File: | tools/clang/lib/AST/Decl.cpp |
Warning: | line 4486, column 3 Null pointer passed as an argument to a 'nonnull' parameter |
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1 | //===- Decl.cpp - Declaration AST Node Implementation ---------------------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This file implements the Decl subclasses. | |||
10 | // | |||
11 | //===----------------------------------------------------------------------===// | |||
12 | ||||
13 | #include "clang/AST/Decl.h" | |||
14 | #include "Linkage.h" | |||
15 | #include "clang/AST/ASTContext.h" | |||
16 | #include "clang/AST/ASTDiagnostic.h" | |||
17 | #include "clang/AST/ASTLambda.h" | |||
18 | #include "clang/AST/ASTMutationListener.h" | |||
19 | #include "clang/AST/CanonicalType.h" | |||
20 | #include "clang/AST/DeclBase.h" | |||
21 | #include "clang/AST/DeclCXX.h" | |||
22 | #include "clang/AST/DeclObjC.h" | |||
23 | #include "clang/AST/DeclOpenMP.h" | |||
24 | #include "clang/AST/DeclTemplate.h" | |||
25 | #include "clang/AST/DeclarationName.h" | |||
26 | #include "clang/AST/Expr.h" | |||
27 | #include "clang/AST/ExprCXX.h" | |||
28 | #include "clang/AST/ExternalASTSource.h" | |||
29 | #include "clang/AST/ODRHash.h" | |||
30 | #include "clang/AST/PrettyDeclStackTrace.h" | |||
31 | #include "clang/AST/PrettyPrinter.h" | |||
32 | #include "clang/AST/Redeclarable.h" | |||
33 | #include "clang/AST/Stmt.h" | |||
34 | #include "clang/AST/TemplateBase.h" | |||
35 | #include "clang/AST/Type.h" | |||
36 | #include "clang/AST/TypeLoc.h" | |||
37 | #include "clang/Basic/Builtins.h" | |||
38 | #include "clang/Basic/IdentifierTable.h" | |||
39 | #include "clang/Basic/LLVM.h" | |||
40 | #include "clang/Basic/LangOptions.h" | |||
41 | #include "clang/Basic/Linkage.h" | |||
42 | #include "clang/Basic/Module.h" | |||
43 | #include "clang/Basic/PartialDiagnostic.h" | |||
44 | #include "clang/Basic/SanitizerBlacklist.h" | |||
45 | #include "clang/Basic/Sanitizers.h" | |||
46 | #include "clang/Basic/SourceLocation.h" | |||
47 | #include "clang/Basic/SourceManager.h" | |||
48 | #include "clang/Basic/Specifiers.h" | |||
49 | #include "clang/Basic/TargetCXXABI.h" | |||
50 | #include "clang/Basic/TargetInfo.h" | |||
51 | #include "clang/Basic/Visibility.h" | |||
52 | #include "llvm/ADT/APSInt.h" | |||
53 | #include "llvm/ADT/ArrayRef.h" | |||
54 | #include "llvm/ADT/None.h" | |||
55 | #include "llvm/ADT/Optional.h" | |||
56 | #include "llvm/ADT/STLExtras.h" | |||
57 | #include "llvm/ADT/SmallVector.h" | |||
58 | #include "llvm/ADT/StringSwitch.h" | |||
59 | #include "llvm/ADT/StringRef.h" | |||
60 | #include "llvm/ADT/Triple.h" | |||
61 | #include "llvm/Support/Casting.h" | |||
62 | #include "llvm/Support/ErrorHandling.h" | |||
63 | #include "llvm/Support/raw_ostream.h" | |||
64 | #include <algorithm> | |||
65 | #include <cassert> | |||
66 | #include <cstddef> | |||
67 | #include <cstring> | |||
68 | #include <memory> | |||
69 | #include <string> | |||
70 | #include <tuple> | |||
71 | #include <type_traits> | |||
72 | ||||
73 | using namespace clang; | |||
74 | ||||
75 | Decl *clang::getPrimaryMergedDecl(Decl *D) { | |||
76 | return D->getASTContext().getPrimaryMergedDecl(D); | |||
77 | } | |||
78 | ||||
79 | void PrettyDeclStackTraceEntry::print(raw_ostream &OS) const { | |||
80 | SourceLocation Loc = this->Loc; | |||
81 | if (!Loc.isValid() && TheDecl) Loc = TheDecl->getLocation(); | |||
82 | if (Loc.isValid()) { | |||
83 | Loc.print(OS, Context.getSourceManager()); | |||
84 | OS << ": "; | |||
85 | } | |||
86 | OS << Message; | |||
87 | ||||
88 | if (auto *ND = dyn_cast_or_null<NamedDecl>(TheDecl)) { | |||
89 | OS << " '"; | |||
90 | ND->getNameForDiagnostic(OS, Context.getPrintingPolicy(), true); | |||
91 | OS << "'"; | |||
92 | } | |||
93 | ||||
94 | OS << '\n'; | |||
95 | } | |||
96 | ||||
97 | // Defined here so that it can be inlined into its direct callers. | |||
98 | bool Decl::isOutOfLine() const { | |||
99 | return !getLexicalDeclContext()->Equals(getDeclContext()); | |||
100 | } | |||
101 | ||||
102 | TranslationUnitDecl::TranslationUnitDecl(ASTContext &ctx) | |||
103 | : Decl(TranslationUnit, nullptr, SourceLocation()), | |||
104 | DeclContext(TranslationUnit), Ctx(ctx) {} | |||
105 | ||||
106 | //===----------------------------------------------------------------------===// | |||
107 | // NamedDecl Implementation | |||
108 | //===----------------------------------------------------------------------===// | |||
109 | ||||
110 | // Visibility rules aren't rigorously externally specified, but here | |||
111 | // are the basic principles behind what we implement: | |||
112 | // | |||
113 | // 1. An explicit visibility attribute is generally a direct expression | |||
114 | // of the user's intent and should be honored. Only the innermost | |||
115 | // visibility attribute applies. If no visibility attribute applies, | |||
116 | // global visibility settings are considered. | |||
117 | // | |||
118 | // 2. There is one caveat to the above: on or in a template pattern, | |||
119 | // an explicit visibility attribute is just a default rule, and | |||
120 | // visibility can be decreased by the visibility of template | |||
121 | // arguments. But this, too, has an exception: an attribute on an | |||
122 | // explicit specialization or instantiation causes all the visibility | |||
123 | // restrictions of the template arguments to be ignored. | |||
124 | // | |||
125 | // 3. A variable that does not otherwise have explicit visibility can | |||
126 | // be restricted by the visibility of its type. | |||
127 | // | |||
128 | // 4. A visibility restriction is explicit if it comes from an | |||
129 | // attribute (or something like it), not a global visibility setting. | |||
130 | // When emitting a reference to an external symbol, visibility | |||
131 | // restrictions are ignored unless they are explicit. | |||
132 | // | |||
133 | // 5. When computing the visibility of a non-type, including a | |||
134 | // non-type member of a class, only non-type visibility restrictions | |||
135 | // are considered: the 'visibility' attribute, global value-visibility | |||
136 | // settings, and a few special cases like __private_extern. | |||
137 | // | |||
138 | // 6. When computing the visibility of a type, including a type member | |||
139 | // of a class, only type visibility restrictions are considered: | |||
140 | // the 'type_visibility' attribute and global type-visibility settings. | |||
141 | // However, a 'visibility' attribute counts as a 'type_visibility' | |||
142 | // attribute on any declaration that only has the former. | |||
143 | // | |||
144 | // The visibility of a "secondary" entity, like a template argument, | |||
145 | // is computed using the kind of that entity, not the kind of the | |||
146 | // primary entity for which we are computing visibility. For example, | |||
147 | // the visibility of a specialization of either of these templates: | |||
148 | // template <class T, bool (&compare)(T, X)> bool has_match(list<T>, X); | |||
149 | // template <class T, bool (&compare)(T, X)> class matcher; | |||
150 | // is restricted according to the type visibility of the argument 'T', | |||
151 | // the type visibility of 'bool(&)(T,X)', and the value visibility of | |||
152 | // the argument function 'compare'. That 'has_match' is a value | |||
153 | // and 'matcher' is a type only matters when looking for attributes | |||
154 | // and settings from the immediate context. | |||
155 | ||||
156 | /// Does this computation kind permit us to consider additional | |||
157 | /// visibility settings from attributes and the like? | |||
158 | static bool hasExplicitVisibilityAlready(LVComputationKind computation) { | |||
159 | return computation.IgnoreExplicitVisibility; | |||
160 | } | |||
161 | ||||
162 | /// Given an LVComputationKind, return one of the same type/value sort | |||
163 | /// that records that it already has explicit visibility. | |||
164 | static LVComputationKind | |||
165 | withExplicitVisibilityAlready(LVComputationKind Kind) { | |||
166 | Kind.IgnoreExplicitVisibility = true; | |||
167 | return Kind; | |||
168 | } | |||
169 | ||||
170 | static Optional<Visibility> getExplicitVisibility(const NamedDecl *D, | |||
171 | LVComputationKind kind) { | |||
172 | assert(!kind.IgnoreExplicitVisibility &&((!kind.IgnoreExplicitVisibility && "asking for explicit visibility when we shouldn't be" ) ? static_cast<void> (0) : __assert_fail ("!kind.IgnoreExplicitVisibility && \"asking for explicit visibility when we shouldn't be\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 173, __PRETTY_FUNCTION__)) | |||
173 | "asking for explicit visibility when we shouldn't be")((!kind.IgnoreExplicitVisibility && "asking for explicit visibility when we shouldn't be" ) ? static_cast<void> (0) : __assert_fail ("!kind.IgnoreExplicitVisibility && \"asking for explicit visibility when we shouldn't be\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 173, __PRETTY_FUNCTION__)); | |||
174 | return D->getExplicitVisibility(kind.getExplicitVisibilityKind()); | |||
175 | } | |||
176 | ||||
177 | /// Is the given declaration a "type" or a "value" for the purposes of | |||
178 | /// visibility computation? | |||
179 | static bool usesTypeVisibility(const NamedDecl *D) { | |||
180 | return isa<TypeDecl>(D) || | |||
181 | isa<ClassTemplateDecl>(D) || | |||
182 | isa<ObjCInterfaceDecl>(D); | |||
183 | } | |||
184 | ||||
185 | /// Does the given declaration have member specialization information, | |||
186 | /// and if so, is it an explicit specialization? | |||
187 | template <class T> static typename | |||
188 | std::enable_if<!std::is_base_of<RedeclarableTemplateDecl, T>::value, bool>::type | |||
189 | isExplicitMemberSpecialization(const T *D) { | |||
190 | if (const MemberSpecializationInfo *member = | |||
191 | D->getMemberSpecializationInfo()) { | |||
192 | return member->isExplicitSpecialization(); | |||
193 | } | |||
194 | return false; | |||
195 | } | |||
196 | ||||
197 | /// For templates, this question is easier: a member template can't be | |||
198 | /// explicitly instantiated, so there's a single bit indicating whether | |||
199 | /// or not this is an explicit member specialization. | |||
200 | static bool isExplicitMemberSpecialization(const RedeclarableTemplateDecl *D) { | |||
201 | return D->isMemberSpecialization(); | |||
202 | } | |||
203 | ||||
204 | /// Given a visibility attribute, return the explicit visibility | |||
205 | /// associated with it. | |||
206 | template <class T> | |||
207 | static Visibility getVisibilityFromAttr(const T *attr) { | |||
208 | switch (attr->getVisibility()) { | |||
209 | case T::Default: | |||
210 | return DefaultVisibility; | |||
211 | case T::Hidden: | |||
212 | return HiddenVisibility; | |||
213 | case T::Protected: | |||
214 | return ProtectedVisibility; | |||
215 | } | |||
216 | llvm_unreachable("bad visibility kind")::llvm::llvm_unreachable_internal("bad visibility kind", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 216); | |||
217 | } | |||
218 | ||||
219 | /// Return the explicit visibility of the given declaration. | |||
220 | static Optional<Visibility> getVisibilityOf(const NamedDecl *D, | |||
221 | NamedDecl::ExplicitVisibilityKind kind) { | |||
222 | // If we're ultimately computing the visibility of a type, look for | |||
223 | // a 'type_visibility' attribute before looking for 'visibility'. | |||
224 | if (kind == NamedDecl::VisibilityForType) { | |||
225 | if (const auto *A = D->getAttr<TypeVisibilityAttr>()) { | |||
226 | return getVisibilityFromAttr(A); | |||
227 | } | |||
228 | } | |||
229 | ||||
230 | // If this declaration has an explicit visibility attribute, use it. | |||
231 | if (const auto *A = D->getAttr<VisibilityAttr>()) { | |||
232 | return getVisibilityFromAttr(A); | |||
233 | } | |||
234 | ||||
235 | return None; | |||
236 | } | |||
237 | ||||
238 | LinkageInfo LinkageComputer::getLVForType(const Type &T, | |||
239 | LVComputationKind computation) { | |||
240 | if (computation.IgnoreAllVisibility) | |||
241 | return LinkageInfo(T.getLinkage(), DefaultVisibility, true); | |||
242 | return getTypeLinkageAndVisibility(&T); | |||
243 | } | |||
244 | ||||
245 | /// Get the most restrictive linkage for the types in the given | |||
246 | /// template parameter list. For visibility purposes, template | |||
247 | /// parameters are part of the signature of a template. | |||
248 | LinkageInfo LinkageComputer::getLVForTemplateParameterList( | |||
249 | const TemplateParameterList *Params, LVComputationKind computation) { | |||
250 | LinkageInfo LV; | |||
251 | for (const NamedDecl *P : *Params) { | |||
252 | // Template type parameters are the most common and never | |||
253 | // contribute to visibility, pack or not. | |||
254 | if (isa<TemplateTypeParmDecl>(P)) | |||
255 | continue; | |||
256 | ||||
257 | // Non-type template parameters can be restricted by the value type, e.g. | |||
258 | // template <enum X> class A { ... }; | |||
259 | // We have to be careful here, though, because we can be dealing with | |||
260 | // dependent types. | |||
261 | if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) { | |||
262 | // Handle the non-pack case first. | |||
263 | if (!NTTP->isExpandedParameterPack()) { | |||
264 | if (!NTTP->getType()->isDependentType()) { | |||
265 | LV.merge(getLVForType(*NTTP->getType(), computation)); | |||
266 | } | |||
267 | continue; | |||
268 | } | |||
269 | ||||
270 | // Look at all the types in an expanded pack. | |||
271 | for (unsigned i = 0, n = NTTP->getNumExpansionTypes(); i != n; ++i) { | |||
272 | QualType type = NTTP->getExpansionType(i); | |||
273 | if (!type->isDependentType()) | |||
274 | LV.merge(getTypeLinkageAndVisibility(type)); | |||
275 | } | |||
276 | continue; | |||
277 | } | |||
278 | ||||
279 | // Template template parameters can be restricted by their | |||
280 | // template parameters, recursively. | |||
281 | const auto *TTP = cast<TemplateTemplateParmDecl>(P); | |||
282 | ||||
283 | // Handle the non-pack case first. | |||
284 | if (!TTP->isExpandedParameterPack()) { | |||
285 | LV.merge(getLVForTemplateParameterList(TTP->getTemplateParameters(), | |||
286 | computation)); | |||
287 | continue; | |||
288 | } | |||
289 | ||||
290 | // Look at all expansions in an expanded pack. | |||
291 | for (unsigned i = 0, n = TTP->getNumExpansionTemplateParameters(); | |||
292 | i != n; ++i) { | |||
293 | LV.merge(getLVForTemplateParameterList( | |||
294 | TTP->getExpansionTemplateParameters(i), computation)); | |||
295 | } | |||
296 | } | |||
297 | ||||
298 | return LV; | |||
299 | } | |||
300 | ||||
301 | static const Decl *getOutermostFuncOrBlockContext(const Decl *D) { | |||
302 | const Decl *Ret = nullptr; | |||
303 | const DeclContext *DC = D->getDeclContext(); | |||
304 | while (DC->getDeclKind() != Decl::TranslationUnit) { | |||
305 | if (isa<FunctionDecl>(DC) || isa<BlockDecl>(DC)) | |||
306 | Ret = cast<Decl>(DC); | |||
307 | DC = DC->getParent(); | |||
308 | } | |||
309 | return Ret; | |||
310 | } | |||
311 | ||||
312 | /// Get the most restrictive linkage for the types and | |||
313 | /// declarations in the given template argument list. | |||
314 | /// | |||
315 | /// Note that we don't take an LVComputationKind because we always | |||
316 | /// want to honor the visibility of template arguments in the same way. | |||
317 | LinkageInfo | |||
318 | LinkageComputer::getLVForTemplateArgumentList(ArrayRef<TemplateArgument> Args, | |||
319 | LVComputationKind computation) { | |||
320 | LinkageInfo LV; | |||
321 | ||||
322 | for (const TemplateArgument &Arg : Args) { | |||
323 | switch (Arg.getKind()) { | |||
324 | case TemplateArgument::Null: | |||
325 | case TemplateArgument::Integral: | |||
326 | case TemplateArgument::Expression: | |||
327 | continue; | |||
328 | ||||
329 | case TemplateArgument::Type: | |||
330 | LV.merge(getLVForType(*Arg.getAsType(), computation)); | |||
331 | continue; | |||
332 | ||||
333 | case TemplateArgument::Declaration: { | |||
334 | const NamedDecl *ND = Arg.getAsDecl(); | |||
335 | assert(!usesTypeVisibility(ND))((!usesTypeVisibility(ND)) ? static_cast<void> (0) : __assert_fail ("!usesTypeVisibility(ND)", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 335, __PRETTY_FUNCTION__)); | |||
336 | LV.merge(getLVForDecl(ND, computation)); | |||
337 | continue; | |||
338 | } | |||
339 | ||||
340 | case TemplateArgument::NullPtr: | |||
341 | LV.merge(getTypeLinkageAndVisibility(Arg.getNullPtrType())); | |||
342 | continue; | |||
343 | ||||
344 | case TemplateArgument::Template: | |||
345 | case TemplateArgument::TemplateExpansion: | |||
346 | if (TemplateDecl *Template = | |||
347 | Arg.getAsTemplateOrTemplatePattern().getAsTemplateDecl()) | |||
348 | LV.merge(getLVForDecl(Template, computation)); | |||
349 | continue; | |||
350 | ||||
351 | case TemplateArgument::Pack: | |||
352 | LV.merge(getLVForTemplateArgumentList(Arg.getPackAsArray(), computation)); | |||
353 | continue; | |||
354 | } | |||
355 | llvm_unreachable("bad template argument kind")::llvm::llvm_unreachable_internal("bad template argument kind" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 355); | |||
356 | } | |||
357 | ||||
358 | return LV; | |||
359 | } | |||
360 | ||||
361 | LinkageInfo | |||
362 | LinkageComputer::getLVForTemplateArgumentList(const TemplateArgumentList &TArgs, | |||
363 | LVComputationKind computation) { | |||
364 | return getLVForTemplateArgumentList(TArgs.asArray(), computation); | |||
365 | } | |||
366 | ||||
367 | static bool shouldConsiderTemplateVisibility(const FunctionDecl *fn, | |||
368 | const FunctionTemplateSpecializationInfo *specInfo) { | |||
369 | // Include visibility from the template parameters and arguments | |||
370 | // only if this is not an explicit instantiation or specialization | |||
371 | // with direct explicit visibility. (Implicit instantiations won't | |||
372 | // have a direct attribute.) | |||
373 | if (!specInfo->isExplicitInstantiationOrSpecialization()) | |||
374 | return true; | |||
375 | ||||
376 | return !fn->hasAttr<VisibilityAttr>(); | |||
377 | } | |||
378 | ||||
379 | /// Merge in template-related linkage and visibility for the given | |||
380 | /// function template specialization. | |||
381 | /// | |||
382 | /// We don't need a computation kind here because we can assume | |||
383 | /// LVForValue. | |||
384 | /// | |||
385 | /// \param[out] LV the computation to use for the parent | |||
386 | void LinkageComputer::mergeTemplateLV( | |||
387 | LinkageInfo &LV, const FunctionDecl *fn, | |||
388 | const FunctionTemplateSpecializationInfo *specInfo, | |||
389 | LVComputationKind computation) { | |||
390 | bool considerVisibility = | |||
391 | shouldConsiderTemplateVisibility(fn, specInfo); | |||
392 | ||||
393 | // Merge information from the template parameters. | |||
394 | FunctionTemplateDecl *temp = specInfo->getTemplate(); | |||
395 | LinkageInfo tempLV = | |||
396 | getLVForTemplateParameterList(temp->getTemplateParameters(), computation); | |||
397 | LV.mergeMaybeWithVisibility(tempLV, considerVisibility); | |||
398 | ||||
399 | // Merge information from the template arguments. | |||
400 | const TemplateArgumentList &templateArgs = *specInfo->TemplateArguments; | |||
401 | LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation); | |||
402 | LV.mergeMaybeWithVisibility(argsLV, considerVisibility); | |||
403 | } | |||
404 | ||||
405 | /// Does the given declaration have a direct visibility attribute | |||
406 | /// that would match the given rules? | |||
407 | static bool hasDirectVisibilityAttribute(const NamedDecl *D, | |||
408 | LVComputationKind computation) { | |||
409 | if (computation.IgnoreAllVisibility) | |||
410 | return false; | |||
411 | ||||
412 | return (computation.isTypeVisibility() && D->hasAttr<TypeVisibilityAttr>()) || | |||
413 | D->hasAttr<VisibilityAttr>(); | |||
414 | } | |||
415 | ||||
416 | /// Should we consider visibility associated with the template | |||
417 | /// arguments and parameters of the given class template specialization? | |||
418 | static bool shouldConsiderTemplateVisibility( | |||
419 | const ClassTemplateSpecializationDecl *spec, | |||
420 | LVComputationKind computation) { | |||
421 | // Include visibility from the template parameters and arguments | |||
422 | // only if this is not an explicit instantiation or specialization | |||
423 | // with direct explicit visibility (and note that implicit | |||
424 | // instantiations won't have a direct attribute). | |||
425 | // | |||
426 | // Furthermore, we want to ignore template parameters and arguments | |||
427 | // for an explicit specialization when computing the visibility of a | |||
428 | // member thereof with explicit visibility. | |||
429 | // | |||
430 | // This is a bit complex; let's unpack it. | |||
431 | // | |||
432 | // An explicit class specialization is an independent, top-level | |||
433 | // declaration. As such, if it or any of its members has an | |||
434 | // explicit visibility attribute, that must directly express the | |||
435 | // user's intent, and we should honor it. The same logic applies to | |||
436 | // an explicit instantiation of a member of such a thing. | |||
437 | ||||
438 | // Fast path: if this is not an explicit instantiation or | |||
439 | // specialization, we always want to consider template-related | |||
440 | // visibility restrictions. | |||
441 | if (!spec->isExplicitInstantiationOrSpecialization()) | |||
442 | return true; | |||
443 | ||||
444 | // This is the 'member thereof' check. | |||
445 | if (spec->isExplicitSpecialization() && | |||
446 | hasExplicitVisibilityAlready(computation)) | |||
447 | return false; | |||
448 | ||||
449 | return !hasDirectVisibilityAttribute(spec, computation); | |||
450 | } | |||
451 | ||||
452 | /// Merge in template-related linkage and visibility for the given | |||
453 | /// class template specialization. | |||
454 | void LinkageComputer::mergeTemplateLV( | |||
455 | LinkageInfo &LV, const ClassTemplateSpecializationDecl *spec, | |||
456 | LVComputationKind computation) { | |||
457 | bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation); | |||
458 | ||||
459 | // Merge information from the template parameters, but ignore | |||
460 | // visibility if we're only considering template arguments. | |||
461 | ||||
462 | ClassTemplateDecl *temp = spec->getSpecializedTemplate(); | |||
463 | LinkageInfo tempLV = | |||
464 | getLVForTemplateParameterList(temp->getTemplateParameters(), computation); | |||
465 | LV.mergeMaybeWithVisibility(tempLV, | |||
466 | considerVisibility && !hasExplicitVisibilityAlready(computation)); | |||
467 | ||||
468 | // Merge information from the template arguments. We ignore | |||
469 | // template-argument visibility if we've got an explicit | |||
470 | // instantiation with a visibility attribute. | |||
471 | const TemplateArgumentList &templateArgs = spec->getTemplateArgs(); | |||
472 | LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation); | |||
473 | if (considerVisibility) | |||
474 | LV.mergeVisibility(argsLV); | |||
475 | LV.mergeExternalVisibility(argsLV); | |||
476 | } | |||
477 | ||||
478 | /// Should we consider visibility associated with the template | |||
479 | /// arguments and parameters of the given variable template | |||
480 | /// specialization? As usual, follow class template specialization | |||
481 | /// logic up to initialization. | |||
482 | static bool shouldConsiderTemplateVisibility( | |||
483 | const VarTemplateSpecializationDecl *spec, | |||
484 | LVComputationKind computation) { | |||
485 | // Include visibility from the template parameters and arguments | |||
486 | // only if this is not an explicit instantiation or specialization | |||
487 | // with direct explicit visibility (and note that implicit | |||
488 | // instantiations won't have a direct attribute). | |||
489 | if (!spec->isExplicitInstantiationOrSpecialization()) | |||
490 | return true; | |||
491 | ||||
492 | // An explicit variable specialization is an independent, top-level | |||
493 | // declaration. As such, if it has an explicit visibility attribute, | |||
494 | // that must directly express the user's intent, and we should honor | |||
495 | // it. | |||
496 | if (spec->isExplicitSpecialization() && | |||
497 | hasExplicitVisibilityAlready(computation)) | |||
498 | return false; | |||
499 | ||||
500 | return !hasDirectVisibilityAttribute(spec, computation); | |||
501 | } | |||
502 | ||||
503 | /// Merge in template-related linkage and visibility for the given | |||
504 | /// variable template specialization. As usual, follow class template | |||
505 | /// specialization logic up to initialization. | |||
506 | void LinkageComputer::mergeTemplateLV(LinkageInfo &LV, | |||
507 | const VarTemplateSpecializationDecl *spec, | |||
508 | LVComputationKind computation) { | |||
509 | bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation); | |||
510 | ||||
511 | // Merge information from the template parameters, but ignore | |||
512 | // visibility if we're only considering template arguments. | |||
513 | ||||
514 | VarTemplateDecl *temp = spec->getSpecializedTemplate(); | |||
515 | LinkageInfo tempLV = | |||
516 | getLVForTemplateParameterList(temp->getTemplateParameters(), computation); | |||
517 | LV.mergeMaybeWithVisibility(tempLV, | |||
518 | considerVisibility && !hasExplicitVisibilityAlready(computation)); | |||
519 | ||||
520 | // Merge information from the template arguments. We ignore | |||
521 | // template-argument visibility if we've got an explicit | |||
522 | // instantiation with a visibility attribute. | |||
523 | const TemplateArgumentList &templateArgs = spec->getTemplateArgs(); | |||
524 | LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation); | |||
525 | if (considerVisibility) | |||
526 | LV.mergeVisibility(argsLV); | |||
527 | LV.mergeExternalVisibility(argsLV); | |||
528 | } | |||
529 | ||||
530 | static bool useInlineVisibilityHidden(const NamedDecl *D) { | |||
531 | // FIXME: we should warn if -fvisibility-inlines-hidden is used with c. | |||
532 | const LangOptions &Opts = D->getASTContext().getLangOpts(); | |||
533 | if (!Opts.CPlusPlus || !Opts.InlineVisibilityHidden) | |||
534 | return false; | |||
535 | ||||
536 | const auto *FD = dyn_cast<FunctionDecl>(D); | |||
537 | if (!FD) | |||
538 | return false; | |||
539 | ||||
540 | TemplateSpecializationKind TSK = TSK_Undeclared; | |||
541 | if (FunctionTemplateSpecializationInfo *spec | |||
542 | = FD->getTemplateSpecializationInfo()) { | |||
543 | TSK = spec->getTemplateSpecializationKind(); | |||
544 | } else if (MemberSpecializationInfo *MSI = | |||
545 | FD->getMemberSpecializationInfo()) { | |||
546 | TSK = MSI->getTemplateSpecializationKind(); | |||
547 | } | |||
548 | ||||
549 | const FunctionDecl *Def = nullptr; | |||
550 | // InlineVisibilityHidden only applies to definitions, and | |||
551 | // isInlined() only gives meaningful answers on definitions | |||
552 | // anyway. | |||
553 | return TSK != TSK_ExplicitInstantiationDeclaration && | |||
554 | TSK != TSK_ExplicitInstantiationDefinition && | |||
555 | FD->hasBody(Def) && Def->isInlined() && !Def->hasAttr<GNUInlineAttr>(); | |||
556 | } | |||
557 | ||||
558 | template <typename T> static bool isFirstInExternCContext(T *D) { | |||
559 | const T *First = D->getFirstDecl(); | |||
560 | return First->isInExternCContext(); | |||
561 | } | |||
562 | ||||
563 | static bool isSingleLineLanguageLinkage(const Decl &D) { | |||
564 | if (const auto *SD = dyn_cast<LinkageSpecDecl>(D.getDeclContext())) | |||
565 | if (!SD->hasBraces()) | |||
566 | return true; | |||
567 | return false; | |||
568 | } | |||
569 | ||||
570 | /// Determine whether D is declared in the purview of a named module. | |||
571 | static bool isInModulePurview(const NamedDecl *D) { | |||
572 | if (auto *M = D->getOwningModule()) | |||
573 | return M->isModulePurview(); | |||
574 | return false; | |||
575 | } | |||
576 | ||||
577 | static bool isExportedFromModuleInterfaceUnit(const NamedDecl *D) { | |||
578 | // FIXME: Handle isModulePrivate. | |||
579 | switch (D->getModuleOwnershipKind()) { | |||
580 | case Decl::ModuleOwnershipKind::Unowned: | |||
581 | case Decl::ModuleOwnershipKind::ModulePrivate: | |||
582 | return false; | |||
583 | case Decl::ModuleOwnershipKind::Visible: | |||
584 | case Decl::ModuleOwnershipKind::VisibleWhenImported: | |||
585 | return isInModulePurview(D); | |||
586 | } | |||
587 | llvm_unreachable("unexpected module ownership kind")::llvm::llvm_unreachable_internal("unexpected module ownership kind" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 587); | |||
588 | } | |||
589 | ||||
590 | static LinkageInfo getInternalLinkageFor(const NamedDecl *D) { | |||
591 | // Internal linkage declarations within a module interface unit are modeled | |||
592 | // as "module-internal linkage", which means that they have internal linkage | |||
593 | // formally but can be indirectly accessed from outside the module via inline | |||
594 | // functions and templates defined within the module. | |||
595 | if (isInModulePurview(D)) | |||
596 | return LinkageInfo(ModuleInternalLinkage, DefaultVisibility, false); | |||
597 | ||||
598 | return LinkageInfo::internal(); | |||
599 | } | |||
600 | ||||
601 | static LinkageInfo getExternalLinkageFor(const NamedDecl *D) { | |||
602 | // C++ Modules TS [basic.link]/6.8: | |||
603 | // - A name declared at namespace scope that does not have internal linkage | |||
604 | // by the previous rules and that is introduced by a non-exported | |||
605 | // declaration has module linkage. | |||
606 | if (isInModulePurview(D) && !isExportedFromModuleInterfaceUnit( | |||
607 | cast<NamedDecl>(D->getCanonicalDecl()))) | |||
608 | return LinkageInfo(ModuleLinkage, DefaultVisibility, false); | |||
609 | ||||
610 | return LinkageInfo::external(); | |||
611 | } | |||
612 | ||||
613 | static StorageClass getStorageClass(const Decl *D) { | |||
614 | if (auto *TD = dyn_cast<TemplateDecl>(D)) | |||
615 | D = TD->getTemplatedDecl(); | |||
616 | if (D) { | |||
617 | if (auto *VD = dyn_cast<VarDecl>(D)) | |||
618 | return VD->getStorageClass(); | |||
619 | if (auto *FD = dyn_cast<FunctionDecl>(D)) | |||
620 | return FD->getStorageClass(); | |||
621 | } | |||
622 | return SC_None; | |||
623 | } | |||
624 | ||||
625 | LinkageInfo | |||
626 | LinkageComputer::getLVForNamespaceScopeDecl(const NamedDecl *D, | |||
627 | LVComputationKind computation, | |||
628 | bool IgnoreVarTypeLinkage) { | |||
629 | assert(D->getDeclContext()->getRedeclContext()->isFileContext() &&((D->getDeclContext()->getRedeclContext()->isFileContext () && "Not a name having namespace scope") ? static_cast <void> (0) : __assert_fail ("D->getDeclContext()->getRedeclContext()->isFileContext() && \"Not a name having namespace scope\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 630, __PRETTY_FUNCTION__)) | |||
630 | "Not a name having namespace scope")((D->getDeclContext()->getRedeclContext()->isFileContext () && "Not a name having namespace scope") ? static_cast <void> (0) : __assert_fail ("D->getDeclContext()->getRedeclContext()->isFileContext() && \"Not a name having namespace scope\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 630, __PRETTY_FUNCTION__)); | |||
631 | ASTContext &Context = D->getASTContext(); | |||
632 | ||||
633 | // C++ [basic.link]p3: | |||
634 | // A name having namespace scope (3.3.6) has internal linkage if it | |||
635 | // is the name of | |||
636 | ||||
637 | if (getStorageClass(D->getCanonicalDecl()) == SC_Static) { | |||
638 | // - a variable, variable template, function, or function template | |||
639 | // that is explicitly declared static; or | |||
640 | // (This bullet corresponds to C99 6.2.2p3.) | |||
641 | return getInternalLinkageFor(D); | |||
642 | } | |||
643 | ||||
644 | if (const auto *Var = dyn_cast<VarDecl>(D)) { | |||
645 | // - a non-template variable of non-volatile const-qualified type, unless | |||
646 | // - it is explicitly declared extern, or | |||
647 | // - it is inline or exported, or | |||
648 | // - it was previously declared and the prior declaration did not have | |||
649 | // internal linkage | |||
650 | // (There is no equivalent in C99.) | |||
651 | if (Context.getLangOpts().CPlusPlus && | |||
652 | Var->getType().isConstQualified() && | |||
653 | !Var->getType().isVolatileQualified() && | |||
654 | !Var->isInline() && | |||
655 | !isExportedFromModuleInterfaceUnit(Var) && | |||
656 | !isa<VarTemplateSpecializationDecl>(Var) && | |||
657 | !Var->getDescribedVarTemplate()) { | |||
658 | const VarDecl *PrevVar = Var->getPreviousDecl(); | |||
659 | if (PrevVar) | |||
660 | return getLVForDecl(PrevVar, computation); | |||
661 | ||||
662 | if (Var->getStorageClass() != SC_Extern && | |||
663 | Var->getStorageClass() != SC_PrivateExtern && | |||
664 | !isSingleLineLanguageLinkage(*Var)) | |||
665 | return getInternalLinkageFor(Var); | |||
666 | } | |||
667 | ||||
668 | for (const VarDecl *PrevVar = Var->getPreviousDecl(); PrevVar; | |||
669 | PrevVar = PrevVar->getPreviousDecl()) { | |||
670 | if (PrevVar->getStorageClass() == SC_PrivateExtern && | |||
671 | Var->getStorageClass() == SC_None) | |||
672 | return getDeclLinkageAndVisibility(PrevVar); | |||
673 | // Explicitly declared static. | |||
674 | if (PrevVar->getStorageClass() == SC_Static) | |||
675 | return getInternalLinkageFor(Var); | |||
676 | } | |||
677 | } else if (const auto *IFD = dyn_cast<IndirectFieldDecl>(D)) { | |||
678 | // - a data member of an anonymous union. | |||
679 | const VarDecl *VD = IFD->getVarDecl(); | |||
680 | assert(VD && "Expected a VarDecl in this IndirectFieldDecl!")((VD && "Expected a VarDecl in this IndirectFieldDecl!" ) ? static_cast<void> (0) : __assert_fail ("VD && \"Expected a VarDecl in this IndirectFieldDecl!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 680, __PRETTY_FUNCTION__)); | |||
681 | return getLVForNamespaceScopeDecl(VD, computation, IgnoreVarTypeLinkage); | |||
682 | } | |||
683 | assert(!isa<FieldDecl>(D) && "Didn't expect a FieldDecl!")((!isa<FieldDecl>(D) && "Didn't expect a FieldDecl!" ) ? static_cast<void> (0) : __assert_fail ("!isa<FieldDecl>(D) && \"Didn't expect a FieldDecl!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 683, __PRETTY_FUNCTION__)); | |||
684 | ||||
685 | // FIXME: This gives internal linkage to names that should have no linkage | |||
686 | // (those not covered by [basic.link]p6). | |||
687 | if (D->isInAnonymousNamespace()) { | |||
688 | const auto *Var = dyn_cast<VarDecl>(D); | |||
689 | const auto *Func = dyn_cast<FunctionDecl>(D); | |||
690 | // FIXME: The check for extern "C" here is not justified by the standard | |||
691 | // wording, but we retain it from the pre-DR1113 model to avoid breaking | |||
692 | // code. | |||
693 | // | |||
694 | // C++11 [basic.link]p4: | |||
695 | // An unnamed namespace or a namespace declared directly or indirectly | |||
696 | // within an unnamed namespace has internal linkage. | |||
697 | if ((!Var || !isFirstInExternCContext(Var)) && | |||
698 | (!Func || !isFirstInExternCContext(Func))) | |||
699 | return getInternalLinkageFor(D); | |||
700 | } | |||
701 | ||||
702 | // Set up the defaults. | |||
703 | ||||
704 | // C99 6.2.2p5: | |||
705 | // If the declaration of an identifier for an object has file | |||
706 | // scope and no storage-class specifier, its linkage is | |||
707 | // external. | |||
708 | LinkageInfo LV = getExternalLinkageFor(D); | |||
709 | ||||
710 | if (!hasExplicitVisibilityAlready(computation)) { | |||
711 | if (Optional<Visibility> Vis = getExplicitVisibility(D, computation)) { | |||
712 | LV.mergeVisibility(*Vis, true); | |||
713 | } else { | |||
714 | // If we're declared in a namespace with a visibility attribute, | |||
715 | // use that namespace's visibility, and it still counts as explicit. | |||
716 | for (const DeclContext *DC = D->getDeclContext(); | |||
717 | !isa<TranslationUnitDecl>(DC); | |||
718 | DC = DC->getParent()) { | |||
719 | const auto *ND = dyn_cast<NamespaceDecl>(DC); | |||
720 | if (!ND) continue; | |||
721 | if (Optional<Visibility> Vis = getExplicitVisibility(ND, computation)) { | |||
722 | LV.mergeVisibility(*Vis, true); | |||
723 | break; | |||
724 | } | |||
725 | } | |||
726 | } | |||
727 | ||||
728 | // Add in global settings if the above didn't give us direct visibility. | |||
729 | if (!LV.isVisibilityExplicit()) { | |||
730 | // Use global type/value visibility as appropriate. | |||
731 | Visibility globalVisibility = | |||
732 | computation.isValueVisibility() | |||
733 | ? Context.getLangOpts().getValueVisibilityMode() | |||
734 | : Context.getLangOpts().getTypeVisibilityMode(); | |||
735 | LV.mergeVisibility(globalVisibility, /*explicit*/ false); | |||
736 | ||||
737 | // If we're paying attention to global visibility, apply | |||
738 | // -finline-visibility-hidden if this is an inline method. | |||
739 | if (useInlineVisibilityHidden(D)) | |||
740 | LV.mergeVisibility(HiddenVisibility, /*visibilityExplicit=*/false); | |||
741 | } | |||
742 | } | |||
743 | ||||
744 | // C++ [basic.link]p4: | |||
745 | ||||
746 | // A name having namespace scope that has not been given internal linkage | |||
747 | // above and that is the name of | |||
748 | // [...bullets...] | |||
749 | // has its linkage determined as follows: | |||
750 | // - if the enclosing namespace has internal linkage, the name has | |||
751 | // internal linkage; [handled above] | |||
752 | // - otherwise, if the declaration of the name is attached to a named | |||
753 | // module and is not exported, the name has module linkage; | |||
754 | // - otherwise, the name has external linkage. | |||
755 | // LV is currently set up to handle the last two bullets. | |||
756 | // | |||
757 | // The bullets are: | |||
758 | ||||
759 | // - a variable; or | |||
760 | if (const auto *Var = dyn_cast<VarDecl>(D)) { | |||
761 | // GCC applies the following optimization to variables and static | |||
762 | // data members, but not to functions: | |||
763 | // | |||
764 | // Modify the variable's LV by the LV of its type unless this is | |||
765 | // C or extern "C". This follows from [basic.link]p9: | |||
766 | // A type without linkage shall not be used as the type of a | |||
767 | // variable or function with external linkage unless | |||
768 | // - the entity has C language linkage, or | |||
769 | // - the entity is declared within an unnamed namespace, or | |||
770 | // - the entity is not used or is defined in the same | |||
771 | // translation unit. | |||
772 | // and [basic.link]p10: | |||
773 | // ...the types specified by all declarations referring to a | |||
774 | // given variable or function shall be identical... | |||
775 | // C does not have an equivalent rule. | |||
776 | // | |||
777 | // Ignore this if we've got an explicit attribute; the user | |||
778 | // probably knows what they're doing. | |||
779 | // | |||
780 | // Note that we don't want to make the variable non-external | |||
781 | // because of this, but unique-external linkage suits us. | |||
782 | if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Var) && | |||
783 | !IgnoreVarTypeLinkage) { | |||
784 | LinkageInfo TypeLV = getLVForType(*Var->getType(), computation); | |||
785 | if (!isExternallyVisible(TypeLV.getLinkage())) | |||
786 | return LinkageInfo::uniqueExternal(); | |||
787 | if (!LV.isVisibilityExplicit()) | |||
788 | LV.mergeVisibility(TypeLV); | |||
789 | } | |||
790 | ||||
791 | if (Var->getStorageClass() == SC_PrivateExtern) | |||
792 | LV.mergeVisibility(HiddenVisibility, true); | |||
793 | ||||
794 | // Note that Sema::MergeVarDecl already takes care of implementing | |||
795 | // C99 6.2.2p4 and propagating the visibility attribute, so we don't have | |||
796 | // to do it here. | |||
797 | ||||
798 | // As per function and class template specializations (below), | |||
799 | // consider LV for the template and template arguments. We're at file | |||
800 | // scope, so we do not need to worry about nested specializations. | |||
801 | if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(Var)) { | |||
802 | mergeTemplateLV(LV, spec, computation); | |||
803 | } | |||
804 | ||||
805 | // - a function; or | |||
806 | } else if (const auto *Function = dyn_cast<FunctionDecl>(D)) { | |||
807 | // In theory, we can modify the function's LV by the LV of its | |||
808 | // type unless it has C linkage (see comment above about variables | |||
809 | // for justification). In practice, GCC doesn't do this, so it's | |||
810 | // just too painful to make work. | |||
811 | ||||
812 | if (Function->getStorageClass() == SC_PrivateExtern) | |||
813 | LV.mergeVisibility(HiddenVisibility, true); | |||
814 | ||||
815 | // Note that Sema::MergeCompatibleFunctionDecls already takes care of | |||
816 | // merging storage classes and visibility attributes, so we don't have to | |||
817 | // look at previous decls in here. | |||
818 | ||||
819 | // In C++, then if the type of the function uses a type with | |||
820 | // unique-external linkage, it's not legally usable from outside | |||
821 | // this translation unit. However, we should use the C linkage | |||
822 | // rules instead for extern "C" declarations. | |||
823 | if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Function)) { | |||
824 | // Only look at the type-as-written. Otherwise, deducing the return type | |||
825 | // of a function could change its linkage. | |||
826 | QualType TypeAsWritten = Function->getType(); | |||
827 | if (TypeSourceInfo *TSI = Function->getTypeSourceInfo()) | |||
828 | TypeAsWritten = TSI->getType(); | |||
829 | if (!isExternallyVisible(TypeAsWritten->getLinkage())) | |||
830 | return LinkageInfo::uniqueExternal(); | |||
831 | } | |||
832 | ||||
833 | // Consider LV from the template and the template arguments. | |||
834 | // We're at file scope, so we do not need to worry about nested | |||
835 | // specializations. | |||
836 | if (FunctionTemplateSpecializationInfo *specInfo | |||
837 | = Function->getTemplateSpecializationInfo()) { | |||
838 | mergeTemplateLV(LV, Function, specInfo, computation); | |||
839 | } | |||
840 | ||||
841 | // - a named class (Clause 9), or an unnamed class defined in a | |||
842 | // typedef declaration in which the class has the typedef name | |||
843 | // for linkage purposes (7.1.3); or | |||
844 | // - a named enumeration (7.2), or an unnamed enumeration | |||
845 | // defined in a typedef declaration in which the enumeration | |||
846 | // has the typedef name for linkage purposes (7.1.3); or | |||
847 | } else if (const auto *Tag = dyn_cast<TagDecl>(D)) { | |||
848 | // Unnamed tags have no linkage. | |||
849 | if (!Tag->hasNameForLinkage()) | |||
850 | return LinkageInfo::none(); | |||
851 | ||||
852 | // If this is a class template specialization, consider the | |||
853 | // linkage of the template and template arguments. We're at file | |||
854 | // scope, so we do not need to worry about nested specializations. | |||
855 | if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(Tag)) { | |||
856 | mergeTemplateLV(LV, spec, computation); | |||
857 | } | |||
858 | ||||
859 | // FIXME: This is not part of the C++ standard any more. | |||
860 | // - an enumerator belonging to an enumeration with external linkage; or | |||
861 | } else if (isa<EnumConstantDecl>(D)) { | |||
862 | LinkageInfo EnumLV = getLVForDecl(cast<NamedDecl>(D->getDeclContext()), | |||
863 | computation); | |||
864 | if (!isExternalFormalLinkage(EnumLV.getLinkage())) | |||
865 | return LinkageInfo::none(); | |||
866 | LV.merge(EnumLV); | |||
867 | ||||
868 | // - a template | |||
869 | } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) { | |||
870 | bool considerVisibility = !hasExplicitVisibilityAlready(computation); | |||
871 | LinkageInfo tempLV = | |||
872 | getLVForTemplateParameterList(temp->getTemplateParameters(), computation); | |||
873 | LV.mergeMaybeWithVisibility(tempLV, considerVisibility); | |||
874 | ||||
875 | // An unnamed namespace or a namespace declared directly or indirectly | |||
876 | // within an unnamed namespace has internal linkage. All other namespaces | |||
877 | // have external linkage. | |||
878 | // | |||
879 | // We handled names in anonymous namespaces above. | |||
880 | } else if (isa<NamespaceDecl>(D)) { | |||
881 | return LV; | |||
882 | ||||
883 | // By extension, we assign external linkage to Objective-C | |||
884 | // interfaces. | |||
885 | } else if (isa<ObjCInterfaceDecl>(D)) { | |||
886 | // fallout | |||
887 | ||||
888 | } else if (auto *TD = dyn_cast<TypedefNameDecl>(D)) { | |||
889 | // A typedef declaration has linkage if it gives a type a name for | |||
890 | // linkage purposes. | |||
891 | if (!TD->getAnonDeclWithTypedefName(/*AnyRedecl*/true)) | |||
892 | return LinkageInfo::none(); | |||
893 | ||||
894 | // Everything not covered here has no linkage. | |||
895 | } else { | |||
896 | return LinkageInfo::none(); | |||
897 | } | |||
898 | ||||
899 | // If we ended up with non-externally-visible linkage, visibility should | |||
900 | // always be default. | |||
901 | if (!isExternallyVisible(LV.getLinkage())) | |||
902 | return LinkageInfo(LV.getLinkage(), DefaultVisibility, false); | |||
903 | ||||
904 | return LV; | |||
905 | } | |||
906 | ||||
907 | LinkageInfo | |||
908 | LinkageComputer::getLVForClassMember(const NamedDecl *D, | |||
909 | LVComputationKind computation, | |||
910 | bool IgnoreVarTypeLinkage) { | |||
911 | // Only certain class members have linkage. Note that fields don't | |||
912 | // really have linkage, but it's convenient to say they do for the | |||
913 | // purposes of calculating linkage of pointer-to-data-member | |||
914 | // template arguments. | |||
915 | // | |||
916 | // Templates also don't officially have linkage, but since we ignore | |||
917 | // the C++ standard and look at template arguments when determining | |||
918 | // linkage and visibility of a template specialization, we might hit | |||
919 | // a template template argument that way. If we do, we need to | |||
920 | // consider its linkage. | |||
921 | if (!(isa<CXXMethodDecl>(D) || | |||
922 | isa<VarDecl>(D) || | |||
923 | isa<FieldDecl>(D) || | |||
924 | isa<IndirectFieldDecl>(D) || | |||
925 | isa<TagDecl>(D) || | |||
926 | isa<TemplateDecl>(D))) | |||
927 | return LinkageInfo::none(); | |||
928 | ||||
929 | LinkageInfo LV; | |||
930 | ||||
931 | // If we have an explicit visibility attribute, merge that in. | |||
932 | if (!hasExplicitVisibilityAlready(computation)) { | |||
933 | if (Optional<Visibility> Vis = getExplicitVisibility(D, computation)) | |||
934 | LV.mergeVisibility(*Vis, true); | |||
935 | // If we're paying attention to global visibility, apply | |||
936 | // -finline-visibility-hidden if this is an inline method. | |||
937 | // | |||
938 | // Note that we do this before merging information about | |||
939 | // the class visibility. | |||
940 | if (!LV.isVisibilityExplicit() && useInlineVisibilityHidden(D)) | |||
941 | LV.mergeVisibility(HiddenVisibility, /*visibilityExplicit=*/false); | |||
942 | } | |||
943 | ||||
944 | // If this class member has an explicit visibility attribute, the only | |||
945 | // thing that can change its visibility is the template arguments, so | |||
946 | // only look for them when processing the class. | |||
947 | LVComputationKind classComputation = computation; | |||
948 | if (LV.isVisibilityExplicit()) | |||
949 | classComputation = withExplicitVisibilityAlready(computation); | |||
950 | ||||
951 | LinkageInfo classLV = | |||
952 | getLVForDecl(cast<RecordDecl>(D->getDeclContext()), classComputation); | |||
953 | // The member has the same linkage as the class. If that's not externally | |||
954 | // visible, we don't need to compute anything about the linkage. | |||
955 | // FIXME: If we're only computing linkage, can we bail out here? | |||
956 | if (!isExternallyVisible(classLV.getLinkage())) | |||
957 | return classLV; | |||
958 | ||||
959 | ||||
960 | // Otherwise, don't merge in classLV yet, because in certain cases | |||
961 | // we need to completely ignore the visibility from it. | |||
962 | ||||
963 | // Specifically, if this decl exists and has an explicit attribute. | |||
964 | const NamedDecl *explicitSpecSuppressor = nullptr; | |||
965 | ||||
966 | if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) { | |||
967 | // Only look at the type-as-written. Otherwise, deducing the return type | |||
968 | // of a function could change its linkage. | |||
969 | QualType TypeAsWritten = MD->getType(); | |||
970 | if (TypeSourceInfo *TSI = MD->getTypeSourceInfo()) | |||
971 | TypeAsWritten = TSI->getType(); | |||
972 | if (!isExternallyVisible(TypeAsWritten->getLinkage())) | |||
973 | return LinkageInfo::uniqueExternal(); | |||
974 | ||||
975 | // If this is a method template specialization, use the linkage for | |||
976 | // the template parameters and arguments. | |||
977 | if (FunctionTemplateSpecializationInfo *spec | |||
978 | = MD->getTemplateSpecializationInfo()) { | |||
979 | mergeTemplateLV(LV, MD, spec, computation); | |||
980 | if (spec->isExplicitSpecialization()) { | |||
981 | explicitSpecSuppressor = MD; | |||
982 | } else if (isExplicitMemberSpecialization(spec->getTemplate())) { | |||
983 | explicitSpecSuppressor = spec->getTemplate()->getTemplatedDecl(); | |||
984 | } | |||
985 | } else if (isExplicitMemberSpecialization(MD)) { | |||
986 | explicitSpecSuppressor = MD; | |||
987 | } | |||
988 | ||||
989 | } else if (const auto *RD = dyn_cast<CXXRecordDecl>(D)) { | |||
990 | if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(RD)) { | |||
991 | mergeTemplateLV(LV, spec, computation); | |||
992 | if (spec->isExplicitSpecialization()) { | |||
993 | explicitSpecSuppressor = spec; | |||
994 | } else { | |||
995 | const ClassTemplateDecl *temp = spec->getSpecializedTemplate(); | |||
996 | if (isExplicitMemberSpecialization(temp)) { | |||
997 | explicitSpecSuppressor = temp->getTemplatedDecl(); | |||
998 | } | |||
999 | } | |||
1000 | } else if (isExplicitMemberSpecialization(RD)) { | |||
1001 | explicitSpecSuppressor = RD; | |||
1002 | } | |||
1003 | ||||
1004 | // Static data members. | |||
1005 | } else if (const auto *VD = dyn_cast<VarDecl>(D)) { | |||
1006 | if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(VD)) | |||
1007 | mergeTemplateLV(LV, spec, computation); | |||
1008 | ||||
1009 | // Modify the variable's linkage by its type, but ignore the | |||
1010 | // type's visibility unless it's a definition. | |||
1011 | if (!IgnoreVarTypeLinkage) { | |||
1012 | LinkageInfo typeLV = getLVForType(*VD->getType(), computation); | |||
1013 | // FIXME: If the type's linkage is not externally visible, we can | |||
1014 | // give this static data member UniqueExternalLinkage. | |||
1015 | if (!LV.isVisibilityExplicit() && !classLV.isVisibilityExplicit()) | |||
1016 | LV.mergeVisibility(typeLV); | |||
1017 | LV.mergeExternalVisibility(typeLV); | |||
1018 | } | |||
1019 | ||||
1020 | if (isExplicitMemberSpecialization(VD)) { | |||
1021 | explicitSpecSuppressor = VD; | |||
1022 | } | |||
1023 | ||||
1024 | // Template members. | |||
1025 | } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) { | |||
1026 | bool considerVisibility = | |||
1027 | (!LV.isVisibilityExplicit() && | |||
1028 | !classLV.isVisibilityExplicit() && | |||
1029 | !hasExplicitVisibilityAlready(computation)); | |||
1030 | LinkageInfo tempLV = | |||
1031 | getLVForTemplateParameterList(temp->getTemplateParameters(), computation); | |||
1032 | LV.mergeMaybeWithVisibility(tempLV, considerVisibility); | |||
1033 | ||||
1034 | if (const auto *redeclTemp = dyn_cast<RedeclarableTemplateDecl>(temp)) { | |||
1035 | if (isExplicitMemberSpecialization(redeclTemp)) { | |||
1036 | explicitSpecSuppressor = temp->getTemplatedDecl(); | |||
1037 | } | |||
1038 | } | |||
1039 | } | |||
1040 | ||||
1041 | // We should never be looking for an attribute directly on a template. | |||
1042 | assert(!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor))((!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor )) ? static_cast<void> (0) : __assert_fail ("!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor)" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1042, __PRETTY_FUNCTION__)); | |||
1043 | ||||
1044 | // If this member is an explicit member specialization, and it has | |||
1045 | // an explicit attribute, ignore visibility from the parent. | |||
1046 | bool considerClassVisibility = true; | |||
1047 | if (explicitSpecSuppressor && | |||
1048 | // optimization: hasDVA() is true only with explicit visibility. | |||
1049 | LV.isVisibilityExplicit() && | |||
1050 | classLV.getVisibility() != DefaultVisibility && | |||
1051 | hasDirectVisibilityAttribute(explicitSpecSuppressor, computation)) { | |||
1052 | considerClassVisibility = false; | |||
1053 | } | |||
1054 | ||||
1055 | // Finally, merge in information from the class. | |||
1056 | LV.mergeMaybeWithVisibility(classLV, considerClassVisibility); | |||
1057 | return LV; | |||
1058 | } | |||
1059 | ||||
1060 | void NamedDecl::anchor() {} | |||
1061 | ||||
1062 | bool NamedDecl::isLinkageValid() const { | |||
1063 | if (!hasCachedLinkage()) | |||
1064 | return true; | |||
1065 | ||||
1066 | Linkage L = LinkageComputer{} | |||
1067 | .computeLVForDecl(this, LVComputationKind::forLinkageOnly()) | |||
1068 | .getLinkage(); | |||
1069 | return L == getCachedLinkage(); | |||
1070 | } | |||
1071 | ||||
1072 | ObjCStringFormatFamily NamedDecl::getObjCFStringFormattingFamily() const { | |||
1073 | StringRef name = getName(); | |||
1074 | if (name.empty()) return SFF_None; | |||
1075 | ||||
1076 | if (name.front() == 'C') | |||
1077 | if (name == "CFStringCreateWithFormat" || | |||
1078 | name == "CFStringCreateWithFormatAndArguments" || | |||
1079 | name == "CFStringAppendFormat" || | |||
1080 | name == "CFStringAppendFormatAndArguments") | |||
1081 | return SFF_CFString; | |||
1082 | return SFF_None; | |||
1083 | } | |||
1084 | ||||
1085 | Linkage NamedDecl::getLinkageInternal() const { | |||
1086 | // We don't care about visibility here, so ask for the cheapest | |||
1087 | // possible visibility analysis. | |||
1088 | return LinkageComputer{} | |||
1089 | .getLVForDecl(this, LVComputationKind::forLinkageOnly()) | |||
1090 | .getLinkage(); | |||
1091 | } | |||
1092 | ||||
1093 | LinkageInfo NamedDecl::getLinkageAndVisibility() const { | |||
1094 | return LinkageComputer{}.getDeclLinkageAndVisibility(this); | |||
1095 | } | |||
1096 | ||||
1097 | static Optional<Visibility> | |||
1098 | getExplicitVisibilityAux(const NamedDecl *ND, | |||
1099 | NamedDecl::ExplicitVisibilityKind kind, | |||
1100 | bool IsMostRecent) { | |||
1101 | assert(!IsMostRecent || ND == ND->getMostRecentDecl())((!IsMostRecent || ND == ND->getMostRecentDecl()) ? static_cast <void> (0) : __assert_fail ("!IsMostRecent || ND == ND->getMostRecentDecl()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1101, __PRETTY_FUNCTION__)); | |||
1102 | ||||
1103 | // Check the declaration itself first. | |||
1104 | if (Optional<Visibility> V = getVisibilityOf(ND, kind)) | |||
1105 | return V; | |||
1106 | ||||
1107 | // If this is a member class of a specialization of a class template | |||
1108 | // and the corresponding decl has explicit visibility, use that. | |||
1109 | if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) { | |||
1110 | CXXRecordDecl *InstantiatedFrom = RD->getInstantiatedFromMemberClass(); | |||
1111 | if (InstantiatedFrom) | |||
1112 | return getVisibilityOf(InstantiatedFrom, kind); | |||
1113 | } | |||
1114 | ||||
1115 | // If there wasn't explicit visibility there, and this is a | |||
1116 | // specialization of a class template, check for visibility | |||
1117 | // on the pattern. | |||
1118 | if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(ND)) { | |||
1119 | // Walk all the template decl till this point to see if there are | |||
1120 | // explicit visibility attributes. | |||
1121 | const auto *TD = spec->getSpecializedTemplate()->getTemplatedDecl(); | |||
1122 | while (TD != nullptr) { | |||
1123 | auto Vis = getVisibilityOf(TD, kind); | |||
1124 | if (Vis != None) | |||
1125 | return Vis; | |||
1126 | TD = TD->getPreviousDecl(); | |||
1127 | } | |||
1128 | return None; | |||
1129 | } | |||
1130 | ||||
1131 | // Use the most recent declaration. | |||
1132 | if (!IsMostRecent && !isa<NamespaceDecl>(ND)) { | |||
1133 | const NamedDecl *MostRecent = ND->getMostRecentDecl(); | |||
1134 | if (MostRecent != ND) | |||
1135 | return getExplicitVisibilityAux(MostRecent, kind, true); | |||
1136 | } | |||
1137 | ||||
1138 | if (const auto *Var = dyn_cast<VarDecl>(ND)) { | |||
1139 | if (Var->isStaticDataMember()) { | |||
1140 | VarDecl *InstantiatedFrom = Var->getInstantiatedFromStaticDataMember(); | |||
1141 | if (InstantiatedFrom) | |||
1142 | return getVisibilityOf(InstantiatedFrom, kind); | |||
1143 | } | |||
1144 | ||||
1145 | if (const auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Var)) | |||
1146 | return getVisibilityOf(VTSD->getSpecializedTemplate()->getTemplatedDecl(), | |||
1147 | kind); | |||
1148 | ||||
1149 | return None; | |||
1150 | } | |||
1151 | // Also handle function template specializations. | |||
1152 | if (const auto *fn = dyn_cast<FunctionDecl>(ND)) { | |||
1153 | // If the function is a specialization of a template with an | |||
1154 | // explicit visibility attribute, use that. | |||
1155 | if (FunctionTemplateSpecializationInfo *templateInfo | |||
1156 | = fn->getTemplateSpecializationInfo()) | |||
1157 | return getVisibilityOf(templateInfo->getTemplate()->getTemplatedDecl(), | |||
1158 | kind); | |||
1159 | ||||
1160 | // If the function is a member of a specialization of a class template | |||
1161 | // and the corresponding decl has explicit visibility, use that. | |||
1162 | FunctionDecl *InstantiatedFrom = fn->getInstantiatedFromMemberFunction(); | |||
1163 | if (InstantiatedFrom) | |||
1164 | return getVisibilityOf(InstantiatedFrom, kind); | |||
1165 | ||||
1166 | return None; | |||
1167 | } | |||
1168 | ||||
1169 | // The visibility of a template is stored in the templated decl. | |||
1170 | if (const auto *TD = dyn_cast<TemplateDecl>(ND)) | |||
1171 | return getVisibilityOf(TD->getTemplatedDecl(), kind); | |||
1172 | ||||
1173 | return None; | |||
1174 | } | |||
1175 | ||||
1176 | Optional<Visibility> | |||
1177 | NamedDecl::getExplicitVisibility(ExplicitVisibilityKind kind) const { | |||
1178 | return getExplicitVisibilityAux(this, kind, false); | |||
1179 | } | |||
1180 | ||||
1181 | LinkageInfo LinkageComputer::getLVForClosure(const DeclContext *DC, | |||
1182 | Decl *ContextDecl, | |||
1183 | LVComputationKind computation) { | |||
1184 | // This lambda has its linkage/visibility determined by its owner. | |||
1185 | const NamedDecl *Owner; | |||
1186 | if (!ContextDecl) | |||
1187 | Owner = dyn_cast<NamedDecl>(DC); | |||
1188 | else if (isa<ParmVarDecl>(ContextDecl)) | |||
1189 | Owner = | |||
1190 | dyn_cast<NamedDecl>(ContextDecl->getDeclContext()->getRedeclContext()); | |||
1191 | else | |||
1192 | Owner = cast<NamedDecl>(ContextDecl); | |||
1193 | ||||
1194 | if (!Owner) | |||
1195 | return LinkageInfo::none(); | |||
1196 | ||||
1197 | // If the owner has a deduced type, we need to skip querying the linkage and | |||
1198 | // visibility of that type, because it might involve this closure type. The | |||
1199 | // only effect of this is that we might give a lambda VisibleNoLinkage rather | |||
1200 | // than NoLinkage when we don't strictly need to, which is benign. | |||
1201 | auto *VD = dyn_cast<VarDecl>(Owner); | |||
1202 | LinkageInfo OwnerLV = | |||
1203 | VD && VD->getType()->getContainedDeducedType() | |||
1204 | ? computeLVForDecl(Owner, computation, /*IgnoreVarTypeLinkage*/true) | |||
1205 | : getLVForDecl(Owner, computation); | |||
1206 | ||||
1207 | // A lambda never formally has linkage. But if the owner is externally | |||
1208 | // visible, then the lambda is too. We apply the same rules to blocks. | |||
1209 | if (!isExternallyVisible(OwnerLV.getLinkage())) | |||
1210 | return LinkageInfo::none(); | |||
1211 | return LinkageInfo(VisibleNoLinkage, OwnerLV.getVisibility(), | |||
1212 | OwnerLV.isVisibilityExplicit()); | |||
1213 | } | |||
1214 | ||||
1215 | LinkageInfo LinkageComputer::getLVForLocalDecl(const NamedDecl *D, | |||
1216 | LVComputationKind computation) { | |||
1217 | if (const auto *Function = dyn_cast<FunctionDecl>(D)) { | |||
1218 | if (Function->isInAnonymousNamespace() && | |||
1219 | !isFirstInExternCContext(Function)) | |||
1220 | return getInternalLinkageFor(Function); | |||
1221 | ||||
1222 | // This is a "void f();" which got merged with a file static. | |||
1223 | if (Function->getCanonicalDecl()->getStorageClass() == SC_Static) | |||
1224 | return getInternalLinkageFor(Function); | |||
1225 | ||||
1226 | LinkageInfo LV; | |||
1227 | if (!hasExplicitVisibilityAlready(computation)) { | |||
1228 | if (Optional<Visibility> Vis = | |||
1229 | getExplicitVisibility(Function, computation)) | |||
1230 | LV.mergeVisibility(*Vis, true); | |||
1231 | } | |||
1232 | ||||
1233 | // Note that Sema::MergeCompatibleFunctionDecls already takes care of | |||
1234 | // merging storage classes and visibility attributes, so we don't have to | |||
1235 | // look at previous decls in here. | |||
1236 | ||||
1237 | return LV; | |||
1238 | } | |||
1239 | ||||
1240 | if (const auto *Var = dyn_cast<VarDecl>(D)) { | |||
1241 | if (Var->hasExternalStorage()) { | |||
1242 | if (Var->isInAnonymousNamespace() && !isFirstInExternCContext(Var)) | |||
1243 | return getInternalLinkageFor(Var); | |||
1244 | ||||
1245 | LinkageInfo LV; | |||
1246 | if (Var->getStorageClass() == SC_PrivateExtern) | |||
1247 | LV.mergeVisibility(HiddenVisibility, true); | |||
1248 | else if (!hasExplicitVisibilityAlready(computation)) { | |||
1249 | if (Optional<Visibility> Vis = getExplicitVisibility(Var, computation)) | |||
1250 | LV.mergeVisibility(*Vis, true); | |||
1251 | } | |||
1252 | ||||
1253 | if (const VarDecl *Prev = Var->getPreviousDecl()) { | |||
1254 | LinkageInfo PrevLV = getLVForDecl(Prev, computation); | |||
1255 | if (PrevLV.getLinkage()) | |||
1256 | LV.setLinkage(PrevLV.getLinkage()); | |||
1257 | LV.mergeVisibility(PrevLV); | |||
1258 | } | |||
1259 | ||||
1260 | return LV; | |||
1261 | } | |||
1262 | ||||
1263 | if (!Var->isStaticLocal()) | |||
1264 | return LinkageInfo::none(); | |||
1265 | } | |||
1266 | ||||
1267 | ASTContext &Context = D->getASTContext(); | |||
1268 | if (!Context.getLangOpts().CPlusPlus) | |||
1269 | return LinkageInfo::none(); | |||
1270 | ||||
1271 | const Decl *OuterD = getOutermostFuncOrBlockContext(D); | |||
1272 | if (!OuterD || OuterD->isInvalidDecl()) | |||
1273 | return LinkageInfo::none(); | |||
1274 | ||||
1275 | LinkageInfo LV; | |||
1276 | if (const auto *BD = dyn_cast<BlockDecl>(OuterD)) { | |||
1277 | if (!BD->getBlockManglingNumber()) | |||
1278 | return LinkageInfo::none(); | |||
1279 | ||||
1280 | LV = getLVForClosure(BD->getDeclContext()->getRedeclContext(), | |||
1281 | BD->getBlockManglingContextDecl(), computation); | |||
1282 | } else { | |||
1283 | const auto *FD = cast<FunctionDecl>(OuterD); | |||
1284 | if (!FD->isInlined() && | |||
1285 | !isTemplateInstantiation(FD->getTemplateSpecializationKind())) | |||
1286 | return LinkageInfo::none(); | |||
1287 | ||||
1288 | // If a function is hidden by -fvisibility-inlines-hidden option and | |||
1289 | // is not explicitly attributed as a hidden function, | |||
1290 | // we should not make static local variables in the function hidden. | |||
1291 | LV = getLVForDecl(FD, computation); | |||
1292 | if (isa<VarDecl>(D) && useInlineVisibilityHidden(FD) && | |||
1293 | !LV.isVisibilityExplicit()) { | |||
1294 | assert(cast<VarDecl>(D)->isStaticLocal())((cast<VarDecl>(D)->isStaticLocal()) ? static_cast< void> (0) : __assert_fail ("cast<VarDecl>(D)->isStaticLocal()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1294, __PRETTY_FUNCTION__)); | |||
1295 | // If this was an implicitly hidden inline method, check again for | |||
1296 | // explicit visibility on the parent class, and use that for static locals | |||
1297 | // if present. | |||
1298 | if (const auto *MD = dyn_cast<CXXMethodDecl>(FD)) | |||
1299 | LV = getLVForDecl(MD->getParent(), computation); | |||
1300 | if (!LV.isVisibilityExplicit()) { | |||
1301 | Visibility globalVisibility = | |||
1302 | computation.isValueVisibility() | |||
1303 | ? Context.getLangOpts().getValueVisibilityMode() | |||
1304 | : Context.getLangOpts().getTypeVisibilityMode(); | |||
1305 | return LinkageInfo(VisibleNoLinkage, globalVisibility, | |||
1306 | /*visibilityExplicit=*/false); | |||
1307 | } | |||
1308 | } | |||
1309 | } | |||
1310 | if (!isExternallyVisible(LV.getLinkage())) | |||
1311 | return LinkageInfo::none(); | |||
1312 | return LinkageInfo(VisibleNoLinkage, LV.getVisibility(), | |||
1313 | LV.isVisibilityExplicit()); | |||
1314 | } | |||
1315 | ||||
1316 | static inline const CXXRecordDecl* | |||
1317 | getOutermostEnclosingLambda(const CXXRecordDecl *Record) { | |||
1318 | const CXXRecordDecl *Ret = Record; | |||
1319 | while (Record && Record->isLambda()) { | |||
1320 | Ret = Record; | |||
1321 | if (!Record->getParent()) break; | |||
1322 | // Get the Containing Class of this Lambda Class | |||
1323 | Record = dyn_cast_or_null<CXXRecordDecl>( | |||
1324 | Record->getParent()->getParent()); | |||
1325 | } | |||
1326 | return Ret; | |||
1327 | } | |||
1328 | ||||
1329 | LinkageInfo LinkageComputer::computeLVForDecl(const NamedDecl *D, | |||
1330 | LVComputationKind computation, | |||
1331 | bool IgnoreVarTypeLinkage) { | |||
1332 | // Internal_linkage attribute overrides other considerations. | |||
1333 | if (D->hasAttr<InternalLinkageAttr>()) | |||
1334 | return getInternalLinkageFor(D); | |||
1335 | ||||
1336 | // Objective-C: treat all Objective-C declarations as having external | |||
1337 | // linkage. | |||
1338 | switch (D->getKind()) { | |||
1339 | default: | |||
1340 | break; | |||
1341 | ||||
1342 | // Per C++ [basic.link]p2, only the names of objects, references, | |||
1343 | // functions, types, templates, namespaces, and values ever have linkage. | |||
1344 | // | |||
1345 | // Note that the name of a typedef, namespace alias, using declaration, | |||
1346 | // and so on are not the name of the corresponding type, namespace, or | |||
1347 | // declaration, so they do *not* have linkage. | |||
1348 | case Decl::ImplicitParam: | |||
1349 | case Decl::Label: | |||
1350 | case Decl::NamespaceAlias: | |||
1351 | case Decl::ParmVar: | |||
1352 | case Decl::Using: | |||
1353 | case Decl::UsingShadow: | |||
1354 | case Decl::UsingDirective: | |||
1355 | return LinkageInfo::none(); | |||
1356 | ||||
1357 | case Decl::EnumConstant: | |||
1358 | // C++ [basic.link]p4: an enumerator has the linkage of its enumeration. | |||
1359 | if (D->getASTContext().getLangOpts().CPlusPlus) | |||
1360 | return getLVForDecl(cast<EnumDecl>(D->getDeclContext()), computation); | |||
1361 | return LinkageInfo::visible_none(); | |||
1362 | ||||
1363 | case Decl::Typedef: | |||
1364 | case Decl::TypeAlias: | |||
1365 | // A typedef declaration has linkage if it gives a type a name for | |||
1366 | // linkage purposes. | |||
1367 | if (!cast<TypedefNameDecl>(D) | |||
1368 | ->getAnonDeclWithTypedefName(/*AnyRedecl*/true)) | |||
1369 | return LinkageInfo::none(); | |||
1370 | break; | |||
1371 | ||||
1372 | case Decl::TemplateTemplateParm: // count these as external | |||
1373 | case Decl::NonTypeTemplateParm: | |||
1374 | case Decl::ObjCAtDefsField: | |||
1375 | case Decl::ObjCCategory: | |||
1376 | case Decl::ObjCCategoryImpl: | |||
1377 | case Decl::ObjCCompatibleAlias: | |||
1378 | case Decl::ObjCImplementation: | |||
1379 | case Decl::ObjCMethod: | |||
1380 | case Decl::ObjCProperty: | |||
1381 | case Decl::ObjCPropertyImpl: | |||
1382 | case Decl::ObjCProtocol: | |||
1383 | return getExternalLinkageFor(D); | |||
1384 | ||||
1385 | case Decl::CXXRecord: { | |||
1386 | const auto *Record = cast<CXXRecordDecl>(D); | |||
1387 | if (Record->isLambda()) { | |||
1388 | if (!Record->getLambdaManglingNumber()) { | |||
1389 | // This lambda has no mangling number, so it's internal. | |||
1390 | return getInternalLinkageFor(D); | |||
1391 | } | |||
1392 | ||||
1393 | // This lambda has its linkage/visibility determined: | |||
1394 | // - either by the outermost lambda if that lambda has no mangling | |||
1395 | // number. | |||
1396 | // - or by the parent of the outer most lambda | |||
1397 | // This prevents infinite recursion in settings such as nested lambdas | |||
1398 | // used in NSDMI's, for e.g. | |||
1399 | // struct L { | |||
1400 | // int t{}; | |||
1401 | // int t2 = ([](int a) { return [](int b) { return b; };})(t)(t); | |||
1402 | // }; | |||
1403 | const CXXRecordDecl *OuterMostLambda = | |||
1404 | getOutermostEnclosingLambda(Record); | |||
1405 | if (!OuterMostLambda->getLambdaManglingNumber()) | |||
1406 | return getInternalLinkageFor(D); | |||
1407 | ||||
1408 | return getLVForClosure( | |||
1409 | OuterMostLambda->getDeclContext()->getRedeclContext(), | |||
1410 | OuterMostLambda->getLambdaContextDecl(), computation); | |||
1411 | } | |||
1412 | ||||
1413 | break; | |||
1414 | } | |||
1415 | } | |||
1416 | ||||
1417 | // Handle linkage for namespace-scope names. | |||
1418 | if (D->getDeclContext()->getRedeclContext()->isFileContext()) | |||
1419 | return getLVForNamespaceScopeDecl(D, computation, IgnoreVarTypeLinkage); | |||
1420 | ||||
1421 | // C++ [basic.link]p5: | |||
1422 | // In addition, a member function, static data member, a named | |||
1423 | // class or enumeration of class scope, or an unnamed class or | |||
1424 | // enumeration defined in a class-scope typedef declaration such | |||
1425 | // that the class or enumeration has the typedef name for linkage | |||
1426 | // purposes (7.1.3), has external linkage if the name of the class | |||
1427 | // has external linkage. | |||
1428 | if (D->getDeclContext()->isRecord()) | |||
1429 | return getLVForClassMember(D, computation, IgnoreVarTypeLinkage); | |||
1430 | ||||
1431 | // C++ [basic.link]p6: | |||
1432 | // The name of a function declared in block scope and the name of | |||
1433 | // an object declared by a block scope extern declaration have | |||
1434 | // linkage. If there is a visible declaration of an entity with | |||
1435 | // linkage having the same name and type, ignoring entities | |||
1436 | // declared outside the innermost enclosing namespace scope, the | |||
1437 | // block scope declaration declares that same entity and receives | |||
1438 | // the linkage of the previous declaration. If there is more than | |||
1439 | // one such matching entity, the program is ill-formed. Otherwise, | |||
1440 | // if no matching entity is found, the block scope entity receives | |||
1441 | // external linkage. | |||
1442 | if (D->getDeclContext()->isFunctionOrMethod()) | |||
1443 | return getLVForLocalDecl(D, computation); | |||
1444 | ||||
1445 | // C++ [basic.link]p6: | |||
1446 | // Names not covered by these rules have no linkage. | |||
1447 | return LinkageInfo::none(); | |||
1448 | } | |||
1449 | ||||
1450 | /// getLVForDecl - Get the linkage and visibility for the given declaration. | |||
1451 | LinkageInfo LinkageComputer::getLVForDecl(const NamedDecl *D, | |||
1452 | LVComputationKind computation) { | |||
1453 | // Internal_linkage attribute overrides other considerations. | |||
1454 | if (D->hasAttr<InternalLinkageAttr>()) | |||
1455 | return getInternalLinkageFor(D); | |||
1456 | ||||
1457 | if (computation.IgnoreAllVisibility && D->hasCachedLinkage()) | |||
1458 | return LinkageInfo(D->getCachedLinkage(), DefaultVisibility, false); | |||
1459 | ||||
1460 | if (llvm::Optional<LinkageInfo> LI = lookup(D, computation)) | |||
1461 | return *LI; | |||
1462 | ||||
1463 | LinkageInfo LV = computeLVForDecl(D, computation); | |||
1464 | if (D->hasCachedLinkage()) | |||
1465 | assert(D->getCachedLinkage() == LV.getLinkage())((D->getCachedLinkage() == LV.getLinkage()) ? static_cast< void> (0) : __assert_fail ("D->getCachedLinkage() == LV.getLinkage()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1465, __PRETTY_FUNCTION__)); | |||
1466 | ||||
1467 | D->setCachedLinkage(LV.getLinkage()); | |||
1468 | cache(D, computation, LV); | |||
1469 | ||||
1470 | #ifndef NDEBUG | |||
1471 | // In C (because of gnu inline) and in c++ with microsoft extensions an | |||
1472 | // static can follow an extern, so we can have two decls with different | |||
1473 | // linkages. | |||
1474 | const LangOptions &Opts = D->getASTContext().getLangOpts(); | |||
1475 | if (!Opts.CPlusPlus || Opts.MicrosoftExt) | |||
1476 | return LV; | |||
1477 | ||||
1478 | // We have just computed the linkage for this decl. By induction we know | |||
1479 | // that all other computed linkages match, check that the one we just | |||
1480 | // computed also does. | |||
1481 | NamedDecl *Old = nullptr; | |||
1482 | for (auto I : D->redecls()) { | |||
1483 | auto *T = cast<NamedDecl>(I); | |||
1484 | if (T == D) | |||
1485 | continue; | |||
1486 | if (!T->isInvalidDecl() && T->hasCachedLinkage()) { | |||
1487 | Old = T; | |||
1488 | break; | |||
1489 | } | |||
1490 | } | |||
1491 | assert(!Old || Old->getCachedLinkage() == D->getCachedLinkage())((!Old || Old->getCachedLinkage() == D->getCachedLinkage ()) ? static_cast<void> (0) : __assert_fail ("!Old || Old->getCachedLinkage() == D->getCachedLinkage()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1491, __PRETTY_FUNCTION__)); | |||
1492 | #endif | |||
1493 | ||||
1494 | return LV; | |||
1495 | } | |||
1496 | ||||
1497 | LinkageInfo LinkageComputer::getDeclLinkageAndVisibility(const NamedDecl *D) { | |||
1498 | return getLVForDecl(D, | |||
1499 | LVComputationKind(usesTypeVisibility(D) | |||
1500 | ? NamedDecl::VisibilityForType | |||
1501 | : NamedDecl::VisibilityForValue)); | |||
1502 | } | |||
1503 | ||||
1504 | Module *Decl::getOwningModuleForLinkage(bool IgnoreLinkage) const { | |||
1505 | Module *M = getOwningModule(); | |||
1506 | if (!M) | |||
1507 | return nullptr; | |||
1508 | ||||
1509 | switch (M->Kind) { | |||
1510 | case Module::ModuleMapModule: | |||
1511 | // Module map modules have no special linkage semantics. | |||
1512 | return nullptr; | |||
1513 | ||||
1514 | case Module::ModuleInterfaceUnit: | |||
1515 | return M; | |||
1516 | ||||
1517 | case Module::GlobalModuleFragment: { | |||
1518 | // External linkage declarations in the global module have no owning module | |||
1519 | // for linkage purposes. But internal linkage declarations in the global | |||
1520 | // module fragment of a particular module are owned by that module for | |||
1521 | // linkage purposes. | |||
1522 | if (IgnoreLinkage) | |||
1523 | return nullptr; | |||
1524 | bool InternalLinkage; | |||
1525 | if (auto *ND = dyn_cast<NamedDecl>(this)) | |||
1526 | InternalLinkage = !ND->hasExternalFormalLinkage(); | |||
1527 | else { | |||
1528 | auto *NSD = dyn_cast<NamespaceDecl>(this); | |||
1529 | InternalLinkage = (NSD && NSD->isAnonymousNamespace()) || | |||
1530 | isInAnonymousNamespace(); | |||
1531 | } | |||
1532 | return InternalLinkage ? M->Parent : nullptr; | |||
1533 | } | |||
1534 | ||||
1535 | case Module::PrivateModuleFragment: | |||
1536 | // The private module fragment is part of its containing module for linkage | |||
1537 | // purposes. | |||
1538 | return M->Parent; | |||
1539 | } | |||
1540 | ||||
1541 | llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1541); | |||
1542 | } | |||
1543 | ||||
1544 | void NamedDecl::printName(raw_ostream &os) const { | |||
1545 | os << Name; | |||
1546 | } | |||
1547 | ||||
1548 | std::string NamedDecl::getQualifiedNameAsString() const { | |||
1549 | std::string QualName; | |||
1550 | llvm::raw_string_ostream OS(QualName); | |||
1551 | printQualifiedName(OS, getASTContext().getPrintingPolicy()); | |||
1552 | return OS.str(); | |||
1553 | } | |||
1554 | ||||
1555 | void NamedDecl::printQualifiedName(raw_ostream &OS) const { | |||
1556 | printQualifiedName(OS, getASTContext().getPrintingPolicy()); | |||
1557 | } | |||
1558 | ||||
1559 | void NamedDecl::printQualifiedName(raw_ostream &OS, | |||
1560 | const PrintingPolicy &P) const { | |||
1561 | const DeclContext *Ctx = getDeclContext(); | |||
1562 | ||||
1563 | // For ObjC methods and properties, look through categories and use the | |||
1564 | // interface as context. | |||
1565 | if (auto *MD = dyn_cast<ObjCMethodDecl>(this)) | |||
1566 | if (auto *ID = MD->getClassInterface()) | |||
1567 | Ctx = ID; | |||
1568 | if (auto *PD = dyn_cast<ObjCPropertyDecl>(this)) { | |||
1569 | if (auto *MD = PD->getGetterMethodDecl()) | |||
1570 | if (auto *ID = MD->getClassInterface()) | |||
1571 | Ctx = ID; | |||
1572 | } | |||
1573 | ||||
1574 | if (Ctx->isFunctionOrMethod()) { | |||
1575 | printName(OS); | |||
1576 | return; | |||
1577 | } | |||
1578 | ||||
1579 | using ContextsTy = SmallVector<const DeclContext *, 8>; | |||
1580 | ContextsTy Contexts; | |||
1581 | ||||
1582 | // Collect named contexts. | |||
1583 | while (Ctx) { | |||
1584 | if (isa<NamedDecl>(Ctx)) | |||
1585 | Contexts.push_back(Ctx); | |||
1586 | Ctx = Ctx->getParent(); | |||
1587 | } | |||
1588 | ||||
1589 | for (const DeclContext *DC : llvm::reverse(Contexts)) { | |||
1590 | if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(DC)) { | |||
1591 | OS << Spec->getName(); | |||
1592 | const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); | |||
1593 | printTemplateArgumentList(OS, TemplateArgs.asArray(), P); | |||
1594 | } else if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) { | |||
1595 | if (P.SuppressUnwrittenScope && | |||
1596 | (ND->isAnonymousNamespace() || ND->isInline())) | |||
1597 | continue; | |||
1598 | if (ND->isAnonymousNamespace()) { | |||
1599 | OS << (P.MSVCFormatting ? "`anonymous namespace\'" | |||
1600 | : "(anonymous namespace)"); | |||
1601 | } | |||
1602 | else | |||
1603 | OS << *ND; | |||
1604 | } else if (const auto *RD = dyn_cast<RecordDecl>(DC)) { | |||
1605 | if (!RD->getIdentifier()) | |||
1606 | OS << "(anonymous " << RD->getKindName() << ')'; | |||
1607 | else | |||
1608 | OS << *RD; | |||
1609 | } else if (const auto *FD = dyn_cast<FunctionDecl>(DC)) { | |||
1610 | const FunctionProtoType *FT = nullptr; | |||
1611 | if (FD->hasWrittenPrototype()) | |||
1612 | FT = dyn_cast<FunctionProtoType>(FD->getType()->castAs<FunctionType>()); | |||
1613 | ||||
1614 | OS << *FD << '('; | |||
1615 | if (FT) { | |||
1616 | unsigned NumParams = FD->getNumParams(); | |||
1617 | for (unsigned i = 0; i < NumParams; ++i) { | |||
1618 | if (i) | |||
1619 | OS << ", "; | |||
1620 | OS << FD->getParamDecl(i)->getType().stream(P); | |||
1621 | } | |||
1622 | ||||
1623 | if (FT->isVariadic()) { | |||
1624 | if (NumParams > 0) | |||
1625 | OS << ", "; | |||
1626 | OS << "..."; | |||
1627 | } | |||
1628 | } | |||
1629 | OS << ')'; | |||
1630 | } else if (const auto *ED = dyn_cast<EnumDecl>(DC)) { | |||
1631 | // C++ [dcl.enum]p10: Each enum-name and each unscoped | |||
1632 | // enumerator is declared in the scope that immediately contains | |||
1633 | // the enum-specifier. Each scoped enumerator is declared in the | |||
1634 | // scope of the enumeration. | |||
1635 | // For the case of unscoped enumerator, do not include in the qualified | |||
1636 | // name any information about its enum enclosing scope, as its visibility | |||
1637 | // is global. | |||
1638 | if (ED->isScoped()) | |||
1639 | OS << *ED; | |||
1640 | else | |||
1641 | continue; | |||
1642 | } else { | |||
1643 | OS << *cast<NamedDecl>(DC); | |||
1644 | } | |||
1645 | OS << "::"; | |||
1646 | } | |||
1647 | ||||
1648 | if (getDeclName() || isa<DecompositionDecl>(this)) | |||
1649 | OS << *this; | |||
1650 | else | |||
1651 | OS << "(anonymous)"; | |||
1652 | } | |||
1653 | ||||
1654 | void NamedDecl::getNameForDiagnostic(raw_ostream &OS, | |||
1655 | const PrintingPolicy &Policy, | |||
1656 | bool Qualified) const { | |||
1657 | if (Qualified) | |||
1658 | printQualifiedName(OS, Policy); | |||
1659 | else | |||
1660 | printName(OS); | |||
1661 | } | |||
1662 | ||||
1663 | template<typename T> static bool isRedeclarableImpl(Redeclarable<T> *) { | |||
1664 | return true; | |||
1665 | } | |||
1666 | static bool isRedeclarableImpl(...) { return false; } | |||
1667 | static bool isRedeclarable(Decl::Kind K) { | |||
1668 | switch (K) { | |||
1669 | #define DECL(Type, Base) \ | |||
1670 | case Decl::Type: \ | |||
1671 | return isRedeclarableImpl((Type##Decl *)nullptr); | |||
1672 | #define ABSTRACT_DECL(DECL) | |||
1673 | #include "clang/AST/DeclNodes.inc" | |||
1674 | } | |||
1675 | llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1675); | |||
1676 | } | |||
1677 | ||||
1678 | bool NamedDecl::declarationReplaces(NamedDecl *OldD, bool IsKnownNewer) const { | |||
1679 | assert(getDeclName() == OldD->getDeclName() && "Declaration name mismatch")((getDeclName() == OldD->getDeclName() && "Declaration name mismatch" ) ? static_cast<void> (0) : __assert_fail ("getDeclName() == OldD->getDeclName() && \"Declaration name mismatch\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1679, __PRETTY_FUNCTION__)); | |||
1680 | ||||
1681 | // Never replace one imported declaration with another; we need both results | |||
1682 | // when re-exporting. | |||
1683 | if (OldD->isFromASTFile() && isFromASTFile()) | |||
1684 | return false; | |||
1685 | ||||
1686 | // A kind mismatch implies that the declaration is not replaced. | |||
1687 | if (OldD->getKind() != getKind()) | |||
1688 | return false; | |||
1689 | ||||
1690 | // For method declarations, we never replace. (Why?) | |||
1691 | if (isa<ObjCMethodDecl>(this)) | |||
1692 | return false; | |||
1693 | ||||
1694 | // For parameters, pick the newer one. This is either an error or (in | |||
1695 | // Objective-C) permitted as an extension. | |||
1696 | if (isa<ParmVarDecl>(this)) | |||
1697 | return true; | |||
1698 | ||||
1699 | // Inline namespaces can give us two declarations with the same | |||
1700 | // name and kind in the same scope but different contexts; we should | |||
1701 | // keep both declarations in this case. | |||
1702 | if (!this->getDeclContext()->getRedeclContext()->Equals( | |||
1703 | OldD->getDeclContext()->getRedeclContext())) | |||
1704 | return false; | |||
1705 | ||||
1706 | // Using declarations can be replaced if they import the same name from the | |||
1707 | // same context. | |||
1708 | if (auto *UD = dyn_cast<UsingDecl>(this)) { | |||
1709 | ASTContext &Context = getASTContext(); | |||
1710 | return Context.getCanonicalNestedNameSpecifier(UD->getQualifier()) == | |||
1711 | Context.getCanonicalNestedNameSpecifier( | |||
1712 | cast<UsingDecl>(OldD)->getQualifier()); | |||
1713 | } | |||
1714 | if (auto *UUVD = dyn_cast<UnresolvedUsingValueDecl>(this)) { | |||
1715 | ASTContext &Context = getASTContext(); | |||
1716 | return Context.getCanonicalNestedNameSpecifier(UUVD->getQualifier()) == | |||
1717 | Context.getCanonicalNestedNameSpecifier( | |||
1718 | cast<UnresolvedUsingValueDecl>(OldD)->getQualifier()); | |||
1719 | } | |||
1720 | ||||
1721 | if (isRedeclarable(getKind())) { | |||
1722 | if (getCanonicalDecl() != OldD->getCanonicalDecl()) | |||
1723 | return false; | |||
1724 | ||||
1725 | if (IsKnownNewer) | |||
1726 | return true; | |||
1727 | ||||
1728 | // Check whether this is actually newer than OldD. We want to keep the | |||
1729 | // newer declaration. This loop will usually only iterate once, because | |||
1730 | // OldD is usually the previous declaration. | |||
1731 | for (auto D : redecls()) { | |||
1732 | if (D == OldD) | |||
1733 | break; | |||
1734 | ||||
1735 | // If we reach the canonical declaration, then OldD is not actually older | |||
1736 | // than this one. | |||
1737 | // | |||
1738 | // FIXME: In this case, we should not add this decl to the lookup table. | |||
1739 | if (D->isCanonicalDecl()) | |||
1740 | return false; | |||
1741 | } | |||
1742 | ||||
1743 | // It's a newer declaration of the same kind of declaration in the same | |||
1744 | // scope: we want this decl instead of the existing one. | |||
1745 | return true; | |||
1746 | } | |||
1747 | ||||
1748 | // In all other cases, we need to keep both declarations in case they have | |||
1749 | // different visibility. Any attempt to use the name will result in an | |||
1750 | // ambiguity if more than one is visible. | |||
1751 | return false; | |||
1752 | } | |||
1753 | ||||
1754 | bool NamedDecl::hasLinkage() const { | |||
1755 | return getFormalLinkage() != NoLinkage; | |||
1756 | } | |||
1757 | ||||
1758 | NamedDecl *NamedDecl::getUnderlyingDeclImpl() { | |||
1759 | NamedDecl *ND = this; | |||
1760 | while (auto *UD = dyn_cast<UsingShadowDecl>(ND)) | |||
1761 | ND = UD->getTargetDecl(); | |||
1762 | ||||
1763 | if (auto *AD = dyn_cast<ObjCCompatibleAliasDecl>(ND)) | |||
1764 | return AD->getClassInterface(); | |||
1765 | ||||
1766 | if (auto *AD = dyn_cast<NamespaceAliasDecl>(ND)) | |||
1767 | return AD->getNamespace(); | |||
1768 | ||||
1769 | return ND; | |||
1770 | } | |||
1771 | ||||
1772 | bool NamedDecl::isCXXInstanceMember() const { | |||
1773 | if (!isCXXClassMember()) | |||
1774 | return false; | |||
1775 | ||||
1776 | const NamedDecl *D = this; | |||
1777 | if (isa<UsingShadowDecl>(D)) | |||
1778 | D = cast<UsingShadowDecl>(D)->getTargetDecl(); | |||
1779 | ||||
1780 | if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D) || isa<MSPropertyDecl>(D)) | |||
1781 | return true; | |||
1782 | if (const auto *MD = dyn_cast_or_null<CXXMethodDecl>(D->getAsFunction())) | |||
1783 | return MD->isInstance(); | |||
1784 | return false; | |||
1785 | } | |||
1786 | ||||
1787 | //===----------------------------------------------------------------------===// | |||
1788 | // DeclaratorDecl Implementation | |||
1789 | //===----------------------------------------------------------------------===// | |||
1790 | ||||
1791 | template <typename DeclT> | |||
1792 | static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) { | |||
1793 | if (decl->getNumTemplateParameterLists() > 0) | |||
1794 | return decl->getTemplateParameterList(0)->getTemplateLoc(); | |||
1795 | else | |||
1796 | return decl->getInnerLocStart(); | |||
1797 | } | |||
1798 | ||||
1799 | SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const { | |||
1800 | TypeSourceInfo *TSI = getTypeSourceInfo(); | |||
1801 | if (TSI) return TSI->getTypeLoc().getBeginLoc(); | |||
1802 | return SourceLocation(); | |||
1803 | } | |||
1804 | ||||
1805 | void DeclaratorDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) { | |||
1806 | if (QualifierLoc) { | |||
1807 | // Make sure the extended decl info is allocated. | |||
1808 | if (!hasExtInfo()) { | |||
1809 | // Save (non-extended) type source info pointer. | |||
1810 | auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); | |||
1811 | // Allocate external info struct. | |||
1812 | DeclInfo = new (getASTContext()) ExtInfo; | |||
1813 | // Restore savedTInfo into (extended) decl info. | |||
1814 | getExtInfo()->TInfo = savedTInfo; | |||
1815 | } | |||
1816 | // Set qualifier info. | |||
1817 | getExtInfo()->QualifierLoc = QualifierLoc; | |||
1818 | } else { | |||
1819 | // Here Qualifier == 0, i.e., we are removing the qualifier (if any). | |||
1820 | if (hasExtInfo()) { | |||
1821 | if (getExtInfo()->NumTemplParamLists == 0) { | |||
1822 | // Save type source info pointer. | |||
1823 | TypeSourceInfo *savedTInfo = getExtInfo()->TInfo; | |||
1824 | // Deallocate the extended decl info. | |||
1825 | getASTContext().Deallocate(getExtInfo()); | |||
1826 | // Restore savedTInfo into (non-extended) decl info. | |||
1827 | DeclInfo = savedTInfo; | |||
1828 | } | |||
1829 | else | |||
1830 | getExtInfo()->QualifierLoc = QualifierLoc; | |||
1831 | } | |||
1832 | } | |||
1833 | } | |||
1834 | ||||
1835 | void DeclaratorDecl::setTemplateParameterListsInfo( | |||
1836 | ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) { | |||
1837 | assert(!TPLists.empty())((!TPLists.empty()) ? static_cast<void> (0) : __assert_fail ("!TPLists.empty()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1837, __PRETTY_FUNCTION__)); | |||
1838 | // Make sure the extended decl info is allocated. | |||
1839 | if (!hasExtInfo()) { | |||
1840 | // Save (non-extended) type source info pointer. | |||
1841 | auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); | |||
1842 | // Allocate external info struct. | |||
1843 | DeclInfo = new (getASTContext()) ExtInfo; | |||
1844 | // Restore savedTInfo into (extended) decl info. | |||
1845 | getExtInfo()->TInfo = savedTInfo; | |||
1846 | } | |||
1847 | // Set the template parameter lists info. | |||
1848 | getExtInfo()->setTemplateParameterListsInfo(Context, TPLists); | |||
1849 | } | |||
1850 | ||||
1851 | SourceLocation DeclaratorDecl::getOuterLocStart() const { | |||
1852 | return getTemplateOrInnerLocStart(this); | |||
1853 | } | |||
1854 | ||||
1855 | // Helper function: returns true if QT is or contains a type | |||
1856 | // having a postfix component. | |||
1857 | static bool typeIsPostfix(QualType QT) { | |||
1858 | while (true) { | |||
1859 | const Type* T = QT.getTypePtr(); | |||
1860 | switch (T->getTypeClass()) { | |||
1861 | default: | |||
1862 | return false; | |||
1863 | case Type::Pointer: | |||
1864 | QT = cast<PointerType>(T)->getPointeeType(); | |||
1865 | break; | |||
1866 | case Type::BlockPointer: | |||
1867 | QT = cast<BlockPointerType>(T)->getPointeeType(); | |||
1868 | break; | |||
1869 | case Type::MemberPointer: | |||
1870 | QT = cast<MemberPointerType>(T)->getPointeeType(); | |||
1871 | break; | |||
1872 | case Type::LValueReference: | |||
1873 | case Type::RValueReference: | |||
1874 | QT = cast<ReferenceType>(T)->getPointeeType(); | |||
1875 | break; | |||
1876 | case Type::PackExpansion: | |||
1877 | QT = cast<PackExpansionType>(T)->getPattern(); | |||
1878 | break; | |||
1879 | case Type::Paren: | |||
1880 | case Type::ConstantArray: | |||
1881 | case Type::DependentSizedArray: | |||
1882 | case Type::IncompleteArray: | |||
1883 | case Type::VariableArray: | |||
1884 | case Type::FunctionProto: | |||
1885 | case Type::FunctionNoProto: | |||
1886 | return true; | |||
1887 | } | |||
1888 | } | |||
1889 | } | |||
1890 | ||||
1891 | SourceRange DeclaratorDecl::getSourceRange() const { | |||
1892 | SourceLocation RangeEnd = getLocation(); | |||
1893 | if (TypeSourceInfo *TInfo = getTypeSourceInfo()) { | |||
1894 | // If the declaration has no name or the type extends past the name take the | |||
1895 | // end location of the type. | |||
1896 | if (!getDeclName() || typeIsPostfix(TInfo->getType())) | |||
1897 | RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); | |||
1898 | } | |||
1899 | return SourceRange(getOuterLocStart(), RangeEnd); | |||
1900 | } | |||
1901 | ||||
1902 | void QualifierInfo::setTemplateParameterListsInfo( | |||
1903 | ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) { | |||
1904 | // Free previous template parameters (if any). | |||
1905 | if (NumTemplParamLists > 0) { | |||
1906 | Context.Deallocate(TemplParamLists); | |||
1907 | TemplParamLists = nullptr; | |||
1908 | NumTemplParamLists = 0; | |||
1909 | } | |||
1910 | // Set info on matched template parameter lists (if any). | |||
1911 | if (!TPLists.empty()) { | |||
1912 | TemplParamLists = new (Context) TemplateParameterList *[TPLists.size()]; | |||
1913 | NumTemplParamLists = TPLists.size(); | |||
1914 | std::copy(TPLists.begin(), TPLists.end(), TemplParamLists); | |||
1915 | } | |||
1916 | } | |||
1917 | ||||
1918 | //===----------------------------------------------------------------------===// | |||
1919 | // VarDecl Implementation | |||
1920 | //===----------------------------------------------------------------------===// | |||
1921 | ||||
1922 | const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) { | |||
1923 | switch (SC) { | |||
1924 | case SC_None: break; | |||
1925 | case SC_Auto: return "auto"; | |||
1926 | case SC_Extern: return "extern"; | |||
1927 | case SC_PrivateExtern: return "__private_extern__"; | |||
1928 | case SC_Register: return "register"; | |||
1929 | case SC_Static: return "static"; | |||
1930 | } | |||
1931 | ||||
1932 | llvm_unreachable("Invalid storage class")::llvm::llvm_unreachable_internal("Invalid storage class", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1932); | |||
1933 | } | |||
1934 | ||||
1935 | VarDecl::VarDecl(Kind DK, ASTContext &C, DeclContext *DC, | |||
1936 | SourceLocation StartLoc, SourceLocation IdLoc, | |||
1937 | IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, | |||
1938 | StorageClass SC) | |||
1939 | : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc), | |||
1940 | redeclarable_base(C) { | |||
1941 | static_assert(sizeof(VarDeclBitfields) <= sizeof(unsigned), | |||
1942 | "VarDeclBitfields too large!"); | |||
1943 | static_assert(sizeof(ParmVarDeclBitfields) <= sizeof(unsigned), | |||
1944 | "ParmVarDeclBitfields too large!"); | |||
1945 | static_assert(sizeof(NonParmVarDeclBitfields) <= sizeof(unsigned), | |||
1946 | "NonParmVarDeclBitfields too large!"); | |||
1947 | AllBits = 0; | |||
1948 | VarDeclBits.SClass = SC; | |||
1949 | // Everything else is implicitly initialized to false. | |||
1950 | } | |||
1951 | ||||
1952 | VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC, | |||
1953 | SourceLocation StartL, SourceLocation IdL, | |||
1954 | IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, | |||
1955 | StorageClass S) { | |||
1956 | return new (C, DC) VarDecl(Var, C, DC, StartL, IdL, Id, T, TInfo, S); | |||
1957 | } | |||
1958 | ||||
1959 | VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
1960 | return new (C, ID) | |||
1961 | VarDecl(Var, C, nullptr, SourceLocation(), SourceLocation(), nullptr, | |||
1962 | QualType(), nullptr, SC_None); | |||
1963 | } | |||
1964 | ||||
1965 | void VarDecl::setStorageClass(StorageClass SC) { | |||
1966 | assert(isLegalForVariable(SC))((isLegalForVariable(SC)) ? static_cast<void> (0) : __assert_fail ("isLegalForVariable(SC)", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1966, __PRETTY_FUNCTION__)); | |||
1967 | VarDeclBits.SClass = SC; | |||
1968 | } | |||
1969 | ||||
1970 | VarDecl::TLSKind VarDecl::getTLSKind() const { | |||
1971 | switch (VarDeclBits.TSCSpec) { | |||
1972 | case TSCS_unspecified: | |||
1973 | if (!hasAttr<ThreadAttr>() && | |||
1974 | !(getASTContext().getLangOpts().OpenMPUseTLS && | |||
1975 | getASTContext().getTargetInfo().isTLSSupported() && | |||
1976 | hasAttr<OMPThreadPrivateDeclAttr>())) | |||
1977 | return TLS_None; | |||
1978 | return ((getASTContext().getLangOpts().isCompatibleWithMSVC( | |||
1979 | LangOptions::MSVC2015)) || | |||
1980 | hasAttr<OMPThreadPrivateDeclAttr>()) | |||
1981 | ? TLS_Dynamic | |||
1982 | : TLS_Static; | |||
1983 | case TSCS___thread: // Fall through. | |||
1984 | case TSCS__Thread_local: | |||
1985 | return TLS_Static; | |||
1986 | case TSCS_thread_local: | |||
1987 | return TLS_Dynamic; | |||
1988 | } | |||
1989 | llvm_unreachable("Unknown thread storage class specifier!")::llvm::llvm_unreachable_internal("Unknown thread storage class specifier!" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 1989); | |||
1990 | } | |||
1991 | ||||
1992 | SourceRange VarDecl::getSourceRange() const { | |||
1993 | if (const Expr *Init = getInit()) { | |||
1994 | SourceLocation InitEnd = Init->getEndLoc(); | |||
1995 | // If Init is implicit, ignore its source range and fallback on | |||
1996 | // DeclaratorDecl::getSourceRange() to handle postfix elements. | |||
1997 | if (InitEnd.isValid() && InitEnd != getLocation()) | |||
1998 | return SourceRange(getOuterLocStart(), InitEnd); | |||
1999 | } | |||
2000 | return DeclaratorDecl::getSourceRange(); | |||
2001 | } | |||
2002 | ||||
2003 | template<typename T> | |||
2004 | static LanguageLinkage getDeclLanguageLinkage(const T &D) { | |||
2005 | // C++ [dcl.link]p1: All function types, function names with external linkage, | |||
2006 | // and variable names with external linkage have a language linkage. | |||
2007 | if (!D.hasExternalFormalLinkage()) | |||
2008 | return NoLanguageLinkage; | |||
2009 | ||||
2010 | // Language linkage is a C++ concept, but saying that everything else in C has | |||
2011 | // C language linkage fits the implementation nicely. | |||
2012 | ASTContext &Context = D.getASTContext(); | |||
2013 | if (!Context.getLangOpts().CPlusPlus) | |||
2014 | return CLanguageLinkage; | |||
2015 | ||||
2016 | // C++ [dcl.link]p4: A C language linkage is ignored in determining the | |||
2017 | // language linkage of the names of class members and the function type of | |||
2018 | // class member functions. | |||
2019 | const DeclContext *DC = D.getDeclContext(); | |||
2020 | if (DC->isRecord()) | |||
2021 | return CXXLanguageLinkage; | |||
2022 | ||||
2023 | // If the first decl is in an extern "C" context, any other redeclaration | |||
2024 | // will have C language linkage. If the first one is not in an extern "C" | |||
2025 | // context, we would have reported an error for any other decl being in one. | |||
2026 | if (isFirstInExternCContext(&D)) | |||
2027 | return CLanguageLinkage; | |||
2028 | return CXXLanguageLinkage; | |||
2029 | } | |||
2030 | ||||
2031 | template<typename T> | |||
2032 | static bool isDeclExternC(const T &D) { | |||
2033 | // Since the context is ignored for class members, they can only have C++ | |||
2034 | // language linkage or no language linkage. | |||
2035 | const DeclContext *DC = D.getDeclContext(); | |||
2036 | if (DC->isRecord()) { | |||
2037 | assert(D.getASTContext().getLangOpts().CPlusPlus)((D.getASTContext().getLangOpts().CPlusPlus) ? static_cast< void> (0) : __assert_fail ("D.getASTContext().getLangOpts().CPlusPlus" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2037, __PRETTY_FUNCTION__)); | |||
2038 | return false; | |||
2039 | } | |||
2040 | ||||
2041 | return D.getLanguageLinkage() == CLanguageLinkage; | |||
2042 | } | |||
2043 | ||||
2044 | LanguageLinkage VarDecl::getLanguageLinkage() const { | |||
2045 | return getDeclLanguageLinkage(*this); | |||
2046 | } | |||
2047 | ||||
2048 | bool VarDecl::isExternC() const { | |||
2049 | return isDeclExternC(*this); | |||
2050 | } | |||
2051 | ||||
2052 | bool VarDecl::isInExternCContext() const { | |||
2053 | return getLexicalDeclContext()->isExternCContext(); | |||
2054 | } | |||
2055 | ||||
2056 | bool VarDecl::isInExternCXXContext() const { | |||
2057 | return getLexicalDeclContext()->isExternCXXContext(); | |||
2058 | } | |||
2059 | ||||
2060 | VarDecl *VarDecl::getCanonicalDecl() { return getFirstDecl(); } | |||
2061 | ||||
2062 | VarDecl::DefinitionKind | |||
2063 | VarDecl::isThisDeclarationADefinition(ASTContext &C) const { | |||
2064 | if (isThisDeclarationADemotedDefinition()) | |||
2065 | return DeclarationOnly; | |||
2066 | ||||
2067 | // C++ [basic.def]p2: | |||
2068 | // A declaration is a definition unless [...] it contains the 'extern' | |||
2069 | // specifier or a linkage-specification and neither an initializer [...], | |||
2070 | // it declares a non-inline static data member in a class declaration [...], | |||
2071 | // it declares a static data member outside a class definition and the variable | |||
2072 | // was defined within the class with the constexpr specifier [...], | |||
2073 | // C++1y [temp.expl.spec]p15: | |||
2074 | // An explicit specialization of a static data member or an explicit | |||
2075 | // specialization of a static data member template is a definition if the | |||
2076 | // declaration includes an initializer; otherwise, it is a declaration. | |||
2077 | // | |||
2078 | // FIXME: How do you declare (but not define) a partial specialization of | |||
2079 | // a static data member template outside the containing class? | |||
2080 | if (isStaticDataMember()) { | |||
2081 | if (isOutOfLine() && | |||
2082 | !(getCanonicalDecl()->isInline() && | |||
2083 | getCanonicalDecl()->isConstexpr()) && | |||
2084 | (hasInit() || | |||
2085 | // If the first declaration is out-of-line, this may be an | |||
2086 | // instantiation of an out-of-line partial specialization of a variable | |||
2087 | // template for which we have not yet instantiated the initializer. | |||
2088 | (getFirstDecl()->isOutOfLine() | |||
2089 | ? getTemplateSpecializationKind() == TSK_Undeclared | |||
2090 | : getTemplateSpecializationKind() != | |||
2091 | TSK_ExplicitSpecialization) || | |||
2092 | isa<VarTemplatePartialSpecializationDecl>(this))) | |||
2093 | return Definition; | |||
2094 | else if (!isOutOfLine() && isInline()) | |||
2095 | return Definition; | |||
2096 | else | |||
2097 | return DeclarationOnly; | |||
2098 | } | |||
2099 | // C99 6.7p5: | |||
2100 | // A definition of an identifier is a declaration for that identifier that | |||
2101 | // [...] causes storage to be reserved for that object. | |||
2102 | // Note: that applies for all non-file-scope objects. | |||
2103 | // C99 6.9.2p1: | |||
2104 | // If the declaration of an identifier for an object has file scope and an | |||
2105 | // initializer, the declaration is an external definition for the identifier | |||
2106 | if (hasInit()) | |||
2107 | return Definition; | |||
2108 | ||||
2109 | if (hasDefiningAttr()) | |||
2110 | return Definition; | |||
2111 | ||||
2112 | if (const auto *SAA = getAttr<SelectAnyAttr>()) | |||
2113 | if (!SAA->isInherited()) | |||
2114 | return Definition; | |||
2115 | ||||
2116 | // A variable template specialization (other than a static data member | |||
2117 | // template or an explicit specialization) is a declaration until we | |||
2118 | // instantiate its initializer. | |||
2119 | if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(this)) { | |||
2120 | if (VTSD->getTemplateSpecializationKind() != TSK_ExplicitSpecialization && | |||
2121 | !isa<VarTemplatePartialSpecializationDecl>(VTSD) && | |||
2122 | !VTSD->IsCompleteDefinition) | |||
2123 | return DeclarationOnly; | |||
2124 | } | |||
2125 | ||||
2126 | if (hasExternalStorage()) | |||
2127 | return DeclarationOnly; | |||
2128 | ||||
2129 | // [dcl.link] p7: | |||
2130 | // A declaration directly contained in a linkage-specification is treated | |||
2131 | // as if it contains the extern specifier for the purpose of determining | |||
2132 | // the linkage of the declared name and whether it is a definition. | |||
2133 | if (isSingleLineLanguageLinkage(*this)) | |||
2134 | return DeclarationOnly; | |||
2135 | ||||
2136 | // C99 6.9.2p2: | |||
2137 | // A declaration of an object that has file scope without an initializer, | |||
2138 | // and without a storage class specifier or the scs 'static', constitutes | |||
2139 | // a tentative definition. | |||
2140 | // No such thing in C++. | |||
2141 | if (!C.getLangOpts().CPlusPlus && isFileVarDecl()) | |||
2142 | return TentativeDefinition; | |||
2143 | ||||
2144 | // What's left is (in C, block-scope) declarations without initializers or | |||
2145 | // external storage. These are definitions. | |||
2146 | return Definition; | |||
2147 | } | |||
2148 | ||||
2149 | VarDecl *VarDecl::getActingDefinition() { | |||
2150 | DefinitionKind Kind = isThisDeclarationADefinition(); | |||
2151 | if (Kind != TentativeDefinition) | |||
2152 | return nullptr; | |||
2153 | ||||
2154 | VarDecl *LastTentative = nullptr; | |||
2155 | VarDecl *First = getFirstDecl(); | |||
2156 | for (auto I : First->redecls()) { | |||
2157 | Kind = I->isThisDeclarationADefinition(); | |||
2158 | if (Kind == Definition) | |||
2159 | return nullptr; | |||
2160 | else if (Kind == TentativeDefinition) | |||
2161 | LastTentative = I; | |||
2162 | } | |||
2163 | return LastTentative; | |||
2164 | } | |||
2165 | ||||
2166 | VarDecl *VarDecl::getDefinition(ASTContext &C) { | |||
2167 | VarDecl *First = getFirstDecl(); | |||
2168 | for (auto I : First->redecls()) { | |||
2169 | if (I->isThisDeclarationADefinition(C) == Definition) | |||
2170 | return I; | |||
2171 | } | |||
2172 | return nullptr; | |||
2173 | } | |||
2174 | ||||
2175 | VarDecl::DefinitionKind VarDecl::hasDefinition(ASTContext &C) const { | |||
2176 | DefinitionKind Kind = DeclarationOnly; | |||
2177 | ||||
2178 | const VarDecl *First = getFirstDecl(); | |||
2179 | for (auto I : First->redecls()) { | |||
2180 | Kind = std::max(Kind, I->isThisDeclarationADefinition(C)); | |||
2181 | if (Kind == Definition) | |||
2182 | break; | |||
2183 | } | |||
2184 | ||||
2185 | return Kind; | |||
2186 | } | |||
2187 | ||||
2188 | const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const { | |||
2189 | for (auto I : redecls()) { | |||
2190 | if (auto Expr = I->getInit()) { | |||
2191 | D = I; | |||
2192 | return Expr; | |||
2193 | } | |||
2194 | } | |||
2195 | return nullptr; | |||
2196 | } | |||
2197 | ||||
2198 | bool VarDecl::hasInit() const { | |||
2199 | if (auto *P = dyn_cast<ParmVarDecl>(this)) | |||
2200 | if (P->hasUnparsedDefaultArg() || P->hasUninstantiatedDefaultArg()) | |||
2201 | return false; | |||
2202 | ||||
2203 | return !Init.isNull(); | |||
2204 | } | |||
2205 | ||||
2206 | Expr *VarDecl::getInit() { | |||
2207 | if (!hasInit()) | |||
2208 | return nullptr; | |||
2209 | ||||
2210 | if (auto *S = Init.dyn_cast<Stmt *>()) | |||
2211 | return cast<Expr>(S); | |||
2212 | ||||
2213 | return cast_or_null<Expr>(Init.get<EvaluatedStmt *>()->Value); | |||
2214 | } | |||
2215 | ||||
2216 | Stmt **VarDecl::getInitAddress() { | |||
2217 | if (auto *ES = Init.dyn_cast<EvaluatedStmt *>()) | |||
2218 | return &ES->Value; | |||
2219 | ||||
2220 | return Init.getAddrOfPtr1(); | |||
2221 | } | |||
2222 | ||||
2223 | bool VarDecl::isOutOfLine() const { | |||
2224 | if (Decl::isOutOfLine()) | |||
2225 | return true; | |||
2226 | ||||
2227 | if (!isStaticDataMember()) | |||
2228 | return false; | |||
2229 | ||||
2230 | // If this static data member was instantiated from a static data member of | |||
2231 | // a class template, check whether that static data member was defined | |||
2232 | // out-of-line. | |||
2233 | if (VarDecl *VD = getInstantiatedFromStaticDataMember()) | |||
2234 | return VD->isOutOfLine(); | |||
2235 | ||||
2236 | return false; | |||
2237 | } | |||
2238 | ||||
2239 | void VarDecl::setInit(Expr *I) { | |||
2240 | if (auto *Eval = Init.dyn_cast<EvaluatedStmt *>()) { | |||
2241 | Eval->~EvaluatedStmt(); | |||
2242 | getASTContext().Deallocate(Eval); | |||
2243 | } | |||
2244 | ||||
2245 | Init = I; | |||
2246 | } | |||
2247 | ||||
2248 | bool VarDecl::isUsableInConstantExpressions(ASTContext &C) const { | |||
2249 | const LangOptions &Lang = C.getLangOpts(); | |||
2250 | ||||
2251 | if (!Lang.CPlusPlus) | |||
2252 | return false; | |||
2253 | ||||
2254 | // In C++11, any variable of reference type can be used in a constant | |||
2255 | // expression if it is initialized by a constant expression. | |||
2256 | if (Lang.CPlusPlus11 && getType()->isReferenceType()) | |||
2257 | return true; | |||
2258 | ||||
2259 | // Only const objects can be used in constant expressions in C++. C++98 does | |||
2260 | // not require the variable to be non-volatile, but we consider this to be a | |||
2261 | // defect. | |||
2262 | if (!getType().isConstQualified() || getType().isVolatileQualified()) | |||
2263 | return false; | |||
2264 | ||||
2265 | // In C++, const, non-volatile variables of integral or enumeration types | |||
2266 | // can be used in constant expressions. | |||
2267 | if (getType()->isIntegralOrEnumerationType()) | |||
2268 | return true; | |||
2269 | ||||
2270 | // Additionally, in C++11, non-volatile constexpr variables can be used in | |||
2271 | // constant expressions. | |||
2272 | return Lang.CPlusPlus11 && isConstexpr(); | |||
2273 | } | |||
2274 | ||||
2275 | /// Convert the initializer for this declaration to the elaborated EvaluatedStmt | |||
2276 | /// form, which contains extra information on the evaluated value of the | |||
2277 | /// initializer. | |||
2278 | EvaluatedStmt *VarDecl::ensureEvaluatedStmt() const { | |||
2279 | auto *Eval = Init.dyn_cast<EvaluatedStmt *>(); | |||
2280 | if (!Eval) { | |||
2281 | // Note: EvaluatedStmt contains an APValue, which usually holds | |||
2282 | // resources not allocated from the ASTContext. We need to do some | |||
2283 | // work to avoid leaking those, but we do so in VarDecl::evaluateValue | |||
2284 | // where we can detect whether there's anything to clean up or not. | |||
2285 | Eval = new (getASTContext()) EvaluatedStmt; | |||
2286 | Eval->Value = Init.get<Stmt *>(); | |||
2287 | Init = Eval; | |||
2288 | } | |||
2289 | return Eval; | |||
2290 | } | |||
2291 | ||||
2292 | APValue *VarDecl::evaluateValue() const { | |||
2293 | SmallVector<PartialDiagnosticAt, 8> Notes; | |||
2294 | return evaluateValue(Notes); | |||
2295 | } | |||
2296 | ||||
2297 | APValue *VarDecl::evaluateValue( | |||
2298 | SmallVectorImpl<PartialDiagnosticAt> &Notes) const { | |||
2299 | EvaluatedStmt *Eval = ensureEvaluatedStmt(); | |||
2300 | ||||
2301 | // We only produce notes indicating why an initializer is non-constant the | |||
2302 | // first time it is evaluated. FIXME: The notes won't always be emitted the | |||
2303 | // first time we try evaluation, so might not be produced at all. | |||
2304 | if (Eval->WasEvaluated) | |||
2305 | return Eval->Evaluated.isAbsent() ? nullptr : &Eval->Evaluated; | |||
2306 | ||||
2307 | const auto *Init = cast<Expr>(Eval->Value); | |||
2308 | assert(!Init->isValueDependent())((!Init->isValueDependent()) ? static_cast<void> (0) : __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2308, __PRETTY_FUNCTION__)); | |||
2309 | ||||
2310 | if (Eval->IsEvaluating) { | |||
2311 | // FIXME: Produce a diagnostic for self-initialization. | |||
2312 | Eval->CheckedICE = true; | |||
2313 | Eval->IsICE = false; | |||
2314 | return nullptr; | |||
2315 | } | |||
2316 | ||||
2317 | Eval->IsEvaluating = true; | |||
2318 | ||||
2319 | bool Result = Init->EvaluateAsInitializer(Eval->Evaluated, getASTContext(), | |||
2320 | this, Notes); | |||
2321 | ||||
2322 | // Ensure the computed APValue is cleaned up later if evaluation succeeded, | |||
2323 | // or that it's empty (so that there's nothing to clean up) if evaluation | |||
2324 | // failed. | |||
2325 | if (!Result) | |||
2326 | Eval->Evaluated = APValue(); | |||
2327 | else if (Eval->Evaluated.needsCleanup()) | |||
2328 | getASTContext().addDestruction(&Eval->Evaluated); | |||
2329 | ||||
2330 | Eval->IsEvaluating = false; | |||
2331 | Eval->WasEvaluated = true; | |||
2332 | ||||
2333 | // In C++11, we have determined whether the initializer was a constant | |||
2334 | // expression as a side-effect. | |||
2335 | if (getASTContext().getLangOpts().CPlusPlus11 && !Eval->CheckedICE) { | |||
2336 | Eval->CheckedICE = true; | |||
2337 | Eval->IsICE = Result && Notes.empty(); | |||
2338 | } | |||
2339 | ||||
2340 | return Result ? &Eval->Evaluated : nullptr; | |||
2341 | } | |||
2342 | ||||
2343 | APValue *VarDecl::getEvaluatedValue() const { | |||
2344 | if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) | |||
2345 | if (Eval->WasEvaluated) | |||
2346 | return &Eval->Evaluated; | |||
2347 | ||||
2348 | return nullptr; | |||
2349 | } | |||
2350 | ||||
2351 | bool VarDecl::isInitKnownICE() const { | |||
2352 | if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) | |||
2353 | return Eval->CheckedICE; | |||
2354 | ||||
2355 | return false; | |||
2356 | } | |||
2357 | ||||
2358 | bool VarDecl::isInitICE() const { | |||
2359 | assert(isInitKnownICE() &&((isInitKnownICE() && "Check whether we already know that the initializer is an ICE" ) ? static_cast<void> (0) : __assert_fail ("isInitKnownICE() && \"Check whether we already know that the initializer is an ICE\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2360, __PRETTY_FUNCTION__)) | |||
2360 | "Check whether we already know that the initializer is an ICE")((isInitKnownICE() && "Check whether we already know that the initializer is an ICE" ) ? static_cast<void> (0) : __assert_fail ("isInitKnownICE() && \"Check whether we already know that the initializer is an ICE\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2360, __PRETTY_FUNCTION__)); | |||
2361 | return Init.get<EvaluatedStmt *>()->IsICE; | |||
2362 | } | |||
2363 | ||||
2364 | bool VarDecl::checkInitIsICE() const { | |||
2365 | // Initializers of weak variables are never ICEs. | |||
2366 | if (isWeak()) | |||
2367 | return false; | |||
2368 | ||||
2369 | EvaluatedStmt *Eval = ensureEvaluatedStmt(); | |||
2370 | if (Eval->CheckedICE) | |||
2371 | // We have already checked whether this subexpression is an | |||
2372 | // integral constant expression. | |||
2373 | return Eval->IsICE; | |||
2374 | ||||
2375 | const auto *Init = cast<Expr>(Eval->Value); | |||
2376 | assert(!Init->isValueDependent())((!Init->isValueDependent()) ? static_cast<void> (0) : __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2376, __PRETTY_FUNCTION__)); | |||
2377 | ||||
2378 | // In C++11, evaluate the initializer to check whether it's a constant | |||
2379 | // expression. | |||
2380 | if (getASTContext().getLangOpts().CPlusPlus11) { | |||
2381 | SmallVector<PartialDiagnosticAt, 8> Notes; | |||
2382 | evaluateValue(Notes); | |||
2383 | return Eval->IsICE; | |||
2384 | } | |||
2385 | ||||
2386 | // It's an ICE whether or not the definition we found is | |||
2387 | // out-of-line. See DR 721 and the discussion in Clang PR | |||
2388 | // 6206 for details. | |||
2389 | ||||
2390 | if (Eval->CheckingICE) | |||
2391 | return false; | |||
2392 | Eval->CheckingICE = true; | |||
2393 | ||||
2394 | Eval->IsICE = Init->isIntegerConstantExpr(getASTContext()); | |||
2395 | Eval->CheckingICE = false; | |||
2396 | Eval->CheckedICE = true; | |||
2397 | return Eval->IsICE; | |||
2398 | } | |||
2399 | ||||
2400 | bool VarDecl::isParameterPack() const { | |||
2401 | return isa<PackExpansionType>(getType()); | |||
2402 | } | |||
2403 | ||||
2404 | template<typename DeclT> | |||
2405 | static DeclT *getDefinitionOrSelf(DeclT *D) { | |||
2406 | assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2406, __PRETTY_FUNCTION__)); | |||
2407 | if (auto *Def = D->getDefinition()) | |||
2408 | return Def; | |||
2409 | return D; | |||
2410 | } | |||
2411 | ||||
2412 | bool VarDecl::isEscapingByref() const { | |||
2413 | return hasAttr<BlocksAttr>() && NonParmVarDeclBits.EscapingByref; | |||
2414 | } | |||
2415 | ||||
2416 | bool VarDecl::isNonEscapingByref() const { | |||
2417 | return hasAttr<BlocksAttr>() && !NonParmVarDeclBits.EscapingByref; | |||
2418 | } | |||
2419 | ||||
2420 | VarDecl *VarDecl::getTemplateInstantiationPattern() const { | |||
2421 | const VarDecl *VD = this; | |||
2422 | ||||
2423 | // If this is an instantiated member, walk back to the template from which | |||
2424 | // it was instantiated. | |||
2425 | if (MemberSpecializationInfo *MSInfo = VD->getMemberSpecializationInfo()) { | |||
2426 | if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) { | |||
2427 | VD = VD->getInstantiatedFromStaticDataMember(); | |||
2428 | while (auto *NewVD = VD->getInstantiatedFromStaticDataMember()) | |||
2429 | VD = NewVD; | |||
2430 | } | |||
2431 | } | |||
2432 | ||||
2433 | // If it's an instantiated variable template specialization, find the | |||
2434 | // template or partial specialization from which it was instantiated. | |||
2435 | if (auto *VDTemplSpec = dyn_cast<VarTemplateSpecializationDecl>(VD)) { | |||
2436 | if (isTemplateInstantiation(VDTemplSpec->getTemplateSpecializationKind())) { | |||
2437 | auto From = VDTemplSpec->getInstantiatedFrom(); | |||
2438 | if (auto *VTD = From.dyn_cast<VarTemplateDecl *>()) { | |||
2439 | while (!VTD->isMemberSpecialization()) { | |||
2440 | auto *NewVTD = VTD->getInstantiatedFromMemberTemplate(); | |||
2441 | if (!NewVTD) | |||
2442 | break; | |||
2443 | VTD = NewVTD; | |||
2444 | } | |||
2445 | return getDefinitionOrSelf(VTD->getTemplatedDecl()); | |||
2446 | } | |||
2447 | if (auto *VTPSD = | |||
2448 | From.dyn_cast<VarTemplatePartialSpecializationDecl *>()) { | |||
2449 | while (!VTPSD->isMemberSpecialization()) { | |||
2450 | auto *NewVTPSD = VTPSD->getInstantiatedFromMember(); | |||
2451 | if (!NewVTPSD) | |||
2452 | break; | |||
2453 | VTPSD = NewVTPSD; | |||
2454 | } | |||
2455 | return getDefinitionOrSelf<VarDecl>(VTPSD); | |||
2456 | } | |||
2457 | } | |||
2458 | } | |||
2459 | ||||
2460 | // If this is the pattern of a variable template, find where it was | |||
2461 | // instantiated from. FIXME: Is this necessary? | |||
2462 | if (VarTemplateDecl *VarTemplate = VD->getDescribedVarTemplate()) { | |||
2463 | while (!VarTemplate->isMemberSpecialization()) { | |||
2464 | auto *NewVT = VarTemplate->getInstantiatedFromMemberTemplate(); | |||
2465 | if (!NewVT) | |||
2466 | break; | |||
2467 | VarTemplate = NewVT; | |||
2468 | } | |||
2469 | ||||
2470 | return getDefinitionOrSelf(VarTemplate->getTemplatedDecl()); | |||
2471 | } | |||
2472 | ||||
2473 | if (VD == this) | |||
2474 | return nullptr; | |||
2475 | return getDefinitionOrSelf(const_cast<VarDecl*>(VD)); | |||
2476 | } | |||
2477 | ||||
2478 | VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const { | |||
2479 | if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) | |||
2480 | return cast<VarDecl>(MSI->getInstantiatedFrom()); | |||
2481 | ||||
2482 | return nullptr; | |||
2483 | } | |||
2484 | ||||
2485 | TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const { | |||
2486 | if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this)) | |||
2487 | return Spec->getSpecializationKind(); | |||
2488 | ||||
2489 | if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) | |||
2490 | return MSI->getTemplateSpecializationKind(); | |||
2491 | ||||
2492 | return TSK_Undeclared; | |||
2493 | } | |||
2494 | ||||
2495 | TemplateSpecializationKind | |||
2496 | VarDecl::getTemplateSpecializationKindForInstantiation() const { | |||
2497 | if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) | |||
2498 | return MSI->getTemplateSpecializationKind(); | |||
2499 | ||||
2500 | if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this)) | |||
2501 | return Spec->getSpecializationKind(); | |||
2502 | ||||
2503 | return TSK_Undeclared; | |||
2504 | } | |||
2505 | ||||
2506 | SourceLocation VarDecl::getPointOfInstantiation() const { | |||
2507 | if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this)) | |||
2508 | return Spec->getPointOfInstantiation(); | |||
2509 | ||||
2510 | if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) | |||
2511 | return MSI->getPointOfInstantiation(); | |||
2512 | ||||
2513 | return SourceLocation(); | |||
2514 | } | |||
2515 | ||||
2516 | VarTemplateDecl *VarDecl::getDescribedVarTemplate() const { | |||
2517 | return getASTContext().getTemplateOrSpecializationInfo(this) | |||
2518 | .dyn_cast<VarTemplateDecl *>(); | |||
2519 | } | |||
2520 | ||||
2521 | void VarDecl::setDescribedVarTemplate(VarTemplateDecl *Template) { | |||
2522 | getASTContext().setTemplateOrSpecializationInfo(this, Template); | |||
2523 | } | |||
2524 | ||||
2525 | bool VarDecl::isKnownToBeDefined() const { | |||
2526 | const auto &LangOpts = getASTContext().getLangOpts(); | |||
2527 | // In CUDA mode without relocatable device code, variables of form 'extern | |||
2528 | // __shared__ Foo foo[]' are pointers to the base of the GPU core's shared | |||
2529 | // memory pool. These are never undefined variables, even if they appear | |||
2530 | // inside of an anon namespace or static function. | |||
2531 | // | |||
2532 | // With CUDA relocatable device code enabled, these variables don't get | |||
2533 | // special handling; they're treated like regular extern variables. | |||
2534 | if (LangOpts.CUDA && !LangOpts.GPURelocatableDeviceCode && | |||
2535 | hasExternalStorage() && hasAttr<CUDASharedAttr>() && | |||
2536 | isa<IncompleteArrayType>(getType())) | |||
2537 | return true; | |||
2538 | ||||
2539 | return hasDefinition(); | |||
2540 | } | |||
2541 | ||||
2542 | bool VarDecl::isNoDestroy(const ASTContext &Ctx) const { | |||
2543 | return hasGlobalStorage() && (hasAttr<NoDestroyAttr>() || | |||
2544 | (!Ctx.getLangOpts().RegisterStaticDestructors && | |||
2545 | !hasAttr<AlwaysDestroyAttr>())); | |||
2546 | } | |||
2547 | ||||
2548 | MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const { | |||
2549 | if (isStaticDataMember()) | |||
2550 | // FIXME: Remove ? | |||
2551 | // return getASTContext().getInstantiatedFromStaticDataMember(this); | |||
2552 | return getASTContext().getTemplateOrSpecializationInfo(this) | |||
2553 | .dyn_cast<MemberSpecializationInfo *>(); | |||
2554 | return nullptr; | |||
2555 | } | |||
2556 | ||||
2557 | void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, | |||
2558 | SourceLocation PointOfInstantiation) { | |||
2559 | assert((isa<VarTemplateSpecializationDecl>(this) ||(((isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo ()) && "not a variable or static data member template specialization" ) ? static_cast<void> (0) : __assert_fail ("(isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo()) && \"not a variable or static data member template specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2561, __PRETTY_FUNCTION__)) | |||
2560 | getMemberSpecializationInfo()) &&(((isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo ()) && "not a variable or static data member template specialization" ) ? static_cast<void> (0) : __assert_fail ("(isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo()) && \"not a variable or static data member template specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2561, __PRETTY_FUNCTION__)) | |||
2561 | "not a variable or static data member template specialization")(((isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo ()) && "not a variable or static data member template specialization" ) ? static_cast<void> (0) : __assert_fail ("(isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo()) && \"not a variable or static data member template specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2561, __PRETTY_FUNCTION__)); | |||
2562 | ||||
2563 | if (VarTemplateSpecializationDecl *Spec = | |||
2564 | dyn_cast<VarTemplateSpecializationDecl>(this)) { | |||
2565 | Spec->setSpecializationKind(TSK); | |||
2566 | if (TSK != TSK_ExplicitSpecialization && | |||
2567 | PointOfInstantiation.isValid() && | |||
2568 | Spec->getPointOfInstantiation().isInvalid()) { | |||
2569 | Spec->setPointOfInstantiation(PointOfInstantiation); | |||
2570 | if (ASTMutationListener *L = getASTContext().getASTMutationListener()) | |||
2571 | L->InstantiationRequested(this); | |||
2572 | } | |||
2573 | } else if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) { | |||
2574 | MSI->setTemplateSpecializationKind(TSK); | |||
2575 | if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() && | |||
2576 | MSI->getPointOfInstantiation().isInvalid()) { | |||
2577 | MSI->setPointOfInstantiation(PointOfInstantiation); | |||
2578 | if (ASTMutationListener *L = getASTContext().getASTMutationListener()) | |||
2579 | L->InstantiationRequested(this); | |||
2580 | } | |||
2581 | } | |||
2582 | } | |||
2583 | ||||
2584 | void | |||
2585 | VarDecl::setInstantiationOfStaticDataMember(VarDecl *VD, | |||
2586 | TemplateSpecializationKind TSK) { | |||
2587 | assert(getASTContext().getTemplateOrSpecializationInfo(this).isNull() &&((getASTContext().getTemplateOrSpecializationInfo(this).isNull () && "Previous template or instantiation?") ? static_cast <void> (0) : __assert_fail ("getASTContext().getTemplateOrSpecializationInfo(this).isNull() && \"Previous template or instantiation?\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2588, __PRETTY_FUNCTION__)) | |||
2588 | "Previous template or instantiation?")((getASTContext().getTemplateOrSpecializationInfo(this).isNull () && "Previous template or instantiation?") ? static_cast <void> (0) : __assert_fail ("getASTContext().getTemplateOrSpecializationInfo(this).isNull() && \"Previous template or instantiation?\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2588, __PRETTY_FUNCTION__)); | |||
2589 | getASTContext().setInstantiatedFromStaticDataMember(this, VD, TSK); | |||
2590 | } | |||
2591 | ||||
2592 | //===----------------------------------------------------------------------===// | |||
2593 | // ParmVarDecl Implementation | |||
2594 | //===----------------------------------------------------------------------===// | |||
2595 | ||||
2596 | ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC, | |||
2597 | SourceLocation StartLoc, | |||
2598 | SourceLocation IdLoc, IdentifierInfo *Id, | |||
2599 | QualType T, TypeSourceInfo *TInfo, | |||
2600 | StorageClass S, Expr *DefArg) { | |||
2601 | return new (C, DC) ParmVarDecl(ParmVar, C, DC, StartLoc, IdLoc, Id, T, TInfo, | |||
2602 | S, DefArg); | |||
2603 | } | |||
2604 | ||||
2605 | QualType ParmVarDecl::getOriginalType() const { | |||
2606 | TypeSourceInfo *TSI = getTypeSourceInfo(); | |||
2607 | QualType T = TSI ? TSI->getType() : getType(); | |||
2608 | if (const auto *DT = dyn_cast<DecayedType>(T)) | |||
2609 | return DT->getOriginalType(); | |||
2610 | return T; | |||
2611 | } | |||
2612 | ||||
2613 | ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
2614 | return new (C, ID) | |||
2615 | ParmVarDecl(ParmVar, C, nullptr, SourceLocation(), SourceLocation(), | |||
2616 | nullptr, QualType(), nullptr, SC_None, nullptr); | |||
2617 | } | |||
2618 | ||||
2619 | SourceRange ParmVarDecl::getSourceRange() const { | |||
2620 | if (!hasInheritedDefaultArg()) { | |||
2621 | SourceRange ArgRange = getDefaultArgRange(); | |||
2622 | if (ArgRange.isValid()) | |||
2623 | return SourceRange(getOuterLocStart(), ArgRange.getEnd()); | |||
2624 | } | |||
2625 | ||||
2626 | // DeclaratorDecl considers the range of postfix types as overlapping with the | |||
2627 | // declaration name, but this is not the case with parameters in ObjC methods. | |||
2628 | if (isa<ObjCMethodDecl>(getDeclContext())) | |||
2629 | return SourceRange(DeclaratorDecl::getBeginLoc(), getLocation()); | |||
2630 | ||||
2631 | return DeclaratorDecl::getSourceRange(); | |||
2632 | } | |||
2633 | ||||
2634 | Expr *ParmVarDecl::getDefaultArg() { | |||
2635 | assert(!hasUnparsedDefaultArg() && "Default argument is not yet parsed!")((!hasUnparsedDefaultArg() && "Default argument is not yet parsed!" ) ? static_cast<void> (0) : __assert_fail ("!hasUnparsedDefaultArg() && \"Default argument is not yet parsed!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2635, __PRETTY_FUNCTION__)); | |||
2636 | assert(!hasUninstantiatedDefaultArg() &&((!hasUninstantiatedDefaultArg() && "Default argument is not yet instantiated!" ) ? static_cast<void> (0) : __assert_fail ("!hasUninstantiatedDefaultArg() && \"Default argument is not yet instantiated!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2637, __PRETTY_FUNCTION__)) | |||
2637 | "Default argument is not yet instantiated!")((!hasUninstantiatedDefaultArg() && "Default argument is not yet instantiated!" ) ? static_cast<void> (0) : __assert_fail ("!hasUninstantiatedDefaultArg() && \"Default argument is not yet instantiated!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2637, __PRETTY_FUNCTION__)); | |||
2638 | ||||
2639 | Expr *Arg = getInit(); | |||
2640 | if (auto *E = dyn_cast_or_null<FullExpr>(Arg)) | |||
2641 | return E->getSubExpr(); | |||
2642 | ||||
2643 | return Arg; | |||
2644 | } | |||
2645 | ||||
2646 | void ParmVarDecl::setDefaultArg(Expr *defarg) { | |||
2647 | ParmVarDeclBits.DefaultArgKind = DAK_Normal; | |||
2648 | Init = defarg; | |||
2649 | } | |||
2650 | ||||
2651 | SourceRange ParmVarDecl::getDefaultArgRange() const { | |||
2652 | switch (ParmVarDeclBits.DefaultArgKind) { | |||
2653 | case DAK_None: | |||
2654 | case DAK_Unparsed: | |||
2655 | // Nothing we can do here. | |||
2656 | return SourceRange(); | |||
2657 | ||||
2658 | case DAK_Uninstantiated: | |||
2659 | return getUninstantiatedDefaultArg()->getSourceRange(); | |||
2660 | ||||
2661 | case DAK_Normal: | |||
2662 | if (const Expr *E = getInit()) | |||
2663 | return E->getSourceRange(); | |||
2664 | ||||
2665 | // Missing an actual expression, may be invalid. | |||
2666 | return SourceRange(); | |||
2667 | } | |||
2668 | llvm_unreachable("Invalid default argument kind.")::llvm::llvm_unreachable_internal("Invalid default argument kind." , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2668); | |||
2669 | } | |||
2670 | ||||
2671 | void ParmVarDecl::setUninstantiatedDefaultArg(Expr *arg) { | |||
2672 | ParmVarDeclBits.DefaultArgKind = DAK_Uninstantiated; | |||
2673 | Init = arg; | |||
2674 | } | |||
2675 | ||||
2676 | Expr *ParmVarDecl::getUninstantiatedDefaultArg() { | |||
2677 | assert(hasUninstantiatedDefaultArg() &&((hasUninstantiatedDefaultArg() && "Wrong kind of initialization expression!" ) ? static_cast<void> (0) : __assert_fail ("hasUninstantiatedDefaultArg() && \"Wrong kind of initialization expression!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2678, __PRETTY_FUNCTION__)) | |||
2678 | "Wrong kind of initialization expression!")((hasUninstantiatedDefaultArg() && "Wrong kind of initialization expression!" ) ? static_cast<void> (0) : __assert_fail ("hasUninstantiatedDefaultArg() && \"Wrong kind of initialization expression!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2678, __PRETTY_FUNCTION__)); | |||
2679 | return cast_or_null<Expr>(Init.get<Stmt *>()); | |||
2680 | } | |||
2681 | ||||
2682 | bool ParmVarDecl::hasDefaultArg() const { | |||
2683 | // FIXME: We should just return false for DAK_None here once callers are | |||
2684 | // prepared for the case that we encountered an invalid default argument and | |||
2685 | // were unable to even build an invalid expression. | |||
2686 | return hasUnparsedDefaultArg() || hasUninstantiatedDefaultArg() || | |||
2687 | !Init.isNull(); | |||
2688 | } | |||
2689 | ||||
2690 | void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) { | |||
2691 | getASTContext().setParameterIndex(this, parameterIndex); | |||
2692 | ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel; | |||
2693 | } | |||
2694 | ||||
2695 | unsigned ParmVarDecl::getParameterIndexLarge() const { | |||
2696 | return getASTContext().getParameterIndex(this); | |||
2697 | } | |||
2698 | ||||
2699 | //===----------------------------------------------------------------------===// | |||
2700 | // FunctionDecl Implementation | |||
2701 | //===----------------------------------------------------------------------===// | |||
2702 | ||||
2703 | FunctionDecl::FunctionDecl(Kind DK, ASTContext &C, DeclContext *DC, | |||
2704 | SourceLocation StartLoc, | |||
2705 | const DeclarationNameInfo &NameInfo, QualType T, | |||
2706 | TypeSourceInfo *TInfo, StorageClass S, | |||
2707 | bool isInlineSpecified, bool isConstexprSpecified) | |||
2708 | : DeclaratorDecl(DK, DC, NameInfo.getLoc(), NameInfo.getName(), T, TInfo, | |||
2709 | StartLoc), | |||
2710 | DeclContext(DK), redeclarable_base(C), ODRHash(0), | |||
2711 | EndRangeLoc(NameInfo.getEndLoc()), DNLoc(NameInfo.getInfo()) { | |||
2712 | assert(T.isNull() || T->isFunctionType())((T.isNull() || T->isFunctionType()) ? static_cast<void > (0) : __assert_fail ("T.isNull() || T->isFunctionType()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2712, __PRETTY_FUNCTION__)); | |||
2713 | FunctionDeclBits.SClass = S; | |||
2714 | FunctionDeclBits.IsInline = isInlineSpecified; | |||
2715 | FunctionDeclBits.IsInlineSpecified = isInlineSpecified; | |||
2716 | FunctionDeclBits.IsVirtualAsWritten = false; | |||
2717 | FunctionDeclBits.IsPure = false; | |||
2718 | FunctionDeclBits.HasInheritedPrototype = false; | |||
2719 | FunctionDeclBits.HasWrittenPrototype = true; | |||
2720 | FunctionDeclBits.IsDeleted = false; | |||
2721 | FunctionDeclBits.IsTrivial = false; | |||
2722 | FunctionDeclBits.IsTrivialForCall = false; | |||
2723 | FunctionDeclBits.IsDefaulted = false; | |||
2724 | FunctionDeclBits.IsExplicitlyDefaulted = false; | |||
2725 | FunctionDeclBits.HasImplicitReturnZero = false; | |||
2726 | FunctionDeclBits.IsLateTemplateParsed = false; | |||
2727 | FunctionDeclBits.IsConstexpr = isConstexprSpecified; | |||
2728 | FunctionDeclBits.InstantiationIsPending = false; | |||
2729 | FunctionDeclBits.UsesSEHTry = false; | |||
2730 | FunctionDeclBits.HasSkippedBody = false; | |||
2731 | FunctionDeclBits.WillHaveBody = false; | |||
2732 | FunctionDeclBits.IsMultiVersion = false; | |||
2733 | FunctionDeclBits.IsCopyDeductionCandidate = false; | |||
2734 | FunctionDeclBits.HasODRHash = false; | |||
2735 | } | |||
2736 | ||||
2737 | void FunctionDecl::getNameForDiagnostic( | |||
2738 | raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const { | |||
2739 | NamedDecl::getNameForDiagnostic(OS, Policy, Qualified); | |||
2740 | const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs(); | |||
2741 | if (TemplateArgs) | |||
2742 | printTemplateArgumentList(OS, TemplateArgs->asArray(), Policy); | |||
2743 | } | |||
2744 | ||||
2745 | bool FunctionDecl::isVariadic() const { | |||
2746 | if (const auto *FT = getType()->getAs<FunctionProtoType>()) | |||
2747 | return FT->isVariadic(); | |||
2748 | return false; | |||
2749 | } | |||
2750 | ||||
2751 | bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const { | |||
2752 | for (auto I : redecls()) { | |||
2753 | if (I->doesThisDeclarationHaveABody()) { | |||
2754 | Definition = I; | |||
2755 | return true; | |||
2756 | } | |||
2757 | } | |||
2758 | ||||
2759 | return false; | |||
2760 | } | |||
2761 | ||||
2762 | bool FunctionDecl::hasTrivialBody() const | |||
2763 | { | |||
2764 | Stmt *S = getBody(); | |||
2765 | if (!S) { | |||
2766 | // Since we don't have a body for this function, we don't know if it's | |||
2767 | // trivial or not. | |||
2768 | return false; | |||
2769 | } | |||
2770 | ||||
2771 | if (isa<CompoundStmt>(S) && cast<CompoundStmt>(S)->body_empty()) | |||
2772 | return true; | |||
2773 | return false; | |||
2774 | } | |||
2775 | ||||
2776 | bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const { | |||
2777 | for (auto I : redecls()) { | |||
2778 | if (I->isThisDeclarationADefinition()) { | |||
2779 | Definition = I; | |||
2780 | return true; | |||
2781 | } | |||
2782 | } | |||
2783 | ||||
2784 | return false; | |||
2785 | } | |||
2786 | ||||
2787 | Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const { | |||
2788 | if (!hasBody(Definition)) | |||
2789 | return nullptr; | |||
2790 | ||||
2791 | if (Definition->Body) | |||
2792 | return Definition->Body.get(getASTContext().getExternalSource()); | |||
2793 | ||||
2794 | return nullptr; | |||
2795 | } | |||
2796 | ||||
2797 | void FunctionDecl::setBody(Stmt *B) { | |||
2798 | Body = B; | |||
2799 | if (B) | |||
2800 | EndRangeLoc = B->getEndLoc(); | |||
2801 | } | |||
2802 | ||||
2803 | void FunctionDecl::setPure(bool P) { | |||
2804 | FunctionDeclBits.IsPure = P; | |||
2805 | if (P) | |||
2806 | if (auto *Parent = dyn_cast<CXXRecordDecl>(getDeclContext())) | |||
2807 | Parent->markedVirtualFunctionPure(); | |||
2808 | } | |||
2809 | ||||
2810 | template<std::size_t Len> | |||
2811 | static bool isNamed(const NamedDecl *ND, const char (&Str)[Len]) { | |||
2812 | IdentifierInfo *II = ND->getIdentifier(); | |||
2813 | return II && II->isStr(Str); | |||
2814 | } | |||
2815 | ||||
2816 | bool FunctionDecl::isMain() const { | |||
2817 | const TranslationUnitDecl *tunit = | |||
2818 | dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()); | |||
2819 | return tunit && | |||
2820 | !tunit->getASTContext().getLangOpts().Freestanding && | |||
2821 | isNamed(this, "main"); | |||
2822 | } | |||
2823 | ||||
2824 | bool FunctionDecl::isMSVCRTEntryPoint() const { | |||
2825 | const TranslationUnitDecl *TUnit = | |||
2826 | dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()); | |||
2827 | if (!TUnit) | |||
2828 | return false; | |||
2829 | ||||
2830 | // Even though we aren't really targeting MSVCRT if we are freestanding, | |||
2831 | // semantic analysis for these functions remains the same. | |||
2832 | ||||
2833 | // MSVCRT entry points only exist on MSVCRT targets. | |||
2834 | if (!TUnit->getASTContext().getTargetInfo().getTriple().isOSMSVCRT()) | |||
2835 | return false; | |||
2836 | ||||
2837 | // Nameless functions like constructors cannot be entry points. | |||
2838 | if (!getIdentifier()) | |||
2839 | return false; | |||
2840 | ||||
2841 | return llvm::StringSwitch<bool>(getName()) | |||
2842 | .Cases("main", // an ANSI console app | |||
2843 | "wmain", // a Unicode console App | |||
2844 | "WinMain", // an ANSI GUI app | |||
2845 | "wWinMain", // a Unicode GUI app | |||
2846 | "DllMain", // a DLL | |||
2847 | true) | |||
2848 | .Default(false); | |||
2849 | } | |||
2850 | ||||
2851 | bool FunctionDecl::isReservedGlobalPlacementOperator() const { | |||
2852 | assert(getDeclName().getNameKind() == DeclarationName::CXXOperatorName)((getDeclName().getNameKind() == DeclarationName::CXXOperatorName ) ? static_cast<void> (0) : __assert_fail ("getDeclName().getNameKind() == DeclarationName::CXXOperatorName" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2852, __PRETTY_FUNCTION__)); | |||
2853 | assert(getDeclName().getCXXOverloadedOperator() == OO_New ||((getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName ().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator () == OO_Array_New || getDeclName().getCXXOverloadedOperator( ) == OO_Array_Delete) ? static_cast<void> (0) : __assert_fail ("getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator() == OO_Array_New || getDeclName().getCXXOverloadedOperator() == OO_Array_Delete" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2856, __PRETTY_FUNCTION__)) | |||
2854 | getDeclName().getCXXOverloadedOperator() == OO_Delete ||((getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName ().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator () == OO_Array_New || getDeclName().getCXXOverloadedOperator( ) == OO_Array_Delete) ? static_cast<void> (0) : __assert_fail ("getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator() == OO_Array_New || getDeclName().getCXXOverloadedOperator() == OO_Array_Delete" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2856, __PRETTY_FUNCTION__)) | |||
2855 | getDeclName().getCXXOverloadedOperator() == OO_Array_New ||((getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName ().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator () == OO_Array_New || getDeclName().getCXXOverloadedOperator( ) == OO_Array_Delete) ? static_cast<void> (0) : __assert_fail ("getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator() == OO_Array_New || getDeclName().getCXXOverloadedOperator() == OO_Array_Delete" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2856, __PRETTY_FUNCTION__)) | |||
2856 | getDeclName().getCXXOverloadedOperator() == OO_Array_Delete)((getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName ().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator () == OO_Array_New || getDeclName().getCXXOverloadedOperator( ) == OO_Array_Delete) ? static_cast<void> (0) : __assert_fail ("getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator() == OO_Array_New || getDeclName().getCXXOverloadedOperator() == OO_Array_Delete" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 2856, __PRETTY_FUNCTION__)); | |||
2857 | ||||
2858 | if (!getDeclContext()->getRedeclContext()->isTranslationUnit()) | |||
2859 | return false; | |||
2860 | ||||
2861 | const auto *proto = getType()->castAs<FunctionProtoType>(); | |||
2862 | if (proto->getNumParams() != 2 || proto->isVariadic()) | |||
2863 | return false; | |||
2864 | ||||
2865 | ASTContext &Context = | |||
2866 | cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()) | |||
2867 | ->getASTContext(); | |||
2868 | ||||
2869 | // The result type and first argument type are constant across all | |||
2870 | // these operators. The second argument must be exactly void*. | |||
2871 | return (proto->getParamType(1).getCanonicalType() == Context.VoidPtrTy); | |||
2872 | } | |||
2873 | ||||
2874 | bool FunctionDecl::isReplaceableGlobalAllocationFunction(bool *IsAligned) const { | |||
2875 | if (getDeclName().getNameKind() != DeclarationName::CXXOperatorName) | |||
2876 | return false; | |||
2877 | if (getDeclName().getCXXOverloadedOperator() != OO_New && | |||
2878 | getDeclName().getCXXOverloadedOperator() != OO_Delete && | |||
2879 | getDeclName().getCXXOverloadedOperator() != OO_Array_New && | |||
2880 | getDeclName().getCXXOverloadedOperator() != OO_Array_Delete) | |||
2881 | return false; | |||
2882 | ||||
2883 | if (isa<CXXRecordDecl>(getDeclContext())) | |||
2884 | return false; | |||
2885 | ||||
2886 | // This can only fail for an invalid 'operator new' declaration. | |||
2887 | if (!getDeclContext()->getRedeclContext()->isTranslationUnit()) | |||
2888 | return false; | |||
2889 | ||||
2890 | const auto *FPT = getType()->castAs<FunctionProtoType>(); | |||
2891 | if (FPT->getNumParams() == 0 || FPT->getNumParams() > 3 || FPT->isVariadic()) | |||
2892 | return false; | |||
2893 | ||||
2894 | // If this is a single-parameter function, it must be a replaceable global | |||
2895 | // allocation or deallocation function. | |||
2896 | if (FPT->getNumParams() == 1) | |||
2897 | return true; | |||
2898 | ||||
2899 | unsigned Params = 1; | |||
2900 | QualType Ty = FPT->getParamType(Params); | |||
2901 | ASTContext &Ctx = getASTContext(); | |||
2902 | ||||
2903 | auto Consume = [&] { | |||
2904 | ++Params; | |||
2905 | Ty = Params < FPT->getNumParams() ? FPT->getParamType(Params) : QualType(); | |||
2906 | }; | |||
2907 | ||||
2908 | // In C++14, the next parameter can be a 'std::size_t' for sized delete. | |||
2909 | bool IsSizedDelete = false; | |||
2910 | if (Ctx.getLangOpts().SizedDeallocation && | |||
2911 | (getDeclName().getCXXOverloadedOperator() == OO_Delete || | |||
2912 | getDeclName().getCXXOverloadedOperator() == OO_Array_Delete) && | |||
2913 | Ctx.hasSameType(Ty, Ctx.getSizeType())) { | |||
2914 | IsSizedDelete = true; | |||
2915 | Consume(); | |||
2916 | } | |||
2917 | ||||
2918 | // In C++17, the next parameter can be a 'std::align_val_t' for aligned | |||
2919 | // new/delete. | |||
2920 | if (Ctx.getLangOpts().AlignedAllocation && !Ty.isNull() && Ty->isAlignValT()) { | |||
2921 | if (IsAligned) | |||
2922 | *IsAligned = true; | |||
2923 | Consume(); | |||
2924 | } | |||
2925 | ||||
2926 | // Finally, if this is not a sized delete, the final parameter can | |||
2927 | // be a 'const std::nothrow_t&'. | |||
2928 | if (!IsSizedDelete && !Ty.isNull() && Ty->isReferenceType()) { | |||
2929 | Ty = Ty->getPointeeType(); | |||
2930 | if (Ty.getCVRQualifiers() != Qualifiers::Const) | |||
2931 | return false; | |||
2932 | const CXXRecordDecl *RD = Ty->getAsCXXRecordDecl(); | |||
2933 | if (RD && isNamed(RD, "nothrow_t") && RD->isInStdNamespace()) | |||
2934 | Consume(); | |||
2935 | } | |||
2936 | ||||
2937 | return Params == FPT->getNumParams(); | |||
2938 | } | |||
2939 | ||||
2940 | bool FunctionDecl::isDestroyingOperatorDelete() const { | |||
2941 | // C++ P0722: | |||
2942 | // Within a class C, a single object deallocation function with signature | |||
2943 | // (T, std::destroying_delete_t, <more params>) | |||
2944 | // is a destroying operator delete. | |||
2945 | if (!isa<CXXMethodDecl>(this) || getOverloadedOperator() != OO_Delete || | |||
2946 | getNumParams() < 2) | |||
2947 | return false; | |||
2948 | ||||
2949 | auto *RD = getParamDecl(1)->getType()->getAsCXXRecordDecl(); | |||
2950 | return RD && RD->isInStdNamespace() && RD->getIdentifier() && | |||
2951 | RD->getIdentifier()->isStr("destroying_delete_t"); | |||
2952 | } | |||
2953 | ||||
2954 | LanguageLinkage FunctionDecl::getLanguageLinkage() const { | |||
2955 | return getDeclLanguageLinkage(*this); | |||
2956 | } | |||
2957 | ||||
2958 | bool FunctionDecl::isExternC() const { | |||
2959 | return isDeclExternC(*this); | |||
2960 | } | |||
2961 | ||||
2962 | bool FunctionDecl::isInExternCContext() const { | |||
2963 | if (hasAttr<OpenCLKernelAttr>()) | |||
2964 | return true; | |||
2965 | return getLexicalDeclContext()->isExternCContext(); | |||
2966 | } | |||
2967 | ||||
2968 | bool FunctionDecl::isInExternCXXContext() const { | |||
2969 | return getLexicalDeclContext()->isExternCXXContext(); | |||
2970 | } | |||
2971 | ||||
2972 | bool FunctionDecl::isGlobal() const { | |||
2973 | if (const auto *Method = dyn_cast<CXXMethodDecl>(this)) | |||
2974 | return Method->isStatic(); | |||
2975 | ||||
2976 | if (getCanonicalDecl()->getStorageClass() == SC_Static) | |||
2977 | return false; | |||
2978 | ||||
2979 | for (const DeclContext *DC = getDeclContext(); | |||
2980 | DC->isNamespace(); | |||
2981 | DC = DC->getParent()) { | |||
2982 | if (const auto *Namespace = cast<NamespaceDecl>(DC)) { | |||
2983 | if (!Namespace->getDeclName()) | |||
2984 | return false; | |||
2985 | break; | |||
2986 | } | |||
2987 | } | |||
2988 | ||||
2989 | return true; | |||
2990 | } | |||
2991 | ||||
2992 | bool FunctionDecl::isNoReturn() const { | |||
2993 | if (hasAttr<NoReturnAttr>() || hasAttr<CXX11NoReturnAttr>() || | |||
2994 | hasAttr<C11NoReturnAttr>()) | |||
2995 | return true; | |||
2996 | ||||
2997 | if (auto *FnTy = getType()->getAs<FunctionType>()) | |||
2998 | return FnTy->getNoReturnAttr(); | |||
2999 | ||||
3000 | return false; | |||
3001 | } | |||
3002 | ||||
3003 | ||||
3004 | MultiVersionKind FunctionDecl::getMultiVersionKind() const { | |||
3005 | if (hasAttr<TargetAttr>()) | |||
3006 | return MultiVersionKind::Target; | |||
3007 | if (hasAttr<CPUDispatchAttr>()) | |||
3008 | return MultiVersionKind::CPUDispatch; | |||
3009 | if (hasAttr<CPUSpecificAttr>()) | |||
3010 | return MultiVersionKind::CPUSpecific; | |||
3011 | return MultiVersionKind::None; | |||
3012 | } | |||
3013 | ||||
3014 | bool FunctionDecl::isCPUDispatchMultiVersion() const { | |||
3015 | return isMultiVersion() && hasAttr<CPUDispatchAttr>(); | |||
3016 | } | |||
3017 | ||||
3018 | bool FunctionDecl::isCPUSpecificMultiVersion() const { | |||
3019 | return isMultiVersion() && hasAttr<CPUSpecificAttr>(); | |||
3020 | } | |||
3021 | ||||
3022 | bool FunctionDecl::isTargetMultiVersion() const { | |||
3023 | return isMultiVersion() && hasAttr<TargetAttr>(); | |||
3024 | } | |||
3025 | ||||
3026 | void | |||
3027 | FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) { | |||
3028 | redeclarable_base::setPreviousDecl(PrevDecl); | |||
3029 | ||||
3030 | if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) { | |||
3031 | FunctionTemplateDecl *PrevFunTmpl | |||
3032 | = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : nullptr; | |||
3033 | assert((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch")(((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch" ) ? static_cast<void> (0) : __assert_fail ("(!PrevDecl || PrevFunTmpl) && \"Function/function template mismatch\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3033, __PRETTY_FUNCTION__)); | |||
3034 | FunTmpl->setPreviousDecl(PrevFunTmpl); | |||
3035 | } | |||
3036 | ||||
3037 | if (PrevDecl && PrevDecl->isInlined()) | |||
3038 | setImplicitlyInline(true); | |||
3039 | } | |||
3040 | ||||
3041 | FunctionDecl *FunctionDecl::getCanonicalDecl() { return getFirstDecl(); } | |||
3042 | ||||
3043 | /// Returns a value indicating whether this function corresponds to a builtin | |||
3044 | /// function. | |||
3045 | /// | |||
3046 | /// The function corresponds to a built-in function if it is declared at | |||
3047 | /// translation scope or within an extern "C" block and its name matches with | |||
3048 | /// the name of a builtin. The returned value will be 0 for functions that do | |||
3049 | /// not correspond to a builtin, a value of type \c Builtin::ID if in the | |||
3050 | /// target-independent range \c [1,Builtin::First), or a target-specific builtin | |||
3051 | /// value. | |||
3052 | /// | |||
3053 | /// \param ConsiderWrapperFunctions If true, we should consider wrapper | |||
3054 | /// functions as their wrapped builtins. This shouldn't be done in general, but | |||
3055 | /// it's useful in Sema to diagnose calls to wrappers based on their semantics. | |||
3056 | unsigned FunctionDecl::getBuiltinID(bool ConsiderWrapperFunctions) const { | |||
3057 | if (!getIdentifier()) | |||
3058 | return 0; | |||
3059 | ||||
3060 | unsigned BuiltinID = getIdentifier()->getBuiltinID(); | |||
3061 | if (!BuiltinID) | |||
3062 | return 0; | |||
3063 | ||||
3064 | ASTContext &Context = getASTContext(); | |||
3065 | if (Context.getLangOpts().CPlusPlus) { | |||
3066 | const auto *LinkageDecl = | |||
3067 | dyn_cast<LinkageSpecDecl>(getFirstDecl()->getDeclContext()); | |||
3068 | // In C++, the first declaration of a builtin is always inside an implicit | |||
3069 | // extern "C". | |||
3070 | // FIXME: A recognised library function may not be directly in an extern "C" | |||
3071 | // declaration, for instance "extern "C" { namespace std { decl } }". | |||
3072 | if (!LinkageDecl) { | |||
3073 | if (BuiltinID == Builtin::BI__GetExceptionInfo && | |||
3074 | Context.getTargetInfo().getCXXABI().isMicrosoft()) | |||
3075 | return Builtin::BI__GetExceptionInfo; | |||
3076 | return 0; | |||
3077 | } | |||
3078 | if (LinkageDecl->getLanguage() != LinkageSpecDecl::lang_c) | |||
3079 | return 0; | |||
3080 | } | |||
3081 | ||||
3082 | // If the function is marked "overloadable", it has a different mangled name | |||
3083 | // and is not the C library function. | |||
3084 | if (!ConsiderWrapperFunctions && hasAttr<OverloadableAttr>()) | |||
3085 | return 0; | |||
3086 | ||||
3087 | if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) | |||
3088 | return BuiltinID; | |||
3089 | ||||
3090 | // This function has the name of a known C library | |||
3091 | // function. Determine whether it actually refers to the C library | |||
3092 | // function or whether it just has the same name. | |||
3093 | ||||
3094 | // If this is a static function, it's not a builtin. | |||
3095 | if (!ConsiderWrapperFunctions && getStorageClass() == SC_Static) | |||
3096 | return 0; | |||
3097 | ||||
3098 | // OpenCL v1.2 s6.9.f - The library functions defined in | |||
3099 | // the C99 standard headers are not available. | |||
3100 | if (Context.getLangOpts().OpenCL && | |||
3101 | Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) | |||
3102 | return 0; | |||
3103 | ||||
3104 | // CUDA does not have device-side standard library. printf and malloc are the | |||
3105 | // only special cases that are supported by device-side runtime. | |||
3106 | if (Context.getLangOpts().CUDA && hasAttr<CUDADeviceAttr>() && | |||
3107 | !hasAttr<CUDAHostAttr>() && | |||
3108 | !(BuiltinID == Builtin::BIprintf || BuiltinID == Builtin::BImalloc)) | |||
3109 | return 0; | |||
3110 | ||||
3111 | return BuiltinID; | |||
3112 | } | |||
3113 | ||||
3114 | /// getNumParams - Return the number of parameters this function must have | |||
3115 | /// based on its FunctionType. This is the length of the ParamInfo array | |||
3116 | /// after it has been created. | |||
3117 | unsigned FunctionDecl::getNumParams() const { | |||
3118 | const auto *FPT = getType()->getAs<FunctionProtoType>(); | |||
3119 | return FPT ? FPT->getNumParams() : 0; | |||
3120 | } | |||
3121 | ||||
3122 | void FunctionDecl::setParams(ASTContext &C, | |||
3123 | ArrayRef<ParmVarDecl *> NewParamInfo) { | |||
3124 | assert(!ParamInfo && "Already has param info!")((!ParamInfo && "Already has param info!") ? static_cast <void> (0) : __assert_fail ("!ParamInfo && \"Already has param info!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3124, __PRETTY_FUNCTION__)); | |||
3125 | assert(NewParamInfo.size() == getNumParams() && "Parameter count mismatch!")((NewParamInfo.size() == getNumParams() && "Parameter count mismatch!" ) ? static_cast<void> (0) : __assert_fail ("NewParamInfo.size() == getNumParams() && \"Parameter count mismatch!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3125, __PRETTY_FUNCTION__)); | |||
3126 | ||||
3127 | // Zero params -> null pointer. | |||
3128 | if (!NewParamInfo.empty()) { | |||
3129 | ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()]; | |||
3130 | std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo); | |||
3131 | } | |||
3132 | } | |||
3133 | ||||
3134 | /// getMinRequiredArguments - Returns the minimum number of arguments | |||
3135 | /// needed to call this function. This may be fewer than the number of | |||
3136 | /// function parameters, if some of the parameters have default | |||
3137 | /// arguments (in C++) or are parameter packs (C++11). | |||
3138 | unsigned FunctionDecl::getMinRequiredArguments() const { | |||
3139 | if (!getASTContext().getLangOpts().CPlusPlus) | |||
3140 | return getNumParams(); | |||
3141 | ||||
3142 | unsigned NumRequiredArgs = 0; | |||
3143 | for (auto *Param : parameters()) | |||
3144 | if (!Param->isParameterPack() && !Param->hasDefaultArg()) | |||
3145 | ++NumRequiredArgs; | |||
3146 | return NumRequiredArgs; | |||
3147 | } | |||
3148 | ||||
3149 | /// The combination of the extern and inline keywords under MSVC forces | |||
3150 | /// the function to be required. | |||
3151 | /// | |||
3152 | /// Note: This function assumes that we will only get called when isInlined() | |||
3153 | /// would return true for this FunctionDecl. | |||
3154 | bool FunctionDecl::isMSExternInline() const { | |||
3155 | assert(isInlined() && "expected to get called on an inlined function!")((isInlined() && "expected to get called on an inlined function!" ) ? static_cast<void> (0) : __assert_fail ("isInlined() && \"expected to get called on an inlined function!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3155, __PRETTY_FUNCTION__)); | |||
3156 | ||||
3157 | const ASTContext &Context = getASTContext(); | |||
3158 | if (!Context.getTargetInfo().getCXXABI().isMicrosoft() && | |||
3159 | !hasAttr<DLLExportAttr>()) | |||
3160 | return false; | |||
3161 | ||||
3162 | for (const FunctionDecl *FD = getMostRecentDecl(); FD; | |||
3163 | FD = FD->getPreviousDecl()) | |||
3164 | if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern) | |||
3165 | return true; | |||
3166 | ||||
3167 | return false; | |||
3168 | } | |||
3169 | ||||
3170 | static bool redeclForcesDefMSVC(const FunctionDecl *Redecl) { | |||
3171 | if (Redecl->getStorageClass() != SC_Extern) | |||
3172 | return false; | |||
3173 | ||||
3174 | for (const FunctionDecl *FD = Redecl->getPreviousDecl(); FD; | |||
3175 | FD = FD->getPreviousDecl()) | |||
3176 | if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern) | |||
3177 | return false; | |||
3178 | ||||
3179 | return true; | |||
3180 | } | |||
3181 | ||||
3182 | static bool RedeclForcesDefC99(const FunctionDecl *Redecl) { | |||
3183 | // Only consider file-scope declarations in this test. | |||
3184 | if (!Redecl->getLexicalDeclContext()->isTranslationUnit()) | |||
3185 | return false; | |||
3186 | ||||
3187 | // Only consider explicit declarations; the presence of a builtin for a | |||
3188 | // libcall shouldn't affect whether a definition is externally visible. | |||
3189 | if (Redecl->isImplicit()) | |||
3190 | return false; | |||
3191 | ||||
3192 | if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == SC_Extern) | |||
3193 | return true; // Not an inline definition | |||
3194 | ||||
3195 | return false; | |||
3196 | } | |||
3197 | ||||
3198 | /// For a function declaration in C or C++, determine whether this | |||
3199 | /// declaration causes the definition to be externally visible. | |||
3200 | /// | |||
3201 | /// For instance, this determines if adding the current declaration to the set | |||
3202 | /// of redeclarations of the given functions causes | |||
3203 | /// isInlineDefinitionExternallyVisible to change from false to true. | |||
3204 | bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const { | |||
3205 | assert(!doesThisDeclarationHaveABody() &&((!doesThisDeclarationHaveABody() && "Must have a declaration without a body." ) ? static_cast<void> (0) : __assert_fail ("!doesThisDeclarationHaveABody() && \"Must have a declaration without a body.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3206, __PRETTY_FUNCTION__)) | |||
3206 | "Must have a declaration without a body.")((!doesThisDeclarationHaveABody() && "Must have a declaration without a body." ) ? static_cast<void> (0) : __assert_fail ("!doesThisDeclarationHaveABody() && \"Must have a declaration without a body.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3206, __PRETTY_FUNCTION__)); | |||
3207 | ||||
3208 | ASTContext &Context = getASTContext(); | |||
3209 | ||||
3210 | if (Context.getLangOpts().MSVCCompat) { | |||
3211 | const FunctionDecl *Definition; | |||
3212 | if (hasBody(Definition) && Definition->isInlined() && | |||
3213 | redeclForcesDefMSVC(this)) | |||
3214 | return true; | |||
3215 | } | |||
3216 | ||||
3217 | if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) { | |||
3218 | // With GNU inlining, a declaration with 'inline' but not 'extern', forces | |||
3219 | // an externally visible definition. | |||
3220 | // | |||
3221 | // FIXME: What happens if gnu_inline gets added on after the first | |||
3222 | // declaration? | |||
3223 | if (!isInlineSpecified() || getStorageClass() == SC_Extern) | |||
3224 | return false; | |||
3225 | ||||
3226 | const FunctionDecl *Prev = this; | |||
3227 | bool FoundBody = false; | |||
3228 | while ((Prev = Prev->getPreviousDecl())) { | |||
3229 | FoundBody |= Prev->Body.isValid(); | |||
3230 | ||||
3231 | if (Prev->Body) { | |||
3232 | // If it's not the case that both 'inline' and 'extern' are | |||
3233 | // specified on the definition, then it is always externally visible. | |||
3234 | if (!Prev->isInlineSpecified() || | |||
3235 | Prev->getStorageClass() != SC_Extern) | |||
3236 | return false; | |||
3237 | } else if (Prev->isInlineSpecified() && | |||
3238 | Prev->getStorageClass() != SC_Extern) { | |||
3239 | return false; | |||
3240 | } | |||
3241 | } | |||
3242 | return FoundBody; | |||
3243 | } | |||
3244 | ||||
3245 | if (Context.getLangOpts().CPlusPlus) | |||
3246 | return false; | |||
3247 | ||||
3248 | // C99 6.7.4p6: | |||
3249 | // [...] If all of the file scope declarations for a function in a | |||
3250 | // translation unit include the inline function specifier without extern, | |||
3251 | // then the definition in that translation unit is an inline definition. | |||
3252 | if (isInlineSpecified() && getStorageClass() != SC_Extern) | |||
3253 | return false; | |||
3254 | const FunctionDecl *Prev = this; | |||
3255 | bool FoundBody = false; | |||
3256 | while ((Prev = Prev->getPreviousDecl())) { | |||
3257 | FoundBody |= Prev->Body.isValid(); | |||
3258 | if (RedeclForcesDefC99(Prev)) | |||
3259 | return false; | |||
3260 | } | |||
3261 | return FoundBody; | |||
3262 | } | |||
3263 | ||||
3264 | SourceRange FunctionDecl::getReturnTypeSourceRange() const { | |||
3265 | const TypeSourceInfo *TSI = getTypeSourceInfo(); | |||
3266 | if (!TSI) | |||
3267 | return SourceRange(); | |||
3268 | FunctionTypeLoc FTL = | |||
3269 | TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>(); | |||
3270 | if (!FTL) | |||
3271 | return SourceRange(); | |||
3272 | ||||
3273 | // Skip self-referential return types. | |||
3274 | const SourceManager &SM = getASTContext().getSourceManager(); | |||
3275 | SourceRange RTRange = FTL.getReturnLoc().getSourceRange(); | |||
3276 | SourceLocation Boundary = getNameInfo().getBeginLoc(); | |||
3277 | if (RTRange.isInvalid() || Boundary.isInvalid() || | |||
3278 | !SM.isBeforeInTranslationUnit(RTRange.getEnd(), Boundary)) | |||
3279 | return SourceRange(); | |||
3280 | ||||
3281 | return RTRange; | |||
3282 | } | |||
3283 | ||||
3284 | SourceRange FunctionDecl::getExceptionSpecSourceRange() const { | |||
3285 | const TypeSourceInfo *TSI = getTypeSourceInfo(); | |||
3286 | if (!TSI) | |||
3287 | return SourceRange(); | |||
3288 | FunctionTypeLoc FTL = | |||
3289 | TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>(); | |||
3290 | if (!FTL) | |||
3291 | return SourceRange(); | |||
3292 | ||||
3293 | return FTL.getExceptionSpecRange(); | |||
3294 | } | |||
3295 | ||||
3296 | /// For an inline function definition in C, or for a gnu_inline function | |||
3297 | /// in C++, determine whether the definition will be externally visible. | |||
3298 | /// | |||
3299 | /// Inline function definitions are always available for inlining optimizations. | |||
3300 | /// However, depending on the language dialect, declaration specifiers, and | |||
3301 | /// attributes, the definition of an inline function may or may not be | |||
3302 | /// "externally" visible to other translation units in the program. | |||
3303 | /// | |||
3304 | /// In C99, inline definitions are not externally visible by default. However, | |||
3305 | /// if even one of the global-scope declarations is marked "extern inline", the | |||
3306 | /// inline definition becomes externally visible (C99 6.7.4p6). | |||
3307 | /// | |||
3308 | /// In GNU89 mode, or if the gnu_inline attribute is attached to the function | |||
3309 | /// definition, we use the GNU semantics for inline, which are nearly the | |||
3310 | /// opposite of C99 semantics. In particular, "inline" by itself will create | |||
3311 | /// an externally visible symbol, but "extern inline" will not create an | |||
3312 | /// externally visible symbol. | |||
3313 | bool FunctionDecl::isInlineDefinitionExternallyVisible() const { | |||
3314 | assert((doesThisDeclarationHaveABody() || willHaveBody()) &&(((doesThisDeclarationHaveABody() || willHaveBody()) && "Must be a function definition") ? static_cast<void> ( 0) : __assert_fail ("(doesThisDeclarationHaveABody() || willHaveBody()) && \"Must be a function definition\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3315, __PRETTY_FUNCTION__)) | |||
3315 | "Must be a function definition")(((doesThisDeclarationHaveABody() || willHaveBody()) && "Must be a function definition") ? static_cast<void> ( 0) : __assert_fail ("(doesThisDeclarationHaveABody() || willHaveBody()) && \"Must be a function definition\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3315, __PRETTY_FUNCTION__)); | |||
3316 | assert(isInlined() && "Function must be inline")((isInlined() && "Function must be inline") ? static_cast <void> (0) : __assert_fail ("isInlined() && \"Function must be inline\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3316, __PRETTY_FUNCTION__)); | |||
3317 | ASTContext &Context = getASTContext(); | |||
3318 | ||||
3319 | if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) { | |||
3320 | // Note: If you change the logic here, please change | |||
3321 | // doesDeclarationForceExternallyVisibleDefinition as well. | |||
3322 | // | |||
3323 | // If it's not the case that both 'inline' and 'extern' are | |||
3324 | // specified on the definition, then this inline definition is | |||
3325 | // externally visible. | |||
3326 | if (!(isInlineSpecified() && getStorageClass() == SC_Extern)) | |||
3327 | return true; | |||
3328 | ||||
3329 | // If any declaration is 'inline' but not 'extern', then this definition | |||
3330 | // is externally visible. | |||
3331 | for (auto Redecl : redecls()) { | |||
3332 | if (Redecl->isInlineSpecified() && | |||
3333 | Redecl->getStorageClass() != SC_Extern) | |||
3334 | return true; | |||
3335 | } | |||
3336 | ||||
3337 | return false; | |||
3338 | } | |||
3339 | ||||
3340 | // The rest of this function is C-only. | |||
3341 | assert(!Context.getLangOpts().CPlusPlus &&((!Context.getLangOpts().CPlusPlus && "should not use C inline rules in C++" ) ? static_cast<void> (0) : __assert_fail ("!Context.getLangOpts().CPlusPlus && \"should not use C inline rules in C++\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3342, __PRETTY_FUNCTION__)) | |||
3342 | "should not use C inline rules in C++")((!Context.getLangOpts().CPlusPlus && "should not use C inline rules in C++" ) ? static_cast<void> (0) : __assert_fail ("!Context.getLangOpts().CPlusPlus && \"should not use C inline rules in C++\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3342, __PRETTY_FUNCTION__)); | |||
3343 | ||||
3344 | // C99 6.7.4p6: | |||
3345 | // [...] If all of the file scope declarations for a function in a | |||
3346 | // translation unit include the inline function specifier without extern, | |||
3347 | // then the definition in that translation unit is an inline definition. | |||
3348 | for (auto Redecl : redecls()) { | |||
3349 | if (RedeclForcesDefC99(Redecl)) | |||
3350 | return true; | |||
3351 | } | |||
3352 | ||||
3353 | // C99 6.7.4p6: | |||
3354 | // An inline definition does not provide an external definition for the | |||
3355 | // function, and does not forbid an external definition in another | |||
3356 | // translation unit. | |||
3357 | return false; | |||
3358 | } | |||
3359 | ||||
3360 | /// getOverloadedOperator - Which C++ overloaded operator this | |||
3361 | /// function represents, if any. | |||
3362 | OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const { | |||
3363 | if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName) | |||
3364 | return getDeclName().getCXXOverloadedOperator(); | |||
3365 | else | |||
3366 | return OO_None; | |||
3367 | } | |||
3368 | ||||
3369 | /// getLiteralIdentifier - The literal suffix identifier this function | |||
3370 | /// represents, if any. | |||
3371 | const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const { | |||
3372 | if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName) | |||
3373 | return getDeclName().getCXXLiteralIdentifier(); | |||
3374 | else | |||
3375 | return nullptr; | |||
3376 | } | |||
3377 | ||||
3378 | FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const { | |||
3379 | if (TemplateOrSpecialization.isNull()) | |||
3380 | return TK_NonTemplate; | |||
3381 | if (TemplateOrSpecialization.is<FunctionTemplateDecl *>()) | |||
3382 | return TK_FunctionTemplate; | |||
3383 | if (TemplateOrSpecialization.is<MemberSpecializationInfo *>()) | |||
3384 | return TK_MemberSpecialization; | |||
3385 | if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>()) | |||
3386 | return TK_FunctionTemplateSpecialization; | |||
3387 | if (TemplateOrSpecialization.is | |||
3388 | <DependentFunctionTemplateSpecializationInfo*>()) | |||
3389 | return TK_DependentFunctionTemplateSpecialization; | |||
3390 | ||||
3391 | llvm_unreachable("Did we miss a TemplateOrSpecialization type?")::llvm::llvm_unreachable_internal("Did we miss a TemplateOrSpecialization type?" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3391); | |||
3392 | } | |||
3393 | ||||
3394 | FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const { | |||
3395 | if (MemberSpecializationInfo *Info = getMemberSpecializationInfo()) | |||
3396 | return cast<FunctionDecl>(Info->getInstantiatedFrom()); | |||
3397 | ||||
3398 | return nullptr; | |||
3399 | } | |||
3400 | ||||
3401 | MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const { | |||
3402 | if (auto *MSI = | |||
3403 | TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>()) | |||
3404 | return MSI; | |||
3405 | if (auto *FTSI = TemplateOrSpecialization | |||
3406 | .dyn_cast<FunctionTemplateSpecializationInfo *>()) | |||
3407 | return FTSI->getMemberSpecializationInfo(); | |||
3408 | return nullptr; | |||
3409 | } | |||
3410 | ||||
3411 | void | |||
3412 | FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C, | |||
3413 | FunctionDecl *FD, | |||
3414 | TemplateSpecializationKind TSK) { | |||
3415 | assert(TemplateOrSpecialization.isNull() &&((TemplateOrSpecialization.isNull() && "Member function is already a specialization" ) ? static_cast<void> (0) : __assert_fail ("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3416, __PRETTY_FUNCTION__)) | |||
3416 | "Member function is already a specialization")((TemplateOrSpecialization.isNull() && "Member function is already a specialization" ) ? static_cast<void> (0) : __assert_fail ("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3416, __PRETTY_FUNCTION__)); | |||
3417 | MemberSpecializationInfo *Info | |||
3418 | = new (C) MemberSpecializationInfo(FD, TSK); | |||
3419 | TemplateOrSpecialization = Info; | |||
3420 | } | |||
3421 | ||||
3422 | FunctionTemplateDecl *FunctionDecl::getDescribedFunctionTemplate() const { | |||
3423 | return TemplateOrSpecialization.dyn_cast<FunctionTemplateDecl *>(); | |||
3424 | } | |||
3425 | ||||
3426 | void FunctionDecl::setDescribedFunctionTemplate(FunctionTemplateDecl *Template) { | |||
3427 | assert(TemplateOrSpecialization.isNull() &&((TemplateOrSpecialization.isNull() && "Member function is already a specialization" ) ? static_cast<void> (0) : __assert_fail ("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3428, __PRETTY_FUNCTION__)) | |||
3428 | "Member function is already a specialization")((TemplateOrSpecialization.isNull() && "Member function is already a specialization" ) ? static_cast<void> (0) : __assert_fail ("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3428, __PRETTY_FUNCTION__)); | |||
3429 | TemplateOrSpecialization = Template; | |||
3430 | } | |||
3431 | ||||
3432 | bool FunctionDecl::isImplicitlyInstantiable() const { | |||
3433 | // If the function is invalid, it can't be implicitly instantiated. | |||
3434 | if (isInvalidDecl()) | |||
3435 | return false; | |||
3436 | ||||
3437 | switch (getTemplateSpecializationKindForInstantiation()) { | |||
3438 | case TSK_Undeclared: | |||
3439 | case TSK_ExplicitInstantiationDefinition: | |||
3440 | case TSK_ExplicitSpecialization: | |||
3441 | return false; | |||
3442 | ||||
3443 | case TSK_ImplicitInstantiation: | |||
3444 | return true; | |||
3445 | ||||
3446 | case TSK_ExplicitInstantiationDeclaration: | |||
3447 | // Handled below. | |||
3448 | break; | |||
3449 | } | |||
3450 | ||||
3451 | // Find the actual template from which we will instantiate. | |||
3452 | const FunctionDecl *PatternDecl = getTemplateInstantiationPattern(); | |||
3453 | bool HasPattern = false; | |||
3454 | if (PatternDecl) | |||
3455 | HasPattern = PatternDecl->hasBody(PatternDecl); | |||
3456 | ||||
3457 | // C++0x [temp.explicit]p9: | |||
3458 | // Except for inline functions, other explicit instantiation declarations | |||
3459 | // have the effect of suppressing the implicit instantiation of the entity | |||
3460 | // to which they refer. | |||
3461 | if (!HasPattern || !PatternDecl) | |||
3462 | return true; | |||
3463 | ||||
3464 | return PatternDecl->isInlined(); | |||
3465 | } | |||
3466 | ||||
3467 | bool FunctionDecl::isTemplateInstantiation() const { | |||
3468 | // FIXME: Remove this, it's not clear what it means. (Which template | |||
3469 | // specialization kind?) | |||
3470 | return clang::isTemplateInstantiation(getTemplateSpecializationKind()); | |||
3471 | } | |||
3472 | ||||
3473 | FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const { | |||
3474 | // If this is a generic lambda call operator specialization, its | |||
3475 | // instantiation pattern is always its primary template's pattern | |||
3476 | // even if its primary template was instantiated from another | |||
3477 | // member template (which happens with nested generic lambdas). | |||
3478 | // Since a lambda's call operator's body is transformed eagerly, | |||
3479 | // we don't have to go hunting for a prototype definition template | |||
3480 | // (i.e. instantiated-from-member-template) to use as an instantiation | |||
3481 | // pattern. | |||
3482 | ||||
3483 | if (isGenericLambdaCallOperatorSpecialization( | |||
3484 | dyn_cast<CXXMethodDecl>(this))) { | |||
3485 | assert(getPrimaryTemplate() && "not a generic lambda call operator?")((getPrimaryTemplate() && "not a generic lambda call operator?" ) ? static_cast<void> (0) : __assert_fail ("getPrimaryTemplate() && \"not a generic lambda call operator?\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3485, __PRETTY_FUNCTION__)); | |||
3486 | return getDefinitionOrSelf(getPrimaryTemplate()->getTemplatedDecl()); | |||
3487 | } | |||
3488 | ||||
3489 | if (MemberSpecializationInfo *Info = getMemberSpecializationInfo()) { | |||
3490 | if (!clang::isTemplateInstantiation(Info->getTemplateSpecializationKind())) | |||
3491 | return nullptr; | |||
3492 | return getDefinitionOrSelf(cast<FunctionDecl>(Info->getInstantiatedFrom())); | |||
3493 | } | |||
3494 | ||||
3495 | if (!clang::isTemplateInstantiation(getTemplateSpecializationKind())) | |||
3496 | return nullptr; | |||
3497 | ||||
3498 | if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) { | |||
3499 | // If we hit a point where the user provided a specialization of this | |||
3500 | // template, we're done looking. | |||
3501 | while (!Primary->isMemberSpecialization()) { | |||
3502 | auto *NewPrimary = Primary->getInstantiatedFromMemberTemplate(); | |||
3503 | if (!NewPrimary) | |||
3504 | break; | |||
3505 | Primary = NewPrimary; | |||
3506 | } | |||
3507 | ||||
3508 | return getDefinitionOrSelf(Primary->getTemplatedDecl()); | |||
3509 | } | |||
3510 | ||||
3511 | return nullptr; | |||
3512 | } | |||
3513 | ||||
3514 | FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const { | |||
3515 | if (FunctionTemplateSpecializationInfo *Info | |||
3516 | = TemplateOrSpecialization | |||
3517 | .dyn_cast<FunctionTemplateSpecializationInfo*>()) { | |||
3518 | return Info->getTemplate(); | |||
3519 | } | |||
3520 | return nullptr; | |||
3521 | } | |||
3522 | ||||
3523 | FunctionTemplateSpecializationInfo * | |||
3524 | FunctionDecl::getTemplateSpecializationInfo() const { | |||
3525 | return TemplateOrSpecialization | |||
3526 | .dyn_cast<FunctionTemplateSpecializationInfo *>(); | |||
3527 | } | |||
3528 | ||||
3529 | const TemplateArgumentList * | |||
3530 | FunctionDecl::getTemplateSpecializationArgs() const { | |||
3531 | if (FunctionTemplateSpecializationInfo *Info | |||
3532 | = TemplateOrSpecialization | |||
3533 | .dyn_cast<FunctionTemplateSpecializationInfo*>()) { | |||
3534 | return Info->TemplateArguments; | |||
3535 | } | |||
3536 | return nullptr; | |||
3537 | } | |||
3538 | ||||
3539 | const ASTTemplateArgumentListInfo * | |||
3540 | FunctionDecl::getTemplateSpecializationArgsAsWritten() const { | |||
3541 | if (FunctionTemplateSpecializationInfo *Info | |||
3542 | = TemplateOrSpecialization | |||
3543 | .dyn_cast<FunctionTemplateSpecializationInfo*>()) { | |||
3544 | return Info->TemplateArgumentsAsWritten; | |||
3545 | } | |||
3546 | return nullptr; | |||
3547 | } | |||
3548 | ||||
3549 | void | |||
3550 | FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C, | |||
3551 | FunctionTemplateDecl *Template, | |||
3552 | const TemplateArgumentList *TemplateArgs, | |||
3553 | void *InsertPos, | |||
3554 | TemplateSpecializationKind TSK, | |||
3555 | const TemplateArgumentListInfo *TemplateArgsAsWritten, | |||
3556 | SourceLocation PointOfInstantiation) { | |||
3557 | assert((TemplateOrSpecialization.isNull() ||(((TemplateOrSpecialization.isNull() || TemplateOrSpecialization .is<MemberSpecializationInfo *>()) && "Member function is already a specialization" ) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TemplateOrSpecialization.is<MemberSpecializationInfo *>()) && \"Member function is already a specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3559, __PRETTY_FUNCTION__)) | |||
3558 | TemplateOrSpecialization.is<MemberSpecializationInfo *>()) &&(((TemplateOrSpecialization.isNull() || TemplateOrSpecialization .is<MemberSpecializationInfo *>()) && "Member function is already a specialization" ) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TemplateOrSpecialization.is<MemberSpecializationInfo *>()) && \"Member function is already a specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3559, __PRETTY_FUNCTION__)) | |||
3559 | "Member function is already a specialization")(((TemplateOrSpecialization.isNull() || TemplateOrSpecialization .is<MemberSpecializationInfo *>()) && "Member function is already a specialization" ) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TemplateOrSpecialization.is<MemberSpecializationInfo *>()) && \"Member function is already a specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3559, __PRETTY_FUNCTION__)); | |||
3560 | assert(TSK != TSK_Undeclared &&((TSK != TSK_Undeclared && "Must specify the type of function template specialization" ) ? static_cast<void> (0) : __assert_fail ("TSK != TSK_Undeclared && \"Must specify the type of function template specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3561, __PRETTY_FUNCTION__)) | |||
3561 | "Must specify the type of function template specialization")((TSK != TSK_Undeclared && "Must specify the type of function template specialization" ) ? static_cast<void> (0) : __assert_fail ("TSK != TSK_Undeclared && \"Must specify the type of function template specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3561, __PRETTY_FUNCTION__)); | |||
3562 | assert((TemplateOrSpecialization.isNull() ||(((TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization ) && "Member specialization must be an explicit specialization" ) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization) && \"Member specialization must be an explicit specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3564, __PRETTY_FUNCTION__)) | |||
3563 | TSK == TSK_ExplicitSpecialization) &&(((TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization ) && "Member specialization must be an explicit specialization" ) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization) && \"Member specialization must be an explicit specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3564, __PRETTY_FUNCTION__)) | |||
3564 | "Member specialization must be an explicit specialization")(((TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization ) && "Member specialization must be an explicit specialization" ) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization) && \"Member specialization must be an explicit specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3564, __PRETTY_FUNCTION__)); | |||
3565 | FunctionTemplateSpecializationInfo *Info = | |||
3566 | FunctionTemplateSpecializationInfo::Create( | |||
3567 | C, this, Template, TSK, TemplateArgs, TemplateArgsAsWritten, | |||
3568 | PointOfInstantiation, | |||
3569 | TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>()); | |||
3570 | TemplateOrSpecialization = Info; | |||
3571 | Template->addSpecialization(Info, InsertPos); | |||
3572 | } | |||
3573 | ||||
3574 | void | |||
3575 | FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context, | |||
3576 | const UnresolvedSetImpl &Templates, | |||
3577 | const TemplateArgumentListInfo &TemplateArgs) { | |||
3578 | assert(TemplateOrSpecialization.isNull())((TemplateOrSpecialization.isNull()) ? static_cast<void> (0) : __assert_fail ("TemplateOrSpecialization.isNull()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3578, __PRETTY_FUNCTION__)); | |||
3579 | DependentFunctionTemplateSpecializationInfo *Info = | |||
3580 | DependentFunctionTemplateSpecializationInfo::Create(Context, Templates, | |||
3581 | TemplateArgs); | |||
3582 | TemplateOrSpecialization = Info; | |||
3583 | } | |||
3584 | ||||
3585 | DependentFunctionTemplateSpecializationInfo * | |||
3586 | FunctionDecl::getDependentSpecializationInfo() const { | |||
3587 | return TemplateOrSpecialization | |||
3588 | .dyn_cast<DependentFunctionTemplateSpecializationInfo *>(); | |||
3589 | } | |||
3590 | ||||
3591 | DependentFunctionTemplateSpecializationInfo * | |||
3592 | DependentFunctionTemplateSpecializationInfo::Create( | |||
3593 | ASTContext &Context, const UnresolvedSetImpl &Ts, | |||
3594 | const TemplateArgumentListInfo &TArgs) { | |||
3595 | void *Buffer = Context.Allocate( | |||
3596 | totalSizeToAlloc<TemplateArgumentLoc, FunctionTemplateDecl *>( | |||
3597 | TArgs.size(), Ts.size())); | |||
3598 | return new (Buffer) DependentFunctionTemplateSpecializationInfo(Ts, TArgs); | |||
3599 | } | |||
3600 | ||||
3601 | DependentFunctionTemplateSpecializationInfo:: | |||
3602 | DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts, | |||
3603 | const TemplateArgumentListInfo &TArgs) | |||
3604 | : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) { | |||
3605 | NumTemplates = Ts.size(); | |||
3606 | NumArgs = TArgs.size(); | |||
3607 | ||||
3608 | FunctionTemplateDecl **TsArray = getTrailingObjects<FunctionTemplateDecl *>(); | |||
3609 | for (unsigned I = 0, E = Ts.size(); I != E; ++I) | |||
3610 | TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl()); | |||
3611 | ||||
3612 | TemplateArgumentLoc *ArgsArray = getTrailingObjects<TemplateArgumentLoc>(); | |||
3613 | for (unsigned I = 0, E = TArgs.size(); I != E; ++I) | |||
3614 | new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]); | |||
3615 | } | |||
3616 | ||||
3617 | TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const { | |||
3618 | // For a function template specialization, query the specialization | |||
3619 | // information object. | |||
3620 | if (FunctionTemplateSpecializationInfo *FTSInfo = | |||
3621 | TemplateOrSpecialization | |||
3622 | .dyn_cast<FunctionTemplateSpecializationInfo *>()) | |||
3623 | return FTSInfo->getTemplateSpecializationKind(); | |||
3624 | ||||
3625 | if (MemberSpecializationInfo *MSInfo = | |||
3626 | TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>()) | |||
3627 | return MSInfo->getTemplateSpecializationKind(); | |||
3628 | ||||
3629 | return TSK_Undeclared; | |||
3630 | } | |||
3631 | ||||
3632 | TemplateSpecializationKind | |||
3633 | FunctionDecl::getTemplateSpecializationKindForInstantiation() const { | |||
3634 | // This is the same as getTemplateSpecializationKind(), except that for a | |||
3635 | // function that is both a function template specialization and a member | |||
3636 | // specialization, we prefer the member specialization information. Eg: | |||
3637 | // | |||
3638 | // template<typename T> struct A { | |||
3639 | // template<typename U> void f() {} | |||
3640 | // template<> void f<int>() {} | |||
3641 | // }; | |||
3642 | // | |||
3643 | // For A<int>::f<int>(): | |||
3644 | // * getTemplateSpecializationKind() will return TSK_ExplicitSpecialization | |||
3645 | // * getTemplateSpecializationKindForInstantiation() will return | |||
3646 | // TSK_ImplicitInstantiation | |||
3647 | // | |||
3648 | // This reflects the facts that A<int>::f<int> is an explicit specialization | |||
3649 | // of A<int>::f, and that A<int>::f<int> should be implicitly instantiated | |||
3650 | // from A::f<int> if a definition is needed. | |||
3651 | if (FunctionTemplateSpecializationInfo *FTSInfo = | |||
3652 | TemplateOrSpecialization | |||
3653 | .dyn_cast<FunctionTemplateSpecializationInfo *>()) { | |||
3654 | if (auto *MSInfo = FTSInfo->getMemberSpecializationInfo()) | |||
3655 | return MSInfo->getTemplateSpecializationKind(); | |||
3656 | return FTSInfo->getTemplateSpecializationKind(); | |||
3657 | } | |||
3658 | ||||
3659 | if (MemberSpecializationInfo *MSInfo = | |||
3660 | TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>()) | |||
3661 | return MSInfo->getTemplateSpecializationKind(); | |||
3662 | ||||
3663 | return TSK_Undeclared; | |||
3664 | } | |||
3665 | ||||
3666 | void | |||
3667 | FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, | |||
3668 | SourceLocation PointOfInstantiation) { | |||
3669 | if (FunctionTemplateSpecializationInfo *FTSInfo | |||
3670 | = TemplateOrSpecialization.dyn_cast< | |||
3671 | FunctionTemplateSpecializationInfo*>()) { | |||
3672 | FTSInfo->setTemplateSpecializationKind(TSK); | |||
3673 | if (TSK != TSK_ExplicitSpecialization && | |||
3674 | PointOfInstantiation.isValid() && | |||
3675 | FTSInfo->getPointOfInstantiation().isInvalid()) { | |||
3676 | FTSInfo->setPointOfInstantiation(PointOfInstantiation); | |||
3677 | if (ASTMutationListener *L = getASTContext().getASTMutationListener()) | |||
3678 | L->InstantiationRequested(this); | |||
3679 | } | |||
3680 | } else if (MemberSpecializationInfo *MSInfo | |||
3681 | = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) { | |||
3682 | MSInfo->setTemplateSpecializationKind(TSK); | |||
3683 | if (TSK != TSK_ExplicitSpecialization && | |||
3684 | PointOfInstantiation.isValid() && | |||
3685 | MSInfo->getPointOfInstantiation().isInvalid()) { | |||
3686 | MSInfo->setPointOfInstantiation(PointOfInstantiation); | |||
3687 | if (ASTMutationListener *L = getASTContext().getASTMutationListener()) | |||
3688 | L->InstantiationRequested(this); | |||
3689 | } | |||
3690 | } else | |||
3691 | llvm_unreachable("Function cannot have a template specialization kind")::llvm::llvm_unreachable_internal("Function cannot have a template specialization kind" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3691); | |||
3692 | } | |||
3693 | ||||
3694 | SourceLocation FunctionDecl::getPointOfInstantiation() const { | |||
3695 | if (FunctionTemplateSpecializationInfo *FTSInfo | |||
3696 | = TemplateOrSpecialization.dyn_cast< | |||
3697 | FunctionTemplateSpecializationInfo*>()) | |||
3698 | return FTSInfo->getPointOfInstantiation(); | |||
3699 | else if (MemberSpecializationInfo *MSInfo | |||
3700 | = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) | |||
3701 | return MSInfo->getPointOfInstantiation(); | |||
3702 | ||||
3703 | return SourceLocation(); | |||
3704 | } | |||
3705 | ||||
3706 | bool FunctionDecl::isOutOfLine() const { | |||
3707 | if (Decl::isOutOfLine()) | |||
3708 | return true; | |||
3709 | ||||
3710 | // If this function was instantiated from a member function of a | |||
3711 | // class template, check whether that member function was defined out-of-line. | |||
3712 | if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) { | |||
3713 | const FunctionDecl *Definition; | |||
3714 | if (FD->hasBody(Definition)) | |||
3715 | return Definition->isOutOfLine(); | |||
3716 | } | |||
3717 | ||||
3718 | // If this function was instantiated from a function template, | |||
3719 | // check whether that function template was defined out-of-line. | |||
3720 | if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) { | |||
3721 | const FunctionDecl *Definition; | |||
3722 | if (FunTmpl->getTemplatedDecl()->hasBody(Definition)) | |||
3723 | return Definition->isOutOfLine(); | |||
3724 | } | |||
3725 | ||||
3726 | return false; | |||
3727 | } | |||
3728 | ||||
3729 | SourceRange FunctionDecl::getSourceRange() const { | |||
3730 | return SourceRange(getOuterLocStart(), EndRangeLoc); | |||
3731 | } | |||
3732 | ||||
3733 | unsigned FunctionDecl::getMemoryFunctionKind() const { | |||
3734 | IdentifierInfo *FnInfo = getIdentifier(); | |||
3735 | ||||
3736 | if (!FnInfo) | |||
3737 | return 0; | |||
3738 | ||||
3739 | // Builtin handling. | |||
3740 | switch (getBuiltinID()) { | |||
3741 | case Builtin::BI__builtin_memset: | |||
3742 | case Builtin::BI__builtin___memset_chk: | |||
3743 | case Builtin::BImemset: | |||
3744 | return Builtin::BImemset; | |||
3745 | ||||
3746 | case Builtin::BI__builtin_memcpy: | |||
3747 | case Builtin::BI__builtin___memcpy_chk: | |||
3748 | case Builtin::BImemcpy: | |||
3749 | return Builtin::BImemcpy; | |||
3750 | ||||
3751 | case Builtin::BI__builtin_memmove: | |||
3752 | case Builtin::BI__builtin___memmove_chk: | |||
3753 | case Builtin::BImemmove: | |||
3754 | return Builtin::BImemmove; | |||
3755 | ||||
3756 | // case Builtin::BIstrlcpy: | |||
3757 | // case Builtin::BI__builtin___strlcpy_chk: | |||
3758 | // return Builtin::BIstrlcpy; | |||
3759 | ||||
3760 | // case Builtin::BIstrlcat: | |||
3761 | // case Builtin::BI__builtin___strlcat_chk: | |||
3762 | // return Builtin::BIstrlcat; | |||
3763 | ||||
3764 | case Builtin::BI__builtin_memcmp: | |||
3765 | case Builtin::BImemcmp: | |||
3766 | return Builtin::BImemcmp; | |||
3767 | ||||
3768 | case Builtin::BI__builtin_bcmp: | |||
3769 | case Builtin::BIbcmp: | |||
3770 | return Builtin::BIbcmp; | |||
3771 | ||||
3772 | case Builtin::BI__builtin_strncpy: | |||
3773 | case Builtin::BI__builtin___strncpy_chk: | |||
3774 | case Builtin::BIstrncpy: | |||
3775 | return Builtin::BIstrncpy; | |||
3776 | ||||
3777 | case Builtin::BI__builtin_strncmp: | |||
3778 | case Builtin::BIstrncmp: | |||
3779 | return Builtin::BIstrncmp; | |||
3780 | ||||
3781 | case Builtin::BI__builtin_strncasecmp: | |||
3782 | case Builtin::BIstrncasecmp: | |||
3783 | return Builtin::BIstrncasecmp; | |||
3784 | ||||
3785 | case Builtin::BI__builtin_strncat: | |||
3786 | case Builtin::BI__builtin___strncat_chk: | |||
3787 | case Builtin::BIstrncat: | |||
3788 | return Builtin::BIstrncat; | |||
3789 | ||||
3790 | case Builtin::BI__builtin_strndup: | |||
3791 | case Builtin::BIstrndup: | |||
3792 | return Builtin::BIstrndup; | |||
3793 | ||||
3794 | case Builtin::BI__builtin_strlen: | |||
3795 | case Builtin::BIstrlen: | |||
3796 | return Builtin::BIstrlen; | |||
3797 | ||||
3798 | case Builtin::BI__builtin_bzero: | |||
3799 | case Builtin::BIbzero: | |||
3800 | return Builtin::BIbzero; | |||
3801 | ||||
3802 | default: | |||
3803 | if (isExternC()) { | |||
3804 | if (FnInfo->isStr("memset")) | |||
3805 | return Builtin::BImemset; | |||
3806 | else if (FnInfo->isStr("memcpy")) | |||
3807 | return Builtin::BImemcpy; | |||
3808 | else if (FnInfo->isStr("memmove")) | |||
3809 | return Builtin::BImemmove; | |||
3810 | else if (FnInfo->isStr("memcmp")) | |||
3811 | return Builtin::BImemcmp; | |||
3812 | else if (FnInfo->isStr("bcmp")) | |||
3813 | return Builtin::BIbcmp; | |||
3814 | else if (FnInfo->isStr("strncpy")) | |||
3815 | return Builtin::BIstrncpy; | |||
3816 | else if (FnInfo->isStr("strncmp")) | |||
3817 | return Builtin::BIstrncmp; | |||
3818 | else if (FnInfo->isStr("strncasecmp")) | |||
3819 | return Builtin::BIstrncasecmp; | |||
3820 | else if (FnInfo->isStr("strncat")) | |||
3821 | return Builtin::BIstrncat; | |||
3822 | else if (FnInfo->isStr("strndup")) | |||
3823 | return Builtin::BIstrndup; | |||
3824 | else if (FnInfo->isStr("strlen")) | |||
3825 | return Builtin::BIstrlen; | |||
3826 | else if (FnInfo->isStr("bzero")) | |||
3827 | return Builtin::BIbzero; | |||
3828 | } | |||
3829 | break; | |||
3830 | } | |||
3831 | return 0; | |||
3832 | } | |||
3833 | ||||
3834 | unsigned FunctionDecl::getODRHash() const { | |||
3835 | assert(hasODRHash())((hasODRHash()) ? static_cast<void> (0) : __assert_fail ("hasODRHash()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3835, __PRETTY_FUNCTION__)); | |||
3836 | return ODRHash; | |||
3837 | } | |||
3838 | ||||
3839 | unsigned FunctionDecl::getODRHash() { | |||
3840 | if (hasODRHash()) | |||
3841 | return ODRHash; | |||
3842 | ||||
3843 | if (auto *FT = getInstantiatedFromMemberFunction()) { | |||
3844 | setHasODRHash(true); | |||
3845 | ODRHash = FT->getODRHash(); | |||
3846 | return ODRHash; | |||
3847 | } | |||
3848 | ||||
3849 | class ODRHash Hash; | |||
3850 | Hash.AddFunctionDecl(this); | |||
3851 | setHasODRHash(true); | |||
3852 | ODRHash = Hash.CalculateHash(); | |||
3853 | return ODRHash; | |||
3854 | } | |||
3855 | ||||
3856 | //===----------------------------------------------------------------------===// | |||
3857 | // FieldDecl Implementation | |||
3858 | //===----------------------------------------------------------------------===// | |||
3859 | ||||
3860 | FieldDecl *FieldDecl::Create(const ASTContext &C, DeclContext *DC, | |||
3861 | SourceLocation StartLoc, SourceLocation IdLoc, | |||
3862 | IdentifierInfo *Id, QualType T, | |||
3863 | TypeSourceInfo *TInfo, Expr *BW, bool Mutable, | |||
3864 | InClassInitStyle InitStyle) { | |||
3865 | return new (C, DC) FieldDecl(Decl::Field, DC, StartLoc, IdLoc, Id, T, TInfo, | |||
3866 | BW, Mutable, InitStyle); | |||
3867 | } | |||
3868 | ||||
3869 | FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
3870 | return new (C, ID) FieldDecl(Field, nullptr, SourceLocation(), | |||
3871 | SourceLocation(), nullptr, QualType(), nullptr, | |||
3872 | nullptr, false, ICIS_NoInit); | |||
3873 | } | |||
3874 | ||||
3875 | bool FieldDecl::isAnonymousStructOrUnion() const { | |||
3876 | if (!isImplicit() || getDeclName()) | |||
3877 | return false; | |||
3878 | ||||
3879 | if (const auto *Record = getType()->getAs<RecordType>()) | |||
3880 | return Record->getDecl()->isAnonymousStructOrUnion(); | |||
3881 | ||||
3882 | return false; | |||
3883 | } | |||
3884 | ||||
3885 | unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const { | |||
3886 | assert(isBitField() && "not a bitfield")((isBitField() && "not a bitfield") ? static_cast< void> (0) : __assert_fail ("isBitField() && \"not a bitfield\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3886, __PRETTY_FUNCTION__)); | |||
3887 | return getBitWidth()->EvaluateKnownConstInt(Ctx).getZExtValue(); | |||
3888 | } | |||
3889 | ||||
3890 | bool FieldDecl::isZeroLengthBitField(const ASTContext &Ctx) const { | |||
3891 | return isUnnamedBitfield() && !getBitWidth()->isValueDependent() && | |||
3892 | getBitWidthValue(Ctx) == 0; | |||
3893 | } | |||
3894 | ||||
3895 | unsigned FieldDecl::getFieldIndex() const { | |||
3896 | const FieldDecl *Canonical = getCanonicalDecl(); | |||
3897 | if (Canonical != this) | |||
3898 | return Canonical->getFieldIndex(); | |||
3899 | ||||
3900 | if (CachedFieldIndex) return CachedFieldIndex - 1; | |||
3901 | ||||
3902 | unsigned Index = 0; | |||
3903 | const RecordDecl *RD = getParent()->getDefinition(); | |||
3904 | assert(RD && "requested index for field of struct with no definition")((RD && "requested index for field of struct with no definition" ) ? static_cast<void> (0) : __assert_fail ("RD && \"requested index for field of struct with no definition\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3904, __PRETTY_FUNCTION__)); | |||
3905 | ||||
3906 | for (auto *Field : RD->fields()) { | |||
3907 | Field->getCanonicalDecl()->CachedFieldIndex = Index + 1; | |||
3908 | ++Index; | |||
3909 | } | |||
3910 | ||||
3911 | assert(CachedFieldIndex && "failed to find field in parent")((CachedFieldIndex && "failed to find field in parent" ) ? static_cast<void> (0) : __assert_fail ("CachedFieldIndex && \"failed to find field in parent\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3911, __PRETTY_FUNCTION__)); | |||
3912 | return CachedFieldIndex - 1; | |||
3913 | } | |||
3914 | ||||
3915 | SourceRange FieldDecl::getSourceRange() const { | |||
3916 | const Expr *FinalExpr = getInClassInitializer(); | |||
3917 | if (!FinalExpr) | |||
3918 | FinalExpr = getBitWidth(); | |||
3919 | if (FinalExpr) | |||
3920 | return SourceRange(getInnerLocStart(), FinalExpr->getEndLoc()); | |||
3921 | return DeclaratorDecl::getSourceRange(); | |||
3922 | } | |||
3923 | ||||
3924 | void FieldDecl::setCapturedVLAType(const VariableArrayType *VLAType) { | |||
3925 | assert((getParent()->isLambda() || getParent()->isCapturedRecord()) &&(((getParent()->isLambda() || getParent()->isCapturedRecord ()) && "capturing type in non-lambda or captured record." ) ? static_cast<void> (0) : __assert_fail ("(getParent()->isLambda() || getParent()->isCapturedRecord()) && \"capturing type in non-lambda or captured record.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3926, __PRETTY_FUNCTION__)) | |||
3926 | "capturing type in non-lambda or captured record.")(((getParent()->isLambda() || getParent()->isCapturedRecord ()) && "capturing type in non-lambda or captured record." ) ? static_cast<void> (0) : __assert_fail ("(getParent()->isLambda() || getParent()->isCapturedRecord()) && \"capturing type in non-lambda or captured record.\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3926, __PRETTY_FUNCTION__)); | |||
3927 | assert(InitStorage.getInt() == ISK_NoInit &&((InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer () == nullptr && "bit width, initializer or captured type already set" ) ? static_cast<void> (0) : __assert_fail ("InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer() == nullptr && \"bit width, initializer or captured type already set\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3929, __PRETTY_FUNCTION__)) | |||
3928 | InitStorage.getPointer() == nullptr &&((InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer () == nullptr && "bit width, initializer or captured type already set" ) ? static_cast<void> (0) : __assert_fail ("InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer() == nullptr && \"bit width, initializer or captured type already set\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3929, __PRETTY_FUNCTION__)) | |||
3929 | "bit width, initializer or captured type already set")((InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer () == nullptr && "bit width, initializer or captured type already set" ) ? static_cast<void> (0) : __assert_fail ("InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer() == nullptr && \"bit width, initializer or captured type already set\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3929, __PRETTY_FUNCTION__)); | |||
3930 | InitStorage.setPointerAndInt(const_cast<VariableArrayType *>(VLAType), | |||
3931 | ISK_CapturedVLAType); | |||
3932 | } | |||
3933 | ||||
3934 | //===----------------------------------------------------------------------===// | |||
3935 | // TagDecl Implementation | |||
3936 | //===----------------------------------------------------------------------===// | |||
3937 | ||||
3938 | TagDecl::TagDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC, | |||
3939 | SourceLocation L, IdentifierInfo *Id, TagDecl *PrevDecl, | |||
3940 | SourceLocation StartL) | |||
3941 | : TypeDecl(DK, DC, L, Id, StartL), DeclContext(DK), redeclarable_base(C), | |||
3942 | TypedefNameDeclOrQualifier((TypedefNameDecl *)nullptr) { | |||
3943 | assert((DK != Enum || TK == TTK_Enum) &&(((DK != Enum || TK == TTK_Enum) && "EnumDecl not matched with TTK_Enum" ) ? static_cast<void> (0) : __assert_fail ("(DK != Enum || TK == TTK_Enum) && \"EnumDecl not matched with TTK_Enum\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3944, __PRETTY_FUNCTION__)) | |||
3944 | "EnumDecl not matched with TTK_Enum")(((DK != Enum || TK == TTK_Enum) && "EnumDecl not matched with TTK_Enum" ) ? static_cast<void> (0) : __assert_fail ("(DK != Enum || TK == TTK_Enum) && \"EnumDecl not matched with TTK_Enum\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3944, __PRETTY_FUNCTION__)); | |||
3945 | setPreviousDecl(PrevDecl); | |||
3946 | setTagKind(TK); | |||
3947 | setCompleteDefinition(false); | |||
3948 | setBeingDefined(false); | |||
3949 | setEmbeddedInDeclarator(false); | |||
3950 | setFreeStanding(false); | |||
3951 | setCompleteDefinitionRequired(false); | |||
3952 | } | |||
3953 | ||||
3954 | SourceLocation TagDecl::getOuterLocStart() const { | |||
3955 | return getTemplateOrInnerLocStart(this); | |||
3956 | } | |||
3957 | ||||
3958 | SourceRange TagDecl::getSourceRange() const { | |||
3959 | SourceLocation RBraceLoc = BraceRange.getEnd(); | |||
3960 | SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation(); | |||
3961 | return SourceRange(getOuterLocStart(), E); | |||
3962 | } | |||
3963 | ||||
3964 | TagDecl *TagDecl::getCanonicalDecl() { return getFirstDecl(); } | |||
3965 | ||||
3966 | void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) { | |||
3967 | TypedefNameDeclOrQualifier = TDD; | |||
3968 | if (const Type *T = getTypeForDecl()) { | |||
3969 | (void)T; | |||
3970 | assert(T->isLinkageValid())((T->isLinkageValid()) ? static_cast<void> (0) : __assert_fail ("T->isLinkageValid()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3970, __PRETTY_FUNCTION__)); | |||
3971 | } | |||
3972 | assert(isLinkageValid())((isLinkageValid()) ? static_cast<void> (0) : __assert_fail ("isLinkageValid()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3972, __PRETTY_FUNCTION__)); | |||
3973 | } | |||
3974 | ||||
3975 | void TagDecl::startDefinition() { | |||
3976 | setBeingDefined(true); | |||
3977 | ||||
3978 | if (auto *D = dyn_cast<CXXRecordDecl>(this)) { | |||
3979 | struct CXXRecordDecl::DefinitionData *Data = | |||
3980 | new (getASTContext()) struct CXXRecordDecl::DefinitionData(D); | |||
3981 | for (auto I : redecls()) | |||
3982 | cast<CXXRecordDecl>(I)->DefinitionData = Data; | |||
3983 | } | |||
3984 | } | |||
3985 | ||||
3986 | void TagDecl::completeDefinition() { | |||
3987 | assert((!isa<CXXRecordDecl>(this) ||(((!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl> (this)->hasDefinition()) && "definition completed but not started" ) ? static_cast<void> (0) : __assert_fail ("(!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>(this)->hasDefinition()) && \"definition completed but not started\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3989, __PRETTY_FUNCTION__)) | |||
3988 | cast<CXXRecordDecl>(this)->hasDefinition()) &&(((!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl> (this)->hasDefinition()) && "definition completed but not started" ) ? static_cast<void> (0) : __assert_fail ("(!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>(this)->hasDefinition()) && \"definition completed but not started\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3989, __PRETTY_FUNCTION__)) | |||
3989 | "definition completed but not started")(((!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl> (this)->hasDefinition()) && "definition completed but not started" ) ? static_cast<void> (0) : __assert_fail ("(!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>(this)->hasDefinition()) && \"definition completed but not started\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 3989, __PRETTY_FUNCTION__)); | |||
3990 | ||||
3991 | setCompleteDefinition(true); | |||
3992 | setBeingDefined(false); | |||
3993 | ||||
3994 | if (ASTMutationListener *L = getASTMutationListener()) | |||
3995 | L->CompletedTagDefinition(this); | |||
3996 | } | |||
3997 | ||||
3998 | TagDecl *TagDecl::getDefinition() const { | |||
3999 | if (isCompleteDefinition()) | |||
4000 | return const_cast<TagDecl *>(this); | |||
4001 | ||||
4002 | // If it's possible for us to have an out-of-date definition, check now. | |||
4003 | if (mayHaveOutOfDateDef()) { | |||
4004 | if (IdentifierInfo *II = getIdentifier()) { | |||
4005 | if (II->isOutOfDate()) { | |||
4006 | updateOutOfDate(*II); | |||
4007 | } | |||
4008 | } | |||
4009 | } | |||
4010 | ||||
4011 | if (const auto *CXXRD = dyn_cast<CXXRecordDecl>(this)) | |||
4012 | return CXXRD->getDefinition(); | |||
4013 | ||||
4014 | for (auto R : redecls()) | |||
4015 | if (R->isCompleteDefinition()) | |||
4016 | return R; | |||
4017 | ||||
4018 | return nullptr; | |||
4019 | } | |||
4020 | ||||
4021 | void TagDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) { | |||
4022 | if (QualifierLoc) { | |||
4023 | // Make sure the extended qualifier info is allocated. | |||
4024 | if (!hasExtInfo()) | |||
4025 | TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo; | |||
4026 | // Set qualifier info. | |||
4027 | getExtInfo()->QualifierLoc = QualifierLoc; | |||
4028 | } else { | |||
4029 | // Here Qualifier == 0, i.e., we are removing the qualifier (if any). | |||
4030 | if (hasExtInfo()) { | |||
4031 | if (getExtInfo()->NumTemplParamLists == 0) { | |||
4032 | getASTContext().Deallocate(getExtInfo()); | |||
4033 | TypedefNameDeclOrQualifier = (TypedefNameDecl *)nullptr; | |||
4034 | } | |||
4035 | else | |||
4036 | getExtInfo()->QualifierLoc = QualifierLoc; | |||
4037 | } | |||
4038 | } | |||
4039 | } | |||
4040 | ||||
4041 | void TagDecl::setTemplateParameterListsInfo( | |||
4042 | ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) { | |||
4043 | assert(!TPLists.empty())((!TPLists.empty()) ? static_cast<void> (0) : __assert_fail ("!TPLists.empty()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4043, __PRETTY_FUNCTION__)); | |||
4044 | // Make sure the extended decl info is allocated. | |||
4045 | if (!hasExtInfo()) | |||
4046 | // Allocate external info struct. | |||
4047 | TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo; | |||
4048 | // Set the template parameter lists info. | |||
4049 | getExtInfo()->setTemplateParameterListsInfo(Context, TPLists); | |||
4050 | } | |||
4051 | ||||
4052 | //===----------------------------------------------------------------------===// | |||
4053 | // EnumDecl Implementation | |||
4054 | //===----------------------------------------------------------------------===// | |||
4055 | ||||
4056 | EnumDecl::EnumDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, | |||
4057 | SourceLocation IdLoc, IdentifierInfo *Id, EnumDecl *PrevDecl, | |||
4058 | bool Scoped, bool ScopedUsingClassTag, bool Fixed) | |||
4059 | : TagDecl(Enum, TTK_Enum, C, DC, IdLoc, Id, PrevDecl, StartLoc) { | |||
4060 | assert(Scoped || !ScopedUsingClassTag)((Scoped || !ScopedUsingClassTag) ? static_cast<void> ( 0) : __assert_fail ("Scoped || !ScopedUsingClassTag", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4060, __PRETTY_FUNCTION__)); | |||
4061 | IntegerType = nullptr; | |||
4062 | setNumPositiveBits(0); | |||
4063 | setNumNegativeBits(0); | |||
4064 | setScoped(Scoped); | |||
4065 | setScopedUsingClassTag(ScopedUsingClassTag); | |||
4066 | setFixed(Fixed); | |||
4067 | setHasODRHash(false); | |||
4068 | ODRHash = 0; | |||
4069 | } | |||
4070 | ||||
4071 | void EnumDecl::anchor() {} | |||
4072 | ||||
4073 | EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC, | |||
4074 | SourceLocation StartLoc, SourceLocation IdLoc, | |||
4075 | IdentifierInfo *Id, | |||
4076 | EnumDecl *PrevDecl, bool IsScoped, | |||
4077 | bool IsScopedUsingClassTag, bool IsFixed) { | |||
4078 | auto *Enum = new (C, DC) EnumDecl(C, DC, StartLoc, IdLoc, Id, PrevDecl, | |||
4079 | IsScoped, IsScopedUsingClassTag, IsFixed); | |||
4080 | Enum->setMayHaveOutOfDateDef(C.getLangOpts().Modules); | |||
4081 | C.getTypeDeclType(Enum, PrevDecl); | |||
4082 | return Enum; | |||
4083 | } | |||
4084 | ||||
4085 | EnumDecl *EnumDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
4086 | EnumDecl *Enum = | |||
4087 | new (C, ID) EnumDecl(C, nullptr, SourceLocation(), SourceLocation(), | |||
4088 | nullptr, nullptr, false, false, false); | |||
4089 | Enum->setMayHaveOutOfDateDef(C.getLangOpts().Modules); | |||
4090 | return Enum; | |||
4091 | } | |||
4092 | ||||
4093 | SourceRange EnumDecl::getIntegerTypeRange() const { | |||
4094 | if (const TypeSourceInfo *TI = getIntegerTypeSourceInfo()) | |||
4095 | return TI->getTypeLoc().getSourceRange(); | |||
4096 | return SourceRange(); | |||
4097 | } | |||
4098 | ||||
4099 | void EnumDecl::completeDefinition(QualType NewType, | |||
4100 | QualType NewPromotionType, | |||
4101 | unsigned NumPositiveBits, | |||
4102 | unsigned NumNegativeBits) { | |||
4103 | assert(!isCompleteDefinition() && "Cannot redefine enums!")((!isCompleteDefinition() && "Cannot redefine enums!" ) ? static_cast<void> (0) : __assert_fail ("!isCompleteDefinition() && \"Cannot redefine enums!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4103, __PRETTY_FUNCTION__)); | |||
4104 | if (!IntegerType) | |||
4105 | IntegerType = NewType.getTypePtr(); | |||
4106 | PromotionType = NewPromotionType; | |||
4107 | setNumPositiveBits(NumPositiveBits); | |||
4108 | setNumNegativeBits(NumNegativeBits); | |||
4109 | TagDecl::completeDefinition(); | |||
4110 | } | |||
4111 | ||||
4112 | bool EnumDecl::isClosed() const { | |||
4113 | if (const auto *A = getAttr<EnumExtensibilityAttr>()) | |||
4114 | return A->getExtensibility() == EnumExtensibilityAttr::Closed; | |||
4115 | return true; | |||
4116 | } | |||
4117 | ||||
4118 | bool EnumDecl::isClosedFlag() const { | |||
4119 | return isClosed() && hasAttr<FlagEnumAttr>(); | |||
4120 | } | |||
4121 | ||||
4122 | bool EnumDecl::isClosedNonFlag() const { | |||
4123 | return isClosed() && !hasAttr<FlagEnumAttr>(); | |||
4124 | } | |||
4125 | ||||
4126 | TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const { | |||
4127 | if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) | |||
4128 | return MSI->getTemplateSpecializationKind(); | |||
4129 | ||||
4130 | return TSK_Undeclared; | |||
4131 | } | |||
4132 | ||||
4133 | void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, | |||
4134 | SourceLocation PointOfInstantiation) { | |||
4135 | MemberSpecializationInfo *MSI = getMemberSpecializationInfo(); | |||
4136 | assert(MSI && "Not an instantiated member enumeration?")((MSI && "Not an instantiated member enumeration?") ? static_cast<void> (0) : __assert_fail ("MSI && \"Not an instantiated member enumeration?\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4136, __PRETTY_FUNCTION__)); | |||
4137 | MSI->setTemplateSpecializationKind(TSK); | |||
4138 | if (TSK != TSK_ExplicitSpecialization && | |||
4139 | PointOfInstantiation.isValid() && | |||
4140 | MSI->getPointOfInstantiation().isInvalid()) | |||
4141 | MSI->setPointOfInstantiation(PointOfInstantiation); | |||
4142 | } | |||
4143 | ||||
4144 | EnumDecl *EnumDecl::getTemplateInstantiationPattern() const { | |||
4145 | if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) { | |||
4146 | if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) { | |||
4147 | EnumDecl *ED = getInstantiatedFromMemberEnum(); | |||
4148 | while (auto *NewED = ED->getInstantiatedFromMemberEnum()) | |||
4149 | ED = NewED; | |||
4150 | return getDefinitionOrSelf(ED); | |||
4151 | } | |||
4152 | } | |||
4153 | ||||
4154 | assert(!isTemplateInstantiation(getTemplateSpecializationKind()) &&((!isTemplateInstantiation(getTemplateSpecializationKind()) && "couldn't find pattern for enum instantiation") ? static_cast <void> (0) : __assert_fail ("!isTemplateInstantiation(getTemplateSpecializationKind()) && \"couldn't find pattern for enum instantiation\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4155, __PRETTY_FUNCTION__)) | |||
4155 | "couldn't find pattern for enum instantiation")((!isTemplateInstantiation(getTemplateSpecializationKind()) && "couldn't find pattern for enum instantiation") ? static_cast <void> (0) : __assert_fail ("!isTemplateInstantiation(getTemplateSpecializationKind()) && \"couldn't find pattern for enum instantiation\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4155, __PRETTY_FUNCTION__)); | |||
4156 | return nullptr; | |||
4157 | } | |||
4158 | ||||
4159 | EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const { | |||
4160 | if (SpecializationInfo) | |||
4161 | return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom()); | |||
4162 | ||||
4163 | return nullptr; | |||
4164 | } | |||
4165 | ||||
4166 | void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED, | |||
4167 | TemplateSpecializationKind TSK) { | |||
4168 | assert(!SpecializationInfo && "Member enum is already a specialization")((!SpecializationInfo && "Member enum is already a specialization" ) ? static_cast<void> (0) : __assert_fail ("!SpecializationInfo && \"Member enum is already a specialization\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4168, __PRETTY_FUNCTION__)); | |||
4169 | SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK); | |||
4170 | } | |||
4171 | ||||
4172 | unsigned EnumDecl::getODRHash() { | |||
4173 | if (hasODRHash()) | |||
4174 | return ODRHash; | |||
4175 | ||||
4176 | class ODRHash Hash; | |||
4177 | Hash.AddEnumDecl(this); | |||
4178 | setHasODRHash(true); | |||
4179 | ODRHash = Hash.CalculateHash(); | |||
4180 | return ODRHash; | |||
4181 | } | |||
4182 | ||||
4183 | //===----------------------------------------------------------------------===// | |||
4184 | // RecordDecl Implementation | |||
4185 | //===----------------------------------------------------------------------===// | |||
4186 | ||||
4187 | RecordDecl::RecordDecl(Kind DK, TagKind TK, const ASTContext &C, | |||
4188 | DeclContext *DC, SourceLocation StartLoc, | |||
4189 | SourceLocation IdLoc, IdentifierInfo *Id, | |||
4190 | RecordDecl *PrevDecl) | |||
4191 | : TagDecl(DK, TK, C, DC, IdLoc, Id, PrevDecl, StartLoc) { | |||
4192 | assert(classof(static_cast<Decl *>(this)) && "Invalid Kind!")((classof(static_cast<Decl *>(this)) && "Invalid Kind!" ) ? static_cast<void> (0) : __assert_fail ("classof(static_cast<Decl *>(this)) && \"Invalid Kind!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4192, __PRETTY_FUNCTION__)); | |||
4193 | setHasFlexibleArrayMember(false); | |||
4194 | setAnonymousStructOrUnion(false); | |||
4195 | setHasObjectMember(false); | |||
4196 | setHasVolatileMember(false); | |||
4197 | setHasLoadedFieldsFromExternalStorage(false); | |||
4198 | setNonTrivialToPrimitiveDefaultInitialize(false); | |||
4199 | setNonTrivialToPrimitiveCopy(false); | |||
4200 | setNonTrivialToPrimitiveDestroy(false); | |||
4201 | setParamDestroyedInCallee(false); | |||
4202 | setArgPassingRestrictions(APK_CanPassInRegs); | |||
4203 | } | |||
4204 | ||||
4205 | RecordDecl *RecordDecl::Create(const ASTContext &C, TagKind TK, DeclContext *DC, | |||
4206 | SourceLocation StartLoc, SourceLocation IdLoc, | |||
4207 | IdentifierInfo *Id, RecordDecl* PrevDecl) { | |||
4208 | RecordDecl *R = new (C, DC) RecordDecl(Record, TK, C, DC, | |||
4209 | StartLoc, IdLoc, Id, PrevDecl); | |||
4210 | R->setMayHaveOutOfDateDef(C.getLangOpts().Modules); | |||
4211 | ||||
4212 | C.getTypeDeclType(R, PrevDecl); | |||
4213 | return R; | |||
4214 | } | |||
4215 | ||||
4216 | RecordDecl *RecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) { | |||
4217 | RecordDecl *R = | |||
4218 | new (C, ID) RecordDecl(Record, TTK_Struct, C, nullptr, SourceLocation(), | |||
4219 | SourceLocation(), nullptr, nullptr); | |||
4220 | R->setMayHaveOutOfDateDef(C.getLangOpts().Modules); | |||
4221 | return R; | |||
4222 | } | |||
4223 | ||||
4224 | bool RecordDecl::isInjectedClassName() const { | |||
4225 | return isImplicit() && getDeclName() && getDeclContext()->isRecord() && | |||
4226 | cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName(); | |||
4227 | } | |||
4228 | ||||
4229 | bool RecordDecl::isLambda() const { | |||
4230 | if (auto RD = dyn_cast<CXXRecordDecl>(this)) | |||
4231 | return RD->isLambda(); | |||
4232 | return false; | |||
4233 | } | |||
4234 | ||||
4235 | bool RecordDecl::isCapturedRecord() const { | |||
4236 | return hasAttr<CapturedRecordAttr>(); | |||
4237 | } | |||
4238 | ||||
4239 | void RecordDecl::setCapturedRecord() { | |||
4240 | addAttr(CapturedRecordAttr::CreateImplicit(getASTContext())); | |||
4241 | } | |||
4242 | ||||
4243 | RecordDecl::field_iterator RecordDecl::field_begin() const { | |||
4244 | if (hasExternalLexicalStorage() && !hasLoadedFieldsFromExternalStorage()) | |||
4245 | LoadFieldsFromExternalStorage(); | |||
4246 | ||||
4247 | return field_iterator(decl_iterator(FirstDecl)); | |||
4248 | } | |||
4249 | ||||
4250 | /// completeDefinition - Notes that the definition of this type is now | |||
4251 | /// complete. | |||
4252 | void RecordDecl::completeDefinition() { | |||
4253 | assert(!isCompleteDefinition() && "Cannot redefine record!")((!isCompleteDefinition() && "Cannot redefine record!" ) ? static_cast<void> (0) : __assert_fail ("!isCompleteDefinition() && \"Cannot redefine record!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4253, __PRETTY_FUNCTION__)); | |||
4254 | TagDecl::completeDefinition(); | |||
4255 | } | |||
4256 | ||||
4257 | /// isMsStruct - Get whether or not this record uses ms_struct layout. | |||
4258 | /// This which can be turned on with an attribute, pragma, or the | |||
4259 | /// -mms-bitfields command-line option. | |||
4260 | bool RecordDecl::isMsStruct(const ASTContext &C) const { | |||
4261 | return hasAttr<MSStructAttr>() || C.getLangOpts().MSBitfields == 1; | |||
4262 | } | |||
4263 | ||||
4264 | void RecordDecl::LoadFieldsFromExternalStorage() const { | |||
4265 | ExternalASTSource *Source = getASTContext().getExternalSource(); | |||
4266 | assert(hasExternalLexicalStorage() && Source && "No external storage?")((hasExternalLexicalStorage() && Source && "No external storage?" ) ? static_cast<void> (0) : __assert_fail ("hasExternalLexicalStorage() && Source && \"No external storage?\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4266, __PRETTY_FUNCTION__)); | |||
4267 | ||||
4268 | // Notify that we have a RecordDecl doing some initialization. | |||
4269 | ExternalASTSource::Deserializing TheFields(Source); | |||
4270 | ||||
4271 | SmallVector<Decl*, 64> Decls; | |||
4272 | setHasLoadedFieldsFromExternalStorage(true); | |||
4273 | Source->FindExternalLexicalDecls(this, [](Decl::Kind K) { | |||
4274 | return FieldDecl::classofKind(K) || IndirectFieldDecl::classofKind(K); | |||
4275 | }, Decls); | |||
4276 | ||||
4277 | #ifndef NDEBUG | |||
4278 | // Check that all decls we got were FieldDecls. | |||
4279 | for (unsigned i=0, e=Decls.size(); i != e; ++i) | |||
4280 | assert(isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl>(Decls[i]))((isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl> (Decls[i])) ? static_cast<void> (0) : __assert_fail ("isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl>(Decls[i])" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4280, __PRETTY_FUNCTION__)); | |||
4281 | #endif | |||
4282 | ||||
4283 | if (Decls.empty()) | |||
4284 | return; | |||
4285 | ||||
4286 | std::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls, | |||
4287 | /*FieldsAlreadyLoaded=*/false); | |||
4288 | } | |||
4289 | ||||
4290 | bool RecordDecl::mayInsertExtraPadding(bool EmitRemark) const { | |||
4291 | ASTContext &Context = getASTContext(); | |||
4292 | const SanitizerMask EnabledAsanMask = Context.getLangOpts().Sanitize.Mask & | |||
4293 | (SanitizerKind::Address | SanitizerKind::KernelAddress); | |||
4294 | if (!EnabledAsanMask || !Context.getLangOpts().SanitizeAddressFieldPadding) | |||
4295 | return false; | |||
4296 | const auto &Blacklist = Context.getSanitizerBlacklist(); | |||
4297 | const auto *CXXRD = dyn_cast<CXXRecordDecl>(this); | |||
4298 | // We may be able to relax some of these requirements. | |||
4299 | int ReasonToReject = -1; | |||
4300 | if (!CXXRD || CXXRD->isExternCContext()) | |||
4301 | ReasonToReject = 0; // is not C++. | |||
4302 | else if (CXXRD->hasAttr<PackedAttr>()) | |||
4303 | ReasonToReject = 1; // is packed. | |||
4304 | else if (CXXRD->isUnion()) | |||
4305 | ReasonToReject = 2; // is a union. | |||
4306 | else if (CXXRD->isTriviallyCopyable()) | |||
4307 | ReasonToReject = 3; // is trivially copyable. | |||
4308 | else if (CXXRD->hasTrivialDestructor()) | |||
4309 | ReasonToReject = 4; // has trivial destructor. | |||
4310 | else if (CXXRD->isStandardLayout()) | |||
4311 | ReasonToReject = 5; // is standard layout. | |||
4312 | else if (Blacklist.isBlacklistedLocation(EnabledAsanMask, getLocation(), | |||
4313 | "field-padding")) | |||
4314 | ReasonToReject = 6; // is in a blacklisted file. | |||
4315 | else if (Blacklist.isBlacklistedType(EnabledAsanMask, | |||
4316 | getQualifiedNameAsString(), | |||
4317 | "field-padding")) | |||
4318 | ReasonToReject = 7; // is blacklisted. | |||
4319 | ||||
4320 | if (EmitRemark) { | |||
4321 | if (ReasonToReject >= 0) | |||
4322 | Context.getDiagnostics().Report( | |||
4323 | getLocation(), | |||
4324 | diag::remark_sanitize_address_insert_extra_padding_rejected) | |||
4325 | << getQualifiedNameAsString() << ReasonToReject; | |||
4326 | else | |||
4327 | Context.getDiagnostics().Report( | |||
4328 | getLocation(), | |||
4329 | diag::remark_sanitize_address_insert_extra_padding_accepted) | |||
4330 | << getQualifiedNameAsString(); | |||
4331 | } | |||
4332 | return ReasonToReject < 0; | |||
4333 | } | |||
4334 | ||||
4335 | const FieldDecl *RecordDecl::findFirstNamedDataMember() const { | |||
4336 | for (const auto *I : fields()) { | |||
4337 | if (I->getIdentifier()) | |||
4338 | return I; | |||
4339 | ||||
4340 | if (const auto *RT = I->getType()->getAs<RecordType>()) | |||
4341 | if (const FieldDecl *NamedDataMember = | |||
4342 | RT->getDecl()->findFirstNamedDataMember()) | |||
4343 | return NamedDataMember; | |||
4344 | } | |||
4345 | ||||
4346 | // We didn't find a named data member. | |||
4347 | return nullptr; | |||
4348 | } | |||
4349 | ||||
4350 | //===----------------------------------------------------------------------===// | |||
4351 | // BlockDecl Implementation | |||
4352 | //===----------------------------------------------------------------------===// | |||
4353 | ||||
4354 | BlockDecl::BlockDecl(DeclContext *DC, SourceLocation CaretLoc) | |||
4355 | : Decl(Block, DC, CaretLoc), DeclContext(Block) { | |||
4356 | setIsVariadic(false); | |||
4357 | setCapturesCXXThis(false); | |||
4358 | setBlockMissingReturnType(true); | |||
4359 | setIsConversionFromLambda(false); | |||
4360 | setDoesNotEscape(false); | |||
4361 | setCanAvoidCopyToHeap(false); | |||
4362 | } | |||
4363 | ||||
4364 | void BlockDecl::setParams(ArrayRef<ParmVarDecl *> NewParamInfo) { | |||
4365 | assert(!ParamInfo && "Already has param info!")((!ParamInfo && "Already has param info!") ? static_cast <void> (0) : __assert_fail ("!ParamInfo && \"Already has param info!\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4365, __PRETTY_FUNCTION__)); | |||
4366 | ||||
4367 | // Zero params -> null pointer. | |||
4368 | if (!NewParamInfo.empty()) { | |||
4369 | NumParams = NewParamInfo.size(); | |||
4370 | ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()]; | |||
4371 | std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo); | |||
4372 | } | |||
4373 | } | |||
4374 | ||||
4375 | void BlockDecl::setCaptures(ASTContext &Context, ArrayRef<Capture> Captures, | |||
4376 | bool CapturesCXXThis) { | |||
4377 | this->setCapturesCXXThis(CapturesCXXThis); | |||
4378 | this->NumCaptures = Captures.size(); | |||
4379 | ||||
4380 | if (Captures.empty()) { | |||
4381 | this->Captures = nullptr; | |||
4382 | return; | |||
4383 | } | |||
4384 | ||||
4385 | this->Captures = Captures.copy(Context).data(); | |||
4386 | } | |||
4387 | ||||
4388 | bool BlockDecl::capturesVariable(const VarDecl *variable) const { | |||
4389 | for (const auto &I : captures()) | |||
4390 | // Only auto vars can be captured, so no redeclaration worries. | |||
4391 | if (I.getVariable() == variable) | |||
4392 | return true; | |||
4393 | ||||
4394 | return false; | |||
4395 | } | |||
4396 | ||||
4397 | SourceRange BlockDecl::getSourceRange() const { | |||
4398 | return SourceRange(getLocation(), Body ? Body->getEndLoc() : getLocation()); | |||
4399 | } | |||
4400 | ||||
4401 | //===----------------------------------------------------------------------===// | |||
4402 | // Other Decl Allocation/Deallocation Method Implementations | |||
4403 | //===----------------------------------------------------------------------===// | |||
4404 | ||||
4405 | void TranslationUnitDecl::anchor() {} | |||
4406 | ||||
4407 | TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) { | |||
4408 | return new (C, (DeclContext *)nullptr) TranslationUnitDecl(C); | |||
4409 | } | |||
4410 | ||||
4411 | void PragmaCommentDecl::anchor() {} | |||
4412 | ||||
4413 | PragmaCommentDecl *PragmaCommentDecl::Create(const ASTContext &C, | |||
4414 | TranslationUnitDecl *DC, | |||
4415 | SourceLocation CommentLoc, | |||
4416 | PragmaMSCommentKind CommentKind, | |||
4417 | StringRef Arg) { | |||
4418 | PragmaCommentDecl *PCD = | |||
4419 | new (C, DC, additionalSizeToAlloc<char>(Arg.size() + 1)) | |||
4420 | PragmaCommentDecl(DC, CommentLoc, CommentKind); | |||
4421 | memcpy(PCD->getTrailingObjects<char>(), Arg.data(), Arg.size()); | |||
4422 | PCD->getTrailingObjects<char>()[Arg.size()] = '\0'; | |||
4423 | return PCD; | |||
4424 | } | |||
4425 | ||||
4426 | PragmaCommentDecl *PragmaCommentDecl::CreateDeserialized(ASTContext &C, | |||
4427 | unsigned ID, | |||
4428 | unsigned ArgSize) { | |||
4429 | return new (C, ID, additionalSizeToAlloc<char>(ArgSize + 1)) | |||
4430 | PragmaCommentDecl(nullptr, SourceLocation(), PCK_Unknown); | |||
4431 | } | |||
4432 | ||||
4433 | void PragmaDetectMismatchDecl::anchor() {} | |||
4434 | ||||
4435 | PragmaDetectMismatchDecl * | |||
4436 | PragmaDetectMismatchDecl::Create(const ASTContext &C, TranslationUnitDecl *DC, | |||
4437 | SourceLocation Loc, StringRef Name, | |||
4438 | StringRef Value) { | |||
4439 | size_t ValueStart = Name.size() + 1; | |||
4440 | PragmaDetectMismatchDecl *PDMD = | |||
4441 | new (C, DC, additionalSizeToAlloc<char>(ValueStart + Value.size() + 1)) | |||
4442 | PragmaDetectMismatchDecl(DC, Loc, ValueStart); | |||
4443 | memcpy(PDMD->getTrailingObjects<char>(), Name.data(), Name.size()); | |||
4444 | PDMD->getTrailingObjects<char>()[Name.size()] = '\0'; | |||
4445 | memcpy(PDMD->getTrailingObjects<char>() + ValueStart, Value.data(), | |||
4446 | Value.size()); | |||
4447 | PDMD->getTrailingObjects<char>()[ValueStart + Value.size()] = '\0'; | |||
4448 | return PDMD; | |||
4449 | } | |||
4450 | ||||
4451 | PragmaDetectMismatchDecl * | |||
4452 | PragmaDetectMismatchDecl::CreateDeserialized(ASTContext &C, unsigned ID, | |||
4453 | unsigned NameValueSize) { | |||
4454 | return new (C, ID, additionalSizeToAlloc<char>(NameValueSize + 1)) | |||
4455 | PragmaDetectMismatchDecl(nullptr, SourceLocation(), 0); | |||
4456 | } | |||
4457 | ||||
4458 | void ExternCContextDecl::anchor() {} | |||
4459 | ||||
4460 | ExternCContextDecl *ExternCContextDecl::Create(const ASTContext &C, | |||
4461 | TranslationUnitDecl *DC) { | |||
4462 | return new (C, DC) ExternCContextDecl(DC); | |||
4463 | } | |||
4464 | ||||
4465 | void LabelDecl::anchor() {} | |||
4466 | ||||
4467 | LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC, | |||
4468 | SourceLocation IdentL, IdentifierInfo *II) { | |||
4469 | return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, IdentL); | |||
4470 | } | |||
4471 | ||||
4472 | LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC, | |||
4473 | SourceLocation IdentL, IdentifierInfo *II, | |||
4474 | SourceLocation GnuLabelL) { | |||
4475 | assert(GnuLabelL != IdentL && "Use this only for GNU local labels")((GnuLabelL != IdentL && "Use this only for GNU local labels" ) ? static_cast<void> (0) : __assert_fail ("GnuLabelL != IdentL && \"Use this only for GNU local labels\"" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4475, __PRETTY_FUNCTION__)); | |||
4476 | return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, GnuLabelL); | |||
4477 | } | |||
4478 | ||||
4479 | LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
4480 | return new (C, ID) LabelDecl(nullptr, SourceLocation(), nullptr, nullptr, | |||
4481 | SourceLocation()); | |||
4482 | } | |||
4483 | ||||
4484 | void LabelDecl::setMSAsmLabel(StringRef Name) { | |||
4485 | char *Buffer = new (getASTContext(), 1) char[Name.size() + 1]; | |||
| ||||
4486 | memcpy(Buffer, Name.data(), Name.size()); | |||
| ||||
4487 | Buffer[Name.size()] = '\0'; | |||
4488 | MSAsmName = Buffer; | |||
4489 | } | |||
4490 | ||||
4491 | void ValueDecl::anchor() {} | |||
4492 | ||||
4493 | bool ValueDecl::isWeak() const { | |||
4494 | for (const auto *I : attrs()) | |||
4495 | if (isa<WeakAttr>(I) || isa<WeakRefAttr>(I)) | |||
4496 | return true; | |||
4497 | ||||
4498 | return isWeakImported(); | |||
4499 | } | |||
4500 | ||||
4501 | void ImplicitParamDecl::anchor() {} | |||
4502 | ||||
4503 | ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC, | |||
4504 | SourceLocation IdLoc, | |||
4505 | IdentifierInfo *Id, QualType Type, | |||
4506 | ImplicitParamKind ParamKind) { | |||
4507 | return new (C, DC) ImplicitParamDecl(C, DC, IdLoc, Id, Type, ParamKind); | |||
4508 | } | |||
4509 | ||||
4510 | ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, QualType Type, | |||
4511 | ImplicitParamKind ParamKind) { | |||
4512 | return new (C, nullptr) ImplicitParamDecl(C, Type, ParamKind); | |||
4513 | } | |||
4514 | ||||
4515 | ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C, | |||
4516 | unsigned ID) { | |||
4517 | return new (C, ID) ImplicitParamDecl(C, QualType(), ImplicitParamKind::Other); | |||
4518 | } | |||
4519 | ||||
4520 | FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC, | |||
4521 | SourceLocation StartLoc, | |||
4522 | const DeclarationNameInfo &NameInfo, | |||
4523 | QualType T, TypeSourceInfo *TInfo, | |||
4524 | StorageClass SC, | |||
4525 | bool isInlineSpecified, | |||
4526 | bool hasWrittenPrototype, | |||
4527 | bool isConstexprSpecified) { | |||
4528 | FunctionDecl *New = | |||
4529 | new (C, DC) FunctionDecl(Function, C, DC, StartLoc, NameInfo, T, TInfo, | |||
4530 | SC, isInlineSpecified, isConstexprSpecified); | |||
4531 | New->setHasWrittenPrototype(hasWrittenPrototype); | |||
4532 | return New; | |||
4533 | } | |||
4534 | ||||
4535 | FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
4536 | return new (C, ID) FunctionDecl(Function, C, nullptr, SourceLocation(), | |||
4537 | DeclarationNameInfo(), QualType(), nullptr, | |||
4538 | SC_None, false, false); | |||
4539 | } | |||
4540 | ||||
4541 | BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) { | |||
4542 | return new (C, DC) BlockDecl(DC, L); | |||
4543 | } | |||
4544 | ||||
4545 | BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
4546 | return new (C, ID) BlockDecl(nullptr, SourceLocation()); | |||
4547 | } | |||
4548 | ||||
4549 | CapturedDecl::CapturedDecl(DeclContext *DC, unsigned NumParams) | |||
4550 | : Decl(Captured, DC, SourceLocation()), DeclContext(Captured), | |||
4551 | NumParams(NumParams), ContextParam(0), BodyAndNothrow(nullptr, false) {} | |||
4552 | ||||
4553 | CapturedDecl *CapturedDecl::Create(ASTContext &C, DeclContext *DC, | |||
4554 | unsigned NumParams) { | |||
4555 | return new (C, DC, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams)) | |||
4556 | CapturedDecl(DC, NumParams); | |||
4557 | } | |||
4558 | ||||
4559 | CapturedDecl *CapturedDecl::CreateDeserialized(ASTContext &C, unsigned ID, | |||
4560 | unsigned NumParams) { | |||
4561 | return new (C, ID, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams)) | |||
4562 | CapturedDecl(nullptr, NumParams); | |||
4563 | } | |||
4564 | ||||
4565 | Stmt *CapturedDecl::getBody() const { return BodyAndNothrow.getPointer(); } | |||
4566 | void CapturedDecl::setBody(Stmt *B) { BodyAndNothrow.setPointer(B); } | |||
4567 | ||||
4568 | bool CapturedDecl::isNothrow() const { return BodyAndNothrow.getInt(); } | |||
4569 | void CapturedDecl::setNothrow(bool Nothrow) { BodyAndNothrow.setInt(Nothrow); } | |||
4570 | ||||
4571 | EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD, | |||
4572 | SourceLocation L, | |||
4573 | IdentifierInfo *Id, QualType T, | |||
4574 | Expr *E, const llvm::APSInt &V) { | |||
4575 | return new (C, CD) EnumConstantDecl(CD, L, Id, T, E, V); | |||
4576 | } | |||
4577 | ||||
4578 | EnumConstantDecl * | |||
4579 | EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
4580 | return new (C, ID) EnumConstantDecl(nullptr, SourceLocation(), nullptr, | |||
4581 | QualType(), nullptr, llvm::APSInt()); | |||
4582 | } | |||
4583 | ||||
4584 | void IndirectFieldDecl::anchor() {} | |||
4585 | ||||
4586 | IndirectFieldDecl::IndirectFieldDecl(ASTContext &C, DeclContext *DC, | |||
4587 | SourceLocation L, DeclarationName N, | |||
4588 | QualType T, | |||
4589 | MutableArrayRef<NamedDecl *> CH) | |||
4590 | : ValueDecl(IndirectField, DC, L, N, T), Chaining(CH.data()), | |||
4591 | ChainingSize(CH.size()) { | |||
4592 | // In C++, indirect field declarations conflict with tag declarations in the | |||
4593 | // same scope, so add them to IDNS_Tag so that tag redeclaration finds them. | |||
4594 | if (C.getLangOpts().CPlusPlus) | |||
4595 | IdentifierNamespace |= IDNS_Tag; | |||
4596 | } | |||
4597 | ||||
4598 | IndirectFieldDecl * | |||
4599 | IndirectFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L, | |||
4600 | IdentifierInfo *Id, QualType T, | |||
4601 | llvm::MutableArrayRef<NamedDecl *> CH) { | |||
4602 | return new (C, DC) IndirectFieldDecl(C, DC, L, Id, T, CH); | |||
4603 | } | |||
4604 | ||||
4605 | IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C, | |||
4606 | unsigned ID) { | |||
4607 | return new (C, ID) IndirectFieldDecl(C, nullptr, SourceLocation(), | |||
4608 | DeclarationName(), QualType(), None); | |||
4609 | } | |||
4610 | ||||
4611 | SourceRange EnumConstantDecl::getSourceRange() const { | |||
4612 | SourceLocation End = getLocation(); | |||
4613 | if (Init) | |||
4614 | End = Init->getEndLoc(); | |||
4615 | return SourceRange(getLocation(), End); | |||
4616 | } | |||
4617 | ||||
4618 | void TypeDecl::anchor() {} | |||
4619 | ||||
4620 | TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC, | |||
4621 | SourceLocation StartLoc, SourceLocation IdLoc, | |||
4622 | IdentifierInfo *Id, TypeSourceInfo *TInfo) { | |||
4623 | return new (C, DC) TypedefDecl(C, DC, StartLoc, IdLoc, Id, TInfo); | |||
4624 | } | |||
4625 | ||||
4626 | void TypedefNameDecl::anchor() {} | |||
4627 | ||||
4628 | TagDecl *TypedefNameDecl::getAnonDeclWithTypedefName(bool AnyRedecl) const { | |||
4629 | if (auto *TT = getTypeSourceInfo()->getType()->getAs<TagType>()) { | |||
4630 | auto *OwningTypedef = TT->getDecl()->getTypedefNameForAnonDecl(); | |||
4631 | auto *ThisTypedef = this; | |||
4632 | if (AnyRedecl && OwningTypedef) { | |||
4633 | OwningTypedef = OwningTypedef->getCanonicalDecl(); | |||
4634 | ThisTypedef = ThisTypedef->getCanonicalDecl(); | |||
4635 | } | |||
4636 | if (OwningTypedef == ThisTypedef) | |||
4637 | return TT->getDecl(); | |||
4638 | } | |||
4639 | ||||
4640 | return nullptr; | |||
4641 | } | |||
4642 | ||||
4643 | bool TypedefNameDecl::isTransparentTagSlow() const { | |||
4644 | auto determineIsTransparent = [&]() { | |||
4645 | if (auto *TT = getUnderlyingType()->getAs<TagType>()) { | |||
4646 | if (auto *TD = TT->getDecl()) { | |||
4647 | if (TD->getName() != getName()) | |||
4648 | return false; | |||
4649 | SourceLocation TTLoc = getLocation(); | |||
4650 | SourceLocation TDLoc = TD->getLocation(); | |||
4651 | if (!TTLoc.isMacroID() || !TDLoc.isMacroID()) | |||
4652 | return false; | |||
4653 | SourceManager &SM = getASTContext().getSourceManager(); | |||
4654 | return SM.getSpellingLoc(TTLoc) == SM.getSpellingLoc(TDLoc); | |||
4655 | } | |||
4656 | } | |||
4657 | return false; | |||
4658 | }; | |||
4659 | ||||
4660 | bool isTransparent = determineIsTransparent(); | |||
4661 | MaybeModedTInfo.setInt((isTransparent << 1) | 1); | |||
4662 | return isTransparent; | |||
4663 | } | |||
4664 | ||||
4665 | TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
4666 | return new (C, ID) TypedefDecl(C, nullptr, SourceLocation(), SourceLocation(), | |||
4667 | nullptr, nullptr); | |||
4668 | } | |||
4669 | ||||
4670 | TypeAliasDecl *TypeAliasDecl::Create(ASTContext &C, DeclContext *DC, | |||
4671 | SourceLocation StartLoc, | |||
4672 | SourceLocation IdLoc, IdentifierInfo *Id, | |||
4673 | TypeSourceInfo *TInfo) { | |||
4674 | return new (C, DC) TypeAliasDecl(C, DC, StartLoc, IdLoc, Id, TInfo); | |||
4675 | } | |||
4676 | ||||
4677 | TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
4678 | return new (C, ID) TypeAliasDecl(C, nullptr, SourceLocation(), | |||
4679 | SourceLocation(), nullptr, nullptr); | |||
4680 | } | |||
4681 | ||||
4682 | SourceRange TypedefDecl::getSourceRange() const { | |||
4683 | SourceLocation RangeEnd = getLocation(); | |||
4684 | if (TypeSourceInfo *TInfo = getTypeSourceInfo()) { | |||
4685 | if (typeIsPostfix(TInfo->getType())) | |||
4686 | RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); | |||
4687 | } | |||
4688 | return SourceRange(getBeginLoc(), RangeEnd); | |||
4689 | } | |||
4690 | ||||
4691 | SourceRange TypeAliasDecl::getSourceRange() const { | |||
4692 | SourceLocation RangeEnd = getBeginLoc(); | |||
4693 | if (TypeSourceInfo *TInfo = getTypeSourceInfo()) | |||
4694 | RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); | |||
4695 | return SourceRange(getBeginLoc(), RangeEnd); | |||
4696 | } | |||
4697 | ||||
4698 | void FileScopeAsmDecl::anchor() {} | |||
4699 | ||||
4700 | FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC, | |||
4701 | StringLiteral *Str, | |||
4702 | SourceLocation AsmLoc, | |||
4703 | SourceLocation RParenLoc) { | |||
4704 | return new (C, DC) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc); | |||
4705 | } | |||
4706 | ||||
4707 | FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C, | |||
4708 | unsigned ID) { | |||
4709 | return new (C, ID) FileScopeAsmDecl(nullptr, nullptr, SourceLocation(), | |||
4710 | SourceLocation()); | |||
4711 | } | |||
4712 | ||||
4713 | void EmptyDecl::anchor() {} | |||
4714 | ||||
4715 | EmptyDecl *EmptyDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) { | |||
4716 | return new (C, DC) EmptyDecl(DC, L); | |||
4717 | } | |||
4718 | ||||
4719 | EmptyDecl *EmptyDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
4720 | return new (C, ID) EmptyDecl(nullptr, SourceLocation()); | |||
4721 | } | |||
4722 | ||||
4723 | //===----------------------------------------------------------------------===// | |||
4724 | // ImportDecl Implementation | |||
4725 | //===----------------------------------------------------------------------===// | |||
4726 | ||||
4727 | /// Retrieve the number of module identifiers needed to name the given | |||
4728 | /// module. | |||
4729 | static unsigned getNumModuleIdentifiers(Module *Mod) { | |||
4730 | unsigned Result = 1; | |||
4731 | while (Mod->Parent) { | |||
4732 | Mod = Mod->Parent; | |||
4733 | ++Result; | |||
4734 | } | |||
4735 | return Result; | |||
4736 | } | |||
4737 | ||||
4738 | ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc, | |||
4739 | Module *Imported, | |||
4740 | ArrayRef<SourceLocation> IdentifierLocs) | |||
4741 | : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, true) { | |||
4742 | assert(getNumModuleIdentifiers(Imported) == IdentifierLocs.size())((getNumModuleIdentifiers(Imported) == IdentifierLocs.size()) ? static_cast<void> (0) : __assert_fail ("getNumModuleIdentifiers(Imported) == IdentifierLocs.size()" , "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp" , 4742, __PRETTY_FUNCTION__)); | |||
4743 | auto *StoredLocs = getTrailingObjects<SourceLocation>(); | |||
4744 | std::uninitialized_copy(IdentifierLocs.begin(), IdentifierLocs.end(), | |||
4745 | StoredLocs); | |||
4746 | } | |||
4747 | ||||
4748 | ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc, | |||
4749 | Module *Imported, SourceLocation EndLoc) | |||
4750 | : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, false) { | |||
4751 | *getTrailingObjects<SourceLocation>() = EndLoc; | |||
4752 | } | |||
4753 | ||||
4754 | ImportDecl *ImportDecl::Create(ASTContext &C, DeclContext *DC, | |||
4755 | SourceLocation StartLoc, Module *Imported, | |||
4756 | ArrayRef<SourceLocation> IdentifierLocs) { | |||
4757 | return new (C, DC, | |||
4758 | additionalSizeToAlloc<SourceLocation>(IdentifierLocs.size())) | |||
4759 | ImportDecl(DC, StartLoc, Imported, IdentifierLocs); | |||
4760 | } | |||
4761 | ||||
4762 | ImportDecl *ImportDecl::CreateImplicit(ASTContext &C, DeclContext *DC, | |||
4763 | SourceLocation StartLoc, | |||
4764 | Module *Imported, | |||
4765 | SourceLocation EndLoc) { | |||
4766 | ImportDecl *Import = new (C, DC, additionalSizeToAlloc<SourceLocation>(1)) | |||
4767 | ImportDecl(DC, StartLoc, Imported, EndLoc); | |||
4768 | Import->setImplicit(); | |||
4769 | return Import; | |||
4770 | } | |||
4771 | ||||
4772 | ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID, | |||
4773 | unsigned NumLocations) { | |||
4774 | return new (C, ID, additionalSizeToAlloc<SourceLocation>(NumLocations)) | |||
4775 | ImportDecl(EmptyShell()); | |||
4776 | } | |||
4777 | ||||
4778 | ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const { | |||
4779 | if (!ImportedAndComplete.getInt()) | |||
4780 | return None; | |||
4781 | ||||
4782 | const auto *StoredLocs = getTrailingObjects<SourceLocation>(); | |||
4783 | return llvm::makeArrayRef(StoredLocs, | |||
4784 | getNumModuleIdentifiers(getImportedModule())); | |||
4785 | } | |||
4786 | ||||
4787 | SourceRange ImportDecl::getSourceRange() const { | |||
4788 | if (!ImportedAndComplete.getInt()) | |||
4789 | return SourceRange(getLocation(), *getTrailingObjects<SourceLocation>()); | |||
4790 | ||||
4791 | return SourceRange(getLocation(), getIdentifierLocs().back()); | |||
4792 | } | |||
4793 | ||||
4794 | //===----------------------------------------------------------------------===// | |||
4795 | // ExportDecl Implementation | |||
4796 | //===----------------------------------------------------------------------===// | |||
4797 | ||||
4798 | void ExportDecl::anchor() {} | |||
4799 | ||||
4800 | ExportDecl *ExportDecl::Create(ASTContext &C, DeclContext *DC, | |||
4801 | SourceLocation ExportLoc) { | |||
4802 | return new (C, DC) ExportDecl(DC, ExportLoc); | |||
4803 | } | |||
4804 | ||||
4805 | ExportDecl *ExportDecl::CreateDeserialized(ASTContext &C, unsigned ID) { | |||
4806 | return new (C, ID) ExportDecl(nullptr, SourceLocation()); | |||
4807 | } |