If the provied initializer fails to initialize the var decl, | ||||||
12354 | // we attach a recovery expr for better recovery. | ||||||
12355 | auto RecoveryExpr = | ||||||
12356 | CreateRecoveryExpr(Init->getBeginLoc(), Init->getEndLoc(), Args); | ||||||
12357 | if (RecoveryExpr.get()) | ||||||
12358 | VDecl->setInit(RecoveryExpr.get()); | ||||||
12359 | return; | ||||||
12360 | } | ||||||
12361 | |||||||
12362 | Init = Result.getAs<Expr>(); | ||||||
12363 | } | ||||||
12364 | |||||||
12365 | // Check for self-references within variable initializers. | ||||||
12366 | // Variables declared within a function/method body (except for references) | ||||||
12367 | // are handled by a dataflow analysis. | ||||||
12368 | // This is undefined behavior in C++, but valid in C. | ||||||
12369 | if (getLangOpts().CPlusPlus) | ||||||
12370 | if (!VDecl->hasLocalStorage() || VDecl->getType()->isRecordType() || | ||||||
12371 | VDecl->getType()->isReferenceType()) | ||||||
12372 | CheckSelfReference(*this, RealDecl, Init, DirectInit); | ||||||
12373 | |||||||
12374 | // If the type changed, it means we had an incomplete type that was | ||||||
12375 | // completed by the initializer. For example: | ||||||
12376 | // int ary[] = { 1, 3, 5 }; | ||||||
12377 | // "ary" transitions from an IncompleteArrayType to a ConstantArrayType. | ||||||
12378 | if (!VDecl->isInvalidDecl() && (DclT != SavT)) | ||||||
12379 | VDecl->setType(DclT); | ||||||
12380 | |||||||
12381 | if (!VDecl->isInvalidDecl()) { | ||||||
12382 | checkUnsafeAssigns(VDecl->getLocation(), VDecl->getType(), Init); | ||||||
12383 | |||||||
12384 | if (VDecl->hasAttr<BlocksAttr>()) | ||||||
12385 | checkRetainCycles(VDecl, Init); | ||||||
12386 | |||||||
12387 | // It is safe to assign a weak reference into a strong variable. | ||||||
12388 | // Although this code can still have problems: | ||||||
12389 | // id x = self.weakProp; | ||||||
12390 | // id y = self.weakProp; | ||||||
12391 | // we do not warn to warn spuriously when 'x' and 'y' are on separate | ||||||
12392 | // paths through the function. This should be revisited if | ||||||
12393 | // -Wrepeated-use-of-weak is made flow-sensitive. | ||||||
12394 | if (FunctionScopeInfo *FSI = getCurFunction()) | ||||||
12395 | if ((VDecl->getType().getObjCLifetime() == Qualifiers::OCL_Strong || | ||||||
12396 | VDecl->getType().isNonWeakInMRRWithObjCWeak(Context)) && | ||||||
12397 | !Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, | ||||||
12398 | Init->getBeginLoc())) | ||||||
12399 | FSI->markSafeWeakUse(Init); | ||||||
12400 | } | ||||||
12401 | |||||||
12402 | // The initialization is usually a full-expression. | ||||||
12403 | // | ||||||
12404 | // FIXME: If this is a braced initialization of an aggregate, it is not | ||||||
12405 | // an expression, and each individual field initializer is a separate | ||||||
12406 | // full-expression. For instance, in: | ||||||
12407 | // | ||||||
12408 | // struct Temp { ~Temp(); }; | ||||||
12409 | // struct S { S(Temp); }; | ||||||
12410 | // struct T { S a, b; } t = { Temp(), Temp() } | ||||||
12411 | // | ||||||
12412 | // we should destroy the first Temp before constructing the second. | ||||||
12413 | ExprResult Result = | ||||||
12414 | ActOnFinishFullExpr(Init, VDecl->getLocation(), | ||||||
12415 | /*DiscardedValue*/ false, VDecl->isConstexpr()); | ||||||
12416 | if (Result.isInvalid()) { | ||||||
12417 | VDecl->setInvalidDecl(); | ||||||
12418 | return; | ||||||
12419 | } | ||||||
12420 | Init = Result.get(); | ||||||
12421 | |||||||
12422 | // Attach the initializer to the decl. | ||||||
12423 | VDecl->setInit(Init); | ||||||
12424 | |||||||
12425 | if (VDecl->isLocalVarDecl()) { | ||||||
12426 | // Don't check the initializer if the declaration is malformed. | ||||||
12427 | if (VDecl->isInvalidDecl()) { | ||||||
12428 | // do nothing | ||||||
12429 | |||||||
12430 | // OpenCL v1.2 s6.5.3: __constant locals must be constant-initialized. | ||||||
12431 | // This is true even in C++ for OpenCL. | ||||||
12432 | } else if (VDecl->getType().getAddressSpace() == LangAS::opencl_constant) { | ||||||
12433 | CheckForConstantInitializer(Init, DclT); | ||||||
12434 | |||||||
12435 | // Otherwise, C++ does not restrict the initializer. | ||||||
12436 | } else if (getLangOpts().CPlusPlus) { | ||||||
12437 | // do nothing | ||||||
12438 | |||||||
12439 | // C99 6.7.8p4: All the expressions in an initializer for an object that has | ||||||
12440 | // static storage duration shall be constant expressions or string literals. | ||||||
12441 | } else if (VDecl->getStorageClass() == SC_Static) { | ||||||
12442 | CheckForConstantInitializer(Init, DclT); | ||||||
12443 | |||||||
12444 | // C89 is stricter than C99 for aggregate initializers. | ||||||
12445 | // C89 6.5.7p3: All the expressions [...] in an initializer list | ||||||
12446 | // for an object that has aggregate or union type shall be | ||||||
12447 | // constant expressions. | ||||||
12448 | } else if (!getLangOpts().C99 && VDecl->getType()->isAggregateType() && | ||||||
12449 | isa<InitListExpr>(Init)) { | ||||||
12450 | const Expr *Culprit; | ||||||
12451 | if (!Init->isConstantInitializer(Context, false, &Culprit)) { | ||||||
12452 | Diag(Culprit->getExprLoc(), | ||||||
12453 | diag::ext_aggregate_init_not_constant) | ||||||
12454 | << Culprit->getSourceRange(); | ||||||
12455 | } | ||||||
12456 | } | ||||||
12457 | |||||||
12458 | if (auto *E = dyn_cast<ExprWithCleanups>(Init)) | ||||||
12459 | if (auto *BE = dyn_cast<BlockExpr>(E->getSubExpr()->IgnoreParens())) | ||||||
12460 | if (VDecl->hasLocalStorage()) | ||||||
12461 | BE->getBlockDecl()->setCanAvoidCopyToHeap(); | ||||||
12462 | } else if (VDecl->isStaticDataMember() && !VDecl->isInline() && | ||||||
12463 | VDecl->getLexicalDeclContext()->isRecord()) { | ||||||
12464 | // This is an in-class initialization for a static data member, e.g., | ||||||
12465 | // | ||||||
12466 | // struct S { | ||||||
12467 | // static const int value = 17; | ||||||
12468 | // }; | ||||||
12469 | |||||||
12470 | // C++ [class.mem]p4: | ||||||
12471 | // A member-declarator can contain a constant-initializer only | ||||||
12472 | // if it declares a static member (9.4) of const integral or | ||||||
12473 | // const enumeration type, see 9.4.2. | ||||||
12474 | // | ||||||
12475 | // C++11 [class.static.data]p3: | ||||||
12476 | // If a non-volatile non-inline const static data member is of integral | ||||||
12477 | // or enumeration type, its declaration in the class definition can | ||||||
12478 | // specify a brace-or-equal-initializer in which every initializer-clause | ||||||
12479 | // that is an assignment-expression is a constant expression. A static | ||||||
12480 | // data member of literal type can be declared in the class definition | ||||||
12481 | // with the constexpr specifier; if so, its declaration shall specify a | ||||||
12482 | // brace-or-equal-initializer in which every initializer-clause that is | ||||||
12483 | // an assignment-expression is a constant expression. | ||||||
12484 | |||||||
12485 | // Do nothing on dependent types. | ||||||
12486 | if (DclT->isDependentType()) { | ||||||
12487 | |||||||
12488 | // Allow any 'static constexpr' members, whether or not they are of literal | ||||||
12489 | // type. We separately check that every constexpr variable is of literal | ||||||
12490 | // type. | ||||||
12491 | } else if (VDecl->isConstexpr()) { | ||||||
12492 | |||||||
12493 | // Require constness. | ||||||
12494 | } else if (!DclT.isConstQualified()) { | ||||||
12495 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_non_const) | ||||||
12496 | << Init->getSourceRange(); | ||||||
12497 | VDecl->setInvalidDecl(); | ||||||
12498 | |||||||
12499 | // We allow integer constant expressions in all cases. | ||||||
12500 | } else if (DclT->isIntegralOrEnumerationType()) { | ||||||
12501 | // Check whether the expression is a constant expression. | ||||||
12502 | SourceLocation Loc; | ||||||
12503 | if (getLangOpts().CPlusPlus11 && DclT.isVolatileQualified()) | ||||||
12504 | // In C++11, a non-constexpr const static data member with an | ||||||
12505 | // in-class initializer cannot be volatile. | ||||||
12506 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_volatile); | ||||||
12507 | else if (Init->isValueDependent()) | ||||||
12508 | ; // Nothing to check. | ||||||
12509 | else if (Init->isIntegerConstantExpr(Context, &Loc)) | ||||||
12510 | ; // Ok, it's an ICE! | ||||||
12511 | else if (Init->getType()->isScopedEnumeralType() && | ||||||
12512 | Init->isCXX11ConstantExpr(Context)) | ||||||
12513 | ; // Ok, it is a scoped-enum constant expression. | ||||||
12514 | else if (Init->isEvaluatable(Context)) { | ||||||
12515 | // If we can constant fold the initializer through heroics, accept it, | ||||||
12516 | // but report this as a use of an extension for -pedantic. | ||||||
12517 | Diag(Loc, diag::ext_in_class_initializer_non_constant) | ||||||
12518 | << Init->getSourceRange(); | ||||||
12519 | } else { | ||||||
12520 | // Otherwise, this is some crazy unknown case. Report the issue at the | ||||||
12521 | // location provided by the isIntegerConstantExpr failed check. | ||||||
12522 | Diag(Loc, diag::err_in_class_initializer_non_constant) | ||||||
12523 | << Init->getSourceRange(); | ||||||
12524 | VDecl->setInvalidDecl(); | ||||||
12525 | } | ||||||
12526 | |||||||
12527 | // We allow foldable floating-point constants as an extension. | ||||||
12528 | } else if (DclT->isFloatingType()) { // also permits complex, which is ok | ||||||
12529 | // In C++98, this is a GNU extension. In C++11, it is not, but we support | ||||||
12530 | // it anyway and provide a fixit to add the 'constexpr'. | ||||||
12531 | if (getLangOpts().CPlusPlus11) { | ||||||
12532 | Diag(VDecl->getLocation(), | ||||||
12533 | diag::ext_in_class_initializer_float_type_cxx11) | ||||||
12534 | << DclT << Init->getSourceRange(); | ||||||
12535 | Diag(VDecl->getBeginLoc(), | ||||||
12536 | diag::note_in_class_initializer_float_type_cxx11) | ||||||
12537 | << FixItHint::CreateInsertion(VDecl->getBeginLoc(), "constexpr "); | ||||||
12538 | } else { | ||||||
12539 | Diag(VDecl->getLocation(), diag::ext_in_class_initializer_float_type) | ||||||
12540 | << DclT << Init->getSourceRange(); | ||||||
12541 | |||||||
12542 | if (!Init->isValueDependent() && !Init->isEvaluatable(Context)) { | ||||||
12543 | Diag(Init->getExprLoc(), diag::err_in_class_initializer_non_constant) | ||||||
12544 | << Init->getSourceRange(); | ||||||
12545 | VDecl->setInvalidDecl(); | ||||||
12546 | } | ||||||
12547 | } | ||||||
12548 | |||||||
12549 | // Suggest adding 'constexpr' in C++11 for literal types. | ||||||
12550 | } else if (getLangOpts().CPlusPlus11 && DclT->isLiteralType(Context)) { | ||||||
12551 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_literal_type) | ||||||
12552 | << DclT << Init->getSourceRange() | ||||||
12553 | << FixItHint::CreateInsertion(VDecl->getBeginLoc(), "constexpr "); | ||||||
12554 | VDecl->setConstexpr(true); | ||||||
12555 | |||||||
12556 | } else { | ||||||
12557 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_bad_type) | ||||||
12558 | << DclT << Init->getSourceRange(); | ||||||
12559 | VDecl->setInvalidDecl(); | ||||||
12560 | } | ||||||
12561 | } else if (VDecl->isFileVarDecl()) { | ||||||
12562 | // In C, extern is typically used to avoid tentative definitions when | ||||||
12563 | // declaring variables in headers, but adding an intializer makes it a | ||||||
12564 | // definition. This is somewhat confusing, so GCC and Clang both warn on it. | ||||||
12565 | // In C++, extern is often used to give implictly static const variables | ||||||
12566 | // external linkage, so don't warn in that case. If selectany is present, | ||||||
12567 | // this might be header code intended for C and C++ inclusion, so apply the | ||||||
12568 | // C++ rules. | ||||||
12569 | if (VDecl->getStorageClass() == SC_Extern && | ||||||
12570 | ((!getLangOpts().CPlusPlus && !VDecl->hasAttr<SelectAnyAttr>()) || | ||||||
12571 | !Context.getBaseElementType(VDecl->getType()).isConstQualified()) && | ||||||
12572 | !(getLangOpts().CPlusPlus && VDecl->isExternC()) && | ||||||
12573 | !isTemplateInstantiation(VDecl->getTemplateSpecializationKind())) | ||||||
12574 | Diag(VDecl->getLocation(), diag::warn_extern_init); | ||||||
12575 | |||||||
12576 | // In Microsoft C++ mode, a const variable defined in namespace scope has | ||||||
12577 | // external linkage by default if the variable is declared with | ||||||
12578 | // __declspec(dllexport). | ||||||
12579 | if (Context.getTargetInfo().getCXXABI().isMicrosoft() && | ||||||
12580 | getLangOpts().CPlusPlus && VDecl->getType().isConstQualified() && | ||||||
12581 | VDecl->hasAttr<DLLExportAttr>() && VDecl->getDefinition()) | ||||||
12582 | VDecl->setStorageClass(SC_Extern); | ||||||
12583 | |||||||
12584 | // C99 6.7.8p4. All file scoped initializers need to be constant. | ||||||
12585 | if (!getLangOpts().CPlusPlus && !VDecl->isInvalidDecl()) | ||||||
12586 | CheckForConstantInitializer(Init, DclT); | ||||||
12587 | } | ||||||
12588 | |||||||
12589 | QualType InitType = Init->getType(); | ||||||
12590 | if (!InitType.isNull() && | ||||||
12591 | (InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || | ||||||
12592 | InitType.hasNonTrivialToPrimitiveCopyCUnion())) | ||||||
12593 | checkNonTrivialCUnionInInitializer(Init, Init->getExprLoc()); | ||||||
12594 | |||||||
12595 | // We will represent direct-initialization similarly to copy-initialization: | ||||||
12596 | // int x(1); -as-> int x = 1; | ||||||
12597 | // ClassType x(a,b,c); -as-> ClassType x = ClassType(a,b,c); | ||||||
12598 | // | ||||||
12599 | // Clients that want to distinguish between the two forms, can check for | ||||||
12600 | // direct initializer using VarDecl::getInitStyle(). | ||||||
12601 | // A major benefit is that clients that don't particularly care about which | ||||||
12602 | // exactly form was it (like the CodeGen) can handle both cases without | ||||||
12603 | // special case code. | ||||||
12604 | |||||||
12605 | // C++ 8.5p11: | ||||||
12606 | // The form of initialization (using parentheses or '=') is generally | ||||||
12607 | // insignificant, but does matter when the entity being initialized has a | ||||||
12608 | // class type. | ||||||
12609 | if (CXXDirectInit) { | ||||||
12610 | assert(DirectInit && "Call-style initializer must be direct init.")(static_cast <bool> (DirectInit && "Call-style initializer must be direct init." ) ? void (0) : __assert_fail ("DirectInit && \"Call-style initializer must be direct init.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 12610, __extension__ __PRETTY_FUNCTION__)); | ||||||
12611 | VDecl->setInitStyle(VarDecl::CallInit); | ||||||
12612 | } else if (DirectInit) { | ||||||
12613 | // This must be list-initialization. No other way is direct-initialization. | ||||||
12614 | VDecl->setInitStyle(VarDecl::ListInit); | ||||||
12615 | } | ||||||
12616 | |||||||
12617 | if (LangOpts.OpenMP && | ||||||
12618 | (LangOpts.OpenMPIsDevice || !LangOpts.OMPTargetTriples.empty()) && | ||||||
12619 | VDecl->isFileVarDecl()) | ||||||
12620 | DeclsToCheckForDeferredDiags.insert(VDecl); | ||||||
12621 | CheckCompleteVariableDeclaration(VDecl); | ||||||
12622 | } | ||||||
12623 | |||||||
12624 | /// ActOnInitializerError - Given that there was an error parsing an | ||||||
12625 | /// initializer for the given declaration, try to return to some form | ||||||
12626 | /// of sanity. | ||||||
12627 | void Sema::ActOnInitializerError(Decl *D) { | ||||||
12628 | // Our main concern here is re-establishing invariants like "a | ||||||
12629 | // variable's type is either dependent or complete". | ||||||
12630 | if (!D || D->isInvalidDecl()) return; | ||||||
12631 | |||||||
12632 | VarDecl *VD = dyn_cast<VarDecl>(D); | ||||||
12633 | if (!VD) return; | ||||||
12634 | |||||||
12635 | // Bindings are not usable if we can't make sense of the initializer. | ||||||
12636 | if (auto *DD = dyn_cast<DecompositionDecl>(D)) | ||||||
12637 | for (auto *BD : DD->bindings()) | ||||||
12638 | BD->setInvalidDecl(); | ||||||
12639 | |||||||
12640 | // Auto types are meaningless if we can't make sense of the initializer. | ||||||
12641 | if (VD->getType()->isUndeducedType()) { | ||||||
12642 | D->setInvalidDecl(); | ||||||
12643 | return; | ||||||
12644 | } | ||||||
12645 | |||||||
12646 | QualType Ty = VD->getType(); | ||||||
12647 | if (Ty->isDependentType()) return; | ||||||
12648 | |||||||
12649 | // Require a complete type. | ||||||
12650 | if (RequireCompleteType(VD->getLocation(), | ||||||
12651 | Context.getBaseElementType(Ty), | ||||||
12652 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12653 | VD->setInvalidDecl(); | ||||||
12654 | return; | ||||||
12655 | } | ||||||
12656 | |||||||
12657 | // Require a non-abstract type. | ||||||
12658 | if (RequireNonAbstractType(VD->getLocation(), Ty, | ||||||
12659 | diag::err_abstract_type_in_decl, | ||||||
12660 | AbstractVariableType)) { | ||||||
12661 | VD->setInvalidDecl(); | ||||||
12662 | return; | ||||||
12663 | } | ||||||
12664 | |||||||
12665 | // Don't bother complaining about constructors or destructors, | ||||||
12666 | // though. | ||||||
12667 | } | ||||||
12668 | |||||||
12669 | void Sema::ActOnUninitializedDecl(Decl *RealDecl) { | ||||||
12670 | // If there is no declaration, there was an error parsing it. Just ignore it. | ||||||
12671 | if (!RealDecl) | ||||||
12672 | return; | ||||||
12673 | |||||||
12674 | if (VarDecl *Var = dyn_cast<VarDecl>(RealDecl)) { | ||||||
12675 | QualType Type = Var->getType(); | ||||||
12676 | |||||||
12677 | // C++1z [dcl.dcl]p1 grammar implies that an initializer is mandatory. | ||||||
12678 | if (isa<DecompositionDecl>(RealDecl)) { | ||||||
12679 | Diag(Var->getLocation(), diag::err_decomp_decl_requires_init) << Var; | ||||||
12680 | Var->setInvalidDecl(); | ||||||
12681 | return; | ||||||
12682 | } | ||||||
12683 | |||||||
12684 | if (Type->isUndeducedType() && | ||||||
12685 | DeduceVariableDeclarationType(Var, false, nullptr)) | ||||||
12686 | return; | ||||||
12687 | |||||||
12688 | // C++11 [class.static.data]p3: A static data member can be declared with | ||||||
12689 | // the constexpr specifier; if so, its declaration shall specify | ||||||
12690 | // a brace-or-equal-initializer. | ||||||
12691 | // C++11 [dcl.constexpr]p1: The constexpr specifier shall be applied only to | ||||||
12692 | // the definition of a variable [...] or the declaration of a static data | ||||||
12693 | // member. | ||||||
12694 | if (Var->isConstexpr() && !Var->isThisDeclarationADefinition() && | ||||||
12695 | !Var->isThisDeclarationADemotedDefinition()) { | ||||||
12696 | if (Var->isStaticDataMember()) { | ||||||
12697 | // C++1z removes the relevant rule; the in-class declaration is always | ||||||
12698 | // a definition there. | ||||||
12699 | if (!getLangOpts().CPlusPlus17 && | ||||||
12700 | !Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
12701 | Diag(Var->getLocation(), | ||||||
12702 | diag::err_constexpr_static_mem_var_requires_init) | ||||||
12703 | << Var; | ||||||
12704 | Var->setInvalidDecl(); | ||||||
12705 | return; | ||||||
12706 | } | ||||||
12707 | } else { | ||||||
12708 | Diag(Var->getLocation(), diag::err_invalid_constexpr_var_decl); | ||||||
12709 | Var->setInvalidDecl(); | ||||||
12710 | return; | ||||||
12711 | } | ||||||
12712 | } | ||||||
12713 | |||||||
12714 | // OpenCL v1.1 s6.5.3: variables declared in the constant address space must | ||||||
12715 | // be initialized. | ||||||
12716 | if (!Var->isInvalidDecl() && | ||||||
12717 | Var->getType().getAddressSpace() == LangAS::opencl_constant && | ||||||
12718 | Var->getStorageClass() != SC_Extern && !Var->getInit()) { | ||||||
12719 | bool HasConstExprDefaultConstructor = false; | ||||||
12720 | if (CXXRecordDecl *RD = Var->getType()->getAsCXXRecordDecl()) { | ||||||
12721 | for (auto *Ctor : RD->ctors()) { | ||||||
12722 | if (Ctor->isConstexpr() && Ctor->getNumParams() == 0 && | ||||||
12723 | Ctor->getMethodQualifiers().getAddressSpace() == | ||||||
12724 | LangAS::opencl_constant) { | ||||||
12725 | HasConstExprDefaultConstructor = true; | ||||||
12726 | } | ||||||
12727 | } | ||||||
12728 | } | ||||||
12729 | if (!HasConstExprDefaultConstructor) { | ||||||
12730 | Diag(Var->getLocation(), diag::err_opencl_constant_no_init); | ||||||
12731 | Var->setInvalidDecl(); | ||||||
12732 | return; | ||||||
12733 | } | ||||||
12734 | } | ||||||
12735 | |||||||
12736 | if (!Var->isInvalidDecl() && RealDecl->hasAttr<LoaderUninitializedAttr>()) { | ||||||
12737 | if (Var->getStorageClass() == SC_Extern) { | ||||||
12738 | Diag(Var->getLocation(), diag::err_loader_uninitialized_extern_decl) | ||||||
12739 | << Var; | ||||||
12740 | Var->setInvalidDecl(); | ||||||
12741 | return; | ||||||
12742 | } | ||||||
12743 | if (RequireCompleteType(Var->getLocation(), Var->getType(), | ||||||
12744 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12745 | Var->setInvalidDecl(); | ||||||
12746 | return; | ||||||
12747 | } | ||||||
12748 | if (CXXRecordDecl *RD = Var->getType()->getAsCXXRecordDecl()) { | ||||||
12749 | if (!RD->hasTrivialDefaultConstructor()) { | ||||||
12750 | Diag(Var->getLocation(), diag::err_loader_uninitialized_trivial_ctor); | ||||||
12751 | Var->setInvalidDecl(); | ||||||
12752 | return; | ||||||
12753 | } | ||||||
12754 | } | ||||||
12755 | // The declaration is unitialized, no need for further checks. | ||||||
12756 | return; | ||||||
12757 | } | ||||||
12758 | |||||||
12759 | VarDecl::DefinitionKind DefKind = Var->isThisDeclarationADefinition(); | ||||||
12760 | if (!Var->isInvalidDecl() && DefKind != VarDecl::DeclarationOnly && | ||||||
12761 | Var->getType().hasNonTrivialToPrimitiveDefaultInitializeCUnion()) | ||||||
12762 | checkNonTrivialCUnion(Var->getType(), Var->getLocation(), | ||||||
12763 | NTCUC_DefaultInitializedObject, NTCUK_Init); | ||||||
12764 | |||||||
12765 | |||||||
12766 | switch (DefKind) { | ||||||
12767 | case VarDecl::Definition: | ||||||
12768 | if (!Var->isStaticDataMember() || !Var->getAnyInitializer()) | ||||||
12769 | break; | ||||||
12770 | |||||||
12771 | // We have an out-of-line definition of a static data member | ||||||
12772 | // that has an in-class initializer, so we type-check this like | ||||||
12773 | // a declaration. | ||||||
12774 | // | ||||||
12775 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
12776 | |||||||
12777 | case VarDecl::DeclarationOnly: | ||||||
12778 | // It's only a declaration. | ||||||
12779 | |||||||
12780 | // Block scope. C99 6.7p7: If an identifier for an object is | ||||||
12781 | // declared with no linkage (C99 6.2.2p6), the type for the | ||||||
12782 | // object shall be complete. | ||||||
12783 | if (!Type->isDependentType() && Var->isLocalVarDecl() && | ||||||
12784 | !Var->hasLinkage() && !Var->isInvalidDecl() && | ||||||
12785 | RequireCompleteType(Var->getLocation(), Type, | ||||||
12786 | diag::err_typecheck_decl_incomplete_type)) | ||||||
12787 | Var->setInvalidDecl(); | ||||||
12788 | |||||||
12789 | // Make sure that the type is not abstract. | ||||||
12790 | if (!Type->isDependentType() && !Var->isInvalidDecl() && | ||||||
12791 | RequireNonAbstractType(Var->getLocation(), Type, | ||||||
12792 | diag::err_abstract_type_in_decl, | ||||||
12793 | AbstractVariableType)) | ||||||
12794 | Var->setInvalidDecl(); | ||||||
12795 | if (!Type->isDependentType() && !Var->isInvalidDecl() && | ||||||
12796 | Var->getStorageClass() == SC_PrivateExtern) { | ||||||
12797 | Diag(Var->getLocation(), diag::warn_private_extern); | ||||||
12798 | Diag(Var->getLocation(), diag::note_private_extern); | ||||||
12799 | } | ||||||
12800 | |||||||
12801 | if (Context.getTargetInfo().allowDebugInfoForExternalRef() && | ||||||
12802 | !Var->isInvalidDecl() && !getLangOpts().CPlusPlus) | ||||||
12803 | ExternalDeclarations.push_back(Var); | ||||||
12804 | |||||||
12805 | return; | ||||||
12806 | |||||||
12807 | case VarDecl::TentativeDefinition: | ||||||
12808 | // File scope. C99 6.9.2p2: A declaration of an identifier for an | ||||||
12809 | // object that has file scope without an initializer, and without a | ||||||
12810 | // storage-class specifier or with the storage-class specifier "static", | ||||||
12811 | // constitutes a tentative definition. Note: A tentative definition with | ||||||
12812 | // external linkage is valid (C99 6.2.2p5). | ||||||
12813 | if (!Var->isInvalidDecl()) { | ||||||
12814 | if (const IncompleteArrayType *ArrayT | ||||||
12815 | = Context.getAsIncompleteArrayType(Type)) { | ||||||
12816 | if (RequireCompleteSizedType( | ||||||
12817 | Var->getLocation(), ArrayT->getElementType(), | ||||||
12818 | diag::err_array_incomplete_or_sizeless_type)) | ||||||
12819 | Var->setInvalidDecl(); | ||||||
12820 | } else if (Var->getStorageClass() == SC_Static) { | ||||||
12821 | // C99 6.9.2p3: If the declaration of an identifier for an object is | ||||||
12822 | // a tentative definition and has internal linkage (C99 6.2.2p3), the | ||||||
12823 | // declared type shall not be an incomplete type. | ||||||
12824 | // NOTE: code such as the following | ||||||
12825 | // static struct s; | ||||||
12826 | // struct s { int a; }; | ||||||
12827 | // is accepted by gcc. Hence here we issue a warning instead of | ||||||
12828 | // an error and we do not invalidate the static declaration. | ||||||
12829 | // NOTE: to avoid multiple warnings, only check the first declaration. | ||||||
12830 | if (Var->isFirstDecl()) | ||||||
12831 | RequireCompleteType(Var->getLocation(), Type, | ||||||
12832 | diag::ext_typecheck_decl_incomplete_type); | ||||||
12833 | } | ||||||
12834 | } | ||||||
12835 | |||||||
12836 | // Record the tentative definition; we're done. | ||||||
12837 | if (!Var->isInvalidDecl()) | ||||||
12838 | TentativeDefinitions.push_back(Var); | ||||||
12839 | return; | ||||||
12840 | } | ||||||
12841 | |||||||
12842 | // Provide a specific diagnostic for uninitialized variable | ||||||
12843 | // definitions with incomplete array type. | ||||||
12844 | if (Type->isIncompleteArrayType()) { | ||||||
12845 | Diag(Var->getLocation(), | ||||||
12846 | diag::err_typecheck_incomplete_array_needs_initializer); | ||||||
12847 | Var->setInvalidDecl(); | ||||||
12848 | return; | ||||||
12849 | } | ||||||
12850 | |||||||
12851 | // Provide a specific diagnostic for uninitialized variable | ||||||
12852 | // definitions with reference type. | ||||||
12853 | if (Type->isReferenceType()) { | ||||||
12854 | Diag(Var->getLocation(), diag::err_reference_var_requires_init) | ||||||
12855 | << Var << SourceRange(Var->getLocation(), Var->getLocation()); | ||||||
12856 | Var->setInvalidDecl(); | ||||||
12857 | return; | ||||||
12858 | } | ||||||
12859 | |||||||
12860 | // Do not attempt to type-check the default initializer for a | ||||||
12861 | // variable with dependent type. | ||||||
12862 | if (Type->isDependentType()) | ||||||
12863 | return; | ||||||
12864 | |||||||
12865 | if (Var->isInvalidDecl()) | ||||||
12866 | return; | ||||||
12867 | |||||||
12868 | if (!Var->hasAttr<AliasAttr>()) { | ||||||
12869 | if (RequireCompleteType(Var->getLocation(), | ||||||
12870 | Context.getBaseElementType(Type), | ||||||
12871 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12872 | Var->setInvalidDecl(); | ||||||
12873 | return; | ||||||
12874 | } | ||||||
12875 | } else { | ||||||
12876 | return; | ||||||
12877 | } | ||||||
12878 | |||||||
12879 | // The variable can not have an abstract class type. | ||||||
12880 | if (RequireNonAbstractType(Var->getLocation(), Type, | ||||||
12881 | diag::err_abstract_type_in_decl, | ||||||
12882 | AbstractVariableType)) { | ||||||
12883 | Var->setInvalidDecl(); | ||||||
12884 | return; | ||||||
12885 | } | ||||||
12886 | |||||||
12887 | // Check for jumps past the implicit initializer. C++0x | ||||||
12888 | // clarifies that this applies to a "variable with automatic | ||||||
12889 | // storage duration", not a "local variable". | ||||||
12890 | // C++11 [stmt.dcl]p3 | ||||||
12891 | // A program that jumps from a point where a variable with automatic | ||||||
12892 | // storage duration is not in scope to a point where it is in scope is | ||||||
12893 | // ill-formed unless the variable has scalar type, class type with a | ||||||
12894 | // trivial default constructor and a trivial destructor, a cv-qualified | ||||||
12895 | // version of one of these types, or an array of one of the preceding | ||||||
12896 | // types and is declared without an initializer. | ||||||
12897 | if (getLangOpts().CPlusPlus && Var->hasLocalStorage()) { | ||||||
12898 | if (const RecordType *Record | ||||||
12899 | = Context.getBaseElementType(Type)->getAs<RecordType>()) { | ||||||
12900 | CXXRecordDecl *CXXRecord = cast<CXXRecordDecl>(Record->getDecl()); | ||||||
12901 | // Mark the function (if we're in one) for further checking even if the | ||||||
12902 | // looser rules of C++11 do not require such checks, so that we can | ||||||
12903 | // diagnose incompatibilities with C++98. | ||||||
12904 | if (!CXXRecord->isPOD()) | ||||||
12905 | setFunctionHasBranchProtectedScope(); | ||||||
12906 | } | ||||||
12907 | } | ||||||
12908 | // In OpenCL, we can't initialize objects in the __local address space, | ||||||
12909 | // even implicitly, so don't synthesize an implicit initializer. | ||||||
12910 | if (getLangOpts().OpenCL && | ||||||
12911 | Var->getType().getAddressSpace() == LangAS::opencl_local) | ||||||
12912 | return; | ||||||
12913 | // C++03 [dcl.init]p9: | ||||||
12914 | // If no initializer is specified for an object, and the | ||||||
12915 | // object is of (possibly cv-qualified) non-POD class type (or | ||||||
12916 | // array thereof), the object shall be default-initialized; if | ||||||
12917 | // the object is of const-qualified type, the underlying class | ||||||
12918 | // type shall have a user-declared default | ||||||
12919 | // constructor. Otherwise, if no initializer is specified for | ||||||
12920 | // a non- static object, the object and its subobjects, if | ||||||
12921 | // any, have an indeterminate initial value); if the object | ||||||
12922 | // or any of its subobjects are of const-qualified type, the | ||||||
12923 | // program is ill-formed. | ||||||
12924 | // C++0x [dcl.init]p11: | ||||||
12925 | // If no initializer is specified for an object, the object is | ||||||
12926 | // default-initialized; [...]. | ||||||
12927 | InitializedEntity Entity = InitializedEntity::InitializeVariable(Var); | ||||||
12928 | InitializationKind Kind | ||||||
12929 | = InitializationKind::CreateDefault(Var->getLocation()); | ||||||
12930 | |||||||
12931 | InitializationSequence InitSeq(*this, Entity, Kind, None); | ||||||
12932 | ExprResult Init = InitSeq.Perform(*this, Entity, Kind, None); | ||||||
12933 | |||||||
12934 | if (Init.get()) { | ||||||
12935 | Var->setInit(MaybeCreateExprWithCleanups(Init.get())); | ||||||
12936 | // This is important for template substitution. | ||||||
12937 | Var->setInitStyle(VarDecl::CallInit); | ||||||
12938 | } else if (Init.isInvalid()) { | ||||||
12939 | // If default-init fails, attach a recovery-expr initializer to track | ||||||
12940 | // that initialization was attempted and failed. | ||||||
12941 | auto RecoveryExpr = | ||||||
12942 | CreateRecoveryExpr(Var->getLocation(), Var->getLocation(), {}); | ||||||
12943 | if (RecoveryExpr.get()) | ||||||
12944 | Var->setInit(RecoveryExpr.get()); | ||||||
12945 | } | ||||||
12946 | |||||||
12947 | CheckCompleteVariableDeclaration(Var); | ||||||
12948 | } | ||||||
12949 | } | ||||||
12950 | |||||||
12951 | void Sema::ActOnCXXForRangeDecl(Decl *D) { | ||||||
12952 | // If there is no declaration, there was an error parsing it. Ignore it. | ||||||
12953 | if (!D) | ||||||
12954 | return; | ||||||
12955 | |||||||
12956 | VarDecl *VD = dyn_cast<VarDecl>(D); | ||||||
12957 | if (!VD) { | ||||||
12958 | Diag(D->getLocation(), diag::err_for_range_decl_must_be_var); | ||||||
12959 | D->setInvalidDecl(); | ||||||
12960 | return; | ||||||
12961 | } | ||||||
12962 | |||||||
12963 | VD->setCXXForRangeDecl(true); | ||||||
12964 | |||||||
12965 | // for-range-declaration cannot be given a storage class specifier. | ||||||
12966 | int Error = -1; | ||||||
12967 | switch (VD->getStorageClass()) { | ||||||
12968 | case SC_None: | ||||||
12969 | break; | ||||||
12970 | case SC_Extern: | ||||||
12971 | Error = 0; | ||||||
12972 | break; | ||||||
12973 | case SC_Static: | ||||||
12974 | Error = 1; | ||||||
12975 | break; | ||||||
12976 | case SC_PrivateExtern: | ||||||
12977 | Error = 2; | ||||||
12978 | break; | ||||||
12979 | case SC_Auto: | ||||||
12980 | Error = 3; | ||||||
12981 | break; | ||||||
12982 | case SC_Register: | ||||||
12983 | Error = 4; | ||||||
12984 | break; | ||||||
12985 | } | ||||||
12986 | |||||||
12987 | // for-range-declaration cannot be given a storage class specifier con't. | ||||||
12988 | switch (VD->getTSCSpec()) { | ||||||
12989 | case TSCS_thread_local: | ||||||
12990 | Error = 6; | ||||||
12991 | break; | ||||||
12992 | case TSCS___thread: | ||||||
12993 | case TSCS__Thread_local: | ||||||
12994 | case TSCS_unspecified: | ||||||
12995 | break; | ||||||
12996 | } | ||||||
12997 | |||||||
12998 | if (Error != -1) { | ||||||
12999 | Diag(VD->getOuterLocStart(), diag::err_for_range_storage_class) | ||||||
13000 | << VD << Error; | ||||||
13001 | D->setInvalidDecl(); | ||||||
13002 | } | ||||||
13003 | } | ||||||
13004 | |||||||
13005 | StmtResult | ||||||
13006 | Sema::ActOnCXXForRangeIdentifier(Scope *S, SourceLocation IdentLoc, | ||||||
13007 | IdentifierInfo *Ident, | ||||||
13008 | ParsedAttributes &Attrs, | ||||||
13009 | SourceLocation AttrEnd) { | ||||||
13010 | // C++1y [stmt.iter]p1: | ||||||
13011 | // A range-based for statement of the form | ||||||
13012 | // for ( for-range-identifier : for-range-initializer ) statement | ||||||
13013 | // is equivalent to | ||||||
13014 | // for ( auto&& for-range-identifier : for-range-initializer ) statement | ||||||
13015 | DeclSpec DS(Attrs.getPool().getFactory()); | ||||||
13016 | |||||||
13017 | const char *PrevSpec; | ||||||
13018 | unsigned DiagID; | ||||||
13019 | DS.SetTypeSpecType(DeclSpec::TST_auto, IdentLoc, PrevSpec, DiagID, | ||||||
13020 | getPrintingPolicy()); | ||||||
13021 | |||||||
13022 | Declarator D(DS, DeclaratorContext::ForInit); | ||||||
13023 | D.SetIdentifier(Ident, IdentLoc); | ||||||
13024 | D.takeAttributes(Attrs, AttrEnd); | ||||||
13025 | |||||||
13026 | D.AddTypeInfo(DeclaratorChunk::getReference(0, IdentLoc, /*lvalue*/ false), | ||||||
13027 | IdentLoc); | ||||||
13028 | Decl *Var = ActOnDeclarator(S, D); | ||||||
13029 | cast<VarDecl>(Var)->setCXXForRangeDecl(true); | ||||||
13030 | FinalizeDeclaration(Var); | ||||||
13031 | return ActOnDeclStmt(FinalizeDeclaratorGroup(S, DS, Var), IdentLoc, | ||||||
13032 | AttrEnd.isValid() ? AttrEnd : IdentLoc); | ||||||
13033 | } | ||||||
13034 | |||||||
13035 | void Sema::CheckCompleteVariableDeclaration(VarDecl *var) { | ||||||
13036 | if (var->isInvalidDecl()) return; | ||||||
13037 | |||||||
13038 | MaybeAddCUDAConstantAttr(var); | ||||||
13039 | |||||||
13040 | if (getLangOpts().OpenCL) { | ||||||
13041 | // OpenCL v2.0 s6.12.5 - Every block variable declaration must have an | ||||||
13042 | // initialiser | ||||||
13043 | if (var->getTypeSourceInfo()->getType()->isBlockPointerType() && | ||||||
13044 | !var->hasInit()) { | ||||||
13045 | Diag(var->getLocation(), diag::err_opencl_invalid_block_declaration) | ||||||
13046 | << 1 /*Init*/; | ||||||
13047 | var->setInvalidDecl(); | ||||||
13048 | return; | ||||||
13049 | } | ||||||
13050 | } | ||||||
13051 | |||||||
13052 | // In Objective-C, don't allow jumps past the implicit initialization of a | ||||||
13053 | // local retaining variable. | ||||||
13054 | if (getLangOpts().ObjC && | ||||||
13055 | var->hasLocalStorage()) { | ||||||
13056 | switch (var->getType().getObjCLifetime()) { | ||||||
13057 | case Qualifiers::OCL_None: | ||||||
13058 | case Qualifiers::OCL_ExplicitNone: | ||||||
13059 | case Qualifiers::OCL_Autoreleasing: | ||||||
13060 | break; | ||||||
13061 | |||||||
13062 | case Qualifiers::OCL_Weak: | ||||||
13063 | case Qualifiers::OCL_Strong: | ||||||
13064 | setFunctionHasBranchProtectedScope(); | ||||||
13065 | break; | ||||||
13066 | } | ||||||
13067 | } | ||||||
13068 | |||||||
13069 | if (var->hasLocalStorage() && | ||||||
13070 | var->getType().isDestructedType() == QualType::DK_nontrivial_c_struct) | ||||||
13071 | setFunctionHasBranchProtectedScope(); | ||||||
13072 | |||||||
13073 | // Warn about externally-visible variables being defined without a | ||||||
13074 | // prior declaration. We only want to do this for global | ||||||
13075 | // declarations, but we also specifically need to avoid doing it for | ||||||
13076 | // class members because the linkage of an anonymous class can | ||||||
13077 | // change if it's later given a typedef name. | ||||||
13078 | if (var->isThisDeclarationADefinition() && | ||||||
13079 | var->getDeclContext()->getRedeclContext()->isFileContext() && | ||||||
13080 | var->isExternallyVisible() && var->hasLinkage() && | ||||||
13081 | !var->isInline() && !var->getDescribedVarTemplate() && | ||||||
13082 | !isa<VarTemplatePartialSpecializationDecl>(var) && | ||||||
13083 | !isTemplateInstantiation(var->getTemplateSpecializationKind()) && | ||||||
13084 | !getDiagnostics().isIgnored(diag::warn_missing_variable_declarations, | ||||||
13085 | var->getLocation())) { | ||||||
13086 | // Find a previous declaration that's not a definition. | ||||||
13087 | VarDecl *prev = var->getPreviousDecl(); | ||||||
13088 | while (prev && prev->isThisDeclarationADefinition()) | ||||||
13089 | prev = prev->getPreviousDecl(); | ||||||
13090 | |||||||
13091 | if (!prev) { | ||||||
13092 | Diag(var->getLocation(), diag::warn_missing_variable_declarations) << var; | ||||||
13093 | Diag(var->getTypeSpecStartLoc(), diag::note_static_for_internal_linkage) | ||||||
13094 | << /* variable */ 0; | ||||||
13095 | } | ||||||
13096 | } | ||||||
13097 | |||||||
13098 | // Cache the result of checking for constant initialization. | ||||||
13099 | Optional<bool> CacheHasConstInit; | ||||||
13100 | const Expr *CacheCulprit = nullptr; | ||||||
13101 | auto checkConstInit = [&]() mutable { | ||||||
13102 | if (!CacheHasConstInit) | ||||||
13103 | CacheHasConstInit = var->getInit()->isConstantInitializer( | ||||||
13104 | Context, var->getType()->isReferenceType(), &CacheCulprit); | ||||||
13105 | return *CacheHasConstInit; | ||||||
13106 | }; | ||||||
13107 | |||||||
13108 | if (var->getTLSKind() == VarDecl::TLS_Static) { | ||||||
13109 | if (var->getType().isDestructedType()) { | ||||||
13110 | // GNU C++98 edits for __thread, [basic.start.term]p3: | ||||||
13111 | // The type of an object with thread storage duration shall not | ||||||
13112 | // have a non-trivial destructor. | ||||||
13113 | Diag(var->getLocation(), diag::err_thread_nontrivial_dtor); | ||||||
13114 | if (getLangOpts().CPlusPlus11) | ||||||
13115 | Diag(var->getLocation(), diag::note_use_thread_local); | ||||||
13116 | } else if (getLangOpts().CPlusPlus && var->hasInit()) { | ||||||
13117 | if (!checkConstInit()) { | ||||||
13118 | // GNU C++98 edits for __thread, [basic.start.init]p4: | ||||||
13119 | // An object of thread storage duration shall not require dynamic | ||||||
13120 | // initialization. | ||||||
13121 | // FIXME: Need strict checking here. | ||||||
13122 | Diag(CacheCulprit->getExprLoc(), diag::err_thread_dynamic_init) | ||||||
13123 | << CacheCulprit->getSourceRange(); | ||||||
13124 | if (getLangOpts().CPlusPlus11) | ||||||
13125 | Diag(var->getLocation(), diag::note_use_thread_local); | ||||||
13126 | } | ||||||
13127 | } | ||||||
13128 | } | ||||||
13129 | |||||||
13130 | |||||||
13131 | if (!var->getType()->isStructureType() && var->hasInit() && | ||||||
13132 | isa<InitListExpr>(var->getInit())) { | ||||||
13133 | const auto *ILE = cast<InitListExpr>(var->getInit()); | ||||||
13134 | unsigned NumInits = ILE->getNumInits(); | ||||||
13135 | if (NumInits > 2) | ||||||
13136 | for (unsigned I = 0; I < NumInits; ++I) { | ||||||
13137 | const auto *Init = ILE->getInit(I); | ||||||
13138 | if (!Init) | ||||||
13139 | break; | ||||||
13140 | const auto *SL = dyn_cast<StringLiteral>(Init->IgnoreImpCasts()); | ||||||
13141 | if (!SL) | ||||||
13142 | break; | ||||||
13143 | |||||||
13144 | unsigned NumConcat = SL->getNumConcatenated(); | ||||||
13145 | // Diagnose missing comma in string array initialization. | ||||||
13146 | // Do not warn when all the elements in the initializer are concatenated | ||||||
13147 | // together. Do not warn for macros too. | ||||||
13148 | if (NumConcat == 2 && !SL->getBeginLoc().isMacroID()) { | ||||||
13149 | bool OnlyOneMissingComma = true; | ||||||
13150 | for (unsigned J = I + 1; J < NumInits; ++J) { | ||||||
13151 | const auto *Init = ILE->getInit(J); | ||||||
13152 | if (!Init) | ||||||
13153 | break; | ||||||
13154 | const auto *SLJ = dyn_cast<StringLiteral>(Init->IgnoreImpCasts()); | ||||||
13155 | if (!SLJ || SLJ->getNumConcatenated() > 1) { | ||||||
13156 | OnlyOneMissingComma = false; | ||||||
13157 | break; | ||||||
13158 | } | ||||||
13159 | } | ||||||
13160 | |||||||
13161 | if (OnlyOneMissingComma) { | ||||||
13162 | SmallVector<FixItHint, 1> Hints; | ||||||
13163 | for (unsigned i = 0; i < NumConcat - 1; ++i) | ||||||
13164 | Hints.push_back(FixItHint::CreateInsertion( | ||||||
13165 | PP.getLocForEndOfToken(SL->getStrTokenLoc(i)), ",")); | ||||||
13166 | |||||||
13167 | Diag(SL->getStrTokenLoc(1), | ||||||
13168 | diag::warn_concatenated_literal_array_init) | ||||||
13169 | << Hints; | ||||||
13170 | Diag(SL->getBeginLoc(), | ||||||
13171 | diag::note_concatenated_string_literal_silence); | ||||||
13172 | } | ||||||
13173 | // In any case, stop now. | ||||||
13174 | break; | ||||||
13175 | } | ||||||
13176 | } | ||||||
13177 | } | ||||||
13178 | |||||||
13179 | |||||||
13180 | QualType type = var->getType(); | ||||||
13181 | |||||||
13182 | if (var->hasAttr<BlocksAttr>()) | ||||||
13183 | getCurFunction()->addByrefBlockVar(var); | ||||||
13184 | |||||||
13185 | Expr *Init = var->getInit(); | ||||||
13186 | bool GlobalStorage = var->hasGlobalStorage(); | ||||||
13187 | bool IsGlobal = GlobalStorage && !var->isStaticLocal(); | ||||||
13188 | QualType baseType = Context.getBaseElementType(type); | ||||||
13189 | bool HasConstInit = true; | ||||||
13190 | |||||||
13191 | // Check whether the initializer is sufficiently constant. | ||||||
13192 | if (getLangOpts().CPlusPlus && !type->isDependentType() && Init && | ||||||
13193 | !Init->isValueDependent() && | ||||||
13194 | (GlobalStorage || var->isConstexpr() || | ||||||
13195 | var->mightBeUsableInConstantExpressions(Context))) { | ||||||
13196 | // If this variable might have a constant initializer or might be usable in | ||||||
13197 | // constant expressions, check whether or not it actually is now. We can't | ||||||
13198 | // do this lazily, because the result might depend on things that change | ||||||
13199 | // later, such as which constexpr functions happen to be defined. | ||||||
13200 | SmallVector<PartialDiagnosticAt, 8> Notes; | ||||||
13201 | if (!getLangOpts().CPlusPlus11) { | ||||||
13202 | // Prior to C++11, in contexts where a constant initializer is required, | ||||||
13203 | // the set of valid constant initializers is described by syntactic rules | ||||||
13204 | // in [expr.const]p2-6. | ||||||
13205 | // FIXME: Stricter checking for these rules would be useful for constinit / | ||||||
13206 | // -Wglobal-constructors. | ||||||
13207 | HasConstInit = checkConstInit(); | ||||||
13208 | |||||||
13209 | // Compute and cache the constant value, and remember that we have a | ||||||
13210 | // constant initializer. | ||||||
13211 | if (HasConstInit) { | ||||||
13212 | (void)var->checkForConstantInitialization(Notes); | ||||||
13213 | Notes.clear(); | ||||||
13214 | } else if (CacheCulprit) { | ||||||
13215 | Notes.emplace_back(CacheCulprit->getExprLoc(), | ||||||
13216 | PDiag(diag::note_invalid_subexpr_in_const_expr)); | ||||||
13217 | Notes.back().second << CacheCulprit->getSourceRange(); | ||||||
13218 | } | ||||||
13219 | } else { | ||||||
13220 | // Evaluate the initializer to see if it's a constant initializer. | ||||||
13221 | HasConstInit = var->checkForConstantInitialization(Notes); | ||||||
13222 | } | ||||||
13223 | |||||||
13224 | if (HasConstInit) { | ||||||
13225 | // FIXME: Consider replacing the initializer with a ConstantExpr. | ||||||
13226 | } else if (var->isConstexpr()) { | ||||||
13227 | SourceLocation DiagLoc = var->getLocation(); | ||||||
13228 | // If the note doesn't add any useful information other than a source | ||||||
13229 | // location, fold it into the primary diagnostic. | ||||||
13230 | if (Notes.size() == 1 && Notes[0].second.getDiagID() == | ||||||
13231 | diag::note_invalid_subexpr_in_const_expr) { | ||||||
13232 | DiagLoc = Notes[0].first; | ||||||
13233 | Notes.clear(); | ||||||
13234 | } | ||||||
13235 | Diag(DiagLoc, diag::err_constexpr_var_requires_const_init) | ||||||
13236 | << var << Init->getSourceRange(); | ||||||
13237 | for (unsigned I = 0, N = Notes.size(); I != N; ++I) | ||||||
13238 | Diag(Notes[I].first, Notes[I].second); | ||||||
13239 | } else if (GlobalStorage && var->hasAttr<ConstInitAttr>()) { | ||||||
13240 | auto *Attr = var->getAttr<ConstInitAttr>(); | ||||||
13241 | Diag(var->getLocation(), diag::err_require_constant_init_failed) | ||||||
13242 | << Init->getSourceRange(); | ||||||
13243 | Diag(Attr->getLocation(), diag::note_declared_required_constant_init_here) | ||||||
13244 | << Attr->getRange() << Attr->isConstinit(); | ||||||
13245 | for (auto &it : Notes) | ||||||
13246 | Diag(it.first, it.second); | ||||||
13247 | } else if (IsGlobal && | ||||||
13248 | !getDiagnostics().isIgnored(diag::warn_global_constructor, | ||||||
13249 | var->getLocation())) { | ||||||
13250 | // Warn about globals which don't have a constant initializer. Don't | ||||||
13251 | // warn about globals with a non-trivial destructor because we already | ||||||
13252 | // warned about them. | ||||||
13253 | CXXRecordDecl *RD = baseType->getAsCXXRecordDecl(); | ||||||
13254 | if (!(RD && !RD->hasTrivialDestructor())) { | ||||||
13255 | // checkConstInit() here permits trivial default initialization even in | ||||||
13256 | // C++11 onwards, where such an initializer is not a constant initializer | ||||||
13257 | // but nonetheless doesn't require a global constructor. | ||||||
13258 | if (!checkConstInit()) | ||||||
13259 | Diag(var->getLocation(), diag::warn_global_constructor) | ||||||
13260 | << Init->getSourceRange(); | ||||||
13261 | } | ||||||
13262 | } | ||||||
13263 | } | ||||||
13264 | |||||||
13265 | // Apply section attributes and pragmas to global variables. | ||||||
13266 | if (GlobalStorage && var->isThisDeclarationADefinition() && | ||||||
13267 | !inTemplateInstantiation()) { | ||||||
13268 | PragmaStack<StringLiteral *> *Stack = nullptr; | ||||||
13269 | int SectionFlags = ASTContext::PSF_Read; | ||||||
13270 | if (var->getType().isConstQualified()) { | ||||||
13271 | if (HasConstInit) | ||||||
13272 | Stack = &ConstSegStack; | ||||||
13273 | else { | ||||||
13274 | Stack = &BSSSegStack; | ||||||
13275 | SectionFlags |= ASTContext::PSF_Write; | ||||||
13276 | } | ||||||
13277 | } else if (var->hasInit() && HasConstInit) { | ||||||
13278 | Stack = &DataSegStack; | ||||||
13279 | SectionFlags |= ASTContext::PSF_Write; | ||||||
13280 | } else { | ||||||
13281 | Stack = &BSSSegStack; | ||||||
13282 | SectionFlags |= ASTContext::PSF_Write; | ||||||
13283 | } | ||||||
13284 | if (const SectionAttr *SA = var->getAttr<SectionAttr>()) { | ||||||
13285 | if (SA->getSyntax() == AttributeCommonInfo::AS_Declspec) | ||||||
13286 | SectionFlags |= ASTContext::PSF_Implicit; | ||||||
13287 | UnifySection(SA->getName(), SectionFlags, var); | ||||||
13288 | } else if (Stack->CurrentValue) { | ||||||
13289 | SectionFlags |= ASTContext::PSF_Implicit; | ||||||
13290 | auto SectionName = Stack->CurrentValue->getString(); | ||||||
13291 | var->addAttr(SectionAttr::CreateImplicit( | ||||||
13292 | Context, SectionName, Stack->CurrentPragmaLocation, | ||||||
13293 | AttributeCommonInfo::AS_Pragma, SectionAttr::Declspec_allocate)); | ||||||
13294 | if (UnifySection(SectionName, SectionFlags, var)) | ||||||
13295 | var->dropAttr<SectionAttr>(); | ||||||
13296 | } | ||||||
13297 | |||||||
13298 | // Apply the init_seg attribute if this has an initializer. If the | ||||||
13299 | // initializer turns out to not be dynamic, we'll end up ignoring this | ||||||
13300 | // attribute. | ||||||
13301 | if (CurInitSeg && var->getInit()) | ||||||
13302 | var->addAttr(InitSegAttr::CreateImplicit(Context, CurInitSeg->getString(), | ||||||
13303 | CurInitSegLoc, | ||||||
13304 | AttributeCommonInfo::AS_Pragma)); | ||||||
13305 | } | ||||||
13306 | |||||||
13307 | // All the following checks are C++ only. | ||||||
13308 | if (!getLangOpts().CPlusPlus) { | ||||||
13309 | // If this variable must be emitted, add it as an initializer for the | ||||||
13310 | // current module. | ||||||
13311 | if (Context.DeclMustBeEmitted(var) && !ModuleScopes.empty()) | ||||||
13312 | Context.addModuleInitializer(ModuleScopes.back().Module, var); | ||||||
13313 | return; | ||||||
13314 | } | ||||||
13315 | |||||||
13316 | // Require the destructor. | ||||||
13317 | if (!type->isDependentType()) | ||||||
13318 | if (const RecordType *recordType = baseType->getAs<RecordType>()) | ||||||
13319 | FinalizeVarWithDestructor(var, recordType); | ||||||
13320 | |||||||
13321 | // If this variable must be emitted, add it as an initializer for the current | ||||||
13322 | // module. | ||||||
13323 | if (Context.DeclMustBeEmitted(var) && !ModuleScopes.empty()) | ||||||
13324 | Context.addModuleInitializer(ModuleScopes.back().Module, var); | ||||||
13325 | |||||||
13326 | // Build the bindings if this is a structured binding declaration. | ||||||
13327 | if (auto *DD = dyn_cast<DecompositionDecl>(var)) | ||||||
13328 | CheckCompleteDecompositionDeclaration(DD); | ||||||
13329 | } | ||||||
13330 | |||||||
13331 | /// Check if VD needs to be dllexport/dllimport due to being in a | ||||||
13332 | /// dllexport/import function. | ||||||
13333 | void Sema::CheckStaticLocalForDllExport(VarDecl *VD) { | ||||||
13334 | assert(VD->isStaticLocal())(static_cast <bool> (VD->isStaticLocal()) ? void (0) : __assert_fail ("VD->isStaticLocal()", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 13334, __extension__ __PRETTY_FUNCTION__)); | ||||||
13335 | |||||||
13336 | auto *FD = dyn_cast_or_null<FunctionDecl>(VD->getParentFunctionOrMethod()); | ||||||
13337 | |||||||
13338 | // Find outermost function when VD is in lambda function. | ||||||
13339 | while (FD && !getDLLAttr(FD) && | ||||||
13340 | !FD->hasAttr<DLLExportStaticLocalAttr>() && | ||||||
13341 | !FD->hasAttr<DLLImportStaticLocalAttr>()) { | ||||||
13342 | FD = dyn_cast_or_null<FunctionDecl>(FD->getParentFunctionOrMethod()); | ||||||
13343 | } | ||||||
13344 | |||||||
13345 | if (!FD) | ||||||
13346 | return; | ||||||
13347 | |||||||
13348 | // Static locals inherit dll attributes from their function. | ||||||
13349 | if (Attr *A = getDLLAttr(FD)) { | ||||||
13350 | auto *NewAttr = cast<InheritableAttr>(A->clone(getASTContext())); | ||||||
13351 | NewAttr->setInherited(true); | ||||||
13352 | VD->addAttr(NewAttr); | ||||||
13353 | } else if (Attr *A = FD->getAttr<DLLExportStaticLocalAttr>()) { | ||||||
13354 | auto *NewAttr = DLLExportAttr::CreateImplicit(getASTContext(), *A); | ||||||
13355 | NewAttr->setInherited(true); | ||||||
13356 | VD->addAttr(NewAttr); | ||||||
13357 | |||||||
13358 | // Export this function to enforce exporting this static variable even | ||||||
13359 | // if it is not used in this compilation unit. | ||||||
13360 | if (!FD->hasAttr<DLLExportAttr>()) | ||||||
13361 | FD->addAttr(NewAttr); | ||||||
13362 | |||||||
13363 | } else if (Attr *A = FD->getAttr<DLLImportStaticLocalAttr>()) { | ||||||
13364 | auto *NewAttr = DLLImportAttr::CreateImplicit(getASTContext(), *A); | ||||||
13365 | NewAttr->setInherited(true); | ||||||
13366 | VD->addAttr(NewAttr); | ||||||
13367 | } | ||||||
13368 | } | ||||||
13369 | |||||||
13370 | /// FinalizeDeclaration - called by ParseDeclarationAfterDeclarator to perform | ||||||
13371 | /// any semantic actions necessary after any initializer has been attached. | ||||||
13372 | void Sema::FinalizeDeclaration(Decl *ThisDecl) { | ||||||
13373 | // Note that we are no longer parsing the initializer for this declaration. | ||||||
13374 | ParsingInitForAutoVars.erase(ThisDecl); | ||||||
13375 | |||||||
13376 | VarDecl *VD = dyn_cast_or_null<VarDecl>(ThisDecl); | ||||||
13377 | if (!VD) | ||||||
13378 | return; | ||||||
13379 | |||||||
13380 | // Apply an implicit SectionAttr if '#pragma clang section bss|data|rodata' is active | ||||||
13381 | if (VD->hasGlobalStorage() && VD->isThisDeclarationADefinition() && | ||||||
13382 | !inTemplateInstantiation() && !VD->hasAttr<SectionAttr>()) { | ||||||
13383 | if (PragmaClangBSSSection.Valid) | ||||||
13384 | VD->addAttr(PragmaClangBSSSectionAttr::CreateImplicit( | ||||||
13385 | Context, PragmaClangBSSSection.SectionName, | ||||||
13386 | PragmaClangBSSSection.PragmaLocation, | ||||||
13387 | AttributeCommonInfo::AS_Pragma)); | ||||||
13388 | if (PragmaClangDataSection.Valid) | ||||||
13389 | VD->addAttr(PragmaClangDataSectionAttr::CreateImplicit( | ||||||
13390 | Context, PragmaClangDataSection.SectionName, | ||||||
13391 | PragmaClangDataSection.PragmaLocation, | ||||||
13392 | AttributeCommonInfo::AS_Pragma)); | ||||||
13393 | if (PragmaClangRodataSection.Valid) | ||||||
13394 | VD->addAttr(PragmaClangRodataSectionAttr::CreateImplicit( | ||||||
13395 | Context, PragmaClangRodataSection.SectionName, | ||||||
13396 | PragmaClangRodataSection.PragmaLocation, | ||||||
13397 | AttributeCommonInfo::AS_Pragma)); | ||||||
13398 | if (PragmaClangRelroSection.Valid) | ||||||
13399 | VD->addAttr(PragmaClangRelroSectionAttr::CreateImplicit( | ||||||
13400 | Context, PragmaClangRelroSection.SectionName, | ||||||
13401 | PragmaClangRelroSection.PragmaLocation, | ||||||
13402 | AttributeCommonInfo::AS_Pragma)); | ||||||
13403 | } | ||||||
13404 | |||||||
13405 | if (auto *DD = dyn_cast<DecompositionDecl>(ThisDecl)) { | ||||||
13406 | for (auto *BD : DD->bindings()) { | ||||||
13407 | FinalizeDeclaration(BD); | ||||||
13408 | } | ||||||
13409 | } | ||||||
13410 | |||||||
13411 | checkAttributesAfterMerging(*this, *VD); | ||||||
13412 | |||||||
13413 | // Perform TLS alignment check here after attributes attached to the variable | ||||||
13414 | // which may affect the alignment have been processed. Only perform the check | ||||||
13415 | // if the target has a maximum TLS alignment (zero means no constraints). | ||||||
13416 | if (unsigned MaxAlign = Context.getTargetInfo().getMaxTLSAlign()) { | ||||||
13417 | // Protect the check so that it's not performed on dependent types and | ||||||
13418 | // dependent alignments (we can't determine the alignment in that case). | ||||||
13419 | if (VD->getTLSKind() && !VD->hasDependentAlignment()) { | ||||||
13420 | CharUnits MaxAlignChars = Context.toCharUnitsFromBits(MaxAlign); | ||||||
13421 | if (Context.getDeclAlign(VD) > MaxAlignChars) { | ||||||
13422 | Diag(VD->getLocation(), diag::err_tls_var_aligned_over_maximum) | ||||||
13423 | << (unsigned)Context.getDeclAlign(VD).getQuantity() << VD | ||||||
13424 | << (unsigned)MaxAlignChars.getQuantity(); | ||||||
13425 | } | ||||||
13426 | } | ||||||
13427 | } | ||||||
13428 | |||||||
13429 | if (VD->isStaticLocal()) | ||||||
13430 | CheckStaticLocalForDllExport(VD); | ||||||
13431 | |||||||
13432 | // Perform check for initializers of device-side global variables. | ||||||
13433 | // CUDA allows empty constructors as initializers (see E.2.3.1, CUDA | ||||||
13434 | // 7.5). We must also apply the same checks to all __shared__ | ||||||
13435 | // variables whether they are local or not. CUDA also allows | ||||||
13436 | // constant initializers for __constant__ and __device__ variables. | ||||||
13437 | if (getLangOpts().CUDA) | ||||||
13438 | checkAllowedCUDAInitializer(VD); | ||||||
13439 | |||||||
13440 | // Grab the dllimport or dllexport attribute off of the VarDecl. | ||||||
13441 | const InheritableAttr *DLLAttr = getDLLAttr(VD); | ||||||
13442 | |||||||
13443 | // Imported static data members cannot be defined out-of-line. | ||||||
13444 | if (const auto *IA = dyn_cast_or_null<DLLImportAttr>(DLLAttr)) { | ||||||
13445 | if (VD->isStaticDataMember() && VD->isOutOfLine() && | ||||||
13446 | VD->isThisDeclarationADefinition()) { | ||||||
13447 | // We allow definitions of dllimport class template static data members | ||||||
13448 | // with a warning. | ||||||
13449 | CXXRecordDecl *Context = | ||||||
13450 | cast<CXXRecordDecl>(VD->getFirstDecl()->getDeclContext()); | ||||||
13451 | bool IsClassTemplateMember = | ||||||
13452 | isa<ClassTemplatePartialSpecializationDecl>(Context) || | ||||||
13453 | Context->getDescribedClassTemplate(); | ||||||
13454 | |||||||
13455 | Diag(VD->getLocation(), | ||||||
13456 | IsClassTemplateMember | ||||||
13457 | ? diag::warn_attribute_dllimport_static_field_definition | ||||||
13458 | : diag::err_attribute_dllimport_static_field_definition); | ||||||
13459 | Diag(IA->getLocation(), diag::note_attribute); | ||||||
13460 | if (!IsClassTemplateMember) | ||||||
13461 | VD->setInvalidDecl(); | ||||||
13462 | } | ||||||
13463 | } | ||||||
13464 | |||||||
13465 | // dllimport/dllexport variables cannot be thread local, their TLS index | ||||||
13466 | // isn't exported with the variable. | ||||||
13467 | if (DLLAttr && VD->getTLSKind()) { | ||||||
13468 | auto *F = dyn_cast_or_null<FunctionDecl>(VD->getParentFunctionOrMethod()); | ||||||
13469 | if (F && getDLLAttr(F)) { | ||||||
13470 | assert(VD->isStaticLocal())(static_cast <bool> (VD->isStaticLocal()) ? void (0) : __assert_fail ("VD->isStaticLocal()", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 13470, __extension__ __PRETTY_FUNCTION__)); | ||||||
13471 | // But if this is a static local in a dlimport/dllexport function, the | ||||||
13472 | // function will never be inlined, which means the var would never be | ||||||
13473 | // imported, so having it marked import/export is safe. | ||||||
13474 | } else { | ||||||
13475 | Diag(VD->getLocation(), diag::err_attribute_dll_thread_local) << VD | ||||||
13476 | << DLLAttr; | ||||||
13477 | VD->setInvalidDecl(); | ||||||
13478 | } | ||||||
13479 | } | ||||||
13480 | |||||||
13481 | if (UsedAttr *Attr = VD->getAttr<UsedAttr>()) { | ||||||
13482 | if (!Attr->isInherited() && !VD->isThisDeclarationADefinition()) { | ||||||
13483 | Diag(Attr->getLocation(), diag::warn_attribute_ignored_on_non_definition) | ||||||
13484 | << Attr; | ||||||
13485 | VD->dropAttr<UsedAttr>(); | ||||||
13486 | } | ||||||
13487 | } | ||||||
13488 | if (RetainAttr *Attr = VD->getAttr<RetainAttr>()) { | ||||||
13489 | if (!Attr->isInherited() && !VD->isThisDeclarationADefinition()) { | ||||||
13490 | Diag(Attr->getLocation(), diag::warn_attribute_ignored_on_non_definition) | ||||||
13491 | << Attr; | ||||||
13492 | VD->dropAttr<RetainAttr>(); | ||||||
13493 | } | ||||||
13494 | } | ||||||
13495 | |||||||
13496 | const DeclContext *DC = VD->getDeclContext(); | ||||||
13497 | // If there's a #pragma GCC visibility in scope, and this isn't a class | ||||||
13498 | // member, set the visibility of this variable. | ||||||
13499 | if (DC->getRedeclContext()->isFileContext() && VD->isExternallyVisible()) | ||||||
13500 | AddPushedVisibilityAttribute(VD); | ||||||
13501 | |||||||
13502 | // FIXME: Warn on unused var template partial specializations. | ||||||
13503 | if (VD->isFileVarDecl() && !isa<VarTemplatePartialSpecializationDecl>(VD)) | ||||||
13504 | MarkUnusedFileScopedDecl(VD); | ||||||
13505 | |||||||
13506 | // Now we have parsed the initializer and can update the table of magic | ||||||
13507 | // tag values. | ||||||
13508 | if (!VD->hasAttr<TypeTagForDatatypeAttr>() || | ||||||
13509 | !VD->getType()->isIntegralOrEnumerationType()) | ||||||
13510 | return; | ||||||
13511 | |||||||
13512 | for (const auto *I : ThisDecl->specific_attrs<TypeTagForDatatypeAttr>()) { | ||||||
13513 | const Expr *MagicValueExpr = VD->getInit(); | ||||||
13514 | if (!MagicValueExpr) { | ||||||
13515 | continue; | ||||||
13516 | } | ||||||
13517 | Optional<llvm::APSInt> MagicValueInt; | ||||||
13518 | if (!(MagicValueInt = MagicValueExpr->getIntegerConstantExpr(Context))) { | ||||||
13519 | Diag(I->getRange().getBegin(), | ||||||
13520 | diag::err_type_tag_for_datatype_not_ice) | ||||||
13521 | << LangOpts.CPlusPlus << MagicValueExpr->getSourceRange(); | ||||||
13522 | continue; | ||||||
13523 | } | ||||||
13524 | if (MagicValueInt->getActiveBits() > 64) { | ||||||
13525 | Diag(I->getRange().getBegin(), | ||||||
13526 | diag::err_type_tag_for_datatype_too_large) | ||||||
13527 | << LangOpts.CPlusPlus << MagicValueExpr->getSourceRange(); | ||||||
13528 | continue; | ||||||
13529 | } | ||||||
13530 | uint64_t MagicValue = MagicValueInt->getZExtValue(); | ||||||
13531 | RegisterTypeTagForDatatype(I->getArgumentKind(), | ||||||
13532 | MagicValue, | ||||||
13533 | I->getMatchingCType(), | ||||||
13534 | I->getLayoutCompatible(), | ||||||
13535 | I->getMustBeNull()); | ||||||
13536 | } | ||||||
13537 | } | ||||||
13538 | |||||||
13539 | static bool hasDeducedAuto(DeclaratorDecl *DD) { | ||||||
13540 | auto *VD = dyn_cast<VarDecl>(DD); | ||||||
13541 | return VD && !VD->getType()->hasAutoForTrailingReturnType(); | ||||||
13542 | } | ||||||
13543 | |||||||
13544 | Sema::DeclGroupPtrTy Sema::FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, | ||||||
13545 | ArrayRef<Decl *> Group) { | ||||||
13546 | SmallVector<Decl*, 8> Decls; | ||||||
13547 | |||||||
13548 | if (DS.isTypeSpecOwned()) | ||||||
13549 | Decls.push_back(DS.getRepAsDecl()); | ||||||
13550 | |||||||
13551 | DeclaratorDecl *FirstDeclaratorInGroup = nullptr; | ||||||
13552 | DecompositionDecl *FirstDecompDeclaratorInGroup = nullptr; | ||||||
13553 | bool DiagnosedMultipleDecomps = false; | ||||||
13554 | DeclaratorDecl *FirstNonDeducedAutoInGroup = nullptr; | ||||||
13555 | bool DiagnosedNonDeducedAuto = false; | ||||||
13556 | |||||||
13557 | for (unsigned i = 0, e = Group.size(); i != e; ++i) { | ||||||
13558 | if (Decl *D = Group[i]) { | ||||||
13559 | // For declarators, there are some additional syntactic-ish checks we need | ||||||
13560 | // to perform. | ||||||
13561 | if (auto *DD = dyn_cast<DeclaratorDecl>(D)) { | ||||||
13562 | if (!FirstDeclaratorInGroup) | ||||||
13563 | FirstDeclaratorInGroup = DD; | ||||||
13564 | if (!FirstDecompDeclaratorInGroup) | ||||||
13565 | FirstDecompDeclaratorInGroup = dyn_cast<DecompositionDecl>(D); | ||||||
13566 | if (!FirstNonDeducedAutoInGroup && DS.hasAutoTypeSpec() && | ||||||
13567 | !hasDeducedAuto(DD)) | ||||||
13568 | FirstNonDeducedAutoInGroup = DD; | ||||||
13569 | |||||||
13570 | if (FirstDeclaratorInGroup != DD) { | ||||||
13571 | // A decomposition declaration cannot be combined with any other | ||||||
13572 | // declaration in the same group. | ||||||
13573 | if (FirstDecompDeclaratorInGroup && !DiagnosedMultipleDecomps) { | ||||||
13574 | Diag(FirstDecompDeclaratorInGroup->getLocation(), | ||||||
13575 | diag::err_decomp_decl_not_alone) | ||||||
13576 | << FirstDeclaratorInGroup->getSourceRange() | ||||||
13577 | << DD->getSourceRange(); | ||||||
13578 | DiagnosedMultipleDecomps = true; | ||||||
13579 | } | ||||||
13580 | |||||||
13581 | // A declarator that uses 'auto' in any way other than to declare a | ||||||
13582 | // variable with a deduced type cannot be combined with any other | ||||||
13583 | // declarator in the same group. | ||||||
13584 | if (FirstNonDeducedAutoInGroup && !DiagnosedNonDeducedAuto) { | ||||||
13585 | Diag(FirstNonDeducedAutoInGroup->getLocation(), | ||||||
13586 | diag::err_auto_non_deduced_not_alone) | ||||||
13587 | << FirstNonDeducedAutoInGroup->getType() | ||||||
13588 | ->hasAutoForTrailingReturnType() | ||||||
13589 | << FirstDeclaratorInGroup->getSourceRange() | ||||||
13590 | << DD->getSourceRange(); | ||||||
13591 | DiagnosedNonDeducedAuto = true; | ||||||
13592 | } | ||||||
13593 | } | ||||||
13594 | } | ||||||
13595 | |||||||
13596 | Decls.push_back(D); | ||||||
13597 | } | ||||||
13598 | } | ||||||
13599 | |||||||
13600 | if (DeclSpec::isDeclRep(DS.getTypeSpecType())) { | ||||||
13601 | if (TagDecl *Tag = dyn_cast_or_null<TagDecl>(DS.getRepAsDecl())) { | ||||||
13602 | handleTagNumbering(Tag, S); | ||||||
13603 | if (FirstDeclaratorInGroup && !Tag->hasNameForLinkage() && | ||||||
13604 | getLangOpts().CPlusPlus) | ||||||
13605 | Context.addDeclaratorForUnnamedTagDecl(Tag, FirstDeclaratorInGroup); | ||||||
13606 | } | ||||||
13607 | } | ||||||
13608 | |||||||
13609 | return BuildDeclaratorGroup(Decls); | ||||||
13610 | } | ||||||
13611 | |||||||
13612 | /// BuildDeclaratorGroup - convert a list of declarations into a declaration | ||||||
13613 | /// group, performing any necessary semantic checking. | ||||||
13614 | Sema::DeclGroupPtrTy | ||||||
13615 | Sema::BuildDeclaratorGroup(MutableArrayRef<Decl *> Group) { | ||||||
13616 | // C++14 [dcl.spec.auto]p7: (DR1347) | ||||||
13617 | // If the type that replaces the placeholder type is not the same in each | ||||||
13618 | // deduction, the program is ill-formed. | ||||||
13619 | if (Group.size() > 1) { | ||||||
13620 | QualType Deduced; | ||||||
13621 | VarDecl *DeducedDecl = nullptr; | ||||||
13622 | for (unsigned i = 0, e = Group.size(); i != e; ++i) { | ||||||
13623 | VarDecl *D = dyn_cast<VarDecl>(Group[i]); | ||||||
13624 | if (!D || D->isInvalidDecl()) | ||||||
13625 | break; | ||||||
13626 | DeducedType *DT = D->getType()->getContainedDeducedType(); | ||||||
13627 | if (!DT || DT->getDeducedType().isNull()) | ||||||
13628 | continue; | ||||||
13629 | if (Deduced.isNull()) { | ||||||
13630 | Deduced = DT->getDeducedType(); | ||||||
13631 | DeducedDecl = D; | ||||||
13632 | } else if (!Context.hasSameType(DT->getDeducedType(), Deduced)) { | ||||||
13633 | auto *AT = dyn_cast<AutoType>(DT); | ||||||
13634 | auto Dia = Diag(D->getTypeSourceInfo()->getTypeLoc().getBeginLoc(), | ||||||
13635 | diag::err_auto_different_deductions) | ||||||
13636 | << (AT ? (unsigned)AT->getKeyword() : 3) << Deduced | ||||||
13637 | << DeducedDecl->getDeclName() << DT->getDeducedType() | ||||||
13638 | << D->getDeclName(); | ||||||
13639 | if (DeducedDecl->hasInit()) | ||||||
13640 | Dia << DeducedDecl->getInit()->getSourceRange(); | ||||||
13641 | if (D->getInit()) | ||||||
13642 | Dia << D->getInit()->getSourceRange(); | ||||||
13643 | D->setInvalidDecl(); | ||||||
13644 | break; | ||||||
13645 | } | ||||||
13646 | } | ||||||
13647 | } | ||||||
13648 | |||||||
13649 | ActOnDocumentableDecls(Group); | ||||||
13650 | |||||||
13651 | return DeclGroupPtrTy::make( | ||||||
13652 | DeclGroupRef::Create(Context, Group.data(), Group.size())); | ||||||
13653 | } | ||||||
13654 | |||||||
13655 | void Sema::ActOnDocumentableDecl(Decl *D) { | ||||||
13656 | ActOnDocumentableDecls(D); | ||||||
13657 | } | ||||||
13658 | |||||||
13659 | void Sema::ActOnDocumentableDecls(ArrayRef<Decl *> Group) { | ||||||
13660 | // Don't parse the comment if Doxygen diagnostics are ignored. | ||||||
13661 | if (Group.empty() || !Group[0]) | ||||||
13662 | return; | ||||||
13663 | |||||||
13664 | if (Diags.isIgnored(diag::warn_doc_param_not_found, | ||||||
13665 | Group[0]->getLocation()) && | ||||||
13666 | Diags.isIgnored(diag::warn_unknown_comment_command_name, | ||||||
13667 | Group[0]->getLocation())) | ||||||
13668 | return; | ||||||
13669 | |||||||
13670 | if (Group.size() >= 2) { | ||||||
13671 | // This is a decl group. Normally it will contain only declarations | ||||||
13672 | // produced from declarator list. But in case we have any definitions or | ||||||
13673 | // additional declaration references: | ||||||
13674 | // 'typedef struct S {} S;' | ||||||
13675 | // 'typedef struct S *S;' | ||||||
13676 | // 'struct S *pS;' | ||||||
13677 | // FinalizeDeclaratorGroup adds these as separate declarations. | ||||||
13678 | Decl *MaybeTagDecl = Group[0]; | ||||||
13679 | if (MaybeTagDecl && isa<TagDecl>(MaybeTagDecl)) { | ||||||
13680 | Group = Group.slice(1); | ||||||
13681 | } | ||||||
13682 | } | ||||||
13683 | |||||||
13684 | // FIMXE: We assume every Decl in the group is in the same file. | ||||||
13685 | // This is false when preprocessor constructs the group from decls in | ||||||
13686 | // different files (e. g. macros or #include). | ||||||
13687 | Context.attachCommentsToJustParsedDecls(Group, &getPreprocessor()); | ||||||
13688 | } | ||||||
13689 | |||||||
13690 | /// Common checks for a parameter-declaration that should apply to both function | ||||||
13691 | /// parameters and non-type template parameters. | ||||||
13692 | void Sema::CheckFunctionOrTemplateParamDeclarator(Scope *S, Declarator &D) { | ||||||
13693 | // Check that there are no default arguments inside the type of this | ||||||
13694 | // parameter. | ||||||
13695 | if (getLangOpts().CPlusPlus) | ||||||
13696 | CheckExtraCXXDefaultArguments(D); | ||||||
13697 | |||||||
13698 | // Parameter declarators cannot be qualified (C++ [dcl.meaning]p1). | ||||||
13699 | if (D.getCXXScopeSpec().isSet()) { | ||||||
13700 | Diag(D.getIdentifierLoc(), diag::err_qualified_param_declarator) | ||||||
13701 | << D.getCXXScopeSpec().getRange(); | ||||||
13702 | } | ||||||
13703 | |||||||
13704 | // [dcl.meaning]p1: An unqualified-id occurring in a declarator-id shall be a | ||||||
13705 | // simple identifier except [...irrelevant cases...]. | ||||||
13706 | switch (D.getName().getKind()) { | ||||||
13707 | case UnqualifiedIdKind::IK_Identifier: | ||||||
13708 | break; | ||||||
13709 | |||||||
13710 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||
13711 | case UnqualifiedIdKind::IK_ConversionFunctionId: | ||||||
13712 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||
13713 | case UnqualifiedIdKind::IK_ConstructorName: | ||||||
13714 | case UnqualifiedIdKind::IK_DestructorName: | ||||||
13715 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||
13716 | case UnqualifiedIdKind::IK_DeductionGuideName: | ||||||
13717 | Diag(D.getIdentifierLoc(), diag::err_bad_parameter_name) | ||||||
13718 | << GetNameForDeclarator(D).getName(); | ||||||
13719 | break; | ||||||
13720 | |||||||
13721 | case UnqualifiedIdKind::IK_TemplateId: | ||||||
13722 | case UnqualifiedIdKind::IK_ConstructorTemplateId: | ||||||
13723 | // GetNameForDeclarator would not produce a useful name in this case. | ||||||
13724 | Diag(D.getIdentifierLoc(), diag::err_bad_parameter_name_template_id); | ||||||
13725 | break; | ||||||
13726 | } | ||||||
13727 | } | ||||||
13728 | |||||||
13729 | /// ActOnParamDeclarator - Called from Parser::ParseFunctionDeclarator() | ||||||
13730 | /// to introduce parameters into function prototype scope. | ||||||
13731 | Decl *Sema::ActOnParamDeclarator(Scope *S, Declarator &D) { | ||||||
13732 | const DeclSpec &DS = D.getDeclSpec(); | ||||||
13733 | |||||||
13734 | // Verify C99 6.7.5.3p2: The only SCS allowed is 'register'. | ||||||
13735 | |||||||
13736 | // C++03 [dcl.stc]p2 also permits 'auto'. | ||||||
13737 | StorageClass SC = SC_None; | ||||||
13738 | if (DS.getStorageClassSpec() == DeclSpec::SCS_register) { | ||||||
13739 | SC = SC_Register; | ||||||
13740 | // In C++11, the 'register' storage class specifier is deprecated. | ||||||
13741 | // In C++17, it is not allowed, but we tolerate it as an extension. | ||||||
13742 | if (getLangOpts().CPlusPlus11) { | ||||||
13743 | Diag(DS.getStorageClassSpecLoc(), | ||||||
13744 | getLangOpts().CPlusPlus17 ? diag::ext_register_storage_class | ||||||
13745 | : diag::warn_deprecated_register) | ||||||
13746 | << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); | ||||||
13747 | } | ||||||
13748 | } else if (getLangOpts().CPlusPlus && | ||||||
13749 | DS.getStorageClassSpec() == DeclSpec::SCS_auto) { | ||||||
13750 | SC = SC_Auto; | ||||||
13751 | } else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) { | ||||||
13752 | Diag(DS.getStorageClassSpecLoc(), | ||||||
13753 | diag::err_invalid_storage_class_in_func_decl); | ||||||
13754 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||
13755 | } | ||||||
13756 | |||||||
13757 | if (DeclSpec::TSCS TSCS = DS.getThreadStorageClassSpec()) | ||||||
13758 | Diag(DS.getThreadStorageClassSpecLoc(), diag::err_invalid_thread) | ||||||
13759 | << DeclSpec::getSpecifierName(TSCS); | ||||||
13760 | if (DS.isInlineSpecified()) | ||||||
13761 | Diag(DS.getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
13762 | << getLangOpts().CPlusPlus17; | ||||||
13763 | if (DS.hasConstexprSpecifier()) | ||||||
13764 | Diag(DS.getConstexprSpecLoc(), diag::err_invalid_constexpr) | ||||||
13765 | << 0 << static_cast<int>(D.getDeclSpec().getConstexprSpecifier()); | ||||||
13766 | |||||||
13767 | DiagnoseFunctionSpecifiers(DS); | ||||||
13768 | |||||||
13769 | CheckFunctionOrTemplateParamDeclarator(S, D); | ||||||
13770 | |||||||
13771 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
13772 | QualType parmDeclType = TInfo->getType(); | ||||||
13773 | |||||||
13774 | // Check for redeclaration of parameters, e.g. int foo(int x, int x); | ||||||
13775 | IdentifierInfo *II = D.getIdentifier(); | ||||||
13776 | if (II) { | ||||||
13777 | LookupResult R(*this, II, D.getIdentifierLoc(), LookupOrdinaryName, | ||||||
13778 | ForVisibleRedeclaration); | ||||||
13779 | LookupName(R, S); | ||||||
13780 | if (R.isSingleResult()) { | ||||||
13781 | NamedDecl *PrevDecl = R.getFoundDecl(); | ||||||
13782 | if (PrevDecl->isTemplateParameter()) { | ||||||
13783 | // Maybe we will complain about the shadowed template parameter. | ||||||
13784 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||
13785 | // Just pretend that we didn't see the previous declaration. | ||||||
13786 | PrevDecl = nullptr; | ||||||
13787 | } else if (S->isDeclScope(PrevDecl)) { | ||||||
13788 | Diag(D.getIdentifierLoc(), diag::err_param_redefinition) << II; | ||||||
13789 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
13790 | |||||||
13791 | // Recover by removing the name | ||||||
13792 | II = nullptr; | ||||||
13793 | D.SetIdentifier(nullptr, D.getIdentifierLoc()); | ||||||
13794 | D.setInvalidType(true); | ||||||
13795 | } | ||||||
13796 | } | ||||||
13797 | } | ||||||
13798 | |||||||
13799 | // Temporarily put parameter variables in the translation unit, not | ||||||
13800 | // the enclosing context. This prevents them from accidentally | ||||||
13801 | // looking like class members in C++. | ||||||
13802 | ParmVarDecl *New = | ||||||
13803 | CheckParameter(Context.getTranslationUnitDecl(), D.getBeginLoc(), | ||||||
13804 | D.getIdentifierLoc(), II, parmDeclType, TInfo, SC); | ||||||
13805 | |||||||
13806 | if (D.isInvalidType()) | ||||||
13807 | New->setInvalidDecl(); | ||||||
13808 | |||||||
13809 | assert(S->isFunctionPrototypeScope())(static_cast <bool> (S->isFunctionPrototypeScope()) ? void (0) : __assert_fail ("S->isFunctionPrototypeScope()" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 13809, __extension__ __PRETTY_FUNCTION__)); | ||||||
13810 | assert(S->getFunctionPrototypeDepth() >= 1)(static_cast <bool> (S->getFunctionPrototypeDepth() >= 1) ? void (0) : __assert_fail ("S->getFunctionPrototypeDepth() >= 1" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 13810, __extension__ __PRETTY_FUNCTION__)); | ||||||
13811 | New->setScopeInfo(S->getFunctionPrototypeDepth() - 1, | ||||||
13812 | S->getNextFunctionPrototypeIndex()); | ||||||
13813 | |||||||
13814 | // Add the parameter declaration into this scope. | ||||||
13815 | S->AddDecl(New); | ||||||
13816 | if (II) | ||||||
13817 | IdResolver.AddDecl(New); | ||||||
13818 | |||||||
13819 | ProcessDeclAttributes(S, New, D); | ||||||
13820 | |||||||
13821 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
13822 | Diag(New->getLocation(), diag::err_module_private_local) | ||||||
13823 | << 1 << New << SourceRange(D.getDeclSpec().getModulePrivateSpecLoc()) | ||||||
13824 | << FixItHint::CreateRemoval(D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
13825 | |||||||
13826 | if (New->hasAttr<BlocksAttr>()) { | ||||||
13827 | Diag(New->getLocation(), diag::err_block_on_nonlocal); | ||||||
13828 | } | ||||||
13829 | |||||||
13830 | if (getLangOpts().OpenCL) | ||||||
13831 | deduceOpenCLAddressSpace(New); | ||||||
13832 | |||||||
13833 | return New; | ||||||
13834 | } | ||||||
13835 | |||||||
13836 | /// Synthesizes a variable for a parameter arising from a | ||||||
13837 | /// typedef. | ||||||
13838 | ParmVarDecl *Sema::BuildParmVarDeclForTypedef(DeclContext *DC, | ||||||
13839 | SourceLocation Loc, | ||||||
13840 | QualType T) { | ||||||
13841 | /* FIXME: setting StartLoc == Loc. | ||||||
13842 | Would it be worth to modify callers so as to provide proper source | ||||||
13843 | location for the unnamed parameters, embedding the parameter's type? */ | ||||||
13844 | ParmVarDecl *Param = ParmVarDecl::Create(Context, DC, Loc, Loc, nullptr, | ||||||
13845 | T, Context.getTrivialTypeSourceInfo(T, Loc), | ||||||
13846 | SC_None, nullptr); | ||||||
13847 | Param->setImplicit(); | ||||||
13848 | return Param; | ||||||
13849 | } | ||||||
13850 | |||||||
13851 | void Sema::DiagnoseUnusedParameters(ArrayRef<ParmVarDecl *> Parameters) { | ||||||
13852 | // Don't diagnose unused-parameter errors in template instantiations; we | ||||||
13853 | // will already have done so in the template itself. | ||||||
13854 | if (inTemplateInstantiation()) | ||||||
13855 | return; | ||||||
13856 | |||||||
13857 | for (const ParmVarDecl *Parameter : Parameters) { | ||||||
13858 | if (!Parameter->isReferenced() && Parameter->getDeclName() && | ||||||
13859 | !Parameter->hasAttr<UnusedAttr>()) { | ||||||
13860 | Diag(Parameter->getLocation(), diag::warn_unused_parameter) | ||||||
13861 | << Parameter->getDeclName(); | ||||||
13862 | } | ||||||
13863 | } | ||||||
13864 | } | ||||||
13865 | |||||||
13866 | void Sema::DiagnoseSizeOfParametersAndReturnValue( | ||||||
13867 | ArrayRef<ParmVarDecl *> Parameters, QualType ReturnTy, NamedDecl *D) { | ||||||
13868 | if (LangOpts.NumLargeByValueCopy == 0) // No check. | ||||||
13869 | return; | ||||||
13870 | |||||||
13871 | // Warn if the return value is pass-by-value and larger than the specified | ||||||
13872 | // threshold. | ||||||
13873 | if (!ReturnTy->isDependentType() && ReturnTy.isPODType(Context)) { | ||||||
13874 | unsigned Size = Context.getTypeSizeInChars(ReturnTy).getQuantity(); | ||||||
13875 | if (Size > LangOpts.NumLargeByValueCopy) | ||||||
13876 | Diag(D->getLocation(), diag::warn_return_value_size) << D << Size; | ||||||
13877 | } | ||||||
13878 | |||||||
13879 | // Warn if any parameter is pass-by-value and larger than the specified | ||||||
13880 | // threshold. | ||||||
13881 | for (const ParmVarDecl *Parameter : Parameters) { | ||||||
13882 | QualType T = Parameter->getType(); | ||||||
13883 | if (T->isDependentType() || !T.isPODType(Context)) | ||||||
13884 | continue; | ||||||
13885 | unsigned Size = Context.getTypeSizeInChars(T).getQuantity(); | ||||||
13886 | if (Size > LangOpts.NumLargeByValueCopy) | ||||||
13887 | Diag(Parameter->getLocation(), diag::warn_parameter_size) | ||||||
13888 | << Parameter << Size; | ||||||
13889 | } | ||||||
13890 | } | ||||||
13891 | |||||||
13892 | ParmVarDecl *Sema::CheckParameter(DeclContext *DC, SourceLocation StartLoc, | ||||||
13893 | SourceLocation NameLoc, IdentifierInfo *Name, | ||||||
13894 | QualType T, TypeSourceInfo *TSInfo, | ||||||
13895 | StorageClass SC) { | ||||||
13896 | // In ARC, infer a lifetime qualifier for appropriate parameter types. | ||||||
13897 | if (getLangOpts().ObjCAutoRefCount && | ||||||
13898 | T.getObjCLifetime() == Qualifiers::OCL_None && | ||||||
13899 | T->isObjCLifetimeType()) { | ||||||
13900 | |||||||
13901 | Qualifiers::ObjCLifetime lifetime; | ||||||
13902 | |||||||
13903 | // Special cases for arrays: | ||||||
13904 | // - if it's const, use __unsafe_unretained | ||||||
13905 | // - otherwise, it's an error | ||||||
13906 | if (T->isArrayType()) { | ||||||
13907 | if (!T.isConstQualified()) { | ||||||
13908 | if (DelayedDiagnostics.shouldDelayDiagnostics()) | ||||||
13909 | DelayedDiagnostics.add( | ||||||
13910 | sema::DelayedDiagnostic::makeForbiddenType( | ||||||
13911 | NameLoc, diag::err_arc_array_param_no_ownership, T, false)); | ||||||
13912 | else | ||||||
13913 | Diag(NameLoc, diag::err_arc_array_param_no_ownership) | ||||||
13914 | << TSInfo->getTypeLoc().getSourceRange(); | ||||||
13915 | } | ||||||
13916 | lifetime = Qualifiers::OCL_ExplicitNone; | ||||||
13917 | } else { | ||||||
13918 | lifetime = T->getObjCARCImplicitLifetime(); | ||||||
13919 | } | ||||||
13920 | T = Context.getLifetimeQualifiedType(T, lifetime); | ||||||
13921 | } | ||||||
13922 | |||||||
13923 | ParmVarDecl *New = ParmVarDecl::Create(Context, DC, StartLoc, NameLoc, Name, | ||||||
13924 | Context.getAdjustedParameterType(T), | ||||||
13925 | TSInfo, SC, nullptr); | ||||||
13926 | |||||||
13927 | // Make a note if we created a new pack in the scope of a lambda, so that | ||||||
13928 | // we know that references to that pack must also be expanded within the | ||||||
13929 | // lambda scope. | ||||||
13930 | if (New->isParameterPack()) | ||||||
13931 | if (auto *LSI = getEnclosingLambda()) | ||||||
13932 | LSI->LocalPacks.push_back(New); | ||||||
13933 | |||||||
13934 | if (New->getType().hasNonTrivialToPrimitiveDestructCUnion() || | ||||||
13935 | New->getType().hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
13936 | checkNonTrivialCUnion(New->getType(), New->getLocation(), | ||||||
13937 | NTCUC_FunctionParam, NTCUK_Destruct|NTCUK_Copy); | ||||||
13938 | |||||||
13939 | // Parameters can not be abstract class types. | ||||||
13940 | // For record types, this is done by the AbstractClassUsageDiagnoser once | ||||||
13941 | // the class has been completely parsed. | ||||||
13942 | if (!CurContext->isRecord() && | ||||||
13943 | RequireNonAbstractType(NameLoc, T, diag::err_abstract_type_in_decl, | ||||||
13944 | AbstractParamType)) | ||||||
13945 | New->setInvalidDecl(); | ||||||
13946 | |||||||
13947 | // Parameter declarators cannot be interface types. All ObjC objects are | ||||||
13948 | // passed by reference. | ||||||
13949 | if (T->isObjCObjectType()) { | ||||||
13950 | SourceLocation TypeEndLoc = | ||||||
13951 | getLocForEndOfToken(TSInfo->getTypeLoc().getEndLoc()); | ||||||
13952 | Diag(NameLoc, | ||||||
13953 | diag::err_object_cannot_be_passed_returned_by_value) << 1 << T | ||||||
13954 | << FixItHint::CreateInsertion(TypeEndLoc, "*"); | ||||||
13955 | T = Context.getObjCObjectPointerType(T); | ||||||
13956 | New->setType(T); | ||||||
13957 | } | ||||||
13958 | |||||||
13959 | // ISO/IEC TR 18037 S6.7.3: "The type of an object with automatic storage | ||||||
13960 | // duration shall not be qualified by an address-space qualifier." | ||||||
13961 | // Since all parameters have automatic store duration, they can not have | ||||||
13962 | // an address space. | ||||||
13963 | if (T.getAddressSpace() != LangAS::Default && | ||||||
13964 | // OpenCL allows function arguments declared to be an array of a type | ||||||
13965 | // to be qualified with an address space. | ||||||
13966 | !(getLangOpts().OpenCL && | ||||||
13967 | (T->isArrayType() || T.getAddressSpace() == LangAS::opencl_private))) { | ||||||
13968 | Diag(NameLoc, diag::err_arg_with_address_space); | ||||||
13969 | New->setInvalidDecl(); | ||||||
13970 | } | ||||||
13971 | |||||||
13972 | // PPC MMA non-pointer types are not allowed as function argument types. | ||||||
13973 | if (Context.getTargetInfo().getTriple().isPPC64() && | ||||||
13974 | CheckPPCMMAType(New->getOriginalType(), New->getLocation())) { | ||||||
13975 | New->setInvalidDecl(); | ||||||
13976 | } | ||||||
13977 | |||||||
13978 | return New; | ||||||
13979 | } | ||||||
13980 | |||||||
13981 | void Sema::ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, | ||||||
13982 | SourceLocation LocAfterDecls) { | ||||||
13983 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||||
13984 | |||||||
13985 | // Verify 6.9.1p6: 'every identifier in the identifier list shall be declared' | ||||||
13986 | // for a K&R function. | ||||||
13987 | if (!FTI.hasPrototype) { | ||||||
13988 | for (int i = FTI.NumParams; i != 0; /* decrement in loop */) { | ||||||
13989 | --i; | ||||||
13990 | if (FTI.Params[i].Param == nullptr) { | ||||||
13991 | SmallString<256> Code; | ||||||
13992 | llvm::raw_svector_ostream(Code) | ||||||
13993 | << " int " << FTI.Params[i].Ident->getName() << ";\n"; | ||||||
13994 | Diag(FTI.Params[i].IdentLoc, diag::ext_param_not_declared) | ||||||
13995 | << FTI.Params[i].Ident | ||||||
13996 | << FixItHint::CreateInsertion(LocAfterDecls, Code); | ||||||
13997 | |||||||
13998 | // Implicitly declare the argument as type 'int' for lack of a better | ||||||
13999 | // type. | ||||||
14000 | AttributeFactory attrs; | ||||||
14001 | DeclSpec DS(attrs); | ||||||
14002 | const char* PrevSpec; // unused | ||||||
14003 | unsigned DiagID; // unused | ||||||
14004 | DS.SetTypeSpecType(DeclSpec::TST_int, FTI.Params[i].IdentLoc, PrevSpec, | ||||||
14005 | DiagID, Context.getPrintingPolicy()); | ||||||
14006 | // Use the identifier location for the type source range. | ||||||
14007 | DS.SetRangeStart(FTI.Params[i].IdentLoc); | ||||||
14008 | DS.SetRangeEnd(FTI.Params[i].IdentLoc); | ||||||
14009 | Declarator ParamD(DS, DeclaratorContext::KNRTypeList); | ||||||
14010 | ParamD.SetIdentifier(FTI.Params[i].Ident, FTI.Params[i].IdentLoc); | ||||||
14011 | FTI.Params[i].Param = ActOnParamDeclarator(S, ParamD); | ||||||
14012 | } | ||||||
14013 | } | ||||||
14014 | } | ||||||
14015 | } | ||||||
14016 | |||||||
14017 | Decl * | ||||||
14018 | Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Declarator &D, | ||||||
14019 | MultiTemplateParamsArg TemplateParameterLists, | ||||||
14020 | SkipBodyInfo *SkipBody) { | ||||||
14021 | assert(getCurFunctionDecl() == nullptr && "Function parsing confused")(static_cast <bool> (getCurFunctionDecl() == nullptr && "Function parsing confused") ? void (0) : __assert_fail ("getCurFunctionDecl() == nullptr && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14021, __extension__ __PRETTY_FUNCTION__)); | ||||||
14022 | assert(D.isFunctionDeclarator() && "Not a function declarator!")(static_cast <bool> (D.isFunctionDeclarator() && "Not a function declarator!") ? void (0) : __assert_fail ("D.isFunctionDeclarator() && \"Not a function declarator!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14022, __extension__ __PRETTY_FUNCTION__)); | ||||||
14023 | Scope *ParentScope = FnBodyScope->getParent(); | ||||||
14024 | |||||||
14025 | // Check if we are in an `omp begin/end declare variant` scope. If we are, and | ||||||
14026 | // we define a non-templated function definition, we will create a declaration | ||||||
14027 | // instead (=BaseFD), and emit the definition with a mangled name afterwards. | ||||||
14028 | // The base function declaration will have the equivalent of an `omp declare | ||||||
14029 | // variant` annotation which specifies the mangled definition as a | ||||||
14030 | // specialization function under the OpenMP context defined as part of the | ||||||
14031 | // `omp begin declare variant`. | ||||||
14032 | SmallVector<FunctionDecl *, 4> Bases; | ||||||
14033 | if (LangOpts.OpenMP && isInOpenMPDeclareVariantScope()) | ||||||
14034 | ActOnStartOfFunctionDefinitionInOpenMPDeclareVariantScope( | ||||||
14035 | ParentScope, D, TemplateParameterLists, Bases); | ||||||
14036 | |||||||
14037 | D.setFunctionDefinitionKind(FunctionDefinitionKind::Definition); | ||||||
14038 | Decl *DP = HandleDeclarator(ParentScope, D, TemplateParameterLists); | ||||||
14039 | Decl *Dcl = ActOnStartOfFunctionDef(FnBodyScope, DP, SkipBody); | ||||||
14040 | |||||||
14041 | if (!Bases.empty()) | ||||||
14042 | ActOnFinishedFunctionDefinitionInOpenMPDeclareVariantScope(Dcl, Bases); | ||||||
14043 | |||||||
14044 | return Dcl; | ||||||
14045 | } | ||||||
14046 | |||||||
14047 | void Sema::ActOnFinishInlineFunctionDef(FunctionDecl *D) { | ||||||
14048 | Consumer.HandleInlineFunctionDefinition(D); | ||||||
14049 | } | ||||||
14050 | |||||||
14051 | static bool | ||||||
14052 | ShouldWarnAboutMissingPrototype(const FunctionDecl *FD, | ||||||
14053 | const FunctionDecl *&PossiblePrototype) { | ||||||
14054 | // Don't warn about invalid declarations. | ||||||
14055 | if (FD->isInvalidDecl()) | ||||||
14056 | return false; | ||||||
14057 | |||||||
14058 | // Or declarations that aren't global. | ||||||
14059 | if (!FD->isGlobal()) | ||||||
14060 | return false; | ||||||
14061 | |||||||
14062 | // Don't warn about C++ member functions. | ||||||
14063 | if (isa<CXXMethodDecl>(FD)) | ||||||
14064 | return false; | ||||||
14065 | |||||||
14066 | // Don't warn about 'main'. | ||||||
14067 | if (isa<TranslationUnitDecl>(FD->getDeclContext()->getRedeclContext())) | ||||||
14068 | if (IdentifierInfo *II = FD->getIdentifier()) | ||||||
14069 | if (II->isStr("main") || II->isStr("efi_main")) | ||||||
14070 | return false; | ||||||
14071 | |||||||
14072 | // Don't warn about inline functions. | ||||||
14073 | if (FD->isInlined()) | ||||||
14074 | return false; | ||||||
14075 | |||||||
14076 | // Don't warn about function templates. | ||||||
14077 | if (FD->getDescribedFunctionTemplate()) | ||||||
14078 | return false; | ||||||
14079 | |||||||
14080 | // Don't warn about function template specializations. | ||||||
14081 | if (FD->isFunctionTemplateSpecialization()) | ||||||
14082 | return false; | ||||||
14083 | |||||||
14084 | // Don't warn for OpenCL kernels. | ||||||
14085 | if (FD->hasAttr<OpenCLKernelAttr>()) | ||||||
14086 | return false; | ||||||
14087 | |||||||
14088 | // Don't warn on explicitly deleted functions. | ||||||
14089 | if (FD->isDeleted()) | ||||||
14090 | return false; | ||||||
14091 | |||||||
14092 | for (const FunctionDecl *Prev = FD->getPreviousDecl(); | ||||||
14093 | Prev; Prev = Prev->getPreviousDecl()) { | ||||||
14094 | // Ignore any declarations that occur in function or method | ||||||
14095 | // scope, because they aren't visible from the header. | ||||||
14096 | if (Prev->getLexicalDeclContext()->isFunctionOrMethod()) | ||||||
14097 | continue; | ||||||
14098 | |||||||
14099 | PossiblePrototype = Prev; | ||||||
14100 | return Prev->getType()->isFunctionNoProtoType(); | ||||||
14101 | } | ||||||
14102 | |||||||
14103 | return true; | ||||||
14104 | } | ||||||
14105 | |||||||
14106 | void | ||||||
14107 | Sema::CheckForFunctionRedefinition(FunctionDecl *FD, | ||||||
14108 | const FunctionDecl *EffectiveDefinition, | ||||||
14109 | SkipBodyInfo *SkipBody) { | ||||||
14110 | const FunctionDecl *Definition = EffectiveDefinition; | ||||||
14111 | if (!Definition && | ||||||
14112 | !FD->isDefined(Definition, /*CheckForPendingFriendDefinition*/ true)) | ||||||
14113 | return; | ||||||
14114 | |||||||
14115 | if (Definition->getFriendObjectKind() != Decl::FOK_None) { | ||||||
14116 | if (FunctionDecl *OrigDef = Definition->getInstantiatedFromMemberFunction()) { | ||||||
14117 | if (FunctionDecl *OrigFD = FD->getInstantiatedFromMemberFunction()) { | ||||||
14118 | // A merged copy of the same function, instantiated as a member of | ||||||
14119 | // the same class, is OK. | ||||||
14120 | if (declaresSameEntity(OrigFD, OrigDef) && | ||||||
14121 | declaresSameEntity(cast<Decl>(Definition->getLexicalDeclContext()), | ||||||
14122 | cast<Decl>(FD->getLexicalDeclContext()))) | ||||||
14123 | return; | ||||||
14124 | } | ||||||
14125 | } | ||||||
14126 | } | ||||||
14127 | |||||||
14128 | if (canRedefineFunction(Definition, getLangOpts())) | ||||||
14129 | return; | ||||||
14130 | |||||||
14131 | // Don't emit an error when this is redefinition of a typo-corrected | ||||||
14132 | // definition. | ||||||
14133 | if (TypoCorrectedFunctionDefinitions.count(Definition)) | ||||||
14134 | return; | ||||||
14135 | |||||||
14136 | // If we don't have a visible definition of the function, and it's inline or | ||||||
14137 | // a template, skip the new definition. | ||||||
14138 | if (SkipBody && !hasVisibleDefinition(Definition) && | ||||||
14139 | (Definition->getFormalLinkage() == InternalLinkage || | ||||||
14140 | Definition->isInlined() || | ||||||
14141 | Definition->getDescribedFunctionTemplate() || | ||||||
14142 | Definition->getNumTemplateParameterLists())) { | ||||||
14143 | SkipBody->ShouldSkip = true; | ||||||
14144 | SkipBody->Previous = const_cast<FunctionDecl*>(Definition); | ||||||
14145 | if (auto *TD = Definition->getDescribedFunctionTemplate()) | ||||||
14146 | makeMergedDefinitionVisible(TD); | ||||||
14147 | makeMergedDefinitionVisible(const_cast<FunctionDecl*>(Definition)); | ||||||
14148 | return; | ||||||
14149 | } | ||||||
14150 | |||||||
14151 | if (getLangOpts().GNUMode && Definition->isInlineSpecified() && | ||||||
14152 | Definition->getStorageClass() == SC_Extern) | ||||||
14153 | Diag(FD->getLocation(), diag::err_redefinition_extern_inline) | ||||||
14154 | << FD << getLangOpts().CPlusPlus; | ||||||
14155 | else | ||||||
14156 | Diag(FD->getLocation(), diag::err_redefinition) << FD; | ||||||
14157 | |||||||
14158 | Diag(Definition->getLocation(), diag::note_previous_definition); | ||||||
14159 | FD->setInvalidDecl(); | ||||||
14160 | } | ||||||
14161 | |||||||
14162 | static void RebuildLambdaScopeInfo(CXXMethodDecl *CallOperator, | ||||||
14163 | Sema &S) { | ||||||
14164 | CXXRecordDecl *const LambdaClass = CallOperator->getParent(); | ||||||
14165 | |||||||
14166 | LambdaScopeInfo *LSI = S.PushLambdaScope(); | ||||||
14167 | LSI->CallOperator = CallOperator; | ||||||
14168 | LSI->Lambda = LambdaClass; | ||||||
14169 | LSI->ReturnType = CallOperator->getReturnType(); | ||||||
14170 | const LambdaCaptureDefault LCD = LambdaClass->getLambdaCaptureDefault(); | ||||||
14171 | |||||||
14172 | if (LCD == LCD_None) | ||||||
14173 | LSI->ImpCaptureStyle = CapturingScopeInfo::ImpCap_None; | ||||||
14174 | else if (LCD == LCD_ByCopy) | ||||||
14175 | LSI->ImpCaptureStyle = CapturingScopeInfo::ImpCap_LambdaByval; | ||||||
14176 | else if (LCD == LCD_ByRef) | ||||||
14177 | LSI->ImpCaptureStyle = CapturingScopeInfo::ImpCap_LambdaByref; | ||||||
14178 | DeclarationNameInfo DNI = CallOperator->getNameInfo(); | ||||||
14179 | |||||||
14180 | LSI->IntroducerRange = DNI.getCXXOperatorNameRange(); | ||||||
14181 | LSI->Mutable = !CallOperator->isConst(); | ||||||
14182 | |||||||
14183 | // Add the captures to the LSI so they can be noted as already | ||||||
14184 | // captured within tryCaptureVar. | ||||||
14185 | auto I = LambdaClass->field_begin(); | ||||||
14186 | for (const auto &C : LambdaClass->captures()) { | ||||||
14187 | if (C.capturesVariable()) { | ||||||
14188 | VarDecl *VD = C.getCapturedVar(); | ||||||
14189 | if (VD->isInitCapture()) | ||||||
14190 | S.CurrentInstantiationScope->InstantiatedLocal(VD, VD); | ||||||
14191 | const bool ByRef = C.getCaptureKind() == LCK_ByRef; | ||||||
14192 | LSI->addCapture(VD, /*IsBlock*/false, ByRef, | ||||||
14193 | /*RefersToEnclosingVariableOrCapture*/true, C.getLocation(), | ||||||
14194 | /*EllipsisLoc*/C.isPackExpansion() | ||||||
14195 | ? C.getEllipsisLoc() : SourceLocation(), | ||||||
14196 | I->getType(), /*Invalid*/false); | ||||||
14197 | |||||||
14198 | } else if (C.capturesThis()) { | ||||||
14199 | LSI->addThisCapture(/*Nested*/ false, C.getLocation(), I->getType(), | ||||||
14200 | C.getCaptureKind() == LCK_StarThis); | ||||||
14201 | } else { | ||||||
14202 | LSI->addVLATypeCapture(C.getLocation(), I->getCapturedVLAType(), | ||||||
14203 | I->getType()); | ||||||
14204 | } | ||||||
14205 | ++I; | ||||||
14206 | } | ||||||
14207 | } | ||||||
14208 | |||||||
14209 | Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Decl *D, | ||||||
14210 | SkipBodyInfo *SkipBody) { | ||||||
14211 | if (!D) { | ||||||
14212 | // Parsing the function declaration failed in some way. Push on a fake scope | ||||||
14213 | // anyway so we can try to parse the function body. | ||||||
14214 | PushFunctionScope(); | ||||||
14215 | PushExpressionEvaluationContext(ExprEvalContexts.back().Context); | ||||||
14216 | return D; | ||||||
14217 | } | ||||||
14218 | |||||||
14219 | FunctionDecl *FD = nullptr; | ||||||
14220 | |||||||
14221 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D)) | ||||||
14222 | FD = FunTmpl->getTemplatedDecl(); | ||||||
14223 | else | ||||||
14224 | FD = cast<FunctionDecl>(D); | ||||||
14225 | |||||||
14226 | // Do not push if it is a lambda because one is already pushed when building | ||||||
14227 | // the lambda in ActOnStartOfLambdaDefinition(). | ||||||
14228 | if (!isLambdaCallOperator(FD)) | ||||||
14229 | PushExpressionEvaluationContext( | ||||||
14230 | FD->isConsteval() ? ExpressionEvaluationContext::ConstantEvaluated | ||||||
14231 | : ExprEvalContexts.back().Context); | ||||||
14232 | |||||||
14233 | // Check for defining attributes before the check for redefinition. | ||||||
14234 | if (const auto *Attr = FD->getAttr<AliasAttr>()) { | ||||||
14235 | Diag(Attr->getLocation(), diag::err_alias_is_definition) << FD << 0; | ||||||
14236 | FD->dropAttr<AliasAttr>(); | ||||||
14237 | FD->setInvalidDecl(); | ||||||
14238 | } | ||||||
14239 | if (const auto *Attr = FD->getAttr<IFuncAttr>()) { | ||||||
14240 | Diag(Attr->getLocation(), diag::err_alias_is_definition) << FD << 1; | ||||||
14241 | FD->dropAttr<IFuncAttr>(); | ||||||
14242 | FD->setInvalidDecl(); | ||||||
14243 | } | ||||||
14244 | |||||||
14245 | if (auto *Ctor = dyn_cast<CXXConstructorDecl>(FD)) { | ||||||
14246 | if (Ctor->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && | ||||||
14247 | Ctor->isDefaultConstructor() && | ||||||
14248 | Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
14249 | // If this is an MS ABI dllexport default constructor, instantiate any | ||||||
14250 | // default arguments. | ||||||
14251 | InstantiateDefaultCtorDefaultArgs(Ctor); | ||||||
14252 | } | ||||||
14253 | } | ||||||
14254 | |||||||
14255 | // See if this is a redefinition. If 'will have body' (or similar) is already | ||||||
14256 | // set, then these checks were already performed when it was set. | ||||||
14257 | if (!FD->willHaveBody() && !FD->isLateTemplateParsed() && | ||||||
14258 | !FD->isThisDeclarationInstantiatedFromAFriendDefinition()) { | ||||||
14259 | CheckForFunctionRedefinition(FD, nullptr, SkipBody); | ||||||
14260 | |||||||
14261 | // If we're skipping the body, we're done. Don't enter the scope. | ||||||
14262 | if (SkipBody && SkipBody->ShouldSkip) | ||||||
14263 | return D; | ||||||
14264 | } | ||||||
14265 | |||||||
14266 | // Mark this function as "will have a body eventually". This lets users to | ||||||
14267 | // call e.g. isInlineDefinitionExternallyVisible while we're still parsing | ||||||
14268 | // this function. | ||||||
14269 | FD->setWillHaveBody(); | ||||||
14270 | |||||||
14271 | // If we are instantiating a generic lambda call operator, push | ||||||
14272 | // a LambdaScopeInfo onto the function stack. But use the information | ||||||
14273 | // that's already been calculated (ActOnLambdaExpr) to prime the current | ||||||
14274 | // LambdaScopeInfo. | ||||||
14275 | // When the template operator is being specialized, the LambdaScopeInfo, | ||||||
14276 | // has to be properly restored so that tryCaptureVariable doesn't try | ||||||
14277 | // and capture any new variables. In addition when calculating potential | ||||||
14278 | // captures during transformation of nested lambdas, it is necessary to | ||||||
14279 | // have the LSI properly restored. | ||||||
14280 | if (isGenericLambdaCallOperatorSpecialization(FD)) { | ||||||
14281 | assert(inTemplateInstantiation() &&(static_cast <bool> (inTemplateInstantiation() && "There should be an active template instantiation on the stack " "when instantiating a generic lambda!") ? void (0) : __assert_fail ("inTemplateInstantiation() && \"There should be an active template instantiation on the stack \" \"when instantiating a generic lambda!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14283, __extension__ __PRETTY_FUNCTION__)) | ||||||
14282 | "There should be an active template instantiation on the stack "(static_cast <bool> (inTemplateInstantiation() && "There should be an active template instantiation on the stack " "when instantiating a generic lambda!") ? void (0) : __assert_fail ("inTemplateInstantiation() && \"There should be an active template instantiation on the stack \" \"when instantiating a generic lambda!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14283, __extension__ __PRETTY_FUNCTION__)) | ||||||
14283 | "when instantiating a generic lambda!")(static_cast <bool> (inTemplateInstantiation() && "There should be an active template instantiation on the stack " "when instantiating a generic lambda!") ? void (0) : __assert_fail ("inTemplateInstantiation() && \"There should be an active template instantiation on the stack \" \"when instantiating a generic lambda!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14283, __extension__ __PRETTY_FUNCTION__)); | ||||||
14284 | RebuildLambdaScopeInfo(cast<CXXMethodDecl>(D), *this); | ||||||
14285 | } else { | ||||||
14286 | // Enter a new function scope | ||||||
14287 | PushFunctionScope(); | ||||||
14288 | } | ||||||
14289 | |||||||
14290 | // Builtin functions cannot be defined. | ||||||
14291 | if (unsigned BuiltinID = FD->getBuiltinID()) { | ||||||
14292 | if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID) && | ||||||
14293 | !Context.BuiltinInfo.isPredefinedRuntimeFunction(BuiltinID)) { | ||||||
14294 | Diag(FD->getLocation(), diag::err_builtin_definition) << FD; | ||||||
14295 | FD->setInvalidDecl(); | ||||||
14296 | } | ||||||
14297 | } | ||||||
14298 | |||||||
14299 | // The return type of a function definition must be complete | ||||||
14300 | // (C99 6.9.1p3, C++ [dcl.fct]p6). | ||||||
14301 | QualType ResultType = FD->getReturnType(); | ||||||
14302 | if (!ResultType->isDependentType() && !ResultType->isVoidType() && | ||||||
14303 | !FD->isInvalidDecl() && | ||||||
14304 | RequireCompleteType(FD->getLocation(), ResultType, | ||||||
14305 | diag::err_func_def_incomplete_result)) | ||||||
14306 | FD->setInvalidDecl(); | ||||||
14307 | |||||||
14308 | if (FnBodyScope) | ||||||
14309 | PushDeclContext(FnBodyScope, FD); | ||||||
14310 | |||||||
14311 | // Check the validity of our function parameters | ||||||
14312 | CheckParmsForFunctionDef(FD->parameters(), | ||||||
14313 | /*CheckParameterNames=*/true); | ||||||
14314 | |||||||
14315 | // Add non-parameter declarations already in the function to the current | ||||||
14316 | // scope. | ||||||
14317 | if (FnBodyScope) { | ||||||
14318 | for (Decl *NPD : FD->decls()) { | ||||||
14319 | auto *NonParmDecl = dyn_cast<NamedDecl>(NPD); | ||||||
14320 | if (!NonParmDecl) | ||||||
14321 | continue; | ||||||
14322 | assert(!isa<ParmVarDecl>(NonParmDecl) &&(static_cast <bool> (!isa<ParmVarDecl>(NonParmDecl ) && "parameters should not be in newly created FD yet" ) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(NonParmDecl) && \"parameters should not be in newly created FD yet\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14323, __extension__ __PRETTY_FUNCTION__)) | ||||||
14323 | "parameters should not be in newly created FD yet")(static_cast <bool> (!isa<ParmVarDecl>(NonParmDecl ) && "parameters should not be in newly created FD yet" ) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(NonParmDecl) && \"parameters should not be in newly created FD yet\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14323, __extension__ __PRETTY_FUNCTION__)); | ||||||
14324 | |||||||
14325 | // If the decl has a name, make it accessible in the current scope. | ||||||
14326 | if (NonParmDecl->getDeclName()) | ||||||
14327 | PushOnScopeChains(NonParmDecl, FnBodyScope, /*AddToContext=*/false); | ||||||
14328 | |||||||
14329 | // Similarly, dive into enums and fish their constants out, making them | ||||||
14330 | // accessible in this scope. | ||||||
14331 | if (auto *ED = dyn_cast<EnumDecl>(NonParmDecl)) { | ||||||
14332 | for (auto *EI : ED->enumerators()) | ||||||
14333 | PushOnScopeChains(EI, FnBodyScope, /*AddToContext=*/false); | ||||||
14334 | } | ||||||
14335 | } | ||||||
14336 | } | ||||||
14337 | |||||||
14338 | // Introduce our parameters into the function scope | ||||||
14339 | for (auto Param : FD->parameters()) { | ||||||
14340 | Param->setOwningFunction(FD); | ||||||
14341 | |||||||
14342 | // If this has an identifier, add it to the scope stack. | ||||||
14343 | if (Param->getIdentifier() && FnBodyScope) { | ||||||
14344 | CheckShadow(FnBodyScope, Param); | ||||||
14345 | |||||||
14346 | PushOnScopeChains(Param, FnBodyScope); | ||||||
14347 | } | ||||||
14348 | } | ||||||
14349 | |||||||
14350 | // Ensure that the function's exception specification is instantiated. | ||||||
14351 | if (const FunctionProtoType *FPT = FD->getType()->getAs<FunctionProtoType>()) | ||||||
14352 | ResolveExceptionSpec(D->getLocation(), FPT); | ||||||
14353 | |||||||
14354 | // dllimport cannot be applied to non-inline function definitions. | ||||||
14355 | if (FD->hasAttr<DLLImportAttr>() && !FD->isInlined() && | ||||||
14356 | !FD->isTemplateInstantiation()) { | ||||||
14357 | assert(!FD->hasAttr<DLLExportAttr>())(static_cast <bool> (!FD->hasAttr<DLLExportAttr> ()) ? void (0) : __assert_fail ("!FD->hasAttr<DLLExportAttr>()" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14357, __extension__ __PRETTY_FUNCTION__)); | ||||||
14358 | Diag(FD->getLocation(), diag::err_attribute_dllimport_function_definition); | ||||||
14359 | FD->setInvalidDecl(); | ||||||
14360 | return D; | ||||||
14361 | } | ||||||
14362 | // We want to attach documentation to original Decl (which might be | ||||||
14363 | // a function template). | ||||||
14364 | ActOnDocumentableDecl(D); | ||||||
14365 | if (getCurLexicalContext()->isObjCContainer() && | ||||||
14366 | getCurLexicalContext()->getDeclKind() != Decl::ObjCCategoryImpl && | ||||||
14367 | getCurLexicalContext()->getDeclKind() != Decl::ObjCImplementation) | ||||||
14368 | Diag(FD->getLocation(), diag::warn_function_def_in_objc_container); | ||||||
14369 | |||||||
14370 | return D; | ||||||
14371 | } | ||||||
14372 | |||||||
14373 | /// Given the set of return statements within a function body, | ||||||
14374 | /// compute the variables that are subject to the named return value | ||||||
14375 | /// optimization. | ||||||
14376 | /// | ||||||
14377 | /// Each of the variables that is subject to the named return value | ||||||
14378 | /// optimization will be marked as NRVO variables in the AST, and any | ||||||
14379 | /// return statement that has a marked NRVO variable as its NRVO candidate can | ||||||
14380 | /// use the named return value optimization. | ||||||
14381 | /// | ||||||
14382 | /// This function applies a very simplistic algorithm for NRVO: if every return | ||||||
14383 | /// statement in the scope of a variable has the same NRVO candidate, that | ||||||
14384 | /// candidate is an NRVO variable. | ||||||
14385 | void Sema::computeNRVO(Stmt *Body, FunctionScopeInfo *Scope) { | ||||||
14386 | ReturnStmt **Returns = Scope->Returns.data(); | ||||||
14387 | |||||||
14388 | for (unsigned I = 0, E = Scope->Returns.size(); I != E; ++I) { | ||||||
14389 | if (const VarDecl *NRVOCandidate = Returns[I]->getNRVOCandidate()) { | ||||||
14390 | if (!NRVOCandidate->isNRVOVariable()) | ||||||
14391 | Returns[I]->setNRVOCandidate(nullptr); | ||||||
14392 | } | ||||||
14393 | } | ||||||
14394 | } | ||||||
14395 | |||||||
14396 | bool Sema::canDelayFunctionBody(const Declarator &D) { | ||||||
14397 | // We can't delay parsing the body of a constexpr function template (yet). | ||||||
14398 | if (D.getDeclSpec().hasConstexprSpecifier()) | ||||||
14399 | return false; | ||||||
14400 | |||||||
14401 | // We can't delay parsing the body of a function template with a deduced | ||||||
14402 | // return type (yet). | ||||||
14403 | if (D.getDeclSpec().hasAutoTypeSpec()) { | ||||||
14404 | // If the placeholder introduces a non-deduced trailing return type, | ||||||
14405 | // we can still delay parsing it. | ||||||
14406 | if (D.getNumTypeObjects()) { | ||||||
14407 | const auto &Outer = D.getTypeObject(D.getNumTypeObjects() - 1); | ||||||
14408 | if (Outer.Kind == DeclaratorChunk::Function && | ||||||
14409 | Outer.Fun.hasTrailingReturnType()) { | ||||||
14410 | QualType Ty = GetTypeFromParser(Outer.Fun.getTrailingReturnType()); | ||||||
14411 | return Ty.isNull() || !Ty->isUndeducedType(); | ||||||
14412 | } | ||||||
14413 | } | ||||||
14414 | return false; | ||||||
14415 | } | ||||||
14416 | |||||||
14417 | return true; | ||||||
14418 | } | ||||||
14419 | |||||||
14420 | bool Sema::canSkipFunctionBody(Decl *D) { | ||||||
14421 | // We cannot skip the body of a function (or function template) which is | ||||||
14422 | // constexpr, since we may need to evaluate its body in order to parse the | ||||||
14423 | // rest of the file. | ||||||
14424 | // We cannot skip the body of a function with an undeduced return type, | ||||||
14425 | // because any callers of that function need to know the type. | ||||||
14426 | if (const FunctionDecl *FD = D->getAsFunction()) { | ||||||
14427 | if (FD->isConstexpr()) | ||||||
14428 | return false; | ||||||
14429 | // We can't simply call Type::isUndeducedType here, because inside template | ||||||
14430 | // auto can be deduced to a dependent type, which is not considered | ||||||
14431 | // "undeduced". | ||||||
14432 | if (FD->getReturnType()->getContainedDeducedType()) | ||||||
14433 | return false; | ||||||
14434 | } | ||||||
14435 | return Consumer.shouldSkipFunctionBody(D); | ||||||
14436 | } | ||||||
14437 | |||||||
14438 | Decl *Sema::ActOnSkippedFunctionBody(Decl *Decl) { | ||||||
14439 | if (!Decl) | ||||||
14440 | return nullptr; | ||||||
14441 | if (FunctionDecl *FD = Decl->getAsFunction()) | ||||||
14442 | FD->setHasSkippedBody(); | ||||||
14443 | else if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(Decl)) | ||||||
14444 | MD->setHasSkippedBody(); | ||||||
14445 | return Decl; | ||||||
14446 | } | ||||||
14447 | |||||||
14448 | Decl *Sema::ActOnFinishFunctionBody(Decl *D, Stmt *BodyArg) { | ||||||
14449 | return ActOnFinishFunctionBody(D, BodyArg, false); | ||||||
14450 | } | ||||||
14451 | |||||||
14452 | /// RAII object that pops an ExpressionEvaluationContext when exiting a function | ||||||
14453 | /// body. | ||||||
14454 | class ExitFunctionBodyRAII { | ||||||
14455 | public: | ||||||
14456 | ExitFunctionBodyRAII(Sema &S, bool IsLambda) : S(S), IsLambda(IsLambda) {} | ||||||
14457 | ~ExitFunctionBodyRAII() { | ||||||
14458 | if (!IsLambda) | ||||||
14459 | S.PopExpressionEvaluationContext(); | ||||||
14460 | } | ||||||
14461 | |||||||
14462 | private: | ||||||
14463 | Sema &S; | ||||||
14464 | bool IsLambda = false; | ||||||
14465 | }; | ||||||
14466 | |||||||
14467 | static void diagnoseImplicitlyRetainedSelf(Sema &S) { | ||||||
14468 | llvm::DenseMap<const BlockDecl *, bool> EscapeInfo; | ||||||
14469 | |||||||
14470 | auto IsOrNestedInEscapingBlock = [&](const BlockDecl *BD) { | ||||||
14471 | if (EscapeInfo.count(BD)) | ||||||
14472 | return EscapeInfo[BD]; | ||||||
14473 | |||||||
14474 | bool R = false; | ||||||
14475 | const BlockDecl *CurBD = BD; | ||||||
14476 | |||||||
14477 | do { | ||||||
14478 | R = !CurBD->doesNotEscape(); | ||||||
14479 | if (R) | ||||||
14480 | break; | ||||||
14481 | CurBD = CurBD->getParent()->getInnermostBlockDecl(); | ||||||
14482 | } while (CurBD); | ||||||
14483 | |||||||
14484 | return EscapeInfo[BD] = R; | ||||||
14485 | }; | ||||||
14486 | |||||||
14487 | // If the location where 'self' is implicitly retained is inside a escaping | ||||||
14488 | // block, emit a diagnostic. | ||||||
14489 | for (const std::pair<SourceLocation, const BlockDecl *> &P : | ||||||
14490 | S.ImplicitlyRetainedSelfLocs) | ||||||
14491 | if (IsOrNestedInEscapingBlock(P.second)) | ||||||
14492 | S.Diag(P.first, diag::warn_implicitly_retains_self) | ||||||
14493 | << FixItHint::CreateInsertion(P.first, "self->"); | ||||||
14494 | } | ||||||
14495 | |||||||
14496 | Decl *Sema::ActOnFinishFunctionBody(Decl *dcl, Stmt *Body, | ||||||
14497 | bool IsInstantiation) { | ||||||
14498 | FunctionScopeInfo *FSI = getCurFunction(); | ||||||
14499 | FunctionDecl *FD = dcl ? dcl->getAsFunction() : nullptr; | ||||||
14500 | |||||||
14501 | if (FSI->UsesFPIntrin && FD && !FD->hasAttr<StrictFPAttr>()) | ||||||
14502 | FD->addAttr(StrictFPAttr::CreateImplicit(Context)); | ||||||
14503 | |||||||
14504 | sema::AnalysisBasedWarnings::Policy WP = AnalysisWarnings.getDefaultPolicy(); | ||||||
14505 | sema::AnalysisBasedWarnings::Policy *ActivePolicy = nullptr; | ||||||
14506 | |||||||
14507 | if (getLangOpts().Coroutines && FSI->isCoroutine()) | ||||||
14508 | CheckCompletedCoroutineBody(FD, Body); | ||||||
14509 | |||||||
14510 | { | ||||||
14511 | // Do not call PopExpressionEvaluationContext() if it is a lambda because | ||||||
14512 | // one is already popped when finishing the lambda in BuildLambdaExpr(). | ||||||
14513 | // This is meant to pop the context added in ActOnStartOfFunctionDef(). | ||||||
14514 | ExitFunctionBodyRAII ExitRAII(*this, isLambdaCallOperator(FD)); | ||||||
14515 | |||||||
14516 | if (FD) { | ||||||
14517 | FD->setBody(Body); | ||||||
14518 | FD->setWillHaveBody(false); | ||||||
14519 | |||||||
14520 | if (getLangOpts().CPlusPlus14) { | ||||||
14521 | if (!FD->isInvalidDecl() && Body && !FD->isDependentContext() && | ||||||
14522 | FD->getReturnType()->isUndeducedType()) { | ||||||
14523 | // If the function has a deduced result type but contains no 'return' | ||||||
14524 | // statements, the result type as written must be exactly 'auto', and | ||||||
14525 | // the deduced result type is 'void'. | ||||||
14526 | if (!FD->getReturnType()->getAs<AutoType>()) { | ||||||
14527 | Diag(dcl->getLocation(), diag::err_auto_fn_no_return_but_not_auto) | ||||||
14528 | << FD->getReturnType(); | ||||||
14529 | FD->setInvalidDecl(); | ||||||
14530 | } else { | ||||||
14531 | // Substitute 'void' for the 'auto' in the type. | ||||||
14532 | TypeLoc ResultType = getReturnTypeLoc(FD); | ||||||
14533 | Context.adjustDeducedFunctionResultType( | ||||||
14534 | FD, SubstAutoType(ResultType.getType(), Context.VoidTy)); | ||||||
14535 | } | ||||||
14536 | } | ||||||
14537 | } else if (getLangOpts().CPlusPlus11 && isLambdaCallOperator(FD)) { | ||||||
14538 | // In C++11, we don't use 'auto' deduction rules for lambda call | ||||||
14539 | // operators because we don't support return type deduction. | ||||||
14540 | auto *LSI = getCurLambda(); | ||||||
14541 | if (LSI->HasImplicitReturnType) { | ||||||
14542 | deduceClosureReturnType(*LSI); | ||||||
14543 | |||||||
14544 | // C++11 [expr.prim.lambda]p4: | ||||||
14545 | // [...] if there are no return statements in the compound-statement | ||||||
14546 | // [the deduced type is] the type void | ||||||
14547 | QualType RetType = | ||||||
14548 | LSI->ReturnType.isNull() ? Context.VoidTy : LSI->ReturnType; | ||||||
14549 | |||||||
14550 | // Update the return type to the deduced type. | ||||||
14551 | const auto *Proto = FD->getType()->castAs<FunctionProtoType>(); | ||||||
14552 | FD->setType(Context.getFunctionType(RetType, Proto->getParamTypes(), | ||||||
14553 | Proto->getExtProtoInfo())); | ||||||
14554 | } | ||||||
14555 | } | ||||||
14556 | |||||||
14557 | // If the function implicitly returns zero (like 'main') or is naked, | ||||||
14558 | // don't complain about missing return statements. | ||||||
14559 | if (FD->hasImplicitReturnZero() || FD->hasAttr<NakedAttr>()) | ||||||
14560 | WP.disableCheckFallThrough(); | ||||||
14561 | |||||||
14562 | // MSVC permits the use of pure specifier (=0) on function definition, | ||||||
14563 | // defined at class scope, warn about this non-standard construct. | ||||||
14564 | if (getLangOpts().MicrosoftExt && FD->isPure() && !FD->isOutOfLine()) | ||||||
14565 | Diag(FD->getLocation(), diag::ext_pure_function_definition); | ||||||
14566 | |||||||
14567 | if (!FD->isInvalidDecl()) { | ||||||
14568 | // Don't diagnose unused parameters of defaulted or deleted functions. | ||||||
14569 | if (!FD->isDeleted() && !FD->isDefaulted() && !FD->hasSkippedBody()) | ||||||
14570 | DiagnoseUnusedParameters(FD->parameters()); | ||||||
14571 | DiagnoseSizeOfParametersAndReturnValue(FD->parameters(), | ||||||
14572 | FD->getReturnType(), FD); | ||||||
14573 | |||||||
14574 | // If this is a structor, we need a vtable. | ||||||
14575 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(FD)) | ||||||
14576 | MarkVTableUsed(FD->getLocation(), Constructor->getParent()); | ||||||
14577 | else if (CXXDestructorDecl *Destructor = | ||||||
14578 | dyn_cast<CXXDestructorDecl>(FD)) | ||||||
14579 | MarkVTableUsed(FD->getLocation(), Destructor->getParent()); | ||||||
14580 | |||||||
14581 | // Try to apply the named return value optimization. We have to check | ||||||
14582 | // if we can do this here because lambdas keep return statements around | ||||||
14583 | // to deduce an implicit return type. | ||||||
14584 | if (FD->getReturnType()->isRecordType() && | ||||||
14585 | (!getLangOpts().CPlusPlus || !FD->isDependentContext())) | ||||||
14586 | computeNRVO(Body, FSI); | ||||||
14587 | } | ||||||
14588 | |||||||
14589 | // GNU warning -Wmissing-prototypes: | ||||||
14590 | // Warn if a global function is defined without a previous | ||||||
14591 | // prototype declaration. This warning is issued even if the | ||||||
14592 | // definition itself provides a prototype. The aim is to detect | ||||||
14593 | // global functions that fail to be declared in header files. | ||||||
14594 | const FunctionDecl *PossiblePrototype = nullptr; | ||||||
14595 | if (ShouldWarnAboutMissingPrototype(FD, PossiblePrototype)) { | ||||||
14596 | Diag(FD->getLocation(), diag::warn_missing_prototype) << FD; | ||||||
14597 | |||||||
14598 | if (PossiblePrototype) { | ||||||
14599 | // We found a declaration that is not a prototype, | ||||||
14600 | // but that could be a zero-parameter prototype | ||||||
14601 | if (TypeSourceInfo *TI = PossiblePrototype->getTypeSourceInfo()) { | ||||||
14602 | TypeLoc TL = TI->getTypeLoc(); | ||||||
14603 | if (FunctionNoProtoTypeLoc FTL = TL.getAs<FunctionNoProtoTypeLoc>()) | ||||||
14604 | Diag(PossiblePrototype->getLocation(), | ||||||
14605 | diag::note_declaration_not_a_prototype) | ||||||
14606 | << (FD->getNumParams() != 0) | ||||||
14607 | << (FD->getNumParams() == 0 ? FixItHint::CreateInsertion( | ||||||
14608 | FTL.getRParenLoc(), "void") | ||||||
14609 | : FixItHint{}); | ||||||
14610 | } | ||||||
14611 | } else { | ||||||
14612 | // Returns true if the token beginning at this Loc is `const`. | ||||||
14613 | auto isLocAtConst = [&](SourceLocation Loc, const SourceManager &SM, | ||||||
14614 | const LangOptions &LangOpts) { | ||||||
14615 | std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc); | ||||||
14616 | if (LocInfo.first.isInvalid()) | ||||||
14617 | return false; | ||||||
14618 | |||||||
14619 | bool Invalid = false; | ||||||
14620 | StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid); | ||||||
14621 | if (Invalid) | ||||||
14622 | return false; | ||||||
14623 | |||||||
14624 | if (LocInfo.second > Buffer.size()) | ||||||
14625 | return false; | ||||||
14626 | |||||||
14627 | const char *LexStart = Buffer.data() + LocInfo.second; | ||||||
14628 | StringRef StartTok(LexStart, Buffer.size() - LocInfo.second); | ||||||
14629 | |||||||
14630 | return StartTok.consume_front("const") && | ||||||
14631 | (StartTok.empty() || isWhitespace(StartTok[0]) || | ||||||
14632 | StartTok.startswith("/*") || StartTok.startswith("//")); | ||||||
14633 | }; | ||||||
14634 | |||||||
14635 | auto findBeginLoc = [&]() { | ||||||
14636 | // If the return type has `const` qualifier, we want to insert | ||||||
14637 | // `static` before `const` (and not before the typename). | ||||||
14638 | if ((FD->getReturnType()->isAnyPointerType() && | ||||||
14639 | FD->getReturnType()->getPointeeType().isConstQualified()) || | ||||||
14640 | FD->getReturnType().isConstQualified()) { | ||||||
14641 | // But only do this if we can determine where the `const` is. | ||||||
14642 | |||||||
14643 | if (isLocAtConst(FD->getBeginLoc(), getSourceManager(), | ||||||
14644 | getLangOpts())) | ||||||
14645 | |||||||
14646 | return FD->getBeginLoc(); | ||||||
14647 | } | ||||||
14648 | return FD->getTypeSpecStartLoc(); | ||||||
14649 | }; | ||||||
14650 | Diag(FD->getTypeSpecStartLoc(), | ||||||
14651 | diag::note_static_for_internal_linkage) | ||||||
14652 | << /* function */ 1 | ||||||
14653 | << (FD->getStorageClass() == SC_None | ||||||
14654 | ? FixItHint::CreateInsertion(findBeginLoc(), "static ") | ||||||
14655 | : FixItHint{}); | ||||||
14656 | } | ||||||
14657 | |||||||
14658 | // GNU warning -Wstrict-prototypes | ||||||
14659 | // Warn if K&R function is defined without a previous declaration. | ||||||
14660 | // This warning is issued only if the definition itself does not | ||||||
14661 | // provide a prototype. Only K&R definitions do not provide a | ||||||
14662 | // prototype. | ||||||
14663 | if (!FD->hasWrittenPrototype()) { | ||||||
14664 | TypeSourceInfo *TI = FD->getTypeSourceInfo(); | ||||||
14665 | TypeLoc TL = TI->getTypeLoc(); | ||||||
14666 | FunctionTypeLoc FTL = TL.getAsAdjusted<FunctionTypeLoc>(); | ||||||
14667 | Diag(FTL.getLParenLoc(), diag::warn_strict_prototypes) << 2; | ||||||
14668 | } | ||||||
14669 | } | ||||||
14670 | |||||||
14671 | // Warn on CPUDispatch with an actual body. | ||||||
14672 | if (FD->isMultiVersion() && FD->hasAttr<CPUDispatchAttr>() && Body) | ||||||
14673 | if (const auto *CmpndBody = dyn_cast<CompoundStmt>(Body)) | ||||||
14674 | if (!CmpndBody->body_empty()) | ||||||
14675 | Diag(CmpndBody->body_front()->getBeginLoc(), | ||||||
14676 | diag::warn_dispatch_body_ignored); | ||||||
14677 | |||||||
14678 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||
14679 | const CXXMethodDecl *KeyFunction; | ||||||
14680 | if (MD->isOutOfLine() && (MD = MD->getCanonicalDecl()) && | ||||||
14681 | MD->isVirtual() && | ||||||
14682 | (KeyFunction = Context.getCurrentKeyFunction(MD->getParent())) && | ||||||
14683 | MD == KeyFunction->getCanonicalDecl()) { | ||||||
14684 | // Update the key-function state if necessary for this ABI. | ||||||
14685 | if (FD->isInlined() && | ||||||
14686 | !Context.getTargetInfo().getCXXABI().canKeyFunctionBeInline()) { | ||||||
14687 | Context.setNonKeyFunction(MD); | ||||||
14688 | |||||||
14689 | // If the newly-chosen key function is already defined, then we | ||||||
14690 | // need to mark the vtable as used retroactively. | ||||||
14691 | KeyFunction = Context.getCurrentKeyFunction(MD->getParent()); | ||||||
14692 | const FunctionDecl *Definition; | ||||||
14693 | if (KeyFunction && KeyFunction->isDefined(Definition)) | ||||||
14694 | MarkVTableUsed(Definition->getLocation(), MD->getParent(), true); | ||||||
14695 | } else { | ||||||
14696 | // We just defined they key function; mark the vtable as used. | ||||||
14697 | MarkVTableUsed(FD->getLocation(), MD->getParent(), true); | ||||||
14698 | } | ||||||
14699 | } | ||||||
14700 | } | ||||||
14701 | |||||||
14702 | assert((static_cast <bool> ((FD == getCurFunctionDecl() || getCurLambda ()->CallOperator == FD) && "Function parsing confused" ) ? void (0) : __assert_fail ("(FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14704, __extension__ __PRETTY_FUNCTION__)) | ||||||
14703 | (FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) &&(static_cast <bool> ((FD == getCurFunctionDecl() || getCurLambda ()->CallOperator == FD) && "Function parsing confused" ) ? void (0) : __assert_fail ("(FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14704, __extension__ __PRETTY_FUNCTION__)) | ||||||
14704 | "Function parsing confused")(static_cast <bool> ((FD == getCurFunctionDecl() || getCurLambda ()->CallOperator == FD) && "Function parsing confused" ) ? void (0) : __assert_fail ("(FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14704, __extension__ __PRETTY_FUNCTION__)); | ||||||
14705 | } else if (ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(dcl)) { | ||||||
14706 | assert(MD == getCurMethodDecl() && "Method parsing confused")(static_cast <bool> (MD == getCurMethodDecl() && "Method parsing confused") ? void (0) : __assert_fail ("MD == getCurMethodDecl() && \"Method parsing confused\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14706, __extension__ __PRETTY_FUNCTION__)); | ||||||
14707 | MD->setBody(Body); | ||||||
14708 | if (!MD->isInvalidDecl()) { | ||||||
14709 | DiagnoseSizeOfParametersAndReturnValue(MD->parameters(), | ||||||
14710 | MD->getReturnType(), MD); | ||||||
14711 | |||||||
14712 | if (Body) | ||||||
14713 | computeNRVO(Body, FSI); | ||||||
14714 | } | ||||||
14715 | if (FSI->ObjCShouldCallSuper) { | ||||||
14716 | Diag(MD->getEndLoc(), diag::warn_objc_missing_super_call) | ||||||
14717 | << MD->getSelector().getAsString(); | ||||||
14718 | FSI->ObjCShouldCallSuper = false; | ||||||
14719 | } | ||||||
14720 | if (FSI->ObjCWarnForNoDesignatedInitChain) { | ||||||
14721 | const ObjCMethodDecl *InitMethod = nullptr; | ||||||
14722 | bool isDesignated = | ||||||
14723 | MD->isDesignatedInitializerForTheInterface(&InitMethod); | ||||||
14724 | assert(isDesignated && InitMethod)(static_cast <bool> (isDesignated && InitMethod ) ? void (0) : __assert_fail ("isDesignated && InitMethod" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14724, __extension__ __PRETTY_FUNCTION__)); | ||||||
14725 | (void)isDesignated; | ||||||
14726 | |||||||
14727 | auto superIsNSObject = [&](const ObjCMethodDecl *MD) { | ||||||
14728 | auto IFace = MD->getClassInterface(); | ||||||
14729 | if (!IFace) | ||||||
14730 | return false; | ||||||
14731 | auto SuperD = IFace->getSuperClass(); | ||||||
14732 | if (!SuperD) | ||||||
14733 | return false; | ||||||
14734 | return SuperD->getIdentifier() == | ||||||
14735 | NSAPIObj->getNSClassId(NSAPI::ClassId_NSObject); | ||||||
14736 | }; | ||||||
14737 | // Don't issue this warning for unavailable inits or direct subclasses | ||||||
14738 | // of NSObject. | ||||||
14739 | if (!MD->isUnavailable() && !superIsNSObject(MD)) { | ||||||
14740 | Diag(MD->getLocation(), | ||||||
14741 | diag::warn_objc_designated_init_missing_super_call); | ||||||
14742 | Diag(InitMethod->getLocation(), | ||||||
14743 | diag::note_objc_designated_init_marked_here); | ||||||
14744 | } | ||||||
14745 | FSI->ObjCWarnForNoDesignatedInitChain = false; | ||||||
14746 | } | ||||||
14747 | if (FSI->ObjCWarnForNoInitDelegation) { | ||||||
14748 | // Don't issue this warning for unavaialable inits. | ||||||
14749 | if (!MD->isUnavailable()) | ||||||
14750 | Diag(MD->getLocation(), | ||||||
14751 | diag::warn_objc_secondary_init_missing_init_call); | ||||||
14752 | FSI->ObjCWarnForNoInitDelegation = false; | ||||||
14753 | } | ||||||
14754 | |||||||
14755 | diagnoseImplicitlyRetainedSelf(*this); | ||||||
14756 | } else { | ||||||
14757 | // Parsing the function declaration failed in some way. Pop the fake scope | ||||||
14758 | // we pushed on. | ||||||
14759 | PopFunctionScopeInfo(ActivePolicy, dcl); | ||||||
14760 | return nullptr; | ||||||
14761 | } | ||||||
14762 | |||||||
14763 | if (Body && FSI->HasPotentialAvailabilityViolations) | ||||||
14764 | DiagnoseUnguardedAvailabilityViolations(dcl); | ||||||
14765 | |||||||
14766 | assert(!FSI->ObjCShouldCallSuper &&(static_cast <bool> (!FSI->ObjCShouldCallSuper && "This should only be set for ObjC methods, which should have been " "handled in the block above.") ? void (0) : __assert_fail ("!FSI->ObjCShouldCallSuper && \"This should only be set for ObjC methods, which should have been \" \"handled in the block above.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14768, __extension__ __PRETTY_FUNCTION__)) | ||||||
14767 | "This should only be set for ObjC methods, which should have been "(static_cast <bool> (!FSI->ObjCShouldCallSuper && "This should only be set for ObjC methods, which should have been " "handled in the block above.") ? void (0) : __assert_fail ("!FSI->ObjCShouldCallSuper && \"This should only be set for ObjC methods, which should have been \" \"handled in the block above.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14768, __extension__ __PRETTY_FUNCTION__)) | ||||||
14768 | "handled in the block above.")(static_cast <bool> (!FSI->ObjCShouldCallSuper && "This should only be set for ObjC methods, which should have been " "handled in the block above.") ? void (0) : __assert_fail ("!FSI->ObjCShouldCallSuper && \"This should only be set for ObjC methods, which should have been \" \"handled in the block above.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14768, __extension__ __PRETTY_FUNCTION__)); | ||||||
14769 | |||||||
14770 | // Verify and clean out per-function state. | ||||||
14771 | if (Body && (!FD || !FD->isDefaulted())) { | ||||||
14772 | // C++ constructors that have function-try-blocks can't have return | ||||||
14773 | // statements in the handlers of that block. (C++ [except.handle]p14) | ||||||
14774 | // Verify this. | ||||||
14775 | if (FD && isa<CXXConstructorDecl>(FD) && isa<CXXTryStmt>(Body)) | ||||||
14776 | DiagnoseReturnInConstructorExceptionHandler(cast<CXXTryStmt>(Body)); | ||||||
14777 | |||||||
14778 | // Verify that gotos and switch cases don't jump into scopes illegally. | ||||||
14779 | if (FSI->NeedsScopeChecking() && !PP.isCodeCompletionEnabled()) | ||||||
14780 | DiagnoseInvalidJumps(Body); | ||||||
14781 | |||||||
14782 | if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(dcl)) { | ||||||
14783 | if (!Destructor->getParent()->isDependentType()) | ||||||
14784 | CheckDestructor(Destructor); | ||||||
14785 | |||||||
14786 | MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(), | ||||||
14787 | Destructor->getParent()); | ||||||
14788 | } | ||||||
14789 | |||||||
14790 | // If any errors have occurred, clear out any temporaries that may have | ||||||
14791 | // been leftover. This ensures that these temporaries won't be picked up | ||||||
14792 | // for deletion in some later function. | ||||||
14793 | if (hasUncompilableErrorOccurred() || | ||||||
14794 | getDiagnostics().getSuppressAllDiagnostics()) { | ||||||
14795 | DiscardCleanupsInEvaluationContext(); | ||||||
14796 | } | ||||||
14797 | if (!hasUncompilableErrorOccurred() && !isa<FunctionTemplateDecl>(dcl)) { | ||||||
14798 | // Since the body is valid, issue any analysis-based warnings that are | ||||||
14799 | // enabled. | ||||||
14800 | ActivePolicy = &WP; | ||||||
14801 | } | ||||||
14802 | |||||||
14803 | if (!IsInstantiation && FD && FD->isConstexpr() && !FD->isInvalidDecl() && | ||||||
14804 | !CheckConstexprFunctionDefinition(FD, CheckConstexprKind::Diagnose)) | ||||||
14805 | FD->setInvalidDecl(); | ||||||
14806 | |||||||
14807 | if (FD && FD->hasAttr<NakedAttr>()) { | ||||||
14808 | for (const Stmt *S : Body->children()) { | ||||||
14809 | // Allow local register variables without initializer as they don't | ||||||
14810 | // require prologue. | ||||||
14811 | bool RegisterVariables = false; | ||||||
14812 | if (auto *DS = dyn_cast<DeclStmt>(S)) { | ||||||
14813 | for (const auto *Decl : DS->decls()) { | ||||||
14814 | if (const auto *Var = dyn_cast<VarDecl>(Decl)) { | ||||||
14815 | RegisterVariables = | ||||||
14816 | Var->hasAttr<AsmLabelAttr>() && !Var->hasInit(); | ||||||
14817 | if (!RegisterVariables) | ||||||
14818 | break; | ||||||
14819 | } | ||||||
14820 | } | ||||||
14821 | } | ||||||
14822 | if (RegisterVariables) | ||||||
14823 | continue; | ||||||
14824 | if (!isa<AsmStmt>(S) && !isa<NullStmt>(S)) { | ||||||
14825 | Diag(S->getBeginLoc(), diag::err_non_asm_stmt_in_naked_function); | ||||||
14826 | Diag(FD->getAttr<NakedAttr>()->getLocation(), diag::note_attribute); | ||||||
14827 | FD->setInvalidDecl(); | ||||||
14828 | break; | ||||||
14829 | } | ||||||
14830 | } | ||||||
14831 | } | ||||||
14832 | |||||||
14833 | assert(ExprCleanupObjects.size() ==(static_cast <bool> (ExprCleanupObjects.size() == ExprEvalContexts .back().NumCleanupObjects && "Leftover temporaries in function" ) ? void (0) : __assert_fail ("ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && \"Leftover temporaries in function\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14835, __extension__ __PRETTY_FUNCTION__)) | ||||||
14834 | ExprEvalContexts.back().NumCleanupObjects &&(static_cast <bool> (ExprCleanupObjects.size() == ExprEvalContexts .back().NumCleanupObjects && "Leftover temporaries in function" ) ? void (0) : __assert_fail ("ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && \"Leftover temporaries in function\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14835, __extension__ __PRETTY_FUNCTION__)) | ||||||
14835 | "Leftover temporaries in function")(static_cast <bool> (ExprCleanupObjects.size() == ExprEvalContexts .back().NumCleanupObjects && "Leftover temporaries in function" ) ? void (0) : __assert_fail ("ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && \"Leftover temporaries in function\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14835, __extension__ __PRETTY_FUNCTION__)); | ||||||
14836 | assert(!Cleanup.exprNeedsCleanups() &&(static_cast <bool> (!Cleanup.exprNeedsCleanups() && "Unaccounted cleanups in function") ? void (0) : __assert_fail ("!Cleanup.exprNeedsCleanups() && \"Unaccounted cleanups in function\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14837, __extension__ __PRETTY_FUNCTION__)) | ||||||
14837 | "Unaccounted cleanups in function")(static_cast <bool> (!Cleanup.exprNeedsCleanups() && "Unaccounted cleanups in function") ? void (0) : __assert_fail ("!Cleanup.exprNeedsCleanups() && \"Unaccounted cleanups in function\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14837, __extension__ __PRETTY_FUNCTION__)); | ||||||
14838 | assert(MaybeODRUseExprs.empty() &&(static_cast <bool> (MaybeODRUseExprs.empty() && "Leftover expressions for odr-use checking") ? void (0) : __assert_fail ("MaybeODRUseExprs.empty() && \"Leftover expressions for odr-use checking\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14839, __extension__ __PRETTY_FUNCTION__)) | ||||||
14839 | "Leftover expressions for odr-use checking")(static_cast <bool> (MaybeODRUseExprs.empty() && "Leftover expressions for odr-use checking") ? void (0) : __assert_fail ("MaybeODRUseExprs.empty() && \"Leftover expressions for odr-use checking\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14839, __extension__ __PRETTY_FUNCTION__)); | ||||||
14840 | } | ||||||
14841 | } // Pops the ExitFunctionBodyRAII scope, which needs to happen before we pop | ||||||
14842 | // the declaration context below. Otherwise, we're unable to transform | ||||||
14843 | // 'this' expressions when transforming immediate context functions. | ||||||
14844 | |||||||
14845 | if (!IsInstantiation) | ||||||
14846 | PopDeclContext(); | ||||||
14847 | |||||||
14848 | PopFunctionScopeInfo(ActivePolicy, dcl); | ||||||
14849 | // If any errors have occurred, clear out any temporaries that may have | ||||||
14850 | // been leftover. This ensures that these temporaries won't be picked up for | ||||||
14851 | // deletion in some later function. | ||||||
14852 | if (hasUncompilableErrorOccurred()) { | ||||||
14853 | DiscardCleanupsInEvaluationContext(); | ||||||
14854 | } | ||||||
14855 | |||||||
14856 | if (FD && ((LangOpts.OpenMP && (LangOpts.OpenMPIsDevice || | ||||||
14857 | !LangOpts.OMPTargetTriples.empty())) || | ||||||
14858 | LangOpts.CUDA || LangOpts.SYCLIsDevice)) { | ||||||
14859 | auto ES = getEmissionStatus(FD); | ||||||
14860 | if (ES == Sema::FunctionEmissionStatus::Emitted || | ||||||
14861 | ES == Sema::FunctionEmissionStatus::Unknown) | ||||||
14862 | DeclsToCheckForDeferredDiags.insert(FD); | ||||||
14863 | } | ||||||
14864 | |||||||
14865 | if (FD && !FD->isDeleted()) | ||||||
14866 | checkTypeSupport(FD->getType(), FD->getLocation(), FD); | ||||||
14867 | |||||||
14868 | return dcl; | ||||||
14869 | } | ||||||
14870 | |||||||
14871 | /// When we finish delayed parsing of an attribute, we must attach it to the | ||||||
14872 | /// relevant Decl. | ||||||
14873 | void Sema::ActOnFinishDelayedAttribute(Scope *S, Decl *D, | ||||||
14874 | ParsedAttributes &Attrs) { | ||||||
14875 | // Always attach attributes to the underlying decl. | ||||||
14876 | if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D)) | ||||||
14877 | D = TD->getTemplatedDecl(); | ||||||
14878 | ProcessDeclAttributeList(S, D, Attrs); | ||||||
14879 | |||||||
14880 | if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(D)) | ||||||
14881 | if (Method->isStatic()) | ||||||
14882 | checkThisInStaticMemberFunctionAttributes(Method); | ||||||
14883 | } | ||||||
14884 | |||||||
14885 | /// ImplicitlyDefineFunction - An undeclared identifier was used in a function | ||||||
14886 | /// call, forming a call to an implicitly defined function (per C99 6.5.1p2). | ||||||
14887 | NamedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc, | ||||||
14888 | IdentifierInfo &II, Scope *S) { | ||||||
14889 | // Find the scope in which the identifier is injected and the corresponding | ||||||
14890 | // DeclContext. | ||||||
14891 | // FIXME: C89 does not say what happens if there is no enclosing block scope. | ||||||
14892 | // In that case, we inject the declaration into the translation unit scope | ||||||
14893 | // instead. | ||||||
14894 | Scope *BlockScope = S; | ||||||
14895 | while (!BlockScope->isCompoundStmtScope() && BlockScope->getParent()) | ||||||
14896 | BlockScope = BlockScope->getParent(); | ||||||
14897 | |||||||
14898 | Scope *ContextScope = BlockScope; | ||||||
14899 | while (!ContextScope->getEntity()) | ||||||
14900 | ContextScope = ContextScope->getParent(); | ||||||
14901 | ContextRAII SavedContext(*this, ContextScope->getEntity()); | ||||||
14902 | |||||||
14903 | // Before we produce a declaration for an implicitly defined | ||||||
14904 | // function, see whether there was a locally-scoped declaration of | ||||||
14905 | // this name as a function or variable. If so, use that | ||||||
14906 | // (non-visible) declaration, and complain about it. | ||||||
14907 | NamedDecl *ExternCPrev = findLocallyScopedExternCDecl(&II); | ||||||
14908 | if (ExternCPrev) { | ||||||
14909 | // We still need to inject the function into the enclosing block scope so | ||||||
14910 | // that later (non-call) uses can see it. | ||||||
14911 | PushOnScopeChains(ExternCPrev, BlockScope, /*AddToContext*/false); | ||||||
14912 | |||||||
14913 | // C89 footnote 38: | ||||||
14914 | // If in fact it is not defined as having type "function returning int", | ||||||
14915 | // the behavior is undefined. | ||||||
14916 | if (!isa<FunctionDecl>(ExternCPrev) || | ||||||
14917 | !Context.typesAreCompatible( | ||||||
14918 | cast<FunctionDecl>(ExternCPrev)->getType(), | ||||||
14919 | Context.getFunctionNoProtoType(Context.IntTy))) { | ||||||
14920 | Diag(Loc, diag::ext_use_out_of_scope_declaration) | ||||||
14921 | << ExternCPrev << !getLangOpts().C99; | ||||||
14922 | Diag(ExternCPrev->getLocation(), diag::note_previous_declaration); | ||||||
14923 | return ExternCPrev; | ||||||
14924 | } | ||||||
14925 | } | ||||||
14926 | |||||||
14927 | // Extension in C99. Legal in C90, but warn about it. | ||||||
14928 | unsigned diag_id; | ||||||
14929 | if (II.getName().startswith("__builtin_")) | ||||||
14930 | diag_id = diag::warn_builtin_unknown; | ||||||
14931 | // OpenCL v2.0 s6.9.u - Implicit function declaration is not supported. | ||||||
14932 | else if (getLangOpts().OpenCL) | ||||||
14933 | diag_id = diag::err_opencl_implicit_function_decl; | ||||||
14934 | else if (getLangOpts().C99) | ||||||
14935 | diag_id = diag::ext_implicit_function_decl; | ||||||
14936 | else | ||||||
14937 | diag_id = diag::warn_implicit_function_decl; | ||||||
14938 | Diag(Loc, diag_id) << &II; | ||||||
14939 | |||||||
14940 | // If we found a prior declaration of this function, don't bother building | ||||||
14941 | // another one. We've already pushed that one into scope, so there's nothing | ||||||
14942 | // more to do. | ||||||
14943 | if (ExternCPrev) | ||||||
14944 | return ExternCPrev; | ||||||
14945 | |||||||
14946 | // Because typo correction is expensive, only do it if the implicit | ||||||
14947 | // function declaration is going to be treated as an error. | ||||||
14948 | if (Diags.getDiagnosticLevel(diag_id, Loc) >= DiagnosticsEngine::Error) { | ||||||
14949 | TypoCorrection Corrected; | ||||||
14950 | DeclFilterCCC<FunctionDecl> CCC{}; | ||||||
14951 | if (S && (Corrected = | ||||||
14952 | CorrectTypo(DeclarationNameInfo(&II, Loc), LookupOrdinaryName, | ||||||
14953 | S, nullptr, CCC, CTK_NonError))) | ||||||
14954 | diagnoseTypo(Corrected, PDiag(diag::note_function_suggestion), | ||||||
14955 | /*ErrorRecovery*/false); | ||||||
14956 | } | ||||||
14957 | |||||||
14958 | // Set a Declarator for the implicit definition: int foo(); | ||||||
14959 | const char *Dummy; | ||||||
14960 | AttributeFactory attrFactory; | ||||||
14961 | DeclSpec DS(attrFactory); | ||||||
14962 | unsigned DiagID; | ||||||
14963 | bool Error = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, Dummy, DiagID, | ||||||
14964 | Context.getPrintingPolicy()); | ||||||
14965 | (void)Error; // Silence warning. | ||||||
14966 | assert(!Error && "Error setting up implicit decl!")(static_cast <bool> (!Error && "Error setting up implicit decl!" ) ? void (0) : __assert_fail ("!Error && \"Error setting up implicit decl!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 14966, __extension__ __PRETTY_FUNCTION__)); | ||||||
14967 | SourceLocation NoLoc; | ||||||
14968 | Declarator D(DS, DeclaratorContext::Block); | ||||||
14969 | D.AddTypeInfo(DeclaratorChunk::getFunction(/*HasProto=*/false, | ||||||
14970 | /*IsAmbiguous=*/false, | ||||||
14971 | /*LParenLoc=*/NoLoc, | ||||||
14972 | /*Params=*/nullptr, | ||||||
14973 | /*NumParams=*/0, | ||||||
14974 | /*EllipsisLoc=*/NoLoc, | ||||||
14975 | /*RParenLoc=*/NoLoc, | ||||||
14976 | /*RefQualifierIsLvalueRef=*/true, | ||||||
14977 | /*RefQualifierLoc=*/NoLoc, | ||||||
14978 | /*MutableLoc=*/NoLoc, EST_None, | ||||||
14979 | /*ESpecRange=*/SourceRange(), | ||||||
14980 | /*Exceptions=*/nullptr, | ||||||
14981 | /*ExceptionRanges=*/nullptr, | ||||||
14982 | /*NumExceptions=*/0, | ||||||
14983 | /*NoexceptExpr=*/nullptr, | ||||||
14984 | /*ExceptionSpecTokens=*/nullptr, | ||||||
14985 | /*DeclsInPrototype=*/None, Loc, | ||||||
14986 | Loc, D), | ||||||
14987 | std::move(DS.getAttributes()), SourceLocation()); | ||||||
14988 | D.SetIdentifier(&II, Loc); | ||||||
14989 | |||||||
14990 | // Insert this function into the enclosing block scope. | ||||||
14991 | FunctionDecl *FD = cast<FunctionDecl>(ActOnDeclarator(BlockScope, D)); | ||||||
14992 | FD->setImplicit(); | ||||||
14993 | |||||||
14994 | AddKnownFunctionAttributes(FD); | ||||||
14995 | |||||||
14996 | return FD; | ||||||
14997 | } | ||||||
14998 | |||||||
14999 | /// If this function is a C++ replaceable global allocation function | ||||||
15000 | /// (C++2a [basic.stc.dynamic.allocation], C++2a [new.delete]), | ||||||
15001 | /// adds any function attributes that we know a priori based on the standard. | ||||||
15002 | /// | ||||||
15003 | /// We need to check for duplicate attributes both here and where user-written | ||||||
15004 | /// attributes are applied to declarations. | ||||||
15005 | void Sema::AddKnownFunctionAttributesForReplaceableGlobalAllocationFunction( | ||||||
15006 | FunctionDecl *FD) { | ||||||
15007 | if (FD->isInvalidDecl()) | ||||||
15008 | return; | ||||||
15009 | |||||||
15010 | if (FD->getDeclName().getCXXOverloadedOperator() != OO_New && | ||||||
15011 | FD->getDeclName().getCXXOverloadedOperator() != OO_Array_New) | ||||||
15012 | return; | ||||||
15013 | |||||||
15014 | Optional<unsigned> AlignmentParam; | ||||||
15015 | bool IsNothrow = false; | ||||||
15016 | if (!FD->isReplaceableGlobalAllocationFunction(&AlignmentParam, &IsNothrow)) | ||||||
15017 | return; | ||||||
15018 | |||||||
15019 | // C++2a [basic.stc.dynamic.allocation]p4: | ||||||
15020 | // An allocation function that has a non-throwing exception specification | ||||||
15021 | // indicates failure by returning a null pointer value. Any other allocation | ||||||
15022 | // function never returns a null pointer value and indicates failure only by | ||||||
15023 | // throwing an exception [...] | ||||||
15024 | if (!IsNothrow && !FD->hasAttr<ReturnsNonNullAttr>()) | ||||||
15025 | FD->addAttr(ReturnsNonNullAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15026 | |||||||
15027 | // C++2a [basic.stc.dynamic.allocation]p2: | ||||||
15028 | // An allocation function attempts to allocate the requested amount of | ||||||
15029 | // storage. [...] If the request succeeds, the value returned by a | ||||||
15030 | // replaceable allocation function is a [...] pointer value p0 different | ||||||
15031 | // from any previously returned value p1 [...] | ||||||
15032 | // | ||||||
15033 | // However, this particular information is being added in codegen, | ||||||
15034 | // because there is an opt-out switch for it (-fno-assume-sane-operator-new) | ||||||
15035 | |||||||
15036 | // C++2a [basic.stc.dynamic.allocation]p2: | ||||||
15037 | // An allocation function attempts to allocate the requested amount of | ||||||
15038 | // storage. If it is successful, it returns the address of the start of a | ||||||
15039 | // block of storage whose length in bytes is at least as large as the | ||||||
15040 | // requested size. | ||||||
15041 | if (!FD->hasAttr<AllocSizeAttr>()) { | ||||||
15042 | FD->addAttr(AllocSizeAttr::CreateImplicit( | ||||||
15043 | Context, /*ElemSizeParam=*/ParamIdx(1, FD), | ||||||
15044 | /*NumElemsParam=*/ParamIdx(), FD->getLocation())); | ||||||
15045 | } | ||||||
15046 | |||||||
15047 | // C++2a [basic.stc.dynamic.allocation]p3: | ||||||
15048 | // For an allocation function [...], the pointer returned on a successful | ||||||
15049 | // call shall represent the address of storage that is aligned as follows: | ||||||
15050 | // (3.1) If the allocation function takes an argument of type | ||||||
15051 | // std::align_val_t, the storage will have the alignment | ||||||
15052 | // specified by the value of this argument. | ||||||
15053 | if (AlignmentParam.hasValue() && !FD->hasAttr<AllocAlignAttr>()) { | ||||||
15054 | FD->addAttr(AllocAlignAttr::CreateImplicit( | ||||||
15055 | Context, ParamIdx(AlignmentParam.getValue(), FD), FD->getLocation())); | ||||||
15056 | } | ||||||
15057 | |||||||
15058 | // FIXME: | ||||||
15059 | // C++2a [basic.stc.dynamic.allocation]p3: | ||||||
15060 | // For an allocation function [...], the pointer returned on a successful | ||||||
15061 | // call shall represent the address of storage that is aligned as follows: | ||||||
15062 | // (3.2) Otherwise, if the allocation function is named operator new[], | ||||||
15063 | // the storage is aligned for any object that does not have | ||||||
15064 | // new-extended alignment ([basic.align]) and is no larger than the | ||||||
15065 | // requested size. | ||||||
15066 | // (3.3) Otherwise, the storage is aligned for any object that does not | ||||||
15067 | // have new-extended alignment and is of the requested size. | ||||||
15068 | } | ||||||
15069 | |||||||
15070 | /// Adds any function attributes that we know a priori based on | ||||||
15071 | /// the declaration of this function. | ||||||
15072 | /// | ||||||
15073 | /// These attributes can apply both to implicitly-declared builtins | ||||||
15074 | /// (like __builtin___printf_chk) or to library-declared functions | ||||||
15075 | /// like NSLog or printf. | ||||||
15076 | /// | ||||||
15077 | /// We need to check for duplicate attributes both here and where user-written | ||||||
15078 | /// attributes are applied to declarations. | ||||||
15079 | void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) { | ||||||
15080 | if (FD->isInvalidDecl()) | ||||||
15081 | return; | ||||||
15082 | |||||||
15083 | // If this is a built-in function, map its builtin attributes to | ||||||
15084 | // actual attributes. | ||||||
15085 | if (unsigned BuiltinID = FD->getBuiltinID()) { | ||||||
15086 | // Handle printf-formatting attributes. | ||||||
15087 | unsigned FormatIdx; | ||||||
15088 | bool HasVAListArg; | ||||||
15089 | if (Context.BuiltinInfo.isPrintfLike(BuiltinID, FormatIdx, HasVAListArg)) { | ||||||
15090 | if (!FD->hasAttr<FormatAttr>()) { | ||||||
15091 | const char *fmt = "printf"; | ||||||
15092 | unsigned int NumParams = FD->getNumParams(); | ||||||
15093 | if (FormatIdx < NumParams && // NumParams may be 0 (e.g. vfprintf) | ||||||
15094 | FD->getParamDecl(FormatIdx)->getType()->isObjCObjectPointerType()) | ||||||
15095 | fmt = "NSString"; | ||||||
15096 | FD->addAttr(FormatAttr::CreateImplicit(Context, | ||||||
15097 | &Context.Idents.get(fmt), | ||||||
15098 | FormatIdx+1, | ||||||
15099 | HasVAListArg ? 0 : FormatIdx+2, | ||||||
15100 | FD->getLocation())); | ||||||
15101 | } | ||||||
15102 | } | ||||||
15103 | if (Context.BuiltinInfo.isScanfLike(BuiltinID, FormatIdx, | ||||||
15104 | HasVAListArg)) { | ||||||
15105 | if (!FD->hasAttr<FormatAttr>()) | ||||||
15106 | FD->addAttr(FormatAttr::CreateImplicit(Context, | ||||||
15107 | &Context.Idents.get("scanf"), | ||||||
15108 | FormatIdx+1, | ||||||
15109 | HasVAListArg ? 0 : FormatIdx+2, | ||||||
15110 | FD->getLocation())); | ||||||
15111 | } | ||||||
15112 | |||||||
15113 | // Handle automatically recognized callbacks. | ||||||
15114 | SmallVector<int, 4> Encoding; | ||||||
15115 | if (!FD->hasAttr<CallbackAttr>() && | ||||||
15116 | Context.BuiltinInfo.performsCallback(BuiltinID, Encoding)) | ||||||
15117 | FD->addAttr(CallbackAttr::CreateImplicit( | ||||||
15118 | Context, Encoding.data(), Encoding.size(), FD->getLocation())); | ||||||
15119 | |||||||
15120 | // Mark const if we don't care about errno and that is the only thing | ||||||
15121 | // preventing the function from being const. This allows IRgen to use LLVM | ||||||
15122 | // intrinsics for such functions. | ||||||
15123 | if (!getLangOpts().MathErrno && !FD->hasAttr<ConstAttr>() && | ||||||
15124 | Context.BuiltinInfo.isConstWithoutErrno(BuiltinID)) | ||||||
15125 | FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15126 | |||||||
15127 | // We make "fma" on some platforms const because we know it does not set | ||||||
15128 | // errno in those environments even though it could set errno based on the | ||||||
15129 | // C standard. | ||||||
15130 | const llvm::Triple &Trip = Context.getTargetInfo().getTriple(); | ||||||
15131 | if ((Trip.isGNUEnvironment() || Trip.isAndroid() || Trip.isOSMSVCRT()) && | ||||||
15132 | !FD->hasAttr<ConstAttr>()) { | ||||||
15133 | switch (BuiltinID) { | ||||||
15134 | case Builtin::BI__builtin_fma: | ||||||
15135 | case Builtin::BI__builtin_fmaf: | ||||||
15136 | case Builtin::BI__builtin_fmal: | ||||||
15137 | case Builtin::BIfma: | ||||||
15138 | case Builtin::BIfmaf: | ||||||
15139 | case Builtin::BIfmal: | ||||||
15140 | FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15141 | break; | ||||||
15142 | default: | ||||||
15143 | break; | ||||||
15144 | } | ||||||
15145 | } | ||||||
15146 | |||||||
15147 | if (Context.BuiltinInfo.isReturnsTwice(BuiltinID) && | ||||||
15148 | !FD->hasAttr<ReturnsTwiceAttr>()) | ||||||
15149 | FD->addAttr(ReturnsTwiceAttr::CreateImplicit(Context, | ||||||
15150 | FD->getLocation())); | ||||||
15151 | if (Context.BuiltinInfo.isNoThrow(BuiltinID) && !FD->hasAttr<NoThrowAttr>()) | ||||||
15152 | FD->addAttr(NoThrowAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15153 | if (Context.BuiltinInfo.isPure(BuiltinID) && !FD->hasAttr<PureAttr>()) | ||||||
15154 | FD->addAttr(PureAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15155 | if (Context.BuiltinInfo.isConst(BuiltinID) && !FD->hasAttr<ConstAttr>()) | ||||||
15156 | FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15157 | if (getLangOpts().CUDA && Context.BuiltinInfo.isTSBuiltin(BuiltinID) && | ||||||
15158 | !FD->hasAttr<CUDADeviceAttr>() && !FD->hasAttr<CUDAHostAttr>()) { | ||||||
15159 | // Add the appropriate attribute, depending on the CUDA compilation mode | ||||||
15160 | // and which target the builtin belongs to. For example, during host | ||||||
15161 | // compilation, aux builtins are __device__, while the rest are __host__. | ||||||
15162 | if (getLangOpts().CUDAIsDevice != | ||||||
15163 | Context.BuiltinInfo.isAuxBuiltinID(BuiltinID)) | ||||||
15164 | FD->addAttr(CUDADeviceAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15165 | else | ||||||
15166 | FD->addAttr(CUDAHostAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15167 | } | ||||||
15168 | |||||||
15169 | // Add known guaranteed alignment for allocation functions. | ||||||
15170 | switch (BuiltinID) { | ||||||
15171 | case Builtin::BIaligned_alloc: | ||||||
15172 | if (!FD->hasAttr<AllocAlignAttr>()) | ||||||
15173 | FD->addAttr(AllocAlignAttr::CreateImplicit(Context, ParamIdx(1, FD), | ||||||
15174 | FD->getLocation())); | ||||||
15175 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
15176 | case Builtin::BIcalloc: | ||||||
15177 | case Builtin::BImalloc: | ||||||
15178 | case Builtin::BImemalign: | ||||||
15179 | case Builtin::BIrealloc: | ||||||
15180 | case Builtin::BIstrdup: | ||||||
15181 | case Builtin::BIstrndup: { | ||||||
15182 | if (!FD->hasAttr<AssumeAlignedAttr>()) { | ||||||
15183 | unsigned NewAlign = Context.getTargetInfo().getNewAlign() / | ||||||
15184 | Context.getTargetInfo().getCharWidth(); | ||||||
15185 | IntegerLiteral *Alignment = IntegerLiteral::Create( | ||||||
15186 | Context, Context.MakeIntValue(NewAlign, Context.UnsignedIntTy), | ||||||
15187 | Context.UnsignedIntTy, FD->getLocation()); | ||||||
15188 | FD->addAttr(AssumeAlignedAttr::CreateImplicit( | ||||||
15189 | Context, Alignment, /*Offset=*/nullptr, FD->getLocation())); | ||||||
15190 | } | ||||||
15191 | break; | ||||||
15192 | } | ||||||
15193 | default: | ||||||
15194 | break; | ||||||
15195 | } | ||||||
15196 | } | ||||||
15197 | |||||||
15198 | AddKnownFunctionAttributesForReplaceableGlobalAllocationFunction(FD); | ||||||
15199 | |||||||
15200 | // If C++ exceptions are enabled but we are told extern "C" functions cannot | ||||||
15201 | // throw, add an implicit nothrow attribute to any extern "C" function we come | ||||||
15202 | // across. | ||||||
15203 | if (getLangOpts().CXXExceptions && getLangOpts().ExternCNoUnwind && | ||||||
15204 | FD->isExternC() && !FD->hasAttr<NoThrowAttr>()) { | ||||||
15205 | const auto *FPT = FD->getType()->getAs<FunctionProtoType>(); | ||||||
15206 | if (!FPT || FPT->getExceptionSpecType() == EST_None) | ||||||
15207 | FD->addAttr(NoThrowAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15208 | } | ||||||
15209 | |||||||
15210 | IdentifierInfo *Name = FD->getIdentifier(); | ||||||
15211 | if (!Name) | ||||||
15212 | return; | ||||||
15213 | if ((!getLangOpts().CPlusPlus && | ||||||
15214 | FD->getDeclContext()->isTranslationUnit()) || | ||||||
15215 | (isa<LinkageSpecDecl>(FD->getDeclContext()) && | ||||||
15216 | cast<LinkageSpecDecl>(FD->getDeclContext())->getLanguage() == | ||||||
15217 | LinkageSpecDecl::lang_c)) { | ||||||
15218 | // Okay: this could be a libc/libm/Objective-C function we know | ||||||
15219 | // about. | ||||||
15220 | } else | ||||||
15221 | return; | ||||||
15222 | |||||||
15223 | if (Name->isStr("asprintf") || Name->isStr("vasprintf")) { | ||||||
15224 | // FIXME: asprintf and vasprintf aren't C99 functions. Should they be | ||||||
15225 | // target-specific builtins, perhaps? | ||||||
15226 | if (!FD->hasAttr<FormatAttr>()) | ||||||
15227 | FD->addAttr(FormatAttr::CreateImplicit(Context, | ||||||
15228 | &Context.Idents.get("printf"), 2, | ||||||
15229 | Name->isStr("vasprintf") ? 0 : 3, | ||||||
15230 | FD->getLocation())); | ||||||
15231 | } | ||||||
15232 | |||||||
15233 | if (Name->isStr("__CFStringMakeConstantString")) { | ||||||
15234 | // We already have a __builtin___CFStringMakeConstantString, | ||||||
15235 | // but builds that use -fno-constant-cfstrings don't go through that. | ||||||
15236 | if (!FD->hasAttr<FormatArgAttr>()) | ||||||
15237 | FD->addAttr(FormatArgAttr::CreateImplicit(Context, ParamIdx(1, FD), | ||||||
15238 | FD->getLocation())); | ||||||
15239 | } | ||||||
15240 | } | ||||||
15241 | |||||||
15242 | TypedefDecl *Sema::ParseTypedefDecl(Scope *S, Declarator &D, QualType T, | ||||||
15243 | TypeSourceInfo *TInfo) { | ||||||
15244 | assert(D.getIdentifier() && "Wrong callback for declspec without declarator")(static_cast <bool> (D.getIdentifier() && "Wrong callback for declspec without declarator" ) ? void (0) : __assert_fail ("D.getIdentifier() && \"Wrong callback for declspec without declarator\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15244, __extension__ __PRETTY_FUNCTION__)); | ||||||
15245 | assert(!T.isNull() && "GetTypeForDeclarator() returned null type")(static_cast <bool> (!T.isNull() && "GetTypeForDeclarator() returned null type" ) ? void (0) : __assert_fail ("!T.isNull() && \"GetTypeForDeclarator() returned null type\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15245, __extension__ __PRETTY_FUNCTION__)); | ||||||
15246 | |||||||
15247 | if (!TInfo) { | ||||||
15248 | assert(D.isInvalidType() && "no declarator info for valid type")(static_cast <bool> (D.isInvalidType() && "no declarator info for valid type" ) ? void (0) : __assert_fail ("D.isInvalidType() && \"no declarator info for valid type\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15248, __extension__ __PRETTY_FUNCTION__)); | ||||||
15249 | TInfo = Context.getTrivialTypeSourceInfo(T); | ||||||
15250 | } | ||||||
15251 | |||||||
15252 | // Scope manipulation handled by caller. | ||||||
15253 | TypedefDecl *NewTD = | ||||||
15254 | TypedefDecl::Create(Context, CurContext, D.getBeginLoc(), | ||||||
15255 | D.getIdentifierLoc(), D.getIdentifier(), TInfo); | ||||||
15256 | |||||||
15257 | // Bail out immediately if we have an invalid declaration. | ||||||
15258 | if (D.isInvalidType()) { | ||||||
15259 | NewTD->setInvalidDecl(); | ||||||
15260 | return NewTD; | ||||||
15261 | } | ||||||
15262 | |||||||
15263 | if (D.getDeclSpec().isModulePrivateSpecified()) { | ||||||
15264 | if (CurContext->isFunctionOrMethod()) | ||||||
15265 | Diag(NewTD->getLocation(), diag::err_module_private_local) | ||||||
15266 | << 2 << NewTD | ||||||
15267 | << SourceRange(D.getDeclSpec().getModulePrivateSpecLoc()) | ||||||
15268 | << FixItHint::CreateRemoval( | ||||||
15269 | D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
15270 | else | ||||||
15271 | NewTD->setModulePrivate(); | ||||||
15272 | } | ||||||
15273 | |||||||
15274 | // C++ [dcl.typedef]p8: | ||||||
15275 | // If the typedef declaration defines an unnamed class (or | ||||||
15276 | // enum), the first typedef-name declared by the declaration | ||||||
15277 | // to be that class type (or enum type) is used to denote the | ||||||
15278 | // class type (or enum type) for linkage purposes only. | ||||||
15279 | // We need to check whether the type was declared in the declaration. | ||||||
15280 | switch (D.getDeclSpec().getTypeSpecType()) { | ||||||
15281 | case TST_enum: | ||||||
15282 | case TST_struct: | ||||||
15283 | case TST_interface: | ||||||
15284 | case TST_union: | ||||||
15285 | case TST_class: { | ||||||
15286 | TagDecl *tagFromDeclSpec = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); | ||||||
15287 | setTagNameForLinkagePurposes(tagFromDeclSpec, NewTD); | ||||||
15288 | break; | ||||||
15289 | } | ||||||
15290 | |||||||
15291 | default: | ||||||
15292 | break; | ||||||
15293 | } | ||||||
15294 | |||||||
15295 | return NewTD; | ||||||
15296 | } | ||||||
15297 | |||||||
15298 | /// Check that this is a valid underlying type for an enum declaration. | ||||||
15299 | bool Sema::CheckEnumUnderlyingType(TypeSourceInfo *TI) { | ||||||
15300 | SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc(); | ||||||
15301 | QualType T = TI->getType(); | ||||||
15302 | |||||||
15303 | if (T->isDependentType()) | ||||||
15304 | return false; | ||||||
15305 | |||||||
15306 | // This doesn't use 'isIntegralType' despite the error message mentioning | ||||||
15307 | // integral type because isIntegralType would also allow enum types in C. | ||||||
15308 | if (const BuiltinType *BT = T->getAs<BuiltinType>()) | ||||||
15309 | if (BT->isInteger()) | ||||||
15310 | return false; | ||||||
15311 | |||||||
15312 | if (T->isExtIntType()) | ||||||
15313 | return false; | ||||||
15314 | |||||||
15315 | return Diag(UnderlyingLoc, diag::err_enum_invalid_underlying) << T; | ||||||
15316 | } | ||||||
15317 | |||||||
15318 | /// Check whether this is a valid redeclaration of a previous enumeration. | ||||||
15319 | /// \return true if the redeclaration was invalid. | ||||||
15320 | bool Sema::CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped, | ||||||
15321 | QualType EnumUnderlyingTy, bool IsFixed, | ||||||
15322 | const EnumDecl *Prev) { | ||||||
15323 | if (IsScoped != Prev->isScoped()) { | ||||||
15324 | Diag(EnumLoc, diag::err_enum_redeclare_scoped_mismatch) | ||||||
15325 | << Prev->isScoped(); | ||||||
15326 | Diag(Prev->getLocation(), diag::note_previous_declaration); | ||||||
15327 | return true; | ||||||
15328 | } | ||||||
15329 | |||||||
15330 | if (IsFixed && Prev->isFixed()) { | ||||||
15331 | if (!EnumUnderlyingTy->isDependentType() && | ||||||
15332 | !Prev->getIntegerType()->isDependentType() && | ||||||
15333 | !Context.hasSameUnqualifiedType(EnumUnderlyingTy, | ||||||
15334 | Prev->getIntegerType())) { | ||||||
15335 | // TODO: Highlight the underlying type of the redeclaration. | ||||||
15336 | Diag(EnumLoc, diag::err_enum_redeclare_type_mismatch) | ||||||
15337 | << EnumUnderlyingTy << Prev->getIntegerType(); | ||||||
15338 | Diag(Prev->getLocation(), diag::note_previous_declaration) | ||||||
15339 | << Prev->getIntegerTypeRange(); | ||||||
15340 | return true; | ||||||
15341 | } | ||||||
15342 | } else if (IsFixed != Prev->isFixed()) { | ||||||
15343 | Diag(EnumLoc, diag::err_enum_redeclare_fixed_mismatch) | ||||||
15344 | << Prev->isFixed(); | ||||||
15345 | Diag(Prev->getLocation(), diag::note_previous_declaration); | ||||||
15346 | return true; | ||||||
15347 | } | ||||||
15348 | |||||||
15349 | return false; | ||||||
15350 | } | ||||||
15351 | |||||||
15352 | /// Get diagnostic %select index for tag kind for | ||||||
15353 | /// redeclaration diagnostic message. | ||||||
15354 | /// WARNING: Indexes apply to particular diagnostics only! | ||||||
15355 | /// | ||||||
15356 | /// \returns diagnostic %select index. | ||||||
15357 | static unsigned getRedeclDiagFromTagKind(TagTypeKind Tag) { | ||||||
15358 | switch (Tag) { | ||||||
15359 | case TTK_Struct: return 0; | ||||||
15360 | case TTK_Interface: return 1; | ||||||
15361 | case TTK_Class: return 2; | ||||||
15362 | default: llvm_unreachable("Invalid tag kind for redecl diagnostic!")::llvm::llvm_unreachable_internal("Invalid tag kind for redecl diagnostic!" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15362); | ||||||
15363 | } | ||||||
15364 | } | ||||||
15365 | |||||||
15366 | /// Determine if tag kind is a class-key compatible with | ||||||
15367 | /// class for redeclaration (class, struct, or __interface). | ||||||
15368 | /// | ||||||
15369 | /// \returns true iff the tag kind is compatible. | ||||||
15370 | static bool isClassCompatTagKind(TagTypeKind Tag) | ||||||
15371 | { | ||||||
15372 | return Tag == TTK_Struct || Tag == TTK_Class || Tag == TTK_Interface; | ||||||
15373 | } | ||||||
15374 | |||||||
15375 | Sema::NonTagKind Sema::getNonTagTypeDeclKind(const Decl *PrevDecl, | ||||||
15376 | TagTypeKind TTK) { | ||||||
15377 | if (isa<TypedefDecl>(PrevDecl)) | ||||||
15378 | return NTK_Typedef; | ||||||
15379 | else if (isa<TypeAliasDecl>(PrevDecl)) | ||||||
15380 | return NTK_TypeAlias; | ||||||
15381 | else if (isa<ClassTemplateDecl>(PrevDecl)) | ||||||
15382 | return NTK_Template; | ||||||
15383 | else if (isa<TypeAliasTemplateDecl>(PrevDecl)) | ||||||
15384 | return NTK_TypeAliasTemplate; | ||||||
15385 | else if (isa<TemplateTemplateParmDecl>(PrevDecl)) | ||||||
15386 | return NTK_TemplateTemplateArgument; | ||||||
15387 | switch (TTK) { | ||||||
15388 | case TTK_Struct: | ||||||
15389 | case TTK_Interface: | ||||||
15390 | case TTK_Class: | ||||||
15391 | return getLangOpts().CPlusPlus ? NTK_NonClass : NTK_NonStruct; | ||||||
15392 | case TTK_Union: | ||||||
15393 | return NTK_NonUnion; | ||||||
15394 | case TTK_Enum: | ||||||
15395 | return NTK_NonEnum; | ||||||
15396 | } | ||||||
15397 | llvm_unreachable("invalid TTK")::llvm::llvm_unreachable_internal("invalid TTK", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15397); | ||||||
15398 | } | ||||||
15399 | |||||||
15400 | /// Determine whether a tag with a given kind is acceptable | ||||||
15401 | /// as a redeclaration of the given tag declaration. | ||||||
15402 | /// | ||||||
15403 | /// \returns true if the new tag kind is acceptable, false otherwise. | ||||||
15404 | bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous, | ||||||
15405 | TagTypeKind NewTag, bool isDefinition, | ||||||
15406 | SourceLocation NewTagLoc, | ||||||
15407 | const IdentifierInfo *Name) { | ||||||
15408 | // C++ [dcl.type.elab]p3: | ||||||
15409 | // The class-key or enum keyword present in the | ||||||
15410 | // elaborated-type-specifier shall agree in kind with the | ||||||
15411 | // declaration to which the name in the elaborated-type-specifier | ||||||
15412 | // refers. This rule also applies to the form of | ||||||
15413 | // elaborated-type-specifier that declares a class-name or | ||||||
15414 | // friend class since it can be construed as referring to the | ||||||
15415 | // definition of the class. Thus, in any | ||||||
15416 | // elaborated-type-specifier, the enum keyword shall be used to | ||||||
15417 | // refer to an enumeration (7.2), the union class-key shall be | ||||||
15418 | // used to refer to a union (clause 9), and either the class or | ||||||
15419 | // struct class-key shall be used to refer to a class (clause 9) | ||||||
15420 | // declared using the class or struct class-key. | ||||||
15421 | TagTypeKind OldTag = Previous->getTagKind(); | ||||||
15422 | if (OldTag != NewTag && | ||||||
15423 | !(isClassCompatTagKind(OldTag) && isClassCompatTagKind(NewTag))) | ||||||
15424 | return false; | ||||||
15425 | |||||||
15426 | // Tags are compatible, but we might still want to warn on mismatched tags. | ||||||
15427 | // Non-class tags can't be mismatched at this point. | ||||||
15428 | if (!isClassCompatTagKind(NewTag)) | ||||||
15429 | return true; | ||||||
15430 | |||||||
15431 | // Declarations for which -Wmismatched-tags is disabled are entirely ignored | ||||||
15432 | // by our warning analysis. We don't want to warn about mismatches with (eg) | ||||||
15433 | // declarations in system headers that are designed to be specialized, but if | ||||||
15434 | // a user asks us to warn, we should warn if their code contains mismatched | ||||||
15435 | // declarations. | ||||||
15436 | auto IsIgnoredLoc = [&](SourceLocation Loc) { | ||||||
15437 | return getDiagnostics().isIgnored(diag::warn_struct_class_tag_mismatch, | ||||||
15438 | Loc); | ||||||
15439 | }; | ||||||
15440 | if (IsIgnoredLoc(NewTagLoc)) | ||||||
15441 | return true; | ||||||
15442 | |||||||
15443 | auto IsIgnored = [&](const TagDecl *Tag) { | ||||||
15444 | return IsIgnoredLoc(Tag->getLocation()); | ||||||
15445 | }; | ||||||
15446 | while (IsIgnored(Previous)) { | ||||||
15447 | Previous = Previous->getPreviousDecl(); | ||||||
15448 | if (!Previous) | ||||||
15449 | return true; | ||||||
15450 | OldTag = Previous->getTagKind(); | ||||||
15451 | } | ||||||
15452 | |||||||
15453 | bool isTemplate = false; | ||||||
15454 | if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Previous)) | ||||||
15455 | isTemplate = Record->getDescribedClassTemplate(); | ||||||
15456 | |||||||
15457 | if (inTemplateInstantiation()) { | ||||||
15458 | if (OldTag != NewTag) { | ||||||
15459 | // In a template instantiation, do not offer fix-its for tag mismatches | ||||||
15460 | // since they usually mess up the template instead of fixing the problem. | ||||||
15461 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) | ||||||
15462 | << getRedeclDiagFromTagKind(NewTag) << isTemplate << Name | ||||||
15463 | << getRedeclDiagFromTagKind(OldTag); | ||||||
15464 | // FIXME: Note previous location? | ||||||
15465 | } | ||||||
15466 | return true; | ||||||
15467 | } | ||||||
15468 | |||||||
15469 | if (isDefinition) { | ||||||
15470 | // On definitions, check all previous tags and issue a fix-it for each | ||||||
15471 | // one that doesn't match the current tag. | ||||||
15472 | if (Previous->getDefinition()) { | ||||||
15473 | // Don't suggest fix-its for redefinitions. | ||||||
15474 | return true; | ||||||
15475 | } | ||||||
15476 | |||||||
15477 | bool previousMismatch = false; | ||||||
15478 | for (const TagDecl *I : Previous->redecls()) { | ||||||
15479 | if (I->getTagKind() != NewTag) { | ||||||
15480 | // Ignore previous declarations for which the warning was disabled. | ||||||
15481 | if (IsIgnored(I)) | ||||||
15482 | continue; | ||||||
15483 | |||||||
15484 | if (!previousMismatch) { | ||||||
15485 | previousMismatch = true; | ||||||
15486 | Diag(NewTagLoc, diag::warn_struct_class_previous_tag_mismatch) | ||||||
15487 | << getRedeclDiagFromTagKind(NewTag) << isTemplate << Name | ||||||
15488 | << getRedeclDiagFromTagKind(I->getTagKind()); | ||||||
15489 | } | ||||||
15490 | Diag(I->getInnerLocStart(), diag::note_struct_class_suggestion) | ||||||
15491 | << getRedeclDiagFromTagKind(NewTag) | ||||||
15492 | << FixItHint::CreateReplacement(I->getInnerLocStart(), | ||||||
15493 | TypeWithKeyword::getTagTypeKindName(NewTag)); | ||||||
15494 | } | ||||||
15495 | } | ||||||
15496 | return true; | ||||||
15497 | } | ||||||
15498 | |||||||
15499 | // Identify the prevailing tag kind: this is the kind of the definition (if | ||||||
15500 | // there is a non-ignored definition), or otherwise the kind of the prior | ||||||
15501 | // (non-ignored) declaration. | ||||||
15502 | const TagDecl *PrevDef = Previous->getDefinition(); | ||||||
15503 | if (PrevDef && IsIgnored(PrevDef)) | ||||||
15504 | PrevDef = nullptr; | ||||||
15505 | const TagDecl *Redecl = PrevDef ? PrevDef : Previous; | ||||||
15506 | if (Redecl->getTagKind() != NewTag) { | ||||||
15507 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) | ||||||
15508 | << getRedeclDiagFromTagKind(NewTag) << isTemplate << Name | ||||||
15509 | << getRedeclDiagFromTagKind(OldTag); | ||||||
15510 | Diag(Redecl->getLocation(), diag::note_previous_use); | ||||||
15511 | |||||||
15512 | // If there is a previous definition, suggest a fix-it. | ||||||
15513 | if (PrevDef) { | ||||||
15514 | Diag(NewTagLoc, diag::note_struct_class_suggestion) | ||||||
15515 | << getRedeclDiagFromTagKind(Redecl->getTagKind()) | ||||||
15516 | << FixItHint::CreateReplacement(SourceRange(NewTagLoc), | ||||||
15517 | TypeWithKeyword::getTagTypeKindName(Redecl->getTagKind())); | ||||||
15518 | } | ||||||
15519 | } | ||||||
15520 | |||||||
15521 | return true; | ||||||
15522 | } | ||||||
15523 | |||||||
15524 | /// Add a minimal nested name specifier fixit hint to allow lookup of a tag name | ||||||
15525 | /// from an outer enclosing namespace or file scope inside a friend declaration. | ||||||
15526 | /// This should provide the commented out code in the following snippet: | ||||||
15527 | /// namespace N { | ||||||
15528 | /// struct X; | ||||||
15529 | /// namespace M { | ||||||
15530 | /// struct Y { friend struct /*N::*/ X; }; | ||||||
15531 | /// } | ||||||
15532 | /// } | ||||||
15533 | static FixItHint createFriendTagNNSFixIt(Sema &SemaRef, NamedDecl *ND, Scope *S, | ||||||
15534 | SourceLocation NameLoc) { | ||||||
15535 | // While the decl is in a namespace, do repeated lookup of that name and see | ||||||
15536 | // if we get the same namespace back. If we do not, continue until | ||||||
15537 | // translation unit scope, at which point we have a fully qualified NNS. | ||||||
15538 | SmallVector<IdentifierInfo *, 4> Namespaces; | ||||||
15539 | DeclContext *DC = ND->getDeclContext()->getRedeclContext(); | ||||||
15540 | for (; !DC->isTranslationUnit(); DC = DC->getParent()) { | ||||||
15541 | // This tag should be declared in a namespace, which can only be enclosed by | ||||||
15542 | // other namespaces. Bail if there's an anonymous namespace in the chain. | ||||||
15543 | NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(DC); | ||||||
15544 | if (!Namespace || Namespace->isAnonymousNamespace()) | ||||||
15545 | return FixItHint(); | ||||||
15546 | IdentifierInfo *II = Namespace->getIdentifier(); | ||||||
15547 | Namespaces.push_back(II); | ||||||
15548 | NamedDecl *Lookup = SemaRef.LookupSingleName( | ||||||
15549 | S, II, NameLoc, Sema::LookupNestedNameSpecifierName); | ||||||
15550 | if (Lookup == Namespace) | ||||||
15551 | break; | ||||||
15552 | } | ||||||
15553 | |||||||
15554 | // Once we have all the namespaces, reverse them to go outermost first, and | ||||||
15555 | // build an NNS. | ||||||
15556 | SmallString<64> Insertion; | ||||||
15557 | llvm::raw_svector_ostream OS(Insertion); | ||||||
15558 | if (DC->isTranslationUnit()) | ||||||
15559 | OS << "::"; | ||||||
15560 | std::reverse(Namespaces.begin(), Namespaces.end()); | ||||||
15561 | for (auto *II : Namespaces) | ||||||
15562 | OS << II->getName() << "::"; | ||||||
15563 | return FixItHint::CreateInsertion(NameLoc, Insertion); | ||||||
15564 | } | ||||||
15565 | |||||||
15566 | /// Determine whether a tag originally declared in context \p OldDC can | ||||||
15567 | /// be redeclared with an unqualified name in \p NewDC (assuming name lookup | ||||||
15568 | /// found a declaration in \p OldDC as a previous decl, perhaps through a | ||||||
15569 | /// using-declaration). | ||||||
15570 | static bool isAcceptableTagRedeclContext(Sema &S, DeclContext *OldDC, | ||||||
15571 | DeclContext *NewDC) { | ||||||
15572 | OldDC = OldDC->getRedeclContext(); | ||||||
15573 | NewDC = NewDC->getRedeclContext(); | ||||||
15574 | |||||||
15575 | if (OldDC->Equals(NewDC)) | ||||||
15576 | return true; | ||||||
15577 | |||||||
15578 | // In MSVC mode, we allow a redeclaration if the contexts are related (either | ||||||
15579 | // encloses the other). | ||||||
15580 | if (S.getLangOpts().MSVCCompat && | ||||||
15581 | (OldDC->Encloses(NewDC) || NewDC->Encloses(OldDC))) | ||||||
15582 | return true; | ||||||
15583 | |||||||
15584 | return false; | ||||||
15585 | } | ||||||
15586 | |||||||
15587 | /// This is invoked when we see 'struct foo' or 'struct {'. In the | ||||||
15588 | /// former case, Name will be non-null. In the later case, Name will be null. | ||||||
15589 | /// TagSpec indicates what kind of tag this is. TUK indicates whether this is a | ||||||
15590 | /// reference/declaration/definition of a tag. | ||||||
15591 | /// | ||||||
15592 | /// \param IsTypeSpecifier \c true if this is a type-specifier (or | ||||||
15593 | /// trailing-type-specifier) other than one in an alias-declaration. | ||||||
15594 | /// | ||||||
15595 | /// \param SkipBody If non-null, will be set to indicate if the caller should | ||||||
15596 | /// skip the definition of this tag and treat it as if it were a declaration. | ||||||
15597 | Decl *Sema::ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, | ||||||
15598 | SourceLocation KWLoc, CXXScopeSpec &SS, | ||||||
15599 | IdentifierInfo *Name, SourceLocation NameLoc, | ||||||
15600 | const ParsedAttributesView &Attrs, AccessSpecifier AS, | ||||||
15601 | SourceLocation ModulePrivateLoc, | ||||||
15602 | MultiTemplateParamsArg TemplateParameterLists, | ||||||
15603 | bool &OwnedDecl, bool &IsDependent, | ||||||
15604 | SourceLocation ScopedEnumKWLoc, | ||||||
15605 | bool ScopedEnumUsesClassTag, TypeResult UnderlyingType, | ||||||
15606 | bool IsTypeSpecifier, bool IsTemplateParamOrArg, | ||||||
15607 | SkipBodyInfo *SkipBody) { | ||||||
15608 | // If this is not a definition, it must have a name. | ||||||
15609 | IdentifierInfo *OrigName = Name; | ||||||
15610 | assert((Name != nullptr || TUK == TUK_Definition) &&(static_cast <bool> ((Name != nullptr || TUK == TUK_Definition ) && "Nameless record must be a definition!") ? void ( 0) : __assert_fail ("(Name != nullptr || TUK == TUK_Definition) && \"Nameless record must be a definition!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15611, __extension__ __PRETTY_FUNCTION__)) | ||||||
15611 | "Nameless record must be a definition!")(static_cast <bool> ((Name != nullptr || TUK == TUK_Definition ) && "Nameless record must be a definition!") ? void ( 0) : __assert_fail ("(Name != nullptr || TUK == TUK_Definition) && \"Nameless record must be a definition!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15611, __extension__ __PRETTY_FUNCTION__)); | ||||||
15612 | assert(TemplateParameterLists.size() == 0 || TUK != TUK_Reference)(static_cast <bool> (TemplateParameterLists.size() == 0 || TUK != TUK_Reference) ? void (0) : __assert_fail ("TemplateParameterLists.size() == 0 || TUK != TUK_Reference" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15612, __extension__ __PRETTY_FUNCTION__)); | ||||||
15613 | |||||||
15614 | OwnedDecl = false; | ||||||
15615 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | ||||||
15616 | bool ScopedEnum = ScopedEnumKWLoc.isValid(); | ||||||
15617 | |||||||
15618 | // FIXME: Check member specializations more carefully. | ||||||
15619 | bool isMemberSpecialization = false; | ||||||
15620 | bool Invalid = false; | ||||||
15621 | |||||||
15622 | // We only need to do this matching if we have template parameters | ||||||
15623 | // or a scope specifier, which also conveniently avoids this work | ||||||
15624 | // for non-C++ cases. | ||||||
15625 | if (TemplateParameterLists.size() > 0 || | ||||||
15626 | (SS.isNotEmpty() && TUK != TUK_Reference)) { | ||||||
15627 | if (TemplateParameterList *TemplateParams = | ||||||
15628 | MatchTemplateParametersToScopeSpecifier( | ||||||
15629 | KWLoc, NameLoc, SS, nullptr, TemplateParameterLists, | ||||||
15630 | TUK == TUK_Friend, isMemberSpecialization, Invalid)) { | ||||||
15631 | if (Kind == TTK_Enum) { | ||||||
15632 | Diag(KWLoc, diag::err_enum_template); | ||||||
15633 | return nullptr; | ||||||
15634 | } | ||||||
15635 | |||||||
15636 | if (TemplateParams->size() > 0) { | ||||||
15637 | // This is a declaration or definition of a class template (which may | ||||||
15638 | // be a member of another template). | ||||||
15639 | |||||||
15640 | if (Invalid) | ||||||
15641 | return nullptr; | ||||||
15642 | |||||||
15643 | OwnedDecl = false; | ||||||
15644 | DeclResult Result = CheckClassTemplate( | ||||||
15645 | S, TagSpec, TUK, KWLoc, SS, Name, NameLoc, Attrs, TemplateParams, | ||||||
15646 | AS, ModulePrivateLoc, | ||||||
15647 | /*FriendLoc*/ SourceLocation(), TemplateParameterLists.size() - 1, | ||||||
15648 | TemplateParameterLists.data(), SkipBody); | ||||||
15649 | return Result.get(); | ||||||
15650 | } else { | ||||||
15651 | // The "template<>" header is extraneous. | ||||||
15652 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams) | ||||||
15653 | << TypeWithKeyword::getTagTypeKindName(Kind) << Name; | ||||||
15654 | isMemberSpecialization = true; | ||||||
15655 | } | ||||||
15656 | } | ||||||
15657 | |||||||
15658 | if (!TemplateParameterLists.empty() && isMemberSpecialization && | ||||||
15659 | CheckTemplateDeclScope(S, TemplateParameterLists.back())) | ||||||
15660 | return nullptr; | ||||||
15661 | } | ||||||
15662 | |||||||
15663 | // Figure out the underlying type if this a enum declaration. We need to do | ||||||
15664 | // this early, because it's needed to detect if this is an incompatible | ||||||
15665 | // redeclaration. | ||||||
15666 | llvm::PointerUnion<const Type*, TypeSourceInfo*> EnumUnderlying; | ||||||
15667 | bool IsFixed = !UnderlyingType.isUnset() || ScopedEnum; | ||||||
15668 | |||||||
15669 | if (Kind == TTK_Enum) { | ||||||
15670 | if (UnderlyingType.isInvalid() || (!UnderlyingType.get() && ScopedEnum)) { | ||||||
15671 | // No underlying type explicitly specified, or we failed to parse the | ||||||
15672 | // type, default to int. | ||||||
15673 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15674 | } else if (UnderlyingType.get()) { | ||||||
15675 | // C++0x 7.2p2: The type-specifier-seq of an enum-base shall name an | ||||||
15676 | // integral type; any cv-qualification is ignored. | ||||||
15677 | TypeSourceInfo *TI = nullptr; | ||||||
15678 | GetTypeFromParser(UnderlyingType.get(), &TI); | ||||||
15679 | EnumUnderlying = TI; | ||||||
15680 | |||||||
15681 | if (CheckEnumUnderlyingType(TI)) | ||||||
15682 | // Recover by falling back to int. | ||||||
15683 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15684 | |||||||
15685 | if (DiagnoseUnexpandedParameterPack(TI->getTypeLoc().getBeginLoc(), TI, | ||||||
15686 | UPPC_FixedUnderlyingType)) | ||||||
15687 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15688 | |||||||
15689 | } else if (Context.getTargetInfo().getTriple().isWindowsMSVCEnvironment()) { | ||||||
15690 | // For MSVC ABI compatibility, unfixed enums must use an underlying type | ||||||
15691 | // of 'int'. However, if this is an unfixed forward declaration, don't set | ||||||
15692 | // the underlying type unless the user enables -fms-compatibility. This | ||||||
15693 | // makes unfixed forward declared enums incomplete and is more conforming. | ||||||
15694 | if (TUK == TUK_Definition || getLangOpts().MSVCCompat) | ||||||
15695 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15696 | } | ||||||
15697 | } | ||||||
15698 | |||||||
15699 | DeclContext *SearchDC = CurContext; | ||||||
15700 | DeclContext *DC = CurContext; | ||||||
15701 | bool isStdBadAlloc = false; | ||||||
15702 | bool isStdAlignValT = false; | ||||||
15703 | |||||||
15704 | RedeclarationKind Redecl = forRedeclarationInCurContext(); | ||||||
15705 | if (TUK == TUK_Friend || TUK == TUK_Reference) | ||||||
15706 | Redecl = NotForRedeclaration; | ||||||
15707 | |||||||
15708 | /// Create a new tag decl in C/ObjC. Since the ODR-like semantics for ObjC/C | ||||||
15709 | /// implemented asks for structural equivalence checking, the returned decl | ||||||
15710 | /// here is passed back to the parser, allowing the tag body to be parsed. | ||||||
15711 | auto createTagFromNewDecl = [&]() -> TagDecl * { | ||||||
15712 | assert(!getLangOpts().CPlusPlus && "not meant for C++ usage")(static_cast <bool> (!getLangOpts().CPlusPlus && "not meant for C++ usage") ? void (0) : __assert_fail ("!getLangOpts().CPlusPlus && \"not meant for C++ usage\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15712, __extension__ __PRETTY_FUNCTION__)); | ||||||
15713 | // If there is an identifier, use the location of the identifier as the | ||||||
15714 | // location of the decl, otherwise use the location of the struct/union | ||||||
15715 | // keyword. | ||||||
15716 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; | ||||||
15717 | TagDecl *New = nullptr; | ||||||
15718 | |||||||
15719 | if (Kind == TTK_Enum) { | ||||||
15720 | New = EnumDecl::Create(Context, SearchDC, KWLoc, Loc, Name, nullptr, | ||||||
15721 | ScopedEnum, ScopedEnumUsesClassTag, IsFixed); | ||||||
15722 | // If this is an undefined enum, bail. | ||||||
15723 | if (TUK != TUK_Definition && !Invalid) | ||||||
15724 | return nullptr; | ||||||
15725 | if (EnumUnderlying) { | ||||||
15726 | EnumDecl *ED = cast<EnumDecl>(New); | ||||||
15727 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo *>()) | ||||||
15728 | ED->setIntegerTypeSourceInfo(TI); | ||||||
15729 | else | ||||||
15730 | ED->setIntegerType(QualType(EnumUnderlying.get<const Type *>(), 0)); | ||||||
15731 | ED->setPromotionType(ED->getIntegerType()); | ||||||
15732 | } | ||||||
15733 | } else { // struct/union | ||||||
15734 | New = RecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, | ||||||
15735 | nullptr); | ||||||
15736 | } | ||||||
15737 | |||||||
15738 | if (RecordDecl *RD = dyn_cast<RecordDecl>(New)) { | ||||||
15739 | // Add alignment attributes if necessary; these attributes are checked | ||||||
15740 | // when the ASTContext lays out the structure. | ||||||
15741 | // | ||||||
15742 | // It is important for implementing the correct semantics that this | ||||||
15743 | // happen here (in ActOnTag). The #pragma pack stack is | ||||||
15744 | // maintained as a result of parser callbacks which can occur at | ||||||
15745 | // many points during the parsing of a struct declaration (because | ||||||
15746 | // the #pragma tokens are effectively skipped over during the | ||||||
15747 | // parsing of the struct). | ||||||
15748 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) { | ||||||
15749 | AddAlignmentAttributesForRecord(RD); | ||||||
15750 | AddMsStructLayoutForRecord(RD); | ||||||
15751 | } | ||||||
15752 | } | ||||||
15753 | New->setLexicalDeclContext(CurContext); | ||||||
15754 | return New; | ||||||
15755 | }; | ||||||
15756 | |||||||
15757 | LookupResult Previous(*this, Name, NameLoc, LookupTagName, Redecl); | ||||||
15758 | if (Name && SS.isNotEmpty()) { | ||||||
15759 | // We have a nested-name tag ('struct foo::bar'). | ||||||
15760 | |||||||
15761 | // Check for invalid 'foo::'. | ||||||
15762 | if (SS.isInvalid()) { | ||||||
15763 | Name = nullptr; | ||||||
15764 | goto CreateNewDecl; | ||||||
15765 | } | ||||||
15766 | |||||||
15767 | // If this is a friend or a reference to a class in a dependent | ||||||
15768 | // context, don't try to make a decl for it. | ||||||
15769 | if (TUK == TUK_Friend || TUK == TUK_Reference) { | ||||||
15770 | DC = computeDeclContext(SS, false); | ||||||
15771 | if (!DC) { | ||||||
15772 | IsDependent = true; | ||||||
15773 | return nullptr; | ||||||
15774 | } | ||||||
15775 | } else { | ||||||
15776 | DC = computeDeclContext(SS, true); | ||||||
15777 | if (!DC) { | ||||||
15778 | Diag(SS.getRange().getBegin(), diag::err_dependent_nested_name_spec) | ||||||
15779 | << SS.getRange(); | ||||||
15780 | return nullptr; | ||||||
15781 | } | ||||||
15782 | } | ||||||
15783 | |||||||
15784 | if (RequireCompleteDeclContext(SS, DC)) | ||||||
15785 | return nullptr; | ||||||
15786 | |||||||
15787 | SearchDC = DC; | ||||||
15788 | // Look-up name inside 'foo::'. | ||||||
15789 | LookupQualifiedName(Previous, DC); | ||||||
15790 | |||||||
15791 | if (Previous.isAmbiguous()) | ||||||
15792 | return nullptr; | ||||||
15793 | |||||||
15794 | if (Previous.empty()) { | ||||||
15795 | // Name lookup did not find anything. However, if the | ||||||
15796 | // nested-name-specifier refers to the current instantiation, | ||||||
15797 | // and that current instantiation has any dependent base | ||||||
15798 | // classes, we might find something at instantiation time: treat | ||||||
15799 | // this as a dependent elaborated-type-specifier. | ||||||
15800 | // But this only makes any sense for reference-like lookups. | ||||||
15801 | if (Previous.wasNotFoundInCurrentInstantiation() && | ||||||
15802 | (TUK == TUK_Reference || TUK == TUK_Friend)) { | ||||||
15803 | IsDependent = true; | ||||||
15804 | return nullptr; | ||||||
15805 | } | ||||||
15806 | |||||||
15807 | // A tag 'foo::bar' must already exist. | ||||||
15808 | Diag(NameLoc, diag::err_not_tag_in_scope) | ||||||
15809 | << Kind << Name << DC << SS.getRange(); | ||||||
15810 | Name = nullptr; | ||||||
15811 | Invalid = true; | ||||||
15812 | goto CreateNewDecl; | ||||||
15813 | } | ||||||
15814 | } else if (Name) { | ||||||
15815 | // C++14 [class.mem]p14: | ||||||
15816 | // If T is the name of a class, then each of the following shall have a | ||||||
15817 | // name different from T: | ||||||
15818 | // -- every member of class T that is itself a type | ||||||
15819 | if (TUK != TUK_Reference && TUK != TUK_Friend && | ||||||
15820 | DiagnoseClassNameShadow(SearchDC, DeclarationNameInfo(Name, NameLoc))) | ||||||
15821 | return nullptr; | ||||||
15822 | |||||||
15823 | // If this is a named struct, check to see if there was a previous forward | ||||||
15824 | // declaration or definition. | ||||||
15825 | // FIXME: We're looking into outer scopes here, even when we | ||||||
15826 | // shouldn't be. Doing so can result in ambiguities that we | ||||||
15827 | // shouldn't be diagnosing. | ||||||
15828 | LookupName(Previous, S); | ||||||
15829 | |||||||
15830 | // When declaring or defining a tag, ignore ambiguities introduced | ||||||
15831 | // by types using'ed into this scope. | ||||||
15832 | if (Previous.isAmbiguous() && | ||||||
15833 | (TUK == TUK_Definition || TUK == TUK_Declaration)) { | ||||||
15834 | LookupResult::Filter F = Previous.makeFilter(); | ||||||
15835 | while (F.hasNext()) { | ||||||
15836 | NamedDecl *ND = F.next(); | ||||||
15837 | if (!ND->getDeclContext()->getRedeclContext()->Equals( | ||||||
15838 | SearchDC->getRedeclContext())) | ||||||
15839 | F.erase(); | ||||||
15840 | } | ||||||
15841 | F.done(); | ||||||
15842 | } | ||||||
15843 | |||||||
15844 | // C++11 [namespace.memdef]p3: | ||||||
15845 | // If the name in a friend declaration is neither qualified nor | ||||||
15846 | // a template-id and the declaration is a function or an | ||||||
15847 | // elaborated-type-specifier, the lookup to determine whether | ||||||
15848 | // the entity has been previously declared shall not consider | ||||||
15849 | // any scopes outside the innermost enclosing namespace. | ||||||
15850 | // | ||||||
15851 | // MSVC doesn't implement the above rule for types, so a friend tag | ||||||
15852 | // declaration may be a redeclaration of a type declared in an enclosing | ||||||
15853 | // scope. They do implement this rule for friend functions. | ||||||
15854 | // | ||||||
15855 | // Does it matter that this should be by scope instead of by | ||||||
15856 | // semantic context? | ||||||
15857 | if (!Previous.empty() && TUK == TUK_Friend) { | ||||||
15858 | DeclContext *EnclosingNS = SearchDC->getEnclosingNamespaceContext(); | ||||||
15859 | LookupResult::Filter F = Previous.makeFilter(); | ||||||
15860 | bool FriendSawTagOutsideEnclosingNamespace = false; | ||||||
15861 | while (F.hasNext()) { | ||||||
15862 | NamedDecl *ND = F.next(); | ||||||
15863 | DeclContext *DC = ND->getDeclContext()->getRedeclContext(); | ||||||
15864 | if (DC->isFileContext() && | ||||||
15865 | !EnclosingNS->Encloses(ND->getDeclContext())) { | ||||||
15866 | if (getLangOpts().MSVCCompat) | ||||||
15867 | FriendSawTagOutsideEnclosingNamespace = true; | ||||||
15868 | else | ||||||
15869 | F.erase(); | ||||||
15870 | } | ||||||
15871 | } | ||||||
15872 | F.done(); | ||||||
15873 | |||||||
15874 | // Diagnose this MSVC extension in the easy case where lookup would have | ||||||
15875 | // unambiguously found something outside the enclosing namespace. | ||||||
15876 | if (Previous.isSingleResult() && FriendSawTagOutsideEnclosingNamespace) { | ||||||
15877 | NamedDecl *ND = Previous.getFoundDecl(); | ||||||
15878 | Diag(NameLoc, diag::ext_friend_tag_redecl_outside_namespace) | ||||||
15879 | << createFriendTagNNSFixIt(*this, ND, S, NameLoc); | ||||||
15880 | } | ||||||
15881 | } | ||||||
15882 | |||||||
15883 | // Note: there used to be some attempt at recovery here. | ||||||
15884 | if (Previous.isAmbiguous()) | ||||||
15885 | return nullptr; | ||||||
15886 | |||||||
15887 | if (!getLangOpts().CPlusPlus && TUK != TUK_Reference) { | ||||||
15888 | // FIXME: This makes sure that we ignore the contexts associated | ||||||
15889 | // with C structs, unions, and enums when looking for a matching | ||||||
15890 | // tag declaration or definition. See the similar lookup tweak | ||||||
15891 | // in Sema::LookupName; is there a better way to deal with this? | ||||||
15892 | while (isa<RecordDecl>(SearchDC) || isa<EnumDecl>(SearchDC)) | ||||||
15893 | SearchDC = SearchDC->getParent(); | ||||||
15894 | } | ||||||
15895 | } | ||||||
15896 | |||||||
15897 | if (Previous.isSingleResult() && | ||||||
15898 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||
15899 | // Maybe we will complain about the shadowed template parameter. | ||||||
15900 | DiagnoseTemplateParameterShadow(NameLoc, Previous.getFoundDecl()); | ||||||
15901 | // Just pretend that we didn't see the previous declaration. | ||||||
15902 | Previous.clear(); | ||||||
15903 | } | ||||||
15904 | |||||||
15905 | if (getLangOpts().CPlusPlus && Name && DC && StdNamespace && | ||||||
15906 | DC->Equals(getStdNamespace())) { | ||||||
15907 | if (Name->isStr("bad_alloc")) { | ||||||
15908 | // This is a declaration of or a reference to "std::bad_alloc". | ||||||
15909 | isStdBadAlloc = true; | ||||||
15910 | |||||||
15911 | // If std::bad_alloc has been implicitly declared (but made invisible to | ||||||
15912 | // name lookup), fill in this implicit declaration as the previous | ||||||
15913 | // declaration, so that the declarations get chained appropriately. | ||||||
15914 | if (Previous.empty() && StdBadAlloc) | ||||||
15915 | Previous.addDecl(getStdBadAlloc()); | ||||||
15916 | } else if (Name->isStr("align_val_t")) { | ||||||
15917 | isStdAlignValT = true; | ||||||
15918 | if (Previous.empty() && StdAlignValT) | ||||||
15919 | Previous.addDecl(getStdAlignValT()); | ||||||
15920 | } | ||||||
15921 | } | ||||||
15922 | |||||||
15923 | // If we didn't find a previous declaration, and this is a reference | ||||||
15924 | // (or friend reference), move to the correct scope. In C++, we | ||||||
15925 | // also need to do a redeclaration lookup there, just in case | ||||||
15926 | // there's a shadow friend decl. | ||||||
15927 | if (Name && Previous.empty() && | ||||||
15928 | (TUK == TUK_Reference || TUK == TUK_Friend || IsTemplateParamOrArg)) { | ||||||
15929 | if (Invalid) goto CreateNewDecl; | ||||||
15930 | assert(SS.isEmpty())(static_cast <bool> (SS.isEmpty()) ? void (0) : __assert_fail ("SS.isEmpty()", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15930, __extension__ __PRETTY_FUNCTION__)); | ||||||
15931 | |||||||
15932 | if (TUK == TUK_Reference || IsTemplateParamOrArg) { | ||||||
15933 | // C++ [basic.scope.pdecl]p5: | ||||||
15934 | // -- for an elaborated-type-specifier of the form | ||||||
15935 | // | ||||||
15936 | // class-key identifier | ||||||
15937 | // | ||||||
15938 | // if the elaborated-type-specifier is used in the | ||||||
15939 | // decl-specifier-seq or parameter-declaration-clause of a | ||||||
15940 | // function defined in namespace scope, the identifier is | ||||||
15941 | // declared as a class-name in the namespace that contains | ||||||
15942 | // the declaration; otherwise, except as a friend | ||||||
15943 | // declaration, the identifier is declared in the smallest | ||||||
15944 | // non-class, non-function-prototype scope that contains the | ||||||
15945 | // declaration. | ||||||
15946 | // | ||||||
15947 | // C99 6.7.2.3p8 has a similar (but not identical!) provision for | ||||||
15948 | // C structs and unions. | ||||||
15949 | // | ||||||
15950 | // It is an error in C++ to declare (rather than define) an enum | ||||||
15951 | // type, including via an elaborated type specifier. We'll | ||||||
15952 | // diagnose that later; for now, declare the enum in the same | ||||||
15953 | // scope as we would have picked for any other tag type. | ||||||
15954 | // | ||||||
15955 | // GNU C also supports this behavior as part of its incomplete | ||||||
15956 | // enum types extension, while GNU C++ does not. | ||||||
15957 | // | ||||||
15958 | // Find the context where we'll be declaring the tag. | ||||||
15959 | // FIXME: We would like to maintain the current DeclContext as the | ||||||
15960 | // lexical context, | ||||||
15961 | SearchDC = getTagInjectionContext(SearchDC); | ||||||
15962 | |||||||
15963 | // Find the scope where we'll be declaring the tag. | ||||||
15964 | S = getTagInjectionScope(S, getLangOpts()); | ||||||
15965 | } else { | ||||||
15966 | assert(TUK == TUK_Friend)(static_cast <bool> (TUK == TUK_Friend) ? void (0) : __assert_fail ("TUK == TUK_Friend", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 15966, __extension__ __PRETTY_FUNCTION__)); | ||||||
15967 | // C++ [namespace.memdef]p3: | ||||||
15968 | // If a friend declaration in a non-local class first declares a | ||||||
15969 | // class or function, the friend class or function is a member of | ||||||
15970 | // the innermost enclosing namespace. | ||||||
15971 | SearchDC = SearchDC->getEnclosingNamespaceContext(); | ||||||
15972 | } | ||||||
15973 | |||||||
15974 | // In C++, we need to do a redeclaration lookup to properly | ||||||
15975 | // diagnose some problems. | ||||||
15976 | // FIXME: redeclaration lookup is also used (with and without C++) to find a | ||||||
15977 | // hidden declaration so that we don't get ambiguity errors when using a | ||||||
15978 | // type declared by an elaborated-type-specifier. In C that is not correct | ||||||
15979 | // and we should instead merge compatible types found by lookup. | ||||||
15980 | if (getLangOpts().CPlusPlus) { | ||||||
15981 | // FIXME: This can perform qualified lookups into function contexts, | ||||||
15982 | // which are meaningless. | ||||||
15983 | Previous.setRedeclarationKind(forRedeclarationInCurContext()); | ||||||
15984 | LookupQualifiedName(Previous, SearchDC); | ||||||
15985 | } else { | ||||||
15986 | Previous.setRedeclarationKind(forRedeclarationInCurContext()); | ||||||
15987 | LookupName(Previous, S); | ||||||
15988 | } | ||||||
15989 | } | ||||||
15990 | |||||||
15991 | // If we have a known previous declaration to use, then use it. | ||||||
15992 | if (Previous.empty() && SkipBody && SkipBody->Previous) | ||||||
15993 | Previous.addDecl(SkipBody->Previous); | ||||||
15994 | |||||||
15995 | if (!Previous.empty()) { | ||||||
15996 | NamedDecl *PrevDecl = Previous.getFoundDecl(); | ||||||
15997 | NamedDecl *DirectPrevDecl = Previous.getRepresentativeDecl(); | ||||||
15998 | |||||||
15999 | // It's okay to have a tag decl in the same scope as a typedef | ||||||
16000 | // which hides a tag decl in the same scope. Finding this | ||||||
16001 | // insanity with a redeclaration lookup can only actually happen | ||||||
16002 | // in C++. | ||||||
16003 | // | ||||||
16004 | // This is also okay for elaborated-type-specifiers, which is | ||||||
16005 | // technically forbidden by the current standard but which is | ||||||
16006 | // okay according to the likely resolution of an open issue; | ||||||
16007 | // see http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#407 | ||||||
16008 | if (getLangOpts().CPlusPlus) { | ||||||
16009 | if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(PrevDecl)) { | ||||||
16010 | if (const TagType *TT = TD->getUnderlyingType()->getAs<TagType>()) { | ||||||
16011 | TagDecl *Tag = TT->getDecl(); | ||||||
16012 | if (Tag->getDeclName() == Name && | ||||||
16013 | Tag->getDeclContext()->getRedeclContext() | ||||||
16014 | ->Equals(TD->getDeclContext()->getRedeclContext())) { | ||||||
16015 | PrevDecl = Tag; | ||||||
16016 | Previous.clear(); | ||||||
16017 | Previous.addDecl(Tag); | ||||||
16018 | Previous.resolveKind(); | ||||||
16019 | } | ||||||
16020 | } | ||||||
16021 | } | ||||||
16022 | } | ||||||
16023 | |||||||
16024 | // If this is a redeclaration of a using shadow declaration, it must | ||||||
16025 | // declare a tag in the same context. In MSVC mode, we allow a | ||||||
16026 | // redefinition if either context is within the other. | ||||||
16027 | if (auto *Shadow = dyn_cast<UsingShadowDecl>(DirectPrevDecl)) { | ||||||
16028 | auto *OldTag = dyn_cast<TagDecl>(PrevDecl); | ||||||
16029 | if (SS.isEmpty() && TUK != TUK_Reference && TUK != TUK_Friend && | ||||||
16030 | isDeclInScope(Shadow, SearchDC, S, isMemberSpecialization) && | ||||||
16031 | !(OldTag && isAcceptableTagRedeclContext( | ||||||
16032 | *this, OldTag->getDeclContext(), SearchDC))) { | ||||||
16033 | Diag(KWLoc, diag::err_using_decl_conflict_reverse); | ||||||
16034 | Diag(Shadow->getTargetDecl()->getLocation(), | ||||||
16035 | diag::note_using_decl_target); | ||||||
16036 | Diag(Shadow->getIntroducer()->getLocation(), diag::note_using_decl) | ||||||
16037 | << 0; | ||||||
16038 | // Recover by ignoring the old declaration. | ||||||
16039 | Previous.clear(); | ||||||
16040 | goto CreateNewDecl; | ||||||
16041 | } | ||||||
16042 | } | ||||||
16043 | |||||||
16044 | if (TagDecl *PrevTagDecl = dyn_cast<TagDecl>(PrevDecl)) { | ||||||
16045 | // If this is a use of a previous tag, or if the tag is already declared | ||||||
16046 | // in the same scope (so that the definition/declaration completes or | ||||||
16047 | // rementions the tag), reuse the decl. | ||||||
16048 | if (TUK == TUK_Reference || TUK == TUK_Friend || | ||||||
16049 | isDeclInScope(DirectPrevDecl, SearchDC, S, | ||||||
16050 | SS.isNotEmpty() || isMemberSpecialization)) { | ||||||
16051 | // Make sure that this wasn't declared as an enum and now used as a | ||||||
16052 | // struct or something similar. | ||||||
16053 | if (!isAcceptableTagRedeclaration(PrevTagDecl, Kind, | ||||||
16054 | TUK == TUK_Definition, KWLoc, | ||||||
16055 | Name)) { | ||||||
16056 | bool SafeToContinue | ||||||
16057 | = (PrevTagDecl->getTagKind() != TTK_Enum && | ||||||
16058 | Kind != TTK_Enum); | ||||||
16059 | if (SafeToContinue) | ||||||
16060 | Diag(KWLoc, diag::err_use_with_wrong_tag) | ||||||
16061 | << Name | ||||||
16062 | << FixItHint::CreateReplacement(SourceRange(KWLoc), | ||||||
16063 | PrevTagDecl->getKindName()); | ||||||
16064 | else | ||||||
16065 | Diag(KWLoc, diag::err_use_with_wrong_tag) << Name; | ||||||
16066 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); | ||||||
16067 | |||||||
16068 | if (SafeToContinue) | ||||||
16069 | Kind = PrevTagDecl->getTagKind(); | ||||||
16070 | else { | ||||||
16071 | // Recover by making this an anonymous redefinition. | ||||||
16072 | Name = nullptr; | ||||||
16073 | Previous.clear(); | ||||||
16074 | Invalid = true; | ||||||
16075 | } | ||||||
16076 | } | ||||||
16077 | |||||||
16078 | if (Kind == TTK_Enum && PrevTagDecl->getTagKind() == TTK_Enum) { | ||||||
16079 | const EnumDecl *PrevEnum = cast<EnumDecl>(PrevTagDecl); | ||||||
16080 | if (TUK == TUK_Reference || TUK == TUK_Friend) | ||||||
16081 | return PrevTagDecl; | ||||||
16082 | |||||||
16083 | QualType EnumUnderlyingTy; | ||||||
16084 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) | ||||||
16085 | EnumUnderlyingTy = TI->getType().getUnqualifiedType(); | ||||||
16086 | else if (const Type *T = EnumUnderlying.dyn_cast<const Type*>()) | ||||||
16087 | EnumUnderlyingTy = QualType(T, 0); | ||||||
16088 | |||||||
16089 | // All conflicts with previous declarations are recovered by | ||||||
16090 | // returning the previous declaration, unless this is a definition, | ||||||
16091 | // in which case we want the caller to bail out. | ||||||
16092 | if (CheckEnumRedeclaration(NameLoc.isValid() ? NameLoc : KWLoc, | ||||||
16093 | ScopedEnum, EnumUnderlyingTy, | ||||||
16094 | IsFixed, PrevEnum)) | ||||||
16095 | return TUK == TUK_Declaration ? PrevTagDecl : nullptr; | ||||||
16096 | } | ||||||
16097 | |||||||
16098 | // C++11 [class.mem]p1: | ||||||
16099 | // A member shall not be declared twice in the member-specification, | ||||||
16100 | // except that a nested class or member class template can be declared | ||||||
16101 | // and then later defined. | ||||||
16102 | if (TUK == TUK_Declaration && PrevDecl->isCXXClassMember() && | ||||||
16103 | S->isDeclScope(PrevDecl)) { | ||||||
16104 | Diag(NameLoc, diag::ext_member_redeclared); | ||||||
16105 | Diag(PrevTagDecl->getLocation(), diag::note_previous_declaration); | ||||||
16106 | } | ||||||
16107 | |||||||
16108 | if (!Invalid) { | ||||||
16109 | // If this is a use, just return the declaration we found, unless | ||||||
16110 | // we have attributes. | ||||||
16111 | if (TUK == TUK_Reference || TUK == TUK_Friend) { | ||||||
16112 | if (!Attrs.empty()) { | ||||||
16113 | // FIXME: Diagnose these attributes. For now, we create a new | ||||||
16114 | // declaration to hold them. | ||||||
16115 | } else if (TUK == TUK_Reference && | ||||||
16116 | (PrevTagDecl->getFriendObjectKind() == | ||||||
16117 | Decl::FOK_Undeclared || | ||||||
16118 | PrevDecl->getOwningModule() != getCurrentModule()) && | ||||||
16119 | SS.isEmpty()) { | ||||||
16120 | // This declaration is a reference to an existing entity, but | ||||||
16121 | // has different visibility from that entity: it either makes | ||||||
16122 | // a friend visible or it makes a type visible in a new module. | ||||||
16123 | // In either case, create a new declaration. We only do this if | ||||||
16124 | // the declaration would have meant the same thing if no prior | ||||||
16125 | // declaration were found, that is, if it was found in the same | ||||||
16126 | // scope where we would have injected a declaration. | ||||||
16127 | if (!getTagInjectionContext(CurContext)->getRedeclContext() | ||||||
16128 | ->Equals(PrevDecl->getDeclContext()->getRedeclContext())) | ||||||
16129 | return PrevTagDecl; | ||||||
16130 | // This is in the injected scope, create a new declaration in | ||||||
16131 | // that scope. | ||||||
16132 | S = getTagInjectionScope(S, getLangOpts()); | ||||||
16133 | } else { | ||||||
16134 | return PrevTagDecl; | ||||||
16135 | } | ||||||
16136 | } | ||||||
16137 | |||||||
16138 | // Diagnose attempts to redefine a tag. | ||||||
16139 | if (TUK == TUK_Definition) { | ||||||
16140 | if (NamedDecl *Def = PrevTagDecl->getDefinition()) { | ||||||
16141 | // If we're defining a specialization and the previous definition | ||||||
16142 | // is from an implicit instantiation, don't emit an error | ||||||
16143 | // here; we'll catch this in the general case below. | ||||||
16144 | bool IsExplicitSpecializationAfterInstantiation = false; | ||||||
16145 | if (isMemberSpecialization) { | ||||||
16146 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Def)) | ||||||
16147 | IsExplicitSpecializationAfterInstantiation = | ||||||
16148 | RD->getTemplateSpecializationKind() != | ||||||
16149 | TSK_ExplicitSpecialization; | ||||||
16150 | else if (EnumDecl *ED = dyn_cast<EnumDecl>(Def)) | ||||||
16151 | IsExplicitSpecializationAfterInstantiation = | ||||||
16152 | ED->getTemplateSpecializationKind() != | ||||||
16153 | TSK_ExplicitSpecialization; | ||||||
16154 | } | ||||||
16155 | |||||||
16156 | // Note that clang allows ODR-like semantics for ObjC/C, i.e., do | ||||||
16157 | // not keep more that one definition around (merge them). However, | ||||||
16158 | // ensure the decl passes the structural compatibility check in | ||||||
16159 | // C11 6.2.7/1 (or 6.1.2.6/1 in C89). | ||||||
16160 | NamedDecl *Hidden = nullptr; | ||||||
16161 | if (SkipBody && !hasVisibleDefinition(Def, &Hidden)) { | ||||||
16162 | // There is a definition of this tag, but it is not visible. We | ||||||
16163 | // explicitly make use of C++'s one definition rule here, and | ||||||
16164 | // assume that this definition is identical to the hidden one | ||||||
16165 | // we already have. Make the existing definition visible and | ||||||
16166 | // use it in place of this one. | ||||||
16167 | if (!getLangOpts().CPlusPlus) { | ||||||
16168 | // Postpone making the old definition visible until after we | ||||||
16169 | // complete parsing the new one and do the structural | ||||||
16170 | // comparison. | ||||||
16171 | SkipBody->CheckSameAsPrevious = true; | ||||||
16172 | SkipBody->New = createTagFromNewDecl(); | ||||||
16173 | SkipBody->Previous = Def; | ||||||
16174 | return Def; | ||||||
16175 | } else { | ||||||
16176 | SkipBody->ShouldSkip = true; | ||||||
16177 | SkipBody->Previous = Def; | ||||||
16178 | makeMergedDefinitionVisible(Hidden); | ||||||
16179 | // Carry on and handle it like a normal definition. We'll | ||||||
16180 | // skip starting the definitiion later. | ||||||
16181 | } | ||||||
16182 | } else if (!IsExplicitSpecializationAfterInstantiation) { | ||||||
16183 | // A redeclaration in function prototype scope in C isn't | ||||||
16184 | // visible elsewhere, so merely issue a warning. | ||||||
16185 | if (!getLangOpts().CPlusPlus && S->containedInPrototypeScope()) | ||||||
16186 | Diag(NameLoc, diag::warn_redefinition_in_param_list) << Name; | ||||||
16187 | else | ||||||
16188 | Diag(NameLoc, diag::err_redefinition) << Name; | ||||||
16189 | notePreviousDefinition(Def, | ||||||
16190 | NameLoc.isValid() ? NameLoc : KWLoc); | ||||||
16191 | // If this is a redefinition, recover by making this | ||||||
16192 | // struct be anonymous, which will make any later | ||||||
16193 | // references get the previous definition. | ||||||
16194 | Name = nullptr; | ||||||
16195 | Previous.clear(); | ||||||
16196 | Invalid = true; | ||||||
16197 | } | ||||||
16198 | } else { | ||||||
16199 | // If the type is currently being defined, complain | ||||||
16200 | // about a nested redefinition. | ||||||
16201 | auto *TD = Context.getTagDeclType(PrevTagDecl)->getAsTagDecl(); | ||||||
16202 | if (TD->isBeingDefined()) { | ||||||
16203 | Diag(NameLoc, diag::err_nested_redefinition) << Name; | ||||||
16204 | Diag(PrevTagDecl->getLocation(), | ||||||
16205 | diag::note_previous_definition); | ||||||
16206 | Name = nullptr; | ||||||
16207 | Previous.clear(); | ||||||
16208 | Invalid = true; | ||||||
16209 | } | ||||||
16210 | } | ||||||
16211 | |||||||
16212 | // Okay, this is definition of a previously declared or referenced | ||||||
16213 | // tag. We're going to create a new Decl for it. | ||||||
16214 | } | ||||||
16215 | |||||||
16216 | // Okay, we're going to make a redeclaration. If this is some kind | ||||||
16217 | // of reference, make sure we build the redeclaration in the same DC | ||||||
16218 | // as the original, and ignore the current access specifier. | ||||||
16219 | if (TUK == TUK_Friend || TUK == TUK_Reference) { | ||||||
16220 | SearchDC = PrevTagDecl->getDeclContext(); | ||||||
16221 | AS = AS_none; | ||||||
16222 | } | ||||||
16223 | } | ||||||
16224 | // If we get here we have (another) forward declaration or we | ||||||
16225 | // have a definition. Just create a new decl. | ||||||
16226 | |||||||
16227 | } else { | ||||||
16228 | // If we get here, this is a definition of a new tag type in a nested | ||||||
16229 | // scope, e.g. "struct foo; void bar() { struct foo; }", just create a | ||||||
16230 | // new decl/type. We set PrevDecl to NULL so that the entities | ||||||
16231 | // have distinct types. | ||||||
16232 | Previous.clear(); | ||||||
16233 | } | ||||||
16234 | // If we get here, we're going to create a new Decl. If PrevDecl | ||||||
16235 | // is non-NULL, it's a definition of the tag declared by | ||||||
16236 | // PrevDecl. If it's NULL, we have a new definition. | ||||||
16237 | |||||||
16238 | // Otherwise, PrevDecl is not a tag, but was found with tag | ||||||
16239 | // lookup. This is only actually possible in C++, where a few | ||||||
16240 | // things like templates still live in the tag namespace. | ||||||
16241 | } else { | ||||||
16242 | // Use a better diagnostic if an elaborated-type-specifier | ||||||
16243 | // found the wrong kind of type on the first | ||||||
16244 | // (non-redeclaration) lookup. | ||||||
16245 | if ((TUK == TUK_Reference || TUK == TUK_Friend) && | ||||||
16246 | !Previous.isForRedeclaration()) { | ||||||
16247 | NonTagKind NTK = getNonTagTypeDeclKind(PrevDecl, Kind); | ||||||
16248 | Diag(NameLoc, diag::err_tag_reference_non_tag) << PrevDecl << NTK | ||||||
16249 | << Kind; | ||||||
16250 | Diag(PrevDecl->getLocation(), diag::note_declared_at); | ||||||
16251 | Invalid = true; | ||||||
16252 | |||||||
16253 | // Otherwise, only diagnose if the declaration is in scope. | ||||||
16254 | } else if (!isDeclInScope(DirectPrevDecl, SearchDC, S, | ||||||
16255 | SS.isNotEmpty() || isMemberSpecialization)) { | ||||||
16256 | // do nothing | ||||||
16257 | |||||||
16258 | // Diagnose implicit declarations introduced by elaborated types. | ||||||
16259 | } else if (TUK == TUK_Reference || TUK == TUK_Friend) { | ||||||
16260 | NonTagKind NTK = getNonTagTypeDeclKind(PrevDecl, Kind); | ||||||
16261 | Diag(NameLoc, diag::err_tag_reference_conflict) << NTK; | ||||||
16262 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; | ||||||
16263 | Invalid = true; | ||||||
16264 | |||||||
16265 | // Otherwise it's a declaration. Call out a particularly common | ||||||
16266 | // case here. | ||||||
16267 | } else if (TypedefNameDecl *TND = dyn_cast<TypedefNameDecl>(PrevDecl)) { | ||||||
16268 | unsigned Kind = 0; | ||||||
16269 | if (isa<TypeAliasDecl>(PrevDecl)) Kind = 1; | ||||||
16270 | Diag(NameLoc, diag::err_tag_definition_of_typedef) | ||||||
16271 | << Name << Kind << TND->getUnderlyingType(); | ||||||
16272 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; | ||||||
16273 | Invalid = true; | ||||||
16274 | |||||||
16275 | // Otherwise, diagnose. | ||||||
16276 | } else { | ||||||
16277 | // The tag name clashes with something else in the target scope, | ||||||
16278 | // issue an error and recover by making this tag be anonymous. | ||||||
16279 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; | ||||||
16280 | notePreviousDefinition(PrevDecl, NameLoc); | ||||||
16281 | Name = nullptr; | ||||||
16282 | Invalid = true; | ||||||
16283 | } | ||||||
16284 | |||||||
16285 | // The existing declaration isn't relevant to us; we're in a | ||||||
16286 | // new scope, so clear out the previous declaration. | ||||||
16287 | Previous.clear(); | ||||||
16288 | } | ||||||
16289 | } | ||||||
16290 | |||||||
16291 | CreateNewDecl: | ||||||
16292 | |||||||
16293 | TagDecl *PrevDecl = nullptr; | ||||||
16294 | if (Previous.isSingleResult()) | ||||||
16295 | PrevDecl = cast<TagDecl>(Previous.getFoundDecl()); | ||||||
16296 | |||||||
16297 | // If there is an identifier, use the location of the identifier as the | ||||||
16298 | // location of the decl, otherwise use the location of the struct/union | ||||||
16299 | // keyword. | ||||||
16300 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; | ||||||
16301 | |||||||
16302 | // Otherwise, create a new declaration. If there is a previous | ||||||
16303 | // declaration of the same entity, the two will be linked via | ||||||
16304 | // PrevDecl. | ||||||
16305 | TagDecl *New; | ||||||
16306 | |||||||
16307 | if (Kind == TTK_Enum) { | ||||||
16308 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: | ||||||
16309 | // enum X { A, B, C } D; D should chain to X. | ||||||
16310 | New = EnumDecl::Create(Context, SearchDC, KWLoc, Loc, Name, | ||||||
16311 | cast_or_null<EnumDecl>(PrevDecl), ScopedEnum, | ||||||
16312 | ScopedEnumUsesClassTag, IsFixed); | ||||||
16313 | |||||||
16314 | if (isStdAlignValT && (!StdAlignValT || getStdAlignValT()->isImplicit())) | ||||||
16315 | StdAlignValT = cast<EnumDecl>(New); | ||||||
16316 | |||||||
16317 | // If this is an undefined enum, warn. | ||||||
16318 | if (TUK != TUK_Definition && !Invalid) { | ||||||
16319 | TagDecl *Def; | ||||||
16320 | if (IsFixed && cast<EnumDecl>(New)->isFixed()) { | ||||||
16321 | // C++0x: 7.2p2: opaque-enum-declaration. | ||||||
16322 | // Conflicts are diagnosed above. Do nothing. | ||||||
16323 | } | ||||||
16324 | else if (PrevDecl && (Def = cast<EnumDecl>(PrevDecl)->getDefinition())) { | ||||||
16325 | Diag(Loc, diag::ext_forward_ref_enum_def) | ||||||
16326 | << New; | ||||||
16327 | Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
16328 | } else { | ||||||
16329 | unsigned DiagID = diag::ext_forward_ref_enum; | ||||||
16330 | if (getLangOpts().MSVCCompat) | ||||||
16331 | DiagID = diag::ext_ms_forward_ref_enum; | ||||||
16332 | else if (getLangOpts().CPlusPlus) | ||||||
16333 | DiagID = diag::err_forward_ref_enum; | ||||||
16334 | Diag(Loc, DiagID); | ||||||
16335 | } | ||||||
16336 | } | ||||||
16337 | |||||||
16338 | if (EnumUnderlying) { | ||||||
16339 | EnumDecl *ED = cast<EnumDecl>(New); | ||||||
16340 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) | ||||||
16341 | ED->setIntegerTypeSourceInfo(TI); | ||||||
16342 | else | ||||||
16343 | ED->setIntegerType(QualType(EnumUnderlying.get<const Type*>(), 0)); | ||||||
16344 | ED->setPromotionType(ED->getIntegerType()); | ||||||
16345 | assert(ED->isComplete() && "enum with type should be complete")(static_cast <bool> (ED->isComplete() && "enum with type should be complete" ) ? void (0) : __assert_fail ("ED->isComplete() && \"enum with type should be complete\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16345, __extension__ __PRETTY_FUNCTION__)); | ||||||
16346 | } | ||||||
16347 | } else { | ||||||
16348 | // struct/union/class | ||||||
16349 | |||||||
16350 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: | ||||||
16351 | // struct X { int A; } D; D should chain to X. | ||||||
16352 | if (getLangOpts().CPlusPlus) { | ||||||
16353 | // FIXME: Look for a way to use RecordDecl for simple structs. | ||||||
16354 | New = CXXRecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, | ||||||
16355 | cast_or_null<CXXRecordDecl>(PrevDecl)); | ||||||
16356 | |||||||
16357 | if (isStdBadAlloc && (!StdBadAlloc || getStdBadAlloc()->isImplicit())) | ||||||
16358 | StdBadAlloc = cast<CXXRecordDecl>(New); | ||||||
16359 | } else | ||||||
16360 | New = RecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, | ||||||
16361 | cast_or_null<RecordDecl>(PrevDecl)); | ||||||
16362 | } | ||||||
16363 | |||||||
16364 | // C++11 [dcl.type]p3: | ||||||
16365 | // A type-specifier-seq shall not define a class or enumeration [...]. | ||||||
16366 | if (getLangOpts().CPlusPlus && (IsTypeSpecifier || IsTemplateParamOrArg) && | ||||||
16367 | TUK == TUK_Definition) { | ||||||
16368 | Diag(New->getLocation(), diag::err_type_defined_in_type_specifier) | ||||||
16369 | << Context.getTagDeclType(New); | ||||||
16370 | Invalid = true; | ||||||
16371 | } | ||||||
16372 | |||||||
16373 | if (!Invalid && getLangOpts().CPlusPlus && TUK == TUK_Definition && | ||||||
16374 | DC->getDeclKind() == Decl::Enum) { | ||||||
16375 | Diag(New->getLocation(), diag::err_type_defined_in_enum) | ||||||
16376 | << Context.getTagDeclType(New); | ||||||
16377 | Invalid = true; | ||||||
16378 | } | ||||||
16379 | |||||||
16380 | // Maybe add qualifier info. | ||||||
16381 | if (SS.isNotEmpty()) { | ||||||
16382 | if (SS.isSet()) { | ||||||
16383 | // If this is either a declaration or a definition, check the | ||||||
16384 | // nested-name-specifier against the current context. | ||||||
16385 | if ((TUK == TUK_Definition || TUK == TUK_Declaration) && | ||||||
16386 | diagnoseQualifiedDeclaration(SS, DC, OrigName, Loc, | ||||||
16387 | isMemberSpecialization)) | ||||||
16388 | Invalid = true; | ||||||
16389 | |||||||
16390 | New->setQualifierInfo(SS.getWithLocInContext(Context)); | ||||||
16391 | if (TemplateParameterLists.size() > 0) { | ||||||
16392 | New->setTemplateParameterListsInfo(Context, TemplateParameterLists); | ||||||
16393 | } | ||||||
16394 | } | ||||||
16395 | else | ||||||
16396 | Invalid = true; | ||||||
16397 | } | ||||||
16398 | |||||||
16399 | if (RecordDecl *RD = dyn_cast<RecordDecl>(New)) { | ||||||
16400 | // Add alignment attributes if necessary; these attributes are checked when | ||||||
16401 | // the ASTContext lays out the structure. | ||||||
16402 | // | ||||||
16403 | // It is important for implementing the correct semantics that this | ||||||
16404 | // happen here (in ActOnTag). The #pragma pack stack is | ||||||
16405 | // maintained as a result of parser callbacks which can occur at | ||||||
16406 | // many points during the parsing of a struct declaration (because | ||||||
16407 | // the #pragma tokens are effectively skipped over during the | ||||||
16408 | // parsing of the struct). | ||||||
16409 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) { | ||||||
16410 | AddAlignmentAttributesForRecord(RD); | ||||||
16411 | AddMsStructLayoutForRecord(RD); | ||||||
16412 | } | ||||||
16413 | } | ||||||
16414 | |||||||
16415 | if (ModulePrivateLoc.isValid()) { | ||||||
16416 | if (isMemberSpecialization) | ||||||
16417 | Diag(New->getLocation(), diag::err_module_private_specialization) | ||||||
16418 | << 2 | ||||||
16419 | << FixItHint::CreateRemoval(ModulePrivateLoc); | ||||||
16420 | // __module_private__ does not apply to local classes. However, we only | ||||||
16421 | // diagnose this as an error when the declaration specifiers are | ||||||
16422 | // freestanding. Here, we just ignore the __module_private__. | ||||||
16423 | else if (!SearchDC->isFunctionOrMethod()) | ||||||
16424 | New->setModulePrivate(); | ||||||
16425 | } | ||||||
16426 | |||||||
16427 | // If this is a specialization of a member class (of a class template), | ||||||
16428 | // check the specialization. | ||||||
16429 | if (isMemberSpecialization && CheckMemberSpecialization(New, Previous)) | ||||||
16430 | Invalid = true; | ||||||
16431 | |||||||
16432 | // If we're declaring or defining a tag in function prototype scope in C, | ||||||
16433 | // note that this type can only be used within the function and add it to | ||||||
16434 | // the list of decls to inject into the function definition scope. | ||||||
16435 | if ((Name || Kind == TTK_Enum) && | ||||||
16436 | getNonFieldDeclScope(S)->isFunctionPrototypeScope()) { | ||||||
16437 | if (getLangOpts().CPlusPlus) { | ||||||
16438 | // C++ [dcl.fct]p6: | ||||||
16439 | // Types shall not be defined in return or parameter types. | ||||||
16440 | if (TUK == TUK_Definition && !IsTypeSpecifier) { | ||||||
16441 | Diag(Loc, diag::err_type_defined_in_param_type) | ||||||
16442 | << Name; | ||||||
16443 | Invalid = true; | ||||||
16444 | } | ||||||
16445 | } else if (!PrevDecl) { | ||||||
16446 | Diag(Loc, diag::warn_decl_in_param_list) << Context.getTagDeclType(New); | ||||||
16447 | } | ||||||
16448 | } | ||||||
16449 | |||||||
16450 | if (Invalid) | ||||||
16451 | New->setInvalidDecl(); | ||||||
16452 | |||||||
16453 | // Set the lexical context. If the tag has a C++ scope specifier, the | ||||||
16454 | // lexical context will be different from the semantic context. | ||||||
16455 | New->setLexicalDeclContext(CurContext); | ||||||
16456 | |||||||
16457 | // Mark this as a friend decl if applicable. | ||||||
16458 | // In Microsoft mode, a friend declaration also acts as a forward | ||||||
16459 | // declaration so we always pass true to setObjectOfFriendDecl to make | ||||||
16460 | // the tag name visible. | ||||||
16461 | if (TUK == TUK_Friend) | ||||||
16462 | New->setObjectOfFriendDecl(getLangOpts().MSVCCompat); | ||||||
16463 | |||||||
16464 | // Set the access specifier. | ||||||
16465 | if (!Invalid && SearchDC->isRecord()) | ||||||
16466 | SetMemberAccessSpecifier(New, PrevDecl, AS); | ||||||
16467 | |||||||
16468 | if (PrevDecl) | ||||||
16469 | CheckRedeclarationModuleOwnership(New, PrevDecl); | ||||||
16470 | |||||||
16471 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) | ||||||
16472 | New->startDefinition(); | ||||||
16473 | |||||||
16474 | ProcessDeclAttributeList(S, New, Attrs); | ||||||
16475 | AddPragmaAttributes(S, New); | ||||||
16476 | |||||||
16477 | // If this has an identifier, add it to the scope stack. | ||||||
16478 | if (TUK == TUK_Friend) { | ||||||
16479 | // We might be replacing an existing declaration in the lookup tables; | ||||||
16480 | // if so, borrow its access specifier. | ||||||
16481 | if (PrevDecl) | ||||||
16482 | New->setAccess(PrevDecl->getAccess()); | ||||||
16483 | |||||||
16484 | DeclContext *DC = New->getDeclContext()->getRedeclContext(); | ||||||
16485 | DC->makeDeclVisibleInContext(New); | ||||||
16486 | if (Name) // can be null along some error paths | ||||||
16487 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) | ||||||
16488 | PushOnScopeChains(New, EnclosingScope, /* AddToContext = */ false); | ||||||
16489 | } else if (Name) { | ||||||
16490 | S = getNonFieldDeclScope(S); | ||||||
16491 | PushOnScopeChains(New, S, true); | ||||||
16492 | } else { | ||||||
16493 | CurContext->addDecl(New); | ||||||
16494 | } | ||||||
16495 | |||||||
16496 | // If this is the C FILE type, notify the AST context. | ||||||
16497 | if (IdentifierInfo *II = New->getIdentifier()) | ||||||
16498 | if (!New->isInvalidDecl() && | ||||||
16499 | New->getDeclContext()->getRedeclContext()->isTranslationUnit() && | ||||||
16500 | II->isStr("FILE")) | ||||||
16501 | Context.setFILEDecl(New); | ||||||
16502 | |||||||
16503 | if (PrevDecl) | ||||||
16504 | mergeDeclAttributes(New, PrevDecl); | ||||||
16505 | |||||||
16506 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(New)) | ||||||
16507 | inferGslOwnerPointerAttribute(CXXRD); | ||||||
16508 | |||||||
16509 | // If there's a #pragma GCC visibility in scope, set the visibility of this | ||||||
16510 | // record. | ||||||
16511 | AddPushedVisibilityAttribute(New); | ||||||
16512 | |||||||
16513 | if (isMemberSpecialization && !New->isInvalidDecl()) | ||||||
16514 | CompleteMemberSpecialization(New, Previous); | ||||||
16515 | |||||||
16516 | OwnedDecl = true; | ||||||
16517 | // In C++, don't return an invalid declaration. We can't recover well from | ||||||
16518 | // the cases where we make the type anonymous. | ||||||
16519 | if (Invalid && getLangOpts().CPlusPlus) { | ||||||
16520 | if (New->isBeingDefined()) | ||||||
16521 | if (auto RD = dyn_cast<RecordDecl>(New)) | ||||||
16522 | RD->completeDefinition(); | ||||||
16523 | return nullptr; | ||||||
16524 | } else if (SkipBody && SkipBody->ShouldSkip) { | ||||||
16525 | return SkipBody->Previous; | ||||||
16526 | } else { | ||||||
16527 | return New; | ||||||
16528 | } | ||||||
16529 | } | ||||||
16530 | |||||||
16531 | void Sema::ActOnTagStartDefinition(Scope *S, Decl *TagD) { | ||||||
16532 | AdjustDeclIfTemplate(TagD); | ||||||
16533 | TagDecl *Tag = cast<TagDecl>(TagD); | ||||||
16534 | |||||||
16535 | // Enter the tag context. | ||||||
16536 | PushDeclContext(S, Tag); | ||||||
16537 | |||||||
16538 | ActOnDocumentableDecl(TagD); | ||||||
16539 | |||||||
16540 | // If there's a #pragma GCC visibility in scope, set the visibility of this | ||||||
16541 | // record. | ||||||
16542 | AddPushedVisibilityAttribute(Tag); | ||||||
16543 | } | ||||||
16544 | |||||||
16545 | bool Sema::ActOnDuplicateDefinition(DeclSpec &DS, Decl *Prev, | ||||||
16546 | SkipBodyInfo &SkipBody) { | ||||||
16547 | if (!hasStructuralCompatLayout(Prev, SkipBody.New)) | ||||||
16548 | return false; | ||||||
16549 | |||||||
16550 | // Make the previous decl visible. | ||||||
16551 | makeMergedDefinitionVisible(SkipBody.Previous); | ||||||
16552 | return true; | ||||||
16553 | } | ||||||
16554 | |||||||
16555 | Decl *Sema::ActOnObjCContainerStartDefinition(Decl *IDecl) { | ||||||
16556 | assert(isa<ObjCContainerDecl>(IDecl) &&(static_cast <bool> (isa<ObjCContainerDecl>(IDecl ) && "ActOnObjCContainerStartDefinition - Not ObjCContainerDecl" ) ? void (0) : __assert_fail ("isa<ObjCContainerDecl>(IDecl) && \"ActOnObjCContainerStartDefinition - Not ObjCContainerDecl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16557, __extension__ __PRETTY_FUNCTION__)) | ||||||
16557 | "ActOnObjCContainerStartDefinition - Not ObjCContainerDecl")(static_cast <bool> (isa<ObjCContainerDecl>(IDecl ) && "ActOnObjCContainerStartDefinition - Not ObjCContainerDecl" ) ? void (0) : __assert_fail ("isa<ObjCContainerDecl>(IDecl) && \"ActOnObjCContainerStartDefinition - Not ObjCContainerDecl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16557, __extension__ __PRETTY_FUNCTION__)); | ||||||
16558 | DeclContext *OCD = cast<DeclContext>(IDecl); | ||||||
16559 | assert(OCD->getLexicalParent() == CurContext &&(static_cast <bool> (OCD->getLexicalParent() == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("OCD->getLexicalParent() == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16560, __extension__ __PRETTY_FUNCTION__)) | ||||||
16560 | "The next DeclContext should be lexically contained in the current one.")(static_cast <bool> (OCD->getLexicalParent() == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("OCD->getLexicalParent() == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16560, __extension__ __PRETTY_FUNCTION__)); | ||||||
16561 | CurContext = OCD; | ||||||
16562 | return IDecl; | ||||||
16563 | } | ||||||
16564 | |||||||
16565 | void Sema::ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagD, | ||||||
16566 | SourceLocation FinalLoc, | ||||||
16567 | bool IsFinalSpelledSealed, | ||||||
16568 | bool IsAbstract, | ||||||
16569 | SourceLocation LBraceLoc) { | ||||||
16570 | AdjustDeclIfTemplate(TagD); | ||||||
16571 | CXXRecordDecl *Record = cast<CXXRecordDecl>(TagD); | ||||||
16572 | |||||||
16573 | FieldCollector->StartClass(); | ||||||
16574 | |||||||
16575 | if (!Record->getIdentifier()) | ||||||
16576 | return; | ||||||
16577 | |||||||
16578 | if (IsAbstract) | ||||||
16579 | Record->markAbstract(); | ||||||
16580 | |||||||
16581 | if (FinalLoc.isValid()) { | ||||||
16582 | Record->addAttr(FinalAttr::Create( | ||||||
16583 | Context, FinalLoc, AttributeCommonInfo::AS_Keyword, | ||||||
16584 | static_cast<FinalAttr::Spelling>(IsFinalSpelledSealed))); | ||||||
16585 | } | ||||||
16586 | // C++ [class]p2: | ||||||
16587 | // [...] The class-name is also inserted into the scope of the | ||||||
16588 | // class itself; this is known as the injected-class-name. For | ||||||
16589 | // purposes of access checking, the injected-class-name is treated | ||||||
16590 | // as if it were a public member name. | ||||||
16591 | CXXRecordDecl *InjectedClassName = CXXRecordDecl::Create( | ||||||
16592 | Context, Record->getTagKind(), CurContext, Record->getBeginLoc(), | ||||||
16593 | Record->getLocation(), Record->getIdentifier(), | ||||||
16594 | /*PrevDecl=*/nullptr, | ||||||
16595 | /*DelayTypeCreation=*/true); | ||||||
16596 | Context.getTypeDeclType(InjectedClassName, Record); | ||||||
16597 | InjectedClassName->setImplicit(); | ||||||
16598 | InjectedClassName->setAccess(AS_public); | ||||||
16599 | if (ClassTemplateDecl *Template = Record->getDescribedClassTemplate()) | ||||||
16600 | InjectedClassName->setDescribedClassTemplate(Template); | ||||||
16601 | PushOnScopeChains(InjectedClassName, S); | ||||||
16602 | assert(InjectedClassName->isInjectedClassName() &&(static_cast <bool> (InjectedClassName->isInjectedClassName () && "Broken injected-class-name") ? void (0) : __assert_fail ("InjectedClassName->isInjectedClassName() && \"Broken injected-class-name\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16603, __extension__ __PRETTY_FUNCTION__)) | ||||||
16603 | "Broken injected-class-name")(static_cast <bool> (InjectedClassName->isInjectedClassName () && "Broken injected-class-name") ? void (0) : __assert_fail ("InjectedClassName->isInjectedClassName() && \"Broken injected-class-name\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16603, __extension__ __PRETTY_FUNCTION__)); | ||||||
16604 | } | ||||||
16605 | |||||||
16606 | void Sema::ActOnTagFinishDefinition(Scope *S, Decl *TagD, | ||||||
16607 | SourceRange BraceRange) { | ||||||
16608 | AdjustDeclIfTemplate(TagD); | ||||||
16609 | TagDecl *Tag = cast<TagDecl>(TagD); | ||||||
16610 | Tag->setBraceRange(BraceRange); | ||||||
16611 | |||||||
16612 | // Make sure we "complete" the definition even it is invalid. | ||||||
16613 | if (Tag->isBeingDefined()) { | ||||||
16614 | assert(Tag->isInvalidDecl() && "We should already have completed it")(static_cast <bool> (Tag->isInvalidDecl() && "We should already have completed it") ? void (0) : __assert_fail ("Tag->isInvalidDecl() && \"We should already have completed it\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16614, __extension__ __PRETTY_FUNCTION__)); | ||||||
16615 | if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) | ||||||
16616 | RD->completeDefinition(); | ||||||
16617 | } | ||||||
16618 | |||||||
16619 | if (isa<CXXRecordDecl>(Tag)) { | ||||||
16620 | FieldCollector->FinishClass(); | ||||||
16621 | } | ||||||
16622 | |||||||
16623 | // Exit this scope of this tag's definition. | ||||||
16624 | PopDeclContext(); | ||||||
16625 | |||||||
16626 | if (getCurLexicalContext()->isObjCContainer() && | ||||||
16627 | Tag->getDeclContext()->isFileContext()) | ||||||
16628 | Tag->setTopLevelDeclInObjCContainer(); | ||||||
16629 | |||||||
16630 | // Notify the consumer that we've defined a tag. | ||||||
16631 | if (!Tag->isInvalidDecl()) | ||||||
16632 | Consumer.HandleTagDeclDefinition(Tag); | ||||||
16633 | |||||||
16634 | // Clangs implementation of #pragma align(packed) differs in bitfield layout | ||||||
16635 | // from XLs and instead matches the XL #pragma pack(1) behavior. | ||||||
16636 | if (Context.getTargetInfo().getTriple().isOSAIX() && | ||||||
16637 | AlignPackStack.hasValue()) { | ||||||
16638 | AlignPackInfo APInfo = AlignPackStack.CurrentValue; | ||||||
16639 | // Only diagnose #pragma align(packed). | ||||||
16640 | if (!APInfo.IsAlignAttr() || APInfo.getAlignMode() != AlignPackInfo::Packed) | ||||||
16641 | return; | ||||||
16642 | const RecordDecl *RD = dyn_cast<RecordDecl>(Tag); | ||||||
16643 | if (!RD) | ||||||
16644 | return; | ||||||
16645 | // Only warn if there is at least 1 bitfield member. | ||||||
16646 | if (llvm::any_of(RD->fields(), | ||||||
16647 | [](const FieldDecl *FD) { return FD->isBitField(); })) | ||||||
16648 | Diag(BraceRange.getBegin(), diag::warn_pragma_align_not_xl_compatible); | ||||||
16649 | } | ||||||
16650 | } | ||||||
16651 | |||||||
16652 | void Sema::ActOnObjCContainerFinishDefinition() { | ||||||
16653 | // Exit this scope of this interface definition. | ||||||
16654 | PopDeclContext(); | ||||||
16655 | } | ||||||
16656 | |||||||
16657 | void Sema::ActOnObjCTemporaryExitContainerContext(DeclContext *DC) { | ||||||
16658 | assert(DC == CurContext && "Mismatch of container contexts")(static_cast <bool> (DC == CurContext && "Mismatch of container contexts" ) ? void (0) : __assert_fail ("DC == CurContext && \"Mismatch of container contexts\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16658, __extension__ __PRETTY_FUNCTION__)); | ||||||
16659 | OriginalLexicalContext = DC; | ||||||
16660 | ActOnObjCContainerFinishDefinition(); | ||||||
16661 | } | ||||||
16662 | |||||||
16663 | void Sema::ActOnObjCReenterContainerContext(DeclContext *DC) { | ||||||
16664 | ActOnObjCContainerStartDefinition(cast<Decl>(DC)); | ||||||
16665 | OriginalLexicalContext = nullptr; | ||||||
16666 | } | ||||||
16667 | |||||||
16668 | void Sema::ActOnTagDefinitionError(Scope *S, Decl *TagD) { | ||||||
16669 | AdjustDeclIfTemplate(TagD); | ||||||
16670 | TagDecl *Tag = cast<TagDecl>(TagD); | ||||||
16671 | Tag->setInvalidDecl(); | ||||||
16672 | |||||||
16673 | // Make sure we "complete" the definition even it is invalid. | ||||||
16674 | if (Tag->isBeingDefined()) { | ||||||
16675 | if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) | ||||||
16676 | RD->completeDefinition(); | ||||||
16677 | } | ||||||
16678 | |||||||
16679 | // We're undoing ActOnTagStartDefinition here, not | ||||||
16680 | // ActOnStartCXXMemberDeclarations, so we don't have to mess with | ||||||
16681 | // the FieldCollector. | ||||||
16682 | |||||||
16683 | PopDeclContext(); | ||||||
16684 | } | ||||||
16685 | |||||||
16686 | // Note that FieldName may be null for anonymous bitfields. | ||||||
16687 | ExprResult Sema::VerifyBitField(SourceLocation FieldLoc, | ||||||
16688 | IdentifierInfo *FieldName, | ||||||
16689 | QualType FieldTy, bool IsMsStruct, | ||||||
16690 | Expr *BitWidth, bool *ZeroWidth) { | ||||||
16691 | assert(BitWidth)(static_cast <bool> (BitWidth) ? void (0) : __assert_fail ("BitWidth", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 16691, __extension__ __PRETTY_FUNCTION__)); | ||||||
16692 | if (BitWidth->containsErrors()) | ||||||
16693 | return ExprError(); | ||||||
16694 | |||||||
16695 | // Default to true; that shouldn't confuse checks for emptiness | ||||||
16696 | if (ZeroWidth) | ||||||
16697 | *ZeroWidth = true; | ||||||
16698 | |||||||
16699 | // C99 6.7.2.1p4 - verify the field type. | ||||||
16700 | // C++ 9.6p3: A bit-field shall have integral or enumeration type. | ||||||
16701 | if (!FieldTy->isDependentType() && !FieldTy->isIntegralOrEnumerationType()) { | ||||||
16702 | // Handle incomplete and sizeless types with a specific error. | ||||||
16703 | if (RequireCompleteSizedType(FieldLoc, FieldTy, | ||||||
16704 | diag::err_field_incomplete_or_sizeless)) | ||||||
16705 | return ExprError(); | ||||||
16706 | if (FieldName) | ||||||
16707 | return Diag(FieldLoc, diag::err_not_integral_type_bitfield) | ||||||
16708 | << FieldName << FieldTy << BitWidth->getSourceRange(); | ||||||
16709 | return Diag(FieldLoc, diag::err_not_integral_type_anon_bitfield) | ||||||
16710 | << FieldTy << BitWidth->getSourceRange(); | ||||||
16711 | } else if (DiagnoseUnexpandedParameterPack(const_cast<Expr *>(BitWidth), | ||||||
16712 | UPPC_BitFieldWidth)) | ||||||
16713 | return ExprError(); | ||||||
16714 | |||||||
16715 | // If the bit-width is type- or value-dependent, don't try to check | ||||||
16716 | // it now. | ||||||
16717 | if (BitWidth->isValueDependent() || BitWidth->isTypeDependent()) | ||||||
16718 | return BitWidth; | ||||||
16719 | |||||||
16720 | llvm::APSInt Value; | ||||||
16721 | ExprResult ICE = VerifyIntegerConstantExpression(BitWidth, &Value, AllowFold); | ||||||
16722 | if (ICE.isInvalid()) | ||||||
16723 | return ICE; | ||||||
16724 | BitWidth = ICE.get(); | ||||||
16725 | |||||||
16726 | if (Value != 0 && ZeroWidth) | ||||||
16727 | *ZeroWidth = false; | ||||||
16728 | |||||||
16729 | // Zero-width bitfield is ok for anonymous field. | ||||||
16730 | if (Value == 0 && FieldName) | ||||||
16731 | return Diag(FieldLoc, diag::err_bitfield_has_zero_width) << FieldName; | ||||||
16732 | |||||||
16733 | if (Value.isSigned() && Value.isNegative()) { | ||||||
16734 | if (FieldName) | ||||||
16735 | return Diag(FieldLoc, diag::err_bitfield_has_negative_width) | ||||||
16736 | << FieldName << toString(Value, 10); | ||||||
16737 | return Diag(FieldLoc, diag::err_anon_bitfield_has_negative_width) | ||||||
16738 | << toString(Value, 10); | ||||||
16739 | } | ||||||
16740 | |||||||
16741 | // The size of the bit-field must not exceed our maximum permitted object | ||||||
16742 | // size. | ||||||
16743 | if (Value.getActiveBits() > ConstantArrayType::getMaxSizeBits(Context)) { | ||||||
16744 | return Diag(FieldLoc, diag::err_bitfield_too_wide) | ||||||
16745 | << !FieldName << FieldName << toString(Value, 10); | ||||||
16746 | } | ||||||
16747 | |||||||
16748 | if (!FieldTy->isDependentType()) { | ||||||
16749 | uint64_t TypeStorageSize = Context.getTypeSize(FieldTy); | ||||||
16750 | uint64_t TypeWidth = Context.getIntWidth(FieldTy); | ||||||
16751 | bool BitfieldIsOverwide = Value.ugt(TypeWidth); | ||||||
16752 | |||||||
16753 | // Over-wide bitfields are an error in C or when using the MSVC bitfield | ||||||
16754 | // ABI. | ||||||
16755 | bool CStdConstraintViolation = | ||||||
16756 | BitfieldIsOverwide && !getLangOpts().CPlusPlus; | ||||||
16757 | bool MSBitfieldViolation = | ||||||
16758 | Value.ugt(TypeStorageSize) && | ||||||
16759 | (IsMsStruct || Context.getTargetInfo().getCXXABI().isMicrosoft()); | ||||||
16760 | if (CStdConstraintViolation || MSBitfieldViolation) { | ||||||
16761 | unsigned DiagWidth = | ||||||
16762 | CStdConstraintViolation ? TypeWidth : TypeStorageSize; | ||||||
16763 | return Diag(FieldLoc, diag::err_bitfield_width_exceeds_type_width) | ||||||
16764 | << (bool)FieldName << FieldName << toString(Value, 10) | ||||||
16765 | << !CStdConstraintViolation << DiagWidth; | ||||||
16766 | } | ||||||
16767 | |||||||
16768 | // Warn on types where the user might conceivably expect to get all | ||||||
16769 | // specified bits as value bits: that's all integral types other than | ||||||
16770 | // 'bool'. | ||||||
16771 | if (BitfieldIsOverwide && !FieldTy->isBooleanType() && FieldName) { | ||||||
16772 | Diag(FieldLoc, diag::warn_bitfield_width_exceeds_type_width) | ||||||
16773 | << FieldName << toString(Value, 10) | ||||||
16774 | << (unsigned)TypeWidth; | ||||||
16775 | } | ||||||
16776 | } | ||||||
16777 | |||||||
16778 | return BitWidth; | ||||||
16779 | } | ||||||
16780 | |||||||
16781 | /// ActOnField - Each field of a C struct/union is passed into this in order | ||||||
16782 | /// to create a FieldDecl object for it. | ||||||
16783 | Decl *Sema::ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, | ||||||
16784 | Declarator &D, Expr *BitfieldWidth) { | ||||||
16785 | FieldDecl *Res = HandleField(S, cast_or_null<RecordDecl>(TagD), | ||||||
16786 | DeclStart, D, static_cast<Expr*>(BitfieldWidth), | ||||||
16787 | /*InitStyle=*/ICIS_NoInit, AS_public); | ||||||
16788 | return Res; | ||||||
16789 | } | ||||||
16790 | |||||||
16791 | /// HandleField - Analyze a field of a C struct or a C++ data member. | ||||||
16792 | /// | ||||||
16793 | FieldDecl *Sema::HandleField(Scope *S, RecordDecl *Record, | ||||||
16794 | SourceLocation DeclStart, | ||||||
16795 | Declarator &D, Expr *BitWidth, | ||||||
16796 | InClassInitStyle InitStyle, | ||||||
16797 | AccessSpecifier AS) { | ||||||
16798 | if (D.isDecompositionDeclarator()) { | ||||||
16799 | const DecompositionDeclarator &Decomp = D.getDecompositionDeclarator(); | ||||||
16800 | Diag(Decomp.getLSquareLoc(), diag::err_decomp_decl_context) | ||||||
16801 | << Decomp.getSourceRange(); | ||||||
16802 | return nullptr; | ||||||
16803 | } | ||||||
16804 | |||||||
16805 | IdentifierInfo *II = D.getIdentifier(); | ||||||
16806 | SourceLocation Loc = DeclStart; | ||||||
16807 | if (II) Loc = D.getIdentifierLoc(); | ||||||
16808 | |||||||
16809 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
16810 | QualType T = TInfo->getType(); | ||||||
16811 | if (getLangOpts().CPlusPlus) { | ||||||
16812 | CheckExtraCXXDefaultArguments(D); | ||||||
16813 | |||||||
16814 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||
16815 | UPPC_DataMemberType)) { | ||||||
16816 | D.setInvalidType(); | ||||||
16817 | T = Context.IntTy; | ||||||
16818 | TInfo = Context.getTrivialTypeSourceInfo(T, Loc); | ||||||
16819 | } | ||||||
16820 | } | ||||||
16821 | |||||||
16822 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
16823 | |||||||
16824 | if (D.getDeclSpec().isInlineSpecified()) | ||||||
16825 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
16826 | << getLangOpts().CPlusPlus17; | ||||||
16827 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) | ||||||
16828 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
16829 | diag::err_invalid_thread) | ||||||
16830 | << DeclSpec::getSpecifierName(TSCS); | ||||||
16831 | |||||||
16832 | // Check to see if this name was declared as a member previously | ||||||
16833 | NamedDecl *PrevDecl = nullptr; | ||||||
16834 | LookupResult Previous(*this, II, Loc, LookupMemberName, | ||||||
16835 | ForVisibleRedeclaration); | ||||||
16836 | LookupName(Previous, S); | ||||||
16837 | switch (Previous.getResultKind()) { | ||||||
16838 | case LookupResult::Found: | ||||||
16839 | case LookupResult::FoundUnresolvedValue: | ||||||
16840 | PrevDecl = Previous.getAsSingle<NamedDecl>(); | ||||||
16841 | break; | ||||||
16842 | |||||||
16843 | case LookupResult::FoundOverloaded: | ||||||
16844 | PrevDecl = Previous.getRepresentativeDecl(); | ||||||
16845 | break; | ||||||
16846 | |||||||
16847 | case LookupResult::NotFound: | ||||||
16848 | case LookupResult::NotFoundInCurrentInstantiation: | ||||||
16849 | case LookupResult::Ambiguous: | ||||||
16850 | break; | ||||||
16851 | } | ||||||
16852 | Previous.suppressDiagnostics(); | ||||||
16853 | |||||||
16854 | if (PrevDecl && PrevDecl->isTemplateParameter()) { | ||||||
16855 | // Maybe we will complain about the shadowed template parameter. | ||||||
16856 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||
16857 | // Just pretend that we didn't see the previous declaration. | ||||||
16858 | PrevDecl = nullptr; | ||||||
16859 | } | ||||||
16860 | |||||||
16861 | if (PrevDecl && !isDeclInScope(PrevDecl, Record, S)) | ||||||
16862 | PrevDecl = nullptr; | ||||||
16863 | |||||||
16864 | bool Mutable | ||||||
16865 | = (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_mutable); | ||||||
16866 | SourceLocation TSSL = D.getBeginLoc(); | ||||||
16867 | FieldDecl *NewFD | ||||||
16868 | = CheckFieldDecl(II, T, TInfo, Record, Loc, Mutable, BitWidth, InitStyle, | ||||||
16869 | TSSL, AS, PrevDecl, &D); | ||||||
16870 | |||||||
16871 | if (NewFD->isInvalidDecl()) | ||||||
16872 | Record->setInvalidDecl(); | ||||||
16873 | |||||||
16874 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
16875 | NewFD->setModulePrivate(); | ||||||
16876 | |||||||
16877 | if (NewFD->isInvalidDecl() && PrevDecl) { | ||||||
16878 | // Don't introduce NewFD into scope; there's already something | ||||||
16879 | // with the same name in the same scope. | ||||||
16880 | } else if (II) { | ||||||
16881 | PushOnScopeChains(NewFD, S); | ||||||
16882 | } else | ||||||
16883 | Record->addDecl(NewFD); | ||||||
16884 | |||||||
16885 | return NewFD; | ||||||
16886 | } | ||||||
16887 | |||||||
16888 | /// Build a new FieldDecl and check its well-formedness. | ||||||
16889 | /// | ||||||
16890 | /// This routine builds a new FieldDecl given the fields name, type, | ||||||
16891 | /// record, etc. \p PrevDecl should refer to any previous declaration | ||||||
16892 | /// with the same name and in the same scope as the field to be | ||||||
16893 | /// created. | ||||||
16894 | /// | ||||||
16895 | /// \returns a new FieldDecl. | ||||||
16896 | /// | ||||||
16897 | /// \todo The Declarator argument is a hack. It will be removed once | ||||||
16898 | FieldDecl *Sema::CheckFieldDecl(DeclarationName Name, QualType T, | ||||||
16899 | TypeSourceInfo *TInfo, | ||||||
16900 | RecordDecl *Record, SourceLocation Loc, | ||||||
16901 | bool Mutable, Expr *BitWidth, | ||||||
16902 | InClassInitStyle InitStyle, | ||||||
16903 | SourceLocation TSSL, | ||||||
16904 | AccessSpecifier AS, NamedDecl *PrevDecl, | ||||||
16905 | Declarator *D) { | ||||||
16906 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | ||||||
16907 | bool InvalidDecl = false; | ||||||
16908 | if (D) InvalidDecl = D->isInvalidType(); | ||||||
16909 | |||||||
16910 | // If we receive a broken type, recover by assuming 'int' and | ||||||
16911 | // marking this declaration as invalid. | ||||||
16912 | if (T.isNull() || T->containsErrors()) { | ||||||
16913 | InvalidDecl = true; | ||||||
16914 | T = Context.IntTy; | ||||||
16915 | } | ||||||
16916 | |||||||
16917 | QualType EltTy = Context.getBaseElementType(T); | ||||||
16918 | if (!EltTy->isDependentType() && !EltTy->containsErrors()) { | ||||||
16919 | if (RequireCompleteSizedType(Loc, EltTy, | ||||||
16920 | diag::err_field_incomplete_or_sizeless)) { | ||||||
16921 | // Fields of incomplete type force their record to be invalid. | ||||||
16922 | Record->setInvalidDecl(); | ||||||
16923 | InvalidDecl = true; | ||||||
16924 | } else { | ||||||
16925 | NamedDecl *Def; | ||||||
16926 | EltTy->isIncompleteType(&Def); | ||||||
16927 | if (Def && Def->isInvalidDecl()) { | ||||||
16928 | Record->setInvalidDecl(); | ||||||
16929 | InvalidDecl = true; | ||||||
16930 | } | ||||||
16931 | } | ||||||
16932 | } | ||||||
16933 | |||||||
16934 | // TR 18037 does not allow fields to be declared with address space | ||||||
16935 | if (T.hasAddressSpace() || T->isDependentAddressSpaceType() || | ||||||
16936 | T->getBaseElementTypeUnsafe()->isDependentAddressSpaceType()) { | ||||||
16937 | Diag(Loc, diag::err_field_with_address_space); | ||||||
16938 | Record->setInvalidDecl(); | ||||||
16939 | InvalidDecl = true; | ||||||
16940 | } | ||||||
16941 | |||||||
16942 | if (LangOpts.OpenCL) { | ||||||
16943 | // OpenCL v1.2 s6.9b,r & OpenCL v2.0 s6.12.5 - The following types cannot be | ||||||
16944 | // used as structure or union field: image, sampler, event or block types. | ||||||
16945 | if (T->isEventT() || T->isImageType() || T->isSamplerT() || | ||||||
16946 | T->isBlockPointerType()) { | ||||||
16947 | Diag(Loc, diag::err_opencl_type_struct_or_union_field) << T; | ||||||
16948 | Record->setInvalidDecl(); | ||||||
16949 | InvalidDecl = true; | ||||||
16950 | } | ||||||
16951 | // OpenCL v1.2 s6.9.c: bitfields are not supported, unless Clang extension | ||||||
16952 | // is enabled. | ||||||
16953 | if (BitWidth && !getOpenCLOptions().isAvailableOption( | ||||||
16954 | "__cl_clang_bitfields", LangOpts)) { | ||||||
16955 | Diag(Loc, diag::err_opencl_bitfields); | ||||||
16956 | InvalidDecl = true; | ||||||
16957 | } | ||||||
16958 | } | ||||||
16959 | |||||||
16960 | // Anonymous bit-fields cannot be cv-qualified (CWG 2229). | ||||||
16961 | if (!InvalidDecl && getLangOpts().CPlusPlus && !II && BitWidth && | ||||||
16962 | T.hasQualifiers()) { | ||||||
16963 | InvalidDecl = true; | ||||||
16964 | Diag(Loc, diag::err_anon_bitfield_qualifiers); | ||||||
16965 | } | ||||||
16966 | |||||||
16967 | // C99 6.7.2.1p8: A member of a structure or union may have any type other | ||||||
16968 | // than a variably modified type. | ||||||
16969 | if (!InvalidDecl && T->isVariablyModifiedType()) { | ||||||
16970 | if (!tryToFixVariablyModifiedVarType( | ||||||
16971 | TInfo, T, Loc, diag::err_typecheck_field_variable_size)) | ||||||
16972 | InvalidDecl = true; | ||||||
16973 | } | ||||||
16974 | |||||||
16975 | // Fields can not have abstract class types | ||||||
16976 | if (!InvalidDecl && RequireNonAbstractType(Loc, T, | ||||||
16977 | diag::err_abstract_type_in_decl, | ||||||
16978 | AbstractFieldType)) | ||||||
16979 | InvalidDecl = true; | ||||||
16980 | |||||||
16981 | bool ZeroWidth = false; | ||||||
16982 | if (InvalidDecl) | ||||||
16983 | BitWidth = nullptr; | ||||||
16984 | // If this is declared as a bit-field, check the bit-field. | ||||||
16985 | if (BitWidth) { | ||||||
16986 | BitWidth = VerifyBitField(Loc, II, T, Record->isMsStruct(Context), BitWidth, | ||||||
16987 | &ZeroWidth).get(); | ||||||
16988 | if (!BitWidth) { | ||||||
16989 | InvalidDecl = true; | ||||||
16990 | BitWidth = nullptr; | ||||||
16991 | ZeroWidth = false; | ||||||
16992 | } | ||||||
16993 | } | ||||||
16994 | |||||||
16995 | // Check that 'mutable' is consistent with the type of the declaration. | ||||||
16996 | if (!InvalidDecl && Mutable) { | ||||||
16997 | unsigned DiagID = 0; | ||||||
16998 | if (T->isReferenceType()) | ||||||
16999 | DiagID = getLangOpts().MSVCCompat ? diag::ext_mutable_reference | ||||||
17000 | : diag::err_mutable_reference; | ||||||
17001 | else if (T.isConstQualified()) | ||||||
17002 | DiagID = diag::err_mutable_const; | ||||||
17003 | |||||||
17004 | if (DiagID) { | ||||||
17005 | SourceLocation ErrLoc = Loc; | ||||||
17006 | if (D && D->getDeclSpec().getStorageClassSpecLoc().isValid()) | ||||||
17007 | ErrLoc = D->getDeclSpec().getStorageClassSpecLoc(); | ||||||
17008 | Diag(ErrLoc, DiagID); | ||||||
17009 | if (DiagID != diag::ext_mutable_reference) { | ||||||
17010 | Mutable = false; | ||||||
17011 | InvalidDecl = true; | ||||||
17012 | } | ||||||
17013 | } | ||||||
17014 | } | ||||||
17015 | |||||||
17016 | // C++11 [class.union]p8 (DR1460): | ||||||
17017 | // At most one variant member of a union may have a | ||||||
17018 | // brace-or-equal-initializer. | ||||||
17019 | if (InitStyle != ICIS_NoInit) | ||||||
17020 | checkDuplicateDefaultInit(*this, cast<CXXRecordDecl>(Record), Loc); | ||||||
17021 | |||||||
17022 | FieldDecl *NewFD = FieldDecl::Create(Context, Record, TSSL, Loc, II, T, TInfo, | ||||||
17023 | BitWidth, Mutable, InitStyle); | ||||||
17024 | if (InvalidDecl) | ||||||
17025 | NewFD->setInvalidDecl(); | ||||||
17026 | |||||||
17027 | if (PrevDecl && !isa<TagDecl>(PrevDecl)) { | ||||||
17028 | Diag(Loc, diag::err_duplicate_member) << II; | ||||||
17029 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
17030 | NewFD->setInvalidDecl(); | ||||||
17031 | } | ||||||
17032 | |||||||
17033 | if (!InvalidDecl && getLangOpts().CPlusPlus) { | ||||||
17034 | if (Record->isUnion()) { | ||||||
17035 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { | ||||||
17036 | CXXRecordDecl* RDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
17037 | if (RDecl->getDefinition()) { | ||||||
17038 | // C++ [class.union]p1: An object of a class with a non-trivial | ||||||
17039 | // constructor, a non-trivial copy constructor, a non-trivial | ||||||
17040 | // destructor, or a non-trivial copy assignment operator | ||||||
17041 | // cannot be a member of a union, nor can an array of such | ||||||
17042 | // objects. | ||||||
17043 | if (CheckNontrivialField(NewFD)) | ||||||
17044 | NewFD->setInvalidDecl(); | ||||||
17045 | } | ||||||
17046 | } | ||||||
17047 | |||||||
17048 | // C++ [class.union]p1: If a union contains a member of reference type, | ||||||
17049 | // the program is ill-formed, except when compiling with MSVC extensions | ||||||
17050 | // enabled. | ||||||
17051 | if (EltTy->isReferenceType()) { | ||||||
17052 | Diag(NewFD->getLocation(), getLangOpts().MicrosoftExt ? | ||||||
17053 | diag::ext_union_member_of_reference_type : | ||||||
17054 | diag::err_union_member_of_reference_type) | ||||||
17055 | << NewFD->getDeclName() << EltTy; | ||||||
17056 | if (!getLangOpts().MicrosoftExt) | ||||||
17057 | NewFD->setInvalidDecl(); | ||||||
17058 | } | ||||||
17059 | } | ||||||
17060 | } | ||||||
17061 | |||||||
17062 | // FIXME: We need to pass in the attributes given an AST | ||||||
17063 | // representation, not a parser representation. | ||||||
17064 | if (D) { | ||||||
17065 | // FIXME: The current scope is almost... but not entirely... correct here. | ||||||
17066 | ProcessDeclAttributes(getCurScope(), NewFD, *D); | ||||||
17067 | |||||||
17068 | if (NewFD->hasAttrs()) | ||||||
17069 | CheckAlignasUnderalignment(NewFD); | ||||||
17070 | } | ||||||
17071 | |||||||
17072 | // In auto-retain/release, infer strong retension for fields of | ||||||
17073 | // retainable type. | ||||||
17074 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewFD)) | ||||||
17075 | NewFD->setInvalidDecl(); | ||||||
17076 | |||||||
17077 | if (T.isObjCGCWeak()) | ||||||
17078 | Diag(Loc, diag::warn_attribute_weak_on_field); | ||||||
17079 | |||||||
17080 | // PPC MMA non-pointer types are not allowed as field types. | ||||||
17081 | if (Context.getTargetInfo().getTriple().isPPC64() && | ||||||
17082 | CheckPPCMMAType(T, NewFD->getLocation())) | ||||||
17083 | NewFD->setInvalidDecl(); | ||||||
17084 | |||||||
17085 | NewFD->setAccess(AS); | ||||||
17086 | return NewFD; | ||||||
17087 | } | ||||||
17088 | |||||||
17089 | bool Sema::CheckNontrivialField(FieldDecl *FD) { | ||||||
17090 | assert(FD)(static_cast <bool> (FD) ? void (0) : __assert_fail ("FD" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17090, __extension__ __PRETTY_FUNCTION__)); | ||||||
17091 | assert(getLangOpts().CPlusPlus && "valid check only for C++")(static_cast <bool> (getLangOpts().CPlusPlus && "valid check only for C++") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"valid check only for C++\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17091, __extension__ __PRETTY_FUNCTION__)); | ||||||
17092 | |||||||
17093 | if (FD->isInvalidDecl() || FD->getType()->isDependentType()) | ||||||
17094 | return false; | ||||||
17095 | |||||||
17096 | QualType EltTy = Context.getBaseElementType(FD->getType()); | ||||||
17097 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { | ||||||
17098 | CXXRecordDecl *RDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
17099 | if (RDecl->getDefinition()) { | ||||||
17100 | // We check for copy constructors before constructors | ||||||
17101 | // because otherwise we'll never get complaints about | ||||||
17102 | // copy constructors. | ||||||
17103 | |||||||
17104 | CXXSpecialMember member = CXXInvalid; | ||||||
17105 | // We're required to check for any non-trivial constructors. Since the | ||||||
17106 | // implicit default constructor is suppressed if there are any | ||||||
17107 | // user-declared constructors, we just need to check that there is a | ||||||
17108 | // trivial default constructor and a trivial copy constructor. (We don't | ||||||
17109 | // worry about move constructors here, since this is a C++98 check.) | ||||||
17110 | if (RDecl->hasNonTrivialCopyConstructor()) | ||||||
17111 | member = CXXCopyConstructor; | ||||||
17112 | else if (!RDecl->hasTrivialDefaultConstructor()) | ||||||
17113 | member = CXXDefaultConstructor; | ||||||
17114 | else if (RDecl->hasNonTrivialCopyAssignment()) | ||||||
17115 | member = CXXCopyAssignment; | ||||||
17116 | else if (RDecl->hasNonTrivialDestructor()) | ||||||
17117 | member = CXXDestructor; | ||||||
17118 | |||||||
17119 | if (member != CXXInvalid) { | ||||||
17120 | if (!getLangOpts().CPlusPlus11 && | ||||||
17121 | getLangOpts().ObjCAutoRefCount && RDecl->hasObjectMember()) { | ||||||
17122 | // Objective-C++ ARC: it is an error to have a non-trivial field of | ||||||
17123 | // a union. However, system headers in Objective-C programs | ||||||
17124 | // occasionally have Objective-C lifetime objects within unions, | ||||||
17125 | // and rather than cause the program to fail, we make those | ||||||
17126 | // members unavailable. | ||||||
17127 | SourceLocation Loc = FD->getLocation(); | ||||||
17128 | if (getSourceManager().isInSystemHeader(Loc)) { | ||||||
17129 | if (!FD->hasAttr<UnavailableAttr>()) | ||||||
17130 | FD->addAttr(UnavailableAttr::CreateImplicit(Context, "", | ||||||
17131 | UnavailableAttr::IR_ARCFieldWithOwnership, Loc)); | ||||||
17132 | return false; | ||||||
17133 | } | ||||||
17134 | } | ||||||
17135 | |||||||
17136 | Diag(FD->getLocation(), getLangOpts().CPlusPlus11 ? | ||||||
17137 | diag::warn_cxx98_compat_nontrivial_union_or_anon_struct_member : | ||||||
17138 | diag::err_illegal_union_or_anon_struct_member) | ||||||
17139 | << FD->getParent()->isUnion() << FD->getDeclName() << member; | ||||||
17140 | DiagnoseNontrivial(RDecl, member); | ||||||
17141 | return !getLangOpts().CPlusPlus11; | ||||||
17142 | } | ||||||
17143 | } | ||||||
17144 | } | ||||||
17145 | |||||||
17146 | return false; | ||||||
17147 | } | ||||||
17148 | |||||||
17149 | /// TranslateIvarVisibility - Translate visibility from a token ID to an | ||||||
17150 | /// AST enum value. | ||||||
17151 | static ObjCIvarDecl::AccessControl | ||||||
17152 | TranslateIvarVisibility(tok::ObjCKeywordKind ivarVisibility) { | ||||||
17153 | switch (ivarVisibility) { | ||||||
17154 | default: llvm_unreachable("Unknown visitibility kind")::llvm::llvm_unreachable_internal("Unknown visitibility kind" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17154); | ||||||
17155 | case tok::objc_private: return ObjCIvarDecl::Private; | ||||||
17156 | case tok::objc_public: return ObjCIvarDecl::Public; | ||||||
17157 | case tok::objc_protected: return ObjCIvarDecl::Protected; | ||||||
17158 | case tok::objc_package: return ObjCIvarDecl::Package; | ||||||
17159 | } | ||||||
17160 | } | ||||||
17161 | |||||||
17162 | /// ActOnIvar - Each ivar field of an objective-c class is passed into this | ||||||
17163 | /// in order to create an IvarDecl object for it. | ||||||
17164 | Decl *Sema::ActOnIvar(Scope *S, | ||||||
17165 | SourceLocation DeclStart, | ||||||
17166 | Declarator &D, Expr *BitfieldWidth, | ||||||
17167 | tok::ObjCKeywordKind Visibility) { | ||||||
17168 | |||||||
17169 | IdentifierInfo *II = D.getIdentifier(); | ||||||
17170 | Expr *BitWidth = (Expr*)BitfieldWidth; | ||||||
17171 | SourceLocation Loc = DeclStart; | ||||||
17172 | if (II) Loc = D.getIdentifierLoc(); | ||||||
17173 | |||||||
17174 | // FIXME: Unnamed fields can be handled in various different ways, for | ||||||
17175 | // example, unnamed unions inject all members into the struct namespace! | ||||||
17176 | |||||||
17177 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
17178 | QualType T = TInfo->getType(); | ||||||
17179 | |||||||
17180 | if (BitWidth) { | ||||||
17181 | // 6.7.2.1p3, 6.7.2.1p4 | ||||||
17182 | BitWidth = VerifyBitField(Loc, II, T, /*IsMsStruct*/false, BitWidth).get(); | ||||||
17183 | if (!BitWidth) | ||||||
17184 | D.setInvalidType(); | ||||||
17185 | } else { | ||||||
17186 | // Not a bitfield. | ||||||
17187 | |||||||
17188 | // validate II. | ||||||
17189 | |||||||
17190 | } | ||||||
17191 | if (T->isReferenceType()) { | ||||||
17192 | Diag(Loc, diag::err_ivar_reference_type); | ||||||
17193 | D.setInvalidType(); | ||||||
17194 | } | ||||||
17195 | // C99 6.7.2.1p8: A member of a structure or union may have any type other | ||||||
17196 | // than a variably modified type. | ||||||
17197 | else if (T->isVariablyModifiedType()) { | ||||||
17198 | if (!tryToFixVariablyModifiedVarType( | ||||||
17199 | TInfo, T, Loc, diag::err_typecheck_ivar_variable_size)) | ||||||
17200 | D.setInvalidType(); | ||||||
17201 | } | ||||||
17202 | |||||||
17203 | // Get the visibility (access control) for this ivar. | ||||||
17204 | ObjCIvarDecl::AccessControl ac = | ||||||
17205 | Visibility != tok::objc_not_keyword ? TranslateIvarVisibility(Visibility) | ||||||
17206 | : ObjCIvarDecl::None; | ||||||
17207 | // Must set ivar's DeclContext to its enclosing interface. | ||||||
17208 | ObjCContainerDecl *EnclosingDecl = cast<ObjCContainerDecl>(CurContext); | ||||||
17209 | if (!EnclosingDecl || EnclosingDecl->isInvalidDecl()) | ||||||
17210 | return nullptr; | ||||||
17211 | ObjCContainerDecl *EnclosingContext; | ||||||
17212 | if (ObjCImplementationDecl *IMPDecl = | ||||||
17213 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { | ||||||
17214 | if (LangOpts.ObjCRuntime.isFragile()) { | ||||||
17215 | // Case of ivar declared in an implementation. Context is that of its class. | ||||||
17216 | EnclosingContext = IMPDecl->getClassInterface(); | ||||||
17217 | assert(EnclosingContext && "Implementation has no class interface!")(static_cast <bool> (EnclosingContext && "Implementation has no class interface!" ) ? void (0) : __assert_fail ("EnclosingContext && \"Implementation has no class interface!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17217, __extension__ __PRETTY_FUNCTION__)); | ||||||
17218 | } | ||||||
17219 | else | ||||||
17220 | EnclosingContext = EnclosingDecl; | ||||||
17221 | } else { | ||||||
17222 | if (ObjCCategoryDecl *CDecl = | ||||||
17223 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { | ||||||
17224 | if (LangOpts.ObjCRuntime.isFragile() || !CDecl->IsClassExtension()) { | ||||||
17225 | Diag(Loc, diag::err_misplaced_ivar) << CDecl->IsClassExtension(); | ||||||
17226 | return nullptr; | ||||||
17227 | } | ||||||
17228 | } | ||||||
17229 | EnclosingContext = EnclosingDecl; | ||||||
17230 | } | ||||||
17231 | |||||||
17232 | // Construct the decl. | ||||||
17233 | ObjCIvarDecl *NewID = ObjCIvarDecl::Create(Context, EnclosingContext, | ||||||
17234 | DeclStart, Loc, II, T, | ||||||
17235 | TInfo, ac, (Expr *)BitfieldWidth); | ||||||
17236 | |||||||
17237 | if (II) { | ||||||
17238 | NamedDecl *PrevDecl = LookupSingleName(S, II, Loc, LookupMemberName, | ||||||
17239 | ForVisibleRedeclaration); | ||||||
17240 | if (PrevDecl && isDeclInScope(PrevDecl, EnclosingContext, S) | ||||||
17241 | && !isa<TagDecl>(PrevDecl)) { | ||||||
17242 | Diag(Loc, diag::err_duplicate_member) << II; | ||||||
17243 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
17244 | NewID->setInvalidDecl(); | ||||||
17245 | } | ||||||
17246 | } | ||||||
17247 | |||||||
17248 | // Process attributes attached to the ivar. | ||||||
17249 | ProcessDeclAttributes(S, NewID, D); | ||||||
17250 | |||||||
17251 | if (D.isInvalidType()) | ||||||
17252 | NewID->setInvalidDecl(); | ||||||
17253 | |||||||
17254 | // In ARC, infer 'retaining' for ivars of retainable type. | ||||||
17255 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewID)) | ||||||
17256 | NewID->setInvalidDecl(); | ||||||
17257 | |||||||
17258 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
17259 | NewID->setModulePrivate(); | ||||||
17260 | |||||||
17261 | if (II) { | ||||||
17262 | // FIXME: When interfaces are DeclContexts, we'll need to add | ||||||
17263 | // these to the interface. | ||||||
17264 | S->AddDecl(NewID); | ||||||
17265 | IdResolver.AddDecl(NewID); | ||||||
17266 | } | ||||||
17267 | |||||||
17268 | if (LangOpts.ObjCRuntime.isNonFragile() && | ||||||
17269 | !NewID->isInvalidDecl() && isa<ObjCInterfaceDecl>(EnclosingDecl)) | ||||||
17270 | Diag(Loc, diag::warn_ivars_in_interface); | ||||||
17271 | |||||||
17272 | return NewID; | ||||||
17273 | } | ||||||
17274 | |||||||
17275 | /// ActOnLastBitfield - This routine handles synthesized bitfields rules for | ||||||
17276 | /// class and class extensions. For every class \@interface and class | ||||||
17277 | /// extension \@interface, if the last ivar is a bitfield of any type, | ||||||
17278 | /// then add an implicit `char :0` ivar to the end of that interface. | ||||||
17279 | void Sema::ActOnLastBitfield(SourceLocation DeclLoc, | ||||||
17280 | SmallVectorImpl<Decl *> &AllIvarDecls) { | ||||||
17281 | if (LangOpts.ObjCRuntime.isFragile() || AllIvarDecls.empty()) | ||||||
17282 | return; | ||||||
17283 | |||||||
17284 | Decl *ivarDecl = AllIvarDecls[AllIvarDecls.size()-1]; | ||||||
17285 | ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(ivarDecl); | ||||||
17286 | |||||||
17287 | if (!Ivar->isBitField() || Ivar->isZeroLengthBitField(Context)) | ||||||
17288 | return; | ||||||
17289 | ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CurContext); | ||||||
17290 | if (!ID) { | ||||||
17291 | if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(CurContext)) { | ||||||
17292 | if (!CD->IsClassExtension()) | ||||||
17293 | return; | ||||||
17294 | } | ||||||
17295 | // No need to add this to end of @implementation. | ||||||
17296 | else | ||||||
17297 | return; | ||||||
17298 | } | ||||||
17299 | // All conditions are met. Add a new bitfield to the tail end of ivars. | ||||||
17300 | llvm::APInt Zero(Context.getTypeSize(Context.IntTy), 0); | ||||||
17301 | Expr * BW = IntegerLiteral::Create(Context, Zero, Context.IntTy, DeclLoc); | ||||||
17302 | |||||||
17303 | Ivar = ObjCIvarDecl::Create(Context, cast<ObjCContainerDecl>(CurContext), | ||||||
17304 | DeclLoc, DeclLoc, nullptr, | ||||||
17305 | Context.CharTy, | ||||||
17306 | Context.getTrivialTypeSourceInfo(Context.CharTy, | ||||||
17307 | DeclLoc), | ||||||
17308 | ObjCIvarDecl::Private, BW, | ||||||
17309 | true); | ||||||
17310 | AllIvarDecls.push_back(Ivar); | ||||||
17311 | } | ||||||
17312 | |||||||
17313 | void Sema::ActOnFields(Scope *S, SourceLocation RecLoc, Decl *EnclosingDecl, | ||||||
17314 | ArrayRef<Decl *> Fields, SourceLocation LBrac, | ||||||
17315 | SourceLocation RBrac, | ||||||
17316 | const ParsedAttributesView &Attrs) { | ||||||
17317 | assert(EnclosingDecl && "missing record or interface decl")(static_cast <bool> (EnclosingDecl && "missing record or interface decl" ) ? void (0) : __assert_fail ("EnclosingDecl && \"missing record or interface decl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17317, __extension__ __PRETTY_FUNCTION__)); | ||||||
17318 | |||||||
17319 | // If this is an Objective-C @implementation or category and we have | ||||||
17320 | // new fields here we should reset the layout of the interface since | ||||||
17321 | // it will now change. | ||||||
17322 | if (!Fields.empty() && isa<ObjCContainerDecl>(EnclosingDecl)) { | ||||||
17323 | ObjCContainerDecl *DC = cast<ObjCContainerDecl>(EnclosingDecl); | ||||||
17324 | switch (DC->getKind()) { | ||||||
17325 | default: break; | ||||||
17326 | case Decl::ObjCCategory: | ||||||
17327 | Context.ResetObjCLayout(cast<ObjCCategoryDecl>(DC)->getClassInterface()); | ||||||
17328 | break; | ||||||
17329 | case Decl::ObjCImplementation: | ||||||
17330 | Context. | ||||||
17331 | ResetObjCLayout(cast<ObjCImplementationDecl>(DC)->getClassInterface()); | ||||||
17332 | break; | ||||||
17333 | } | ||||||
17334 | } | ||||||
17335 | |||||||
17336 | RecordDecl *Record = dyn_cast<RecordDecl>(EnclosingDecl); | ||||||
17337 | CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(EnclosingDecl); | ||||||
17338 | |||||||
17339 | // Start counting up the number of named members; make sure to include | ||||||
17340 | // members of anonymous structs and unions in the total. | ||||||
17341 | unsigned NumNamedMembers = 0; | ||||||
17342 | if (Record) { | ||||||
17343 | for (const auto *I : Record->decls()) { | ||||||
17344 | if (const auto *IFD = dyn_cast<IndirectFieldDecl>(I)) | ||||||
17345 | if (IFD->getDeclName()) | ||||||
17346 | ++NumNamedMembers; | ||||||
17347 | } | ||||||
17348 | } | ||||||
17349 | |||||||
17350 | // Verify that all the fields are okay. | ||||||
17351 | SmallVector<FieldDecl*, 32> RecFields; | ||||||
17352 | |||||||
17353 | for (ArrayRef<Decl *>::iterator i = Fields.begin(), end = Fields.end(); | ||||||
17354 | i != end; ++i) { | ||||||
17355 | FieldDecl *FD = cast<FieldDecl>(*i); | ||||||
17356 | |||||||
17357 | // Get the type for the field. | ||||||
17358 | const Type *FDTy = FD->getType().getTypePtr(); | ||||||
17359 | |||||||
17360 | if (!FD->isAnonymousStructOrUnion()) { | ||||||
17361 | // Remember all fields written by the user. | ||||||
17362 | RecFields.push_back(FD); | ||||||
17363 | } | ||||||
17364 | |||||||
17365 | // If the field is already invalid for some reason, don't emit more | ||||||
17366 | // diagnostics about it. | ||||||
17367 | if (FD->isInvalidDecl()) { | ||||||
17368 | EnclosingDecl->setInvalidDecl(); | ||||||
17369 | continue; | ||||||
17370 | } | ||||||
17371 | |||||||
17372 | // C99 6.7.2.1p2: | ||||||
17373 | // A structure or union shall not contain a member with | ||||||
17374 | // incomplete or function type (hence, a structure shall not | ||||||
17375 | // contain an instance of itself, but may contain a pointer to | ||||||
17376 | // an instance of itself), except that the last member of a | ||||||
17377 | // structure with more than one named member may have incomplete | ||||||
17378 | // array type; such a structure (and any union containing, | ||||||
17379 | // possibly recursively, a member that is such a structure) | ||||||
17380 | // shall not be a member of a structure or an element of an | ||||||
17381 | // array. | ||||||
17382 | bool IsLastField = (i + 1 == Fields.end()); | ||||||
17383 | if (FDTy->isFunctionType()) { | ||||||
17384 | // Field declared as a function. | ||||||
17385 | Diag(FD->getLocation(), diag::err_field_declared_as_function) | ||||||
17386 | << FD->getDeclName(); | ||||||
17387 | FD->setInvalidDecl(); | ||||||
17388 | EnclosingDecl->setInvalidDecl(); | ||||||
17389 | continue; | ||||||
17390 | } else if (FDTy->isIncompleteArrayType() && | ||||||
17391 | (Record || isa<ObjCContainerDecl>(EnclosingDecl))) { | ||||||
17392 | if (Record) { | ||||||
17393 | // Flexible array member. | ||||||
17394 | // Microsoft and g++ is more permissive regarding flexible array. | ||||||
17395 | // It will accept flexible array in union and also | ||||||
17396 | // as the sole element of a struct/class. | ||||||
17397 | unsigned DiagID = 0; | ||||||
17398 | if (!Record->isUnion() && !IsLastField) { | ||||||
17399 | Diag(FD->getLocation(), diag::err_flexible_array_not_at_end) | ||||||
17400 | << FD->getDeclName() << FD->getType() << Record->getTagKind(); | ||||||
17401 | Diag((*(i + 1))->getLocation(), diag::note_next_field_declaration); | ||||||
17402 | FD->setInvalidDecl(); | ||||||
17403 | EnclosingDecl->setInvalidDecl(); | ||||||
17404 | continue; | ||||||
17405 | } else if (Record->isUnion()) | ||||||
17406 | DiagID = getLangOpts().MicrosoftExt | ||||||
17407 | ? diag::ext_flexible_array_union_ms | ||||||
17408 | : getLangOpts().CPlusPlus | ||||||
17409 | ? diag::ext_flexible_array_union_gnu | ||||||
17410 | : diag::err_flexible_array_union; | ||||||
17411 | else if (NumNamedMembers < 1) | ||||||
17412 | DiagID = getLangOpts().MicrosoftExt | ||||||
17413 | ? diag::ext_flexible_array_empty_aggregate_ms | ||||||
17414 | : getLangOpts().CPlusPlus | ||||||
17415 | ? diag::ext_flexible_array_empty_aggregate_gnu | ||||||
17416 | : diag::err_flexible_array_empty_aggregate; | ||||||
17417 | |||||||
17418 | if (DiagID) | ||||||
17419 | Diag(FD->getLocation(), DiagID) << FD->getDeclName() | ||||||
17420 | << Record->getTagKind(); | ||||||
17421 | // While the layout of types that contain virtual bases is not specified | ||||||
17422 | // by the C++ standard, both the Itanium and Microsoft C++ ABIs place | ||||||
17423 | // virtual bases after the derived members. This would make a flexible | ||||||
17424 | // array member declared at the end of an object not adjacent to the end | ||||||
17425 | // of the type. | ||||||
17426 | if (CXXRecord && CXXRecord->getNumVBases() != 0) | ||||||
17427 | Diag(FD->getLocation(), diag::err_flexible_array_virtual_base) | ||||||
17428 | << FD->getDeclName() << Record->getTagKind(); | ||||||
17429 | if (!getLangOpts().C99) | ||||||
17430 | Diag(FD->getLocation(), diag::ext_c99_flexible_array_member) | ||||||
17431 | << FD->getDeclName() << Record->getTagKind(); | ||||||
17432 | |||||||
17433 | // If the element type has a non-trivial destructor, we would not | ||||||
17434 | // implicitly destroy the elements, so disallow it for now. | ||||||
17435 | // | ||||||
17436 | // FIXME: GCC allows this. We should probably either implicitly delete | ||||||
17437 | // the destructor of the containing class, or just allow this. | ||||||
17438 | QualType BaseElem = Context.getBaseElementType(FD->getType()); | ||||||
17439 | if (!BaseElem->isDependentType() && BaseElem.isDestructedType()) { | ||||||
17440 | Diag(FD->getLocation(), diag::err_flexible_array_has_nontrivial_dtor) | ||||||
17441 | << FD->getDeclName() << FD->getType(); | ||||||
17442 | FD->setInvalidDecl(); | ||||||
17443 | EnclosingDecl->setInvalidDecl(); | ||||||
17444 | continue; | ||||||
17445 | } | ||||||
17446 | // Okay, we have a legal flexible array member at the end of the struct. | ||||||
17447 | Record->setHasFlexibleArrayMember(true); | ||||||
17448 | } else { | ||||||
17449 | // In ObjCContainerDecl ivars with incomplete array type are accepted, | ||||||
17450 | // unless they are followed by another ivar. That check is done | ||||||
17451 | // elsewhere, after synthesized ivars are known. | ||||||
17452 | } | ||||||
17453 | } else if (!FDTy->isDependentType() && | ||||||
17454 | RequireCompleteSizedType( | ||||||
17455 | FD->getLocation(), FD->getType(), | ||||||
17456 | diag::err_field_incomplete_or_sizeless)) { | ||||||
17457 | // Incomplete type | ||||||
17458 | FD->setInvalidDecl(); | ||||||
17459 | EnclosingDecl->setInvalidDecl(); | ||||||
17460 | continue; | ||||||
17461 | } else if (const RecordType *FDTTy = FDTy->getAs<RecordType>()) { | ||||||
17462 | if (Record && FDTTy->getDecl()->hasFlexibleArrayMember()) { | ||||||
17463 | // A type which contains a flexible array member is considered to be a | ||||||
17464 | // flexible array member. | ||||||
17465 | Record->setHasFlexibleArrayMember(true); | ||||||
17466 | if (!Record->isUnion()) { | ||||||
17467 | // If this is a struct/class and this is not the last element, reject | ||||||
17468 | // it. Note that GCC supports variable sized arrays in the middle of | ||||||
17469 | // structures. | ||||||
17470 | if (!IsLastField) | ||||||
17471 | Diag(FD->getLocation(), diag::ext_variable_sized_type_in_struct) | ||||||
17472 | << FD->getDeclName() << FD->getType(); | ||||||
17473 | else { | ||||||
17474 | // We support flexible arrays at the end of structs in | ||||||
17475 | // other structs as an extension. | ||||||
17476 | Diag(FD->getLocation(), diag::ext_flexible_array_in_struct) | ||||||
17477 | << FD->getDeclName(); | ||||||
17478 | } | ||||||
17479 | } | ||||||
17480 | } | ||||||
17481 | if (isa<ObjCContainerDecl>(EnclosingDecl) && | ||||||
17482 | RequireNonAbstractType(FD->getLocation(), FD->getType(), | ||||||
17483 | diag::err_abstract_type_in_decl, | ||||||
17484 | AbstractIvarType)) { | ||||||
17485 | // Ivars can not have abstract class types | ||||||
17486 | FD->setInvalidDecl(); | ||||||
17487 | } | ||||||
17488 | if (Record && FDTTy->getDecl()->hasObjectMember()) | ||||||
17489 | Record->setHasObjectMember(true); | ||||||
17490 | if (Record && FDTTy->getDecl()->hasVolatileMember()) | ||||||
17491 | Record->setHasVolatileMember(true); | ||||||
17492 | } else if (FDTy->isObjCObjectType()) { | ||||||
17493 | /// A field cannot be an Objective-c object | ||||||
17494 | Diag(FD->getLocation(), diag::err_statically_allocated_object) | ||||||
17495 | << FixItHint::CreateInsertion(FD->getLocation(), "*"); | ||||||
17496 | QualType T = Context.getObjCObjectPointerType(FD->getType()); | ||||||
17497 | FD->setType(T); | ||||||
17498 | } else if (Record && Record->isUnion() && | ||||||
17499 | FD->getType().hasNonTrivialObjCLifetime() && | ||||||
17500 | getSourceManager().isInSystemHeader(FD->getLocation()) && | ||||||
17501 | !getLangOpts().CPlusPlus && !FD->hasAttr<UnavailableAttr>() && | ||||||
17502 | (FD->getType().getObjCLifetime() != Qualifiers::OCL_Strong || | ||||||
17503 | !Context.hasDirectOwnershipQualifier(FD->getType()))) { | ||||||
17504 | // For backward compatibility, fields of C unions declared in system | ||||||
17505 | // headers that have non-trivial ObjC ownership qualifications are marked | ||||||
17506 | // as unavailable unless the qualifier is explicit and __strong. This can | ||||||
17507 | // break ABI compatibility between programs compiled with ARC and MRR, but | ||||||
17508 | // is a better option than rejecting programs using those unions under | ||||||
17509 | // ARC. | ||||||
17510 | FD->addAttr(UnavailableAttr::CreateImplicit( | ||||||
17511 | Context, "", UnavailableAttr::IR_ARCFieldWithOwnership, | ||||||
17512 | FD->getLocation())); | ||||||
17513 | } else if (getLangOpts().ObjC && | ||||||
17514 | getLangOpts().getGC() != LangOptions::NonGC && Record && | ||||||
17515 | !Record->hasObjectMember()) { | ||||||
17516 | if (FD->getType()->isObjCObjectPointerType() || | ||||||
17517 | FD->getType().isObjCGCStrong()) | ||||||
17518 | Record->setHasObjectMember(true); | ||||||
17519 | else if (Context.getAsArrayType(FD->getType())) { | ||||||
17520 | QualType BaseType = Context.getBaseElementType(FD->getType()); | ||||||
17521 | if (BaseType->isRecordType() && | ||||||
17522 | BaseType->castAs<RecordType>()->getDecl()->hasObjectMember()) | ||||||
17523 | Record->setHasObjectMember(true); | ||||||
17524 | else if (BaseType->isObjCObjectPointerType() || | ||||||
17525 | BaseType.isObjCGCStrong()) | ||||||
17526 | Record->setHasObjectMember(true); | ||||||
17527 | } | ||||||
17528 | } | ||||||
17529 | |||||||
17530 | if (Record && !getLangOpts().CPlusPlus && | ||||||
17531 | !shouldIgnoreForRecordTriviality(FD)) { | ||||||
17532 | QualType FT = FD->getType(); | ||||||
17533 | if (FT.isNonTrivialToPrimitiveDefaultInitialize()) { | ||||||
17534 | Record->setNonTrivialToPrimitiveDefaultInitialize(true); | ||||||
17535 | if (FT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || | ||||||
17536 | Record->isUnion()) | ||||||
17537 | Record->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(true); | ||||||
17538 | } | ||||||
17539 | QualType::PrimitiveCopyKind PCK = FT.isNonTrivialToPrimitiveCopy(); | ||||||
17540 | if (PCK != QualType::PCK_Trivial && PCK != QualType::PCK_VolatileTrivial) { | ||||||
17541 | Record->setNonTrivialToPrimitiveCopy(true); | ||||||
17542 | if (FT.hasNonTrivialToPrimitiveCopyCUnion() || Record->isUnion()) | ||||||
17543 | Record->setHasNonTrivialToPrimitiveCopyCUnion(true); | ||||||
17544 | } | ||||||
17545 | if (FT.isDestructedType()) { | ||||||
17546 | Record->setNonTrivialToPrimitiveDestroy(true); | ||||||
17547 | Record->setParamDestroyedInCallee(true); | ||||||
17548 | if (FT.hasNonTrivialToPrimitiveDestructCUnion() || Record->isUnion()) | ||||||
17549 | Record->setHasNonTrivialToPrimitiveDestructCUnion(true); | ||||||
17550 | } | ||||||
17551 | |||||||
17552 | if (const auto *RT = FT->getAs<RecordType>()) { | ||||||
17553 | if (RT->getDecl()->getArgPassingRestrictions() == | ||||||
17554 | RecordDecl::APK_CanNeverPassInRegs) | ||||||
17555 | Record->setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs); | ||||||
17556 | } else if (FT.getQualifiers().getObjCLifetime() == Qualifiers::OCL_Weak) | ||||||
17557 | Record->setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs); | ||||||
17558 | } | ||||||
17559 | |||||||
17560 | if (Record && FD->getType().isVolatileQualified()) | ||||||
17561 | Record->setHasVolatileMember(true); | ||||||
17562 | // Keep track of the number of named members. | ||||||
17563 | if (FD->getIdentifier()) | ||||||
17564 | ++NumNamedMembers; | ||||||
17565 | } | ||||||
17566 | |||||||
17567 | // Okay, we successfully defined 'Record'. | ||||||
17568 | if (Record) { | ||||||
17569 | bool Completed = false; | ||||||
17570 | if (CXXRecord) { | ||||||
17571 | if (!CXXRecord->isInvalidDecl()) { | ||||||
17572 | // Set access bits correctly on the directly-declared conversions. | ||||||
17573 | for (CXXRecordDecl::conversion_iterator | ||||||
17574 | I = CXXRecord->conversion_begin(), | ||||||
17575 | E = CXXRecord->conversion_end(); I != E; ++I) | ||||||
17576 | I.setAccess((*I)->getAccess()); | ||||||
17577 | } | ||||||
17578 | |||||||
17579 | // Add any implicitly-declared members to this class. | ||||||
17580 | AddImplicitlyDeclaredMembersToClass(CXXRecord); | ||||||
17581 | |||||||
17582 | if (!CXXRecord->isDependentType()) { | ||||||
17583 | if (!CXXRecord->isInvalidDecl()) { | ||||||
17584 | // If we have virtual base classes, we may end up finding multiple | ||||||
17585 | // final overriders for a given virtual function. Check for this | ||||||
17586 | // problem now. | ||||||
17587 | if (CXXRecord->getNumVBases()) { | ||||||
17588 | CXXFinalOverriderMap FinalOverriders; | ||||||
17589 | CXXRecord->getFinalOverriders(FinalOverriders); | ||||||
17590 | |||||||
17591 | for (CXXFinalOverriderMap::iterator M = FinalOverriders.begin(), | ||||||
17592 | MEnd = FinalOverriders.end(); | ||||||
17593 | M != MEnd; ++M) { | ||||||
17594 | for (OverridingMethods::iterator SO = M->second.begin(), | ||||||
17595 | SOEnd = M->second.end(); | ||||||
17596 | SO != SOEnd; ++SO) { | ||||||
17597 | assert(SO->second.size() > 0 &&(static_cast <bool> (SO->second.size() > 0 && "Virtual function without overriding functions?") ? void (0) : __assert_fail ("SO->second.size() > 0 && \"Virtual function without overriding functions?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17598, __extension__ __PRETTY_FUNCTION__)) | ||||||
17598 | "Virtual function without overriding functions?")(static_cast <bool> (SO->second.size() > 0 && "Virtual function without overriding functions?") ? void (0) : __assert_fail ("SO->second.size() > 0 && \"Virtual function without overriding functions?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17598, __extension__ __PRETTY_FUNCTION__)); | ||||||
17599 | if (SO->second.size() == 1) | ||||||
17600 | continue; | ||||||
17601 | |||||||
17602 | // C++ [class.virtual]p2: | ||||||
17603 | // In a derived class, if a virtual member function of a base | ||||||
17604 | // class subobject has more than one final overrider the | ||||||
17605 | // program is ill-formed. | ||||||
17606 | Diag(Record->getLocation(), diag::err_multiple_final_overriders) | ||||||
17607 | << (const NamedDecl *)M->first << Record; | ||||||
17608 | Diag(M->first->getLocation(), | ||||||
17609 | diag::note_overridden_virtual_function); | ||||||
17610 | for (OverridingMethods::overriding_iterator | ||||||
17611 | OM = SO->second.begin(), | ||||||
17612 | OMEnd = SO->second.end(); | ||||||
17613 | OM != OMEnd; ++OM) | ||||||
17614 | Diag(OM->Method->getLocation(), diag::note_final_overrider) | ||||||
17615 | << (const NamedDecl *)M->first << OM->Method->getParent(); | ||||||
17616 | |||||||
17617 | Record->setInvalidDecl(); | ||||||
17618 | } | ||||||
17619 | } | ||||||
17620 | CXXRecord->completeDefinition(&FinalOverriders); | ||||||
17621 | Completed = true; | ||||||
17622 | } | ||||||
17623 | } | ||||||
17624 | } | ||||||
17625 | } | ||||||
17626 | |||||||
17627 | if (!Completed) | ||||||
17628 | Record->completeDefinition(); | ||||||
17629 | |||||||
17630 | // Handle attributes before checking the layout. | ||||||
17631 | ProcessDeclAttributeList(S, Record, Attrs); | ||||||
17632 | |||||||
17633 | // We may have deferred checking for a deleted destructor. Check now. | ||||||
17634 | if (CXXRecord) { | ||||||
17635 | auto *Dtor = CXXRecord->getDestructor(); | ||||||
17636 | if (Dtor && Dtor->isImplicit() && | ||||||
17637 | ShouldDeleteSpecialMember(Dtor, CXXDestructor)) { | ||||||
17638 | CXXRecord->setImplicitDestructorIsDeleted(); | ||||||
17639 | SetDeclDeleted(Dtor, CXXRecord->getLocation()); | ||||||
17640 | } | ||||||
17641 | } | ||||||
17642 | |||||||
17643 | if (Record->hasAttrs()) { | ||||||
17644 | CheckAlignasUnderalignment(Record); | ||||||
17645 | |||||||
17646 | if (const MSInheritanceAttr *IA = Record->getAttr<MSInheritanceAttr>()) | ||||||
17647 | checkMSInheritanceAttrOnDefinition(cast<CXXRecordDecl>(Record), | ||||||
17648 | IA->getRange(), IA->getBestCase(), | ||||||
17649 | IA->getInheritanceModel()); | ||||||
17650 | } | ||||||
17651 | |||||||
17652 | // Check if the structure/union declaration is a type that can have zero | ||||||
17653 | // size in C. For C this is a language extension, for C++ it may cause | ||||||
17654 | // compatibility problems. | ||||||
17655 | bool CheckForZeroSize; | ||||||
17656 | if (!getLangOpts().CPlusPlus) { | ||||||
17657 | CheckForZeroSize = true; | ||||||
17658 | } else { | ||||||
17659 | // For C++ filter out types that cannot be referenced in C code. | ||||||
17660 | CXXRecordDecl *CXXRecord = cast<CXXRecordDecl>(Record); | ||||||
17661 | CheckForZeroSize = | ||||||
17662 | CXXRecord->getLexicalDeclContext()->isExternCContext() && | ||||||
17663 | !CXXRecord->isDependentType() && !inTemplateInstantiation() && | ||||||
17664 | CXXRecord->isCLike(); | ||||||
17665 | } | ||||||
17666 | if (CheckForZeroSize) { | ||||||
17667 | bool ZeroSize = true; | ||||||
17668 | bool IsEmpty = true; | ||||||
17669 | unsigned NonBitFields = 0; | ||||||
17670 | for (RecordDecl::field_iterator I = Record->field_begin(), | ||||||
17671 | E = Record->field_end(); | ||||||
17672 | (NonBitFields == 0 || ZeroSize) && I != E; ++I) { | ||||||
17673 | IsEmpty = false; | ||||||
17674 | if (I->isUnnamedBitfield()) { | ||||||
17675 | if (!I->isZeroLengthBitField(Context)) | ||||||
17676 | ZeroSize = false; | ||||||
17677 | } else { | ||||||
17678 | ++NonBitFields; | ||||||
17679 | QualType FieldType = I->getType(); | ||||||
17680 | if (FieldType->isIncompleteType() || | ||||||
17681 | !Context.getTypeSizeInChars(FieldType).isZero()) | ||||||
17682 | ZeroSize = false; | ||||||
17683 | } | ||||||
17684 | } | ||||||
17685 | |||||||
17686 | // Empty structs are an extension in C (C99 6.7.2.1p7). They are | ||||||
17687 | // allowed in C++, but warn if its declaration is inside | ||||||
17688 | // extern "C" block. | ||||||
17689 | if (ZeroSize) { | ||||||
17690 | Diag(RecLoc, getLangOpts().CPlusPlus ? | ||||||
17691 | diag::warn_zero_size_struct_union_in_extern_c : | ||||||
17692 | diag::warn_zero_size_struct_union_compat) | ||||||
17693 | << IsEmpty << Record->isUnion() << (NonBitFields > 1); | ||||||
17694 | } | ||||||
17695 | |||||||
17696 | // Structs without named members are extension in C (C99 6.7.2.1p7), | ||||||
17697 | // but are accepted by GCC. | ||||||
17698 | if (NonBitFields == 0 && !getLangOpts().CPlusPlus) { | ||||||
17699 | Diag(RecLoc, IsEmpty ? diag::ext_empty_struct_union : | ||||||
17700 | diag::ext_no_named_members_in_struct_union) | ||||||
17701 | << Record->isUnion(); | ||||||
17702 | } | ||||||
17703 | } | ||||||
17704 | } else { | ||||||
17705 | ObjCIvarDecl **ClsFields = | ||||||
17706 | reinterpret_cast<ObjCIvarDecl**>(RecFields.data()); | ||||||
17707 | if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl)) { | ||||||
17708 | ID->setEndOfDefinitionLoc(RBrac); | ||||||
17709 | // Add ivar's to class's DeclContext. | ||||||
17710 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { | ||||||
17711 | ClsFields[i]->setLexicalDeclContext(ID); | ||||||
17712 | ID->addDecl(ClsFields[i]); | ||||||
17713 | } | ||||||
17714 | // Must enforce the rule that ivars in the base classes may not be | ||||||
17715 | // duplicates. | ||||||
17716 | if (ID->getSuperClass()) | ||||||
17717 | DiagnoseDuplicateIvars(ID, ID->getSuperClass()); | ||||||
17718 | } else if (ObjCImplementationDecl *IMPDecl = | ||||||
17719 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { | ||||||
17720 | assert(IMPDecl && "ActOnFields - missing ObjCImplementationDecl")(static_cast <bool> (IMPDecl && "ActOnFields - missing ObjCImplementationDecl" ) ? void (0) : __assert_fail ("IMPDecl && \"ActOnFields - missing ObjCImplementationDecl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17720, __extension__ __PRETTY_FUNCTION__)); | ||||||
17721 | for (unsigned I = 0, N = RecFields.size(); I != N; ++I) | ||||||
17722 | // Ivar declared in @implementation never belongs to the implementation. | ||||||
17723 | // Only it is in implementation's lexical context. | ||||||
17724 | ClsFields[I]->setLexicalDeclContext(IMPDecl); | ||||||
17725 | CheckImplementationIvars(IMPDecl, ClsFields, RecFields.size(), RBrac); | ||||||
17726 | IMPDecl->setIvarLBraceLoc(LBrac); | ||||||
17727 | IMPDecl->setIvarRBraceLoc(RBrac); | ||||||
17728 | } else if (ObjCCategoryDecl *CDecl = | ||||||
17729 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { | ||||||
17730 | // case of ivars in class extension; all other cases have been | ||||||
17731 | // reported as errors elsewhere. | ||||||
17732 | // FIXME. Class extension does not have a LocEnd field. | ||||||
17733 | // CDecl->setLocEnd(RBrac); | ||||||
17734 | // Add ivar's to class extension's DeclContext. | ||||||
17735 | // Diagnose redeclaration of private ivars. | ||||||
17736 | ObjCInterfaceDecl *IDecl = CDecl->getClassInterface(); | ||||||
17737 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { | ||||||
17738 | if (IDecl) { | ||||||
17739 | if (const ObjCIvarDecl *ClsIvar = | ||||||
17740 | IDecl->getIvarDecl(ClsFields[i]->getIdentifier())) { | ||||||
17741 | Diag(ClsFields[i]->getLocation(), | ||||||
17742 | diag::err_duplicate_ivar_declaration); | ||||||
17743 | Diag(ClsIvar->getLocation(), diag::note_previous_definition); | ||||||
17744 | continue; | ||||||
17745 | } | ||||||
17746 | for (const auto *Ext : IDecl->known_extensions()) { | ||||||
17747 | if (const ObjCIvarDecl *ClsExtIvar | ||||||
17748 | = Ext->getIvarDecl(ClsFields[i]->getIdentifier())) { | ||||||
17749 | Diag(ClsFields[i]->getLocation(), | ||||||
17750 | diag::err_duplicate_ivar_declaration); | ||||||
17751 | Diag(ClsExtIvar->getLocation(), diag::note_previous_definition); | ||||||
17752 | continue; | ||||||
17753 | } | ||||||
17754 | } | ||||||
17755 | } | ||||||
17756 | ClsFields[i]->setLexicalDeclContext(CDecl); | ||||||
17757 | CDecl->addDecl(ClsFields[i]); | ||||||
17758 | } | ||||||
17759 | CDecl->setIvarLBraceLoc(LBrac); | ||||||
17760 | CDecl->setIvarRBraceLoc(RBrac); | ||||||
17761 | } | ||||||
17762 | } | ||||||
17763 | } | ||||||
17764 | |||||||
17765 | /// Determine whether the given integral value is representable within | ||||||
17766 | /// the given type T. | ||||||
17767 | static bool isRepresentableIntegerValue(ASTContext &Context, | ||||||
17768 | llvm::APSInt &Value, | ||||||
17769 | QualType T) { | ||||||
17770 | assert((T->isIntegralType(Context) || T->isEnumeralType()) &&(static_cast <bool> ((T->isIntegralType(Context) || T ->isEnumeralType()) && "Integral type required!") ? void (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17771, __extension__ __PRETTY_FUNCTION__)) | ||||||
17771 | "Integral type required!")(static_cast <bool> ((T->isIntegralType(Context) || T ->isEnumeralType()) && "Integral type required!") ? void (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17771, __extension__ __PRETTY_FUNCTION__)); | ||||||
17772 | unsigned BitWidth = Context.getIntWidth(T); | ||||||
17773 | |||||||
17774 | if (Value.isUnsigned() || Value.isNonNegative()) { | ||||||
17775 | if (T->isSignedIntegerOrEnumerationType()) | ||||||
17776 | --BitWidth; | ||||||
17777 | return Value.getActiveBits() <= BitWidth; | ||||||
17778 | } | ||||||
17779 | return Value.getMinSignedBits() <= BitWidth; | ||||||
17780 | } | ||||||
17781 | |||||||
17782 | // Given an integral type, return the next larger integral type | ||||||
17783 | // (or a NULL type of no such type exists). | ||||||
17784 | static QualType getNextLargerIntegralType(ASTContext &Context, QualType T) { | ||||||
17785 | // FIXME: Int128/UInt128 support, which also needs to be introduced into | ||||||
17786 | // enum checking below. | ||||||
17787 | assert((T->isIntegralType(Context) ||(static_cast <bool> ((T->isIntegralType(Context) || T ->isEnumeralType()) && "Integral type required!") ? void (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17788, __extension__ __PRETTY_FUNCTION__)) | ||||||
17788 | T->isEnumeralType()) && "Integral type required!")(static_cast <bool> ((T->isIntegralType(Context) || T ->isEnumeralType()) && "Integral type required!") ? void (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 17788, __extension__ __PRETTY_FUNCTION__)); | ||||||
17789 | const unsigned NumTypes = 4; | ||||||
17790 | QualType SignedIntegralTypes[NumTypes] = { | ||||||
17791 | Context.ShortTy, Context.IntTy, Context.LongTy, Context.LongLongTy | ||||||
17792 | }; | ||||||
17793 | QualType UnsignedIntegralTypes[NumTypes] = { | ||||||
17794 | Context.UnsignedShortTy, Context.UnsignedIntTy, Context.UnsignedLongTy, | ||||||
17795 | Context.UnsignedLongLongTy | ||||||
17796 | }; | ||||||
17797 | |||||||
17798 | unsigned BitWidth = Context.getTypeSize(T); | ||||||
17799 | QualType *Types = T->isSignedIntegerOrEnumerationType()? SignedIntegralTypes | ||||||
17800 | : UnsignedIntegralTypes; | ||||||
17801 | for (unsigned I = 0; I != NumTypes; ++I) | ||||||
17802 | if (Context.getTypeSize(Types[I]) > BitWidth) | ||||||
17803 | return Types[I]; | ||||||
17804 | |||||||
17805 | return QualType(); | ||||||
17806 | } | ||||||
17807 | |||||||
17808 | EnumConstantDecl *Sema::CheckEnumConstant(EnumDecl *Enum, | ||||||
17809 | EnumConstantDecl *LastEnumConst, | ||||||
17810 | SourceLocation IdLoc, | ||||||
17811 | IdentifierInfo *Id, | ||||||
17812 | Expr *Val) { | ||||||
17813 | unsigned IntWidth = Context.getTargetInfo().getIntWidth(); | ||||||
17814 | llvm::APSInt EnumVal(IntWidth); | ||||||
17815 | QualType EltTy; | ||||||
17816 | |||||||
17817 | if (Val && DiagnoseUnexpandedParameterPack(Val, UPPC_EnumeratorValue)) | ||||||
17818 | Val = nullptr; | ||||||
17819 | |||||||
17820 | if (Val) | ||||||
17821 | Val = DefaultLvalueConversion(Val).get(); | ||||||
17822 | |||||||
17823 | if (Val) { | ||||||
17824 | if (Enum->isDependentType() || Val->isTypeDependent() || | ||||||
17825 | Val->containsErrors()) | ||||||
17826 | EltTy = Context.DependentTy; | ||||||
17827 | else { | ||||||
17828 | // FIXME: We don't allow folding in C++11 mode for an enum with a fixed | ||||||
17829 | // underlying type, but do allow it in all other contexts. | ||||||
17830 | if (getLangOpts().CPlusPlus11 && Enum->isFixed()) { | ||||||
17831 | // C++11 [dcl.enum]p5: If the underlying type is fixed, [...] the | ||||||
17832 | // constant-expression in the enumerator-definition shall be a converted | ||||||
17833 | // constant expression of the underlying type. | ||||||
17834 | EltTy = Enum->getIntegerType(); | ||||||
17835 | ExprResult Converted = | ||||||
17836 | CheckConvertedConstantExpression(Val, EltTy, EnumVal, | ||||||
17837 | CCEK_Enumerator); | ||||||
17838 | if (Converted.isInvalid()) | ||||||
17839 | Val = nullptr; | ||||||
17840 | else | ||||||
17841 | Val = Converted.get(); | ||||||
17842 | } else if (!Val->isValueDependent() && | ||||||
17843 | !(Val = | ||||||
17844 | VerifyIntegerConstantExpression(Val, &EnumVal, AllowFold) | ||||||
17845 | .get())) { | ||||||
17846 | // C99 6.7.2.2p2: Make sure we have an integer constant expression. | ||||||
17847 | } else { | ||||||
17848 | if (Enum->isComplete()) { | ||||||
17849 | EltTy = Enum->getIntegerType(); | ||||||
17850 | |||||||
17851 | // In Obj-C and Microsoft mode, require the enumeration value to be | ||||||
17852 | // representable in the underlying type of the enumeration. In C++11, | ||||||
17853 | // we perform a non-narrowing conversion as part of converted constant | ||||||
17854 | // expression checking. | ||||||
17855 | if (!isRepresentableIntegerValue(Context, EnumVal, EltTy)) { | ||||||
17856 | if (Context.getTargetInfo() | ||||||
17857 | .getTriple() | ||||||
17858 | .isWindowsMSVCEnvironment()) { | ||||||
17859 | Diag(IdLoc, diag::ext_enumerator_too_large) << EltTy; | ||||||
17860 | } else { | ||||||
17861 | Diag(IdLoc, diag::err_enumerator_too_large) << EltTy; | ||||||
17862 | } | ||||||
17863 | } | ||||||
17864 | |||||||
17865 | // Cast to the underlying type. | ||||||
17866 | Val = ImpCastExprToType(Val, EltTy, | ||||||
17867 | EltTy->isBooleanType() ? CK_IntegralToBoolean | ||||||
17868 | : CK_IntegralCast) | ||||||
17869 | .get(); | ||||||
17870 | } else if (getLangOpts().CPlusPlus) { | ||||||
17871 | // C++11 [dcl.enum]p5: | ||||||
17872 | // If the underlying type is not fixed, the type of each enumerator | ||||||
17873 | // is the type of its initializing value: | ||||||
17874 | // - If an initializer is specified for an enumerator, the | ||||||
17875 | // initializing value has the same type as the expression. | ||||||
17876 | EltTy = Val->getType(); | ||||||
17877 | } else { | ||||||
17878 | // C99 6.7.2.2p2: | ||||||
17879 | // The expression that defines the value of an enumeration constant | ||||||
17880 | // shall be an integer constant expression that has a value | ||||||
17881 | // representable as an int. | ||||||
17882 | |||||||
17883 | // Complain if the value is not representable in an int. | ||||||
17884 | if (!isRepresentableIntegerValue(Context, EnumVal, Context.IntTy)) | ||||||
17885 | Diag(IdLoc, diag::ext_enum_value_not_int) | ||||||
17886 | << toString(EnumVal, 10) << Val->getSourceRange() | ||||||
17887 | << (EnumVal.isUnsigned() || EnumVal.isNonNegative()); | ||||||
17888 | else if (!Context.hasSameType(Val->getType(), Context.IntTy)) { | ||||||
17889 | // Force the type of the expression to 'int'. | ||||||
17890 | Val = ImpCastExprToType(Val, Context.IntTy, CK_IntegralCast).get(); | ||||||
17891 | } | ||||||
17892 | EltTy = Val->getType(); | ||||||
17893 | } | ||||||
17894 | } | ||||||
17895 | } | ||||||
17896 | } | ||||||
17897 | |||||||
17898 | if (!Val) { | ||||||
17899 | if (Enum->isDependentType()) | ||||||
17900 | EltTy = Context.DependentTy; | ||||||
17901 | else if (!LastEnumConst) { | ||||||
17902 | // C++0x [dcl.enum]p5: | ||||||
17903 | // If the underlying type is not fixed, the type of each enumerator | ||||||
17904 | // is the type of its initializing value: | ||||||
17905 | // - If no initializer is specified for the first enumerator, the | ||||||
17906 | // initializing value has an unspecified integral type. | ||||||
17907 | // | ||||||
17908 | // GCC uses 'int' for its unspecified integral type, as does | ||||||
17909 | // C99 6.7.2.2p3. | ||||||
17910 | if (Enum->isFixed()) { | ||||||
17911 | EltTy = Enum->getIntegerType(); | ||||||
17912 | } | ||||||
17913 | else { | ||||||
17914 | EltTy = Context.IntTy; | ||||||
17915 | } | ||||||
17916 | } else { | ||||||
17917 | // Assign the last value + 1. | ||||||
17918 | EnumVal = LastEnumConst->getInitVal(); | ||||||
17919 | ++EnumVal; | ||||||
17920 | EltTy = LastEnumConst->getType(); | ||||||
17921 | |||||||
17922 | // Check for overflow on increment. | ||||||
17923 | if (EnumVal < LastEnumConst->getInitVal()) { | ||||||
17924 | // C++0x [dcl.enum]p5: | ||||||
17925 | // If the underlying type is not fixed, the type of each enumerator | ||||||
17926 | // is the type of its initializing value: | ||||||
17927 | // | ||||||
17928 | // - Otherwise the type of the initializing value is the same as | ||||||
17929 | // the type of the initializing value of the preceding enumerator | ||||||
17930 | // unless the incremented value is not representable in that type, | ||||||
17931 | // in which case the type is an unspecified integral type | ||||||
17932 | // sufficient to contain the incremented value. If no such type | ||||||
17933 | // exists, the program is ill-formed. | ||||||
17934 | QualType T = getNextLargerIntegralType(Context, EltTy); | ||||||
17935 | if (T.isNull() || Enum->isFixed()) { | ||||||
17936 | // There is no integral type larger enough to represent this | ||||||
17937 | // value. Complain, then allow the value to wrap around. | ||||||
17938 | EnumVal = LastEnumConst->getInitVal(); | ||||||
17939 | EnumVal = EnumVal.zext(EnumVal.getBitWidth() * 2); | ||||||
17940 | ++EnumVal; | ||||||
17941 | if (Enum->isFixed()) | ||||||
17942 | // When the underlying type is fixed, this is ill-formed. | ||||||
17943 | Diag(IdLoc, diag::err_enumerator_wrapped) | ||||||
17944 | << toString(EnumVal, 10) | ||||||
17945 | << EltTy; | ||||||
17946 | else | ||||||
17947 | Diag(IdLoc, diag::ext_enumerator_increment_too_large) | ||||||
17948 | << toString(EnumVal, 10); | ||||||
17949 | } else { | ||||||
17950 | EltTy = T; | ||||||
17951 | } | ||||||
17952 | |||||||
17953 | // Retrieve the last enumerator's value, extent that type to the | ||||||
17954 | // type that is supposed to be large enough to represent the incremented | ||||||
17955 | // value, then increment. | ||||||
17956 | EnumVal = LastEnumConst->getInitVal(); | ||||||
17957 | EnumVal.setIsSigned(EltTy->isSignedIntegerOrEnumerationType()); | ||||||
17958 | EnumVal = EnumVal.zextOrTrunc(Context.getIntWidth(EltTy)); | ||||||
17959 | ++EnumVal; | ||||||
17960 | |||||||
17961 | // If we're not in C++, diagnose the overflow of enumerator values, | ||||||
17962 | // which in C99 means that the enumerator value is not representable in | ||||||
17963 | // an int (C99 6.7.2.2p2). However, we support GCC's extension that | ||||||
17964 | // permits enumerator values that are representable in some larger | ||||||
17965 | // integral type. | ||||||
17966 | if (!getLangOpts().CPlusPlus && !T.isNull()) | ||||||
17967 | Diag(IdLoc, diag::warn_enum_value_overflow); | ||||||
17968 | } else if (!getLangOpts().CPlusPlus && | ||||||
17969 | !isRepresentableIntegerValue(Context, EnumVal, EltTy)) { | ||||||
17970 | // Enforce C99 6.7.2.2p2 even when we compute the next value. | ||||||
17971 | Diag(IdLoc, diag::ext_enum_value_not_int) | ||||||
17972 | << toString(EnumVal, 10) << 1; | ||||||
17973 | } | ||||||
17974 | } | ||||||
17975 | } | ||||||
17976 | |||||||
17977 | if (!EltTy->isDependentType()) { | ||||||
17978 | // Make the enumerator value match the signedness and size of the | ||||||
17979 | // enumerator's type. | ||||||
17980 | EnumVal = EnumVal.extOrTrunc(Context.getIntWidth(EltTy)); | ||||||
17981 | EnumVal.setIsSigned(EltTy->isSignedIntegerOrEnumerationType()); | ||||||
17982 | } | ||||||
17983 | |||||||
17984 | return EnumConstantDecl::Create(Context, Enum, IdLoc, Id, EltTy, | ||||||
17985 | Val, EnumVal); | ||||||
17986 | } | ||||||
17987 | |||||||
17988 | Sema::SkipBodyInfo Sema::shouldSkipAnonEnumBody(Scope *S, IdentifierInfo *II, | ||||||
17989 | SourceLocation IILoc) { | ||||||
17990 | if (!(getLangOpts().Modules || getLangOpts().ModulesLocalVisibility) || | ||||||
17991 | !getLangOpts().CPlusPlus) | ||||||
17992 | return SkipBodyInfo(); | ||||||
17993 | |||||||
17994 | // We have an anonymous enum definition. Look up the first enumerator to | ||||||
17995 | // determine if we should merge the definition with an existing one and | ||||||
17996 | // skip the body. | ||||||
17997 | NamedDecl *PrevDecl = LookupSingleName(S, II, IILoc, LookupOrdinaryName, | ||||||
17998 | forRedeclarationInCurContext()); | ||||||
17999 | auto *PrevECD = dyn_cast_or_null<EnumConstantDecl>(PrevDecl); | ||||||
18000 | if (!PrevECD) | ||||||
18001 | return SkipBodyInfo(); | ||||||
18002 | |||||||
18003 | EnumDecl *PrevED = cast<EnumDecl>(PrevECD->getDeclContext()); | ||||||
18004 | NamedDecl *Hidden; | ||||||
18005 | if (!PrevED->getDeclName() && !hasVisibleDefinition(PrevED, &Hidden)) { | ||||||
18006 | SkipBodyInfo Skip; | ||||||
18007 | Skip.Previous = Hidden; | ||||||
18008 | return Skip; | ||||||
18009 | } | ||||||
18010 | |||||||
18011 | return SkipBodyInfo(); | ||||||
18012 | } | ||||||
18013 | |||||||
18014 | Decl *Sema::ActOnEnumConstant(Scope *S, Decl *theEnumDecl, Decl *lastEnumConst, | ||||||
18015 | SourceLocation IdLoc, IdentifierInfo *Id, | ||||||
18016 | const ParsedAttributesView &Attrs, | ||||||
18017 | SourceLocation EqualLoc, Expr *Val) { | ||||||
18018 | EnumDecl *TheEnumDecl = cast<EnumDecl>(theEnumDecl); | ||||||
18019 | EnumConstantDecl *LastEnumConst = | ||||||
18020 | cast_or_null<EnumConstantDecl>(lastEnumConst); | ||||||
18021 | |||||||
18022 | // The scope passed in may not be a decl scope. Zip up the scope tree until | ||||||
18023 | // we find one that is. | ||||||
18024 | S = getNonFieldDeclScope(S); | ||||||
18025 | |||||||
18026 | // Verify that there isn't already something declared with this name in this | ||||||
18027 | // scope. | ||||||
18028 | LookupResult R(*this, Id, IdLoc, LookupOrdinaryName, ForVisibleRedeclaration); | ||||||
18029 | LookupName(R, S); | ||||||
18030 | NamedDecl *PrevDecl = R.getAsSingle<NamedDecl>(); | ||||||
18031 | |||||||
18032 | if (PrevDecl && PrevDecl->isTemplateParameter()) { | ||||||
18033 | // Maybe we will complain about the shadowed template parameter. | ||||||
18034 | DiagnoseTemplateParameterShadow(IdLoc, PrevDecl); | ||||||
18035 | // Just pretend that we didn't see the previous declaration. | ||||||
18036 | PrevDecl = nullptr; | ||||||
18037 | } | ||||||
18038 | |||||||
18039 | // C++ [class.mem]p15: | ||||||
18040 | // If T is the name of a class, then each of the following shall have a name | ||||||
18041 | // different from T: | ||||||
18042 | // - every enumerator of every member of class T that is an unscoped | ||||||
18043 | // enumerated type | ||||||
18044 | if (getLangOpts().CPlusPlus && !TheEnumDecl->isScoped()) | ||||||
18045 | DiagnoseClassNameShadow(TheEnumDecl->getDeclContext(), | ||||||
18046 | DeclarationNameInfo(Id, IdLoc)); | ||||||
18047 | |||||||
18048 | EnumConstantDecl *New = | ||||||
18049 | CheckEnumConstant(TheEnumDecl, LastEnumConst, IdLoc, Id, Val); | ||||||
18050 | if (!New) | ||||||
18051 | return nullptr; | ||||||
18052 | |||||||
18053 | if (PrevDecl) { | ||||||
18054 | if (!TheEnumDecl->isScoped() && isa<ValueDecl>(PrevDecl)) { | ||||||
18055 | // Check for other kinds of shadowing not already handled. | ||||||
18056 | CheckShadow(New, PrevDecl, R); | ||||||
18057 | } | ||||||
18058 | |||||||
18059 | // When in C++, we may get a TagDecl with the same name; in this case the | ||||||
18060 | // enum constant will 'hide' the tag. | ||||||
18061 | assert((getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) &&(static_cast <bool> ((getLangOpts().CPlusPlus || !isa< TagDecl>(PrevDecl)) && "Received TagDecl when not in C++!" ) ? void (0) : __assert_fail ("(getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) && \"Received TagDecl when not in C++!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 18062, __extension__ __PRETTY_FUNCTION__)) | ||||||
18062 | "Received TagDecl when not in C++!")(static_cast <bool> ((getLangOpts().CPlusPlus || !isa< TagDecl>(PrevDecl)) && "Received TagDecl when not in C++!" ) ? void (0) : __assert_fail ("(getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) && \"Received TagDecl when not in C++!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 18062, __extension__ __PRETTY_FUNCTION__)); | ||||||
18063 | if (!isa<TagDecl>(PrevDecl) && isDeclInScope(PrevDecl, CurContext, S)) { | ||||||
18064 | if (isa<EnumConstantDecl>(PrevDecl)) | ||||||
18065 | Diag(IdLoc, diag::err_redefinition_of_enumerator) << Id; | ||||||
18066 | else | ||||||
18067 | Diag(IdLoc, diag::err_redefinition) << Id; | ||||||
18068 | notePreviousDefinition(PrevDecl, IdLoc); | ||||||
18069 | return nullptr; | ||||||
18070 | } | ||||||
18071 | } | ||||||
18072 | |||||||
18073 | // Process attributes. | ||||||
18074 | ProcessDeclAttributeList(S, New, Attrs); | ||||||
18075 | AddPragmaAttributes(S, New); | ||||||
18076 | |||||||
18077 | // Register this decl in the current scope stack. | ||||||
18078 | New->setAccess(TheEnumDecl->getAccess()); | ||||||
18079 | PushOnScopeChains(New, S); | ||||||
18080 | |||||||
18081 | ActOnDocumentableDecl(New); | ||||||
18082 | |||||||
18083 | return New; | ||||||
18084 | } | ||||||
18085 | |||||||
18086 | // Returns true when the enum initial expression does not trigger the | ||||||
18087 | // duplicate enum warning. A few common cases are exempted as follows: | ||||||
18088 | // Element2 = Element1 | ||||||
18089 | // Element2 = Element1 + 1 | ||||||
18090 | // Element2 = Element1 - 1 | ||||||
18091 | // Where Element2 and Element1 are from the same enum. | ||||||
18092 | static bool ValidDuplicateEnum(EnumConstantDecl *ECD, EnumDecl *Enum) { | ||||||
18093 | Expr *InitExpr = ECD->getInitExpr(); | ||||||
18094 | if (!InitExpr) | ||||||
18095 | return true; | ||||||
18096 | InitExpr = InitExpr->IgnoreImpCasts(); | ||||||
18097 | |||||||
18098 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(InitExpr)) { | ||||||
18099 | if (!BO->isAdditiveOp()) | ||||||
18100 | return true; | ||||||
18101 | IntegerLiteral *IL = dyn_cast<IntegerLiteral>(BO->getRHS()); | ||||||
18102 | if (!IL) | ||||||
18103 | return true; | ||||||
18104 | if (IL->getValue() != 1) | ||||||
18105 | return true; | ||||||
18106 | |||||||
18107 | InitExpr = BO->getLHS(); | ||||||
18108 | } | ||||||
18109 | |||||||
18110 | // This checks if the elements are from the same enum. | ||||||
18111 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(InitExpr); | ||||||
18112 | if (!DRE) | ||||||
18113 | return true; | ||||||
18114 | |||||||
18115 | EnumConstantDecl *EnumConstant = dyn_cast<EnumConstantDecl>(DRE->getDecl()); | ||||||
18116 | if (!EnumConstant) | ||||||
18117 | return true; | ||||||
18118 | |||||||
18119 | if (cast<EnumDecl>(TagDecl::castFromDeclContext(ECD->getDeclContext())) != | ||||||
18120 | Enum) | ||||||
18121 | return true; | ||||||
18122 | |||||||
18123 | return false; | ||||||
18124 | } | ||||||
18125 | |||||||
18126 | // Emits a warning when an element is implicitly set a value that | ||||||
18127 | // a previous element has already been set to. | ||||||
18128 | static void CheckForDuplicateEnumValues(Sema &S, ArrayRef<Decl *> Elements, | ||||||
18129 | EnumDecl *Enum, QualType EnumType) { | ||||||
18130 | // Avoid anonymous enums | ||||||
18131 | if (!Enum->getIdentifier()) | ||||||
18132 | return; | ||||||
18133 | |||||||
18134 | // Only check for small enums. | ||||||
18135 | if (Enum->getNumPositiveBits() > 63 || Enum->getNumNegativeBits() > 64) | ||||||
18136 | return; | ||||||
18137 | |||||||
18138 | if (S.Diags.isIgnored(diag::warn_duplicate_enum_values, Enum->getLocation())) | ||||||
18139 | return; | ||||||
18140 | |||||||
18141 | typedef SmallVector<EnumConstantDecl *, 3> ECDVector; | ||||||
18142 | typedef SmallVector<std::unique_ptr<ECDVector>, 3> DuplicatesVector; | ||||||
18143 | |||||||
18144 | typedef llvm::PointerUnion<EnumConstantDecl*, ECDVector*> DeclOrVector; | ||||||
18145 | |||||||
18146 | // DenseMaps cannot contain the all ones int64_t value, so use unordered_map. | ||||||
18147 | typedef std::unordered_map<int64_t, DeclOrVector> ValueToVectorMap; | ||||||
18148 | |||||||
18149 | // Use int64_t as a key to avoid needing special handling for map keys. | ||||||
18150 | auto EnumConstantToKey = [](const EnumConstantDecl *D) { | ||||||
18151 | llvm::APSInt Val = D->getInitVal(); | ||||||
18152 | return Val.isSigned() ? Val.getSExtValue() : Val.getZExtValue(); | ||||||
18153 | }; | ||||||
18154 | |||||||
18155 | DuplicatesVector DupVector; | ||||||
18156 | ValueToVectorMap EnumMap; | ||||||
18157 | |||||||
18158 | // Populate the EnumMap with all values represented by enum constants without | ||||||
18159 | // an initializer. | ||||||
18160 | for (auto *Element : Elements) { | ||||||
18161 | EnumConstantDecl *ECD = cast_or_null<EnumConstantDecl>(Element); | ||||||
18162 | |||||||
18163 | // Null EnumConstantDecl means a previous diagnostic has been emitted for | ||||||
18164 | // this constant. Skip this enum since it may be ill-formed. | ||||||
18165 | if (!ECD) { | ||||||
18166 | return; | ||||||
18167 | } | ||||||
18168 | |||||||
18169 | // Constants with initalizers are handled in the next loop. | ||||||
18170 | if (ECD->getInitExpr()) | ||||||
18171 | continue; | ||||||
18172 | |||||||
18173 | // Duplicate values are handled in the next loop. | ||||||
18174 | EnumMap.insert({EnumConstantToKey(ECD), ECD}); | ||||||
18175 | } | ||||||
18176 | |||||||
18177 | if (EnumMap.size() == 0) | ||||||
18178 | return; | ||||||
18179 | |||||||
18180 | // Create vectors for any values that has duplicates. | ||||||
18181 | for (auto *Element : Elements) { | ||||||
18182 | // The last loop returned if any constant was null. | ||||||
18183 | EnumConstantDecl *ECD = cast<EnumConstantDecl>(Element); | ||||||
18184 | if (!ValidDuplicateEnum(ECD, Enum)) | ||||||
18185 | continue; | ||||||
18186 | |||||||
18187 | auto Iter = EnumMap.find(EnumConstantToKey(ECD)); | ||||||
18188 | if (Iter == EnumMap.end()) | ||||||
18189 | continue; | ||||||
18190 | |||||||
18191 | DeclOrVector& Entry = Iter->second; | ||||||
18192 | if (EnumConstantDecl *D = Entry.dyn_cast<EnumConstantDecl*>()) { | ||||||
18193 | // Ensure constants are different. | ||||||
18194 | if (D == ECD) | ||||||
18195 | continue; | ||||||
18196 | |||||||
18197 | // Create new vector and push values onto it. | ||||||
18198 | auto Vec = std::make_unique<ECDVector>(); | ||||||
18199 | Vec->push_back(D); | ||||||
18200 | Vec->push_back(ECD); | ||||||
18201 | |||||||
18202 | // Update entry to point to the duplicates vector. | ||||||
18203 | Entry = Vec.get(); | ||||||
18204 | |||||||
18205 | // Store the vector somewhere we can consult later for quick emission of | ||||||
18206 | // diagnostics. | ||||||
18207 | DupVector.emplace_back(std::move(Vec)); | ||||||
18208 | continue; | ||||||
18209 | } | ||||||
18210 | |||||||
18211 | ECDVector *Vec = Entry.get<ECDVector*>(); | ||||||
18212 | // Make sure constants are not added more than once. | ||||||
18213 | if (*Vec->begin() == ECD) | ||||||
18214 | continue; | ||||||
18215 | |||||||
18216 | Vec->push_back(ECD); | ||||||
18217 | } | ||||||
18218 | |||||||
18219 | // Emit diagnostics. | ||||||
18220 | for (const auto &Vec : DupVector) { | ||||||
18221 | assert(Vec->size() > 1 && "ECDVector should have at least 2 elements.")(static_cast <bool> (Vec->size() > 1 && "ECDVector should have at least 2 elements." ) ? void (0) : __assert_fail ("Vec->size() > 1 && \"ECDVector should have at least 2 elements.\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 18221, __extension__ __PRETTY_FUNCTION__)); | ||||||
18222 | |||||||
18223 | // Emit warning for one enum constant. | ||||||
18224 | auto *FirstECD = Vec->front(); | ||||||
18225 | S.Diag(FirstECD->getLocation(), diag::warn_duplicate_enum_values) | ||||||
18226 | << FirstECD << toString(FirstECD->getInitVal(), 10) | ||||||
18227 | << FirstECD->getSourceRange(); | ||||||
18228 | |||||||
18229 | // Emit one note for each of the remaining enum constants with | ||||||
18230 | // the same value. | ||||||
18231 | for (auto *ECD : llvm::make_range(Vec->begin() + 1, Vec->end())) | ||||||
18232 | S.Diag(ECD->getLocation(), diag::note_duplicate_element) | ||||||
18233 | << ECD << toString(ECD->getInitVal(), 10) | ||||||
18234 | << ECD->getSourceRange(); | ||||||
18235 | } | ||||||
18236 | } | ||||||
18237 | |||||||
18238 | bool Sema::IsValueInFlagEnum(const EnumDecl *ED, const llvm::APInt &Val, | ||||||
18239 | bool AllowMask) const { | ||||||
18240 | assert(ED->isClosedFlag() && "looking for value in non-flag or open enum")(static_cast <bool> (ED->isClosedFlag() && "looking for value in non-flag or open enum" ) ? void (0) : __assert_fail ("ED->isClosedFlag() && \"looking for value in non-flag or open enum\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 18240, __extension__ __PRETTY_FUNCTION__)); | ||||||
18241 | assert(ED->isCompleteDefinition() && "expected enum definition")(static_cast <bool> (ED->isCompleteDefinition() && "expected enum definition") ? void (0) : __assert_fail ("ED->isCompleteDefinition() && \"expected enum definition\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 18241, __extension__ __PRETTY_FUNCTION__)); | ||||||
18242 | |||||||
18243 | auto R = FlagBitsCache.insert(std::make_pair(ED, llvm::APInt())); | ||||||
18244 | llvm::APInt &FlagBits = R.first->second; | ||||||
18245 | |||||||
18246 | if (R.second) { | ||||||
18247 | for (auto *E : ED->enumerators()) { | ||||||
18248 | const auto &EVal = E->getInitVal(); | ||||||
18249 | // Only single-bit enumerators introduce new flag values. | ||||||
18250 | if (EVal.isPowerOf2()) | ||||||
18251 | FlagBits = FlagBits.zextOrSelf(EVal.getBitWidth()) | EVal; | ||||||
18252 | } | ||||||
18253 | } | ||||||
18254 | |||||||
18255 | // A value is in a flag enum if either its bits are a subset of the enum's | ||||||
18256 | // flag bits (the first condition) or we are allowing masks and the same is | ||||||
18257 | // true of its complement (the second condition). When masks are allowed, we | ||||||
18258 | // allow the common idiom of ~(enum1 | enum2) to be a valid enum value. | ||||||
18259 | // | ||||||
18260 | // While it's true that any value could be used as a mask, the assumption is | ||||||
18261 | // that a mask will have all of the insignificant bits set. Anything else is | ||||||
18262 | // likely a logic error. | ||||||
18263 | llvm::APInt FlagMask = ~FlagBits.zextOrTrunc(Val.getBitWidth()); | ||||||
18264 | return !(FlagMask & Val) || (AllowMask && !(FlagMask & ~Val)); | ||||||
18265 | } | ||||||
18266 | |||||||
18267 | void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange, | ||||||
18268 | Decl *EnumDeclX, ArrayRef<Decl *> Elements, Scope *S, | ||||||
18269 | const ParsedAttributesView &Attrs) { | ||||||
18270 | EnumDecl *Enum = cast<EnumDecl>(EnumDeclX); | ||||||
18271 | QualType EnumType = Context.getTypeDeclType(Enum); | ||||||
18272 | |||||||
18273 | ProcessDeclAttributeList(S, Enum, Attrs); | ||||||
18274 | |||||||
18275 | if (Enum->isDependentType()) { | ||||||
18276 | for (unsigned i = 0, e = Elements.size(); i != e; ++i) { | ||||||
18277 | EnumConstantDecl *ECD = | ||||||
18278 | cast_or_null<EnumConstantDecl>(Elements[i]); | ||||||
18279 | if (!ECD) continue; | ||||||
18280 | |||||||
18281 | ECD->setType(EnumType); | ||||||
18282 | } | ||||||
18283 | |||||||
18284 | Enum->completeDefinition(Context.DependentTy, Context.DependentTy, 0, 0); | ||||||
18285 | return; | ||||||
18286 | } | ||||||
18287 | |||||||
18288 | // TODO: If the result value doesn't fit in an int, it must be a long or long | ||||||
18289 | // long value. ISO C does not support this, but GCC does as an extension, | ||||||
18290 | // emit a warning. | ||||||
18291 | unsigned IntWidth = Context.getTargetInfo().getIntWidth(); | ||||||
18292 | unsigned CharWidth = Context.getTargetInfo().getCharWidth(); | ||||||
18293 | unsigned ShortWidth = Context.getTargetInfo().getShortWidth(); | ||||||
18294 | |||||||
18295 | // Verify that all the values are okay, compute the size of the values, and | ||||||
18296 | // reverse the list. | ||||||
18297 | unsigned NumNegativeBits = 0; | ||||||
18298 | unsigned NumPositiveBits = 0; | ||||||
18299 | |||||||
18300 | // Keep track of whether all elements have type int. | ||||||
18301 | bool AllElementsInt = true; | ||||||
18302 | |||||||
18303 | for (unsigned i = 0, e = Elements.size(); i != e; ++i) { | ||||||
18304 | EnumConstantDecl *ECD = | ||||||
18305 | cast_or_null<EnumConstantDecl>(Elements[i]); | ||||||
18306 | if (!ECD) continue; // Already issued a diagnostic. | ||||||
18307 | |||||||
18308 | const llvm::APSInt &InitVal = ECD->getInitVal(); | ||||||
18309 | |||||||
18310 | // Keep track of the size of positive and negative values. | ||||||
18311 | if (InitVal.isUnsigned() || InitVal.isNonNegative()) | ||||||
18312 | NumPositiveBits = std::max(NumPositiveBits, | ||||||
18313 | (unsigned)InitVal.getActiveBits()); | ||||||
18314 | else | ||||||
18315 | NumNegativeBits = std::max(NumNegativeBits, | ||||||
18316 | (unsigned)InitVal.getMinSignedBits()); | ||||||
18317 | |||||||
18318 | // Keep track of whether every enum element has type int (very common). | ||||||
18319 | if (AllElementsInt) | ||||||
18320 | AllElementsInt = ECD->getType() == Context.IntTy; | ||||||
18321 | } | ||||||
18322 | |||||||
18323 | // Figure out the type that should be used for this enum. | ||||||
18324 | QualType BestType; | ||||||
18325 | unsigned BestWidth; | ||||||
18326 | |||||||
18327 | // C++0x N3000 [conv.prom]p3: | ||||||
18328 | // An rvalue of an unscoped enumeration type whose underlying | ||||||
18329 | // type is not fixed can be converted to an rvalue of the first | ||||||
18330 | // of the following types that can represent all the values of | ||||||
18331 | // the enumeration: int, unsigned int, long int, unsigned long | ||||||
18332 | // int, long long int, or unsigned long long int. | ||||||
18333 | // C99 6.4.4.3p2: | ||||||
18334 | // An identifier declared as an enumeration constant has type int. | ||||||
18335 | // The C99 rule is modified by a gcc extension | ||||||
18336 | QualType BestPromotionType; | ||||||
18337 | |||||||
18338 | bool Packed = Enum->hasAttr<PackedAttr>(); | ||||||
18339 | // -fshort-enums is the equivalent to specifying the packed attribute on all | ||||||
18340 | // enum definitions. | ||||||
18341 | if (LangOpts.ShortEnums) | ||||||
18342 | Packed = true; | ||||||
18343 | |||||||
18344 | // If the enum already has a type because it is fixed or dictated by the | ||||||
18345 | // target, promote that type instead of analyzing the enumerators. | ||||||
18346 | if (Enum->isComplete()) { | ||||||
18347 | BestType = Enum->getIntegerType(); | ||||||
18348 | if (BestType->isPromotableIntegerType()) | ||||||
18349 | BestPromotionType = Context.getPromotedIntegerType(BestType); | ||||||
18350 | else | ||||||
18351 | BestPromotionType = BestType; | ||||||
18352 | |||||||
18353 | BestWidth = Context.getIntWidth(BestType); | ||||||
18354 | } | ||||||
18355 | else if (NumNegativeBits) { | ||||||
18356 | // If there is a negative value, figure out the smallest integer type (of | ||||||
18357 | // int/long/longlong) that fits. | ||||||
18358 | // If it's packed, check also if it fits a char or a short. | ||||||
18359 | if (Packed && NumNegativeBits <= CharWidth && NumPositiveBits < CharWidth) { | ||||||
18360 | BestType = Context.SignedCharTy; | ||||||
18361 | BestWidth = CharWidth; | ||||||
18362 | } else if (Packed && NumNegativeBits <= ShortWidth && | ||||||
18363 | NumPositiveBits < ShortWidth) { | ||||||
18364 | BestType = Context.ShortTy; | ||||||
18365 | BestWidth = ShortWidth; | ||||||
18366 | } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) { | ||||||
18367 | BestType = Context.IntTy; | ||||||
18368 | BestWidth = IntWidth; | ||||||
18369 | } else { | ||||||
18370 | BestWidth = Context.getTargetInfo().getLongWidth(); | ||||||
18371 | |||||||
18372 | if (NumNegativeBits <= BestWidth && NumPositiveBits < BestWidth) { | ||||||
18373 | BestType = Context.LongTy; | ||||||
18374 | } else { | ||||||
18375 | BestWidth = Context.getTargetInfo().getLongLongWidth(); | ||||||
18376 | |||||||
18377 | if (NumNegativeBits > BestWidth || NumPositiveBits >= BestWidth) | ||||||
18378 | Diag(Enum->getLocation(), diag::ext_enum_too_large); | ||||||
18379 | BestType = Context.LongLongTy; | ||||||
18380 | } | ||||||
18381 | } | ||||||
18382 | BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : BestType); | ||||||
18383 | } else { | ||||||
18384 | // If there is no negative value, figure out the smallest type that fits | ||||||
18385 | // all of the enumerator values. | ||||||
18386 | // If it's packed, check also if it fits a char or a short. | ||||||
18387 | if (Packed && NumPositiveBits <= CharWidth) { | ||||||
18388 | BestType = Context.UnsignedCharTy; | ||||||
18389 | BestPromotionType = Context.IntTy; | ||||||
18390 | BestWidth = CharWidth; | ||||||
18391 | } else if (Packed && NumPositiveBits <= ShortWidth) { | ||||||
18392 | BestType = Context.UnsignedShortTy; | ||||||
18393 | BestPromotionType = Context.IntTy; | ||||||
18394 | BestWidth = ShortWidth; | ||||||
18395 | } else if (NumPositiveBits <= IntWidth) { | ||||||
18396 | BestType = Context.UnsignedIntTy; | ||||||
18397 | BestWidth = IntWidth; | ||||||
18398 | BestPromotionType | ||||||
18399 | = (NumPositiveBits == BestWidth || !getLangOpts().CPlusPlus) | ||||||
18400 | ? Context.UnsignedIntTy : Context.IntTy; | ||||||
18401 | } else if (NumPositiveBits <= | ||||||
18402 | (BestWidth = Context.getTargetInfo().getLongWidth())) { | ||||||
18403 | BestType = Context.UnsignedLongTy; | ||||||
18404 | BestPromotionType | ||||||
18405 | = (NumPositiveBits == BestWidth || !getLangOpts().CPlusPlus) | ||||||
18406 | ? Context.UnsignedLongTy : Context.LongTy; | ||||||
18407 | } else { | ||||||
18408 | BestWidth = Context.getTargetInfo().getLongLongWidth(); | ||||||
18409 | assert(NumPositiveBits <= BestWidth &&(static_cast <bool> (NumPositiveBits <= BestWidth && "How could an initializer get larger than ULL?") ? void (0) : __assert_fail ("NumPositiveBits <= BestWidth && \"How could an initializer get larger than ULL?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 18410, __extension__ __PRETTY_FUNCTION__)) | ||||||
18410 | "How could an initializer get larger than ULL?")(static_cast <bool> (NumPositiveBits <= BestWidth && "How could an initializer get larger than ULL?") ? void (0) : __assert_fail ("NumPositiveBits <= BestWidth && \"How could an initializer get larger than ULL?\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 18410, __extension__ __PRETTY_FUNCTION__)); | ||||||
18411 | BestType = Context.UnsignedLongLongTy; | ||||||
18412 | BestPromotionType | ||||||
18413 | = (NumPositiveBits == BestWidth || !getLangOpts().CPlusPlus) | ||||||
18414 | ? Context.UnsignedLongLongTy : Context.LongLongTy; | ||||||
18415 | } | ||||||
18416 | } | ||||||
18417 | |||||||
18418 | // Loop over all of the enumerator constants, changing their types to match | ||||||
18419 | // the type of the enum if needed. | ||||||
18420 | for (auto *D : Elements) { | ||||||
18421 | auto *ECD = cast_or_null<EnumConstantDecl>(D); | ||||||
18422 | if (!ECD) continue; // Already issued a diagnostic. | ||||||
18423 | |||||||
18424 | // Standard C says the enumerators have int type, but we allow, as an | ||||||
18425 | // extension, the enumerators to be larger than int size. If each | ||||||
18426 | // enumerator value fits in an int, type it as an int, otherwise type it the | ||||||
18427 | // same as the enumerator decl itself. This means that in "enum { X = 1U }" | ||||||
18428 | // that X has type 'int', not 'unsigned'. | ||||||
18429 | |||||||
18430 | // Determine whether the value fits into an int. | ||||||
18431 | llvm::APSInt InitVal = ECD->getInitVal(); | ||||||
18432 | |||||||
18433 | // If it fits into an integer type, force it. Otherwise force it to match | ||||||
18434 | // the enum decl type. | ||||||
18435 | QualType NewTy; | ||||||
18436 | unsigned NewWidth; | ||||||
18437 | bool NewSign; | ||||||
18438 | if (!getLangOpts().CPlusPlus && | ||||||
18439 | !Enum->isFixed() && | ||||||
18440 | isRepresentableIntegerValue(Context, InitVal, Context.IntTy)) { | ||||||
18441 | NewTy = Context.IntTy; | ||||||
18442 | NewWidth = IntWidth; | ||||||
18443 | NewSign = true; | ||||||
18444 | } else if (ECD->getType() == BestType) { | ||||||
18445 | // Already the right type! | ||||||
18446 | if (getLangOpts().CPlusPlus) | ||||||
18447 | // C++ [dcl.enum]p4: Following the closing brace of an | ||||||
18448 | // enum-specifier, each enumerator has the type of its | ||||||
18449 | // enumeration. | ||||||
18450 | ECD->setType(EnumType); | ||||||
18451 | continue; | ||||||
18452 | } else { | ||||||
18453 | NewTy = BestType; | ||||||
18454 | NewWidth = BestWidth; | ||||||
18455 | NewSign = BestType->isSignedIntegerOrEnumerationType(); | ||||||
18456 | } | ||||||
18457 | |||||||
18458 | // Adjust the APSInt value. | ||||||
18459 | InitVal = InitVal.extOrTrunc(NewWidth); | ||||||
18460 | InitVal.setIsSigned(NewSign); | ||||||
18461 | ECD->setInitVal(InitVal); | ||||||
18462 | |||||||
18463 | // Adjust the Expr initializer and type. | ||||||
18464 | if (ECD->getInitExpr() && | ||||||
18465 | !Context.hasSameType(NewTy, ECD->getInitExpr()->getType())) | ||||||
18466 | ECD->setInitExpr(ImplicitCastExpr::Create( | ||||||
18467 | Context, NewTy, CK_IntegralCast, ECD->getInitExpr(), | ||||||
18468 | /*base paths*/ nullptr, VK_PRValue, FPOptionsOverride())); | ||||||
18469 | if (getLangOpts().CPlusPlus) | ||||||
18470 | // C++ [dcl.enum]p4: Following the closing brace of an | ||||||
18471 | // enum-specifier, each enumerator has the type of its | ||||||
18472 | // enumeration. | ||||||
18473 | ECD->setType(EnumType); | ||||||
18474 | else | ||||||
18475 | ECD->setType(NewTy); | ||||||
18476 | } | ||||||
18477 | |||||||
18478 | Enum->completeDefinition(BestType, BestPromotionType, | ||||||
18479 | NumPositiveBits, NumNegativeBits); | ||||||
18480 | |||||||
18481 | CheckForDuplicateEnumValues(*this, Elements, Enum, EnumType); | ||||||
18482 | |||||||
18483 | if (Enum->isClosedFlag()) { | ||||||
18484 | for (Decl *D : Elements) { | ||||||
18485 | EnumConstantDecl *ECD = cast_or_null<EnumConstantDecl>(D); | ||||||
18486 | if (!ECD) continue; // Already issued a diagnostic. | ||||||
18487 | |||||||
18488 | llvm::APSInt InitVal = ECD->getInitVal(); | ||||||
18489 | if (InitVal != 0 && !InitVal.isPowerOf2() && | ||||||
18490 | !IsValueInFlagEnum(Enum, InitVal, true)) | ||||||
18491 | Diag(ECD->getLocation(), diag::warn_flag_enum_constant_out_of_range) | ||||||
18492 | << ECD << Enum; | ||||||
18493 | } | ||||||
18494 | } | ||||||
18495 | |||||||
18496 | // Now that the enum type is defined, ensure it's not been underaligned. | ||||||
18497 | if (Enum->hasAttrs()) | ||||||
18498 | CheckAlignasUnderalignment(Enum); | ||||||
18499 | } | ||||||
18500 | |||||||
18501 | Decl *Sema::ActOnFileScopeAsmDecl(Expr *expr, | ||||||
18502 | SourceLocation StartLoc, | ||||||
18503 | SourceLocation EndLoc) { | ||||||
18504 | StringLiteral *AsmString = cast<StringLiteral>(expr); | ||||||
18505 | |||||||
18506 | FileScopeAsmDecl *New = FileScopeAsmDecl::Create(Context, CurContext, | ||||||
18507 | AsmString, StartLoc, | ||||||
18508 | EndLoc); | ||||||
18509 | CurContext->addDecl(New); | ||||||
18510 | return New; | ||||||
18511 | } | ||||||
18512 | |||||||
18513 | void Sema::ActOnPragmaRedefineExtname(IdentifierInfo* Name, | ||||||
18514 | IdentifierInfo* AliasName, | ||||||
18515 | SourceLocation PragmaLoc, | ||||||
18516 | SourceLocation NameLoc, | ||||||
18517 | SourceLocation AliasNameLoc) { | ||||||
18518 | NamedDecl *PrevDecl = LookupSingleName(TUScope, Name, NameLoc, | ||||||
18519 | LookupOrdinaryName); | ||||||
18520 | AttributeCommonInfo Info(AliasName, SourceRange(AliasNameLoc), | ||||||
18521 | AttributeCommonInfo::AS_Pragma); | ||||||
18522 | AsmLabelAttr *Attr = AsmLabelAttr::CreateImplicit( | ||||||
18523 | Context, AliasName->getName(), /*LiteralLabel=*/true, Info); | ||||||
18524 | |||||||
18525 | // If a declaration that: | ||||||
18526 | // 1) declares a function or a variable | ||||||
18527 | // 2) has external linkage | ||||||
18528 | // already exists, add a label attribute to it. | ||||||
18529 | if (PrevDecl && (isa<FunctionDecl>(PrevDecl) || isa<VarDecl>(PrevDecl))) { | ||||||
18530 | if (isDeclExternC(PrevDecl)) | ||||||
18531 | PrevDecl->addAttr(Attr); | ||||||
18532 | else | ||||||
18533 | Diag(PrevDecl->getLocation(), diag::warn_redefine_extname_not_applied) | ||||||
18534 | << /*Variable*/(isa<FunctionDecl>(PrevDecl) ? 0 : 1) << PrevDecl; | ||||||
18535 | // Otherwise, add a label atttibute to ExtnameUndeclaredIdentifiers. | ||||||
18536 | } else | ||||||
18537 | (void)ExtnameUndeclaredIdentifiers.insert(std::make_pair(Name, Attr)); | ||||||
18538 | } | ||||||
18539 | |||||||
18540 | void Sema::ActOnPragmaWeakID(IdentifierInfo* Name, | ||||||
18541 | SourceLocation PragmaLoc, | ||||||
18542 | SourceLocation NameLoc) { | ||||||
18543 | Decl *PrevDecl = LookupSingleName(TUScope, Name, NameLoc, LookupOrdinaryName); | ||||||
18544 | |||||||
18545 | if (PrevDecl) { | ||||||
18546 | PrevDecl->addAttr(WeakAttr::CreateImplicit(Context, PragmaLoc, AttributeCommonInfo::AS_Pragma)); | ||||||
18547 | } else { | ||||||
18548 | (void)WeakUndeclaredIdentifiers.insert( | ||||||
18549 | std::pair<IdentifierInfo*,WeakInfo> | ||||||
18550 | (Name, WeakInfo((IdentifierInfo*)nullptr, NameLoc))); | ||||||
18551 | } | ||||||
18552 | } | ||||||
18553 | |||||||
18554 | void Sema::ActOnPragmaWeakAlias(IdentifierInfo* Name, | ||||||
18555 | IdentifierInfo* AliasName, | ||||||
18556 | SourceLocation PragmaLoc, | ||||||
18557 | SourceLocation NameLoc, | ||||||
18558 | SourceLocation AliasNameLoc) { | ||||||
18559 | Decl *PrevDecl = LookupSingleName(TUScope, AliasName, AliasNameLoc, | ||||||
18560 | LookupOrdinaryName); | ||||||
18561 | WeakInfo W = WeakInfo(Name, NameLoc); | ||||||
18562 | |||||||
18563 | if (PrevDecl && (isa<FunctionDecl>(PrevDecl) || isa<VarDecl>(PrevDecl))) { | ||||||
18564 | if (!PrevDecl->hasAttr<AliasAttr>()) | ||||||
18565 | if (NamedDecl *ND = dyn_cast<NamedDecl>(PrevDecl)) | ||||||
18566 | DeclApplyPragmaWeak(TUScope, ND, W); | ||||||
18567 | } else { | ||||||
18568 | (void)WeakUndeclaredIdentifiers.insert( | ||||||
18569 | std::pair<IdentifierInfo*,WeakInfo>(AliasName, W)); | ||||||
18570 | } | ||||||
18571 | } | ||||||
18572 | |||||||
18573 | Decl *Sema::getObjCDeclContext() const { | ||||||
18574 | return (dyn_cast_or_null<ObjCContainerDecl>(CurContext)); | ||||||
18575 | } | ||||||
18576 | |||||||
18577 | Sema::FunctionEmissionStatus Sema::getEmissionStatus(FunctionDecl *FD, | ||||||
18578 | bool Final) { | ||||||
18579 | assert(FD && "Expected non-null FunctionDecl")(static_cast <bool> (FD && "Expected non-null FunctionDecl" ) ? void (0) : __assert_fail ("FD && \"Expected non-null FunctionDecl\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/lib/Sema/SemaDecl.cpp" , 18579, __extension__ __PRETTY_FUNCTION__)); | ||||||
18580 | |||||||
18581 | // SYCL functions can be template, so we check if they have appropriate | ||||||
18582 | // attribute prior to checking if it is a template. | ||||||
18583 | if (LangOpts.SYCLIsDevice && FD->hasAttr<SYCLKernelAttr>()) | ||||||
18584 | return FunctionEmissionStatus::Emitted; | ||||||
18585 | |||||||
18586 | // Templates are emitted when they're instantiated. | ||||||
18587 | if (FD->isDependentContext()) | ||||||
18588 | return FunctionEmissionStatus::TemplateDiscarded; | ||||||
18589 | |||||||
18590 | // Check whether this function is an externally visible definition. | ||||||
18591 | auto IsEmittedForExternalSymbol = [this, FD]() { | ||||||
18592 | // We have to check the GVA linkage of the function's *definition* -- if we | ||||||
18593 | // only have a declaration, we don't know whether or not the function will | ||||||
18594 | // be emitted, because (say) the definition could include "inline". | ||||||
18595 | FunctionDecl *Def = FD->getDefinition(); | ||||||
18596 | |||||||
18597 | return Def && !isDiscardableGVALinkage( | ||||||
18598 | getASTContext().GetGVALinkageForFunction(Def)); | ||||||
18599 | }; | ||||||
18600 | |||||||
18601 | if (LangOpts.OpenMPIsDevice) { | ||||||
18602 | // In OpenMP device mode we will not emit host only functions, or functions | ||||||
18603 | // we don't need due to their linkage. | ||||||
18604 | Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy = | ||||||
18605 | OMPDeclareTargetDeclAttr::getDeviceType(FD->getCanonicalDecl()); | ||||||
18606 | // DevTy may be changed later by | ||||||
18607 | // #pragma omp declare target to(*) device_type(*). | ||||||
18608 | // Therefore DevTy having no value does not imply host. The emission status | ||||||
18609 | // will be checked again at the end of compilation unit with Final = true. | ||||||
18610 | if (DevTy.hasValue()) | ||||||
18611 | if (*DevTy == OMPDeclareTargetDeclAttr::DT_Host) | ||||||
18612 | return FunctionEmissionStatus::OMPDiscarded; | ||||||
18613 | // If we have an explicit value for the device type, or we are in a target | ||||||
18614 | // declare context, we need to emit all extern and used symbols. | ||||||
18615 | if (isInOpenMPDeclareTargetContext() || DevTy.hasValue()) | ||||||
18616 | if (IsEmittedForExternalSymbol()) | ||||||
18617 | return FunctionEmissionStatus::Emitted; | ||||||
18618 | // Device mode only emits what it must, if it wasn't tagged yet and needed, | ||||||
18619 | // we'll omit it. | ||||||
18620 | if (Final) | ||||||
18621 | return FunctionEmissionStatus::OMPDiscarded; | ||||||
18622 | } else if (LangOpts.OpenMP > 45) { | ||||||
18623 | // In OpenMP host compilation prior to 5.0 everything was an emitted host | ||||||
18624 | // function. In 5.0, no_host was introduced which might cause a function to | ||||||
18625 | // be ommitted. | ||||||
18626 | Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy = | ||||||
18627 | OMPDeclareTargetDeclAttr::getDeviceType(FD->getCanonicalDecl()); | ||||||
18628 | if (DevTy.hasValue()) | ||||||
18629 | if (*DevTy == OMPDeclareTargetDeclAttr::DT_NoHost) | ||||||
18630 | return FunctionEmissionStatus::OMPDiscarded; | ||||||
18631 | } | ||||||
18632 | |||||||
18633 | if (Final && LangOpts.OpenMP && !LangOpts.CUDA) | ||||||
18634 | return FunctionEmissionStatus::Emitted; | ||||||
18635 | |||||||
18636 | if (LangOpts.CUDA) { | ||||||
18637 | // When compiling for device, host functions are never emitted. Similarly, | ||||||
18638 | // when compiling for host, device and global functions are never emitted. | ||||||
18639 | // (Technically, we do emit a host-side stub for global functions, but this | ||||||
18640 | // doesn't count for our purposes here.) | ||||||
18641 | Sema::CUDAFunctionTarget T = IdentifyCUDATarget(FD); | ||||||
18642 | if (LangOpts.CUDAIsDevice && T == Sema::CFT_Host) | ||||||
18643 | return FunctionEmissionStatus::CUDADiscarded; | ||||||
18644 | if (!LangOpts.CUDAIsDevice && | ||||||
18645 | (T == Sema::CFT_Device || T == Sema::CFT_Global)) | ||||||
18646 | return FunctionEmissionStatus::CUDADiscarded; | ||||||
18647 | |||||||
18648 | if (IsEmittedForExternalSymbol()) | ||||||
18649 | return FunctionEmissionStatus::Emitted; | ||||||
18650 | } | ||||||
18651 | |||||||
18652 | // Otherwise, the function is known-emitted if it's in our set of | ||||||
18653 | // known-emitted functions. | ||||||
18654 | return FunctionEmissionStatus::Unknown; | ||||||
18655 | } | ||||||
18656 | |||||||
18657 | bool Sema::shouldIgnoreInHostDeviceCheck(FunctionDecl *Callee) { | ||||||
18658 | // Host-side references to a __global__ function refer to the stub, so the | ||||||
18659 | // function itself is never emitted and therefore should not be marked. | ||||||
18660 | // If we have host fn calls kernel fn calls host+device, the HD function | ||||||
18661 | // does not get instantiated on the host. We model this by omitting at the | ||||||
18662 | // call to the kernel from the callgraph. This ensures that, when compiling | ||||||
18663 | // for host, only HD functions actually called from the host get marked as | ||||||
18664 | // known-emitted. | ||||||
18665 | return LangOpts.CUDA && !LangOpts.CUDAIsDevice && | ||||||
18666 | IdentifyCUDATarget(Callee) == CFT_Global; | ||||||
18667 | } |
1 | //===- DeclBase.h - Base Classes for representing declarations --*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file defines the Decl and DeclContext interfaces. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_CLANG_AST_DECLBASE_H |
14 | #define LLVM_CLANG_AST_DECLBASE_H |
15 | |
16 | #include "clang/AST/ASTDumperUtils.h" |
17 | #include "clang/AST/AttrIterator.h" |
18 | #include "clang/AST/DeclarationName.h" |
19 | #include "clang/Basic/IdentifierTable.h" |
20 | #include "clang/Basic/LLVM.h" |
21 | #include "clang/Basic/SourceLocation.h" |
22 | #include "clang/Basic/Specifiers.h" |
23 | #include "llvm/ADT/ArrayRef.h" |
24 | #include "llvm/ADT/PointerIntPair.h" |
25 | #include "llvm/ADT/PointerUnion.h" |
26 | #include "llvm/ADT/iterator.h" |
27 | #include "llvm/ADT/iterator_range.h" |
28 | #include "llvm/Support/Casting.h" |
29 | #include "llvm/Support/Compiler.h" |
30 | #include "llvm/Support/PrettyStackTrace.h" |
31 | #include "llvm/Support/VersionTuple.h" |
32 | #include <algorithm> |
33 | #include <cassert> |
34 | #include <cstddef> |
35 | #include <iterator> |
36 | #include <string> |
37 | #include <type_traits> |
38 | #include <utility> |
39 | |
40 | namespace clang { |
41 | |
42 | class ASTContext; |
43 | class ASTMutationListener; |
44 | class Attr; |
45 | class BlockDecl; |
46 | class DeclContext; |
47 | class ExternalSourceSymbolAttr; |
48 | class FunctionDecl; |
49 | class FunctionType; |
50 | class IdentifierInfo; |
51 | enum Linkage : unsigned char; |
52 | class LinkageSpecDecl; |
53 | class Module; |
54 | class NamedDecl; |
55 | class ObjCCategoryDecl; |
56 | class ObjCCategoryImplDecl; |
57 | class ObjCContainerDecl; |
58 | class ObjCImplDecl; |
59 | class ObjCImplementationDecl; |
60 | class ObjCInterfaceDecl; |
61 | class ObjCMethodDecl; |
62 | class ObjCProtocolDecl; |
63 | struct PrintingPolicy; |
64 | class RecordDecl; |
65 | class SourceManager; |
66 | class Stmt; |
67 | class StoredDeclsMap; |
68 | class TemplateDecl; |
69 | class TemplateParameterList; |
70 | class TranslationUnitDecl; |
71 | class UsingDirectiveDecl; |
72 | |
73 | /// Captures the result of checking the availability of a |
74 | /// declaration. |
75 | enum AvailabilityResult { |
76 | AR_Available = 0, |
77 | AR_NotYetIntroduced, |
78 | AR_Deprecated, |
79 | AR_Unavailable |
80 | }; |
81 | |
82 | /// Decl - This represents one declaration (or definition), e.g. a variable, |
83 | /// typedef, function, struct, etc. |
84 | /// |
85 | /// Note: There are objects tacked on before the *beginning* of Decl |
86 | /// (and its subclasses) in its Decl::operator new(). Proper alignment |
87 | /// of all subclasses (not requiring more than the alignment of Decl) is |
88 | /// asserted in DeclBase.cpp. |
89 | class alignas(8) Decl { |
90 | public: |
91 | /// Lists the kind of concrete classes of Decl. |
92 | enum Kind { |
93 | #define DECL(DERIVED, BASE) DERIVED, |
94 | #define ABSTRACT_DECL(DECL) |
95 | #define DECL_RANGE(BASE, START, END) \ |
96 | first##BASE = START, last##BASE = END, |
97 | #define LAST_DECL_RANGE(BASE, START, END) \ |
98 | first##BASE = START, last##BASE = END |
99 | #include "clang/AST/DeclNodes.inc" |
100 | }; |
101 | |
102 | /// A placeholder type used to construct an empty shell of a |
103 | /// decl-derived type that will be filled in later (e.g., by some |
104 | /// deserialization method). |
105 | struct EmptyShell {}; |
106 | |
107 | /// IdentifierNamespace - The different namespaces in which |
108 | /// declarations may appear. According to C99 6.2.3, there are |
109 | /// four namespaces, labels, tags, members and ordinary |
110 | /// identifiers. C++ describes lookup completely differently: |
111 | /// certain lookups merely "ignore" certain kinds of declarations, |
112 | /// usually based on whether the declaration is of a type, etc. |
113 | /// |
114 | /// These are meant as bitmasks, so that searches in |
115 | /// C++ can look into the "tag" namespace during ordinary lookup. |
116 | /// |
117 | /// Decl currently provides 15 bits of IDNS bits. |
118 | enum IdentifierNamespace { |
119 | /// Labels, declared with 'x:' and referenced with 'goto x'. |
120 | IDNS_Label = 0x0001, |
121 | |
122 | /// Tags, declared with 'struct foo;' and referenced with |
123 | /// 'struct foo'. All tags are also types. This is what |
124 | /// elaborated-type-specifiers look for in C. |
125 | /// This also contains names that conflict with tags in the |
126 | /// same scope but that are otherwise ordinary names (non-type |
127 | /// template parameters and indirect field declarations). |
128 | IDNS_Tag = 0x0002, |
129 | |
130 | /// Types, declared with 'struct foo', typedefs, etc. |
131 | /// This is what elaborated-type-specifiers look for in C++, |
132 | /// but note that it's ill-formed to find a non-tag. |
133 | IDNS_Type = 0x0004, |
134 | |
135 | /// Members, declared with object declarations within tag |
136 | /// definitions. In C, these can only be found by "qualified" |
137 | /// lookup in member expressions. In C++, they're found by |
138 | /// normal lookup. |
139 | IDNS_Member = 0x0008, |
140 | |
141 | /// Namespaces, declared with 'namespace foo {}'. |
142 | /// Lookup for nested-name-specifiers find these. |
143 | IDNS_Namespace = 0x0010, |
144 | |
145 | /// Ordinary names. In C, everything that's not a label, tag, |
146 | /// member, or function-local extern ends up here. |
147 | IDNS_Ordinary = 0x0020, |
148 | |
149 | /// Objective C \@protocol. |
150 | IDNS_ObjCProtocol = 0x0040, |
151 | |
152 | /// This declaration is a friend function. A friend function |
153 | /// declaration is always in this namespace but may also be in |
154 | /// IDNS_Ordinary if it was previously declared. |
155 | IDNS_OrdinaryFriend = 0x0080, |
156 | |
157 | /// This declaration is a friend class. A friend class |
158 | /// declaration is always in this namespace but may also be in |
159 | /// IDNS_Tag|IDNS_Type if it was previously declared. |
160 | IDNS_TagFriend = 0x0100, |
161 | |
162 | /// This declaration is a using declaration. A using declaration |
163 | /// *introduces* a number of other declarations into the current |
164 | /// scope, and those declarations use the IDNS of their targets, |
165 | /// but the actual using declarations go in this namespace. |
166 | IDNS_Using = 0x0200, |
167 | |
168 | /// This declaration is a C++ operator declared in a non-class |
169 | /// context. All such operators are also in IDNS_Ordinary. |
170 | /// C++ lexical operator lookup looks for these. |
171 | IDNS_NonMemberOperator = 0x0400, |
172 | |
173 | /// This declaration is a function-local extern declaration of a |
174 | /// variable or function. This may also be IDNS_Ordinary if it |
175 | /// has been declared outside any function. These act mostly like |
176 | /// invisible friend declarations, but are also visible to unqualified |
177 | /// lookup within the scope of the declaring function. |
178 | IDNS_LocalExtern = 0x0800, |
179 | |
180 | /// This declaration is an OpenMP user defined reduction construction. |
181 | IDNS_OMPReduction = 0x1000, |
182 | |
183 | /// This declaration is an OpenMP user defined mapper. |
184 | IDNS_OMPMapper = 0x2000, |
185 | }; |
186 | |
187 | /// ObjCDeclQualifier - 'Qualifiers' written next to the return and |
188 | /// parameter types in method declarations. Other than remembering |
189 | /// them and mangling them into the method's signature string, these |
190 | /// are ignored by the compiler; they are consumed by certain |
191 | /// remote-messaging frameworks. |
192 | /// |
193 | /// in, inout, and out are mutually exclusive and apply only to |
194 | /// method parameters. bycopy and byref are mutually exclusive and |
195 | /// apply only to method parameters (?). oneway applies only to |
196 | /// results. All of these expect their corresponding parameter to |
197 | /// have a particular type. None of this is currently enforced by |
198 | /// clang. |
199 | /// |
200 | /// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier. |
201 | enum ObjCDeclQualifier { |
202 | OBJC_TQ_None = 0x0, |
203 | OBJC_TQ_In = 0x1, |
204 | OBJC_TQ_Inout = 0x2, |
205 | OBJC_TQ_Out = 0x4, |
206 | OBJC_TQ_Bycopy = 0x8, |
207 | OBJC_TQ_Byref = 0x10, |
208 | OBJC_TQ_Oneway = 0x20, |
209 | |
210 | /// The nullability qualifier is set when the nullability of the |
211 | /// result or parameter was expressed via a context-sensitive |
212 | /// keyword. |
213 | OBJC_TQ_CSNullability = 0x40 |
214 | }; |
215 | |
216 | /// The kind of ownership a declaration has, for visibility purposes. |
217 | /// This enumeration is designed such that higher values represent higher |
218 | /// levels of name hiding. |
219 | enum class ModuleOwnershipKind : unsigned { |
220 | /// This declaration is not owned by a module. |
221 | Unowned, |
222 | |
223 | /// This declaration has an owning module, but is globally visible |
224 | /// (typically because its owning module is visible and we know that |
225 | /// modules cannot later become hidden in this compilation). |
226 | /// After serialization and deserialization, this will be converted |
227 | /// to VisibleWhenImported. |
228 | Visible, |
229 | |
230 | /// This declaration has an owning module, and is visible when that |
231 | /// module is imported. |
232 | VisibleWhenImported, |
233 | |
234 | /// This declaration has an owning module, but is only visible to |
235 | /// lookups that occur within that module. |
236 | ModulePrivate |
237 | }; |
238 | |
239 | protected: |
240 | /// The next declaration within the same lexical |
241 | /// DeclContext. These pointers form the linked list that is |
242 | /// traversed via DeclContext's decls_begin()/decls_end(). |
243 | /// |
244 | /// The extra two bits are used for the ModuleOwnershipKind. |
245 | llvm::PointerIntPair<Decl *, 2, ModuleOwnershipKind> NextInContextAndBits; |
246 | |
247 | private: |
248 | friend class DeclContext; |
249 | |
250 | struct MultipleDC { |
251 | DeclContext *SemanticDC; |
252 | DeclContext *LexicalDC; |
253 | }; |
254 | |
255 | /// DeclCtx - Holds either a DeclContext* or a MultipleDC*. |
256 | /// For declarations that don't contain C++ scope specifiers, it contains |
257 | /// the DeclContext where the Decl was declared. |
258 | /// For declarations with C++ scope specifiers, it contains a MultipleDC* |
259 | /// with the context where it semantically belongs (SemanticDC) and the |
260 | /// context where it was lexically declared (LexicalDC). |
261 | /// e.g.: |
262 | /// |
263 | /// namespace A { |
264 | /// void f(); // SemanticDC == LexicalDC == 'namespace A' |
265 | /// } |
266 | /// void A::f(); // SemanticDC == namespace 'A' |
267 | /// // LexicalDC == global namespace |
268 | llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx; |
269 | |
270 | bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); } |
271 | bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); } |
272 | |
273 | MultipleDC *getMultipleDC() const { |
274 | return DeclCtx.get<MultipleDC*>(); |
275 | } |
276 | |
277 | DeclContext *getSemanticDC() const { |
278 | return DeclCtx.get<DeclContext*>(); |
279 | } |
280 | |
281 | /// Loc - The location of this decl. |
282 | SourceLocation Loc; |
283 | |
284 | /// DeclKind - This indicates which class this is. |
285 | unsigned DeclKind : 7; |
286 | |
287 | /// InvalidDecl - This indicates a semantic error occurred. |
288 | unsigned InvalidDecl : 1; |
289 | |
290 | /// HasAttrs - This indicates whether the decl has attributes or not. |
291 | unsigned HasAttrs : 1; |
292 | |
293 | /// Implicit - Whether this declaration was implicitly generated by |
294 | /// the implementation rather than explicitly written by the user. |
295 | unsigned Implicit : 1; |
296 | |
297 | /// Whether this declaration was "used", meaning that a definition is |
298 | /// required. |
299 | unsigned Used : 1; |
300 | |
301 | /// Whether this declaration was "referenced". |
302 | /// The difference with 'Used' is whether the reference appears in a |
303 | /// evaluated context or not, e.g. functions used in uninstantiated templates |
304 | /// are regarded as "referenced" but not "used". |
305 | unsigned Referenced : 1; |
306 | |
307 | /// Whether this declaration is a top-level declaration (function, |
308 | /// global variable, etc.) that is lexically inside an objc container |
309 | /// definition. |
310 | unsigned TopLevelDeclInObjCContainer : 1; |
311 | |
312 | /// Whether statistic collection is enabled. |
313 | static bool StatisticsEnabled; |
314 | |
315 | protected: |
316 | friend class ASTDeclReader; |
317 | friend class ASTDeclWriter; |
318 | friend class ASTNodeImporter; |
319 | friend class ASTReader; |
320 | friend class CXXClassMemberWrapper; |
321 | friend class LinkageComputer; |
322 | template<typename decl_type> friend class Redeclarable; |
323 | |
324 | /// Access - Used by C++ decls for the access specifier. |
325 | // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum |
326 | unsigned Access : 2; |
327 | |
328 | /// Whether this declaration was loaded from an AST file. |
329 | unsigned FromASTFile : 1; |
330 | |
331 | /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in. |
332 | unsigned IdentifierNamespace : 14; |
333 | |
334 | /// If 0, we have not computed the linkage of this declaration. |
335 | /// Otherwise, it is the linkage + 1. |
336 | mutable unsigned CacheValidAndLinkage : 3; |
337 | |
338 | /// Allocate memory for a deserialized declaration. |
339 | /// |
340 | /// This routine must be used to allocate memory for any declaration that is |
341 | /// deserialized from a module file. |
342 | /// |
343 | /// \param Size The size of the allocated object. |
344 | /// \param Ctx The context in which we will allocate memory. |
345 | /// \param ID The global ID of the deserialized declaration. |
346 | /// \param Extra The amount of extra space to allocate after the object. |
347 | void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID, |
348 | std::size_t Extra = 0); |
349 | |
350 | /// Allocate memory for a non-deserialized declaration. |
351 | void *operator new(std::size_t Size, const ASTContext &Ctx, |
352 | DeclContext *Parent, std::size_t Extra = 0); |
353 | |
354 | private: |
355 | bool AccessDeclContextSanity() const; |
356 | |
357 | /// Get the module ownership kind to use for a local lexical child of \p DC, |
358 | /// which may be either a local or (rarely) an imported declaration. |
359 | static ModuleOwnershipKind getModuleOwnershipKindForChildOf(DeclContext *DC) { |
360 | if (DC) { |
361 | auto *D = cast<Decl>(DC); |
362 | auto MOK = D->getModuleOwnershipKind(); |
363 | if (MOK != ModuleOwnershipKind::Unowned && |
364 | (!D->isFromASTFile() || D->hasLocalOwningModuleStorage())) |
365 | return MOK; |
366 | // If D is not local and we have no local module storage, then we don't |
367 | // need to track module ownership at all. |
368 | } |
369 | return ModuleOwnershipKind::Unowned; |
370 | } |
371 | |
372 | public: |
373 | Decl() = delete; |
374 | Decl(const Decl&) = delete; |
375 | Decl(Decl &&) = delete; |
376 | Decl &operator=(const Decl&) = delete; |
377 | Decl &operator=(Decl&&) = delete; |
378 | |
379 | protected: |
380 | Decl(Kind DK, DeclContext *DC, SourceLocation L) |
381 | : NextInContextAndBits(nullptr, getModuleOwnershipKindForChildOf(DC)), |
382 | DeclCtx(DC), Loc(L), DeclKind(DK), InvalidDecl(false), HasAttrs(false), |
383 | Implicit(false), Used(false), Referenced(false), |
384 | TopLevelDeclInObjCContainer(false), Access(AS_none), FromASTFile(0), |
385 | IdentifierNamespace(getIdentifierNamespaceForKind(DK)), |
386 | CacheValidAndLinkage(0) { |
387 | if (StatisticsEnabled) add(DK); |
388 | } |
389 | |
390 | Decl(Kind DK, EmptyShell Empty) |
391 | : DeclKind(DK), InvalidDecl(false), HasAttrs(false), Implicit(false), |
392 | Used(false), Referenced(false), TopLevelDeclInObjCContainer(false), |
393 | Access(AS_none), FromASTFile(0), |
394 | IdentifierNamespace(getIdentifierNamespaceForKind(DK)), |
395 | CacheValidAndLinkage(0) { |
396 | if (StatisticsEnabled) add(DK); |
397 | } |
398 | |
399 | virtual ~Decl(); |
400 | |
401 | /// Update a potentially out-of-date declaration. |
402 | void updateOutOfDate(IdentifierInfo &II) const; |
403 | |
404 | Linkage getCachedLinkage() const { |
405 | return Linkage(CacheValidAndLinkage - 1); |
406 | } |
407 | |
408 | void setCachedLinkage(Linkage L) const { |
409 | CacheValidAndLinkage = L + 1; |
410 | } |
411 | |
412 | bool hasCachedLinkage() const { |
413 | return CacheValidAndLinkage; |
414 | } |
415 | |
416 | public: |
417 | /// Source range that this declaration covers. |
418 | virtual SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { |
419 | return SourceRange(getLocation(), getLocation()); |
420 | } |
421 | |
422 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
423 | return getSourceRange().getBegin(); |
424 | } |
425 | |
426 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
427 | return getSourceRange().getEnd(); |
428 | } |
429 | |
430 | SourceLocation getLocation() const { return Loc; } |
431 | void setLocation(SourceLocation L) { Loc = L; } |
432 | |
433 | Kind getKind() const { return static_cast<Kind>(DeclKind); } |
434 | const char *getDeclKindName() const; |
435 | |
436 | Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); } |
437 | const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();} |
438 | |
439 | DeclContext *getDeclContext() { |
440 | if (isInSemaDC()) |
441 | return getSemanticDC(); |
442 | return getMultipleDC()->SemanticDC; |
443 | } |
444 | const DeclContext *getDeclContext() const { |
445 | return const_cast<Decl*>(this)->getDeclContext(); |
446 | } |
447 | |
448 | /// Find the innermost non-closure ancestor of this declaration, |
449 | /// walking up through blocks, lambdas, etc. If that ancestor is |
450 | /// not a code context (!isFunctionOrMethod()), returns null. |
451 | /// |
452 | /// A declaration may be its own non-closure context. |
453 | Decl *getNonClosureContext(); |
454 | const Decl *getNonClosureContext() const { |
455 | return const_cast<Decl*>(this)->getNonClosureContext(); |
456 | } |
457 | |
458 | TranslationUnitDecl *getTranslationUnitDecl(); |
459 | const TranslationUnitDecl *getTranslationUnitDecl() const { |
460 | return const_cast<Decl*>(this)->getTranslationUnitDecl(); |
461 | } |
462 | |
463 | bool isInAnonymousNamespace() const; |
464 | |
465 | bool isInStdNamespace() const; |
466 | |
467 | ASTContext &getASTContext() const LLVM_READONLY__attribute__((__pure__)); |
468 | |
469 | /// Helper to get the language options from the ASTContext. |
470 | /// Defined out of line to avoid depending on ASTContext.h. |
471 | const LangOptions &getLangOpts() const LLVM_READONLY__attribute__((__pure__)); |
472 | |
473 | void setAccess(AccessSpecifier AS) { |
474 | Access = AS; |
475 | assert(AccessDeclContextSanity())(static_cast <bool> (AccessDeclContextSanity()) ? void ( 0) : __assert_fail ("AccessDeclContextSanity()", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 475, __extension__ __PRETTY_FUNCTION__)); |
476 | } |
477 | |
478 | AccessSpecifier getAccess() const { |
479 | assert(AccessDeclContextSanity())(static_cast <bool> (AccessDeclContextSanity()) ? void ( 0) : __assert_fail ("AccessDeclContextSanity()", "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 479, __extension__ __PRETTY_FUNCTION__)); |
480 | return AccessSpecifier(Access); |
481 | } |
482 | |
483 | /// Retrieve the access specifier for this declaration, even though |
484 | /// it may not yet have been properly set. |
485 | AccessSpecifier getAccessUnsafe() const { |
486 | return AccessSpecifier(Access); |
487 | } |
488 | |
489 | bool hasAttrs() const { return HasAttrs; } |
490 | |
491 | void setAttrs(const AttrVec& Attrs) { |
492 | return setAttrsImpl(Attrs, getASTContext()); |
493 | } |
494 | |
495 | AttrVec &getAttrs() { |
496 | return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs()); |
497 | } |
498 | |
499 | const AttrVec &getAttrs() const; |
500 | void dropAttrs(); |
501 | void addAttr(Attr *A); |
502 | |
503 | using attr_iterator = AttrVec::const_iterator; |
504 | using attr_range = llvm::iterator_range<attr_iterator>; |
505 | |
506 | attr_range attrs() const { |
507 | return attr_range(attr_begin(), attr_end()); |
508 | } |
509 | |
510 | attr_iterator attr_begin() const { |
511 | return hasAttrs() ? getAttrs().begin() : nullptr; |
512 | } |
513 | attr_iterator attr_end() const { |
514 | return hasAttrs() ? getAttrs().end() : nullptr; |
515 | } |
516 | |
517 | template <typename T> |
518 | void dropAttr() { |
519 | if (!HasAttrs) return; |
520 | |
521 | AttrVec &Vec = getAttrs(); |
522 | llvm::erase_if(Vec, [](Attr *A) { return isa<T>(A); }); |
523 | |
524 | if (Vec.empty()) |
525 | HasAttrs = false; |
526 | } |
527 | |
528 | template <typename T> |
529 | llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const { |
530 | return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>()); |
531 | } |
532 | |
533 | template <typename T> |
534 | specific_attr_iterator<T> specific_attr_begin() const { |
535 | return specific_attr_iterator<T>(attr_begin()); |
536 | } |
537 | |
538 | template <typename T> |
539 | specific_attr_iterator<T> specific_attr_end() const { |
540 | return specific_attr_iterator<T>(attr_end()); |
541 | } |
542 | |
543 | template<typename T> T *getAttr() const { |
544 | return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr; |
545 | } |
546 | |
547 | template<typename T> bool hasAttr() const { |
548 | return hasAttrs() && hasSpecificAttr<T>(getAttrs()); |
549 | } |
550 | |
551 | /// getMaxAlignment - return the maximum alignment specified by attributes |
552 | /// on this decl, 0 if there are none. |
553 | unsigned getMaxAlignment() const; |
554 | |
555 | /// setInvalidDecl - Indicates the Decl had a semantic error. This |
556 | /// allows for graceful error recovery. |
557 | void setInvalidDecl(bool Invalid = true); |
558 | bool isInvalidDecl() const { return (bool) InvalidDecl; } |
559 | |
560 | /// isImplicit - Indicates whether the declaration was implicitly |
561 | /// generated by the implementation. If false, this declaration |
562 | /// was written explicitly in the source code. |
563 | bool isImplicit() const { return Implicit; } |
564 | void setImplicit(bool I = true) { Implicit = I; } |
565 | |
566 | /// Whether *any* (re-)declaration of the entity was used, meaning that |
567 | /// a definition is required. |
568 | /// |
569 | /// \param CheckUsedAttr When true, also consider the "used" attribute |
570 | /// (in addition to the "used" bit set by \c setUsed()) when determining |
571 | /// whether the function is used. |
572 | bool isUsed(bool CheckUsedAttr = true) const; |
573 | |
574 | /// Set whether the declaration is used, in the sense of odr-use. |
575 | /// |
576 | /// This should only be used immediately after creating a declaration. |
577 | /// It intentionally doesn't notify any listeners. |
578 | void setIsUsed() { getCanonicalDecl()->Used = true; } |
579 | |
580 | /// Mark the declaration used, in the sense of odr-use. |
581 | /// |
582 | /// This notifies any mutation listeners in addition to setting a bit |
583 | /// indicating the declaration is used. |
584 | void markUsed(ASTContext &C); |
585 | |
586 | /// Whether any declaration of this entity was referenced. |
587 | bool isReferenced() const; |
588 | |
589 | /// Whether this declaration was referenced. This should not be relied |
590 | /// upon for anything other than debugging. |
591 | bool isThisDeclarationReferenced() const { return Referenced; } |
592 | |
593 | void setReferenced(bool R = true) { Referenced = R; } |
594 | |
595 | /// Whether this declaration is a top-level declaration (function, |
596 | /// global variable, etc.) that is lexically inside an objc container |
597 | /// definition. |
598 | bool isTopLevelDeclInObjCContainer() const { |
599 | return TopLevelDeclInObjCContainer; |
600 | } |
601 | |
602 | void setTopLevelDeclInObjCContainer(bool V = true) { |
603 | TopLevelDeclInObjCContainer = V; |
604 | } |
605 | |
606 | /// Looks on this and related declarations for an applicable |
607 | /// external source symbol attribute. |
608 | ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const; |
609 | |
610 | /// Whether this declaration was marked as being private to the |
611 | /// module in which it was defined. |
612 | bool isModulePrivate() const { |
613 | return getModuleOwnershipKind() == ModuleOwnershipKind::ModulePrivate; |
614 | } |
615 | |
616 | /// Return true if this declaration has an attribute which acts as |
617 | /// definition of the entity, such as 'alias' or 'ifunc'. |
618 | bool hasDefiningAttr() const; |
619 | |
620 | /// Return this declaration's defining attribute if it has one. |
621 | const Attr *getDefiningAttr() const; |
622 | |
623 | protected: |
624 | /// Specify that this declaration was marked as being private |
625 | /// to the module in which it was defined. |
626 | void setModulePrivate() { |
627 | // The module-private specifier has no effect on unowned declarations. |
628 | // FIXME: We should track this in some way for source fidelity. |
629 | if (getModuleOwnershipKind() == ModuleOwnershipKind::Unowned) |
630 | return; |
631 | setModuleOwnershipKind(ModuleOwnershipKind::ModulePrivate); |
632 | } |
633 | |
634 | public: |
635 | /// Set the FromASTFile flag. This indicates that this declaration |
636 | /// was deserialized and not parsed from source code and enables |
637 | /// features such as module ownership information. |
638 | void setFromASTFile() { |
639 | FromASTFile = true; |
640 | } |
641 | |
642 | /// Set the owning module ID. This may only be called for |
643 | /// deserialized Decls. |
644 | void setOwningModuleID(unsigned ID) { |
645 | assert(isFromASTFile() && "Only works on a deserialized declaration")(static_cast <bool> (isFromASTFile() && "Only works on a deserialized declaration" ) ? void (0) : __assert_fail ("isFromASTFile() && \"Only works on a deserialized declaration\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 645, __extension__ __PRETTY_FUNCTION__)); |
646 | *((unsigned*)this - 2) = ID; |
647 | } |
648 | |
649 | public: |
650 | /// Determine the availability of the given declaration. |
651 | /// |
652 | /// This routine will determine the most restrictive availability of |
653 | /// the given declaration (e.g., preferring 'unavailable' to |
654 | /// 'deprecated'). |
655 | /// |
656 | /// \param Message If non-NULL and the result is not \c |
657 | /// AR_Available, will be set to a (possibly empty) message |
658 | /// describing why the declaration has not been introduced, is |
659 | /// deprecated, or is unavailable. |
660 | /// |
661 | /// \param EnclosingVersion The version to compare with. If empty, assume the |
662 | /// deployment target version. |
663 | /// |
664 | /// \param RealizedPlatform If non-NULL and the availability result is found |
665 | /// in an available attribute it will set to the platform which is written in |
666 | /// the available attribute. |
667 | AvailabilityResult |
668 | getAvailability(std::string *Message = nullptr, |
669 | VersionTuple EnclosingVersion = VersionTuple(), |
670 | StringRef *RealizedPlatform = nullptr) const; |
671 | |
672 | /// Retrieve the version of the target platform in which this |
673 | /// declaration was introduced. |
674 | /// |
675 | /// \returns An empty version tuple if this declaration has no 'introduced' |
676 | /// availability attributes, or the version tuple that's specified in the |
677 | /// attribute otherwise. |
678 | VersionTuple getVersionIntroduced() const; |
679 | |
680 | /// Determine whether this declaration is marked 'deprecated'. |
681 | /// |
682 | /// \param Message If non-NULL and the declaration is deprecated, |
683 | /// this will be set to the message describing why the declaration |
684 | /// was deprecated (which may be empty). |
685 | bool isDeprecated(std::string *Message = nullptr) const { |
686 | return getAvailability(Message) == AR_Deprecated; |
687 | } |
688 | |
689 | /// Determine whether this declaration is marked 'unavailable'. |
690 | /// |
691 | /// \param Message If non-NULL and the declaration is unavailable, |
692 | /// this will be set to the message describing why the declaration |
693 | /// was made unavailable (which may be empty). |
694 | bool isUnavailable(std::string *Message = nullptr) const { |
695 | return getAvailability(Message) == AR_Unavailable; |
696 | } |
697 | |
698 | /// Determine whether this is a weak-imported symbol. |
699 | /// |
700 | /// Weak-imported symbols are typically marked with the |
701 | /// 'weak_import' attribute, but may also be marked with an |
702 | /// 'availability' attribute where we're targing a platform prior to |
703 | /// the introduction of this feature. |
704 | bool isWeakImported() const; |
705 | |
706 | /// Determines whether this symbol can be weak-imported, |
707 | /// e.g., whether it would be well-formed to add the weak_import |
708 | /// attribute. |
709 | /// |
710 | /// \param IsDefinition Set to \c true to indicate that this |
711 | /// declaration cannot be weak-imported because it has a definition. |
712 | bool canBeWeakImported(bool &IsDefinition) const; |
713 | |
714 | /// Determine whether this declaration came from an AST file (such as |
715 | /// a precompiled header or module) rather than having been parsed. |
716 | bool isFromASTFile() const { return FromASTFile; } |
717 | |
718 | /// Retrieve the global declaration ID associated with this |
719 | /// declaration, which specifies where this Decl was loaded from. |
720 | unsigned getGlobalID() const { |
721 | if (isFromASTFile()) |
722 | return *((const unsigned*)this - 1); |
723 | return 0; |
724 | } |
725 | |
726 | /// Retrieve the global ID of the module that owns this particular |
727 | /// declaration. |
728 | unsigned getOwningModuleID() const { |
729 | if (isFromASTFile()) |
730 | return *((const unsigned*)this - 2); |
731 | return 0; |
732 | } |
733 | |
734 | private: |
735 | Module *getOwningModuleSlow() const; |
736 | |
737 | protected: |
738 | bool hasLocalOwningModuleStorage() const; |
739 | |
740 | public: |
741 | /// Get the imported owning module, if this decl is from an imported |
742 | /// (non-local) module. |
743 | Module *getImportedOwningModule() const { |
744 | if (!isFromASTFile() || !hasOwningModule()) |
745 | return nullptr; |
746 | |
747 | return getOwningModuleSlow(); |
748 | } |
749 | |
750 | /// Get the local owning module, if known. Returns nullptr if owner is |
751 | /// not yet known or declaration is not from a module. |
752 | Module *getLocalOwningModule() const { |
753 | if (isFromASTFile() || !hasOwningModule()) |
754 | return nullptr; |
755 | |
756 | assert(hasLocalOwningModuleStorage() &&(static_cast <bool> (hasLocalOwningModuleStorage() && "owned local decl but no local module storage") ? void (0) : __assert_fail ("hasLocalOwningModuleStorage() && \"owned local decl but no local module storage\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 757, __extension__ __PRETTY_FUNCTION__)) |
757 | "owned local decl but no local module storage")(static_cast <bool> (hasLocalOwningModuleStorage() && "owned local decl but no local module storage") ? void (0) : __assert_fail ("hasLocalOwningModuleStorage() && \"owned local decl but no local module storage\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 757, __extension__ __PRETTY_FUNCTION__)); |
758 | return reinterpret_cast<Module *const *>(this)[-1]; |
759 | } |
760 | void setLocalOwningModule(Module *M) { |
761 | assert(!isFromASTFile() && hasOwningModule() &&(static_cast <bool> (!isFromASTFile() && hasOwningModule () && hasLocalOwningModuleStorage() && "should not have a cached owning module" ) ? void (0) : __assert_fail ("!isFromASTFile() && hasOwningModule() && hasLocalOwningModuleStorage() && \"should not have a cached owning module\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 763, __extension__ __PRETTY_FUNCTION__)) |
762 | hasLocalOwningModuleStorage() &&(static_cast <bool> (!isFromASTFile() && hasOwningModule () && hasLocalOwningModuleStorage() && "should not have a cached owning module" ) ? void (0) : __assert_fail ("!isFromASTFile() && hasOwningModule() && hasLocalOwningModuleStorage() && \"should not have a cached owning module\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 763, __extension__ __PRETTY_FUNCTION__)) |
763 | "should not have a cached owning module")(static_cast <bool> (!isFromASTFile() && hasOwningModule () && hasLocalOwningModuleStorage() && "should not have a cached owning module" ) ? void (0) : __assert_fail ("!isFromASTFile() && hasOwningModule() && hasLocalOwningModuleStorage() && \"should not have a cached owning module\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 763, __extension__ __PRETTY_FUNCTION__)); |
764 | reinterpret_cast<Module **>(this)[-1] = M; |
765 | } |
766 | |
767 | /// Is this declaration owned by some module? |
768 | bool hasOwningModule() const { |
769 | return getModuleOwnershipKind() != ModuleOwnershipKind::Unowned; |
770 | } |
771 | |
772 | /// Get the module that owns this declaration (for visibility purposes). |
773 | Module *getOwningModule() const { |
774 | return isFromASTFile() ? getImportedOwningModule() : getLocalOwningModule(); |
775 | } |
776 | |
777 | /// Get the module that owns this declaration for linkage purposes. |
778 | /// There only ever is such a module under the C++ Modules TS. |
779 | /// |
780 | /// \param IgnoreLinkage Ignore the linkage of the entity; assume that |
781 | /// all declarations in a global module fragment are unowned. |
782 | Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const; |
783 | |
784 | /// Determine whether this declaration is definitely visible to name lookup, |
785 | /// independent of whether the owning module is visible. |
786 | /// Note: The declaration may be visible even if this returns \c false if the |
787 | /// owning module is visible within the query context. This is a low-level |
788 | /// helper function; most code should be calling Sema::isVisible() instead. |
789 | bool isUnconditionallyVisible() const { |
790 | return (int)getModuleOwnershipKind() <= (int)ModuleOwnershipKind::Visible; |
791 | } |
792 | |
793 | /// Set that this declaration is globally visible, even if it came from a |
794 | /// module that is not visible. |
795 | void setVisibleDespiteOwningModule() { |
796 | if (!isUnconditionallyVisible()) |
797 | setModuleOwnershipKind(ModuleOwnershipKind::Visible); |
798 | } |
799 | |
800 | /// Get the kind of module ownership for this declaration. |
801 | ModuleOwnershipKind getModuleOwnershipKind() const { |
802 | return NextInContextAndBits.getInt(); |
803 | } |
804 | |
805 | /// Set whether this declaration is hidden from name lookup. |
806 | void setModuleOwnershipKind(ModuleOwnershipKind MOK) { |
807 | assert(!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned &&(static_cast <bool> (!(getModuleOwnershipKind() == ModuleOwnershipKind ::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && "no storage available for owning module for this declaration" ) ? void (0) : __assert_fail ("!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && \"no storage available for owning module for this declaration\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 810, __extension__ __PRETTY_FUNCTION__)) |
808 | MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() &&(static_cast <bool> (!(getModuleOwnershipKind() == ModuleOwnershipKind ::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && "no storage available for owning module for this declaration" ) ? void (0) : __assert_fail ("!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && \"no storage available for owning module for this declaration\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 810, __extension__ __PRETTY_FUNCTION__)) |
809 | !hasLocalOwningModuleStorage()) &&(static_cast <bool> (!(getModuleOwnershipKind() == ModuleOwnershipKind ::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && "no storage available for owning module for this declaration" ) ? void (0) : __assert_fail ("!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && \"no storage available for owning module for this declaration\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 810, __extension__ __PRETTY_FUNCTION__)) |
810 | "no storage available for owning module for this declaration")(static_cast <bool> (!(getModuleOwnershipKind() == ModuleOwnershipKind ::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && "no storage available for owning module for this declaration" ) ? void (0) : __assert_fail ("!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && \"no storage available for owning module for this declaration\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 810, __extension__ __PRETTY_FUNCTION__)); |
811 | NextInContextAndBits.setInt(MOK); |
812 | } |
813 | |
814 | unsigned getIdentifierNamespace() const { |
815 | return IdentifierNamespace; |
816 | } |
817 | |
818 | bool isInIdentifierNamespace(unsigned NS) const { |
819 | return getIdentifierNamespace() & NS; |
820 | } |
821 | |
822 | static unsigned getIdentifierNamespaceForKind(Kind DK); |
823 | |
824 | bool hasTagIdentifierNamespace() const { |
825 | return isTagIdentifierNamespace(getIdentifierNamespace()); |
826 | } |
827 | |
828 | static bool isTagIdentifierNamespace(unsigned NS) { |
829 | // TagDecls have Tag and Type set and may also have TagFriend. |
830 | return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type); |
831 | } |
832 | |
833 | /// getLexicalDeclContext - The declaration context where this Decl was |
834 | /// lexically declared (LexicalDC). May be different from |
835 | /// getDeclContext() (SemanticDC). |
836 | /// e.g.: |
837 | /// |
838 | /// namespace A { |
839 | /// void f(); // SemanticDC == LexicalDC == 'namespace A' |
840 | /// } |
841 | /// void A::f(); // SemanticDC == namespace 'A' |
842 | /// // LexicalDC == global namespace |
843 | DeclContext *getLexicalDeclContext() { |
844 | if (isInSemaDC()) |
845 | return getSemanticDC(); |
846 | return getMultipleDC()->LexicalDC; |
847 | } |
848 | const DeclContext *getLexicalDeclContext() const { |
849 | return const_cast<Decl*>(this)->getLexicalDeclContext(); |
850 | } |
851 | |
852 | /// Determine whether this declaration is declared out of line (outside its |
853 | /// semantic context). |
854 | virtual bool isOutOfLine() const; |
855 | |
856 | /// setDeclContext - Set both the semantic and lexical DeclContext |
857 | /// to DC. |
858 | void setDeclContext(DeclContext *DC); |
859 | |
860 | void setLexicalDeclContext(DeclContext *DC); |
861 | |
862 | /// Determine whether this declaration is a templated entity (whether it is |
863 | // within the scope of a template parameter). |
864 | bool isTemplated() const; |
865 | |
866 | /// Determine the number of levels of template parameter surrounding this |
867 | /// declaration. |
868 | unsigned getTemplateDepth() const; |
869 | |
870 | /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this |
871 | /// scoped decl is defined outside the current function or method. This is |
872 | /// roughly global variables and functions, but also handles enums (which |
873 | /// could be defined inside or outside a function etc). |
874 | bool isDefinedOutsideFunctionOrMethod() const { |
875 | return getParentFunctionOrMethod() == nullptr; |
876 | } |
877 | |
878 | /// Determine whether a substitution into this declaration would occur as |
879 | /// part of a substitution into a dependent local scope. Such a substitution |
880 | /// transitively substitutes into all constructs nested within this |
881 | /// declaration. |
882 | /// |
883 | /// This recognizes non-defining declarations as well as members of local |
884 | /// classes and lambdas: |
885 | /// \code |
886 | /// template<typename T> void foo() { void bar(); } |
887 | /// template<typename T> void foo2() { class ABC { void bar(); }; } |
888 | /// template<typename T> inline int x = [](){ return 0; }(); |
889 | /// \endcode |
890 | bool isInLocalScopeForInstantiation() const; |
891 | |
892 | /// If this decl is defined inside a function/method/block it returns |
893 | /// the corresponding DeclContext, otherwise it returns null. |
894 | const DeclContext *getParentFunctionOrMethod() const; |
895 | DeclContext *getParentFunctionOrMethod() { |
896 | return const_cast<DeclContext*>( |
897 | const_cast<const Decl*>(this)->getParentFunctionOrMethod()); |
898 | } |
899 | |
900 | /// Retrieves the "canonical" declaration of the given declaration. |
901 | virtual Decl *getCanonicalDecl() { return this; } |
902 | const Decl *getCanonicalDecl() const { |
903 | return const_cast<Decl*>(this)->getCanonicalDecl(); |
904 | } |
905 | |
906 | /// Whether this particular Decl is a canonical one. |
907 | bool isCanonicalDecl() const { return getCanonicalDecl() == this; } |
908 | |
909 | protected: |
910 | /// Returns the next redeclaration or itself if this is the only decl. |
911 | /// |
912 | /// Decl subclasses that can be redeclared should override this method so that |
913 | /// Decl::redecl_iterator can iterate over them. |
914 | virtual Decl *getNextRedeclarationImpl() { return this; } |
915 | |
916 | /// Implementation of getPreviousDecl(), to be overridden by any |
917 | /// subclass that has a redeclaration chain. |
918 | virtual Decl *getPreviousDeclImpl() { return nullptr; } |
919 | |
920 | /// Implementation of getMostRecentDecl(), to be overridden by any |
921 | /// subclass that has a redeclaration chain. |
922 | virtual Decl *getMostRecentDeclImpl() { return this; } |
923 | |
924 | public: |
925 | /// Iterates through all the redeclarations of the same decl. |
926 | class redecl_iterator { |
927 | /// Current - The current declaration. |
928 | Decl *Current = nullptr; |
929 | Decl *Starter; |
930 | |
931 | public: |
932 | using value_type = Decl *; |
933 | using reference = const value_type &; |
934 | using pointer = const value_type *; |
935 | using iterator_category = std::forward_iterator_tag; |
936 | using difference_type = std::ptrdiff_t; |
937 | |
938 | redecl_iterator() = default; |
939 | explicit redecl_iterator(Decl *C) : Current(C), Starter(C) {} |
940 | |
941 | reference operator*() const { return Current; } |
942 | value_type operator->() const { return Current; } |
943 | |
944 | redecl_iterator& operator++() { |
945 | assert(Current && "Advancing while iterator has reached end")(static_cast <bool> (Current && "Advancing while iterator has reached end" ) ? void (0) : __assert_fail ("Current && \"Advancing while iterator has reached end\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 945, __extension__ __PRETTY_FUNCTION__)); |
946 | // Get either previous decl or latest decl. |
947 | Decl *Next = Current->getNextRedeclarationImpl(); |
948 | assert(Next && "Should return next redeclaration or itself, never null!")(static_cast <bool> (Next && "Should return next redeclaration or itself, never null!" ) ? void (0) : __assert_fail ("Next && \"Should return next redeclaration or itself, never null!\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 948, __extension__ __PRETTY_FUNCTION__)); |
949 | Current = (Next != Starter) ? Next : nullptr; |
950 | return *this; |
951 | } |
952 | |
953 | redecl_iterator operator++(int) { |
954 | redecl_iterator tmp(*this); |
955 | ++(*this); |
956 | return tmp; |
957 | } |
958 | |
959 | friend bool operator==(redecl_iterator x, redecl_iterator y) { |
960 | return x.Current == y.Current; |
961 | } |
962 | |
963 | friend bool operator!=(redecl_iterator x, redecl_iterator y) { |
964 | return x.Current != y.Current; |
965 | } |
966 | }; |
967 | |
968 | using redecl_range = llvm::iterator_range<redecl_iterator>; |
969 | |
970 | /// Returns an iterator range for all the redeclarations of the same |
971 | /// decl. It will iterate at least once (when this decl is the only one). |
972 | redecl_range redecls() const { |
973 | return redecl_range(redecls_begin(), redecls_end()); |
974 | } |
975 | |
976 | redecl_iterator redecls_begin() const { |
977 | return redecl_iterator(const_cast<Decl *>(this)); |
978 | } |
979 | |
980 | redecl_iterator redecls_end() const { return redecl_iterator(); } |
981 | |
982 | /// Retrieve the previous declaration that declares the same entity |
983 | /// as this declaration, or NULL if there is no previous declaration. |
984 | Decl *getPreviousDecl() { return getPreviousDeclImpl(); } |
985 | |
986 | /// Retrieve the previous declaration that declares the same entity |
987 | /// as this declaration, or NULL if there is no previous declaration. |
988 | const Decl *getPreviousDecl() const { |
989 | return const_cast<Decl *>(this)->getPreviousDeclImpl(); |
990 | } |
991 | |
992 | /// True if this is the first declaration in its redeclaration chain. |
993 | bool isFirstDecl() const { |
994 | return getPreviousDecl() == nullptr; |
995 | } |
996 | |
997 | /// Retrieve the most recent declaration that declares the same entity |
998 | /// as this declaration (which may be this declaration). |
999 | Decl *getMostRecentDecl() { return getMostRecentDeclImpl(); } |
1000 | |
1001 | /// Retrieve the most recent declaration that declares the same entity |
1002 | /// as this declaration (which may be this declaration). |
1003 | const Decl *getMostRecentDecl() const { |
1004 | return const_cast<Decl *>(this)->getMostRecentDeclImpl(); |
1005 | } |
1006 | |
1007 | /// getBody - If this Decl represents a declaration for a body of code, |
1008 | /// such as a function or method definition, this method returns the |
1009 | /// top-level Stmt* of that body. Otherwise this method returns null. |
1010 | virtual Stmt* getBody() const { return nullptr; } |
1011 | |
1012 | /// Returns true if this \c Decl represents a declaration for a body of |
1013 | /// code, such as a function or method definition. |
1014 | /// Note that \c hasBody can also return true if any redeclaration of this |
1015 | /// \c Decl represents a declaration for a body of code. |
1016 | virtual bool hasBody() const { return getBody() != nullptr; } |
1017 | |
1018 | /// getBodyRBrace - Gets the right brace of the body, if a body exists. |
1019 | /// This works whether the body is a CompoundStmt or a CXXTryStmt. |
1020 | SourceLocation getBodyRBrace() const; |
1021 | |
1022 | // global temp stats (until we have a per-module visitor) |
1023 | static void add(Kind k); |
1024 | static void EnableStatistics(); |
1025 | static void PrintStats(); |
1026 | |
1027 | /// isTemplateParameter - Determines whether this declaration is a |
1028 | /// template parameter. |
1029 | bool isTemplateParameter() const; |
1030 | |
1031 | /// isTemplateParameter - Determines whether this declaration is a |
1032 | /// template parameter pack. |
1033 | bool isTemplateParameterPack() const; |
1034 | |
1035 | /// Whether this declaration is a parameter pack. |
1036 | bool isParameterPack() const; |
1037 | |
1038 | /// returns true if this declaration is a template |
1039 | bool isTemplateDecl() const; |
1040 | |
1041 | /// Whether this declaration is a function or function template. |
1042 | bool isFunctionOrFunctionTemplate() const { |
1043 | return (DeclKind >= Decl::firstFunction && |
1044 | DeclKind <= Decl::lastFunction) || |
1045 | DeclKind == FunctionTemplate; |
1046 | } |
1047 | |
1048 | /// If this is a declaration that describes some template, this |
1049 | /// method returns that template declaration. |
1050 | /// |
1051 | /// Note that this returns nullptr for partial specializations, because they |
1052 | /// are not modeled as TemplateDecls. Use getDescribedTemplateParams to handle |
1053 | /// those cases. |
1054 | TemplateDecl *getDescribedTemplate() const; |
1055 | |
1056 | /// If this is a declaration that describes some template or partial |
1057 | /// specialization, this returns the corresponding template parameter list. |
1058 | const TemplateParameterList *getDescribedTemplateParams() const; |
1059 | |
1060 | /// Returns the function itself, or the templated function if this is a |
1061 | /// function template. |
1062 | FunctionDecl *getAsFunction() LLVM_READONLY__attribute__((__pure__)); |
1063 | |
1064 | const FunctionDecl *getAsFunction() const { |
1065 | return const_cast<Decl *>(this)->getAsFunction(); |
1066 | } |
1067 | |
1068 | /// Changes the namespace of this declaration to reflect that it's |
1069 | /// a function-local extern declaration. |
1070 | /// |
1071 | /// These declarations appear in the lexical context of the extern |
1072 | /// declaration, but in the semantic context of the enclosing namespace |
1073 | /// scope. |
1074 | void setLocalExternDecl() { |
1075 | Decl *Prev = getPreviousDecl(); |
1076 | IdentifierNamespace &= ~IDNS_Ordinary; |
1077 | |
1078 | // It's OK for the declaration to still have the "invisible friend" flag or |
1079 | // the "conflicts with tag declarations in this scope" flag for the outer |
1080 | // scope. |
1081 | assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&(static_cast <bool> ((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 && "namespace is not ordinary") ? void (0) : __assert_fail ("(IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 && \"namespace is not ordinary\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1082, __extension__ __PRETTY_FUNCTION__)) |
1082 | "namespace is not ordinary")(static_cast <bool> ((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 && "namespace is not ordinary") ? void (0) : __assert_fail ("(IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 && \"namespace is not ordinary\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1082, __extension__ __PRETTY_FUNCTION__)); |
1083 | |
1084 | IdentifierNamespace |= IDNS_LocalExtern; |
1085 | if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary) |
1086 | IdentifierNamespace |= IDNS_Ordinary; |
1087 | } |
1088 | |
1089 | /// Determine whether this is a block-scope declaration with linkage. |
1090 | /// This will either be a local variable declaration declared 'extern', or a |
1091 | /// local function declaration. |
1092 | bool isLocalExternDecl() { |
1093 | return IdentifierNamespace & IDNS_LocalExtern; |
1094 | } |
1095 | |
1096 | /// Changes the namespace of this declaration to reflect that it's |
1097 | /// the object of a friend declaration. |
1098 | /// |
1099 | /// These declarations appear in the lexical context of the friending |
1100 | /// class, but in the semantic context of the actual entity. This property |
1101 | /// applies only to a specific decl object; other redeclarations of the |
1102 | /// same entity may not (and probably don't) share this property. |
1103 | void setObjectOfFriendDecl(bool PerformFriendInjection = false) { |
1104 | unsigned OldNS = IdentifierNamespace; |
1105 | assert((OldNS & (IDNS_Tag | IDNS_Ordinary |(static_cast <bool> ((OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator )) && "namespace includes neither ordinary nor tag") ? void (0) : __assert_fail ("(OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes neither ordinary nor tag\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1108, __extension__ __PRETTY_FUNCTION__)) |
1106 | IDNS_TagFriend | IDNS_OrdinaryFriend |(static_cast <bool> ((OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator )) && "namespace includes neither ordinary nor tag") ? void (0) : __assert_fail ("(OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes neither ordinary nor tag\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1108, __extension__ __PRETTY_FUNCTION__)) |
1107 | IDNS_LocalExtern | IDNS_NonMemberOperator)) &&(static_cast <bool> ((OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator )) && "namespace includes neither ordinary nor tag") ? void (0) : __assert_fail ("(OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes neither ordinary nor tag\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1108, __extension__ __PRETTY_FUNCTION__)) |
1108 | "namespace includes neither ordinary nor tag")(static_cast <bool> ((OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator )) && "namespace includes neither ordinary nor tag") ? void (0) : __assert_fail ("(OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes neither ordinary nor tag\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1108, __extension__ __PRETTY_FUNCTION__)); |
1109 | assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |(static_cast <bool> (!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && "namespace includes other than ordinary or tag" ) ? void (0) : __assert_fail ("!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes other than ordinary or tag\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1112, __extension__ __PRETTY_FUNCTION__)) |
1110 | IDNS_TagFriend | IDNS_OrdinaryFriend |(static_cast <bool> (!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && "namespace includes other than ordinary or tag" ) ? void (0) : __assert_fail ("!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes other than ordinary or tag\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1112, __extension__ __PRETTY_FUNCTION__)) |
1111 | IDNS_LocalExtern | IDNS_NonMemberOperator)) &&(static_cast <bool> (!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && "namespace includes other than ordinary or tag" ) ? void (0) : __assert_fail ("!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes other than ordinary or tag\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1112, __extension__ __PRETTY_FUNCTION__)) |
1112 | "namespace includes other than ordinary or tag")(static_cast <bool> (!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && "namespace includes other than ordinary or tag" ) ? void (0) : __assert_fail ("!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes other than ordinary or tag\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1112, __extension__ __PRETTY_FUNCTION__)); |
1113 | |
1114 | Decl *Prev = getPreviousDecl(); |
1115 | IdentifierNamespace &= ~(IDNS_Ordinary | IDNS_Tag | IDNS_Type); |
1116 | |
1117 | if (OldNS & (IDNS_Tag | IDNS_TagFriend)) { |
1118 | IdentifierNamespace |= IDNS_TagFriend; |
1119 | if (PerformFriendInjection || |
1120 | (Prev && Prev->getIdentifierNamespace() & IDNS_Tag)) |
1121 | IdentifierNamespace |= IDNS_Tag | IDNS_Type; |
1122 | } |
1123 | |
1124 | if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend | |
1125 | IDNS_LocalExtern | IDNS_NonMemberOperator)) { |
1126 | IdentifierNamespace |= IDNS_OrdinaryFriend; |
1127 | if (PerformFriendInjection || |
1128 | (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)) |
1129 | IdentifierNamespace |= IDNS_Ordinary; |
1130 | } |
1131 | } |
1132 | |
1133 | enum FriendObjectKind { |
1134 | FOK_None, ///< Not a friend object. |
1135 | FOK_Declared, ///< A friend of a previously-declared entity. |
1136 | FOK_Undeclared ///< A friend of a previously-undeclared entity. |
1137 | }; |
1138 | |
1139 | /// Determines whether this declaration is the object of a |
1140 | /// friend declaration and, if so, what kind. |
1141 | /// |
1142 | /// There is currently no direct way to find the associated FriendDecl. |
1143 | FriendObjectKind getFriendObjectKind() const { |
1144 | unsigned mask = |
1145 | (IdentifierNamespace & (IDNS_TagFriend | IDNS_OrdinaryFriend)); |
1146 | if (!mask) return FOK_None; |
1147 | return (IdentifierNamespace & (IDNS_Tag | IDNS_Ordinary) ? FOK_Declared |
1148 | : FOK_Undeclared); |
1149 | } |
1150 | |
1151 | /// Specifies that this declaration is a C++ overloaded non-member. |
1152 | void setNonMemberOperator() { |
1153 | assert(getKind() == Function || getKind() == FunctionTemplate)(static_cast <bool> (getKind() == Function || getKind() == FunctionTemplate) ? void (0) : __assert_fail ("getKind() == Function || getKind() == FunctionTemplate" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1153, __extension__ __PRETTY_FUNCTION__)); |
1154 | assert((IdentifierNamespace & IDNS_Ordinary) &&(static_cast <bool> ((IdentifierNamespace & IDNS_Ordinary ) && "visible non-member operators should be in ordinary namespace" ) ? void (0) : __assert_fail ("(IdentifierNamespace & IDNS_Ordinary) && \"visible non-member operators should be in ordinary namespace\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1155, __extension__ __PRETTY_FUNCTION__)) |
1155 | "visible non-member operators should be in ordinary namespace")(static_cast <bool> ((IdentifierNamespace & IDNS_Ordinary ) && "visible non-member operators should be in ordinary namespace" ) ? void (0) : __assert_fail ("(IdentifierNamespace & IDNS_Ordinary) && \"visible non-member operators should be in ordinary namespace\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1155, __extension__ __PRETTY_FUNCTION__)); |
1156 | IdentifierNamespace |= IDNS_NonMemberOperator; |
1157 | } |
1158 | |
1159 | static bool classofKind(Kind K) { return true; } |
1160 | static DeclContext *castToDeclContext(const Decl *); |
1161 | static Decl *castFromDeclContext(const DeclContext *); |
1162 | |
1163 | void print(raw_ostream &Out, unsigned Indentation = 0, |
1164 | bool PrintInstantiation = false) const; |
1165 | void print(raw_ostream &Out, const PrintingPolicy &Policy, |
1166 | unsigned Indentation = 0, bool PrintInstantiation = false) const; |
1167 | static void printGroup(Decl** Begin, unsigned NumDecls, |
1168 | raw_ostream &Out, const PrintingPolicy &Policy, |
1169 | unsigned Indentation = 0); |
1170 | |
1171 | // Debuggers don't usually respect default arguments. |
1172 | void dump() const; |
1173 | |
1174 | // Same as dump(), but forces color printing. |
1175 | void dumpColor() const; |
1176 | |
1177 | void dump(raw_ostream &Out, bool Deserialize = false, |
1178 | ASTDumpOutputFormat OutputFormat = ADOF_Default) const; |
1179 | |
1180 | /// \return Unique reproducible object identifier |
1181 | int64_t getID() const; |
1182 | |
1183 | /// Looks through the Decl's underlying type to extract a FunctionType |
1184 | /// when possible. Will return null if the type underlying the Decl does not |
1185 | /// have a FunctionType. |
1186 | const FunctionType *getFunctionType(bool BlocksToo = true) const; |
1187 | |
1188 | private: |
1189 | void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx); |
1190 | void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC, |
1191 | ASTContext &Ctx); |
1192 | |
1193 | protected: |
1194 | ASTMutationListener *getASTMutationListener() const; |
1195 | }; |
1196 | |
1197 | /// Determine whether two declarations declare the same entity. |
1198 | inline bool declaresSameEntity(const Decl *D1, const Decl *D2) { |
1199 | if (!D1 || !D2) |
1200 | return false; |
1201 | |
1202 | if (D1 == D2) |
1203 | return true; |
1204 | |
1205 | return D1->getCanonicalDecl() == D2->getCanonicalDecl(); |
1206 | } |
1207 | |
1208 | /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when |
1209 | /// doing something to a specific decl. |
1210 | class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry { |
1211 | const Decl *TheDecl; |
1212 | SourceLocation Loc; |
1213 | SourceManager &SM; |
1214 | const char *Message; |
1215 | |
1216 | public: |
1217 | PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, |
1218 | SourceManager &sm, const char *Msg) |
1219 | : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {} |
1220 | |
1221 | void print(raw_ostream &OS) const override; |
1222 | }; |
1223 | } // namespace clang |
1224 | |
1225 | // Required to determine the layout of the PointerUnion<NamedDecl*> before |
1226 | // seeing the NamedDecl definition being first used in DeclListNode::operator*. |
1227 | namespace llvm { |
1228 | template <> struct PointerLikeTypeTraits<::clang::NamedDecl *> { |
1229 | static inline void *getAsVoidPointer(::clang::NamedDecl *P) { return P; } |
1230 | static inline ::clang::NamedDecl *getFromVoidPointer(void *P) { |
1231 | return static_cast<::clang::NamedDecl *>(P); |
1232 | } |
1233 | static constexpr int NumLowBitsAvailable = 3; |
1234 | }; |
1235 | } |
1236 | |
1237 | namespace clang { |
1238 | /// A list storing NamedDecls in the lookup tables. |
1239 | class DeclListNode { |
1240 | friend class ASTContext; // allocate, deallocate nodes. |
1241 | friend class StoredDeclsList; |
1242 | public: |
1243 | using Decls = llvm::PointerUnion<NamedDecl*, DeclListNode*>; |
1244 | class iterator { |
1245 | friend class DeclContextLookupResult; |
1246 | friend class StoredDeclsList; |
1247 | |
1248 | Decls Ptr; |
1249 | iterator(Decls Node) : Ptr(Node) { } |
1250 | public: |
1251 | using difference_type = ptrdiff_t; |
1252 | using value_type = NamedDecl*; |
1253 | using pointer = void; |
1254 | using reference = value_type; |
1255 | using iterator_category = std::forward_iterator_tag; |
1256 | |
1257 | iterator() = default; |
1258 | |
1259 | reference operator*() const { |
1260 | assert(Ptr && "dereferencing end() iterator")(static_cast <bool> (Ptr && "dereferencing end() iterator" ) ? void (0) : __assert_fail ("Ptr && \"dereferencing end() iterator\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1260, __extension__ __PRETTY_FUNCTION__)); |
1261 | if (DeclListNode *CurNode = Ptr.dyn_cast<DeclListNode*>()) |
1262 | return CurNode->D; |
1263 | return Ptr.get<NamedDecl*>(); |
1264 | } |
1265 | void operator->() const { } // Unsupported. |
1266 | bool operator==(const iterator &X) const { return Ptr == X.Ptr; } |
1267 | bool operator!=(const iterator &X) const { return Ptr != X.Ptr; } |
1268 | inline iterator &operator++() { // ++It |
1269 | assert(!Ptr.isNull() && "Advancing empty iterator")(static_cast <bool> (!Ptr.isNull() && "Advancing empty iterator" ) ? void (0) : __assert_fail ("!Ptr.isNull() && \"Advancing empty iterator\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 1269, __extension__ __PRETTY_FUNCTION__)); |
1270 | |
1271 | if (DeclListNode *CurNode = Ptr.dyn_cast<DeclListNode*>()) |
1272 | Ptr = CurNode->Rest; |
1273 | else |
1274 | Ptr = nullptr; |
1275 | return *this; |
1276 | } |
1277 | iterator operator++(int) { // It++ |
1278 | iterator temp = *this; |
1279 | ++(*this); |
1280 | return temp; |
1281 | } |
1282 | // Enables the pattern for (iterator I =..., E = I.end(); I != E; ++I) |
1283 | iterator end() { return iterator(); } |
1284 | }; |
1285 | private: |
1286 | NamedDecl *D = nullptr; |
1287 | Decls Rest = nullptr; |
1288 | DeclListNode(NamedDecl *ND) : D(ND) {} |
1289 | }; |
1290 | |
1291 | /// The results of name lookup within a DeclContext. |
1292 | class DeclContextLookupResult { |
1293 | using Decls = DeclListNode::Decls; |
1294 | |
1295 | /// When in collection form, this is what the Data pointer points to. |
1296 | Decls Result; |
1297 | |
1298 | public: |
1299 | DeclContextLookupResult() = default; |
1300 | DeclContextLookupResult(Decls Result) : Result(Result) {} |
1301 | |
1302 | using iterator = DeclListNode::iterator; |
1303 | using const_iterator = iterator; |
1304 | using reference = iterator::reference; |
1305 | |
1306 | iterator begin() { return iterator(Result); } |
1307 | iterator end() { return iterator(); } |
1308 | const_iterator begin() const { |
1309 | return const_cast<DeclContextLookupResult*>(this)->begin(); |
1310 | } |
1311 | const_iterator end() const { return iterator(); } |
1312 | |
1313 | bool empty() const { return Result.isNull(); } |
1314 | bool isSingleResult() const { return Result.dyn_cast<NamedDecl*>(); } |
1315 | reference front() const { return *begin(); } |
1316 | |
1317 | // Find the first declaration of the given type in the list. Note that this |
1318 | // is not in general the earliest-declared declaration, and should only be |
1319 | // used when it's not possible for there to be more than one match or where |
1320 | // it doesn't matter which one is found. |
1321 | template<class T> T *find_first() const { |
1322 | for (auto *D : *this) |
1323 | if (T *Decl = dyn_cast<T>(D)) |
1324 | return Decl; |
1325 | |
1326 | return nullptr; |
1327 | } |
1328 | }; |
1329 | |
1330 | /// DeclContext - This is used only as base class of specific decl types that |
1331 | /// can act as declaration contexts. These decls are (only the top classes |
1332 | /// that directly derive from DeclContext are mentioned, not their subclasses): |
1333 | /// |
1334 | /// TranslationUnitDecl |
1335 | /// ExternCContext |
1336 | /// NamespaceDecl |
1337 | /// TagDecl |
1338 | /// OMPDeclareReductionDecl |
1339 | /// OMPDeclareMapperDecl |
1340 | /// FunctionDecl |
1341 | /// ObjCMethodDecl |
1342 | /// ObjCContainerDecl |
1343 | /// LinkageSpecDecl |
1344 | /// ExportDecl |
1345 | /// BlockDecl |
1346 | /// CapturedDecl |
1347 | class DeclContext { |
1348 | /// For makeDeclVisibleInContextImpl |
1349 | friend class ASTDeclReader; |
1350 | /// For reconcileExternalVisibleStorage, CreateStoredDeclsMap, |
1351 | /// hasNeedToReconcileExternalVisibleStorage |
1352 | friend class ExternalASTSource; |
1353 | /// For CreateStoredDeclsMap |
1354 | friend class DependentDiagnostic; |
1355 | /// For hasNeedToReconcileExternalVisibleStorage, |
1356 | /// hasLazyLocalLexicalLookups, hasLazyExternalLexicalLookups |
1357 | friend class ASTWriter; |
1358 | |
1359 | // We use uint64_t in the bit-fields below since some bit-fields |
1360 | // cross the unsigned boundary and this breaks the packing. |
1361 | |
1362 | /// Stores the bits used by DeclContext. |
1363 | /// If modified NumDeclContextBit, the ctor of DeclContext and the accessor |
1364 | /// methods in DeclContext should be updated appropriately. |
1365 | class DeclContextBitfields { |
1366 | friend class DeclContext; |
1367 | /// DeclKind - This indicates which class this is. |
1368 | uint64_t DeclKind : 7; |
1369 | |
1370 | /// Whether this declaration context also has some external |
1371 | /// storage that contains additional declarations that are lexically |
1372 | /// part of this context. |
1373 | mutable uint64_t ExternalLexicalStorage : 1; |
1374 | |
1375 | /// Whether this declaration context also has some external |
1376 | /// storage that contains additional declarations that are visible |
1377 | /// in this context. |
1378 | mutable uint64_t ExternalVisibleStorage : 1; |
1379 | |
1380 | /// Whether this declaration context has had externally visible |
1381 | /// storage added since the last lookup. In this case, \c LookupPtr's |
1382 | /// invariant may not hold and needs to be fixed before we perform |
1383 | /// another lookup. |
1384 | mutable uint64_t NeedToReconcileExternalVisibleStorage : 1; |
1385 | |
1386 | /// If \c true, this context may have local lexical declarations |
1387 | /// that are missing from the lookup table. |
1388 | mutable uint64_t HasLazyLocalLexicalLookups : 1; |
1389 | |
1390 | /// If \c true, the external source may have lexical declarations |
1391 | /// that are missing from the lookup table. |
1392 | mutable uint64_t HasLazyExternalLexicalLookups : 1; |
1393 | |
1394 | /// If \c true, lookups should only return identifier from |
1395 | /// DeclContext scope (for example TranslationUnit). Used in |
1396 | /// LookupQualifiedName() |
1397 | mutable uint64_t UseQualifiedLookup : 1; |
1398 | }; |
1399 | |
1400 | /// Number of bits in DeclContextBitfields. |
1401 | enum { NumDeclContextBits = 13 }; |
1402 | |
1403 | /// Stores the bits used by TagDecl. |
1404 | /// If modified NumTagDeclBits and the accessor |
1405 | /// methods in TagDecl should be updated appropriately. |
1406 | class TagDeclBitfields { |
1407 | friend class TagDecl; |
1408 | /// For the bits in DeclContextBitfields |
1409 | uint64_t : NumDeclContextBits; |
1410 | |
1411 | /// The TagKind enum. |
1412 | uint64_t TagDeclKind : 3; |
1413 | |
1414 | /// True if this is a definition ("struct foo {};"), false if it is a |
1415 | /// declaration ("struct foo;"). It is not considered a definition |
1416 | /// until the definition has been fully processed. |
1417 | uint64_t IsCompleteDefinition : 1; |
1418 | |
1419 | /// True if this is currently being defined. |
1420 | uint64_t IsBeingDefined : 1; |
1421 | |
1422 | /// True if this tag declaration is "embedded" (i.e., defined or declared |
1423 | /// for the very first time) in the syntax of a declarator. |
1424 | uint64_t IsEmbeddedInDeclarator : 1; |
1425 | |
1426 | /// True if this tag is free standing, e.g. "struct foo;". |
1427 | uint64_t IsFreeStanding : 1; |
1428 | |
1429 | /// Indicates whether it is possible for declarations of this kind |
1430 | /// to have an out-of-date definition. |
1431 | /// |
1432 | /// This option is only enabled when modules are enabled. |
1433 | uint64_t MayHaveOutOfDateDef : 1; |
1434 | |
1435 | /// Has the full definition of this type been required by a use somewhere in |
1436 | /// the TU. |
1437 | uint64_t IsCompleteDefinitionRequired : 1; |
1438 | }; |
1439 | |
1440 | /// Number of non-inherited bits in TagDeclBitfields. |
1441 | enum { NumTagDeclBits = 9 }; |
1442 | |
1443 | /// Stores the bits used by EnumDecl. |
1444 | /// If modified NumEnumDeclBit and the accessor |
1445 | /// methods in EnumDecl should be updated appropriately. |
1446 | class EnumDeclBitfields { |
1447 | friend class EnumDecl; |
1448 | /// For the bits in DeclContextBitfields. |
1449 | uint64_t : NumDeclContextBits; |
1450 | /// For the bits in TagDeclBitfields. |
1451 | uint64_t : NumTagDeclBits; |
1452 | |
1453 | /// Width in bits required to store all the non-negative |
1454 | /// enumerators of this enum. |
1455 | uint64_t NumPositiveBits : 8; |
1456 | |
1457 | /// Width in bits required to store all the negative |
1458 | /// enumerators of this enum. |
1459 | uint64_t NumNegativeBits : 8; |
1460 | |
1461 | /// True if this tag declaration is a scoped enumeration. Only |
1462 | /// possible in C++11 mode. |
1463 | uint64_t IsScoped : 1; |
1464 | |
1465 | /// If this tag declaration is a scoped enum, |
1466 | /// then this is true if the scoped enum was declared using the class |
1467 | /// tag, false if it was declared with the struct tag. No meaning is |
1468 | /// associated if this tag declaration is not a scoped enum. |
1469 | uint64_t IsScopedUsingClassTag : 1; |
1470 | |
1471 | /// True if this is an enumeration with fixed underlying type. Only |
1472 | /// possible in C++11, Microsoft extensions, or Objective C mode. |
1473 | uint64_t IsFixed : 1; |
1474 | |
1475 | /// True if a valid hash is stored in ODRHash. |
1476 | uint64_t HasODRHash : 1; |
1477 | }; |
1478 | |
1479 | /// Number of non-inherited bits in EnumDeclBitfields. |
1480 | enum { NumEnumDeclBits = 20 }; |
1481 | |
1482 | /// Stores the bits used by RecordDecl. |
1483 | /// If modified NumRecordDeclBits and the accessor |
1484 | /// methods in RecordDecl should be updated appropriately. |
1485 | class RecordDeclBitfields { |
1486 | friend class RecordDecl; |
1487 | /// For the bits in DeclContextBitfields. |
1488 | uint64_t : NumDeclContextBits; |
1489 | /// For the bits in TagDeclBitfields. |
1490 | uint64_t : NumTagDeclBits; |
1491 | |
1492 | /// This is true if this struct ends with a flexible |
1493 | /// array member (e.g. int X[]) or if this union contains a struct that does. |
1494 | /// If so, this cannot be contained in arrays or other structs as a member. |
1495 | uint64_t HasFlexibleArrayMember : 1; |
1496 | |
1497 | /// Whether this is the type of an anonymous struct or union. |
1498 | uint64_t AnonymousStructOrUnion : 1; |
1499 | |
1500 | /// This is true if this struct has at least one member |
1501 | /// containing an Objective-C object pointer type. |
1502 | uint64_t HasObjectMember : 1; |
1503 | |
1504 | /// This is true if struct has at least one member of |
1505 | /// 'volatile' type. |
1506 | uint64_t HasVolatileMember : 1; |
1507 | |
1508 | /// Whether the field declarations of this record have been loaded |
1509 | /// from external storage. To avoid unnecessary deserialization of |
1510 | /// methods/nested types we allow deserialization of just the fields |
1511 | /// when needed. |
1512 | mutable uint64_t LoadedFieldsFromExternalStorage : 1; |
1513 | |
1514 | /// Basic properties of non-trivial C structs. |
1515 | uint64_t NonTrivialToPrimitiveDefaultInitialize : 1; |
1516 | uint64_t NonTrivialToPrimitiveCopy : 1; |
1517 | uint64_t NonTrivialToPrimitiveDestroy : 1; |
1518 | |
1519 | /// The following bits indicate whether this is or contains a C union that |
1520 | /// is non-trivial to default-initialize, destruct, or copy. These bits |
1521 | /// imply the associated basic non-triviality predicates declared above. |
1522 | uint64_t HasNonTrivialToPrimitiveDefaultInitializeCUnion : 1; |
1523 | uint64_t HasNonTrivialToPrimitiveDestructCUnion : 1; |
1524 | uint64_t HasNonTrivialToPrimitiveCopyCUnion : 1; |
1525 | |
1526 | /// Indicates whether this struct is destroyed in the callee. |
1527 | uint64_t ParamDestroyedInCallee : 1; |
1528 | |
1529 | /// Represents the way this type is passed to a function. |
1530 | uint64_t ArgPassingRestrictions : 2; |
1531 | }; |
1532 | |
1533 | /// Number of non-inherited bits in RecordDeclBitfields. |
1534 | enum { NumRecordDeclBits = 14 }; |
1535 | |
1536 | /// Stores the bits used by OMPDeclareReductionDecl. |
1537 | /// If modified NumOMPDeclareReductionDeclBits and the accessor |
1538 | /// methods in OMPDeclareReductionDecl should be updated appropriately. |
1539 | class OMPDeclareReductionDeclBitfields { |
1540 | friend class OMPDeclareReductionDecl; |
1541 | /// For the bits in DeclContextBitfields |
1542 | uint64_t : NumDeclContextBits; |
1543 | |
1544 | /// Kind of initializer, |
1545 | /// function call or omp_priv<init_expr> initializtion. |
1546 | uint64_t InitializerKind : 2; |
1547 | }; |
1548 | |
1549 | /// Number of non-inherited bits in OMPDeclareReductionDeclBitfields. |
1550 | enum { NumOMPDeclareReductionDeclBits = 2 }; |
1551 | |
1552 | /// Stores the bits used by FunctionDecl. |
1553 | /// If modified NumFunctionDeclBits and the accessor |
1554 | /// methods in FunctionDecl and CXXDeductionGuideDecl |
1555 | /// (for IsCopyDeductionCandidate) should be updated appropriately. |
1556 | class FunctionDeclBitfields { |
1557 | friend class FunctionDecl; |
1558 | /// For IsCopyDeductionCandidate |
1559 | friend class CXXDeductionGuideDecl; |
1560 | /// For the bits in DeclContextBitfields. |
1561 | uint64_t : NumDeclContextBits; |
1562 | |
1563 | uint64_t SClass : 3; |
1564 | uint64_t IsInline : 1; |
1565 | uint64_t IsInlineSpecified : 1; |
1566 | |
1567 | uint64_t IsVirtualAsWritten : 1; |
1568 | uint64_t IsPure : 1; |
1569 | uint64_t HasInheritedPrototype : 1; |
1570 | uint64_t HasWrittenPrototype : 1; |
1571 | uint64_t IsDeleted : 1; |
1572 | /// Used by CXXMethodDecl |
1573 | uint64_t IsTrivial : 1; |
1574 | |
1575 | /// This flag indicates whether this function is trivial for the purpose of |
1576 | /// calls. This is meaningful only when this function is a copy/move |
1577 | /// constructor or a destructor. |
1578 | uint64_t IsTrivialForCall : 1; |
1579 | |
1580 | uint64_t IsDefaulted : 1; |
1581 | uint64_t IsExplicitlyDefaulted : 1; |
1582 | uint64_t HasDefaultedFunctionInfo : 1; |
1583 | uint64_t HasImplicitReturnZero : 1; |
1584 | uint64_t IsLateTemplateParsed : 1; |
1585 | |
1586 | /// Kind of contexpr specifier as defined by ConstexprSpecKind. |
1587 | uint64_t ConstexprKind : 2; |
1588 | uint64_t InstantiationIsPending : 1; |
1589 | |
1590 | /// Indicates if the function uses __try. |
1591 | uint64_t UsesSEHTry : 1; |
1592 | |
1593 | /// Indicates if the function was a definition |
1594 | /// but its body was skipped. |
1595 | uint64_t HasSkippedBody : 1; |
1596 | |
1597 | /// Indicates if the function declaration will |
1598 | /// have a body, once we're done parsing it. |
1599 | uint64_t WillHaveBody : 1; |
1600 | |
1601 | /// Indicates that this function is a multiversioned |
1602 | /// function using attribute 'target'. |
1603 | uint64_t IsMultiVersion : 1; |
1604 | |
1605 | /// [C++17] Only used by CXXDeductionGuideDecl. Indicates that |
1606 | /// the Deduction Guide is the implicitly generated 'copy |
1607 | /// deduction candidate' (is used during overload resolution). |
1608 | uint64_t IsCopyDeductionCandidate : 1; |
1609 | |
1610 | /// Store the ODRHash after first calculation. |
1611 | uint64_t HasODRHash : 1; |
1612 | |
1613 | /// Indicates if the function uses Floating Point Constrained Intrinsics |
1614 | uint64_t UsesFPIntrin : 1; |
1615 | }; |
1616 | |
1617 | /// Number of non-inherited bits in FunctionDeclBitfields. |
1618 | enum { NumFunctionDeclBits = 27 }; |
1619 | |
1620 | /// Stores the bits used by CXXConstructorDecl. If modified |
1621 | /// NumCXXConstructorDeclBits and the accessor |
1622 | /// methods in CXXConstructorDecl should be updated appropriately. |
1623 | class CXXConstructorDeclBitfields { |
1624 | friend class CXXConstructorDecl; |
1625 | /// For the bits in DeclContextBitfields. |
1626 | uint64_t : NumDeclContextBits; |
1627 | /// For the bits in FunctionDeclBitfields. |
1628 | uint64_t : NumFunctionDeclBits; |
1629 | |
1630 | /// 24 bits to fit in the remaining available space. |
1631 | /// Note that this makes CXXConstructorDeclBitfields take |
1632 | /// exactly 64 bits and thus the width of NumCtorInitializers |
1633 | /// will need to be shrunk if some bit is added to NumDeclContextBitfields, |
1634 | /// NumFunctionDeclBitfields or CXXConstructorDeclBitfields. |
1635 | uint64_t NumCtorInitializers : 21; |
1636 | uint64_t IsInheritingConstructor : 1; |
1637 | |
1638 | /// Whether this constructor has a trail-allocated explicit specifier. |
1639 | uint64_t HasTrailingExplicitSpecifier : 1; |
1640 | /// If this constructor does't have a trail-allocated explicit specifier. |
1641 | /// Whether this constructor is explicit specified. |
1642 | uint64_t IsSimpleExplicit : 1; |
1643 | }; |
1644 | |
1645 | /// Number of non-inherited bits in CXXConstructorDeclBitfields. |
1646 | enum { |
1647 | NumCXXConstructorDeclBits = 64 - NumDeclContextBits - NumFunctionDeclBits |
1648 | }; |
1649 | |
1650 | /// Stores the bits used by ObjCMethodDecl. |
1651 | /// If modified NumObjCMethodDeclBits and the accessor |
1652 | /// methods in ObjCMethodDecl should be updated appropriately. |
1653 | class ObjCMethodDeclBitfields { |
1654 | friend class ObjCMethodDecl; |
1655 | |
1656 | /// For the bits in DeclContextBitfields. |
1657 | uint64_t : NumDeclContextBits; |
1658 | |
1659 | /// The conventional meaning of this method; an ObjCMethodFamily. |
1660 | /// This is not serialized; instead, it is computed on demand and |
1661 | /// cached. |
1662 | mutable uint64_t Family : ObjCMethodFamilyBitWidth; |
1663 | |
1664 | /// instance (true) or class (false) method. |
1665 | uint64_t IsInstance : 1; |
1666 | uint64_t IsVariadic : 1; |
1667 | |
1668 | /// True if this method is the getter or setter for an explicit property. |
1669 | uint64_t IsPropertyAccessor : 1; |
1670 | |
1671 | /// True if this method is a synthesized property accessor stub. |
1672 | uint64_t IsSynthesizedAccessorStub : 1; |
1673 | |
1674 | /// Method has a definition. |
1675 | uint64_t IsDefined : 1; |
1676 | |
1677 | /// Method redeclaration in the same interface. |
1678 | uint64_t IsRedeclaration : 1; |
1679 | |
1680 | /// Is redeclared in the same interface. |
1681 | mutable uint64_t HasRedeclaration : 1; |
1682 | |
1683 | /// \@required/\@optional |
1684 | uint64_t DeclImplementation : 2; |
1685 | |
1686 | /// in, inout, etc. |
1687 | uint64_t objcDeclQualifier : 7; |
1688 | |
1689 | /// Indicates whether this method has a related result type. |
1690 | uint64_t RelatedResultType : 1; |
1691 | |
1692 | /// Whether the locations of the selector identifiers are in a |
1693 | /// "standard" position, a enum SelectorLocationsKind. |
1694 | uint64_t SelLocsKind : 2; |
1695 | |
1696 | /// Whether this method overrides any other in the class hierarchy. |
1697 | /// |
1698 | /// A method is said to override any method in the class's |
1699 | /// base classes, its protocols, or its categories' protocols, that has |
1700 | /// the same selector and is of the same kind (class or instance). |
1701 | /// A method in an implementation is not considered as overriding the same |
1702 | /// method in the interface or its categories. |
1703 | uint64_t IsOverriding : 1; |
1704 | |
1705 | /// Indicates if the method was a definition but its body was skipped. |
1706 | uint64_t HasSkippedBody : 1; |
1707 | }; |
1708 | |
1709 | /// Number of non-inherited bits in ObjCMethodDeclBitfields. |
1710 | enum { NumObjCMethodDeclBits = 24 }; |
1711 | |
1712 | /// Stores the bits used by ObjCContainerDecl. |
1713 | /// If modified NumObjCContainerDeclBits and the accessor |
1714 | /// methods in ObjCContainerDecl should be updated appropriately. |
1715 | class ObjCContainerDeclBitfields { |
1716 | friend class ObjCContainerDecl; |
1717 | /// For the bits in DeclContextBitfields |
1718 | uint32_t : NumDeclContextBits; |
1719 | |
1720 | // Not a bitfield but this saves space. |
1721 | // Note that ObjCContainerDeclBitfields is full. |
1722 | SourceLocation AtStart; |
1723 | }; |
1724 | |
1725 | /// Number of non-inherited bits in ObjCContainerDeclBitfields. |
1726 | /// Note that here we rely on the fact that SourceLocation is 32 bits |
1727 | /// wide. We check this with the static_assert in the ctor of DeclContext. |
1728 | enum { NumObjCContainerDeclBits = 64 - NumDeclContextBits }; |
1729 | |
1730 | /// Stores the bits used by LinkageSpecDecl. |
1731 | /// If modified NumLinkageSpecDeclBits and the accessor |
1732 | /// methods in LinkageSpecDecl should be updated appropriately. |
1733 | class LinkageSpecDeclBitfields { |
1734 | friend class LinkageSpecDecl; |
1735 | /// For the bits in DeclContextBitfields. |
1736 | uint64_t : NumDeclContextBits; |
1737 | |
1738 | /// The language for this linkage specification with values |
1739 | /// in the enum LinkageSpecDecl::LanguageIDs. |
1740 | uint64_t Language : 3; |
1741 | |
1742 | /// True if this linkage spec has braces. |
1743 | /// This is needed so that hasBraces() returns the correct result while the |
1744 | /// linkage spec body is being parsed. Once RBraceLoc has been set this is |
1745 | /// not used, so it doesn't need to be serialized. |
1746 | uint64_t HasBraces : 1; |
1747 | }; |
1748 | |
1749 | /// Number of non-inherited bits in LinkageSpecDeclBitfields. |
1750 | enum { NumLinkageSpecDeclBits = 4 }; |
1751 | |
1752 | /// Stores the bits used by BlockDecl. |
1753 | /// If modified NumBlockDeclBits and the accessor |
1754 | /// methods in BlockDecl should be updated appropriately. |
1755 | class BlockDeclBitfields { |
1756 | friend class BlockDecl; |
1757 | /// For the bits in DeclContextBitfields. |
1758 | uint64_t : NumDeclContextBits; |
1759 | |
1760 | uint64_t IsVariadic : 1; |
1761 | uint64_t CapturesCXXThis : 1; |
1762 | uint64_t BlockMissingReturnType : 1; |
1763 | uint64_t IsConversionFromLambda : 1; |
1764 | |
1765 | /// A bit that indicates this block is passed directly to a function as a |
1766 | /// non-escaping parameter. |
1767 | uint64_t DoesNotEscape : 1; |
1768 | |
1769 | /// A bit that indicates whether it's possible to avoid coying this block to |
1770 | /// the heap when it initializes or is assigned to a local variable with |
1771 | /// automatic storage. |
1772 | uint64_t CanAvoidCopyToHeap : 1; |
1773 | }; |
1774 | |
1775 | /// Number of non-inherited bits in BlockDeclBitfields. |
1776 | enum { NumBlockDeclBits = 5 }; |
1777 | |
1778 | /// Pointer to the data structure used to lookup declarations |
1779 | /// within this context (or a DependentStoredDeclsMap if this is a |
1780 | /// dependent context). We maintain the invariant that, if the map |
1781 | /// contains an entry for a DeclarationName (and we haven't lazily |
1782 | /// omitted anything), then it contains all relevant entries for that |
1783 | /// name (modulo the hasExternalDecls() flag). |
1784 | mutable StoredDeclsMap *LookupPtr = nullptr; |
1785 | |
1786 | protected: |
1787 | /// This anonymous union stores the bits belonging to DeclContext and classes |
1788 | /// deriving from it. The goal is to use otherwise wasted |
1789 | /// space in DeclContext to store data belonging to derived classes. |
1790 | /// The space saved is especially significient when pointers are aligned |
1791 | /// to 8 bytes. In this case due to alignment requirements we have a |
1792 | /// little less than 8 bytes free in DeclContext which we can use. |
1793 | /// We check that none of the classes in this union is larger than |
1794 | /// 8 bytes with static_asserts in the ctor of DeclContext. |
1795 | union { |
1796 | DeclContextBitfields DeclContextBits; |
1797 | TagDeclBitfields TagDeclBits; |
1798 | EnumDeclBitfields EnumDeclBits; |
1799 | RecordDeclBitfields RecordDeclBits; |
1800 | OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits; |
1801 | FunctionDeclBitfields FunctionDeclBits; |
1802 | CXXConstructorDeclBitfields CXXConstructorDeclBits; |
1803 | ObjCMethodDeclBitfields ObjCMethodDeclBits; |
1804 | ObjCContainerDeclBitfields ObjCContainerDeclBits; |
1805 | LinkageSpecDeclBitfields LinkageSpecDeclBits; |
1806 | BlockDeclBitfields BlockDeclBits; |
1807 | |
1808 | static_assert(sizeof(DeclContextBitfields) <= 8, |
1809 | "DeclContextBitfields is larger than 8 bytes!"); |
1810 | static_assert(sizeof(TagDeclBitfields) <= 8, |
1811 | "TagDeclBitfields is larger than 8 bytes!"); |
1812 | static_assert(sizeof(EnumDeclBitfields) <= 8, |
1813 | "EnumDeclBitfields is larger than 8 bytes!"); |
1814 | static_assert(sizeof(RecordDeclBitfields) <= 8, |
1815 | "RecordDeclBitfields is larger than 8 bytes!"); |
1816 | static_assert(sizeof(OMPDeclareReductionDeclBitfields) <= 8, |
1817 | "OMPDeclareReductionDeclBitfields is larger than 8 bytes!"); |
1818 | static_assert(sizeof(FunctionDeclBitfields) <= 8, |
1819 | "FunctionDeclBitfields is larger than 8 bytes!"); |
1820 | static_assert(sizeof(CXXConstructorDeclBitfields) <= 8, |
1821 | "CXXConstructorDeclBitfields is larger than 8 bytes!"); |
1822 | static_assert(sizeof(ObjCMethodDeclBitfields) <= 8, |
1823 | "ObjCMethodDeclBitfields is larger than 8 bytes!"); |
1824 | static_assert(sizeof(ObjCContainerDeclBitfields) <= 8, |
1825 | "ObjCContainerDeclBitfields is larger than 8 bytes!"); |
1826 | static_assert(sizeof(LinkageSpecDeclBitfields) <= 8, |
1827 | "LinkageSpecDeclBitfields is larger than 8 bytes!"); |
1828 | static_assert(sizeof(BlockDeclBitfields) <= 8, |
1829 | "BlockDeclBitfields is larger than 8 bytes!"); |
1830 | }; |
1831 | |
1832 | /// FirstDecl - The first declaration stored within this declaration |
1833 | /// context. |
1834 | mutable Decl *FirstDecl = nullptr; |
1835 | |
1836 | /// LastDecl - The last declaration stored within this declaration |
1837 | /// context. FIXME: We could probably cache this value somewhere |
1838 | /// outside of the DeclContext, to reduce the size of DeclContext by |
1839 | /// another pointer. |
1840 | mutable Decl *LastDecl = nullptr; |
1841 | |
1842 | /// Build up a chain of declarations. |
1843 | /// |
1844 | /// \returns the first/last pair of declarations. |
1845 | static std::pair<Decl *, Decl *> |
1846 | BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded); |
1847 | |
1848 | DeclContext(Decl::Kind K); |
1849 | |
1850 | public: |
1851 | ~DeclContext(); |
1852 | |
1853 | Decl::Kind getDeclKind() const { |
1854 | return static_cast<Decl::Kind>(DeclContextBits.DeclKind); |
1855 | } |
1856 | |
1857 | const char *getDeclKindName() const; |
1858 | |
1859 | /// getParent - Returns the containing DeclContext. |
1860 | DeclContext *getParent() { |
1861 | return cast<Decl>(this)->getDeclContext(); |
1862 | } |
1863 | const DeclContext *getParent() const { |
1864 | return const_cast<DeclContext*>(this)->getParent(); |
1865 | } |
1866 | |
1867 | /// getLexicalParent - Returns the containing lexical DeclContext. May be |
1868 | /// different from getParent, e.g.: |
1869 | /// |
1870 | /// namespace A { |
1871 | /// struct S; |
1872 | /// } |
1873 | /// struct A::S {}; // getParent() == namespace 'A' |
1874 | /// // getLexicalParent() == translation unit |
1875 | /// |
1876 | DeclContext *getLexicalParent() { |
1877 | return cast<Decl>(this)->getLexicalDeclContext(); |
1878 | } |
1879 | const DeclContext *getLexicalParent() const { |
1880 | return const_cast<DeclContext*>(this)->getLexicalParent(); |
1881 | } |
1882 | |
1883 | DeclContext *getLookupParent(); |
1884 | |
1885 | const DeclContext *getLookupParent() const { |
1886 | return const_cast<DeclContext*>(this)->getLookupParent(); |
1887 | } |
1888 | |
1889 | ASTContext &getParentASTContext() const { |
1890 | return cast<Decl>(this)->getASTContext(); |
1891 | } |
1892 | |
1893 | bool isClosure() const { return getDeclKind() == Decl::Block; } |
1894 | |
1895 | /// Return this DeclContext if it is a BlockDecl. Otherwise, return the |
1896 | /// innermost enclosing BlockDecl or null if there are no enclosing blocks. |
1897 | const BlockDecl *getInnermostBlockDecl() const; |
1898 | |
1899 | bool isObjCContainer() const { |
1900 | switch (getDeclKind()) { |
1901 | case Decl::ObjCCategory: |
1902 | case Decl::ObjCCategoryImpl: |
1903 | case Decl::ObjCImplementation: |
1904 | case Decl::ObjCInterface: |
1905 | case Decl::ObjCProtocol: |
1906 | return true; |
1907 | default: |
1908 | return false; |
1909 | } |
1910 | } |
1911 | |
1912 | bool isFunctionOrMethod() const { |
1913 | switch (getDeclKind()) { |
1914 | case Decl::Block: |
1915 | case Decl::Captured: |
1916 | case Decl::ObjCMethod: |
1917 | return true; |
1918 | default: |
1919 | return getDeclKind() >= Decl::firstFunction && |
1920 | getDeclKind() <= Decl::lastFunction; |
1921 | } |
1922 | } |
1923 | |
1924 | /// Test whether the context supports looking up names. |
1925 | bool isLookupContext() const { |
1926 | return !isFunctionOrMethod() && getDeclKind() != Decl::LinkageSpec && |
1927 | getDeclKind() != Decl::Export; |
1928 | } |
1929 | |
1930 | bool isFileContext() const { |
1931 | return getDeclKind() == Decl::TranslationUnit || |
1932 | getDeclKind() == Decl::Namespace; |
1933 | } |
1934 | |
1935 | bool isTranslationUnit() const { |
1936 | return getDeclKind() == Decl::TranslationUnit; |
1937 | } |
1938 | |
1939 | bool isRecord() const { |
1940 | return getDeclKind() >= Decl::firstRecord && |
1941 | getDeclKind() <= Decl::lastRecord; |
1942 | } |
1943 | |
1944 | bool isNamespace() const { return getDeclKind() == Decl::Namespace; } |
1945 | |
1946 | bool isStdNamespace() const; |
1947 | |
1948 | bool isInlineNamespace() const; |
1949 | |
1950 | /// Determines whether this context is dependent on a |
1951 | /// template parameter. |
1952 | bool isDependentContext() const; |
1953 | |
1954 | /// isTransparentContext - Determines whether this context is a |
1955 | /// "transparent" context, meaning that the members declared in this |
1956 | /// context are semantically declared in the nearest enclosing |
1957 | /// non-transparent (opaque) context but are lexically declared in |
1958 | /// this context. For example, consider the enumerators of an |
1959 | /// enumeration type: |
1960 | /// @code |
1961 | /// enum E { |
1962 | /// Val1 |
1963 | /// }; |
1964 | /// @endcode |
1965 | /// Here, E is a transparent context, so its enumerator (Val1) will |
1966 | /// appear (semantically) that it is in the same context of E. |
1967 | /// Examples of transparent contexts include: enumerations (except for |
1968 | /// C++0x scoped enums), and C++ linkage specifications. |
1969 | bool isTransparentContext() const; |
1970 | |
1971 | /// Determines whether this context or some of its ancestors is a |
1972 | /// linkage specification context that specifies C linkage. |
1973 | bool isExternCContext() const; |
1974 | |
1975 | /// Retrieve the nearest enclosing C linkage specification context. |
1976 | const LinkageSpecDecl *getExternCContext() const; |
1977 | |
1978 | /// Determines whether this context or some of its ancestors is a |
1979 | /// linkage specification context that specifies C++ linkage. |
1980 | bool isExternCXXContext() const; |
1981 | |
1982 | /// Determine whether this declaration context is equivalent |
1983 | /// to the declaration context DC. |
1984 | bool Equals(const DeclContext *DC) const { |
1985 | return DC && this->getPrimaryContext() == DC->getPrimaryContext(); |
1986 | } |
1987 | |
1988 | /// Determine whether this declaration context encloses the |
1989 | /// declaration context DC. |
1990 | bool Encloses(const DeclContext *DC) const; |
1991 | |
1992 | /// Find the nearest non-closure ancestor of this context, |
1993 | /// i.e. the innermost semantic parent of this context which is not |
1994 | /// a closure. A context may be its own non-closure ancestor. |
1995 | Decl *getNonClosureAncestor(); |
1996 | const Decl *getNonClosureAncestor() const { |
1997 | return const_cast<DeclContext*>(this)->getNonClosureAncestor(); |
1998 | } |
1999 | |
2000 | // Retrieve the nearest context that is not a transparent context. |
2001 | DeclContext *getNonTransparentContext(); |
2002 | const DeclContext *getNonTransparentContext() const { |
2003 | return const_cast<DeclContext *>(this)->getNonTransparentContext(); |
2004 | } |
2005 | |
2006 | /// getPrimaryContext - There may be many different |
2007 | /// declarations of the same entity (including forward declarations |
2008 | /// of classes, multiple definitions of namespaces, etc.), each with |
2009 | /// a different set of declarations. This routine returns the |
2010 | /// "primary" DeclContext structure, which will contain the |
2011 | /// information needed to perform name lookup into this context. |
2012 | DeclContext *getPrimaryContext(); |
2013 | const DeclContext *getPrimaryContext() const { |
2014 | return const_cast<DeclContext*>(this)->getPrimaryContext(); |
2015 | } |
2016 | |
2017 | /// getRedeclContext - Retrieve the context in which an entity conflicts with |
2018 | /// other entities of the same name, or where it is a redeclaration if the |
2019 | /// two entities are compatible. This skips through transparent contexts. |
2020 | DeclContext *getRedeclContext(); |
2021 | const DeclContext *getRedeclContext() const { |
2022 | return const_cast<DeclContext *>(this)->getRedeclContext(); |
2023 | } |
2024 | |
2025 | /// Retrieve the nearest enclosing namespace context. |
2026 | DeclContext *getEnclosingNamespaceContext(); |
2027 | const DeclContext *getEnclosingNamespaceContext() const { |
2028 | return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext(); |
2029 | } |
2030 | |
2031 | /// Retrieve the outermost lexically enclosing record context. |
2032 | RecordDecl *getOuterLexicalRecordContext(); |
2033 | const RecordDecl *getOuterLexicalRecordContext() const { |
2034 | return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext(); |
2035 | } |
2036 | |
2037 | /// Test if this context is part of the enclosing namespace set of |
2038 | /// the context NS, as defined in C++0x [namespace.def]p9. If either context |
2039 | /// isn't a namespace, this is equivalent to Equals(). |
2040 | /// |
2041 | /// The enclosing namespace set of a namespace is the namespace and, if it is |
2042 | /// inline, its enclosing namespace, recursively. |
2043 | bool InEnclosingNamespaceSetOf(const DeclContext *NS) const; |
2044 | |
2045 | /// Collects all of the declaration contexts that are semantically |
2046 | /// connected to this declaration context. |
2047 | /// |
2048 | /// For declaration contexts that have multiple semantically connected but |
2049 | /// syntactically distinct contexts, such as C++ namespaces, this routine |
2050 | /// retrieves the complete set of such declaration contexts in source order. |
2051 | /// For example, given: |
2052 | /// |
2053 | /// \code |
2054 | /// namespace N { |
2055 | /// int x; |
2056 | /// } |
2057 | /// namespace N { |
2058 | /// int y; |
2059 | /// } |
2060 | /// \endcode |
2061 | /// |
2062 | /// The \c Contexts parameter will contain both definitions of N. |
2063 | /// |
2064 | /// \param Contexts Will be cleared and set to the set of declaration |
2065 | /// contexts that are semanticaly connected to this declaration context, |
2066 | /// in source order, including this context (which may be the only result, |
2067 | /// for non-namespace contexts). |
2068 | void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts); |
2069 | |
2070 | /// decl_iterator - Iterates through the declarations stored |
2071 | /// within this context. |
2072 | class decl_iterator { |
2073 | /// Current - The current declaration. |
2074 | Decl *Current = nullptr; |
2075 | |
2076 | public: |
2077 | using value_type = Decl *; |
2078 | using reference = const value_type &; |
2079 | using pointer = const value_type *; |
2080 | using iterator_category = std::forward_iterator_tag; |
2081 | using difference_type = std::ptrdiff_t; |
2082 | |
2083 | decl_iterator() = default; |
2084 | explicit decl_iterator(Decl *C) : Current(C) {} |
2085 | |
2086 | reference operator*() const { return Current; } |
2087 | |
2088 | // This doesn't meet the iterator requirements, but it's convenient |
2089 | value_type operator->() const { return Current; } |
2090 | |
2091 | decl_iterator& operator++() { |
2092 | Current = Current->getNextDeclInContext(); |
2093 | return *this; |
2094 | } |
2095 | |
2096 | decl_iterator operator++(int) { |
2097 | decl_iterator tmp(*this); |
2098 | ++(*this); |
2099 | return tmp; |
2100 | } |
2101 | |
2102 | friend bool operator==(decl_iterator x, decl_iterator y) { |
2103 | return x.Current == y.Current; |
2104 | } |
2105 | |
2106 | friend bool operator!=(decl_iterator x, decl_iterator y) { |
2107 | return x.Current != y.Current; |
2108 | } |
2109 | }; |
2110 | |
2111 | using decl_range = llvm::iterator_range<decl_iterator>; |
2112 | |
2113 | /// decls_begin/decls_end - Iterate over the declarations stored in |
2114 | /// this context. |
2115 | decl_range decls() const { return decl_range(decls_begin(), decls_end()); } |
2116 | decl_iterator decls_begin() const; |
2117 | decl_iterator decls_end() const { return decl_iterator(); } |
2118 | bool decls_empty() const; |
2119 | |
2120 | /// noload_decls_begin/end - Iterate over the declarations stored in this |
2121 | /// context that are currently loaded; don't attempt to retrieve anything |
2122 | /// from an external source. |
2123 | decl_range noload_decls() const { |
2124 | return decl_range(noload_decls_begin(), noload_decls_end()); |
2125 | } |
2126 | decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); } |
2127 | decl_iterator noload_decls_end() const { return decl_iterator(); } |
2128 | |
2129 | /// specific_decl_iterator - Iterates over a subrange of |
2130 | /// declarations stored in a DeclContext, providing only those that |
2131 | /// are of type SpecificDecl (or a class derived from it). This |
2132 | /// iterator is used, for example, to provide iteration over just |
2133 | /// the fields within a RecordDecl (with SpecificDecl = FieldDecl). |
2134 | template<typename SpecificDecl> |
2135 | class specific_decl_iterator { |
2136 | /// Current - The current, underlying declaration iterator, which |
2137 | /// will either be NULL or will point to a declaration of |
2138 | /// type SpecificDecl. |
2139 | DeclContext::decl_iterator Current; |
2140 | |
2141 | /// SkipToNextDecl - Advances the current position up to the next |
2142 | /// declaration of type SpecificDecl that also meets the criteria |
2143 | /// required by Acceptable. |
2144 | void SkipToNextDecl() { |
2145 | while (*Current && !isa<SpecificDecl>(*Current)) |
2146 | ++Current; |
2147 | } |
2148 | |
2149 | public: |
2150 | using value_type = SpecificDecl *; |
2151 | // TODO: Add reference and pointer types (with some appropriate proxy type) |
2152 | // if we ever have a need for them. |
2153 | using reference = void; |
2154 | using pointer = void; |
2155 | using difference_type = |
2156 | std::iterator_traits<DeclContext::decl_iterator>::difference_type; |
2157 | using iterator_category = std::forward_iterator_tag; |
2158 | |
2159 | specific_decl_iterator() = default; |
2160 | |
2161 | /// specific_decl_iterator - Construct a new iterator over a |
2162 | /// subset of the declarations the range [C, |
2163 | /// end-of-declarations). If A is non-NULL, it is a pointer to a |
2164 | /// member function of SpecificDecl that should return true for |
2165 | /// all of the SpecificDecl instances that will be in the subset |
2166 | /// of iterators. For example, if you want Objective-C instance |
2167 | /// methods, SpecificDecl will be ObjCMethodDecl and A will be |
2168 | /// &ObjCMethodDecl::isInstanceMethod. |
2169 | explicit specific_decl_iterator(DeclContext::decl_iterator C) : Current(C) { |
2170 | SkipToNextDecl(); |
2171 | } |
2172 | |
2173 | value_type operator*() const { return cast<SpecificDecl>(*Current); } |
2174 | |
2175 | // This doesn't meet the iterator requirements, but it's convenient |
2176 | value_type operator->() const { return **this; } |
2177 | |
2178 | specific_decl_iterator& operator++() { |
2179 | ++Current; |
2180 | SkipToNextDecl(); |
2181 | return *this; |
2182 | } |
2183 | |
2184 | specific_decl_iterator operator++(int) { |
2185 | specific_decl_iterator tmp(*this); |
2186 | ++(*this); |
2187 | return tmp; |
2188 | } |
2189 | |
2190 | friend bool operator==(const specific_decl_iterator& x, |
2191 | const specific_decl_iterator& y) { |
2192 | return x.Current == y.Current; |
2193 | } |
2194 | |
2195 | friend bool operator!=(const specific_decl_iterator& x, |
2196 | const specific_decl_iterator& y) { |
2197 | return x.Current != y.Current; |
2198 | } |
2199 | }; |
2200 | |
2201 | /// Iterates over a filtered subrange of declarations stored |
2202 | /// in a DeclContext. |
2203 | /// |
2204 | /// This iterator visits only those declarations that are of type |
2205 | /// SpecificDecl (or a class derived from it) and that meet some |
2206 | /// additional run-time criteria. This iterator is used, for |
2207 | /// example, to provide access to the instance methods within an |
2208 | /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and |
2209 | /// Acceptable = ObjCMethodDecl::isInstanceMethod). |
2210 | template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const> |
2211 | class filtered_decl_iterator { |
2212 | /// Current - The current, underlying declaration iterator, which |
2213 | /// will either be NULL or will point to a declaration of |
2214 | /// type SpecificDecl. |
2215 | DeclContext::decl_iterator Current; |
2216 | |
2217 | /// SkipToNextDecl - Advances the current position up to the next |
2218 | /// declaration of type SpecificDecl that also meets the criteria |
2219 | /// required by Acceptable. |
2220 | void SkipToNextDecl() { |
2221 | while (*Current && |
2222 | (!isa<SpecificDecl>(*Current) || |
2223 | (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)()))) |
2224 | ++Current; |
2225 | } |
2226 | |
2227 | public: |
2228 | using value_type = SpecificDecl *; |
2229 | // TODO: Add reference and pointer types (with some appropriate proxy type) |
2230 | // if we ever have a need for them. |
2231 | using reference = void; |
2232 | using pointer = void; |
2233 | using difference_type = |
2234 | std::iterator_traits<DeclContext::decl_iterator>::difference_type; |
2235 | using iterator_category = std::forward_iterator_tag; |
2236 | |
2237 | filtered_decl_iterator() = default; |
2238 | |
2239 | /// filtered_decl_iterator - Construct a new iterator over a |
2240 | /// subset of the declarations the range [C, |
2241 | /// end-of-declarations). If A is non-NULL, it is a pointer to a |
2242 | /// member function of SpecificDecl that should return true for |
2243 | /// all of the SpecificDecl instances that will be in the subset |
2244 | /// of iterators. For example, if you want Objective-C instance |
2245 | /// methods, SpecificDecl will be ObjCMethodDecl and A will be |
2246 | /// &ObjCMethodDecl::isInstanceMethod. |
2247 | explicit filtered_decl_iterator(DeclContext::decl_iterator C) : Current(C) { |
2248 | SkipToNextDecl(); |
2249 | } |
2250 | |
2251 | value_type operator*() const { return cast<SpecificDecl>(*Current); } |
2252 | value_type operator->() const { return cast<SpecificDecl>(*Current); } |
2253 | |
2254 | filtered_decl_iterator& operator++() { |
2255 | ++Current; |
2256 | SkipToNextDecl(); |
2257 | return *this; |
2258 | } |
2259 | |
2260 | filtered_decl_iterator operator++(int) { |
2261 | filtered_decl_iterator tmp(*this); |
2262 | ++(*this); |
2263 | return tmp; |
2264 | } |
2265 | |
2266 | friend bool operator==(const filtered_decl_iterator& x, |
2267 | const filtered_decl_iterator& y) { |
2268 | return x.Current == y.Current; |
2269 | } |
2270 | |
2271 | friend bool operator!=(const filtered_decl_iterator& x, |
2272 | const filtered_decl_iterator& y) { |
2273 | return x.Current != y.Current; |
2274 | } |
2275 | }; |
2276 | |
2277 | /// Add the declaration D into this context. |
2278 | /// |
2279 | /// This routine should be invoked when the declaration D has first |
2280 | /// been declared, to place D into the context where it was |
2281 | /// (lexically) defined. Every declaration must be added to one |
2282 | /// (and only one!) context, where it can be visited via |
2283 | /// [decls_begin(), decls_end()). Once a declaration has been added |
2284 | /// to its lexical context, the corresponding DeclContext owns the |
2285 | /// declaration. |
2286 | /// |
2287 | /// If D is also a NamedDecl, it will be made visible within its |
2288 | /// semantic context via makeDeclVisibleInContext. |
2289 | void addDecl(Decl *D); |
2290 | |
2291 | /// Add the declaration D into this context, but suppress |
2292 | /// searches for external declarations with the same name. |
2293 | /// |
2294 | /// Although analogous in function to addDecl, this removes an |
2295 | /// important check. This is only useful if the Decl is being |
2296 | /// added in response to an external search; in all other cases, |
2297 | /// addDecl() is the right function to use. |
2298 | /// See the ASTImporter for use cases. |
2299 | void addDeclInternal(Decl *D); |
2300 | |
2301 | /// Add the declaration D to this context without modifying |
2302 | /// any lookup tables. |
2303 | /// |
2304 | /// This is useful for some operations in dependent contexts where |
2305 | /// the semantic context might not be dependent; this basically |
2306 | /// only happens with friends. |
2307 | void addHiddenDecl(Decl *D); |
2308 | |
2309 | /// Removes a declaration from this context. |
2310 | void removeDecl(Decl *D); |
2311 | |
2312 | /// Checks whether a declaration is in this context. |
2313 | bool containsDecl(Decl *D) const; |
2314 | |
2315 | /// Checks whether a declaration is in this context. |
2316 | /// This also loads the Decls from the external source before the check. |
2317 | bool containsDeclAndLoad(Decl *D) const; |
2318 | |
2319 | using lookup_result = DeclContextLookupResult; |
2320 | using lookup_iterator = lookup_result::iterator; |
2321 | |
2322 | /// lookup - Find the declarations (if any) with the given Name in |
2323 | /// this context. Returns a range of iterators that contains all of |
2324 | /// the declarations with this name, with object, function, member, |
2325 | /// and enumerator names preceding any tag name. Note that this |
2326 | /// routine will not look into parent contexts. |
2327 | lookup_result lookup(DeclarationName Name) const; |
2328 | |
2329 | /// Find the declarations with the given name that are visible |
2330 | /// within this context; don't attempt to retrieve anything from an |
2331 | /// external source. |
2332 | lookup_result noload_lookup(DeclarationName Name); |
2333 | |
2334 | /// A simplistic name lookup mechanism that performs name lookup |
2335 | /// into this declaration context without consulting the external source. |
2336 | /// |
2337 | /// This function should almost never be used, because it subverts the |
2338 | /// usual relationship between a DeclContext and the external source. |
2339 | /// See the ASTImporter for the (few, but important) use cases. |
2340 | /// |
2341 | /// FIXME: This is very inefficient; replace uses of it with uses of |
2342 | /// noload_lookup. |
2343 | void localUncachedLookup(DeclarationName Name, |
2344 | SmallVectorImpl<NamedDecl *> &Results); |
2345 | |
2346 | /// Makes a declaration visible within this context. |
2347 | /// |
2348 | /// This routine makes the declaration D visible to name lookup |
2349 | /// within this context and, if this is a transparent context, |
2350 | /// within its parent contexts up to the first enclosing |
2351 | /// non-transparent context. Making a declaration visible within a |
2352 | /// context does not transfer ownership of a declaration, and a |
2353 | /// declaration can be visible in many contexts that aren't its |
2354 | /// lexical context. |
2355 | /// |
2356 | /// If D is a redeclaration of an existing declaration that is |
2357 | /// visible from this context, as determined by |
2358 | /// NamedDecl::declarationReplaces, the previous declaration will be |
2359 | /// replaced with D. |
2360 | void makeDeclVisibleInContext(NamedDecl *D); |
2361 | |
2362 | /// all_lookups_iterator - An iterator that provides a view over the results |
2363 | /// of looking up every possible name. |
2364 | class all_lookups_iterator; |
2365 | |
2366 | using lookups_range = llvm::iterator_range<all_lookups_iterator>; |
2367 | |
2368 | lookups_range lookups() const; |
2369 | // Like lookups(), but avoids loading external declarations. |
2370 | // If PreserveInternalState, avoids building lookup data structures too. |
2371 | lookups_range noload_lookups(bool PreserveInternalState) const; |
2372 | |
2373 | /// Iterators over all possible lookups within this context. |
2374 | all_lookups_iterator lookups_begin() const; |
2375 | all_lookups_iterator lookups_end() const; |
2376 | |
2377 | /// Iterators over all possible lookups within this context that are |
2378 | /// currently loaded; don't attempt to retrieve anything from an external |
2379 | /// source. |
2380 | all_lookups_iterator noload_lookups_begin() const; |
2381 | all_lookups_iterator noload_lookups_end() const; |
2382 | |
2383 | struct udir_iterator; |
2384 | |
2385 | using udir_iterator_base = |
2386 | llvm::iterator_adaptor_base<udir_iterator, lookup_iterator, |
2387 | typename lookup_iterator::iterator_category, |
2388 | UsingDirectiveDecl *>; |
2389 | |
2390 | struct udir_iterator : udir_iterator_base { |
2391 | udir_iterator(lookup_iterator I) : udir_iterator_base(I) {} |
2392 | |
2393 | UsingDirectiveDecl *operator*() const; |
2394 | }; |
2395 | |
2396 | using udir_range = llvm::iterator_range<udir_iterator>; |
2397 | |
2398 | udir_range using_directives() const; |
2399 | |
2400 | // These are all defined in DependentDiagnostic.h. |
2401 | class ddiag_iterator; |
2402 | |
2403 | using ddiag_range = llvm::iterator_range<DeclContext::ddiag_iterator>; |
2404 | |
2405 | inline ddiag_range ddiags() const; |
2406 | |
2407 | // Low-level accessors |
2408 | |
2409 | /// Mark that there are external lexical declarations that we need |
2410 | /// to include in our lookup table (and that are not available as external |
2411 | /// visible lookups). These extra lookup results will be found by walking |
2412 | /// the lexical declarations of this context. This should be used only if |
2413 | /// setHasExternalLexicalStorage() has been called on any decl context for |
2414 | /// which this is the primary context. |
2415 | void setMustBuildLookupTable() { |
2416 | assert(this == getPrimaryContext() &&(static_cast <bool> (this == getPrimaryContext() && "should only be called on primary context") ? void (0) : __assert_fail ("this == getPrimaryContext() && \"should only be called on primary context\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 2417, __extension__ __PRETTY_FUNCTION__)) |
2417 | "should only be called on primary context")(static_cast <bool> (this == getPrimaryContext() && "should only be called on primary context") ? void (0) : __assert_fail ("this == getPrimaryContext() && \"should only be called on primary context\"" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/DeclBase.h" , 2417, __extension__ __PRETTY_FUNCTION__)); |
2418 | DeclContextBits.HasLazyExternalLexicalLookups = true; |
2419 | } |
2420 | |
2421 | /// Retrieve the internal representation of the lookup structure. |
2422 | /// This may omit some names if we are lazily building the structure. |
2423 | StoredDeclsMap *getLookupPtr() const { return LookupPtr; } |
2424 | |
2425 | /// Ensure the lookup structure is fully-built and return it. |
2426 | StoredDeclsMap *buildLookup(); |
2427 | |
2428 | /// Whether this DeclContext has external storage containing |
2429 | /// additional declarations that are lexically in this context. |
2430 | bool hasExternalLexicalStorage() const { |
2431 | return DeclContextBits.ExternalLexicalStorage; |
2432 | } |
2433 | |
2434 | /// State whether this DeclContext has external storage for |
2435 | /// declarations lexically in this context. |
2436 | void setHasExternalLexicalStorage(bool ES = true) const { |
2437 | DeclContextBits.ExternalLexicalStorage = ES; |
2438 | } |
2439 | |
2440 | /// Whether this DeclContext has external storage containing |
2441 | /// additional declarations that are visible in this context. |
2442 | bool hasExternalVisibleStorage() const { |
2443 | return DeclContextBits.ExternalVisibleStorage; |
2444 | } |
2445 | |
2446 | /// State whether this DeclContext has external storage for |
2447 | /// declarations visible in this context. |
2448 | void setHasExternalVisibleStorage(bool ES = true) const { |
2449 | DeclContextBits.ExternalVisibleStorage = ES; |
2450 | if (ES && LookupPtr) |
2451 | DeclContextBits.NeedToReconcileExternalVisibleStorage = true; |
2452 | } |
2453 | |
2454 | /// Determine whether the given declaration is stored in the list of |
2455 | /// declarations lexically within this context. |
2456 | bool isDeclInLexicalTraversal(const Decl *D) const { |
2457 | return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl || |
2458 | D == LastDecl); |
2459 | } |
2460 | |
2461 | bool setUseQualifiedLookup(bool use = true) const { |
2462 | bool old_value = DeclContextBits.UseQualifiedLookup; |
2463 | DeclContextBits.UseQualifiedLookup = use; |
2464 | return old_value; |
2465 | } |
2466 | |
2467 | bool shouldUseQualifiedLookup() const { |
2468 | return DeclContextBits.UseQualifiedLookup; |
2469 | } |
2470 | |
2471 | static bool classof(const Decl *D); |
2472 | static bool classof(const DeclContext *D) { return true; } |
2473 | |
2474 | void dumpDeclContext() const; |
2475 | void dumpLookups() const; |
2476 | void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false, |
2477 | bool Deserialize = false) const; |
2478 | |
2479 | private: |
2480 | /// Whether this declaration context has had externally visible |
2481 | /// storage added since the last lookup. In this case, \c LookupPtr's |
2482 | /// invariant may not hold and needs to be fixed before we perform |
2483 | /// another lookup. |
2484 | bool hasNeedToReconcileExternalVisibleStorage() const { |
2485 | return DeclContextBits.NeedToReconcileExternalVisibleStorage; |
2486 | } |
2487 | |
2488 | /// State that this declaration context has had externally visible |
2489 | /// storage added since the last lookup. In this case, \c LookupPtr's |
2490 | /// invariant may not hold and needs to be fixed before we perform |
2491 | /// another lookup. |
2492 | void setNeedToReconcileExternalVisibleStorage(bool Need = true) const { |
2493 | DeclContextBits.NeedToReconcileExternalVisibleStorage = Need; |
2494 | } |
2495 | |
2496 | /// If \c true, this context may have local lexical declarations |
2497 | /// that are missing from the lookup table. |
2498 | bool hasLazyLocalLexicalLookups() const { |
2499 | return DeclContextBits.HasLazyLocalLexicalLookups; |
2500 | } |
2501 | |
2502 | /// If \c true, this context may have local lexical declarations |
2503 | /// that are missing from the lookup table. |
2504 | void setHasLazyLocalLexicalLookups(bool HasLLLL = true) const { |
2505 | DeclContextBits.HasLazyLocalLexicalLookups = HasLLLL; |
2506 | } |
2507 | |
2508 | /// If \c true, the external source may have lexical declarations |
2509 | /// that are missing from the lookup table. |
2510 | bool hasLazyExternalLexicalLookups() const { |
2511 | return DeclContextBits.HasLazyExternalLexicalLookups; |
2512 | } |
2513 | |
2514 | /// If \c true, the external source may have lexical declarations |
2515 | /// that are missing from the lookup table. |
2516 | void setHasLazyExternalLexicalLookups(bool HasLELL = true) const { |
2517 | DeclContextBits.HasLazyExternalLexicalLookups = HasLELL; |
2518 | } |
2519 | |
2520 | void reconcileExternalVisibleStorage() const; |
2521 | bool LoadLexicalDeclsFromExternalStorage() const; |
2522 | |
2523 | /// Makes a declaration visible within this context, but |
2524 | /// suppresses searches for external declarations with the same |
2525 | /// name. |
2526 | /// |
2527 | /// Analogous to makeDeclVisibleInContext, but for the exclusive |
2528 | /// use of addDeclInternal(). |
2529 | void makeDeclVisibleInContextInternal(NamedDecl *D); |
2530 | |
2531 | StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const; |
2532 | |
2533 | void loadLazyLocalLexicalLookups(); |
2534 | void buildLookupImpl(DeclContext *DCtx, bool Internal); |
2535 | void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal, |
2536 | bool Rediscoverable); |
2537 | void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal); |
2538 | }; |
2539 | |
2540 | inline bool Decl::isTemplateParameter() const { |
2541 | return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm || |
2542 | getKind() == TemplateTemplateParm; |
2543 | } |
2544 | |
2545 | // Specialization selected when ToTy is not a known subclass of DeclContext. |
2546 | template <class ToTy, |
2547 | bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value> |
2548 | struct cast_convert_decl_context { |
2549 | static const ToTy *doit(const DeclContext *Val) { |
2550 | return static_cast<const ToTy*>(Decl::castFromDeclContext(Val)); |
2551 | } |
2552 | |
2553 | static ToTy *doit(DeclContext *Val) { |
2554 | return static_cast<ToTy*>(Decl::castFromDeclContext(Val)); |
2555 | } |
2556 | }; |
2557 | |
2558 | // Specialization selected when ToTy is a known subclass of DeclContext. |
2559 | template <class ToTy> |
2560 | struct cast_convert_decl_context<ToTy, true> { |
2561 | static const ToTy *doit(const DeclContext *Val) { |
2562 | return static_cast<const ToTy*>(Val); |
2563 | } |
2564 | |
2565 | static ToTy *doit(DeclContext *Val) { |
2566 | return static_cast<ToTy*>(Val); |
2567 | } |
2568 | }; |
2569 | |
2570 | } // namespace clang |
2571 | |
2572 | namespace llvm { |
2573 | |
2574 | /// isa<T>(DeclContext*) |
2575 | template <typename To> |
2576 | struct isa_impl<To, ::clang::DeclContext> { |
2577 | static bool doit(const ::clang::DeclContext &Val) { |
2578 | return To::classofKind(Val.getDeclKind()); |
2579 | } |
2580 | }; |
2581 | |
2582 | /// cast<T>(DeclContext*) |
2583 | template<class ToTy> |
2584 | struct cast_convert_val<ToTy, |
2585 | const ::clang::DeclContext,const ::clang::DeclContext> { |
2586 | static const ToTy &doit(const ::clang::DeclContext &Val) { |
2587 | return *::clang::cast_convert_decl_context<ToTy>::doit(&Val); |
2588 | } |
2589 | }; |
2590 | |
2591 | template<class ToTy> |
2592 | struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> { |
2593 | static ToTy &doit(::clang::DeclContext &Val) { |
2594 | return *::clang::cast_convert_decl_context<ToTy>::doit(&Val); |
2595 | } |
2596 | }; |
2597 | |
2598 | template<class ToTy> |
2599 | struct cast_convert_val<ToTy, |
2600 | const ::clang::DeclContext*, const ::clang::DeclContext*> { |
2601 | static const ToTy *doit(const ::clang::DeclContext *Val) { |
2602 | return ::clang::cast_convert_decl_context<ToTy>::doit(Val); |
2603 | } |
2604 | }; |
2605 | |
2606 | template<class ToTy> |
2607 | struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> { |
2608 | static ToTy *doit(::clang::DeclContext *Val) { |
2609 | return ::clang::cast_convert_decl_context<ToTy>::doit(Val); |
2610 | } |
2611 | }; |
2612 | |
2613 | /// Implement cast_convert_val for Decl -> DeclContext conversions. |
2614 | template<class FromTy> |
2615 | struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> { |
2616 | static ::clang::DeclContext &doit(const FromTy &Val) { |
2617 | return *FromTy::castToDeclContext(&Val); |
2618 | } |
2619 | }; |
2620 | |
2621 | template<class FromTy> |
2622 | struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> { |
2623 | static ::clang::DeclContext *doit(const FromTy *Val) { |
2624 | return FromTy::castToDeclContext(Val); |
2625 | } |
2626 | }; |
2627 | |
2628 | template<class FromTy> |
2629 | struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> { |
2630 | static const ::clang::DeclContext &doit(const FromTy &Val) { |
2631 | return *FromTy::castToDeclContext(&Val); |
2632 | } |
2633 | }; |
2634 | |
2635 | template<class FromTy> |
2636 | struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> { |
2637 | static const ::clang::DeclContext *doit(const FromTy *Val) { |
2638 | return FromTy::castToDeclContext(Val); |
2639 | } |
2640 | }; |
2641 | |
2642 | } // namespace llvm |
2643 | |
2644 | #endif // LLVM_CLANG_AST_DECLBASE_H |
1 | //===- AttrIterator.h - Classes for attribute iteration ---------*- C++ -*-===// | ||||||
2 | // | ||||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||
6 | // | ||||||
7 | //===----------------------------------------------------------------------===// | ||||||
8 | // | ||||||
9 | // This file defines the Attr vector and specific_attr_iterator interfaces. | ||||||
10 | // | ||||||
11 | //===----------------------------------------------------------------------===// | ||||||
12 | |||||||
13 | #ifndef LLVM_CLANG_AST_ATTRITERATOR_H | ||||||
14 | #define LLVM_CLANG_AST_ATTRITERATOR_H | ||||||
15 | |||||||
16 | #include "clang/Basic/LLVM.h" | ||||||
17 | #include "llvm/ADT/SmallVector.h" | ||||||
18 | #include "llvm/Support/Casting.h" | ||||||
19 | #include <cassert> | ||||||
20 | #include <cstddef> | ||||||
21 | #include <iterator> | ||||||
22 | |||||||
23 | namespace clang { | ||||||
24 | |||||||
25 | class ASTContext; | ||||||
26 | class Attr; | ||||||
27 | |||||||
28 | /// AttrVec - A vector of Attr, which is how they are stored on the AST. | ||||||
29 | using AttrVec = SmallVector<Attr *, 4>; | ||||||
30 | |||||||
31 | /// specific_attr_iterator - Iterates over a subrange of an AttrVec, only | ||||||
32 | /// providing attributes that are of a specific type. | ||||||
33 | template <typename SpecificAttr, typename Container = AttrVec> | ||||||
34 | class specific_attr_iterator { | ||||||
35 | using Iterator = typename Container::const_iterator; | ||||||
36 | |||||||
37 | /// Current - The current, underlying iterator. | ||||||
38 | /// In order to ensure we don't dereference an invalid iterator unless | ||||||
39 | /// specifically requested, we don't necessarily advance this all the | ||||||
40 | /// way. Instead, we advance it when an operation is requested; if the | ||||||
41 | /// operation is acting on what should be a past-the-end iterator, | ||||||
42 | /// then we offer no guarantees, but this way we do not dereference a | ||||||
43 | /// past-the-end iterator when we move to a past-the-end position. | ||||||
44 | mutable Iterator Current; | ||||||
45 | |||||||
46 | void AdvanceToNext() const { | ||||||
47 | while (!isa<SpecificAttr>(*Current)) | ||||||
48 | ++Current; | ||||||
49 | } | ||||||
50 | |||||||
51 | void AdvanceToNext(Iterator I) const { | ||||||
52 | while (Current != I && !isa<SpecificAttr>(*Current)) | ||||||
53 | ++Current; | ||||||
54 | } | ||||||
55 | |||||||
56 | public: | ||||||
57 | using value_type = SpecificAttr *; | ||||||
58 | using reference = SpecificAttr *; | ||||||
59 | using pointer = SpecificAttr *; | ||||||
60 | using iterator_category = std::forward_iterator_tag; | ||||||
61 | using difference_type = std::ptrdiff_t; | ||||||
62 | |||||||
63 | specific_attr_iterator() = default; | ||||||
64 | explicit specific_attr_iterator(Iterator i) : Current(i) {} | ||||||
65 | |||||||
66 | reference operator*() const { | ||||||
67 | AdvanceToNext(); | ||||||
68 | return cast<SpecificAttr>(*Current); | ||||||
69 | } | ||||||
70 | pointer operator->() const { | ||||||
71 | AdvanceToNext(); | ||||||
72 | return cast<SpecificAttr>(*Current); | ||||||
73 | } | ||||||
74 | |||||||
75 | specific_attr_iterator& operator++() { | ||||||
76 | ++Current; | ||||||
77 | return *this; | ||||||
78 | } | ||||||
79 | specific_attr_iterator operator++(int) { | ||||||
80 | specific_attr_iterator Tmp(*this); | ||||||
81 | ++(*this); | ||||||
82 | return Tmp; | ||||||
83 | } | ||||||
84 | |||||||
85 | friend bool operator==(specific_attr_iterator Left, | ||||||
86 | specific_attr_iterator Right) { | ||||||
87 | assert((Left.Current == nullptr) == (Right.Current == nullptr))(static_cast <bool> ((Left.Current == nullptr) == (Right .Current == nullptr)) ? void (0) : __assert_fail ("(Left.Current == nullptr) == (Right.Current == nullptr)" , "/build/llvm-toolchain-snapshot-14~++20211110111138+cffbfd01e37b/clang/include/clang/AST/AttrIterator.h" , 87, __extension__ __PRETTY_FUNCTION__)); | ||||||
88 | if (Left.Current
| ||||||
89 | Left.AdvanceToNext(Right.Current); | ||||||
90 | else | ||||||
91 | Right.AdvanceToNext(Left.Current); | ||||||
92 | return Left.Current == Right.Current; | ||||||
93 | } | ||||||
94 | friend bool operator!=(specific_attr_iterator Left, | ||||||
95 | specific_attr_iterator Right) { | ||||||
96 | return !(Left == Right); | ||||||
97 | } | ||||||
98 | }; | ||||||
99 | |||||||
100 | template <typename SpecificAttr, typename Container> | ||||||
101 | inline specific_attr_iterator<SpecificAttr, Container> | ||||||
102 | specific_attr_begin(const Container& container) { | ||||||
103 | return specific_attr_iterator<SpecificAttr, Container>(container.begin()); | ||||||
104 | } | ||||||
105 | template <typename SpecificAttr, typename Container> | ||||||
106 | inline specific_attr_iterator<SpecificAttr, Container> | ||||||
107 | specific_attr_end(const Container& container) { | ||||||
108 | return specific_attr_iterator<SpecificAttr, Container>(container.end()); | ||||||
109 | } | ||||||
110 | |||||||
111 | template <typename SpecificAttr, typename Container> | ||||||
112 | inline bool hasSpecificAttr(const Container& container) { | ||||||
113 | return specific_attr_begin<SpecificAttr>(container) != | ||||||
114 | specific_attr_end<SpecificAttr>(container); | ||||||
115 | } | ||||||
116 | template <typename SpecificAttr, typename Container> | ||||||
117 | inline SpecificAttr *getSpecificAttr(const Container& container) { | ||||||
118 | specific_attr_iterator<SpecificAttr, Container> i = | ||||||
119 | specific_attr_begin<SpecificAttr>(container); | ||||||
120 | if (i != specific_attr_end<SpecificAttr>(container)) | ||||||
121 | return *i; | ||||||
122 | else | ||||||
123 | return nullptr; | ||||||
124 | } | ||||||
125 | |||||||
126 | } // namespace clang | ||||||
127 | |||||||
128 | #endif // LLVM_CLANG_AST_ATTRITERATOR_H |